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nvme/pci: Provide SR-IOV support 

This registers an sr-iov callback for nvme.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch 2016-06-20 09:41:06 -06:00 committed by Jens Axboe
parent fa9a89fc66
commit 13880f5b57
1 changed files with 19 additions and 0 deletions
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19
drivers/nvme/host/pci.c
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@ -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,
};