1 // SPDX-License-Identifier: GPL-2.0+
2 /* Microchip Sparx5 Switch driver
3 *
4 * Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries.
5 */
6
7 #include "sparx5_main_regs.h"
8 #include "sparx5_main.h"
9 #include "sparx5_port.h"
10 #include "sparx5_tc.h"
11
12 /* The IFH bit position of the first VSTAX bit. This is because the
13 * VSTAX bit positions in Data sheet is starting from zero.
14 */
15 #define VSTAX 73
16
17 #define ifh_encode_bitfield(ifh, value, pos, _width) \
18 ({ \
19 u32 width = (_width); \
20 \
21 /* Max width is 5 bytes - 40 bits. In worst case this will
22 * spread over 6 bytes - 48 bits
23 */ \
24 compiletime_assert(width <= 40, \
25 "Unsupported width, must be <= 40"); \
26 __ifh_encode_bitfield((ifh), (value), (pos), width); \
27 })
28
__ifh_encode_bitfield(void * ifh,u64 value,u32 pos,u32 width)29 static void __ifh_encode_bitfield(void *ifh, u64 value, u32 pos, u32 width)
30 {
31 u8 *ifh_hdr = ifh;
32 /* Calculate the Start IFH byte position of this IFH bit position */
33 u32 byte = (35 - (pos / 8));
34 /* Calculate the Start bit position in the Start IFH byte */
35 u32 bit = (pos % 8);
36 u64 encode = GENMASK_ULL(bit + width - 1, bit) & (value << bit);
37
38 /* The b0-b7 goes into the start IFH byte */
39 if (encode & 0xFF)
40 ifh_hdr[byte] |= (u8)((encode & 0xFF));
41 /* The b8-b15 goes into the next IFH byte */
42 if (encode & 0xFF00)
43 ifh_hdr[byte - 1] |= (u8)((encode & 0xFF00) >> 8);
44 /* The b16-b23 goes into the next IFH byte */
45 if (encode & 0xFF0000)
46 ifh_hdr[byte - 2] |= (u8)((encode & 0xFF0000) >> 16);
47 /* The b24-b31 goes into the next IFH byte */
48 if (encode & 0xFF000000)
49 ifh_hdr[byte - 3] |= (u8)((encode & 0xFF000000) >> 24);
50 /* The b32-b39 goes into the next IFH byte */
51 if (encode & 0xFF00000000)
52 ifh_hdr[byte - 4] |= (u8)((encode & 0xFF00000000) >> 32);
53 /* The b40-b47 goes into the next IFH byte */
54 if (encode & 0xFF0000000000)
55 ifh_hdr[byte - 5] |= (u8)((encode & 0xFF0000000000) >> 40);
56 }
57
sparx5_set_port_ifh(struct sparx5 * sparx5,void * ifh_hdr,u16 portno)58 void sparx5_set_port_ifh(struct sparx5 *sparx5, void *ifh_hdr, u16 portno)
59 {
60 /* VSTAX.RSV = 1. MSBit must be 1 */
61 ifh_encode_bitfield(ifh_hdr, 1, VSTAX + 79, 1);
62 /* VSTAX.INGR_DROP_MODE = Enable. Don't make head-of-line blocking */
63 ifh_encode_bitfield(ifh_hdr, 1, VSTAX + 55, 1);
64 /* MISC.CPU_MASK/DPORT = Destination port */
65 ifh_encode_bitfield(ifh_hdr, portno, 29, 8);
66 /* MISC.PIPELINE_PT */
67 ifh_encode_bitfield(ifh_hdr, is_sparx5(sparx5) ? 16 : 17, 37, 5);
68 /* MISC.PIPELINE_ACT */
69 ifh_encode_bitfield(ifh_hdr, 1, 42, 3);
70 /* FWD.SRC_PORT = CPU */
71 ifh_encode_bitfield(ifh_hdr, sparx5_get_pgid(sparx5, SPX5_PORT_CPU_0),
72 46, is_sparx5(sparx5) ? 7 : 6);
73 /* FWD.SFLOW_ID (disable SFlow sampling) */
