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 = to_qxl(dev); 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 = to_qxl(dev); 68 struct drm_qxl_map *qxl_map = data; 69 70 return drm_gem_ttm_dumb_map_offset(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(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 } 164 165 if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info)) 166 return -EINVAL; 167 168 if (!access_ok(u64_to_user_ptr(cmd->command), 169 cmd->command_size)) 170 return -EFAULT; 171 172 reloc_info = kmalloc_array(cmd->relocs_num, 173 sizeof(struct qxl_reloc_info), GFP_KERNEL); 174 if (!reloc_info) 175 return -ENOMEM; 176 177 ret = qxl_alloc_release_reserved(qdev, 178 sizeof(union qxl_release_info) + 179 cmd->command_size, 180 release_type, 181 &release, 182 &cmd_bo); 183 if (ret) 184 goto out_free_reloc; 185 186 /* TODO copy slow path code from i915 */ 187 fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK)); 188 unwritten = __copy_from_user_inatomic_nocache 189 (fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK), 190 u64_to_user_ptr(cmd->command), cmd->command_size); 191 192 { 193 struct qxl_drawable *draw = fb_cmd; 194 195 draw->mm_time = qdev->rom->mm_clock; 196 } 197 198 qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd); 199 if (unwritten) { 200 DRM_ERROR("got unwritten %d\n", unwritten); 201 ret = -EFAULT; 202 goto out_free_release; 203 } 204 205 /* fill out reloc info structs */ 206 num_relocs = 0; 207 for (i = 0; i < cmd->relocs_num; ++i) { 208 struct drm_qxl_reloc reloc; 209 struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs); 210 211 if (copy_from_user(&reloc, u + i, sizeof(reloc))) { 212 ret = -EFAULT; 213 goto out_free_bos; 214 } 215 216 /* add the bos to the list of bos to validate - 217 need to validate first then process relocs? */ 218 if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) { 219 DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type); 220 221 ret = -EINVAL; 222 goto out_free_bos; 223 } 224 reloc_info[i].type = reloc.reloc_type; 225 226 if (reloc.dst_handle) { 227 ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release, 228 &reloc_info[i].dst_bo); 229 if (ret) 230 goto out_free_bos; 231 reloc_info[i].dst_offset = reloc.dst_offset; 232 } else { 233 reloc_info[i].dst_bo = cmd_bo; 234 reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset; 235 } 236 num_relocs++; 237 238 /* reserve and validate the reloc dst bo */ 239 if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) { 240 ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release, 241 &reloc_info[i].src_bo); 242 if (ret) 243 goto out_free_bos; 244 reloc_info[i].src_offset = reloc.src_offset; 245 } else { 246 reloc_info[i].src_bo = NULL; 247 reloc_info[i].src_offset = 0; 248 } 249 } 250 251 /* validate all buffers */ 252 ret = qxl_release_reserve_list(release, false); 253 if (ret) 254 goto out_free_bos; 255 256 for (i = 0; i < cmd->relocs_num; ++i) { 257 if (reloc_info[i].type == QXL_RELOC_TYPE_BO) 258 apply_reloc(qdev, &reloc_info[i]); 259 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF) 260 apply_surf_reloc(qdev, &reloc_info[i]); 261 } 262 263 qxl_release_fence_buffer_objects(release); 264 ret = qxl_push_command_ring_release(qdev, release, cmd->type, true); 265 266 out_free_bos: 267 out_free_release: 268 if (ret) 269 qxl_release_free(qdev, release); 270 out_free_reloc: 271 kfree(reloc_info); 272 return ret; 273 } 274 275 static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data, 276 struct drm_file *file_priv) 277 { 278 struct qxl_device *qdev = to_qxl(dev); 279 struct drm_qxl_execbuffer *execbuffer = data; 280 struct drm_qxl_command user_cmd; 281 int cmd_num; 282 int ret; 283 284 for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) { 285 286 struct drm_qxl_command __user *commands = 287 u64_to_user_ptr(execbuffer->commands); 288 289 if (copy_from_user(&user_cmd, commands + cmd_num, 290 sizeof(user_cmd))) 291 return -EFAULT; 292 293 ret = qxl_process_single_command(qdev, &user_cmd, file_priv); 294 if (ret) 295 return ret; 296 } 297 return 0; 298 } 299 300 static int qxl_update_area_ioctl(struct drm_device *dev, void *data, 301 struct drm_file *file) 302 { 303 struct qxl_device *qdev = to_qxl(dev); 304 struct drm_qxl_update_area *update_area = data; 305 struct qxl_rect area = {.left = update_area->left, 306 .top = update_area->top, 307 .right = update_area->right, 308 .bottom = update_area->bottom}; 309 int ret; 310 struct drm_gem_object *gobj = NULL; 311 struct qxl_bo *qobj = NULL; 312 struct ttm_operation_ctx ctx = { true, false }; 313 314 if (update_area->left >= update_area->right || 315 update_area->top >= update_area->bottom) 316 return -EINVAL; 317 318 gobj = drm_gem_object_lookup(file, update_area->handle); 319 if (gobj == NULL) 320 return -ENOENT; 321 322 qobj = gem_to_qxl_bo(gobj); 323 324 ret = qxl_bo_reserve(qobj); 325 if (ret) 326 goto out; 327 328 if (!qobj->tbo.pin_count) { 329 qxl_ttm_placement_from_domain(qobj, qobj->type); 330 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx); 331 if (unlikely(ret)) 332 goto out; 333 } 334 335 ret = qxl_bo_check_id(qdev, qobj); 336 if (ret) 337 goto out2; 338 if (!qobj->surface_id) 339 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle); 340 ret = qxl_io_update_area(qdev, qobj, &area); 341 342 out2: 343 qxl_bo_unreserve(qobj); 344 345 out: 346 drm_gem_object_put(gobj); 347 return ret; 348 } 349 350 static int qxl_getparam_ioctl(struct drm_device *dev, void *data, 351 struct drm_file *file_priv) 352 { 353 struct qxl_device *qdev = to_qxl(dev); 354 struct drm_qxl_getparam *param = data; 355 356 switch (param->param) { 357 case QXL_PARAM_NUM_SURFACES: 358 param->value = qdev->rom->n_surfaces; 359 break; 360 case QXL_PARAM_MAX_RELOCS: 361 param->value = QXL_MAX_RES; 362 break; 363 default: 364 return -EINVAL; 365 } 366 return 0; 367 } 368 369 static int qxl_clientcap_ioctl(struct drm_device *dev, void *data, 370 struct drm_file *file_priv) 371 { 372 struct qxl_device *qdev = to_qxl(dev); 373 struct pci_dev *pdev = to_pci_dev(dev->dev); 374 struct drm_qxl_clientcap *param = data; 375 int byte, idx; 376 377 byte = param->index / 8; 378 idx = param->index % 8; 379 380 if (pdev->revision < 4) 381 return -ENOSYS; 382 383 if (byte >= 58) 384 return -ENOSYS; 385 386 if (qdev->rom->client_capabilities[byte] & (1 << idx)) 387 return 0; 388 return -ENOSYS; 389 } 390 391 static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data, 392 struct drm_file *file) 393 { 394 struct qxl_device *qdev = to_qxl(dev); 395 struct drm_qxl_alloc_surf *param = data; 396 struct qxl_bo *qobj; 397 int handle; 398 int ret; 399 int size, actual_stride; 400 struct qxl_surface surf; 401 402 /* work out size allocate bo with handle */ 403 actual_stride = param->stride < 0 ? -param->stride : param->stride; 404 size = actual_stride * param->height + actual_stride; 405 406 surf.format = param->format; 407 surf.width = param->width; 408 surf.height = param->height; 409 surf.stride = param->stride; 410 surf.data = 0; 411 412 ret = qxl_gem_object_create_with_handle(qdev, file, 413 QXL_GEM_DOMAIN_SURFACE, 414 size, 415 &surf, 416 &qobj, &handle); 417 if (ret) { 418 DRM_ERROR("%s: failed to create gem ret=%d\n", 419 __func__, ret); 420 return -ENOMEM; 421 } else 422 param->handle = handle; 423 return ret; 424 } 425 426 const struct drm_ioctl_desc qxl_ioctls[] = { 427 DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH), 428 429 DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH), 430 431 DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl, 432 DRM_AUTH), 433 DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl, 434 DRM_AUTH), 435 DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl, 436 DRM_AUTH), 437 DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl, 438 DRM_AUTH), 439 440 DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl, 441 DRM_AUTH), 442 }; 443 444 int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls); 445