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 <errno.h>
  11 #include <fcntl.h>
  12 #include <poll.h>
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <sys/mman.h>
  16 #include <unistd.h>
  17 #include <xf86drm.h>
  18 #include <mediatek_drm.h>
  19 // clang-format on
  20
  21 #include "drv_priv.h"
  22 #include "helpers.h"
  23 #include "util.h"
  24
  25 #define TILE_TYPE_LINEAR 0
  26
  27 struct mediatek_private_map_data {
  28         void *cached_addr;
  29         void *gem_addr;
  30         int prime_fd;
  31 };
  32
  33 static const uint32_t render_target_formats[] = { DRM_FORMAT_ABGR8888, DRM_FORMAT_ARGB8888,
  34                                                   DRM_FORMAT_RGB565, DRM_FORMAT_XBGR8888,
  35                                                   DRM_FORMAT_XRGB8888 };
  36
  37 static const uint32_t texture_source_formats[] = { DRM_FORMAT_R8, DRM_FORMAT_YVU420,
  38                                                    DRM_FORMAT_YVU420_ANDROID };
  39
  40 static int mediatek_init(struct driver *drv)
  41 {
  42         struct format_metadata metadata;
  43
  44         drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
  45                              &LINEAR_METADATA, BO_USE_RENDER_MASK);
  46
  47         drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats),
  48                              &LINEAR_METADATA, BO_USE_TEXTURE_MASK);
  49
  50         /* Android CTS tests require this. */
  51         drv_add_combination(drv, DRM_FORMAT_BGR888, &LINEAR_METADATA, BO_USE_SW_MASK);
  52
  53         /* Support BO_USE_HW_VIDEO_DECODER for protected content minigbm allocations. */
  54         metadata.tiling = TILE_TYPE_LINEAR;
  55         metadata.priority = 1;
  56         metadata.modifier = DRM_FORMAT_MOD_LINEAR;
  57         drv_modify_combination(drv, DRM_FORMAT_YVU420, &metadata, BO_USE_HW_VIDEO_DECODER);
  58         drv_modify_combination(drv, DRM_FORMAT_YVU420_ANDROID, &metadata, BO_USE_HW_VIDEO_DECODER);
  59
  60         return drv_modify_linear_combinations(drv);
  61 }
  62
  63 static int mediatek_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
  64                               uint64_t use_flags)
  65 {
  66         int ret;
  67         size_t plane;
  68         uint32_t stride;
  69         struct drm_mtk_gem_create gem_create;
  70
  71         /*
  72          * Since the ARM L1 cache line size is 64 bytes, align to that as a
  73          * performance optimization.
  74          */
  75         stride = drv_stride_from_format(format, width, 0);
  76         stride = ALIGN(stride, 64);
  77         drv_bo_from_format(bo, stride, height, format);
  78
  79         memset(&gem_create, 0, sizeof(gem_create));
  80         gem_create.size = bo->total_size;
  81
  82         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_CREATE, &gem_create);
  83         if (ret) {
  84                 drv_log("DRM_IOCTL_MTK_GEM_CREATE failed (size=%llu)\n", gem_create.size);
  85                 return -errno;
  86         }
  87
  88         for (plane = 0; plane < bo->num_planes; plane++)
  89                 bo->handles[plane].u32 = gem_create.handle;
  90
  91         return 0;
  92 }
  93
  94 static void *mediatek_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
  95 {
  96         int ret, prime_fd;
  97         struct drm_mtk_gem_map_off gem_map;
  98         struct mediatek_private_map_data *priv;
  99
 100         memset(&gem_map, 0, sizeof(gem_map));
 101         gem_map.handle = bo->handles[0].u32;
 102
 103         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_MAP_OFFSET, &gem_map);
 104         if (ret) {
 105                 drv_log("DRM_IOCTL_MTK_GEM_MAP_OFFSET failed\n");
 106                 return MAP_FAILED;
 107         }
 108
 109         ret = drmPrimeHandleToFD(bo->drv->fd, gem_map.handle, DRM_CLOEXEC, &prime_fd);
 110         if (ret) {
 111                 drv_log("Failed to get a prime fd\n");
 112                 return MAP_FAILED;
 113         }
 114
 115         void *addr = mmap(0, bo->total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
 116                           gem_map.offset);
 117
 118         vma->length = bo->total_size;
 119
 120         priv = calloc(1, sizeof(*priv));
 121         priv->prime_fd = prime_fd;
 122         vma->priv = priv;
 123
 124         if (bo->use_flags & BO_USE_RENDERSCRIPT) {
 125                 priv->cached_addr = calloc(1, bo->total_size);
 126                 priv->gem_addr = addr;
 127                 addr = priv->cached_addr;
 128         }
 129
 130         return addr;
 131 }
 132
 133 static int mediatek_bo_unmap(struct bo *bo, struct vma *vma)
 134 {
 135         if (vma->priv) {
 136                 struct mediatek_private_map_data *priv = vma->priv;
 137
 138                 if (priv->cached_addr) {
 139                         vma->addr = priv->gem_addr;
 140                         free(priv->cached_addr);
 141                 }
 142
 143                 close(priv->prime_fd);
 144                 free(priv);
 145                 vma->priv = NULL;
 146         }
 147
 148         return munmap(vma->addr, vma->length);
 149 }
 150
 151 static int mediatek_bo_invalidate(struct bo *bo, struct mapping *mapping)
 152 {
 153         struct mediatek_private_map_data *priv = mapping->vma->priv;
 154
 155         if (priv) {
 156                 struct pollfd fds = {
 157                         .fd = priv->prime_fd,
 158                 };
 159
 160                 if (mapping->vma->map_flags & BO_MAP_WRITE)
 161                         fds.events |= POLLOUT;
 162
 163                 if (mapping->vma->map_flags & BO_MAP_READ)
 164                         fds.events |= POLLIN;
 165
 166                 poll(&fds, 1, -1);
 167                 if (fds.revents != fds.events)
 168                         drv_log("poll prime_fd failed\n");
 169
 170                 if (priv->cached_addr)
 171                         memcpy(priv->cached_addr, priv->gem_addr, bo->total_size);
 172         }
 173
 174         return 0;
 175 }
 176
 177 static int mediatek_bo_flush(struct bo *bo, struct mapping *mapping)
 178 {
 179         struct mediatek_private_map_data *priv = mapping->vma->priv;
 180         if (priv && priv->cached_addr && (mapping->vma->map_flags & BO_MAP_WRITE))
 181                 memcpy(priv->gem_addr, priv->cached_addr, bo->total_size);
 182
 183         return 0;
 184 }
 185
 186 static uint32_t mediatek_resolve_format(uint32_t format, uint64_t use_flags)
 187 {
 188         switch (format) {
 189         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
 190                 /*HACK: See b/28671744 */
 191                 return DRM_FORMAT_XBGR8888;
 192         case DRM_FORMAT_FLEX_YCbCr_420_888:
 193                 return DRM_FORMAT_YVU420;
 194         default:
 195                 return format;
 196         }
 197 }
 198
 199 const struct backend backend_mediatek = {
 200         .name = "mediatek",
 201         .init = mediatek_init,
 202         .bo_create = mediatek_bo_create,
 203         .bo_destroy = drv_gem_bo_destroy,
 204         .bo_import = drv_prime_bo_import,
 205         .bo_map = mediatek_bo_map,
 206         .bo_unmap = mediatek_bo_unmap,
 207         .bo_invalidate = mediatek_bo_invalidate,
 208         .bo_flush = mediatek_bo_flush,
 209         .resolve_format = mediatek_resolve_format,
 210 };
 211
 212 #endif