From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Kirsher Subject: [net-next-2.6 PATCH v3 1/5] pci: Add SR-IOV convenience functions and macros Date: Wed, 10 Feb 2010 03:43:04 -0800 Message-ID: <20100210114303.14483.71368.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 qmta04.emeryville.ca.mail.comcast.net ([76.96.30.40]:56387 "EHLO qmta04.emeryville.ca.mail.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753151Ab0BJLnW (ORCPT ); Wed, 10 Feb 2010 06:43:22 -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 | 11 +++++++++++ 2 files changed, 26 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..59a98e2 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -612,6 +612,9 @@ extern void pci_remove_bus_device(struct pci_dev *dev); extern void pci_stop_bus_device(struct pci_dev *dev); void pci_setup_cardbus(struct pci_bus *bus); extern void pci_sort_breadthfirst(void); +#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)) /* Generic PCI functions exported to card drivers */ @@ -1129,6 +1132,9 @@ static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus, unsigned int devfn) { return NULL; } +#define dev_is_pci(d) (false) +#define dev_is_pf(d) (false) +#define dev_num_vf(d) (0) #endif /* CONFIG_PCI */ /* Include architecture-dependent settings and functions */ @@ -1286,6 +1292,7 @@ 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 +1305,10 @@ 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)