From 1eb42f965cedafb700e9c902ddafb1c51e3117f7 Mon Sep 17 00:00:00 2001 From: Quinn Tran Date: Thu, 19 Jan 2017 22:27:55 -0800 Subject: [PATCH] qla2xxx: Make trace flags more readable Trace flags are useful during debugging crash dumps using crash utility. These trace flags makes it easier to understand various states a command has successfully completed. Signed-off-by: Quinn Tran Signed-off-by: Himanshu Madhani Signed-off-by: Bart Van Assche Signed-off-by: Nicholas Bellinger --- drivers/scsi/qla2xxx/qla_target.c | 28 +++++++++---------- drivers/scsi/qla2xxx/qla_target.h | 55 +++++++++++++++++--------------------- drivers/scsi/qla2xxx/tcm_qla2xxx.c | 43 ++++++++++++++--------------- 3 files changed, 59 insertions(+), 67 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index fcdd5c9..5f31ae9 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -3297,7 +3297,7 @@ int qlt_abort_cmd(struct qla_tgt_cmd *cmd) return EIO; } cmd->aborted = 1; - cmd->cmd_flags |= BIT_6; + cmd->trc_flags |= TRC_ABORT; spin_unlock_irqrestore(&cmd->cmd_lock, flags); qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1); @@ -3345,7 +3345,7 @@ static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha, struct qla_tgt_srr_imm *imm; tgt->ctio_srr_id++; - cmd->cmd_flags |= BIT_15; + cmd->trc_flags |= TRC_SRR_CTIO; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx); @@ -3528,7 +3528,7 @@ qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) dump_stack(); } - cmd->cmd_flags |= BIT_17; + cmd->trc_flags |= TRC_FLUSH; ha->tgt.tgt_ops->free_cmd(cmd); } @@ -3694,7 +3694,7 @@ static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, */ if ((cmd->state != QLA_TGT_STATE_NEED_DATA) && (!cmd->aborted)) { - cmd->cmd_flags |= BIT_13; + cmd->trc_flags |= TRC_CTIO_ERR; if (qlt_term_ctio_exchange(vha, ctio, cmd, status)) return; } @@ -3702,7 +3702,7 @@ static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, skip_term: if (cmd->state == QLA_TGT_STATE_PROCESSED) { - cmd->cmd_flags |= BIT_12; + cmd->trc_flags |= TRC_CTIO_DONE; } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { cmd->state = QLA_TGT_STATE_DATA_IN; @@ -3712,11 +3712,11 @@ skip_term: ha->tgt.tgt_ops->handle_data(cmd); return; } else if (cmd->aborted) { - cmd->cmd_flags |= BIT_18; + cmd->trc_flags |= TRC_CTIO_ABORTED; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag); } else { - cmd->cmd_flags |= BIT_19; + cmd->trc_flags |= TRC_CTIO_STRANGE; ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c, "qla_target(%d): A command in state (%d) should " "not return a CTIO complete\n", vha->vp_idx, cmd->state); @@ -3781,7 +3781,7 @@ static void __qlt_do_work(struct qla_tgt_cmd *cmd) int ret, fcp_task_attr, data_dir, bidi = 0; cmd->cmd_in_wq = 0; - cmd->cmd_flags |= BIT_1; + cmd->trc_flags |= TRC_DO_WORK; if (tgt->tgt_stop) goto out_term; @@ -3833,7 +3833,7 @@ out_term: * cmd has not sent to target yet, so pass NULL as the second * argument to qlt_send_term_exchange() and free the memory here. */ - cmd->cmd_flags |= BIT_2; + cmd->trc_flags |= TRC_DO_WORK_ERR; spin_lock_irqsave(&ha->hardware_lock, flags); qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0); @@ -3884,7 +3884,7 @@ static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha, cmd->loop_id = sess->loop_id; cmd->conf_compl_supported = sess->conf_compl_supported; - cmd->cmd_flags = 0; + cmd->trc_flags = 0; cmd->jiffies_at_alloc = get_jiffies_64(); cmd->reset_count = vha->hw->chip_reset; @@ -4020,7 +4020,7 @@ static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, } cmd->cmd_in_wq = 1; - cmd->cmd_flags |= BIT_0; + cmd->trc_flags |= TRC_NEW_CMD; cmd->se_cmd.cpuid = ha->msix_count ? ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND; @@ -4712,7 +4712,7 @@ static void qlt_handle_srr(struct scsi_qla_host *vha, 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); spin_unlock_irqrestore(&ha->hardware_lock, flags); if (xmit_type & QLA_TGT_XMIT_DATA) { - cmd->cmd_flags |= BIT_8; + cmd->trc_flags |= TRC_SRR_XRDY; qlt_rdy_to_xfer(cmd); } } else { @@ -4731,7 +4731,7 @@ static void qlt_handle_srr(struct scsi_qla_host *vha, /* Transmit response in case of status and data-in cases */ if (resp) { - cmd->cmd_flags |= BIT_7; + cmd->trc_flags |= TRC_SRR_RSP; qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); } @@ -4747,7 +4747,7 @@ out_reject: cmd->state = QLA_TGT_STATE_DATA_IN; dump_stack(); } else { - cmd->cmd_flags |= BIT_9; + cmd->trc_flags |= TRC_SRR_TERM; qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0); } spin_unlock_irqrestore(&ha->hardware_lock, flags); diff --git a/drivers/scsi/qla2xxx/qla_target.h b/drivers/scsi/qla2xxx/qla_target.h index 14f2e24..5d00529 100644 --- a/drivers/scsi/qla2xxx/qla_target.h +++ b/drivers/scsi/qla2xxx/qla_target.h @@ -965,35 +965,28 @@ struct qla_tgt_sess { qlt_plogi_ack_t *plogi_link[QLT_PLOGI_LINK_MAX]; }; -typedef enum { - /* - * BIT_0 - Atio Arrival / schedule to work - * BIT_1 - qlt_do_work - * BIT_2 - qlt_do work failed - * BIT_3 - xfer rdy/tcm_qla2xxx_write_pending - * BIT_4 - read respond/tcm_qla2xx_queue_data_in - * BIT_5 - status respond / tcm_qla2xx_queue_status - * BIT_6 - tcm request to abort/Term exchange. - * pre_xmit_response->qlt_send_term_exchange - * BIT_7 - SRR received (qlt_handle_srr->qlt_xmit_response) - * BIT_8 - SRR received (qlt_handle_srr->qlt_rdy_to_xfer) - * BIT_9 - SRR received (qla_handle_srr->qlt_send_term_exchange) - * BIT_10 - Data in - hanlde_data->tcm_qla2xxx_handle_data - - * BIT_12 - good completion - qlt_ctio_do_completion -->free_cmd - * BIT_13 - Bad completion - - * qlt_ctio_do_completion --> qlt_term_ctio_exchange - * BIT_14 - Back end data received/sent. - * BIT_15 - SRR prepare ctio - * BIT_16 - complete free - * BIT_17 - flush - qlt_abort_cmd_on_host_reset - * BIT_18 - completion w/abort status - * BIT_19 - completion w/unknown status - * BIT_20 - tcm_qla2xxx_free_cmd - */ - CMD_FLAG_DATA_WORK = BIT_11, - CMD_FLAG_DATA_WORK_FREE = BIT_21, -} cmd_flags_t; +enum trace_flags { + TRC_NEW_CMD = BIT_0, + TRC_DO_WORK = BIT_1, + TRC_DO_WORK_ERR = BIT_2, + TRC_XFR_RDY = BIT_3, + TRC_XMIT_DATA = BIT_4, + TRC_XMIT_STATUS = BIT_5, + TRC_SRR_RSP = BIT_6, + TRC_SRR_XRDY = BIT_7, + TRC_SRR_TERM = BIT_8, + TRC_SRR_CTIO = BIT_9, + TRC_FLUSH = BIT_10, + TRC_CTIO_ERR = BIT_11, + TRC_CTIO_DONE = BIT_12, + TRC_CTIO_ABORTED = BIT_13, + TRC_CTIO_STRANGE= BIT_14, + TRC_CMD_DONE = BIT_15, + TRC_CMD_CHK_STOP = BIT_16, + TRC_CMD_FREE = BIT_17, + TRC_DATA_IN = BIT_18, + TRC_ABORT = BIT_19, +}; struct qla_tgt_cmd { struct se_cmd se_cmd; @@ -1016,6 +1009,8 @@ struct qla_tgt_cmd { unsigned int cmd_sent_to_fw:1; unsigned int cmd_in_wq:1; unsigned int aborted:1; + unsigned int data_work:1; + unsigned int data_work_free:1; struct scatterlist *sg; /* cmd data buffer SG vector */ int sg_cnt; /* SG segments count */ @@ -1040,7 +1035,7 @@ struct qla_tgt_cmd { uint64_t jiffies_at_alloc; uint64_t jiffies_at_free; - cmd_flags_t cmd_flags; + enum trace_flags trc_flags; }; struct qla_tgt_sess_work_param { diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c index 1bec6ab..af4a198 100644 --- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c +++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c @@ -282,10 +282,10 @@ static void tcm_qla2xxx_complete_free(struct work_struct *work) cmd->cmd_in_wq = 0; - WARN_ON(cmd->cmd_flags & BIT_16); + WARN_ON(cmd->trc_flags & TRC_CMD_FREE); cmd->vha->tgt_counters.qla_core_ret_sta_ctio++; - cmd->cmd_flags |= BIT_16; + cmd->trc_flags |= TRC_CMD_FREE; transport_generic_free_cmd(&cmd->se_cmd, 0); } @@ -299,8 +299,8 @@ static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd) cmd->vha->tgt_counters.core_qla_free_cmd++; cmd->cmd_in_wq = 1; - BUG_ON(cmd->cmd_flags & BIT_20); - cmd->cmd_flags |= BIT_20; + WARN_ON(cmd->trc_flags & TRC_CMD_DONE); + cmd->trc_flags |= TRC_CMD_DONE; INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free); queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work); @@ -315,7 +315,7 @@ static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd) if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) { cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd); - cmd->cmd_flags |= BIT_14; + cmd->trc_flags |= TRC_CMD_CHK_STOP; } return target_put_sess_cmd(se_cmd); @@ -377,7 +377,7 @@ static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd) cmd->se_cmd.se_cmd_flags); return 0; } - cmd->cmd_flags |= BIT_3; + cmd->trc_flags |= TRC_XFR_RDY; cmd->bufflen = se_cmd->data_length; cmd->dma_data_direction = target_reverse_dma_direction(se_cmd); @@ -493,9 +493,9 @@ static void tcm_qla2xxx_handle_data_work(struct work_struct *work) cmd->cmd_in_wq = 0; spin_lock_irqsave(&cmd->cmd_lock, flags); - cmd->cmd_flags |= CMD_FLAG_DATA_WORK; + cmd->data_work = 1; if (cmd->aborted) { - cmd->cmd_flags |= CMD_FLAG_DATA_WORK_FREE; + cmd->data_work_free = 1; spin_unlock_irqrestore(&cmd->cmd_lock, flags); tcm_qla2xxx_free_cmd(cmd); @@ -532,7 +532,7 @@ static void tcm_qla2xxx_handle_data_work(struct work_struct *work) */ static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd) { - cmd->cmd_flags |= BIT_10; + cmd->trc_flags |= TRC_DATA_IN; cmd->cmd_in_wq = 1; INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work); queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work); @@ -627,7 +627,7 @@ static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd) return 0; } - cmd->cmd_flags |= BIT_4; + cmd->trc_flags |= TRC_XMIT_DATA; cmd->bufflen = se_cmd->data_length; cmd->dma_data_direction = target_reverse_dma_direction(se_cmd); @@ -658,11 +658,11 @@ static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd) cmd->sg_cnt = 0; cmd->offset = 0; cmd->dma_data_direction = target_reverse_dma_direction(se_cmd); - if (cmd->cmd_flags & BIT_5) { - pr_crit("Bit_5 already set for cmd = %p.\n", cmd); + if (cmd->trc_flags & TRC_XMIT_STATUS) { + pr_crit("Multiple calls for status = %p.\n", cmd); dump_stack(); } - cmd->cmd_flags |= BIT_5; + cmd->trc_flags |= TRC_XMIT_STATUS; if (se_cmd->data_direction == DMA_FROM_DEVICE) { /* @@ -718,10 +718,7 @@ static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd) qlt_xmit_tm_rsp(mcmd); } - -#define DATA_WORK_NOT_FREE(_flags) \ - (( _flags & (CMD_FLAG_DATA_WORK|CMD_FLAG_DATA_WORK_FREE)) == \ - CMD_FLAG_DATA_WORK) +#define DATA_WORK_NOT_FREE(_cmd) (_cmd->data_work && !_cmd->data_work_free) static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd) { struct qla_tgt_cmd *cmd = container_of(se_cmd, @@ -733,13 +730,13 @@ static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd) spin_lock_irqsave(&cmd->cmd_lock, flags); if ((cmd->state == QLA_TGT_STATE_NEW)|| - ((cmd->state == QLA_TGT_STATE_DATA_IN) && - DATA_WORK_NOT_FREE(cmd->cmd_flags)) ) { - - cmd->cmd_flags |= CMD_FLAG_DATA_WORK_FREE; + ((cmd->state == QLA_TGT_STATE_DATA_IN) && + DATA_WORK_NOT_FREE(cmd))) { + cmd->data_work_free = 1; spin_unlock_irqrestore(&cmd->cmd_lock, flags); - /* Cmd have not reached firmware. - * Use this trigger to free it. */ + /* + * cmd has not reached fw, Use this trigger to free it. + */ tcm_qla2xxx_free_cmd(cmd); return; } -- 2.7.4