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Diffstat (limited to 'drivers/scsi/libsas/sas_init.c')
-rw-r--r--drivers/scsi/libsas/sas_init.c287
1 files changed, 188 insertions, 99 deletions
diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c
index dbc8a793fd86..8566bb1208a0 100644
--- a/drivers/scsi/libsas/sas_init.c
+++ b/drivers/scsi/libsas/sas_init.c
@@ -1,26 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Serial Attached SCSI (SAS) Transport Layer initialization
*
* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
- *
- * This file is licensed under GPLv2.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
- *
*/
#include <linux/module.h>
@@ -36,23 +19,22 @@
#include "sas_internal.h"
-#include "../scsi_sas_internal.h"
+#include "scsi_sas_internal.h"
static struct kmem_cache *sas_task_cache;
+static struct kmem_cache *sas_event_cache;
struct sas_task *sas_alloc_task(gfp_t flags)
{
struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
if (task) {
- INIT_LIST_HEAD(&task->list);
spin_lock_init(&task->task_state_lock);
task->task_state_flags = SAS_TASK_STATE_PENDING;
}
return task;
}
-EXPORT_SYMBOL_GPL(sas_alloc_task);
struct sas_task *sas_alloc_slow_task(gfp_t flags)
{
@@ -67,71 +49,56 @@ struct sas_task *sas_alloc_slow_task(gfp_t flags)
}
task->slow_task = slow;
- init_timer(&slow->timer);
+ slow->task = task;
+ timer_setup(&slow->timer, NULL, 0);
init_completion(&slow->completion);
return task;
}
-EXPORT_SYMBOL_GPL(sas_alloc_slow_task);
void sas_free_task(struct sas_task *task)
{
if (task) {
- BUG_ON(!list_empty(&task->list));
kfree(task->slow_task);
kmem_cache_free(sas_task_cache, task);
}
}
-EXPORT_SYMBOL_GPL(sas_free_task);
/*------------ SAS addr hash -----------*/
void sas_hash_addr(u8 *hashed, const u8 *sas_addr)
{
- const u32 poly = 0x00DB2777;
- u32 r = 0;
- int i;
-
- for (i = 0; i < 8; i++) {
- int b;
- for (b = 7; b >= 0; b--) {
- r <<= 1;
- if ((1 << b) & sas_addr[i]) {
- if (!(r & 0x01000000))
- r ^= poly;
- } else if (r & 0x01000000)
- r ^= poly;
- }
- }
-
- hashed[0] = (r >> 16) & 0xFF;
- hashed[1] = (r >> 8) & 0xFF ;
- hashed[2] = r & 0xFF;
-}
-
-
-/* ---------- HA events ---------- */
+ const u32 poly = 0x00DB2777;
+ u32 r = 0;
+ int i;
-void sas_hae_reset(struct work_struct *work)
-{
- struct sas_ha_event *ev = to_sas_ha_event(work);
- struct sas_ha_struct *ha = ev->ha;
+ for (i = 0; i < SAS_ADDR_SIZE; i++) {
+ int b;
+
+ for (b = (SAS_ADDR_SIZE - 1); b >= 0; b--) {
+ r <<= 1;
+ if ((1 << b) & sas_addr[i]) {
+ if (!(r & 0x01000000))
+ r ^= poly;
+ } else if (r & 0x01000000) {
+ r ^= poly;
+ }
+ }
+ }
- clear_bit(HAE_RESET, &ha->pending);
+ hashed[0] = (r >> 16) & 0xFF;
+ hashed[1] = (r >> 8) & 0xFF;
+ hashed[2] = r & 0xFF;
}
int sas_register_ha(struct sas_ha_struct *sas_ha)
{
+ char name[64];
int error = 0;
mutex_init(&sas_ha->disco_mutex);
spin_lock_init(&sas_ha->phy_port_lock);
sas_hash_addr(sas_ha->hashed_sas_addr, sas_ha->sas_addr);
- if (sas_ha->lldd_queue_size == 0)
- sas_ha->lldd_queue_size = 1;
- else if (sas_ha->lldd_queue_size == -1)
- sas_ha->lldd_queue_size = 128; /* Sanity */
-
set_bit(SAS_HA_REGISTERED, &sas_ha->state);
spin_lock_init(&sas_ha->lock);
mutex_init(&sas_ha->drain_mutex);
@@ -139,44 +106,45 @@ int sas_register_ha(struct sas_ha_struct *sas_ha)
INIT_LIST_HEAD(&sas_ha->defer_q);
INIT_LIST_HEAD(&sas_ha->eh_dev_q);
+ sas_ha->event_thres = SAS_PHY_SHUTDOWN_THRES;
+
error = sas_register_phys(sas_ha);
if (error) {
- printk(KERN_NOTICE "couldn't register sas phys:%d\n", error);
+ pr_notice("couldn't register sas phys:%d\n", error);
return error;
}
