Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 1 | /* |
| 2 | * net/dsa/dsa.c - Hardware switch handling |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 3 | * Copyright (c) 2008-2009 Marvell Semiconductor |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 4 | * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org> |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/list.h> |
| 13 | #include <linux/netdevice.h> |
| 14 | #include <linux/platform_device.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 15 | #include <linux/slab.h> |
Paul Gortmaker | 3a9a231 | 2011-05-27 09:12:25 -0400 | [diff] [blame] | 16 | #include <linux/module.h> |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 17 | #include <net/dsa.h> |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 18 | #include <linux/of.h> |
| 19 | #include <linux/of_mdio.h> |
| 20 | #include <linux/of_platform.h> |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 21 | #include "dsa_priv.h" |
| 22 | |
| 23 | char dsa_driver_version[] = "0.1"; |
| 24 | |
| 25 | |
| 26 | /* switch driver registration ***********************************************/ |
| 27 | static DEFINE_MUTEX(dsa_switch_drivers_mutex); |
| 28 | static LIST_HEAD(dsa_switch_drivers); |
| 29 | |
| 30 | void register_switch_driver(struct dsa_switch_driver *drv) |
| 31 | { |
| 32 | mutex_lock(&dsa_switch_drivers_mutex); |
| 33 | list_add_tail(&drv->list, &dsa_switch_drivers); |
| 34 | mutex_unlock(&dsa_switch_drivers_mutex); |
| 35 | } |
Ben Hutchings | ad293b8 | 2011-11-25 14:34:07 +0000 | [diff] [blame] | 36 | EXPORT_SYMBOL_GPL(register_switch_driver); |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 37 | |
| 38 | void unregister_switch_driver(struct dsa_switch_driver *drv) |
| 39 | { |
| 40 | mutex_lock(&dsa_switch_drivers_mutex); |
| 41 | list_del_init(&drv->list); |
| 42 | mutex_unlock(&dsa_switch_drivers_mutex); |
| 43 | } |
Ben Hutchings | ad293b8 | 2011-11-25 14:34:07 +0000 | [diff] [blame] | 44 | EXPORT_SYMBOL_GPL(unregister_switch_driver); |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 45 | |
| 46 | static struct dsa_switch_driver * |
| 47 | dsa_switch_probe(struct mii_bus *bus, int sw_addr, char **_name) |
| 48 | { |
| 49 | struct dsa_switch_driver *ret; |
| 50 | struct list_head *list; |
| 51 | char *name; |
| 52 | |
| 53 | ret = NULL; |
| 54 | name = NULL; |
| 55 | |
| 56 | mutex_lock(&dsa_switch_drivers_mutex); |
| 57 | list_for_each(list, &dsa_switch_drivers) { |
| 58 | struct dsa_switch_driver *drv; |
| 59 | |
| 60 | drv = list_entry(list, struct dsa_switch_driver, list); |
| 61 | |
| 62 | name = drv->probe(bus, sw_addr); |
| 63 | if (name != NULL) { |
| 64 | ret = drv; |
| 65 | break; |
| 66 | } |
| 67 | } |
| 68 | mutex_unlock(&dsa_switch_drivers_mutex); |
| 69 | |
| 70 | *_name = name; |
| 71 | |
| 72 | return ret; |
| 73 | } |
| 74 | |
| 75 | |
| 76 | /* basic switch operations **************************************************/ |
| 77 | static struct dsa_switch * |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 78 | dsa_switch_setup(struct dsa_switch_tree *dst, int index, |
| 79 | struct device *parent, struct mii_bus *bus) |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 80 | { |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 81 | struct dsa_chip_data *pd = dst->pd->chip + index; |
| 82 | struct dsa_switch_driver *drv; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 83 | struct dsa_switch *ds; |
| 84 | int ret; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 85 | char *name; |
| 86 | int i; |
Florian Fainelli | f9bf5a2 | 2013-01-21 09:58:51 +0000 | [diff] [blame] | 87 | bool valid_name_found = false; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 88 | |
