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scsi: ufs: core: Support UFSHCI 4.1 CQ entry tag

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The UFSHCI 4.1 specification introduces a new completion queue (CQ) entry
format, allowing the tag to be obtained directly.

Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20260210071834.1837878-1-peter.wang@mediatek.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Peter Wang 2026-02-10 15:17:30 +08:00 committed by Martin K. Petersen
parent 3abe4113e7
commit f707860ebc
1 changed files with 6 additions and 1 deletions
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7
drivers/ufs/core/ufs-mcq.c
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@ -273,13 +273,18 @@ void ufshcd_mcq_write_cqis(struct ufs_hba *hba, u32 val, int i)
EXPORT_SYMBOL_GPL(ufshcd_mcq_write_cqis);
/*
* Current MCQ specification doesn't provide a Task Tag or its equivalent in
* UFSHCI 4.0 MCQ specification doesn't provide a Task Tag or its equivalent in
* the Completion Queue Entry. Find the Task Tag using an indirect method.
* UFSHCI 4.1 and above can directly return the Task Tag in the Completion Queue
* Entry.
*/
static int ufshcd_mcq_get_tag(struct ufs_hba *hba, struct cq_entry *cqe)
{
u64 addr;
if (hba->ufs_version >= ufshci_version(4, 1))
return cqe->task_tag;
/* sizeof(struct utp_transfer_cmd_desc) must be a multiple of 128 */
BUILD_BUG_ON(sizeof(struct utp_transfer_cmd_desc) & GENMASK(6, 0));