diff options
Diffstat (limited to 'sys/dev/drm/drm_bufs.h')
| -rw-r--r-- | sys/dev/drm/drm_bufs.h | 1028 |
1 files changed, 1028 insertions, 0 deletions
diff --git a/sys/dev/drm/drm_bufs.h b/sys/dev/drm/drm_bufs.h new file mode 100644 index 0000000..9fab73f --- /dev/null +++ b/sys/dev/drm/drm_bufs.h @@ -0,0 +1,1028 @@ +/* drm_bufs.h -- Generic buffer template -*- linux-c -*- + * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com + * + * Copyright 1999, 2000 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> + * $FreeBSD$ + */ + +#include "dev/drm/drmP.h" + +#ifndef __HAVE_PCI_DMA +#define __HAVE_PCI_DMA 0 +#endif + +#ifndef __HAVE_SG +#define __HAVE_SG 0 +#endif + +#ifndef DRIVER_BUF_PRIV_T +#define DRIVER_BUF_PRIV_T u32 +#endif +#ifndef DRIVER_AGP_BUFFERS_MAP +#if __HAVE_AGP && __HAVE_DMA +#error "You must define DRIVER_AGP_BUFFERS_MAP()" +#else +#define DRIVER_AGP_BUFFERS_MAP( dev ) NULL +#endif +#endif + +/* + * Compute order. Can be made faster. + */ +int DRM(order)( unsigned long size ) +{ + int order; + unsigned long tmp; + + for ( order = 0, tmp = size ; tmp >>= 1 ; ++order ); + + if ( size & ~(1 << order) ) + ++order; + + return order; +} + +int DRM(addmap)( DRM_IOCTL_ARGS ) +{ + DRM_DEVICE; + drm_map_t request; + drm_local_map_t *map; + drm_map_list_entry_t *list; + + if (!(dev->flags & (FREAD|FWRITE))) + return DRM_ERR(EACCES); /* Require read/write */ + + DRM_COPY_FROM_USER_IOCTL( request, (drm_map_t *)data, sizeof(drm_map_t) ); + + map = (drm_local_map_t *) DRM(alloc)( sizeof(*map), DRM_MEM_MAPS ); + if ( !map ) + return DRM_ERR(ENOMEM); + + map->offset = request.offset; + map->size = request.size; + map->type = request.type; + map->flags = request.flags; + map->mtrr = -1; + map->handle = 0; + + /* Only allow shared memory to be removable since we only keep enough + * book keeping information about shared memory to allow for removal + * when processes fork. + */ + if ( (map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM ) { + DRM(free)( map, sizeof(*map), DRM_MEM_MAPS ); + return DRM_ERR(EINVAL); + } + DRM_DEBUG( "offset = 0x%08lx, size = 0x%08lx, type = %d\n", + map->offset, map->size, map->type ); + if ( (map->offset & PAGE_MASK) || (map->size & PAGE_MASK) ) { + DRM(free)( map, sizeof(*map), DRM_MEM_MAPS ); + return DRM_ERR(EINVAL); + } + + switch ( map->type ) { + case _DRM_REGISTERS: + case _DRM_FRAME_BUFFER: + if ( map->offset + map->size < map->offset ) { + DRM(free)( map, sizeof(*map), DRM_MEM_MAPS ); + return DRM_ERR(EINVAL); + } +#if __REALLY_HAVE_MTRR + if ( map->type == _DRM_FRAME_BUFFER || + (map->flags & _DRM_WRITE_COMBINING) ) { +#ifdef __FreeBSD__ + int retcode = 0, act; + struct mem_range_desc mrdesc; + mrdesc.mr_base = map->offset; + mrdesc.mr_len = map->size; + mrdesc.mr_flags = MDF_WRITECOMBINE; + act = MEMRANGE_SET_UPDATE; + bcopy(DRIVER_NAME, &mrdesc.mr_owner, strlen(DRIVER_NAME)); + retcode = mem_range_attr_set(&mrdesc, &act); + map->mtrr=1; +#elif defined __NetBSD__ + struct mtrr mtrrmap; + int one = 1; + mtrrmap.base = map->offset; + mtrrmap.len = map->size; + mtrrmap.type = MTRR_TYPE_WC; + mtrrmap.flags = MTRR_VALID; + map->mtrr = mtrr_set( &mtrrmap, &one, p, MTRR_GETSET_KERNEL ); +#endif + } +#endif /* __REALLY_HAVE_MTRR */ + DRM_IOREMAP(map); + break; + + case _DRM_SHM: + map->handle = (void *)DRM(alloc)(map->size, DRM_MEM_SAREA); + DRM_DEBUG( "%ld %d %p\n", + map->size, DRM(order)( map->size ), map->handle ); + if ( !map->handle ) { + DRM(free)( map, sizeof(*map), DRM_MEM_MAPS ); + return DRM_ERR(ENOMEM); + } + map->offset = (unsigned long)map->handle; + if ( map->flags & _DRM_CONTAINS_LOCK ) { + dev->lock.hw_lock = map->handle; /* Pointer to lock */ + } + break; +#if __REALLY_HAVE_AGP + case _DRM_AGP: + map->offset += dev->agp->base; + map->mtrr = dev->agp->agp_mtrr; /* for getmap */ + break; +#endif + case _DRM_SCATTER_GATHER: + if (!dev->sg) { + DRM(free)(map, sizeof(*map), DRM_MEM_MAPS); + return DRM_ERR(EINVAL); + } + map->offset = map->offset + dev->sg->handle; + break; + + default: + DRM(free)( map, sizeof(*map), DRM_MEM_MAPS ); + return DRM_ERR(EINVAL); + } + + list = DRM(alloc)(sizeof(*list), DRM_MEM_MAPS); + if(!list) { + DRM(free)(map, sizeof(*map), DRM_MEM_MAPS); + return DRM_ERR(EINVAL); + } + memset(list, 0, sizeof(*list)); + list->map = map; + + DRM_LOCK; + TAILQ_INSERT_TAIL(dev->maplist, list, link); + DRM_UNLOCK; + + request.offset = map->offset; + request.size = map->size; + request.type = map->type; + request.flags = map->flags; + request.mtrr = map->mtrr; + request.handle = map->handle; + + if ( request.type != _DRM_SHM ) { + request.handle = (void *)request.offset; + } + + DRM_COPY_TO_USER_IOCTL( (drm_map_t *)data, request, sizeof(drm_map_t) ); + + return 0; +} + + +/* Remove a map private from list and deallocate resources if the mapping + * isn't in use. + */ + +int DRM(rmmap)( DRM_IOCTL_ARGS ) +{ + DRM_DEVICE; + drm_map_list_entry_t *list; + drm_local_map_t *map; + drm_map_t request; + int found_maps = 0; + + DRM_COPY_FROM_USER_IOCTL( request, (drm_map_t *)data, sizeof(request) ); + + DRM_LOCK; + TAILQ_FOREACH(list, dev->maplist, link) { + map = list->map; + if(map->handle == request.handle && + map->flags & _DRM_REMOVABLE) break; + } + + /* List has wrapped around to the head pointer, or its empty we didn't + * find anything. + */ + if(list == NULL) { + DRM_UNLOCK; + return DRM_ERR(EINVAL); + } + TAILQ_REMOVE(dev->maplist, list, link); + DRM(free)(list, sizeof(*list), DRM_MEM_MAPS); + + + if(!found_maps) { + switch (map->type) { + case _DRM_REGISTERS: + case _DRM_FRAME_BUFFER: +#if __REALLY_HAVE_MTRR + if (map->mtrr >= 0) { + int retcode; +#ifdef __FreeBSD__ + int act; + struct mem_range_desc mrdesc; + mrdesc.mr_base = map->offset; + mrdesc.mr_len = map->size; + mrdesc.mr_flags = MDF_WRITECOMBINE; + act = MEMRANGE_SET_REMOVE; + bcopy(DRIVER_NAME, &mrdesc.mr_owner, strlen(DRIVER_NAME)); + retcode = mem_range_attr_set(&mrdesc, &act); +#elif defined __NetBSD__ + struct mtrr mtrrmap; + int one = 1; + mtrrmap.base = map->offset; + mtrrmap.len = map->size; + mtrrmap.type = 0; + mtrrmap.flags = 0; + mtrrmap.owner = p->p_pid; + retcode = mtrr_set( &mtrrmap, &one, p, MTRR_GETSET_KERNEL); + DRM_DEBUG("mtrr_del = %d\n", retcode); +#endif + } +#endif + DRM(ioremapfree)( map ); + break; + case _DRM_SHM: + DRM(free)( map->handle, map->size, DRM_MEM_SAREA ); + break; + case _DRM_AGP: + case _DRM_SCATTER_GATHER: + break; + } + DRM(free)(map, sizeof(*map), DRM_MEM_MAPS); + } + DRM_UNLOCK; + return 0; +} + +#if __HAVE_DMA + + +static void DRM(cleanup_buf_error)(drm_buf_entry_t *entry) +{ + int i; + + if (entry->seg_count) { + for (i = 0; i < entry->seg_count; i++) { + DRM(free)((void *)entry->seglist[i], + entry->buf_size, + DRM_MEM_DMA); + } + DRM(free)(entry->seglist, + entry->seg_count * + sizeof(*entry->seglist), + DRM_MEM_SEGS); + + entry->seg_count = 0; + } + + if(entry->buf_count) { + for(i = 0; i < entry->buf_count; i++) { + if(entry->buflist[i].dev_private) { + DRM(free)(entry->buflist[i].dev_private, + entry->buflist[i].dev_priv_size, + DRM_MEM_BUFS); + } + } + DRM(free)(entry->buflist, + entry->buf_count * + sizeof(*entry->buflist), + DRM_MEM_BUFS); + + entry->buf_count = 0; + } +} + +#if __REALLY_HAVE_AGP +static int DRM(addbufs_agp)(drm_device_t *dev, drm_buf_desc_t *request) +{ + drm_device_dma_t *dma = dev->dma; + drm_buf_entry_t *entry; + drm_buf_t *buf; + unsigned long offset; + unsigned long agp_offset; + int count; + int order; + int size; + int alignment; + int page_order; + int total; + int byte_count; + int i; + drm_buf_t **temp_buflist; + + count = request->count; + order = DRM(order)(request->size); + size = 1 << order; + + alignment = (request->flags & _DRM_PAGE_ALIGN) + ? round_page(size) : size; + page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; + total = PAGE_SIZE << page_order; + + byte_count = 0; + agp_offset = dev->agp->base + request->agp_start; + + DRM_DEBUG( "count: %d\n", count ); + DRM_DEBUG( "order: %d\n", order ); + DRM_DEBUG( "size: %d\n", size ); + DRM_DEBUG( "agp_offset: 0x%lx\n", agp_offset ); + DRM_DEBUG( "alignment: %d\n", alignment ); + DRM_DEBUG( "page_order: %d\n", page_order ); + DRM_DEBUG( "total: %d\n", total ); + + if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) + return DRM_ERR(EINVAL); + + DRM_LOCK; + entry = &dma->bufs[order]; + if ( entry->buf_count ) { + DRM_UNLOCK; + return DRM_ERR(ENOMEM); /* May only call once for each order */ + } + + entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist), + DRM_MEM_BUFS ); + if ( !entry->buflist ) { + DRM_UNLOCK; + return DRM_ERR(ENOMEM); + } + memset( entry->buflist, 0, count * sizeof(*entry->buflist) ); + + entry->buf_size = size; + entry->page_order = page_order; + + offset = 0; + + while ( entry->buf_count < count ) { + buf = &entry->buflist[entry->buf_count]; + buf->idx = dma->buf_count + entry->buf_count; + buf->total = alignment; + buf->order = order; + buf->used = 0; + + buf->offset = (dma->byte_count + offset); + buf->bus_address = agp_offset + offset; + buf->address = (void *)(agp_offset + offset); + buf->next = NULL; + buf->pending = 0; + buf->filp = NULL; + + buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T); + buf->dev_private = DRM(alloc)( sizeof(DRIVER_BUF_PRIV_T), + DRM_MEM_BUFS ); + if(!buf->dev_private) { + /* Set count correctly so we free the proper amount. */ + entry->buf_count = count; + DRM(cleanup_buf_error)(entry); + } + memset( buf->dev_private, 0, buf->dev_priv_size ); + + offset += alignment; + entry->buf_count++; + byte_count += PAGE_SIZE << page_order; + } + + DRM_DEBUG( "byte_count: %d\n", byte_count ); + + temp_buflist = DRM(realloc)( dma->buflist, + dma->buf_count * sizeof(*dma->buflist), + (dma->buf_count + entry->buf_count) + * sizeof(*dma->buflist), + DRM_MEM_BUFS ); + if(!temp_buflist) { + /* Free the entry because it isn't valid */ + DRM(cleanup_buf_error)(entry); + DRM_UNLOCK; + return DRM_ERR(ENOMEM); + } + dma->buflist = temp_buflist; + + for ( i = 0 ; i < entry->buf_count ; i++ ) { + dma->buflist[i + dma->buf_count] = &entry->buflist[i]; + } + + dma->buf_count += entry->buf_count; + dma->byte_count += byte_count; + + DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count ); + DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count ); + + DRM_UNLOCK; + + request->count = entry->buf_count; + request->size = size; + + dma->flags = _DRM_DMA_USE_AGP; + + return 0; +} +#endif /* __REALLY_HAVE_AGP */ + +#if __HAVE_PCI_DMA +static int DRM(addbufs_pci)(drm_device_t *dev, drm_buf_desc_t *request) +{ + drm_device_dma_t *dma = dev->dma; + int count; + int order; + int size; + int total; + int page_order; + drm_buf_entry_t *entry; + unsigned long page; + drm_buf_t *buf; + int alignment; + unsigned long offset; + int i; + int byte_count; + int page_count; + unsigned long *temp_pagelist; + drm_buf_t **temp_buflist; + + count = request->count; + order = DRM(order)(request->size); + size = 1 << order; + + DRM_DEBUG( "count=%d, size=%d (%d), order=%d\n", + request->count, request->size, size, order ); + + if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) + return DRM_ERR(EINVAL); + + alignment = (request->flags & _DRM_PAGE_ALIGN) + ? round_page(size) : size; + page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; + total = PAGE_SIZE << page_order; + + DRM_LOCK; + entry = &dma->bufs[order]; + if ( entry->buf_count ) { + DRM_UNLOCK; + return DRM_ERR(ENOMEM); /* May only call once for each order */ + } + + entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist), + DRM_MEM_BUFS ); + if ( !entry->buflist ) { + DRM_UNLOCK; + return DRM_ERR(ENOMEM); + } + memset( entry->buflist, 0, count * sizeof(*entry->buflist) ); + + entry->seglist = DRM(alloc)( count * sizeof(*entry->seglist), + DRM_MEM_SEGS ); + if ( !entry->seglist ) { + DRM(free)( entry->buflist, + count * sizeof(*entry->buflist), + DRM_MEM_BUFS ); + DRM_UNLOCK; + return DRM_ERR(ENOMEM); + } + memset( entry->seglist, 0, count * sizeof(*entry->seglist) ); + + temp_pagelist = DRM(realloc)( dma->pagelist, + dma->page_count * sizeof(*dma->pagelist), + (dma->page_count + (count << page_order)) + * sizeof(*dma->pagelist), + DRM_MEM_PAGES ); + if(!temp_pagelist) { + DRM(free)( entry->buflist, + count * sizeof(*entry->buflist), + DRM_MEM_BUFS ); + DRM(free)( entry->seglist, + count * sizeof(*entry->seglist), + DRM_MEM_SEGS ); + DRM_UNLOCK; + return DRM_ERR(ENOMEM); + } + + dma->pagelist = temp_pagelist; + DRM_DEBUG( "pagelist: %d entries\n", + dma->page_count + (count << page_order) ); + + entry->buf_size = size; + entry->page_order = page_order; + byte_count = 0; + page_count = 0; + + while ( entry->buf_count < count ) { + page = (unsigned long)DRM(alloc)( size, DRM_MEM_DMA ); + if ( !page ) break; + entry->seglist[entry->seg_count++] = page; + for ( i = 0 ; i < (1 << page_order) ; i++ ) { + DRM_DEBUG( "page %d @ 0x%08lx\n", + dma->page_count + page_count, + page + PAGE_SIZE * i ); + dma->pagelist[dma->page_count + page_count++] + = page + PAGE_SIZE * i; + } + for ( offset = 0 ; + offset + size <= total && entry->buf_count < count ; + offset += alignment, ++entry->buf_count ) { + buf = &entry->buflist[entry->buf_count]; + buf->idx = dma->buf_count + entry->buf_count; + buf->total = alignment; + buf->order = order; + buf->used = 0; + buf->offset = (dma->byte_count + byte_count + offset); + buf->address = (void *)(page + offset); + buf->next = NULL; + buf->pending = 0; + buf->filp = NULL; + DRM_DEBUG( "buffer %d @ %p\n", + entry->buf_count, buf->address ); + } + byte_count += PAGE_SIZE << page_order; + } + + temp_buflist = DRM(realloc)( dma->buflist, + dma->buf_count * sizeof(*dma->buflist), + (dma->buf_count + entry->buf_count) + * sizeof(*dma->buflist), + DRM_MEM_BUFS ); + if(!temp_buflist) { + /* Free the entry because it isn't valid */ + DRM(cleanup_buf_error)(entry); + DRM_UNLOCK; + return DRM_ERR(ENOMEM); + } + dma->buflist = temp_buflist; + + for ( i = 0 ; i < entry->buf_count ; i++ ) { + dma->buflist[i + dma->buf_count] = &entry->buflist[i]; + } + + dma->buf_count += entry->buf_count; + dma->seg_count += entry->seg_count; + dma->page_count += entry->seg_count << page_order; + dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); + + DRM_UNLOCK; + + request->count = entry->buf_count; + request->size = size; + + return 0; + +} +#endif /* __HAVE_PCI_DMA */ + +#if __REALLY_HAVE_SG +static int DRM(addbufs_sg)(drm_device_t *dev, drm_buf_desc_t *request) +{ + drm_device_dma_t *dma = dev->dma; + drm_buf_entry_t *entry; + drm_buf_t *buf; + unsigned long offset; + unsigned long agp_offset; + int count; + int order; + int size; + int alignment; + int page_order; + int total; + int byte_count; + int i; + drm_buf_t **temp_buflist; + + count = request->count; + order = DRM(order)(request->size); + size = 1 << order; + + alignment = (request->flags & _DRM_PAGE_ALIGN) + ? round_page(size) : size; + page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; + total = PAGE_SIZE << page_order; + + byte_count = 0; + agp_offset = request->agp_start; + + DRM_DEBUG( "count: %d\n", count ); + DRM_DEBUG( "order: %d\n", order ); + DRM_DEBUG( "size: %d\n", size ); + DRM_DEBUG( "agp_offset: %ld\n", agp_offset ); + DRM_DEBUG( "alignment: %d\n", alignment ); + DRM_DEBUG( "page_order: %d\n", page_order ); + DRM_DEBUG( "total: %d\n", total ); + + if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) + return DRM_ERR(EINVAL); + + DRM_LOCK; + entry = &dma->bufs[order]; + if ( entry->buf_count ) { + DRM_UNLOCK; + return DRM_ERR(ENOMEM); /* May only call once for each order */ + } + + entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist), + DRM_MEM_BUFS ); + if ( !entry->buflist ) { + DRM_UNLOCK; + return DRM_ERR(ENOMEM); + } + memset( entry->buflist, 0, count * sizeof(*entry->buflist) ); + + entry->buf_size = size; + entry->page_order = page_order; + + offset = 0; + + while ( entry->buf_count < count ) { + buf = &entry->buflist[entry->buf_count]; + buf->idx = dma->buf_count + entry->buf_count; + buf->total = alignment; + buf->order = order; + buf->used = 0; + + buf->offset = (dma->byte_count + offset); + buf->bus_address = agp_offset + offset; + buf->address = (void *)(agp_offset + offset + dev->sg->handle); + buf->next = NULL; + buf->pending = 0; + buf->filp = NULL; + + buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T); + buf->dev_private = DRM(alloc)( sizeof(DRIVER_BUF_PRIV_T), + DRM_MEM_BUFS ); + if(!buf->dev_private) { + /* Set count correctly so we free the proper amount. */ + entry->buf_count = count; + DRM(cleanup_buf_error)(entry); + DRM_UNLOCK; + return DRM_ERR(ENOMEM); + } + + memset( buf->dev_private, 0, buf->dev_priv_size ); + + DRM_DEBUG( "buffer %d @ %p\n", + entry->buf_count, buf->address ); + + offset += alignment; + entry->buf_count++; + byte_count += PAGE_SIZE << page_order; + } + + DRM_DEBUG( "byte_count: %d\n", byte_count ); + + temp_buflist = DRM(realloc)( dma->buflist, + dma->buf_count * sizeof(*dma->buflist), + (dma->buf_count + entry->buf_count) + * sizeof(*dma->buflist), + DRM_MEM_BUFS ); + if(!temp_buflist) { + /* Free the entry because it isn't valid */ + DRM(cleanup_buf_error)(entry); + DRM_UNLOCK; + return DRM_ERR(ENOMEM); + } + dma->buflist = temp_buflist; + + for ( i = 0 ; i < entry->buf_count ; i++ ) { + dma->buflist[i + dma->buf_count] = &entry->buflist[i]; + } + + dma->buf_count += entry->buf_count; + dma->byte_count += byte_count; + + DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count ); + DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count ); + + DRM_UNLOCK; + + request->count = entry->buf_count; + request->size = size; + + dma->flags = _DRM_DMA_USE_SG; + + return 0; +} +#endif /* __REALLY_HAVE_SG */ + +int DRM(addbufs)( DRM_IOCTL_ARGS ) +{ + DRM_DEVICE; + drm_buf_desc_t request; + int err; + + DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) ); + + if (dev->dma == NULL) + return DRM_ERR(EINVAL); + + if (request.count < 0 || request.count > 4096) + return DRM_ERR(EINVAL); + + DRM_SPINLOCK(&dev->count_lock); + if (dev->buf_use) { + DRM_SPINUNLOCK(&dev->count_lock); + return DRM_ERR(EBUSY); + } + /* dev->buf_alloc acts as a lock to prevent infobufs/mapbufs from + * trying to read from the dma->bufs while buffers are being allocated */ + dev->buf_alloc++; + DRM_SPINUNLOCK(&dev->count_lock); + + +#if __REALLY_HAVE_AGP + if ( request.flags & _DRM_AGP_BUFFER ) + err = DRM(addbufs_agp)(dev, &request); + else +#endif +#if __REALLY_HAVE_SG + if ( request.flags & _DRM_SG_BUFFER ) + err = DRM(addbufs_sg)(dev, &request); + else +#endif +#if __HAVE_PCI_DMA + err = DRM(addbufs_pci)(dev, &request); +#else + err = DRM_ERR(EINVAL); +#endif + + DRM_COPY_TO_USER_IOCTL((drm_buf_desc_t *)data, request, sizeof(request)); + + DRM_SPINLOCK(&dev->count_lock); + dev->buf_alloc--; + DRM_SPINUNLOCK(&dev->count_lock); + + return err; +} + +int DRM(infobufs)( DRM_IOCTL_ARGS ) +{ + DRM_DEVICE; + drm_device_dma_t *dma = dev->dma; + drm_buf_info_t request; + int i; + int count; + + if ( !dma ) return DRM_ERR(EINVAL); + + DRM_SPINLOCK( &dev->count_lock ); + if (dev->buf_alloc != 0) { + DRM_SPINUNLOCK( &dev->count_lock ); + return DRM_ERR(EBUSY); + } + ++dev->buf_use; /* Can't allocate more after this call */ + DRM_SPINUNLOCK( &dev->count_lock ); + + DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_info_t *)data, sizeof(request) ); + + for ( i = 0, count = 0 ; i < DRM_MAX_ORDER + 1 ; i++ ) { + if ( dma->bufs[i].buf_count ) ++count; + } + + DRM_DEBUG( "count = %d\n", count ); + + if ( request.count >= count ) { + for ( i = 0, count = 0 ; i < DRM_MAX_ORDER + 1 ; i++ ) { + if ( dma->bufs[i].buf_count ) { + drm_buf_desc_t from; + + from.count = dma->bufs[i].buf_count; + from.size = dma->bufs[i].buf_size; + from.low_mark = dma->bufs[i].freelist.low_mark; + from.high_mark = dma->bufs[i].freelist.high_mark; + + if (DRM_COPY_TO_USER(&request.list[count], &from, + sizeof(drm_buf_desc_t)) != 0) + return DRM_ERR(EFAULT); + + DRM_DEBUG( "%d %d %d %d %d\n", + i, + dma->bufs[i].buf_count, + dma->bufs[i].buf_size, + dma->bufs[i].freelist.low_mark, + dma->bufs[i].freelist.high_mark ); + ++count; + } + } + } + request.count = count; + + DRM_COPY_TO_USER_IOCTL( (drm_buf_info_t *)data, request, sizeof(request) ); + + return 0; +} + +int DRM(markbufs)( DRM_IOCTL_ARGS ) +{ + DRM_DEVICE; + drm_device_dma_t *dma = dev->dma; + drm_buf_desc_t request; + int order; + drm_buf_entry_t *entry; + + if ( !dma ) return DRM_ERR(EINVAL); + + DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) ); + + DRM_DEBUG( "%d, %d, %d\n", + request.size, request.low_mark, request.high_mark ); + order = DRM(order)( request.size ); + if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) + return DRM_ERR(EINVAL); + entry = &dma->bufs[order]; + + if ( request.low_mark < 0 || request.low_mark > entry->buf_count ) + return DRM_ERR(EINVAL); + if ( request.high_mark < 0 || request.high_mark > entry->buf_count ) + return DRM_ERR(EINVAL); + + entry->freelist.low_mark = request.low_mark; + entry->freelist.high_mark = request.high_mark; + + return 0; +} + +int DRM(freebufs)( DRM_IOCTL_ARGS ) +{ + DRM_DEVICE; + drm_device_dma_t *dma = dev->dma; + drm_buf_free_t request; + int i; + int idx; + drm_buf_t *buf; + + if ( !dma ) return DRM_ERR(EINVAL); + + DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_free_t *)data, sizeof(request) ); + + DRM_DEBUG( "%d\n", request.count ); + for ( i = 0 ; i < request.count ; i++ ) { + if ( DRM_COPY_FROM_USER( &idx, + &request.list[i], + sizeof(idx) ) ) + return DRM_ERR(EFAULT); + if ( idx < 0 || idx >= dma->buf_count ) { + DRM_ERROR( "Index %d (of %d max)\n", + idx, dma->buf_count - 1 ); + return DRM_ERR(EINVAL); + } + buf = dma->buflist[idx]; + if ( buf->filp != filp ) { + DRM_ERROR("Process %d freeing buffer not owned\n", + DRM_CURRENTPID); + return DRM_ERR(EINVAL); + } + DRM(free_buffer)( dev, buf ); + } + + return 0; +} + +int DRM(mapbufs)( DRM_IOCTL_ARGS ) +{ + DRM_DEVICE; + drm_device_dma_t *dma = dev->dma; + int retcode = 0; + const int zero = 0; + vm_offset_t virtual, address; +#ifdef __FreeBSD__ +#if __FreeBSD_version >= 500000 + struct vmspace *vms = p->td_proc->p_vmspace; +#else + struct vmspace *vms = p->p_vmspace; +#endif +#endif /* __FreeBSD__ */ +#ifdef __NetBSD__ + struct vnode *vn; + struct vmspace *vms = p->p_vmspace; +#endif /* __NetBSD__ */ + + drm_buf_map_t request; + int i; + + if ( !dma ) return DRM_ERR(EINVAL); + + DRM_SPINLOCK( &dev->count_lock ); + if (dev->buf_alloc != 0) { + DRM_SPINUNLOCK( &dev->count_lock ); + return DRM_ERR(EBUSY); + } + dev->buf_use++; /* Can't allocate more after this call */ + DRM_SPINUNLOCK( &dev->count_lock ); + + DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_map_t *)data, sizeof(request) ); + +#ifdef __NetBSD__ + if(!vfinddev(kdev, VCHR, &vn)) + return 0; /* FIXME: Shouldn't this be EINVAL or something? */ +#endif /* __NetBSD__ */ + + if ( request.count >= dma->buf_count ) { + if ( (__HAVE_AGP && (dma->flags & _DRM_DMA_USE_AGP)) || + (__HAVE_SG && (dma->flags & _DRM_DMA_USE_SG)) ) { + drm_local_map_t *map = DRIVER_AGP_BUFFERS_MAP( dev ); + + if ( !map ) { + retcode = EINVAL; + goto done; + } + +#ifdef __FreeBSD__ + virtual = round_page((vm_offset_t)vms->vm_daddr + MAXDSIZ); + retcode = vm_mmap(&vms->vm_map, + &virtual, + round_page(map->size), + PROT_READ|PROT_WRITE, VM_PROT_ALL, + MAP_SHARED, + SLIST_FIRST(&kdev->si_hlist), + (unsigned long)map->offset ); +#elif defined(__NetBSD__) + virtual = round_page((vaddr_t)vms->vm_daddr + MAXDSIZ); + retcode = uvm_mmap(&vms->vm_map, + (vaddr_t *)&virtual, + round_page(map->size), + UVM_PROT_READ | UVM_PROT_WRITE, + UVM_PROT_ALL, MAP_SHARED, + &vn->v_uobj, map->offset, + p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); +#endif /* __NetBSD__ */ + } else { +#ifdef __FreeBSD__ + virtual = round_page((vm_offset_t)vms->vm_daddr + MAXDSIZ); + retcode = vm_mmap(&vms->vm_map, + &virtual, + round_page(dma->byte_count), + PROT_READ|PROT_WRITE, VM_PROT_ALL, + MAP_SHARED, + SLIST_FIRST(&kdev->si_hlist), + 0); +#elif defined(__NetBSD__) + virtual = round_page((vaddr_t)vms->vm_daddr + MAXDSIZ); + retcode = uvm_mmap(&vms->vm_map, + (vaddr_t *)&virtual, + round_page(dma->byte_count), + UVM_PROT_READ | UVM_PROT_WRITE, + UVM_PROT_ALL, MAP_SHARED, + &vn->v_uobj, 0, + p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); +#endif /* __NetBSD__ */ + } + if (retcode) + goto done; + request.virtual = (void *)virtual; + + for ( i = 0 ; i < dma->buf_count ; i++ ) { + if ( DRM_COPY_TO_USER( &request.list[i].idx, + &dma->buflist[i]->idx, + sizeof(request.list[0].idx) ) ) { + retcode = EFAULT; + goto done; + } + if ( DRM_COPY_TO_USER( &request.list[i].total, + &dma->buflist[i]->total, + sizeof(request.list[0].total) ) ) { + retcode = EFAULT; + goto done; + } + if ( DRM_COPY_TO_USER( &request.list[i].used, + &zero, + sizeof(zero) ) ) { + retcode = EFAULT; + goto done; + } + address = virtual + dma->buflist[i]->offset; /* *** */ + if ( DRM_COPY_TO_USER( &request.list[i].address, + &address, + sizeof(address) ) ) { + retcode = EFAULT; + goto done; + } + } + } + done: + request.count = dma->buf_count; + + DRM_DEBUG( "%d buffers, retcode = %d\n", request.count, retcode ); + + DRM_COPY_TO_USER_IOCTL( (drm_buf_map_t *)data, request, sizeof(request) ); + + return DRM_ERR(retcode); +} + +#endif /* __HAVE_DMA */ + |