| 89 | /* |
| 90 | * Probe for switch model. |
| 91 | */ |
| 92 | drv = dsa_switch_probe(bus, pd->sw_addr, &name); |
| 93 | if (drv == NULL) { |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 94 | printk(KERN_ERR "%s[%d]: could not detect attached switch\n", |
| 95 | dst->master_netdev->name, index); |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 96 | return ERR_PTR(-EINVAL); |
| 97 | } |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 98 | printk(KERN_INFO "%s[%d]: detected a %s switch\n", |
| 99 | dst->master_netdev->name, index, name); |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 100 | |
| 101 | |
| 102 | /* |
| 103 | * Allocate and initialise switch state. |
| 104 | */ |
| 105 | ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL); |
| 106 | if (ds == NULL) |
| 107 | return ERR_PTR(-ENOMEM); |
| 108 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 109 | ds->dst = dst; |
| 110 | ds->index = index; |
| 111 | ds->pd = dst->pd->chip + index; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 112 | ds->drv = drv; |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 113 | ds->master_mii_bus = bus; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 114 | |
| 115 | |
| 116 | /* |
| 117 | * Validate supplied switch configuration. |
| 118 | */ |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 119 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
| 120 | char *name; |
| 121 | |
| 122 | name = pd->port_names[i]; |
| 123 | if (name == NULL) |
| 124 | continue; |
| 125 | |
| 126 | if (!strcmp(name, "cpu")) { |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 127 | if (dst->cpu_switch != -1) { |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 128 | printk(KERN_ERR "multiple cpu ports?!\n"); |
| 129 | ret = -EINVAL; |
| 130 | goto out; |
| 131 | } |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 132 | dst->cpu_switch = index; |
| 133 | dst->cpu_port = i; |
| 134 | } else if (!strcmp(name, "dsa")) { |
| 135 | ds->dsa_port_mask |= 1 << i; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 136 | } else { |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 137 | ds->phys_port_mask |= 1 << i; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 138 | } |
Florian Fainelli | f9bf5a2 | 2013-01-21 09:58:51 +0000 | [diff] [blame] | 139 | valid_name_found = true; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 140 | } |
| 141 | |
Florian Fainelli | f9bf5a2 | 2013-01-21 09:58:51 +0000 | [diff] [blame] | 142 | if (!valid_name_found && i == DSA_MAX_PORTS) { |
| 143 | ret = -EINVAL; |
| 144 | goto out; |
| 145 | } |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 146 | |
| 147 | /* |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 148 | * If the CPU connects to this switch, set the switch tree |
| 149 | * tagging protocol to the preferred tagging format of this |
| 150 | * switch. |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 151 | */ |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 152 | if (ds->dst->cpu_switch == index) |
| 153 | ds->dst->tag_protocol = drv->tag_protocol; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 154 | |
| 155 | |
| 156 | /* |
| 157 | * Do basic register setup. |
| 158 | */ |
| 159 | ret = drv->setup(ds); |
| 160 | if (ret < 0) |
| 161 | goto out; |
| 162 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 163 | ret = drv->set_addr(ds, dst->master_netdev->dev_addr); |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 164 | if (ret < 0) |
| 165 | goto out; |
| 166 | |
| 167 | ds->slave_mii_bus = mdiobus_alloc(); |