error = sas_register_ports(sas_ha);
if (error) {
- printk(KERN_NOTICE "couldn't register sas ports:%d\n", error);
+ pr_notice("couldn't register sas ports:%d\n", error);
goto Undo_phys;
}
- error = sas_init_events(sas_ha);
- if (error) {
- printk(KERN_NOTICE "couldn't start event thread:%d\n", error);
+ error = -ENOMEM;
+ snprintf(name, sizeof(name), "%s_event_q", dev_name(sas_ha->dev));
+ sas_ha->event_q = alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, name);
+ if (!sas_ha->event_q)
goto Undo_ports;
- }
- if (sas_ha->lldd_max_execute_num > 1) {
- error = sas_init_queue(sas_ha);
- if (error) {
- printk(KERN_NOTICE "couldn't start queue thread:%d, "
- "running in direct mode\n", error);
- sas_ha->lldd_max_execute_num = 1;
- }
- }
+ snprintf(name, sizeof(name), "%s_disco_q", dev_name(sas_ha->dev));
+ sas_ha->disco_q = alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, name);
+ if (!sas_ha->disco_q)
+ goto Undo_event_q;
INIT_LIST_HEAD(&sas_ha->eh_done_q);
INIT_LIST_HEAD(&sas_ha->eh_ata_q);
return 0;
+Undo_event_q:
+ destroy_workqueue(sas_ha->event_q);
Undo_ports:
sas_unregister_ports(sas_ha);
Undo_phys:
return error;
}
+EXPORT_SYMBOL_GPL(sas_register_ha);
static void sas_disable_events(struct sas_ha_struct *sas_ha)
{
@@ -201,13 +169,12 @@ int sas_unregister_ha(struct sas_ha_struct *sas_ha)
__sas_drain_work(sas_ha);
mutex_unlock(&sas_ha->drain_mutex);
- if (sas_ha->lldd_max_execute_num > 1) {
- sas_shutdown_queue(sas_ha);
- sas_ha->lldd_max_execute_num = 1;
- }
+ destroy_workqueue(sas_ha->disco_q);
+ destroy_workqueue(sas_ha->event_q);
return 0;
}
+EXPORT_SYMBOL_GPL(sas_unregister_ha);
static int sas_get_linkerrors(struct sas_phy *phy)
{
@@ -216,7 +183,7 @@ static int sas_get_linkerrors(struct sas_phy *phy)
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number];
struct sas_internal *i =
- to_sas_internal(sas_ha->core.shost->transportt);
+ to_sas_internal(sas_ha->shost->transportt);
return i->dft->lldd_control_phy(asd_phy, PHY_FUNC_GET_EVENTS, NULL);
}
@@ -245,7 +212,7 @@ int sas_try_ata_reset(struct asd_sas_phy *asd_phy)
return -ENODEV;
}
-/**
+/*
* transport_sas_phy_reset - reset a phy and permit libata to manage the link
*
* phy reset request via sysfs in host workqueue context so we know we
@@ -265,7 +232,7 @@ static int transport_sas_phy_reset(struct sas_phy *phy, int hard_reset)
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number];
struct sas_internal *i =
- to_sas_internal(sas_ha->core.shost->transportt);
+ to_sas_internal(sas_ha->shost->transportt);
if (!hard_reset && sas_try_ata_reset(asd_phy) == 0)
return 0;
@@ -284,7 +251,7 @@ static int transport_sas_phy_reset(struct sas_phy *phy, int hard_reset)
}
}
-static int sas_phy_enable(struct sas_phy *phy, int enable)
+int sas_phy_enable(struct sas_phy *phy, int enable)
{
int ret;
enum phy_func cmd;
@@ -299,7 +266,7 @@ static int sas_phy_enable(struct sas_phy *phy, int enable)
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number];
struct sas_internal *i =
- to_sas_internal(sas_ha->core.shost->transportt);
+ to_sas_internal(sas_ha->shost->transportt);
if (enable)
ret = transport_sas_phy_reset(phy, 0);
@@ -316,6 +283,7 @@ static int sas_phy_enable(struct sas_phy *phy, int enable)
}
return ret;
}
+EXPORT_SYMBOL_GPL(sas_phy_enable);
int sas_phy_reset(struct sas_phy *phy, int hard_reset)
{
@@ -335,7 +303,7 @@ int sas_phy_reset(struct sas_phy *phy, int hard_reset)
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number];
struct sas_internal *i =
- to_sas_internal(sas_ha->core.shost->transportt);
+ to_sas_internal(sas_ha->shost->transportt);
