On Wed, Nov 22, 2023 at 7:25 AM Thomas Zimmermann <tzimmermann@xxxxxxx> wrote:
>
> The AGP subsystem supports a user-space interface via /dev/agpgart. It
> is only enabled with DRM support for mode setting in user space. (i.e.,
> CONFIG_DRM_LEGACY). All of that DRM code has been removed and the option
> will go away. Hence remove the AGP frontend.
>
> Modern DRM drivers with kernel mode setting handle AGP support internally.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/char/agp/Makefile | 6 -
> drivers/char/agp/agp.h | 9 -
> drivers/char/agp/backend.c | 11 -
> drivers/char/agp/compat_ioctl.c | 291 ---------
> drivers/char/agp/compat_ioctl.h | 106 ---
> drivers/char/agp/frontend.c | 1068 -------------------------------
> 6 files changed, 1491 deletions(-)
> delete mode 100644 drivers/char/agp/compat_ioctl.c
> delete mode 100644 drivers/char/agp/compat_ioctl.h
> delete mode 100644 drivers/char/agp/frontend.c
>
> diff --git a/drivers/char/agp/Makefile b/drivers/char/agp/Makefile
> index 25834557e4865..43b09cf193bb7 100644
> --- a/drivers/char/agp/Makefile
> +++ b/drivers/char/agp/Makefile
> @@ -1,12 +1,6 @@
> # SPDX-License-Identifier: GPL-2.0
> agpgart-y := backend.o generic.o isoch.o
>
> -ifeq ($(CONFIG_DRM_LEGACY),y)
> -agpgart-$(CONFIG_COMPAT) += compat_ioctl.o
> -agpgart-y += frontend.o
> -endif
> -
> -
> obj-$(CONFIG_AGP) += agpgart.o
> obj-$(CONFIG_AGP_ALI) += ali-agp.o
> obj-$(CONFIG_AGP_ATI) += ati-agp.o
> diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h
> index 8771dcc9b8e2f..5c36ab85f80b7 100644
> --- a/drivers/char/agp/agp.h
> +++ b/drivers/char/agp/agp.h
> @@ -185,15 +185,6 @@ void agp_put_bridge(struct agp_bridge_data *bridge);
> int agp_add_bridge(struct agp_bridge_data *bridge);
> void agp_remove_bridge(struct agp_bridge_data *bridge);
>
> -/* Frontend routines. */
> -#if IS_ENABLED(CONFIG_DRM_LEGACY)
> -int agp_frontend_initialize(void);
> -void agp_frontend_cleanup(void);
> -#else
> -static inline int agp_frontend_initialize(void) { return 0; }
> -static inline void agp_frontend_cleanup(void) {}
> -#endif
> -
> /* Generic routines. */
> void agp_generic_enable(struct agp_bridge_data *bridge, u32 mode);
> int agp_generic_create_gatt_table(struct agp_bridge_data *bridge);
> diff --git a/drivers/char/agp/backend.c b/drivers/char/agp/backend.c
> index 0e19c600db531..1776afd3ee078 100644
> --- a/drivers/char/agp/backend.c
> +++ b/drivers/char/agp/backend.c
> @@ -293,13 +293,6 @@ int agp_add_bridge(struct agp_bridge_data *bridge)
> }
>
> if (list_empty(&agp_bridges)) {
> - error = agp_frontend_initialize();
> - if (error) {
> - dev_info(&bridge->dev->dev,
> - "agp_frontend_initialize() failed\n");
> - goto frontend_err;
> - }
> -
> dev_info(&bridge->dev->dev, "AGP aperture is %dM @ 0x%lx\n",
> bridge->driver->fetch_size(), bridge->gart_bus_addr);
>
> @@ -308,8 +301,6 @@ int agp_add_bridge(struct agp_bridge_data *bridge)
> list_add(&bridge->list, &agp_bridges);
> return 0;
>
> -frontend_err:
> - agp_backend_cleanup(bridge);
> err_out:
> module_put(bridge->driver->owner);
> err_put_bridge:
> @@ -323,8 +314,6 @@ void agp_remove_bridge(struct agp_bridge_data *bridge)
> {
> agp_backend_cleanup(bridge);
> list_del(&bridge->list);
> - if (list_empty(&agp_bridges))
