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1// SPDX-License-Identifier: GPL-2.0-only2/****************************************************************************3 * Driver for Solarflare network controllers and boards4 * Copyright 2005-2006 Fen Systems Ltd.5 * Copyright 2005-2013 Solarflare Communications Inc.6 */7 8#include <linux/filter.h>9#include <linux/module.h>10#include <linux/pci.h>11#include <linux/netdevice.h>12#include <linux/etherdevice.h>13#include <linux/delay.h>14#include <linux/notifier.h>15#include <linux/ip.h>16#include <linux/tcp.h>17#include <linux/in.h>18#include <linux/ethtool.h>19#include <linux/topology.h>20#include <linux/gfp.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#include "efx_devlink.h"36 37#include "mcdi_port_common.h"38#include "mcdi_pcol.h"39#include "workarounds.h"40 41/**************************************************************************42 *43 * Configurable values44 *45 *************************************************************************/46 47module_param_named(interrupt_mode, efx_interrupt_mode, uint, 0444);48MODULE_PARM_DESC(interrupt_mode,49 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");50 51module_param(rss_cpus, uint, 0444);52MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling");53 54/*55 * Use separate channels for TX and RX events56 *57 * Set this to 1 to use separate channels for TX and RX. It allows us58 * to control interrupt affinity separately for TX and RX.59 *60 * This is only used in MSI-X interrupt mode61 */62bool efx_separate_tx_channels;63module_param(efx_separate_tx_channels, bool, 0444);64MODULE_PARM_DESC(efx_separate_tx_channels,65 "Use separate channels for TX and RX");66 67/* Initial interrupt moderation settings. They can be modified after68 * module load with ethtool.69 *70 * The default for RX should strike a balance between increasing the71 * round-trip latency and reducing overhead.72 */73static unsigned int rx_irq_mod_usec = 60;74 75/* Initial interrupt moderation settings. They can be modified after76 * module load with ethtool.77 *78 * This default is chosen to ensure that a 10G link does not go idle79 * while a TX queue is stopped after it has become full. A queue is80 * restarted when it drops below half full. The time this takes (assuming81 * worst case 3 descriptors per packet and 1024 descriptors) is82 * 512 / 3 * 1.2 = 205 usec.83 */84static unsigned int tx_irq_mod_usec = 150;85 86static bool phy_flash_cfg;87module_param(phy_flash_cfg, bool, 0644);88MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially");89 90static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE |91 NETIF_MSG_LINK | NETIF_MSG_IFDOWN |92 NETIF_MSG_IFUP | NETIF_MSG_RX_ERR |93 NETIF_MSG_TX_ERR | NETIF_MSG_HW);94module_param(debug, uint, 0);95MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value");96 97/**************************************************************************98 *99 * Utility functions and prototypes100 *101 *************************************************************************/102 103static void efx_remove_port(struct efx_nic *efx);104static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog);105static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp);106static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,107 u32 flags);108 109/**************************************************************************110 *111 * Port handling112 *113 **************************************************************************/114 115static void efx_fini_port(struct efx_nic *efx);116 117static int efx_probe_port(struct efx_nic *efx)118{119 int rc;120 121 netif_dbg(efx, probe, efx->net_dev, "create port\n");122 123 if (phy_flash_cfg)124 efx->phy_mode = PHY_MODE_SPECIAL;125 126 /* Connect up MAC/PHY operations table */127 rc = efx->type->probe_port(efx);128 if (rc)129 return rc;130 131 /* Initialise MAC address to permanent address */132 eth_hw_addr_set(efx->net_dev, efx->net_dev->perm_addr);133 134 return 0;135}136 137static int efx_init_port(struct efx_nic *efx)138{139 int rc;140 141 netif_dbg(efx, drv, efx->net_dev, "init port\n");142 143 mutex_lock(&efx->mac_lock);144 145 efx->port_initialized = true;146 147 /* Ensure the PHY advertises the correct flow control settings */148 rc = efx_mcdi_port_reconfigure(efx);149 if (rc && rc != -EPERM)150 goto fail;151 152 mutex_unlock(&efx->mac_lock);153 return 0;154 155fail:156 mutex_unlock(&efx->mac_lock);157 return rc;158}159 160static void efx_fini_port(struct efx_nic *efx)161{162 netif_dbg(efx, drv, efx->net_dev, "shut down port\n");163 164 if (!efx->port_initialized)165 return;166 167 efx->port_initialized = false;168 169 efx->link_state.up = false;170 efx_link_status_changed(efx);171}172 173static void efx_remove_port(struct efx_nic *efx)174{175 netif_dbg(efx, drv, efx->net_dev, "destroying port\n");176 177 efx->type->remove_port(efx);178}179 180/**************************************************************************181 *182 * NIC handling183 *184 **************************************************************************/185 186static LIST_HEAD(efx_primary_list);187static LIST_HEAD(efx_unassociated_list);188 189static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right)190{191 return left->type == right->type &&192 left->vpd_sn && right->vpd_sn &&193 !strcmp(left->vpd_sn, right->vpd_sn);194}195 196static void efx_associate(struct efx_nic *efx)197{198 struct efx_nic *other, *next;199 200 if (efx->primary == efx) {201 /* Adding primary function; look for secondaries */202 203 netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n");204 list_add_tail(&efx->node, &efx_primary_list);205 206 list_for_each_entry_safe(other, next, &efx_unassociated_list,207 node) {208 if (efx_same_controller(efx, other)) {209 list_del(&other->node);210 netif_dbg(other, probe, other->net_dev,211 "moving to secondary list of %s %s\n",212 pci_name(efx->pci_dev),213 efx->net_dev->name);214 list_add_tail(&other->node,215 &efx->secondary_list);216 other->primary = efx;217 }218 }219 } else {220 /* Adding secondary function; look for primary */221 222 list_for_each_entry(other, &efx_primary_list, node) {223 if (efx_same_controller(efx, other)) {224 netif_dbg(efx, probe, efx->net_dev,225 "adding to secondary list of %s %s\n",226 pci_name(other->pci_dev),227 other->net_dev->name);228 list_add_tail(&efx->node,229 &other->secondary_list);230 efx->primary = other;231 return;232 }233 }234 235 netif_dbg(efx, probe, efx->net_dev,236 "adding to unassociated list\n");237 list_add_tail(&efx->node, &efx_unassociated_list);238 }239}240 241static void efx_dissociate(struct efx_nic *efx)242{243 struct efx_nic *other, *next;244 245 list_del(&efx->node);246 efx->primary = NULL;247 248 list_for_each_entry_safe(other, next, &efx->secondary_list, node) {249 list_del(&other->node);250 netif_dbg(other, probe, other->net_dev,251 "moving to unassociated list\n");252 list_add_tail(&other->node, &efx_unassociated_list);253 other->primary = NULL;254 }255}256 257static int efx_probe_nic(struct efx_nic *efx)258{259 int rc;260 261 netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");262 263 /* Carry out hardware-type specific initialisation */264 rc = efx->type->probe(efx);265 if (rc)266 return rc;267 268 do {269 if (!efx->max_channels || !efx->max_tx_channels) {270 netif_err(efx, drv, efx->net_dev,271 "Insufficient resources to allocate"272 " any channels\n");273 rc = -ENOSPC;274 goto fail1;275 }276 277 /* Determine the number of channels and queues by trying278 * to hook in MSI-X interrupts.279 */280 rc = efx_probe_interrupts(efx);281 if (rc)282 goto fail1;283 284 rc = efx_set_channels(efx);285 if (rc)286 goto fail1;287 288 /* dimension_resources can fail with EAGAIN */289 rc = efx->type->dimension_resources(efx);290 if (rc != 0 && rc != -EAGAIN)291 goto fail2;292 293 if (rc == -EAGAIN)294 /* try again with new max_channels */295 efx_remove_interrupts(efx);296 297 } while (rc == -EAGAIN);298 299 if (efx->n_channels > 1)300 netdev_rss_key_fill(efx->rss_context.rx_hash_key,301 sizeof(efx->rss_context.rx_hash_key));302 efx_set_default_rx_indir_table(efx, efx->rss_context.rx_indir_table);303 304 /* Initialise the interrupt moderation settings */305 efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000);306 efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true,307 true);308 309 return 0;310 311fail2:312 efx_remove_interrupts(efx);313fail1:314 efx->type->remove(efx);315 return rc;316}317 318static void efx_remove_nic(struct efx_nic *efx)319{320 netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");321 322 efx_remove_interrupts(efx);323 efx->type->remove(efx);324}325 326/**************************************************************************327 *328 * NIC startup/shutdown329 *330 *************************************************************************/331 332static int efx_probe_all(struct efx_nic *efx)333{334 int rc;335 336 rc = efx_probe_nic(efx);337 if (rc) {338 netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");339 goto fail1;340 }341 342 rc = efx_probe_port(efx);343 if (rc) {344 netif_err(efx, probe, efx->net_dev, "failed to create port\n");345 goto fail2;346 }347 348 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT);349 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) {350 