1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* Copyright (c) 2021, Microsoft Corporation. */ 3 4 #include <linux/inetdevice.h> 5 #include <linux/etherdevice.h> 6 #include <linux/ethtool.h> 7 8 #include <net/mana/mana.h> 9 10 static const struct { 11 char name[ETH_GSTRING_LEN]; 12 u16 offset; 13 } mana_eth_stats[] = { 14 {"stop_queue", offsetof(struct mana_ethtool_stats, stop_queue)}, 15 {"wake_queue", offsetof(struct mana_ethtool_stats, wake_queue)}, 16 {"tx_cq_err", offsetof(struct mana_ethtool_stats, tx_cqe_err)}, 17 {"tx_cqe_unknown_type", offsetof(struct mana_ethtool_stats, 18 tx_cqe_unknown_type)}, 19 {"rx_coalesced_err", offsetof(struct mana_ethtool_stats, 20 rx_coalesced_err)}, 21 {"rx_cqe_unknown_type", offsetof(struct mana_ethtool_stats, 22 rx_cqe_unknown_type)}, 23 }; 24 25 static int mana_get_sset_count(struct net_device *ndev, int stringset) 26 { 27 struct mana_port_context *apc = netdev_priv(ndev); 28 unsigned int num_queues = apc->num_queues; 29 30 if (stringset != ETH_SS_STATS) 31 return -EINVAL; 32 33 return ARRAY_SIZE(mana_eth_stats) + num_queues * 34 (MANA_STATS_RX_COUNT + MANA_STATS_TX_COUNT); 35 } 36 37 static void mana_get_strings(struct net_device *ndev, u32 stringset, u8 *data) 38 { 39 struct mana_port_context *apc = netdev_priv(ndev); 40 unsigned int num_queues = apc->num_queues; 41 u8 *p = data; 42 int i; 43 44 if (stringset != ETH_SS_STATS) 45 return; 46 47 for (i = 0; i < ARRAY_SIZE(mana_eth_stats); i++) { 48 memcpy(p, mana_eth_stats[i].name, ETH_GSTRING_LEN); 49 p += ETH_GSTRING_LEN; 50 } 51 52 for (i = 0; i < num_queues; i++) { 53 sprintf(p, "rx_%d_packets", i); 54 p += ETH_GSTRING_LEN; 55 sprintf(p, "rx_%d_bytes", i); 56 p += ETH_GSTRING_LEN; 57 sprintf(p, "rx_%d_xdp_drop", i); 58 p += ETH_GSTRING_LEN; 59 sprintf(p, "rx_%d_xdp_tx", i); 60 p += ETH_GSTRING_LEN; 61 sprintf(p, "rx_%d_xdp_redirect", i); 62 p += ETH_GSTRING_LEN; 63 } 64 65 for (i = 0; i < num_queues; i++) { 66 sprintf(p, "tx_%d_packets", i); 67 p += ETH_GSTRING_LEN; 68 sprintf(p, "tx_%d_bytes", i); 69 p += ETH_GSTRING_LEN; 70 sprintf(p, "tx_%d_xdp_xmit", i); 71 p += ETH_GSTRING_LEN; 72 sprintf(p, "tx_%d_tso_packets", i); 73 p += ETH_GSTRING_LEN; 74 sprintf(p, "tx_%d_tso_bytes", i); 75 p += ETH_GSTRING_LEN; 76 sprintf(p, "tx_%d_tso_inner_packets", i); 77 p += ETH_GSTRING_LEN; 78 sprintf(p, "tx_%d_tso_inner_bytes", i); 79 p += ETH_GSTRING_LEN; 80 sprintf(p, "tx_%d_long_pkt_fmt", i); 81 p += ETH_GSTRING_LEN; 82 sprintf(p, "tx_%d_short_pkt_fmt", i); 83 p += ETH_GSTRING_LEN; 84 sprintf(p, "tx_%d_csum_partial", i); 85 p += ETH_GSTRING_LEN; 86 sprintf(p, "tx_%d_mana_map_err", i); 87 p += ETH_GSTRING_LEN; 88 } 89 } 90 91 static void mana_get_ethtool_stats(struct net_device *ndev, 92 struct ethtool_stats *e_stats, u64 *data) 93 { 94 struct mana_port_context *apc = netdev_priv(ndev); 95 unsigned int num_queues = apc->num_queues; 96 void *eth_stats = &apc->eth_stats; 97 struct mana_stats_rx *rx_stats; 98 struct