From patchwork Wed Feb 2 17:59:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: stuart hayes X-Patchwork-Id: 12733357 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AFB6BC433EF for ; Wed, 2 Feb 2022 17:59:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236968AbiBBR7d (ORCPT ); Wed, 2 Feb 2022 12:59:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34434 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232588AbiBBR7c (ORCPT ); Wed, 2 Feb 2022 12:59:32 -0500 Received: from mail-oi1-x235.google.com (mail-oi1-x235.google.com [IPv6:2607:f8b0:4864:20::235]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BBFD4C061714; Wed, 2 Feb 2022 09:59:32 -0800 (PST) Received: by mail-oi1-x235.google.com with SMTP id u13so24967241oie.5; Wed, 02 Feb 2022 09:59:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=IrMZ8DTfNXftcIuH/JIafJLHD56jMJEMaEBgBOw4SE8=; b=ne/42R/Ak5a4iLDs+HPWrTPyjapmF5y8WzOaiMj71WIX6ur6NQAGyPcTyWG0sDOTn9 2f0wBZhp0tscc0kpoSkq68dw8qfFaehsNvMGPJKbFKYP7+sGEdAjWImM1fZ9FqeXlulS 3VaFTLXcdu8rJZK7WTwHKCjlZoJzsVjP9S3YoI3akicRN/RyutP0RWnXfhIqE++dCR8s yJgzYDrd+T5CekS4cDT5w+gixpf7Oc255h7XpmlgoT8pzA7bxw9nrtJrWqxsnCs6uAPq k0T4f+Sv3EuSLdK9A8f1r4oQYcmI5iHcZxf3mklShyvR4047+CJrjgyOzxhpdZjre2yf fToA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=IrMZ8DTfNXftcIuH/JIafJLHD56jMJEMaEBgBOw4SE8=; b=NtBdu1hjo5ofXeTjppWpOl6FFDFkzI5guteYlv5NfbROm1bO4qCGlLtDBRZlk2T/jZ djLVv10mQzXvFDgIiYg7XMqIMnYd8+LZ2Sfztrjp9K+yE9Sw2lIjkBBjnspQGhMtJa3D JPcoUzO23droGIpbzELLn39Rrb3486jQH0Tq/Gg/S5cHWZ7CRCyfe7iPXMcGG0jvrBOv 7xbbdpxAfBEq+gdJLiktankzNCJ5Pl2CNqdl7+OtUGRxL7rqJeCWY+Vx9I7cepylNWGZ RmltYjmdbBQNkZjUxwjXy4gxaIGqwd5ltnxT72kX40n0XAvfnHFWwU30u+RZg2KKOfBx wixQ== X-Gm-Message-State: AOAM530vXZjxt+gYNC1sXubN+/HnddnXRbXt+K8+hgOhNTMgqhPNEGkn 8mG5uCVY6EkLdnU3RyqaxvA= X-Google-Smtp-Source: ABdhPJyFUZvpbQBEGwvD2bOTrBcQKEkvvh4LFU8bTJWIFTBG2Llh5lOnnsqQTlp+ILoGRt/5YLZimg== X-Received: by 2002:a05:6808:2182:: with SMTP id be2mr5294625oib.185.1643824772078; Wed, 02 Feb 2022 09:59:32 -0800 (PST) Received: from localhost.localdomain ([143.166.81.254]) by smtp.gmail.com with ESMTPSA id v10sm16122725oto.53.2022.02.02.09.59.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Feb 2022 09:59:31 -0800 (PST) From: Stuart Hayes To: Bjorn Helgaas , linux-pci@vger.kernel.org, Dan Williams Cc: Keith Busch , kw@linux.com, mariusz.tkaczyk@linux.intel.com, helgaas@kernel.org, lukas@wunner.de, pavel@ucw.cz, linux-cxl@vger.kernel.org, martin.petersen@oracle.com, James.Bottomley@hansenpartnership.com, Arnd Bergmann , Greg Kroah-Hartman , Stuart Hayes Subject: [RFC PATCH v2 1/3] Add support for seven more indicators in enclosure driver Date: Wed, 2 Feb 2022 11:59:11 -0600 Message-Id: X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org This patch adds support for seven additional indicators (ok, rebuild, prdfail, hotspare, ica, ifa, disabled) to the enclosure driver, which currently only supports three (fault, active, locate). It also reduces duplicated code for the set and show functions for the sysfs attributes for all of the indicators, and allows users of the driver to provide common get_led and set_led callbacks to control all indicators (though it continues to support the existing callbacks for the three currently supported indicators, so it does not require any changes to code that already uses the enclosure driver). This will be used by the pcie_em driver. Signed-off-by: Stuart Hayes --- .../ABI/testing/sysfs-class-enclosure | 14 ++ drivers/misc/enclosure.c | 191 +++++++++++------- include/linux/enclosure.h | 22 ++ 3 files changed, 149 insertions(+), 78 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-class-enclosure diff --git a/Documentation/ABI/testing/sysfs-class-enclosure b/Documentation/ABI/testing/sysfs-class-enclosure new file mode 100644 index 000000000000..25d91e42d768 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-enclosure @@ -0,0 +1,14 @@ +What: /sys/class/enclosure///rebuild +What: /sys/class/enclosure///disabled +What: /sys/class/enclosure///hotspare +What: /sys/class/enclosure///ica +What: /sys/class/enclosure///ifa +What: /sys/class/enclosure///ok +What: /sys/class/enclosure///prdfail +Date: February 2022 +Contact: Stuart Hayes +Description: + (RW) Get or set the indicator (1 is on, 0 is off) that + corresponds to the attribute name, for a component in an + enclosure. The "ica" and "ifa" states are "in critical + array" and "in failed array". diff --git a/drivers/misc/enclosure.c b/drivers/misc/enclosure.c index 1b010d9267c9..485d6a3c655b 100644 --- a/drivers/misc/enclosure.c +++ b/drivers/misc/enclosure.c @@ -473,30 +473,6 @@ static const char *const enclosure_type[] = { [ENCLOSURE_COMPONENT_ARRAY_DEVICE] = "array device", }; -static ssize_t get_component_fault(struct device *cdev, - struct device_attribute *attr, char *buf) -{ - struct enclosure_device *edev = to_enclosure_device(cdev->parent); - struct enclosure_component *ecomp = to_enclosure_component(cdev); - - if (edev->cb->get_fault) - edev->cb->get_fault(edev, ecomp); - return sysfs_emit(buf, "%d\n", ecomp->fault); -} - -static ssize_t set_component_fault(struct device *cdev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct enclosure_device *edev = to_enclosure_device(cdev->parent); - struct enclosure_component *ecomp = to_enclosure_component(cdev); - int val = simple_strtoul(buf, NULL, 0); - - if (edev->cb->set_fault) - edev->cb->set_fault(edev, ecomp, val); - return count; -} - static ssize_t get_component_status(struct device *cdev, struct device_attribute *attr,char *buf) { @@ -531,54 +507,6 @@ static ssize_t set_component_status(struct device *cdev, return -EINVAL; } -static ssize_t get_component_active(struct device *cdev, - struct device_attribute *attr, char *buf) -{ - struct enclosure_device *edev = to_enclosure_device(cdev->parent); - struct enclosure_component *ecomp = to_enclosure_component(cdev); - - if (edev->cb->get_active) - edev->cb->get_active(edev, ecomp); - return sysfs_emit(buf, "%d\n", ecomp->active); -} - -static ssize_t set_component_active(struct device *cdev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct enclosure_device *edev = to_enclosure_device(cdev->parent); - struct enclosure_component *ecomp = to_enclosure_component(cdev); - int val = simple_strtoul(buf, NULL, 0); - - if (edev->cb->set_active) - edev->cb->set_active(edev, ecomp, val); - return count; -} - -static ssize_t get_component_locate(struct device *cdev, - struct device_attribute *attr, char *buf) -{ - struct enclosure_device *edev = to_enclosure_device(cdev->parent); - struct enclosure_component *ecomp = to_enclosure_component(cdev); - - if (edev->cb->get_locate) - edev->cb->get_locate(edev, ecomp); - return sysfs_emit(buf, "%d\n", ecomp->locate); -} - -static ssize_t set_component_locate(struct device *cdev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct enclosure_device *edev = to_enclosure_device(cdev->parent); - struct enclosure_component *ecomp = to_enclosure_component(cdev); - int val = simple_strtoul(buf, NULL, 0); - - if (edev->cb->set_locate) - edev->cb->set_locate(edev, ecomp, val); - return count; -} - static ssize_t get_component_power_status(struct device *cdev, struct device_attribute *attr, char *buf) @@ -641,29 +569,136 @@ static ssize_t get_component_slot(struct device *cdev, return sysfs_emit(buf, "%d\n", slot); } -static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault, - set_component_fault); +/* + * callbacks for attrs using enum enclosure_component_setting (LEDs) + */ +static ssize_t led_show(struct device *cdev, + enum enclosure_component_led led, + char *buf) +{ + struct enclosure_device *edev = to_enclosure_device(cdev->parent); + struct enclosure_component *ecomp = to_enclosure_component(cdev); + + if (edev->cb->get_led) + edev->cb->get_led(edev, ecomp, led); + else + /* + * support old callbacks for fault/active/locate + */ + switch (led) { + case ENCLOSURE_LED_FAULT: + if (edev->cb->get_fault) { + edev->cb->get_fault(edev, ecomp); + ecomp->led[led] = ecomp->fault; + } + break; + case ENCLOSURE_LED_ACTIVE: + if (edev->cb->get_active) { + edev->cb->get_active(edev, ecomp); + ecomp->led[led] = ecomp->active; + } + break; + case ENCLOSURE_LED_LOCATE: + if (edev->cb->get_locate) { + edev->cb->get_locate(edev, ecomp); + ecomp->led[led] = ecomp->locate; + } + break; + default: + break; + } + + return sysfs_emit(buf, "%d\n", ecomp->led[led]); +} + +static ssize_t led_set(struct device *cdev, + enum enclosure_component_led led, + const char *buf, size_t count) +{ + struct enclosure_device *edev = to_enclosure_device(cdev->parent); + struct enclosure_component *ecomp = to_enclosure_component(cdev); + int err, val; + + err = kstrtoint(buf, 0, &val); + if (err) + return err; + + if (edev->cb->set_led) + edev->cb->set_led(edev, ecomp, led, val); + else + /* + * support old callbacks for fault/active/locate + */ + switch (led) { + case ENCLOSURE_LED_FAULT: + if (edev->cb->set_fault) + edev->cb->set_fault(edev, ecomp, val); + break; + case ENCLOSURE_LED_ACTIVE: + if (edev->cb->set_active) + edev->cb->set_active(edev, ecomp, val); + break; + case ENCLOSURE_LED_LOCATE: + if (edev->cb->set_locate) + edev->cb->set_locate(edev, ecomp, val); + break; + default: + break; + } + + return count; +} + +#define LED_ATTR_RW(led_attr, led) \ +static ssize_t led_attr##_show(struct device *cdev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + return led_show(cdev, led, buf); \ +} \ +static ssize_t led_attr##_store(struct device *cdev, \ + struct device_attribute *attr, \ + const char *buf, size_t count) \ +{ \ + return led_set(cdev, led, buf, count); \ +} \ +static DEVICE_ATTR_RW(led_attr) + static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status, set_component_status); -static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active, - set_component_active); -static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate, - set_component_locate); static DEVICE_ATTR(power_status, S_IRUGO | S_IWUSR, get_component_power_status, set_component_power_status); static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL); static DEVICE_ATTR(slot, S_IRUGO, get_component_slot, NULL); +LED_ATTR_RW(fault, ENCLOSURE_LED_FAULT); +LED_ATTR_RW(active, ENCLOSURE_LED_ACTIVE); +LED_ATTR_RW(locate, ENCLOSURE_LED_LOCATE); +LED_ATTR_RW(ok, ENCLOSURE_LED_OK); +LED_ATTR_RW(rebuild, ENCLOSURE_LED_REBUILD); +LED_ATTR_RW(prdfail, ENCLOSURE_LED_PRDFAIL); +LED_ATTR_RW(hotspare, ENCLOSURE_LED_HOTSPARE); +LED_ATTR_RW(ica, ENCLOSURE_LED_ICA); +LED_ATTR_RW(ifa, ENCLOSURE_LED_IFA); +LED_ATTR_RW(disabled, ENCLOSURE_LED_DISABLED); static struct attribute *enclosure_component_attrs[] = { &dev_attr_fault.attr, &dev_attr_status.attr, &dev_attr_active.attr, &dev_attr_locate.attr, + &dev_attr_ok.attr, + &dev_attr_rebuild.attr, + &dev_attr_prdfail.attr, + &dev_attr_hotspare.attr, + &dev_attr_ica.attr, + &dev_attr_ifa.attr, + &dev_attr_disabled.attr, &dev_attr_power_status.attr, &dev_attr_type.attr, &dev_attr_slot.attr, NULL }; + ATTRIBUTE_GROUPS(enclosure_component); static int __init enclosure_init(void) diff --git a/include/linux/enclosure.h b/include/linux/enclosure.h index 1c630e2c2756..98dd0f05efb7 100644 --- a/include/linux/enclosure.h +++ b/include/linux/enclosure.h @@ -49,6 +49,20 @@ enum enclosure_component_setting { ENCLOSURE_SETTING_BLINK_B_OFF_ON = 7, }; +enum enclosure_component_led { + ENCLOSURE_LED_FAULT, + ENCLOSURE_LED_ACTIVE, + ENCLOSURE_LED_LOCATE, + ENCLOSURE_LED_OK, + ENCLOSURE_LED_REBUILD, + ENCLOSURE_LED_PRDFAIL, + ENCLOSURE_LED_HOTSPARE, + ENCLOSURE_LED_ICA, + ENCLOSURE_LED_IFA, + ENCLOSURE_LED_DISABLED, + ENCLOSURE_LED_MAX, +}; + struct enclosure_device; struct enclosure_component; struct enclosure_component_callbacks { @@ -72,6 +86,13 @@ struct enclosure_component_callbacks { int (*set_locate)(struct enclosure_device *, struct enclosure_component *, enum enclosure_component_setting); + void (*get_led)(struct enclosure_device *edev, + struct enclosure_component *ecomp, + enum enclosure_component_led); + int (*set_led)(struct enclosure_device *edev, + struct enclosure_component *ecomp, + enum enclosure_component_led, + enum enclosure_component_setting); void (*get_power_status)(struct enclosure_device *, struct enclosure_component *); int (*set_power_status)(struct enclosure_device *, @@ -90,6 +111,7 @@ struct enclosure_component { int fault; int active; int locate; + int led[ENCLOSURE_LED_MAX]; int slot; enum enclosure_status status; int power_status;