From: Steven Matthews <steven.matthews@xxxxxxxxxx>
Replace use of standard Linux dma_data_direction with a Unisys-
specific uis_dma_data_direction and provide a function to convert
from the latter to the former. This is necessary because Unisys
s-Par depends on the exact format of this field in multiple OSs
and languages, and so using the standard version creates an
unnecessary dependency between the kernel and s-Par.
Signed-off-by: Steven Matthews <steven.matthews@xxxxxxxxxx>
Signed-off-by: David Kershner <david.kershner@xxxxxxxxxx>
Reviewed-by: Tim Sell <timothy.sell@xxxxxxxxxx>
---
drivers/staging/unisys/include/iochannel.h | 15 ++++++++--
drivers/staging/unisys/visorhba/visorhba_main.c | 26 +++++++++++++++++-
2 files changed, 37 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/unisys/include/iochannel.h b/drivers/staging/unisys/include/iochannel.h
index 40eb7d5..a52e1ce 100644
--- a/drivers/staging/unisys/include/iochannel.h
+++ b/drivers/staging/unisys/include/iochannel.h
@@ -28,7 +28,7 @@
*/
#include <linux/uuid.h>
-#include <linux/dma-direction.h>
+
#include "channel.h"
/*
@@ -60,6 +60,15 @@
/* Size of cdb - i.e., SCSI cmnd */
#define MAX_CMND_SIZE 16
+
+/* Unisys-specific DMA direction values */
+enum uis_dma_data_direction {
+ UIS_DMA_BIDIRECTIONAL = 0,
+ UIS_DMA_TO_DEVICE = 1,
+ UIS_DMA_FROM_DEVICE = 2,
+ UIS_DMA_NONE = 3
+};
+
#define MAX_SENSE_SIZE 64
#define MAX_PHYS_INFO 64
@@ -182,7 +191,7 @@ struct vhba_config_max {
* @bufflen: Length of data to be transferred out or in.
* @guest_phys_entries: Number of entries in scatter-gather list.
* @struct gpi_list: Physical address information for each fragment.
- * @enum data_dir: Direction of the data, if any.
+ * @data_dir: Direction of the data, if any.
* @struct vdest: Identifies the virtual hba, id, channel, lun to which
* cmd was sent.
* @linuxstat: Original Linux status used by Linux vdisk.
@@ -205,7 +214,7 @@ struct uiscmdrsp_scsi {
u32 bufflen;
u16 guest_phys_entries;
struct guest_phys_info gpi_list[MAX_PHYS_INFO];
- enum dma_data_direction data_dir;
+ u32 data_dir;
struct uisscsi_dest vdest;
/* Needed to queue the rsp back to cmd originator. */
int linuxstat;
diff --git a/drivers/staging/unisys/visorhba/visorhba_main.c b/drivers/staging/unisys/visorhba/visorhba_main.c
index 178d022..0eaefbd 100644
--- a/drivers/staging/unisys/visorhba/visorhba_main.c
+++ b/drivers/staging/unisys/visorhba/visorhba_main.c
@@ -478,6 +478,29 @@ static const char *visorhba_get_info(struct Scsi_Host *shp)
}
/*
+ * dma_data_dir_linux_to_spar - convert dma_data_direction value to
+ * Unisys-specific equivalent
+ * @d: dma direction value to convert
+ *
+ * Returns the Unisys-specific dma direction value corresponding to @d
+ */
+static u32 dma_data_dir_linux_to_spar(enum dma_data_direction d)
+{
+ switch (d) {
+ case DMA_BIDIRECTIONAL:
+ return UIS_DMA_BIDIRECTIONAL;
+ case DMA_TO_DEVICE:
+ return UIS_DMA_TO_DEVICE;
+ case DMA_FROM_DEVICE:
+ return UIS_DMA_FROM_DEVICE;
+ case DMA_NONE:
+ return UIS_DMA_NONE;
+ default:
+ return UIS_DMA_NONE;
+ }
+}
+
+/*
* visorhba_queue_command_lck - Queues command to the Service Partition
* @scsicmd: Command to be queued
* @vsiorhba_cmnd_done: Done command to call when scsicmd is returned
@@ -525,7 +548,8 @@ static int visorhba_queue_command_lck(struct scsi_cmnd *scsicmd,
cmdrsp->scsi.vdest.id = scsidev->id;
cmdrsp->scsi.vdest.lun = scsidev->lun;
/* save datadir */
- cmdrsp->scsi.data_dir = scsicmd->sc_data_direction;
+ cmdrsp->scsi.data_dir =
+ dma_data_dir_linux_to_spar(scsicmd->sc_data_direction);
memcpy(cmdrsp->scsi.cmnd, cdb, MAX_CMND_SIZE);
cmdrsp->scsi.bufflen = scsi_bufflen(scsicmd);
--
git-series 0.9.1
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