From patchwork Tue Jul 10 15:54:15 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiang Liu X-Patchwork-Id: 170223 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 997F92C0200 for ; Wed, 11 Jul 2012 01:57:30 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756165Ab2GJP5C (ORCPT ); Tue, 10 Jul 2012 11:57:02 -0400 Received: from mail-gg0-f174.google.com ([209.85.161.174]:64056 "EHLO mail-gg0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753118Ab2GJP5A (ORCPT ); Tue, 10 Jul 2012 11:57:00 -0400 Received: by gglu4 with SMTP id u4so145060ggl.19 for ; Tue, 10 Jul 2012 08:56:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references :in-reply-to:references; bh=PJ8x5/I84rSb424N4zrmpRPI1PEc9VnoEBD0HaOdJlE=; b=fZLouvmFW7KML77BqDlaqT8BFpRuYl1kVy85uiUsVpGrZJkrkL7HX+x0MBEBXSFd6l Oa/u+IxCMVu4FxvRvuAjwWe5PD0MhC80C7TYObgXDVbAM9I27aYVsGmZ6f7/bfK/kCBZ U1tV8Fo0f4LKrP+tOhrpJhm9ItZXyI9n+oxP1CFzSMjG3GdD1QEBsQfXkW9G1VRS3HEI AiuqcHkUbV1FxxqGaTAF2Fn3am9FDY1ZuyEWLwvUr6wXdfE2FJzP3MLD+sKoEQSScmob fu1JExzv4RJHWvQ2BblHla5SxWu5P6Ig8tCcT2G9JbxS5mCHN9CnGb90lfteP0bRRL4q 4mDw== Received: by 10.66.77.7 with SMTP id o7mr44575855paw.37.1341935819277; Tue, 10 Jul 2012 08:56:59 -0700 (PDT) Received: from localhost.localdomain ([221.221.21.23]) by mx.google.com with ESMTPS id oq4sm3056662pbb.21.2012.07.10.08.56.50 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 10 Jul 2012 08:56:58 -0700 (PDT) From: Jiang Liu To: Bjorn Helgaas , Don Dutile Cc: Jiang Liu , Yinghai Lu , Taku Izumi , "Rafael J . Wysocki" , Kenji Kaneshige , Yijing Wang , Keping Chen , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Jiang Liu Subject: [RFC PATCH 14/14] qib/PCI: use PCIe cap access functions to simplify implementation Date: Tue, 10 Jul 2012 23:54:15 +0800 Message-Id: <1341935655-5381-15-git-send-email-jiang.liu@huawei.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1341935655-5381-1-git-send-email-jiang.liu@huawei.com> References: <1341935655-5381-1-git-send-email-jiang.liu@huawei.com> In-Reply-To: References: Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Jiang Liu Use PCIe cap access functions to simplify qib implementation. Signed-off-by: Jiang Liu Signed-off-by: Yijing Wang --- drivers/infiniband/hw/qib/qib_pcie.c | 34 ++++++++++++++-------------------- 1 file changed, 14 insertions(+), 20 deletions(-) diff --git a/drivers/infiniband/hw/qib/qib_pcie.c b/drivers/infiniband/hw/qib/qib_pcie.c index 790646e..3c30249 100644 --- a/drivers/infiniband/hw/qib/qib_pcie.c +++ b/drivers/infiniband/hw/qib/qib_pcie.c @@ -271,10 +271,9 @@ int qib_pcie_params(struct qib_devdata *dd, u32 minw, u32 *nent, struct qib_msix_entry *entry) { u16 linkstat, speed; - int pos = 0, pose, ret = 1; + int pos = 0, ret = 1; - pose = pci_pcie_cap(dd->pcidev); - if (!pose) { + if (!pci_is_pcie(dd->pcidev)) { qib_dev_err(dd, "Can't find PCI Express capability!