> - agp_frontend_cleanup();
> module_put(bridge->driver->owner);
> }
> EXPORT_SYMBOL_GPL(agp_remove_bridge);
> diff --git a/drivers/char/agp/compat_ioctl.c b/drivers/char/agp/compat_ioctl.c
> deleted file mode 100644
> index 52ffe1706ce05..0000000000000
> --- a/drivers/char/agp/compat_ioctl.c
> +++ /dev/null
> @@ -1,291 +0,0 @@
> -/*
> - * 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/fs.h>
> -#include <linux/agpgart.h>
> -#include <linux/slab.h>
> -#include <linux/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_array(ureserve.seg_count,
> - sizeof(*usegment),
> - GFP_KERNEL);
> - if (!usegment)
> - return -ENOMEM;
> -
> - ksegment = kmalloc_array(kreserve.seg_count,
> - sizeof(*ksegment),
> - 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;
> -
> - case AGPIOC_CHIPSET_FLUSH32:
> - break;
> - }
> -
> -ioctl_out:
> - DBG("ioctl returns %d\n", ret_val);
> - mutex_unlock(&(agp_fe.agp_mutex));
> - return ret_val;
> -}
> -
> diff --git a/drivers/char/agp/compat_ioctl.h b/drivers/char/agp/compat_ioctl.h
> deleted file mode 100644
> index f30e0fd979635..0000000000000
> --- a/drivers/char/agp/compat_ioctl.h
> +++ /dev/null
> @@ -1,106 +0,0 @@
> -/*
> - * 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)
> -#define AGPIOC_CHIPSET_FLUSH32 _IO (AGPIOC_BASE, 10)
> -
> -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 */
> diff --git a/drivers/char/agp/frontend.c b/drivers/char/agp/frontend.c
> deleted file mode 100644
> index 321118a9cfa52..0000000000000
> --- a/drivers/char/agp/frontend.c
> +++ /dev/null
> @@ -1,1068 +0,0 @@
> -/*
> - * AGPGART driver frontend
> - * 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/types.h>
> -#include <linux/kernel.h>
> -#include <linux/module.h>
> -#include <linux/mman.h>
> -#include <linux/pci.h>
> -#include <linux/miscdevice.h>
> -#include <linux/agp_backend.h>
> -#include <linux/agpgart.h>
> -#include <linux/slab.h>
> -#include <linux/mm.h>
> -#include <linux/fs.h>
> -#include <linux/sched.h>
> -#include <linux/uaccess.h>
> -
> -#include "agp.h"
> -#include "compat_ioctl.h"
> -
> -struct agp_front_data agp_fe;
> -
> -struct agp_memory *agp_find_mem_by_key(int key)
> -{
> - struct agp_memory *curr;
> -
> - if (agp_fe.current_controller == NULL)
> - return NULL;
> -
> - curr = agp_fe.current_controller->pool;
> -
> - while (curr != NULL) {
> - if (curr->key == key)
> - break;
> - curr = curr->next;
> - }
> -
> - DBG("key=%d -> mem=%p", key, curr);
> - return curr;
> -}
> -
> -static void agp_remove_from_pool(struct agp_memory *temp)
> -{
> - struct agp_memory *prev;
> - struct agp_memory *next;
> -
> - /* Check to see if this is even in the memory pool */
> -
> - DBG("mem=%p", temp);
> - if (agp_find_mem_by_key(temp->key) != NULL) {
> - next = temp->next;
> - prev = temp->prev;
> -
> - if (prev != NULL) {
> - prev->next = next;
> - if (next != NULL)
> - next->prev = prev;
> -
> - } else {
> - /* This is the first item on the list */
> - if (next != NULL)
> - next->prev = NULL;
> -
> - agp_fe.current_controller->pool = next;
> - }
> - }
> -}
> -
> -/*
> - * Routines for managing each client's segment list -
> - * These routines handle adding and removing segments
> - * to each auth'ed client.
