freedreno/msm/msm_bo.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Authors:
  26  *    Rob Clark <robclark@freedesktop.org>
  27  */
  28
  29 #include "msm_priv.h"
  30
  31 static int bo_allocate(struct msm_bo *msm_bo)
  32 {
  33         struct fd_bo *bo = &msm_bo->base;
  34         if (!msm_bo->offset) {
  35                 struct drm_msm_gem_info req = {
  36                                 .handle = bo->handle,
  37                 };
  38                 int ret;
  39
  40                 /* if the buffer is already backed by pages then this
  41                  * doesn't actually do anything (other than giving us
  42                  * the offset)
  43                  */
  44                 ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_INFO,
  45                                 &req, sizeof(req));
  46                 if (ret) {
  47                         ERROR_MSG("alloc failed: %s", strerror(errno));
  48                         return ret;
  49                 }
  50
  51                 msm_bo->offset = req.offset;
  52         }
  53
  54         return 0;
  55 }
  56
  57 static int msm_bo_offset(struct fd_bo *bo, uint64_t *offset)
  58 {
  59         struct msm_bo *msm_bo = to_msm_bo(bo);
  60         int ret = bo_allocate(msm_bo);
  61         if (ret)
  62                 return ret;
  63         *offset = msm_bo->offset;
  64         return 0;
  65 }
  66
  67 static int msm_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
  68 {
  69         struct drm_msm_gem_cpu_prep req = {
  70                         .handle = bo->handle,
  71                         .op = op,
  72         };
  73
  74         get_abs_timeout(&req.timeout, 5000000000);
  75
  76         return drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_PREP, &req, sizeof(req));
  77 }
  78
  79 static void msm_bo_cpu_fini(struct fd_bo *bo)
  80 {
  81         struct drm_msm_gem_cpu_fini req = {
  82                         .handle = bo->handle,
  83         };
  84
  85         drmCommandWrite(bo->dev->fd, DRM_MSM_GEM_CPU_FINI, &req, sizeof(req));
  86 }
  87
  88 static int msm_bo_madvise(struct fd_bo *bo, int willneed)
  89 {
  90         struct drm_msm_gem_madvise req = {
  91                         .handle = bo->handle,
  92                         .madv = willneed ? MSM_MADV_WILLNEED : MSM_MADV_DONTNEED,
  93         };
  94         int ret;
  95
  96         /* older kernels do not support this: */
  97         if (bo->dev->version < FD_VERSION_MADVISE)
  98                 return willneed;
  99
 100         ret = drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_MADVISE, &req, sizeof(req));
 101         if (ret)
 102                 return ret;
 103
 104         return req.retained;
 105 }
 106
 107 static uint64_t msm_bo_iova(struct fd_bo *bo)
 108 {
 109         struct drm_msm_gem_info req = {
 110                         .handle = bo->handle,
 111                         .flags = MSM_INFO_IOVA,
 112         };
 113
 114         drmCommandWriteRead(bo->dev->fd, DRM_MSM_GEM_INFO, &req, sizeof(req));
 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 drm_private 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 drm_private 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 }