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 intel_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 
74 	return to_intel_framebuffer(fb);
75 
76 err:
77 	return ERR_CAST(fb);
78 }
79 
80 int intel_fbdev_fb_fill_info(struct drm_i915_private *i915, struct fb_info *info,
81 			      struct drm_i915_gem_object *obj, struct i915_vma *vma)
82 {
83 	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
84 
85 	if (!(obj->flags & XE_BO_FLAG_SYSTEM)) {
86 		if (obj->flags & XE_BO_FLAG_STOLEN)
87 			info->fix.smem_start = xe_ttm_stolen_io_offset(obj, 0);
88 		else
89 			info->fix.smem_start =
90 				pci_resource_start(pdev, 2) +
91 				xe_bo_addr(obj, 0, XE_PAGE_SIZE);
92 
93 		info->fix.smem_len = obj->ttm.base.size;
94 	} else {
95 		/* XXX: Pure fiction, as the BO may not be physically accessible.. */
96 		info->fix.smem_start = 0;
97 		info->fix.smem_len = obj->ttm.base.size;
98 	}
99 	XE_WARN_ON(iosys_map_is_null(&obj->vmap));
100 
101 	info->screen_base = obj->vmap.vaddr_iomem;
102 	info->screen_size = intel_bo_to_drm_bo(obj)->size;
103 
104 	return 0;
105 }
106