diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c')
-rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 203 |
1 files changed, 143 insertions, 60 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c index 85cddac673ef..d44b4d21268c 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c @@ -1,7 +1,7 @@ /******************************************************************************* Intel 10 Gigabit PCI Express Linux driver - Copyright(c) 1999 - 2012 Intel Corporation. + Copyright(c) 1999 - 2013 Intel Corporation. This program is free software; you can redistribute it and/or modify it under the terms and conditions of the GNU General Public License, @@ -44,50 +44,11 @@ #include "ixgbe_sriov.h" #ifdef CONFIG_PCI_IOV -void ixgbe_enable_sriov(struct ixgbe_adapter *adapter, - const struct ixgbe_info *ii) +static int __ixgbe_enable_sriov(struct ixgbe_adapter *adapter) { struct ixgbe_hw *hw = &adapter->hw; int num_vf_macvlans, i; struct vf_macvlans *mv_list; - int pre_existing_vfs = 0; - - pre_existing_vfs = pci_num_vf(adapter->pdev); - if (!pre_existing_vfs && !adapter->num_vfs) - return; - - /* If there are pre-existing VFs then we have to force - * use of that many because they were not deleted the last - * time someone removed the PF driver. That would have - * been because they were allocated to guest VMs and can't - * be removed. Go ahead and just re-enable the old amount. - * If the user wants to change the number of VFs they can - * use ethtool while making sure no VFs are allocated to - * guest VMs... i.e. the right way. - */ - if (pre_existing_vfs) { - adapter->num_vfs = pre_existing_vfs; - dev_warn(&adapter->pdev->dev, "Virtual Functions already " - "enabled for this device - Please reload all " - "VF drivers to avoid spoofed packet errors\n"); - } else { - int err; - /* - * The 82599 supports up to 64 VFs per physical function - * but this implementation limits allocation to 63 so that - * basic networking resources are still available to the - * physical function. If the user requests greater thn - * 63 VFs then it is an error - reset to default of zero. - */ - adapter->num_vfs = min_t(unsigned int, adapter->num_vfs, 63); - - err = pci_enable_sriov(adapter->pdev, adapter->num_vfs); - if (err) { - e_err(probe, "Failed to enable PCI sriov: %d\n", err); - adapter->num_vfs = 0; - return; - } - } adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED; e_info(probe, "SR-IOV enabled with %d VFs\n", adapter->num_vfs); @@ -128,12 +89,6 @@ void ixgbe_enable_sriov(struct ixgbe_adapter *adapter, kcalloc(adapter->num_vfs, sizeof(struct vf_data_storage), GFP_KERNEL); if (adapter->vfinfo) { - /* Now that we're sure SR-IOV is enabled - * and memory allocated set up the mailbox parameters - */ - ixgbe_init_mbx_params_pf(hw); - memcpy(&hw->mbx.ops, ii->mbx_ops, sizeof(hw->mbx.ops)); - /* limit trafffic classes based on VFs enabled */ if ((adapter->hw.mac.type == ixgbe_mac_82599EB) && (adapter->num_vfs < 16)) { @@ -157,10 +112,62 @@ void ixgbe_enable_sriov(struct ixgbe_adapter *adapter, /* enable spoof checking for all VFs */ for (i = 0; i < adapter->num_vfs; i++) adapter->vfinfo[i].spoofchk_enabled = true; + return 0; + } + + return -ENOMEM; +} + +/* Note this function is called when the user wants to enable SR-IOV + * VFs using the now deprecated module parameter + */ +void ixgbe_enable_sriov(struct ixgbe_adapter *adapter) +{ + int pre_existing_vfs = 0; + + pre_existing_vfs = pci_num_vf(adapter->pdev); + if (!pre_existing_vfs && !adapter->num_vfs) return; + + if (!pre_existing_vfs) + dev_warn(&adapter->pdev->dev, + "Enabling SR-IOV VFs using the module parameter is deprecated - please use the pci sysfs interface.\n"); + + /* If there are pre-existing VFs then we have to force + * use of that many - over ride any module parameter value. + * This may result from the user unloading the PF driver + * while VFs were assigned to guest VMs or because the VFs + * have been created via the new PCI SR-IOV sysfs interface. + */ + if (pre_existing_vfs) { + adapter->num_vfs = pre_existing_vfs; + dev_warn(&adapter->pdev->dev, + "Virtual Functions already enabled for this device - Please reload all VF drivers to avoid spoofed packet errors\n"); + } else { + int err; + /* + * The 82599 supports up to 64 VFs per physical function + * but this implementation limits allocation to 63 so that + * basic networking resources are still available to the + * physical function. If the user requests greater thn + * 63 VFs then it is an error - reset to default of zero. + */ + adapter->num_vfs = min_t(unsigned int, adapter->num_vfs, 63); + + err = pci_enable_sriov(adapter->pdev, adapter->num_vfs); + if (err) { + e_err(probe, "Failed to enable PCI sriov: %d\n", err); + adapter->num_vfs = 0; + return; + } } - /* Oh oh */ + if (!