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Commit 0316fe83 authored by Zwane Mwaikambo's avatar Zwane Mwaikambo Committed by Dave Jones
Browse files

[AGPGART] compat ioctl 

The following video card requires the agpgart driver ioctl
interface in order to detect video memory.

00:02.0 VGA compatible controller: Intel Corporation Mobile
945GM/GMS/940GML Express Integrated Graphics Controller (rev 03)

Tested on a Thinkpad Z61t, Xorg.0.log from a 32bit debian Xorg is at;

http://montezuma.homeunix.net/Xorg.0.log



Signed-off-by: default avatarZwane Mwaikambo <zwane@infradead.org>
Signed-off-by: default avatarDave Jones <davej@redhat.com>
parent ce35a81a

drivers/char/agp/Makefile

+1 −0
Original line number Diff line number Diff line 
agpgart-y := backend.o frontend.o generic.o isoch.o



obj-$(CONFIG_AGP)		+= agpgart.o

obj-$(CONFIG_COMPAT)		+= compat_ioctl.o

obj-$(CONFIG_AGP_ALI)		+= ali-agp.o

obj-$(CONFIG_AGP_ATI)		+= ati-agp.o

obj-$(CONFIG_AGP_AMD)		+= amd-k7-agp.o

drivers/char/agp/agp.h

+2 −0
Original line number Diff line number Diff line
@@ -288,6 +288,8 @@ extern struct aper_size_info_16 agp3_generic_sizes[]; 
extern int agp_off;

extern int agp_try_unsupported_boot;



long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg);



/* Chipset independant registers (from AGP Spec) */

#define AGP_APBASE	0x10

drivers/char/agp/compat_ioctl.c

0 → 100644
+282 −0
Original line number Diff line number Diff line 
/*

 * AGPGART driver frontend compatibility ioctls

 * Copyright (C) 2004 Silicon Graphics, Inc.

 * Copyright (C) 2002-2003 Dave Jones

 * Copyright (C) 1999 Jeff Hartmann

 * Copyright (C) 1999 Precision Insight, Inc.

 * Copyright (C) 1999 Xi Graphics, Inc.

 *

 * 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 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

 * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS 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 <linux/kernel.h>

#include <linux/pci.h>

#include <linux/agpgart.h>

#include <asm/uaccess.h>

#include "agp.h"

#include "compat_ioctl.h"



static int compat_agpioc_info_wrap(struct agp_file_private *priv, void __user *arg)

{

	struct agp_info32 userinfo;

	struct agp_kern_info kerninfo;



	agp_copy_info(agp_bridge, &kerninfo);



	userinfo.version.major = kerninfo.version.major;

	userinfo.version.minor = kerninfo.version.minor;

	userinfo.bridge_id = kerninfo.device->vendor |

	    (kerninfo.device->device << 16);

	userinfo.agp_mode = kerninfo.mode;

	userinfo.aper_base = (compat_long_t)kerninfo.aper_base;

	userinfo.aper_size = kerninfo.aper_size;

	userinfo.pg_total = userinfo.pg_system = kerninfo.max_memory;

	userinfo.pg_used = kerninfo.current_memory;



	if (copy_to_user(arg, &userinfo, sizeof(userinfo)))

		return -EFAULT;



	return 0;

}



static int compat_agpioc_reserve_wrap(struct agp_file_private *priv, void __user *arg)

{

	struct agp_region32 ureserve;

	struct agp_region kreserve;

	struct agp_client *client;

	struct agp_file_private *client_priv;



	DBG("");

	if (copy_from_user(&ureserve, arg, sizeof(ureserve)))

		return -EFAULT;



	if ((unsigned) ureserve.seg_count >= ~0U/sizeof(struct agp_segment32))

		return -EFAULT;



	kreserve.pid = ureserve.pid;

	kreserve.seg_count = ureserve.seg_count;



	client = agp_find_client_by_pid(kreserve.pid);



	if (kreserve.seg_count == 0) {

		/* remove a client */

		client_priv = agp_find_private(kreserve.pid);



		if (client_priv != NULL) {

			set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags);

			set_bit(AGP_FF_IS_VALID, &client_priv->access_flags);

		}

		if (client == NULL) {

			/* client is already removed */

			return 0;

		}

		return agp_remove_client(kreserve.pid);

	} else {

		struct agp_segment32 *usegment;

		struct agp_segment *ksegment;

		int seg;



		if (ureserve.seg_count >= 16384)

			return -EINVAL;



		usegment = kmalloc(sizeof(*usegment) * ureserve.seg_count, GFP_KERNEL);

		if (!usegment)

			return -ENOMEM;



		ksegment = kmalloc(sizeof(*ksegment) * kreserve.seg_count, GFP_KERNEL);

		if (!ksegment) {

			kfree(usegment);

			return -ENOMEM;

