From patchwork Mon Oct 28 17:40:44 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ilpo_J=C3=A4rvinen?= X-Patchwork-Id: 13853763 X-Patchwork-Delegate: kw@linux.com Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) (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 C555C1DF998; Mon, 28 Oct 2024 17:41:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.15 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730137264; cv=none; b=g9OIYRh3s7KNQWLsoj/toabIk5pNYnNfZp6HrcmSPuqHZ6YxjMYRjI4W6MoBr1ACdRLWTyZPxqvuwbLxxRFNvHhRlpk3W/p/eE7vd8Rq4RiMjvXUgXHP44Qq7Dhg/qvId/233KklM5R3u6VY+wVHIp2lXEnEXPmVAptUeF7CEC4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730137264; c=relaxed/simple; bh=0NZy39BfjUh2rWKkQukilOTO2WhZ2KItYCoVK7C3ORw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=l61KrFYYdaSJujDvlpvZccHCZY5n00AX5q1HZ7fZC7d7dlv6+gxSj9+CvHHxSynhLdL8MKu3LRrALK6gmiIuv/6CU3RnwR26LXl96TGxh3x6FnFPJNeWnbsgQAW727LEpUZbc2H4g6J416XhMEluZLapezid+1T6IKFEZgU3TWs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=d3xtsFtl; arc=none smtp.client-ip=198.175.65.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="d3xtsFtl" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1730137262; x=1761673262; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=0NZy39BfjUh2rWKkQukilOTO2WhZ2KItYCoVK7C3ORw=; b=d3xtsFtlT0pZXNjH8hYjw0MeciHZRAHNiUcg7e/koThICUblcCZLKoky gVo8k2C6yvSk/cUXxvBSUz+y69kRdVCvg30MEqV5wNRkt6i7sPR4D/W43 fnxTDoOkF+prz/3dG45YTgsjl7UNZqFATqGMZM4cG31fqIjIgi38QKLq3 RkuiR6ebkk+aYVGh/cMt+dWgbVYkJWWCH/DiHW1SJq1rH8gyab+Pd/XKP 0aTNfkbieBSWLWzCNn2kx4L+0XM8cyfzPuvgZVJSV9BpH9HUX6y3bRPN0 IBdm3oWbcQclPxA3g0tD3OXUnUsl5zJ3BvRFhGV7g/cRJXbouXWjXo7OH g==; X-CSE-ConnectionGUID: ooZCepYFRnypHI0TvWKGbQ== X-CSE-MsgGUID: ZlX+eJKkQ7ijNJmd3/G1Ug== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="33440548" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="33440548" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Oct 2024 10:41:02 -0700 X-CSE-ConnectionGUID: cY9LakQjR9KmUDRxzL/TMw== X-CSE-MsgGUID: vTBi5yglQBqF8s4ZBfnaig== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,239,1725346800"; d="scan'208";a="105015005" Received: from ijarvine-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.245.203]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Oct 2024 10:40:59 -0700 From: =?utf-8?q?Ilpo_J=C3=A4rvinen?= To: Bjorn Helgaas , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Cc: =?utf-8?q?Ilpo_J=C3=A4rvinen?= Subject: [PATCH 1/3] PCI/sysfs: Move reset related sysfs code to correct file Date: Mon, 28 Oct 2024 19:40:44 +0200 Message-Id: <20241028174046.1736-2-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241028174046.1736-1-ilpo.jarvinen@linux.intel.com> References: <20241028174046.1736-1-ilpo.jarvinen@linux.intel.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Most PCI sysfs code and structs are in a dedicated file but a few reset related things remain in pci.c. Move also them to pci-sysfs.c and drop pci_dev_reset_method_attr_is_visible() as it is 100% duplicate of pci_dev_reset_attr_is_visible(). Signed-off-by: Ilpo Järvinen --- drivers/pci/pci-sysfs.c | 112 +++++++++++++++++++++++++++++++++++ drivers/pci/pci.c | 125 +--------------------------------------- drivers/pci/pci.h | 3 +- 3 files changed, 114 insertions(+), 126 deletions(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 5d0f4db1cab7..507478082454 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -1391,6 +1391,118 @@ static const struct attribute_group pci_dev_reset_attr_group = { .is_visible = pci_dev_reset_attr_is_visible, }; +static ssize_t reset_method_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + ssize_t len = 0; + int i, m; + + for (i = 0; i < PCI_NUM_RESET_METHODS; i++) { + m = pdev->reset_methods[i]; + if (!m) + break; + + len += sysfs_emit_at(buf, len, "%s%s", len ? " " : "", + pci_reset_fn_methods[m].name); + } + + if (len) + len += sysfs_emit_at(buf, len, "\n"); + + return len; +} + +static