drm_ioc32.c revision 1.3
1 /* $NetBSD: drm_ioc32.c,v 1.3 2021/12/18 23:44:57 riastradh Exp $ */ 2 3 /* 4 * \file drm_ioc32.c 5 * 6 * 32-bit ioctl compatibility routines for the DRM. 7 * 8 * \author Paul Mackerras <paulus (at) samba.org> 9 * 10 * Copyright (C) Paul Mackerras 2005. 11 * All Rights Reserved. 12 * 13 * Permission is hereby granted, free of charge, to any person obtaining a 14 * copy of this software and associated documentation files (the "Software"), 15 * to deal in the Software without restriction, including without limitation 16 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 17 * and/or sell copies of the Software, and to permit persons to whom the 18 * Software is furnished to do so, subject to the following conditions: 19 * 20 * The above copyright notice and this permission notice (including the next 21 * paragraph) shall be included in all copies or substantial portions of the 22 * Software. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 27 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 28 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 29 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 30 * IN THE SOFTWARE. 31 */ 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: drm_ioc32.c,v 1.3 2021/12/18 23:44:57 riastradh Exp $"); 34 35 #include <linux/compat.h> 36 #include <linux/ratelimit.h> 37 #include <linux/export.h> 38 39 #include <drm/drm_agpsupport.h> 40 #include <drm/drm_file.h> 41 #include <drm/drm_print.h> 42 43 #include "drm_crtc_internal.h" 44 #include "drm_internal.h" 45 #include "drm_legacy.h" 46 47 #define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t) 48 #define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t) 49 #define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t) 50 #define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t) 51 #define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t) 52 53 #define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t) 54 #define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t) 55 #define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t) 56 #define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t) 57 #define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t) 58 #define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t) 59 #define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t) 60 61 #define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t) 62 63 #define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t) 64 #define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t) 65 66 #define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t) 67 #define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t) 68 69 #define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t) 70 #define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t) 71 #define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t) 72 #define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t) 73 #define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t) 74 #define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t) 75 76 #define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t) 77 #define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t) 78 79 #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t) 80 81 #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t) 82 83 #define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t) 84 85 typedef struct drm_version_32 { 86 int version_major; /* Major version */ 87 int version_minor; /* Minor version */ 88 int version_patchlevel; /* Patch level */ 89 u32 name_len; /* Length of name buffer */ 90 u32 name; /* Name of driver */ 91 u32 date_len; /* Length of date buffer */ 92 u32 date; /* User-space buffer to hold date */ 93 u32 desc_len; /* Length of desc buffer */ 94 u32 desc; /* User-space buffer to hold desc */ 95 } drm_version32_t; 96 97 static int compat_drm_version(struct file *file, unsigned int cmd, 98 unsigned long arg) 99 { 100 drm_version32_t v32; 101 struct drm_version v; 102 int err; 103 104 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32))) 105 return -EFAULT; 106 107 v = (struct drm_version) { 108 .name_len = v32.name_len, 109 .name = compat_ptr(v32.name), 110 .date_len = v32.date_len, 111 .date = compat_ptr(v32.date), 112 .desc_len = v32.desc_len, 113 .desc = compat_ptr(v32.desc), 114 }; 115 err = drm_ioctl_kernel(file, drm_version, &v, 116 DRM_RENDER_ALLOW); 117 if (err) 118 return err; 119 120 v32.version_major = v.version_major; 121 v32.version_minor = v.version_minor; 122 v32.version_patchlevel = v.version_patchlevel; 123 v32.name_len = v.name_len; 124 v32.date_len = v.date_len; 125 v32.desc_len = v.desc_len; 126 if (copy_to_user((void __user *)arg, &v32, sizeof(v32))) 127 return -EFAULT; 128 return 0; 129 } 130 131 typedef struct drm_unique32 { 132 u32 unique_len; /* Length of unique */ 133 u32 unique; /* Unique name for driver instantiation */ 134 } drm_unique32_t; 135 136 static int compat_drm_getunique(struct file *file, unsigned int cmd, 137 unsigned long arg) 138 { 139 drm_unique32_t uq32; 140 struct drm_unique uq; 141 int err; 142 143 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32))) 144 return -EFAULT; 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 } 159 160 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; 176 177 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 } 204 205 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 } 238 239 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; 261 262 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 client.idx = c32.idx; 274 275 err = drm_ioctl_kernel(file, drm_getclient, &client, 0); 276 if (err) 277 return err; 278 279 c32.idx = client.idx; 280 c32.auth = client.auth; 281 c32.pid = client.pid; 282 c32.uid = client.uid; 283 c32.magic = client.magic; 284 c32.iocs = client.iocs; 285 286 if (copy_to_user(argp, &c32, sizeof(c32))) 287 return -EFAULT; 288 return 0; 289 } 290 291 typedef struct drm_stats32 { 292 u32 count; 293 struct { 294 u32 value; 295 enum drm_stat_type type; 296 } data[15]; 297 } drm_stats32_t; 298 299 static int compat_drm_getstats(struct file *file, unsigned int cmd, 300 unsigned long arg) 301 { 302 drm_stats32_t __user *argp = (void __user *)arg; 303 int err; 304 305 err = drm_ioctl_kernel(file, drm_noop, NULL, 0); 306 if (err) 307 return err; 308 309 if (clear_user(argp, sizeof(drm_stats32_t))) 310 return -EFAULT; 311 return 0; 312 } 313 314 #if IS_ENABLED(CONFIG_DRM_LEGACY) 315 typedef struct drm_buf_desc32 { 316 int count; /* Number of buffers of this size */ 317 int size; /* Size in bytes */ 318 int low_mark; /* Low water mark */ 319 int high_mark; /* High water mark */ 320 int flags; 321 u32 agp_start; /* Start address in the AGP aperture */ 322 } drm_buf_desc32_t; 323 324 static int compat_drm_addbufs(struct file *file, unsigned int cmd, 325 unsigned long arg) 326 { 327 drm_buf_desc32_t __user *argp = (void __user *)arg; 328 drm_buf_desc32_t desc32; 329 struct drm_buf_desc desc; 330 int err; 331 332 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t))) 333 return -EFAULT; 334 335 desc = (struct drm_buf_desc){ 336 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark, 337 desc32.flags, desc32.agp_start 338 }; 339 340 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc, 341 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 342 if (err) 343 return err; 344 345 desc32 = (drm_buf_desc32_t){ 346 desc.count, desc.size, desc.low_mark, desc.high_mark, 347 desc.flags, desc.agp_start 348 }; 349 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t))) 350 return -EFAULT; 351 352 return 0; 353 } 354 355 static int compat_drm_markbufs(struct file *file, unsigned int cmd, 356 unsigned long arg) 357 { 358 drm_buf_desc32_t b32; 359 drm_buf_desc32_t __user *argp = (void __user *)arg; 360 struct drm_buf_desc buf; 361 362 if (copy_from_user(&b32, argp, sizeof(b32))) 363 return -EFAULT; 364 365 buf.size = b32.size; 366 buf.low_mark = b32.low_mark; 367 buf.high_mark = b32.high_mark; 368 369 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf, 370 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 371 } 372 373 typedef struct drm_buf_info32 { 374 int count; /**< Entries in list */ 375 u32 list; 376 } drm_buf_info32_t; 377 378 static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from) 379 { 380 drm_buf_info32_t *request = data; 381 drm_buf_desc32_t __user *to = compat_ptr(request->list); 382 drm_buf_desc32_t v = {.count = from->buf_count, 383 .size = from->buf_size, 384 .low_mark = from->low_mark, 385 .high_mark = from->high_mark}; 386 387 if (copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags))) 388 return -EFAULT; 389 return 0; 390 } 391 392 static int drm_legacy_infobufs32(struct drm_device *dev, void *data, 393 struct drm_file *file_priv) 394 { 395 drm_buf_info32_t *request = data; 396 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32); 397 } 398 399 static int compat_drm_infobufs(struct file *file, unsigned int cmd, 400 unsigned long arg) 401 { 402 drm_buf_info32_t req32; 403 