summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c')
-rw-r--r--drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c114
1 files changed, 89 insertions, 25 deletions
diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
index 0f807798c624..d390325c99ec 100644
--- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
+++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
@@ -1170,6 +1170,7 @@ static struct ibmvscsis_cmd *ibmvscsis_get_free_cmd(struct scsi_info *vscsi)
cmd = list_first_entry_or_null(&vscsi->free_cmd,
struct ibmvscsis_cmd, list);
if (cmd) {
+ cmd->flags &= ~(DELAY_SEND);
list_del(&cmd->list);
cmd->iue = iue;
cmd->type = UNSET_TYPE;
@@ -1749,45 +1750,79 @@ static void srp_snd_msg_failed(struct scsi_info *vscsi, long rc)
static void ibmvscsis_send_messages(struct scsi_info *vscsi)
{
u64 msg_hi = 0;
- /* note do not attmempt to access the IU_data_ptr with this pointer
+ /* note do not attempt to access the IU_data_ptr with this pointer
* it is not valid
*/
struct viosrp_crq *crq = (struct viosrp_crq *)&msg_hi;
struct ibmvscsis_cmd *cmd, *nxt;
struct iu_entry *iue;
long rc = ADAPT_SUCCESS;
+ bool retry = false;
if (!(vscsi->flags & RESPONSE_Q_DOWN)) {
- list_for_each_entry_safe(cmd, nxt, &vscsi->waiting_rsp, list) {
- iue = cmd->iue;
+ do {
+ retry = false;
+ list_for_each_entry_safe(cmd, nxt, &vscsi->waiting_rsp,
+ list) {
+ /*
+ * Check to make sure abort cmd gets processed
+ * prior to the abort tmr cmd
+ */
+ if (cmd->flags & DELAY_SEND)
+ continue;
- crq->valid = VALID_CMD_RESP_EL;
- crq->format = cmd->rsp.format;
+ if (cmd->abort_cmd) {
+ retry = true;
+ cmd->abort_cmd->flags &= ~(DELAY_SEND);
+ }
- if (cmd->flags & CMD_FAST_FAIL)
- crq->status = VIOSRP_ADAPTER_FAIL;
+ /*
+ * If CMD_T_ABORTED w/o CMD_T_TAS scenarios and
+ * the case where LIO issued a
+ * ABORT_TASK: Sending TMR_TASK_DOES_NOT_EXIST
+ * case then we dont send a response, since it
+ * was already done.
+ */
+ if (cmd->se_cmd.transport_state & CMD_T_ABORTED &&
+ !(cmd->se_cmd.transport_state & CMD_T_TAS)) {
+ list_del(&cmd->list);
+ ibmvscsis_free_cmd_resources(vscsi,
+ cmd);
+ } else {
+ iue = cmd->iue;
- crq->IU_length = cpu_to_be16(cmd->rsp.len);
+ crq->valid = VALID_CMD_RESP_EL;
+ crq->format = cmd->rsp.format;
- rc = h_send_crq(vscsi->dma_dev->unit_address,
- be64_to_cpu(msg_hi),
- be64_to_cpu(cmd->rsp.tag));
+ if (cmd->flags & CMD_FAST_FAIL)
+ crq->status = VIOSRP_ADAPTER_FAIL;
- pr_debug("send_messages: cmd %p, tag 0x%llx, rc %ld\n",
- cmd, be64_to_cpu(cmd->rsp.tag), rc);
+ crq->IU_length = cpu_to_be16(cmd->rsp.len);
- /* if all ok free up the command element resources */
- if (rc == H_SUCCESS) {
- /* some movement has occurred */
- vscsi->rsp_q_timer.timer_pops = 0;
- list_del(&cmd->list);
+ rc = h_send_crq(vscsi->dma_dev->unit_address,
+ be64_to_cpu(msg_hi),
+ be64_to_cpu(cmd->rsp.tag));
