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linux-next/drivers/ata/sata_sil24.c
Tejun Heo e8b3b5e9f5 sata_sil24: configure max read request size to 4k 
Due to request posting limitations, bandwidth of sil3132 is limited to
around 120MB/s with the minimum pci-e payload size (128bytes) which is
used by most consumer systems.  However, write throughput can be
slightly (~3%) increased by increasing the max read requeset size.
Configure it to 4k which is the maximum supported.  This optimization
is also done by SIMG's windows driver.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-10-27 23:55:27 -04:00

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/*
* 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>
#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;
};
/*
* Port multiplier
*/
struct sil24_port_multiplier {
__le32 diag;
__le32 sactive;
};
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_NO_LEGACY |
ATA_FLAG_MMIO | 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 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 directon 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 directon 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 void 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
static int sil24_pci_device_resume(struct pci_dev *pdev);
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
.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,
};
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
};
/*
* 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 = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = ATA_UDMA5, /* udma0-5 */
.port_ops = &sil24_ops,
},
/* sil_3132 */
{
.flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2),
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = ATA_UDMA5, /* udma0-5 */
.port_ops = &sil24_ops,
},
/* sil_3131/sil_3531 */
{
.flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1),
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = ATA_UDMA5, /* udma0-5 */
.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)) {
void __iomem *addr;
addr = scr_addr + sil24_scr_map[sc_reg] * 4;
*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)) {
void __iomem *addr;
addr = scr_addr + sil24_scr_map[sc_reg] * 4;
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. */
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_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(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) {
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);
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(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_printk(link, KERN_ERR, "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_printk(ap, KERN_WARNING, "controller in dubious "
"state, performing PORT_RST\n");
writel(PORT_CS_PORT_RST, port + PORT_CTRL_STAT);
msleep(10);
writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
ata_wait_register(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(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_printk(link, 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;
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 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)];
if (!ata_is_atapi(qc->tf.protocol)) {
prb = &cb->ata.prb;
sge = cb->ata.sge;
} else {
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 (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);
}
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->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 bool sil24_qc_fill_rtf(struct ata_queued_cmd *qc)
{
sil24_read_tf(qc->ap, qc->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_printk(ap, KERN_INFO,
"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_printk(link, KERN_ERR,
"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) {
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_printk(ap, KERN_INFO, "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) {
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(ap);
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 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;
memset(cb, 0, cb_size);
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(port + PORT_CTRL_STAT,
PORT_CS_PORT_RST,
PORT_CS_PORT_RST, 10, 100);
if (tmp & PORT_CS_PORT_RST)
dev_printk(KERN_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;
static int printed_version;
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;
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
/* 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_printk(KERN_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 */
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");
return rc;
}
}
} else {
rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
if (rc) {
dev_printk(KERN_ERR, &pdev->dev,
"32-bit DMA enable failed\n");
return rc;
}
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");
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);
pci_set_master(pdev);
return ata_host_activate(host, pdev->irq, sil24_interrupt, IRQF_SHARED,
&sil24_sht);
}
#ifdef CONFIG_PM
static int sil24_pci_device_resume(struct pci_dev *pdev)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
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;
}
static int sil24_port_resume(struct ata_port *ap)
{
sil24_config_pmp(ap, ap->nr_pmp_links);
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);
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