[deliverable/linux.git] / drivers / char / drm / drm_agpsupport.c

/**
 * \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 file_priv DRM file private.
 * \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(struct drm_device *dev, struct drm_agp_info *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 drm_file *file_priv,
		       unsigned int cmd, unsigned long arg)
{
	struct drm_device *dev = file_priv->head->dev;
	struct drm_agp_info info;
	int err;

	err = drm_agp_info(dev, &info);
	if (err)
		return err;

	if (copy_to_user((struct drm_agp_info __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(struct drm_device * dev)
{
	if (!dev->agp)
		return -ENODEV;
	if (dev->agp->acquired)
		return -EBUSY;
	if (!(dev->agp->bridge = agp_backend_acquire(dev->pdev)))
		return -ENODEV;
	dev->agp->acquired = 1;
	return 0;
}

EXPORT_SYMBOL(drm_agp_acquire);

/**
 * Acquire the AGP device (ioctl).
 *
 * \param inode device inode.
 * \param file_priv DRM file private.
 * \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 drm_file *file_priv,
			  unsigned int cmd, unsigned long arg)
{
	return drm_agp_acquire((struct drm_device *) file_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(struct drm_device * dev)
{
	if (!dev->agp || !dev->agp->acquired)
		return -EINVAL;
	agp_backend_release(dev->agp->bridge);
	dev->agp->acquired = 0;
	return 0;
}
EXPORT_SYMBOL(drm_agp_release);

int drm_agp_release_ioctl(struct inode *inode, struct drm_file *file_priv,
			  unsigned int cmd, unsigned long arg)
{
	struct drm_device *dev = file_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(struct drm_device * dev, struct drm_agp_mode mode)
{
	if (!dev->agp || !dev->agp->acquired)
		return -EINVAL;

	dev->agp->mode = mode.mode;
	agp_enable(dev->agp->bridge, mode.mode);
	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 drm_file *file_priv,
			 unsigned int cmd, unsigned long arg)
{
	struct drm_device *dev = file_priv->head->dev;
	struct drm_agp_mode mode;

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

	return drm_agp_enable(dev, mode);
}

/**
 * Allocate AGP memory.
 *
 * \param inode device inode.
 * \param file_priv file private 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 drm_device *dev, struct drm_agp_buffer *request)
{
	struct drm_agp_mem *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;
	list_add(&entry->head, &dev->agp->memory);

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

	return 0;
}
EXPORT_SYMBOL(drm_agp_alloc);

int drm_agp_alloc_ioctl(struct inode *inode, struct drm_file *file_priv,
			unsigned int cmd, unsigned long arg)
{
	struct drm_device *dev = file_priv->head->dev;
	struct drm_agp_buffer request;
	struct drm_agp_buffer __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))) {
		struct drm_agp_mem *entry;
		list_for_each_entry(entry, &dev->agp->memory, head) {
			if (entry->handle == request.handle)
				break;
		}
		list_del(&entry->head);
		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 struct drm_agp_mem *drm_agp_lookup_entry(struct drm_device * dev,
					   unsigned long handle)
{
	struct drm_agp_mem *entry;

	list_for_each_entry(entry, &dev->agp->memory, head) {
		if (entry->handle == handle)
			return entry;
	}
	return NULL;
}

/**
 * Unbind AGP memory from the GATT (ioctl).
 *
 * \param inode device inode.
 * \param file_priv DRM file private.
 * \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 drm_device *dev, struct drm_agp_binding *request)
{
	struct drm_agp_mem *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 drm_file *file_priv,
			 unsigned int cmd, unsigned long arg)
{
	struct drm_device *dev = file_priv->head->dev;
	struct drm_agp_binding request;

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

	return drm_agp_unbind(dev, &request);
}

/**
 * Bind AGP memory into the GATT (ioctl)
 *
 * \param inode device inode.
 * \param file_priv DRM file private.
 * \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 drm_device *dev, struct drm_agp_binding *request)
{
	struct drm_agp_mem *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 drm_file *file_priv,
		       unsigned int cmd, unsigned long arg)
{
	struct drm_device *dev = file_priv->head->dev;
	struct drm_agp_binding request;

