[AMD Official Use Only]
I have a discussion with Andrey about this offline. It seems dangerous to
remove the in_gpu_reset and reset_semm directly inside the flr_work. In the
case when the reset is triggered from host side , gpu need to be locked while
host perform reset after flr_work reply the host with READY_TO_RESET.
The original comments seems need to be updated.
Regards
Shaoyun.liu
-----Original Message-----
From: amd-gfx <amd-gfx-boun...@lists.freedesktop.org> On Behalf Of Andrey
Grodzovsky
Sent: Wednesday, December 22, 2021 5:14 PM
To: dri-de...@lists.freedesktop.org; amd-gfx@lists.freedesktop.org
Cc: Liu, Monk <monk....@amd.com>; Grodzovsky, Andrey
<andrey.grodzov...@amd.com>; Chen, Horace <horace.c...@amd.com>; Koenig,
Christian <christian.koe...@amd.com>; dan...@ffwll.ch
Subject: [RFC v2 8/8] drm/amd/virt: Drop concurrent GPU reset protection for
SRIOV
Since now flr work is serialized against GPU resets there is no need for this.
Signed-off-by: Andrey Grodzovsky <andrey.grodzov...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c | 11 -----------
drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c | 11 -----------
2 files changed, 22 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
index 487cd654b69e..7d59a66e3988 100644
--- a/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
@@ -248,15 +248,7 @@ static void xgpu_ai_mailbox_flr_work(struct work_struct
*work)
struct amdgpu_device *adev = container_of(virt, struct amdgpu_device,
virt);
int timeout = AI_MAILBOX_POLL_FLR_TIMEDOUT;
- /* block amdgpu_gpu_recover till msg FLR COMPLETE received,
- * otherwise the mailbox msg will be ruined/reseted by
- * the VF FLR.
- */
- if (!down_write_trylock(&adev->reset_sem))
- return;
-
amdgpu_virt_fini_data_exchange(adev);
- atomic_set(&adev->in_gpu_reset, 1);
xgpu_ai_mailbox_trans_msg(adev, IDH_READY_TO_RESET, 0, 0, 0);
@@ -269,9 +261,6 @@ static void xgpu_ai_mailbox_flr_work(struct work_struct
*work)
} while (timeout > 1);
flr_done:
- atomic_set(&adev->in_gpu_reset, 0);
- up_write(&adev->reset_sem);
-
/* Trigger recovery for world switch failure if no TDR */
if (amdgpu_device_should_recover_gpu(adev)
&& (!amdgpu_device_has_job_running(adev) || diff --git
a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
index e3869067a31d..f82c066c8e8d 100644
--- a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
@@ -277,15 +277,7 @@ static void xgpu_nv_mailbox_flr_work(struct work_struct
*work)
struct amdgpu_device *adev = container_of(virt, struct amdgpu_device,
virt);
int timeout = NV_MAILBOX_POLL_FLR_TIMEDOUT;
- /* block amdgpu_gpu_recover till msg FLR COMPLETE received,
- * otherwise the mailbox msg will be ruined/reseted by
- * the VF FLR.
- */
- if (!down_write_trylock(&adev->reset_sem))
- return;
-
amdgpu_virt_fini_data_exchange(adev);
- atomic_set(&adev->in_gpu_reset, 1);
xgpu_nv_mailbox_trans_msg(adev, IDH_READY_TO_RESET, 0, 0, 0);
@@ -298,9 +290,6 @@ static void xgpu_nv_mailbox_flr_work(struct work_struct
*work)
} while (timeout > 1);
flr_done:
- atomic_set(&adev->in_gpu_reset, 0);
- up_write(&adev->reset_sem);
-
/* Trigger recovery for world switch failure if no TDR */
if (amdgpu_device_should_recover_gpu(adev)
&& (!amdgpu_device_has_job_running(adev) ||
--
2.25.1
