drivers/net/ethernet/freescale/enetc/enetc_vf.c

   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");