Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /** |
| 2 | * \file drm_bufs.h |
| 3 | * Generic buffer template |
| 4 | * |
| 5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
| 6 | * \author Gareth Hughes <gareth@valinux.com> |
| 7 | */ |
| 8 | |
| 9 | /* |
| 10 | * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com |
| 11 | * |
| 12 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. |
| 13 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. |
| 14 | * All Rights Reserved. |
| 15 | * |
| 16 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 17 | * copy of this software and associated documentation files (the "Software"), |
| 18 | * to deal in the Software without restriction, including without limitation |
| 19 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 20 | * and/or sell copies of the Software, and to permit persons to whom the |
| 21 | * Software is furnished to do so, subject to the following conditions: |
| 22 | * |
| 23 | * The above copyright notice and this permission notice (including the next |
| 24 | * paragraph) shall be included in all copies or substantial portions of the |
| 25 | * Software. |
| 26 | * |
| 27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 28 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 29 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 30 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 31 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 32 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 33 | * OTHER DEALINGS IN THE SOFTWARE. |
| 34 | */ |
| 35 | |
| 36 | #include <linux/vmalloc.h> |
| 37 | #include "drmP.h" |
| 38 | |
| 39 | /** |
| 40 | * Compute size order. Returns the exponent of the smaller power of two which |
| 41 | * is greater or equal to given number. |
| 42 | * |
| 43 | * \param size size. |
| 44 | * \return order. |
| 45 | * |
| 46 | * \todo Can be made faster. |
| 47 | */ |
| 48 | int drm_order( unsigned long size ) |
| 49 | { |
| 50 | int order; |
| 51 | unsigned long tmp; |
| 52 | |
| 53 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) |
| 54 | ; |
| 55 | |
| 56 | if (size & (size - 1)) |
| 57 | ++order; |
| 58 | |
| 59 | return order; |
| 60 | } |
| 61 | EXPORT_SYMBOL(drm_order); |
| 62 | |
| 63 | /** |
| 64 | * Ioctl to specify a range of memory that is available for mapping by a non-root process. |
| 65 | * |
| 66 | * \param inode device inode. |
| 67 | * \param filp file pointer. |
| 68 | * \param cmd command. |
| 69 | * \param arg pointer to a drm_map structure. |
| 70 | * \return zero on success or a negative value on error. |
| 71 | * |
| 72 | * Adjusts the memory offset to its absolute value according to the mapping |
| 73 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where |
| 74 | * applicable and if supported by the kernel. |
| 75 | */ |
| 76 | int drm_addmap( struct inode *inode, struct file *filp, |
| 77 | unsigned int cmd, unsigned long arg ) |
| 78 | { |
| 79 | drm_file_t *priv = filp->private_data; |
| 80 | drm_device_t *dev = priv->head->dev; |
| 81 | drm_map_t *map; |
| 82 | drm_map_t __user *argp = (void __user *)arg; |
| 83 | drm_map_list_t *list; |
| 84 | |
| 85 | if ( !(filp->f_mode & 3) ) return -EACCES; /* Require read/write */ |
| 86 | |
| 87 | map = drm_alloc( sizeof(*map), DRM_MEM_MAPS ); |
| 88 | if ( !map ) |
| 89 | return -ENOMEM; |
| 90 | |
| 91 | if ( copy_from_user( map, argp, sizeof(*map) ) ) { |
| 92 | drm_free( map, sizeof(*map), DRM_MEM_MAPS ); |
| 93 | return -EFAULT; |
| 94 | } |
| 95 | |
| 96 | /* Only allow shared memory to be removable since we only keep enough |
| 97 | * book keeping information about shared memory to allow for removal |
| 98 | * when processes fork. |
| 99 | */ |
| 100 | if ( (map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM ) { |
| 101 | drm_free( map, sizeof(*map), DRM_MEM_MAPS ); |
| 102 | return -EINVAL; |
| 103 | } |
| 104 | DRM_DEBUG( "offset = 0x%08lx, size = 0x%08lx, type = %d\n", |
| 105 | map->offset, map->size, map->type ); |
| 106 | if ( (map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK)) ) { |
| 107 | drm_free( map, sizeof(*map), DRM_MEM_MAPS ); |
| 108 | return -EINVAL; |
| 109 | } |
| 110 | map->mtrr = -1; |
| 111 | map->handle = NULL; |
| 112 | |
| 113 | switch ( map->type ) { |
| 114 | case _DRM_REGISTERS: |
| 115 | case _DRM_FRAME_BUFFER: |
| 116 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) |
| 117 | if ( map->offset + map->size < map->offset || |
| 118 | map->offset < virt_to_phys(high_memory) ) { |
| 119 | drm_free( map, sizeof(*map), DRM_MEM_MAPS ); |
| 120 | return -EINVAL; |
| 121 | } |
| 122 | #endif |
| 123 | #ifdef __alpha__ |
| 124 | map->offset += dev->hose->mem_space->start; |
| 125 | #endif |
| 126 | if (drm_core_has_MTRR(dev)) { |
| 127 | if ( map->type == _DRM_FRAME_BUFFER || |
| 128 | (map->flags & _DRM_WRITE_COMBINING) ) { |
| 129 | map->mtrr = mtrr_add( map->offset, map->size, |
| 130 | MTRR_TYPE_WRCOMB, 1 ); |
| 131 | } |
| 132 | } |
| 133 | if (map->type == _DRM_REGISTERS) |
| 134 | map->handle = drm_ioremap( map->offset, map->size, |
| 135 | dev ); |
| 136 | break; |
| 137 | |
| 138 | case _DRM_SHM: |
| 139 | map->handle = vmalloc_32(map->size); |
| 140 | DRM_DEBUG( "%lu %d %p\n", |
| 141 | map->size, drm_order( map->size ), map->handle ); |
| 142 | if ( !map->handle ) { |
| 143 | drm_free( map, sizeof(*map), DRM_MEM_MAPS ); |
| 144 | return -ENOMEM; |
| 145 | } |
| 146 | map->offset = (unsigned long)map->handle; |
| 147 | if ( map->flags & _DRM_CONTAINS_LOCK ) { |
