1 /* 2 * \file drm_ioc32.c 3 * 4 * 32-bit ioctl compatibility routines for the DRM. 5 * 6 * \author Paul Mackerras <paulus@samba.org> 7 * 8 * Copyright (C) Paul Mackerras 2005. 9 * All Rights Reserved. 10 * 11 * Permission is hereby granted, free of charge, to any person obtaining a 12 * copy of this software and associated documentation files (the "Software"), 13 * to deal in the Software without restriction, including without limitation 14 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 15 * and/or sell copies of the Software, and to permit persons to whom the 16 * Software is furnished to do so, subject to the following conditions: 17 * 18 * The above copyright notice and this permission notice (including the next 19 * paragraph) shall be included in all copies or substantial portions of the 20 * Software. 21 * 22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 25 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 26 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 28 * IN THE SOFTWARE. 29 */ 30 #include <linux/compat.h> 31 #include <linux/ratelimit.h> 32 #include <linux/export.h> 33 34 #include <drm/drm_agpsupport.h> 35 #include <drm/drm_file.h> 36 #include <drm/drm_print.h> 37 38 #include "drm_crtc_internal.h" 39 #include "drm_internal.h" 40 #include "drm_legacy.h" 41 42 #define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t) 43 #define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t) 44 #define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t) 45 #define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t) 46 #define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t) 47 48 #define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t) 49 #define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t) 50 #define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t) 51 #define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t) 52 #define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t) 53 #define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t) 54 #define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t) 55 56 #define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t) 57 58 #define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t) 59 #define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t) 60 61 #define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t) 62 #define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t) 63 64 #define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t) 65 #define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t) 66 #define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t) 67 #define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t) 68 #define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t) 69 #define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t) 70 71 #define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t) 72 #define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t) 73 74 #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t) 75 76 #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t) 77 78 #define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t) 79 80 typedef struct drm_version_32 { 81 int version_major; /* Major version */ 82 int version_minor; /* Minor version */ 83 int version_patchlevel; /* Patch level */ 84 u32 name_len; /* Length of name buffer */ 85 u32 name; /* Name of driver */ 86 u32 date_len; /* Length of date buffer */ 87 u32 date; /* User-space buffer to hold date */ 88 u32 desc_len; /* Length of desc buffer */ 89 u32 desc; /* User-space buffer to hold desc */ 90 } drm_version32_t; 91 compat_drm_version(struct file * file,unsigned int cmd,unsigned long arg)92 static int compat_drm_version(struct file *file, unsigned int cmd, 93 unsigned long arg) 94 { 95 drm_version32_t v32; 96 struct drm_version v; 97 int err; 98 99 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32))) 100 return -EFAULT; 101 102 memset(&v, 0, sizeof(v)); 103 104 v = (struct drm_version) { 105 .name_len = v32.name_len, 106 .name = compat_ptr(v32.name), 107 .date_len = v32.date_len, 108 .date = compat_ptr(v32.date), 109 .desc_len = v32.desc_len, 110 .desc = compat_ptr(v32.desc), 111 }; 112 err = drm_ioctl_kernel(file, drm_version, &v, 113 DRM_RENDER_ALLOW); 114 if (err) 115 return err; 116 117 v32.version_major = v.version_major; 118 v32.version_minor = v.version_minor; 119 v32.version_patchlevel = v.version_patchlevel; 120 v32.name_len = v.name_len; 121 v32.date_len = v.date_len; 122 v32.desc_len = v.desc_len; 123 if (copy_to_user((void __user *)arg, &v32, sizeof(v32))) 124 return -EFAULT; 125 return 0; 126 } 127 128 typedef struct drm_unique32 { 129 u32 unique_len; /* Length of unique */ 130 u32 unique; /* Unique name for driver instantiation */ 131 } drm_unique32_t; 132 compat_drm_getunique(struct file * file,unsigned int cmd,unsigned long arg)133 static int compat_drm_getunique(struct file *file, unsigned int cmd, 134 unsigned long arg) 135 { 136 drm_unique32_t uq32; 137 struct drm_unique uq; 138 int err; 139 140 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32))) 141 return -EFAULT; 142 143 memset(&uq, 0, sizeof(uq)); 144 145 uq = (struct drm_unique){ 146 .unique_len = uq32.unique_len, 147 .unique = compat_ptr(uq32.unique), 148 }; 149 150 err = drm_ioctl_kernel(file, drm_getunique, &uq, 0); 151 if (err) 152 return err; 153 154 uq32.unique_len = uq.unique_len; 155 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32))) 156 return -EFAULT; 157 return 0; 158 } 159 compat_drm_setunique(struct file * file,unsigned int cmd,unsigned long arg)160 static int compat_drm_setunique(struct file *file, unsigned int cmd, 161 unsigned long arg) 162 { 163 /* it's dead */ 164 return -EINVAL; 165 } 166 167 #if IS_ENABLED(CONFIG_DRM_LEGACY) 168 typedef struct drm_map32 { 169 u32 offset; /* Requested physical address (0 for SAREA) */ 170 u32 size; /* Requested physical size (bytes) */ 171 enum drm_map_type type; /* Type of memory to map */ 172 enum drm_map_flags flags; /* Flags */ 173 u32 handle; /* User-space: "Handle" to pass to mmap() */ 174 int mtrr; /* MTRR slot used */ 175 } drm_map32_t; 176 compat_drm_getmap(struct file * file,unsigned int cmd,unsigned long arg)177 static int compat_drm_getmap(struct file *file, unsigned int cmd, 178 unsigned long arg) 179 { 180 drm_map32_t __user *argp = (void __user *)arg; 181 drm_map32_t m32; 182 struct drm_map map; 183 int err; 184 185 if (copy_from_user(&m32, argp, sizeof(m32))) 186 return -EFAULT; 187 188 map.offset = m32.offset; 189 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, 0); 190 if (err) 191 return err; 192 193 m32.offset = map.offset; 194 m32.size = map.size; 195 m32.type = map.type; 196 m32.flags = map.flags; 197 m32.handle = ptr_to_compat((void __user *)map.handle); 198 m32.mtrr = map.mtrr; 199 if (copy_to_user(argp, &m32, sizeof(m32))) 200 return -EFAULT; 201 return 0; 202 203 } 204 compat_drm_addmap(struct file * file,unsigned int cmd,unsigned long arg)205 static int compat_drm_addmap(struct file *file, unsigned int cmd, 206 unsigned long arg) 207 { 208 drm_map32_t __user *argp = (void __user *)arg; 209 drm_map32_t m32; 210 struct drm_map map; 211 int err; 212 213 if (copy_from_user(&m32, argp, sizeof(m32))) 214 return -EFAULT; 215 216 map.offset = m32.offset; 217 map.size = m32.size; 218 map.type = m32.type; 219 map.flags = m32.flags; 220 221 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map, 222 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 223 if (err) 224 return err; 225 226 m32.offset = map.offset; 227 m32.mtrr = map.mtrr; 228 m32.handle = ptr_to_compat((void __user *)map.handle); 229 if (map.handle != compat_ptr(m32.handle)) 230 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n", 231 map.handle, m32.type, m32.offset); 232 233 if (copy_to_user(argp, &m32, sizeof(m32))) 234 return -EFAULT; 235 236 return 0; 237 } 238 compat_drm_rmmap(struct file * file,unsigned int cmd,unsigned long arg)239 static int compat_drm_rmmap(struct file *file, unsigned int cmd, 240 unsigned long arg) 241 { 242 drm_map32_t __user *argp = (void __user *)arg; 243 struct drm_map map; 244 u32 handle; 245 246 if (get_user(handle, &argp->handle)) 247 return -EFAULT; 248 map.handle = compat_ptr(handle); 249 return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH); 250 } 251 #endif 252 253 typedef struct drm_client32 { 254 int idx; /* Which client desired? */ 255 int auth; /* Is client authenticated? */ 256 u32 pid; /* Process ID */ 257 u32 uid; /* User ID */ 258 u32 magic; /* Magic */ 259 u32 iocs; /* Ioctl count */ 260 } drm_client32_t; 261 compat_drm_getclient(struct file * file,unsigned int cmd,unsigned long arg)262 static int compat_drm_getclient(struct file *file, unsigned int cmd, 263 unsigned long arg) 264 { 265 drm_client32_t c32; 266 drm_client32_t __user *argp = (void __user *)arg; 267 struct drm_client client; 268 int err; 269 270 if (copy_from_user(&c32, argp, sizeof(c32))) 271 return -EFAULT; 272 273 memset(&client, 0, sizeof(client)); 274 275 client.idx = c32.idx; 276 277 err = drm_ioctl_kernel(file, drm_getclient, &client, 0); 278 if (err) 279 return err; 280 281 c32.idx = client.idx; 282 c32.auth = client.auth; 283 c32.pid = client.pid; 284 c32.uid = client.uid; 285 c32.magic = client.magic; 286 c32.iocs = client.iocs; 287 288 if (copy_to_user(argp, &c32, sizeof(c32))) 289 return -EFAULT; 290 return 0; 291 } 292 293 typedef struct drm_stats32 { 294 u32 count; 295 struct { 296 u32 value; 297 enum drm_stat_type type; 298 } data[15]; 299 } drm_stats32_t; 300 compat_drm_getstats(struct file * file,unsigned int cmd,unsigned long arg)301 static int compat_drm_getstats(struct file *file, unsigned int cmd, 302 unsigned long arg) 303 { 304 drm_stats32_t __user *argp = (void __user *)arg; 305 int err; 306 307 err = drm_ioctl_kernel(file, drm_noop, NULL, 0); 308 if (err) 309 return err; 310 311 if (clear_user(argp, sizeof(drm_stats32_t))) 312 return -EFAULT; 313 return 0; 314 } 315 316 #if IS_ENABLED(CONFIG_DRM_LEGACY) 317 typedef struct drm_buf_desc32 { 318 int count; /* Number of buffers of this size */ 319 int size; /* Size in bytes */ 320 int low_mark; /* Low water mark */ 321 int high_mark; /* High water mark */ 322 int flags; 323 u32 agp_start; /* Start address in the AGP aperture */ 324 } drm_buf_desc32_t; 325 compat_drm_addbufs(struct file * file,unsigned int cmd,unsigned long arg)326 static int compat_drm_addbufs(struct file *file, unsigned int cmd, 327 unsigned long arg) 328 { 329 drm_buf_desc32_t __user *argp = (void __user *)arg; 330 drm_buf_desc32_t desc32; 331 struct drm_buf_desc desc; 332 int err; 333 334 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t))) 335 return -EFAULT; 336 337 desc = (struct drm_buf_desc){ 338 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark, 339 desc32.flags, desc32.agp_start 340 }; 341 342 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc, 343 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 344 if (err) 345 return err; 346 347 desc32 = (drm_buf_desc32_t){ 348 desc.count, desc.size, desc.low_mark, desc.high_mark, 349 desc.flags, desc.agp_start 350 }; 351 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t))) 352 return -EFAULT; 353 354 return 0; 355 } 356 compat_drm_markbufs(struct file * file,unsigned int cmd,unsigned long arg)357 static int compat_drm_markbufs(struct file *file, unsigned int cmd, 358 unsigned long arg) 359 { 360 drm_buf_desc32_t b32; 361 drm_buf_desc32_t __user *argp = (void __user *)arg; 362 struct drm_buf_desc buf; 363 364 if (copy_from_user(&b32, argp, sizeof(b32))) 365 return -EFAULT; 366 367 buf.size = b32.size; 368 buf.low_mark = b32.low_mark; 369 buf.high_mark = b32.high_mark; 370 371 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf, 372 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 373 } 374 375 typedef struct drm_buf_info32 { 376 int count; /**< Entries in list */ 377 u32 list; 378 } drm_buf_info32_t; 379 copy_one_buf32(void * data,int count,struct drm_buf_entry * from)380 static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from) 381 { 382 drm_buf_info32_t *request = data; 383 drm_buf_desc32_t __user *to = compat_ptr(request->list); 384 drm_buf_desc32_t v = {.count = from->buf_count, 385 .size = from->buf_size, 