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 "rx_common.h" |
29 | #include "tx_common.h" |
30 | #include "nic.h" |
31 | #include "io.h" |
32 | #include "selftest.h" |
33 | #include "sriov.h" |
34 | #ifdef CONFIG_SFC_SIENA_SRIOV |
35 | #include "siena_sriov.h" |
36 | #endif |
37 | |
38 | #include "mcdi_port_common.h" |
39 | #include "mcdi_pcol.h" |
40 | #include "workarounds.h" |
41 | |
42 | /************************************************************************** |
43 | * |
44 | * Configurable values |
45 | * |
46 | *************************************************************************/ |
47 | |
48 | module_param_named(interrupt_mode, efx_siena_interrupt_mode, uint, 0444); |
49 | MODULE_PARM_DESC(interrupt_mode, |
50 | "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)" ); |
51 | |
52 | module_param_named(rss_cpus, efx_siena_rss_cpus, uint, 0444); |
53 | MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling" ); |
54 | |
55 | /* |
56 | * Use separate channels for TX and RX events |
57 | * |
58 | * Set this to 1 to use separate channels for TX and RX. It allows us |
59 | * to control interrupt affinity separately for TX and RX. |
60 | * |
61 | * This is only used in MSI-X interrupt mode |
62 | */ |
63 | bool efx_siena_separate_tx_channels; |
64 | module_param_named(efx_separate_tx_channels, efx_siena_separate_tx_channels, |
65 | 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 | #define EFX_ASSERT_RESET_SERIALISED(efx) \ |
112 | do { \ |
113 | if ((efx->state == STATE_READY) || \ |
114 | (efx->state == STATE_RECOVERY) || \ |
115 | (efx->state == STATE_DISABLED)) \ |
116 | ASSERT_RTNL(); \ |
117 | } while (0) |
118 | |
119 | /************************************************************************** |
120 | * |
121 | * Port handling |
122 | * |
123 | **************************************************************************/ |
124 | |
125 | static void efx_fini_port(struct efx_nic *efx); |
126 | |
127 | static int efx_probe_port(struct efx_nic *efx) |
128 | { |
129 | int rc; |
130 | |
131 | netif_dbg(efx, probe, efx->net_dev, "create port\n" ); |
132 | |
133 | if (phy_flash_cfg) |
134 | efx->phy_mode = PHY_MODE_SPECIAL; |
135 | |
136 | /* Connect up MAC/PHY operations table */ |
137 | rc = efx->type->probe_port(efx); |
138 | if (rc) |
139 | return rc; |
140 | |
141 | /* Initialise MAC address to permanent address */ |
142 | eth_hw_addr_set(dev: efx->net_dev, addr: efx->net_dev->perm_addr); |
143 | |
144 | return 0; |
145 | } |
146 | |
147 | static int efx_init_port(struct efx_nic *efx) |
148 | { |
149 | int rc; |
150 | |
151 | netif_dbg(efx, drv, efx->net_dev, "init port\n" ); |
152 | |
153 | mutex_lock(&efx->mac_lock); |
154 | |
155 | efx->port_initialized = true; |
156 | |
157 | /* Ensure the PHY advertises the correct flow control settings */ |
158 | rc = efx_siena_mcdi_port_reconfigure(efx); |
159 | if (rc && rc != -EPERM) |
160 | goto fail; |
161 | |
162 | mutex_unlock(lock: &efx->mac_lock); |
163 | return 0; |
164 | |
165 | fail: |
166 | mutex_unlock(lock: &efx->mac_lock); |
167 | return rc; |
168 | } |
169 | |
170 | static void efx_fini_port(struct efx_nic *efx) |
171 | { |
172 | netif_dbg(efx, drv, efx->net_dev, "shut down port\n" ); |
173 | |
174 | if (!efx->port_initialized) |
175 | return; |
176 | |
177 | efx->port_initialized = false; |
178 | |
179 | efx->link_state.up = false; |
180 | efx_siena_link_status_changed(efx); |
181 | } |
182 | |
183 | static void efx_remove_port(struct efx_nic *efx) |
184 | { |
185 | netif_dbg(efx, drv, efx->net_dev, "destroying port\n" ); |
186 | |
187 | efx->type->remove_port(efx); |
188 | } |
189 | |
190 | /************************************************************************** |
191 | * |
192 | * NIC handling |
193 | * |
194 | **************************************************************************/ |
195 | |
196 | static LIST_HEAD(efx_primary_list); |
197 | static LIST_HEAD(efx_unassociated_list); |
198 | |
199 | static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right) |
200 | { |
201 | return left->type == right->type && |
202 | left->vpd_sn && right->vpd_sn && |
203 | !strcmp(left->vpd_sn, right->vpd_sn); |
204 | } |
205 | |
206 | static void efx_associate(struct efx_nic *efx) |
207 | { |
208 | struct efx_nic *other, *next; |
209 | |
210 | if (efx->primary == efx) { |
211 | /* Adding primary function; look for secondaries */ |
212 | |
213 | netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n" ); |
214 | list_add_tail(new: &efx->node, head: &efx_primary_list); |
215 | |
216 | list_for_each_entry_safe(other, next, &efx_unassociated_list, |
217 | node) { |
218 | if (efx_same_controller(left: efx, right: other)) { |
219 | list_del(entry: &other->node); |
