152 lines
3.8 KiB
C
152 lines
3.8 KiB
C
/* $OpenBSD: drm_agpsupport.c,v 1.29 2022/01/14 06:52:58 jsg Exp $ */
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/*-
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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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 (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* 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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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Author:
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* Rickard E. (Rik) Faith <faith@valinux.com>
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* Gareth Hughes <gareth@valinux.com>
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*
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*/
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/*
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* Support code for tying the kernel AGP support to DRM drivers.
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <asm/agp.h>
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#include <drm/drm_device.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_file.h>
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#include <drm/drm_print.h>
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#include "drm_legacy.h"
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#if IS_ENABLED(CONFIG_AGP)
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int
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drm_legacy_agp_info(struct drm_device * dev, struct drm_agp_info *info)
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{
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struct agp_info *kern;
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if (dev->agp == NULL || !dev->agp->acquired)
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return (EINVAL);
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kern = &dev->agp->info;
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agp_get_info(dev->agp->agpdev, kern);
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info->agp_version_major = 1;
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info->agp_version_minor = 0;
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info->mode = kern->ai_mode;
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info->aperture_base = kern->ai_aperture_base;
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info->aperture_size = kern->ai_aperture_size;
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info->memory_allowed = kern->ai_memory_allowed;
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info->memory_used = kern->ai_memory_used;
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info->id_vendor = kern->ai_devid & 0xffff;
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info->id_device = kern->ai_devid >> 16;
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return (0);
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}
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int
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drm_legacy_agp_acquire(struct drm_device *dev)
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{
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int retcode;
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if (dev->agp == NULL || dev->agp->acquired)
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return (EINVAL);
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retcode = agp_acquire(dev->agp->agpdev);
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if (retcode)
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return (retcode);
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dev->agp->acquired = 1;
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return (0);
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}
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int
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drm_legacy_agp_release(struct drm_device * dev)
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{
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if (dev->agp == NULL || !dev->agp->acquired)
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return (EINVAL);
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agp_release(dev->agp->agpdev);
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dev->agp->acquired = 0;
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return (0);
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}
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int
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drm_legacy_agp_enable(struct drm_device *dev, drm_agp_mode_t mode)
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{
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int retcode = 0;
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if (dev->agp == NULL || !dev->agp->acquired)
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return (EINVAL);
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dev->agp->mode = mode.mode;
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if ((retcode = agp_enable(dev->agp->agpdev, mode.mode)) == 0)
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dev->agp->enabled = 1;
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return (retcode);
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}
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void
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drm_legacy_agp_takedown(struct drm_device *dev)
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{
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if (dev->agp == NULL)
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return;
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drm_legacy_agp_release(dev);
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dev->agp->enabled = 0;
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}
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struct drm_agp_head *
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drm_legacy_agp_init(struct drm_device *dev)
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{
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struct agp_softc *agpdev;
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struct drm_agp_head *head = NULL;
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int agp_available = 1;
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agpdev = agp_find_device(0);
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if (agpdev == NULL)
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agp_available = 0;
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DRM_DEBUG("agp_available = %d\n", agp_available);
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if (agp_available) {
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head = mallocarray(1, sizeof(*head), M_DRM, M_NOWAIT | M_ZERO);
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if (head == NULL)
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return (NULL);
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head->agpdev = agpdev;
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agp_get_info(agpdev, &head->info);
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head->base = head->info.ai_aperture_base;
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head->cant_use_aperture = (head->base == 0);
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TAILQ_INIT(&head->memory);
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}
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return (head);
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}
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#endif /* IS_ENABLED(CONFIG_AGP) */
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