mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 13:37:49 +07:00
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>
60 lines
2.0 KiB
C
60 lines
2.0 KiB
C
/*
|
|
* Copyright (c) 2015 MediaTek Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* 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 _MTK_DRM_GEM_H_
|
|
#define _MTK_DRM_GEM_H_
|
|
|
|
#include <drm/drm_gem.h>
|
|
|
|
/*
|
|
* mtk drm buffer structure.
|
|
*
|
|
* @base: a gem object.
|
|
* - a new handle to this gem object would be created
|
|
* by drm_gem_handle_create().
|
|
* @cookie: the return value of dma_alloc_attrs(), keep it for dma_free_attrs()
|
|
* @kvaddr: kernel virtual address of gem buffer.
|
|
* @dma_addr: dma address of gem buffer.
|
|
* @dma_attrs: dma attributes of gem buffer.
|
|
*
|
|
* P.S. this object would be transferred to user as kms_bo.handle so
|
|
* user can access the buffer through kms_bo.handle.
|
|
*/
|
|
struct mtk_drm_gem_obj {
|
|
struct drm_gem_object base;
|
|
void *cookie;
|
|
void *kvaddr;
|
|
dma_addr_t dma_addr;
|
|
unsigned long dma_attrs;
|
|
struct sg_table *sg;
|
|
};
|
|
|
|
#define to_mtk_gem_obj(x) container_of(x, struct mtk_drm_gem_obj, base)
|
|
|
|
void mtk_drm_gem_free_object(struct drm_gem_object *gem);
|
|
struct mtk_drm_gem_obj *mtk_drm_gem_create(struct drm_device *dev, size_t size,
|
|
bool alloc_kmap);
|
|
int mtk_drm_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
|
|
struct drm_mode_create_dumb *args);
|
|
int mtk_drm_gem_dumb_map_offset(struct drm_file *file_priv,
|
|
struct drm_device *dev, uint32_t handle,
|
|
uint64_t *offset);
|
|
int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
|
|
int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj,
|
|
struct vm_area_struct *vma);
|
|
struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);
|
|
struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
|
|
struct dma_buf_attachment *attach, struct sg_table *sg);
|
|
|
|
#endif
|