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drm/amdgpu/sdma4.4.2: add support for disabling kernel queues

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Allow the user to disable kernel queues.  This can be used
to free up vmid resources if kernel queues are not needed.

Set amdgpu.user_queue=2 to disable kernel queues.

Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2026-05-27 16:12:07 -04:00
parent a28667f75a
commit 991fd2cb90
1 changed files with 14 additions and 0 deletions
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14
drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c
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@ -1359,6 +1359,19 @@ static int sdma_v4_4_2_early_init(struct amdgpu_ip_block *ip_block)
struct amdgpu_device *adev = ip_block->adev;
int r;
switch (amdgpu_user_queue) {
case -1:
case 0:
default:
adev->sdma.no_user_submission = false;
adev->sdma.disable_uq = true;
break;
case 2:
adev->sdma.no_user_submission = true;
adev->sdma.disable_uq = true;
break;
}
r = sdma_v4_4_2_init_microcode(adev);
if (r)
return r;
@ -1478,6 +1491,7 @@ static int sdma_v4_4_2_sw_init(struct amdgpu_ip_block *ip_block)
/* doorbell size is 2 dwords, get DWORD offset */
ring->doorbell_index = adev->doorbell_index.sdma_engine[i] << 1;
ring->vm_hub = AMDGPU_MMHUB0(aid_id);
ring->no_user_submission = adev->sdma.no_user_submission;
sprintf(ring->name, "sdma%d.%d", aid_id,
i % adev->sdma.num_inst_per_aid);