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authorLinus Torvalds <torvalds@linux-foundation.org>2008-06-04 08:36:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-06-04 08:36:56 -0700
commit246dd412d31e4f5de1d43aa6422a325b785f36e4 (patch)
tree404b0a126f523abd526daaf02846958a2647907c
parent2d9b57fbec9fde4deea3686f3927204efa218c7f (diff)
parenta57c1bade5a0ee5cd8b74502db9cbebb7f5780b2 (diff)
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: libata-sff: Fix oops reported in kerneloops.org for pnp devices with no ctl libata: kill unused constants sata_mv: PHY_MODE4 cleanups [libata] ata_piix: more acer short cable quirks [libata] ACPI: Properly handle bay devices in dock stations
-rw-r--r--drivers/ata/ata_piix.c2
-rw-r--r--drivers/ata/libata-acpi.c165
-rw-r--r--drivers/ata/libata-sff.c115
-rw-r--r--drivers/ata/pata_icside.c2
-rw-r--r--drivers/ata/pata_rb532_cf.c4
-rw-r--r--drivers/ata/pata_scc.c5
-rw-r--r--drivers/ata/sata_mv.c24
-rw-r--r--include/linux/libata.h19
8 files changed, 239 insertions, 97 deletions
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 3548ee7014ca..81b7ae376951 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -574,6 +574,8 @@ static const struct ich_laptop ich_laptop[] = {
{ 0x27DF, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */
{ 0x27DF, 0x103C, 0x30A1 }, /* ICH7 on HP Compaq nc2400 */
{ 0x24CA, 0x1025, 0x0061 }, /* ICH4 on ACER Aspire 2023WLMi */
+ { 0x24CA, 0x1025, 0x003d }, /* ICH4 on ACER TM290 */
+ { 0x266F, 0x1025, 0x0066 }, /* ICH6 on ACER Aspire 1694WLMi */
{ 0x2653, 0x1043, 0x82D8 }, /* ICH6M on Asus Eee 701 */
/* end marker */
{ 0, }
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index dbf6ca781f66..3ff8b14420d9 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -118,12 +118,62 @@ static void ata_acpi_associate_ide_port(struct ata_port *ap)
ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
}
-static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device
- *dev, u32 event)
+static void ata_acpi_eject_device(acpi_handle handle)
+{
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
+
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = 1;
+
+ if (ACPI_FAILURE(acpi_evaluate_object(handle, "_EJ0",
+ &arg_list, NULL)))
+ printk(KERN_ERR "Failed to evaluate _EJ0!\n");
+}
+
+/* @ap and @dev are the same as ata_acpi_handle_hotplug() */
+static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev)
+{
+ if (dev)
+ dev->flags |= ATA_DFLAG_DETACH;
+ else {
+ struct ata_link *tlink;
+ struct ata_device *tdev;
+
+ ata_port_for_each_link(tlink, ap)
+ ata_link_for_each_dev(tdev, tlink)
+ tdev->flags |= ATA_DFLAG_DETACH;
+ }
+
+ ata_port_schedule_eh(ap);
+}
+
+/**
+ * ata_acpi_handle_hotplug - ACPI event handler backend
+ * @ap: ATA port ACPI event occurred
+ * @dev: ATA device ACPI event occurred (can be NULL)
+ * @event: ACPI event which occurred
+ * @is_dock_event: boolean indicating whether the event was a dock one
+ *
+ * All ACPI bay / device realted events end up in this function. If
+ * the event is port-wide @dev is NULL. If the event is specific to a
+ * device, @dev points to it.
+ *
+ * Hotplug (as opposed to unplug) notification is always handled as
+ * port-wide while unplug only kills the target device on device-wide
+ * event.
+ *
+ * LOCKING:
+ * ACPI notify handler context. May sleep.
