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 <net/netdev_queues.h>
26 #include "efx.h"
27 #include "efx_common.h"
28 #include "efx_channels.h"
29 #include "ef100.h"
30 #include "rx_common.h"
31 #include "tx_common.h"
32 #include "nic.h"
33 #include "io.h"
34 #include "selftest.h"
35 #include "sriov.h"
36 #include "efx_devlink.h"
37 #include "efx_cxl.h"
38
39 #include "mcdi_port_common.h"
40 #include "mcdi_pcol.h"
41 #include "workarounds.h"
42
43 /**************************************************************************
44 *
45 * Configurable values
46 *
47 *************************************************************************/
48
49 module_param_named(interrupt_mode, efx_interrupt_mode, uint, 0444);
50 MODULE_PARM_DESC(interrupt_mode,
51 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
52
53 module_param(rss_cpus, uint, 0444);
54 MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling");
55
56 /*
57 * Use separate channels for TX and RX events
58 *
59 * Set this to 1 to use separate channels for TX and RX. It allows us
60 * to control interrupt affinity separately for TX and RX.
61 *
62 * This is only used in MSI-X interrupt mode
63 */
64 bool efx_separate_tx_channels;
65 module_param(efx_separate_tx_channels, bool, 0444);
66 MODULE_PARM_DESC(efx_separate_tx_channels,
67 "Use separate channels for TX and RX");
68
69 /* Initial interrupt moderation settings. They can be modified after
70 * module load with ethtool.
71 *
72 * The default for RX should strike a balance between increasing the
73 * round-trip latency and reducing overhead.
74 */
75 static unsigned int rx_irq_mod_usec = 60;
76
77 /* Initial interrupt moderation settings. They can be modified after
78 * module load with ethtool.
79 *
80 * This default is chosen to ensure that a 10G link does not go idle
81 * while a TX queue is stopped after it has become full. A queue is
82 * restarted when it drops below half full. The time this takes (assuming
83 * worst case 3 descriptors per packet and 1024 descriptors) is
84 * 512 / 3 * 1.2 = 205 usec.
85 */
86 static unsigned int tx_irq_mod_usec = 150;
87
88 static bool phy_flash_cfg;
89 module_param(phy_flash_cfg, bool, 0644);
90 MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially");
91
92 static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
93 NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
94 NETIF_MSG_IFUP | NETIF_MSG_RX_ERR |
95 NETIF_MSG_TX_ERR | NETIF_MSG_HW);
96 module_param(debug, uint, 0);
97 MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value");
98
99 /**************************************************************************
100 *
101 * Utility functions and prototypes
102 *
103 *************************************************************************/
104
105 static void efx_remove_port(struct efx_nic *efx);
106 static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog);
107 static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp);
108 static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
109 u32 flags);
110
111 /**************************************************************************
112 *
113 * Port handling
114 *
115 **************************************************************************/
116
117 static void efx_fini_port(struct efx_nic *efx);
118
efx_probe_port(struct efx_nic * efx)119 static int efx_probe_port(struct efx_nic *efx)
120 {
121 int rc;
122
123 netif_dbg(efx, probe, efx->net_dev, "create port\n");
124
125 if (phy_flash_cfg)
126 efx->phy_mode = PHY_MODE_SPECIAL;
127
128 /* Connect up MAC/PHY operations table */
129 rc = efx->type->probe_port(efx);
130 if (rc)
131 return rc;
132
133 /* Initialise MAC address to permanent address */
134 eth_hw_addr_set(efx->net_dev, efx->net_dev->perm_addr);
135
136 return 0;
137 }
138
efx_init_port(struct efx_nic * efx)139 static int efx_init_port(struct efx_nic *efx)
140 {
141 int rc;
142
143 netif_dbg(efx, drv, efx->net_dev, "init port\n");
144
145 mutex_lock(&efx->mac_lock);
146
147 efx->port_initialized = true;
148
149 /* Ensure the PHY advertises the correct flow control settings */
150 rc = efx_mcdi_port_reconfigure(efx);
151 if (rc && rc != -EPERM)
152 goto fail;
153
154 mutex_unlock(&efx->mac_lock);
155 return 0;
156
157 fail:
158 mutex_unlock(&efx->mac_lock);
159 return rc;
160 }
161
efx_fini_port(struct efx_nic * efx)162 static void efx_fini_port(struct efx_nic *efx)
163 {
164 netif_dbg(efx, drv, efx->net_dev, "shut down port\n");
165
166 if (!efx->port_initialized)
167 return;
168
169 efx->port_initialized = false;
170
171 efx->link_state.up = false;
172 efx_link_status_changed(efx);
173 }
174
efx_remove_port(struct efx_nic * efx)175 static void efx_remove_port(struct efx_nic *efx)
176 {
177 netif_dbg(efx, drv, efx->net_dev, "destroying port\n");
178
179 efx->type->remove_port(efx);
180 }
181
182 /**************************************************************************
183 *
184 * NIC handling
185 *
186 **************************************************************************/
187
188 static LIST_HEAD(efx_primary_list);
189 static LIST_HEAD(efx_unassociated_list);
190
efx_same_controller(struct efx_nic * left,struct efx_nic * right)191 static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right)
192 {
193 return left->type == right->type &&
194 left->vpd_sn && right->vpd_sn &&
195 !strcmp(left->vpd_sn, right->vpd_sn);
196 }
197
efx_associate(struct efx_nic * efx)198 static void efx_associate(struct efx_nic *efx)
199 {
200 struct efx_nic *other, *next;
201
202 if (efx->primary == efx) {
203 /* Adding primary function; look for secondaries */
204
205 netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n");
206 list_add_tail(&efx->node, &efx_primary_list);
207
208 list_for_each_entry_safe(other, next, &efx_unassociated_list,
209 node) {
210 if (efx_same_controller(efx, other)) {
211 list_del(&other->node);
212 netif_dbg(other, probe, other->net_dev,
213 "moving to secondary list of %s %s\n",
214 pci_name(efx->pci_dev),
215 efx->net_dev->name);
216 list_add_tail(&other->node,
217 &efx->secondary_list);
218 other->primary = efx;
219 }
220 }
221 } else {
222 /* Adding secondary function; look for primary */
223
224 list_for_each_entry(other, &efx_primary_list, node) {
225 if (efx_same_controller(efx, other)) {
226 netif_dbg(efx, probe, efx->net_dev,
227 "adding to secondary list of %s %s\n",
228 pci_name(other->pci_dev),
229 other->net_dev->name);
230 list_add_tail(&efx->node,
231 &other->secondary_list);
232 efx->primary = other;
233 return;
234 }
235 }
236
237 netif_dbg(efx, probe, efx->net_dev,
238 "adding to unassociated list\n");
239 list_add_tail(&efx->node, &efx_unassociated_list);
240 }
241 }
242
efx_dissociate(struct efx_nic * efx)243 static void efx_dissociate(struct efx_nic *efx)
244 {
245 struct efx_nic *other, *next;
246
247 list_del(&efx->node);
248 efx->primary = NULL;
249
250 list_for_each_entry_safe(other, next, &efx->secondary_list, node) {
251 list_del(&other->node);
252 netif_dbg(other, probe, other->net_dev,
253 "moving to unassociated list\n");
254 list_add_tail(&other->node, &efx_unassociated_list);
255 other->primary = NULL;
256 }
257 }
258
efx_probe_nic(struct efx_nic * efx)259 static int efx_probe_nic(struct efx_nic *efx)
260 {
261 int rc;
262
263 netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
264
265 /* Carry out hardware-type specific initialisation */
266 rc = efx->type->probe(efx);
267 if (rc)
268 return rc;
269
270 do {
271 if (!efx->max_channels || !efx->max_tx_channels) {
272 netif_err(efx, drv, efx->net_dev,
273 "Insufficient resources to allocate"
274 " any channels\n");
275 rc = -ENOSPC;
276 goto fail1;
277 }
278
279 /* Determine the number of channels and queues by trying
280 * to hook in MSI-X interrupts.
