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.
8 #include <linux/module.h>
10 #include <linux/netdevice.h>
11 #include <linux/etherdevice.h>
12 #include <linux/delay.h>
13 #include <linux/notifier.h>
15 #include <linux/tcp.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"
24 #include <net/udp_tunnel.h>
26 #include "efx_common.h"
27 #include "efx_channels.h"
29 #include "rx_common.h"
30 #include "tx_common.h"
37 #include "mcdi_pcol.h"
38 #include "workarounds.h"
40 /**************************************************************************
44 *************************************************************************/
46 module_param_named(interrupt_mode, efx_interrupt_mode, uint, 0444);
47 MODULE_PARM_DESC(interrupt_mode,
48 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
50 module_param(rss_cpus, uint, 0444);
51 MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling");
54 * Use separate channels for TX and RX events
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.
59 * This is only used in MSI-X interrupt mode
61 bool efx_separate_tx_channels;
62 module_param(efx_separate_tx_channels, bool, 0444);
63 MODULE_PARM_DESC(efx_separate_tx_channels,
64 "Use separate channels for TX and RX");
66 /* Initial interrupt moderation settings. They can be modified after
67 * module load with ethtool.
69 * The default for RX should strike a balance between increasing the
70 * round-trip latency and reducing overhead.
72 static unsigned int rx_irq_mod_usec = 60;
74 /* Initial interrupt moderation settings. They can be modified after
75 * module load with ethtool.
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.
83 static unsigned int tx_irq_mod_usec = 150;
85 static bool phy_flash_cfg;
86 module_param(phy_flash_cfg, bool, 0644);
87 MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially");
89 static 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);
93 module_param(debug, uint, 0);
94 MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value");
96 /**************************************************************************
98 * Utility functions and prototypes
100 *************************************************************************/
102 static void efx_remove_port(struct efx_nic *efx);
103 static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog);
104 static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp);
105 static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
108 #define EFX_ASSERT_RESET_SERIALISED(efx) \
110 if ((efx->state == STATE_READY) || \
111 (efx->state == STATE_RECOVERY) || \
112 (efx->state == STATE_DISABLED)) \
116 /**************************************************************************
120 **************************************************************************/
122 static void efx_fini_port(struct efx_nic *efx);
124 static int efx_probe_port(struct efx_nic *efx)
128 netif_dbg(efx, probe, efx->net_dev, "create port\n");
131 efx->phy_mode = PHY_MODE_SPECIAL;
133 /* Connect up MAC/PHY operations table */
134 rc = efx->type->probe_port(efx);
138 /* Initialise MAC address to permanent address */
139 ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr);
144 static int efx_init_port(struct efx_nic *efx)
148 netif_dbg(efx, drv, efx->net_dev, "init port\n");
150 mutex_lock(&efx->mac_lock);
152 rc = efx->phy_op->init(efx);
156 efx->port_initialized = true;
158 /* Ensure the PHY advertises the correct flow control settings */
159 rc = efx->phy_op->reconfigure(efx);
160 if (rc && rc != -EPERM)
163 mutex_unlock(&efx->mac_lock);
167 efx->phy_op->fini(efx);
169 mutex_unlock(&efx->mac_lock);
173 static void efx_fini_port(struct efx_nic *efx)
175 netif_dbg(efx, drv, efx->net_dev, "shut down port\n");
177 if (!efx->port_initialized)
180 efx->phy_op->fini(efx);
181 efx->port_initialized = false;
183 efx->link_state.up = false;
184 efx_link_status_changed(efx);
187 static void efx_remove_port(struct efx_nic *efx)
189 netif_dbg(efx, drv, efx->net_dev, "destroying port\n");
191 efx->type->remove_port(efx);
194 /**************************************************************************
198 **************************************************************************/
200 static LIST_HEAD(efx_primary_list);
201 static LIST_HEAD(efx_unassociated_list);
203 static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right)
205 return left->type == right->type &&
206 left->vpd_sn && right->vpd_sn &&
207 !strcmp(left->vpd_sn, right->vpd_sn);
210 static void efx_associate(struct efx_nic *efx)
212 struct efx_nic *other, *next;
214 if (efx->primary == efx) {
