linux-kernel - [PATCH v3 2/4] scsi: ufs: Re-use exec_dev

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Message-ID: <20240309081104.5006-3-avri.altman@wdc.com>
Date: Sat,  9 Mar 2024 10:11:00 +0200
From: Avri Altman <avri.altman@....com>
To: "James E . J . Bottomley" <jejb@...ux.ibm.com>,
	"Martin K . Petersen" <martin.petersen@...cle.com>
Cc: Bart Van Assche <bvanassche@....org>,
	Bean Huo <beanhuo@...ron.com>,
	linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Avri Altman <avri.altman@....com>
Subject: [PATCH v3 2/4] scsi: ufs: Re-use exec_dev_cmd

Move out the actual command issue from exec_dev_cmd so it can be used
elsewhere.  While at it, remove a redundant "lrbp->cmd = NULL"
assignment.

Also, the device management commands that are originated from the
ufs-bsg code path, are being traced now, which wasn't the case before.

Signed-off-by: Avri Altman <avri.altman@....com>
---
 drivers/ufs/core/ufshcd.c | 53 ++++++++++++++++++---------------------
 1 file changed, 24 insertions(+), 29 deletions(-)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 983b7b8e3c7c..3f62ad7b4062 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -3286,6 +3286,25 @@ static void ufshcd_dev_man_unlock(struct ufs_hba *hba)
 	ufshcd_release(hba);
 }
 
+static int ufshcd_issue_dev_cmd(struct ufs_hba *hba, struct ufshcd_lrb *lrbp,
+			  const u32 tag, int timeout)
+{
+	DECLARE_COMPLETION_ONSTACK(wait);
+	int err;
+
+	hba->dev_cmd.complete = &wait;
+
+	ufshcd_add_query_upiu_trace(hba, UFS_QUERY_SEND, lrbp->ucd_req_ptr);
+
+	ufshcd_send_command(hba, tag, hba->dev_cmd_queue);
+	err = ufshcd_wait_for_dev_cmd(hba, lrbp, timeout);
+
+	ufshcd_add_query_upiu_trace(hba, err ? UFS_QUERY_ERR : UFS_QUERY_COMP,
+				    (struct utp_upiu_req *)lrbp->ucd_rsp_ptr);
+
+	return err;
+}
+
 /**
  * ufshcd_exec_dev_cmd - API for sending device management requests
  * @hba: UFS hba
@@ -3300,31 +3319,18 @@ static void ufshcd_dev_man_unlock(struct ufs_hba *hba)
 static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
 		enum dev_cmd_type cmd_type, int timeout)
 {
-	DECLARE_COMPLETION_ONSTACK(wait);
 	const u32 tag = hba->reserved_slot;
-	struct ufshcd_lrb *lrbp;
+	struct ufshcd_lrb *lrbp = &hba->lrb[tag];
 	int err;
 
 	/* Protects use of hba->reserved_slot. */
 	lockdep_assert_held(&hba->dev_cmd.lock);
 
-	lrbp = &hba->lrb[tag];
-	lrbp->cmd = NULL;
 	err = ufshcd_compose_dev_cmd(hba, lrbp, cmd_type, tag);
 	if (unlikely(err))
-		goto out;
-
-	hba->dev_cmd.complete = &wait;
-
-	ufshcd_add_query_upiu_trace(hba, UFS_QUERY_SEND, lrbp->ucd_req_ptr);
-
-	ufshcd_send_command(hba, tag, hba->dev_cmd_queue);
-	err = ufshcd_wait_for_dev_cmd(hba, lrbp, timeout);
-	ufshcd_add_query_upiu_trace(hba, err ? UFS_QUERY_ERR : UFS_QUERY_COMP,
-				    (struct utp_upiu_req *)lrbp->ucd_rsp_ptr);
+		return err;
 
-out:
-	return err;
+	return ufshcd_issue_dev_cmd(hba, lrbp, tag, timeout);
 }
 
 /**
@@ -7206,7 +7212,6 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba,
 					enum dev_cmd_type cmd_type,
 					enum query_opcode desc_op)
 {
-	DECLARE_COMPLETION_ONSTACK(wait);
 	const u32 tag = hba->reserved_slot;
 	struct ufshcd_lrb *lrbp;
 	int err = 0;
@@ -7246,17 +7251,12 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba,
 
 	memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp));
 
-	hba->dev_cmd.complete = &wait;
-
-	ufshcd_add_query_upiu_trace(hba, UFS_QUERY_SEND, lrbp->ucd_req_ptr);
-
-	ufshcd_send_command(hba, tag, hba->dev_cmd_queue);
 	/*
 	 * ignore the returning value here - ufshcd_check_query_response is
 	 * bound to fail since dev_cmd.query and dev_cmd.type were left empty.
 	 * read the response directly ignoring all errors.
 	 */
-	ufshcd_wait_for_dev_cmd(hba, lrbp, QUERY_REQ_TIMEOUT);
+	ufshcd_issue_dev_cmd(hba, lrbp, tag, QUERY_REQ_TIMEOUT);
 
 	/* just copy the upiu response as it is */
 	memcpy(rsp_upiu, lrbp->ucd_rsp_ptr, sizeof(*rsp_upiu));
@@ -7371,7 +7371,6 @@ int ufshcd_advanced_rpmb_req_handler(struct ufs_hba *hba, struct utp_upiu_req *r
 			 struct ufs_ehs *rsp_ehs, int sg_cnt, struct scatterlist *sg_list,
 			 enum dma_data_direction dir)
 {
-	DECLARE_COMPLETION_ONSTACK(wait);
 	const u32 tag = hba->reserved_slot;
 	struct ufshcd_lrb *lrbp;
 	int err = 0;
@@ -7418,11 +7417,7 @@ int ufshcd_advanced_rpmb_req_handler(struct ufs_hba *hba, struct utp_upiu_req *r
 
 	memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp));
 
-	hba->dev_cmd.complete = &wait;
-
-	ufshcd_send_command(hba, tag, hba->dev_cmd_queue);
-
-	err = ufshcd_wait_for_dev_cmd(hba, lrbp, ADVANCED_RPMB_REQ_TIMEOUT);
+	err = ufshcd_issue_dev_cmd(hba, lrbp, tag, ADVANCED_RPMB_REQ_TIMEOUT);
 
 	if (!err) {
 		/* Just copy the upiu response as it is */
-- 
2.42.0