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Diffstat (limited to '')
| -rw-r--r-- | drivers/ata/sata_sil24.c | 1364 |
1 files changed, 1364 insertions, 0 deletions
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c new file mode 100644 index 000000000..560070d4f --- /dev/null +++ b/drivers/ata/sata_sil24.c @@ -0,0 +1,1364 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers + * + * Copyright 2005 Tejun Heo + * + * Based on preview driver from Silicon Image. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/gfp.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> + +#define DRV_NAME "sata_sil24" +#define DRV_VERSION "1.1" + +/* + * 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; +}; + + +enum { + SIL24_HOST_BAR = 0, + SIL24_PORT_BAR = 2, + + /* sil24 fetches in chunks of 64bytes. The first block + * contains the PRB and two SGEs. From the second block, it's + * consisted of four SGEs and called SGT. Calculate the + * number of SGTs that fit into one page. + */ + SIL24_PRB_SZ = sizeof(struct sil24_prb) + + 2 * sizeof(struct sil24_sge), + SIL24_MAX_SGT = (PAGE_SIZE - SIL24_PRB_SZ) + / (4 * sizeof(struct sil24_sge)), + + /* This will give us one unused SGEs for ATA. This extra SGE + * will be used to store CDB for ATAPI devices. + */ + SIL24_MAX_SGE = 4 * SIL24_MAX_SGT + 1, + + /* + * 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 PMP regs */ + PORT_LRAM_SLOT_SZ = 0x0080, /* 32 bytes PRB + 2 SGE, ACT... */ + + PORT_PMP = 0x0f80, /* 8 bytes PMP * 16 (128 bytes) */ + PORT_PMP_STATUS = 0x0000, /* port device status offset */ + PORT_PMP_QACTIVE = 0x0004, /* port device QActive offset */ + PORT_PMP_SIZE = 0x0008, /* 8 bytes per PMP */ + + /* 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_CONTEXT = 0x1e04, + 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_PMP_RESUME = (1 << 6), /* PMP resume */ + PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */ + PORT_CS_PMP_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 | PORT_IRQ_SDB_NOTIFY, + + /* 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_PIO_DMA | + ATA_FLAG_NCQ | ATA_FLAG_ACPI_SATA | + ATA_FLAG_AN | ATA_FLAG_PMP, + 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[SIL24_MAX_SGE]; +}; + +struct sil24_atapi_block { + struct sil24_prb prb; + u8 cdb[16]; + struct sil24_sge sge[SIL24_MAX_SGE]; +}; + +union sil24_cmd_block { + struct sil24_ata_block ata; + struct sil24_atapi_block atapi; +}; + +static const struct sil24_cerr_info { + unsigned int err_mask, action; + const char *desc; +} sil24_cerr_db[] = { + [0] = { AC_ERR_DEV, 0, + "device error" }, + [PORT_CERR_DEV] = { AC_ERR_DEV, 0, + "device error via D2H FIS" }, + [PORT_CERR_SDB] = { AC_ERR_DEV, 0, + "device error via SDB FIS" }, + [PORT_CERR_DATA] = { AC_ERR_ATA_BUS, ATA_EH_RESET, + "error in data FIS" }, + [PORT_CERR_SEND] = { AC_ERR_ATA_BUS, ATA_EH_RESET, + "failed to transmit command FIS" }, + [PORT_CERR_INCONSISTENT] = { AC_ERR_HSM, ATA_EH_RESET, + "protocol mismatch" }, + [PORT_CERR_DIRECTION] = { AC_ERR_HSM, ATA_EH_RESET, + "data direction mismatch" }, + [PORT_CERR_UNDERRUN] = { AC_ERR_HSM, ATA_EH_RESET, + "ran out of SGEs while writing" }, + [PORT_CERR_OVERRUN] = { AC_ERR_HSM, ATA_EH_RESET, + "ran out of SGEs while reading" }, + [PORT_CERR_PKT_PROT] = { AC_ERR_HSM, ATA_EH_RESET, + "invalid data direction for ATAPI CDB" }, + [PORT_CERR_SGT_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_RESET, + "SGT not on qword boundary" }, + [PORT_CERR_SGT_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, + "PCI