1 // SPDX-License-Identifier: GPL-2.0-only 2 3 #include "netlink.h" 4 #include "common.h" 5 #include "bitset.h" 6 7 struct fec_req_info { 8 struct ethnl_req_info base; 9 }; 10 11 struct fec_reply_data { 12 struct ethnl_reply_data base; 13 __ETHTOOL_DECLARE_LINK_MODE_MASK(fec_link_modes); 14 u32 active_fec; 15 u8 fec_auto; 16 struct fec_stat_grp { 17 u64 stats[1 + ETHTOOL_MAX_LANES]; 18 u8 cnt; 19 } corr, uncorr, corr_bits; 20 }; 21 22 #define FEC_REPDATA(__reply_base) \ 23 container_of(__reply_base, struct fec_reply_data, base) 24 25 #define ETHTOOL_FEC_MASK ((ETHTOOL_FEC_LLRS << 1) - 1) 26 27 const struct nla_policy ethnl_fec_get_policy[ETHTOOL_A_FEC_HEADER + 1] = { 28 [ETHTOOL_A_FEC_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy_stats), 29 }; 30 31 static void 32 ethtool_fec_to_link_modes(u32 fec, unsigned long *link_modes, u8 *fec_auto) 33 { 34 if (fec_auto) 35 *fec_auto = !!(fec & ETHTOOL_FEC_AUTO); 36 37 if (fec & ETHTOOL_FEC_OFF) 38 __set_bit(ETHTOOL_LINK_MODE_FEC_NONE_BIT, link_modes); 39 if (fec & ETHTOOL_FEC_RS) 40 __set_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT, link_modes); 41 if (fec & ETHTOOL_FEC_BASER) 42 __set_bit(ETHTOOL_LINK_MODE_FEC_BASER_BIT, link_modes); 43 if (fec & ETHTOOL_FEC_LLRS) 44 __set_bit(ETHTOOL_LINK_MODE_FEC_LLRS_BIT, link_modes); 45 } 46 47 static int 48 ethtool_link_modes_to_fecparam(struct ethtool_fecparam *fec, 49 unsigned long *link_modes, u8 fec_auto) 50 { 51 memset(fec, 0, sizeof(*fec)); 52 53 if (fec_auto) 54 fec->fec |= ETHTOOL_FEC_AUTO; 55 56 if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_NONE_BIT, link_modes)) 57 fec->fec |= ETHTOOL_FEC_OFF; 58 if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT, link_modes)) 59 fec->fec |= ETHTOOL_FEC_RS; 60 if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_BASER_BIT, link_modes)) 61 fec->fec |= ETHTOOL_FEC_BASER; 62 if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_LLRS_BIT, link_modes)) 63 fec->fec |= ETHTOOL_FEC_LLRS; 64 65 if (!bitmap_empty(link_modes, __ETHTOOL_LINK_MODE_MASK_NBITS)) 66 return -EINVAL; 67 68 return 0; 69 } 70 71 static void 72 fec_stats_recalc(struct fec_stat_grp *grp, struct ethtool_fec_stat *stats) 73 { 74 int i; 75 76 if (stats->lanes[0] == ETHTOOL_STAT_NOT_SET) { 77 grp->stats[0] = stats->total; 78 grp->cnt = stats->total != ETHTOOL_STAT_NOT_SET; 79 return; 80 } 81 82 grp->cnt = 1; 83 grp->stats[0] = 0; 84 for (i = 0; i < ETHTOOL_MAX_LANES; i++) { 85 if (stats->lanes[i] == ETHTOOL_STAT_NOT_SET) 86 break; 87 88 grp->stats[0] += stats->lanes[i]; 89 grp->stats[grp->cnt++] = stats->lanes[i]; 90 } 91 } 92 93 static int fec_prepare_data(const struct ethnl_req_info *req_base, 94 struct ethnl_reply_data *reply_base, 95 const struct genl_info *info) 96 { 97 __ETHTOOL_DECLARE_LINK_MODE_MASK(active_fec_modes) = {}; 98 struct fec_reply_data *data = FEC_REPDATA(reply_base); 99 struct net_device *dev = reply_base->dev; 100 struct