4 * Copyright (C) 2005 Felix Fietkau <openwrt@nbd.name>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 * Basic doc of driver's /proc interface:
22 * /proc/switch/<interface>/
23 * registers: read-only
25 * reset: write causes hardware reset
26 * enable_vlan: "0", "1"
29 * media: "AUTO", "1000FD", "1000HD", "100FD", "100HD", "10FD", "10HD"
31 * ports: same syntax as for nvram's vlan*ports (eg. "1 2 3 4 5*")
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <asm/uaccess.h>
37 #include <linux/proc_fs.h>
38 #include <linux/list.h>
40 #include "switch-core.h"
42 static int drv_num = 0;
43 static struct proc_dir_entry *switch_root;
44 switch_driver drivers;
47 struct list_head list;
48 struct proc_dir_entry *parent;
51 switch_config handler;
52 } switch_proc_handler;
55 struct proc_dir_entry *driver_dir, *port_dir, *vlan_dir;
56 struct proc_dir_entry **ports, **vlans;
57 switch_proc_handler data;
61 static ssize_t switch_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos);
62 static ssize_t switch_proc_write(struct file *file, const char *buf, size_t count, void *data);
64 static struct file_operations switch_proc_fops = {
65 .read = (ssize_t (*) (struct file *, char __user *, size_t, loff_t *))switch_proc_read,
66 .write = (ssize_t (*) (struct file *, const char __user *, size_t, loff_t *))switch_proc_write
69 static ssize_t switch_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos)
71 struct proc_dir_entry *dent = PDE(file->f_dentry->d_inode);
75 if ((page = kmalloc(SWITCH_MAX_BUFSZ, GFP_KERNEL)) == NULL)
78 if (dent->data != NULL) {
79 switch_proc_handler *handler = (switch_proc_handler *) dent->data;
80 if (handler->handler.read != NULL)
81 len += handler->handler.read(handler->driver, page + len, handler->nr);
86 len = min_t(int, len - *ppos, count);
87 if (copy_to_user(buf, (page + *ppos), len)) {
101 static ssize_t switch_proc_write(struct file *file, const char *buf, size_t count, void *data)
103 struct proc_dir_entry *dent = PDE(file->f_dentry->d_inode);
107 if ((page = kmalloc(count + 1, GFP_KERNEL)) == NULL)
110 if (copy_from_user(page, buf, count)) {
116 if (dent->data != NULL) {
117 switch_proc_handler *handler = (switch_proc_handler *) dent->data;
118 if (handler->handler.write != NULL) {
119 if ((ret = handler->handler.write(handler->driver, page, handler->nr)) >= 0)
128 static int handle_driver_name(void *driver, char *buf, int nr)
130 const char *name = ((switch_driver *) driver)->name;
131 return sprintf(buf, "%s\n", name);
134 static int handle_driver_version(void *driver, char *buf, int nr)
136 const char *version = ((switch_driver *) driver)->version;
137 strcpy(buf, version);
138 return sprintf(buf, "%s\n", version);
141 static void add_handler(switch_driver *driver, const switch_config *handler, struct proc_dir_entry *parent, int nr)
143 switch_priv *priv = (switch_priv *) driver->data;
144 struct proc_dir_entry *p;
147 switch_proc_handler *tmp;
148 tmp = (switch_proc_handler *) kmalloc(sizeof(switch_proc_handler), GFP_KERNEL);
151 INIT_LIST_HEAD(&tmp->list);
152 tmp->parent = parent;
154 tmp->driver = driver;
155 memcpy(&tmp->handler, handler, sizeof(switch_config));
156 list_add(&tmp->list, &priv->data.list);
