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-rw-r--r--package/switch/src/switch-core.c466
1 files changed, 466 insertions, 0 deletions
diff --git a/package/switch/src/switch-core.c b/package/switch/src/switch-core.c
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+++ b/package/switch/src/switch-core.c
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+/*
+ * switch-core.c
+ *
+ * Copyright (C) 2005 Felix Fietkau <openwrt@nbd.name>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * $Id: $
+ *
+ * Basic doc of driver's /proc interface:
+ * /proc/switch/<interface>/
+ * registers: read-only
+ * counters: read-only
+ * reset: write causes hardware reset
+ * enable_vlan: "0", "1"
+ * port/<port-number>/
+ * enabled: "0", "1"
+ * media: "AUTO", "100FD", "100HD", "10FD", "10HD"
+ * vlan/<port-number>/
+ * ports: same syntax as for nvram's vlan*ports (eg. "1 2 3 4 5*")
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <linux/proc_fs.h>
+#include <linux/list.h>
+
+#include "switch-core.h"
+
+static int drv_num = 0;
+static struct proc_dir_entry *switch_root;
+switch_driver drivers;
+
+typedef struct {
+ struct list_head list;
+ struct proc_dir_entry *parent;
+ int nr;
+ void *driver;
+ switch_config handler;
+} switch_proc_handler;
+
+typedef struct {
+ struct proc_dir_entry *driver_dir, *port_dir, *vlan_dir;
+ struct proc_dir_entry **ports, **vlans;
+ switch_proc_handler data;
+ int nr;
+} switch_priv;
+
+static ssize_t switch_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos);
+static ssize_t switch_proc_write(struct file *file, const char *buf, size_t count, void *data);
+
+static struct file_operations switch_proc_fops = {
+ .read = (ssize_t (*) (struct file *, char __user *, size_t, loff_t *))switch_proc_read,
+ .write = (ssize_t (*) (struct file *, const char __user *, size_t, loff_t *))switch_proc_write
+};
+
+static ssize_t switch_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos)
+{
+#ifdef LINUX_2_4
+ struct inode *inode = file->f_dentry->d_inode;
+ struct proc_dir_entry *dent = inode->u.generic_ip;
+#else
+ struct proc_dir_entry *dent = PDE(file->f_dentry->d_inode);
+#endif
+ char *page;
+ int len = 0;
+
+ if ((page = kmalloc(SWITCH_MAX_BUFSZ, GFP_KERNEL)) == NULL)
+ return -ENOBUFS;
+
+ if (dent->data != NULL) {
+ switch_proc_handler *handler = (switch_proc_handler *) dent->data;
+ if (handler->handler.read != NULL)
+ len += handler->handler.read(handler->driver, page + len, handler->nr);
+ }
+ len += 1;
+
+ if (*ppos < len) {
+ len = min_t(int, len - *ppos, count);
+ if (copy_to_user(buf, (page + *ppos), len)) {
+ kfree(page);
+ return -EFAULT;
+ }
+ *ppos += len;
+ } else {
+ len = 0;
+ }
+
+ return len;
+}
+
+
+static ssize_t switch_proc_write(struct file *file, const char *buf, size_t count, void *data)
+{
+#ifdef LINUX_2_4
+ struct inode *inode = file->f_dentry->d_inode;
+ struct proc_dir_entry *dent = inode->u.generic_ip;
+#else
+ struct proc_dir_entry *dent = PDE(file->f_dentry->d_inode);
+#endif
+ char *page;
+ int ret = -EINVAL;
+
+ if ((page = kmalloc(count + 1, GFP_KERNEL)) == NULL)
+ return -ENOBUFS;
+
+ if (copy_from_user(page, buf, count)) {
+ kfree(page);
+ return -EINVAL;
+ }
+ page[count] = 0;
+
+ if (dent->data != NULL) {
+ switch_proc_handler *handler = (switch_proc_handler *) dent->data;
+ if (handler->handler.write != NULL) {
+ if ((ret = handler->handler.write(handler->driver, page, handler->nr)) >= 0)
+ ret = count;
+ }
+ }
+
+ kfree(page);
+ return ret;
+}
+
+static int handle_driver_name(void *driver, char *buf, int nr)
+{
+ char *name = ((switch_driver *) driver)->name;
+ return sprintf(buf, "%s\n", name);
+}
+
+static int handle_driver_version(void *driver, char *buf, int nr)
+{
+ char *version = ((switch_driver *) driver)->version;
