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FROMLIST: ufs: core: fix the issue of ICU failure

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When setting the ICU bit without using read-modify-write,
SQRTCy will restart SQ again and receive an RTC return
error code 2 (Failure - SQ not stopped).

Additionally, the error log has been modified so that
this type of error can be observed.

Bug: 373785306
Fixes: ab248643d3 ("scsi: ufs: core: Add error handling for MCQ mode")
Change-Id: I46fca8eaeaa17c622349b26f97fc100aa182dea2
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Bao D. Nguyen <quic_nguyenb@quicinc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/all/20241001091917.6917-2-peter.wang@mediatek.com/
This commit is contained in:
Peter Wang
2024-10-17 19:06:31 +08:00
committed by Sandeep Dhavale
parent 00f19bd9ed
commit 51903b71f0
1 changed files with 8 additions and 7 deletions
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15
drivers/ufs/core/ufs-mcq.c
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@@ -510,7 +510,7 @@ int ufshcd_mcq_sq_cleanup(struct ufs_hba *hba, int task_tag)
struct scsi_cmnd *cmd = lrbp->cmd;
struct ufs_hw_queue *hwq;
void __iomem *reg, *opr_sqd_base;
u32 nexus, id, val;
u32 nexus, id, val, rtc;
int err;
if (hba->quirks & UFSHCD_QUIRK_MCQ_BROKEN_RTC)
@@ -540,17 +540,18 @@ int ufshcd_mcq_sq_cleanup(struct ufs_hba *hba, int task_tag)
opr_sqd_base = mcq_opr_base(hba, OPR_SQD, id);
writel(nexus, opr_sqd_base + REG_SQCTI);
/* SQRTCy.ICU = 1 */
writel(SQ_ICU, opr_sqd_base + REG_SQRTC);
/* Initiate Cleanup */
writel(readl(opr_sqd_base + REG_SQRTC) | SQ_ICU,
opr_sqd_base + REG_SQRTC);
/* Poll SQRTSy.CUS = 1. Return result from SQRTSy.RTC */
reg = opr_sqd_base + REG_SQRTS;
err = read_poll_timeout(readl, val, val & SQ_CUS, 20,
MCQ_POLL_US, false, reg);
if (err)
dev_err(hba->dev, "%s: failed. hwq=%d, tag=%d err=%ld\n",
__func__, id, task_tag,
FIELD_GET(SQ_ICU_ERR_CODE_MASK, readl(reg)));
rtc = FIELD_GET(SQ_ICU_ERR_CODE_MASK, readl(reg));
if (err || rtc)
dev_err(hba->dev, "%s: failed. hwq=%d, tag=%d err=%d RTC=%d\n",
__func__, id, task_tag, err, rtc);
if (ufshcd_mcq_sq_start(hba, hwq))
err = -ETIMEDOUT;