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/aer.h>
22 #include <linux/interrupt.h>
23 #include "net_driver.h"
24 #include <net/gre.h>
25 #include <net/udp_tunnel.h>
26 #include "efx.h"
27 #include "efx_common.h"
28 #include "efx_channels.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 #ifdef CONFIG_SFC_SIENA_SRIOV
36 #include "siena_sriov.h"
37 #endif
38
39 #include "mcdi_port_common.h"
40 #include "mcdi_pcol.h"
41 #include "workarounds.h"
42
43 /**************************************************************************
44 *
45 * Configurable values
46 *
47 *************************************************************************/
48
49 module_param_named(interrupt_mode, efx_siena_interrupt_mode, uint, 0444);
50 MODULE_PARM_DESC(interrupt_mode,
51 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
52
53 module_param_named(rss_cpus, efx_siena_rss_cpus, uint, 0444);
54 MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling");
55
56 /*
57 * Use separate channels for TX and RX events
58 *
59 * Set this to 1 to use separate channels for TX and RX. It allows us
60 * to control interrupt affinity separately for TX and RX.
61 *
62 * This is only used in MSI-X interrupt mode
63 */
64 bool efx_siena_separate_tx_channels;
65 module_param_named(efx_separate_tx_channels, efx_siena_separate_tx_channels,
66 bool, 0444);
67 MODULE_PARM_DESC(efx_separate_tx_channels,
68 "Use separate channels for TX and RX");
69
70 /* Initial interrupt moderation settings. They can be modified after
71 * module load with ethtool.
72 *
73 * The default for RX should strike a balance between increasing the
74 * round-trip latency and reducing overhead.
75 */
76 static unsigned int rx_irq_mod_usec = 60;
77
78 /* Initial interrupt moderation settings. They can be modified after
79 * module load with ethtool.
80 *
81 * This default is chosen to ensure that a 10G link does not go idle
82 * while a TX queue is stopped after it has become full. A queue is
83 * restarted when it drops below half full. The time this takes (assuming
84 * worst case 3 descriptors per packet and 1024 descriptors) is
85 * 512 / 3 * 1.2 = 205 usec.
86 */
87 static unsigned int tx_irq_mod_usec = 150;
88
89 static bool phy_flash_cfg;
90 module_param(phy_flash_cfg, bool, 0644);
91 MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially");
92
93 static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
94 NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
95 NETIF_MSG_IFUP | NETIF_MSG_RX_ERR |
96 NETIF_MSG_TX_ERR | NETIF_MSG_HW);
97 module_param(debug, uint, 0);
98 MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value");
99
100 /**************************************************************************
101 *
102 * Utility functions and prototypes
103 *
104 *************************************************************************/
105
106 static void efx_remove_port(struct efx_nic *efx);
107 static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog);
108 static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp);
109 static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
110 u32 flags);
111
112 #define EFX_ASSERT_RESET_SERIALISED(efx) \
113 do { \
114 if ((efx->state == STATE_READY) || \
115 (efx->state == STATE_RECOVERY) || \
116 (efx->state == STATE_DISABLED)) \
117 ASSERT_RTNL(); \
118 } while (0)
119
120 /**************************************************************************
121 *
122 * Port handling
123 *
124 **************************************************************************/
125
126 static void efx_fini_port(struct efx_nic *efx);
127
efx_probe_port(struct efx_nic * efx)128 static int efx_probe_port(struct efx_nic *efx)
129 {
130 int rc;
131
132 netif_dbg(efx, probe, efx->net_dev, "create port\n");
133
134 if (phy_flash_cfg)
135 efx->phy_mode = PHY_MODE_SPECIAL;
136
137 /* Connect up MAC/PHY operations table */
138 rc = efx->type->probe_port(efx);
139 if (rc)
140 return rc;
141
142 /* Initialise MAC address to permanent address */
143 eth_hw_addr_set(efx->net_dev, efx->net_dev->perm_addr);
144
145 return 0;
146 }
147
efx_init_port(struct efx_nic * efx)148 static int efx_init_port(struct efx_nic *efx)
149 {
150 int rc;
151
152 netif_dbg(efx, drv, efx->net_dev, "init port\n");
153
154 mutex_lock(&efx->mac_lock);
155
156 efx->port_initialized = true;
157
158 /* Ensure the PHY advertises the correct flow control settings */
159 rc = efx_siena_mcdi_port_reconfigure(efx);
160 if (rc && rc != -EPERM)
161 goto fail;
162
163 mutex_unlock(&efx->mac_lock);
164 return 0;
165
166 fail:
167 mutex_unlock(&efx->mac_lock);
168 return rc;
