/*- * Copyright 2003 Eric Anholt * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * ERIC ANHOLT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "drmP.h" #include "drm.h" #include static int drm_name_info DRM_SYSCTL_HANDLER_ARGS; static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS; static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS; static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS; struct drm_sysctl_list { const char *name; int (*f) DRM_SYSCTL_HANDLER_ARGS; } drm_sysctl_list[] = { {"name", drm_name_info}, {"vm", drm_vm_info}, {"clients", drm_clients_info}, {"bufs", drm_bufs_info}, }; #define DRM_SYSCTL_ENTRIES (sizeof(drm_sysctl_list)/sizeof(drm_sysctl_list[0])) struct drm_sysctl_info { struct sysctl_ctx_list ctx; char name[2]; }; int drm_sysctl_init(drm_device_t *dev) { struct drm_sysctl_info *info; struct sysctl_oid *oid; struct sysctl_oid *top, *drioid; int i; info = malloc(sizeof *info, M_DRM, M_WAITOK | M_ZERO); if ( !info ) return 1; dev->sysctl = info; /* Add the sysctl node for DRI if it doesn't already exist */ drioid = SYSCTL_ADD_NODE( &info->ctx, &sysctl__hw_children, OID_AUTO, "dri", CTLFLAG_RW, NULL, "DRI Graphics"); if (!drioid) return 1; /* Find the next free slot under hw.dri */ i = 0; SLIST_FOREACH(oid, SYSCTL_CHILDREN(drioid), oid_link) { if (i <= oid->oid_arg2) i = oid->oid_arg2 + 1; } if (i>9) return 1; /* Add the hw.dri.x for our device */ info->name[0] = '0' + i; info->name[1] = 0; top = SYSCTL_ADD_NODE( &info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, info->name, CTLFLAG_RW, NULL, NULL); if (!top) return 1; for (i = 0; i < DRM_SYSCTL_ENTRIES; i++) { oid = SYSCTL_ADD_OID(&info->ctx, SYSCTL_CHILDREN(top), OID_AUTO, drm_sysctl_list[i].name, CTLTYPE_INT | CTLFLAG_RD, dev, 0, drm_sysctl_list[i].f, "A", NULL); if (!oid) return 1; } SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(top), OID_AUTO, "debug", CTLFLAG_RW, &drm_debug_flag, sizeof(drm_debug_flag), "Enable debugging output"); return 0; } int drm_sysctl_cleanup(drm_device_t *dev) { int error; error = sysctl_ctx_free( &dev->sysctl->ctx ); free(dev->sysctl, M_DRM); dev->sysctl = NULL; return error; } #define DRM_SYSCTL_PRINT(fmt, arg...) \ do { \ snprintf(buf, sizeof(buf), fmt, ##arg); \ retcode = SYSCTL_OUT(req, buf, strlen(buf)); \ if (retcode) \ goto done; \ } while (0) static int drm_name_info DRM_SYSCTL_HANDLER_ARGS { drm_device_t *dev = arg1; char buf[128]; int retcode; int hasunique = 0; DRM_SYSCTL_PRINT("%s 0x%x", dev->driver.name, dev2udev(dev->devnode)); DRM_LOCK(); if (dev->unique) { snprintf(buf, sizeof(buf), " %s", dev->unique); hasunique = 1; } DRM_UNLOCK(); if (hasunique) SYSCTL_OUT(req, buf, strlen(buf)); SYSCTL_OUT(req, "", 1); done: return retcode; } static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS { drm_device_t *dev = arg1; drm_local_map_t *map, *tempmaps; const char *types[] = { "FB", "REG", "SHM", "AGP", "SG" }; const char *type, *yesno; int i, mapcount; char buf[128]; int retcode; /* We can't hold the lock while doing SYSCTL_OUTs, so allocate a * temporary copy of all the map