From a6b623e0e5787ba5ffd2a3c4448ff6d1eaa904a9 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Tue, 27 Oct 2009 23:47:53 +0000 Subject: [PATCH] igb: move vf init into a seperate function This patch moves VF initialization into a seperate function to help improve the readability of igb_probe. Signed-off-by: Alexander Duyck Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/igb/igb_main.c | 98 ++++++++++++++++++++++---------------- 1 file changed, 56 insertions(+), 42 deletions(-) diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index 91709272ae1f..54e8f02929d9 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -1409,46 +1409,6 @@ static int __devinit igb_probe(struct pci_dev *pdev, if (err) goto err_sw_init; -#ifdef CONFIG_PCI_IOV - /* since iov functionality isn't critical to base device function we - * can accept failure. If it fails we don't allow iov to be enabled */ - if (hw->mac.type == e1000_82576) { - /* 82576 supports a maximum of 7 VFs in addition to the PF */ - unsigned int num_vfs = (max_vfs > 7) ? 7 : max_vfs; - int i; - unsigned char mac_addr[ETH_ALEN]; - - if (num_vfs) { - adapter->vf_data = kcalloc(num_vfs, - sizeof(struct vf_data_storage), - GFP_KERNEL); - if (!adapter->vf_data) { - dev_err(&pdev->dev, - "Could not allocate VF private data - " - "IOV enable failed\n"); - } else { - err = pci_enable_sriov(pdev, num_vfs); - if (!err) { - adapter->vfs_allocated_count = num_vfs; - dev_info(&pdev->dev, - "%d vfs allocated\n", - num_vfs); - for (i = 0; - i < adapter->vfs_allocated_count; - i++) { - random_ether_addr(mac_addr); - igb_set_vf_mac(adapter, i, - mac_addr); - } - } else { - kfree(adapter->vf_data); - adapter->vf_data = NULL; - } - } - } - } - -#endif /* setup the private structure */ err = igb_sw_init(adapter); if (err) @@ -1771,6 +1731,54 @@ static void __devexit igb_remove(struct pci_dev *pdev) pci_disable_device(pdev); } +/** + * igb_probe_vfs - Initialize vf data storage and add VFs to pci config space + * @adapter: board private structure to initialize + * + * This function initializes the vf specific data storage and then attempts to + * allocate the VFs. The reason for ordering it this way is because it is much + * mor expensive time wise to disable SR-IOV than it is to allocate and free + * the memory for the VFs. + **/ +static void __devinit igb_probe_vfs(struct igb_adapter * adapter) +{ +#ifdef CONFIG_PCI_IOV + struct pci_dev *pdev = adapter->pdev; + + if (adapter->vfs_allocated_count > 7) + adapter->vfs_allocated_count = 7; + + if (adapter->vfs_allocated_count) { + adapter->vf_data = kcalloc(adapter->vfs_allocated_count, + sizeof(struct vf_data_storage), + GFP_KERNEL); + /* if allocation failed then we do not support SR-IOV */ + if (!adapter->vf_data) { + adapter->vfs_allocated_count = 0; + dev_err(&pdev->dev, "Unable to allocate memory for VF " + "Data Storage\n"); + } + } + + if (pci_enable_sriov(pdev, adapter->vfs_allocated_count)) { + kfree(adapter->vf_data); + adapter->vf_data = NULL; +#endif /* CONFIG_PCI_IOV */ + adapter->vfs_allocated_count = 0; +#ifdef CONFIG_PCI_IOV + } else { + unsigned char mac_addr[ETH_ALEN]; + int i; + dev_info(&pdev->dev, "%d vfs allocated\n", + adapter->vfs_allocated_count); + for (i = 0; i < adapter->vfs_allocated_count; i++) { + random_ether_addr(mac_addr); + igb_set_vf_mac(adapter, i, mac_addr); + } + } +#endif /* CONFIG_PCI_IOV */ +} + /** * igb_sw_init - Initialize general software structures (struct igb_adapter) * @adapter: board private structure to initialize @@ -1795,13 +1803,19 @@ static int __devinit igb_sw_init(struct igb_adapter *adapter) adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN; - /* This call may decrease the number of queues depending on - * interrupt mode. */ +#ifdef CONFIG_PCI_IOV + if (hw->mac.type == e1000_82576) + adapter->vfs_allocated_count = max_vfs; + +#endif /* CONFIG_PCI_IOV */ + /* This call may decrease the number of queues */ if (igb_init_interrupt_scheme(adapter)) { dev_err(&pdev->dev, "Unable to allocate memory for queues\n"); return -ENOMEM; } + igb_probe_vfs(adapter); + /* Explicitly disable IRQ since the NIC can be in any state. */ igb_irq_disable(adapter); -- 2.20.1