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[SCSI] libsas: sas_phy_enable via transport_sas_phy_reset 

Execute the link-reset triggered by sas_phy_enable via
transport_sas_phy_reset so that it can be managed by libata.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Dan Williams 2011-12-04 00:06:57 -08:00 committed by James Bottomley
parent 81c757bc69
commit 2a559f4ba4
4 changed files with 52 additions and 10 deletions
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57
drivers/scsi/libsas/sas_init.c
View File

@ -249,15 +249,15 @@ static int transport_sas_phy_reset(struct sas_phy *phy, int hard_reset)
return ret;
}
int sas_phy_enable(struct sas_phy *phy, int enable)
static int sas_phy_enable(struct sas_phy *phy, int enable)
{
int ret;
enum phy_func command;
enum phy_func cmd;
if (enable)
command = PHY_FUNC_LINK_RESET;
cmd = PHY_FUNC_LINK_RESET;
else
command = PHY_FUNC_DISABLE;
cmd = PHY_FUNC_DISABLE;
if (scsi_is_sas_phy_local(phy)) {
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
@ -266,15 +266,21 @@ int sas_phy_enable(struct sas_phy *phy, int enable)
struct sas_internal *i =
to_sas_internal(sas_ha->core.shost->transportt);
if (!enable) {
if (enable)
ret = transport_sas_phy_reset(phy, 0);
else {
sas_phy_disconnected(asd_phy);
sas_ha->notify_phy_event(asd_phy, PHYE_LOSS_OF_SIGNAL);
ret = i->dft->lldd_control_phy(asd_phy, cmd, NULL);
}
ret = i->dft->lldd_control_phy(asd_phy, command, NULL);
} else {
struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
struct domain_device *ddev = sas_find_dev_by_rphy(rphy);
ret = sas_smp_phy_control(ddev, phy->number, command, NULL);
if (enable)
ret = transport_sas_phy_reset(phy, 0);
else
ret = sas_smp_phy_control(ddev, phy->number, cmd, NULL);
}
return ret;
}
@ -357,6 +363,13 @@ static void phy_reset_work(struct work_struct *work)
d->reset_result = transport_sas_phy_reset(d->phy, d->hard_reset);
}
static void phy_enable_work(struct work_struct *work)
{
struct sas_phy_data *d = container_of(work, typeof(*d), enable_work);
d->enable_result = sas_phy_enable(d->phy, d->enable);
}
static int sas_phy_setup(struct sas_phy *phy)
{
struct sas_phy_data *d = kzalloc(sizeof(*d), GFP_KERNEL);
@ -366,6 +379,7 @@ static int sas_phy_setup(struct sas_phy *phy)
mutex_init(&d->event_lock);
INIT_WORK(&d->reset_work, phy_reset_work);
INIT_WORK(&d->enable_work, phy_enable_work);
d->phy = phy;
phy->hostdata = d;
@ -399,8 +413,35 @@ static int queue_phy_reset(struct sas_phy *phy, int hard_reset)
return rc;
}
static int queue_phy_enable(struct sas_phy *phy, int enable)
{
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
struct sas_phy_data *d = phy->hostdata;
int rc;
if (!d)
return -ENOMEM;
/* libsas workqueue coordinates ata-eh reset with discovery */
mutex_lock(&d->event_lock);
d->enable_result = 0;
d->enable = enable;
spin_lock_irq(&ha->state_lock);
sas_queue_work(ha, &d->enable_work);
spin_unlock_irq(&ha->state_lock);
rc = sas_drain_work(ha);
if (rc == 0)
rc = d->enable_result;
mutex_unlock(&d->event_lock);
return rc;
}
static struct sas_function_template sft = {
.phy_enable = sas_phy_enable,
.phy_enable = queue_phy_enable,
.phy_reset = queue_phy_reset,
.phy_setup = sas_phy_setup,
.phy_release = sas_phy_release,

3
drivers/scsi/libsas/sas_internal.h
View File

@ -45,6 +45,9 @@ struct sas_phy_data {
int hard_reset;
int reset_result;
struct work_struct reset_work;
int enable;
int enable_result;
struct work_struct enable_work;
};
void sas_scsi_recover_host(struct Scsi_Host *shost);

1
drivers/scsi/libsas/sas_scsi_host.c
View File

@ -1077,7 +1077,6 @@ EXPORT_SYMBOL_GPL(sas_change_queue_type);
EXPORT_SYMBOL_GPL(sas_bios_param);
EXPORT_SYMBOL_GPL(sas_task_abort);
EXPORT_SYMBOL_GPL(sas_phy_reset);
EXPORT_SYMBOL_GPL(sas_phy_enable);
EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler);
EXPORT_SYMBOL_GPL(sas_eh_bus_reset_handler);
EXPORT_SYMBOL_GPL(sas_slave_alloc);

1
include/scsi/libsas.h
View File

@ -634,7 +634,6 @@ extern int sas_unregister_ha(struct sas_ha_struct *);
int sas_set_phy_speed(struct sas_phy *phy,
struct sas_phy_linkrates *rates);
int sas_phy_enable(struct sas_phy *phy, int enabled);
int sas_phy_reset(struct sas_phy *phy, int hard_reset);
int sas_queue_up(struct sas_task *task);
extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);