entries and then SYSCTL_OUT that. */ DRM_LOCK(); mapcount = 0; TAILQ_FOREACH(map, &dev->maplist, link) mapcount++; tempmaps = malloc(sizeof(drm_local_map_t) * mapcount, M_DRM, M_NOWAIT); if (tempmaps == NULL) { DRM_UNLOCK(); return ENOMEM; } i = 0; TAILQ_FOREACH(map, &dev->maplist, link) tempmaps[i++] = *map; DRM_UNLOCK(); DRM_SYSCTL_PRINT("\nslot offset size type flags " "address mtrr\n"); for (i = 0; i < mapcount; i++) { map = &tempmaps[i]; if (map->type < 0 || map->type > 4) type = "??"; else type = types[map->type]; if (!map->mtrr) yesno = "no"; else yesno = "yes"; DRM_SYSCTL_PRINT( "%4d 0x%08lx 0x%08lx %4.4s 0x%02x 0x%08lx %s\n", i, map->offset, map->size, type, map->flags, (unsigned long)map->handle, yesno); } SYSCTL_OUT(req, "", 1); done: free(tempmaps, M_DRM); return retcode; } static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS { drm_device_t *dev = arg1; drm_device_dma_t *dma = dev->dma; drm_device_dma_t tempdma; int *templists; int i; char buf[128]; int retcode; /* We can't hold the locks around DRM_SYSCTL_PRINT, so make a temporary * copy of the whole structure and the relevant data from buflist. */ DRM_LOCK(); if (dma == NULL) { DRM_UNLOCK(); return 0; } DRM_SPINLOCK(&dev->dma_lock); tempdma = *dma; templists = malloc(sizeof(int) * dma->buf_count, M_DRM, M_NOWAIT); for (i = 0; i < dma->buf_count; i++) templists[i] = dma->buflist[i]->list; dma = &tempdma; DRM_SPINUNLOCK(&dev->dma_lock); DRM_UNLOCK(); DRM_SYSCTL_PRINT("\n o size count free segs pages kB\n"); for (i = 0; i <= DRM_MAX_ORDER; i++) { if (dma->bufs[i].buf_count) DRM_SYSCTL_PRINT("%2d %8d %5d %5d %5d %5d %5d\n", i, dma->bufs[i].buf_size, dma->bufs[i].buf_count, atomic_read(&dma->bufs[i] .freelist.count), dma->bufs[i].seg_count, dma->bufs[i].seg_count *(1 << dma->bufs[i].page_order), (dma->bufs[i].seg_count * (1 << dma->bufs[i].page_order)) * PAGE_SIZE / 1024); } DRM_SYSCTL_PRINT("\n"); for (i = 0; i < dma->buf_count; i++) { if (i && !(i%32)) DRM_SYSCTL_PRINT("\n"); DRM_SYSCTL_PRINT(" %d", templists[i]); } DRM_SYSCTL_PRINT("\n"); SYSCTL_OUT(req, "", 1); done: free(templists, M_DRM); return retcode; } static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS { drm_device_t *dev = arg1; drm_file_t *priv, *tempprivs; char buf[128]; int retcode; int privcount, i; DRM_LOCK(); privcount = 0; TAILQ_FOREACH(priv, &dev->files, link) privcount++; tempprivs = malloc(sizeof(drm_file_t) * privcount, M_DRM, M_NOWAIT); if (tempprivs == NULL) { DRM_UNLOCK(); return ENOMEM; } i = 0; TAILQ_FOREACH(priv, &dev->files, link) tempprivs[i++] = *priv; DRM_UNLOCK(); DRM_SYSCTL_PRINT("\na dev pid uid magic ioctls\n"); for (i = 0; i < privcount; i++) { priv = &tempprivs[i]; DRM_SYSCTL_PRINT("%c %3d %5d %5d %10u %10lu\n", priv->authenticated ? 'y' : 'n', priv->minor, priv->pid, priv->uid, priv->magic, priv->ioctl_count); } SYSCTL_OUT(req, "", 1); done: free(tempprivs, M_DRM); return retcode; } f='#n145'>145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 
/**
 * \file drm_agpsupport.c
 * DRM support for AGP/GART backend
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 */