> - */
> -
> -static struct
> -agp_segment_priv *agp_find_seg_in_client(const struct agp_client *client,
> - unsigned long offset,
> - int size, pgprot_t page_prot)
> -{
> - struct agp_segment_priv *seg;
> - int i;
> - off_t pg_start;
> - size_t pg_count;
> -
> - pg_start = offset / 4096;
> - pg_count = size / 4096;
> - seg = *(client->segments);
> -
> - for (i = 0; i < client->num_segments; i++) {
> - if ((seg[i].pg_start == pg_start) &&
> - (seg[i].pg_count == pg_count) &&
> - (pgprot_val(seg[i].prot) == pgprot_val(page_prot))) {
> - return seg + i;
> - }
> - }
> -
> - return NULL;
> -}
> -
> -static void agp_remove_seg_from_client(struct agp_client *client)
> -{
> - DBG("client=%p", client);
> -
> - if (client->segments != NULL) {
> - if (*(client->segments) != NULL) {
> - DBG("Freeing %p from client %p", *(client->segments), client);
> - kfree(*(client->segments));
> - }
> - DBG("Freeing %p from client %p", client->segments, client);
> - kfree(client->segments);
> - client->segments = NULL;
> - }
> -}
> -
> -static void agp_add_seg_to_client(struct agp_client *client,
> - struct agp_segment_priv ** seg, int num_segments)
> -{
> - struct agp_segment_priv **prev_seg;
> -
> - prev_seg = client->segments;
> -
> - if (prev_seg != NULL)
> - agp_remove_seg_from_client(client);
> -
> - DBG("Adding seg %p (%d segments) to client %p", seg, num_segments, client);
> - client->num_segments = num_segments;
> - client->segments = seg;
> -}
> -
> -static pgprot_t agp_convert_mmap_flags(int prot)
> -{
> - unsigned long prot_bits;
> -
> - prot_bits = calc_vm_prot_bits(prot, 0) | VM_SHARED;
> - return vm_get_page_prot(prot_bits);
> -}
> -
> -int agp_create_segment(struct agp_client *client, struct agp_region *region)
> -{
> - struct agp_segment_priv **ret_seg;
> - struct agp_segment_priv *seg;
> - struct agp_segment *user_seg;
> - size_t i;
> -
> - seg = kzalloc((sizeof(struct agp_segment_priv) * region->seg_count), GFP_KERNEL);
> - if (seg == NULL) {
> - kfree(region->seg_list);
> - region->seg_list = NULL;
> - return -ENOMEM;
> - }
> - user_seg = region->seg_list;
> -
> - for (i = 0; i < region->seg_count; i++) {
> - seg[i].pg_start = user_seg[i].pg_start;
> - seg[i].pg_count = user_seg[i].pg_count;
> - seg[i].prot = agp_convert_mmap_flags(user_seg[i].prot);
> - }
> - kfree(region->seg_list);
> - region->seg_list = NULL;
> -
> - ret_seg = kmalloc(sizeof(void *), GFP_KERNEL);
> - if (ret_seg == NULL) {
> - kfree(seg);
> - return -ENOMEM;
> - }
> - *ret_seg = seg;
> - agp_add_seg_to_client(client, ret_seg, region->seg_count);
> - return 0;
> -}
> -
> -/* End - Routines for managing each client's segment list */
> -
> -/* This function must only be called when current_controller != NULL */
> -static void agp_insert_into_pool(struct agp_memory * temp)
> -{
> - struct agp_memory *prev;
> -
> - prev = agp_fe.current_controller->pool;
> -
> - if (prev != NULL) {
> - prev->prev = temp;
> - temp->next = prev;
> - }
> - agp_fe.current_controller->pool = temp;
> -}
> -
> -
> -/* File private list routines */
> -
> -struct agp_file_private *agp_find_private(pid_t pid)
> -{
> - struct agp_file_private *curr;
> -
> - curr = agp_fe.file_priv_list;
> -
> - while (curr != NULL) {
> - if (curr->my_pid == pid)
> - return curr;
> - curr = curr->next;
> - }
> -
> - return NULL;
> -}
> -
> -static void agp_insert_file_private(struct agp_file_private * priv)
> -{
> - struct agp_file_private *prev;
> -
> - prev = agp_fe.file_priv_list;
> -
> - if (prev != NULL)
> - prev->prev = priv;
> - priv->next = prev;
> - agp_fe.file_priv_list = priv;
> -}
> -
> -static void agp_remove_file_private(struct agp_file_private * priv)
> -{
> - struct agp_file_private *next;
> - struct agp_file_private *prev;
> -
> - next = priv->next;
> - prev = priv->prev;
> -
> - if (prev != NULL) {
> - prev->next = next;
> -
> - if (next != NULL)
> - next->prev = prev;
> -
> - } else {
> - if (next != NULL)
> - next->prev = NULL;
> -
> - agp_fe.file_priv_list = next;
> - }
> -}
> -
> -/* End - File flag list routines */
> -
> -/*
> - * Wrappers for agp_free_memory & agp_allocate_memory
> - * These make sure that internal lists are kept updated.
