1 /*- 2 * Copyright (c) 2016 Solarflare Communications Inc. 3 * All rights reserved. 4 * 5 * This software was jointly developed between OKTET Labs (under contract 6 * for Solarflare) and Solarflare Communications, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 19 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 21 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 27 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <rte_dev.h> 31 #include <rte_ethdev.h> 32 #include <rte_pci.h> 33 34 #include "efx.h" 35 36 #include "sfc.h" 37 #include "sfc_debug.h" 38 #include "sfc_log.h" 39 #include "sfc_kvargs.h" 40 #include "sfc_ev.h" 41 #include "sfc_rx.h" 42 #include "sfc_tx.h" 43 44 45 static void 46 sfc_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) 47 { 48 struct sfc_adapter *sa = dev->data->dev_private; 49 50 sfc_log_init(sa, "entry"); 51 52 dev_info->pci_dev = RTE_DEV_TO_PCI(dev->device); 53 dev_info->max_rx_pktlen = EFX_MAC_PDU_MAX; 54 55 dev_info->max_rx_queues = sa->rxq_max; 56 dev_info->max_tx_queues = sa->txq_max; 57 58 /* By default packets are dropped if no descriptors are available */ 59 dev_info->default_rxconf.rx_drop_en = 1; 60 61 dev_info->tx_offload_capa = 62 DEV_TX_OFFLOAD_IPV4_CKSUM | 63 DEV_TX_OFFLOAD_UDP_CKSUM | 64 DEV_TX_OFFLOAD_TCP_CKSUM; 65 66 dev_info->default_txconf.txq_flags = ETH_TXQ_FLAGS_NOVLANOFFL | 67 ETH_TXQ_FLAGS_NOXSUMSCTP; 68 69 dev_info->rx_desc_lim.nb_max = EFX_RXQ_MAXNDESCS; 70 dev_info->rx_desc_lim.nb_min = EFX_RXQ_MINNDESCS; 71 /* The RXQ hardware requires that the descriptor count is a power 72 * of 2, but rx_desc_lim cannot properly describe that constraint. 73 */ 74 dev_info->rx_desc_lim.nb_align = EFX_RXQ_MINNDESCS; 75 76 dev_info->tx_desc_lim.nb_max = sa->txq_max_entries; 77 dev_info->tx_desc_lim.nb_min = EFX_TXQ_MINNDESCS; 78 /* 79 * The TXQ hardware requires that the descriptor count is a power 80 * of 2, but tx_desc_lim cannot properly describe that constraint 81 */ 82 dev_info->tx_desc_lim.nb_align = EFX_TXQ_MINNDESCS; 83 } 84 85 static int 86 sfc_dev_configure(struct rte_eth_dev *dev) 87 { 88 struct rte_eth_dev_data *dev_data = dev->data; 89 struct sfc_adapter *sa = dev_data->dev_private; 90 int rc; 91 92 sfc_log_init(sa, "entry n_rxq=%u n_txq=%u", 93 dev_data->nb_rx_queues, dev_data->nb_tx_queues); 94 95 sfc_adapter_lock(sa); 96 switch (sa->state) { 97 case SFC_ADAPTER_CONFIGURED: 98 sfc_close(sa); 99 SFC_ASSERT(sa->state == SFC_ADAPTER_INITIALIZED); 100 /* FALLTHROUGH */ 101 case SFC_ADAPTER_INITIALIZED: 102 rc = sfc_configure(sa); 103 break; 104 default: 105 sfc_err(sa, "unexpected adapter state %u to configure", 106 sa->state); 107 rc = EINVAL; 108 break; 109 } 110 sfc_adapter_unlock(sa); 111 112 sfc_log_init(sa, "done %d", rc); 113 SFC_ASSERT(rc >= 0); 114 return -rc; 115 } 116 117 static int 118 sfc_dev_start(struct rte_eth_dev *dev) 119 { 120 struct sfc_adapter *sa = dev->data->dev_private; 121 int rc; 122 123 sfc_log_init(sa, "entry"); 124 125 sfc_adapter_lock(sa); 126 rc = sfc_start(sa); 127 sfc_adapter_unlock(sa); 128 129 sfc_log_init(sa, "done %d", rc); 130 SFC_ASSERT(rc >= 0); 131 return -rc; 132 } 133 134 static int 135 sfc_dev_link_update(struct rte_eth_dev *dev, int wait_to_complete) 136 { 137 struct sfc_adapter *sa = dev->data->dev_private; 138 struct rte_eth_link *dev_link = &dev->data->dev_link; 139 struct rte_eth_link old_link; 140 struct rte_eth_link current_link; 141 142 sfc_log_init(sa, "entry"); 143 144 if (sa->state != SFC_ADAPTER_STARTED) 145 return 0; 146 147 retry: 148 EFX_STATIC_ASSERT(sizeof(*dev_link) == sizeof(rte_atomic64_t)); 149 *(int64_t *)&old_link = rte_atomic64_read((rte_atomic64_t *)dev_link); 150 151 if (wait_to_complete) { 152 efx_link_mode_t link_mode; 153 154 efx_port_poll(sa->nic, &link_mode); 155 sfc_port_link_mode_to_info(link_mode, ¤t_link); 156 157 if (!rte_atomic64_cmpset((volatile uint64_t *)dev_link, 158 *(uint64_t *)&old_link, 159 *(uint64_t *)¤t_link)) 160 goto retry; 161 } else { 162 sfc_ev_mgmt_qpoll(sa); 163 *(int64_t *)¤t_link = 164 rte_atomic64_read((rte_atomic64_t *)dev_link); 165 } 166 167 if (old_link.link_status != current_link.link_status) 168 sfc_info(sa, "Link status is %s", 169 current_link.link_status ? "UP" : "DOWN"); 170 171 return old_link.link_status == current_link.link_status ? 0 : -1; 172 } 173 174 static void 175 sfc_dev_stop(struct rte_eth_dev *dev) 176 { 177 struct sfc_adapter *sa = dev->data->dev_private; 178 179 sfc_log_init(sa, "entry"); 180 181 sfc_adapter_lock(sa); 182 sfc_stop(sa); 183 sfc_adapter_unlock(sa); 184 185 sfc_log_init(sa, "done"); 186 } 187 188 static void 189 sfc_dev_close(struct rte_eth_dev *dev) 190 { 191 struct sfc_adapter *sa = dev->data->dev_private; 192 193 sfc_log_init(sa, "entry"); 194 195 sfc_adapter_lock(sa); 196 switch (sa->state) { 197 case SFC_ADAPTER_STARTED: 198 sfc_stop(sa); 199 SFC_ASSERT(sa->state == SFC_ADAPTER_CONFIGURED); 200 /* FALLTHROUGH */ 201 case SFC_ADAPTER_CONFIGURED: 202 sfc_close(sa); 203 SFC_ASSERT(sa->state == SFC_ADAPTER_INITIALIZED); 204 /* FALLTHROUGH */ 205 case SFC_ADAPTER_INITIALIZED: 206 break; 207 default: 208 sfc_err(sa, "unexpected adapter state %u on close", sa->state); 209 break; 210 } 211 sfc_adapter_unlock(sa); 212 213 sfc_log_init(sa, "done"); 214 } 215 216 static int 217 sfc_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id, 218 uint16_t nb_rx_desc, unsigned int socket_id, 219 const struct rte_eth_rxconf *rx_conf, 220 struct rte_mempool *mb_pool) 221 { 222 struct sfc_adapter *sa = dev->data->dev_private; 223 int rc; 224 225 sfc_log_init(sa, "RxQ=%u nb_rx_desc=%u socket_id=%u", 226 rx_queue_id, nb_rx_desc, socket_id); 227 228 sfc_adapter_lock(sa); 229 230 rc = sfc_rx_qinit(sa, rx_queue_id, nb_rx_desc, socket_id, 231 rx_conf, mb_pool); 232 