int reset_method_lookup(const char *name) +{ + int m; + + for (m = 1; m < PCI_NUM_RESET_METHODS; m++) { + if (sysfs_streq(name, pci_reset_fn_methods[m].name)) + return m; + } + + return 0; /* not found */ +} + +static ssize_t reset_method_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct pci_dev *pdev = to_pci_dev(dev); + char *options, *tmp_options, *name; + int m, n; + u8 reset_methods[PCI_NUM_RESET_METHODS] = { 0 }; + + if (sysfs_streq(buf, "")) { + pdev->reset_methods[0] = 0; + pci_warn(pdev, "All device reset methods disabled by user"); + return count; + } + + if (sysfs_streq(buf, "default")) { + pci_init_reset_methods(pdev); + return count; + } + + options = kstrndup(buf, count, GFP_KERNEL); + if (!options) + return -ENOMEM; + + n = 0; + tmp_options = options; + while ((name = strsep(&tmp_options, " ")) != NULL) { + if (sysfs_streq(name, "")) + continue; + + name = strim(name); + + m = reset_method_lookup(name); + if (!m) { + pci_err(pdev, "Invalid reset method '%s'", name); + goto error; + } + + if (pci_reset_fn_methods[m].reset_fn(pdev, PCI_RESET_PROBE)) { + pci_err(pdev, "Unsupported reset method '%s'", name); + goto error; + } + + if (n == PCI_NUM_RESET_METHODS - 1) { + pci_err(pdev, "Too many reset methods\n"); + goto error; + } + + reset_methods[n++] = m; + } + + reset_methods[n] = 0; + + /* Warn if dev-specific supported but not highest priority */ + if (pci_reset_fn_methods[1].reset_fn(pdev, PCI_RESET_PROBE) == 0 && + reset_methods[0] != 1) + pci_warn(pdev, "Device-specific reset disabled/de-prioritized by user"); + memcpy(pdev->reset_methods, reset_methods, sizeof(pdev->reset_methods)); + kfree(options); + return count; + +error: + /* Leave previous methods unchanged */ + kfree(options); + return -EINVAL; +} +static DEVICE_ATTR_RW(reset_method); + +static struct attribute *pci_dev_reset_method_attrs[] = { + &dev_attr_reset_method.attr, + NULL, +}; + +static const struct attribute_group pci_dev_reset_method_attr_group = { + .attrs = pci_dev_reset_method_attrs, + .is_visible = pci_dev_reset_attr_is_visible, +}; + static ssize_t __resource_resize_show(struct device *dev, int n, char *buf) { struct pci_dev *pdev = to_pci_dev(dev); diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 0e6562ff3dcf..17831b7d9531 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -5194,7 +5194,7 @@ static void pci_dev_restore(struct pci_dev *dev) } /* dev->reset_methods[] is a 0-terminated list of indices into this array */ -static const struct pci_reset_fn_method pci_reset_fn_methods[] = { +const struct pci_reset_fn_method pci_reset_fn_methods[] = { { }, { pci_dev_specific_reset, .name = "device_specific" }, { pci_dev_acpi_reset, .name = "acpi" }, @@ -5205,129 +5205,6 @@ static const struct pci_reset_fn_method pci_reset_fn_methods[] = { { cxl_reset_bus_function, .name = "cxl_bus" }, }; -static ssize_t reset_method_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct pci_dev *pdev = to_pci_dev(dev); - ssize_t len = 0; - int i, m; - - for (i = 0; i < PCI_NUM_RESET_METHODS; i++) { - m = pdev->reset_methods[i]; - if (!m) - break; - - len += sysfs_emit_at(buf, len, "%s%s", len ? " " : "", - pci_reset_fn_methods[m].name); - } - - if (len) - len += sysfs_emit_at(buf, len, "\n"); - - return len; -} - -static int reset_method_lookup(const char *name) -{ - int m; - - for (m = 1; m < PCI_NUM_RESET_METHODS; m++) { - if (sysfs_streq(name, pci_reset_fn_methods[m].name)) - return m; - } - - return 0; /* not found */ -} - -static ssize_t reset_method_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct pci_dev *pdev = to_pci_dev(dev); - char *options, *tmp_options, *name; - int m, n; - u8 reset_methods[PCI_NUM_RESET_METHODS] = { 0 }; - - if (sysfs_streq(buf, "")) { - pdev->reset_methods[0] = 0; - pci_warn(pdev, "All device reset methods disabled by user"); - return count; - } - - if (sysfs_streq(buf, "default")) { - pci_init_reset_methods(pdev); - return count; - } - - options = kstrndup(buf, count, GFP_KERNEL); - if (!options) - return -ENOMEM; - - n = 0; - tmp_options = options; - while ((name = strsep(&tmp_options, " ")) != NULL) { - if (sysfs_streq(name, "")) - continue; - - name = strim(name); - - m = reset_method_lookup(name); - if (!m) { - pci_err(pdev, "Invalid reset method '%s'", name); - goto error; - } - - if (pci_reset_fn_methods[m].reset_fn(pdev, PCI_RESET_PROBE)) { - pci_err(pdev, "Unsupported reset method '%s'", name); - goto error; - } - - if (n == PCI_NUM_RESET_METHODS - 1) { - pci_err(pdev, "Too many reset methods\n"); - goto error; - } - - reset_methods[n++] = m; - } - - reset_methods[n] = 0; - - /* Warn if dev-specific supported but not highest priority */ - if (pci_reset_fn_methods[1].reset_fn(pdev, PCI_RESET_PROBE) == 0 && - reset_methods[0] != 1) - pci_warn(pdev, "Device-specific reset disabled/de-prioritized by user"); - memcpy(pdev->reset_methods, reset_methods, sizeof(pdev->reset_methods)); - kfree(options); - return count; - -error: - /* Leave previous methods unchanged */ - kfree(options); - return -EINVAL; -} -static DEVICE_ATTR_RW(reset_method); - -static struct attribute *pci_dev_reset_method_attrs[] = { - &dev_attr_reset_method.attr, - NULL, -}; - -static umode_t pci_dev_reset_method_attr_is_visible(struct kobject *kobj, - struct attribute *a, int n) -{ - struct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj)); - - if (!pci_reset_supported(pdev)) - return 0; - - return a->mode; -} - -const struct attribute_group pci_dev_reset_method_attr_group = { - .attrs = pci_dev_reset_method_attrs, - .is_visible = pci_dev_reset_method_attr_is_visible, -}; - /** * __pci_reset_function_locked - reset a PCI device function while holding * the @dev mutex lock. diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 14d00ce45bfa..e65dcc8e4832 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -702,6 +702,7 @@ struct pci_reset_fn_method { int (*reset_fn)(struct pci_dev *pdev, bool probe); char *name; }; +extern const struct pci_reset_fn_method pci_reset_fn_methods[]; #ifdef CONFIG_PCI_QUIRKS int pci_dev_specific_reset(struct pci_dev *dev, bool probe); @@ -891,8 +892,6 @@ static inline pci_power_t acpi_pci_choose_state(struct pci_dev *pdev) extern const struct attribute_group aspm_ctrl_attr_group; #endif -extern const struct attribute_group pci_dev_reset_method_attr_group; - #ifdef CONFIG_X86_INTEL_MID bool pci_use_mid_pm(void); int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state); From patchwork Mon Oct 28 17:40:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ilpo_J=C3=A4rvinen?= X-Patchwork-Id: 13853764 X-Patchwork-Delegate: kw@linux.com Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) (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 81F0320103A; Mon, 28 Oct 2024 17:41:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.15 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730137270; cv=none; b=IkXzMJisemV64uyY7BzhCzSbPod/vFwUFdpyg8ovf1wE5pXfn7E1wQ6KaHlz4accfl7wmsKtxYtTuezb28J+5GI8/A1P17SfYpyBZa3U5lrPyHvmv2n7WdCwATkkaI2yoLRQQCu7NZMQNbXPzKq2NZ9km0L30rGk+um/Tm5JW7c= ARC-Message-Signature: i=1; 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d="scan'208";a="105015026" Received: from ijarvine-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.245.203]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Oct 2024 10:41:06 -0700 From: =?utf-8?q?Ilpo_J=C3=A4rvinen?= To: Bjorn Helgaas , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Cc: =?utf-8?q?Ilpo_J=C3=A4rvinen?= Subject: [PATCH 2/3] PCI/sysfs: Use __free() in reset_method_store() Date: Mon, 28 Oct 2024 19:40:45 +0200 Message-Id: <20241028174046.1736-3-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241028174046.1736-1-ilpo.jarvinen@linux.intel.com> References: <20241028174046.1736-1-ilpo.jarvinen@linux.intel.