From patchwork Thu Jan 27 21:29:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Widawsky X-Patchwork-Id: 12727428 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 A6E12C433FE for ; Thu, 27 Jan 2022 21:29:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230374AbiA0V3g (ORCPT ); Thu, 27 Jan 2022 16:29:36 -0500 Received: from mga03.intel.com ([134.134.136.65]:30536 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229610AbiA0V3g (ORCPT ); Thu, 27 Jan 2022 16:29:36 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643318976; x=1674854976; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=t4zZwTnokNlqXGMfgu29KqGrhR4jjOjQZrlpar9zdDQ=; b=mBLhF2zvUSyXyKg5heW27kElKahjapiOTT2jdIyqqfG40Ain+t7x6wG4 f0dFuxkVjY6rHn8uSfH+eoYEaZdbUgCq9q5966IscqGQT1MLNz6cRhJDr 3x4ypflqjZ44Nt0VflJTZVDAkue+MeKhvVAoJ/DV+DdTQJxfRHHe2MusO FxWy3PPucGUf28dF5YlHfKMf+6xCXrwxcaWML7SbwgEKLHPlex07SraSe 6iKDnEe3Ep6UfW0zRyoACrzP5CPUIoriqR71JYpEYoapf0gfOc6A9xie9 kmWOylLtR+ZdvrqwdBNFJ3AVtbQKBjWm1WY6JomjkFWj0VLnTaClUw/XB g==; X-IronPort-AV: E=McAfee;i="6200,9189,10239"; a="246914535" X-IronPort-AV: E=Sophos;i="5.88,321,1635231600"; d="scan'208";a="246914535" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jan 2022 13:29:33 -0800 X-IronPort-AV: E=Sophos;i="5.88,321,1635231600"; d="scan'208";a="521402190" Received: from vrao2-mobl1.gar.corp.intel.com (HELO localhost.localdomain) ([10.252.129.6]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jan 2022 13:29:32 -0800 From: Ben Widawsky To: linux-cxl@vger.kernel.org Cc: patches@lists.linux.dev, Ben Widawsky , Alison Schofield , Dan Williams , Ira Weiny , Jonathan Cameron , Vishal Verma Subject: [PATCH 2/4] cxl/core: Add more decoder attributes to sysfs Date: Thu, 27 Jan 2022 13:29:09 -0800 Message-Id: <20220127212911.127741-3-ben.widawsky@intel.com> X-Mailer: git-send-email 2.35.0 In-Reply-To: <20220127212911.127741-1-ben.widawsky@intel.com> References: <20220127212911.127741-1-ben.widawsky@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org The decoder attributes are consumed by userspace in order to program and verify the CXL topology. An example of the new attributes is with x1 and 8192 granularity: archlinux ~ # cat /sys/bus/cxl/devices/decoder0.0/interleave_{ways,granularity} 1 8192 Signed-off-by: Ben Widawsky --- drivers/cxl/core/port.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c index f49783d8c845..631dec0fa79e 100644 --- a/drivers/cxl/core/port.c +++ b/drivers/cxl/core/port.c @@ -99,6 +99,25 @@ static ssize_t size_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(size); +static ssize_t interleave_ways_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct cxl_decoder *cxld = to_cxl_decoder(dev); + + return sysfs_emit(buf, "%d\n", cxld->interleave_ways); +} +static DEVICE_ATTR_RO(interleave_ways); + +static ssize_t interleave_granularity_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct cxl_decoder *cxld = to_cxl_decoder(dev); + + return sysfs_emit(buf, "%d\n", cxld->interleave_granularity); +} +static DEVICE_ATTR_RO(interleave_granularity); + #define CXL_DECODER_FLAG_ATTR(name, flag) \ static ssize_t name##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ @@ -186,6 +205,8 @@ static struct attribute *cxl_decoder_base_attrs[] = { &dev_attr_start.attr, &dev_attr_size.attr, &dev_attr_locked.attr, + &dev_attr_interleave_ways.attr, + &dev_attr_interleave_granularity.attr, NULL, };