From patchwork Tue May 14 02:28:25 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 2562471 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id AAA923FC5A for ; Tue, 14 May 2013 02:29:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756248Ab3ENC3U (ORCPT ); Mon, 13 May 2013 22:29:20 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:50370 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756180Ab3ENC26 (ORCPT ); Mon, 13 May 2013 22:28:58 -0400 Received: from ucsinet21.oracle.com (ucsinet21.oracle.com [156.151.31.93]) by userp1040.oracle.com (Sentrion-MTA-4.3.1/Sentrion-MTA-4.3.1) with ESMTP id r4E2Sor7008865 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 14 May 2013 02:28:51 GMT Received: from aserz7022.oracle.com (aserz7022.oracle.com [141.146.126.231]) by ucsinet21.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id r4E2SoVC026249 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL); Tue, 14 May 2013 02:28:51 GMT Received: from abhmt109.oracle.com (abhmt109.oracle.com [141.146.116.61]) by aserz7022.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id r4E2SoH0014965; Tue, 14 May 2013 02:28:50 GMT Received: from linux-siqj.site (/75.36.254.174) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 13 May 2013 19:28:50 -0700 From: Yinghai Lu To: Bjorn Helgaas Cc: Gu Zheng , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yinghai Lu , netdev@vger.kernel.org Subject: [PATCH 6/7] PCI: Make sure VF's driver get attached after PF's Date: Mon, 13 May 2013 19:28:25 -0700 Message-Id: <1368498506-25857-7-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1368498506-25857-1-git-send-email-yinghai@kernel.org> References: <1368498506-25857-1-git-send-email-yinghai@kernel.org> X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Found kernel try to load mlx4 drivers for VFs before PF's is really loaded when the drivers are built-in, and kernel command line include probe_vfs=63, num_vfs=63. It turns that it also happen for hotadd path even drivers are compiled as modules and if they loaded. Esp some VF share the same driver with PF. calling path: device driver probe ==> pci_enable_sriov ==> virtfn_add ==> pci_dev_add ==> pci_bus_device_add when pci_bus_device_add is called, the VF's driver will be attached. and at that time PF's driver does not finish yet. Need to move out pci_bus_device_add from virtfn_add and call it later. Fix the problem for two path, 1. hotadd path: use device_schedule_callback. 2. for booting path, use initcall to call that for all VF's. Signed-off-by: Yinghai Lu Cc: netdev@vger.kernel.org --- drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c | 7 + drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 4 - drivers/net/ethernet/cisco/enic/enic_main.c | 2 drivers/net/ethernet/emulex/benet/be_main.c | 4 + drivers/net/ethernet/intel/igb/igb_main.c | 11 ++ drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 2 drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 9 +- drivers/net/ethernet/mellanox/mlx4/main.c | 2 drivers/net/ethernet/neterion/vxge/vxge-main.c | 3 drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c | 5 + drivers/net/ethernet/sfc/efx.c | 1 drivers/pci/iov.c | 73 +++++++++++++++++-- drivers/scsi/lpfc/lpfc_init.c | 2 include/linux/pci.h | 4 + 14 files changed, 115 insertions(+), 14 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: linux-2.6/drivers/net/ethernet/mellanox/mlx4/main.c =================================================================== --- linux-2.6.orig/drivers/net/ethernet/mellanox/mlx4/main.c +++ linux-2.6/drivers/net/ethernet/mellanox/mlx4/main.c @@ -2308,6 +2308,8 @@ slave_start: priv->pci_dev_data = pci_dev_data; pci_set_drvdata(pdev, dev); + pci_bus_add_device_vfs(pdev); + return 0; err_port: Index: linux-2.6/drivers/pci/iov.c =================================================================== --- linux-2.6.orig/drivers/pci/iov.c +++ linux-2.6/drivers/pci/iov.c @@ -66,7 +66,8 @@ static void virtfn_remove_bus(struct pci pci_remove_bus(child); } -static int virtfn_add(struct pci_dev *dev, int id, int reset) +static int virtfn_add(struct pci_dev *dev, int id, int reset, + struct pci_dev **ret) { int i; int rc; @@ -116,7 +117,6 @@ static int virtfn_add(struct pci_dev *de pci_device_add(virtfn, virtfn->bus); mutex_unlock(&iov->dev->sriov->lock); - rc = pci_bus_add_device(virtfn); sprintf(buf, "virtfn%u", id); rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf); if (rc) @@ -127,6 +127,8 @@ static int virtfn_add(struct pci_dev *de