/*
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include "drmP.h"
#include <linux/module.h>

#if __OS_HAS_AGP

/**
 * Get AGP information.
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \param cmd command.
 * \param arg pointer to a (output) drm_agp_info structure.
 * \return zero on success or a negative number on failure.
 *
 * Verifies the AGP device has been initialized and acquired and fills in the
 * drm_agp_info structure with the information in drm_agp_head::agp_info.
 */
int drm_agp_info(drm_device_t * dev, drm_agp_info_t *info)
{
	DRM_AGP_KERN *kern;

	if (!dev->agp || !dev->agp->acquired)
		return -EINVAL;

	kern = &dev->agp->agp_info;
	info->agp_version_major = kern->version.major;
	info->agp_version_minor = kern->version.minor;
	info->mode = kern->mode;
	info->aperture_base = kern->aper_base;
	info->aperture_size = kern->aper_size * 1024 * 1024;
	info->memory_allowed = kern->max_memory << PAGE_SHIFT;
	info->memory_used = kern->current_memory << PAGE_SHIFT;
	info->id_vendor = kern->device->vendor;
	info->id_device = kern->device->device;

	return 0;
}
EXPORT_SYMBOL(drm_agp_info);

int drm_agp_info_ioctl(struct inode *inode, struct file *filp,
		 unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	drm_agp_info_t info;
	int err;

	err = drm_agp_info(dev, &info);
	if (err)
		return err;
	
	if (copy_to_user((drm_agp_info_t __user *) arg, &info, sizeof(info)))
		return -EFAULT;
	return 0;
}

/**
 * Acquire the AGP device
 *
 * \param dev DRM device that is to acquire AGP.
 * \return zero on success or a negative number on failure.
 *
 * Verifies the AGP device hasn't been acquired before and calls
 * \c agp_backend_acquire.
 */
int drm_agp_acquire(drm_device_t * dev)
{
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)
	int retcode;
#endif

	if (!dev->agp)
		return -ENODEV;
	if (dev->agp->acquired)
		return -EBUSY;
#ifndef VMAP_4_ARGS
	if (dev->agp->cant_use_aperture)
		return -EINVAL;
#endif
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)
	if ((retcode = agp_backend_acquire()))
		return retcode;
#else
	if (!(dev->agp->bridge = agp_backend_acquire(dev->pdev)))
		return -ENODEV;
#endif

	dev->agp->acquired = 1;
	return 0;
}
EXPORT_SYMBOL(drm_agp_acquire);

/**
 * Acquire the AGP device (ioctl).
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \param cmd command.
 * \param arg user argument.
 * \return zero on success or a negative number on failure.
 *
 * Verifies the AGP device hasn't been acquired before and calls
 * \c agp_backend_acquire.
 */
int drm_agp_acquire_ioctl(struct inode *inode, struct file *filp,
			  unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	
	return drm_agp_acquire( (drm_device_t *) priv->head->dev );
}

/**
 * Release the AGP device
 *
 * \param dev DRM device that is to release AGP.
 * \return zero on success or a negative number on failure.
 *
 * Verifies the AGP device has been acquired and calls \c agp_backend_release.
 */
int drm_agp_release(drm_device_t *dev)
{
	if (!dev->agp || !dev->agp->acquired)
		return -EINVAL;
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)
	agp_backend_release();
#else
	agp_backend_release(dev->agp->bridge);
#endif
	dev->agp->acquired = 0;
	return 0;

}
EXPORT_SYMBOL(drm_agp_release);

int drm_agp_release_ioctl(struct inode *inode, struct file *filp,
			  unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	
	return drm_agp_release(dev);
}

/**
 * Enable the AGP bus.
 *
 * \param dev DRM device that has previously acquired AGP.
 * \param mode Requested AGP mode.
 * \return zero on success or a negative number on failure.
 *
 * Verifies the AGP device has been acquired but not enabled, and calls
 * \c agp_enable.
 */
int drm_agp_enable(drm_device_t *dev, drm_agp_mode_t mode)
{
	if (!dev->agp || !dev->agp->acquired)
		return -EINVAL;

	dev->agp->mode = mode.mode;
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)
	agp_enable(mode.mode);
#else
	agp_enable(dev->agp->bridge, mode.mode);
#endif
	dev->agp->base = dev->agp->agp_info.aper_base;
	dev->agp->enabled = 1;
	return 0;
}
EXPORT_SYMBOL(drm_agp_enable);

int drm_agp_enable_ioctl(struct inode *inode, struct file *filp,
		   unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	drm_agp_mode_t mode;


