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Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev 

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  AHCI: Remove an unnecessary flush from ahci_qc_issue
  AHCI: speed up resume
  [libata] Add support for VPD page b1
  ata: endianness annotations in pata drivers
  libata-eh: update atapi_eh_request_sense() to take @dev instead of @qc
  [libata] sata_svw: update code comments relating to data corruption
  libata/ahci: enclosure management support
  libata: improve EH internal command timeout handling
  libata: use ULONG_MAX to terminate reset timeout table
  libata: improve EH retry delay handling
  libata: consistently use msecs for time durations
This commit is contained in:
Linus Torvalds 2008-07-15 11:18:10 -07:00
parent dc221eae08 2640d7c0b8
commit b312bf359e
14 changed files with 716 additions and 134 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

331
drivers/ata/ahci.c
View File

@ -56,6 +56,12 @@ MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)
static int ahci_enable_alpm(struct ata_port *ap,
enum link_pm policy);
static void ahci_disable_alpm(struct ata_port *ap);
static ssize_t ahci_led_show(struct ata_port *ap, char *buf);
static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
size_t size);
static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
ssize_t size);
#define MAX_SLOTS 8
enum {
AHCI_PCI_BAR = 5,
@ -98,6 +104,8 @@ enum {
HOST_IRQ_STAT = 0x08, /* interrupt status */
HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
HOST_EM_LOC = 0x1c, /* Enclosure Management location */
HOST_EM_CTL = 0x20, /* Enclosure Management Control */
/* HOST_CTL bits */
HOST_RESET = (1 << 0), /* reset controller; self-clear */
@ -105,6 +113,7 @@ enum {
HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
/* HOST_CAP bits */
HOST_CAP_EMS = (1 << 6), /* Enclosure Management support */
HOST_CAP_SSC = (1 << 14), /* Slumber capable */
HOST_CAP_PMP = (1 << 17), /* Port Multiplier support */
HOST_CAP_CLO = (1 << 24), /* Command List Override support */
@ -202,6 +211,11 @@ enum {
ATA_FLAG_IPM,
ICH_MAP = 0x90, /* ICH MAP register */
/* em_ctl bits */
EM_CTL_RST = (1 << 9), /* Reset */
EM_CTL_TM = (1 << 8), /* Transmit Message */
EM_CTL_ALHD = (1 << 26), /* Activity LED */
};
struct ahci_cmd_hdr {
@ -219,12 +233,21 @@ struct ahci_sg {
__le32 flags_size;
};
struct ahci_em_priv {
enum sw_activity blink_policy;
struct timer_list timer;
unsigned long saved_activity;
unsigned long activity;
unsigned long led_state;
};
struct ahci_host_priv {
unsigned int flags; /* AHCI_HFLAG_* */
u32 cap; /* cap to use */
u32 port_map; /* port map to use */
u32 saved_cap; /* saved initial cap */
u32 saved_port_map; /* saved initial port_map */
u32 em_loc; /* enclosure management location */
};
struct ahci_port_priv {
@ -240,6 +263,8 @@ struct ahci_port_priv {
unsigned int ncq_saw_dmas:1;
unsigned int ncq_saw_sdb:1;
u32 intr_mask; /* interrupts to enable */
struct ahci_em_priv em_priv[MAX_SLOTS];/* enclosure management info
* per PM slot */
};
static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
@ -277,9 +302,20 @@ static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
static int ahci_pci_device_resume(struct pci_dev *pdev);
#endif
static ssize_t ahci_activity_show(struct ata_device *dev, char *buf);
static ssize_t ahci_activity_store(struct ata_device *dev,
enum sw_activity val);
static void ahci_init_sw_activity(struct ata_link *link);
static struct device_attribute *ahci_shost_attrs[] = {
&dev_attr_link_power_management_policy,
&dev_attr_em_message_type,
&dev_attr_em_message,
NULL
};
static struct device_attribute *ahci_sdev_attrs[] = {
&dev_attr_sw_activity,
NULL
};
@ -289,6 +325,7 @@ static struct scsi_host_template ahci_sht = {
.sg_tablesize = AHCI_MAX_SG,
.dma_boundary = AHCI_DMA_BOUNDARY,
.shost_attrs = ahci_shost_attrs,
.sdev_attrs = ahci_sdev_attrs,
};
static struct ata_port_operations ahci_ops = {
@ -316,6 +353,10 @@ static struct ata_port_operations ahci_ops = {
.enable_pm = ahci_enable_alpm,
.disable_pm = ahci_disable_alpm,
.em_show = ahci_led_show,
.em_store = ahci_led_store,
.sw_activity_show = ahci_activity_show,
.sw_activity_store = ahci_activity_store,
#ifdef CONFIG_PM
.port_suspend = ahci_port_suspend,
.port_resume = ahci_port_resume,
@ -561,6 +602,11 @@ static struct pci_driver ahci_pci_driver = {
#endif
};
static int ahci_em_messages = 1;
module_param(ahci_em_messages, int, 0444);
/* add other LED protocol types when they become supported */
MODULE_PARM_DESC(ahci_em_messages,
"Set AHCI Enclosure Management Message type (0 = disabled, 1 = LED");
static inline int ahci_nr_ports(u32 cap)
{
@ -1031,11 +1077,28 @@ static void ahci_power_down(struct ata_port *ap)
static void ahci_start_port(struct ata_port *ap)
{
struct ahci_port_priv *pp = ap->private_data;
struct ata_link *link;
struct ahci_em_priv *emp;
/* enable FIS reception */
ahci_start_fis_rx(ap);
/* enable DMA */
ahci_start_engine(ap);
/* turn on LEDs */
if (ap->flags & ATA_FLAG_EM) {
ata_port_for_each_link(link, ap) {
emp = &pp->em_priv[link->pmp];
ahci_transmit_led_message(ap, emp->led_state, 4);
}
}
if (ap->flags & ATA_FLAG_SW_ACTIVITY)
ata_port_for_each_link(link, ap)
ahci_init_sw_activity(link);
}
static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
@ -1079,12 +1142,15 @@ static int ahci_reset_controller(struct ata_host *host)
readl(mmio + HOST_CTL); /* flush */
}
/* reset must complete within 1 second, or
/*
* to perform host reset, OS should set HOST_RESET
* and poll until this bit is read to be "0".
* reset must complete within 1 second, or
* the hardware should be considered fried.
*/
ssleep(1);
tmp = ata_wait_register(mmio + HOST_CTL, HOST_RESET,
HOST_RESET, 10, 1000);
tmp = readl(mmio + HOST_CTL);
if (tmp & HOST_RESET) {
dev_printk(KERN_ERR, host->dev,
"controller reset failed (0x%x)\n", tmp);
@ -1116,6 +1182,230 @@ static int ahci_reset_controller(struct ata_host *host)
return 0;
}
static void ahci_sw_activity(struct ata_link *link)
{
struct ata_port *ap = link->ap;
struct ahci_port_priv *pp = ap->private_data;
struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
if (!(link->flags & ATA_LFLAG_SW_ACTIVITY))
return;
emp->activity++;
if (!timer_pending(&emp->timer))
mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10));
}
static void ahci_sw_activity_blink(unsigned long arg)
{
struct ata_link *link = (struct ata_link *)arg;
struct ata_port *ap = link->ap;
struct ahci_port_priv *pp = ap->private_data;
struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
unsigned long led_message = emp->led_state;
u32 activity_led_state;
led_message &= 0xffff0000;
led_message |= ap->port_no | (link->pmp << 8);
/* check to see if we've had activity. If so,
* toggle state of LED and reset timer. If not,
* turn LED to desired idle state.
*/
if (emp->saved_activity != emp->activity) {
