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
efx_probe_port(struct efx_nic * efx)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(efx->net_dev, efx->net_dev->perm_addr);
143
144 return 0;
145 }
146
efx_init_port(struct efx_nic * efx)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(&efx->mac_lock);
163 return 0;
164
165 fail:
166 mutex_unlock(&efx->mac_lock);
167 return rc;
168 }
169
efx_fini_port(struct efx_nic * efx)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
efx_remove_port(struct efx_nic * efx)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
efx_same_controller(struct efx_nic * left,struct efx_nic * right)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
efx_associate(struct efx_nic * efx)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(&efx->node, &efx_primary_list);
215
216 list_for_each_entry_safe(other, next, &efx_unassociated_list,
217 node) {
218 if (efx_same_controller(efx, other)) {
219 list_del(&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(&other->node,
225 &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(efx, 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(&efx->node,
239 &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(&efx->node, &efx_unassociated_list);
248 }
249 }
250
efx_dissociate(struct efx_nic * efx)251 static void efx_dissociate(struct efx_nic *efx)
252 {
253 struct efx_nic *other, *next;
254
255 list_del(&efx->node);
256 efx->primary = NULL;
257
258 list_for_each_entry_safe(other, next, &efx->secondary_list, node) {
259 list_del(&other->node);
260 netif_dbg(other, probe, other->net_dev,
261 "moving to unassociated list\n");
262 list_add_tail(&other->node, &efx_unassociated_list);
263 other->primary = NULL;
264 }
265 }
266
efx_probe_nic(struct efx_nic * efx)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(efx->rss_context.rx_hash_key,
311 sizeof(efx->rss_context.rx_hash_key));
312 efx_siena_set_default_rx_indir_table(efx, &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_irq_mod_usec, rx_irq_mod_usec,
317 true, 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
efx_remove_nic(struct efx_nic * efx)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
efx_probe_all(struct efx_nic * efx)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
efx_remove_all(struct efx_nic * efx)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 **************************************************************************/
efx_siena_usecs_to_ticks(struct efx_nic * efx,unsigned int usecs)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 */
efx_siena_init_irq_moderation(struct efx_nic * efx,unsigned int tx_usecs,unsigned int rx_usecs,bool rx_adaptive,bool rx_may_override_tx)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
efx_siena_get_irq_moderation(struct efx_nic * efx,unsigned int * tx_usecs,unsigned int * rx_usecs,bool * rx_adaptive)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 */
efx_ioctl(struct net_device * net_dev,struct ifreq * ifr,int cmd)493 static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
494 {
495 struct efx_nic *efx = netdev_priv(net_dev);
496 struct mii_ioctl_data *data = if_mii(ifr);
497
498 if (cmd == SIOCSHWTSTAMP)
499 return efx_siena_ptp_set_ts_config(efx, ifr);
500 if (cmd == SIOCGHWTSTAMP)
501 return efx_siena_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(&efx->mdio, data, cmd);
509 }
510
511 /**************************************************************************
512 *
513 * Kernel net device interface
514 *
515 *************************************************************************/
516
517 /* Context: process, rtnl_lock() held. */
efx_net_open(struct net_device * net_dev)518 static int efx_net_open(struct net_device *net_dev)
519 {
520 struct efx_nic *efx = netdev_priv(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_siena_mcdi_poll_reboot(efx) && efx_siena_reset(efx, 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_siena_link_status_changed(efx);
537
538 efx_siena_start_all(efx);
539 if (efx->state == STATE_DISABLED || efx->reset_pending)
540 netif_device_detach(efx->net_dev);
541 efx_siena_selftest_async_start(efx);
542 return 0;
543 }
544
545 /* Context: process, rtnl_lock() held.
546 * Note that the kernel will ignore our return code; this method
547 * should really be a void.
