1 /* $NetBSD: qxl_ioctl.c,v 1.3 2021/12/18 23:45:42 riastradh Exp $ */ 2 3 /* 4 * Copyright 2013 Red Hat Inc. 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 shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Dave Airlie 25 * Alon Levy 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: qxl_ioctl.c,v 1.3 2021/12/18 23:45:42 riastradh Exp $"); 30 31 #include <linux/pci.h> 32 #include <linux/uaccess.h> 33 34 #include "qxl_drv.h" 35 #include "qxl_object.h" 36 37 /* 38 * TODO: allocating a new gem(in qxl_bo) for each request. 39 * This is wasteful since bo's are page aligned. 40 */ 41 static int qxl_alloc_ioctl(struct drm_device *dev, void *data, 42 struct drm_file *file_priv) 43 { 44 struct qxl_device *qdev = dev->dev_private; 45 struct drm_qxl_alloc *qxl_alloc = data; 46 int ret; 47 struct qxl_bo *qobj; 48 uint32_t handle; 49 u32 domain = QXL_GEM_DOMAIN_VRAM; 50 51 if (qxl_alloc->size == 0) { 52 DRM_ERROR("invalid size %d\n", qxl_alloc->size); 53 return -EINVAL; 54 } 55 ret = qxl_gem_object_create_with_handle(qdev, file_priv, 56 domain, 57 qxl_alloc->size, 58 NULL, 59 &qobj, &handle); 60 if (ret) { 61 DRM_ERROR("%s: failed to create gem ret=%d\n", 62 __func__, ret); 63 return -ENOMEM; 64 } 65 qxl_alloc->handle = handle; 66 return 0; 67 } 68 69 static int qxl_map_ioctl(struct drm_device *dev, void *data, 70 struct drm_file *file_priv) 71 { 72 struct qxl_device *qdev = dev->dev_private; 73 struct drm_qxl_map *qxl_map = data; 74 75 return qxl_mode_dumb_mmap(file_priv, &qdev->ddev, qxl_map->handle, 76 &qxl_map->offset); 77 } 78 79 struct qxl_reloc_info { 80 int type; 81 struct qxl_bo *dst_bo; 82 uint32_t dst_offset; 83 struct qxl_bo *src_bo; 84 int src_offset; 85 }; 86 87 /* 88 * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's 89 * are on vram). 90 * *(dst + dst_off) = qxl_bo_physical_address(src, src_off) 91 */ 92 static void 93 apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info) 94 { 95 void *reloc_page; 96 97 reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK); 98 *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev, 99 info->src_bo, 100 info->src_offset); 101 qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page); 102 } 103 104 static void 105 apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info) 106 { 107 uint32_t id = 0; 108 void *reloc_page; 109 110 if (info->src_bo && !info->src_bo->is_primary) 111 id = info->src_bo->surface_id; 112 113 reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK); 114 *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id; 115 qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page); 116 } 117 118 /* return holding the reference to this object */ 119 static int qxlhw_handle_to_bo(struct drm_file *file_priv, uint64_t handle, 120 struct qxl_release *release, struct qxl_bo **qbo_p) 121 { 122 struct drm_gem_object *gobj; 123 struct qxl_bo *qobj; 124 int ret; 125 126 gobj = drm_gem_object_lookup(file_priv, handle); 127 if (!gobj) 128 return -EINVAL; 129 130 qobj = gem_to_qxl_bo(gobj); 131 132 ret = qxl_release_list_add(release, qobj); 133 drm_gem_object_put_unlocked(gobj); 134 if (ret) 135 return ret; 136 137 *qbo_p = qobj; 138 return 0; 139 } 140 141 /* 142 * Usage of execbuffer: 143 * Relocations need to take into account the full QXLDrawable size. 144 * However, the command as passed from user space must *not* contain the initial 145 * QXLReleaseInfo struct (first XXX bytes) 146 */ 147 static int qxl_process_single_command(struct qxl_device *qdev, 148 struct drm_qxl_command *cmd, 149 struct drm_file *file_priv) 150 { 151 struct qxl_reloc_info *reloc_info; 152 int release_type; 153 struct qxl_release *release; 154 struct qxl_bo *cmd_bo; 155 void *fb_cmd; 156 int i, ret, num_relocs; 157 int unwritten; 158 159 switch (cmd->type) { 160 case QXL_CMD_DRAW: 161 release_type = QXL_RELEASE_DRAWABLE; 162 break; 163 case QXL_CMD_SURFACE: 164 case QXL_CMD_CURSOR: 165 default: 166 