169 }
170
efx_fini_port(struct efx_nic * efx)171 static void efx_fini_port(struct efx_nic *efx)
172 {
173 netif_dbg(efx, drv, efx->net_dev, "shut down port\n");
174
175 if (!efx->port_initialized)
176 return;
177
178 efx->port_initialized = false;
179
180 efx->link_state.up = false;
181 efx_siena_link_status_changed(efx);
182 }
183
efx_remove_port(struct efx_nic * efx)184 static void efx_remove_port(struct efx_nic *efx)
185 {
186 netif_dbg(efx, drv, efx->net_dev, "destroying port\n");
187
188 efx->type->remove_port(efx);
189 }
190
191 /**************************************************************************
192 *
193 * NIC handling
194 *
195 **************************************************************************/
196
197 static LIST_HEAD(efx_primary_list);
198 static LIST_HEAD(efx_unassociated_list);
199
efx_same_controller(struct efx_nic * left,struct efx_nic * right)200 static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right)
201 {
202 return left->type == right->type &&
203 left->vpd_sn && right->vpd_sn &&
204 !strcmp(left->vpd_sn, right->vpd_sn);
205 }
206
efx_associate(struct efx_nic * efx)207 static void efx_associate(struct efx_nic *efx)
208 {
209 struct efx_nic *other, *next;
210
211 if (efx->primary == efx) {
212 /* Adding primary function; look for secondaries */
213
214 netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n");
215 list_add_tail(&efx->node, &efx_primary_list);
216
217 list_for_each_entry_safe(other, next, &efx_unassociated_list,
218 node) {
219 if (efx_same_controller(efx, other)) {
220 list_del(&other->node);
221 netif_dbg(other, probe, other->net_dev,
222 "moving to secondary list of %s %s\n",
223 pci_name(efx->pci_dev),
224 efx->net_dev->name);
225 list_add_tail(&other->node,
226 &efx->secondary_list);
227 other->primary = efx;
228 }
229 }
230 } else {
231 /* Adding secondary function; look for primary */
232
233 list_for_each_entry(other, &efx_primary_list, node) {
234 if (efx_same_controller(efx, other)) {
235 netif_dbg(efx, probe, efx->net_dev,
236 "adding to secondary list of %s %s\n",
237 pci_name(other->pci_dev),
238 other->net_dev->name);
239 list_add_tail(&efx->node,
240 &other->secondary_list);
241 efx->primary = other;
242 return;
243 }
244 }
245
246 netif_dbg(efx, probe, efx->net_dev,
247 "adding to unassociated list\n");
248 list_add_tail(&efx->node, &efx_unassociated_list);
249 }
250 }
251
efx_dissociate(struct efx_nic * efx)252 static void efx_dissociate(struct efx_nic *efx)
253 {
254 struct efx_nic *other, *next;
255
256 list_del(&efx->node);
257 efx->primary = NULL;
258
259 list_for_each_entry_safe(other, next, &efx->secondary_list, node) {
260 list_del(&other->node);
261 netif_dbg(other, probe, other->net_dev,
262 "moving to unassociated list\n");
263 list_add_tail(&other->node, &efx_unassociated_list);
264 other->primary = NULL;
265 }
266 }
267
efx_probe_nic(struct efx_nic * efx)268 static int efx_probe_nic(struct efx_nic *efx)
269 {
270 int rc;
271
272 netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
273
274 /* Carry out hardware-type specific initialisation */
275 rc = efx->type->probe(efx);
276 if (rc)
277 return rc;
278
279 do {
280 if (!efx->max_channels || !efx->max_tx_channels) {
281 netif_err(efx, drv, efx->net_dev,
282 "Insufficient resources to allocate"
283 " any channels\n");
284 rc = -ENOSPC;
285 goto fail1;
286 }
287
288 /* Determine the number of channels and queues by trying
289 * to hook in MSI-X interrupts.
290 */
291 rc = efx_siena_probe_interrupts(efx);
292 if (rc)
293 goto fail1;
294
295 rc = efx_siena_set_channels(efx);
296 if (rc)
297 goto fail1;
298
299 /* dimension_resources can fail with EAGAIN */
300 rc = efx->type->dimension_resources(efx);
301 if (rc != 0 && rc != -EAGAIN)
302 goto fail2;
303
304 if (rc == -EAGAIN)
305 /* try again with new max_channels */
306 efx_siena_remove_interrupts(efx);
307
308 } while (rc == -EAGAIN);
309
310 if (efx->n_channels > 1)
311 netdev_rss_key_fill(efx->rss_context.rx_hash_key,
312 sizeof(efx->rss_context.rx_hash_key));
313 efx_siena_set_default_rx_indir_table(efx, &efx->rss_context);
314
315 /* Initialise the interrupt moderation settings */
316 efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000);
317 efx_siena_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec,
318 true, true);
319
320 return 0;
321
322 fail2:
323 efx_siena_remove_interrupts(efx);
324 fail1:
325 efx->type->remove(efx);
326 return rc;
327 }
328
efx_remove_nic(struct efx_nic * efx)329 static void efx_remove_nic(struct efx_nic *efx)
330 {
331 netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");
332