target abort while fetching SGT" }, + [PORT_CERR_SGT_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, + "PCI master abort while fetching SGT" }, + [PORT_CERR_SGT_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET, + "PCI parity error while fetching SGT" }, + [PORT_CERR_CMD_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_RESET, + "PRB not on qword boundary" }, + [PORT_CERR_CMD_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, + "PCI target abort while fetching PRB" }, + [PORT_CERR_CMD_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, + "PCI master abort while fetching PRB" }, + [PORT_CERR_CMD_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET, + "PCI parity error while fetching PRB" }, + [PORT_CERR_XFR_UNDEF] = { AC_ERR_HOST_BUS, ATA_EH_RESET, + "undefined error while transferring data" }, + [PORT_CERR_XFR_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, + "PCI target abort while transferring data" }, + [PORT_CERR_XFR_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_RESET, + "PCI master abort while transferring data" }, + [PORT_CERR_XFR_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_RESET, + "PCI parity error while transferring data" }, + [PORT_CERR_SENDSERVICE] = { AC_ERR_HSM, ATA_EH_RESET, + "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 */ + int do_port_rst; +}; + +static void sil24_dev_config(struct ata_device *dev); +static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val); +static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val); +static int sil24_qc_defer(struct ata_queued_cmd *qc); +static enum ata_completion_errors sil24_qc_prep(struct ata_queued_cmd *qc); +static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc); +static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc); +static void sil24_pmp_attach(struct ata_port *ap); +static void sil24_pmp_detach(struct ata_port *ap); +static void sil24_freeze(struct ata_port *ap); +static void sil24_thaw(struct ata_port *ap); +static int sil24_softreset(struct ata_link *link, unsigned int *class, + unsigned long deadline); +static int sil24_hardreset(struct ata_link *link, unsigned int *class, + unsigned long deadline); +static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class, + unsigned long deadline); +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 int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); +#ifdef CONFIG_PM_SLEEP +static int sil24_pci_device_resume(struct pci_dev *pdev); +#endif +#ifdef CONFIG_PM +static int sil24_port_resume(struct ata_port *ap); +#endif + +static const struct pci_device_id sil24_pci_tbl[] = { + { PCI_VDEVICE(CMD, 0x3124), BID_SIL3124 }, + { PCI_VDEVICE(INTEL, 0x3124), BID_SIL3124 }, + { PCI_VDEVICE(CMD, 0x3132), BID_SIL3132 }, + { PCI_VDEVICE(CMD, 0x0242), BID_SIL3132 }, + { PCI_VDEVICE(CMD, 0x0244), BID_SIL3132 }, + { PCI_VDEVICE(CMD, 0x3131), BID_SIL3131 }, + { PCI_VDEVICE(CMD, 0x3531), 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, +#ifdef CONFIG_PM_SLEEP + .suspend = ata_pci_device_suspend, + .resume = sil24_pci_device_resume, +#endif +}; + +static struct scsi_host_template sil24_sht = { + ATA_NCQ_SHT(DRV_NAME), + .can_queue = SIL24_MAX_CMDS, + .sg_tablesize = SIL24_MAX_SGE, + .dma_boundary = ATA_DMA_BOUNDARY, + .tag_alloc_policy = BLK_TAG_ALLOC_FIFO, +}; + +static struct ata_port_operations sil24_ops = { + .inherits = &sata_pmp_port_ops, + + .qc_defer = sil24_qc_defer, + .qc_prep = sil24_qc_prep, + .qc_issue = sil24_qc_issue, + .qc_fill_rtf = sil24_qc_fill_rtf, + + .freeze = sil24_freeze, + .thaw = sil24_thaw, + .softreset = sil24_softreset, + .hardreset = sil24_hardreset, + .pmp_softreset = sil24_softreset, + .pmp_hardreset = sil24_pmp_hardreset, + .error_handler = sil24_error_handler, + .post_internal_cmd = sil24_post_internal_cmd, + .dev_config = sil24_dev_config, + + .scr_read = sil24_scr_read, + .scr_write = sil24_scr_write, + .pmp_attach = sil24_pmp_attach, + .pmp_detach = sil24_pmp_detach, + + .port_start = sil24_port_start, +#ifdef CONFIG_PM + .port_resume = sil24_port_resume, +#endif +}; + +static bool sata_sil24_msi; /* Disable MSI */ +module_param_named(msi, sata_sil24_msi, bool, S_IRUGO); +MODULE_PARM_DESC(msi, "Enable MSI (Default: false)"); + +/* + * 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 const struct ata_port_info sil24_port_info[] = { + /* sil_3124 */ + { + .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) | + SIL24_FLAG_PCIX_IRQ_WOC, + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA5, + .port_ops = &sil24_ops, + }, + /* sil_3132 */ + { + .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2), + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA5, + .port_ops = &sil24_ops, + }, + /* sil_3131/sil_3531 */ + { + .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1), + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA5, + .port_ops = &sil24_ops, + }, +}; + +static int sil24_tag(int tag) +{ + if (unlikely(ata_tag_internal(tag))) + return 0; + return tag; +} + +static unsigned long sil24_port_offset(struct ata_port *ap) +{ + return ap->port_no * PORT_REGS_SIZE; +} + +static void __iomem *sil24_port_base(struct ata_port *ap) +{ + return ap->host->iomap[SIL24_PORT_BAR] + sil24_port_offset(ap); +} + +static void sil24_dev_config(struct ata_device *dev) +{ + void __iomem *port = sil24_port_base(dev->link->ap); + + if (dev->cdb_len == 16) + writel(PORT_CS_CDB16, port + PORT_CTRL_STAT); + else + writel(PORT_CS_CDB16, port + PORT_CTRL_CLR); +} + +static void sil24_read_tf(struct ata_port *ap, int tag, struct ata_taskfile *tf) +{ + void __iomem *port = sil24_port_base(ap); + struct sil24_prb __iomem *prb; + u8 fis[6 * 4]; + + prb = port + PORT_LRAM + sil24_tag(tag) * PORT_LRAM_SLOT_SZ; + memcpy_fromio(fis, prb->fis, sizeof(fis)); + ata_tf_from_fis(fis, tf); +} + +static int sil24_scr_map[] = { + [SCR_CONTROL] = 0, + [SCR_STATUS] = 1, + [SCR_ERROR] = 2, + [SCR_ACTIVE] = 3, +}; + +static int sil24_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val) +{ + void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL; + + if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { + *val = readl(scr_addr + sil24_scr_map[sc_reg] * 4); + return 0; + } + return -EINVAL; +} + +static int sil24_scr_write(struct ata_link *link, unsigned sc_reg, u32 val) +{ + void __iomem *scr_addr = sil24_port_base(link->ap) + PORT_SCONTROL; + + if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { + writel(val, scr_addr + sil24_scr_map[sc_reg] * 4); + return 0; + } + return -EINVAL; +} + +static void sil24_config_port(struct ata_port *ap) +{ + void __iomem *port = sil24_port_base(ap); + + /* configure IRQ WoC */ + if (ap->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. */ + writew(0x8000, port + PORT_DECODE_ERR_THRESH); + writew(0x8000, port + PORT_CRC_ERR_THRESH); + writew(0x8000, port + PORT_HSHK_ERR_THRESH); + writew(0x0000, port + PORT_DECODE_ERR_CNT); + writew(0x0000, port + PORT_CRC_ERR_CNT); + writew(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_PMP_EN | PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR); +} + +static void sil24_config_pmp(struct ata_port *ap, int attached) +{ + void __iomem *port = sil24_port_base(ap); + + if (attached) + writel(PORT_CS_PMP_EN, port + PORT_CTRL_STAT); + else + writel(PORT_CS_PMP_EN, port + PORT_CTRL_CLR); +} + +static void sil24_clear_pmp(struct ata_port *ap) +{ + void __iomem *port = sil24_port_base(ap); + int i; + + writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR); + + for (i = 0; i < SATA_PMP_MAX_PORTS; i++) { + void __iomem *pmp_base = port + PORT_PMP + i * PORT_PMP_SIZE; + + writel(0, pmp_base + PORT_PMP_STATUS); + writel(0, pmp_base + PORT_PMP_QACTIVE); + } +} + +static int sil24_init_port(struct ata_port *ap) +{ + void __iomem *port = sil24_port_base(ap); + struct sil24_port_priv *pp = ap->private_data; + u32 tmp; + + /* clear PMP error status */ + if (sata_pmp_attached(ap)) + sil24_clear_pmp(ap); + + writel(PORT_CS_INIT, port + PORT_CTRL_STAT); + ata_wait_register(ap, port + PORT_CTRL_STAT, + PORT_CS_INIT, PORT_CS_INIT, 10, 100); + tmp = ata_wait_register(ap, port + PORT_CTRL_STAT, + PORT_CS_RDY, 0, 10, 100); + + if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) { + pp->do_port_rst = 1; + ap->link.eh_context.i.action |= ATA_EH_RESET; + return -EIO; + } + + return 0; +} + +static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp, + const struct ata_taskfile *tf, + int is_cmd, u32 ctrl, + unsigned long timeout_msec) +{ + void __iomem *port = sil24_port_base(ap); + 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 irq_enabled, irq_mask, irq_stat; + int rc; + + prb->ctrl = cpu_to_le16(ctrl); + ata_tf_to_fis(tf, pmp, is_cmd, prb->fis); + + /* temporarily plug completion and error interrupts */ + irq_enabled = readl(port + PORT_IRQ_ENABLE_SET); + writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR); + + /* + * The barrier is required to ensure that writes to cmd_block reach + * the memory before the write to PORT_CMD_ACTIVATE. + */ + wmb(); + writel((u32)paddr, port + PORT_CMD_ACTIVATE); + writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4); + + irq_mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT; + irq_stat = ata_wait_register(ap, port + PORT_IRQ_STAT, irq_mask, 0x0, + 10, timeout_msec); + + writel(irq_mask, port + PORT_IRQ_STAT); /* clear IRQs */ + irq_stat >>= PORT_IRQ_RAW_SHIFT; + + if (irq_stat & PORT_IRQ_COMPLETE) + rc = 0; + else { + /* force port into known state */ + sil24_init_port(ap); + + if (irq_stat & PORT_IRQ_ERROR) + rc = -EIO; + else + rc = -EBUSY; + } + + /* restore IRQ enabled */ + writel(irq_enabled, port + PORT_IRQ_ENABLE_SET); + + return rc; +} + +static int sil24_softreset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + struct ata_port *ap = link->ap; + int pmp = sata_srst_pmp(link); + unsigned long timeout_msec = 0; + struct ata_taskfile tf; + const char *reason; + int rc; + + DPRINTK("ENTER\n"); + + /* put the port into known state */ + if (sil24_init_port(ap)) { + reason = "port not ready"; + goto err; + } + + /* do SRST */ + if (time_after(deadline, jiffies)) + timeout_msec = jiffies_to_msecs(deadline - jiffies); + + ata_tf_init(link->device, &tf); /* doesn't really matter */ + rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST, + timeout_msec); + if (rc == -EBUSY) { + reason = "timeout"; + goto err; + } else if (rc) { + reason = "SRST command error"; + goto err; + } + + sil24_read_tf(ap, 0, &tf); + *class = ata_dev_classify(&tf); + + DPRINTK("EXIT, class=%u\n", *class); + return 