The patch titled
iommu sg merging: parisc: make iommu respect the segment size limits
has been added to the -mm tree. Its filename is
iommu-sg-merging-parisc-make-iommu-respect-the-segment-size-limits.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: iommu sg merging: parisc: make iommu respect the segment size limits
From: FUJITA Tomonori <[EMAIL PROTECTED]>
This patch makes iommu respect segment size limits when merging sg
lists.
Signed-off-by: FUJITA Tomonori <[EMAIL PROTECTED]>
Cc: Jeff Garzik <[EMAIL PROTECTED]>
Cc: James Bottomley <[EMAIL PROTECTED]>
Cc: Jens Axboe <[EMAIL PROTECTED]>
Cc: Kyle McMartin <[EMAIL PROTECTED]>
Cc: Grant Grundler <[EMAIL PROTECTED]>
Cc: Matthew Wilcox <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/parisc/ccio-dma.c | 2 +-
drivers/parisc/iommu-helpers.h | 7 ++++++-
drivers/parisc/sba_iommu.c | 2 +-
3 files changed, 8 insertions(+), 3 deletions(-)
diff -puN
drivers/parisc/ccio-dma.c~iommu-sg-merging-parisc-make-iommu-respect-the-segment-size-limits
drivers/parisc/ccio-dma.c
---
a/drivers/parisc/ccio-dma.c~iommu-sg-merging-parisc-make-iommu-respect-the-segment-size-limits
+++ a/drivers/parisc/ccio-dma.c
@@ -941,7 +941,7 @@ ccio_map_sg(struct device *dev, struct s
** w/o this association, we wouldn't have coherent DMA!
** Access to the virtual address is what forces a two pass algorithm.
*/
- coalesced = iommu_coalesce_chunks(ioc, sglist, nents, ccio_alloc_range);
+ coalesced = iommu_coalesce_chunks(ioc, dev, sglist, nents,
ccio_alloc_range);
/*
** Program the I/O Pdir
diff -puN
drivers/parisc/iommu-helpers.h~iommu-sg-merging-parisc-make-iommu-respect-the-segment-size-limits
drivers/parisc/iommu-helpers.h
---
a/drivers/parisc/iommu-helpers.h~iommu-sg-merging-parisc-make-iommu-respect-the-segment-size-limits
+++ a/drivers/parisc/iommu-helpers.h
@@ -95,12 +95,14 @@ iommu_fill_pdir(struct ioc *ioc, struct
*/
static inline unsigned int
-iommu_coalesce_chunks(struct ioc *ioc, struct scatterlist *startsg, int nents,
+iommu_coalesce_chunks(struct ioc *ioc, struct device *dev,
+ struct scatterlist *startsg, int nents,
int (*iommu_alloc_range)(struct ioc *, size_t))
{
struct scatterlist *contig_sg; /* contig chunk head */
unsigned long dma_offset, dma_len; /* start/len of DMA stream */
unsigned int n_mappings = 0;
+ unsigned int max_seg_size = dma_get_max_seg_size(dev);
while (nents > 0) {
@@ -142,6 +144,9 @@ iommu_coalesce_chunks(struct ioc *ioc, s
IOVP_SIZE) > DMA_CHUNK_SIZE))
break;
+ if (startsg->length + dma_len > max_seg_size)
+ break;
+
/*
** Next see if we can append the next chunk (i.e.
** it must end on one page and begin on another
diff -puN
drivers/parisc/sba_iommu.c~iommu-sg-merging-parisc-make-iommu-respect-the-segment-size-limits
drivers/parisc/sba_iommu.c
---
a/drivers/parisc/sba_iommu.c~iommu-sg-merging-parisc-make-iommu-respect-the-segment-size-limits
+++ a/drivers/parisc/sba_iommu.c
@@ -946,7 +946,7 @@ sba_map_sg(struct device *dev, struct sc
** w/o this association, we wouldn't have coherent DMA!
** Access to the virtual address is what forces a two pass algorithm.
*/
- coalesced = iommu_coalesce_chunks(ioc, sglist, nents, sba_alloc_range);
+ coalesced = iommu_coalesce_chunks(ioc, dev, sglist, nents,
sba_alloc_range);
/*
** Program the I/O Pdir
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
git-scsi-misc.patch
iommu-sg-merging-add-device_dma_parameters-structure.patch
iommu-sg-merging-pci-add-device_dma_parameters-support.patch
iommu-sg-merging-x86-make-pci-gart-iommu-respect-the-segment-size-limits.patch
iommu-sg-merging-ppc-make-iommu-respect-the-segment-size-limits.patch
iommu-sg-merging-ia64-make-sba_iommu-respect-the-segment-size-limits.patch
iommu-sg-merging-alpha-make-pci_iommu-respect-the-segment-size-limits.patch
iommu-sg-merging-sparc64-make-iommu-respect-the-segment-size-limits.patch
iommu-sg-merging-parisc-make-iommu-respect-the-segment-size-limits.patch
iommu-sg-merging-call-blk_queue_segment_boundary-in-__scsi_alloc_queue.patch
iommu-sg-merging-sata_inic162x-use-pci_set_dma_max_seg_size.patch
iommu-sg-merging-aacraid-use-pci_set_dma_max_seg_size.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
