scsi: hisi_sas: Factor out task prep and delivery code
The task prep code is the same between the normal path (in
hisi_sas_task_prep()) and the internal abort path, so factor is out into a
common function.
Link: https://lore.kernel.org/r/1639579061-179473-5-git-send-email-john.garry@huawei.com
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 9bad59e..8df1fd6 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -395,25 +395,122 @@ static int hisi_sas_dif_dma_map(struct hisi_hba *hisi_hba,
return rc;
}
-static int hisi_sas_task_prep(struct sas_task *task,
- struct hisi_sas_dq **dq_pointer,
- bool is_tmf, struct hisi_sas_tmf_task *tmf)
+static
+void hisi_sas_task_deliver(struct hisi_hba *hisi_hba,
+ struct hisi_sas_slot *slot,
+ struct hisi_sas_dq *dq,
+ struct hisi_sas_device *sas_dev,
+ struct hisi_sas_internal_abort *abort,
+ struct hisi_sas_tmf_task *tmf)
{
- struct domain_device *device = task->dev;
- struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
- struct hisi_sas_device *sas_dev = device->lldd_dev;
- struct hisi_sas_port *port;
- struct hisi_sas_slot *slot;
- struct hisi_sas_cmd_hdr *cmd_hdr_base;
- struct asd_sas_port *sas_port = device->port;
- struct device *dev = hisi_hba->dev;
- int dlvry_queue_slot, dlvry_queue, rc, slot_idx;
- int n_elem = 0, n_elem_dif = 0, n_elem_req = 0;
- struct scsi_cmnd *scmd = NULL;
- struct hisi_sas_dq *dq;
+ struct hisi_sas_cmd_hdr *cmd_hdr_base;
+ int dlvry_queue_slot, dlvry_queue;
+ struct sas_task *task = slot->task;
unsigned long flags;
int wr_q_index;
+ spin_lock(&dq->lock);
+ wr_q_index = dq->wr_point;
+ dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
+ list_add_tail(&slot->delivery, &dq->list);
+ spin_unlock(&dq->lock);
+ spin_lock(&sas_dev->lock);
+ list_add_tail(&slot->entry, &sas_dev->list);
+ spin_unlock(&sas_dev->lock);
+
+ dlvry_queue = dq->id;
+ dlvry_queue_slot = wr_q_index;
+
+ slot->device_id = sas_dev->device_id;
+ slot->dlvry_queue = dlvry_queue;
+ slot->dlvry_queue_slot = dlvry_queue_slot;
+ cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
+ slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
+
+ slot->tmf = tmf;
+ slot->is_internal = tmf;
+ task->lldd_task = slot;
+
+ memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
+ memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
+ memset(hisi_sas_status_buf_addr_mem(slot), 0,
+ sizeof(struct hisi_sas_err_record));
+
+ switch (task->task_proto) {
+ case SAS_PROTOCOL_SMP:
+ hisi_sas_task_prep_smp(hisi_hba, slot);
+ break;
+ case SAS_PROTOCOL_SSP:
+ hisi_sas_task_prep_ssp(hisi_hba, slot);
+ break;
+ case SAS_PROTOCOL_SATA:
+ case SAS_PROTOCOL_STP:
+ case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
+ hisi_sas_task_prep_ata(hisi_hba, slot);
+ break;
+ case SAS_PROTOCOL_NONE:
+ if (abort) {
+ hisi_sas_task_prep_abort(hisi_hba, abort, slot, sas_dev->device_id);
+ break;
+ }
+ fallthrough;
+ default:
+ dev_err(hisi_hba->dev, "task prep: unknown/unsupported proto (0x%x)\n",
+ task->task_proto);
+ break;
+ }
+
+ spin_lock_irqsave(&task->task_state_lock, flags);
+ task->task_state_flags |= SAS_TASK_AT_INITIATOR;
+ spin_unlock_irqrestore(&task->task_state_lock, flags);
+
+ WRITE_ONCE(slot->ready, 1);
+
+ spin_lock(&dq->lock);
+ hisi_hba->hw->start_delivery(dq);
+ spin_unlock(&dq->lock);
+}
+
+static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
+ struct hisi_sas_tmf_task *tmf)
+{
+ int n_elem = 0, n_elem_dif = 0, n_elem_req = 0;
+ struct domain_device *device = task->dev;
+ struct asd_sas_port *sas_port = device->port;
+ struct hisi_sas_device *sas_dev = device->lldd_dev;
+ struct scsi_cmnd *scmd = NULL;
+ struct hisi_sas_dq *dq = NULL;
+ struct hisi_sas_port *port;
+ struct hisi_hba *hisi_hba;
+ struct hisi_sas_slot *slot;
+ struct device *dev;
+ int rc;
+
+ if (!sas_port) {
+ struct task_status_struct *ts = &task->task_status;
