From patchwork Mon Feb 6 20:52:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13130591 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 DD03DC636D3 for ; Mon, 6 Feb 2023 20:52:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230415AbjBFUwL (ORCPT ); Mon, 6 Feb 2023 15:52:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49564 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230354AbjBFUwL (ORCPT ); Mon, 6 Feb 2023 15:52:11 -0500 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B363A2E825; Mon, 6 Feb 2023 12:52:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1675716727; x=1707252727; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=fbw0gfA3CV6zl+8Xhzyb5C6vwjJRzvTIToKyZi8GRJ8=; b=kPz8dQLcYlw1nLTMALh8ePtTx/1k9pYQ3GZSNh4zU9fd/95cuSRjMNYO F4mgIOOTc4BoA2v8AMcFZjZzBWkh+3onjKYSy28Jdn6ftFmarJ+z53h+0 fgqMX3sixbhRlmn6MawqwADRBboF2vC/dBOuhwb6oMjqF+1USKGNq0jZA yG6GzLCEAQ06qqPyAAK6q9EurOtHt4mpGfmxkv4atsUzfnFTKNjyf9Ph9 lvLhmsih2Q+hyhmZz6JbrpG+jMwLvOrMoXtvmyn++L1Zn0ryiZjKGpbZE Te4AQszL5Y4RKqvc7M8xCOPcrouQtGgJrFAURGgBb5Ez+QFpHshhS1HmB Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10613"; a="329328291" X-IronPort-AV: E=Sophos;i="5.97,276,1669104000"; d="scan'208";a="329328291" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Feb 2023 12:52:07 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10613"; a="809264138" X-IronPort-AV: E=Sophos;i="5.97,276,1669104000"; d="scan'208";a="809264138" Received: from djiang5-mobl3.amr.corp.intel.com (HELO djiang5-mobl3.local) ([10.212.111.195]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Feb 2023 12:52:07 -0800 Subject: [PATCH 18/18] cxl: Export sysfs attributes for device QTG IDs From: Dave Jiang To: linux-cxl@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org Cc: dan.j.williams@intel.com, ira.weiny@intel.com, vishal.l.verma@intel.com, alison.schofield@intel.com, rafael@kernel.org, bhelgaas@google.com, robert.moore@intel.com Date: Mon, 06 Feb 2023 13:52:05 -0700 Message-ID: <167571672370.587790.13206197631776290440.stgit@djiang5-mobl3.local> In-Reply-To: <167571650007.587790.10040913293130712882.stgit@djiang5-mobl3.local> References: <167571650007.587790.10040913293130712882.stgit@djiang5-mobl3.local> User-Agent: StGit/1.5 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Export qtg_id sysfs attributes for the respective ram and pmem DPA range of a CXL device. The QTG ID should show up as /sys/bus/cxl/devices/memX/pmem/qtg_id for pmem or as /sys/bus/cxl/devices/memX/ram/qtg_id for ram. Signed-off-by: Dave Jiang --- Documentation/ABI/testing/sysfs-bus-cxl | 15 +++++++++++++++ drivers/cxl/core/memdev.c | 26 ++++++++++++++++++++++++++ 2 files changed, 41 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-cxl b/Documentation/ABI/testing/sysfs-bus-cxl index 0932c2f6fbf4..8133a13e118d 100644 --- a/Documentation/ABI/testing/sysfs-bus-cxl +++ b/Documentation/ABI/testing/sysfs-bus-cxl @@ -27,6 +27,14 @@ Description: identically named field in the Identify Memory Device Output Payload in the CXL-2.0 specification. +What: /sys/bus/cxl/devices/memX/ram/qtg_id +Date: January, 2023 +KernelVersion: v6.3 +Contact: linux-cxl@vger.kernel.org +Description: + (RO) Shows calculated QoS Throttling Group ID for the + "Volatile Only Capacity" DPA range. + What: /sys/bus/cxl/devices/memX/pmem/size Date: December, 2020 @@ -37,6 +45,13 @@ Description: identically named field in the Identify Memory Device Output Payload in the CXL-2.0 specification. +What: /sys/bus/cxl/devices/memX/pmem/qtg_id +Date: January, 2023 +KernelVersion: v6.3 +Contact: linux-cxl@vger.kernel.org +Description: + (RO) Shows calculated QoS Throttling Group ID for the + "Persistent Only Capacity" DPA range. What: /sys/bus/cxl/devices/memX/serial Date: January, 2022 diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c index a74a93310d26..06f9ac929ef4 100644 --- a/drivers/cxl/core/memdev.c +++ b/drivers/cxl/core/memdev.c @@ -76,6 +76,18 @@ static ssize_t ram_size_show(struct device *dev, struct device_attribute *attr, static struct device_attribute dev_attr_ram_size = __ATTR(size, 0444, ram_size_show, NULL); +static ssize_t ram_qtg_id_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct cxl_memdev *cxlmd = to_cxl_memdev(dev); + struct cxl_dev_state *cxlds = cxlmd->cxlds; + + return sysfs_emit(buf, "%d\n", cxlds->ram_qtg_id); +} + +static struct device_attribute dev_attr_ram_qtg_id = + __ATTR(qtg_id, 0444, ram_qtg_id_show, NULL); + static ssize_t pmem_size_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -89,6 +101,18 @@ static ssize_t pmem_size_show(struct device *dev, struct device_attribute *attr, static struct device_attribute dev_attr_pmem_size = __ATTR(size, 0444, pmem_size_show, NULL); +static ssize_t pmem_qtg_id_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct cxl_memdev *cxlmd = to_cxl_memdev(dev); + struct cxl_dev_state *cxlds = cxlmd->cxlds; + + return sysfs_emit(buf, "%d\n", cxlds->pmem_qtg_id); +} + +static struct device_attribute dev_attr_pmem_qtg_id = + __ATTR(qtg_id, 0444, pmem_qtg_id_show, NULL); + static ssize_t serial_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -117,11 +141,13 @@ static struct attribute *cxl_memdev_attributes[] = { static struct attribute *cxl_memdev_pmem_attributes[] = { &dev_attr_pmem_size.attr, + &dev_attr_pmem_qtg_id.attr, NULL, }; static struct attribute *cxl_memdev_ram_attributes[] = { &dev_attr_ram_size.attr, + &dev_attr_ram_qtg_id.attr, NULL, };