Mesa (master): i915g: add some throttling

[Jakob Bornecrantz]

Module: Mesa
Branch: master
Commit: 55a3c352432d1c7b22e445d041f9cb1990ca28d5
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=55a3c352432d1c7b22e445d041f9cb1990ca28d5

Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Mon Feb 21 19:14:02 2011 +0100

i915g: add some throttling

Intel classic drivers switched to this, too, so it must be good.

Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

---

 src/gallium/winsys/i915/drm/i915_drm_batchbuffer.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/src/gallium/winsys/i915/drm/i915_drm_batchbuffer.c b/src/gallium/winsys/i915/drm/i915_drm_batchbuffer.c
index dec19d4..afeab5e 100644
--- a/src/gallium/winsys/i915/drm/i915_drm_batchbuffer.c
+++ b/src/gallium/winsys/i915/drm/i915_drm_batchbuffer.c
@@ -4,6 +4,7 @@
 
 #include "i915_drm.h"
 #include "i915/i915_debug.h"
+#include <xf86drm.h>
 
 #define BATCH_RESERVED 16
 
@@ -132,6 +133,12 @@ i915_drm_batchbuffer_reloc(struct i915_winsys_batchbuffer *ibatch,
    return ret;
 }
 
+static void 
+i915_drm_throttle(struct i915_drm_winsys *idws)
+{
+   drmIoctl(idws->fd, DRM_IOCTL_I915_GEM_THROTTLE, NULL);
+}
+
 static void
 i915_drm_batchbuffer_flush(struct i915_winsys_batchbuffer *ibatch,
                             struct pipe_fence_handle **fence)
@@ -155,6 +162,8 @@ i915_drm_batchbuffer_flush(struct i915_winsys_batchbuffer *ibatch,
    if (ret == 0 && i915_drm_winsys(ibatch->iws)->send_cmd)
       ret = drm_intel_bo_exec(batch->bo, used, NULL, 0, 0);
 
+   i915_drm_throttle(i915_drm_winsys(ibatch->iws));
+
    if (ret != 0 || i915_drm_winsys(ibatch->iws)->dump_cmd) {
       i915_dump_batchbuffer(ibatch);
       assert(ret == 0);