| 168 | if (ds->slave_mii_bus == NULL) { |
| 169 | ret = -ENOMEM; |
| 170 | goto out; |
| 171 | } |
| 172 | dsa_slave_mii_bus_init(ds); |
| 173 | |
| 174 | ret = mdiobus_register(ds->slave_mii_bus); |
| 175 | if (ret < 0) |
| 176 | goto out_free; |
| 177 | |
| 178 | |
| 179 | /* |
| 180 | * Create network devices for physical switch ports. |
| 181 | */ |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 182 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
| 183 | struct net_device *slave_dev; |
| 184 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 185 | if (!(ds->phys_port_mask & (1 << i))) |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 186 | continue; |
| 187 | |
| 188 | slave_dev = dsa_slave_create(ds, parent, i, pd->port_names[i]); |
| 189 | if (slave_dev == NULL) { |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 190 | printk(KERN_ERR "%s[%d]: can't create dsa " |
| 191 | "slave device for port %d(%s)\n", |
| 192 | dst->master_netdev->name, |
| 193 | index, i, pd->port_names[i]); |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 194 | continue; |
| 195 | } |
| 196 | |
| 197 | ds->ports[i] = slave_dev; |
| 198 | } |
| 199 | |
| 200 | return ds; |
| 201 | |
| 202 | out_free: |
| 203 | mdiobus_free(ds->slave_mii_bus); |
| 204 | out: |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 205 | kfree(ds); |
| 206 | return ERR_PTR(ret); |
| 207 | } |
| 208 | |
| 209 | static void dsa_switch_destroy(struct dsa_switch *ds) |
| 210 | { |
| 211 | } |
| 212 | |
| 213 | |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 214 | /* link polling *************************************************************/ |
| 215 | static void dsa_link_poll_work(struct work_struct *ugly) |
| 216 | { |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 217 | struct dsa_switch_tree *dst; |
| 218 | int i; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 219 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 220 | dst = container_of(ugly, struct dsa_switch_tree, link_poll_work); |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 221 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 222 | for (i = 0; i < dst->pd->nr_chips; i++) { |
| 223 | struct dsa_switch *ds = dst->ds[i]; |
| 224 | |
| 225 | if (ds != NULL && ds->drv->poll_link != NULL) |
| 226 | ds->drv->poll_link(ds); |
| 227 | } |
| 228 | |
| 229 | mod_timer(&dst->link_poll_timer, round_jiffies(jiffies + HZ)); |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 230 | } |
| 231 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 232 | static void dsa_link_poll_timer(unsigned long _dst) |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 233 | { |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 234 | struct dsa_switch_tree *dst = (void *)_dst; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 235 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 236 | schedule_work(&dst->link_poll_work); |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 237 | } |
| 238 | |
| 239 | |
| 240 | /* platform driver init and cleanup *****************************************/ |
| 241 | static int dev_is_class(struct device *dev, void *class) |
| 242 | { |
| 243 | if (dev->class != NULL && !strcmp(dev->class->name, class)) |
| 244 | return 1; |
| 245 | |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | static struct device *dev_find_class(struct device *parent, char *class) |
| 250 | { |
| 251 | if (dev_is_class(parent, class)) { |
| 252 | get_device(parent); |
| 253 | return parent; |
| 254 | } |
| 255 | |
| 256 | return device_find_child(parent, class, dev_is_class); |
| 257 | } |
| 258 | |
