#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>
unsigned long xfer_mask;
unsigned int horkage_on;
unsigned int horkage_off;
+ unsigned int lflags;
};
struct ata_force_ent {
module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
-int atapi_enabled = 1;
+static int atapi_enabled = 1;
module_param(atapi_enabled, int, 0444);
MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
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)");
MODULE_VERSION(DRV_VERSION);
+/*
+ * Iterator helpers. Don't use directly.
+ *
+ * LOCKING:
+ * Host lock or EH context.
+ */
+struct ata_link *__ata_port_next_link(struct ata_port *ap,
+ struct ata_link *link, bool dev_only)
+{
+ /* NULL link indicates start of iteration */
+ if (!link) {
+ if (dev_only && sata_pmp_attached(ap))
+ return ap->pmp_link;
+ return &ap->link;
+ }
+
+ /* we just iterated over the host link, what's next? */
+ if (ata_is_host_link(link)) {
+ if (!sata_pmp_attached(ap))
+ return NULL;
+ return ap->pmp_link;
+ }
+
+ /* iterate to the next PMP link */
+ if (++link < ap->pmp_link + ap->nr_pmp_links)
+ return link;
+ return NULL;
+}
+
/**
* ata_force_cbl - force cable type according to libata.force
* @ap: ATA port of interest
}
/**
- * ata_force_spd_limit - force SATA spd limit according to libata.force
+ * ata_force_link_limits - force link limits according to libata.force
* @link: ATA link of interest
*
- * Force SATA spd limit according to libata.force and whine about
- * it. When only the port part is specified (e.g. 1:), the limit
- * applies to all links connected to both the host link and all
- * fan-out ports connected via PMP. If the device part is
- * specified as 0 (e.g. 1.00:), it specifies the first fan-out
- * link not the host link. Device number 15 always points to the
- * host link whether PMP is attached or not.
+ * Force link flags and SATA spd limit according to libata.force
+ * and whine about it. When only the port part is specified
+ * (e.g. 1:), the limit applies to all links connected to both
+ * the host link and all fan-out ports connected via PMP. If the
+ * device part is specified as 0 (e.g. 1.00:), it specifies the
+ * first fan-out link not the host link. Device number 15 always
+ * points to the host link whether PMP is attached or not.
*
* LOCKING:
* EH context.
*/
-static void ata_force_spd_limit(struct ata_link *link)
+static void ata_force_link_limits(struct ata_link *link)
{
+ bool did_spd = false;
int linkno, i;
if (ata_is_host_link(link))
if (fe->device != -1 && fe->device != linkno)
continue;
- if (!fe->param.spd_limit)
- continue;
+ /* only honor the first spd limit */
+ if (!did_spd && fe->param.spd_limit) {
+ link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
+ ata_link_printk(link, KERN_NOTICE,
+ "FORCE: PHY spd limit set to %s\n",
+ fe->param.name);
+ did_spd = true;
+ }
- link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
- ata_link_printk(link, KERN_NOTICE,
- "FORCE: PHY spd limit set to %s\n", fe->param.name);
- return;
+ /* let lflags stack */
+ if (fe->param.lflags) {
+ link->flags |= fe->param.lflags;
+ ata_link_printk(link, KERN_NOTICE,
+ "FORCE: link flag 0x%x forced -> 0x%x\n",
+ fe->param.lflags, link->flags);
+ }
}
}
{
unsigned int c;
+ BUG_ON(len & 1);
+
while (len > 0) {
c = id[ofs] >> 8;
*s = c;
{
unsigned char *p;
- WARN_ON(!(len & 1));
-
ata_id_string(id, s, ofs, len - 1);
p = s + strnlen(s, len - 1);
* @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
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));
}
/**
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;
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));
spin_unlock_irqrestore(ap->lock, flags);
+ if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
+ ata_internal_cmd_timed_out(dev, command);
+
return err_mask;
}
}
/**
+ * ata_do_dev_read_id - default ID read method
+ * @dev: device
+ * @tf: proposed taskfile
+ * @id: data buffer
+ *
+ * Issue the identify taskfile and hand back the buffer containing
+ * identify data. For some RAID controllers and for pre ATA devices
+ * this function is wrapped or replaced by the driver
+ */
+unsigned int ata_do_dev_read_id(struct ata_device *dev,
+ struct ata_taskfile *tf, u16 *id)
+{
+ return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
+ id, sizeof(id[0]) * ATA_ID_WORDS, 0);
+}
+
+/**
* ata_dev_read_id - Read ID data from the specified device
* @dev: target device
* @p_class: pointer to class of the target device (may be changed)
if (ata_msg_ctl(ap))
ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
- retry:
+retry:
ata_tf_init(dev, &tf);
switch (class) {
*/
tf.flags |= ATA_TFLAG_POLLING;
- err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
- id, sizeof(id[0]) * ATA_ID_WORDS, 0);
+ if (ap->ops->read_id)
+ err_mask = ap->ops->read_id(dev, &tf, id);
+ else
+ err_mask = ata_do_dev_read_id(dev, &tf, id);
+
if (err_mask) {
if (err_mask & AC_ERR_NODEV_HINT) {
ata_dev_printk(dev, KERN_DEBUG,
dev->horkage |= ata_dev_blacklisted(dev);
ata_force_horkage(dev);
+ if (dev->horkage & ATA_HORKAGE_DISABLE) {
+ ata_dev_printk(dev, KERN_INFO,
+ "unsupported device, disabling\n");
+ ata_dev_disable(dev);
+ return 0;
+ }
+
+ if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
+ dev->class == ATA_DEV_ATAPI) {
+ ata_dev_printk(dev, KERN_WARNING,
+ "WARNING: ATAPI is %s, device ignored.\n",
+ atapi_enabled ? "not supported with this driver"
