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linux/drivers/ata/ahci.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

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/*
* ahci.c - AHCI SATA support
*
* Maintained by: Jeff Garzik <jgarzik@pobox.com>
* Please ALWAYS copy linux-ide@vger.kernel.org
* on emails.
*
* Copyright 2004-2005 Red Hat, Inc.
*
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* libata documentation is available via 'make {ps|pdf}docs',
* as Documentation/DocBook/libata.*
*
* AHCI hardware documentation:
* http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
* http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/dma-mapping.h>
#include <linux/device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <linux/libata.h>
#include <asm/io.h>
#define DRV_NAME "ahci"
#define DRV_VERSION "2.0"
enum {
AHCI_PCI_BAR = 5,
AHCI_MAX_SG = 168, /* hardware max is 64K */
AHCI_DMA_BOUNDARY = 0xffffffff,
AHCI_USE_CLUSTERING = 0,
AHCI_MAX_CMDS = 32,
AHCI_CMD_SZ = 32,
AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
AHCI_RX_FIS_SZ = 256,
AHCI_CMD_TBL_CDB = 0x40,
AHCI_CMD_TBL_HDR_SZ = 0x80,
AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
AHCI_RX_FIS_SZ,
AHCI_IRQ_ON_SG = (1 << 31),
AHCI_CMD_ATAPI = (1 << 5),
AHCI_CMD_WRITE = (1 << 6),
AHCI_CMD_PREFETCH = (1 << 7),
AHCI_CMD_RESET = (1 << 8),
AHCI_CMD_CLR_BUSY = (1 << 10),
RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
board_ahci = 0,
board_ahci_vt8251 = 1,
/* global controller registers */
HOST_CAP = 0x00, /* host capabilities */
HOST_CTL = 0x04, /* global host control */
HOST_IRQ_STAT = 0x08, /* interrupt status */
HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
/* HOST_CTL bits */
HOST_RESET = (1 << 0), /* reset controller; self-clear */
HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
/* HOST_CAP bits */
HOST_CAP_SSC = (1 << 14), /* Slumber capable */
HOST_CAP_CLO = (1 << 24), /* Command List Override support */
HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
/* registers for each SATA port */
PORT_LST_ADDR = 0x00, /* command list DMA addr */
PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
PORT_IRQ_STAT = 0x10, /* interrupt status */
PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
PORT_CMD = 0x18, /* port command */
PORT_TFDATA = 0x20, /* taskfile data */
PORT_SIG = 0x24, /* device TF signature */
PORT_CMD_ISSUE = 0x38, /* command issue */
PORT_SCR = 0x28, /* SATA phy register block */
PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
/* PORT_IRQ_{STAT,MASK} bits */
PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
PORT_IRQ_IF_ERR |
PORT_IRQ_CONNECT |
PORT_IRQ_PHYRDY |
PORT_IRQ_UNK_FIS,
PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
PORT_IRQ_TF_ERR |
PORT_IRQ_HBUS_DATA_ERR,
DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
/* PORT_CMD bits */
PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
PORT_CMD_CLO = (1 << 3), /* Command list override */
PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
/* hpriv->flags bits */
AHCI_FLAG_MSI = (1 << 0),
/* ap->flags bits */
AHCI_FLAG_RESET_NEEDS_CLO = (1 << 24),
AHCI_FLAG_NO_NCQ = (1 << 25),
};
struct ahci_cmd_hdr {
u32 opts;
u32 status;
u32 tbl_addr;
u32 tbl_addr_hi;
u32 reserved[4];
};
struct ahci_sg {
u32 addr;
u32 addr_hi;
u32 reserved;
u32 flags_size;
};
struct ahci_host_priv {
unsigned long flags;
u32 cap; /* cache of HOST_CAP register */
u32 port_map; /* cache of HOST_PORTS_IMPL reg */
};
struct ahci_port_priv {
struct ahci_cmd_hdr *cmd_slot;
dma_addr_t cmd_slot_dma;
void *cmd_tbl;
dma_addr_t cmd_tbl_dma;
void *rx_fis;
dma_addr_t rx_fis_dma;
};
static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
static irqreturn_t ahci_interrupt (int irq, void *dev_instance);
static void ahci_irq_clear(struct ata_port *ap);
static int ahci_port_start(struct ata_port *ap);
static void ahci_port_stop(struct ata_port *ap);
static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
static void ahci_qc_prep(struct ata_queued_cmd *qc);
static u8 ahci_check_status(struct ata_port *ap);
static void ahci_freeze(struct ata_port *ap);
static void ahci_thaw(struct ata_port *ap);
static void ahci_error_handler(struct ata_port *ap);
static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
static int ahci_port_resume(struct ata_port *ap);
static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
static int ahci_pci_device_resume(struct pci_dev *pdev);
