+++ /dev/null
-/*
- * 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;
-}
-
+++ /dev/null
-/*
- * 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);
-}
projects / linux-2.6-microblaze.git / commitdiff