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8ceee660 BH |
1 | /**************************************************************************** |
2 | * Driver for Solarflare Solarstorm network controllers and boards | |
3 | * Copyright 2005-2006 Fen Systems Ltd. | |
4 | * Copyright 2005-2008 Solarflare Communications Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License version 2 as published | |
8 | * by the Free Software Foundation, incorporated herein by reference. | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/pci.h> | |
13 | #include <linux/netdevice.h> | |
14 | #include <linux/etherdevice.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/notifier.h> | |
17 | #include <linux/ip.h> | |
18 | #include <linux/tcp.h> | |
19 | #include <linux/in.h> | |
20 | #include <linux/crc32.h> | |
21 | #include <linux/ethtool.h> | |
aa6ef27e | 22 | #include <linux/topology.h> |
8ceee660 | 23 | #include "net_driver.h" |
8ceee660 BH |
24 | #include "ethtool.h" |
25 | #include "tx.h" | |
26 | #include "rx.h" | |
27 | #include "efx.h" | |
28 | #include "mdio_10g.h" | |
29 | #include "falcon.h" | |
8ceee660 BH |
30 | |
31 | #define EFX_MAX_MTU (9 * 1024) | |
32 | ||
33 | /* RX slow fill workqueue. If memory allocation fails in the fast path, | |
34 | * a work item is pushed onto this work queue to retry the allocation later, | |
35 | * to avoid the NIC being starved of RX buffers. Since this is a per cpu | |
36 | * workqueue, there is nothing to be gained in making it per NIC | |
37 | */ | |
38 | static struct workqueue_struct *refill_workqueue; | |
39 | ||
1ab00629 SH |
40 | /* Reset workqueue. If any NIC has a hardware failure then a reset will be |
41 | * queued onto this work queue. This is not a per-nic work queue, because | |
42 | * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. | |
43 | */ | |
44 | static struct workqueue_struct *reset_workqueue; | |
45 | ||
8ceee660 BH |
46 | /************************************************************************** |
47 | * | |
48 | * Configurable values | |
49 | * | |
50 | *************************************************************************/ | |
51 | ||
8ceee660 BH |
52 | /* |
53 | * Use separate channels for TX and RX events | |
54 | * | |
28b581ab NT |
55 | * Set this to 1 to use separate channels for TX and RX. It allows us |
56 | * to control interrupt affinity separately for TX and RX. | |
8ceee660 | 57 | * |
28b581ab | 58 | * This is only used in MSI-X interrupt mode |
8ceee660 | 59 | */ |
28b581ab NT |
60 | static unsigned int separate_tx_channels; |
61 | module_param(separate_tx_channels, uint, 0644); | |
62 | MODULE_PARM_DESC(separate_tx_channels, | |
63 | "Use separate channels for TX and RX"); | |
8ceee660 BH |
64 | |
65 | /* This is the weight assigned to each of the (per-channel) virtual | |
66 | * NAPI devices. | |
67 | */ | |
68 | static int napi_weight = 64; | |
69 | ||
70 | /* This is the time (in jiffies) between invocations of the hardware | |
71 | * monitor, which checks for known hardware bugs and resets the | |
72 | * hardware and driver as necessary. | |
73 | */ | |
74 | unsigned int efx_monitor_interval = 1 * HZ; | |
75 | ||
8ceee660 BH |
76 | /* This controls whether or not the driver will initialise devices |
77 | * with invalid MAC addresses stored in the EEPROM or flash. If true, | |
78 | * such devices will be initialised with a random locally-generated | |
79 | * MAC address. This allows for loading the sfc_mtd driver to | |
80 | * reprogram the flash, even if the flash contents (including the MAC | |
81 | * address) have previously been erased. | |
82 | */ | |
83 | static unsigned int allow_bad_hwaddr; | |
84 | ||
85 | /* Initial interrupt moderation settings. They can be modified after | |
86 | * module load with ethtool. | |
87 | * | |
88 | * The default for RX should strike a balance between increasing the | |
89 | * round-trip latency and reducing overhead. | |
90 | */ | |
91 | static unsigned int rx_irq_mod_usec = 60; | |
92 | ||
93 | /* Initial interrupt moderation settings. They can be modified after | |
94 | * module load with ethtool. | |
95 | * | |
96 | * This default is chosen to ensure that a 10G link does not go idle | |
97 | * while a TX queue is stopped after it has become full. A queue is | |
98 | * restarted when it drops below half full. The time this takes (assuming | |
99 | * worst case 3 descriptors per packet and 1024 descriptors) is | |
100 | * 512 / 3 * 1.2 = 205 usec. | |
101 | */ | |
102 | static unsigned int tx_irq_mod_usec = 150; | |
103 | ||
104 | /* This is the first interrupt mode to try out of: | |
105 | * 0 => MSI-X | |
106 | * 1 => MSI | |
107 | * 2 => legacy | |
108 | */ | |
109 | static unsigned int interrupt_mode; | |
110 | ||
111 | /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), | |
112 | * i.e. the number of CPUs among which we may distribute simultaneous | |
113 | * interrupt handling. | |
114 | * | |
115 | * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. | |
116 | * The default (0) means to assign an interrupt to each package (level II cache) | |
117 | */ | |
118 | static unsigned int rss_cpus; | |
