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291 lines
7.4 KiB
291 lines
7.4 KiB
/* |
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* AGPGART driver frontend compatibility ioctls |
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* Copyright (C) 2004 Silicon Graphics, Inc. |
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* Copyright (C) 2002-2003 Dave Jones |
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* Copyright (C) 1999 Jeff Hartmann |
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* Copyright (C) 1999 Precision Insight, Inc. |
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* Copyright (C) 1999 Xi Graphics, Inc. |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a |
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* copy of this software and associated documentation files (the "Software"), |
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* to deal in the Software without restriction, including without limitation |
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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* and/or sell copies of the Software, and to permit persons to whom the |
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* Software is furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included |
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* in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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* JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, |
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE |
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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* |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/pci.h> |
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#include <linux/fs.h> |
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#include <linux/agpgart.h> |
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#include <linux/slab.h> |
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#include <linux/uaccess.h> |
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#include "agp.h" |
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#include "compat_ioctl.h" |
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static int compat_agpioc_info_wrap(struct agp_file_private *priv, void __user *arg) |
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{ |
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struct agp_info32 userinfo; |
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struct agp_kern_info kerninfo; |
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agp_copy_info(agp_bridge, &kerninfo); |
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userinfo.version.major = kerninfo.version.major; |
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userinfo.version.minor = kerninfo.version.minor; |
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userinfo.bridge_id = kerninfo.device->vendor | |
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(kerninfo.device->device << 16); |
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userinfo.agp_mode = kerninfo.mode; |
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userinfo.aper_base = (compat_long_t)kerninfo.aper_base; |
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userinfo.aper_size = kerninfo.aper_size; |
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userinfo.pg_total = userinfo.pg_system = kerninfo.max_memory; |
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userinfo.pg_used = kerninfo.current_memory; |
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if (copy_to_user(arg, &userinfo, sizeof(userinfo))) |
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return -EFAULT; |
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return 0; |
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} |
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static int compat_agpioc_reserve_wrap(struct agp_file_private *priv, void __user *arg) |
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{ |
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struct agp_region32 ureserve; |
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struct agp_region kreserve; |
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struct agp_client *client; |
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struct agp_file_private *client_priv; |
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DBG(""); |
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if (copy_from_user(&ureserve, arg, sizeof(ureserve))) |
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return -EFAULT; |
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if ((unsigned) ureserve.seg_count >= ~0U/sizeof(struct agp_segment32)) |
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return -EFAULT; |
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kreserve.pid = ureserve.pid; |
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kreserve.seg_count = ureserve.seg_count; |
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client = agp_find_client_by_pid(kreserve.pid); |
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if (kreserve.seg_count == 0) { |
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/* remove a client */ |
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client_priv = agp_find_private(kreserve.pid); |
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if (client_priv != NULL) { |
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set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags); |
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set_bit(AGP_FF_IS_VALID, &client_priv->access_flags); |
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} |
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if (client == NULL) { |
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/* client is already removed */ |
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return 0; |
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} |
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return agp_remove_client(kreserve.pid); |
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} else { |
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struct agp_segment32 *usegment; |
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struct agp_segment *ksegment; |
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int seg; |
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if (ureserve.seg_count >= 16384) |
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return -EINVAL; |
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usegment = kmalloc_array(ureserve.seg_count, |
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sizeof(*usegment), |
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GFP_KERNEL); |
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if (!usegment) |
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return -ENOMEM; |
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ksegment = kmalloc_array(kreserve.seg_count, |
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sizeof(*ksegment), |
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GFP_KERNEL); |
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if (!ksegment) { |
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kfree(usegment); |
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return -ENOMEM; |
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} |
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if (copy_from_user(usegment, (void __user *) ureserve.seg_list, |
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sizeof(*usegment) * ureserve.seg_count)) { |
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kfree(usegment); |
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kfree(ksegment); |
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return -EFAULT; |
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} |
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for (seg = 0; seg < ureserve.seg_count; seg++) { |
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ksegment[seg].pg_start = usegment[seg].pg_start; |
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ksegment[seg].pg_count = usegment[seg].pg_count; |
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ksegment[seg].prot = usegment[seg].prot; |
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} |
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kfree(usegment); |
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kreserve.seg_list = ksegment; |
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if (client == NULL) { |
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/* Create the client and add the segment */ |
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client = agp_create_client(kreserve.pid); |
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if (client == NULL) { |
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kfree(ksegment); |
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return -ENOMEM; |
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} |
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client_priv = agp_find_private(kreserve.pid); |
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if (client_priv != NULL) { |
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set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags); |