| 259 | static struct mii_bus *dev_to_mii_bus(struct device *dev) |
| 260 | { |
| 261 | struct device *d; |
| 262 | |
| 263 | d = dev_find_class(dev, "mdio_bus"); |
| 264 | if (d != NULL) { |
| 265 | struct mii_bus *bus; |
| 266 | |
| 267 | bus = to_mii_bus(d); |
| 268 | put_device(d); |
| 269 | |
| 270 | return bus; |
| 271 | } |
| 272 | |
| 273 | return NULL; |
| 274 | } |
| 275 | |
| 276 | static struct net_device *dev_to_net_device(struct device *dev) |
| 277 | { |
| 278 | struct device *d; |
| 279 | |
| 280 | d = dev_find_class(dev, "net"); |
| 281 | if (d != NULL) { |
| 282 | struct net_device *nd; |
| 283 | |
| 284 | nd = to_net_dev(d); |
| 285 | dev_hold(nd); |
| 286 | put_device(d); |
| 287 | |
| 288 | return nd; |
| 289 | } |
| 290 | |
| 291 | return NULL; |
| 292 | } |
| 293 | |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 294 | #ifdef CONFIG_OF |
| 295 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, |
| 296 | struct dsa_chip_data *cd, |
| 297 | int chip_index, |
| 298 | struct device_node *link) |
| 299 | { |
| 300 | int ret; |
| 301 | const __be32 *reg; |
| 302 | int link_port_addr; |
| 303 | int link_sw_addr; |
| 304 | struct device_node *parent_sw; |
| 305 | int len; |
| 306 | |
| 307 | parent_sw = of_get_parent(link); |
| 308 | if (!parent_sw) |
| 309 | return -EINVAL; |
| 310 | |
| 311 | reg = of_get_property(parent_sw, "reg", &len); |
| 312 | if (!reg || (len != sizeof(*reg) * 2)) |
| 313 | return -EINVAL; |
| 314 | |
| 315 | link_sw_addr = be32_to_cpup(reg + 1); |
| 316 | |
| 317 | if (link_sw_addr >= pd->nr_chips) |
| 318 | return -EINVAL; |
| 319 | |
| 320 | /* First time routing table allocation */ |
| 321 | if (!cd->rtable) { |
| 322 | cd->rtable = kmalloc(pd->nr_chips * sizeof(s8), GFP_KERNEL); |
| 323 | if (!cd->rtable) |
| 324 | return -ENOMEM; |
| 325 | |
| 326 | /* default to no valid uplink/downlink */ |
| 327 | memset(cd->rtable, -1, pd->nr_chips * sizeof(s8)); |
| 328 | } |
| 329 | |
| 330 | reg = of_get_property(link, "reg", NULL); |
| 331 | if (!reg) { |
| 332 | ret = -EINVAL; |
| 333 | goto out; |
| 334 | } |
| 335 | |
| 336 | link_port_addr = be32_to_cpup(reg); |
| 337 | |
| 338 | cd->rtable[link_sw_addr] = link_port_addr; |
| 339 | |
| 340 | return 0; |
| 341 | out: |
| 342 | kfree(cd->rtable); |
| 343 | return ret; |
| 344 | } |
| 345 | |
Florian Fainelli | 2116824 | 2013-03-25 05:03:39 +0000 | [diff] [blame] | 346 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) |
| 347 | { |
| 348 | int i; |
| 349 | int port_index; |
| 350 | |
| 351 | for (i = 0; i < pd->nr_chips; i++) { |
| 352 | port_index = 0; |
Florian Fainelli | 5f64a7d | 2013-03-25 05:03:40 +0000 | [diff] [blame^] | 353 | while (port_index < DSA_MAX_PORTS) { |
| 354 | if (pd->chip[i].port_names[port_index]) |
| 355 | kfree(pd->chip[i].port_names[port_index]); |
| 356 | port_index++; |
| 357 | } |
Florian Fainelli | 2116824 | 2013-03-25 05:03:39 +0000 | [diff] [blame] | 358 | kfree(pd->chip[i].rtable); |
| 359 | } |
| 360 | kfree(pd->chip); |
| 361 | } |
| 362 | |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 363 | static int dsa_of_probe(struct platform_device *pdev) |
| 364 | { |
| 365 | struct device_node *np = pdev->dev.of_node; |
| 366 | struct device_node *child, *mdio, *ethernet, *port, *link; |
| 367 | struct mii_bus *mdio_bus; |
| 368 | struct platform_device *ethernet_dev; |
| 369 | struct dsa_platform_data *pd; |
| 370 | struct dsa_chip_data *cd; |
| 371 | const char *port_name; |
| 372 | int chip_index, port_index; |
| 373 | const unsigned int *sw_addr, *port_reg; |
Florian Fainelli | 2116824 | 2013-03-25 05:03:39 +0000 | [diff] [blame] | 374 | int ret; |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 375 | |
