linux-kernel - [PATCH 1/4] scsi: ufs: core: Fix mcq tag calcualtion

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Message-ID: <20230221152919.25837-2-powen.kao@mediatek.com>
Date:   Tue, 21 Feb 2023 23:29:14 +0800
From:   Po-Wen Kao <powen.kao@...iatek.com>
To:     Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Bart Van Assche <bvanassche@....org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <wsd_upstream@...iatek.com>, <peter.wang@...iatek.com>,
        <stanley.chu@...iatek.com>, <powen.kao@...iatek.com>,
        <alice.chao@...iatek.com>, <naomi.chu@...iatek.com>,
        <chun-hung.wu@...iatek.com>, <cc.chou@...iatek.com>,
        <eddie.huang@...iatek.com>, <mason.zhang@...iatek.com>,
        <chaotian.jing@...iatek.com>, <jiajie.hao@...iatek.com>,
        <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: [PATCH 1/4] scsi: ufs: core: Fix mcq tag calcualtion

Transfer command descriptor is allocated in ufshcd_memory_alloc()
and referenced by transfer request descriptor with stride size
sizeof_utp_transfer_cmd_desc()
instead of
sizeof(struct utp_transfer_cmd_desc).

Consequently, computing tag by address offset should also refer to the
same stride.

As suggested, sizeof_utp_transfer_cmd_desc() is further renamed to
ufshcd_get_ucd_size().

Signed-off-by: Po-Wen Kao <powen.kao@...iatek.com>
---
 drivers/ufs/core/ufs-mcq.c | 2 +-
 drivers/ufs/core/ufshcd.c  | 8 ++++----
 include/ufs/ufshcd.h       | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
index 31df052fbc41..a39746b2a8be 100644
--- a/drivers/ufs/core/ufs-mcq.c
+++ b/drivers/ufs/core/ufs-mcq.c
@@ -265,7 +265,7 @@ static int ufshcd_mcq_get_tag(struct ufs_hba *hba,
 	addr = (le64_to_cpu(cqe->command_desc_base_addr) & CQE_UCD_BA) -
 		hba->ucdl_dma_addr;
 
-	return div_u64(addr, sizeof(struct utp_transfer_cmd_desc));
+	return div_u64(addr, ufshcd_get_ucd_size(hba));
 }
 
 static void ufshcd_mcq_process_cqe(struct ufs_hba *hba,
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 3b3cf78d3b10..81c9f07ebfc8 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -2823,10 +2823,10 @@ static void ufshcd_map_queues(struct Scsi_Host *shost)
 static void ufshcd_init_lrb(struct ufs_hba *hba, struct ufshcd_lrb *lrb, int i)
 {
 	struct utp_transfer_cmd_desc *cmd_descp = (void *)hba->ucdl_base_addr +
-		i * sizeof_utp_transfer_cmd_desc(hba);
+		i * ufshcd_get_ucd_size(hba);
 	struct utp_transfer_req_desc *utrdlp = hba->utrdl_base_addr;
 	dma_addr_t cmd_desc_element_addr = hba->ucdl_dma_addr +
-		i * sizeof_utp_transfer_cmd_desc(hba);
+		i * ufshcd_get_ucd_size(hba);
 	u16 response_offset = offsetof(struct utp_transfer_cmd_desc,
 				       response_upiu);
 	u16 prdt_offset = offsetof(struct utp_transfer_cmd_desc, prd_table);
@@ -3735,7 +3735,7 @@ static int ufshcd_memory_alloc(struct ufs_hba *hba)
 	size_t utmrdl_size, utrdl_size, ucdl_size;
 
 	/* Allocate memory for UTP command descriptors */
-	ucdl_size = sizeof_utp_transfer_cmd_desc(hba) * hba->nutrs;
+	ucdl_size = ufshcd_get_ucd_size(hba) * hba->nutrs;
 	hba->ucdl_base_addr = dmam_alloc_coherent(hba->dev,
 						  ucdl_size,
 						  &hba->ucdl_dma_addr,
@@ -3835,7 +3835,7 @@ static void ufshcd_host_memory_configure(struct ufs_hba *hba)
 	prdt_offset =
 		offsetof(struct utp_transfer_cmd_desc, prd_table);
 
-	cmd_desc_size = sizeof_utp_transfer_cmd_desc(hba);
+	cmd_desc_size = ufshcd_get_ucd_size(hba);
 	cmd_desc_dma_addr = hba->ucdl_dma_addr;
 
 	for (i = 0; i < hba->nutrs; i++) {
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index ed9e3d5addb3..8f79cca449e1 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -1136,7 +1136,7 @@ static inline size_t ufshcd_sg_entry_size(const struct ufs_hba *hba)
 	({ (void)(hba); BUILD_BUG_ON(sg_entry_size != sizeof(struct ufshcd_sg_entry)); })
 #endif
 
-static inline size_t sizeof_utp_transfer_cmd_desc(const struct ufs_hba *hba)
+static inline size_t ufshcd_get_ucd_size(const struct ufs_hba *hba)
 {
 	return sizeof(struct utp_transfer_cmd_desc) + SG_ALL * ufshcd_sg_entry_size(hba);
 }
-- 
2.18.0