linux-kernel - Re: [PATCH v3 1/1] accel/habanalabs: Switch to use %ptTs

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Message-ID: <f60ed837-b605-4ce8-9b45-87a9d4f34fc4@intel.com>
Date: Wed, 2 Apr 2025 12:15:25 +0300
From: "Avizrat, Yaron" <yaron.avizrat@...el.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, Jani Nikula
	<jani.nikula@...ux.intel.com>
CC: <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>, "Oded
 Gabbay" <ogabbay@...nel.org>, "Elbaz, Koby" <koby.elbaz@...el.com>, "Sinyuk,
 Konstantin" <konstantin.sinyuk@...el.com>
Subject: Re: [PATCH v3 1/1] accel/habanalabs: Switch to use %ptTs


On 26/03/2025 17:51, Andy Shevchenko wrote:
> On Wed, Mar 26, 2025 at 11:55:33AM +0200, Jani Nikula wrote:
>> On Wed, 26 Mar 2025, Andy Shevchenko <andriy.shevchenko@...ux.intel.com> wrote:
>>> +Cc: Jani (sorry, forgot to add you in the first place).
>>>
>>> Do you think it's applicable now?
>> Cc: Yaron, Koby, and Konstantin who are supposed to be the new
>> maintainers for accel/habanalabs.
> Thank you!
Acked-by: Yaron Avizrat <yaron.avizrat@...el.com>

Thanks,
Yaron
>>> On Wed, Mar 05, 2025 at 01:00:25PM +0200, Andy Shevchenko wrote:
>>>> Use %ptTs instead of open-coded variant to print contents of time64_t type
>>>> in human readable form.
>>>>
>>>> This changes N/A output to 1970-01-01 00:00:00 for zero timestamps,
>>>> but it's used only in the dev_err() output and won't break anything.
>>>>
>>>> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>>>> ---
>>>>
>>>> v3: explained the difference for N/A cases (Jani)
>>>> v2: fixed the parameters to be the pointers
>>>>
>>>>  drivers/accel/habanalabs/common/device.c | 25 +++---------------------
>>>>  1 file changed, 3 insertions(+), 22 deletions(-)
>>>>
>>>> diff --git a/drivers/accel/habanalabs/common/device.c b/drivers/accel/habanalabs/common/device.c
>>>> index 68eebed3b050..80fa08bf57bd 100644
>>>> --- a/drivers/accel/habanalabs/common/device.c
>>>> +++ b/drivers/accel/habanalabs/common/device.c
>>>> @@ -1066,28 +1066,11 @@ static bool is_pci_link_healthy(struct hl_device *hdev)
>>>>  	return (device_id == hdev->pdev->device);
>>>>  }
>>>>  
>>>> -static void stringify_time_of_last_heartbeat(struct hl_device *hdev, char *time_str, size_t size,
>>>> -						bool is_pq_hb)
>>>> -{
>>>> -	time64_t seconds = is_pq_hb ? hdev->heartbeat_debug_info.last_pq_heartbeat_ts
>>>> -					: hdev->heartbeat_debug_info.last_eq_heartbeat_ts;
>>>> -	struct tm tm;
>>>> -
>>>> -	if (!seconds)
>>>> -		return;
>>>> -
>>>> -	time64_to_tm(seconds, 0, &tm);
>>>> -
>>>> -	snprintf(time_str, size, "%ld-%02d-%02d %02d:%02d:%02d (UTC)",
>>>> -		tm.tm_year + 1900, tm.tm_mon, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
>>>> -}
>>>> -
>>>>  static bool hl_device_eq_heartbeat_received(struct hl_device *hdev)
>>>>  {
>>>>  	struct eq_heartbeat_debug_info *heartbeat_debug_info = &hdev->heartbeat_debug_info;
>>>>  	u32 cpu_q_id = heartbeat_debug_info->cpu_queue_id, pq_pi_mask = (HL_QUEUE_LENGTH << 1) - 1;
>>>>  	struct asic_fixed_properties *prop = &hdev->asic_prop;
>>>> -	char pq_time_str[64] = "N/A", eq_time_str[64] = "N/A";
>>>>  
>>>>  	if (!prop->cpucp_info.eq_health_check_supported)
>>>>  		return true;
>>>> @@ -1095,17 +1078,15 @@ static bool hl_device_eq_heartbeat_received(struct hl_device *hdev)
>>>>  	if (!hdev->eq_heartbeat_received) {
>>>>  		dev_err(hdev->dev, "EQ heartbeat event was not received!\n");
>>>>  
>>>> -		stringify_time_of_last_heartbeat(hdev, pq_time_str, sizeof(pq_time_str), true);
>>>> -		stringify_time_of_last_heartbeat(hdev, eq_time_str, sizeof(eq_time_str), false);
>>>>  		dev_err(hdev->dev,
>>>> -			"EQ: {CI %u, HB counter %u, last HB time: %s}, PQ: {PI: %u, CI: %u (%u), last HB time: %s}\n",
>>>> +			"EQ: {CI %u, HB counter %u, last HB time: %ptTs}, PQ: {PI: %u, CI: %u (%u), last HB time: %ptTs}\n",
>>>>  			hdev->event_queue.ci,
>>>>  			heartbeat_debug_info->heartbeat_event_counter,
>>>> -			eq_time_str,
>>>> +			&hdev->heartbeat_debug_info.last_eq_heartbeat_ts,
>>>>  			hdev->kernel_queues[cpu_q_id].pi,
>>>>  			atomic_read(&hdev->kernel_queues[cpu_q_id].ci),
>>>>  			atomic_read(&hdev->kernel_queues[cpu_q_id].ci) & pq_pi_mask,
>>>> -			pq_time_str);
>>>> +			&hdev->heartbeat_debug_info.last_pq_heartbeat_ts);
>>>>  
>>>>  		hl_eq_dump(hdev, &hdev->event_queue);