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
 16struct 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_SCANOUT_BIT |
 46					   XE_BO_CREATE_STOLEN_BIT |
 47					   XE_BO_CREATE_PINNED_BIT);
 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_SCANOUT_BIT |
 56					  XE_BO_CREATE_VRAM_IF_DGFX(xe_device_get_root_tile(dev_priv)) |
 57					  XE_BO_CREATE_PINNED_BIT);
 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
 75err:
 76	return fb;
 77}
 78
 79int 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_CREATE_SYSTEM_BIT)) {
 85		if (obj->flags & XE_BO_CREATE_STOLEN_BIT)
 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}