| 376 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); |
| 377 | if (!mdio) |
| 378 | return -EINVAL; |
| 379 | |
| 380 | mdio_bus = of_mdio_find_bus(mdio); |
| 381 | if (!mdio_bus) |
| 382 | return -EINVAL; |
| 383 | |
| 384 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); |
| 385 | if (!ethernet) |
| 386 | return -EINVAL; |
| 387 | |
| 388 | ethernet_dev = of_find_device_by_node(ethernet); |
| 389 | if (!ethernet_dev) |
| 390 | return -ENODEV; |
| 391 | |
| 392 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); |
| 393 | if (!pd) |
| 394 | return -ENOMEM; |
| 395 | |
| 396 | pdev->dev.platform_data = pd; |
| 397 | pd->netdev = ðernet_dev->dev; |
| 398 | pd->nr_chips = of_get_child_count(np); |
| 399 | if (pd->nr_chips > DSA_MAX_SWITCHES) |
| 400 | pd->nr_chips = DSA_MAX_SWITCHES; |
| 401 | |
| 402 | pd->chip = kzalloc(pd->nr_chips * sizeof(struct dsa_chip_data), |
| 403 | GFP_KERNEL); |
| 404 | if (!pd->chip) { |
| 405 | ret = -ENOMEM; |
| 406 | goto out_free; |
| 407 | } |
| 408 | |
| 409 | chip_index = 0; |
| 410 | for_each_available_child_of_node(np, child) { |
| 411 | cd = &pd->chip[chip_index]; |
| 412 | |
| 413 | cd->mii_bus = &mdio_bus->dev; |
| 414 | |
| 415 | sw_addr = of_get_property(child, "reg", NULL); |
| 416 | if (!sw_addr) |
| 417 | continue; |
| 418 | |
| 419 | cd->sw_addr = be32_to_cpup(sw_addr); |
| 420 | if (cd->sw_addr > PHY_MAX_ADDR) |
| 421 | continue; |
| 422 | |
| 423 | for_each_available_child_of_node(child, port) { |
| 424 | port_reg = of_get_property(port, "reg", NULL); |
| 425 | if (!port_reg) |
| 426 | continue; |
| 427 | |
| 428 | port_index = be32_to_cpup(port_reg); |
| 429 | |
| 430 | port_name = of_get_property(port, "label", NULL); |
| 431 | if (!port_name) |
| 432 | continue; |
| 433 | |
| 434 | cd->port_names[port_index] = kstrdup(port_name, |
| 435 | GFP_KERNEL); |
| 436 | if (!cd->port_names[port_index]) { |
| 437 | ret = -ENOMEM; |
| 438 | goto out_free_chip; |
| 439 | } |
| 440 | |
| 441 | link = of_parse_phandle(port, "link", 0); |
| 442 | |
| 443 | if (!strcmp(port_name, "dsa") && link && |
| 444 | pd->nr_chips > 1) { |
| 445 | ret = dsa_of_setup_routing_table(pd, cd, |
| 446 | chip_index, link); |
| 447 | if (ret) |
| 448 | goto out_free_chip; |
| 449 | } |
| 450 | |
| 451 | if (port_index == DSA_MAX_PORTS) |
| 452 | break; |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | return 0; |
| 457 | |
| 458 | out_free_chip: |
Florian Fainelli | 2116824 | 2013-03-25 05:03:39 +0000 | [diff] [blame] | 459 | dsa_of_free_platform_data(pd); |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 460 | out_free: |
| 461 | kfree(pd); |
| 462 | pdev->dev.platform_data = NULL; |
| 463 | return ret; |
| 464 | } |
| 465 | |
| 466 | static void dsa_of_remove(struct platform_device *pdev) |
| 467 | { |
| 468 | struct dsa_platform_data *pd = pdev->dev.platform_data; |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 469 | |
| 470 | if (!pdev->dev.of_node) |
| 471 | return; |
| 472 | |
Florian Fainelli | 2116824 | 2013-03-25 05:03:39 +0000 | [diff] [blame] | 473 | dsa_of_free_platform_data(pd); |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 474 | kfree(pd); |
| 475 | } |
| 476 | #else |
| 477 | static inline int dsa_of_probe(struct platform_device *pdev) |
| 478 | { |
| 479 | return 0; |
| 480 | } |
| 481 | |
| 482 | static inline void dsa_of_remove(struct platform_device *pdev) |
| 483 | { |
| 484 | } |
| 485 | #endif |
| 486 | |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 487 | static int dsa_probe(struct platform_device *pdev) |
| 488 | { |
| 489 | static int dsa_version_printed; |
