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Date: Mon, 17 Oct 2022 11:01:17 +0200
From: Jinpu Wang <jinpu.wang@...os.com>
To: John Garry <john.garry@...wei.com>
Cc: jejb@...ux.ibm.com, martin.petersen@...cle.com,
jinpu.wang@...os.com, damien.lemoal@...nsource.wdc.com,
linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
linuxarm@...wei.com, yangxingui@...wei.com, niklas.cassel@....com
Subject: Re: [PATCH v6 6/8] scsi: pm8001: Use sas_ata_device_link_abort() to
handle NCQ errors
On Mon, Oct 17, 2022 at 10:50 AM John Garry <john.garry@...wei.com> wrote:
>
> In commit c6b9ef5779c3 ("[SCSI] pm80xx: NCQ error handling changes") the
> driver had support added to handle NCQ errors but much of what is done
> in this handling is duplicated from the libata EH.
>
> In that named commit we handle in 2x main steps:
> a. Issue read log ext10 to examine and clear the errors
> b. Issue SATA_ABORT all command
>
> Indeed, in libata EH, we do similar to above:
> a. ata_do_eh() -> ata_eh_autopsy() -> ata_eh_link_autopsy() ->
> ata_eh_analyze_ncq_error() -> ata_eh_read_log_10h()
> b. ata_do_eh() -> ata_eh_recover() which will issue a device soft reset
> or hard reset
>
> Since there is so much duplication, use sas_ata_device_link_abort() which
> will abort all pending IOs and kick of ATA EH which will do the steps,
> above.
>
> However we will not follow the advisory to send the SATA_ABORT all command
> after the autopsy in read log ext10. Indeed, in libsas EH, we already send
> a per-task SATA_ABORT command, and this is prior to the ATA EH kicking in
> and issuing the read log ext10 in the recovery process. I judge that this
> is ok as the SATA_ABORT command does not actually send any protocol on the
> link to abort IO on the other side, so would not change any state on the
> disk (for the read log ext10 command).
>
> Signed-off-by: John Garry <john.garry@...wei.com>
> Tested-by: Damien Le Moal <damien.lemoal@...nsource.wdc.com>
> Tested-by: Niklas Cassel <niklas.cassel@....com> # pm80xx
Reuse ata helper is nice.
Acked-by: Jack Wang <jinpu.wang@...os.com>
> ---
> drivers/scsi/pm8001/pm8001_hwi.c | 171 +++----------------------------
> drivers/scsi/pm8001/pm8001_sas.c | 6 --
> drivers/scsi/pm8001/pm8001_sas.h | 5 -
> drivers/scsi/pm8001/pm80xx_hwi.c | 163 ++---------------------------
> 4 files changed, 19 insertions(+), 326 deletions(-)
>
> diff --git a/drivers/scsi/pm8001/pm8001_hwi.c b/drivers/scsi/pm8001/pm8001_hwi.c
> index c0adc3a9d196..ec1a9ab61814 100644
> --- a/drivers/scsi/pm8001/pm8001_hwi.c
> +++ b/drivers/scsi/pm8001/pm8001_hwi.c
> @@ -1724,7 +1724,14 @@ void pm8001_work_fn(struct work_struct *work)
> pm8001_free_dev(pm8001_dev);
> }
> }
> - } break;
> + }
> + break;
> + case IO_XFER_ERROR_ABORTED_NCQ_MODE:
> + {
> + dev = pm8001_dev->sas_device;
> + sas_ata_device_link_abort(dev, false);
> + }
> + break;
> }
> kfree(pw);
> }
> @@ -1748,110 +1755,6 @@ int pm8001_handle_event(struct pm8001_hba_info *pm8001_ha, void *data,
> return ret;