static void ahci_remove_one (struct pci_dev *pdev);
static struct scsi_host_template ahci_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 = AHCI_MAX_CMDS - 1,
.this_id = ATA_SHT_THIS_ID,
.sg_tablesize = AHCI_MAX_SG,
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
.emulated = ATA_SHT_EMULATED,
.use_clustering = AHCI_USE_CLUSTERING,
.proc_name = DRV_NAME,
.dma_boundary = AHCI_DMA_BOUNDARY,
.slave_configure = ata_scsi_slave_config,
.slave_destroy = ata_scsi_slave_destroy,
.bios_param = ata_std_bios_param,
.suspend = ata_scsi_device_suspend,
.resume = ata_scsi_device_resume,
};
static const struct ata_port_operations ahci_ops = {
.port_disable = ata_port_disable,
.check_status = ahci_check_status,
.check_altstatus = ahci_check_status,
.dev_select = ata_noop_dev_select,
.tf_read = ahci_tf_read,
.qc_prep = ahci_qc_prep,
.qc_issue = ahci_qc_issue,
.irq_handler = ahci_interrupt,
.irq_clear = ahci_irq_clear,
.scr_read = ahci_scr_read,
.scr_write = ahci_scr_write,
.freeze = ahci_freeze,
.thaw = ahci_thaw,
.error_handler = ahci_error_handler,
.post_internal_cmd = ahci_post_internal_cmd,
.port_suspend = ahci_port_suspend,
.port_resume = ahci_port_resume,
.port_start = ahci_port_start,
.port_stop = ahci_port_stop,
};
static const struct ata_port_info ahci_port_info[] = {
/* board_ahci */
{
.sht = &ahci_sht,
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
ATA_FLAG_SKIP_D2H_BSY,
.pio_mask = 0x1f, /* pio0-4 */
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
.port_ops = &ahci_ops,
},
/* board_ahci_vt8251 */
{
.sht = &ahci_sht,
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
ATA_FLAG_SKIP_D2H_BSY |
AHCI_FLAG_RESET_NEEDS_CLO | AHCI_FLAG_NO_NCQ,
.pio_mask = 0x1f, /* pio0-4 */
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
.port_ops = &ahci_ops,
},
};
static const struct pci_device_id ahci_pci_tbl[] = {
/* Intel */
{ PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
{ PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
{ PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
{ PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
{ PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
{ PCI_VDEVICE(AL, 0x5288), board_ahci }, /* ULi M5288 */
{ PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
{ PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
{ PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
{ PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
{ PCI_VDEVICE(INTEL, 0x2821), board_ahci }, /* ICH8 */
{ PCI_VDEVICE(INTEL, 0x2822), board_ahci }, /* ICH8 */
{ PCI_VDEVICE(INTEL, 0x2824), board_ahci }, /* ICH8 */
{ PCI_VDEVICE(INTEL, 0x2829), board_ahci }, /* ICH8M */
{ PCI_VDEVICE(INTEL, 0x282a), board_ahci }, /* ICH8M */
/* JMicron */
{ PCI_VDEVICE(JMICRON, 0x2360), board_ahci }, /* JMicron JMB360 */
{ PCI_VDEVICE(JMICRON, 0x2361), board_ahci }, /* JMicron JMB361 */
{ PCI_VDEVICE(JMICRON, 0x2363), board_ahci }, /* JMicron JMB363 */
{ PCI_VDEVICE(JMICRON, 0x2365), board_ahci }, /* JMicron JMB365 */
{ PCI_VDEVICE(JMICRON, 0x2366), board_ahci }, /* JMicron JMB366 */
/* ATI */
{ PCI_VDEVICE(ATI, 0x4380), board_ahci }, /* ATI SB600 non-raid */
{ PCI_VDEVICE(ATI, 0x4381), board_ahci }, /* ATI SB600 raid */
/* VIA */
{ PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
/* NVIDIA */
{ PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
{ PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
{ PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
{ PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
/* SiS */
{ PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
{ PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
{ PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
{ } /* terminate list */
};
static struct pci_driver ahci_pci_driver = {
.name = DRV_NAME,
.id_table = ahci_pci_tbl,
.probe = ahci_init_one,
.suspend = ahci_pci_device_suspend,
.resume = ahci_pci_device_resume,
.remove = ahci_remove_one,
};
static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port)
{
return base + 0x100 + (port * 0x80);
}
static inline void __iomem *ahci_port_base (void __iomem *base, unsigned int port)
{
return (void __iomem *) ahci_port_base_ul((unsigned long)base, port);
}
static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
{
unsigned int sc_reg;
switch (sc_reg_in) {
case SCR_STATUS: sc_reg = 0; break;
case SCR_CONTROL: sc_reg = 1; break;
case SCR_ERROR: sc_reg = 2; break;
case SCR_ACTIVE: sc_reg = 3; break;
default:
return 0xffffffffU;
