[PATCH 2/2] drm/amdkfd: Change unique_id to print hex format

[Felix Kuehling]

So rocm-smi reads the decimal and converts it to hex? Then changing KFD
will break rocm-smi. If you want to fix rocminfo, you'll need to fix it
in the rocminfo code to do the conversion to hex.

Regards,
  Felix

Am 2020-10-28 um 12:02 p.m. schrieb Russell, Kent:
> [AMD Public Use]
>
> rocminfo uses it, but that's all that I am aware of. I can drop this though and stick with patch1, I just didn't know if we'd end up getting complaints of:
> "Well, rocm-smi (amdgpu) says that the unique_id is F, while rocminfo (amdkfd) says that the unique_id is 16" . Probably too late to try to change it now though, as you pointed out.
>
>  Kent
>
>> -----Original Message-----
>> From: Kuehling, Felix <Felix.Kuehling at amd.com>
>> Sent: Wednesday, October 28, 2020 11:55 AM
>> To: amd-gfx at lists.freedesktop.org; Russell, Kent <Kent.Russell at amd.com>
>> Subject: Re: [PATCH 2/2] drm/amdkfd: Change unique_id to print hex format
>>
>> This is an ABI-breaking change. Is any user mode code using this already?
>>
>> Regards,
>>   Felix
>>
>> Am 2020-10-28 um 11:22 a.m. schrieb Kent Russell:
>>> amdgpu's unique_id prints in hex format, so change topology's printout
>>> to hex by adding a new sysfs_print macro specifically for hex output,
>>> and use it for unique_id
>>>
>>> Signed-off-by: Kent Russell <kent.russell at amd.com>
>>> ---
>>>  drivers/gpu/drm/amd/amdkfd/kfd_topology.c | 4 +++-
>>>  1 file changed, 3 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
>> b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
>>> index a3fc23873819..d13c68c52bbc 100644
>>> --- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
>>> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
>>> @@ -217,6 +217,8 @@ struct kfd_topology_device *kfd_create_topology_device(
>>>  		sysfs_show_gen_prop(buffer, offs, "%s %u\n", name, value)
>>>  #define sysfs_show_64bit_prop(buffer, offs, name, value) \
>>>  		sysfs_show_gen_prop(buffer, offs, "%s %llu\n", name, value)
>>> +#define sysfs_show_64bit_prop_hex(buffer, offs, name, value) \
>>> +		sysfs_show_gen_prop(buffer, offs, "%s %llx\n", name, value)
>>>  #define sysfs_show_32bit_val(buffer, offs, value) \
>>>  		sysfs_show_gen_prop(buffer, offs, "%u\n", value)
>>>  #define sysfs_show_str_val(buffer, offs, value) \
>>> @@ -497,7 +499,7 @@ static ssize_t node_show(struct kobject *kobj, struct attribute
>> *attr,
>>>  			      dev->node_props.num_sdma_queues_per_engine);
>>>  	sysfs_show_32bit_prop(buffer, offs, "num_cp_queues",
>>>  			      dev->node_props.num_cp_queues);
>>> -	sysfs_show_64bit_prop(buffer, offs, "unique_id",
>>> +	sysfs_show_64bit_prop_hex(buffer, offs, "unique_id",
>>>  			      dev->node_props.unique_id);
>>>
>>>  	if (dev->gpu) {