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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 | /* 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; \ } \ \ static ssize_t _f_##_opts_ifname_store(struct config_item *item, \ const char *page, size_t len)\ { \ struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ int ret = -EBUSY; \ \ mutex_lock(&opts->lock); \ if (!opts->refcnt) \ ret = gether_set_ifname(opts->net, page, len); \ mutex_unlock(&opts->lock); \ return ret ?: len; \ } \ \ CONFIGFS_ATTR(_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 = -EINVAL; \ u8 val; \ \ mutex_lock(&opts->lock); \ if (sscanf(page, "%02hhx", &val) > 0) { \ opts->_n_ = val; \ ret = len; \ } \ mutex_unlock(&opts->lock); \ \ return ret; \ } \ \ CONFIGFS_ATTR(_f_##_opts_, _n_) #endif /* __U_ETHER_CONFIGFS_H */ |