+ strcpy(buf, version);
+ return sprintf(buf, "%s\n", version);
+}
+
+static void add_handler(switch_driver *driver, switch_config *handler, struct proc_dir_entry *parent, int nr)
+{
+ switch_priv *priv = (switch_priv *) driver->data;
+ struct proc_dir_entry *p;
+ int mode;
+
+ switch_proc_handler *tmp;
+ tmp = (switch_proc_handler *) kmalloc(sizeof(switch_proc_handler), GFP_KERNEL);
+ INIT_LIST_HEAD(&tmp->list);
+ tmp->parent = parent;
+ tmp->nr = nr;
+ tmp->driver = driver;
+ memcpy(&tmp->handler, handler, sizeof(switch_config));
+ list_add(&tmp->list, &priv->data.list);
+
+ mode = 0;
+ if (handler->read != NULL) mode |= S_IRUSR;
+ if (handler->write != NULL) mode |= S_IWUSR;
+
+ if ((p = create_proc_entry(handler->name, mode, parent)) != NULL) {
+ p->data = (void *) tmp;
+ p->proc_fops = &switch_proc_fops;
+ }
+}
+
+static inline void add_handlers(switch_driver *driver, switch_config *handlers, struct proc_dir_entry *parent, int nr)
+{
+ int i;
+
+ for (i = 0; handlers[i].name != NULL; i++) {
+ add_handler(driver, &(handlers[i]), parent, nr);
+ }
+}
+
+static void remove_handlers(switch_priv *priv)
+{
+ struct list_head *pos, *q;
+ switch_proc_handler *tmp;
+
+ list_for_each_safe(pos, q, &priv->data.list) {
+ tmp = list_entry(pos, switch_proc_handler, list);
+ list_del(pos);
+ remove_proc_entry(tmp->handler.name, tmp->parent);
+ kfree(tmp);
+ }
+}
+
+
+static void do_unregister(switch_driver *driver)
+{
+ char buf[4];
+ int i;
+ switch_priv *priv = (switch_priv *) driver->data;
+
+ remove_handlers(priv);
+
+ for(i = 0; priv->ports[i] != NULL; i++) {
+ sprintf(buf, "%d", i);
+ remove_proc_entry(buf, priv->port_dir);
+ }
+ kfree(priv->ports);
+ remove_proc_entry("port", priv->driver_dir);
+
+ for(i = 0; priv->vlans[i] != NULL; i++) {
+ sprintf(buf, "%d", i);
+ remove_proc_entry(buf, priv->vlan_dir);
+ }
+ kfree(priv->vlans);
+ remove_proc_entry("vlan", priv->driver_dir);
+
+ remove_proc_entry(driver->interface, switch_root);
+
+ if (priv->nr == (drv_num - 1))
+ drv_num--;
+
+ kfree(priv);
+}
+
+switch_config global_driver_handlers[] = {
+ {"driver", handle_driver_name, NULL},
+ {"version", handle_driver_version, NULL},
+ {NULL, NULL, NULL}
+};
+
+static int do_register(switch_driver *driver)
+{
+ switch_priv *priv;
+ int i;
+ char buf[4];
+
+ if ((priv = kmalloc(sizeof(switch_priv), GFP_KERNEL)) == NULL)
+ return -ENOBUFS;
+ driver->data = (void *) priv;
+
+ INIT_LIST_HEAD(&priv->data.list);
+
+ priv->nr = drv_num++;
+ priv->driver_dir = proc_mkdir(driver->interface, switch_root);
+ if (driver->driver_handlers != NULL) {
+ add_handlers(driver, driver->driver_handlers, priv->driver_dir, 0);
+ add_handlers(driver, global_driver_handlers, priv->driver_dir, 0);
+ }
+
+ priv->port_dir = proc_mkdir("port", priv->driver_dir);
+ priv->ports = kmalloc((driver->ports + 1) * sizeof(struct proc_dir_entry *), GFP_KERNEL);
+ for (i = 0; i < driver->ports; i++) {
+ sprintf(buf, "%d", i);
+ priv->ports[i] = proc_mkdir(buf, priv->port_dir);
+ if (driver->port_handlers != NULL)
+ add_handlers(driver, driver->port_handlers, priv->ports[i], i);
+ }
+ priv->ports[i] = NULL;
+
+ priv->vlan_dir = proc_mkdir("vlan", priv->driver_dir);
+ priv->vlans = kmalloc((driver->vlans + 1) * sizeof(struct proc_dir_entry *), GFP_KERNEL);
+ for (i = 0; i < driver->vlans; i++) {
+ sprintf(buf, "%d", i);
+ priv->vlans[i] = proc_mkdir(buf, priv->vlan_dir);
+ if (driver->vlan_handlers != NULL)
+ add_handlers(driver, driver->vlan_handlers, priv->vlans[i], i);
+ }
+ priv->vlans[i] = NULL;
+
+
+ return 0;
+}
+
+static inline int isspace(char c) {
+ switch(c) {
+ case ' ':
+ case 0x09:
+ case 0x0a:
+ case 0x0d:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+#define toupper(c) (islower(c) ? ((c) ^ 0x20) : (c))