220 | netif_dbg(other, probe, other->net_dev, |
221 | "moving to secondary list of %s %s\n" , |
222 | pci_name(efx->pci_dev), |
223 | efx->net_dev->name); |
224 | list_add_tail(new: &other->node, |
225 | head: &efx->secondary_list); |
226 | other->primary = efx; |
227 | } |
228 | } |
229 | } else { |
230 | /* Adding secondary function; look for primary */ |
231 | |
232 | list_for_each_entry(other, &efx_primary_list, node) { |
233 | if (efx_same_controller(left: efx, right: other)) { |
234 | netif_dbg(efx, probe, efx->net_dev, |
235 | "adding to secondary list of %s %s\n" , |
236 | pci_name(other->pci_dev), |
237 | other->net_dev->name); |
238 | list_add_tail(new: &efx->node, |
239 | head: &other->secondary_list); |
240 | efx->primary = other; |
241 | return; |
242 | } |
243 | } |
244 | |
245 | netif_dbg(efx, probe, efx->net_dev, |
246 | "adding to unassociated list\n" ); |
247 | list_add_tail(new: &efx->node, head: &efx_unassociated_list); |
248 | } |
249 | } |
250 | |
251 | static void efx_dissociate(struct efx_nic *efx) |
252 | { |
253 | struct efx_nic *other, *next; |
254 | |
255 | list_del(entry: &efx->node); |
256 | efx->primary = NULL; |
257 | |
258 | list_for_each_entry_safe(other, next, &efx->secondary_list, node) { |
259 | list_del(entry: &other->node); |
260 | netif_dbg(other, probe, other->net_dev, |
261 | "moving to unassociated list\n" ); |
262 | list_add_tail(new: &other->node, head: &efx_unassociated_list); |
263 | other->primary = NULL; |
264 | } |
265 | } |
266 | |
267 | static int efx_probe_nic(struct efx_nic *efx) |
268 | { |
269 | int rc; |
270 | |
271 | netif_dbg(efx, probe, efx->net_dev, "creating NIC\n" ); |
272 | |
273 | /* Carry out hardware-type specific initialisation */ |
274 | rc = efx->type->probe(efx); |
275 | if (rc) |
276 | return rc; |
277 | |
278 | do { |
279 | if (!efx->max_channels || !efx->max_tx_channels) { |
280 | netif_err(efx, drv, efx->net_dev, |
281 | "Insufficient resources to allocate" |
282 | " any channels\n" ); |
283 | rc = -ENOSPC; |
284 | goto fail1; |
285 | } |
286 | |
287 | /* Determine the number of channels and queues by trying |
288 | * to hook in MSI-X interrupts. |
289 | */ |
290 | rc = efx_siena_probe_interrupts(efx); |
291 | if (rc) |
292 | goto fail1; |
293 | |
294 | rc = efx_siena_set_channels(efx); |
295 | if (rc) |
296 | goto fail1; |
297 | |
298 | /* dimension_resources can fail with EAGAIN */ |
299 | rc = efx->type->dimension_resources(efx); |
300 | if (rc != 0 && rc != -EAGAIN) |
301 | goto fail2; |
302 | |
303 | if (rc == -EAGAIN) |
304 | /* try again with new max_channels */ |
305 | efx_siena_remove_interrupts(efx); |
306 | |
307 | } while (rc == -EAGAIN); |
308 | |
309 | if (efx->n_channels > 1) |
310 | netdev_rss_key_fill(buffer: efx->rss_context.rx_hash_key, |
311 | len: sizeof(efx->rss_context.rx_hash_key)); |
312 | efx_siena_set_default_rx_indir_table(efx, ctx: &efx->rss_context); |
313 | |
314 | /* Initialise the interrupt moderation settings */ |
315 | efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000); |
316 | efx_siena_init_irq_moderation(efx, tx_usecs: tx_irq_mod_usec, rx_usecs: rx_irq_mod_usec, |
317 | rx_adaptive: true, rx_may_override_tx: true); |
318 | |
319 | return 0; |
320 | |
321 | fail2: |
322 | efx_siena_remove_interrupts(efx); |
323 | fail1: |
324 | efx->type->remove(efx); |
325 | return rc; |
326 | } |
327 | |
328 | static void efx_remove_nic(struct efx_nic *efx) |
329 | { |
330 | netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n" ); |
331 | |
332 | efx_siena_remove_interrupts(efx); |
333 | efx->type->remove(efx); |
334 | } |
335 | |
336 | /************************************************************************** |
337 | * |
338 | * NIC startup/shutdown |
339 | * |
340 | *************************************************************************/ |
341 | |
342 | static int efx_probe_all(struct efx_nic *efx) |
343 | { |
344 | int rc; |
345 | |
346 | rc = efx_probe_nic(efx); |
347 | if (rc) { |
348 | netif_err(efx, probe, efx->net_dev, "failed to create NIC\n" ); |
349 | goto fail1; |
350 | } |
351 | |
352 | rc = efx_probe_port(efx); |
353 | if (rc) { |
354 | netif_err(efx, probe, efx->net_dev, "failed to create port\n" ); |
355 | goto fail2; |
356 | } |
357 | |
358 | BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); |
359 | if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { |
360 | rc = -EINVAL; |
361 | goto fail3; |
362 | } |
363 | |
364 | #ifdef CONFIG_SFC_SIENA_SRIOV |
365 | rc = efx->type->vswitching_probe(efx); |
366 | if (rc) /* not fatal; the PF will still work fine */ |
367 | netif_warn(efx, probe, efx->net_dev, |
368 | "failed to setup vswitching rc=%d;" |
369 | " VFs may not function\n" , rc); |