ethtool_fecparam fec = {}; 101 int ret; 102 103 if (!dev->ethtool_ops->get_fecparam) 104 return -EOPNOTSUPP; 105 ret = ethnl_ops_begin(dev); 106 if (ret < 0) 107 return ret; 108 ret = dev->ethtool_ops->get_fecparam(dev, &fec); 109 if (ret) 110 goto out_complete; 111 if (req_base->flags & ETHTOOL_FLAG_STATS && 112 dev->ethtool_ops->get_fec_stats) { 113 struct ethtool_fec_stats stats; 114 115 ethtool_stats_init((u64 *)&stats, sizeof(stats) / 8); 116 dev->ethtool_ops->get_fec_stats(dev, &stats); 117 118 fec_stats_recalc(&data->corr, &stats.corrected_blocks); 119 fec_stats_recalc(&data->uncorr, &stats.uncorrectable_blocks); 120 fec_stats_recalc(&data->corr_bits, &stats.corrected_bits); 121 } 122 123 WARN_ON_ONCE(fec.reserved); 124 125 ethtool_fec_to_link_modes(fec.fec, data->fec_link_modes, 126 &data->fec_auto); 127 128 ethtool_fec_to_link_modes(fec.active_fec, active_fec_modes, NULL); 129 data->active_fec = find_first_bit(active_fec_modes, 130 __ETHTOOL_LINK_MODE_MASK_NBITS); 131 /* Don't report attr if no FEC mode set. Note that 132 * ethtool_fecparam_to_link_modes() ignores NONE and AUTO. 133 */ 134 if (data->active_fec == __ETHTOOL_LINK_MODE_MASK_NBITS) 135 data->active_fec = 0; 136 137 out_complete: 138 ethnl_ops_complete(dev); 139 return ret; 140 } 141 142 static int fec_reply_size(const struct ethnl_req_info *req_base, 143 const struct ethnl_reply_data *reply_base) 144 { 145 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; 146 const struct fec_reply_data *data = FEC_REPDATA(reply_base); 147 int len = 0; 148 int ret; 149 150 ret = ethnl_bitset_size(data->fec_link_modes, NULL, 151 __ETHTOOL_LINK_MODE_MASK_NBITS, 152 link_mode_names, compact); 153 if (ret < 0) 154 return ret; 155 len += ret; 156 157 len += nla_total_size(sizeof(u8)) + /* _FEC_AUTO */ 158 nla_total_size(sizeof(u32)); /* _FEC_ACTIVE */ 159 160 if (req_base->flags & ETHTOOL_FLAG_STATS) 161 len += 3 * nla_total_size_64bit(sizeof(u64) * 162 (1 + ETHTOOL_MAX_LANES)); 163 164 return len; 165 } 166 167 static int fec_put_stats(struct sk_buff *skb, const struct fec_reply_data *data) 168 { 169 struct nlattr *nest; 170 171 nest = nla_nest_start(skb, ETHTOOL_A_FEC_STATS); 172 if (!nest) 173 return -EMSGSIZE; 174 175 if (nla_put_64bit(skb, ETHTOOL_A_FEC_STAT_CORRECTED, 176 sizeof(u64) * data->corr.cnt, 177 data->corr.stats, ETHTOOL_A_FEC_STAT_PAD) || 178 nla_put_64bit(skb, ETHTOOL_A_FEC_STAT_UNCORR, 179 sizeof(u64) * data->uncorr.cnt, 180 data->uncorr.stats, ETHTOOL_A_FEC_STAT_PAD) || 181 nla_put_64bit(skb, ETHTOOL_A_FEC_STAT_CORR_BITS, 182 sizeof(u64) * data->corr_bits.cnt, 183 data->corr_bits.stats, ETHTOOL_A_FEC_STAT_PAD)) 184 goto err_cancel; 185 186 nla_nest_end(skb, nest); 187 return 0; 188 189 err_cancel: 190 nla_nest_cancel(skb, nest); 191 return -EMSGSIZE; 192 } 193 194 static int fec_fill_reply(struct sk_buff *skb, 195 const struct ethnl_req_info *req_base, 196 const struct ethnl_reply_data *reply_base) 197 { 