gallium: add QUERY_TIMESTAMP cap and get_timestamp screen function

src/gallium/drivers/i915/i915_screen.c

@@ -209,6 +209,7 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
    case PIPE_CAP_START_INSTANCE:
+   case PIPE_CAP_QUERY_TIMESTAMP:
       return 0;
 
    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -207,6 +207,7 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
       return 16;
    case PIPE_CAP_START_INSTANCE:
+   case PIPE_CAP_QUERY_TIMESTAMP:
       return 0;
    }
    /* should only get here on unhandled cases */

src/gallium/drivers/nv30/nv30_screen.c

@@ -116,6 +116,7 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
    case PIPE_CAP_START_INSTANCE:
+   case PIPE_CAP_QUERY_TIMESTAMP:
       return 0;
    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:

src/gallium/drivers/nv50/nv50_screen.c

@@ -172,6 +172,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
+   case PIPE_CAP_QUERY_TIMESTAMP:
       return 0;
    default:
       NOUVEAU_ERR("unknown PIPE_CAP %d\n", param);

src/gallium/drivers/nvc0/nvc0_screen.c

@@ -150,6 +150,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
+   case PIPE_CAP_QUERY_TIMESTAMP:
       return 0;
    default:
       NOUVEAU_ERR("unknown PIPE_CAP %d\n", param);

src/gallium/drivers/r300/r300_screen.c

@@ -148,6 +148,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
         case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
         case PIPE_CAP_COMPUTE:
         case PIPE_CAP_START_INSTANCE:
+        case PIPE_CAP_QUERY_TIMESTAMP:
             return 0;
 
         /* SWTCL-only features. */

src/gallium/drivers/r600/r600_pipe.c

@@ -412,6 +412,7 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 	case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 	case PIPE_CAP_USER_VERTEX_BUFFERS:
+	case PIPE_CAP_QUERY_TIMESTAMP:
 		return 0;
 
 	/* Stream output. */

src/gallium/drivers/softpipe/sp_screen.c

@@ -164,6 +164,7 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
    case PIPE_CAP_START_INSTANCE:
+   case PIPE_CAP_QUERY_TIMESTAMP:
       return 0;
    }
    /* should only get here on unhandled cases */

src/gallium/drivers/svga/svga_screen.c

@@ -254,6 +254,7 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
    case PIPE_CAP_COMPUTE:
    case PIPE_CAP_START_INSTANCE:
+   case PIPE_CAP_QUERY_TIMESTAMP:
       return 0;
    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
       return 1;

src/gallium/include/pipe/p_defines.h

@@ -485,7 +485,8 @@ enum pipe_cap {
    PIPE_CAP_USER_INDEX_BUFFERS = 69,
    PIPE_CAP_USER_CONSTANT_BUFFERS = 70,
    PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT = 71,
-   PIPE_CAP_START_INSTANCE = 72
+   PIPE_CAP_START_INSTANCE = 72,
+   PIPE_CAP_QUERY_TIMESTAMP = 73
 };
 
 /**

src/gallium/include/pipe/p_screen.h

@@ -108,6 +108,13 @@ struct pipe_screen {
 			    enum pipe_compute_cap param,
 			    void *ret);
 
+   /**
+    * Query a timestamp in nanoseconds. The returned value should match
+    * PIPE_QUERY_TIMESTAMP. This function returns immediately and doesn't
+    * wait for rendering to complete (which cannot be achieved with queries).
+    */
+   uint64_t (*get_timestamp)(struct pipe_screen *);
+
    struct pipe_context * (*context_create)( struct pipe_screen *,
 					    void *priv );