548 */
efx_net_stop(struct net_device * net_dev)549 static int efx_net_stop(struct net_device *net_dev)
550 {
551 struct efx_nic *efx = netdev_priv(net_dev);
552
553 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
554 raw_smp_processor_id());
555
556 /* Stop the device and flush all the channels */
557 efx_siena_stop_all(efx);
558
559 return 0;
560 }
561
efx_vlan_rx_add_vid(struct net_device * net_dev,__be16 proto,u16 vid)562 static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid)
563 {
564 struct efx_nic *efx = netdev_priv(net_dev);
565
566 if (efx->type->vlan_rx_add_vid)
567 return efx->type->vlan_rx_add_vid(efx, proto, vid);
568 else
569 return -EOPNOTSUPP;
570 }
571
efx_vlan_rx_kill_vid(struct net_device * net_dev,__be16 proto,u16 vid)572 static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid)
573 {
574 struct efx_nic *efx = netdev_priv(net_dev);
575
576 if (efx->type->vlan_rx_kill_vid)
577 return efx->type->vlan_rx_kill_vid(efx, proto, vid);
578 else
579 return -EOPNOTSUPP;
580 }
581
582 static const struct net_device_ops efx_netdev_ops = {
583 .ndo_open = efx_net_open,
584 .ndo_stop = efx_net_stop,
585 .ndo_get_stats64 = efx_siena_net_stats,
586 .ndo_tx_timeout = efx_siena_watchdog,
587 .ndo_start_xmit = efx_siena_hard_start_xmit,
588 .ndo_validate_addr = eth_validate_addr,
589 .ndo_eth_ioctl = efx_ioctl,
590 .ndo_change_mtu = efx_siena_change_mtu,
591 .ndo_set_mac_address = efx_siena_set_mac_address,
592 .ndo_set_rx_mode = efx_siena_set_rx_mode,
593 .ndo_set_features = efx_siena_set_features,
594 .ndo_features_check = efx_siena_features_check,
595 .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid,
596 .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid,
597 #ifdef CONFIG_SFC_SIENA_SRIOV
598 .ndo_set_vf_mac = efx_sriov_set_vf_mac,
599 .ndo_set_vf_vlan = efx_sriov_set_vf_vlan,
600 .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk,
601 .ndo_get_vf_config = efx_sriov_get_vf_config,
602 .ndo_set_vf_link_state = efx_sriov_set_vf_link_state,
603 #endif
604 .ndo_get_phys_port_id = efx_siena_get_phys_port_id,
605 .ndo_get_phys_port_name = efx_siena_get_phys_port_name,
606 .ndo_setup_tc = efx_siena_setup_tc,
607 #ifdef CONFIG_RFS_ACCEL
608 .ndo_rx_flow_steer = efx_siena_filter_rfs,
609 #endif
610 .ndo_xdp_xmit = efx_xdp_xmit,
611 .ndo_bpf = efx_xdp
612 };
613
efx_xdp_setup_prog(struct efx_nic * efx,struct bpf_prog * prog)614 static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog)
615 {
616 struct bpf_prog *old_prog;
617
618 if (efx->xdp_rxq_info_failed) {
619 netif_err(efx, drv, efx->net_dev,
620 "Unable to bind XDP program due to previous failure of rxq_info\n");
621 return -EINVAL;
622 }
623
624 if (prog && efx->net_dev->mtu > efx_siena_xdp_max_mtu(efx)) {
625 netif_err(efx, drv, efx->net_dev,
626 "Unable to configure XDP with MTU of %d (max: %d)\n",