+ */
+static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
+ u32 event, int is_dock_event)
{
char event_string[12];
char *envp[] = { event_string, NULL };
- struct ata_eh_info *ehi;
+ struct ata_eh_info *ehi = &ap->link.eh_info;
struct kobject *kobj = NULL;
int wait = 0;
unsigned long flags;
@@ -131,87 +181,100 @@ static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device
unsigned long sta;
acpi_status status;
- if (!ap)
- ap = dev->link->ap;
- ehi = &ap->link.eh_info;
-
- spin_lock_irqsave(ap->lock, flags);
-
- if (dev)
+ if (dev) {
+ if (dev->sdev)
+ kobj = &dev->sdev->sdev_gendev.kobj;
handle = dev->acpi_handle;
- else
+ } else {
+ kobj = &ap->dev->kobj;
handle = ap->acpi_handle;
+ }
status = acpi_get_handle(handle, "_EJ0", &tmphandle);
- if (ACPI_FAILURE(status)) {
- /* This device is not ejectable */
- spin_unlock_irqrestore(ap->lock, flags);
+ if (ACPI_FAILURE(status))
+ /* This device does not support hotplug */
return;
- }
- status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
- if (ACPI_FAILURE(status)) {
- printk ("Unable to determine bay status\n");
- spin_unlock_irqrestore(ap->lock, flags);
- return;
- }
+ spin_lock_irqsave(ap->lock, flags);
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
ata_ehi_push_desc(ehi, "ACPI event");
- if (!sta) {
- /* Device has been unplugged */
- if (dev)
- dev->flags |= ATA_DFLAG_DETACH;
- else {
- struct ata_link *tlink;
- struct ata_device *tdev;
-
- ata_port_for_each_link(tlink, ap) {
- ata_link_for_each_dev(tdev, tlink) {
- tdev->flags |=
- ATA_DFLAG_DETACH;
- }
- }
- }
- ata_port_schedule_eh(ap);
- wait = 1;
- } else {
+
+ status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
+ if (ACPI_FAILURE(status)) {
+ ata_port_printk(ap, KERN_ERR,
+ "acpi: failed to determine bay status (0x%x)\n",
+ status);
+ break;
+ }
+
+ if (sta) {
ata_ehi_hotplugged(ehi);
ata_port_freeze(ap);
+ } else {
+ /* The device has gone - unplug it */
+ ata_acpi_detach_device(ap, dev);
+ wait = 1;
}
+ break;
+ case ACPI_NOTIFY_EJECT_REQUEST:
+ ata_ehi_push_desc(ehi, "ACPI event");
+
+ if (!is_dock_event)
+ break;
+
+ /* undock event - immediate unplug */
+ ata_acpi_detach_device(ap, dev);
+ wait = 1;
+ break;
}
+ /* make sure kobj doesn't go away while ap->lock is released */
+ kobject_get(kobj);
+
spin_unlock_irqrestore(ap->lock, flags);
- if (wait)
+ if (wait) {
ata_port_wait_eh(ap);
+ ata_acpi_eject_device(handle);
+ }
- if (dev) {
- if (dev->sdev)
- kobj = &dev->sdev->sdev_gendev.kobj;
- } else
- kobj = &ap->dev->kobj;
-
- if (kobj) {
+ if (kobj && !is_dock_event) {
sprintf(event_string, "BAY_EVENT=%d", event);
kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
}
+
+ kobject_put(kobj);
+}
+
+static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data)
+{
+ struct ata_device *dev = data;
+
+ ata_acpi_handle_hotplug(dev->link->ap, dev, event, 1);
+}
+
+static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data)
+{
+ struct ata_port *ap = data;
+
+ ata_acpi_handle_hotplug(ap, NULL, event, 1);
}
static void ata_acpi_dev_notify(acpi_handle handle, u32 event, void *data)
{
struct ata_device *dev = data;
- ata_acpi_handle_hotplug(NULL, dev, event);
+ ata_acpi_handle_hotplug(dev->link->ap, dev, event, 0);
}
static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data)
{
struct ata_port *ap = data;
- ata_acpi_handle_hotplug(ap, NULL, event);
+ ata_acpi_handle_hotplug(ap, NULL, event, 0);
}
/**
@@ -252,7 +315,7 @@ void ata_acpi_associate(struct ata_host *host)
ata_acpi_ap_notify, ap);
/* we might be on a docking station */
register_hotplug_dock_device(ap->acpi_handle,
- ata_acpi_ap_notify, ap);
+ ata_acpi_ap_notify_dock, ap);
}
for (j = 0; j < ata_link_max_devices(&ap->link); j++) {
@@ -264,7 +327,7 @@ void ata_acpi_associate(struct ata_host *host)
ata_acpi_dev_notify, dev);
/* we might be on a docking station */
register_hotplug_dock_device(dev->acpi_handle,
- ata_acpi_dev_notify, dev);
+ ata_acpi_dev_notify_dock, dev);
}
}
}
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 3c2d2289f85e..90d20c615ef5 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -247,7 +247,7 @@ u8 ata_sff_check_status(struct ata_port *ap)
* LOCKING:
* Inherited from caller.