| 148 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
| 149 | if (dev->lock.hw_lock != NULL) { |
| 150 | vfree( map->handle ); |
| 151 | drm_free( map, sizeof(*map), DRM_MEM_MAPS ); |
| 152 | return -EBUSY; |
| 153 | } |
| 154 | dev->sigdata.lock = |
| 155 | dev->lock.hw_lock = map->handle; /* Pointer to lock */ |
| 156 | } |
| 157 | break; |
| 158 | case _DRM_AGP: |
| 159 | if (drm_core_has_AGP(dev)) { |
| 160 | #ifdef __alpha__ |
| 161 | map->offset += dev->hose->mem_space->start; |
| 162 | #endif |
| 163 | map->offset += dev->agp->base; |
| 164 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
| 165 | } |
| 166 | break; |
| 167 | case _DRM_SCATTER_GATHER: |
| 168 | if (!dev->sg) { |
| 169 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 170 | return -EINVAL; |
| 171 | } |
| 172 | map->offset += dev->sg->handle; |
| 173 | break; |
| 174 | |
| 175 | default: |
| 176 | drm_free( map, sizeof(*map), DRM_MEM_MAPS ); |
| 177 | return -EINVAL; |
| 178 | } |
| 179 | |
| 180 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); |
| 181 | if(!list) { |
| 182 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 183 | return -EINVAL; |
| 184 | } |
| 185 | memset(list, 0, sizeof(*list)); |
| 186 | list->map = map; |
| 187 | |
| 188 | down(&dev->struct_sem); |
| 189 | list_add(&list->head, &dev->maplist->head); |
| 190 | up(&dev->struct_sem); |
| 191 | |
| 192 | if ( copy_to_user( argp, map, sizeof(*map) ) ) |
| 193 | return -EFAULT; |
| 194 | if ( map->type != _DRM_SHM ) { |
| 195 | if ( copy_to_user( &argp->handle, |
| 196 | &map->offset, |
| 197 | sizeof(map->offset) ) ) |
| 198 | return -EFAULT; |
| 199 | } |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | |
| 204 | /** |
| 205 | * Remove a map private from list and deallocate resources if the mapping |
| 206 | * isn't in use. |
| 207 | * |
| 208 | * \param inode device inode. |
| 209 | * \param filp file pointer. |
| 210 | * \param cmd command. |
| 211 | * \param arg pointer to a drm_map_t structure. |
| 212 | * \return zero on success or a negative value on error. |
| 213 | * |
| 214 | * Searches the map on drm_device::maplist, removes it from the list, see if |
| 215 | * its being used, and free any associate resource (such as MTRR's) if it's not |
| 216 | * being on use. |
| 217 | * |
| 218 | * \sa addmap(). |
| 219 | */ |
| 220 | int drm_rmmap(struct inode *inode, struct file *filp, |
| 221 | unsigned int cmd, unsigned long arg) |
| 222 | { |
| 223 | drm_file_t *priv = filp->private_data; |
| 224 | drm_device_t *dev = priv->head->dev; |
| 225 | struct list_head *list; |
| 226 | drm_map_list_t *r_list = NULL; |
| 227 | drm_vma_entry_t *pt, *prev; |
| 228 | drm_map_t *map; |
| 229 | drm_map_t request; |
| 230 | int found_maps = 0; |
| 231 | |
| 232 | if (copy_from_user(&request, (drm_map_t __user *)arg, |
| 233 | sizeof(request))) { |
| 234 | return -EFAULT; |
| 235 | } |
| 236 | |
| 237 | down(&dev->struct_sem); |
| 238 | list = &dev->maplist->head; |
| 239 | list_for_each(list, &dev->maplist->head) { |
| 240 | r_list = list_entry(list, drm_map_list_t, head); |
| 241 | |
| 242 | if(r_list->map && |
| 243 | r_list->map->handle == request.handle && |
| 244 | r_list->map->flags & _DRM_REMOVABLE) break; |
| 245 | } |
| 246 | |
| 247 | /* List has wrapped around to the head pointer, or its empty we didn't |
| 248 | * find anything. |
| 249 | */ |
| 250 | if(list == (&dev->maplist->head)) { |
| 251 | up(&dev->struct_sem); |
| 252 | return -EINVAL; |
| 253 | } |
| 254 | map = r_list->map; |
| 255 | list_del(list); |
| 256 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); |
| 257 | |
| 258 | for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) { |
| 259 | if (pt->vma->vm_private_data == map) found_maps++; |
| 260 | } |
| 261 | |
| 262 | if(!found_maps) { |
| 263 | switch (map->type) { |
| 264 | case _DRM_REGISTERS: |
| 265 | case _DRM_FRAME_BUFFER: |
| 266 | if (drm_core_has_MTRR(dev)) { |
| 267 | if (map->mtrr >= 0) { |
| 268 | int retcode; |
| 269 | retcode = mtrr_del(map->mtrr, |
| 270 | map->offset, |
| 271 | map->size); |
| 272 | DRM_DEBUG("mtrr_del = %d\n", retcode); |
| 273 | } |
| 274 | } |
| 275 | drm_ioremapfree(map->handle, map->size, dev); |
| 276 | break; |
| 277 | case _DRM_SHM: |
| 278 | vfree(map->handle); |
| 279 | break; |
| 280 | case _DRM_AGP: |
| 281 | case _DRM_SCATTER_GATHER: |
| 282 | break; |
| 283 | } |
| 284 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
| 285 | } |
| 286 | up(&dev->struct_sem); |
| 287 | return 0; |
| 288 | } |
| 289 | |
| 290 | /** |
| 291 | * Cleanup after an error on one of the addbufs() functions. |
| 292 | * |
| 293 | * \param entry buffer entry where the error occurred. |
| 294 | * |
| 295 | * Frees any pages and buffers associated with the given entry. |
| 296 | */ |
| 297 | static void drm_cleanup_buf_error(drm_device_t *dev, drm_buf_entry_t *entry) |
| 298 | { |
| 299 | int i; |
| 300 | |
| 301 | if (entry->seg_count) { |
| 302 | for (i = 0; i < entry->seg_count; i++) { |
| 303 | if (entry->seglist[i]) { |
| 304 | drm_free_pages(entry->seglist[i], |
| 305 | entry->page_order, |
| 306 | DRM_MEM_DMA); |
| 307 | } |
| 308 | } |
| 309 | drm_free(entry->seglist, |
| 310 | entry->seg_count * |
| 311 | sizeof(*entry->seglist), |
| 312 | DRM_MEM_SEGS); |
| 313 | |
| 314 | entry->seg_count = 0; |
| 315 | } |
| 316 | |
| 317 | if (entry->buf_count) { |
| 318 | for (i = 0; i < entry->buf_count; i++) { |
| 319 | if (entry->buflist[i].dev_private) { |
| 320 | drm_free(entry->buflist[i].dev_private, |
