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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/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 values
44 *
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 events
56 *
57 * Set this to 1 to use separate channels for TX and RX. It allows us
58 * to control interrupt affinity separately for TX and RX.
59 *
60 * This is only used in MSI-X interrupt mode
61 */
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 after
68 * module load with ethtool.
69 *
70 * The default for RX should strike a balance between increasing the
71 * 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 after
76 * module load with ethtool.
77 *
78 * This default is chosen to ensure that a 10G link does not go idle
79 * while a TX queue is stopped after it has become full. A queue is
80 * restarted when it drops below half full. The time this takes (assuming
81 * worst case 3 descriptors per packet and 1024 descriptors) is
82 * 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 prototypes
100 *
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 handling
112 *
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 handling
183 *
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 trying
278 * 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);
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/shutdown
329 *
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_SRIOV
355 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#endif
361
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_SRIOV
381 efx->type->vswitching_remove(efx);
382#endif
383 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_SRIOV
400 efx->type->vswitching_remove(efx);
401#endif
402 efx_remove_port(efx);
403 efx_remove_nic(efx);
404}
405
406/**************************************************************************
407 *
408 * Interrupt moderation
409 *
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 microseconds
423 * 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 IRQ
471 * moderation. Otherwise, IRQ moderation is the same for all
472 * 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 * ioctls
487 *
488 *************************************************************************/
489
490/* Net device ioctl
491 * 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 interface
509 *
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 else
537 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 method
544 * 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 else
566 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 else
576 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_SRIOV
614 .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#endif
620 .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_ACCEL
623 .ndo_rx_flow_steer = efx_filter_rfs,
624#endif
625 .ndo_xdp_xmit = efx_xdp_xmit,
626 .ndo_bpf = efx_xdp
627};
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 were
729 * already requested. If so, the NIC is probably hosed so we
730 * 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 support
803 *
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 {0} /* end of list */
825};
826
827/**************************************************************************
828 *
829 * Data housekeeping
830 *
831 **************************************************************************/
832
833void efx_update_sw_stats(struct efx_nic *efx, u64 *stats)
834{
835 u64 n_rx_nodesc_trunc = 0;
836 struct efx_channel *channel;
837
838 efx_for_each_channel(channel, efx)
839 n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;
840 stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;
841 stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);
842}
843
844/**************************************************************************
845 *
846 * PCI interface
847 *
848 **************************************************************************/
849
850/* Main body of final NIC shutdown code
851 * This is called only at module unload (or hotplug removal).
852 */
853static void efx_pci_remove_main(struct efx_nic *efx)
854{
855 /* Flush reset_work. It can no longer be scheduled since we
856 * are not READY.
857 */
858 WARN_ON(efx_net_active(efx->state));
859 efx_flush_reset_workqueue(efx);
860
861 efx_disable_interrupts(efx);
862 efx_clear_interrupt_affinity(efx);
863 efx_nic_fini_interrupt(efx);
864 efx_fini_port(efx);
865 efx->type->fini(efx);
866 efx_fini_napi(efx);
867 efx_remove_all(efx);
868}
869
870/* Final NIC shutdown
871 * This is called only at module unload (or hotplug removal). A PF can call
872 * this on its VFs to ensure they are unbound first.
873 */
874static void efx_pci_remove(struct pci_dev *pci_dev)
875{
876 struct efx_probe_data *probe_data;
877 struct efx_nic *efx;
878
879 efx = pci_get_drvdata(pci_dev);
880 if (!efx)
881 return;
882
883 /* Mark the NIC as fini, then stop the interface */
884 rtnl_lock();
885 efx_dissociate(efx);
886 dev_close(efx->net_dev);
887 efx_disable_interrupts(efx);
888 efx->state = STATE_UNINIT;
889 rtnl_unlock();
890
891 if (efx->type->sriov_fini)
892 efx->type->sriov_fini(efx);
893
894 efx_fini_devlink_lock(efx);
895 efx_unregister_netdev(efx);
896
897 efx_mtd_remove(efx);
898
899 efx_pci_remove_main(efx);
900
901 efx_fini_io(efx);
902 pci_dbg(efx->pci_dev, "shutdown successful\n");
903
904 efx_fini_devlink_and_unlock(efx);
905 efx_fini_struct(efx);
906 free_netdev(efx->net_dev);
907 probe_data = container_of(efx, struct efx_probe_data, efx);
908 kfree(probe_data);
909};
910
911/* NIC VPD information
912 * Called during probe to display the part number of the
913 * installed NIC.
914 */
915static void efx_probe_vpd_strings(struct efx_nic *efx)
916{
917 struct pci_dev *dev = efx->pci_dev;
918 unsigned int vpd_size, kw_len;
919 u8 *vpd_data;
920 int start;
921
922 vpd_data = pci_vpd_alloc(dev, &vpd_size);
923 if (IS_ERR(vpd_data)) {
924 pci_warn(dev, "Unable to read VPD\n");
925 return;
926 }
927
928 start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
929 PCI_VPD_RO_KEYWORD_PARTNO, &kw_len);
930 if (start < 0)
931 pci_err(dev, "Part number not found or incomplete\n");
932 else
933 pci_info(dev, "Part Number : %.*s\n", kw_len, vpd_data + start);
934
935 start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
936 PCI_VPD_RO_KEYWORD_SERIALNO, &kw_len);
937 if (start < 0)
938 pci_err(dev, "Serial number not found or incomplete\n");
939 else
940 efx->vpd_sn = kmemdup_nul(vpd_data + start, kw_len, GFP_KERNEL);
941
942 kfree(vpd_data);
943}
944
945
946/* Main body of NIC initialisation
947 * This is called at module load (or hotplug insertion, theoretically).
