diff options
Diffstat (limited to 'drivers/scsi')
47 files changed, 4497 insertions, 4978 deletions
diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c index bf5d63e1bee..656bdb1352d 100644 --- a/drivers/scsi/3w-xxxx.c +++ b/drivers/scsi/3w-xxxx.c @@ -1864,10 +1864,17 @@ static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id) /* This function will handle the request sense scsi command */ static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id) { + char request_buffer[18]; + dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n"); - /* For now we just zero the request buffer */ - memset(tw_dev->srb[request_id]->request_buffer, 0, tw_dev->srb[request_id]->request_bufflen); + memset(request_buffer, 0, sizeof(request_buffer)); + request_buffer[0] = 0x70; /* Immediate fixed format */ + request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */ + /* leave all other fields zero, giving effectively NO_SENSE return */ + tw_transfer_internal(tw_dev, request_id, request_buffer, + sizeof(request_buffer)); + tw_dev->state[request_id] = TW_S_COMPLETED; tw_state_request_finish(tw_dev, request_id); diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 5bf3f07870b..fcc4cb6c7f4 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -230,6 +230,7 @@ config SCSI_SCAN_ASYNC The SCSI subsystem can probe for devices while the rest of the system continues booting, and even probe devices on different busses in parallel, leading to a significant speed-up. + If you have built SCSI as modules, enabling this option can be a problem as the devices may not have been found by the time your system expects them to have been. You can load the @@ -237,8 +238,8 @@ config SCSI_SCAN_ASYNC If you build your SCSI drivers into the kernel, then everything will work fine if you say Y here. - You can override this choice by specifying scsi_mod.scan="sync" - or "async" on the kernel's command line. + You can override this choice by specifying "scsi_mod.scan=sync" + or async on the kernel's command line. menu "SCSI Transports" depends on SCSI @@ -1762,9 +1763,15 @@ config SUN3X_ESP The ESP was an on-board SCSI controller used on Sun 3/80 machines. Say Y here to compile in support for it. +config SCSI_ESP_CORE + tristate "ESP Scsi Driver Core" + depends on SCSI + select SCSI_SPI_ATTRS + config SCSI_SUNESP tristate "Sparc ESP Scsi Driver" depends on SBUS && SCSI + select SCSI_ESP_CORE help This is the driver for the Sun ESP SCSI host adapter. The ESP chipset is present in most SPARC SBUS-based computers. diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index 79ecf4ebe6e..70cff4c599d 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -106,7 +106,8 @@ obj-$(CONFIG_MEGARAID_LEGACY) += megaraid.o obj-$(CONFIG_MEGARAID_NEWGEN) += megaraid/ obj-$(CONFIG_MEGARAID_SAS) += megaraid/ obj-$(CONFIG_SCSI_ACARD) += atp870u.o -obj-$(CONFIG_SCSI_SUNESP) += esp.o +obj-$(CONFIG_SCSI_ESP_CORE) += esp_scsi.o +obj-$(CONFIG_SCSI_SUNESP) += sun_esp.o obj-$(CONFIG_SCSI_GDTH) += gdth.o obj-$(CONFIG_SCSI_INITIO) += initio.o obj-$(CONFIG_SCSI_INIA100) += a100u2w.o diff --git a/drivers/scsi/a100u2w.c b/drivers/scsi/a100u2w.c index 2650a5d0a16..7f4241bfb9c 100644 --- a/drivers/scsi/a100u2w.c +++ b/drivers/scsi/a100u2w.c @@ -1067,7 +1067,7 @@ static int __devinit inia100_probe_one(struct pci_dev *pdev, goto out_disable_device; } - /* <02> read from base address + 0x50 offset to get the bios balue. */ + /* <02> read from base address + 0x50 offset to get the bios value. */ bios = ORC_RDWORD(port, 0x50); diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c index c7fe478f481..2be03e975d9 100644 --- a/drivers/scsi/aic7xxx/aic79xx_osm.c +++ b/drivers/scsi/aic7xxx/aic79xx_osm.c @@ -418,7 +418,6 @@ ahd_linux_info(struct Scsi_Host *host) strcat(bp, " "); ahd_controller_info(ahd, ahd_info); strcat(bp, ahd_info); - strcat(bp, "\n"); return (bp); } diff --git a/drivers/scsi/aic94xx/aic94xx_seq.c b/drivers/scsi/aic94xx/aic94xx_seq.c index eae7a247bec..c750fbf7013 100644 --- a/drivers/scsi/aic94xx/aic94xx_seq.c +++ b/drivers/scsi/aic94xx/aic94xx_seq.c @@ -44,7 +44,6 @@ #define PAUSE_TRIES 1000 static const struct firmware *sequencer_fw; -static const char *sequencer_version; static u16 cseq_vecs[CSEQ_NUM_VECS], lseq_vecs[LSEQ_NUM_VECS], mode2_task, cseq_idle_loop, lseq_idle_loop; static u8 *cseq_code, *lseq_code; @@ -1276,7 +1275,6 @@ static int asd_request_firmware(struct asd_ha_struct *asd_ha) header.csum = le32_to_cpu(hdr_ptr->csum); header.major = le32_to_cpu(hdr_ptr->major); header.minor = le32_to_cpu(hdr_ptr->minor); - sequencer_version = hdr_ptr->version; header.cseq_table_offset = le32_to_cpu(hdr_ptr->cseq_table_offset); header.cseq_table_size = le32_to_cpu(hdr_ptr->cseq_table_size); header.lseq_table_offset = le32_to_cpu(hdr_ptr->lseq_table_offset); @@ -1303,6 +1301,16 @@ static int asd_request_firmware(struct asd_ha_struct *asd_ha) return -EINVAL; } + asd_printk("Found sequencer Firmware version %d.%d (%s)\n", + header.major, header.minor, hdr_ptr->version); + + if (header.major != SAS_RAZOR_SEQUENCER_FW_MAJOR) { + asd_printk("Firmware Major Version Mismatch;" + "driver requires version %d.X", + SAS_RAZOR_SEQUENCER_FW_MAJOR); + return -EINVAL; + } + ptr_cseq_vecs = (u16 *)&sequencer_fw->data[header.cseq_table_offset]; ptr_lseq_vecs = (u16 *)&sequencer_fw->data[header.lseq_table_offset]; mode2_task = header.mode2_task; @@ -1335,7 +1343,6 @@ int asd_init_seqs(struct asd_ha_struct *asd_ha) return err; } - asd_printk("using sequencer %s\n", sequencer_version); err = asd_seq_download_seqs(asd_ha); if (err) { asd_printk("couldn't download sequencers for %s\n", diff --git a/drivers/scsi/aic94xx/aic94xx_seq.h b/drivers/scsi/aic94xx/aic94xx_seq.h index 9437ff0ae3a..2ea6a0d5220 100644 --- a/drivers/scsi/aic94xx/aic94xx_seq.h +++ b/drivers/scsi/aic94xx/aic94xx_seq.h @@ -31,6 +31,7 @@ #define LSEQ_NUM_VECS 11 #define SAS_RAZOR_SEQUENCER_FW_FILE "aic94xx-seq.fw" +#define SAS_RAZOR_SEQUENCER_FW_MAJOR 1 /* Note: All quantites in the sequencer file are little endian */ struct sequencer_file_header { diff --git a/drivers/scsi/arm/cumana_2.c b/drivers/scsi/arm/cumana_2.c index d2d51dc51ab..82add77ad13 100644 --- a/drivers/scsi/arm/cumana_2.c +++ b/drivers/scsi/arm/cumana_2.c @@ -178,10 +178,10 @@ cumanascsi_2_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp, dma_dir = DMA_MODE_READ, alatch_dir = ALATCH_DMA_IN; - dma_map_sg(dev, info->sg, bufs + 1, map_dir); + dma_map_sg(dev, info->sg, bufs, map_dir); disable_dma(dmach); - set_dma_sg(dmach, info->sg, bufs + 1); + set_dma_sg(dmach, info->sg, bufs); writeb(alatch_dir, info->base + CUMANASCSI2_ALATCH); set_dma_mode(dmach, dma_dir); enable_dma(dmach); diff --git a/drivers/scsi/arm/eesox.c b/drivers/scsi/arm/eesox.c index 4677152142d..ed06a8c19ad 100644 --- a/drivers/scsi/arm/eesox.c +++ b/drivers/scsi/arm/eesox.c @@ -175,10 +175,10 @@ eesoxscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp, map_dir = DMA_FROM_DEVICE, dma_dir = DMA_MODE_READ; - dma_map_sg(dev, info->sg, bufs + 1, map_dir); + dma_map_sg(dev, info->sg, bufs, map_dir); disable_dma(dmach); - set_dma_sg(dmach, info->sg, bufs + 1); + set_dma_sg(dmach, info->sg, bufs); set_dma_mode(dmach, dma_dir); enable_dma(dmach); return fasdma_real_all; @@ -196,7 +196,7 @@ static void eesoxscsi_buffer_in(void *buf, int length, void __iomem *base) const void __iomem *reg_fas = base + EESOX_FAS216_OFFSET; const void __iomem *reg_dmastat = base + EESOX_DMASTAT; const void __iomem *reg_dmadata = base + EESOX_DMADATA; - const register unsigned long mask = 0xffff; + register const unsigned long mask = 0xffff; do { unsigned int status; diff --git a/drivers/scsi/arm/fas216.c b/drivers/scsi/arm/fas216.c index 2969cc0ff25..fb5f2028438 100644 --- a/drivers/scsi/arm/fas216.c +++ b/drivers/scsi/arm/fas216.c @@ -633,7 +633,7 @@ static void fas216_updateptrs(FAS216_Info *info, int bytes_transferred) BUG_ON(bytes_transferred < 0); - info->SCpnt->request_bufflen -= bytes_transferred; + SCp->phase -= bytes_transferred; while (bytes_transferred != 0) { if (SCp->this_residual > bytes_transferred) @@ -715,7 +715,7 @@ static void fas216_cleanuptransfer(FAS216_Info *info) return; if (dmatype == fasdma_real_all) - total = info->SCpnt->request_bufflen; + total = info->scsi.SCp.phase; else total = info->scsi.SCp.this_residual; @@ -753,7 +753,7 @@ static void fas216_transfer(FAS216_Info *info) fas216_log(info, LOG_BUFFER, "starttransfer: buffer %p length 0x%06x reqlen 0x%06x", info->scsi.SCp.ptr, info->scsi.SCp.this_residual, - info->SCpnt->request_bufflen); + info->scsi.SCp.phase); if (!info->scsi.SCp.ptr) { fas216_log(info, LOG_ERROR, "null buffer passed to " @@ -784,7 +784,7 @@ static void fas216_transfer(FAS216_Info *info) info->dma.transfer_type = dmatype; if (dmatype == fasdma_real_all) - fas216_set_stc(info, info->SCpnt->request_bufflen); + fas216_set_stc(info, info->scsi.SCp.phase); else fas216_set_stc(info, info->scsi.SCp.this_residual); @@ -2114,6 +2114,7 @@ request_sense: SCpnt->SCp.buffers_residual = 0; SCpnt->SCp.ptr = (char *)SCpnt->sense_buffer; SCpnt->SCp.this_residual = sizeof(SCpnt->sense_buffer); + SCpnt->SCp.phase = sizeof(SCpnt->sense_buffer); SCpnt->SCp.Message = 0; SCpnt->SCp.Status = 0; SCpnt->request_bufflen = sizeof(SCpnt->sense_buffer); diff --git a/drivers/scsi/arm/powertec.c b/drivers/scsi/arm/powertec.c index f9cd20bfb95..159047a3499 100644 --- a/drivers/scsi/arm/powertec.c +++ b/drivers/scsi/arm/powertec.c @@ -148,10 +148,10 @@ powertecscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp, map_dir = DMA_FROM_DEVICE, dma_dir = DMA_MODE_READ; - dma_map_sg(dev, info->sg, bufs + 1, map_dir); + dma_map_sg(dev, info->sg, bufs, map_dir); disable_dma(dmach); - set_dma_sg(dmach, info->sg, bufs + 1); + set_dma_sg(dmach, info->sg, bufs); set_dma_mode(dmach, dma_dir); enable_dma(dmach); return fasdma_real_all; @@ -342,6 +342,7 @@ powertecscsi_probe(struct expansion_card *ec, const struct ecard_id *id) info->base = base; powertecscsi_terminator_ctl(host, term[ec->slot_no]); + info->ec = ec; info->info.scsi.io_base = base + POWERTEC_FAS216_OFFSET; info->info.scsi.io_shift = POWERTEC_FAS216_SHIFT; info->info.scsi.irq = ec->irq; diff --git a/drivers/scsi/arm/scsi.h b/drivers/scsi/arm/scsi.h index 3a39579bd08..21ba57155be 100644 --- a/drivers/scsi/arm/scsi.h +++ b/drivers/scsi/arm/scsi.h @@ -80,6 +80,7 @@ static inline void init_SCp(struct scsi_cmnd *SCpnt) (page_address(SCpnt->SCp.buffer->page) + SCpnt->SCp.buffer->offset); SCpnt->SCp.this_residual = SCpnt->SCp.buffer->length; + SCpnt->SCp.phase = SCpnt->request_bufflen; #ifdef BELT_AND_BRACES /* @@ -98,6 +99,7 @@ static inline void init_SCp(struct scsi_cmnd *SCpnt) } else { SCpnt->SCp.ptr = (unsigned char *)SCpnt->request_buffer; SCpnt->SCp.this_residual = SCpnt->request_bufflen; + SCpnt->SCp.phase = SCpnt->request_bufflen; } /* diff --git a/drivers/scsi/esp.c b/drivers/scsi/esp.c deleted file mode 100644 index 2c2fe80bc42..00000000000 --- a/drivers/scsi/esp.c +++ /dev/null @@ -1,4394 +0,0 @@ -/* esp.c: ESP Sun SCSI driver. - * - * Copyright (C) 1995, 1998, 2006 David S. Miller (davem@davemloft.net) - */ - -/* TODO: - * - * 1) Maybe disable parity checking in config register one for SCSI1 - * targets. (Gilmore says parity error on the SBus can lock up - * old sun4c's) - * 2) Add support for DMA2 pipelining. - * 3) Add tagged queueing. - */ - -#include <linux/kernel.h> -#include <linux/delay.h> -#include <linux/types.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/blkdev.h> -#include <linux/proc_fs.h> -#include <linux/stat.h> -#include <linux/init.h> -#include <linux/spinlock.h> -#include <linux/interrupt.h> -#include <linux/module.h> - -#include "esp.h" - -#include <asm/sbus.h> -#include <asm/dma.h> -#include <asm/system.h> -#include <asm/ptrace.h> -#include <asm/pgtable.h> -#include <asm/oplib.h> -#include <asm/io.h> -#include <asm/irq.h> -#ifndef __sparc_v9__ -#include <asm/machines.h> -#include <asm/idprom.h> -#endif - -#include <scsi/scsi.h> -#include <scsi/scsi_cmnd.h> -#include <scsi/scsi_device.h> -#include <scsi/scsi_eh.h> -#include <scsi/scsi_host.h> -#include <scsi/scsi_tcq.h> - -#define DRV_VERSION "1.101" - -#define DEBUG_ESP -/* #define DEBUG_ESP_HME */ -/* #define DEBUG_ESP_DATA */ -/* #define DEBUG_ESP_QUEUE */ -/* #define DEBUG_ESP_DISCONNECT */ -/* #define DEBUG_ESP_STATUS */ -/* #define DEBUG_ESP_PHASES */ -/* #define DEBUG_ESP_WORKBUS */ -/* #define DEBUG_STATE_MACHINE */ -/* #define DEBUG_ESP_CMDS */ -/* #define DEBUG_ESP_IRQS */ -/* #define DEBUG_SDTR */ -/* #define DEBUG_ESP_SG */ - -/* Use the following to sprinkle debugging messages in a way which - * suits you if combinations of the above become too verbose when - * trying to track down a specific problem. - */ -/* #define DEBUG_ESP_MISC */ - -#if defined(DEBUG_ESP) -#define ESPLOG(foo) printk foo -#else -#define ESPLOG(foo) -#endif /* (DEBUG_ESP) */ - -#if defined(DEBUG_ESP_HME) -#define ESPHME(foo) printk foo -#else -#define ESPHME(foo) -#endif - -#if defined(DEBUG_ESP_DATA) -#define ESPDATA(foo) printk foo -#else -#define ESPDATA(foo) -#endif - -#if defined(DEBUG_ESP_QUEUE) -#define ESPQUEUE(foo) printk foo -#else -#define ESPQUEUE(foo) -#endif - -#if defined(DEBUG_ESP_DISCONNECT) -#define ESPDISC(foo) printk foo -#else -#define ESPDISC(foo) -#endif - -#if defined(DEBUG_ESP_STATUS) -#define ESPSTAT(foo) printk foo -#else -#define ESPSTAT(foo) -#endif - -#if defined(DEBUG_ESP_PHASES) -#define ESPPHASE(foo) printk foo -#else -#define ESPPHASE(foo) -#endif - -#if defined(DEBUG_ESP_WORKBUS) -#define ESPBUS(foo) printk foo -#else -#define ESPBUS(foo) -#endif - -#if defined(DEBUG_ESP_IRQS) -#define ESPIRQ(foo) printk foo -#else -#define ESPIRQ(foo) -#endif - -#if defined(DEBUG_SDTR) -#define ESPSDTR(foo) printk foo -#else -#define ESPSDTR(foo) -#endif - -#if defined(DEBUG_ESP_MISC) -#define ESPMISC(foo) printk foo -#else -#define ESPMISC(foo) -#endif - -/* Command phase enumeration. */ -enum { - not_issued = 0x00, /* Still in the issue_SC queue. */ - - /* Various forms of selecting a target. */ -#define in_slct_mask 0x10 - in_slct_norm = 0x10, /* ESP is arbitrating, normal selection */ - in_slct_stop = 0x11, /* ESP will select, then stop with IRQ */ - in_slct_msg = 0x12, /* select, then send a message */ - in_slct_tag = 0x13, /* select and send tagged queue msg */ - in_slct_sneg = 0x14, /* select and acquire sync capabilities */ - - /* Any post selection activity. */ -#define in_phases_mask 0x20 - in_datain = 0x20, /* Data is transferring from the bus */ - in_dataout = 0x21, /* Data is transferring to the bus */ - in_data_done = 0x22, /* Last DMA data operation done (maybe) */ - in_msgin = 0x23, /* Eating message from target */ - in_msgincont = 0x24, /* Eating more msg bytes from target */ - in_msgindone = 0x25, /* Decide what to do with what we got */ - in_msgout = 0x26, /* Sending message to target */ - in_msgoutdone = 0x27, /* Done sending msg out */ - in_cmdbegin = 0x28, /* Sending cmd after abnormal selection */ - in_cmdend = 0x29, /* Done sending slow cmd */ - in_status = 0x2a, /* Was in status phase, finishing cmd */ - in_freeing = 0x2b, /* freeing the bus for cmd cmplt or disc */ - in_the_dark = 0x2c, /* Don't know what bus phase we are in */ - - /* Special states, ie. not normal bus transitions... */ -#define in_spec_mask 0x80 - in_abortone = 0x80, /* Aborting one command currently */ - in_abortall = 0x81, /* Blowing away all commands we have */ - in_resetdev = 0x82, /* SCSI target reset in progress */ - in_resetbus = 0x83, /* SCSI bus reset in progress */ - in_tgterror = 0x84, /* Target did something stupid */ -}; - -enum { - /* Zero has special meaning, see skipahead[12]. */ -/*0*/ do_never, - -/*1*/ do_phase_determine, -/*2*/ do_reset_bus, -/*3*/ do_reset_complete, -/*4*/ do_work_bus, -/*5*/ do_intr_end -}; - -/* Forward declarations. */ -static irqreturn_t esp_intr(int irq, void *dev_id); - -/* Debugging routines */ -struct esp_cmdstrings { - u8 cmdchar; - char *text; -} esp_cmd_strings[] = { - /* Miscellaneous */ - { ESP_CMD_NULL, "ESP_NOP", }, - { ESP_CMD_FLUSH, "FIFO_FLUSH", }, - { ESP_CMD_RC, "RSTESP", }, - { ESP_CMD_RS, "RSTSCSI", }, - /* Disconnected State Group */ - { ESP_CMD_RSEL, "RESLCTSEQ", }, - { ESP_CMD_SEL, "SLCTNATN", }, - { ESP_CMD_SELA, "SLCTATN", }, - { ESP_CMD_SELAS, "SLCTATNSTOP", }, - { ESP_CMD_ESEL, "ENSLCTRESEL", }, - { ESP_CMD_DSEL, "DISSELRESEL", }, - { ESP_CMD_SA3, "SLCTATN3", }, - { ESP_CMD_RSEL3, "RESLCTSEQ", }, - /* Target State Group */ - { ESP_CMD_SMSG, "SNDMSG", }, - { ESP_CMD_SSTAT, "SNDSTATUS", }, - { ESP_CMD_SDATA, "SNDDATA", }, - { ESP_CMD_DSEQ, "DISCSEQ", }, - { ESP_CMD_TSEQ, "TERMSEQ", }, - { ESP_CMD_TCCSEQ, "TRGTCMDCOMPSEQ", }, - { ESP_CMD_DCNCT, "DISC", }, - { ESP_CMD_RMSG, "RCVMSG", }, - { ESP_CMD_RCMD, "RCVCMD", }, - { ESP_CMD_RDATA, "RCVDATA", }, - { ESP_CMD_RCSEQ, "RCVCMDSEQ", }, - /* Initiator State Group */ - { ESP_CMD_TI, "TRANSINFO", }, - { ESP_CMD_ICCSEQ, "INICMDSEQCOMP", }, - { ESP_CMD_MOK, "MSGACCEPTED", }, - { ESP_CMD_TPAD, "TPAD", }, - { ESP_CMD_SATN, "SATN", }, - { ESP_CMD_RATN, "RATN", }, -}; -#define NUM_ESP_COMMANDS ((sizeof(esp_cmd_strings)) / (sizeof(struct esp_cmdstrings))) - -/* Print textual representation of an ESP command */ -static inline void esp_print_cmd(u8 espcmd) -{ - u8 dma_bit = espcmd & ESP_CMD_DMA; - int i; - - espcmd &= ~dma_bit; - for (i = 0; i < NUM_ESP_COMMANDS; i++) - if (esp_cmd_strings[i].cmdchar == espcmd) - break; - if (i == NUM_ESP_COMMANDS) - printk("ESP_Unknown"); - else - printk("%s%s", esp_cmd_strings[i].text, - ((dma_bit) ? "+DMA" : "")); -} - -/* Print the status register's value */ -static inline void esp_print_statreg(u8 statreg) -{ - u8 phase; - - printk("STATUS<"); - phase = statreg & ESP_STAT_PMASK; - printk("%s,", (phase == ESP_DOP ? "DATA-OUT" : - (phase == ESP_DIP ? "DATA-IN" : - (phase == ESP_CMDP ? "COMMAND" : - (phase == ESP_STATP ? "STATUS" : - (phase == ESP_MOP ? "MSG-OUT" : - (phase == ESP_MIP ? "MSG_IN" : - "unknown"))))))); - if (statreg & ESP_STAT_TDONE) - printk("TRANS_DONE,"); - if (statreg & ESP_STAT_TCNT) - printk("TCOUNT_ZERO,"); - if (statreg & ESP_STAT_PERR) - printk("P_ERROR,"); - if (statreg & ESP_STAT_SPAM) - printk("SPAM,"); - if (statreg & ESP_STAT_INTR) - printk("IRQ,"); - printk(">"); -} - -/* Print the interrupt register's value */ -static inline void esp_print_ireg(u8 intreg) -{ - printk("INTREG< "); - if (intreg & ESP_INTR_S) - printk("SLCT_NATN "); - if (intreg & ESP_INTR_SATN) - printk("SLCT_ATN "); - if (intreg & ESP_INTR_RSEL) - printk("RSLCT "); - if (intreg & ESP_INTR_FDONE) - printk("FDONE "); - if (intreg & ESP_INTR_BSERV) - printk("BSERV "); - if (intreg & ESP_INTR_DC) - printk("DISCNCT "); - if (intreg & ESP_INTR_IC) - printk("ILL_CMD "); - if (intreg & ESP_INTR_SR) - printk("SCSI_BUS_RESET "); - printk(">"); -} - -/* Print the sequence step registers contents */ -static inline void esp_print_seqreg(u8 stepreg) -{ - stepreg &= ESP_STEP_VBITS; - printk("STEP<%s>", - (stepreg == ESP_STEP_ASEL ? "SLCT_ARB_CMPLT" : - (stepreg == ESP_STEP_SID ? "1BYTE_MSG_SENT" : - (stepreg == ESP_STEP_NCMD ? "NOT_IN_CMD_PHASE" : - (stepreg == ESP_STEP_PPC ? "CMD_BYTES_LOST" : - (stepreg == ESP_STEP_FINI4 ? "CMD_SENT_OK" : - "UNKNOWN")))))); -} - -static char *phase_string(int phase) -{ - switch (phase) { - case not_issued: - return "UNISSUED"; - case in_slct_norm: - return "SLCTNORM"; - case in_slct_stop: - return "SLCTSTOP"; - case in_slct_msg: - return "SLCTMSG"; - case in_slct_tag: - return "SLCTTAG"; - case in_slct_sneg: - return "SLCTSNEG"; - case in_datain: - return "DATAIN"; - case in_dataout: - return "DATAOUT"; - case in_data_done: - return "DATADONE"; - case in_msgin: - return "MSGIN"; - case in_msgincont: - return "MSGINCONT"; - case in_msgindone: - return "MSGINDONE"; - case in_msgout: - return "MSGOUT"; - case in_msgoutdone: - return "MSGOUTDONE"; - case in_cmdbegin: - return "CMDBEGIN"; - case in_cmdend: - return "CMDEND"; - case in_status: - return "STATUS"; - case in_freeing: - return "FREEING"; - case in_the_dark: - return "CLUELESS"; - case in_abortone: - return "ABORTONE"; - case in_abortall: - return "ABORTALL"; - case in_resetdev: - return "RESETDEV"; - case in_resetbus: - return "RESETBUS"; - case in_tgterror: - return "TGTERROR"; - default: - return "UNKNOWN"; - }; -} - -#ifdef DEBUG_STATE_MACHINE -static inline void esp_advance_phase(struct scsi_cmnd *s, int newphase) -{ - ESPLOG(("<%s>", phase_string(newphase))); - s->SCp.sent_command = s->SCp.phase; - s->SCp.phase = newphase; -} -#else -#define esp_advance_phase(__s, __newphase) \ - (__s)->SCp.sent_command = (__s)->SCp.phase; \ - (__s)->SCp.phase = (__newphase); -#endif - -#ifdef DEBUG_ESP_CMDS -static inline void esp_cmd(struct esp *esp, u8 cmd) -{ - esp->espcmdlog[esp->espcmdent] = cmd; - esp->espcmdent = (esp->espcmdent + 1) & 31; - sbus_writeb(cmd, esp->eregs + ESP_CMD); -} -#else -#define esp_cmd(__esp, __cmd) \ - sbus_writeb((__cmd), ((__esp)->eregs) + ESP_CMD) -#endif - -#define ESP_INTSOFF(__dregs) \ - sbus_writel(sbus_readl((__dregs)+DMA_CSR)&~(DMA_INT_ENAB), (__dregs)+DMA_CSR) -#define ESP_INTSON(__dregs) \ - sbus_writel(sbus_readl((__dregs)+DMA_CSR)|DMA_INT_ENAB, (__dregs)+DMA_CSR) -#define ESP_IRQ_P(__dregs) \ - (sbus_readl((__dregs)+DMA_CSR) & (DMA_HNDL_INTR|DMA_HNDL_ERROR)) - -/* How we use the various Linux SCSI data structures for operation. - * - * struct scsi_cmnd: - * - * We keep track of the synchronous capabilities of a target - * in the device member, using sync_min_period and - * sync_max_offset. These are the values we directly write - * into the ESP registers while running a command. If offset - * is zero the ESP will use asynchronous transfers. - * If the borken flag is set we assume we shouldn't even bother - * trying to negotiate for synchronous transfer as this target - * is really stupid. If we notice the target is dropping the - * bus, and we have been allowing it to disconnect, we clear - * the disconnect flag. - */ - - -/* Manipulation of the ESP command queues. Thanks to the aha152x driver - * and its author, Juergen E. Fischer, for the methods used here. - * Note that these are per-ESP queues, not global queues like - * the aha152x driver uses. - */ -static inline void append_SC(struct scsi_cmnd **SC, struct scsi_cmnd *new_SC) -{ - struct scsi_cmnd *end; - - new_SC->host_scribble = (unsigned char *) NULL; - if (!*SC) - *SC = new_SC; - else { - for (end=*SC;end->host_scribble;end=(struct scsi_cmnd *)end->host_scribble) - ; - end->host_scribble = (unsigned char *) new_SC; - } -} - -static inline void prepend_SC(struct scsi_cmnd **SC, struct scsi_cmnd *new_SC) -{ - new_SC->host_scribble = (unsigned char *) *SC; - *SC = new_SC; -} - -static inline struct scsi_cmnd *remove_first_SC(struct scsi_cmnd **SC) -{ - struct scsi_cmnd *ptr; - ptr = *SC; - if (ptr) - *SC = (struct scsi_cmnd *) (*SC)->host_scribble; - return ptr; -} - -static inline struct scsi_cmnd *remove_SC(struct scsi_cmnd **SC, int target, int lun) -{ - struct scsi_cmnd *ptr, *prev; - - for (ptr = *SC, prev = NULL; - ptr && ((ptr->device->id != target) || (ptr->device->lun != lun)); - prev = ptr, ptr = (struct scsi_cmnd *) ptr->host_scribble) - ; - if (ptr) { - if (prev) - prev->host_scribble=ptr->host_scribble; - else - *SC=(struct scsi_cmnd *)ptr->host_scribble; - } - return ptr; -} - -/* Resetting various pieces of the ESP scsi driver chipset/buses. */ -static void esp_reset_dma(struct esp *esp) -{ - int can_do_burst16, can_do_burst32, can_do_burst64; - int can_do_sbus64; - u32 tmp; - - can_do_burst16 = (esp->bursts & DMA_BURST16) != 0; - can_do_burst32 = (esp->bursts & DMA_BURST32) != 0; - can_do_burst64 = 0; - can_do_sbus64 = 0; - if (sbus_can_dma_64bit(esp->sdev)) - can_do_sbus64 = 1; - if (sbus_can_burst64(esp->sdev)) - can_do_burst64 = (esp->bursts & DMA_BURST64) != 0; - - /* Punt the DVMA into a known state. */ - if (esp->dma->revision != dvmahme) { - tmp = sbus_readl(esp->dregs + DMA_CSR); - sbus_writel(tmp | DMA_RST_SCSI, esp->dregs + DMA_CSR); - sbus_writel(tmp & ~DMA_RST_SCSI, esp->dregs + DMA_CSR); - } - switch (esp->dma->revision) { - case dvmahme: - /* This is the HME DVMA gate array. */ - - sbus_writel(DMA_RESET_FAS366, esp->dregs + DMA_CSR); - sbus_writel(DMA_RST_SCSI, esp->dregs + DMA_CSR); - - esp->prev_hme_dmacsr = (DMA_PARITY_OFF|DMA_2CLKS|DMA_SCSI_DISAB|DMA_INT_ENAB); - esp->prev_hme_dmacsr &= ~(DMA_ENABLE|DMA_ST_WRITE|DMA_BRST_SZ); - - if (can_do_burst64) - esp->prev_hme_dmacsr |= DMA_BRST64; - else if (can_do_burst32) - esp->prev_hme_dmacsr |= DMA_BRST32; - - if (can_do_sbus64) { - esp->prev_hme_dmacsr |= DMA_SCSI_SBUS64; - sbus_set_sbus64(esp->sdev, esp->bursts); - } - - /* This chip is horrible. */ - while (sbus_readl(esp->dregs + DMA_CSR) & DMA_PEND_READ) - udelay(1); - - sbus_writel(0, esp->dregs + DMA_CSR); - sbus_writel(esp->prev_hme_dmacsr, esp->dregs + DMA_CSR); - - /* This is necessary to avoid having the SCSI channel - * engine lock up on us. - */ - sbus_writel(0, esp->dregs + DMA_ADDR); - - break; - case dvmarev2: - /* This is the gate array found in the sun4m - * NCR SBUS I/O subsystem. - */ - if (esp->erev != esp100) { - tmp = sbus_readl(esp->dregs + DMA_CSR); - sbus_writel(tmp | DMA_3CLKS, esp->dregs + DMA_CSR); - } - break; - case dvmarev3: - tmp = sbus_readl(esp->dregs + DMA_CSR); - tmp &= ~DMA_3CLKS; - tmp |= DMA_2CLKS; - if (can_do_burst32) { - tmp &= ~DMA_BRST_SZ; - tmp |= DMA_BRST32; - } - sbus_writel(tmp, esp->dregs + DMA_CSR); - break; - case dvmaesc1: - /* This is the DMA unit found on SCSI/Ether cards. */ - tmp = sbus_readl(esp->dregs + DMA_CSR); - tmp |= DMA_ADD_ENABLE; - tmp &= ~DMA_BCNT_ENAB; - if (!can_do_burst32 && can_do_burst16) { - tmp |= DMA_ESC_BURST; - } else { - tmp &= ~(DMA_ESC_BURST); - } - sbus_writel(tmp, esp->dregs + DMA_CSR); - break; - default: - break; - }; - ESP_INTSON(esp->dregs); -} - -/* Reset the ESP chip, _not_ the SCSI bus. */ -static void __init esp_reset_esp(struct esp *esp) -{ - u8 family_code, version; - int i; - - /* Now reset the ESP chip */ - esp_cmd(esp, ESP_CMD_RC); - esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA); - esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA); - - /* Reload the configuration registers */ - sbus_writeb(esp->cfact, esp->eregs + ESP_CFACT); - esp->prev_stp = 0; - sbus_writeb(esp->prev_stp, esp->eregs + ESP_STP); - esp->prev_soff = 0; - sbus_writeb(esp->prev_soff, esp->eregs + ESP_SOFF); - sbus_writeb(esp->neg_defp, esp->eregs + ESP_TIMEO); - - /* This is the only point at which it is reliable to read - * the ID-code for a fast ESP chip variants. - */ - esp->max_period = ((35 * esp->ccycle) / 1000); - if (esp->erev == fast) { - version = sbus_readb(esp->eregs + ESP_UID); - family_code = (version & 0xf8) >> 3; - if (family_code == 0x02) - esp->erev = fas236; - else if (family_code == 0x0a) - esp->erev = fashme; /* Version is usually '5'. */ - else - esp->erev = fas100a; - ESPMISC(("esp%d: FAST chip is %s (family=%d, version=%d)\n", - esp->esp_id, - (esp->erev == fas236) ? "fas236" : - ((esp->erev == fas100a) ? "fas100a" : - "fasHME"), family_code, (version & 7))); - - esp->min_period = ((4 * esp->ccycle) / 1000); - } else { - esp->min_period = ((5 * esp->ccycle) / 1000); - } - esp->max_period = (esp->max_period + 3)>>2; - esp->min_period = (esp->min_period + 3)>>2; - - sbus_writeb(esp->config1, esp->eregs + ESP_CFG1); - switch (esp->erev) { - case esp100: - /* nothing to do */ - break; - case esp100a: - sbus_writeb(esp->config2, esp->eregs + ESP_CFG2); - break; - case esp236: - /* Slow 236 */ - sbus_writeb(esp->config2, esp->eregs + ESP_CFG2); - esp->prev_cfg3 = esp->config3[0]; - sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3); - break; - case fashme: - esp->config2 |= (ESP_CONFIG2_HME32 | ESP_CONFIG2_HMEFENAB); - /* fallthrough... */ - case fas236: - /* Fast 236 or HME */ - sbus_writeb(esp->config2, esp->eregs + ESP_CFG2); - for (i = 0; i < 16; i++) { - if (esp->erev == fashme) { - u8 cfg3; - - cfg3 = ESP_CONFIG3_FCLOCK | ESP_CONFIG3_OBPUSH; - if (esp->scsi_id >= 8) - cfg3 |= ESP_CONFIG3_IDBIT3; - esp->config3[i] |= cfg3; - } else { - esp->config3[i] |= ESP_CONFIG3_FCLK; - } - } - esp->prev_cfg3 = esp->config3[0]; - sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3); - if (esp->erev == fashme) { - esp->radelay = 80; - } else { - if (esp->diff) - esp->radelay = 0; - else - esp->radelay = 96; - } - break; - case fas100a: - /* Fast 100a */ - sbus_writeb(esp->config2, esp->eregs + ESP_CFG2); - for (i = 0; i < 16; i++) - esp->config3[i] |= ESP_CONFIG3_FCLOCK; - esp->prev_cfg3 = esp->config3[0]; - sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3); - esp->radelay = 32; - break; - default: - panic("esp: what could it be... I wonder..."); - break; - }; - - /* Eat any bitrot in the chip */ - sbus_readb(esp->eregs + ESP_INTRPT); - udelay(100); -} - -/* This places the ESP into a known state at boot time. */ -static void __init esp_bootup_reset(struct esp *esp) -{ - u8 tmp; - - /* Reset the DMA */ - esp_reset_dma(esp); - - /* Reset the ESP */ - esp_reset_esp(esp); - - /* Reset the SCSI bus, but tell ESP not to generate an irq */ - tmp = sbus_readb(esp->eregs + ESP_CFG1); - tmp |= ESP_CONFIG1_SRRDISAB; - sbus_writeb(tmp, esp->eregs + ESP_CFG1); - - esp_cmd(esp, ESP_CMD_RS); - udelay(400); - - sbus_writeb(esp->config1, esp->eregs + ESP_CFG1); - - /* Eat any bitrot in the chip and we are done... */ - sbus_readb(esp->eregs + ESP_INTRPT); -} - -static int __init esp_find_dvma(struct esp *esp, struct sbus_dev *dma_sdev) -{ - struct sbus_dev *sdev = esp->sdev; - struct sbus_dma *dma; - - if (dma_sdev != NULL) { - for_each_dvma(dma) { - if (dma->sdev == dma_sdev) - break; - } - } else { - for_each_dvma(dma) { - /* If allocated already, can't use it. */ - if (dma->allocated) - continue; - - if (dma->sdev == NULL) - break; - - /* If bus + slot are the same and it has the - * correct OBP name, it's ours. - */ - if (sdev->bus == dma->sdev->bus && - sdev->slot == dma->sdev->slot && - (!strcmp(dma->sdev->prom_name, "dma") || - !strcmp(dma->sdev->prom_name, "espdma"))) - break; - } - } - - /* If we don't know how to handle the dvma, - * do not use this device. - */ - if (dma == NULL) { - printk("Cannot find dvma for ESP%d's SCSI\n", esp->esp_id); - return -1; - } - if (dma->allocated) { - printk("esp%d: can't use my espdma\n", esp->esp_id); - return -1; - } - dma->allocated = 1; - esp->dma = dma; - esp->dregs = dma->regs; - - return 0; -} - -static int __init esp_map_regs(struct esp *esp, int hme) -{ - struct sbus_dev *sdev = esp->sdev; - struct resource *res; - - /* On HME, two reg sets exist, first is DVMA, - * second is ESP registers. - */ - if (hme) - res = &sdev->resource[1]; - else - res = &sdev->resource[0]; - - esp->eregs = sbus_ioremap(res, 0, ESP_REG_SIZE, "ESP Registers"); - - if (esp->eregs == 0) - return -1; - return 0; -} - -static int __init esp_map_cmdarea(struct esp *esp) -{ - struct sbus_dev *sdev = esp->sdev; - - esp->esp_command = sbus_alloc_consistent(sdev, 16, - &esp->esp_command_dvma); - if (esp->esp_command == NULL || - esp->esp_command_dvma == 0) - return -1; - return 0; -} - -static int __init esp_register_irq(struct esp *esp) -{ - esp->ehost->irq = esp->irq = esp->sdev->irqs[0]; - - /* We used to try various overly-clever things to - * reduce the interrupt processing overhead on - * sun4c/sun4m when multiple ESP's shared the - * same IRQ. It was too complex and messy to - * sanely maintain. - */ - if (request_irq(esp->ehost->irq, esp_intr, - IRQF_SHARED, "ESP SCSI", esp)) { - printk("esp%d: Cannot acquire irq line\n", - esp->esp_id); - return -1; - } - - printk("esp%d: IRQ %d ", esp->esp_id, - esp->ehost->irq); - - return 0; -} - -static void __init esp_get_scsi_id(struct esp *esp) -{ - struct sbus_dev *sdev = esp->sdev; - struct device_node *dp = sdev->ofdev.node; - - esp->scsi_id = of_getintprop_default(dp, - "initiator-id", - -1); - if (esp->scsi_id == -1) - esp->scsi_id = of_getintprop_default(dp, - "scsi-initiator-id", - -1); - if (esp->scsi_id == -1) - esp->scsi_id = (sdev->bus == NULL) ? 7 : - of_getintprop_default(sdev->bus->ofdev.node, - "scsi-initiator-id", - 7); - esp->ehost->this_id = esp->scsi_id; - esp->scsi_id_mask = (1 << esp->scsi_id); - -} - -static void __init esp_get_clock_params(struct esp *esp) -{ - struct sbus_dev *sdev = esp->sdev; - int prom_node = esp->prom_node; - int sbus_prom_node; - unsigned int fmhz; - u8 ccf; - - if (sdev != NULL && sdev->bus != NULL) - sbus_prom_node = sdev->bus->prom_node; - else - sbus_prom_node = 0; - - /* This is getting messy but it has to be done - * correctly or else you get weird behavior all - * over the place. We are trying to basically - * figure out three pieces of information. - * - * a) Clock Conversion Factor - * - * This is a representation of the input - * crystal clock frequency going into the - * ESP on this machine. Any operation whose - * timing is longer than 400ns depends on this - * value being correct. For example, you'll - * get blips for arbitration/selection during - * high load or with multiple targets if this - * is not set correctly. - * - * b) Selection Time-Out - * - * The ESP isn't very bright and will arbitrate - * for the bus and try to select a target - * forever if you let it. This value tells - * the ESP when it has taken too long to - * negotiate and that it should interrupt - * the CPU so we can see what happened. - * The value is computed as follows (from - * NCR/Symbios chip docs). - * - * (Time Out Period) * (Input Clock) - * STO = ---------------------------------- - * (8192) * (Clock Conversion Factor) - * - * You usually want the time out period to be - * around 250ms, I think we'll set it a little - * bit higher to account for fully loaded SCSI - * bus's and slow devices that don't respond so - * quickly to selection attempts. (yeah, I know - * this is out of spec. but there is a lot of - * buggy pieces of firmware out there so bite me) - * - * c) Imperical constants for synchronous offset - * and transfer period register values - * - * This entails the smallest and largest sync - * period we could ever handle on this ESP. - */ - - fmhz = prom_getintdefault(prom_node, "clock-frequency", -1); - if (fmhz == -1) - fmhz = (!sbus_prom_node) ? 