mediatek.c

   1 /*
   2  * Copyright 2015 The Chromium OS Authors. All rights reserved.
   3  * Use of this source code is governed by a BSD-style license that can be
   4  * found in the LICENSE file.
   5  */
   6
   7 #ifdef DRV_MEDIATEK
   8
   9 // clang-format off
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <sys/mman.h>
  13 #include <xf86drm.h>
  14 #include <mediatek_drm.h>
  15 // clang-format on
  16
  17 #include "drv_priv.h"
  18 #include "helpers.h"
  19 #include "util.h"
  20
  21 struct mediatek_private_map_data {
  22         void *cached_addr;
  23         void *gem_addr;
  24 };
  25
  26 static const uint32_t render_target_formats[] = { DRM_FORMAT_ABGR8888, DRM_FORMAT_ARGB8888,
  27                                                   DRM_FORMAT_RGB565, DRM_FORMAT_XBGR8888,
  28                                                   DRM_FORMAT_XRGB8888 };
  29
  30 static const uint32_t texture_source_formats[] = { DRM_FORMAT_R8, DRM_FORMAT_YVU420,
  31                                                    DRM_FORMAT_YVU420_ANDROID };
  32
  33 static int mediatek_init(struct driver *drv)
  34 {
  35         drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
  36                              &LINEAR_METADATA, BO_USE_RENDER_MASK);
  37
  38         drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats),
  39                              &LINEAR_METADATA, BO_USE_TEXTURE_MASK);
  40
  41         return drv_modify_linear_combinations(drv);
  42 }
  43
  44 static int mediatek_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
  45                               uint64_t use_flags)
  46 {
  47         int ret;
  48         size_t plane;
  49         uint32_t stride;
  50         struct drm_mtk_gem_create gem_create;
  51
  52         /*
  53          * Since the ARM L1 cache line size is 64 bytes, align to that as a
  54          * performance optimization.
  55          */
  56         stride = drv_stride_from_format(format, width, 0);
  57         stride = ALIGN(stride, 64);
  58         drv_bo_from_format(bo, stride, height, format);
  59
  60         memset(&gem_create, 0, sizeof(gem_create));
  61         gem_create.size = bo->total_size;
  62
  63         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_CREATE, &gem_create);
  64         if (ret) {
  65                 fprintf(stderr, "drv: DRM_IOCTL_MTK_GEM_CREATE failed (size=%llu)\n",
  66                         gem_create.size);
  67                 return ret;
  68         }
  69
  70         for (plane = 0; plane < bo->num_planes; plane++)
  71                 bo->handles[plane].u32 = gem_create.handle;
  72
  73         return 0;
  74 }
  75
  76 static void *mediatek_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
  77 {
  78         int ret;
  79         struct drm_mtk_gem_map_off gem_map;
  80         struct mediatek_private_map_data *priv;
  81
  82         memset(&gem_map, 0, sizeof(gem_map));
  83         gem_map.handle = bo->handles[0].u32;
  84
  85         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_MAP_OFFSET, &gem_map);
  86         if (ret) {
  87                 fprintf(stderr, "drv: DRM_IOCTL_MTK_GEM_MAP_OFFSET failed\n");
  88                 return MAP_FAILED;
  89         }
  90
  91         void *addr = mmap(0, bo->total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
  92                           gem_map.offset);
  93
  94         vma->length = bo->total_size;
  95
  96         if (bo->use_flags & BO_USE_RENDERSCRIPT) {
  97                 priv = calloc(1, sizeof(*priv));
  98                 priv->cached_addr = calloc(1, bo->total_size);
  99                 priv->gem_addr = addr;
 100                 vma->priv = priv;
 101                 addr = priv->cached_addr;
 102         }
 103
 104         return addr;
 105 }
 106
 107 static int mediatek_bo_unmap(struct bo *bo, struct vma *vma)
 108 {
 109         if (vma->priv) {
 110                 struct mediatek_private_map_data *priv = vma->priv;
 111                 vma->addr = priv->gem_addr;
 112                 free(priv->cached_addr);
 113                 free(priv);
 114                 vma->priv = NULL;
 115         }
 116
 117         return munmap(vma->addr, vma->length);
 118 }
 119
 120 static int mediatek_bo_invalidate(struct bo *bo, struct mapping *mapping)
 121 {
 122         if (mapping->vma->priv) {
 123                 struct mediatek_private_map_data *priv = mapping->vma->priv;
 124                 memcpy(priv->cached_addr, priv->gem_addr, bo->total_size);
 125         }
 126
 127         return 0;
 128 }
 129
 130 static int mediatek_bo_flush(struct bo *bo, struct mapping *mapping)
 131 {
 132         struct mediatek_private_map_data *priv = mapping->vma->priv;
 133         if (priv && (mapping->vma->map_flags & BO_MAP_WRITE))
 134                 memcpy(priv->gem_addr, priv->cached_addr, bo->total_size);
 135
 136         return 0;
 137 }
 138
 139 static uint32_t mediatek_resolve_format(uint32_t format, uint64_t use_flags)
 140 {
 141         switch (format) {
 142         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
 143                 /*HACK: See b/28671744 */
 144                 return DRM_FORMAT_XBGR8888;
 145         case DRM_FORMAT_FLEX_YCbCr_420_888:
 146                 return DRM_FORMAT_YVU420;
 147         default:
 148                 return format;
 149         }
 150 }
 151
 152 const struct backend backend_mediatek = {
 153         .name = "mediatek",
 154         .init = mediatek_init,
 155         .bo_create = mediatek_bo_create,
 156         .bo_destroy = drv_gem_bo_destroy,
 157         .bo_import = drv_prime_bo_import,
 158         .bo_map = mediatek_bo_map,
 159         .bo_unmap = mediatek_bo_unmap,
 160         .bo_invalidate = mediatek_bo_invalidate,
 161         .bo_flush = mediatek_bo_flush,
 162         .resolve_format = mediatek_resolve_format,
 163 };
 164
 165 #endif