74 ifh_encode_bitfield(ifh_hdr, 124, is_sparx5(sparx5) ? 57 : 56, 7);
75 /* FWD.UPDATE_FCS = Enable. Enforce update of FCS. */
76 ifh_encode_bitfield(ifh_hdr, 1, is_sparx5(sparx5) ? 67 : 66, 1);
77 }
78
sparx5_set_port_ifh_rew_op(void * ifh_hdr,u32 rew_op)79 void sparx5_set_port_ifh_rew_op(void *ifh_hdr, u32 rew_op)
80 {
81 ifh_encode_bitfield(ifh_hdr, rew_op, VSTAX + 32, 10);
82 }
83
sparx5_set_port_ifh_pdu_type(struct sparx5 * sparx5,void * ifh_hdr,u32 pdu_type)84 void sparx5_set_port_ifh_pdu_type(struct sparx5 *sparx5, void *ifh_hdr,
85 u32 pdu_type)
86 {
87 ifh_encode_bitfield(ifh_hdr, pdu_type, is_sparx5(sparx5) ? 191 : 190,
88 4);
89 }
90
sparx5_set_port_ifh_pdu_w16_offset(struct sparx5 * sparx5,void * ifh_hdr,u32 pdu_w16_offset)91 void sparx5_set_port_ifh_pdu_w16_offset(struct sparx5 *sparx5, void *ifh_hdr,
92 u32 pdu_w16_offset)
93 {
94 ifh_encode_bitfield(ifh_hdr, pdu_w16_offset,
95 is_sparx5(sparx5) ? 195 : 194, 6);
96 }
97
sparx5_set_port_ifh_timestamp(struct sparx5 * sparx5,void * ifh_hdr,u64 timestamp)98 void sparx5_set_port_ifh_timestamp(struct sparx5 *sparx5, void *ifh_hdr,
99 u64 timestamp)
100 {
101 ifh_encode_bitfield(ifh_hdr, timestamp, 232,
102 is_sparx5(sparx5) ? 40 : 38);
103 }
104
sparx5_port_open(struct net_device * ndev)105 static int sparx5_port_open(struct net_device *ndev)
106 {
107 struct sparx5_port *port = netdev_priv(ndev);
108 int err = 0;
109
110 sparx5_port_enable(port, true);
111 err = phylink_of_phy_connect(port->phylink, port->of_node, 0);
112 if (err) {
113 netdev_err(ndev, "Could not attach to PHY\n");
114 goto err_connect;
115 }
116
117 phylink_start(port->phylink);
118
119 if (!ndev->phydev) {
120 /* power up serdes */
121 port->conf.power_down = false;
122 if (port->conf.serdes_reset)
123 err = sparx5_serdes_set(port->sparx5, port, &port->conf);
124 else
125 err = phy_power_on(port->serdes);
126 if (err) {
127 netdev_err(ndev, "%s failed\n", __func__);
128 goto out_power;
129 }
130 }
131
132 return 0;
133
134 out_power:
135 phylink_stop(port->phylink);
136 phylink_disconnect_phy(port->phylink);
137 err_connect:
138 sparx5_port_enable(port, false);
139
140 return err;
141 }
142
sparx5_port_stop(struct net_device * ndev)143 static int sparx5_port_stop(struct net_device *ndev)
144 {
145 struct sparx5_port *port = netdev_priv(ndev);
146 int err = 0;
147
148 sparx5_port_enable(port, false);
149 phylink_stop(port->phylink);
150 phylink_disconnect_phy(port->phylink);
151
152 if (!ndev->phydev) {
153 /* power down serdes */
154 port->conf.power_down = true;
155 if (port->conf.serdes_reset)
156 err = sparx5_serdes_set(port->sparx5, port, &port->conf);
157 else
158 err = phy_power_off(port->serdes);
159 if (err)
160 netdev_err(ndev, "%s failed\n", __func__);
161 }
162 return 0;
163 }
164