0 : - prom_getintdefault(sbus_prom_node, "clock-frequency", -1); - - if (fmhz <= (5000000)) - ccf = 0; - else - ccf = (((5000000 - 1) + (fmhz))/(5000000)); - - if (!ccf || ccf > 8) { - /* If we can't find anything reasonable, - * just assume 20MHZ. This is the clock - * frequency of the older sun4c's where I've - * been unable to find the clock-frequency - * PROM property. All other machines provide - * useful values it seems. - */ - ccf = ESP_CCF_F4; - fmhz = (20000000); - } - - if (ccf == (ESP_CCF_F7 + 1)) - esp->cfact = ESP_CCF_F0; - else if (ccf == ESP_CCF_NEVER) - esp->cfact = ESP_CCF_F2; - else - esp->cfact = ccf; - esp->raw_cfact = ccf; - - esp->cfreq = fmhz; - esp->ccycle = ESP_MHZ_TO_CYCLE(fmhz); - esp->ctick = ESP_TICK(ccf, esp->ccycle); - esp->neg_defp = ESP_NEG_DEFP(fmhz, ccf); - esp->sync_defp = SYNC_DEFP_SLOW; - - printk("SCSI ID %d Clk %dMHz CCYC=%d CCF=%d TOut %d ", - esp->scsi_id, (fmhz / 1000000), - (int)esp->ccycle, (int)ccf, (int) esp->neg_defp); -} - -static void __init esp_get_bursts(struct esp *esp, struct sbus_dev *dma) -{ - struct sbus_dev *sdev = esp->sdev; - u8 bursts; - - bursts = prom_getintdefault(esp->prom_node, "burst-sizes", 0xff); - - if (dma) { - u8 tmp = prom_getintdefault(dma->prom_node, - "burst-sizes", 0xff); - if (tmp != 0xff) - bursts &= tmp; - } - - if (sdev->bus) { - u8 tmp = prom_getintdefault(sdev->bus->prom_node, - "burst-sizes", 0xff); - if (tmp != 0xff) - bursts &= tmp; - } - - if (bursts == 0xff || - (bursts & DMA_BURST16) == 0 || - (bursts & DMA_BURST32) == 0) - bursts = (DMA_BURST32 - 1); - - esp->bursts = bursts; -} - -static void __init esp_get_revision(struct esp *esp) -{ - u8 tmp; - - esp->config1 = (ESP_CONFIG1_PENABLE | (esp->scsi_id & 7)); - esp->config2 = (ESP_CONFIG2_SCSI2ENAB | ESP_CONFIG2_REGPARITY); - sbus_writeb(esp->config2, esp->eregs + ESP_CFG2); - - tmp = sbus_readb(esp->eregs + ESP_CFG2); - tmp &= ~ESP_CONFIG2_MAGIC; - if (tmp != (ESP_CONFIG2_SCSI2ENAB | ESP_CONFIG2_REGPARITY)) { - /* If what we write to cfg2 does not come back, cfg2 - * is not implemented, therefore this must be a plain - * esp100. - */ - esp->erev = esp100; - printk("NCR53C90(esp100)\n"); - } else { - esp->config2 = 0; - esp->prev_cfg3 = esp->config3[0] = 5; - sbus_writeb(esp->config2, esp->eregs + ESP_CFG2); - sbus_writeb(0, esp->eregs + ESP_CFG3); - sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3); - - tmp = sbus_readb(esp->eregs + ESP_CFG3); - if (tmp != 5) { - /* The cfg2 register is implemented, however - * cfg3 is not, must be esp100a. - */ - esp->erev = esp100a; - printk("NCR53C90A(esp100a)\n"); - } else { - int target; - - for (target = 0; target < 16; target++) - esp->config3[target] = 0; - esp->prev_cfg3 = 0; - sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3); - - /* All of cfg{1,2,3} implemented, must be one of - * the fas variants, figure out which one. - */ - if (esp->raw_cfact > ESP_CCF_F5) { - esp->erev = fast; - esp->sync_defp = SYNC_DEFP_FAST; - printk("NCR53C9XF(espfast)\n"); - } else { - esp->erev = esp236; - printk("NCR53C9x(esp236)\n"); - } - esp->config2 = 0; - sbus_writeb(esp->config2, esp->eregs + ESP_CFG2); - } - } -} - -static void __init esp_init_swstate(struct esp *esp) -{ - int i; - - /* Command queues... */ - esp->current_SC = NULL; - esp->disconnected_SC = NULL; - esp->issue_SC = NULL; - - /* Target and current command state... */ - esp->targets_present = 0; - esp->resetting_bus = 0; - esp->snip = 0; - - init_waitqueue_head(&esp->reset_queue); - - /* Debugging... */ - for(i = 0; i < 32; i++) - esp->espcmdlog[i] = 0; - esp->espcmdent = 0; - - /* MSG phase state... */ - for(i = 0; i < 16; i++) { - esp->cur_msgout[i] = 0; - esp->cur_msgin[i] = 0; - } - esp->prevmsgout = esp->prevmsgin = 0; - esp->msgout_len = esp->msgin_len = 0; - - /* Clear the one behind caches to hold unmatchable values. */ - esp->prev_soff = esp->prev_stp = esp->prev_cfg3 = 0xff; - esp->prev_hme_dmacsr = 0xffffffff; -} - -static int __init detect_one_esp(struct scsi_host_template *tpnt, - struct device *dev, - struct sbus_dev *esp_dev, - struct sbus_dev *espdma, - struct sbus_bus *sbus, - int hme) -{ - static int instance; - struct Scsi_Host *esp_host = scsi_host_alloc(tpnt, sizeof(struct esp)); - struct esp *esp; - - if (!esp_host) - return -ENOMEM; - - if (hme) - esp_host->max_id = 16; - esp = (struct esp *) esp_host->hostdata; - esp->ehost = esp_host; - esp->sdev = esp_dev; - esp->esp_id = instance; - esp->prom_node = esp_dev->prom_node; - prom_getstring(esp->prom_node, "name", esp->prom_name, - sizeof(esp->prom_name)); - - if (esp_find_dvma(esp, espdma) < 0) - goto fail_unlink; - if (esp_map_regs(esp, hme) < 0) { - printk("ESP registers unmappable"); - goto fail_dvma_release; - } - if (esp_map_cmdarea(esp) < 0) { - printk("ESP DVMA transport area unmappable"); - goto fail_unmap_regs; - } - if (esp_register_irq(esp) < 0) - goto fail_unmap_cmdarea; - - esp_get_scsi_id(esp); - - esp->diff = prom_getbool(esp->prom_node, "differential"); - if (esp->diff) - printk("Differential "); - - esp_get_clock_params(esp); - esp_get_bursts(esp, espdma); - esp_get_revision(esp); - esp_init_swstate(esp); - - esp_bootup_reset(esp); - - if (scsi_add_host(esp_host, dev)) - goto fail_free_irq; - - dev_set_drvdata(&esp_dev->ofdev.dev, esp); - - scsi_scan_host(esp_host); - instance++; - - return 0; - -fail_free_irq: - free_irq(esp->ehost->irq, esp); - -fail_unmap_cmdarea: - sbus_free_consistent(esp->sdev, 16, - (void *) esp->esp_command, - esp->esp_command_dvma); - -fail_unmap_regs: - sbus_iounmap(esp->eregs, ESP_REG_SIZE); - -fail_dvma_release: - esp->dma->allocated = 0; - -fail_unlink: - scsi_host_put(esp_host); - return -1; -} - -/* Detecting ESP chips on the machine. This is the simple and easy - * version. - */ -static int __devexit esp_remove_common(struct esp *esp) -{ - unsigned int irq = esp->ehost->irq; - - scsi_remove_host(esp->ehost); - - ESP_INTSOFF(esp->dregs); -#if 0 - esp_reset_dma(esp); - esp_reset_esp(esp); -#endif - - free_irq(irq, esp); - sbus_free_consistent(esp->sdev, 16, - (void *) esp->esp_command, esp->esp_command_dvma); - sbus_iounmap(esp->eregs, ESP_REG_SIZE); - esp->dma->allocated = 0; - - scsi_host_put(esp->ehost); - - return 0; -} - - -#ifdef CONFIG_SUN4 - -#include <asm/sun4paddr.h> - -static struct sbus_dev sun4_esp_dev; - -static int __init esp_sun4_probe(struct scsi_host_template *tpnt) -{ - if (sun4_esp_physaddr) { - memset(&sun4_esp_dev, 0, sizeof(sun4_esp_dev)); - sun4_esp_dev.reg_addrs[0].phys_addr = sun4_esp_physaddr; - sun4_esp_dev.irqs[0] = 4; - sun4_esp_dev.resource[0].start = sun4_esp_physaddr; - sun4_esp_dev.resource[0].end = - sun4_esp_physaddr + ESP_REG_SIZE - 1; - sun4_esp_dev.resource[0].flags = IORESOURCE_IO; - - return detect_one_esp(tpnt, NULL, - &sun4_esp_dev, NULL, NULL, 0); - } - return 0; -} - -static int __devexit esp_sun4_remove(void) -{ - struct of_device *dev = &sun4_esp_dev.ofdev; - struct esp *esp = dev_get_drvdata(&dev->dev); - - return esp_remove_common(esp); -} - -#else /* !CONFIG_SUN4 */ - -static int __devinit esp_sbus_probe(struct of_device *dev, const struct of_device_id *match) -{ - struct sbus_dev *sdev = to_sbus_device(&dev->dev); - struct device_node *dp = dev->node; - struct sbus_dev *dma_sdev = NULL; - int hme = 0; - - if (dp->parent && - (!strcmp(dp->parent->name, "espdma") || - !strcmp(dp->parent->name, "dma"))) - dma_sdev = sdev->parent; - else if (!strcmp(dp->name, "SUNW,fas")) { - dma_sdev = sdev; - hme = 1; - } - - return detect_one_esp(match->data, &dev->dev, - sdev, dma_sdev, sdev->bus, hme); -} - -static int __devexit esp_sbus_remove(struct of_device *dev) -{ - struct esp *esp = dev_get_drvdata(&dev->dev); - - return esp_remove_common(esp); -} - -#endif /* !CONFIG_SUN4 */ - -/* The info function will return whatever useful - * information the developer sees fit. If not provided, then - * the name field will be used instead. - */ -static const char *esp_info(struct Scsi_Host *host) -{ - struct esp *esp; - - esp = (struct esp *) host->hostdata; - switch (esp->erev) { - case esp100: - return "Sparc ESP100 (NCR53C90)"; - case esp100a: - return "Sparc ESP100A (NCR53C90A)"; - case esp236: - return "Sparc ESP236"; - case fas236: - return "Sparc ESP236-FAST"; - case fashme: - return "Sparc ESP366-HME"; - case fas100a: - return "Sparc ESP100A-FAST"; - default: - return "Bogon ESP revision"; - }; -} - -/* From Wolfgang Stanglmeier's NCR scsi driver. */ -struct info_str -{ - char *buffer; - int length; - int offset; - int pos; -}; - -static void copy_mem_info(struct info_str *info, char *data, int len) -{ - if (info->pos + len > info->length) - len = info->length - info->pos; - - if (info->pos + len < info->offset) { - info->pos += len; - return; - } - if (info->pos < info->offset) { - data += (info->offset - info->pos); - len -= (info->offset - info->pos); - } - - if (len > 0) { - memcpy(info->buffer + info->pos, data, len); - info->pos += len; - } -} - -static int copy_info(struct info_str *info, char *fmt, ...) -{ - va_list args; - char buf[81]; - int len; - - va_start(args, fmt); - len = vsprintf(buf, fmt, args); - va_end(args); - - copy_mem_info(info, buf, len); - return len; -} - -static int esp_host_info(struct esp *esp, char *ptr, off_t offset, int len) -{ - struct scsi_device *sdev; - struct info_str info; - int i; - - info.buffer = ptr; - info.length = len; - info.offset = offset; - info.pos = 0; - - copy_info(&info, "Sparc ESP Host Adapter:\n"); - copy_info(&info, "\tPROM node\t\t%08x\n", (unsigned int) esp->prom_node); - copy_info(&info, "\tPROM name\t\t%s\n", esp->prom_name); - copy_info(&info, "\tESP Model\t\t"); - switch (esp->erev) { - case esp100: - copy_info(&info, "ESP100\n"); - break; - case esp100a: - copy_info(&info, "ESP100A\n"); - break; - case esp236: - copy_info(&info, "ESP236\n"); - break; - case fas236: - copy_info(&info, "FAS236\n"); - break; - case fas100a: - copy_info(&info, "FAS100A\n"); - break; - case fast: - copy_info(&info, "FAST\n"); - break; - case fashme: - copy_info(&info, "Happy Meal FAS\n"); - break; - case espunknown: - default: - copy_info(&info, "Unknown!\n"); - break; - }; - copy_info(&info, "\tDMA Revision\t\t"); - switch (esp->dma->revision) { - case dvmarev0: - copy_info(&info, "Rev 0\n"); - break; - case dvmaesc1: - copy_info(&info, "ESC Rev 1\n"); - break; - case dvmarev1: - copy_info(&info, "Rev 1\n"); - break; - case dvmarev2: - copy_info(&info, "Rev 2\n"); - break; - case dvmarev3: - copy_info(&info, "Rev 3\n"); - break; - case dvmarevplus: - copy_info(&info, "Rev 1+\n"); - break; - case dvmahme: - copy_info(&info, "Rev HME/FAS\n"); - break; - default: - copy_info(&info, "Unknown!\n"); - break; - }; - copy_info(&info, "\tLive Targets\t\t[ "); - for (i = 0; i < 15; i++) { - if (esp->targets_present & (1 << i)) - copy_info(&info, "%d ", i); - } - copy_info(&info, "]\n\n"); - - /* Now describe the state of each existing target. */ - copy_info(&info, "Target #\tconfig3\t\tSync Capabilities\tDisconnect\tWide\n"); - - shost_for_each_device(sdev, esp->ehost) { - struct esp_device *esp_dev = sdev->hostdata; - uint id = sdev->id; - - if (!(esp->targets_present & (1 << id))) - continue; - - copy_info(&info, "%d\t\t", id); - copy_info(&info, "%08lx\t", esp->config3[id]); - copy_info(&info, "[%02lx,%02lx]\t\t\t", - esp_dev->sync_max_offset, - esp_dev->sync_min_period); - copy_info(&info, "%s\t\t", - esp_dev->disconnect ? "yes" : "no"); - copy_info(&info, "%s\n", - (esp->config3[id] & ESP_CONFIG3_EWIDE) ? "yes" : "no"); - } - return info.pos > info.offset? info.pos - info.offset : 0; -} - -/* ESP proc filesystem code. */ -static int esp_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, - int length, int inout) -{ - struct esp *esp = (struct esp *) host->hostdata; - - if (inout) - return -EINVAL; /* not yet */ - - if (start) - *start = buffer; - - return esp_host_info(esp, buffer, offset, length); -} - -static void esp_get_dmabufs(struct esp *esp, struct scsi_cmnd *sp) -{ - if (sp->use_sg == 0) { - sp->SCp.this_residual = sp->request_bufflen; - sp->SCp.buffer = (struct scatterlist *) sp->request_buffer; - sp->SCp.buffers_residual = 0; - if (sp->request_bufflen) { - sp->SCp.have_data_in = sbus_map_single(esp->sdev, sp->SCp.buffer, - sp->SCp.this_residual, - sp->sc_data_direction); - sp->SCp.ptr = (char *) ((unsigned long)sp->SCp.have_data_in); - } else { - sp->SCp.ptr = NULL; - } - } else { - sp->SCp.buffer = (struct scatterlist *) sp->request_buffer; - sp->SCp.buffers_residual = sbus_map_sg(esp->sdev, - sp->SCp.buffer, - sp->use_sg, - sp->sc_data_direction); - sp->SCp.this_residual = sg_dma_len(sp->SCp.buffer); - sp->SCp.ptr = (char *) ((unsigned long)sg_dma_address(sp->SCp.buffer)); - } -} - -static void esp_release_dmabufs(struct esp *esp, struct scsi_cmnd *sp) -{ - if (sp->use_sg) { - sbus_unmap_sg(esp->sdev, sp->request_buffer, sp->use_sg, - sp->sc_data_direction); - } else if (sp->request_bufflen) { - sbus_unmap_single(esp->sdev, - sp->SCp.have_data_in, - sp->request_bufflen, - sp->sc_data_direction); - } -} - -static void esp_restore_pointers(struct esp *esp, struct scsi_cmnd *sp) -{ - struct esp_pointers *ep = &esp->data_pointers[sp->device->id]; - - sp->SCp.ptr = ep->saved_ptr; - sp->SCp.buffer = ep->saved_buffer; - sp->SCp.this_residual = ep->saved_this_residual; - sp->SCp.buffers_residual = ep->saved_buffers_residual; -} - -static void esp_save_pointers(struct esp *esp, struct scsi_cmnd *sp) -{ - struct esp_pointers *ep = &esp->data_pointers[sp->device->id]; - - ep->saved_ptr = sp->SCp.ptr; - ep->saved_buffer = sp->SCp.buffer; - ep->saved_this_residual = sp->SCp.this_residual; - ep->saved_buffers_residual = sp->SCp.buffers_residual; -} - -/* Some rules: - * - * 1) Never ever panic while something is live on the bus. - * If there is to be any chance of syncing the disks this - * rule is to be obeyed. - * - * 2) Any target that causes a foul condition will no longer - * have synchronous transfers done to it, no questions - * asked. - * - * 3) Keep register accesses to a minimum. Think about some - * day when we have Xbus machines this is running on and - * the ESP chip is on the other end of the machine on a - * different board from the cpu where this is running. - */ - -/* Fire off a command. We assume the bus is free and that the only - * case where we could see an interrupt is where we have disconnected - * commands active and they are trying to reselect us. - */ -static inline void esp_check_cmd(struct esp *esp, struct scsi_cmnd *sp) -{ - switch (sp->cmd_len) { - case 6: - case 10: - case 12: - esp->esp_slowcmd = 0; - break; - - default: - esp->esp_slowcmd = 1; - esp->esp_scmdleft = sp->cmd_len; - esp->esp_scmdp = &sp->cmnd[0]; - break; - }; -} - -static inline void build_sync_nego_msg(struct esp *esp, int period, int offset) -{ - esp->cur_msgout[0] = EXTENDED_MESSAGE; - esp->cur_msgout[1] = 3; - esp->cur_msgout[2] = EXTENDED_SDTR; - esp->cur_msgout[3] = period; - esp->cur_msgout[4] = offset; - esp->msgout_len = 5; -} - -/* SIZE is in bits, currently HME only supports 16 bit wide transfers. */ -static inline void build_wide_nego_msg(struct esp *esp, int size) -{ - esp->cur_msgout[0] = EXTENDED_MESSAGE; - esp->cur_msgout[1] = 2; - esp->cur_msgout[2] = EXTENDED_WDTR; - switch (size) { - case 32: - esp->cur_msgout[3] = 2; - break; - case 16: - esp->cur_msgout[3] = 1; - break; - case 8: - default: - esp->cur_msgout[3] = 0; - break; - }; - - esp->msgout_len = 4; -} - -static void esp_exec_cmd(struct esp *esp) -{ - struct scsi_cmnd *SCptr; - struct scsi_device *SDptr; - struct esp_device *esp_dev; - volatile u8 *cmdp = esp->esp_command; - u8 the_esp_command; - int lun, target; - int i; - - /* Hold off if we have disconnected commands and - * an IRQ is showing... - */ - if (esp->disconnected_SC && ESP_IRQ_P(esp->dregs)) - return; - - /* Grab first member of the issue queue. */ - SCptr = esp->current_SC = remove_first_SC(&esp->issue_SC); - - /* Safe to panic here because current_SC is null. */ - if (!SCptr) - panic("esp: esp_exec_cmd and issue queue is NULL"); - - SDptr = SCptr->device; - esp_dev = SDptr->hostdata; - lun = SCptr->device->lun; - target = SCptr->device->id; - - esp->snip = 0; - esp->msgout_len = 0; - - /* Send it out whole, or piece by piece? The ESP - * only knows how to automatically send out 6, 10, - * and 12 byte commands. I used to think that the - * Linux SCSI code would never throw anything other - * than that to us, but then again there is the - * SCSI generic driver which can send us anything. - */ - esp_check_cmd(esp, SCptr); - - /* If arbitration/selection is successful, the ESP will leave - * ATN asserted, causing the target to go into message out - * phase. The ESP will feed the target the identify and then - * the target can only legally go to one of command, - * datain/out, status, or message in phase, or stay in message - * out phase (should we be trying to send a sync negotiation - * message after the identify). It is not allowed to drop - * BSY, but some buggy targets do and we check for this - * condition in the selection complete code. Most of the time - * we'll make the command bytes available to the ESP and it - * will not interrupt us until it finishes command phase, we - * cannot do this for command sizes the ESP does not - * understand and in this case we'll get interrupted right - * when the target goes into command phase. - * - * It is absolutely _illegal_ in the presence of SCSI-2 devices - * to use the ESP select w/o ATN command. When SCSI-2 devices are - * present on the bus we _must_ always go straight to message out - * phase with an identify message for the target. Being that - * selection attempts in SCSI-1 w/o ATN was an option, doing SCSI-2 - * selections should not confuse SCSI-1 we hope. - */ - - if (esp_dev->sync) { - /* this targets sync is known */ -#ifndef __sparc_v9__ -do_sync_known: -#endif - if (esp_dev->disconnect) - *cmdp++ = IDENTIFY(1, lun); - else - *cmdp++ = IDENTIFY(0, lun); - - if (esp->esp_slowcmd) { - the_esp_command = (ESP_CMD_SELAS | ESP_CMD_DMA); - esp_advance_phase(SCptr, in_slct_stop); - } else { - the_esp_command = (ESP_CMD_SELA | ESP_CMD_DMA); - esp_advance_phase(SCptr, in_slct_norm); - } - } else if (!(esp->targets_present & (1<<target)) || !(esp_dev->disconnect)) { - /* After the bootup SCSI code sends both the - * TEST_UNIT_READY and INQUIRY commands we want - * to at least attempt allowing the device to - * disconnect. - */ - ESPMISC(("esp: Selecting device for first time. target=%d " - "lun=%d\n", target, SCptr->device->lun)); - if (!SDptr->borken && !esp_dev->disconnect) - esp_dev->disconnect = 1; - - *cmdp++ = IDENTIFY(0, lun); - esp->prevmsgout = NOP; - esp_advance_phase(SCptr, in_slct_norm); - the_esp_command = (ESP_CMD_SELA | ESP_CMD_DMA); - - /* Take no chances... */ - esp_dev->sync_max_offset = 0; - esp_dev->sync_min_period = 0; - } else { - /* Sorry, I have had way too many problems with - * various CDROM devices on ESP. -DaveM - */ - int cdrom_hwbug_wkaround = 0; - -#ifndef __sparc_v9__ - /* Never allow disconnects or synchronous transfers on - * SparcStation1 and SparcStation1+. Allowing those - * to be enabled seems to lockup the machine completely. - */ - if ((idprom->id_machtype == (SM_SUN4C | SM_4C_SS1)) || - (idprom->id_machtype == (SM_SUN4C | SM_4C_SS1PLUS))) { - /* But we are nice and allow tapes and removable - * disks (but not CDROMs) to disconnect. - */ - if(SDptr->type == TYPE_TAPE || - (SDptr->type != TYPE_ROM && SDptr->removable)) - esp_dev->disconnect = 1; - else - esp_dev->disconnect = 0; - esp_dev->sync_max_offset = 0; - esp_dev->sync_min_period = 0; - esp_dev->sync = 1; - esp->snip = 0; - goto do_sync_known; - } -#endif /* !(__sparc_v9__) */ - - /* We've talked to this guy before, - * but never negotiated. Let's try, - * need to attempt WIDE first, before - * sync nego, as per SCSI 2 standard. - */ - if (esp->erev == fashme && !esp_dev->wide) { - if (!SDptr->borken && - SDptr->type != TYPE_ROM && - SDptr->removable == 0) { - build_wide_nego_msg(esp, 16); - esp_dev->wide = 1; - esp->wnip = 1; - goto after_nego_msg_built; - } else { - esp_dev->wide = 1; - /* Fall through and try sync. */ - } - } - - if (!SDptr->borken) { - if ((SDptr->type == TYPE_ROM)) { - /* Nice try sucker... */ - ESPMISC(("esp%d: Disabling sync for buggy " - "CDROM.\n", esp->esp_id)); - cdrom_hwbug_wkaround = 1; - build_sync_nego_msg(esp, 0, 0); - } else if (SDptr->removable != 0) { - ESPMISC(("esp%d: Not negotiating sync/wide but " - "allowing disconnect for removable media.\n", - esp->esp_id)); - build_sync_nego_msg(esp, 0, 0); - } else { - build_sync_nego_msg(esp, esp->sync_defp, 15); - } - } else { - build_sync_nego_msg(esp, 0, 0); - } - esp_dev->sync = 1; - esp->snip = 1; - -after_nego_msg_built: - /* A fix for broken SCSI1 targets, when they disconnect - * they lock up the bus and confuse ESP. So disallow - * disconnects for SCSI1 targets for now until we - * find a better fix. - * - * Addendum: This is funny, I figured out what was going - * on. The blotzed SCSI1 target would disconnect, - * one of the other SCSI2 targets or both would be - * disconnected as well. The SCSI1 target would - * stay disconnected long enough that we start - * up a command on one of the SCSI2 targets. As - * the ESP is arbitrating for the bus the SCSI1 - * target begins to arbitrate as well to reselect - * the ESP. The SCSI1 target refuses to drop it's - * ID bit on the data bus even though the ESP is - * at ID 7 and is the obvious winner for any - * arbitration. The ESP is a poor sport and refuses - * to lose arbitration, it will continue indefinitely - * trying to arbitrate for the bus and can only be - * stopped via a chip reset or SCSI bus reset. - * Therefore _no_ disconnects for SCSI1 targets - * thank you very much. ;-) - */ - if(((SDptr->scsi_level < 3) && - (SDptr->type != TYPE_TAPE) && - SDptr->removable == 0) || - cdrom_hwbug_wkaround || SDptr->borken) { - ESPMISC((KERN_INFO "esp%d: Disabling DISCONNECT for target %d " - "lun %d\n", esp->esp_id, SCptr->device->id, SCptr->device->lun)); - esp_dev->disconnect = 0; - *cmdp++ = IDENTIFY(0, lun); - } else { - *cmdp++ = IDENTIFY(1, lun); - } - - /* ESP fifo is only so big... - * Make this look like a slow command. - */ - esp->esp_slowcmd = 1; - esp->esp_scmdleft = SCptr->cmd_len; - esp->esp_scmdp = &SCptr->cmnd[0]; - - the_esp_command = (ESP_CMD_SELAS | ESP_CMD_DMA); - esp_advance_phase(SCptr, in_slct_msg); - } - - if (!esp->esp_slowcmd) - for (i = 0; i < SCptr->cmd_len; i++) - *cmdp++ = SCptr->cmnd[i]; - - /* HME sucks... */ - if (esp->erev == fashme) - sbus_writeb((target & 0xf) | (ESP_BUSID_RESELID | ESP_BUSID_CTR32BIT), - esp->eregs + ESP_BUSID); - else - sbus_writeb(target & 7, esp->eregs + ESP_BUSID); - if (esp->prev_soff != esp_dev->sync_max_offset || - esp->prev_stp != esp_dev->sync_min_period || - (esp->erev > esp100a && - esp->prev_cfg3 != esp->config3[target])) { - esp->prev_soff = esp_dev->sync_max_offset; - esp->prev_stp = esp_dev->sync_min_period; - sbus_writeb(esp->prev_soff, esp->eregs + ESP_SOFF); - sbus_writeb(esp->prev_stp, esp->eregs + ESP_STP); - if (esp->erev > esp100a) { - esp->prev_cfg3 = esp->config3[target]; - sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3); - } - } - i = (cmdp - esp->esp_command); - - if (esp->erev == fashme) { - esp_cmd(esp, ESP_CMD_FLUSH); /* Grrr! */ - - /* Set up the DMA and HME counters */ - sbus_writeb(i, esp->eregs + ESP_TCLOW); - sbus_writeb(0, esp->eregs + ESP_TCMED); - sbus_writeb(0, esp->eregs + FAS_RLO); - sbus_writeb(0, esp->eregs + FAS_RHI); - esp_cmd(esp, the_esp_command); - - /* Talk about touchy hardware... */ - esp->prev_hme_dmacsr = ((esp->prev_hme_dmacsr | - (DMA_SCSI_DISAB | DMA_ENABLE)) & - ~(DMA_ST_WRITE)); - sbus_writel(16, esp->dregs + DMA_COUNT); - sbus_writel(esp->esp_command_dvma, esp->dregs + DMA_ADDR); - sbus_writel(esp->prev_hme_dmacsr, esp->dregs + DMA_CSR); - } else { - u32 tmp; - - /* Set up the DMA and ESP counters */ - sbus_writeb(i, esp->eregs + ESP_TCLOW); - sbus_writeb(0, esp->eregs + ESP_TCMED); - tmp = sbus_readl(esp->dregs + DMA_CSR); - tmp &= ~DMA_ST_WRITE; - tmp |= DMA_ENABLE; - sbus_writel(tmp, esp->dregs + DMA_CSR); - if (esp->dma->revision == dvmaesc1) { - if (i) /* Workaround ESC gate array SBUS rerun bug. */ - sbus_writel(PAGE_SIZE, esp->dregs + DMA_COUNT); - } - sbus_writel(esp->esp_command_dvma, esp->dregs + DMA_ADDR); - - /* Tell ESP to "go". */ - esp_cmd(esp, the_esp_command); - } -} - -/* Queue a SCSI command delivered from the mid-level Linux SCSI code. */ -static int esp_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *)) -{ - struct esp *esp; - - /* Set up func ptr and initial driver cmd-phase. */ - SCpnt->scsi_done = done; - SCpnt->SCp.phase = not_issued; - - /* We use the scratch area. */ - ESPQUEUE(("esp_queue: target=%d lun=%d ", SCpnt->device->id, SCpnt->device->lun)); - ESPDISC(("N<%02x,%02x>", SCpnt->device->id, SCpnt->device->lun)); - - esp = (struct esp *) SCpnt->device->host->hostdata; - esp_get_dmabufs(esp, SCpnt); - esp_save_pointers(esp, SCpnt); /* FIXME for tag queueing */ - - SCpnt->SCp.Status = CHECK_CONDITION; - SCpnt->SCp.Message = 0xff; - SCpnt->SCp.sent_command = 0; - - /* Place into our queue. */ - if (SCpnt->cmnd[0] == REQUEST_SENSE) { - ESPQUEUE(("RQSENSE\n")); - prepend_SC(&esp->issue_SC, SCpnt); - } else { - ESPQUEUE(("\n")); - append_SC(&esp->issue_SC, SCpnt); - } - - /* Run it now if we can. */ - if (!esp->current_SC && !esp->resetting_bus) - esp_exec_cmd(esp); - - return 0; -} - -/* Dump driver state. */ -static void esp_dump_cmd(struct scsi_cmnd *SCptr) -{ - ESPLOG(("[tgt<%02x> lun<%02x> " - "pphase<%s> cphase<%s>]", - SCptr->device->id, SCptr->device->lun, - phase_string(SCptr->SCp.sent_command), - phase_string(SCptr->SCp.phase))); -} - -static void esp_dump_state(struct esp *esp) -{ - struct scsi_cmnd *SCptr = esp->current_SC; -#ifdef DEBUG_ESP_CMDS - int i; -#endif - - ESPLOG(("esp%d: dumping state\n", esp->esp_id)); - ESPLOG(("esp%d: dma -- cond_reg<%08x> addr<%08x>\n", - esp->esp_id, - sbus_readl(esp->dregs + DMA_CSR), - sbus_readl(esp->dregs + DMA_ADDR))); - ESPLOG(("esp%d: SW [sreg<%02x> sstep<%02x> ireg<%02x>]\n", - esp->esp_id, esp->sreg, esp->seqreg, esp->ireg)); - ESPLOG(("esp%d: HW reread [sreg<%02x> sstep<%02x> ireg<%02x>]\n", - esp->esp_id, - sbus_readb(esp->eregs + ESP_STATUS), - sbus_readb(esp->eregs + ESP_SSTEP), - sbus_readb(esp->eregs + ESP_INTRPT))); -#ifdef DEBUG_ESP_CMDS - printk("esp%d: last ESP cmds [", esp->esp_id); - i = (esp->espcmdent - 1) & 31; - printk("<"); esp_print_cmd(esp->espcmdlog[i]); printk(">"); - i = (i - 1) & 31; - printk("<"); esp_print_cmd(esp->espcmdlog[i]); printk(">"); - i = (i - 1) & 31; - printk("<"); esp_print_cmd(esp->espcmdlog[i]); printk(">"); - i = (i - 1) & 31; - printk("<"); esp_print_cmd(esp->espcmdlog[i]); printk(">"); - printk("]\n"); -#endif /* (DEBUG_ESP_CMDS) */ - - if (SCptr) { - ESPLOG(("esp%d: current command ", esp->esp_id)); - esp_dump_cmd(SCptr); - } - ESPLOG(("\n")); - SCptr = esp->disconnected_SC; - ESPLOG(("esp%d: disconnected ", esp->esp_id)); - while (SCptr) { - esp_dump_cmd(SCptr); - SCptr = (struct scsi_cmnd *) SCptr->host_scribble; - } - ESPLOG(("\n")); -} - -/* Abort a command. The host_lock is acquired by caller. */ -static int esp_abort(struct scsi_cmnd *SCptr) -{ - struct esp *esp = (struct esp *) SCptr->device->host->hostdata; - int don; - - ESPLOG(("esp%d: Aborting command\n", esp->esp_id)); - esp_dump_state(esp); - - /* Wheee, if this is the current command on the bus, the - * best we can do is assert ATN and wait for msgout phase. - * This should even fix a hung SCSI bus when we lose state - * in the driver and timeout because the eventual phase change - * will cause the ESP to (eventually) give an interrupt. - */ - if (esp->current_SC == SCptr) { - esp->cur_msgout[0] = ABORT; - esp->msgout_len = 1; - esp->msgout_ctr = 0; - esp_cmd(esp, ESP_CMD_SATN); - return SUCCESS; - } - - /* If it is still in the issue queue then we can safely - * call the completion routine and report abort success. - */ - don = (sbus_readl(esp->dregs + DMA_CSR) & DMA_INT_ENAB); - if (don) { - ESP_INTSOFF(esp->dregs); - } - if (esp->issue_SC) { - struct scsi_cmnd **prev, *this; - for (prev = (&esp->issue_SC), this = esp->issue_SC; - this != NULL; - prev = (struct scsi_cmnd **) &(this->host_scribble), - this = (struct scsi_cmnd *) this->host_scribble) { - - if (this == SCptr) { - *prev = (struct scsi_cmnd *) this->host_scribble; - this->host_scribble = NULL; - - esp_release_dmabufs(esp, this); - this->result = DID_ABORT << 16; - this->scsi_done(this); - - if (don) - ESP_INTSON(esp->dregs); - - return SUCCESS; - } - } - } - - /* Yuck, the command to abort is disconnected, it is not - * worth trying to abort it now if something else is live - * on the bus at this time. So, we let the SCSI code wait - * a little bit and try again later. - */ - if (esp->current_SC) { - if (don) - ESP_INTSON(esp->dregs); - return FAILED; - } - - /* It's disconnected, we have to reconnect to re-establish - * the nexus and tell the device to abort. However, we really - * cannot 'reconnect' per se. Don't try to be fancy, just - * indicate failure, which causes our caller to reset the whole - * bus. - */ - - if (don) - ESP_INTSON(esp->dregs); - - return FAILED; -} - -/* We've sent ESP_CMD_RS to the ESP, the interrupt had just - * arrived indicating the end of the SCSI bus reset. Our job - * is to clean out the command queues and begin re-execution - * of SCSI commands once more. - */ -static int esp_finish_reset(struct esp *esp) -{ - struct scsi_cmnd *sp = esp->current_SC; - - /* Clean up currently executing command, if any. */ - if (sp != NULL) { - esp->current_SC = NULL; - - esp_release_dmabufs(esp, sp); - sp->result = (DID_RESET << 16); - - sp->scsi_done(sp); - } - - /* Clean up disconnected queue, they have been invalidated - * by the bus reset. - */ - if (esp->disconnected_SC) { - while ((sp = remove_first_SC(&esp->disconnected_SC)) != NULL) { - esp_release_dmabufs(esp, sp); - sp->result = (DID_RESET << 16); - - sp->scsi_done(sp); - } - } - - /* SCSI bus reset is complete. */ - esp->resetting_bus = 0; - wake_up(&esp->reset_queue); - - /* Ok, now it is safe to get commands going once more. */ - if (esp->issue_SC) - esp_exec_cmd(esp); - - return do_intr_end; -} - -static int esp_do_resetbus(struct esp *esp) -{ - ESPLOG(("esp%d: Resetting scsi bus\n", esp->esp_id)); - esp->resetting_bus = 1; - esp_cmd(esp, ESP_CMD_RS); - - return do_intr_end; -} - -/* Reset ESP chip, reset hanging bus, then kill active and - * disconnected commands for targets without soft reset. - * - * The host_lock is acquired by caller. - */ -static int esp_reset(struct scsi_cmnd *SCptr) -{ - struct esp *esp = (struct esp *) SCptr->device->host->hostdata; - - spin_lock_irq(esp->ehost->host_lock); - (void) esp_do_resetbus(esp); - spin_unlock_irq(esp->ehost->host_lock); - - wait_event(esp->reset_queue, (esp->resetting_bus == 0)); - - return SUCCESS; -} - -/* Internal ESP done function. */ -static void esp_done(struct esp *esp, int error) -{ - struct scsi_cmnd *done_SC = esp->current_SC; - - esp->current_SC = NULL; - - esp_release_dmabufs(esp, done_SC); - done_SC->result = error; - - done_SC->scsi_done(done_SC); - - /* Bus is free, issue any commands in the queue. */ - if (esp->issue_SC && !esp->current_SC) - esp_exec_cmd(esp); - -} - -/* Wheee, ESP interrupt engine. */ - -/* Forward declarations. */ -static int esp_do_phase_determine(struct esp *esp); -static int esp_do_data_finale(struct esp *esp); -static int esp_select_complete(struct esp *esp); -static int esp_do_status(struct esp *esp); -static int esp_do_msgin(struct esp *esp); -static int esp_do_msgindone(struct esp *esp); -static int esp_do_msgout(struct esp *esp); -static int esp_do_cmdbegin(struct esp *esp); - -#define sreg_datainp(__sreg) (((__sreg) & ESP_STAT_PMASK) == ESP_DIP) -#define sreg_dataoutp(__sreg) (((__sreg) & ESP_STAT_PMASK) == ESP_DOP) - -/* Read any bytes found in the FAS366 fifo, storing them into - * the ESP driver software state structure. - */ -static void hme_fifo_read(struct esp *esp) -{ - u8 count = 0; - u8 status = esp->sreg; - - /* Cannot safely frob the fifo for these following cases, but - * we must always read the fifo when the reselect interrupt - * is pending. - */ - if (((esp->ireg & ESP_INTR_RSEL) == 0) && - (sreg_datainp(status) || - sreg_dataoutp(status) || - (esp->current_SC && - esp->current_SC->SCp.phase == in_data_done))) { - ESPHME(("<wkaround_skipped>")); - } else { - unsigned long fcnt = sbus_readb(esp->eregs + ESP_FFLAGS) & ESP_FF_FBYTES; - - /* The HME stores bytes in multiples of 2 in the fifo. */ - ESPHME(("hme_fifo[fcnt=%d", (int)fcnt)); - while (fcnt) { - esp->hme_fifo_workaround_buffer[count++] = - sbus_readb(esp->eregs + ESP_FDATA); - esp->hme_fifo_workaround_buffer[count++] = - sbus_readb(esp->eregs + ESP_FDATA); - ESPHME(("<%02x,%02x>", esp->hme_fifo_workaround_buffer[count-2], esp->hme_fifo_workaround_buffer[count-1])); - fcnt--; - } - if (sbus_readb(esp->eregs + ESP_STATUS2) & ESP_STAT2_F1BYTE) { - ESPHME(("<poke_byte>")); - sbus_writeb(0, esp->eregs + ESP_FDATA); - esp->hme_fifo_workaround_buffer[count++] = - sbus_readb(esp->eregs + ESP_FDATA); - ESPHME(("<%02x,0x00>", esp->hme_fifo_workaround_buffer[count-1])); - ESPHME(("CMD_FLUSH")); - esp_cmd(esp, ESP_CMD_FLUSH); - } else { - ESPHME(("no_xtra_byte")); - } - } - ESPHME(("wkarnd_cnt=%d]", (int)count)); - esp->hme_fifo_workaround_count = count; -} - -static inline void hme_fifo_push(struct esp *esp, u8 *bytes, u8 count) -{ - esp_cmd(esp, ESP_CMD_FLUSH); - while (count) { - u8 tmp = *bytes++; - sbus_writeb(tmp, esp->eregs + ESP_FDATA); - sbus_writeb(0, esp->eregs + ESP_FDATA); - count--; - } -} - -/* We try to avoid some interrupts by jumping ahead and see if the ESP - * has gotten far enough yet. Hence the following. - */ -static inline int skipahead1(struct esp *esp, struct scsi_cmnd *scp, - int prev_phase, int new_phase) -{ - if (scp->SCp.sent_command != prev_phase) - return 0; - if (ESP_IRQ_P(esp->dregs)) { - /* Yes, we are able to save an interrupt. */ - if (esp->erev == fashme) - esp->sreg2 = sbus_readb(esp->eregs + ESP_STATUS2); - esp->sreg = (sbus_readb(esp->eregs + ESP_STATUS) & ~(ESP_STAT_INTR)); - esp->ireg = sbus_readb(esp->eregs + ESP_INTRPT); - if (esp->erev == fashme) { - /* This chip is really losing. */ - ESPHME(("HME[")); - /* Must latch fifo before reading the interrupt - * register else garbage ends up in the FIFO - * which confuses the driver utterly. - * Happy Meal indeed.... - */ - ESPHME(("fifo_workaround]")); - if (!(esp->sreg2 & ESP_STAT2_FEMPTY) || - (esp->sreg2 & ESP_STAT2_F1BYTE)) - hme_fifo_read(esp); - } - if (!(esp->ireg & ESP_INTR_SR)) - return 0; - else - return do_reset_complete; - } - /* Ho hum, target is taking forever... */ - scp->SCp.sent_command = new_phase; /* so we don't recurse... */ - return do_intr_end; -} - -static inline int skipahead2(struct esp *esp, struct scsi_cmnd *scp, - int prev_phase1, int prev_phase2, int new_phase) -{ - if (scp->SCp.sent_command != prev_phase1 && - scp->SCp.sent_command != prev_phase2) - return 0; - if (ESP_IRQ_P(esp->dregs)) { - /* Yes, we are able to save an interrupt. */ - if (esp->erev == fashme) - esp->sreg2 = sbus_readb(esp->eregs + ESP_STATUS2); - esp->sreg = (sbus_readb(esp->eregs + ESP_STATUS) & ~(ESP_STAT_INTR)); - esp->ireg = sbus_readb(esp->eregs + ESP_INTRPT); - if (esp->erev == fashme) { - /* This chip is really losing. */ - ESPHME(("HME[")); - - /* Must latch fifo before reading the interrupt - * register else garbage ends up in the FIFO - * which confuses the driver utterly. - * Happy Meal indeed.... - */ - ESPHME(("fifo_workaround]")); - if (!(esp->sreg2 & ESP_STAT2_FEMPTY) || - (esp->sreg2 & ESP_STAT2_F1BYTE)) - hme_fifo_read(esp); - } - if (!(esp->ireg & ESP_INTR_SR)) - return 0; - else - return do_reset_complete; - } - /* Ho hum, target is taking forever... */ - scp->SCp.sent_command = new_phase; /* so we don't recurse... */ - return do_intr_end; -} - -/* Now some dma helpers. */ -static void dma_setup(struct esp *esp, __u32 addr, int count, int write) -{ - u32 nreg = sbus_readl(esp->dregs + DMA_CSR); - - if (write) - nreg |= DMA_ST_WRITE; - else - nreg &= ~(DMA_ST_WRITE); - nreg |= DMA_ENABLE; - sbus_writel(nreg, esp->dregs + DMA_CSR); - if (esp->dma->revision == dvmaesc1) { - /* This ESC gate array sucks! */ - __u32 src = addr; - __u32 dest = src + count; - - if (dest & (PAGE_SIZE - 1)) - count = PAGE_ALIGN(count); - sbus_writel(count, esp->dregs + DMA_COUNT); - } - sbus_writel(addr, esp->dregs + DMA_ADDR); -} - -static void dma_drain(struct esp *esp) -{ - u32 tmp; - - if (esp->dma->revision == dvmahme) - return; - if ((tmp = sbus_readl(esp->dregs + DMA_CSR)) & DMA_FIFO_ISDRAIN) { - switch (esp->dma->revision) { - default: - tmp |= DMA_FIFO_STDRAIN; - sbus_writel(tmp, esp->dregs + DMA_CSR); - - case dvmarev3: - case dvmaesc1: - while (sbus_readl(esp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN) - udelay(1); - }; - } -} - -static void dma_invalidate(struct esp *esp) -{ - u32 tmp; - - if (esp->dma->revision == dvmahme) { - sbus_writel(DMA_RST_SCSI, esp->dregs + DMA_CSR); - - esp->prev_hme_dmacsr = ((esp->prev_hme_dmacsr | - (DMA_PARITY_OFF | DMA_2CLKS | - DMA_SCSI_DISAB | DMA_INT_ENAB)) & - ~(DMA_ST_WRITE | DMA_ENABLE)); - - sbus_writel(0, esp->dregs + DMA_CSR); - sbus_writel(esp->prev_hme_dmacsr, esp->dregs + DMA_CSR); - - /* This is necessary to avoid having the SCSI channel - * engine lock up on us. - */ - sbus_writel(0, esp->dregs + DMA_ADDR); - } else { - while ((tmp = sbus_readl(esp->dregs + DMA_CSR)) & DMA_PEND_READ) - udelay(1); - - tmp &= ~(DMA_ENABLE | DMA_ST_WRITE | DMA_BCNT_ENAB); - tmp |= DMA_FIFO_INV; - sbus_writel(tmp, esp->dregs + DMA_CSR); - tmp &= ~DMA_FIFO_INV; - sbus_writel(tmp, esp->dregs + DMA_CSR); - } -} - -static inline void dma_flashclear(struct esp *esp) -{ - dma_drain(esp); - dma_invalidate(esp); -} - -static int dma_can_transfer(struct esp *esp, struct scsi_cmnd *sp) -{ - __u32 base, end, sz; - - if (esp->dma->revision == dvmarev3) { - sz = sp->SCp.this_residual; - if (sz > 0x1000000) - sz = 0x1000000; - } else { - base = ((__u32)((unsigned long)sp->SCp.ptr)); - base &= (0x1000000 - 1); - end = (base + sp->SCp.this_residual); - if (end > 0x1000000) - end = 0x1000000; - sz = (end - base); - } - return sz; -} - -/* Misc. esp helper macros. */ -#define esp_setcount(__eregs, __cnt, __hme) \ - sbus_writeb(((__cnt)&0xff), (__eregs) + ESP_TCLOW); \ - sbus_writeb((((__cnt)>>8)&0xff), (__eregs) + ESP_TCMED); \ - if (__hme) { \ - sbus_writeb((((__cnt)>>16)&0xff), (__eregs) + FAS_RLO); \ - sbus_writeb(0, (__eregs) + FAS_RHI); \ - } - -#define esp_getcount(__eregs, __hme) \ - ((sbus_readb((__eregs) + ESP_TCLOW)&0xff) | \ - ((sbus_readb((__eregs) + ESP_TCMED)&0xff) << 8) | \ - ((__hme) ? sbus_readb((__eregs) + FAS_RLO) << 16 : 0)) - -#define fcount(__esp) \ - (((__esp)->erev == fashme) ? \ - (__esp)->hme_fifo_workaround_count : \ - sbus_readb(((__esp)->eregs) + ESP_FFLAGS) & ESP_FF_FBYTES) - -#define fnzero(__esp) \ - (((__esp)->erev == fashme) ? 0 : \ - sbus_readb(((__esp)->eregs) + ESP_FFLAGS) & ESP_FF_ONOTZERO) - -/* XXX speculative nops unnecessary when continuing amidst a data phase - * XXX even on esp100!!! another case of flooding the bus with I/O reg - * XXX writes... - */ -#define esp_maybe_nop(__esp) \ - if ((__esp)->erev == esp100) \ - esp_cmd((__esp), ESP_CMD_NULL) - -#define sreg_to_dataphase(__sreg) \ - ((((__sreg) & ESP_STAT_PMASK) == ESP_DOP) ? in_dataout : in_datain) - -/* The ESP100 when in synchronous data phase, can mistake a long final - * REQ pulse from the target as an extra byte, it places whatever is on - * the data lines into the fifo. For now, we will assume when this - * happens that the target is a bit quirky and we don't want to - * be talking synchronously to it anyways. Regardless, we need to - * tell the ESP to eat the extraneous byte so that we can proceed - * to the next phase. - */ -static int esp100_sync_hwbug(struct esp *esp, struct scsi_cmnd *sp, int fifocnt) -{ - /* Do not touch this piece of code. */ - if ((!(esp->erev == esp100)) || - (!(sreg_datainp((esp->sreg = sbus_readb(esp->eregs + ESP_STATUS))) && - !fifocnt) && - !