	if (copy_from_user(&mode, (drm_agp_mode_t __user *) arg, sizeof(mode)))
		return -EFAULT;

	return drm_agp_enable(dev, mode);
}

/**
 * Allocate AGP memory.
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \param cmd command.
 * \param arg pointer to a drm_agp_buffer structure.
 * \return zero on success or a negative number on failure.
 *
 * Verifies the AGP device is present and has been acquired, allocates the
 * memory via alloc_agp() and creates a drm_agp_mem entry for it.
 */
int drm_agp_alloc(struct inode *inode, struct file *filp,
		  unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	drm_agp_buffer_t request;
	drm_agp_mem_t *entry;
	DRM_AGP_MEM *memory;
	unsigned long pages;
	u32 type;
	drm_agp_buffer_t __user *argp = (void __user *)arg;

	if (!dev->agp || !dev->agp->acquired)
		return -EINVAL;
	if (copy_from_user(&request, argp, sizeof(request)))
		return -EFAULT;
	if (!(entry = drm_alloc(sizeof(*entry), DRM_MEM_AGPLISTS)))
		return -ENOMEM;

	memset(entry, 0, sizeof(*entry));

	pages = (request.size + PAGE_SIZE - 1) / PAGE_SIZE;
	type = (u32) request.type;
	if (!(memory = drm_alloc_agp(dev, pages, type))) {
		drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
		return -ENOMEM;
	}

	entry->handle = (unsigned long)memory->key + 1;
	entry->memory = memory;
	entry->bound = 0;
	entry->pages = pages;
	entry->prev = NULL;
	entry->next = dev->agp->memory;
	if (dev->agp->memory)
		dev->agp->memory->prev = entry;
	dev->agp->memory = entry;

	request.handle = entry->handle;
	request.physical = memory->physical;

	if (copy_to_user(argp, &request, sizeof(request))) {
		dev->agp->memory = entry->next;
		dev->agp->memory->prev = NULL;
		drm_free_agp(memory, pages);
		drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
		return -EFAULT;
	}
	return 0;
}

/**
 * Search for the AGP memory entry associated with a handle.
 *
 * \param dev DRM device structure.
 * \param handle AGP memory handle.
 * \return pointer to the drm_agp_mem structure associated with \p handle.
 *
 * Walks through drm_agp_head::memory until finding a matching handle.
 */
static drm_agp_mem_t *drm_agp_lookup_entry(drm_device_t * dev,
					   unsigned long handle)
{
	drm_agp_mem_t *entry;

	for (entry = dev->agp->memory; entry; entry = entry->next) {
		if (entry->handle == handle)
			return entry;
	}
	return NULL;
}

/**
 * Unbind AGP memory from the GATT (ioctl).
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \param cmd command.
 * \param arg pointer to a drm_agp_binding structure.
 * \return zero on success or a negative number on failure.
 *
 * Verifies the AGP device is present and acquired, looks-up the AGP memory
 * entry and passes it to the unbind_agp() function.
 */
int drm_agp_unbind(struct inode *inode, struct file *filp,
		   unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	drm_agp_binding_t request;
	drm_agp_mem_t *entry;
	int ret;

	if (!dev->agp || !dev->agp->acquired)
		return -EINVAL;
	if (copy_from_user
	    (&request, (drm_agp_binding_t __user *) arg, sizeof(request)))
		return -EFAULT;
	if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
		return -EINVAL;
	if (!entry->bound)
		return -EINVAL;
	ret = drm_unbind_agp(entry->memory);
	if (ret == 0)
		entry->bound = 0;
	return ret;
}

/**
 * Bind AGP memory into the GATT (ioctl)
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \param cmd command.
 * \param arg pointer to a drm_agp_binding structure.
 * \return zero on success or a negative number on failure.
 *
 * Verifies the AGP device is present and has been acquired and that no memory
 * is currently bound into the GATT. Looks-up the AGP memory entry and passes
 * it to bind_agp() function.
 */
int drm_agp_bind(struct inode *inode, struct file *filp,
		 unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	drm_agp_binding_t request;
	drm_agp_mem_t *entry;
	int retcode;
	int page;

	if (!dev->agp || !dev->agp->acquired)
		return -EINVAL;
	if (copy_from_user
	    (&request, (drm_agp_binding_t __user *) arg, sizeof(request)))
		return -EFAULT;
	if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
		return -EINVAL;
	if (entry->bound)
		return -EINVAL;
	page = (request.offset + PAGE_SIZE - 1) / PAGE_SIZE;
	if ((retcode = drm_bind_agp(entry->memory, page)))
		return retcode;
	entry->bound = dev->agp->base + (page << PAGE_SHIFT);
	DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n",
		  dev->agp->base, entry->bound);
	return 0;
}

