From 30dcf76acc695cbd2fa919e294670fe9552e16e7 Mon Sep 17 00:00:00 2001
From: Matthew Garrett <mjg@redhat.com>
Date: Mon, 25 Jun 2012 16:13:04 +0800
Subject: libata: migrate ACPI code over to new bindings
Now that we have the ability to directly glue the ACPI namespace to the
driver model in libata, we don't need the custom code to handle the same
thing. Remove it and migrate the functions over to the new code.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Holger Macht <holger@homac.de>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---
include/linux/libata.h | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
(limited to 'include/linux/libata.h')
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 6e887c742a2..888feef3cda 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -545,9 +545,6 @@ struct ata_host {
struct mutex eh_mutex;
struct task_struct *eh_owner;
-#ifdef CONFIG_ATA_ACPI
- acpi_handle acpi_handle;
-#endif
struct ata_port *simplex_claimed; /* channel owning the DMA */
struct ata_port *ports[0];
};
@@ -615,7 +612,6 @@ struct ata_device {
struct scsi_device *sdev; /* attached SCSI device */
void *private_data;
#ifdef CONFIG_ATA_ACPI
- acpi_handle acpi_handle;
union acpi_object *gtf_cache;
unsigned int gtf_filter;
#endif
@@ -797,7 +793,6 @@ struct ata_port {
void *private_data;
#ifdef CONFIG_ATA_ACPI
- acpi_handle acpi_handle;
struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
#endif
/* owned by EH */
@@ -1114,6 +1109,8 @@ int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
const struct ata_acpi_gtm *gtm);
+acpi_handle ata_ap_acpi_handle(struct ata_port *ap);
+acpi_handle ata_dev_acpi_handle(struct ata_device *dev);
int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
#else
static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
--
cgit v1.2.3-70-g09d2
From b1354cbb5bfce28f2e1ed28d77b362dfdfca638d Mon Sep 17 00:00:00 2001
From: Lin Ming <ming.m.lin@intel.com>
Date: Mon, 25 Jun 2012 16:13:08 +0800
Subject: libata: detect Device Attention support
Add a new flag ATA_DFLAG_DA to indicate that device supports "Device
Attention".
Acked-by: Aaron Lu <aaron.lu@amd.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---
drivers/ata/libata-core.c | 3 +++
include/linux/ata.h | 1 +
include/linux/libata.h | 2 ++
3 files changed, 6 insertions(+)
(limited to 'include/linux/libata.h')
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 7705191b5a8..c14f88c1f1d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2374,6 +2374,9 @@ int ata_dev_configure(struct ata_device *dev)
dma_dir_string = ", DMADIR";
}
+ if (ata_id_has_da(dev->id))
+ dev->flags |= ATA_DFLAG_DA;
+
/* print device info to dmesg */
if (ata_msg_drv(ap) && print_info)
ata_dev_info(dev,
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 32df2b6ef0e..5713d3ac381 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -578,6 +578,7 @@ static inline int ata_is_data(u8 prot)
((u64) (id)[(n) + 0]) )
#define ata_id_cdb_intr(id) (((id)[ATA_ID_CONFIG] & 0x60) == 0x20)
+#define ata_id_has_da(id) ((id)[77] & (1 << 4))
static inline bool ata_id_has_hipm(const u16 *id)
{
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 888feef3cda..cc22b943db8 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -161,6 +161,8 @@ enum {
ATA_DFLAG_DETACH = (1 << 24),
ATA_DFLAG_DETACHED = (1 << 25),
+ ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */
+
ATA_DEV_UNKNOWN = 0, /* unknown device */
ATA_DEV_ATA = 1, /* ATA device */
ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
--
cgit v1.2.3-70-g09d2
From e4a9c3732cea3e3c8c704aad86636090ffe6b25f Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@intel.com>
Date: Thu, 21 Jun 2012 23:25:27 -0700
Subject: [SCSI] libata, libsas: introduce sched_eh and end_eh port ops
When managing shost->host_eh_scheduled libata assumes that there is a
1:1 shost-to-ata_port relationship. libsas creates a 1:N relationship
so it needs to manage host_eh_scheduled cumulatively at the host level.
