linux-kernel - Re: [PATCH] scsi: libsas: Add end eh callback

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Date:   Tue, 21 Mar 2023 15:49:12 +0800
From:   yangxingui <yangxingui@...wei.com>
To:     <jejb@...ux.ibm.com>, <martin.petersen@...cle.com>,
        <john.g.garry@...cle.com>
CC:     <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...wei.com>, <prime.zeng@...ilicon.com>,
        <kangfenglong@...wei.com>
Subject: Re: [PATCH] scsi: libsas: Add end eh callback

Sorry, please ignore this patch and I have resend a new one.

On 2023/3/21 15:22, Xingui Yang wrote:
> If an error occurs while the disk is processing an NCQ command and the host
> received the abnormal SDB FIS, let libata EH to analyze the NCQ error, and
> it is not necessary to reset the target to recover.
> 
> Then the hisi_sas has some special process to set dev_status to normal when
> end the eh for NCQ error without reset the target, so add a callback and
> fill it in for the hisi_sas driver.
> 
> Signed-off-by: Xingui Yang <yangxingui@...wei.com>
> ---
>   drivers/scsi/hisi_sas/hisi_sas_main.c  | 12 +++++++++---
>   drivers/scsi/hisi_sas/hisi_sas_v3_hw.c |  7 +++++--
>   drivers/scsi/libsas/sas_ata.c          |  4 ++++
>   include/scsi/libsas.h                  |  2 ++
>   4 files changed, 20 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
> index 325d6d6a21c3..61686ead0027 100644
> --- a/drivers/scsi/hisi_sas/hisi_sas_main.c
> +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
> @@ -1777,9 +1777,6 @@ static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
>   	struct device *dev = hisi_hba->dev;
>   	int rc;
>   
> -	if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
> -		sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
> -
>   	rc = hisi_sas_internal_task_abort_dev(sas_dev, false);
>   	if (rc < 0) {
>   		dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
> @@ -1967,6 +1964,14 @@ static bool hisi_sas_internal_abort_timeout(struct sas_task *task,
>   	return false;
>   }
>   
> +static void hisi_sas_end_eh(struct domain_device *dev)
> +{
> +	struct hisi_sas_device *sas_dev = dev->lldd_dev;
> +
> +	if (sas_dev->dev_status == HISI_SAS_DEV_NCQ_ERR)
> +		sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
> +}
> +
>   static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
>   {
>   	hisi_sas_port_notify_formed(sas_phy);
> @@ -2083,6 +2088,7 @@ static struct sas_domain_function_template hisi_sas_transport_ops = {
>   	.lldd_write_gpio	= hisi_sas_write_gpio,
>   	.lldd_tmf_aborted	= hisi_sas_tmf_aborted,
>   	.lldd_abort_timeout	= hisi_sas_internal_abort_timeout,
> +	.lldd_end_eh		= hisi_sas_end_eh,
>   };
>   
>   void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
> diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
> index 66fcb340b98e..abad57de4aee 100644
> --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
> +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
> @@ -2433,15 +2433,18 @@ static int complete_v3_hw(struct hisi_sas_cq *cq)
>   			struct hisi_sas_device *sas_dev =
>   				&hisi_hba->devices[device_id];
>   			struct domain_device *device = sas_dev->sas_device;
> +			bool force_reset = true;
>   
>   			dev_err(dev, "erroneous completion disk err dev id=%d sas_addr=0x%llx CQ hdr: 0x%x 0x%x 0x%x 0x%x\n",
>   				device_id, itct->sas_addr, dw0, dw1,
>   				complete_hdr->act, dw3);
>   
> -			if (is_ncq_err_v3_hw(complete_hdr))
> +			if (is_ncq_err_v3_hw(complete_hdr)) {
>   				sas_dev->dev_status = HISI_SAS_DEV_NCQ_ERR;
> +				force_reset = false;
> +			}
>   
> -			sas_ata_device_link_abort(device, true);
> +			sas_ata_device_link_abort(device, force_reset);
>   		} else if (likely(iptt < HISI_SAS_COMMAND_ENTRIES_V3_HW)) {
>   			slot = &hisi_hba->slot_info[iptt];
>   			slot->cmplt_queue_slot = rd_point;
> diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
> index 77714a495cbb..2d48643a08cf 100644
> --- a/drivers/scsi/libsas/sas_ata.c
> +++ b/drivers/scsi/libsas/sas_ata.c
> @@ -539,6 +539,10 @@ void sas_ata_end_eh(struct ata_port *ap)
>   	spin_lock_irqsave(&ha->lock, flags);
>   	if (test_and_clear_bit(SAS_DEV_EH_PENDING, &dev->state))
>   		ha->eh_active--;
> +
> +	if (i->dft->lldd_end_eh)
> +		i->dft->lldd_end_eh(device);
> +
>   	spin_unlock_irqrestore(&ha->lock, flags);
>   }
>   
> diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
> index 159823e0afbf..659395ef616e 100644
> --- a/include/scsi/libsas.h
> +++ b/include/scsi/libsas.h
> @@ -683,6 +683,8 @@ struct sas_domain_function_template {
>   	int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
>   	int (*lldd_query_task)(struct sas_task *);
>   
> +	void (*lldd_end_eh)(struct domain_device *dev);
> +
>   	/* Special TMF callbacks */
>   	void (*lldd_tmf_exec_complete)(struct domain_device *dev);
>   	void (*lldd_tmf_aborted)(struct sas_task *task);
>