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NetBSD/sys/dev/drm/drm_agpsupport.c

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/* drm_agpsupport.h -- DRM support for AGP/GART backend -*- linux-c -*-
* Created: Mon Dec 13 09:56:45 1999 by faith@precisioninsight.com
*/
/*-
* 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>
*
*/
#include <sys/cdefs.h>
/*
__FBSDID("$FreeBSD: src/sys/dev/drm/drm_agpsupport.c,v 1.5 2006/04/09 20:45:44 anholt Exp $");
*/
#include "drmP.h"
#ifdef __FreeBSD__
#include <pci/agpreg.h>
#include <dev/pci/pcireg.h>
#endif
/* Returns 1 if AGP or 0 if not. */
static int
drm_device_find_capability(drm_device_t *dev, int cap)
{
#ifdef __FreeBSD__
#if __FreeBSD_version >= 700010
return (pci_find_extcap(dev->device, cap, NULL) == 0);
#else
/* Code taken from agp.c. IWBNI that was a public interface. */
u_int32_t status;
u_int8_t ptr, next;
/*
* Check the CAP_LIST bit of the PCI status register first.
*/
status = pci_read_config(dev->device, PCIR_STATUS, 2);
if (!(status & 0x10))
return 0;
/*
* Traverse the capabilities list.
*/
for (ptr = pci_read_config(dev->device, AGP_CAPPTR, 1);
ptr != 0;
ptr = next) {
u_int32_t capid = pci_read_config(dev->device, ptr, 4);
next = AGP_CAPID_GET_NEXT_PTR(capid);
/*
* If this capability entry ID is cap, then we are done.
*/
if (AGP_CAPID_GET_CAP_ID(capid) == cap)
return 1;
}
return 0;
#endif
#else
#ifdef __NetBSD__
return pci_get_capability(dev->pa.pa_pc, dev->pa.pa_tag, cap,
NULL, NULL);
#endif
/* XXX: fill me in for non-FreeBSD */
return 1;
#endif
}
int drm_device_is_agp(drm_device_t *dev)
{
if (dev->driver.device_is_agp != NULL) {
int ret;
/* device_is_agp returns a tristate, 0 = not AGP, 1 = definitely
* AGP, 2 = fall back to PCI capability
*/
ret = (*dev->driver.device_is_agp)(dev);
if (ret != DRM_MIGHT_BE_AGP)
return ret;
}
return (drm_device_find_capability(dev, PCIY_AGP));
}
int drm_device_is_pcie(drm_device_t *dev)
{
return (drm_device_find_capability(dev, PCIY_EXPRESS));
}
int drm_agp_info(drm_device_t * dev, drm_agp_info_t *info)
{
struct agp_info *kern;
if (!dev->agp || !dev->agp->acquired)
return EINVAL;
kern = &dev->agp->info;
#ifndef DRM_NO_AGP
agp_get_info(dev->agp->agpdev, kern);
#endif
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_agp_info_ioctl(DRM_IOCTL_ARGS)
{
int err;
drm_agp_info_t info;
DRM_DEVICE;
err = drm_agp_info(dev, &info);
if (err != 0)
return err;
*(drm_agp_info_t *) data = info;
return 0;
}
int drm_agp_acquire_ioctl(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
return drm_agp_acquire(dev);
}
int drm_agp_acquire(drm_device_t *dev)
{
#ifndef DRM_NO_AGP
int retcode;
if (!dev->agp || dev->agp->acquired)
return EINVAL;
retcode = agp_acquire(dev->agp->agpdev);
if (retcode)
return retcode;
dev->agp->acquired = 1;
#endif
return 0;
}
int drm_agp_release_ioctl(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
return drm_agp_release(dev);
}
int drm_agp_release(drm_device_t * dev)
{
#ifndef DRM_NO_AGP
if (!dev->agp || !dev->agp->acquired)
return EINVAL;
agp_release(dev->agp->agpdev);
dev->agp->acquired = 0;
#endif
return 0;
}
int drm_agp_enable(drm_device_t *dev, drm_agp_mode_t mode)
{
#ifndef DRM_NO_AGP
if (!dev->agp || !dev->agp->acquired)
return EINVAL;
dev->agp->mode = mode.mode;
agp_enable(dev->agp->agpdev, mode.mode);
dev->agp->base = dev->agp->info.ai_aperture_base;
dev->agp->enabled = 1;
#endif
return 0;
}
int drm_agp_enable_ioctl(DRM_IOCTL_ARGS)
{
drm_agp_mode_t mode;
DRM_DEVICE;
mode = *(drm_agp_mode_t *) data;
return drm_agp_enable(dev, mode);
}
int drm_agp_alloc(drm_device_t *dev, drm_agp_buffer_t *request)
{
#ifndef DRM_NO_AGP
drm_agp_mem_t *entry;
void *handle;
unsigned long pages;
u_int32_t type;
struct agp_memory_info info;
if (!dev->agp || !dev->agp->acquired)
return EINVAL;
entry = malloc(sizeof(*entry), M_DRM, M_NOWAIT | M_ZERO);
if (entry == NULL)
return ENOMEM;
pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
type = (u_int32_t) request->type;
DRM_UNLOCK();
handle = drm_agp_allocate_memory(pages, type);
DRM_LOCK();
if (handle == NULL) {
free(entry, M_DRM);
return ENOMEM;
}
entry->handle = handle;
entry->bound = 0;
entry->pages = pages;
entry->prev = NULL;
entry->next = dev->agp->memory;
if (dev->agp->memory)
dev->agp->memory->prev = entry;
dev->agp->memory = entry;
