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/* $OpenBSD: drm_agpsupport.c,v 1.29 2022/01/14 06:52:58 jsg Exp $ */
/*-
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* 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
* VA LINUX SYSTEMS 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>
* Gareth Hughes <gareth@valinux.com>
*
*/
/*
* Support code for tying the kernel AGP support to DRM drivers.
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <asm/agp.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/drm_print.h>
#include "drm_legacy.h"
#if IS_ENABLED(CONFIG_AGP)
int
drm_legacy_agp_info(struct drm_device * dev, struct drm_agp_info *info)
{
struct agp_info *kern;
if (dev->agp == NULL || !dev->agp->acquired)
return (EINVAL);
kern = &dev->agp->info;
agp_get_info(dev->agp->agpdev, kern);
info->agp_version_major = 1;
info->agp_version_minor = 0;
info->mode = kern->ai_mode;
info->aperture_base = kern->ai_aperture_base;
info->aperture_size = kern->ai_aperture_size;
info->memory_allowed = kern->ai_memory_allowed;
info->memory_used = kern->ai_memory_used;
info->id_vendor = kern->ai_devid & 0xffff;
info->id_device = kern->ai_devid >> 16;
return (0);
}
int
drm_legacy_agp_acquire(struct drm_device *dev)
{
int retcode;
if (dev->agp == NULL || dev->agp->acquired)
return (EINVAL);
retcode = agp_acquire(dev->agp->agpdev);
if (retcode)
return (retcode);
dev->agp->acquired = 1;
return (0);
}
int
drm_legacy_agp_release(struct drm_device * dev)
{
if (dev->agp == NULL || !dev->agp->acquired)
return (EINVAL);
agp_release(dev->agp->agpdev);
dev->agp->acquired = 0;
return (0);
}
int
drm_legacy_agp_enable(struct drm_device *dev, drm_agp_mode_t mode)
{
int retcode = 0;
if (dev->agp == NULL || !dev->agp->acquired)
return (EINVAL);
dev->agp->mode = mode.mode;
if ((retcode = agp_enable(dev->agp->agpdev, mode.mode)) == 0)
dev->agp->enabled = 1;
return (retcode);
}
void
drm_legacy_agp_takedown(struct drm_device *dev)
{
if (dev->agp == NULL)
return;
drm_legacy_agp_release(dev);
dev->agp->enabled = 0;
}
struct drm_agp_head *
drm_legacy_agp_init(struct drm_device *dev)
{
struct agp_softc *agpdev;
struct drm_agp_head *head = NULL;
int agp_available = 1;
agpdev = agp_find_device(0);
if (agpdev == NULL)
agp_available = 0;
DRM_DEBUG("agp_available = %d\n", agp_available);
if (agp_available) {
head = mallocarray(1, sizeof(*head), M_DRM, M_NOWAIT | M_ZERO);
if (head == NULL)
return (NULL);
head->agpdev = agpdev;
agp_get_info(agpdev, &head->info);
head->base = head->info.ai_aperture_base;
head->cant_use_aperture = (head->base == 0);
TAILQ_INIT(&head->memory);
}
return (head);
}
#endif /* IS_ENABLED(CONFIG_AGP) */
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