The sched_eh and end_eh port port ops allow libsas to track when domain
devices enter/leave the "eh-pending" state under ha->lock (previously
named ha->state_lock, but it is no longer just a lock for ha->state
changes).
Since host_eh_scheduled indicates eh without backing commands pinning
the device it can be deallocated at any time. Move the taking of the
domain_device reference under the port_lock to guarantee that the
ata_port stays around for the duration of eh.
Reviewed-by: Jacek Danecki <jacek.danecki@intel.com>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---
drivers/ata/libata-core.c | 4 +++
drivers/ata/libata-eh.c | 57 ++++++++++++++++++++++++++++++-------
drivers/scsi/libsas/sas_ata.c | 38 ++++++++++++++++++++++---
drivers/scsi/libsas/sas_discover.c | 6 ++--
drivers/scsi/libsas/sas_event.c | 12 ++++----
drivers/scsi/libsas/sas_init.c | 14 ++++-----
drivers/scsi/libsas/sas_scsi_host.c | 27 ++++++++++++++----
include/linux/libata.h | 4 +++
include/scsi/libsas.h | 4 ++-
include/scsi/sas_ata.h | 5 ++++
10 files changed, 134 insertions(+), 37 deletions(-)
(limited to 'include/linux/libata.h')
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index cece3a4d11e..3fe1202c61c 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -80,6 +80,8 @@ const struct ata_port_operations ata_base_port_ops = {
.prereset = ata_std_prereset,
.postreset = ata_std_postreset,
.error_handler = ata_std_error_handler,
+ .sched_eh = ata_std_sched_eh,
+ .end_eh = ata_std_end_eh,
};
const struct ata_port_operations sata_port_ops = {
@@ -6642,6 +6644,8 @@ struct ata_port_operations ata_dummy_port_ops = {
.qc_prep = ata_noop_qc_prep,
.qc_issue = ata_dummy_qc_issue,
.error_handler = ata_dummy_error_handler,
+ .sched_eh = ata_std_sched_eh,
+ .end_eh = ata_std_end_eh,
};
const struct ata_port_info ata_dummy_port_info = {
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 6d53cf9b3b6..77fc80640e2 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -793,12 +793,12 @@ void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap)
ata_for_each_link(link, ap, HOST_FIRST)
memset(&link->eh_info, 0, sizeof(link->eh_info));
- /* Clear host_eh_scheduled while holding ap->lock such
- * that if exception occurs after this point but
- * before EH completion, SCSI midlayer will
+ /* end eh (clear host_eh_scheduled) while holding
+ * ap->lock such that if exception occurs after this
+ * point but before EH completion, SCSI midlayer will
* re-initiate EH.
*/
- host->host_eh_scheduled = 0;
+ ap->ops->end_eh(ap);
spin_unlock_irqrestore(ap->lock, flags);
ata_eh_release(ap);
@@ -986,16 +986,13 @@ void ata_qc_schedule_eh(struct ata_queued_cmd *qc)
}
/**
- * ata_port_schedule_eh - schedule error handling without a qc
- * @ap: ATA port to schedule EH for
- *
- * Schedule error handling for @ap. EH will kick in as soon as
- * all commands are drained.