agp_memory_info(dev->agp->agpdev, entry->handle, &info);
request->handle = (unsigned long) entry->handle;
request->physical = info.ami_physical;
#endif
return 0;
}
int drm_agp_alloc_ioctl(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_agp_buffer_t request;
int retcode;
request = *(drm_agp_buffer_t *) data;
DRM_LOCK();
retcode = drm_agp_alloc(dev, &request);
DRM_UNLOCK();
*(drm_agp_buffer_t *) data = request;
return retcode;
}
static drm_agp_mem_t * drm_agp_lookup_entry(drm_device_t *dev, void *handle)
{
drm_agp_mem_t *entry;
for (entry = dev->agp->memory; entry; entry = entry->next) {
if (entry->handle == handle) return entry;
}
return NULL;
}
int drm_agp_unbind(drm_device_t *dev, drm_agp_binding_t *request)
{
drm_agp_mem_t *entry;
int retcode;
if (!dev->agp || !dev->agp->acquired)
return EINVAL;
entry = drm_agp_lookup_entry(dev, (void *)request->handle);
if (entry == NULL || !entry->bound)
return EINVAL;
DRM_UNLOCK();
retcode = drm_agp_unbind_memory(entry->handle);
DRM_LOCK();
if (retcode == 0)
entry->bound = 0;
return retcode;
}
int drm_agp_unbind_ioctl(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_agp_binding_t request;
int retcode;
request = *(drm_agp_binding_t *) data;
DRM_LOCK();
retcode = drm_agp_unbind(dev, &request);
DRM_UNLOCK();
return retcode;
}
int drm_agp_bind(drm_device_t *dev, drm_agp_binding_t *request)
{
drm_agp_mem_t *entry;
int retcode;
int page;
if (!dev->agp || !dev->agp->acquired)
return EINVAL;
DRM_DEBUG("agp_bind, page_size=%x\n", PAGE_SIZE);
entry = drm_agp_lookup_entry(dev, (void *)request->handle);
if (entry == NULL || entry->bound)
return EINVAL;
page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE;
DRM_UNLOCK();
retcode = drm_agp_bind_memory(entry->handle, page);
DRM_LOCK();
if (retcode == 0)
entry->bound = dev->agp->base + (page << PAGE_SHIFT);
return retcode;
}
int drm_agp_bind_ioctl(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_agp_binding_t request;
int retcode;
request = *(drm_agp_binding_t *) data;
DRM_LOCK();
retcode = drm_agp_bind(dev, &request);
DRM_UNLOCK();
return retcode;
}
int drm_agp_free(drm_device_t *dev, drm_agp_buffer_t *request)
{
drm_agp_mem_t *entry;
if (!dev->agp || !dev->agp->acquired)
return EINVAL;
entry = drm_agp_lookup_entry(dev, (void*)request->handle);
if (entry == NULL)
return EINVAL;
if (entry->prev)
entry->prev->next = entry->next;
else
dev->agp->memory = entry->next;
if (entry->next)
entry->next->prev = entry->prev;
DRM_UNLOCK();
if (entry->bound)
drm_agp_unbind_memory(entry->handle);
drm_agp_free_memory(entry->handle);
DRM_LOCK();
free(entry, M_DRM);
return 0;
}
int drm_agp_free_ioctl(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_agp_buffer_t request;
int retcode;
request = *(drm_agp_buffer_t *) data;
DRM_LOCK();
retcode = drm_agp_free(dev, &request);
DRM_UNLOCK();
return retcode;
}
drm_agp_head_t *drm_agp_init(void)
{
device_t agpdev;
drm_agp_head_t *head = NULL;
int agp_available = 1;
agpdev = DRM_AGP_FIND_DEVICE();
if (!agpdev)
agp_available = 0;
DRM_DEBUG("agp_available = %d\n", agp_available);
if (agp_available) {
head = malloc(sizeof(*head), M_DRM, M_NOWAIT | M_ZERO);
if (head == NULL)
return NULL;
head->agpdev = agpdev;
#ifndef DRM_NO_AGP
agp_get_info(agpdev, &head->info);
#endif
head->memory = NULL;
DRM_INFO("AGP at 0x%08lx %dMB\n",
(long)head->info.ai_aperture_base,
(int)(head->info.ai_aperture_size >> 20));
}
return head;
}
void *drm_agp_allocate_memory(size_t pages, u32 type)
{
device_t agpdev;
agpdev = DRM_AGP_FIND_DEVICE();
if (!agpdev)
return NULL;
return agp_alloc_memory(agpdev, type, pages << AGP_PAGE_SHIFT);
}
int drm_agp_free_memory(void *handle)
{
device_t agpdev;
agpdev = DRM_AGP_FIND_DEVICE();
if (!agpdev || !handle)
return 0;
agp_free_memory(agpdev, handle);
return 1;
}
int drm_agp_bind_memory(void *handle, off_t start)
{
#ifndef DRM_NO_AGP
device_t agpdev;
agpdev = DRM_AGP_FIND_DEVICE();
if (!agpdev || !handle)
return EINVAL;
return agp_bind_memory(agpdev, handle, start * PAGE_SIZE);
#else
return 0;
#endif
}
int drm_agp_unbind_memory(void *handle)
{
#ifndef DRM_NO_AGP
device_t agpdev;
agpdev = DRM_AGP_FIND_DEVICE();
if (!agpdev || !handle)
return EINVAL;
return agp_unbind_memory(agpdev, handle);
#else
return 0;
#endif
}
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