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scatterlist: use sg_phys() 

Coccinelle cleanup to replace open coded sg to physical address
translations.  This is in preparation for introducing scatterlists that
reference __pfn_t.

// sg_phys.cocci: convert usage page_to_phys(sg_page(sg)) to sg_phys(sg)
// usage: make coccicheck COCCI=sg_phys.cocci MODE=patch

virtual patch

@@
struct scatterlist *sg;
@@

- page_to_phys(sg_page(sg)) + sg->offset
+ sg_phys(sg)

@@
struct scatterlist *sg;
@@

- page_to_phys(sg_page(sg))
+ sg_phys(sg) & PAGE_MASK

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Dan Williams 2015-08-17 08:13:26 -06:00 committed by Jens Axboe
parent 89e2a8404e
commit db0fa0cb01
5 changed files with 7 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/mm/dma-mapping.c
View File

@ -1520,7 +1520,7 @@ static int __map_sg_chunk(struct device *dev, struct scatterlist *sg,
return -ENOMEM;
for (count = 0, s = sg; count < (size >> PAGE_SHIFT); s = sg_next(s)) {
phys_addr_t phys = page_to_phys(sg_page(s));
phys_addr_t phys = sg_phys(s) & PAGE_MASK;
unsigned int len = PAGE_ALIGN(s->offset + s->length);
if (!is_coherent &&

3
arch/microblaze/kernel/dma.c
View File

@ -61,8 +61,7 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl,
/* FIXME this part of code is untested */
for_each_sg(sgl, sg, nents, i) {
sg->dma_address = sg_phys(sg);
__dma_sync(page_to_phys(sg_page(sg)) + sg->offset,
sg->length, direction);
__dma_sync(sg_phys(sg), sg->length, direction);
}
return nents;

4
drivers/iommu/intel-iommu.c
View File

@ -2094,7 +2094,7 @@ static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn,
sg_res = aligned_nrpages(sg->offset, sg->length);
sg->dma_address = ((dma_addr_t)iov_pfn << VTD_PAGE_SHIFT) + sg->offset;
sg->dma_length = sg->length;
pteval = page_to_phys(sg_page(sg)) | prot;
pteval = (sg_phys(sg) & PAGE_MASK) | prot;
phys_pfn = pteval >> VTD_PAGE_SHIFT;
}
@ -3620,7 +3620,7 @@ static int intel_nontranslate_map_sg(struct device *hddev,
for_each_sg(sglist, sg, nelems, i) {
BUG_ON(!sg_page(sg));
sg->dma_address = page_to_phys(sg_page(sg)) + sg->offset;
sg->dma_address = sg_phys(sg);
sg->dma_length = sg->length;
}
return nelems;

2
drivers/iommu/iommu.c
View File

@ -1408,7 +1408,7 @@ size_t default_iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
min_pagesz = 1 << __ffs(domain->ops->pgsize_bitmap);
for_each_sg(sg, s, nents, i) {
phys_addr_t phys = page_to_phys(sg_page(s)) + s->offset;
phys_addr_t phys = sg_phys(s);
/*
* We are mapping on IOMMU page boundaries, so offset within

4
drivers/staging/android/ion/ion_chunk_heap.c
View File

@ -81,7 +81,7 @@ static int ion_chunk_heap_allocate(struct ion_heap *heap,
err:
sg = table->sgl;
for (i -= 1; i >= 0; i--) {
gen_pool_free(chunk_heap->pool, page_to_phys(sg_page(sg)),
gen_pool_free(chunk_heap->pool, sg_phys(sg) & PAGE_MASK,
sg->length);
sg = sg_next(sg);
}
@ -109,7 +109,7 @@ static void ion_chunk_heap_free(struct ion_buffer *buffer)
DMA_BIDIRECTIONAL);
for_each_sg(table->sgl, sg, table->nents, i) {
gen_pool_free(chunk_heap->pool, page_to_phys(sg_page(sg)),
gen_pool_free(chunk_heap->pool, sg_phys(sg) & PAGE_MASK,
sg->length);
}
chunk_heap->allocated -= allocated_size;