948 */
949static int efx_pci_probe_main(struct efx_nic *efx)
950{
951 int rc;
952
953 /* Do start-of-day initialisation */
954 rc = efx_probe_all(efx);
955 if (rc)
956 goto fail1;
957
958 efx_init_napi(efx);
959
960 down_write(&efx->filter_sem);
961 rc = efx->type->init(efx);
962 up_write(&efx->filter_sem);
963 if (rc) {
964 pci_err(efx->pci_dev, "failed to initialise NIC\n");
965 goto fail3;
966 }
967
968 rc = efx_init_port(efx);
969 if (rc) {
970 netif_err(efx, probe, efx->net_dev,
971 "failed to initialise port\n");
972 goto fail4;
973 }
974
975 rc = efx_nic_init_interrupt(efx);
976 if (rc)
977 goto fail5;
978
979 efx_set_interrupt_affinity(efx);
980 rc = efx_enable_interrupts(efx);
981 if (rc)
982 goto fail6;
983
984 return 0;
985
986 fail6:
987 efx_clear_interrupt_affinity(efx);
988 efx_nic_fini_interrupt(efx);
989 fail5:
990 efx_fini_port(efx);
991 fail4:
992 efx->type->fini(efx);
993 fail3:
994 efx_fini_napi(efx);
995 efx_remove_all(efx);
996 fail1:
997 return rc;
998}
999
1000static int efx_pci_probe_post_io(struct efx_nic *efx)
1001{
1002 struct net_device *net_dev = efx->net_dev;
1003 int rc = efx_pci_probe_main(efx);
1004
1005 if (rc)
1006 return rc;
1007
1008 if (efx->type->sriov_init) {
1009 rc = efx->type->sriov_init(efx);
1010 if (rc)
1011 pci_err(efx->pci_dev, "SR-IOV can't be enabled rc %d\n",
1012 rc);
1013 }
1014
1015 /* Determine netdevice features */
1016 net_dev->features |= efx->type->offload_features;
1017
1018 /* Add TSO features */
1019 if (efx->type->tso_versions && efx->type->tso_versions(efx))
1020 net_dev->features |= NETIF_F_TSO | NETIF_F_TSO6;
1021
1022 /* Mask for features that also apply to VLAN devices */
1023 net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG |
1024 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |
1025 NETIF_F_RXCSUM);
1026
1027 /* Determine user configurable features */
1028 net_dev->hw_features |= net_dev->features & ~efx->fixed_features;
1029
1030 /* Disable receiving frames with bad FCS, by default. */
1031 net_dev->features &= ~NETIF_F_RXALL;
1032
1033 /* Disable VLAN filtering by default. It may be enforced if
1034 * the feature is fixed (i.e. VLAN filters are required to
1035 * receive VLAN tagged packets due to vPort restrictions).
1036 */
1037 net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
1038 net_dev->features |= efx->fixed_features;
1039
1040 net_dev->xdp_features = NETDEV_XDP_ACT_BASIC |
1041 NETDEV_XDP_ACT_REDIRECT |
1042 NETDEV_XDP_ACT_NDO_XMIT;
1043
1044 /* devlink creation, registration and lock */
1045 rc = efx_probe_devlink_and_lock(efx);
1046 if (rc)
1047 pci_err(efx->pci_dev, "devlink registration failed");
1048
1049 rc = efx_register_netdev(efx);
1050 efx_probe_devlink_unlock(efx);
1051 if (!rc)
1052 return 0;
1053
1054 efx_pci_remove_main(efx);
1055 return rc;
1056}
1057
1058/* NIC initialisation
1059 *
1060 * This is called at module load (or hotplug insertion,
1061 * theoretically). It sets up PCI mappings, resets the NIC,
1062 * sets up and registers the network devices with the kernel and hooks
1063 * the interrupt service routine. It does not prepare the device for
1064 * transmission; this is left to the first time one of the network
1065 * interfaces is brought up (i.e. efx_net_open).
1066 */
1067static int efx_pci_probe(struct pci_dev *pci_dev,
1068 const struct pci_device_id *entry)
1069{
1070 struct efx_probe_data *probe_data, **probe_ptr;
1071 struct net_device *net_dev;
1072 struct efx_nic *efx;
1073 int rc;
1074
1075 /* Allocate probe data and struct efx_nic */
1076 probe_data = kzalloc(sizeof(*probe_data), GFP_KERNEL);
1077 if (!probe_data)
1078 return -ENOMEM;
1079 probe_data->pci_dev = pci_dev;
1080 efx = &probe_data->efx;
1081
1082 /* Allocate and initialise a struct net_device */
1083 net_dev = alloc_etherdev_mq(sizeof(probe_data), EFX_MAX_CORE_TX_QUEUES);
1084 if (!net_dev) {
1085 rc = -ENOMEM;
1086 goto fail0;
1087 }
1088 probe_ptr = netdev_priv(net_dev);
1089 *probe_ptr = probe_data;
1090 efx->net_dev = net_dev;
1091 efx->type = (const struct efx_nic_type *) entry->driver_data;
1092 efx->fixed_features |= NETIF_F_HIGHDMA;
1093
1094 pci_set_drvdata(pci_dev, efx);
1095 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
1096 rc = efx_init_struct(efx, pci_dev);
1097 if (rc)
1098 goto fail1;
1099 efx->mdio.dev = net_dev;
1100
1101 pci_info(pci_dev, "Solarflare NIC detected\n");
1102
1103 if (!efx->type->is_vf)
1104 efx_probe_vpd_strings(efx);
1105
1106 /* Set up basic I/O (BAR mappings etc) */
1107 rc = efx_init_io(efx, efx->type->mem_bar(efx), efx->type->max_dma_mask,
1108 efx->type->mem_map_size(efx));
1109 if (rc)
1110 goto fail2;
1111
1112 rc = efx_pci_probe_post_io(efx);
1113 if (rc) {
1114 /* On failure, retry once immediately.
1115 * If we aborted probe due to a scheduled reset, dismiss it.
1116 */
1117 efx->reset_pending = 0;
1118 rc = efx_pci_probe_post_io(efx);
1119 if (rc) {
1120 /* On another failure, retry once more
1121 * after a 50-305ms delay.