(sreg_dataoutp(esp->sreg) && !fnzero(esp)))) { - if (sp->SCp.phase == in_dataout) - esp_cmd(esp, ESP_CMD_FLUSH); - return 0; - } else { - /* Async mode for this guy. */ - build_sync_nego_msg(esp, 0, 0); - - /* Ack the bogus byte, but set ATN first. */ - esp_cmd(esp, ESP_CMD_SATN); - esp_cmd(esp, ESP_CMD_MOK); - return 1; - } -} - -/* This closes the window during a selection with a reselect pending, because - * we use DMA for the selection process the FIFO should hold the correct - * contents if we get reselected during this process. So we just need to - * ack the possible illegal cmd interrupt pending on the esp100. - */ -static inline int esp100_reconnect_hwbug(struct esp *esp) -{ - u8 tmp; - - if (esp->erev != esp100) - return 0; - tmp = sbus_readb(esp->eregs + ESP_INTRPT); - if (tmp & ESP_INTR_SR) - return 1; - return 0; -} - -/* This verifies the BUSID bits during a reselection so that we know which - * target is talking to us. - */ -static inline int reconnect_target(struct esp *esp) -{ - int it, me = esp->scsi_id_mask, targ = 0; - - if (2 != fcount(esp)) - return -1; - if (esp->erev == fashme) { - /* HME does not latch it's own BUS ID bits during - * a reselection. Also the target number is given - * as an unsigned char, not as a sole bit number - * like the other ESP's do. - * Happy Meal indeed.... - */ - targ = esp->hme_fifo_workaround_buffer[0]; - } else { - it = sbus_readb(esp->eregs + ESP_FDATA); - if (!(it & me)) - return -1; - it &= ~me; - if (it & (it - 1)) - return -1; - while (!(it & 1)) - targ++, it >>= 1; - } - return targ; -} - -/* This verifies the identify from the target so that we know which lun is - * being reconnected. - */ -static inline int reconnect_lun(struct esp *esp) -{ - int lun; - - if ((esp->sreg & ESP_STAT_PMASK) != ESP_MIP) - return -1; - if (esp->erev == fashme) - lun = esp->hme_fifo_workaround_buffer[1]; - else - lun = sbus_readb(esp->eregs + ESP_FDATA); - - /* Yes, you read this correctly. We report lun of zero - * if we see parity error. ESP reports parity error for - * the lun byte, and this is the only way to hope to recover - * because the target is connected. - */ - if (esp->sreg & ESP_STAT_PERR) - return 0; - - /* Check for illegal bits being set in the lun. */ - if ((lun & 0x40) || !(lun & 0x80)) - return -1; - - return lun & 7; -} - -/* This puts the driver in a state where it can revitalize a command that - * is being continued due to reselection. - */ -static inline void esp_connect(struct esp *esp, struct scsi_cmnd *sp) -{ - struct esp_device *esp_dev = sp->device->hostdata; - - if (esp->prev_soff != esp_dev->sync_max_offset || - esp->prev_stp != esp_dev->sync_min_period || - (esp->erev > esp100a && - esp->prev_cfg3 != esp->config3[sp->device->id])) { - esp->prev_soff = esp_dev->sync_max_offset; - esp->prev_stp = esp_dev->sync_min_period; - sbus_writeb(esp->prev_soff, esp->eregs + ESP_SOFF); - sbus_writeb(esp->prev_stp, esp->eregs + ESP_STP); - if (esp->erev > esp100a) { - esp->prev_cfg3 = esp->config3[sp->device->id]; - sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3); - } - } - esp->current_SC = sp; -} - -/* This will place the current working command back into the issue queue - * if we are to receive a reselection amidst a selection attempt. - */ -static inline void esp_reconnect(struct esp *esp, struct scsi_cmnd *sp) -{ - if (!esp->disconnected_SC) - ESPLOG(("esp%d: Weird, being reselected but disconnected " - "command queue is empty.\n", esp->esp_id)); - esp->snip = 0; - esp->current_SC = NULL; - sp->SCp.phase = not_issued; - append_SC(&esp->issue_SC, sp); -} - -/* Begin message in phase. */ -static int esp_do_msgin(struct esp *esp) -{ - /* Must be very careful with the fifo on the HME */ - if ((esp->erev != fashme) || - !(sbus_readb(esp->eregs + ESP_STATUS2) & ESP_STAT2_FEMPTY)) - esp_cmd(esp, ESP_CMD_FLUSH); - esp_maybe_nop(esp); - esp_cmd(esp, ESP_CMD_TI); - esp->msgin_len = 1; - esp->msgin_ctr = 0; - esp_advance_phase(esp->current_SC, in_msgindone); - return do_work_bus; -} - -/* This uses various DMA csr fields and the fifo flags count value to - * determine how many bytes were successfully sent/received by the ESP. - */ -static inline int esp_bytes_sent(struct esp *esp, int fifo_count) -{ - int rval = sbus_readl(esp->dregs + DMA_ADDR) - esp->esp_command_dvma; - - if (esp->dma->revision == dvmarev1) - rval -= (4 - ((sbus_readl(esp->dregs + DMA_CSR) & DMA_READ_AHEAD)>>11)); - return rval - fifo_count; -} - -static inline void advance_sg(struct scsi_cmnd *sp) -{ - ++sp->SCp.buffer; - --sp->SCp.buffers_residual; - sp->SCp.this_residual = sg_dma_len(sp->SCp.buffer); - sp->SCp.ptr = (char *)((unsigned long)sg_dma_address(sp->SCp.buffer)); -} - -/* Please note that the way I've coded these routines is that I _always_ - * check for a disconnect during any and all information transfer - * phases. The SCSI standard states that the target _can_ cause a BUS - * FREE condition by dropping all MSG/CD/IO/BSY signals. Also note - * that during information transfer phases the target controls every - * change in phase, the only thing the initiator can do is "ask" for - * a message out phase by driving ATN true. The target can, and sometimes - * will, completely ignore this request so we cannot assume anything when - * we try to force a message out phase to abort/reset a target. Most of - * the time the target will eventually be nice and go to message out, so - * we may have to hold on to our state about what we want to tell the target - * for some period of time. - */ - -/* I think I have things working here correctly. Even partial transfers - * within a buffer or sub-buffer should not upset us at all no matter - * how bad the target and/or ESP fucks things up. - */ -static int esp_do_data(struct esp *esp) -{ - struct scsi_cmnd *SCptr = esp->current_SC; - int thisphase, hmuch; - - ESPDATA(("esp_do_data: ")); - esp_maybe_nop(esp); - thisphase = sreg_to_dataphase(esp->sreg); - esp_advance_phase(SCptr, thisphase); - ESPDATA(("newphase<%s> ", (thisphase == in_datain) ? "DATAIN" : "DATAOUT")); - hmuch = dma_can_transfer(esp, SCptr); - if (hmuch > (64 * 1024) && (esp->erev != fashme)) - hmuch = (64 * 1024); - ESPDATA(("hmuch<%d> ", hmuch)); - esp->current_transfer_size = hmuch; - - if (esp->erev == fashme) { - u32 tmp = esp->prev_hme_dmacsr; - - /* Always set the ESP count registers first. */ - esp_setcount(esp->eregs, hmuch, 1); - - /* Get the DMA csr computed. */ - tmp |= (DMA_SCSI_DISAB | DMA_ENABLE); - if (thisphase == in_datain) - tmp |= DMA_ST_WRITE; - else - tmp &= ~(DMA_ST_WRITE); - esp->prev_hme_dmacsr = tmp; - - ESPDATA(("DMA|TI --> do_intr_end\n")); - if (thisphase == in_datain) { - sbus_writel(hmuch, esp->dregs + DMA_COUNT); - esp_cmd(esp, ESP_CMD_DMA | ESP_CMD_TI); - } else { - esp_cmd(esp, ESP_CMD_DMA | ESP_CMD_TI); - sbus_writel(hmuch, esp->dregs + DMA_COUNT); - } - sbus_writel((__u32)((unsigned long)SCptr->SCp.ptr), esp->dregs+DMA_ADDR); - sbus_writel(esp->prev_hme_dmacsr, esp->dregs + DMA_CSR); - } else { - esp_setcount(esp->eregs, hmuch, 0); - dma_setup(esp, ((__u32)((unsigned long)SCptr->SCp.ptr)), - hmuch, (thisphase == in_datain)); - ESPDATA(("DMA|TI --> do_intr_end\n")); - esp_cmd(esp, ESP_CMD_DMA | ESP_CMD_TI); - } - return do_intr_end; -} - -/* See how successful the data transfer was. */ -static int esp_do_data_finale(struct esp *esp) -{ - struct scsi_cmnd *SCptr = esp->current_SC; - struct esp_device *esp_dev = SCptr->device->hostdata; - int bogus_data = 0, bytes_sent = 0, fifocnt, ecount = 0; - - ESPDATA(("esp_do_data_finale: ")); - - if (SCptr->SCp.phase == in_datain) { - if (esp->sreg & ESP_STAT_PERR) { - /* Yuck, parity error. The ESP asserts ATN - * so that we can go to message out phase - * immediately and inform the target that - * something bad happened. - */ - ESPLOG(("esp%d: data bad parity detected.\n", - esp->esp_id)); - esp->cur_msgout[0] = INITIATOR_ERROR; - esp->msgout_len = 1; - } - dma_drain(esp); - } - dma_invalidate(esp); - - /* This could happen for the above parity error case. */ - if (esp->ireg != ESP_INTR_BSERV) { - /* Please go to msgout phase, please please please... */ - ESPLOG(("esp%d: !BSERV after data, probably to msgout\n", - esp->esp_id)); - return esp_do_phase_determine(esp); - } - - /* Check for partial transfers and other horrible events. - * Note, here we read the real fifo flags register even - * on HME broken adapters because we skip the HME fifo - * workaround code in esp_handle() if we are doing data - * phase things. We don't want to fuck directly with - * the fifo like that, especially if doing synchronous - * transfers! Also, will need to double the count on - * HME if we are doing wide transfers, as the HME fifo - * will move and count 16-bit quantities during wide data. - * SMCC _and_ Qlogic can both bite me. - */ - fifocnt = (sbus_readb(esp->eregs + ESP_FFLAGS) & ESP_FF_FBYTES); - if (esp->erev != fashme) - ecount = esp_getcount(esp->eregs, 0); - bytes_sent = esp->current_transfer_size; - - ESPDATA(("trans_sz(%d), ", bytes_sent)); - if (esp->erev == fashme) { - if (!(esp->sreg & ESP_STAT_TCNT)) { - ecount = esp_getcount(esp->eregs, 1); - bytes_sent -= ecount; - } - - /* Always subtract any cruft remaining in the FIFO. */ - if (esp->prev_cfg3 & ESP_CONFIG3_EWIDE) - fifocnt <<= 1; - if (SCptr->SCp.phase == in_dataout) - bytes_sent -= fifocnt; - - /* I have an IBM disk which exhibits the following - * behavior during writes to it. It disconnects in - * the middle of a partial transfer, the current sglist - * buffer is 1024 bytes, the disk stops data transfer - * at 512 bytes. - * - * However the FAS366 reports that 32 more bytes were - * transferred than really were. This is precisely - * the size of a fully loaded FIFO in wide scsi mode. - * The FIFO state recorded indicates that it is empty. - * - * I have no idea if this is a bug in the FAS366 chip - * or a bug in the firmware on this IBM disk. In any - * event the following seems to be a good workaround. -DaveM - */ - if (bytes_sent != esp->current_transfer_size && - SCptr->SCp.phase == in_dataout) { - int mask = (64 - 1); - - if ((esp->prev_cfg3 & ESP_CONFIG3_EWIDE) == 0) - mask >>= 1; - - if (bytes_sent & mask) - bytes_sent -= (bytes_sent & mask); - } - } else { - if (!(esp->sreg & ESP_STAT_TCNT)) - bytes_sent -= ecount; - if (SCptr->SCp.phase == in_dataout) - bytes_sent -= fifocnt; - } - - ESPDATA(("bytes_sent(%d), ", bytes_sent)); - - /* If we were in synchronous mode, check for peculiarities. */ - if (esp->erev == fashme) { - if (esp_dev->sync_max_offset) { - if (SCptr->SCp.phase == in_dataout) - esp_cmd(esp, ESP_CMD_FLUSH); - } else { - esp_cmd(esp, ESP_CMD_FLUSH); - } - } else { - if (esp_dev->sync_max_offset) - bogus_data = esp100_sync_hwbug(esp, SCptr, fifocnt); - else - esp_cmd(esp, ESP_CMD_FLUSH); - } - - /* Until we are sure of what has happened, we are certainly - * in the dark. - */ - esp_advance_phase(SCptr, in_the_dark); - - if (bytes_sent < 0) { - /* I've seen this happen due to lost state in this - * driver. No idea why it happened, but allowing - * this value to be negative caused things to - * lock up. This allows greater chance of recovery. - * In fact every time I've seen this, it has been - * a driver bug without question. - */ - ESPLOG(("esp%d: yieee, bytes_sent < 0!\n", esp->esp_id)); - ESPLOG(("esp%d: csz=%d fifocount=%d ecount=%d\n", - esp->esp_id, - esp->current_transfer_size, fifocnt, ecount)); - ESPLOG(("esp%d: use_sg=%d ptr=%p this_residual=%d\n", - esp->esp_id, - SCptr->use_sg, SCptr->SCp.ptr, SCptr->SCp.this_residual)); - ESPLOG(("esp%d: Forcing async for target %d\n", esp->esp_id, - SCptr->device->id)); - SCptr->device->borken = 1; - esp_dev->sync = 0; - bytes_sent = 0; - } - - /* Update the state of our transfer. */ - SCptr->SCp.ptr += bytes_sent; - SCptr->SCp.this_residual -= bytes_sent; - if (SCptr->SCp.this_residual < 0) { - /* shit */ - ESPLOG(("esp%d: Data transfer overrun.\n", esp->esp_id)); - SCptr->SCp.this_residual = 0; - } - - /* Maybe continue. */ - if (!bogus_data) { - ESPDATA(("!bogus_data, ")); - - /* NO MATTER WHAT, we advance the scatterlist, - * if the target should decide to disconnect - * in between scatter chunks (which is common) - * we could die horribly! I used to have the sg - * advance occur only if we are going back into - * (or are staying in) a data phase, you can - * imagine the hell I went through trying to - * figure this out. - */ - if (SCptr->use_sg && !SCptr->SCp.this_residual) - advance_sg(SCptr); - if (sreg_datainp(esp->sreg) || sreg_dataoutp(esp->sreg)) { - ESPDATA(("to more data\n")); - return esp_do_data(esp); - } - ESPDATA(("to new phase\n")); - return esp_do_phase_determine(esp); - } - /* Bogus data, just wait for next interrupt. */ - ESPLOG(("esp%d: bogus_data during end of data phase\n", - esp->esp_id)); - return do_intr_end; -} - -/* We received a non-good status return at the end of - * running a SCSI command. This is used to decide if - * we should clear our synchronous transfer state for - * such a device when that happens. - * - * The idea is that when spinning up a disk or rewinding - * a tape, we don't want to go into a loop re-negotiating - * synchronous capabilities over and over. - */ -static int esp_should_clear_sync(struct scsi_cmnd *sp) -{ - u8 cmd = sp->cmnd[0]; - - /* These cases are for spinning up a disk and - * waiting for that spinup to complete. - */ - if (cmd == START_STOP) - return 0; - - if (cmd == TEST_UNIT_READY) - return 0; - - /* One more special case for SCSI tape drives, - * this is what is used to probe the device for - * completion of a rewind or tape load operation. - */ - if (sp->device->type == TYPE_TAPE) { - if (cmd == MODE_SENSE) - return 0; - } - - return 1; -} - -/* Either a command is completing or a target is dropping off the bus - * to continue the command in the background so we can do other work. - */ -static int esp_do_freebus(struct esp *esp) -{ - struct scsi_cmnd *SCptr = esp->current_SC; - struct esp_device *esp_dev = SCptr->device->hostdata; - int rval; - - rval = skipahead2(esp, SCptr, in_status, in_msgindone, in_freeing); - if (rval) - return rval; - if (esp->ireg != ESP_INTR_DC) { - ESPLOG(("esp%d: Target will not disconnect\n", esp->esp_id)); - return do_reset_bus; /* target will not drop BSY... */ - } - esp->msgout_len = 0; - esp->prevmsgout = NOP; - if (esp->prevmsgin == COMMAND_COMPLETE) { - /* Normal end of nexus. */ - if (esp->disconnected_SC || (esp->erev == fashme)) - esp_cmd(esp, ESP_CMD_ESEL); - - if (SCptr->SCp.Status != GOOD && - SCptr->SCp.Status != CONDITION_GOOD && - ((1<<SCptr->device->id) & esp->targets_present) && - esp_dev->sync && - esp_dev->sync_max_offset) { - /* SCSI standard says that the synchronous capabilities - * should be renegotiated at this point. Most likely - * we are about to request sense from this target - * in which case we want to avoid using sync - * transfers until we are sure of the current target - * state. - */ - ESPMISC(("esp: Status <%d> for target %d lun %d\n", - SCptr->SCp.Status, SCptr->device->id, SCptr->device->lun)); - - /* But don't do this when spinning up a disk at - * boot time while we poll for completion as it - * fills up the console with messages. Also, tapes - * can report not ready many times right after - * loading up a tape. - */ - if (esp_should_clear_sync(SCptr) != 0) - esp_dev->sync = 0; - } - ESPDISC(("F<%02x,%02x>", SCptr->device->id, SCptr->device->lun)); - esp_done(esp, ((SCptr->SCp.Status & 0xff) | - ((SCptr->SCp.Message & 0xff)<<8) | - (DID_OK << 16))); - } else if (esp->prevmsgin == DISCONNECT) { - /* Normal disconnect. */ - esp_cmd(esp, ESP_CMD_ESEL); - ESPDISC(("D<%02x,%02x>", SCptr->device->id, SCptr->device->lun)); - append_SC(&esp->disconnected_SC, SCptr); - esp->current_SC = NULL; - if (esp->issue_SC) - esp_exec_cmd(esp); - } else { - /* Driver bug, we do not expect a disconnect here - * and should not have advanced the state engine - * to in_freeing. - */ - ESPLOG(("esp%d: last msg not disc and not cmd cmplt.\n", - esp->esp_id)); - return do_reset_bus; - } - return do_intr_end; -} - -/* When a reselect occurs, and we cannot find the command to - * reconnect to in our queues, we do this. - */ -static int esp_bad_reconnect(struct esp *esp) -{ - struct scsi_cmnd *sp; - - ESPLOG(("esp%d: Eieeee, reconnecting unknown command!\n", - esp->esp_id)); - ESPLOG(("QUEUE DUMP\n")); - sp = esp->issue_SC; - ESPLOG(("esp%d: issue_SC[", esp->esp_id)); - while (sp) { - ESPLOG(("<%02x,%02x>", sp->device->id, sp->device->lun)); - sp = (struct scsi_cmnd *) sp->host_scribble; - } - ESPLOG(("]\n")); - sp = esp->current_SC; - ESPLOG(("esp%d: current_SC[", esp->esp_id)); - if (sp) - ESPLOG(("<%02x,%02x>", sp->device->id, sp->device->lun)); - else - ESPLOG(("<NULL>")); - ESPLOG(("]\n")); - sp = esp->disconnected_SC; - ESPLOG(("esp%d: disconnected_SC[", esp->esp_id)); - while (sp) { - ESPLOG(("<%02x,%02x>", sp->device->id, sp->device->lun)); - sp = (struct scsi_cmnd *) sp->host_scribble; - } - ESPLOG(("]\n")); - return do_reset_bus; -} - -/* Do the needy when a target tries to reconnect to us. */ -static int esp_do_reconnect(struct esp *esp) -{ - int lun, target; - struct scsi_cmnd *SCptr; - - /* Check for all bogus conditions first. */ - target = reconnect_target(esp); - if (target < 0) { - ESPDISC(("bad bus bits\n")); - return do_reset_bus; - } - lun = reconnect_lun(esp); - if (lun < 0) { - ESPDISC(("target=%2x, bad identify msg\n", target)); - return do_reset_bus; - } - - /* Things look ok... */ - ESPDISC(("R<%02x,%02x>", target, lun)); - - /* Must not flush FIFO or DVMA on HME. */ - if (esp->erev != fashme) { - esp_cmd(esp, ESP_CMD_FLUSH); - if (esp100_reconnect_hwbug(esp)) - return do_reset_bus; - esp_cmd(esp, ESP_CMD_NULL); - } - - SCptr = remove_SC(&esp->disconnected_SC, (u8) target, (u8) lun); - if (!SCptr) - return esp_bad_reconnect(esp); - - esp_connect(esp, SCptr); - esp_cmd(esp, ESP_CMD_MOK); - - if (esp->erev == fashme) - sbus_writeb(((SCptr->device->id & 0xf) | - (ESP_BUSID_RESELID | ESP_BUSID_CTR32BIT)), - esp->eregs + ESP_BUSID); - - /* Reconnect implies a restore pointers operation. */ - esp_restore_pointers(esp, SCptr); - - esp->snip = 0; - esp_advance_phase(SCptr, in_the_dark); - return do_intr_end; -} - -/* End of NEXUS (hopefully), pick up status + message byte then leave if - * all goes well. - */ -static int esp_do_status(struct esp *esp) -{ - struct scsi_cmnd *SCptr = esp->current_SC; - int intr, rval; - - rval = skipahead1(esp, SCptr, in_the_dark, in_status); - if (rval) - return rval; - intr = esp->ireg; - ESPSTAT(("esp_do_status: ")); - if (intr != ESP_INTR_DC) { - int message_out = 0; /* for parity problems */ - - /* Ack the message. */ - ESPSTAT(("ack msg, ")); - esp_cmd(esp, ESP_CMD_MOK); - - if (esp->erev != fashme) { - dma_flashclear(esp); - - /* Wait till the first bits settle. */ - while (esp->esp_command[0] == 0xff) - udelay(1); - } else { - esp->esp_command[0] = esp->hme_fifo_workaround_buffer[0]; - esp->esp_command[1] = esp->hme_fifo_workaround_buffer[1]; - } - - ESPSTAT(("got something, ")); - /* ESP chimes in with one of - * - * 1) function done interrupt: - * both status and message in bytes - * are available - * - * 2) bus service interrupt: - * only status byte was acquired - * - * 3) Anything else: - * can't happen, but we test for it - * anyways - * - * ALSO: If bad parity was detected on either - * the status _or_ the message byte then - * the ESP has asserted ATN on the bus - * and we must therefore wait for the - * next phase change. - */ - if (intr & ESP_INTR_FDONE) { - /* We got it all, hallejulia. */ - ESPSTAT(("got both, ")); - SCptr->SCp.Status = esp->esp_command[0]; - SCptr->SCp.Message = esp->esp_command[1]; - esp->prevmsgin = SCptr->SCp.Message; - esp->cur_msgin[0] = SCptr->SCp.Message; - if (esp->sreg & ESP_STAT_PERR) { - /* There was bad parity for the - * message byte, the status byte - * was ok. - */ - message_out = MSG_PARITY_ERROR; - } - } else if (intr == ESP_INTR_BSERV) { - /* Only got status byte. */ - ESPLOG(("esp%d: got status only, ", esp->esp_id)); - if (!(esp->sreg & ESP_STAT_PERR)) { - SCptr->SCp.Status = esp->esp_command[0]; - SCptr->SCp.Message = 0xff; - } else { - /* The status byte had bad parity. - * we leave the scsi_pointer Status - * field alone as we set it to a default - * of CHECK_CONDITION in esp_queue. - */ - message_out = INITIATOR_ERROR; - } - } else { - /* This shouldn't happen ever. */ - ESPSTAT(("got bolixed\n")); - esp_advance_phase(SCptr, in_the_dark); - return esp_do_phase_determine(esp); - } - - if (!message_out) { - ESPSTAT(("status=%2x msg=%2x, ", SCptr->SCp.Status, - SCptr->SCp.Message)); - if (SCptr->SCp.Message == COMMAND_COMPLETE) { - ESPSTAT(("and was COMMAND_COMPLETE\n")); - esp_advance_phase(SCptr, in_freeing); - return esp_do_freebus(esp); - } else { - ESPLOG(("esp%d: and _not_ COMMAND_COMPLETE\n", - esp->esp_id)); - esp->msgin_len = esp->msgin_ctr = 1; - esp_advance_phase(SCptr, in_msgindone); - return esp_do_msgindone(esp); - } - } else { - /* With luck we'll be able to let the target - * know that bad parity happened, it will know - * which byte caused the problems and send it - * again. For the case where the status byte - * receives bad parity, I do not believe most - * targets recover very well. We'll see. - */ - ESPLOG(("esp%d: bad parity somewhere mout=%2x\n", - esp->esp_id, message_out)); - esp->cur_msgout[0] = message_out; - esp->msgout_len = esp->msgout_ctr = 1; - esp_advance_phase(SCptr, in_the_dark); - return esp_do_phase_determine(esp); - } - } else { - /* If we disconnect now, all hell breaks loose. */ - ESPLOG(("esp%d: whoops, disconnect\n", esp->esp_id)); - esp_advance_phase(SCptr, in_the_dark); - return esp_do_phase_determine(esp); - } -} - -static int esp_enter_status(struct esp *esp) -{ - u8 thecmd = ESP_CMD_ICCSEQ; - - esp_cmd(esp, ESP_CMD_FLUSH); - if (esp->erev != fashme) { - u32 tmp; - - esp->esp_command[0] = esp->esp_command[1] = 0xff; - sbus_writeb(2, esp->eregs + ESP_TCLOW); - sbus_writeb(0, esp->eregs + ESP_TCMED); - tmp = sbus_readl(esp->dregs + DMA_CSR); - tmp |= (DMA_ST_WRITE | DMA_ENABLE); - sbus_writel(tmp, esp->dregs + DMA_CSR); - if (esp->dma->revision == dvmaesc1) - sbus_writel(0x100, esp->dregs + DMA_COUNT); - sbus_writel(esp->esp_command_dvma, esp->dregs + DMA_ADDR); - thecmd |= ESP_CMD_DMA; - } - esp_cmd(esp, thecmd); - esp_advance_phase(esp->current_SC, in_status); - - return esp_do_status(esp); -} - -static int esp_disconnect_amidst_phases(struct esp *esp) -{ - struct scsi_cmnd *sp = esp->current_SC; - struct esp_device *esp_dev = sp->device->hostdata; - - /* This means real problems if we see this - * here. Unless we were actually trying - * to force the device to abort/reset. - */ - ESPLOG(("esp%d Disconnect amidst phases, ", esp->esp_id)); - ESPLOG(("pphase<%s> cphase<%s>, ", - phase_string(sp->SCp.phase), - phase_string(sp->SCp.sent_command))); - - if (esp->disconnected_SC != NULL || (esp->erev == fashme)) - esp_cmd(esp, ESP_CMD_ESEL); - - switch (esp->cur_msgout[0]) { - default: - /* We didn't expect this to happen at all. */ - ESPLOG(("device is bolixed\n")); - esp_advance_phase(sp, in_tgterror); - esp_done(esp, (DID_ERROR << 16)); - break; - - case BUS_DEVICE_RESET: - ESPLOG(("device reset successful\n")); - esp_dev->sync_max_offset = 0; - esp_dev->sync_min_period = 0; - esp_dev->sync = 0; - esp_advance_phase(sp, in_resetdev); - esp_done(esp, (DID_RESET << 16)); - break; - - case ABORT: - ESPLOG(("device abort successful\n")); - esp_advance_phase(sp, in_abortone); - esp_done(esp, (DID_ABORT << 16)); - break; - - }; - return do_intr_end; -} - -static int esp_enter_msgout(struct esp *esp) -{ - esp_advance_phase(esp->current_SC, in_msgout); - return esp_do_msgout(esp); -} - -static int esp_enter_msgin(struct esp *esp) -{ - esp_advance_phase(esp->current_SC, in_msgin); - return esp_do_msgin(esp); -} - -static int esp_enter_cmd(struct esp *esp) -{ - esp_advance_phase(esp->current_SC, in_cmdbegin); - return esp_do_cmdbegin(esp); -} - -static int esp_enter_badphase(struct esp *esp) -{ - ESPLOG(("esp%d: Bizarre bus phase %2x.\n", esp->esp_id, - esp->sreg & ESP_STAT_PMASK)); - return do_reset_bus; -} - -typedef int (*espfunc_t)(struct esp *); - -static espfunc_t phase_vector[] = { - esp_do_data, /* ESP_DOP */ - esp_do_data, /* ESP_DIP */ - esp_enter_cmd, /* ESP_CMDP */ - esp_enter_status, /* ESP_STATP */ - esp_enter_badphase, /* ESP_STAT_PMSG */ - esp_enter_badphase, /* ESP_STAT_PMSG | ESP_STAT_PIO */ - esp_enter_msgout, /* ESP_MOP */ - esp_enter_msgin, /* ESP_MIP */ -}; - -/* The target has control of the bus and we have to see where it has - * taken us. - */ -static int esp_do_phase_determine(struct esp *esp) -{ - if ((esp->ireg & ESP_INTR_DC) != 0) - return esp_disconnect_amidst_phases(esp); - return phase_vector[esp->sreg & ESP_STAT_PMASK](esp); -} - -/* First interrupt after exec'ing a cmd comes here. */ -static int esp_select_complete(struct esp *esp) -{ - struct scsi_cmnd *SCptr = esp->current_SC; - struct esp_device *esp_dev = SCptr->device->hostdata; - int cmd_bytes_sent, fcnt; - - if (esp->erev != fashme) - esp->seqreg = (sbus_readb(esp->eregs + ESP_SSTEP) & ESP_STEP_VBITS); - - if (esp->erev == fashme) - fcnt = esp->hme_fifo_workaround_count; - else - fcnt = (sbus_readb(esp->eregs + ESP_FFLAGS) & ESP_FF_FBYTES); - - cmd_bytes_sent = esp_bytes_sent(esp, fcnt); - dma_invalidate(esp); - - /* Let's check to see if a reselect happened - * while we we're trying to select. This must - * be checked first. - */ - if (esp->ireg == (ESP_INTR_RSEL | ESP_INTR_FDONE)) { - esp_reconnect(esp, SCptr); - return esp_do_reconnect(esp); - } - - /* Looks like things worked, we should see a bus service & - * a function complete interrupt at this point. Note we - * are doing a direct comparison because we don't want to - * be fooled into thinking selection was successful if - * ESP_INTR_DC is set, see below. - */ - if (esp->ireg == (ESP_INTR_FDONE | ESP_INTR_BSERV)) { - /* target speaks... */ - esp->targets_present |= (1<<SCptr->device->id); - - /* What if the target ignores the sdtr? */ - if (esp->snip) - esp_dev->sync = 1; - - /* See how far, if at all, we got in getting - * the information out to the target. - */ - switch (esp->seqreg) { - default: - - case ESP_STEP_ASEL: - /* Arbitration won, target selected, but - * we are in some phase which is not command - * phase nor is it message out phase. - * - * XXX We've confused the target, obviously. - * XXX So clear it's state, but we also end - * XXX up clearing everyone elses. That isn't - * XXX so nice. I'd like to just reset this - * XXX target, but if I cannot even get it's - * XXX attention and finish selection to talk - * XXX to it, there is not much more I can do. - * XXX If we have a loaded bus we're going to - * XXX spend the next second or so renegotiating - * XXX for synchronous transfers. - */ - ESPLOG(("esp%d: STEP_ASEL for tgt %d\n", - esp->esp_id, SCptr->device->id)); - - case ESP_STEP_SID: - /* Arbitration won, target selected, went - * to message out phase, sent one message - * byte, then we stopped. ATN is asserted - * on the SCSI bus and the target is still - * there hanging on. This is a legal - * sequence step if we gave the ESP a select - * and stop command. - * - * XXX See above, I could set the borken flag - * XXX in the device struct and retry the - * XXX command. But would that help for - * XXX tagged capable targets? - */ - - case ESP_STEP_NCMD: - /* Arbitration won, target selected, maybe - * sent the one message byte in message out - * phase, but we did not go to command phase - * in the end. Actually, we could have sent - * only some of the message bytes if we tried - * to send out the entire identify and tag - * message using ESP_CMD_SA3. - */ - cmd_bytes_sent = 0; - break; - - case ESP_STEP_PPC: - /* No, not the powerPC pinhead. Arbitration - * won, all message bytes sent if we went to - * message out phase, went to command phase - * but only part of the command was sent. - * - * XXX I've seen this, but usually in conjunction - * XXX with a gross error which appears to have - * XXX occurred between the time I told the - * XXX ESP to arbitrate and when I got the - * XXX interrupt. Could I have misloaded the - * XXX command bytes into the fifo? Actually, - * XXX I most likely missed a phase, and therefore - * XXX went into never never land and didn't even - * XXX know it. That was the old driver though. - * XXX What is even more peculiar is that the ESP - * XXX showed the proper function complete and - * XXX bus service bits in the interrupt register. - */ - - case ESP_STEP_FINI4: - case ESP_STEP_FINI5: - case ESP_STEP_FINI6: - case ESP_STEP_FINI7: - /* Account for the identify message */ - if (SCptr->SCp.phase == in_slct_norm) - cmd_bytes_sent -= 1; - }; - - if (esp->erev != fashme) - esp_cmd(esp, ESP_CMD_NULL); - - /* Be careful, we could really get fucked during synchronous - * data transfers if we try to flush the fifo now. - */ - if ((esp->erev != fashme) && /* not a Happy Meal and... */ - !fcnt && /* Fifo is empty and... */ - /* either we are not doing synchronous transfers or... */ - (!esp_dev->sync_max_offset || - /* We are not going into data in phase. */ - ((esp->sreg & ESP_STAT_PMASK) != ESP_DIP))) - esp_cmd(esp, ESP_CMD_FLUSH); /* flush is safe */ - - /* See how far we got if this is not a slow command. */ - if (!esp->esp_slowcmd) { - if (cmd_bytes_sent < 0) - cmd_bytes_sent = 0; - if (cmd_bytes_sent != SCptr->cmd_len) { - /* Crapola, mark it as a slowcmd - * so that we have some chance of - * keeping the command alive with - * good luck. - * - * XXX Actually, if we didn't send it all - * XXX this means either we didn't set things - * XXX up properly (driver bug) or the target - * XXX or the ESP detected parity on one of - * XXX the command bytes. This makes much - * XXX more sense, and therefore this code - * XXX should be changed to send out a - * XXX parity error message or if the status - * XXX register shows no parity error then - * XXX just expect the target to bring the - * XXX bus into message in phase so that it - * XXX can send us the parity error message. - * XXX SCSI sucks... - */ - esp->esp_slowcmd = 1; - esp->esp_scmdp = &(SCptr->cmnd[cmd_bytes_sent]); - esp->esp_scmdleft = (SCptr->cmd_len - cmd_bytes_sent); - } - } - - /* Now figure out where we went. */ - esp_advance_phase(SCptr, in_the_dark); - return esp_do_phase_determine(esp); - } - - /* Did the target even make it? */ - if (esp->ireg == ESP_INTR_DC) { - /* wheee... nobody there or they didn't like - * what we told it to do, clean up. - */ - - /* If anyone is off the bus, but working on - * a command in the background for us, tell - * the ESP to listen for them. - */ - if (esp->disconnected_SC) - esp_cmd(esp, ESP_CMD_ESEL); - - if (((1<<SCptr->device->id) & esp->targets_present) && - esp->seqreg != 0 && - (esp->cur_msgout[0] == EXTENDED_MESSAGE) && - (SCptr->SCp.phase == in_slct_msg || - SCptr->SCp.phase == in_slct_stop)) { - /* shit */ - esp->snip = 0; - ESPLOG(("esp%d: Failed synchronous negotiation for target %d " - "lun %d\n", esp->esp_id, SCptr->device->id, SCptr->device->lun)); - esp_dev->sync_max_offset = 0; - esp_dev->sync_min_period = 0; - esp_dev->sync = 1; /* so we don't negotiate again */ - - /* Run the command again, this time though we - * won't try to negotiate for synchronous transfers. - * - * XXX I'd like to do something like send an - * XXX INITIATOR_ERROR or ABORT message to the - * XXX target to tell it, "Sorry I confused you, - * XXX please come back and I will be nicer next - * XXX time". But that requires having the target - * XXX on the bus, and it has dropped BSY on us. - */ - esp->current_SC = NULL; - esp_advance_phase(SCptr, not_issued); - prepend_SC(&esp->issue_SC, SCptr); - esp_exec_cmd(esp); - return do_intr_end; - } - - /* Ok, this is normal, this is what we see during boot - * or whenever when we are scanning the bus for targets. - * But first make sure that is really what is happening. - */ - if (((1<<SCptr->device->id) & esp->targets_present)) { - ESPLOG(("esp%d: Warning, live target %d not responding to " - "selection.\n", esp->esp_id, SCptr->device->id)); - - /* This _CAN_ happen. The SCSI standard states that - * the target is to _not_ respond to selection if - * _it_ detects bad parity on the bus for any reason. - * Therefore, we assume that if we've talked successfully - * to this target before, bad parity is the problem. - */ - esp_done(esp, (DID_PARITY << 16)); - } else { - /* Else, there really isn't anyone there. */ - ESPMISC(("esp: selection failure, maybe nobody there?\n")); - ESPMISC(("esp: target %d lun %d\n", - SCptr->device->id, SCptr->device->lun)); - esp_done(esp, (DID_BAD_TARGET << 16)); - } - return do_intr_end; - } - - ESPLOG(("esp%d: Selection failure.\n", esp->esp_id)); - printk("esp%d: Currently -- ", esp->esp_id); - esp_print_ireg(esp->ireg); printk(" "); - esp_print_statreg(esp->sreg); printk(" "); - esp_print_seqreg(esp->seqreg); printk("\n"); - printk("esp%d: New -- ", esp->esp_id); - esp->sreg = sbus_readb(esp->eregs + ESP_STATUS); - esp->seqreg = sbus_readb(esp->eregs + ESP_SSTEP); - esp->ireg = sbus_readb(esp->eregs + ESP_INTRPT); - esp_print_ireg(esp->ireg); printk(" "); - esp_print_statreg(esp->sreg); printk(" "); - esp_print_seqreg(esp->seqreg); printk("\n"); - ESPLOG(("esp%d: resetting bus\n", esp->esp_id)); - return do_reset_bus; /* ugh... */ -} - -/* Continue reading bytes for msgin phase. */ -static int esp_do_msgincont(struct esp *esp) -{ - if (esp->ireg & ESP_INTR_BSERV) { - /* in the right phase too? */ - if ((esp->sreg & ESP_STAT_PMASK) == ESP_MIP) { - /* phew... */ - esp_cmd(esp, ESP_CMD_TI); - esp_advance_phase(esp->current_SC, in_msgindone); - return do_intr_end; - } - - /* We changed phase but ESP shows bus service, - * in this case it is most likely that we, the - * hacker who has been up for 20hrs straight - * staring at the screen, drowned in coffee - * smelling like retched cigarette ashes - * have miscoded something..... so, try to - * recover as best we can. - */ - ESPLOG(("esp%d: message in mis-carriage.\n", esp->esp_id)); - } - esp_advance_phase(esp->current_SC, in_the_dark); - return do_phase_determine; -} - -static int check_singlebyte_msg(struct esp *esp) -{ - esp->prevmsgin = esp->cur_msgin[0]; - if (esp->cur_msgin[0] & 0x80) { - /* wheee... */ - ESPLOG(("esp%d: target sends identify amidst phases\n", - esp->esp_id)); - esp_advance_phase(esp->current_SC, in_the_dark); - return 0; - } else if (((esp->cur_msgin[0] & 0xf0) == 0x20) || - (esp->cur_msgin[0] == EXTENDED_MESSAGE)) { - esp->msgin_len = 2; - esp_advance_phase(esp->current_SC, in_msgincont); - return 0; - } - esp_advance_phase(esp->current_SC, in_the_dark); - switch (esp->cur_msgin[0]) { - default: - /* We don't want to hear about it. */ - ESPLOG(("esp%d: msg %02x which we don't know about\n", esp->esp_id, - esp->cur_msgin[0])); - return MESSAGE_REJECT; - - case NOP: - ESPLOG(("esp%d: target %d sends a nop\n", esp->esp_id, - esp->current_SC->device->id)); - return 0; - - case RESTORE_POINTERS: - /* In this case we might also have to backup the - * "slow command" pointer. It is rare to get such - * a save/restore pointer sequence so early in the - * bus transition sequences, but cover it. - */ - if (esp->esp_slowcmd) { - esp->esp_scmdleft = esp->current_SC->cmd_len; - esp->esp_scmdp = &esp->current_SC->cmnd[0]; - } - esp_restore_pointers(esp, esp->current_SC); - return 0; - - case SAVE_POINTERS: - esp_save_pointers(esp, esp->current_SC); - return 0; - - case COMMAND_COMPLETE: - case DISCONNECT: - /* Freeing the bus, let it go. */ - esp->current_SC->SCp.phase = in_freeing; - return 0; - - case MESSAGE_REJECT: - ESPMISC(("msg reject, ")); - if (esp->prevmsgout == EXTENDED_MESSAGE) { - struct esp_device *esp_dev = esp->current_SC->device->hostdata; - - /* Doesn't look like this target can - * do synchronous or WIDE transfers. - */ - ESPSDTR(("got reject, was trying nego, clearing sync/WIDE\n")); - esp_dev->sync = 1; - esp_dev->wide = 1; - esp_dev->sync_min_period = 0; - esp_dev->sync_max_offset = 0; - return 0; - } else { - ESPMISC(("not sync nego, sending ABORT\n")); - return ABORT; - } - }; -} - -/* Target negotiates for synchronous transfers before we do, this - * is legal although very strange. What is even funnier is that - * the SCSI2 standard specifically recommends against targets doing - * this because so many initiators cannot cope with this occurring. - */ -static int target_with_ants_in_pants(struct esp *esp, - struct scsi_cmnd *SCptr, - struct esp_device *esp_dev) -{ - if (esp_dev->sync || SCptr->device->borken) { - /* sorry, no can do */ - ESPSDTR(("forcing to async, ")); - build_sync_nego_msg(esp, 0, 0); - esp_dev->sync = 1; - esp->snip = 1; - ESPLOG(("esp%d: hoping for msgout\n", esp->esp_id)); - esp_advance_phase(SCptr, in_the_dark); - return EXTENDED_MESSAGE; - } - - /* Ok, we'll check them out... */ - return 0; -} - -static void sync_report(struct esp *esp) -{ - int msg3, msg4; - char *type; - - msg3 = esp->cur_msgin[3]; - msg4 = esp->cur_msgin[4]; - if (msg4) { - int hz = 1000000000 / (msg3 * 4); - int integer = hz / 1000000; - int fraction = (hz - (integer * 1000000)) / 10000; - if ((esp->erev == fashme) && - (esp->config3[esp->current_SC->device->id] & ESP_CONFIG3_EWIDE)) { - type = "FAST-WIDE"; - integer <<= 1; - fraction <<= 1; - } else if ((msg3 * 4) < 200) { - type = "FAST"; - } else { - type = "synchronous"; - } - - /* Do not transform this back into one big printk - * again, it triggers a bug in our sparc64-gcc272 - * sibling call optimization. -DaveM - */ - ESPLOG((KERN_INFO "esp%d: target %d ", - esp->esp_id, esp->current_SC->device->id)); - ESPLOG(("[period %dns offset %d %d.