		}



		if (copy_from_user(usegment, (void __user *) ureserve.seg_list,

				   sizeof(*usegment) * ureserve.seg_count)) {

			kfree(usegment);

			kfree(ksegment);

			return -EFAULT;

		}



		for (seg = 0; seg < ureserve.seg_count; seg++) {

			ksegment[seg].pg_start = usegment[seg].pg_start;

			ksegment[seg].pg_count = usegment[seg].pg_count;

			ksegment[seg].prot = usegment[seg].prot;

		}



		kfree(usegment);

		kreserve.seg_list = ksegment;



		if (client == NULL) {

			/* Create the client and add the segment */

			client = agp_create_client(kreserve.pid);



			if (client == NULL) {

				kfree(ksegment);

				return -ENOMEM;

			}

			client_priv = agp_find_private(kreserve.pid);



			if (client_priv != NULL) {

				set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags);

				set_bit(AGP_FF_IS_VALID, &client_priv->access_flags);

			}

		}

		return agp_create_segment(client, &kreserve);

	}

	/* Will never really happen */

	return -EINVAL;

}



static int compat_agpioc_allocate_wrap(struct agp_file_private *priv, void __user *arg)

{

	struct agp_memory *memory;

	struct agp_allocate32 alloc;



	DBG("");

	if (copy_from_user(&alloc, arg, sizeof(alloc)))

		return -EFAULT;



	memory = agp_allocate_memory_wrap(alloc.pg_count, alloc.type);



	if (memory == NULL)

		return -ENOMEM;



	alloc.key = memory->key;

	alloc.physical = memory->physical;



	if (copy_to_user(arg, &alloc, sizeof(alloc))) {

		agp_free_memory_wrap(memory);

		return -EFAULT;

	}

	return 0;

}



static int compat_agpioc_bind_wrap(struct agp_file_private *priv, void __user *arg)

{

	struct agp_bind32 bind_info;

	struct agp_memory *memory;



	DBG("");

	if (copy_from_user(&bind_info, arg, sizeof(bind_info)))

		return -EFAULT;



	memory = agp_find_mem_by_key(bind_info.key);



	if (memory == NULL)

		return -EINVAL;



	return agp_bind_memory(memory, bind_info.pg_start);

}



static int compat_agpioc_unbind_wrap(struct agp_file_private *priv, void __user *arg)

{

	struct agp_memory *memory;

	struct agp_unbind32 unbind;



	DBG("");

	if (copy_from_user(&unbind, arg, sizeof(unbind)))

		return -EFAULT;



	memory = agp_find_mem_by_key(unbind.key);



	if (memory == NULL)

		return -EINVAL;



	return agp_unbind_memory(memory);

}



long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)

{

	struct agp_file_private *curr_priv = file->private_data;

	int ret_val = -ENOTTY;



	mutex_lock(&(agp_fe.agp_mutex));



	if ((agp_fe.current_controller == NULL) &&

	    (cmd != AGPIOC_ACQUIRE32)) {

		ret_val = -EINVAL;

		goto ioctl_out;

	}

	if ((agp_fe.backend_acquired != TRUE) &&

	    (cmd != AGPIOC_ACQUIRE32)) {

		ret_val = -EBUSY;

		goto ioctl_out;

	}

	if (cmd != AGPIOC_ACQUIRE32) {

		if (!(test_bit(AGP_FF_IS_CONTROLLER, &curr_priv->access_flags))) {

			ret_val = -EPERM;

			goto ioctl_out;

		}

		/* Use the original pid of the controller,

		 * in case it's threaded */



		if (agp_fe.current_controller->pid != curr_priv->my_pid) {

			ret_val = -EBUSY;

			goto ioctl_out;

		}

	}



	switch (cmd) {

	case AGPIOC_INFO32:

		ret_val = compat_agpioc_info_wrap(curr_priv, (void __user *) arg);

		break;



	case AGPIOC_ACQUIRE32:

		ret_val = agpioc_acquire_wrap(curr_priv);

		break;



	case AGPIOC_RELEASE32:

		ret_val = agpioc_release_wrap(curr_priv);

		break;



	case AGPIOC_SETUP32:

		ret_val = agpioc_setup_wrap(curr_priv, (void __user *) arg);

		break;



	case AGPIOC_RESERVE32:

		ret_val = compat_agpioc_reserve_wrap(curr_priv, (void __user *) arg);

		break;



	case AGPIOC_PROTECT32:

		ret_val = agpioc_protect_wrap(curr_priv);

		break;



	case AGPIOC_ALLOCATE32:

		ret_val = compat_agpioc_allocate_wrap(curr_priv, (void __user *) arg);

		break;



	case AGPIOC_DEALLOCATE32:

		ret_val = agpioc_deallocate_wrap(curr_priv, (int) arg);

		break;



	case AGPIOC_BIND32:

		ret_val = compat_agpioc_bind_wrap(curr_priv, (void __user *) arg);

		break;



	case AGPIOC_UNBIND32:

		ret_val = compat_agpioc_unbind_wrap(curr_priv, (void __user *) arg);

		break;