| 321 | entry->buflist[i].dev_priv_size, |
| 322 | DRM_MEM_BUFS); |
| 323 | } |
| 324 | } |
| 325 | drm_free(entry->buflist, |
| 326 | entry->buf_count * |
| 327 | sizeof(*entry->buflist), |
| 328 | DRM_MEM_BUFS); |
| 329 | |
| 330 | entry->buf_count = 0; |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | #if __OS_HAS_AGP |
| 335 | /** |
| 336 | * Add AGP buffers for DMA transfers (ioctl). |
| 337 | * |
| 338 | * \param inode device inode. |
| 339 | * \param filp file pointer. |
| 340 | * \param cmd command. |
| 341 | * \param arg pointer to a drm_buf_desc_t request. |
| 342 | * \return zero on success or a negative number on failure. |
| 343 | * |
| 344 | * After some sanity checks creates a drm_buf structure for each buffer and |
| 345 | * reallocates the buffer list of the same size order to accommodate the new |
| 346 | * buffers. |
| 347 | */ |
| 348 | int drm_addbufs_agp( struct inode *inode, struct file *filp, |
| 349 | unsigned int cmd, unsigned long arg ) |
| 350 | { |
| 351 | drm_file_t *priv = filp->private_data; |
| 352 | drm_device_t *dev = priv->head->dev; |
| 353 | drm_device_dma_t *dma = dev->dma; |
| 354 | drm_buf_desc_t request; |
| 355 | drm_buf_entry_t *entry; |
| 356 | drm_buf_t *buf; |
| 357 | unsigned long offset; |
| 358 | unsigned long agp_offset; |
| 359 | int count; |
| 360 | int order; |
| 361 | int size; |
| 362 | int alignment; |
| 363 | int page_order; |
| 364 | int total; |
| 365 | int byte_count; |
| 366 | int i; |
| 367 | drm_buf_t **temp_buflist; |
| 368 | drm_buf_desc_t __user *argp = (void __user *)arg; |
| 369 | |
| 370 | if ( !dma ) return -EINVAL; |
| 371 | |
| 372 | if ( copy_from_user( &request, argp, |
| 373 | sizeof(request) ) ) |
| 374 | return -EFAULT; |
| 375 | |
| 376 | count = request.count; |
| 377 | order = drm_order( request.size ); |
| 378 | size = 1 << order; |
| 379 | |
| 380 | alignment = (request.flags & _DRM_PAGE_ALIGN) |
| 381 | ? PAGE_ALIGN(size) : size; |
| 382 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
| 383 | total = PAGE_SIZE << page_order; |
| 384 | |
| 385 | byte_count = 0; |
| 386 | agp_offset = dev->agp->base + request.agp_start; |
| 387 | |
| 388 | DRM_DEBUG( "count: %d\n", count ); |
| 389 | DRM_DEBUG( "order: %d\n", order ); |
| 390 | DRM_DEBUG( "size: %d\n", size ); |
| 391 | DRM_DEBUG( "agp_offset: %lu\n", agp_offset ); |
| 392 | DRM_DEBUG( "alignment: %d\n", alignment ); |
| 393 | DRM_DEBUG( "page_order: %d\n", page_order ); |
| 394 | DRM_DEBUG( "total: %d\n", total ); |
| 395 | |
| 396 | if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return -EINVAL; |
| 397 | if ( dev->queue_count ) return -EBUSY; /* Not while in use */ |
| 398 | |
| 399 | spin_lock( &dev->count_lock ); |
| 400 | if ( dev->buf_use ) { |
| 401 | spin_unlock( &dev->count_lock ); |
| 402 | return -EBUSY; |
| 403 | } |
| 404 | atomic_inc( &dev->buf_alloc ); |
| 405 | spin_unlock( &dev->count_lock ); |
| 406 | |
| 407 | down( &dev->struct_sem ); |
| 408 | entry = &dma->bufs[order]; |
| 409 | if ( entry->buf_count ) { |
| 410 | up( &dev->struct_sem ); |
| 411 | atomic_dec( &dev->buf_alloc ); |
| 412 | return -ENOMEM; /* May only call once for each order */ |
| 413 | } |
| 414 | |
| 415 | if (count < 0 || count > 4096) { |
| 416 | up( &dev->struct_sem ); |
| 417 | atomic_dec( &dev->buf_alloc ); |
| 418 | return -EINVAL; |
| 419 | } |
| 420 | |
| 421 | entry->buflist = drm_alloc( count * sizeof(*entry->buflist), |
| 422 | DRM_MEM_BUFS ); |
| 423 | if ( !entry->buflist ) { |
| 424 | up( &dev->struct_sem ); |
| 425 | atomic_dec( &dev->buf_alloc ); |
| 426 | return -ENOMEM; |
| 427 | } |
| 428 | memset( entry->buflist, 0, count * sizeof(*entry->buflist) ); |
| 429 | |
| 430 | entry->buf_size = size; |
| 431 | entry->page_order = page_order; |
| 432 | |
| 433 | offset = 0; |
| 434 | |
| 435 | while ( entry->buf_count < count ) { |
| 436 | buf = &entry->buflist[entry->buf_count]; |
| 437 | buf->idx = dma->buf_count + entry->buf_count; |
| 438 | buf->total = alignment; |
| 439 | buf->order = order; |
| 440 | buf->used = 0; |
| 441 | |
| 442 | buf->offset = (dma->byte_count + offset); |
| 443 | buf->bus_address = agp_offset + offset; |
| 444 | buf->address = (void *)(agp_offset + offset); |
| 445 | buf->next = NULL; |
| 446 | buf->waiting = 0; |
| 447 | buf->pending = 0; |
| 448 | init_waitqueue_head( &buf->dma_wait ); |
| 449 | buf->filp = NULL; |
| 450 | |
| 451 | buf->dev_priv_size = dev->driver->dev_priv_size; |
| 452 | buf->dev_private = drm_alloc( buf->dev_priv_size, |
| 453 | DRM_MEM_BUFS ); |
| 454 | if(!buf->dev_private) { |
| 455 | /* Set count correctly so we free the proper amount. */ |
| 456 | entry->buf_count = count; |
| 457 | drm_cleanup_buf_error(dev,entry); |
| 458 | up( &dev->struct_sem ); |
| 459 | atomic_dec( &dev->buf_alloc ); |
| 460 | return -ENOMEM; |
| 461 | } |
| 462 | memset( buf->dev_private, 0, buf->dev_priv_size ); |
| 463 | |
| 464 | DRM_DEBUG( "buffer %d @ %p\n", |
| 465 | entry->buf_count, buf->address ); |
| 466 | |
| 467 | offset += alignment; |
| 468 | entry->buf_count++; |
| 469 | byte_count += PAGE_SIZE << page_order; |
| 470 | } |
| 471 | |
| 472 | DRM_DEBUG( "byte_count: %d\n", byte_count ); |
| 473 | |
| 474 | temp_buflist = drm_realloc( dma->buflist, |
| 475 | dma->buf_count * sizeof(*dma->buflist), |
| 476 | (dma->buf_count + entry->buf_count) |
| 477 | * sizeof(*dma->buflist), |
| 478 | DRM_MEM_BUFS ); |
| 479 | if(!temp_buflist) { |
| 480 | /* Free the entry because it isn't valid */ |
| 481 | drm_cleanup_buf_error(dev,entry); |
| 482 | up( &dev->struct_sem ); |
