1 /* 2 * Copyright 2013 Red Hat Inc. 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 shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Dave Airlie 23 * Alon Levy 24 */ 25 26 #include <linux/pci.h> 27 #include <linux/uaccess.h> 28 29 #include "qxl_drv.h" 30 #include "qxl_object.h" 31 32 /* 33 * TODO: allocating a new gem(in qxl_bo) for each request. 34 * This is wasteful since bo's are page aligned. 35 */ 36 static int qxl_alloc_ioctl(struct drm_device *dev, void *data, 37 struct drm_file *file_priv) 38 { 39 struct qxl_device *qdev = dev->dev_private; 40 struct drm_qxl_alloc *qxl_alloc = data; 41 int ret; 42 struct qxl_bo *qobj; 43 uint32_t handle; 44 u32 domain = QXL_GEM_DOMAIN_VRAM; 45 46 if (qxl_alloc->size == 0) { 47 DRM_ERROR("invalid size %d\n", qxl_alloc->size); 48 return -EINVAL; 49 } 50 ret = qxl_gem_object_create_with_handle(qdev, file_priv, 51 domain, 52 qxl_alloc->size, 53 NULL, 54 &qobj, &handle); 55 if (ret) { 56 DRM_ERROR("%s: failed to create gem ret=%d\n", 57 __func__, ret); 58 return -ENOMEM; 59 } 60 qxl_alloc->handle = handle; 61 return 0; 62 } 63 64 static int qxl_map_ioctl(struct drm_device *dev, void *data, 65 struct drm_file *file_priv) 66 { 67 struct qxl_device *qdev = dev->dev_private; 68 struct drm_qxl_map *qxl_map = data; 69 70 return qxl_mode_dumb_mmap(file_priv, &qdev->ddev, qxl_map->handle, 71 &qxl_map->offset); 72 } 73 74 struct qxl_reloc_info { 75 int type; 76 struct qxl_bo *dst_bo; 77 uint32_t dst_offset; 78 struct qxl_bo *src_bo; 79 int src_offset; 80 }; 81 82 /* 83 * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's 84 * are on vram). 85 * *(dst + dst_off) = qxl_bo_physical_address(src, src_off) 86 */ 87 static void 88 apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info) 89 { 90 void *reloc_page; 91 92 reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK); 93 *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev, 94 info->src_bo, 95 info->src_offset); 96 qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page); 97 } 98 99 static void 100 apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info) 101 { 102 uint32_t id = 0; 103 void *reloc_page; 104 105 if (info->src_bo && !info->src_bo->is_primary) 106 id = info->src_bo->surface_id; 107 108 reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK); 109 *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id; 110 qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page); 111 } 112 113 /* return holding the reference to this object */ 114 static int qxlhw_handle_to_bo(struct drm_file *file_priv, uint64_t handle, 115 struct qxl_release *release, struct qxl_bo **qbo_p) 116 { 117 struct drm_gem_object *gobj; 118 struct qxl_bo *qobj; 119 int ret; 120 121 gobj = drm_gem_object_lookup(file_priv, handle); 122 if (!gobj) 123 return -EINVAL; 124 125 qobj = gem_to_qxl_bo(gobj); 126 127 ret = qxl_release_list_add(release, qobj); 128 drm_gem_object_put_unlocked(gobj); 129 if (ret) 130 return ret; 131 132 *qbo_p = qobj; 133 return 0; 134 } 135 136 /* 137 * Usage of execbuffer: 138 * Relocations need to take into account the full QXLDrawable size. 139 * However, the command as passed from user space must *not* contain the initial 140 * QXLReleaseInfo struct (first XXX bytes) 141 */ 142 static int qxl_process_single_command(struct qxl_device *qdev, 143 struct drm_qxl_command *cmd, 144 struct drm_file *file_priv) 145 { 146 struct qxl_reloc_info *reloc_info; 147 int release_type; 148 struct qxl_release *release; 149 struct qxl_bo *cmd_bo; 150 void *fb_cmd; 151 int i, ret, num_relocs; 152 int unwritten; 153 154 switch (cmd->type) { 155 case QXL_CMD_DRAW: 156 release_type = QXL_RELEASE_DRAWABLE; 157 break; 158 case QXL_CMD_SURFACE: 159 case QXL_CMD_CURSOR: 160 default: 161 DRM_DEBUG("Only draw commands in execbuffers\n"); 162 return -EINVAL; 163 break; 164 } 165 166 