	}



ioctl_out:

	DBG("ioctl returns %d\n", ret_val);

	mutex_unlock(&(agp_fe.agp_mutex));

	return ret_val;

}

drivers/char/agp/compat_ioctl.h

0 → 100644
+105 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 1999 Jeff Hartmann

 * Copyright (C) 1999 Precision Insight, Inc.

 * Copyright (C) 1999 Xi Graphics, Inc.

 *

 * 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 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

 * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS 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.

 *

 */



#ifndef _AGP_COMPAT_IOCTL_H

#define _AGP_COMPAT_IOCTL_H



#include <linux/compat.h>

#include <linux/agpgart.h>



#define AGPIOC_INFO32       _IOR (AGPIOC_BASE, 0, compat_uptr_t)

#define AGPIOC_ACQUIRE32    _IO  (AGPIOC_BASE, 1)

#define AGPIOC_RELEASE32    _IO  (AGPIOC_BASE, 2)

#define AGPIOC_SETUP32      _IOW (AGPIOC_BASE, 3, compat_uptr_t)

#define AGPIOC_RESERVE32    _IOW (AGPIOC_BASE, 4, compat_uptr_t)

#define AGPIOC_PROTECT32    _IOW (AGPIOC_BASE, 5, compat_uptr_t)

#define AGPIOC_ALLOCATE32   _IOWR(AGPIOC_BASE, 6, compat_uptr_t)

#define AGPIOC_DEALLOCATE32 _IOW (AGPIOC_BASE, 7, compat_int_t)

#define AGPIOC_BIND32       _IOW (AGPIOC_BASE, 8, compat_uptr_t)

#define AGPIOC_UNBIND32     _IOW (AGPIOC_BASE, 9, compat_uptr_t)



struct agp_info32 {

	struct agp_version version;	/* version of the driver        */

	u32 bridge_id;		/* bridge vendor/device         */

	u32 agp_mode;		/* mode info of bridge          */

	compat_long_t aper_base;	/* base of aperture             */

	compat_size_t aper_size;	/* size of aperture             */

	compat_size_t pg_total;	/* max pages (swap + system)    */

	compat_size_t pg_system;	/* max pages (system)           */

	compat_size_t pg_used;		/* current pages used           */

};



/*

 * The "prot" down below needs still a "sleep" flag somehow ...

 */

struct agp_segment32 {

	compat_off_t pg_start;		/* starting page to populate    */

	compat_size_t pg_count;	/* number of pages              */

	compat_int_t prot;		/* prot flags for mmap          */

};



struct agp_region32 {

	compat_pid_t pid;		/* pid of process               */

	compat_size_t seg_count;	/* number of segments           */

	struct agp_segment32 *seg_list;

};



struct agp_allocate32 {

	compat_int_t key;		/* tag of allocation            */

	compat_size_t pg_count;	/* number of pages              */

	u32 type;		/* 0 == normal, other devspec   */

	u32 physical;           /* device specific (some devices

				 * need a phys address of the

				 * actual page behind the gatt

				 * table)                        */

};



struct agp_bind32 {

	compat_int_t key;		/* tag of allocation            */

	compat_off_t pg_start;		/* starting page to populate    */

};



struct agp_unbind32 {

	compat_int_t key;		/* tag of allocation            */

	u32 priority;		/* priority for paging out      */

};



extern struct agp_front_data agp_fe;



int agpioc_acquire_wrap(struct agp_file_private *priv);

int agpioc_release_wrap(struct agp_file_private *priv);

int agpioc_protect_wrap(struct agp_file_private *priv);

int agpioc_setup_wrap(struct agp_file_private *priv, void __user *arg);

int agpioc_deallocate_wrap(struct agp_file_private *priv, int arg);

struct agp_file_private *agp_find_private(pid_t pid);

struct agp_client *agp_create_client(pid_t id);

int agp_remove_client(pid_t id);

int agp_create_segment(struct agp_client *client, struct agp_region *region);

void agp_free_memory_wrap(struct agp_memory *memory);

struct agp_memory *agp_allocate_memory_wrap(size_t pg_count, u32 type);

struct agp_memory *agp_find_mem_by_key(int key);

struct agp_client *agp_find_client_by_pid(pid_t id);



