1/* SPDX-License-Identifier: MIT */
  2/*
  3 * Copyright © 2023 Intel Corporation
  4 */
  5
  6#include <drm/drm_fb_helper.h>
  7
  8#include "intel_display_types.h"
  9#include "intel_fb.h"
 10#include "intel_fbdev_fb.h"
 11#include "xe_bo.h"
 12#include "xe_ttm_stolen_mgr.h"
 13#include "xe_wa.h"
 14
 15#include <generated/xe_wa_oob.h>
 16
 17struct intel_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper,
 18					       struct drm_fb_helper_surface_size *sizes)
 19{
 20	struct drm_framebuffer *fb;
 21	struct drm_device *dev = helper->dev;
 22	struct xe_device *xe = to_xe_device(dev);
 23	struct drm_mode_fb_cmd2 mode_cmd = {};
 24	struct xe_bo *obj;
 25	int size;
 26
 27	/* we don't do packed 24bpp */
 28	if (sizes->surface_bpp == 24)
 29		sizes->surface_bpp = 32;
 30
 31	mode_cmd.width = sizes->surface_width;
 32	mode_cmd.height = sizes->surface_height;
 33
 34	mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
 35				    DIV_ROUND_UP(sizes->surface_bpp, 8), XE_PAGE_SIZE);
 36	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 37							  sizes->surface_depth);
 38
 39	size = mode_cmd.pitches[0] * mode_cmd.height;
 40	size = PAGE_ALIGN(size);
 41	obj = ERR_PTR(-ENODEV);
 42
 43	if (!IS_DGFX(xe) && !XE_WA(xe_root_mmio_gt(xe), 22019338487_display)) {
 44		obj = xe_bo_create_pin_map(xe, xe_device_get_root_tile(xe),
 45					   NULL, size,
 46					   ttm_bo_type_kernel, XE_BO_FLAG_SCANOUT |
 47					   XE_BO_FLAG_STOLEN |
 48					   XE_BO_FLAG_PINNED);
 49		if (!IS_ERR(obj))
 50			drm_info(&xe->drm, "Allocated fbdev into stolen\n");
 51		else
 52			drm_info(&xe->drm, "Allocated fbdev into stolen failed: %li\n", PTR_ERR(obj));
 53	}
 54
 55	if (IS_ERR(obj)) {
 56		obj = xe_bo_create_pin_map(xe, xe_device_get_root_tile(xe), NULL, size,
 57					   ttm_bo_type_kernel, XE_BO_FLAG_SCANOUT |
 58					   XE_BO_FLAG_VRAM_IF_DGFX(xe_device_get_root_tile(xe)) |
 59					   XE_BO_FLAG_PINNED);
 60	}
 61
 62	if (IS_ERR(obj)) {
 63		drm_err(&xe->drm, "failed to allocate framebuffer (%pe)\n", obj);
 64		fb = ERR_PTR(-ENOMEM);
 65		goto err;
 66	}
 67
 68	fb = intel_framebuffer_create(&obj->ttm.base, &mode_cmd);
 69	if (IS_ERR(fb)) {
 70		xe_bo_unpin_map_no_vm(obj);
 71		goto err;
 72	}
 73
 74	drm_gem_object_put(&obj->ttm.base);
 75
 76	return to_intel_framebuffer(fb);
 77
 78err:
 79	return ERR_CAST(fb);
 80}
 81
 82int intel_fbdev_fb_fill_info(struct drm_i915_private *i915, struct fb_info *info,
 83			      struct drm_gem_object *_obj, struct i915_vma *vma)
 84{
 85	struct xe_bo *obj = gem_to_xe_bo(_obj);
 86	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
 87
 88	if (!(obj->flags & XE_BO_FLAG_SYSTEM)) {
 89		if (obj->flags & XE_BO_FLAG_STOLEN)
 90			info->fix.smem_start = xe_ttm_stolen_io_offset(obj, 0);
 91		else
 92			info->fix.smem_start =
 93				pci_resource_start(pdev, 2) +
 94				xe_bo_addr(obj, 0, XE_PAGE_SIZE);
 95
 96		info->fix.smem_len = obj->ttm.base.size;
 97	} else {
 98		/* XXX: Pure fiction, as the BO may not be physically accessible.. */
 99		info->fix.smem_start = 0;
100		info->fix.smem_len = obj->ttm.base.size;
101	}
102	XE_WARN_ON(iosys_map_is_null(&obj->vmap));
103
104	info->screen_base = obj->vmap.vaddr_iomem;
105	info->screen_size = obj->ttm.base.size;
106
107	return 0;
108}