%02dMHz ", - (int) msg3 * 4, (int) msg4, - integer, fraction)); - ESPLOG(("%s SCSI%s]\n", type, - (((msg3 * 4) < 200) ? "-II" : ""))); - } else { - ESPLOG((KERN_INFO "esp%d: target %d asynchronous\n", - esp->esp_id, esp->current_SC->device->id)); - } -} - -static int check_multibyte_msg(struct esp *esp) -{ - struct scsi_cmnd *SCptr = esp->current_SC; - struct esp_device *esp_dev = SCptr->device->hostdata; - u8 regval = 0; - int message_out = 0; - - ESPSDTR(("chk multibyte msg: ")); - if (esp->cur_msgin[2] == EXTENDED_SDTR) { - int period = esp->cur_msgin[3]; - int offset = esp->cur_msgin[4]; - - ESPSDTR(("is sync nego response, ")); - if (!esp->snip) { - int rval; - - /* Target negotiates first! */ - ESPSDTR(("target jumps the gun, ")); - message_out = EXTENDED_MESSAGE; /* we must respond */ - rval = target_with_ants_in_pants(esp, SCptr, esp_dev); - if (rval) - return rval; - } - - ESPSDTR(("examining sdtr, ")); - - /* Offset cannot be larger than ESP fifo size. */ - if (offset > 15) { - ESPSDTR(("offset too big %2x, ", offset)); - offset = 15; - ESPSDTR(("sending back new offset\n")); - build_sync_nego_msg(esp, period, offset); - return EXTENDED_MESSAGE; - } - - if (offset && period > esp->max_period) { - /* Yeee, async for this slow device. */ - ESPSDTR(("period too long %2x, ", period)); - build_sync_nego_msg(esp, 0, 0); - ESPSDTR(("hoping for msgout\n")); - esp_advance_phase(esp->current_SC, in_the_dark); - return EXTENDED_MESSAGE; - } else if (offset && period < esp->min_period) { - ESPSDTR(("period too short %2x, ", period)); - period = esp->min_period; - if (esp->erev > esp236) - regval = 4; - else - regval = 5; - } else if (offset) { - int tmp; - - ESPSDTR(("period is ok, ")); - tmp = esp->ccycle / 1000; - regval = (((period << 2) + tmp - 1) / tmp); - if (regval && ((esp->erev == fas100a || - esp->erev == fas236 || - esp->erev == fashme))) { - if (period >= 50) - regval--; - } - } - - if (offset) { - u8 bit; - - esp_dev->sync_min_period = (regval & 0x1f); - esp_dev->sync_max_offset = (offset | esp->radelay); - if (esp->erev == fas100a || esp->erev == fas236 || esp->erev == fashme) { - if ((esp->erev == fas100a) || (esp->erev == fashme)) - bit = ESP_CONFIG3_FAST; - else - bit = ESP_CONFIG3_FSCSI; - if (period < 50) { - /* On FAS366, if using fast-20 synchronous transfers - * we need to make sure the REQ/ACK assert/deassert - * control bits are clear. - */ - if (esp->erev == fashme) - esp_dev->sync_max_offset &= ~esp->radelay; - esp->config3[SCptr->device->id] |= bit; - } else { - esp->config3[SCptr->device->id] &= ~bit; - } - esp->prev_cfg3 = esp->config3[SCptr->device->id]; - sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3); - } - esp->prev_soff = esp_dev->sync_max_offset; - esp->prev_stp = esp_dev->sync_min_period; - sbus_writeb(esp->prev_soff, esp->eregs + ESP_SOFF); - sbus_writeb(esp->prev_stp, esp->eregs + ESP_STP); - ESPSDTR(("soff=%2x stp=%2x cfg3=%2x\n", - esp_dev->sync_max_offset, - esp_dev->sync_min_period, - esp->config3[SCptr->device->id])); - - esp->snip = 0; - } else if (esp_dev->sync_max_offset) { - u8 bit; - - /* back to async mode */ - ESPSDTR(("unaccaptable sync nego, forcing async\n")); - esp_dev->sync_max_offset = 0; - esp_dev->sync_min_period = 0; - esp->prev_soff = 0; - esp->prev_stp = 0; - sbus_writeb(esp->prev_soff, esp->eregs + ESP_SOFF); - sbus_writeb(esp->prev_stp, esp->eregs + ESP_STP); - if (esp->erev == fas100a || esp->erev == fas236 || esp->erev == fashme) { - if ((esp->erev == fas100a) || (esp->erev == fashme)) - bit = ESP_CONFIG3_FAST; - else - bit = ESP_CONFIG3_FSCSI; - esp->config3[SCptr->device->id] &= ~bit; - esp->prev_cfg3 = esp->config3[SCptr->device->id]; - sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3); - } - } - - sync_report(esp); - - ESPSDTR(("chk multibyte msg: sync is known, ")); - esp_dev->sync = 1; - - if (message_out) { - ESPLOG(("esp%d: sending sdtr back, hoping for msgout\n", - esp->esp_id)); - build_sync_nego_msg(esp, period, offset); - esp_advance_phase(SCptr, in_the_dark); - return EXTENDED_MESSAGE; - } - - ESPSDTR(("returning zero\n")); - esp_advance_phase(SCptr, in_the_dark); /* ...or else! */ - return 0; - } else if (esp->cur_msgin[2] == EXTENDED_WDTR) { - int size = 8 << esp->cur_msgin[3]; - - esp->wnip = 0; - if (esp->erev != fashme) { - ESPLOG(("esp%d: AIEEE wide msg received and not HME.\n", - esp->esp_id)); - message_out = MESSAGE_REJECT; - } else if (size > 16) { - ESPLOG(("esp%d: AIEEE wide transfer for %d size " - "not supported.\n", esp->esp_id, size)); - message_out = MESSAGE_REJECT; - } else { - /* Things look good; let's see what we got. */ - if (size == 16) { - /* Set config 3 register for this target. */ - esp->config3[SCptr->device->id] |= ESP_CONFIG3_EWIDE; - } else { - /* Just make sure it was one byte sized. */ - if (size != 8) { - ESPLOG(("esp%d: Aieee, wide nego of %d size.\n", - esp->esp_id, size)); - message_out = MESSAGE_REJECT; - goto finish; - } - /* Pure paranoia. */ - esp->config3[SCptr->device->id] &= ~(ESP_CONFIG3_EWIDE); - } - esp->prev_cfg3 = esp->config3[SCptr->device->id]; - sbus_writeb(esp->prev_cfg3, esp->eregs + ESP_CFG3); - - /* Regardless, next try for sync transfers. */ - build_sync_nego_msg(esp, esp->sync_defp, 15); - esp_dev->sync = 1; - esp->snip = 1; - message_out = EXTENDED_MESSAGE; - } - } else if (esp->cur_msgin[2] == EXTENDED_MODIFY_DATA_POINTER) { - ESPLOG(("esp%d: rejecting modify data ptr msg\n", esp->esp_id)); - message_out = MESSAGE_REJECT; - } -finish: - esp_advance_phase(SCptr, in_the_dark); - return message_out; -} - -static int esp_do_msgindone(struct esp *esp) -{ - struct scsi_cmnd *SCptr = esp->current_SC; - int message_out = 0, it = 0, rval; - - rval = skipahead1(esp, SCptr, in_msgin, in_msgindone); - if (rval) - return rval; - if (SCptr->SCp.sent_command != in_status) { - if (!(esp->ireg & ESP_INTR_DC)) { - if (esp->msgin_len && (esp->sreg & ESP_STAT_PERR)) { - message_out = MSG_PARITY_ERROR; - esp_cmd(esp, ESP_CMD_FLUSH); - } else if (esp->erev != fashme && - (it = (sbus_readb(esp->eregs + ESP_FFLAGS) & ESP_FF_FBYTES)) != 1) { - /* We certainly dropped the ball somewhere. */ - message_out = INITIATOR_ERROR; - esp_cmd(esp, ESP_CMD_FLUSH); - } else if (!esp->msgin_len) { - if (esp->erev == fashme) - it = esp->hme_fifo_workaround_buffer[0]; - else - it = sbus_readb(esp->eregs + ESP_FDATA); - esp_advance_phase(SCptr, in_msgincont); - } else { - /* it is ok and we want it */ - if (esp->erev == fashme) - it = esp->cur_msgin[esp->msgin_ctr] = - esp->hme_fifo_workaround_buffer[0]; - else - it = esp->cur_msgin[esp->msgin_ctr] = - sbus_readb(esp->eregs + ESP_FDATA); - esp->msgin_ctr++; - } - } else { - esp_advance_phase(SCptr, in_the_dark); - return do_work_bus; - } - } else { - it = esp->cur_msgin[0]; - } - if (!message_out && esp->msgin_len) { - if (esp->msgin_ctr < esp->msgin_len) { - esp_advance_phase(SCptr, in_msgincont); - } else if (esp->msgin_len == 1) { - message_out = check_singlebyte_msg(esp); - } else if (esp->msgin_len == 2) { - if (esp->cur_msgin[0] == EXTENDED_MESSAGE) { - if ((it + 2) >= 15) { - message_out = MESSAGE_REJECT; - } else { - esp->msgin_len = (it + 2); - esp_advance_phase(SCptr, in_msgincont); - } - } else { - message_out = MESSAGE_REJECT; /* foo on you */ - } - } else { - message_out = check_multibyte_msg(esp); - } - } - if (message_out < 0) { - return -message_out; - } else if (message_out) { - if (((message_out != 1) && - ((message_out < 0x20) || (message_out & 0x80)))) - esp->msgout_len = 1; - esp->cur_msgout[0] = message_out; - esp_cmd(esp, ESP_CMD_SATN); - esp_advance_phase(SCptr, in_the_dark); - esp->msgin_len = 0; - } - esp->sreg = sbus_readb(esp->eregs + ESP_STATUS); - esp->sreg &= ~(ESP_STAT_INTR); - if ((esp->sreg & (ESP_STAT_PMSG|ESP_STAT_PCD)) == (ESP_STAT_PMSG|ESP_STAT_PCD)) - esp_cmd(esp, ESP_CMD_MOK); - if ((SCptr->SCp.sent_command == in_msgindone) && - (SCptr->SCp.phase == in_freeing)) - return esp_do_freebus(esp); - return do_intr_end; -} - -static int esp_do_cmdbegin(struct esp *esp) -{ - struct scsi_cmnd *SCptr = esp->current_SC; - - esp_advance_phase(SCptr, in_cmdend); - if (esp->erev == fashme) { - u32 tmp = sbus_readl(esp->dregs + DMA_CSR); - int i; - - for (i = 0; i < esp->esp_scmdleft; i++) - esp->esp_command[i] = *esp->esp_scmdp++; - esp->esp_scmdleft = 0; - esp_cmd(esp, ESP_CMD_FLUSH); - esp_setcount(esp->eregs, i, 1); - esp_cmd(esp, (ESP_CMD_DMA | ESP_CMD_TI)); - tmp |= (DMA_SCSI_DISAB | DMA_ENABLE); - tmp &= ~(DMA_ST_WRITE); - sbus_writel(i, esp->dregs + DMA_COUNT); - sbus_writel(esp->esp_command_dvma, esp->dregs + DMA_ADDR); - sbus_writel(tmp, esp->dregs + DMA_CSR); - } else { - u8 tmp; - - esp_cmd(esp, ESP_CMD_FLUSH); - tmp = *esp->esp_scmdp++; - esp->esp_scmdleft--; - sbus_writeb(tmp, esp->eregs + ESP_FDATA); - esp_cmd(esp, ESP_CMD_TI); - } - return do_intr_end; -} - -static int esp_do_cmddone(struct esp *esp) -{ - if (esp->erev == fashme) - dma_invalidate(esp); - else - esp_cmd(esp, ESP_CMD_NULL); - - if (esp->ireg & ESP_INTR_BSERV) { - esp_advance_phase(esp->current_SC, in_the_dark); - return esp_do_phase_determine(esp); - } - - ESPLOG(("esp%d: in do_cmddone() but didn't get BSERV interrupt.\n", - esp->esp_id)); - return do_reset_bus; -} - -static int esp_do_msgout(struct esp *esp) -{ - esp_cmd(esp, ESP_CMD_FLUSH); - switch (esp->msgout_len) { - case 1: - if (esp->erev == fashme) - hme_fifo_push(esp, &esp->cur_msgout[0], 1); - else - sbus_writeb(esp->cur_msgout[0], esp->eregs + ESP_FDATA); - - esp_cmd(esp, ESP_CMD_TI); - break; - - case 2: - esp->esp_command[0] = esp->cur_msgout[0]; - esp->esp_command[1] = esp->cur_msgout[1]; - - if (esp->erev == fashme) { - hme_fifo_push(esp, &esp->cur_msgout[0], 2); - esp_cmd(esp, ESP_CMD_TI); - } else { - dma_setup(esp, esp->esp_command_dvma, 2, 0); - esp_setcount(esp->eregs, 2, 0); - esp_cmd(esp, ESP_CMD_DMA | ESP_CMD_TI); - } - break; - - case 4: - esp->esp_command[0] = esp->cur_msgout[0]; - esp->esp_command[1] = esp->cur_msgout[1]; - esp->esp_command[2] = esp->cur_msgout[2]; - esp->esp_command[3] = esp->cur_msgout[3]; - esp->snip = 1; - - if (esp->erev == fashme) { - hme_fifo_push(esp, &esp->cur_msgout[0], 4); - esp_cmd(esp, ESP_CMD_TI); - } else { - dma_setup(esp, esp->esp_command_dvma, 4, 0); - esp_setcount(esp->eregs, 4, 0); - esp_cmd(esp, ESP_CMD_DMA | ESP_CMD_TI); - } - break; - - case 5: - esp->esp_command[0] = esp->cur_msgout[0]; - esp->esp_command[1] = esp->cur_msgout[1]; - esp->esp_command[2] = esp->cur_msgout[2]; - esp->esp_command[3] = esp->cur_msgout[3]; - esp->esp_command[4] = esp->cur_msgout[4]; - esp->snip = 1; - - if (esp->erev == fashme) { - hme_fifo_push(esp, &esp->cur_msgout[0], 5); - esp_cmd(esp, ESP_CMD_TI); - } else { - dma_setup(esp, esp->esp_command_dvma, 5, 0); - esp_setcount(esp->eregs, 5, 0); - esp_cmd(esp, ESP_CMD_DMA | ESP_CMD_TI); - } - break; - - default: - /* whoops */ - ESPMISC(("bogus msgout sending NOP\n")); - esp->cur_msgout[0] = NOP; - - if (esp->erev == fashme) { - hme_fifo_push(esp, &esp->cur_msgout[0], 1); - } else { - sbus_writeb(esp->cur_msgout[0], esp->eregs + ESP_FDATA); - } - - esp->msgout_len = 1; - esp_cmd(esp, ESP_CMD_TI); - break; - }; - - esp_advance_phase(esp->current_SC, in_msgoutdone); - return do_intr_end; -} - -static int esp_do_msgoutdone(struct esp *esp) -{ - if (esp->msgout_len > 1) { - /* XXX HME/FAS ATN deassert workaround required, - * XXX no DMA flushing, only possible ESP_CMD_FLUSH - * XXX to kill the fifo. - */ - if (esp->erev != fashme) { - u32 tmp; - - while ((tmp = sbus_readl(esp->dregs + DMA_CSR)) & DMA_PEND_READ) - udelay(1); - tmp &= ~DMA_ENABLE; - sbus_writel(tmp, esp->dregs + DMA_CSR); - dma_invalidate(esp); - } else { - esp_cmd(esp, ESP_CMD_FLUSH); - } - } - if (!(esp->ireg & ESP_INTR_DC)) { - if (esp->erev != fashme) - esp_cmd(esp, ESP_CMD_NULL); - switch (esp->sreg & ESP_STAT_PMASK) { - case ESP_MOP: - /* whoops, parity error */ - ESPLOG(("esp%d: still in msgout, parity error assumed\n", - esp->esp_id)); - if (esp->msgout_len > 1) - esp_cmd(esp, ESP_CMD_SATN); - esp_advance_phase(esp->current_SC, in_msgout); - return do_work_bus; - - case ESP_DIP: - break; - - default: - /* Happy Meal fifo is touchy... */ - if ((esp->erev != fashme) && - !fcount(esp) && - !(((struct esp_device *)esp->current_SC->device->hostdata)->sync_max_offset)) - esp_cmd(esp, ESP_CMD_FLUSH); - break; - - }; - } else { - ESPLOG(("esp%d: disconnect, resetting bus\n", esp->esp_id)); - return do_reset_bus; - } - - /* If we sent out a synchronous negotiation message, update - * our state. - */ - if (esp->cur_msgout[2] == EXTENDED_MESSAGE && - esp->cur_msgout[4] == EXTENDED_SDTR) { - esp->snip = 1; /* anal retentiveness... */ - } - - esp->prevmsgout = esp->cur_msgout[0]; - esp->msgout_len = 0; - esp_advance_phase(esp->current_SC, in_the_dark); - return esp_do_phase_determine(esp); -} - -static int esp_bus_unexpected(struct esp *esp) -{ - ESPLOG(("esp%d: command in weird state %2x\n", - esp->esp_id, esp->current_SC->SCp.phase)); - return do_reset_bus; -} - -static espfunc_t bus_vector[] = { - esp_do_data_finale, - esp_do_data_finale, - esp_bus_unexpected, - esp_do_msgin, - esp_do_msgincont, - esp_do_msgindone, - esp_do_msgout, - esp_do_msgoutdone, - esp_do_cmdbegin, - esp_do_cmddone, - esp_do_status, - esp_do_freebus, - esp_do_phase_determine, - esp_bus_unexpected, - esp_bus_unexpected, - esp_bus_unexpected, -}; - -/* This is the second tier in our dual-level SCSI state machine. */ -static int esp_work_bus(struct esp *esp) -{ - struct scsi_cmnd *SCptr = esp->current_SC; - unsigned int phase; - - ESPBUS(("esp_work_bus: ")); - if (!SCptr) { - ESPBUS(("reconnect\n")); - return esp_do_reconnect(esp); - } - phase = SCptr->SCp.phase; - if ((phase & 0xf0) == in_phases_mask) - return bus_vector[(phase & 0x0f)](esp); - else if ((phase & 0xf0) == in_slct_mask) - return esp_select_complete(esp); - else - return esp_bus_unexpected(esp); -} - -static espfunc_t isvc_vector[] = { - NULL, - esp_do_phase_determine, - esp_do_resetbus, - esp_finish_reset, - esp_work_bus -}; - -/* Main interrupt handler for an esp adapter. */ -static void esp_handle(struct esp *esp) -{ - struct scsi_cmnd *SCptr; - int what_next = do_intr_end; - - SCptr = esp->current_SC; - - /* Check for errors. */ - esp->sreg = sbus_readb(esp->eregs + ESP_STATUS); - esp->sreg &= (~ESP_STAT_INTR); - if (esp->erev == fashme) { - esp->sreg2 = sbus_readb(esp->eregs + ESP_STATUS2); - esp->seqreg = (sbus_readb(esp->eregs + ESP_SSTEP) & ESP_STEP_VBITS); - } - - if (esp->sreg & (ESP_STAT_SPAM)) { - /* Gross error, could be due to one of: - * - * - top of fifo overwritten, could be because - * we tried to do a synchronous transfer with - * an offset greater than ESP fifo size - * - * - top of command register overwritten - * - * - DMA setup to go in one direction, SCSI - * bus points in the other, whoops - * - * - weird phase change during asynchronous - * data phase while we are initiator - */ - ESPLOG(("esp%d: Gross error sreg=%2x\n", esp->esp_id, esp->sreg)); - - /* If a command is live on the bus we cannot safely - * reset the bus, so we'll just let the pieces fall - * where they may. Here we are hoping that the - * target will be able to cleanly go away soon - * so we can safely reset things. - */ - if (!SCptr) { - ESPLOG(("esp%d: No current cmd during gross error, " - "resetting bus\n", esp->esp_id)); - what_next = do_reset_bus; - goto state_machine; - } - } - - if (sbus_readl(esp->dregs + DMA_CSR) & DMA_HNDL_ERROR) { - /* A DMA gate array error. Here we must - * be seeing one of two things. Either the - * virtual to physical address translation - * on the SBUS could not occur, else the - * translation it did get pointed to a bogus - * page. Ho hum... - */ - ESPLOG(("esp%d: DMA error %08x\n", esp->esp_id, - sbus_readl(esp->dregs + DMA_CSR))); - - /* DMA gate array itself must be reset to clear the - * error condition. - */ - esp_reset_dma(esp); - - what_next = do_reset_bus; - goto state_machine; - } - - esp->ireg = sbus_readb(esp->eregs + ESP_INTRPT); /* Unlatch intr reg */ - - if (esp->erev == fashme) { - /* This chip is really losing. */ - ESPHME(("HME[")); - - ESPHME(("sreg2=%02x,", esp->sreg2)); - /* Must latch fifo before reading the interrupt - * register else garbage ends up in the FIFO - * which confuses the driver utterly. - */ - if (!(esp->sreg2 & ESP_STAT2_FEMPTY) || - (esp->sreg2 & ESP_STAT2_F1BYTE)) { - ESPHME(("fifo_workaround]")); - hme_fifo_read(esp); - } else { - ESPHME(("no_fifo_workaround]")); - } - } - - /* No current cmd is only valid at this point when there are - * commands off the bus or we are trying a reset. - */ - if (!SCptr && !esp->disconnected_SC && !(esp->ireg & ESP_INTR_SR)) { - /* Panic is safe, since current_SC is null. */ - ESPLOG(("esp%d: no command in esp_handle()\n", esp->esp_id)); - panic("esp_handle: current_SC == penguin within interrupt!"); - } - - if (esp->ireg & (ESP_INTR_IC)) { - /* Illegal command fed to ESP. Outside of obvious - * software bugs that could cause this, there is - * a condition with esp100 where we can confuse the - * ESP into an erroneous illegal command interrupt - * because it does not scrape the FIFO properly - * for reselection. See esp100_reconnect_hwbug() - * to see how we try very hard to avoid this. - */ - ESPLOG(("esp%d: invalid command\n", esp->esp_id)); - - esp_dump_state(esp); - - if (SCptr != NULL) { - /* Devices with very buggy firmware can drop BSY - * during a scatter list interrupt when using sync - * mode transfers. We continue the transfer as - * expected, the target drops the bus, the ESP - * gets confused, and we get a illegal command - * interrupt because the bus is in the disconnected - * state now and ESP_CMD_TI is only allowed when - * a nexus is alive on the bus. - */ - ESPLOG(("esp%d: Forcing async and disabling disconnect for " - "target %d\n", esp->esp_id, SCptr->device->id)); - SCptr->device->borken = 1; /* foo on you */ - } - - what_next = do_reset_bus; - } else if (!(esp->ireg & ~(ESP_INTR_FDONE | ESP_INTR_BSERV | ESP_INTR_DC))) { - if (SCptr) { - unsigned int phase = SCptr->SCp.phase; - - if (phase & in_phases_mask) { - what_next = esp_work_bus(esp); - } else if (phase & in_slct_mask) { - what_next = esp_select_complete(esp); - } else { - ESPLOG(("esp%d: interrupt for no good reason...\n", - esp->esp_id)); - what_next = do_intr_end; - } - } else { - ESPLOG(("esp%d: BSERV or FDONE or DC while SCptr==NULL\n", - esp->esp_id)); - what_next = do_reset_bus; - } - } else if (esp->ireg & ESP_INTR_SR) { - ESPLOG(("esp%d: SCSI bus reset interrupt\n", esp->esp_id)); - what_next = do_reset_complete; - } else if (esp->ireg & (ESP_INTR_S | ESP_INTR_SATN)) { - ESPLOG(("esp%d: AIEEE we have been selected by another initiator!\n", - esp->esp_id)); - what_next = do_reset_bus; - } else if (esp->ireg & ESP_INTR_RSEL) { - if (SCptr == NULL) { - /* This is ok. */ - what_next = esp_do_reconnect(esp); - } else if (SCptr->SCp.phase & in_slct_mask) { - /* Only selection code knows how to clean - * up properly. - */ - ESPDISC(("Reselected during selection attempt\n")); - what_next = esp_select_complete(esp); - } else { - ESPLOG(("esp%d: Reselected while bus is busy\n", - esp->esp_id)); - what_next = do_reset_bus; - } - } - - /* This is tier-one in our dual level SCSI state machine. */ -state_machine: - while (what_next != do_intr_end) { - if (what_next >= do_phase_determine && - what_next < do_intr_end) { - what_next = isvc_vector[what_next](esp); - } else { - /* state is completely lost ;-( */ - ESPLOG(("esp%d: interrupt engine loses state, resetting bus\n", - esp->esp_id)); - what_next = do_reset_bus; - } - } -} - -/* Service only the ESP described by dev_id. */ -static irqreturn_t esp_intr(int irq, void *dev_id) -{ - struct esp *esp = dev_id; - unsigned long flags; - - spin_lock_irqsave(esp->ehost->host_lock, flags); - if (ESP_IRQ_P(esp->dregs)) { - ESP_INTSOFF(esp->dregs); - - ESPIRQ(("I[%d:%d](", smp_processor_id(), esp->esp_id)); - esp_handle(esp); - ESPIRQ((")")); - - ESP_INTSON(esp->dregs); - } - spin_unlock_irqrestore(esp->ehost->host_lock, flags); - - return IRQ_HANDLED; -} - -static int esp_slave_alloc(struct scsi_device *SDptr) -{ - struct esp_device *esp_dev = - kmalloc(sizeof(struct esp_device), GFP_ATOMIC); - - if (!esp_dev) - return -ENOMEM; - memset(esp_dev, 0, sizeof(struct esp_device)); - SDptr->hostdata = esp_dev; - return 0; -} - -static void esp_slave_destroy(struct scsi_device *SDptr) -{ - struct esp *esp = (struct esp *) SDptr->host->hostdata; - - esp->targets_present &= ~(1 << SDptr->id); - kfree(SDptr->hostdata); - SDptr->hostdata = NULL; -} - -static struct scsi_host_template esp_template = { - .module = THIS_MODULE, - .name = "esp", - .info = esp_info, - .slave_alloc = esp_slave_alloc, - .slave_destroy = esp_slave_destroy, - .queuecommand = esp_queue, - .eh_abort_handler = esp_abort, - .eh_bus_reset_handler = esp_reset, - .can_queue = 7, - .this_id = 7, - .sg_tablesize = SG_ALL, - .cmd_per_lun = 1, - .use_clustering = ENABLE_CLUSTERING, - .proc_name = "esp", - .proc_info = esp_proc_info, -}; - -#ifndef CONFIG_SUN4 -static struct of_device_id esp_match[] = { - { - .name = "SUNW,esp", - .data = &esp_template, - }, - { - .name = "SUNW,fas", - .data = &esp_template, - }, - { - .name = "esp", - .data = &esp_template, - }, - {}, -}; -MODULE_DEVICE_TABLE(of, esp_match); - -static struct of_platform_driver esp_sbus_driver = { - .name = "esp", - .match_table = esp_match, - .probe = esp_sbus_probe, - .remove = __devexit_p(esp_sbus_remove), -}; -#endif - -static int __init esp_init(void) -{ -#ifdef CONFIG_SUN4 - return esp_sun4_probe(&esp_template); -#else - return of_register_driver(&esp_sbus_driver, &sbus_bus_type); -#endif -} - -static void __exit esp_exit(void) -{ -#ifdef CONFIG_SUN4 - esp_sun4_remove(); -#else - of_unregister_driver(&esp_sbus_driver); -#endif -} - -MODULE_DESCRIPTION("ESP Sun SCSI driver"); -MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(DRV_VERSION); - -module_init(esp_init); -module_exit(esp_exit); diff --git a/drivers/scsi/esp.h b/drivers/scsi/esp.h deleted file mode 100644 index a98cda9121f..00000000000 --- a/drivers/scsi/esp.h +++ /dev/null @@ -1,406 +0,0 @@ -/* $Id: esp.h,v 1.29 2001/12/11 04:55:47 davem Exp $ - * esp.h: Defines and structures for the Sparc ESP (Enhanced SCSI - * Processor) driver under Linux. - * - * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) - */ - -#ifndef _SPARC_ESP_H -#define _SPARC_ESP_H - -/* For dvma controller register definitions. */ -#include <asm/dma.h> - -/* The ESP SCSI controllers have their register sets in three - * "classes": - * - * 1) Registers which are both read and write. - * 2) Registers which are read only. - * 3) Registers which are write only. - * - * Yet, they all live within the same IO space. - */ - -/* All the ESP registers are one byte each and are accessed longwords - * apart with a big-endian ordering to the bytes. - */ - /* Access Description Offset */ -#define ESP_TCLOW 0x00UL /* rw Low bits of the transfer count 0x00 */ -#define ESP_TCMED 0x04UL /* rw Mid bits of the transfer count 0x04 */ -#define ESP_FDATA 0x08UL /* rw FIFO data bits 0x08 */ -#define ESP_CMD 0x0cUL /* rw SCSI command bits 0x0c */ -#define ESP_STATUS 0x10UL /* ro ESP status register 0x10 */ -#define ESP_BUSID ESP_STATUS /* wo Bus ID for select/reselect 0x10 */ -#define ESP_INTRPT 0x14UL /* ro Kind of interrupt 0x14 */ -#define ESP_TIMEO ESP_INTRPT /* wo Timeout value for select/resel 0x14 */ -#define ESP_SSTEP 0x18UL /* ro Sequence step register 0x18 */ -#define ESP_STP ESP_SSTEP /* wo Transfer period per sync 0x18 */ -#define ESP_FFLAGS 0x1cUL /* ro Bits of current FIFO info 0x1c */ -#define ESP_SOFF ESP_FFLAGS /* wo Sync offset 0x1c */ -#define ESP_CFG1 0x20UL /* rw First configuration register 0x20 */ -#define ESP_CFACT 0x24UL /* wo Clock conversion factor 0x24 */ -#define ESP_STATUS2 ESP_CFACT /* ro HME status2 register 0x24 */ -#define ESP_CTEST 0x28UL /* wo Chip test register 0x28 */ -#define ESP_CFG2 0x2cUL /* rw Second configuration register 0x2c */ -#define ESP_CFG3 0x30UL /* rw Third configuration register 0x30 */ -#define ESP_TCHI 0x38UL /* rw High bits of transfer count 0x38 */ -#define ESP_UID ESP_TCHI /* ro Unique ID code 0x38 */ -#define FAS_RLO ESP_TCHI /* rw HME extended counter 0x38 */ -#define ESP_FGRND 0x3cUL /* rw Data base for fifo 0x3c */ -#define FAS_RHI ESP_FGRND /* rw HME extended counter 0x3c */ -#define ESP_REG_SIZE 0x40UL - -/* Various revisions of the ESP board. */ -enum esp_rev { - esp100 = 0x00, /* NCR53C90 - very broken */ - esp100a = 0x01, /* NCR53C90A */ - esp236 = 0x02, - fas236 = 0x03, - fas100a = 0x04, - fast = 0x05, - fashme = 0x06, - espunknown = 0x07 -}; - -/* We allocate one of these for each scsi device and attach it to - * SDptr->hostdata for use in the driver - */ -struct esp_device { - unsigned char sync_min_period; - unsigned char sync_max_offset; - unsigned sync:1; - unsigned wide:1; - unsigned disconnect:1; -}; - -struct scsi_cmnd; - -/* We get one of these for each ESP probed. */ -struct esp { - void __iomem *eregs; /* ESP controller registers */ - void __iomem *dregs; /* DMA controller registers */ - struct sbus_dma *dma; /* DMA controller sw state */ - struct Scsi_Host *ehost; /* Backpointer to SCSI Host */ - struct sbus_dev *sdev; /* Pointer to SBus entry */ - - /* ESP Configuration Registers */ - u8 config1; /* Copy of the 1st config register */ - u8 config2; /* Copy of the 2nd config register */ - u8 config3[16]; /* Copy of the 3rd config register */ - - /* The current command we are sending to the ESP chip. This esp_command - * ptr needs to be mapped in DVMA area so we can send commands and read - * from the ESP fifo without burning precious CPU cycles. Programmed I/O - * sucks when we have the DVMA to do it for us. The ESP is stupid and will - * only send out 6, 10, and 12 byte SCSI commands, others we need to send - * one byte at a time. esp_slowcmd being set says that we are doing one - * of the command types ESP doesn't understand, esp_scmdp keeps track of - * which byte we are sending, esp_scmdleft says how many bytes to go. - */ - volatile u8 *esp_command; /* Location of command (CPU view) */ - __u32 esp_command_dvma;/* Location of command (DVMA view) */ - unsigned char esp_clen; /* Length of this command */ - unsigned char esp_slowcmd; - unsigned char *esp_scmdp; - unsigned char esp_scmdleft; - - /* The following are used to determine the cause of an IRQ. Upon every - * IRQ entry we synchronize these with the hardware registers. - */ - u8 ireg; /* Copy of ESP interrupt register */ - u8 sreg; /* Copy of ESP status register */ - u8 seqreg; /* Copy of ESP sequence step register */ - u8 sreg2; /* Copy of HME status2 register */ - - /* To save register writes to the ESP, which can be expensive, we - * keep track of the previous value that various registers had for - * the last target we connected to. If they are the same for the - * current target, we skip the register writes as they are not needed. - */ - u8 prev_soff, prev_stp; - u8 prev_cfg3, __cache_pad; - - /* We also keep a cache of the previous FAS/HME DMA CSR register value. */ - u32 prev_hme_dmacsr; - - /* The HME is the biggest piece of shit I have ever seen. */ - u8 hme_fifo_workaround_buffer[16 * 2]; - u8 hme_fifo_workaround_count; - - /* For each target we keep track of save/restore data - * pointer information. This needs to be updated majorly - * when we add support for tagged queueing. -DaveM - */ - struct esp_pointers { - char *saved_ptr; - struct scatterlist *saved_buffer; - int saved_this_residual; - int saved_buffers_residual; - } data_pointers[16] /*XXX [MAX_TAGS_PER_TARGET]*/; - - /* Clock periods, frequencies, synchronization, etc. */ - unsigned int cfreq; /* Clock frequency in HZ */ - unsigned int cfact; /* Clock conversion factor */ - unsigned int raw_cfact; /* Raw copy from probing */ - unsigned int ccycle; /* One ESP clock cycle */ - unsigned int ctick; /* One ESP clock time */ - unsigned int radelay; /* FAST chip req/ack delay */ - unsigned int neg_defp; /* Default negotiation period */ - unsigned int sync_defp; /* Default sync transfer period */ - unsigned int max_period; /* longest our period can be */ - unsigned int min_period; /* shortest period we can withstand */ - - struct esp *next; /* Next ESP we probed or NULL */ - char prom_name[64]; /* Name of ESP device from prom */ - int prom_node; /* Prom node where ESP found */ - int esp_id; /* Unique per-ESP ID number */ - - /* For slow to medium speed input clock rates we shoot for 5mb/s, - * but for high input clock rates we try to do 10mb/s although I - * don't think a transfer can even run that fast with an ESP even - * with DMA2 scatter gather pipelining. - */ -#define SYNC_DEFP_SLOW 0x32 /* 5mb/s */ -#define SYNC_DEFP_FAST 0x19 /* 10mb/s */ - - unsigned int snip; /* Sync. negotiation in progress */ - unsigned int wnip; /* WIDE negotiation in progress */ - unsigned int targets_present;/* targets spoken to before */ - - int current_transfer_size; /* Set at beginning of data dma */ - - u8 espcmdlog[32]; /* Log of current esp cmds sent. */ - u8 espcmdent; /* Current entry in esp cmd log. */ - - /* Misc. info about this ESP */ - enum esp_rev erev; /* ESP revision */ - int irq; /* SBus IRQ for this ESP */ - int scsi_id; /* Who am I as initiator? */ - int scsi_id_mask; /* Bitmask of 'me'. */ - int diff; /* Differential SCSI bus? */ - int bursts; /* Burst sizes our DVMA supports */ - - /* Our command queues, only one cmd lives in the current_SC queue. */ - struct scsi_cmnd *issue_SC; /* Commands to be issued */ - struct scsi_cmnd *current_SC; /* Who is currently working the bus */ - struct scsi_cmnd *disconnected_SC;/* Commands disconnected from the bus */ - - /* Message goo */ - u8 cur_msgout[16]; - u8 cur_msgin[16]; - u8 prevmsgout, prevmsgin; - u8 msgout_len, msgin_len; - u8 msgout_ctr, msgin_ctr; - - /* States that we cannot keep in the per cmd structure because they - * cannot be assosciated with any specific command. - */ - u8 resetting_bus; - wait_queue_head_t reset_queue; -}; - -/* Bitfield meanings for the above registers. */ - -/* ESP config reg 1, read-write, found on all ESP chips */ -#define ESP_CONFIG1_ID 0x07 /* My BUS ID bits */ -#define ESP_CONFIG1_CHTEST 0x08 /* Enable ESP chip tests */ -#define ESP_CONFIG1_PENABLE 0x10 /* Enable parity checks */ -#define ESP_CONFIG1_PARTEST 0x20 /* Parity test mode enabled? */ -#define ESP_CONFIG1_SRRDISAB 0x40 /* Disable SCSI reset reports */ -#define ESP_CONFIG1_SLCABLE 0x80 /* Enable slow cable mode */ - -/* ESP config reg 2, read-write, found only on esp100a+esp200+esp236 chips */ -#define ESP_CONFIG2_DMAPARITY 0x01 /* enable DMA Parity (200,236) */ -#define ESP_CONFIG2_REGPARITY 0x02 /* enable reg Parity (200,236) */ -#define ESP_CONFIG2_BADPARITY 0x04 /* Bad parity target abort */ -#define ESP_CONFIG2_SCSI2ENAB 0x08 /* Enable SCSI-2 features (tmode only) */ -#define ESP_CONFIG2_HI 0x10 /* High Impedance DREQ ??? */ -#define ESP_CONFIG2_HMEFENAB 0x10 /* HME features enable */ -#define ESP_CONFIG2_BCM 0x20 /* Enable byte-ctrl (236) */ -#define ESP_CONFIG2_DISPINT 0x20 /* Disable pause irq (hme) */ -#define ESP_CONFIG2_FENAB 0x40 /* Enable features (fas100,esp216) */ -#define ESP_CONFIG2_SPL 0x40 /* Enable status-phase latch (esp236) */ -#define ESP_CONFIG2_MKDONE 0x40 /* HME magic feature */ -#define ESP_CONFIG2_HME32 0x80 /* HME 32 extended */ -#define ESP_CONFIG2_MAGIC 0xe0 /* Invalid bits... */ - -/* ESP config register 3 read-write, found only esp236+fas236+fas100a+hme chips */ -#define ESP_CONFIG3_FCLOCK 0x01 /* FAST SCSI clock rate (esp100a/hme) */ -#define ESP_CONFIG3_TEM 0x01 /* Enable thresh-8 mode (esp/fas236) */ -#define ESP_CONFIG3_FAST 0x02 /* Enable FAST SCSI (esp100a/hme) */ -#define ESP_CONFIG3_ADMA 0x02 /* Enable alternate-dma (esp/fas236) */ -#define ESP_CONFIG3_TENB 0x04 /* group2 SCSI2 support (esp100a/hme) */ -#define ESP_CONFIG3_SRB 0x04 /* Save residual byte (esp/fas236) */ -#define ESP_CONFIG3_TMS 0x08 /* Three-byte msg's ok (esp100a/hme) */ -#define ESP_CONFIG3_FCLK 0x08 /* Fast SCSI clock rate (esp/fas236) */ -#define ESP_CONFIG3_IDMSG 0x10 /* ID message checking (esp100a/hme) */ -#define ESP_CONFIG3_FSCSI 0x10 /* Enable FAST SCSI (esp/fas236) */ -#define ESP_CONFIG3_GTM 0x20 /* group2 SCSI2 support (esp/fas236) */ -#define ESP_CONFIG3_IDBIT3 0x20 /* Bit 3 of HME SCSI-ID (hme) */ -#define ESP_CONFIG3_TBMS 0x40 /* Three-byte msg's ok (esp/fas236) */ -#define ESP_CONFIG3_EWIDE 0x40 /* Enable Wide-SCSI (hme) */ -#define ESP_CONFIG3_IMS 0x80 /* ID msg chk'ng (esp/fas236) */ -#define ESP_CONFIG3_OBPUSH 0x80 /* Push odd-byte to dma (hme) */ - -/* ESP command register read-write */ -/* Group 1 commands: These may be sent at any point in time to the ESP - * chip. None of them can generate interrupts 'cept - * the "SCSI bus reset" command if you have not disabled - * SCSI reset interrupts in the config1 ESP register. - */ -#define ESP_CMD_NULL 0x00 /* Null command, ie. a nop */ -#define ESP_CMD_FLUSH 0x01 /* FIFO Flush */ -#define ESP_CMD_RC 0x02 /* Chip reset */ -#define ESP_CMD_RS 0x03 /* SCSI bus reset */ - -/* Group 2 commands: ESP must be an initiator and connected to a target - * for these commands to work. - */ -#define ESP_CMD_TI 0x10 /* Transfer Information */ -#define ESP_CMD_ICCSEQ 0x11 /* Initiator cmd complete sequence */ -#define ESP_CMD_MOK 0x12 /* Message okie-dokie */ -#define ESP_CMD_TPAD 0x18 /* Transfer Pad */ -#define ESP_CMD_SATN 0x1a /* Set ATN */ -#define ESP_CMD_RATN 0x1b /* De-assert ATN */ - -/* Group 3 commands: ESP must be in the MSGOUT or MSGIN state and be connected - * to a target as the initiator for these commands to work. - */ -#define ESP_CMD_SMSG 0x20 /* Send message */ -#define ESP_CMD_SSTAT 0x21 /* Send status */ -#define ESP_CMD_SDATA 0x22 /* Send data */ -#define ESP_CMD_DSEQ 0x23 /* Discontinue Sequence */ -#define ESP_CMD_TSEQ 0x24 /* Terminate Sequence */ -#define ESP_CMD_TCCSEQ 0x25 /* Target cmd cmplt sequence */ -#define ESP_CMD_DCNCT 0x27 /* Disconnect */ -#define ESP_CMD_RMSG 0x28 /* Receive Message */ -#define ESP_CMD_RCMD 0x29 /* Receive Command */ -#define ESP_CMD_RDATA 0x2a /* Receive Data */ -#define ESP_CMD_RCSEQ 0x2b /* Receive cmd sequence */ - -/* Group 4 commands: The ESP must be in the disconnected state and must - * not be connected to any targets as initiator for - * these commands to work. - */ -#define ESP_CMD_RSEL 0x40 /* Reselect */ -#define ESP_CMD_SEL 0x41 /* Select w/o ATN */ -#define ESP_CMD_SELA 0x42 /* Select w/ATN */ -#define ESP_CMD_SELAS 0x43 /* Select w/ATN & STOP */ -#define ESP_CMD_ESEL 0x44 /* Enable selection */ -#define ESP_CMD_DSEL 0x45 /* Disable selections */ -#define ESP_CMD_SA3 0x46 /* Select w/ATN3 */ -#define ESP_CMD_RSEL3 0x47 /* Reselect3 */ - -/* This bit enables the ESP's DMA on the SBus */ -#define ESP_CMD_DMA 0x80 /* Do DMA? */ - - -/* ESP status register read-only */ -#define ESP_STAT_PIO 0x01 /* IO phase bit */ -#define ESP_STAT_PCD 0x02 /* CD phase bit */ -#define ESP_STAT_PMSG 0x04 /* MSG phase bit */ -#define ESP_STAT_PMASK 0x07 /* Mask of phase bits */ -#define ESP_STAT_TDONE 0x08 /* Transfer Completed */ -#define ESP_STAT_TCNT 0x10 /* Transfer Counter Is Zero */ -#define ESP_STAT_PERR 0x20 /* Parity error */ -#define ESP_STAT_SPAM 0x40 /* Real bad error */ -/* This indicates the 'interrupt pending' condition on esp236, it is a reserved - * bit on other revs of the ESP. - */ -#define ESP_STAT_INTR 0x80 /* Interrupt */ - -/* HME only: status 2 register */ -#define ESP_STAT2_SCHBIT 0x01 /* Upper bits 3-7 of sstep enabled */ -#define ESP_STAT2_FFLAGS 0x02 /* The fifo flags are now latched */ -#define ESP_STAT2_XCNT 0x04 /* The transfer counter is latched */ -#define ESP_STAT2_CREGA 0x08 /* The command reg is active now */ -#define ESP_STAT2_WIDE 0x10 /* Interface on this adapter is wide */ -#define ESP_STAT2_F1BYTE 0x20 /* There is one byte at top of fifo */ -#define ESP_STAT2_FMSB 0x40 /* Next byte in fifo is most significant */ -#define ESP_STAT2_FEMPTY 0x80 /* FIFO is empty */ - -/* The status register can be masked with ESP_STAT_PMASK and compared - * with the following values to determine the current phase the ESP - * (at least thinks it) is in. For our purposes we also add our own - * software 'done' bit for our phase management engine. - */ -#define ESP_DOP (0) /* Data Out */ -#define ESP_DIP (ESP_STAT_PIO) /* Data In */ -#define ESP_CMDP (ESP_STAT_PCD) /* Command */ -#define ESP_STATP (ESP_STAT_PCD|ESP_STAT_PIO) /* Status */ -#define ESP_MOP (ESP_STAT_PMSG|ESP_STAT_PCD) /* Message Out */ -#define ESP_MIP (ESP_STAT_PMSG|ESP_STAT_PCD|ESP_STAT_PIO) /* Message In */ - -/* ESP interrupt register read-only */ -#define ESP_INTR_S 0x01 /* Select w/o ATN */ -#define ESP_INTR_SATN 0x02 /* Select w/ATN */ -#define ESP_INTR_RSEL 0x04 /* Reselected */ -#define ESP_INTR_FDONE 0x08 /* Function done */ -#define ESP_INTR_BSERV 0x10 /* Bus service */ -#define ESP_INTR_DC 0x20 /* Disconnect */ -#define ESP_INTR_IC 0x40 /* Illegal command given */ -#define ESP_INTR_SR 0x80 /* SCSI bus reset detected */ - -/* Interrupt status macros */ -#define ESP_SRESET_IRQ(esp) ((esp)->intreg & (ESP_INTR_SR)) -#define ESP_ILLCMD_IRQ(esp) ((esp)->intreg & (ESP_INTR_IC)) -#define ESP_SELECT_WITH_ATN_IRQ(esp) ((esp)->intreg & (ESP_INTR_SATN)) -#define ESP_SELECT_WITHOUT_ATN_IRQ(esp) ((esp)->intreg & (ESP_INTR_S)) -#define ESP_SELECTION_IRQ(esp) ((ESP_SELECT_WITH_ATN_IRQ(esp)) || \ - (ESP_SELECT_WITHOUT_ATN_IRQ(esp))) -#define ESP_RESELECTION_IRQ(esp) ((esp)->intreg & (ESP_INTR_RSEL)) - -/* ESP sequence step register read-only */ -#define ESP_STEP_VBITS 0x07 /* Valid bits */ -#define ESP_STEP_ASEL 0x00 /* Selection&Arbitrate cmplt */ -#define ESP_STEP_SID 0x01 /* One msg byte sent */ -#define ESP_STEP_NCMD 0x02 /* Was not in command phase */ -#define ESP_STEP_PPC 0x03 /* Early phase chg caused cmnd - * bytes to be lost - */ -#define ESP_STEP_FINI4 0x04 /* Command was sent ok */ - -/* Ho hum, some ESP's set the step register to this as well... */ -#define ESP_STEP_FINI5 0x05 -#define ESP_STEP_FINI6 0x06 -#define ESP_STEP_FINI7 0x07 - -/* ESP chip-test register read-write */ -#define ESP_TEST_TARG 0x01 /* Target test mode */ -#define ESP_TEST_INI 0x02 /* Initiator test mode */ -#define ESP_TEST_TS 0x04 /* Tristate test mode */ - -/* ESP unique ID register read-only, found on fas236+fas100a only */ -#define ESP_UID_F100A 0x00 /* ESP FAS100A */ -#define ESP_UID_F236 0x02 /* ESP FAS236 */ -#define ESP_UID_REV 0x07 /* ESP revision */ -#define ESP_UID_FAM 0xf8 /* ESP family */ - -/* ESP fifo flags register read-only */ -/* Note that the following implies a 16 byte FIFO on the ESP. */ -#define ESP_FF_FBYTES 0x1f /* Num bytes in FIFO */ -#define ESP_FF_ONOTZERO 0x20 /* offset ctr not zero (esp100) */ -#define ESP_FF_SSTEP 0xe0 /* Sequence step */ - -/* ESP clock conversion factor register write-only */ -#define ESP_CCF_F0 0x00 /* 35.01MHz - 40MHz */ -#define ESP_CCF_NEVER 0x01 /* Set it to this and die */ -#define ESP_CCF_F2 0x02 /* 10MHz */ -#define ESP_CCF_F3 0x03 /* 10.01MHz - 15MHz */ -#define ESP_CCF_F4 0x04 /* 15.01MHz - 20MHz */ -#define ESP_CCF_F5 0x05 /* 20.01MHz - 25MHz */ -#define ESP_CCF_F6 0x06 /* 25.01MHz - 30MHz */ -#define ESP_CCF_F7 0x07 /* 30.01MHz - 35MHz */ - -/* HME only... */ -#define ESP_BUSID_RESELID 0x10 -#define ESP_BUSID_CTR32BIT 0x40 - -#define ESP_BUS_TIMEOUT 275 /* In milli-seconds */ -#define ESP_TIMEO_CONST 8192 -#define ESP_NEG_DEFP(mhz, cfact) \ - ((ESP_BUS_TIMEOUT * ((mhz) / 1000)) / (8192 * (cfact))) -#define ESP_MHZ_TO_CYCLE(mhertz) ((1000000000) / ((mhertz) / 1000)) -#define ESP_TICK(ccf, cycle) ((7682 * (ccf) * (cycle) / 1000)) - -#endif /* !