| 483 | atomic_dec( &dev->buf_alloc ); |
| 484 | return -ENOMEM; |
| 485 | } |
| 486 | dma->buflist = temp_buflist; |
| 487 | |
| 488 | for ( i = 0 ; i < entry->buf_count ; i++ ) { |
| 489 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
| 490 | } |
| 491 | |
| 492 | dma->buf_count += entry->buf_count; |
| 493 | dma->byte_count += byte_count; |
| 494 | |
| 495 | DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count ); |
| 496 | DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count ); |
| 497 | |
| 498 | up( &dev->struct_sem ); |
| 499 | |
| 500 | request.count = entry->buf_count; |
| 501 | request.size = size; |
| 502 | |
| 503 | if ( copy_to_user( argp, &request, sizeof(request) ) ) |
| 504 | return -EFAULT; |
| 505 | |
| 506 | dma->flags = _DRM_DMA_USE_AGP; |
| 507 | |
| 508 | atomic_dec( &dev->buf_alloc ); |
| 509 | return 0; |
| 510 | } |
| 511 | #endif /* __OS_HAS_AGP */ |
| 512 | |
| 513 | int drm_addbufs_pci( struct inode *inode, struct file *filp, |
| 514 | unsigned int cmd, unsigned long arg ) |
| 515 | { |
| 516 | drm_file_t *priv = filp->private_data; |
| 517 | drm_device_t *dev = priv->head->dev; |
| 518 | drm_device_dma_t *dma = dev->dma; |
| 519 | drm_buf_desc_t request; |
| 520 | int count; |
| 521 | int order; |
| 522 | int size; |
| 523 | int total; |
| 524 | int page_order; |
| 525 | drm_buf_entry_t *entry; |
| 526 | unsigned long page; |
| 527 | drm_buf_t *buf; |
| 528 | int alignment; |
| 529 | unsigned long offset; |
| 530 | int i; |
| 531 | int byte_count; |
| 532 | int page_count; |
| 533 | unsigned long *temp_pagelist; |
| 534 | drm_buf_t **temp_buflist; |
| 535 | drm_buf_desc_t __user *argp = (void __user *)arg; |
| 536 | |
| 537 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) return -EINVAL; |
| 538 | if ( !dma ) return -EINVAL; |
| 539 | |
| 540 | if ( copy_from_user( &request, argp, sizeof(request) ) ) |
| 541 | return -EFAULT; |
| 542 | |
| 543 | count = request.count; |
| 544 | order = drm_order( request.size ); |
| 545 | size = 1 << order; |
| 546 | |
| 547 | DRM_DEBUG( "count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
| 548 | request.count, request.size, size, |
| 549 | order, dev->queue_count ); |
| 550 | |
| 551 | if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return -EINVAL; |
| 552 | if ( dev->queue_count ) return -EBUSY; /* Not while in use */ |
| 553 | |
| 554 | alignment = (request.flags & _DRM_PAGE_ALIGN) |
| 555 | ? PAGE_ALIGN(size) : size; |
| 556 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
| 557 | total = PAGE_SIZE << page_order; |
| 558 | |
| 559 | spin_lock( &dev->count_lock ); |
| 560 | if ( dev->buf_use ) { |
| 561 | spin_unlock( &dev->count_lock ); |
| 562 | return -EBUSY; |
| 563 | } |
| 564 | atomic_inc( &dev->buf_alloc ); |
| 565 | spin_unlock( &dev->count_lock ); |
| 566 | |
| 567 | down( &dev->struct_sem ); |
| 568 | entry = &dma->bufs[order]; |
| 569 | if ( entry->buf_count ) { |
| 570 | up( &dev->struct_sem ); |
| 571 | atomic_dec( &dev->buf_alloc ); |
| 572 | return -ENOMEM; /* May only call once for each order */ |
| 573 | } |
| 574 | |
| 575 | if (count < 0 || count > 4096) { |
| 576 | up( &dev->struct_sem ); |
| 577 | atomic_dec( &dev->buf_alloc ); |
| 578 | return -EINVAL; |
| 579 | } |
| 580 | |
| 581 | entry->buflist = drm_alloc( count * sizeof(*entry->buflist), |
| 582 | DRM_MEM_BUFS ); |
| 583 | if ( !entry->buflist ) { |
| 584 | up( &dev->struct_sem ); |
| 585 | atomic_dec( &dev->buf_alloc ); |
| 586 | return -ENOMEM; |
| 587 | } |
| 588 | memset( entry->buflist, 0, count * sizeof(*entry->buflist) ); |
| 589 | |
| 590 | entry->seglist = drm_alloc( count * sizeof(*entry->seglist), |
| 591 | DRM_MEM_SEGS ); |
| 592 | if ( !entry->seglist ) { |
| 593 | drm_free( entry->buflist, |
| 594 | count * sizeof(*entry->buflist), |
| 595 | DRM_MEM_BUFS ); |
| 596 | up( &dev->struct_sem ); |
| 597 | atomic_dec( &dev->buf_alloc ); |
| 598 | return -ENOMEM; |
| 599 | } |
| 600 | memset( entry->seglist, 0, count * sizeof(*entry->seglist) ); |
| 601 | |
| 602 | /* Keep the original pagelist until we know all the allocations |
| 603 | * have succeeded |
| 604 | */ |
| 605 | temp_pagelist = drm_alloc( (dma->page_count + (count << page_order)) |
| 606 | * sizeof(*dma->pagelist), |
| 607 | DRM_MEM_PAGES ); |
| 608 | if (!temp_pagelist) { |
| 609 | drm_free( entry->buflist, |
| 610 | count * sizeof(*entry->buflist), |
| 611 | DRM_MEM_BUFS ); |
| 612 | drm_free( entry->seglist, |
| 613 | count * sizeof(*entry->seglist), |
| 614 | DRM_MEM_SEGS ); |
| 615 | up( &dev->struct_sem ); |
| 616 | atomic_dec( &dev->buf_alloc ); |
| 617 | return -ENOMEM; |
| 618 | } |
| 619 | memcpy(temp_pagelist, |
| 620 | dma->pagelist, |
| 621 | dma->page_count * sizeof(*dma->pagelist)); |
| 622 | DRM_DEBUG( "pagelist: %d entries\n", |
| 623 | dma->page_count + (count << page_order) ); |
| 624 | |
| 625 | entry->buf_size = size; |
| 626 | entry->page_order = page_order; |
| 627 | byte_count = 0; |
| 628 | page_count = 0; |
| 629 | |
| 630 | while ( entry->buf_count < count ) { |
| 631 | page = drm_alloc_pages( page_order, DRM_MEM_DMA ); |
| 632 | if ( !page ) { |
| 633 | /* Set count correctly so we free the proper amount. */ |
| 634 | entry->buf_count = count; |
| 635 | entry->seg_count = count; |
| 636 | drm_cleanup_buf_error(dev, entry); |
| 637 | drm_free( temp_pagelist, |
| 638 | (dma->page_count + (count << page_order)) |
| 639 | * sizeof(*dma->pagelist), |
| 640 | DRM_MEM_PAGES ); |
| 641 | up( &dev->struct_sem ); |
| 642 | atomic_dec( &dev->buf_alloc ); |