mana_stats_tx *tx_stats; 99 unsigned int start; 100 u64 packets, bytes; 101 u64 xdp_redirect; 102 u64 xdp_xmit; 103 u64 xdp_drop; 104 u64 xdp_tx; 105 u64 tso_packets; 106 u64 tso_bytes; 107 u64 tso_inner_packets; 108 u64 tso_inner_bytes; 109 u64 long_pkt_fmt; 110 u64 short_pkt_fmt; 111 u64 csum_partial; 112 u64 mana_map_err; 113 int q, i = 0; 114 115 if (!apc->port_is_up) 116 return; 117 118 for (q = 0; q < ARRAY_SIZE(mana_eth_stats); q++) 119 data[i++] = *(u64 *)(eth_stats + mana_eth_stats[q].offset); 120 121 for (q = 0; q < num_queues; q++) { 122 rx_stats = &apc->rxqs[q]->stats; 123 124 do { 125 start = u64_stats_fetch_begin(&rx_stats->syncp); 126 packets = rx_stats->packets; 127 bytes = rx_stats->bytes; 128 xdp_drop = rx_stats->xdp_drop; 129 xdp_tx = rx_stats->xdp_tx; 130 xdp_redirect = rx_stats->xdp_redirect; 131 } while (u64_stats_fetch_retry(&rx_stats->syncp, start)); 132 133 data[i++] = packets; 134 data[i++] = bytes; 135 data[i++] = xdp_drop; 136 data[i++] = xdp_tx; 137 data[i++] = xdp_redirect; 138 } 139 140 for (q = 0; q < num_queues; q++) { 141 tx_stats = &apc->tx_qp[q].txq.stats; 142 143 do { 144 start = u64_stats_fetch_begin(&tx_stats->syncp); 145 packets = tx_stats->packets; 146 bytes = tx_stats->bytes; 147 xdp_xmit = tx_stats->xdp_xmit; 148 tso_packets = tx_stats->tso_packets; 149 tso_bytes = tx_stats->tso_bytes; 150 tso_inner_packets = tx_stats->tso_inner_packets; 151 tso_inner_bytes = tx_stats->tso_inner_bytes; 152 long_pkt_fmt = tx_stats->long_pkt_fmt; 153 short_pkt_fmt = tx_stats->short_pkt_fmt; 154 csum_partial = tx_stats->csum_partial; 155 mana_map_err = tx_stats->mana_map_err; 156 } while (u64_stats_fetch_retry(&tx_stats->syncp, start)); 157 158 data[i++] = packets; 159 data[i++] = bytes; 160 data[i++] = xdp_xmit; 161 data[i++] = tso_packets; 162 data[i++] = tso_bytes; 163 data[i++] = tso_inner_packets; 164 data[i++] = tso_inner_bytes; 165 data[i++] = long_pkt_fmt; 166 data[i++] = short_pkt_fmt; 167 data[i++] = csum_partial; 168 data[i++] = mana_map_err; 169 } 170 } 171 172 static int mana_get_rxnfc(struct net_device *ndev, struct ethtool_rxnfc *cmd, 173 u32 *rules) 174 { 175 struct mana_port_context *apc = netdev_priv(ndev); 176 177 switch (cmd->cmd) { 178 case ETHTOOL_GRXRINGS: 179 cmd->data = apc->num_queues; 180 return 0; 181 } 182 183 return -EOPNOTSUPP; 184 } 185 186 static u32 mana_get_rxfh_key_size(struct net_device *ndev) 187 { 188 return MANA_HASH_KEY_SIZE; 189 } 190 191 static u32 mana_rss_indir_size(struct net_device *ndev) 192 { 193 return MANA_INDIRECT_TABLE_SIZE; 194 } 195 196 static int mana_get_rxfh(struct net_device *ndev, u32 *indir, u8 *key, 197 u8 *hfunc) 198 { 199 struct mana_port_context *apc = netdev_priv(ndev); 200 int i; 201 202 if (hfunc) 203 *hfunc = ETH_RSS_HASH_TOP; /* Toeplitz */ 204 205 if (indir) { 206 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) 207 indir[i] = apc->indir_table[i]; 208 } 209 210 if (key) 211 