386 .low_mark = from->low_mark, 387 .high_mark = from->high_mark}; 388 389 if (copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags))) 390 return -EFAULT; 391 return 0; 392 } 393 drm_legacy_infobufs32(struct drm_device * dev,void * data,struct drm_file * file_priv)394 static int drm_legacy_infobufs32(struct drm_device *dev, void *data, 395 struct drm_file *file_priv) 396 { 397 drm_buf_info32_t *request = data; 398 399 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32); 400 } 401 compat_drm_infobufs(struct file * file,unsigned int cmd,unsigned long arg)402 static int compat_drm_infobufs(struct file *file, unsigned int cmd, 403 unsigned long arg) 404 { 405 drm_buf_info32_t req32; 406 drm_buf_info32_t __user *argp = (void __user *)arg; 407 int err; 408 409 if (copy_from_user(&req32, argp, sizeof(req32))) 410 return -EFAULT; 411 412 if (req32.count < 0) 413 req32.count = 0; 414 415 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH); 416 if (err) 417 return err; 418 419 if (put_user(req32.count, &argp->count)) 420 return -EFAULT; 421 422 return 0; 423 } 424 425 typedef struct drm_buf_pub32 { 426 int idx; /**< Index into the master buffer list */ 427 int total; /**< Buffer size */ 428 int used; /**< Amount of buffer in use (for DMA) */ 429 u32 address; /**< Address of buffer */ 430 } drm_buf_pub32_t; 431 432 typedef struct drm_buf_map32 { 433 int count; /**< Length of the buffer list */ 434 u32 virtual; /**< Mmap'd area in user-virtual */ 435 u32 list; /**< Buffer information */ 436 } drm_buf_map32_t; 437 map_one_buf32(void * data,int idx,unsigned long virtual,struct drm_buf * buf)438 static int map_one_buf32(void *data, int idx, unsigned long virtual, 439 struct drm_buf *buf) 440 { 441 drm_buf_map32_t *request = data; 442 drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx; 443 drm_buf_pub32_t v; 444 445 v.idx = buf->idx; 446 v.total = buf->total; 447 v.used = 0; 448 v.address = virtual + buf->offset; 449 if (copy_to_user(to, &v, sizeof(v))) 450 return -EFAULT; 451 return 0; 452 } 453 drm_legacy_mapbufs32(struct drm_device * dev,void * data,struct drm_file * file_priv)454 static int drm_legacy_mapbufs32(struct drm_device *dev, void *data, 455 struct drm_file *file_priv) 456 { 457 drm_buf_map32_t *request = data; 458 void __user *v; 459 int err = __drm_legacy_mapbufs(dev, data, &request->count, 460 &v, map_one_buf32, 461 file_priv); 462 request->virtual = ptr_to_compat(v); 463 return err; 464 } 465 compat_drm_mapbufs(struct file * file,unsigned int cmd,unsigned long arg)466 static int compat_drm_mapbufs(struct file *file, unsigned int cmd, 467 unsigned long arg) 468 { 469 drm_buf_map32_t __user *argp = (void __user *)arg; 470 drm_buf_map32_t req32; 471 int err; 472 473 if (copy_from_user(&req32, argp, sizeof(req32))) 474 return -EFAULT; 475 if (req32.count < 0) 476 return -EINVAL; 477 478 err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH); 479 if (err) 480 return err; 481 482 if (put_user(req32.count, &argp->count) 483 || put_user(req32.virtual, &argp->virtual)) 484 return -EFAULT; 485 486 return 0; 487 } 488 489 typedef struct drm_buf_free32 { 490 int count; 491 u32 list; 492 } drm_buf_free32_t; 493 compat_drm_freebufs(struct file * file,unsigned int cmd,unsigned long arg)494 static int compat_drm_freebufs(struct file *file, unsigned int cmd, 495 unsigned long arg) 496 { 497 drm_buf_free32_t req32; 498 struct drm_buf_free request; 499 drm_buf_free32_t __user *argp = (void __user *)arg; 500 501 if (copy_from_user(&req32, argp, sizeof(req32))) 502 return -EFAULT; 503 504 request.count = req32.count; 505 request.list = compat_ptr(req32.list); 506 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH); 507 } 508 509 typedef struct drm_ctx_priv_map32 { 510 unsigned int ctx_id; /**< Context requesting private mapping */ 511 u32 handle; /**< Handle of map */ 512 } drm_ctx_priv_map32_t; 513 compat_drm_setsareactx(struct file * file,unsigned int cmd,unsigned long arg)514 static int compat_drm_setsareactx(struct file *file, unsigned int cmd, 515 unsigned long arg) 516 { 517 drm_ctx_priv_map32_t