+ * ata_std_sched_eh - non-libsas ata_ports issue eh with this common routine
+ * @ap: ATA port to schedule EH for
*
- * LOCKING:
+ * LOCKING: inherited from ata_port_schedule_eh
* spin_lock_irqsave(host lock)
*/
-void ata_port_schedule_eh(struct ata_port *ap)
+void ata_std_sched_eh(struct ata_port *ap)
{
WARN_ON(!ap->ops->error_handler);
@@ -1007,6 +1004,44 @@ void ata_port_schedule_eh(struct ata_port *ap)
DPRINTK("port EH scheduled\n");
}
+EXPORT_SYMBOL_GPL(ata_std_sched_eh);
+
+/**
+ * ata_std_end_eh - non-libsas ata_ports complete eh with this common routine
+ * @ap: ATA port to end EH for
+ *
+ * In the libata object model there is a 1:1 mapping of ata_port to
+ * shost, so host fields can be directly manipulated under ap->lock, in
+ * the libsas case we need to hold a lock at the ha->level to coordinate
+ * these events.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host lock)
+ */
+void ata_std_end_eh(struct ata_port *ap)
+{
+ struct Scsi_Host *host = ap->scsi_host;
+
+ host->host_eh_scheduled = 0;
+}
+EXPORT_SYMBOL(ata_std_end_eh);
+
+
+/**
+ * ata_port_schedule_eh - schedule error handling without a qc
+ * @ap: ATA port to schedule EH for
+ *
+ * Schedule error handling for @ap. EH will kick in as soon as
+ * all commands are drained.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host lock)
+ */
+void ata_port_schedule_eh(struct ata_port *ap)
+{
+ /* see: ata_std_sched_eh, unless you know better */
+ ap->ops->sched_eh(ap);
+}
static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link)
{
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index d109cc3a17b..b035acf1873 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -523,6 +523,31 @@ static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev)
i->dft->lldd_ata_set_dmamode(dev);
}
+static void sas_ata_sched_eh(struct ata_port *ap)
+{
+ struct domain_device *dev = ap->private_data;
+ struct sas_ha_struct *ha = dev->port->ha;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ha->lock, flags);
+ if (!test_and_set_bit(SAS_DEV_EH_PENDING, &dev->state))
+ ha->eh_active++;
+ ata_std_sched_eh(ap);
+ spin_unlock_irqrestore(&ha->lock, flags);
+}
+
+void sas_ata_end_eh(struct ata_port *ap)
+{
+ struct domain_device *dev = ap->private_data;
+ struct sas_ha_struct *ha = dev->port->ha;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ha->lock, flags);
+ if (test_and_clear_bit(SAS_DEV_EH_PENDING, &dev->state))
+ ha->eh_active--;
+ spin_unlock_irqrestore(&ha->lock, flags);
+}
+
static struct ata_port_operations sas_sata_ops = {
.prereset = ata_std_prereset,
.hardreset = sas_ata_hard_reset,
@@ -536,6 +561,8 @@ static struct ata_port_operations sas_sata_ops = {
.port_start = ata_sas_port_start,
.port_stop = ata_sas_port_stop,
.set_dmamode = sas_ata_set_dmamode,
+ .sched_eh = sas_ata_sched_eh,
+ .end_eh = sas_ata_end_eh,
};
static struct ata_port_info sata_port_info = {
@@ -708,10 +735,6 @@ static void async_sas_ata_eh(void *data, async_cookie_t cookie)
struct ata_port *ap = dev->sata_dev.ap;
struct sas_ha_struct *ha = dev->port->ha;
- /* hold a reference over eh since we may be racing with final
- * remove once all commands are completed
- */
- kref_get(&dev->kref);
sas_ata_printk(KERN_DEBUG, dev, "dev error handler\n");
ata_scsi_port_error_handler(ha->core.shost, ap);
sas_put_device(dev);
@@ -742,6 +765,13 @@ void sas_ata_strategy_handler(struct Scsi_Host *shost)
list_for_each_entry(dev, &port->dev_list, dev_list_node) {
if (!dev_is_sata(dev))
continue;
+
+ /* hold a reference over eh since we may be