drm_buf_info32_t __user *argp = (void __user *)arg; 404 int err; 405 406 if (copy_from_user(&req32, argp, sizeof(req32))) 407 return -EFAULT; 408 409 if (req32.count < 0) 410 req32.count = 0; 411 412 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH); 413 if (err) 414 return err; 415 416 if (put_user(req32.count, &argp->count)) 417 return -EFAULT; 418 419 return 0; 420 } 421 422 typedef struct drm_buf_pub32 { 423 int idx; /**< Index into the master buffer list */ 424 int total; /**< Buffer size */ 425 int used; /**< Amount of buffer in use (for DMA) */ 426 u32 address; /**< Address of buffer */ 427 } drm_buf_pub32_t; 428 429 typedef struct drm_buf_map32 { 430 int count; /**< Length of the buffer list */ 431 u32 virtual; /**< Mmap'd area in user-virtual */ 432 u32 list; /**< Buffer information */ 433 } drm_buf_map32_t; 434 435 static int map_one_buf32(void *data, int idx, unsigned long virtual, 436 struct drm_buf *buf) 437 { 438 drm_buf_map32_t *request = data; 439 drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx; 440 drm_buf_pub32_t v; 441 442 v.idx = buf->idx; 443 v.total = buf->total; 444 v.used = 0; 445 v.address = virtual + buf->offset; 446 if (copy_to_user(to, &v, sizeof(v))) 447 return -EFAULT; 448 return 0; 449 } 450 451 static int drm_legacy_mapbufs32(struct drm_device *dev, void *data, 452 struct drm_file *file_priv) 453 { 454 drm_buf_map32_t *request = data; 455 void __user *v; 456 int err = __drm_legacy_mapbufs(dev, data, &request->count, 457 &v, map_one_buf32, 458 file_priv); 459 request->virtual = ptr_to_compat(v); 460 return err; 461 } 462 463 static int compat_drm_mapbufs(struct file *file, unsigned int cmd, 464 unsigned long arg) 465 { 466 drm_buf_map32_t __user *argp = (void __user *)arg; 467 drm_buf_map32_t req32; 468 int err; 469 470 if (copy_from_user(&req32, argp, sizeof(req32))) 471 return -EFAULT; 472 if (req32.count < 0) 473 return -EINVAL; 474 475 err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH); 476 if (err) 477 return err; 478 479 if (put_user(req32.count, &argp->count) 480 || put_user(req32.virtual, &argp->virtual)) 481 return -EFAULT; 482 483 return 0; 484 } 485 486 typedef struct drm_buf_free32 { 487 int count; 488 u32 list; 489 } drm_buf_free32_t; 490 491 static int compat_drm_freebufs(struct file *file, unsigned int cmd, 492 unsigned long arg) 493 { 494 drm_buf_free32_t req32; 495 struct drm_buf_free request; 496 drm_buf_free32_t __user *argp = (void __user *)arg; 497 498 if (copy_from_user(&req32, argp, sizeof(req32))) 499 return -EFAULT; 500 501 request.count = req32.count; 502 request.list = compat_ptr(req32.list); 503 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH); 504 } 505 506 typedef struct drm_ctx_priv_map32 { 507 unsigned int ctx_id; /**< Context requesting private mapping */ 508 u32 handle; /**< Handle of map */ 509 } drm_ctx_priv_map32_t; 510 511 static int compat_drm_setsareactx(struct file *file, unsigned int cmd, 512 unsigned long arg) 513 { 514 drm_ctx_priv_map32_t req32; 515 struct drm_ctx_priv_map request; 516 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 517 518 if (copy_from_user(&req32, argp, sizeof(req32))) 519 return -EFAULT; 520 521 request.ctx_id = req32.ctx_id; 522 request.handle = compat_ptr(req32.handle); 523 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request, 524 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 525 } 526 527 static int compat_drm_getsareactx(struct file *file, unsigned int cmd, 528 unsigned long arg) 529 { 530 struct drm_ctx_priv_map req; 531 drm_ctx_priv_map32_t req32; 532 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 533 int err; 534 535 if (copy_from_user(&req32, argp, sizeof(req32))) 536 return -EFAULT; 537 538 req.ctx_id = req32.ctx_id; 539 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH); 540 if (err) 541 return err; 542 543 req32.handle = ptr_to_compat((void __user *)req.handle); 544 if (copy_to_user(argp, &req32, sizeof(req32))) 545 return -EFAULT; 546 547 return 0; 548 } 549 550 typedef struct drm_ctx_res32 { 551 int count; 552 u32 contexts; 553 } drm_ctx_res32_t; 554 555 static int compat_drm_resctx(struct file *file, unsigned int cmd, 556 unsigned long arg) 557 { 558 drm_ctx_res32_t __user *argp = (void __user *)arg; 559 drm_ctx_res32_t res32; 560 struct drm_ctx_res res; 561 int err; 562 563 if (copy_from_user(&res32, argp, sizeof(res32))) 564 return -EFAULT; 565 566 res.count = res32.count; 567 res.contexts = compat_ptr(res32.contexts); 568 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH); 569 if (err) 570 return