62a0d98a18
Some SoC without MMU have display driver where a drm/kms driver could be implemented. Before doing such kind of thing drm/kms must allow to use mmuless devices. This patch propose to remove MMU configuration flag and add a cma helper function to help implementing mmuless display driver version 4: - add documentation about drm_gem_cma_get_unmapped_area() - stub it MMU case Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> [danvet: Use recommended struct member references in kernel-doc.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1483521177-21794-4-git-send-email-benjamin.gaignard@linaro.org
88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
#ifndef __DRM_GEM_CMA_HELPER_H__
|
|
#define __DRM_GEM_CMA_HELPER_H__
|
|
|
|
#include <drm/drmP.h>
|
|
#include <drm/drm_gem.h>
|
|
|
|
/**
|
|
* struct drm_gem_cma_object - GEM object backed by CMA memory allocations
|
|
* @base: base GEM object
|
|
* @paddr: physical address of the backing memory
|
|
* @sgt: scatter/gather table for imported PRIME buffers
|
|
* @vaddr: kernel virtual address of the backing memory
|
|
*/
|
|
struct drm_gem_cma_object {
|
|
struct drm_gem_object base;
|
|
dma_addr_t paddr;
|
|
struct sg_table *sgt;
|
|
|
|
/* For objects with DMA memory allocated by GEM CMA */
|
|
void *vaddr;
|
|
};
|
|
|
|
static inline struct drm_gem_cma_object *
|
|
to_drm_gem_cma_obj(struct drm_gem_object *gem_obj)
|
|
{
|
|
return container_of(gem_obj, struct drm_gem_cma_object, base);
|
|
}
|
|
|
|
/* free GEM object */
|
|
void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
|
|
|
|
/* create memory region for DRM framebuffer */
|
|
int drm_gem_cma_dumb_create_internal(struct drm_file *file_priv,
|
|
struct drm_device *drm,
|
|
struct drm_mode_create_dumb *args);
|
|
|
|
/* create memory region for DRM framebuffer */
|
|
int drm_gem_cma_dumb_create(struct drm_file *file_priv,
|
|
struct drm_device *drm,
|
|
struct drm_mode_create_dumb *args);
|
|
|
|
/* map memory region for DRM framebuffer to user space */
|
|
int drm_gem_cma_dumb_map_offset(struct drm_file *file_priv,
|
|
struct drm_device *drm, u32 handle,
|
|
u64 *offset);
|
|
|
|
/* set vm_flags and we can change the VM attribute to other one at here */
|
|
int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma);
|
|
|
|
/* allocate physical memory */
|
|
struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
|
|
size_t size);
|
|
|
|
extern const struct vm_operations_struct drm_gem_cma_vm_ops;
|
|
|
|
#ifndef CONFIG_MMU
|
|
unsigned long drm_gem_cma_get_unmapped_area(struct file *filp,
|
|
unsigned long addr,
|
|
unsigned long len,
|
|
unsigned long pgoff,
|
|
unsigned long flags);
|
|
#else
|
|
static inline unsigned long drm_gem_cma_get_unmapped_area(struct file *filp,
|
|
unsigned long addr,
|
|
unsigned long len,
|
|
unsigned long pgoff,
|
|
unsigned long flags)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
|
|
#endif
|
|
|
|
struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
|
|
struct drm_gem_object *
|
|
drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
|
|
struct dma_buf_attachment *attach,
|
|
struct sg_table *sgt);
|
|
int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
|
|
struct vm_area_struct *vma);
|
|
void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
|
|
void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
|
|
|
|
#endif /* __DRM_GEM_CMA_HELPER_H__ */
|