281 */
282 rc = efx_probe_interrupts(efx);
283 if (rc)
284 goto fail1;
285
286 rc = efx_set_channels(efx);
287 if (rc)
288 goto fail1;
289
290 /* dimension_resources can fail with EAGAIN */
291 rc = efx->type->dimension_resources(efx);
292 if (rc != 0 && rc != -EAGAIN)
293 goto fail2;
294
295 if (rc == -EAGAIN)
296 /* try again with new max_channels */
297 efx_remove_interrupts(efx);
298
299 } while (rc == -EAGAIN);
300
301 if (efx->n_channels > 1)
302 netdev_rss_key_fill(efx->rss_context.rx_hash_key,
303 sizeof(efx->rss_context.rx_hash_key));
304 efx_set_default_rx_indir_table(efx, efx->rss_context.rx_indir_table);
305
306 /* Initialise the interrupt moderation settings */
307 efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000);
308 efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true,
309 true);
310
311 return 0;
312
313 fail2:
314 efx_remove_interrupts(efx);
315 fail1:
316 efx->type->remove(efx);
317 return rc;
318 }
319
efx_remove_nic(struct efx_nic * efx)320 static void efx_remove_nic(struct efx_nic *efx)
321 {
322 netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");
323
324 efx_remove_interrupts(efx);
325 efx->type->remove(efx);
326 }
327
328 /**************************************************************************
329 *
330 * NIC startup/shutdown
331 *
332 *************************************************************************/
333
efx_probe_all(struct efx_nic * efx)334 static int efx_probe_all(struct efx_nic *efx)
335 {
336 int rc;
337
338 rc = efx_probe_nic(efx);
339 if (rc) {
340 netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
341 goto fail1;
342 }
343
344 rc = efx_probe_port(efx);
345 if (rc) {
346 netif_err(efx, probe, efx->net_dev, "failed to create port\n");
347 goto fail2;
348 }
349
350 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT);
351 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) {
352 rc = -EINVAL;
353 goto fail3;
354 }
355
356 #ifdef CONFIG_SFC_SRIOV
357 rc = efx->type->vswitching_probe(efx);
358 if (rc) /* not fatal; the PF will still work fine */
359 netif_warn(efx, probe, efx->net_dev,
360 "failed to setup vswitching rc=%d;"
361 " VFs may not function\n", rc);
362 #endif
363
364 rc = efx_probe_filters(efx);
365 if (rc) {
366 netif_err(efx, probe, efx->net_dev,
367 "failed to create filter tables\n");
368 goto fail4;
369 }
370
371 rc = efx_probe_channels(efx);
372 if (rc)
373 goto fail5;
374
375 efx->state = STATE_NET_DOWN;
376
377 return 0;
378
379 fail5:
380 efx_remove_filters(efx);
381 fail4:
382 #ifdef CONFIG_SFC_SRIOV
383 efx->type->vswitching_remove(efx);
384 #endif
385 fail3:
386 efx_remove_port(efx);
387 fail2:
388 efx_remove_nic(efx);
389 fail1:
390 return rc;
391 }
392
efx_remove_all(struct efx_nic * efx)393 static void efx_remove_all(struct efx_nic *efx)
394 {
395 rtnl_lock();
396 efx_xdp_setup_prog(efx, NULL);
397 rtnl_unlock();
398
399 efx_remove_channels(efx);
400 efx_remove_filters(efx);
401 #ifdef CONFIG_SFC_SRIOV
402 efx->type->vswitching_remove(efx);
403 #endif
404 efx_remove_port(efx);
405 efx_remove_nic(efx);
406 }
407
408 /**************************************************************************
409 *
410 * Interrupt moderation
411 *
412 **************************************************************************/
efx_usecs_to_ticks(struct efx_nic * efx,unsigned int usecs)413 unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs)
414 {
415 if (usecs == 0)
416 return 0;
417 if (usecs * 1000 < efx->timer_quantum_ns)
418 return 1; /* never round down to 0 */
419 return usecs * 1000 / efx->timer_quantum_ns;
420 }
421
422 /* Set interrupt moderation parameters */
efx_init_irq_moderation(struct efx_nic * efx,unsigned int tx_usecs,unsigned int rx_usecs,bool rx_adaptive,bool rx_may_override_tx)423 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
424 unsigned int rx_usecs, bool rx_adaptive,
425 bool rx_may_override_tx)
426 {
427 struct efx_channel *channel;
428 unsigned int timer_max_us;
429
430 EFX_ASSERT_RESET_SERIALISED(efx);
431
432 timer_max_us = efx->timer_max_ns / 1000;
433
434 if (tx_usecs > timer_max_us || rx_usecs > timer_max_us)
435 return -EINVAL;
436
437 if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 &&
438 !rx_may_override_tx) {
439 netif_err(efx, drv, efx->net_dev, "Channels are shared. "
440 "RX and TX IRQ moderation must be equal\n");
441 return -EINVAL;
442 }
443
444 efx->irq_rx_adaptive = rx_adaptive;
445 efx->irq_rx_moderation_us = rx_usecs;
446 efx_for_each_channel(channel, efx) {
447 if (efx_channel_has_rx_queue(channel))
448 channel->irq_moderation_us = rx_usecs;
449 else if (efx_channel_has_tx_queues(channel))
450 channel->irq_moderation_us = tx_usecs;
451 else if (efx_channel_is_xdp_tx(channel))
452 channel->irq_moderation_us = tx_usecs;
453 }
454
455 return 0;
456 }
457
efx_get_irq_moderation(struct efx_nic * efx,unsigned int * tx_usecs,unsigned int * rx_usecs,bool * rx_adaptive)458 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
459 unsigned int *rx_usecs, bool *rx_adaptive)
460 {
461 *rx_adaptive = efx->irq_rx_adaptive;
462 *rx_usecs = efx->irq_rx_moderation_us;
463
464 /* If channels are shared between RX and TX, so is IRQ
465 * moderation. Otherwise, IRQ moderation is the same for all
466 * TX channels and is not adaptive.