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

	return drm_agp_bind(dev, &request);
}

/**
 * Free AGP memory (ioctl).
 *
 * \param inode device inode.
 * \param file_priv DRM file private.
 * \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 drm_device *dev, struct drm_agp_buffer *request)
{
	struct drm_agp_mem *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);

	list_del(&entry->head);

	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 drm_file *file_priv,
		       unsigned int cmd, unsigned long arg)
{
	struct drm_device *dev = file_priv->head->dev;
	struct drm_agp_buffer request;

	if (copy_from_user
	    (&request, (struct drm_agp_buffer __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.
 */
struct drm_agp_head *drm_agp_init(struct drm_device *dev)
{
	struct drm_agp_head *head = NULL;

	if (!(head = drm_alloc(sizeof(*head), DRM_MEM_AGPLISTS)))
		return NULL;
	memset((void *)head, 0, sizeof(*head));
	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);
	}
	if (head->agp_info.chipset == NOT_SUPPORTED) {
		drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS);
		return NULL;
	}
	INIT_LIST_HEAD(&head->memory);
	head->cant_use_aperture = head->agp_info.cant_use_aperture;
	head->page_mask = head->agp_info.page_mask;

	return head;
}

/** Calls agp_allocate_memory() */
DRM_AGP_MEM *drm_agp_allocate_memory(struct agp_bridge_data * bridge,
				     size_t pages, u32 type)
{
	return agp_allocate_memory(bridge, pages, type);
}