627 efx->net_dev->mtu, efx_siena_xdp_max_mtu(efx));
628 return -EINVAL;
629 }
630
631 old_prog = rtnl_dereference(efx->xdp_prog);
632 rcu_assign_pointer(efx->xdp_prog, prog);
633 /* Release the reference that was originally passed by the caller. */
634 if (old_prog)
635 bpf_prog_put(old_prog);
636
637 return 0;
638 }
639
640 /* Context: process, rtnl_lock() held. */
efx_xdp(struct net_device * dev,struct netdev_bpf * xdp)641 static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp)
642 {
643 struct efx_nic *efx = netdev_priv(dev);
644
645 switch (xdp->command) {
646 case XDP_SETUP_PROG:
647 return efx_xdp_setup_prog(efx, xdp->prog);
648 default:
649 return -EINVAL;
650 }
651 }
652
efx_xdp_xmit(struct net_device * dev,int n,struct xdp_frame ** xdpfs,u32 flags)653 static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
654 u32 flags)
655 {
656 struct efx_nic *efx = netdev_priv(dev);
657
658 if (!netif_running(dev))
659 return -EINVAL;
660
661 return efx_siena_xdp_tx_buffers(efx, n, xdpfs, flags & XDP_XMIT_FLUSH);
662 }
663
efx_update_name(struct efx_nic * efx)664 static void efx_update_name(struct efx_nic *efx)
665 {
666 strcpy(efx->name, efx->net_dev->name);
667 efx_siena_mtd_rename(efx);
668 efx_siena_set_channel_names(efx);
669 }
670
efx_netdev_event(struct notifier_block * this,unsigned long event,void * ptr)671 static int efx_netdev_event(struct notifier_block *this,
672 unsigned long event, void *ptr)
673 {
674 struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
675
676 if ((net_dev->netdev_ops == &efx_netdev_ops) &&
677 event == NETDEV_CHANGENAME)
678 efx_update_name(netdev_priv(net_dev));
679
680 return NOTIFY_DONE;
681 }
682
683 static struct notifier_block efx_netdev_notifier = {
684 .notifier_call = efx_netdev_event,
685 };
686
phy_type_show(struct device * dev,struct device_attribute * attr,char * buf)687 static ssize_t phy_type_show(struct device *dev,
688 struct device_attribute *attr, char *buf)
689 {
690 struct efx_nic *efx = dev_get_drvdata(dev);
691 return sprintf(buf, "%d\n", efx->phy_type);
692 }
693 static DEVICE_ATTR_RO(phy_type);
694
efx_register_netdev(struct efx_nic * efx)695 static int efx_register_netdev(struct efx_nic *efx)
696 {
697 struct net_device *net_dev = efx->net_dev;
698 struct efx_channel *channel;
699 int rc;
700
701 net_dev->watchdog_timeo = 5 * HZ;
702 net_dev->irq = efx->pci_dev->irq;
703 net_dev->netdev_ops = &efx_netdev_ops;
704 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)
705 net_dev->priv_flags |= IFF_UNICAST_FLT;
706 net_dev->ethtool_ops = &efx_siena_ethtool_ops;
707 netif_set_tso_max_segs(net_dev, EFX_TSO_MAX_SEGS);
708 net_dev->min_mtu = EFX_MIN_MTU;
709 net_dev->max_mtu = EFX_MAX_MTU;
710
711 rtnl_lock();
712
713 /* Enable resets to be scheduled and check whether any were
714 * already requested. If so, the NIC is probably hosed so we
715 * abort.