emp->saved_activity = emp->activity;
/* get the current LED state */
activity_led_state = led_message & 0x00010000;
if (activity_led_state)
activity_led_state = 0;
else
activity_led_state = 1;
/* clear old state */
led_message &= 0xfff8ffff;
/* toggle state */
led_message |= (activity_led_state << 16);
mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100));
} else {
/* switch to idle */
led_message &= 0xfff8ffff;
if (emp->blink_policy == BLINK_OFF)
led_message |= (1 << 16);
}
ahci_transmit_led_message(ap, led_message, 4);
}
static void ahci_init_sw_activity(struct ata_link *link)
{
struct ata_port *ap = link->ap;
struct ahci_port_priv *pp = ap->private_data;
struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
/* init activity stats, setup timer */
emp->saved_activity = emp->activity = 0;
setup_timer(&emp->timer, ahci_sw_activity_blink, (unsigned long)link);
/* check our blink policy and set flag for link if it's enabled */
if (emp->blink_policy)
link->flags |= ATA_LFLAG_SW_ACTIVITY;
}
static int ahci_reset_em(struct ata_host *host)
{
void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
u32 em_ctl;
em_ctl = readl(mmio + HOST_EM_CTL);
if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST))
return -EINVAL;
writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
return 0;
}
static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
ssize_t size)
{
struct ahci_host_priv *hpriv = ap->host->private_data;
struct ahci_port_priv *pp = ap->private_data;
void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
u32 em_ctl;
u32 message[] = {0, 0};
unsigned int flags;
int pmp;
struct ahci_em_priv *emp;
/* get the slot number from the message */
pmp = (state & 0x0000ff00) >> 8;
if (pmp < MAX_SLOTS)
emp = &pp->em_priv[pmp];
else
return -EINVAL;
spin_lock_irqsave(ap->lock, flags);
/*
* if we are still busy transmitting a previous message,
* do not allow
*/
em_ctl = readl(mmio + HOST_EM_CTL);
if (em_ctl & EM_CTL_TM) {
spin_unlock_irqrestore(ap->lock, flags);
return -EINVAL;
}
/*
* create message header - this is all zero except for
* the message size, which is 4 bytes.
*/
message[0] |= (4 << 8);
/* ignore 0:4 of byte zero, fill in port info yourself */
message[1] = ((state & 0xfffffff0) | ap->port_no);
/* write message to EM_LOC */
writel(message[0], mmio + hpriv->em_loc);
writel(message[1], mmio + hpriv->em_loc+4);
/* save off new led state for port/slot */
emp->led_state = message[1];
/*
* tell hardware to transmit the message
*/
writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
spin_unlock_irqrestore(ap->lock, flags);
return size;
}
static ssize_t ahci_led_show(struct ata_port *ap, char *buf)
{
struct ahci_port_priv *pp = ap->private_data;
struct ata_link *link;
struct ahci_em_priv *emp;
int rc = 0;
ata_port_for_each_link(link, ap) {
emp = &pp->em_priv[link->pmp];
rc += sprintf(buf, "%lx\n", emp->led_state);
}
return rc;
}
static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
size_t size)
{
int state;
int pmp;
struct ahci_port_priv *pp = ap->private_data;
struct ahci_em_priv *emp;
state = simple_strtoul(buf, NULL, 0);
/* get the slot number from the message */
pmp = (state & 0x0000ff00) >> 8;
if (pmp < MAX_SLOTS)
emp = &pp->em_priv[pmp];
else
return -EINVAL;
/* mask off the activity bits if we are in sw_activity
* mode, user should turn off sw_activity before setting
* activity led through em_message
*/
if (emp->blink_policy)
state &= 0xfff8ffff;
return ahci_transmit_led_message(ap, state, size);
}
static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
{
struct ata_link *link = dev->link;
struct ata_port *ap = link->ap;
struct ahci_port_priv *pp = ap->private_data;
struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
u32 port_led_state = emp->led_state;
/* save the desired Activity LED behavior */
if (val == OFF) {
/* clear LFLAG */
link->flags &= ~(ATA_LFLAG_SW_ACTIVITY);
/* set the LED to OFF */
port_led_state &= 0xfff80000;
port_led_state |= (ap->port_no | (link->pmp << 8));
ahci_transmit_led_message(ap, port_led_state, 4);
} else {
link->flags |= ATA_LFLAG_SW_ACTIVITY;
if (val == BLINK_OFF) {
/* set LED to ON for idle */
port_led_state &= 0xfff80000;
port_led_state |= (ap->port_no | (link->pmp << 8));
port_led_state |= 0x00010000; /* check this */
ahci_transmit_led_message(ap, port_led_state, 4);
}
}
emp->blink_policy = val;
return 0;
}
static ssize_t ahci_activity_show(struct ata_device *dev, char *buf)
{
struct ata_link *link = dev->link;
struct ata_port *ap = link->ap;
struct ahci_port_priv *pp = ap->private_data;
struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
/* display the saved value of activity behavior for this
* disk.
*/
return sprintf(buf, "%d\n", emp->blink_policy);
}
static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
int port_no, void __iomem *mmio,
void __iomem *port_mmio)
@ -1846,7 +2136,8 @@ static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
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 */
ahci_sw_activity(qc->dev->link);
return 0;
}
@ -2154,7 +2445,8 @@ static void ahci_print_info(struct ata_host *host)
dev_printk(KERN_INFO, &pdev->dev,
"flags: "
"%s%s%s%s%s%s%s"
"%s%s%s%s%s%s%s\n"
"%s%s%s%s%s%s%s"
"%s\n"
,
cap & (1 << 31) ? "64bit " : "",
@ -2171,7 +2463,8 @@ static void ahci_print_info(struct ata_host *host)
cap & (1 << 17) ? "pmp " : "",
cap & (1 << 15) ? "pio " : "",
cap & (1 << 14) ? "slum " : "",
cap & (1 << 13) ? "part " : ""
cap & (1 << 13) ? "part " : "",
cap & (1 << 6) ? "ems ": ""
);
}
@ -2291,6 +2584,24 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if (hpriv->cap & HOST_CAP_PMP)
pi.flags |= ATA_FLAG_PMP;
if (ahci_em_messages && (hpriv->cap & HOST_CAP_EMS)) {
u8 messages;
void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
u32 em_loc = readl(mmio + HOST_EM_LOC);
u32 em_ctl = readl(mmio + HOST_EM_CTL);
messages = (em_ctl & 0x000f0000) >> 16;
/* we only support LED message type right now */
if ((messages & 0x01) && (ahci_em_messages == 1)) {
/* store em_loc */
hpriv->em_loc = ((em_loc >> 16) * 4);
pi.flags |= ATA_FLAG_EM;
if (!(em_ctl & EM_CTL_ALHD))
pi.flags |= ATA_FLAG_SW_ACTIVITY;
}
}
/* CAP.NP sometimes indicate the index of the last enabled
* port, at other times, that of the last possible port, so
* determining the maximum port number requires looking at
@ -2304,6 +2615,9 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
host->iomap = pcim_iomap_table(pdev);
host->private_data = hpriv;
if (pi.flags & ATA_FLAG_EM)
ahci_reset_em(host);
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];
@ -2314,6 +2628,11 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
/* set initial link pm policy */
ap->pm_policy = NOT_AVAILABLE;
/* set enclosure management message type */
if (ap->flags & ATA_FLAG_EM)
ap->em_message_type = ahci_em_messages;
/* disabled/not-implemented port */
if (!(hpriv->port_map & (1 << i)))
ap->ops = &ata_dummy_port_ops;