#endif /* _AGP_COMPAT_H */

drivers/char/agp/frontend.c

+17 −14
Original line number Diff line number Diff line
@@ -41,9 +41,9 @@ 
#include <asm/pgtable.h>

#include "agp.h"



static struct agp_front_data agp_fe;

struct agp_front_data agp_fe;



static struct agp_memory *agp_find_mem_by_key(int key)

struct agp_memory *agp_find_mem_by_key(int key)

{

	struct agp_memory *curr;
@@ -159,7 +159,7 @@ static pgprot_t agp_convert_mmap_flags(int prot) 
	return vm_get_page_prot(prot_bits);

}



static int agp_create_segment(struct agp_client *client, struct agp_region *region)

int agp_create_segment(struct agp_client *client, struct agp_region *region)

{

	struct agp_segment_priv **ret_seg;

	struct agp_segment_priv *seg;
@@ -211,7 +211,7 @@ static void agp_insert_into_pool(struct agp_memory * temp) 


/* File private list routines */



static struct agp_file_private *agp_find_private(pid_t pid)

struct agp_file_private *agp_find_private(pid_t pid)

{

	struct agp_file_private *curr;
@@ -266,13 +266,13 @@ static void agp_remove_file_private(struct agp_file_private * priv) 
 * Wrappers for agp_free_memory & agp_allocate_memory

 * These make sure that internal lists are kept updated.

 */

static void agp_free_memory_wrap(struct agp_memory *memory)

void agp_free_memory_wrap(struct agp_memory *memory)

{

	agp_remove_from_pool(memory);

	agp_free_memory(memory);

}



static struct agp_memory *agp_allocate_memory_wrap(size_t pg_count, u32 type)

struct agp_memory *agp_allocate_memory_wrap(size_t pg_count, u32 type)

{

	struct agp_memory *memory;
@@ -484,7 +484,7 @@ static struct agp_controller *agp_find_controller_for_client(pid_t id) 
	return NULL;

}



static struct agp_client *agp_find_client_by_pid(pid_t id)

struct agp_client *agp_find_client_by_pid(pid_t id)

{

	struct agp_client *temp;
@@ -509,7 +509,7 @@ static void agp_insert_client(struct agp_client *client) 
	agp_fe.current_controller->num_clients++;

}



static struct agp_client *agp_create_client(pid_t id)

struct agp_client *agp_create_client(pid_t id)

{

	struct agp_client *new_client;
@@ -522,7 +522,7 @@ static struct agp_client *agp_create_client(pid_t id) 
	return new_client;

}



static int agp_remove_client(pid_t id)

int agp_remove_client(pid_t id)

{

	struct agp_client *client;

	struct agp_client *prev_client;
@@ -746,7 +746,7 @@ static int agpioc_info_wrap(struct agp_file_private *priv, void __user *arg) 
	return 0;

}



static int agpioc_acquire_wrap(struct agp_file_private *priv)

int agpioc_acquire_wrap(struct agp_file_private *priv)

{

	struct agp_controller *controller;
@@ -789,14 +789,14 @@ static int agpioc_acquire_wrap(struct agp_file_private *priv) 
	return 0;

}



static int agpioc_release_wrap(struct agp_file_private *priv)

int agpioc_release_wrap(struct agp_file_private *priv)

{

	DBG("");

	agp_controller_release_current(agp_fe.current_controller, priv);

	return 0;

}



static int agpioc_setup_wrap(struct agp_file_private *priv, void __user *arg)

int agpioc_setup_wrap(struct agp_file_private *priv, void __user *arg)

{

	struct agp_setup mode;
@@ -876,7 +876,7 @@ static int agpioc_reserve_wrap(struct agp_file_private *priv, void __user *arg) 
	return -EINVAL;

}



static int agpioc_protect_wrap(struct agp_file_private *priv)

int agpioc_protect_wrap(struct agp_file_private *priv)

{

	DBG("");

	/* This function is not currently implemented */
@@ -907,7 +907,7 @@ static int agpioc_allocate_wrap(struct agp_file_private *priv, void __user *arg) 
	return 0;

}



static int agpioc_deallocate_wrap(struct agp_file_private *priv, int arg)

int agpioc_deallocate_wrap(struct agp_file_private *priv, int arg)

{

	struct agp_memory *memory;
@@ -1043,6 +1043,9 @@ static const struct file_operations agp_fops = 
	.read		= agp_read,

	.write		= agp_write,

	.ioctl		= agp_ioctl,

#ifdef CONFIG_COMPAT

	.compat_ioctl	= compat_agp_ioctl,

#endif

	.mmap		= agp_mmap,

	.open		= agp_open,

	.release	= agp_release,