From: Kashyap Desai <kashyap.desai@broadcom.com>
Date: Thu, 20 May 2021 15:25:41 +0000 (+0530)
Subject: scsi: mpi3mr: Wait for pending I/O completions upon detection of VD I/O timeout
X-Git-Tag: accepted/tizen/unified/20230118.172025~6832^2~171
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=44dc724f5eecf6ef8ea493e0f0198f297e1c7306;p=platform%2Fkernel%2Flinux-rpi.git

scsi: mpi3mr: Wait for pending I/O completions upon detection of VD I/O timeout

Wait for host I/O completion (default 180 seconds) if I/O timeout is
detected on VDs.

Link: https://lore.kernel.org/r/20210520152545.2710479-21-kashyap.desai@broadcom.com
Cc: sathya.prakash@broadcom.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/scsi/mpi3mr/mpi3mr.h b/drivers/scsi/mpi3mr/mpi3mr.h
index 5a3a1374..372ce0e 100644
--- a/drivers/scsi/mpi3mr/mpi3mr.h
+++ b/drivers/scsi/mpi3mr/mpi3mr.h
@@ -107,6 +107,7 @@ extern struct list_head mrioc_list;
 #define MPI3MR_RESET_HOST_IOWAIT_TIMEOUT	5
 #define MPI3MR_TSUPDATE_INTERVAL		900
 #define MPI3MR_DEFAULT_SHUTDOWN_TIME		120
+#define	MPI3MR_RAID_ERRREC_RESET_TIMEOUT	180
 
 #define MPI3MR_WATCHDOG_INTERVAL		1000 /* in milli seconds */
 
diff --git a/drivers/scsi/mpi3mr/mpi3mr_fw.c b/drivers/scsi/mpi3mr/mpi3mr_fw.c
index 605015e..813b0bc 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_fw.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_fw.c
@@ -3765,6 +3765,8 @@ int mpi3mr_soft_reset_handler(struct mpi3mr_ioc *mrioc,
 		}
 	}
 
+	mpi3mr_wait_for_host_io(mrioc, MPI3MR_RESET_HOST_IOWAIT_TIMEOUT);
+
 	mpi3mr_ioc_disable_intr(mrioc);
 
 	if (snapdump) {
diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c
index e36a502..e63db7c 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_os.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_os.c
@@ -2410,6 +2410,43 @@ static void mpi3mr_print_pending_host_io(struct mpi3mr_ioc *mrioc)
 }
 
 /**
+ * mpi3mr_wait_for_host_io - block for I/Os to complete
+ * @mrioc: Adapter instance reference
+ * @timeout: time out in seconds
+ * Waits for pending I/Os for the given adapter to complete or
+ * to hit the timeout.
+ *
+ * Return: Nothing
+ */
+void mpi3mr_wait_for_host_io(struct mpi3mr_ioc *mrioc, u32 timeout)
+{
+	enum mpi3mr_iocstate iocstate;
+	int i = 0;
+
+	iocstate = mpi3mr_get_iocstate(mrioc);
+	if (iocstate != MRIOC_STATE_READY)
+		return;
+
+	if (!mpi3mr_get_fw_pending_ios(mrioc))
+		return;
+	ioc_info(mrioc,
+	    "%s :Waiting for %d seconds prior to reset for %d I/O\n",
+	    __func__, timeout, mpi3mr_get_fw_pending_ios(mrioc));
+
+	for (i = 0; i < timeout; i++) {
+		if (!mpi3mr_get_fw_pending_ios(mrioc))
+			break;
+		iocstate = mpi3mr_get_iocstate(mrioc);
+		if (iocstate != MRIOC_STATE_READY)
+			break;
+		msleep(1000);
+	}
+
+	ioc_info(mrioc, "%s :Pending I/Os after wait is: %d\n", __func__,
+	    mpi3mr_get_fw_pending_ios(mrioc));
+}
+
+/**
  * mpi3mr_eh_host_reset - Host reset error handling callback
  * @scmd: SCSI command reference
  *
@@ -2423,8 +2460,26 @@ static void mpi3mr_print_pending_host_io(struct mpi3mr_ioc *mrioc)
 static int mpi3mr_eh_host_reset(struct scsi_cmnd *scmd)
 {
 	struct mpi3mr_ioc *mrioc = shost_priv(scmd->device->host);
+	struct mpi3mr_stgt_priv_data *stgt_priv_data;
+	struct mpi3mr_sdev_priv_data *sdev_priv_data;
+	u8 dev_type = MPI3_DEVICE_DEVFORM_VD;
 	int retval = FAILED, ret;
 
+	sdev_priv_data = scmd->device->hostdata;
+	if (sdev_priv_data && sdev_priv_data->tgt_priv_data) {
+		stgt_priv_data = sdev_priv_data->tgt_priv_data;
+		dev_type = stgt_priv_data->dev_type;
+	}
+
+	if (dev_type == MPI3_DEVICE_DEVFORM_VD) {
+		mpi3mr_wait_for_host_io(mrioc,
+		    MPI3MR_RAID_ERRREC_RESET_TIMEOUT);
+		if (!mpi3mr_get_fw_pending_ios(mrioc)) {
+			retval = SUCCESS;
+			goto out;
+		}
+	}
+
 	mpi3mr_print_pending_host_io(mrioc);
 	ret = mpi3mr_soft_reset_handler(mrioc,
 	    MPI3MR_RESET_FROM_EH_HOS, 1);