linux-kernel - [RFC PATCH 2/9] memory: scrub: sysfs: Add Documentation entries for set of scrub attributes

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Date:   Sat, 16 Sep 2023 01:28:11 +0800
From:   <shiju.jose@...wei.com>
To:     <linux-acpi@...r.kernel.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>
CC:     <rafael@...nel.org>, <lenb@...nel.org>, <naoya.horiguchi@....com>,
        <tony.luck@...el.com>, <james.morse@....com>,
        <dave.hansen@...ux.intel.com>, <david@...hat.com>,
        <jiaqiyan@...gle.com>, <jthoughton@...gle.com>,
        <somasundaram.a@....com>, <erdemaktas@...gle.com>,
        <pgonda@...gle.com>, <rientjes@...gle.com>, <duenwen@...gle.com>,
        <Vilas.Sridharan@....com>, <mike.malvestuto@...el.com>,
        <gthelen@...gle.com>, <linuxarm@...wei.com>,
        <jonathan.cameron@...wei.com>, <tanxiaofei@...wei.com>,
        <prime.zeng@...ilicon.com>, <shiju.jose@...wei.com>
Subject: [RFC PATCH 2/9] memory: scrub: sysfs: Add Documentation entries for set of scrub attributes

From: Shiju Jose <shiju.jose@...wei.com>

Add sysfs documentation entries for the set of attributes those are
exposed in /sys/class/scrub/ by the scrub driver. These attributes
support configuring parameters of a scrub device.

Signed-off-by: Shiju Jose <shiju.jose@...wei.com>
---
 .../ABI/testing/sysfs-class-scrub-configure   | 82 +++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-class-scrub-configure

diff --git a/Documentation/ABI/testing/sysfs-class-scrub-configure b/Documentation/ABI/testing/sysfs-class-scrub-configure
new file mode 100644
index 000000000000..347e2167dc62
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-scrub-configure
@@ -0,0 +1,82 @@
+What:		/sys/class/scrub/
+Date:		September 2023
+KernelVersion:	6.7
+Contact:	linux-kernel@...r.kernel.org
+Description:
+		The scrub/ class subdirectory belongs to the
+		scrubber subsystem.
+
+What:		/sys/class/scrub/scrubX/
+Date:		September 2023
+KernelVersion:	6.7
+Contact:	linux-kernel@...r.kernel.org
+Description:
+		The /sys/class/scrub/scrub{0,1,2,3,...} directories
+		correspond to each scrub device.
+
+What:		/sys/class/scrub/scrubX/name
+Date:		September 2023
+KernelVersion:	6.7
+Contact:	linux-kernel@...r.kernel.org
+Description:
+		(RO) name of the memory scrub device
+
+What:		/sys/class/scrub/scrubX/regionY/
+Date:		September 2023
+KernelVersion:	6.7
+Contact:	linux-kernel@...r.kernel.org
+Description:
+		The /sys/class/scrub/scrubX/region{0,1,2,3,...}
+		directories correspond to each scrub region under a scrub device.
+		Scrub region is a physical address range for which scrub may be
+		separately controlled. Regions may overlap in which case the
+		scrubbing rate of the overlapped memory will be at least that
+		expected due to each overlapping region.
+
+What:		/sys/class/scrub/scrubX/regionY/addr_base
+Date:		September 2023
+KernelVersion:	6.7
+Contact:	linux-kernel@...r.kernel.org
+Description:
+		(RW) The base of the address range of the memory region
+		to be patrol scrubbed.
+		On reading, returns the base of the memory region for
+		the actual address range(The platform calculates
+		the nearest patrol scrub boundary address from where
+		it can start scrubbing).
+
+What:		/sys/class/scrub/scrubX/regionY/addr_size
+Date:		September 2023
+KernelVersion:	6.7
+Contact:	linux-kernel@...r.kernel.org
+Description:
+		(RW) The size of the address range to be patrol scrubbed.
+		On reading, returns the size of the memory region for
+		the actual address range.
+
+What:		/sys/class/scrub/scrubX/regionY/enable
+Date:		September 2023
+KernelVersion:	6.7
+Contact:	linux-kernel@...r.kernel.org
+Description:
+		(WO) Start/Stop scrubbing the memory region.
+		1 - enable the memory scrubbing.
+		0 - disable the memory scrubbing..
+
+What:		/sys/class/scrub/scrubX/regionY/speed_available
+Date:		September 2023
+KernelVersion:	6.7
+Contact:	linux-kernel@...r.kernel.org
+Description:
+		(RO) Supported range for the partol speed(scrub rate)
+		by the scrubber for a memory region.
+		The unit of the scrub rate vary depends on the scrubber.
+
+What:		/sys/class/scrub/scrubX/regionY/speed
+Date:		September 2023
+KernelVersion:	6.7
+Contact:	linux-kernel@...r.kernel.org
+Description:
+		(RW) The partol speed(scrub rate) on the memory region specified and
+		it must be with in the supported range by the scrubber.
+		The unit of the scrub rate vary depends on the scrubber.
-- 
2.34.1