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Message-ID: <1447779059-136143-30-git-send-email-john.garry@huawei.com>
Date: Wed, 18 Nov 2015 00:50:56 +0800
From: John Garry <john.garry@...wei.com>
To: <JBottomley@...n.com>, <robh+dt@...nel.org>, <pawel.moll@....com>,
<mark.rutland@....com>, <ijc+devicetree@...lion.org.uk>,
<galak@...eaurora.org>, <arnd@...db.de>
CC: <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linuxarm@...wei.com>,
<john.garry2@...l.dcu.ie>, <hare@...e.de>, <xuwei5@...ilicon.com>,
<zhangfei.gao@...aro.org>, <john.garry@...wei.com>
Subject: [PATCH v5 29/32] scsi: hisi_sas: add tmf methods
Add function methods for tmf's.
Signed-off-by: John Garry <john.garry@...wei.com>
---
drivers/scsi/hisi_sas/hisi_sas_main.c | 309 ++++++++++++++++++++++++++++++++++
1 file changed, 309 insertions(+)
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 63ebaf3..4ee90eb 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -553,6 +553,309 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
}
+static void hisi_sas_task_done(struct sas_task *task)
+{
+ if (!del_timer(&task->slow_task->timer))
+ return;
+ complete(&task->slow_task->completion);
+}
+
+static void hisi_sas_tmf_timedout(unsigned long data)
+{
+ struct sas_task *task = (struct sas_task *)data;
+
+ task->task_state_flags |= SAS_TASK_STATE_ABORTED;
+ complete(&task->slow_task->completion);
+}
+
+#define TASK_TIMEOUT 20
+#define TASK_RETRY 3
+static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
+ void *parameter, u32 para_len,
+ struct hisi_sas_tmf_task *tmf)
+{
+ struct hisi_sas_device *sas_dev = device->lldd_dev;
+ struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
+ struct device *dev = &hisi_hba->pdev->dev;
+ struct sas_task *task;
+ int res, retry;
+
+ for (retry = 0; retry < TASK_RETRY; retry++) {
+ task = sas_alloc_slow_task(GFP_KERNEL);
+ if (!task)
+ return -ENOMEM;
+
+ task->dev = device;
+ task->task_proto = device->tproto;
+
+ memcpy(&task->ssp_task, parameter, para_len);
+ task->task_done = hisi_sas_task_done;
+
+ task->slow_task->timer.data = (unsigned long) task;
+ task->slow_task->timer.function = hisi_sas_tmf_timedout;
+ task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
+ add_timer(&task->slow_task->timer);
+
+ res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
+
+ if (res) {
+ del_timer(&task->slow_task->timer);
+ dev_err(dev, "abort tmf: executing internal task failed: %d\n",
+ res);
+ goto ex_err;
+ }
+
+ wait_for_completion(&task->slow_task->completion);
+ res = TMF_RESP_FUNC_FAILED;
+ /* Even TMF timed out, return direct. */
+ if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
+ if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
+ dev_err(dev, "abort tmf: TMF task[%d] timeout\n",
+ tmf->tag_of_task_to_be_managed);
+ if (task->lldd_task) {
+ struct hisi_sas_slot *slot =
+ task->lldd_task;
+
+ hisi_sas_slot_task_free(hisi_hba,
+ task, slot);
+ }
+
+ goto ex_err;
+ }
+ }
+
+ if (task->task_status.resp == SAS_TASK_COMPLETE &&
+ task->task_status.stat == SAM_STAT_GOOD) {
+ res = TMF_RESP_FUNC_COMPLETE;
+ break;
+ }
+
+ if (task->task_status.resp == SAS_TASK_COMPLETE &&
+ task->task_status.stat == SAS_DATA_UNDERRUN) {
+ /* no error, but return the number of bytes of
+ * underrun
+ */
+ dev_warn(dev, "abort tmf: task to dev %016llx "
+ "resp: 0x%x sts 0x%x underrun\n",
