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From: Don Brace <don.brace@microchip.com>
To: <Kevin.Barnett@microchip.com>, <scott.teel@microchip.com>,
	<Justin.Lindley@microchip.com>, <scott.benesh@microchip.com>,
	<gerry.morong@microchip.com>, <mahesh.rajashekhara@microchip.com>,
	<hch@infradead.org>, <jejb@linux.vnet.ibm.com>,
	<joseph.szczypek@hpe.com>, <POSWALD@suse.com>
Cc: <linux-scsi@vger.kernel.org>
Subject: [PATCH V2 03/25] smartpqi: refactor build sg list code
Date: Tue, 8 Dec 2020 13:36:52 -0600	[thread overview]
Message-ID: <160745621250.13450.3396484024045806277.stgit@brunhilda> (raw)
In-Reply-To: <160745609917.13450.11882890596851148601.stgit@brunhilda>

* No functional changes.
* Factor out code common to all s/g list building.

Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
---
 drivers/scsi/smartpqi/smartpqi_init.c |  101 ++++++++++++++-------------------
 1 file changed, 42 insertions(+), 59 deletions(-)

diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index 2348b9f24d8c..6bcb037ae9d7 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -4857,16 +4857,52 @@ static inline void pqi_set_sg_descriptor(
 	put_unaligned_le32(0, &sg_descriptor->flags);
 }
 
+static unsigned int pqi_build_sg_list(struct pqi_sg_descriptor *sg_descriptor,
+	struct scatterlist *sg, int sg_count, struct pqi_io_request *io_request,
+	int max_sg_per_iu, bool *chained)
+{
+	int i;
+	unsigned int num_sg_in_iu;
+
+	*chained = false;
+	i = 0;
+	num_sg_in_iu = 0;
+	max_sg_per_iu--;	/* Subtract 1 to leave room for chain marker. */
+
+	while (1) {
+		pqi_set_sg_descriptor(sg_descriptor, sg);
+		if (!*chained)
+			num_sg_in_iu++;
+		i++;
+		if (i == sg_count)
+			break;
+		sg_descriptor++;
+		if (i == max_sg_per_iu) {
+			put_unaligned_le64((u64)io_request->sg_chain_buffer_dma_handle,
+				&sg_descriptor->address);
+			put_unaligned_le32((sg_count - num_sg_in_iu) * sizeof(*sg_descriptor),
+				&sg_descriptor->length);
+			put_unaligned_le32(CISS_SG_CHAIN, &sg_descriptor->flags);
+			*chained = true;
+			num_sg_in_iu++;
+			sg_descriptor = io_request->sg_chain_buffer;
+		}
+		sg = sg_next(sg);
+	}
+
+	put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
+
+	return num_sg_in_iu;
+}
+
 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
 	struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
 	struct pqi_io_request *io_request)
 {
-	int i;
 	u16 iu_length;
 	int sg_count;
 	bool chained;
 	unsigned int num_sg_in_iu;
-	unsigned int max_sg_per_iu;
 	struct scatterlist *sg;
 	struct pqi_sg_descriptor *sg_descriptor;
 
@@ -4882,36 +4918,10 @@ static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
 
 	sg = scsi_sglist(scmd);
 	sg_descriptor = request->sg_descriptors;
-	max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
-	chained = false;
-	num_sg_in_iu = 0;
-	i = 0;
 
-	while (1) {
-		pqi_set_sg_descriptor(sg_descriptor, sg);
-		if (!chained)
-			num_sg_in_iu++;
-		i++;
-		if (i == sg_count)
-			break;
-		sg_descriptor++;
-		if (i == max_sg_per_iu) {
-			put_unaligned_le64(
-				(u64)io_request->sg_chain_buffer_dma_handle,
-				&sg_descriptor->address);
-			put_unaligned_le32((sg_count - num_sg_in_iu)
-				* sizeof(*sg_descriptor),
-				&sg_descriptor->length);
-			put_unaligned_le32(CISS_SG_CHAIN,
-				&sg_descriptor->flags);
-			chained = true;
-			num_sg_in_iu++;
-			sg_descriptor = io_request->sg_chain_buffer;
-		}
-		sg = sg_next(sg);
-	}
+	num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
+		ctrl_info->max_sg_per_iu, &chained);
 
-	put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 	request->partial = chained;
 	iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
 
