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Sat, 27 Jul 2024 00:06:48 +0800 (CST) Received: from P_UKIT01-A7bmah.china.huawei.com (10.126.173.33) by lhrpeml500006.china.huawei.com (7.191.161.198) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 26 Jul 2024 17:06:47 +0100 From: To: , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v10 01/11] EDAC: Add generic EDAC RAS control feature driver Date: Fri, 26 Jul 2024 17:05:45 +0100 Message-ID: <20240726160556.2079-2-shiju.jose@huawei.com> X-Mailer: git-send-email 2.43.0.windows.1 In-Reply-To: <20240726160556.2079-1-shiju.jose@huawei.com> References: <20240726160556.2079-1-shiju.jose@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.126.173.33] X-ClientProxiedBy: lhrpeml100003.china.huawei.com (7.191.160.210) To lhrpeml500006.china.huawei.com (7.191.161.198) X-Rspamd-Queue-Id: 151571C000F X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: kinfco3fgdhom7rgeb3w7i6uk8734m3b X-HE-Tag: 1722010012-337817 X-HE-Meta: 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 UV+yQqzj vxwCFFX7PKCg68QeE19B/0B2PUtei1Cx2tQwLnZcTY9LqDi+O9/iu3L4p2loRib6zgBeMT4luO3gycXf9DruTBBCiTTik40T/yQmMfOTyLThuYnYssRJILm4KmseEc2S0rNPZWy1+CB09t9BOsMJB21OPzQOuiC0/ogUBLWdux7xnadbYf+4rJQhIiTfW7obWYwkUeh5s/vafx7WxTznUZpLDkg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Shiju Jose Add generic EDAC driver supports registering RAS features supported in the system. The driver exposes feature's control attributes to the userspace in /sys/bus/edac/devices/// Co-developed-by: Jonathan Cameron Signed-off-by: Jonathan Cameron Signed-off-by: Shiju Jose --- drivers/edac/Makefile | 1 + drivers/edac/edac_ras_feature.c | 181 +++++++++++++++++++++++++++++++ include/linux/edac_ras_feature.h | 66 +++++++++++ 3 files changed, 248 insertions(+) create mode 100755 drivers/edac/edac_ras_feature.c create mode 100755 include/linux/edac_ras_feature.h diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile index 9c09893695b7..c532b57a6d8a 100644 --- a/drivers/edac/Makefile +++ b/drivers/edac/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_EDAC) := edac_core.o edac_core-y := edac_mc.o edac_device.o edac_mc_sysfs.o edac_core-y += edac_module.o edac_device_sysfs.o wq.o +edac_core-y += edac_ras_feature.o edac_core-$(CONFIG_EDAC_DEBUG) += debugfs.o diff --git a/drivers/edac/edac_ras_feature.c b/drivers/edac/edac_ras_feature.c new file mode 100755 index 000000000000..dca19fd511b5 --- /dev/null +++ b/drivers/edac/edac_ras_feature.c @@ -0,0 +1,181 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * EDAC RAS control feature driver supports registering RAS + * features with the EDAC and exposes the feature's control + * attributes to the userspace in sysfs. + * + * Copyright (c) 2024 HiSilicon Limited. + */ + +#define pr_fmt(fmt) "EDAC RAS FEAT: " fmt + +#include + +static void edac_ras_dev_release(struct device *dev) +{ + struct edac_ras_feat_ctx *ctx = + container_of(dev, struct edac_ras_feat_ctx, dev); + + kfree(ctx->dev.groups); + kfree(ctx); +} + +const struct device_type edac_ras_dev_type = { + .name = "edac_ras_dev", + .release = edac_ras_dev_release, +}; + +static void edac_ras_dev_unreg(void *data) +{ + device_unregister(data); +} + +/** + * edac_ras_feat_scrub_init - Init ras scrub feature + * @parent: client device. + * @sdata: pointer to struct edac_scrub_data. + * @sfeat: pointer to struct edac_ras_feature for scrub. + * @attr_groups: pointer to attribute group's container. + * + * Returns number of scrub feature's attribute groups on success, + * error otherwise. + */ +static int edac_ras_feat_scrub_init(struct device *parent, + struct edac_scrub_data *sdata, + const struct edac_ras_feature *sfeat, + const struct attribute_group **attr_groups) +{ + sdata->ops = sfeat->scrub_ops; + sdata->private = sfeat->scrub_ctx; + + return 1; +} + +/** + * edac_ras_feat_ecs_init - Init ras ecs feature + * @parent: client device. + * @edata: pointer to struct edac_ecs_data. + * @efeat: pointer to struct edac_ras_feature for ecs. + * @attr_groups: pointer to attribute group's container. + * + * Returns number of ecs feature's attribute groups on success, + * error otherwise. + */ +static int edac_ras_feat_ecs_init(struct