215 /* Adding primary function; look for secondaries */
217 netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n");
218 list_add_tail(&efx->node, &efx_primary_list);
220 list_for_each_entry_safe(other, next, &efx_unassociated_list,
222 if (efx_same_controller(efx, other)) {
223 list_del(&other->node);
224 netif_dbg(other, probe, other->net_dev,
225 "moving to secondary list of %s %s\n",
226 pci_name(efx->pci_dev),
228 list_add_tail(&other->node,
229 &efx->secondary_list);
230 other->primary = efx;
234 /* Adding secondary function; look for primary */
236 list_for_each_entry(other, &efx_primary_list, node) {
237 if (efx_same_controller(efx, other)) {
238 netif_dbg(efx, probe, efx->net_dev,
239 "adding to secondary list of %s %s\n",
240 pci_name(other->pci_dev),
241 other->net_dev->name);
242 list_add_tail(&efx->node,
243 &other->secondary_list);
244 efx->primary = other;
249 netif_dbg(efx, probe, efx->net_dev,
250 "adding to unassociated list\n");
251 list_add_tail(&efx->node, &efx_unassociated_list);
255 static void efx_dissociate(struct efx_nic *efx)
257 struct efx_nic *other, *next;
259 list_del(&efx->node);
262 list_for_each_entry_safe(other, next, &efx->secondary_list, node) {
263 list_del(&other->node);
264 netif_dbg(other, probe, other->net_dev,
265 "moving to unassociated list\n");
266 list_add_tail(&other->node, &efx_unassociated_list);
267 other->primary = NULL;
271 static int efx_probe_nic(struct efx_nic *efx)
275 netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
277 /* Carry out hardware-type specific initialisation */
278 rc = efx->type->probe(efx);
283 if (!efx->max_channels || !efx->max_tx_channels) {
284 netif_err(efx, drv, efx->net_dev,
285 "Insufficient resources to allocate"
291 /* Determine the number of channels and queues by trying
292 * to hook in MSI-X interrupts.
294 rc = efx_probe_interrupts(efx);
298 rc = efx_set_channels(efx);
302 /* dimension_resources can fail with EAGAIN */
303 rc = efx->type->dimension_resources(efx);
304 if (rc != 0 && rc != -EAGAIN)
308 /* try again with new max_channels */
309 efx_remove_interrupts(efx);
311 } while (rc == -EAGAIN);
313 if (efx->n_channels > 1)
314 netdev_rss_key_fill(efx->rss_context.rx_hash_key,
315 sizeof(efx->rss_context.rx_hash_key));
316 efx_set_default_rx_indir_table(efx, &efx->rss_context);
318 /* Initialise the interrupt moderation settings */
319 efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000);
320 efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true,
326 efx_remove_interrupts(efx);
328 efx->type->remove(efx);
332 static void efx_remove_nic(struct efx_nic *efx)
334 netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");
336 efx_remove_interrupts(efx);
337 efx->type->remove(efx);
340 /**************************************************************************
342 * NIC startup/shutdown
344 *************************************************************************/
346 static int efx_probe_all(struct efx_nic *efx)
350 rc = efx_probe_nic(efx);
352 netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
356 rc = efx_probe_port(efx);
358 netif_err(efx, probe, efx->net_dev, "failed to create port\n");
362 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT);
363 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) {
368 #ifdef CONFIG_SFC_SRIOV
369 rc = efx->type->vswitching_probe(efx);
370 if (rc) /* not fatal; the PF will still work fine */
371 netif_warn(efx, probe, efx->net_dev,
372 "failed to setup vswitching rc=%d;"
373 " VFs may not function\n", rc);
376 rc = efx_probe_filters(efx);
378 netif_err(efx, probe, efx->net_dev,
379 "failed to create filter tables\n");
383 rc = efx_probe_channels(efx);
390 efx_remove_filters(efx);
392 #ifdef CONFIG_SFC_SRIOV
393 efx->type->vswitching_remove(efx);
396 efx_remove_port(efx);
403 static void efx_remove_all(struct efx_nic *efx)
406 efx_xdp_setup_prog(efx, NULL);
409 efx_remove_channels(efx);
410 efx_remove_filters(efx);
411 #ifdef CONFIG_SFC_SRIOV
412 efx->type->vswitching_remove(efx);
414 efx_remove_port(efx);
418 /**************************************************************************
420 * Interrupt moderation
422 **************************************************************************/
423 unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs)
427 if (usecs * 1000 < efx->timer_quantum_ns)
428 return 1; /* never round down to 0 */
429 return usecs * 1000 / efx->timer_quantum_ns;
432 unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks)
434 /* We must round up when converting ticks to microseconds
435 * because we round down when converting the other way.
