From: Jakob Bornecrantz jakob@vmware.com
Signed-off-by: Jakob Bornecrantz jakob@vmware.com Reviewed-by: Thomas Hellstrom thellstrom@vmware.com --- drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c index 3ba9cac..881f67a 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c @@ -277,6 +277,16 @@ static int vmw_fifo_wait(struct vmw_private *dev_priv, return ret; }
+/** + * Reserve @bytes number of bytes in the fifo. + * + * This function will return NULL (error) on two conditions: + * If it timeouts waiting for fifo space, or if @bytes is larger than the + * available fifo space. + * + * Returns: + * Pointer to the fifo, or null on error (possible hardware hang). + */ void *vmw_fifo_reserve(struct vmw_private *dev_priv, uint32_t bytes) { struct vmw_fifo_state *fifo_state = &dev_priv->fifo;