From patchwork Wed Mar 20 05:24:39 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Kannebley Tavares X-Patchwork-Id: 2305241 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 406E340AFD for ; Wed, 20 Mar 2013 05:25:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751436Ab3CTFZQ (ORCPT ); Wed, 20 Mar 2013 01:25:16 -0400 Received: from e24smtp04.br.ibm.com ([32.104.18.25]:50419 "EHLO e24smtp04.br.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754854Ab3CTFZP (ORCPT ); Wed, 20 Mar 2013 01:25:15 -0400 Received: from /spool/local by e24smtp04.br.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 20 Mar 2013 02:25:11 -0300 Received: from d24dlp02.br.ibm.com (9.18.248.206) by e24smtp04.br.ibm.com (10.172.0.140) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Wed, 20 Mar 2013 02:25:09 -0300 Received: from d24relay03.br.ibm.com (d24relay03.br.ibm.com [9.13.184.25]) by d24dlp02.br.ibm.com (Postfix) with ESMTP id 855431DC0066 for ; Wed, 20 Mar 2013 01:25:08 -0400 (EDT) Received: from d24av05.br.ibm.com (d24av05.br.ibm.com [9.18.232.44]) by d24relay03.br.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r2K5OOl622741134 for ; Wed, 20 Mar 2013 02:24:24 -0300 Received: from d24av05.br.ibm.com (loopback [127.0.0.1]) by d24av05.br.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r2K5P7Nu029778 for ; Wed, 20 Mar 2013 02:25:08 -0300 Received: from oc4135502304.ibm.com.com (pablocb.br.ibm.com [9.18.197.195] (may be forged)) by d24av05.br.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id r2K5OuvD029608; Wed, 20 Mar 2013 02:25:05 -0300 From: Lucas Kannebley Tavares To: linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, dri-devel@lists.freedesktop.org Cc: Lucas Kannebley Tavares , Bjorn Helgaas , David Airlie , Benjamin Herrenschmidt , Brian King , Thadeu Cascardo , Alex Deucher Subject: [PATCHv2 3/3] ppc64: implemented pcibios_get_speed_cap_mask Date: Wed, 20 Mar 2013 02:24:39 -0300 Message-Id: <1363757079-23550-4-git-send-email-lucaskt@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.4.4 In-Reply-To: <1363757079-23550-1-git-send-email-lucaskt@linux.vnet.ibm.com> References: <1363757079-23550-1-git-send-email-lucaskt@linux.vnet.ibm.com> X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13032005-8936-0000-0000-000009A5C44A Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Implementation of a architecture-specific pcibios_get_speed_cap_mask. This implementation detects bus capabilities based on OF ibm,pcie-link-speed-stats property. Signed-off-by: Lucas Kannebley Tavares --- arch/powerpc/platforms/pseries/pci.c | 35 ++++++++++++++++++++++++++++++++++ 1 files changed, 35 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c index 0b580f4..4da8deb 100644 --- a/arch/powerpc/platforms/pseries/pci.c +++ b/arch/powerpc/platforms/pseries/pci.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include @@ -108,3 +109,37 @@ static void fixup_winbond_82c105(struct pci_dev* dev) } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105, fixup_winbond_82c105); + +int pcibios_get_speed_cap_mask(struct pci_dev *dev, u32 *mask) +{ + struct device_node *dn, *pdn; + const uint32_t *pcie_link_speed_stats = NULL; + + *mask = 0; + dn = pci_bus_to_OF_node(dev->bus); + + /* Find nearest ibm,pcie-link-speed-stats, walking up the device tree */ + for (pdn = dn; pdn != NULL; pdn = pdn->parent) { + pcie_link_speed_stats = (const uint32_t *) of_get_property(pdn, + "ibm,pcie-link-speed-stats", NULL); + if (pcie_link_speed_stats != NULL) + break; + } + + if (pcie_link_speed_stats == NULL) { + dev_info(&dev->dev, "no ibm,pcie-link-speed-stats property\n"); + return -EINVAL; + } + + switch (pcie_link_speed_stats[0]) { + case 0x02: + *mask |= PCIE_SPEED_50; + case 0x01: + *mask |= PCIE_SPEED_25; + case 0x00: + default: + return -EINVAL; + } + + return 0; +}