}
return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
}
static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
u32 val)
{
unsigned int sc_reg;
switch (sc_reg_in) {
case SCR_STATUS: sc_reg = 0; break;
case SCR_CONTROL: sc_reg = 1; break;
case SCR_ERROR: sc_reg = 2; break;
case SCR_ACTIVE: sc_reg = 3; break;
default:
return;
}
writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
}
static void ahci_start_engine(void __iomem *port_mmio)
{
u32 tmp;
/* start DMA */
tmp = readl(port_mmio + PORT_CMD);
tmp |= PORT_CMD_START;
writel(tmp, port_mmio + PORT_CMD);
readl(port_mmio + PORT_CMD); /* flush */
}
static int ahci_stop_engine(void __iomem *port_mmio)
{
u32 tmp;
tmp = readl(port_mmio + PORT_CMD);
/* check if the HBA is idle */
if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
return 0;
/* setting HBA to idle */
tmp &= ~PORT_CMD_START;
writel(tmp, port_mmio + PORT_CMD);
/* wait for engine to stop. This could be as long as 500 msec */
tmp = ata_wait_register(port_mmio + PORT_CMD,
PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
if (tmp & PORT_CMD_LIST_ON)
return -EIO;
return 0;
}
static void ahci_start_fis_rx(void __iomem *port_mmio, u32 cap,
dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
{
u32 tmp;
/* set FIS registers */
if (cap & HOST_CAP_64)
writel((cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
writel(cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
if (cap & HOST_CAP_64)
writel((rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
writel(rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
/* enable FIS reception */
tmp = readl(port_mmio + PORT_CMD);
tmp |= PORT_CMD_FIS_RX;
writel(tmp, port_mmio + PORT_CMD);
/* flush */
readl(port_mmio + PORT_CMD);
}
static int ahci_stop_fis_rx(void __iomem *port_mmio)
{
u32 tmp;
/* disable FIS reception */
tmp = readl(port_mmio + PORT_CMD);
tmp &= ~PORT_CMD_FIS_RX;
writel(tmp, port_mmio + PORT_CMD);
/* wait for completion, spec says 500ms, give it 1000 */
tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
PORT_CMD_FIS_ON, 10, 1000);
if (tmp & PORT_CMD_FIS_ON)
return -EBUSY;
return 0;
}
static void ahci_power_up(void __iomem *port_mmio, u32 cap)
{
u32 cmd;
cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
/* spin up device */
if (cap & HOST_CAP_SSS) {
cmd |= PORT_CMD_SPIN_UP;
writel(cmd, port_mmio + PORT_CMD);
}
/* wake up link */
writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
}
static void ahci_power_down(void __iomem *port_mmio, u32 cap)
{
u32 cmd, scontrol;
cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
if (cap & HOST_CAP_SSC) {
/* enable transitions to slumber mode */
scontrol = readl(port_mmio + PORT_SCR_CTL);
if ((scontrol & 0x0f00) > 0x100) {
scontrol &= ~0xf00;
writel(scontrol, port_mmio + PORT_SCR_CTL);
}
/* put device into slumber mode */
writel(cmd | PORT_CMD_ICC_SLUMBER, port_mmio + PORT_CMD);
/* wait for the transition to complete */
ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_ICC_SLUMBER,
PORT_CMD_ICC_SLUMBER, 1, 50);
}
/* put device into listen mode */
if (cap & HOST_CAP_SSS) {
/* first set PxSCTL.DET to 0 */
scontrol = readl(port_mmio + PORT_SCR_CTL);
scontrol &= ~0xf;
writel(scontrol, port_mmio + PORT_SCR_CTL);
/* then set PxCMD.SUD to 0 */
cmd &= ~PORT_CMD_SPIN_UP;
writel(cmd, port_mmio + PORT_CMD);
}
}
static void ahci_init_port(void __iomem *port_mmio, u32 cap,
dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
{
/* power up */
ahci_power_up(port_mmio, cap);
/* enable FIS reception */
ahci_start_fis_rx(port_mmio, cap, cmd_slot_dma, rx_fis_dma);
/* enable DMA */
ahci_start_engine(port_mmio);
}
static int ahci_deinit_port(void __iomem *port_mmio, u32 cap, const char **emsg)
{
int rc;
/* disable DMA */
rc = ahci_stop_engine(port_mmio);
if (rc) {
*emsg = "failed to stop engine";
return rc;
}
/* disable FIS reception */
rc = ahci_stop_fis_rx(port_mmio);
if (rc) {
*emsg = "failed stop FIS RX";
return rc;
}
/* put device into slumber mode */
ahci_power_down(port_mmio, cap);
return 0;
}
static int ahci_reset_controller(void __iomem *mmio, struct pci_dev *pdev)
{
u32 cap_save, tmp;
cap_save = readl(mmio + HOST_CAP);
cap_save &= ( (1<<28) | (1<<17) );
cap_save |= (1 << 27);
/* global controller reset */
tmp = readl(mmio + HOST_CTL);
if ((tmp & HOST_RESET) == 0) {
writel(tmp | HOST_RESET, mmio + HOST_CTL);
readl(mmio + HOST_CTL); /* flush */
}
/* reset must complete within 1 second, or
* the hardware should be considered fried.