159 if (handler->read != NULL) mode |= S_IRUSR;
160 if (handler->write != NULL) mode |= S_IWUSR;
162 if ((p = create_proc_entry(handler->name, mode, parent)) != NULL) {
163 p->data = (void *) tmp;
164 p->proc_fops = &switch_proc_fops;
168 static inline void add_handlers(switch_driver *driver, const switch_config *handlers, struct proc_dir_entry *parent, int nr)
172 for (i = 0; handlers[i].name != NULL; i++) {
173 add_handler(driver, &(handlers[i]), parent, nr);
177 static void remove_handlers(switch_priv *priv)
179 struct list_head *pos, *q;
180 switch_proc_handler *tmp;
182 list_for_each_safe(pos, q, &priv->data.list) {
183 tmp = list_entry(pos, switch_proc_handler, list);
185 remove_proc_entry(tmp->handler.name, tmp->parent);
191 static void do_unregister(switch_driver *driver)
195 switch_priv *priv = (switch_priv *) driver->data;
197 remove_handlers(priv);
199 for(i = 0; priv->ports[i] != NULL; i++) {
200 sprintf(buf, "%d", i);
201 remove_proc_entry(buf, priv->port_dir);
204 remove_proc_entry("port", priv->driver_dir);
206 for(i = 0; priv->vlans[i] != NULL; i++) {
207 sprintf(buf, "%d", i);
208 remove_proc_entry(buf, priv->vlan_dir);
211 remove_proc_entry("vlan", priv->driver_dir);
213 remove_proc_entry(driver->interface, switch_root);
215 if (priv->nr == (drv_num - 1))
221 switch_config global_driver_handlers[] = {
222 {"driver", handle_driver_name, NULL},
223 {"version", handle_driver_version, NULL},
227 static int do_register(switch_driver *driver)
233 priv = kmalloc(sizeof(switch_priv), GFP_KERNEL);
236 driver->data = (void *) priv;
238 priv->ports = kmalloc((driver->ports + 1) * sizeof(struct proc_dir_entry *),
244 priv->vlans = kmalloc((driver->vlans + 1) * sizeof(struct proc_dir_entry *),
252 INIT_LIST_HEAD(&priv->data.list);
254 priv->nr = drv_num++;
255 priv->driver_dir = proc_mkdir(driver->interface, switch_root);
256 if (driver->driver_handlers != NULL) {
257 add_handlers(driver, driver->driver_handlers, priv->driver_dir, 0);
258 add_handlers(driver, global_driver_handlers, priv->driver_dir, 0);
261 priv->port_dir = proc_mkdir("port", priv->driver_dir);
262 for (i = 0; i < driver->ports; i++) {
263 sprintf(buf, "%d", i);
264 priv->ports[i] = proc_mkdir(buf, priv->port_dir);
265 if (driver->port_handlers != NULL)
266 add_handlers(driver, driver->port_handlers, priv->ports[i], i);
268 priv->ports[i] = NULL;
270 priv->vlan_dir = proc_mkdir("vlan", priv->driver_dir);
271 for (i = 0; i < driver->vlans; i++) {
272 sprintf(buf, "%d", i);
273 priv->vlans[i] = proc_mkdir(buf, priv->vlan_dir);
274 if (driver->vlan_handlers != NULL)
275 add_handlers(driver, driver->vlan_handlers, priv->vlans[i], i);
277 priv->vlans[i] = NULL;
283 static inline int isspace(char c) {
295 #define toupper(c) (islower(c) ? ((c) ^ 0x20) : (c))
296 #define islower(c) (((unsigned char)((c) - 'a')) < 26)
298 int switch_parse_media(char *buf)
302 *buf = toupper(*buf);
306 if (strncmp(str, "AUTO", 4) == 0)
307 return SWITCH_MEDIA_AUTO;
308 else if (strncmp(str, "1000FD", 6) == 0)
309 return SWITCH_MEDIA_1000 | SWITCH_MEDIA_FD;
310 else if (strncmp(str, "1000HD", 6) == 0)
311 return SWITCH_MEDIA_1000;
312 else if (strncmp(str, "100FD", 5) == 0)
313 return SWITCH_MEDIA_100 | SWITCH_MEDIA_FD;
