mirror of https://gitee.com/openkylin/linux.git
160 lines
4.1 KiB
C
160 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#ifndef __DRM_GEM_SHMEM_HELPER_H__
|
|
#define __DRM_GEM_SHMEM_HELPER_H__
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/mutex.h>
|
|
|
|
#include <drm/drm_file.h>
|
|
#include <drm/drm_gem.h>
|
|
#include <drm/drm_ioctl.h>
|
|
#include <drm/drm_prime.h>
|
|
|
|
struct dma_buf_attachment;
|
|
struct drm_mode_create_dumb;
|
|
struct drm_printer;
|
|
struct sg_table;
|
|
|
|
/**
|
|
* struct drm_gem_shmem_object - GEM object backed by shmem
|
|
*/
|
|
struct drm_gem_shmem_object {
|
|
/**
|
|
* @base: Base GEM object
|
|
*/
|
|
struct drm_gem_object base;
|
|
|
|
/**
|
|
* @pages_lock: Protects the page table and use count
|
|
*/
|
|
struct mutex pages_lock;
|
|
|
|
/**
|
|
* @pages: Page table
|
|
*/
|
|
struct page **pages;
|
|
|
|
/**
|
|
* @pages_use_count:
|
|
*
|
|
* Reference count on the pages table.
|
|
* The pages are put when the count reaches zero.
|
|
*/
|
|
unsigned int pages_use_count;
|
|
|
|
/**
|
|
* @madv: State for madvise
|
|
*
|
|
* 0 is active/inuse.
|
|
* A negative value is the object is purged.
|
|
* Positive values are driver specific and not used by the helpers.
|
|
*/
|
|
int madv;
|
|
|
|
/**
|
|
* @madv_list: List entry for madvise tracking
|
|
*
|
|
* Typically used by drivers to track purgeable objects
|
|
*/
|
|
struct list_head madv_list;
|
|
|
|
/**
|
|
* @pages_mark_dirty_on_put:
|
|
*
|
|
* Mark pages as dirty when they are put.
|
|
*/
|
|
unsigned int pages_mark_dirty_on_put : 1;
|
|
|
|
/**
|
|
* @pages_mark_accessed_on_put:
|
|
*
|
|
* Mark pages as accessed when they are put.
|
|
*/
|
|
unsigned int pages_mark_accessed_on_put : 1;
|
|
|
|
/**
|
|
* @sgt: Scatter/gather table for imported PRIME buffers
|
|
*/
|
|
struct sg_table *sgt;
|
|
|
|
/**
|
|
* @vmap_lock: Protects the vmap address and use count
|
|
*/
|
|
struct mutex vmap_lock;
|
|
|
|
/**
|
|
* @vaddr: Kernel virtual address of the backing memory
|
|
*/
|
|
void *vaddr;
|
|
|
|
/**
|
|
* @vmap_use_count:
|
|
*
|
|
* Reference count on the virtual address.
|
|
* The address are un-mapped when the count reaches zero.
|
|
*/
|
|
unsigned int vmap_use_count;
|
|
};
|
|
|
|
#define to_drm_gem_shmem_obj(obj) \
|
|
container_of(obj, struct drm_gem_shmem_object, base)
|
|
|
|
struct drm_gem_shmem_object *drm_gem_shmem_create(struct drm_device *dev, size_t size);
|
|
void drm_gem_shmem_free_object(struct drm_gem_object *obj);
|
|
|
|
int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem);
|
|
void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem);
|
|
int drm_gem_shmem_pin(struct drm_gem_object *obj);
|
|
void drm_gem_shmem_unpin(struct drm_gem_object *obj);
|
|
void *drm_gem_shmem_vmap(struct drm_gem_object *obj);
|
|
void drm_gem_shmem_vunmap(struct drm_gem_object *obj, void *vaddr);
|
|
|
|
int drm_gem_shmem_madvise(struct drm_gem_object *obj, int madv);
|
|
|
|
static inline bool drm_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem)
|
|
{
|
|
return (shmem->madv > 0) &&
|
|
!shmem->vmap_use_count && shmem->sgt &&
|
|
!shmem->base.dma_buf && !shmem->base.import_attach;
|
|
}
|
|
|
|
void drm_gem_shmem_purge_locked(struct drm_gem_object *obj);
|
|
bool drm_gem_shmem_purge(struct drm_gem_object *obj);
|
|
|
|
struct drm_gem_shmem_object *
|
|
drm_gem_shmem_create_with_handle(struct drm_file *file_priv,
|
|
struct drm_device *dev, size_t size,
|
|
uint32_t *handle);
|
|
int drm_gem_shmem_dumb_create(struct drm_file *file, struct drm_device *dev,
|
|
struct drm_mode_create_dumb *args);
|
|
|
|
int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
|
|
|
|
void drm_gem_shmem_print_info(struct drm_printer *p, unsigned int indent,
|
|
const struct drm_gem_object *obj);
|
|
|
|
struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_object *obj);
|
|
struct drm_gem_object *
|
|
drm_gem_shmem_prime_import_sg_table(struct drm_device *dev,
|
|
struct dma_buf_attachment *attach,
|
|
struct sg_table *sgt);
|
|
|
|
struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_object *obj);
|
|
|
|
/**
|
|
* DRM_GEM_SHMEM_DRIVER_OPS - Default shmem GEM operations
|
|
*
|
|
* This macro provides a shortcut for setting the shmem GEM operations in
|
|
* the &drm_driver structure.
|
|
*/
|
|
#define DRM_GEM_SHMEM_DRIVER_OPS \
|
|
.prime_handle_to_fd = drm_gem_prime_handle_to_fd, \
|
|
.prime_fd_to_handle = drm_gem_prime_fd_to_handle, \
|
|
.gem_prime_import_sg_table = drm_gem_shmem_prime_import_sg_table, \
|
|
.gem_prime_mmap = drm_gem_prime_mmap, \
|
|
.dumb_create = drm_gem_shmem_dumb_create
|
|
|
|
#endif /* __DRM_GEM_SHMEM_HELPER_H__ */
|