linux-kernel - [PATCH v7 2/3] Documentation: add a isolation strategy sysfs node for uacce

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Date:   Sat, 6 Aug 2022 10:29:42 +0800
From:   Kai Ye <yekai13@...wei.com>
To:     <gregkh@...uxfoundation.org>, <herbert@...dor.apana.org.au>
CC:     <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <wangzhou1@...ilicon.com>, <liulongfang@...wei.com>,
        <yekai13@...wei.com>
Subject: [PATCH v7 2/3] Documentation: add a isolation strategy sysfs node for uacce

Update documentation describing sysfs node that could help to
configure isolation strategy for users in the user space. And
describing sysfs node that could read the device isolated state.

Signed-off-by: Kai Ye <yekai13@...wei.com>
---
 Documentation/ABI/testing/sysfs-driver-uacce | 26 ++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-driver-uacce b/Documentation/ABI/testing/sysfs-driver-uacce
index 08f2591138af..e09fd160d3fa 100644
--- a/Documentation/ABI/testing/sysfs-driver-uacce
+++ b/Documentation/ABI/testing/sysfs-driver-uacce
@@ -19,6 +19,32 @@ Contact:        linux-accelerators@...ts.ozlabs.org
 Description:    Available instances left of the device
                 Return -ENODEV if uacce_ops get_available_instances is not provided
 
+What:           /sys/class/uacce/<dev_name>/isolate_strategy
+Date:           Jul 2022
+KernelVersion:  6.0
+Contact:        linux-accelerators@...ts.ozlabs.org
+Description:    (RW) Configure the frequency size for the hardware error
+                isolation strategy. This size is a configured integer value.
+                The default is 0. The maximum value is 65535. This value is a
+                threshold based on your driver strategies.
+
+                For example, in the hisilicon accelerator engine, first we will
+                time-stamp every slot AER error. Then check the AER error log
+                when the device AER error occurred. if the device slot AER error
+                count exceeds the preset the number of times in one hour, the
+                isolated state will be set to true. So the device will be
+                isolated. And the AER error log that exceed one hour will be
+                cleared. Of course, different strategies can be defined in
+                different drivers.
+
+What:           /sys/class/uacce/<dev_name>/isolate
+Date:           Jul 2022
+KernelVersion:  6.0
+Contact:        linux-accelerators@...ts.ozlabs.org
+Description:    (R) A sysfs node that read the device isolated state. The value 1
+                means the device is unavailable. The 0 means the device is
+                available.
+
 What:           /sys/class/uacce/<dev_name>/algorithms
 Date:           Feb 2020
 KernelVersion:  5.7
-- 
2.33.0