Mesa (main): gallium: add PIPE_CAP_MAX_CONSTANT_BUFFER_SIZE_UINT for UBOs
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Tue Jun 7 05:19:50 UTC 2022
Module: Mesa
Branch: main
Commit: dc4a3a18e9fbeb33da15726a2257cc448ad6fe3d
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=dc4a3a18e9fbeb33da15726a2257cc448ad6fe3d
Author: Marek Olšák <marek.olsak at amd.com>
Date: Sun Jun 5 18:56:07 2022 -0400
gallium: add PIPE_CAP_MAX_CONSTANT_BUFFER_SIZE_UINT for UBOs
We plan to report UINT32_MAX for UBOs.
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz at gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16881>
---
docs/gallium/screen.rst | 1 +
src/gallium/auxiliary/util/u_screen.c | 4 ++++
src/gallium/include/pipe/p_defines.h | 1 +
src/mesa/state_tracker/st_extensions.c | 7 +------
4 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/docs/gallium/screen.rst b/docs/gallium/screen.rst
index ad226d5ed18..98757ed8ac9 100644
--- a/docs/gallium/screen.rst
+++ b/docs/gallium/screen.rst
@@ -636,6 +636,7 @@ The integer capabilities:
* ``PIPE_CAP_QUERY_SPARSE_TEXTURE_RESIDENCY``: TRUE if shader sparse texture sample instruction could also return the residency information.
* ``PIPE_CAP_CLAMP_SPARSE_TEXTURE_LOD``: TRUE if shader sparse texture sample instruction support clamp the minimal lod to prevent read from un-committed pages.
* ``PIPE_CAP_ALLOW_DRAW_OUT_OF_ORDER``: TRUE if the driver allows the "draw out of order" optimization to be enabled. See _mesa_update_allow_draw_out_of_order for more details.
+* ``PIPE_CAP_MAX_CONSTANT_BUFFER_SIZE_UINT``: Maximum bound constant buffer size in bytes. This is unsigned integer with the maximum of 4GB - 1. This applies to all constant buffers used by UBOs, unlike `PIPE_SHADER_CAP_MAX_CONST_BUFFER0_SIZE`, which is specifically for GLSL uniforms.
.. _pipe_capf:
diff --git a/src/gallium/auxiliary/util/u_screen.c b/src/gallium/auxiliary/util/u_screen.c
index 4ab547befc8..b506b1833e7 100644
--- a/src/gallium/auxiliary/util/u_screen.c
+++ b/src/gallium/auxiliary/util/u_screen.c
@@ -488,6 +488,10 @@ u_pipe_screen_get_param_defaults(struct pipe_screen *pscreen,
case PIPE_CAP_CLAMP_SPARSE_TEXTURE_LOD:
return 0;
+ case PIPE_CAP_MAX_CONSTANT_BUFFER_SIZE_UINT:
+ return pscreen->get_shader_param(pscreen, PIPE_SHADER_FRAGMENT,
+ PIPE_SHADER_CAP_MAX_CONST_BUFFER0_SIZE);
+
default:
unreachable("bad PIPE_CAP_*");
}
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 5a0903b6b32..d538e61fb70 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -1007,6 +1007,7 @@ enum pipe_cap
PIPE_CAP_QUERY_SPARSE_TEXTURE_RESIDENCY,
PIPE_CAP_CLAMP_SPARSE_TEXTURE_LOD,
PIPE_CAP_ALLOW_DRAW_OUT_OF_ORDER,
+ PIPE_CAP_MAX_CONSTANT_BUFFER_SIZE_UINT,
PIPE_CAP_LAST,
/* XXX do not add caps after PIPE_CAP_LAST! */
diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 7e498340956..8300be8fb2d 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -156,12 +156,7 @@ void st_init_limits(struct pipe_screen *screen,
PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
c->MaxUniformBlockSize =
- screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
- PIPE_SHADER_CAP_MAX_CONST_BUFFER0_SIZE);
- /* GL45-CTS.enhanced_layouts.ssb_member_invalid_offset_alignment fails if
- * this is larger than INT_MAX - 100. Use a nicely aligned limit.
- */
- c->MaxUniformBlockSize = MIN2(c->MaxUniformBlockSize, INT_MAX - 127);
+ screen->get_param(screen, PIPE_CAP_MAX_CONSTANT_BUFFER_SIZE_UINT);
if (c->MaxUniformBlockSize < 16384) {
can_ubo = false;
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