0; + + err: + ata_link_err(link, "softreset failed (%s)\n", reason); + return -EIO; +} + +static int sil24_hardreset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + struct ata_port *ap = link->ap; + void __iomem *port = sil24_port_base(ap); + struct sil24_port_priv *pp = ap->private_data; + int did_port_rst = 0; + const char *reason; + int tout_msec, rc; + u32 tmp; + + retry: + /* Sometimes, DEV_RST is not enough to recover the controller. + * This happens often after PM DMA CS errata. + */ + if (pp->do_port_rst) { + ata_port_warn(ap, + "controller in dubious state, performing PORT_RST\n"); + + writel(PORT_CS_PORT_RST, port + PORT_CTRL_STAT); + ata_msleep(ap, 10); + writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); + ata_wait_register(ap, port + PORT_CTRL_STAT, PORT_CS_RDY, 0, + 10, 5000); + + /* restore port configuration */ + sil24_config_port(ap); + sil24_config_pmp(ap, ap->nr_pmp_links); + + pp->do_port_rst = 0; + did_port_rst = 1; + } + + /* sil24 does the right thing(tm) without any protection */ + sata_set_spd(link); + + tout_msec = 100; + if (ata_link_online(link)) + tout_msec = 5000; + + writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT); + tmp = ata_wait_register(ap, 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_link_debounce(link, sata_deb_timing_long, deadline); + if (rc) { + reason = "PHY debouncing failed"; + goto err; + } + + if (tmp & PORT_CS_DEV_RST) { + if (ata_link_offline(link)) + 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: + if (!did_port_rst) { + pp->do_port_rst = 1; + goto retry; + } + + ata_link_err(link, "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; + struct sil24_sge *last_sge = NULL; + unsigned int si; + + for_each_sg(qc->sg, sg, qc->n_elem, si) { + sge->addr = cpu_to_le64(sg_dma_address(sg)); + sge->cnt = cpu_to_le32(sg_dma_len(sg)); + sge->flags = 0; + + last_sge = sge; + sge++; + } + + last_sge->flags = cpu_to_le32(SGE_TRM); +} + +static int sil24_qc_defer(struct ata_queued_cmd *qc) +{ + struct ata_link *link = qc->dev->link; + struct ata_port *ap = link->ap; + u8 prot = qc->tf.protocol; + + /* + * There is a bug in the chip: + * Port LRAM Causes the PRB/SGT Data to be Corrupted + * If the host issues a read request for LRAM and SActive registers + * while active commands are available in the port, PRB/SGT data in + * the LRAM can become corrupted. This issue applies only when + * reading from, but not writing to, the LRAM. + * + * Therefore, reading LRAM when there is no particular error [and + * other commands may be outstanding] is prohibited. + * + * To avoid this bug there are two situations where a command must run + * exclusive of any other commands on the port: + * + * - ATAPI commands which check the sense data + * - Passthrough ATA commands which always have ATA_QCFLAG_RESULT_TF + * set. + * + */ + int is_excl = (ata_is_atapi(prot) || + (qc->flags & ATA_QCFLAG_RESULT_TF)); + + if (unlikely(ap->excl_link)) { + if (link == ap->excl_link) { + if (ap->nr_active_links) + return ATA_DEFER_PORT; + qc->flags |= ATA_QCFLAG_CLEAR_EXCL; + } else + return ATA_DEFER_PORT; + } else if (unlikely(is_excl)) { + ap->excl_link = link; + if (ap->nr_active_links) + return ATA_DEFER_PORT; + qc->flags |= ATA_QCFLAG_CLEAR_EXCL; + } + + return ata_std_qc_defer(qc); +} + +static enum ata_completion_errors 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->hw_tag)]; + + if (!ata_is_atapi(qc->tf.protocol)) { + prb = &cb->ata.prb; + sge = cb->ata.sge; + if (ata_is_data(qc->tf.protocol)) { + u16 