(_SPARC_ESP_H) */ diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c new file mode 100644 index 00000000000..99ce03331b6 --- /dev/null +++ b/drivers/scsi/esp_scsi.c @@ -0,0 +1,2711 @@ +/* esp_scsi.c: ESP SCSI driver. + * + * Copyright (C) 2007 David S. Miller (davem@davemloft.net) + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/list.h> +#include <linux/completion.h> +#include <linux/kallsyms.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/irqreturn.h> + +#include <asm/irq.h> +#include <asm/io.h> +#include <asm/dma.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_tcq.h> +#include <scsi/scsi_dbg.h> +#include <scsi/scsi_transport_spi.h> + +#include "esp_scsi.h" + +#define DRV_MODULE_NAME "esp" +#define PFX DRV_MODULE_NAME ": " +#define DRV_VERSION "2.000" +#define DRV_MODULE_RELDATE "April 19, 2007" + +/* SCSI bus reset settle time in seconds. */ +static int esp_bus_reset_settle = 3; + +static u32 esp_debug; +#define ESP_DEBUG_INTR 0x00000001 +#define ESP_DEBUG_SCSICMD 0x00000002 +#define ESP_DEBUG_RESET 0x00000004 +#define ESP_DEBUG_MSGIN 0x00000008 +#define ESP_DEBUG_MSGOUT 0x00000010 +#define ESP_DEBUG_CMDDONE 0x00000020 +#define ESP_DEBUG_DISCONNECT 0x00000040 +#define ESP_DEBUG_DATASTART 0x00000080 +#define ESP_DEBUG_DATADONE 0x00000100 +#define ESP_DEBUG_RECONNECT 0x00000200 +#define ESP_DEBUG_AUTOSENSE 0x00000400 + +#define esp_log_intr(f, a...) \ +do { if (esp_debug & ESP_DEBUG_INTR) \ + printk(f, ## a); \ +} while (0) + +#define esp_log_reset(f, a...) \ +do { if (esp_debug & ESP_DEBUG_RESET) \ + printk(f, ## a); \ +} while (0) + +#define esp_log_msgin(f, a...) \ +do { if (esp_debug & ESP_DEBUG_MSGIN) \ + printk(f, ## a); \ +} while (0) + +#define esp_log_msgout(f, a...) \ +do { if (esp_debug & ESP_DEBUG_MSGOUT) \ + printk(f, ## a); \ +} while (0) + +#define esp_log_cmddone(f, a...) \ +do { if (esp_debug & ESP_DEBUG_CMDDONE) \ + printk(f, ## a); \ +} while (0) + +#define esp_log_disconnect(f, a...) \ +do { if (esp_debug & ESP_DEBUG_DISCONNECT) \ + printk(f, ## a); \ +} while (0) + +#define esp_log_datastart(f, a...) \ +do { if (esp_debug & ESP_DEBUG_DATASTART) \ + printk(f, ## a); \ +} while (0) + +#define esp_log_datadone(f, a...) \ +do { if (esp_debug & ESP_DEBUG_DATADONE) \ + printk(f, ## a); \ +} while (0) + +#define esp_log_reconnect(f, a...) \ +do { if (esp_debug & ESP_DEBUG_RECONNECT) \ + printk(f, ## a); \ +} while (0) + +#define esp_log_autosense(f, a...) \ +do { if (esp_debug & ESP_DEBUG_AUTOSENSE) \ + printk(f, ## a); \ +} while (0) + +#define esp_read8(REG) esp->ops->esp_read8(esp, REG) +#define esp_write8(VAL,REG) esp->ops->esp_write8(esp, VAL, REG) + +static void esp_log_fill_regs(struct esp *esp, + struct esp_event_ent *p) +{ + p->sreg = esp->sreg; + p->seqreg = esp->seqreg; + p->sreg2 = esp->sreg2; + p->ireg = esp->ireg; + p->select_state = esp->select_state; + p->event = esp->event; +} + +void scsi_esp_cmd(struct esp *esp, u8 val) +{ + struct esp_event_ent *p; + int idx = esp->esp_event_cur; + + p = &esp->esp_event_log[idx]; + p->type = ESP_EVENT_TYPE_CMD; + p->val = val; + esp_log_fill_regs(esp, p); + + esp->esp_event_cur = (idx + 1) & (ESP_EVENT_LOG_SZ - 1); + + esp_write8(val, ESP_CMD); +} +EXPORT_SYMBOL(scsi_esp_cmd); + +static void esp_event(struct esp *esp, u8 val) +{ + struct esp_event_ent *p; + int idx = esp->esp_event_cur; + + p = &esp->esp_event_log[idx]; + p->type = ESP_EVENT_TYPE_EVENT; + p->val = val; + esp_log_fill_regs(esp, p); + + esp->esp_event_cur = (idx + 1) & (ESP_EVENT_LOG_SZ - 1); + + esp->event = val; +} + +static void esp_dump_cmd_log(struct esp *esp) +{ + int idx = esp->esp_event_cur; + int stop = idx; + + printk(KERN_INFO PFX "esp%d: Dumping command log\n", + esp->host->unique_id); + do { + struct esp_event_ent *p = &esp->esp_event_log[idx]; + + printk(KERN_INFO PFX "esp%d: ent[%d] %s ", + esp->host->unique_id, idx, + p->type == ESP_EVENT_TYPE_CMD ? "CMD" : "EVENT"); + + printk("val[%02x] sreg[%02x] seqreg[%02x] " + "sreg2[%02x] ireg[%02x] ss[%02x] event[%02x]\n", + p->val, p->sreg, p->seqreg, + p->sreg2, p->ireg, p->select_state, p->event); + + idx = (idx + 1) & (ESP_EVENT_LOG_SZ - 1); + } while (idx != stop); +} + +static void esp_flush_fifo(struct esp *esp) +{ + scsi_esp_cmd(esp, ESP_CMD_FLUSH); + if (esp->rev == ESP236) { + int lim = 1000; + + while (esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES) { + if (--lim == 0) { + printk(KERN_ALERT PFX "esp%d: ESP_FF_BYTES " + "will not clear!\n", + esp->host->unique_id); + break; + } + udelay(1); + } + } +} + +static void hme_read_fifo(struct esp *esp) +{ + int fcnt = esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES; + int idx = 0; + + while (fcnt--) { + esp->fifo[idx++] = esp_read8(ESP_FDATA); + esp->fifo[idx++] = esp_read8(ESP_FDATA); + } + if (esp->sreg2 & ESP_STAT2_F1BYTE) { + esp_write8(0, ESP_FDATA); + esp->fifo[idx++] = esp_read8(ESP_FDATA); + scsi_esp_cmd(esp, ESP_CMD_FLUSH); + } + esp->fifo_cnt = idx; +} + +static void esp_set_all_config3(struct esp *esp, u8 val) +{ + int i; + + for (i = 0; i < ESP_MAX_TARGET; i++) + esp->target[i].esp_config3 = val; +} + +/* Reset the ESP chip, _not_ the SCSI bus. */ +static void esp_reset_esp(struct esp *esp) +{ + u8 family_code, version; + + /* Now reset the ESP chip */ + scsi_esp_cmd(esp, ESP_CMD_RC); + scsi_esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA); + scsi_esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA); + + /* Reload the configuration registers */ + esp_write8(esp->cfact, ESP_CFACT); + + esp->prev_stp = 0; + esp_write8(esp->prev_stp, ESP_STP); + + esp->prev_soff = 0; + esp_write8(esp->prev_soff, ESP_SOFF); + + esp_write8(esp->neg_defp, ESP_TIMEO); + + /* This is the only point at which it is reliable to read + * the ID-code for a fast ESP chip variants. + */ + esp->max_period = ((35 * esp->ccycle) / 1000); + if (esp->rev == FAST) { + version = esp_read8(ESP_UID); + family_code = (version & 0xf8) >> 3; + if (family_code == 0x02) + esp->rev = FAS236; + else if (family_code == 0x0a) + esp->rev = FASHME; /* Version is usually '5'. */ + else + esp->rev = FAS100A; + esp->min_period = ((4 * esp->ccycle) / 1000); + } else { + esp->min_period = ((5 * esp->ccycle) / 1000); + } + esp->max_period = (esp->max_period + 3)>>2; + esp->min_period = (esp->min_period + 3)>>2; + + esp_write8(esp->config1, ESP_CFG1); + switch (esp->rev) { + case ESP100: + /* nothing to do */ + break; + + case ESP100A: + esp_write8(esp->config2, ESP_CFG2); + break; + + case ESP236: + /* Slow 236 */ + esp_write8(esp->config2, ESP_CFG2); + esp->prev_cfg3 = esp->target[0].esp_config3; + esp_write8(esp->prev_cfg3, ESP_CFG3); + break; + + case FASHME: + esp->config2 |= (ESP_CONFIG2_HME32 | ESP_CONFIG2_HMEFENAB); + /* fallthrough... */ + + case FAS236: + /* Fast 236 or HME */ + esp_write8(esp->config2, ESP_CFG2); + if (esp->rev == FASHME) { + u8 cfg3 = esp->target[0].esp_config3; + + cfg3 |= ESP_CONFIG3_FCLOCK | ESP_CONFIG3_OBPUSH; + if (esp->scsi_id >= 8) + cfg3 |= ESP_CONFIG3_IDBIT3; + esp_set_all_config3(esp, cfg3); + } else { + u32 cfg3 = esp->target[0].esp_config3; + + cfg3 |= ESP_CONFIG3_FCLK; + esp_set_all_config3(esp, cfg3); + } + esp->prev_cfg3 = esp->target[0].esp_config3; + esp_write8(esp->prev_cfg3, ESP_CFG3); + if (esp->rev == FASHME) { + esp->radelay = 80; + } else { + if (esp->flags & ESP_FLAG_DIFFERENTIAL) + esp->radelay = 0; + else + esp->radelay = 96; + } + break; + + case FAS100A: + /* Fast 100a */ + esp_write8(esp->config2, ESP_CFG2); + esp_set_all_config3(esp, + (esp->target[0].esp_config3 | + ESP_CONFIG3_FCLOCK)); + esp->prev_cfg3 = esp->target[0].esp_config3; + esp_write8(esp->prev_cfg3, ESP_CFG3); + esp->radelay = 32; + break; + + default: + break; + } + + /* Eat any bitrot in the chip */ + esp_read8(ESP_INTRPT); + udelay(100); +} + +static void esp_map_dma(struct esp *esp, struct scsi_cmnd *cmd) +{ + struct esp_cmd_priv *spriv = ESP_CMD_PRIV(cmd); + struct scatterlist *sg = cmd->request_buffer; + int dir = cmd->sc_data_direction; + int total, i; + + if (dir == DMA_NONE) + return; + + BUG_ON(cmd->use_sg == 0); + + spriv->u.num_sg = esp->ops->map_sg(esp, sg, + cmd->use_sg, dir); + spriv->cur_residue = sg_dma_len(sg); + spriv->cur_sg = sg; + + total = 0; + for (i = 0; i < spriv->u.num_sg; i++) + total += sg_dma_len(&sg[i]); + spriv->tot_residue = total; +} + +static dma_addr_t esp_cur_dma_addr(struct esp_cmd_entry *ent, + struct scsi_cmnd *cmd) +{ + struct esp_cmd_priv *p = ESP_CMD_PRIV(cmd); + + if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { + return ent->sense_dma + + (ent->sense_ptr - cmd->sense_buffer); + } + + return sg_dma_address(p->cur_sg) + + (sg_dma_len(p->cur_sg) - + p->cur_residue); +} + +static unsigned int esp_cur_dma_len(struct esp_cmd_entry *ent, + struct scsi_cmnd *cmd) +{ + struct esp_cmd_priv *p = ESP_CMD_PRIV(cmd); + + if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { + return SCSI_SENSE_BUFFERSIZE - + (ent->sense_ptr - cmd->sense_buffer); + } + return p->cur_residue; +} + +static void esp_advance_dma(struct esp *esp, struct esp_cmd_entry *ent, + struct scsi_cmnd *cmd, unsigned int len) +{ + struct esp_cmd_priv *p = ESP_CMD_PRIV(cmd); + + if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { + ent->sense_ptr += len; + return; + } + + p->cur_residue -= len; + p->tot_residue -= len; + if (p->cur_residue < 0 || p->tot_residue < 0) { + printk(KERN_ERR PFX "esp%d: Data transfer overflow.\n", + esp->host->unique_id); + printk(KERN_ERR PFX "esp%d: cur_residue[%d] tot_residue[%d] " + "len[%u]\n", + esp->host->unique_id, + p->cur_residue, p->tot_residue, len); + p->cur_residue = 0; + p->tot_residue = 0; + } + if (!p->cur_residue && p->tot_residue) { + p->cur_sg++; + p->cur_residue = sg_dma_len(p->cur_sg); + } +} + +static void esp_unmap_dma(struct esp *esp, struct scsi_cmnd *cmd) +{ + struct esp_cmd_priv *spriv = ESP_CMD_PRIV(cmd); + int dir = cmd->sc_data_direction; + + if (dir == DMA_NONE) + return; + + esp->ops->unmap_sg(esp, cmd->request_buffer, + spriv->u.num_sg, dir); +} + +static void esp_save_pointers(struct esp *esp, struct esp_cmd_entry *ent) +{ + struct scsi_cmnd *cmd = ent->cmd; + struct esp_cmd_priv *spriv = ESP_CMD_PRIV(cmd); + + if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { + ent->saved_sense_ptr = ent->sense_ptr; + return; + } + ent->saved_cur_residue = spriv->cur_residue; + ent->saved_cur_sg = spriv->cur_sg; + ent->saved_tot_residue = spriv->tot_residue; +} + +static void esp_restore_pointers(struct esp *esp, struct esp_cmd_entry *ent) +{ + struct scsi_cmnd *cmd = ent->cmd; + struct esp_cmd_priv *spriv = ESP_CMD_PRIV(cmd); + + if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { + ent->sense_ptr = ent->saved_sense_ptr; + return; + } + spriv->cur_residue = ent->saved_cur_residue; + spriv->cur_sg = ent->saved_cur_sg; + spriv->tot_residue = ent->saved_tot_residue; +} + +static void esp_check_command_len(struct esp *esp, struct scsi_cmnd *cmd) +{ + if (cmd->cmd_len == 6 || + cmd->cmd_len == 10 || + cmd->cmd_len == 12) { + esp->flags &= ~ESP_FLAG_DOING_SLOWCMD; + } else { + esp->flags |= ESP_FLAG_DOING_SLOWCMD; + } +} + +static void esp_write_tgt_config3(struct esp *esp, int tgt) +{ + if (esp->rev > ESP100A) { + u8 val = esp->target[tgt].esp_config3; + + if (val != esp->prev_cfg3) { + esp->prev_cfg3 = val; + esp_write8(val, ESP_CFG3); + } + } +} + +static void esp_write_tgt_sync(struct esp *esp, int tgt) +{ + u8 off = esp->target[tgt].esp_offset; + u8 per = esp->target[tgt].esp_period; + + if (off != esp->prev_soff) { + esp->prev_soff = off; + esp_write8(off, ESP_SOFF); + } + if (per != esp->prev_stp) { + esp->prev_stp = per; + esp_write8(per, ESP_STP); + } +} + +static u32 esp_dma_length_limit(struct esp *esp, u32 dma_addr, u32 dma_len) +{ + if (esp->rev == FASHME) { + /* Arbitrary segment boundaries, 24-bit counts. */ + if (dma_len > (1U << 24)) + dma_len = (1U << 24); + } else { + u32 base, end; + + /* ESP chip limits other variants by 16-bits of transfer + * count. Actually on FAS100A and FAS236 we could get + * 24-bits of transfer count by enabling ESP_CONFIG2_FENAB + * in the ESP_CFG2 register but that causes other unwanted + * changes so we don't use it currently. + */ + if (dma_len > (1U << 16)) + dma_len = (1U << 16); + + /* All of the DMA variants hooked up to these chips + * cannot handle crossing a 24-bit address boundary. + */ + base = dma_addr & ((1U << 24) - 1U); + end = base + dma_len; + if (end > (1U << 24)) + end = (1U <<24); + dma_len = end - base; + } + return dma_len; +} + +static int esp_need_to_nego_wide(struct esp_target_data *tp) +{ + struct scsi_target *target = tp->starget; + + return spi_width(target) != tp->nego_goal_width; +} + +static int esp_need_to_nego_sync(struct esp_target_data *tp) +{ + struct scsi_target *target = tp->starget; + + /* When offset is zero, period is "don't care". */ + if (!spi_offset(target) && !tp->nego_goal_offset) + return 0; + + if (spi_offset(target) == tp->nego_goal_offset && + spi_period(target) == tp->nego_goal_period) + return 0; + + return 1; +} + +static int esp_alloc_lun_tag(struct esp_cmd_entry *ent, + struct esp_lun_data *lp) +{ + if (!ent->tag[0]) { + /* Non-tagged, slot already taken? */ + if (lp->non_tagged_cmd) + return -EBUSY; + + if (lp->hold) { + /* We are being held by active tagged + * commands. + */ + if (lp->num_tagged) + return -EBUSY; + + /* Tagged commands completed, we can unplug + * the queue and run this untagged command. + */ + lp->hold = 0; + } else if (lp->num_tagged) { + /* Plug the queue until num_tagged decreases + * to zero in esp_free_lun_tag. + */ + lp->hold = 1; + return -EBUSY; + } + + lp->non_tagged_cmd = ent; + return 0; + } else { + /* Tagged command, see if blocked by a + * non-tagged one. + */ + if (lp->non_tagged_cmd || lp->hold) + return -EBUSY; + } + + BUG_ON(lp->tagged_cmds[ent->tag[1]]); + + lp->tagged_cmds[ent->tag[1]] = ent; + lp->num_tagged++; + + return 0; +} + +static void esp_free_lun_tag(struct esp_cmd_entry *ent, + struct esp_lun_data *lp) +{ + if (ent->tag[0]) { + BUG_ON(lp->tagged_cmds[ent->tag[1]] != ent); + lp->tagged_cmds[ent->tag[1]] = NULL; + lp->num_tagged--; + } else { + BUG_ON(lp->non_tagged_cmd != ent); + lp->non_tagged_cmd = NULL; + } +} + +/* When a contingent allegiance conditon is created, we force feed a + * REQUEST_SENSE command to the device to fetch the sense data. I + * tried many other schemes, relying on the scsi error handling layer + * to send out the REQUEST_SENSE automatically, but this was difficult + * to get right especially in the presence of applications like smartd + * which use SG_IO to send out their own REQUEST_SENSE commands. + */ +static void esp_autosense(struct esp *esp, struct esp_cmd_entry *ent) +{ + struct scsi_cmnd *cmd = ent->cmd; + struct scsi_device *dev = cmd->device; + int tgt, lun; + u8 *p, val; + + tgt = dev->id; + lun = dev->lun; + + + if (!ent->sense_ptr) { + esp_log_autosense("esp%d: Doing auto-sense for " + "tgt[%d] lun[%d]\n", + esp->host->unique_id, tgt, lun); + + ent->sense_ptr = cmd->sense_buffer; + ent->sense_dma = esp->ops->map_single(esp, + ent->sense_ptr, + SCSI_SENSE_BUFFERSIZE, + DMA_FROM_DEVICE); + } + ent->saved_sense_ptr = ent->sense_ptr; + + esp->active_cmd = ent; + + p = esp->command_block; + esp->msg_out_len = 0; + + *p++ = IDENTIFY(0, lun); + *p++ = REQUEST_SENSE; + *p++ = ((dev->scsi_level <= SCSI_2) ? + (lun << 5) : 0); + *p++ = 0; + *p++ = 0; + *p++ = SCSI_SENSE_BUFFERSIZE; + *p++ = 0; + + esp->select_state = ESP_SELECT_BASIC; + + val = tgt; + if (esp->rev == FASHME) + val |= ESP_BUSID_RESELID | ESP_BUSID_CTR32BIT; + esp_write8(val, ESP_BUSID); + + esp_write_tgt_sync(esp, tgt); + esp_write_tgt_config3(esp, tgt); + + val = (p - esp->command_block); + + if (esp->rev == FASHME) + scsi_esp_cmd(esp, ESP_CMD_FLUSH); + esp->ops->send_dma_cmd(esp, esp->command_block_dma, + val, 16, 0, ESP_CMD_DMA | ESP_CMD_SELA); +} + +static struct esp_cmd_entry *find_and_prep_issuable_command(struct esp *esp) +{ + struct esp_cmd_entry *ent; + + list_for_each_entry(ent, &esp->queued_cmds, list) { + struct scsi_cmnd *cmd = ent->cmd; + struct scsi_device *dev = cmd->device; + struct esp_lun_data *lp = dev->hostdata; + + if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { + ent->tag[0] = 0; + ent->tag[1] = 0; + return ent; + } + + if (!scsi_populate_tag_msg(cmd, &ent->tag[0])) { + ent->tag[0] = 0; + ent->tag[1] = 0; + } + + if (esp_alloc_lun_tag(ent, lp) < 0) + continue; + + return ent; + } + + return NULL; +} + +static void esp_maybe_execute_command(struct esp *esp) +{ + struct esp_target_data *tp; + struct esp_lun_data *lp; + struct scsi_device *dev; + struct scsi_cmnd *cmd; + struct esp_cmd_entry *ent; + int tgt, lun, i; + u32 val, start_cmd; + u8 *p; + + if (esp->active_cmd || + (esp->flags & ESP_FLAG_RESETTING)) + return; + + ent = find_and_prep_issuable_command(esp); + if (!ent) + return; + + if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { + esp_autosense(esp, ent); + return; + } + + cmd = ent->cmd; + dev = cmd->device; + tgt = dev->id; + lun = dev->lun; + tp = &esp->target[tgt]; + lp = dev->hostdata; + + list_del(&ent->list); + list_add(&ent->list, &esp->active_cmds); + + esp->active_cmd = ent; + + esp_map_dma(esp, cmd); + esp_save_pointers(esp, ent); + + esp_check_command_len(esp, cmd); + + p = esp->command_block; + + esp->msg_out_len = 0; + if (tp->flags & ESP_TGT_CHECK_NEGO) { + /* Need to negotiate. If the target is broken + * go for synchronous transfers and non-wide. + */ + if (tp->flags & ESP_TGT_BROKEN) { + tp->flags &= ~ESP_TGT_DISCONNECT; + tp->nego_goal_period = 0; + tp->nego_goal_offset = 0; + tp->nego_goal_width = 0; + tp->nego_goal_tags = 0; + } + + /* If the settings are not changing, skip this. */ + if (spi_width(tp->starget) == tp->nego_goal_width && + spi_period(tp->starget) == tp->nego_goal_period && + spi_offset(tp->starget) == tp->nego_goal_offset) { + tp->flags &= ~ESP_TGT_CHECK_NEGO; + goto build_identify; + } + + if (esp->rev == FASHME && esp_need_to_nego_wide(tp)) { + esp->msg_out_len = + spi_populate_width_msg(&esp->msg_out[0], + (tp->nego_goal_width ? + 1 : 0)); + tp->flags |= ESP_TGT_NEGO_WIDE; + } else if (esp_need_to_nego_sync(tp)) { + esp->msg_out_len = + spi_populate_sync_msg(&esp->msg_out[0], + tp->nego_goal_period, + tp->nego_goal_offset); + tp->flags |= ESP_TGT_NEGO_SYNC; + } else { + tp->flags &= ~ESP_TGT_CHECK_NEGO; + } + + /* Process it like a slow command. */ + if (tp->flags & (ESP_TGT_NEGO_WIDE | ESP_TGT_NEGO_SYNC)) + esp->flags |= ESP_FLAG_DOING_SLOWCMD; + } + +build_identify: + /* If we don't have a lun-data struct yet, we're probing + * so do not disconnect. Also, do not disconnect unless + * we have a tag on this command. + */ + if (lp && (tp->flags & ESP_TGT_DISCONNECT) && ent->tag[0]) + *p++ = IDENTIFY(1, lun); + else + *p++ = IDENTIFY(0, lun); + + if (ent->tag[0] && esp->rev == ESP100) { + /* ESP100 lacks select w/atn3 command, use select + * and stop instead. + */ + esp->flags |= ESP_FLAG_DOING_SLOWCMD; + } + + if (!(esp->flags & ESP_FLAG_DOING_SLOWCMD)) { + start_cmd = ESP_CMD_DMA | ESP_CMD_SELA; + if (ent->tag[0]) { + *p++ = ent->tag[0]; + *p++ = ent->tag[1]; + + start_cmd = ESP_CMD_DMA | ESP_CMD_SA3; + } + + for (i = 0; i < cmd->cmd_len; i++) + *p++ = cmd->cmnd[i]; + + esp->select_state = ESP_SELECT_BASIC; + } else { + esp->cmd_bytes_left = cmd->cmd_len; + esp->cmd_bytes_ptr = &cmd->cmnd[0]; + + if (ent->tag[0]) { + for (i = esp->msg_out_len - 1; + i >= 0; i--) + esp->msg_out[i + 2] = esp->msg_out[i]; + esp->msg_out[0] = ent->tag[0]; + esp->msg_out[1] = ent->tag[1]; + esp->msg_out_len += 2; + } + + start_cmd = ESP_CMD_DMA | ESP_CMD_SELAS; + esp->select_state = ESP_SELECT_MSGOUT; + } + val = tgt; + if (esp->rev == FASHME) + val |= ESP_BUSID_RESELID | ESP_BUSID_CTR32BIT; + esp_write8(val, ESP_BUSID); + + esp_write_tgt_sync(esp, tgt); + esp_write_tgt_config3(esp, tgt); + + val = (p - esp->command_block); + + if (esp_debug & ESP_DEBUG_SCSICMD) { + printk("ESP: tgt[%d] lun[%d] scsi_cmd [ ", tgt, lun); + for (i = 0; i < cmd->cmd_len; i++) + printk("%02x ", cmd->cmnd[i]); + printk("]\n"); + } + + if (esp->rev == FASHME) + scsi_esp_cmd(esp, ESP_CMD_FLUSH); + esp->ops->send_dma_cmd(esp, esp->command_block_dma, + val, 16, 0, start_cmd); +} + +static struct esp_cmd_entry *esp_get_ent(struct esp *esp) +{ + struct list_head *head = &esp->esp_cmd_pool; + struct esp_cmd_entry *ret; + + if (list_empty(head)) { + ret = kzalloc(sizeof(struct esp_cmd_entry), GFP_ATOMIC); + } else { + ret = list_entry(head->next, struct esp_cmd_entry, list); + list_del(&ret->list); + memset(ret, 0, sizeof(*ret)); + } + return ret; +} + +static void esp_put_ent(struct esp *esp, struct esp_cmd_entry *ent) +{ + list_add(&ent->list, &esp->esp_cmd_pool); +} + +static void esp_cmd_is_done(struct esp *esp, struct esp_cmd_entry *ent, + struct scsi_cmnd *cmd, unsigned int result) +{ + struct scsi_device *dev = cmd->device; + int tgt = dev->id; + int lun = dev->lun; + + esp->active_cmd = NULL; + esp_unmap_dma(esp, cmd); + esp_free_lun_tag(ent, dev->hostdata); + cmd->result = result; + + if (ent->eh_done) { + complete(ent->eh_done); + ent->eh_done = NULL; + } + + if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { + esp->ops->unmap_single(esp, ent->sense_dma, + SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); + ent->sense_ptr = NULL; + + /* Restore the message/status bytes to what we actually + * saw originally. Also, report that we are providing + * the sense data. + */ + cmd->result = ((DRIVER_SENSE << 24) | + (DID_OK << 16) | + (COMMAND_COMPLETE << 8) | + (SAM_STAT_CHECK_CONDITION << 0)); + + ent->flags &= ~ESP_CMD_FLAG_AUTOSENSE; + if (esp_debug & ESP_DEBUG_AUTOSENSE) { + int i; + + printk("esp%d: tgt[%d] lun[%d] AUTO SENSE[ ", + esp->host->unique_id, tgt, lun); + for (i = 0; i < 18; i++) + printk("%02x ", cmd->sense_buffer[i]); + printk("]\n"); + } + } + + cmd->scsi_done(cmd); + + list_del(&ent->list); + esp_put_ent(esp, ent); + + esp_maybe_execute_command(esp); +} + +static unsigned int compose_result(unsigned int status, unsigned int message, + unsigned int driver_code) +{ + return (status | (message << 8) | (driver_code << 16)); +} + +static void esp_event_queue_full(struct esp *esp, struct esp_cmd_entry *ent) +{ + struct scsi_device *dev = ent->cmd->device; + struct esp_lun_data *lp = dev->hostdata; + + scsi_track_queue_full(dev, lp->num_tagged - 1); +} + +static int esp_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) +{ + struct scsi_device *dev = cmd->device; + struct esp *esp = host_to_esp(dev->host); + struct esp_cmd_priv *spriv; + struct esp_cmd_entry *ent; + + ent = esp_get_ent(esp); + if (!ent) + return SCSI_MLQUEUE_HOST_BUSY; + + ent->cmd = cmd; + + cmd->scsi_done = done; + + spriv = ESP_CMD_PRIV(cmd); + spriv->u.dma_addr = ~(dma_addr_t)0x0; + + list_add_tail(&ent->list, &esp->queued_cmds); + + esp_maybe_execute_command(esp); + + return 0; +} + +static int esp_check_gross_error(struct esp *esp) +{ + if (esp->sreg & ESP_STAT_SPAM) { + /* Gross Error, could be one of: + * - top of fifo overwritten + * - top of command register overwritten + * - DMA programmed with wrong direction + * - improper phase change + */ + printk(KERN_ERR PFX "esp%d: Gross error sreg[%02x]\n", + esp->host->unique_id, esp->sreg); + /* XXX Reset the chip. XXX */ + return 1; + } + return 0; +} + +static int esp_check_spur_intr(struct esp *esp) +{ + switch (esp->rev) { + case ESP100: + case ESP100A: + /* The interrupt pending bit of the status register cannot + * be trusted on these revisions. + */ + esp->sreg &= ~ESP_STAT_INTR; + break; + + default: + if (!(esp->sreg & ESP_STAT_INTR)) { + esp->ireg = esp_read8(ESP_INTRPT); + if (esp->ireg & ESP_INTR_SR) + return 1; + + /* If the DMA is indicating interrupt pending and the + * ESP is not, the only possibility is a DMA error. + */ + if (!esp->ops->dma_error(esp)) { + printk(KERN_ERR PFX "esp%d: Spurious irq, " + "sreg=%x.\n", + esp->host->unique_id, esp->sreg); + return -1; + } + + printk(KERN_ERR PFX "esp%d: DMA error\n", + esp->host->unique_id); + + /* XXX Reset the chip. XXX */ + return -1; + } + break; + } + + return 0; +} + +static void esp_schedule_reset(struct esp *esp) +{ + esp_log_reset("ESP: esp_schedule_reset() from %p\n", + __builtin_return_address(0)); + esp->flags |= ESP_FLAG_RESETTING; + esp_event(esp, ESP_EVENT_RESET); +} + +/* In order to avoid having to add a special half-reconnected state + * into the driver we just sit here and poll through the rest of + * the reselection process to get the tag message bytes. + */ +static struct esp_cmd_entry *esp_reconnect_with_tag(struct esp *esp, + struct esp_lun_data *lp) +{ + struct esp_cmd_entry *ent; + int i; + + if (!lp->num_tagged) { + printk(KERN_ERR PFX "esp%d: Reconnect w/num_tagged==0\n", + esp->host->unique_id); + return NULL; + } + + esp_log_reconnect("ESP: reconnect tag, "); + + for (i = 0; i < ESP_QUICKIRQ_LIMIT; i++) { + if (esp->ops->irq_pending(esp)) + break; + } + if (i == ESP_QUICKIRQ_LIMIT) { + printk(KERN_ERR PFX "esp%d: Reconnect IRQ1 timeout\n", + esp->host->unique_id); + return NULL; + } + + esp->sreg = esp_read8(ESP_STATUS); + esp->ireg = esp_read8(ESP_INTRPT); + + esp_log_reconnect("IRQ(%d:%x:%x), ", + i, esp->ireg, esp->sreg); + + if (esp->ireg & ESP_INTR_DC) { + printk(KERN_ERR PFX "esp%d: Reconnect, got disconnect.\n", + esp->host->unique_id); + return NULL; + } + + if ((esp->sreg & ESP_STAT_PMASK) != ESP_MIP) { + printk(KERN_ERR PFX "esp%d: Reconnect, not MIP sreg[%02x].\n", + esp->host->unique_id, esp->sreg); + return NULL; + } + + /* DMA in the tag bytes... */ + esp->command_block[0] = 0xff; + esp->command_block[1] = 0xff; + esp->ops->send_dma_cmd(esp, esp->command_block_dma, + 2, 2, 1, ESP_CMD_DMA | ESP_CMD_TI); + + /* ACK the msssage. */ + scsi_esp_cmd(esp, ESP_CMD_MOK); + + for (i = 0; i < ESP_RESELECT_TAG_LIMIT; i++) { + if (esp->ops->irq_pending(esp)) { + esp->sreg = esp_read8(ESP_STATUS); + esp->ireg = esp_read8(ESP_INTRPT); + if (esp->ireg & ESP_INTR_FDONE) + break; + } + udelay(1); + } + if (i == ESP_RESELECT_TAG_LIMIT) { + printk(KERN_ERR PFX "esp%d: Reconnect IRQ2 timeout\n", + esp->host->unique_id); + return NULL; + } + esp->ops->dma_drain(esp); + esp->ops->dma_invalidate(esp); + + esp_log_reconnect("IRQ2(%d:%x:%x) tag[%x:%x]\n", + i, esp->ireg, esp->sreg, + esp->command_block[0], + esp->command_block[1]); + + if (esp->command_block[0] < SIMPLE_QUEUE_TAG || + esp->command_block[0] > ORDERED_QUEUE_TAG) { + printk(KERN_ERR PFX "esp%d: Reconnect, bad tag " + "type %02x.\n", + esp->host->unique_id, esp->command_block[0]); + return NULL; + } + + ent = lp->tagged_cmds[esp->command_block[1]]; + if (!ent) { + printk(KERN_ERR PFX "esp%d: Reconnect, no entry for " + "tag %02x.\n", + esp->host->unique_id, esp->command_block[1]); + return NULL; + } + + return ent; +} + +static int esp_reconnect(struct esp *esp) +{ + struct esp_cmd_entry *ent; + struct esp_target_data *tp; + struct esp_lun_data *lp; + struct scsi_device *dev; + int target, lun; + + BUG_ON(esp->active_cmd); + if (esp->rev == FASHME) { + /* FASHME puts the target and lun numbers directly + * into the fifo. + */ + target = esp->fifo[0]; + lun = esp->fifo[1] & 0x7; + } else { + u8 bits = esp_read8(ESP_FDATA); + + /* Older chips put the lun directly into the fifo, but + * the target is given as a sample of the arbitration + * lines on the bus at reselection time. So we should + * see the ID of the ESP and the one reconnecting target + * set in the bitmap. + */ + if (!(bits & esp->scsi_id_mask)) + goto do_reset; + bits &= ~esp->scsi_id_mask; + if (!bits || (bits & (bits - 1))) + goto do_reset; + + target = ffs(bits) - 1; + lun = (esp_read8(ESP_FDATA) & 0x7); + + scsi_esp_cmd(esp, ESP_CMD_FLUSH); + if (esp->rev == ESP100) { + u8 ireg = esp_read8(ESP_INTRPT); + /* This chip has a bug during reselection that can + * cause a spurious illegal-command interrupt, which + * we simply ACK here. Another possibility is a bus + * reset so we must check for that. + */ + if (ireg & ESP_INTR_SR) + goto do_reset; + } + scsi_esp_cmd(esp, ESP_CMD_NULL); + } + + esp_write_tgt_sync(esp, target); + esp_write_tgt_config3(esp, target); + + scsi_esp_cmd(esp, ESP_CMD_MOK); + + if (esp->rev == FASHME) + esp_write8(target | ESP_BUSID_RESELID | ESP_BUSID_CTR32BIT, + ESP_BUSID); + + tp = &esp->target[target]; + dev = __scsi_device_lookup_by_target(tp->starget, lun); + if (!dev) { + printk(KERN_ERR PFX "esp%d: Reconnect, no lp " + "tgt[%u] lun[%u]\n", + esp->host->unique_id, target, lun); + goto do_reset; + } + lp = dev->hostdata; + + ent = lp->non_tagged_cmd; + if (!ent) { + ent = esp_reconnect_with_tag(esp, lp); + if (!ent) + goto do_reset; + } + + esp->active_cmd = ent; + + if (ent->flags & ESP_CMD_FLAG_ABORT) { + esp->msg_out[0] = ABORT_TASK_SET; + esp->msg_out_len = 1; + scsi_esp_cmd(esp, ESP_CMD_SATN); + } + + esp_event(esp, ESP_EVENT_CHECK_PHASE); + esp_restore_pointers(esp, ent); + esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; + return 1; + +do_reset: + esp_schedule_reset(esp); + return 0; +} + +static int esp_finish_select(struct esp *esp) +{ + struct esp_cmd_entry *ent; + struct scsi_cmnd *cmd; + u8 orig_select_state; + + orig_select_state = esp->select_state; + + /* No longer selecting. */ + esp->select_state = ESP_SELECT_NONE; + + esp->seqreg = esp_read8(ESP_SSTEP) & ESP_STEP_VBITS; + ent = esp->active_cmd; + cmd = ent->cmd; + + if (esp->ops->dma_error(esp)) { + /* If we see a DMA error during or as a result of selection, + * all bets are off. + */ + esp_schedule_reset(esp); + esp_cmd_is_done(esp, ent, cmd, (DID_ERROR << 16)); + return 0; + } + + esp->ops->dma_invalidate(esp); + + if (esp->ireg == (ESP_INTR_RSEL | ESP_INTR_FDONE)) { + struct esp_target_data *tp = &esp->target[cmd->device->id]; + + /* Carefully back out of the selection attempt. Release + * resources (such as DMA mapping & TAG) and reset state (such + * as message out and command delivery variables). + */ + if (!(ent->flags & ESP_CMD_FLAG_AUTOSENSE)) { + esp_unmap_dma(esp, cmd); + esp_free_lun_tag(ent, cmd->device->hostdata); + tp->flags &= ~(ESP_TGT_NEGO_SYNC | ESP_TGT_NEGO_WIDE); + esp->flags &= ~ESP_FLAG_DOING_SLOWCMD; + esp->cmd_bytes_ptr = NULL; + esp->cmd_bytes_left = 0; + } else { + esp->ops->unmap_single(esp, ent->sense_dma, + SCSI_SENSE_BUFFERSIZE, + DMA_FROM_DEVICE); + ent->sense_ptr = NULL; + } + + /* Now that the state is unwound properly, put back onto + * the issue queue. This command is no longer active. + */ + list_del(&ent->list); + list_add(&ent->list, &esp->queued_cmds); + esp->active_cmd = NULL; + + /* Return value ignored by caller, it directly invokes + * esp_reconnect(). + */ + return 0; + } + + if (esp->ireg == ESP_INTR_DC) { + struct scsi_device *dev = cmd->device; + + /* Disconnect. Make sure we re-negotiate sync and + * wide parameters if this target starts responding + * again in the future. + */ + esp->target[dev->id].flags |= ESP_TGT_CHECK_NEGO; + + scsi_esp_cmd(esp, ESP_CMD_ESEL); + esp_cmd_is_done(esp, ent, cmd, (DID_BAD_TARGET << 16)); + return 1; + } + + if (esp->ireg == (ESP_INTR_FDONE | ESP_INTR_BSERV)) { + /* Selection successful. On pre-FAST chips we have + * to do a NOP and possibly clean out the FIFO. + */ + if (esp->rev <= ESP236) { + int fcnt = esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES; + + scsi_esp_cmd(esp, ESP_CMD_NULL); + + if (!fcnt && + (!esp->prev_soff || + ((esp->sreg & ESP_STAT_PMASK) != ESP_DIP))) + esp_flush_fifo(esp); + } + + /* If we are doing a slow command, negotiation, etc. + * we'll do the right thing as we transition to the + * next phase. + */ + esp_event(esp, ESP_EVENT_CHECK_PHASE); + return 0; + } + + printk("ESP: Unexpected selection completion ireg[%x].\n", + esp->ireg); + esp_schedule_reset(esp); + return 0; +} + +static int esp_data_bytes_sent(struct esp *esp, struct esp_cmd_entry *ent, + struct scsi_cmnd *cmd) +{ + int fifo_cnt, ecount, bytes_sent, flush_fifo; + + fifo_cnt = esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES; + if (esp->prev_cfg3 & ESP_CONFIG3_EWIDE) + fifo_cnt <<= 1; + + ecount = 0; + if (!(esp->sreg & ESP_STAT_TCNT)) { + ecount = ((unsigned int)esp_read8(ESP_TCLOW) | + (((unsigned int)esp_read8(ESP_TCMED)) << 8)); + if (esp->rev == FASHME) + ecount |= ((unsigned int)esp_read8(FAS_RLO)) << 16; + } + + bytes_sent = esp->data_dma_len; + bytes_sent -= ecount; + + if (!(ent->flags & ESP_CMD_FLAG_WRITE)) + bytes_sent -= fifo_cnt; + + flush_fifo = 0; + if (!esp->prev_soff) { + /* Synchronous data transfer, always flush fifo. */ + flush_fifo = 1; + } else { + if (esp->rev == ESP100) { + u32 fflags, phase; + + /* ESP100 has a chip bug where in the synchronous data + * phase it can mistake a final long REQ pulse from the + * target as an extra data byte. Fun. + * + * To detect this case we resample the status register + * and fifo flags. If we're still in a data phase and + * we see spurious chunks in the fifo, we return error + * to the caller which should reset and set things up + * such that we only try future transfers to this + * target in synchronous mode. + */ + esp->sreg = esp_read8(ESP_STATUS); + phase = esp->sreg & ESP_STAT_PMASK; + fflags = esp_read8(ESP_FFLAGS); + + if ((phase == ESP_DOP && + (fflags & ESP_FF_ONOTZERO)) || + (phase == ESP_DIP && + (fflags & ESP_FF_FBYTES))) + return -1; + } + if (!(ent->flags & ESP_CMD_FLAG_WRITE)) + flush_fifo = 1; + } + + if (flush_fifo) + esp_flush_fifo(esp); + + return bytes_sent; +} + +static void esp_setsync(struct esp *esp, struct esp_target_data *tp, + u8 scsi_period, u8 scsi_offset, + u8 esp_stp, u8 esp_soff) +{ + spi_period(tp->starget) = scsi_period; + spi_offset(tp->starget) = scsi_offset; + spi_width(tp->starget) = (tp->flags & ESP_TGT_WIDE) ? 1 : 0; + + if (esp_soff) { + esp_stp &= 0x1f; + esp_soff |= esp->radelay; + if (esp->rev >= FAS236) { + u8 bit = ESP_CONFIG3_FSCSI; + if (esp->rev >= FAS100A) + bit = ESP_CONFIG3_FAST; + + if (scsi_period < 50) { + if (esp->rev == FASHME) + esp_soff &= ~esp->radelay; + tp->esp_config3 |= bit; + } else { + tp->esp_config3 &= ~bit; + } + esp->prev_cfg3 = tp->esp_config3; + esp_write8(esp->prev_cfg3, ESP_CFG3); + } + } + + tp->esp_period = esp->prev_stp = esp_stp; + tp->esp_offset = esp->prev_soff = esp_soff; + + esp_write8(esp_soff, ESP_SOFF); + esp_write8(esp_stp, ESP_STP); + + tp->flags &= ~(ESP_TGT_NEGO_SYNC | ESP_TGT_CHECK_NEGO); + + spi_display_xfer_agreement(tp->starget); +} + +static void esp_msgin_reject(struct esp *esp) +{ + struct esp_cmd_entry *ent = esp->active_cmd; + struct scsi_cmnd *cmd = ent->cmd; + struct esp_target_data *tp; + int tgt; + + tgt = cmd->device->id; + tp = &esp->target[tgt]; + + if (tp->flags & ESP_TGT_NEGO_WIDE) { + tp->flags &= ~(ESP_TGT_NEGO_WIDE | ESP_TGT_WIDE); + + if (!esp_need_to_nego_sync(tp)) { + tp->flags &= ~ESP_TGT_CHECK_NEGO; + scsi_esp_cmd(esp, ESP_CMD_RATN); + } else { + esp->msg_out_len = + spi_populate_sync_msg(&esp->msg_out[0], + tp->nego_goal_period, + tp->nego_goal_offset); + tp->flags |= ESP_TGT_NEGO_SYNC; + scsi_esp_cmd(esp, ESP_CMD_SATN); + } + return; + } + + if (tp->flags & ESP_TGT_NEGO_SYNC) { + tp->flags &= ~(ESP_TGT_NEGO_SYNC | ESP_TGT_CHECK_NEGO); + tp->esp_period = 0; + tp->esp_offset = 0; + esp_setsync(esp, tp, 0, 0, 0, 0); + scsi_esp_cmd(esp, ESP_CMD_RATN); + return; + } + + esp->msg_out[0] = ABORT_TASK_SET; + esp->msg_out_len = 1; + scsi_esp_cmd(esp, ESP_CMD_SATN); +} + +static void esp_msgin_sdtr(struct esp *esp, struct esp_target_data *tp) +{ + u8 period = esp->msg_in[3]; + u8 offset = esp->msg_in[4]; + u8 stp; + + if (!