linux-4.4.1/ion_heap_ops の履歴(No.1)

• 履歴一覧
• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• linux-4.4.1/ion_heap_ops へ行く。
  • 1 (2016-03-09 (水) 12:32:54)

参照元†

• linux-4.4.1/carveout_heap_ops(global)
• linux-4.4.1/ion_buffer_create()
• linux-4.4.1/ion_buffer_destroy()
• linux-4.4.1/ion_buffer_kmap_get()
• linux-4.4.1/ion_buffer_kmap_put()
• linux-4.4.1/ion_cma_ops(global)
• linux-4.4.1/ion_device_add_heap()
• linux-4.4.1/ion_dma_buf_begin_cpu_access()
• linux-4.4.1/ion_heap
• linux-4.4.1/ion_mmap()

説明†

• パス: linux-4.4.1/drivers/staging/android/ion/ion_priv.h

• FIXME: これは何？
  • 説明

参考†

実装†

/**
 * struct ion_heap_ops - ops to operate on a given heap
 * @allocate:           allocate memory
 * @free:               free memory
 * @phys                get physical address of a buffer (only define on
 *                      physically contiguous heaps)
 * @map_dma             map the memory for dma to a scatterlist
 * @unmap_dma           unmap the memory for dma
 * @map_kernel          map memory to the kernel
 * @unmap_kernel        unmap memory to the kernel
 * @map_user            map memory to userspace
 *
 * allocate, phys, and map_user return 0 on success, -errno on error.
 * map_dma and map_kernel return pointer on success, ERR_PTR on
 * error. @free will be called with ION_PRIV_FLAG_SHRINKER_FREE set in
 * the buffer's private_flags when called from a shrinker. In that
 * case, the pages being free'd must be truly free'd back to the
 * system, not put in a page pool or otherwise cached.
 */
struct ion_heap_ops {
        int (*allocate)(struct ion_heap *heap,
                        struct ion_buffer *buffer, unsigned long len,
                        unsigned long align, unsigned long flags);
        void (*free)(struct ion_buffer *buffer);

• • linux-4.4.1/ion_heap
  • linux-4.4.1/ion_buffer

        int (*phys)(struct ion_heap *heap, struct ion_buffer *buffer,
                    ion_phys_addr_t *addr, size_t *len);

• • linux-4.4.1/ion_phys_addr_t

        struct sg_table * (*map_dma)(struct ion_heap *heap,
                                     struct ion_buffer *buffer);
        void (*unmap_dma)(struct ion_heap *heap, struct ion_buffer *buffer);
        void * (*map_kernel)(struct ion_heap *heap, struct ion_buffer *buffer);
        void (*unmap_kernel)(struct ion_heap *heap, struct ion_buffer *buffer);
        int (*map_user)(struct ion_heap *mapper, struct ion_buffer *buffer,
                        struct vm_area_struct *vma);

• • linux-4.4.1/vm_area_struct

        int (*shrink)(struct ion_heap *heap, gfp_t gfp_mask, int nr_to_scan);

• • linux-4.4.1/gfp_t

};

コメント†