1122 */
1123 unsigned char r;
1124
1125 get_random_bytes(&r, 1);
1126 msleep((unsigned int)r + 50);
1127 efx->reset_pending = 0;
1128 rc = efx_pci_probe_post_io(efx);
1129 }
1130 }
1131 if (rc)
1132 goto fail3;
1133
1134 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
1135
1136 /* Try to create MTDs, but allow this to fail */
1137 rtnl_lock();
1138 rc = efx_mtd_probe(efx);
1139 rtnl_unlock();
1140 if (rc && rc != -EPERM)
1141 netif_warn(efx, probe, efx->net_dev,
1142 "failed to create MTDs (%d)\n", rc);
1143
1144 if (efx->type->udp_tnl_push_ports)
1145 efx->type->udp_tnl_push_ports(efx);
1146
1147 return 0;
1148
1149 fail3:
1150 efx_fini_io(efx);
1151 fail2:
1152 efx_fini_struct(efx);
1153 fail1:
1154 WARN_ON(rc > 0);
1155 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
1156 free_netdev(net_dev);
1157 fail0:
1158 kfree(probe_data);
1159 return rc;
1160}
1161
1162/* efx_pci_sriov_configure returns the actual number of Virtual Functions
1163 * enabled on success
1164 */
1165#ifdef CONFIG_SFC_SRIOV
1166static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs)
1167{
1168 int rc;
1169 struct efx_nic *efx = pci_get_drvdata(dev);
1170
1171 if (efx->type->sriov_configure) {
1172 rc = efx->type->sriov_configure(efx, num_vfs);
1173 if (rc)
1174 return rc;
1175 else
1176 return num_vfs;
1177 } else
1178 return -EOPNOTSUPP;
1179}
1180#endif
1181
1182static int efx_pm_freeze(struct device *dev)
1183{
1184 struct efx_nic *efx = dev_get_drvdata(dev);
1185
1186 rtnl_lock();
1187
1188 if (efx_net_active(efx->state)) {
1189 efx_device_detach_sync(efx);
1190
1191 efx_stop_all(efx);
1192 efx_disable_interrupts(efx);
1193
1194 efx->state = efx_freeze(efx->state);
1195 }
1196
1197 rtnl_unlock();
1198
1199 return 0;
1200}
1201
1202static void efx_pci_shutdown(struct pci_dev *pci_dev)
1203{
1204 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1205
1206 if (!efx)
1207 return;
1208
1209 efx_pm_freeze(&pci_dev->dev);
1210 pci_disable_device(pci_dev);
1211}
1212
1213static int efx_pm_thaw(struct device *dev)
1214{
1215 int rc;
1216 struct efx_nic *efx = dev_get_drvdata(dev);
1217
1218 rtnl_lock();
1219
1220 if (efx_frozen(efx->state)) {
1221 rc = efx_enable_interrupts(efx);
1222 if (rc)
1223 goto fail;
1224
1225 mutex_lock(&efx->mac_lock);
1226 efx_mcdi_port_reconfigure(efx);
1227 mutex_unlock(&efx->mac_lock);
1228
1229 efx_start_all(efx);
1230
1231 efx_device_attach_if_not_resetting(efx);
1232
1233 efx->state = efx_thaw(efx->state);
1234
1235 efx->type->resume_wol(efx);
1236 }
1237
1238 rtnl_unlock();
1239
1240 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
1241 efx_queue_reset_work(efx);
1242
1243 return 0;
1244
1245fail:
1246 rtnl_unlock();
1247
1248 return rc;
1249}
1250
1251static int efx_pm_poweroff(struct device *dev)
1252{
1253 struct pci_dev *pci_dev = to_pci_dev(dev);
1254 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1255
1256 efx->type->fini(efx);
1257
1258 efx->reset_pending = 0;
1259
1260 pci_save_state(pci_dev);
1261 return pci_set_power_state(pci_dev, PCI_D3hot);
1262}
1263
1264/* Used for both resume and restore */
1265static int efx_pm_resume(struct device *dev)
1266{
1267 struct pci_dev *pci_dev = to_pci_dev(dev);
1268 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1269 int rc;
1270
1271 rc = pci_set_power_state(pci_dev, PCI_D0);
1272 if (rc)
1273 return rc;
1274 pci_restore_state(pci_dev);
1275 rc = pci_enable_device(pci_dev);
1276 if (rc)
1277 return rc;
1278 pci_set_master(efx->pci_dev);
1279 rc = efx->type->reset(efx, RESET_TYPE_ALL);
1280 if (rc)
1281 return rc;
1282 down_write(&efx->filter_sem);
1283 rc = efx->type->init(efx);
1284 up_write(&efx->filter_sem);
1285 if (rc)
1286 return rc;
1287 rc = efx_pm_thaw(dev);
1288 return rc;
1289}
1290
1291static int efx_pm_suspend(struct device *dev)
1292{
1293 int rc;
1294
1295 efx_pm_freeze(dev);
1296 rc = efx_pm_poweroff(dev);
1297 if (rc)
1298 efx_pm_resume(dev);
1299 return rc;
1300}
1301
1302static const struct dev_pm_ops efx_pm_ops = {
1303 .suspend = efx_pm_suspend,
1304 .resume = efx_pm_resume,
1305 .freeze = efx_pm_freeze,
1306 .thaw = efx_pm_thaw,
1307 .poweroff = efx_pm_poweroff,
1308 .restore = efx_pm_resume,
1309};
1310
1311static struct pci_driver efx_pci_driver = {
1312 .name = KBUILD_MODNAME,
1313 .id_table = efx_pci_table,
1314 .probe = efx_pci_probe,
1315 .remove = efx_pci_remove,
1316 .driver.pm = &efx_pm_ops,
1317 .shutdown = efx_pci_shutdown,
1318 .err_handler = &efx_err_handlers,
1319#ifdef CONFIG_SFC_SRIOV
1320 .sriov_configure = efx_pci_sriov_configure,
1321#endif
1322};
1323
1324/**************************************************************************
1325 *
1326 * Kernel module interface
1327 *
1328 *************************************************************************/
1329
1330static int __init efx_init_module(void)
1331{
1332 int rc;
1333
1334 printk(KERN_INFO "Solarflare NET driver\n");
1335
1336 rc = register_netdevice_notifier(&efx_netdev_notifier);
1337 if (rc)
1338 goto err_notifier;
1339
1340 rc = efx_create_reset_workqueue();
1341 if (rc)
1342 goto err_reset;
1343
1344 rc = pci_register_driver(&efx_pci_driver);
1345 if (rc < 0)
1346 goto err_pci;
1347
1348 rc = pci_register_driver(&ef100_pci_driver);
1349 if (rc < 0)
1350 goto err_pci_ef100;
1351
1352 return 0;
1353
1354 err_pci_ef100:
1355 pci_unregister_driver(&efx_pci_driver);
1356 err_pci:
1357 efx_destroy_reset_workqueue();
1358 err_reset:
1359 unregister_netdevice_notifier(&efx_netdev_notifier);
1360 err_notifier:
1361 return rc;
1362}
1363
1364static void __exit efx_exit_module(void)
1365{
1366 printk(KERN_INFO "Solarflare NET driver unloading\n");
1367
1368 pci_unregister_driver(&ef100_pci_driver);
1369 pci_unregister_driver(&efx_pci_driver);
1370 efx_destroy_reset_workqueue();
1371 unregister_netdevice_notifier(&efx_netdev_notifier);
1372
1373}
1374
1375module_init(efx_init_module);
1376module_exit(efx_exit_module);
1377
1378MODULE_AUTHOR("Solarflare Communications and "
1379 "Michael Brown <mbrown@fensystems.co.uk>");
1380MODULE_DESCRIPTION("Solarflare network driver");
1381MODULE_LICENSE("GPL");
1382MODULE_DEVICE_TABLE(pci, efx_pci_table);
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#define EFX_ASSERT_RESET_SERIALISED(efx) \
109 do { \
110 if ((efx->state == STATE_READY) || \
111 (efx->state == STATE_RECOVERY) || \
112 (efx->state == STATE_DISABLED)) \
113 ASSERT_RTNL(); \
114 } while (0)
115
116/**************************************************************************
117 *
118 * Port handling
119 *
120 **************************************************************************/
121
122static void efx_fini_port(struct efx_nic *efx);
123
124static int efx_probe_port(struct efx_nic *efx)
125{
126 int rc;
127
128 netif_dbg(efx, probe, efx->net_dev, "create port\n");
129
130 if (phy_flash_cfg)
131 efx->phy_mode = PHY_MODE_SPECIAL;
132
133 /* Connect up MAC/PHY operations table */
134 rc = efx->type->probe_port(efx);
135 if (rc)
136 return rc;
137
138 /* Initialise MAC address to permanent address */
139 ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr);
140
141 return 0;
142}
143
144static int efx_init_port(struct efx_nic *efx)