*/
ssleep(1);
tmp = readl(mmio + HOST_CTL);
if (tmp & HOST_RESET) {
dev_printk(KERN_ERR, &pdev->dev,
"controller reset failed (0x%x)\n", tmp);
return -EIO;
}
writel(HOST_AHCI_EN, mmio + HOST_CTL);
(void) readl(mmio + HOST_CTL); /* flush */
writel(cap_save, mmio + HOST_CAP);
writel(0xf, mmio + HOST_PORTS_IMPL);
(void) readl(mmio + HOST_PORTS_IMPL); /* flush */
if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
u16 tmp16;
/* configure PCS */
pci_read_config_word(pdev, 0x92, &tmp16);
tmp16 |= 0xf;
pci_write_config_word(pdev, 0x92, tmp16);
}
return 0;
}
static void ahci_init_controller(void __iomem *mmio, struct pci_dev *pdev,
int n_ports, u32 cap)
{
int i, rc;
u32 tmp;
for (i = 0; i < n_ports; i++) {
void __iomem *port_mmio = ahci_port_base(mmio, i);
const char *emsg = NULL;
#if 0 /* BIOSen initialize this incorrectly */
if (!(hpriv->port_map & (1 << i)))
continue;
#endif
/* make sure port is not active */
rc = ahci_deinit_port(port_mmio, cap, &emsg);
if (rc)
dev_printk(KERN_WARNING, &pdev->dev,
"%s (%d)\n", emsg, rc);
/* clear SError */
tmp = readl(port_mmio + PORT_SCR_ERR);
VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
writel(tmp, port_mmio + PORT_SCR_ERR);
/* clear port IRQ */
tmp = readl(port_mmio + PORT_IRQ_STAT);
VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
if (tmp)
writel(tmp, port_mmio + PORT_IRQ_STAT);
writel(1 << i, mmio + HOST_IRQ_STAT);
}
tmp = readl(mmio + HOST_CTL);
VPRINTK("HOST_CTL 0x%x\n", tmp);
writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
tmp = readl(mmio + HOST_CTL);
VPRINTK("HOST_CTL 0x%x\n", tmp);
}
static unsigned int ahci_dev_classify(struct ata_port *ap)
{
void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
struct ata_taskfile tf;
u32 tmp;
tmp = readl(port_mmio + PORT_SIG);
tf.lbah = (tmp >> 24) & 0xff;
tf.lbam = (tmp >> 16) & 0xff;
tf.lbal = (tmp >> 8) & 0xff;
tf.nsect = (tmp) & 0xff;
return ata_dev_classify(&tf);
}
static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
u32 opts)
{
dma_addr_t cmd_tbl_dma;
cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
pp->cmd_slot[tag].opts = cpu_to_le32(opts);
pp->cmd_slot[tag].status = 0;
pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
}
static int ahci_clo(struct ata_port *ap)
{
void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
struct ahci_host_priv *hpriv = ap->host->private_data;
u32 tmp;
if (!(hpriv->cap & HOST_CAP_CLO))
return -EOPNOTSUPP;
tmp = readl(port_mmio + PORT_CMD);
tmp |= PORT_CMD_CLO;
writel(tmp, port_mmio + PORT_CMD);
tmp = ata_wait_register(port_mmio + PORT_CMD,
PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
if (tmp & PORT_CMD_CLO)
return -EIO;
return 0;
}
static int ahci_prereset(struct ata_port *ap)
{
if ((ap->flags & AHCI_FLAG_RESET_NEEDS_CLO) &&
(ata_busy_wait(ap, ATA_BUSY, 1000) & ATA_BUSY)) {
/* ATA_BUSY hasn't cleared, so send a CLO */
ahci_clo(ap);
}
return ata_std_prereset(ap);
}
static int ahci_softreset(struct ata_port *ap, unsigned int *class)
{
struct ahci_port_priv *pp = ap->private_data;
void __iomem *mmio = ap->host->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
const u32 cmd_fis_len = 5; /* five dwords */
const char *reason = NULL;
struct ata_taskfile tf;
u32 tmp;
u8 *fis;
int rc;
DPRINTK("ENTER\n");
if (ata_port_offline(ap)) {
DPRINTK("PHY reports no device\n");
*class = ATA_DEV_NONE;
return 0;
}
/* prepare for SRST (AHCI-1.1 10.4.1) */
rc = ahci_stop_engine(port_mmio);
if (rc) {
reason = "failed to stop engine";
goto fail_restart;
}
/* check BUSY/DRQ, perform Command List Override if necessary */
ahci_tf_read(ap, &tf);
if (tf.command & (ATA_BUSY | ATA_DRQ)) {
rc = ahci_clo(ap);
if (rc == -EOPNOTSUPP) {
reason = "port busy but CLO unavailable";
goto fail_restart;
} else if (rc) {
reason = "port busy but CLO failed";
goto fail_restart;
}
}
/* restart engine */
ahci_start_engine(port_mmio);
ata_tf_init(ap->device, &tf);
fis = pp->cmd_tbl;
/* issue the first D2H Register FIS */
ahci_fill_cmd_slot(pp, 0,
cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
tf.ctl |= ATA_SRST;
ata_tf_to_fis(&tf, fis, 0);
fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
writel(1, port_mmio + PORT_CMD_ISSUE);
tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500);
if (tmp & 0x1) {
rc = -EIO;
reason = "1st FIS failed";
goto fail;
}
/* spec says at least 5us, but be generous and sleep for 1ms */
msleep(1);
/* issue the second D2H Register FIS */
ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
tf.ctl &= ~ATA_SRST;
ata_tf_to_fis(&tf, fis, 0);
fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
writel(1, port_mmio + PORT_CMD_ISSUE);
readl(port_mmio + PORT_CMD_ISSUE); /* flush */
/* spec mandates ">= 2ms" before checking status.
* We wait 150ms, because that was the magic delay used for
* ATAPI devices in Hale Landis's ATADRVR, for the period of time
* between when the ATA command register is written, and then
* status is checked. Because waiting for "a while" before
* checking status is fine, post SRST, we perform this magic
* delay here as well.
