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authorKrzysztof Kozlowski <k.kozlowski@samsung.com>2016-08-03 23:46:00 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-08-04 15:50:07 +0300
commit00085f1efa387a8ce100e3734920f7639c80caa3 (patch)
tree41ff3d6e6884918b4fc4f1ae96a284098167c5b0 /arch/mips
parent1605d2715ad2e67ddd0485a26e05ed670a4285ca (diff)
downloadlinux-00085f1efa387a8ce100e3734920f7639c80caa3.tar.xz
dma-mapping: use unsigned long for dma_attrs
The dma-mapping core and the implementations do not change the DMA attributes passed by pointer. Thus the pointer can point to const data. However the attributes do not have to be a bitfield. Instead unsigned long will do fine: 1. This is just simpler. Both in terms of reading the code and setting attributes. Instead of initializing local attributes on the stack and passing pointer to it to dma_set_attr(), just set the bits. 2. It brings safeness and checking for const correctness because the attributes are passed by value. Semantic patches for this change (at least most of them): virtual patch virtual context @r@ identifier f, attrs; @@ f(..., - struct dma_attrs *attrs + unsigned long attrs , ...) { ... } @@ identifier r.f; @@ f(..., - NULL + 0 ) and // Options: --all-includes virtual patch virtual context @r@ identifier f, attrs; type t; @@ t f(..., struct dma_attrs *attrs); @@ identifier r.f; @@ f(..., - NULL + 0 ) Link: http://lkml.kernel.org/r/1468399300-5399-2-git-send-email-k.kozlowski@samsung.com Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Robin Murphy <robin.murphy@arm.com> Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> Acked-by: Mark Salter <msalter@redhat.com> [c6x] Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> [cris] Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> [drm] Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Acked-by: Joerg Roedel <jroedel@suse.de> [iommu] Acked-by: Fabien Dessenne <fabien.dessenne@st.com> [bdisp] Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> [vb2-core] Acked-by: David Vrabel <david.vrabel@citrix.com> [xen] Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> [xen swiotlb] Acked-by: Joerg Roedel <jroedel@suse.de> [iommu] Acked-by: Richard Kuo <rkuo@codeaurora.org> [hexagon] Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> [s390] Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> [avr32] Acked-by: Vineet Gupta <vgupta@synopsys.com> [arc] Acked-by: Robin Murphy <robin.murphy@arm.com> [arm64 and dma-iommu] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/cavium-octeon/dma-octeon.c8
-rw-r--r--arch/mips/loongson64/common/dma-swiotlb.c10
-rw-r--r--arch/mips/mm/dma-default.c20
-rw-r--r--arch/mips/netlogic/common/nlm-dma.c4
4 files changed, 21 insertions, 21 deletions
diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c
index 2cd45f5f9481..fd69528b24fb 100644
--- a/arch/mips/cavium-octeon/dma-octeon.c
+++ b/arch/mips/cavium-octeon/dma-octeon.c
@@ -125,7 +125,7 @@ static phys_addr_t octeon_small_dma_to_phys(struct device *dev,
static dma_addr_t octeon_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction direction,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
dma_addr_t daddr = swiotlb_map_page(dev, page, offset, size,
direction, attrs);
@@ -135,7 +135,7 @@ static dma_addr_t octeon_dma_map_page(struct device *dev, struct page *page,
}
static int octeon_dma_map_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
+ int nents, enum dma_data_direction direction, unsigned long attrs)
{
int r = swiotlb_map_sg_attrs(dev, sg, nents, direction, attrs);
mb();
@@ -157,7 +157,7 @@ static void octeon_dma_sync_sg_for_device(struct device *dev,
}
static void *octeon_dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp, struct dma_attrs *attrs)
+ dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
void *ret;
@@ -189,7 +189,7 @@ static void *octeon_dma_alloc_coherent(struct device *dev, size_t size,
}
static void octeon_dma_free_coherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle, struct dma_attrs *attrs)
+ void *vaddr, dma_addr_t dma_handle, unsigned long attrs)
{
swiotlb_free_coherent(dev, size, vaddr, dma_handle);
}
diff --git a/arch/mips/loongson64/common/dma-swiotlb.c b/arch/mips/loongson64/common/dma-swiotlb.c
index 4ffa6fc81c8f..1a80b6f73ab2 100644
--- a/arch/mips/loongson64/common/dma-swiotlb.c
+++ b/arch/mips/loongson64/common/dma-swiotlb.c
@@ -10,7 +10,7 @@
#include <dma-coherence.h>
static void *loongson_dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp, struct dma_attrs *attrs)
+ dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
void *ret;
@@ -41,7 +41,7 @@ static void *loongson_dma_alloc_coherent(struct device *dev, size_t size,
}
static void loongson_dma_free_coherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle, struct dma_attrs *attrs)
+ void *vaddr, dma_addr_t dma_handle, unsigned long attrs)
{
swiotlb_free_coherent(dev, size, vaddr, dma_handle);
}
@@ -49,7 +49,7 @@ static void loongson_dma_free_coherent(struct device *dev, size_t size,
static dma_addr_t loongson_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
dma_addr_t daddr = swiotlb_map_page(dev, page, offset, size,
dir, attrs);
@@ -59,9 +59,9 @@ static dma_addr_t loongson_dma_map_page(struct device *dev, struct page *page,
static int loongson_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
- int r = swiotlb_map_sg_attrs(dev, sg, nents, dir, NULL);
+ int r = swiotlb_map_sg_attrs(dev, sg, nents, dir, 0);
mb();
return r;
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index cb557d28cb21..b2eadd6fa9a1 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -131,7 +131,7 @@ static void *mips_dma_alloc_noncoherent(struct device *dev, size_t size,
}
static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t * dma_handle, gfp_t gfp, struct dma_attrs *attrs)
+ dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
void *ret;
struct page *page = NULL;
@@ -141,7 +141,7 @@ static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
* XXX: seems like the coherent and non-coherent implementations could
* be consolidated.