> }
>
> -static void pm8001_send_abort_all(struct pm8001_hba_info *pm8001_ha,
> - struct pm8001_device *pm8001_ha_dev)
> -{
> - struct pm8001_ccb_info *ccb;
> - struct sas_task *task;
> - struct task_abort_req task_abort;
> - u32 opc = OPC_INB_SATA_ABORT;
> - int ret;
> -
> - pm8001_ha_dev->id |= NCQ_ABORT_ALL_FLAG;
> - pm8001_ha_dev->id &= ~NCQ_READ_LOG_FLAG;
> -
> - task = sas_alloc_slow_task(GFP_ATOMIC);
> - if (!task) {
> - pm8001_dbg(pm8001_ha, FAIL, "cannot allocate task\n");
> - return;
> - }
> -
> - task->task_done = pm8001_task_done;
> -
> - ccb = pm8001_ccb_alloc(pm8001_ha, pm8001_ha_dev, task);
> - if (!ccb) {
> - sas_free_task(task);
> - return;
> - }
> -
> - memset(&task_abort, 0, sizeof(task_abort));
> - task_abort.abort_all = cpu_to_le32(1);
> - task_abort.device_id = cpu_to_le32(pm8001_ha_dev->device_id);
> - task_abort.tag = cpu_to_le32(ccb->ccb_tag);
> -
> - ret = pm8001_mpi_build_cmd(pm8001_ha, 0, opc, &task_abort,
> - sizeof(task_abort), 0);
> - if (ret) {
> - sas_free_task(task);
> - pm8001_ccb_free(pm8001_ha, ccb);
> - }
> -}
> -
> -static void pm8001_send_read_log(struct pm8001_hba_info *pm8001_ha,
> - struct pm8001_device *pm8001_ha_dev)
> -{
> - struct sata_start_req sata_cmd;
> - int res;
> - struct pm8001_ccb_info *ccb;
> - struct sas_task *task = NULL;
> - struct host_to_dev_fis fis;
> - struct domain_device *dev;
> - u32 opc = OPC_INB_SATA_HOST_OPSTART;
> -
> - task = sas_alloc_slow_task(GFP_ATOMIC);
> - if (!task) {
> - pm8001_dbg(pm8001_ha, FAIL, "cannot allocate task !!!\n");
> - return;
> - }
> - task->task_done = pm8001_task_done;
> -
> - /*
> - * Allocate domain device by ourselves as libsas is not going to
> - * provide any.
> - */
> - dev = kzalloc(sizeof(struct domain_device), GFP_ATOMIC);
> - if (!dev) {
> - sas_free_task(task);
> - pm8001_dbg(pm8001_ha, FAIL,
> - "Domain device cannot be allocated\n");
> - return;
> - }
> - task->dev = dev;
> - task->dev->lldd_dev = pm8001_ha_dev;
> -
> - ccb = pm8001_ccb_alloc(pm8001_ha, pm8001_ha_dev, task);
> - if (!ccb) {
> - sas_free_task(task);
> - kfree(dev);
> - return;
> - }
> -
> - pm8001_ha_dev->id |= NCQ_READ_LOG_FLAG;
> - pm8001_ha_dev->id |= NCQ_2ND_RLE_FLAG;
> -
> - /* construct read log FIS */
> - memset(&fis, 0, sizeof(struct host_to_dev_fis));
> - fis.fis_type = 0x27;
> - fis.flags = 0x80;
> - fis.command = ATA_CMD_READ_LOG_EXT;
> - fis.lbal = 0x10;
> - fis.sector_count = 0x1;
> -
> - memset(&sata_cmd, 0, sizeof(sata_cmd));
> - sata_cmd.tag = cpu_to_le32(ccb->ccb_tag);
> - sata_cmd.device_id = cpu_to_le32(pm8001_ha_dev->device_id);
> - sata_cmd.ncqtag_atap_dir_m = cpu_to_le32((0x1 << 7) | (0x5 << 9));
> - memcpy(&sata_cmd.sata_fis, &fis, sizeof(struct host_to_dev_fis));
> -
> - res = pm8001_mpi_build_cmd(pm8001_ha, 0, opc, &sata_cmd,
> - sizeof(sata_cmd), 0);
> - if (res) {
> - sas_free_task(task);
> - pm8001_ccb_free(pm8001_ha, ccb);
> - kfree(dev);
> - }
> -}
> -
> /**
> * mpi_ssp_completion- process the event that FW response to the SSP request.