req32; 518 struct drm_ctx_priv_map request; 519 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 520 521 if (copy_from_user(&req32, argp, sizeof(req32))) 522 return -EFAULT; 523 524 request.ctx_id = req32.ctx_id; 525 request.handle = compat_ptr(req32.handle); 526 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request, 527 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 528 } 529 compat_drm_getsareactx(struct file * file,unsigned int cmd,unsigned long arg)530 static int compat_drm_getsareactx(struct file *file, unsigned int cmd, 531 unsigned long arg) 532 { 533 struct drm_ctx_priv_map req; 534 drm_ctx_priv_map32_t req32; 535 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 536 int err; 537 538 if (copy_from_user(&req32, argp, sizeof(req32))) 539 return -EFAULT; 540 541 req.ctx_id = req32.ctx_id; 542 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH); 543 if (err) 544 return err; 545 546 req32.handle = ptr_to_compat((void __user *)req.handle); 547 if (copy_to_user(argp, &req32, sizeof(req32))) 548 return -EFAULT; 549 550 return 0; 551 } 552 553 typedef struct drm_ctx_res32 { 554 int count; 555 u32 contexts; 556 } drm_ctx_res32_t; 557 compat_drm_resctx(struct file * file,unsigned int cmd,unsigned long arg)558 static int compat_drm_resctx(struct file *file, unsigned int cmd, 559 unsigned long arg) 560 { 561 drm_ctx_res32_t __user *argp = (void __user *)arg; 562 drm_ctx_res32_t res32; 563 struct drm_ctx_res res; 564 int err; 565 566 if (copy_from_user(&res32, argp, sizeof(res32))) 567 return -EFAULT; 568 569 res.count = res32.count; 570 res.contexts = compat_ptr(res32.contexts); 571 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH); 572 if (err) 573 return err; 574 575 res32.count = res.count; 576 if (copy_to_user(argp, &res32, sizeof(res32))) 577 return -EFAULT; 578 579 return 0; 580 } 581 582 typedef struct drm_dma32 { 583 int context; /**< Context handle */ 584 int send_count; /**< Number of buffers to send */ 585 u32 send_indices; /**< List of handles to buffers */ 586 u32 send_sizes; /**< Lengths of data to send */ 587 enum drm_dma_flags flags; /**< Flags */ 588 int request_count; /**< Number of buffers requested */ 589 int request_size; /**< Desired size for buffers */ 590 u32 request_indices; /**< Buffer information */ 591 u32 request_sizes; 592 int granted_count; /**< Number of buffers granted */ 593 } drm_dma32_t; 594 compat_drm_dma(struct file * file,unsigned int cmd,unsigned long arg)595 static int compat_drm_dma(struct file *file, unsigned int cmd, 596 unsigned long arg) 597 { 598 drm_dma32_t d32; 599 drm_dma32_t __user *argp = (void __user *)arg; 600 struct drm_dma d; 601 int err; 602 603 if (copy_from_user(&d32, argp, sizeof(d32))) 604 return -EFAULT; 605 606 d.context = d32.context; 607 d.send_count = d32.send_count; 608 d.send_indices = compat_ptr(d32.send_indices); 609 d.send_sizes = compat_ptr(d32.send_sizes); 610 d.flags = d32.flags; 611 d.request_count = d32.request_count; 612 d.request_indices = compat_ptr(d32.request_indices); 613 d.request_sizes = compat_ptr(d32.request_sizes); 614 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH); 615 if (err) 616 return err; 617 618 if (put_user(d.request_size, &argp->request_size) 619 || put_user(d.granted_count, &argp->granted_count)) 620 return -EFAULT; 621 622 return 0; 623 } 624 #endif 625 626 #if IS_ENABLED(CONFIG_AGP) 627 typedef struct drm_agp_mode32 { 628 u32 mode; /**< AGP mode */ 629 } drm_agp_mode32_t; 630 compat_drm_agp_enable(struct file * file,unsigned int cmd,unsigned long arg)631 static int compat_drm_agp_enable(struct file *file, unsigned int cmd, 632 unsigned long arg) 633 { 634 drm_agp_mode32_t __user *argp = (void __user *)arg; 635 struct drm_agp_mode mode; 636 637 if (get_user(mode.mode, &argp->mode)) 638 return -EFAULT; 639 640 return drm_ioctl_kernel(file, drm_agp_enable_ioctl, &mode, 641 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 642 } 643 644 typedef struct drm_agp_info32 { 645 int agp_version_major; 646 int agp_version_minor; 647 u32 mode; 648 u32 aperture_base; /* physical address */ 649 