716 */
717 efx->state = STATE_READY;
718 smp_mb(); /* ensure we change state before checking reset_pending */
719 if (efx->reset_pending) {
720 pci_err(efx->pci_dev, "aborting probe due to scheduled reset\n");
721 rc = -EIO;
722 goto fail_locked;
723 }
724
725 rc = dev_alloc_name(net_dev, net_dev->name);
726 if (rc < 0)
727 goto fail_locked;
728 efx_update_name(efx);
729
730 /* Always start with carrier off; PHY events will detect the link */
731 netif_carrier_off(net_dev);
732
733 rc = register_netdevice(net_dev);
734 if (rc)
735 goto fail_locked;
736
737 efx_for_each_channel(channel, efx) {
738 struct efx_tx_queue *tx_queue;
739 efx_for_each_channel_tx_queue(tx_queue, channel)
740 efx_siena_init_tx_queue_core_txq(tx_queue);
741 }
742
743 efx_associate(efx);
744
745 rtnl_unlock();
746
747 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
748 if (rc) {
749 netif_err(efx, drv, efx->net_dev,
750 "failed to init net dev attributes\n");
751 goto fail_registered;
752 }
753
754 efx_siena_init_mcdi_logging(efx);
755
756 return 0;
757
758 fail_registered:
759 rtnl_lock();
760 efx_dissociate(efx);
761 unregister_netdevice(net_dev);
762 fail_locked:
763 efx->state = STATE_UNINIT;
764 rtnl_unlock();
765 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
766 return rc;
767 }
768
efx_unregister_netdev(struct efx_nic * efx)769 static void efx_unregister_netdev(struct efx_nic *efx)
770 {
771 if (!efx->net_dev)
772 return;
773
774 BUG_ON(netdev_priv(efx->net_dev) != efx);
775
776 if (efx_dev_registered(efx)) {
777 strscpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
778 efx_siena_fini_mcdi_logging(efx);
779 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
780 unregister_netdev(efx->net_dev);
781 }
782 }
783
784 /**************************************************************************
785 *
786 * List of NICs we support
787 *
788 **************************************************************************/
789
790 /* PCI device ID table */
791 static const struct pci_device_id efx_pci_table[] = {
792 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */
793 .driver_data = (unsigned long)&siena_a0_nic_type},
794 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */
795 .driver_data = (unsigned long)&siena_a0_nic_type},
796 {0} /* end of list */
797 };
798
799 /**************************************************************************
800 *
801 * Data housekeeping
802 *
803 **************************************************************************/
804
efx_siena_update_sw_stats(struct efx_nic * efx,u64 * stats)805 void efx_siena_update_sw_stats(struct efx_nic *efx, u64 *stats)
806 {
807 u64 n_rx_nodesc_trunc = 0;
808 struct efx_channel *channel;
809
810 efx_for_each_channel(channel, efx)
811 n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;
812 stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;
813 stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);
814 }
815
816 /**************************************************************************
817 *
818 * PCI interface
819 *
820 **************************************************************************/
821
822 /* Main body of final NIC shutdown code
823 * This is called only at module unload (or hotplug removal).
824 */
efx_pci_remove_main(struct efx_nic * efx)825 static void efx_pci_remove_main(struct efx_nic *efx)
826 {
827 /* Flush reset_work. It can no longer be scheduled since we
828 * are not READY.
829 */
830 BUG_ON(efx->state == STATE_READY);
831 efx_siena_flush_reset_workqueue(efx);
832
833 efx_siena_disable_interrupts(efx);
834 efx_siena_clear_interrupt_affinity(efx);
835 efx_siena_fini_interrupt(efx);
836 efx_fini_port(efx);
837 efx->type->fini(efx);
838 efx_siena_fini_napi(efx);
839 efx_remove_all(efx);
840 }
841
842 /* Final NIC shutdown
843 * This is called only at module unload (or hotplug removal). A PF can call
844 * this on its VFs to ensure they are unbound first.
845 */
efx_pci_remove(struct pci_dev * pci_dev)846 static void efx_pci_remove(struct pci_dev *pci_dev)
847 {
848 struct efx_nic *efx;
849
850 efx = pci_get_drvdata(pci_dev);
851 if (!efx)
852 return;
853
854 /* Mark the NIC as fini, then stop the interface */
855 rtnl_lock();
856 efx_dissociate(efx);
857 dev_close(efx->net_dev);
858 efx_siena_disable_interrupts(efx);
859 efx->state = STATE_UNINIT;
860 rtnl_unlock();
861
862 if (efx->type->sriov_fini)
863 efx->type->sriov_fini(efx);
864
865 efx_unregister_netdev(efx);
866
867 efx_siena_mtd_remove(efx);
868
869 efx_pci_remove_main(efx);
870
871 efx_siena_fini_io(efx);
872 netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
873
874 efx_siena_fini_struct(efx);
875 free_netdev(efx->net_dev);
876 };
877
878 /* NIC VPD information
879 * Called during probe to display the part number of the
880 * installed NIC.
