xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Atdalīts 0
Kods Problēmas Izmaiņu pieprasījumi Darbības Pakotnes Projekti Laidieni Vikivietne Aktivitāte

dma-mapping: use unsigned long for dma_attrs

Pārlūkot izejas kodu 
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>
Šī revīzija ir iekļauta:
Krzysztof Kozlowski
2016-08-03 13:46:00 -07:00
revīziju iesūtīja Linus Torvalds
vecāks 1605d2715a
revīzija 00085f1efa
111 mainīti faili ar 705 papildinājumiem un 804 dzēšanām
Lejupielādēt ielāpa failu Lejupielādēt izmaiņu failu Izvērst visus failus Savērst visus failus

16
drivers/parisc/ccio-dma.c
Parādīt failu

@@ -790,7 +790,7 @@ ccio_map_single(struct device *dev, void *addr, size_t size,
static dma_addr_t
ccio_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)
{
return ccio_map_single(dev, page_address(page) + offset, size,
direction);
@@ -806,7 +806,7 @@ ccio_map_page(struct device *dev, struct page *page, unsigned long offset,
*/
static void
ccio_unmap_page(struct device *dev, dma_addr_t iova, size_t size,
enum dma_data_direction direction, struct dma_attrs *attrs)
enum dma_data_direction direction, unsigned long attrs)
{
struct ioc *ioc;
unsigned long flags;
@@ -844,7 +844,7 @@ ccio_unmap_page(struct device *dev, dma_addr_t iova, size_t size,
*/
static void *
ccio_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag,
struct dma_attrs *attrs)
unsigned long attrs)
{
void *ret;
#if 0
@@ -878,9 +878,9 @@ ccio_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag,
*/
static void
ccio_free(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_handle, struct dma_attrs *attrs)
dma_addr_t dma_handle, unsigned long attrs)
{
ccio_unmap_page(dev, dma_handle, size, 0, NULL);
ccio_unmap_page(dev, dma_handle, size, 0, 0);
free_pages((unsigned long)cpu_addr, get_order(size));
}
@@ -907,7 +907,7 @@ ccio_free(struct device *dev, size_t size, void *cpu_addr,
*/
static int
ccio_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
enum dma_data_direction direction, struct dma_attrs *attrs)
enum dma_data_direction direction, unsigned long attrs)
{
struct ioc *ioc;
int coalesced, filled = 0;
@@ -984,7 +984,7 @@ ccio_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
*/
static void
ccio_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
enum dma_data_direction direction, struct dma_attrs *attrs)
enum dma_data_direction direction, unsigned long attrs)
{
struct ioc *ioc;
@@ -1004,7 +1004,7 @@ ccio_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
ioc->usg_pages += sg_dma_len(sglist) >> PAGE_SHIFT;
#endif
ccio_unmap_page(dev, sg_dma_address(sglist),
sg_dma_len(sglist), direction, NULL);
sg_dma_len(sglist), direction, 0);
++sglist;
}

16
drivers/parisc/sba_iommu.c
Parādīt failu

@@ -783,7 +783,7 @@ sba_map_single(struct device *dev, void *addr, size_t size,
static dma_addr_t
sba_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)
{
return sba_map_single(dev, page_address(page) + offset, size,
direction);
@@ -801,7 +801,7 @@ sba_map_page(struct device *dev, struct page *page, unsigned long offset,
*/
static void
sba_unmap_page(struct device *dev, dma_addr_t iova, size_t size,
enum dma_data_direction direction, struct dma_attrs *attrs)
enum dma_data_direction direction, unsigned long attrs)
{
struct ioc *ioc;
#if DELAYED_RESOURCE_CNT > 0
@@ -876,7 +876,7 @@ sba_unmap_page(struct device *dev, dma_addr_t iova, size_t size,
* See Documentation/DMA-API-HOWTO.txt
*/
static void *sba_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle,
gfp_t gfp, struct dma_attrs *attrs)
gfp_t gfp, unsigned long attrs)
{
void *ret;
@@ -908,9 +908,9 @@ static void *sba_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle
*/
static void
sba_free(struct device *hwdev, size_t size, void *vaddr,
dma_addr_t dma_handle, struct dma_attrs *attrs)
dma_addr_t dma_handle, unsigned long attrs)
{
sba_unmap_page(hwdev, dma_handle, size, 0, NULL);
sba_unmap_page(hwdev, dma_handle, size, 0, 0);
free_pages((unsigned long) vaddr, get_order(size));
}
@@ -943,7 +943,7 @@ int dump_run_sg = 0;
*/
static int
sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
enum dma_data_direction direction, struct dma_attrs *attrs)
enum dma_data_direction direction, unsigned long attrs)
{
struct ioc *ioc;
int coalesced, filled = 0;
@@ -1026,7 +1026,7 @@ sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
*/
static void
sba_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
enum dma_data_direction direction, struct dma_attrs *attrs)
enum dma_data_direction direction, unsigned long attrs)
{
struct ioc *ioc;
#ifdef ASSERT_PDIR_SANITY
@@ -1051,7 +1051,7 @@ sba_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
while (sg_dma_len(sglist) && nents--) {
sba_unmap_page(dev, sg_dma_address(sglist), sg_dma_len(sglist),
direction, NULL);
direction, 0);
#ifdef SBA_COLLECT_STATS
ioc->usg_pages += ((sg_dma_address(sglist) & ~IOVP_MASK) + sg_dma_len(sglist) + IOVP_SIZE - 1) >> PAGE_SHIFT;
ioc->usingle_calls--; /* kluge since call is unmap_sg() */