linux/drivers/gpu/drm/i915/gvt/dmabuf.c

/*
 * Copyright 2017 Intel Corporation. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *    Zhiyuan Lv <[email protected]>
 *
 * Contributors:
 *    Xiaoguang Chen
 *    Tina Zhang <[email protected]>
 */

#include <linux/dma-buf.h>
#include <linux/mdev.h>

#include <drm/drm_fourcc.h>
#include <drm/drm_plane.h>

#include "gem/i915_gem_dmabuf.h"

#include "i915_drv.h"
#include "gvt.h"

#include "display/skl_universal_plane_regs.h"

#define GEN8_DECODE_PTE(pte) …

static int vgpu_gem_get_pages(struct drm_i915_gem_object *obj)
{ … }

static void vgpu_gem_put_pages(struct drm_i915_gem_object *obj,
		struct sg_table *pages)
{ … }

static void dmabuf_gem_object_free(struct kref *kref)
{ … }


static inline void dmabuf_obj_get(struct intel_vgpu_dmabuf_obj *obj)
{ … }

static inline void dmabuf_obj_put(struct intel_vgpu_dmabuf_obj *obj)
{ … }

static void vgpu_gem_release(struct drm_i915_gem_object *gem_obj)
{ … }

static const struct drm_i915_gem_object_ops intel_vgpu_gem_ops = …;

static struct drm_i915_gem_object *vgpu_create_gem(struct drm_device *dev,
		struct intel_vgpu_fb_info *info)
{ … }

static bool validate_hotspot(struct intel_vgpu_cursor_plane_format *c)
{ … }

static int vgpu_get_plane_info(struct drm_device *dev,
		struct intel_vgpu *vgpu,
		struct intel_vgpu_fb_info *info,
		int plane_id)
{ … }

static struct intel_vgpu_dmabuf_obj *
pick_dmabuf_by_info(struct intel_vgpu *vgpu,
		    struct intel_vgpu_fb_info *latest_info)
{ … }

static struct intel_vgpu_dmabuf_obj *
pick_dmabuf_by_num(struct intel_vgpu *vgpu, u32 id)
{ … }

static void update_fb_info(struct vfio_device_gfx_plane_info *gvt_dmabuf,
		      struct intel_vgpu_fb_info *fb_info)
{ … }

int intel_vgpu_query_plane(struct intel_vgpu *vgpu, void *args)
{ … }

/* To associate an exposed dmabuf with the dmabuf_obj */
int intel_vgpu_get_dmabuf(struct intel_vgpu *vgpu, unsigned int dmabuf_id)
{ … }

void intel_vgpu_dmabuf_cleanup(struct intel_vgpu *vgpu)
{ … }