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.
22 * Basic doc of driver's /proc interface:
23 * /proc/switch/<interface>/
24 * registers: read-only
26 * reset: write causes hardware reset
27 * enable_vlan: "0", "1"
30 * media: "AUTO", "100FD", "100HD", "10FD", "10HD"
32 * ports: same syntax as for nvram's vlan*ports (eg. "1 2 3 4 5*")
35 #include <linux/autoconf.h>
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <asm/uaccess.h>
39 #include <linux/proc_fs.h>
40 #include <linux/list.h>
42 #include "switch-core.h"
44 static int drv_num = 0;
45 static struct proc_dir_entry *switch_root;
46 switch_driver drivers;
49 struct list_head list;
50 struct proc_dir_entry *parent;
53 switch_config handler;
54 } switch_proc_handler;
57 struct proc_dir_entry *driver_dir, *port_dir, *vlan_dir;
58 struct proc_dir_entry **ports, **vlans;
59 switch_proc_handler data;
63 static ssize_t switch_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos);
64 static ssize_t switch_proc_write(struct file *file, const char *buf, size_t count, void *data);
66 static struct file_operations switch_proc_fops = {
67 .read = (ssize_t (*) (struct file *, char __user *, size_t, loff_t *))switch_proc_read,
68 .write = (ssize_t (*) (struct file *, const char __user *, size_t, loff_t *))switch_proc_write
71 static ssize_t switch_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos)
74 struct inode *inode = file->f_dentry->d_inode;
75 struct proc_dir_entry *dent = inode->u.generic_ip;
77 struct proc_dir_entry *dent = PDE(file->f_dentry->d_inode);
82 if ((page = kmalloc(SWITCH_MAX_BUFSZ, GFP_KERNEL)) == NULL)
85 if (dent->data != NULL) {
86 switch_proc_handler *handler = (switch_proc_handler *) dent->data;
87 if (handler->handler.read != NULL)
88 len += handler->handler.read(handler->driver, page + len, handler->nr);
93 len = min_t(int, len - *ppos, count);
94 if (copy_to_user(buf, (page + *ppos), len)) {
108 static ssize_t switch_proc_write(struct file *file, const char *buf, size_t count, void *data)
111 struct inode *inode = file->f_dentry->d_inode;
112 struct proc_dir_entry *dent = inode->u.generic_ip;
114 struct proc_dir_entry *dent = PDE(file->f_dentry->d_inode);
119 if ((page = kmalloc(count + 1, GFP_KERNEL)) == NULL)
122 if (copy_from_user(page, buf, count)) {
128 if (dent->data != NULL) {
129 switch_proc_handler *handler = (switch_proc_handler *) dent->data;
130 if (handler->handler.write != NULL) {
131 if ((ret = handler->handler.write(handler->driver, page, handler->nr)) >= 0)
140 static int handle_driver_name(void *driver, char *buf, int nr)
142 const char *name = ((switch_driver *) driver)->name;
143 return sprintf(buf, "%s\n", name);
146 static int handle_driver_version(void *driver, char *buf, int nr)
148 const char *version = ((switch_driver *) driver)->version;
149 strcpy(buf, version);
150 return sprintf(buf, "%s\n", version);
153 static void add_handler(switch_driver *driver, const switch_config *handler, struct proc_dir_entry *parent, int nr)
155 switch_priv *priv = (switch_priv *) driver->data;
156 struct proc_dir_entry *p;
159 switch_proc_handler *tmp;
160 tmp = (switch_proc_handler *) kmalloc(sizeof(switch_proc_handler), GFP_KERNEL);
161 INIT_LIST_HEAD(&tmp->list);
162 tmp->parent = parent;
164 tmp->driver = driver;
165 memcpy(&tmp->handler, handler, sizeof(switch_config));
166 list_add(&tmp->list, &priv->data.list);
169 if (handler->read != NULL) mode |= S_IRUSR;
170 if (handler->write != NULL) mode |= S_IWUSR;
172 if ((p = create_proc_entry(handler->name, mode, parent)) != NULL) {
173 p->data = (void *) tmp;
174 p->proc_fops = &switch_proc_fops;
178 static inline void add_handlers(switch_driver *driver, const switch_config *handlers, struct proc_dir_entry *parent, int nr)
182 for (i = 0; handlers[i].name != NULL; i++) {
183 add_handler(driver, &(handlers[i]), parent, nr);
187 static void remove_handlers(switch_priv *priv)
189 struct list_head *pos, *q;
190 switch_proc_handler *tmp;
192 list_for_each_safe(pos, q, &priv->data.list) {
193 tmp = list_entry(pos, switch_proc_handler, list);
195 remove_proc_entry(tmp->handler.name, tmp->parent);
201 static void do_unregister(switch_driver *driver)
205 switch_priv *priv = (switch_priv *) driver->data;
207 remove_handlers(priv);
209 for(i = 0; priv->ports[i] != NULL; i++) {
210 sprintf(buf, "%d", i);
211 remove_proc_entry(buf, priv->port_dir);
214 remove_proc_entry("port", priv->driver_dir);
216 for(i = 0; priv->vlans[i] != NULL; i++) {
217 sprintf(buf, "%d", i);
218 remove_proc_entry(buf, priv->vlan_dir);
221 remove_proc_entry("vlan", priv->driver_dir);
223 remove_proc_entry(driver->interface, switch_root);