ret = i->dft->lldd_control_phy(asd_phy, reset_type, NULL);
} else {
@@ -345,9 +313,10 @@ int sas_phy_reset(struct sas_phy *phy, int hard_reset)
}
return ret;
}
+EXPORT_SYMBOL_GPL(sas_phy_reset);
-int sas_set_phy_speed(struct sas_phy *phy,
- struct sas_phy_linkrates *rates)
+static int sas_set_phy_speed(struct sas_phy *phy,
+ struct sas_phy_linkrates *rates)
{
int ret;
@@ -370,7 +339,7 @@ int sas_set_phy_speed(struct sas_phy *phy,
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number];
struct sas_internal *i =
- to_sas_internal(sas_ha->core.shost->transportt);
+ to_sas_internal(sas_ha->shost->transportt);
ret = i->dft->lldd_control_phy(asd_phy, PHY_FUNC_SET_LINK_RATE,
rates);
@@ -390,14 +359,13 @@ void sas_prep_resume_ha(struct sas_ha_struct *ha)
int i;
set_bit(SAS_HA_REGISTERED, &ha->state);
+ set_bit(SAS_HA_RESUMING, &ha->state);
/* clear out any stale link events/data from the suspension path */
for (i = 0; i < ha->num_phys; i++) {
struct asd_sas_phy *phy = ha->sas_phy[i];
memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
- phy->port_events_pending = 0;
- phy->phy_events_pending = 0;
phy->frame_rcvd_size = 0;
}
}
@@ -417,7 +385,31 @@ static int phys_suspended(struct sas_ha_struct *ha)
return rc;
}
-void sas_resume_ha(struct sas_ha_struct *ha)
+static void sas_resume_insert_broadcast_ha(struct sas_ha_struct *ha)
+{
+ int i;
+
+ for (i = 0; i < ha->num_phys; i++) {
+ struct asd_sas_port *port = ha->sas_port[i];
+ struct domain_device *dev = port->port_dev;
+
+ if (dev && dev_is_expander(dev->dev_type)) {
+ struct asd_sas_phy *first_phy;
+
+ spin_lock(&port->phy_list_lock);
+ first_phy = list_first_entry_or_null(
+ &port->phy_list, struct asd_sas_phy,
+ port_phy_el);
+ spin_unlock(&port->phy_list_lock);
+
+ if (first_phy)
+ sas_notify_port_event(first_phy,
+ PORTE_BROADCAST_RCVD, GFP_KERNEL);
+ }
+ }
+}
+
+static void _sas_resume_ha(struct sas_ha_struct *ha, bool drain)
{
const unsigned long tmo = msecs_to_jiffies(25000);
int i;
@@ -438,24 +430,45 @@ void sas_resume_ha(struct sas_ha_struct *ha)
if (phy->suspended) {
dev_warn(&phy->phy->dev, "resume timeout\n");
- sas_notify_phy_event(phy, PHYE_RESUME_TIMEOUT);
+ sas_notify_phy_event(phy, PHYE_RESUME_TIMEOUT,
+ GFP_KERNEL);
}
}
/* all phys are back up or timed out, turn on i/o so we can
* flush out disks that did not return
*/
- scsi_unblock_requests(ha->core.shost);
- sas_drain_work(ha);
+ scsi_unblock_requests(ha->shost);
+ if (drain)
+ sas_drain_work(ha);
+ clear_bit(SAS_HA_RESUMING, &ha->state);
+
+ sas_queue_deferred_work(ha);
+ /* send event PORTE_BROADCAST_RCVD to identify some new inserted
+ * disks for expander
+ */
+ sas_resume_insert_broadcast_ha(ha);
+}
+
+void sas_resume_ha(struct sas_ha_struct *ha)
+{
+ _sas_resume_ha(ha, true);
}
EXPORT_SYMBOL(sas_resume_ha);
+/* A no-sync variant, which does not call sas_drain_ha(). */
+void sas_resume_ha_no_sync(struct sas_ha_struct *ha)
+{
+ _sas_resume_ha(ha, false);
+}
+EXPORT_SYMBOL(sas_resume_ha_no_sync);
+
void sas_suspend_ha(struct sas_ha_struct *ha)
{
int i;
sas_disable_events(ha);
- scsi_block_requests(ha->core.shost);
+ scsi_block_requests(ha->shost);
for (i = 0; i < ha->num_phys; i++) {
struct asd_sas_port *port = ha->sas_port[i];
@@ -515,6 +528,7 @@ static int queue_phy_reset(struct sas_phy *phy, int hard_reset)
if (!d)
return -ENOMEM;
+ pm_runtime_get_sync(ha->dev);
/* libsas workqueue coordinates ata-eh reset with discovery */
mutex_lock(&d->event_lock);
d->reset_result = 0;
@@ -528,6 +542,7 @@ static int queue_phy_reset(struct sas_phy *phy, int hard_reset)
if (rc == 0)
rc = d->reset_result;
mutex_unlock(&d->event_lock);
