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

Age	Commit message (Expand)	Author
2007-12-04	radeon_ms: radeon modesetting first commit.	Jerome Glisse

/* drm_scatter.h -- IOCTLs to manage scatter/gather memory -*- linux-c -*- * Created: Mon Dec 18 23:20:54 2000 by gareth@valinux.com * * 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> * */ #include "drmP.h" #define DEBUG_SCATTER 0 #if __REALLY_HAVE_SG void DRM(sg_cleanup)( drm_sg_mem_t *entry ) { free( entry->virtual, DRM(M_DRM) ); DRM(free)( entry->busaddr, entry->pages * sizeof(*entry->busaddr), DRM_MEM_PAGES ); DRM(free)( entry, sizeof(*entry), DRM_MEM_SGLISTS ); } int DRM(sg_alloc)( DRM_IOCTL_ARGS ) { DRM_DEVICE; drm_scatter_gather_t request; drm_sg_mem_t *entry; unsigned long pages; DRM_DEBUG( "%s\n", __FUNCTION__ ); if ( dev->sg ) return EINVAL; DRM_COPY_FROM_USER_IOCTL(request, (drm_scatter_gather_t *)data, sizeof(request) ); entry = DRM(alloc)( sizeof(*entry), DRM_MEM_SGLISTS ); if ( !entry ) return ENOMEM; bzero( entry, sizeof(*entry) ); pages = round_page(request.size) / PAGE_SIZE; DRM_DEBUG( "sg size=%ld pages=%ld\n", request.size, pages ); entry->pages = pages; entry->busaddr = DRM(alloc)( pages * sizeof(*entry->busaddr), DRM_MEM_PAGES ); if ( !entry->busaddr ) { DRM(free)( entry, sizeof(*entry), DRM_MEM_SGLISTS ); return ENOMEM; } bzero( (void *)entry->busaddr, pages * sizeof(*entry->busaddr) ); entry->virtual = malloc( pages << PAGE_SHIFT, DRM(M_DRM), M_WAITOK ); if ( !entry->virtual ) { DRM(free)( entry->busaddr, entry->pages * sizeof(*entry->busaddr), DRM_MEM_PAGES ); DRM(free)( entry, sizeof(*entry), DRM_MEM_SGLISTS ); return ENOMEM; } bzero( entry->virtual, pages << PAGE_SHIFT ); entry->handle = (unsigned long)entry->virtual; DRM_DEBUG( "sg alloc handle = %08lx\n", entry->handle ); DRM_DEBUG( "sg alloc virtual = %p\n", entry->virtual ); request.handle = entry->handle; DRM_COPY_TO_USER_IOCTL( (drm_scatter_gather_t *)data, request, sizeof(request) ); dev->sg = entry; return 0; DRM(sg_cleanup)( entry ); return ENOMEM; } int DRM(sg_free)( DRM_IOCTL_ARGS ) { DRM_DEVICE; drm_scatter_gather_t request; drm_sg_mem_t *entry; DRM_COPY_FROM_USER_IOCTL( request, (drm_scatter_gather_t *)data, sizeof(request) ); entry = dev->sg; dev->sg = NULL; if ( !entry || entry->handle != request.handle ) return EINVAL; DRM_DEBUG( "sg free virtual = %p\n", entry->virtual ); DRM(sg_cleanup)( entry ); return 0; } #else /* __REALLY_HAVE_SG */ int DRM(sg_alloc)( DRM_IOCTL_ARGS ) { return DRM_ERR(EINVAL); } int DRM(sg_free)( DRM_IOCTL_ARGS ) { return DRM_ERR(EINVAL); } #endif