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 | |
47 | module_param_named(interrupt_mode, efx_interrupt_mode, uint, 0444); |
48 | MODULE_PARM_DESC(interrupt_mode, |
49 | "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)" ); |
50 | |
51 | module_param(rss_cpus, uint, 0444); |
52 | MODULE_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 | */ |
62 | bool efx_separate_tx_channels; |
63 | module_param(efx_separate_tx_channels, bool, 0444); |
64 | MODULE_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 | */ |
73 | static 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 | */ |
84 | static unsigned int tx_irq_mod_usec = 150; |
85 | |
86 | static bool phy_flash_cfg; |
87 | module_param(phy_flash_cfg, bool, 0644); |
88 | MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially" ); |
89 | |
90 | static 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); |
94 | module_param(debug, uint, 0); |
95 | MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value" ); |
96 | |
97 | /************************************************************************** |
98 | * |
99 | * Utility functions and prototypes |
100 | * |
101 | *************************************************************************/ |
102 | |
103 | static void efx_remove_port(struct efx_nic *efx); |
104 | static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog); |
105 | static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp); |
106 | static 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 | |
115 | static void efx_fini_port(struct efx_nic *efx); |
116 | |
117 | static 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(dev: efx->net_dev, addr: efx->net_dev->perm_addr); |
133 | |
134 | return 0; |
135 | } |
136 | |
137 | static 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(lock: &efx->mac_lock); |
153 | return 0; |
154 | |
155 | fail: |
156 | mutex_unlock(lock: &efx->mac_lock); |
157 | return rc; |
158 | } |
159 | |
160 | static 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 | |
173 | static 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 | |
186 | static LIST_HEAD(efx_primary_list); |
187 | static LIST_HEAD(efx_unassociated_list); |
188 | |
189 | static 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 | |
196 | static 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(new: &efx->node, head: &efx_primary_list); |
205 | |
206 | list_for_each_entry_safe(other, next, &efx_unassociated_list, |
207 | node) { |
208 | if (efx_same_controller(left: efx, right: other)) { |
209 | list_del(entry: &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(new: &other->node, |
215 | head: &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(left: efx, right: 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(new: &efx->node, |
229 | head: &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(new: &efx->node, head: &efx_unassociated_list); |
238 | } |
239 | } |
240 | |
241 | static void efx_dissociate(struct efx_nic *efx) |
242 | { |
243 | struct efx_nic *other, *next; |
244 | |
245 | list_del(entry: &efx->node); |
246 | efx->primary = NULL; |
247 | |
248 | list_for_each_entry_safe(other, next, &efx->secondary_list, node) { |
249 | list_del(entry: &other->node); |
250 | netif_dbg(other, probe, other->net_dev, |
251 | "moving to unassociated list\n" ); |
252 | list_add_tail(new: &other->node, head: &efx_unassociated_list); |
253 | other->primary = NULL; |
254 | } |
255 | } |
256 | |
257 | static 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(buffer: efx->rss_context.rx_hash_key, |
301 | len: sizeof(efx->rss_context.rx_hash_key)); |
302 | efx_set_default_rx_indir_table(efx, ctx: &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_usecs: tx_irq_mod_usec, rx_usecs: rx_irq_mod_usec, rx_adaptive: true, |
307 | rx_may_override_tx: true); |
308 | |
309 | return 0; |
310 | |
311 | fail2: |
312 | efx_remove_interrupts(efx); |
313 | fail1: |
314 | efx->type->remove(efx); |
315 | return rc; |
316 | } |
317 | |
318 | static 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 | |
332 | static 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 | |
