diff options
Diffstat (limited to 'drivers/scsi/aha1542.c')
| -rw-r--r-- | drivers/scsi/aha1542.c | 1832 |
1 files changed, 1832 insertions, 0 deletions
diff --git a/drivers/scsi/aha1542.c b/drivers/scsi/aha1542.c new file mode 100644 index 00000000000..e9920a00959 --- /dev/null +++ b/drivers/scsi/aha1542.c @@ -0,0 +1,1832 @@ +/* $Id: aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $ + * linux/kernel/aha1542.c + * + * Copyright (C) 1992 Tommy Thorn + * Copyright (C) 1993, 1994, 1995 Eric Youngdale + * + * Modified by Eric Youngdale + * Use request_irq and request_dma to help prevent unexpected conflicts + * Set up on-board DMA controller, such that we do not have to + * have the bios enabled to use the aha1542. + * Modified by David Gentzel + * Don't call request_dma if dma mask is 0 (for BusLogic BT-445S VL-Bus + * controller). + * Modified by Matti Aarnio + * Accept parameters from LILO cmd-line. -- 1-Oct-94 + * Modified by Mike McLagan <mike.mclagan@linux.org> + * Recognise extended mode on AHA1542CP, different bit than 1542CF + * 1-Jan-97 + * Modified by Bjorn L. Thordarson and Einar Thor Einarsson + * Recognize that DMA0 is valid DMA channel -- 13-Jul-98 + * Modified by Chris Faulhaber <jedgar@fxp.org> + * Added module command-line options + * 19-Jul-99 + * Modified by Adam Fritzler <mid@auk.cx> + * Added proper detection of the AHA-1640 (MCA version of AHA-1540) + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/proc_fs.h> +#include <linux/init.h> +#include <linux/spinlock.h> +#include <linux/pci.h> +#include <linux/isapnp.h> +#include <linux/blkdev.h> +#include <linux/mca.h> +#include <linux/mca-legacy.h> + +#include <asm/dma.h> +#include <asm/system.h> +#include <asm/io.h> + +#include "scsi.h" +#include <scsi/scsi_host.h> +#include "aha1542.h" + +#define SCSI_BUF_PA(address) isa_virt_to_bus(address) +#define SCSI_SG_PA(sgent) (isa_page_to_bus((sgent)->page) + (sgent)->offset) + +static void BAD_DMA(void *address, unsigned int length) +{ + printk(KERN_CRIT "buf vaddress %p paddress 0x%lx length %d\n", + address, + SCSI_BUF_PA(address), + length); + panic("Buffer at physical address > 16Mb used for aha1542"); +} + +static void BAD_SG_DMA(Scsi_Cmnd * SCpnt, + struct scatterlist *sgpnt, + int nseg, + int badseg) +{ + printk(KERN_CRIT "sgpnt[%d:%d] page %p/0x%llx length %u\n", + badseg, nseg, + page_address(sgpnt[badseg].page) + sgpnt[badseg].offset, + (unsigned long long)SCSI_SG_PA(&sgpnt[badseg]), + sgpnt[badseg].length); + + /* + * Not safe to continue. + */ + panic("Buffer at physical address > 16Mb used for aha1542"); +} + +#include<linux/stat.h> + +#ifdef DEBUG +#define DEB(x) x +#else +#define DEB(x) +#endif + +/* + static const char RCSid[] = "$Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $"; + */ + +/* The adaptec can be configured for quite a number of addresses, but + I generally do not want the card poking around at random. We allow + two addresses - this allows people to use the Adaptec with a Midi + card, which also used 0x330 -- can be overridden with LILO! */ + +#define MAXBOARDS 4 /* Increase this and the sizes of the + arrays below, if you need more.. */ + +/* Boards 3,4 slots are reserved for ISAPnP/MCA scans */ + +static unsigned int bases[MAXBOARDS] __initdata = {0x330, 0x334, 0, 0}; + +/* set by aha1542_setup according to the command line; they also may + be marked __initdata, but require zero initializers then */ + +static int setup_called[MAXBOARDS]; +static int setup_buson[MAXBOARDS]; +static int setup_busoff[MAXBOARDS]; +static int setup_dmaspeed[MAXBOARDS] __initdata = { -1, -1, -1, -1 }; + +/* + * LILO/Module params: aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]] + * + * Where: <PORTBASE> is any of the valid AHA addresses: + * 0x130, 0x134, 0x230, 0x234, 0x330, 0x334 + * <BUSON> is the time (in microsecs) that AHA spends on the AT-bus + * when transferring data. 1542A power-on default is 11us, + * valid values are in range: 2..15 (decimal) + * <BUSOFF> is the time that AHA spends OFF THE BUS after while + * it is transferring data (not to monopolize the bus). + * Power-on default is 4us, valid range: 1..64 microseconds. + * <DMASPEED> Default is jumper selected (1542A: on the J1), + * but experimenter can alter it with this. + * Valid values: 5, 6, 7, 8, 10 (MB/s) + * Factory default is 5 MB/s. + */ + +#if defined(MODULE) +static int isapnp = 0; +static int aha1542[] = {0x330, 11, 4, -1}; +module_param_array(aha1542, int, NULL, 0); +module_param(isapnp, bool, 0); + +static struct isapnp_device_id id_table[] __initdata = { + { + ISAPNP_ANY_ID, ISAPNP_ANY_ID, + ISAPNP_VENDOR('A', 'D', 'P'), ISAPNP_FUNCTION(0x1542), + 0 + }, + {0} +}; + +MODULE_DEVICE_TABLE(isapnp, id_table); + +#else +static int isapnp = 1; +#endif + +#define BIOS_TRANSLATION_1632 0 /* Used by some old 1542A boards */ +#define BIOS_TRANSLATION_6432 1 /* Default case these days */ +#define BIOS_TRANSLATION_25563 2 /* Big disk case */ + +struct aha1542_hostdata { + /* This will effectively start both of them at the first mailbox */ + int bios_translation; /* Mapping bios uses - for compatibility */ + int aha1542_last_mbi_used; + int aha1542_last_mbo_used; + Scsi_Cmnd *SCint[AHA1542_MAILBOXES]; + struct mailbox mb[2 * AHA1542_MAILBOXES]; + struct ccb ccb[AHA1542_MAILBOXES]; +}; + +#define HOSTDATA(host) ((struct aha1542_hostdata *) &host->hostdata) + +static struct Scsi_Host *aha_host[7]; /* One for each IRQ level (9-15) */ + +static DEFINE_SPINLOCK(aha1542_lock); + + + +#define WAITnexttimeout 3000000 + +static void setup_mailboxes(int base_io, struct Scsi_Host *shpnt); +static int aha1542_restart(struct Scsi_Host *shost); +static void aha1542_intr_handle(struct Scsi_Host *shost, void *dev_id, struct pt_regs *regs); +static irqreturn_t do_aha1542_intr_handle(int irq, void *dev_id, + struct pt_regs *regs); + +#define aha1542_intr_reset(base) outb(IRST, CONTROL(base)) + +#define WAIT(port, mask, allof, noneof) \ + { register int WAITbits; \ + register int WAITtimeout = WAITnexttimeout; \ + while (1) { \ + WAITbits = inb(port) & (mask); \ + if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \ + break; \ + if (--WAITtimeout == 0) goto fail; \ + } \ + } + +/* Similar to WAIT, except we use the udelay call to regulate the + amount of time we wait. */ +#define WAITd(port, mask, allof, noneof, timeout) \ + { register int WAITbits; \ + register int WAITtimeout = timeout; \ + while (1) { \ + WAITbits = inb(port) & (mask); \ + if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \ + break; \ + mdelay(1); \ + if (--WAITtimeout == 0) goto fail; \ + } \ + } + +static void aha1542_stat(void) +{ +/* int s = inb(STATUS), i = inb(INTRFLAGS); + printk("status=%x intrflags=%x\n", s, i, WAITnexttimeout-WAITtimeout); */ +} + +/* This is a bit complicated, but we need to make sure that an interrupt + routine does not send something out while we are in the middle of this. + Fortunately, it is only at boot time that multi-byte messages + are ever sent. */ +static int aha1542_out(unsigned int base, unchar * cmdp, int len) +{ + unsigned long flags = 0; + int got_lock; + + if (len == 1) { + got_lock = 0; + while (1 == 1) { + WAIT(STATUS(base), CDF, 0, CDF); + spin_lock_irqsave(&aha1542_lock, flags); + if (inb(STATUS(base)) & CDF) { + spin_unlock_irqrestore(&aha1542_lock, flags); + continue; + } + outb(*cmdp, DATA(base)); + spin_unlock_irqrestore(&aha1542_lock, flags); + return 0; + } + } else { + spin_lock_irqsave(&aha1542_lock, flags); + got_lock = 1; + while (len--) { + WAIT(STATUS(base), CDF, 0, CDF); + outb(*cmdp++, DATA(base)); + } + spin_unlock_irqrestore(&aha1542_lock, flags); + } + return 0; +fail: + if (got_lock) + spin_unlock_irqrestore(&aha1542_lock, flags); + printk(KERN_ERR "aha1542_out failed(%d): ", len + 1); + aha1542_stat(); + return 1; +} + +/* Only used at boot time, so we do not need to worry about latency as much + here */ + +static int __init aha1542_in(unsigned int base, unchar * cmdp, int len) +{ + unsigned long flags; + + spin_lock_irqsave(&aha1542_lock, flags); + while (len--) { + WAIT(STATUS(base), DF, DF, 0); + *cmdp++ = inb(DATA(base)); + } + spin_unlock_irqrestore(&aha1542_lock, flags); + return 0; +fail: + spin_unlock_irqrestore(&aha1542_lock, flags); + printk(KERN_ERR "aha1542_in failed(%d): ", len + 1); + aha1542_stat(); + return 1; +} + +/* Similar to aha1542_in, except that we wait a very short period of time. + We use this if we know the board is alive and awake, but we are not sure + if the board will respond to the command we are about to send or not */ +static int __init aha1542_in1(unsigned int base, unchar * cmdp, int len) +{ + unsigned long flags; + + spin_lock_irqsave(&aha1542_lock, flags); + while (len--) { + WAITd(STATUS(base), DF, DF, 0, 100); + *cmdp++ = inb(DATA(base)); + } + spin_unlock_irqrestore(&aha1542_lock, flags); + return 0; +fail: + spin_unlock_irqrestore(&aha1542_lock, flags); + return 1; +} + +static int makecode(unsigned hosterr, unsigned scsierr) +{ + switch (hosterr) { + case 0x0: + case 0xa: /* Linked command complete without error and linked normally */ + case 0xb: /* Linked command complete without error, interrupt generated */ + hosterr = 0; + break; + + case 0x11: /* Selection time out-The initiator selection or target + reselection was not complete within the SCSI Time out period */ + hosterr = DID_TIME_OUT; + break; + + case 0x12: /* Data overrun/underrun-The target attempted to transfer more data + than was allocated by the Data Length field or the sum of the + Scatter / Gather Data Length fields. */ + + case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */ + + case 0x15: /* MBO command was not 00, 01 or 02-The first byte of the CB was + invalid. This usually indicates a software failure. */ + + case 0x16: /* Invalid CCB Operation Code-The first byte of the CCB was invalid. + This usually indicates a software failure. */ + + case 0x17: /* Linked CCB does not have the same LUN-A subsequent CCB of a set + of linked CCB's does not specify the same logical unit number as + the first. */ + case 0x18: /* Invalid Target Direction received from Host-The direction of a + Target Mode CCB was invalid. */ + + case 0x19: /* Duplicate CCB Received in Target Mode-More than once CCB was + received to service data transfer between the same target LUN + and initiator SCSI ID in the same direction. */ + + case 0x1a: /* Invalid CCB or Segment List Parameter-A segment list with a zero + length segment or invalid segment list boundaries was received. + A CCB parameter was invalid. */ + DEB(printk("Aha1542: %x %x\n", hosterr, scsierr)); + hosterr = DID_ERROR; /* Couldn't find any better */ + break; + + case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus + phase sequence was requested by the target. The host adapter + will generate a SCSI Reset Condition, notifying the host with + a SCRD interrupt */ + hosterr = DID_RESET; + break; + default: + printk(KERN_ERR "aha1542: makecode: unknown hoststatus %x\n", hosterr); + break; + } + return scsierr | (hosterr << 16); +} + +static int __init aha1542_test_port(int bse, struct Scsi_Host *shpnt) +{ + unchar inquiry_cmd[] = {CMD_INQUIRY}; + unchar inquiry_result[4]; + unchar *cmdp; + int len; + volatile int debug = 0; + + /* Quick and dirty test for presence of the card. */ + if (inb(STATUS(bse)) == 0xff) + return 0; + + /* Reset the adapter. I ought to make a hard reset, but it's not really necessary */ + + /* DEB(printk("aha1542_test_port called \n")); */ + + /* In case some other card was probing here, reset interrupts */ + aha1542_intr_reset(bse); /* reset interrupts, so they don't block */ + + outb(SRST | IRST /*|SCRST */ , CONTROL(bse)); + + mdelay(20); /* Wait a little bit for things to settle down. */ + + debug = 1; + /* Expect INIT and IDLE, any of the others are bad */ + WAIT(STATUS(bse), STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF); + + debug = 2; + /* Shouldn't have generated any interrupts during reset */ + if (inb(INTRFLAGS(bse)) & INTRMASK) + goto fail; + + + /* Perform a host adapter inquiry instead so we do not need to set + up the mailboxes ahead of time */ + + aha1542_out(bse, inquiry_cmd, 1); + + debug = 3; + len = 4; + cmdp = &inquiry_result[0]; + + while (len--) { + WAIT(STATUS(bse), DF, DF, 0); + *cmdp++ = inb(DATA(bse)); + } + + debug = 8; + /* Reading port should reset DF */ + if (inb(STATUS(bse)) & DF) + goto fail; + + debug = 9; + /* When HACC, command is completed, and we're though testing */ + WAIT(INTRFLAGS(bse), HACC, HACC, 0); + /* now initialize adapter */ + + debug = 10; + /* Clear interrupts */ + outb(IRST, CONTROL(bse)); + + debug = 11; + + return debug; /* 1 = ok */ +fail: + return 0; /* 0 = not ok */ +} + +/* A quick wrapper for do_aha1542_intr_handle to grab the spin lock */ +static irqreturn_t do_aha1542_intr_handle(int irq, void *dev_id, + struct pt_regs *regs) +{ + unsigned long flags; + struct Scsi_Host *shost; + + shost = aha_host[irq - 9]; + if (!shost) + panic("Splunge!"); + + spin_lock_irqsave(shost->host_lock, flags); + aha1542_intr_handle(shost, dev_id, regs); + spin_unlock_irqrestore(shost->host_lock, flags); + return IRQ_HANDLED; +} + +/* A "high" level interrupt handler */ +static void aha1542_intr_handle(struct Scsi_Host *shost, void *dev_id, struct pt_regs *regs) +{ + void (*my_done) (Scsi_Cmnd *) = NULL; + int errstatus, mbi, mbo, mbistatus; + int number_serviced; + unsigned long flags; + Scsi_Cmnd *SCtmp; + int flag; + int needs_restart; + struct mailbox *mb; + struct ccb *ccb; + + mb = HOSTDATA(shost)->mb; + ccb = HOSTDATA(shost)->ccb; + +#ifdef DEBUG + { + flag = inb(INTRFLAGS(shost->io_port)); + printk(KERN_DEBUG "aha1542_intr_handle: "); + if (!