diff options
Diffstat (limited to 'drivers/ata/sata_sil24.c')
| -rw-r--r-- | drivers/ata/sata_sil24.c | 1227 |
1 files changed, 1227 insertions, 0 deletions
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c new file mode 100644 index 00000000000..39cb07baeba --- /dev/null +++ b/drivers/ata/sata_sil24.c @@ -0,0 +1,1227 @@ +/* + * sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers + * + * Copyright 2005 Tejun Heo + * + * Based on preview driver from Silicon Image. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/blkdev.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/dma-mapping.h> +#include <linux/device.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_cmnd.h> +#include <linux/libata.h> +#include <asm/io.h> + +#define DRV_NAME "sata_sil24" +#define DRV_VERSION "0.3" + +/* + * Port request block (PRB) 32 bytes + */ +struct sil24_prb { + __le16 ctrl; + __le16 prot; + __le32 rx_cnt; + u8 fis[6 * 4]; +}; + +/* + * Scatter gather entry (SGE) 16 bytes + */ +struct sil24_sge { + __le64 addr; + __le32 cnt; + __le32 flags; +}; + +/* + * Port multiplier + */ +struct sil24_port_multiplier { + __le32 diag; + __le32 sactive; +}; + +enum { + /* + * Global controller registers (128 bytes @ BAR0) + */ + /* 32 bit regs */ + HOST_SLOT_STAT = 0x00, /* 32 bit slot stat * 4 */ + HOST_CTRL = 0x40, + HOST_IRQ_STAT = 0x44, + HOST_PHY_CFG = 0x48, + HOST_BIST_CTRL = 0x50, + HOST_BIST_PTRN = 0x54, + HOST_BIST_STAT = 0x58, + HOST_MEM_BIST_STAT = 0x5c, + HOST_FLASH_CMD = 0x70, + /* 8 bit regs */ + HOST_FLASH_DATA = 0x74, + HOST_TRANSITION_DETECT = 0x75, + HOST_GPIO_CTRL = 0x76, + HOST_I2C_ADDR = 0x78, /* 32 bit */ + HOST_I2C_DATA = 0x7c, + HOST_I2C_XFER_CNT = 0x7e, + HOST_I2C_CTRL = 0x7f, + + /* HOST_SLOT_STAT bits */ + HOST_SSTAT_ATTN = (1 << 31), + + /* HOST_CTRL bits */ + HOST_CTRL_M66EN = (1 << 16), /* M66EN PCI bus signal */ + HOST_CTRL_TRDY = (1 << 17), /* latched PCI TRDY */ + HOST_CTRL_STOP = (1 << 18), /* latched PCI STOP */ + HOST_CTRL_DEVSEL = (1 << 19), /* latched PCI DEVSEL */ + HOST_CTRL_REQ64 = (1 << 20), /* latched PCI REQ64 */ + HOST_CTRL_GLOBAL_RST = (1 << 31), /* global reset */ + + /* + * Port registers + * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2) + */ + PORT_REGS_SIZE = 0x2000, + + PORT_LRAM = 0x0000, /* 31 LRAM slots and PM regs */ + PORT_LRAM_SLOT_SZ = 0x0080, /* 32 bytes PRB + 2 SGE, ACT... */ + + PORT_PM = 0x0f80, /* 8 bytes PM * 16 (128 bytes) */ + /* 32 bit regs */ + PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */ + PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */ + PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */ + PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */ + PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */ + PORT_ACTIVATE_UPPER_ADDR= 0x101c, + PORT_EXEC_FIFO = 0x1020, /* command execution fifo */ + PORT_CMD_ERR = 0x1024, /* command error number */ + PORT_FIS_CFG = 0x1028, + PORT_FIFO_THRES = 0x102c, + /* 16 bit regs */ + PORT_DECODE_ERR_CNT = 0x1040, + PORT_DECODE_ERR_THRESH = 0x1042, + PORT_CRC_ERR_CNT = 0x1044, + PORT_CRC_ERR_THRESH = 0x1046, + PORT_HSHK_ERR_CNT = 0x1048, + PORT_HSHK_ERR_THRESH = 0x104a, + /* 32 bit regs */ + PORT_PHY_CFG = 0x1050, + PORT_SLOT_STAT = 0x1800, + PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */ + PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */ + PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */ + PORT_SCONTROL = 0x1f00, + PORT_SSTATUS = 0x1f04, + PORT_SERROR = 0x1f08, + PORT_SACTIVE = 0x1f0c, + + /* PORT_CTRL_STAT bits */ + PORT_CS_PORT_RST = (1 << 0), /* port reset */ + PORT_CS_DEV_RST = (1 << 1), /* device reset */ + PORT_CS_INIT = (1 << 2), /* port initialize */ + PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */ + PORT_CS_CDB16 = (1 << 5), /* 0=12b cdb, 1=16b cdb */ + PORT_CS_RESUME = (1 << 6), /* port resume */ + PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */ + PORT_CS_PM_EN = (1 << 13), /* port multiplier enable */ + PORT_CS_RDY = (1 << 31), /* port ready to accept commands */ + + /* PORT_IRQ_STAT/ENABLE_SET/CLR */ + /* bits[11:0] are masked */ + PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */ + PORT_IRQ_ERROR = (1 << 1), /* command execution error */ + PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */ + PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */ + PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */ + PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */ + PORT_IRQ_UNK_FIS = (1 << 6), /* unknown FIS received */ + PORT_IRQ_DEV_XCHG = (1 << 7), /* device exchanged */ + PORT_IRQ_8B10B = (1 << 8), /* 8b/10b decode error threshold */ + PORT_IRQ_CRC = (1 << 9), /* CRC error threshold */ + PORT_IRQ_HANDSHAKE = (1 << 10), /* handshake error threshold */ + PORT_IRQ_SDB_NOTIFY = (1 << 11), /* SDB notify received */ + + DEF_PORT_IRQ = PORT_IRQ_COMPLETE | PORT_IRQ_ERROR | + PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG | + PORT_IRQ_UNK_FIS, + + /* bits[27:16] are unmasked (raw) */ + PORT_IRQ_RAW_SHIFT = 16, + PORT_IRQ_MASKED_MASK = 0x7ff, + PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT), + + /* ENABLE_SET/CLR specific, intr steering - 2 bit field */ + PORT_IRQ_STEER_SHIFT = 30, + PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT), + + /* PORT_CMD_ERR constants */ + PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */ + PORT_CERR_SDB = 2, /* Error bit in SDB FIS */ + PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */ + PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */ + PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */ + PORT_CERR_DIRECTION = 6, /* Data direction mismatch */ + PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */ + PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */ + PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */ + PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */ + PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */ + PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */ + PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */ + PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */ + PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */ + PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */ + PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */ + PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */ + PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */ + PORT_CERR_XFR_MSTABRT = 34, /* PSD ecode 10 - master abort */ + PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */ + PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */ + + /* bits of PRB control field */ + PRB_CTRL_PROTOCOL = (1 << 0), /* override def. ATA protocol */ + PRB_CTRL_PACKET_READ = (1 << 4), /* PACKET cmd read */ + PRB_CTRL_PACKET_WRITE = (1 << 5), /* PACKET cmd write */ + PRB_CTRL_NIEN = (1 << 6), /* Mask completion irq */ + PRB_CTRL_SRST = (1 << 7), /* Soft reset request (ign BSY?) */ + + /* PRB protocol field */ + PRB_PROT_PACKET = (1 << 0), + PRB_PROT_TCQ = (1 << 1), + PRB_PROT_NCQ = (1 << 2), + PRB_PROT_READ = (1 << 3), + PRB_PROT_WRITE = (1 << 4), + PRB_PROT_TRANSPARENT = (1 << 5), + + /* + * Other constants + */ + SGE_TRM = (1 << 31), /* Last SGE in chain */ + SGE_LNK = (1 << 30), /* linked list + Points to SGT, not SGE */ + SGE_DRD = (1 << 29), /* discard data read (/dev/null) + data address ignored */ + + SIL24_MAX_CMDS = 31, + + /* board id */ + BID_SIL3124 = 0, + BID_SIL3132 = 1, + BID_SIL3131 = 2, + + /* host flags */ + SIL24_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | + ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | + ATA_FLAG_NCQ | ATA_FLAG_SKIP_D2H_BSY, + SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */ + + IRQ_STAT_4PORTS = 0xf, +}; + +struct sil24_ata_block { + struct sil24_prb prb; + struct sil24_sge sge[LIBATA_MAX_PRD]; +}; + +struct sil24_atapi_block { + struct sil24_prb prb; + u8 cdb[16]; + struct sil24_sge sge[LIBATA_MAX_PRD - 1]; +}; + +union sil24_cmd_block { + struct sil24_ata_block ata; + struct sil24_atapi_block atapi; +}; + +static struct sil24_cerr_info { + unsigned int err_mask, action; + const char *desc; +} sil24_cerr_db[] = { + [0] = { AC_ERR_DEV, ATA_EH_REVALIDATE, + "device error" }, + [PORT_CERR_DEV] = { AC_ERR_DEV, ATA_EH_REVALIDATE, + "device error via D2H FIS" }, + [PORT_CERR_SDB] = { AC_ERR_DEV, ATA_EH_REVALIDATE, + "device error via SDB FIS" }, + [PORT_CERR_DATA] = { AC_ERR_ATA_BUS, ATA_EH_SOFTRESET, + "error in data FIS" }, + [PORT_CERR_SEND] = { AC_ERR_ATA_BUS, ATA_EH_SOFTRESET, + "failed to transmit