391 | static 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 | **************************************************************************/ |
411 | unsigned 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 | |
420 | unsigned 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 */ |
429 | int 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 | |
464 | void 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 | */ |
493 | static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) |
494 | { |
495 | struct efx_nic *efx = efx_netdev_priv(dev: net_dev); |
496 | struct mii_ioctl_data *data = if_mii(rq: ifr); |
497 | |
498 | if (cmd == SIOCSHWTSTAMP) |
499 | return efx_ptp_set_ts_config(efx, ifr); |
500 | if (cmd == SIOCGHWTSTAMP) |
501 | return efx_ptp_get_ts_config(efx, ifr); |
502 | |
503 | /* Convert phy_id from older PRTAD/DEVAD format */ |
504 | if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && |
505 | (data->phy_id & 0xfc00) == 0x0400) |
506 | data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; |
507 | |
508 | return mdio_mii_ioctl(mdio: &efx->mdio, mii_data: data, cmd); |
509 | } |
510 | |
511 | /************************************************************************** |
512 | * |
513 | * Kernel net device interface |
514 | * |
515 | *************************************************************************/ |
516 | |
517 | /* Context: process, rtnl_lock() held. */ |
518 | int efx_net_open(struct net_device *net_dev) |
519 | { |
520 | struct efx_nic *efx = efx_netdev_priv(dev: net_dev); |
521 | int rc; |
522 | |
523 | netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n" , |
524 | raw_smp_processor_id()); |
525 | |
526 | rc = efx_check_disabled(efx); |
527 | if (rc) |
528 | return rc; |
529 | if (efx->phy_mode & PHY_MODE_SPECIAL) |
530 | return -EBUSY; |
531 | if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, method: RESET_TYPE_ALL)) |
532 | return -EIO; |
533 | |
534 | /* Notify the kernel of the link state polled during driver load, |
535 | * before the monitor starts running */ |
536 | efx_link_status_changed(efx); |
537 | |
538 | efx_start_all(efx); |
539 | if (efx->state == STATE_DISABLED || efx->reset_pending) |
540 | netif_device_detach(dev: efx->net_dev); |
541 | else |
542 | efx->state = STATE_NET_UP; |
543 | |
544 | return 0; |
545 | } |
546 | |
547 | /* Context: process, rtnl_lock() held. |
548 | * Note that the kernel will ignore our return code; this method |
549 | * should really be a void. |
550 | */ |
551 | int efx_net_stop(struct net_device *net_dev) |
552 | { |
553 | struct efx_nic *efx = efx_netdev_priv(dev: net_dev); |
554 | |
555 | netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n" , |
556 | raw_smp_processor_id()); |
557 | |
558 | /* Stop the device and flush all the channels */ |
559 | efx_stop_all(efx); |
560 | |
561 | return 0; |
562 | } |
563 | |
564 | static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid) |
565 | { |
566 | struct efx_nic *efx = efx_netdev_priv(dev: net_dev); |
567 | |
568 | if (efx->type->vlan_rx_add_vid) |
569 | return efx->type->vlan_rx_add_vid(efx, proto, vid); |
570 | else |
571 | return -EOPNOTSUPP; |
572 | } |
573 | |
574 | static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid) |
575 | { |
576 | struct efx_nic *efx = efx_netdev_priv(dev: net_dev); |
577 | |
578 | if (efx->type->vlan_rx_kill_vid) |
579 | return efx->type->vlan_rx_kill_vid(efx, proto, vid); |
580 | else |
581 | return -EOPNOTSUPP; |
582 | } |
583 | |
584 | static const struct net_device_ops efx_netdev_ops = { |
585 | .ndo_open = efx_net_open, |
586 | .ndo_stop = efx_net_stop, |
587 | .ndo_get_stats64 = efx_net_stats, |
588 | .ndo_tx_timeout = efx_watchdog, |
589 | .ndo_start_xmit = efx_hard_start_xmit, |
590 | .ndo_validate_addr = eth_validate_addr, |
591 | .ndo_eth_ioctl = efx_ioctl, |
592 | .ndo_change_mtu = efx_change_mtu, |
593 | .ndo_set_mac_address = efx_set_mac_address, |
594 | .ndo_set_rx_mode = efx_set_rx_mode, |
595 | .ndo_set_features = efx_set_features, |
596 | .ndo_features_check = efx_features_check, |
597 | .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid, |