prot = 0; + ctrl = PRB_CTRL_PROTOCOL; + if (ata_is_ncq(qc->tf.protocol)) + prot |= PRB_PROT_NCQ; + if (qc->tf.flags & ATA_TFLAG_WRITE) + prot |= PRB_PROT_WRITE; + else + prot |= PRB_PROT_READ; + prb->prot = cpu_to_le16(prot); + } + } else { + prb = &cb->atapi.prb; + sge = cb->atapi.sge; + memset(cb->atapi.cdb, 0, sizeof(cb->atapi.cdb)); + memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len); + + if (ata_is_data(qc->tf.protocol)) { + if (qc->tf.flags & ATA_TFLAG_WRITE) + ctrl = PRB_CTRL_PACKET_WRITE; + else + ctrl = PRB_CTRL_PACKET_READ; + } + } + + prb->ctrl = cpu_to_le16(ctrl); + ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, prb->fis); + + if (qc->flags & ATA_QCFLAG_DMAMAP) + sil24_fill_sg(qc, sge); + + return AC_ERR_OK; +} + +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 = sil24_port_base(ap); + unsigned int tag = sil24_tag(qc->hw_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; + + /* + * The barrier is required to ensure that writes to cmd_block reach + * the memory before the write to PORT_CMD_ACTIVATE. + */ + wmb(); + writel((u32)paddr, activate); + writel((u64)paddr >> 32, activate + 4); + + return 0; +} + +static bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc) +{ + sil24_read_tf(qc->ap, qc->hw_tag, &qc->result_tf); + return true; +} + +static void sil24_pmp_attach(struct ata_port *ap) +{ + u32 *gscr = ap->link.device->gscr; + + sil24_config_pmp(ap, 1); + sil24_init_port(ap); + + if (sata_pmp_gscr_vendor(gscr) == 0x11ab && + sata_pmp_gscr_devid(gscr) == 0x4140) { + ata_port_info(ap, + "disabling NCQ support due to sil24-mv4140 quirk\n"); + ap->flags &= ~ATA_FLAG_NCQ; + } +} + +static void sil24_pmp_detach(struct ata_port *ap) +{ + sil24_init_port(ap); + sil24_config_pmp(ap, 0); + + ap->flags |= ATA_FLAG_NCQ; +} + +static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + int rc; + + rc = sil24_init_port(link->ap); + if (rc) { + ata_link_err(link, "hardreset failed (port not ready)\n"); + return rc; + } + + return sata_std_hardreset(link, class, deadline); +} + +static void sil24_freeze(struct ata_port *ap) +{ + void __iomem *port = sil24_port_base(ap); + + /* 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 = sil24_port_base(ap); + 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 = sil24_port_base(ap); + struct sil24_port_priv *pp = ap->private_data; + struct ata_queued_cmd *qc = NULL; + struct ata_link *link; + struct ata_eh_info *ehi; + int abort = 0, 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 */ + link = &ap->link; + ehi = &link->eh_info; + ata_ehi_clear_desc(ehi); + + ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat); + + if (irq_stat & PORT_IRQ_SDB_NOTIFY) { + ata_ehi_push_desc(ehi, "SDB notify"); + sata_async_notification(ap); + } + + 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_RESET; + ata_ehi_push_desc(ehi, "unknown FIS"); + freeze = 1; + } + + /* deal with command error */ + if (irq_stat & PORT_IRQ_ERROR) { + const struct sil24_cerr_info *ci = NULL; + unsigned int err_mask = 0, action = 0; + u32 context, cerr; + int pmp; + + abort = 1; + + /* DMA Context Switch Failure in Port Multiplier Mode + * errata. If we have active commands to 3 or more + * devices, any error condition on active devices can + * corrupt DMA context switching. + */ + if (ap->nr_active_links >= 3) { + ehi->err_mask |= AC_ERR_OTHER; + ehi->action |= ATA_EH_RESET; + ata_ehi_push_desc(ehi, "PMP DMA CS errata"); + pp->do_port_rst = 1; + freeze = 1; + } + + /* find out the offending