diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c | 61 |
1 files changed, 57 insertions, 4 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c index b568988e92e3..f27eab6e4929 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c @@ -325,6 +325,48 @@ static void mlx5_fw_live_patch_event(struct work_struct *work) mlx5_core_err(dev, "Failed to reload FW tracer\n"); } +#if IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE) +static int mlx5_check_hotplug_interrupt(struct mlx5_core_dev *dev) +{ + struct pci_dev *bridge = dev->pdev->bus->self; + u16 reg16; + int err; + + if (!bridge) + return -EOPNOTSUPP; + + err = pcie_capability_read_word(bridge, PCI_EXP_SLTCTL, ®16); + if (err) + return err; + + if ((reg16 & PCI_EXP_SLTCTL_HPIE) && (reg16 & PCI_EXP_SLTCTL_DLLSCE)) { + mlx5_core_warn(dev, "FW reset is not supported as HotPlug is enabled\n"); + return -EOPNOTSUPP; + } + + return 0; +} +#endif + +static const struct pci_device_id mgt_ifc_device_ids[] = { + { PCI_VDEVICE(MELLANOX, 0xc2d2) }, /* BlueField1 MGT interface device ID */ + { PCI_VDEVICE(MELLANOX, 0xc2d3) }, /* BlueField2 MGT interface device ID */ + { PCI_VDEVICE(MELLANOX, 0xc2d4) }, /* BlueField3-Lx MGT interface device ID */ + { PCI_VDEVICE(MELLANOX, 0xc2d5) }, /* BlueField3 MGT interface device ID */ + { PCI_VDEVICE(MELLANOX, 0xc2d6) }, /* BlueField4 MGT interface device ID */ +}; + +static bool mlx5_is_mgt_ifc_pci_device(struct mlx5_core_dev *dev, u16 dev_id) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(mgt_ifc_device_ids); ++i) + if (mgt_ifc_device_ids[i].device == dev_id) + return true; + + return false; +} + static int mlx5_check_dev_ids(struct mlx5_core_dev *dev, u16 dev_id) { struct pci_bus *bridge_bus = dev->pdev->bus; @@ -339,10 +381,15 @@ static int mlx5_check_dev_ids(struct mlx5_core_dev *dev, u16 dev_id) err = pci_read_config_word(sdev, PCI_DEVICE_ID, &sdev_id); if (err) return pcibios_err_to_errno(err); - if (sdev_id != dev_id) { - mlx5_core_warn(dev, "unrecognized dev_id (0x%x)\n", sdev_id); - return -EPERM; - } + + if (sdev_id == dev_id) + continue; + + if (mlx5_is_mgt_ifc_pci_device(dev, sdev_id)) + continue; + + mlx5_core_warn(dev, "unrecognized dev_id (0x%x)\n", sdev_id); + return -EPERM; } return 0; } @@ -357,6 +404,12 @@ static bool mlx5_is_reset_now_capable(struct mlx5_core_dev *dev) return false; } +#if IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE) + err = mlx5_check_hotplug_interrupt(dev); + if (err) + return false; +#endif + err = pci_read_config_word(dev->pdev, PCI_DEVICE_ID, &dev_id); if (err) return false; |