err; 571 572 res32.count = res.count; 573 if (copy_to_user(argp, &res32, sizeof(res32))) 574 return -EFAULT; 575 576 return 0; 577 } 578 579 typedef struct drm_dma32 { 580 int context; /**< Context handle */ 581 int send_count; /**< Number of buffers to send */ 582 u32 send_indices; /**< List of handles to buffers */ 583 u32 send_sizes; /**< Lengths of data to send */ 584 enum drm_dma_flags flags; /**< Flags */ 585 int request_count; /**< Number of buffers requested */ 586 int request_size; /**< Desired size for buffers */ 587 u32 request_indices; /**< Buffer information */ 588 u32 request_sizes; 589 int granted_count; /**< Number of buffers granted */ 590 } drm_dma32_t; 591 592 static int compat_drm_dma(struct file *file, unsigned int cmd, 593 unsigned long arg) 594 { 595 drm_dma32_t d32; 596 drm_dma32_t __user *argp = (void __user *)arg; 597 struct drm_dma d; 598 int err; 599 600 if (copy_from_user(&d32, argp, sizeof(d32))) 601 return -EFAULT; 602 603 d.context = d32.context; 604 d.send_count = d32.send_count; 605 d.send_indices = compat_ptr(d32.send_indices); 606 d.send_sizes = compat_ptr(d32.send_sizes); 607 d.flags = d32.flags; 608 d.request_count = d32.request_count; 609 d.request_indices = compat_ptr(d32.request_indices); 610 d.request_sizes = compat_ptr(d32.request_sizes); 611 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH); 612 if (err) 613 return err; 614 615 if (put_user(d.request_size, &argp->request_size) 616 || put_user(d.granted_count, &argp->granted_count)) 617 return -EFAULT; 618 619 return 0; 620 } 621 #endif 622 623 #if IS_ENABLED(CONFIG_AGP) 624 typedef struct drm_agp_mode32 { 625 u32 mode; /**< AGP mode */ 626 } drm_agp_mode32_t; 627 628 static int compat_drm_agp_enable(struct file *file, unsigned int cmd, 629 unsigned long arg) 630 { 631 drm_agp_mode32_t __user *argp = (void __user *)arg; 632 struct drm_agp_mode mode; 633 634 if (get_user(mode.mode, &argp->mode)) 635 return -EFAULT; 636 637 return drm_ioctl_kernel(file, drm_agp_enable_ioctl, &mode, 638 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 639 } 640 641 typedef struct drm_agp_info32 { 642 int agp_version_major; 643 int agp_version_minor; 644 u32 mode; 645 u32 aperture_base; /* physical address */ 646 u32 aperture_size; /* bytes */ 647 u32 memory_allowed; /* bytes */ 648 u32 memory_used; 649 650 /* PCI information */ 651 unsigned short id_vendor; 652 unsigned short id_device; 653 } drm_agp_info32_t; 654 655 static int compat_drm_agp_info(struct file *file, unsigned int cmd, 656 unsigned long arg) 657 { 658 drm_agp_info32_t __user *argp = (void __user *)arg; 659 drm_agp_info32_t i32; 660 struct drm_agp_info info; 661 int err; 662 663 err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH); 664 if (err) 665 return err; 666 667 i32.agp_version_major = info.agp_version_major; 668 i32.agp_version_minor = info.agp_version_minor; 669 i32.mode = info.mode; 670 i32.aperture_base = info.aperture_base; 671 i32.aperture_size = info.aperture_size; 672 i32.memory_allowed = info.memory_allowed; 673 i32.memory_used = info.memory_used; 674 i32.id_vendor = info.id_vendor; 675 i32.id_device = info.id_device; 676 if (copy_to_user(argp, &i32, sizeof(i32))) 677 return -EFAULT; 678 679 return 0; 680 } 681 682 typedef struct drm_agp_buffer32 { 683 u32 size; /**< In bytes -- will round to page boundary */ 684 u32 handle; /**< Used for binding / unbinding */ 685 u32 type; /**< Type of memory to allocate */ 686 u32 physical; /**< Physical used by i810 */ 687 } drm_agp_buffer32_t; 688 689 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd, 690 unsigned long arg) 691 { 692 drm_agp_buffer32_t __user *argp = (void __user *)arg; 693 drm_agp_buffer32_t req32; 694 struct drm_agp_buffer request; 695 int err; 696 697 if (copy_from_user(&req32, argp, sizeof(req32))) 698 return -EFAULT; 699 700 request.size = req32.size; 701 request.type = req32.type; 702 err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request, 703 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 704 if (err) 705 return err; 706 707 req32.handle = request.handle; 708 req32.physical = request.physical; 709 if (copy_to_user(argp, &req32, sizeof(req32))) { 710 drm_ioctl_kernel(file, drm_agp_free_ioctl, &request, 711 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 712 return -EFAULT; 713 } 714 715 return 0; 716 } 717 718 static int compat_drm_agp_free(struct file *file, unsigned int cmd, 719 unsigned long arg) 720 { 721 drm_agp_buffer32_t __user *argp = (void __user *)arg; 722 struct drm_agp_buffer request; 723 724 if (get_user(request.handle, &argp->handle)) 725 return -EFAULT; 726 727 return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request, 728 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 729 } 730 731 typedef struct drm_agp_binding32 { 732 u32 handle; /**< From drm_agp_buffer */ 733 u32 offset; /**< In bytes -- will round to page boundary */ 734 } drm_agp_binding32_t; 735 736 static int compat_drm_agp_bind(struct file *file, unsigned int cmd, 737 unsigned long arg) 738 { 739 drm_agp_binding32_t __user *argp = (void __user *)arg; 740 drm_agp_binding32_t req32; 741 struct drm_agp_binding request; 742 743 if (copy_from_user(&req32, argp, sizeof(req32))) 744 return -EFAULT; 745 746 request.handle = req32.handle; 747 request.offset = req32.offset; 748 return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request, 749 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 750 } 751 752 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd, 753 unsigned long arg) 754 { 755 drm_agp_binding32_t __user *argp = (void __user *)arg; 756 struct drm_agp_binding request; 757 758 if (get_user(request.handle, &argp->handle)) 759 return -EFAULT; 760 761 return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request, 762 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 763 } 764 #endif /* CONFIG_AGP */ 765 766 #if IS_ENABLED(CONFIG_DRM_LEGACY) 767 typedef struct drm_scatter_gather32 { 768 u32 size; /**< In bytes -- will round to page boundary */ 769 u32 handle; /**< Used for mapping / unmapping */ 770 } drm_scatter_gather32_t; 771 772 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd, 773 unsigned long arg) 774 { 775 drm_scatter_gather32_t __user *argp = (void __user *)arg; 776 struct drm_scatter_gather request; 777 int err; 778 779 if (get_user(request.size, &argp->size)) 780 return -EFAULT; 781 782 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request, 783 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 784 if (err) 785 return err; 786 787 /* XXX not sure about the handle conversion here... */ 788 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle)) 789 return -EFAULT; 790 791 return 0; 792 } 793 794 static int compat_drm_sg_free(struct file *file, unsigned int cmd, 795 unsigned long arg) 796 { 797 drm_scatter_gather32_t __user *argp = (void __user *)arg; 798 struct drm_scatter_gather request; 799 unsigned long x; 800 801 if (get_user(x, &argp->handle)) 802 return -EFAULT; 803 request.handle = x << PAGE_SHIFT; 804 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request, 805 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 806 } 807 #endif 808 #if defined(CONFIG_X86) 809 typedef struct drm_update_draw32 { 810 drm_drawable_t handle; 811 unsigned int type; 812 unsigned int num; 813 /* 64-bit version has a 32-bit pad here */ 814 u64 data; /**< Pointer */ 815 } __attribute__((packed)) drm_update_draw32_t; 816 817 static int compat_drm_update_draw(struct file *file, unsigned int cmd, 818 unsigned long arg) 819 { 820 drm_update_draw32_t update32; 821 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32))) 822 return -EFAULT; 823 824 return drm_ioctl_kernel(file, drm_noop, NULL, 825 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 826 } 827 #endif 828 829 struct drm_wait_vblank_request32 { 830 enum drm_vblank_seq_type type; 831 unsigned int sequence; 832 u32 signal; 833 }; 834 835 struct drm_wait_vblank_reply32 { 836 enum drm_vblank_seq_type type; 837 unsigned int sequence; 838 s32 tval_sec; 839 s32 tval_usec; 840 }; 841 842 typedef union drm_wait_vblank32 { 843 struct drm_wait_vblank_request32 request; 844 struct drm_wait_vblank_reply32 reply; 845 } drm_wait_vblank32_t; 846 847 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd, 848 unsigned long arg) 849 { 850 drm_wait_vblank32_t __user *argp = (void __user *)arg; 851 drm_wait_vblank32_t req32; 852 union drm_wait_vblank req; 853 int err; 854 855 if (copy_from_user(&req32, argp, sizeof(req32))) 856 return -EFAULT; 857 858 req.request.type = req32.request.type; 859 req.request.sequence = req32.request.sequence; 860 req.request.signal = req32.request.signal; 861 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED); 862 if (err) 863 return err; 864 865 req32.reply.type = req.reply.type; 866 req32.reply.sequence = req.reply.sequence; 867 req32.reply.tval_sec = req.reply.tval_sec; 868 req32.reply.tval_usec = req.reply.tval_usec; 869 if (copy_to_user(argp, &req32, sizeof(req32))) 870 return -EFAULT; 871 872 return 0; 873 } 874 875 #if defined(CONFIG_X86) 876 typedef struct drm_mode_fb_cmd232 { 877 u32 fb_id; 878 u32 width; 879 u32 height; 880 u32 pixel_format; 881 u32 flags; 882 u32 handles[4]; 883 u32 pitches[4]; 884 u32 offsets[4]; 885 u64 modifier[4]; 886 } __attribute__((packed)) drm_mode_fb_cmd232_t; 887 888 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd, 889 unsigned long arg) 890 { 891 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg; 892 struct drm_mode_fb_cmd2 req64; 893 int err; 894 895 if (copy_from_user(&req64, argp, 896 offsetof(drm_mode_fb_cmd232_t, modifier))) 897 return -EFAULT; 898 899 if (copy_from_user(&req64.modifier, &argp->modifier, 900 sizeof(req64.modifier))) 901 return -EFAULT; 902 903 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64, 0); 904 if (err) 905 return err; 906 907 if (put_user(req64.fb_id, &argp->fb_id)) 908 return -EFAULT; 909 910 return 0; 911 } 912 #endif 913 914 static struct { 915 drm_ioctl_compat_t *fn; 916 char *name; 917 } drm_compat_ioctls[] = { 918 #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n} 919 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version), 920 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique), 921 #if IS_ENABLED(CONFIG_DRM_LEGACY) 922 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap), 923 #endif 924 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient), 925 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats), 926 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique), 927 #if IS_ENABLED(CONFIG_DRM_LEGACY) 928 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap), 929 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs), 930 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs), 931 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs), 932 DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs), 933 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs), 934 DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap), 935 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx), 936 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx), 937 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx), 938 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma), 939 #endif 940 #if IS_ENABLED(CONFIG_AGP) 941 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable), 942 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info), 943 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc), 944 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free), 945 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind), 946 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind), 947 #endif 948 #if IS_ENABLED(CONFIG_DRM_LEGACY) 949 DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc), 950 DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free), 951 #endif 952 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 953 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw), 954 #endif 955 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank), 956 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 957 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2), 958 #endif 959 }; 960 961 /** 962 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers 963 * @filp: file this ioctl is called on 964 * @cmd: ioctl cmd number 965 * @arg: user argument 966 * 967 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual 968 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as 969 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has 970 * botched IOCTL itself, it must handle those by wrapping this function. 971 * 972 * Returns: 973 * Zero on success, negative error code on failure. 974 */ 975 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 976 { 977 unsigned int nr = DRM_IOCTL_NR(cmd); 978 struct drm_file *file_priv = filp->private_data; 979 drm_ioctl_compat_t *fn; 980 int ret; 981 982 /* Assume that ioctls without an explicit compat routine will just 983 * work. This may not always be a good assumption, but it's better 984 * than always failing. 985 */ 986 if (nr >= ARRAY_SIZE(drm_compat_ioctls)) 987 return drm_ioctl(filp, cmd, arg); 988 989 fn = drm_compat_ioctls[nr].fn; 990 if (!fn) 991 return drm_ioctl(filp, cmd, arg); 992 993 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n", 994 task_pid_nr(current), 995 (long)old_encode_dev(file_priv->minor->kdev->devt), 996 file_priv->authenticated, 997 drm_compat_ioctls[nr].name); 998 ret = (*fn)(filp, cmd, arg); 999 if (ret) 1000 DRM_DEBUG("ret = %d\n", ret); 1001 return ret; 1002 } 1003 EXPORT_SYMBOL(drm_compat_ioctl); 1004
Indexes created Thu Oct 02 10:09:58 GMT 2025