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
enetc_vf_setup_tc(struct net_device * ndev,enum tc_setup_type type,void * type_data)96 static int enetc_vf_setup_tc(struct net_device *ndev, enum tc_setup_type type,
97 void *type_data)
98 {
99 switch (type) {
100 case TC_SETUP_QDISC_MQPRIO:
101 return enetc_setup_tc_mqprio(ndev, type_data);
102 default:
103 return -EOPNOTSUPP;
104 }
105 }
106
107 /* Probing/ Init */
108 static const struct net_device_ops enetc_ndev_ops = {
109 .ndo_open = enetc_open,
110 .ndo_stop = enetc_close,
111 .ndo_start_xmit = enetc_xmit,
112 .ndo_get_stats = enetc_get_stats,
113 .ndo_set_mac_address = enetc_vf_set_mac_addr,
114 .ndo_set_features = enetc_vf_set_features,
115 .ndo_eth_ioctl = enetc_ioctl,
116 .ndo_setup_tc = enetc_vf_setup_tc,
117 };
118
enetc_vf_netdev_setup(struct enetc_si * si,struct net_device * ndev,const struct net_device_ops * ndev_ops)119 static void enetc_vf_netdev_setup(struct enetc_si *si, struct net_device *ndev,
120 const struct net_device_ops *ndev_ops)
121 {
122 struct enetc_ndev_priv *priv = netdev_priv(ndev);
123
124 SET_NETDEV_DEV(ndev, &si->pdev->dev);
125 priv->ndev = ndev;
126 priv->si = si;
127 priv->dev = &si->pdev->dev;
128 si->ndev = ndev;
129
130 priv->msg_enable = (NETIF_MSG_IFUP << 1) - 1;
131 ndev->netdev_ops = ndev_ops;
132 enetc_set_ethtool_ops(ndev);
133 ndev->watchdog_timeo = 5 * HZ;
134 ndev->max_mtu = ENETC_MAX_MTU;
135
136 ndev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
137 NETIF_F_HW_VLAN_CTAG_TX |
138 NETIF_F_HW_VLAN_CTAG_RX |
139 NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6;
140 ndev->features = NETIF_F_HIGHDMA | NETIF_F_SG | NETIF_F_RXCSUM |
141 NETIF_F_HW_VLAN_CTAG_TX |
142 NETIF_F_HW_VLAN_CTAG_RX |
143 NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6;
144 ndev->vlan_features = NETIF_F_SG | NETIF_F_HW_CSUM |
145 NETIF_F_TSO | NETIF_F_TSO6;
146
147 if (si->num_rss)
148 ndev->hw_features |= NETIF_F_RXHASH;
149
150 /* pick up primary MAC address from SI */
151 enetc_load_primary_mac_addr(&si->hw, ndev);
152 }
153
enetc_vf_probe(struct pci_dev * pdev,const struct pci_device_id * ent)154 static int enetc_vf_probe(struct pci_dev *pdev,
155 const struct pci_device_id *ent)
156 {
157 struct enetc_ndev_priv *priv;
158 struct net_device *ndev;
159 struct enetc_si *si;
160 int err;
161
162 err = enetc_pci_probe(pdev, KBUILD_MODNAME, 0);
163 if (err)
164 return dev_err_probe(&pdev->dev, err, "PCI probing failed\n");
165
166 si = pci_get_drvdata(pdev);
167
168 enetc_get_si_caps(si);
169
170 ndev = alloc_etherdev_mq(sizeof(*priv), ENETC_MAX_NUM_TXQS);
171 if (!ndev) {
172 err = -ENOMEM;
173 dev_err(&pdev->dev, "netdev creation failed\n");
174 goto err_alloc_netdev;
175 }
176
177 enetc_vf_netdev_setup(si, ndev, &enetc_ndev_ops);
178
179 priv = netdev_priv(ndev);
180
181 enetc_init_si_rings_params(priv);
182
183 err = enetc_setup_cbdr(priv->dev, &si->hw, ENETC_CBDR_DEFAULT_SIZE,
184 &si->cbd_ring);
185 if (err)
186 goto err_setup_cbdr;
187
188 err = enetc_alloc_si_resources(priv);
189 if (err) {
190 dev_err(&pdev->dev, "SI resource alloc failed\n");
191 goto err_alloc_si_res;
192 }
193
194 err = enetc_configure_si(priv);
195 if (err) {
196 dev_err(&pdev->dev, "Failed to configure SI\n");
197 goto err_config_si;
198 }
199
200 err = enetc_alloc_msix(priv);
201 if (err) {
202 dev_err(&pdev->dev, "MSIX alloc failed\n");
203 goto err_alloc_msix;
204 }
205
206 err = register_netdev(ndev);
207 if (err)
208 goto err_reg_netdev;
209
210 netif_carrier_off(ndev);
211
212 return 0;
213
214 err_reg_netdev:
215 enetc_free_msix(priv);
216 err_config_si:
217 err_alloc_msix:
218 enetc_free_si_resources(priv);
219 err_alloc_si_res:
220 enetc_teardown_cbdr(&si->cbd_ring);
221 err_setup_cbdr:
222 si->ndev = NULL;
223 free_netdev(ndev);
224 err_alloc_netdev:
225 enetc_pci_remove(pdev);
226
227 return err;
228 }
229
enetc_vf_remove(struct pci_dev * pdev)230 static void enetc_vf_remove(struct pci_dev *pdev)
231 {
232 struct enetc_si *si = pci_get_drvdata(pdev);
233 struct enetc_ndev_priv *priv;
234
235 priv = netdev_priv(si->ndev);
236 unregister_netdev(si->ndev);
237
238 enetc_free_msix(priv);
239
240 enetc_free_si_resources(priv);
241 enetc_teardown_cbdr(&si->cbd_ring);
242
243 free_netdev(si->ndev);
244
245 enetc_pci_remove(pdev);
246 }
247
248 static const struct pci_device_id enetc_vf_id_table[] = {
249 { PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_DEV_ID_VF) },
250 { 0, } /* End of table. */
251 };
252 MODULE_DEVICE_TABLE(pci, enetc_vf_id_table);
253
254 static struct pci_driver enetc_vf_driver = {
255 .name = KBUILD_MODNAME,
256 .id_table = enetc_vf_id_table,
257 .probe = enetc_vf_probe,
258 .remove = enetc_vf_remove,
259 };
260 module_pci_driver(enetc_vf_driver);
261
262 MODULE_DESCRIPTION(ENETC_DRV_NAME_STR);
263 MODULE_LICENSE("Dual BSD/GPL");
264