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set_bit(AGP_FF_IS_VALID, &client_priv->access_flags); |
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} |
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} |
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return agp_create_segment(client, &kreserve); |
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} |
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/* Will never really happen */ |
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return -EINVAL; |
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} |
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static int compat_agpioc_allocate_wrap(struct agp_file_private *priv, void __user *arg) |
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{ |
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struct agp_memory *memory; |
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struct agp_allocate32 alloc; |
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DBG(""); |
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if (copy_from_user(&alloc, arg, sizeof(alloc))) |
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return -EFAULT; |
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memory = agp_allocate_memory_wrap(alloc.pg_count, alloc.type); |
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if (memory == NULL) |
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return -ENOMEM; |
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alloc.key = memory->key; |
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alloc.physical = memory->physical; |
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if (copy_to_user(arg, &alloc, sizeof(alloc))) { |
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agp_free_memory_wrap(memory); |
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return -EFAULT; |
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} |
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return 0; |
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} |
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static int compat_agpioc_bind_wrap(struct agp_file_private *priv, void __user *arg) |
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{ |
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struct agp_bind32 bind_info; |
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struct agp_memory *memory; |
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DBG(""); |
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if (copy_from_user(&bind_info, arg, sizeof(bind_info))) |
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return -EFAULT; |
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memory = agp_find_mem_by_key(bind_info.key); |
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if (memory == NULL) |
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return -EINVAL; |
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return agp_bind_memory(memory, bind_info.pg_start); |
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} |
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static int compat_agpioc_unbind_wrap(struct agp_file_private *priv, void __user *arg) |
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{ |
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struct agp_memory *memory; |
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struct agp_unbind32 unbind; |
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DBG(""); |
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if (copy_from_user(&unbind, arg, sizeof(unbind))) |
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return -EFAULT; |
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memory = agp_find_mem_by_key(unbind.key); |
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if (memory == NULL) |
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return -EINVAL; |
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return agp_unbind_memory(memory); |
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} |
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long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
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{ |
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struct agp_file_private *curr_priv = file->private_data; |
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int ret_val = -ENOTTY; |
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mutex_lock(&(agp_fe.agp_mutex)); |
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if ((agp_fe.current_controller == NULL) && |
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(cmd != AGPIOC_ACQUIRE32)) { |
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ret_val = -EINVAL; |
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goto ioctl_out; |
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} |
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if ((agp_fe.backend_acquired != true) && |
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(cmd != AGPIOC_ACQUIRE32)) { |
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ret_val = -EBUSY; |
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goto ioctl_out; |
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} |
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if (cmd != AGPIOC_ACQUIRE32) { |
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if (!(test_bit(AGP_FF_IS_CONTROLLER, &curr_priv->access_flags))) { |
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ret_val = -EPERM; |
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goto ioctl_out; |
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} |
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/* Use the original pid of the controller, |
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* in case it's threaded */ |
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if (agp_fe.current_controller->pid != curr_priv->my_pid) { |
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ret_val = -EBUSY; |
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goto ioctl_out; |
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} |
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} |
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switch (cmd) { |
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case AGPIOC_INFO32: |
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ret_val = compat_agpioc_info_wrap(curr_priv, (void __user *) arg); |
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break; |
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case AGPIOC_ACQUIRE32: |
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ret_val = agpioc_acquire_wrap(curr_priv); |
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break; |
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case AGPIOC_RELEASE32: |
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ret_val = agpioc_release_wrap(curr_priv); |
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break; |
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case AGPIOC_SETUP32: |
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ret_val = agpioc_setup_wrap(curr_priv, (void __user *) arg); |
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break; |
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case AGPIOC_RESERVE32: |
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ret_val = compat_agpioc_reserve_wrap(curr_priv, (void __user *) arg); |
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break; |
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case AGPIOC_PROTECT32: |
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ret_val = agpioc_protect_wrap(curr_priv); |
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break; |
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case AGPIOC_ALLOCATE32: |
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ret_val = compat_agpioc_allocate_wrap(curr_priv, (void __user *) arg); |
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break; |
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case AGPIOC_DEALLOCATE32: |
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ret_val = agpioc_deallocate_wrap(curr_priv, (int) arg); |
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break; |
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case AGPIOC_BIND32: |
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ret_val = compat_agpioc_bind_wrap(curr_priv, (void __user *) arg); |
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break; |
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case AGPIOC_UNBIND32: |
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ret_val = compat_agpioc_unbind_wrap(curr_priv, (void __user *) arg); |
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break; |
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case AGPIOC_CHIPSET_FLUSH32: |
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break; |
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} |
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ioctl_out: |
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DBG("ioctl returns %d\n", ret_val); |
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mutex_unlock(&(agp_fe.agp_mutex)); |
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return ret_val; |
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} |
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