drm_ioc32.c 27 KB

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