/**
 * Free AGP memory (ioctl).
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \param cmd command.
 * \param arg pointer to a drm_agp_buffer structure.
 * \return zero on success or a negative number on failure.
 *
 * Verifies the AGP device is present and has been acquired and looks up the
 * AGP memory entry. If the memory it's currently bound, unbind it via
 * unbind_agp(). Frees it via free_agp() as well as the entry itself
 * and unlinks from the doubly linked list it's inserted in.
 */
int drm_agp_free(struct inode *inode, struct file *filp,
		 unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	drm_agp_buffer_t request;
	drm_agp_mem_t *entry;

	if (!dev->agp || !dev->agp->acquired)
		return -EINVAL;
	if (copy_from_user
	    (&request, (drm_agp_buffer_t __user *) arg, sizeof(request)))
		return -EFAULT;
	if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
		return -EINVAL;
	if (entry->bound)
		drm_unbind_agp(entry->memory);

	if (entry->prev)
		entry->prev->next = entry->next;
	else
		dev->agp->memory = entry->next;

	if (entry->next)
		entry->next->prev = entry->prev;

	drm_free_agp(entry->memory, entry->pages);
	drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
	return 0;
}

/**
 * Initialize the AGP resources.
 *
 * \return pointer to a drm_agp_head structure.
 *
 * Gets the drm_agp_t structure which is made available by the agpgart module
 * via the inter_module_* functions. Creates and initializes a drm_agp_head
 * structure.
 */
drm_agp_head_t *drm_agp_init(drm_device_t *dev)
{
	drm_agp_head_t *head = NULL;

	if (!(head = drm_alloc(sizeof(*head), DRM_MEM_AGPLISTS)))
		return NULL;
	memset((void *)head, 0, sizeof(*head));

#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)
	agp_copy_info(&head->agp_info);
#else
	head->bridge = agp_find_bridge(dev->pdev);
	if (!head->bridge) {
		if (!(head->bridge = agp_backend_acquire(dev->pdev))) {
			drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS);
			return NULL;
	}
		agp_copy_info(head->bridge, &head->agp_info);
		agp_backend_release(head->bridge);
	} else {
		agp_copy_info(head->bridge, &head->agp_info);
	}
#endif
	if (head->agp_info.chipset == NOT_SUPPORTED) {
		drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS);
		return NULL;
	}
	head->memory = NULL;
	head->cant_use_aperture = head->agp_info.cant_use_aperture;
	head->page_mask = head->agp_info.page_mask;
	return head;
}

/** Calls agp_allocate_memory() */
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)
DRM_AGP_MEM *drm_agp_allocate_memory(size_t pages, u32 type)
{
	return agp_allocate_memory(pages, type);
}
#else
DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data *bridge, size_t pages, u32 type)
{
	return agp_allocate_memory(bridge, pages, type);
}
#endif

/** Calls agp_free_memory() */
int drm_agp_free_memory(DRM_AGP_MEM * handle)
{
	if (!handle)
		return 0;
	agp_free_memory(handle);
	return 1;
}

/** Calls agp_bind_memory() */
int drm_agp_bind_memory(DRM_AGP_MEM * handle, off_t start)
{
	if (!handle)
		return -EINVAL;
	return agp_bind_memory(handle, start);
}
EXPORT_SYMBOL(drm_agp_bind_memory);

/** Calls agp_unbind_memory() */
int drm_agp_unbind_memory(DRM_AGP_MEM * handle)
{
	if (!handle)
		return -EINVAL;
	return agp_unbind_memory(handle);
}

#endif				/* __OS_HAS_AGP */
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-10 10:36:01 +0000