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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/scsi/libsas/sas_event.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/scsi/libsas/sas_event.c')
-rw-r--r--drivers/scsi/libsas/sas_event.c216
1 files changed, 216 insertions, 0 deletions
diff --git a/drivers/scsi/libsas/sas_event.c b/drivers/scsi/libsas/sas_event.c
new file mode 100644
index 000000000..f3a17191a
--- /dev/null
+++ b/drivers/scsi/libsas/sas_event.c
@@ -0,0 +1,216 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Serial Attached SCSI (SAS) Event processing
+ *
+ * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
+ * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
+ */
+
+#include <linux/export.h>
+#include <scsi/scsi_host.h>
+#include "sas_internal.h"
+
+bool sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw)
+{
+ if (!test_bit(SAS_HA_REGISTERED, &ha->state))
+ return false;
+
+ if (test_bit(SAS_HA_DRAINING, &ha->state)) {
+ /* add it to the defer list, if not already pending */
+ if (list_empty(&sw->drain_node))
+ list_add_tail(&sw->drain_node, &ha->defer_q);
+ return true;
+ }
+
+ return queue_work(ha->event_q, &sw->work);
+}
+
+static bool sas_queue_event(int event, struct sas_work *work,
+ struct sas_ha_struct *ha)
+{
+ unsigned long flags;
+ bool rc;
+
+ spin_lock_irqsave(&ha->lock, flags);
+ rc = sas_queue_work(ha, work);
+ spin_unlock_irqrestore(&ha->lock, flags);
+
+ return rc;
+}
+
+void sas_queue_deferred_work(struct sas_ha_struct *ha)
+{
+ struct sas_work *sw, *_sw;
+
+ spin_lock_irq(&ha->lock);
+ list_for_each_entry_safe(sw, _sw, &ha->defer_q, drain_node) {
+ list_del_init(&sw->drain_node);
+
+ if (!sas_queue_work(ha, sw)) {
+ pm_runtime_put(ha->dev);
+ sas_free_event(to_asd_sas_event(&sw->work));
+ }
+ }
+ spin_unlock_irq(&ha->lock);
+}
+
+void __sas_drain_work(struct sas_ha_struct *ha)
+{
+ set_bit(SAS_HA_DRAINING, &ha->state);
+ /* flush submitters */
+ spin_lock_irq(&ha->lock);
+ spin_unlock_irq(&ha->lock);
+
+ drain_workqueue(ha->event_q);
+ drain_workqueue(ha->disco_q);
+
+ clear_bit(SAS_HA_DRAINING, &ha->state);
+ sas_queue_deferred_work(ha);
+}
+
+int sas_drain_work(struct sas_ha_struct *ha)
+{
+ int err;
+
+ err = mutex_lock_interruptible(&ha->drain_mutex);
+ if (err)
+ return err;
+ if (test_bit(SAS_HA_REGISTERED, &ha->state))
+ __sas_drain_work(ha);
+ mutex_unlock(&ha->drain_mutex);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(sas_drain_work);
+
+void sas_disable_revalidation(struct sas_ha_struct *ha)
+{
+ mutex_lock(&ha->disco_mutex);
+ set_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state);
+ mutex_unlock(&ha->disco_mutex);
+}
+
+void sas_enable_revalidation(struct sas_ha_struct *ha)
+{
+ int i;
+
+ mutex_lock(&ha->disco_mutex);
+ clear_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state);
+ for (i = 0; i < ha->num_phys; i++) {
+ struct asd_sas_port *port = ha->sas_port[i];
+ const int ev = DISCE_REVALIDATE_DOMAIN;
+ struct sas_discovery *d = &port->disc;
+ struct asd_sas_phy *sas_phy;
+
+ if (!test_and_clear_bit(ev, &d->pending))
+ continue;
+
+ spin_lock(&port->phy_list_lock);
+ if (list_empty(&port->phy_list)) {
+ spin_unlock(&port->phy_list_lock);
+ continue;
+ }
+
+ sas_phy = container_of(port->phy_list.next, struct asd_sas_phy,
+ port_phy_el);
+ spin_unlock(&port->phy_list_lock);
+ sas_notify_port_event(sas_phy,
+ PORTE_BROADCAST_RCVD, GFP_KERNEL);
+ }
+ mutex_unlock(&ha->disco_mutex);
+}
+
+
+static void sas_port_event_worker(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+ struct sas_ha_struct *ha = phy->ha;
+
+ sas_port_event_fns[ev->event](work);
+ pm_runtime_put(ha->dev);
+ sas_free_event(ev);
+}
+
+static void sas_phy_event_worker(struct work_struct *work)
+{
+ struct asd_sas_event *ev = to_asd_sas_event(work);
+ struct asd_sas_phy *phy = ev->phy;
+ struct sas_ha_struct *ha = phy->ha;
+
+ sas_phy_event_fns[ev->event](work);
+ pm_runtime_put(ha->dev);
+ sas_free_event(ev);
+}
+
+/* defer works of new phys during suspend */
+static bool sas_defer_event(struct asd_sas_phy *phy, struct asd_sas_event *ev)
+{
+ struct sas_ha_struct *ha = phy->ha;
+ unsigned long flags;
+ bool deferred = false;
+
+ spin_lock_irqsave(&ha->lock, flags);
+ if (test_bit(SAS_HA_RESUMING, &ha->state) && !phy->suspended) {
+ struct sas_work *sw = &ev->work;
+
+ list_add_tail(&sw->drain_node, &ha->defer_q);
+ deferred = true;
+ }
+ spin_unlock_irqrestore(&ha->lock, flags);
+ return deferred;
+}
+
+void sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event,
+ gfp_t gfp_flags)
+{
+ struct sas_ha_struct *ha = phy->ha;
+ struct asd_sas_event *ev;
+
+ BUG_ON(event >= PORT_NUM_EVENTS);
+
+ ev = sas_alloc_event(phy, gfp_flags);
+ if (!ev)
+ return;
+
+ /* Call pm_runtime_put() with pairs in sas_port_event_worker() */
+ pm_runtime_get_noresume(ha->dev);
+
+ INIT_SAS_EVENT(ev, sas_port_event_worker, phy, event);
+
+ if (sas_defer_event(phy, ev))
+ return;
+
+ if (!sas_queue_event(event, &ev->work, ha)) {
+ pm_runtime_put(ha->dev);
+ sas_free_event(ev);
+ }
+}
+EXPORT_SYMBOL_GPL(sas_notify_port_event);
+
+void sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event,
+ gfp_t gfp_flags)
+{
+ struct sas_ha_struct *ha = phy->ha;
+ struct asd_sas_event *ev;
+
+ BUG_ON(event >= PHY_NUM_EVENTS);
+
+ ev = sas_alloc_event(phy, gfp_flags);
+ if (!ev)
+ return;
+
+ /* Call pm_runtime_put() with pairs in sas_phy_event_worker() */
+ pm_runtime_get_noresume(ha->dev);
+
+ INIT_SAS_EVENT(ev, sas_phy_event_worker, phy, event);
+
+ if (sas_defer_event(phy, ev))
+ return;
+
+ if (!sas_queue_event(event, &ev->work, ha)) {
+ pm_runtime_put(ha->dev);
+ sas_free_event(ev);
+ }
+}
+EXPORT_SYMBOL_GPL(sas_notify_phy_event);