__ixgbe_enable_sriov(adapter)) + return; + + /* If we have gotten to this point then there is no memory available + * to manage the VF devices - print message and bail. + */ e_err(probe, "Unable to allocate memory for VF Data Storage - " "SRIOV disabled\n"); ixgbe_disable_sriov(adapter); @@ -200,11 +207,12 @@ static bool ixgbe_vfs_are_assigned(struct ixgbe_adapter *adapter) } #endif /* #ifdef CONFIG_PCI_IOV */ -void ixgbe_disable_sriov(struct ixgbe_adapter *adapter) +int ixgbe_disable_sriov(struct ixgbe_adapter *adapter) { struct ixgbe_hw *hw = &adapter->hw; u32 gpie; u32 vmdctl; + int rss; /* set num VFs to 0 to prevent access to vfinfo */ adapter->num_vfs = 0; @@ -219,7 +227,7 @@ void ixgbe_disable_sriov(struct ixgbe_adapter *adapter) /* if SR-IOV is already disabled then there is nothing to do */ if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) - return; + return 0; #ifdef CONFIG_PCI_IOV /* @@ -229,7 +237,7 @@ void ixgbe_disable_sriov(struct ixgbe_adapter *adapter) */ if (ixgbe_vfs_are_assigned(adapter)) { e_dev_warn("Unloading driver while VFs are assigned - VFs will not be deallocated\n"); - return; + return -EPERM; } /* disable iov and allow time for transactions to clear */ pci_disable_sriov(adapter->pdev); @@ -252,10 +260,94 @@ void ixgbe_disable_sriov(struct ixgbe_adapter *adapter) adapter->flags &= ~IXGBE_FLAG_VMDQ_ENABLED; adapter->ring_feature[RING_F_VMDQ].offset = 0; + rss = min_t(int, IXGBE_MAX_RSS_INDICES, num_online_cpus()); + adapter->ring_feature[RING_F_RSS].limit = rss; + /* take a breather then clean up driver data */ msleep(100); adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED; + return 0; +} + +static int ixgbe_pci_sriov_enable(struct pci_dev *dev, int num_vfs) +{ +#ifdef CONFIG_PCI_IOV + struct ixgbe_adapter *adapter = pci_get_drvdata(dev); + int err = 0; + int i; + int pre_existing_vfs = pci_num_vf(dev); + + if (pre_existing_vfs && pre_existing_vfs != num_vfs) + err = ixgbe_disable_sriov(adapter); + else if (pre_existing_vfs && pre_existing_vfs == num_vfs) + goto out; + + if (err) + goto err_out; + + /* While the SR-IOV capability structure reports total VFs to be + * 64 we limit the actual number that can be allocated to 63 so + * that some transmit/receive resources can be reserved to the + * PF. The PCI bus driver already checks for other values out of + * range. + */ + if (num_vfs > 63) { + err = -EPERM; + goto err_out; + } + + adapter->num_vfs = num_vfs; + + err = __ixgbe_enable_sriov(adapter); + if (err) + goto err_out; + + for (i = 0; i < adapter->num_vfs; i++) + ixgbe_vf_configuration(dev, (i | 0x10000000)); + + err = pci_enable_sriov(dev, num_vfs); + if (err) { + e_dev_warn("Failed to enable PCI sriov: %d\n", err); + goto err_out; + } + ixgbe_sriov_reinit(adapter); + +out: + return num_vfs; + +err_out: + return err; +#endif + return 0; +} + +static int ixgbe_pci_sriov_disable(struct pci_dev *dev) +{ + struct ixgbe_adapter *adapter = pci_get_drvdata(dev); + int err; + u32 current_flags = adapter->flags; + + err = ixgbe_disable_sriov(adapter); + + /* Only reinit if no error and state changed */ + if (!err && current_flags != adapter->flags) { + /* ixgbe_disable_sriov() doesn't clear VMDQ flag */ + adapter->flags &= ~IXGBE_FLAG_VMDQ_ENABLED; +#ifdef CONFIG_PCI_IOV + ixgbe_sriov_reinit(adapter); +#endif + } + + return err; +} + +int ixgbe_pci_sriov_configure(struct pci_dev *dev, int num_vfs) +{ + if (num_vfs == 0) + return ixgbe_pci_sriov_disable(dev); + else + return ixgbe_pci_sriov_enable(dev, num_vfs); } static int ixgbe_set_vf_multicasts(struct ixgbe_adapter *adapter, @@ -447,15 +539,6 @@ static void ixgbe_set_vmolr(struct ixgbe_hw *hw, u32 vf, bool aupe) IXGBE_WRITE_REG(hw, IXGBE_VMOLR(vf), vmolr); } -static void ixgbe_set_vmvir(struct ixgbe_adapter *adapter, - u16 vid, u16 qos, u32 vf) -{ - struct ixgbe_hw *hw = &adapter->hw; - u32 vmvir = vid | (qos << VLAN_PRIO_SHIFT) | IXGBE_VMVIR_VLANA_DEFAULT; - - IXGBE_WRITE_REG(hw, IXGBE_VMVIR(vf), vmvir); -} - static void ixgbe_clear_vmvir(struct ixgbe_adapter *adapter, u32 vf) { struct ixgbe_hw *hw = &adapter->hw; |