116 lines
4.1 KiB
C
116 lines
4.1 KiB
C
/* agpsupport-pre24.h -- Support for pre-2.4.0 kernels -*- linux-c -*-
|
|
* Created: Mon Nov 13 10:54:15 2000 by faith@valinux.com
|
|
*
|
|
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
|
|
* All Rights Reserved.
|
|
*
|
|
* 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 (including the next
|
|
* paragraph) 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
|
|
* PRECISION INSIGHT AND/OR ITS SUPPLIERS 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.
|
|
*
|
|
* Author: Rickard E. (Rik) Faith <faith@valinux.com>
|
|
*
|
|
*/
|
|
|
|
#ifndef _AGPSUPPORT_PRE24_H_
|
|
#define _AGPSUPPORT_PRE24_H_
|
|
typedef struct {
|
|
void (*free_memory)(agp_memory *);
|
|
agp_memory *(*allocate_memory)(size_t, u32);
|
|
int (*bind_memory)(agp_memory *, off_t);
|
|
int (*unbind_memory)(agp_memory *);
|
|
void (*enable)(u32);
|
|
int (*acquire)(void);
|
|
void (*release)(void);
|
|
void (*copy_info)(agp_kern_info *);
|
|
} drm_agp_t;
|
|
|
|
static drm_agp_t drm_agp_struct = {
|
|
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
|
|
};
|
|
|
|
/* The C standard says that 'void *' is not guaranteed to hold a function
|
|
pointer, so we use this union to define a generic pointer that is
|
|
guaranteed to hold any of the function pointers we care about. */
|
|
typedef union {
|
|
void (*free_memory)(agp_memory *);
|
|
agp_memory *(*allocate_memory)(size_t, u32);
|
|
int (*bind_memory)(agp_memory *, off_t);
|
|
int (*unbind_memory)(agp_memory *);
|
|
void (*enable)(u32);
|
|
int (*acquire)(void);
|
|
void (*release)(void);
|
|
void (*copy_info)(agp_kern_info *);
|
|
unsigned long address;
|
|
} drm_agp_func_u;
|
|
|
|
typedef struct drm_agp_fill {
|
|
const char *name;
|
|
drm_agp_func_u *f;
|
|
} drm_agp_fill_t;
|
|
|
|
static drm_agp_fill_t drm_agp_fill[] = {
|
|
{ __MODULE_STRING(agp_free_memory),
|
|
(drm_agp_func_u *)&drm_agp_struct.free_memory },
|
|
{ __MODULE_STRING(agp_allocate_memory),
|
|
(drm_agp_func_u *)&drm_agp_struct.allocate_memory },
|
|
{ __MODULE_STRING(agp_bind_memory),
|
|
(drm_agp_func_u *)&drm_agp_struct.bind_memory },
|
|
{ __MODULE_STRING(agp_unbind_memory),
|
|
(drm_agp_func_u *)&drm_agp_struct.unbind_memory },
|
|
{ __MODULE_STRING(agp_enable),
|
|
(drm_agp_func_u *)&drm_agp_struct.enable },
|
|
{ __MODULE_STRING(agp_backend_acquire),
|
|
(drm_agp_func_u *)&drm_agp_struct.acquire },
|
|
{ __MODULE_STRING(agp_backend_release),
|
|
(drm_agp_func_u *)&drm_agp_struct.release },
|
|
{ __MODULE_STRING(agp_copy_info),
|
|
(drm_agp_func_u *)&drm_agp_struct.copy_info },
|
|
{ NULL, NULL }
|
|
};
|
|
|
|
#define DRM_AGP_GET _drm_agp_get()
|
|
#define DRM_AGP_PUT _drm_agp_put()
|
|
|
|
static drm_agp_t *_drm_agp_get(void)
|
|
{
|
|
drm_agp_fill_t *fill;
|
|
int agp_available = 1;
|
|
|
|
for (fill = &drm_agp_fill[0]; fill->name; fill++) {
|
|
char *n = (char *)fill->name;
|
|
*fill->f = (drm_agp_func_u)get_module_symbol(NULL, n);
|
|
DRM_DEBUG("%s resolves to 0x%08lx\n", n, (*fill->f).address);
|
|
if (!(*fill->f).address) agp_available = 0;
|
|
}
|
|
return &drm_agp_struct;
|
|
}
|
|
|
|
static void _drm_agp_put(void)
|
|
{
|
|
drm_agp_fill_t *fill;
|
|
|
|
for (fill = &drm_agp_fill[0]; fill->name; fill++) {
|
|
#if LINUX_VERSION_CODE >= 0x020400
|
|
if ((*fill->f).address) put_module_symbol((*fill->f).address);
|
|
#endif
|
|
(*fill->f).address = 0;
|
|
}
|
|
}
|
|
#endif
|