> - */
> -void agp_free_memory_wrap(struct agp_memory *memory)
> -{
> - agp_remove_from_pool(memory);
> - agp_free_memory(memory);
> -}
> -
> -struct agp_memory *agp_allocate_memory_wrap(size_t pg_count, u32 type)
> -{
> - struct agp_memory *memory;
> -
> - memory = agp_allocate_memory(agp_bridge, pg_count, type);
> - if (memory == NULL)
> - return NULL;
> -
> - agp_insert_into_pool(memory);
> - return memory;
> -}
> -
> -/* Routines for managing the list of controllers -
> - * These routines manage the current controller, and the list of
> - * controllers
> - */
> -
> -static struct agp_controller *agp_find_controller_by_pid(pid_t id)
> -{
> - struct agp_controller *controller;
> -
> - controller = agp_fe.controllers;
> -
> - while (controller != NULL) {
> - if (controller->pid == id)
> - return controller;
> - controller = controller->next;
> - }
> -
> - return NULL;
> -}
> -
> -static struct agp_controller *agp_create_controller(pid_t id)
> -{
> - struct agp_controller *controller;
> -
> - controller = kzalloc(sizeof(struct agp_controller), GFP_KERNEL);
> - if (controller == NULL)
> - return NULL;
> -
> - controller->pid = id;
> - return controller;
> -}
> -
> -static int agp_insert_controller(struct agp_controller *controller)
> -{
> - struct agp_controller *prev_controller;
> -
> - prev_controller = agp_fe.controllers;
> - controller->next = prev_controller;
> -
> - if (prev_controller != NULL)
> - prev_controller->prev = controller;
> -
> - agp_fe.controllers = controller;
> -
> - return 0;
> -}
> -
> -static void agp_remove_all_clients(struct agp_controller *controller)
> -{
> - struct agp_client *client;
> - struct agp_client *temp;
> -
> - client = controller->clients;
> -
> - while (client) {
> - struct agp_file_private *priv;
> -
> - temp = client;
> - agp_remove_seg_from_client(temp);
> - priv = agp_find_private(temp->pid);
> -
> - if (priv != NULL) {
> - clear_bit(AGP_FF_IS_VALID, &priv->access_flags);
> - clear_bit(AGP_FF_IS_CLIENT, &priv->access_flags);
> - }
> - client = client->next;
> - kfree(temp);
> - }
> -}
> -
> -static void agp_remove_all_memory(struct agp_controller *controller)
> -{
> - struct agp_memory *memory;
> - struct agp_memory *temp;
> -
> - memory = controller->pool;
> -
> - while (memory) {
> - temp = memory;
> - memory = memory->next;
> - agp_free_memory_wrap(temp);
> - }
> -}
> -
> -static int agp_remove_controller(struct agp_controller *controller)
> -{
> - struct agp_controller *prev_controller;
> - struct agp_controller *next_controller;
> -
> - prev_controller = controller->prev;
> - next_controller = controller->next;
> -
> - if (prev_controller != NULL) {
> - prev_controller->next = next_controller;
> - if (next_controller != NULL)
> - next_controller->prev = prev_controller;
> -
> - } else {
> - if (next_controller != NULL)
> - next_controller->prev = NULL;
> -
> - agp_fe.controllers = next_controller;
> - }
> -
> - agp_remove_all_memory(controller);
> - agp_remove_all_clients(controller);
> -
> - if (agp_fe.current_controller == controller) {
> - agp_fe.current_controller = NULL;
> - agp_fe.backend_acquired = false;
> - agp_backend_release(agp_bridge);
> - }
> - kfree(controller);
> - return 0;
> -}
> -
> -static void agp_controller_make_current(struct agp_controller *controller)
> -{
> - struct agp_client *clients;
> -
> - clients = controller->clients;
> -
> - while (clients != NULL) {
> - struct agp_file_private *priv;
> -
> - priv = agp_find_private(clients->pid);
> -
> - if (priv != NULL) {
> - set_bit(AGP_FF_IS_VALID, &priv->access_flags);
> - set_bit(AGP_FF_IS_CLIENT, &priv->access_flags);
> - }
> - clients = clients->next;
> - }
> -
> - agp_fe.current_controller = controller;
> -}
> -
> -static void agp_controller_release_current(struct agp_controller *controller,
> - struct agp_file_private *controller_priv)
> -{
> - struct agp_client *clients;
> -
> - clear_bit(AGP_FF_IS_VALID, &controller_priv->access_flags);
> - clients = controller->clients;
> -
> - while (clients != NULL) {
> - struct agp_file_private *priv;
> -
> - priv = agp_find_private(clients->pid);
> -
> - if (priv != NULL)
> - clear_bit(AGP_FF_IS_VALID, &priv->access_flags);
> -
> - clients = clients->next;
> - }
> -
> - agp_fe.current_controller = NULL;
> - agp_fe.used_by_controller = false;
> - agp_backend_release(agp_bridge);
> -}
> -
> -/*
> - * Routines for managing client lists -
> - * These routines are for managing the list of auth'ed clients.