145{
146 int rc;
147
148 netif_dbg(efx, drv, efx->net_dev, "init port\n");
149
150 mutex_lock(&efx->mac_lock);
151
152 efx->port_initialized = true;
153
154 /* Ensure the PHY advertises the correct flow control settings */
155 rc = efx_mcdi_port_reconfigure(efx);
156 if (rc && rc != -EPERM)
157 goto fail;
158
159 mutex_unlock(&efx->mac_lock);
160 return 0;
161
162fail:
163 mutex_unlock(&efx->mac_lock);
164 return rc;
165}
166
167static void efx_fini_port(struct efx_nic *efx)
168{
169 netif_dbg(efx, drv, efx->net_dev, "shut down port\n");
170
171 if (!efx->port_initialized)
172 return;
173
174 efx->port_initialized = false;
175
176 efx->link_state.up = false;
177 efx_link_status_changed(efx);
178}
179
180static void efx_remove_port(struct efx_nic *efx)
181{
182 netif_dbg(efx, drv, efx->net_dev, "destroying port\n");
183
184 efx->type->remove_port(efx);
185}
186
187/**************************************************************************
188 *
189 * NIC handling
190 *
191 **************************************************************************/
192
193static LIST_HEAD(efx_primary_list);
194static LIST_HEAD(efx_unassociated_list);
195
196static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right)
197{
198 return left->type == right->type &&
199 left->vpd_sn && right->vpd_sn &&
200 !strcmp(left->vpd_sn, right->vpd_sn);
201}
202
203static void efx_associate(struct efx_nic *efx)
204{
205 struct efx_nic *other, *next;
206
207 if (efx->primary == efx) {
208 /* Adding primary function; look for secondaries */
209
210 netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n");
211 list_add_tail(&efx->node, &efx_primary_list);
212
213 list_for_each_entry_safe(other, next, &efx_unassociated_list,
214 node) {
215 if (efx_same_controller(efx, other)) {
216 list_del(&other->node);
217 netif_dbg(other, probe, other->net_dev,
218 "moving to secondary list of %s %s\n",
219 pci_name(efx->pci_dev),
220 efx->net_dev->name);
221 list_add_tail(&other->node,
222 &efx->secondary_list);
223 other->primary = efx;
224 }
225 }
226 } else {
227 /* Adding secondary function; look for primary */
228
229 list_for_each_entry(other, &efx_primary_list, node) {
230 if (efx_same_controller(efx, other)) {
231 netif_dbg(efx, probe, efx->net_dev,
232 "adding to secondary list of %s %s\n",
233 pci_name(other->pci_dev),
234 other->net_dev->name);
235 list_add_tail(&efx->node,
236 &other->secondary_list);
237 efx->primary = other;
238 return;
239 }
240 }
241
242 netif_dbg(efx, probe, efx->net_dev,
243 "adding to unassociated list\n");
244 list_add_tail(&efx->node, &efx_unassociated_list);
245 }
246}
247
248static void efx_dissociate(struct efx_nic *efx)
249{
250 struct efx_nic *other, *next;
251
252 list_del(&efx->node);
253 efx->primary = NULL;
254
255 list_for_each_entry_safe(other, next, &efx->secondary_list, node) {
256 list_del(&other->node);
257 netif_dbg(other, probe, other->net_dev,
258 "moving to unassociated list\n");
259 list_add_tail(&other->node, &efx_unassociated_list);
260 other->primary = NULL;
261 }
262}
263
264static int efx_probe_nic(struct efx_nic *efx)
265{
266 int rc;
267
268 netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
269
270 /* Carry out hardware-type specific initialisation */
271 rc = efx->type->probe(efx);
272 if (rc)
273 return rc;
274
275 do {
276 if (!efx->max_channels || !efx->max_tx_channels) {
277 netif_err(efx, drv, efx->net_dev,
278 "Insufficient resources to allocate"
279 " any channels\n");
280 rc = -ENOSPC;
281 goto fail1;
282 }
283
284 /* Determine the number of channels and queues by trying
285 * to hook in MSI-X interrupts.
286 */
287 rc = efx_probe_interrupts(efx);
288 if (rc)
289 goto fail1;
290
291 rc = efx_set_channels(efx);
292 if (rc)
293 goto fail1;
294
295 /* dimension_resources can fail with EAGAIN */
296 rc = efx->type->dimension_resources(efx);
297 if (rc != 0 && rc != -EAGAIN)
298 goto fail2;
299
300 if (rc == -EAGAIN)
301 /* try again with new max_channels */
302 efx_remove_interrupts(efx);
303
304 } while (rc == -EAGAIN);
305
306 if (efx->n_channels > 1)
307 netdev_rss_key_fill(efx->rss_context.rx_hash_key,
308 sizeof(efx->rss_context.rx_hash_key));
309 efx_set_default_rx_indir_table(efx, &efx->rss_context);
310
311 /* Initialise the interrupt moderation settings */
312 efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000);
313 efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true,
314 true);
315
316 return 0;
317
318fail2:
319 efx_remove_interrupts(efx);
320fail1:
321 efx->type->remove(efx);
322 return rc;
323}
324
325static void efx_remove_nic(struct efx_nic *efx)
326{
327 netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");
328
329 efx_remove_interrupts(efx);
330 efx->type->remove(efx);
331}
332
333/**************************************************************************
334 *
335 * NIC startup/shutdown
336 *
337 *************************************************************************/
338
339static int efx_probe_all(struct efx_nic *efx)
340{
341 int rc;
342
343 rc = efx_probe_nic(efx);
344 if (rc) {
345 netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
346 goto fail1;
347 }
348
349 rc = efx_probe_port(efx);
350 if (rc) {
351 netif_err(efx, probe, efx->net_dev, "failed to create port\n");
352 goto fail2;
353 }
354
355 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT);
356 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) {
357 rc = -EINVAL;
358 goto fail3;
359 }
360
361#ifdef CONFIG_SFC_SRIOV
362 rc = efx->type->vswitching_probe(efx);
363 if (rc) /* not fatal; the PF will still work fine */
364 netif_warn(efx, probe, efx->net_dev,
365 "failed to setup vswitching rc=%d;"
366 " VFs may not function\n", rc);
367#endif
368
369 rc = efx_probe_filters(efx);
370 if (rc) {
371 netif_err(efx, probe, efx->net_dev,
372 "failed to create filter tables\n");
373 goto fail4;
374 }
375
376 rc = efx_probe_channels(efx);
377 if (rc)
378 goto fail5;
379
380 return 0;
381
382 fail5:
383 efx_remove_filters(efx);
384 fail4:
385#ifdef CONFIG_SFC_SRIOV
386 efx->type->vswitching_remove(efx);
387#endif
388 fail3:
389 efx_remove_port(efx);
390 fail2:
391 efx_remove_nic(efx);
392 fail1:
393 return rc;
394}
395
396static void efx_remove_all(struct efx_nic *efx)
397{
398 rtnl_lock();
399 efx_xdp_setup_prog(efx, NULL);
400 rtnl_unlock();
401
402 efx_remove_channels(efx);
403 efx_remove_filters(efx);
404#ifdef CONFIG_SFC_SRIOV
405 efx->type->vswitching_remove(efx);
406#endif
407 efx_remove_port(efx);
408 efx_remove_nic(efx);
409}
410
411/**************************************************************************
412 *
413 * Interrupt moderation
414 *
415 **************************************************************************/
416unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs)
417{
418 if (usecs == 0)
419 return 0;
420 if (usecs * 1000 < efx->timer_quantum_ns)
421 return 1; /* never round down to 0 */
422 return usecs * 1000 / efx->timer_quantum_ns;
423}
424
425unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks)
426{
427 /* We must round up when converting ticks to microseconds
428 * because we round down when converting the other way.