device *parent, + struct edac_ecs_data *edata, + const struct edac_ras_feature *efeat, + const struct attribute_group **attr_groups) +{ + int num = efeat->ecs_info.num_media_frus; + + edata->ops = efeat->ecs_ops; + edata->private = efeat->ecs_ctx; + + return num; +} + +/** + * edac_ras_dev_register - register device for ras features with edac + * @parent: client device. + * @name: client device's name. + * @private: parent driver's data to store in the context if any. + * @num_features: number of ras features to register. + * @ras_features: list of ras features to register. + * + * Returns 0 on success, error otherwise. + * The new edac_ras_feat_ctx would be freed automatically. + */ +int edac_ras_dev_register(struct device *parent, char *name, + void *private, int num_features, + const struct edac_ras_feature *ras_features) +{ + const struct attribute_group **ras_attr_groups; + struct edac_ras_feat_ctx *ctx; + int attr_gcnt = 0; + int ret, feat; + + if (!parent || !name || !num_features || !ras_features) + return -EINVAL; + + /* Double parse so we can make space for attributes */ + for (feat = 0; feat < num_features; feat++) { + switch (ras_features[feat].feat) { + case RAS_FEAT_SCRUB: + attr_gcnt++; + break; + case RAS_FEAT_ECS: + attr_gcnt += ras_features[feat].ecs_info.num_media_frus; + break; + default: + return -EINVAL; + } + } + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->dev.parent = parent; + ctx->private = private; + + ras_attr_groups = kcalloc(attr_gcnt + 1, sizeof(*ras_attr_groups), GFP_KERNEL); + if (!ras_attr_groups) { + ret = -ENOMEM; + goto ctx_free; + } + + attr_gcnt = 0; + for (feat = 0; feat < num_features; feat++, ras_features++) { + switch (ras_features->feat) { + case RAS_FEAT_SCRUB: + if (!ras_features->scrub_ops) + continue; + ret = edac_ras_feat_scrub_init(parent, &ctx->scrub, + ras_features, + &ras_attr_groups[attr_gcnt]); + if (ret < 0) + goto groups_free; + + attr_gcnt += ret; + break; + case RAS_FEAT_ECS: + if (!ras_features->ecs_ops) + continue; + ret = edac_ras_feat_ecs_init(parent, &ctx->ecs, + ras_features, + &ras_attr_groups[attr_gcnt]); + if (ret < 0) + goto groups_free; + + attr_gcnt += ret; + break; + default: + ret = -EINVAL; + goto groups_free; + } + } + ras_attr_groups[attr_gcnt] = NULL; + ctx->dev.bus = edac_get_sysfs_subsys(); + ctx->dev.type = &edac_ras_dev_type; + ctx->dev.groups = ras_attr_groups; + dev_set_drvdata(&ctx->dev, ctx); + ret = dev_set_name(&ctx->dev, name); + if (ret) + goto groups_free; + + ret = device_register(&ctx->dev); + if (ret) { + put_device(&ctx->dev); + goto groups_free; + return ret; + } + + return devm_add_action_or_reset(parent, edac_ras_dev_unreg, &ctx->dev); + +groups_free: + kfree(ras_attr_groups); +ctx_free: + kfree(ctx); + return ret; +} +EXPORT_SYMBOL_GPL(edac_ras_dev_register); diff --git a/include/linux/edac_ras_feature.h b/include/linux/edac_ras_feature.h new file mode 100755 index 000000000000..8f0e0c47a617 --- /dev/null +++ b/include/linux/edac_ras_feature.h @@ -0,0 +1,66 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * EDAC RAS control features. + * + * Copyright (c) 2024 HiSilicon Limited. + */ + +#ifndef __EDAC_RAS_FEAT_H +#define __EDAC_RAS_FEAT_H + +#include +#include + +#define EDAC_RAS_NAME_LEN 128 + +enum edac_ras_feat { + RAS_FEAT_SCRUB, + RAS_FEAT_ECS, + RAS_FEAT_MAX +}; + +struct edac_ecs_ex_info { + u16 num_media_frus; +}; + +/* + * EDAC RAS feature information structure + */ +struct edac_scrub_data { + const struct edac_scrub_ops *ops; + void *private; +}; + +struct edac_ecs_data { + const struct edac_ecs_ops *ops; + void *private; +}; + +struct device; + +struct edac_ras_feat_ctx { + struct device dev; + void *private; + struct edac_scrub_data scrub; + struct edac_ecs_data ecs; +}; + +struct edac_ras_feature { + enum edac_ras_feat feat; + union { + const struct edac_scrub_ops *scrub_ops; + const struct edac_ecs_ops *ecs_ops; + }; + union { + void *scrub_ctx; + void *ecs_ctx; + }; + union { + struct edac_ecs_ex_info ecs_info; + }; +}; + +int edac_ras_dev_register(struct device *parent, char *dev_name, + void *parent_pvt_data, int num_features, + const struct edac_ras_feature *ras_features); +#endif /* __EDAC_RAS_FEAT_H */