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radv: Update comments for gang semaphores

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Change the explanation to use "leader" and "follower" terminology.
Explain better how it is used with GFX/ACE and SDMA/ACE.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39057>
This commit is contained in:
Timur Kristóf 2025-12-22 13:31:03 -06:00 • committed by Marge Bot
parent 65bf4e7dcd
commit 4d0975dc83
1 changed files with 8 additions and 2 deletions
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10
src/amd/vulkan/radv_cmd_buffer.c
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@ -1485,8 +1485,14 @@ radv_gang_sem_init(struct radv_cmd_buffer *cmd_buffer)
if (cmd_buffer->gang.sem.va)
return true;
/* DWORD 0: GFX->ACE semaphore (GFX blocks ACE, ie. ACE waits for GFX)
* DWORD 1: ACE->GFX semaphore
/* DWORD 0:
* leader->follower semaphore: used when leader does something that the follower has to wait for
* - for transfer queues: when SDMA is working on a transfer that ACE needs to wait for
* - for task/mesh: when GFX is doing something that ACE needs to wait for
* DWORD 1:
* follower->leader semaphore: used when follower does something that the leader has to wait for
* - for transfer queues: when ACE is working on a transfer that SDMA needs to wait for
* - for task/mesh: no needed yet
*/
uint64_t sem_init = 0;
uint32_t va_off = 0;