56
drivers/ata/libata-core.c
View File

@ -54,7 +54,6 @@
#include <linux/completion.h>
#include <linux/suspend.h>
#include <linux/workqueue.h>
#include <linux/jiffies.h>
#include <linux/scatterlist.h>
#include <linux/io.h>
#include <scsi/scsi.h>
@ -145,7 +144,7 @@ static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CF
module_param_named(dma, libata_dma_mask, int, 0444);
MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
static int ata_probe_timeout;
module_param(ata_probe_timeout, int, 0444);
MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
@ -1533,7 +1532,7 @@ unsigned long ata_id_xfermask(const u16 *id)
* @ap: The ata_port to queue port_task for
* @fn: workqueue function to be scheduled
* @data: data for @fn to use
* @delay: delay time for workqueue function
* @delay: delay time in msecs for workqueue function
*
* Schedule @fn(@data) for execution after @delay jiffies using
* port_task. There is one port_task per port and it's the
@ -1552,7 +1551,7 @@ void ata_pio_queue_task(struct ata_port *ap, void *data, unsigned long delay)
ap->port_task_data = data;
/* may fail if ata_port_flush_task() in progress */
queue_delayed_work(ata_wq, &ap->port_task, delay);
queue_delayed_work(ata_wq, &ap->port_task, msecs_to_jiffies(delay));
}
/**
@ -1612,6 +1611,7 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
struct ata_link *link = dev->link;
struct ata_port *ap = link->ap;
u8 command = tf->command;
int auto_timeout = 0;
struct ata_queued_cmd *qc;
unsigned int tag, preempted_tag;
u32 preempted_sactive, preempted_qc_active;
@ -1684,8 +1684,14 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
spin_unlock_irqrestore(ap->lock, flags);
if (!timeout)
timeout = ata_probe_timeout * 1000 / HZ;
if (!timeout) {
if (ata_probe_timeout)
timeout = ata_probe_timeout * 1000;
else {
timeout = ata_internal_cmd_timeout(dev, command);
auto_timeout = 1;
}
}
rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
@ -1761,6 +1767,9 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
spin_unlock_irqrestore(ap->lock, flags);
if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
ata_internal_cmd_timed_out(dev, command);
return err_mask;
}
@ -3319,7 +3328,7 @@ int ata_wait_ready(struct ata_link *link, unsigned long deadline,
int (*check_ready)(struct ata_link *link))
{
unsigned long start = jiffies;
unsigned long nodev_deadline = start + ATA_TMOUT_FF_WAIT;
unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
int warned = 0;
if (time_after(nodev_deadline, deadline))
@ -3387,7 +3396,7 @@ int ata_wait_ready(struct ata_link *link, unsigned long deadline,
int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
int (*check_ready)(struct ata_link *link))
{
msleep(ATA_WAIT_AFTER_RESET_MSECS);
msleep(ATA_WAIT_AFTER_RESET);
return ata_wait_ready(link, deadline, check_ready);
}
@ -3417,13 +3426,13 @@ int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
int sata_link_debounce(struct ata_link *link, const unsigned long *params,
unsigned long deadline)
{
unsigned long interval_msec = params[0];
unsigned long duration = msecs_to_jiffies(params[1]);
unsigned long interval = params[0];
unsigned long duration = params[1];
unsigned long last_jiffies, t;
u32 last, cur;
int rc;
t = jiffies + msecs_to_jiffies(params[2]);
t = ata_deadline(jiffies, params[2]);
if (time_before(t, deadline))
deadline = t;
@ -3435,7 +3444,7 @@ int sata_link_debounce(struct ata_link *link, const unsigned long *params,
last_jiffies = jiffies;
while (1) {
msleep(interval_msec);
msleep(interval);
if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
return rc;
cur &= 0xf;
@ -3444,7 +3453,8 @@ int sata_link_debounce(struct ata_link *link, const unsigned long *params,
if (cur == last) {
if (cur == 1 && time_before(jiffies, deadline))
continue;
if (time_after(jiffies, last_jiffies + duration))
if (time_after(jiffies,
ata_deadline(last_jiffies, duration)))
return 0;
continue;
}
@ -3636,7 +3646,8 @@ int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
if (check_ready) {
unsigned long pmp_deadline;
pmp_deadline = jiffies + ATA_TMOUT_PMP_SRST_WAIT;
pmp_deadline = ata_deadline(jiffies,
ATA_TMOUT_PMP_SRST_WAIT);
if (time_after(pmp_deadline, deadline))
pmp_deadline = deadline;
ata_wait_ready(link, pmp_deadline, check_ready);
@ -6073,8 +6084,6 @@ static void __init ata_parse_force_param(void)
static int __init ata_init(void)
{
ata_probe_timeout *= HZ;
ata_parse_force_param();
ata_wq = create_workqueue("ata");
@ -6127,8 +6136,8 @@ int ata_ratelimit(void)
* @reg: IO-mapped register
* @mask: Mask to apply to read register value
* @val: Wait condition
* @interval_msec: polling interval in milliseconds
* @timeout_msec: timeout in milliseconds
* @interval: polling interval in milliseconds
* @timeout: timeout in milliseconds
*
* Waiting for some bits of register to change is a common
* operation for ATA controllers. This function reads 32bit LE
@ -6146,10 +6155,9 @@ int ata_ratelimit(void)
* The final register value.
*/
u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
unsigned long interval_msec,
unsigned long timeout_msec)
unsigned long interval, unsigned long timeout)
{
unsigned long timeout;
unsigned long deadline;
u32 tmp;
tmp = ioread32(reg);
@ -6158,10 +6166,10 @@ u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
* preceding writes reach the controller before starting to
* eat away the timeout.
*/
timeout = jiffies + (timeout_msec * HZ) / 1000;
deadline = ata_deadline(jiffies, timeout);
while ((tmp & mask) == val && time_before(jiffies, timeout)) {
msleep(interval_msec);
while ((tmp & mask) == val && time_before(jiffies, deadline)) {
msleep(interval);
tmp = ioread32(reg);
}