+ pm_runtime_put_sync(ha->dev);
return rc;
}
@@ -542,6 +557,7 @@ static int queue_phy_enable(struct sas_phy *phy, int enable)
if (!d)
return -ENOMEM;
+ pm_runtime_get_sync(ha->dev);
/* libsas workqueue coordinates ata-eh reset with discovery */
mutex_lock(&d->event_lock);
d->enable_result = 0;
@@ -555,6 +571,7 @@ static int queue_phy_enable(struct sas_phy *phy, int enable)
if (rc == 0)
rc = d->enable_result;
mutex_unlock(&d->event_lock);
+ pm_runtime_put_sync(ha->dev);
return rc;
}
@@ -569,6 +586,37 @@ static struct sas_function_template sft = {
.smp_handler = sas_smp_handler,
};
+static inline ssize_t phy_event_threshold_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", sha->event_thres);
+}
+
+static inline ssize_t phy_event_threshold_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
+
+ sha->event_thres = simple_strtol(buf, NULL, 10);
+
+ /* threshold cannot be set too small */
+ if (sha->event_thres < 32)
+ sha->event_thres = 32;
+
+ return count;
+}
+
+DEVICE_ATTR(phy_event_threshold,
+ S_IRUGO|S_IWUSR,
+ phy_event_threshold_show,
+ phy_event_threshold_store);
+EXPORT_SYMBOL_GPL(dev_attr_phy_event_threshold);
+
struct scsi_transport_template *
sas_domain_attach_transport(struct sas_domain_function_template *dft)
{
@@ -581,19 +629,53 @@ sas_domain_attach_transport(struct sas_domain_function_template *dft)
i = to_sas_internal(stt);
i->dft = dft;
stt->create_work_queue = 1;
- stt->eh_timed_out = sas_scsi_timed_out;
stt->eh_strategy_handler = sas_scsi_recover_host;
return stt;
}
EXPORT_SYMBOL_GPL(sas_domain_attach_transport);
+struct asd_sas_event *sas_alloc_event(struct asd_sas_phy *phy,
+ gfp_t gfp_flags)
+{
+ struct asd_sas_event *event;
+ struct sas_ha_struct *sas_ha = phy->ha;
+ struct sas_internal *i =
+ to_sas_internal(sas_ha->shost->transportt);
+
+ event = kmem_cache_zalloc(sas_event_cache, gfp_flags);
+ if (!event)
+ return NULL;
+
+ atomic_inc(&phy->event_nr);
+
+ if (atomic_read(&phy->event_nr) > phy->ha->event_thres) {
+ if (i->dft->lldd_control_phy) {
+ if (cmpxchg(&phy->in_shutdown, 0, 1) == 0) {
+ pr_notice("The phy%d bursting events, shut it down.\n",
+ phy->id);
+ sas_notify_phy_event(phy, PHYE_SHUTDOWN,
+ gfp_flags);
+ }
+ } else {
+ /* Do not support PHY control, stop allocating events */
+ WARN_ONCE(1, "PHY control not supported.\n");
+ kmem_cache_free(sas_event_cache, event);
+ atomic_dec(&phy->event_nr);
+ event = NULL;
+ }
+ }
-void sas_domain_release_transport(struct scsi_transport_template *stt)
+ return event;
+}
+
+void sas_free_event(struct asd_sas_event *event)
{
- sas_release_transport(stt);
+ struct asd_sas_phy *phy = event->phy;
+
+ kmem_cache_free(sas_event_cache, event);
+ atomic_dec(&phy->event_nr);
}
-EXPORT_SYMBOL_GPL(sas_domain_release_transport);
/* ---------- SAS Class register/unregister ---------- */
@@ -601,14 +683,23 @@ static int __init sas_class_init(void)
{
sas_task_cache = KMEM_CACHE(sas_task, SLAB_HWCACHE_ALIGN);
if (!sas_task_cache)
- return -ENOMEM;
+ goto out;
+
+ sas_event_cache = KMEM_CACHE(asd_sas_event, SLAB_HWCACHE_ALIGN);
+ if (!sas_event_cache)
+ goto free_task_kmem;
return 0;
+free_task_kmem:
+ kmem_cache_destroy(sas_task_cache);
+out:
+ return -ENOMEM;
}
static void __exit sas_class_exit(void)
{
kmem_cache_destroy(sas_task_cache);
+ kmem_cache_destroy(sas_event_cache);
}
MODULE_AUTHOR("Luben Tuikov <luben_tuikov@adaptec.com>");
@@ -618,5 +709,3 @@ MODULE_LICENSE("GPL v2");
module_init(sas_class_init);
module_exit(sas_class_exit);
-EXPORT_SYMBOL_GPL(sas_register_ha);
-EXPORT_SYMBOL_GPL(sas_unregister_ha);
generated by cgit (git 2.34.1) at 2025-12-22 00:31:12 +0000