> * @pm8001_ha: our hba card information
> @@ -2301,8 +2204,7 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
> return;
> }
>
> - if ((pm8001_dev && !(pm8001_dev->id & NCQ_READ_LOG_FLAG))
> - && unlikely(!t || !t->lldd_task || !t->dev)) {
> + if (pm8001_dev && unlikely(!t || !t->lldd_task || !t->dev)) {
> pm8001_dbg(pm8001_ha, FAIL, "task or dev null\n");
> return;
> }
> @@ -2360,15 +2262,6 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
> if (param == 0) {
> ts->resp = SAS_TASK_COMPLETE;
> ts->stat = SAS_SAM_STAT_GOOD;
> - /* check if response is for SEND READ LOG */
> - if (pm8001_dev &&
> - (pm8001_dev->id & NCQ_READ_LOG_FLAG)) {
> - pm8001_send_abort_all(pm8001_ha, pm8001_dev);
> - /* Free the tag */
> - pm8001_tag_free(pm8001_ha, tag);
> - sas_free_task(t);
> - return;
> - }
> } else {
> u8 len;
> ts->resp = SAS_TASK_COMPLETE;
> @@ -2666,9 +2559,10 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha, void *piomb)
> if (event == IO_XFER_ERROR_ABORTED_NCQ_MODE) {
> /* find device using device id */
> pm8001_dev = pm8001_find_dev(pm8001_ha, dev_id);
> - /* send read log extension */
> if (pm8001_dev)
> - pm8001_send_read_log(pm8001_ha, pm8001_dev);
> + pm8001_handle_event(pm8001_ha,
> + pm8001_dev,
> + IO_XFER_ERROR_ABORTED_NCQ_MODE);
> return;
> }
>
> @@ -3649,12 +3543,7 @@ int pm8001_mpi_task_abort_resp(struct pm8001_hba_info *pm8001_ha, void *piomb)
> pm8001_ccb_task_free(pm8001_ha, ccb);
> mb();
>
> - if (pm8001_dev->id & NCQ_ABORT_ALL_FLAG) {
> - sas_free_task(t);
> - pm8001_dev->id &= ~NCQ_ABORT_ALL_FLAG;
> - } else {
> - t->task_done(t);
> - }
> + t->task_done(t);
>
> return 0;
> }
> @@ -4206,7 +4095,6 @@ static int pm8001_chip_sata_req(struct pm8001_hba_info *pm8001_ha,
> u64 phys_addr;
> u32 ATAP = 0x0;
> u32 dir;
> - unsigned long flags;
> u32 opc = OPC_INB_SATA_HOST_OPSTART;
>
> memset(&sata_cmd, 0, sizeof(sata_cmd));
> @@ -4261,39 +4149,6 @@ static int pm8001_chip_sata_req(struct pm8001_hba_info *pm8001_ha,
> sata_cmd.esgl = 0;
> }
>
> - /* Check for read log for failed drive and return */
> - if (sata_cmd.sata_fis.command == 0x2f) {
> - if (((pm8001_ha_dev->id & NCQ_READ_LOG_FLAG) ||
> - (pm8001_ha_dev->id & NCQ_ABORT_ALL_FLAG) ||
> - (pm8001_ha_dev->id & NCQ_2ND_RLE_FLAG))) {
> - struct task_status_struct *ts;
> -
> - pm8001_ha_dev->id &= 0xDFFFFFFF;
> - ts = &task->task_status;
> -
> - spin_lock_irqsave(&task->task_state_lock, flags);
> - ts->resp = SAS_TASK_COMPLETE;
> - ts->stat = SAS_SAM_STAT_GOOD;
> - task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
> - task->task_state_flags |= SAS_TASK_STATE_DONE;
> - if (unlikely((task->task_state_flags &
> - SAS_TASK_STATE_ABORTED))) {
> - spin_unlock_irqrestore(&task->task_state_lock,
> - flags);
