vc4.c

   1 /*
   2  * Copyright 2017 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_VC4
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <sys/mman.h>
  12 #include <vc4_drm.h>
  13 #include <xf86drm.h>
  14
  15 #include "drv_priv.h"
  16 #include "helpers.h"
  17 #include "util.h"
  18
  19 static struct supported_combination combos[3] = {
  20         {DRM_FORMAT_ARGB8888, DRM_FORMAT_MOD_NONE,
  21                 BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_RENDERING | BO_USE_SW_READ_OFTEN |
  22                 BO_USE_SW_WRITE_OFTEN | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  23         {DRM_FORMAT_RGB565, DRM_FORMAT_MOD_NONE,
  24                 BO_USE_RENDERING | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN |
  25                 BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  26         {DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_NONE,
  27                 BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_RENDERING | BO_USE_SW_READ_OFTEN |
  28                 BO_USE_SW_WRITE_OFTEN | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  29 };
  30
  31 static int vc4_init(struct driver *drv)
  32 {
  33         drv_insert_combinations(drv, combos, ARRAY_SIZE(combos));
  34         return drv_add_kms_flags(drv);
  35 }
  36
  37 static int vc4_bo_create(struct bo *bo, uint32_t width, uint32_t height,
  38                          uint32_t format, uint32_t flags)
  39 {
  40         int ret;
  41         size_t plane;
  42         struct drm_vc4_create_bo bo_create;
  43
  44         drv_bo_from_format(bo, width, height, format);
  45
  46         memset(&bo_create, 0, sizeof(bo_create));
  47         bo_create.size = bo->total_size;
  48
  49         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VC4_CREATE_BO, &bo_create);
  50         if (ret) {
  51                 fprintf(stderr, "drv: DRM_IOCTL_VC4_GEM_CREATE failed "
  52                                 "(size=%zu)\n", bo->total_size);
  53                 return ret;
  54         }
  55
  56         for (plane = 0; plane < bo->num_planes; plane++)
  57                 bo->handles[plane].u32 = bo_create.handle;
  58
  59         return 0;
  60 }
  61
  62 static void *vc4_bo_map(struct bo *bo, struct map_info *data, size_t plane)
  63 {
  64         int ret;
  65         struct drm_vc4_mmap_bo bo_map;
  66
  67         memset(&bo_map, 0, sizeof(bo_map));
  68         bo_map.handle = bo->handles[0].u32;
  69
  70         ret = drmCommandWriteRead(bo->drv->fd, DRM_VC4_MMAP_BO, &bo_map,
  71                                   sizeof(bo_map));
  72         if (ret) {
  73                 fprintf(stderr, "drv: DRM_VC4_MMAP_BO failed\n");
  74                 return MAP_FAILED;
  75         }
  76
  77         data->length = bo->total_size;
  78
  79         return mmap(0, bo->total_size, PROT_READ | PROT_WRITE, MAP_SHARED,
  80                     bo->drv->fd, bo_map.offset);
  81 }
  82
  83 struct backend backend_vc4 =
  84 {
  85         .name = "vc4",
  86         .init = vc4_init,
  87         .bo_create = vc4_bo_create,
  88         .bo_import = drv_prime_bo_import,
  89         .bo_destroy = drv_gem_bo_destroy,
  90         .bo_map = vc4_bo_map,
  91 };
  92
  93 #endif