DRM_DEBUG("Only draw commands in execbuffers\n"); 167 return -EINVAL; 168 break; 169 } 170 171 if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info)) 172 return -EINVAL; 173 174 if (!access_ok(u64_to_user_ptr(cmd->command), 175 cmd->command_size)) 176 return -EFAULT; 177 178 reloc_info = kmalloc_array(cmd->relocs_num, 179 sizeof(struct qxl_reloc_info), GFP_KERNEL); 180 if (!reloc_info) 181 return -ENOMEM; 182 183 ret = qxl_alloc_release_reserved(qdev, 184 sizeof(union qxl_release_info) + 185 cmd->command_size, 186 release_type, 187 &release, 188 &cmd_bo); 189 if (ret) 190 goto out_free_reloc; 191 192 /* TODO copy slow path code from i915 */ 193 fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK)); 194 unwritten = __copy_from_user_inatomic_nocache 195 (fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK), 196 u64_to_user_ptr(cmd->command), cmd->command_size); 197 198 { 199 struct qxl_drawable *draw = fb_cmd; 200 201 draw->mm_time = qdev->rom->mm_clock; 202 } 203 204 qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd); 205 if (unwritten) { 206 DRM_ERROR("got unwritten %d\n", unwritten); 207 ret = -EFAULT; 208 goto out_free_release; 209 } 210 211 /* fill out reloc info structs */ 212 num_relocs = 0; 213 for (i = 0; i < cmd->relocs_num; ++i) { 214 struct drm_qxl_reloc reloc; 215 struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs); 216 217 if (copy_from_user(&reloc, u + i, sizeof(reloc))) { 218 ret = -EFAULT; 219 goto out_free_bos; 220 } 221 222 /* add the bos to the list of bos to validate - 223 need to validate first then process relocs? */ 224 if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) { 225 DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type); 226 227 ret = -EINVAL; 228 goto out_free_bos; 229 } 230 reloc_info[i].type = reloc.reloc_type; 231 232 if (reloc.dst_handle) { 233 ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release, 234 &reloc_info[i].dst_bo); 235 if (ret) 236 goto out_free_bos; 237 reloc_info[i].dst_offset = reloc.dst_offset; 238 } else { 239 reloc_info[i].dst_bo = cmd_bo; 240 reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset; 241 } 242 num_relocs++; 243 244 /* reserve and validate the reloc dst bo */ 245 if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) { 246 ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release, 247 &reloc_info[i].src_bo); 248 if (ret) 249 goto out_free_bos; 250 reloc_info[i].src_offset = reloc.src_offset; 251 } else { 252 reloc_info[i].src_bo = NULL; 253 reloc_info[i].src_offset = 0; 254 } 255 } 256 257 /* validate all buffers */ 258 ret = qxl_release_reserve_list(release, false); 259 if (ret) 260 goto out_free_bos; 261 262 for (i = 0; i < cmd->relocs_num; ++i) { 263 if (reloc_info[i].type == QXL_RELOC_TYPE_BO) 264 apply_reloc(qdev, &reloc_info[i]); 265 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF) 266 apply_surf_reloc(qdev, &reloc_info[i]); 267 } 268 269 ret = qxl_push_command_ring_release(qdev, release, cmd->type, true); 270 if (ret) 271 qxl_release_backoff_reserve_list(release); 272 else 273 qxl_release_fence_buffer_objects(release); 274 275 out_free_bos: 276 out_free_release: 277 if (ret) 278 qxl_release_free(qdev, release); 279 out_free_reloc: 280 kfree(reloc_info); 281 return ret; 282 } 283 284 static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data, 285 struct drm_file *file_priv) 286 { 287 struct qxl_device *qdev = dev->dev_private; 288 struct drm_qxl_execbuffer *execbuffer = data; 289 struct drm_qxl_command user_cmd; 290 int cmd_num; 291 int ret; 292 293 for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) { 294 295 struct drm_qxl_command __user *commands = 296 u64_to_user_ptr(execbuffer->commands); 297 298 if (copy_from_user(&user_cmd, commands + cmd_num, 299 sizeof(user_cmd))) 300 return -EFAULT; 301 302 ret = qxl_process_single_command(qdev, &user_cmd, file_priv); 303 if (ret) 304 return ret; 305 } 306 return 0; 307 } 308 