467 */
468 if (efx->tx_channel_offset == 0) {
469 *tx_usecs = *rx_usecs;
470 } else {
471 struct efx_channel *tx_channel;
472
473 tx_channel = efx->channel[efx->tx_channel_offset];
474 *tx_usecs = tx_channel->irq_moderation_us;
475 }
476 }
477
478 /**************************************************************************
479 *
480 * Kernel net device interface
481 *
482 *************************************************************************/
483
484 /* Context: process, rtnl_lock() held. */
efx_net_open(struct net_device * net_dev)485 int efx_net_open(struct net_device *net_dev)
486 {
487 struct efx_nic *efx = efx_netdev_priv(net_dev);
488 int rc;
489
490 netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
491 raw_smp_processor_id());
492
493 rc = efx_check_disabled(efx);
494 if (rc)
495 return rc;
496 if (efx->phy_mode & PHY_MODE_SPECIAL)
497 return -EBUSY;
498 if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
499 return -EIO;
500
501 /* Notify the kernel of the link state polled during driver load,
502 * before the monitor starts running */
503 efx_link_status_changed(efx);
504
505 efx_start_all(efx);
506 if (efx->state == STATE_DISABLED || efx->reset_pending)
507 netif_device_detach(efx->net_dev);
508 else
509 efx->state = STATE_NET_UP;
510
511 return 0;
512 }
513
514 /* Context: process, rtnl_lock() held.
515 * Note that the kernel will ignore our return code; this method
516 * should really be a void.
517 */
efx_net_stop(struct net_device * net_dev)518 int efx_net_stop(struct net_device *net_dev)
519 {
520 struct efx_nic *efx = efx_netdev_priv(net_dev);
521
522 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
523 raw_smp_processor_id());
524
525 /* Stop the device and flush all the channels */
526 efx_stop_all(efx);
527
528 return 0;
529 }
530
efx_vlan_rx_add_vid(struct net_device * net_dev,__be16 proto,u16 vid)531 static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid)
532 {
533 struct efx_nic *efx = efx_netdev_priv(net_dev);
534
535 if (efx->type->vlan_rx_add_vid)
536 return efx->type->vlan_rx_add_vid(efx, proto, vid);
537 else
538 return -EOPNOTSUPP;
539 }
540
efx_vlan_rx_kill_vid(struct net_device * net_dev,__be16 proto,u16 vid)541 static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid)
542 {
543 struct efx_nic *efx = efx_netdev_priv(net_dev);
544
545 if (efx->type->vlan_rx_kill_vid)
546 return efx->type->vlan_rx_kill_vid(efx, proto, vid);
547 else
548 return -EOPNOTSUPP;
549 }
550
efx_hwtstamp_set(struct net_device * net_dev,struct kernel_hwtstamp_config * config,struct netlink_ext_ack * extack)551 static int efx_hwtstamp_set(struct net_device *net_dev,
552 struct kernel_hwtstamp_config *config,
553 struct netlink_ext_ack *extack)
554 {
555 struct efx_nic *efx = efx_netdev_priv(net_dev);
556
557 return efx_ptp_set_ts_config(efx, config, extack);
558 }
559
efx_hwtstamp_get(struct net_device * net_dev,struct kernel_hwtstamp_config * config)560 static int efx_hwtstamp_get(struct net_device *net_dev,
561 struct kernel_hwtstamp_config *config)
562 {
563 struct efx_nic *efx = efx_netdev_priv(net_dev);
564
565 return efx_ptp_get_ts_config(efx, config);
566 }
567
568 static const struct net_device_ops efx_netdev_ops = {
569 .ndo_open = efx_net_open,
570 .ndo_stop = efx_net_stop,
571 .ndo_get_stats64 = efx_net_stats,
572 .ndo_tx_timeout = efx_watchdog,
573 .ndo_start_xmit = efx_hard_start_xmit,
574 .ndo_validate_addr = eth_validate_addr,
575 .ndo_change_mtu = efx_change_mtu,
576 .ndo_set_mac_address = efx_set_mac_address,
577 .ndo_set_rx_mode = efx_set_rx_mode,
578 .ndo_set_features = efx_set_features,
579 .ndo_features_check = efx_features_check,
580 .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid,
581 .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid,
582 .ndo_hwtstamp_set = efx_hwtstamp_set,
583 .ndo_hwtstamp_get = efx_hwtstamp_get,
584 #ifdef CONFIG_SFC_SRIOV
585 .ndo_set_vf_mac = efx_sriov_set_vf_mac,
586 .ndo_set_vf_vlan = efx_sriov_set_vf_vlan,
587 .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk,
588 .ndo_get_vf_config = efx_sriov_get_vf_config,
589 .ndo_set_vf_link_state = efx_sriov_set_vf_link_state,
590 #endif
591 .ndo_get_phys_port_id = efx_get_phys_port_id,
592 .ndo_get_phys_port_name = efx_get_phys_port_name,
593 #ifdef CONFIG_RFS_ACCEL
594 .ndo_rx_flow_steer = efx_filter_rfs,
595 #endif
596 .ndo_xdp_xmit = efx_xdp_xmit,
597 .ndo_bpf = efx_xdp
598 };
599
efx_get_queue_stats_rx(struct net_device * net_dev,int idx,struct netdev_queue_stats_rx * stats)600 static void efx_get_queue_stats_rx(struct net_device *net_dev, int idx,
601 struct netdev_queue_stats_rx *stats)
602 {
603 struct efx_nic *efx = efx_netdev_priv(net_dev);
604 struct efx_rx_queue *rx_queue;
605 struct efx_channel *channel;
606
607 channel = efx_get_channel(efx, idx);
608 rx_queue = efx_channel_get_rx_queue(channel);
609 /* Count only packets since last time datapath was started */
610 stats->packets = rx_queue->rx_packets - rx_queue->old_rx_packets;
611 stats->bytes = rx_queue->rx_bytes - rx_queue->old_rx_bytes;
612 stats->hw_drops = efx_get_queue_stat_rx_hw_drops(channel) -
613 channel->old_n_rx_hw_drops;
614 stats->hw_drop_overruns = channel->n_rx_nodesc_trunc -
615 channel->old_n_rx_hw_drop_overruns;
616 }
617
efx_get_queue_stats_tx(struct net_device * net_dev,int idx,struct netdev_queue_stats_tx * stats)618 static void efx_get_queue_stats_tx(struct net_device *net_dev, int idx,
619 struct netdev_queue_stats_tx *stats)
620 {