+
+ ts->resp = SAS_TASK_UNDELIVERED;
+ ts->stat = SAS_PHY_DOWN;
+ /*
+ * libsas will use dev->port, should
+ * not call task_done for sata
+ */
+ if (device->dev_type != SAS_SATA_DEV)
+ task->task_done(task);
+ return -ECOMM;
+ }
+
+ hisi_hba = dev_to_hisi_hba(device);
+ dev = hisi_hba->dev;
+
+ if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
+ if (!gfpflags_allow_blocking(gfp_flags))
+ return -EINVAL;
+
+ down(&hisi_hba->sem);
+ up(&hisi_hba->sem);
+ }
+
if (DEV_IS_GONE(sas_dev)) {
if (sas_dev)
dev_info(dev, "task prep: device %d not ready\n",
@@ -442,13 +539,13 @@ static int hisi_sas_task_prep(struct sas_task *task,
blk_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd));
dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
- *dq_pointer = dq = &hisi_hba->dq[dq_index];
+ dq = &hisi_hba->dq[dq_index];
} else {
struct Scsi_Host *shost = hisi_hba->shost;
struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT];
int queue = qmap->mq_map[raw_smp_processor_id()];
- *dq_pointer = dq = &hisi_hba->dq[queue];
+ dq = &hisi_hba->dq[queue];
}
port = to_hisi_sas_port(sas_port);
@@ -480,66 +577,17 @@ static int hisi_sas_task_prep(struct sas_task *task,
if (rc < 0)
goto err_out_dif_dma_unmap;
- slot_idx = rc;
- slot = &hisi_hba->slot_info[slot_idx];
-
- spin_lock(&dq->lock);
- wr_q_index = dq->wr_point;
- dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
- list_add_tail(&slot->delivery, &dq->list);
- spin_unlock(&dq->lock);
- spin_lock(&sas_dev->lock);
- list_add_tail(&slot->entry, &sas_dev->list);
- spin_unlock(&sas_dev->lock);
-
- dlvry_queue = dq->id;
- dlvry_queue_slot = wr_q_index;
-
- slot->device_id = sas_dev->device_id;
+ slot = &hisi_hba->slot_info[rc];
slot->n_elem = n_elem;
slot->n_elem_dif = n_elem_dif;
- slot->dlvry_queue = dlvry_queue;
- slot->dlvry_queue_slot = dlvry_queue_slot;
- cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
- slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
slot->task = task;
slot->port = port;
+
slot->tmf = tmf;
- slot->is_internal = is_tmf;
- task->lldd_task = slot;
+ slot->is_internal = tmf;
- memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
- memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
- memset(hisi_sas_status_buf_addr_mem(slot), 0,
- sizeof(struct hisi_sas_err_record));
-
- switch (task->task_proto) {
- case SAS_PROTOCOL_SMP:
- hisi_sas_task_prep_smp(hisi_hba, slot);
- break;
- case SAS_PROTOCOL_SSP:
- hisi_sas_task_prep_ssp(hisi_hba, slot);
- break;
- case SAS_PROTOCOL_SATA:
- case SAS_PROTOCOL_STP:
- case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
- hisi_sas_task_prep_ata(hisi_hba, slot);
- break;
- default:
- dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
- task->task_proto);
- break;
- }
-
- spin_lock_irqsave(&task->task_state_lock, flags);
- task->task_state_flags |= SAS_TASK_AT_INITIATOR;
- spin_unlock_irqrestore(&task->task_state_lock, flags);
-
- WRITE_ONCE(slot->ready, 1);
-
- spin_lock(&dq->lock);
- hisi_hba->hw->start_delivery(dq);
- spin_unlock(&dq->lock);
+ /* protect task_prep and start_delivery sequence */
+ hisi_sas_task_deliver(hisi_hba, slot, dq, sas_dev, NULL, tmf);
return 0;
@@ -548,52 +596,9 @@ static int hisi_sas_task_prep(struct sas_task *task,
hisi_sas_dif_dma_unmap(hisi_hba, task, n_elem_dif);
err_out_dma_unmap:
hisi_sas_dma_unmap(hisi_hba, task, n_elem,
- n_elem_req);
+ n_elem_req);
prep_out:
- dev_err(dev, "task prep: failed[%d]!\n", rc);
- return rc;
-}
-
-static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
- bool is_tmf, struct hisi_sas_tmf_task *tmf)
-{
- u32 rc;
- struct hisi_hba *hisi_hba;
- struct device *dev;
- struct domain_device *device = task->dev;
- struct asd_sas_port *sas_port = device->port;
- struct hisi_sas_dq *dq = NULL;
-
- if (!sas_port) {
- struct task_status_struct *ts = &task->task_status;