+ * racing with final remove once all commands
+ * are completed
+ */
+ kref_get(&dev->kref);
+
async_schedule_domain(async_sas_ata_eh, dev, &async);
}
spin_unlock(&port->dev_list_lock);
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index 629a0865b13..ff497ac76cb 100644
--- a/drivers/scsi/libsas/sas_discover.c
+++ b/drivers/scsi/libsas/sas_discover.c
@@ -294,6 +294,8 @@ static void sas_unregister_common_dev(struct asd_sas_port *port, struct domain_d
spin_lock_irq(&port->dev_list_lock);
list_del_init(&dev->dev_list_node);
+ if (dev_is_sata(dev))
+ sas_ata_end_eh(dev->sata_dev.ap);
spin_unlock_irq(&port->dev_list_lock);
sas_put_device(dev);
@@ -488,9 +490,9 @@ static void sas_chain_event(int event, unsigned long *pending,
if (!test_and_set_bit(event, pending)) {
unsigned long flags;
- spin_lock_irqsave(&ha->state_lock, flags);
+ spin_lock_irqsave(&ha->lock, flags);
sas_chain_work(ha, sw);
- spin_unlock_irqrestore(&ha->state_lock, flags);
+ spin_unlock_irqrestore(&ha->lock, flags);
}
}
diff --git a/drivers/scsi/libsas/sas_event.c b/drivers/scsi/libsas/sas_event.c
index 4e4292d210c..789c4d8bb7a 100644
--- a/drivers/scsi/libsas/sas_event.c
+++ b/drivers/scsi/libsas/sas_event.c
@@ -47,9 +47,9 @@ static void sas_queue_event(int event, unsigned long *pending,
if (!test_and_set_bit(event, pending)) {
unsigned long flags;
- spin_lock_irqsave(&ha->state_lock, flags);
+ spin_lock_irqsave(&ha->lock, flags);
sas_queue_work(ha, work);
- spin_unlock_irqrestore(&ha->state_lock, flags);
+ spin_unlock_irqrestore(&ha->lock, flags);
}
}
@@ -61,18 +61,18 @@ void __sas_drain_work(struct sas_ha_struct *ha)
set_bit(SAS_HA_DRAINING, &ha->state);
/* flush submitters */
- spin_lock_irq(&ha->state_lock);
- spin_unlock_irq(&ha->state_lock);
+ spin_lock_irq(&ha->lock);
+ spin_unlock_irq(&ha->lock);
drain_workqueue(wq);
- spin_lock_irq(&ha->state_lock);
+ spin_lock_irq(&ha->lock);
clear_bit(SAS_HA_DRAINING, &ha->state);
list_for_each_entry_safe(sw, _sw, &ha->defer_q, drain_node) {
list_del_init(&sw->drain_node);
sas_queue_work(ha, sw);
}
- spin_unlock_irq(&ha->state_lock);
+ spin_unlock_irq(&ha->lock);
}
int sas_drain_work(struct sas_ha_struct *ha)
diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c
index 10cb5ae3097..6909fefa32c 100644
--- a/drivers/scsi/libsas/sas_init.c
+++ b/drivers/scsi/libsas/sas_init.c
@@ -114,7 +114,7 @@ int sas_register_ha(struct sas_ha_struct *sas_ha)
sas_ha->lldd_queue_size = 128; /* Sanity */
set_bit(SAS_HA_REGISTERED, &sas_ha->state);
- spin_lock_init(&sas_ha->state_lock);
+ spin_lock_init(&sas_ha->lock);
mutex_init(&sas_ha->drain_mutex);
INIT_LIST_HEAD(&sas_ha->defer_q);
@@ -163,9 +163,9 @@ int sas_unregister_ha(struct sas_ha_struct *sas_ha)
* events to be queued, and flush any in-progress drainers
*/
mutex_lock(&sas_ha->drain_mutex);
- spin_lock_irq(&sas_ha->state_lock);
+ spin_lock_irq(&sas_ha->lock);
clear_bit(SAS_HA_REGISTERED, &sas_ha->state);
- spin_unlock_irq(&sas_ha->state_lock);
+ spin_unlock_irq(&sas_ha->lock);
__sas_drain_work(sas_ha);
mutex_unlock(&sas_ha->drain_mutex);
@@ -411,9 +411,9 @@ static int queue_phy_reset(struct sas_phy *phy, int hard_reset)
d->reset_result = 0;
d->hard_reset = hard_reset;
- spin_lock_irq(&ha->state_lock);
+ spin_lock_irq(&ha->lock);
sas_queue_work(ha, &d->reset_work);
- spin_unlock_irq(&ha->state_lock);
+ spin_unlock_irq(&ha->lock);
rc = sas_drain_work(ha);
if (rc == 0)
@@ -438,9 +438,9 @@ static int queue_phy_enable(struct sas_phy *phy, int enable)
d->enable_result = 0;
d->enable = enable;