*/
-u8 ata_sff_altstatus(struct ata_port *ap)
+static u8 ata_sff_altstatus(struct ata_port *ap)
{
if (ap->ops->sff_check_altstatus)
return ap->ops->sff_check_altstatus(ap);
@@ -256,6 +256,93 @@ u8 ata_sff_altstatus(struct ata_port *ap)
}
/**
+ * ata_sff_irq_status - Check if the device is busy
+ * @ap: port where the device is
+ *
+ * Determine if the port is currently busy. Uses altstatus
+ * if available in order to avoid clearing shared IRQ status
+ * when finding an IRQ source. Non ctl capable devices don't
+ * share interrupt lines fortunately for us.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+static u8 ata_sff_irq_status(struct ata_port *ap)
+{
+ u8 status;
+
+ if (ap->ops->sff_check_altstatus || ap->ioaddr.altstatus_addr) {
+ status = ata_sff_altstatus(ap);
+ /* Not us: We are busy */
+ if (status & ATA_BUSY)
+ return status;
+ }
+ /* Clear INTRQ latch */
+ status = ata_sff_check_status(ap);
+ return status;
+}
+
+/**
+ * ata_sff_sync - Flush writes
+ * @ap: Port to wait for.
+ *
+ * CAUTION:
+ * If we have an mmio device with no ctl and no altstatus
+ * method this will fail. No such devices are known to exist.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
+static void ata_sff_sync(struct ata_port *ap)
+{
+ if (ap->ops->sff_check_altstatus)
+ ap->ops->sff_check_altstatus(ap);
+ else if (ap->ioaddr.altstatus_addr)
+ ioread8(ap->ioaddr.altstatus_addr);
+}
+
+/**
+ * ata_sff_pause - Flush writes and wait 400nS
+ * @ap: Port to pause for.
+ *
+ * CAUTION:
+ * If we have an mmio device with no ctl and no altstatus
+ * method this will fail. No such devices are known to exist.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
+void ata_sff_pause(struct ata_port *ap)
+{
+ ata_sff_sync(ap);
+ ndelay(400);
+}
+
+/**
+ * ata_sff_dma_pause - Pause before commencing DMA
+ * @ap: Port to pause for.
+ *
+ * Perform I/O fencing and ensure sufficient cycle delays occur
+ * for the HDMA1:0 transition
+ */
+
+void ata_sff_dma_pause(struct ata_port *ap)
+{
+ if (ap->ops->sff_check_altstatus || ap->ioaddr.altstatus_addr) {
+ /* An altstatus read will cause the needed delay without
+ messing up the IRQ status */
+ ata_sff_altstatus(ap);
+ return;
+ }
+ /* There are no DMA controllers without ctl. BUG here to ensure
+ we never violate the HDMA1:0 transition timing and risk
+ corruption. */
+ BUG();
+}
+
+/**
* ata_sff_busy_sleep - sleep until BSY clears, or timeout
* @ap: port containing status register to be polled
* @tmout_pat: impatience timeout
@@ -742,7 +829,7 @@ static void ata_pio_sectors(struct ata_queued_cmd *qc)
} else
ata_pio_sector(qc);
- ata_sff_altstatus(qc->ap); /* flush */
+ ata_sff_sync(qc->ap); /* flush */
}
/**
@@ -763,8 +850,9 @@ static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
WARN_ON(qc->dev->cdb_len < 12);
ap->ops->sff_data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
- ata_sff_altstatus(ap); /* flush */
-
+ ata_sff_sync(ap);
+ /* FIXME: If the CDB is for DMA do we need to do the transition delay
+ or is bmdma_start guaranteed to do it ? */
switch (qc->tf.protocol) {