219
drivers/ata/libata-eh.c
View File

@ -66,15 +66,19 @@ enum {
ATA_ECAT_DUBIOUS_TOUT_HSM = 6,
ATA_ECAT_DUBIOUS_UNK_DEV = 7,
ATA_ECAT_NR = 8,
};
/* Waiting in ->prereset can never be reliable. It's sometimes nice
* to wait there but it can't be depended upon; otherwise, we wouldn't
* be resetting. Just give it enough time for most drives to spin up.
*/
enum {
ATA_EH_PRERESET_TIMEOUT = 10 * HZ,
ATA_EH_FASTDRAIN_INTERVAL = 3 * HZ,
ATA_EH_CMD_DFL_TIMEOUT = 5000,
/* always put at least this amount of time between resets */
ATA_EH_RESET_COOL_DOWN = 5000,
/* Waiting in ->prereset can never be reliable. It's
* sometimes nice to wait there but it can't be depended upon;
* otherwise, we wouldn't be resetting. Just give it enough
* time for most drives to spin up.
*/
ATA_EH_PRERESET_TIMEOUT = 10000,
ATA_EH_FASTDRAIN_INTERVAL = 3000,
};
/* The following table determines how we sequence resets. Each entry
@ -84,13 +88,60 @@ enum {
* are mostly for error handling, hotplug and retarded devices.
*/
static const unsigned long ata_eh_reset_timeouts[] = {
10 * HZ, /* most drives spin up by 10sec */
10 * HZ, /* > 99% working drives spin up before 20sec */
35 * HZ, /* give > 30 secs of idleness for retarded devices */
5 * HZ, /* and sweet one last chance */
/* > 1 min has elapsed, give up */
10000, /* most drives spin up by 10sec */
10000, /* > 99% working drives spin up before 20sec */
35000, /* give > 30 secs of idleness for retarded devices */
5000, /* and sweet one last chance */
ULONG_MAX, /* > 1 min has elapsed, give up */
};
static const unsigned long ata_eh_identify_timeouts[] = {
5000, /* covers > 99% of successes and not too boring on failures */
10000, /* combined time till here is enough even for media access */
30000, /* for true idiots */
ULONG_MAX,
};
static const unsigned long ata_eh_other_timeouts[] = {
5000, /* same rationale as identify timeout */
10000, /* ditto */
/* but no merciful 30sec for other commands, it just isn't worth it */
ULONG_MAX,
};
struct ata_eh_cmd_timeout_ent {
const u8 *commands;
const unsigned long *timeouts;
};
/* The following table determines timeouts to use for EH internal
* commands. Each table entry is a command class and matches the
* commands the entry applies to and the timeout table to use.
*
* On the retry after a command timed out, the next timeout value from
* the table is used. If the table doesn't contain further entries,
* the last value is used.
*
* ehc->cmd_timeout_idx keeps track of which timeout to use per
* command class, so if SET_FEATURES times out on the first try, the
* next try will use the second timeout value only for that class.
*/
#define CMDS(cmds...) (const u8 []){ cmds, 0 }
static const struct ata_eh_cmd_timeout_ent
ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = {
{ .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI),
.timeouts = ata_eh_identify_timeouts, },
{ .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT),
.timeouts = ata_eh_other_timeouts, },
{ .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT),
.timeouts = ata_eh_other_timeouts, },
{ .commands = CMDS(ATA_CMD_SET_FEATURES),
.timeouts = ata_eh_other_timeouts, },
{ .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS),
.timeouts = ata_eh_other_timeouts, },
};
#undef CMDS
static void __ata_port_freeze(struct ata_port *ap);
#ifdef CONFIG_PM
static void ata_eh_handle_port_suspend(struct ata_port *ap);
@ -236,6 +287,73 @@ void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
#endif /* CONFIG_PCI */
static int ata_lookup_timeout_table(u8 cmd)
{
int i;
for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) {
const u8 *cur;
for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++)
if (*cur == cmd)
return i;
}
return -1;
}
/**
* ata_internal_cmd_timeout - determine timeout for an internal command
* @dev: target device
* @cmd: internal command to be issued
*
* Determine timeout for internal command @cmd for @dev.
*
* LOCKING:
* EH context.
*
* RETURNS:
* Determined timeout.
*/
unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd)
{
struct ata_eh_context *ehc = &dev->link->eh_context;
int ent = ata_lookup_timeout_table(cmd);
int idx;
if (ent < 0)
return ATA_EH_CMD_DFL_TIMEOUT;
idx = ehc->cmd_timeout_idx[dev->devno][ent];
return ata_eh_cmd_timeout_table[ent].timeouts[idx];
}
/**
* ata_internal_cmd_timed_out - notification for internal command timeout
* @dev: target device
* @cmd: internal command which timed out
*
* Notify EH that internal command @cmd for @dev timed out. This
* function should be called only for commands whose timeouts are
* determined using ata_internal_cmd_timeout().
*
* LOCKING:
* EH context.
*/
void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd)
{
struct ata_eh_context *ehc = &dev->link->eh_context;
int ent = ata_lookup_timeout_table(cmd);
int idx;
if (ent < 0)
return;
idx = ehc->cmd_timeout_idx[dev->devno][ent];
if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX)
ehc->cmd_timeout_idx[dev->devno][ent]++;
}
static void ata_ering_record(struct ata_ering *ering, unsigned int eflags,
unsigned int err_mask)
{
@ -486,6 +604,9 @@ void ata_scsi_error(struct Scsi_Host *host)
if (ata_ncq_enabled(dev))
ehc->saved_ncq_enabled |= 1 << devno;
}
/* set last reset timestamp to some time in the past */
ehc->last_reset = jiffies - 60 * HZ;
}
ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS;
@ -641,7 +762,7 @@ void ata_eh_fastdrain_timerfn(unsigned long arg)
/* some qcs have finished, give it another chance */
ap->fastdrain_cnt = cnt;
ap->fastdrain_timer.expires =
jiffies + ATA_EH_FASTDRAIN_INTERVAL;
ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL);
add_timer(&ap->fastdrain_timer);
}
@ -681,7 +802,8 @@ static void ata_eh_set_pending(struct ata_port *ap, int fastdrain)
/* activate fast drain */
ap->fastdrain_cnt = cnt;