621 struct efx_nic *efx = efx_netdev_priv(net_dev);
622 struct efx_tx_queue *tx_queue;
623 struct efx_channel *channel;
624
625 channel = efx_get_tx_channel(efx, idx);
626 stats->packets = 0;
627 stats->bytes = 0;
628 stats->hw_gso_packets = 0;
629 stats->hw_gso_wire_packets = 0;
630 efx_for_each_channel_tx_queue(tx_queue, channel) {
631 stats->packets += tx_queue->complete_packets -
632 tx_queue->old_complete_packets;
633 stats->bytes += tx_queue->complete_bytes -
634 tx_queue->old_complete_bytes;
635 /* Note that, unlike stats->packets and stats->bytes,
636 * these count TXes enqueued, rather than completed,
637 * which may not be what users expect.
638 */
639 stats->hw_gso_packets += tx_queue->tso_bursts -
640 tx_queue->old_tso_bursts;
641 stats->hw_gso_wire_packets += tx_queue->tso_packets -
642 tx_queue->old_tso_packets;
643 }
644 }
645
efx_get_base_stats(struct net_device * net_dev,struct netdev_queue_stats_rx * rx,struct netdev_queue_stats_tx * tx)646 static void efx_get_base_stats(struct net_device *net_dev,
647 struct netdev_queue_stats_rx *rx,
648 struct netdev_queue_stats_tx *tx)
649 {
650 struct efx_nic *efx = efx_netdev_priv(net_dev);
651 struct efx_tx_queue *tx_queue;
652 struct efx_rx_queue *rx_queue;
653 struct efx_channel *channel;
654
655 rx->packets = 0;
656 rx->bytes = 0;
657 rx->hw_drops = 0;
658 rx->hw_drop_overruns = 0;
659 tx->packets = 0;
660 tx->bytes = 0;
661 tx->hw_gso_packets = 0;
662 tx->hw_gso_wire_packets = 0;
663
664 /* Count all packets on non-core queues, and packets before last
665 * datapath start on core queues.
666 */
667 efx_for_each_channel(channel, efx) {
668 rx_queue = efx_channel_get_rx_queue(channel);
669 if (channel->channel >= net_dev->real_num_rx_queues) {
670 rx->packets += rx_queue->rx_packets;
671 rx->bytes += rx_queue->rx_bytes;
672 rx->hw_drops += efx_get_queue_stat_rx_hw_drops(channel);
673 rx->hw_drop_overruns += channel->n_rx_nodesc_trunc;
674 } else {
675 rx->packets += rx_queue->old_rx_packets;
676 rx->bytes += rx_queue->old_rx_bytes;
677 rx->hw_drops += channel->old_n_rx_hw_drops;
678 rx->hw_drop_overruns += channel->old_n_rx_hw_drop_overruns;
679 }
680 efx_for_each_channel_tx_queue(tx_queue, channel) {
681 if (channel->channel < efx->tx_channel_offset ||
682 channel->channel >= efx->tx_channel_offset +
683 net_dev->real_num_tx_queues) {
684 tx->packets += tx_queue->complete_packets;
685 tx->bytes += tx_queue->complete_bytes;
686 tx->hw_gso_packets += tx_queue->tso_bursts;
687 tx->hw_gso_wire_packets += tx_queue->tso_packets;
688 } else {
689 tx->packets += tx_queue->old_complete_packets;
690 tx->bytes += tx_queue->old_complete_bytes;
691 tx->hw_gso_packets += tx_queue->old_tso_bursts;
692 tx->hw_gso_wire_packets += tx_queue->old_tso_packets;
693 }
694 /* Include XDP TX in device-wide stats */
695 tx->packets += tx_queue->complete_xdp_packets;
696 tx->bytes += tx_queue->complete_xdp_bytes;
697 }
698 }
699 }
700
701 static const struct netdev_stat_ops efx_stat_ops = {
702 .get_queue_stats_rx = efx_get_queue_stats_rx,
703 .get_queue_stats_tx = efx_get_queue_stats_tx,
704 .get_base_stats = efx_get_base_stats,
705 };
706
efx_xdp_setup_prog(struct efx_nic * efx,struct bpf_prog * prog)707 static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog)
708 {
709 struct bpf_prog *old_prog;
710
711 if (efx->xdp_rxq_info_failed) {
712 netif_err(efx, drv, efx->net_dev,
713 "Unable to bind XDP program due to previous failure of rxq_info\n");
714 return -EINVAL;
715 }
716
717 if (prog && efx->net_dev->mtu > efx_xdp_max_mtu(efx)) {
718 netif_err(efx, drv, efx->net_dev,
719 "Unable to configure XDP with MTU of %d (max: %d)\n",
720 efx->net_dev->mtu, efx_xdp_max_mtu(efx));
721 return -EINVAL;
722 }
723
724 old_prog = rtnl_dereference(efx->xdp_prog);
725 rcu_assign_pointer(efx->xdp_prog, prog);
726 /* Release the reference that was originally passed by the caller. */
727 if (old_prog)
728 bpf_prog_put(old_prog);
729
730 return 0;
731 }
732
733 /* Context: process, rtnl_lock() held. */
efx_xdp(struct net_device * dev,struct netdev_bpf * xdp)734 static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp)
735 {
736 struct efx_nic *efx = efx_netdev_priv(dev);
737
738 switch (xdp->command) {
739 case XDP_SETUP_PROG:
740 return efx_xdp_setup_prog(efx, xdp->prog);
741 default:
742 return -EINVAL;
743 }
744 }
745
efx_xdp_xmit(struct net_device * dev,int n,struct xdp_frame ** xdpfs,u32 flags)746 static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
747 u32 flags)
748 {
749 struct efx_nic *efx = efx_netdev_priv(dev);
750
751 if (!netif_running(dev))
752 return -EINVAL;
753
754 return efx_xdp_tx_buffers(efx, n, xdpfs, flags & XDP_XMIT_FLUSH);
755 }
756
efx_update_name(struct efx_nic * efx)757 static void efx_update_name(struct efx_nic *efx)
758 {
759 strcpy(efx->name, efx->net_dev->name);
760 efx_mtd_rename(efx);
761 efx_set_channel_names(efx);
762 }
763
efx_netdev_event(struct notifier_block * this,unsigned long event,void * ptr)764 static int efx_netdev_event(struct notifier_block *this,
765 unsigned long event, void *ptr)
766 {
767 struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
768
769 if ((net_dev->netdev_ops == &efx_netdev_ops) &&
770 event == NETDEV_CHANGENAME)
771 efx_update_name(efx_netdev_priv(net_dev));
772
773 return NOTIFY_DONE;
774 }
775
776 static struct notifier_block efx_netdev_notifier = {
777 .notifier_call = efx_netdev_event,
778 };
779
phy_type_show(struct device * dev,struct device_attribute * attr,char * buf)780 static ssize_t phy_type_show(struct device *dev,
