diff options
author | Ingo Molnar <mingo@elte.hu> | 2009-06-07 12:22:15 +0200 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-06-07 12:22:15 +0200 |
commit | 5f4457a4f62cc9d78e04c0eb12ff0540899aad89 (patch) | |
tree | 0b973d527ea6b2ae31e08da0746b4965a3c5a6d8 /drivers/net/igb/igb_main.c | |
parent | 9b94b3a19b13e094c10f65f24bc358f6ffe4eacd (diff) | |
parent | b87297fb405ef13cac375f202d114323b076a56d (diff) |
Merge branch 'linus' into x86/cpu
Diffstat (limited to 'drivers/net/igb/igb_main.c')
-rw-r--r-- | drivers/net/igb/igb_main.c | 178 |
1 files changed, 66 insertions, 112 deletions
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index 6b0697c565b..e25343588fc 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -152,14 +152,13 @@ static struct notifier_block dca_notifier = { /* for netdump / net console */ static void igb_netpoll(struct net_device *); #endif - #ifdef CONFIG_PCI_IOV -static ssize_t igb_set_num_vfs(struct device *, struct device_attribute *, - const char *, size_t); -static ssize_t igb_show_num_vfs(struct device *, struct device_attribute *, - char *); -DEVICE_ATTR(num_vfs, S_IRUGO | S_IWUSR, igb_show_num_vfs, igb_set_num_vfs); -#endif +static unsigned int max_vfs = 0; +module_param(max_vfs, uint, 0); +MODULE_PARM_DESC(max_vfs, "Maximum number of virtual functions to allocate " + "per physical function"); +#endif /* CONFIG_PCI_IOV */ + static pci_ers_result_t igb_io_error_detected(struct pci_dev *, pci_channel_state_t); static pci_ers_result_t igb_io_slot_reset(struct pci_dev *); @@ -671,6 +670,21 @@ static void igb_set_interrupt_capability(struct igb_adapter *adapter) /* If we can't do MSI-X, try MSI */ msi_only: +#ifdef CONFIG_PCI_IOV + /* disable SR-IOV for non MSI-X configurations */ + if (adapter->vf_data) { + struct e1000_hw *hw = &adapter->hw; + /* disable iov and allow time for transactions to clear */ + pci_disable_sriov(adapter->pdev); + msleep(500); + + kfree(adapter->vf_data); + adapter->vf_data = NULL; + wr32(E1000_IOVCTL, E1000_IOVCTL_REUSE_VFQ); + msleep(100); + dev_info(&adapter->pdev->dev, "IOV Disabled\n"); + } +#endif adapter->num_rx_queues = 1; adapter->num_tx_queues = 1; if (!pci_enable_msi(adapter->pdev)) @@ -1238,6 +1252,46 @@ 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) @@ -1397,19 +1451,6 @@ static int __devinit igb_probe(struct pci_dev *pdev, if (err) goto err_register; -#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) { - err = pci_enable_sriov(pdev, 0); - if (!err) - err = device_create_file(&netdev->dev, - &dev_attr_num_vfs); - if (err) - dev_err(&pdev->dev, "Failed to initialize IOV\n"); - } - -#endif #ifdef CONFIG_IGB_DCA if (dca_add_requester(&pdev->dev) == 0) { adapter->flags |= IGB_FLAG_DCA_ENABLED; @@ -1965,7 +2006,7 @@ static void igb_setup_rctl(struct igb_adapter *adapter) struct e1000_hw *hw = &adapter->hw; u32 rctl; u32 srrctl = 0; - int i, j; + int i; rctl = rd32(E1000_RCTL); @@ -2030,8 +2071,6 @@ static void igb_setup_rctl(struct igb_adapter *adapter) if (adapter->vfs_allocated_count) { u32 vmolr; - j = adapter->rx_ring[0].reg_idx; - /* set all queue drop enable bits */ wr32(E1000_QDE, ALL_QUEUES); srrctl |= E1000_SRRCTL_DROP_EN; @@ -2039,16 +2078,16 @@ static void igb_setup_rctl(struct igb_adapter *adapter) /* disable queue 0 to prevent tail write w/o re-config */ wr32(E1000_RXDCTL(0), 0); - vmolr = rd32(E1000_VMOLR(j)); + vmolr = rd32(E1000_VMOLR(adapter->vfs_allocated_count)); if (rctl & E1000_RCTL_LPE) vmolr |= E1000_VMOLR_LPE; - if (adapter->num_rx_queues > 0) + if (adapter->num_rx_queues > 1) vmolr |= E1000_VMOLR_RSSE; - wr32(E1000_VMOLR(j), vmolr); + wr32(E1000_VMOLR(adapter->vfs_allocated_count), vmolr); } for (i = 0; i < adapter->num_rx_queues; i++) { - j = adapter->rx_ring[i].reg_idx; + int j = adapter->rx_ring[i].reg_idx; wr32(E1000_SRRCTL(j), srrctl); } @@ -5422,89 +5461,4 @@ static void igb_vmm_control(struct igb_adapter *adapter) igb_vmdq_set_replication_pf(hw, true); } -#ifdef CONFIG_PCI_IOV -static ssize_t igb_show_num_vfs(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct igb_adapter *adapter = netdev_priv(to_net_dev(dev)); - - return sprintf(buf, "%d\n", adapter->vfs_allocated_count); -} - -static ssize_t igb_set_num_vfs(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct net_device *netdev = to_net_dev(dev); - struct igb_adapter *adapter = netdev_priv(netdev); - struct e1000_hw *hw = &adapter->hw; - struct pci_dev *pdev = adapter->pdev; - unsigned int num_vfs, i; - unsigned char mac_addr[ETH_ALEN]; - int err; - - sscanf(buf, "%u", &num_vfs); - - if (num_vfs > 7) - num_vfs = 7; - - /* value unchanged do nothing */ - if (num_vfs == adapter->vfs_allocated_count) - return count; - - if (netdev->flags & IFF_UP) - igb_close(netdev); - - igb_reset_interrupt_capability(adapter); - igb_free_queues(adapter); - adapter->tx_ring = NULL; - adapter->rx_ring = NULL; - adapter->vfs_allocated_count = 0; - - /* reclaim resources allocated to VFs since we are changing count */ - if (adapter->vf_data) { - /* disable iov and allow time for transactions to clear */ - pci_disable_sriov(pdev); - msleep(500); - - kfree(adapter->vf_data); - adapter->vf_data = NULL; - wr32(E1000_IOVCTL, E1000_IOVCTL_REUSE_VFQ); - msleep(100); - dev_info(&pdev->dev, "IOV Disabled\n"); - } - - 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; - } - } - } - - igb_set_interrupt_capability(adapter); - igb_alloc_queues(adapter); - igb_reset(adapter); - - if (netdev->flags & IFF_UP) - igb_open(netdev); - - return count; -} -#endif /* CONFIG_PCI_IOV */ /* igb_main.c */ |