diff options
Diffstat (limited to 'linux-core/drm_bufs.c')
| -rw-r--r-- | linux-core/drm_bufs.c | 182 |
1 files changed, 180 insertions, 2 deletions
diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c index b1111048..16af7bd5 100644 --- a/linux-core/drm_bufs.c +++ b/linux-core/drm_bufs.c @@ -37,6 +37,10 @@ #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 @@ -103,13 +107,16 @@ int DRM(addmap)( struct inode *inode, struct file *filp, switch ( map->type ) { case _DRM_REGISTERS: case _DRM_FRAME_BUFFER: -#ifndef __sparc__ +#if !defined(__sparc__) && !defined(__alpha__) if ( map->offset + map->size < map->offset || map->offset < virt_to_phys(high_memory) ) { DRM(free)( map, sizeof(*map), DRM_MEM_MAPS ); return -EINVAL; } #endif +#ifdef __alpha__ + map->offset += dev->hose->mem_space->start; +#endif #if __REALLY_HAVE_MTRR if ( map->type == _DRM_FRAME_BUFFER || (map->flags & _DRM_WRITE_COMBINING) ) { @@ -135,10 +142,21 @@ int DRM(addmap)( struct inode *inode, struct file *filp, break; #if __REALLY_HAVE_AGP case _DRM_AGP: +#ifdef __alpha__ + map->offset += dev->hose->mem_space->start; +#endif map->offset = 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 -EINVAL; + } + map->offset = map->offset + dev->sg->handle; + break; + default: DRM(free)( map, sizeof(*map), DRM_MEM_MAPS ); return -EINVAL; @@ -237,6 +255,7 @@ int DRM(rmmap)(struct inode *inode, struct file *filp, vfree(map->handle); break; case _DRM_AGP: + case _DRM_SCATTER_GATHER: break; } DRM(free)(map, sizeof(*map), DRM_MEM_MAPS); @@ -565,6 +584,159 @@ int DRM(addbufs_pci)( struct inode *inode, struct file *filp, } #endif /* __HAVE_PCI_DMA */ +#ifdef __HAVE_SG +int DRM(addbufs_sg)( struct inode *inode, struct file *filp, + unsigned int cmd, unsigned long arg ) +{ + drm_file_t *priv = filp->private_data; + drm_device_t *dev = priv->dev; + drm_device_dma_t *dma = dev->dma; + drm_buf_desc_t request; + 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; + + if ( !dma ) return -EINVAL; + + if ( copy_from_user( &request, (drm_buf_desc_t *)arg, + sizeof(request) ) ) + return -EFAULT; + + count = request.count; + order = DRM(order)( request.size ); + size = 1 << order; + + alignment = (request.flags & _DRM_PAGE_ALIGN) + ? PAGE_ALIGN(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 -EINVAL; + if ( dev->queue_count ) return -EBUSY; /* Not while in use */ + + spin_lock( &dev->count_lock ); + if ( dev->buf_use ) { + spin_unlock( &dev->count_lock ); + return -EBUSY; + } + atomic_inc( &dev->buf_alloc ); + spin_unlock( &dev->count_lock ); + + down( &dev->struct_sem ); + entry = &dma->bufs[order]; + if ( entry->buf_count ) { + up( &dev->struct_sem ); + atomic_dec( &dev->buf_alloc ); + return -ENOMEM; /* May only call once for each order */ + } + + entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist), + DRM_MEM_BUFS ); + if ( !entry->buflist ) { + up( &dev->struct_sem ); + atomic_dec( &dev->buf_alloc ); + return -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->waiting = 0; + buf->pending = 0; + init_waitqueue_head( &buf->dma_wait ); + buf->pid = 0; + + buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T); + buf->dev_private = DRM(alloc)( sizeof(DRIVER_BUF_PRIV_T), + DRM_MEM_BUFS ); + memset( buf->dev_private, 0, buf->dev_priv_size ); + +#if __HAVE_DMA_HISTOGRAM + buf->time_queued = 0; + buf->time_dispatched = 0; + buf->time_completed = 0; + buf->time_freed = 0; +#endif + 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 ); + + dma->buflist = DRM(realloc)( dma->buflist, + dma->buf_count * sizeof(*dma->buflist), + (dma->buf_count + entry->buf_count) + * sizeof(*dma->buflist), + DRM_MEM_BUFS ); + 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 ); + +#if __HAVE_DMA_FREELIST + DRM(freelist_create)( &entry->freelist, entry->buf_count ); + for ( i = 0 ; i < entry->buf_count ; i++ ) { + DRM(freelist_put)( dev, &entry->freelist, &entry->buflist[i] ); + } +#endif + up( &dev->struct_sem ); + + request.count = entry->buf_count; + request.size = size; + + if ( copy_to_user( (drm_buf_desc_t *)arg, &request, sizeof(request) ) ) + return -EFAULT; + + dma->flags = _DRM_DMA_USE_SG; + + atomic_dec( &dev->buf_alloc ); + return 0; +} +#endif /* __HAVE_SG */ + int DRM(addbufs)( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { @@ -579,6 +751,11 @@ int DRM(addbufs)( struct inode *inode, struct file *filp, return DRM(addbufs_agp)( inode, filp, cmd, arg ); else #endif +#if __HAVE_SG + if ( request.flags & _DRM_SG_BUFFER ) + return DRM(addbufs_sg)( inode, filp, cmd, arg ); + else +#endif #if __HAVE_PCI_DMA return DRM(addbufs_pci)( inode, filp, cmd, arg ); #else @@ -760,7 +937,8 @@ int DRM(mapbufs)( struct inode *inode, struct file *filp, return -EFAULT; if ( request.count >= dma->buf_count ) { - if ( __HAVE_AGP && (dma->flags & _DRM_DMA_USE_AGP) ) { + if ( (__HAVE_AGP && (dma->flags & _DRM_DMA_USE_AGP)) || + (__HAVE_SG && (dma->flags & _DRM_DMA_USE_SG)) ) { drm_map_t *map = DRIVER_AGP_BUFFERS_MAP( dev ); if ( !map ) { |