@@ -4925,12 +4935,10 @@ static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
 	struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
 	struct pqi_io_request *io_request)
 {
-	int i;
 	u16 iu_length;
 	int sg_count;
 	bool chained;
 	unsigned int num_sg_in_iu;
-	unsigned int max_sg_per_iu;
 	struct scatterlist *sg;
 	struct pqi_sg_descriptor *sg_descriptor;
 
@@ -4947,35 +4955,10 @@ static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
 
 	sg = scsi_sglist(scmd);
 	sg_descriptor = request->sg_descriptors;
-	max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
-	chained = false;
-	i = 0;
 
-	while (1) {
-		pqi_set_sg_descriptor(sg_descriptor, sg);
-		if (!chained)
-			num_sg_in_iu++;
-		i++;
-		if (i == sg_count)
-			break;
-		sg_descriptor++;
-		if (i == max_sg_per_iu) {
-			put_unaligned_le64(
-				(u64)io_request->sg_chain_buffer_dma_handle,
-				&sg_descriptor->address);
-			put_unaligned_le32((sg_count - num_sg_in_iu)
-				* sizeof(*sg_descriptor),
-				&sg_descriptor->length);
-			put_unaligned_le32(CISS_SG_CHAIN,
-				&sg_descriptor->flags);
-			chained = true;
-			num_sg_in_iu++;
-			sg_descriptor = io_request->sg_chain_buffer;
-		}
-		sg = sg_next(sg);
-	}
+	num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
+		ctrl_info->max_sg_per_iu, &chained);
 
-	put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 	request->partial = chained;
 	iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
 


  parent reply	other threads:[~2020-12-08 20:27 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-08 19:36 [PATCH V2 00/25] smartpqi updates Don Brace
2020-12-08 19:36 ` [PATCH V2 01/25] smartpqi: add support for product id Don Brace
2020-12-08 19:36 ` [PATCH V2 02/25] smartpqi: refactor aio submission code Don Brace
2020-12-08 19:36 ` Don Brace [this message]
2020-12-08 19:36 ` [PATCH V2 04/25] smartpqi: add support for raid5 and raid6 writes Don Brace
2020-12-08 19:37 ` [PATCH V2 05/25] smartpqi: add support for raid1 writes Don Brace
2020-12-08 19:37 ` [PATCH V2 06/25] smartpqi: add support for BMIC sense feature cmd and feature bits Don Brace
2020-12-08 19:37 ` [PATCH V2 07/25] smartpqi: update AIO Sub Page 0x02 support Don Brace
2020-12-08 19:37 ` [PATCH V2 08/25] smartpqi: add support for long firmware version Don Brace
2020-12-08 19:37 ` [PATCH V2 09/25] smartpqi: align code with oob driver Don Brace
2020-12-08 19:37 ` [PATCH V2 10/25] smartpqi: add stream detection Don Brace
2020-12-08 19:37 ` [PATCH V2 11/25] smartpqi: add host level stream detection enable Don Brace
2020-12-08 19:37 ` [PATCH V2 12/25] smartpqi: enable support for NVMe encryption Don Brace
2020-12-08 19:37 ` [PATCH V2 13/25] smartpqi: disable write_same for nvme hba disks Don Brace
2020-12-08 19:37 ` [PATCH V2 14/25] smartpqi: fix driver synchronization issues Don Brace
2020-12-08 19:38 ` [PATCH V2 15/25] smartpqi: fix host qdepth limit Don Brace
2020-12-08 19:38 ` [PATCH V2 16/25] smartpqi: convert snprintf to scnprintf Don Brace
2020-12-08 19:38 ` [PATCH V2 17/25] smartpqi: change timing of release of QRM memory during OFA Don Brace
2020-12-08 19:38 ` [PATCH V2 18/25] smartpqi: return busy indication for IOCTLs when ofa is active Don Brace
2020-12-08 19:38 ` [PATCH V2 19/25] smartpqi: add phy id support for the physical drives Don Brace
2020-12-08 19:38 ` [PATCH V2 20/25] smartpqi: update sas initiator_port_protocols and target_port_protocols Don Brace
2020-12-08 19:38 ` [PATCH V2 21/25] smartpqi: add additional logging for LUN resets Don Brace
2020-12-08 19:38 ` [PATCH V2 22/25] smartpqi: update enclosure identifier in sysf Don Brace
2020-12-08 19:38 ` [PATCH V2 23/25] smartpqi: correct system hangs when resuming from hibernation Don Brace
2020-12-08 19:38 ` [PATCH V2 24/25] smartpqi: add new pci ids Don Brace
2020-12-08 19:39 ` [PATCH V2 25/25] smartpqi: update version to 2.1.6-005 Don Brace

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