- spin_lock_irq(&ha->state_lock);
+ spin_lock_irq(&ha->lock);
sas_queue_work(ha, &d->enable_work);
- spin_unlock_irq(&ha->state_lock);
+ spin_unlock_irq(&ha->lock);
rc = sas_drain_work(ha);
if (rc == 0)
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index f0b9b7bf188..a09da44e282 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -667,16 +667,20 @@ static void sas_eh_handle_sas_errors(struct Scsi_Host *shost, struct list_head *
goto out;
}
+
void sas_scsi_recover_host(struct Scsi_Host *shost)
{
struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
- unsigned long flags;
LIST_HEAD(eh_work_q);
+ int tries = 0;
+ bool retry;
- spin_lock_irqsave(shost->host_lock, flags);
+retry:
+ tries++;
+ retry = true;
+ spin_lock_irq(shost->host_lock);
list_splice_init(&shost->eh_cmd_q, &eh_work_q);
- shost->host_eh_scheduled = 0;
- spin_unlock_irqrestore(shost->host_lock, flags);
+ spin_unlock_irq(shost->host_lock);
SAS_DPRINTK("Enter %s busy: %d failed: %d\n",
__func__, shost->host_busy, shost->host_failed);
@@ -710,8 +714,19 @@ out:
scsi_eh_flush_done_q(&ha->eh_done_q);
- SAS_DPRINTK("--- Exit %s: busy: %d failed: %d\n",
- __func__, shost->host_busy, shost->host_failed);
+ /* check if any new eh work was scheduled during the last run */
+ spin_lock_irq(&ha->lock);
+ if (ha->eh_active == 0) {
+ shost->host_eh_scheduled = 0;
+ retry = false;
+ }
+ spin_unlock_irq(&ha->lock);
+
+ if (retry)
+ goto retry;
+
+ SAS_DPRINTK("--- Exit %s: busy: %d failed: %d tries: %d\n",
+ __func__, shost->host_busy, shost->host_failed, tries);
}
enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *cmd)
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 6e887c742a2..53da442f892 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -846,6 +846,8 @@ struct ata_port_operations {
void (*error_handler)(struct ata_port *ap);
void (*lost_interrupt)(struct ata_port *ap);
void (*post_internal_cmd)(struct ata_queued_cmd *qc);
+ void (*sched_eh)(struct ata_port *ap);
+ void (*end_eh)(struct ata_port *ap);
/*
* Optional features
@@ -1167,6 +1169,8 @@ extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
ata_postreset_fn_t postreset);
extern void ata_std_error_handler(struct ata_port *ap);
+extern void ata_std_sched_eh(struct ata_port *ap);
+extern void ata_std_end_eh(struct ata_port *ap);
extern int ata_link_nr_enabled(struct ata_link *link);
/*
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index 10ce74f589c..814d8cb592a 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -179,6 +179,7 @@ struct sata_device {
enum {
SAS_DEV_GONE,
SAS_DEV_DESTROY,
+ SAS_DEV_EH_PENDING,
};
struct domain_device {
@@ -386,7 +387,8 @@ struct sas_ha_struct {
struct list_head defer_q; /* work queued while draining */
struct mutex drain_mutex;
unsigned long state;
- spinlock_t state_lock;
+ spinlock_t lock;
+ int eh_active;
struct mutex disco_mutex;
diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h
index 77670e823ed..2dfbdaa0b34 100644
--- a/include/scsi/sas_ata.h
+++ b/include/scsi/sas_ata.h
@@ -45,6 +45,7 @@ void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
void sas_ata_schedule_reset(struct domain_device *dev);
void sas_ata_wait_eh(struct domain_device *dev);
void sas_probe_sata(struct asd_sas_port *port);
+void sas_ata_end_eh(struct ata_port *ap);
#else
@@ -85,6 +86,10 @@ static inline int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy
{
return 0;
}
+
+static inline void sas_ata_end_eh(struct ata_port *ap)
+{
+}
#endif
#endif /* _SAS_ATA_H_ */
--
cgit v1.2.3-70-g09d2