119 | module_param(rss_cpus, uint, 0444); | |
120 | MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); | |
121 | ||
84ae48fe BH |
122 | static int phy_flash_cfg; |
123 | module_param(phy_flash_cfg, int, 0644); | |
124 | MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); | |
125 | ||
6fb70fd1 BH |
126 | static unsigned irq_adapt_low_thresh = 10000; |
127 | module_param(irq_adapt_low_thresh, uint, 0644); | |
128 | MODULE_PARM_DESC(irq_adapt_low_thresh, | |
129 | "Threshold score for reducing IRQ moderation"); | |
130 | ||
131 | static unsigned irq_adapt_high_thresh = 20000; | |
132 | module_param(irq_adapt_high_thresh, uint, 0644); | |
133 | MODULE_PARM_DESC(irq_adapt_high_thresh, | |
134 | "Threshold score for increasing IRQ moderation"); | |
135 | ||
8ceee660 BH |
136 | /************************************************************************** |
137 | * | |
138 | * Utility functions and prototypes | |
139 | * | |
140 | *************************************************************************/ | |
141 | static void efx_remove_channel(struct efx_channel *channel); | |
142 | static void efx_remove_port(struct efx_nic *efx); | |
143 | static void efx_fini_napi(struct efx_nic *efx); | |
144 | static void efx_fini_channels(struct efx_nic *efx); | |
145 | ||
146 | #define EFX_ASSERT_RESET_SERIALISED(efx) \ | |
147 | do { \ | |
3c78708f | 148 | if (efx->state == STATE_RUNNING) \ |
8ceee660 BH |
149 | ASSERT_RTNL(); \ |
150 | } while (0) | |
151 | ||
152 | /************************************************************************** | |
153 | * | |
154 | * Event queue processing | |
155 | * | |
156 | *************************************************************************/ | |
157 | ||
158 | /* Process channel's event queue | |
159 | * | |
160 | * This function is responsible for processing the event queue of a | |
161 | * single channel. The caller must guarantee that this function will | |
162 | * never be concurrently called more than once on the same channel, | |
163 | * though different channels may be being processed concurrently. | |
164 | */ | |
4d566063 | 165 | static int efx_process_channel(struct efx_channel *channel, int rx_quota) |
8ceee660 | 166 | { |
42cbe2d7 BH |
167 | struct efx_nic *efx = channel->efx; |
168 | int rx_packets; | |
8ceee660 | 169 | |
42cbe2d7 | 170 | if (unlikely(efx->reset_pending != RESET_TYPE_NONE || |
8ceee660 | 171 | !channel->enabled)) |
42cbe2d7 | 172 | return 0; |
8ceee660 | 173 | |
42cbe2d7 BH |
174 | rx_packets = falcon_process_eventq(channel, rx_quota); |
175 | if (rx_packets == 0) | |
176 | return 0; | |
8ceee660 BH |
177 | |
178 | /* Deliver last RX packet. */ | |
179 | if (channel->rx_pkt) { | |
180 | __efx_rx_packet(channel, channel->rx_pkt, | |
181 | channel->rx_pkt_csummed); | |
182 | channel->rx_pkt = NULL; | |
183 | } | |
184 | ||
8ceee660 BH |
185 | efx_rx_strategy(channel); |
186 | ||
42cbe2d7 | 187 | efx_fast_push_rx_descriptors(&efx->rx_queue[channel->channel]); |
8ceee660 | 188 | |
42cbe2d7 | 189 | return rx_packets; |
8ceee660 BH |
190 | } |
191 | ||
192 | /* Mark channel as finished processing | |
193 | * | |
194 | * Note that since we will not receive further interrupts for this | |
195 | * channel before we finish processing and call the eventq_read_ack() | |
196 | * method, there is no need to use the interrupt hold-off timers. | |
197 | */ | |
198 | static inline void efx_channel_processed(struct efx_channel *channel) | |
199 | { | |
5b9e207c BH |
200 | /* The interrupt handler for this channel may set work_pending |
201 | * as soon as we acknowledge the events we've seen. Make sure | |
202 | * it's cleared before then. */ | |
dc8cfa55 | 203 | channel->work_pending = false; |
5b9e207c BH |
204 | smp_wmb(); |
205 | ||
8ceee660 BH |
206 | falcon_eventq_read_ack(channel); |
207 | } | |
208 | ||
209 | /* NAPI poll handler | |
210 | * | |
211 | * NAPI guarantees serialisation of polls of the same device, which | |
212 | * provides the guarantee required by efx_process_channel(). | |
213 | */ | |
214 | static int efx_poll(struct napi_struct *napi, int budget) | |
215 | { | |
216 | struct efx_channel *channel = | |
217 | container_of(napi, struct efx_channel, napi_str); | |
8ceee660 BH |
218 | int rx_packets; |
219 | ||
220 | EFX_TRACE(channel->efx, "channel %d NAPI poll executing on CPU %d\n", | |
221 | channel->channel, raw_smp_processor_id()); | |
222 | ||
42cbe2d7 | 223 | rx_packets = efx_process_channel(channel, budget); |
8ceee660 BH |
224 | |
225 | if (rx_packets < budget) { | |
6fb70fd1 BH |
226 | struct efx_nic *efx = channel->efx; |
227 | ||
228 | if (channel->used_flags & EFX_USED_BY_RX && | |
229 | efx->irq_rx_adaptive && | |
230 | unlikely(++channel->irq_count == 1000)) { | |
231 | unsigned old_irq_moderation = channel->irq_moderation; | |
232 | ||
233 | if (unlikely(channel->irq_mod_score < | |
234 | irq_adapt_low_thresh)) { | |
235 | channel->irq_moderation = | |
236 | max_t(int, | |
237 | channel->irq_moderation - | |
238 | FALCON_IRQ_MOD_RESOLUTION, | |
239 | FALCON_IRQ_MOD_RESOLUTION); | |
240 | } else if (unlikely(channel->irq_mod_score > | |
241 | irq_adapt_high_thresh)) { | |