ap->fastdrain_timer.expires = jiffies + ATA_EH_FASTDRAIN_INTERVAL;
ap->fastdrain_timer.expires =
ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL);
add_timer(&ap->fastdrain_timer);
}
@ -1238,6 +1360,7 @@ static int ata_eh_read_log_10h(struct ata_device *dev,
* atapi_eh_request_sense - perform ATAPI REQUEST_SENSE
* @dev: device to perform REQUEST_SENSE to
* @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long)
* @dfl_sense_key: default sense key to use
*
* Perform ATAPI REQUEST_SENSE after the device reported CHECK
* SENSE. This function is EH helper.
@ -1248,13 +1371,13 @@ static int ata_eh_read_log_10h(struct ata_device *dev,
* RETURNS:
* 0 on success, AC_ERR_* mask on failure
*/
static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc)
static unsigned int atapi_eh_request_sense(struct ata_device *dev,
u8 *sense_buf, u8 dfl_sense_key)
{
struct ata_device *dev = qc->dev;
unsigned char *sense_buf = qc->scsicmd->sense_buffer;
u8 cdb[ATAPI_CDB_LEN] =
{ REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 };
struct ata_port *ap = dev->link->ap;
struct ata_taskfile tf;
u8 cdb[ATAPI_CDB_LEN];
DPRINTK("ATAPI request sense\n");
@ -1265,15 +1388,11 @@ static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc)
* for the case where they are -not- overwritten
*/
sense_buf[0] = 0x70;
sense_buf[2] = qc->result_tf.feature >> 4;
sense_buf[2] = dfl_sense_key;
/* some devices time out if garbage left in tf */
ata_tf_init(dev, &tf);
memset(cdb, 0, ATAPI_CDB_LEN);
cdb[0] = REQUEST_SENSE;
cdb[4] = SCSI_SENSE_BUFFERSIZE;
tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
tf.command = ATA_CMD_PACKET;
@ -1445,7 +1564,9 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc,
case ATA_DEV_ATAPI:
if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) {
tmp = atapi_eh_request_sense(qc);
tmp = atapi_eh_request_sense(qc->dev,
qc->scsicmd->sense_buffer,
qc->result_tf.feature >> 4);
if (!tmp) {
/* ATA_QCFLAG_SENSE_VALID is used to
* tell atapi_qc_complete() that sense
@ -2071,13 +2192,12 @@ int ata_eh_reset(struct ata_link *link, int classify,
ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
{
const int max_tries = ARRAY_SIZE(ata_eh_reset_timeouts);
struct ata_port *ap = link->ap;
struct ata_eh_context *ehc = &link->eh_context;
unsigned int *classes = ehc->classes;
unsigned int lflags = link->flags;
int verbose = !(ehc->i.flags & ATA_EHI_QUIET);
int try = 0;
int max_tries = 0, try = 0;
struct ata_device *dev;
unsigned long deadline, now;
ata_reset_fn_t reset;
@ -2088,11 +2208,20 @@ int ata_eh_reset(struct ata_link *link, int classify,
/*
* Prepare to reset
*/
while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX)
max_tries++;
now = jiffies;
deadline = ata_deadline(ehc->last_reset, ATA_EH_RESET_COOL_DOWN);
if (time_before(now, deadline))
schedule_timeout_uninterruptible(deadline - now);
spin_lock_irqsave(ap->lock, flags);
ap->pflags |= ATA_PFLAG_RESETTING;
spin_unlock_irqrestore(ap->lock, flags);
ata_eh_about_to_do(link, NULL, ATA_EH_RESET);
ehc->last_reset = jiffies;
ata_link_for_each_dev(dev, link) {
/* If we issue an SRST then an ATA drive (not ATAPI)
@ -2125,7 +2254,8 @@ int ata_eh_reset(struct ata_link *link, int classify,
}
if (prereset) {
rc = prereset(link, jiffies + ATA_EH_PRERESET_TIMEOUT);
rc = prereset(link,
ata_deadline(jiffies, ATA_EH_PRERESET_TIMEOUT));
if (rc) {
if (rc == -ENOENT) {
ata_link_printk(link, KERN_DEBUG,
@ -2157,10 +2287,11 @@ int ata_eh_reset(struct ata_link *link, int classify,
/*
* Perform reset
*/
ehc->last_reset = jiffies;
if (ata_is_host_link(link))
ata_eh_freeze_port(ap);
deadline = jiffies + ata_eh_reset_timeouts[try++];
deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]);
if (reset) {
if (verbose)
@ -2277,6 +2408,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
/* reset successful, schedule revalidation */
ata_eh_done(link, NULL, ATA_EH_RESET);
ehc->last_reset = jiffies;
ehc->i.action |= ATA_EH_REVALIDATE;
rc = 0;
@ -2303,9 +2435,9 @@ int ata_eh_reset(struct ata_link *link, int classify,
if (time_before(now, deadline)) {
unsigned long delta = deadline - now;
ata_link_printk(link, KERN_WARNING, "reset failed "
"(errno=%d), retrying in %u secs\n",
rc, (jiffies_to_msecs(delta) + 999) / 1000);
ata_link_printk(link, KERN_WARNING,
"reset failed (errno=%d), retrying in %u secs\n",
rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000));
while (delta)
delta = schedule_timeout_uninterruptible(delta);
@ -2583,8 +2715,11 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err)
ata_eh_detach_dev(dev);
/* schedule probe if necessary */
if (ata_eh_schedule_probe(dev))
if (ata_eh_schedule_probe(dev)) {
ehc->tries[dev->devno] = ATA_EH_DEV_TRIES;
memset(ehc->cmd_timeout_idx[dev->devno], 0,
sizeof(ehc->cmd_timeout_idx[dev->devno]));
}
return 1;
} else {
@ -2622,7 +2757,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
{
struct ata_link *link;
struct ata_device *dev;
int nr_failed_devs, nr_disabled_devs;
int nr_failed_devs;
int rc;
unsigned long flags;
@ -2665,7 +2800,6 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
retry:
rc = 0;
nr_failed_devs = 0;
nr_disabled_devs = 0;
/* if UNLOADING, finish immediately */
if (ap->pflags & ATA_PFLAG_UNLOADING)
@ -2732,8 +2866,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
dev_fail:
nr_failed_devs++;
if (ata_eh_handle_dev_fail(dev, rc))
nr_disabled_devs++;
ata_eh_handle_dev_fail(dev, rc);
if (ap->pflags & ATA_PFLAG_FROZEN) {
/* PMP reset requires working host port.
@ -2745,18 +2878,8 @@ dev_fail:
}
}
if (nr_failed_devs) {
if (nr_failed_devs != nr_disabled_devs) {
ata_port_printk(ap, KERN_WARNING, "failed to recover "
"some devices, retrying in 5 secs\n");
ssleep(5);
} else {
/* no device left to recover, repeat fast */
msleep(500);
}
if (nr_failed_devs)
goto retry;
}
out:
if (rc && r_failed_link)