225 if (priv->nr == (drv_num - 1))
231 switch_config global_driver_handlers[] = {
232 {"driver", handle_driver_name, NULL},
233 {"version", handle_driver_version, NULL},
237 static int do_register(switch_driver *driver)
243 if ((priv = kmalloc(sizeof(switch_priv), GFP_KERNEL)) == NULL)
245 driver->data = (void *) priv;
247 INIT_LIST_HEAD(&priv->data.list);
249 priv->nr = drv_num++;
250 priv->driver_dir = proc_mkdir(driver->interface, switch_root);
251 if (driver->driver_handlers != NULL) {
252 add_handlers(driver, driver->driver_handlers, priv->driver_dir, 0);
253 add_handlers(driver, global_driver_handlers, priv->driver_dir, 0);
256 priv->port_dir = proc_mkdir("port", priv->driver_dir);
257 priv->ports = kmalloc((driver->ports + 1) * sizeof(struct proc_dir_entry *), GFP_KERNEL);
258 for (i = 0; i < driver->ports; i++) {
259 sprintf(buf, "%d", i);
260 priv->ports[i] = proc_mkdir(buf, priv->port_dir);
261 if (driver->port_handlers != NULL)
262 add_handlers(driver, driver->port_handlers, priv->ports[i], i);
264 priv->ports[i] = NULL;
266 priv->vlan_dir = proc_mkdir("vlan", priv->driver_dir);
267 priv->vlans = kmalloc((driver->vlans + 1) * sizeof(struct proc_dir_entry *), GFP_KERNEL);
268 for (i = 0; i < driver->vlans; i++) {
269 sprintf(buf, "%d", i);
270 priv->vlans[i] = proc_mkdir(buf, priv->vlan_dir);
271 if (driver->vlan_handlers != NULL)
272 add_handlers(driver, driver->vlan_handlers, priv->vlans[i], i);
274 priv->vlans[i] = NULL;
280 static inline int isspace(char c) {
292 #define toupper(c) (islower(c) ? ((c) ^ 0x20) : (c))
293 #define islower(c) (((unsigned char)((c) - 'a')) < 26)
295 int switch_parse_media(char *buf)
299 *buf = toupper(*buf);
303 if (strncmp(str, "AUTO", 4) == 0)
304 return SWITCH_MEDIA_AUTO;
305 else if (strncmp(str, "100FD", 5) == 0)
306 return SWITCH_MEDIA_100 | SWITCH_MEDIA_FD;
307 else if (strncmp(str, "100HD", 5) == 0)
308 return SWITCH_MEDIA_100;
309 else if (strncmp(str, "10FD", 4) == 0)
310 return SWITCH_MEDIA_FD;
311 else if (strncmp(str, "10HD", 4) == 0)
316 int switch_print_media(char *buf, int media)
320 if (media & SWITCH_MEDIA_AUTO)
321 len = sprintf(buf, "Auto");
322 else if (media == (SWITCH_MEDIA_100 | SWITCH_MEDIA_FD))
323 len = sprintf(buf, "100FD");
324 else if (media == SWITCH_MEDIA_100)
325 len = sprintf(buf, "100HD");
326 else if (media == SWITCH_MEDIA_FD)
327 len = sprintf(buf, "10FD");
329 len = sprintf(buf, "10HD");
331 len = sprintf(buf, "Invalid");
336 switch_vlan_config *switch_parse_vlan(switch_driver *driver, char *buf)
338 switch_vlan_config *c;
341 c = kmalloc(sizeof(switch_vlan_config), GFP_KERNEL);
342 memset(c, 0, sizeof(switch_vlan_config));
344 while (isspace(*buf)) buf++;
346 while (*buf >= '0' && *buf <= '9') {
350 u = ((j == driver->cpuport) ? 0 : 1);
352 s = !(*buf >= '0' && *buf <= '9');
355 while (s && !isspace(*buf) && (*buf != 0)) {
371 c->untag |= (1 << j);
378 while (isspace(*buf)) buf++;
380 if (*buf != 0) return NULL;
382 c->port &= (1 << driver->ports) - 1;
383 c->untag &= (1 << driver->ports) - 1;
384 c->pvid &= (1 << driver->ports) - 1;
390 int switch_register_driver(switch_driver *driver)
392 struct list_head *pos;
396 list_for_each(pos, &drivers.list) {
397 if (strcmp(list_entry(pos, switch_driver, list)->name, driver->name) == 0) {
398 printk("Switch driver '%s' already exists in the kernel\n", driver->name);
401 if (strcmp(list_entry(pos, switch_driver, list)->interface, driver->interface) == 0) {
402 printk("There is already a switch registered on the device '%s'\n", driver->interface);
407 new = kmalloc(sizeof(switch_driver), GFP_KERNEL);
408 memcpy(new, driver, sizeof(switch_driver));
409 new->name = strdup(driver->name);
410 new->interface = strdup(driver->interface);
412 if ((ret = do_register(new)) < 0) {
417 INIT_LIST_HEAD(&new->list);
418 list_add(&new->list, &drivers.list);
423 void switch_unregister_driver(char *name) {
424 struct list_head *pos, *q;
427 list_for_each_safe(pos, q, &drivers.list) {
428 tmp = list_entry(pos, switch_driver, list);
429 if (strcmp(tmp->name, name) == 0) {
440 static int __init switch_init(void)
442 if ((switch_root = proc_mkdir("switch", NULL)) == NULL) {
443 printk("%s: proc_mkdir failed.\n", __FILE__);
447 INIT_LIST_HEAD(&drivers.list);
452 static void __exit switch_exit(void)
454 remove_proc_entry("switch", NULL);
457 MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
458 MODULE_LICENSE("GPL");
460 EXPORT_SYMBOL(switch_register_driver);
461 EXPORT_SYMBOL(switch_unregister_driver);
462 EXPORT_SYMBOL(switch_parse_vlan);
463 EXPORT_SYMBOL(switch_parse_media);
464 EXPORT_SYMBOL(switch_print_media);
466 module_init(switch_init);
467 module_exit(switch_exit);