(tp->flags & ESP_TGT_NEGO_SYNC)) + goto do_reject; + + if (offset > 15) + goto do_reject; + + if (offset) { + int rounded_up, one_clock; + + if (period > esp->max_period) { + period = offset = 0; + goto do_sdtr; + } + if (period < esp->min_period) + goto do_reject; + + one_clock = esp->ccycle / 1000; + rounded_up = (period << 2); + rounded_up = (rounded_up + one_clock - 1) / one_clock; + stp = rounded_up; + if (stp && esp->rev >= FAS236) { + if (stp >= 50) + stp--; + } + } else { + stp = 0; + } + + esp_setsync(esp, tp, period, offset, stp, offset); + return; + +do_reject: + esp->msg_out[0] = MESSAGE_REJECT; + esp->msg_out_len = 1; + scsi_esp_cmd(esp, ESP_CMD_SATN); + return; + +do_sdtr: + tp->nego_goal_period = period; + tp->nego_goal_offset = offset; + esp->msg_out_len = + spi_populate_sync_msg(&esp->msg_out[0], + tp->nego_goal_period, + tp->nego_goal_offset); + scsi_esp_cmd(esp, ESP_CMD_SATN); +} + +static void esp_msgin_wdtr(struct esp *esp, struct esp_target_data *tp) +{ + int size = 8 << esp->msg_in[3]; + u8 cfg3; + + if (esp->rev != FASHME) + goto do_reject; + + if (size != 8 && size != 16) + goto do_reject; + + if (!(tp->flags & ESP_TGT_NEGO_WIDE)) + goto do_reject; + + cfg3 = tp->esp_config3; + if (size == 16) { + tp->flags |= ESP_TGT_WIDE; + cfg3 |= ESP_CONFIG3_EWIDE; + } else { + tp->flags &= ~ESP_TGT_WIDE; + cfg3 &= ~ESP_CONFIG3_EWIDE; + } + tp->esp_config3 = cfg3; + esp->prev_cfg3 = cfg3; + esp_write8(cfg3, ESP_CFG3); + + tp->flags &= ~ESP_TGT_NEGO_WIDE; + + spi_period(tp->starget) = 0; + spi_offset(tp->starget) = 0; + if (!esp_need_to_nego_sync(tp)) { + tp->flags &= ~ESP_TGT_CHECK_NEGO; + scsi_esp_cmd(esp, ESP_CMD_RATN); + } else { + esp->msg_out_len = + spi_populate_sync_msg(&esp->msg_out[0], + tp->nego_goal_period, + tp->nego_goal_offset); + tp->flags |= ESP_TGT_NEGO_SYNC; + scsi_esp_cmd(esp, ESP_CMD_SATN); + } + return; + +do_reject: + esp->msg_out[0] = MESSAGE_REJECT; + esp->msg_out_len = 1; + scsi_esp_cmd(esp, ESP_CMD_SATN); +} + +static void esp_msgin_extended(struct esp *esp) +{ + struct esp_cmd_entry *ent = esp->active_cmd; + struct scsi_cmnd *cmd = ent->cmd; + struct esp_target_data *tp; + int tgt = cmd->device->id; + + tp = &esp->target[tgt]; + if (esp->msg_in[2] == EXTENDED_SDTR) { + esp_msgin_sdtr(esp, tp); + return; + } + if (esp->msg_in[2] == EXTENDED_WDTR) { + esp_msgin_wdtr(esp, tp); + return; + } + + printk("ESP: Unexpected extended msg type %x\n", + esp->msg_in[2]); + + esp->msg_out[0] = ABORT_TASK_SET; + esp->msg_out_len = 1; + scsi_esp_cmd(esp, ESP_CMD_SATN); +} + +/* Analyze msgin bytes received from target so far. Return non-zero + * if there are more bytes needed to complete the message. + */ +static int esp_msgin_process(struct esp *esp) +{ + u8 msg0 = esp->msg_in[0]; + int len = esp->msg_in_len; + + if (msg0 & 0x80) { + /* Identify */ + printk("ESP: Unexpected msgin identify\n"); + return 0; + } + + switch (msg0) { + case EXTENDED_MESSAGE: + if (len == 1) + return 1; + if (len < esp->msg_in[1] + 2) + return 1; + esp_msgin_extended(esp); + return 0; + + case IGNORE_WIDE_RESIDUE: { + struct esp_cmd_entry *ent; + struct esp_cmd_priv *spriv; + if (len == 1) + return 1; + + if (esp->msg_in[1] != 1) + goto do_reject; + + ent = esp->active_cmd; + spriv = ESP_CMD_PRIV(ent->cmd); + + if (spriv->cur_residue == sg_dma_len(spriv->cur_sg)) { + spriv->cur_sg--; + spriv->cur_residue = 1; + } else + spriv->cur_residue++; + spriv->tot_residue++; + return 0; + } + case NOP: + return 0; + case RESTORE_POINTERS: + esp_restore_pointers(esp, esp->active_cmd); + return 0; + case SAVE_POINTERS: + esp_save_pointers(esp, esp->active_cmd); + return 0; + + case COMMAND_COMPLETE: + case DISCONNECT: { + struct esp_cmd_entry *ent = esp->active_cmd; + + ent->message = msg0; + esp_event(esp, ESP_EVENT_FREE_BUS); + esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; + return 0; + } + case MESSAGE_REJECT: + esp_msgin_reject(esp); + return 0; + + default: + do_reject: + esp->msg_out[0] = MESSAGE_REJECT; + esp->msg_out_len = 1; + scsi_esp_cmd(esp, ESP_CMD_SATN); + return 0; + } +} + +static int esp_process_event(struct esp *esp) +{ + int write; + +again: + write = 0; + switch (esp->event) { + case ESP_EVENT_CHECK_PHASE: + switch (esp->sreg & ESP_STAT_PMASK) { + case ESP_DOP: + esp_event(esp, ESP_EVENT_DATA_OUT); + break; + case ESP_DIP: + esp_event(esp, ESP_EVENT_DATA_IN); + break; + case ESP_STATP: + esp_flush_fifo(esp); + scsi_esp_cmd(esp, ESP_CMD_ICCSEQ); + esp_event(esp, ESP_EVENT_STATUS); + esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; + return 1; + + case ESP_MOP: + esp_event(esp, ESP_EVENT_MSGOUT); + break; + + case ESP_MIP: + esp_event(esp, ESP_EVENT_MSGIN); + break; + + case ESP_CMDP: + esp_event(esp, ESP_EVENT_CMD_START); + break; + + default: + printk("ESP: Unexpected phase, sreg=%02x\n", + esp->sreg); + esp_schedule_reset(esp); + return 0; + } + goto again; + break; + + case ESP_EVENT_DATA_IN: + write = 1; + /* fallthru */ + + case ESP_EVENT_DATA_OUT: { + struct esp_cmd_entry *ent = esp->active_cmd; + struct scsi_cmnd *cmd = ent->cmd; + dma_addr_t dma_addr = esp_cur_dma_addr(ent, cmd); + unsigned int dma_len = esp_cur_dma_len(ent, cmd); + + if (esp->rev == ESP100) + scsi_esp_cmd(esp, ESP_CMD_NULL); + + if (write) + ent->flags |= ESP_CMD_FLAG_WRITE; + else + ent->flags &= ~ESP_CMD_FLAG_WRITE; + + dma_len = esp_dma_length_limit(esp, dma_addr, dma_len); + esp->data_dma_len = dma_len; + + if (!dma_len) { + printk(KERN_ERR PFX "esp%d: DMA length is zero!\n", + esp->host->unique_id); + printk(KERN_ERR PFX "esp%d: cur adr[%08llx] len[%08x]\n", + esp->host->unique_id, + (unsigned long long)esp_cur_dma_addr(ent, cmd), + esp_cur_dma_len(ent, cmd)); + esp_schedule_reset(esp); + return 0; + } + + esp_log_datastart("ESP: start data addr[%08llx] len[%u] " + "write(%d)\n", + (unsigned long long)dma_addr, dma_len, write); + + esp->ops->send_dma_cmd(esp, dma_addr, dma_len, dma_len, + write, ESP_CMD_DMA | ESP_CMD_TI); + esp_event(esp, ESP_EVENT_DATA_DONE); + break; + } + case ESP_EVENT_DATA_DONE: { + struct esp_cmd_entry *ent = esp->active_cmd; + struct scsi_cmnd *cmd = ent->cmd; + int bytes_sent; + + if (esp->ops->dma_error(esp)) { + printk("ESP: data done, DMA error, resetting\n"); + esp_schedule_reset(esp); + return 0; + } + + if (ent->flags & ESP_CMD_FLAG_WRITE) { + /* XXX parity errors, etc. XXX */ + + esp->ops->dma_drain(esp); + } + esp->ops->dma_invalidate(esp); + + if (esp->ireg != ESP_INTR_BSERV) { + /* We should always see exactly a bus-service + * interrupt at the end of a successful transfer. + */ + printk("ESP: data done, not BSERV, resetting\n"); + esp_schedule_reset(esp); + return 0; + } + + bytes_sent = esp_data_bytes_sent(esp, ent, cmd); + + esp_log_datadone("ESP: data done flgs[%x] sent[%d]\n", + ent->flags, bytes_sent); + + if (bytes_sent < 0) { + /* XXX force sync mode for this target XXX */ + esp_schedule_reset(esp); + return 0; + } + + esp_advance_dma(esp, ent, cmd, bytes_sent); + esp_event(esp, ESP_EVENT_CHECK_PHASE); + goto again; + break; + } + + case ESP_EVENT_STATUS: { + struct esp_cmd_entry *ent = esp->active_cmd; + + if (esp->ireg & ESP_INTR_FDONE) { + ent->status = esp_read8(ESP_FDATA); + ent->message = esp_read8(ESP_FDATA); + scsi_esp_cmd(esp, ESP_CMD_MOK); + } else if (esp->ireg == ESP_INTR_BSERV) { + ent->status = esp_read8(ESP_FDATA); + ent->message = 0xff; + esp_event(esp, ESP_EVENT_MSGIN); + return 0; + } + + if (ent->message != COMMAND_COMPLETE) { + printk("ESP: Unexpected message %x in status\n", + ent->message); + esp_schedule_reset(esp); + return 0; + } + + esp_event(esp, ESP_EVENT_FREE_BUS); + esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; + break; + } + case ESP_EVENT_FREE_BUS: { + struct esp_cmd_entry *ent = esp->active_cmd; + struct scsi_cmnd *cmd = ent->cmd; + + if (ent->message == COMMAND_COMPLETE || + ent->message == DISCONNECT) + scsi_esp_cmd(esp, ESP_CMD_ESEL); + + if (ent->message == COMMAND_COMPLETE) { + esp_log_cmddone("ESP: Command done status[%x] " + "message[%x]\n", + ent->status, ent->message); + if (ent->status == SAM_STAT_TASK_SET_FULL) + esp_event_queue_full(esp, ent); + + if (ent->status == SAM_STAT_CHECK_CONDITION && + !(ent->flags & ESP_CMD_FLAG_AUTOSENSE)) { + ent->flags |= ESP_CMD_FLAG_AUTOSENSE; + esp_autosense(esp, ent); + } else { + esp_cmd_is_done(esp, ent, cmd, + compose_result(ent->status, + ent->message, + DID_OK)); + } + } else if (ent->message == DISCONNECT) { + esp_log_disconnect("ESP: Disconnecting tgt[%d] " + "tag[%x:%x]\n", + cmd->device->id, + ent->tag[0], ent->tag[1]); + + esp->active_cmd = NULL; + esp_maybe_execute_command(esp); + } else { + printk("ESP: Unexpected message %x in freebus\n", + ent->message); + esp_schedule_reset(esp); + return 0; + } + if (esp->active_cmd) + esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; + break; + } + case ESP_EVENT_MSGOUT: { + scsi_esp_cmd(esp, ESP_CMD_FLUSH); + + if (esp_debug & ESP_DEBUG_MSGOUT) { + int i; + printk("ESP: Sending message [ "); + for (i = 0; i < esp->msg_out_len; i++) + printk("%02x ", esp->msg_out[i]); + printk("]\n"); + } + + if (esp->rev == FASHME) { + int i; + + /* Always use the fifo. */ + for (i = 0; i < esp->msg_out_len; i++) { + esp_write8(esp->msg_out[i], ESP_FDATA); + esp_write8(0, ESP_FDATA); + } + scsi_esp_cmd(esp, ESP_CMD_TI); + } else { + if (esp->msg_out_len == 1) { + esp_write8(esp->msg_out[0], ESP_FDATA); + scsi_esp_cmd(esp, ESP_CMD_TI); + } else { + /* Use DMA. */ + memcpy(esp->command_block, + esp->msg_out, + esp->msg_out_len); + + esp->ops->send_dma_cmd(esp, + esp->command_block_dma, + esp->msg_out_len, + esp->msg_out_len, + 0, + ESP_CMD_DMA|ESP_CMD_TI); + } + } + esp_event(esp, ESP_EVENT_MSGOUT_DONE); + break; + } + case ESP_EVENT_MSGOUT_DONE: + if (esp->rev == FASHME) { + scsi_esp_cmd(esp, ESP_CMD_FLUSH); + } else { + if (esp->msg_out_len > 1) + esp->ops->dma_invalidate(esp); + } + + if (!(esp->ireg & ESP_INTR_DC)) { + if (esp->rev != FASHME) + scsi_esp_cmd(esp, ESP_CMD_NULL); + } + esp_event(esp, ESP_EVENT_CHECK_PHASE); + goto again; + case ESP_EVENT_MSGIN: + if (esp->ireg & ESP_INTR_BSERV) { + if (esp->rev == FASHME) { + if (!(esp_read8(ESP_STATUS2) & + ESP_STAT2_FEMPTY)) + scsi_esp_cmd(esp, ESP_CMD_FLUSH); + } else { + scsi_esp_cmd(esp, ESP_CMD_FLUSH); + if (esp->rev == ESP100) + scsi_esp_cmd(esp, ESP_CMD_NULL); + } + scsi_esp_cmd(esp, ESP_CMD_TI); + esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; + return 1; + } + if (esp->ireg & ESP_INTR_FDONE) { + u8 val; + + if (esp->rev == FASHME) + val = esp->fifo[0]; + else + val = esp_read8(ESP_FDATA); + esp->msg_in[esp->msg_in_len++] = val; + + esp_log_msgin("ESP: Got msgin byte %x\n", val); + + if (!esp_msgin_process(esp)) + esp->msg_in_len = 0; + + if (esp->rev == FASHME) + scsi_esp_cmd(esp, ESP_CMD_FLUSH); + + scsi_esp_cmd(esp, ESP_CMD_MOK); + + if (esp->event != ESP_EVENT_FREE_BUS) + esp_event(esp, ESP_EVENT_CHECK_PHASE); + } else { + printk("ESP: MSGIN neither BSERV not FDON, resetting"); + esp_schedule_reset(esp); + return 0; + } + break; + case ESP_EVENT_CMD_START: + memcpy(esp->command_block, esp->cmd_bytes_ptr, + esp->cmd_bytes_left); + if (esp->rev == FASHME) + scsi_esp_cmd(esp, ESP_CMD_FLUSH); + esp->ops->send_dma_cmd(esp, esp->command_block_dma, + esp->cmd_bytes_left, 16, 0, + ESP_CMD_DMA | ESP_CMD_TI); + esp_event(esp, ESP_EVENT_CMD_DONE); + esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; + break; + case ESP_EVENT_CMD_DONE: + esp->ops->dma_invalidate(esp); + if (esp->ireg & ESP_INTR_BSERV) { + esp_event(esp, ESP_EVENT_CHECK_PHASE); + goto again; + } + esp_schedule_reset(esp); + return 0; + break; + + case ESP_EVENT_RESET: + scsi_esp_cmd(esp, ESP_CMD_RS); + break; + + default: + printk("ESP: Unexpected event %x, resetting\n", + esp->event); + esp_schedule_reset(esp); + return 0; + break; + } + return 1; +} + +static void esp_reset_cleanup_one(struct esp *esp, struct esp_cmd_entry *ent) +{ + struct scsi_cmnd *cmd = ent->cmd; + + esp_unmap_dma(esp, cmd); + esp_free_lun_tag(ent, cmd->device->hostdata); + cmd->result = DID_RESET << 16; + + if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { + esp->ops->unmap_single(esp, ent->sense_dma, + SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); + ent->sense_ptr = NULL; + } + + cmd->scsi_done(cmd); + list_del(&ent->list); + esp_put_ent(esp, ent); +} + +static void esp_clear_hold(struct scsi_device *dev, void *data) +{ + struct esp_lun_data *lp = dev->hostdata; + + BUG_ON(lp->num_tagged); + lp->hold = 0; +} + +static void esp_reset_cleanup(struct esp *esp) +{ + struct esp_cmd_entry *ent, *tmp; + int i; + + list_for_each_entry_safe(ent, tmp, &esp->queued_cmds, list) { + struct scsi_cmnd *cmd = ent->cmd; + + list_del(&ent->list); + cmd->result = DID_RESET << 16; + cmd->scsi_done(cmd); + esp_put_ent(esp, ent); + } + + list_for_each_entry_safe(ent, tmp, &esp->active_cmds, list) { + if (ent == esp->active_cmd) + esp->active_cmd = NULL; + esp_reset_cleanup_one(esp, ent); + } + + BUG_ON(esp->active_cmd != NULL); + + /* Force renegotiation of sync/wide transfers. */ + for (i = 0; i < ESP_MAX_TARGET; i++) { + struct esp_target_data *tp = &esp->target[i]; + + tp->esp_period = 0; + tp->esp_offset = 0; + tp->esp_config3 &= ~(ESP_CONFIG3_EWIDE | + ESP_CONFIG3_FSCSI | + ESP_CONFIG3_FAST); + tp->flags &= ~ESP_TGT_WIDE; + tp->flags |= ESP_TGT_CHECK_NEGO; + + if (tp->starget) + starget_for_each_device(tp->starget, NULL, + esp_clear_hold); + } +} + +/* Runs under host->lock */ +static void __esp_interrupt(struct esp *esp) +{ + int finish_reset, intr_done; + u8 phase; + + esp->sreg = esp_read8(ESP_STATUS); + + if (esp->flags & ESP_FLAG_RESETTING) { + finish_reset = 1; + } else { + if (esp_check_gross_error(esp)) + return; + + finish_reset = esp_check_spur_intr(esp); + if (finish_reset < 0) + return; + } + + esp->ireg = esp_read8(ESP_INTRPT); + + if (esp->ireg & ESP_INTR_SR) + finish_reset = 1; + + if (finish_reset) { + esp_reset_cleanup(esp); + if (esp->eh_reset) { + complete(esp->eh_reset); + esp->eh_reset = NULL; + } + return; + } + + phase = (esp->sreg & ESP_STAT_PMASK); + if (esp->rev == FASHME) { + if (((phase != ESP_DIP && phase != ESP_DOP) && + esp->select_state == ESP_SELECT_NONE && + esp->event != ESP_EVENT_STATUS && + esp->event != ESP_EVENT_DATA_DONE) || + (esp->ireg & ESP_INTR_RSEL)) { + esp->sreg2 = esp_read8(ESP_STATUS2); + if (!(esp->sreg2 & ESP_STAT2_FEMPTY) || + (esp->sreg2 & ESP_STAT2_F1BYTE)) + hme_read_fifo(esp); + } + } + + esp_log_intr("ESP: intr sreg[%02x] seqreg[%02x] " + "sreg2[%02x] ireg[%02x]\n", + esp->sreg, esp->seqreg, esp->sreg2, esp->ireg); + + intr_done = 0; + + if (esp->ireg & (ESP_INTR_S | ESP_INTR_SATN | ESP_INTR_IC)) { + printk("ESP: unexpected IREG %02x\n", esp->ireg); + if (esp->ireg & ESP_INTR_IC) + esp_dump_cmd_log(esp); + + esp_schedule_reset(esp); + } else { + if (!(esp->ireg & ESP_INTR_RSEL)) { + /* Some combination of FDONE, BSERV, DC. */ + if (esp->select_state != ESP_SELECT_NONE) + intr_done = esp_finish_select(esp); + } else if (esp->ireg & ESP_INTR_RSEL) { + if (esp->active_cmd) + (void) esp_finish_select(esp); + intr_done = esp_reconnect(esp); + } + } + while (!intr_done) + intr_done = esp_process_event(esp); +} + +irqreturn_t scsi_esp_intr(int irq, void *dev_id) +{ + struct esp *esp = dev_id; + unsigned long flags; + irqreturn_t ret; + + spin_lock_irqsave(esp->host->host_lock, flags); + ret = IRQ_NONE; + if (esp->ops->irq_pending(esp)) { + ret = IRQ_HANDLED; + for (;;) { + int i; + + __esp_interrupt(esp); + if (!(esp->flags & ESP_FLAG_QUICKIRQ_CHECK)) + break; + esp->flags &= ~ESP_FLAG_QUICKIRQ_CHECK; + + for (i = 0; i < ESP_QUICKIRQ_LIMIT; i++) { + if (esp->ops->irq_pending(esp)) + break; + } + if (i == ESP_QUICKIRQ_LIMIT) + break; + } + } + spin_unlock_irqrestore(esp->host->host_lock, flags); + + return ret; +} +EXPORT_SYMBOL(scsi_esp_intr); + +static void __devinit esp_get_revision(struct esp *esp) +{ + u8 val; + + esp->config1 = (ESP_CONFIG1_PENABLE | (esp->scsi_id & 7)); + esp->config2 = (ESP_CONFIG2_SCSI2ENAB | ESP_CONFIG2_REGPARITY); + esp_write8(esp->config2, ESP_CFG2); + + val = esp_read8(ESP_CFG2); + val &= ~ESP_CONFIG2_MAGIC; + if (val != (ESP_CONFIG2_SCSI2ENAB | ESP_CONFIG2_REGPARITY)) { + /* If what we write to cfg2 does not come back, cfg2 is not + * implemented, therefore this must be a plain esp100. + */ + esp->rev = ESP100; + } else { + esp->config2 = 0; + esp_set_all_config3(esp, 5); + esp->prev_cfg3 = 5; + esp_write8(esp->config2, ESP_CFG2); + esp_write8(0, ESP_CFG3); + esp_write8(esp->prev_cfg3, ESP_CFG3); + + val = esp_read8(ESP_CFG3); + if (val != 5) { + /* The cfg2 register is implemented, however + * cfg3 is not, must be esp100a. + */ + esp->rev = ESP100A; + } else { + esp_set_all_config3(esp, 0); + esp->prev_cfg3 = 0; + esp_write8(esp->prev_cfg3, ESP_CFG3); + + /* All of cfg{1,2,3} implemented, must be one of + * the fas variants, figure out which one. + */ + if (esp->cfact == 0 || esp->cfact > ESP_CCF_F5) { + esp->rev = FAST; + esp->sync_defp = SYNC_DEFP_FAST; + } else { + esp->rev = ESP236; + } + esp->config2 = 0; + esp_write8(esp->config2, ESP_CFG2); + } + } +} + +static void __devinit esp_init_swstate(struct esp *esp) +{ + int i; + + INIT_LIST_HEAD(&esp->queued_cmds); + INIT_LIST_HEAD(&esp->active_cmds); + INIT_LIST_HEAD(&esp->esp_cmd_pool); + + /* Start with a clear state, domain validation (via ->slave_configure, + * spi_dv_device()) will attempt to enable SYNC, WIDE, and tagged + * commands. + */ + for (i = 0 ; i < ESP_MAX_TARGET; i++) { + esp->target[i].flags = 0; + esp->target[i].nego_goal_period = 0; + esp->target[i].nego_goal_offset = 0; + esp->target[i].nego_goal_width = 0; + esp->target[i].nego_goal_tags = 0; + } +} + +/* This places the ESP into a known state at boot time. */ +static void __devinit esp_bootup_reset(struct esp *esp) +{ + u8 val; + + /* Reset the DMA */ + esp->ops->reset_dma(esp); + + /* Reset the ESP */ + esp_reset_esp(esp); + + /* Reset the SCSI bus, but tell ESP not to generate an irq */ + val = esp_read8(ESP_CFG1); + val |= ESP_CONFIG1_SRRDISAB; + esp_write8(val, ESP_CFG1); + + scsi_esp_cmd(esp, ESP_CMD_RS); + udelay(400); + + esp_write8(esp->config1, ESP_CFG1); + + /* Eat any bitrot in the chip and we are done... */ + esp_read8(ESP_INTRPT); +} + +static void __devinit esp_set_clock_params(struct esp *esp) +{ + int fmhz; + u8 ccf; + + /* This is getting messy but it has to be done correctly or else + * you get weird behavior all over the place. We are trying to + * basically figure out three pieces of information. + * + * a) Clock Conversion Factor + * + * This is a representation of the input crystal clock frequency + * going into the ESP on this machine. Any operation whose timing + * is longer than 400ns depends on this value being correct. For + * example, you'll get blips for arbitration/selection during high + * load or with multiple targets if this is not set correctly. + * + * b) Selection Time-Out + * + * The ESP isn't very bright and will arbitrate for the bus and try + * to select a target forever if you let it. This value tells the + * ESP when it has taken too long to negotiate and that it should + * interrupt the CPU so we can see what happened. The value is + * computed as follows (from NCR/Symbios chip docs). + * + * (Time Out Period) * (Input Clock) + * STO = ---------------------------------- + * (8192) * (Clock Conversion Factor) + * + * We use a time out period of 250ms (ESP_BUS_TIMEOUT). + * + * c) Imperical constants for synchronous offset and transfer period + * register values + * + * This entails the smallest and largest sync period we could ever + * handle on this ESP. + */ + fmhz = esp->cfreq; + + ccf = ((fmhz / 1000000) + 4) / 5; + if (ccf == 1) + ccf = 2; + + /* If we can't find anything reasonable, just assume 20MHZ. + * This is the clock frequency of the older sun4c's where I've + * been unable to find the clock-frequency PROM property. All + * other machines provide useful values it seems. + */ + if (fmhz <= 5000000 || ccf < 1 || ccf > 8) { + fmhz = 20000000; + ccf = 4; + } + + esp->cfact = (ccf == 8 ? 0 : ccf); + esp->cfreq = fmhz; + esp->ccycle = ESP_MHZ_TO_CYCLE(fmhz); + esp->ctick = ESP_TICK(ccf, esp->ccycle); + esp->neg_defp = ESP_NEG_DEFP(fmhz, ccf); + esp->sync_defp = SYNC_DEFP_SLOW; +} + +static const char *esp_chip_names[] = { + "ESP100", + "ESP100A", + "ESP236", + "FAS236", + "FAS100A", + "FAST", + "FASHME", +}; + +static struct scsi_transport_template *esp_transport_template; + +int __devinit scsi_esp_register(struct esp *esp, struct device *dev) +{ + static int instance; + int err; + + esp->host->transportt = esp_transport_template; + esp->host->max_lun = ESP_MAX_LUN; + esp->host->cmd_per_lun = 2; + + esp_set_clock_params(esp); + + esp_get_revision(esp); + + esp_init_swstate(esp); + + esp_bootup_reset(esp); + + printk(KERN_INFO PFX "esp%u, regs[%1p:%1p] irq[%u]\n", + esp->host->unique_id, esp->regs, esp->dma_regs, + esp->host->irq); + printk(KERN_INFO PFX "esp%u is a %s, %u MHz (ccf=%u), SCSI ID %u\n", + esp->host->unique_id, esp_chip_names[esp->rev], + esp->cfreq / 1000000, esp->cfact, esp->scsi_id); + + /* Let the SCSI bus reset settle. */ + ssleep(esp_bus_reset_settle); + + err = scsi_add_host(esp->host, dev); + if (err) + return err; + + esp->host->unique_id = instance++; + + scsi_scan_host(esp->host); + + return 0; +} +EXPORT_SYMBOL(scsi_esp_register); + +void __devexit scsi_esp_unregister(struct esp *esp) +{ + scsi_remove_host(esp->host); +} +EXPORT_SYMBOL(scsi_esp_unregister); + +static int esp_slave_alloc(struct scsi_device *dev) +{ + struct esp *esp = host_to_esp(dev->host); + struct esp_target_data *tp = &esp->target[dev->id]; + struct esp_lun_data *lp; + + lp = kzalloc(sizeof(*lp), GFP_KERNEL); + if (!lp) + return -ENOMEM; + dev->hostdata = lp; + + tp->starget = dev->sdev_target; + + spi_min_period(tp->starget) = esp->min_period; + spi_max_offset(tp->starget) = 15; + + if (esp->flags & ESP_FLAG_WIDE_CAPABLE) + spi_max_width(tp->starget) = 1; + else + spi_max_width(tp->starget) = 0; + + return 0; +} + +static int esp_slave_configure(struct scsi_device *dev) +{ + struct esp *esp = host_to_esp(dev->host); + struct esp_target_data *tp = &esp->target[dev->id]; + int goal_tags, queue_depth; + + goal_tags = 0; + + if (dev->tagged_supported) { + /* XXX make this configurable somehow XXX */ + goal_tags = ESP_DEFAULT_TAGS; + + if (goal_tags > ESP_MAX_TAG) + goal_tags = ESP_MAX_TAG; + } + + queue_depth = goal_tags; + if (queue_depth < dev->host->cmd_per_lun) + queue_depth = dev->host->cmd_per_lun; + + if (goal_tags) { + scsi_set_tag_type(dev, MSG_ORDERED_TAG); + scsi_activate_tcq(dev, queue_depth); + } else { + scsi_deactivate_tcq(dev, queue_depth); + } + tp->flags |= ESP_TGT_DISCONNECT; + + if (!spi_initial_dv(dev->sdev_target)) + spi_dv_device(dev); + + return 0; +} + +static void esp_slave_destroy(struct scsi_device *dev) +{ + struct esp_lun_data *lp = dev->hostdata; + + kfree(lp); + dev->hostdata = NULL; +} + +static int esp_eh_abort_handler(struct scsi_cmnd *cmd) +{ + struct esp *esp = host_to_esp(cmd->device->host); + struct esp_cmd_entry *ent, *tmp; + struct completion eh_done; + unsigned long flags; + + /* XXX This helps a lot with debugging but might be a bit + * XXX much for the final driver. + */ + spin_lock_irqsave(esp->host->host_lock, flags); + printk(KERN_ERR PFX "esp%d: Aborting command [%p:%02x]\n", + esp->host->unique_id, cmd, cmd->cmnd[0]); + ent = esp->active_cmd; + if (ent) + printk(KERN_ERR PFX "esp%d: Current command [%p:%02x]\n", + esp->host->unique_id, ent->cmd, ent->cmd->cmnd[0]); + list_for_each_entry(ent, &esp->queued_cmds, list) { + printk(KERN_ERR PFX "esp%d: Queued command [%p:%02x]\n", + esp->host->unique_id, ent->cmd, ent->cmd->cmnd[0]); + } + list_for_each_entry(ent, &esp->active_cmds, list) { + printk(KERN_ERR PFX "esp%d: Active command [%p:%02x]\n", + esp->host->unique_id, ent->cmd, ent->cmd->cmnd[0]); + } + esp_dump_cmd_log(esp); + spin_unlock_irqrestore(esp->host->host_lock, flags); + + spin_lock_irqsave(esp->host->host_lock, flags); + + ent = NULL; + list_for_each_entry(tmp, &esp->queued_cmds, list) { + if (tmp->cmd == cmd) { + ent = tmp; + break; + } + } + + if (ent) { + /* Easiest case, we didn't even issue the command + * yet so it is trivial to abort. + */ + list_del(&ent->list); + + cmd->result = DID_ABORT << 16; + cmd->scsi_done(cmd); + + esp_put_ent(esp, ent); + + goto out_success; + } + + init_completion(&eh_done); + + ent = esp->active_cmd; + if (ent && ent->cmd == cmd) { + /* Command is the currently active command on + * the bus. If we already have an output message + * pending, no dice. + */ + if (esp->msg_out_len) + goto out_failure; + + /* Send out an abort, encouraging the target to + * go to MSGOUT phase by asserting ATN. + */ + esp->msg_out[0] = ABORT_TASK_SET; + esp->msg_out_len = 1; + ent->eh_done = &eh_done; + + scsi_esp_cmd(esp, ESP_CMD_SATN); + } else { + /* The command is disconnected. This is not easy to + * abort. For now we fail and let the scsi error + * handling layer go try a scsi bus reset or host + * reset. + * + * What we could do is put together a scsi command + * solely for the purpose of sending an abort message + * to the target. Coming up with all the code to + * cook up scsi commands, special case them everywhere, + * etc. is for questionable gain and it would be better + * if the generic scsi error handling layer could do at + * least some of that for us. + * + * Anyways this is an area for potential future improvement + * in this driver. + */ + goto out_failure; + } + + spin_unlock_irqrestore(esp->host->host_lock, flags); + + if (!wait_for_completion_timeout(&eh_done, 5 * HZ)) { + spin_lock_irqsave(esp->host->host_lock, flags); + ent->eh_done = NULL; + spin_unlock_irqrestore(esp->host->host_lock, flags); + + return FAILED; + } + + return SUCCESS; + +out_success: + spin_unlock_irqrestore(esp->host->host_lock, flags); + return SUCCESS; + +out_failure: + /* XXX This might be a good location to set ESP_TGT_BROKEN + * XXX since we know which target/lun in particular is + * XXX causing trouble. + */ + spin_unlock_irqrestore(esp->host->host_lock, flags); + return FAILED; +} + +static int esp_eh_bus_reset_handler(struct scsi_cmnd *cmd) +{ + struct esp *esp = host_to_esp(cmd->device->host); + struct completion eh_reset; + unsigned long flags; + + init_completion(&eh_reset); + + spin_lock_irqsave(esp->host->host_lock, flags); + + esp->eh_reset = &eh_reset; + + /* XXX This is too simple... We should add lots of + * XXX checks here so that if we find that the chip is + * XXX very wedged we return failure immediately so + * XXX that we can perform a full chip reset. + */ + esp->flags |= ESP_FLAG_RESETTING; + scsi_esp_cmd(esp, ESP_CMD_RS); + + spin_unlock_irqrestore(esp->host->host_lock, flags); + + ssleep(esp_bus_reset_settle); + + if (!wait_for_completion_timeout(&eh_reset, 5 * HZ)) { + spin_lock_irqsave(esp->host->host_lock, flags); + esp->eh_reset = NULL; + spin_unlock_irqrestore(esp->host->host_lock, flags); + + return FAILED; + } + + return SUCCESS; +} + +/* All bets are off, reset the entire device. */ +static int esp_eh_host_reset_handler(struct scsi_cmnd *cmd) +{ + struct esp *esp = host_to_esp(cmd->device->host); + unsigned long flags; + + spin_lock_irqsave(esp->host->host_lock, flags); + esp_bootup_reset(esp); + esp_reset_cleanup(esp); + spin_unlock_irqrestore(esp->host->host_lock, flags); + + ssleep(esp_bus_reset_settle); + + return SUCCESS; +} + +static const char *esp_info(struct Scsi_Host *host) +{ + return "esp"; +} + +struct scsi_host_template scsi_esp_template = { + .module = THIS_MODULE, + .name = "esp", + .info = esp_info, + .queuecommand = esp_queuecommand, + .slave_alloc = esp_slave_alloc, + .slave_configure = esp_slave_configure, + .slave_destroy = esp_slave_destroy, + .eh_abort_handler = esp_eh_abort_handler, + .eh_bus_reset_handler = esp_eh_bus_reset_handler, + .eh_host_reset_handler = esp_eh_host_reset_handler, + .can_queue = 7, + .this_id = 7, + .sg_tablesize = SG_ALL, + .use_clustering = ENABLE_CLUSTERING, + .max_sectors = 0xffff, + .skip_settle_delay = 1, +}; +EXPORT_SYMBOL(scsi_esp_template); + +static void esp_get_signalling(struct Scsi_Host *host) +{ + struct esp *esp = host_to_esp(host); + enum spi_signal_type type; + + if (esp->flags & ESP_FLAG_DIFFERENTIAL) + type = SPI_SIGNAL_HVD; + else + type = SPI_SIGNAL_SE; + + spi_signalling(host) = type; +} + +static void esp_set_offset(struct scsi_target *target, int offset) +{ + struct Scsi_Host *host = dev_to_shost(target->dev.parent); + struct esp *esp = host_to_esp(host); + struct esp_target_data *tp = &esp->target[target->id]; + + tp->nego_goal_offset = offset; + tp->flags |= ESP_TGT_CHECK_NEGO; +} + +static void esp_set_period(struct scsi_target *target, int period) +{ + struct Scsi_Host *host = dev_to_shost(target->dev.parent); + struct esp *esp = host_to_esp(host); + struct esp_target_data *tp = &esp->target[target->id]; + + tp->nego_goal_period = period; + tp->flags |= ESP_TGT_CHECK_NEGO; +} + +static void esp_set_width(struct scsi_target *target, int width) +{ + struct Scsi_Host *host = dev_to_shost(target->dev.parent); + struct esp *esp = host_to_esp(host); + struct esp_target_data *tp = &esp->target[target->id]; + + tp->nego_goal_width = (width ? 1 : 0); + tp->flags |= ESP_TGT_CHECK_NEGO; +} + +static struct spi_function_template esp_transport_ops = { + .set_offset = esp_set_offset, + .show_offset = 1, + .set_period = esp_set_period, + .show_period = 1, + .set_width = esp_set_width, + .show_width = 1, + .get_signalling = esp_get_signalling, +}; + +static int __init esp_init(void) +{ + BUILD_BUG_ON(sizeof(struct scsi_pointer) < + sizeof(struct esp_cmd_priv)); + + esp_transport_template = spi_attach_transport(&esp_transport_ops); + if (!esp_transport_template) + return -ENODEV; + + return 0; +} + +static void __exit esp_exit(void) +{ + spi_release_transport(esp_transport_template); +} + +MODULE_DESCRIPTION("ESP SCSI driver core"); +MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); + +module_param(esp_bus_reset_settle, int, 0); +MODULE_PARM_DESC(esp_bus_reset_settle, + "ESP scsi bus reset delay in seconds"); + +module_param(esp_debug, int, 0); +MODULE_PARM_DESC(esp_debug, +"ESP bitmapped debugging message enable value:\n" +" 0x00000001 Log interrupt events\n" +" 0x00000002 Log scsi commands\n" +" 0x00000004 Log resets\n" +" 0x00000008 Log message in events\n" +" 0x00000010 Log message out events\n" +" 0x00000020 Log command completion\n" +" 0x00000040 Log disconnects\n" +" 0x00000080 Log data start\n" +" 0x00000100 Log data done\n" +" 0x00000200 Log reconnects\n" +" 0x00000400 Log auto-sense data\n" +); + +module_init(esp_init); +module_exit(esp_exit); diff --git a/drivers/scsi/esp_scsi.h b/drivers/scsi/esp_scsi.h new file mode 100644 index 00000000000..8d4a6690401 --- /dev/null +++ b/drivers/scsi/esp_scsi.h @@ -0,0 +1,560 @@ +/* esp_scsi.h: Defines and structures for the ESP drier. + * + * Copyright (C) 2007 David S. Miller (davem@davemloft.net) + */ + +#ifndef _ESP_SCSI_H +#define _ESP_SCSI_H + + /* Access Description Offset */ +#define ESP_TCLOW 0x00UL /* rw Low bits transfer count 0x00 */ +#define ESP_TCMED 0x01UL /* rw Mid bits transfer count 0x04 */ +#define ESP_FDATA 0x02UL /* rw FIFO data bits 0x08 */ +#define ESP_CMD 0x03UL /* rw SCSI command bits 0x0c */ +#define ESP_STATUS 0x04UL /* ro ESP status register 0x10 */ +#define ESP_BUSID ESP_STATUS /* wo BusID for sel/resel 0x10 */ +#define ESP_INTRPT 0x05UL /* ro Kind of interrupt 0x14 */ +#define ESP_TIMEO ESP_INTRPT /* wo Timeout for sel/resel 0x14 */ +#define ESP_SSTEP 0x06UL /* ro Sequence step register 0x18 */ +#define ESP_STP ESP_SSTEP /* wo Transfer period/sync 0x18 */ +#define ESP_FFLAGS 0x07UL /* ro Bits current FIFO info 0x1c */ +#define ESP_SOFF ESP_FFLAGS /* wo Sync offset 0x1c */ +#define ESP_CFG1 0x08UL /* rw First cfg register 0x20 */ +#define ESP_CFACT 0x09UL /* wo Clock conv factor 0x24 */ +#define ESP_STATUS2 ESP_CFACT /* ro HME status2 register 0x24 */ +#define ESP_CTEST 0x0aUL /* wo Chip test register 0x28 */ +#define ESP_CFG2 0x0bUL /* rw Second cfg register 0x2c */ +#define ESP_CFG3 0x0cUL /* rw Third cfg register 0x30 */ +#define ESP_TCHI 0x0eUL /* rw High bits transf count 0x38 */ +#define ESP_UID ESP_TCHI /* ro Unique ID code 0x38 */ +#define FAS_RLO ESP_TCHI /* rw HME extended counter 0x38 */ +#define ESP_FGRND 0x0fUL /* rw Data base for fifo 0x3c */ +#define FAS_RHI ESP_FGRND /* rw HME extended counter 0x3c */ + +#define SBUS_ESP_REG_SIZE 0x40UL + +/* Bitfield meanings for the above registers. */ + +/* ESP config reg 1, read-write, found on all ESP chips */ +#define ESP_CONFIG1_ID 0x07 /* My BUS ID bits */ +#define ESP_CONFIG1_CHTEST 0x08 /* Enable ESP chip tests */ +#define ESP_CONFIG1_PENABLE 0x10 /* Enable parity checks */ +#define ESP_CONFIG1_PARTEST 0x20 /* Parity test mode enabled? */ +#define ESP_CONFIG1_SRRDISAB 0x40 /* Disable SCSI reset reports */ +#define ESP_CONFIG1_SLCABLE 0x80 /* Enable slow cable mode */ + +/* ESP config reg 2, read-write, found only on esp100a+esp200+esp236 chips */ +#define ESP_CONFIG2_DMAPARITY 0x01 /* enable DMA Parity (200,236) */ +#define ESP_CONFIG2_REGPARITY 0x02 /* enable reg Parity (200,236) */ +#define ESP_CONFIG2_BADPARITY 0x04 /* Bad parity target abort */ +#define ESP_CONFIG2_SCSI2ENAB 0x08 /* Enable SCSI-2 features (tgtmode) */ +#define ESP_CONFIG2_HI 0x10 /* High Impedance DREQ ??? */ +#define ESP_CONFIG2_HMEFENAB 0x10 /* HME features enable */ +#define ESP_CONFIG2_BCM 0x20 /* Enable byte-ctrl (236) */ +#define ESP_CONFIG2_DISPINT 0x20 /* Disable pause irq (hme) */ +#define ESP_CONFIG2_FENAB 0x40 /* Enable features (fas100,216) */ +#define ESP_CONFIG2_SPL 0x40 /* Enable status-phase latch (236) */ +#define ESP_CONFIG2_MKDONE 0x40 /* HME magic feature */ +#define ESP_CONFIG2_HME32 0x80 /* HME 32 extended */ +#define ESP_CONFIG2_MAGIC 0xe0 /* Invalid bits... */ + +/* ESP config register 3 read-write, found only esp236+fas236+fas100a+hme chips */ +#define ESP_CONFIG3_FCLOCK 0x01 /* FAST SCSI clock rate (esp100a/hme) */ +#define ESP_CONFIG3_TEM 0x01 /* Enable thresh-8 mode (esp/fas236) */ +#define ESP_CONFIG3_FAST 0x02 /* Enable FAST SCSI (esp100a/hme) */ +#define ESP_CONFIG3_ADMA 0x02 /* Enable alternate-dma (esp/fas236) */ +#define ESP_CONFIG3_TENB 0x04 /* group2 SCSI2 support (esp100a/hme) */ +#define ESP_CONFIG3_SRB 0x04 /* Save residual byte (esp/fas236) */ +#define ESP_CONFIG3_TMS 0x08 /* Three-byte msg's ok (esp100a/hme) */ +#define ESP_CONFIG3_FCLK 0x08 /* Fast SCSI clock rate (esp/fas236) */ +#define ESP_CONFIG3_IDMSG 0x10 /* ID message checking (esp100a/hme) */ +#define ESP_CONFIG3_FSCSI 0x10 /* Enable FAST SCSI (esp/fas236) */ +#define ESP_CONFIG3_GTM 0x20 /* group2 SCSI2 support (esp/fas236) */ +#define ESP_CONFIG3_IDBIT3 0x20 /* Bit 3 of HME SCSI-ID (hme) */ +#define ESP_CONFIG3_TBMS 0x40 /* Three-byte msg's ok (esp/fas236) */ +#define ESP_CONFIG3_EWIDE 0x40 /* Enable Wide-SCSI (hme) */ +#define ESP_CONFIG3_IMS 0x80 /* ID msg chk'ng (esp/fas236) */ +#define ESP_CONFIG3_OBPUSH 0x80 /* Push odd-byte to dma (hme) */ + +/* ESP command register read-write */ +/* Group 1 commands: These may be sent at any point in time to the ESP + * chip. None of them can generate interrupts 'cept + * the "SCSI bus reset" command if you have not disabled + * SCSI reset interrupts in the config1 ESP register. + */ +#define ESP_CMD_NULL 0x00 /* Null command, ie. a nop */ +#define ESP_CMD_FLUSH 0x01 /* FIFO Flush */ +#define ESP_CMD_RC 0x02 /* Chip reset */ +#define ESP_CMD_RS 0x03 /* SCSI bus reset */ + +/* Group 2 commands: ESP must be an initiator and connected to a target + * for these commands to work. + */ +#define ESP_CMD_TI 0x10 /* Transfer Information */ +#define ESP_CMD_ICCSEQ 0x11 /* Initiator cmd complete sequence */ +#define ESP_CMD_MOK 0x12 /* Message okie-dokie */ +#define ESP_CMD_TPAD 0x18 /* Transfer Pad */ +#define ESP_CMD_SATN 0x1a /* Set ATN */ +#define ESP_CMD_RATN 0x1b /* De-assert ATN */ + +/* Group 3 commands: ESP must be in the MSGOUT or MSGIN state and be connected + * to a target as the initiator for these commands to work. + */ +#define ESP_CMD_SMSG 0x20 /* Send message */ +#define ESP_CMD_SSTAT 0x21 /* Send status */ +#define ESP_CMD_SDATA 0x22 /* Send data */ +#define ESP_CMD_DSEQ 0x23 /* Discontinue Sequence */ +#define ESP_CMD_TSEQ 0x24 /* Terminate Sequence */ +#define ESP_CMD_TCCSEQ 0x25 /* Target cmd cmplt sequence */ +#define ESP_CMD_DCNCT 0x27 /* Disconnect */ +#define ESP_CMD_RMSG 0x28 /* Receive Message */ +#define ESP_CMD_RCMD 0x29 /* Receive Command */ +#define ESP_CMD_RDATA 0x2a /* Receive Data */ +#define ESP_CMD_RCSEQ 0x2b /* Receive cmd sequence */ + +/* Group 4 commands: The ESP must be in the disconnected state and must + * not be connected to any targets as initiator for + * these commands to work. + */ +#define ESP_CMD_RSEL 0x40 /* Reselect */ +#define ESP_CMD_SEL 0x41 /* Select w/o ATN */ +#define ESP_CMD_SELA 0x42 /* Select w/ATN */ +#define ESP_CMD_SELAS 0x43 /* Select w/ATN & STOP */ +#define ESP_CMD_ESEL 0x44 /* Enable selection */ +#define ESP_CMD_DSEL 0x45 /* Disable selections */ +#define ESP_CMD_SA3 0x46 /* Select w/ATN3 */ +#define ESP_CMD_RSEL3 0x47 /* Reselect3 */ + +/* This bit enables the ESP's DMA on the SBus */ +#define ESP_CMD_DMA 0x80 /* Do DMA? */ + +/* ESP status register read-only */ +#define ESP_STAT_PIO 0x01 /* IO phase bit */ +#define ESP_STAT_PCD 0x02 /* CD phase bit */ +#define ESP_STAT_PMSG 0x04 /* MSG phase bit */ +#define ESP_STAT_PMASK 0x07 /* Mask of phase bits */ +#define ESP_STAT_TDONE 0x08 /* Transfer Completed */ +#define ESP_STAT_TCNT 0x10 /* Transfer Counter Is Zero */ +#define ESP_STAT_PERR 0x20 /* Parity error */ +#define ESP_STAT_SPAM 0x40 /* Real bad error */ +/* This indicates the 'interrupt pending' condition on esp236, it is a reserved + * bit on other revs of the ESP. + */ +#define ESP_STAT_INTR 0x80 /* Interrupt */ + +/* The status