781 struct device_attribute *attr, char *buf)
782 {
783 struct efx_nic *efx = dev_get_drvdata(dev);
784 return sprintf(buf, "%d\n", efx->phy_type);
785 }
786 static DEVICE_ATTR_RO(phy_type);
787
efx_register_netdev(struct efx_nic * efx)788 static int efx_register_netdev(struct efx_nic *efx)
789 {
790 struct net_device *net_dev = efx->net_dev;
791 struct efx_channel *channel;
792 int rc;
793
794 net_dev->watchdog_timeo = 5 * HZ;
795 net_dev->irq = efx->pci_dev->irq;
796 net_dev->netdev_ops = &efx_netdev_ops;
797 net_dev->stat_ops = &efx_stat_ops;
798 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)
799 net_dev->priv_flags |= IFF_UNICAST_FLT;
800 net_dev->ethtool_ops = &efx_ethtool_ops;
801 netif_set_tso_max_segs(net_dev, EFX_TSO_MAX_SEGS);
802 net_dev->min_mtu = EFX_MIN_MTU;
803 net_dev->max_mtu = EFX_MAX_MTU;
804
805 rtnl_lock();
806
807 /* Enable resets to be scheduled and check whether any were
808 * already requested. If so, the NIC is probably hosed so we
809 * abort.
810 */
811 if (efx->reset_pending) {
812 pci_err(efx->pci_dev, "aborting probe due to scheduled reset\n");
813 rc = -EIO;
814 goto fail_locked;
815 }
816
817 rc = dev_alloc_name(net_dev, net_dev->name);
818 if (rc < 0)
819 goto fail_locked;
820 efx_update_name(efx);
821
822 /* Always start with carrier off; PHY events will detect the link */
823 netif_carrier_off(net_dev);
824
825 rc = register_netdevice(net_dev);
826 if (rc)
827 goto fail_locked;
828
829 efx_for_each_channel(channel, efx) {
830 struct efx_tx_queue *tx_queue;
831 efx_for_each_channel_tx_queue(tx_queue, channel)
832 efx_init_tx_queue_core_txq(tx_queue);
833 }
834
835 efx_associate(efx);
836
837 efx->state = STATE_NET_DOWN;
838
839 rtnl_unlock();
840
841 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
842 if (rc) {
843 netif_err(efx, drv, efx->net_dev,
844 "failed to init net dev attributes\n");
845 goto fail_registered;
846 }
847
848 efx_init_mcdi_logging(efx);
849
850 return 0;
851
852 fail_registered:
853 rtnl_lock();
854 efx_dissociate(efx);
855 unregister_netdevice(net_dev);
856 fail_locked:
857 efx->state = STATE_UNINIT;
858 rtnl_unlock();
859 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
860 return rc;
861 }
862
efx_unregister_netdev(struct efx_nic * efx)863 static void efx_unregister_netdev(struct efx_nic *efx)
864 {
865 if (!efx->net_dev)
866 return;
867
868 if (WARN_ON(efx_netdev_priv(efx->net_dev) != efx))
869 return;
870
871 if (efx_dev_registered(efx)) {
872 strscpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
873 efx_fini_mcdi_logging(efx);
874 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
875 unregister_netdev(efx->net_dev);
876 }
877 }
878
879 /**************************************************************************
880 *
881 * List of NICs we support
882 *
883 **************************************************************************/
884
885 /* PCI device ID table */
886 static const struct pci_device_id efx_pci_table[] = {
887 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */
888 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
889 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */
890 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
891 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */
892 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
893 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */
894 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
895 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */
896 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
897 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */
898 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
899 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0b03), /* SFC9250 PF */
900 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
901 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1b03), /* SFC9250 VF */
902 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
903 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0c03), /* X4 PF (FF/LL) */
904 .driver_data = (unsigned long)&efx_x4_nic_type},
905 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x2c03), /* X4 PF (FF only) */
906 .driver_data = (unsigned long)&efx_x4_nic_type},
907 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x8c03), /* X4D PF (FF/LL) */
908 .driver_data = (unsigned long)&efx_x4_nic_type},
909 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0xac03), /* X4D PF (FF only) */
910 .driver_data = (unsigned long)&efx_x4_nic_type},
911 {0} /* end of list */
912 };
913
914 /**************************************************************************
915 *
916 * Data housekeeping
917 *
918 **************************************************************************/
919
efx_update_sw_stats(struct efx_nic * efx,u64 * stats)920 void efx_update_sw_stats(struct efx_nic *efx, u64 *stats)
921 {
922 u64 n_rx_nodesc_trunc = 0;
923 struct efx_channel *channel;
924
925 efx_for_each_channel(channel, efx)
926 n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;
927 stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;
928 stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);
929 }
930
931 /**************************************************************************
932 *
933 * PCI interface
934 *
935 **************************************************************************/
936
937 /* Main body of final NIC shutdown code
938 * This is called only at module unload (or hotplug removal).
