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13665885b1
If stolen memory cannot be allocated for the fbdev because of the preference for fbc, have an info about that in the log. v2: log text changed Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Acked-by: Mika Kahola <mika.kahola@intel.com> Link: https://patch.msgid.link/20260220170908.201422-7-vinod.govindapillai@intel.com
119 lines
2.8 KiB
C
119 lines
2.8 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2023 Intel Corporation
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*/
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#include <linux/fb.h>
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#include <drm/drm_print.h>
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#include "gem/i915_gem_lmem.h"
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#include "i915_drv.h"
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#include "intel_fbdev_fb.h"
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u32 intel_fbdev_fb_pitch_align(u32 stride)
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{
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return ALIGN(stride, 64);
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}
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bool intel_fbdev_fb_prefer_stolen(struct drm_device *drm, unsigned int size)
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{
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struct drm_i915_private *i915 = to_i915(drm);
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/* Skip stolen on MTL as Wa_22018444074 mitigation. */
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if (IS_METEORLAKE(i915))
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return false;
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/*
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* If the FB is too big, just don't use it since fbdev is not very
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* important and we should probably use that space with FBC or other
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* features.
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*/
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return i915->dsm.usable_size >= size * 2;
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}
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struct drm_gem_object *intel_fbdev_fb_bo_create(struct drm_device *drm, int size)
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{
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struct drm_i915_private *i915 = to_i915(drm);
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struct drm_i915_gem_object *obj;
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obj = ERR_PTR(-ENODEV);
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if (HAS_LMEM(i915)) {
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obj = i915_gem_object_create_lmem(i915, size,
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I915_BO_ALLOC_CONTIGUOUS |
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I915_BO_ALLOC_USER);
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} else {
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if (intel_fbdev_fb_prefer_stolen(drm, size))
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obj = i915_gem_object_create_stolen(i915, size);
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else
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drm_info(drm, "Allocating fbdev: Stolen memory not preferred.\n");
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if (IS_ERR(obj))
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obj = i915_gem_object_create_shmem(i915, size);
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}
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if (IS_ERR(obj)) {
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drm_err(drm, "failed to allocate framebuffer (%pe)\n", obj);
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return ERR_PTR(-ENOMEM);
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}
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return &obj->base;
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}
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void intel_fbdev_fb_bo_destroy(struct drm_gem_object *obj)
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{
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drm_gem_object_put(obj);
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}
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int intel_fbdev_fb_fill_info(struct drm_device *drm, struct fb_info *info,
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struct drm_gem_object *_obj, struct i915_vma *vma)
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{
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struct drm_i915_private *i915 = to_i915(drm);
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struct drm_i915_gem_object *obj = to_intel_bo(_obj);
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struct i915_gem_ww_ctx ww;
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void __iomem *vaddr;
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int ret;
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if (i915_gem_object_is_lmem(obj)) {
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struct intel_memory_region *mem = obj->mm.region;
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/* Use fbdev's framebuffer from lmem for discrete */
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info->fix.smem_start =
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(unsigned long)(mem->io.start +
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i915_gem_object_get_dma_address(obj, 0) -
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mem->region.start);
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info->fix.smem_len = obj->base.size;
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} else {
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struct i915_ggtt *ggtt = to_gt(i915)->ggtt;
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/* Our framebuffer is the entirety of fbdev's system memory */
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info->fix.smem_start =
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(unsigned long)(ggtt->gmadr.start + i915_ggtt_offset(vma));
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info->fix.smem_len = vma->size;
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}
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for_i915_gem_ww(&ww, ret, false) {
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ret = i915_gem_object_lock(vma->obj, &ww);
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if (ret)
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continue;
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vaddr = i915_vma_pin_iomap(vma);
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if (IS_ERR(vaddr)) {
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drm_err(drm,
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"Failed to remap framebuffer into virtual memory (%pe)\n", vaddr);
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ret = PTR_ERR(vaddr);
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continue;
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}
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}
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if (ret)
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return ret;
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info->screen_base = vaddr;
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info->screen_size = intel_bo_to_drm_bo(obj)->size;
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return 0;
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}
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