i965: ARB_occlusion_query support

Signed-off-by: Keith Packard <keithp@neko.keithp.com>

4 files changed, 55 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_wm_state.c b/src/mesa/drivers/dri/i965/brw_wm_state.c
index 4707a709e7..e41042d6d2 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_state.c
@@ -168,7 +168,7 @@ static void upload_wm_unit(struct brw_context *brw )
       wm.wm5.line_stipple = 1;
    }
 
-   if (INTEL_DEBUG & DEBUG_STATS)
+   if (INTEL_DEBUG & DEBUG_STATS || intel->stats_wm)
       wm.wm4.stats_enable = 1;
 
    brw->wm.state_gs_offset = brw_cache_data( &brw->cache[BRW_WM_UNIT], &wm );
diff --git a/src/mesa/drivers/dri/i965/intel_context.c b/src/mesa/drivers/dri/i965/intel_context.c
index 5e97e4d609..9acafe5310 100644
--- a/src/mesa/drivers/dri/i965/intel_context.c
+++ b/src/mesa/drivers/dri/i965/intel_context.c
@@ -70,6 +70,7 @@ int INTEL_DEBUG = (0);
 #define need_GL_ARB_vertex_buffer_object
 #define need_GL_ARB_vertex_program
 #define need_GL_ARB_window_pos
+#define need_GL_ARB_occlusion_query
 #define need_GL_EXT_blend_color
 #define need_GL_EXT_blend_equation_separate
 #define need_GL_EXT_blend_func_separate
@@ -157,6 +158,7 @@ const struct dri_extension card_extensions[] =
     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions },
     { "GL_ARB_window_pos",                 GL_ARB_window_pos_functions },
+    { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions},
     { "GL_EXT_blend_color",                GL_EXT_blend_color_functions },
     { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
     { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
@@ -241,6 +243,36 @@ void intelFinish( GLcontext *ctx )
    bmFinishFence(intel, bmLockAndFence(intel));
 }
 
+static void
+intelBeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
+{
+	struct intel_context *intel = intel_context( ctx );
+	GLuint64EXT tmp = 0;	
+	drmI830MMIO io = {
+		.read_write = MMIO_WRITE,
+		.reg = MMIO_REGS_PS_DEPTH_COUNT,
+		.data = &tmp 
+	};
+	intel->stats_wm = GL_TRUE;
+	intelFinish(&intel->ctx);
+	drmCommandWrite(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
+}
+
+static void
+intelEndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
+{
+	struct intel_context *intel = intel_context( ctx );
+	drmI830MMIO io = {
+		.read_write = MMIO_READ,
+		.reg = MMIO_REGS_PS_DEPTH_COUNT,
+		.data = &q->Result
+	};
+	intelFinish(&intel->ctx);
+	drmCommandRead(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
+	q->Ready = GL_TRUE;
+	intel->stats_wm = GL_FALSE;
+}
+
 
 void intelInitDriverFunctions( struct dd_function_table *functions )
 {
@@ -250,6 +282,8 @@ void intelInitDriverFunctions( struct dd_function_table *functions )
    functions->Finish = intelFinish;
    functions->GetString = intelGetString;
    functions->UpdateState = intelInvalidateState;
+   functions->BeginQuery = intelBeginQuery;
+   functions->EndQuery = intelEndQuery;
 
    /* CopyPixels can be accelerated even with the current memory
     * manager:
diff --git a/src/mesa/drivers/dri/i965/intel_context.h b/src/mesa/drivers/dri/i965/intel_context.h
index 8367a95710..fe7ee382a1 100644
--- a/src/mesa/drivers/dri/i965/intel_context.h
+++ b/src/mesa/drivers/dri/i965/intel_context.h
@@ -177,6 +177,7 @@ struct intel_context
    GLuint second_last_swap_fence;
    
    GLboolean aub_wrap;
+   GLboolean stats_wm;
 
    struct intel_batchbuffer *batch;
 
diff --git a/src/mesa/drivers/dri/i965/server/i830_common.h b/src/mesa/drivers/dri/i965/server/i830_common.h
index e3bbdc7907..f320378c2a 100644
--- a/src/mesa/drivers/dri/i965/server/i830_common.h
+++ b/src/mesa/drivers/dri/i965/server/i830_common.h
@@ -52,6 +52,7 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define DRM_I830_INIT_HEAP                0x0a
 #define DRM_I830_CMDBUFFER                0x0b
 #define DRM_I830_DESTROY_HEAP             0x0c
+#define DRM_I830_MMIO		       	  0x10
 
 typedef struct {
    enum {
@@ -199,5 +200,23 @@ typedef struct {
 	int region;
 } drmI830MemDestroyHeap;
 
+#define MMIO_READ  0
+#define MMIO_WRITE 1
+
+#define MMIO_REGS_IA_PRIMATIVES_COUNT           0
+#define MMIO_REGS_IA_VERTICES_COUNT             1
+#define MMIO_REGS_VS_INVOCATION_COUNT           2
+#define MMIO_REGS_GS_PRIMITIVES_COUNT           3
+#define MMIO_REGS_GS_INVOCATION_COUNT           4
+#define MMIO_REGS_CL_PRIMITIVES_COUNT           5
+#define MMIO_REGS_CL_INVOCATION_COUNT           6
+#define MMIO_REGS_PS_INVOCATION_COUNT           7
+#define MMIO_REGS_PS_DEPTH_COUNT                8
+
+typedef struct {
+        unsigned int read_write:1;
+        unsigned int reg:31;
+        void __user *data;
+} drmI830MMIO;
 
 #endif /* _I830_DRM_H_ */