> - */
> -
> -static struct agp_client
> -*agp_find_client_in_controller(struct agp_controller *controller, pid_t id)
> -{
> - struct agp_client *client;
> -
> - if (controller == NULL)
> - return NULL;
> -
> - client = controller->clients;
> -
> - while (client != NULL) {
> - if (client->pid == id)
> - return client;
> - client = client->next;
> - }
> -
> - return NULL;
> -}
> -
> -static struct agp_controller *agp_find_controller_for_client(pid_t id)
> -{
> - struct agp_controller *controller;
> -
> - controller = agp_fe.controllers;
> -
> - while (controller != NULL) {
> - if ((agp_find_client_in_controller(controller, id)) != NULL)
> - return controller;
> - controller = controller->next;
> - }
> -
> - return NULL;
> -}
> -
> -struct agp_client *agp_find_client_by_pid(pid_t id)
> -{
> - struct agp_client *temp;
> -
> - if (agp_fe.current_controller == NULL)
> - return NULL;
> -
> - temp = agp_find_client_in_controller(agp_fe.current_controller, id);
> - return temp;
> -}
> -
> -static void agp_insert_client(struct agp_client *client)
> -{
> - struct agp_client *prev_client;
> -
> - prev_client = agp_fe.current_controller->clients;
> - client->next = prev_client;
> -
> - if (prev_client != NULL)
> - prev_client->prev = client;
> -
> - agp_fe.current_controller->clients = client;
> - agp_fe.current_controller->num_clients++;
> -}
> -
> -struct agp_client *agp_create_client(pid_t id)
> -{
> - struct agp_client *new_client;
> -
> - new_client = kzalloc(sizeof(struct agp_client), GFP_KERNEL);
> - if (new_client == NULL)
> - return NULL;
> -
> - new_client->pid = id;
> - agp_insert_client(new_client);
> - return new_client;
> -}
> -
> -int agp_remove_client(pid_t id)
> -{
> - struct agp_client *client;
> - struct agp_client *prev_client;
> - struct agp_client *next_client;
> - struct agp_controller *controller;
> -
> - controller = agp_find_controller_for_client(id);
> - if (controller == NULL)
> - return -EINVAL;
> -
> - client = agp_find_client_in_controller(controller, id);
> - if (client == NULL)
> - return -EINVAL;
> -
> - prev_client = client->prev;
> - next_client = client->next;
> -
> - if (prev_client != NULL) {
> - prev_client->next = next_client;
> - if (next_client != NULL)
> - next_client->prev = prev_client;
> -
> - } else {
> - if (next_client != NULL)
> - next_client->prev = NULL;
> - controller->clients = next_client;
> - }
> -
> - controller->num_clients--;
> - agp_remove_seg_from_client(client);
> - kfree(client);
> - return 0;
> -}
> -
> -/* End - Routines for managing client lists */
> -
> -/* File Operations */
> -
> -static int agp_mmap(struct file *file, struct vm_area_struct *vma)
> -{
> - unsigned int size, current_size;
> - unsigned long offset;
> - struct agp_client *client;
> - struct agp_file_private *priv = file->private_data;
> - struct agp_kern_info kerninfo;
> -
> - mutex_lock(&(agp_fe.agp_mutex));
> -
> - if (agp_fe.backend_acquired != true)
> - goto out_eperm;
> -
> - if (!(test_bit(AGP_FF_IS_VALID, &priv->access_flags)))
> - goto out_eperm;
> -
> - agp_copy_info(agp_bridge, &kerninfo);
> - size = vma->vm_end - vma->vm_start;
> - current_size = kerninfo.aper_size;
> - current_size = current_size * 0x100000;
> - offset = vma->vm_pgoff << PAGE_SHIFT;
> - DBG("%lx:%lx", offset, offset+size);
> -
> - if (test_bit(AGP_FF_IS_CLIENT, &priv->access_flags)) {
> - if ((size + offset) > current_size)
> - goto out_inval;
> -
> - client = agp_find_client_by_pid(current->pid);
> -
> - if (client == NULL)
> - goto out_eperm;
> -