\n"); /* set up something... */ dd->lbus_width = 1; @@ -296,7 +295,7 @@ int qib_pcie_params(struct qib_devdata *dd, u32 minw, u32 *nent, if (!pos) qib_enable_intx(dd->pcidev); - pci_read_config_word(dd->pcidev, pose + PCI_EXP_LNKSTA, &linkstat); + pci_pcie_cap_read_word(dd->pcidev, PCI_EXP_LNKSTA, &linkstat); /* * speed is bits 0-3, linkwidth is bits 4-8 * no defines for them in headers @@ -514,7 +513,6 @@ static int qib_tune_pcie_coalesce(struct qib_devdata *dd) { int r; struct pci_dev *parent; - int ppos; u16 devid; u32 mask, bits, val; @@ -527,8 +525,7 @@ static int qib_tune_pcie_coalesce(struct qib_devdata *dd) qib_devinfo(dd->pcidev, "Parent not root\n"); return 1; } - ppos = pci_pcie_cap(parent); - if (!ppos) + if (!pci_is_pcie(parent)) return 1; if (parent->vendor != 0x8086) return 1; @@ -585,7 +582,6 @@ static int qib_tune_pcie_caps(struct qib_devdata *dd) { int ret = 1; /* Assume the worst */ struct pci_dev *parent; - int ppos, epos; u16 pcaps, pctl, ecaps, ectl; int rc_sup, ep_sup; int rc_cur, ep_cur; @@ -596,17 +592,15 @@ static int qib_tune_pcie_caps(struct qib_devdata *dd) qib_devinfo(dd->pcidev, "Parent not root\n"); goto bail; } - ppos = pci_pcie_cap(parent); - if (ppos) { - pci_read_config_word(parent, ppos + PCI_EXP_DEVCAP, &pcaps); - pci_read_config_word(parent, ppos + PCI_EXP_DEVCTL, &pctl); + if (pci_is_pcie(parent)) { + pci_pcie_cap_read_word(parent, PCI_EXP_DEVCAP, &pcaps); + pci_pcie_cap_read_word(parent, PCI_EXP_DEVCTL, &pctl); } else goto bail; /* Find out supported and configured values for endpoint (us) */ - epos = pci_pcie_cap(dd->pcidev); - if (epos) { - pci_read_config_word(dd->pcidev, epos + PCI_EXP_DEVCAP, &ecaps); - pci_read_config_word(dd->pcidev, epos + PCI_EXP_DEVCTL, &ectl); + if (pci_is_pcie(dd->pcidev)) { + pci_pcie_cap_read_word(dd->pcidev, PCI_EXP_DEVCAP, &ecaps); + pci_pcie_cap_read_word(dd->pcidev, PCI_EXP_DEVCTL, &ectl); } else goto bail; ret = 0; @@ -627,14 +621,14 @@ static int qib_tune_pcie_caps(struct qib_devdata *dd) rc_cur = rc_sup; pctl = (pctl & ~PCI_EXP_DEVCTL_PAYLOAD) | val2fld(rc_cur, PCI_EXP_DEVCTL_PAYLOAD); - pci_write_config_word(parent, ppos + PCI_EXP_DEVCTL, pctl); + pci_pcie_cap_write_word(parent, PCI_EXP_DEVCTL, pctl); } /* If less than (allowed, supported), bump endpoint payload */ if (rc_sup > ep_cur) { ep_cur = rc_sup; ectl = (ectl & ~PCI_EXP_DEVCTL_PAYLOAD) | val2fld(ep_cur, PCI_EXP_DEVCTL_PAYLOAD); - pci_write_config_word(dd->pcidev, epos + PCI_EXP_DEVCTL, ectl); + pci_pcie_cap_write_word(dd->pcidev, PCI_EXP_DEVCTL, ectl); } /* @@ -652,13 +646,13 @@ static int qib_tune_pcie_caps(struct qib_devdata *dd) rc_cur = rc_sup; pctl = (pctl & ~PCI_EXP_DEVCTL_READRQ) | val2fld(rc_cur, PCI_EXP_DEVCTL_READRQ); - pci_write_config_word(parent, ppos + PCI_EXP_DEVCTL, pctl); + pci_pcie_cap_write_word(parent, PCI_EXP_DEVCTL, pctl); } if (rc_sup > ep_cur) { ep_cur = rc_sup; ectl = (ectl & ~PCI_EXP_DEVCTL_READRQ) | val2fld(ep_cur, PCI_EXP_DEVCTL_READRQ); - pci_write_config_word(dd->pcidev, epos + PCI_EXP_DEVCTL, ectl); + pci_pcie_cap_write_word(dd->pcidev, PCI_EXP_DEVCTL, ectl); } bail: return ret;