>-----Original Message-----
>From: Fan Ni <nifan.cxl@xxxxxxxxx>
>Sent: 08 November 2024 00:36
>To: Shiju Jose <shiju.jose@xxxxxxxxxx>
>Cc: linux-edac@xxxxxxxxxxxxxxx; linux-cxl@xxxxxxxxxxxxxxx; linux-
>acpi@xxxxxxxxxxxxxxx; linux-mm@xxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
>bp@xxxxxxxxx; tony.luck@xxxxxxxxx; rafael@xxxxxxxxxx; lenb@xxxxxxxxxx;
>mchehab@xxxxxxxxxx; dan.j.williams@xxxxxxxxx; dave@xxxxxxxxxxxx; Jonathan
>Cameron <jonathan.cameron@xxxxxxxxxx>; gregkh@xxxxxxxxxxxxxxxxxxx;
>sudeep.holla@xxxxxxx; jassisinghbrar@xxxxxxxxx; dave.jiang@xxxxxxxxx;
>alison.schofield@xxxxxxxxx; vishal.l.verma@xxxxxxxxx; ira.weiny@xxxxxxxxx;
>david@xxxxxxxxxx; Vilas.Sridharan@xxxxxxx; leo.duran@xxxxxxx;
>Yazen.Ghannam@xxxxxxx; rientjes@xxxxxxxxxx; jiaqiyan@xxxxxxxxxx;
>Jon.Grimm@xxxxxxx; dave.hansen@xxxxxxxxxxxxxxx;
>naoya.horiguchi@xxxxxxx; james.morse@xxxxxxx; jthoughton@xxxxxxxxxx;
>somasundaram.a@xxxxxxx; erdemaktas@xxxxxxxxxx; pgonda@xxxxxxxxxx;
>duenwen@xxxxxxxxxx; gthelen@xxxxxxxxxx;
>wschwartz@xxxxxxxxxxxxxxxxxxx; dferguson@xxxxxxxxxxxxxxxxxxx;
>wbs@xxxxxxxxxxxxxxxxxxxxxx; nifan.cxl@xxxxxxxxx; tanxiaofei
><tanxiaofei@xxxxxxxxxx>; Zengtao (B) <prime.zeng@xxxxxxxxxxxxx>; Roberto
>Sassu <roberto.sassu@xxxxxxxxxx>; kangkang.shen@xxxxxxxxxxxxx;
>wanghuiqiang <wanghuiqiang@xxxxxxxxxx>; Linuxarm
><linuxarm@xxxxxxxxxx>
>Subject: Re: [PATCH v15 02/15] EDAC: Add scrub control feature
>
>On Fri, Nov 01, 2024 at 09:17:20AM +0000, shiju.jose@xxxxxxxxxx wrote:
>> From: Shiju Jose <shiju.jose@xxxxxxxxxx>
>>
>> Add a generic EDAC scrub control to manage memory scrubbers in the system.
>> Devices with a scrub feature register with the EDAC device driver,
>> which retrieves the scrub descriptor from the EDAC scrub driver and
>> exposes the sysfs scrub control attributes for a scrub instance to
>> userspace at /sys/bus/edac/devices/<dev-name>/scrubX/.
>>
>> The common sysfs scrub control interface abstracts the control of
>> arbitrary scrubbing functionality into a common set of functions. The
>> sysfs scrub attribute nodes are only present if the client driver has
>> implemented the corresponding attribute callback function and passed
>> the
>> operations(ops) to the EDAC device driver during registration.
>>
>> Co-developed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
>> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
>> Signed-off-by: Shiju Jose <shiju.jose@xxxxxxxxxx>
>> ---
>
>Minor comments inline.
>
>> Documentation/ABI/testing/sysfs-edac-scrub | 74 ++++++++
>> drivers/edac/Makefile | 1 +
>> drivers/edac/edac_device.c | 40 +++-
>> drivers/edac/scrub.c | 209 +++++++++++++++++++++
>> include/linux/edac.h | 34 ++++
>> 5 files changed, 354 insertions(+), 4 deletions(-) create mode
>> 100644 Documentation/ABI/testing/sysfs-edac-scrub
>> create mode 100755 drivers/edac/scrub.c
>>
>> diff --git a/Documentation/ABI/testing/sysfs-edac-scrub
>> b/Documentation/ABI/testing/sysfs-edac-scrub
>> new file mode 100644
>> index 000000000000..d8d11165ff2a
>> --- /dev/null
>> +++ b/Documentation/ABI/testing/sysfs-edac-scrub
>
>...
>
>> diff --git a/drivers/edac/edac_device.c b/drivers/edac/edac_device.c
>> index e9229b5f8afe..cd700a64406e 100644
>> --- a/drivers/edac/edac_device.c
>> +++ b/drivers/edac/edac_device.c
>> @@ -576,6 +576,7 @@ static void edac_dev_release(struct device *dev)
>> {
>> struct edac_dev_feat_ctx *ctx = container_of(dev, struct
>> edac_dev_feat_ctx, dev);
>>
>> + kfree(ctx->scrub);
>> kfree(ctx->dev.groups);
>> kfree(ctx);
>> }
>> @@ -609,6 +610,8 @@ int edac_dev_register(struct device *parent, char
>*name,
>> const struct edac_dev_feature *ras_features) {
>> const struct attribute_group **ras_attr_groups;
>> + int scrub_cnt = 0, scrub_inst = 0;
>> + struct edac_dev_data *dev_data;
>> struct edac_dev_feat_ctx *ctx;
>> int attr_gcnt = 0;
>> int ret, feat;
>> @@ -619,7 +622,10 @@ int edac_dev_register(struct device *parent, char
>*name,
>> /* Double parse to make space for attributes */
>> for (feat = 0; feat < num_features; feat++) {
>> switch (ras_features[feat].ft_type) {
>> - /* Add feature specific code */
>> + case RAS_FEAT_SCRUB:
>> + attr_gcnt++;
>> + scrub_cnt++;
>> + break;
>> default:
>> return -EINVAL;
>> }
>> @@ -635,13 +641,37 @@ int edac_dev_register(struct device *parent, char
>*name,
>> goto ctx_free;
>> }
>>
>> + if (scrub_cnt) {
>> + ctx->scrub = kcalloc(scrub_cnt, sizeof(*ctx->scrub),
>GFP_KERNEL);
>> + if (!ctx->scrub) {
>> + ret = -ENOMEM;
>> + goto groups_free;
>> + }
>> + }
>> +
>> attr_gcnt = 0;
>
>If we use scrub_cnt the same way as we use attr_gcnt, we do not need
>scrub_inst.
Hi Fan,
Thanks for suggestion. Modified and done the same for EDAC memory repair feature as well.
>
>Fan
>> for (feat = 0; feat < num_features; feat++, ras_features++) {
>> switch (ras_features->ft_type) {
>> - /* Add feature specific code */
[...]
>--
>Fan Ni
>
Thanks,
Shiju