u32 aperture_size; /* bytes */ 650 u32 memory_allowed; /* bytes */ 651 u32 memory_used; 652 653 /* PCI information */ 654 unsigned short id_vendor; 655 unsigned short id_device; 656 } drm_agp_info32_t; 657 compat_drm_agp_info(struct file * file,unsigned int cmd,unsigned long arg)658 static int compat_drm_agp_info(struct file *file, unsigned int cmd, 659 unsigned long arg) 660 { 661 drm_agp_info32_t __user *argp = (void __user *)arg; 662 drm_agp_info32_t i32; 663 struct drm_agp_info info; 664 int err; 665 666 err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH); 667 if (err) 668 return err; 669 670 i32.agp_version_major = info.agp_version_major; 671 i32.agp_version_minor = info.agp_version_minor; 672 i32.mode = info.mode; 673 i32.aperture_base = info.aperture_base; 674 i32.aperture_size = info.aperture_size; 675 i32.memory_allowed = info.memory_allowed; 676 i32.memory_used = info.memory_used; 677 i32.id_vendor = info.id_vendor; 678 i32.id_device = info.id_device; 679 if (copy_to_user(argp, &i32, sizeof(i32))) 680 return -EFAULT; 681 682 return 0; 683 } 684 685 typedef struct drm_agp_buffer32 { 686 u32 size; /**< In bytes -- will round to page boundary */ 687 u32 handle; /**< Used for binding / unbinding */ 688 u32 type; /**< Type of memory to allocate */ 689 u32 physical; /**< Physical used by i810 */ 690 } drm_agp_buffer32_t; 691 compat_drm_agp_alloc(struct file * file,unsigned int cmd,unsigned long arg)692 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd, 693 unsigned long arg) 694 { 695 drm_agp_buffer32_t __user *argp = (void __user *)arg; 696 drm_agp_buffer32_t req32; 697 struct drm_agp_buffer request; 698 int err; 699 700 if (copy_from_user(&req32, argp, sizeof(req32))) 701 return -EFAULT; 702 703 request.size = req32.size; 704 request.type = req32.type; 705 err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request, 706 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 707 if (err) 708 return err; 709 710 req32.handle = request.handle; 711 req32.physical = request.physical; 712 if (copy_to_user(argp, &req32, sizeof(req32))) { 713 drm_ioctl_kernel(file, drm_agp_free_ioctl, &request, 714 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 715 return -EFAULT; 716 } 717 718 return 0; 719 } 720 compat_drm_agp_free(struct file * file,unsigned int cmd,unsigned long arg)721 static int compat_drm_agp_free(struct file *file, unsigned int cmd, 722 unsigned long arg) 723 { 724 drm_agp_buffer32_t __user *argp = (void __user *)arg; 725 struct drm_agp_buffer request; 726 727 if (get_user(request.handle, &argp->handle)) 728 return -EFAULT; 729 730 return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request, 731 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 732 } 733 734 typedef struct drm_agp_binding32 { 735 u32 handle; /**< From drm_agp_buffer */ 736 u32 offset; /**< In bytes -- will round to page boundary */ 737 } drm_agp_binding32_t; 738 compat_drm_agp_bind(struct file * file,unsigned int cmd,unsigned long arg)739 static int compat_drm_agp_bind(struct file *file, unsigned int cmd, 740 unsigned long arg) 741 { 742 drm_agp_binding32_t __user *argp = (void __user *)arg; 743 drm_agp_binding32_t req32; 744 struct drm_agp_binding request; 745 746 if (copy_from_user(&req32, argp, sizeof(req32))) 747 return -EFAULT; 748 749 request.handle = req32.handle; 750 request.offset = req32.offset; 751 return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request, 752 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 753 } 754 compat_drm_agp_unbind(struct file * file,unsigned int cmd,unsigned long arg)755 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd, 756 unsigned long arg) 757 { 758 drm_agp_binding32_t __user *argp = (void __user *)arg; 759 struct drm_agp_binding request; 760 761 if (get_user(request.handle, &argp->handle)) 762 return -EFAULT; 763 764 return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request, 765 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 766 } 767 #endif /* CONFIG_AGP */ 768 769 #if IS_ENABLED(CONFIG_DRM_LEGACY) 770 typedef struct drm_scatter_gather32 { 771 u32 size; /**< In bytes -- will round to page boundary */ 772 u32 handle; /**< Used for mapping / unmapping */ 773 } drm_scatter_gather32_t; 774 compat_drm_sg_alloc(struct file * file,unsigned int cmd,unsigned long arg)775 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd, 776 unsigned long arg) 777 { 778 drm_scatter_gather32_t __user *argp = (void __user *)arg; 779 struct drm_scatter_gather request; 780 int err; 781 782 if (get_user(request.size, &argp->size)) 783 return -EFAULT; 784 785 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request, 786 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 787 if (err) 788 return err; 789 790 /* XXX not sure about the handle conversion here... */ 791 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle)) 792 return -EFAULT; 793 794 return 0; 795 } 796 compat_drm_sg_free(struct file * file,unsigned int cmd,unsigned long arg)797 static int compat_drm_sg_free(struct file *file, unsigned int cmd, 798 unsigned long arg) 799 { 800 drm_scatter_gather32_t __user *argp = (void __user *)arg; 801 struct drm_scatter_gather request; 802 unsigned long x; 803 804 if (get_user(x, &argp->handle)) 805 return -EFAULT; 806 request.handle = x << PAGE_SHIFT; 807 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request, 808 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 809 } 810 #endif 811 #if defined(CONFIG_X86) 812 typedef struct drm_update_draw32 { 813 drm_drawable_t handle; 814 unsigned int type; 815 unsigned int num; 816 /* 64-bit version has a 32-bit pad here */ 817 u64 data; /**< Pointer */ 818 } __attribute__((packed)) drm_update_draw32_t; 819 compat_drm_update_draw(struct file * file,unsigned int cmd,unsigned long arg)820 static int compat_drm_update_draw(struct file *file, unsigned int cmd, 821 unsigned long arg) 822 { 823 drm_update_draw32_t update32; 824 825 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32))) 826 return -EFAULT; 827 828 return drm_ioctl_kernel(file, drm_noop, NULL, 829 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 830 } 831 #endif 832 833 struct drm_wait_vblank_request32 { 834 enum drm_vblank_seq_type type; 835 unsigned int sequence; 836 u32 signal; 837 }; 838 839 struct drm_wait_vblank_reply32 { 840 enum drm_vblank_seq_type type; 841 unsigned int sequence; 842 s32 tval_sec; 843 s32 tval_usec; 844 }; 845 846 typedef union drm_wait_vblank32 { 847 struct drm_wait_vblank_request32 request; 848 struct drm_wait_vblank_reply32 reply; 849 } drm_wait_vblank32_t; 850 compat_drm_wait_vblank(struct file * file,unsigned int cmd,unsigned long arg)851 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd, 852 unsigned long arg) 853 { 854 drm_wait_vblank32_t __user *argp = (void __user *)arg; 855 drm_wait_vblank32_t req32; 856 union drm_wait_vblank req; 857 int err; 858 859 if (copy_from_user(&req32, argp, sizeof(req32))) 860 return -EFAULT; 861 862 memset(&req, 0, sizeof(req)); 863 864 req.request.type = req32.request.type; 865 req.request.sequence = req32.request.sequence; 866 req.request.signal = req32.request.signal; 867 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED); 868 869 req32.reply.type = req.reply.type; 870 req32.reply.sequence = req.reply.sequence; 871 req32.reply.tval_sec = req.reply.tval_sec; 872 req32.reply.tval_usec = req.reply.tval_usec; 873 if (copy_to_user(argp, &req32, sizeof(req32))) 874 return -EFAULT; 875 876 return err; 877 } 878 879 #if defined(CONFIG_X86) 880 typedef struct drm_mode_fb_cmd232 { 881 u32 fb_id; 882 u32 width; 883 u32 height; 884 u32 pixel_format; 885 u32 flags; 886 u32 handles[4]; 887 u32 pitches[4]; 888 u32 offsets[4]; 889 u64 modifier[4]; 890 } __attribute__((packed)) drm_mode_fb_cmd232_t; 891 compat_drm_mode_addfb2(struct file * file,unsigned int cmd,unsigned long arg)892 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd, 893 unsigned long arg) 894 { 895 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg; 896 struct drm_mode_fb_cmd2 req64; 897 int err; 898 899 memset(&req64, 0, sizeof(req64)); 900 901 if (copy_from_user(&req64, argp, 902 offsetof(drm_mode_fb_cmd232_t, modifier))) 