314 else if (strncmp(str, "100HD", 5) == 0)
315 return SWITCH_MEDIA_100;
316 else if (strncmp(str, "10FD", 4) == 0)
317 return SWITCH_MEDIA_FD;
318 else if (strncmp(str, "10HD", 4) == 0)
323 int switch_print_media(char *buf, int media)
327 if (media & SWITCH_MEDIA_AUTO)
328 len = sprintf(buf, "Auto");
329 else if (media == (SWITCH_MEDIA_1000 | SWITCH_MEDIA_FD))
330 len = sprintf(buf, "1000FD");
331 else if (media == SWITCH_MEDIA_1000)
332 len = sprintf(buf, "1000HD");
333 else if (media == (SWITCH_MEDIA_100 | SWITCH_MEDIA_FD))
334 len = sprintf(buf, "100FD");
335 else if (media == SWITCH_MEDIA_100)
336 len = sprintf(buf, "100HD");
337 else if (media == SWITCH_MEDIA_FD)
338 len = sprintf(buf, "10FD");
340 len = sprintf(buf, "10HD");
342 len = sprintf(buf, "Invalid");
347 switch_vlan_config *switch_parse_vlan(switch_driver *driver, char *buf)
349 switch_vlan_config *c;
352 c = kzalloc(sizeof(switch_vlan_config), GFP_KERNEL);
356 while (isspace(*buf)) buf++;
358 while (*buf >= '0' && *buf <= '9') {
362 u = ((j == driver->cpuport) ? 0 : 1);
364 s = !(*buf >= '0' && *buf <= '9');
367 while (s && !isspace(*buf) && (*buf != 0)) {
383 c->untag |= (1 << j);
390 while (isspace(*buf)) buf++;
397 c->port &= (1 << driver->ports) - 1;
398 c->untag &= (1 << driver->ports) - 1;
399 c->pvid &= (1 << driver->ports) - 1;
405 int switch_device_registered (char* device) {
406 struct list_head *pos;
408 list_for_each(pos, &drivers.list) {
409 if (strcmp(list_entry(pos, switch_driver, list)->interface, device) == 0) {
410 printk("There is already a switch registered on the device '%s'\n", device);
419 int switch_register_driver(switch_driver *driver)
421 struct list_head *pos;
425 list_for_each(pos, &drivers.list) {
426 if (strcmp(list_entry(pos, switch_driver, list)->name, driver->name) == 0) {
427 printk("Switch driver '%s' already exists in the kernel\n", driver->name);
430 if (strcmp(list_entry(pos, switch_driver, list)->interface, driver->interface) == 0) {
431 printk("There is already a switch registered on the device '%s'\n", driver->interface);
436 new = kmalloc(sizeof(switch_driver), GFP_KERNEL);
439 memcpy(new, driver, sizeof(switch_driver));
440 new->name = strdup(driver->name);
441 new->interface = strdup(driver->interface);
443 if ((ret = do_register(new)) < 0) {
448 INIT_LIST_HEAD(&new->list);
449 list_add(&new->list, &drivers.list);
454 void switch_unregister_driver(char *name) {
455 struct list_head *pos, *q;
458 list_for_each_safe(pos, q, &drivers.list) {
459 tmp = list_entry(pos, switch_driver, list);
460 if (strcmp(tmp->name, name) == 0) {
471 static int __init switch_init(void)
473 if ((switch_root = proc_mkdir("switch", NULL)) == NULL) {
474 printk("%s: proc_mkdir failed.\n", __FILE__);
478 INIT_LIST_HEAD(&drivers.list);
483 static void __exit switch_exit(void)
485 remove_proc_entry("switch", NULL);
488 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
489 MODULE_LICENSE("GPL");
491 EXPORT_SYMBOL(switch_device_registered);
492 EXPORT_SYMBOL(switch_register_driver);
493 EXPORT_SYMBOL(switch_unregister_driver);
494 EXPORT_SYMBOL(switch_parse_vlan);
495 EXPORT_SYMBOL(switch_parse_media);
496 EXPORT_SYMBOL(switch_print_media);
498 module_init(switch_init);
499 module_exit(switch_exit);