+ SAS_ADDR(device->sas_addr),
+ task->task_status.resp,
+ task->task_status.stat);
+ res = task->task_status.residual;
+ break;
+ }
+
+ if (task->task_status.resp == SAS_TASK_COMPLETE &&
+ task->task_status.stat == SAS_DATA_OVERRUN) {
+ dev_warn(dev, "abort tmf: blocked task error\n");
+ res = -EMSGSIZE;
+ break;
+ }
+
+ dev_warn(dev, "abort tmf: task to dev "
+ "%016llx resp: 0x%x status 0x%x\n",
+ SAS_ADDR(device->sas_addr), task->task_status.resp,
+ task->task_status.stat);
+ sas_free_task(task);
+ task = NULL;
+ }
+ex_err:
+ WARN_ON(retry == TASK_RETRY);
+ sas_free_task(task);
+ return res;
+}
+
+static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
+ u8 *lun, struct hisi_sas_tmf_task *tmf)
+{
+ struct sas_ssp_task ssp_task;
+
+ if (!(device->tproto & SAS_PROTOCOL_SSP))
+ return TMF_RESP_FUNC_ESUPP;
+
+ memcpy(ssp_task.LUN, lun, 8);
+
+ return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
+ sizeof(ssp_task), tmf);
+}
+
+static int hisi_sas_abort_task(struct sas_task *task)
+{
+ struct scsi_lun lun;
+ struct hisi_sas_tmf_task tmf_task;
+ struct domain_device *device = task->dev;
+ struct hisi_sas_device *sas_dev = device->lldd_dev;
+ struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
+ struct device *dev = &hisi_hba->pdev->dev;
+ int rc = TMF_RESP_FUNC_FAILED;
+ unsigned long flags;
+
+ if (!sas_dev) {
+ dev_warn(dev, "Device has been removed\n");
+ return TMF_RESP_FUNC_FAILED;
+ }
+
+ spin_lock_irqsave(&task->task_state_lock, flags);
+ if (task->task_state_flags & SAS_TASK_STATE_DONE) {
+ spin_unlock_irqrestore(&task->task_state_lock, flags);
+ rc = TMF_RESP_FUNC_COMPLETE;
+ goto out;
+ }
+
+ spin_unlock_irqrestore(&task->task_state_lock, flags);
+ sas_dev->dev_status = HISI_SAS_DEV_EH;
+ if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
+ struct scsi_cmnd *cmnd = task->uldd_task;
+ struct hisi_sas_slot *slot = task->lldd_task;
+ u32 tag = slot->idx;
+
+ int_to_scsilun(cmnd->device->lun, &lun);
+ tmf_task.tmf = TMF_ABORT_TASK;
+ tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
+
+ rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
+ &tmf_task);
+
+ /* if successful, clear the task and callback forwards.*/
+ if (rc == TMF_RESP_FUNC_COMPLETE) {
+ if (task->lldd_task) {
+ struct hisi_sas_slot *slot;
+
+ slot = &hisi_hba->slot_info
+ [tmf_task.tag_of_task_to_be_managed];
+ spin_lock_irqsave(&hisi_hba->lock, flags);
+ hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
+ spin_unlock_irqrestore(&hisi_hba->lock, flags);
+ }
+ }
+
+ } else if (task->task_proto & SAS_PROTOCOL_SATA ||
+ task->task_proto & SAS_PROTOCOL_STP) {
+ if (task->dev->dev_type == SAS_SATA_DEV) {
+ struct hisi_slot_info *slot = task->lldd_task;
+
+ dev_notice(dev, "abort task: hba=%p task=%p slot=%p\n",
+ hisi_hba, task, slot);
+ task->task_state_flags |= SAS_TASK_STATE_ABORTED;
+ rc = TMF_RESP_FUNC_COMPLETE;
+ goto out;
+ }
+
+ }
+
+out:
+ if (rc != TMF_RESP_FUNC_COMPLETE)
+ dev_notice(dev, "abort task: rc=%d\n", rc);
+ return rc;
+}
+
+static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
+{
+ struct hisi_sas_tmf_task tmf_task;
+ int rc = TMF_RESP_FUNC_FAILED;
+
+ tmf_task.tmf = TMF_ABORT_TASK_SET;
+ rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
+
+ return rc;
+}
+
+static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
+{
+ int rc = TMF_RESP_FUNC_FAILED;
+ struct hisi_sas_tmf_task tmf_task;