437 return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000);
440 /* Set interrupt moderation parameters */
441 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
442 unsigned int rx_usecs, bool rx_adaptive,
443 bool rx_may_override_tx)
445 struct efx_channel *channel;
446 unsigned int timer_max_us;
448 EFX_ASSERT_RESET_SERIALISED(efx);
450 timer_max_us = efx->timer_max_ns / 1000;
452 if (tx_usecs > timer_max_us || rx_usecs > timer_max_us)
455 if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 &&
456 !rx_may_override_tx) {
457 netif_err(efx, drv, efx->net_dev, "Channels are shared. "
458 "RX and TX IRQ moderation must be equal\n");
462 efx->irq_rx_adaptive = rx_adaptive;
463 efx->irq_rx_moderation_us = rx_usecs;
464 efx_for_each_channel(channel, efx) {
465 if (efx_channel_has_rx_queue(channel))
466 channel->irq_moderation_us = rx_usecs;
467 else if (efx_channel_has_tx_queues(channel))
468 channel->irq_moderation_us = tx_usecs;
469 else if (efx_channel_is_xdp_tx(channel))
470 channel->irq_moderation_us = tx_usecs;
476 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
477 unsigned int *rx_usecs, bool *rx_adaptive)
479 *rx_adaptive = efx->irq_rx_adaptive;
480 *rx_usecs = efx->irq_rx_moderation_us;
482 /* If channels are shared between RX and TX, so is IRQ
483 * moderation. Otherwise, IRQ moderation is the same for all
484 * TX channels and is not adaptive.
486 if (efx->tx_channel_offset == 0) {
487 *tx_usecs = *rx_usecs;
489 struct efx_channel *tx_channel;
491 tx_channel = efx->channel[efx->tx_channel_offset];
492 *tx_usecs = tx_channel->irq_moderation_us;
496 /**************************************************************************
500 *************************************************************************/
503 * Context: process, rtnl_lock() held.
505 static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
507 struct efx_nic *efx = netdev_priv(net_dev);
508 struct mii_ioctl_data *data = if_mii(ifr);
510 if (cmd == SIOCSHWTSTAMP)
511 return efx_ptp_set_ts_config(efx, ifr);
512 if (cmd == SIOCGHWTSTAMP)
513 return efx_ptp_get_ts_config(efx, ifr);
515 /* Convert phy_id from older PRTAD/DEVAD format */
516 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
517 (data->phy_id & 0xfc00) == 0x0400)
518 data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;
520 return mdio_mii_ioctl(&efx->mdio, data, cmd);
523 /**************************************************************************
525 * Kernel net device interface
527 *************************************************************************/
529 /* Context: process, rtnl_lock() held. */
530 int efx_net_open(struct net_device *net_dev)
532 struct efx_nic *efx = netdev_priv(net_dev);
535 netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
536 raw_smp_processor_id());
538 rc = efx_check_disabled(efx);
541 if (efx->phy_mode & PHY_MODE_SPECIAL)
543 if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
546 /* Notify the kernel of the link state polled during driver load,
547 * before the monitor starts running */
548 efx_link_status_changed(efx);
551 if (efx->state == STATE_DISABLED || efx->reset_pending)
552 netif_device_detach(efx->net_dev);
553 efx_selftest_async_start(efx);
557 /* Context: process, rtnl_lock() held.
