[PATCH] drm/amdgpu: Add gpu_recovery parameter

[Christian König]

Am 13.12.2017 um 13:53 schrieb Andrey Grodzovsky:
>
>
> On 12/13/2017 07:20 AM, Christian König wrote:
>> Am 12.12.2017 um 20:16 schrieb Andrey Grodzovsky:
>>> Add new parameter to control GPU recovery procedure.
>>> Retire old way of disabling GPU recovery by setting lockup_timeout 
>>> == 0 and
>>> set default for lockup_timeout to 10s.
>>>
>>> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
>>> ---
>>>   drivers/gpu/drm/amd/amdgpu/amdgpu.h        | 1 +
>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 5 +++++
>>>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    | 8 ++++++--
>>>   3 files changed, 12 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> index 3735500..26abe03 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> @@ -126,6 +126,7 @@ extern int amdgpu_param_buf_per_se;
>>>   extern int amdgpu_job_hang_limit;
>>>   extern int amdgpu_lbpw;
>>>   extern int amdgpu_compute_multipipe;
>>> +extern int amdgpu_gpu_recovery;
>>>     #ifdef CONFIG_DRM_AMDGPU_SI
>>>   extern int amdgpu_si_support;
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> index 8d03baa..d84b57a 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> @@ -3030,6 +3030,11 @@ int amdgpu_gpu_recover(struct amdgpu_device 
>>> *adev, struct amdgpu_job *job)
>>>           return 0;
>>>       }
>>>   +    if (!amdgpu_gpu_recovery) {
>>> +        DRM_INFO("GPU recovery disabled.\n");
>>> +        return 0;
>>> +    }
>>> +
>>
>> Please move this check into the caller of amdgpu_gpu_recover().
>>
>> This way we can still trigger a GPU recovery manually or from the 
>> hypervisor under SRIOV.
>>
>> Christian.
>
> Problem with this is that amdgpu_check_soft_reset will not be called, 
> this function which prints which IP block was hung even when later we 
> opt not to recover.
> I suggest instead to add a bool force_reset parameter to 
> amdgpu_gpu_recover which will override amdgpu_gpu_recovery and we can 
> set it to true from amdgpu_debugfs_gpu_recover only.

Good point and the solution sounds good to me as well.

Please go ahead with that,
Christian.

>
> Thanks,
> Andrey
>
>>
>>>       dev_info(adev->dev, "GPU reset begin!\n");
>>>         mutex_lock(&adev->lock_reset);
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c 
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>> index 0b039bd..5c612e9 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>> @@ -90,7 +90,7 @@ int amdgpu_disp_priority = 0;
>>>   int amdgpu_hw_i2c = 0;
>>>   int amdgpu_pcie_gen2 = -1;
>>>   int amdgpu_msi = -1;
>>> -int amdgpu_lockup_timeout = 0;
>>> +int amdgpu_lockup_timeout = 10000;
>>>   int amdgpu_dpm = -1;
>>>   int amdgpu_fw_load_type = -1;
>>>   int amdgpu_aspm = -1;
>>> @@ -128,6 +128,7 @@ int amdgpu_param_buf_per_se = 0;
>>>   int amdgpu_job_hang_limit = 0;
>>>   int amdgpu_lbpw = -1;
>>>   int amdgpu_compute_multipipe = -1;
>>> +int amdgpu_gpu_recovery = 1;
>>>     MODULE_PARM_DESC(vramlimit, "Restrict VRAM for testing, in 
>>> megabytes");
>>>   module_param_named(vramlimit, amdgpu_vram_limit, int, 0600);
>>> @@ -165,7 +166,7 @@ module_param_named(pcie_gen2, amdgpu_pcie_gen2, 
>>> int, 0444);
>>>   MODULE_PARM_DESC(msi, "MSI support (1 = enable, 0 = disable, -1 = 
>>> auto)");
>>>   module_param_named(msi, amdgpu_msi, int, 0444);
>>>   -MODULE_PARM_DESC(lockup_timeout, "GPU lockup timeout in ms 
>>> (default 0 = disable)");
>>> +MODULE_PARM_DESC(lockup_timeout, "GPU lockup timeout in ms (default 
>>> 10000)");
>>>   module_param_named(lockup_timeout, amdgpu_lockup_timeout, int, 0444);
>>>     MODULE_PARM_DESC(dpm, "DPM support (1 = enable, 0 = disable, -1 
>>> = auto)");
>>> @@ -280,6 +281,9 @@ module_param_named(lbpw, amdgpu_lbpw, int, 0444);
>>>   MODULE_PARM_DESC(compute_multipipe, "Force compute queues to be 
>>> spread across pipes (1 = enable, 0 = disable, -1 = auto)");
>>>   module_param_named(compute_multipipe, amdgpu_compute_multipipe, 
>>> int, 0444);
>>>   +MODULE_PARM_DESC(gpu_recovery, "Enable GPU recovery mechanism, (1 
>>> = enable (default) , 0 = disable");
>>> +module_param_named(gpu_recovery, amdgpu_gpu_recovery, int, 0444);
>>> +
>>>   #ifdef CONFIG_DRM_AMDGPU_SI
>>>     #if defined(CONFIG_DRM_RADEON) || defined(CONFIG_DRM_RADEON_MODULE)
>>
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