enic: Add SRIOV support
This patch adds support to enable SRIOV on enic devices. Enic SRIOV VF's are dynamic vnics and will use the same driver code as dynamic vnics.
Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
Signed-off-by: Sujith Sankar <ssujith@cisco.com>
Signed-off-by: Christian Benvenuti <benve@cisco.com>
Signed-off-by: David Wang <dwang2@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index 19c9272..eced800 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -127,6 +127,11 @@
return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
}
+int enic_sriov_enabled(struct enic *enic)
+{
+ return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
+}
+
static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
{
return rq;
@@ -2240,6 +2245,9 @@
int using_dac = 0;
unsigned int i;
int err;
+#ifdef CONFIG_PCI_IOV
+ int pos = 0;
+#endif
/* Allocate net device structure and initialize. Private
* instance data is initialized to zero.
@@ -2331,13 +2339,32 @@
goto err_out_iounmap;
}
+#ifdef CONFIG_PCI_IOV
+ /* Get number of subvnics */
+ pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
+ if (pos) {
+ pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
+ (u16 *)&enic->num_vfs);
+ if (enic->num_vfs) {
+ err = pci_enable_sriov(pdev, enic->num_vfs);
+ if (err) {
+ dev_err(dev, "SRIOV enable failed, aborting."
+ " pci_enable_sriov() returned %d\n",
+ err);
+ goto err_out_vnic_unregister;
+ }
+ enic->priv_flags |= ENIC_SRIOV_ENABLED;
+ }
+ }
+
+#endif
/* Issue device open to get device in known state
*/
err = enic_dev_open(enic);
if (err) {
dev_err(dev, "vNIC dev open failed, aborting\n");
- goto err_out_vnic_unregister;
+ goto err_out_disable_sriov;
}
/* Setup devcmd lock
@@ -2404,6 +2431,12 @@
enic->port_mtu = enic->config.mtu;
(void)enic_change_mtu(netdev, enic->port_mtu);
+#ifdef CONFIG_PCI_IOV
+ if (enic_is_dynamic(enic) && pdev->is_virtfn &&
+ is_zero_ether_addr(enic->mac_addr))
+ random_ether_addr(enic->mac_addr);
+#endif
+
err = enic_set_mac_addr(netdev, enic->mac_addr);
if (err) {
dev_err(dev, "Invalid MAC address, aborting\n");
@@ -2455,8 +2488,15 @@
enic_dev_deinit(enic);
err_out_dev_close:
vnic_dev_close(enic->vdev);
+err_out_disable_sriov:
+#ifdef CONFIG_PCI_IOV
+ if (enic_sriov_enabled(enic)) {
+ pci_disable_sriov(pdev);
+ enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
+ }
err_out_vnic_unregister:
vnic_dev_unregister(enic->vdev);
+#endif
err_out_iounmap:
enic_iounmap(enic);
err_out_release_regions:
@@ -2482,6 +2522,12 @@
unregister_netdev(netdev);
enic_dev_deinit(enic);
vnic_dev_close(enic->vdev);
+#ifdef CONFIG_PCI_IOV
+ if (enic_sriov_enabled(enic)) {
+ pci_disable_sriov(pdev);
+ enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
+ }
+#endif
vnic_dev_unregister(enic->vdev);
enic_iounmap(enic);
pci_release_regions(pdev);