/** 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);
}

/** 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 */
Commit	Line	Data
1da177e4	1	/**
d985c108	2	* \file drm_agpsupport.c
1da177e4	3	* DRM support for AGP/GART backend
b5e89ed5	4	*
1da177e4 LT	5	* \author Rickard E. (Rik) Faith <faith@valinux.com>
	6	* \author Gareth Hughes <gareth@valinux.com>
	7	*/
	8
	9	/*
	10	* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
	11	* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
	12	* All Rights Reserved.
	13	*
	14	* Permission is hereby granted, free of charge, to any person obtaining a
	15	* copy of this software and associated documentation files (the "Software"),
	16	* to deal in the Software without restriction, including without limitation
	17	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	18	* and/or sell copies of the Software, and to permit persons to whom the
	19	* Software is furnished to do so, subject to the following conditions:
	20	*
	21	* The above copyright notice and this permission notice (including the next
	22	* paragraph) shall be included in all copies or substantial portions of the
	23	* Software.
	24	*
	25	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	26	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	27	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	28	* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
	29	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	30	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	31	* OTHER DEALINGS IN THE SOFTWARE.
	32	*/
	33
	34	#include "drmP.h"
	35	#include <linux/module.h>
	36
	37	#if __OS_HAS_AGP
	38
	39	/**
7ab98401	40	* Get AGP information.
1da177e4 LT	41	*
1da177e4 LT	42	* \param inode device inode.
6c340eac	43	* \param file_priv DRM file private.
1da177e4 LT	44	* \param cmd command.
	45	* \param arg pointer to a (output) drm_agp_info structure.
	46	* \return zero on success or a negative number on failure.
	47	*
	48	* Verifies the AGP device has been initialized and acquired and fills in the
	49	* drm_agp_info structure with the information in drm_agp_head::agp_info.
	50	*/
84b1fd10	51	int drm_agp_info(struct drm_device dev, struct drm_agp_info info)
1da177e4	52	{
b5e89ed5	53	DRM_AGP_KERN *kern;
1da177e4 LT	54
	55	if (!dev->agp \|\| !dev->agp->acquired)
	56	return -EINVAL;
	57
b5e89ed5	58	kern = &dev->agp->agp_info;
7ab98401 DA	59	info->agp_version_major = kern->version.major;
7ab98401 DA	60	info->agp_version_minor = kern->version.minor;
b5e89ed5 DA	61	info->mode = kern->mode;
	62	info->aperture_base = kern->aper_base;
	63	info->aperture_size = kern->aper_size * 1024 * 1024;
	64	info->memory_allowed = kern->max_memory << PAGE_SHIFT;
	65	info->memory_used = kern->current_memory << PAGE_SHIFT;
	66	info->id_vendor = kern->device->vendor;
	67	info->id_device = kern->device->device;
7ab98401 DA	68
	69	return 0;
	70	}
b5e89ed5	71
7ab98401 DA	72	EXPORT_SYMBOL(drm_agp_info);
7ab98401 DA	73
6c340eac	74	int drm_agp_info_ioctl(struct inode inode, struct drm_file file_priv,
b5e89ed5	75	unsigned int cmd, unsigned long arg)
7ab98401	76	{
6c340eac	77	struct drm_device *dev = file_priv->head->dev;
c60ce623	78	struct drm_agp_info info;
7ab98401 DA	79	int err;
	80
	81	err = drm_agp_info(dev, &info);
	82	if (err)
	83	return err;
b5e89ed5	84
c60ce623	85	if (copy_to_user((struct drm_agp_info __user *) arg, &info, sizeof(info)))
1da177e4 LT	86	return -EFAULT;
	87	return 0;
	88	}
	89
	90	/**
7ab98401	91	* Acquire the AGP device.
1da177e4	92	*
d985c108	93	* \param dev DRM device that is to acquire AGP.
