renesas/drm.git - libdrm, cloned from git://anongit.freedesktop.org/mesa/drm

Age	Commit message (Expand)	Author
2005-04-16	Use /*- to begin license blocks in BSD code to reduce diffs against FreeBSD	Eric Anholt
2004-05-09	Add mach64 DRM module for BSD (untested, but compiles).	Eric Anholt

/*- * 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 * PRECISION INSIGHT 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: * Gareth Hughes <gareth@valinux.com> * Eric Anholt <anholt@FreeBSD.org> * */ /** @file drm_scatter.c * Allocation of memory for scatter-gather mappings by the graphics chip. * * The memory allocated here is then made into an aperture in the card * by drm_ati_pcigart_init(). */ #include "drmP.h" #define DEBUG_SCATTER 0 void drm_sg_cleanup(drm_sg_mem_t *entry) { free((void *)entry->handle, M_DRM); free(entry->busaddr, M_DRM); free(entry, M_DRM); } int drm_sg_alloc(struct drm_device * dev, drm_scatter_gather_t * request) { drm_sg_mem_t *entry; unsigned long pages; int i; if ( dev->sg ) return EINVAL; entry = malloc(sizeof(*entry), M_DRM, M_WAITOK | M_ZERO); if ( !entry ) return ENOMEM; pages = round_page(request->size) / PAGE_SIZE; DRM_DEBUG( "sg size=%ld pages=%ld\n", request->size, pages ); entry->pages = pages; entry->busaddr = malloc(pages * sizeof(*entry->busaddr), M_DRM, M_WAITOK | M_ZERO); if ( !entry->busaddr ) { drm_sg_cleanup(entry); return ENOMEM; } entry->handle = (long)malloc(pages << PAGE_SHIFT, M_DRM, M_WAITOK | M_ZERO); if (entry->handle == 0) { drm_sg_cleanup(entry); return ENOMEM; } for (i = 0; i < pages; i++) { entry->busaddr[i] = vtophys(entry->handle + i * PAGE_SIZE); } DRM_DEBUG( "sg alloc handle = %08lx\n", entry->handle ); entry->virtual = (void *)entry->handle; request->handle = entry->handle; DRM_LOCK(); if (dev->sg) { DRM_UNLOCK(); drm_sg_cleanup(entry); return EINVAL; } dev->sg = entry; DRM_UNLOCK(); return 0; } int drm_sg_alloc_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_scatter_gather_t *request = data; int ret; DRM_DEBUG( "%s\n", __FUNCTION__ ); ret = drm_sg_alloc(dev, request); return ret; } int drm_sg_free(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_scatter_gather_t *request = data; drm_sg_mem_t *entry; DRM_LOCK(); entry = dev->sg; dev->sg = NULL; DRM_UNLOCK(); if ( !entry || entry->handle != request->handle ) return EINVAL; DRM_DEBUG( "sg free virtual = 0x%lx\n", entry->handle ); drm_sg_cleanup(entry); return 0; }