1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2 /* Copyright 2024 NXP */
3
4 #include <linux/fsl/enetc_mdio.h>
5 #include <linux/of_mdio.h>
6 #include <linux/of_net.h>
7
8 #include "enetc_pf_common.h"
9
enetc_set_si_hw_addr(struct enetc_pf * pf,int si,const u8 * mac_addr)10 static void enetc_set_si_hw_addr(struct enetc_pf *pf, int si,
11 const u8 *mac_addr)
12 {
13 struct enetc_hw *hw = &pf->si->hw;
14
15 pf->ops->set_si_primary_mac(hw, si, mac_addr);
16 }
17
enetc_get_si_hw_addr(struct enetc_pf * pf,int si,u8 * mac_addr)18 static void enetc_get_si_hw_addr(struct enetc_pf *pf, int si, u8 *mac_addr)
19 {
20 struct enetc_hw *hw = &pf->si->hw;
21
22 pf->ops->get_si_primary_mac(hw, si, mac_addr);
23 }
24
enetc_pf_set_mac_addr(struct net_device * ndev,void * addr)25 int enetc_pf_set_mac_addr(struct net_device *ndev, void *addr)
26 {
27 struct enetc_ndev_priv *priv = netdev_priv(ndev);
28 struct enetc_pf *pf = enetc_si_priv(priv->si);
29 struct sockaddr *saddr = addr;
30
31 if (!is_valid_ether_addr(saddr->sa_data))
32 return -EADDRNOTAVAIL;
33
34 eth_hw_addr_set(ndev, saddr->sa_data);
35 enetc_set_si_hw_addr(pf, 0, saddr->sa_data);
36
37 return 0;
38 }
39 EXPORT_SYMBOL_GPL(enetc_pf_set_mac_addr);
40
enetc_setup_mac_address(struct device_node * np,struct enetc_pf * pf,int si)41 static int enetc_setup_mac_address(struct device_node *np, struct enetc_pf *pf,
42 int si)
43 {
44 struct device *dev = &pf->si->pdev->dev;
45 u8 mac_addr[ETH_ALEN] = { 0 };
46 int err;
47
48 /* (1) try to get the MAC address from the device tree */
49 if (np) {
50 err = of_get_mac_address(np, mac_addr);
51 if (err == -EPROBE_DEFER)
52 return err;
53 }
54
55 /* (2) bootloader supplied MAC address */
56 if (is_zero_ether_addr(mac_addr))
57 enetc_get_si_hw_addr(pf, si, mac_addr);
58
59 /* (3) choose a random one */
60 if (is_zero_ether_addr(mac_addr)) {
61 eth_random_addr(mac_addr);
62 dev_info(dev, "no MAC address specified for SI%d, using %pM\n",
63 si, mac_addr);
64 }
65
66 enetc_set_si_hw_addr(pf, si, mac_addr);
67
68 return 0;
69 }
70
enetc_setup_mac_addresses(struct device_node * np,struct enetc_pf * pf)71 int enetc_setup_mac_addresses(struct device_node *np, struct enetc_pf *pf)
72 {
73 int err, i;
74
75 /* The PF might take its MAC from the device tree */
76 err = enetc_setup_mac_address(np, pf, 0);
77 if (err)
78 return err;
79
80 for (i = 0; i < pf->total_vfs; i++) {
81 err = enetc_setup_mac_address(NULL, pf, i + 1);
82 if (err)
83 return err;
84 }
85
86 return 0;
87 }
88 EXPORT_SYMBOL_GPL(enetc_setup_mac_addresses);
89
enetc_pf_netdev_setup(struct enetc_si * si,struct net_device * ndev,const struct net_device_ops * ndev_ops)90 void enetc_pf_netdev_setup(struct enetc_si *si, struct net_device *ndev,
91 const struct net_device_ops *ndev_ops)
92 {
93 struct enetc_ndev_priv *priv = netdev_priv(ndev);
94 struct enetc_pf *pf = enetc_si_priv(si);
95
96 SET_NETDEV_DEV(ndev, &si->pdev->dev);
97 priv->ndev = ndev;
98 priv->si = si;
99 priv->dev = &si->pdev->dev;
100 si->ndev = ndev;
101
102 priv->msg_enable = (NETIF_MSG_WOL << 1) - 1;
103 priv->sysclk_freq = si->drvdata->sysclk_freq;
104 priv->max_frags = si->drvdata->max_frags;
105 ndev->netdev_ops = ndev_ops;
106 enetc_set_ethtool_ops(ndev);
107 ndev->watchdog_timeo = 5 * HZ;
108 ndev->max_mtu = ENETC_MAX_MTU;
109
110 ndev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
111 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
112 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_LOOPBACK |
