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-rw-r--r--linux/drmP.h14
-rw-r--r--linux/drm_bufs.h178
2 files changed, 183 insertions, 9 deletions
diff --git a/linux/drmP.h b/linux/drmP.h
index 4d136bf5..fea3b285 100644
--- a/linux/drmP.h
+++ b/linux/drmP.h
@@ -101,11 +101,12 @@
#define DRIVER_USE_MTRR 0x4
#define DRIVER_PCI_DMA 0x8
#define DRIVER_SG 0x10
-#define DRIVER_HAVE_DMA 0x20
-#define DRIVER_HAVE_IRQ 0x40
-#define DRIVER_IRQ_SHARED 0x80
-#define DRIVER_IRQ_VBL 0x100
-#define DRIVER_DMA_QUEUE 0x200
+#define DRIVER_FB_DMA 0x20
+#define DRIVER_HAVE_DMA 0x40
+#define DRIVER_HAVE_IRQ 0x80
+#define DRIVER_IRQ_SHARED 0x100
+#define DRIVER_IRQ_VBL 0x200
+#define DRIVER_DMA_QUEUE 0x400
/*@}*/
@@ -419,7 +420,8 @@ typedef struct drm_device_dma {
unsigned long byte_count;
enum {
_DRM_DMA_USE_AGP = 0x01,
- _DRM_DMA_USE_SG = 0x02
+ _DRM_DMA_USE_SG = 0x02,
+ _DRM_DMA_USE_FB = 0x04
} flags;
} drm_device_dma_t;
diff --git a/linux/drm_bufs.h b/linux/drm_bufs.h
index 5058a1d3..03900d1b 100644
--- a/linux/drm_bufs.h
+++ b/linux/drm_bufs.h
@@ -993,6 +993,175 @@ int DRM(addbufs_sg)( struct inode *inode, struct file *filp,
return 0;
}
+
+int DRM(addbufs_fb)( 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;
+ drm_buf_t **temp_buflist;
+ drm_buf_desc_t __user *argp = (void __user *)arg;
+
+ if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) return -EINVAL;
+
+ if ( !dma ) return -EINVAL;
+
+ if ( copy_from_user( &request, argp,
+ 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: %lu\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 */
+ }
+
+ if (count < 0 || count > 4096) {
+ up( &dev->struct_sem );
+ atomic_dec( &dev->buf_alloc );
+ return -EINVAL;
+ }
+
+ 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);
+ buf->next = NULL;
+ buf->waiting = 0;
+ buf->pending = 0;
+ init_waitqueue_head( &buf->dma_wait );
+ buf->filp = NULL;
+
+ buf->dev_priv_size = dev->dev_priv_size;
+ buf->dev_private = DRM(alloc)( buf->dev_priv_size,
+ DRM_MEM_BUFS );
+ if(!buf->dev_private) {
+ /* Set count correctly so we free the proper amount. */
+ entry->buf_count = count;
+ DRM(cleanup_buf_error)(dev,entry);
+ up( &dev->struct_sem );
+ atomic_dec( &dev->buf_alloc );
+ return -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)(dev,entry);
+ up( &dev->struct_sem );
+ atomic_dec( &dev->buf_alloc );
+ return -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 );
+
+ up( &dev->struct_sem );
+
+ request.count = entry->buf_count;
+ request.size = size;
+
+ if ( copy_to_user( argp, &request, sizeof(request) ) )
+ return -EFAULT;
+
+ dma->flags = _DRM_DMA_USE_FB;
+
+ atomic_dec( &dev->buf_alloc );
+ return 0;
+}
+
+
+
/**
* Add buffers for DMA transfers (ioctl).
*
@@ -1028,8 +1197,10 @@ int DRM(addbufs)( struct inode *inode, struct file *filp,
#endif
if ( request.flags & _DRM_SG_BUFFER )
return DRM(addbufs_sg)( inode, filp, cmd, arg );
- else
- return DRM(addbufs_pci)( inode, filp, cmd, arg );
+ else if ( request.flags & _DRM_FB_BUFFER )
+ return DRM(addbufs_fb)( inode, filp, cmd, arg );
+ else
+ return DRM(addbufs_pci)( inode, filp, cmd, arg );
}
@@ -1273,7 +1444,8 @@ int DRM(mapbufs)( struct inode *inode, struct file *filp,
if ( request.count >= dma->buf_count ) {
if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) ||
- (drm_core_check_feature(dev, DRIVER_SG) && (dma->flags & _DRM_DMA_USE_SG))) {
+ (drm_core_check_feature(dev, DRIVER_SG) && (dma->flags & _DRM_DMA_USE_SG)) ||
+ (drm_core_check_feature(dev, DRIVER_FB_DMA) && (dma->flags & _DRM_DMA_USE_FB))) {
drm_map_t *map = dev->agp_buffer_map;
if ( !map ) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-30 21:57:43 +0000