summaryrefslogtreecommitdiff
path: root/linux
AgeCommit message (Expand)Author
2001-08-07Avoid compiler warning about r_list being used uninitialized.Jeff Hartmann
2001-08-07Lots of DRM fixes: added new pieces of template code so the ffb driver canJeff Hartmann
2001-07-30Merge the multihead-1-0-0 branch into the trunk, with the exception of theDavid Dawes
2001-07-23Fixes that allow the modules to be built into the kernelJeff Hartmann
2001-07-20Merge checker fixes from Alan Cox made to the drm in the ac kernel tree.Jeff Hartmann
2001-07-20Remove module name hacks because we aren't going to implement this anymoreJeff Hartmann
2001-07-18Add module version name at a lower layer of the code, allows things to beJeff Hartmann
2001-07-17Someone forgot to bump the r128 and i810 drivers properly before the 4.1.0Jeff Hartmann
2001-07-16Added version string to the end of the kernel module name. This allowsJeff Hartmann
2001-07-16i810 drm security fixJeff Hartmann
2001-07-13Fix typo in XFREE86_VERSION().Gareth Hughes
2001-06-18Fix 5 security bugs found by the Stanford toolsJeff Hartmann
2001-06-18Forgot to bump date stamp.Gareth Hughes
2001-06-18Enable shared IRQs in DMA template, use in i810 driver.Gareth Hughes
2001-06-14First pass of 4.1.0 merge.David Dawes
2001-06-14Import of XFree86 4.1.0David Dawes
2001-05-23Only authenticated clients can mmap() (Jeff Hartmann).Gareth Hughes
2001-05-17Make the SiS module work again. At least glxinfo reports it's working, yetAlan Hourihane
2001-05-14finish struct stat type cleanup Fix a build dependencies for the tdfx drmDavid Dawes
2001-05-03add new fileAlan Hourihane
2001-05-03Make SiS driver compile with the new templated format. Not tested. minorAlan Hourihane
2001-05-03remove deprecated fileAlan Hourihane
2001-05-01Import of XFree86 4.0.99.3David Dawes
2001-04-30fix build of i810 kernel driver for 2.4.3 or greater kernelsAlan Hourihane
2001-04-30- PCIGART patches for Alpha from CompaqKevin E Martin
2001-04-21include linux/sisfb.h, per David GaarenstroomBrian Paul
2001-04-16- Fix typo and remove magic numbersKevin E Martin
2001-04-09Import -f XFree86 4.0.99.2David Dawes
2001-04-06- Fix typoKevin E Martin
2001-04-06search /lib/modules/<version>/build/include first, then the others....Alan Hourihane
2001-04-06Handle drivers that don't have __HAVE_SG defined.Alan Hourihane
2001-04-05Merged ati-pcigart-1-0-0Kevin E Martin
2001-04-03include 2.4.2Alan Hourihane
2001-04-03make 2.4.2 -> 2.4.3 change conditional. works with older than 2.4.3 kernelsAlan Hourihane
2001-04-02Update radeon DRM to v1.1.0 (texture upload changes).Gareth Hughes
2001-03-30merge in 2.4.3 kernel change.Alan Hourihane
2001-03-21Move #include <linux/config.h> inside the __linux__ #ifdef, so that itDavid Dawes
2001-03-21- Fix MGA header info.Gareth Hughes
2001-03-21Remove compiler warnings, minor cleanups.Gareth Hughes
2001-03-19merge/build fixDavid Dawes
2001-03-19Initial XFree86 4.0.99.1 merge.David Dawes
2001-03-19Import of XFree86 4.0.99.1David Dawes
2001-03-19Update version, date stamp.Gareth Hughes
2001-03-19Remove PRIMPTR completely.Gareth Hughes
2001-03-19Try this...Gareth Hughes
2001-03-18__REALLY_HAVE_MTRR, vmalloc_32 fixes from Jeff Wiedemeier.Gareth Hughes
2001-03-14Merged sarea-1-0-0Kevin E Martin
2001-03-12Try that again...Gareth Hughes
2001-03-08Fix ring space calculations, tests. Based on patch by Bruce Stockwell.Gareth Hughes
2001-03-07Change error message to debug message when client dies while holding theGareth Hughes
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-01 20:23:20 +0000
1'>391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 
/**
 * \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(drm_device_t *dev, drm_agp_buffer_t *request)
{
	drm_agp_mem_t *entry;
	DRM_AGP_MEM *memory;
	unsigned long pages;
	u32 type;

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

	return 0;
}
EXPORT_SYMBOL(drm_agp_alloc);


int drm_agp_alloc_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_buffer_t request;
	drm_agp_buffer_t __user *argp = (void __user *)arg;
	int err;

	if (copy_from_user(&request, argp, sizeof(request)))
		return -EFAULT;

	err = drm_agp_alloc(dev, &request);
	if (err)
		return err;

	if (copy_to_user(argp, &request, sizeof(request))) {
		drm_agp_mem_t *entry = dev->agp->memory;

		dev->agp->memory = entry->next;
		dev->agp->memory->prev = NULL;
		drm_free_agp(entry->memory, entry->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(drm_device_t *dev, drm_agp_binding_t *request)
{
	drm_agp_mem_t *entry;
	int ret;

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


int drm_agp_unbind_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_binding_t request;

	if (copy_from_user
	    (&request, (drm_agp_binding_t __user *) arg, sizeof(request)))
		return -EFAULT;

	return drm_agp_unbind(dev, &request);
}


/**
 * 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(drm_device_t *dev, drm_agp_binding_t *request)
{
	drm_agp_mem_t *entry;
	int retcode;
	int page;

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


int drm_agp_bind_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_binding_t request;

	if (copy_from_user
	    (&request, (drm_agp_binding_t __user *) arg, sizeof(request)))
		return -EFAULT;

	return drm_agp_bind(dev, &request);
}


/**
 * 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(drm_device_t *dev, drm_agp_buffer_t *request)
{
	drm_agp_mem_t *entry;

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



int drm_agp_free_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_buffer_t request;

	if (copy_from_user
	    (&request, (drm_agp_buffer_t __user *) arg, sizeof(request)))
		return -EFAULT;

	return drm_agp_free(dev, &request);
}


/**
 * 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 2025-10-01 20:23:20 +0000