309 static int qxl_update_area_ioctl(struct drm_device *dev, void *data, 310 struct drm_file *file) 311 { 312 struct qxl_device *qdev = dev->dev_private; 313 struct drm_qxl_update_area *update_area = data; 314 struct qxl_rect area = {.left = update_area->left, 315 .top = update_area->top, 316 .right = update_area->right, 317 .bottom = update_area->bottom}; 318 int ret; 319 struct drm_gem_object *gobj = NULL; 320 struct qxl_bo *qobj = NULL; 321 struct ttm_operation_ctx ctx = { true, false }; 322 323 if (update_area->left >= update_area->right || 324 update_area->top >= update_area->bottom) 325 return -EINVAL; 326 327 gobj = drm_gem_object_lookup(file, update_area->handle); 328 if (gobj == NULL) 329 return -ENOENT; 330 331 qobj = gem_to_qxl_bo(gobj); 332 333 ret = qxl_bo_reserve(qobj, false); 334 if (ret) 335 goto out; 336 337 if (!qobj->pin_count) { 338 qxl_ttm_placement_from_domain(qobj, qobj->type, false); 339 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx); 340 if (unlikely(ret)) 341 goto out; 342 } 343 344 ret = qxl_bo_check_id(qdev, qobj); 345 if (ret) 346 goto out2; 347 if (!qobj->surface_id) 348 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle); 349 ret = qxl_io_update_area(qdev, qobj, &area); 350 351 out2: 352 qxl_bo_unreserve(qobj); 353 354 out: 355 drm_gem_object_put_unlocked(gobj); 356 return ret; 357 } 358 359 static int qxl_getparam_ioctl(struct drm_device *dev, void *data, 360 struct drm_file *file_priv) 361 { 362 struct qxl_device *qdev = dev->dev_private; 363 struct drm_qxl_getparam *param = data; 364 365 switch (param->param) { 366 case QXL_PARAM_NUM_SURFACES: 367 param->value = qdev->rom->n_surfaces; 368 break; 369 case QXL_PARAM_MAX_RELOCS: 370 param->value = QXL_MAX_RES; 371 break; 372 default: 373 return -EINVAL; 374 } 375 return 0; 376 } 377 378 static int qxl_clientcap_ioctl(struct drm_device *dev, void *data, 379 struct drm_file *file_priv) 380 { 381 struct qxl_device *qdev = dev->dev_private; 382 struct drm_qxl_clientcap *param = data; 383 int byte, idx; 384 385 byte = param->index / 8; 386 idx = param->index % 8; 387 388 if (dev->pdev->revision < 4) 389 return -ENOSYS; 390 391 if (byte >= 58) 392 return -ENOSYS; 393 394 if (qdev->rom->client_capabilities[byte] & (1 << idx)) 395 return 0; 396 return -ENOSYS; 397 } 398 399 static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data, 400 struct drm_file *file) 401 { 402 struct qxl_device *qdev = dev->dev_private; 403 struct drm_qxl_alloc_surf *param = data; 404 struct qxl_bo *qobj; 405 int handle; 406 int ret; 407 int size, actual_stride; 408 struct qxl_surface surf; 409 410 /* work out size allocate bo with handle */ 411 actual_stride = param->stride < 0 ? -param->stride : param->stride; 412 size = actual_stride * param->height + actual_stride; 413 414 surf.format = param->format; 415 surf.width = param->width; 416 surf.height = param->height; 417 surf.stride = param->stride; 418 surf.data = 0; 419 420 ret = qxl_gem_object_create_with_handle(qdev, file, 421 QXL_GEM_DOMAIN_SURFACE, 422 size, 423 &surf, 424 &qobj, &handle); 425 if (ret) { 426 DRM_ERROR("%s: failed to create gem ret=%d\n", 427 __func__, ret); 428 return -ENOMEM; 429 } else 430 param->handle = handle; 431 return ret; 432 } 433 434 const struct drm_ioctl_desc qxl_ioctls[] = { 435 DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH), 436 437 DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH), 438 439 DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl, 440 DRM_AUTH), 441 DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl, 442 DRM_AUTH), 443 DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl, 444 DRM_AUTH), 445 DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl, 446 DRM_AUTH), 447 448 DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl, 449 DRM_AUTH), 450 }; 451 452 int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls); 453
Indexes created Tue Sep 23 02:09:52 GMT 2025