b5e89ed5	94	* \return zero on success or a negative number on failure.
1da177e4 LT	95	*
1da177e4 LT	96	* Verifies the AGP device hasn't been acquired before and calls
7ab98401	97	* \c agp_backend_acquire.
1da177e4	98	*/
84b1fd10	99	int drm_agp_acquire(struct drm_device * dev)
1da177e4	100	{
1da177e4 LT	101	if (!dev->agp)
	102	return -ENODEV;
	103	if (dev->agp->acquired)
	104	return -EBUSY;
	105	if (!(dev->agp->bridge = agp_backend_acquire(dev->pdev)))
	106	return -ENODEV;
	107	dev->agp->acquired = 1;
	108	return 0;
	109	}
b5e89ed5	110
7ab98401	111	EXPORT_SYMBOL(drm_agp_acquire);
1da177e4 LT	112
1da177e4 LT	113	/**
7ab98401	114	* Acquire the AGP device (ioctl).
1da177e4 LT	115	*
1da177e4 LT	116	* \param inode device inode.
6c340eac	117	* \param file_priv DRM file private.
1da177e4 LT	118	* \param cmd command.
	119	* \param arg user argument.
	120	* \return zero on success or a negative number on failure.
	121	*
7ab98401 DA	122	* Verifies the AGP device hasn't been acquired before and calls
7ab98401 DA	123	* \c agp_backend_acquire.
1da177e4	124	*/
6c340eac	125	int drm_agp_acquire_ioctl(struct inode inode, struct drm_file file_priv,
7ab98401	126	unsigned int cmd, unsigned long arg)
1da177e4	127	{
6c340eac	128	return drm_agp_acquire((struct drm_device *) file_priv->head->dev);
7ab98401	129	}
1da177e4	130
7ab98401 DA	131	/**
	132	* Release the AGP device.
	133	*
d985c108	134	* \param dev DRM device that is to release AGP.
7ab98401 DA	135	* \return zero on success or a negative number on failure.
	136	*
	137	* Verifies the AGP device has been acquired and calls \c agp_backend_release.
	138	*/
84b1fd10	139	int drm_agp_release(struct drm_device * dev)
7ab98401	140	{
1da177e4 LT	141	if (!dev->agp \|\| !dev->agp->acquired)
	142	return -EINVAL;
	143	agp_backend_release(dev->agp->bridge);
	144	dev->agp->acquired = 0;
	145	return 0;
1da177e4	146	}
7ab98401	147	EXPORT_SYMBOL(drm_agp_release);
1da177e4	148
6c340eac	149	int drm_agp_release_ioctl(struct inode inode, struct drm_file file_priv,
7ab98401	150	unsigned int cmd, unsigned long arg)
1da177e4	151	{
6c340eac	152	struct drm_device *dev = file_priv->head->dev;
b5e89ed5	153
7ab98401	154	return drm_agp_release(dev);
1da177e4 LT	155	}
	156
	157	/**
	158	* Enable the AGP bus.
b5e89ed5	159	*
7ab98401 DA	160	* \param dev DRM device that has previously acquired AGP.
7ab98401 DA	161	* \param mode Requested AGP mode.
1da177e4 LT	162	* \return zero on success or a negative number on failure.
	163	*
	164	* Verifies the AGP device has been acquired but not enabled, and calls
7ab98401	165	* \c agp_enable.
1da177e4	166	*/
84b1fd10	167	int drm_agp_enable(struct drm_device * dev, struct drm_agp_mode mode)
1da177e4	168	{
1da177e4 LT	169	if (!dev->agp \|\| !dev->agp->acquired)
	170	return -EINVAL;
	171
b5e89ed5	172	dev->agp->mode = mode.mode;
1da177e4	173	agp_enable(dev->agp->bridge, mode.mode);
b5e89ed5	174	dev->agp->base = dev->agp->agp_info.aper_base;
1da177e4 LT	175	dev->agp->enabled = 1;
	176	return 0;
	177	}
b5e89ed5	178
7ab98401 DA	179	EXPORT_SYMBOL(drm_agp_enable);
7ab98401 DA	180
6c340eac	181	int drm_agp_enable_ioctl(struct inode inode, struct drm_file file_priv,
b5e89ed5	182	unsigned int cmd, unsigned long arg)
7ab98401	183	{
6c340eac	184	struct drm_device *dev = file_priv->head->dev;
c60ce623	185	struct drm_agp_mode mode;
7ab98401	186
c60ce623	187	if (copy_from_user(&mode, (struct drm_agp_mode __user *) arg, sizeof(mode)))
7ab98401 DA	188	return -EFAULT;
	189
	190	return drm_agp_enable(dev, mode);
	191	}
1da177e4 LT	192
	193	/**
	194	* Allocate AGP memory.