558 * Note that the kernel will ignore our return code; this method
559 * should really be a void.
561 int efx_net_stop(struct net_device *net_dev)
563 struct efx_nic *efx = netdev_priv(net_dev);
565 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
566 raw_smp_processor_id());
568 /* Stop the device and flush all the channels */
574 static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid)
576 struct efx_nic *efx = netdev_priv(net_dev);
578 if (efx->type->vlan_rx_add_vid)
579 return efx->type->vlan_rx_add_vid(efx, proto, vid);
584 static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid)
586 struct efx_nic *efx = netdev_priv(net_dev);
588 if (efx->type->vlan_rx_kill_vid)
589 return efx->type->vlan_rx_kill_vid(efx, proto, vid);
594 static const struct net_device_ops efx_netdev_ops = {
595 .ndo_open = efx_net_open,
596 .ndo_stop = efx_net_stop,
597 .ndo_get_stats64 = efx_net_stats,
598 .ndo_tx_timeout = efx_watchdog,
599 .ndo_start_xmit = efx_hard_start_xmit,
600 .ndo_validate_addr = eth_validate_addr,
601 .ndo_do_ioctl = efx_ioctl,
602 .ndo_change_mtu = efx_change_mtu,
603 .ndo_set_mac_address = efx_set_mac_address,
604 .ndo_set_rx_mode = efx_set_rx_mode,
605 .ndo_set_features = efx_set_features,
606 .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid,
607 .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid,
608 #ifdef CONFIG_SFC_SRIOV
609 .ndo_set_vf_mac = efx_sriov_set_vf_mac,
610 .ndo_set_vf_vlan = efx_sriov_set_vf_vlan,
611 .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk,
612 .ndo_get_vf_config = efx_sriov_get_vf_config,
613 .ndo_set_vf_link_state = efx_sriov_set_vf_link_state,
615 .ndo_get_phys_port_id = efx_get_phys_port_id,
616 .ndo_get_phys_port_name = efx_get_phys_port_name,
617 .ndo_setup_tc = efx_setup_tc,
618 #ifdef CONFIG_RFS_ACCEL
619 .ndo_rx_flow_steer = efx_filter_rfs,
621 .ndo_udp_tunnel_add = udp_tunnel_nic_add_port,
622 .ndo_udp_tunnel_del = udp_tunnel_nic_del_port,
623 .ndo_xdp_xmit = efx_xdp_xmit,
627 static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog)
629 struct bpf_prog *old_prog;
631 if (efx->xdp_rxq_info_failed) {
632 netif_err(efx, drv, efx->net_dev,
633 "Unable to bind XDP program due to previous failure of rxq_info\n");
637 if (prog && efx->net_dev->mtu > efx_xdp_max_mtu(efx)) {
638 netif_err(efx, drv, efx->net_dev,
639 "Unable to configure XDP with MTU of %d (max: %d)\n",
640 efx->net_dev->mtu, efx_xdp_max_mtu(efx));
644 old_prog = rtnl_dereference(efx->xdp_prog);
645 rcu_assign_pointer(efx->xdp_prog, prog);
646 /* Release the reference that was originally passed by the caller. */
648 bpf_prog_put(old_prog);
653 /* Context: process, rtnl_lock() held. */
654 static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp)
656 struct efx_nic *efx = netdev_priv(dev);
658 switch (xdp->command) {
660 return efx_xdp_setup_prog(efx, xdp->prog);
666 static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
669 struct efx_nic *efx = netdev_priv(dev);
671 if (!netif_running(dev))
674 return efx_xdp_tx_buffers(efx, n, xdpfs, flags & XDP_XMIT_FLUSH);
677 static void efx_update_name(struct efx_nic *efx)
679 strcpy(efx->name, efx->net_dev->name);
681 efx_set_channel_names(efx);
684 static int efx_netdev_event(struct notifier_block *this,
685 unsigned long event, void *ptr)
687 struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
689 if ((net_dev->netdev_ops == &efx_netdev_ops) &&
690 event == NETDEV_CHANGENAME)
691 efx_update_name(netdev_priv(net_dev));
696 static struct notifier_block efx_netdev_notifier = {
697 .notifier_call = efx_netdev_event,
701 show_phy_type(struct device *dev, struct device_attribute *attr, char *buf)
703 struct efx_nic *efx = dev_get_drvdata(dev);
704 return sprintf(buf, "%d\n", efx->phy_type);
706 static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL);
708 static int efx_register_netdev(struct efx_nic *efx)
710 struct net_device *net_dev = efx->net_dev;
711 struct efx_channel *channel;
714 net_dev->watchdog_timeo = 5 * HZ;
715 net_dev->irq = efx->pci_dev->irq;
716 net_dev->netdev_ops = &efx_netdev_ops;
717 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)
718 net_dev->priv_flags |= IFF_UNICAST_FLT;
719 net_dev->ethtool_ops = &efx_ethtool_ops;
720 net_dev->gso_max_segs = EFX_TSO_MAX_SEGS;
