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freedreno: Clamp UBO uploads to the constlen decided by the shader.

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If the NIR-level analysis decided to move UBO loads to the constant
file, but the backend decided not to load those constants, we could
upload past the end of constlen.  This is particularly relevant for
pre-a6xx, where we emit a different constlen between bin and render
variants.

(Fix by Rob, commit message by anholt)

Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Rob Clark 2019-06-23 12:52:05 -07:00 • committed by Eric Anholt
parent c1ca138475
commit 572c76fd88
1 changed files with 11 additions and 0 deletions
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11
src/gallium/drivers/freedreno/ir3/ir3_gallium.c
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@ -247,9 +247,20 @@ emit_user_consts(struct fd_context *ctx, const struct ir3_shader_variant *v,
uint32_t size = state->range[i].end - state->range[i].start;
uint32_t offset = cb->buffer_offset + state->range[i].start;
/* and even if the start of the const buffer is before
* first_immediate, the end may not be:
*/
size = MIN2(size, (16 * v->constlen) - state->range[i].offset);
if (size == 0)
continue;
/* things should be aligned to vec4: */
debug_assert((state->range[i].offset % 16) == 0);
debug_assert((size % 16) == 0);
debug_assert((offset % 16) == 0);
ctx->emit_const(ring, v->type, state->range[i].offset / 4,
offset, size / 4, cb->user_buffer, cb->buffer);
}