memcpy(key, apc->hashkey, MANA_HASH_KEY_SIZE); 212 213 return 0; 214 } 215 216 static int mana_set_rxfh(struct net_device *ndev, const u32 *indir, 217 const u8 *key, const u8 hfunc) 218 { 219 struct mana_port_context *apc = netdev_priv(ndev); 220 bool update_hash = false, update_table = false; 221 u32 save_table[MANA_INDIRECT_TABLE_SIZE]; 222 u8 save_key[MANA_HASH_KEY_SIZE]; 223 int i, err; 224 225 if (!apc->port_is_up) 226 return -EOPNOTSUPP; 227 228 if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP) 229 return -EOPNOTSUPP; 230 231 if (indir) { 232 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) 233 if (indir[i] >= apc->num_queues) 234 return -EINVAL; 235 236 update_table = true; 237 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) { 238 save_table[i] = apc->indir_table[i]; 239 apc->indir_table[i] = indir[i]; 240 } 241 } 242 243 if (key) { 244 update_hash = true; 245 memcpy(save_key, apc->hashkey, MANA_HASH_KEY_SIZE); 246 memcpy(apc->hashkey, key, MANA_HASH_KEY_SIZE); 247 } 248 249 err = mana_config_rss(apc, TRI_STATE_TRUE, update_hash, update_table); 250 251 if (err) { /* recover to original values */ 252 if (update_table) { 253 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) 254 apc->indir_table[i] = save_table[i]; 255 } 256 257 if (update_hash) 258 memcpy(apc->hashkey, save_key, MANA_HASH_KEY_SIZE); 259 260 mana_config_rss(apc, TRI_STATE_TRUE, update_hash, update_table); 261 } 262 263 return err; 264 } 265 266 static void mana_get_channels(struct net_device *ndev, 267 struct ethtool_channels *channel) 268 { 269 struct mana_port_context *apc = netdev_priv(ndev); 270 271 channel->max_combined = apc->max_queues; 272 channel->combined_count = apc->num_queues; 273 } 274 275 static int mana_set_channels(struct net_device *ndev, 276 struct ethtool_channels *channels) 277 { 278 struct mana_port_context *apc = netdev_priv(ndev); 279 unsigned int new_count = channels->combined_count; 280 unsigned int old_count = apc->num_queues; 281 int err, err2; 282 283 err = mana_detach(ndev, false); 284 if (err) { 285 netdev_err(ndev, "mana_detach failed: %d\n", err); 286 return err; 287 } 288 289 apc->num_queues = new_count; 290 err = mana_attach(ndev); 291 if (!err) 292 return 0; 293 294 netdev_err(ndev, "mana_attach failed: %d\n", err); 295 296 /* Try to roll it back to the old configuration. */ 297 apc->num_queues = old_count; 298 err2 = mana_attach(ndev); 299 if (err2) 300 netdev_err(ndev, "mana re-attach failed: %d\n", err2); 301 302 return err; 303 } 304 305 const struct ethtool_ops mana_ethtool_ops = { 306 .get_ethtool_stats = mana_get_ethtool_stats, 307 .get_sset_count = mana_get_sset_count, 308 .get_strings = mana_get_strings, 309 .get_rxnfc = mana_get_rxnfc, 310 .get_rxfh_key_size = mana_get_rxfh_key_size, 311 .get_rxfh_indir_size = mana_rss_indir_size, 312 .get_rxfh = mana_get_rxfh, 313 .set_rxfh = mana_set_rxfh, 314 .get_channels = mana_get_channels, 315 .set_channels = mana_set_channels, 316 }; 317