721 net_dev->min_mtu = EFX_MIN_MTU;
722 net_dev->max_mtu = EFX_MAX_MTU;
726 /* Enable resets to be scheduled and check whether any were
727 * already requested. If so, the NIC is probably hosed so we
730 efx->state = STATE_READY;
731 smp_mb(); /* ensure we change state before checking reset_pending */
732 if (efx->reset_pending) {
733 netif_err(efx, probe, efx->net_dev,
734 "aborting probe due to scheduled reset\n");
739 rc = dev_alloc_name(net_dev, net_dev->name);
742 efx_update_name(efx);
744 /* Always start with carrier off; PHY events will detect the link */
745 netif_carrier_off(net_dev);
747 rc = register_netdevice(net_dev);
751 efx_for_each_channel(channel, efx) {
752 struct efx_tx_queue *tx_queue;
753 efx_for_each_channel_tx_queue(tx_queue, channel)
754 efx_init_tx_queue_core_txq(tx_queue);
761 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
763 netif_err(efx, drv, efx->net_dev,
764 "failed to init net dev attributes\n");
765 goto fail_registered;
768 efx_init_mcdi_logging(efx);
775 unregister_netdevice(net_dev);
777 efx->state = STATE_UNINIT;
779 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
783 static void efx_unregister_netdev(struct efx_nic *efx)
788 BUG_ON(netdev_priv(efx->net_dev) != efx);
790 if (efx_dev_registered(efx)) {
791 strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
792 efx_fini_mcdi_logging(efx);
793 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
794 unregister_netdev(efx->net_dev);
798 /**************************************************************************
800 * List of NICs we support
802 **************************************************************************/
804 /* PCI device ID table */
805 static const struct pci_device_id efx_pci_table[] = {
806 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */
807 .driver_data = (unsigned long) &siena_a0_nic_type},
808 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */
809 .driver_data = (unsigned long) &siena_a0_nic_type},
810 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */
811 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
812 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */
813 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
814 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */
815 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
816 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */
817 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
818 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */
819 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
820 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */
821 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
822 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0b03), /* SFC9250 PF */
823 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
824 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1b03), /* SFC9250 VF */
825 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
826 {0} /* end of list */
829 /**************************************************************************
833 **************************************************************************/
835 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats)
837 u64 n_rx_nodesc_trunc = 0;
838 struct efx_channel *channel;
840 efx_for_each_channel(channel, efx)
841 n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;
842 stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;
843 stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);
846 /**************************************************************************
850 **************************************************************************/
852 /* Main body of final NIC shutdown code
853 * This is called only at module unload (or hotplug removal).
855 static void efx_pci_remove_main(struct efx_nic *efx)
857 /* Flush reset_work. It can no longer be scheduled since we
860 BUG_ON(efx->state == STATE_READY);
861 efx_flush_reset_workqueue(efx);
863 efx_disable_interrupts(efx);
864 efx_clear_interrupt_affinity(efx);
865 efx_nic_fini_interrupt(efx);
867 efx->type->fini(efx);
872 /* Final NIC shutdown
873 * This is called only at module unload (or hotplug removal). A PF can call
874 * this on its VFs to ensure they are unbound first.
