[PATCH v2 1/2] drm/amdgpu: save the reset dump register value for devcoredump

[Somalapuram, Amaranath]

On 5/26/2022 3:24 PM, Sharma, Shashank wrote:
> Hey Amar,
>
> On 5/26/2022 11:48 AM, Somalapuram Amaranath wrote:
>> Allocate memory for register value and use the same values for 
>> devcoredump.
>> v1 -> V2: Change krealloc_array() to kmalloc_array()
>>
>> Signed-off-by: Somalapuram Amaranath <Amaranath.Somalapuram at amd.com>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu.h         | 1 +
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 7 +++++++
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c  | 6 +++---
>>   3 files changed, 11 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> index 76df583663c7..c79d9992b113 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> @@ -1042,6 +1042,7 @@ struct amdgpu_device {
>>         /* reset dump register */
>>       uint32_t                        *reset_dump_reg_list;
>> +    uint32_t            *reset_dump_reg_value;
>>       int                             num_regs;
>>         struct amdgpu_reset_domain    *reset_domain;
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c 
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
>> index eedb12f6b8a3..f3ac7912c29c 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
>> @@ -1709,17 +1709,24 @@ static ssize_t 
>> amdgpu_reset_dump_register_list_write(struct file *f,
>>           i++;
>>       } while (len < size);
>>   +    new = kmalloc_array(i, sizeof(uint32_t), GFP_KERNEL);
>> +    if (!new) {
>> +        ret = -ENOMEM;
>> +        goto error_free;
>> +    }
>>       ret = down_write_killable(&adev->reset_domain->sem);
>>       if (ret)
>>           goto error_free;
>>         swap(adev->reset_dump_reg_list, tmp);
>> +    swap(adev->reset_dump_reg_value, new);
>>       adev->num_regs = i;
>>       up_write(&adev->reset_domain->sem);
>>       ret = size;
>>     error_free:
>>       kfree(tmp);
>> +    kfree(new);
>>       return ret;
>>   }
>>   diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> index 4daa0e893965..866b4980a6fa 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> @@ -4720,15 +4720,15 @@ int amdgpu_device_pre_asic_reset(struct 
>> amdgpu_device *adev,
>>     static int amdgpu_reset_reg_dumps(struct amdgpu_device *adev)
>>   {
>> -    uint32_t reg_value;
>>       int i;
>>         lockdep_assert_held(&adev->reset_domain->sem);
>>       dump_stack();
>>         for (i = 0; i < adev->num_regs; i++) {
>> -        reg_value = RREG32(adev->reset_dump_reg_list[i]);
>> - trace_amdgpu_reset_reg_dumps(adev->reset_dump_reg_list[i], reg_value);
>> +        adev->reset_dump_reg_value[i] = 
>> RREG32(adev->reset_dump_reg_list[i]);
>> + trace_amdgpu_reset_reg_dumps(adev->reset_dump_reg_list[i],
>> +                adev->reset_dump_reg_value[i]);

Alignment is showing spaces in email. But its 2 tabs in code.


Regards,
S.Amarnath


> Please fix the alignment with the line above, after that, please feel 
> free to use:
> Reviewed-by: Shashank Sharma <shashank.sharma at amd.com>
>
> - Shashank
>>       }
>>         return 0;
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