command FIS" }, + [PORT_CERR_INCONSISTENT] = { AC_ERR_HSM, ATA_EH_SOFTRESET, + "protocol mismatch" }, + [PORT_CERR_DIRECTION] = { AC_ERR_HSM, ATA_EH_SOFTRESET, + "data directon mismatch" }, + [PORT_CERR_UNDERRUN] = { AC_ERR_HSM, ATA_EH_SOFTRESET, + "ran out of SGEs while writing" }, + [PORT_CERR_OVERRUN] = { AC_ERR_HSM, ATA_EH_SOFTRESET, + "ran out of SGEs while reading" }, + [PORT_CERR_PKT_PROT] = { AC_ERR_HSM, ATA_EH_SOFTRESET, + "invalid data directon for ATAPI CDB" }, + [PORT_CERR_SGT_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_SOFTRESET, + "SGT no on qword boundary" }, + [PORT_CERR_SGT_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI target abort while fetching SGT" }, + [PORT_CERR_SGT_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI master abort while fetching SGT" }, + [PORT_CERR_SGT_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI parity error while fetching SGT" }, + [PORT_CERR_CMD_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_SOFTRESET, + "PRB not on qword boundary" }, + [PORT_CERR_CMD_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI target abort while fetching PRB" }, + [PORT_CERR_CMD_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI master abort while fetching PRB" }, + [PORT_CERR_CMD_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI parity error while fetching PRB" }, + [PORT_CERR_XFR_UNDEF] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "undefined error while transferring data" }, + [PORT_CERR_XFR_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI target abort while transferring data" }, + [PORT_CERR_XFR_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI master abort while transferring data" }, + [PORT_CERR_XFR_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI parity error while transferring data" }, + [PORT_CERR_SENDSERVICE] = { AC_ERR_HSM, ATA_EH_SOFTRESET, + "FIS received while sending service FIS" }, +}; + +/* + * ap->private_data + * + * The preview driver always returned 0 for status. We emulate it + * here from the previous interrupt. + */ +struct sil24_port_priv { + union sil24_cmd_block *cmd_block; /* 32 cmd blocks */ + dma_addr_t cmd_block_dma; /* DMA base addr for them */ + struct ata_taskfile tf; /* Cached taskfile registers */ +}; + +/* ap->host->private_data */ +struct sil24_host_priv { + void __iomem *host_base; /* global controller control (128 bytes @BAR0) */ + void __iomem *port_base; /* port registers (4 * 8192 bytes @BAR2) */ +}; + +static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev); +static u8 sil24_check_status(struct ata_port *ap); +static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg); +static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val); +static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf); +static void sil24_qc_prep(struct ata_queued_cmd *qc); +static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc); +static void sil24_irq_clear(struct ata_port *ap); +static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs); +static void sil24_freeze(struct ata_port *ap); +static void sil24_thaw(struct ata_port *ap); +static void sil24_error_handler(struct ata_port *ap); +static void sil24_post_internal_cmd(struct ata_queued_cmd *qc); +static int sil24_port_start(struct ata_port *ap); +static void sil24_port_stop(struct ata_port *ap); +static void sil24_host_stop(struct ata_host *host); +static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); +#ifdef CONFIG_PM +static int sil24_pci_device_resume(struct pci_dev *pdev); +#endif + +static const struct pci_device_id sil24_pci_tbl[] = { + { 0x1095, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 }, + { 0x8086, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 }, + { 0x1095, 0x3132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3132 }, + { 0x1095, 0x3131, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3131 }, + { 0x1095, 0x3531, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3131 }, + { } /* terminate list */ +}; + +static struct pci_driver sil24_pci_driver = { + .name = DRV_NAME, + .id_table = sil24_pci_tbl, + .probe = sil24_init_one, + .remove = ata_pci_remove_one, /* safe? */ +#ifdef CONFIG_PM + .suspend = ata_pci_device_suspend, + .resume = sil24_pci_device_resume, +#endif +}; + +static struct scsi_host_template sil24_sht = { + .module = THIS_MODULE, + .name = DRV_NAME, + .ioctl = ata_scsi_ioctl, + .queuecommand = ata_scsi_queuecmd, + .change_queue_depth = ata_scsi_change_queue_depth, + .can_queue = SIL24_MAX_CMDS, + .this_id = ATA_SHT_THIS_ID, + .sg_tablesize = LIBATA_MAX_PRD, + .cmd_per_lun = ATA_SHT_CMD_PER_LUN, + .emulated = ATA_SHT_EMULATED, + .use_clustering = ATA_SHT_USE_CLUSTERING, + .proc_name = DRV_NAME, + .dma_boundary = ATA_DMA_BOUNDARY, + .slave_configure = ata_scsi_slave_config, + .slave_destroy = ata_scsi_slave_destroy, + .bios_param = ata_std_bios_param, + .suspend = ata_scsi_device_suspend, + .resume = ata_scsi_device_resume, +}; + +static const struct ata_port_operations sil24_ops = { + .port_disable = ata_port_disable, + + .dev_config = sil24_dev_config, + + .check_status = sil24_check_status, + .check_altstatus = sil24_check_status, + .dev_select = ata_noop_dev_select, + + .tf_read = sil24_tf_read, + + .qc_prep = sil24_qc_prep, + .qc_issue = sil24_qc_issue, + + .irq_handler = sil24_interrupt, + .irq_clear = sil24_irq_clear, + + .scr_read = sil24_scr_read, + .scr_write = sil24_scr_write, + + .freeze = sil24_freeze, + .thaw = sil24_thaw, + .error_handler = sil24_error_handler, + .post_internal_cmd = sil24_post_internal_cmd, + + .port_start = sil24_port_start, + .port_stop = sil24_port_stop, + .host_stop = sil24_host_stop, +}; + +/* + * Use bits 30-31 of port_flags to encode available port numbers. + * Current maxium is 4. + */ +#define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30) +#define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1) + +static struct ata_port_info sil24_port_info[] = { + /* sil_3124 */ + { + .sht = &sil24_sht, + .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) | + SIL24_FLAG_PCIX_IRQ_WOC, + .pio_mask = 0x1f, /* pio0-4 */ + .mwdma_mask = 0x07, /* mwdma0-2 */ + .udma_mask = 0x3f, /* udma0-5 */ + .port_ops = &sil24_ops, + }, + /* sil_3132 */ + { + .sht = &sil24_sht, + .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2), + .pio_mask = 0x1f, /* pio0-4 */ + .mwdma_mask = 0x07, /* mwdma0-2 */ + .udma_mask = 0x3f, /* udma0-5 */ + .port_ops = &sil24_ops, + }, + /* sil_3131/sil_3531 */ + { + .sht = &sil24_sht, + .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1), + .pio_mask = 0x1f, /* pio0-4 */ + .mwdma_mask = 0x07, /* mwdma0-2 */ + .udma_mask = 0x3f, /* udma0-5 */ + .port_ops = &sil24_ops, + }, +}; + +static int sil24_tag(int tag) +{ + if (unlikely(ata_tag_internal(tag))) + return 0; + return tag; +} + +static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev) +{ + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + + if (dev->cdb_len == 16) + writel(PORT_CS_CDB16, port + PORT_CTRL_STAT); + else + writel(PORT_CS_CDB16, port + PORT_CTRL_CLR); +} + +static inline void sil24_update_tf(struct ata_port *ap) +{ + struct sil24_port_priv *pp = ap->private_data; + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + struct sil24_prb __iomem *prb = port; + u8 fis[6 * 4]; + + memcpy_fromio(fis, prb->fis, 6 * 4); + ata_tf_from_fis(fis, &pp->tf); +} + +static u8 sil24_check_status(struct ata_port *ap) +{ + struct sil24_port_priv *pp = ap->private_data; + return pp->tf.command; +} + +static int sil24_scr_map[] = { + [SCR_CONTROL] = 0, + [SCR_STATUS] = 1, + [SCR_ERROR] = 2, + [SCR_ACTIVE] = 3, +}; + +static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg) +{ + void __iomem *scr_addr = (void __iomem *)ap->ioaddr.scr_addr; + if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { + void __iomem *addr; + addr = scr_addr + sil24_scr_map[sc_reg] * 4; + return readl(scr_addr + sil24_scr_map[sc_reg] * 4); + } + return 0xffffffffU; +} + +static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val) +{ + void __iomem *scr_addr = (void __iomem *)ap->ioaddr.scr_addr; + if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { + void __iomem *addr; + addr = scr_addr + sil24_scr_map[sc_reg] * 4; + writel(val, scr_addr + sil24_scr_map[sc_reg] * 4); + } +} + +static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf) +{ + struct sil24_port_priv *pp = ap->private_data; + *tf = pp->tf; +} + +static int sil24_init_port(struct ata_port *ap) +{ + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + u32 tmp; + + writel(PORT_CS_INIT, port + PORT_CTRL_STAT); + ata_wait_register(port + PORT_CTRL_STAT, + PORT_CS_INIT, PORT_CS_INIT, 10, 100); + tmp = ata_wait_register(port + PORT_CTRL_STAT, + PORT_CS_RDY, 0, 10, 100); + + if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) + return -EIO; + return 0; +} + +static int sil24_softreset(struct ata_port *ap, unsigned int *class) +{ + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + struct sil24_port_priv *pp = ap->private_data; + struct sil24_prb *prb = &pp->cmd_block[0].ata.prb; + dma_addr_t paddr = pp->cmd_block_dma; + u32 mask, irq_stat; + const char *reason; + + DPRINTK("ENTER\n"); + + if (ata_port_offline(ap)) { + DPRINTK("PHY reports no device\n"); + *class = ATA_DEV_NONE; + goto out; + } + + /* put the port into known state */ + if (sil24_init_port(ap)) { + reason ="port not ready"; + goto err; + } + + /* do SRST */ + prb->ctrl = cpu_to_le16(PRB_CTRL_SRST); + prb->fis[1] = 0; /* no PM yet */ + + writel((u32)paddr, port + PORT_CMD_ACTIVATE); + writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4); + + mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT; + irq_stat = ata_wait_register(port + PORT_IRQ_STAT, mask, 0x0, + 100, ATA_TMOUT_BOOT / HZ * 1000); + + writel(irq_stat, port + PORT_IRQ_STAT); /* clear IRQs */ + irq_stat >>= PORT_IRQ_RAW_SHIFT; + + if (!(irq_stat & PORT_IRQ_COMPLETE)) { + if (irq_stat & PORT_IRQ_ERROR) + reason = "SRST command error"; + else + reason = "timeout"; + goto err; + } + + sil24_update_tf(ap); + *class = ata_dev_classify(&pp->tf); + + if (*class == ATA_DEV_UNKNOWN) + *class = ATA_DEV_NONE; + + out: + DPRINTK("EXIT, class=%u\n", *class); + return 0; + + err: + ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason); + return -EIO; +} + +static int sil24_hardreset(struct ata_port *ap, unsigned int *class) +{ + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + const char *reason; + int tout_msec, rc; + u32 tmp; + + /* sil24 does the right thing(tm) without any protection */ + sata_set_spd(ap); + + tout_msec = 100; + if (ata_port_online(ap)) + tout_msec = 5000; + + writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT); + tmp = ata_wait_register(port + PORT_CTRL_STAT, + PORT_CS_DEV_RST, PORT_CS_DEV_RST, 10, tout_msec); + + /* SStatus oscillates between zero and valid status after + * DEV_RST, debounce it. + */ + rc = sata_phy_debounce(ap, sata_deb_timing_long); + if (rc) { + reason = "PHY debouncing failed"; + goto err; + } + + if (tmp & PORT_CS_DEV_RST) { + if (ata_port_offline(ap)) + return 0; + reason = "link not ready"; + goto err; + } + + /* Sil24 doesn't store signature FIS after hardreset, so we + * can't wait for BSY to clear. Some devices take a long time + * to get ready and those devices will choke if we don't wait + * for BSY clearance here. Tell libata to perform follow-up + * softreset. + */ + return -EAGAIN; + + err: + ata_port_printk(ap, KERN_ERR, "hardreset failed (%s)\n", reason); + return -EIO; +} + +static inline void sil24_fill_sg(struct ata_queued_cmd *qc, + struct sil24_sge *sge) +{ + struct scatterlist *sg; + unsigned int idx = 0; + + ata_for_each_sg(sg, qc) { + sge->addr = cpu_to_le64(sg_dma_address(sg)); + sge->cnt = cpu_to_le32(sg_dma_len(sg)); + if (ata_sg_is_last(sg, qc)) + sge->flags = cpu_to_le32(SGE_TRM); + else + sge->flags = 0; + + sge++; + idx++; + } +} + +static void sil24_qc_prep(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + struct sil24_port_priv *pp = ap->private_data; + union sil24_cmd_block *cb; + struct sil24_prb *prb; + struct sil24_sge *sge; + u16 ctrl = 0; + + cb = &pp->cmd_block[sil24_tag(qc->tag)]; + + switch (qc->tf.protocol) { + case ATA_PROT_PIO: + case ATA_PROT_DMA: + case ATA_PROT_NCQ: + case ATA_PROT_NODATA: + prb = &cb->ata.prb; + sge = cb->ata.sge; + break; + + case ATA_PROT_ATAPI: + case ATA_PROT_ATAPI_DMA: + case ATA_PROT_ATAPI_NODATA: + prb = &cb->atapi.prb; + sge = cb->atapi.sge; + memset(cb->atapi.cdb, 0, 32); + memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len); + + if (qc->tf.protocol != ATA_PROT_ATAPI_NODATA) { + if (qc->tf.flags & ATA_TFLAG_WRITE) + ctrl = PRB_CTRL_PACKET_WRITE; + else + ctrl = PRB_CTRL_PACKET_READ; + } + break; + + default: + prb = NULL; /* shut up, gcc */ + sge = NULL; + BUG(); + } + + prb->ctrl = cpu_to_le16(ctrl); + ata_tf_to_fis(&qc->tf, prb->fis, 0); + + if (qc->flags & ATA_QCFLAG_DMAMAP) + sil24_fill_sg(qc, sge); +} + +static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + struct sil24_port_priv *pp = ap->private_data; + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + unsigned int tag = sil24_tag(qc->tag); + dma_addr_t paddr; + void __iomem *activate; + + paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block); + activate = port + PORT_CMD_ACTIVATE + tag * 8; + + writel((u32)paddr, activate); + writel((u64)paddr >> 32, activate + 4); + + return 0; +} + +static void sil24_irq_clear(struct ata_port *ap) +{ + /* unused */ +} + +static void sil24_freeze(struct ata_port *ap) +{ + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + + /* Port-wide IRQ mask in HOST_CTRL doesn't really work, clear + * PORT_IRQ_ENABLE instead. + */ + writel(0xffff, port + PORT_IRQ_ENABLE_CLR); +} + +static void sil24_thaw(struct ata_port *ap) +{ + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + u32 tmp; + + /* clear IRQ */ + tmp = readl(port + PORT_IRQ_STAT); + writel(tmp, port + PORT_IRQ_STAT); + + /* turn IRQ back on */ + writel(DEF_PORT_IRQ, port + PORT_IRQ_ENABLE_SET); +} + +static void sil24_error_intr(struct ata_port *ap) +{ + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + struct ata_eh_info *ehi = &ap->eh_info; + int freeze = 0; + u32 irq_stat; + + /* on error, we need to clear IRQ explicitly */ + irq_stat = readl(port + PORT_IRQ_STAT); + writel(irq_stat, port + PORT_IRQ_STAT); + + /* first, analyze and record host port events */ + ata_ehi_clear_desc(ehi); + + ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat); + + if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) { + ata_ehi_hotplugged(ehi); + ata_ehi_push_desc(ehi, ", %s", + irq_stat & PORT_IRQ_PHYRDY_CHG ? + "PHY RDY changed" : "device exchanged"); + freeze = 1; + } + + if (irq_stat & PORT_IRQ_UNK_FIS) { + ehi->err_mask |= AC_ERR_HSM; + ehi->action |= ATA_EH_SOFTRESET; + ata_ehi_push_desc(ehi , ", unknown FIS"); + freeze = 1; + } + + /* deal with command error */ + if (irq_stat & PORT_IRQ_ERROR) { + struct sil24_cerr_info *ci = NULL; + unsigned int err_mask = 0, action = 0; + struct ata_queued_cmd *qc; + u32 cerr; + + /* analyze CMD_ERR */ + cerr = readl(port + PORT_CMD_ERR); + if (cerr < ARRAY_SIZE(sil24_cerr_db)) + ci = &sil24_cerr_db[cerr]; + + if (ci && ci->desc) { + err_mask |= ci->err_mask; + action |= ci->action; + ata_ehi_push_desc(ehi, ", %s", ci->desc); + } else { + err_mask |= AC_ERR_OTHER; + action |= ATA_EH_SOFTRESET; + ata_ehi_push_desc(ehi, ", unknown command error %d", + cerr); + } + + /* record error info */ + qc = ata_qc_from_tag(ap, ap->active_tag); + if (qc) { + sil24_update_tf(ap); + qc->err_mask |= err_mask; + } else + ehi->err_mask |= err_mask; + + ehi->action |= action; + } + + /* freeze or abort */ + if (freeze) + ata_port_freeze(ap); + else + ata_port_abort(ap); +} + +static void sil24_finish_qc(struct ata_queued_cmd *qc) +{ + if (qc->flags & ATA_QCFLAG_RESULT_TF) + sil24_update_tf(qc->ap); +} + +static inline void sil24_host_intr(struct ata_port *ap) +{ + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + u32 slot_stat, qc_active; + int rc; + + slot_stat = readl(port + PORT_SLOT_STAT); + + if (unlikely(slot_stat & HOST_SSTAT_ATTN)) { + sil24_error_intr(ap); + return; + } + + if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) + writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT); + + qc_active = slot_stat & ~HOST_SSTAT_ATTN; + rc = ata_qc_complete_multiple(ap, qc_active, sil24_finish_qc); + if (rc > 0) + return; + if (rc < 0) { + struct ata_eh_info *ehi = &ap->eh_info; + ehi->err_mask |= AC_ERR_HSM; + ehi->action |= ATA_EH_SOFTRESET; + ata_port_freeze(ap); + return; + } + + if (ata_ratelimit()) + ata_port_printk(ap, KERN_INFO, "spurious interrupt " + "(slot_stat 0x%x active_tag %d sactive 0x%x)\n", + slot_stat, ap->active_tag, ap->sactive); +} + +static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs) +{ + struct ata_host *host = dev_instance; + struct sil24_host_priv *hpriv = host->private_data; + unsigned handled = 0; + u32 status; + int i; + + status = readl(hpriv->host_base + HOST_IRQ_STAT); + + if (status == 0xffffffff) { + printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, " + "PCI fault or device removal?