case ATAPI_PROT_PIO:
ap->hsm_task_state = HSM_ST;
@@ -905,7 +993,7 @@ static void atapi_pio_bytes(struct ata_queued_cmd *qc)
if (unlikely(__atapi_pio_bytes(qc, bytes)))
goto err_out;
- ata_sff_altstatus(ap); /* flush */
+ ata_sff_sync(ap); /* flush */
return;
@@ -1489,14 +1577,10 @@ inline unsigned int ata_sff_host_intr(struct ata_port *ap,
goto idle_irq;
}
- /* check altstatus */
- status = ata_sff_altstatus(ap);
- if (status & ATA_BUSY)
- goto idle_irq;
- /* check main status, clearing INTRQ */
- status = ap->ops->sff_check_status(ap);
- if (unlikely(status & ATA_BUSY))
+ /* check main status, clearing INTRQ if needed */
+ status = ata_sff_irq_status(ap);
+ if (status & ATA_BUSY)
goto idle_irq;
/* ack bmdma irq events */
@@ -2030,7 +2114,7 @@ void ata_sff_error_handler(struct ata_port *ap)
ap->ops->bmdma_stop(qc);
}
- ata_sff_altstatus(ap);
+ ata_sff_sync(ap); /* FIXME: We don't need this */
ap->ops->sff_check_status(ap);
ap->ops->sff_irq_clear(ap);
@@ -2203,7 +2287,7 @@ void ata_bmdma_stop(struct ata_queued_cmd *qc)
mmio + ATA_DMA_CMD);
/* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
- ata_sff_altstatus(ap); /* dummy read */
+ ata_sff_dma_pause(ap);
}
/**
@@ -2722,7 +2806,8 @@ EXPORT_SYMBOL_GPL(ata_sff_qc_prep);
EXPORT_SYMBOL_GPL(ata_sff_dumb_qc_prep);
EXPORT_SYMBOL_GPL(ata_sff_dev_select);
EXPORT_SYMBOL_GPL(ata_sff_check_status);
-EXPORT_SYMBOL_GPL(ata_sff_altstatus);
+EXPORT_SYMBOL_GPL(ata_sff_dma_pause);
+EXPORT_SYMBOL_GPL(ata_sff_pause);
EXPORT_SYMBOL_GPL(ata_sff_busy_sleep);
EXPORT_SYMBOL_GPL(ata_sff_wait_ready);
EXPORT_SYMBOL_GPL(ata_sff_tf_load);
diff --git a/drivers/ata/pata_icside.c b/drivers/ata/pata_icside.c
index 17138436423d..cf9e9848f8b5 100644
--- a/drivers/ata/pata_icside.c
+++ b/drivers/ata/pata_icside.c
@@ -270,7 +270,7 @@ static void pata_icside_bmdma_stop(struct ata_queued_cmd *qc)
disable_dma(state->dma);
/* see ata_bmdma_stop */
- ata_sff_altstatus(ap);
+ ata_sff_dma_pause(ap);
}
static u8 pata_icside_bmdma_status(struct ata_port *ap)
diff --git a/drivers/ata/pata_rb532_cf.c b/drivers/ata/pata_rb532_cf.c
index a108d259f19d..f8b3ffc8ae9e 100644
--- a/drivers/ata/pata_rb532_cf.c
+++ b/drivers/ata/pata_rb532_cf.c
@@ -57,7 +57,9 @@ static inline void rb532_pata_finish_io(struct ata_port *ap)
struct ata_host *ah = ap->host;
struct rb532_cf_info *info = ah->private_data;
- ata_sff_altstatus(ap);
+ /* FIXME: Keep previous delay. If this is merely a fence then
+ ata_sff_sync might be sufficient. */
+ ata_sff_dma_pause(ap);
ndelay(RB500_CF_IO_DELAY);
set_irq_type(info->irq, IRQ_TYPE_LEVEL_HIGH);
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index e965b251ca24..bbf5aa345e68 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -726,7 +726,7 @@ static void scc_bmdma_stop (struct ata_queued_cmd *qc)
in_be32(bmid_base + SCC_DMA_CMD) & ~ATA_DMA_START);
/* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
- ata_sff_altstatus(ap); /* dummy read */
+ ata_sff_dma_pause(ap); /* dummy read */
}
/**
@@ -747,7 +747,8 @@ static u8 scc_bmdma_status (struct ata_port *ap)
