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scsi: hisi_sas: Use device lock to protect slot alloc/free

Browse source 
The IPTT of a slot is unique, and we currently use hisi_hba lock to
protect it.

Now slot is managed on hisi_sas_device.list, so use DQ lock to protect
for allocating and freeing the slot.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Xiang Chen 2018-05-09 23:10:49 +08:00 committed by Martin K. Petersen
parent fa222db0b0
commit e85d93b212
2 changed files with 16 additions and 43 deletions
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56
drivers/scsi/hisi_sas/hisi_sas_main.c
View file

@ -214,6 +214,8 @@ static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
struct hisi_sas_slot *slot)
{
struct hisi_sas_dq *dq = &hisi_hba->dq[slot->dlvry_queue];
unsigned long flags;
if (task) {
struct device *dev = hisi_hba->dev;
@ -233,11 +235,15 @@ void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
if (slot->buf)
dma_pool_free(hisi_hba->buffer_pool, slot->buf, slot->buf_dma);
spin_lock_irqsave(&dq->lock, flags);
list_del_init(&slot->entry);
spin_unlock_irqrestore(&dq->lock, flags);
slot->buf = NULL;
slot->task = NULL;
slot->port = NULL;
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_slot_index_free(hisi_hba, slot->idx);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
/* slot memory is fully zeroed when it is reused */
}
@ -286,7 +292,6 @@ static void hisi_sas_slot_abort(struct work_struct *work)
struct scsi_lun lun;
struct device *dev = hisi_hba->dev;
int tag = abort_slot->idx;
unsigned long flags;
if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
dev_err(dev, "cannot abort slot for non-ssp task\n");
@ -300,9 +305,7 @@ static void hisi_sas_slot_abort(struct work_struct *work)
hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
out:
/* Do cleanup for this task */
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
if (task->task_done)
task->task_done(task);
}
@ -471,9 +474,9 @@ static int hisi_sas_task_prep(struct sas_task *task, struct hisi_sas_dq *dq,
break;
}
spin_lock_irqsave(&hisi_hba->lock, flags);
spin_lock_irqsave(&dq->lock, flags);
list_add_tail(&slot->entry, &sas_dev->list);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
spin_unlock_irqrestore(&dq->lock, flags);
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags |= SAS_TASK_AT_INITIATOR;
spin_unlock_irqrestore(&task->task_state_lock, flags);
@ -1047,7 +1050,6 @@ static int hisi_sas_softreset_ata_disk(struct domain_device *device)
struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
struct device *dev = hisi_hba->dev;
int s = sizeof(struct host_to_dev_fis);
unsigned long flags;
ata_for_each_link(link, ap, EDGE) {
int pmp = sata_srst_pmp(link);
@ -1072,11 +1074,8 @@ static int hisi_sas_softreset_ata_disk(struct domain_device *device)
dev_err(dev, "ata disk reset failed\n");
}
if (rc == TMF_RESP_FUNC_COMPLETE) {
spin_lock_irqsave(&hisi_hba->lock, flags);
if (rc == TMF_RESP_FUNC_COMPLETE)
hisi_sas_release_task(hisi_hba, device);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
return rc;
}
@ -1173,7 +1172,6 @@ static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
struct device *dev = hisi_hba->dev;
struct Scsi_Host *shost = hisi_hba->shost;
u32 old_state, state;
unsigned long flags;
int rc;
if (!hisi_hba->hw->soft_reset)
@ -1197,9 +1195,7 @@ static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
scsi_unblock_requests(shost);
goto out;
}
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_release_tasks(hisi_hba);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
@ -1274,11 +1270,8 @@ static int hisi_sas_abort_task(struct sas_task *task)
* will have already been completed
*/
if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
if (task->lldd_task) {
spin_lock_irqsave(&hisi_hba->lock, flags);
if (task->lldd_task)
hisi_sas_do_release_task(hisi_hba, task, slot);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
}
} else if (task->task_proto & SAS_PROTOCOL_SATA ||
task->task_proto & SAS_PROTOCOL_STP) {
@ -1300,11 +1293,8 @@ static int hisi_sas_abort_task(struct sas_task *task)
rc = hisi_sas_internal_task_abort(hisi_hba, device,
HISI_SAS_INT_ABT_CMD, tag);
if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
task->lldd_task) {
spin_lock_irqsave(&hisi_hba->lock, flags);
task->lldd_task)
hisi_sas_do_release_task(hisi_hba, task, slot);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
}
out:
@ -1319,7 +1309,6 @@ static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
struct device *dev = hisi_hba->dev;
struct hisi_sas_tmf_task tmf_task;
int rc = TMF_RESP_FUNC_FAILED;
unsigned long flags;
rc = hisi_sas_internal_task_abort(hisi_hba, device,
HISI_SAS_INT_ABT_DEV, 0);
@ -1332,11 +1321,8 @@ static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
tmf_task.tmf = TMF_ABORT_TASK_SET;
rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
if (rc == TMF_RESP_FUNC_COMPLETE) {
spin_lock_irqsave(&hisi_hba->lock, flags);
if (rc == TMF_RESP_FUNC_COMPLETE)
hisi_sas_release_task(hisi_hba, device);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
return rc;
}
@ -1369,7 +1355,6 @@ static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
struct device *dev = hisi_hba->dev;
int rc = TMF_RESP_FUNC_FAILED;
unsigned long flags;
if (sas_dev->dev_status != HISI_SAS_DEV_EH)
return TMF_RESP_FUNC_FAILED;
@ -1385,11 +1370,9 @@ static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
rc = hisi_sas_debug_I_T_nexus_reset(device);
if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV)) {
spin_lock_irqsave(&hisi_hba->lock, flags);
if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
hisi_sas_release_task(hisi_hba, device);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
return rc;
}
@ -1398,7 +1381,6 @@ static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
struct device *dev = hisi_hba->dev;
unsigned long flags;
int rc = TMF_RESP_FUNC_FAILED;
sas_dev->dev_status = HISI_SAS_DEV_EH;
@ -1418,11 +1400,8 @@ static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
rc = sas_phy_reset(phy, 1);
if (rc == 0) {
spin_lock_irqsave(&hisi_hba->lock, flags);
if (rc == 0)
hisi_sas_release_task(hisi_hba, device);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
sas_put_local_phy(phy);
} else {
struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
@ -1436,11 +1415,8 @@ static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
hisi_sas_dereg_device(hisi_hba, device);
rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
if (rc == TMF_RESP_FUNC_COMPLETE) {
spin_lock_irqsave(&hisi_hba->lock, flags);
if (rc == TMF_RESP_FUNC_COMPLETE)
hisi_sas_release_task(hisi_hba, device);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
}
out:
if (rc != TMF_RESP_FUNC_COMPLETE)

3
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
View file

@ -2373,7 +2373,6 @@ static int hisi_sas_v3_suspend(struct pci_dev *pdev, pm_message_t state)
u32 device_state, status;
int rc;
u32 reg_val;
unsigned long flags;
if (!pdev->pm_cap) {
dev_err(dev, "PCI PM not supported\n");
@ -2418,9 +2417,7 @@ static int hisi_sas_v3_suspend(struct pci_dev *pdev, pm_message_t state)
pci_disable_device(pdev);
pci_set_power_state(pdev, device_state);
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_release_tasks(hisi_hba);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
sas_suspend_ha(sha);
return 0;