Commit eb296c09 authored Dec 02, 2025 by Alex Deucher

drm/amdgpu: don't attach the tlb fence for SI

SI hardware doesn't support pasids, user mode queues, or
KIQ/MES so there is no need for this.  Doing so results in
a segfault as these callbacks are non-existent for SI.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4744


Fixes: f3854e04 ("drm/amdgpu: attach tlb fence to the PTs update")
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 820b3d37)

parent 3c41114d

drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1069,7 +1069,9 @@ amdgpu_vm_tlb_flush(struct amdgpu_vm_update_params *params,
		}

		/* Prepare a TLB flush fence to be attached to PTs */
		if (!params->unlocked) {
		if (!params->unlocked &&
		/* SI doesn't support pasid or KIQ/MES */
		params->adev->family > AMDGPU_FAMILY_SI) {
		amdgpu_vm_tlb_fence_create(params->adev, vm, fence);

		/* Makes sure no PD/PT is freed before the flush */