876 static void efx_pci_remove(struct pci_dev *pci_dev)
880 efx = pci_get_drvdata(pci_dev);
884 /* Mark the NIC as fini, then stop the interface */
887 dev_close(efx->net_dev);
888 efx_disable_interrupts(efx);
889 efx->state = STATE_UNINIT;
892 if (efx->type->sriov_fini)
893 efx->type->sriov_fini(efx);
895 efx_unregister_netdev(efx);
899 efx_pci_remove_main(efx);
902 netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
904 efx_fini_struct(efx);
905 free_netdev(efx->net_dev);
907 pci_disable_pcie_error_reporting(pci_dev);
910 /* NIC VPD information
911 * Called during probe to display the part number of the
912 * installed NIC. VPD is potentially very large but this should
913 * always appear within the first 512 bytes.
915 #define SFC_VPD_LEN 512
916 static void efx_probe_vpd_strings(struct efx_nic *efx)
918 struct pci_dev *dev = efx->pci_dev;
919 char vpd_data[SFC_VPD_LEN];
921 int ro_start, ro_size, i, j;
923 /* Get the vpd data from the device */
924 vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data);
926 netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n");
930 /* Get the Read only section */
931 ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA);
933 netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n");
937 ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]);
939 i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
940 if (i + j > vpd_size)
943 /* Get the Part number */
944 i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN");
946 netif_err(efx, drv, efx->net_dev, "Part number not found\n");
950 j = pci_vpd_info_field_size(&vpd_data[i]);
951 i += PCI_VPD_INFO_FLD_HDR_SIZE;
952 if (i + j > vpd_size) {
953 netif_err(efx, drv, efx->net_dev, "Incomplete part number\n");
957 netif_info(efx, drv, efx->net_dev,
958 "Part Number : %.*s\n", j, &vpd_data[i]);
960 i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
962 i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN");
964 netif_err(efx, drv, efx->net_dev, "Serial number not found\n");
968 j = pci_vpd_info_field_size(&vpd_data[i]);
969 i += PCI_VPD_INFO_FLD_HDR_SIZE;
970 if (i + j > vpd_size) {
971 netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n");
975 efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL);
979 snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]);
983 /* Main body of NIC initialisation
984 * This is called at module load (or hotplug insertion, theoretically).
986 static int efx_pci_probe_main(struct efx_nic *efx)
990 /* Do start-of-day initialisation */
991 rc = efx_probe_all(efx);
997 down_write(&efx->filter_sem);
998 rc = efx->type->init(efx);
999 up_write(&efx->filter_sem);
1001 netif_err(efx, probe, efx->net_dev,
1002 "failed to initialise NIC\n");
1006 rc = efx_init_port(efx);
1008 netif_err(efx, probe, efx->net_dev,
1009 "failed to initialise port\n");
1013 rc = efx_nic_init_interrupt(efx);
1017 efx_set_interrupt_affinity(efx);
1018 rc = efx_enable_interrupts(efx);
1025 efx_clear_interrupt_affinity(efx);
1026 efx_nic_fini_interrupt(efx);
1030 efx->type->fini(efx);
1033 efx_remove_all(efx);
1038 static int efx_pci_probe_post_io(struct efx_nic *efx)
1040 struct net_device *net_dev = efx->net_dev;
1041 int rc = efx_pci_probe_main(efx);
1046 if (efx->type->sriov_init) {
1047 rc = efx->type->sriov_init(efx);
1049 netif_err(efx, probe, efx->net_dev,
1050 "SR-IOV can't be enabled rc %d\n", rc);
1053 /* Determine netdevice features */
1054 net_dev->features |= (efx->type->offload_features | NETIF_F_SG |
1055 NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_RXALL);
1056 if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM))
1057 net_dev->features |= NETIF_F_TSO6;
1058 /* Check whether device supports TSO */
1059 if (!efx->type->tso_versions || !efx->type->tso_versions(efx))
1060 net_dev->features &= ~NETIF_F_ALL_TSO;
1061 /* Mask for features that also apply to VLAN devices */
1062 net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG |
1063 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |
1066 net_dev->hw_features |= net_dev->features & ~efx->fixed_features;
1068 /* Disable receiving frames with bad FCS, by default. */
1069 net_dev->features &= ~NETIF_F_RXALL;
1071 /* Disable VLAN filtering by default. It may be enforced if
1072 * the feature is fixed (i.e. VLAN filters are required to
1073 * receive VLAN tagged packets due to vPort restrictions).