sparx5_set_rx_mode(struct net_device * dev)165 static void sparx5_set_rx_mode(struct net_device *dev)
166 {
167 struct sparx5_port *port = netdev_priv(dev);
168 struct sparx5 *sparx5 = port->sparx5;
169
170 if (!test_bit(port->portno, sparx5->bridge_mask))
171 __dev_mc_sync(dev, sparx5_mc_sync, sparx5_mc_unsync);
172 }
173
sparx5_port_get_phys_port_name(struct net_device * dev,char * buf,size_t len)174 static int sparx5_port_get_phys_port_name(struct net_device *dev,
175 char *buf, size_t len)
176 {
177 struct sparx5_port *port = netdev_priv(dev);
178 int ret;
179
180 ret = snprintf(buf, len, "p%d", port->portno);
181 if (ret >= len)
182 return -EINVAL;
183
184 return 0;
185 }
186
sparx5_set_mac_address(struct net_device * dev,void * p)187 static int sparx5_set_mac_address(struct net_device *dev, void *p)
188 {
189 struct sparx5_port *port = netdev_priv(dev);
190 struct sparx5 *sparx5 = port->sparx5;
191 const struct sockaddr *addr = p;
192
193 if (!is_valid_ether_addr(addr->sa_data))
194 return -EADDRNOTAVAIL;
195
196 /* Remove current */
197 sparx5_mact_forget(sparx5, dev->dev_addr, port->pvid);
198
199 /* Add new */
200 sparx5_mact_learn(sparx5, sparx5_get_pgid(sparx5, PGID_CPU),
201 addr->sa_data, port->pvid);
202
203 /* Record the address */
204 eth_hw_addr_set(dev, addr->sa_data);
205
206 return 0;
207 }
208
sparx5_get_port_parent_id(struct net_device * dev,struct netdev_phys_item_id * ppid)209 static int sparx5_get_port_parent_id(struct net_device *dev,
210 struct netdev_phys_item_id *ppid)
211 {
212 struct sparx5_port *sparx5_port = netdev_priv(dev);
213 struct sparx5 *sparx5 = sparx5_port->sparx5;
214
215 ppid->id_len = sizeof(sparx5->base_mac);
216 memcpy(&ppid->id, &sparx5->base_mac, ppid->id_len);
217
218 return 0;
219 }
220
sparx5_port_hwtstamp_get(struct net_device * dev,struct kernel_hwtstamp_config * cfg)221 static int sparx5_port_hwtstamp_get(struct net_device *dev,
222 struct kernel_hwtstamp_config *cfg)
223 {
224 struct sparx5_port *sparx5_port = netdev_priv(dev);
225 struct sparx5 *sparx5 = sparx5_port->sparx5;
226
227 if (!sparx5->ptp)
228 return -EOPNOTSUPP;
229
230 sparx5_ptp_hwtstamp_get(sparx5_port, cfg);
231
232 return 0;
233 }
234
sparx5_port_hwtstamp_set(struct net_device * dev,struct kernel_hwtstamp_config * cfg,struct netlink_ext_ack * extack)235 static int sparx5_port_hwtstamp_set(struct net_device *dev,
236 struct kernel_hwtstamp_config *cfg,
237 struct netlink_ext_ack *extack)
238 {
239 struct sparx5_port *sparx5_port = netdev_priv(dev);
240 struct sparx5 *sparx5 = sparx5_port->sparx5;
241
242 if (!sparx5->ptp)
243 return -EOPNOTSUPP;
244
245 return sparx5_ptp_hwtstamp_set(sparx5_port, cfg, extack);
246 }
247
248 static const struct net_device_ops sparx5_port_netdev_ops = {
249 .ndo_open = sparx5_port_open,
250 .ndo_stop = sparx5_port_stop,
251 .ndo_start_xmit = sparx5_port_xmit_impl,
