Am 26.04.24 um 05:57 schrieb Yunxiang Li:
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@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 50 ++++++++++------------
1 file changed, 22 insertions(+), 28 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 1fd9637daafc..3c4755f3c116 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -5063,19 +5063,14 @@ static int amdgpu_device_recover_vram(struct amdgpu_device *adev)
static int amdgpu_device_reset_sriov(struct amdgpu_device *adev,
struct amdgpu_reset_context *reset_context)
{
- int r;
+ int r = 0;
Please don't initialize local variables if it isn't necessary.
As far as I can see that is initialized below and will generate a
warning from automated checkers.
Regards,
Christian.
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))
r = amdgpu_virt_request_full_gpu(adev, true);
else
r = amdgpu_virt_reset_gpu(adev);
- if (r)
- return r;
+
amdgpu_ras_set_fed(adev, false);
amdgpu_irq_gpu_reset_resume_helper(adev);
@@ -5085,7 +5080,7 @@ static int amdgpu_device_reset_sriov(struct amdgpu_device *adev,
/* 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);
@@ -5096,38 +5091,35 @@ static int amdgpu_device_reset_sriov(struct amdgpu_device *adev,
/* 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);
-
- amdgpu_amdkfd_post_reset(adev);
- }
+ r = amdgpu_ib_ring_tests(adev);
+ if (r)
+ return r;
-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);
}
- amdgpu_virt_release_full_gpu(adev, true);
+ if (r)
+ return r;
- 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");
- }
+ /* 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);
- return r;
+ return 0;
}
/**
@@ -5686,6 +5678,7 @@ 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
@@ -5767,8 +5760,7 @@ 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
@@ -5827,6 +5819,8 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
/* 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)
+ goto retry;
if (r)
adev->asic_reset_res = r;