1075 net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
1076 net_dev->features |= efx->fixed_features;
1078 rc = efx_register_netdev(efx);
1082 efx_pci_remove_main(efx);
1086 /* NIC initialisation
1088 * This is called at module load (or hotplug insertion,
1089 * theoretically). It sets up PCI mappings, resets the NIC,
1090 * sets up and registers the network devices with the kernel and hooks
1091 * the interrupt service routine. It does not prepare the device for
1092 * transmission; this is left to the first time one of the network
1093 * interfaces is brought up (i.e. efx_net_open).
1095 static int efx_pci_probe(struct pci_dev *pci_dev,
1096 const struct pci_device_id *entry)
1098 struct net_device *net_dev;
1099 struct efx_nic *efx;
1102 /* Allocate and initialise a struct net_device and struct efx_nic */
1103 net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES,
1107 efx = netdev_priv(net_dev);
1108 efx->type = (const struct efx_nic_type *) entry->driver_data;
1109 efx->fixed_features |= NETIF_F_HIGHDMA;
1111 pci_set_drvdata(pci_dev, efx);
1112 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
1113 rc = efx_init_struct(efx, pci_dev, net_dev);
1117 netif_info(efx, probe, efx->net_dev,
1118 "Solarflare NIC detected\n");
1120 if (!efx->type->is_vf)
1121 efx_probe_vpd_strings(efx);
1123 /* Set up basic I/O (BAR mappings etc) */
1124 rc = efx_init_io(efx, efx->type->mem_bar(efx), efx->type->max_dma_mask,
1125 efx->type->mem_map_size(efx));
1129 rc = efx_pci_probe_post_io(efx);
1131 /* On failure, retry once immediately.
1132 * If we aborted probe due to a scheduled reset, dismiss it.
1134 efx->reset_pending = 0;
1135 rc = efx_pci_probe_post_io(efx);
1137 /* On another failure, retry once more
1138 * after a 50-305ms delay.
1142 get_random_bytes(&r, 1);
1143 msleep((unsigned int)r + 50);
1144 efx->reset_pending = 0;
1145 rc = efx_pci_probe_post_io(efx);
1151 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
1153 /* Try to create MTDs, but allow this to fail */
1155 rc = efx_mtd_probe(efx);
1157 if (rc && rc != -EPERM)
1158 netif_warn(efx, probe, efx->net_dev,
1159 "failed to create MTDs (%d)\n", rc);
1161 (void)pci_enable_pcie_error_reporting(pci_dev);
1163 if (efx->type->udp_tnl_push_ports)
1164 efx->type->udp_tnl_push_ports(efx);
1171 efx_fini_struct(efx);
1174 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
1175 free_netdev(net_dev);
1179 /* efx_pci_sriov_configure returns the actual number of Virtual Functions
1180 * enabled on success
1182 #ifdef CONFIG_SFC_SRIOV
1183 static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs)
1186 struct efx_nic *efx = pci_get_drvdata(dev);
1188 if (efx->type->sriov_configure) {
1189 rc = efx->type->sriov_configure(efx, num_vfs);
1199 static int efx_pm_freeze(struct device *dev)
1201 struct efx_nic *efx = dev_get_drvdata(dev);
1205 if (efx->state != STATE_DISABLED) {
1206 efx->state = STATE_UNINIT;
1208 efx_device_detach_sync(efx);
1211 efx_disable_interrupts(efx);
1219 static int efx_pm_thaw(struct device *dev)
1222 struct efx_nic *efx = dev_get_drvdata(dev);
1226 if (efx->state != STATE_DISABLED) {
