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android_kernel_xiaomi_sm8350/drivers/ata/sata_sil24.c
James Bottomley dde2020754 libata: eliminate the home grown dma padding in favour of 
that provided by the block layer

ATA requires that all DMA transfers begin and end on word boundaries.
Because of this, a large amount of machinery grew up in ide to adjust
scatterlists on this basis.  However, as of 2.5, the block layer has a
dma_alignment variable which ensures both the beginning and length of a
DMA transfer are aligned on the dma_alignment boundary.  Although the
block layer does adjust the beginning of the transfer to ensure this
happens, it doesn't actually adjust the length, it merely makes sure
that space is allocated for transfers beyond the declared length.  The
upshot of this is that scatterlists may be padded to any size between
the actual length and the length adjusted to the dma_alignment safely
knowing that memory is allocated in this region.

Right at the moment, SCSI takes the default dma_aligment which is on a
512 byte boundary.  Note that this aligment only applies to transfers
coming in from user space.  However, since all kernel allocations are
automatically aligned on a minimum of 32 byte boundaries, it is safe to
adjust them in this manner as well.

tj: * Adjusting sg after padding is done in block layer.  Make libata
      set queue alignment correctly for ATAPI devices and drop broken
      sg mangling from ata_sg_setup().
    * Use request->raw_data_len for ATAPI transfer chunk size.
    * Killed qc->raw_nbytes.
    * Separated out killing qc->n_iter.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-02-19 11:36:56 +01:00

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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_COMMON_LFLAGS = ATA_LFLAG_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[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_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 not 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 */
int do_port_rst;
};
static void sil24_dev_config(struct ata_device *dev);
static u8 sil24_check_status(struct ata_port *ap);
static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val);
static int 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 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 void sil24_irq_clear(struct ata_port *ap);
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 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, 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 = {
.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 = SIL24_MAX_SGE,
.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,
};
static const struct ata_port_operations sil24_ops = {
.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_defer = sil24_qc_defer,
.qc_prep = sil24_qc_prep,
.qc_issue = sil24_qc_issue,
.irq_clear = sil24_irq_clear,
.scr_read = sil24_scr_read,
.scr_write = sil24_scr_write,
.pmp_attach = sil24_pmp_attach,
.pmp_detach = sil24_pmp_detach,
.freeze = sil24_freeze,
.thaw = sil24_thaw,
.error_handler = sil24_error_handler,
.post_internal_cmd = sil24_post_internal_cmd,
.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,
.link_flags = SIL24_COMMON_LFLAGS,
.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),
.link_flags = SIL24_COMMON_LFLAGS,
.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),
.link_flags = SIL24_COMMON_LFLAGS,
.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 void sil24_dev_config(struct ata_device *dev)
{
void __iomem *port = dev->link->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 void sil24_read_tf(struct ata_port *ap, int tag, struct ata_taskfile *tf)
{
void __iomem *port = ap->ioaddr.cmd_addr;
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 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 int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val)
{
void __iomem *scr_addr = ap->ioaddr.scr_addr;
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_port *ap, unsigned sc_reg, u32 val)
{
void __iomem *scr_addr = 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);
return 0;
}
return -EINVAL;
}
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 void sil24_config_port(struct ata_port *ap)
{
void __iomem *port = ap->ioaddr.cmd_addr;
/* 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 = ap->ioaddr.cmd_addr;
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 = ap->ioaddr.cmd_addr;
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 = ap->ioaddr.cmd_addr;
struct sil24_port_priv *pp = ap->private_data;
u32 tmp;
/* clear PMP error status */
if (ap->nr_pmp_links)
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_HARDRESET;
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 = 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 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_do_softreset(struct ata_link *link, unsigned int *class,
int pmp, unsigned long deadline)
{
struct ata_port *ap = link->ap;
unsigned long timeout_msec = 0;
struct ata_taskfile tf;
const char *reason;
int rc;
DPRINTK("ENTER\n");
if (ata_link_offline(link)) {
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 */
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);
if (*class == ATA_DEV_UNKNOWN)
*class = ATA_DEV_NONE;
out:
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_softreset(struct ata_link *link, unsigned int *class,
unsigned long deadline)
{
return sil24_do_softreset(link, class, SATA_PMP_CTRL_PORT, deadline);
}
static int sil24_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline)
{
struct ata_port *ap = link->ap;
void __iomem *port = ap->ioaddr.cmd_addr;
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 = 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_pmp_attach(struct ata_port *ap)
{
sil24_config_pmp(ap, 1);
sil24_init_port(ap);
}
static void sil24_pmp_detach(struct ata_port *ap)
{
sil24_init_port(ap);
sil24_config_pmp(ap, 0);
}
static int sil24_pmp_softreset(struct ata_link *link, unsigned int *class,
unsigned long deadline)
{
return sil24_do_softreset(link, class, link->pmp, deadline);
}
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_pmp_std_hardreset(link, class, deadline);
}
static void sil24_freeze(struct ata_port *ap)
{
void __iomem *port = 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 = 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 = ap->ioaddr.cmd_addr;
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_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;
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_HARDRESET;
ata_ehi_push_desc(ehi, "PMP DMA CS errata");
pp->do_port_rst = 1;
freeze = 1;
}
/* find out the offending link and qc */
if (ap->nr_pmp_links) {
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_HARDRESET;
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_MASK)
freeze = 1;
ata_ehi_push_desc(ehi, "%s", ci->desc);
} else {
err_mask |= AC_ERR_OTHER;
action |= ATA_EH_SOFTRESET;
freeze = 1;
ata_ehi_push_desc(ehi, "unknown command error %d",
cerr);
}
/* record error info */
if (qc) {
sil24_read_tf(ap, qc->tag, &pp->tf);
qc->err_mask |= err_mask;
} else
ehi->err_mask |= err_mask;
ehi->action |= action;
/* if PMP, resume */
if (ap->nr_pmp_links)
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 void sil24_finish_qc(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct sil24_port_priv *pp = ap->private_data;
if (qc->flags & ATA_QCFLAG_RESULT_TF)
sil24_read_tf(ap, qc->tag, &pp->tf);
}
static inline void sil24_host_intr(struct ata_port *ap)
{
void __iomem *port = ap->ioaddr.cmd_addr;
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, sil24_finish_qc);
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_SOFTRESET;
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);
/* perform recovery */
sata_pmp_do_eh(ap, ata_std_prereset, sil24_softreset, sil24_hardreset,
ata_std_postreset, sata_pmp_std_prereset,
sil24_pmp_softreset, sil24_pmp_hardreset,
sata_pmp_std_postreset);
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;
pp->tf.command = ATA_DRDY;
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;
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 = ap->ioaddr.cmd_addr;
/* 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 i, 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;
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];
size_t offset = ap->port_no * PORT_REGS_SIZE;
void __iomem *port = iomap[SIL24_PORT_BAR] + offset;
host->ports[i]->ioaddr.cmd_addr = port;
host->ports[i]->ioaddr.scr_addr = port + PORT_SCONTROL;
ata_port_pbar_desc(ap, SIL24_HOST_BAR, -1, "host");
ata_port_pbar_desc(ap, SIL24_PORT_BAR, offset, "port");
}
/* 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;
}
}
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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