198 bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; 199 const struct fec_reply_data *data = FEC_REPDATA(reply_base); 200 int ret; 201 202 ret = ethnl_put_bitset(skb, ETHTOOL_A_FEC_MODES, 203 data->fec_link_modes, NULL, 204 __ETHTOOL_LINK_MODE_MASK_NBITS, 205 link_mode_names, compact); 206 if (ret < 0) 207 return ret; 208 209 if (nla_put_u8(skb, ETHTOOL_A_FEC_AUTO, data->fec_auto) || 210 (data->active_fec && 211 nla_put_u32(skb, ETHTOOL_A_FEC_ACTIVE, data->active_fec))) 212 return -EMSGSIZE; 213 214 if (req_base->flags & ETHTOOL_FLAG_STATS && fec_put_stats(skb, data)) 215 return -EMSGSIZE; 216 217 return 0; 218 } 219 220 /* FEC_SET */ 221 222 const struct nla_policy ethnl_fec_set_policy[ETHTOOL_A_FEC_AUTO + 1] = { 223 [ETHTOOL_A_FEC_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), 224 [ETHTOOL_A_FEC_MODES] = { .type = NLA_NESTED }, 225 [ETHTOOL_A_FEC_AUTO] = NLA_POLICY_MAX(NLA_U8, 1), 226 }; 227 228 static int 229 ethnl_set_fec_validate(struct ethnl_req_info *req_info, struct genl_info *info) 230 { 231 const struct ethtool_ops *ops = req_info->dev->ethtool_ops; 232 233 return ops->get_fecparam && ops->set_fecparam ? 1 : -EOPNOTSUPP; 234 } 235 236 static int 237 ethnl_set_fec(struct ethnl_req_info *req_info, struct genl_info *info) 238 { 239 __ETHTOOL_DECLARE_LINK_MODE_MASK(fec_link_modes) = {}; 240 struct net_device *dev = req_info->dev; 241 struct nlattr **tb = info->attrs; 242 struct ethtool_fecparam fec = {}; 243 bool mod = false; 244 u8 fec_auto; 245 int ret; 246 247 ret = dev->ethtool_ops->get_fecparam(dev, &fec); 248 if (ret < 0) 249 return ret; 250 251 ethtool_fec_to_link_modes(fec.fec, fec_link_modes, &fec_auto); 252 253 ret = ethnl_update_bitset(fec_link_modes, 254 __ETHTOOL_LINK_MODE_MASK_NBITS, 255 tb[ETHTOOL_A_FEC_MODES], 256 link_mode_names, info->extack, &mod); 257 if (ret < 0) 258 return ret; 259 ethnl_update_u8(&fec_auto, tb[ETHTOOL_A_FEC_AUTO], &mod); 260 if (!mod) 261 return 0; 262 263 ret = ethtool_link_modes_to_fecparam(&fec, fec_link_modes, fec_auto); 264 if (ret) { 265 NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_FEC_MODES], 266 "invalid FEC modes requested"); 267 return ret; 268 } 269 if (!fec.fec) { 270 NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_FEC_MODES], 271 "no FEC modes set"); 272 return -EINVAL; 273 } 274 275 ret = dev->ethtool_ops->set_fecparam(dev, &fec); 276 return ret < 0 ? ret : 1; 277 } 278 279 const struct ethnl_request_ops ethnl_fec_request_ops = { 280 .request_cmd = ETHTOOL_MSG_FEC_GET, 281 .reply_cmd = ETHTOOL_MSG_FEC_GET_REPLY, 282 .hdr_attr = ETHTOOL_A_FEC_HEADER, 283 .req_info_size = sizeof(struct fec_req_info), 284 .reply_data_size = sizeof(struct fec_reply_data), 285 286 .prepare_data = fec_prepare_data, 287 .reply_size = fec_reply_size, 288 .fill_reply = fec_fill_reply, 289 290 .set_validate = ethnl_set_fec_validate, 291 .set = ethnl_set_fec, 292 .set_ntf_cmd = ETHTOOL_MSG_FEC_NTF, 293 }; 294