429 */
430 return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000);
431}
432
433/* Set interrupt moderation parameters */
434int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
435 unsigned int rx_usecs, bool rx_adaptive,
436 bool rx_may_override_tx)
437{
438 struct efx_channel *channel;
439 unsigned int timer_max_us;
440
441 EFX_ASSERT_RESET_SERIALISED(efx);
442
443 timer_max_us = efx->timer_max_ns / 1000;
444
445 if (tx_usecs > timer_max_us || rx_usecs > timer_max_us)
446 return -EINVAL;
447
448 if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 &&
449 !rx_may_override_tx) {
450 netif_err(efx, drv, efx->net_dev, "Channels are shared. "
451 "RX and TX IRQ moderation must be equal\n");
452 return -EINVAL;
453 }
454
455 efx->irq_rx_adaptive = rx_adaptive;
456 efx->irq_rx_moderation_us = rx_usecs;
457 efx_for_each_channel(channel, efx) {
458 if (efx_channel_has_rx_queue(channel))
459 channel->irq_moderation_us = rx_usecs;
460 else if (efx_channel_has_tx_queues(channel))
461 channel->irq_moderation_us = tx_usecs;
462 else if (efx_channel_is_xdp_tx(channel))
463 channel->irq_moderation_us = tx_usecs;
464 }
465
466 return 0;
467}
468
469void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
470 unsigned int *rx_usecs, bool *rx_adaptive)
471{
472 *rx_adaptive = efx->irq_rx_adaptive;
473 *rx_usecs = efx->irq_rx_moderation_us;
474
475 /* If channels are shared between RX and TX, so is IRQ
476 * moderation. Otherwise, IRQ moderation is the same for all
477 * TX channels and is not adaptive.
478 */
479 if (efx->tx_channel_offset == 0) {
480 *tx_usecs = *rx_usecs;
481 } else {
482 struct efx_channel *tx_channel;
483
484 tx_channel = efx->channel[efx->tx_channel_offset];
485 *tx_usecs = tx_channel->irq_moderation_us;
486 }
487}
488
489/**************************************************************************
490 *
491 * ioctls
492 *
493 *************************************************************************/
494
495/* Net device ioctl
496 * Context: process, rtnl_lock() held.
497 */
498static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
499{
500 struct efx_nic *efx = netdev_priv(net_dev);
501 struct mii_ioctl_data *data = if_mii(ifr);
502
503 if (cmd == SIOCSHWTSTAMP)
504 return efx_ptp_set_ts_config(efx, ifr);
505 if (cmd == SIOCGHWTSTAMP)
506 return efx_ptp_get_ts_config(efx, ifr);
507
508 /* Convert phy_id from older PRTAD/DEVAD format */
509 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
510 (data->phy_id & 0xfc00) == 0x0400)
511 data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;
512
513 return mdio_mii_ioctl(&efx->mdio, data, cmd);
514}
515
516/**************************************************************************
517 *
518 * Kernel net device interface
519 *
520 *************************************************************************/
521
522/* Context: process, rtnl_lock() held. */
523int efx_net_open(struct net_device *net_dev)
524{
525 struct efx_nic *efx = netdev_priv(net_dev);
526 int rc;
527
528 netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
529 raw_smp_processor_id());
530
531 rc = efx_check_disabled(efx);
532 if (rc)
533 return rc;
534 if (efx->phy_mode & PHY_MODE_SPECIAL)
535 return -EBUSY;
536 if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
537 return -EIO;
538
539 /* Notify the kernel of the link state polled during driver load,
540 * before the monitor starts running */
541 efx_link_status_changed(efx);
542
543 efx_start_all(efx);
544 if (efx->state == STATE_DISABLED || efx->reset_pending)
545 netif_device_detach(efx->net_dev);
546 efx_selftest_async_start(efx);
547 return 0;
548}
549
550/* Context: process, rtnl_lock() held.
551 * Note that the kernel will ignore our return code; this method
552 * should really be a void.