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Use __free() from cleanup.h to handle freeing options in reset_method_store() as it simplifies the code flow. Signed-off-by: Ilpo Järvinen --- drivers/pci/pci-sysfs.c | 18 +++++++----------- 1 file changed, 7 insertions(+), 11 deletions(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 507478082454..74e4e0917898 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -13,6 +13,7 @@ */ #include +#include #include #include #include @@ -1430,7 +1431,7 @@ static ssize_t reset_method_store(struct device *dev, const char *buf, size_t count) { struct pci_dev *pdev = to_pci_dev(dev); - char *options, *tmp_options, *name; + char *tmp_options, *name; int m, n; u8 reset_methods[PCI_NUM_RESET_METHODS] = { 0 }; @@ -1445,7 +1446,7 @@ static ssize_t reset_method_store(struct device *dev, return count; } - options = kstrndup(buf, count, GFP_KERNEL); + char *options __free(kfree) = kstrndup(buf, count, GFP_KERNEL); if (!options) return -ENOMEM; @@ -1457,20 +1458,21 @@ static ssize_t reset_method_store(struct device *dev, name = strim(name); + /* Leave previous methods unchanged if input is invalid */ m = reset_method_lookup(name); if (!m) { pci_err(pdev, "Invalid reset method '%s'", name); - goto error; + return -EINVAL; } if (pci_reset_fn_methods[m].reset_fn(pdev, PCI_RESET_PROBE)) { pci_err(pdev, "Unsupported reset method '%s'", name); - goto error; + return -EINVAL; } if (n == PCI_NUM_RESET_METHODS - 1) { pci_err(pdev, "Too many reset methods\n"); - goto error; + return -EINVAL; } reset_methods[n++] = m; @@ -1483,13 +1485,7 @@ static ssize_t reset_method_store(struct device *dev, reset_methods[0] != 1) pci_warn(pdev, "Device-specific reset disabled/de-prioritized by user"); memcpy(pdev->reset_methods, reset_methods, sizeof(pdev->reset_methods)); - kfree(options); return count; - -error: - /* Leave previous methods unchanged */ - kfree(options); - return -EINVAL; } static DEVICE_ATTR_RW(reset_method); From patchwork Mon Oct 28 17:40:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ilpo_J=C3=A4rvinen?= X-Patchwork-Id: 13853765 X-Patchwork-Delegate: kw@linux.com Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) (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 5B6401DFDAA; 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X-CSE-ConnectionGUID: +fcSXBVJTO6GvvJBgr6HmQ== X-CSE-MsgGUID: DtKrlSs4STu+eEwQOjCaIQ== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="33440579" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="33440579" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Oct 2024 10:41:18 -0700 X-CSE-ConnectionGUID: 7bLXcGqfTEK8dvoZSnBbXA== X-CSE-MsgGUID: AQdj4EpOTIC7AvZKB/2FCg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,239,1725346800"; d="scan'208";a="105015063" Received: from ijarvine-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.245.203]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Oct 2024 10:41:16 -0700 From: =?utf-8?q?Ilpo_J=C3=A4rvinen?= To: Bjorn Helgaas , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Cc: =?utf-8?q?Ilpo_J=C3=A4rvinen?= Subject: [PATCH 3/3] PCI/sysfs: Remove unnecessary zero in initializer Date: Mon, 28 Oct 2024 19:40:46 +0200 Message-Id: <20241028174046.1736-4-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241028174046.1736-1-ilpo.jarvinen@linux.intel.com> References: <20241028174046.1736-1-ilpo.jarvinen@linux.intel.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Providing empty initializer for an array is enough to set its elements to zero. Thus, remove the redundant 0 from the initializer. Signed-off-by: Ilpo Järvinen --- drivers/pci/pci-sysfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 74e4e0917898..19da2f8e98e4 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -1433,7 +1433,7 @@ static ssize_t reset_method_store(struct device *dev, struct pci_dev *pdev = to_pci_dev(dev); char *tmp_options, *name; int m, n; - u8 reset_methods[PCI_NUM_RESET_METHODS] = { 0 }; + u8 reset_methods[PCI_NUM_RESET_METHODS] = {}; if (sysfs_streq(buf, "")) { pdev->reset_methods[0] = 0;