if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info)) 167 return -EINVAL; 168 169 if (!access_ok(u64_to_user_ptr(cmd->command), 170 cmd->command_size)) 171 return -EFAULT; 172 173 reloc_info = kmalloc_array(cmd->relocs_num, 174 sizeof(struct qxl_reloc_info), GFP_KERNEL); 175 if (!reloc_info) 176 return -ENOMEM; 177 178 ret = qxl_alloc_release_reserved(qdev, 179 sizeof(union qxl_release_info) + 180 cmd->command_size, 181 release_type, 182 &release, 183 &cmd_bo); 184 if (ret) 185 goto out_free_reloc; 186 187 /* TODO copy slow path code from i915 */ 188 fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK)); 189 unwritten = __copy_from_user_inatomic_nocache 190 (fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK), 191 u64_to_user_ptr(cmd->command), cmd->command_size); 192 193 { 194 struct qxl_drawable *draw = fb_cmd; 195 196 draw->mm_time = qdev->rom->mm_clock; 197 } 198 199 qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd); 200 if (unwritten) { 201 DRM_ERROR("got unwritten %d\n", unwritten); 202 ret = -EFAULT; 203 goto out_free_release; 204 } 205 206 /* fill out reloc info structs */ 207 num_relocs = 0; 208 for (i = 0; i < cmd->relocs_num; ++i) { 209 struct drm_qxl_reloc reloc; 210 struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs); 211 212 if (copy_from_user(&reloc, u + i, sizeof(reloc))) { 213 ret = -EFAULT; 214 goto out_free_bos; 215 } 216 217 /* add the bos to the list of bos to validate - 218 need to validate first then process relocs? */ 219 if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) { 220 DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type); 221 222 ret = -EINVAL; 223 goto out_free_bos; 224 } 225 reloc_info[i].type = reloc.reloc_type; 226 227 if (reloc.dst_handle) { 228 ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release, 229 &reloc_info[i].dst_bo); 230 if (ret) 231 goto out_free_bos; 232 reloc_info[i].dst_offset = reloc.dst_offset; 233 } else { 234 reloc_info[i].dst_bo = cmd_bo; 235 reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset; 236 } 237 num_relocs++; 238 239 /* reserve and validate the reloc dst bo */ 240 if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) { 241 ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release, 242 &reloc_info[i].src_bo); 243 if (ret) 244 goto out_free_bos; 245 reloc_info[i].src_offset = reloc.src_offset; 246 } else { 247 reloc_info[i].src_bo = NULL; 248 reloc_info[i].src_offset = 0; 249 } 250 } 251 252 /* validate all buffers */ 253 ret = qxl_release_reserve_list(release, false); 254 if (ret) 255 goto out_free_bos; 256 257 for (i = 0; i < cmd->relocs_num; ++i) { 258 if (reloc_info[i].type == QXL_RELOC_TYPE_BO) 259 apply_reloc(qdev, &reloc_info[i]); 260 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF) 261 apply_surf_reloc(qdev, &reloc_info[i]); 262 } 263 264 ret = qxl_push_command_ring_release(qdev, release, cmd->type, true); 265 if (ret) 266 qxl_release_backoff_reserve_list(release); 267 else 268 qxl_release_fence_buffer_objects(release); 269 270 out_free_bos: 271 out_free_release: 272 if (ret) 273 qxl_release_free(qdev, release); 274 out_free_reloc: 275 kfree(reloc_info); 276 return ret; 277 } 278 279 static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data, 280 struct drm_file *file_priv) 281 { 282 struct qxl_device *qdev = dev->dev_private; 283 struct drm_qxl_execbuffer *execbuffer = data; 284 struct drm_qxl_command user_cmd; 285 int cmd_num; 286 int ret; 287 288 for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) { 289 290 struct drm_qxl_command __user *commands = 291 u64_to_user_ptr(execbuffer->commands); 292 293 if (copy_from_user(&user_cmd, commands + cmd_num, 294 sizeof(user_cmd))) 295 return -EFAULT; 296 297 ret = qxl_process_single_command(qdev, &user_cmd, file_priv); 298 if (ret) 299 return ret; 300 } 301 return 0; 302 } 303 304 static int qxl_update_area_ioctl(struct