370 | #endif |
371 | |
372 | rc = efx_siena_probe_filters(efx); |
373 | if (rc) { |
374 | netif_err(efx, probe, efx->net_dev, |
375 | "failed to create filter tables\n" ); |
376 | goto fail4; |
377 | } |
378 | |
379 | rc = efx_siena_probe_channels(efx); |
380 | if (rc) |
381 | goto fail5; |
382 | |
383 | return 0; |
384 | |
385 | fail5: |
386 | efx_siena_remove_filters(efx); |
387 | fail4: |
388 | #ifdef CONFIG_SFC_SIENA_SRIOV |
389 | efx->type->vswitching_remove(efx); |
390 | #endif |
391 | fail3: |
392 | efx_remove_port(efx); |
393 | fail2: |
394 | efx_remove_nic(efx); |
395 | fail1: |
396 | return rc; |
397 | } |
398 | |
399 | static void efx_remove_all(struct efx_nic *efx) |
400 | { |
401 | rtnl_lock(); |
402 | efx_xdp_setup_prog(efx, NULL); |
403 | rtnl_unlock(); |
404 | |
405 | efx_siena_remove_channels(efx); |
406 | efx_siena_remove_filters(efx); |
407 | #ifdef CONFIG_SFC_SIENA_SRIOV |
408 | efx->type->vswitching_remove(efx); |
409 | #endif |
410 | efx_remove_port(efx); |
411 | efx_remove_nic(efx); |
412 | } |
413 | |
414 | /************************************************************************** |
415 | * |
416 | * Interrupt moderation |
417 | * |
418 | **************************************************************************/ |
419 | unsigned int efx_siena_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs) |
420 | { |
421 | if (usecs == 0) |
422 | return 0; |
423 | if (usecs * 1000 < efx->timer_quantum_ns) |
424 | return 1; /* never round down to 0 */ |
425 | return usecs * 1000 / efx->timer_quantum_ns; |
426 | } |
427 | |
428 | /* Set interrupt moderation parameters */ |
429 | int efx_siena_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_siena_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 = netdev_priv(dev: net_dev); |
496 | struct mii_ioctl_data *data = if_mii(rq: ifr); |
497 | |
498 | /* Convert phy_id from older PRTAD/DEVAD format */ |
499 | if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && |
500 | (data->phy_id & 0xfc00) == 0x0400) |
501 | data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; |
502 | |
503 | return mdio_mii_ioctl(mdio: &efx->mdio, mii_data: data, cmd); |
504 | } |
505 | |
506 | /************************************************************************** |
507 | * |
508 | * Kernel net device interface |
509 | * |
510 | *************************************************************************/ |
511 | |
512 | /* Context: process, rtnl_lock() held. */ |
513 | static int efx_net_open(struct net_device *net_dev) |
514 | { |
515 | struct efx_nic *efx = netdev_priv(dev: net_dev); |
516 | int rc; |
517 | |
518 | netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n" , |
519 | raw_smp_processor_id()); |
520 | |
521 | rc = efx_check_disabled(efx); |
522 | if (rc) |
523 | return rc; |
524 | if (efx->phy_mode & PHY_MODE_SPECIAL) |
525 | return -EBUSY; |
526 | if (efx_siena_mcdi_poll_reboot(efx) && efx_siena_reset(efx, method: RESET_TYPE_ALL)) |
527 | return -EIO; |
528 | |
529 | /* Notify the kernel of the link state polled during driver load, |
530 | * before the monitor starts running */ |
531 | efx_siena_link_status_changed(efx); |
532 | |
533 | efx_siena_start_all(efx); |
534 | if (efx->state == STATE_DISABLED || efx->reset_pending) |
535 | netif_device_detach(dev: efx->net_dev); |
536 | efx_siena_selftest_async_start(efx); |
537 | return 0; |
538 | } |
539 | |
540 | /* Context: process, rtnl_lock() held. |
541 | * Note that the kernel will ignore our return code; this method |
542 | * should really be a void. |
543 | */ |
544 | static int efx_net_stop(struct net_device *net_dev) |
545 | { |
546 | struct efx_nic *efx = netdev_priv(dev: net_dev); |
547 | |
548 | netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n" , |
549 | raw_smp_processor_id()); |
550 | |
551 | /* Stop the device and flush all the channels */ |
552 | efx_siena_stop_all(efx); |
553 | |
554 | return 0; |
555 | } |
556 | |
557 | static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid) |
558 | { |
559 | struct efx_nic *efx = netdev_priv(dev: net_dev); |
560 | |
561 | if (efx->type->vlan_rx_add_vid) |
562 | return efx->type->vlan_rx_add_vid(efx, proto, vid); |
563 | else |
564 | return -EOPNOTSUPP; |
565 | } |
566 | |
567 | static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid) |
568 | { |
569 | struct efx_nic *efx = netdev_priv(dev: net_dev); |
570 | |
571 | if (efx->type->vlan_rx_kill_vid) |
572 | return efx->type->vlan_rx_kill_vid(efx, proto, vid); |
573 | else |
574 | return -EOPNOTSUPP; |
575 | } |
576 | |
577 | static int efx_siena_hwtstamp_set(struct net_device *net_dev, |
578 | struct kernel_hwtstamp_config *config, |
579 | struct netlink_ext_ack *extack) |
580 | { |
581 | struct efx_nic *efx = netdev_priv(dev: net_dev); |
582 | |
583 | return efx_siena_ptp_set_ts_config(efx, config, extack); |
584 | } |
585 | |
586 | static int efx_siena_hwtstamp_get(struct net_device *net_dev, |
587 | struct kernel_hwtstamp_config *config) |
588 | { |
589 | struct efx_nic *efx = netdev_priv(dev: net_dev); |
590 | |
591 | return efx_siena_ptp_get_ts_config(efx, config); |
592 | } |
593 | |
594 | static const struct net_device_ops efx_netdev_ops = { |
595 | .ndo_open = efx_net_open, |
596 | .ndo_stop = efx_net_stop, |
597 | .ndo_get_stats64 = efx_siena_net_stats, |
598 | .ndo_tx_timeout = efx_siena_watchdog, |
599 | .ndo_start_xmit = efx_siena_hard_start_xmit, |
600 | .ndo_validate_addr = eth_validate_addr, |
601 | .ndo_eth_ioctl = efx_ioctl, |
602 | .ndo_change_mtu = efx_siena_change_mtu, |
603 | .ndo_set_mac_address = efx_siena_set_mac_address, |
604 | .ndo_set_rx_mode = efx_siena_set_rx_mode, |
605 | .ndo_set_features = efx_siena_set_features, |
606 | .ndo_features_check = efx_siena_features_check, |
607 | .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid, |
608 | .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid, |
609 | .ndo_hwtstamp_set = efx_siena_hwtstamp_set, |
610 | .ndo_hwtstamp_get = efx_siena_hwtstamp_get, |
611 | #ifdef CONFIG_SFC_SIENA_SRIOV |
612 | .ndo_set_vf_mac = efx_sriov_set_vf_mac, |
613 | .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, |
614 | .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, |
615 | .ndo_get_vf_config = efx_sriov_get_vf_config, |
616 | .ndo_set_vf_link_state = efx_sriov_set_vf_link_state, |
617 | #endif |
618 | .ndo_get_phys_port_id = efx_siena_get_phys_port_id, |
619 | .ndo_get_phys_port_name = efx_siena_get_phys_port_name, |
620 | .ndo_setup_tc = efx_siena_setup_tc, |
621 | #ifdef CONFIG_RFS_ACCEL |
622 | .ndo_rx_flow_steer = efx_siena_filter_rfs, |
623 | #endif |
624 | .ndo_xdp_xmit = efx_xdp_xmit, |
625 | .ndo_bpf = efx_xdp |
626 | }; |
627 | |
628 | static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog) |
629 | { |
630 | struct bpf_prog *old_prog; |
631 | |
632 | if (efx->xdp_rxq_info_failed) { |
633 | netif_err(efx, drv, efx->net_dev, |
634 | "Unable to bind XDP program due to previous failure of rxq_info\n" ); |
635 | return -EINVAL; |
636 | } |
637 | |
638 | if (prog && efx->net_dev->mtu > efx_siena_xdp_max_mtu(efx)) { |
639 | netif_err(efx, drv, efx->net_dev, |
640 | "Unable to configure XDP with MTU of %d (max: %d)\n" , |
641 | efx->net_dev->mtu, efx_siena_xdp_max_mtu(efx)); |
642 | return -EINVAL; |
643 | } |
644 | |
645 | old_prog = rtnl_dereference(efx->xdp_prog); |
646 | rcu_assign_pointer(efx->xdp_prog, prog); |
647 | /* Release the reference that was originally passed by the caller. */ |
648 | if (old_prog) |
649 | bpf_prog_put(prog: old_prog); |
650 | |
651 | return 0; |
652 | } |
653 | |
654 | /* Context: process, rtnl_lock() held. */ |
655 | static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp) |
656 | { |
657 | struct efx_nic *efx = netdev_priv(dev); |
658 | |
659 | switch (xdp->command) { |
660 | case XDP_SETUP_PROG: |
661 | return efx_xdp_setup_prog(efx, prog: xdp->prog); |
662 | default: |
663 | return -EINVAL; |
664 | } |
665 | } |
666 | |
667 | static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs, |
668 | u32 flags) |
669 | { |
670 | struct efx_nic *efx = netdev_priv(dev); |
671 | |
672 | if (!netif_running(dev)) |
673 | return -EINVAL; |
674 | |
675 | return efx_siena_xdp_tx_buffers(efx, n, xdpfs, flush: flags & XDP_XMIT_FLUSH); |
676 | } |
677 | |
678 | static void efx_update_name(struct efx_nic *efx) |
679 | { |
680 | strcpy(p: efx->name, q: efx->net_dev->name); |
681 | efx_siena_mtd_rename(efx); |
682 | efx_siena_set_channel_names(efx); |
683 | } |
684 | |
685 | static int efx_netdev_event(struct notifier_block *this, |
686 | unsigned long event, void *ptr) |
687 | { |
688 | struct net_device *net_dev = netdev_notifier_info_to_dev(info: ptr); |
689 | |
690 | if ((net_dev->netdev_ops == &efx_netdev_ops) && |
691 | event == NETDEV_CHANGENAME) |
692 | efx_update_name(efx: netdev_priv(dev: net_dev)); |
693 | |
694 | return NOTIFY_DONE; |
695 | } |
696 | |
697 | static struct notifier_block efx_netdev_notifier = { |
698 | .notifier_call = efx_netdev_event, |
699 | }; |
700 | |
701 | static ssize_t phy_type_show(struct device *dev, |
702 | struct device_attribute *attr, char *buf) |
703 | { |
704 | struct efx_nic *efx = dev_get_drvdata(dev); |
705 | return sprintf(buf, fmt: "%d\n" , efx->phy_type); |
706 | } |
707 | static DEVICE_ATTR_RO(phy_type); |
708 | |
709 | static int efx_register_netdev(struct efx_nic *efx) |
710 | { |
711 | struct net_device *net_dev = efx->net_dev; |
712 | struct efx_channel *channel; |