333 efx_siena_remove_interrupts(efx);
334 efx->type->remove(efx);
335 }
336
337 /**************************************************************************
338 *
339 * NIC startup/shutdown
340 *
341 *************************************************************************/
342
efx_probe_all(struct efx_nic * efx)343 static int efx_probe_all(struct efx_nic *efx)
344 {
345 int rc;
346
347 rc = efx_probe_nic(efx);
348 if (rc) {
349 netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
350 goto fail1;
351 }
352
353 rc = efx_probe_port(efx);
354 if (rc) {
355 netif_err(efx, probe, efx->net_dev, "failed to create port\n");
356 goto fail2;
357 }
358
359 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT);
360 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) {
361 rc = -EINVAL;
362 goto fail3;
363 }
364
365 #ifdef CONFIG_SFC_SIENA_SRIOV
366 rc = efx->type->vswitching_probe(efx);
367 if (rc) /* not fatal; the PF will still work fine */
368 netif_warn(efx, probe, efx->net_dev,
369 "failed to setup vswitching rc=%d;"
370 " VFs may not function\n", rc);
371 #endif
372
373 rc = efx_siena_probe_filters(efx);
374 if (rc) {
375 netif_err(efx, probe, efx->net_dev,
376 "failed to create filter tables\n");
377 goto fail4;
378 }
379
380 rc = efx_siena_probe_channels(efx);
381 if (rc)
382 goto fail5;
383
384 return 0;
385
386 fail5:
387 efx_siena_remove_filters(efx);
388 fail4:
389 #ifdef CONFIG_SFC_SIENA_SRIOV
390 efx->type->vswitching_remove(efx);
391 #endif
392 fail3:
393 efx_remove_port(efx);
394 fail2:
395 efx_remove_nic(efx);
396 fail1:
397 return rc;
398 }
399
efx_remove_all(struct efx_nic * efx)400 static void efx_remove_all(struct efx_nic *efx)
401 {
402 rtnl_lock();
403 efx_xdp_setup_prog(efx, NULL);
404 rtnl_unlock();
405
406 efx_siena_remove_channels(efx);
407 efx_siena_remove_filters(efx);
408 #ifdef CONFIG_SFC_SIENA_SRIOV
409 efx->type->vswitching_remove(efx);
410 #endif
411 efx_remove_port(efx);
412 efx_remove_nic(efx);
413 }
414
415 /**************************************************************************
416 *
417 * Interrupt moderation
418 *
419 **************************************************************************/
efx_siena_usecs_to_ticks(struct efx_nic * efx,unsigned int usecs)420 unsigned int efx_siena_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs)
421 {
422 if (usecs == 0)
423 return 0;
424 if (usecs * 1000 < efx->timer_quantum_ns)
425 return 1; /* never round down to 0 */
426 return usecs * 1000 / efx->timer_quantum_ns;
427 }
428
429 /* 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)430 int efx_siena_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
431 unsigned int rx_usecs, bool rx_adaptive,
432 bool rx_may_override_tx)
433 {
434 struct efx_channel *channel;
435 unsigned int timer_max_us;
436
437 EFX_ASSERT_RESET_SERIALISED(efx);
438
439 timer_max_us = efx->timer_max_ns / 1000;
440
441 if (tx_usecs > timer_max_us || rx_usecs > timer_max_us)
442 return -EINVAL;
443
444 if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 &&
445 !rx_may_override_tx) {
446 netif_err(efx, drv, efx->net_dev, "Channels are shared. "
447 "RX and TX IRQ moderation must be equal\n");
448 return -EINVAL;
449 }
450
451 efx->irq_rx_adaptive = rx_adaptive;
452 efx->irq_rx_moderation_us = rx_usecs;
453 efx_for_each_channel(channel, efx) {
454 if (efx_channel_has_rx_queue(channel))
455 channel->irq_moderation_us = rx_usecs;
456 else if (efx_channel_has_tx_queues(channel))
457 channel->irq_moderation_us = tx_usecs;
458 else if (efx_channel_is_xdp_tx(channel))
459 channel->irq_moderation_us = tx_usecs;
460 }
461
462 return 0;
463 }
464
efx_siena_get_irq_moderation(struct efx_nic * efx,unsigned int * tx_usecs,unsigned int * rx_usecs,bool * rx_adaptive)465 void efx_siena_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
466 unsigned int *rx_usecs, bool *rx_adaptive)
467 {
468 *rx_adaptive = efx->irq_rx_adaptive;
469 *rx_usecs = efx->irq_rx_moderation_us;
470
471 /* If channels are shared between RX and TX, so is IRQ
472 * moderation. Otherwise, IRQ moderation is the same for all
473 * TX channels and is not adaptive.
474 */
475 if (efx->tx_channel_offset == 0) {
476 *tx_usecs = *rx_usecs;
477 } else {
478 struct efx_channel *tx_channel;
479
480 tx_channel = efx->channel[efx->tx_channel_offset];
481 *tx_usecs = tx_channel->irq_moderation_us;
482 }
483 }
484
485 /**************************************************************************
486 *
487 * ioctls
488 *
489 *************************************************************************/
490
491 /* Net device ioctl
492 * Context: process, rtnl_lock() held.
