Commit 13880f5b authored by Keith Busch's avatar Keith Busch Committed by Jens Axboe
Browse files

nvme/pci: Provide SR-IOV support 



This registers an sr-iov callback for nvme.

Signed-off-by: default avatarKeith Busch <keith.busch@intel.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent fa9a89fc

drivers/nvme/host/pci.c

+19 −0
Original line number Diff line number Diff line
@@ -2015,6 +2015,24 @@ 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)

{
@@ -2117,6 +2135,7 @@ static struct pci_driver nvme_driver = { 
	.driver		= {

		.pm	= &nvme_dev_pm_ops,

	},

	.sriov_configure = nvme_pci_sriov_configure,

	.err_handler	= &nvme_err_handler,

};