598 | .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid, |
599 | #ifdef CONFIG_SFC_SRIOV |
600 | .ndo_set_vf_mac = efx_sriov_set_vf_mac, |
601 | .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, |
602 | .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, |
603 | .ndo_get_vf_config = efx_sriov_get_vf_config, |
604 | .ndo_set_vf_link_state = efx_sriov_set_vf_link_state, |
605 | #endif |
606 | .ndo_get_phys_port_id = efx_get_phys_port_id, |
607 | .ndo_get_phys_port_name = efx_get_phys_port_name, |
608 | #ifdef CONFIG_RFS_ACCEL |
609 | .ndo_rx_flow_steer = efx_filter_rfs, |
610 | #endif |
611 | .ndo_xdp_xmit = efx_xdp_xmit, |
612 | .ndo_bpf = efx_xdp |
613 | }; |
614 | |
615 | static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog) |
616 | { |
617 | struct bpf_prog *old_prog; |
618 | |
619 | if (efx->xdp_rxq_info_failed) { |
620 | netif_err(efx, drv, efx->net_dev, |
621 | "Unable to bind XDP program due to previous failure of rxq_info\n" ); |
622 | return -EINVAL; |
623 | } |
624 | |
625 | if (prog && efx->net_dev->mtu > efx_xdp_max_mtu(efx)) { |
626 | netif_err(efx, drv, efx->net_dev, |
627 | "Unable to configure XDP with MTU of %d (max: %d)\n" , |
628 | efx->net_dev->mtu, efx_xdp_max_mtu(efx)); |
629 | return -EINVAL; |
630 | } |
631 | |
632 | old_prog = rtnl_dereference(efx->xdp_prog); |
633 | rcu_assign_pointer(efx->xdp_prog, prog); |
634 | /* Release the reference that was originally passed by the caller. */ |
635 | if (old_prog) |
636 | bpf_prog_put(prog: old_prog); |
637 | |
638 | return 0; |
639 | } |
640 | |
641 | /* Context: process, rtnl_lock() held. */ |
642 | static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp) |
643 | { |
644 | struct efx_nic *efx = efx_netdev_priv(dev); |
645 | |
646 | switch (xdp->command) { |
647 | case XDP_SETUP_PROG: |
648 | return efx_xdp_setup_prog(efx, prog: xdp->prog); |
649 | default: |
650 | return -EINVAL; |
651 | } |
652 | } |
653 | |
654 | static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs, |
655 | u32 flags) |
656 | { |
657 | struct efx_nic *efx = efx_netdev_priv(dev); |
658 | |
659 | if (!netif_running(dev)) |
660 | return -EINVAL; |
661 | |
662 | return efx_xdp_tx_buffers(efx, n, xdpfs, flush: flags & XDP_XMIT_FLUSH); |
663 | } |
664 | |
665 | static void efx_update_name(struct efx_nic *efx) |
666 | { |
667 | strcpy(p: efx->name, q: efx->net_dev->name); |
668 | efx_mtd_rename(efx); |
669 | efx_set_channel_names(efx); |
670 | } |
671 | |
672 | static int efx_netdev_event(struct notifier_block *this, |
673 | unsigned long event, void *ptr) |
674 | { |
675 | struct net_device *net_dev = netdev_notifier_info_to_dev(info: ptr); |
676 | |
677 | if ((net_dev->netdev_ops == &efx_netdev_ops) && |
678 | event == NETDEV_CHANGENAME) |
679 | efx_update_name(efx: efx_netdev_priv(dev: net_dev)); |
680 | |
681 | return NOTIFY_DONE; |
682 | } |
683 | |
684 | static struct notifier_block efx_netdev_notifier = { |
685 | .notifier_call = efx_netdev_event, |
686 | }; |
687 | |
688 | static ssize_t phy_type_show(struct device *dev, |
689 | struct device_attribute *attr, char *buf) |
690 | { |
691 | struct efx_nic *efx = dev_get_drvdata(dev); |
692 | return sprintf(buf, fmt: "%d\n" , efx->phy_type); |
693 | } |
694 | static DEVICE_ATTR_RO(phy_type); |
695 | |
696 | static int efx_register_netdev(struct efx_nic *efx) |
697 | { |
698 | struct net_device *net_dev = efx->net_dev; |
699 | struct efx_channel *channel; |
700 | int rc; |
701 | |
702 | net_dev->watchdog_timeo = 5 * HZ; |
703 | net_dev->irq = efx->pci_dev->irq; |
704 | net_dev->netdev_ops = &efx_netdev_ops; |
705 | if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) |
706 | net_dev->priv_flags |= IFF_UNICAST_FLT; |
707 | net_dev->ethtool_ops = &efx_ethtool_ops; |
708 | netif_set_tso_max_segs(dev: net_dev, EFX_TSO_MAX_SEGS); |
709 | net_dev->min_mtu = EFX_MIN_MTU; |
710 | net_dev->max_mtu = EFX_MAX_MTU; |
711 | |
712 | rtnl_lock(); |
713 | |
714 | /* Enable resets to be scheduled and check whether any were |
715 | * already requested. If so, the NIC is probably hosed so we |
716 | * abort. |
717 | */ |