713 | int rc; |
714 | |
715 | net_dev->watchdog_timeo = 5 * HZ; |
716 | net_dev->irq = efx->pci_dev->irq; |
717 | net_dev->netdev_ops = &efx_netdev_ops; |
718 | if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) |
719 | net_dev->priv_flags |= IFF_UNICAST_FLT; |
720 | net_dev->ethtool_ops = &efx_siena_ethtool_ops; |
721 | netif_set_tso_max_segs(dev: net_dev, EFX_TSO_MAX_SEGS); |
722 | net_dev->min_mtu = EFX_MIN_MTU; |
723 | net_dev->max_mtu = EFX_MAX_MTU; |
724 | |
725 | rtnl_lock(); |
726 | |
727 | /* Enable resets to be scheduled and check whether any were |
728 | * already requested. If so, the NIC is probably hosed so we |
729 | * abort. |
730 | */ |
731 | efx->state = STATE_READY; |
732 | smp_mb(); /* ensure we change state before checking reset_pending */ |
733 | if (efx->reset_pending) { |
734 | pci_err(efx->pci_dev, "aborting probe due to scheduled reset\n" ); |
735 | rc = -EIO; |
736 | goto fail_locked; |
737 | } |
738 | |
739 | rc = dev_alloc_name(dev: net_dev, name: net_dev->name); |
740 | if (rc < 0) |
741 | goto fail_locked; |
742 | efx_update_name(efx); |
743 | |
744 | /* Always start with carrier off; PHY events will detect the link */ |
745 | netif_carrier_off(dev: net_dev); |
746 | |
747 | rc = register_netdevice(dev: net_dev); |
748 | if (rc) |
749 | goto fail_locked; |
750 | |
751 | efx_for_each_channel(channel, efx) { |
752 | struct efx_tx_queue *tx_queue; |
753 | efx_for_each_channel_tx_queue(tx_queue, channel) |
754 | efx_siena_init_tx_queue_core_txq(tx_queue); |
755 | } |
756 | |
757 | efx_associate(efx); |
758 | |
759 | rtnl_unlock(); |
760 | |
761 | rc = device_create_file(device: &efx->pci_dev->dev, entry: &dev_attr_phy_type); |
762 | if (rc) { |
763 | netif_err(efx, drv, efx->net_dev, |
764 | "failed to init net dev attributes\n" ); |
765 | goto fail_registered; |
766 | } |
767 | |
768 | efx_siena_init_mcdi_logging(efx); |
769 | |
770 | return 0; |
771 | |
772 | fail_registered: |
773 | rtnl_lock(); |
774 | efx_dissociate(efx); |
775 | unregister_netdevice(dev: net_dev); |
776 | fail_locked: |
777 | efx->state = STATE_UNINIT; |
778 | rtnl_unlock(); |
779 | netif_err(efx, drv, efx->net_dev, "could not register net dev\n" ); |
780 | return rc; |
781 | } |
782 | |
783 | static void efx_unregister_netdev(struct efx_nic *efx) |
784 | { |
785 | if (!efx->net_dev) |
786 | return; |
787 | |
788 | BUG_ON(netdev_priv(efx->net_dev) != efx); |
789 | |
790 | if (efx_dev_registered(efx)) { |
791 | strscpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); |
792 | efx_siena_fini_mcdi_logging(efx); |
793 | device_remove_file(dev: &efx->pci_dev->dev, attr: &dev_attr_phy_type); |
794 | unregister_netdev(dev: efx->net_dev); |
795 | } |
796 | } |
797 | |
798 | /************************************************************************** |
799 | * |
800 | * List of NICs we support |
801 | * |
802 | **************************************************************************/ |
803 | |
804 | /* PCI device ID table */ |
805 | static const struct pci_device_id efx_pci_table[] = { |
806 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ |
807 | .driver_data = (unsigned long)&siena_a0_nic_type}, |
808 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ |
809 | .driver_data = (unsigned long)&siena_a0_nic_type}, |
810 | {0} /* end of list */ |
811 | }; |
812 | |
813 | /************************************************************************** |
814 | * |
815 | * Data housekeeping |
816 | * |
817 | **************************************************************************/ |
818 | |
819 | void efx_siena_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 | BUG_ON(efx->state == STATE_READY); |
845 | efx_siena_flush_reset_workqueue(efx); |
846 | |
847 | efx_siena_disable_interrupts(efx); |
848 | efx_siena_clear_interrupt_affinity(efx); |
849 | efx_siena_fini_interrupt(efx); |
850 | efx_fini_port(efx); |
851 | efx->type->fini(efx); |
852 | efx_siena_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_nic *efx; |
863 | |
864 | efx = pci_get_drvdata(pdev: pci_dev); |
865 | if (!efx) |
866 | return; |
867 | |
868 | /* Mark the NIC as fini, then stop the interface */ |
869 | rtnl_lock(); |
870 | efx_dissociate(efx); |
871 | dev_close(dev: efx->net_dev); |
872 | efx_siena_disable_interrupts(efx); |
873 | efx->state = STATE_UNINIT; |
874 | rtnl_unlock(); |
875 | |
876 | if (efx->type->sriov_fini) |
877 | efx->type->sriov_fini(efx); |
878 | |
879 | efx_unregister_netdev(efx); |
880 | |
881 | efx_siena_mtd_remove(efx); |
882 | |
883 | efx_pci_remove_main(efx); |
884 | |
885 | efx_siena_fini_io(efx); |
886 | netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n" ); |
887 | |
888 | efx_siena_fini_struct(efx); |
