From: Bart Van Assche <bvanassche@acm.org>
To: Can Guo <quic_cang@quicinc.com>,
mani@kernel.org, quic_nguyenb@quicinc.com,
quic_nitirawa@quicinc.com, martin.petersen@oracle.com
Cc: linux-scsi@vger.kernel.org, Bean Huo <beanhuo@micron.com>,
Lu Hongfei <luhongfei@vivo.com>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 6/6] scsi: ufs: ufs-sysfs: Introduce UFS power info sysfs nodes
Date: Mon, 18 Sep 2023 08:36:21 -0700 [thread overview]
Message-ID: <de7e76f8-5ed6-4de0-8084-24e220deb4b3@acm.org> (raw)
In-Reply-To: <1694411968-14413-7-git-send-email-quic_cang@quicinc.com>
On 9/10/23 22:59, Can Guo wrote:
> Having UFS power info available in sysfs makes it easier to tell the state
> of the link during runtime considering we have a bounch of power saving
> features and various combinations for backward compatiblity.
bounch -> bunch
compatiblity -> compatibility
Additionally, please combine this patch with patch 5/6 into a single patch.
> -What: /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_sum
> -What: /sys/bus/platform/devices/*.ufs/monitor/write_req_latency_sum
> -Date: January 2021
Has the above information perhaps been removed by accident?
> +What: /sys/bus/platform/drivers/ufshcd/*/power_info/gear
> +What: /sys/bus/platform/devices/*.ufs/power_info/gear
> +Date: September 2023
> Contact: Can Guo <quic_cang@quicinc.com>
> -Description: This file shows the total latency (in micro seconds) of write
> - requests after monitor gets started.
> +Description: This file shows the gear of UFS link.
> +
> + The file is read only.
Please explain what "gear" means and also what the unit is of the
numbers reported via this sysfs attribute.
> +What: /sys/bus/platform/drivers/ufshcd/*/power_info/mode
> +What: /sys/bus/platform/devices/*.ufs/power_info/mode
> +Date: September 2023
> +Contact: Can Guo <quic_cang@quicinc.com>
> +Description: This file shows the power mode of UFS link.
> +
> + The file is read only.
Please document the meaning of the numbers reported via this sysfs
attribute.
> +What: /sys/bus/platform/drivers/ufshcd/*/power_info/rate
> +What: /sys/bus/platform/devices/*.ufs/power_info/rate
> +Date: September 2023
> +Contact: Can Guo <quic_cang@quicinc.com>
> +Description: This file shows the high speed rate of UFS link.
> +
> + The file is read only.
Please document the unit of the numbers reported via this sysfs attribute.
> +What: /sys/bus/platform/drivers/ufshcd/*/power_info/dev_pm
> +What: /sys/bus/platform/devices/*.ufs/power_info/dev_pm
> +Date: September 2023
> +Contact: Can Guo <quic_cang@quicinc.com>
> +Description: This file shows the UFS device power mode, i.e., the power mode
> + set to UFS device via the Start Stop Unit command.
Please document the meaning of the numbers reported through this sysfs
attribute.
> +What: /sys/bus/platform/drivers/ufshcd/*/power_info/link_state
> +What: /sys/bus/platform/devices/*.ufs/power_info/link_state
> +Date: September 2023
> +Contact: Can Guo <quic_cang@quicinc.com>
> +Description: This file shows the the state of the UFS link.
Please document the meaning of the numbers reported through this sysfs
attribute.
Thanks,
Bart.
next prev parent reply other threads:[~2023-09-18 15:41 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1694411968-14413-1-git-send-email-quic_cang@quicinc.com>
2023-09-11 5:59 ` [PATCH 1/6] scsi: ufs: ufs-qcom: Setup host power mode during init Can Guo
2023-09-14 12:40 ` Nitin Rawat
2023-09-19 10:36 ` Manivannan Sadhasivam
2023-10-31 13:09 ` Can Guo
2023-09-11 5:59 ` [PATCH 2/6] scsi: ufs: ufs-qcom: Add support for UFS device version detection Can Guo
2023-09-11 9:17 ` Konrad Dybcio
2023-09-11 9:42 ` Can Guo
2023-09-11 9:46 ` Konrad Dybcio
2023-09-11 10:02 ` Can Guo
2023-09-15 2:31 ` Dmitry Baryshkov
2023-09-19 12:08 ` Manivannan Sadhasivam
2023-09-19 22:27 ` Dmitry Baryshkov
2023-09-20 10:23 ` Manivannan Sadhasivam
2023-09-20 11:13 ` Dmitry Baryshkov
2023-09-20 11:51 ` Manivannan Sadhasivam
2023-10-18 12:47 ` Manivannan Sadhasivam
2023-10-26 19:31 ` Konrad Dybcio
2023-10-27 12:22 ` Manivannan Sadhasivam
2023-09-15 12:48 ` Konrad Dybcio
2023-10-18 14:02 ` Neil Armstrong
[not found] ` <059cc112-7fb6-4da4-bc25-4eede0252f0e@linaro.org>
2023-10-31 5:06 ` Can Guo
2023-10-31 9:30 ` neil.armstrong
2023-09-11 5:59 ` [PATCH 3/6] phy: qualcomm: phy-qcom-qmp-ufs: Add High Speed Gear 5 support for SM8550 Can Guo
2023-09-14 12:26 ` Nitin Rawat
2023-09-15 2:07 ` Can Guo
2023-09-19 12:10 ` Manivannan Sadhasivam
2023-09-11 5:59 ` [PATCH 4/6] phy: qualcomm: phy-qcom-qmp-ufs: Move data structs and setting tables to header Can Guo
2023-09-14 11:44 ` Nitin Rawat
2023-09-14 12:28 ` Dmitry Baryshkov
2023-09-19 12:15 ` Manivannan Sadhasivam
2023-09-19 22:30 ` Dmitry Baryshkov
2023-09-20 10:19 ` Manivannan Sadhasivam
2023-09-21 14:02 ` Bjorn Andersson
2023-09-22 18:23 ` Manivannan Sadhasivam
2023-09-21 13:58 ` Bjorn Andersson
2023-09-11 5:59 ` [PATCH 5/6] scsi: ufs: ufs-sysfs: Expose UFS power info Can Guo
2023-09-14 11:33 ` Nitin Rawat
2023-09-15 1:59 ` Can Guo
2023-09-19 12:16 ` Manivannan Sadhasivam
2023-10-31 8:08 ` Can Guo
2023-10-26 19:53 ` Bart Van Assche
2023-10-31 4:46 ` Can Guo
2023-09-11 5:59 ` [PATCH 6/6] scsi: ufs: ufs-sysfs: Introduce UFS power info sysfs nodes Can Guo
2023-09-14 11:35 ` Nitin Rawat
2023-09-15 2:00 ` Can Guo
2023-09-18 15:36 ` Bart Van Assche [this message]
2023-10-31 4:53 ` Can Guo
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