939 */
efx_pci_remove_main(struct efx_nic * efx)940 static void efx_pci_remove_main(struct efx_nic *efx)
941 {
942 /* Flush reset_work. It can no longer be scheduled since we
943 * are not READY.
944 */
945 WARN_ON(efx_net_active(efx->state));
946 efx_flush_reset_workqueue(efx);
947
948 efx_disable_interrupts(efx);
949 efx_clear_interrupt_affinity(efx);
950 efx_nic_fini_interrupt(efx);
951 efx_fini_port(efx);
952 efx->type->fini(efx);
953 efx_fini_napi(efx);
954 efx_remove_all(efx);
955 }
956
957 /* Final NIC shutdown
958 * This is called only at module unload (or hotplug removal). A PF can call
959 * this on its VFs to ensure they are unbound first.
960 */
efx_pci_remove(struct pci_dev * pci_dev)961 static void efx_pci_remove(struct pci_dev *pci_dev)
962 {
963 struct efx_probe_data *probe_data;
964 struct efx_nic *efx;
965
966 efx = pci_get_drvdata(pci_dev);
967 if (!efx)
968 return;
969
970 /* Mark the NIC as fini, then stop the interface */
971 rtnl_lock();
972 efx_dissociate(efx);
973 dev_close(efx->net_dev);
974 efx_disable_interrupts(efx);
975 efx->state = STATE_UNINIT;
976 rtnl_unlock();
977
978 if (efx->type->sriov_fini)
979 efx->type->sriov_fini(efx);
980
981 efx_fini_devlink_lock(efx);
982 efx_unregister_netdev(efx);
983
984 efx_mtd_remove(efx);
985
986 efx_pci_remove_main(efx);
987
988 efx_fini_io(efx);
989
990 probe_data = container_of(efx, struct efx_probe_data, efx);
991 efx_cxl_exit(probe_data);
992
993 pci_dbg(efx->pci_dev, "shutdown successful\n");
994
995 efx_fini_devlink_and_unlock(efx);
996 efx_fini_struct(efx);
997 free_netdev(efx->net_dev);
998 kfree(probe_data);
999 };
1000
1001 /* NIC VPD information
1002 * Called during probe to display the part number of the
1003 * installed NIC.
1004 */
efx_probe_vpd_strings(struct efx_nic * efx)1005 static void efx_probe_vpd_strings(struct efx_nic *efx)
1006 {
1007 struct pci_dev *dev = efx->pci_dev;
1008 unsigned int vpd_size, kw_len;
1009 u8 *vpd_data;
1010 int start;
1011
1012 vpd_data = pci_vpd_alloc(dev, &vpd_size);
1013 if (IS_ERR(vpd_data)) {
1014 pci_warn(dev, "Unable to read VPD\n");
1015 return;
1016 }
1017
1018 start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
1019 PCI_VPD_RO_KEYWORD_PARTNO, &kw_len);
1020 if (start < 0)
1021 pci_err(dev, "Part number not found or incomplete\n");
1022 else
1023 pci_info(dev, "Part Number : %.*s\n", kw_len, vpd_data + start);
1024
1025 start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
1026 PCI_VPD_RO_KEYWORD_SERIALNO, &kw_len);
1027 if (start < 0)
1028 pci_err(dev, "Serial number not found or incomplete\n");
1029 else
1030 efx->vpd_sn = kmemdup_nul(vpd_data + start, kw_len, GFP_KERNEL);
1031
1032 kfree(vpd_data);
1033 }
1034
1035
1036 /* Main body of NIC initialisation
1037 * This is called at module load (or hotplug insertion, theoretically).
1038 */
efx_pci_probe_main(struct efx_nic * efx)1039 static int efx_pci_probe_main(struct efx_nic *efx)
1040 {
1041 int rc;
1042
1043 /* Do start-of-day initialisation */
1044 rc = efx_probe_all(efx);
1045 if (rc)
1046 goto fail1;
1047
1048 efx_init_napi(efx);
1049
1050 down_write(&efx->filter_sem);
1051 rc = efx->type->init(efx);
1052 up_write(&efx->filter_sem);
1053 if (rc) {
1054 pci_err(efx->pci_dev, "failed to initialise NIC\n");
1055 goto fail3;
1056 }
1057
1058 rc = efx_init_port(efx);
1059 if (rc) {
1060 netif_err(efx, probe, efx->net_dev,
1061 "failed to initialise port\n");
1062 goto fail4;
1063 }
1064
1065 rc = efx_nic_init_interrupt(efx);
1066 if (rc)
1067 goto fail5;
1068
1069 efx_set_interrupt_affinity(efx);
1070 rc = efx_enable_interrupts(efx);
1071 if (rc)
1072 goto fail6;
1073
1074 return 0;
1075
1076 fail6:
1077 efx_clear_interrupt_affinity(efx);
1078 efx_nic_fini_interrupt(efx);
1079 fail5:
1080 efx_fini_port(efx);
1081 fail4:
1082 efx->type->fini(efx);
1083 fail3:
1084 efx_fini_napi(efx);
1085 efx_remove_all(efx);
1086 fail1:
1087 return rc;
1088 }
1089
efx_pci_probe_post_io(struct efx_nic * efx)1090 static int efx_pci_probe_post_io(struct efx_nic *efx)
1091 {
1092 struct net_device *net_dev = efx->net_dev;
1093 int rc = efx_pci_probe_main(efx);
1094
1095 if (rc)
1096 return rc;
1097
1098 if (efx->type->sriov_init) {
1099 rc = efx->type->sriov_init(efx);
1100 if (rc)
1101 pci_err(efx->pci_dev, "SR-IOV can't be enabled rc %d\n",
1102 rc);
1103 }
1104
1105 /* Determine netdevice features */
1106 net_dev->features |= efx->type->offload_features;
1107
1108 /* Add TSO features */
1109 if (efx->type->tso_versions && efx->type->tso_versions(efx))
1110 net_dev->features |= NETIF_F_TSO | NETIF_F_TSO6;
1111
1112 /* Mask for features that also apply to VLAN devices */
1113 net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG |
1114 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |
1115 NETIF_F_RXCSUM);
1116
1117 /* Determine user configurable features */
1118 net_dev->hw_features |= net_dev->features & ~efx->fixed_features;
1119
1120 /* Disable receiving frames with bad FCS, by default. */
1121 net_dev->features &= ~NETIF_F_RXALL;
1122
1123 /* Disable VLAN filtering by default. It may be enforced if
1124 * the feature is fixed (i.e. VLAN filters are required to
1125 * receive VLAN tagged packets due to vPort restrictions).
