| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * u_ether_configfs.h |
| * |
| * Utility definitions for configfs support in USB Ethernet functions |
| * |
| * Copyright (c) 2013 Samsung Electronics Co., Ltd. |
| * http://www.samsung.com |
| * |
| * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com> |
| */ |
| |
| #ifndef __U_ETHER_CONFIGFS_H |
| #define __U_ETHER_CONFIGFS_H |
| |
| #define USB_ETHERNET_CONFIGFS_ITEM(_f_) \ |
| static void _f_##_attr_release(struct config_item *item) \ |
| { \ |
| struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ |
| \ |
| usb_put_function_instance(&opts->func_inst); \ |
| } \ |
| \ |
| static struct configfs_item_operations _f_##_item_ops = { \ |
| .release = _f_##_attr_release, \ |
| } |
| |
| #define USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(_f_) \ |
| static ssize_t _f_##_opts_dev_addr_show(struct config_item *item, \ |
| char *page) \ |
| { \ |
| struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ |
| int result; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| result = gether_get_dev_addr(opts->net, page, PAGE_SIZE); \ |
| mutex_unlock(&opts->lock); \ |
| \ |
| return result; \ |
| } \ |
| \ |
| static ssize_t _f_##_opts_dev_addr_store(struct config_item *item, \ |
| const char *page, size_t len)\ |
| { \ |
| struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ |
| int ret; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| if (opts->refcnt) { \ |
| mutex_unlock(&opts->lock); \ |
| return -EBUSY; \ |
| } \ |
| \ |
| ret = gether_set_dev_addr(opts->net, page); \ |
| mutex_unlock(&opts->lock); \ |
| if (!ret) \ |
| ret = len; \ |
| return ret; \ |
| } \ |
| \ |
| CONFIGFS_ATTR(_f_##_opts_, dev_addr) |
| |
| #define USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(_f_) \ |
| static ssize_t _f_##_opts_host_addr_show(struct config_item *item, \ |
| char *page) \ |
| { \ |
| struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ |
| int result; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| result = gether_get_host_addr(opts->net, page, PAGE_SIZE); \ |
| mutex_unlock(&opts->lock); \ |
| \ |
| return result; \ |
| } \ |
| \ |
| static ssize_t _f_##_opts_host_addr_store(struct config_item *item, \ |
| const char *page, size_t len)\ |
| { \ |
| struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ |
| int ret; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| if (opts->refcnt) { \ |
| mutex_unlock(&opts->lock); \ |
| return -EBUSY; \ |
| } \ |
| \ |
| ret = gether_set_host_addr(opts->net, page); \ |
| mutex_unlock(&opts->lock); \ |
| if (!ret) \ |
| ret = len; \ |
| return ret; \ |
| } \ |
| \ |
| CONFIGFS_ATTR(_f_##_opts_, host_addr) |
| |
| #define USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(_f_) \ |
| static ssize_t _f_##_opts_qmult_show(struct config_item *item, \ |
| char *page) \ |
| { \ |
| struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ |
| unsigned qmult; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| qmult = gether_get_qmult(opts->net); \ |
| mutex_unlock(&opts->lock); \ |
| return sprintf(page, "%d\n", qmult); \ |
| } \ |
| \ |
| static ssize_t _f_##_opts_qmult_store(struct config_item *item, \ |
| const char *page, size_t len)\ |
| { \ |
| struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ |
| u8 val; \ |
| int ret; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| if (opts->refcnt) { \ |
| ret = -EBUSY; \ |
| goto out; \ |
| } \ |
| \ |
| ret = kstrtou8(page, 0, &val); \ |
| if (ret) \ |
| goto out; \ |
| \ |
| gether_set_qmult(opts->net, val); \ |
| ret = len; \ |
| out: \ |
| mutex_unlock(&opts->lock); \ |
| return ret; \ |
| } \ |
| \ |
| CONFIGFS_ATTR(_f_##_opts_, qmult) |
| |
| #define USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(_f_) \ |
| static ssize_t _f_##_opts_ifname_show(struct config_item *item, \ |
| char *page) \ |
| { \ |
| struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ |
| int ret; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| ret = gether_get_ifname(opts->net, page, PAGE_SIZE); \ |
| mutex_unlock(&opts->lock); \ |
| \ |
| return ret; \ |
| } \ |
| \ |
| CONFIGFS_ATTR_RO(_f_##_opts_, ifname) |
| |
| #define USB_ETHER_CONFIGFS_ITEM_ATTR_U8_RW(_f_, _n_) \ |
| static ssize_t _f_##_opts_##_n_##_show(struct config_item *item,\ |
| char *page) \ |
| { \ |
| struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ |
| int ret; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| ret = sprintf(page, "%02x\n", opts->_n_); \ |
| mutex_unlock(&opts->lock); \ |
| \ |
| return ret; \ |
| } \ |
| \ |
| static ssize_t _f_##_opts_##_n_##_store(struct config_item *item,\ |
| const char *page, \ |
| size_t len) \ |
| { \ |
| struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ |
| int ret; \ |
| u8 val; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| ret = sscanf(page, "%02hhx", &val); \ |
| if (ret > 0) { \ |
| opts->_n_ = val; \ |
| ret = len; \ |
| } \ |
| mutex_unlock(&opts->lock); \ |
| \ |
| return ret; \ |
| } \ |
| \ |
| CONFIGFS_ATTR(_f_##_opts_, _n_) |
| |
| #endif /* __U_ETHER_CONFIGFS_H */ |