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panfrost: Reserve an extra page for spilling

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I'm not sure what this is for, but the blob does it and I'd rather not
poke farther than needed into hardware-internal details.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3950>
This commit is contained in:
Alyssa Rosenzweig 2020-02-25 15:36:11 -05:00 • committed by Tomeu Vizoso
parent f37cec3275
commit 40fd1f9da4
1 changed files with 6 additions and 3 deletions
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9
src/panfrost/encoder/pan_scratch.c
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@ -86,7 +86,8 @@ panfrost_get_stack_shift(unsigned stack_size)
return util_logbase2_ceil(MAX2(stack_size, 256)) - 4;
}
/* Computes the aligned stack size given the shift and thread count */
/* Computes the aligned stack size given the shift and thread count. The blob
* reserves an extra page, and since this is hardware-internal, we do too. */
unsigned
panfrost_get_total_stack_size(
@ -94,6 +95,8 @@ panfrost_get_total_stack_size(
unsigned threads_per_core,
unsigned core_count)
{
unsigned stack_size = 1 << (stack_shift + 4);
return stack_size * threads_per_core * core_count;
unsigned size_per_thread = MAX2(1 << (stack_shift + 4), 32);
unsigned size = size_per_thread * threads_per_core * core_count;
return size + 4096;
}