> - if (!agp_find_seg_in_client(client, offset, size, vma->vm_page_prot))
> - goto out_inval;
> -
> - DBG("client vm_ops=%p", kerninfo.vm_ops);
> - if (kerninfo.vm_ops) {
> - vma->vm_ops = kerninfo.vm_ops;
> - } else if (io_remap_pfn_range(vma, vma->vm_start,
> - (kerninfo.aper_base + offset) >> PAGE_SHIFT,
> - size,
> - pgprot_writecombine(vma->vm_page_prot))) {
> - goto out_again;
> - }
> - mutex_unlock(&(agp_fe.agp_mutex));
> - return 0;
> - }
> -
> - if (test_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags)) {
> - if (size != current_size)
> - goto out_inval;
> -
> - DBG("controller vm_ops=%p", kerninfo.vm_ops);
> - if (kerninfo.vm_ops) {
> - vma->vm_ops = kerninfo.vm_ops;
> - } else if (io_remap_pfn_range(vma, vma->vm_start,
> - kerninfo.aper_base >> PAGE_SHIFT,
> - size,
> - pgprot_writecombine(vma->vm_page_prot))) {
> - goto out_again;
> - }
> - mutex_unlock(&(agp_fe.agp_mutex));
> - return 0;
> - }
> -
> -out_eperm:
> - mutex_unlock(&(agp_fe.agp_mutex));
> - return -EPERM;
> -
> -out_inval:
> - mutex_unlock(&(agp_fe.agp_mutex));
> - return -EINVAL;
> -
> -out_again:
> - mutex_unlock(&(agp_fe.agp_mutex));
> - return -EAGAIN;
> -}
> -
> -static int agp_release(struct inode *inode, struct file *file)
> -{
> - struct agp_file_private *priv = file->private_data;
> -
> - mutex_lock(&(agp_fe.agp_mutex));
> -
> - DBG("priv=%p", priv);
> -
> - if (test_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags)) {
> - struct agp_controller *controller;
> -
> - controller = agp_find_controller_by_pid(priv->my_pid);
> -
> - if (controller != NULL) {
> - if (controller == agp_fe.current_controller)
> - agp_controller_release_current(controller, priv);
> - agp_remove_controller(controller);
> - controller = NULL;
> - }
> - }
> -
> - if (test_bit(AGP_FF_IS_CLIENT, &priv->access_flags))
> - agp_remove_client(priv->my_pid);
> -
> - agp_remove_file_private(priv);
> - kfree(priv);
> - file->private_data = NULL;
> - mutex_unlock(&(agp_fe.agp_mutex));
> - return 0;
> -}
> -
> -static int agp_open(struct inode *inode, struct file *file)
> -{
> - int minor = iminor(inode);
> - struct agp_file_private *priv;
> - struct agp_client *client;
> -
> - if (minor != AGPGART_MINOR)
> - return -ENXIO;
> -
> - mutex_lock(&(agp_fe.agp_mutex));
> -
> - priv = kzalloc(sizeof(struct agp_file_private), GFP_KERNEL);
> - if (priv == NULL) {
> - mutex_unlock(&(agp_fe.agp_mutex));
> - return -ENOMEM;
> - }
> -
> - set_bit(AGP_FF_ALLOW_CLIENT, &priv->access_flags);
> - priv->my_pid = current->pid;
> -
> - if (capable(CAP_SYS_RAWIO))
> - /* Root priv, can be controller */
> - set_bit(AGP_FF_ALLOW_CONTROLLER, &priv->access_flags);
> -
> - client = agp_find_client_by_pid(current->pid);
> -
> - if (client != NULL) {
> - set_bit(AGP_FF_IS_CLIENT, &priv->access_flags);
> - set_bit(AGP_FF_IS_VALID, &priv->access_flags);
> - }
> - file->private_data = (void *) priv;
> - agp_insert_file_private(priv);
> - DBG("private=%p, client=%p", priv, client);
> -
> - mutex_unlock(&(agp_fe.agp_mutex));
> -
> - return 0;
> -}
> -
> -static int agpioc_info_wrap(struct agp_file_private *priv, void __user *arg)
> -{
> - struct agp_info userinfo;
> - struct agp_kern_info kerninfo;
> -
> - agp_copy_info(agp_bridge, &kerninfo);
> -
> - memset(&userinfo, 0, sizeof(userinfo));
> - 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 = 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(struct agp_info)))
> - return -EFAULT;
> -
> - return 0;
> -}
> -
> -int agpioc_acquire_wrap(struct agp_file_private *priv)
> -{