13
drivers/ata/libata-pmp.c
View File

@ -727,19 +727,12 @@ static int sata_pmp_eh_recover_pmp(struct ata_port *ap,
}
if (tries) {
int sleep = ehc->i.flags & ATA_EHI_DID_RESET;
/* consecutive revalidation failures? speed down */
if (reval_failed)
sata_down_spd_limit(link);
else
reval_failed = 1;
ata_dev_printk(dev, KERN_WARNING,
"retrying reset%s\n",
sleep ? " in 5 secs" : "");
if (sleep)
ssleep(5);
ehc->i.action |= ATA_EH_RESET;
goto retry;
} else {
@ -785,7 +778,8 @@ static int sata_pmp_eh_handle_disabled_links(struct ata_port *ap)
* SError.N working.
*/
sata_link_hardreset(link, sata_deb_timing_normal,
jiffies + ATA_TMOUT_INTERNAL_QUICK, NULL, NULL);
ata_deadline(jiffies, ATA_TMOUT_INTERNAL_QUICK),
NULL, NULL);
/* unconditionally clear SError.N */
rc = sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
@ -990,10 +984,7 @@ static int sata_pmp_eh_recover(struct ata_port *ap)
goto retry;
if (--pmp_tries) {
ata_port_printk(ap, KERN_WARNING,
"failed to recover PMP, retrying in 5 secs\n");
pmp_ehc->i.action |= ATA_EH_RESET;
ssleep(5);
goto retry;
}

99
drivers/ata/libata-scsi.c
View File

@ -190,6 +190,85 @@ static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
}
static ssize_t
ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct Scsi_Host *shost = class_to_shost(dev);
struct ata_port *ap = ata_shost_to_port(shost);
if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
return ap->ops->em_store(ap, buf, count);
return -EINVAL;
}
static ssize_t
ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct Scsi_Host *shost = class_to_shost(dev);
struct ata_port *ap = ata_shost_to_port(shost);
if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
return ap->ops->em_show(ap, buf);
return -EINVAL;
}
DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO,
ata_scsi_em_message_show, ata_scsi_em_message_store);
EXPORT_SYMBOL_GPL(dev_attr_em_message);
static ssize_t
ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct Scsi_Host *shost = class_to_shost(dev);
struct ata_port *ap = ata_shost_to_port(shost);
return snprintf(buf, 23, "%d\n", ap->em_message_type);
}
DEVICE_ATTR(em_message_type, S_IRUGO,
ata_scsi_em_message_type_show, NULL);
EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
static ssize_t
ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
struct ata_port *ap = ata_shost_to_port(sdev->host);
struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
return ap->ops->sw_activity_show(atadev, buf);
return -EINVAL;
}
static ssize_t
ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct scsi_device *sdev = to_scsi_device(dev);
struct ata_port *ap = ata_shost_to_port(sdev->host);
struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
enum sw_activity val;
int rc;
if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
val = simple_strtoul(buf, NULL, 0);
switch (val) {
case OFF: case BLINK_ON: case BLINK_OFF:
rc = ap->ops->sw_activity_store(atadev, val);
if (!rc)
return count;
else
return rc;
}
}
return -EINVAL;
}
DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
ata_scsi_activity_store);
EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *))
{
@ -1779,7 +1858,9 @@ static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
const u8 pages[] = {
0x00, /* page 0x00, this page */
0x80, /* page 0x80, unit serial no page */
0x83 /* page 0x83, device ident page */
0x83, /* page 0x83, device ident page */
0x89, /* page 0x89, ata info page */
0xb1, /* page 0xb1, block device characteristics page */
};
rbuf[3] = sizeof(pages); /* number of supported VPD pages */
@ -1900,6 +1981,19 @@ static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
return 0;
}
static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
{
rbuf[1] = 0xb1;
rbuf[3] = 0x3c;
if (ata_id_major_version(args->id) > 7) {
rbuf[4] = args->id[217] >> 8;
rbuf[5] = args->id[217];
rbuf[7] = args->id[168] & 0xf;
}
return 0;
}
/**
* ata_scsiop_noop - Command handler that simply returns success.
* @args: device IDENTIFY data / SCSI command of interest.
@ -2921,6 +3015,9 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
case 0x89:
ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
break;
case 0xb1:
ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
break;
default:
ata_scsi_invalid_field(cmd, done);
break;

