236 lines
6.5 KiB
C
236 lines
6.5 KiB
C
/* $NetBSD: drm_memory.c,v 1.12 2008/05/19 21:05:37 jmcneill Exp $ */
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/* drm_memory.h -- Memory management wrappers for DRM -*- linux-c -*-
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* Created: Thu Feb 4 14:00:34 1999 by faith@valinux.com
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*/
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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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* Authors:
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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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: drm_memory.c,v 1.12 2008/05/19 21:05:37 jmcneill Exp $");
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/*
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__FBSDID("$FreeBSD: src/sys/dev/drm/drm_memory.c,v 1.2 2005/11/28 23:13:52 anholt Exp $");
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*/
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#include "drmP.h"
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#ifdef DRM_NO_AGP
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#define NAGP_I810 0
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#else
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#if defined(_KERNEL_OPT)
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#include "agp_i810.h"
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#else
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#define NAGP_I810 1 /* XXX */
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#endif
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#if NAGP_I810 > 0 /* XXX hack to borrow agp's register mapping */
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#include <dev/pci/agpvar.h>
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#endif
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#endif
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#if !defined(_MODULE)
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MALLOC_DEFINE(M_DRM, "drm", "DRM Data Structures");
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#endif
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void drm_mem_init(void)
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{
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/*
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malloc_type_attach(M_DRM);
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*/
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}
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void drm_mem_uninit(void)
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{
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}
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void *drm_alloc(size_t size, int area)
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{
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return malloc(size, M_DRM, M_NOWAIT);
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}
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void *drm_calloc(size_t nmemb, size_t size, int area)
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{
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return malloc(size * nmemb, M_DRM, M_NOWAIT | M_ZERO);
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}
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void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
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{
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void *pt;
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pt = malloc(size, M_DRM, M_NOWAIT);
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if (pt == NULL)
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return NULL;
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if (oldpt && oldsize) {
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memcpy(pt, oldpt, oldsize);
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free(oldpt, M_DRM);
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}
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return pt;
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}
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void drm_free(void *pt, size_t size, int area)
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{
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free(pt, M_DRM);
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}
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void *drm_ioremap(drm_device_t *dev, drm_local_map_t *map)
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{
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int i, reg, reason;
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for(i = 0; i<DRM_MAX_PCI_RESOURCE; i++) {
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reg = PCI_MAPREG_START + i*4;
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if ((dev->pci_map_data[i].maptype == PCI_MAPREG_TYPE_MEM ||
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dev->pci_map_data[i].maptype ==
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(PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT)) &&
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dev->pci_map_data[i].base == map->offset &&
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dev->pci_map_data[i].size >= map->size)
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{
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map->bst = dev->pa.pa_memt;
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map->cnt = &(dev->pci_map_data[i].mapped);
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map->mapsize = dev->pci_map_data[i].size;
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dev->pci_map_data[i].mapped++;
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if (dev->pci_map_data[i].mapped > 1)
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{
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map->bsh = dev->pci_map_data[i].bsh;
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return dev->pci_map_data[i].vaddr;
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}
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if ((reason = bus_space_map(map->bst, map->offset,
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dev->pci_map_data[i].size,
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dev->pci_map_data[i].flags, &map->bsh)))
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{
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dev->pci_map_data[i].mapped--;
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#if NAGP_I810 > 0 /* XXX horrible kludge: agp might have mapped it */
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if (agp_i810_borrow(map->offset, &map->bsh))
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return bus_space_vaddr(map->bst, map->bsh);
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#endif
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DRM_DEBUG("ioremap: failed to map (%d)\n",
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reason);
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return NULL;
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}
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dev->pci_map_data[i].bsh = map->bsh;
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dev->pci_map_data[i].vaddr =
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bus_space_vaddr(map->bst, map->bsh);
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DRM_DEBUG("ioremap mem found: %p\n",
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dev->pci_map_data[i].vaddr);
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return dev->pci_map_data[i].vaddr;
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}
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}
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/* failed to find a valid mapping; all hope isn't lost though */
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for(i = 0; i<DRM_MAX_PCI_RESOURCE; i++) {
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if (dev->agp_map_data[i].mapped > 0 &&
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dev->agp_map_data[i].base == map->offset &&
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dev->agp_map_data[i].size >= map->size) {
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map->bst = dev->pa.pa_memt;
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map->cnt = &(dev->agp_map_data[i].mapped);
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map->mapsize = dev->agp_map_data[i].size;
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dev->agp_map_data[i].mapped++;
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map->bsh = dev->agp_map_data[i].bsh;
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return dev->agp_map_data[i].vaddr;
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}
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if (dev->agp_map_data[i].mapped == 0) {
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int rv;
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map->bst = dev->pa.pa_memt;
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dev->agp_map_data[i].mapped++;
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dev->agp_map_data[i].size = map->size;
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dev->agp_map_data[i].flags = BUS_SPACE_MAP_LINEAR;
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dev->agp_map_data[i].maptype = PCI_MAPREG_TYPE_MEM;
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map->cnt = &(dev->agp_map_data[i].mapped);
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map->mapsize = dev->agp_map_data[i].size;
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rv = bus_space_map(map->bst, map->offset,
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dev->agp_map_data[i].size,
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dev->agp_map_data[i].flags, &map->bsh);
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if (rv) {
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dev->agp_map_data[i].mapped--;
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DRM_DEBUG("ioremap: failed to map (%d)\n", rv);
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return NULL;
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}
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dev->agp_map_data[i].bsh = map->bsh;
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dev->agp_map_data[i].vaddr =
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bus_space_vaddr(map->bst, map->bsh);
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DRM_DEBUG("ioremap agp mem found: %p\n",
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dev->agp_map_data[i].vaddr);
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return dev->agp_map_data[i].vaddr;
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}
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}
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/* now we can give up... */
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DRM_DEBUG("drm_ioremap failed: offset=%lx size=%lu\n",
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map->offset, map->size);
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return NULL;
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}
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void drm_ioremapfree(drm_local_map_t *map)
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{
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if (map->cnt == NULL) {
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DRM_INFO("drm_ioremapfree called for unknown map\n");
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return;
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}
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if (*(map->cnt) > 0) {
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(*(map->cnt))--;
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if(*(map->cnt) == 0)
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bus_space_unmap(map->bst, map->bsh, map->mapsize);
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}
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}
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int
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drm_mtrr_add(unsigned long offset, size_t size, int flags)
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{
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#ifndef DRM_NO_MTRR
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struct mtrr mtrrmap;
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int one = 1;
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DRM_DEBUG("offset=%lx size=%ld\n", (long)offset, (long)size);
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mtrrmap.base = offset;
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mtrrmap.len = size;
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mtrrmap.type = flags;
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mtrrmap.flags = MTRR_VALID;
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return mtrr_set(&mtrrmap, &one, NULL, MTRR_GETSET_KERNEL);
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#else
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return 0;
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#endif
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}
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int
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drm_mtrr_del(int __unused handle, unsigned long offset, size_t size, int flags)
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{
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#ifndef DRM_NO_MTRR
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struct mtrr mtrrmap;
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int one = 1;
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DRM_DEBUG("offset=%lx size=%ld\n", (long)offset, (long)size);
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mtrrmap.base = offset;
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mtrrmap.len = size;
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mtrrmap.type = flags;
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mtrrmap.flags = 0;
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return mtrr_set(&mtrrmap, &one, NULL, MTRR_GETSET_KERNEL);
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#else
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return 0;
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#endif
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}
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