881 */
efx_probe_vpd_strings(struct efx_nic * efx)882 static void efx_probe_vpd_strings(struct efx_nic *efx)
883 {
884 struct pci_dev *dev = efx->pci_dev;
885 unsigned int vpd_size, kw_len;
886 u8 *vpd_data;
887 int start;
888
889 vpd_data = pci_vpd_alloc(dev, &vpd_size);
890 if (IS_ERR(vpd_data)) {
891 pci_warn(dev, "Unable to read VPD\n");
892 return;
893 }
894
895 start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
896 PCI_VPD_RO_KEYWORD_PARTNO, &kw_len);
897 if (start < 0)
898 pci_err(dev, "Part number not found or incomplete\n");
899 else
900 pci_info(dev, "Part Number : %.*s\n", kw_len, vpd_data + start);
901
902 start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
903 PCI_VPD_RO_KEYWORD_SERIALNO, &kw_len);
904 if (start < 0)
905 pci_err(dev, "Serial number not found or incomplete\n");
906 else
907 efx->vpd_sn = kmemdup_nul(vpd_data + start, kw_len, GFP_KERNEL);
908
909 kfree(vpd_data);
910 }
911
912
913 /* Main body of NIC initialisation
914 * This is called at module load (or hotplug insertion, theoretically).
915 */
efx_pci_probe_main(struct efx_nic * efx)916 static int efx_pci_probe_main(struct efx_nic *efx)
917 {
918 int rc;
919
920 /* Do start-of-day initialisation */
921 rc = efx_probe_all(efx);
922 if (rc)
923 goto fail1;
924
925 efx_siena_init_napi(efx);
926
927 down_write(&efx->filter_sem);
928 rc = efx->type->init(efx);
929 up_write(&efx->filter_sem);
930 if (rc) {
931 pci_err(efx->pci_dev, "failed to initialise NIC\n");
932 goto fail3;
933 }
934
935 rc = efx_init_port(efx);
936 if (rc) {
937 netif_err(efx, probe, efx->net_dev,
938 "failed to initialise port\n");
939 goto fail4;
940 }
941
942 rc = efx_siena_init_interrupt(efx);
943 if (rc)
944 goto fail5;
945
946 efx_siena_set_interrupt_affinity(efx);
947 rc = efx_siena_enable_interrupts(efx);
948 if (rc)
949 goto fail6;
950
951 return 0;
952
953 fail6:
954 efx_siena_clear_interrupt_affinity(efx);
955 efx_siena_fini_interrupt(efx);
956 fail5:
957 efx_fini_port(efx);
958 fail4:
959 efx->type->fini(efx);
960 fail3:
961 efx_siena_fini_napi(efx);
962 efx_remove_all(efx);
963 fail1:
964 return rc;
965 }
966
efx_pci_probe_post_io(struct efx_nic * efx)967 static int efx_pci_probe_post_io(struct efx_nic *efx)
968 {
969 struct net_device *net_dev = efx->net_dev;
970 int rc = efx_pci_probe_main(efx);
971
972 if (rc)
973 return rc;
974
975 if (efx->type->sriov_init) {
976 rc = efx->type->sriov_init(efx);
977 if (rc)
978 pci_err(efx->pci_dev, "SR-IOV can't be enabled rc %d\n",
979 rc);
980 }
981
982 /* Determine netdevice features */
983 net_dev->features |= (efx->type->offload_features | NETIF_F_SG |
984 NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_RXALL);
985 if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM))
986 net_dev->features |= NETIF_F_TSO6;
987 /* Check whether device supports TSO */
988 if (!efx->type->tso_versions || !efx->type->tso_versions(efx))
989 net_dev->features &= ~NETIF_F_ALL_TSO;
990 /* Mask for features that also apply to VLAN devices */
991 net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG |
992 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |
993 NETIF_F_RXCSUM);
994
995 net_dev->hw_features |= net_dev->features & ~efx->fixed_features;
996
997 /* Disable receiving frames with bad FCS, by default. */
998 net_dev->features &= ~NETIF_F_RXALL;
999
1000 /* Disable VLAN filtering by default. It may be enforced if
1001 * the feature is fixed (i.e. VLAN filters are required to
1002 * receive VLAN tagged packets due to vPort restrictions).