242 | channel->irq_moderation = | |
243 | min(channel->irq_moderation + | |
244 | FALCON_IRQ_MOD_RESOLUTION, | |
245 | efx->irq_rx_moderation); | |
246 | } | |
247 | ||
248 | if (channel->irq_moderation != old_irq_moderation) | |
249 | falcon_set_int_moderation(channel); | |
250 | ||
251 | channel->irq_count = 0; | |
252 | channel->irq_mod_score = 0; | |
253 | } | |
254 | ||
8ceee660 | 255 | /* There is no race here; although napi_disable() will |
288379f0 | 256 | * only wait for napi_complete(), this isn't a problem |
8ceee660 BH |
257 | * since efx_channel_processed() will have no effect if |
258 | * interrupts have already been disabled. | |
259 | */ | |
288379f0 | 260 | napi_complete(napi); |
8ceee660 BH |
261 | efx_channel_processed(channel); |
262 | } | |
263 | ||
264 | return rx_packets; | |
265 | } | |
266 | ||
267 | /* Process the eventq of the specified channel immediately on this CPU | |
268 | * | |
269 | * Disable hardware generated interrupts, wait for any existing | |
270 | * processing to finish, then directly poll (and ack ) the eventq. | |
271 | * Finally reenable NAPI and interrupts. | |
272 | * | |
273 | * Since we are touching interrupts the caller should hold the suspend lock | |
274 | */ | |
275 | void efx_process_channel_now(struct efx_channel *channel) | |
276 | { | |
277 | struct efx_nic *efx = channel->efx; | |
278 | ||
279 | BUG_ON(!channel->used_flags); | |
280 | BUG_ON(!channel->enabled); | |
281 | ||
282 | /* Disable interrupts and wait for ISRs to complete */ | |
283 | falcon_disable_interrupts(efx); | |
284 | if (efx->legacy_irq) | |
285 | synchronize_irq(efx->legacy_irq); | |
64ee3120 | 286 | if (channel->irq) |
8ceee660 BH |
287 | synchronize_irq(channel->irq); |
288 | ||
289 | /* Wait for any NAPI processing to complete */ | |
290 | napi_disable(&channel->napi_str); | |
291 | ||
292 | /* Poll the channel */ | |
3ffeabdd | 293 | efx_process_channel(channel, EFX_EVQ_SIZE); |
8ceee660 BH |
294 | |
295 | /* Ack the eventq. This may cause an interrupt to be generated | |
296 | * when they are reenabled */ | |
297 | efx_channel_processed(channel); | |
298 | ||
299 | napi_enable(&channel->napi_str); | |
300 | falcon_enable_interrupts(efx); | |
301 | } | |
302 | ||
303 | /* Create event queue | |
304 | * Event queue memory allocations are done only once. If the channel | |
305 | * is reset, the memory buffer will be reused; this guards against | |
306 | * errors during channel reset and also simplifies interrupt handling. | |
307 | */ | |
308 | static int efx_probe_eventq(struct efx_channel *channel) | |
309 | { | |
310 | EFX_LOG(channel->efx, "chan %d create event queue\n", channel->channel); | |
311 | ||
312 | return falcon_probe_eventq(channel); | |
313 | } | |
314 | ||
315 | /* Prepare channel's event queue */ | |
bc3c90a2 | 316 | static void efx_init_eventq(struct efx_channel *channel) |
8ceee660 BH |
317 | { |
318 | EFX_LOG(channel->efx, "chan %d init event queue\n", channel->channel); | |
319 | ||
320 | channel->eventq_read_ptr = 0; | |
321 | ||
bc3c90a2 | 322 | falcon_init_eventq(channel); |
8ceee660 BH |
323 | } |
324 | ||
325 | static void efx_fini_eventq(struct efx_channel *channel) | |
326 | { | |
327 | EFX_LOG(channel->efx, "chan %d fini event queue\n", channel->channel); | |
328 | ||
329 | falcon_fini_eventq(channel); | |
330 | } | |
331 | ||
332 | static void efx_remove_eventq(struct efx_channel *channel) | |
333 | { | |
334 | EFX_LOG(channel->efx, "chan %d remove event queue\n", channel->channel); | |
335 | ||
336 | falcon_remove_eventq(channel); | |
337 | } | |
338 | ||
339 | /************************************************************************** | |
340 | * | |
341 | * Channel handling | |
342 | * | |
343 | *************************************************************************/ | |
344 | ||
8ceee660 BH |
345 | static int efx_probe_channel(struct efx_channel *channel) |
346 | { | |
347 | struct efx_tx_queue *tx_queue; | |
348 | struct efx_rx_queue *rx_queue; | |
349 | int rc; | |
350 | ||
351 | EFX_LOG(channel->efx, "creating channel %d\n", channel->channel); | |
352 | ||
353 | rc = efx_probe_eventq(channel); | |
354 | if (rc) | |
355 | goto fail1; | |
356 | ||
357 | efx_for_each_channel_tx_queue(tx_queue, channel) { | |
358 | rc = efx_probe_tx_queue(tx_queue); | |
359 | if (rc) | |
360 | goto fail2; | |
361 | } | |
362 | ||
363 | efx_for_each_channel_rx_queue(rx_queue, channel) { | |
364 | rc = efx_probe_rx_queue(rx_queue); | |
365 | if (rc) | |
366 | goto fail3; | |
367 | } | |
368 | ||
369 | channel->n_rx_frm_trunc = 0; | |
370 | ||
371 | return 0; | |
372 | ||
373 | fail3: | |
374 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
375 | efx_remove_rx_queue(rx_queue); | |
376 | fail2: | |
377 | efx_for_each_channel_tx_queue(tx_queue, channel) | |
378 | efx_remove_tx_queue(tx_queue); | |
379 | fail1: | |
380 | return rc; | |
381 | } | |
382 | ||
383 | ||
56536e9c BH |
384 | static void efx_set_channel_names(struct efx_nic *efx) |
385 | { | |
386 | struct efx_channel *channel; | |
387 | const char *type = ""; | |
388 | int number; | |
389 | ||
390 | efx_for_each_channel(channel, efx) { | |
