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                                 .info = MSM_INFO_GET_OFFSET,
  36                 };
  37                 int ret;
  38
  39                 /* if the buffer is already backed by pages then this
  40                  * doesn't actually do anything (other than giving us
  41                  * the offset)
  42                  */
  43                 ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_INFO,
  44                                 &req, sizeof(req));
  45                 if (ret) {
  46                         ERROR_MSG("alloc failed: %s", strerror(errno));
  47                         return ret;
  48                 }
  49
  50                 msm_bo->offset = req.value;
  51         }
  52
  53         return 0;
  54 }
  55
  56 static int msm_bo_offset(struct fd_bo *bo, uint64_t *offset)
  57 {
  58         struct msm_bo *msm_bo = to_msm_bo(bo);
  59         int ret = bo_allocate(msm_bo);
  60         if (ret)
  61                 return ret;
  62         *offset = msm_bo->offset;
  63         return 0;
  64 }
  65
  66 static int msm_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
  67 {
  68         struct drm_msm_gem_cpu_prep req = {
  69                         .handle = bo->handle,
  70                         .op = op,
  71         };
  72
  73         get_abs_timeout(&req.timeout, 5000000000);
  74
  75         return drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_PREP, &req, sizeof(req));
  76 }
  77
  78 static void msm_bo_cpu_fini(struct fd_bo *bo)
  79 {
  80         struct drm_msm_gem_cpu_fini req = {
  81                         .handle = bo->handle,
  82         };
  83
  84         drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_FINI, &req, sizeof(req));
  85 }
  86
  87 static int msm_bo_madvise(struct fd_bo *bo, int willneed)
  88 {
  89         struct drm_msm_gem_madvise req = {
  90                         .handle = bo->handle,
  91                         .madv = willneed ? MSM_MADV_WILLNEED : MSM_MADV_DONTNEED,
  92         };
  93         int ret;
  94
  95         /* older kernels do not support this: */
  96         if (bo->dev->version < FD_VERSION_MADVISE)
  97                 return willneed;
  98
  99         ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_MADVISE, &req, sizeof(req));
 100         if (ret)
 101                 return ret;
 102
 103         return req.retained;
 104 }
 105
 106 static uint64_t msm_bo_iova(struct fd_bo *bo)
 107 {
 108         struct drm_msm_gem_info req = {
 109                         .handle = bo->handle,
 110                         .info = MSM_INFO_GET_IOVA,
 111         };
 112         int ret;
 113
 114         ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_INFO, &req, sizeof(req));
 115         if (ret)
 116                 return 0;
 117
 118         return req.value;
 119 }
 120
 121 static void msm_bo_set_name(struct fd_bo *bo, const char *fmt, va_list ap)
 122 {
 123         struct drm_msm_gem_info req = {
 124                         .handle = bo->handle,
 125                         .info = MSM_INFO_SET_NAME,
 126         };
 127         char buf[32];
 128         int sz;
 129
 130         if (bo->dev->version < FD_VERSION_SOFTPIN)
 131                 return;
 132
 133         sz = vsnprintf(buf, sizeof(buf), fmt, ap);
 134
 135         req.value = VOID2U64(buf);
 136         req.len = MIN2(sz, sizeof(buf));
 137
 138         drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_INFO, &req, sizeof(req));
 139 }
 140
 141 static void msm_bo_destroy(struct fd_bo *bo)
 142 {
 143         struct msm_bo *msm_bo = to_msm_bo(bo);
 144         free(msm_bo);
 145 }
 146
 147 static const struct fd_bo_funcs funcs = {
 148                 .offset = msm_bo_offset,
 149                 .cpu_prep = msm_bo_cpu_prep,
 150                 .cpu_fini = msm_bo_cpu_fini,
 151                 .madvise = msm_bo_madvise,
 152                 .iova = msm_bo_iova,
 153                 .set_name = msm_bo_set_name,
 154                 .destroy = msm_bo_destroy,
 155 };
 156
 157 /* allocate a buffer handle: */
 158 int msm_bo_new_handle(struct fd_device *dev,
 159                 uint32_t size, uint32_t flags, uint32_t *handle)
 160 {
 161         struct drm_msm_gem_new req = {
 162                         .size = size,
 163                         .flags = MSM_BO_WC,  // TODO figure out proper flags..
 164         };
 165         int ret;
 166
 167         if (flags & DRM_FREEDRENO_GEM_SCANOUT)
 168                 req.flags |= MSM_BO_SCANOUT;
 169
 170         if (flags & DRM_FREEDRENO_GEM_GPUREADONLY)
 171                 req.flags |= MSM_BO_GPU_READONLY;
 172
 173         ret = drmCommandWriteRead(dev->fd, DRM_MSM_GEM_NEW,
 174                         &req, sizeof(req));
 175         if (ret)
 176                 return ret;
 177
 178         *handle = req.handle;
 179
 180         return 0;
 181 }
 182
 183 /* allocate a new buffer object */
 184 struct fd_bo * msm_bo_from_handle(struct fd_device *dev,
 185                 uint32_t size, uint32_t handle)
 186 {
 187         struct msm_bo *msm_bo;
 188         struct fd_bo *bo;
 189
 190         msm_bo = calloc(1, sizeof(*msm_bo));
 191         if (!msm_bo)
 192                 return NULL;
 193
 194         bo = &msm_bo->base;
 195         bo->funcs = &funcs;
 196
 197         return bo;
 198 }