[965] Convert the driver to dri_bufmgr interface and enable TTM.

This is currently believed to work but be a significant performance loss.
Performance recovery should be soon to follow.

The dri_bo_fake_disable_backing_store() call was added to allow backing store
disable like bufmgr_fake.c did, which is a significant performance win (though
it's missing the no-fence-subdata part).

This commit is a squash merge of the 965-ttm branch, which had some history
I wanted to avoid pulling due to noisiness and brokenness at many points
for git-bisecting.

1 files changed, 149 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index 77fd9e386a..975c647e55 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -42,7 +42,10 @@
 #include "intel_tex.h"
 #include "intel_span.h"
 #include "intel_ioctl.h"
+#include "intel_regions.h"
+#include "intel_bufmgr_ttm.h"
 
+#include "i915_drm.h"
 #include "i830_dri.h"
 
 PUBLIC const char __driConfigOptions[] =
@@ -126,6 +129,107 @@ intelMapScreenRegions(__DRIscreenPrivate *sPriv)
    return GL_TRUE;
 }
 
+/** Driver-specific fence emit implementation for the fake memory manager. */
+static unsigned int
+intel_fence_emit(void *private)
+{
+   intelScreenPrivate *intelScreen = (intelScreenPrivate *)private;
+   unsigned int fence;
+
+   /* XXX: Need to emit a flush, if we haven't already (at least with the
+    * current batchbuffer implementation, we have).
+    */
+
+   fence = intelEmitIrqLocked(intelScreen);
+
+   return fence;
+}
+
+/** Driver-specific fence wait implementation for the fake memory manager. */
+static int
+intel_fence_wait(void *private, unsigned int cookie)
+{
+   intelScreenPrivate *intelScreen = (intelScreenPrivate *)private;
+
+   intelWaitIrq(intelScreen, cookie);
+
+   return 0;
+}
+
+static struct intel_region *
+intel_recreate_static(intelScreenPrivate *intelScreen,
+		      char *name, struct intel_region *region,
+		      intelRegion *region_desc,
+		      GLuint mem_type)
+{
+  if (region) {
+    intel_region_update_static(intelScreen, region, mem_type,
+			       region_desc->bo_handle, region_desc->offset,
+			       region_desc->map, intelScreen->cpp,
+			       region_desc->pitch / intelScreen->cpp,
+			       intelScreen->height, region_desc->tiled);
+  } else {
+    region = intel_region_create_static(intelScreen, name, mem_type,
+					region_desc->bo_handle,
+					region_desc->offset,
+					region_desc->map, intelScreen->cpp,
+					region_desc->pitch / intelScreen->cpp,
+					intelScreen->height,
+					region_desc->tiled);
+  }
+
+  assert(region->buffer != NULL);
+
+  return region;
+}
+    
+
+/* Create intel_region structs to describe the static front,back,depth
+ * buffers created by the xserver. 
+ *
+ * Although FBO's mean we now no longer use these as render targets in
+ * all circumstances, they won't go away until the back and depth
+ * buffers become private, and the front and rotated buffers will
+ * remain even then.
+ *
+ * Note that these don't allocate video memory, just describe
+ * allocations alread made by the X server.
+ */
+static void
+intel_recreate_static_regions(intelScreenPrivate *intelScreen)
+{
+   intelScreen->front_region =
+      intel_recreate_static(intelScreen, "front",
+			    intelScreen->front_region,
+			    &intelScreen->front,
+			    DRM_BO_FLAG_MEM_TT);
+
+   /* The rotated region is only used for old DDXes that didn't handle rotation
+    * on their own.
+    */
+   if (intelScreen->driScrnPriv->ddx_version.minor < 8) {
+      intelScreen->rotated_region =
+	 intel_recreate_static(intelScreen, "rotated",
+			       intelScreen->rotated_region,
+			       &intelScreen->rotated,
+			       DRM_BO_FLAG_MEM_TT);
+   }
+
+   intelScreen->back_region =
+      intel_recreate_static(intelScreen, "back",
+			    intelScreen->back_region,
+			    &intelScreen->back,
+			    DRM_BO_FLAG_MEM_TT);
+
+   /* Still assumes front.cpp == depth.cpp.  We can kill this when we move to
+    * private buffers.
+    */
+   intelScreen->depth_region =
+      intel_recreate_static(intelScreen, "depth",
+			    intelScreen->depth_region,
+			    &intelScreen->depth,
+			    DRM_BO_FLAG_MEM_TT);
+}
 
 void
 intelUnmapScreenRegions(intelScreenPrivate *intelScreen)
@@ -243,6 +347,16 @@ intelUpdateScreenFromSAREA(intelScreenPrivate *intelScreen,
    intelScreen->depth.size = sarea->depth_size;
    intelScreen->depth.tiled = sarea->depth_tiled;
 
+   if (intelScreen->driScrnPriv->ddx_version.minor >= 9) {
+      intelScreen->front.bo_handle = sarea->front_bo_handle;
+      intelScreen->back.bo_handle = sarea->back_bo_handle;
+      intelScreen->depth.bo_handle = sarea->depth_bo_handle;
+   } else {
+      intelScreen->front.bo_handle = -1;
+      intelScreen->back.bo_handle = -1;
+      intelScreen->depth.bo_handle = -1;
+   }
+
    intelScreen->tex.offset = sarea->tex_offset;
    intelScreen->logTextureGranularity = sarea->log_tex_granularity;
    intelScreen->tex.handle = sarea->tex_handle;
@@ -301,6 +415,7 @@ static GLboolean intelInitDriver(__DRIscreenPrivate *sPriv)
          (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 
    intelScreen->deviceID = gDRIPriv->deviceID;
+   intelScreen->maxBatchSize = 16 * 1024;
    intelScreen->mem = gDRIPriv->mem;
    intelScreen->cpp = gDRIPriv->cpp;
 
@@ -357,7 +472,40 @@ static GLboolean intelInitDriver(__DRIscreenPrivate *sPriv)
    }
 
    sPriv->extensions = intelExtensions;
-   
+
+   if (getenv("INTEL_NO_TTM") == NULL &&
+       intelScreen->driScrnPriv->ddx_version.minor >= 9 &&
+       intelScreen->drmMinor >= 11 &&
+       intelScreen->front.bo_handle != -1) {
+      intelScreen->bufmgr = intel_bufmgr_ttm_init(sPriv->fd,
+						  DRM_FENCE_TYPE_EXE,
+						  DRM_FENCE_TYPE_EXE |
+						  DRM_I915_FENCE_TYPE_RW,
+						  intelScreen->maxBatchSize);
+      if (intelScreen->bufmgr != NULL)
+	 intelScreen->ttm = GL_TRUE;
+   }
+   /* Otherwise, use the classic buffer manager. */
+   if (intelScreen->bufmgr == NULL) {
+      if (intelScreen->tex.size == 0) {
+	 fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
+		 __func__, __LINE__);
+	 return GL_FALSE;
+      }
+      fprintf(stderr, "[%s:%u] Failed to init TTM buffer manager, falling back"
+	      " to classic.\n", __func__, __LINE__);
+      intelScreen->bufmgr = dri_bufmgr_fake_init(intelScreen->tex.offset,
+						 intelScreen->tex.map,
+						 intelScreen->tex.size,
+						 intel_fence_emit,
+						 intel_fence_wait,
+						 intelScreen);
+   }
+
+   intel_recreate_static_regions(intelScreen);
+
+   intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
+
    return GL_TRUE;
 }