391 | number = channel->channel; | |
392 | if (efx->n_channels > efx->n_rx_queues) { | |
393 | if (channel->channel < efx->n_rx_queues) { | |
394 | type = "-rx"; | |
395 | } else { | |
396 | type = "-tx"; | |
397 | number -= efx->n_rx_queues; | |
398 | } | |
399 | } | |
400 | snprintf(channel->name, sizeof(channel->name), | |
401 | "%s%s-%d", efx->name, type, number); | |
402 | } | |
403 | } | |
404 | ||
8ceee660 BH |
405 | /* Channels are shutdown and reinitialised whilst the NIC is running |
406 | * to propagate configuration changes (mtu, checksum offload), or | |
407 | * to clear hardware error conditions | |
408 | */ | |
bc3c90a2 | 409 | static void efx_init_channels(struct efx_nic *efx) |
8ceee660 BH |
410 | { |
411 | struct efx_tx_queue *tx_queue; | |
412 | struct efx_rx_queue *rx_queue; | |
413 | struct efx_channel *channel; | |
8ceee660 | 414 | |
f7f13b0b BH |
415 | /* Calculate the rx buffer allocation parameters required to |
416 | * support the current MTU, including padding for header | |
417 | * alignment and overruns. | |
418 | */ | |
419 | efx->rx_buffer_len = (max(EFX_PAGE_IP_ALIGN, NET_IP_ALIGN) + | |
420 | EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + | |
421 | efx->type->rx_buffer_padding); | |
422 | efx->rx_buffer_order = get_order(efx->rx_buffer_len); | |
8ceee660 BH |
423 | |
424 | /* Initialise the channels */ | |
425 | efx_for_each_channel(channel, efx) { | |
426 | EFX_LOG(channel->efx, "init chan %d\n", channel->channel); | |
427 | ||
bc3c90a2 | 428 | efx_init_eventq(channel); |
8ceee660 | 429 | |
bc3c90a2 BH |
430 | efx_for_each_channel_tx_queue(tx_queue, channel) |
431 | efx_init_tx_queue(tx_queue); | |
8ceee660 BH |
432 | |
433 | /* The rx buffer allocation strategy is MTU dependent */ | |
434 | efx_rx_strategy(channel); | |
435 | ||
bc3c90a2 BH |
436 | efx_for_each_channel_rx_queue(rx_queue, channel) |
437 | efx_init_rx_queue(rx_queue); | |
8ceee660 BH |
438 | |
439 | WARN_ON(channel->rx_pkt != NULL); | |
440 | efx_rx_strategy(channel); | |
441 | } | |
8ceee660 BH |
442 | } |
443 | ||
444 | /* This enables event queue processing and packet transmission. | |
445 | * | |
446 | * Note that this function is not allowed to fail, since that would | |
447 | * introduce too much complexity into the suspend/resume path. | |
448 | */ | |
449 | static void efx_start_channel(struct efx_channel *channel) | |
450 | { | |
451 | struct efx_rx_queue *rx_queue; | |
452 | ||
453 | EFX_LOG(channel->efx, "starting chan %d\n", channel->channel); | |
454 | ||
5b9e207c BH |
455 | /* The interrupt handler for this channel may set work_pending |
456 | * as soon as we enable it. Make sure it's cleared before | |
457 | * then. Similarly, make sure it sees the enabled flag set. */ | |
dc8cfa55 BH |
458 | channel->work_pending = false; |
459 | channel->enabled = true; | |
5b9e207c | 460 | smp_wmb(); |
8ceee660 BH |
461 | |
462 | napi_enable(&channel->napi_str); | |
463 | ||
464 | /* Load up RX descriptors */ | |
465 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
466 | efx_fast_push_rx_descriptors(rx_queue); | |
467 | } | |
468 | ||
469 | /* This disables event queue processing and packet transmission. | |
470 | * This function does not guarantee that all queue processing | |
471 | * (e.g. RX refill) is complete. | |
472 | */ | |
473 | static void efx_stop_channel(struct efx_channel *channel) | |
474 | { | |
475 | struct efx_rx_queue *rx_queue; | |
476 | ||
477 | if (!channel->enabled) | |
478 | return; | |
479 | ||
480 | EFX_LOG(channel->efx, "stop chan %d\n", channel->channel); | |
481 | ||
dc8cfa55 | 482 | channel->enabled = false; |
8ceee660 BH |
483 | napi_disable(&channel->napi_str); |
484 | ||
485 | /* Ensure that any worker threads have exited or will be no-ops */ | |
486 | efx_for_each_channel_rx_queue(rx_queue, channel) { | |
487 | spin_lock_bh(&rx_queue->add_lock); | |
488 | spin_unlock_bh(&rx_queue->add_lock); | |
489 | } | |
490 | } | |
491 | ||
492 | static void efx_fini_channels(struct efx_nic *efx) | |
493 | { | |
494 | struct efx_channel *channel; | |
495 | struct efx_tx_queue *tx_queue; | |
496 | struct efx_rx_queue *rx_queue; | |
6bc5d3a9 | 497 | int rc; |
8ceee660 BH |
498 | |
499 | EFX_ASSERT_RESET_SERIALISED(efx); | |
500 | BUG_ON(efx->port_enabled); | |
501 | ||
6bc5d3a9 BH |
502 | rc = falcon_flush_queues(efx); |
503 | if (rc) | |
504 | EFX_ERR(efx, "failed to flush queues\n"); | |
505 | else | |
506 | EFX_LOG(efx, "successfully flushed all queues\n"); | |
507 | ||
8ceee660 BH |
508 | efx_for_each_channel(channel, efx) { |
509 | EFX_LOG(channel->efx, "shut down chan %d\n", channel->channel); | |
510 | ||
511 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
512 | efx_fini_rx_queue(rx_queue); | |
513 | efx_for_each_channel_tx_queue(tx_queue, channel) | |
514 | efx_fini_tx_queue(tx_queue); | |
8ceee660 BH |
515 | efx_fini_eventq(channel); |
516 | } | |
517 | } | |
518 | ||
519 | static void efx_remove_channel(struct efx_channel *channel) | |
520 | { | |
521 | struct efx_tx_queue *tx_queue; | |
522 | struct efx_rx_queue *rx_queue; | |
523 | ||
524 | EFX_LOG(channel->efx, "destroy chan %d\n", channel->channel); | |
525 | ||