register can be masked with ESP_STAT_PMASK and compared + * with the following values to determine the current phase the ESP + * (at least thinks it) is in. For our purposes we also add our own + * software 'done' bit for our phase management engine. + */ +#define ESP_DOP (0) /* Data Out */ +#define ESP_DIP (ESP_STAT_PIO) /* Data In */ +#define ESP_CMDP (ESP_STAT_PCD) /* Command */ +#define ESP_STATP (ESP_STAT_PCD|ESP_STAT_PIO) /* Status */ +#define ESP_MOP (ESP_STAT_PMSG|ESP_STAT_PCD) /* Message Out */ +#define ESP_MIP (ESP_STAT_PMSG|ESP_STAT_PCD|ESP_STAT_PIO) /* Message In */ + +/* HME only: status 2 register */ +#define ESP_STAT2_SCHBIT 0x01 /* Upper bits 3-7 of sstep enabled */ +#define ESP_STAT2_FFLAGS 0x02 /* The fifo flags are now latched */ +#define ESP_STAT2_XCNT 0x04 /* The transfer counter is latched */ +#define ESP_STAT2_CREGA 0x08 /* The command reg is active now */ +#define ESP_STAT2_WIDE 0x10 /* Interface on this adapter is wide */ +#define ESP_STAT2_F1BYTE 0x20 /* There is one byte at top of fifo */ +#define ESP_STAT2_FMSB 0x40 /* Next byte in fifo is most significant */ +#define ESP_STAT2_FEMPTY 0x80 /* FIFO is empty */ + +/* ESP interrupt register read-only */ +#define ESP_INTR_S 0x01 /* Select w/o ATN */ +#define ESP_INTR_SATN 0x02 /* Select w/ATN */ +#define ESP_INTR_RSEL 0x04 /* Reselected */ +#define ESP_INTR_FDONE 0x08 /* Function done */ +#define ESP_INTR_BSERV 0x10 /* Bus service */ +#define ESP_INTR_DC 0x20 /* Disconnect */ +#define ESP_INTR_IC 0x40 /* Illegal command given */ +#define ESP_INTR_SR 0x80 /* SCSI bus reset detected */ + +/* ESP sequence step register read-only */ +#define ESP_STEP_VBITS 0x07 /* Valid bits */ +#define ESP_STEP_ASEL 0x00 /* Selection&Arbitrate cmplt */ +#define ESP_STEP_SID 0x01 /* One msg byte sent */ +#define ESP_STEP_NCMD 0x02 /* Was not in command phase */ +#define ESP_STEP_PPC 0x03 /* Early phase chg caused cmnd + * bytes to be lost + */ +#define ESP_STEP_FINI4 0x04 /* Command was sent ok */ + +/* Ho hum, some ESP's set the step register to this as well... */ +#define ESP_STEP_FINI5 0x05 +#define ESP_STEP_FINI6 0x06 +#define ESP_STEP_FINI7 0x07 + +/* ESP chip-test register read-write */ +#define ESP_TEST_TARG 0x01 /* Target test mode */ +#define ESP_TEST_INI 0x02 /* Initiator test mode */ +#define ESP_TEST_TS 0x04 /* Tristate test mode */ + +/* ESP unique ID register read-only, found on fas236+fas100a only */ +#define ESP_UID_F100A 0x00 /* ESP FAS100A */ +#define ESP_UID_F236 0x02 /* ESP FAS236 */ +#define ESP_UID_REV 0x07 /* ESP revision */ +#define ESP_UID_FAM 0xf8 /* ESP family */ + +/* ESP fifo flags register read-only */ +/* Note that the following implies a 16 byte FIFO on the ESP. */ +#define ESP_FF_FBYTES 0x1f /* Num bytes in FIFO */ +#define ESP_FF_ONOTZERO 0x20 /* offset ctr not zero (esp100) */ +#define ESP_FF_SSTEP 0xe0 /* Sequence step */ + +/* ESP clock conversion factor register write-only */ +#define ESP_CCF_F0 0x00 /* 35.01MHz - 40MHz */ +#define ESP_CCF_NEVER 0x01 /* Set it to this and die */ +#define ESP_CCF_F2 0x02 /* 10MHz */ +#define ESP_CCF_F3 0x03 /* 10.01MHz - 15MHz */ +#define ESP_CCF_F4 0x04 /* 15.01MHz - 20MHz */ +#define ESP_CCF_F5 0x05 /* 20.01MHz - 25MHz */ +#define ESP_CCF_F6 0x06 /* 25.01MHz - 30MHz */ +#define ESP_CCF_F7 0x07 /* 30.01MHz - 35MHz */ + +/* HME only... */ +#define ESP_BUSID_RESELID 0x10 +#define ESP_BUSID_CTR32BIT 0x40 + +#define ESP_BUS_TIMEOUT 250 /* In milli-seconds */ +#define ESP_TIMEO_CONST 8192 +#define ESP_NEG_DEFP(mhz, cfact) \ + ((ESP_BUS_TIMEOUT * ((mhz) / 1000)) / (8192 * (cfact))) +#define ESP_MHZ_TO_CYCLE(mhertz) ((1000000000) / ((mhertz) / 1000)) +#define ESP_TICK(ccf, cycle) ((7682 * (ccf) * (cycle) / 1000)) + +/* For slow to medium speed input clock rates we shoot for 5mb/s, but for high + * input clock rates we try to do 10mb/s although I don't think a transfer can + * even run that fast with an ESP even with DMA2 scatter gather pipelining. + */ +#define SYNC_DEFP_SLOW 0x32 /* 5mb/s */ +#define SYNC_DEFP_FAST 0x19 /* 10mb/s */ + +struct esp_cmd_priv { + union { + dma_addr_t dma_addr; + int num_sg; + } u; + + unsigned int cur_residue; + struct scatterlist *cur_sg; + unsigned int tot_residue; +}; +#define ESP_CMD_PRIV(CMD) ((struct esp_cmd_priv *)(&(CMD)->SCp)) + +enum esp_rev { + ESP100 = 0x00, /* NCR53C90 - very broken */ + ESP100A = 0x01, /* NCR53C90A */ + ESP236 = 0x02, + FAS236 = 0x03, + FAS100A = 0x04, + FAST = 0x05, + FASHME = 0x06, +}; + +struct esp_cmd_entry { + struct list_head list; + + struct scsi_cmnd *cmd; + + unsigned int saved_cur_residue; + struct scatterlist *saved_cur_sg; + unsigned int saved_tot_residue; + + u8 flags; +#define ESP_CMD_FLAG_WRITE 0x01 /* DMA is a write */ +#define ESP_CMD_FLAG_ABORT 0x02 /* being aborted */ +#define ESP_CMD_FLAG_AUTOSENSE 0x04 /* Doing automatic REQUEST_SENSE */ + + u8 tag[2]; + + u8 status; + u8 message; + + unsigned char *sense_ptr; + unsigned char *saved_sense_ptr; + dma_addr_t sense_dma; + + struct completion *eh_done; +}; + +/* XXX make this configurable somehow XXX */ +#define ESP_DEFAULT_TAGS 16 + +#define ESP_MAX_TARGET 16 +#define ESP_MAX_LUN 8 +#define ESP_MAX_TAG 256 + +struct esp_lun_data { + struct esp_cmd_entry *non_tagged_cmd; + int num_tagged; + int hold; + struct esp_cmd_entry *tagged_cmds[ESP_MAX_TAG]; +}; + +struct esp_target_data { + /* These are the ESP_STP, ESP_SOFF, and ESP_CFG3 register values which + * match the currently negotiated settings for this target. The SCSI + * protocol values are maintained in spi_{offset,period,wide}(starget). + */ + u8 esp_period; + u8 esp_offset; + u8 esp_config3; + + u8 flags; +#define ESP_TGT_WIDE 0x01 +#define ESP_TGT_DISCONNECT 0x02 +#define ESP_TGT_NEGO_WIDE 0x04 +#define ESP_TGT_NEGO_SYNC 0x08 +#define ESP_TGT_CHECK_NEGO 0x40 +#define ESP_TGT_BROKEN 0x80 + + /* When ESP_TGT_CHECK_NEGO is set, on the next scsi command to this + * device we will try to negotiate the following parameters. + */ + u8 nego_goal_period; + u8 nego_goal_offset; + u8 nego_goal_width; + u8 nego_goal_tags; + + struct scsi_target *starget; +}; + +struct esp_event_ent { + u8 type; +#define ESP_EVENT_TYPE_EVENT 0x01 +#define ESP_EVENT_TYPE_CMD 0x02 + u8 val; + + u8 sreg; + u8 seqreg; + u8 sreg2; + u8 ireg; + u8 select_state; + u8 event; + u8 __pad; +}; + +struct esp; +struct esp_driver_ops { + /* Read and write the ESP 8-bit registers. On some + * applications of the ESP chip the registers are at 4-byte + * instead of 1-byte intervals. + */ + void (*esp_write8)(struct esp *esp, u8 val, unsigned long reg); + u8 (*esp_read8)(struct esp *esp, unsigned long reg); + + /* Map and unmap DMA memory. Eventually the driver will be + * converted to the generic DMA API as soon as SBUS is able to + * cope with that. At such time we can remove this. + */ + dma_addr_t (*map_single)(struct esp *esp, void *buf, + size_t sz, int dir); + int (*map_sg)(struct esp *esp, struct scatterlist *sg, + int num_sg, int dir); + void (*unmap_single)(struct esp *esp, dma_addr_t addr, + size_t sz, int dir); + void (*unmap_sg)(struct esp *esp, struct scatterlist *sg, + int num_sg, int dir); + + /* Return non-zero if there is an IRQ pending. Usually this + * status bit lives in the DMA controller sitting in front of + * the ESP. This has to be accurate or else the ESP interrupt + * handler will not run. + */ + int (*irq_pending)(struct esp *esp); + + /* Reset the DMA engine entirely. On return, ESP interrupts + * should be enabled. Often the interrupt enabling is + * controlled in the DMA engine. + */ + void (*reset_dma)(struct esp *esp); + + /* Drain any pending DMA in the DMA engine after a transfer. + * This is for writes to memory. + */ + void (*dma_drain)(struct esp *esp); + + /* Invalidate the DMA engine after a DMA transfer. */ + void (*dma_invalidate)(struct esp *esp); + + /* Setup an ESP command that will use a DMA transfer. + * The 'esp_count' specifies what transfer length should be + * programmed into the ESP transfer counter registers, whereas + * the 'dma_count' is the length that should be programmed into + * the DMA controller. Usually they are the same. If 'write' + * is non-zero, this transfer is a write into memory. 'cmd' + * holds the ESP command that should be issued by calling + * scsi_esp_cmd() at the appropriate time while programming + * the DMA hardware. + */ + void (*send_dma_cmd)(struct esp *esp, u32 dma_addr, u32 esp_count, + u32 dma_count, int write, u8 cmd); + + /* Return non-zero if the DMA engine is reporting an error + * currently. + */ + int (*dma_error)(struct esp *esp); +}; + +#define ESP_MAX_MSG_SZ 8 +#define ESP_EVENT_LOG_SZ 32 + +#define ESP_QUICKIRQ_LIMIT 100 +#define ESP_RESELECT_TAG_LIMIT 2500 + +struct esp { + void __iomem *regs; + void __iomem *dma_regs; + + const struct esp_driver_ops *ops; + + struct Scsi_Host *host; + void *dev; + + struct esp_cmd_entry *active_cmd; + + struct list_head queued_cmds; + struct list_head active_cmds; + + u8 *command_block; + dma_addr_t command_block_dma; + + unsigned int data_dma_len; + + /* The following are used to determine the cause of an IRQ. Upon every + * IRQ entry we synchronize these with the hardware registers. + */ + u8 sreg; + u8 seqreg; + u8 sreg2; + u8 ireg; + + u32 prev_hme_dmacsr; + u8 prev_soff; + u8 prev_stp; + u8 prev_cfg3; + u8 __pad; + + struct list_head esp_cmd_pool; + + struct esp_target_data target[ESP_MAX_TARGET]; + + int fifo_cnt; + u8 fifo[16]; + + struct esp_event_ent esp_event_log[ESP_EVENT_LOG_SZ]; + int esp_event_cur; + + u8 msg_out[ESP_MAX_MSG_SZ]; + int msg_out_len; + + u8 msg_in[ESP_MAX_MSG_SZ]; + int msg_in_len; + + u8 bursts; + u8 config1; + u8 config2; + + u8 scsi_id; + u32 scsi_id_mask; + + enum esp_rev rev; + + u32 flags; +#define ESP_FLAG_DIFFERENTIAL 0x00000001 +#define ESP_FLAG_RESETTING 0x00000002 +#define ESP_FLAG_DOING_SLOWCMD 0x00000004 +#define ESP_FLAG_WIDE_CAPABLE 0x00000008 +#define ESP_FLAG_QUICKIRQ_CHECK 0x00000010 + + u8 select_state; +#define ESP_SELECT_NONE 0x00 /* Not selecting */ +#define ESP_SELECT_BASIC 0x01 /* Select w/o MSGOUT phase */ +#define ESP_SELECT_MSGOUT 0x02 /* Select with MSGOUT */ + + /* When we are not selecting, we are expecting an event. */ + u8 event; +#define ESP_EVENT_NONE 0x00 +#define ESP_EVENT_CMD_START 0x01 +#define ESP_EVENT_CMD_DONE 0x02 +#define ESP_EVENT_DATA_IN 0x03 +#define ESP_EVENT_DATA_OUT 0x04 +#define ESP_EVENT_DATA_DONE 0x05 +#define ESP_EVENT_MSGIN 0x06 +#define ESP_EVENT_MSGIN_MORE 0x07 +#define ESP_EVENT_MSGIN_DONE 0x08 +#define ESP_EVENT_MSGOUT 0x09 +#define ESP_EVENT_MSGOUT_DONE 0x0a +#define ESP_EVENT_STATUS 0x0b +#define ESP_EVENT_FREE_BUS 0x0c +#define ESP_EVENT_CHECK_PHASE 0x0d +#define ESP_EVENT_RESET 0x10 + + /* Probed in esp_get_clock_params() */ + u32 cfact; + u32 cfreq; + u32 ccycle; + u32 ctick; + u32 neg_defp; + u32 sync_defp; + + /* Computed in esp_reset_esp() */ + u32 max_period; + u32 min_period; + u32 radelay; + + /* Slow command state. */ + u8 *cmd_bytes_ptr; + int cmd_bytes_left; + + struct completion *eh_reset; + + struct sbus_dma *dma; +}; + +#define host_to_esp(host) ((struct esp *)(host)->hostdata) + +/* A front-end driver for the ESP chip should do the following in + * it's device probe routine: + * 1) Allocate the host and private area using scsi_host_alloc() + * with size 'sizeof(struct esp)'. The first argument to + * scsi_host_alloc() should be &scsi_esp_template. + * 2) Set host->max_id as appropriate. + * 3) Set esp->host to the scsi_host itself, and esp->dev + * to the device object pointer. + * 4) Hook up esp->ops to the front-end implementation. + * 5) If the ESP chip supports wide transfers, set ESP_FLAG_WIDE_CAPABLE + * in esp->flags. + * 6) Map the DMA and ESP chip registers. + * 7) DMA map the ESP command block, store the DMA address + * in esp->command_block_dma. + * 8) Register the scsi_esp_intr() interrupt handler. + * 9) Probe for and provide the following chip properties: + * esp->scsi_id (assign to esp->host->this_id too) + * esp->scsi_id_mask + * If ESP bus is differential, set ESP_FLAG_DIFFERENTIAL + * esp->cfreq + * DMA burst bit mask in esp->bursts, if necessary + * 10) Perform any actions necessary before the ESP device can + * be programmed for the first time. On some configs, for + * example, the DMA engine has to be reset before ESP can + * be programmed. + * 11) If necessary, call dev_set_drvdata() as needed. + * 12) Call scsi_esp_register() with prepared 'esp' structure + * and a device pointer if possible. + * 13) Check scsi_esp_register() return value, release all resources + * if an error was returned. + */ +extern struct scsi_host_template scsi_esp_template; +extern int scsi_esp_register(struct esp *, struct device *); + +extern void scsi_esp_unregister(struct esp *); +extern irqreturn_t scsi_esp_intr(int, void *); +extern void scsi_esp_cmd(struct esp *, u8); + +#endif /* !(_ESP_SCSI_H) */ diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c index 8c81cec8529..60446b88f72 100644 --- a/drivers/scsi/gdth.c +++ b/drivers/scsi/gdth.c @@ -3091,6 +3091,7 @@ static int gdth_fill_raw_cmd(int hanum,Scsi_Cmnd *scp,unchar b) cmdp->u.raw64.direction = gdth_direction_tab[scp->cmnd[0]]==DOU ? GDTH_DATA_OUT:GDTH_DATA_IN; memcpy(cmdp->u.raw64.cmd,scp->cmnd,16); + cmdp->u.raw64.sg_ranz = 0; } else { cmdp->u.raw.reserved = 0; cmdp->u.raw.mdisc_time = 0; @@ -3107,6 +3108,7 @@ static int gdth_fill_raw_cmd(int hanum,Scsi_Cmnd *scp,unchar b) cmdp->u.raw.direction = gdth_direction_tab[scp->cmnd[0]]==DOU ? GDTH_DATA_OUT:GDTH_DATA_IN; memcpy(cmdp->u.raw.cmd,scp->cmnd,12); + cmdp->u.raw.sg_ranz = 0; } if (scp->use_sg) { diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index 38c3a291efa..bd8e7f323c6 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -435,7 +435,7 @@ struct Scsi_Host *scsi_host_lookup(unsigned short hostnum) struct class_device *cdev; struct Scsi_Host *shost = ERR_PTR(-ENXIO), *p; - down_read(&class->subsys.rwsem); + down(&class->sem); list_for_each_entry(cdev, &class->children, node) { p = class_to_shost(cdev); if (p->host_no == hostnum) { @@ -443,7 +443,7 @@ struct Scsi_Host *scsi_host_lookup(unsigned short hostnum) break; } } - up_read(&class->subsys.rwsem); + up(&class->sem); return shost; } diff --git a/drivers/scsi/ibmvscsi/ibmvstgt.c b/drivers/scsi/ibmvscsi/ibmvstgt.c index 4368ca0e827..a39a478bb39 100644 --- a/drivers/scsi/ibmvscsi/ibmvstgt.c +++ b/drivers/scsi/ibmvscsi/ibmvstgt.c @@ -897,9 +897,9 @@ static int get_system_info(void) { struct device_node *rootdn; const char *id, *model, *name; - unsigned int *num; + const unsigned int *num; - rootdn = find_path_device("/"); + rootdn = of_find_node_by_path("/"); if (!rootdn) return -ENOENT; @@ -912,10 +912,11 @@ static int get_system_info(void) if (name) strncpy(partition_name, name, sizeof(partition_name)); - num = (unsigned int *) get_property(rootdn, "ibm,partition-no", NULL); + num = get_property(rootdn, "ibm,partition-no", NULL); if (num) partition_number = *num; + of_node_put(rootdn); return 0; } diff --git a/drivers/scsi/ibmvscsi/rpa_vscsi.c b/drivers/scsi/ibmvscsi/rpa_vscsi.c index 227c0f2f4d7..0a533f398f5 100644 --- a/drivers/scsi/ibmvscsi/rpa_vscsi.c +++ b/drivers/scsi/ibmvscsi/rpa_vscsi.c @@ -157,7 +157,7 @@ static void gather_partition_info(void) const unsigned int *p_number_ptr; /* Retrieve information about this partition */ - rootdn = find_path_device("/"); + rootdn = of_find_node_by_path("/"); if (!rootdn) { return; } @@ -169,6 +169,7 @@ static void gather_partition_info(void) p_number_ptr = get_property(rootdn, "ibm,partition-no", NULL); if (p_number_ptr) partition_number = *p_number_ptr; + of_node_put(rootdn); } static void set_adapter_info(struct ibmvscsi_host_data *hostdata) diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c index 8f6b5bf580f..2b5b8a93bc1 100644 --- a/drivers/scsi/ide-scsi.c +++ b/drivers/scsi/ide-scsi.c @@ -801,15 +801,10 @@ static int idescsi_ide_open(struct inode *inode, struct file *filp) { struct gendisk *disk = inode->i_bdev->bd_disk; struct ide_scsi_obj *scsi; - ide_drive_t *drive; if (!(scsi = ide_scsi_get(disk))) return -ENXIO; - drive = scsi->drive; - - drive->usage++; - return 0; } @@ -817,9 +812,6 @@ static int idescsi_ide_release(struct inode *inode, struct file *filp) { struct gendisk *disk = inode->i_bdev->bd_disk; struct ide_scsi_obj *scsi = ide_scsi_g(disk); - ide_drive_t *drive = scsi->drive; - - drive->usage--; ide_scsi_put(scsi); diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index 95045e33710..e9bd29975db 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -3770,7 +3770,8 @@ static int ipr_device_reset(struct ipr_ioa_cfg *ioa_cfg, * Return value: * 0 on success / non-zero on failure **/ -static int ipr_sata_reset(struct ata_port *ap, unsigned int *classes) +static int ipr_sata_reset(struct ata_port *ap, unsigned int *classes, + unsigned long deadline) { struct ipr_sata_port *sata_port = ap->private_data; struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg; diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index afca45cdbce..057fd7e0e37 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -518,6 +518,10 @@ lpfc_handle_eratt(struct lpfc_hba * phba) struct lpfc_sli *psli = &phba->sli; struct lpfc_sli_ring *pring; uint32_t event_data; + /* If the pci channel is offline, ignore possible errors, + * since we cannot communicate with the pci card anyway. */ + if (pci_channel_offline(phba->pcidev)) + return; if (phba->work_hs & HS_FFER6 || phba->work_hs & HS_FFER5) { @@ -1797,6 +1801,91 @@ lpfc_pci_remove_one(struct pci_dev *pdev) pci_set_drvdata(pdev, NULL); } +/** + * lpfc_io_error_detected - called when PCI error is detected + * @pdev: Pointer to PCI device + * @state: The current pci conneection state + * + * This function is called after a PCI bus error affecting + * this device has been detected. + */ +static pci_ers_result_t lpfc_io_error_detected(struct pci_dev *pdev, + pci_channel_state_t state) +{ + struct Scsi_Host *host = pci_get_drvdata(pdev); + struct lpfc_hba *phba = (struct lpfc_hba *)host->hostdata; + struct lpfc_sli *psli = &phba->sli; + struct lpfc_sli_ring *pring; + + if (state == pci_channel_io_perm_failure) + return PCI_ERS_RESULT_DISCONNECT; + + pci_disable_device(pdev); + /* + * There may be I/Os dropped by the firmware. + * Error iocb (I/O) on txcmplq and let the SCSI layer + * retry it after re-establishing link. + */ + pring = &psli->ring[psli->fcp_ring]; + lpfc_sli_abort_iocb_ring(phba, pring); + + /* Request a slot reset. */ + return PCI_ERS_RESULT_NEED_RESET; +} + +/** + * lpfc_io_slot_reset - called after the pci bus has been reset. + * @pdev: Pointer to PCI device + * + * Restart the card from scratch, as if from a cold-boot. + */ +static pci_ers_result_t lpfc_io_slot_reset(struct pci_dev *pdev) +{ + struct Scsi_Host *host = pci_get_drvdata(pdev); + struct lpfc_hba *phba = (struct lpfc_hba *)host->hostdata; + struct lpfc_sli *psli = &phba->sli; + int bars = pci_select_bars(pdev, IORESOURCE_MEM); + + dev_printk(KERN_INFO, &pdev->dev, "recovering from a slot reset.\n"); + if (pci_enable_device_bars(pdev, bars)) { + printk(KERN_ERR "lpfc: Cannot re-enable " + "PCI device after reset.\n"); + return PCI_ERS_RESULT_DISCONNECT; + } + + pci_set_master(pdev); + + /* Re-establishing Link */ + spin_lock_irq(phba->host->host_lock); + phba->fc_flag |= FC_ESTABLISH_LINK; + psli->sli_flag &= ~LPFC_SLI2_ACTIVE; + spin_unlock_irq(phba->host->host_lock); + + + /* Take device offline; this will perform cleanup */ + lpfc_offline(phba); + lpfc_sli_brdrestart(phba); + + return PCI_ERS_RESULT_RECOVERED; +} + +/** + * lpfc_io_resume - called when traffic can start flowing again. + * @pdev: Pointer to PCI device + * + * This callback is called when the error recovery driver tells us that + * its OK to resume normal operation. + */ +static void lpfc_io_resume(struct pci_dev *pdev) +{ + struct Scsi_Host *host = pci_get_drvdata(pdev); + struct lpfc_hba *phba = (struct lpfc_hba *)host->hostdata; + + if (lpfc_online(phba) == 0) { + mod_timer(&phba->fc_estabtmo, jiffies + HZ * 60); + } +} + static struct pci_device_id lpfc_id_table[] = { {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_VIPER, PCI_ANY_ID, PCI_ANY_ID, }, @@ -1857,11 +1946,18 @@ static struct pci_device_id lpfc_id_table[] = { MODULE_DEVICE_TABLE(pci, lpfc_id_table); +static struct pci_error_handlers lpfc_err_handler = { + .error_detected = lpfc_io_error_detected, + .slot_reset = lpfc_io_slot_reset, + .resume = lpfc_io_resume, +}; + static struct pci_driver lpfc_driver = { .name = LPFC_DRIVER_NAME, .id_table = lpfc_id_table, .probe = lpfc_pci_probe_one, .remove = __devexit_p(lpfc_pci_remove_one), + .err_handler = &lpfc_err_handler, }; static int __init diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index a4128e19338..9fb6960a8ad 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -2104,6 +2104,10 @@ lpfc_sli_issue_mbox(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmbox, uint32_t flag) volatile uint32_t word0, ldata; void __iomem *to_slim; + /* If the PCI channel is in offline state, do not post mbox. */ + if (unlikely(pci_channel_offline(phba->pcidev))) + return MBX_NOT_FINISHED; + psli = &phba->sli; spin_lock_irqsave(phba->host->host_lock, drvr_flag); @@ -2407,6 +2411,10 @@ lpfc_sli_issue_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, struct lpfc_iocbq *nextiocb; IOCB_t *iocb; + /* If the PCI channel is in offline state, do not post iocbs. */ + if (unlikely(pci_channel_offline(phba->pcidev))) + return IOCB_ERROR; + /* * We should never get an IOCB if we are in a < LINK_DOWN state */ @@ -3154,6 +3162,10 @@ lpfc_intr_handler(int irq, void *dev_id) if (unlikely(!phba)) return IRQ_NONE; + /* If the pci channel is offline, ignore all the interrupts. */ + if (unlikely(pci_channel_offline(phba->pcidev))) + return IRQ_NONE; + phba->sli.slistat.sli_intr++; /* diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c index 808a1b8c404..0aa3304f6b9 100644 --- a/drivers/scsi/megaraid.c +++ b/drivers/scsi/megaraid.c @@ -5072,7 +5072,7 @@ static int __init megaraid_init(void) "megaraid: failed to create megaraid root\n"); } #endif - error = pci_module_init(&megaraid_pci_driver); + error = pci_register_driver(&megaraid_pci_driver); if (error) { #ifdef CONFIG_PROC_FS remove_proc_entry("megaraid", &proc_root); diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c index 15e24fcc84f..7a812677ff8 100644 --- a/drivers/scsi/megaraid/megaraid_sas.c +++ b/drivers/scsi/megaraid/megaraid_sas.c @@ -10,11 +10,13 @@ * 2 of the License, or (at your option) any later version. * * FILE : megaraid_sas.c - * Version : v00.00.03.05 + * Version : v00.00.03.10-rc1 * * Authors: - * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com> - * Sumant Patro <Sumant.Patro@lsi.com> + * (email-id : megaraidlinux@lsi.com) + * Sreenivas Bagalkote + * Sumant Patro + * Bo Yang * * List of supported controllers * @@ -35,6 +37,7 @@ #include <asm/uaccess.h> #include <linux/fs.h> #include <linux/compat.h> +#include <linux/blkdev.h> #include <linux/mutex.h> #include <scsi/scsi.h> @@ -841,6 +844,11 @@ megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *)) instance = (struct megasas_instance *) scmd->device->host->hostdata; + + /* Don't process if we have already declared adapter dead */ + if (instance->hw_crit_error) + return SCSI_MLQUEUE_HOST_BUSY; + scmd->scsi_done = done; scmd->result = 0; @@ -850,6 +858,18 @@ megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *)) goto out_done; } + switch (scmd->cmnd[0]) { + case SYNCHRONIZE_CACHE: + /* + * FW takes care of flush cache on its own + * No need to send it down + */ + scmd->result = DID_OK << 16; + goto out_done; + default: + break; + } + cmd = megasas_get_cmd(instance); if (!cmd) return SCSI_MLQUEUE_HOST_BUSY; @@ -1010,6 +1030,49 @@ static int megasas_reset_bus_host(struct scsi_cmnd *scmd) } /** + * megasas_bios_param - Returns disk geometry for a disk + * @sdev: device handle + * @bdev: block device + * @capacity: drive capacity + * @geom: geometry parameters + */ +static int +megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev, + sector_t capacity, int geom[]) +{ + int heads; + int sectors; + sector_t cylinders; + unsigned long tmp; + /* Default heads (64) & sectors (32) */ + heads = 64; + sectors = 32; + + tmp = heads * sectors; + cylinders = capacity; + + sector_div(cylinders, tmp); + + /* + * Handle extended translation size for logical drives > 1Gb + */ + + if (capacity >= 0x200000) { + heads = 255; + sectors = 63; + tmp = heads*sectors; + cylinders = capacity; + sector_div(cylinders, tmp); + } + + geom[0] = heads; + geom[1] = sectors; + geom[2] = cylinders; + + return 0; +} + +/** * megasas_service_aen - Processes an event notification * @instance: Adapter soft state * @cmd: AEN command completed by the ISR @@ -1049,6 +1112,7 @@ static struct scsi_host_template megasas_template = { .eh_device_reset_handler = megasas_reset_device, .eh_bus_reset_handler = megasas_reset_bus_host, .eh_host_reset_handler = megasas_reset_bus_host, + .bios_param = megasas_bios_param, .use_clustering = ENABLE_CLUSTERING, }; @@ -1282,11 +1346,13 @@ megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status) if(instance->instancet->clear_intr(instance->reg_set)) return IRQ_NONE; + if (instance->hw_crit_error) + goto out_done; /* * Schedule the tasklet for cmd completion */ tasklet_schedule(&instance->isr_tasklet); - +out_done: return IRQ_HANDLED; } @@ -1741,6 +1807,10 @@ static void megasas_complete_cmd_dpc(unsigned long instance_addr) struct megasas_cmd *cmd; struct megasas_instance *instance = (struct megasas_instance *)instance_addr; + /* If we have already declared adapter dead, donot complete cmds */ + if (instance->hw_crit_error) + return; + producer = *instance->producer; consumer = *instance->consumer; @@ -2655,9 +2725,9 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance, * For each user buffer, create a mirror buffer and copy in */ for (i = 0; i < ioc->sge_count; i++) { - kbuff_arr[i] = pci_alloc_consistent(instance->pdev, + kbuff_arr[i] = dma_alloc_coherent(&instance->pdev->dev, ioc->sgl[i].iov_len, - &buf_handle); + &buf_handle, GFP_KERNEL); if (!kbuff_arr[i]) { printk(KERN_DEBUG "megasas: Failed to alloc " "kernel SGL buffer for IOCTL \n"); @@ -2684,8 +2754,8 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance, } if (ioc->sense_len) { - sense = pci_alloc_consistent(instance->pdev, ioc->sense_len, - &sense_handle); + sense = dma_alloc_coherent(&instance->pdev->dev, ioc->sense_len, + &sense_handle, GFP_KERNEL); if (!sense) { error = -ENOMEM; goto out; @@ -2744,12 +2814,12 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance, out: if (sense) { - pci_free_consistent(instance->pdev, ioc->sense_len, + dma_free_coherent(&instance->pdev->dev, ioc->sense_len, sense, sense_handle); } for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) { - pci_free_consistent(instance->pdev, + dma_free_coherent(&instance->pdev->dev, kern_sge32[i].length, kbuff_arr[i], kern_sge32[i].phys_addr); } diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index cacb3ad9252..e862992ee37 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -18,9 +18,9 @@ /* * MegaRAID SAS Driver meta data */ -#define MEGASAS_VERSION "00.00.03.05" -#define MEGASAS_RELDATE "Oct 02, 2006" -#define MEGASAS_EXT_VERSION "Mon Oct 02 11:21:32 PDT 2006" +#define MEGASAS_VERSION "00.00.03.10-rc1" +#define MEGASAS_RELDATE "Feb 14, 2007" +#define MEGASAS_EXT_VERSION "Wed Feb 14 10:14:25 PST 2007" /* * Device IDs diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c index 9668b73872c..a967fadb743 100644 --- a/drivers/scsi/osst.c +++ b/drivers/scsi/osst.c @@ -5574,14 +5574,14 @@ static ssize_t osst_version_show(struct device_driver *ddd, char *buf) static DRIVER_ATTR(version, S_IRUGO, osst_version_show, NULL); -static int osst_create_driverfs_files(struct device_driver *driverfs) +static int osst_create_sysfs_files(struct device_driver *sysfs) { - return driver_create_file(driverfs, &driver_attr_version); + return driver_create_file(sysfs, &driver_attr_version); } -static void osst_remove_driverfs_files(struct device_driver *driverfs) +static void osst_remove_sysfs_files(struct device_driver *sysfs) { - driver_remove_file(driverfs, &driver_attr_version); + driver_remove_file(sysfs, &driver_attr_version); } /* @@ -5953,7 +5953,7 @@ static int __init init_osst(void) if (err) goto err_out_chrdev; - err = osst_create_driverfs_files(&osst_template.gendrv); + err = osst_create_sysfs_files(&osst_template.gendrv); if (err) goto err_out_scsidrv; @@ -5973,7 +5973,7 @@ static void __exit exit_osst (void) int i; struct osst_tape * STp; - osst_remove_driverfs_files(&osst_template.gendrv); + osst_remove_sysfs_files(&osst_template.gendrv); scsi_unregister_driver(&osst_template.gendrv); unregister_chrdev(OSST_MAJOR, "osst"); osst_sysfs_cleanup(); diff --git a/drivers/scsi/qlogicpti.c b/drivers/scsi/qlogicpti.c index 9b827ceec50..c4195ea869e 100644 --- a/drivers/scsi/qlogicpti.c +++ b/drivers/scsi/qlogicpti.c @@ -1281,7 +1281,7 @@ static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti) (struct scatterlist *)Cmnd->request_buffer, Cmnd->use_sg, Cmnd->sc_data_direction); - } else { + } else if (Cmnd->request_bufflen) { sbus_unmap_single(qpti->sdev, (__u32)((unsigned long)Cmnd->SCp.ptr), Cmnd->request_bufflen, @@ -1403,7 +1403,7 @@ static int __devinit qpti_sbus_probe(struct of_device *dev, const struct of_devi struct scsi_host_template *tpnt = match->data; struct Scsi_Host *host; struct qlogicpti *qpti; - char *fcode; + const char *fcode; /* Sometimes Antares cards come up not completely * setup, and we get a report of a zero IRQ. diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index b8edcf5b545..918bb601954 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -716,7 +716,7 @@ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd, unsigned char *cmnd, */ if (copy_sense) { if (!SCSI_SENSE_VALID(scmd)) { - memcpy(scmd->sense_buffer, scmd->request_buffer, + memcpy(scmd->sense_buffer, page_address(sgl.page), sizeof(scmd->sense_buffer)); } __free_page(sgl.page); diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 9f7482d0b59..05d79af5ab9 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -31,7 +31,7 @@ #define SG_MEMPOOL_NR ARRAY_SIZE(scsi_sg_pools) -#define SG_MEMPOOL_SIZE 32 +#define SG_MEMPOOL_SIZE 2 struct scsi_host_sg_pool { size_t size; diff --git a/drivers/scsi/scsi_netlink.c b/drivers/scsi/scsi_netlink.c index 1b59b27e887..4bf9aa547c7 100644 --- a/drivers/scsi/scsi_netlink.c +++ b/drivers/scsi/scsi_netlink.c @@ -50,7 +50,7 @@ scsi_nl_rcv_msg(struct sk_buff *skb) while (skb->len >= NLMSG_SPACE(0)) { err = 0; - nlh = (struct nlmsghdr *) skb->data; + nlh = nlmsg_hdr(skb); if ((nlh->nlmsg_len < (sizeof(*nlh) + sizeof(*hdr))) || (skb->len < nlh->nlmsg_len)) { printk(KERN_WARNING "%s: discarding partial skb\n", @@ -168,7 +168,8 @@ scsi_netlink_init(void) } scsi_nl_sock = netlink_kernel_create(NETLINK_SCSITRANSPORT, - SCSI_NL_GRP_CNT, scsi_nl_rcv, THIS_MODULE); + SCSI_NL_GRP_CNT, scsi_nl_rcv, NULL, + THIS_MODULE); if (!scsi_nl_sock) { printk(KERN_ERR "%s: register of recieve handler failed\n", __FUNCTION__); diff --git a/drivers/scsi/scsi_proc.c b/drivers/scsi/scsi_proc.c index 69d6e9b198c..bb6f051beda 100644 --- a/drivers/scsi/scsi_proc.c +++ b/drivers/scsi/scsi_proc.c @@ -179,9 +179,8 @@ static int proc_print_scsidevice(struct device *dev, void *data) seq_printf(s, "\n"); seq_printf(s, " Type: %s ", scsi_device_type(sdev->type)); - seq_printf(s, " ANSI" - " SCSI revision: %02x", (sdev->scsi_level - 1) ? - sdev->scsi_level - 1 : 1); + seq_printf(s, " ANSI SCSI revision: %02x", + sdev->scsi_level - (sdev->scsi_level > 1)); if (sdev->scsi_level == 2) seq_printf(s, " CCS\n"); else diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index a43b9ec3aef..0949145304e 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -54,7 +54,7 @@ #define SCSI_TIMEOUT (2*HZ) /* - * Prefix values for the SCSI id's (stored in driverfs name field) + * Prefix values for the SCSI id's (stored in sysfs name field) */ #define SCSI_UID_SER_NUM 'S' #define SCSI_UID_UNKNOWN 'Z' @@ -385,6 +385,7 @@ static struct scsi_target *scsi_alloc_target(struct device *parent, INIT_LIST_HEAD(&starget->siblings); INIT_LIST_HEAD(&starget->devices); starget->state = STARGET_RUNNING; + starget->scsi_level = SCSI_2; retry: spin_lock_irqsave(shost->host_lock, flags); @@ -654,6 +655,19 @@ static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result, * short INQUIRY), an abort here prevents any further use of the * device, including spin up. * + * On the whole, the best approach seems to be to assume the first + * 36 bytes are valid no matter what the device says. That's + * better than copying < 36 bytes to the inquiry-result buffer + * and displaying garbage for the Vendor, Product, or Revision + * strings. + */ + if (sdev->inquiry_len < 36) { + printk(KERN_INFO "scsi scan: INQUIRY result too short (%d)," + " using 36\n", sdev->inquiry_len); + sdev->inquiry_len = 36; + } + + /* * Related to the above issue: * * XXX Devices (disk or all?) should be sent a TEST UNIT READY, diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index 259c90cfa36..939de0de18b 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -452,10 +452,22 @@ store_rescan_field (struct device *dev, struct device_attribute *attr, const cha } static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); +static void sdev_store_delete_callback(struct device *dev) +{ + scsi_remove_device(to_scsi_device(dev)); +} + static ssize_t sdev_store_delete(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - scsi_remove_device(to_scsi_device(dev)); + int rc; + + /* An attribute cannot be unregistered by one of its own methods, + * so we have to use this roundabout approach. + */ + rc = device_schedule_callback(dev, sdev_store_delete_callback); + if (rc) + count = rc; return count; }; static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); @@ -922,7 +934,7 @@ void scsi_sysfs_device_initialize(struct scsi_device *sdev) snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, "%d:%d:%d:%d", sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); - sdev->scsi_level = SCSI_2; + sdev->scsi_level = starget->scsi_level; transport_setup_device(&sdev->sdev_gendev); spin_lock_irqsave(shost->host_lock, flags); list_add_tail(&sdev->same_target_siblings, &starget->devices); diff --git a/drivers/scsi/scsi_tgt_if.c b/drivers/scsi/scsi_tgt_if.c index f2344ab8def..0e08817fdec 100644 --- a/drivers/scsi/scsi_tgt_if.c +++ b/drivers/scsi/scsi_tgt_if.c @@ -33,6 +33,14 @@ #include "scsi_tgt_priv.h" +#if TGT_RING_SIZE < PAGE_SIZE +# define TGT_RING_SIZE PAGE_SIZE +#endif + +#define TGT_RING_PAGES (TGT_RING_SIZE >> PAGE_SHIFT) +#define TGT_EVENT_PER_PAGE (PAGE_SIZE / sizeof(struct tgt_event)) +#define TGT_MAX_EVENTS (TGT_EVENT_PER_PAGE * TGT_RING_PAGES) + struct tgt_ring { u32 tr_idx; unsigned long tr_pages[TGT_RING_PAGES]; diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c index 0d3c10f2134..58afdb40170 100644 --- a/drivers/scsi/scsi_transport_fc.c +++ b/drivers/scsi/scsi_transport_fc.c @@ -855,7 +855,7 @@ static FC_CLASS_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, /* * Note: in the target show function we recognize when the remote - * port is in the heirarchy and do not allow the driver to get + * port is in the hierarchy and do not allow the driver to get * involved in sysfs functions. The driver only gets involved if * it's the "old" style that doesn't use rports. */ diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index ce0d14af33c..aabaa0576ab 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -1081,7 +1081,7 @@ iscsi_if_rx(struct sock *sk, int len) struct nlmsghdr *nlh; struct iscsi_uevent *ev; - nlh = (struct nlmsghdr *)skb->data; + nlh = nlmsg_hdr(skb); if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len) { break; @@ -1435,7 +1435,7 @@ static __init int iscsi_transport_init(void) if (err) goto unregister_conn_class; - nls = netlink_kernel_create(NETLINK_ISCSI, 1, iscsi_if_rx, + nls = netlink_kernel_create(NETLINK_ISCSI, 1, iscsi_if_rx, NULL, THIS_MODULE); if (!nls) { err = -ENOBUFS; diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c index 6d39150e205..b2ef71a8629 100644 --- a/drivers/scsi/scsi_transport_sas.c +++ b/drivers/scsi/scsi_transport_sas.c @@ -500,7 +500,7 @@ struct sas_phy *sas_phy_alloc(struct device *parent, int number) EXPORT_SYMBOL(sas_phy_alloc); /** - * sas_phy_add -- add a SAS PHY to the device hierachy + * sas_phy_add -- add a SAS PHY to the device hierarchy * @phy: The PHY to be added * * Publishes a SAS PHY to the rest of the system. @@ -1265,7 +1265,7 @@ struct sas_rphy *sas_expander_alloc(struct sas_port *parent, EXPORT_SYMBOL(sas_expander_alloc); /** - * sas_rphy_add -- add a SAS remote PHY to the device hierachy + * sas_rphy_add -- add a SAS remote PHY to the device hierarchy * @rphy: The remote PHY to be added * * Publishes a SAS remote PHY to the rest of the system. diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 3f048bd6326..5a8f55fea5f 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1269,9 +1269,18 @@ repeat: /* Some devices return the total number of sectors, not the * highest sector number. Make the necessary adjustment. */ - if (sdp->fix_capacity) + if (sdp->fix_capacity) { --sdkp->capacity; + /* Some devices have version which report the correct sizes + * and others which do not. We guess size according to a heuristic + * and err on the side of lowering the capacity. */ + } else { + if (sdp->guess_capacity) + if (sdkp->capacity & 0x01) /* odd sizes are odd */ + --sdkp->capacity; + } + got_data: if (sector_size == 0) { sector_size = 512; diff --git a/drivers/scsi/sgiwd93.c b/drivers/scsi/sgiwd93.c index e81f97a35bc..a15752b3799 100644 --- a/drivers/scsi/sgiwd93.c +++ b/drivers/scsi/sgiwd93.c @@ -244,9 +244,10 @@ static struct Scsi_Host * __init sgiwd93_setup_scsi( regs.SASR = wdregs + 3; regs.SCMD = wdregs + 7; - wd33c93_init(host, regs, dma_setup, dma_stop, WD33C93_FS_16_20); + wd33c93_init(host, regs, dma_setup, dma_stop, WD33C93_FS_MHZ(20)); - hdata->wh.no_sync = 0; + if (hdata->wh.no_sync == 0xff) + hdata->wh.no_sync = 0; if (request_irq(irq, sgiwd93_intr, 0, "SGI WD93", (void *) host)) { printk(KERN_WARNING "sgiwd93: Could not register irq %d " diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 3d2e02381e9..98d8411bbcc 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -195,8 +195,8 @@ static int sgl_unmap_user_pages(struct scatterlist *, const unsigned int, int); static int st_probe(struct device *); static int st_remove(struct device *); -static int do_create_driverfs_files(void); -static void do_remove_driverfs_files(void); +static int do_create_sysfs_files(void); +static void do_remove_sysfs_files(void); static int do_create_class_files(struct scsi_tape *, int, int); static struct scsi_driver st_template = { @@ -4193,7 +4193,7 @@ static int __init init_st(void) if (err) goto err_chrdev; - err = do_create_driverfs_files(); + err = do_create_sysfs_files(); if (err) goto err_scsidrv; @@ -4211,7 +4211,7 @@ err_class: static void __exit exit_st(void) { - do_remove_driverfs_files(); + do_remove_sysfs_files(); scsi_unregister_driver(&st_template.gendrv); unregister_chrdev_region(MKDEV(SCSI_TAPE_MAJOR, 0), ST_MAX_TAPE_ENTRIES); @@ -4249,43 +4249,43 @@ static ssize_t st_version_show(struct device_driver *ddd, char *buf) } static DRIVER_ATTR(version, S_IRUGO, st_version_show, NULL); -static int do_create_driverfs_files(void) +static int do_create_sysfs_files(void) { - struct device_driver *driverfs = &st_template.gendrv; + struct device_driver *sysfs = &st_template.gendrv; int err; - err = driver_create_file(driverfs, &driver_attr_try_direct_io); + err = driver_create_file(sysfs, &driver_attr_try_direct_io); if (err) return err; - err = driver_create_file(driverfs, &driver_attr_fixed_buffer_size); + err = driver_create_file(sysfs, &driver_attr_fixed_buffer_size); if (err) goto err_try_direct_io; - err = driver_create_file(driverfs, &driver_attr_max_sg_segs); + err = driver_create_file(sysfs, &driver_attr_max_sg_segs); if (err) goto err_attr_fixed_buf; - err = driver_create_file(driverfs, &driver_attr_version); + err = driver_create_file(sysfs, &driver_attr_version); if (err) goto err_attr_max_sg; return 0; err_attr_max_sg: - driver_remove_file(driverfs, &driver_attr_max_sg_segs); + driver_remove_file(sysfs, &driver_attr_max_sg_segs); err_attr_fixed_buf: - driver_remove_file(driverfs, &driver_attr_fixed_buffer_size); + driver_remove_file(sysfs, &driver_attr_fixed_buffer_size); err_try_direct_io: - driver_remove_file(driverfs, &driver_attr_try_direct_io); + driver_remove_file(sysfs, &driver_attr_try_direct_io); return err; } -static void do_remove_driverfs_files(void) +static void do_remove_sysfs_files(void) { - struct device_driver *driverfs = &st_template.gendrv; + struct device_driver *sysfs = &st_template.gendrv; - driver_remove_file(driverfs, &driver_attr_version); - driver_remove_file(driverfs, &driver_attr_max_sg_segs); - driver_remove_file(driverfs, &driver_attr_fixed_buffer_size); - driver_remove_file(driverfs, &driver_attr_try_direct_io); + driver_remove_file(sysfs, &driver_attr_version); + driver_remove_file(sysfs, &driver_attr_max_sg_segs); + driver_remove_file(sysfs, &driver_attr_fixed_buffer_size); + driver_remove_file(sysfs, &driver_attr_try_direct_io); } diff --git a/drivers/scsi/sun_esp.c b/drivers/scsi/sun_esp.c new file mode 100644 index 00000000000..8c766bcd109 --- /dev/null +++ b/drivers/scsi/sun_esp.c @@ -0,0 +1,634 @@ +/* sun_esp.c: ESP front-end for Sparc SBUS systems. + * + * Copyright (C) 2007 David S. Miller (davem@davemloft.net) + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/module.h> +#include <linux/init.h> + +#include <asm/irq.h> +#include <asm/io.h> +#include <asm/dma.h> + +#include <asm/sbus.h> + +#include <scsi/scsi_host.h> + +#include "esp_scsi.h" + +#define DRV_MODULE_NAME "sun_esp" +#define PFX DRV_MODULE_NAME ": " +#define DRV_VERSION "1.000" +#define DRV_MODULE_RELDATE "April 19, 2007" + +#define dma_read32(REG) \ + sbus_readl(esp->dma_regs + (REG)) +#define dma_write32(VAL, REG) \ + sbus_writel((VAL), esp->dma_regs + (REG)) + +static int __devinit esp_sbus_find_dma(struct esp *esp, struct sbus_dev *dma_sdev) +{ + struct sbus_dev *sdev = esp->dev; + struct sbus_dma *dma; + + if (dma_sdev != NULL) { + for_each_dvma(dma) { + if (dma->sdev == dma_sdev) + break; + } + } else { + for_each_dvma(dma) { + if (dma->sdev == NULL) + break; + + /* If bus + slot are the same and it has the + * correct OBP name, it's ours. + */ + if (sdev->bus == dma->sdev->bus && + sdev->slot == dma->sdev->slot && + (!strcmp(dma->sdev->prom_name, "dma") || + !strcmp(dma->sdev->prom_name, "espdma"))) + break; + } + } + + if (dma == NULL) { + printk(KERN_ERR PFX "[%s] Cannot find dma.