493 */
efx_ioctl(struct net_device * net_dev,struct ifreq * ifr,int cmd)494 static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
495 {
496 struct efx_nic *efx = netdev_priv(net_dev);
497 struct mii_ioctl_data *data = if_mii(ifr);
498
499 if (cmd == SIOCSHWTSTAMP)
500 return efx_siena_ptp_set_ts_config(efx, ifr);
501 if (cmd == SIOCGHWTSTAMP)
502 return efx_siena_ptp_get_ts_config(efx, ifr);
503
504 /* Convert phy_id from older PRTAD/DEVAD format */
505 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
506 (data->phy_id & 0xfc00) == 0x0400)
507 data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;
508
509 return mdio_mii_ioctl(&efx->mdio, data, cmd);
510 }
511
512 /**************************************************************************
513 *
514 * Kernel net device interface
515 *
516 *************************************************************************/
517
518 /* Context: process, rtnl_lock() held. */
efx_net_open(struct net_device * net_dev)519 static int efx_net_open(struct net_device *net_dev)
520 {
521 struct efx_nic *efx = netdev_priv(net_dev);
522 int rc;
523
524 netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
525 raw_smp_processor_id());
526
527 rc = efx_check_disabled(efx);
528 if (rc)
529 return rc;
530 if (efx->phy_mode & PHY_MODE_SPECIAL)
531 return -EBUSY;
532 if (efx_siena_mcdi_poll_reboot(efx) && efx_siena_reset(efx, RESET_TYPE_ALL))
533 return -EIO;
534
535 /* Notify the kernel of the link state polled during driver load,
536 * before the monitor starts running */
537 efx_siena_link_status_changed(efx);
538
539 efx_siena_start_all(efx);
540 if (efx->state == STATE_DISABLED || efx->reset_pending)
541 netif_device_detach(efx->net_dev);
542 efx_siena_selftest_async_start(efx);
543 return 0;
544 }
545
546 /* Context: process, rtnl_lock() held.
547 * Note that the kernel will ignore our return code; this method
548 * should really be a void.
549 */
efx_net_stop(struct net_device * net_dev)550 static int efx_net_stop(struct net_device *net_dev)
551 {
552 struct efx_nic *efx = netdev_priv(net_dev);
553
554 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
555 raw_smp_processor_id());
556
557 /* Stop the device and flush all the channels */
558 efx_siena_stop_all(efx);
559
560 return 0;
561 }
562
efx_vlan_rx_add_vid(struct net_device * net_dev,__be16 proto,u16 vid)563 static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid)
564 {
565 struct efx_nic *efx = netdev_priv(net_dev);
566
567 if (efx->type->vlan_rx_add_vid)
568 return efx->type->vlan_rx_add_vid(efx, proto, vid);
569 else
570 return -EOPNOTSUPP;
571 }
572
efx_vlan_rx_kill_vid(struct net_device * net_dev,__be16 proto,u16 vid)573 static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid)
574 {
575 struct efx_nic *efx = netdev_priv(net_dev);
576
577 if (efx->type->vlan_rx_kill_vid)
578 return efx->type->vlan_rx_kill_vid(efx, proto, vid);
579 else
580 return -EOPNOTSUPP;
581 }
582
583 static const struct net_device_ops efx_netdev_ops = {
584 .ndo_open = efx_net_open,
585 .ndo_stop = efx_net_stop,
586 .ndo_get_stats64 = efx_siena_net_stats,
587 .ndo_tx_timeout = efx_siena_watchdog,
588 .ndo_start_xmit = efx_siena_hard_start_xmit,
589 .ndo_validate_addr = eth_validate_addr,
590 .ndo_eth_ioctl = efx_ioctl,
591 .ndo_change_mtu = efx_siena_change_mtu,
592 .ndo_set_mac_address = efx_siena_set_mac_address,
593 .ndo_set_rx_mode = efx_siena_set_rx_mode,
594 .ndo_set_features = efx_siena_set_features,
595 .ndo_features_check = efx_siena_features_check,
596 .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid,
597 .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid,
598 #ifdef CONFIG_SFC_SIENA_SRIOV
599 .ndo_set_vf_mac = efx_sriov_set_vf_mac,
600 .ndo_set_vf_vlan = efx_sriov_set_vf_vlan,
601 .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk,
602 .ndo_get_vf_config = efx_sriov_get_vf_config,
603 .ndo_set_vf_link_state = efx_sriov_set_vf_link_state,
604 #endif
605 .ndo_get_phys_port_id = efx_siena_get_phys_port_id,
606 .ndo_get_phys_port_name = efx_siena_get_phys_port_name,
607 .ndo_setup_tc = efx_siena_setup_tc,
608 #ifdef CONFIG_RFS_ACCEL
609 .ndo_rx_flow_steer = efx_siena_filter_rfs,
610 #endif
611 .ndo_xdp_xmit = efx_xdp_xmit,
612 .ndo_bpf = efx_xdp
613 };
614
efx_xdp_setup_prog(struct efx_nic * efx,struct bpf_prog * prog)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_siena_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_siena_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(old_prog);
637
638 return 0;
639 }
640
641 /* Context: process, rtnl_lock() held. */
efx_xdp(struct net_device * dev,struct netdev_bpf * xdp)642 static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp)
643 {
644 struct efx_nic *efx = netdev_priv(dev);
645
646 switch (xdp->command) {
647 case XDP_SETUP_PROG:
648 return efx_xdp_setup_prog(efx, xdp->prog);
649 default:
650 return -EINVAL;
651 }
652 }
653
efx_xdp_xmit(struct net_device * dev,int n,struct xdp_frame ** xdpfs,u32 flags)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 = netdev_priv(dev);
658
659 if (!netif_running(dev))
660 return -EINVAL;
661
662 return efx_siena_xdp_tx_buffers(efx, n, xdpfs, flags & XDP_XMIT_FLUSH);
663 }
664
efx_update_name(struct efx_nic * efx)665 static void efx_update_name(struct efx_nic *efx)
666 {
667 strcpy(efx->name, efx->net_dev->name);
668 efx_siena_mtd_rename(efx);