718 | if (efx->reset_pending) { |
719 | pci_err(efx->pci_dev, "aborting probe due to scheduled reset\n" ); |
720 | rc = -EIO; |
721 | goto fail_locked; |
722 | } |
723 | |
724 | rc = dev_alloc_name(dev: net_dev, name: net_dev->name); |
725 | if (rc < 0) |
726 | goto fail_locked; |
727 | efx_update_name(efx); |
728 | |
729 | /* Always start with carrier off; PHY events will detect the link */ |
730 | netif_carrier_off(dev: net_dev); |
731 | |
732 | rc = register_netdevice(dev: net_dev); |
733 | if (rc) |
734 | goto fail_locked; |
735 | |
736 | efx_for_each_channel(channel, efx) { |
737 | struct efx_tx_queue *tx_queue; |
738 | efx_for_each_channel_tx_queue(tx_queue, channel) |
739 | efx_init_tx_queue_core_txq(tx_queue); |
740 | } |
741 | |
742 | efx_associate(efx); |
743 | |
744 | efx->state = STATE_NET_DOWN; |
745 | |
746 | rtnl_unlock(); |
747 | |
748 | rc = device_create_file(device: &efx->pci_dev->dev, entry: &dev_attr_phy_type); |
749 | if (rc) { |
750 | netif_err(efx, drv, efx->net_dev, |
751 | "failed to init net dev attributes\n" ); |
752 | goto fail_registered; |
753 | } |
754 | |
755 | efx_init_mcdi_logging(efx); |
756 | |
757 | return 0; |
758 | |
759 | fail_registered: |
760 | rtnl_lock(); |
761 | efx_dissociate(efx); |
762 | unregister_netdevice(dev: net_dev); |
763 | fail_locked: |
764 | efx->state = STATE_UNINIT; |
765 | rtnl_unlock(); |
766 | netif_err(efx, drv, efx->net_dev, "could not register net dev\n" ); |
767 | return rc; |
768 | } |
769 | |
770 | static void efx_unregister_netdev(struct efx_nic *efx) |
771 | { |
772 | if (!efx->net_dev) |
773 | return; |
774 | |
775 | if (WARN_ON(efx_netdev_priv(efx->net_dev) != efx)) |
776 | return; |
777 | |
778 | if (efx_dev_registered(efx)) { |
779 | strscpy(p: efx->name, q: pci_name(pdev: efx->pci_dev), size: sizeof(efx->name)); |
780 | efx_fini_mcdi_logging(efx); |
781 | device_remove_file(dev: &efx->pci_dev->dev, attr: &dev_attr_phy_type); |
782 | unregister_netdev(dev: efx->net_dev); |
783 | } |
784 | } |
785 | |
786 | /************************************************************************** |
787 | * |
788 | * List of NICs we support |
789 | * |
790 | **************************************************************************/ |
791 | |
792 | /* PCI device ID table */ |
793 | static const struct pci_device_id efx_pci_table[] = { |
794 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */ |
795 | .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, |
796 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */ |
797 | .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, |
798 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */ |
799 | .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, |
800 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */ |
801 | .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, |
802 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */ |
803 | .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, |
804 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */ |
805 | .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, |
806 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0b03), /* SFC9250 PF */ |
807 | .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, |
808 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1b03), /* SFC9250 VF */ |
809 | .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type}, |
810 | {0} /* end of list */ |
811 | }; |
812 | |
813 | /************************************************************************** |
814 | * |
815 | * Data housekeeping |
816 | * |
817 | **************************************************************************/ |
818 | |
819 | void efx_update_sw_stats(struct efx_nic *efx, u64 *stats) |
820 | { |
821 | u64 n_rx_nodesc_trunc = 0; |
822 | struct efx_channel *channel; |
823 | |
824 | efx_for_each_channel(channel, efx) |
825 | n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc; |
826 | stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc; |
827 | stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(v: &efx->n_rx_noskb_drops); |
828 | } |
829 | |