1003 */
1004 net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
1005 net_dev->features |= efx->fixed_features;
1006
1007 net_dev->xdp_features = NETDEV_XDP_ACT_BASIC |
1008 NETDEV_XDP_ACT_REDIRECT |
1009 NETDEV_XDP_ACT_NDO_XMIT;
1010
1011 rc = efx_register_netdev(efx);
1012 if (!rc)
1013 return 0;
1014
1015 efx_pci_remove_main(efx);
1016 return rc;
1017 }
1018
1019 /* NIC initialisation
1020 *
1021 * This is called at module load (or hotplug insertion,
1022 * theoretically). It sets up PCI mappings, resets the NIC,
1023 * sets up and registers the network devices with the kernel and hooks
1024 * the interrupt service routine. It does not prepare the device for
1025 * transmission; this is left to the first time one of the network
1026 * interfaces is brought up (i.e. efx_net_open).
1027 */
efx_pci_probe(struct pci_dev * pci_dev,const struct pci_device_id * entry)1028 static int efx_pci_probe(struct pci_dev *pci_dev,
1029 const struct pci_device_id *entry)
1030 {
1031 struct net_device *net_dev;
1032 struct efx_nic *efx;
1033 int rc;
1034
1035 /* Allocate and initialise a struct net_device and struct efx_nic */
1036 net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES,
1037 EFX_MAX_RX_QUEUES);
1038 if (!net_dev)
1039 return -ENOMEM;
1040 efx = netdev_priv(net_dev);
1041 efx->type = (const struct efx_nic_type *) entry->driver_data;
1042 efx->fixed_features |= NETIF_F_HIGHDMA;
1043
1044 pci_set_drvdata(pci_dev, efx);
1045 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
1046 rc = efx_siena_init_struct(efx, pci_dev, net_dev);
1047 if (rc)
1048 goto fail1;
1049
1050 pci_info(pci_dev, "Solarflare NIC detected\n");
1051
1052 if (!efx->type->is_vf)
1053 efx_probe_vpd_strings(efx);
1054
1055 /* Set up basic I/O (BAR mappings etc) */
1056 rc = efx_siena_init_io(efx, efx->type->mem_bar(efx),
1057 efx->type->max_dma_mask,
1058 efx->type->mem_map_size(efx));
1059 if (rc)
1060 goto fail2;
1061
1062 rc = efx_pci_probe_post_io(efx);
1063 if (rc) {
1064 /* On failure, retry once immediately.
1065 * If we aborted probe due to a scheduled reset, dismiss it.
1066 */
1067 efx->reset_pending = 0;
1068 rc = efx_pci_probe_post_io(efx);
1069 if (rc) {
1070 /* On another failure, retry once more
1071 * after a 50-305ms delay.