553 */
554int efx_net_stop(struct net_device *net_dev)
555{
556 struct efx_nic *efx = netdev_priv(net_dev);
557
558 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
559 raw_smp_processor_id());
560
561 /* Stop the device and flush all the channels */
562 efx_stop_all(efx);
563
564 return 0;
565}
566
567static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid)
568{
569 struct efx_nic *efx = netdev_priv(net_dev);
570
571 if (efx->type->vlan_rx_add_vid)
572 return efx->type->vlan_rx_add_vid(efx, proto, vid);
573 else
574 return -EOPNOTSUPP;
575}
576
577static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid)
578{
579 struct efx_nic *efx = netdev_priv(net_dev);
580
581 if (efx->type->vlan_rx_kill_vid)
582 return efx->type->vlan_rx_kill_vid(efx, proto, vid);
583 else
584 return -EOPNOTSUPP;
585}
586
587static const struct net_device_ops efx_netdev_ops = {
588 .ndo_open = efx_net_open,
589 .ndo_stop = efx_net_stop,
590 .ndo_get_stats64 = efx_net_stats,
591 .ndo_tx_timeout = efx_watchdog,
592 .ndo_start_xmit = efx_hard_start_xmit,
593 .ndo_validate_addr = eth_validate_addr,
594 .ndo_do_ioctl = efx_ioctl,
595 .ndo_change_mtu = efx_change_mtu,
596 .ndo_set_mac_address = efx_set_mac_address,
597 .ndo_set_rx_mode = efx_set_rx_mode,
598 .ndo_set_features = efx_set_features,
599 .ndo_features_check = efx_features_check,
600 .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid,
601 .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid,
602#ifdef CONFIG_SFC_SRIOV
603 .ndo_set_vf_mac = efx_sriov_set_vf_mac,
604 .ndo_set_vf_vlan = efx_sriov_set_vf_vlan,
605 .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk,
606 .ndo_get_vf_config = efx_sriov_get_vf_config,
607 .ndo_set_vf_link_state = efx_sriov_set_vf_link_state,
608#endif
609 .ndo_get_phys_port_id = efx_get_phys_port_id,
610 .ndo_get_phys_port_name = efx_get_phys_port_name,
611 .ndo_setup_tc = efx_setup_tc,
612#ifdef CONFIG_RFS_ACCEL
613 .ndo_rx_flow_steer = efx_filter_rfs,
614#endif
615 .ndo_xdp_xmit = efx_xdp_xmit,
616 .ndo_bpf = efx_xdp
617};
618
619static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog)
620{
621 struct bpf_prog *old_prog;
622
623 if (efx->xdp_rxq_info_failed) {
624 netif_err(efx, drv, efx->net_dev,
625 "Unable to bind XDP program due to previous failure of rxq_info\n");
626 return -EINVAL;
627 }
628
629 if (prog && efx->net_dev->mtu > efx_xdp_max_mtu(efx)) {
630 netif_err(efx, drv, efx->net_dev,
631 "Unable to configure XDP with MTU of %d (max: %d)\n",
632 efx->net_dev->mtu, efx_xdp_max_mtu(efx));
633 return -EINVAL;
634 }
635
636 old_prog = rtnl_dereference(efx->xdp_prog);
637 rcu_assign_pointer(efx->xdp_prog, prog);
638 /* Release the reference that was originally passed by the caller. */
639 if (old_prog)
640 bpf_prog_put(old_prog);
641
642 return 0;
643}
644
645/* Context: process, rtnl_lock() held. */
646static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp)
647{
648 struct efx_nic *efx = netdev_priv(dev);
649
650 switch (xdp->command) {
651 case XDP_SETUP_PROG:
652 return efx_xdp_setup_prog(efx, xdp->prog);
653 default:
654 return -EINVAL;
655 }
656}
657
658static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
659 u32 flags)
660{
661 struct efx_nic *efx = netdev_priv(dev);
662
663 if (!netif_running(dev))
664 return -EINVAL;
665
666 return efx_xdp_tx_buffers(efx, n, xdpfs, flags & XDP_XMIT_FLUSH);
667}
668
669static void efx_update_name(struct efx_nic *efx)
670{
671 strcpy(efx->name, efx->net_dev->name);
672 efx_mtd_rename(efx);
673 efx_set_channel_names(efx);
674}
675
676static int efx_netdev_event(struct notifier_block *this,
677 unsigned long event, void *ptr)
678{
679 struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
680
681 if ((net_dev->netdev_ops == &efx_netdev_ops) &&
682 event == NETDEV_CHANGENAME)
683 efx_update_name(netdev_priv(net_dev));
684
685 return NOTIFY_DONE;
686}
687
688static struct notifier_block efx_netdev_notifier = {
689 .notifier_call = efx_netdev_event,
690};
691
692static ssize_t phy_type_show(struct device *dev,
693 struct device_attribute *attr, char *buf)
694{
695 struct efx_nic *efx = dev_get_drvdata(dev);
696 return sprintf(buf, "%d\n", efx->phy_type);
697}
698static DEVICE_ATTR_RO(phy_type);
699
700static int efx_register_netdev(struct efx_nic *efx)
701{
702 struct net_device *net_dev = efx->net_dev;
703 struct efx_channel *channel;
704 int rc;
705
706 net_dev->watchdog_timeo = 5 * HZ;
707 net_dev->irq = efx->pci_dev->irq;
708 net_dev->netdev_ops = &efx_netdev_ops;
709 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)
710 net_dev->priv_flags |= IFF_UNICAST_FLT;
711 net_dev->ethtool_ops = &efx_ethtool_ops;
712 net_dev->gso_max_segs = EFX_TSO_MAX_SEGS;
713 net_dev->min_mtu = EFX_MIN_MTU;
714 net_dev->max_mtu = EFX_MAX_MTU;
715
716 rtnl_lock();
717
718 /* Enable resets to be scheduled and check whether any were
719 * already requested. If so, the NIC is probably hosed so we
720 * abort.
721 */
722 efx->state = STATE_READY;
723 smp_mb(); /* ensure we change state before checking reset_pending */
724 if (efx->reset_pending) {
725 pci_err(efx->pci_dev, "aborting probe due to scheduled reset\n");
726 rc = -EIO;
727 goto fail_locked;
728 }
729
730 rc = dev_alloc_name(net_dev, net_dev->name);
731 if (rc < 0)
732 goto fail_locked;
733 efx_update_name(efx);
734
735 /* Always start with carrier off; PHY events will detect the link */
736 netif_carrier_off(net_dev);
737
738 rc = register_netdevice(net_dev);
739 if (rc)
740 goto fail_locked;
741
742 efx_for_each_channel(channel, efx) {
743 struct efx_tx_queue *tx_queue;
744 efx_for_each_channel_tx_queue(tx_queue, channel)
745 efx_init_tx_queue_core_txq(tx_queue);
746 }
747
748 efx_associate(efx);
749
750 rtnl_unlock();
751
752 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
753 if (rc) {
754 netif_err(efx, drv, efx->net_dev,
755 "failed to init net dev attributes\n");
756 goto fail_registered;
757 }
758
759 efx_init_mcdi_logging(efx);
760
761 return 0;
762
763fail_registered:
764 rtnl_lock();
765 efx_dissociate(efx);
766 unregister_netdevice(net_dev);
767fail_locked:
768 efx->state = STATE_UNINIT;
769 rtnl_unlock();
770 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
771 return rc;
772}
773
774static void efx_unregister_netdev(struct efx_nic *efx)
775{
776 if (!efx->net_dev)
777 return;
778
779 BUG_ON(netdev_priv(efx->net_dev) != efx);
780
781 if (efx_dev_registered(efx)) {
782 strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
783 efx_fini_mcdi_logging(efx);
784 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
785 unregister_netdev(efx->net_dev);
786 }
787}
788
789/**************************************************************************
790 *
791 * List of NICs we support
792 *
793 **************************************************************************/
794
795/* PCI device ID table */
796static const struct pci_device_id efx_pci_table[] = {
797 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */
798 .driver_data = (unsigned long) &siena_a0_nic_type},
799 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */
800 .driver_data = (unsigned long) &siena_a0_nic_type},
801 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */
802 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
803 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */
804 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
805 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */
806 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
807 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */
808 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
809 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */
810 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
811 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */
812 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
813 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0b03), /* SFC9250 PF */
814 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
815 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1b03), /* SFC9250 VF */
816 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
817 {0} /* end of list */
818};
819
820/**************************************************************************
821 *
822 * Data housekeeping
823 *
824 **************************************************************************/
825
826void efx_update_sw_stats(struct efx_nic *efx, u64 *stats)
827{
828 u64 n_rx_nodesc_trunc = 0;
829 struct efx_channel *channel;
830
831 efx_for_each_channel(channel, efx)
832 n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;
833 stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;
834 stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);
835}
836
837/**************************************************************************
838 *
839 * PCI interface
840 *
841 **************************************************************************/
842
843/* Main body of final NIC shutdown code
844 * This is called only at module unload (or hotplug removal).
