1
2
3
4#include <linux/netdevice.h>
5#include <linux/etherdevice.h>
6#include <linux/ethtool.h>
7#include <linux/i2c.h>
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/mod_devicetable.h>
11#include <linux/types.h>
12
13#include "core.h"
14#include "core_env.h"
15#include "i2c.h"
16
17static const char mlxsw_m_driver_name[] = "mlxsw_minimal";
18
19struct mlxsw_m_port;
20
21struct mlxsw_m {
22 struct mlxsw_m_port **ports;
23 int *module_to_port;
24 struct mlxsw_core *core;
25 const struct mlxsw_bus_info *bus_info;
26 u8 base_mac[ETH_ALEN];
27 u8 max_ports;
28};
29
30struct mlxsw_m_port {
31 struct net_device *dev;
32 struct mlxsw_m *mlxsw_m;
33 u8 local_port;
34 u8 module;
35};
36
37static int mlxsw_m_base_mac_get(struct mlxsw_m *mlxsw_m)
38{
39 char spad_pl[MLXSW_REG_SPAD_LEN] = {0};
40 int err;
41
42 err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(spad), spad_pl);
43 if (err)
44 return err;
45 mlxsw_reg_spad_base_mac_memcpy_from(spad_pl, mlxsw_m->base_mac);
46 return 0;
47}
48
49static int mlxsw_m_port_dummy_open_stop(struct net_device *dev)
50{
51 return 0;
52}
53
54static struct devlink_port *
55mlxsw_m_port_get_devlink_port(struct net_device *dev)
56{
57 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
58 struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
59
60 return mlxsw_core_port_devlink_port_get(mlxsw_m->core,
61 mlxsw_m_port->local_port);
62}
63
64static const struct net_device_ops mlxsw_m_port_netdev_ops = {
65 .ndo_open = mlxsw_m_port_dummy_open_stop,
66 .ndo_stop = mlxsw_m_port_dummy_open_stop,
67 .ndo_get_devlink_port = mlxsw_m_port_get_devlink_port,
68};
69
70static void mlxsw_m_module_get_drvinfo(struct net_device *dev,
71 struct ethtool_drvinfo *drvinfo)
72{
73 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
74 struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
75
76 strlcpy(drvinfo->driver, mlxsw_m->bus_info->device_kind,
77 sizeof(drvinfo->driver));
78 snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
79 "%d.%d.%d",
80 mlxsw_m->bus_info->fw_rev.major,
81 mlxsw_m->bus_info->fw_rev.minor,
82 mlxsw_m->bus_info->fw_rev.subminor);
83 strlcpy(drvinfo->bus_info, mlxsw_m->bus_info->device_name,
84 sizeof(drvinfo->bus_info));
85}
86
87static int mlxsw_m_get_module_info(struct net_device *netdev,
88 struct ethtool_modinfo *modinfo)
89{
90 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
91 struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;
92
93 return mlxsw_env_get_module_info(core, mlxsw_m_port->module, modinfo);
94}
95
96static int
97mlxsw_m_get_module_eeprom(struct net_device *netdev, struct ethtool_eeprom *ee,
98 u8 *data)
99{
100 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
101 struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;
102
103 return mlxsw_env_get_module_eeprom(netdev, core, mlxsw_m_port->module,
104 ee, data);
105}
106
107static const struct ethtool_ops mlxsw_m_port_ethtool_ops = {
108 .get_drvinfo = mlxsw_m_module_get_drvinfo,
109 .get_module_info = mlxsw_m_get_module_info,
110 .get_module_eeprom = mlxsw_m_get_module_eeprom,
111};
112
113static int
114mlxsw_m_port_module_info_get(struct mlxsw_m *mlxsw_m, u8 local_port,
115 u8 *p_module, u8 *p_width)
116{
117 char pmlp_pl[MLXSW_REG_PMLP_LEN];
118 int err;
119
120 mlxsw_reg_pmlp_pack(pmlp_pl, local_port);
121 err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(pmlp), pmlp_pl);
122 if (err)
123 return err;
124 *p_module = mlxsw_reg_pmlp_module_get(pmlp_pl, 0);
125 *p_width = mlxsw_reg_pmlp_width_get(pmlp_pl);
126
127 return 0;
128}
129
130static int