*/
msleep(150);
*class = ATA_DEV_NONE;
if (ata_port_online(ap)) {
if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
rc = -EIO;
reason = "device not ready";
goto fail;
}
*class = ahci_dev_classify(ap);
}
DPRINTK("EXIT, class=%u\n", *class);
return 0;
fail_restart:
ahci_start_engine(port_mmio);
fail:
ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
return rc;
}
static int ahci_hardreset(struct ata_port *ap, unsigned int *class)
{
struct ahci_port_priv *pp = ap->private_data;
u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
struct ata_taskfile tf;
void __iomem *mmio = ap->host->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
int rc;
DPRINTK("ENTER\n");
ahci_stop_engine(port_mmio);
/* clear D2H reception area to properly wait for D2H FIS */
ata_tf_init(ap->device, &tf);
tf.command = 0xff;
ata_tf_to_fis(&tf, d2h_fis, 0);
rc = sata_std_hardreset(ap, class);
ahci_start_engine(port_mmio);
if (rc == 0 && ata_port_online(ap))
*class = ahci_dev_classify(ap);
if (*class == ATA_DEV_UNKNOWN)
*class = ATA_DEV_NONE;
DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
return rc;
}
static void ahci_postreset(struct ata_port *ap, unsigned int *class)
{
void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
u32 new_tmp, tmp;
ata_std_postreset(ap, class);
/* Make sure port's ATAPI bit is set appropriately */
new_tmp = tmp = readl(port_mmio + PORT_CMD);
if (*class == ATA_DEV_ATAPI)
new_tmp |= PORT_CMD_ATAPI;
else
new_tmp &= ~PORT_CMD_ATAPI;
if (new_tmp != tmp) {
writel(new_tmp, port_mmio + PORT_CMD);
readl(port_mmio + PORT_CMD); /* flush */
}
}
static u8 ahci_check_status(struct ata_port *ap)
{
void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
return readl(mmio + PORT_TFDATA) & 0xFF;
}
static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
{
struct ahci_port_priv *pp = ap->private_data;
u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
ata_tf_from_fis(d2h_fis, tf);
}
static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
{
struct scatterlist *sg;
struct ahci_sg *ahci_sg;
unsigned int n_sg = 0;
VPRINTK("ENTER\n");
/*
* Next, the S/G list.
*/
ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
ata_for_each_sg(sg, qc) {
dma_addr_t addr = sg_dma_address(sg);
u32 sg_len = sg_dma_len(sg);
ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
ahci_sg++;
n_sg++;
}
return n_sg;
}
static void ahci_qc_prep(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct ahci_port_priv *pp = ap->private_data;
int is_atapi = is_atapi_taskfile(&qc->tf);
void *cmd_tbl;
u32 opts;
const u32 cmd_fis_len = 5; /* five dwords */
unsigned int n_elem;
/*
* Fill in command table information. First, the header,
* a SATA Register - Host to Device command FIS.
*/
cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
ata_tf_to_fis(&qc->tf, cmd_tbl, 0);
if (is_atapi) {
memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
}
n_elem = 0;
if (qc->flags & ATA_QCFLAG_DMAMAP)
n_elem = ahci_fill_sg(qc, cmd_tbl);
/*
* Fill in command slot information.
*/
opts = cmd_fis_len | n_elem << 16;
if (qc->tf.flags & ATA_TFLAG_WRITE)
opts |= AHCI_CMD_WRITE;
if (is_atapi)
opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
ahci_fill_cmd_slot(pp, qc->tag, opts);
}
static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
{
struct ahci_port_priv *pp = ap->private_data;
struct ata_eh_info *ehi = &ap->eh_info;
unsigned int err_mask = 0, action = 0;
struct ata_queued_cmd *qc;
u32 serror;
ata_ehi_clear_desc(ehi);
/* AHCI needs SError cleared; otherwise, it might lock up */
serror = ahci_scr_read(ap, SCR_ERROR);
ahci_scr_write(ap, SCR_ERROR, serror);
/* analyze @irq_stat */
ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
if (irq_stat & PORT_IRQ_TF_ERR)
err_mask |= AC_ERR_DEV;
if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
err_mask |= AC_ERR_HOST_BUS;
action |= ATA_EH_SOFTRESET;
}
if (irq_stat & PORT_IRQ_IF_ERR) {
err_mask |= AC_ERR_ATA_BUS;
action |= ATA_EH_SOFTRESET;
ata_ehi_push_desc(ehi, ", interface fatal error");
}
if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
ata_ehi_hotplugged(ehi);
ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ?