830 | /************************************************************************** |
831 | * |
832 | * PCI interface |
833 | * |
834 | **************************************************************************/ |
835 | |
836 | /* Main body of final NIC shutdown code |
837 | * This is called only at module unload (or hotplug removal). |
838 | */ |
839 | static void efx_pci_remove_main(struct efx_nic *efx) |
840 | { |
841 | /* Flush reset_work. It can no longer be scheduled since we |
842 | * are not READY. |
843 | */ |
844 | WARN_ON(efx_net_active(efx->state)); |
845 | efx_flush_reset_workqueue(efx); |
846 | |
847 | efx_disable_interrupts(efx); |
848 | efx_clear_interrupt_affinity(efx); |
849 | efx_nic_fini_interrupt(efx); |
850 | efx_fini_port(efx); |
851 | efx->type->fini(efx); |
852 | efx_fini_napi(efx); |
853 | efx_remove_all(efx); |
854 | } |
855 | |
856 | /* Final NIC shutdown |
857 | * This is called only at module unload (or hotplug removal). A PF can call |
858 | * this on its VFs to ensure they are unbound first. |
859 | */ |
860 | static void efx_pci_remove(struct pci_dev *pci_dev) |
861 | { |
862 | struct efx_probe_data *probe_data; |
863 | struct efx_nic *efx; |
864 | |
865 | efx = pci_get_drvdata(pdev: pci_dev); |
866 | if (!efx) |
867 | return; |
868 | |
869 | /* Mark the NIC as fini, then stop the interface */ |
870 | rtnl_lock(); |
871 | efx_dissociate(efx); |
872 | dev_close(dev: efx->net_dev); |
873 | efx_disable_interrupts(efx); |
874 | efx->state = STATE_UNINIT; |
875 | rtnl_unlock(); |
876 | |
877 | if (efx->type->sriov_fini) |
878 | efx->type->sriov_fini(efx); |
879 | |
880 | efx_fini_devlink_lock(efx); |
881 | efx_unregister_netdev(efx); |
882 | |
883 | efx_mtd_remove(efx); |
884 | |
885 | efx_pci_remove_main(efx); |
886 | |
887 | efx_fini_io(efx); |
888 | pci_dbg(efx->pci_dev, "shutdown successful\n" ); |
889 | |
890 | efx_fini_devlink_and_unlock(efx); |
891 | efx_fini_struct(efx); |
892 | free_netdev(dev: efx->net_dev); |
893 | probe_data = container_of(efx, struct efx_probe_data, efx); |
894 | kfree(objp: probe_data); |
895 | }; |
896 | |
897 | /* NIC VPD information |
898 | * Called during probe to display the part number of the |
899 | * installed NIC. |
900 | */ |
901 | static void efx_probe_vpd_strings(struct efx_nic *efx) |
902 | { |
903 | struct pci_dev *dev = efx->pci_dev; |
904 | unsigned int vpd_size, kw_len; |
905 | u8 *vpd_data; |
906 | int start; |
907 | |
908 | vpd_data = pci_vpd_alloc(dev, size: &vpd_size); |
909 | if (IS_ERR(ptr: vpd_data)) { |
910 | pci_warn(dev, "Unable to read VPD\n" ); |
911 | return; |
912 | } |
913 | |
914 | start = pci_vpd_find_ro_info_keyword(buf: vpd_data, len: vpd_size, |
915 | PCI_VPD_RO_KEYWORD_PARTNO, size: &kw_len); |
916 | if (start < 0) |
917 | pci_err(dev, "Part number not found or incomplete\n" ); |
918 | else |
919 | pci_info(dev, "Part Number : %.*s\n" , kw_len, vpd_data + start); |
920 | |
921 | start = pci_vpd_find_ro_info_keyword(buf: vpd_data, len: vpd_size, |
922 | PCI_VPD_RO_KEYWORD_SERIALNO, size: &kw_len); |
923 | if (start < 0) |
924 | pci_err(dev, "Serial number not found or incomplete\n" ); |
925 | else |
926 | efx->vpd_sn = kmemdup_nul(s: vpd_data + start, len: kw_len, GFP_KERNEL); |
927 | |
928 | kfree(objp: vpd_data); |
929 | } |
930 | |
931 | |
932 | /* Main body of NIC initialisation |
933 | * This is called at module load (or hotplug insertion, theoretically). |
934 | */ |
935 | static int efx_pci_probe_main(struct efx_nic *efx) |
936 | { |
937 | int rc; |
938 | |
939 | /* Do start-of-day initialisation */ |
940 | rc = efx_probe_all(efx); |
941 | if (rc) |
942 | goto fail1; |
943 | |
944 | efx_init_napi(efx); |
945 | |
946 | down_write(sem: &efx->filter_sem); |
947 | rc = efx->type->init(efx); |
948 | up_write(sem: &efx->filter_sem); |
949 | if (rc) { |
950 | pci_err(efx->pci_dev, "failed to initialise NIC\n" ); |
951 | goto fail3; |
952 | } |
953 | |
954 | rc = efx_init_port(efx); |
955 | if (rc) { |
956 | netif_err(efx, probe, efx->net_dev, |
957 | "failed to initialise port\n" ); |
958 | goto fail4; |
959 | } |
960 | |
961 | rc = efx_nic_init_interrupt(efx); |
962 | if (rc) |
963 | goto fail5; |