| 490 | struct dsa_platform_data *pd = pdev->dev.platform_data; |
| 491 | struct net_device *dev; |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 492 | struct dsa_switch_tree *dst; |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 493 | int i, ret; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 494 | |
| 495 | if (!dsa_version_printed++) |
| 496 | printk(KERN_NOTICE "Distributed Switch Architecture " |
| 497 | "driver version %s\n", dsa_driver_version); |
| 498 | |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 499 | if (pdev->dev.of_node) { |
| 500 | ret = dsa_of_probe(pdev); |
| 501 | if (ret) |
| 502 | return ret; |
| 503 | |
| 504 | pd = pdev->dev.platform_data; |
| 505 | } |
| 506 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 507 | if (pd == NULL || pd->netdev == NULL) |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 508 | return -EINVAL; |
| 509 | |
| 510 | dev = dev_to_net_device(pd->netdev); |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 511 | if (dev == NULL) { |
| 512 | ret = -EINVAL; |
| 513 | goto out; |
| 514 | } |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 515 | |
| 516 | if (dev->dsa_ptr != NULL) { |
| 517 | dev_put(dev); |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 518 | ret = -EEXIST; |
| 519 | goto out; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 520 | } |
| 521 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 522 | dst = kzalloc(sizeof(*dst), GFP_KERNEL); |
| 523 | if (dst == NULL) { |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 524 | dev_put(dev); |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 525 | ret = -ENOMEM; |
| 526 | goto out; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 527 | } |
| 528 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 529 | platform_set_drvdata(pdev, dst); |
| 530 | |
| 531 | dst->pd = pd; |
| 532 | dst->master_netdev = dev; |
| 533 | dst->cpu_switch = -1; |
| 534 | dst->cpu_port = -1; |
| 535 | |
| 536 | for (i = 0; i < pd->nr_chips; i++) { |
| 537 | struct mii_bus *bus; |
| 538 | struct dsa_switch *ds; |
| 539 | |
| 540 | bus = dev_to_mii_bus(pd->chip[i].mii_bus); |
| 541 | if (bus == NULL) { |
| 542 | printk(KERN_ERR "%s[%d]: no mii bus found for " |
| 543 | "dsa switch\n", dev->name, i); |
| 544 | continue; |
| 545 | } |
| 546 | |
| 547 | ds = dsa_switch_setup(dst, i, &pdev->dev, bus); |
| 548 | if (IS_ERR(ds)) { |
| 549 | printk(KERN_ERR "%s[%d]: couldn't create dsa switch " |
| 550 | "instance (error %ld)\n", dev->name, i, |
| 551 | PTR_ERR(ds)); |
| 552 | continue; |
| 553 | } |
| 554 | |
| 555 | dst->ds[i] = ds; |
| 556 | if (ds->drv->poll_link != NULL) |
| 557 | dst->link_poll_needed = 1; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 558 | } |
| 559 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 560 | /* |
| 561 | * If we use a tagging format that doesn't have an ethertype |
| 562 | * field, make sure that all packets from this point on get |
| 563 | * sent to the tag format's receive function. |
| 564 | */ |
| 565 | wmb(); |
| 566 | dev->dsa_ptr = (void *)dst; |
| 567 | |
| 568 | if (dst->link_poll_needed) { |
| 569 | INIT_WORK(&dst->link_poll_work, dsa_link_poll_work); |
| 570 | init_timer(&dst->link_poll_timer); |
| 571 | dst->link_poll_timer.data = (unsigned long)dst; |
| 572 | dst->link_poll_timer.function = dsa_link_poll_timer; |
| 573 | dst->link_poll_timer.expires = round_jiffies(jiffies + HZ); |
| 574 | add_timer(&dst->link_poll_timer); |
| 575 | } |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 576 | |
| 577 | return 0; |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 578 | |
| 579 | out: |
| 580 | dsa_of_remove(pdev); |
