gallium: add PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS

This allows the driver to signal that it can't handle random
interleaving of attributes across buffers. This is required for
ARB_transform_feedback3, and it's initialized to whatever the previous
value of PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME was except for nv50 where
it is disabled. Note that the proprietary drivers never expose
ARB_transform_feedback3 on any GT21x's (where nouveau previously did),
and after some effort I was unable to get it to work.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

docs/features.txt

@@ -133,7 +133,7 @@ GL 4.0, GLSL 4.00 --- all DONE: i965/gen8+, nvc0, r600, radeonsi
   GL_ARB_texture_gather                                 DONE (i965/gen6+, nv50, llvmpipe, softpipe, swr)
   GL_ARB_texture_query_lod                              DONE (i965, nv50, softpipe)
   GL_ARB_transform_feedback2                            DONE (i965/gen7+, nv50, llvmpipe, softpipe, swr)
-  GL_ARB_transform_feedback3                            DONE (i965/gen7+, nv50, llvmpipe, softpipe, swr)
+  GL_ARB_transform_feedback3                            DONE (i965/gen7+, llvmpipe, softpipe, swr)
 
 
 GL 4.1, GLSL 4.10 --- all DONE: i965/gen8+, nvc0, r600, radeonsi

src/gallium/docs/source/screen.rst

@@ -361,6 +361,9 @@ The integer capabilities:
   equal interpolation qualifiers.
   Components may overlap, notably when the gaps in an array of dvec3 are
   filled in.
+* ``PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS``: Whether interleaved stream
+  output mode is able to interleave across buffers. This is required for
+  ARB_transform_feedback3.
 
 
 .. _pipe_capf:

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -307,6 +307,7 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 			return PIPE_MAX_SO_BUFFERS;
 		return 0;
 	case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+	case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 		if (is_ir3(screen))
 			return 1;
 		return 0;

src/gallium/drivers/i915/i915_screen.c

@@ -282,6 +282,7 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
 
    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+   case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
    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:

src/gallium/drivers/ilo/ilo_screen.c

@@ -399,6 +399,7 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
       return ILO_MAX_SO_BINDINGS;
    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+   case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
       if (ilo_dev_gen(&is->dev) >= ILO_GEN(7))
          return is->dev.has_gen7_sol_reset;
       else

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -200,6 +200,7 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
       return 2048;
    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+   case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
       return 1;
    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
       return 0;

src/gallium/drivers/nouveau/nv30/nv30_screen.c

@@ -119,6 +119,7 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR: /* XXX: yes? */
    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+   case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
    case PIPE_CAP_MIN_TEXEL_OFFSET:
    case PIPE_CAP_MAX_TEXEL_OFFSET:
    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:

src/gallium/drivers/nouveau/nv50/nv50_screen.c

@@ -254,6 +254,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_TGSI_VOTE:
    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
+   case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:

src/gallium/drivers/nouveau/nvc0/nvc0_screen.c

@@ -189,6 +189,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_QUERY_TIME_ELAPSED:
    case PIPE_CAP_OCCLUSION_QUERY:
    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+   case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
    case PIPE_CAP_INDEP_BLEND_ENABLE:

src/gallium/drivers/r300/r300_screen.c

@@ -165,6 +165,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
         case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
         case PIPE_CAP_MAX_VERTEX_STREAMS:
         case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+        case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
         case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
         case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
         case PIPE_CAP_COMPUTE:

src/gallium/drivers/r600/r600_pipe.c

@@ -385,6 +385,7 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 		return rscreen->b.has_streamout ? 4 : 0;
 	case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+	case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 		return rscreen->b.has_streamout ? 1 : 0;
 	case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 	case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:

src/gallium/drivers/radeonsi/si_pipe.c

@@ -479,6 +479,7 @@ static int si_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 		return sscreen->b.has_streamout ? 4 : 0;
 	case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+	case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 		return sscreen->b.has_streamout ? 1 : 0;
 	case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 	case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:

src/gallium/drivers/softpipe/sp_screen.c

@@ -163,6 +163,7 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_USER_INDEX_BUFFERS:
    case PIPE_CAP_USER_CONSTANT_BUFFERS:
    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+   case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
       return 1;
    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:

src/gallium/drivers/svga/svga_screen.c

@@ -298,6 +298,7 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
       return sws->have_vgpu10 ? SVGA3D_MAX_STREAMOUT_DECLS : 0;
    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+   case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
       return 0;
    case PIPE_CAP_TEXTURE_MULTISAMPLE:
       return svgascreen->ms_samples ? 1 : 0;

src/gallium/drivers/swr/swr_screen.cpp

@@ -248,6 +248,7 @@ swr_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_USER_INDEX_BUFFERS:
    case PIPE_CAP_USER_CONSTANT_BUFFERS:
    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+   case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
       return 1;
    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:

src/gallium/drivers/vc4/vc4_screen.c

@@ -244,6 +244,7 @@ vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
                 /* Stream output. */
         case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
         case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+        case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
         case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
         case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
                 return 0;

src/gallium/drivers/virgl/virgl_screen.c

@@ -148,6 +148,7 @@ virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
       return 16;
    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+   case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
       return vscreen->caps.caps.v1.bset.streamout_pause_resume;
    case PIPE_CAP_START_INSTANCE:
       return vscreen->caps.caps.v1.bset.start_instance;

src/gallium/include/pipe/p_defines.h

@@ -739,6 +739,7 @@ enum pipe_cap
    PIPE_CAP_VIEWPORT_SUBPIXEL_BITS,
    PIPE_CAP_MIXED_COLOR_DEPTH_BITS,
    PIPE_CAP_TGSI_ARRAY_COMPONENTS,
+   PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS,
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)

src/mesa/state_tracker/st_extensions.c

@@ -615,7 +615,7 @@ void st_init_extensions(struct pipe_screen *screen,
       { o(ARB_texture_view),                 PIPE_CAP_SAMPLER_VIEW_TARGET              },
       { o(ARB_timer_query),                  PIPE_CAP_QUERY_TIMESTAMP                  },
       { o(ARB_transform_feedback2),          PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME       },
-      { o(ARB_transform_feedback3),          PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME       },
+      { o(ARB_transform_feedback3),          PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS },
 
       { o(EXT_blend_equation_separate),      PIPE_CAP_BLEND_EQUATION_SEPARATE          },
       { o(EXT_depth_bounds_test),            PIPE_CAP_DEPTH_BOUNDS_TEST                },