rc = -EINVAL;351 goto fail3;352 }353 354#ifdef CONFIG_SFC_SRIOV355 rc = efx->type->vswitching_probe(efx);356 if (rc) /* not fatal; the PF will still work fine */357 netif_warn(efx, probe, efx->net_dev,358 "failed to setup vswitching rc=%d;"359 " VFs may not function\n", rc);360#endif361 362 rc = efx_probe_filters(efx);363 if (rc) {364 netif_err(efx, probe, efx->net_dev,365 "failed to create filter tables\n");366 goto fail4;367 }368 369 rc = efx_probe_channels(efx);370 if (rc)371 goto fail5;372 373 efx->state = STATE_NET_DOWN;374 375 return 0;376 377 fail5:378 efx_remove_filters(efx);379 fail4:380#ifdef CONFIG_SFC_SRIOV381 efx->type->vswitching_remove(efx);382#endif383 fail3:384 efx_remove_port(efx);385 fail2:386 efx_remove_nic(efx);387 fail1:388 return rc;389}390 391static void efx_remove_all(struct efx_nic *efx)392{393 rtnl_lock();394 efx_xdp_setup_prog(efx, NULL);395 rtnl_unlock();396 397 efx_remove_channels(efx);398 efx_remove_filters(efx);399#ifdef CONFIG_SFC_SRIOV400 efx->type->vswitching_remove(efx);401#endif402 efx_remove_port(efx);403 efx_remove_nic(efx);404}405 406/**************************************************************************407 *408 * Interrupt moderation409 *410 **************************************************************************/411unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs)412{413 if (usecs == 0)414 return 0;415 if (usecs * 1000 < efx->timer_quantum_ns)416 return 1; /* never round down to 0 */417 return usecs * 1000 / efx->timer_quantum_ns;418}419 420unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks)421{422 /* We must round up when converting ticks to microseconds423 * because we round down when converting the other way.424 */425 return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000);426}427 428/* Set interrupt moderation parameters */429int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,430 unsigned int rx_usecs, bool rx_adaptive,431 bool rx_may_override_tx)432{433 struct efx_channel *channel;434 unsigned int timer_max_us;435 436 EFX_ASSERT_RESET_SERIALISED(efx);437 438 timer_max_us = efx->timer_max_ns / 1000;439 440 if (tx_usecs > timer_max_us || rx_usecs > timer_max_us)441 return -EINVAL;442 443 if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 &&444 !rx_may_override_tx) {445 netif_err(efx, drv, efx->net_dev, "Channels are shared. "446 "RX and TX IRQ moderation must be equal\n");447 return -EINVAL;448 }449 450 efx->irq_rx_adaptive = rx_adaptive;451 efx->irq_rx_moderation_us = rx_usecs;452 efx_for_each_channel(channel, efx) {453 if (efx_channel_has_rx_queue(channel))454 channel->irq_moderation_us = rx_usecs;455 else if (efx_channel_has_tx_queues(channel))456 channel->irq_moderation_us = tx_usecs;457 else if (efx_channel_is_xdp_tx(channel))458 channel->irq_moderation_us = tx_usecs;459 }460 461 return 0;462}463 464void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,465 unsigned int *rx_usecs, bool *rx_adaptive)466{467 *rx_adaptive = efx->irq_rx_adaptive;468 *rx_usecs = efx->irq_rx_moderation_us;469 470 /* If channels are shared between RX and TX, so is IRQ471 * moderation. Otherwise, IRQ moderation is the same for all472 * TX channels and is not adaptive.473 */474 if (efx->tx_channel_offset == 0) {475 *tx_usecs = *rx_usecs;476 } else {477 struct efx_channel *tx_channel;478 479 tx_channel = efx->channel[efx->tx_channel_offset];480 *tx_usecs = tx_channel->irq_moderation_us;481 }482}483 484/**************************************************************************485 *486 * ioctls487 *488 *************************************************************************/489 490/* Net device ioctl491 * Context: process, rtnl_lock() held.492 */493static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)494{495 struct efx_nic *efx = efx_netdev_priv(net_dev);496 struct mii_ioctl_data *data = if_mii(ifr);497 498 /* Convert phy_id from older PRTAD/DEVAD format */499 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&500 (data->phy_id & 0xfc00) == 0x0400)501 data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;502 503 return mdio_mii_ioctl(&efx->mdio, data, cmd);504}505 506/**************************************************************************507 *508 * Kernel net device interface509 *510 *************************************************************************/511 512/* Context: process, rtnl_lock() held. */513int efx_net_open(struct net_device *net_dev)514{515 struct efx_nic *efx = efx_netdev_priv(net_dev);516 int rc;517 518 netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",519 raw_smp_processor_id());520 521 rc = efx_check_disabled(efx);522 if (rc)523 return