845 */
846static void efx_pci_remove_main(struct efx_nic *efx)
847{
848 /* Flush reset_work. It can no longer be scheduled since we
849 * are not READY.
850 */
851 BUG_ON(efx->state == STATE_READY);
852 efx_flush_reset_workqueue(efx);
853
854 efx_disable_interrupts(efx);
855 efx_clear_interrupt_affinity(efx);
856 efx_nic_fini_interrupt(efx);
857 efx_fini_port(efx);
858 efx->type->fini(efx);
859 efx_fini_napi(efx);
860 efx_remove_all(efx);
861}
862
863/* Final NIC shutdown
864 * This is called only at module unload (or hotplug removal). A PF can call
865 * this on its VFs to ensure they are unbound first.
866 */
867static void efx_pci_remove(struct pci_dev *pci_dev)
868{
869 struct efx_nic *efx;
870
871 efx = pci_get_drvdata(pci_dev);
872 if (!efx)
873 return;
874
875 /* Mark the NIC as fini, then stop the interface */
876 rtnl_lock();
877 efx_dissociate(efx);
878 dev_close(efx->net_dev);
879 efx_disable_interrupts(efx);
880 efx->state = STATE_UNINIT;
881 rtnl_unlock();
882
883 if (efx->type->sriov_fini)
884 efx->type->sriov_fini(efx);
885
886 efx_unregister_netdev(efx);
887
888 efx_mtd_remove(efx);
889
890 efx_pci_remove_main(efx);
891
892 efx_fini_io(efx);
893 netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
894
895 efx_fini_struct(efx);
896 free_netdev(efx->net_dev);
897
898 pci_disable_pcie_error_reporting(pci_dev);
899};
900
901/* NIC VPD information
902 * Called during probe to display the part number of the
903 * installed NIC. VPD is potentially very large but this should
904 * always appear within the first 512 bytes.
905 */
906#define SFC_VPD_LEN 512
907static void efx_probe_vpd_strings(struct efx_nic *efx)
908{
909 struct pci_dev *dev = efx->pci_dev;
910 char vpd_data[SFC_VPD_LEN];
911 ssize_t vpd_size;
912 int ro_start, ro_size, i, j;
913
914 /* Get the vpd data from the device */
915 vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data);
916 if (vpd_size <= 0) {
917 netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n");
918 return;
919 }
920
921 /* Get the Read only section */
922 ro_start = pci_vpd_find_tag(vpd_data, vpd_size, PCI_VPD_LRDT_RO_DATA);
923 if (ro_start < 0) {
924 netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n");
925 return;
926 }
927
928 ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]);
929 j = ro_size;
930 i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
931 if (i + j > vpd_size)
932 j = vpd_size - i;
933
934 /* Get the Part number */
935 i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN");
936 if (i < 0) {
937 netif_err(efx, drv, efx->net_dev, "Part number not found\n");
938 return;
939 }
940
941 j = pci_vpd_info_field_size(&vpd_data[i]);
942 i += PCI_VPD_INFO_FLD_HDR_SIZE;
943 if (i + j > vpd_size) {
944 netif_err(efx, drv, efx->net_dev, "Incomplete part number\n");
945 return;
946 }
947
948 netif_info(efx, drv, efx->net_dev,
949 "Part Number : %.*s\n", j, &vpd_data[i]);
950
951 i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
952 j = ro_size;
953 i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN");
954 if (i < 0) {
955 netif_err(efx, drv, efx->net_dev, "Serial number not found\n");
956 return;
957 }
958
959 j = pci_vpd_info_field_size(&vpd_data[i]);
960 i += PCI_VPD_INFO_FLD_HDR_SIZE;
961 if (i + j > vpd_size) {
962 netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n");
963 return;
964 }
965
966 efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL);
967 if (!efx->vpd_sn)
968 return;
969
970 snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]);
971}
972
973
974/* Main body of NIC initialisation
975 * This is called at module load (or hotplug insertion, theoretically).
976 */
977static int efx_pci_probe_main(struct efx_nic *efx)
978{
979 int rc;
980
981 /* Do start-of-day initialisation */
982 rc = efx_probe_all(efx);
983 if (rc)
984 goto fail1;
985
986 efx_init_napi(efx);
987
988 down_write(&efx->filter_sem);
989 rc = efx->type->init(efx);
990 up_write(&efx->filter_sem);
991 if (rc) {
992 pci_err(efx->pci_dev, "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 pci_err(efx->pci_dev, "SR-IOV can't be enabled rc %d\n",
1040 rc);
1041 }
1042
1043 /* Determine netdevice features */
1044 net_dev->features |= (efx->type->offload_features | NETIF_F_SG |
1045 NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_RXALL);
1046 if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM))
1047 net_dev->features |= NETIF_F_TSO6;
1048 /* Check whether device supports TSO */
1049 if (!efx->type->tso_versions || !efx->type->tso_versions(efx))
1050 net_dev->features &= ~NETIF_F_ALL_TSO;
1051 /* Mask for features that also apply to VLAN devices */
1052 net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG |
1053 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |
1054 NETIF_F_RXCSUM);
1055
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 pci_info(pci_dev, "Solarflare NIC detected\n");
1108
1109 if (!efx->type->is_vf)
1110 efx_probe_vpd_strings(efx);
1111
1112 /* Set up basic I/O (BAR mappings etc) */
1113 rc = efx_init_io(efx, efx->type->mem_bar(efx), efx->type->max_dma_mask,
1114 efx->type->mem_map_size(efx));
1115 if (rc)
1116 goto fail2;
1117
1118 rc = efx_pci_probe_post_io(efx);
1119 if (rc) {
1120 /* On failure, retry once immediately.
1121 * If we aborted probe due to a scheduled reset, dismiss it.
1122 */
1123 efx->reset_pending = 0;
1124 rc = efx_pci_probe_post_io(efx);
1125 if (rc) {
1126 /* On another failure, retry once more
1127 * after a 50-305ms delay.