if (rc != 0) 233 goto fail_rx_qinit; 234 235 dev->data->rx_queues[rx_queue_id] = sa->rxq_info[rx_queue_id].rxq; 236 237 sfc_adapter_unlock(sa); 238 239 return 0; 240 241 fail_rx_qinit: 242 sfc_adapter_unlock(sa); 243 SFC_ASSERT(rc > 0); 244 return -rc; 245 } 246 247 static void 248 sfc_rx_queue_release(void *queue) 249 { 250 struct sfc_rxq *rxq = queue; 251 struct sfc_adapter *sa; 252 unsigned int sw_index; 253 254 if (rxq == NULL) 255 return; 256 257 sa = rxq->evq->sa; 258 sfc_adapter_lock(sa); 259 260 sw_index = sfc_rxq_sw_index(rxq); 261 262 sfc_log_init(sa, "RxQ=%u", sw_index); 263 264 sa->eth_dev->data->rx_queues[sw_index] = NULL; 265 266 sfc_rx_qfini(sa, sw_index); 267 268 sfc_adapter_unlock(sa); 269 } 270 271 static int 272 sfc_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id, 273 uint16_t nb_tx_desc, unsigned int socket_id, 274 const struct rte_eth_txconf *tx_conf) 275 { 276 struct sfc_adapter *sa = dev->data->dev_private; 277 int rc; 278 279 sfc_log_init(sa, "TxQ = %u, nb_tx_desc = %u, socket_id = %u", 280 tx_queue_id, nb_tx_desc, socket_id); 281 282 sfc_adapter_lock(sa); 283 284 rc = sfc_tx_qinit(sa, tx_queue_id, nb_tx_desc, socket_id, tx_conf); 285 if (rc != 0) 286 goto fail_tx_qinit; 287 288 dev->data->tx_queues[tx_queue_id] = sa->txq_info[tx_queue_id].txq; 289 290 sfc_adapter_unlock(sa); 291 return 0; 292 293 fail_tx_qinit: 294 sfc_adapter_unlock(sa); 295 SFC_ASSERT(rc > 0); 296 return -rc; 297 } 298 299 static void 300 sfc_tx_queue_release(void *queue) 301 { 302 struct sfc_txq *txq = queue; 303 unsigned int sw_index; 304 struct sfc_adapter *sa; 305 306 if (txq == NULL) 307 return; 308 309 sw_index = sfc_txq_sw_index(txq); 310 311 SFC_ASSERT(txq->evq != NULL); 312 sa = txq->evq->sa; 313 314 sfc_log_init(sa, "TxQ = %u", sw_index); 315 316 sfc_adapter_lock(sa); 317 318 SFC_ASSERT(sw_index < sa->eth_dev->data->nb_tx_queues); 319 sa->eth_dev->data->tx_queues[sw_index] = NULL; 320 321 sfc_tx_qfini(sa, sw_index); 322 323 sfc_adapter_unlock(sa); 324 } 325 326 static const struct eth_dev_ops sfc_eth_dev_ops = { 327 .dev_configure = sfc_dev_configure, 328 .dev_start = sfc_dev_start, 329 .dev_stop = sfc_dev_stop, 330 .dev_close = sfc_dev_close, 331 .link_update = sfc_dev_link_update, 332 .dev_infos_get = sfc_dev_infos_get, 333 .rx_queue_setup = sfc_rx_queue_setup, 334 .rx_queue_release = sfc_rx_queue_release, 335 .tx_queue_setup = sfc_tx_queue_setup, 336 .tx_queue_release = sfc_tx_queue_release, 337 }; 338 339 static int 340 sfc_eth_dev_init(struct rte_eth_dev *dev) 341 { 342 struct sfc_adapter *sa = dev->data->dev_private; 343 struct rte_pci_device *pci_dev = SFC_DEV_TO_PCI(dev); 344 int rc; 345 const efx_nic_cfg_t *encp; 346 const struct ether_addr *from; 347 348 /* Required for logging */ 349 sa->eth_dev = dev; 350 351 /* Copy PCI device info to the dev->data */ 352 rte_eth_copy_pci_info(dev, pci_dev); 353 354 rc = sfc_kvargs_parse(sa); 355 if (rc != 0) 356 goto fail_kvargs_parse; 357 358 rc = sfc_kvargs_process(sa, SFC_KVARG_DEBUG_INIT, 359 sfc_kvarg_bool_handler, &sa->debug_init); 360 if (rc != 0) 361 goto fail_kvarg_debug_init; 362 363 sfc_log_init(sa, "entry"); 364 365 dev->data->mac_addrs = rte_zmalloc("sfc", ETHER_ADDR_LEN, 0); 366 if (dev->data->mac_addrs == NULL) { 367 rc = ENOMEM; 368 goto fail_mac_addrs; 369 } 370 371 sfc_adapter_lock_init(sa); 372 sfc_adapter_lock(sa); 373 374 sfc_log_init(sa, "attaching"); 375 rc = sfc_attach(sa); 376 if (rc != 0) 377 goto fail_attach; 378 379 encp = efx_nic_cfg_get(sa->nic); 380 381 /* 382 * The arguments are really reverse order in comparison to 383 * Linux kernel. Copy from NIC config to Ethernet device data. 384 */ 385 from = (const struct ether_addr *)(encp->enc_mac_addr); 386 ether_addr_copy(from, &dev->data->mac_addrs[0]); 387 388 dev->dev_ops = &sfc_eth_dev_ops; 389 dev->rx_pkt_burst = &sfc_recv_pkts; 390 391 sfc_adapter_unlock(sa); 392 393 sfc_log_init(sa, "done"); 394 return 0; 395 396 fail_attach: 397 sfc_adapter_unlock(sa); 398 sfc_adapter_lock_fini(sa); 399 rte_free(dev->data->mac_addrs); 400 dev->data->mac_addrs = NULL; 401 402 fail_mac_addrs: 403 fail_kvarg_debug_init: 404 sfc_kvargs_cleanup(sa); 405 406 fail_kvargs_parse: 407 sfc_log_init(sa, "failed %d", rc); 408 SFC_ASSERT(rc > 0); 409 return -rc; 410 } 411 412 static int 413 sfc_eth_dev_uninit(struct rte_eth_dev *dev) 414 { 415 struct sfc_adapter *sa = dev->data->dev_private; 416 417 sfc_log_init(sa, "entry"); 418 419 sfc_adapter_lock(sa); 420 421 sfc_detach(sa); 422 423 rte_free(dev->data->mac_addrs); 424 dev->data->mac_addrs = NULL; 425 426 dev->dev_ops = NULL; 427 dev->rx_pkt_burst = NULL; 428 429 sfc_kvargs_cleanup(sa); 430 431 sfc_adapter_unlock(sa); 432 sfc_adapter_lock_fini(sa); 433 434 sfc_log_init(sa, "done"); 435 436 /* Required for logging, so cleanup last */ 437 sa->eth_dev = NULL; 438 return 0; 439 } 440 441 static const struct rte_pci_id pci_id_sfc_efx_map[] = { 442 { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_FARMINGDALE) }, 443 { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_GREENPORT) }, 444 { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_MEDFORD) }, 445 { .vendor_id = 0 /* sentinel */ } 446 }; 447 448 static struct eth_driver sfc_efx_pmd = { 449 .pci_drv = { 450 .id_table = pci_id_sfc_efx_map, 451 .drv_flags = 452 RTE_PCI_DRV_NEED_MAPPING, 453 .probe = rte_eth_dev_pci_probe, 454 .remove = rte_eth_dev_pci_remove, 455 }, 456 .eth_dev_init = sfc_eth_dev_init, 457 .eth_dev_uninit = sfc_eth_dev_uninit, 458 .dev_private_size = sizeof(struct sfc_adapter), 459 }; 460 461 RTE_PMD_REGISTER_PCI(net_sfc_efx, sfc_efx_pmd.pci_drv); 462 RTE_PMD_REGISTER_PCI_TABLE(net_sfc_efx, pci_id_sfc_efx_map); 463 RTE_PMD_REGISTER_PARAM_STRING(net_sfc_efx, 464 SFC_KVARG_DEBUG_INIT "=" SFC_KVARG_VALUES_BOOL); 465