	195	*
	196	* \param inode device inode.
6c340eac	197	* \param file_priv file private pointer.
1da177e4 LT	198	* \param cmd command.
	199	* \param arg pointer to a drm_agp_buffer structure.
	200	* \return zero on success or a negative number on failure.
b5e89ed5	201	*
1da177e4 LT	202	* Verifies the AGP device is present and has been acquired, allocates the
	203	* memory via alloc_agp() and creates a drm_agp_mem entry for it.
	204	*/
84b1fd10	205	int drm_agp_alloc(struct drm_device dev, struct drm_agp_buffer request)
1da177e4	206	{
55910517	207	struct drm_agp_mem *entry;
b5e89ed5 DA	208	DRM_AGP_MEM *memory;
	209	unsigned long pages;
	210	u32 type;
1da177e4 LT	211
	212	if (!dev->agp \|\| !dev->agp->acquired)
	213	return -EINVAL;
1da177e4 LT	214	if (!(entry = drm_alloc(sizeof(*entry), DRM_MEM_AGPLISTS)))
	215	return -ENOMEM;
	216
b5e89ed5	217	memset(entry, 0, sizeof(*entry));
1da177e4	218
efa58395 DA	219	pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
efa58395 DA	220	type = (u32) request->type;
b5d499cf	221	if (!(memory = drm_alloc_agp(dev, pages, type))) {
1da177e4 LT	222	drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
	223	return -ENOMEM;
	224	}
	225
b5e89ed5 DA	226	entry->handle = (unsigned long)memory->key + 1;
	227	entry->memory = memory;
	228	entry->bound = 0;
	229	entry->pages = pages;
bd1b331f	230	list_add(&entry->head, &dev->agp->memory);
1da177e4	231
efa58395 DA	232	request->handle = entry->handle;
	233	request->physical = memory->physical;
	234
	235	return 0;
	236	}
	237	EXPORT_SYMBOL(drm_agp_alloc);
	238
6c340eac	239	int drm_agp_alloc_ioctl(struct inode inode, struct drm_file file_priv,
efa58395 DA	240	unsigned int cmd, unsigned long arg)
efa58395 DA	241	{
6c340eac	242	struct drm_device *dev = file_priv->head->dev;
c60ce623 DA	243	struct drm_agp_buffer request;
c60ce623 DA	244	struct drm_agp_buffer __user argp = (void __user )arg;
efa58395 DA	245	int err;
	246
	247	if (copy_from_user(&request, argp, sizeof(request)))
	248	return -EFAULT;
	249
	250	err = drm_agp_alloc(dev, &request);
	251	if (err)
	252	return err;
1da177e4 LT	253
1da177e4 LT	254	if (copy_to_user(argp, &request, sizeof(request))) {
55910517	255	struct drm_agp_mem *entry;
bd1b331f DA	256	list_for_each_entry(entry, &dev->agp->memory, head) {
	257	if (entry->handle == request.handle)
	258	break;
	259	}
	260	list_del(&entry->head);
efa58395	261	drm_free_agp(entry->memory, entry->pages);
1da177e4 LT	262	drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
	263	return -EFAULT;
	264	}
efa58395	265
1da177e4 LT	266	return 0;
	267	}
	268
	269	/**
	270	* Search for the AGP memory entry associated with a handle.
	271	*
	272	* \param dev DRM device structure.
	273	* \param handle AGP memory handle.
	274	* \return pointer to the drm_agp_mem structure associated with \p handle.
b5e89ed5	275	*
1da177e4 LT	276	* Walks through drm_agp_head::memory until finding a matching handle.
1da177e4 LT	277	*/
55910517	278	static struct drm_agp_mem drm_agp_lookup_entry(struct drm_device dev,
b5e89ed5	279	unsigned long handle)
1da177e4	280	{
55910517	281	struct drm_agp_mem *entry;
1da177e4	282
bd1b331f	283	list_for_each_entry(entry, &dev->agp->memory, head) {
1da177e4 LT	284	if (entry->handle == handle)
	285	return entry;
	286	}
	287	return NULL;
	288	}
	289
	290	/**
	291	* Unbind AGP memory from the GATT (ioctl).
	292	*
	293	* \param inode device inode.
6c340eac	294	* \param file_priv DRM file private.
1da177e4 LT	295	* \param cmd command.
	296	* \param arg pointer to a drm_agp_binding structure.