link and qc */ + if (sata_pmp_attached(ap)) { + context = readl(port + PORT_CONTEXT); + pmp = (context >> 5) & 0xf; + + if (pmp < ap->nr_pmp_links) { + link = &ap->pmp_link[pmp]; + ehi = &link->eh_info; + qc = ata_qc_from_tag(ap, link->active_tag); + + ata_ehi_clear_desc(ehi); + ata_ehi_push_desc(ehi, "irq_stat 0x%08x", + irq_stat); + } else { + err_mask |= AC_ERR_HSM; + action |= ATA_EH_RESET; + freeze = 1; + } + } else + qc = ata_qc_from_tag(ap, link->active_tag); + + /* 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; + if (action & ATA_EH_RESET) + freeze = 1; + ata_ehi_push_desc(ehi, "%s", ci->desc); + } else { + err_mask |= AC_ERR_OTHER; + action |= ATA_EH_RESET; + freeze = 1; + ata_ehi_push_desc(ehi, "unknown command error %d", + cerr); + } + + /* record error info */ + if (qc) + qc->err_mask |= err_mask; + else + ehi->err_mask |= err_mask; + + ehi->action |= action; + + /* if PMP, resume */ + if (sata_pmp_attached(ap)) + writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_STAT); + } + + /* freeze or abort */ + if (freeze) + ata_port_freeze(ap); + else if (abort) { + if (qc) + ata_link_abort(qc->dev->link); + else + ata_port_abort(ap); + } +} + +static inline void sil24_host_intr(struct ata_port *ap) +{ + void __iomem *port = sil24_port_base(ap); + u32 slot_stat, qc_active; + int rc; + + /* If PCIX_IRQ_WOC, there's an inherent race window between + * clearing IRQ pending status and reading PORT_SLOT_STAT + * which may cause spurious interrupts afterwards. This is + * unavoidable and much better than losing interrupts which + * happens if IRQ pending is cleared after reading + * PORT_SLOT_STAT. + */ + if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) + writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT); + + slot_stat = readl(port + PORT_SLOT_STAT); + + if (unlikely(slot_stat & HOST_SSTAT_ATTN)) { + sil24_error_intr(ap); + return; + } + + qc_active = slot_stat & ~HOST_SSTAT_ATTN; + rc = ata_qc_complete_multiple(ap, qc_active); + if (rc > 0) + return; + if (rc < 0) { + struct ata_eh_info *ehi = &ap->link.eh_info; + ehi->err_mask |= AC_ERR_HSM; + ehi->action |= ATA_EH_RESET; + ata_port_freeze(ap); + return; + } + + /* spurious interrupts are expected if PCIX_IRQ_WOC */ + if (!(ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) && ata_ratelimit()) + ata_port_info(ap, + "spurious interrupt (slot_stat 0x%x active_tag %d sactive 0x%x)\n", + slot_stat, ap->link.active_tag, ap->link.sactive); +} + +static irqreturn_t sil24_interrupt(int irq, void *dev_instance) +{ + struct ata_host *host = dev_instance; + void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; + unsigned handled = 0; + u32 status; + int i; + + status = readl(host_base + HOST_IRQ_STAT); + + if (status == 0xffffffff) { + dev_err(host->dev, "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)) { + sil24_host_intr(host->ports[i]); + handled++; + } + + spin_unlock(&host->lock); + out: + return IRQ_RETVAL(handled); +} + +static void sil24_error_handler(struct ata_port *ap) +{ + struct sil24_port_priv *pp = ap->private_data; + + if (sil24_init_port(ap)) + ata_eh_freeze_port(ap); + + sata_pmp_error_handler(ap); + + pp->do_port_rst = 0; +} + +static void sil24_post_internal_cmd(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + + /* make DMA engine forget about the failed command */ + if ((qc->flags & ATA_QCFLAG_FAILED) && sil24_init_port(ap)) + ata_eh_freeze_port(ap); +} + +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; + + pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); + if (!pp) + return -ENOMEM; + + cb = dmam_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL); + if (!cb) + return -ENOMEM; + + pp->cmd_block = cb; + pp->cmd_block_dma = cb_dma; + + ap->private_data = pp; + + ata_port_pbar_desc(ap, SIL24_HOST_BAR, -1, "host"); + ata_port_pbar_desc(ap, SIL24_PORT_BAR, sil24_port_offset(ap), "port"); + + return 0; +} + +static void sil24_init_controller(struct ata_host *host) +{ + void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; + 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 < host->n_ports; i++) { + struct ata_port *ap = host->ports[i]; + void __iomem *port = sil24_port_base(ap); + + + /* 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(NULL, port + PORT_CTRL_STAT, + PORT_CS_PORT_RST, + PORT_CS_PORT_RST, 10, 100); + if (tmp & PORT_CS_PORT_RST) + dev_err(host->dev, + "failed to clear port RST\n"); + } + + /* configure port */ + sil24_config_port(ap); + } + + /* 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) +{ + extern int __MARKER__sil24_cmd_block_is_sized_wrongly; + struct ata_port_info pi = sil24_port_info[ent->driver_data]; + const struct ata_port_info *ppi[] = { &pi, NULL }; + void __iomem * const *iomap; + struct ata_host *host; + int rc; + u32 tmp; + + /* cause link error if sil24_cmd_block is sized wrongly */ + if (sizeof(union sil24_cmd_block) != PAGE_SIZE) + __MARKER__sil24_cmd_block_is_sized_wrongly = 1; + + ata_print_version_once(&pdev->dev, DRV_VERSION); + + /* acquire resources */ + rc = pcim_enable_device(pdev); + if (rc) + return rc; + + rc = pcim_iomap_regions(pdev, + (1 << SIL24_HOST_BAR) | (1 << SIL24_PORT_BAR), + DRV_NAME); + if (rc) + return rc; + iomap = pcim_iomap_table(pdev); + + /* apply workaround for completion IRQ loss on PCI-X errata */ + if (pi.flags & SIL24_FLAG_PCIX_IRQ_WOC) { + tmp = readl(iomap[SIL24_HOST_BAR] + HOST_CTRL); + if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL)) + dev_info(&pdev->dev, + "Applying completion IRQ loss on PCI-X errata fix\n"); + else + pi.flags &= ~SIL24_FLAG_PCIX_IRQ_WOC; + } + + /* allocate and fill host */ + host = ata_host_alloc_pinfo(&pdev->dev, ppi, + SIL24_FLAG2NPORTS(ppi[0]->flags)); + if (!host) + return -ENOMEM; + host->iomap = iomap; + + /* configure and activate the device */ + rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); + if (rc) { + dev_err(&pdev->dev, "DMA enable failed\n"); + return rc; + } + + /* Set max read request size to 4096. This slightly increases + * write throughput for pci-e variants. + */ + pcie_set_readrq(pdev, 4096); + + sil24_init_controller(host); + + if (sata_sil24_msi && !pci_enable_msi(pdev)) { + dev_info(&pdev->dev, "Using MSI\n"); + pci_intx(pdev, 0); + } + + pci_set_master(pdev); + return ata_host_activate(host, pdev->irq, sil24_interrupt, IRQF_SHARED, + &sil24_sht); +} + +#ifdef CONFIG_PM_SLEEP +static int sil24_pci_device_resume(struct pci_dev *pdev) +{ + struct ata_host *host = pci_get_drvdata(pdev); + void __iomem *host_base = host->iomap[SIL24_HOST_BAR]; + int rc; + + rc = ata_pci_device_do_resume(pdev); + if (rc) + return rc; + + if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) + writel(HOST_CTRL_GLOBAL_RST, host_base + HOST_CTRL); + + sil24_init_controller(host); + + ata_host_resume(host); + + return 0; +} +#endif + +#ifdef CONFIG_PM +static int sil24_port_resume(struct ata_port *ap) +{ + sil24_config_pmp(ap, ap->nr_pmp_links); + return 0; +} +#endif + +module_pci_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); |