(flag & ANYINTR)) + printk("no interrupt?"); + if (flag & MBIF) + printk("MBIF "); + if (flag & MBOA) + printk("MBOF "); + if (flag & HACC) + printk("HACC "); + if (flag & SCRD) + printk("SCRD "); + printk("status %02x\n", inb(STATUS(shost->io_port))); + }; +#endif + number_serviced = 0; + needs_restart = 0; + + while (1 == 1) { + flag = inb(INTRFLAGS(shost->io_port)); + + /* Check for unusual interrupts. If any of these happen, we should + probably do something special, but for now just printing a message + is sufficient. A SCSI reset detected is something that we really + need to deal with in some way. */ + if (flag & ~MBIF) { + if (flag & MBOA) + printk("MBOF "); + if (flag & HACC) + printk("HACC "); + if (flag & SCRD) { + needs_restart = 1; + printk("SCRD "); + } + } + aha1542_intr_reset(shost->io_port); + + spin_lock_irqsave(&aha1542_lock, flags); + mbi = HOSTDATA(shost)->aha1542_last_mbi_used + 1; + if (mbi >= 2 * AHA1542_MAILBOXES) + mbi = AHA1542_MAILBOXES; + + do { + if (mb[mbi].status != 0) + break; + mbi++; + if (mbi >= 2 * AHA1542_MAILBOXES) + mbi = AHA1542_MAILBOXES; + } while (mbi != HOSTDATA(shost)->aha1542_last_mbi_used); + + if (mb[mbi].status == 0) { + spin_unlock_irqrestore(&aha1542_lock, flags); + /* Hmm, no mail. Must have read it the last time around */ + if (!number_serviced && !needs_restart) + printk(KERN_WARNING "aha1542.c: interrupt received, but no mail.\n"); + /* We detected a reset. Restart all pending commands for + devices that use the hard reset option */ + if (needs_restart) + aha1542_restart(shost); + return; + }; + + mbo = (scsi2int(mb[mbi].ccbptr) - (SCSI_BUF_PA(&ccb[0]))) / sizeof(struct ccb); + mbistatus = mb[mbi].status; + mb[mbi].status = 0; + HOSTDATA(shost)->aha1542_last_mbi_used = mbi; + spin_unlock_irqrestore(&aha1542_lock, flags); + +#ifdef DEBUG + { + if (ccb[mbo].tarstat | ccb[mbo].hastat) + printk(KERN_DEBUG "aha1542_command: returning %x (status %d)\n", + ccb[mbo].tarstat + ((int) ccb[mbo].hastat << 16), mb[mbi].status); + }; +#endif + + if (mbistatus == 3) + continue; /* Aborted command not found */ + +#ifdef DEBUG + printk(KERN_DEBUG "...done %d %d\n", mbo, mbi); +#endif + + SCtmp = HOSTDATA(shost)->SCint[mbo]; + + if (!SCtmp || !SCtmp->scsi_done) { + printk(KERN_WARNING "aha1542_intr_handle: Unexpected interrupt\n"); + printk(KERN_WARNING "tarstat=%x, hastat=%x idlun=%x ccb#=%d \n", ccb[mbo].tarstat, + ccb[mbo].hastat, ccb[mbo].idlun, mbo); + return; + } + my_done = SCtmp->scsi_done; + if (SCtmp->host_scribble) { + kfree(SCtmp->host_scribble); + SCtmp->host_scribble = NULL; + } + /* Fetch the sense data, and tuck it away, in the required slot. The + Adaptec automatically fetches it, and there is no guarantee that + we will still have it in the cdb when we come back */ + if (ccb[mbo].tarstat == 2) + memcpy(SCtmp->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen], + sizeof(SCtmp->sense_buffer)); + + + /* is there mail :-) */ + + /* more error checking left out here */ + if (mbistatus != 1) + /* This is surely wrong, but I don't know what's right */ + errstatus = makecode(ccb[mbo].hastat, ccb[mbo].tarstat); + else + errstatus = 0; + +#ifdef DEBUG + if (errstatus) + printk(KERN_DEBUG "(aha1542 error:%x %x %x) ", errstatus, + ccb[mbo].hastat, ccb[mbo].tarstat); +#endif + + if (ccb[mbo].tarstat == 2) { +#ifdef DEBUG + int i; +#endif + DEB(printk("aha1542_intr_handle: sense:")); +#ifdef DEBUG + for (i = 0; i < 12; i++) + printk("%02x ", ccb[mbo].cdb[ccb[mbo].cdblen + i]); + printk("\n"); +#endif + /* + DEB(printk("aha1542_intr_handle: buf:")); + for (i = 0; i < bufflen; i++) + printk("%02x ", ((unchar *)buff)[i]); + printk("\n"); + */ + } + DEB(if (errstatus) printk("aha1542_intr_handle: returning %6x\n", errstatus)); + SCtmp->result = errstatus; + HOSTDATA(shost)->SCint[mbo] = NULL; /* This effectively frees up the mailbox slot, as + far as queuecommand is concerned */ + my_done(SCtmp); + number_serviced++; + }; +} + +static int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *)) +{ + unchar ahacmd = CMD_START_SCSI; + unchar direction; + unchar *cmd = (unchar *) SCpnt->cmnd; + unchar target = SCpnt->device->id; + unchar lun = SCpnt->device->lun; + unsigned long flags; + void *buff = SCpnt->request_buffer; + int bufflen = SCpnt->request_bufflen; + int mbo; + struct mailbox *mb; + struct ccb *ccb; + + DEB(int i); + + mb = HOSTDATA(SCpnt->device->host)->mb; + ccb = HOSTDATA(SCpnt->device->host)->ccb; + + DEB(if (target > 1) { + SCpnt->result = DID_TIME_OUT << 16; + done(SCpnt); return 0; + } + ); + + if (*cmd == REQUEST_SENSE) { + /* Don't do the command - we have the sense data already */ +#if 0 + /* scsi_request_sense() provides a buffer of size 256, + so there is no reason to expect equality */ + if (bufflen != sizeof(SCpnt->sense_buffer)) + printk(KERN_CRIT "aha1542: Wrong buffer length supplied " + "for request sense (%d)\n", bufflen); +#endif + SCpnt->result = 0; + done(SCpnt); + return 0; + } +#ifdef DEBUG + if (*cmd == READ_10 || *cmd == WRITE_10) + i = xscsi2int(cmd + 2); + else if (*cmd == READ_6 || *cmd == WRITE_6) + i = scsi2int(cmd + 2); + else + i = -1; + if (done) + printk(KERN_DEBUG "aha1542_queuecommand: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen); + else + printk(KERN_DEBUG "aha1542_command: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen); + aha1542_stat(); + printk(KERN_DEBUG "aha1542_queuecommand: dumping scsi cmd:"); + for (i = 0; i < SCpnt->cmd_len; i++) + printk("%02x ", cmd[i]); + printk("\n"); + if (*cmd == WRITE_10 || *cmd == WRITE_6) + return 0; /* we are still testing, so *don't* write */ +#endif + /* Use the outgoing mailboxes in a round-robin fashion, because this + is how the host adapter will scan for them */ + + spin_lock_irqsave(&aha1542_lock, flags); + mbo = HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used + 1; + if (mbo >= AHA1542_MAILBOXES) + mbo = 0; + + do { + if (mb[mbo].status == 0 && HOSTDATA(SCpnt->device->host)->SCint[mbo] == NULL) + break; + mbo++; + if (mbo >= AHA1542_MAILBOXES) + mbo = 0; + } while (mbo != HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used); + + if (mb[mbo].status || HOSTDATA(SCpnt->device->host)->SCint[mbo]) + panic("Unable to find empty mailbox for aha1542.