From patchwork Wed Mar 27 08:56:02 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gavin Shan X-Patchwork-Id: 231612 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 8F0F22C00A7 for ; Wed, 27 Mar 2013 19:56:17 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751845Ab3C0I4Q (ORCPT ); Wed, 27 Mar 2013 04:56:16 -0400 Received: from e39.co.us.ibm.com ([32.97.110.160]:44489 "EHLO e39.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754463Ab3C0I4O (ORCPT ); Wed, 27 Mar 2013 04:56:14 -0400 Received: from /spool/local by e39.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 27 Mar 2013 02:56:11 -0600 Received: from d01relay06.pok.ibm.com (d01relay06.pok.ibm.com [9.56.227.116]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id D08466E8040 for ; Wed, 27 Mar 2013 04:56:07 -0400 (EDT) Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by d01relay06.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r2R8uAOP26411224 for ; Wed, 27 Mar 2013 04:56:10 -0400 Received: from d01av01.pok.ibm.com (loopback [127.0.0.1]) by d01av01.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r2R8u8nR014422 for ; Wed, 27 Mar 2013 04:56:09 -0400 Received: from shangw (shangw.cn.ibm.com [9.125.213.106]) by d01av01.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with SMTP id r2R8u7AM014339; Wed, 27 Mar 2013 04:56:07 -0400 Received: by shangw (Postfix, from userid 1000) id 130C33021C7; Wed, 27 Mar 2013 16:56:06 +0800 (CST) From: Gavin Shan To: linux-pci@vger.kernel.org Cc: bhelgaas@google.com, Gavin Shan Subject: [PATCH 2/4] PCI: Allow pci_msix_table_size() take MSIX cap struct Date: Wed, 27 Mar 2013 16:56:02 +0800 Message-Id: <1364374564-19096-3-git-send-email-shangw@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1364374564-19096-1-git-send-email-shangw@linux.vnet.ibm.com> References: <1364374564-19096-1-git-send-email-shangw@linux.vnet.ibm.com> X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13032708-3620-0000-0000-000001CA167B Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The patch introduces additional parameter to pci_msix_table_size() to allow it take the address of MSI-X capability structure. If that's zero, we need figure out the address from PCI config space. Signed-off-by: Gavin Shan --- drivers/pci/msi.c | 9 +++++---- drivers/pci/pcie/portdrv_core.c | 2 +- include/linux/pci.h | 4 ++-- 3 files changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 05e9604..7ba9461 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -917,13 +917,14 @@ EXPORT_SYMBOL(pci_disable_msi); /** * pci_msix_table_size - return the number of device's MSI-X table entries * @dev: pointer to the pci_dev data structure of MSI-X device function + * @pos: address of MSI-X capability structure */ -int pci_msix_table_size(struct pci_dev *dev) +int pci_msix_table_size(struct pci_dev *dev, int pos) { - int pos; u16 control; - pos = pci_find_capability(dev, PCI_CAP_ID_MSIX); + if (!pos) + pos = pci_find_capability(dev, PCI_CAP_ID_MSIX); if (!pos) return 0; @@ -958,7 +959,7 @@ int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec) if (status) return status; - nr_entries = pci_msix_table_size(dev); + nr_entries = pci_msix_table_size(dev, pos); if (nvec > nr_entries) return nr_entries; diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 31063ac..d9600f3 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -79,7 +79,7 @@ static int pcie_port_enable_msix(struct pci_dev *dev, int *vectors, int mask) u16 reg16; u32 reg32; - nr_entries = pci_msix_table_size(dev); + nr_entries = pci_msix_table_size(dev, 0); if (!nr_entries) return -EINVAL; if (nr_entries > PCIE_PORT_MAX_MSIX_ENTRIES) diff --git a/include/linux/pci.h b/include/linux/pci.h index 2461033a..1b7e7dc 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1116,7 +1116,7 @@ static inline void pci_msi_shutdown(struct pci_dev *dev) static inline void pci_disable_msi(struct pci_dev *dev) { } -static inline int pci_msix_table_size(struct pci_dev *dev) +static inline int pci_msix_table_size(struct pci_dev *dev, int pos) { return 0; } @@ -1145,7 +1145,7 @@ extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec); extern int pci_enable_msi_block_auto(struct pci_dev *dev, unsigned int *maxvec); extern void pci_msi_shutdown(struct pci_dev *dev); extern void pci_disable_msi(struct pci_dev *dev); -extern int pci_msix_table_size(struct pci_dev *dev); +extern int pci_msix_table_size(struct pci_dev *dev, int pos); extern int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec); extern void pci_msix_shutdown(struct pci_dev *dev);