"connection status changed" : "PHY RDY changed");
}
if (irq_stat & PORT_IRQ_UNK_FIS) {
u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
err_mask |= AC_ERR_HSM;
action |= ATA_EH_SOFTRESET;
ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x",
unk[0], unk[1], unk[2], unk[3]);
}
/* okay, let's hand over to EH */
ehi->serror |= serror;
ehi->action |= action;
qc = ata_qc_from_tag(ap, ap->active_tag);
if (qc)
qc->err_mask |= err_mask;
else
ehi->err_mask |= err_mask;
if (irq_stat & PORT_IRQ_FREEZE)
ata_port_freeze(ap);
else
ata_port_abort(ap);
}
static void ahci_host_intr(struct ata_port *ap)
{
void __iomem *mmio = ap->host->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
struct ata_eh_info *ehi = &ap->eh_info;
u32 status, qc_active;
int rc;
status = readl(port_mmio + PORT_IRQ_STAT);
writel(status, port_mmio + PORT_IRQ_STAT);
if (unlikely(status & PORT_IRQ_ERROR)) {
ahci_error_intr(ap, status);
return;
}
if (ap->sactive)
qc_active = readl(port_mmio + PORT_SCR_ACT);
else
qc_active = readl(port_mmio + PORT_CMD_ISSUE);
rc = ata_qc_complete_multiple(ap, qc_active, NULL);
if (rc > 0)
return;
if (rc < 0) {
ehi->err_mask |= AC_ERR_HSM;
ehi->action |= ATA_EH_SOFTRESET;
ata_port_freeze(ap);
return;
}
/* hmmm... a spurious interupt */
/* some devices send D2H reg with I bit set during NCQ command phase */
if (ap->sactive && status & PORT_IRQ_D2H_REG_FIS)
return;
/* ignore interim PIO setup fis interrupts */
if (ata_tag_valid(ap->active_tag) && (status & PORT_IRQ_PIOS_FIS))
return;
if (ata_ratelimit())
ata_port_printk(ap, KERN_INFO, "spurious interrupt "
"(irq_stat 0x%x active_tag %d sactive 0x%x)\n",
status, ap->active_tag, ap->sactive);
}
static void ahci_irq_clear(struct ata_port *ap)
{
/* TODO */
}
static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
{
struct ata_host *host = dev_instance;
struct ahci_host_priv *hpriv;
unsigned int i, handled = 0;
void __iomem *mmio;
u32 irq_stat, irq_ack = 0;
VPRINTK("ENTER\n");
hpriv = host->private_data;
mmio = host->mmio_base;
/* sigh. 0xffffffff is a valid return from h/w */
irq_stat = readl(mmio + HOST_IRQ_STAT);
irq_stat &= hpriv->port_map;
if (!irq_stat)
return IRQ_NONE;
spin_lock(&host->lock);
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap;
if (!(irq_stat & (1 << i)))
continue;
ap = host->ports[i];
if (ap) {
ahci_host_intr(ap);
VPRINTK("port %u\n", i);
} else {
VPRINTK("port %u (no irq)\n", i);
if (ata_ratelimit())
dev_printk(KERN_WARNING, host->dev,
"interrupt on disabled port %u\n", i);
}
irq_ack |= (1 << i);
}
if (irq_ack) {
writel(irq_ack, mmio + HOST_IRQ_STAT);
handled = 1;
}
spin_unlock(&host->lock);
VPRINTK("EXIT\n");
return IRQ_RETVAL(handled);
}
static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
if (qc->tf.protocol == ATA_PROT_NCQ)
writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
readl(port_mmio + PORT_CMD_ISSUE); /* flush */
return 0;
}
static void ahci_freeze(struct ata_port *ap)
{
void __iomem *mmio = ap->host->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
/* turn IRQ off */
writel(0, port_mmio + PORT_IRQ_MASK);
}
static void ahci_thaw(struct ata_port *ap)
{
void __iomem *mmio = ap->host->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
u32 tmp;
/* clear IRQ */
tmp = readl(port_mmio + PORT_IRQ_STAT);
writel(tmp, port_mmio + PORT_IRQ_STAT);
writel(1 << ap->id, mmio + HOST_IRQ_STAT);
/* turn IRQ back on */
writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
}
static void ahci_error_handler(struct ata_port *ap)
{
void __iomem *mmio = ap->host->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
/* restart engine */
ahci_stop_engine(port_mmio);
ahci_start_engine(port_mmio);
}
/* perform recovery */
ata_do_eh(ap, ahci_prereset, ahci_softreset, ahci_hardreset,
ahci_postreset);
}
static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
void __iomem *mmio = ap->host->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
if (qc->flags & ATA_QCFLAG_FAILED)
qc->err_mask |= AC_ERR_OTHER;
if (qc->err_mask) {
/* make DMA engine forget about the failed command */
ahci_stop_engine(port_mmio);
ahci_start_engine(port_mmio);
}
}
static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
{
struct ahci_host_priv *hpriv = ap->host->private_data;
struct ahci_port_priv *pp = ap->private_data;
void __iomem *mmio = ap->host->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
const char *emsg = NULL;
int rc;
rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
if (rc) {
ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
ahci_init_port(port_mmio, hpriv->cap,
pp->cmd_slot_dma, pp->rx_fis_dma);
}
return rc;
}
static int ahci_port_resume(struct ata_port *ap)
{
struct ahci_port_priv *pp = ap->private_data;
struct ahci_host_priv *hpriv = ap->host->private_data;
void __iomem *mmio = ap->host->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
return 0;
}
static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
void __iomem *mmio = host->mmio_base;
u32 ctl;
if (mesg.event == PM_EVENT_SUSPEND) {
/* AHCI spec rev1.1 section 8.3.3:
* Software must disable interrupts prior to requesting a
* transition of the HBA to D3 state.
