Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d22a6966b8029913fac37d078ab2403898d94c63
Commit: d22a6966b8029913fac37d078ab2403898d94c63
Parent: 67ec11cf968241c9ae907f8817b6ac74d4dd71d7
Author: FUJITA Tomonori <[EMAIL PROTECTED]>
AuthorDate: Mon Feb 4 22:28:13 2008 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Feb 5 09:44:11 2008 -0800
iommu sg merging: add accessors for segment_boundary_mask in
device_dma_parameters()
This adds new accessors for segment_boundary_mask in device_dma_parameters
structure in the same way I did for max_segment_size. So we can easily
change
where to place struct device_dma_parameters in the future.
dma_get_segment boundary returns 0xffffffff if dma_parms in struct device
isn't set up properly. 0xffffffff is the default value used in the block
layer and the scsi mid layer.
Signed-off-by: FUJITA Tomonori <[EMAIL PROTECTED]>
Cc: James Bottomley <[EMAIL PROTECTED]>
Cc: Jens Axboe <[EMAIL PROTECTED]>
Cc: Greg KH <[EMAIL PROTECTED]>
Cc: Jeff Garzik <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
include/linux/dma-mapping.h | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index df3a361..3320307 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -75,6 +75,21 @@ static inline unsigned int dma_set_max_seg_size(struct
device *dev,
return -EIO;
}
+static inline unsigned long dma_get_seg_boundary(struct device *dev)
+{
+ return dev->dma_parms ?
+ dev->dma_parms->segment_boundary_mask : 0xffffffff;
+}
+
+static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
+{
+ if (dev->dma_parms) {
+ dev->dma_parms->segment_boundary_mask = mask;
+ return 0;
+ } else
+ return -EIO;
+}
+
/* flags for the coherent memory api */
#define DMA_MEMORY_MAP 0x01
#define DMA_MEMORY_IO 0x02
-
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