131mlxsw_m_port_dev_addr_get(struct mlxsw_m_port *mlxsw_m_port)
132{
133 struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
134 struct net_device *dev = mlxsw_m_port->dev;
135 char ppad_pl[MLXSW_REG_PPAD_LEN];
136 int err;
137
138 mlxsw_reg_ppad_pack(ppad_pl, false, 0);
139 err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(ppad), ppad_pl);
140 if (err)
141 return err;
142 mlxsw_reg_ppad_mac_memcpy_from(ppad_pl, dev->dev_addr);
143
144
145
146
147 dev->dev_addr[ETH_ALEN - 1] += mlxsw_m_port->module + 1;
148 return 0;
149}
150
151static int
152mlxsw_m_port_create(struct mlxsw_m *mlxsw_m, u8 local_port, u8 module)
153{
154 struct mlxsw_m_port *mlxsw_m_port;
155 struct net_device *dev;
156 int err;
157
158 err = mlxsw_core_port_init(mlxsw_m->core, local_port,
159 module + 1, false, 0,
160 mlxsw_m->base_mac,
161 sizeof(mlxsw_m->base_mac));
162 if (err) {
163 dev_err(mlxsw_m->bus_info->dev, "Port %d: Failed to init core port\n",
164 local_port);
165 return err;
166 }
167
168 dev = alloc_etherdev(sizeof(struct mlxsw_m_port));
169 if (!dev) {
170 err = -ENOMEM;
171 goto err_alloc_etherdev;
172 }
173
174 SET_NETDEV_DEV(dev, mlxsw_m->bus_info->dev);
175 mlxsw_m_port = netdev_priv(dev);
176 mlxsw_m_port->dev = dev;
177 mlxsw_m_port->mlxsw_m = mlxsw_m;
178 mlxsw_m_port->local_port = local_port;
179 mlxsw_m_port->module = module;
180
181 dev->netdev_ops = &mlxsw_m_port_netdev_ops;
182 dev->ethtool_ops = &mlxsw_m_port_ethtool_ops;
183
184 err = mlxsw_m_port_dev_addr_get(mlxsw_m_port);
185 if (err) {
186 dev_err(mlxsw_m->bus_info->dev, "Port %d: Unable to get port mac address\n",
187 mlxsw_m_port->local_port);
188 goto err_dev_addr_get;
189 }
190
191 netif_carrier_off(dev);
192 mlxsw_m->ports[local_port] = mlxsw_m_port;
193 err = register_netdev(dev);
194 if (err) {
195 dev_err(mlxsw_m->bus_info->dev, "Port %d: Failed to register netdev\n",
196 mlxsw_m_port->local_port);
197 goto err_register_netdev;
198 }
199
200 mlxsw_core_port_eth_set(mlxsw_m->core, mlxsw_m_port->local_port,
201 mlxsw_m_port, dev);
202
203 return 0;
204
205err_register_netdev:
206 mlxsw_m->ports[local_port] = NULL;
207 free_netdev(dev);
208err_dev_addr_get:
209err_alloc_etherdev:
210 mlxsw_core_port_fini(mlxsw_m->core, local_port);
211 return err;
212}
213
214static void mlxsw_m_port_remove(struct mlxsw_m *mlxsw_m, u8 local_port)
215{
216 struct mlxsw_m_port *mlxsw_m_port = mlxsw_m->ports[local_port];
217
218 mlxsw_core_port_clear(mlxsw_m->core, local_port, mlxsw_m);
219 unregister_netdev(mlxsw_m_port->dev);
220 mlxsw_m->ports[local_port] = NULL;
221 free_netdev(mlxsw_m_port->dev);
222 mlxsw_core_port_fini(mlxsw_m->core, local_port);
223}
224
225static int mlxsw_m_port_module_map(struct mlxsw_m *mlxsw_m, u8 local_port,
226 u8 *last_module)
227{
228 u8 module, width;
229 int err;
230
231
232 err = mlxsw_m_port_module_info_get(mlxsw_m, local_port, &module,
233 &width);
234 if (err)
235 return err;
236
237 if (!width)
238 return 0;
239
240 if (module == *last_module)
241 return 0;
242 *last_module = module;
243 mlxsw_m->module_to_port[module] = ++mlxsw_m->max_ports;
244
245 return 0;
246}
247
248static void mlxsw_m_port_module_unmap(struct mlxsw_m *mlxsw_m, u8 module)
249{
250 mlxsw_m->module_to_port[module] = -1;
251}
252
253static int mlxsw_m_ports_create(struct mlxsw_m *mlxsw_m)
254{
255 unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core);
256 u8 last_module = max_ports;
257 int i;
258 int err;
259
260 mlxsw_m->ports = kcalloc(max_ports, sizeof(*mlxsw_m->ports),
261 GFP_KERNEL);
262 if (!mlxsw_m->ports)
263 return -ENOMEM;
264
265 mlxsw_m->module_to_port = kmalloc_array(max_ports, sizeof(int),