*/
ctl = readl(mmio + HOST_CTL);
ctl &= ~HOST_IRQ_EN;
writel(ctl, mmio + HOST_CTL);
readl(mmio + HOST_CTL); /* flush */
}
return ata_pci_device_suspend(pdev, mesg);
}
static int ahci_pci_device_resume(struct pci_dev *pdev)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
struct ahci_host_priv *hpriv = host->private_data;
void __iomem *mmio = host->mmio_base;
int rc;
ata_pci_device_do_resume(pdev);
if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
rc = ahci_reset_controller(mmio, pdev);
if (rc)
return rc;
ahci_init_controller(mmio, pdev, host->n_ports, hpriv->cap);
}
ata_host_resume(host);
return 0;
}
static int ahci_port_start(struct ata_port *ap)
{
struct device *dev = ap->host->dev;
struct ahci_host_priv *hpriv = ap->host->private_data;
struct ahci_port_priv *pp;
void __iomem *mmio = ap->host->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
void *mem;
dma_addr_t mem_dma;
int rc;
pp = kmalloc(sizeof(*pp), GFP_KERNEL);
if (!pp)
return -ENOMEM;
memset(pp, 0, sizeof(*pp));
rc = ata_pad_alloc(ap, dev);
if (rc) {
kfree(pp);
return rc;
}
mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
if (!mem) {
ata_pad_free(ap, dev);
kfree(pp);
return -ENOMEM;
}
memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
/*
* First item in chunk of DMA memory: 32-slot command table,
* 32 bytes each in size
*/
pp->cmd_slot = mem;
pp->cmd_slot_dma = mem_dma;
mem += AHCI_CMD_SLOT_SZ;
mem_dma += AHCI_CMD_SLOT_SZ;
/*
* Second item: Received-FIS area
*/
pp->rx_fis = mem;
pp->rx_fis_dma = mem_dma;
mem += AHCI_RX_FIS_SZ;
mem_dma += AHCI_RX_FIS_SZ;
/*
* Third item: data area for storing a single command
* and its scatter-gather table
*/
pp->cmd_tbl = mem;
pp->cmd_tbl_dma = mem_dma;
ap->private_data = pp;
/* initialize port */
ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
return 0;
}
static void ahci_port_stop(struct ata_port *ap)
{
struct device *dev = ap->host->dev;
struct ahci_host_priv *hpriv = ap->host->private_data;
struct ahci_port_priv *pp = ap->private_data;
void __iomem *mmio = ap->host->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
const char *emsg = NULL;
int rc;
/* de-initialize port */
rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
if (rc)
ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
ap->private_data = NULL;
dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
pp->cmd_slot, pp->cmd_slot_dma);
ata_pad_free(ap, dev);
kfree(pp);
}
static void ahci_setup_port(struct ata_ioports *port, unsigned long base,
unsigned int port_idx)
{
VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
base = ahci_port_base_ul(base, port_idx);
VPRINTK("base now==0x%lx\n", base);
port->cmd_addr = base;
port->scr_addr = base + PORT_SCR;
VPRINTK("EXIT\n");
}
static int ahci_host_init(struct ata_probe_ent *probe_ent)
{
struct ahci_host_priv *hpriv = probe_ent->private_data;
struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
void __iomem *mmio = probe_ent->mmio_base;
unsigned int i, using_dac;
int rc;
rc = ahci_reset_controller(mmio, pdev);
if (rc)
return rc;
hpriv->cap = readl(mmio + HOST_CAP);
hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
hpriv->cap, hpriv->port_map, probe_ent->n_ports);
using_dac = hpriv->cap & HOST_CAP_64;
if (using_dac &&
!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;
}
}
for (i = 0; i < probe_ent->n_ports; i++)
ahci_setup_port(&probe_ent->port[i], (unsigned long) mmio, i);
ahci_init_controller(mmio, pdev, probe_ent->n_ports, hpriv->cap);
pci_set_master(pdev);
return 0;
}
static void ahci_print_info(struct ata_probe_ent *probe_ent)
{
struct ahci_host_priv *hpriv = probe_ent->private_data;
struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
void __iomem *mmio = probe_ent->mmio_base;
u32 vers, cap, impl, speed;
const char *speed_s;
u16 cc;
const char *scc_s;
vers = readl(mmio + HOST_VERSION);
cap = hpriv->cap;
impl = hpriv->port_map;
speed = (cap >> 20) & 0xf;
if (speed == 1)
speed_s = "1.5";
else if (speed == 2)
speed_s = "3";
else
speed_s = "?";
pci_read_config_word(pdev, 0x0a, &cc);
if (cc == 0x0101)
scc_s = "IDE";
else if (cc == 0x0106)
scc_s = "SATA";
else if (cc == 0x0104)
scc_s = "RAID";
else
scc_s = "unknown";
dev_printk(KERN_INFO, &pdev->dev,
"AHCI %02x%02x.%02x%02x "