1072 */
1073 unsigned char r;
1074
1075 get_random_bytes(&r, 1);
1076 msleep((unsigned int)r + 50);
1077 efx->reset_pending = 0;
1078 rc = efx_pci_probe_post_io(efx);
1079 }
1080 }
1081 if (rc)
1082 goto fail3;
1083
1084 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
1085
1086 /* Try to create MTDs, but allow this to fail */
1087 rtnl_lock();
1088 rc = efx_mtd_probe(efx);
1089 rtnl_unlock();
1090 if (rc && rc != -EPERM)
1091 netif_warn(efx, probe, efx->net_dev,
1092 "failed to create MTDs (%d)\n", rc);
1093
1094 if (efx->type->udp_tnl_push_ports)
1095 efx->type->udp_tnl_push_ports(efx);
1096
1097 return 0;
1098
1099 fail3:
1100 efx_siena_fini_io(efx);
1101 fail2:
1102 efx_siena_fini_struct(efx);
1103 fail1:
1104 WARN_ON(rc > 0);
1105 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
1106 free_netdev(net_dev);
1107 return rc;
1108 }
1109
1110 /* efx_pci_sriov_configure returns the actual number of Virtual Functions
1111 * enabled on success
1112 */
1113 #ifdef CONFIG_SFC_SIENA_SRIOV
efx_pci_sriov_configure(struct pci_dev * dev,int num_vfs)1114 static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs)
1115 {
1116 int rc;
1117 struct efx_nic *efx = pci_get_drvdata(dev);
1118
1119 if (efx->type->sriov_configure) {
1120 rc = efx->type->sriov_configure(efx, num_vfs);
1121 if (rc)
1122 return rc;
1123 else
1124 return num_vfs;
1125 } else
1126 return -EOPNOTSUPP;
1127 }
1128 #endif
1129
efx_pm_freeze(struct device * dev)1130 static int efx_pm_freeze(struct device *dev)
1131 {
1132 struct efx_nic *efx = dev_get_drvdata(dev);
1133
1134 rtnl_lock();
1135
1136 if (efx->state != STATE_DISABLED) {
1137 efx->state = STATE_UNINIT;
1138
1139 efx_device_detach_sync(efx);
1140
1141 efx_siena_stop_all(efx);
1142 efx_siena_disable_interrupts(efx);
1143 }
1144
1145 rtnl_unlock();
1146
1147 return 0;
1148 }
1149
efx_pci_shutdown(struct pci_dev * pci_dev)1150 static void efx_pci_shutdown(struct pci_dev *pci_dev)
1151 {
1152 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1153
1154 if (!efx)
1155 return;
1156
1157 efx_pm_freeze(&pci_dev->dev);
1158 pci_disable_device(pci_dev);
1159 }
1160
efx_pm_thaw(struct device * dev)1161 static int efx_pm_thaw(struct device *dev)
1162 {
1163 int rc;
1164 struct efx_nic *efx = dev_get_drvdata(dev);
1165
1166 rtnl_lock();
1167
1168 if (efx->state != STATE_DISABLED) {
1169 rc = efx_siena_enable_interrupts(efx);
1170 if (rc)
1171 goto fail;
1172
1173 mutex_lock(&efx->mac_lock);
1174 efx_siena_mcdi_port_reconfigure(efx);
1175 mutex_unlock(&efx->mac_lock);
1176
1177 efx_siena_start_all(efx);
1178
1179 efx_device_attach_if_not_resetting(efx);
1180
1181 efx->state = STATE_READY;
1182
1183 efx->type->resume_wol(efx);
1184 }
1185
1186 rtnl_unlock();
1187
1188 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
1189 efx_siena_queue_reset_work(efx);
1190
1191 return 0;
1192
1193 fail:
1194 rtnl_unlock();
1195
1196 return rc;
1197 }
1198
efx_pm_poweroff(struct device * dev)1199 static int efx_pm_poweroff(struct device *dev)
1200 {
1201 struct pci_dev *pci_dev = to_pci_dev(dev);
1202 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1203
1204 efx->type->fini(efx);
1205
1206 efx->reset_pending = 0;
1207
1208 pci_save_state(pci_dev);
1209 return pci_set_power_state(pci_dev, PCI_D3hot);
1210 }
1211
