gallium: add PIPE_CAP_MAX_SHADER_BUFFER_SIZE

Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

src/gallium/docs/source/screen.rst

@@ -454,6 +454,8 @@ subpixel precision bias in bits during conservative rasterization.
   ```set_sample_locations```.
 * ``PIPE_CAP_MAX_GS_INVOCATIONS``: Maximum supported value of
   TGSI_PROPERTY_GS_INVOCATIONS.
+* ``PIPE_CAP_MAX_SHADER_BUFFER_SIZE``: Maximum supported size for binding
+  with set_shader_buffers.
 
 .. _pipe_capf:
 

src/gallium/drivers/etnaviv/etnaviv_screen.c

@@ -288,6 +288,9 @@ etna_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_MAX_GS_INVOCATIONS:
       return 32;
 
+   case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+      return 1 << 27;
+
    /* Stream output. */
    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -375,6 +375,9 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_MAX_GS_INVOCATIONS:
 		return 32;
 
+	case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+                return 1 << 27;
+
 	case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 		return screen->priority_mask;
 

src/gallium/drivers/i915/i915_screen.c

@@ -340,6 +340,9 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
    case PIPE_CAP_MAX_GS_INVOCATIONS:
       return 32;
 
+   case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+      return 1 << 27;
+
    case PIPE_CAP_MAX_VIEWPORTS:
       return 1;
 

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -375,6 +375,8 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 0;
    case PIPE_CAP_MAX_GS_INVOCATIONS:
       return 32;
+   case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+      return 1 << 27;
    }
    /* should only get here on unhandled cases */
    debug_printf("Unexpected PIPE_CAP %d query\n", param);

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

@@ -242,6 +242,8 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 
    case PIPE_CAP_MAX_GS_INVOCATIONS:
       return 32;
+   case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+      return 1 << 27;
    case PIPE_CAP_VENDOR_ID:
       return 0x10de;
    case PIPE_CAP_DEVICE_ID: {

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

@@ -296,6 +296,8 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 
    case PIPE_CAP_MAX_GS_INVOCATIONS:
       return 32;
+   case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+      return 1 << 27;
    case PIPE_CAP_VENDOR_ID:
       return 0x10de;
    case PIPE_CAP_DEVICE_ID: {

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

@@ -269,6 +269,8 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       return class_3d >= GM200_3D_CLASS;
    case PIPE_CAP_MAX_GS_INVOCATIONS:
       return 32;
+   case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+      return 1 << 27;
    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
       return class_3d >= GP100_3D_CLASS;
    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:

src/gallium/drivers/r300/r300_screen.c

@@ -264,6 +264,8 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 
         case PIPE_CAP_MAX_GS_INVOCATIONS:
             return 32;
+       case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+            return 1 << 27;
 
         /* SWTCL-only features. */
         case PIPE_CAP_PRIMITIVE_RESTART:

src/gallium/drivers/r600/r600_pipe.c

@@ -378,6 +378,8 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 
 	case PIPE_CAP_MAX_GS_INVOCATIONS:
 		return 32;
+	case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+		return 1 << 27;
 
 	/* Unsupported features. */
 	case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:

src/gallium/drivers/radeonsi/si_get.c

@@ -189,6 +189,7 @@ static int si_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 		return 420;
 
 	case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
+	case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
 		return MIN2(sscreen->info.max_alloc_size, INT_MAX);
 
 	case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:

src/gallium/drivers/softpipe/sp_screen.c

@@ -327,6 +327,8 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 0;
    case PIPE_CAP_MAX_GS_INVOCATIONS:
       return 32;
+   case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+      return 1 << 27;
    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
       return 4;
    }

src/gallium/drivers/svga/svga_screen.c

@@ -473,6 +473,8 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 0;
    case PIPE_CAP_MAX_GS_INVOCATIONS:
       return 32;
+   case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+      return 1 << 27;
    }
 
    debug_printf("Unexpected PIPE_CAP_ query %u\n", param);

src/gallium/drivers/swr/swr_screen.cpp

@@ -364,6 +364,8 @@ swr_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 0;
    case PIPE_CAP_MAX_GS_INVOCATIONS:
       return 32;
+   case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+      return 1 << 27;
 
    case PIPE_CAP_VENDOR_ID:
       return 0xFFFFFFFF;

src/gallium/drivers/v3d/v3d_screen.c

@@ -279,6 +279,8 @@ v3d_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
         case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 	case PIPE_CAP_MAX_GS_INVOCATIONS:
                 return 0;
+	case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+		return 1 << 27;
 
                 /* Texturing. */
         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:

src/gallium/drivers/vc4/vc4_screen.c

@@ -315,6 +315,8 @@ vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
         case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 	case PIPE_CAP_MAX_GS_INVOCATIONS:
                 return 0;
+	case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+		return 1 << 27;
 
                 /* Texturing. */
         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:

src/gallium/drivers/virgl/virgl_screen.c

@@ -310,6 +310,8 @@ virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 0;
    case PIPE_CAP_MAX_GS_INVOCATIONS:
       return 32;
+   case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
+      return 1 << 27;
    case PIPE_CAP_VENDOR_ID:
       return 0x1af4;
    case PIPE_CAP_DEVICE_ID:

src/gallium/include/pipe/p_defines.h

@@ -816,6 +816,7 @@ enum pipe_cap
    PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE,
    PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS,
    PIPE_CAP_MAX_GS_INVOCATIONS,
+   PIPE_CAP_MAX_SHADER_BUFFER_SIZE,
 };
 
 /**

src/mesa/state_tracker/st_extensions.c

@@ -468,7 +468,8 @@ void st_init_limits(struct pipe_screen *screen,
             c->MaxCombinedAtomicBuffers;
       c->MaxCombinedShaderOutputResources +=
          c->MaxCombinedShaderStorageBlocks;
-      c->MaxShaderStorageBlockSize = 1 << 27;
+      c->MaxShaderStorageBlockSize =
+         screen->get_param(screen, PIPE_CAP_MAX_SHADER_BUFFER_SIZE);
       extensions->ARB_shader_storage_buffer_object = GL_TRUE;
    }