diff options
Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/mach-common/switch-core.c')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/mach-common/switch-core.c | 737 |
1 files changed, 0 insertions, 737 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/mach-common/switch-core.c b/target/linux/ubicom32/files/arch/ubicom32/mach-common/switch-core.c deleted file mode 100644 index 855aa068d2..0000000000 --- a/target/linux/ubicom32/files/arch/ubicom32/mach-common/switch-core.c +++ /dev/null @@ -1,737 +0,0 @@ -/* - * arch/ubicom32/mach-common/switch-core.c - * Ubicom32 architecture switch and /proc/switch/... implementation. - * - * (C) Copyright 2009, Ubicom, Inc. - * Copyright (C) 2005 Felix Fietkau <openwrt@nbd.name> - * - * This file is part of the Ubicom32 Linux Kernel Port. - * - * The Ubicom32 Linux Kernel Port 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. - * - * The Ubicom32 Linux Kernel Port 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 the Ubicom32 Linux Kernel Port. If not, - * see <http://www.gnu.org/licenses/>. - * - * Ubicom32 implementation derived from (with many thanks): - * arch/m68knommu - * arch/blackfin - * arch/parisc - * - * Basic doc of driver's /proc interface: - * /proc/switch/<interface>/ - * registers: read-only - * counters: read-only - * reset: write causes hardware reset - * enable: "0", "1" - * enable_vlan: "0", "1" - * port/<port-number>/ - * enabled: "0", "1" - * link state: read-only - * media: "AUTO", "1000FD", "100FD", "100HD", "10FD", "10HD" - * vlan/<port-number>/ - * ports: same syntax as for nvram's vlan*ports (eg. "1 2 3 4 5*") - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/uaccess.h> -#include <linux/ctype.h> -#include <linux/proc_fs.h> -#include <linux/list.h> -#include <linux/rwsem.h> -#include <linux/device.h> - -#include "switch-core.h" - -/* - * Pointer to the root of our filesystem - */ -static struct proc_dir_entry *switch_root; - -/* - * Lock used to manage access to the switch list - */ -DECLARE_RWSEM(switch_list_lock); -EXPORT_SYMBOL_GPL(switch_list_lock); - -/* - * List of switches we are managing - */ -LIST_HEAD(switch_list); -EXPORT_SYMBOL_GPL(switch_list); - -/* - * List of handlers we have - */ -LIST_HEAD(switch_handler_list); -EXPORT_SYMBOL_GPL(switch_handler_list); - -/* - * Keep track of all the handlers we added - */ -struct switch_handler_entry { - struct list_head node; - struct proc_dir_entry *parent; - struct switch_device *dev; - const struct switch_handler *handler; - int inst; -}; - -/* - * Keep track of all VLAN dirs we created - */ -struct switch_vlan_entry { - struct list_head node; - struct proc_dir_entry *pde; - int vlan_id; - const struct switch_handler *handlers; -}; - -/* - * switch_parse_vlan_ports - * Parse the vlan properties written to <driver>/vlan/<vlan_id>/ports - */ -void switch_parse_vlan_ports(struct switch_device *switch_dev, - char *buf, u32_t *untag, - u32_t *ports, u32_t *def) -{ - u32_t tag = 0; - *untag = 0; - *ports = 0; - *def = 0; - - - /* - * Skip any leading spaces - */ - while (isspace(*buf)) { - buf++; - } - - /* - * Parse out the string - */ - while (*buf) { - u32_t port = simple_strtoul(buf, &buf, 10); - u32_t mask = (1 << port); - - /* - * Parse out any flags - */ - while (*buf && !isspace(*buf)) { - switch (*buf++) { - case 't': - tag |= mask; - break; - case '*': - *def |= mask; - break; - } - } - *ports |= mask; - - /* - * Skip any spaces - */ - while (isspace(*buf)) { - buf++; - } - } - - *untag = ~tag & *ports; -} - -/* - * switch_proc_read - * Handle reads from the procfs, dispatches the driver specific handler - */ -static ssize_t switch_proc_read(struct file *file, char *buf, size_t count, - loff_t *ppos) -{ - struct proc_dir_entry *pde = PDE(file->f_dentry->d_inode); - char *page; - int len = 0; - - page = kmalloc(SWITCH_MAX_BUFSZ, GFP_KERNEL); - if (!page) { - return -ENOBUFS; - } - - if (pde->data != NULL) { - struct switch_handler_entry *she = - (struct switch_handler_entry *)pde->data; - if (she->handler->read) { - len += she->handler->read(she->dev, page + len, - she->inst); - } - } - 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; - } - - kfree(page); - - return len; -} - -/* - * switch_proc_write - * Handle writes from the procfs, dispatches the driver specific handler - */ -static ssize_t switch_proc_write(struct file *file, const char *buf, - size_t count, loff_t *data) -{ - struct proc_dir_entry *pde = PDE(file->f_dentry->d_inode); - char *page; - int ret = -EINVAL; - - page = kmalloc(count + 1, GFP_KERNEL); - if (page == NULL) - return -ENOBUFS; - - if (copy_from_user(page, buf, count)) { - kfree(page); - return -EINVAL; - } - page[count] = 0; - - if (pde->data != NULL) { - struct switch_handler_entry *she = - (struct switch_handler_entry *)pde->data; - if (she->handler->write) { - ret = she->handler->write(she->dev, page, she->inst); - if (ret >= 0) { - ret = count; - } - } - } - - kfree(page); - return ret; -} - -/* - * File operations for the proc_fs, we must cast here since proc_fs' definitions - * differ from file_operations definitions. - */ -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, -}; - -/* - * switch_add_handler - */ -static int switch_add_handler(struct switch_device *switch_dev, - struct proc_dir_entry *parent, - const struct switch_handler *handler, - int inst) -{ - struct switch_handler_entry *she; - struct proc_dir_entry *pde; - int mode; - - she = (struct switch_handler_entry *) - kzalloc(sizeof(struct switch_handler_entry), GFP_KERNEL); - if (!she) { - return -ENOMEM; - } - - INIT_LIST_HEAD(&she->node); - she->parent = parent; - she->dev = switch_dev; - she->inst = inst; - she->handler = handler; - list_add(&she->node, &switch_dev->handlers); - - mode = 0; - if (handler->read != NULL) { - mode |= S_IRUSR; - } - if (handler->write != NULL) { - mode |= S_IWUSR; - } - - pde = create_proc_entry(handler->name, mode, parent); - if (!pde) { - kfree(she); - printk("Failed to create node '%s' in parent %p\n", - handler->name, parent); - return -ENOMEM; - } - pde->data = (void *)she; - pde->proc_fops = &switch_proc_fops; - - return 0; -} - -/* - * switch_add_handlers - */ -static int switch_add_handlers(struct switch_device *switch_dev, - struct proc_dir_entry *parent, - const struct switch_handler *handlers, - int inst) -{ - while (handlers->name) { - int ret = switch_add_handler(switch_dev, - parent, handlers, inst); - if (ret) { - return ret; - } - handlers++; - } - - return 0; -} - -/* - * switch_remove_vlan_dirs - * Removes all vlan directories - * - * Assumes all vlan directories are empty, should be called after - * switch_remove_handlers - */ -static void switch_remove_vlan_dirs(struct switch_device *switch_dev) -{ - struct list_head *pos; - struct list_head *tmp; - struct switch_vlan_entry *sve; - - list_for_each_safe(pos, tmp, &switch_dev->vlan_dirs) { - sve = list_entry(pos, struct switch_vlan_entry, node); - list_del(pos); - remove_proc_entry(sve->pde->name, switch_dev->vlan_dir); - kfree(sve); - } -} - -/* - * switch_remove_handlers - * Removes all handlers registered to the given switch_device - */ -static void switch_remove_handlers(struct switch_device *switch_dev) -{ - struct list_head *pos; - struct list_head *tmp; - struct switch_handler_entry *she; - - list_for_each_safe(pos, tmp, &switch_dev->handlers) { - she = list_entry(pos, struct switch_handler_entry, node); - list_del(pos); - remove_proc_entry(she->handler->name, she->parent); - kfree(she); - } -} - -/* - * switch_unregister_proc_nodes - * Unregisters all proc nodes related to switch_dev - */ -void switch_unregister_proc_nodes(struct switch_device *switch_dev) -{ - switch_remove_handlers(switch_dev); - - if (switch_dev->port_dirs) { - int i; - - for (i = 0; i < switch_dev->ports; i++) { - if (switch_dev->port_dirs[i]) { - remove_proc_entry( - switch_dev->port_dirs[i]->name, - switch_dev->port_dir); - } - } - } - - if (switch_dev->port_dir) { - remove_proc_entry("port", switch_dev->driver_dir); - switch_dev->port_dir = NULL; - } - - if (switch_dev->reg_dir) { - remove_proc_entry("reg", switch_dev->reg_dir); - switch_dev->reg_dir = NULL; - } - - if (switch_dev->vlan_dir) { - switch_remove_vlan_dirs(switch_dev); - remove_proc_entry("vlan", switch_dev->driver_dir); - switch_dev->vlan_dir = NULL; - } - - if (switch_dev->driver_dir) { - remove_proc_entry(switch_dev->name, switch_root); - switch_dev->driver_dir = NULL; - } -} - -/* - * switch_remove_vlan_dir - * Removes vlan dir in switch/<switch_driver>/vlan/<vlan_id> - */ -int switch_remove_vlan_dir(struct switch_device *switch_dev, int vlan_id) -{ - struct list_head *pos; - struct switch_vlan_entry *sve = NULL; - - list_for_each(pos, &switch_dev->vlan_dirs) { - struct switch_vlan_entry *tmp = - list_entry(pos, struct switch_vlan_entry, node); - if (tmp->vlan_id == vlan_id) { - sve = tmp; - break; - } - } - - if (!sve) { - return -ENOENT; - } - - /* - * Remove it from the list - */ - list_del(pos); - - /* - * Remove the handlers - */ - while (sve->handlers->name) { - remove_proc_entry(sve->handlers->name, sve->pde); - sve->handlers++; - } - - /* - * Remove the proc entry for the <vlan_id> dir - */ - remove_proc_entry(sve->pde->name, switch_dev->vlan_dir); - - kfree(sve); - - return 0; -} - -/* - * switch_create_vlan_dir - * Creates vlan dir in switch/<switch_driver>/vlan/<vlan_id> - */ -int switch_create_vlan_dir(struct switch_device *switch_dev, - int vlan_id, const struct switch_handler *handlers) -{ - char s[14]; - struct proc_dir_entry *pde = NULL; - struct switch_vlan_entry *sve = NULL; - int ret; - struct list_head *pos; - - /* - * Check to see if it exists already - */ - list_for_each(pos, &switch_dev->vlan_dirs) { - sve = list_entry(pos, struct switch_vlan_entry, node); - if (sve->vlan_id == vlan_id) { - return -EEXIST; - } - } - sve = NULL; - - /* - * Create the vlan directory if we didn't have it before - */ - if (!switch_dev->vlan_dir) { - switch_dev->vlan_dir = proc_mkdir("vlan", - switch_dev->driver_dir); - if (!switch_dev->vlan_dir) { - goto fail; - } - if (switch_dev->vlan_handlers) { - ret = switch_add_handlers(switch_dev, - switch_dev->vlan_dir, - switch_dev->vlan_handlers, 0); - if (ret) { - goto fail; - } - } - } - - /* - * Create the vlan_id directory - */ - snprintf(s, 14, "%d", vlan_id); - pde = proc_mkdir(s, switch_dev->vlan_dir); - if (!pde) { - goto fail; - } - - /* - * Create the handlers for this vlan - */ - if (handlers) { - ret = switch_add_handlers(switch_dev, pde, handlers, vlan_id); - if (ret) { - goto fail; - } - } - - /* - * Keep track of all the switch vlan entries created - */ - sve = (struct switch_vlan_entry *) - kzalloc(sizeof(struct switch_vlan_entry), GFP_KERNEL); - if (!sve) { - goto fail; - } - INIT_LIST_HEAD(&sve->node); - sve->handlers = handlers; - sve->vlan_id = vlan_id; - sve->pde = pde; - list_add(&sve->node, &switch_dev->vlan_dirs); - - return 0; - -fail: - if (sve) { - kfree(sve); - } - - if (pde) { - /* - * Remove any proc entries we might have created - */ - while (handlers->name) { - remove_proc_entry(handlers->name, pde); - handlers++; - } - - remove_proc_entry(s, switch_dev->driver_dir); - } - - return -ENOMEM; -} - -/* - * switch_register_proc_nodes - */ -int switch_register_proc_nodes(struct switch_device *switch_dev) -{ - int i; - int n; - - switch_dev->port_dirs = kzalloc(switch_dev->ports * - sizeof(struct proc_dir_entry *), - GFP_KERNEL); - if (!switch_dev->port_dirs) { - return -ENOMEM; - } - - /* - * Create a new