src/freedreno/drm/msm_bo.c

   1 /*
   2  * Copyright (C) 2012-2018 Rob Clark <robclark@freedesktop.org>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  * Authors:
  24  *    Rob Clark <robclark@freedesktop.org>
  25  */
  26
  27 #include "msm_priv.h"
  28
  29 static int bo_allocate(struct msm_bo *msm_bo)
  30 {
  31         struct fd_bo *bo = &msm_bo->base;
  32         if (!msm_bo->offset) {
  33                 struct drm_msm_gem_info req = {
  34                                 .handle = bo->handle,
  35                 };
  36                 int ret;
  37
  38                 /* if the buffer is already backed by pages then this
  39                  * doesn't actually do anything (other than giving us
  40                  * the offset)
  41                  */
  42                 ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_INFO,
  43                                 &req, sizeof(req));
  44                 if (ret) {
  45                         ERROR_MSG("alloc failed: %s", strerror(errno));
  46                         return ret;
  47                 }
  48
  49                 msm_bo->offset = req.offset;
  50         }
  51
  52         return 0;
  53 }
  54
  55 static int msm_bo_offset(struct fd_bo *bo, uint64_t *offset)
  56 {
  57         struct msm_bo *msm_bo = to_msm_bo(bo);
  58         int ret = bo_allocate(msm_bo);
  59         if (ret)
  60                 return ret;
  61         *offset = msm_bo->offset;
  62         return 0;
  63 }
  64
  65 static int msm_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
  66 {
  67         struct drm_msm_gem_cpu_prep req = {
  68                         .handle = bo->handle,
  69                         .op = op,
  70         };
  71
  72         get_abs_timeout(&req.timeout, 5000000000);
  73
  74         return drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_PREP, &req, sizeof(req));
  75 }
  76
  77 static void msm_bo_cpu_fini(struct fd_bo *bo)
  78 {
  79         struct drm_msm_gem_cpu_fini req = {
  80                         .handle = bo->handle,
  81         };
  82
  83         drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_FINI, &req, sizeof(req));
  84 }
  85
  86 static int msm_bo_madvise(struct fd_bo *bo, int willneed)
  87 {
  88         struct drm_msm_gem_madvise req = {
  89                         .handle = bo->handle,
  90                         .madv = willneed ? MSM_MADV_WILLNEED : MSM_MADV_DONTNEED,
  91         };
  92         int ret;
  93
  94         /* older kernels do not support this: */
  95         if (bo->dev->version < FD_VERSION_MADVISE)
  96                 return willneed;
  97
  98         ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_MADVISE, &req, sizeof(req));
  99         if (ret)
 100                 return ret;
 101
 102         return req.retained;
 103 }
 104
 105 static uint64_t msm_bo_iova(struct fd_bo *bo)
 106 {
 107         struct drm_msm_gem_info req = {
 108                         .handle = bo->handle,
 109                         .flags = MSM_INFO_IOVA,
 110         };
 111         int ret;
 112
 113         ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_INFO, &req, sizeof(req));
 114         debug_assert(ret == 0);
 115
 116         return req.offset;
 117 }
 118
 119 static void msm_bo_destroy(struct fd_bo *bo)
 120 {
 121         struct msm_bo *msm_bo = to_msm_bo(bo);
 122         free(msm_bo);
 123
 124 }
 125
 126 static const struct fd_bo_funcs funcs = {
 127                 .offset = msm_bo_offset,
 128                 .cpu_prep = msm_bo_cpu_prep,
 129                 .cpu_fini = msm_bo_cpu_fini,
 130                 .madvise = msm_bo_madvise,
 131                 .iova = msm_bo_iova,
 132                 .destroy = msm_bo_destroy,
 133 };
 134
 135 /* allocate a buffer handle: */
 136 int msm_bo_new_handle(struct fd_device *dev,
 137                 uint32_t size, uint32_t flags, uint32_t *handle)
 138 {
 139         struct drm_msm_gem_new req = {
 140                         .size = size,
 141                         .flags = MSM_BO_WC,  // TODO figure out proper flags..
 142         };
 143         int ret;
 144
 145         ret = drmCommandWriteRead(dev->fd, DRM_MSM_GEM_NEW,
 146                         &req, sizeof(req));
 147         if (ret)
 148                 return ret;
 149
 150         *handle = req.handle;
 151
 152         return 0;
 153 }
 154
 155 /* allocate a new buffer object */
 156 struct fd_bo * msm_bo_from_handle(struct fd_device *dev,
 157                 uint32_t size, uint32_t handle)
 158 {
 159         struct msm_bo *msm_bo;
 160         struct fd_bo *bo;
 161
 162         msm_bo = calloc(1, sizeof(*msm_bo));
 163         if (!msm_bo)
 164                 return NULL;
 165
 166         bo = &msm_bo->base;
 167         bo->funcs = &funcs;
 168
 169         return bo;
 170 }