*/
- if (dma_get_attr(DMA_ATTR_NON_CONSISTENT, attrs))
+ if (attrs & DMA_ATTR_NON_CONSISTENT)
return mips_dma_alloc_noncoherent(dev, size, dma_handle, gfp);
gfp = massage_gfp_flags(dev, gfp);
@@ -176,13 +176,13 @@ static void mips_dma_free_noncoherent(struct device *dev, size_t size,
}
static void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle, struct dma_attrs *attrs)
+ dma_addr_t dma_handle, unsigned long attrs)
{
unsigned long addr = (unsigned long) vaddr;
unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
struct page *page = NULL;
- if (dma_get_attr(DMA_ATTR_NON_CONSISTENT, attrs)) {
+ if (attrs & DMA_ATTR_NON_CONSISTENT) {
mips_dma_free_noncoherent(dev, size, vaddr, dma_handle);
return;
}
@@ -200,7 +200,7 @@ static void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
static int mips_dma_mmap(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
unsigned long user_count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT;
@@ -214,7 +214,7 @@ static int mips_dma_mmap(struct device *dev, struct vm_area_struct *vma,
pfn = page_to_pfn(virt_to_page((void *)addr));
- if (dma_get_attr(DMA_ATTR_WRITE_COMBINE, attrs))
+ if (attrs & DMA_ATTR_WRITE_COMBINE)
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
else
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
@@ -291,7 +291,7 @@ static inline void __dma_sync(struct page *page,
}
static void mips_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
- size_t size, enum dma_data_direction direction, struct dma_attrs *attrs)
+ size_t size, enum dma_data_direction direction, unsigned long attrs)
{
if (cpu_needs_post_dma_flush(dev))
__dma_sync(dma_addr_to_page(dev, dma_addr),
@@ -301,7 +301,7 @@ static void mips_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
}
static int mips_dma_map_sg(struct device *dev, struct scatterlist *sglist,
- int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
+ int nents, enum dma_data_direction direction, unsigned long attrs)
{
int i;
struct scatterlist *sg;
@@ -322,7 +322,7 @@ static int mips_dma_map_sg(struct device *dev, struct scatterlist *sglist,
static dma_addr_t mips_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction direction,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
if (!plat_device_is_coherent(dev))
__dma_sync(page, offset, size, direction);
@@ -332,7 +332,7 @@ static dma_addr_t mips_dma_map_page(struct device *dev, struct page *page,
static void mips_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
int nhwentries, enum dma_data_direction direction,
- struct dma_attrs *attrs)
+ unsigned long attrs)
{
int i;
struct scatterlist *sg;
diff --git a/arch/mips/netlogic/common/nlm-dma.c b/arch/mips/netlogic/common/nlm-dma.c
index 3758715d4ab6..0630693bec2a 100644
--- a/arch/mips/netlogic/common/nlm-dma.c
+++ b/arch/mips/netlogic/common/nlm-dma.c
@@ -45,7 +45,7 @@
static char *nlm_swiotlb;
static void *nlm_dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp, struct dma_attrs *attrs)
+ dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
/* ignore region specifiers */
gfp &= ~(__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM);
@@ -62,7 +62,7 @@ static void *nlm_dma_alloc_coherent(struct device *dev, size_t size,
}
static void nlm_dma_free_coherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle, struct dma_attrs *attrs)
+ void *vaddr, dma_addr_t dma_handle, unsigned long attrs)
{
swiotlb_free_coherent(dev, size, vaddr, dma_handle);
}