1 // SPDX-License-Identifier: GPL-2.0+ 2 // Copyright (c) 2024 Hisilicon Limited. 3 4 #include <linux/etherdevice.h> 5 #include <linux/netdevice.h> 6 #include <linux/phy.h> 7 #include <linux/rtnetlink.h> 8 #include "hbg_common.h" 9 #include "hbg_err.h" 10 #include "hbg_hw.h" 11 12 static void hbg_restore_mac_table(struct hbg_priv *priv) 13 { 14 struct hbg_mac_filter *filter = &priv->filter; 15 u64 addr; 16 u32 i; 17 18 for (i = 0; i < filter->table_max_len; i++) 19 if (!is_zero_ether_addr(filter->mac_table[i].addr)) { 20 addr = ether_addr_to_u64(filter->mac_table[i].addr); 21 hbg_hw_set_uc_addr(priv, addr, i); 22 } 23 24 hbg_hw_set_mac_filter_enable(priv, priv->filter.enabled); 25 } 26 27 static void hbg_restore_user_def_settings(struct hbg_priv *priv) 28 { 29 struct ethtool_pauseparam *pause_param = &priv->user_def.pause_param; 30 31 hbg_restore_mac_table(priv); 32 hbg_hw_set_mtu(priv, priv->netdev->mtu); 33 hbg_hw_set_pause_enable(priv, pause_param->tx_pause, 34 pause_param->rx_pause); 35 } 36 37 int hbg_rebuild(struct hbg_priv *priv) 38 { 39 int ret; 40 41 ret = hbg_hw_init(priv); 42 if (ret) 43 return ret; 44 45 hbg_restore_user_def_settings(priv); 46 return 0; 47 } 48 49 static int hbg_reset_prepare(struct hbg_priv *priv, enum hbg_reset_type type) 50 { 51 int ret; 52 53 ASSERT_RTNL(); 54 55 if (netif_running(priv->netdev)) { 56 dev_warn(&priv->pdev->dev, 57 "failed to reset because port is up\n"); 58 return -EBUSY; 59 } 60 61 priv->reset_type = type; 62 set_bit(HBG_NIC_STATE_RESETTING, &priv->state); 63 clear_bit(HBG_NIC_STATE_RESET_FAIL, &priv->state); 64 ret = hbg_hw_event_notify(priv, HBG_HW_EVENT_RESET); 65 if (ret) { 66 set_bit(HBG_NIC_STATE_RESET_FAIL, &priv->state); 67 clear_bit(HBG_NIC_STATE_RESETTING, &priv->state); 68 } 69 70 return ret; 71 } 72 73 static int hbg_reset_done(struct hbg_priv *priv, enum hbg_reset_type type) 74 { 75 int ret; 76 77 if (!test_bit(HBG_NIC_STATE_RESETTING, &priv->state) || 78 type != priv->reset_type) 79 return 0; 80 81 ASSERT_RTNL(); 82 83 clear_bit(HBG_NIC_STATE_RESETTING, &priv->state); 84 ret = hbg_rebuild(priv); 85 if (ret) { 86 set_bit(HBG_NIC_STATE_RESET_FAIL, &priv->state); 87 dev_err(&priv->pdev->dev, "failed to rebuild after reset\n"); 88 return ret; 89 } 90 91 dev_info(&priv->pdev->dev, "reset done\n"); 92 return ret; 93 } 94 95 /* must be protected by rtnl lock */ 96 int hbg_reset(struct hbg_priv *priv) 97 { 98 int ret; 99 100 ASSERT_RTNL(); 101 ret = hbg_reset_prepare(priv, HBG_RESET_TYPE_FUNCTION); 102 if (ret) 103 return ret; 104 105 return hbg_reset_done(priv, HBG_RESET_TYPE_FUNCTION); 106 } 107 108 static void hbg_pci_err_reset_prepare(struct pci_dev *pdev) 109 { 110 struct net_device *netdev = pci_get_drvdata(pdev); 111 struct hbg_priv *priv = netdev_priv(netdev); 112 113 rtnl_lock(); 114 hbg_reset_prepare(priv, HBG_RESET_TYPE_FLR); 115 } 116 117 static void hbg_pci_err_reset_done(struct pci_dev *pdev) 118 { 119 struct net_device *netdev = pci_get_drvdata(pdev); 120 struct hbg_priv *priv = netdev_priv(netdev); 121 122 hbg_reset_done(priv, HBG_RESET_TYPE_FLR); 123 rtnl_unlock(); 124 } 125 126 static const struct pci_error_handlers hbg_pci_err_handler = { 127 .reset_prepare = hbg_pci_err_reset_prepare, 128 .reset_done = hbg_pci_err_reset_done, 129 }; 130 131 void hbg_set_pci_err_handler(struct pci_driver *pdrv) 132 { 133 pdrv->err_handler = &hbg_pci_err_handler; 134 } 135