| 643 | return -ENOMEM; |
| 644 | } |
| 645 | entry->seglist[entry->seg_count++] = page; |
| 646 | for ( i = 0 ; i < (1 << page_order) ; i++ ) { |
| 647 | DRM_DEBUG( "page %d @ 0x%08lx\n", |
| 648 | dma->page_count + page_count, |
| 649 | page + PAGE_SIZE * i ); |
| 650 | temp_pagelist[dma->page_count + page_count++] |
| 651 | = page + PAGE_SIZE * i; |
| 652 | } |
| 653 | for ( offset = 0 ; |
| 654 | offset + size <= total && entry->buf_count < count ; |
| 655 | offset += alignment, ++entry->buf_count ) { |
| 656 | buf = &entry->buflist[entry->buf_count]; |
| 657 | buf->idx = dma->buf_count + entry->buf_count; |
| 658 | buf->total = alignment; |
| 659 | buf->order = order; |
| 660 | buf->used = 0; |
| 661 | buf->offset = (dma->byte_count + byte_count + offset); |
| 662 | buf->address = (void *)(page + offset); |
| 663 | buf->next = NULL; |
| 664 | buf->waiting = 0; |
| 665 | buf->pending = 0; |
| 666 | init_waitqueue_head( &buf->dma_wait ); |
| 667 | buf->filp = NULL; |
| 668 | |
| 669 | buf->dev_priv_size = dev->driver->dev_priv_size; |
| 670 | buf->dev_private = drm_alloc( buf->dev_priv_size, |
| 671 | DRM_MEM_BUFS ); |
| 672 | if(!buf->dev_private) { |
| 673 | /* Set count correctly so we free the proper amount. */ |
| 674 | entry->buf_count = count; |
| 675 | entry->seg_count = count; |
| 676 | drm_cleanup_buf_error(dev,entry); |
| 677 | drm_free( temp_pagelist, |
| 678 | (dma->page_count + (count << page_order)) |
| 679 | * sizeof(*dma->pagelist), |
| 680 | DRM_MEM_PAGES ); |
| 681 | up( &dev->struct_sem ); |
| 682 | atomic_dec( &dev->buf_alloc ); |
| 683 | return -ENOMEM; |
| 684 | } |
| 685 | memset( buf->dev_private, 0, buf->dev_priv_size ); |
| 686 | |
| 687 | DRM_DEBUG( "buffer %d @ %p\n", |
| 688 | entry->buf_count, buf->address ); |
| 689 | } |
| 690 | byte_count += PAGE_SIZE << page_order; |
| 691 | } |
| 692 | |
| 693 | temp_buflist = drm_realloc( dma->buflist, |
| 694 | dma->buf_count * sizeof(*dma->buflist), |
| 695 | (dma->buf_count + entry->buf_count) |
| 696 | * sizeof(*dma->buflist), |
| 697 | DRM_MEM_BUFS ); |
| 698 | if (!temp_buflist) { |
| 699 | /* Free the entry because it isn't valid */ |
| 700 | drm_cleanup_buf_error(dev,entry); |
| 701 | drm_free( temp_pagelist, |
| 702 | (dma->page_count + (count << page_order)) |
| 703 | * sizeof(*dma->pagelist), |
| 704 | DRM_MEM_PAGES ); |
| 705 | up( &dev->struct_sem ); |
| 706 | atomic_dec( &dev->buf_alloc ); |
| 707 | return -ENOMEM; |
| 708 | } |
| 709 | dma->buflist = temp_buflist; |
| 710 | |
| 711 | for ( i = 0 ; i < entry->buf_count ; i++ ) { |
| 712 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
| 713 | } |
| 714 | |
| 715 | /* No allocations failed, so now we can replace the orginal pagelist |
| 716 | * with the new one. |
| 717 | */ |
| 718 | if (dma->page_count) { |
| 719 | drm_free(dma->pagelist, |
| 720 | dma->page_count * sizeof(*dma->pagelist), |
| 721 | DRM_MEM_PAGES); |
| 722 | } |
| 723 | dma->pagelist = temp_pagelist; |
| 724 | |
| 725 | dma->buf_count += entry->buf_count; |
| 726 | dma->seg_count += entry->seg_count; |
| 727 | dma->page_count += entry->seg_count << page_order; |
| 728 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); |
| 729 | |
| 730 | up( &dev->struct_sem ); |
| 731 | |
| 732 | request.count = entry->buf_count; |
| 733 | request.size = size; |
| 734 | |
| 735 | if ( copy_to_user( argp, &request, sizeof(request) ) ) |
| 736 | return -EFAULT; |
| 737 | |
| 738 | atomic_dec( &dev->buf_alloc ); |
| 739 | return 0; |
| 740 | |
| 741 | } |
| 742 | |
| 743 | int drm_addbufs_sg( struct inode *inode, struct file *filp, |
| 744 | unsigned int cmd, unsigned long arg ) |
| 745 | { |
| 746 | drm_file_t *priv = filp->private_data; |
| 747 | drm_device_t *dev = priv->head->dev; |
| 748 | drm_device_dma_t *dma = dev->dma; |
| 749 | drm_buf_desc_t __user *argp = (void __user *)arg; |
| 750 | drm_buf_desc_t request; |
| 751 | drm_buf_entry_t *entry; |
| 752 | drm_buf_t *buf; |
| 753 | unsigned long offset; |
| 754 | unsigned long agp_offset; |
| 755 | int count; |
| 756 | int order; |
| 757 | int size; |
| 758 | int alignment; |
| 759 | int page_order; |
| 760 | int total; |
| 761 | int byte_count; |
| 762 | int i; |
| 763 | drm_buf_t **temp_buflist; |
| 764 | |
| 765 | if (!drm_core_check_feature(dev, DRIVER_SG)) return -EINVAL; |
| 766 | |
| 767 | if ( !dma ) return -EINVAL; |
| 768 | |
| 769 | if ( copy_from_user( &request, argp, sizeof(request) ) ) |
| 770 | return -EFAULT; |
| 771 | |
| 772 | count = request.count; |
| 773 | order = drm_order( request.size ); |
| 774 | size = 1 << order; |
| 775 | |
| 776 | alignment = (request.flags & _DRM_PAGE_ALIGN) |
| 777 | ? PAGE_ALIGN(size) : size; |
| 778 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
| 779 | total = PAGE_SIZE << page_order; |
| 780 | |
| 781 | byte_count = 0; |
| 782 | agp_offset = request.agp_start; |
| 783 | |
| 784 | DRM_DEBUG( "count: %d\n", count ); |
| 785 | DRM_DEBUG( "order: %d\n", order ); |
| 786 | DRM_DEBUG( "size: %d\n", size ); |
| 787 | DRM_DEBUG( "agp_offset: %lu\n", agp_offset ); |
| 788 | DRM_DEBUG( "alignment: %d\n", alignment ); |
| 789 | DRM_DEBUG( "page_order: %d\n", page_order ); |
| 790 | DRM_DEBUG( "total: %d\n", total ); |
| 791 | |
| 792 | if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return -EINVAL; |
| 793 | if ( dev->queue_count ) return -EBUSY; /* Not while in use */ |
| 794 | |
| 795 | spin_lock( &dev->count_lock ); |
| 796 | if ( dev->buf_use ) { |
| 797 | spin_unlock( &dev->count_lock ); |
| 798 | return -EBUSY; |