889 | free_netdev(dev: efx->net_dev); |
890 | }; |
891 | |
892 | /* NIC VPD information |
893 | * Called during probe to display the part number of the |
894 | * installed NIC. |
895 | */ |
896 | static void efx_probe_vpd_strings(struct efx_nic *efx) |
897 | { |
898 | struct pci_dev *dev = efx->pci_dev; |
899 | unsigned int vpd_size, kw_len; |
900 | u8 *vpd_data; |
901 | int start; |
902 | |
903 | vpd_data = pci_vpd_alloc(dev, size: &vpd_size); |
904 | if (IS_ERR(ptr: vpd_data)) { |
905 | pci_warn(dev, "Unable to read VPD\n" ); |
906 | return; |
907 | } |
908 | |
909 | start = pci_vpd_find_ro_info_keyword(buf: vpd_data, len: vpd_size, |
910 | PCI_VPD_RO_KEYWORD_PARTNO, size: &kw_len); |
911 | if (start < 0) |
912 | pci_err(dev, "Part number not found or incomplete\n" ); |
913 | else |
914 | pci_info(dev, "Part Number : %.*s\n" , kw_len, vpd_data + start); |
915 | |
916 | start = pci_vpd_find_ro_info_keyword(buf: vpd_data, len: vpd_size, |
917 | PCI_VPD_RO_KEYWORD_SERIALNO, size: &kw_len); |
918 | if (start < 0) |
919 | pci_err(dev, "Serial number not found or incomplete\n" ); |
920 | else |
921 | efx->vpd_sn = kmemdup_nul(s: vpd_data + start, len: kw_len, GFP_KERNEL); |
922 | |
923 | kfree(objp: vpd_data); |
924 | } |
925 | |
926 | |
927 | /* Main body of NIC initialisation |
928 | * This is called at module load (or hotplug insertion, theoretically). |
929 | */ |
930 | static int efx_pci_probe_main(struct efx_nic *efx) |
931 | { |
932 | int rc; |
933 | |
934 | /* Do start-of-day initialisation */ |
935 | rc = efx_probe_all(efx); |
936 | if (rc) |
937 | goto fail1; |
938 | |
939 | efx_siena_init_napi(efx); |
940 | |
941 | down_write(sem: &efx->filter_sem); |
942 | rc = efx->type->init(efx); |
943 | up_write(sem: &efx->filter_sem); |
944 | if (rc) { |
945 | pci_err(efx->pci_dev, "failed to initialise NIC\n" ); |
946 | goto fail3; |
947 | } |
948 | |
949 | rc = efx_init_port(efx); |
950 | if (rc) { |
951 | netif_err(efx, probe, efx->net_dev, |
952 | "failed to initialise port\n" ); |
953 | goto fail4; |
954 | } |
955 | |
956 | rc = efx_siena_init_interrupt(efx); |
957 | if (rc) |
958 | goto fail5; |
959 | |
960 | efx_siena_set_interrupt_affinity(efx); |
961 | rc = efx_siena_enable_interrupts(efx); |
962 | if (rc) |
963 | goto fail6; |
964 | |
965 | return 0; |
966 | |
967 | fail6: |
968 | efx_siena_clear_interrupt_affinity(efx); |
969 | efx_siena_fini_interrupt(efx); |
970 | fail5: |
971 | efx_fini_port(efx); |
972 | fail4: |
973 | efx->type->fini(efx); |
974 | fail3: |
975 | efx_siena_fini_napi(efx); |
976 | efx_remove_all(efx); |
977 | fail1: |
978 | return rc; |
979 | } |
980 | |
981 | static int efx_pci_probe_post_io(struct efx_nic *efx) |
982 | { |
983 | struct net_device *net_dev = efx->net_dev; |
984 | int rc = efx_pci_probe_main(efx); |
985 | |
986 | if (rc) |
987 | return rc; |
988 | |
989 | if (efx->type->sriov_init) { |
990 | rc = efx->type->sriov_init(efx); |
991 | if (rc) |
992 | pci_err(efx->pci_dev, "SR-IOV can't be enabled rc %d\n" , |
993 | rc); |
994 | } |
995 | |
996 | /* Determine netdevice features */ |
997 | net_dev->features |= (efx->type->offload_features | NETIF_F_SG | |
998 | NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_RXALL); |
999 | if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM)) |
1000 | net_dev->features |= NETIF_F_TSO6; |
1001 | /* Check whether device supports TSO */ |
1002 | if (!efx->type->tso_versions || !efx->type->tso_versions(efx)) |
1003 | net_dev->features &= ~NETIF_F_ALL_TSO; |
1004 | /* Mask for features that also apply to VLAN devices */ |
1005 | net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG | |
1006 | NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | |
1007 | NETIF_F_RXCSUM); |
1008 | |
1009 | net_dev->hw_features |= net_dev->features & ~efx->fixed_features; |
1010 | |
1011 | /* Disable receiving frames with bad FCS, by default. */ |
1012 | net_dev->features &= ~NETIF_F_RXALL; |
1013 | |
1014 | /* Disable VLAN filtering by default. It may be enforced if |
1015 | * the feature is fixed (i.e. VLAN filters are required to |
1016 | * receive VLAN tagged packets due to vPort restrictions). |
1017 | */ |
1018 | net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; |
1019 | net_dev->features |= efx->fixed_features; |
1020 | |
1021 | net_dev->xdp_features = NETDEV_XDP_ACT_BASIC | |
1022 | NETDEV_XDP_ACT_REDIRECT | |
1023 | NETDEV_XDP_ACT_NDO_XMIT; |
1024 | |
1025 | rc = efx_register_netdev(efx); |
1026 | if (!rc) |
1027 | return 0; |
1028 | |
1029 | efx_pci_remove_main(efx); |
1030 | return rc; |
1031 | } |
1032 | |
1033 | /* NIC initialisation |
1034 | * |
1035 | * This is called at module load (or hotplug insertion, |