113 NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6 |
114 NETIF_F_GSO_UDP_L4;
115 ndev->features = NETIF_F_HIGHDMA | NETIF_F_SG | NETIF_F_RXCSUM |
116 NETIF_F_HW_VLAN_CTAG_TX |
117 NETIF_F_HW_VLAN_CTAG_RX |
118 NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6 |
119 NETIF_F_GSO_UDP_L4;
120 ndev->vlan_features = NETIF_F_SG | NETIF_F_HW_CSUM |
121 NETIF_F_TSO | NETIF_F_TSO6;
122
123 ndev->priv_flags |= IFF_UNICAST_FLT;
124
125 if (si->drvdata->tx_csum)
126 priv->active_offloads |= ENETC_F_TXCSUM;
127
128 if (si->hw_features & ENETC_SI_F_LSO)
129 priv->active_offloads |= ENETC_F_LSO;
130
131 /* TODO: currently, i.MX95 ENETC driver does not support advanced features */
132 if (!is_enetc_rev1(si)) {
133 ndev->hw_features &= ~(NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_LOOPBACK);
134 goto end;
135 }
136
137 if (si->num_rss)
138 ndev->hw_features |= NETIF_F_RXHASH;
139
140 ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
141 NETDEV_XDP_ACT_NDO_XMIT | NETDEV_XDP_ACT_RX_SG |
142 NETDEV_XDP_ACT_NDO_XMIT_SG;
143
144 if (si->hw_features & ENETC_SI_F_PSFP && pf->ops->enable_psfp &&
145 !pf->ops->enable_psfp(priv)) {
146 priv->active_offloads |= ENETC_F_QCI;
147 ndev->features |= NETIF_F_HW_TC;
148 ndev->hw_features |= NETIF_F_HW_TC;
149 }
150
151 end:
152 /* pick up primary MAC address from SI */
153 enetc_load_primary_mac_addr(&si->hw, ndev);
154 }
155 EXPORT_SYMBOL_GPL(enetc_pf_netdev_setup);
156
enetc_mdio_probe(struct enetc_pf * pf,struct device_node * np)157 static int enetc_mdio_probe(struct enetc_pf *pf, struct device_node *np)
158 {
159 struct device *dev = &pf->si->pdev->dev;
160 struct enetc_mdio_priv *mdio_priv;
161 struct mii_bus *bus;
162 int err;
163
164 bus = devm_mdiobus_alloc_size(dev, sizeof(*mdio_priv));
165 if (!bus)
166 return -ENOMEM;
167
168 bus->name = "Freescale ENETC MDIO Bus";
169 bus->read = enetc_mdio_read_c22;
170 bus->write = enetc_mdio_write_c22;
171 bus->read_c45 = enetc_mdio_read_c45;
172 bus->write_c45 = enetc_mdio_write_c45;
173 bus->parent = dev;
174 mdio_priv = bus->priv;
175 mdio_priv->hw = &pf->si->hw;
176 mdio_priv->mdio_base = ENETC_EMDIO_BASE;
177 snprintf(bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
178
179 err = of_mdiobus_register(bus, np);
180 if (err)
181 return dev_err_probe(dev, err, "cannot register MDIO bus\n");
182
183 pf->mdio = bus;
184
185 return 0;
186 }
187
enetc_mdio_remove(struct enetc_pf * pf)188 static void enetc_mdio_remove(struct enetc_pf *pf)
189 {
190 if (pf->mdio)
191 mdiobus_unregister(pf->mdio);
192 }
193
enetc_imdio_create(struct enetc_pf * pf)194 static int enetc_imdio_create(struct enetc_pf *pf)
195 {
196 struct device *dev = &pf->si->pdev->dev;
197 struct enetc_mdio_priv *mdio_priv;
198 struct phylink_pcs *phylink_pcs;
199 struct mii_bus *bus;
200 int err;
201
202 if (!pf->ops->create_pcs) {
203 dev_err(dev, "Creating PCS is not supported\n");
204
205 return -EOPNOTSUPP;
206 }
207
208 bus = mdiobus_alloc_size(sizeof(*mdio_priv));
209 if (!bus)
210 return -ENOMEM;
211
212 bus->name = "Freescale ENETC internal MDIO Bus";
213 bus->read = enetc_mdio_read_c22;
214 bus->write = enetc_mdio_write_c22;
215 bus->read_c45 = enetc_mdio_read_c45;
216 bus->write_c45 = enetc_mdio_write_c45;
217 bus->parent = dev;
218 bus->phy_mask = ~0;
219 mdio_priv = bus->priv;
220 mdio_priv->hw = &pf->si->hw;
221 mdio_priv->mdio_base = ENETC_PM_IMDIO_BASE;
222 snprintf(bus->id, MII_BUS_ID_SIZE, "%s-imdio", dev_name(dev));
223
224 err = mdiobus_register(bus);
225 if (err) {
226 dev_err(dev, "cannot register internal MDIO bus (%d)\n", err);