| 799 | } |
| 800 | atomic_inc( &dev->buf_alloc ); |
| 801 | spin_unlock( &dev->count_lock ); |
| 802 | |
| 803 | down( &dev->struct_sem ); |
| 804 | entry = &dma->bufs[order]; |
| 805 | if ( entry->buf_count ) { |
| 806 | up( &dev->struct_sem ); |
| 807 | atomic_dec( &dev->buf_alloc ); |
| 808 | return -ENOMEM; /* May only call once for each order */ |
| 809 | } |
| 810 | |
| 811 | if (count < 0 || count > 4096) { |
| 812 | up( &dev->struct_sem ); |
| 813 | atomic_dec( &dev->buf_alloc ); |
| 814 | return -EINVAL; |
| 815 | } |
| 816 | |
| 817 | entry->buflist = drm_alloc( count * sizeof(*entry->buflist), |
| 818 | DRM_MEM_BUFS ); |
| 819 | if ( !entry->buflist ) { |
| 820 | up( &dev->struct_sem ); |
| 821 | atomic_dec( &dev->buf_alloc ); |
| 822 | return -ENOMEM; |
| 823 | } |
| 824 | memset( entry->buflist, 0, count * sizeof(*entry->buflist) ); |
| 825 | |
| 826 | entry->buf_size = size; |
| 827 | entry->page_order = page_order; |
| 828 | |
| 829 | offset = 0; |
| 830 | |
| 831 | while ( entry->buf_count < count ) { |
| 832 | buf = &entry->buflist[entry->buf_count]; |
| 833 | buf->idx = dma->buf_count + entry->buf_count; |
| 834 | buf->total = alignment; |
| 835 | buf->order = order; |
| 836 | buf->used = 0; |
| 837 | |
| 838 | buf->offset = (dma->byte_count + offset); |
| 839 | buf->bus_address = agp_offset + offset; |
| 840 | buf->address = (void *)(agp_offset + offset + dev->sg->handle); |
| 841 | buf->next = NULL; |
| 842 | buf->waiting = 0; |
| 843 | buf->pending = 0; |
| 844 | init_waitqueue_head( &buf->dma_wait ); |
| 845 | buf->filp = NULL; |
| 846 | |
| 847 | buf->dev_priv_size = dev->driver->dev_priv_size; |
| 848 | buf->dev_private = drm_alloc( buf->dev_priv_size, |
| 849 | DRM_MEM_BUFS ); |
| 850 | if(!buf->dev_private) { |
| 851 | /* Set count correctly so we free the proper amount. */ |
| 852 | entry->buf_count = count; |
| 853 | drm_cleanup_buf_error(dev,entry); |
| 854 | up( &dev->struct_sem ); |
| 855 | atomic_dec( &dev->buf_alloc ); |
| 856 | return -ENOMEM; |
| 857 | } |
| 858 | |
| 859 | memset( buf->dev_private, 0, buf->dev_priv_size ); |
| 860 | |
| 861 | DRM_DEBUG( "buffer %d @ %p\n", |
| 862 | entry->buf_count, buf->address ); |
| 863 | |
| 864 | offset += alignment; |
| 865 | entry->buf_count++; |
| 866 | byte_count += PAGE_SIZE << page_order; |
| 867 | } |
| 868 | |
| 869 | DRM_DEBUG( "byte_count: %d\n", byte_count ); |
| 870 | |
| 871 | temp_buflist = drm_realloc( dma->buflist, |
| 872 | dma->buf_count * sizeof(*dma->buflist), |
| 873 | (dma->buf_count + entry->buf_count) |
| 874 | * sizeof(*dma->buflist), |
| 875 | DRM_MEM_BUFS ); |
| 876 | if(!temp_buflist) { |
| 877 | /* Free the entry because it isn't valid */ |
| 878 | drm_cleanup_buf_error(dev,entry); |
| 879 | up( &dev->struct_sem ); |
| 880 | atomic_dec( &dev->buf_alloc ); |
| 881 | return -ENOMEM; |
| 882 | } |
| 883 | dma->buflist = temp_buflist; |
| 884 | |
| 885 | for ( i = 0 ; i < entry->buf_count ; i++ ) { |
| 886 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
| 887 | } |
| 888 | |
| 889 | dma->buf_count += entry->buf_count; |
| 890 | dma->byte_count += byte_count; |
| 891 | |
| 892 | DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count ); |
| 893 | DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count ); |
| 894 | |
| 895 | up( &dev->struct_sem ); |
| 896 | |
| 897 | request.count = entry->buf_count; |
| 898 | request.size = size; |
| 899 | |
| 900 | if ( copy_to_user( argp, &request, sizeof(request) ) ) |
| 901 | return -EFAULT; |
| 902 | |
| 903 | dma->flags = _DRM_DMA_USE_SG; |
| 904 | |
| 905 | atomic_dec( &dev->buf_alloc ); |
| 906 | return 0; |
| 907 | } |
| 908 | |
| 909 | /** |
| 910 | * Add buffers for DMA transfers (ioctl). |
| 911 | * |
| 912 | * \param inode device inode. |
| 913 | * \param filp file pointer. |
| 914 | * \param cmd command. |
| 915 | * \param arg pointer to a drm_buf_desc_t request. |
| 916 | * \return zero on success or a negative number on failure. |
| 917 | * |
| 918 | * According with the memory type specified in drm_buf_desc::flags and the |
| 919 | * build options, it dispatches the call either to addbufs_agp(), |
| 920 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent |
| 921 | * PCI memory respectively. |
| 922 | */ |
| 923 | int drm_addbufs( struct inode *inode, struct file *filp, |
| 924 | unsigned int cmd, unsigned long arg ) |
| 925 | { |
| 926 | drm_buf_desc_t request; |
| 927 | drm_file_t *priv = filp->private_data; |
| 928 | drm_device_t *dev = priv->head->dev; |
| 929 | |
| 930 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
| 931 | return -EINVAL; |
| 932 | |
| 933 | if ( copy_from_user( &request, (drm_buf_desc_t __user *)arg, |
| 934 | sizeof(request) ) ) |
| 935 | return -EFAULT; |
| 936 | |
| 937 | #if __OS_HAS_AGP |
| 938 | if ( request.flags & _DRM_AGP_BUFFER ) |
| 939 | return drm_addbufs_agp( inode, filp, cmd, arg ); |
| 940 | else |
| 941 | #endif |
| 942 | if ( request.flags & _DRM_SG_BUFFER ) |
| 943 | return drm_addbufs_sg( inode, filp, cmd, arg ); |
| 944 | else |
| 945 | return drm_addbufs_pci( inode, filp, cmd, arg ); |
| 946 | } |
| 947 | |
| 948 | |
| 949 | /** |
| 950 | * Get information about the buffer mappings. |
| 951 | * |
| 952 | * This was originally mean for debugging purposes, or by a sophisticated |
| 953 | * client library to determine how best to use the available buffers (e.g., |
| 954 | * large buffers can be used for image transfer). |
| 955 | * |
| 956 | * \param inode device inode. |
| 957 | * \param filp file pointer. |
