mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-09-04 20:19:47 +08:00
00085f1efa
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>
56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
/*
|
|
* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
|
|
* Author:Mark Yao <mark.yao@rock-chips.com>
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef _ROCKCHIP_DRM_GEM_H
|
|
#define _ROCKCHIP_DRM_GEM_H
|
|
|
|
#define to_rockchip_obj(x) container_of(x, struct rockchip_gem_object, base)
|
|
|
|
struct rockchip_gem_object {
|
|
struct drm_gem_object base;
|
|
unsigned int flags;
|
|
|
|
void *kvaddr;
|
|
dma_addr_t dma_addr;
|
|
unsigned long dma_attrs;
|
|
};
|
|
|
|
struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj);
|
|
struct drm_gem_object *
|
|
rockchip_gem_prime_import_sg_table(struct drm_device *dev, size_t size,
|
|
struct sg_table *sgt);
|
|
void *rockchip_gem_prime_vmap(struct drm_gem_object *obj);
|
|
void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
|
|
|
|
/* drm driver mmap file operations */
|
|
int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma);
|
|
|
|
/* mmap a gem object to userspace. */
|
|
int rockchip_gem_mmap_buf(struct drm_gem_object *obj,
|
|
struct vm_area_struct *vma);
|
|
|
|
struct rockchip_gem_object *
|
|
rockchip_gem_create_object(struct drm_device *drm, unsigned int size,
|
|
bool alloc_kmap);
|
|
|
|
void rockchip_gem_free_object(struct drm_gem_object *obj);
|
|
|
|
int rockchip_gem_dumb_create(struct drm_file *file_priv,
|
|
struct drm_device *dev,
|
|
struct drm_mode_create_dumb *args);
|
|
int rockchip_gem_dumb_map_offset(struct drm_file *file_priv,
|
|
struct drm_device *dev, uint32_t handle,
|
|
uint64_t *offset);
|
|
#endif /* _ROCKCHIP_DRM_GEM_H */
|