1126 */
1127 net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
1128 net_dev->features |= efx->fixed_features;
1129
1130 net_dev->xdp_features = NETDEV_XDP_ACT_BASIC |
1131 NETDEV_XDP_ACT_REDIRECT |
1132 NETDEV_XDP_ACT_NDO_XMIT;
1133
1134 /* devlink creation, registration and lock */
1135 rc = efx_probe_devlink_and_lock(efx);
1136 if (rc)
1137 pci_err(efx->pci_dev, "devlink registration failed");
1138
1139 rc = efx_register_netdev(efx);
1140 efx_probe_devlink_unlock(efx);
1141 if (!rc)
1142 return 0;
1143
1144 efx_pci_remove_main(efx);
1145 return rc;
1146 }
1147
1148 /* NIC initialisation
1149 *
1150 * This is called at module load (or hotplug insertion,
1151 * theoretically). It sets up PCI mappings, resets the NIC,
1152 * sets up and registers the network devices with the kernel and hooks
1153 * the interrupt service routine. It does not prepare the device for
1154 * transmission; this is left to the first time one of the network
1155 * interfaces is brought up (i.e. efx_net_open).
1156 */
efx_pci_probe(struct pci_dev * pci_dev,const struct pci_device_id * entry)1157 static int efx_pci_probe(struct pci_dev *pci_dev,
1158 const struct pci_device_id *entry)
1159 {
1160 struct efx_probe_data *probe_data, **probe_ptr;
1161 struct net_device *net_dev;
1162 struct efx_nic *efx;
1163 int rc;
1164
1165 /* Allocate probe data and struct efx_nic */
1166 probe_data = kzalloc_obj(*probe_data);
1167 if (!probe_data)
1168 return -ENOMEM;
1169 probe_data->pci_dev = pci_dev;
1170 efx = &probe_data->efx;
1171
1172 /* Allocate and initialise a struct net_device */
1173 net_dev = alloc_etherdev_mq(sizeof(probe_data), EFX_MAX_CORE_TX_QUEUES);
1174 if (!net_dev) {
1175 rc = -ENOMEM;
1176 goto fail0;
1177 }
1178 probe_ptr = netdev_priv(net_dev);
1179 *probe_ptr = probe_data;
1180 efx->net_dev = net_dev;
1181 efx->type = (const struct efx_nic_type *) entry->driver_data;
1182 efx->fixed_features |= NETIF_F_HIGHDMA;
1183
1184 pci_set_drvdata(pci_dev, efx);
1185 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
1186 rc = efx_init_struct(efx, pci_dev);
1187 if (rc)
1188 goto fail1;
1189
1190 pci_info(pci_dev, "Solarflare NIC detected\n");
1191
1192 if (!efx->type->is_vf)
1193 efx_probe_vpd_strings(efx);
1194
1195 /* Set up basic I/O (BAR mappings etc) */
1196 rc = efx_init_io(efx, efx->type->mem_bar(efx), efx->type->max_dma_mask,
1197 efx->type->mem_map_size(efx));
1198 if (rc)
1199 goto fail2;
1200
1201 /* A successful cxl initialization implies a CXL region created to be
1202 * used for PIO buffers. If there is no CXL support legacy PIO buffers
1203 * defined at specific PCI BAR regions will be used. If there is CXL
1204 * support and the cxl initialization fails, the driver probe fails.
1205 */
1206 rc = efx_cxl_init(probe_data);
1207 if (rc) {
1208 pci_err(pci_dev, "CXL initialization failed with error %d\n", rc);
1209 goto fail3;
1210 }
1211
1212 rc = efx_pci_probe_post_io(efx);
1213 if (rc) {
1214 /* On failure, retry once immediately.
1215 * If we aborted probe due to a scheduled reset, dismiss it.
1216 */
1217 efx->reset_pending = 0;
1218 rc = efx_pci_probe_post_io(efx);
1219 if (rc) {
1220 /* On another failure, retry once more
1221 * after a 50-305ms delay.
1222 */
1223 unsigned char r;
1224
1225 get_random_bytes(&r, 1);
1226 msleep((unsigned int)r + 50);
1227 efx->reset_pending = 0;
1228 rc = efx_pci_probe_post_io(efx);
1229 }
1230 }
1231 if (rc)
1232 goto fail3;
1233
1234 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
1235
1236 /* Try to create MTDs, but allow this to fail */
1237 rtnl_lock();
1238 rc = efx_mtd_probe(efx);
1239 rtnl_unlock();
1240 if (rc && rc != -EPERM)
1241 netif_warn(efx, probe, efx->net_dev,
1242 "failed to create MTDs (%d)\n", rc);
1243
1244 if (efx->type->udp_tnl_push_ports)
1245 efx->type->udp_tnl_push_ports(efx);
1246
1247 return 0;
1248
1249 fail3:
1250 efx_cxl_exit(probe_data);
1251 efx_fini_io(efx);
1252 fail2:
1253 efx_fini_struct(efx);
1254 fail1:
1255 WARN_ON(rc > 0);
1256 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
1257 free_netdev(net_dev);
1258 fail0:
1259 kfree(probe_data);
1260 return rc;
1261 }
1262
1263 /* efx_pci_sriov_configure returns the actual number of Virtual Functions
1264 * enabled on success
1265 */
1266 #ifdef CONFIG_SFC_SRIOV
efx_pci_sriov_configure(struct pci_dev * dev,int num_vfs)1267 static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs)
1268 {
1269 int rc;
1270 struct efx_nic *efx = pci_get_drvdata(dev);
1271
1272 if (efx->type->sriov_configure) {
1273 rc = efx->type->sriov_configure(efx, num_vfs);
1274 if (rc)
1275 return rc;
1276 else
1277 return num_vfs;
1278 } else
1279 return -EOPNOTSUPP;
1280 }
1281 #endif
1282
efx_pm_freeze(struct device * dev)1283 static int efx_pm_freeze(struct device *dev)
1284 {
1285 struct efx_nic *efx = dev_get_drvdata(dev);
1286
1287 rtnl_lock();
1288
1289 if (efx_net_active(efx->state)) {
