1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */ 2 3 /* 4 * Copyright (C) 2013 Rob Clark <robclark (at) 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 (at) 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 } 171
