1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) 2 /* Copyright 2017-2019 NXP */ 3 4 #include <linux/module.h> 5 #include "enetc.h" 6 7 #define ENETC_DRV_NAME_STR "ENETC VF driver" 8 9 /* Messaging */ 10 static void enetc_msg_vsi_write_msg(struct enetc_hw *hw, 11 struct enetc_msg_swbd *msg) 12 { 13 u32 val; 14 15 val = enetc_vsi_set_msize(msg->size) | lower_32_bits(msg->dma); 16 enetc_wr(hw, ENETC_VSIMSGSNDAR1, upper_32_bits(msg->dma)); 17 enetc_wr(hw, ENETC_VSIMSGSNDAR0, val); 18 } 19 20 static int enetc_msg_vsi_send(struct enetc_si *si, struct enetc_msg_swbd *msg) 21 { 22 int timeout = 100; 23 u32 vsimsgsr; 24 25 enetc_msg_vsi_write_msg(&si->hw, msg); 26 27 do { 28 vsimsgsr = enetc_rd(&si->hw, ENETC_VSIMSGSR); 29 if (!(vsimsgsr & ENETC_VSIMSGSR_MB)) 30 break; 31 32 usleep_range(1000, 2000); 33 } while (--timeout); 34 35 if (!timeout) 36 return -ETIMEDOUT; 37 38 /* check for message delivery error */ 39 if (vsimsgsr & ENETC_VSIMSGSR_MS) { 40 dev_err(&si->pdev->dev, "VSI command execute error: %d\n", 41 ENETC_SIMSGSR_GET_MC(vsimsgsr)); 42 return -EIO; 43 } 44 45 return 0; 46 } 47 48 static int enetc_msg_vsi_set_primary_mac_addr(struct enetc_ndev_priv *priv, 49 struct sockaddr *saddr) 50 { 51 struct enetc_msg_cmd_set_primary_mac *cmd; 52 struct enetc_msg_swbd msg; 53 int err; 54 55 msg.size = ALIGN(sizeof(struct enetc_msg_cmd_set_primary_mac), 64); 56 msg.vaddr = dma_alloc_coherent(priv->dev, msg.size, &msg.dma, 57 GFP_KERNEL); 58 if (!msg.vaddr) { 59 dev_err(priv->dev, "Failed to alloc Tx msg (size: %d)\n", 60 msg.size); 61 return -ENOMEM; 62 } 63 64 cmd = (struct enetc_msg_cmd_set_primary_mac *)msg.vaddr; 65 cmd->header.type = ENETC_MSG_CMD_MNG_MAC; 66 cmd->header.id = ENETC_MSG_CMD_MNG_ADD; 67 memcpy(&cmd->mac, saddr, sizeof(struct sockaddr)); 68 69 /* send the command and wait */ 70 err = enetc_msg_vsi_send(priv->si, &msg); 71 72 dma_free_coherent(priv->dev, msg.size, msg.vaddr, msg.dma); 73 74 return err; 75 } 76 77 static int enetc_vf_set_mac_addr(struct net_device *ndev, void *addr) 78 { 79 struct enetc_ndev_priv *priv = netdev_priv(ndev); 80 struct sockaddr *saddr = addr; 81 82 if (!is_valid_ether_addr(saddr->sa_data)) 83 return -EADDRNOTAVAIL; 84 85 return enetc_msg_vsi_set_primary_mac_addr(priv, saddr); 86 } 87 88 static int enetc_vf_set_features(struct net_device *ndev, 89 netdev_features_t features) 90 { 91 return enetc_set_features(ndev, features); 92 } 93 94 /* Probing/ Init */ 95 static const struct net_device_ops enetc_ndev_ops = { 96 .ndo_open = enetc_open, 97 .ndo_stop = enetc_close, 98 .ndo_start_xmit = enetc_xmit, 99 .ndo_get_stats = enetc_get_stats, 100 .ndo_set_mac_address = enetc_vf_set_mac_addr, 101 .ndo_set_features = enetc_vf_set_features, 102 .ndo_do_ioctl = enetc_ioctl, 103 .ndo_setup_tc = enetc_setup_tc, 104 }; 105 106 static void enetc_vf_netdev_setup(struct enetc_si *si, struct net_device *ndev, 107 const struct net_device_ops *ndev_ops) 108 { 109 struct enetc_ndev_priv *priv = netdev_priv(ndev); 110 111 SET_NETDEV_DEV(ndev, &si->pdev->dev); 112 priv->ndev = ndev; 113 priv->si = si; 114 priv->dev = &si->pdev->dev; 115 si->ndev = ndev; 116 117 priv->msg_enable = (NETIF_MSG_IFUP << 1) - 1; 118 ndev->netdev_ops = ndev_ops; 