> - struct agp_controller *controller;
> -
> - DBG("");
> -
> - if (!(test_bit(AGP_FF_ALLOW_CONTROLLER, &priv->access_flags)))
> - return -EPERM;
> -
> - if (agp_fe.current_controller != NULL)
> - return -EBUSY;
> -
> - if (!agp_bridge)
> - return -ENODEV;
> -
> - if (atomic_read(&agp_bridge->agp_in_use))
> - return -EBUSY;
> -
> - atomic_inc(&agp_bridge->agp_in_use);
> -
> - agp_fe.backend_acquired = true;
> -
> - controller = agp_find_controller_by_pid(priv->my_pid);
> -
> - if (controller != NULL) {
> - agp_controller_make_current(controller);
> - } else {
> - controller = agp_create_controller(priv->my_pid);
> -
> - if (controller == NULL) {
> - agp_fe.backend_acquired = false;
> - agp_backend_release(agp_bridge);
> - return -ENOMEM;
> - }
> - agp_insert_controller(controller);
> - agp_controller_make_current(controller);
> - }
> -
> - set_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags);
> - set_bit(AGP_FF_IS_VALID, &priv->access_flags);
> - return 0;
> -}
> -
> -int agpioc_release_wrap(struct agp_file_private *priv)
> -{
> - DBG("");
> - agp_controller_release_current(agp_fe.current_controller, priv);
> - return 0;
> -}
> -
> -int agpioc_setup_wrap(struct agp_file_private *priv, void __user *arg)
> -{
> - struct agp_setup mode;
> -
> - DBG("");
> - if (copy_from_user(&mode, arg, sizeof(struct agp_setup)))
> - return -EFAULT;
> -
> - agp_enable(agp_bridge, mode.agp_mode);
> - return 0;
> -}
> -
> -static int agpioc_reserve_wrap(struct agp_file_private *priv, void __user *arg)
> -{
> - struct agp_region reserve;
> - struct agp_client *client;
> - struct agp_file_private *client_priv;
> -
> - DBG("");
> - if (copy_from_user(&reserve, arg, sizeof(struct agp_region)))
> - return -EFAULT;
> -
> - if ((unsigned) reserve.seg_count >= ~0U/sizeof(struct agp_segment))
> - return -EFAULT;
> -
> - client = agp_find_client_by_pid(reserve.pid);
> -
> - if (reserve.seg_count == 0) {
> - /* remove a client */
> - client_priv = agp_find_private(reserve.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(reserve.pid);
> - } else {
> - struct agp_segment *segment;
> -
> - if (reserve.seg_count >= 16384)
> - return -EINVAL;
> -
> - segment = kmalloc((sizeof(struct agp_segment) * reserve.seg_count),
> - GFP_KERNEL);
> -
> - if (segment == NULL)
> - return -ENOMEM;
> -
> - if (copy_from_user(segment, (void __user *) reserve.seg_list,
> - sizeof(struct agp_segment) * reserve.seg_count)) {
> - kfree(segment);
> - return -EFAULT;
> - }
> - reserve.seg_list = segment;
> -
> - if (client == NULL) {
> - /* Create the client and add the segment */
> - client = agp_create_client(reserve.pid);
> -
> - if (client == NULL) {
> - kfree(segment);
> - return -ENOMEM;
> - }
> - client_priv = agp_find_private(reserve.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, &reserve);
> - }
> - /* Will never really happen */
> - return -EINVAL;
> -}
> -
> -int agpioc_protect_wrap(struct agp_file_private *priv)
> -{
> - DBG("");
> - /* This function is not currently implemented */
> - return -EINVAL;
> -}
> -
> -static int agpioc_allocate_wrap(struct agp_file_private *priv, void __user *arg)
> -{
> - struct agp_memory *memory;
> - struct agp_allocate alloc;
> -
> - DBG("");
> - if (copy_from_user(&alloc, arg, sizeof(struct agp_allocate)))
> - return -EFAULT;
> -
> - if (alloc.type >= AGP_USER_TYPES)
> - return -EINVAL;
> -
> - 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(struct agp_allocate))) {
> - agp_free_memory_wrap(memory);
> - return -EFAULT;
> - }
> - return 0;
> -}
