drivers/scsi/libsas/sas_event.c

Source file repositories/reference/linux-study-clean/drivers/scsi/libsas/sas_event.c

File Facts

System
Linux kernel
Corpus path
drivers/scsi/libsas/sas_event.c
Extension
.c
Size
5062 bytes
Lines
217
Domain
Driver Families
Bucket
drivers/scsi
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

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;

Annotation

Implementation Notes