526 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
527 | efx_remove_rx_queue(rx_queue); | |
528 | efx_for_each_channel_tx_queue(tx_queue, channel) | |
529 | efx_remove_tx_queue(tx_queue); | |
530 | efx_remove_eventq(channel); | |
531 | ||
532 | channel->used_flags = 0; | |
533 | } | |
534 | ||
535 | void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue, int delay) | |
536 | { | |
537 | queue_delayed_work(refill_workqueue, &rx_queue->work, delay); | |
538 | } | |
539 | ||
540 | /************************************************************************** | |
541 | * | |
542 | * Port handling | |
543 | * | |
544 | **************************************************************************/ | |
545 | ||
546 | /* This ensures that the kernel is kept informed (via | |
547 | * netif_carrier_on/off) of the link status, and also maintains the | |
548 | * link status's stop on the port's TX queue. | |
549 | */ | |
550 | static void efx_link_status_changed(struct efx_nic *efx) | |
551 | { | |
8ceee660 BH |
552 | /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure |
553 | * that no events are triggered between unregister_netdev() and the | |
554 | * driver unloading. A more general condition is that NETDEV_CHANGE | |
555 | * can only be generated between NETDEV_UP and NETDEV_DOWN */ | |
556 | if (!netif_running(efx->net_dev)) | |
557 | return; | |
558 | ||
8c8661e4 BH |
559 | if (efx->port_inhibited) { |
560 | netif_carrier_off(efx->net_dev); | |
561 | return; | |
562 | } | |
563 | ||
dc8cfa55 | 564 | if (efx->link_up != netif_carrier_ok(efx->net_dev)) { |
8ceee660 BH |
565 | efx->n_link_state_changes++; |
566 | ||
567 | if (efx->link_up) | |
568 | netif_carrier_on(efx->net_dev); | |
569 | else | |
570 | netif_carrier_off(efx->net_dev); | |
571 | } | |
572 | ||
573 | /* Status message for kernel log */ | |
574 | if (efx->link_up) { | |
f31a45d2 BH |
575 | EFX_INFO(efx, "link up at %uMbps %s-duplex (MTU %d)%s\n", |
576 | efx->link_speed, efx->link_fd ? "full" : "half", | |
8ceee660 BH |
577 | efx->net_dev->mtu, |
578 | (efx->promiscuous ? " [PROMISC]" : "")); | |
579 | } else { | |
580 | EFX_INFO(efx, "link down\n"); | |
581 | } | |
582 | ||
583 | } | |
584 | ||
115122af BH |
585 | static void efx_fini_port(struct efx_nic *efx); |
586 | ||
8ceee660 BH |
587 | /* This call reinitialises the MAC to pick up new PHY settings. The |
588 | * caller must hold the mac_lock */ | |
8c8661e4 | 589 | void __efx_reconfigure_port(struct efx_nic *efx) |
8ceee660 BH |
590 | { |
591 | WARN_ON(!mutex_is_locked(&efx->mac_lock)); | |
592 | ||
593 | EFX_LOG(efx, "reconfiguring MAC from PHY settings on CPU %d\n", | |
594 | raw_smp_processor_id()); | |
595 | ||
a816f75a BH |
596 | /* Serialise the promiscuous flag with efx_set_multicast_list. */ |
597 | if (efx_dev_registered(efx)) { | |
598 | netif_addr_lock_bh(efx->net_dev); | |
599 | netif_addr_unlock_bh(efx->net_dev); | |
600 | } | |
601 | ||
177dfcd8 BH |
602 | falcon_deconfigure_mac_wrapper(efx); |
603 | ||
604 | /* Reconfigure the PHY, disabling transmit in mac level loopback. */ | |
605 | if (LOOPBACK_INTERNAL(efx)) | |
606 | efx->phy_mode |= PHY_MODE_TX_DISABLED; | |
607 | else | |
608 | efx->phy_mode &= ~PHY_MODE_TX_DISABLED; | |
609 | efx->phy_op->reconfigure(efx); | |
610 | ||
611 | if (falcon_switch_mac(efx)) | |
612 | goto fail; | |
613 | ||
614 | efx->mac_op->reconfigure(efx); | |
8ceee660 BH |
615 | |
616 | /* Inform kernel of loss/gain of carrier */ | |
617 | efx_link_status_changed(efx); | |
177dfcd8 BH |
618 | return; |
619 | ||
620 | fail: | |
621 | EFX_ERR(efx, "failed to reconfigure MAC\n"); | |
115122af BH |
622 | efx->port_enabled = false; |
623 | efx_fini_port(efx); | |
8ceee660 BH |
624 | } |
625 | ||
626 | /* Reinitialise the MAC to pick up new PHY settings, even if the port is | |
627 | * disabled. */ | |
628 | void efx_reconfigure_port(struct efx_nic *efx) | |
629 | { | |
630 | EFX_ASSERT_RESET_SERIALISED(efx); | |
631 | ||
632 | mutex_lock(&efx->mac_lock); | |
633 | __efx_reconfigure_port(efx); | |
634 | mutex_unlock(&efx->mac_lock); | |
635 | } | |
636 | ||
637 | /* Asynchronous efx_reconfigure_port work item. To speed up efx_flush_all() | |
638 | * we don't efx_reconfigure_port() if the port is disabled. Care is taken | |
639 | * in efx_stop_all() and efx_start_port() to prevent PHY events being lost */ | |
766ca0fa | 640 | static void efx_phy_work(struct work_struct *data) |
8ceee660 | 641 | { |
766ca0fa | 642 | struct efx_nic *efx = container_of(data, struct efx_nic, phy_work); |
8ceee660 BH |
643 | |
644 | mutex_lock(&efx->mac_lock); | |
645 | if (efx->port_enabled) | |
646 | __efx_reconfigure_port(efx); | |
647 | mutex_unlock(&efx->mac_lock); | |
648 | } | |
649 | ||
766ca0fa BH |
650 | static void efx_mac_work(struct work_struct *data) |
651 | { | |
652 | struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); | |
653 | ||
654 | mutex_lock(&efx->mac_lock); | |
655 | if (efx->port_enabled) | |
656 | efx->mac_op->irq(efx); | |
657 | mutex_unlock(&efx->mac_lock); | |
658 | } | |
659 | ||
8ceee660 BH |
660 | static int efx_probe_port(struct efx_nic *efx) |
661 | { | |
662 | int rc; | |
