[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [SR-IOV driver example 2/3 resend] PF driver: integrate with SR-IOV core
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@xxxxxxxxxxxxxxxxxxxxx> Signed-off-by: Yu Zhao <yu.zhao@xxxxxxxxx> --- 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 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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