linux-kernel - [PATCH v2] scsi: ufs: core: Process abort completed command in MCQ mode

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Date:   Fri, 10 Nov 2023 10:36:16 +0900
From:   SEO HOYOUNG <hy50.seo@...sung.com>
To:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        alim.akhtar@...sung.com, avri.altman@....com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, beanhuo@...ron.com, bvanassche@....org,
        kwangwon.min@...sung.com, kwmad.kim@...sung.com,
        sh425.lee@...sung.com, sc.suh@...sung.com,
        quic_nguyenb@...cinc.com, cpgs@...sung.com
Cc:     SEO HOYOUNG <hy50.seo@...sung.com>
Subject: [PATCH v2] scsi: ufs: core: Process abort completed command in MCQ
 mode

In MCQ mode, the case where OCS is updated to aborted is as follows
 1. when abort processing is completed
 2. When a duplicate command occurs

In case of 1 situation, cmd should be re-request.
So in the case of cmd whose abort processing is completed in MCQ mode,
the ufs driver needs to update to scsi with DID_REQUEUE.

v1->v2: change the method of determinging mcq and legacy mode.
check cqe value for checking mcq mode

Signed-off-by: SEO HOYOUNG <hy50.seo@...sung.com>
---
 drivers/ufs/core/ufshcd.c | 8 +++++++-
 include/ufs/ufshci.h      | 1 +
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 68d7da02944f..9a730a794b66 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -5307,6 +5307,7 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp,
 	enum utp_ocs ocs;
 	u8 upiu_flags;
 	u32 resid;
+	u8 eec;
 
 	upiu_flags = lrbp->ucd_rsp_ptr->header.flags;
 	resid = be32_to_cpu(lrbp->ucd_rsp_ptr->sr.residual_transfer_count);
@@ -5371,7 +5372,12 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp,
 		}
 		break;
 	case OCS_ABORTED:
-		result |= DID_ABORT << 16;
+		if (cqe) {
+			eec = le32_to_cpu(cqe->status) & MASK_EEC;
+			result |= eec ? (DID_ABORT << 16) : (DID_REQUEUE << 16);
+		} else {
+			result |= DID_ABORT << 16;
+		}
 		break;
 	case OCS_INVALID_COMMAND_STATUS:
 		result |= DID_REQUEUE << 16;
diff --git a/include/ufs/ufshci.h b/include/ufs/ufshci.h
index d5accacae6bc..9aefc7e6d0fc 100644
--- a/include/ufs/ufshci.h
+++ b/include/ufs/ufshci.h
@@ -465,6 +465,7 @@ enum utp_ocs {
 
 enum {
 	MASK_OCS			= 0x0F,
+	MASK_EEC			= 0xF0,
 };
 
 /* The maximum length of the data byte count field in the PRDT is 256KB */
-- 
2.26.0