> -
> -int agpioc_deallocate_wrap(struct agp_file_private *priv, int arg)
> -{
> - struct agp_memory *memory;
> -
> - DBG("");
> - memory = agp_find_mem_by_key(arg);
> -
> - if (memory == NULL)
> - return -EINVAL;
> -
> - agp_free_memory_wrap(memory);
> - return 0;
> -}
> -
> -static int agpioc_bind_wrap(struct agp_file_private *priv, void __user *arg)
> -{
> - struct agp_bind bind_info;
> - struct agp_memory *memory;
> -
> - DBG("");
> - if (copy_from_user(&bind_info, arg, sizeof(struct agp_bind)))
> - 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 agpioc_unbind_wrap(struct agp_file_private *priv, void __user *arg)
> -{
> - struct agp_memory *memory;
> - struct agp_unbind unbind;
> -
> - DBG("");
> - if (copy_from_user(&unbind, arg, sizeof(struct agp_unbind)))
> - return -EFAULT;
> -
> - memory = agp_find_mem_by_key(unbind.key);
> -
> - if (memory == NULL)
> - return -EINVAL;
> -
> - return agp_unbind_memory(memory);
> -}
> -
> -static long agp_ioctl(struct file *file,
> - unsigned int cmd, unsigned long arg)
> -{
> - struct agp_file_private *curr_priv = file->private_data;
> - int ret_val = -ENOTTY;
> -
> - DBG("priv=%p, cmd=%x", curr_priv, cmd);
> - mutex_lock(&(agp_fe.agp_mutex));
> -
> - if ((agp_fe.current_controller == NULL) &&
> - (cmd != AGPIOC_ACQUIRE)) {
> - ret_val = -EINVAL;
> - goto ioctl_out;
> - }
> - if ((agp_fe.backend_acquired != true) &&
> - (cmd != AGPIOC_ACQUIRE)) {
> - ret_val = -EBUSY;
> - goto ioctl_out;
> - }
> - if (cmd != AGPIOC_ACQUIRE) {
> - 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_INFO:
> - ret_val = agpioc_info_wrap(curr_priv, (void __user *) arg);
> - break;
> -
> - case AGPIOC_ACQUIRE:
> - ret_val = agpioc_acquire_wrap(curr_priv);
> - break;
> -
> - case AGPIOC_RELEASE:
> - ret_val = agpioc_release_wrap(curr_priv);
> - break;
> -
> - case AGPIOC_SETUP:
> - ret_val = agpioc_setup_wrap(curr_priv, (void __user *) arg);
> - break;
> -
> - case AGPIOC_RESERVE:
> - ret_val = agpioc_reserve_wrap(curr_priv, (void __user *) arg);
> - break;
> -
> - case AGPIOC_PROTECT:
> - ret_val = agpioc_protect_wrap(curr_priv);
> - break;
> -
> - case AGPIOC_ALLOCATE:
> - ret_val = agpioc_allocate_wrap(curr_priv, (void __user *) arg);
> - break;
> -
> - case AGPIOC_DEALLOCATE:
> - ret_val = agpioc_deallocate_wrap(curr_priv, (int) arg);
> - break;
> -
> - case AGPIOC_BIND:
> - ret_val = agpioc_bind_wrap(curr_priv, (void __user *) arg);
> - break;
> -
> - case AGPIOC_UNBIND:
> - ret_val = agpioc_unbind_wrap(curr_priv, (void __user *) arg);
> - break;
> -
> - case AGPIOC_CHIPSET_FLUSH:
> - break;
> - }
> -
> -ioctl_out:
> - DBG("ioctl returns %d\n", ret_val);
> - mutex_unlock(&(agp_fe.agp_mutex));
> - return ret_val;
> -}
> -
> -static const struct file_operations agp_fops =
> -{
> - .owner = THIS_MODULE,
> - .llseek = no_llseek,
> - .unlocked_ioctl = agp_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = compat_agp_ioctl,
> -#endif
> - .mmap = agp_mmap,
> - .open = agp_open,
> - .release = agp_release,
> -};
> -
> -static struct miscdevice agp_miscdev =
> -{
> - .minor = AGPGART_MINOR,
> - .name = "agpgart",
> - .fops = &agp_fops
> -};
> -
> -int agp_frontend_initialize(void)
> -{
> - memset(&agp_fe, 0, sizeof(struct agp_front_data));
> - mutex_init(&(agp_fe.agp_mutex));
> -
> - if (misc_register(&agp_miscdev)) {
> - printk(KERN_ERR PFX "unable to get minor: %d\n", AGPGART_MINOR);
> - return -EIO;
> - }
> - return 0;
> -}
> -
> -void agp_frontend_cleanup(void)
> -{
> - misc_deregister(&agp_miscdev);
> -}
> --
> 2.42.1
>
