From mboxrd@z Thu Jan 1 00:00:00 1970 From: keith.busch@intel.com (Keith Busch) Date: Mon, 20 Jun 2016 09:41:06 -0600 Subject: [PATCHv3] nvme/pci: Provide SR-IOV support Message-ID: <1466437266-25749-1-git-send-email-keith.busch@intel.com> This registers an sr-iov callback for nvme. Signed-off-by: Keith Busch --- v2 -> v3: Removed the pci dependency part, instead checking pci_vfs_assigned in nvme. drivers/nvme/host/pci.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index dc39924..6d33f77 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2008,6 +2008,24 @@ static void nvme_remove(struct pci_dev *pdev) nvme_put_ctrl(&dev->ctrl); } +static int nvme_pci_sriov_configure(struct pci_dev *pdev, int numvfs) +{ + int ret = 0; + + if (numvfs == 0) { + if (pci_vfs_assigned(pdev)) { + dev_warn(&pdev->dev, + "Cannot disable SR-IOV VFs while assigned\n"); + return -EPERM; + } + pci_disable_sriov(pdev); + return 0; + } + + ret = pci_enable_sriov(pdev, numvfs); + return ret ? ret : numvfs; +} + #ifdef CONFIG_PM_SLEEP static int nvme_suspend(struct device *dev) { @@ -2108,6 +2126,7 @@ static struct pci_driver nvme_driver = { .driver = { .pm = &nvme_dev_pm_ops, }, + .sriov_configure = nvme_pci_sriov_configure, .err_handler = &nvme_err_handler, }; -- 2.7.2