252 .ndo_set_rx_mode = sparx5_set_rx_mode,
253 .ndo_get_phys_port_name = sparx5_port_get_phys_port_name,
254 .ndo_set_mac_address = sparx5_set_mac_address,
255 .ndo_validate_addr = eth_validate_addr,
256 .ndo_get_stats64 = sparx5_get_stats64,
257 .ndo_get_port_parent_id = sparx5_get_port_parent_id,
258 .ndo_eth_ioctl = phy_do_ioctl,
259 .ndo_setup_tc = sparx5_port_setup_tc,
260 .ndo_hwtstamp_get = sparx5_port_hwtstamp_get,
261 .ndo_hwtstamp_set = sparx5_port_hwtstamp_set,
262 };
263
sparx5_netdevice_check(const struct net_device * dev)264 bool sparx5_netdevice_check(const struct net_device *dev)
265 {
266 return dev && (dev->netdev_ops == &sparx5_port_netdev_ops);
267 }
268
sparx5_create_netdev(struct sparx5 * sparx5,u32 portno)269 struct net_device *sparx5_create_netdev(struct sparx5 *sparx5, u32 portno)
270 {
271 struct sparx5_port *spx5_port;
272 struct net_device *ndev;
273
274 ndev = devm_alloc_etherdev_mqs(sparx5->dev, sizeof(struct sparx5_port),
275 SPX5_PRIOS, 1);
276 if (!ndev)
277 return ERR_PTR(-ENOMEM);
278
279 ndev->hw_features |= NETIF_F_HW_TC;
280 ndev->features |= NETIF_F_HW_TC;
281
282 SET_NETDEV_DEV(ndev, sparx5->dev);
283 spx5_port = netdev_priv(ndev);
284 spx5_port->ndev = ndev;
285 spx5_port->sparx5 = sparx5;
286 spx5_port->portno = portno;
287
288 ndev->netdev_ops = &sparx5_port_netdev_ops;
289 ndev->ethtool_ops = &sparx5_ethtool_ops;
290
291 eth_hw_addr_gen(ndev, sparx5->base_mac, portno + 1);
292
293 return ndev;
294 }
295
sparx5_register_netdevs(struct sparx5 * sparx5)296 int sparx5_register_netdevs(struct sparx5 *sparx5)
297 {
298 int portno;
299 int err;
300
301 for (portno = 0; portno < sparx5->data->consts->n_ports; portno++)
302 if (sparx5->ports[portno]) {
303 err = register_netdev(sparx5->ports[portno]->ndev);
304 if (err) {
305 dev_err(sparx5->dev,
306 "port: %02u: netdev registration failed\n",
307 portno);
308 return err;
309 }
310 sparx5_port_inj_timer_setup(sparx5->ports[portno]);
311 }
312 return 0;
313 }
314
sparx5_destroy_netdevs(struct sparx5 * sparx5)315 void sparx5_destroy_netdevs(struct sparx5 *sparx5)
316 {
317 struct sparx5_port *port;
318 int portno;
319
320 for (portno = 0; portno < sparx5->data->consts->n_ports; portno++) {
321 port = sparx5->ports[portno];
322 if (port && port->phylink) {
323 /* Disconnect the phy */
324 rtnl_lock();
325 sparx5_port_stop(port->ndev);
326 phylink_disconnect_phy(port->phylink);
327 rtnl_unlock();
328 phylink_destroy(port->phylink);
329 port->phylink = NULL;
330 }
331 }
332 }
333
sparx5_unregister_netdevs(struct sparx5 * sparx5)334 void sparx5_unregister_netdevs(struct sparx5 *sparx5)
335 {
336 int portno;
337
338 for (portno = 0; portno < sparx5->data->consts->n_ports; portno++)
339 if (sparx5->ports[portno])
340 unregister_netdev(sparx5->ports[portno]->ndev);
341 }
342