669 efx_siena_set_channel_names(efx);
670 }
671
efx_netdev_event(struct notifier_block * this,unsigned long event,void * ptr)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(ptr);
676
677 if ((net_dev->netdev_ops == &efx_netdev_ops) &&
678 event == NETDEV_CHANGENAME)
679 efx_update_name(netdev_priv(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
phy_type_show(struct device * dev,struct device_attribute * attr,char * buf)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, "%d\n", efx->phy_type);
693 }
694 static DEVICE_ATTR_RO(phy_type);
695
efx_register_netdev(struct efx_nic * efx)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_siena_ethtool_ops;
708 netif_set_tso_max_segs(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 efx->state = STATE_READY;
719 smp_mb(); /* ensure we change state before checking reset_pending */
720 if (efx->reset_pending) {
721 pci_err(efx->pci_dev, "aborting probe due to scheduled reset\n");
722 rc = -EIO;
723 goto fail_locked;
724 }
725
726 rc = dev_alloc_name(net_dev, net_dev->name);
727 if (rc < 0)
728 goto fail_locked;
729 efx_update_name(efx);
730
731 /* Always start with carrier off; PHY events will detect the link */
732 netif_carrier_off(net_dev);
733
734 rc = register_netdevice(net_dev);
735 if (rc)
736 goto fail_locked;
737
738 efx_for_each_channel(channel, efx) {
739 struct efx_tx_queue *tx_queue;
740 efx_for_each_channel_tx_queue(tx_queue, channel)
741 efx_siena_init_tx_queue_core_txq(tx_queue);
742 }
743
744 efx_associate(efx);
745
746 rtnl_unlock();
747
748 rc = device_create_file(&efx->pci_dev->dev, &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_siena_init_mcdi_logging(efx);
756
757 return 0;
758
759 fail_registered:
760 rtnl_lock();
761 efx_dissociate(efx);
762 unregister_netdevice(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
efx_unregister_netdev(struct efx_nic * efx)770 static void efx_unregister_netdev(struct efx_nic *efx)
771 {
772 if (!efx->net_dev)
773 return;
774
775 BUG_ON(netdev_priv(efx->net_dev) != efx);
776
777 if (efx_dev_registered(efx)) {
778 strscpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
779 efx_siena_fini_mcdi_logging(efx);
780 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
781 unregister_netdev(efx->net_dev);
782 }
783 }
784
785 /**************************************************************************
786 *
787 * List of NICs we support
788 *
789 **************************************************************************/
790
791 /* PCI device ID table */
792 static const struct pci_device_id efx_pci_table[] = {
793 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */
794 .driver_data = (unsigned long)&siena_a0_nic_type},
795 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */
796 .driver_data = (unsigned long)&siena_a0_nic_type},
797 {0} /* end of list */
798 };
799
800 /**************************************************************************
801 *
802 * Data housekeeping
803 *
804 **************************************************************************/
805
efx_siena_update_sw_stats(struct efx_nic * efx,u64 * stats)806 void efx_siena_update_sw_stats(struct efx_nic *efx, u64 *stats)
807 {
808 u64 n_rx_nodesc_trunc = 0;
809 struct efx_channel *channel;
810
811 efx_for_each_channel(channel, efx)
812 n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;
813 stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;
814 stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);
815 }
816
817 /**************************************************************************
818 *
819 * PCI interface
820 *
821 **************************************************************************/
822
823 /* Main body of final NIC shutdown code
824 * This is called only at module unload (or hotplug removal).
825 */
efx_pci_remove_main(struct efx_nic * efx)826 static void efx_pci_remove_main(struct efx_nic *efx)
827 {
828 /* Flush reset_work. It can no longer be scheduled since we
829 * are not READY.
830 */
831 BUG_ON(efx->state == STATE_READY);
832 efx_siena_flush_reset_workqueue(efx);
833
834 efx_siena_disable_interrupts(efx);
835 efx_siena_clear_interrupt_affinity(efx);
836 efx_siena_fini_interrupt(efx);
837 efx_fini_port(efx);
838 efx->type->fini(efx);
839 efx_siena_fini_napi(efx);
840 efx_remove_all(efx);
841 }
842
843 /* Final NIC shutdown
844 * This is called only at module unload (or hotplug removal). A PF can call
845 * this on its VFs to ensure they are unbound first.
846 */
efx_pci_remove(struct pci_dev * pci_dev)847 static void efx_pci_remove(struct pci_dev *pci_dev)
848 {
849 struct efx_nic *efx;
850
851 efx = pci_get_drvdata(pci_dev);
852 if (!efx)
853 return;
854
855 /* Mark the NIC as fini, then stop the interface */
856 rtnl_lock();
857 efx_dissociate(efx);
858 dev_close(efx->net_dev);
859 efx_siena_disable_interrupts(efx);
860 efx->state = STATE_UNINIT;
861 rtnl_unlock();
862
863 if (efx->type->sriov_fini)
864 efx->type->sriov_fini(efx);
865
866 efx_unregister_netdev(efx);
867
868 efx_siena_mtd_remove(efx);
869
870 efx_pci_remove_main(efx);
871
872 efx_siena_fini_io(efx);
873 netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
874
875 efx_siena_fini_struct(efx);
876 free_netdev(efx->net_dev);
877
878 pci_disable_pcie_error_reporting(pci_dev);
879 };
880
881 /* NIC VPD information
882 * Called during probe to display the part number of the
883 * installed NIC.