kobject_uevent(&virtfn->dev.kobj, KOBJ_CHANGE); + if (ret) + *ret = virtfn; return 0; failed2: @@ -141,6 +143,55 @@ failed1: return rc; } +static void pci_bus_add_vf(struct pci_dev *dev) +{ + int rc; + + if (!dev || !dev->is_virtfn || dev->is_added) + return; + + rc = pci_bus_add_device(dev); +} + +static void bus_add_vfs(struct device *device) +{ + struct pci_dev *dev = to_pci_dev(device); + int i, num_vfs = pci_num_vf(dev); + + for (i = 0; i < num_vfs; i++) { + struct pci_bus *bus; + struct pci_dev *virtfn; + + bus = pci_find_bus(pci_domain_nr(dev->bus), virtfn_bus(dev, i)); + if (!bus) + continue; + + virtfn = pci_get_slot(bus, virtfn_devfn(dev, i)); + pci_bus_add_vf(virtfn); + pci_dev_put(virtfn); + } +} +void pci_bus_add_device_vfs(struct pci_dev *pdev) +{ + if (system_state == SYSTEM_BOOTING) + return; + + device_schedule_callback(&pdev->dev, bus_add_vfs); +} +EXPORT_SYMBOL_GPL(pci_bus_add_device_vfs); + +/* Make sure all VFs get added before pci_sysfs_init */ +static int __init pci_bus_add_device_vfs_booting(void) +{ + struct pci_dev *dev = NULL; + + for_each_pci_dev(dev) + pci_bus_add_vf(dev); + + return 0; +} +device_initcall_sync(pci_bus_add_device_vfs_booting); + static void virtfn_remove(struct pci_dev *dev, int id, int reset) { char buf[VIRTFN_ID_LEN]; @@ -213,14 +264,22 @@ static void sriov_migration_task(struct if (state == PCI_SRIOV_VFM_MI) { writeb(PCI_SRIOV_VFM_AV, iov->mstate + i); state = readb(iov->mstate + i); - if (state == PCI_SRIOV_VFM_AV) - virtfn_add(iov->self, i, 1); + if (state == PCI_SRIOV_VFM_AV) { + struct pci_dev *virtfn = NULL; + + virtfn_add(iov->self, i, 1, &virtfn); + pci_bus_add_vf(virtfn); + } } else if (state == PCI_SRIOV_VFM_MO) { virtfn_remove(iov->self, i, 1); writeb(PCI_SRIOV_VFM_UA, iov->mstate + i); state = readb(iov->mstate + i); - if (state == PCI_SRIOV_VFM_AV) - virtfn_add(iov->self, i, 0); + if (state == PCI_SRIOV_VFM_AV) { + struct pci_dev *virtfn = NULL; + + virtfn_add(iov->self, i, 0, &virtfn); + pci_bus_add_vf(virtfn); + } } } @@ -356,7 +415,7 @@ static int sriov_enable(struct pci_dev * initial = nr_virtfn; for (i = 0; i < initial; i++) { - rc = virtfn_add(dev, i, 0); + rc = virtfn_add(dev, i, 0, NULL); if (rc) goto failed; } Index: linux-2.6/include/linux/pci.h =================================================================== --- linux-2.6.orig/include/linux/pci.h +++ linux-2.6/include/linux/pci.h @@ -1659,6 +1659,7 @@ void __iomem *pci_ioremap_bar(struct pci #ifdef CONFIG_PCI_IOV int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn); +void pci_bus_add_device_vfs(struct pci_dev *dev); void pci_disable_sriov(struct pci_dev *dev); irqreturn_t pci_sriov_migration(struct pci_dev *dev); int pci_num_vf(struct pci_dev *dev); @@ -1670,6 +1671,9 @@ static inline int pci_enable_sriov(struc { return -ENODEV; } +static inline void pci_bus_add_device_vfs(struct pci_dev *dev) +{ +} static inline void pci_disable_sriov(struct pci_dev *dev) { } Index: linux-2.6/drivers/net/ethernet/intel/igb/igb_main.c =================================================================== --- linux-2.6.orig/drivers/net/ethernet/intel/igb/igb_main.c +++ linux-2.6/drivers/net/ethernet/intel/igb/igb_main.c @@ -2366,6 +2366,9 @@ static int igb_probe(struct pci_dev *pde } pm_runtime_put_noidle(&pdev->dev); + + pci_bus_add_device_vfs(pdev); + return 0; err_register: @@ -7278,8 +7281,12 @@ static int igb_pci_sriov_configure(struc #ifdef CONFIG_PCI_IOV if (num_vfs == 0) return igb_pci_disable_sriov(dev); - else - return igb_pci_enable_sriov(dev, num_vfs); + else { + int ret = igb_pci_enable_sriov(dev, num_vfs); + if (ret > 0) + pci_bus_add_device_vfs(dev); + return ret; + } #endif return 0; } Index: linux-2.6/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c =================================================================== --- linux-2.6.orig/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c +++ linux-2.6/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c @@ -346,8 +346,13 @@ int ixgbe_pci_sriov_configure(struct pci { if (num_vfs == 0) return ixgbe_pci_sriov_disable(dev); - else - return ixgbe_pci_sriov_enable(dev, num_vfs); + else { + int ret = ixgbe_pci_sriov_enable(dev, num_vfs); + + if (ret > 0) + pci_bus_add_device_vfs(dev); + return ret; + } } static int ixgbe_set_vf_multicasts(struct ixgbe_adapter *adapter, Index: linux-2.6/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c =================================================================== --- linux-2.6.orig/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ linux-2.6/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -7658,6 +7658,8 @@ skip_sriov: IXGBE_LINK_SPEED_10GB_FULL | IXGBE_LINK_SPEED_1GB_FULL, true); + pci_bus_add_device_vfs(pdev); + return 0; err_register: Index: linux-2.6/drivers/scsi/lpfc/lpfc_init.c =================================================================== --- linux-2.6.orig/drivers/scsi/lpfc/lpfc_init.c +++ linux-2.6/drivers/scsi/lpfc/lpfc_init.c @@ -10582,6 +10582,8 @@ lpfc_pci_probe_one(struct pci_dev *pdev, else rc = lpfc_pci_probe_one_s3(pdev, pid); + pci_bus_add_device_vfs(pdev); + return rc; } Index: linux-2.6/drivers/net/ethernet/emulex/benet/be_main.c =================================================================== --- linux-2.6.orig/drivers/net/ethernet/emulex/benet/be_main.c +++ linux-2.6/drivers/net/ethernet/emulex/benet/be_main.c @@ -4119,6 +4119,7 @@ static int lancer_recover_func(struct be if (status) goto err; + pci_bus_add_device_vfs(adapter->pdev); if (netif_running(adapter->netdev)) { status = be_open(adapter->netdev); if (status) @@ -4335,6 +4336,8 @@ static int be_probe(struct pci_dev *pdev dev_info(&pdev->dev, "%s: %s %s port %c\n", nic_name(pdev), func_name(adapter), mc_name(adapter), port_name); + pci_bus_add_device_vfs(pdev); + return 0; unsetup: @@ -4406,6 +4409,7 @@ static int be_resume(struct pci_dev *pde rtnl_unlock(); } + pci_bus_add_device_vfs(adapter->pdev); schedule_delayed_work(&adapter->func_recovery_work, msecs_to_jiffies(1000)); netif_device_attach(netdev); Index: linux-2.6/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c =================================================================== --- linux-2.6.orig/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c +++ linux-2.6/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c @@ -568,8 +568,11 @@ int qlcnic_pci_sriov_configure(struct pc if (num_vfs == 0) err = qlcnic_pci_sriov_disable(adapter); - else + else { err = qlcnic_pci_sriov_enable(adapter, num_vfs); + if (err > 0) + pci_bus_add_device_vfs(dev); + } clear_bit(__QLCNIC_RESETTING, &adapter->state); return err; Index: linux-2.6/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c =================================================================== --- linux-2.6.orig/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c +++ linux-2.6/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c @@ -3048,7 +3048,12 @@ int bnx2x_sriov_configure(struct pci_dev pci_disable_sriov(dev); return 0; } else { - return bnx2x_enable_sriov(bp); + int ret = bnx2x_enable_sriov(bp); + + if (ret > 0) + pci_bus_add_device_vfs(dev); + + return 0; } } Index: linux-2.6/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c =================================================================== --- linux-2.6.orig/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c +++ linux-2.6/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c @@ -5749,10 +5749,12 @@ static int init_one(struct pci_dev *pdev sriov: #ifdef CONFIG_PCI_IOV if (func < ARRAY_SIZE(num_vf) && num_vf[func] > 0) - if (pci_enable_sriov(pdev, num_vf[func]) == 0) + if (pci_enable_sriov(pdev, num_vf[func]) == 0) { dev_info(&pdev->dev, "instantiated %u virtual functions\n", num_vf[func]); + pci_bus_add_device_vfs(pdev); + } #endif return 0; Index: linux-2.6/drivers/net/ethernet/cisco/enic/enic_main.c =================================================================== --- linux-2.6.orig/drivers/net/ethernet/cisco/enic/enic_main.c +++ linux-2.6/drivers/net/ethernet/cisco/enic/enic_main.c @@ -2524,6 +2524,8 @@ static int enic_probe(struct pci_dev *pd goto err_out_dev_deinit; } + pci_bus_add_device_vfs(pdev); + return 0; err_out_dev_deinit: Index: linux-2.6/drivers/net/ethernet/neterion/vxge/vxge-main.c =================================================================== --- linux-2.6.orig/drivers/net/ethernet/neterion/vxge/vxge-main.c +++ linux-2.6/drivers/net/ethernet/neterion/vxge/vxge-main.c @@ -4731,6 +4731,9 @@ vxge_probe(struct pci_dev *pdev, const s vxge_hw_device_trace_level_get(hldev)); kfree(ll_config); + + pci_bus_add_device_vfs(pdev); + return 0; _exit6: Index: linux-2.6/drivers/net/ethernet/sfc/efx.c =================================================================== --- linux-2.6.orig/drivers/net/ethernet/sfc/efx.c +++ linux-2.6/drivers/net/ethernet/sfc/efx.c @@ -2822,6 +2822,7 @@ static int efx_pci_probe(struct pci_dev netif_warn(efx, probe, efx->net_dev, "pci_enable_pcie_error_reporting failed (%d)\n", rc); + pci_bus_add_device_vfs(pci_dev); return 0; fail4: