From: Omer Khaliq Subject: [PATCH 1/2] PCI/IOV: Add function to allow Function Dependency Link override. Date: Fri, 19 Aug 2016 15:32:12 -0700 Message-ID: <1471645933-3643-2-git-send-email-okhaliq@caviumnetworks.com> References: <1471645933-3643-1-git-send-email-okhaliq@caviumnetworks.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Omer Khaliq To: , , , , , , , , Return-path: In-Reply-To: <1471645933-3643-1-git-send-email-okhaliq@caviumnetworks.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org From: David Daney Some hardware presents an incorrect SR-IOV Function Dependency Link, add a function to allow this to be overridden in the PF driver for such devices. Signed-off-by: David Daney Signed-off-by: Omer Khaliq --- drivers/pci/iov.c | 14 ++++++++++++++ include/linux/pci.h | 1 + 2 files changed, 15 insertions(+) diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index 2194b44..81f0672 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -640,6 +640,20 @@ int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn) EXPORT_SYMBOL_GPL(pci_enable_sriov); /** + * pci_sriov_fdl_override - fix incorrect Function Dependency Link + * @dev: the PCI device + * @fdl: the corrected Function Dependency Link value + * + * For hardware presenting an incorrect Function Dependency Link in + * the SR-IOV Extended Capability, allow a driver to override it. + */ +void pci_sriov_fdl_override(struct pci_dev *dev, u8 fdl) +{ + dev->sriov->link = fdl; +} +EXPORT_SYMBOL_GPL(pci_sriov_fdl_override); + +/** * pci_disable_sriov - disable the SR-IOV capability * @dev: the PCI device */ diff --git a/include/linux/pci.h b/include/linux/pci.h index 2599a98..da8a5b3 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1823,6 +1823,7 @@ int pci_num_vf(struct pci_dev *dev); int pci_vfs_assigned(struct pci_dev *dev); int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs); int pci_sriov_get_totalvfs(struct pci_dev *dev); +void pci_sriov_fdl_override(struct pci_dev *dev, u8 fdl); resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno); #else static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id) -- 1.9.1