\n"); + + HOSTDATA(SCpnt->device->host)->SCint[mbo] = SCpnt; /* This will effectively prevent someone else from + screwing with this cdb. */ + + HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used = mbo; + spin_unlock_irqrestore(&aha1542_lock, flags); + +#ifdef DEBUG + printk(KERN_DEBUG "Sending command (%d %x)...", mbo, done); +#endif + + any2scsi(mb[mbo].ccbptr, SCSI_BUF_PA(&ccb[mbo])); /* This gets trashed for some reason */ + + memset(&ccb[mbo], 0, sizeof(struct ccb)); + + ccb[mbo].cdblen = SCpnt->cmd_len; + + direction = 0; + if (*cmd == READ_10 || *cmd == READ_6) + direction = 8; + else if (*cmd == WRITE_10 || *cmd == WRITE_6) + direction = 16; + + memcpy(ccb[mbo].cdb, cmd, ccb[mbo].cdblen); + + if (SCpnt->use_sg) { + struct scatterlist *sgpnt; + struct chain *cptr; +#ifdef DEBUG + unsigned char *ptr; +#endif + int i; + ccb[mbo].op = 2; /* SCSI Initiator Command w/scatter-gather */ + SCpnt->host_scribble = (unsigned char *) kmalloc(512, GFP_KERNEL | GFP_DMA); + sgpnt = (struct scatterlist *) SCpnt->request_buffer; + cptr = (struct chain *) SCpnt->host_scribble; + if (cptr == NULL) { + /* free the claimed mailbox slot */ + HOSTDATA(SCpnt->device->host)->SCint[mbo] = NULL; + return SCSI_MLQUEUE_HOST_BUSY; + } + for (i = 0; i < SCpnt->use_sg; i++) { + if (sgpnt[i].length == 0 || SCpnt->use_sg > 16 || + (((int) sgpnt[i].offset) & 1) || (sgpnt[i].length & 1)) { + unsigned char *ptr; + printk(KERN_CRIT "Bad segment list supplied to aha1542.c (%d, %d)\n", SCpnt->use_sg, i); + for (i = 0; i < SCpnt->use_sg; i++) { + printk(KERN_CRIT "%d: %p %d\n", i, + (page_address(sgpnt[i].page) + + sgpnt[i].offset), + sgpnt[i].length); + }; + printk(KERN_CRIT "cptr %x: ", (unsigned int) cptr); + ptr = (unsigned char *) &cptr[i]; + for (i = 0; i < 18; i++) + printk("%02x ", ptr[i]); + panic("Foooooooood fight!"); + }; + any2scsi(cptr[i].dataptr, SCSI_SG_PA(&sgpnt[i])); + if (SCSI_SG_PA(&sgpnt[i]) + sgpnt[i].length - 1 > ISA_DMA_THRESHOLD) + BAD_SG_DMA(SCpnt, sgpnt, SCpnt->use_sg, i); + any2scsi(cptr[i].datalen, sgpnt[i].length); + }; + any2scsi(ccb[mbo].datalen, SCpnt->use_sg * sizeof(struct chain)); + any2scsi(ccb[mbo].dataptr, SCSI_BUF_PA(cptr)); +#ifdef DEBUG + printk("cptr %x: ", cptr); + ptr = (unsigned char *) cptr; + for (i = 0; i < 18; i++) + printk("%02x ", ptr[i]); +#endif + } else { + ccb[mbo].op = 0; /* SCSI Initiator Command */ + SCpnt->host_scribble = NULL; + any2scsi(ccb[mbo].datalen, bufflen); + if (buff && SCSI_BUF_PA(buff + bufflen - 1) > ISA_DMA_THRESHOLD) + BAD_DMA(buff, bufflen); + any2scsi(ccb[mbo].dataptr, SCSI_BUF_PA(buff)); + }; + ccb[mbo].idlun = (target & 7) << 5 | direction | (lun & 7); /*SCSI Target Id */ + ccb[mbo].rsalen = 16; + ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0; + ccb[mbo].commlinkid = 0; + +#ifdef DEBUG + { + int i; + printk(KERN_DEBUG "aha1542_command: sending.. "); + for (i = 0; i < sizeof(ccb[mbo]) - 10; i++) + printk("%02x ", ((unchar *) & ccb[mbo])[i]); + }; +#endif + + if (done) { + DEB(printk("aha1542_queuecommand: now waiting for interrupt "); + aha1542_stat()); + SCpnt->scsi_done = done; + mb[mbo].status = 1; + aha1542_out(SCpnt->device->host->io_port, &ahacmd, 1); /* start scsi command */ + DEB(aha1542_stat()); + } else + printk("aha1542_queuecommand: done can't be NULL\n"); + + return 0; +} + +/* Initialize mailboxes */ +static void setup_mailboxes(int bse, struct Scsi_Host *shpnt) +{ + int i; + struct mailbox *mb; + struct ccb *ccb; + + unchar cmd[5] = { CMD_MBINIT, AHA1542_MAILBOXES, 0, 0, 0}; + + mb = HOSTDATA(shpnt)->mb; + ccb = HOSTDATA(shpnt)->ccb; + + for (i = 0; i < AHA1542_MAILBOXES; i++) { + mb[i].status = mb[AHA1542_MAILBOXES + i].status = 0; + any2scsi(mb[i].ccbptr, SCSI_BUF_PA(&ccb[i])); + }; + aha1542_intr_reset(bse); /* reset interrupts, so they don't block */ + any2scsi((cmd + 2), SCSI_BUF_PA(mb)); + aha1542_out(bse, cmd, 5); + WAIT(INTRFLAGS(bse), INTRMASK, HACC, 0); + while (0) { +fail: + printk(KERN_ERR "aha1542_detect: failed setting up mailboxes\n"); + } + aha1542_intr_reset(bse); +} + +static int __init aha1542_getconfig(int base_io, unsigned char *irq_level, unsigned char *dma_chan, unsigned char *scsi_id) +{ + unchar inquiry_cmd[] = {CMD_RETCONF}; + unchar inquiry_result[3]; + int i; + i = inb(STATUS(base_io)); + if (i & DF) { + i = inb(DATA(base_io)); + }; + aha1542_out(base_io, inquiry_cmd, 1); + aha1542_in(base_io, inquiry_result, 3); + WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0); + while (0) { +fail: + printk(KERN_ERR "aha1542_detect: query board settings\n"); + } + aha1542_intr_reset(base_io); + switch (inquiry_result[0]) { + case 0x80: + *dma_chan = 7; + break; + case 0x40: + *dma_chan = 6; + break; + case 0x20: + *dma_chan = 5; + break; + case 0x01: + *dma_chan = 0; + break; + case 0: + /* This means that the adapter, although Adaptec 1542 compatible, doesn't use a DMA channel. + Currently only aware of the BusLogic BT-445S VL-Bus adapter which needs this. */ + *dma_chan = 0xFF; + break; + default: + printk(KERN_ERR "Unable to determine Adaptec DMA priority. Disabling board\n"); + return -1; + }; + switch (inquiry_result[1]) { + case 0x40: + *irq_level = 15; + break; + case 0x20: + *irq_level = 14; + break; + case 0x8: + *irq_level = 12; + break; + case 0x4: + *irq_level = 11; + break; + case 0x2: + *irq_level = 10; + break; + case 0x1: + *irq_level = 9; + break; + default: + printk(KERN_ERR "Unable to determine Adaptec IRQ level. Disabling board\n"); + return -1; + }; + *scsi_id = inquiry_result[2] & 7; + return 0; +} + +/* This function should only be called for 1542C boards - we can detect + the special firmware settings and unlock the board */ + +static int __init aha1542_mbenable(int base) +{ + static unchar mbenable_cmd[3]; + static unchar mbenable_result[2]; + int retval; + + retval = BIOS_TRANSLATION_6432; + + mbenable_cmd[0] = CMD_EXTBIOS; + aha1542_out(base, mbenable_cmd, 1); + if (aha1542_in1(base, mbenable_result, 2)) + return retval; + WAITd(INTRFLAGS(base), INTRMASK, HACC, 0, 100); + aha1542_intr_reset(base); + + if ((mbenable_result[0] & 0x08) || mbenable_result[1]) { + mbenable_cmd[0] = CMD_MBENABLE; + mbenable_cmd[1] = 0; + mbenable_cmd[2] = mbenable_result[1]; + + if ((mbenable_result[0] & 0x08) && (mbenable_result[1] & 0x03)) + retval = BIOS_TRANSLATION_25563; + + aha1542_out(base, mbenable_cmd, 3); + WAIT(INTRFLAGS(base), INTRMASK, HACC, 0); + }; + while (0) { +fail: + printk(KERN_ERR "aha1542_mbenable: Mailbox init failed\n"); + } + aha1542_intr_reset(base); + return retval; +} + +/* Query the board to find out if it is a 1542 or a 1740, or whatever. */ +static int __init aha1542_query(int base_io, int *transl) +{ + unchar inquiry_cmd[] = {CMD_INQUIRY}; + unchar inquiry_result[4]; + int i; + i = inb(STATUS(base_io)); + if (i & DF) { + i = inb(DATA(base_io)); + }; + aha1542_out(base_io, inquiry_cmd, 1); + aha1542_in(base_io, inquiry_result, 4); + WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0); + while (0) { +fail: + printk(KERN_ERR "aha1542_detect: query card type\n"); + } + aha1542_intr_reset(base_io); + + *transl = BIOS_TRANSLATION_6432; /* Default case */ + + /* For an AHA1740 series board, we ignore the board since there is a + hardware bug which can lead to wrong blocks being returned if the board + is operating in the 1542 emulation mode. Since there is an extended mode + driver, we simply ignore the board and let the 1740 driver pick it up. + */ + + if (inquiry_result[0] == 0x43) { + printk(KERN_INFO "aha1542.c: Emulation mode not supported for AHA 174N hardware.\n"); + return 1; + }; + + /* Always call this - boards that do not support extended bios translation + will ignore the command, and we will set the proper default */ + + *transl = aha1542_mbenable(base_io); + + return 0; +} + +#ifndef MODULE +static char *setup_str[MAXBOARDS] __initdata; +static int setup_idx = 0; + +static void __init aha1542_setup(char *str, int *ints) +{ + const char *ahausage = "aha1542: usage: aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]\n"; + int setup_portbase; + + if (setup_idx >= MAXBOARDS) { + printk(KERN_ERR "aha1542: aha1542_setup called too many times! Bad LILO params ?\n"); + printk(KERN_ERR " Entryline 1: %s\n", setup_str[0]); + printk(KERN_ERR " Entryline 2: %s\n", setup_str[1]); + printk(KERN_ERR " This line: %s\n", str); + return; + } + if (ints[0] < 1 || ints[0] > 4) { + printk(KERN_ERR "aha1542: %s\n", str); + printk(ahausage); + printk(KERN_ERR "aha1542: Wrong parameters may cause system malfunction.. We try anyway..\n"); + } + setup_called[setup_idx] = ints[0]; + setup_str[setup_idx] = str; + + setup_portbase = ints[0] >= 1 ? ints[1] : 0; /* Preserve the default value.. */ + setup_buson[setup_idx] = ints[0] >= 2 ? ints[2] : 7; + setup_busoff[setup_idx] = ints[0] >= 3 ? ints[3] : 5; + if (ints[0] >= 4) + { + int atbt = -1; + switch (ints[4]) { + case 5: + atbt = 0x00; + break; + case 6: + atbt = 0x04; + break; + case 7: + atbt = 0x01; + break; + case 8: + atbt = 0x02; + break; + case 10: + atbt = 0x03; + break; + default: + printk(KERN_ERR "aha1542: %s\n", str); + printk(ahausage); + printk(KERN_ERR "aha1542: Valid values for DMASPEED are 5-8, 10 MB/s. Using jumper defaults.\n"); + break; + } + setup_dmaspeed[setup_idx] = atbt; + } + if (setup_portbase != 0) + bases[setup_idx] = setup_portbase; + + ++setup_idx; +} + +static int __init do_setup(char *str) +{ + int ints[5]; + + int count=setup_idx; + + get_options(str, sizeof(ints)/sizeof(int), ints); + aha1542_setup(str,ints); + + return count<setup_idx; +} + +__setup("aha1542=",do_setup); +#endif + +/* return non-zero on detection */ +static int __init aha1542_detect(Scsi_Host_Template * tpnt) +{ + unsigned char dma_chan; + unsigned char irq_level; + unsigned char scsi_id; + unsigned long flags; + unsigned int base_io; + int trans; + struct Scsi_Host *shpnt = NULL; + int count = 0; + int indx; + + DEB(printk("aha1542_detect: \n")); + + tpnt->proc_name = "aha1542"; + +#ifdef MODULE + bases[0] = aha1542[0]; + setup_buson[0] = aha1542[1]; + setup_busoff[0] = aha1542[2]; + { + int atbt = -1; + switch (aha1542[3]) { + case 5: + atbt = 0x00; + break; + case 6: + atbt = 0x04; + break; + case 7: + atbt = 0x01; + break; + case 8: + atbt = 0x02; + break; + case 10: + atbt = 0x03; + break; + }; + setup_dmaspeed[0] = atbt; + } +#endif + + /* + * Find MicroChannel cards (AHA1640) + */ +#ifdef CONFIG_MCA_LEGACY + if(MCA_bus) { + int slot = 0; + int pos = 0; + + for (indx = 0; (slot != MCA_NOTFOUND) && + (indx < sizeof(bases)/sizeof(bases[0])); indx++) { + + if (bases[indx]) + continue; + + /* Detect only AHA-1640 cards -- MCA ID 0F1F */ + slot = mca_find_unused_adapter(0x0f1f, slot); + if (slot == MCA_NOTFOUND) + break; + + + /* Found one */ + pos = mca_read_stored_pos(slot, 3); + + /* Decode address */ + if (pos & 0x80) { + if (pos & 0x02) { + if (pos & 0x01) + bases[indx] = 0x334; + else + bases[indx] = 0x234; + } else { + if (pos & 0x01) + bases[indx] = 0x134; + } + } else { + if (pos & 0x02) { + if (pos & 0x01) + bases[indx] = 0x330; + else + bases[indx] = 0x230; + } else { + if (pos & 0x01) + bases[indx] = 0x130; + } + } + + /* No need to decode IRQ and Arb level -- those are + * read off the card later. + */ + printk(KERN_INFO "Found an AHA-1640 in MCA slot %d, I/O 0x%04x\n", slot, bases[indx]); + + mca_set_adapter_name(slot, "Adapter AHA-1640"); + mca_set_adapter_procfn(slot, NULL, NULL); + mca_mark_as_used(slot); + + /* Go on */ + slot++; + } + + } +#endif + + /* + * Hunt for ISA Plug'n'Pray Adaptecs (AHA1535) + */ + + if(isapnp) + { + struct pnp_dev *pdev = NULL; + for(indx = 0; indx <sizeof(bases)/sizeof(bases[0]);indx++) + { + if(bases[indx]) + continue; + pdev = pnp_find_dev(NULL, ISAPNP_VENDOR('A', 'D', 'P'), + ISAPNP_FUNCTION(0x1542), pdev); + if(pdev==NULL) + break; + /* + * Activate the PnP card + */ + + if(pnp_device_attach(pdev)<0) + continue; + + if(pnp_activate_dev(pdev)<0) { + pnp_device_detach(pdev); + continue; + } + + if(!pnp_port_valid(pdev, 0)) { + pnp_device_detach(pdev); + continue; + } + + bases[indx] = pnp_port_start(pdev, 0); + + /* The card can be queried for its DMA, we have + the DMA set up that is enough */ + + printk(KERN_INFO "ISAPnP found an AHA1535 at I/O 0x%03X\n", bases[indx]); + } + } + for (indx = 0; indx < sizeof(bases) / sizeof(bases[0]); indx++) + if (bases[indx] != 0 && request_region(bases[indx], 4, "aha1542")) { + shpnt = scsi_register(tpnt, + sizeof(struct aha1542_hostdata)); + + if(shpnt==NULL) { + release_region(bases[indx], 4); + continue; + } + /* For now we do this - until kmalloc is more intelligent + we are resigned to stupid hacks like this */ + if (SCSI_BUF_PA(shpnt) >= ISA_DMA_THRESHOLD) { + printk(KERN_ERR "Invalid address for shpnt with 1542.