drm_device *dev, void *data, 305 struct drm_file *file) 306 { 307 struct qxl_device *qdev = dev->dev_private; 308 struct drm_qxl_update_area *update_area = data; 309 struct qxl_rect area = {.left = update_area->left, 310 .top = update_area->top, 311 .right = update_area->right, 312 .bottom = update_area->bottom}; 313 int ret; 314 struct drm_gem_object *gobj = NULL; 315 struct qxl_bo *qobj = NULL; 316 struct ttm_operation_ctx ctx = { true, false }; 317 318 if (update_area->left >= update_area->right || 319 update_area->top >= update_area->bottom) 320 return -EINVAL; 321 322 gobj = drm_gem_object_lookup(file, update_area->handle); 323 if (gobj == NULL) 324 return -ENOENT; 325 326 qobj = gem_to_qxl_bo(gobj); 327 328 ret = qxl_bo_reserve(qobj, false); 329 if (ret) 330 goto out; 331 332 if (!qobj->pin_count) { 333 qxl_ttm_placement_from_domain(qobj, qobj->type, false); 334 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx); 335 if (unlikely(ret)) 336 goto out; 337 } 338 339 ret = qxl_bo_check_id(qdev, qobj); 340 if (ret) 341 goto out2; 342 if (!qobj->surface_id) 343 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle); 344 ret = qxl_io_update_area(qdev, qobj, &area); 345 346 out2: 347 qxl_bo_unreserve(qobj); 348 349 out: 350 drm_gem_object_put_unlocked(gobj); 351 return ret; 352 } 353 354 static int qxl_getparam_ioctl(struct drm_device *dev, void *data, 355 struct drm_file *file_priv) 356 { 357 struct qxl_device *qdev = dev->dev_private; 358 struct drm_qxl_getparam *param = data; 359 360 switch (param->param) { 361 case QXL_PARAM_NUM_SURFACES: 362 param->value = qdev->rom->n_surfaces; 363 break; 364 case QXL_PARAM_MAX_RELOCS: 365 param->value = QXL_MAX_RES; 366 break; 367 default: 368 return -EINVAL; 369 } 370 return 0; 371 } 372 373 static int qxl_clientcap_ioctl(struct drm_device *dev, void *data, 374 struct drm_file *file_priv) 375 { 376 struct qxl_device *qdev = dev->dev_private; 377 struct drm_qxl_clientcap *param = data; 378 int byte, idx; 379 380 byte = param->index / 8; 381 idx = param->index % 8; 382 383 if (dev->pdev->revision < 4) 384 return -ENOSYS; 385 386 if (byte >= 58) 387 return -ENOSYS; 388 389 if (qdev->rom->client_capabilities[byte] & (1 << idx)) 390 return 0; 391 return -ENOSYS; 392 } 393 394 static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data, 395 struct drm_file *file) 396 { 397 struct qxl_device *qdev = dev->dev_private; 398 struct drm_qxl_alloc_surf *param = data; 399 struct qxl_bo *qobj; 400 int handle; 401 int ret; 402 int size, actual_stride; 403 struct qxl_surface surf; 404 405 /* work out size allocate bo with handle */ 406 actual_stride = param->stride < 0 ? -param->stride : param->stride; 407 size = actual_stride * param->height + actual_stride; 408 409 surf.format = param->format; 410 surf.width = param->width; 411 surf.height = param->height; 412 surf.stride = param->stride; 413 surf.data = 0; 414 415 ret = qxl_gem_object_create_with_handle(qdev, file, 416 QXL_GEM_DOMAIN_SURFACE, 417 size, 418 &surf, 419 &qobj, &handle); 420 if (ret) { 421 DRM_ERROR("%s: failed to create gem ret=%d\n", 422 __func__, ret); 423 return -ENOMEM; 424 } else 425 param->handle = handle; 426 return ret; 427 } 428 429 const struct drm_ioctl_desc qxl_ioctls[] = { 430 DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH), 431 432 DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH), 433 434 DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl, 435 DRM_AUTH), 436 DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl, 437 DRM_AUTH), 438 DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl, 439 DRM_AUTH), 440 DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl, 441 DRM_AUTH), 442 443 DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl, 444 DRM_AUTH), 445 }; 446 447 int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls); 448