	297	* \return zero on success or a negative number on failure.
	298	*
	299	* Verifies the AGP device is present and acquired, looks-up the AGP memory
	300	* entry and passes it to the unbind_agp() function.
	301	*/
84b1fd10	302	int drm_agp_unbind(struct drm_device dev, struct drm_agp_binding request)
1da177e4	303	{
55910517	304	struct drm_agp_mem *entry;
1da177e4 LT	305	int ret;
	306
	307	if (!dev->agp \|\| !dev->agp->acquired)
	308	return -EINVAL;
efa58395	309	if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
1da177e4 LT	310	return -EINVAL;
	311	if (!entry->bound)
	312	return -EINVAL;
	313	ret = drm_unbind_agp(entry->memory);
	314	if (ret == 0)
b5e89ed5	315	entry->bound = 0;
1da177e4 LT	316	return ret;
1da177e4 LT	317	}
efa58395 DA	318	EXPORT_SYMBOL(drm_agp_unbind);
efa58395 DA	319
6c340eac	320	int drm_agp_unbind_ioctl(struct inode inode, struct drm_file file_priv,
efa58395 DA	321	unsigned int cmd, unsigned long arg)
efa58395 DA	322	{
6c340eac	323	struct drm_device *dev = file_priv->head->dev;
c60ce623	324	struct drm_agp_binding request;
efa58395 DA	325
efa58395 DA	326	if (copy_from_user
c60ce623	327	(&request, (struct drm_agp_binding __user *) arg, sizeof(request)))
efa58395 DA	328	return -EFAULT;
	329
	330	return drm_agp_unbind(dev, &request);
	331	}
1da177e4 LT	332
	333	/**
	334	* Bind AGP memory into the GATT (ioctl)
	335	*
	336	* \param inode device inode.
6c340eac	337	* \param file_priv DRM file private.
1da177e4 LT	338	* \param cmd command.
	339	* \param arg pointer to a drm_agp_binding structure.
	340	* \return zero on success or a negative number on failure.
	341	*
	342	* Verifies the AGP device is present and has been acquired and that no memory
	343	* is currently bound into the GATT. Looks-up the AGP memory entry and passes
	344	* it to bind_agp() function.
	345	*/
84b1fd10	346	int drm_agp_bind(struct drm_device dev, struct drm_agp_binding request)
1da177e4	347	{
55910517	348	struct drm_agp_mem *entry;
b5e89ed5 DA	349	int retcode;
b5e89ed5 DA	350	int page;
1da177e4 LT	351
	352	if (!dev->agp \|\| !dev->agp->acquired)
	353	return -EINVAL;
efa58395	354	if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
1da177e4 LT	355	return -EINVAL;
	356	if (entry->bound)
	357	return -EINVAL;
efa58395	358	page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
1da177e4 LT	359	if ((retcode = drm_bind_agp(entry->memory, page)))
	360	return retcode;
	361	entry->bound = dev->agp->base + (page << PAGE_SHIFT);
	362	DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n",
	363	dev->agp->base, entry->bound);
	364	return 0;
	365	}
efa58395 DA	366	EXPORT_SYMBOL(drm_agp_bind);
efa58395 DA	367
6c340eac	368	int drm_agp_bind_ioctl(struct inode inode, struct drm_file file_priv,
efa58395 DA	369	unsigned int cmd, unsigned long arg)
efa58395 DA	370	{
6c340eac	371	struct drm_device *dev = file_priv->head->dev;
c60ce623	372	struct drm_agp_binding request;
efa58395 DA	373
efa58395 DA	374	if (copy_from_user
c60ce623	375	(&request, (struct drm_agp_binding __user *) arg, sizeof(request)))
efa58395 DA	376	return -EFAULT;
	377
	378	return drm_agp_bind(dev, &request);
	379	}
1da177e4 LT	380
	381	/**
	382	* Free AGP memory (ioctl).
	383	*
	384	* \param inode device inode.
6c340eac	385	* \param file_priv DRM file private.
1da177e4 LT	386	* \param cmd command.
	387	* \param arg pointer to a drm_agp_buffer structure.
	388	* \return zero on success or a negative number on failure.
	389	*
	390	* Verifies the AGP device is present and has been acquired and looks up the
	391	* AGP memory entry. If the memory it's currently bound, unbind it via
