From: Yaniv Gardi <ygardi@codeaurora.org>
To: robherring2@gmail.com, James.Bottomley@HansenPartnership.com,
pebolle@tiscali.nl, hch@infradead.org
Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
linux-arm-msm@vger.kernel.org, santoshsy@gmail.com,
linux-scsi-owner@vger.kernel.org, subhashj@codeaurora.org,
ygardi@codeaurora.org, gbroner@codeaurora.org,
draviv@codeaurora.org, Vinayak Holikatti <vinholikatti@gmail.com>,
"James E.J. Bottomley" <JBottomley@odin.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>
Subject: [PATCH v7 14/14] scsi: ufs: add wrapper for retrying sending query attribute
Date: Mon, 1 Feb 2016 15:02:50 +0200 [thread overview]
Message-ID: <1454331770-29642-15-git-send-email-ygardi@codeaurora.org> (raw)
In-Reply-To: <1454331770-29642-1-git-send-email-ygardi@codeaurora.org>
Sometimes queries from the device might return a failure so it is
recommended to retry sending the query, before giving up.
This change adds a wrapper to retry sending a query attribute,
in cases where we need to wait longer, before we continue,
or before reporting a failure.
Reviewed-by: Gilad Broner <gbroner@codeaurora.org>
Reviewed-by: Dolev Raviv <draviv@codeaurora.org>
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
---
drivers/scsi/ufs/ufshcd.c | 51 ++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 44 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 2fc678d..7ab6a45 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1821,6 +1821,43 @@ out:
}
/**
+ * ufshcd_query_attr_retry() - API function for sending query
+ * attribute with retries
+ * @hba: per-adapter instance
+ * @opcode: attribute opcode
+ * @idn: attribute idn to access
+ * @index: index field
+ * @selector: selector field
+ * @attr_val: the attribute value after the query request
+ * completes
+ *
+ * Returns 0 for success, non-zero in case of failure
+*/
+static int ufshcd_query_attr_retry(struct ufs_hba *hba,
+ enum query_opcode opcode, enum attr_idn idn, u8 index, u8 selector,
+ u32 *attr_val)
+{
+ int ret = 0;
+ u32 retries;
+
+ for (retries = QUERY_REQ_RETRIES; retries > 0; retries--) {
+ ret = ufshcd_query_attr(hba, opcode, idn, index,
+ selector, attr_val);
+ if (ret)
+ dev_dbg(hba->dev, "%s: failed with error %d, retries %d\n",
+ __func__, ret, retries);
+ else
+ break;
+ }
+
+ if (ret)
+ dev_err(hba->dev,
+ "%s: query attribute, idn %d, failed with error %d after %d retires\n",
+ __func__, idn, ret, QUERY_REQ_RETRIES);
+ return ret;
+}
+
+/**
* ufshcd_query_descriptor - API function for sending descriptor requests
* hba: per-adapter instance
* opcode: attribute opcode
@@ -3401,7 +3438,7 @@ static int ufshcd_disable_ee(struct ufs_hba *hba, u16 mask)
val = hba->ee_ctrl_mask & ~mask;
val &= 0xFFFF; /* 2 bytes */
- err = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
+ err = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
QUERY_ATTR_IDN_EE_CONTROL, 0, 0, &val);
if (!err)
hba->ee_ctrl_mask &= ~mask;
@@ -3429,7 +3466,7 @@ static int ufshcd_enable_ee(struct ufs_hba *hba, u16 mask)
val = hba->ee_ctrl_mask | mask;
val &= 0xFFFF; /* 2 bytes */
- err = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
+ err = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
QUERY_ATTR_IDN_EE_CONTROL, 0, 0, &val);
if (!err)
hba->ee_ctrl_mask |= mask;
@@ -3535,7 +3572,7 @@ static void ufshcd_force_reset_auto_bkops(struct ufs_hba *hba)
static inline int ufshcd_get_bkops_status(struct ufs_hba *hba, u32 *status)
{
- return ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,
+ return ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
QUERY_ATTR_IDN_BKOPS_STATUS, 0, 0, status);
}
@@ -3598,7 +3635,7 @@ static int ufshcd_urgent_bkops(struct ufs_hba *hba)
static inline int ufshcd_get_ee_status(struct ufs_hba *hba, u32 *status)
{
- return ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,
+ return ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
QUERY_ATTR_IDN_EE_STATUS, 0, 0, status);
}
@@ -4352,9 +4389,9 @@ static void ufshcd_init_icc_levels(struct ufs_hba *hba)
dev_dbg(hba->dev, "%s: setting icc_level 0x%x",
__func__, hba->init_prefetch_data.icc_level);
- ret = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
- QUERY_ATTR_IDN_ACTIVE_ICC_LVL, 0, 0,
- &hba->init_prefetch_data.icc_level);
+ ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
+ QUERY_ATTR_IDN_ACTIVE_ICC_LVL, 0, 0,
+ &hba->init_prefetch_data.icc_level);
if (ret)
dev_err(hba->dev,
--
1.8.5.2
--
QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
next prev parent reply other threads:[~2016-02-01 13:02 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-01 13:02 [PATCH v7 00/14] Big fixes, retries, handle a race condition Yaniv Gardi
2016-02-01 13:02 ` [PATCH v7 01/14] scsi: ufs: clear UTRD, UPIU req and rsp before new transfers Yaniv Gardi
2016-02-01 13:02 ` [PATCH v7 02/14] scsi: ufs: clear fields " Yaniv Gardi
2016-02-02 10:07 ` Winkler, Tomas
2016-02-01 13:02 ` [PATCH v7 03/14] scsi: ufs: verify command tag validity Yaniv Gardi
2016-02-01 13:02 ` [PATCH v7 04/14] scsi: ufs: clear outstanding_request bit in case query timeout Yaniv Gardi
2016-02-01 13:02 ` [PATCH v7 05/14] scsi: ufs: increase fDeviceInit query response timeout Yaniv Gardi
2016-02-01 13:02 ` [PATCH v7 06/14] scsi: ufs: avoid exception event handler racing with PM callbacks Yaniv Gardi
2016-02-01 13:02 ` [PATCH v7 07/14] scsi: ufs: add retries to dme_peer get and set attribute Yaniv Gardi
2016-02-01 13:02 ` [PATCH v7 08/14] scsi: ufs: add retries for hibern8 enter Yaniv Gardi
2016-02-01 13:02 ` [PATCH v7 09/14] scsi: ufs: fix error recovery after the hibern8 exit failure Yaniv Gardi
2016-02-01 13:02 ` [PATCH v7 10/14] scsi: ufs: retry failed query flag requests Yaniv Gardi
2016-02-01 13:02 ` [PATCH v7 11/14] scsi: ufs: reduce the interrupts for power mode change requests Yaniv Gardi
2016-02-01 13:02 ` [PATCH v7 12/14] scsi: ufs: add missing memory barriers Yaniv Gardi
2016-02-01 13:02 ` [PATCH v7 13/14] scsi: ufs: commit descriptors before setting the doorbell Yaniv Gardi
2016-02-01 13:02 ` Yaniv Gardi [this message]
2016-02-11 1:48 ` [PATCH v7 00/14] Big fixes, retries, handle a race condition Martin K. Petersen
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