663 | ||
664 | EFX_LOG(efx, "create port\n"); | |
665 | ||
666 | /* Connect up MAC/PHY operations table and read MAC address */ | |
667 | rc = falcon_probe_port(efx); | |
668 | if (rc) | |
669 | goto err; | |
670 | ||
84ae48fe BH |
671 | if (phy_flash_cfg) |
672 | efx->phy_mode = PHY_MODE_SPECIAL; | |
673 | ||
8ceee660 BH |
674 | /* Sanity check MAC address */ |
675 | if (is_valid_ether_addr(efx->mac_address)) { | |
676 | memcpy(efx->net_dev->dev_addr, efx->mac_address, ETH_ALEN); | |
677 | } else { | |
e174961c JB |
678 | EFX_ERR(efx, "invalid MAC address %pM\n", |
679 | efx->mac_address); | |
8ceee660 BH |
680 | if (!allow_bad_hwaddr) { |
681 | rc = -EINVAL; | |
682 | goto err; | |
683 | } | |
684 | random_ether_addr(efx->net_dev->dev_addr); | |
e174961c JB |
685 | EFX_INFO(efx, "using locally-generated MAC %pM\n", |
686 | efx->net_dev->dev_addr); | |
8ceee660 BH |
687 | } |
688 | ||
689 | return 0; | |
690 | ||
691 | err: | |
692 | efx_remove_port(efx); | |
693 | return rc; | |
694 | } | |
695 | ||
696 | static int efx_init_port(struct efx_nic *efx) | |
697 | { | |
698 | int rc; | |
699 | ||
700 | EFX_LOG(efx, "init port\n"); | |
701 | ||
177dfcd8 | 702 | rc = efx->phy_op->init(efx); |
8ceee660 BH |
703 | if (rc) |
704 | return rc; | |
177dfcd8 | 705 | mutex_lock(&efx->mac_lock); |
4b988280 | 706 | efx->phy_op->reconfigure(efx); |
177dfcd8 BH |
707 | rc = falcon_switch_mac(efx); |
708 | mutex_unlock(&efx->mac_lock); | |
709 | if (rc) | |
710 | goto fail; | |
711 | efx->mac_op->reconfigure(efx); | |
8ceee660 | 712 | |
dc8cfa55 | 713 | efx->port_initialized = true; |
1974cc20 | 714 | efx_stats_enable(efx); |
8ceee660 | 715 | return 0; |
177dfcd8 BH |
716 | |
717 | fail: | |
718 | efx->phy_op->fini(efx); | |
719 | return rc; | |
8ceee660 BH |
720 | } |
721 | ||
722 | /* Allow efx_reconfigure_port() to be scheduled, and close the window | |
723 | * between efx_stop_port and efx_flush_all whereby a previously scheduled | |
766ca0fa | 724 | * efx_phy_work()/efx_mac_work() may have been cancelled */ |
8ceee660 BH |
725 | static void efx_start_port(struct efx_nic *efx) |
726 | { | |
727 | EFX_LOG(efx, "start port\n"); | |
728 | BUG_ON(efx->port_enabled); | |
729 | ||
730 | mutex_lock(&efx->mac_lock); | |
dc8cfa55 | 731 | efx->port_enabled = true; |
8ceee660 | 732 | __efx_reconfigure_port(efx); |
766ca0fa | 733 | efx->mac_op->irq(efx); |
8ceee660 BH |
734 | mutex_unlock(&efx->mac_lock); |
735 | } | |
736 | ||
766ca0fa BH |
737 | /* Prevent efx_phy_work, efx_mac_work, and efx_monitor() from executing, |
738 | * and efx_set_multicast_list() from scheduling efx_phy_work. efx_phy_work | |
739 | * and efx_mac_work may still be scheduled via NAPI processing until | |
740 | * efx_flush_all() is called */ | |
8ceee660 BH |
741 | static void efx_stop_port(struct efx_nic *efx) |
742 | { | |
743 | EFX_LOG(efx, "stop port\n"); | |
744 | ||
745 | mutex_lock(&efx->mac_lock); | |
dc8cfa55 | 746 | efx->port_enabled = false; |
8ceee660 BH |
747 | mutex_unlock(&efx->mac_lock); |
748 | ||
749 | /* Serialise against efx_set_multicast_list() */ | |
55668611 | 750 | if (efx_dev_registered(efx)) { |
b9e40857 DM |
751 | netif_addr_lock_bh(efx->net_dev); |
752 | netif_addr_unlock_bh(efx->net_dev); | |
8ceee660 BH |
753 | } |
754 | } | |
755 | ||
756 | static void efx_fini_port(struct efx_nic *efx) | |
757 | { | |
758 | EFX_LOG(efx, "shut down port\n"); | |
759 | ||
760 | if (!efx->port_initialized) | |
761 | return; | |
762 | ||
1974cc20 | 763 | efx_stats_disable(efx); |
177dfcd8 | 764 | efx->phy_op->fini(efx); |
dc8cfa55 | 765 | efx->port_initialized = false; |
8ceee660 | 766 | |
dc8cfa55 | 767 | efx->link_up = false; |
8ceee660 BH |
768 | efx_link_status_changed(efx); |
769 | } | |
770 | ||
771 | static void efx_remove_port(struct efx_nic *efx) | |
772 | { | |
773 | EFX_LOG(efx, "destroying port\n"); | |
774 | ||
775 | falcon_remove_port(efx); | |
776 | } | |
777 | ||
778 | /************************************************************************** | |
779 | * | |
780 | * NIC handling | |
781 | * | |
782 | **************************************************************************/ | |
783 | ||
784 | /* This configures the PCI device to enable I/O and DMA. */ | |
785 | static int efx_init_io(struct efx_nic *efx) | |
786 | { | |
787 | struct pci_dev *pci_dev = efx->pci_dev; | |
788 | dma_addr_t dma_mask = efx->type->max_dma_mask; | |
789 | int rc; | |
790 | ||
791 | EFX_LOG(efx, "initialising I/O\n"); | |
792 | ||
793 | rc = pci_enable_device(pci_dev); | |
794 | if (rc) { | |
795 | EFX_ERR(efx, "failed to enable PCI device\n"); | |
796 | goto fail1; | |
797 | } | |
798 | ||
799 | pci_set_master(pci_dev); | |
800 | ||
801 | /* Set the PCI DMA mask. Try all possibilities from our | |
802 | * genuine mask down to 32 bits, because some architectures | |
803 | * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit | |
804 | * masks event though they reject 46 bit masks. | |
805 | */ | |
806 | while (dma_mask > 0x7fffffffUL) { | |
807 | if (pci_dma_supported(pci_dev, dma_mask) && | |
808 | ((rc = pci_set_dma_mask(pci_dev, dma_mask)) == 0)) | |
809 | break; | |
810 | dma_mask >>= 1; | |