119 enetc_set_ethtool_ops(ndev); 120 ndev->watchdog_timeo = 5 * HZ; 121 ndev->max_mtu = ENETC_MAX_MTU; 122 123 ndev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | 124 NETIF_F_HW_VLAN_CTAG_TX | 125 NETIF_F_HW_VLAN_CTAG_RX; 126 ndev->features = NETIF_F_HIGHDMA | NETIF_F_SG | NETIF_F_RXCSUM | 127 NETIF_F_HW_VLAN_CTAG_TX | 128 NETIF_F_HW_VLAN_CTAG_RX; 129 130 if (si->num_rss) 131 ndev->hw_features |= NETIF_F_RXHASH; 132 133 /* pick up primary MAC address from SI */ 134 enetc_get_primary_mac_addr(&si->hw, ndev->dev_addr); 135 } 136 137 static int enetc_vf_probe(struct pci_dev *pdev, 138 const struct pci_device_id *ent) 139 { 140 struct enetc_ndev_priv *priv; 141 struct net_device *ndev; 142 struct enetc_si *si; 143 int err; 144 145 err = enetc_pci_probe(pdev, KBUILD_MODNAME, 0); 146 if (err) { 147 dev_err(&pdev->dev, "PCI probing failed\n"); 148 return err; 149 } 150 151 si = pci_get_drvdata(pdev); 152 153 enetc_get_si_caps(si); 154 155 ndev = alloc_etherdev_mq(sizeof(*priv), ENETC_MAX_NUM_TXQS); 156 if (!ndev) { 157 err = -ENOMEM; 158 dev_err(&pdev->dev, "netdev creation failed\n"); 159 goto err_alloc_netdev; 160 } 161 162 enetc_vf_netdev_setup(si, ndev, &enetc_ndev_ops); 163 164 priv = netdev_priv(ndev); 165 166 enetc_init_si_rings_params(priv); 167 168 err = enetc_setup_cbdr(priv->dev, &si->hw, ENETC_CBDR_DEFAULT_SIZE, 169 &si->cbd_ring); 170 if (err) 171 goto err_setup_cbdr; 172 173 err = enetc_alloc_si_resources(priv); 174 if (err) { 175 dev_err(&pdev->dev, "SI resource alloc failed\n"); 176 goto err_alloc_si_res; 177 } 178 179 err = enetc_configure_si(priv); 180 if (err) { 181 dev_err(&pdev->dev, "Failed to configure SI\n"); 182 goto err_config_si; 183 } 184 185 err = enetc_alloc_msix(priv); 186 if (err) { 187 dev_err(&pdev->dev, "MSIX alloc failed\n"); 188 goto err_alloc_msix; 189 } 190 191 err = register_netdev(ndev); 192 if (err) 193 goto err_reg_netdev; 194 195 netif_carrier_off(ndev); 196 197 return 0; 198 199 err_reg_netdev: 200 enetc_free_msix(priv); 201 err_config_si: 202 err_alloc_msix: 203 enetc_free_si_resources(priv); 204 err_alloc_si_res: 205 enetc_teardown_cbdr(&si->cbd_ring); 206 err_setup_cbdr: 207 si->ndev = NULL; 208 free_netdev(ndev); 209 err_alloc_netdev: 210 enetc_pci_remove(pdev); 211 212 return err; 213 } 214 215 static void enetc_vf_remove(struct pci_dev *pdev) 216 { 217 struct enetc_si *si = pci_get_drvdata(pdev); 218 struct enetc_ndev_priv *priv; 219 220 priv = netdev_priv(si->ndev); 221 unregister_netdev(si->ndev); 222 223 enetc_free_msix(priv); 224 225 enetc_free_si_resources(priv); 226 enetc_teardown_cbdr(&si->cbd_ring); 227 228 free_netdev(si->ndev); 229 230 enetc_pci_remove(pdev); 231 } 232 233 static const struct pci_device_id enetc_vf_id_table[] = { 234 { PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_DEV_ID_VF) }, 235 { 0, } /* End of table. */ 236 }; 237 MODULE_DEVICE_TABLE(pci, enetc_vf_id_table); 238 239 static struct pci_driver enetc_vf_driver = { 240 .name = KBUILD_MODNAME, 241 .id_table = enetc_vf_id_table, 242 .probe = enetc_vf_probe, 243 .remove = enetc_vf_remove, 244 }; 245 module_pci_driver(enetc_vf_driver); 246 247 MODULE_DESCRIPTION(ENETC_DRV_NAME_STR); 248 MODULE_LICENSE("Dual BSD/GPL"); 249