964 | |
965 | efx_set_interrupt_affinity(efx); |
966 | rc = efx_enable_interrupts(efx); |
967 | if (rc) |
968 | goto fail6; |
969 | |
970 | return 0; |
971 | |
972 | fail6: |
973 | efx_clear_interrupt_affinity(efx); |
974 | efx_nic_fini_interrupt(efx); |
975 | fail5: |
976 | efx_fini_port(efx); |
977 | fail4: |
978 | efx->type->fini(efx); |
979 | fail3: |
980 | efx_fini_napi(efx); |
981 | efx_remove_all(efx); |
982 | fail1: |
983 | return rc; |
984 | } |
985 | |
986 | static int efx_pci_probe_post_io(struct efx_nic *efx) |
987 | { |
988 | struct net_device *net_dev = efx->net_dev; |
989 | int rc = efx_pci_probe_main(efx); |
990 | |
991 | if (rc) |
992 | return rc; |
993 | |
994 | if (efx->type->sriov_init) { |
995 | rc = efx->type->sriov_init(efx); |
996 | if (rc) |
997 | pci_err(efx->pci_dev, "SR-IOV can't be enabled rc %d\n" , |
998 | rc); |
999 | } |
1000 | |
1001 | /* Determine netdevice features */ |
1002 | net_dev->features |= efx->type->offload_features; |
1003 | |
1004 | /* Add TSO features */ |
1005 | if (efx->type->tso_versions && efx->type->tso_versions(efx)) |
1006 | net_dev->features |= NETIF_F_TSO | NETIF_F_TSO6; |
1007 | |
1008 | /* Mask for features that also apply to VLAN devices */ |
1009 | net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG | |
1010 | NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | |
1011 | NETIF_F_RXCSUM); |
1012 | |
1013 | /* Determine user configurable features */ |
1014 | net_dev->hw_features |= net_dev->features & ~efx->fixed_features; |
1015 | |
1016 | /* Disable receiving frames with bad FCS, by default. */ |
1017 | net_dev->features &= ~NETIF_F_RXALL; |
1018 | |
1019 | /* Disable VLAN filtering by default. It may be enforced if |
1020 | * the feature is fixed (i.e. VLAN filters are required to |
1021 | * receive VLAN tagged packets due to vPort restrictions). |
1022 | */ |
1023 | net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; |
1024 | net_dev->features |= efx->fixed_features; |
1025 | |
1026 | net_dev->xdp_features = NETDEV_XDP_ACT_BASIC | |
1027 | NETDEV_XDP_ACT_REDIRECT | |
1028 | NETDEV_XDP_ACT_NDO_XMIT; |
1029 | |
1030 | /* devlink creation, registration and lock */ |
1031 | rc = efx_probe_devlink_and_lock(efx); |
1032 | if (rc) |
1033 | pci_err(efx->pci_dev, "devlink registration failed" ); |
1034 | |
1035 | rc = efx_register_netdev(efx); |
1036 | efx_probe_devlink_unlock(efx); |
1037 | if (!rc) |
1038 | return 0; |
1039 | |
1040 | efx_pci_remove_main(efx); |
1041 | return rc; |
1042 | } |
1043 | |
1044 | /* NIC initialisation |
1045 | * |
1046 | * This is called at module load (or hotplug insertion, |
1047 | * theoretically). It sets up PCI mappings, resets the NIC, |
1048 | * sets up and registers the network devices with the kernel and hooks |
1049 | * the interrupt service routine. It does not prepare the device for |
1050 | * transmission; this is left to the first time one of the network |
1051 | * interfaces is brought up (i.e. efx_net_open). |
1052 | */ |
1053 | static int efx_pci_probe(struct pci_dev *pci_dev, |
1054 | const struct pci_device_id *entry) |
1055 | { |
1056 | struct efx_probe_data *probe_data, **probe_ptr; |
1057 | struct net_device *net_dev; |
1058 | struct efx_nic *efx; |
1059 | int rc; |
1060 | |
1061 | /* Allocate probe data and struct efx_nic */ |
1062 | probe_data = kzalloc(size: sizeof(*probe_data), GFP_KERNEL); |
1063 | if (!probe_data) |
1064 | return -ENOMEM; |
1065 | probe_data->pci_dev = pci_dev; |
1066 | efx = &probe_data->efx; |
1067 | |
1068 | /* Allocate and initialise a struct net_device */ |
1069 | net_dev = alloc_etherdev_mq(sizeof(probe_data), EFX_MAX_CORE_TX_QUEUES); |
1070 | if (!net_dev) { |
1071 | rc = -ENOMEM; |
1072 | goto fail0; |
1073 | } |
1074 | probe_ptr = netdev_priv(dev: net_dev); |
1075 | *probe_ptr = probe_data; |
1076 | efx->net_dev = net_dev; |
1077 | efx->type = (const struct efx_nic_type *) entry->driver_data; |
1078 | efx->fixed_features |= NETIF_F_HIGHDMA; |
1079 | |
1080 | pci_set_drvdata(pdev: pci_dev, data: efx); |
1081 | SET_NETDEV_DEV(net_dev, &pci_dev->dev); |
1082 | rc = efx_init_struct(efx, pci_dev); |