811 | } | |
812 | if (rc) { | |
813 | EFX_ERR(efx, "could not find a suitable DMA mask\n"); | |
814 | goto fail2; | |
815 | } | |
816 | EFX_LOG(efx, "using DMA mask %llx\n", (unsigned long long) dma_mask); | |
817 | rc = pci_set_consistent_dma_mask(pci_dev, dma_mask); | |
818 | if (rc) { | |
819 | /* pci_set_consistent_dma_mask() is not *allowed* to | |
820 | * fail with a mask that pci_set_dma_mask() accepted, | |
821 | * but just in case... | |
822 | */ | |
823 | EFX_ERR(efx, "failed to set consistent DMA mask\n"); | |
824 | goto fail2; | |
825 | } | |
826 | ||
827 | efx->membase_phys = pci_resource_start(efx->pci_dev, | |
828 | efx->type->mem_bar); | |
829 | rc = pci_request_region(pci_dev, efx->type->mem_bar, "sfc"); | |
830 | if (rc) { | |
831 | EFX_ERR(efx, "request for memory BAR failed\n"); | |
832 | rc = -EIO; | |
833 | goto fail3; | |
834 | } | |
835 | efx->membase = ioremap_nocache(efx->membase_phys, | |
836 | efx->type->mem_map_size); | |
837 | if (!efx->membase) { | |
086ea356 BH |
838 | EFX_ERR(efx, "could not map memory BAR %d at %llx+%x\n", |
839 | efx->type->mem_bar, | |
840 | (unsigned long long)efx->membase_phys, | |
8ceee660 BH |
841 | efx->type->mem_map_size); |
842 | rc = -ENOMEM; | |
843 | goto fail4; | |
844 | } | |
086ea356 BH |
845 | EFX_LOG(efx, "memory BAR %u at %llx+%x (virtual %p)\n", |
846 | efx->type->mem_bar, (unsigned long long)efx->membase_phys, | |
847 | efx->type->mem_map_size, efx->membase); | |
8ceee660 BH |
848 | |
849 | return 0; | |
850 | ||
851 | fail4: | |
e1074a0d | 852 | pci_release_region(efx->pci_dev, efx->type->mem_bar); |
8ceee660 | 853 | fail3: |
2c118e0f | 854 | efx->membase_phys = 0; |
8ceee660 BH |
855 | fail2: |
856 | pci_disable_device(efx->pci_dev); | |
857 | fail1: | |
858 | return rc; | |
859 | } | |
860 | ||
861 | static void efx_fini_io(struct efx_nic *efx) | |
862 | { | |
863 | EFX_LOG(efx, "shutting down I/O\n"); | |
864 | ||
865 | if (efx->membase) { | |
866 | iounmap(efx->membase); | |
867 | efx->membase = NULL; | |
868 | } | |
869 | ||
870 | if (efx->membase_phys) { | |
871 | pci_release_region(efx->pci_dev, efx->type->mem_bar); | |
2c118e0f | 872 | efx->membase_phys = 0; |
8ceee660 BH |
873 | } |
874 | ||
875 | pci_disable_device(efx->pci_dev); | |
876 | } | |
877 | ||
46123d04 BH |
878 | /* Get number of RX queues wanted. Return number of online CPU |
879 | * packages in the expectation that an IRQ balancer will spread | |
880 | * interrupts across them. */ | |
881 | static int efx_wanted_rx_queues(void) | |
882 | { | |
2f8975fb | 883 | cpumask_var_t core_mask; |
46123d04 BH |
884 | int count; |
885 | int cpu; | |
886 | ||
79f55997 | 887 | if (unlikely(!zalloc_cpumask_var(&core_mask, GFP_KERNEL))) { |
2f8975fb | 888 | printk(KERN_WARNING |
3977d033 | 889 | "sfc: RSS disabled due to allocation failure\n"); |
2f8975fb RR |
890 | return 1; |
891 | } | |
892 | ||
46123d04 BH |
893 | count = 0; |
894 | for_each_online_cpu(cpu) { | |
2f8975fb | 895 | if (!cpumask_test_cpu(cpu, core_mask)) { |
46123d04 | 896 | ++count; |
2f8975fb | 897 | cpumask_or(core_mask, core_mask, |
fbd59a8d | 898 | topology_core_cpumask(cpu)); |
46123d04 BH |
899 | } |
900 | } | |
901 | ||
2f8975fb | 902 | free_cpumask_var(core_mask); |
46123d04 BH |
903 | return count; |
904 | } | |
905 | ||
906 | /* Probe the number and type of interrupts we are able to obtain, and | |
907 | * the resulting numbers of channels and RX queues. | |
908 | */ | |
8ceee660 BH |
909 | static void efx_probe_interrupts(struct efx_nic *efx) |
910 | { | |
46123d04 BH |
911 | int max_channels = |
912 | min_t(int, efx->type->phys_addr_channels, EFX_MAX_CHANNELS); | |
8ceee660 BH |
913 | int rc, i; |
914 | ||
915 | if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { | |
46123d04 BH |
916 | struct msix_entry xentries[EFX_MAX_CHANNELS]; |
917 | int wanted_ints; | |
28b581ab | 918 | int rx_queues; |
aa6ef27e | 919 | |
46123d04 BH |
920 | /* We want one RX queue and interrupt per CPU package |
921 | * (or as specified by the rss_cpus module parameter). | |
922 | * We will need one channel per interrupt. | |
923 | */ | |
28b581ab NT |
924 | rx_queues = rss_cpus ? rss_cpus : efx_wanted_rx_queues(); |
925 | wanted_ints = rx_queues + (separate_tx_channels ? 1 : 0); | |
926 | wanted_ints = min(wanted_ints, max_channels); | |
8ceee660 | 927 | |
28b581ab | 928 | for (i = 0; i < wanted_ints; i++) |
8ceee660 | 929 | xentries[i].entry = i; |
28b581ab | 930 | rc = pci_enable_msix(efx->pci_dev, xentries, wanted_ints); |
8ceee660 | 931 | if (rc > 0) { |
28b581ab NT |
932 | EFX_ERR(efx, "WARNING: Insufficient MSI-X vectors" |
933 | " available (%d < %d).\n", rc, wanted_ints); | |
934 | EFX_ERR(efx, "WARNING: Performance may be reduced.\n"); | |
935 | EFX_BUG_ON_PARANOID(rc >= wanted_ints); | |
936 | wanted_ints = rc; | |
8ceee660 | 937 | rc = pci_enable_msix(efx->pci_dev, xentries, |
28b581ab | 938 | wanted_ints); |
8ceee660 BH |
939 | } |
940 | ||
941 | if (rc == 0) { | |
28b581ab NT |
942 | efx->n_rx_queues = min(rx_queues, wanted_ints); |
943 | efx->n_channels = wanted_ints; | |
944 | for (i = 0; i < wanted_ints; i++) | |
8ceee660 | 945 | efx->channel[i].irq = xentries[i].vector; |