884 */
efx_probe_vpd_strings(struct efx_nic * efx)885 static void efx_probe_vpd_strings(struct efx_nic *efx)
886 {
887 struct pci_dev *dev = efx->pci_dev;
888 unsigned int vpd_size, kw_len;
889 u8 *vpd_data;
890 int start;
891
892 vpd_data = pci_vpd_alloc(dev, &vpd_size);
893 if (IS_ERR(vpd_data)) {
894 pci_warn(dev, "Unable to read VPD\n");
895 return;
896 }
897
898 start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
899 PCI_VPD_RO_KEYWORD_PARTNO, &kw_len);
900 if (start < 0)
901 pci_err(dev, "Part number not found or incomplete\n");
902 else
903 pci_info(dev, "Part Number : %.*s\n", kw_len, vpd_data + start);
904
905 start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
906 PCI_VPD_RO_KEYWORD_SERIALNO, &kw_len);
907 if (start < 0)
908 pci_err(dev, "Serial number not found or incomplete\n");
909 else
910 efx->vpd_sn = kmemdup_nul(vpd_data + start, kw_len, GFP_KERNEL);
911
912 kfree(vpd_data);
913 }
914
915
916 /* Main body of NIC initialisation
917 * This is called at module load (or hotplug insertion, theoretically).
918 */
efx_pci_probe_main(struct efx_nic * efx)919 static int efx_pci_probe_main(struct efx_nic *efx)
920 {
921 int rc;
922
923 /* Do start-of-day initialisation */
924 rc = efx_probe_all(efx);
925 if (rc)
926 goto fail1;
927
928 efx_siena_init_napi(efx);
929
930 down_write(&efx->filter_sem);
931 rc = efx->type->init(efx);
932 up_write(&efx->filter_sem);
933 if (rc) {
934 pci_err(efx->pci_dev, "failed to initialise NIC\n");
935 goto fail3;
936 }
937
938 rc = efx_init_port(efx);
939 if (rc) {
940 netif_err(efx, probe, efx->net_dev,
941 "failed to initialise port\n");
942 goto fail4;
943 }
944
945 rc = efx_siena_init_interrupt(efx);
946 if (rc)
947 goto fail5;
948
949 efx_siena_set_interrupt_affinity(efx);
950 rc = efx_siena_enable_interrupts(efx);
951 if (rc)
952 goto fail6;
953
954 return 0;
955
956 fail6:
957 efx_siena_clear_interrupt_affinity(efx);
958 efx_siena_fini_interrupt(efx);
959 fail5:
960 efx_fini_port(efx);
961 fail4:
962 efx->type->fini(efx);
963 fail3:
964 efx_siena_fini_napi(efx);
965 efx_remove_all(efx);
966 fail1:
967 return rc;
968 }
969
efx_pci_probe_post_io(struct efx_nic * efx)970 static int efx_pci_probe_post_io(struct efx_nic *efx)
971 {
972 struct net_device *net_dev = efx->net_dev;
973 int rc = efx_pci_probe_main(efx);
974
975 if (rc)
976 return rc;
977
978 if (efx->type->sriov_init) {
979 rc = efx->type->sriov_init(efx);
980 if (rc)
981 pci_err(efx->pci_dev, "SR-IOV can't be enabled rc %d\n",
982 rc);
983 }
984
985 /* Determine netdevice features */
986 net_dev->features |= (efx->type->offload_features | NETIF_F_SG |
987 NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_RXALL);
988 if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM))
989 net_dev->features |= NETIF_F_TSO6;
990 /* Check whether device supports TSO */
991 if (!efx->type->tso_versions || !efx->type->tso_versions(efx))
992 net_dev->features &= ~NETIF_F_ALL_TSO;
993 /* Mask for features that also apply to VLAN devices */
994 net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG |
995 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |
996 NETIF_F_RXCSUM);
997
998 net_dev->hw_features |= net_dev->features & ~efx->fixed_features;
999
1000 /* Disable receiving frames with bad FCS, by default. */
1001 net_dev->features &= ~NETIF_F_RXALL;
1002
1003 /* Disable VLAN filtering by default. It may be enforced if
1004 * the feature is fixed (i.e. VLAN filters are required to
1005 * receive VLAN tagged packets due to vPort restrictions).
1006 */
1007 net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
1008 net_dev->features |= efx->fixed_features;
1009
1010 rc = efx_register_netdev(efx);
1011 if (!rc)
1012 return 0;
1013
1014 efx_pci_remove_main(efx);
1015 return rc;
1016 }
1017
1018 /* NIC initialisation
1019 *
1020 * This is called at module load (or hotplug insertion,
1021 * theoretically). It sets up PCI mappings, resets the NIC,
1022 * sets up and registers the network devices with the kernel and hooks
1023 * the interrupt service routine. It does not prepare the device for
1024 * transmission; this is left to the first time one of the network
1025 * interfaces is brought up (i.e. efx_net_open).
