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Diffstat (limited to 'drivers/scsi/libsas/sas_init.c')
-rw-r--r--drivers/scsi/libsas/sas_init.c166
1 files changed, 97 insertions, 69 deletions
diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c
index 221340ee8651..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>
@@ -36,7 +19,7 @@
#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;
@@ -52,7 +35,6 @@ struct sas_task *sas_alloc_task(gfp_t flags)
return task;
}
-EXPORT_SYMBOL_GPL(sas_alloc_task);
struct sas_task *sas_alloc_slow_task(gfp_t flags)
{
@@ -73,7 +55,6 @@ struct sas_task *sas_alloc_slow_task(gfp_t flags)
return task;
}
-EXPORT_SYMBOL_GPL(sas_alloc_slow_task);
void sas_free_task(struct sas_task *task)
{
@@ -82,30 +63,31 @@ void sas_free_task(struct sas_task *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;
+ const u32 poly = 0x00DB2777;
+ u32 r = 0;
+ int i;
+
+ for (i = 0; i < SAS_ADDR_SIZE; i++) {
+ int b;
- 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;
- }
- }
+ 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;
+ }
+ }
+ }
- hashed[0] = (r >> 16) & 0xFF;
- hashed[1] = (r >> 8) & 0xFF ;
- hashed[2] = r & 0xFF;
+ hashed[0] = (r >> 16) & 0xFF;
+ hashed[1] = (r >> 8) & 0xFF;
+ hashed[2] = r & 0xFF;
}
int sas_register_ha(struct sas_ha_struct *sas_ha)
@@ -138,20 +120,14 @@ int sas_register_ha(struct sas_ha_struct *sas_ha)
goto Undo_phys;
}
- error = sas_init_events(sas_ha);
- if (error) {
- pr_notice("couldn't start event thread:%d\n", error);
- goto Undo_ports;
- }
-
error = -ENOMEM;
snprintf(name, sizeof(name), "%s_event_q", dev_name(sas_ha->dev));
- sas_ha->event_q = create_singlethread_workqueue(name);
+ sas_ha->event_q = alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, name);
if (!sas_ha->event_q)
goto Undo_ports;
snprintf(name, sizeof(name), "%s_disco_q", dev_name(sas_ha->dev));
- sas_ha->disco_q = create_singlethread_workqueue(name);
+ sas_ha->disco_q = alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, name);
if (!sas_ha->disco_q)
goto Undo_event_q;
@@ -168,6 +144,7 @@ Undo_phys:
return error;
}
+EXPORT_SYMBOL_GPL(sas_register_ha);
static void sas_disable_events(struct sas_ha_struct *sas_ha)
{
@@ -197,6 +174,7 @@ int sas_unregister_ha(struct sas_ha_struct *sas_ha)
return 0;
}
+EXPORT_SYMBOL_GPL(sas_unregister_ha);
static int sas_get_linkerrors(struct sas_phy *phy)
{
@@ -205,7 +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);
}
@@ -254,7 +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;
@@ -273,7 +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;
@@ -288,7 +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);
@@ -305,6 +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)
{
@@ -324,7 +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 {
@@ -334,9 +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;
@@ -359,7 +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);
@@ -379,6 +359,7 @@ 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++) {
@@ -404,7 +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;
@@ -425,24 +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];
@@ -502,6 +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;
@@ -515,6 +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;
}
@@ -529,6 +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;
@@ -542,6 +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;
}
@@ -605,16 +635,15 @@ sas_domain_attach_transport(struct sas_domain_function_template *dft)
}
EXPORT_SYMBOL_GPL(sas_domain_attach_transport);
-
-struct asd_sas_event *sas_alloc_event(struct asd_sas_phy *phy)
+struct asd_sas_event *sas_alloc_event(struct asd_sas_phy *phy,
+ gfp_t gfp_flags)
{
struct asd_sas_event *event;
- gfp_t flags = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
struct sas_ha_struct *sas_ha = phy->ha;
struct sas_internal *i =
- to_sas_internal(sas_ha->core.shost->transportt);
+ to_sas_internal(sas_ha->shost->transportt);
- event = kmem_cache_zalloc(sas_event_cache, flags);
+ event = kmem_cache_zalloc(sas_event_cache, gfp_flags);
if (!event)
return NULL;
@@ -623,9 +652,10 @@ struct asd_sas_event *sas_alloc_event(struct asd_sas_phy *phy)
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%02d bursting events, shut it down.\n",
+ pr_notice("The phy%d bursting events, shut it down.\n",
phy->id);
- sas_notify_phy_event(phy, PHYE_SHUTDOWN);
+ sas_notify_phy_event(phy, PHYE_SHUTDOWN,
+ gfp_flags);
}
} else {
/* Do not support PHY control, stop allocating events */
@@ -679,5 +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 10:39:27 +0000