1212 /* Used for both resume and restore */
efx_pm_resume(struct device * dev)1213 static int efx_pm_resume(struct device *dev)
1214 {
1215 struct pci_dev *pci_dev = to_pci_dev(dev);
1216 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1217 int rc;
1218
1219 rc = pci_set_power_state(pci_dev, PCI_D0);
1220 if (rc)
1221 return rc;
1222 pci_restore_state(pci_dev);
1223 rc = pci_enable_device(pci_dev);
1224 if (rc)
1225 return rc;
1226 pci_set_master(efx->pci_dev);
1227 rc = efx->type->reset(efx, RESET_TYPE_ALL);
1228 if (rc)
1229 return rc;
1230 down_write(&efx->filter_sem);
1231 rc = efx->type->init(efx);
1232 up_write(&efx->filter_sem);
1233 if (rc)
1234 return rc;
1235 rc = efx_pm_thaw(dev);
1236 return rc;
1237 }
1238
efx_pm_suspend(struct device * dev)1239 static int efx_pm_suspend(struct device *dev)
1240 {
1241 int rc;
1242
1243 efx_pm_freeze(dev);
1244 rc = efx_pm_poweroff(dev);
1245 if (rc)
1246 efx_pm_resume(dev);
1247 return rc;
1248 }
1249
1250 static const struct dev_pm_ops efx_pm_ops = {
1251 .suspend = efx_pm_suspend,
1252 .resume = efx_pm_resume,
1253 .freeze = efx_pm_freeze,
1254 .thaw = efx_pm_thaw,
1255 .poweroff = efx_pm_poweroff,
1256 .restore = efx_pm_resume,
1257 };
1258
1259 static struct pci_driver efx_pci_driver = {
1260 .name = KBUILD_MODNAME,
1261 .id_table = efx_pci_table,
1262 .probe = efx_pci_probe,
1263 .remove = efx_pci_remove,
1264 .driver.pm = &efx_pm_ops,
1265 .shutdown = efx_pci_shutdown,
1266 .err_handler = &efx_siena_err_handlers,
1267 #ifdef CONFIG_SFC_SIENA_SRIOV
1268 .sriov_configure = efx_pci_sriov_configure,
1269 #endif
1270 };
1271
1272 /**************************************************************************
1273 *
1274 * Kernel module interface
1275 *
1276 *************************************************************************/
1277
efx_init_module(void)1278 static int __init efx_init_module(void)
1279 {
1280 int rc;
1281
1282 pr_info("Solarflare Siena driver\n");
1283
1284 rc = register_netdevice_notifier(&efx_netdev_notifier);
1285 if (rc)
1286 goto err_notifier;
1287
1288 #ifdef CONFIG_SFC_SIENA_SRIOV
1289 rc = efx_init_sriov();
1290 if (rc)
1291 goto err_sriov;
1292 #endif
1293
1294 rc = efx_siena_create_reset_workqueue();
1295 if (rc)
1296 goto err_reset;
1297
1298 rc = pci_register_driver(&efx_pci_driver);
1299 if (rc < 0)
1300 goto err_pci;
1301
1302 return 0;
1303
1304 err_pci:
1305 efx_siena_destroy_reset_workqueue();
1306 err_reset:
1307 #ifdef CONFIG_SFC_SIENA_SRIOV
1308 efx_fini_sriov();
1309 err_sriov:
1310 #endif
1311 unregister_netdevice_notifier(&efx_netdev_notifier);
1312 err_notifier:
1313 return rc;
1314 }
1315
efx_exit_module(void)1316 static void __exit efx_exit_module(void)
1317 {
1318 pr_info("Solarflare Siena driver unloading\n");
1319
1320 pci_unregister_driver(&efx_pci_driver);
1321 efx_siena_destroy_reset_workqueue();
1322 #ifdef CONFIG_SFC_SIENA_SRIOV
1323 efx_fini_sriov();
1324 #endif
1325 unregister_netdevice_notifier(&efx_netdev_notifier);
1326
1327 }
1328
1329 module_init(efx_init_module);
1330 module_exit(efx_exit_module);
1331
1332 MODULE_AUTHOR("Solarflare Communications and "
1333 "Michael Brown <mbrown@fensystems.co.uk>");
1334 MODULE_DESCRIPTION("Solarflare Siena network driver");
1335 MODULE_LICENSE("GPL");
1336 MODULE_DEVICE_TABLE(pci, efx_pci_table);
1337