return host_stat;
/* errata A252,A308 workaround: Step4 */
- if ((ata_sff_altstatus(ap) & ATA_ERR) && (int_status & INTSTS_INTRQ))
+ if ((scc_check_altstatus(ap) & ATA_ERR)
+ && (int_status & INTSTS_INTRQ))
return (host_stat | ATA_DMA_INTR);
/* errata A308 workaround Step5 */
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index acf347f71a2f..60391e9a84db 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -224,6 +224,11 @@ enum {
PHY_MODE3 = 0x310,
PHY_MODE4 = 0x314,
+ PHY_MODE4_CFG_MASK = 0x00000003, /* phy internal config field */
+ PHY_MODE4_CFG_VALUE = 0x00000001, /* phy internal config field */
+ PHY_MODE4_RSVD_ZEROS = 0x5de3fffa, /* Gen2e always write zeros */
+ PHY_MODE4_RSVD_ONES = 0x00000005, /* Gen2e always write ones */
+
PHY_MODE2 = 0x330,
SATA_IFCTL_OFS = 0x344,
SATA_TESTCTL_OFS = 0x348,
@@ -2563,17 +2568,16 @@ static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
m3 &= ~0x1c;
if (fix_phy_mode4) {
- u32 m4;
-
- m4 = readl(port_mmio + PHY_MODE4);
-
- /* workaround for errata FEr SATA#10 (part 1) */
- m4 = (m4 & ~(1 << 1)) | (1 << 0);
-
- /* enforce bit restrictions on GenIIe devices */
+ u32 m4 = readl(port_mmio + PHY_MODE4);
+ /*
+ * Enforce reserved-bit restrictions on GenIIe devices only.
+ * For earlier chipsets, force only the internal config field
+ * (workaround for errata FEr SATA#10 part 1).
+ */
if (IS_GEN_IIE(hpriv))
- m4 = (m4 & ~0x5DE3FFFC) | (1 << 2);
-
+ m4 = (m4 & ~PHY_MODE4_RSVD_ZEROS) | PHY_MODE4_RSVD_ONES;
+ else
+ m4 = (m4 & ~PHY_MODE4_CFG_MASK) | PHY_MODE4_CFG_VALUE;
writel(m4, port_mmio + PHY_MODE4);
}
/*
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 4a92fbafce9d..e57e5d08312d 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -111,13 +111,10 @@ enum {
/* various global constants */
LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
- ATA_MAX_PORTS = 8,
ATA_DEF_QUEUE = 1,
/* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
ATA_MAX_QUEUE = 32,
ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
- ATA_MAX_BUS = 2,
- ATA_DEF_BUSY_WAIT = 10000,
ATA_SHORT_PAUSE = (HZ >> 6) + 1,
ATAPI_MAX_DRAIN = 16 << 10,
@@ -1435,7 +1432,8 @@ extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
extern u8 ata_sff_check_status(struct ata_port *ap);
-extern u8 ata_sff_altstatus(struct ata_port *ap);
+extern void ata_sff_pause(struct ata_port *ap);
+extern void ata_sff_dma_pause(struct ata_port *ap);
extern int ata_sff_busy_sleep(struct ata_port *ap,
unsigned long timeout_pat, unsigned long timeout);
extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
@@ -1496,19 +1494,6 @@ extern int ata_pci_sff_init_one(struct pci_dev *pdev,
#endif /* CONFIG_PCI */
/**
- * ata_sff_pause - Flush writes and pause 400 nanoseconds.
- * @ap: Port to wait for.
- *
- * LOCKING:
- * Inherited from caller.
- */
-static inline void ata_sff_pause(struct ata_port *ap)
-{
- ata_sff_altstatus(ap);
- ndelay(400);
-}
-
-/**
* ata_sff_busy_wait - Wait for a port status register
* @ap: Port to wait for.
* @bits: bits that must be clear

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