> - pm8001_dbg(pm8001_ha, FAIL,
> - "task 0x%p resp 0x%x stat 0x%x but aborted by upper layer\n",
> - task, ts->resp,
> - ts->stat);
> - pm8001_ccb_task_free(pm8001_ha, ccb);
> - } else {
> - spin_unlock_irqrestore(&task->task_state_lock,
> - flags);
> - pm8001_ccb_task_free_done(pm8001_ha, ccb);
> - return 0;
> - }
> - }
> - }
> -
> return pm8001_mpi_build_cmd(pm8001_ha, 0, opc, &sata_cmd,
> sizeof(sata_cmd), 0);
> }
> diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
> index d5ec29f69be3..2d84ae95a1f9 100644
> --- a/drivers/scsi/pm8001/pm8001_sas.c
> +++ b/drivers/scsi/pm8001/pm8001_sas.c
> @@ -687,12 +687,6 @@ int pm8001_dev_found(struct domain_device *dev)
> return pm8001_dev_found_notify(dev);
> }
>
> -void pm8001_task_done(struct sas_task *task)
> -{
> - del_timer(&task->slow_task->timer);
> - complete(&task->slow_task->completion);
> -}
> -
> #define PM8001_TASK_TIMEOUT 20
>
> /**
> diff --git a/drivers/scsi/pm8001/pm8001_sas.h b/drivers/scsi/pm8001/pm8001_sas.h
> index b08f52673889..16a753d5e8a7 100644
> --- a/drivers/scsi/pm8001/pm8001_sas.h
> +++ b/drivers/scsi/pm8001/pm8001_sas.h
> @@ -579,10 +579,6 @@ struct pm8001_fw_image_header {
> #define FLASH_UPDATE_DNLD_NOT_SUPPORTED 0x10
> #define FLASH_UPDATE_DISABLED 0x11
>
> -#define NCQ_READ_LOG_FLAG 0x80000000
> -#define NCQ_ABORT_ALL_FLAG 0x40000000
> -#define NCQ_2ND_RLE_FLAG 0x20000000
> -
> /* Device states */
> #define DS_OPERATIONAL 0x01
> #define DS_PORT_IN_RESET 0x02
> @@ -709,7 +705,6 @@ int pm8001_mpi_fw_flash_update_resp(struct pm8001_hba_info *pm8001_ha,
> int pm8001_mpi_general_event(struct pm8001_hba_info *pm8001_ha, void *piomb);
> int pm8001_mpi_task_abort_resp(struct pm8001_hba_info *pm8001_ha, void *piomb);
> struct sas_task *pm8001_alloc_task(void);
> -void pm8001_task_done(struct sas_task *task);
> void pm8001_free_task(struct sas_task *task);
> void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag);
> struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
> diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
> index dd0e06983cd3..4484c498bcb6 100644
> --- a/drivers/scsi/pm8001/pm80xx_hwi.c
> +++ b/drivers/scsi/pm8001/pm80xx_hwi.c
> @@ -1778,113 +1778,6 @@ pm80xx_chip_interrupt_disable(struct pm8001_hba_info *pm8001_ha, u8 vec)
> pm80xx_chip_intx_interrupt_disable(pm8001_ha);
> }
>
> -static void pm80xx_send_abort_all(struct pm8001_hba_info *pm8001_ha,
> - struct pm8001_device *pm8001_ha_dev)
> -{
> - struct pm8001_ccb_info *ccb;
> - struct sas_task *task;
> - struct task_abort_req task_abort;
> - u32 opc = OPC_INB_SATA_ABORT;
> - int ret;
> -
> - pm8001_ha_dev->id |= NCQ_ABORT_ALL_FLAG;
> - pm8001_ha_dev->id &= ~NCQ_READ_LOG_FLAG;
> -
> - task = sas_alloc_slow_task(GFP_ATOMIC);