1026 */
efx_pci_probe(struct pci_dev * pci_dev,const struct pci_device_id * entry)1027 static int efx_pci_probe(struct pci_dev *pci_dev,
1028 const struct pci_device_id *entry)
1029 {
1030 struct net_device *net_dev;
1031 struct efx_nic *efx;
1032 int rc;
1033
1034 /* Allocate and initialise a struct net_device and struct efx_nic */
1035 net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES,
1036 EFX_MAX_RX_QUEUES);
1037 if (!net_dev)
1038 return -ENOMEM;
1039 efx = netdev_priv(net_dev);
1040 efx->type = (const struct efx_nic_type *) entry->driver_data;
1041 efx->fixed_features |= NETIF_F_HIGHDMA;
1042
1043 pci_set_drvdata(pci_dev, efx);
1044 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
1045 rc = efx_siena_init_struct(efx, pci_dev, net_dev);
1046 if (rc)
1047 goto fail1;
1048
1049 pci_info(pci_dev, "Solarflare NIC detected\n");
1050
1051 if (!efx->type->is_vf)
1052 efx_probe_vpd_strings(efx);
1053
1054 /* Set up basic I/O (BAR mappings etc) */
1055 rc = efx_siena_init_io(efx, efx->type->mem_bar(efx),
1056 efx->type->max_dma_mask,
1057 efx->type->mem_map_size(efx));
1058 if (rc)
1059 goto fail2;
1060
1061 rc = efx_pci_probe_post_io(efx);
1062 if (rc) {
1063 /* On failure, retry once immediately.
1064 * If we aborted probe due to a scheduled reset, dismiss it.
1065 */
1066 efx->reset_pending = 0;
1067 rc = efx_pci_probe_post_io(efx);
1068 if (rc) {
1069 /* On another failure, retry once more
1070 * after a 50-305ms delay.
1071 */
1072 unsigned char r;
1073
1074 get_random_bytes(&r, 1);
1075 msleep((unsigned int)r + 50);
1076 efx->reset_pending = 0;
1077 rc = efx_pci_probe_post_io(efx);
1078 }
1079 }
1080 if (rc)
1081 goto fail3;
1082
1083 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
1084
1085 /* Try to create MTDs, but allow this to fail */
1086 rtnl_lock();
1087 rc = efx_mtd_probe(efx);
1088 rtnl_unlock();
1089 if (rc && rc != -EPERM)
1090 netif_warn(efx, probe, efx->net_dev,
1091 "failed to create MTDs (%d)\n", rc);
1092
1093 (void)pci_enable_pcie_error_reporting(pci_dev);
1094
1095 if (efx->type->udp_tnl_push_ports)
1096 efx->type->udp_tnl_push_ports(efx);
1097
1098 return 0;
1099
1100 fail3:
1101 efx_siena_fini_io(efx);
1102 fail2:
1103 efx_siena_fini_struct(efx);
1104 fail1:
1105 WARN_ON(rc > 0);
1106 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
1107 free_netdev(net_dev);
1108 return rc;
1109 }
1110
1111 /* efx_pci_sriov_configure returns the actual number of Virtual Functions
1112 * enabled on success
1113 */
1114 #ifdef CONFIG_SFC_SIENA_SRIOV
efx_pci_sriov_configure(struct pci_dev * dev,int num_vfs)1115 static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs)
1116 {
1117 int rc;
1118 struct efx_nic *efx = pci_get_drvdata(dev);
1119
1120 if (efx->type->sriov_configure) {
1121 rc = efx->type->sriov_configure(efx, num_vfs);
1122 if (rc)
1123 return rc;
1124 else
1125 return num_vfs;
1126 } else
1127 return -EOPNOTSUPP;
1128 }
1129 #endif
1130
efx_pm_freeze(struct device * dev)1131 static int efx_pm_freeze(struct device *dev)
1132 {
1133 struct efx_nic *efx = dev_get_drvdata(dev);
1134
1135 rtnl_lock();
1136
1137 if (efx->state != STATE_DISABLED) {
1138 efx->state = STATE_UNINIT;
1139
1140 efx_device_detach_sync(efx);
1141
1142 efx_siena_stop_all(efx);
1143 efx_siena_disable_interrupts(efx);
1144 }
1145
1146 rtnl_unlock();
1147
1148 return 0;
1149 }
1150
efx_pci_shutdown(struct pci_dev * pci_dev)1151 static void efx_pci_shutdown(struct pci_dev *pci_dev)
1152 {
1153 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1154
1155 if (!efx)
1156 return;
1157
1158 efx_pm_freeze(&pci_dev->dev);
1159 pci_disable_device(pci_dev);
1160 }
1161
efx_pm_thaw(struct device * dev)1162 static int efx_pm_thaw(struct device *dev)
1163 {
1164 int rc;
1165 struct efx_nic *efx = dev_get_drvdata(dev);
1166
1167 rtnl_lock();
1168
1169 if (efx->state != STATE_DISABLED) {
1170 rc = efx_siena_enable_interrupts(efx);
1171 if (rc)
1172 goto fail;
1173
1174 mutex_lock(&efx->mac_lock);
1175 efx_siena_mcdi_port_reconfigure(efx);
1176 mutex_unlock(&efx->mac_lock);
1177