+#define islower(c) (((unsigned char)((c) - 'a')) < 26)
+
+int switch_parse_media(char *buf)
+{
+ char *str = buf;
+ while (*buf != 0) {
+ *buf = toupper(*buf);
+ buf++;
+ }
+
+ if (strncmp(str, "AUTO", 4) == 0)
+ return SWITCH_MEDIA_AUTO;
+ else if (strncmp(str, "100FD", 5) == 0)
+ return SWITCH_MEDIA_100 | SWITCH_MEDIA_FD;
+ else if (strncmp(str, "100HD", 5) == 0)
+ return SWITCH_MEDIA_100;
+ else if (strncmp(str, "10FD", 4) == 0)
+ return SWITCH_MEDIA_FD;
+ else if (strncmp(str, "10HD", 4) == 0)
+ return 0;
+ else return -1;
+}
+
+int switch_print_media(char *buf, int media)
+{
+ int len = 0;
+
+ if (media & SWITCH_MEDIA_AUTO)
+ len = sprintf(buf, "Auto");
+ else if (media == (SWITCH_MEDIA_100 | SWITCH_MEDIA_FD))
+ len = sprintf(buf, "100FD");
+ else if (media == SWITCH_MEDIA_100)
+ len = sprintf(buf, "100HD");
+ else if (media == SWITCH_MEDIA_FD)
+ len = sprintf(buf, "10FD");
+ else if (media == 0)
+ len = sprintf(buf, "10HD");
+ else
+ len = sprintf(buf, "Invalid");
+
+ return len;
+}
+
+switch_vlan_config *switch_parse_vlan(switch_driver *driver, char *buf)
+{
+ switch_vlan_config *c;
+ int j, u, p, s;
+
+ c = kmalloc(sizeof(switch_vlan_config), GFP_KERNEL);
+ memset(c, 0, sizeof(switch_vlan_config));
+
+ while (isspace(*buf)) buf++;
+ j = 0;
+ while (*buf >= '0' && *buf <= '9') {
+ j *= 10;
+ j += *buf++ - '0';
+
+ u = ((j == driver->cpuport) ? 0 : 1);
+ p = 0;
+ s = !(*buf >= '0' && *buf <= '9');
+
+ if (s) {
+ while (s && !isspace(*buf) && (*buf != 0)) {
+ switch(*buf) {
+ case 'u':
+ u = 1;
+ break;
+ case 't':
+ u = 0;
+ break;
+ case '*':
+ p = 1;
+ break;
+ }
+ buf++;
+ }
+ c->port |= (1 << j);
+ if (u)
+ c->untag |= (1 << j);
+ if (p)
+ c->pvid |= (1 << j);
+
+ j = 0;
+ }
+
+ while (isspace(*buf)) buf++;
+ }
+ if (*buf != 0) return NULL;
+
+ c->port &= (1 << driver->ports) - 1;
+ c->untag &= (1 << driver->ports) - 1;
+ c->pvid &= (1 << driver->ports) - 1;
+
+ return c;
+}
+
+
+int switch_register_driver(switch_driver *driver)
+{
+ struct list_head *pos;
+ switch_driver *new;
+ int ret;
+
+ list_for_each(pos, &drivers.list) {
+ if (strcmp(list_entry(pos, switch_driver, list)->name, driver->name) == 0) {
+ printk("Switch driver '%s' already exists in the kernel\n", driver->name);
+ return -EINVAL;
+ }
+ if (strcmp(list_entry(pos, switch_driver, list)->interface, driver->interface) == 0) {
+ printk("There is already a switch registered on the device '%s'\n", driver->interface);
+ return -EINVAL;
+ }
+ }
+
+ new = kmalloc(sizeof(switch_driver), GFP_KERNEL);
+ memcpy(new, driver, sizeof(switch_driver));
+ new->name = strdup(driver->name);
+ new->interface = strdup(driver->interface);
+
+ if ((ret = do_register(new)) < 0) {
+ kfree(new->name);
+ kfree(new);
+ return ret;
+ }
+ INIT_LIST_HEAD(&new->list);
+ list_add(&new->list, &drivers.list);
+
+ return 0;
+}
+
+void switch_unregister_driver(char *name) {
+ struct list_head *pos, *q;
+ switch_driver *tmp;
+
+ list_for_each_safe(pos, q, &drivers.list) {
+ tmp = list_entry(pos, switch_driver, list);
+ if (strcmp(tmp->name, name) == 0) {
+ do_unregister(tmp);
+ list_del(pos);
+ kfree(tmp->name);
+ kfree(tmp);
+
+ return;
+ }
+ }
+}
+
+static int __init switch_init(void)
+{
+ if ((switch_root = proc_mkdir("switch", NULL)) == NULL) {
+ printk("%s: proc_mkdir failed.\n", __FILE__);
+ return -ENODEV;
+ }
+
+ INIT_LIST_HEAD(&drivers.list);
+
+ return 0;
+}
+
+static void __exit switch_exit(void)
+{
+ remove_proc_entry("switch", NULL);
+}
+
+MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(switch_register_driver);
+EXPORT_SYMBOL(switch_unregister_driver);
+EXPORT_SYMBOL(switch_parse_vlan);
+EXPORT_SYMBOL(switch_parse_media);
+EXPORT_SYMBOL(switch_print_media);
+
+module_init(switch_init);
+module_exit(switch_exit);
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