proc entry for this switch - */ - switch_dev->driver_dir = proc_mkdir(switch_dev->name, switch_root); - if (!switch_dev->driver_dir) { - goto fail; - } - if (switch_dev->driver_handlers) { - switch_add_handlers(switch_dev, - switch_dev->driver_dir, - switch_dev->driver_handlers, - 0); - } - - /* - * Create the ports - */ - switch_dev->port_dir = proc_mkdir("port", switch_dev->driver_dir); - if (!switch_dev->port_dir) { - goto fail; - } - for (n = 0, i = 0; i < (SWITCH_PORT_MASK_SIZE * 32); i++) { - if (switch_dev->port_mask[i / 32] & (1 << i % 32)) { - char s[14]; - - snprintf(s, 14, "%d", i); - switch_dev->port_dirs[n] = - proc_mkdir(s, switch_dev->port_dir); - if (!switch_dev->port_dirs[n]) { - goto fail; - } - if (switch_dev->port_handlers) { - switch_add_handlers(switch_dev, - switch_dev->port_dirs[n], - switch_dev->port_handlers, - i); - } - n++; - } - } - - /* - * Create the register directory for switch register access. - */ - if (switch_dev->reg_handlers) { - switch_dev->reg_dir = proc_mkdir("reg", switch_dev->driver_dir); - if (!switch_dev->reg_dir) { - goto fail; - } - - switch_add_handlers(switch_dev, - switch_dev->reg_dir, - switch_dev->reg_handlers, - 0); - } - - /* - * Create the vlan directory - */ - if (switch_dev->vlan_handlers) { - switch_dev->vlan_dir = proc_mkdir("vlan", - switch_dev->driver_dir); - if (!switch_dev->vlan_dir) { - goto fail; - } - if (switch_dev->vlan_handlers) { - switch_add_handlers(switch_dev, - switch_dev->vlan_dir, - switch_dev->vlan_handlers, - 0); - } - } - - return 0; - -fail: - switch_unregister_proc_nodes(switch_dev); - return -ENOMEM; -} - -/* - * switch_release - */ -void switch_release(struct switch_device *switch_dev) -{ - kfree(switch_dev); -} - -/* - * switch_alloc - */ -struct switch_device *switch_alloc(void) -{ - struct switch_device *switch_dev = - kzalloc(sizeof(struct switch_device), - GFP_KERNEL); - INIT_LIST_HEAD(&switch_dev->node); - INIT_LIST_HEAD(&switch_dev->vlan_dirs); - INIT_LIST_HEAD(&switch_dev->handlers); - return switch_dev; -} - -/* - * switch_register - */ -int switch_register(struct switch_device *switch_dev) -{ - int ret; - int i; - - /* - * Make sure that the number of ports and the port mask make sense - */ - for (ret = 0, i = 0; i < (SWITCH_PORT_MASK_SIZE * 32); i++) { - if (switch_dev->port_mask[i / 32] & (1 << i % 32)) { - ret++; - } - } - if (ret > switch_dev->ports) { - return -EINVAL; - } - - /* - * Create the /proc entries - */ - ret = switch_register_proc_nodes(switch_dev); - if (ret) { - return ret; - } - - /* - * Add it to the list of switches - */ - down_write(&switch_list_lock); - list_add_tail(&switch_dev->node, &switch_list); - up_write(&switch_list_lock); - - printk(KERN_INFO "Registered switch device: %s\n", switch_dev->name); - - return 0; -} -EXPORT_SYMBOL_GPL(switch_register); - -/* - * switch_unregister - * Unregisters a previously registered switch_device object - */ -void switch_unregister(struct switch_device *switch_dev) -{ - /* - * remove the proc entries - */ - switch_unregister_proc_nodes(switch_dev); - - /* - * Remove it from the list of switches - */ - down_write(&switch_list_lock); - list_del(&switch_dev->node); - up_write(&switch_list_lock); - - printk(KERN_INFO "Unregistered switch device: %s\n", switch_dev->name); -} -EXPORT_SYMBOL_GPL(switch_unregister); - -/* - * switch_init - */ -static int __init switch_init(void) -{ - switch_root = proc_mkdir("switch", NULL); - if (!switch_root) { - printk(KERN_WARNING "Failed to make root switch node\n"); - return -ENODEV; - } - return 0; -} -module_init(switch_init); - -/* - * switch_exit - */ -static void __exit switch_exit(void) -{ - remove_proc_entry("switch", NULL); -} -module_exit(switch_exit); - -MODULE_AUTHOR("Patrick Tjin"); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Ethernet Switch Class Interface"); |