diff options
author | Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2016-08-03 13:46:00 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-04 08:50:07 -0400 |
commit | 00085f1efa387a8ce100e3734920f7639c80caa3 (patch) | |
tree | 41ff3d6e6884918b4fc4f1ae96a284098167c5b0 /drivers/gpu/drm/exynos/exynos_drm_gem.c | |
parent | 1605d2715ad2e67ddd0485a26e05ed670a4285ca (diff) |
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 'drivers/gpu/drm/exynos/exynos_drm_gem.c')
-rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_gem.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c index cdf9f1af4347..f2ae72ba7d5a 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -24,7 +24,7 @@ static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem) { struct drm_device *dev = exynos_gem->base.dev; - enum dma_attr attr; + unsigned long attr; unsigned int nr_pages; struct sg_table sgt; int ret = -ENOMEM; @@ -34,7 +34,7 @@ static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem) return 0; } - init_dma_attrs(&exynos_gem->dma_attrs); + exynos_gem->dma_attrs = 0; /* * if EXYNOS_BO_CONTIG, fully physically contiguous memory @@ -42,7 +42,7 @@ static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem) * as possible. */ if (!(exynos_gem->flags & EXYNOS_BO_NONCONTIG)) - dma_set_attr(DMA_ATTR_FORCE_CONTIGUOUS, &exynos_gem->dma_attrs); + exynos_gem->dma_attrs |= DMA_ATTR_FORCE_CONTIGUOUS; /* * if EXYNOS_BO_WC or EXYNOS_BO_NONCACHABLE, writecombine mapping @@ -54,8 +54,8 @@ static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem) else attr = DMA_ATTR_NON_CONSISTENT; - dma_set_attr(attr, &exynos_gem->dma_attrs); - dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &exynos_gem->dma_attrs); + exynos_gem->dma_attrs |= attr; + exynos_gem->dma_attrs |= DMA_ATTR_NO_KERNEL_MAPPING; nr_pages = exynos_gem->size >> PAGE_SHIFT; @@ -67,7 +67,7 @@ static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem) exynos_gem->cookie = dma_alloc_attrs(to_dma_dev(dev), exynos_gem->size, &exynos_gem->dma_addr, GFP_KERNEL, - &exynos_gem->dma_attrs); + exynos_gem->dma_attrs); if (!exynos_gem->cookie) { DRM_ERROR("failed to allocate buffer.\n"); goto err_free; @@ -75,7 +75,7 @@ static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem) ret = dma_get_sgtable_attrs(to_dma_dev(dev), &sgt, exynos_gem->cookie, exynos_gem->dma_addr, exynos_gem->size, - &exynos_gem->dma_attrs); + exynos_gem->dma_attrs); if (ret < 0) { DRM_ERROR("failed to get sgtable.\n"); goto err_dma_free; @@ -99,7 +99,7 @@ err_sgt_free: sg_free_table(&sgt); err_dma_free: dma_free_attrs(to_dma_dev(dev), exynos_gem->size, exynos_gem->cookie, - exynos_gem->dma_addr, &exynos_gem->dma_attrs); + exynos_gem->dma_addr, exynos_gem->dma_attrs); err_free: drm_free_large(exynos_gem->pages); @@ -120,7 +120,7 @@ static void exynos_drm_free_buf(struct exynos_drm_gem *exynos_gem) dma_free_attrs(to_dma_dev(dev), exynos_gem->size, exynos_gem->cookie, (dma_addr_t)exynos_gem->dma_addr, - &exynos_gem->dma_attrs); + exynos_gem->dma_attrs); drm_free_large(exynos_gem->pages); } @@ -346,7 +346,7 @@ static int exynos_drm_gem_mmap_buffer(struct exynos_drm_gem *exynos_gem, ret = dma_mmap_attrs(to_dma_dev(drm_dev), vma, exynos_gem->cookie, exynos_gem->dma_addr, exynos_gem->size, - &exynos_gem->dma_attrs); + exynos_gem->dma_attrs); if (ret < 0) { DRM_ERROR("failed to mmap.\n"); return ret; |