266 GFP_KERNEL);
267 if (!mlxsw_m->module_to_port) {
268 err = -ENOMEM;
269 goto err_module_to_port_alloc;
270 }
271
272
273 for (i = 0; i < max_ports; i++)
274 mlxsw_m->module_to_port[i] = -1;
275
276
277 for (i = 1; i < max_ports; i++) {
278 err = mlxsw_m_port_module_map(mlxsw_m, i, &last_module);
279 if (err)
280 goto err_module_to_port_map;
281 }
282
283
284 for (i = 0; i < mlxsw_m->max_ports; i++) {
285 if (mlxsw_m->module_to_port[i] > 0) {
286 err = mlxsw_m_port_create(mlxsw_m,
287 mlxsw_m->module_to_port[i],
288 i);
289 if (err)
290 goto err_module_to_port_create;
291 }
292 }
293
294 return 0;
295
296err_module_to_port_create:
297 for (i--; i >= 0; i--) {
298 if (mlxsw_m->module_to_port[i] > 0)
299 mlxsw_m_port_remove(mlxsw_m,
300 mlxsw_m->module_to_port[i]);
301 }
302 i = max_ports;
303err_module_to_port_map:
304 for (i--; i > 0; i--)
305 mlxsw_m_port_module_unmap(mlxsw_m, i);
306 kfree(mlxsw_m->module_to_port);
307err_module_to_port_alloc:
308 kfree(mlxsw_m->ports);
309 return err;
310}
311
312static void mlxsw_m_ports_remove(struct mlxsw_m *mlxsw_m)
313{
314 int i;
315
316 for (i = 0; i < mlxsw_m->max_ports; i++) {
317 if (mlxsw_m->module_to_port[i] > 0) {
318 mlxsw_m_port_remove(mlxsw_m,
319 mlxsw_m->module_to_port[i]);
320 mlxsw_m_port_module_unmap(mlxsw_m, i);
321 }
322 }
323
324 kfree(mlxsw_m->module_to_port);
325 kfree(mlxsw_m->ports);
326}
327
328static int mlxsw_m_init(struct mlxsw_core *mlxsw_core,
329 const struct mlxsw_bus_info *mlxsw_bus_info)
330{
331 struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core);
332 int err;
333
334 mlxsw_m->core = mlxsw_core;
335 mlxsw_m->bus_info = mlxsw_bus_info;
336
337 err = mlxsw_m_base_mac_get(mlxsw_m);
338 if (err) {
339 dev_err(mlxsw_m->bus_info->dev, "Failed to get base mac\n");
340 return err;
341 }
342
343 err = mlxsw_m_ports_create(mlxsw_m);
344 if (err) {
345 dev_err(mlxsw_m->bus_info->dev, "Failed to create ports\n");
346 return err;
347 }
348
349 return 0;
350}
351
352static void mlxsw_m_fini(struct mlxsw_core *mlxsw_core)
353{
354 struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core);
355
356 mlxsw_m_ports_remove(mlxsw_m);
357}
358
359static const struct mlxsw_config_profile mlxsw_m_config_profile;
360
361static struct mlxsw_driver mlxsw_m_driver = {
362 .kind = mlxsw_m_driver_name,
363 .priv_size = sizeof(struct mlxsw_m),
364 .init = mlxsw_m_init,
365 .fini = mlxsw_m_fini,
366 .profile = &mlxsw_m_config_profile,
367 .res_query_enabled = true,
368};
369
370static const struct i2c_device_id mlxsw_m_i2c_id[] = {
371 { "mlxsw_minimal", 0},
372 { },
373};
374
375static struct i2c_driver mlxsw_m_i2c_driver = {
376 .driver.name = "mlxsw_minimal",
377 .class = I2C_CLASS_HWMON,
378 .id_table = mlxsw_m_i2c_id,
379};
380
381static int __init mlxsw_m_module_init(void)
382{
383 int err;
384
385 err = mlxsw_core_driver_register(&mlxsw_m_driver);
386 if (err)
387 return err;
388
389 err = mlxsw_i2c_driver_register(&mlxsw_m_i2c_driver);
390 if (err)
391 goto err_i2c_driver_register;
392
393 return 0;
394
395err_i2c_driver_register:
396 mlxsw_core_driver_unregister(&mlxsw_m_driver);
397
398 return err;
399}
400
401static void __exit mlxsw_m_module_exit(void)
402{
403 mlxsw_i2c_driver_unregister(&mlxsw_m_i2c_driver);
404 mlxsw_core_driver_unregister(&mlxsw_m_driver);
405}
406
407module_init(mlxsw_m_module_init);
408module_exit(mlxsw_m_module_exit);
409
410MODULE_LICENSE("Dual BSD/GPL");
411MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
412MODULE_DESCRIPTION("Mellanox minimal driver");
413MODULE_DEVICE_TABLE(i2c, mlxsw_m_i2c_id);
414