rc;524 if (efx->phy_mode & PHY_MODE_SPECIAL)525 return -EBUSY;526 if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))527 return -EIO;528 529 /* Notify the kernel of the link state polled during driver load,530 * before the monitor starts running */531 efx_link_status_changed(efx);532 533 efx_start_all(efx);534 if (efx->state == STATE_DISABLED || efx->reset_pending)535 netif_device_detach(efx->net_dev);536 else537 efx->state = STATE_NET_UP;538 539 return 0;540}541 542/* Context: process, rtnl_lock() held.543 * Note that the kernel will ignore our return code; this method544 * should really be a void.545 */546int efx_net_stop(struct net_device *net_dev)547{548 struct efx_nic *efx = efx_netdev_priv(net_dev);549 550 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",551 raw_smp_processor_id());552 553 /* Stop the device and flush all the channels */554 efx_stop_all(efx);555 556 return 0;557}558 559static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid)560{561 struct efx_nic *efx = efx_netdev_priv(net_dev);562 563 if (efx->type->vlan_rx_add_vid)564 return efx->type->vlan_rx_add_vid(efx, proto, vid);565 else566 return -EOPNOTSUPP;567}568 569static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid)570{571 struct efx_nic *efx = efx_netdev_priv(net_dev);572 573 if (efx->type->vlan_rx_kill_vid)574 return efx->type->vlan_rx_kill_vid(efx, proto, vid);575 else576 return -EOPNOTSUPP;577}578 579static int efx_hwtstamp_set(struct net_device *net_dev,580 struct kernel_hwtstamp_config *config,581 struct netlink_ext_ack *extack)582{583 struct efx_nic *efx = efx_netdev_priv(net_dev);584 585 return efx_ptp_set_ts_config(efx, config, extack);586}587 588static int efx_hwtstamp_get(struct net_device *net_dev,589 struct kernel_hwtstamp_config *config)590{591 struct efx_nic *efx = efx_netdev_priv(net_dev);592 593 return efx_ptp_get_ts_config(efx, config);594}595 596static const struct net_device_ops efx_netdev_ops = {597 .ndo_open = efx_net_open,598 .ndo_stop = efx_net_stop,599 .ndo_get_stats64 = efx_net_stats,600 .ndo_tx_timeout = efx_watchdog,601 .ndo_start_xmit = efx_hard_start_xmit,602 .ndo_validate_addr = eth_validate_addr,603 .ndo_eth_ioctl = efx_ioctl,604 .ndo_change_mtu = efx_change_mtu,605 .ndo_set_mac_address = efx_set_mac_address,606 .ndo_set_rx_mode = efx_set_rx_mode,607 .ndo_set_features = efx_set_features,608 .ndo_features_check = efx_features_check,609 .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid,610 .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid,611 .ndo_hwtstamp_set = efx_hwtstamp_set,612 .ndo_hwtstamp_get = efx_hwtstamp_get,613#ifdef CONFIG_SFC_SRIOV614 .ndo_set_vf_mac = efx_sriov_set_vf_mac,615 .ndo_set_vf_vlan = efx_sriov_set_vf_vlan,616 .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk,617 .ndo_get_vf_config = efx_sriov_get_vf_config,618 .ndo_set_vf_link_state = efx_sriov_set_vf_link_state,619#endif620 .ndo_get_phys_port_id = efx_get_phys_port_id,621 .ndo_get_phys_port_name = efx_get_phys_port_name,622#ifdef CONFIG_RFS_ACCEL623 .ndo_rx_flow_steer = efx_filter_rfs,624#endif625 .ndo_xdp_xmit = efx_xdp_xmit,626 .ndo_bpf = efx_xdp627};628 629static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog)630{631 struct bpf_prog *old_prog;632 633 if (efx->xdp_rxq_info_failed) {634 netif_err(efx, drv, efx->net_dev,635 "Unable to bind XDP program due to previous failure of rxq_info\n");636 return -EINVAL;637 }638 639 if (prog && efx->net_dev->mtu > efx_xdp_max_mtu(efx)) {640 netif_err(efx, drv, efx->net_dev,641 "Unable to configure XDP with MTU of %d (max: %d)\n",642 efx->net_dev->mtu, efx_xdp_max_mtu(efx));643 return -EINVAL;644 }645 646 old_prog = rtnl_dereference(efx->xdp_prog);647 rcu_assign_pointer(efx->xdp_prog, prog);648 /* Release the reference that was originally passed by the caller. */649 if (old_prog)650 bpf_prog_put(old_prog);651 652 return 0;653}654 655/* Context: process, rtnl_lock() held. */656static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp)657{658 struct efx_nic *efx = efx_netdev_priv(dev);659 660 switch (xdp->command) {661 case XDP_SETUP_PROG:662 return efx_xdp_setup_prog(efx, xdp->prog);663 default:664 return -EINVAL;665 }666}667 668static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,669 u32 flags)670{671 struct efx_nic *efx = efx_netdev_priv(dev);672 673 if (!netif_running(dev))674 return -EINVAL;675 676 return efx_xdp_tx_buffers(efx, n, xdpfs, flags & XDP_XMIT_FLUSH);677}678 679static void efx_update_name(struct efx_nic *efx)680{681 strcpy(efx->name, efx->net_dev->name);682 efx_mtd_rename(efx);683 efx_set_channel_names(efx);684}685 686static int efx_netdev_event(struct notifier_block *this,687 unsigned long event, void *ptr)688{689 struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);690 691 if ((net_dev->netdev_ops == &efx_netdev_ops) &&692 event == NETDEV_CHANGENAME)693 efx_update_name(efx_netdev_priv(net_dev));694 695 return NOTIFY_DONE;696}697 698static struct notifier_block efx_netdev_notifier = {699 .notifier_call = efx_netdev_event,700};701 702static ssize_t phy_type_show(struct device *dev,703 struct device_attribute *attr, char *buf)704{705 struct efx_nic *efx = dev_get_drvdata(dev);706 return sprintf(buf, "%d\n", efx->phy_type);707}708static DEVICE_ATTR_RO(phy_type);709 710static int efx_register_netdev(struct efx_nic *efx)711{712 struct net_device *net_dev = efx->net_dev;713 struct efx_channel *channel;714 int rc;715 716 net_dev->watchdog_timeo = 5 * HZ;717 net_dev->irq = efx->pci_dev->irq;718 net_dev->netdev_ops = &efx_netdev_ops;719 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)720 net_dev->priv_flags |= IFF_UNICAST_FLT;721 net_dev->ethtool_ops = &efx_ethtool_ops;722 netif_set_tso_max_segs(net_dev, EFX_TSO_MAX_SEGS);723 net_dev->min_mtu = EFX_MIN_MTU;724 net_dev->max_mtu = EFX_MAX_MTU;725 726 rtnl_lock();727 728 /* Enable resets to be scheduled and check whether any were729 * already requested. If so, the NIC is probably hosed so we730 * abort.731 */732 if (efx->reset_pending) {733 pci_err(efx->pci_dev, "aborting probe due to scheduled reset\n");734 rc = -EIO;735 goto fail_locked;736 }737 738 rc = dev_alloc_name(net_dev, net_dev->name);739 if (rc < 0)740 goto fail_locked;741 efx_update_name(efx);742 743 /* Always start with carrier off; PHY events will detect the link */744 netif_carrier_off(net_dev);745 746 rc = register_netdevice(net_dev);747 if (rc)748 goto fail_locked;749 750 efx_for_each_channel(channel, efx) {751 struct efx_tx_queue *tx_queue;752 efx_for_each_channel_tx_queue(tx_queue, channel)753 efx_init_tx_queue_core_txq(tx_queue);754 }755 756 efx_associate(efx);757 758 efx->state = STATE_NET_DOWN;759 760 rtnl_unlock();761 762 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);763 if (rc) {764 netif_err(efx, drv, efx->net_dev,765 "failed to init net dev attributes\n");766 goto fail_registered;767 }768 769 efx_init_mcdi_logging(efx);770 771 return 0;772 773fail_registered:774 rtnl_lock();775 efx_dissociate(efx);776 unregister_netdevice(net_dev);777fail_locked:778 efx->state = STATE_UNINIT;779 rtnl_unlock();780 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");781 return rc;782}783 784static void efx_unregister_netdev(struct efx_nic *efx)785{786 if (!efx->net_dev)787 return;788 789 if (WARN_ON(efx_netdev_priv(efx->net_dev) != efx))790 return;791 792 if (efx_dev_registered(efx)) {793 strscpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));794 efx_fini_mcdi_logging(efx);795 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);796 unregister_netdev(efx->net_dev);797 }798}799 800/**************************************************************************801 *802 * List of NICs we support803 *804 **************************************************************************/805 806/* PCI device ID table */807static const struct pci_device_id efx_pci_table[] = {808 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */809 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},810 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */811 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},812 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */813 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},814 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */815 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},816 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */817 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},818 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */819 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},820 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0b03), /* SFC9250 PF */821 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},822 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1b03), /* SFC9250 VF */823 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},824 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0c03), /* X4 PF (FF/LL) */825 .driver_data = (unsigned long)&efx_x4_nic_type},826 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x2c03), /* X4 PF (FF only) */827 .driver_data = (unsigned long)&efx_x4_nic_type},828 {0} /* end of list */829};830 831/**************************************************************************832 *833 * Data housekeeping834 *835 **************************************************************************/836 