The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/agp/agpvar.h

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    1 /*-
    2  * Copyright (c) 2000 Doug Rabson
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  *      $FreeBSD: releng/10.3/sys/dev/agp/agpvar.h 275406 2014-12-02 13:46:13Z tijl $
   27  */
   28 
   29 #ifndef _PCI_AGPVAR_H_
   30 #define _PCI_AGPVAR_H_
   31 
   32 /*
   33  * The AGP chipset can be acquired by user or kernel code. If the
   34  * chipset has already been acquired, it cannot be acquired by another 
   35  * user until the previous user has released it.
   36  */
   37 enum agp_acquire_state {
   38         AGP_ACQUIRE_FREE,
   39         AGP_ACQUIRE_USER,
   40         AGP_ACQUIRE_KERNEL
   41 };
   42 
   43 /*
   44  * This structure is used to query the state of the AGP system.
   45  */
   46 struct agp_info {
   47         u_int32_t       ai_mode;
   48         vm_offset_t     ai_aperture_base;
   49         vm_size_t       ai_aperture_size;
   50         vm_size_t       ai_memory_allowed;
   51         vm_size_t       ai_memory_used;
   52         u_int32_t       ai_devid;
   53 };
   54 
   55 struct agp_memory_info {
   56         vm_size_t       ami_size;       /* size in bytes */
   57         vm_offset_t     ami_physical;   /* bogus hack for i810 */
   58         vm_offset_t     ami_offset;     /* page offset if bound */
   59         int             ami_is_bound;   /* non-zero if bound */
   60 };
   61 
   62 /*
   63  * Find the AGP device and return it.
   64  */
   65 device_t agp_find_device(void);
   66 
   67 /*
   68  * Return the current owner of the AGP chipset.
   69  */
   70 enum agp_acquire_state agp_state(device_t dev);
   71 
   72 /*
   73  * Query the state of the AGP system.
   74  */
   75 void agp_get_info(device_t dev, struct agp_info *info);
   76 
   77 /*
   78  * Acquire the AGP chipset for use by the kernel. Returns EBUSY if the
   79  * AGP chipset is already acquired by another user. 
   80  */
   81 int agp_acquire(device_t dev);
   82 
   83 /*
   84  * Release the AGP chipset.
   85  */
   86 int agp_release(device_t dev);
   87 
   88 /*
   89  * Enable the agp hardware with the relavent mode. The mode bits are
   90  * defined in <dev/agp/agpreg.h>
   91  */
   92 int agp_enable(device_t dev, u_int32_t mode);
   93 
   94 /*
   95  * Allocate physical memory suitable for mapping into the AGP
   96  * aperture.  The value returned is an opaque handle which can be
   97  * passed to agp_bind(), agp_unbind() or agp_deallocate().
   98  */
   99 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes);
  100 
  101 /*
  102  * Free memory which was allocated with agp_allocate().
  103  */
  104 void agp_free_memory(device_t dev, void *handle);
  105 
  106 /*
  107  * Bind memory allocated with agp_allocate() at a given offset within
  108  * the AGP aperture. Returns EINVAL if the memory is already bound or
  109  * the offset is not at an AGP page boundary.
  110  */
  111 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset);
  112 
  113 /*
  114  * Unbind memory from the AGP aperture. Returns EINVAL if the memory
  115  * is not bound.
  116  */
  117 int agp_unbind_memory(device_t dev, void *handle);
  118 
  119 /*
  120  * Retrieve information about a memory block allocated with
  121  * agp_alloc_memory().
  122  */
  123 void agp_memory_info(device_t dev, void *handle, struct agp_memory_info *mi);
  124 
  125 /*
  126  * Bind a set of pages at a given offset within the AGP aperture.
  127  * Returns EINVAL if the given size or offset is not at an AGP page boundary.
  128  */
  129 int agp_bind_pages(device_t dev, vm_page_t *pages, vm_size_t size,
  130                    vm_offset_t offset);
  131 
  132 /*
  133  * Unbind a set of pages from the AGP aperture.
  134  * Returns EINVAL if the given size or offset is not at an AGP page boundary.
  135  */
  136 int agp_unbind_pages(device_t dev, vm_size_t size, vm_offset_t offset);
  137 
  138 #define AGP_NORMAL_MEMORY 0
  139 
  140 #define AGP_USER_TYPES (1 << 16)
  141 #define AGP_USER_MEMORY (AGP_USER_TYPES)
  142 #define AGP_USER_CACHED_MEMORY (AGP_USER_TYPES + 1)
  143 
  144 #endif /* !_PCI_AGPVAR_H_ */

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