[PATCH v3 2/7] drm/xe: Set GT as wedged before sending wedged uevent

[Riana Tauro]

On 7/3/2025 12:15 PM, Raag Jadav wrote:
> On Thu, Jul 03, 2025 at 10:48:06AM +0530, Riana Tauro wrote:
>> On 7/3/2025 9:48 AM, Raag Jadav wrote:
>>> On Wed, Jul 02, 2025 at 07:41:12PM +0530, Riana Tauro wrote:
>>>> Userspace should be notified after setting the device as wedged.
>>>> Re-order function calls to set gt wedged before sending uevent.
>>>>
>>>> Suggested-by: Raag Jadav <raag.jadav at intel.com>
>>>> Signed-off-by: Riana Tauro <riana.tauro at intel.com>
>>>> ---
>>>>    drivers/gpu/drm/xe/xe_device.c | 10 ++++++----
>>>>    1 file changed, 6 insertions(+), 4 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
>>>> index 0b73cb72bad1..4a38486dccc8 100644
>>>> --- a/drivers/gpu/drm/xe/xe_device.c
>>>> +++ b/drivers/gpu/drm/xe/xe_device.c
>>>> @@ -1123,8 +1123,10 @@ static void xe_device_wedged_fini(struct drm_device *drm, void *arg)
>>>>     * xe_device_declare_wedged - Declare device wedged
>>>>     * @xe: xe device instance
>>>>     *
>>>> - * This is a final state that can only be cleared with a module
>>>> + * This is a final state that can only be cleared with the recovery method
>>>> + * specified in the drm wedged uevent. The default recovery method is
>>>>     * re-probe (unbind + bind).
>>>> + *
>>>>     * In this state every IOCTL will be blocked so the GT cannot be used.
>>>>     * In general it will be called upon any critical error such as gt reset
>>>>     * failure or guc loading failure. Userspace will be notified of this state
>>>> @@ -1151,6 +1153,9 @@ void xe_device_declare_wedged(struct xe_device *xe)
>>>>    		return;
>>>>    	}
>>>> +	for_each_gt(gt, xe, id)
>>>> +		xe_gt_declare_wedged(gt);
>>>
>>> This is changing GuC CT state and can race with ioctls, so I think
>>> the sequence should be
>>>
>>
>> Then isn't the previous flow better. The ioctls are blocked anyway before
>> sending uevent.
> 
> Yes, the idea was to move the event call and not xe_gt_declare_wedged().
> 
> https://lore.kernel.org/intel-xe/aEMFcBSWL_jPMYKa@black.fi.intel.com

Is there any reason that xe_gt_declare wedged is not inside if?

Can this be moved inside if instead?

Thanks
Riana



> 
> Raag