"%u slots %u ports %s Gbps 0x%x impl %s mode\n"
,
(vers >> 24) & 0xff,
(vers >> 16) & 0xff,
(vers >> 8) & 0xff,
vers & 0xff,
((cap >> 8) & 0x1f) + 1,
(cap & 0x1f) + 1,
speed_s,
impl,
scc_s);
dev_printk(KERN_INFO, &pdev->dev,
"flags: "
"%s%s%s%s%s%s"
"%s%s%s%s%s%s%s\n"
,
cap & (1 << 31) ? "64bit " : "",
cap & (1 << 30) ? "ncq " : "",
cap & (1 << 28) ? "ilck " : "",
cap & (1 << 27) ? "stag " : "",
cap & (1 << 26) ? "pm " : "",
cap & (1 << 25) ? "led " : "",
cap & (1 << 24) ? "clo " : "",
cap & (1 << 19) ? "nz " : "",
cap & (1 << 18) ? "only " : "",
cap & (1 << 17) ? "pmp " : "",
cap & (1 << 15) ? "pio " : "",
cap & (1 << 14) ? "slum " : "",
cap & (1 << 13) ? "part " : ""
);
}
static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int printed_version;
struct ata_probe_ent *probe_ent = NULL;
struct ahci_host_priv *hpriv;
unsigned long base;
void __iomem *mmio_base;
unsigned int board_idx = (unsigned int) ent->driver_data;
int have_msi, pci_dev_busy = 0;
int rc;
VPRINTK("ENTER\n");
WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
/* JMicron-specific fixup: make sure we're in AHCI mode */
/* This is protected from races with ata_jmicron by the pci probe
locking */
if (pdev->vendor == PCI_VENDOR_ID_JMICRON) {
/* AHCI enable, AHCI on function 0 */
pci_write_config_byte(pdev, 0x41, 0xa1);
/* Function 1 is the PATA controller */
if (PCI_FUNC(pdev->devfn))
return -ENODEV;
}
rc = pci_enable_device(pdev);
if (rc)
return rc;
rc = pci_request_regions(pdev, DRV_NAME);
if (rc) {
pci_dev_busy = 1;
goto err_out;
}
if (pci_enable_msi(pdev) == 0)
have_msi = 1;
else {
pci_intx(pdev, 1);
have_msi = 0;
}
probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
if (probe_ent == NULL) {
rc = -ENOMEM;
goto err_out_msi;
}
memset(probe_ent, 0, sizeof(*probe_ent));
probe_ent->dev = pci_dev_to_dev(pdev);
INIT_LIST_HEAD(&probe_ent->node);
mmio_base = pci_iomap(pdev, AHCI_PCI_BAR, 0);
if (mmio_base == NULL) {
rc = -ENOMEM;
goto err_out_free_ent;
}
base = (unsigned long) mmio_base;
hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
if (!hpriv) {
rc = -ENOMEM;
goto err_out_iounmap;
}
memset(hpriv, 0, sizeof(*hpriv));
probe_ent->sht = ahci_port_info[board_idx].sht;
probe_ent->port_flags = ahci_port_info[board_idx].flags;
probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
probe_ent->irq = pdev->irq;
probe_ent->irq_flags = IRQF_SHARED;
probe_ent->mmio_base = mmio_base;
probe_ent->private_data = hpriv;
if (have_msi)
hpriv->flags |= AHCI_FLAG_MSI;
/* initialize adapter */
rc = ahci_host_init(probe_ent);
if (rc)
goto err_out_hpriv;
if (!(probe_ent->port_flags & AHCI_FLAG_NO_NCQ) &&
(hpriv->cap & HOST_CAP_NCQ))
probe_ent->port_flags |= ATA_FLAG_NCQ;
ahci_print_info(probe_ent);
/* FIXME: check ata_device_add return value */
ata_device_add(probe_ent);
kfree(probe_ent);
return 0;
err_out_hpriv:
kfree(hpriv);
err_out_iounmap:
pci_iounmap(pdev, mmio_base);
err_out_free_ent:
kfree(probe_ent);
err_out_msi:
if (have_msi)
pci_disable_msi(pdev);
else
pci_intx(pdev, 0);
pci_release_regions(pdev);
err_out:
if (!pci_dev_busy)
pci_disable_device(pdev);
return rc;
}
static void ahci_remove_one (struct pci_dev *pdev)
{
struct device *dev = pci_dev_to_dev(pdev);
struct ata_host *host = dev_get_drvdata(dev);
struct ahci_host_priv *hpriv = host->private_data;
unsigned int i;
int have_msi;
for (i = 0; i < host->n_ports; i++)
ata_port_detach(host->ports[i]);
have_msi = hpriv->flags & AHCI_FLAG_MSI;
free_irq(host->irq, host);
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];
ata_scsi_release(ap->scsi_host);
scsi_host_put(ap->scsi_host);
}
kfree(hpriv);
pci_iounmap(pdev, host->mmio_base);
kfree(host);
if (have_msi)
pci_disable_msi(pdev);
else
pci_intx(pdev, 0);
pci_release_regions(pdev);
pci_disable_device(pdev);
dev_set_drvdata(dev, NULL);
}
static int __init ahci_init(void)
{
return pci_register_driver(&ahci_pci_driver);
}
static void __exit ahci_exit(void)
{
pci_unregister_driver(&ahci_pci_driver);
}
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("AHCI SATA low-level driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
MODULE_VERSION(DRV_VERSION);
module_init(ahci_init);
module_exit(ahci_exit);
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