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-rw-r--r--drivers/scsi/libsas/sas_internal.h3
-rw-r--r--drivers/scsi/libsas/sas_scsi_host.c105
2 files changed, 108 insertions, 0 deletions
diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h
index cd6aa723c3e1..b60f0bf612cf 100644
--- a/drivers/scsi/libsas/sas_internal.h
+++ b/drivers/scsi/libsas/sas_internal.h
@@ -97,6 +97,9 @@ extern const work_func_t sas_port_event_fns[PORT_NUM_EVENTS];
void sas_task_internal_done(struct sas_task *task);
void sas_task_internal_timedout(struct timer_list *t);
+int sas_execute_tmf(struct domain_device *device, void *parameter,
+ int para_len, int force_phy_id,
+ struct sas_tmf_task *tmf);
#ifdef CONFIG_SCSI_SAS_HOST_SMP
extern void sas_smp_host_handler(struct bsg_job *job, struct Scsi_Host *shost);
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index 40dcb4e8a747..d04002180be3 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -917,6 +917,111 @@ void sas_task_internal_timedout(struct timer_list *t)
complete(&task->slow_task->completion);
}
+#define TASK_TIMEOUT (20 * HZ)
+#define TASK_RETRY 3
+
+int sas_execute_tmf(struct domain_device *device, void *parameter,
+ int para_len, int force_phy_id,
+ struct sas_tmf_task *tmf)
+{
+ struct sas_task *task;
+ struct sas_internal *i =
+ to_sas_internal(device->port->ha->core.shost->transportt);
+ 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;
+
+ task->task_done = sas_task_internal_done;
+ task->tmf = tmf;
+
+ task->slow_task->timer.function = sas_task_internal_timedout;
+ task->slow_task->timer.expires = jiffies + TASK_TIMEOUT;
+ add_timer(&task->slow_task->timer);
+
+ res = i->dft->lldd_execute_task(task, GFP_KERNEL);
+ if (res) {
+ del_timer_sync(&task->slow_task->timer);
+ pr_err("executing TMF task failed %016llx (%d)\n",
+ SAS_ADDR(device->sas_addr), res);
+ break;
+ }
+
+ wait_for_completion(&task->slow_task->completion);
+
+ res = TMF_RESP_FUNC_FAILED;
+
+ if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
+ if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
+ pr_err("TMF task timeout for %016llx and not done\n",
+ SAS_ADDR(device->sas_addr));
+ break;
+ }
+ pr_warn("TMF task timeout for %016llx and done\n",
+ SAS_ADDR(device->sas_addr));
+ }
+
+ if (task->task_status.resp == SAS_TASK_COMPLETE &&
+ task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
+ res = TMF_RESP_FUNC_COMPLETE;
+ break;
+ }
+
+ if (task->task_status.resp == SAS_TASK_COMPLETE &&
+ task->task_status.stat == TMF_RESP_FUNC_SUCC) {
+ res = TMF_RESP_FUNC_SUCC;
+ 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
+ */
+ pr_warn("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) {
+ pr_warn("TMF task blocked task error %016llx\n",
+ SAS_ADDR(device->sas_addr));
+ res = -EMSGSIZE;
+ break;
+ }
+
+ if (task->task_status.resp == SAS_TASK_COMPLETE &&
+ task->task_status.stat == SAS_OPEN_REJECT) {
+ pr_warn("TMF task open reject failed %016llx\n",
+ SAS_ADDR(device->sas_addr));
+ res = -EIO;
+ } else {
+ pr_warn("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;
+ }
+
+ if (retry == TASK_RETRY)
+ pr_warn("executing TMF for %016llx failed after %d attempts!\n",
+ SAS_ADDR(device->sas_addr), TASK_RETRY);
+ sas_free_task(task);
+
+ return res;
+}
+
/*
* Tell an upper layer that it needs to initiate an abort for a given task.
* This should only ever be called by an LLDD.