\n"); + goto unregister; + } + if (!aha1542_test_port(bases[indx], shpnt)) + goto unregister; + + + base_io = bases[indx]; + + /* Set the Bus on/off-times as not to ruin floppy performance */ + { + unchar oncmd[] = {CMD_BUSON_TIME, 7}; + unchar offcmd[] = {CMD_BUSOFF_TIME, 5}; + + if (setup_called[indx]) { + oncmd[1] = setup_buson[indx]; + offcmd[1] = setup_busoff[indx]; + } + aha1542_intr_reset(base_io); + aha1542_out(base_io, oncmd, 2); + WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0); + aha1542_intr_reset(base_io); + aha1542_out(base_io, offcmd, 2); + WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0); + if (setup_dmaspeed[indx] >= 0) { + unchar dmacmd[] = {CMD_DMASPEED, 0}; + dmacmd[1] = setup_dmaspeed[indx]; + aha1542_intr_reset(base_io); + aha1542_out(base_io, dmacmd, 2); + WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0); + } + while (0) { +fail: + printk(KERN_ERR "aha1542_detect: setting bus on/off-time failed\n"); + } + aha1542_intr_reset(base_io); + } + if (aha1542_query(base_io, &trans)) + goto unregister; + + if (aha1542_getconfig(base_io, &irq_level, &dma_chan, &scsi_id) == -1) + goto unregister; + + printk(KERN_INFO "Configuring Adaptec (SCSI-ID %d) at IO:%x, IRQ %d", scsi_id, base_io, irq_level); + if (dma_chan != 0xFF) + printk(", DMA priority %d", dma_chan); + printk("\n"); + + DEB(aha1542_stat()); + setup_mailboxes(base_io, shpnt); + + DEB(aha1542_stat()); + + DEB(printk("aha1542_detect: enable interrupt channel %d\n", irq_level)); + spin_lock_irqsave(&aha1542_lock, flags); + if (request_irq(irq_level, do_aha1542_intr_handle, 0, "aha1542", NULL)) { + printk(KERN_ERR "Unable to allocate IRQ for adaptec controller.\n"); + spin_unlock_irqrestore(&aha1542_lock, flags); + goto unregister; + } + if (dma_chan != 0xFF) { + if (request_dma(dma_chan, "aha1542")) { + printk(KERN_ERR "Unable to allocate DMA channel for Adaptec.\n"); + free_irq(irq_level, NULL); + spin_unlock_irqrestore(&aha1542_lock, flags); + goto unregister; + } + if (dma_chan == 0 || dma_chan >= 5) { + set_dma_mode(dma_chan, DMA_MODE_CASCADE); + enable_dma(dma_chan); + } + } + aha_host[irq_level - 9] = shpnt; + shpnt->this_id = scsi_id; + shpnt->unique_id = base_io; + shpnt->io_port = base_io; + shpnt->n_io_port = 4; /* Number of bytes of I/O space used */ + shpnt->dma_channel = dma_chan; + shpnt->irq = irq_level; + HOSTDATA(shpnt)->bios_translation = trans; + if (trans == BIOS_TRANSLATION_25563) + printk(KERN_INFO "aha1542.c: Using extended bios translation\n"); + HOSTDATA(shpnt)->aha1542_last_mbi_used = (2 * AHA1542_MAILBOXES - 1); + HOSTDATA(shpnt)->aha1542_last_mbo_used = (AHA1542_MAILBOXES - 1); + memset(HOSTDATA(shpnt)->SCint, 0, sizeof(HOSTDATA(shpnt)->SCint)); + spin_unlock_irqrestore(&aha1542_lock, flags); +#if 0 + DEB(printk(" *** READ CAPACITY ***\n")); + + { + unchar buf[8]; + static unchar cmd[] = { READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; + int i; + + for (i = 0; i < sizeof(buf); ++i) + buf[i] = 0x87; + for (i = 0; i < 2; ++i) + if (!aha1542_command(i, cmd, buf, sizeof(buf))) { + printk(KERN_DEBUG "aha_detect: LU %d sector_size %d device_size %d\n", + i, xscsi2int(buf + 4), xscsi2int(buf)); + } + } + + DEB(printk(" *** NOW RUNNING MY OWN TEST *** \n")); + + for (i = 0; i < 4; ++i) { + unsigned char cmd[10]; + static buffer[512]; + + cmd[0] = READ_10; + cmd[1] = 0; + xany2scsi(cmd + 2, i); + cmd[6] = 0; + cmd[7] = 0; + cmd[8] = 1; + cmd[9] = 0; + aha1542_command(0, cmd, buffer, 512); + } +#endif + count++; + continue; +unregister: + release_region(bases[indx], 4); + scsi_unregister(shpnt); + continue; + + }; + + return count; +} + +static int aha1542_release(struct Scsi_Host *shost) +{ + if (shost->irq) + free_irq(shost->irq, NULL); + if (shost->dma_channel != 0xff) + free_dma(shost->dma_channel); + if (shost->io_port && shost->n_io_port) + release_region(shost->io_port, shost->n_io_port); + scsi_unregister(shost); + return 0; +} + +static int aha1542_restart(struct Scsi_Host *shost) +{ + int i; + int count = 0; +#if 0 + unchar ahacmd = CMD_START_SCSI; +#endif + + for (i = 0; i < AHA1542_MAILBOXES; i++) + if (HOSTDATA(shost)->SCint[i] && + !(HOSTDATA(shost)->SCint[i]->device->soft_reset)) { +#if 0 + HOSTDATA(shost)->mb[i].status = 1; /* Indicate ready to restart... */ +#endif + count++; + } + printk(KERN_DEBUG "Potential to restart %d stalled commands...\n", count); +#if 0 + /* start scsi command */ + if (count) + aha1542_out(shost->io_port, &ahacmd, 1); +#endif + return 0; +} + +static int aha1542_abort(Scsi_Cmnd * SCpnt) +{ + + /* + * The abort command does not leave the device in a clean state where + * it is available to be used again. Until this gets worked out, we + * will leave it commented out. + */ + + printk(KERN_ERR "aha1542.c: Unable to abort command for target %d\n", + SCpnt->device->id); + return FAILED; +} + +/* + * This is a device reset. This is handled by sending a special command + * to the device. + */ +static int aha1542_dev_reset(Scsi_Cmnd * SCpnt) +{ + unsigned long flags; + struct mailbox *mb; + unchar target = SCpnt->device->id; + unchar lun = SCpnt->device->lun; + int mbo; + struct ccb *ccb; + unchar ahacmd = CMD_START_SCSI; + + ccb = HOSTDATA(SCpnt->device->host)->ccb; + mb = HOSTDATA(SCpnt->device->host)->mb; + + spin_lock_irqsave(&aha1542_lock, flags); + mbo = HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used + 1; + if (mbo >= AHA1542_MAILBOXES) + mbo = 0; + + do { + if (mb[mbo].status == 0 && HOSTDATA(SCpnt->device->host)->SCint[mbo] == NULL) + break; + mbo++; + if (mbo >= AHA1542_MAILBOXES) + mbo = 0; + } while (mbo != HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used); + + if (mb[mbo].status || HOSTDATA(SCpnt->device->host)->SCint[mbo]) + panic("Unable to find empty mailbox for aha1542.