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

   1 /* SPDX-License-Identifier: MIT */
   2 /*
   3  * Copyright © 2023 Intel Corporation
   4  */
   5
   6 #include "intel_fbdev_fb.h"
   7
   8 #include <drm/drm_fb_helper.h>
   9
  10 #include "xe_gt.h"
  11 #include "xe_ttm_stolen_mgr.h"
  12
  13 #include "i915_drv.h"
  14 #include "intel_display_types.h"
  15
  16 struct drm_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper,
  17                          struct drm_fb_helper_surface_size *sizes)
  18 {
  19         struct drm_framebuffer *fb;
  20         struct drm_device *dev = helper->dev;
  21         struct drm_i915_private *dev_priv = to_i915(dev);
  22         struct drm_mode_fb_cmd2 mode_cmd = {};
  23         struct drm_i915_gem_object *obj;
  24         int size;
  25
  26         /* we don't do packed 24bpp */
  27         if (sizes->surface_bpp == 24)
  28                 sizes->surface_bpp = 32;
  29
  30         mode_cmd.width = sizes->surface_width;
  31         mode_cmd.height = sizes->surface_height;
  32
  33         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
  34                                     DIV_ROUND_UP(sizes->surface_bpp, 8), XE_PAGE_SIZE);
  35         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
  36                                                           sizes->surface_depth);
  37
  38         size = mode_cmd.pitches[0] * mode_cmd.height;
  39         size = PAGE_ALIGN(size);
  40         obj = ERR_PTR(-ENODEV);
  41
  42         if (!IS_DGFX(dev_priv)) {
  43                 obj = xe_bo_create_pin_map(dev_priv, xe_device_get_root_tile(dev_priv),
  44                                            NULL, size,
  45                                            ttm_bo_type_kernel, XE_BO_FLAG_SCANOUT |
  46                                            XE_BO_FLAG_STOLEN |
  47                                            XE_BO_FLAG_PINNED);
  48                 if (!IS_ERR(obj))
  49                         drm_info(&dev_priv->drm, "Allocated fbdev into stolen\n");
  50                 else
  51                         drm_info(&dev_priv->drm, "Allocated fbdev into stolen failed: %li\n", PTR_ERR(obj));
  52         }
  53         if (IS_ERR(obj)) {
  54                 obj = xe_bo_create_pin_map(dev_priv, xe_device_get_root_tile(dev_priv), NULL, size,
  55                                           ttm_bo_type_kernel, XE_BO_FLAG_SCANOUT |
  56                                           XE_BO_FLAG_VRAM_IF_DGFX(xe_device_get_root_tile(dev_priv)) |
  57                                           XE_BO_FLAG_PINNED);
  58         }
  59
  60         if (IS_ERR(obj)) {
  61                 drm_err(&dev_priv->drm, "failed to allocate framebuffer (%pe)\n", obj);
  62                 fb = ERR_PTR(-ENOMEM);
  63                 goto err;
  64         }
  65
  66         fb = intel_framebuffer_create(obj, &mode_cmd);
  67         if (IS_ERR(fb)) {
  68                 xe_bo_unpin_map_no_vm(obj);
  69                 goto err;
  70         }
  71
  72         drm_gem_object_put(intel_bo_to_drm_bo(obj));
  73         return fb;
  74
  75 err:
  76         return fb;
  77 }
  78
  79 int intel_fbdev_fb_fill_info(struct drm_i915_private *i915, struct fb_info *info,
  80                               struct drm_i915_gem_object *obj, struct i915_vma *vma)
  81 {
  82         struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
  83
  84         if (!(obj->flags & XE_BO_FLAG_SYSTEM)) {
  85                 if (obj->flags & XE_BO_FLAG_STOLEN)
  86                         info->fix.smem_start = xe_ttm_stolen_io_offset(obj, 0);
  87                 else
  88                         info->fix.smem_start =
  89                                 pci_resource_start(pdev, 2) +
  90                                 xe_bo_addr(obj, 0, XE_PAGE_SIZE);
  91
  92                 info->fix.smem_len = obj->ttm.base.size;
  93         } else {
  94                 /* XXX: Pure fiction, as the BO may not be physically accessible.. */
  95                 info->fix.smem_start = 0;
  96                 info->fix.smem_len = obj->ttm.base.size;
  97         }
  98         XE_WARN_ON(iosys_map_is_null(&obj->vmap));
  99
 100         info->screen_base = obj->vmap.vaddr_iomem;
 101         info->screen_size = intel_bo_to_drm_bo(obj)->size;
 102
 103         return 0;
 104 }