+
+ tmf_task.tmf = TMF_CLEAR_ACA;
+ rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
+
+ return rc;
+}
+
+static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
+{
+ struct sas_phy *phy = sas_get_local_phy(device);
+ int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
+ (device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
+ rc = sas_phy_reset(phy, reset_type);
+ sas_put_local_phy(phy);
+ msleep(2000);
+ return rc;
+}
+
+static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
+{
+ struct hisi_sas_device *sas_dev = device->lldd_dev;
+ struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+ unsigned long flags;
+ int rc = TMF_RESP_FUNC_FAILED;
+
+ if (sas_dev->dev_status != HISI_SAS_DEV_EH)
+ return TMF_RESP_FUNC_FAILED;
+ sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
+
+ rc = hisi_sas_debug_I_T_nexus_reset(device);
+
+ spin_lock_irqsave(&hisi_hba->lock, flags);
+ hisi_sas_release_task(hisi_hba, device);
+ spin_unlock_irqrestore(&hisi_hba->lock, flags);
+
+ return 0;
+}
+
+static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
+{
+ struct hisi_sas_tmf_task tmf_task;
+ struct hisi_sas_device *sas_dev = device->lldd_dev;
+ struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+ struct device *dev = &hisi_hba->pdev->dev;
+ unsigned long flags;
+ int rc = TMF_RESP_FUNC_FAILED;
+
+ tmf_task.tmf = TMF_LU_RESET;
+ sas_dev->dev_status = HISI_SAS_DEV_EH;
+ rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
+ if (rc == TMF_RESP_FUNC_COMPLETE) {
+ spin_lock_irqsave(&hisi_hba->lock, flags);
+ hisi_sas_release_task(hisi_hba, device);
+ spin_unlock_irqrestore(&hisi_hba->lock, flags);
+ }
+
+ /* If failed, fall-through I_T_Nexus reset */
+ dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n",
+ sas_dev->device_id, rc);
+ return rc;
+}
+
+static int hisi_sas_query_task(struct sas_task *task)
+{
+ struct scsi_lun lun;
+ struct hisi_sas_tmf_task tmf_task;
+ int rc = TMF_RESP_FUNC_FAILED;
+
+ if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
+ struct scsi_cmnd *cmnd = task->uldd_task;
+ struct domain_device *device = task->dev;
+ struct hisi_sas_slot *slot = task->lldd_task;
+ u32 tag = slot->idx;
+
+ int_to_scsilun(cmnd->device->lun, &lun);
+ tmf_task.tmf = TMF_QUERY_TASK;
+ tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
+
+ rc = hisi_sas_debug_issue_ssp_tmf(device,
+ lun.scsi_lun,
+ &tmf_task);
+ switch (rc) {
+ /* The task is still in Lun, release it then */
+ case TMF_RESP_FUNC_SUCC:
+ /* The task is not in Lun or failed, reset the phy */
+ case TMF_RESP_FUNC_FAILED:
+ case TMF_RESP_FUNC_COMPLETE:
+ break;
+ }
+ }
+ return rc;
+}
+
static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
{
hisi_sas_port_notify_formed(sas_phy);
@@ -629,6 +932,12 @@ static struct sas_domain_function_template hisi_sas_transport_ops = {
.lldd_dev_found = hisi_sas_dev_found,
.lldd_dev_gone = hisi_sas_dev_gone,
.lldd_execute_task = hisi_sas_queue_command,
+ .lldd_abort_task = hisi_sas_abort_task,
+ .lldd_abort_task_set = hisi_sas_abort_task_set,
+ .lldd_clear_aca = hisi_sas_clear_aca,
+ .lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
+ .lldd_lu_reset = hisi_sas_lu_reset,
+ .lldd_query_task = hisi_sas_query_task,
.lldd_port_formed = hisi_sas_port_formed,
.lldd_port_deformed = hisi_sas_port_deformed,
};
--
1.9.1
--
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