15
drivers/ata/libata-sff.c
View File

@ -345,8 +345,8 @@ void ata_sff_dma_pause(struct ata_port *ap)
/**
* ata_sff_busy_sleep - sleep until BSY clears, or timeout
* @ap: port containing status register to be polled
* @tmout_pat: impatience timeout
* @tmout: overall timeout
* @tmout_pat: impatience timeout in msecs
* @tmout: overall timeout in msecs
*
* Sleep until ATA Status register bit BSY clears,
* or a timeout occurs.
@ -365,7 +365,7 @@ int ata_sff_busy_sleep(struct ata_port *ap,
status = ata_sff_busy_wait(ap, ATA_BUSY, 300);
timer_start = jiffies;
timeout = timer_start + tmout_pat;
timeout = ata_deadline(timer_start, tmout_pat);
while (status != 0xff && (status & ATA_BUSY) &&
time_before(jiffies, timeout)) {
msleep(50);
@ -377,7 +377,7 @@ int ata_sff_busy_sleep(struct ata_port *ap,
"port is slow to respond, please be patient "
"(Status 0x%x)\n", status);
timeout = timer_start + tmout;
timeout = ata_deadline(timer_start, tmout);
while (status != 0xff && (status & ATA_BUSY) &&
time_before(jiffies, timeout)) {
msleep(50);
@ -390,7 +390,7 @@ int ata_sff_busy_sleep(struct ata_port *ap,
if (status & ATA_BUSY) {
ata_port_printk(ap, KERN_ERR, "port failed to respond "
"(%lu secs, Status 0x%x)\n",
tmout / HZ, status);
DIV_ROUND_UP(tmout, 1000), status);
return -EBUSY;
}
@ -1888,7 +1888,7 @@ int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
unsigned int dev1 = devmask & (1 << 1);
int rc, ret = 0;
msleep(ATA_WAIT_AFTER_RESET_MSECS);
msleep(ATA_WAIT_AFTER_RESET);
/* always check readiness of the master device */
rc = ata_sff_wait_ready(link, deadline);
@ -2371,7 +2371,8 @@ void ata_bus_reset(struct ata_port *ap)
/* issue bus reset */
if (ap->flags & ATA_FLAG_SRST) {
rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ);
rc = ata_bus_softreset(ap, devmask,
ata_deadline(jiffies, 40000));
if (rc && rc != -ENODEV)
goto err_out;
}

2
drivers/ata/libata.h
View File

@ -151,6 +151,8 @@ extern void ata_scsi_dev_rescan(struct work_struct *work);
extern int ata_bus_probe(struct ata_port *ap);
/* libata-eh.c */
extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd);
extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd);
extern enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
extern void ata_scsi_error(struct Scsi_Host *host);
extern void ata_port_wait_eh(struct ata_port *ap);

6
drivers/ata/pata_bf54x.c
View File

@ -1011,7 +1011,7 @@ static void bfin_bus_post_reset(struct ata_port *ap, unsigned int devmask)
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
unsigned int dev0 = devmask & (1 << 0);
unsigned int dev1 = devmask & (1 << 1);
unsigned long timeout;
unsigned long deadline;
/* if device 0 was found in ata_devchk, wait for its
* BSY bit to clear
@ -1022,7 +1022,7 @@ static void bfin_bus_post_reset(struct ata_port *ap, unsigned int devmask)
/* if device 1 was found in ata_devchk, wait for
* register access, then wait for BSY to clear
*/
timeout = jiffies + ATA_TMOUT_BOOT;
deadline = ata_deadline(jiffies, ATA_TMOUT_BOOT);
while (dev1) {
u8 nsect, lbal;
@ -1031,7 +1031,7 @@ static void bfin_bus_post_reset(struct ata_port *ap, unsigned int devmask)
lbal = read_atapi_register(base, ATA_REG_LBAL);
if ((nsect == 1) && (lbal == 1))
break;
if (time_after(jiffies, timeout)) {
if (time_after(jiffies, deadline)) {
dev1 = 0;
break;
}

10
drivers/ata/pata_legacy.c
View File

@ -305,7 +305,7 @@ static unsigned int pdc_data_xfer_vlb(struct ata_device *dev,
iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
if (unlikely(slop)) {
u32 pad;
__le32 pad;
if (rw == READ) {
pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
memcpy(buf + buflen - slop, &pad, slop);
@ -746,14 +746,12 @@ static unsigned int vlb32_data_xfer(struct ata_device *adev, unsigned char *buf,
ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
if (unlikely(slop)) {
u32 pad;
__le32 pad;
if (rw == WRITE) {
memcpy(&pad, buf + buflen - slop, slop);
pad = le32_to_cpu(pad);
iowrite32(pad, ap->ioaddr.data_addr);
iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
} else {
pad = ioread32(ap->ioaddr.data_addr);
pad = cpu_to_le32(pad);
pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
memcpy(buf + buflen - slop, &pad, slop);
}
}

2
drivers/ata/pata_qdi.c
View File

@ -137,7 +137,7 @@ static unsigned int qdi_data_xfer(struct ata_device *dev, unsigned char *buf,
iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
if (unlikely(slop)) {
u32 pad;
__le32 pad;
if (rw == READ) {
pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
memcpy(buf + buflen - slop, &pad, slop);

2
drivers/ata/pata_scc.c
View File

@ -696,7 +696,7 @@ static void scc_bmdma_stop (struct ata_queued_cmd *qc)
if (reg & INTSTS_BMSINT) {
unsigned int classes;
unsigned long deadline = jiffies + ATA_TMOUT_BOOT;
unsigned long deadline = ata_deadline(jiffies, ATA_TMOUT_BOOT);
printk(KERN_WARNING "%s: Internal Bus Error\n", DRV_NAME);
out_be32(bmid_base + SCC_DMA_INTST, INTSTS_BMSINT);
/* TBD: SW reset */

2
drivers/ata/pata_winbond.c
View File

@ -105,7 +105,7 @@ static unsigned int winbond_data_xfer(struct ata_device *dev,
iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
if (unlikely(slop)) {
u32 pad;
__le32 pad;
if (rw == READ) {
pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
memcpy(buf + buflen - slop, &pad, slop);