1036 | * theoretically). It sets up PCI mappings, resets the NIC, |
1037 | * sets up and registers the network devices with the kernel and hooks |
1038 | * the interrupt service routine. It does not prepare the device for |
1039 | * transmission; this is left to the first time one of the network |
1040 | * interfaces is brought up (i.e. efx_net_open). |
1041 | */ |
1042 | static int efx_pci_probe(struct pci_dev *pci_dev, |
1043 | const struct pci_device_id *entry) |
1044 | { |
1045 | struct net_device *net_dev; |
1046 | struct efx_nic *efx; |
1047 | int rc; |
1048 | |
1049 | /* Allocate and initialise a struct net_device and struct efx_nic */ |
1050 | net_dev = alloc_etherdev_mqs(sizeof_priv: sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, |
1051 | EFX_MAX_RX_QUEUES); |
1052 | if (!net_dev) |
1053 | return -ENOMEM; |
1054 | efx = netdev_priv(dev: net_dev); |
1055 | efx->type = (const struct efx_nic_type *) entry->driver_data; |
1056 | efx->fixed_features |= NETIF_F_HIGHDMA; |
1057 | |
1058 | pci_set_drvdata(pdev: pci_dev, data: efx); |
1059 | SET_NETDEV_DEV(net_dev, &pci_dev->dev); |
1060 | rc = efx_siena_init_struct(efx, pci_dev, net_dev); |
1061 | if (rc) |
1062 | goto fail1; |
1063 | |
1064 | pci_info(pci_dev, "Solarflare NIC detected\n" ); |
1065 | |
1066 | if (!efx->type->is_vf) |
1067 | efx_probe_vpd_strings(efx); |
1068 | |
1069 | /* Set up basic I/O (BAR mappings etc) */ |
1070 | rc = efx_siena_init_io(efx, bar: efx->type->mem_bar(efx), |
1071 | dma_mask: efx->type->max_dma_mask, |
1072 | mem_map_size: efx->type->mem_map_size(efx)); |
1073 | if (rc) |
1074 | goto fail2; |
1075 | |
1076 | rc = efx_pci_probe_post_io(efx); |
1077 | if (rc) { |
1078 | /* On failure, retry once immediately. |
1079 | * If we aborted probe due to a scheduled reset, dismiss it. |
1080 | */ |
1081 | efx->reset_pending = 0; |
1082 | rc = efx_pci_probe_post_io(efx); |
1083 | if (rc) { |
1084 | /* On another failure, retry once more |
1085 | * after a 50-305ms delay. |
1086 | */ |
1087 | unsigned char r; |
1088 | |
1089 | get_random_bytes(buf: &r, len: 1); |
1090 | msleep(msecs: (unsigned int)r + 50); |
1091 | efx->reset_pending = 0; |
1092 | rc = efx_pci_probe_post_io(efx); |
1093 | } |
1094 | } |
1095 | if (rc) |
1096 | goto fail3; |
1097 | |
1098 | netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n" ); |
1099 | |
1100 | /* Try to create MTDs, but allow this to fail */ |
1101 | rtnl_lock(); |
1102 | rc = efx_mtd_probe(efx); |
1103 | rtnl_unlock(); |
1104 | if (rc && rc != -EPERM) |
1105 | netif_warn(efx, probe, efx->net_dev, |
1106 | "failed to create MTDs (%d)\n" , rc); |
1107 | |
1108 | if (efx->type->udp_tnl_push_ports) |
1109 | efx->type->udp_tnl_push_ports(efx); |
1110 | |
1111 | return 0; |
1112 | |
1113 | fail3: |
1114 | efx_siena_fini_io(efx); |
1115 | fail2: |
1116 | efx_siena_fini_struct(efx); |
1117 | fail1: |
1118 | WARN_ON(rc > 0); |
1119 | netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n" , rc); |
1120 | free_netdev(dev: net_dev); |
1121 | return rc; |
1122 | } |
1123 | |
1124 | /* efx_pci_sriov_configure returns the actual number of Virtual Functions |
1125 | * enabled on success |
1126 | */ |
1127 | #ifdef CONFIG_SFC_SIENA_SRIOV |
1128 | static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs) |
1129 | { |
1130 | int rc; |
1131 | struct efx_nic *efx = pci_get_drvdata(pdev: dev); |
1132 | |
1133 | if (efx->type->sriov_configure) { |
1134 | rc = efx->type->sriov_configure(efx, num_vfs); |
1135 | if (rc) |
1136 | return rc; |
1137 | else |
1138 | return num_vfs; |
1139 | } else |
1140 | return -EOPNOTSUPP; |
1141 | } |
1142 | #endif |
1143 | |
1144 | static int efx_pm_freeze(struct device *dev) |
1145 | { |
1146 | struct efx_nic *efx = dev_get_drvdata(dev); |
1147 | |
1148 | rtnl_lock(); |
1149 | |
1150 | if (efx->state != STATE_DISABLED) { |
1151 | efx->state = STATE_UNINIT; |
1152 | |
1153 | efx_device_detach_sync(efx); |
1154 | |
1155 | efx_siena_stop_all(efx); |
1156 | efx_siena_disable_interrupts(efx); |
1157 | } |
1158 | |
1159 | rtnl_unlock(); |
1160 | |
1161 | return 0; |
1162 | } |
1163 | |
1164 | static void efx_pci_shutdown(struct pci_dev *pci_dev) |
1165 | { |
1166 | struct efx_nic *efx = pci_get_drvdata(pdev: pci_dev); |
1167 | |
1168 | if (!efx) |
1169 | return; |
1170 | |
1171 | efx_pm_freeze(dev: &pci_dev->dev); |
1172 | pci_disable_device(dev: pci_dev); |
1173 | } |
1174 | |
1175 | static int efx_pm_thaw(struct device *dev) |
1176 | { |
1177 | int rc; |
1178 | struct efx_nic *efx = dev_get_drvdata(dev); |
1179 | |
1180 | rtnl_lock(); |
1181 | |
1182 | if (efx->state != STATE_DISABLED) { |
1183 | rc = efx_siena_enable_interrupts(efx); |
1184 | if (rc) |
1185 | goto fail; |
1186 | |
1187 | mutex_lock(&efx->mac_lock); |