> - if (!task) {
> - pm8001_dbg(pm8001_ha, FAIL, "cannot allocate task\n");
> - return;
> - }
> - task->task_done = pm8001_task_done;
> -
> - ccb = pm8001_ccb_alloc(pm8001_ha, pm8001_ha_dev, task);
> - if (!ccb) {
> - sas_free_task(task);
> - return;
> - }
> -
> - memset(&task_abort, 0, sizeof(task_abort));
> - task_abort.abort_all = cpu_to_le32(1);
> - task_abort.device_id = cpu_to_le32(pm8001_ha_dev->device_id);
> - task_abort.tag = cpu_to_le32(ccb->ccb_tag);
> -
> - ret = pm8001_mpi_build_cmd(pm8001_ha, 0, opc, &task_abort,
> - sizeof(task_abort), 0);
> - pm8001_dbg(pm8001_ha, FAIL, "Executing abort task end\n");
> - if (ret) {
> - sas_free_task(task);
> - pm8001_ccb_free(pm8001_ha, ccb);
> - }
> -}
> -
> -static void pm80xx_send_read_log(struct pm8001_hba_info *pm8001_ha,
> - struct pm8001_device *pm8001_ha_dev)
> -{
> - struct sata_start_req sata_cmd;
> - int res;
> - struct pm8001_ccb_info *ccb;
> - struct sas_task *task = NULL;
> - struct host_to_dev_fis fis;
> - struct domain_device *dev;
> - u32 opc = OPC_INB_SATA_HOST_OPSTART;
> -
> - task = sas_alloc_slow_task(GFP_ATOMIC);
> - if (!task) {
> - pm8001_dbg(pm8001_ha, FAIL, "cannot allocate task !!!\n");
> - return;
> - }
> - task->task_done = pm8001_task_done;
> -
> - /*
> - * Allocate domain device by ourselves as libsas is not going to
> - * provide any.
> - */
> - dev = kzalloc(sizeof(struct domain_device), GFP_ATOMIC);
> - if (!dev) {
> - sas_free_task(task);
> - pm8001_dbg(pm8001_ha, FAIL,
> - "Domain device cannot be allocated\n");
> - return;
> - }
> -
> - task->dev = dev;
> - task->dev->lldd_dev = pm8001_ha_dev;
> -
> - ccb = pm8001_ccb_alloc(pm8001_ha, pm8001_ha_dev, task);
> - if (!ccb) {
> - sas_free_task(task);
> - kfree(dev);
> - return;
> - }
> -
> - pm8001_ha_dev->id |= NCQ_READ_LOG_FLAG;
> - pm8001_ha_dev->id |= NCQ_2ND_RLE_FLAG;
> -
> - memset(&sata_cmd, 0, sizeof(sata_cmd));
> -
> - /* construct read log FIS */
> - memset(&fis, 0, sizeof(struct host_to_dev_fis));
> - fis.fis_type = 0x27;
> - fis.flags = 0x80;
> - fis.command = ATA_CMD_READ_LOG_EXT;
> - fis.lbal = 0x10;
> - fis.sector_count = 0x1;
> -
> - sata_cmd.tag = cpu_to_le32(ccb->ccb_tag);
> - sata_cmd.device_id = cpu_to_le32(pm8001_ha_dev->device_id);
> - sata_cmd.ncqtag_atap_dir_m_dad = cpu_to_le32(((0x1 << 7) | (0x5 << 9)));
> - memcpy(&sata_cmd.sata_fis, &fis, sizeof(struct host_to_dev_fis));
> -
> - res = pm8001_mpi_build_cmd(pm8001_ha, 0, opc, &sata_cmd,
> - sizeof(sata_cmd), 0);
> - pm8001_dbg(pm8001_ha, FAIL, "Executing read log end\n");
> - if (res) {
> - sas_free_task(task);
> - pm8001_ccb_free(pm8001_ha, ccb);
> - kfree(dev);
> - }
> -}
> -
> /**
> * mpi_ssp_completion - process the event that FW response to the SSP request.
