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net: mana: Add handler for sriov configure

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Add callback function for the pci_driver / sriov_configure.

It asks the NIC to provide certain number of VFs, or disable
VFs if the request is zero.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Link: https://patch.msgid.link/20260710192735.2921300-1-haiyangz@linux.microsoft.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Haiyang Zhang 2026-07-10 12:27:29 -07:00 committed by Paolo Abeni
parent 922cc43c62
commit ce6b4d3216
1 changed files with 24 additions and 0 deletions
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24
drivers/net/ethernet/microsoft/mana/gdma_main.c
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@ -2456,6 +2456,8 @@ static void mana_gd_remove(struct pci_dev *pdev)
{
struct gdma_context *gc = pci_get_drvdata(pdev);
pci_disable_sriov(pdev);
mana_rdma_remove(&gc->mana_ib);
mana_remove(&gc->mana, false);
@ -2525,6 +2527,27 @@ static void mana_gd_shutdown(struct pci_dev *pdev)
pci_disable_device(pdev);
}
static int mana_sriov_configure(struct pci_dev *pdev, int numvfs)
{
int err = 0;
dev_info(&pdev->dev, "Requested num VFs: %d\n", numvfs);
if (numvfs > 0) {
err = pci_enable_sriov(pdev, numvfs);
} else {
if (pci_vfs_assigned(pdev)) {
dev_warn(&pdev->dev,
"Cannot disable SR-IOV while VFs are assigned\n");
return -EPERM;
}
pci_disable_sriov(pdev);
}
return err ? err : numvfs;
}
static const struct pci_device_id mana_id_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_MICROSOFT, MANA_PF_DEVICE_ID) },
{ PCI_DEVICE(PCI_VENDOR_ID_MICROSOFT, MANA_PF2_DEVICE_ID) },
@ -2540,6 +2563,7 @@ static struct pci_driver mana_driver = {
.suspend = mana_gd_suspend,
.resume = mana_gd_resume,
.shutdown = mana_gd_shutdown,
.sriov_configure = mana_sriov_configure,
};
static int __init mana_driver_init(void)