From patchwork Fri Nov 1 09:17:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiju Jose X-Patchwork-Id: 13859005 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 25253154C17; Fri, 1 Nov 2024 09:17:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730452677; cv=none; b=rtLUnNtQw0Q6KaSGXbv6A8t7W+ho2/S/9cLPWhoIlo1My5ckAyJ7aedcJb5CHUGA4vzLbLc/HiVYL8i8NUzv2KFMXkGsaKgMiUoh86XfWgZUe5CQa98j0MNA/sf1gpoyKo4j+Woddr/LqCl6sSnVtJieE2Oj76VxTR3jEEBxgco= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730452677; c=relaxed/simple; bh=hrpJyw9+3n15pBc1Ept7Dz8NqBT1q0ckDGJO4LtdMRs=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=TDFxENOzeoT48BtMDJHSrIPU2s6zZPCh5WyCps2H0fhGzykc5NiU84wxG9yvqBQYZHo9ctRQn15b9eMBRth83WPHQfplOO8gzZbBhEX2JgVbXcTgN6w7K0ytB9j0mF6mADWfYm11G1TkSgZP2JkmGIdeXfjp8OuT5f9s/h4nsT8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.216]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4XfwF441ynz6K6Kb; Fri, 1 Nov 2024 17:15:20 +0800 (CST) Received: from frapeml500007.china.huawei.com (unknown [7.182.85.172]) by mail.maildlp.com (Postfix) with ESMTPS id 80B1C1404FC; Fri, 1 Nov 2024 17:17:51 +0800 (CST) Received: from P_UKIT01-A7bmah.china.huawei.com (10.126.171.129) by frapeml500007.china.huawei.com (7.182.85.172) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 1 Nov 2024 10:17:49 +0100 From: To: , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v15 01/15] EDAC: Add support for EDAC device features control Date: Fri, 1 Nov 2024 09:17:19 +0000 Message-ID: <20241101091735.1465-2-shiju.jose@huawei.com> X-Mailer: git-send-email 2.43.0.windows.1 In-Reply-To: <20241101091735.1465-1-shiju.jose@huawei.com> References: <20241101091735.1465-1-shiju.jose@huawei.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: lhrpeml500004.china.huawei.com (7.191.163.9) To frapeml500007.china.huawei.com (7.182.85.172) From: Shiju Jose Add generic EDAC device feature controls supporting the registration of RAS features available in the system. The driver exposes control attributes for these features to userspace in /sys/bus/edac/devices/// Co-developed-by: Jonathan Cameron Signed-off-by: Jonathan Cameron Signed-off-by: Shiju Jose --- drivers/edac/edac_device.c | 101 +++++++++++++++++++++++++++++++++++++ include/linux/edac.h | 30 +++++++++++ 2 files changed, 131 insertions(+) diff --git a/drivers/edac/edac_device.c b/drivers/edac/edac_device.c index 621dc2a5d034..e9229b5f8afe 100644 --- a/drivers/edac/edac_device.c +++ b/drivers/edac/edac_device.c @@ -570,3 +570,104 @@ void edac_device_handle_ue_count(struct edac_device_ctl_info *edac_dev, block ? block->name : "N/A", count, msg); } EXPORT_SYMBOL_GPL(edac_device_handle_ue_count); + +/* EDAC device feature */ +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->dev.groups); + kfree(ctx); +} + +const struct device_type edac_dev_type = { + .name = "edac_dev", + .release = edac_dev_release, +}; + +static void edac_dev_unreg(void *data) +{ + device_unregister(data); +} + +/** + * edac_dev_register - register device for RAS features with EDAC + * @parent: parent device. + * @name: parent 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. + * + * Return: + * * %0 - Success. + * * %-EINVAL - Invalid parameters passed. + * * %-ENOMEM - Dynamic memory allocation failed. + * + */ +int edac_dev_register(struct device *parent, char *name, + void *private, int num_features, + const struct edac_dev_feature *ras_features) +{ + const struct attribute_group **ras_attr_groups; + struct edac_dev_feat_ctx *ctx; + int attr_gcnt = 0; + int ret, feat; + + if (!parent || !name || !num_features || !ras_features) + return -EINVAL; + + /* Double parse to make space for attributes */ + for (feat = 0; feat < num_features; feat++) { + switch (ras_features[feat].ft_type) { + /* Add feature specific code */ + default: + return -EINVAL; + } + } + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + 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->ft_type) { + /* Add feature specific code */ + default: + ret = -EINVAL; + goto groups_free; + } + } + + ctx->dev.parent = parent; + ctx->dev.bus = edac_get_sysfs_subsys(); + ctx->dev.type = &edac_dev_type; + ctx->dev.groups = ras_attr_groups; + ctx->private = private; + 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); + return ret; + } + + return devm_add_action_or_reset(parent, edac_dev_unreg, &ctx->dev); + +groups_free: + kfree(ras_attr_groups); +ctx_free: + kfree(ctx); + return ret; +} +EXPORT_SYMBOL_GPL(edac_dev_register); diff --git a/include/linux/edac.h b/include/linux/edac.h index b4ee8961e623..e19706311ec0 100644 --- a/include/linux/edac.h +++ b/include/linux/edac.h @@ -661,4 +661,34 @@ static inline struct dimm_info *edac_get_dimm(struct mem_ctl_info *mci, return mci->dimms[index]; } + +/* EDAC device features */ + +#define EDAC_FEAT_NAME_LEN 128 + +/* RAS feature type */ +enum edac_dev_feat { + RAS_FEAT_MAX +}; + +/* EDAC device feature information structure */ +struct edac_dev_data { + u8 instance; + void *private; +}; + +struct edac_dev_feat_ctx { + struct device dev; + void *private; +}; + +struct edac_dev_feature { + enum edac_dev_feat ft_type; + u8 instance; + void *ctx; +}; + +int edac_dev_register(struct device *parent, char *dev_name, + void *parent_pvt_data, int num_features, + const struct edac_dev_feature *ras_features); #endif /* _LINUX_EDAC_H_ */