From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Kirsher Subject: [net-next-2.6 PATCH 1/5] pci: Add SR-IOV convenience functions and macros Date: Sat, 30 Jan 2010 02:39:28 -0800 Message-ID: <20100130103842.26633.73429.stgit@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, gospo@redhat.com, Mitch Williams , Jeff Kirsher To: davem@davemloft.net Return-path: Received: from qmta14.westchester.pa.mail.comcast.net ([76.96.59.212]:38572 "EHLO qmta14.westchester.pa.mail.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751256Ab0A3Kjr (ORCPT ); Sat, 30 Jan 2010 05:39:47 -0500 Sender: netdev-owner@vger.kernel.org List-ID: From: Williams, Mitch A Add and export pci_num_vf to allow other subsystems to determine how many virtual function devices are associated with an SR-IOV physical function device. Add macros dev_is_pci, dev_is_ps, and dev_num_vf to make it easier for non-PCI specific code to determine SR-IOV capabilities. Signed-off-by: Mitch Williams Signed-off-by: Jeff Kirsher --- drivers/pci/iov.c | 15 +++++++++++++++ include/linux/pci.h | 8 ++++++++ 2 files changed, 23 insertions(+), 0 deletions(-) diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index b2a448e..3e5ab2b 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -706,6 +706,21 @@ irqreturn_t pci_sriov_migration(struct pci_dev *dev) } EXPORT_SYMBOL_GPL(pci_sriov_migration); +/** + * pci_num_vf - return number of VFs associated with a PF device_release_driver + * @dev: the PCI device + * + * Returns number of VFs, or 0 if SR-IOV is not enabled. + */ +int pci_num_vf(struct pci_dev *dev) +{ + if (!dev || !dev->is_physfn) + return 0; + else + return dev->sriov->nr_virtfn; +} +EXPORT_SYMBOL_GPL(pci_num_vf); + static int ats_alloc_one(struct pci_dev *dev, int ps) { int pos; diff --git a/include/linux/pci.h b/include/linux/pci.h index 174e539..db7706d 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -310,6 +310,9 @@ extern struct pci_dev *alloc_pci_dev(void); #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list) #define to_pci_dev(n) container_of(n, struct pci_dev, dev) #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL) +#define dev_is_pci(d) ((d)->bus == &pci_bus_type) +#define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false)) +#define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0)) static inline int pci_channel_offline(struct pci_dev *pdev) { @@ -1286,6 +1289,7 @@ void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar); extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn); extern void pci_disable_sriov(struct pci_dev *dev); extern irqreturn_t pci_sriov_migration(struct pci_dev *dev); +extern int pci_num_vf(struct pci_dev *dev); #else static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn) { @@ -1298,6 +1302,10 @@ static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev) { return IRQ_NONE; } +static inline int pci_num_vf(struct pci_dev *dev) +{ + return 0; +} #endif #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)