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 */
enetc_msg_vsi_write_msg(struct enetc_hw * hw,struct enetc_msg_swbd * msg)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
enetc_msg_vsi_send(struct enetc_si * si,struct enetc_msg_swbd * msg)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
enetc_msg_vsi_set_primary_mac_addr(struct enetc_ndev_priv * priv,struct sockaddr * saddr)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
enetc_vf_set_mac_addr(struct net_device * ndev,void * addr)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
enetc_vf_set_features(struct net_device * ndev,netdev_features_t features)88 static int enetc_vf_set_features(struct net_device *ndev,
89 netdev_features_t features)
90 {
91 enetc_set_features(ndev, features);
92
93 return 0;
94 }
95
96 /* Probing/ Init */
97 static const struct net_device_ops enetc_ndev_ops = {
98 .ndo_open = enetc_open,
99 .ndo_stop = enetc_close,
100 .ndo_start_xmit = enetc_xmit,
101 .ndo_get_stats = enetc_get_stats,
102 .ndo_set_mac_address = enetc_vf_set_mac_addr,
103 .ndo_set_features = enetc_vf_set_features,
104 .ndo_do_ioctl = enetc_ioctl,
105 .ndo_setup_tc = enetc_setup_tc,
106 };
107
enetc_vf_netdev_setup(struct enetc_si * si,struct net_device * ndev,const struct net_device_ops * ndev_ops)108 static void enetc_vf_netdev_setup(struct enetc_si *si, struct net_device *ndev,
109 const struct net_device_ops *ndev_ops)
110 {
111 struct enetc_ndev_priv *priv = netdev_priv(ndev);
112
113 SET_NETDEV_DEV(ndev, &si->pdev->dev);
114 priv->ndev = ndev;
115 priv->si = si;
116 priv->dev = &si->pdev->dev;
117 si->ndev = ndev;
118
119 priv->msg_enable = (NETIF_MSG_IFUP << 1) - 1;
120 ndev->netdev_ops = ndev_ops;
121 enetc_set_ethtool_ops(ndev);
122 ndev->watchdog_timeo = 5 * HZ;
123 ndev->max_mtu = ENETC_MAX_MTU;
124
125 ndev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | NETIF_F_HW_CSUM |
126 NETIF_F_HW_VLAN_CTAG_TX |
127 NETIF_F_HW_VLAN_CTAG_RX;
128 ndev->features = NETIF_F_HIGHDMA | NETIF_F_SG |
129 NETIF_F_RXCSUM | NETIF_F_HW_CSUM |
130 NETIF_F_HW_VLAN_CTAG_TX |
131 NETIF_F_HW_VLAN_CTAG_RX;
132
133 if (si->num_rss)
134 ndev->hw_features |= NETIF_F_RXHASH;
135
136 if (si->errata & ENETC_ERR_TXCSUM) {
137 ndev->hw_features &= ~NETIF_F_HW_CSUM;
138 ndev->features &= ~NETIF_F_HW_CSUM;
139 }
140
141 /* pick up primary MAC address from SI */
142 enetc_get_primary_mac_addr(&si->hw, ndev->dev_addr);
143 }
144
enetc_vf_probe(struct pci_dev * pdev,const struct pci_device_id * ent)145 static int enetc_vf_probe(struct pci_dev *pdev,
146 const struct pci_device_id *ent)
147 {
148 struct enetc_ndev_priv *priv;
149 struct net_device *ndev;
150 struct enetc_si *si;
151 int err;
152
153 err = enetc_pci_probe(pdev, KBUILD_MODNAME, 0);
154 if (err) {
155 dev_err(&pdev->dev, "PCI probing failed\n");
156 return err;
157 }
158
159 si = pci_get_drvdata(pdev);
160
161 enetc_get_si_caps(si);
162
163 ndev = alloc_etherdev_mq(sizeof(*priv), ENETC_MAX_NUM_TXQS);
164 if (!ndev) {
165 err = -ENOMEM;
166 dev_err(&pdev->dev, "netdev creation failed\n");
167 goto err_alloc_netdev;
168 }
169
170 enetc_vf_netdev_setup(si, ndev, &enetc_ndev_ops);
171
172 priv = netdev_priv(ndev);
173
174 enetc_init_si_rings_params(priv);
175
176 err = enetc_alloc_si_resources(priv);
177 if (err) {
178 dev_err(&pdev->dev, "SI resource alloc failed\n");
179 goto err_alloc_si_res;
180 }
181
182 err = enetc_configure_si(priv);
183 if (err) {
184 dev_err(&pdev->dev, "Failed to configure SI\n");
185 goto err_config_si;
186 }
187
188 err = enetc_alloc_msix(priv);
189 if (err) {
190 dev_err(&pdev->dev, "MSIX alloc failed\n");
191 goto err_alloc_msix;
192 }
193
194 err = register_netdev(ndev);
195 if (err)
196 goto err_reg_netdev;
197
198 netif_carrier_off(ndev);
199
200 return 0;
201
202 err_reg_netdev:
203 enetc_free_msix(priv);
204 err_config_si:
205 err_alloc_msix:
206 enetc_free_si_resources(priv);
207 err_alloc_si_res:
208 si->ndev = NULL;
209 free_netdev(ndev);
210 err_alloc_netdev:
211 enetc_pci_remove(pdev);
212
213 return err;
214 }
215
enetc_vf_remove(struct pci_dev * pdev)216 static void enetc_vf_remove(struct pci_dev *pdev)
217 {
218 struct enetc_si *si = pci_get_drvdata(pdev);
219 struct enetc_ndev_priv *priv;
220
221 priv = netdev_priv(si->ndev);
222 unregister_netdev(si->ndev);
223
224 enetc_free_msix(priv);
225
226 enetc_free_si_resources(priv);
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