-
- ts->resp = SAS_TASK_UNDELIVERED;
- ts->stat = SAS_PHY_DOWN;
- /*
- * libsas will use dev->port, should
- * not call task_done for sata
- */
- if (device->dev_type != SAS_SATA_DEV)
- task->task_done(task);
- return -ECOMM;
- }
-
- hisi_hba = dev_to_hisi_hba(device);
- dev = hisi_hba->dev;
-
- if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
- if (!gfpflags_allow_blocking(gfp_flags))
- return -EINVAL;
-
- down(&hisi_hba->sem);
- up(&hisi_hba->sem);
- }
-
- /* protect task_prep and start_delivery sequence */
- rc = hisi_sas_task_prep(task, &dq, is_tmf, tmf);
- if (rc)
- dev_err(dev, "task exec: failed[%d]!\n", rc);
-
+ dev_err(dev, "task exec: failed[%d]!\n", rc);
return rc;
}
@@ -1092,7 +1097,7 @@ static void hisi_sas_dev_gone(struct domain_device *device)
static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
{
- return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
+ return hisi_sas_task_exec(task, gfp_flags, NULL);
}
static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
@@ -1246,8 +1251,7 @@ static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
task->slow_task->timer.expires = jiffies + TASK_TIMEOUT;
add_timer(&task->slow_task->timer);
- res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
-
+ res = hisi_sas_task_exec(task, GFP_KERNEL, tmf);
if (res) {
del_timer_sync(&task->slow_task->timer);
dev_err(dev, "abort tmf: executing internal task failed: %d\n",
@@ -2016,12 +2020,9 @@ hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct device *dev = hisi_hba->dev;
struct hisi_sas_port *port;
- struct hisi_sas_slot *slot;
struct asd_sas_port *sas_port = device->port;
- struct hisi_sas_cmd_hdr *cmd_hdr_base;
- int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
- unsigned long flags;
- int wr_q_index;
+ struct hisi_sas_slot *slot;
+ int slot_idx;
if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
return -EINVAL;
@@ -2032,58 +2033,24 @@ hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
port = to_hisi_sas_port(sas_port);
/* simply get a slot and send abort command */
- rc = hisi_sas_slot_index_alloc(hisi_hba, NULL);
- if (rc < 0)
+ slot_idx = hisi_sas_slot_index_alloc(hisi_hba, NULL);
+ if (slot_idx < 0)
goto err_out;
- slot_idx = rc;
slot = &hisi_hba->slot_info[slot_idx];
-
- spin_lock(&dq->lock);
- wr_q_index = dq->wr_point;
- dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
- list_add_tail(&slot->delivery, &dq->list);
- spin_unlock(&dq->lock);
- spin_lock(&sas_dev->lock);
- list_add_tail(&slot->entry, &sas_dev->list);
- spin_unlock(&sas_dev->lock);
-
- dlvry_queue = dq->id;
- dlvry_queue_slot = wr_q_index;
-
- slot->device_id = sas_dev->device_id;
- slot->n_elem = n_elem;
- slot->dlvry_queue = dlvry_queue;
- slot->dlvry_queue_slot = dlvry_queue_slot;
- cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
- slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
+ slot->n_elem = 0;
slot->task = task;
slot->port = port;
slot->is_internal = true;
- task->lldd_task = slot;
- memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
- memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
- memset(hisi_sas_status_buf_addr_mem(slot), 0,
- sizeof(struct hisi_sas_err_record));
-
- hisi_sas_task_prep_abort(hisi_hba, abort, slot, device_id);
-
- spin_lock_irqsave(&task->task_state_lock, flags);
- task->task_state_flags |= SAS_TASK_AT_INITIATOR;
- spin_unlock_irqrestore(&task->task_state_lock, flags);
- WRITE_ONCE(slot->ready, 1);
- /* send abort command to the chip */
- spin_lock(&dq->lock);
- hisi_hba->hw->start_delivery(dq);
- spin_unlock(&dq->lock);
+ hisi_sas_task_deliver(hisi_hba, slot, dq, sas_dev, abort, NULL);
return 0;
err_out:
- dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
+ dev_err(dev, "internal abort task prep: failed[%d]!\n", slot_idx);
- return rc;
+ return slot_idx;
}
/**