\n"); + goto out; + } + + if (!(status & IRQ_STAT_4PORTS)) + goto out; + + spin_lock(&host->lock); + + for (i = 0; i < host->n_ports; i++) + if (status & (1 << i)) { + struct ata_port *ap = host->ports[i]; + if (ap && !(ap->flags & ATA_FLAG_DISABLED)) { + sil24_host_intr(host->ports[i]); + handled++; + } else + printk(KERN_ERR DRV_NAME + ": interrupt from disabled port %d\n", i); + } + + spin_unlock(&host->lock); + out: + return IRQ_RETVAL(handled); +} + +static void sil24_error_handler(struct ata_port *ap) +{ + struct ata_eh_context *ehc = &ap->eh_context; + + if (sil24_init_port(ap)) { + ata_eh_freeze_port(ap); + ehc->i.action |= ATA_EH_HARDRESET; + } + + /* perform recovery */ + ata_do_eh(ap, ata_std_prereset, sil24_softreset, sil24_hardreset, + ata_std_postreset); +} + +static void sil24_post_internal_cmd(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + + if (qc->flags & ATA_QCFLAG_FAILED) + qc->err_mask |= AC_ERR_OTHER; + + /* make DMA engine forget about the failed command */ + if (qc->err_mask) + sil24_init_port(ap); +} + +static inline void sil24_cblk_free(struct sil24_port_priv *pp, struct device *dev) +{ + const size_t cb_size = sizeof(*pp->cmd_block) * SIL24_MAX_CMDS; + + dma_free_coherent(dev, cb_size, pp->cmd_block, pp->cmd_block_dma); +} + +static int sil24_port_start(struct ata_port *ap) +{ + struct device *dev = ap->host->dev; + struct sil24_port_priv *pp; + union sil24_cmd_block *cb; + size_t cb_size = sizeof(*cb) * SIL24_MAX_CMDS; + dma_addr_t cb_dma; + int rc = -ENOMEM; + + pp = kzalloc(sizeof(*pp), GFP_KERNEL); + if (!pp) + goto err_out; + + pp->tf.command = ATA_DRDY; + + cb = dma_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL); + if (!cb) + goto err_out_pp; + memset(cb, 0, cb_size); + + rc = ata_pad_alloc(ap, dev); + if (rc) + goto err_out_pad; + + pp->cmd_block = cb; + pp->cmd_block_dma = cb_dma; + + ap->private_data = pp; + + return 0; + +err_out_pad: + sil24_cblk_free(pp, dev); +err_out_pp: + kfree(pp); +err_out: + return rc; +} + +static void sil24_port_stop(struct ata_port *ap) +{ + struct device *dev = ap->host->dev; + struct sil24_port_priv *pp = ap->private_data; + + sil24_cblk_free(pp, dev); + ata_pad_free(ap, dev); + kfree(pp); +} + +static void sil24_host_stop(struct ata_host *host) +{ + struct sil24_host_priv *hpriv = host->private_data; + struct pci_dev *pdev = to_pci_dev(host->dev); + + pci_iounmap(pdev, hpriv->host_base); + pci_iounmap(pdev, hpriv->port_base); + kfree(hpriv); +} + +static void sil24_init_controller(struct pci_dev *pdev, int n_ports, + unsigned long port_flags, + void __iomem *host_base, + void __iomem *port_base) +{ + u32 tmp; + int i; + + /* GPIO off */ + writel(0, host_base + HOST_FLASH_CMD); + + /* clear global reset & mask interrupts during initialization */ + writel(0, host_base + HOST_CTRL); + + /* init ports */ + for (i = 0; i < n_ports; i++) { + void __iomem *port = port_base + i * PORT_REGS_SIZE; + + /* Initial PHY setting */ + writel(0x20c, port + PORT_PHY_CFG); + + /* Clear port RST */ + tmp = readl(port + PORT_CTRL_STAT); + if (tmp & PORT_CS_PORT_RST) { + writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); + tmp = ata_wait_register(port + PORT_CTRL_STAT, + PORT_CS_PORT_RST, + PORT_CS_PORT_RST, 10, 100); + if (tmp & PORT_CS_PORT_RST) + dev_printk(KERN_ERR, &pdev->dev, + "failed to clear port RST\n"); + } + + /* Configure IRQ WoC */ + if (port_flags & SIL24_FLAG_PCIX_IRQ_WOC) + writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT); + else + writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR); + + /* Zero error counters. */ + writel(0x8000, port + PORT_DECODE_ERR_THRESH); + writel(0x8000, port + PORT_CRC_ERR_THRESH); + writel(0x8000, port + PORT_HSHK_ERR_THRESH); + writel(0x0000, port + PORT_DECODE_ERR_CNT); + writel(0x0000, port + PORT_CRC_ERR_CNT); + writel(0x0000, port + PORT_HSHK_ERR_CNT); + + /* Always use 64bit activation */ + writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR); + + /* Clear port multiplier enable and resume bits */ + writel(PORT_CS_PM_EN | PORT_CS_RESUME, port + PORT_CTRL_CLR); + } + + /* Turn on interrupts */ + writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL); +} + +static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + static int printed_version = 0; + unsigned int board_id = (unsigned int)ent->driver_data; + struct ata_port_info *pinfo = &sil24_port_info[board_id]; + struct ata_probe_ent *probe_ent = NULL; + struct sil24_host_priv *hpriv = NULL; + void __iomem *host_base = NULL; + void __iomem *port_base = NULL; + int i, rc; + u32 tmp; + + if (!printed_version++) + dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); + + rc = pci_enable_device(pdev); + if (rc) + return rc; + + rc = pci_request_regions(pdev, DRV_NAME); + if (rc) + goto out_disable; + + rc = -ENOMEM; + /* map mmio registers */ + host_base = pci_iomap(pdev, 0, 0); + if (!host_base) + goto out_free; + port_base = pci_iomap(pdev, 2, 0); + if (!port_base) + goto out_free; + + /* allocate & init probe_ent and hpriv */ + probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL); + if (!probe_ent) + goto out_free; + + hpriv = kzalloc(sizeof(*hpriv), GFP_KERNEL); + if (!hpriv) + goto out_free; + + probe_ent->dev = pci_dev_to_dev(pdev); + INIT_LIST_HEAD(&probe_ent->node); + + probe_ent->sht = pinfo->sht; + probe_ent->port_flags = pinfo->flags; + probe_ent->pio_mask = pinfo->pio_mask; + probe_ent->mwdma_mask = pinfo->mwdma_mask; + probe_ent->udma_mask = pinfo->udma_mask; + probe_ent->port_ops = pinfo->port_ops; + probe_ent->n_ports = SIL24_FLAG2NPORTS(pinfo->flags); + + probe_ent->irq = pdev->irq; + probe_ent->irq_flags = IRQF_SHARED; + probe_ent->private_data = hpriv; + + hpriv->host_base = host_base; + hpriv->port_base = port_base; + + /* + * Configure the device + */ + if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) { + rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); + if (rc) { + rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); + if (rc) { + dev_printk(KERN_ERR, &pdev->dev, + "64-bit DMA enable failed\n"); + goto out_free; + } + } + } else { + rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); + if (rc) { + dev_printk(KERN_ERR, &pdev->dev, + "32-bit DMA enable failed\n"); + goto out_free; + } + rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); + if (rc) { + dev_printk(KERN_ERR, &pdev->dev, + "32-bit consistent DMA enable failed\n"); + goto out_free; + } + } + + /* Apply workaround for completion IRQ loss on PCI-X errata */ + if (probe_ent->port_flags & SIL24_FLAG_PCIX_IRQ_WOC) { + tmp = readl(host_base + HOST_CTRL); + if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL)) + dev_printk(KERN_INFO, &pdev->dev, + "Applying completion IRQ loss on PCI-X " + "errata fix\n"); + else + probe_ent->port_flags &= ~SIL24_FLAG_PCIX_IRQ_WOC; + } + + for (i = 0; i < probe_ent->n_ports; i++) { + unsigned long portu = + (unsigned long)port_base + i * PORT_REGS_SIZE; + + probe_ent->port[i].cmd_addr = portu; + probe_ent->port[i].scr_addr = portu + PORT_SCONTROL; + + ata_std_ports(&probe_ent->port[i]); + } + + sil24_init_controller(pdev, probe_ent->n_ports, probe_ent->port_flags, + host_base, port_base); + + pci_set_master(pdev); + + /* FIXME: check ata_device_add return value */ + ata_device_add(probe_ent); + + kfree(probe_ent); + return 0; + + out_free: + if (host_base) + pci_iounmap(pdev, host_base); + if (port_base) + pci_iounmap(pdev, port_base); + kfree(probe_ent); + kfree(hpriv); + pci_release_regions(pdev); + out_disable: + pci_disable_device(pdev); + return rc; +} + +#ifdef CONFIG_PM +static int sil24_pci_device_resume(struct pci_dev *pdev) +{ + struct ata_host *host = dev_get_drvdata(&pdev->dev); + struct sil24_host_priv *hpriv = host->private_data; + + ata_pci_device_do_resume(pdev); + + if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) + writel(HOST_CTRL_GLOBAL_RST, hpriv->host_base + HOST_CTRL); + + sil24_init_controller(pdev, host->n_ports, host->ports[0]->flags, + hpriv->host_base, hpriv->port_base); + + ata_host_resume(host); + + return 0; +} +#endif + +static int __init sil24_init(void) +{ + return pci_register_driver(&sil24_pci_driver); +} + +static void __exit sil24_exit(void) +{ + pci_unregister_driver(&sil24_pci_driver); +} + +MODULE_AUTHOR("Tejun Heo"); +MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(pci, sil24_pci_tbl); + +module_init(sil24_init); +module_exit(sil24_exit); |