	392	* unbind_agp(). Frees it via free_agp() as well as the entry itself
	393	* and unlinks from the doubly linked list it's inserted in.
	394	*/
84b1fd10	395	int drm_agp_free(struct drm_device dev, struct drm_agp_buffer request)
1da177e4	396	{
55910517	397	struct drm_agp_mem *entry;
1da177e4 LT	398
	399	if (!dev->agp \|\| !dev->agp->acquired)
	400	return -EINVAL;
efa58395	401	if (!(entry = drm_agp_lookup_entry(dev, request->handle)))
1da177e4 LT	402	return -EINVAL;
	403	if (entry->bound)
	404	drm_unbind_agp(entry->memory);
	405
bd1b331f	406	list_del(&entry->head);
1da177e4 LT	407
	408	drm_free_agp(entry->memory, entry->pages);
	409	drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
	410	return 0;
	411	}
efa58395 DA	412	EXPORT_SYMBOL(drm_agp_free);
efa58395 DA	413
6c340eac	414	int drm_agp_free_ioctl(struct inode inode, struct drm_file file_priv,
efa58395 DA	415	unsigned int cmd, unsigned long arg)
efa58395 DA	416	{
6c340eac	417	struct drm_device *dev = file_priv->head->dev;
c60ce623	418	struct drm_agp_buffer request;
efa58395 DA	419
efa58395 DA	420	if (copy_from_user
c60ce623	421	(&request, (struct drm_agp_buffer __user *) arg, sizeof(request)))
efa58395 DA	422	return -EFAULT;
	423
	424	return drm_agp_free(dev, &request);
	425	}
1da177e4 LT	426
	427	/**
	428	* Initialize the AGP resources.
	429	*
	430	* \return pointer to a drm_agp_head structure.
	431	*
d985c108 DA	432	* Gets the drm_agp_t structure which is made available by the agpgart module
	433	* via the inter_module_* functions. Creates and initializes a drm_agp_head
	434	* structure.
1da177e4	435	*/
55910517	436	struct drm_agp_head drm_agp_init(struct drm_device dev)
1da177e4	437	{
55910517	438	struct drm_agp_head *head = NULL;
1da177e4 LT	439
	440	if (!(head = drm_alloc(sizeof(*head), DRM_MEM_AGPLISTS)))
	441	return NULL;
	442	memset((void )head, 0, sizeof(head));
	443	head->bridge = agp_find_bridge(dev->pdev);
	444	if (!head->bridge) {
	445	if (!(head->bridge = agp_backend_acquire(dev->pdev))) {
	446	drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS);
	447	return NULL;
	448	}
	449	agp_copy_info(head->bridge, &head->agp_info);
	450	agp_backend_release(head->bridge);
	451	} else {
	452	agp_copy_info(head->bridge, &head->agp_info);
	453	}
	454	if (head->agp_info.chipset == NOT_SUPPORTED) {
	455	drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS);
	456	return NULL;
	457	}
bd1b331f	458	INIT_LIST_HEAD(&head->memory);
1da177e4 LT	459	head->cant_use_aperture = head->agp_info.cant_use_aperture;
1da177e4 LT	460	head->page_mask = head->agp_info.page_mask;
1da177e4 LT	461
	462	return head;
	463	}
	464
	465	/** Calls agp_allocate_memory() */
b5e89ed5 DA	466	DRM_AGP_MEM drm_agp_allocate_memory(struct agp_bridge_data bridge,
b5e89ed5 DA	467	size_t pages, u32 type)
1da177e4 LT	468	{
	469	return agp_allocate_memory(bridge, pages, type);
	470	}
	471
	472	/** Calls agp_free_memory() */
b5e89ed5	473	int drm_agp_free_memory(DRM_AGP_MEM * handle)
1da177e4 LT	474	{
	475	if (!handle)
	476	return 0;
	477	agp_free_memory(handle);
	478	return 1;
	479	}
	480
	481	/** Calls agp_bind_memory() */
b5e89ed5	482	int drm_agp_bind_memory(DRM_AGP_MEM * handle, off_t start)
1da177e4 LT	483	{
	484	if (!handle)
	485	return -EINVAL;
	486	return agp_bind_memory(handle, start);
	487	}
b5e89ed5	488
1da177e4	489	/** Calls agp_unbind_memory() */
b5e89ed5	490	int drm_agp_unbind_memory(DRM_AGP_MEM * handle)
1da177e4 LT	491	{
	492	if (!handle)
	493	return -EINVAL;
	494	return agp_unbind_memory(handle);
	495	}
	496
b5e89ed5	497	#endif /* __OS_HAS_AGP */