38
drivers/ata/sata_svw.c
View File

@ -253,21 +253,29 @@ static void k2_bmdma_start_mmio(struct ata_queued_cmd *qc)
/* start host DMA transaction */
dmactl = readb(mmio + ATA_DMA_CMD);
writeb(dmactl | ATA_DMA_START, mmio + ATA_DMA_CMD);
/* There is a race condition in certain SATA controllers that can
be seen when the r/w command is given to the controller before the
host DMA is started. On a Read command, the controller would initiate
the command to the drive even before it sees the DMA start. When there
are very fast drives connected to the controller, or when the data request
hits in the drive cache, there is the possibility that the drive returns a part
or all of the requested data to the controller before the DMA start is issued.
In this case, the controller would become confused as to what to do with the data.
In the worst case when all the data is returned back to the controller, the
controller could hang. In other cases it could return partial data returning
in data corruption. This problem has been seen in PPC systems and can also appear
on an system with very fast disks, where the SATA controller is sitting behind a
number of bridges, and hence there is significant latency between the r/w command
and the start command. */
/* issue r/w command if the access is to ATA*/
/* This works around possible data corruption.
On certain SATA controllers that can be seen when the r/w
command is given to the controller before the host DMA is
started.
On a Read command, the controller would initiate the
command to the drive even before it sees the DMA
start. When there are very fast drives connected to the
controller, or when the data request hits in the drive
cache, there is the possibility that the drive returns a
part or all of the requested data to the controller before
the DMA start is issued. In this case, the controller
would become confused as to what to do with the data. In
the worst case when all the data is returned back to the
controller, the controller could hang. In other cases it
could return partial data returning in data
corruption. This problem has been seen in PPC systems and
can also appear on an system with very fast disks, where
the SATA controller is sitting behind a number of bridges,
and hence there is significant latency between the r/w
command and the start command. */
/* issue r/w command if the access is to ATA */
if (qc->tf.protocol == ATA_PROT_DMA)
ap->ops->sff_exec_command(ap, &qc->tf);
}

55
include/linux/libata.h
View File

@ -27,6 +27,7 @@
#define __LINUX_LIBATA_H__
#include <linux/delay.h>
#include <linux/jiffies.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
@ -115,7 +116,7 @@ enum {
/* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
ATA_MAX_QUEUE = 32,
ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
ATA_SHORT_PAUSE = (HZ >> 6) + 1,
ATA_SHORT_PAUSE = 16,
ATAPI_MAX_DRAIN = 16 << 10,
@ -168,6 +169,7 @@ enum {
ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
/* struct ata_port flags */
ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
@ -190,6 +192,10 @@ enum {
ATA_FLAG_AN = (1 << 18), /* controller supports AN */
ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
* management */
ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
* led */
/* The following flag belongs to ap->pflags but is kept in
* ap->flags because it's referenced in many LLDs and will be
@ -234,17 +240,16 @@ enum {
/* bits 24:31 of host->flags are reserved for LLD specific flags */
/* various lengths of time */
ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
ATA_TMOUT_INTERNAL = 30 * HZ,
ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
ATA_TMOUT_BOOT = 30000, /* heuristic */
ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
ATA_TMOUT_INTERNAL_QUICK = 5000,
/* FIXME: GoVault needs 2s but we can't afford that without
* parallel probing. 800ms is enough for iVDR disk
* HHD424020F7SV00. Increase to 2secs when parallel probing
* is in place.
*/
ATA_TMOUT_FF_WAIT = 4 * HZ / 5,
ATA_TMOUT_FF_WAIT = 800,
/* Spec mandates to wait for ">= 2ms" before checking status
* after reset. We wait 150ms, because that was the magic
@ -256,14 +261,14 @@ enum {
*
* Old drivers/ide uses the 2mS rule and then waits for ready.
*/
ATA_WAIT_AFTER_RESET_MSECS = 150,
ATA_WAIT_AFTER_RESET = 150,
/* If PMP is supported, we have to do follow-up SRST. As some
* PMPs don't send D2H Reg FIS after hardreset, LLDs are
* advised to wait only for the following duration before
* doing SRST.
*/
ATA_TMOUT_PMP_SRST_WAIT = 1 * HZ,
ATA_TMOUT_PMP_SRST_WAIT = 1000,
/* ATA bus states */
BUS_UNKNOWN = 0,
@ -340,6 +345,11 @@ enum {
SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
/* This should match the actual table size of
* ata_eh_cmd_timeout_table in libata-eh.c.
*/
ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5,
/* Horkage types. May be set by libata or controller on drives
(some horkage may be drive/controller pair dependant */
@ -441,6 +451,15 @@ enum link_pm {
MEDIUM_POWER,
};
extern struct device_attribute dev_attr_link_power_management_policy;
extern struct device_attribute dev_attr_em_message_type;
extern struct device_attribute dev_attr_em_message;
extern struct device_attribute dev_attr_sw_activity;
enum sw_activity {
OFF,
BLINK_ON,
BLINK_OFF,
};
#ifdef CONFIG_ATA_SFF
struct ata_ioports {
@ -597,10 +616,14 @@ struct ata_eh_info {
struct ata_eh_context {
struct ata_eh_info i;
int tries[ATA_MAX_DEVICES];
int cmd_timeout_idx[ATA_MAX_DEVICES]
[ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
unsigned int classes[ATA_MAX_DEVICES];
unsigned int did_probe_mask;
unsigned int saved_ncq_enabled;
u8 saved_xfer_mode[ATA_MAX_DEVICES];
/* timestamp for the last reset attempt or success */
unsigned long last_reset;
};
struct ata_acpi_drive
@ -692,6 +715,7 @@ struct ata_port {
struct timer_list fastdrain_timer;
unsigned long fastdrain_cnt;
int em_message_type;
void *private_data;
#ifdef CONFIG_ATA_ACPI
@ -783,6 +807,12 @@ struct ata_port_operations {
u8 (*bmdma_status)(struct ata_port *ap);
#endif /* CONFIG_ATA_SFF */
ssize_t (*em_show)(struct ata_port *ap, char *buf);
ssize_t (*em_store)(struct ata_port *ap, const char *message,
size_t size);
ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
ssize_t (*sw_activity_store)(struct ata_device *dev,
enum sw_activity val);
/*
* Obsolete
*/
@ -895,8 +925,7 @@ extern void ata_host_resume(struct ata_host *host);
#endif
extern int ata_ratelimit(void);
extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
unsigned long interval_msec,
unsigned long timeout_msec);
unsigned long interval, unsigned long timeout);
extern int atapi_cmd_type(u8 opcode);
extern void ata_tf_to_fis(const struct ata_taskfile *tf,
u8 pmp, int is_cmd, u8 *fis);
@ -1389,6 +1418,12 @@ static inline int ata_check_ready(u8 status)
return 0;
}
static inline unsigned long ata_deadline(unsigned long from_jiffies,
unsigned long timeout_msecs)
{
return from_jiffies + msecs_to_jiffies(timeout_msecs);
}
/**************************************************************************
* PMP - drivers/ata/libata-pmp.c