| 581 | |
| 582 | return ret; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | static int dsa_remove(struct platform_device *pdev) |
| 586 | { |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 587 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); |
| 588 | int i; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 589 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 590 | if (dst->link_poll_needed) |
| 591 | del_timer_sync(&dst->link_poll_timer); |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 592 | |
Tejun Heo | 4382973 | 2012-08-20 14:51:24 -0700 | [diff] [blame] | 593 | flush_work(&dst->link_poll_work); |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 594 | |
Lennert Buytenhek | e84665c | 2009-03-20 09:52:09 +0000 | [diff] [blame] | 595 | for (i = 0; i < dst->pd->nr_chips; i++) { |
| 596 | struct dsa_switch *ds = dst->ds[i]; |
| 597 | |
| 598 | if (ds != NULL) |
| 599 | dsa_switch_destroy(ds); |
| 600 | } |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 601 | |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 602 | dsa_of_remove(pdev); |
| 603 | |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 604 | return 0; |
| 605 | } |
| 606 | |
| 607 | static void dsa_shutdown(struct platform_device *pdev) |
| 608 | { |
| 609 | } |
| 610 | |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 611 | static const struct of_device_id dsa_of_match_table[] = { |
| 612 | { .compatible = "marvell,dsa", }, |
| 613 | {} |
| 614 | }; |
| 615 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); |
| 616 | |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 617 | static struct platform_driver dsa_driver = { |
| 618 | .probe = dsa_probe, |
| 619 | .remove = dsa_remove, |
| 620 | .shutdown = dsa_shutdown, |
| 621 | .driver = { |
| 622 | .name = "dsa", |
| 623 | .owner = THIS_MODULE, |
Florian Fainelli | 5e95329b | 2013-03-22 10:50:50 +0000 | [diff] [blame] | 624 | .of_match_table = dsa_of_match_table, |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 625 | }, |
| 626 | }; |
| 627 | |
| 628 | static int __init dsa_init_module(void) |
| 629 | { |
Ben Hutchings | 7df899c | 2011-11-25 14:35:02 +0000 | [diff] [blame] | 630 | int rc; |
| 631 | |
| 632 | rc = platform_driver_register(&dsa_driver); |
| 633 | if (rc) |
| 634 | return rc; |
| 635 | |
| 636 | #ifdef CONFIG_NET_DSA_TAG_DSA |
| 637 | dev_add_pack(&dsa_packet_type); |
| 638 | #endif |
| 639 | #ifdef CONFIG_NET_DSA_TAG_EDSA |
| 640 | dev_add_pack(&edsa_packet_type); |
| 641 | #endif |
| 642 | #ifdef CONFIG_NET_DSA_TAG_TRAILER |
| 643 | dev_add_pack(&trailer_packet_type); |
| 644 | #endif |
| 645 | return 0; |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 646 | } |
| 647 | module_init(dsa_init_module); |
| 648 | |
| 649 | static void __exit dsa_cleanup_module(void) |
| 650 | { |
Ben Hutchings | 7df899c | 2011-11-25 14:35:02 +0000 | [diff] [blame] | 651 | #ifdef CONFIG_NET_DSA_TAG_TRAILER |
| 652 | dev_remove_pack(&trailer_packet_type); |
| 653 | #endif |
| 654 | #ifdef CONFIG_NET_DSA_TAG_EDSA |
| 655 | dev_remove_pack(&edsa_packet_type); |
| 656 | #endif |
| 657 | #ifdef CONFIG_NET_DSA_TAG_DSA |
| 658 | dev_remove_pack(&dsa_packet_type); |
| 659 | #endif |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 660 | platform_driver_unregister(&dsa_driver); |
| 661 | } |
| 662 | module_exit(dsa_cleanup_module); |
| 663 | |
Rusty Russell | 577d6a7 | 2011-01-24 14:32:52 -0600 | [diff] [blame] | 664 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 665 | MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips"); |
| 666 | MODULE_LICENSE("GPL"); |
| 667 | MODULE_ALIAS("platform:dsa"); |