diff options
Diffstat (limited to 'linux-core/drm_context.c')
| -rw-r--r-- | linux-core/drm_context.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/linux-core/drm_context.c b/linux-core/drm_context.c index e2b6170a8..4ac896ef5 100644 --- a/linux-core/drm_context.c +++ b/linux-core/drm_context.c @@ -41,9 +41,13 @@ void DRM(ctxbitmap_free)( drm_device_t *dev, int ctx_handle ) { if ( ctx_handle < 0 ) goto failed; + if ( !dev->ctx_bitmap ) goto failed; if ( ctx_handle < DRM_MAX_CTXBITMAP ) { + down(&dev->struct_sem); clear_bit( ctx_handle, dev->ctx_bitmap ); + dev->context_sareas[ctx_handle] = NULL; + up(&dev->struct_sem); return; } failed: @@ -56,12 +60,37 @@ int DRM(ctxbitmap_next)( drm_device_t *dev ) { int bit; + if(!dev->ctx_bitmap) return -1; + + down(&dev->struct_sem); bit = find_first_zero_bit( dev->ctx_bitmap, DRM_MAX_CTXBITMAP ); if ( bit < DRM_MAX_CTXBITMAP ) { set_bit( bit, dev->ctx_bitmap ); DRM_DEBUG( "drm_ctxbitmap_next bit : %d\n", bit ); + if((bit+1) > dev->max_context) { + dev->max_context = (bit+1); + if(dev->context_sareas) { + dev->context_sareas = DRM(realloc)( + dev->context_sareas, + (dev->max_context - 1) * + sizeof(*dev->context_sareas), + dev->max_context * + sizeof(*dev->context_sareas), + DRM_MEM_MAPS); + dev->context_sareas[bit] = NULL; + } else { + /* max_context == 1 at this point */ + dev->context_sareas = DRM(alloc)( + dev->max_context * + sizeof(*dev->context_sareas), + DRM_MEM_MAPS); + dev->context_sareas[bit] = NULL; + } + } + up(&dev->struct_sem); return bit; } + up(&dev->struct_sem); return -1; } @@ -70,12 +99,18 @@ int DRM(ctxbitmap_init)( drm_device_t *dev ) int i; int temp; + down(&dev->struct_sem); dev->ctx_bitmap = (unsigned long *) DRM(alloc)( PAGE_SIZE, DRM_MEM_CTXBITMAP ); if ( dev->ctx_bitmap == NULL ) { + up(&dev->struct_sem); return -ENOMEM; } memset( (void *)dev->ctx_bitmap, 0, PAGE_SIZE ); + dev->context_sareas = NULL; + dev->max_context = -1; + up(&dev->struct_sem); + for ( i = 0 ; i < DRM_RESERVED_CONTEXTS ; i++ ) { temp = DRM(ctxbitmap_next)( dev ); DRM_DEBUG( "drm_ctxbitmap_init : %d\n", temp ); @@ -86,9 +121,86 @@ int DRM(ctxbitmap_init)( drm_device_t *dev ) void DRM(ctxbitmap_cleanup)( drm_device_t *dev ) { + down(&dev->struct_sem); + if( dev->context_sareas ) DRM(free)( dev->context_sareas, + sizeof(*dev->context_sareas) * + dev->max_context, + DRM_MEM_MAPS ); DRM(free)( (void *)dev->ctx_bitmap, PAGE_SIZE, DRM_MEM_CTXBITMAP ); + up(&dev->struct_sem); +} + +/* ================================================================ + * Per Context SAREA Support + */ + +int DRM(getsareactx)(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_ctx_priv_map_t request; + drm_map_t *map; + + if (copy_from_user(&request, + (drm_ctx_priv_map_t *)arg, + sizeof(request))) + return -EFAULT; + + down(&dev->struct_sem); + if ((int)request.ctx_id >= dev->max_context) { + up(&dev->struct_sem); + return -EINVAL; + } + + map = dev->context_sareas[request.ctx_id]; + up(&dev->struct_sem); + + request.handle = map->handle; + if (copy_to_user((drm_ctx_priv_map_t *)arg, &request, sizeof(request))) + return -EFAULT; + return 0; } +int DRM(setsareactx)(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_ctx_priv_map_t request; + drm_map_t *map = NULL; + drm_map_list_t *r_list; + struct list_head *list; + + if (copy_from_user(&request, + (drm_ctx_priv_map_t *)arg, + sizeof(request))) + return -EFAULT; + + down(&dev->struct_sem); + list_for_each(list, &dev->maplist->head) { + r_list = (drm_map_list_t *)list; + if(r_list->map && + r_list->map->handle == request.handle) break; + } + if (list == &(dev->maplist->head)) { + up(&dev->struct_sem); + return -EINVAL; + } + map = r_list->map; + up(&dev->struct_sem); + + if (!map) return -EINVAL; + + down(&dev->struct_sem); + if ((int)request.ctx_id >= dev->max_context) { + up(&dev->struct_sem); + return -EINVAL; + } + dev->context_sareas[request.ctx_id] = map; + up(&dev->struct_sem); + return 0; +} /* ================================================================ * The actual DRM context handling routines |