> * @pm8001_ha: our hba card information
> @@ -2402,11 +2295,9 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha,
> return;
> }
>
> - if ((pm8001_dev && !(pm8001_dev->id & NCQ_READ_LOG_FLAG))
> - && unlikely(!t || !t->lldd_task || !t->dev)) {
> - pm8001_dbg(pm8001_ha, FAIL, "task or dev null\n");
> +
> + if (pm8001_dev && unlikely(!t->lldd_task || !t->dev))
> return;
> - }
>
> ts = &t->task_status;
>
> @@ -2463,15 +2354,6 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha,
> if (param == 0) {
> ts->resp = SAS_TASK_COMPLETE;
> ts->stat = SAS_SAM_STAT_GOOD;
> - /* check if response is for SEND READ LOG */
> - if (pm8001_dev &&
> - (pm8001_dev->id & NCQ_READ_LOG_FLAG)) {
> - pm80xx_send_abort_all(pm8001_ha, pm8001_dev);
> - /* Free the tag */
> - pm8001_tag_free(pm8001_ha, tag);
> - sas_free_task(t);
> - return;
> - }
> } else {
> u8 len;
> ts->resp = SAS_TASK_COMPLETE;
> @@ -2806,9 +2688,11 @@ static void mpi_sata_event(struct pm8001_hba_info *pm8001_ha,
> if (event == IO_XFER_ERROR_ABORTED_NCQ_MODE) {
> /* find device using device id */
> pm8001_dev = pm8001_find_dev(pm8001_ha, dev_id);
> - /* send read log extension */
> + /* send read log extension by aborting the link - libata does what we want */
> if (pm8001_dev)
> - pm80xx_send_read_log(pm8001_ha, pm8001_dev);
> + pm8001_handle_event(pm8001_ha,
> + pm8001_dev,
> + IO_XFER_ERROR_ABORTED_NCQ_MODE);
> return;
> }
>
> @@ -4556,7 +4440,6 @@ static int pm80xx_chip_sata_req(struct pm8001_hba_info *pm8001_ha,
> u32 end_addr_high, end_addr_low;
> u32 ATAP = 0x0;
> u32 dir;
> - unsigned long flags;
> u32 opc = OPC_INB_SATA_HOST_OPSTART;
> memset(&sata_cmd, 0, sizeof(sata_cmd));
>
> @@ -4735,40 +4618,6 @@ static int pm80xx_chip_sata_req(struct pm8001_hba_info *pm8001_ha,
> (task->ata_task.atapi_packet[15] << 24)));
> }
>
> - /* Check for read log for failed drive and return */
> - if (sata_cmd.sata_fis.command == 0x2f) {
> - if (pm8001_ha_dev && ((pm8001_ha_dev->id & NCQ_READ_LOG_FLAG) ||
> - (pm8001_ha_dev->id & NCQ_ABORT_ALL_FLAG) ||
> - (pm8001_ha_dev->id & NCQ_2ND_RLE_FLAG))) {
> - struct task_status_struct *ts;
> -
> - pm8001_ha_dev->id &= 0xDFFFFFFF;
> - ts = &task->task_status;
> -
> - spin_lock_irqsave(&task->task_state_lock, flags);
> - ts->resp = SAS_TASK_COMPLETE;
> - ts->stat = SAS_SAM_STAT_GOOD;
> - task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
> - task->task_state_flags |= SAS_TASK_STATE_DONE;
> - if (unlikely((task->task_state_flags &
> - SAS_TASK_STATE_ABORTED))) {
> - spin_unlock_irqrestore(&task->task_state_lock,
> - flags);
> - pm8001_dbg(pm8001_ha, FAIL,
> - "task 0x%p resp 0x%x stat 0x%x but aborted by upper layer\n",
> - task, ts->resp,
> - ts->stat);
> - pm8001_ccb_task_free(pm8001_ha, ccb);
> - return 0;
> - } else {
> - spin_unlock_irqrestore(&task->task_state_lock,
> - flags);
> - pm8001_ccb_task_free_done(pm8001_ha, ccb);
> - atomic_dec(&pm8001_ha_dev->running_req);
> - return 0;
> - }
> - }
> - }
> trace_pm80xx_request_issue(pm8001_ha->id,
> ccb->device ? ccb->device->attached_phy : PM8001_MAX_PHYS,
> ccb->ccb_tag, opc,
> --
> 2.35.3
>
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