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