1290 efx_device_detach_sync(efx);
1291
1292 efx_stop_all(efx);
1293 efx_disable_interrupts(efx);
1294
1295 efx->state = efx_freeze(efx->state);
1296 }
1297
1298 rtnl_unlock();
1299
1300 return 0;
1301 }
1302
efx_pci_shutdown(struct pci_dev * pci_dev)1303 static void efx_pci_shutdown(struct pci_dev *pci_dev)
1304 {
1305 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1306
1307 if (!efx)
1308 return;
1309
1310 efx_pm_freeze(&pci_dev->dev);
1311 pci_disable_device(pci_dev);
1312 }
1313
efx_pm_thaw(struct device * dev)1314 static int efx_pm_thaw(struct device *dev)
1315 {
1316 int rc;
1317 struct efx_nic *efx = dev_get_drvdata(dev);
1318
1319 rtnl_lock();
1320
1321 if (efx_frozen(efx->state)) {
1322 rc = efx_enable_interrupts(efx);
1323 if (rc)
1324 goto fail;
1325
1326 mutex_lock(&efx->mac_lock);
1327 efx_mcdi_port_reconfigure(efx);
1328 mutex_unlock(&efx->mac_lock);
1329
1330 efx_start_all(efx);
1331
1332 efx_device_attach_if_not_resetting(efx);
1333
1334 efx->state = efx_thaw(efx->state);
1335
1336 efx->type->resume_wol(efx);
1337 }
1338
1339 rtnl_unlock();
1340
1341 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
1342 efx_queue_reset_work(efx);
1343
1344 return 0;
1345
1346 fail:
1347 rtnl_unlock();
1348
1349 return rc;
1350 }
1351
efx_pm_poweroff(struct device * dev)1352 static int efx_pm_poweroff(struct device *dev)
1353 {
1354 struct pci_dev *pci_dev = to_pci_dev(dev);
1355 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1356
1357 efx->type->fini(efx);
1358
1359 efx->reset_pending = 0;
1360
1361 pci_save_state(pci_dev);
1362 return pci_set_power_state(pci_dev, PCI_D3hot);
1363 }
1364
1365 /* Used for both resume and restore */
efx_pm_resume(struct device * dev)1366 static int efx_pm_resume(struct device *dev)
1367 {
1368 struct pci_dev *pci_dev = to_pci_dev(dev);
1369 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1370 int rc;
1371
1372 rc = pci_set_power_state(pci_dev, PCI_D0);
1373 if (rc)
1374 return rc;
1375 pci_restore_state(pci_dev);
1376 rc = pci_enable_device(pci_dev);
1377 if (rc)
1378 return rc;
1379 pci_set_master(efx->pci_dev);
1380 rc = efx->type->reset(efx, RESET_TYPE_ALL);
1381 if (rc)
1382 return rc;
1383 down_write(&efx->filter_sem);
1384 rc = efx->type->init(efx);
1385 up_write(&efx->filter_sem);
1386 if (rc)
1387 return rc;
1388 rc = efx_pm_thaw(dev);
1389 return rc;
1390 }
1391
efx_pm_suspend(struct device * dev)1392 static int efx_pm_suspend(struct device *dev)
1393 {
1394 int rc;
1395
1396 efx_pm_freeze(dev);
1397 rc = efx_pm_poweroff(dev);
1398 if (rc)
1399 efx_pm_resume(dev);
1400 return rc;
1401 }
1402
1403 static const struct dev_pm_ops efx_pm_ops = {
1404 .suspend = efx_pm_suspend,
1405 .resume = efx_pm_resume,
1406 .freeze = efx_pm_freeze,
1407 .thaw = efx_pm_thaw,
1408 .poweroff = efx_pm_poweroff,
1409 .restore = efx_pm_resume,
1410 };
1411
1412 static struct pci_driver efx_pci_driver = {
1413 .name = KBUILD_MODNAME,
1414 .id_table = efx_pci_table,
1415 .probe = efx_pci_probe,
1416 .remove = efx_pci_remove,
1417 .driver.pm = &efx_pm_ops,
1418 .shutdown = efx_pci_shutdown,
1419 .err_handler = &efx_err_handlers,
1420 #ifdef CONFIG_SFC_SRIOV
1421 .sriov_configure = efx_pci_sriov_configure,
1422 #endif
1423 };
1424
1425 /**************************************************************************
1426 *
1427 * Kernel module interface
1428 *
1429 *************************************************************************/
1430
efx_init_module(void)1431 static int __init efx_init_module(void)
1432 {
1433 int rc;
1434
1435 printk(KERN_INFO "Solarflare NET driver\n");
1436
1437 rc = register_netdevice_notifier(&efx_netdev_notifier);
1438 if (rc)
1439 goto err_notifier;
1440
1441 rc = efx_create_reset_workqueue();
1442 if (rc)
1443 goto err_reset;
1444
1445 rc = pci_register_driver(&efx_pci_driver);
1446 if (rc < 0)
1447 goto err_pci;
1448
1449 rc = pci_register_driver(&ef100_pci_driver);
1450 if (rc < 0)
1451 goto err_pci_ef100;
1452
1453 return 0;
1454
1455 err_pci_ef100:
1456 pci_unregister_driver(&efx_pci_driver);
1457 err_pci:
1458 efx_destroy_reset_workqueue();
1459 err_reset:
1460 unregister_netdevice_notifier(&efx_netdev_notifier);
1461 err_notifier:
1462 return rc;
1463 }
1464
efx_exit_module(void)1465 static void __exit efx_exit_module(void)
1466 {
1467 printk(KERN_INFO "Solarflare NET driver unloading\n");
1468
1469 pci_unregister_driver(&ef100_pci_driver);
1470 pci_unregister_driver(&efx_pci_driver);
1471 efx_destroy_reset_workqueue();
1472 unregister_netdevice_notifier(&efx_netdev_notifier);
1473
1474 }
1475
1476 module_init(efx_init_module);
1477 module_exit(efx_exit_module);
1478
1479 MODULE_AUTHOR("Solarflare Communications and "
1480 "Michael Brown <mbrown@fensystems.co.uk>");
1481 MODULE_DESCRIPTION("Solarflare network driver");
1482 MODULE_LICENSE("GPL");
1483 MODULE_DEVICE_TABLE(pci, efx_pci_table);
1484