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drm/amdgpu: Fix amdgpu_device_reset_sriov retry logic

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The retry loop for SRIOV reset have refcount and memory leak issue.
Depending on which function call fails it can potentially call
amdgpu_amdkfd_pre/post_reset different number of times and causes
kfd_locked count to be wrong. This will block all future attempts at
opening /dev/kfd. The retry loop also leakes resources by calling
amdgpu_virt_init_data_exchange multiple times without calling the
corresponding fini function.

Align with the bare-metal reset path which doesn't have these issues.
This means taking the amdgpu_amdkfd_pre/post_reset functions out of the
reset loop and calling amdgpu_device_pre_asic_reset each retry which
properly free the resources from previous try by calling
amdgpu_virt_fini_data_exchange.

Signed-off-by: Yunxiang Li <Yunxiang.Li@amd.com>
Reviewed-by: Emily Deng <Emily.Deng@amd.com>
Reviewed-by: Zhigang Luo <zhigang.luo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Yunxiang Li
2024-04-22 15:04:52 -04:00
committed by Alex Deucher
parent a5b843269a
commit 6e4aa08fa9
1 changed files with 22 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

47
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@@ -5065,10 +5065,6 @@ static int amdgpu_device_reset_sriov(struct amdgpu_device *adev,
{
int r;
struct amdgpu_hive_info *hive = NULL;
int retry_limit = 0;
retry:
amdgpu_amdkfd_pre_reset(adev);
if (test_bit(AMDGPU_HOST_FLR, &reset_context->flags)) {
clear_bit(AMDGPU_HOST_FLR, &reset_context->flags);
@@ -5088,7 +5084,7 @@ retry:
/* Resume IP prior to SMC */
r = amdgpu_device_ip_reinit_early_sriov(adev);
if (r)
goto error;
return r;
amdgpu_virt_init_data_exchange(adev);
@@ -5099,38 +5095,35 @@ retry:
/* now we are okay to resume SMC/CP/SDMA */
r = amdgpu_device_ip_reinit_late_sriov(adev);
if (r)
goto error;
return r;
hive = amdgpu_get_xgmi_hive(adev);
/* Update PSP FW topology after reset */
if (hive && adev->gmc.xgmi.num_physical_nodes > 1)
r = amdgpu_xgmi_update_topology(hive, adev);
if (hive)
amdgpu_put_xgmi_hive(hive);
if (r)
return r;
if (!r) {
r = amdgpu_ib_ring_tests(adev);
r = amdgpu_ib_ring_tests(adev);
if (r)
return r;
amdgpu_amdkfd_post_reset(adev);
}
error:
if (!r && adev->virt.gim_feature & AMDGIM_FEATURE_GIM_FLR_VRAMLOST) {
if (adev->virt.gim_feature & AMDGIM_FEATURE_GIM_FLR_VRAMLOST) {
amdgpu_inc_vram_lost(adev);
r = amdgpu_device_recover_vram(adev);
}
if (r)
return r;
/* need to be called during full access so we can't do it later like
* bare-metal does.
*/
amdgpu_amdkfd_post_reset(adev);
amdgpu_virt_release_full_gpu(adev, true);
if (AMDGPU_RETRY_SRIOV_RESET(r)) {
if (retry_limit < AMDGPU_MAX_RETRY_LIMIT) {
retry_limit++;
goto retry;
} else
DRM_ERROR("GPU reset retry is beyond the retry limit\n");
}
return r;
return 0;
}
/**
@@ -5689,6 +5682,7 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
int i, r = 0;
bool need_emergency_restart = false;
bool audio_suspended = false;
int retry_limit = AMDGPU_MAX_RETRY_LIMIT;
/*
* Special case: RAS triggered and full reset isn't supported
@@ -5770,8 +5764,7 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
cancel_delayed_work_sync(&tmp_adev->delayed_init_work);
if (!amdgpu_sriov_vf(tmp_adev))
amdgpu_amdkfd_pre_reset(tmp_adev);
amdgpu_amdkfd_pre_reset(tmp_adev);
/*
* Mark these ASICs to be reseted as untracked first
@@ -5830,6 +5823,10 @@ retry: /* Rest of adevs pre asic reset from XGMI hive. */
/* Host driver will handle XGMI hive reset for SRIOV */
if (amdgpu_sriov_vf(adev)) {
r = amdgpu_device_reset_sriov(adev, reset_context);
if (AMDGPU_RETRY_SRIOV_RESET(r) && (retry_limit--) > 0) {
amdgpu_virt_release_full_gpu(adev, true);
goto retry;
}
if (r)
adev->asic_reset_res = r;