1227 rc = efx_enable_interrupts(efx);
1231 mutex_lock(&efx->mac_lock);
1232 efx->phy_op->reconfigure(efx);
1233 mutex_unlock(&efx->mac_lock);
1237 efx_device_attach_if_not_resetting(efx);
1239 efx->state = STATE_READY;
1241 efx->type->resume_wol(efx);
1246 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
1247 efx_queue_reset_work(efx);
1257 static int efx_pm_poweroff(struct device *dev)
1259 struct pci_dev *pci_dev = to_pci_dev(dev);
1260 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1262 efx->type->fini(efx);
1264 efx->reset_pending = 0;
1266 pci_save_state(pci_dev);
1267 return pci_set_power_state(pci_dev, PCI_D3hot);
1270 /* Used for both resume and restore */
1271 static int efx_pm_resume(struct device *dev)
1273 struct pci_dev *pci_dev = to_pci_dev(dev);
1274 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1277 rc = pci_set_power_state(pci_dev, PCI_D0);
1280 pci_restore_state(pci_dev);
1281 rc = pci_enable_device(pci_dev);
1284 pci_set_master(efx->pci_dev);
1285 rc = efx->type->reset(efx, RESET_TYPE_ALL);
1288 down_write(&efx->filter_sem);
1289 rc = efx->type->init(efx);
1290 up_write(&efx->filter_sem);
1293 rc = efx_pm_thaw(dev);
1297 static int efx_pm_suspend(struct device *dev)
1302 rc = efx_pm_poweroff(dev);
1308 static const struct dev_pm_ops efx_pm_ops = {
1309 .suspend = efx_pm_suspend,
1310 .resume = efx_pm_resume,
1311 .freeze = efx_pm_freeze,
1312 .thaw = efx_pm_thaw,
1313 .poweroff = efx_pm_poweroff,
1314 .restore = efx_pm_resume,
1317 static struct pci_driver efx_pci_driver = {
1318 .name = KBUILD_MODNAME,
1319 .id_table = efx_pci_table,
1320 .probe = efx_pci_probe,
1321 .remove = efx_pci_remove,
1322 .driver.pm = &efx_pm_ops,
1323 .err_handler = &efx_err_handlers,
1324 #ifdef CONFIG_SFC_SRIOV
1325 .sriov_configure = efx_pci_sriov_configure,
1329 /**************************************************************************
1331 * Kernel module interface
1333 *************************************************************************/
1335 static int __init efx_init_module(void)
1339 printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n");
1341 rc = register_netdevice_notifier(&efx_netdev_notifier);
1345 #ifdef CONFIG_SFC_SRIOV
1346 rc = efx_init_sriov();
1351 rc = efx_create_reset_workqueue();
1355 rc = pci_register_driver(&efx_pci_driver);
1359 rc = pci_register_driver(&ef100_pci_driver);
1366 pci_unregister_driver(&efx_pci_driver);
1368 efx_destroy_reset_workqueue();
1370 #ifdef CONFIG_SFC_SRIOV
1374 unregister_netdevice_notifier(&efx_netdev_notifier);
1379 static void __exit efx_exit_module(void)
1381 printk(KERN_INFO "Solarflare NET driver unloading\n");
1383 pci_unregister_driver(&ef100_pci_driver);
1384 pci_unregister_driver(&efx_pci_driver);
1385 efx_destroy_reset_workqueue();
1386 #ifdef CONFIG_SFC_SRIOV
1389 unregister_netdevice_notifier(&efx_netdev_notifier);
1393 module_init(efx_init_module);
1394 module_exit(efx_exit_module);
1396 MODULE_AUTHOR("Solarflare Communications and "
1398 MODULE_DESCRIPTION("Solarflare network driver");
1399 MODULE_LICENSE("GPL");
1400 MODULE_DEVICE_TABLE(pci, efx_pci_table);
1401 MODULE_VERSION(EFX_DRIVER_VERSION);