+ : "disabled");
+ ata_dev_disable(dev);
+ return 0;
+ }
+
/* let ACPI work its magic */
rc = ata_acpi_on_devcfg(dev);
if (rc)
dev->dma_mode = ata_xfer_mask2mode(dma_mask);
found = 1;
- if (dev->dma_mode != 0xff)
+ if (ata_dma_enabled(dev))
used_dma = 1;
}
if (!found)
/* step 3: set host DMA timings */
ata_link_for_each_dev(dev, link) {
- if (!ata_dev_enabled(dev) || dev->dma_mode == 0xff)
+ if (!ata_dev_enabled(dev) || !ata_dma_enabled(dev))
continue;
dev->xfer_mode = dev->dma_mode;
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))
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);
}
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;
last_jiffies = jiffies;
while (1) {
- msleep(interval_msec);
+ msleep(interval);
if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
return rc;
cur &= 0xf;
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;
}
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);
{ "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
{ "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
/* Odd clown on sil3726/4726 PMPs */
- { "Config Disk", NULL, ATA_HORKAGE_NODMA |
- ATA_HORKAGE_SKIP_PM },
+ { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
/* Weird ATAPI devices */
{ "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
}
/**
- * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
+ * atapi_check_dma - Check whether ATAPI DMA can be supported
* @qc: Metadata associated with taskfile to check
*
* Allow low-level driver to filter ATA PACKET commands, returning
* RETURNS: 0 when ATAPI DMA can be used
* nonzero otherwise
*/
-int ata_check_atapi_dma(struct ata_queued_cmd *qc)
+int atapi_check_dma(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
int sata_scr_read(struct ata_link *link, int reg, u32 *val)
{
if (ata_is_host_link(link)) {
- struct ata_port *ap = link->ap;
-
if (sata_scr_valid(link))
- return ap->ops->scr_read(ap, reg, val);
+ return link->ap->ops->scr_read(link, reg, val);
return -EOPNOTSUPP;
}
int sata_scr_write(struct ata_link *link, int reg, u32 val)
{
if (ata_is_host_link(link)) {
- struct ata_port *ap = link->ap;
-
if (sata_scr_valid(link))
- return ap->ops->scr_write(ap, reg, val);
+ return link->ap->ops->scr_write(link, reg, val);
return -EOPNOTSUPP;
}
int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
{
if (ata_is_host_link(link)) {
- struct ata_port *ap = link->ap;
int rc;
if (sata_scr_valid(link)) {
- rc = ap->ops->scr_write(ap, reg, val);
+ rc = link->ap->ops->scr_write(link, reg, val);
if (rc == 0)
- rc = ap->ops->scr_read(ap, reg, &val);
+ rc = link->ap->ops->scr_read(link, reg, &val);
return rc;
}
return -EOPNOTSUPP;
*/
int sata_link_init_spd(struct ata_link *link)
{
- u32 scontrol;
u8 spd;
int rc;
- rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
+ rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
if (rc)
return rc;
- spd = (scontrol >> 4) & 0xf;
+ spd = (link->saved_scontrol >> 4) & 0xf;
if (spd)
link->hw_sata_spd_limit &= (1 << spd) - 1;
- ata_force_spd_limit(link);
+ ata_force_link_limits(link);
link->sata_spd_limit = link->hw_sata_spd_limit;
*/
static void ata_finalize_port_ops(struct ata_port_operations *ops)
{
- static spinlock_t lock = SPIN_LOCK_UNLOCKED;
+ static DEFINE_SPINLOCK(lock);
const struct ata_port_operations *cur;
void **begin = (void **)ops;
void **end = (void **)&ops->inherits;
ata_port_wait_eh(ap);
/* EH is now guaranteed to see UNLOADING - EH context belongs
- * to us. Disable all existing devices.
+ * to us. Restore SControl and disable all existing devices.
*/
- ata_port_for_each_link(link, ap) {
+ __ata_port_for_each_link(link, ap) {
+ sata_scr_write(link, SCR_CONTROL, link->saved_scontrol);
ata_link_for_each_dev(dev, link)
ata_dev_disable(dev);
}
{ "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
{ "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
{ "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
+ { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
+ { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
+ { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
};
char *start = *cur, *p = *cur;
char *id, *val, *endp;
static int __init ata_init(void)
{
- ata_probe_timeout *= HZ;
-
ata_parse_force_param();
ata_wq = create_workqueue("ata");
if (!ata_wq)
- return -ENOMEM;
+ goto free_force_tbl;
ata_aux_wq = create_singlethread_workqueue("ata_aux");
- if (!ata_aux_wq) {
- destroy_workqueue(ata_wq);
- return -ENOMEM;
- }
+ if (!ata_aux_wq)
+ goto free_wq;
printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
return 0;
+
+free_wq:
+ destroy_workqueue(ata_wq);
+free_force_tbl:
+ kfree(ata_force_tbl);
+ return -ENOMEM;
}
static void __exit ata_exit(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
* 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);
* 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);
}
EXPORT_SYMBOL_GPL(sata_port_ops);
EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
EXPORT_SYMBOL_GPL(ata_dummy_port_info);
+EXPORT_SYMBOL_GPL(__ata_port_next_link);
EXPORT_SYMBOL_GPL(ata_std_bios_param);
EXPORT_SYMBOL_GPL(ata_host_init);
EXPORT_SYMBOL_GPL(ata_host_alloc);
#endif /* CONFIG_PM */
EXPORT_SYMBOL_GPL(ata_id_string);
EXPORT_SYMBOL_GPL(ata_id_c_string);
+EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
EXPORT_SYMBOL_GPL(ata_scsi_simulate);
EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff