1// SPDX-License-Identifier: GPL-2.0-only 2/**************************************************************************** 3 * Driver for Solarflare network controllers and boards 4 * Copyright 2005-2006 Fen Systems Ltd. 5 * Copyright 2005-2013 Solarflare Communications Inc. 6 */ 7 8#include <linux/module.h> 9#include <linux/pci.h> 10#include <linux/netdevice.h> 11#include <linux/etherdevice.h> 12#include <linux/delay.h> 13#include <linux/notifier.h> 14#include <linux/ip.h> 15#include <linux/tcp.h> 16#include <linux/in.h> 17#include <linux/ethtool.h> 18#include <linux/topology.h> 19#include <linux/gfp.h> 20#include <linux/aer.h> 21#include <linux/interrupt.h> 22#include "net_driver.h" 23#include <net/gre.h> 24#include <net/udp_tunnel.h> 25#include "efx.h" 26#include "efx_common.h" 27#include "efx_channels.h" 28#include "ef100.h" 29#include "rx_common.h" 30#include "tx_common.h" 31#include "nic.h" 32#include "io.h" 33#include "selftest.h" 34#include "sriov.h" 35 36#include "mcdi_port_common.h" 37#include "mcdi_pcol.h" 38#include "workarounds.h" 39 40/************************************************************************** 41 * 42 * Configurable values 43 * 44 *************************************************************************/ 45 46module_param_named(interrupt_mode, efx_interrupt_mode, uint, 0444); 47MODULE_PARM_DESC(interrupt_mode, 48 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); 49 50module_param(rss_cpus, uint, 0444); 51MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); 52 53/* 54 * Use separate channels for TX and RX events 55 * 56 * Set this to 1 to use separate channels for TX and RX. It allows us 57 * to control interrupt affinity separately for TX and RX. 58 * 59 * This is only used in MSI-X interrupt mode 60 */ 61bool efx_separate_tx_channels; 62module_param(efx_separate_tx_channels, bool, 0444); 63MODULE_PARM_DESC(efx_separate_tx_channels, 64 "Use separate channels for TX and RX"); 65 66/* Initial interrupt moderation settings. They can be modified after 67 * module load with ethtool. 68 * 69 * The default for RX should strike a balance between increasing the 70 * round-trip latency and reducing overhead. 71 */ 72static unsigned int rx_irq_mod_usec = 60; 73 74/* Initial interrupt moderation settings. They can be modified after 75 * module load with ethtool. 76 * 77 * This default is chosen to ensure that a 10G link does not go idle 78 * while a TX queue is stopped after it has become full. A queue is 79 * restarted when it drops below half full. The time this takes (assuming 80 * worst case 3 descriptors per packet and 1024 descriptors) is 81 * 512 / 3 * 1.2 = 205 usec. 82 */ 83static unsigned int tx_irq_mod_usec = 150; 84 85static bool phy_flash_cfg; 86module_param(phy_flash_cfg, bool, 0644); 87MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); 88 89static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 90 NETIF_MSG_LINK | NETIF_MSG_IFDOWN | 91 NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | 92 NETIF_MSG_TX_ERR | NETIF_MSG_HW); 93module_param(debug, uint, 0); 94MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); 95 96/************************************************************************** 97 * 98 * Utility functions and prototypes 99 * 100 *************************************************************************/ 101 102static void efx_remove_port(struct efx_nic *efx); 103static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog); 104static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp); 105static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs, 106 u32 flags); 107 108/************************************************************************** 109 * 110 * Port handling 111 * 112 **************************************************************************/ 113 114static void efx_fini_port(struct efx_nic *efx); 115 116static int efx_probe_port(struct efx_nic *efx) 117{ 118 int rc; 119 120 netif_dbg(efx, probe, efx->net_dev, "create port\n"); 121 122 if (phy_flash_cfg) 123 efx->phy_mode = PHY_MODE_SPECIAL; 124 125 /* Connect up MAC/PHY operations table */ 126 rc = efx->type->probe_port(efx); 127 if (rc) 128 return rc; 129 130 /* Initialise MAC address to permanent address */ 131 ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr); 132 133 return 0; 134} 135 136static int efx_init_port(struct efx_nic *efx) 137{ 138 int rc; 139 140 netif_dbg(efx, drv, efx->net_dev, "init port\n"); 141 142 mutex_lock(&efx->mac_lock); 143 144 efx->port_initialized = true; 145 146 /* Ensure the PHY advertises the correct flow control settings */ 147 rc = efx_mcdi_port_reconfigure(efx); 148 if (rc && rc != -EPERM) 149 goto fail; 150 151 mutex_unlock(&efx->mac_lock); 152 return 0; 153 154fail: 155 mutex_unlock(&efx->mac_lock); 156 return rc; 157} 158 159static void efx_fini_port(struct efx_nic *efx) 160{ 161 netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); 162 163 if (!efx->port_initialized) 164 return; 165 166 efx->port_initialized = false; 167 168 efx->link_state.up = false; 169 efx_link_status_changed(efx); 170} 171 172static void efx_remove_port(struct efx_nic *efx) 173{ 174 netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); 175 176 efx->type->remove_port(efx); 177} 178 179/************************************************************************** 180 * 181 * NIC handling 182 * 183 **************************************************************************/ 184 185static LIST_HEAD(efx_primary_list); 186static LIST_HEAD(efx_unassociated_list); 187 188static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right) 189{ 190 return left->type == right->type && 191 left->vpd_sn && right->vpd_sn && 192 !strcmp(left->vpd_sn, right->vpd_sn); 193} 194 195static void efx_associate(struct efx_nic *efx) 196{ 197 struct efx_nic *other, *next; 198 199 if (efx->primary == efx) { 200 /* Adding primary function; look for secondaries */ 201 202 netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n"); 203 list_add_tail(&efx->node, &efx_primary_list); 204 205 list_for_each_entry_safe(other, next, &efx_unassociated_list, 206 node) { 207 if (efx_same_controller(efx, other)) { 208 list_del(&other->node); 209 netif_dbg(other, probe, other->net_dev, 210 "moving to secondary list of %s %s\n", 211 pci_name(efx->pci_dev), 212 efx->net_dev->name); 213 list_add_tail(&other->node, 214 &efx->secondary_list); 215 other->primary = efx; 216 } 217 } 218 } else { 219 /* Adding secondary function; look for primary */ 220 221 list_for_each_entry(other, &efx_primary_list, node) { 222 if (efx_same_controller(efx, other)) { 223 netif_dbg(efx, probe, efx->net_dev, 224 "adding to secondary list of %s %s\n", 225 pci_name(other->pci_dev), 226 other->net_dev->name); 227 list_add_tail(&efx->node, 228 &other->secondary_list); 229 efx->primary = other; 230 return; 231 } 232 } 233 234 netif_dbg(efx, probe, efx->net_dev, 235 "adding to unassociated list\n"); 236 list_add_tail(&efx->node, &efx_unassociated_list); 237 } 238} 239 240static void efx_dissociate(struct efx_nic *efx) 241{ 242 struct efx_nic *other, *next; 243 244 list_del(&efx->node); 245 efx->primary = NULL; 246 247 list_for_each_entry_safe(other, next, &efx->secondary_list, node) { 248 list_del(&other->node); 249 netif_dbg(other, probe, other->net_dev, 250 "moving to unassociated list\n"); 251 list_add_tail(&other->node, &efx_unassociated_list); 252 other->primary = NULL; 253 } 254} 255 256static int efx_probe_nic(struct efx_nic *efx) 257{ 258 int rc; 259 260 netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); 261 262 /* Carry out hardware-type specific initialisation */ 263 rc = efx->type->probe(efx); 264 if (rc) 265 return rc; 266 267 do { 268 if (!efx->max_channels || !efx->max_tx_channels) { 269 netif_err(efx, drv, efx->net_dev, 270 "Insufficient resources to allocate" 271 " any channels\n"); 272 rc = -ENOSPC; 273 goto fail1; 274 } 275 276 /* Determine the number of channels and queues by trying 277 * to hook in MSI-X interrupts. 278 */ 279 rc = efx_probe_interrupts(efx); 280 if (rc) 281 goto fail1; 282 283 rc = efx_set_channels(efx); 284 if (rc) 285 goto fail1; 286 287 /* dimension_resources can fail with EAGAIN */ 288 rc = efx->type->dimension_resources(efx); 289 if (rc != 0 && rc != -EAGAIN) 290 goto fail2; 291 292 if (rc == -EAGAIN) 293 /* try again with new max_channels */ 294 efx_remove_interrupts(efx); 295 296 } while (rc == -EAGAIN); 297 298 if (efx->n_channels > 1) 299 netdev_rss_key_fill(efx->rss_context.rx_hash_key, 300 sizeof(efx->rss_context.rx_hash_key)); 301 efx_set_default_rx_indir_table(efx, &efx->rss_context); 302 303 /* Initialise the interrupt moderation settings */ 304 efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000); 305 efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, 306 true); 307 308 return 0; 309 310fail2: 311 efx_remove_interrupts(efx); 312fail1: 313 efx->type->remove(efx); 314 return rc; 315} 316 317static void efx_remove_nic(struct efx_nic *efx) 318{ 319 netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); 320 321 efx_remove_interrupts(efx); 322 efx->type->remove(efx); 323} 324 325/************************************************************************** 326 * 327 * NIC startup/shutdown 328 * 329 *************************************************************************/ 330 331static int efx_probe_all(struct efx_nic *efx) 332{ 333 int rc; 334 335 rc = efx_probe_nic(efx); 336 if (rc) { 337 netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); 338 goto fail1; 339 } 340 341 rc = efx_probe_port(efx); 342 if (rc) { 343 netif_err(efx, probe, efx->net_dev, "failed to create port\n"); 344 goto fail2; 345 } 346 347 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); 348 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { 349 rc = -EINVAL; 350 goto fail3; 351 } 352 353#ifdef CONFIG_SFC_SRIOV 354 rc = efx->type->vswitching_probe(efx); 355 if (rc) /* not fatal; the PF will still work fine */ 356 netif_warn(efx, probe, efx->net_dev, 357 "failed to setup vswitching rc=%d;" 358 " VFs may not function\n", rc); 359#endif 360 361 rc = efx_probe_filters(efx); 362 if (rc) { 363 netif_err(efx, probe, efx->net_dev, 364 "failed to create filter tables\n"); 365 goto fail4; 366 } 367 368 rc = efx_probe_channels(efx); 369 if (rc) 370 goto fail5; 371 372 efx->state = STATE_NET_DOWN; 373 374 return 0; 375 376 fail5: 377 efx_remove_filters(efx); 378 fail4: 379#ifdef CONFIG_SFC_SRIOV 380 efx->type->vswitching_remove(efx); 381#endif 382 fail3: 383 efx_remove_port(efx); 384 fail2: 385 efx_remove_nic(efx); 386 fail1: 387 return rc; 388} 389 390static void efx_remove_all(struct efx_nic *efx) 391{ 392 rtnl_lock(); 393 efx_xdp_setup_prog(efx, NULL); 394 rtnl_unlock(); 395 396 efx_remove_channels(efx); 397 efx_remove_filters(efx); 398#ifdef CONFIG_SFC_SRIOV 399 efx->type->vswitching_remove(efx); 400#endif 401 efx_remove_port(efx); 402 efx_remove_nic(efx); 403} 404 405/************************************************************************** 406 * 407 * Interrupt moderation 408 * 409 **************************************************************************/ 410unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs) 411{ 412 if (usecs == 0) 413 return 0; 414 if (usecs * 1000 < efx->timer_quantum_ns) 415 return 1; /* never round down to 0 */ 416 return usecs * 1000 / efx->timer_quantum_ns; 417} 418 419unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks) 420{ 421 /* We must round up when converting ticks to microseconds 422 * because we round down when converting the other way. 423 */ 424 return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000); 425} 426 427/* Set interrupt moderation parameters */ 428int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, 429 unsigned int rx_usecs, bool rx_adaptive, 430 bool rx_may_override_tx) 431{ 432 struct efx_channel *channel; 433 unsigned int timer_max_us; 434 435 EFX_ASSERT_RESET_SERIALISED(efx); 436 437 timer_max_us = efx->timer_max_ns / 1000; 438 439 if (tx_usecs > timer_max_us || rx_usecs > timer_max_us) 440 return -EINVAL; 441 442 if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 && 443 !rx_may_override_tx) { 444 netif_err(efx, drv, efx->net_dev, "Channels are shared. " 445 "RX and TX IRQ moderation must be equal\n"); 446 return -EINVAL; 447 } 448 449 efx->irq_rx_adaptive = rx_adaptive; 450 efx->irq_rx_moderation_us = rx_usecs; 451 efx_for_each_channel(channel, efx) { 452 if (efx_channel_has_rx_queue(channel)) 453 channel->irq_moderation_us = rx_usecs; 454 else if (efx_channel_has_tx_queues(channel)) 455 channel->irq_moderation_us = tx_usecs; 456 else if (efx_channel_is_xdp_tx(channel)) 457 channel->irq_moderation_us = tx_usecs; 458 } 459 460 return 0; 461} 462 463void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, 464 unsigned int *rx_usecs, bool *rx_adaptive) 465{ 466 *rx_adaptive = efx->irq_rx_adaptive; 467 *rx_usecs = efx->irq_rx_moderation_us; 468 469 /* If channels are shared between RX and TX, so is IRQ 470 * moderation. Otherwise, IRQ moderation is the same for all 471 * TX channels and is not adaptive. 472 */ 473 if (efx->tx_channel_offset == 0) { 474 *tx_usecs = *rx_usecs; 475 } else { 476 struct efx_channel *tx_channel; 477 478 tx_channel = efx->channel[efx->tx_channel_offset]; 479 *tx_usecs = tx_channel->irq_moderation_us; 480 } 481} 482 483/************************************************************************** 484 * 485 * ioctls 486 * 487 *************************************************************************/ 488 489/* Net device ioctl 490 * Context: process, rtnl_lock() held. 491 */ 492static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) 493{ 494 struct efx_nic *efx = netdev_priv(net_dev); 495 struct mii_ioctl_data *data = if_mii(ifr); 496 497 if (cmd == SIOCSHWTSTAMP) 498 return efx_ptp_set_ts_config(efx, ifr); 499 if (cmd == SIOCGHWTSTAMP) 500 return efx_ptp_get_ts_config(efx, ifr); 501 502 /* Convert phy_id from older PRTAD/DEVAD format */ 503 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && 504 (data->phy_id & 0xfc00) == 0x0400) 505 data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; 506 507 return mdio_mii_ioctl(&efx->mdio, data, cmd); 508} 509 510/************************************************************************** 511 * 512 * Kernel net device interface 513 * 514 *************************************************************************/ 515 516/* Context: process, rtnl_lock() held. */ 517int efx_net_open(struct net_device *net_dev) 518{ 519 struct efx_nic *efx = netdev_priv(net_dev); 520 int rc; 521 522 netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", 523 raw_smp_processor_id()); 524 525 rc = efx_check_disabled(efx); 526 if (rc) 527 return rc; 528 if (efx->phy_mode & PHY_MODE_SPECIAL) 529 return -EBUSY; 530 if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) 531 return -EIO; 532 533 /* Notify the kernel of the link state polled during driver load, 534 * before the monitor starts running */ 535 efx_link_status_changed(efx); 536 537 efx_start_all(efx); 538 if (efx->state == STATE_DISABLED || efx->reset_pending) 539 netif_device_detach(efx->net_dev); 540 else 541 efx->state = STATE_NET_UP; 542 543 return 0; 544} 545 546/* Context: process, rtnl_lock() held. 547 * Note that the kernel will ignore our return code; this method 548 * should really be a void. 549 */ 550int efx_net_stop(struct net_device *net_dev) 551{ 552 struct efx_nic *efx = netdev_priv(net_dev); 553 554 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", 555 raw_smp_processor_id()); 556 557 /* Stop the device and flush all the channels */ 558 efx_stop_all(efx); 559 560 return 0; 561} 562 563static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid) 564{ 565 struct efx_nic *efx = netdev_priv(net_dev); 566 567 if (efx->type->vlan_rx_add_vid) 568 return efx->type->vlan_rx_add_vid(efx, proto, vid); 569 else 570 return -EOPNOTSUPP; 571} 572 573static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid) 574{ 575 struct efx_nic *efx = netdev_priv(net_dev); 576 577 if (efx->type->vlan_rx_kill_vid) 578 return efx->type->vlan_rx_kill_vid(efx, proto, vid); 579 else 580 return -EOPNOTSUPP; 581} 582 583static const struct net_device_ops efx_netdev_ops = { 584 .ndo_open = efx_net_open, 585 .ndo_stop = efx_net_stop, 586 .ndo_get_stats64 = efx_net_stats, 587 .ndo_tx_timeout = efx_watchdog, 588 .ndo_start_xmit = efx_hard_start_xmit, 589 .ndo_validate_addr = eth_validate_addr, 590 .ndo_do_ioctl = efx_ioctl, 591 .ndo_change_mtu = efx_change_mtu, 592 .ndo_set_mac_address = efx_set_mac_address, 593 .ndo_set_rx_mode = efx_set_rx_mode, 594 .ndo_set_features = efx_set_features, 595 .ndo_features_check = efx_features_check, 596 .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid, 597 .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid, 598#ifdef CONFIG_SFC_SRIOV 599 .ndo_set_vf_mac = efx_sriov_set_vf_mac, 600 .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, 601 .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, 602 .ndo_get_vf_config = efx_sriov_get_vf_config, 603 .ndo_set_vf_link_state = efx_sriov_set_vf_link_state, 604#endif 605 .ndo_get_phys_port_id = efx_get_phys_port_id, 606 .ndo_get_phys_port_name = efx_get_phys_port_name, 607 .ndo_setup_tc = efx_setup_tc, 608#ifdef CONFIG_RFS_ACCEL 609 .ndo_rx_flow_steer = efx_filter_rfs, 610#endif 611 .ndo_udp_tunnel_add = udp_tunnel_nic_add_port, 612 .ndo_udp_tunnel_del = udp_tunnel_nic_del_port, 613 .ndo_xdp_xmit = efx_xdp_xmit, 614 .ndo_bpf = efx_xdp 615}; 616 617static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog) 618{ 619 struct bpf_prog *old_prog; 620 621 if (efx->xdp_rxq_info_failed) { 622 netif_err(efx, drv, efx->net_dev, 623 "Unable to bind XDP program due to previous failure of rxq_info\n"); 624 return -EINVAL; 625 } 626 627 if (prog && efx->net_dev->mtu > efx_xdp_max_mtu(efx)) { 628 netif_err(efx, drv, efx->net_dev, 629 "Unable to configure XDP with MTU of %d (max: %d)\n", 630 efx->net_dev->mtu, efx_xdp_max_mtu(efx)); 631 return -EINVAL; 632 } 633 634 old_prog = rtnl_dereference(efx->xdp_prog); 635 rcu_assign_pointer(efx->xdp_prog, prog); 636 /* Release the reference that was originally passed by the caller. */ 637 if (old_prog) 638 bpf_prog_put(old_prog); 639 640 return 0; 641} 642 643/* Context: process, rtnl_lock() held. */ 644static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp) 645{ 646 struct efx_nic *efx = netdev_priv(dev); 647 648 switch (xdp->command) { 649 case XDP_SETUP_PROG: 650 return efx_xdp_setup_prog(efx, xdp->prog); 651 default: 652 return -EINVAL; 653 } 654} 655 656static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs, 657 u32 flags) 658{ 659 struct efx_nic *efx = netdev_priv(dev); 660 661 if (!netif_running(dev)) 662 return -EINVAL; 663 664 return efx_xdp_tx_buffers(efx, n, xdpfs, flags & XDP_XMIT_FLUSH); 665} 666 667static void efx_update_name(struct efx_nic *efx) 668{ 669 strcpy(efx->name, efx->net_dev->name); 670 efx_mtd_rename(efx); 671 efx_set_channel_names(efx); 672} 673 674static int efx_netdev_event(struct notifier_block *this, 675 unsigned long event, void *ptr) 676{ 677 struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); 678 679 if ((net_dev->netdev_ops == &efx_netdev_ops) && 680 event == NETDEV_CHANGENAME) 681 efx_update_name(netdev_priv(net_dev)); 682 683 return NOTIFY_DONE; 684} 685 686static struct notifier_block efx_netdev_notifier = { 687 .notifier_call = efx_netdev_event, 688}; 689 690static ssize_t 691show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) 692{ 693 struct efx_nic *efx = dev_get_drvdata(dev); 694 return sprintf(buf, "%d\n", efx->phy_type); 695} 696static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL); 697 698static int efx_register_netdev(struct efx_nic *efx) 699{ 700 struct net_device *net_dev = efx->net_dev; 701 struct efx_channel *channel; 702 int rc; 703 704 net_dev->watchdog_timeo = 5 * HZ; 705 net_dev->irq = efx->pci_dev->irq; 706 net_dev->netdev_ops = &efx_netdev_ops; 707 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) 708 net_dev->priv_flags |= IFF_UNICAST_FLT; 709 net_dev->ethtool_ops = &efx_ethtool_ops; 710 net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; 711 net_dev->min_mtu = EFX_MIN_MTU; 712 net_dev->max_mtu = EFX_MAX_MTU; 713 714 rtnl_lock(); 715 716 /* Enable resets to be scheduled and check whether any were 717 * already requested. If so, the NIC is probably hosed so we 718 * abort. 719 */ 720 if (efx->reset_pending) { 721 netif_err(efx, probe, efx->net_dev, 722 "aborting probe due to scheduled reset\n"); 723 rc = -EIO; 724 goto fail_locked; 725 } 726 727 rc = dev_alloc_name(net_dev, net_dev->name); 728 if (rc < 0) 729 goto fail_locked; 730 efx_update_name(efx); 731 732 /* Always start with carrier off; PHY events will detect the link */ 733 netif_carrier_off(net_dev); 734 735 rc = register_netdevice(net_dev); 736 if (rc) 737 goto fail_locked; 738 739 efx_for_each_channel(channel, efx) { 740 struct efx_tx_queue *tx_queue; 741 efx_for_each_channel_tx_queue(tx_queue, channel) 742 efx_init_tx_queue_core_txq(tx_queue); 743 } 744 745 efx_associate(efx); 746 747 efx->state = STATE_NET_DOWN; 748 749 rtnl_unlock(); 750 751 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); 752 if (rc) { 753 netif_err(efx, drv, efx->net_dev, 754 "failed to init net dev attributes\n"); 755 goto fail_registered; 756 } 757 758 efx_init_mcdi_logging(efx); 759 760 return 0; 761 762fail_registered: 763 rtnl_lock(); 764 efx_dissociate(efx); 765 unregister_netdevice(net_dev); 766fail_locked: 767 efx->state = STATE_UNINIT; 768 rtnl_unlock(); 769 netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); 770 return rc; 771} 772 773static void efx_unregister_netdev(struct efx_nic *efx) 774{ 775 if (!efx->net_dev) 776 return; 777 778 BUG_ON(netdev_priv(efx->net_dev) != efx); 779 780 if (efx_dev_registered(efx)) { 781 strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); 782 efx_fini_mcdi_logging(efx); 783 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); 784 unregister_netdev(efx->net_dev); 785 } 786} 787 788/************************************************************************** 789 * 790 * List of NICs we support 791 * 792 **************************************************************************/ 793 794/* PCI device ID table */ 795static const struct pci_device_id efx_pci_table[] = { 796 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ 797 .driver_data = (unsigned long) &siena_a0_nic_type}, 798 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ 799 .driver_data = (unsigned long) &siena_a0_nic_type}, 800 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */ 801 .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 802 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */ 803 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 804 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */ 805 .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 806 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */ 807 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 808 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */ 809 .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 810 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */ 811 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 812 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0b03), /* SFC9250 PF */ 813 .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, 814 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1b03), /* SFC9250 VF */ 815 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, 816 {0} /* end of list */ 817}; 818 819/************************************************************************** 820 * 821 * Data housekeeping 822 * 823 **************************************************************************/ 824 825void efx_update_sw_stats(struct efx_nic *efx, u64 *stats) 826{ 827 u64 n_rx_nodesc_trunc = 0; 828 struct efx_channel *channel; 829 830 efx_for_each_channel(channel, efx) 831 n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc; 832 stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc; 833 stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops); 834} 835 836/************************************************************************** 837 * 838 * PCI interface 839 * 840 **************************************************************************/ 841 842/* Main body of final NIC shutdown code 843 * This is called only at module unload (or hotplug removal). 844 */ 845static void efx_pci_remove_main(struct efx_nic *efx) 846{ 847 /* Flush reset_work. It can no longer be scheduled since we 848 * are not READY. 849 */ 850 WARN_ON(efx_net_active(efx->state)); 851 efx_flush_reset_workqueue(efx); 852 853 efx_disable_interrupts(efx); 854 efx_clear_interrupt_affinity(efx); 855 efx_nic_fini_interrupt(efx); 856 efx_fini_port(efx); 857 efx->type->fini(efx); 858 efx_fini_napi(efx); 859 efx_remove_all(efx); 860} 861 862/* Final NIC shutdown 863 * This is called only at module unload (or hotplug removal). A PF can call 864 * this on its VFs to ensure they are unbound first. 865 */ 866static void efx_pci_remove(struct pci_dev *pci_dev) 867{ 868 struct efx_nic *efx; 869 870 efx = pci_get_drvdata(pci_dev); 871 if (!efx) 872 return; 873 874 /* Mark the NIC as fini, then stop the interface */ 875 rtnl_lock(); 876 efx_dissociate(efx); 877 dev_close(efx->net_dev); 878 efx_disable_interrupts(efx); 879 efx->state = STATE_UNINIT; 880 rtnl_unlock(); 881 882 if (efx->type->sriov_fini) 883 efx->type->sriov_fini(efx); 884 885 efx_unregister_netdev(efx); 886 887 efx_mtd_remove(efx); 888 889 efx_pci_remove_main(efx); 890 891 efx_fini_io(efx); 892 netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); 893 894 efx_fini_struct(efx); 895 free_netdev(efx->net_dev); 896 897 pci_disable_pcie_error_reporting(pci_dev); 898}; 899 900/* NIC VPD information 901 * Called during probe to display the part number of the 902 * installed NIC. VPD is potentially very large but this should 903 * always appear within the first 512 bytes. 904 */ 905#define SFC_VPD_LEN 512 906static void efx_probe_vpd_strings(struct efx_nic *efx) 907{ 908 struct pci_dev *dev = efx->pci_dev; 909 char vpd_data[SFC_VPD_LEN]; 910 ssize_t vpd_size; 911 int ro_start, ro_size, i, j; 912 913 /* Get the vpd data from the device */ 914 vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); 915 if (vpd_size <= 0) { 916 netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); 917 return; 918 } 919 920 /* Get the Read only section */ 921 ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); 922 if (ro_start < 0) { 923 netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); 924 return; 925 } 926 927 ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]); 928 j = ro_size; 929 i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 930 if (i + j > vpd_size) 931 j = vpd_size - i; 932 933 /* Get the Part number */ 934 i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); 935 if (i < 0) { 936 netif_err(efx, drv, efx->net_dev, "Part number not found\n"); 937 return; 938 } 939 940 j = pci_vpd_info_field_size(&vpd_data[i]); 941 i += PCI_VPD_INFO_FLD_HDR_SIZE; 942 if (i + j > vpd_size) { 943 netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); 944 return; 945 } 946 947 netif_info(efx, drv, efx->net_dev, 948 "Part Number : %.*s\n", j, &vpd_data[i]); 949 950 i = ro_start + PCI_VPD_LRDT_TAG_SIZE; 951 j = ro_size; 952 i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN"); 953 if (i < 0) { 954 netif_err(efx, drv, efx->net_dev, "Serial number not found\n"); 955 return; 956 } 957 958 j = pci_vpd_info_field_size(&vpd_data[i]); 959 i += PCI_VPD_INFO_FLD_HDR_SIZE; 960 if (i + j > vpd_size) { 961 netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n"); 962 return; 963 } 964 965 efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL); 966 if (!efx->vpd_sn) 967 return; 968 969 snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]); 970} 971 972 973/* Main body of NIC initialisation 974 * This is called at module load (or hotplug insertion, theoretically). 975 */ 976static int efx_pci_probe_main(struct efx_nic *efx) 977{ 978 int rc; 979 980 /* Do start-of-day initialisation */ 981 rc = efx_probe_all(efx); 982 if (rc) 983 goto fail1; 984 985 efx_init_napi(efx); 986 987 down_write(&efx->filter_sem); 988 rc = efx->type->init(efx); 989 up_write(&efx->filter_sem); 990 if (rc) { 991 netif_err(efx, probe, efx->net_dev, 992 "failed to initialise NIC\n"); 993 goto fail3; 994 } 995 996 rc = efx_init_port(efx); 997 if (rc) { 998 netif_err(efx, probe, efx->net_dev, 999 "failed to initialise port\n"); 1000 goto fail4; 1001 } 1002 1003 rc = efx_nic_init_interrupt(efx); 1004 if (rc) 1005 goto fail5; 1006 1007 efx_set_interrupt_affinity(efx); 1008 rc = efx_enable_interrupts(efx); 1009 if (rc) 1010 goto fail6; 1011 1012 return 0; 1013 1014 fail6: 1015 efx_clear_interrupt_affinity(efx); 1016 efx_nic_fini_interrupt(efx); 1017 fail5: 1018 efx_fini_port(efx); 1019 fail4: 1020 efx->type->fini(efx); 1021 fail3: 1022 efx_fini_napi(efx); 1023 efx_remove_all(efx); 1024 fail1: 1025 return rc; 1026} 1027 1028static int efx_pci_probe_post_io(struct efx_nic *efx) 1029{ 1030 struct net_device *net_dev = efx->net_dev; 1031 int rc = efx_pci_probe_main(efx); 1032 1033 if (rc) 1034 return rc; 1035 1036 if (efx->type->sriov_init) { 1037 rc = efx->type->sriov_init(efx); 1038 if (rc) 1039 netif_err(efx, probe, efx->net_dev, 1040 "SR-IOV can't be enabled rc %d\n", rc); 1041 } 1042 1043 /* Determine netdevice features */ 1044 net_dev->features |= efx->type->offload_features; 1045 1046 /* Add TSO features */ 1047 if (efx->type->tso_versions && efx->type->tso_versions(efx)) 1048 net_dev->features |= NETIF_F_TSO | NETIF_F_TSO6; 1049 1050 /* Mask for features that also apply to VLAN devices */ 1051 net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG | 1052 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | 1053 NETIF_F_RXCSUM); 1054 1055 /* Determine user configurable features */ 1056 net_dev->hw_features |= net_dev->features & ~efx->fixed_features; 1057 1058 /* Disable receiving frames with bad FCS, by default. */ 1059 net_dev->features &= ~NETIF_F_RXALL; 1060 1061 /* Disable VLAN filtering by default. It may be enforced if 1062 * the feature is fixed (i.e. VLAN filters are required to 1063 * receive VLAN tagged packets due to vPort restrictions). 1064 */ 1065 net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1066 net_dev->features |= efx->fixed_features; 1067 1068 rc = efx_register_netdev(efx); 1069 if (!rc) 1070 return 0; 1071 1072 efx_pci_remove_main(efx); 1073 return rc; 1074} 1075 1076/* NIC initialisation 1077 * 1078 * This is called at module load (or hotplug insertion, 1079 * theoretically). It sets up PCI mappings, resets the NIC, 1080 * sets up and registers the network devices with the kernel and hooks 1081 * the interrupt service routine. It does not prepare the device for 1082 * transmission; this is left to the first time one of the network 1083 * interfaces is brought up (i.e. efx_net_open). 1084 */ 1085static int efx_pci_probe(struct pci_dev *pci_dev, 1086 const struct pci_device_id *entry) 1087{ 1088 struct net_device *net_dev; 1089 struct efx_nic *efx; 1090 int rc; 1091 1092 /* Allocate and initialise a struct net_device and struct efx_nic */ 1093 net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, 1094 EFX_MAX_RX_QUEUES); 1095 if (!net_dev) 1096 return -ENOMEM; 1097 efx = netdev_priv(net_dev); 1098 efx->type = (const struct efx_nic_type *) entry->driver_data; 1099 efx->fixed_features |= NETIF_F_HIGHDMA; 1100 1101 pci_set_drvdata(pci_dev, efx); 1102 SET_NETDEV_DEV(net_dev, &pci_dev->dev); 1103 rc = efx_init_struct(efx, pci_dev, net_dev); 1104 if (rc) 1105 goto fail1; 1106 1107 netif_info(efx, probe, efx->net_dev, 1108 "Solarflare NIC detected\n"); 1109 1110 if (!efx->type->is_vf) 1111 efx_probe_vpd_strings(efx); 1112 1113 /* Set up basic I/O (BAR mappings etc) */ 1114 rc = efx_init_io(efx, efx->type->mem_bar(efx), efx->type->max_dma_mask, 1115 efx->type->mem_map_size(efx)); 1116 if (rc) 1117 goto fail2; 1118 1119 rc = efx_pci_probe_post_io(efx); 1120 if (rc) { 1121 /* On failure, retry once immediately. 1122 * If we aborted probe due to a scheduled reset, dismiss it. 1123 */ 1124 efx->reset_pending = 0; 1125 rc = efx_pci_probe_post_io(efx); 1126 if (rc) { 1127 /* On another failure, retry once more 1128 * after a 50-305ms delay. 1129 */ 1130 unsigned char r; 1131 1132 get_random_bytes(&r, 1); 1133 msleep((unsigned int)r + 50); 1134 efx->reset_pending = 0; 1135 rc = efx_pci_probe_post_io(efx); 1136 } 1137 } 1138 if (rc) 1139 goto fail3; 1140 1141 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); 1142 1143 /* Try to create MTDs, but allow this to fail */ 1144 rtnl_lock(); 1145 rc = efx_mtd_probe(efx); 1146 rtnl_unlock(); 1147 if (rc && rc != -EPERM) 1148 netif_warn(efx, probe, efx->net_dev, 1149 "failed to create MTDs (%d)\n", rc); 1150 1151 (void)pci_enable_pcie_error_reporting(pci_dev); 1152 1153 if (efx->type->udp_tnl_push_ports) 1154 efx->type->udp_tnl_push_ports(efx); 1155 1156 return 0; 1157 1158 fail3: 1159 efx_fini_io(efx); 1160 fail2: 1161 efx_fini_struct(efx); 1162 fail1: 1163 WARN_ON(rc > 0); 1164 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); 1165 free_netdev(net_dev); 1166 return rc; 1167} 1168 1169/* efx_pci_sriov_configure returns the actual number of Virtual Functions 1170 * enabled on success 1171 */ 1172#ifdef CONFIG_SFC_SRIOV 1173static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs) 1174{ 1175 int rc; 1176 struct efx_nic *efx = pci_get_drvdata(dev); 1177 1178 if (efx->type->sriov_configure) { 1179 rc = efx->type->sriov_configure(efx, num_vfs); 1180 if (rc) 1181 return rc; 1182 else 1183 return num_vfs; 1184 } else 1185 return -EOPNOTSUPP; 1186} 1187#endif 1188 1189static int efx_pm_freeze(struct device *dev) 1190{ 1191 struct efx_nic *efx = dev_get_drvdata(dev); 1192 1193 rtnl_lock(); 1194 1195 if (efx_net_active(efx->state)) { 1196 efx_device_detach_sync(efx); 1197 1198 efx_stop_all(efx); 1199 efx_disable_interrupts(efx); 1200 1201 efx->state = efx_freeze(efx->state); 1202 } 1203 1204 rtnl_unlock(); 1205 1206 return 0; 1207} 1208 1209static int efx_pm_thaw(struct device *dev) 1210{ 1211 int rc; 1212 struct efx_nic *efx = dev_get_drvdata(dev); 1213 1214 rtnl_lock(); 1215 1216 if (efx_frozen(efx->state)) { 1217 rc = efx_enable_interrupts(efx); 1218 if (rc) 1219 goto fail; 1220 1221 mutex_lock(&efx->mac_lock); 1222 efx_mcdi_port_reconfigure(efx); 1223 mutex_unlock(&efx->mac_lock); 1224 1225 efx_start_all(efx); 1226 1227 efx_device_attach_if_not_resetting(efx); 1228 1229 efx->state = efx_thaw(efx->state); 1230 1231 efx->type->resume_wol(efx); 1232 } 1233 1234 rtnl_unlock(); 1235 1236 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ 1237 efx_queue_reset_work(efx); 1238 1239 return 0; 1240 1241fail: 1242 rtnl_unlock(); 1243 1244 return rc; 1245} 1246 1247static int efx_pm_poweroff(struct device *dev) 1248{ 1249 struct pci_dev *pci_dev = to_pci_dev(dev); 1250 struct efx_nic *efx = pci_get_drvdata(pci_dev); 1251 1252 efx->type->fini(efx); 1253 1254 efx->reset_pending = 0; 1255 1256 pci_save_state(pci_dev); 1257 return pci_set_power_state(pci_dev, PCI_D3hot); 1258} 1259 1260/* Used for both resume and restore */ 1261static int efx_pm_resume(struct device *dev) 1262{ 1263 struct pci_dev *pci_dev = to_pci_dev(dev); 1264 struct efx_nic *efx = pci_get_drvdata(pci_dev); 1265 int rc; 1266 1267 rc = pci_set_power_state(pci_dev, PCI_D0); 1268 if (rc) 1269 return rc; 1270 pci_restore_state(pci_dev); 1271 rc = pci_enable_device(pci_dev); 1272 if (rc) 1273 return rc; 1274 pci_set_master(efx->pci_dev); 1275 rc = efx->type->reset(efx, RESET_TYPE_ALL); 1276 if (rc) 1277 return rc; 1278 down_write(&efx->filter_sem); 1279 rc = efx->type->init(efx); 1280 up_write(&efx->filter_sem); 1281 if (rc) 1282 return rc; 1283 rc = efx_pm_thaw(dev); 1284 return rc; 1285} 1286 1287static int efx_pm_suspend(struct device *dev) 1288{ 1289 int rc; 1290 1291 efx_pm_freeze(dev); 1292 rc = efx_pm_poweroff(dev); 1293 if (rc) 1294 efx_pm_resume(dev); 1295 return rc; 1296} 1297 1298static const struct dev_pm_ops efx_pm_ops = { 1299 .suspend = efx_pm_suspend, 1300 .resume = efx_pm_resume, 1301 .freeze = efx_pm_freeze, 1302 .thaw = efx_pm_thaw, 1303 .poweroff = efx_pm_poweroff, 1304 .restore = efx_pm_resume, 1305}; 1306 1307static struct pci_driver efx_pci_driver = { 1308 .name = KBUILD_MODNAME, 1309 .id_table = efx_pci_table, 1310 .probe = efx_pci_probe, 1311 .remove = efx_pci_remove, 1312 .driver.pm = &efx_pm_ops, 1313 .err_handler = &efx_err_handlers, 1314#ifdef CONFIG_SFC_SRIOV 1315 .sriov_configure = efx_pci_sriov_configure, 1316#endif 1317}; 1318 1319/************************************************************************** 1320 * 1321 * Kernel module interface 1322 * 1323 *************************************************************************/ 1324 1325static int __init efx_init_module(void) 1326{ 1327 int rc; 1328 1329 printk(KERN_INFO "Solarflare NET driver\n"); 1330 1331 rc = register_netdevice_notifier(&efx_netdev_notifier); 1332 if (rc) 1333 goto err_notifier; 1334 1335#ifdef CONFIG_SFC_SRIOV 1336 rc = efx_init_sriov(); 1337 if (rc) 1338 goto err_sriov; 1339#endif 1340 1341 rc = efx_create_reset_workqueue(); 1342 if (rc) 1343 goto err_reset; 1344 1345 rc = pci_register_driver(&efx_pci_driver); 1346 if (rc < 0) 1347 goto err_pci; 1348 1349 rc = pci_register_driver(&ef100_pci_driver); 1350 if (rc < 0) 1351 goto err_pci_ef100; 1352 1353 return 0; 1354 1355 err_pci_ef100: 1356 pci_unregister_driver(&efx_pci_driver); 1357 err_pci: 1358 efx_destroy_reset_workqueue(); 1359 err_reset: 1360#ifdef CONFIG_SFC_SRIOV 1361 efx_fini_sriov(); 1362 err_sriov: 1363#endif 1364 unregister_netdevice_notifier(&efx_netdev_notifier); 1365 err_notifier: 1366 return rc; 1367} 1368 1369static void __exit efx_exit_module(void) 1370{ 1371 printk(KERN_INFO "Solarflare NET driver unloading\n"); 1372 1373 pci_unregister_driver(&ef100_pci_driver); 1374 pci_unregister_driver(&efx_pci_driver); 1375 efx_destroy_reset_workqueue(); 1376#ifdef CONFIG_SFC_SRIOV 1377 efx_fini_sriov(); 1378#endif 1379 unregister_netdevice_notifier(&efx_netdev_notifier); 1380 1381} 1382 1383module_init(efx_init_module); 1384module_exit(efx_exit_module); 1385 1386MODULE_AUTHOR("Solarflare Communications and " 1387 "Michael Brown <mbrown@fensystems.co.uk>"); 1388MODULE_DESCRIPTION("Solarflare network driver"); 1389MODULE_LICENSE("GPL"); 1390MODULE_DEVICE_TABLE(pci, efx_pci_table); 1391