1178 efx_siena_start_all(efx);
1179
1180 efx_device_attach_if_not_resetting(efx);
1181
1182 efx->state = STATE_READY;
1183
1184 efx->type->resume_wol(efx);
1185 }
1186
1187 rtnl_unlock();
1188
1189 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
1190 efx_siena_queue_reset_work(efx);
1191
1192 return 0;
1193
1194 fail:
1195 rtnl_unlock();
1196
1197 return rc;
1198 }
1199
efx_pm_poweroff(struct device * dev)1200 static int efx_pm_poweroff(struct device *dev)
1201 {
1202 struct pci_dev *pci_dev = to_pci_dev(dev);
1203 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1204
1205 efx->type->fini(efx);
1206
1207 efx->reset_pending = 0;
1208
1209 pci_save_state(pci_dev);
1210 return pci_set_power_state(pci_dev, PCI_D3hot);
1211 }
1212
1213 /* Used for both resume and restore */
efx_pm_resume(struct device * dev)1214 static int efx_pm_resume(struct device *dev)
1215 {
1216 struct pci_dev *pci_dev = to_pci_dev(dev);
1217 struct efx_nic *efx = pci_get_drvdata(pci_dev);
1218 int rc;
1219
1220 rc = pci_set_power_state(pci_dev, PCI_D0);
1221 if (rc)
1222 return rc;
1223 pci_restore_state(pci_dev);
1224 rc = pci_enable_device(pci_dev);
1225 if (rc)
1226 return rc;
1227 pci_set_master(efx->pci_dev);
1228 rc = efx->type->reset(efx, RESET_TYPE_ALL);
1229 if (rc)
1230 return rc;
1231 down_write(&efx->filter_sem);
1232 rc = efx->type->init(efx);
1233 up_write(&efx->filter_sem);
1234 if (rc)
1235 return rc;
1236 rc = efx_pm_thaw(dev);
1237 return rc;
1238 }
1239
efx_pm_suspend(struct device * dev)1240 static int efx_pm_suspend(struct device *dev)
1241 {
1242 int rc;
1243
1244 efx_pm_freeze(dev);
1245 rc = efx_pm_poweroff(dev);
1246 if (rc)
1247 efx_pm_resume(dev);
1248 return rc;
1249 }
1250
1251 static const struct dev_pm_ops efx_pm_ops = {
1252 .suspend = efx_pm_suspend,
1253 .resume = efx_pm_resume,
1254 .freeze = efx_pm_freeze,
1255 .thaw = efx_pm_thaw,
1256 .poweroff = efx_pm_poweroff,
1257 .restore = efx_pm_resume,
1258 };
1259
1260 static struct pci_driver efx_pci_driver = {
1261 .name = KBUILD_MODNAME,
1262 .id_table = efx_pci_table,
1263 .probe = efx_pci_probe,
1264 .remove = efx_pci_remove,
1265 .driver.pm = &efx_pm_ops,
1266 .shutdown = efx_pci_shutdown,
1267 .err_handler = &efx_siena_err_handlers,
1268 #ifdef CONFIG_SFC_SIENA_SRIOV
1269 .sriov_configure = efx_pci_sriov_configure,
1270 #endif
1271 };
1272
1273 /**************************************************************************
1274 *
1275 * Kernel module interface
1276 *
1277 *************************************************************************/
1278
efx_init_module(void)1279 static int __init efx_init_module(void)
1280 {
1281 int rc;
1282
1283 pr_info("Solarflare Siena driver\n");
1284
1285 rc = register_netdevice_notifier(&efx_netdev_notifier);
1286 if (rc)
1287 goto err_notifier;
1288
1289 #ifdef CONFIG_SFC_SIENA_SRIOV
1290 rc = efx_init_sriov();
1291 if (rc)
1292 goto err_sriov;
1293 #endif
1294
1295 rc = efx_siena_create_reset_workqueue();
1296 if (rc)
1297 goto err_reset;
1298
1299 rc = pci_register_driver(&efx_pci_driver);
1300 if (rc < 0)
1301 goto err_pci;
1302
1303 return 0;
1304
1305 err_pci:
1306 efx_siena_destroy_reset_workqueue();
1307 err_reset:
1308 #ifdef CONFIG_SFC_SIENA_SRIOV
1309 efx_fini_sriov();
1310 err_sriov:
1311 #endif
1312 unregister_netdevice_notifier(&efx_netdev_notifier);
1313 err_notifier:
1314 return rc;
1315 }
1316
efx_exit_module(void)1317 static void __exit efx_exit_module(void)
1318 {
1319 pr_info("Solarflare Siena driver unloading\n");
1320
1321 pci_unregister_driver(&efx_pci_driver);
1322 efx_siena_destroy_reset_workqueue();
1323 #ifdef CONFIG_SFC_SIENA_SRIOV
1324 efx_fini_sriov();
1325 #endif
1326 unregister_netdevice_notifier(&efx_netdev_notifier);
1327
1328 }
1329
1330 module_init(efx_init_module);
1331 module_exit(efx_exit_module);
1332
1333 MODULE_AUTHOR("Solarflare Communications and "
1334 "Michael Brown <mbrown@fensystems.co.uk>");
1335 MODULE_DESCRIPTION("Solarflare Siena network driver");
1336 MODULE_LICENSE("GPL");
1337 MODULE_DEVICE_TABLE(pci, efx_pci_table);
1338