diff options
Diffstat (limited to 'drivers/target/loopback')
| -rw-r--r-- | drivers/target/loopback/tcm_loop.c | 71 | ||||
| -rw-r--r-- | drivers/target/loopback/tcm_loop.h | 2 |
2 files changed, 69 insertions, 4 deletions
diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c index 783675f7cdab..04811caac487 100644 --- a/drivers/target/loopback/tcm_loop.c +++ b/drivers/target/loopback/tcm_loop.c @@ -135,6 +135,21 @@ static int tcm_loop_change_queue_depth( return sdev->queue_depth; } +static int tcm_loop_change_queue_type(struct scsi_device *sdev, int tag) +{ + if (sdev->tagged_supported) { + scsi_set_tag_type(sdev, tag); + + if (tag) + scsi_activate_tcq(sdev, sdev->queue_depth); + else + scsi_deactivate_tcq(sdev, sdev->queue_depth); + } else + tag = 0; + + return tag; +} + /* * Locate the SAM Task Attr from struct scsi_cmnd * */ @@ -236,6 +251,7 @@ static int tcm_loop_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *sc) } tl_cmd->sc = sc; + tl_cmd->sc_cmd_tag = sc->tag; INIT_WORK(&tl_cmd->work, tcm_loop_submission_work); queue_work(tcm_loop_workqueue, &tl_cmd->work); return 0; @@ -247,7 +263,7 @@ static int tcm_loop_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *sc) */ static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg, struct tcm_loop_nexus *tl_nexus, - int lun, enum tcm_tmreq_table tmr) + int lun, int task, enum tcm_tmreq_table tmr) { struct se_cmd *se_cmd = NULL; struct se_session *se_sess; @@ -283,6 +299,9 @@ static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg, if (rc < 0) goto release; + if (tmr == TMR_ABORT_TASK) + se_cmd->se_tmr_req->ref_task_tag = task; + /* * Locate the underlying TCM struct se_lun */ @@ -310,6 +329,36 @@ release: return ret; } +static int tcm_loop_abort_task(struct scsi_cmnd *sc) +{ + struct tcm_loop_hba *tl_hba; + struct tcm_loop_nexus *tl_nexus; + struct tcm_loop_tpg *tl_tpg; + int ret = FAILED; + + /* + * Locate the tcm_loop_hba_t pointer + */ + tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host); + /* + * Locate the tl_nexus and se_sess pointers + */ + tl_nexus = tl_hba->tl_nexus; + if (!tl_nexus) { + pr_err("Unable to perform device reset without" + " active I_T Nexus\n"); + return FAILED; + } + + /* + * Locate the tl_tpg pointer from TargetID in sc->device->id + */ + tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; + ret = tcm_loop_issue_tmr(tl_tpg, tl_nexus, sc->device->lun, + sc->tag, TMR_ABORT_TASK); + return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; +} + /* * Called from SCSI EH process context to issue a LUN_RESET TMR * to struct scsi_device @@ -338,8 +387,8 @@ static int tcm_loop_device_reset(struct scsi_cmnd *sc) * Locate the tl_tpg pointer from TargetID in sc->device->id */ tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id]; - ret = tcm_loop_issue_tmr(tl_tpg, tl_nexus, - sc->device->lun, TMR_LUN_RESET); + ret = tcm_loop_issue_tmr(tl_tpg, tl_nexus, sc->device->lun, + 0, TMR_LUN_RESET); return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; } @@ -351,6 +400,15 @@ static int tcm_loop_slave_alloc(struct scsi_device *sd) static int tcm_loop_slave_configure(struct scsi_device *sd) { + if (sd->tagged_supported) { + scsi_activate_tcq(sd, sd->queue_depth); + scsi_adjust_queue_depth(sd, MSG_SIMPLE_TAG, + sd->host->cmd_per_lun); + } else { + scsi_adjust_queue_depth(sd, 0, + sd->host->cmd_per_lun); + } + return 0; } @@ -360,6 +418,8 @@ static struct scsi_host_template tcm_loop_driver_template = { .name = "TCM_Loopback", .queuecommand = tcm_loop_queuecommand, .change_queue_depth = tcm_loop_change_queue_depth, + .change_queue_type = tcm_loop_change_queue_type, + .eh_abort_handler = tcm_loop_abort_task, .eh_device_reset_handler = tcm_loop_device_reset, .can_queue = 1024, .this_id = -1, @@ -719,7 +779,10 @@ static void tcm_loop_set_default_node_attributes(struct se_node_acl *se_acl) static u32 tcm_loop_get_task_tag(struct se_cmd *se_cmd) { - return 1; + struct tcm_loop_cmd *tl_cmd = container_of(se_cmd, + struct tcm_loop_cmd, tl_se_cmd); + + return tl_cmd->sc_cmd_tag; } static int tcm_loop_get_cmd_state(struct se_cmd *se_cmd) diff --git a/drivers/target/loopback/tcm_loop.h b/drivers/target/loopback/tcm_loop.h index 56528f7dafae..54c59d0b6608 100644 --- a/drivers/target/loopback/tcm_loop.h +++ b/drivers/target/loopback/tcm_loop.h @@ -10,6 +10,8 @@ struct tcm_loop_cmd { /* State of Linux/SCSI CDB+Data descriptor */ u32 sc_cmd_state; + /* Tagged command queueing */ + u32 sc_cmd_tag; /* Pointer to the CDB+Data descriptor from Linux/SCSI subsystem */ struct scsi_cmnd *sc; /* The TCM I/O descriptor that is accessed via container_of() */ |