1188 | efx_siena_mcdi_port_reconfigure(efx); |
1189 | mutex_unlock(lock: &efx->mac_lock); |
1190 | |
1191 | efx_siena_start_all(efx); |
1192 | |
1193 | efx_device_attach_if_not_resetting(efx); |
1194 | |
1195 | efx->state = STATE_READY; |
1196 | |
1197 | efx->type->resume_wol(efx); |
1198 | } |
1199 | |
1200 | rtnl_unlock(); |
1201 | |
1202 | /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ |
1203 | efx_siena_queue_reset_work(efx); |
1204 | |
1205 | return 0; |
1206 | |
1207 | fail: |
1208 | rtnl_unlock(); |
1209 | |
1210 | return rc; |
1211 | } |
1212 | |
1213 | static int efx_pm_poweroff(struct device *dev) |
1214 | { |
1215 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1216 | struct efx_nic *efx = pci_get_drvdata(pdev: pci_dev); |
1217 | |
1218 | efx->type->fini(efx); |
1219 | |
1220 | efx->reset_pending = 0; |
1221 | |
1222 | pci_save_state(dev: pci_dev); |
1223 | return pci_set_power_state(dev: pci_dev, PCI_D3hot); |
1224 | } |
1225 | |
1226 | /* Used for both resume and restore */ |
1227 | static int efx_pm_resume(struct device *dev) |
1228 | { |
1229 | struct pci_dev *pci_dev = to_pci_dev(dev); |
1230 | struct efx_nic *efx = pci_get_drvdata(pdev: pci_dev); |
1231 | int rc; |
1232 | |
1233 | rc = pci_set_power_state(dev: pci_dev, PCI_D0); |
1234 | if (rc) |
1235 | return rc; |
1236 | pci_restore_state(dev: pci_dev); |
1237 | rc = pci_enable_device(dev: pci_dev); |
1238 | if (rc) |
1239 | return rc; |
1240 | pci_set_master(dev: efx->pci_dev); |
1241 | rc = efx->type->reset(efx, RESET_TYPE_ALL); |
1242 | if (rc) |
1243 | return rc; |
1244 | down_write(sem: &efx->filter_sem); |
1245 | rc = efx->type->init(efx); |
1246 | up_write(sem: &efx->filter_sem); |
1247 | if (rc) |
1248 | return rc; |
1249 | rc = efx_pm_thaw(dev); |
1250 | return rc; |
1251 | } |
1252 | |
1253 | static int efx_pm_suspend(struct device *dev) |
1254 | { |
1255 | int rc; |
1256 | |
1257 | efx_pm_freeze(dev); |
1258 | rc = efx_pm_poweroff(dev); |
1259 | if (rc) |
1260 | efx_pm_resume(dev); |
1261 | return rc; |
1262 | } |
1263 | |
1264 | static const struct dev_pm_ops efx_pm_ops = { |
1265 | .suspend = efx_pm_suspend, |
1266 | .resume = efx_pm_resume, |
1267 | .freeze = efx_pm_freeze, |
1268 | .thaw = efx_pm_thaw, |
1269 | .poweroff = efx_pm_poweroff, |
1270 | .restore = efx_pm_resume, |
1271 | }; |
1272 | |
1273 | static struct pci_driver efx_pci_driver = { |
1274 | .name = KBUILD_MODNAME, |
1275 | .id_table = efx_pci_table, |
1276 | .probe = efx_pci_probe, |
1277 | .remove = efx_pci_remove, |
1278 | .driver.pm = &efx_pm_ops, |
1279 | .shutdown = efx_pci_shutdown, |
1280 | .err_handler = &efx_siena_err_handlers, |
1281 | #ifdef CONFIG_SFC_SIENA_SRIOV |
1282 | .sriov_configure = efx_pci_sriov_configure, |
1283 | #endif |
1284 | }; |
1285 | |
1286 | /************************************************************************** |
1287 | * |
1288 | * Kernel module interface |
1289 | * |
1290 | *************************************************************************/ |
1291 | |
1292 | static int __init efx_init_module(void) |
1293 | { |
1294 | int rc; |
1295 | |
1296 | pr_info("Solarflare Siena driver\n" ); |
1297 | |
1298 | rc = register_netdevice_notifier(nb: &efx_netdev_notifier); |
1299 | if (rc) |
1300 | goto err_notifier; |
1301 | |
1302 | #ifdef CONFIG_SFC_SIENA_SRIOV |
1303 | rc = efx_init_sriov(); |
1304 | if (rc) |
1305 | goto err_sriov; |
1306 | #endif |
1307 | |
1308 | rc = efx_siena_create_reset_workqueue(); |
1309 | if (rc) |
1310 | goto err_reset; |
1311 | |
1312 | rc = pci_register_driver(&efx_pci_driver); |
1313 | if (rc < 0) |
1314 | goto err_pci; |
1315 | |
1316 | return 0; |
1317 | |
1318 | err_pci: |
1319 | efx_siena_destroy_reset_workqueue(); |
1320 | err_reset: |
1321 | #ifdef CONFIG_SFC_SIENA_SRIOV |
1322 | efx_fini_sriov(); |
1323 | err_sriov: |
1324 | #endif |
1325 | unregister_netdevice_notifier(nb: &efx_netdev_notifier); |
1326 | err_notifier: |
1327 | return rc; |
1328 | } |
1329 | |
1330 | static void __exit efx_exit_module(void) |
1331 | { |
1332 | pr_info("Solarflare Siena driver unloading\n" ); |
1333 | |
1334 | pci_unregister_driver(dev: &efx_pci_driver); |
1335 | efx_siena_destroy_reset_workqueue(); |
1336 | #ifdef CONFIG_SFC_SIENA_SRIOV |
1337 | efx_fini_sriov(); |
1338 | #endif |
1339 | unregister_netdevice_notifier(nb: &efx_netdev_notifier); |
1340 | |
1341 | } |
1342 | |
1343 | module_init(efx_init_module); |
1344 | module_exit(efx_exit_module); |
1345 | |
1346 | MODULE_AUTHOR("Solarflare Communications and " |
1347 | "Michael Brown <mbrown@fensystems.co.uk>" ); |
1348 | MODULE_DESCRIPTION("Solarflare Siena network driver" ); |
1349 | MODULE_LICENSE("GPL" ); |
1350 | MODULE_DEVICE_TABLE(pci, efx_pci_table); |
1351 | |