837void efx_update_sw_stats(struct efx_nic *efx, u64 *stats)838{839 u64 n_rx_nodesc_trunc = 0;840 struct efx_channel *channel;841 842 efx_for_each_channel(channel, efx)843 n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;844 stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;845 stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);846}847 848/**************************************************************************849 *850 * PCI interface851 *852 **************************************************************************/853 854/* Main body of final NIC shutdown code855 * This is called only at module unload (or hotplug removal).856 */857static void efx_pci_remove_main(struct efx_nic *efx)858{859 /* Flush reset_work. It can no longer be scheduled since we860 * are not READY.861 */862 WARN_ON(efx_net_active(efx->state));863 efx_flush_reset_workqueue(efx);864 865 efx_disable_interrupts(efx);866 efx_clear_interrupt_affinity(efx);867 efx_nic_fini_interrupt(efx);868 efx_fini_port(efx);869 efx->type->fini(efx);870 efx_fini_napi(efx);871 efx_remove_all(efx);872}873 874/* Final NIC shutdown875 * This is called only at module unload (or hotplug removal). A PF can call876 * this on its VFs to ensure they are unbound first.877 */878static void efx_pci_remove(struct pci_dev *pci_dev)879{880 struct efx_probe_data *probe_data;881 struct efx_nic *efx;882 883 efx = pci_get_drvdata(pci_dev);884 if (!efx)885 return;886 887 /* Mark the NIC as fini, then stop the interface */888 rtnl_lock();889 efx_dissociate(efx);890 dev_close(efx->net_dev);891 efx_disable_interrupts(efx);892 efx->state = STATE_UNINIT;893 rtnl_unlock();894 895 if (efx->type->sriov_fini)896 efx->type->sriov_fini(efx);897 898 efx_fini_devlink_lock(efx);899 efx_unregister_netdev(efx);900 901 efx_mtd_remove(efx);902 903 efx_pci_remove_main(efx);904 905 efx_fini_io(efx);906 pci_dbg(efx->pci_dev, "shutdown successful\n");907 908 efx_fini_devlink_and_unlock(efx);909 efx_fini_struct(efx);910 free_netdev(efx->net_dev);911 probe_data = container_of(efx, struct efx_probe_data, efx);912 kfree(probe_data);913};914 915/* NIC VPD information916 * Called during probe to display the part number of the917 * installed NIC.918 */919static void efx_probe_vpd_strings(struct efx_nic *efx)920{921 struct pci_dev *dev = efx->pci_dev;922 unsigned int vpd_size, kw_len;923 u8 *vpd_data;924 int start;925 926 vpd_data = pci_vpd_alloc(dev, &vpd_size);927 if (IS_ERR(vpd_data)) {928 pci_warn(dev, "Unable to read VPD\n");929 return;930 }931 932 start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,933 PCI_VPD_RO_KEYWORD_PARTNO, &kw_len);934 if (start < 0)935 pci_err(dev, "Part number not found or incomplete\n");936 else937 pci_info(dev, "Part Number : %.*s\n", kw_len, vpd_data + start);938 939 start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,940 PCI_VPD_RO_KEYWORD_SERIALNO, &kw_len);941 if (start < 0)942 pci_err(dev, "Serial number not found or incomplete\n");943 else944 efx->vpd_sn = kmemdup_nul(vpd_data + start, kw_len, GFP_KERNEL);945 946 kfree(vpd_data);947}948 949 950/* Main body of NIC initialisation951 * This is called at module load (or hotplug insertion, theoretically).952 */953static int efx_pci_probe_main(struct efx_nic *efx)954{955 int rc;956 957 /* Do start-of-day initialisation */958 rc = efx_probe_all(efx);959 if (rc)960 goto fail1;961 962 efx_init_napi(efx);963 964 down_write(&efx->filter_sem);965 rc = efx->type->init(efx);966 up_write(&efx->filter_sem);967 if (rc) {968 pci_err(efx->pci_dev, "failed to initialise NIC\n");969 goto fail3;970 }971 972 rc = efx_init_port(efx);973 if (rc) {974 netif_err(efx, probe, efx->net_dev,975 "failed to initialise port\n");976 goto fail4;977 }978 979 rc = efx_nic_init_interrupt(efx);980 if (rc)981 goto fail5;982 983 efx_set_interrupt_affinity(efx);984 rc = efx_enable_interrupts(efx);985 if (rc)986 goto fail6;987 988 return 0;989 990 fail6:991 efx_clear_interrupt_affinity(efx);992 efx_nic_fini_interrupt(efx);993 fail5:994 efx_fini_port(efx);995 fail4:996 efx->type->fini(efx);997 fail3:998 efx_fini_napi(efx);999 efx_remove_all(efx);1000 fail1:1001 return rc;1002}1003 1004static int efx_pci_probe_post_io(struct efx_nic *efx)1005{1006 struct net_device *net_dev = efx->net_dev;1007 int rc = efx_pci_probe_main(efx);1008 1009 if (rc)1010 return rc;1011 1012 if (efx->type->sriov_init) {1013 rc = efx->type->sriov_init(efx);1014 if (rc)1015 pci_err(efx->pci_dev, "SR-IOV can't be enabled rc %d\n",1016 rc);1017 }1018 1019 /* Determine netdevice features */1020 net_dev->features |= efx->type->offload_features;1021 1022 /* Add TSO features */1023 if (efx->type->tso_versions && efx->type->tso_versions(efx))1024 net_dev->features |= NETIF_F_TSO | NETIF_F_TSO6;1025 1026 /* Mask for features that also apply to VLAN devices */1027 net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG |1028 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |1029 NETIF_F_RXCSUM);1030 1031 /* Determine user configurable features */1032 net_dev->hw_features |= net_dev->features & ~efx->fixed_features;1033 1034 /* Disable receiving frames with bad FCS, by default. */1035 net_dev->features &= ~NETIF_F_RXALL;1036 1037 /* Disable VLAN filtering by default. It may be enforced if1038 * the feature is fixed (i.e. VLAN filters are required to1039 * receive VLAN tagged packets due to vPort restrictions).1040 */1041 net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;1042 net_dev->features |= efx->fixed_features;1043 1044 net_dev->xdp_features = NETDEV_XDP_ACT_BASIC |1045 NETDEV_XDP_ACT_REDIRECT |1046 NETDEV_XDP_ACT_NDO_XMIT;1047 1048 /* devlink creation, registration and lock */1049 rc = efx_probe_devlink_and_lock(efx);1050 if (rc)1051 pci_err(efx->pci_dev, "devlink registration failed");1052 1053 rc = efx_register_netdev(efx);1054 efx_probe_devlink_unlock(efx);1055 if (!rc)1056 return 0;1057 1058 efx_pci_remove_main(efx);1059 return rc;1060}1061 1062/* NIC initialisation1063 *1064 * This is called at module load (or hotplug insertion,1065 * theoretically). It sets up PCI mappings, resets the NIC,1066 * sets up and registers the network devices with the kernel and hooks1067 * the interrupt service routine. It does not prepare the device for1068 * transmission; this is left to the first time one of the network1069 * interfaces is brought up (i.e. efx_net_open).1070 */1071static int efx_pci_probe(struct pci_dev *pci_dev,1072 const struct pci_device_id *entry)1073{1074 struct efx_probe_data *probe_data, **probe_ptr;1075 struct net_device *net_dev;1076 struct efx_nic *efx;1077 int rc;1078 1079 /* Allocate probe data and struct efx_nic */1080 probe_data = kzalloc(sizeof(*probe_data), GFP_KERNEL);1081 if (!probe_data)1082 return -ENOMEM;1083 probe_data->pci_dev = pci_dev;1084 efx = &probe_data->efx;1085 1086 /* Allocate and initialise a struct net_device */1087 net_dev = alloc_etherdev_mq(sizeof(probe_data), EFX_MAX_CORE_TX_QUEUES);1088 if (!net_dev) {1089 rc = -ENOMEM;1090 goto fail0;1091 }1092 probe_ptr = netdev_priv(net_dev);1093 *probe_ptr = probe_data;1094 efx->net_dev = net_dev;1095 efx->type = (const struct efx_nic_type *) entry->driver_data;1096 efx->fixed_features |= NETIF_F_HIGHDMA;1097 1098 pci_set_drvdata(pci_dev, efx);1099 SET_NETDEV_DEV(net_dev, &pci_dev->dev);1100 rc = efx_init_struct(efx, pci_dev);1101 if (rc)1102 goto fail1;1103 efx->mdio.dev = net_dev;1104 1105 pci_info(pci_dev, "Solarflare NIC detected\n");1106 1107 if (!efx->type->is_vf)1108 efx_probe_vpd_strings(efx);1109 1110 /* Set up basic I/O (BAR mappings etc) */1111 rc = efx_init_io(efx, efx->type->mem_bar(efx), efx->type->max_dma_mask,1112 efx->type->mem_map_size(efx));1113 if (rc)1114 goto fail2;1115 1116 rc = efx_pci_probe_post_io(efx);1117 if (rc) {1118 /* On failure, retry once immediately.1119 * If we aborted probe due to a scheduled reset, dismiss it.1120 */1121 efx->reset_pending = 0;1122 rc = efx_pci_probe_post_io(efx);1123 if (rc) {1124 /* On another failure, retry once more1125 * after a 50-305ms delay.1126 */1127 unsigned char r;1128 1129 get_random_bytes(&r, 1);1130 msleep((unsigned int)r + 50);1131 efx->reset_pending = 0;1132 rc = efx_pci_probe_post_io(efx);1133 }1134 }1135 if (rc)1136 goto fail3;1137 1138 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");1139 1140 /* Try to create MTDs, but allow this to fail */1141 rtnl_lock();1142 rc = efx_mtd_probe(efx);1143 rtnl_unlock();1144 if (rc && rc != -EPERM)1145 netif_warn(efx, probe, efx->net_dev,1146 "failed to create MTDs (%d)\n", rc);1147 1148 if (efx->type->udp_tnl_push_ports)1149 efx->type->udp_tnl_push_ports(efx);1150 1151 return 0;1152 1153 fail3:1154 efx_fini_io(efx);1155 fail2:1156 efx_fini_struct(efx);1157 fail1:1158 WARN_ON(rc > 0);1159 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);1160 free_netdev(net_dev);1161 fail0:1162 kfree(probe_data);1163 return rc;1164}1165 1166/* efx_pci_sriov_configure returns the actual number of Virtual Functions1167 * enabled on success1168 */1169#ifdef CONFIG_SFC_SRIOV1170static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs)1171{1172 int rc;1173 struct efx_nic *efx = pci_get_drvdata(dev);1174 1175 if (efx->type->sriov_configure) {1176 rc = efx->type->sriov_configure(efx, num_vfs);1177 if (rc)1178 return rc;1179 else1180 return num_vfs;1181 } else1182 return -EOPNOTSUPP;1183}1184#endif1185 1186static int efx_pm_freeze(struct device *dev)1187{1188 struct efx_nic *efx = dev_get_drvdata(dev);1189 1190 rtnl_lock();1191 1192 if (efx_net_active(efx->state)) {1193 efx_device_detach_sync(efx);1194 1195 efx_stop_all(efx);1196 efx_disable_interrupts(efx);1197 1198 efx->state = efx_freeze(efx->state);1199 }1200 1201 rtnl_unlock();1202 1203 return 0;1204}1205 1206static void efx_pci_shutdown(struct pci_dev *pci_dev)1207{1208 struct efx_nic *efx = pci_get_drvdata(pci_dev);1209 1210 if (!efx)1211 return;1212 1213 efx_pm_freeze(&pci_dev->dev);1214 pci_disable_device(pci_dev);1215}1216 1217static int efx_pm_thaw(struct device *dev)1218{1219 int rc;1220 struct efx_nic *efx = dev_get_drvdata(dev);1221 1222 rtnl_lock();1223 1224 if (efx_frozen(efx->state)) {1225 rc = efx_enable_interrupts(efx);1226 if (rc)1227 goto fail;1228 1229 mutex_lock(&efx->mac_lock);1230 efx_mcdi_port_reconfigure(efx);1231 mutex_unlock(&efx->mac_lock);1232 1233 efx_start_all(efx);1234 1235 efx_device_attach_if_not_resetting(efx);1236 1237 efx->state = efx_thaw(efx->state);1238 1239 efx->type->resume_wol(efx);1240 }1241 1242 rtnl_unlock();1243 1244 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */1245 efx_queue_reset_work(efx);1246 1247 return 0;1248 1249fail:1250 rtnl_unlock();1251 1252 return rc;1253}1254 1255static int efx_pm_poweroff(struct device *dev)1256{1257 struct pci_dev *pci_dev = to_pci_dev(dev);1258 struct efx_nic *efx = pci_get_drvdata(pci_dev);1259 1260 efx->type->fini(efx);1261 1262 efx->reset_pending = 0;1263 1264 pci_save_state(pci_dev);1265 return pci_set_power_state(pci_dev, PCI_D3hot);1266}1267 1268/* Used for both resume and restore */1269static int efx_pm_resume(struct device *dev)1270{1271 struct pci_dev *pci_dev = to_pci_dev(dev);1272 struct efx_nic *efx = pci_get_drvdata(pci_dev);1273 int rc;1274 1275 rc = pci_set_power_state(pci_dev, PCI_D0);1276 if (rc)1277 return rc;1278 pci_restore_state(pci_dev);1279 rc = pci_enable_device(pci_dev);1280 if (rc)1281 return rc;1282 pci_set_master(efx->pci_dev);1283 rc = efx->type->reset(efx, RESET_TYPE_ALL);1284 if (rc)1285 return rc;1286 down_write(&efx->filter_sem);1287 rc = efx->type->init(efx);1288 up_write(&efx->filter_sem);1289 if (rc)1290 return rc;1291 rc = efx_pm_thaw(dev);1292 return rc;1293}1294 1295static int efx_pm_suspend(struct device *dev)1296{1297 int rc;1298 1299 efx_pm_freeze(dev);1300 rc = efx_pm_poweroff(dev);1301 if (rc)1302 efx_pm_resume(dev);1303 return rc;1304}1305 1306static const struct dev_pm_ops efx_pm_ops = {1307 .suspend = efx_pm_suspend,1308 .resume = efx_pm_resume,1309 .freeze = efx_pm_freeze,1310 .thaw = efx_pm_thaw,1311 .poweroff = efx_pm_poweroff,1312 .restore = efx_pm_resume,1313};1314 1315static struct pci_driver efx_pci_driver = {1316 .name = KBUILD_MODNAME,1317 .id_table = efx_pci_table,1318 .probe = efx_pci_probe,1319 .remove = efx_pci_remove,1320 .driver.pm = &efx_pm_ops,1321 .shutdown = efx_pci_shutdown,1322 .err_handler = &efx_err_handlers,1323#ifdef CONFIG_SFC_SRIOV1324 .sriov_configure = efx_pci_sriov_configure,1325#endif1326};1327 1328/**************************************************************************1329 *1330 * Kernel module interface1331 *1332 *************************************************************************/1333 1334static int __init efx_init_module(void)1335{1336 int rc;1337 1338 printk(KERN_INFO "Solarflare NET driver\n");1339 1340 rc = register_netdevice_notifier(&efx_netdev_notifier);1341 if (rc)1342 goto err_notifier;1343 1344 rc = efx_create_reset_workqueue();1345 if (rc)1346 goto err_reset;1347 1348 rc = pci_register_driver(&efx_pci_driver);1349 if (rc < 0)1350 goto err_pci;1351 1352 rc = pci_register_driver(&ef100_pci_driver);1353 if (rc < 0)1354 goto err_pci_ef100;1355 1356 return 0;1357 1358 err_pci_ef100:1359 pci_unregister_driver(&efx_pci_driver);1360 err_pci:1361 efx_destroy_reset_workqueue();1362 err_reset:1363 unregister_netdevice_notifier(&efx_netdev_notifier);1364 err_notifier:1365 return rc;1366}1367 1368static void __exit efx_exit_module(void)1369{1370 printk(KERN_INFO "Solarflare NET driver unloading\n");1371 1372 pci_unregister_driver(&ef100_pci_driver);1373 pci_unregister_driver(&efx_pci_driver);1374 efx_destroy_reset_workqueue();1375 unregister_netdevice_notifier(&efx_netdev_notifier);1376 1377}1378 1379module_init(efx_init_module);1380module_exit(efx_exit_module);1381 1382MODULE_AUTHOR("Solarflare Communications and "1383 "Michael Brown <mbrown@fensystems.co.uk>");1384MODULE_DESCRIPTION("Solarflare network driver");1385MODULE_LICENSE("GPL");1386MODULE_DEVICE_TABLE(pci, efx_pci_table);1387