\n"); + + HOSTDATA(SCpnt->device->host)->SCint[mbo] = SCpnt; /* This will effectively + prevent someone else from + screwing with this cdb. */ + + HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used = mbo; + spin_unlock_irqrestore(&aha1542_lock, flags); + + any2scsi(mb[mbo].ccbptr, SCSI_BUF_PA(&ccb[mbo])); /* This gets trashed for some reason */ + + memset(&ccb[mbo], 0, sizeof(struct ccb)); + + ccb[mbo].op = 0x81; /* BUS DEVICE RESET */ + + ccb[mbo].idlun = (target & 7) << 5 | (lun & 7); /*SCSI Target Id */ + + ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0; + ccb[mbo].commlinkid = 0; + + /* + * Now tell the 1542 to flush all pending commands for this + * target + */ + aha1542_out(SCpnt->device->host->io_port, &ahacmd, 1); + + printk(KERN_WARNING "aha1542.c: Trying device reset for target %d\n", SCpnt->device->id); + + return SUCCESS; + + +#ifdef ERIC_neverdef + /* + * With the 1542 we apparently never get an interrupt to + * acknowledge a device reset being sent. Then again, Leonard + * says we are doing this wrong in the first place... + * + * Take a wait and see attitude. If we get spurious interrupts, + * then the device reset is doing something sane and useful, and + * we will wait for the interrupt to post completion. + */ + printk(KERN_WARNING "Sent BUS DEVICE RESET to target %d\n", SCpnt->target); + + /* + * Free the command block for all commands running on this + * target... + */ + for (i = 0; i < AHA1542_MAILBOXES; i++) { + if (HOSTDATA(SCpnt->host)->SCint[i] && + HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target) { + Scsi_Cmnd *SCtmp; + SCtmp = HOSTDATA(SCpnt->host)->SCint[i]; + if (SCtmp->host_scribble) { + kfree(SCtmp->host_scribble); + SCtmp->host_scribble = NULL; + } + HOSTDATA(SCpnt->host)->SCint[i] = NULL; + HOSTDATA(SCpnt->host)->mb[i].status = 0; + } + } + return SUCCESS; + + return FAILED; +#endif /* ERIC_neverdef */ +} + +static int aha1542_bus_reset(Scsi_Cmnd * SCpnt) +{ + int i; + + /* + * This does a scsi reset for all devices on the bus. + * In principle, we could also reset the 1542 - should + * we do this? Try this first, and we can add that later + * if it turns out to be useful. + */ + outb(SCRST, CONTROL(SCpnt->device->host->io_port)); + + /* + * Wait for the thing to settle down a bit. Unfortunately + * this is going to basically lock up the machine while we + * wait for this to complete. To be 100% correct, we need to + * check for timeout, and if we are doing something like this + * we are pretty desperate anyways. + */ + spin_unlock_irq(SCpnt->device->host->host_lock); + ssleep(4); + spin_lock_irq(SCpnt->device->host->host_lock); + + WAIT(STATUS(SCpnt->device->host->io_port), + STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF); + + /* + * Now try to pick up the pieces. For all pending commands, + * free any internal data structures, and basically clear things + * out. We do not try and restart any commands or anything - + * the strategy handler takes care of that crap. + */ + printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->device->host->host_no); + + for (i = 0; i < AHA1542_MAILBOXES; i++) { + if (HOSTDATA(SCpnt->device->host)->SCint[i] != NULL) { + Scsi_Cmnd *SCtmp; + SCtmp = HOSTDATA(SCpnt->device->host)->SCint[i]; + + + if (SCtmp->device->soft_reset) { + /* + * If this device implements the soft reset option, + * then it is still holding onto the command, and + * may yet complete it. In this case, we don't + * flush the data. + */ + continue; + } + if (SCtmp->host_scribble) { + kfree(SCtmp->host_scribble); + SCtmp->host_scribble = NULL; + } + HOSTDATA(SCpnt->device->host)->SCint[i] = NULL; + HOSTDATA(SCpnt->device->host)->mb[i].status = 0; + } + } + + return SUCCESS; + +fail: + return FAILED; +} + +static int aha1542_host_reset(Scsi_Cmnd * SCpnt) +{ + int i; + + /* + * This does a scsi reset for all devices on the bus. + * In principle, we could also reset the 1542 - should + * we do this? Try this first, and we can add that later + * if it turns out to be useful. + */ + outb(HRST | SCRST, CONTROL(SCpnt->device->host->io_port)); + + /* + * Wait for the thing to settle down a bit. Unfortunately + * this is going to basically lock up the machine while we + * wait for this to complete. To be 100% correct, we need to + * check for timeout, and if we are doing something like this + * we are pretty desperate anyways. + */ + spin_unlock_irq(SCpnt->device->host->host_lock); + ssleep(4); + spin_lock_irq(SCpnt->device->host->host_lock); + + WAIT(STATUS(SCpnt->device->host->io_port), + STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF); + + /* + * We need to do this too before the 1542 can interact with + * us again. + */ + setup_mailboxes(SCpnt->device->host->io_port, SCpnt->device->host); + + /* + * Now try to pick up the pieces. For all pending commands, + * free any internal data structures, and basically clear things + * out. We do not try and restart any commands or anything - + * the strategy handler takes care of that crap. + */ + printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->device->host->host_no); + + for (i = 0; i < AHA1542_MAILBOXES; i++) { + if (HOSTDATA(SCpnt->device->host)->SCint[i] != NULL) { + Scsi_Cmnd *SCtmp; + SCtmp = HOSTDATA(SCpnt->device->host)->SCint[i]; + + if (SCtmp->device->soft_reset) { + /* + * If this device implements the soft reset option, + * then it is still holding onto the command, and + * may yet complete it. In this case, we don't + * flush the data. + */ + continue; + } + if (SCtmp->host_scribble) { + kfree(SCtmp->host_scribble); + SCtmp->host_scribble = NULL; + } + HOSTDATA(SCpnt->device->host)->SCint[i] = NULL; + HOSTDATA(SCpnt->device->host)->mb[i].status = 0; + } + } + + return SUCCESS; + +fail: + return FAILED; +} + +#if 0 +/* + * These are the old error handling routines. They are only temporarily + * here while we play with the new error handling code. + */ +static int aha1542_old_abort(Scsi_Cmnd * SCpnt) +{ +#if 0 + unchar ahacmd = CMD_START_SCSI; + unsigned long flags; + struct mailbox *mb; + int mbi, mbo, i; + + printk(KERN_DEBUG "In aha1542_abort: %x %x\n", + inb(STATUS(SCpnt->host->io_port)), + inb(INTRFLAGS(SCpnt->host->io_port))); + + spin_lock_irqsave(&aha1542_lock, flags); + mb = HOSTDATA(SCpnt->host)->mb; + mbi = HOSTDATA(SCpnt->host)->aha1542_last_mbi_used + 1; + if (mbi >= 2 * AHA1542_MAILBOXES) + mbi = AHA1542_MAILBOXES; + + do { + if (mb[mbi].status != 0) + break; + mbi++; + if (mbi >= 2 * AHA1542_MAILBOXES) + mbi = AHA1542_MAILBOXES; + } while (mbi != HOSTDATA(SCpnt->host)->aha1542_last_mbi_used); + spin_unlock_irqrestore(&aha1542_lock, flags); + + if (mb[mbi].status) { + printk(KERN_ERR "Lost interrupt discovered on irq %d - attempting to recover\n", + SCpnt->host->irq); + aha1542_intr_handle(SCpnt->host, NULL); + return 0; + } + /* OK, no lost interrupt. Try looking to see how many pending commands + we think we have. */ + + for (i = 0; i < AHA1542_MAILBOXES; i++) + if (HOSTDATA(SCpnt->host)->SCint[i]) { + if (HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) { + printk(KERN_ERR "Timed out command pending for %s\n", + SCpnt->request->rq_disk ? + SCpnt->request->rq_disk->disk_name : "?" + ); + if (HOSTDATA(SCpnt->host)->mb[i].status) { + printk(KERN_ERR "OGMB still full - restarting\n"); + aha1542_out(SCpnt->host->io_port, &ahacmd, 1); + }; + } else + printk(KERN_ERR "Other pending command %s\n", + SCpnt->request->rq_disk ? + SCpnt->request->rq_disk->disk_name : "?" + ); + } +#endif + + DEB(printk("aha1542_abort\n")); +#if 0 + spin_lock_irqsave(&aha1542_lock, flags); + for (mbo = 0; mbo < AHA1542_MAILBOXES; mbo++) { + if (SCpnt == HOSTDATA(SCpnt->host)->SCint[mbo]) { + mb[mbo].status = 2; /* Abort command */ + aha1542_out(SCpnt->host->io_port, &ahacmd, 1); /* start scsi command */ + spin_unlock_irqrestore(&aha1542_lock, flags); + break; + } + } + if (AHA1542_MAILBOXES == mbo) + spin_unlock_irqrestore(&aha1542_lock, flags); +#endif + return SCSI_ABORT_SNOOZE; +} + +/* We do not implement a reset function here, but the upper level code + assumes that it will get some kind of response for the command in + SCpnt. We must oblige, or the command will hang the scsi system. + For a first go, we assume that the 1542 notifies us with all of the + pending commands (it does implement soft reset, after all). */ + +static int aha1542_old_reset(Scsi_Cmnd * SCpnt, unsigned int reset_flags) +{ + unchar ahacmd = CMD_START_SCSI; + int i; + + /* + * See if a bus reset was suggested. + */ + if (reset_flags & SCSI_RESET_SUGGEST_BUS_RESET) { + /* + * This does a scsi reset for all devices on the bus. + * In principle, we could also reset the 1542 - should + * we do this? Try this first, and we can add that later + * if it turns out to be useful. + */ + outb(HRST | SCRST, CONTROL(SCpnt->host->io_port)); + + /* + * Wait for the thing to settle down a bit. Unfortunately + * this is going to basically lock up the machine while we + * wait for this to complete. To be 100% correct, we need to + * check for timeout, and if we are doing something like this + * we are pretty desperate anyways. + */ + WAIT(STATUS(SCpnt->host->io_port), + STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF); + + /* + * We need to do this too before the 1542 can interact with + * us again. + */ + setup_mailboxes(SCpnt->host->io_port, SCpnt->host); + + /* + * Now try to pick up the pieces. Restart all commands + * that are currently active on the bus, and reset all of + * the datastructures. We have some time to kill while + * things settle down, so print a nice message. + */ + printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->host->host_no); + + for (i = 0; i < AHA1542_MAILBOXES; i++) + if (HOSTDATA(SCpnt->host)->SCint[i] != NULL) { + Scsi_Cmnd *SCtmp; + SCtmp = HOSTDATA(SCpnt->host)->SCint[i]; + SCtmp->result = DID_RESET << 16; + if (SCtmp->host_scribble) { + kfree(SCtmp->host_scribble); + SCtmp->host_scribble = NULL; + } + printk(KERN_WARNING "Sending DID_RESET for target %d\n", SCpnt->target); + SCtmp->scsi_done(SCpnt); + + HOSTDATA(SCpnt->host)->SCint[i] = NULL; + HOSTDATA(SCpnt->host)->mb[i].status = 0; + } + /* + * Now tell the mid-level code what we did here. Since + * we have restarted all of the outstanding commands, + * then report SUCCESS. + */ + return (SCSI_RESET_SUCCESS | SCSI_RESET_BUS_RESET); +fail: + printk(KERN_CRIT "aha1542.c: Unable to perform hard reset.\n"); + printk(KERN_CRIT "Power cycle machine to reset\n"); + return (SCSI_RESET_ERROR | SCSI_RESET_BUS_RESET); + + + } else { + /* This does a selective reset of just the one device */ + /* First locate the ccb for this command */ + for (i = 0; i < AHA1542_MAILBOXES; i++) + if (HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) { + HOSTDATA(SCpnt->host)->ccb[i].op = 0x81; /* BUS DEVICE RESET */ + /* Now tell the 1542 to flush all pending commands for this target */ + aha1542_out(SCpnt->host->io_port, &ahacmd, 1); + + /* Here is the tricky part. What to do next. Do we get an interrupt + for the commands that we aborted with the specified target, or + do we generate this on our own? Try it without first and see + what happens */ + printk(KERN_WARNING "Sent BUS DEVICE RESET to target %d\n", SCpnt->target); + + /* If the first does not work, then try the second. I think the + first option is more likely to be correct. Free the command + block for all commands running on this target... */ + for (i = 0; i < AHA1542_MAILBOXES; i++) + if (HOSTDATA(SCpnt->host)->SCint[i] && + HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target) { + Scsi_Cmnd *SCtmp; + SCtmp = HOSTDATA(SCpnt->host)->SCint[i]; + SCtmp->result = DID_RESET << 16; + if (SCtmp->host_scribble) { + kfree(SCtmp->host_scribble); + SCtmp->host_scribble = NULL; + } + printk(KERN_WARNING "Sending DID_RESET for target %d\n", SCpnt->target); + SCtmp->scsi_done(SCpnt); + + HOSTDATA(SCpnt->host)->SCint[i] = NULL; + HOSTDATA(SCpnt->host)->mb[i].status = 0; + } + return SCSI_RESET_SUCCESS; + } + } + /* No active command at this time, so this means that each time we got + some kind of response the last time through. Tell the mid-level code + to request sense information in order to decide what to do next. */ + return SCSI_RESET_PUNT; +} +#endif /* end of big comment block around old_abort + old_reset */ + +static int aha1542_biosparam(struct scsi_device *sdev, + struct block_device *bdev, sector_t capacity, int *ip) +{ + int translation_algorithm; + int size = capacity; + + translation_algorithm = HOSTDATA(sdev->host)->bios_translation; + + if ((size >> 11) > 1024 && translation_algorithm == BIOS_TRANSLATION_25563) { + /* Please verify that this is the same as what DOS returns */ + ip[0] = 255; + ip[1] = 63; + ip[2] = size / 255 / 63; + } else { + ip[0] = 64; + ip[1] = 32; + ip[2] = size >> 11; + } + + return 0; +} +MODULE_LICENSE("GPL"); + + +static Scsi_Host_Template driver_template = { + .proc_name = "aha1542", + .name = "Adaptec 1542", + .detect = aha1542_detect, + .release = aha1542_release, + .queuecommand = aha1542_queuecommand, + .eh_abort_handler = aha1542_abort, + .eh_device_reset_handler= aha1542_dev_reset, + .eh_bus_reset_handler = aha1542_bus_reset, + .eh_host_reset_handler = aha1542_host_reset, + .bios_param = aha1542_biosparam, + .can_queue = AHA1542_MAILBOXES, + .this_id = 7, + .sg_tablesize = AHA1542_SCATTER, + .cmd_per_lun = AHA1542_CMDLUN, + .unchecked_isa_dma = 1, + .use_clustering = ENABLE_CLUSTERING, +}; +#include "scsi_module.c" |