- ibmvscsis_free_cmd_resources(vscsi, cmd);
- } else {
- srp_snd_msg_failed(vscsi, rc);
- break;
+ pr_debug("send_messages: cmd %p, tag 0x%llx, rc %ld\n",
+ cmd, be64_to_cpu(cmd->rsp.tag), rc);
+
+ /* if all ok free up the command
+ * element resources
+ */
+ if (rc == H_SUCCESS) {
+ /* some movement has occurred */
+ vscsi->rsp_q_timer.timer_pops = 0;
+ list_del(&cmd->list);
+
+ ibmvscsis_free_cmd_resources(vscsi,
+ cmd);
+ } else {
+ srp_snd_msg_failed(vscsi, rc);
+ break;
+ }
+ }
}
- }
+ } while (retry);
if (!rc) {
/*
@@ -2708,6 +2743,7 @@ static int ibmvscsis_alloc_cmds(struct scsi_info *vscsi, int num)
for (i = 0, cmd = (struct ibmvscsis_cmd *)vscsi->cmd_pool; i < num;
i++, cmd++) {
+ cmd->abort_cmd = NULL;
cmd->adapter = vscsi;
INIT_WORK(&cmd->work, ibmvscsis_scheduler);
list_add_tail(&cmd->list, &vscsi->free_cmd);
@@ -3579,9 +3615,20 @@ static int ibmvscsis_write_pending(struct se_cmd *se_cmd)
{
struct ibmvscsis_cmd *cmd = container_of(se_cmd, struct ibmvscsis_cmd,
se_cmd);
+ struct scsi_info *vscsi = cmd->adapter;
struct iu_entry *iue = cmd->iue;
int rc;
+ /*
+ * If CLIENT_FAILED OR RESPONSE_Q_DOWN, then just return success
+ * since LIO can't do anything about it, and we dont want to
+ * attempt an srp_transfer_data.
+ */
+ if ((vscsi->flags & (CLIENT_FAILED | RESPONSE_Q_DOWN))) {
+ pr_err("write_pending failed since: %d\n", vscsi->flags);
+ return 0;
+ }
+
rc = srp_transfer_data(cmd, &vio_iu(iue)->srp.cmd, ibmvscsis_rdma,
1, 1);
if (rc) {
@@ -3660,11 +3707,28 @@ static void ibmvscsis_queue_tm_rsp(struct se_cmd *se_cmd)
struct ibmvscsis_cmd *cmd = container_of(se_cmd, struct ibmvscsis_cmd,
se_cmd);
struct scsi_info *vscsi = cmd->adapter;
+ struct ibmvscsis_cmd *cmd_itr;
+ struct iu_entry *iue = iue = cmd->iue;
+ struct srp_tsk_mgmt *srp_tsk = &vio_iu(iue)->srp.tsk_mgmt;
+ u64 tag_to_abort = be64_to_cpu(srp_tsk->task_tag);
uint len;
pr_debug("queue_tm_rsp %p, status %d\n",
se_cmd, (int)se_cmd->se_tmr_req->response);
+ if (srp_tsk->tsk_mgmt_func == SRP_TSK_ABORT_TASK &&
+ cmd->se_cmd.se_tmr_req->response == TMR_TASK_DOES_NOT_EXIST) {
+ spin_lock_bh(&vscsi->intr_lock);
+ list_for_each_entry(cmd_itr, &vscsi->active_q, list) {
+ if (tag_to_abort == cmd_itr->se_cmd.tag) {
+ cmd_itr->abort_cmd = cmd;
+ cmd->flags |= DELAY_SEND;
+ break;
+ }
+ }
+ spin_unlock_bh(&vscsi->intr_lock);
+ }
+
srp_build_response(vscsi, cmd, &len);
cmd->rsp.format = SRP_FORMAT;
cmd->rsp.len = len;
@@ -3672,8 +3736,8 @@ static void ibmvscsis_queue_tm_rsp(struct se_cmd *se_cmd)
static void ibmvscsis_aborted_task(struct se_cmd *se_cmd)
{
- /* TBD: What (if anything) should we do here? */
- pr_debug("ibmvscsis_aborted_task %p\n", se_cmd);
+ pr_debug("ibmvscsis_aborted_task %p task_tag: %llu\n",
+ se_cmd, se_cmd->tag);
}
static struct se_wwn *ibmvscsis_make_tport(struct target_fabric_configfs *tf,
OpenPOWER on IntegriCloud