diff options
Diffstat (limited to 'src/mesa/drivers/dri/r200/r200_ioctl.h')
| -rw-r--r-- | src/mesa/drivers/dri/r200/r200_ioctl.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r200/r200_ioctl.h b/src/mesa/drivers/dri/r200/r200_ioctl.h index 011288161b..1503df7075 100644 --- a/src/mesa/drivers/dri/r200/r200_ioctl.h +++ b/src/mesa/drivers/dri/r200/r200_ioctl.h @@ -169,6 +169,31 @@ do { \ } \ } while (0) +/* Command lengths. Note that any time you ensure ELTS_BUFSZ or VBUF_BUFSZ + * are available, you will also be adding an rmesa->state.max_state_size because + * r200EmitState is called from within r200EmitVbufPrim and r200FlushElts. + */ +#define AOS_BUFSZ(nr) ((3 + ((nr / 2) * 3) + ((nr & 1) * 2)) * sizeof(int)) +#define VERT_AOS_BUFSZ (5 * sizeof(int)) +#define ELTS_BUFSZ(nr) (12 + nr * 2) +#define VBUF_BUFSZ (3 * sizeof(int)) + +/* Ensure that a minimum amount of space is available in the command buffer. + * This is used to ensure atomicity of state updates with the rendering requests + * that rely on them. + * + * An alternative would be to implement a "soft lock" such that when the buffer + * wraps at an inopportune time, we grab the lock, flush the current buffer, + * and hang on to the lock until the critical section is finished and we flush + * the buffer again and unlock. + */ +static __inline void r200EnsureCmdBufSpace( r200ContextPtr rmesa, int bytes ) +{ + if (rmesa->store.cmd_used + bytes > R200_CMD_BUF_SZ) + r200FlushCmdBuf( rmesa, __FUNCTION__ ); + assert( bytes <= R200_CMD_BUF_SZ ); +} + /* Alloc space in the command buffer */ static __inline char *r200AllocCmdBuf( r200ContextPtr rmesa, |