linux/drivers/gpu/drm/rockchip/rockchip_drm_gem.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
 * Author:Mark Yao <[email protected]>
 */

#include <linux/dma-buf.h>
#include <linux/iommu.h>
#include <linux/vmalloc.h>

#include <drm/drm.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_prime.h>
#include <drm/drm_vma_manager.h>

#include "rockchip_drm_drv.h"
#include "rockchip_drm_gem.h"

static int rockchip_gem_iommu_map(struct rockchip_gem_object *rk_obj)
{ … }

static int rockchip_gem_iommu_unmap(struct rockchip_gem_object *rk_obj)
{ … }

static int rockchip_gem_get_pages(struct rockchip_gem_object *rk_obj)
{ … }

static void rockchip_gem_put_pages(struct rockchip_gem_object *rk_obj)
{ … }

static int rockchip_gem_alloc_iommu(struct rockchip_gem_object *rk_obj,
				    bool alloc_kmap)
{ … }

static int rockchip_gem_alloc_dma(struct rockchip_gem_object *rk_obj,
				  bool alloc_kmap)
{ … }

static int rockchip_gem_alloc_buf(struct rockchip_gem_object *rk_obj,
				  bool alloc_kmap)
{ … }

static void rockchip_gem_free_iommu(struct rockchip_gem_object *rk_obj)
{ … }

static void rockchip_gem_free_dma(struct rockchip_gem_object *rk_obj)
{ … }

static void rockchip_gem_free_buf(struct rockchip_gem_object *rk_obj)
{ … }

static int rockchip_drm_gem_object_mmap_iommu(struct drm_gem_object *obj,
					      struct vm_area_struct *vma)
{ … }

static int rockchip_drm_gem_object_mmap_dma(struct drm_gem_object *obj,
					    struct vm_area_struct *vma)
{ … }

static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj,
					struct vm_area_struct *vma)
{ … }

static void rockchip_gem_release_object(struct rockchip_gem_object *rk_obj)
{ … }

static const struct drm_gem_object_funcs rockchip_gem_object_funcs = …;

static struct rockchip_gem_object *
	rockchip_gem_alloc_object(struct drm_device *drm, unsigned int size)
{ … }

struct rockchip_gem_object *
rockchip_gem_create_object(struct drm_device *drm, unsigned int size,
			   bool alloc_kmap)
{ … }

/*
 * rockchip_gem_free_object - (struct drm_gem_object_funcs)->free
 * callback function
 */
void rockchip_gem_free_object(struct drm_gem_object *obj)
{ … }

/*
 * rockchip_gem_create_with_handle - allocate an object with the given
 * size and create a gem handle on it
 *
 * returns a struct rockchip_gem_object* on success or ERR_PTR values
 * on failure.
 */
static struct rockchip_gem_object *
rockchip_gem_create_with_handle(struct drm_file *file_priv,
				struct drm_device *drm, unsigned int size,
				unsigned int *handle)
{ … }

/*
 * rockchip_gem_dumb_create - (struct drm_driver)->dumb_create callback
 * function
 *
 * This aligns the pitch and size arguments to the minimum required. wrap
 * this into your own function if you need bigger alignment.
 */
int rockchip_gem_dumb_create(struct drm_file *file_priv,
			     struct drm_device *dev,
			     struct drm_mode_create_dumb *args)
{ … }

/*
 * Allocate a sg_table for this GEM object.
 * Note: Both the table's contents, and the sg_table itself must be freed by
 *       the caller.
 * Returns a pointer to the newly allocated sg_table, or an ERR_PTR() error.
 */
struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj)
{ … }

static int
rockchip_gem_iommu_map_sg(struct drm_device *drm,
			  struct dma_buf_attachment *attach,
			  struct sg_table *sg,
			  struct rockchip_gem_object *rk_obj)
{ … }

static int
rockchip_gem_dma_map_sg(struct drm_device *drm,
			struct dma_buf_attachment *attach,
			struct sg_table *sg,
			struct rockchip_gem_object *rk_obj)
{ … }

struct drm_gem_object *
rockchip_gem_prime_import_sg_table(struct drm_device *drm,
				   struct dma_buf_attachment *attach,
				   struct sg_table *sg)
{ … }

int rockchip_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
{ … }

void rockchip_gem_prime_vunmap(struct drm_gem_object *obj,
			       struct iosys_map *map)
{ … }