[SR-IOV driver example 2/3 resend] PF driver: integrate with SR-IOV core

Yu Zhao
2008-12-02T05:38:54Z

This patch integrates the IGB driver with the SR-IOV core. It shows how
the SR-IOV API is used to support the capability. Obviously people does
not need to put much effort to integrate the PF driver with SR-IOV core.
All SR-IOV standard stuff are handled by SR-IOV core and PF driver only
concerns the device specific resource allocation and deallocation once it
gets the necessary information (i.e. number of Virtual Functions) from
the callback function.

From: Intel Corporation, LAN Access Division <e1000-devel@lists.sourceforge.net>
Signed-off-by: Yu Zhao <yu.zhao@intel.com>

---
drivers/net/igb/igb_main.c | 46 ++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 46 insertions(+), 0 deletions(-)

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index f0361ef..78bda11 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -138,6 +138,7 @@ void igb_set_mc_list_pools(struct igb_adapter *, struct e1000_hw *, int, u16);
static int igb_vmm_control(struct igb_adapter *, bool);
static int igb_set_vf_mac(struct net_device *, int, u8*);
static void igb_mbox_handler(struct igb_adapter *);
+static int igb_virtual(struct pci_dev *, int);

static int igb_suspend(struct pci_dev *, pm_message_t);
#ifdef CONFIG_PM
@@ -182,6 +183,7 @@ static struct pci_driver igb_driver = {
#endif
.shutdown = igb_shutdown,
.err_handler = &igb_err_handler,
+ .virtual = igb_virtual
};

static int global_quad_port_a; /* global quad port a indication */
@@ -5066,4 +5068,48 @@ void igb_set_mc_list_pools(struct igb_adapter *adapter,
wr32(E1000_VMOLR(pool), reg_data);
}

+static int
+igb_virtual(struct pci_dev *pdev, int nr_virtfn)
+{
+ int i;
+ struct net_device *netdev = pci_get_drvdata(pdev);
+ struct igb_adapter *adapter = netdev_priv(netdev);
+ /* the VFs' MAC addresses are hard-coded */
+ unsigned char my_mac_addr[6] = {0x00, 0xDE, 0xAD, 0xBE, 0xEF, 0xFF};
+
+ /*
+ * the 82576 NIC supports 1-PF NIC + 7-VF NICs mode and 8-VF NICs
+ * mode. In the 8-VF NICs mode, the PF can't tx/rx packets -- it
+ * only behaves as 'VF supervisor'. For now we use the 1-PF NIC +
+ * 7-VF NICs mode to preserve PF's tx/rx capability for the debug
+ * purpose.
+ */
+ if (nr_virtfn > (MAX_NUM_VFS - 1))
+ return -EINVAL;
+
+ if (nr_virtfn) {
+ dev_info(&pdev->dev, "SR-IOV is enabled\n");
+ /*
+ * Currently VFs resources are pre-allocated, so just set
+ * the MAC addresses of each VF here.
+ */
+ for (i = 0; i < nr_virtfn; i++) {
+ my_mac_addr[5] = (unsigned char)i;
+ igb_set_vf_mac(netdev, i, my_mac_addr);
+ igb_set_vf_vmolr(adapter, i);
+ }
+ } else {
+ /*
+ * Since we statically allocate tx/rx queues for the PF
+ * and the VFs, so we don't need to free any VF related
+ * resources here.
+ */
+ dev_info(&pdev->dev, "SR-IOV is disabled\n");
+ }
+
+ adapter->vfs_allocated_count = nr_virtfn;
+
+ return 0;
+}
+
/* igb_main.c */
--
1.5.6.4