drivers/gpu/drm/xe/display/intel_fb_bo.c

   1 /* SPDX-License-Identifier: MIT */
   2 /*
   3  * Copyright © 2021 Intel Corporation
   4  */
   5
   6 #include <drm/drm_modeset_helper.h>
   7
   8 #include "i915_drv.h"
   9 #include "intel_display_types.h"
  10 #include "intel_fb_bo.h"
  11
  12 void intel_fb_bo_framebuffer_fini(struct xe_bo *bo)
  13 {
  14         if (bo->flags & XE_BO_CREATE_PINNED_BIT) {
  15                 /* Unpin our kernel fb first */
  16                 xe_bo_lock(bo, false);
  17                 xe_bo_unpin(bo);
  18                 xe_bo_unlock(bo);
  19         }
  20         xe_bo_put(bo);
  21 }
  22
  23 int intel_fb_bo_framebuffer_init(struct intel_framebuffer *intel_fb,
  24                                  struct xe_bo *bo,
  25                                  struct drm_mode_fb_cmd2 *mode_cmd)
  26 {
  27         struct drm_i915_private *i915 = to_i915(bo->ttm.base.dev);
  28         int ret;
  29
  30         xe_bo_get(bo);
  31
  32         ret = ttm_bo_reserve(&bo->ttm, true, false, NULL);
  33         if (ret)
  34                 return ret;
  35
  36         if (!(bo->flags & XE_BO_SCANOUT_BIT)) {
  37                 /*
  38                  * XE_BO_SCANOUT_BIT should ideally be set at creation, or is
  39                  * automatically set when creating FB. We cannot change caching
  40                  * mode when the boect is VM_BINDed, so we can only set
  41                  * coherency with display when unbound.
  42                  */
  43                 if (XE_IOCTL_DBG(i915, !list_empty(&bo->ttm.base.gpuva.list))) {
  44                         ttm_bo_unreserve(&bo->ttm);
  45                         return -EINVAL;
  46                 }
  47                 bo->flags |= XE_BO_SCANOUT_BIT;
  48         }
  49         ttm_bo_unreserve(&bo->ttm);
  50
  51         return ret;
  52 }
  53
  54 struct xe_bo *intel_fb_bo_lookup_valid_bo(struct drm_i915_private *i915,
  55                                           struct drm_file *filp,
  56                                           const struct drm_mode_fb_cmd2 *mode_cmd)
  57 {
  58         struct drm_i915_gem_object *bo;
  59         struct drm_gem_object *gem = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
  60
  61         if (!gem)
  62                 return ERR_PTR(-ENOENT);
  63
  64         bo = gem_to_xe_bo(gem);
  65         /* Require vram placement or dma-buf import */
  66         if (IS_DGFX(i915) &&
  67             !xe_bo_can_migrate(gem_to_xe_bo(gem), XE_PL_VRAM0) &&
  68             bo->ttm.type != ttm_bo_type_sg) {
  69                 drm_gem_object_put(gem);
  70                 return ERR_PTR(-EREMOTE);
  71         }
  72
  73         return bo;
  74 }