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/* $NetBSD: drm_memory.c,v 1.14 2008/06/29 12:49:08 jmcneill Exp $ */
/* drm_memory.h -- Memory management wrappers for DRM -*- linux-c -*-
* Created: Thu Feb 4 14:00:34 1999 by faith@valinux.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.
*
* Authors:
* Rickard E. (Rik) Faith <faith@valinux.com>
* Gareth Hughes <gareth@valinux.com>
*
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: drm_memory.c,v 1.14 2008/06/29 12:49:08 jmcneill Exp $");
/*
__FBSDID("$FreeBSD: src/sys/dev/drm/drm_memory.c,v 1.2 2005/11/28 23:13:52 anholt Exp $");
*/
#include "drmP.h"
#ifdef DRM_NO_AGP
#define NAGP_I810 0
#else
#if defined(_KERNEL_OPT)
#include "agp_i810.h"
#else
#define NAGP_I810 1 /* XXX */
#endif
#if NAGP_I810 > 0 /* XXX hack to borrow agp's register mapping */
#include <dev/pci/agpvar.h>
#endif
#endif
#if !defined(_MODULE)
MALLOC_DEFINE(M_DRM, "drm", "DRM Data Structures");
#endif
void drm_mem_init(void)
{
/*
malloc_type_attach(M_DRM);
*/
}
void drm_mem_uninit(void)
{
}
void *drm_alloc(size_t size, int area)
{
return malloc(size, M_DRM, M_NOWAIT);
}
void *drm_calloc(size_t nmemb, size_t size, int area)
{
return malloc(size * nmemb, M_DRM, M_NOWAIT | M_ZERO);
}
void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
{
void *pt;
pt = malloc(size, M_DRM, M_NOWAIT);
if (pt == NULL)
return NULL;
if (oldpt && oldsize) {
memcpy(pt, oldpt, oldsize);
free(oldpt, M_DRM);
}
return pt;
}
void drm_free(void *pt, size_t size, int area)
{
free(pt, M_DRM);
}
void *drm_ioremap(drm_device_t *dev, drm_local_map_t *map)
{
int i, reg, reason;
for(i = 0; i<DRM_MAX_PCI_RESOURCE; i++) {
reg = PCI_MAPREG_START + i*4;
if ((dev->pci_map_data[i].maptype == PCI_MAPREG_TYPE_MEM ||
dev->pci_map_data[i].maptype ==
(PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT)) &&
dev->pci_map_data[i].base == map->offset &&
dev->pci_map_data[i].size >= map->size)
{
map->bst = dev->pa.pa_memt;
map->cnt = &(dev->pci_map_data[i].mapped);
map->mapsize = dev->pci_map_data[i].size;
dev->pci_map_data[i].mapped++;
if (dev->pci_map_data[i].mapped > 1)
{
map->bsh = dev->pci_map_data[i].bsh;
return dev->pci_map_data[i].vaddr;
}
if ((reason = bus_space_map(map->bst, map->offset,
dev->pci_map_data[i].size,
dev->pci_map_data[i].flags, &map->bsh)))
{
dev->pci_map_data[i].mapped--;
#if NAGP_I810 > 0 /* XXX horrible kludge: agp might have mapped it */
if (agp_i810_borrow(map->offset, &map->bsh))
return bus_space_vaddr(map->bst, map->bsh);
#endif
DRM_DEBUG("ioremap: failed to map (%d)\n",
reason);
return NULL;
}
dev->pci_map_data[i].bsh = map->bsh;
dev->pci_map_data[i].vaddr =
bus_space_vaddr(map->bst, map->bsh);
DRM_DEBUG("ioremap mem found: %p\n",
dev->pci_map_data[i].vaddr);
return dev->pci_map_data[i].vaddr;
}
}
/* failed to find a valid mapping; all hope isn't lost though */
for(i = 0; i<DRM_MAX_PCI_RESOURCE; i++) {
if (dev->agp_map_data[i].mapped > 0 &&
dev->agp_map_data[i].base == map->offset &&
dev->agp_map_data[i].size >= map->size) {
map->bst = dev->pa.pa_memt;
map->cnt = &(dev->agp_map_data[i].mapped);
map->mapsize = dev->agp_map_data[i].size;
dev->agp_map_data[i].mapped++;
map->bsh = dev->agp_map_data[i].bsh;
return dev->agp_map_data[i].vaddr;
}
if (dev->agp_map_data[i].mapped == 0) {
int rv;
map->bst = dev->pa.pa_memt;
dev->agp_map_data[i].mapped++;
dev->agp_map_data[i].size = map->size;
dev->agp_map_data[i].flags = BUS_SPACE_MAP_LINEAR;
dev->agp_map_data[i].maptype = PCI_MAPREG_TYPE_MEM;
map->cnt = &(dev->agp_map_data[i].mapped);
map->mapsize = dev->agp_map_data[i].size;
rv = bus_space_map(map->bst, map->offset,
dev->agp_map_data[i].size,
dev->agp_map_data[i].flags, &map->bsh);
if (rv) {
dev->agp_map_data[i].mapped--;
DRM_DEBUG("ioremap: failed to map (%d)\n", rv);
return NULL;
}
dev->agp_map_data[i].bsh = map->bsh;
dev->agp_map_data[i].vaddr =
bus_space_vaddr(map->bst, map->bsh);
DRM_DEBUG("ioremap agp mem found: %p\n",
dev->agp_map_data[i].vaddr);
return dev->agp_map_data[i].vaddr;
}
}
/* now we can give up... */
DRM_DEBUG("drm_ioremap failed: offset=%lx size=%lu\n",
map->offset, map->size);
return NULL;
}
void drm_ioremapfree(drm_local_map_t *map)
{
if (map->cnt == NULL) {
DRM_INFO("drm_ioremapfree called for unknown map\n");
return;
}
if (*(map->cnt) > 0) {
(*(map->cnt))--;
if(*(map->cnt) == 0)
bus_space_unmap(map->bst, map->bsh, map->mapsize);
}
}
int
drm_mtrr_add(unsigned long offset, size_t size, int flags)
{
#ifndef DRM_NO_MTRR
struct mtrr mtrrmap;
int one = 1;
DRM_DEBUG("offset=%lx size=%ld\n", (long)offset, (long)size);
mtrrmap.base = offset;
mtrrmap.len = size;
mtrrmap.type = flags;
mtrrmap.flags = MTRR_VALID;
return mtrr_set(&mtrrmap, &one, NULL, MTRR_GETSET_KERNEL);
#else
return 0;
#endif
}
int
drm_mtrr_del(int __unused handle, unsigned long offset, size_t size, int flags)
{
#ifndef DRM_NO_MTRR
struct mtrr mtrrmap;
int one = 1;
DRM_DEBUG("offset=%lx size=%ld\n", (long)offset, (long)size);
mtrrmap.base = offset;
mtrrmap.len = size;
mtrrmap.type = flags;
mtrrmap.flags = 0;
return mtrr_set(&mtrrmap, &one, NULL, MTRR_GETSET_KERNEL);
#else
return 0;
#endif
}
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