From: Kashyap, Desai <kashyap.desai@lsi.com>
Date: Tue, 26 Apr 2011 06:39:46 +0000 (+0530)
Subject: [SCSI] mptfusion: Adding inline data padding support for TAPE drive.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=19fff154e7ee35d1297eb27d7d41e6f8742101ec;p=linux-beck.git

[SCSI] mptfusion: Adding inline data padding support for TAPE drive.

Adding support for inline data padding for TAPE drive when running U320.

[jejb: whitespace fixes]
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
---

diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c
index 6d9568d2ec59..8f61ba6aac23 100644
--- a/drivers/message/fusion/mptspi.c
+++ b/drivers/message/fusion/mptspi.c
@@ -867,6 +867,10 @@ static int mptspi_write_spi_device_pg1(struct scsi_target *starget,
 	struct _x_config_parms cfg;
 	struct _CONFIG_PAGE_HEADER hdr;
 	int err = -EBUSY;
+	u32 nego_parms;
+	u32 period;
+	struct scsi_device *sdev;
+	int i;
 
 	/* don't allow updating nego parameters on RAID devices */
 	if (starget->channel == 0 &&
@@ -904,6 +908,24 @@ static int mptspi_write_spi_device_pg1(struct scsi_target *starget,
 	pg1->Header.PageNumber = hdr.PageNumber;
 	pg1->Header.PageType = hdr.PageType;
 
+	nego_parms = le32_to_cpu(pg1->RequestedParameters);
+	period = (nego_parms & MPI_SCSIDEVPAGE1_RP_MIN_SYNC_PERIOD_MASK) >>
+		MPI_SCSIDEVPAGE1_RP_SHIFT_MIN_SYNC_PERIOD;
+	if (period == 8) {
+		/* Turn on inline data padding for TAPE when running U320 */
+		for (i = 0 ; i < 16; i++) {
+			sdev = scsi_device_lookup_by_target(starget, i);
+			if (sdev && sdev->type == TYPE_TAPE) {
+				sdev_printk(KERN_DEBUG, sdev, MYIOC_s_FMT
+					    "IDP:ON\n", ioc->name);
+				nego_parms |= MPI_SCSIDEVPAGE1_RP_IDP;
+				pg1->RequestedParameters =
+				    cpu_to_le32(nego_parms);
+				break;
+			}
+		}
+	}
+
 	mptspi_print_write_nego(hd, starget, le32_to_cpu(pg1->RequestedParameters));
 
 	if (mpt_config(ioc, &cfg)) {