include/drm/drm_gem_cma_helper.h

   1 #ifndef __DRM_GEM_CMA_HELPER_H__
   2 #define __DRM_GEM_CMA_HELPER_H__
   3
   4 #include <drm/drmP.h>
   5 #include <drm/drm_gem.h>
   6
   7 /**
   8  * struct drm_gem_cma_object - GEM object backed by CMA memory allocations
   9  * @base: base GEM object
  10  * @paddr: physical address of the backing memory
  11  * @sgt: scatter/gather table for imported PRIME buffers
  12  * @vaddr: kernel virtual address of the backing memory
  13  */
  14 struct drm_gem_cma_object {
  15         struct drm_gem_object base;
  16         dma_addr_t paddr;
  17         struct sg_table *sgt;
  18
  19         /* For objects with DMA memory allocated by GEM CMA */
  20         void *vaddr;
  21 };
  22
  23 static inline struct drm_gem_cma_object *
  24 to_drm_gem_cma_obj(struct drm_gem_object *gem_obj)
  25 {
  26         return container_of(gem_obj, struct drm_gem_cma_object, base);
  27 }
  28
  29 /* free GEM object */
  30 void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
  31
  32 /* create memory region for DRM framebuffer */
  33 int drm_gem_cma_dumb_create_internal(struct drm_file *file_priv,
  34                                      struct drm_device *drm,
  35                                      struct drm_mode_create_dumb *args);
  36
  37 /* create memory region for DRM framebuffer */
  38 int drm_gem_cma_dumb_create(struct drm_file *file_priv,
  39                             struct drm_device *drm,
  40                             struct drm_mode_create_dumb *args);
  41
  42 /* map memory region for DRM framebuffer to user space */
  43 int drm_gem_cma_dumb_map_offset(struct drm_file *file_priv,
  44                                 struct drm_device *drm, u32 handle,
  45                                 u64 *offset);
  46
  47 /* set vm_flags and we can change the VM attribute to other one at here */
  48 int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma);
  49
  50 /* allocate physical memory */
  51 struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
  52                                               size_t size);
  53
  54 extern const struct vm_operations_struct drm_gem_cma_vm_ops;
  55
  56 #ifndef CONFIG_MMU
  57 unsigned long drm_gem_cma_get_unmapped_area(struct file *filp,
  58                                             unsigned long addr,
  59                                             unsigned long len,
  60                                             unsigned long pgoff,
  61                                             unsigned long flags);
  62 #else
  63 static inline unsigned long drm_gem_cma_get_unmapped_area(struct file *filp,
  64                                                           unsigned long addr,
  65                                                           unsigned long len,
  66                                                           unsigned long pgoff,
  67                                                           unsigned long flags)
  68 {
  69         return -EINVAL;
  70 }
  71 #endif
  72
  73 #ifdef CONFIG_DEBUG_FS
  74 void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
  75 #endif
  76
  77 struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
  78 struct drm_gem_object *
  79 drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
  80                                   struct dma_buf_attachment *attach,
  81                                   struct sg_table *sgt);
  82 int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
  83                            struct vm_area_struct *vma);
  84 void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
  85 void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
  86
  87 #endif /* __DRM_GEM_CMA_HELPER_H__ */