227 goto free_mdio_bus;
228 }
229
230 phylink_pcs = pf->ops->create_pcs(pf, bus);
231 if (IS_ERR(phylink_pcs)) {
232 err = PTR_ERR(phylink_pcs);
233 dev_err(dev, "cannot create lynx pcs (%d)\n", err);
234 goto unregister_mdiobus;
235 }
236
237 pf->imdio = bus;
238 pf->pcs = phylink_pcs;
239
240 return 0;
241
242 unregister_mdiobus:
243 mdiobus_unregister(bus);
244 free_mdio_bus:
245 mdiobus_free(bus);
246 return err;
247 }
248
enetc_imdio_remove(struct enetc_pf * pf)249 static void enetc_imdio_remove(struct enetc_pf *pf)
250 {
251 if (pf->pcs && pf->ops->destroy_pcs)
252 pf->ops->destroy_pcs(pf->pcs);
253
254 if (pf->imdio) {
255 mdiobus_unregister(pf->imdio);
256 mdiobus_free(pf->imdio);
257 }
258 }
259
enetc_port_has_pcs(struct enetc_pf * pf)260 static bool enetc_port_has_pcs(struct enetc_pf *pf)
261 {
262 return (pf->if_mode == PHY_INTERFACE_MODE_SGMII ||
263 pf->if_mode == PHY_INTERFACE_MODE_1000BASEX ||
264 pf->if_mode == PHY_INTERFACE_MODE_2500BASEX ||
265 pf->if_mode == PHY_INTERFACE_MODE_USXGMII);
266 }
267
enetc_mdiobus_create(struct enetc_pf * pf,struct device_node * node)268 int enetc_mdiobus_create(struct enetc_pf *pf, struct device_node *node)
269 {
270 struct device_node *mdio_np;
271 int err;
272
273 mdio_np = of_get_child_by_name(node, "mdio");
274 if (mdio_np) {
275 err = enetc_mdio_probe(pf, mdio_np);
276
277 of_node_put(mdio_np);
278 if (err)
279 return err;
280 }
281
282 if (enetc_port_has_pcs(pf)) {
283 err = enetc_imdio_create(pf);
284 if (err) {
285 enetc_mdio_remove(pf);
286 return err;
287 }
288 }
289
290 return 0;
291 }
292 EXPORT_SYMBOL_GPL(enetc_mdiobus_create);
293
enetc_mdiobus_destroy(struct enetc_pf * pf)294 void enetc_mdiobus_destroy(struct enetc_pf *pf)
295 {
296 enetc_mdio_remove(pf);
297 enetc_imdio_remove(pf);
298 }
299 EXPORT_SYMBOL_GPL(enetc_mdiobus_destroy);
300
enetc_phylink_create(struct enetc_ndev_priv * priv,struct device_node * node,const struct phylink_mac_ops * ops)301 int enetc_phylink_create(struct enetc_ndev_priv *priv, struct device_node *node,
302 const struct phylink_mac_ops *ops)
303 {
304 struct enetc_pf *pf = enetc_si_priv(priv->si);
305 struct phylink *phylink;
306 int err;
307
308 pf->phylink_config.dev = &priv->ndev->dev;
309 pf->phylink_config.type = PHYLINK_NETDEV;
310 pf->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
311 MAC_10 | MAC_100 | MAC_1000 | MAC_2500FD;
312
313 __set_bit(PHY_INTERFACE_MODE_INTERNAL,
314 pf->phylink_config.supported_interfaces);
315 __set_bit(PHY_INTERFACE_MODE_SGMII,
316 pf->phylink_config.supported_interfaces);
317 __set_bit(PHY_INTERFACE_MODE_1000BASEX,
318 pf->phylink_config.supported_interfaces);
319 __set_bit(PHY_INTERFACE_MODE_2500BASEX,
320 pf->phylink_config.supported_interfaces);
321 __set_bit(PHY_INTERFACE_MODE_USXGMII,
322 pf->phylink_config.supported_interfaces);
323 phy_interface_set_rgmii(pf->phylink_config.supported_interfaces);
324
325 phylink = phylink_create(&pf->phylink_config, of_fwnode_handle(node),
326 pf->if_mode, ops);
327 if (IS_ERR(phylink)) {
328 err = PTR_ERR(phylink);
329 return err;
330 }
331
332 priv->phylink = phylink;
333
334 return 0;
335 }
336 EXPORT_SYMBOL_GPL(enetc_phylink_create);
337
enetc_phylink_destroy(struct enetc_ndev_priv * priv)338 void enetc_phylink_destroy(struct enetc_ndev_priv *priv)
339 {
340 phylink_destroy(priv->phylink);
341 }
342 EXPORT_SYMBOL_GPL(enetc_phylink_destroy);
343
344 MODULE_DESCRIPTION("NXP ENETC PF common functionality driver");
345 MODULE_LICENSE("Dual BSD/GPL");
346