| 958 | * \param cmd command. |
| 959 | * \param arg pointer to a drm_buf_info structure. |
| 960 | * \return zero on success or a negative number on failure. |
| 961 | * |
| 962 | * Increments drm_device::buf_use while holding the drm_device::count_lock |
| 963 | * lock, preventing of allocating more buffers after this call. Information |
| 964 | * about each requested buffer is then copied into user space. |
| 965 | */ |
| 966 | int drm_infobufs( struct inode *inode, struct file *filp, |
| 967 | unsigned int cmd, unsigned long arg ) |
| 968 | { |
| 969 | drm_file_t *priv = filp->private_data; |
| 970 | drm_device_t *dev = priv->head->dev; |
| 971 | drm_device_dma_t *dma = dev->dma; |
| 972 | drm_buf_info_t request; |
| 973 | drm_buf_info_t __user *argp = (void __user *)arg; |
| 974 | int i; |
| 975 | int count; |
| 976 | |
| 977 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
| 978 | return -EINVAL; |
| 979 | |
| 980 | if ( !dma ) return -EINVAL; |
| 981 | |
| 982 | spin_lock( &dev->count_lock ); |
| 983 | if ( atomic_read( &dev->buf_alloc ) ) { |
| 984 | spin_unlock( &dev->count_lock ); |
| 985 | return -EBUSY; |
| 986 | } |
| 987 | ++dev->buf_use; /* Can't allocate more after this call */ |
| 988 | spin_unlock( &dev->count_lock ); |
| 989 | |
| 990 | if ( copy_from_user( &request, argp, sizeof(request) ) ) |
| 991 | return -EFAULT; |
| 992 | |
| 993 | for ( i = 0, count = 0 ; i < DRM_MAX_ORDER + 1 ; i++ ) { |
| 994 | if ( dma->bufs[i].buf_count ) ++count; |
| 995 | } |
| 996 | |
| 997 | DRM_DEBUG( "count = %d\n", count ); |
| 998 | |
| 999 | if ( request.count >= count ) { |
| 1000 | for ( i = 0, count = 0 ; i < DRM_MAX_ORDER + 1 ; i++ ) { |
| 1001 | if ( dma->bufs[i].buf_count ) { |
| 1002 | drm_buf_desc_t __user *to = &request.list[count]; |
| 1003 | drm_buf_entry_t *from = &dma->bufs[i]; |
| 1004 | drm_freelist_t *list = &dma->bufs[i].freelist; |
| 1005 | if ( copy_to_user( &to->count, |
| 1006 | &from->buf_count, |
| 1007 | sizeof(from->buf_count) ) || |
| 1008 | copy_to_user( &to->size, |
| 1009 | &from->buf_size, |
| 1010 | sizeof(from->buf_size) ) || |
| 1011 | copy_to_user( &to->low_mark, |
| 1012 | &list->low_mark, |
| 1013 | sizeof(list->low_mark) ) || |
| 1014 | copy_to_user( &to->high_mark, |
| 1015 | &list->high_mark, |
| 1016 | sizeof(list->high_mark) ) ) |
| 1017 | return -EFAULT; |
| 1018 | |
| 1019 | DRM_DEBUG( "%d %d %d %d %d\n", |
| 1020 | i, |
| 1021 | dma->bufs[i].buf_count, |
| 1022 | dma->bufs[i].buf_size, |
| 1023 | dma->bufs[i].freelist.low_mark, |
| 1024 | dma->bufs[i].freelist.high_mark ); |
| 1025 | ++count; |
| 1026 | } |
| 1027 | } |
| 1028 | } |
| 1029 | request.count = count; |
| 1030 | |
| 1031 | if ( copy_to_user( argp, &request, sizeof(request) ) ) |
| 1032 | return -EFAULT; |
| 1033 | |
| 1034 | return 0; |
| 1035 | } |
| 1036 | |
| 1037 | /** |
| 1038 | * Specifies a low and high water mark for buffer allocation |
| 1039 | * |
| 1040 | * \param inode device inode. |
| 1041 | * \param filp file pointer. |
| 1042 | * \param cmd command. |
| 1043 | * \param arg a pointer to a drm_buf_desc structure. |
| 1044 | * \return zero on success or a negative number on failure. |
| 1045 | * |
| 1046 | * Verifies that the size order is bounded between the admissible orders and |
| 1047 | * updates the respective drm_device_dma::bufs entry low and high water mark. |
| 1048 | * |
| 1049 | * \note This ioctl is deprecated and mostly never used. |
| 1050 | */ |
| 1051 | int drm_markbufs( struct inode *inode, struct file *filp, |
| 1052 | unsigned int cmd, unsigned long arg ) |
| 1053 | { |
| 1054 | drm_file_t *priv = filp->private_data; |
| 1055 | drm_device_t *dev = priv->head->dev; |
| 1056 | drm_device_dma_t *dma = dev->dma; |
| 1057 | drm_buf_desc_t request; |
| 1058 | int order; |
| 1059 | drm_buf_entry_t *entry; |
| 1060 | |
| 1061 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
| 1062 | return -EINVAL; |
| 1063 | |
| 1064 | if ( !dma ) return -EINVAL; |
| 1065 | |
| 1066 | if ( copy_from_user( &request, |
| 1067 | (drm_buf_desc_t __user *)arg, |
| 1068 | sizeof(request) ) ) |
| 1069 | return -EFAULT; |
| 1070 | |
| 1071 | DRM_DEBUG( "%d, %d, %d\n", |
| 1072 | request.size, request.low_mark, request.high_mark ); |
| 1073 | order = drm_order( request.size ); |
| 1074 | if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return -EINVAL; |
| 1075 | entry = &dma->bufs[order]; |
| 1076 | |
| 1077 | if ( request.low_mark < 0 || request.low_mark > entry->buf_count ) |
| 1078 | return -EINVAL; |
| 1079 | if ( request.high_mark < 0 || request.high_mark > entry->buf_count ) |
| 1080 | return -EINVAL; |
| 1081 | |
| 1082 | entry->freelist.low_mark = request.low_mark; |
| 1083 | entry->freelist.high_mark = request.high_mark; |
| 1084 | |
| 1085 | return 0; |
| 1086 | } |
| 1087 | |
| 1088 | /** |
| 1089 | * Unreserve the buffers in list, previously reserved using drmDMA. |
| 1090 | * |
| 1091 | * \param inode device inode. |
| 1092 | * \param filp file pointer. |
| 1093 | * \param cmd command. |
| 1094 | * \param arg pointer to a drm_buf_free structure. |
| 1095 | * \return zero on success or a negative number on failure. |
| 1096 | * |
| 1097 | * Calls free_buffer() for each used buffer. |
| 1098 | * This function is primarily used for debugging. |
| 1099 | */ |
| 1100 | int drm_freebufs( struct inode *inode, struct file *filp, |
| 1101 | unsigned int cmd, unsigned long arg ) |
| 1102 | { |
| 1103 | drm_file_t *priv = filp->private_data; |
| 1104 | drm_device_t *dev = priv->head->dev; |
