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

   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright 2023, Intel Corporation.
   4  */
   5
   6 #include "i915_drv.h"
   7 #include "i915_vma.h"
   8 #include "intel_display_types.h"
   9 #include "intel_dsb_buffer.h"
  10 #include "xe_bo.h"
  11 #include "xe_gt.h"
  12
  13 u32 intel_dsb_buffer_ggtt_offset(struct intel_dsb_buffer *dsb_buf)
  14 {
  15         return xe_bo_ggtt_addr(dsb_buf->vma->bo);
  16 }
  17
  18 void intel_dsb_buffer_write(struct intel_dsb_buffer *dsb_buf, u32 idx, u32 val)
  19 {
  20         iosys_map_wr(&dsb_buf->vma->bo->vmap, idx * 4, u32, val);
  21 }
  22
  23 u32 intel_dsb_buffer_read(struct intel_dsb_buffer *dsb_buf, u32 idx)
  24 {
  25         return iosys_map_rd(&dsb_buf->vma->bo->vmap, idx * 4, u32);
  26 }
  27
  28 void intel_dsb_buffer_memset(struct intel_dsb_buffer *dsb_buf, u32 idx, u32 val, size_t size)
  29 {
  30         WARN_ON(idx > (dsb_buf->buf_size - size) / sizeof(*dsb_buf->cmd_buf));
  31
  32         iosys_map_memset(&dsb_buf->vma->bo->vmap, idx * 4, val, size);
  33 }
  34
  35 bool intel_dsb_buffer_create(struct intel_crtc *crtc, struct intel_dsb_buffer *dsb_buf, size_t size)
  36 {
  37         struct drm_i915_private *i915 = to_i915(crtc->base.dev);
  38         struct drm_i915_gem_object *obj;
  39         struct i915_vma *vma;
  40
  41         vma = kzalloc(sizeof(*vma), GFP_KERNEL);
  42         if (!vma)
  43                 return false;
  44
  45         obj = xe_bo_create_pin_map(i915, xe_device_get_root_tile(i915),
  46                                    NULL, PAGE_ALIGN(size),
  47                                    ttm_bo_type_kernel,
  48                                    XE_BO_FLAG_VRAM_IF_DGFX(xe_device_get_root_tile(i915)) |
  49                                    XE_BO_FLAG_GGTT);
  50         if (IS_ERR(obj)) {
  51                 kfree(vma);
  52                 return false;
  53         }
  54
  55         vma->bo = obj;
  56         dsb_buf->vma = vma;
  57         dsb_buf->buf_size = size;
  58
  59         return true;
  60 }
  61
  62 void intel_dsb_buffer_cleanup(struct intel_dsb_buffer *dsb_buf)
  63 {
  64         xe_bo_unpin_map_no_vm(dsb_buf->vma->bo);
  65         kfree(dsb_buf->vma);
  66 }
  67
  68 void intel_dsb_buffer_flush_map(struct intel_dsb_buffer *dsb_buf)
  69 {
  70         /* TODO: add xe specific flush_map() for dsb buffer object. */
  71 }