\n", + sdev->ofdev.node->full_name); + return -ENODEV; + } + esp->dma = dma; + esp->dma_regs = dma->regs; + + return 0; + +} + +static int __devinit esp_sbus_map_regs(struct esp *esp, int hme) +{ + struct sbus_dev *sdev = esp->dev; + struct resource *res; + + /* On HME, two reg sets exist, first is DVMA, + * second is ESP registers. + */ + if (hme) + res = &sdev->resource[1]; + else + res = &sdev->resource[0]; + + esp->regs = sbus_ioremap(res, 0, SBUS_ESP_REG_SIZE, "ESP"); + if (!esp->regs) + return -ENOMEM; + + return 0; +} + +static int __devinit esp_sbus_map_command_block(struct esp *esp) +{ + struct sbus_dev *sdev = esp->dev; + + esp->command_block = sbus_alloc_consistent(sdev, 16, + &esp->command_block_dma); + if (!esp->command_block) + return -ENOMEM; + return 0; +} + +static int __devinit esp_sbus_register_irq(struct esp *esp) +{ + struct Scsi_Host *host = esp->host; + struct sbus_dev *sdev = esp->dev; + + host->irq = sdev->irqs[0]; + return request_irq(host->irq, scsi_esp_intr, IRQF_SHARED, "ESP", esp); +} + +static void __devinit esp_get_scsi_id(struct esp *esp) +{ + struct sbus_dev *sdev = esp->dev; + struct device_node *dp = sdev->ofdev.node; + + esp->scsi_id = of_getintprop_default(dp, "initiator-id", 0xff); + if (esp->scsi_id != 0xff) + goto done; + + esp->scsi_id = of_getintprop_default(dp, "scsi-initiator-id", 0xff); + if (esp->scsi_id != 0xff) + goto done; + + if (!sdev->bus) { + /* SUN4 */ + esp->scsi_id = 7; + goto done; + } + + esp->scsi_id = of_getintprop_default(sdev->bus->ofdev.node, + "scsi-initiator-id", 7); + +done: + esp->host->this_id = esp->scsi_id; + esp->scsi_id_mask = (1 << esp->scsi_id); +} + +static void __devinit esp_get_differential(struct esp *esp) +{ + struct sbus_dev *sdev = esp->dev; + struct device_node *dp = sdev->ofdev.node; + + if (of_find_property(dp, "differential", NULL)) + esp->flags |= ESP_FLAG_DIFFERENTIAL; + else + esp->flags &= ~ESP_FLAG_DIFFERENTIAL; +} + +static void __devinit esp_get_clock_params(struct esp *esp) +{ + struct sbus_dev *sdev = esp->dev; + struct device_node *dp = sdev->ofdev.node; + struct device_node *bus_dp; + int fmhz; + + bus_dp = NULL; + if (sdev != NULL && sdev->bus != NULL) + bus_dp = sdev->bus->ofdev.node; + + fmhz = of_getintprop_default(dp, "clock-frequency", 0); + if (fmhz == 0) + fmhz = (!bus_dp) ? 0 : + of_getintprop_default(bus_dp, "clock-frequency", 0); + + esp->cfreq = fmhz; +} + +static void __devinit esp_get_bursts(struct esp *esp, struct sbus_dev *dma) +{ + struct sbus_dev *sdev = esp->dev; + struct device_node *dp = sdev->ofdev.node; + u8 bursts; + + bursts = of_getintprop_default(dp, "burst-sizes", 0xff); + if (dma) { + struct device_node *dma_dp = dma->ofdev.node; + u8 val = of_getintprop_default(dma_dp, "burst-sizes", 0xff); + if (val != 0xff) + bursts &= val; + } + + if (sdev->bus) { + u8 val = of_getintprop_default(sdev->bus->ofdev.node, + "burst-sizes", 0xff); + if (val != 0xff) + bursts &= val; + } + + if (bursts == 0xff || + (bursts & DMA_BURST16) == 0 || + (bursts & DMA_BURST32) == 0) + bursts = (DMA_BURST32 - 1); + + esp->bursts = bursts; +} + +static void __devinit esp_sbus_get_props(struct esp *esp, struct sbus_dev *espdma) +{ + esp_get_scsi_id(esp); + esp_get_differential(esp); + esp_get_clock_params(esp); + esp_get_bursts(esp, espdma); +} + +static void sbus_esp_write8(struct esp *esp, u8 val, unsigned long reg) +{ + sbus_writeb(val, esp->regs + (reg * 4UL)); +} + +static u8 sbus_esp_read8(struct esp *esp, unsigned long reg) +{ + return sbus_readb(esp->regs + (reg * 4UL)); +} + +static dma_addr_t sbus_esp_map_single(struct esp *esp, void *buf, + size_t sz, int dir) +{ + return sbus_map_single(esp->dev, buf, sz, dir); +} + +static int sbus_esp_map_sg(struct esp *esp, struct scatterlist *sg, + int num_sg, int dir) +{ + return sbus_map_sg(esp->dev, sg, num_sg, dir); +} + +static void sbus_esp_unmap_single(struct esp *esp, dma_addr_t addr, + size_t sz, int dir) +{ + sbus_unmap_single(esp->dev, addr, sz, dir); +} + +static void sbus_esp_unmap_sg(struct esp *esp, struct scatterlist *sg, + int num_sg, int dir) +{ + sbus_unmap_sg(esp->dev, sg, num_sg, dir); +} + +static int sbus_esp_irq_pending(struct esp *esp) +{ + if (dma_read32(DMA_CSR) & (DMA_HNDL_INTR | DMA_HNDL_ERROR)) + return 1; + return 0; +} + +static void sbus_esp_reset_dma(struct esp *esp) +{ + int can_do_burst16, can_do_burst32, can_do_burst64; + int can_do_sbus64, lim; + u32 val; + + can_do_burst16 = (esp->bursts & DMA_BURST16) != 0; + can_do_burst32 = (esp->bursts & DMA_BURST32) != 0; + can_do_burst64 = 0; + can_do_sbus64 = 0; + if (sbus_can_dma_64bit(esp->dev)) + can_do_sbus64 = 1; + if (sbus_can_burst64(esp->sdev)) + can_do_burst64 = (esp->bursts & DMA_BURST64) != 0; + + /* Put the DVMA into a known state. */ + if (esp->dma->revision != dvmahme) { + val = dma_read32(DMA_CSR); + dma_write32(val | DMA_RST_SCSI, DMA_CSR); + dma_write32(val & ~DMA_RST_SCSI, DMA_CSR); + } + switch (esp->dma->revision) { + case dvmahme: + dma_write32(DMA_RESET_FAS366, DMA_CSR); + dma_write32(DMA_RST_SCSI, DMA_CSR); + + esp->prev_hme_dmacsr = (DMA_PARITY_OFF | DMA_2CLKS | + DMA_SCSI_DISAB | DMA_INT_ENAB); + + esp->prev_hme_dmacsr &= ~(DMA_ENABLE | DMA_ST_WRITE | + DMA_BRST_SZ); + + if (can_do_burst64) + esp->prev_hme_dmacsr |= DMA_BRST64; + else if (can_do_burst32) + esp->prev_hme_dmacsr |= DMA_BRST32; + + if (can_do_sbus64) { + esp->prev_hme_dmacsr |= DMA_SCSI_SBUS64; + sbus_set_sbus64(esp->dev, esp->bursts); + } + + lim = 1000; + while (dma_read32(DMA_CSR) & DMA_PEND_READ) { + if (--lim == 0) { + printk(KERN_ALERT PFX "esp%d: DMA_PEND_READ " + "will not clear!\n", + esp->host->unique_id); + break; + } + udelay(1); + } + + dma_write32(0, DMA_CSR); + dma_write32(esp->prev_hme_dmacsr, DMA_CSR); + + dma_write32(0, DMA_ADDR); + break; + + case dvmarev2: + if (esp->rev != ESP100) { + val = dma_read32(DMA_CSR); + dma_write32(val | DMA_3CLKS, DMA_CSR); + } + break; + + case dvmarev3: + val = dma_read32(DMA_CSR); + val &= ~DMA_3CLKS; + val |= DMA_2CLKS; + if (can_do_burst32) { + val &= ~DMA_BRST_SZ; + val |= DMA_BRST32; + } + dma_write32(val, DMA_CSR); + break; + + case dvmaesc1: + val = dma_read32(DMA_CSR); + val |= DMA_ADD_ENABLE; + val &= ~DMA_BCNT_ENAB; + if (!can_do_burst32 && can_do_burst16) { + val |= DMA_ESC_BURST; + } else { + val &= ~(DMA_ESC_BURST); + } + dma_write32(val, DMA_CSR); + break; + + default: + break; + } + + /* Enable interrupts. */ + val = dma_read32(DMA_CSR); + dma_write32(val | DMA_INT_ENAB, DMA_CSR); +} + +static void sbus_esp_dma_drain(struct esp *esp) +{ + u32 csr; + int lim; + + if (esp->dma->revision == dvmahme) + return; + + csr = dma_read32(DMA_CSR); + if (!(csr & DMA_FIFO_ISDRAIN)) + return; + + if (esp->dma->revision != dvmarev3 && esp->dma->revision != dvmaesc1) + dma_write32(csr | DMA_FIFO_STDRAIN, DMA_CSR); + + lim = 1000; + while (dma_read32(DMA_CSR) & DMA_FIFO_ISDRAIN) { + if (--lim == 0) { + printk(KERN_ALERT PFX "esp%d: DMA will not drain!\n", + esp->host->unique_id); + break; + } + udelay(1); + } +} + +static void sbus_esp_dma_invalidate(struct esp *esp) +{ + if (esp->dma->revision == dvmahme) { + dma_write32(DMA_RST_SCSI, DMA_CSR); + + esp->prev_hme_dmacsr = ((esp->prev_hme_dmacsr | + (DMA_PARITY_OFF | DMA_2CLKS | + DMA_SCSI_DISAB | DMA_INT_ENAB)) & + ~(DMA_ST_WRITE | DMA_ENABLE)); + + dma_write32(0, DMA_CSR); + dma_write32(esp->prev_hme_dmacsr, DMA_CSR); + + /* This is necessary to avoid having the SCSI channel + * engine lock up on us. + */ + dma_write32(0, DMA_ADDR); + } else { + u32 val; + int lim; + + lim = 1000; + while ((val = dma_read32(DMA_CSR)) & DMA_PEND_READ) { + if (--lim == 0) { + printk(KERN_ALERT PFX "esp%d: DMA will not " + "invalidate!\n", esp->host->unique_id); + break; + } + udelay(1); + } + + val &= ~(DMA_ENABLE | DMA_ST_WRITE | DMA_BCNT_ENAB); + val |= DMA_FIFO_INV; + dma_write32(val, DMA_CSR); + val &= ~DMA_FIFO_INV; + dma_write32(val, DMA_CSR); + } +} + +static void sbus_esp_send_dma_cmd(struct esp *esp, u32 addr, u32 esp_count, + u32 dma_count, int write, u8 cmd) +{ + u32 csr; + + BUG_ON(!(cmd & ESP_CMD_DMA)); + + sbus_esp_write8(esp, (esp_count >> 0) & 0xff, ESP_TCLOW); + sbus_esp_write8(esp, (esp_count >> 8) & 0xff, ESP_TCMED); + if (esp->rev == FASHME) { + sbus_esp_write8(esp, (esp_count >> 16) & 0xff, FAS_RLO); + sbus_esp_write8(esp, 0, FAS_RHI); + + scsi_esp_cmd(esp, cmd); + + csr = esp->prev_hme_dmacsr; + csr |= DMA_SCSI_DISAB | DMA_ENABLE; + if (write) + csr |= DMA_ST_WRITE; + else + csr &= ~DMA_ST_WRITE; + esp->prev_hme_dmacsr = csr; + + dma_write32(dma_count, DMA_COUNT); + dma_write32(addr, DMA_ADDR); + dma_write32(csr, DMA_CSR); + } else { + csr = dma_read32(DMA_CSR); + csr |= DMA_ENABLE; + if (write) + csr |= DMA_ST_WRITE; + else + csr &= ~DMA_ST_WRITE; + dma_write32(csr, DMA_CSR); + if (esp->dma->revision == dvmaesc1) { + u32 end = PAGE_ALIGN(addr + dma_count + 16U); + dma_write32(end - addr, DMA_COUNT); + } + dma_write32(addr, DMA_ADDR); + + scsi_esp_cmd(esp, cmd); + } + +} + +static int sbus_esp_dma_error(struct esp *esp) +{ + u32 csr = dma_read32(DMA_CSR); + + if (csr & DMA_HNDL_ERROR) + return 1; + + return 0; +} + +static const struct esp_driver_ops sbus_esp_ops = { + .esp_write8 = sbus_esp_write8, + .esp_read8 = sbus_esp_read8, + .map_single = sbus_esp_map_single, + .map_sg = sbus_esp_map_sg, + .unmap_single = sbus_esp_unmap_single, + .unmap_sg = sbus_esp_unmap_sg, + .irq_pending = sbus_esp_irq_pending, + .reset_dma = sbus_esp_reset_dma, + .dma_drain = sbus_esp_dma_drain, + .dma_invalidate = sbus_esp_dma_invalidate, + .send_dma_cmd = sbus_esp_send_dma_cmd, + .dma_error = sbus_esp_dma_error, +}; + +static int __devinit esp_sbus_probe_one(struct device *dev, + struct sbus_dev *esp_dev, + struct sbus_dev *espdma, + struct sbus_bus *sbus, + int hme) +{ + struct scsi_host_template *tpnt = &scsi_esp_template; + struct Scsi_Host *host; + struct esp *esp; + int err; + + host = scsi_host_alloc(tpnt, sizeof(struct esp)); + + err = -ENOMEM; + if (!host) + goto fail; + + host->max_id = (hme ? 16 : 8); + esp = host_to_esp(host); + + esp->host = host; + esp->dev = esp_dev; + esp->ops = &sbus_esp_ops; + + if (hme) + esp->flags |= ESP_FLAG_WIDE_CAPABLE; + + err = esp_sbus_find_dma(esp, espdma); + if (err < 0) + goto fail_unlink; + + err = esp_sbus_map_regs(esp, hme); + if (err < 0) + goto fail_unlink; + + err = esp_sbus_map_command_block(esp); + if (err < 0) + goto fail_unmap_regs; + + err = esp_sbus_register_irq(esp); + if (err < 0) + goto fail_unmap_command_block; + + esp_sbus_get_props(esp, espdma); + + /* Before we try to touch the ESP chip, ESC1 dma can + * come up with the reset bit set, so make sure that + * is clear first. + */ + if (esp->dma->revision == dvmaesc1) { + u32 val = dma_read32(DMA_CSR); + + dma_write32(val & ~DMA_RST_SCSI, DMA_CSR); + } + + dev_set_drvdata(&esp_dev->ofdev.dev, esp); + + err = scsi_esp_register(esp, dev); + if (err) + goto fail_free_irq; + + return 0; + +fail_free_irq: + free_irq(host->irq, esp); +fail_unmap_command_block: + sbus_free_consistent(esp->dev, 16, + esp->command_block, + esp->command_block_dma); +fail_unmap_regs: + sbus_iounmap(esp->regs, SBUS_ESP_REG_SIZE); +fail_unlink: + scsi_host_put(host); +fail: + return err; +} + +static int __devinit esp_sbus_probe(struct of_device *dev, const struct of_device_id *match) +{ + struct sbus_dev *sdev = to_sbus_device(&dev->dev); + struct device_node *dp = dev->node; + struct sbus_dev *dma_sdev = NULL; + int hme = 0; + + if (dp->parent && + (!strcmp(dp->parent->name, "espdma") || + !strcmp(dp->parent->name, "dma"))) + dma_sdev = sdev->parent; + else if (!strcmp(dp->name, "SUNW,fas")) { + dma_sdev = sdev; + hme = 1; + } + + return esp_sbus_probe_one(&dev->dev, sdev, dma_sdev, + sdev->bus, hme); +} + +static int __devexit esp_sbus_remove(struct of_device *dev) +{ + struct esp *esp = dev_get_drvdata(&dev->dev); + unsigned int irq = esp->host->irq; + u32 val; + + scsi_esp_unregister(esp); + + /* Disable interrupts. */ + val = dma_read32(DMA_CSR); + dma_write32(val & ~DMA_INT_ENAB, DMA_CSR); + + free_irq(irq, esp); + sbus_free_consistent(esp->dev, 16, + esp->command_block, + esp->command_block_dma); + sbus_iounmap(esp->regs, SBUS_ESP_REG_SIZE); + + scsi_host_put(esp->host); + + return 0; +} + +static struct of_device_id esp_match[] = { + { + .name = "SUNW,esp", + }, + { + .name = "SUNW,fas", + }, + { + .name = "esp", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, esp_match); + +static struct of_platform_driver esp_sbus_driver = { + .name = "esp", + .match_table = esp_match, + .probe = esp_sbus_probe, + .remove = __devexit_p(esp_sbus_remove), +}; + +static int __init sunesp_init(void) +{ + return of_register_driver(&esp_sbus_driver, &sbus_bus_type); +} + +static void __exit sunesp_exit(void) +{ + of_unregister_driver(&esp_sbus_driver); +} + +MODULE_DESCRIPTION("Sun ESP SCSI driver"); +MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); + +module_init(sunesp_init); +module_exit(sunesp_exit); diff --git a/drivers/scsi/sym53c8xx_2/sym_fw1.h b/drivers/scsi/sym53c8xx_2/sym_fw1.h index 7b39f4a35e9..7b08d6caaa9 100644 --- a/drivers/scsi/sym53c8xx_2/sym_fw1.h +++ b/drivers/scsi/sym53c8xx_2/sym_fw1.h @@ -1020,7 +1020,7 @@ static struct SYM_FWA_SCR SYM_FWA_SCR = { * It shall be a tagged command. * Read SIMPLE+TAG. * The C code will deal with errors. - * Agressive optimization, is'nt it? :) + * Aggressive optimization, isn't it? :) */ SCR_MOVE_ABS (2) ^ SCR_MSG_IN, HADDR_1 (msgin), @@ -1044,7 +1044,7 @@ static struct SYM_FWA_SCR SYM_FWA_SCR = { RADDR_1 (dsa), /* * The SIDL still contains the TAG value. - * Agressive optimization, isn't it? :):) + * Aggressive optimization, isn't it? :):) */ SCR_REG_SFBR (sidl, SCR_SHL, 0), 0, diff --git a/drivers/scsi/sym53c8xx_2/sym_fw2.h b/drivers/scsi/sym53c8xx_2/sym_fw2.h index 851f2706f22..6e5b952312e 100644 --- a/drivers/scsi/sym53c8xx_2/sym_fw2.h +++ b/drivers/scsi/sym53c8xx_2/sym_fw2.h @@ -956,7 +956,7 @@ static struct SYM_FWA_SCR SYM_FWA_SCR = { * It shall be a tagged command. * Read SIMPLE+TAG. * The C code will deal with errors. - * Agressive optimization, is'nt it? :) + * Aggressive optimization, isn't it? :) */ SCR_MOVE_ABS (2) ^ SCR_MSG_IN, HADDR_1 (msgin), @@ -968,7 +968,7 @@ static struct SYM_FWA_SCR SYM_FWA_SCR = { offsetof(struct sym_lcb, head.itlq_tbl_sa), /* * The SIDL still contains the TAG value. - * Agressive optimization, isn't it? :):) + * Aggressive optimization, isn't it? :):) */ SCR_REG_SFBR (sidl, SCR_SHL, 0), 0, diff --git a/drivers/scsi/wd33c93.c b/drivers/scsi/wd33c93.c index 835751600e9..fa4e08e508a 100644 --- a/drivers/scsi/wd33c93.c +++ b/drivers/scsi/wd33c93.c @@ -69,6 +69,11 @@ * Added support for pre -A chips, which don't have advanced features * and will generate CSR_RESEL rather than CSR_RESEL_AM. * Richard Hirst <richard@sleepie.demon.co.uk> August 2000 + * + * Added support for Burst Mode DMA and Fast SCSI. Enabled the use of + * default_sx_per for asynchronous data transfers. Added adjustment + * of transfer periods in sx_table to the actual input-clock. + * peter fuerst <post@pfrst.de> February 2007 */ #include <linux/module.h> @@ -86,9 +91,11 @@ #include "wd33c93.h" +#define optimum_sx_per(hostdata) (hostdata)->sx_table[1].period_ns + -#define WD33C93_VERSION "1.26" -#define WD33C93_DATE "22/Feb/2003" +#define WD33C93_VERSION "1.26++" +#define WD33C93_DATE "10/Feb/2007" MODULE_AUTHOR("John Shifflett"); MODULE_DESCRIPTION("Generic WD33C93 SCSI driver"); @@ -122,6 +129,13 @@ MODULE_LICENSE("GPL"); * defines in wd33c93.h * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values * would be from 8 through 20. Default is 8. + * - burst:x -x = 1 to use Burst Mode (or Demand-Mode) DMA, x = 0 to use + * Single Byte DMA, which is the default. Argument is + * optional - if not present, same as "burst:1". + * - fast:x -x = 1 to enable Fast SCSI, which is only effective with + * input-clock divisor 4 (WD33C93_FS_16_20), x = 0 to disable + * it, which is the default. Argument is optional - if not + * present, same as "fast:1". * - next -No argument. Used to separate blocks of keywords when * there's more than one host adapter in the system. * @@ -148,7 +162,7 @@ MODULE_LICENSE("GPL"); */ /* Normally, no defaults are specified */ -static char *setup_args[] = { "", "", "", "", "", "", "", "", "" }; +static char *setup_args[] = { "", "", "", "", "", "", "", "", "", "" }; static char *setup_strings; module_param(setup_strings, charp, 0); @@ -298,20 +312,8 @@ read_1_byte(const wd33c93_regs regs) return x; } -static struct sx_period sx_table[] = { - {1, 0x20}, - {252, 0x20}, - {376, 0x30}, - {500, 0x40}, - {624, 0x50}, - {752, 0x60}, - {876, 0x70}, - {1000, 0x00}, - {0, 0} -}; - static int -round_period(unsigned int period) +round_period(unsigned int period, const struct sx_period *sx_table) { int x; @@ -324,17 +326,49 @@ round_period(unsigned int period) return 7; } +/* + * Calculate Synchronous Transfer Register value from SDTR code. + */ static uchar -calc_sync_xfer(unsigned int period, unsigned int offset) +calc_sync_xfer(unsigned int period, unsigned int offset, unsigned int fast, + const struct sx_period *sx_table) { + /* When doing Fast SCSI synchronous data transfers, the corresponding + * value in 'sx_table' is two times the actually used transfer period. + */ uchar result; + if (offset && fast) { + fast = STR_FSS; + period *= 2; + } else { + fast = 0; + } period *= 4; /* convert SDTR code to ns */ - result = sx_table[round_period(period)].reg_value; + result = sx_table[round_period(period,sx_table)].reg_value; result |= (offset < OPTIMUM_SX_OFF) ? offset : OPTIMUM_SX_OFF; + result |= fast; return result; } +/* + * Calculate SDTR code bytes [3],[4] from period and offset. + */ +static inline void +calc_sync_msg(unsigned int period, unsigned int offset, unsigned int fast, + uchar msg[2]) +{ + /* 'period' is a "normal"-mode value, like the ones in 'sx_table'. The + * actually used transfer period for Fast SCSI synchronous data + * transfers is half that value. + */ + period /= 4; + if (offset && fast) + period /= 2; + msg[0] = period; + msg[1] = offset; +} + int wd33c93_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) @@ -632,7 +666,7 @@ wd33c93_execute(struct Scsi_Host *instance) write_wd33c93_count(regs, cmd->SCp.this_residual); write_wd33c93(regs, WD_CONTROL, - CTRL_IDI | CTRL_EDI | CTRL_DMA); + CTRL_IDI | CTRL_EDI | hostdata->dma_mode); hostdata->dma = D_DMA_RUNNING; } } else @@ -712,6 +746,8 @@ transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd, cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset; } + if (!cmd->SCp.this_residual) /* avoid bogus setups */ + return; write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, hostdata->sync_xfer[cmd->device->id]); @@ -744,7 +780,7 @@ transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd, #ifdef PROC_STATISTICS hostdata->dma_cnt++; #endif - write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_DMA); + write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | hostdata->dma_mode); write_wd33c93_count(regs, cmd->SCp.this_residual); if ((hostdata->level2 >= L2_DATA) || @@ -862,9 +898,6 @@ wd33c93_intr(struct Scsi_Host *instance) hostdata->outgoing_msg[0] |= 0x40; if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) { -#ifdef SYNC_DEBUG - printk(" sending SDTR "); -#endif hostdata->sync_stat[cmd->device->id] = SS_WAITING; @@ -878,14 +911,20 @@ wd33c93_intr(struct Scsi_Host *instance) hostdata->outgoing_msg[2] = 3; hostdata->outgoing_msg[3] = EXTENDED_SDTR; if (hostdata->no_sync & (1 << cmd->device->id)) { - hostdata->outgoing_msg[4] = - hostdata->default_sx_per / 4; - hostdata->outgoing_msg[5] = 0; + calc_sync_msg(hostdata->default_sx_per, 0, + 0, hostdata->outgoing_msg + 4); } else { - hostdata->outgoing_msg[4] = OPTIMUM_SX_PER / 4; - hostdata->outgoing_msg[5] = OPTIMUM_SX_OFF; + calc_sync_msg(optimum_sx_per(hostdata), + OPTIMUM_SX_OFF, + hostdata->fast, + hostdata->outgoing_msg + 4); } hostdata->outgoing_len = 6; +#ifdef SYNC_DEBUG + ucp = hostdata->outgoing_msg + 1; + printk(" sending SDTR %02x03%02x%02x%02x ", + ucp[0], ucp[2], ucp[3], ucp[4]); +#endif } else hostdata->outgoing_len = 1; @@ -1001,8 +1040,13 @@ wd33c93_intr(struct Scsi_Host *instance) #ifdef SYNC_DEBUG printk("-REJ-"); #endif - if (hostdata->sync_stat[cmd->device->id] == SS_WAITING) + if (hostdata->sync_stat[cmd->device->id] == SS_WAITING) { hostdata->sync_stat[cmd->device->id] = SS_SET; + /* we want default_sx_per, not DEFAULT_SX_PER */ + hostdata->sync_xfer[cmd->device->id] = + calc_sync_xfer(hostdata->default_sx_per + / 4, 0, 0, hostdata->sx_table); + } write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); hostdata->state = S_CONNECTED; break; @@ -1022,7 +1066,10 @@ wd33c93_intr(struct Scsi_Host *instance) switch (ucp[2]) { /* what's the EXTENDED code? */ case EXTENDED_SDTR: - id = calc_sync_xfer(ucp[3], ucp[4]); + /* default to default async period */ + id = calc_sync_xfer(hostdata-> + default_sx_per / 4, 0, + 0, hostdata->sx_table); if (hostdata->sync_stat[cmd->device->id] != SS_WAITING) { @@ -1041,20 +1088,22 @@ wd33c93_intr(struct Scsi_Host *instance) hostdata->outgoing_msg[1] = 3; hostdata->outgoing_msg[2] = EXTENDED_SDTR; - hostdata->outgoing_msg[3] = - hostdata->default_sx_per / - 4; - hostdata->outgoing_msg[4] = 0; + calc_sync_msg(hostdata-> + default_sx_per, 0, + 0, hostdata->outgoing_msg + 3); hostdata->outgoing_len = 5; - hostdata->sync_xfer[cmd->device->id] = - calc_sync_xfer(hostdata-> - default_sx_per - / 4, 0); } else { - hostdata->sync_xfer[cmd->device->id] = id; + if (ucp[4]) /* well, sync transfer */ + id = calc_sync_xfer(ucp[3], ucp[4], + hostdata->fast, + hostdata->sx_table); + else if (ucp[3]) /* very unlikely... */ + id = calc_sync_xfer(ucp[3], ucp[4], + 0, hostdata->sx_table); } + hostdata->sync_xfer[cmd->device->id] = id; #ifdef SYNC_DEBUG - printk("sync_xfer=%02x", + printk(" sync_xfer=%02x\n", hostdata->sync_xfer[cmd->device->id]); #endif hostdata->sync_stat[cmd->device->id] = @@ -1486,7 +1535,7 @@ reset_wd33c93(struct Scsi_Host *instance) write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, calc_sync_xfer(hostdata->default_sx_per / 4, - DEFAULT_SX_OFF)); + DEFAULT_SX_OFF, 0, hostdata->sx_table)); write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET); @@ -1512,6 +1561,9 @@ reset_wd33c93(struct Scsi_Host *instance) } else hostdata->chip = C_UNKNOWN_CHIP; + if (hostdata->chip != C_WD33C93B) /* Fast SCSI unavailable */ + hostdata->fast = 0; + write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE); write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); } @@ -1533,7 +1585,8 @@ wd33c93_host_reset(struct scsi_cmnd * SCpnt) for (i = 0; i < 8; i++) { hostdata->busy[i] = 0; hostdata->sync_xfer[i] = - calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF); + calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF, + 0, hostdata->sx_table); hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ } hostdata->input_Q = NULL; @@ -1782,6 +1835,98 @@ check_setup_args(char *key, int *flags, int *val, char *buf) return ++x; } +/* + * Calculate internal data-transfer-clock cycle from input-clock + * frequency (/MHz) and fill 'sx_table'. + * + * The original driver used to rely on a fixed sx_table, containing periods + * for (only) the lower limits of the respective input-clock-frequency ranges + * (8-10/12-15/16-20 MHz). Although it seems, that no problems ocurred with + * this setting so far, it might be desirable to adjust the transfer periods + * closer to the really attached, possibly 25% higher, input-clock, since + * - the wd33c93 may really use a significant shorter period, than it has + * negotiated (eg. thrashing the target, which expects 4/8MHz, with 5/10MHz + * instead). + * - the wd33c93 may ask the target for a lower transfer rate, than the target + * is capable of (eg. negotiating for an assumed minimum of 252ns instead of + * possible 200ns, which indeed shows up in tests as an approx. 10% lower + * transfer rate). + */ +static inline unsigned int +round_4(unsigned int x) +{ + switch (x & 3) { + case 1: --x; + break; + case 2: ++x; + case 3: ++x; + } + return x; +} + +static void +calc_sx_table(unsigned int mhz, struct sx_period sx_table[9]) +{ + unsigned int d, i; + if (mhz < 11) + d = 2; /* divisor for 8-10 MHz input-clock */ + else if (mhz < 16) + d = 3; /* divisor for 12-15 MHz input-clock */ + else + d = 4; /* divisor for 16-20 MHz input-clock */ + + d = (100000 * d) / 2 / mhz; /* 100 x DTCC / nanosec */ + + sx_table[0].period_ns = 1; + sx_table[0].reg_value = 0x20; + for (i = 1; i < 8; i++) { + sx_table[i].period_ns = round_4((i+1)*d / 100); + sx_table[i].reg_value = (i+1)*0x10; + } + sx_table[7].reg_value = 0; + sx_table[8].period_ns = 0; + sx_table[8].reg_value = 0; +} + +/* + * check and, maybe, map an init- or "clock:"- argument. + */ +static uchar +set_clk_freq(int freq, int *mhz) +{ + int x = freq; + if (WD33C93_FS_8_10 == freq) + freq = 8; + else if (WD33C93_FS_12_15 == freq) + freq = 12; + else if (WD33C93_FS_16_20 == freq) + freq = 16; + else if (freq > 7 && freq < 11) + x = WD33C93_FS_8_10; + else if (freq > 11 && freq < 16) + x = WD33C93_FS_12_15; + else if (freq > 15 && freq < 21) + x = WD33C93_FS_16_20; + else { + /* Hmm, wouldn't it be safer to assume highest freq here? */ + x = WD33C93_FS_8_10; + freq = 8; + } + *mhz = freq; + return x; +} + +/* + * to be used with the resync: fast: ... options + */ +static inline void set_resync ( struct WD33C93_hostdata *hd, int mask ) +{ + int i; + for (i = 0; i < 8; i++) + if (mask & (1 << i)) + hd->sync_stat[i] = SS_UNSET; +} + void wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, dma_setup_t setup, dma_stop_t stop, int clock_freq) @@ -1798,7 +1943,8 @@ wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, hostdata = (struct WD33C93_hostdata *) instance->hostdata; hostdata->regs = regs; - hostdata->clock_freq = clock_freq; + hostdata->clock_freq = set_clk_freq(clock_freq, &i); + calc_sx_table(i, hostdata->sx_table); hostdata->dma_setup = setup; hostdata->dma_stop = stop; hostdata->dma_bounce_buffer = NULL; @@ -1806,7 +1952,8 @@ wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, for (i = 0; i < 8; i++) { hostdata->busy[i] = 0; hostdata->sync_xfer[i] = - calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF); + calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF, + 0, hostdata->sx_table); hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ #ifdef PROC_STATISTICS hostdata->cmd_cnt[i] = 0; @@ -1828,6 +1975,8 @@ wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, hostdata->default_sx_per = DEFAULT_SX_PER; hostdata->no_sync = 0xff; /* sync defaults to off */ hostdata->no_dma = 0; /* default is DMA enabled */ + hostdata->fast = 0; /* default is Fast SCSI transfers disabled */ + hostdata->dma_mode = CTRL_DMA; /* default is Single Byte DMA */ #ifdef PROC_INTERFACE hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS | @@ -1839,6 +1988,11 @@ wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, #endif #endif + if (check_setup_args("clock", &flags, &val, buf)) { + hostdata->clock_freq = set_clk_freq(val, &val); + calc_sx_table(val, hostdata->sx_table); + } + if (check_setup_args("nosync", &flags, &val, buf)) hostdata->no_sync = val; @@ -1847,7 +2001,8 @@ wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, if (check_setup_args("period", &flags, &val, buf)) hostdata->default_sx_per = - sx_table[round_period((unsigned int) val)].period_ns; + hostdata->sx_table[round_period((unsigned int) val, + hostdata->sx_table)].period_ns; if (check_setup_args("disconnect", &flags, &val, buf)) { if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS)) @@ -1862,17 +2017,12 @@ wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, if (check_setup_args("debug", &flags, &val, buf)) hostdata->args = val & DB_MASK; - if (check_setup_args("clock", &flags, &val, buf)) { - if (val > 7 && val < 11) - val = WD33C93_FS_8_10; - else if (val > 11 && val < 16) - val = WD33C93_FS_12_15; - else if (val > 15 && val < 21) - val = WD33C93_FS_16_20; - else - val = WD33C93_FS_8_10; - hostdata->clock_freq = val; - } + if (check_setup_args("burst", &flags, &val, buf)) + hostdata->dma_mode = val ? CTRL_BURST:CTRL_DMA; + + if (WD33C93_FS_16_20 == hostdata->clock_freq /* divisor 4 */ + && check_setup_args("fast", &flags, &val, buf)) + hostdata->fast = !!val; if ((i = check_setup_args("next", &flags, &val, buf))) { while (i) @@ -1917,53 +2067,65 @@ wd33c93_proc_info(struct Scsi_Host *instance, char *buf, char **start, off_t off char tbuf[128]; struct WD33C93_hostdata *hd; struct scsi_cmnd *cmd; - int x, i; + int x; static int stop = 0; hd = (struct WD33C93_hostdata *) instance->hostdata; /* If 'in' is TRUE we need to _read_ the proc file. We accept the following - * keywords (same format as command-line, but only ONE per read): + * keywords (same format as command-line, but arguments are not optional): * debug * disconnect * period * resync * proc * nodma + * level2 + * burst + * fast + * nosync */ if (in) { buf[len] = '\0'; - bp = buf; + for (bp = buf; *bp; ) { + while (',' == *bp || ' ' == *bp) + ++bp; if (!strncmp(bp, "debug:", 6)) { - bp += 6; - hd->args = simple_strtoul(bp, NULL, 0) & DB_MASK; + hd->args = simple_strtoul(bp+6, &bp, 0) & DB_MASK; } else if (!strncmp(bp, "disconnect:", 11)) { - bp += 11; - x = simple_strtoul(bp, NULL, 0); + x = simple_strtoul(bp+11, &bp, 0); if (x < DIS_NEVER || x > DIS_ALWAYS) x = DIS_ADAPTIVE; hd->disconnect = x; } else if (!strncmp(bp, "period:", 7)) { - bp += 7; - x = simple_strtoul(bp, NULL, 0); + x = simple_strtoul(bp+7, &bp, 0); hd->default_sx_per = - sx_table[round_period((unsigned int) x)].period_ns; + hd->sx_table[round_period((unsigned int) x, + hd->sx_table)].period_ns; } else if (!strncmp(bp, "resync:", 7)) { - bp += 7; - x = simple_strtoul(bp, NULL, 0); - for (i = 0; i < 7; i++) - if (x & (1 << i)) - hd->sync_stat[i] = SS_UNSET; + set_resync(hd, (int)simple_strtoul(bp+7, &bp, 0)); } else if (!strncmp(bp, "proc:", 5)) { - bp += 5; - hd->proc = simple_strtoul(bp, NULL, 0); + hd->proc = simple_strtoul(bp+5, &bp, 0); } else if (!strncmp(bp, "nodma:", 6)) { - bp += 6; - hd->no_dma = simple_strtoul(bp, NULL, 0); + hd->no_dma = simple_strtoul(bp+6, &bp, 0); } else if (!strncmp(bp, "level2:", 7)) { - bp += 7; - hd->level2 = simple_strtoul(bp, NULL, 0); + hd->level2 = simple_strtoul(bp+7, &bp, 0); + } else if (!strncmp(bp, "burst:", 6)) { + hd->dma_mode = + simple_strtol(bp+6, &bp, 0) ? CTRL_BURST:CTRL_DMA; + } else if (!strncmp(bp, "fast:", 5)) { + x = !!simple_strtol(bp+5, &bp, 0); + if (x != hd->fast) + set_resync(hd, 0xff); + hd->fast = x; + } else if (!strncmp(bp, "nosync:", 7)) { + x = simple_strtoul(bp+7, &bp, 0); + set_resync(hd, x ^ hd->no_sync); + hd->no_sync = x; + } else { + break; /* unknown keyword,syntax-error,... */ + } } return len; } @@ -1977,8 +2139,9 @@ wd33c93_proc_info(struct Scsi_Host *instance, char *buf, char **start, off_t off strcat(bp, tbuf); } if (hd->proc & PR_INFO) { - sprintf(tbuf, "\nclock_freq=%02x no_sync=%02x no_dma=%d", - hd->clock_freq, hd->no_sync, hd->no_dma); + sprintf(tbuf, "\nclock_freq=%02x no_sync=%02x no_dma=%d" + " dma_mode=%02x fast=%d", + hd->clock_freq, hd->no_sync, hd->no_dma, hd->dma_mode, hd->fast); strcat(bp, tbuf); strcat(bp, "\nsync_xfer[] = "); for (x = 0; x < 7; x++) { diff --git a/drivers/scsi/wd33c93.h b/drivers/scsi/wd33c93.h index edcb0365cf0..61ffb860dac 100644 --- a/drivers/scsi/wd33c93.h +++ b/drivers/scsi/wd33c93.h @@ -155,6 +155,9 @@ #define WD33C93_FS_12_15 OWNID_FS_12 #define WD33C93_FS_16_20 OWNID_FS_16 + /* pass input-clock explicitely. accepted mhz values are 8-10,12-20 */ +#define WD33C93_FS_MHZ(mhz) (mhz) + /* Control register */ #define CTRL_HSP 0x01 #define CTRL_HA 0x02 @@ -253,6 +256,9 @@ struct WD33C93_hostdata { uchar sync_stat[8]; /* status of sync negotiation per target */ uchar no_sync; /* bitmask: don't do sync on these targets */ uchar no_dma; /* set this flag to disable DMA */ + uchar dma_mode; /* DMA Burst Mode or Single Byte DMA */ + uchar fast; /* set this flag to enable Fast SCSI */ + struct sx_period sx_table[9]; /* transfer periods for actual DTC-setting */ #ifdef PROC_INTERFACE uchar proc; /* bitmask: what's in proc output */ #ifdef PROC_STATISTICS |