903 return -EFAULT; 904 905 if (copy_from_user(&req64.modifier, &argp->modifier, 906 sizeof(req64.modifier))) 907 return -EFAULT; 908 909 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64, 0); 910 if (err) 911 return err; 912 913 if (put_user(req64.fb_id, &argp->fb_id)) 914 return -EFAULT; 915 916 return 0; 917 } 918 #endif 919 920 static struct { 921 drm_ioctl_compat_t *fn; 922 char *name; 923 } drm_compat_ioctls[] = { 924 #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n} 925 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version), 926 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique), 927 #if IS_ENABLED(CONFIG_DRM_LEGACY) 928 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap), 929 #endif 930 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient), 931 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats), 932 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique), 933 #if IS_ENABLED(CONFIG_DRM_LEGACY) 934 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap), 935 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs), 936 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs), 937 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs), 938 DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs), 939 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs), 940 DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap), 941 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx), 942 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx), 943 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx), 944 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma), 945 #endif 946 #if IS_ENABLED(CONFIG_AGP) 947 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable), 948 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info), 949 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc), 950 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free), 951 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind), 952 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind), 953 #endif 954 #if IS_ENABLED(CONFIG_DRM_LEGACY) 955 DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc), 956 DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free), 957 #endif 958 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 959 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw), 960 #endif 961 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank), 962 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 963 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2), 964 #endif 965 }; 966 967 /** 968 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers 969 * @filp: file this ioctl is called on 970 * @cmd: ioctl cmd number 971 * @arg: user argument 972 * 973 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual 974 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as 975 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has 976 * botched IOCTL itself, it must handle those by wrapping this function. 977 * 978 * Returns: 979 * Zero on success, negative error code on failure. 980 */ drm_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)981 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 982 { 983 unsigned int nr = DRM_IOCTL_NR(cmd); 984 struct drm_file *file_priv = filp->private_data; 985 drm_ioctl_compat_t *fn; 986 int ret; 987 988 /* Assume that ioctls without an explicit compat routine will just 989 * work. This may not always be a good assumption, but it's better 990 * than always failing. 991 */ 992 if (nr >= ARRAY_SIZE(drm_compat_ioctls)) 993 return drm_ioctl(filp, cmd, arg); 994 995 fn = drm_compat_ioctls[nr].fn; 996 if (!fn) 997 return drm_ioctl(filp, cmd, arg); 998 999 DRM_DEBUG("comm=\"%s\", pid=%d, dev=0x%lx, auth=%d, %s\n", 1000 current->comm, task_pid_nr(current), 1001 (long)old_encode_dev(file_priv->minor->kdev->devt), 1002 file_priv->authenticated, 1003 drm_compat_ioctls[nr].name); 1004 ret = (*fn)(filp, cmd, arg); 1005 if (ret) 1006 DRM_DEBUG("ret = %d\n", ret); 1007 return ret; 1008 } 1009 EXPORT_SYMBOL(drm_compat_ioctl); 1010