1083 | if (rc) |
1084 | goto fail1; |
1085 | efx->mdio.dev = net_dev; |
1086 | |
1087 | pci_info(pci_dev, "Solarflare NIC detected\n" ); |
1088 | |
1089 | if (!efx->type->is_vf) |
1090 | efx_probe_vpd_strings(efx); |
1091 | |
1092 | /* Set up basic I/O (BAR mappings etc) */ |
1093 | rc = efx_init_io(efx, bar: efx->type->mem_bar(efx), dma_mask: efx->type->max_dma_mask, |
1094 | mem_map_size: efx->type->mem_map_size(efx)); |
1095 | if (rc) |
1096 | goto fail2; |
1097 | |
1098 | rc = efx_pci_probe_post_io(efx); |
1099 | if (rc) { |
1100 | /* On failure, retry once immediately. |
1101 | * If we aborted probe due to a scheduled reset, dismiss it. |
1102 | */ |
1103 | efx->reset_pending = 0; |
1104 | rc = efx_pci_probe_post_io(efx); |
1105 | if (rc) { |
1106 | /* On another failure, retry once more |
1107 | * after a 50-305ms delay. |
1108 | */ |
1109 | unsigned char r; |
1110 | |
1111 | get_random_bytes(buf: &r, len: 1); |
1112 | msleep(msecs: (unsigned int)r + 50); |
1113 | efx->reset_pending = 0; |
1114 | rc = efx_pci_probe_post_io(efx); |
1115 | } |
1116 | } |
1117 | if (rc) |
1118 | goto fail3; |
1119 | |
1120 | netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n" ); |
1121 | |
1122 | /* Try to create MTDs, but allow this to fail */ |
1123 | rtnl_lock(); |
1124 | rc = efx_mtd_probe(efx); |
1125 | rtnl_unlock(); |
1126 | if (rc && rc != -EPERM) |
1127 | netif_warn(efx, probe, efx->net_dev, |
1128 | "failed to create MTDs (%d)\n" , rc); |
1129 | |
1130 | if (efx->type->udp_tnl_push_ports) |
1131 | efx->type->udp_tnl_push_ports(efx); |
1132 | |
1133 | return 0; |
1134 | |
1135 | fail3: |
1136 | efx_fini_io(efx); |
1137 | fail2: |
1138 | efx_fini_struct(efx); |
1139 | fail1: |
1140 | WARN_ON(rc > 0); |
1141 | netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n" , rc); |
1142 | free_netdev(dev: net_dev); |
1143 | fail0: |
1144 | kfree(objp: probe_data); |
1145 | return rc; |
1146 | } |
1147 | |
1148 | /* efx_pci_sriov_configure returns the actual number of Virtual Functions |
1149 | * enabled on success |
1150 | */ |
1151 | #ifdef CONFIG_SFC_SRIOV |
1152 | static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs) |
1153 | { |
1154 | int rc; |
1155 | struct efx_nic *efx = pci_get_drvdata(pdev: dev); |
1156 | |
1157 | if (efx->type->sriov_configure) { |
1158 | rc = efx->type->sriov_configure(efx, num_vfs); |
1159 | if (rc) |
1160 | return rc; |
1161 | else |
1162 | return num_vfs; |
1163 | } else |
1164 | return -EOPNOTSUPP; |
1165 | } |
1166 | #endif |
1167 | |
1168 | static int efx_pm_freeze(struct device *dev) |
1169 | { |
1170 | struct efx_nic *efx = dev_get_drvdata(dev); |
1171 | |
1172 | rtnl_lock(); |
1173 | |
1174 | if (efx_net_active(state: efx->state)) { |
1175 | efx_device_detach_sync(efx); |
1176 | |
1177 | efx_stop_all(efx); |
1178 | efx_disable_interrupts(efx); |
1179 | |
1180 | efx->state = efx_freeze(state: efx->state); |
1181 | } |
1182 | |
1183 | rtnl_unlock(); |
1184 | |
1185 | return 0; |
1186 | } |
1187 | |
1188 | static void efx_pci_shutdown(struct pci_dev *pci_dev) |
1189 | { |
1190 | struct efx_nic *efx = pci_get_drvdata(pdev: pci_dev); |
1191 | |
1192 | if (!efx) |
1193 | return; |
1194 | |
1195 | efx_pm_freeze(dev: &pci_dev->dev); |
1196 | pci_disable_device(dev: pci_dev); |
1197 | } |
1198 | |
1199 | static int efx_pm_thaw(struct device *dev) |
1200 | { |
1201 | int rc; |
1202 | struct efx_nic *efx = dev_get_drvdata(dev); |
1203 | |
1204 | rtnl_lock(); |
1205 | |
1206 | if (efx_frozen(state: efx->state)) { |
1207 | rc = efx_enable_interrupts(efx); |
1208 | if (rc) |
1209 | goto fail; |
1210 | |
1211 | mutex_lock(&efx->mac_lock); |
1212 | efx_mcdi_port_reconfigure(efx); |
1213 | mutex_unlock(lock: &efx->mac_lock); |
1214 | |
1215 | efx_start_all(efx); |
1216 | |
1217 | efx_device_attach_if_not_resetting(efx); |
1218 | |
1219 | efx->state = efx_thaw(state: efx->state); |
1220 | |
1221 | efx->type->resume_wol(efx); |
1222 | } |
1223 | |
1224 | rtnl_unlock(); |
1225 | |
1226 | /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ |
1227 | efx_queue_reset_work(efx); |
1228 | |
1229 | return 0; |
1230 | |
1231 | fail: |