| 1105 | drm_device_dma_t *dma = dev->dma; |
| 1106 | drm_buf_free_t request; |
| 1107 | int i; |
| 1108 | int idx; |
| 1109 | drm_buf_t *buf; |
| 1110 | |
| 1111 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
| 1112 | return -EINVAL; |
| 1113 | |
| 1114 | if ( !dma ) return -EINVAL; |
| 1115 | |
| 1116 | if ( copy_from_user( &request, |
| 1117 | (drm_buf_free_t __user *)arg, |
| 1118 | sizeof(request) ) ) |
| 1119 | return -EFAULT; |
| 1120 | |
| 1121 | DRM_DEBUG( "%d\n", request.count ); |
| 1122 | for ( i = 0 ; i < request.count ; i++ ) { |
| 1123 | if ( copy_from_user( &idx, |
| 1124 | &request.list[i], |
| 1125 | sizeof(idx) ) ) |
| 1126 | return -EFAULT; |
| 1127 | if ( idx < 0 || idx >= dma->buf_count ) { |
| 1128 | DRM_ERROR( "Index %d (of %d max)\n", |
| 1129 | idx, dma->buf_count - 1 ); |
| 1130 | return -EINVAL; |
| 1131 | } |
| 1132 | buf = dma->buflist[idx]; |
| 1133 | if ( buf->filp != filp ) { |
| 1134 | DRM_ERROR( "Process %d freeing buffer not owned\n", |
| 1135 | current->pid ); |
| 1136 | return -EINVAL; |
| 1137 | } |
| 1138 | drm_free_buffer( dev, buf ); |
| 1139 | } |
| 1140 | |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
| 1144 | /** |
| 1145 | * Maps all of the DMA buffers into client-virtual space (ioctl). |
| 1146 | * |
| 1147 | * \param inode device inode. |
| 1148 | * \param filp file pointer. |
| 1149 | * \param cmd command. |
| 1150 | * \param arg pointer to a drm_buf_map structure. |
| 1151 | * \return zero on success or a negative number on failure. |
| 1152 | * |
| 1153 | * Maps the AGP or SG buffer region with do_mmap(), and copies information |
| 1154 | * about each buffer into user space. The PCI buffers are already mapped on the |
| 1155 | * addbufs_pci() call. |
| 1156 | */ |
| 1157 | int drm_mapbufs( struct inode *inode, struct file *filp, |
| 1158 | unsigned int cmd, unsigned long arg ) |
| 1159 | { |
| 1160 | drm_file_t *priv = filp->private_data; |
| 1161 | drm_device_t *dev = priv->head->dev; |
| 1162 | drm_device_dma_t *dma = dev->dma; |
| 1163 | drm_buf_map_t __user *argp = (void __user *)arg; |
| 1164 | int retcode = 0; |
| 1165 | const int zero = 0; |
| 1166 | unsigned long virtual; |
| 1167 | unsigned long address; |
| 1168 | drm_buf_map_t request; |
| 1169 | int i; |
| 1170 | |
| 1171 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
| 1172 | return -EINVAL; |
| 1173 | |
| 1174 | if ( !dma ) return -EINVAL; |
| 1175 | |
| 1176 | spin_lock( &dev->count_lock ); |
| 1177 | if ( atomic_read( &dev->buf_alloc ) ) { |
| 1178 | spin_unlock( &dev->count_lock ); |
| 1179 | return -EBUSY; |
| 1180 | } |
| 1181 | dev->buf_use++; /* Can't allocate more after this call */ |
| 1182 | spin_unlock( &dev->count_lock ); |
| 1183 | |
| 1184 | if ( copy_from_user( &request, argp, sizeof(request) ) ) |
| 1185 | return -EFAULT; |
| 1186 | |
| 1187 | if ( request.count >= dma->buf_count ) { |
| 1188 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) || |
| 1189 | (drm_core_check_feature(dev, DRIVER_SG) && (dma->flags & _DRM_DMA_USE_SG)) ) { |
| 1190 | drm_map_t *map = dev->agp_buffer_map; |
| 1191 | |
| 1192 | if ( !map ) { |
| 1193 | retcode = -EINVAL; |
| 1194 | goto done; |
| 1195 | } |
| 1196 | |
| 1197 | #if LINUX_VERSION_CODE <= 0x020402 |
| 1198 | down( ¤t->mm->mmap_sem ); |
| 1199 | #else |
| 1200 | down_write( ¤t->mm->mmap_sem ); |
| 1201 | #endif |
| 1202 | virtual = do_mmap( filp, 0, map->size, |
| 1203 | PROT_READ | PROT_WRITE, |
| 1204 | MAP_SHARED, |
| 1205 | (unsigned long)map->offset ); |
| 1206 | #if LINUX_VERSION_CODE <= 0x020402 |
| 1207 | up( ¤t->mm->mmap_sem ); |
| 1208 | #else |
| 1209 | up_write( ¤t->mm->mmap_sem ); |
| 1210 | #endif |
| 1211 | } else { |
| 1212 | #if LINUX_VERSION_CODE <= 0x020402 |
| 1213 | down( ¤t->mm->mmap_sem ); |
| 1214 | #else |
| 1215 | down_write( ¤t->mm->mmap_sem ); |
| 1216 | #endif |
| 1217 | virtual = do_mmap( filp, 0, dma->byte_count, |
| 1218 | PROT_READ | PROT_WRITE, |
| 1219 | MAP_SHARED, 0 ); |
| 1220 | #if LINUX_VERSION_CODE <= 0x020402 |
| 1221 | up( ¤t->mm->mmap_sem ); |
| 1222 | #else |
| 1223 | up_write( ¤t->mm->mmap_sem ); |
| 1224 | #endif |
| 1225 | } |
| 1226 | if ( virtual > -1024UL ) { |
| 1227 | /* Real error */ |
| 1228 | retcode = (signed long)virtual; |
| 1229 | goto done; |
| 1230 | } |
| 1231 | request.virtual = (void __user *)virtual; |
| 1232 | |
| 1233 | for ( i = 0 ; i < dma->buf_count ; i++ ) { |
| 1234 | if ( copy_to_user( &request.list[i].idx, |
| 1235 | &dma->buflist[i]->idx, |
| 1236 | sizeof(request.list[0].idx) ) ) { |
| 1237 | retcode = -EFAULT; |
| 1238 | goto done; |
| 1239 | } |
| 1240 | if ( copy_to_user( &request.list[i].total, |
| 1241 | &dma->buflist[i]->total, |
| 1242 | sizeof(request.list[0].total) ) ) { |
| 1243 | retcode = -EFAULT; |
| 1244 | goto done; |
| 1245 | } |
| 1246 | if ( copy_to_user( &request.list[i].used, |
| 1247 | &zero, |
| 1248 | sizeof(zero) ) ) { |
| 1249 | retcode = -EFAULT; |
| 1250 | goto done; |
| 1251 | } |
| 1252 | address = virtual + dma->buflist[i]->offset; /* *** */ |
| 1253 | if ( copy_to_user( &request.list[i].address, |
| 1254 | &address, |
| 1255 | sizeof(address) ) ) { |
| 1256 | retcode = -EFAULT; |
| 1257 | goto done; |
| 1258 | } |
| 1259 | } |
| 1260 | } |
| 1261 | done: |
| 1262 | request.count = dma->buf_count; |
| 1263 | DRM_DEBUG( "%d buffers, retcode = %d\n", request.count, retcode ); |
| 1264 | |
| 1265 | if ( copy_to_user( argp, &request, sizeof(request) ) ) |
| 1266 | return -EFAULT; |
| 1267 | |
| 1268 | return retcode; |
| 1269 | } |
| 1270 | |