1128 */
1129 unsigned char r;
1130
1131 get_random_bytes(&r, 1);
1132 msleep((unsigned int)r + 50);
1133 efx->reset_pending = 0;
1134 rc = efx_pci_probe_post_io(efx);
1135 }
1136 }
1137 if (rc)
1138 goto fail3;
1139
1140 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
1141
1142 /* Try to create MTDs, but allow this to fail */
1143 rtnl_lock();
1144 rc = efx_mtd_probe(efx);
1145 rtnl_unlock();
1146 if (rc && rc != -EPERM)
1147 netif_warn(efx, probe, efx->net_dev,
1148 "failed to create MTDs (%d)\n", rc);
1149
1150 (void)pci_enable_pcie_error_reporting(pci_dev);
1151
1152 if (efx->type->udp_tnl_push_ports)
1153 efx->type->udp_tnl_push_ports(efx);
1154
1155 return 0;
1156
1157 fail3:
1158 efx_fini_io(efx);
1159 fail2:
1160 efx_fini_struct(efx);
1161 fail1:
1162 WARN_ON(rc > 0);
1163 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
1164 free_netdev(net_dev);
1165 return rc;
1166}
1167
1168/* efx_pci_sriov_configure returns the actual number of Virtual Functions
1169 * enabled on success
1170 */
1171#ifdef CONFIG_SFC_SRIOV
1172static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs)
1173{
1174 int rc;
1175 struct efx_nic *efx = pci_get_drvdata(dev);
1176
1177 if (efx->type->sriov_configure) {
1178 rc = efx->type->sriov_configure(efx, num_vfs);
1179 if (rc)
1180 return rc;
1181 else
1182 return num_vfs;
1183 } else
1184 return -EOPNOTSUPP;
1185}
1186#endif
1187
1188static int efx_pm_freeze(struct device *dev)
1189{
1190 struct efx_nic *efx = dev_get_drvdata(dev);
1191
1192 rtnl_lock();
1193
1194 if (efx->state != STATE_DISABLED) {
1195 efx->state = STATE_UNINIT;
1196
1197 efx_device_detach_sync(efx);
1198
1199 efx_stop_all(efx);
1200 efx_disable_interrupts(efx);
1201 }
1202
1203 rtnl_unlock();
1204
1205 return 0;
1206}
1207
1208static int efx_pm_thaw(struct device *dev)
1209{
1210 int rc;
1211 struct efx_nic *efx = dev_get_drvdata(dev);
1212
1213 rtnl_lock();
1214
1215 if (efx->state != STATE_DISABLED) {
1216 rc = efx_enable_interrupts(efx);
1217 if (rc)
1218 goto fail;
1219
1220 mutex_lock(&efx->mac_lock);
1221 efx_mcdi_port_reconfigure(efx);
1222 mutex_unlock(&efx->mac_lock);
1223
1224 efx_start_all(efx);
1225
1226 efx_device_attach_if_not_resetting(efx);
1227
1228 efx->state = STATE_READY;
1229
1230 efx->type->resume_wol(efx);
1231 }
1232
1233 rtnl_unlock();
1234
1235 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
1236 efx_queue_reset_work(efx);
1237
1238 return 0;
1239
1240fail:
1241 rtnl_unlock();
1242
1243 return rc;
1244}
1245
1246static int efx_pm_poweroff(struct device *dev)
1247{
1248 struct pci_dev *pci_dev = to_pci_dev(dev);
1249 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1250
1251 efx->type->fini(efx);
1252
1253 efx->reset_pending = 0;
1254
1255 pci_save_state(pci_dev);
1256 return pci_set_power_state(pci_dev, PCI_D3hot);
1257}
1258
1259/* Used for both resume and restore */
1260static int efx_pm_resume(struct device *dev)
1261{
1262 struct pci_dev *pci_dev = to_pci_dev(dev);
1263 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1264 int rc;
1265
1266 rc = pci_set_power_state(pci_dev, PCI_D0);
1267 if (rc)
1268 return rc;
1269 pci_restore_state(pci_dev);
1270 rc = pci_enable_device(pci_dev);
1271 if (rc)
1272 return rc;
1273 pci_set_master(efx->pci_dev);
1274 rc = efx->type->reset(efx, RESET_TYPE_ALL);
1275 if (rc)
1276 return rc;
1277 down_write(&efx->filter_sem);
1278 rc = efx->type->init(efx);
1279 up_write(&efx->filter_sem);
1280 if (rc)
1281 return rc;
1282 rc = efx_pm_thaw(dev);
1283 return rc;
1284}
1285
1286static int efx_pm_suspend(struct device *dev)
1287{
1288 int rc;
1289
1290 efx_pm_freeze(dev);
1291 rc = efx_pm_poweroff(dev);
1292 if (rc)
1293 efx_pm_resume(dev);
1294 return rc;
1295}
1296
1297static const struct dev_pm_ops efx_pm_ops = {
1298 .suspend = efx_pm_suspend,
1299 .resume = efx_pm_resume,
1300 .freeze = efx_pm_freeze,
1301 .thaw = efx_pm_thaw,
1302 .poweroff = efx_pm_poweroff,
1303 .restore = efx_pm_resume,
1304};
1305
1306static struct pci_driver efx_pci_driver = {
1307 .name = KBUILD_MODNAME,
1308 .id_table = efx_pci_table,
1309 .probe = efx_pci_probe,
1310 .remove = efx_pci_remove,
1311 .driver.pm = &efx_pm_ops,
1312 .err_handler = &efx_err_handlers,
1313#ifdef CONFIG_SFC_SRIOV
1314 .sriov_configure = efx_pci_sriov_configure,
1315#endif
1316};
1317
1318/**************************************************************************
1319 *
1320 * Kernel module interface
1321 *
1322 *************************************************************************/
1323
1324static int __init efx_init_module(void)
1325{
1326 int rc;
1327
1328 printk(KERN_INFO "Solarflare NET driver\n");
1329
1330 rc = register_netdevice_notifier(&efx_netdev_notifier);
1331 if (rc)
1332 goto err_notifier;
1333
1334#ifdef CONFIG_SFC_SRIOV
1335 rc = efx_init_sriov();
1336 if (rc)
1337 goto err_sriov;
1338#endif
1339
1340 rc = efx_create_reset_workqueue();
1341 if (rc)
1342 goto err_reset;
1343
1344 rc = pci_register_driver(&efx_pci_driver);
1345 if (rc < 0)
1346 goto err_pci;
1347
1348 rc = pci_register_driver(&ef100_pci_driver);
1349 if (rc < 0)
1350 goto err_pci_ef100;
1351
1352 return 0;
1353
1354 err_pci_ef100:
1355 pci_unregister_driver(&efx_pci_driver);
1356 err_pci:
1357 efx_destroy_reset_workqueue();
1358 err_reset:
1359#ifdef CONFIG_SFC_SRIOV
1360 efx_fini_sriov();
1361 err_sriov:
1362#endif
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#ifdef CONFIG_SFC_SRIOV
1376 efx_fini_sriov();
1377#endif
1378 unregister_netdevice_notifier(&efx_netdev_notifier);
1379
1380}
1381
1382module_init(efx_init_module);
1383module_exit(efx_exit_module);
1384
1385MODULE_AUTHOR("Solarflare Communications and "
1386 "Michael Brown <mbrown@fensystems.co.uk>");
1387MODULE_DESCRIPTION("Solarflare network driver");
1388MODULE_LICENSE("GPL");
1389MODULE_DEVICE_TABLE(pci, efx_pci_table);