From patchwork Wed Sep 13 12:27:44 2023 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: 1833512 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=hlU6qkgP; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=patchwork.ozlabs.org) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by legolas.ozlabs.org (Postfix) with ESMTP id 4Rm0DL1q9mz1yh0 for ; Wed, 13 Sep 2023 22:30:58 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240627AbjIMMbA (ORCPT ); Wed, 13 Sep 2023 08:31:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46158 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240507AbjIMMav (ORCPT ); Wed, 13 Sep 2023 08:30:51 -0400 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D93619AD; Wed, 13 Sep 2023 05:30:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1694608247; x=1726144247; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lGsBT0uuTDOMajlNgJ3siJtE8uolW3uxhY8d88dRxik=; b=hlU6qkgP3pB5mUXJDy67iBLnatEEj6x8+/Koo7MXG3go6EQ0rgEWu3J7 vp4kuGiA2n5Sy+wdl73KdfWLg/Se+l/WWcFGJ4StsBa45WogMnqdRf9zN H4oq0yj2mw4qUUp6nGY9jWhiFGUFwKlekFAmkJ8pDpFPE7RtT/I1I5ycU b9YBwj+hlHUZRtWW5vS8uKD8gf9gAq9rWwuQSIMYRLMu2v/FOp2a7RBET NaljDv+TDVOuqx0oX8Y6d4e5qSYWD9sRkd/mPkBAdDGjKaWZqnKccQ0Oe ANybNPWBb5Gz9VO3rMZVTSfMSVE7BeWDOvpbwV/KiiEH+c6fWuJhsGLw4 A==; X-IronPort-AV: E=McAfee;i="6600,9927,10832"; a="368912521" X-IronPort-AV: E=Sophos;i="6.02,143,1688454000"; d="scan'208";a="368912521" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Sep 2023 05:28:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10832"; a="693836655" X-IronPort-AV: E=Sophos;i="6.02,143,1688454000"; d="scan'208";a="693836655" Received: from pakurapo-mobl3.ger.corp.intel.com (HELO ijarvine-mobl2.ger.corp.intel.com) ([10.249.45.213]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Sep 2023 05:28:22 -0700 From: =?utf-8?q?Ilpo_J=C3=A4rvinen?= To: Jonathan Cameron , linux-pci@vger.kernel.org, Bjorn Helgaas , Bjorn Helgaas , linux-kernel@vger.kernel.org Cc: =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Jonathan Cameron Subject: [PATCH v2 06/10] PCI: Use FIELD_GET() to extract Link Width Date: Wed, 13 Sep 2023 15:27:44 +0300 Message-Id: <20230913122748.29530-7-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230913122748.29530-1-ilpo.jarvinen@linux.intel.com> References: <20230913122748.29530-1-ilpo.jarvinen@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Use FIELD_GET() to extract PCIe Negotiated and Maximum Link Width fields instead of custom masking and shifting. Signed-off-by: Ilpo Järvinen Reviewed-by: Jonathan Cameron --- drivers/pci/pci-sysfs.c | 5 ++--- drivers/pci/pci.c | 6 +++--- 2 files changed, 5 insertions(+), 6 deletions(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index d9eede2dbc0e..5a6241044c3c 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -12,7 +12,7 @@ * Modeled after usb's driverfs.c */ - +#include #include #include #include @@ -230,8 +230,7 @@ static ssize_t current_link_width_show(struct device *dev, if (err) return -EINVAL; - return sysfs_emit(buf, "%u\n", - (linkstat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT); + return sysfs_emit(buf, "%u\n", FIELD_GET(PCI_EXP_LNKSTA_NLW, linkstat)); } static DEVICE_ATTR_RO(current_link_width); diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 59c01d68c6d5..a8adc34dc86f 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -9,6 +9,7 @@ */ #include +#include #include #include #include @@ -6257,8 +6258,7 @@ u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev, pcie_capability_read_word(dev, PCI_EXP_LNKSTA, &lnksta); next_speed = pcie_link_speed[lnksta & PCI_EXP_LNKSTA_CLS]; - next_width = (lnksta & PCI_EXP_LNKSTA_NLW) >> - PCI_EXP_LNKSTA_NLW_SHIFT; + next_width = FIELD_GET(PCI_EXP_LNKSTA_NLW, lnksta); next_bw = next_width * PCIE_SPEED2MBS_ENC(next_speed); @@ -6330,7 +6330,7 @@ enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev) pcie_capability_read_dword(dev, PCI_EXP_LNKCAP, &lnkcap); if (lnkcap) - return (lnkcap & PCI_EXP_LNKCAP_MLW) >> 4; + return FIELD_GET(PCI_EXP_LNKCAP_MLW, lnkcap); return PCIE_LNK_WIDTH_UNKNOWN; }