1232 | rtnl_unlock(); |
1233 | |
1234 | return rc; |
1235 | } |
1236 | |
1237 | static int efx_pm_poweroff(struct device *dev) |
1238 | { |
1239 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1240 | struct efx_nic *efx = pci_get_drvdata(pdev: pci_dev); |
1241 | |
1242 | efx->type->fini(efx); |
1243 | |
1244 | efx->reset_pending = 0; |
1245 | |
1246 | pci_save_state(dev: pci_dev); |
1247 | return pci_set_power_state(dev: pci_dev, PCI_D3hot); |
1248 | } |
1249 | |
1250 | /* Used for both resume and restore */ |
1251 | static int efx_pm_resume(struct device *dev) |
1252 | { |
1253 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1254 | struct efx_nic *efx = pci_get_drvdata(pdev: pci_dev); |
1255 | int rc; |
1256 | |
1257 | rc = pci_set_power_state(dev: pci_dev, PCI_D0); |
1258 | if (rc) |
1259 | return rc; |
1260 | pci_restore_state(dev: pci_dev); |
1261 | rc = pci_enable_device(dev: pci_dev); |
1262 | if (rc) |
1263 | return rc; |
1264 | pci_set_master(dev: efx->pci_dev); |
1265 | rc = efx->type->reset(efx, RESET_TYPE_ALL); |
1266 | if (rc) |
1267 | return rc; |
1268 | down_write(sem: &efx->filter_sem); |
1269 | rc = efx->type->init(efx); |
1270 | up_write(sem: &efx->filter_sem); |
1271 | if (rc) |
1272 | return rc; |
1273 | rc = efx_pm_thaw(dev); |
1274 | return rc; |
1275 | } |
1276 | |
1277 | static int efx_pm_suspend(struct device *dev) |
1278 | { |
1279 | int rc; |
1280 | |
1281 | efx_pm_freeze(dev); |
1282 | rc = efx_pm_poweroff(dev); |
1283 | if (rc) |
1284 | efx_pm_resume(dev); |
1285 | return rc; |
1286 | } |
1287 | |
1288 | static const struct dev_pm_ops efx_pm_ops = { |
1289 | .suspend = efx_pm_suspend, |
1290 | .resume = efx_pm_resume, |
1291 | .freeze = efx_pm_freeze, |
1292 | .thaw = efx_pm_thaw, |
1293 | .poweroff = efx_pm_poweroff, |
1294 | .restore = efx_pm_resume, |
1295 | }; |
1296 | |
1297 | static struct pci_driver efx_pci_driver = { |
1298 | .name = KBUILD_MODNAME, |
1299 | .id_table = efx_pci_table, |
1300 | .probe = efx_pci_probe, |
1301 | .remove = efx_pci_remove, |
1302 | .driver.pm = &efx_pm_ops, |
1303 | .shutdown = efx_pci_shutdown, |
1304 | .err_handler = &efx_err_handlers, |
1305 | #ifdef CONFIG_SFC_SRIOV |
1306 | .sriov_configure = efx_pci_sriov_configure, |
1307 | #endif |
1308 | }; |
1309 | |
1310 | /************************************************************************** |
1311 | * |
1312 | * Kernel module interface |
1313 | * |
1314 | *************************************************************************/ |
1315 | |
1316 | static int __init efx_init_module(void) |
1317 | { |
1318 | int rc; |
1319 | |
1320 | printk(KERN_INFO "Solarflare NET driver\n" ); |
1321 | |
1322 | rc = register_netdevice_notifier(nb: &efx_netdev_notifier); |
1323 | if (rc) |
1324 | goto err_notifier; |
1325 | |
1326 | rc = efx_create_reset_workqueue(); |
1327 | if (rc) |
1328 | goto err_reset; |
1329 | |
1330 | rc = pci_register_driver(&efx_pci_driver); |
1331 | if (rc < 0) |
1332 | goto err_pci; |
1333 | |
1334 | rc = pci_register_driver(&ef100_pci_driver); |
1335 | if (rc < 0) |
1336 | goto err_pci_ef100; |
1337 | |
1338 | return 0; |
1339 | |
1340 | err_pci_ef100: |
1341 | pci_unregister_driver(dev: &efx_pci_driver); |
1342 | err_pci: |
1343 | efx_destroy_reset_workqueue(); |
1344 | err_reset: |
1345 | unregister_netdevice_notifier(nb: &efx_netdev_notifier); |
1346 | err_notifier: |
1347 | return rc; |
1348 | } |
1349 | |
1350 | static void __exit efx_exit_module(void) |
1351 | { |
1352 | printk(KERN_INFO "Solarflare NET driver unloading\n" ); |
1353 | |
1354 | pci_unregister_driver(dev: &ef100_pci_driver); |
1355 | pci_unregister_driver(dev: &efx_pci_driver); |
1356 | efx_destroy_reset_workqueue(); |
1357 | unregister_netdevice_notifier(nb: &efx_netdev_notifier); |
1358 | |
1359 | } |
1360 | |
1361 | module_init(efx_init_module); |
1362 | module_exit(efx_exit_module); |
1363 | |
1364 | MODULE_AUTHOR("Solarflare Communications and " |
1365 | "Michael Brown <mbrown@fensystems.co.uk>" ); |
1366 | MODULE_DESCRIPTION("Solarflare network driver" ); |
1367 | MODULE_LICENSE("GPL" ); |
1368 | MODULE_DEVICE_TABLE(pci, efx_pci_table); |
1369 | |