From 988d13073fe122f0b6a2b80b5f2aa1b0717f9edb Mon Sep 17 00:00:00 2001 From: Mark Rustad Date: Fri, 30 Oct 2015 15:29:34 -0700 Subject: [PATCH] ixgbe: Save VF info and take references Save VF device pointers and take references to speed accesses used to monitor the device behavior to avoid slot resets. The saved information avoids lock contention during the search used to access each of the VFs. Signed-off-by: Mark Rustad Tested-by: Darin Miller Tested-by: Phil Schmitt Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ixgbe/ixgbe.h | 1 + drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 31 ++++++---------- drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 50 ++++++++++++++++++++++++-- 3 files changed, 59 insertions(+), 23 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h index 518f339..445b4c9 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h @@ -139,6 +139,7 @@ enum ixgbe_tx_flags { #define IXGBE_X540_VF_DEVICE_ID 0x1515 struct vf_data_storage { + struct pci_dev *vfdev; unsigned char vf_mac_addresses[ETH_ALEN]; u16 vf_mc_hashes[IXGBE_MAX_VF_MC_ENTRIES]; u16 num_vf_mc_hashes; diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 6192628..a10a0fa 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -6666,10 +6666,8 @@ static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter) { struct ixgbe_hw *hw = &adapter->hw; struct pci_dev *pdev = adapter->pdev; - struct pci_dev *vfdev; + unsigned int vf; u32 gpc; - int pos; - unsigned short vf_id; if (!(netif_carrier_ok(adapter->netdev))) return; @@ -6686,26 +6684,17 @@ static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter) if (!pdev) return; - pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); - if (!pos) - return; - - /* get the device ID for the VF */ - pci_read_config_word(pdev, pos + PCI_SRIOV_VF_DID, &vf_id); - /* check status reg for all VFs owned by this PF */ - vfdev = pci_get_device(pdev->vendor, vf_id, NULL); - while (vfdev) { - if (vfdev->is_virtfn && (vfdev->physfn == pdev)) { - u16 status_reg; - - pci_read_config_word(vfdev, PCI_STATUS, &status_reg); - if (status_reg & PCI_STATUS_REC_MASTER_ABORT) - /* issue VFLR */ - ixgbe_issue_vf_flr(adapter, vfdev); - } + for (vf = 0; vf < adapter->num_vfs; ++vf) { + struct pci_dev *vfdev = adapter->vfinfo[vf].vfdev; + u16 status_reg; - vfdev = pci_get_device(pdev->vendor, vf_id, vfdev); + if (!vfdev) + continue; + pci_read_config_word(vfdev, PCI_STATUS, &status_reg); + if (status_reg != IXGBE_FAILED_READ_CFG_WORD && + status_reg & PCI_STATUS_REC_MASTER_ABORT) + ixgbe_issue_vf_flr(adapter, vfdev); } } diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c index fcd8b27..31de6cf 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 - 2014 Intel Corporation. + Copyright(c) 1999 - 2015 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, @@ -130,6 +130,38 @@ static int __ixgbe_enable_sriov(struct ixgbe_adapter *adapter) return -ENOMEM; } +/** + * ixgbe_get_vfs - Find and take references to all vf devices + * @adapter: Pointer to adapter struct + */ +static void ixgbe_get_vfs(struct ixgbe_adapter *adapter) +{ + struct pci_dev *pdev = adapter->pdev; + u16 vendor = pdev->vendor; + struct pci_dev *vfdev; + int vf = 0; + u16 vf_id; + int pos; + + pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); + if (!pos) + return; + pci_read_config_word(pdev, pos + PCI_SRIOV_VF_DID, &vf_id); + + vfdev = pci_get_device(vendor, vf_id, NULL); + for (; vfdev; vfdev = pci_get_device(vendor, vf_id, vfdev)) { + if (!vfdev->is_virtfn) + continue; + if (vfdev->physfn != pdev) + continue; + if (vf >= adapter->num_vfs) + continue; + pci_dev_get(vfdev); + adapter->vfinfo[vf].vfdev = vfdev; + ++vf; + } +} + /* Note this function is called when the user wants to enable SR-IOV * VFs using the now deprecated module parameter */ @@ -170,8 +202,10 @@ void ixgbe_enable_sriov(struct ixgbe_adapter *adapter) } } - if (!__ixgbe_enable_sriov(adapter)) + if (!__ixgbe_enable_sriov(adapter)) { + ixgbe_get_vfs(adapter); return; + } /* If we have gotten to this point then there is no memory available * to manage the VF devices - print message and bail. @@ -184,6 +218,7 @@ void ixgbe_enable_sriov(struct ixgbe_adapter *adapter) #endif /* #ifdef CONFIG_PCI_IOV */ int ixgbe_disable_sriov(struct ixgbe_adapter *adapter) { + unsigned int num_vfs = adapter->num_vfs, vf; struct ixgbe_hw *hw = &adapter->hw; u32 gpie; u32 vmdctl; @@ -192,6 +227,16 @@ int ixgbe_disable_sriov(struct ixgbe_adapter *adapter) /* set num VFs to 0 to prevent access to vfinfo */ adapter->num_vfs = 0; + /* put the reference to all of the vf devices */ + for (vf = 0; vf < num_vfs; ++vf) { + struct pci_dev *vfdev = adapter->vfinfo[vf].vfdev; + + if (!vfdev) + continue; + adapter->vfinfo[vf].vfdev = NULL; + pci_dev_put(vfdev); + } + /* free VF control structures */ kfree(adapter->vfinfo); adapter->vfinfo = NULL; @@ -289,6 +334,7 @@ static int ixgbe_pci_sriov_enable(struct pci_dev *dev, int num_vfs) e_dev_warn("Failed to enable PCI sriov: %d\n", err); return err; } + ixgbe_get_vfs(adapter); ixgbe_sriov_reinit(adapter); return num_vfs; -- 2.7.4