8ceee660 BH |
946 | } else { |
947 | /* Fall back to single channel MSI */ | |
948 | efx->interrupt_mode = EFX_INT_MODE_MSI; | |
949 | EFX_ERR(efx, "could not enable MSI-X\n"); | |
950 | } | |
951 | } | |
952 | ||
953 | /* Try single interrupt MSI */ | |
954 | if (efx->interrupt_mode == EFX_INT_MODE_MSI) { | |
8831da7b | 955 | efx->n_rx_queues = 1; |
28b581ab | 956 | efx->n_channels = 1; |
8ceee660 BH |
957 | rc = pci_enable_msi(efx->pci_dev); |
958 | if (rc == 0) { | |
959 | efx->channel[0].irq = efx->pci_dev->irq; | |
8ceee660 BH |
960 | } else { |
961 | EFX_ERR(efx, "could not enable MSI\n"); | |
962 | efx->interrupt_mode = EFX_INT_MODE_LEGACY; | |
963 | } | |
964 | } | |
965 | ||
966 | /* Assume legacy interrupts */ | |
967 | if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { | |
8831da7b | 968 | efx->n_rx_queues = 1; |
28b581ab | 969 | efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); |
8ceee660 BH |
970 | efx->legacy_irq = efx->pci_dev->irq; |
971 | } | |
972 | } | |
973 | ||
974 | static void efx_remove_interrupts(struct efx_nic *efx) | |
975 | { | |
976 | struct efx_channel *channel; | |
977 | ||
978 | /* Remove MSI/MSI-X interrupts */ | |
64ee3120 | 979 | efx_for_each_channel(channel, efx) |
8ceee660 BH |
980 | channel->irq = 0; |
981 | pci_disable_msi(efx->pci_dev); | |
982 | pci_disable_msix(efx->pci_dev); | |
983 | ||
984 | /* Remove legacy interrupt */ | |
985 | efx->legacy_irq = 0; | |
986 | } | |
987 | ||
8831da7b | 988 | static void efx_set_channels(struct efx_nic *efx) |
8ceee660 BH |
989 | { |
990 | struct efx_tx_queue *tx_queue; | |
991 | struct efx_rx_queue *rx_queue; | |
8ceee660 | 992 | |
60ac1065 | 993 | efx_for_each_tx_queue(tx_queue, efx) { |
28b581ab NT |
994 | if (separate_tx_channels) |
995 | tx_queue->channel = &efx->channel[efx->n_channels-1]; | |
60ac1065 BH |
996 | else |
997 | tx_queue->channel = &efx->channel[0]; | |
998 | tx_queue->channel->used_flags |= EFX_USED_BY_TX; | |
999 | } | |
8ceee660 | 1000 | |
8831da7b BH |
1001 | efx_for_each_rx_queue(rx_queue, efx) { |
1002 | rx_queue->channel = &efx->channel[rx_queue->queue]; | |
1003 | rx_queue->channel->used_flags |= EFX_USED_BY_RX; | |
8ceee660 BH |
1004 | } |
1005 | } | |
1006 | ||
1007 | static int efx_probe_nic(struct efx_nic *efx) | |
1008 | { | |
1009 | int rc; | |
1010 | ||
1011 | EFX_LOG(efx, "creating NIC\n"); | |
1012 | ||
1013 | /* Carry out hardware-type specific initialisation */ | |
1014 | rc = falcon_probe_nic(efx); | |
1015 | if (rc) | |
1016 | return rc; | |
1017 | ||
1018 | /* Determine the number of channels and RX queues by trying to hook | |
1019 | * in MSI-X interrupts. */ | |
1020 | efx_probe_interrupts(efx); | |
1021 | ||
8831da7b | 1022 | efx_set_channels(efx); |
8ceee660 BH |
1023 | |
1024 | /* Initialise the interrupt moderation settings */ | |
6fb70fd1 | 1025 | efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true); |
8ceee660 BH |
1026 | |
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | static void efx_remove_nic(struct efx_nic *efx) | |
1031 | { | |
1032 | EFX_LOG(efx, "destroying NIC\n"); | |
1033 | ||
1034 | efx_remove_interrupts(efx); | |
1035 | falcon_remove_nic(efx); | |
1036 | } | |
1037 | ||
1038 | /************************************************************************** | |
1039 | * | |
1040 | * NIC startup/shutdown | |
1041 | * | |
1042 | *************************************************************************/ | |
1043 | ||
1044 | static int efx_probe_all(struct efx_nic *efx) | |
1045 | { | |
1046 | struct efx_channel *channel; | |
1047 | int rc; | |
1048 | ||
1049 | /* Create NIC */ | |
1050 | rc = efx_probe_nic(efx); | |
1051 | if (rc) { | |
1052 | EFX_ERR(efx, "failed to create NIC\n"); | |
1053 | goto fail1; | |
1054 | } | |
1055 | ||
1056 | /* Create port */ | |
1057 | rc = efx_probe_port(efx); | |
1058 | if (rc) { | |
1059 | EFX_ERR(efx, "failed to create port\n"); | |
1060 | goto fail2; | |
1061 | } | |
1062 | ||
1063 | /* Create channels */ | |
1064 | efx_for_each_channel(channel, efx) { | |
1065 | rc = efx_probe_channel(channel); | |
1066 | if (rc) { | |
1067 | EFX_ERR(efx, "failed to create channel %d\n", | |
1068 | channel->channel); | |
1069 | goto fail3; | |
1070 | } | |
1071 | } | |
56536e9c | 1072 | efx_set_channel_names(efx); |
8ceee660 BH |
1073 | |
1074 | return 0; | |
1075 | ||
1076 | fail3: | |
1077 | efx_for_each_channel(channel, efx) | |
1078 | efx_remove_channel(channel); | |
1079 | efx_remove_port(efx); | |
1080 | fail2: | |
1081 | efx_remove_nic(efx); | |
1082 | fail1: | |
1083 | return rc; | |
1084 | } | |
1085 | ||
1086 | /* Called after previous invocation(s) of efx_stop_all, restarts the | |
1087 | * port, kernel transmit queue, NAPI processing and hardware interrupts, | |
1088 | * and ensures that the port is scheduled to be reconfigured. | |
1089 | * This function is safe to call multiple times when the NIC is in any | |
1090 | * state. */ | |
1091 | static void efx_start_all(struct efx_nic *efx) | |
1092 | { | |
1093 | struct efx_channel *channel; | |
1094 | ||
1095 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1096 | ||
1097 | /* Check that it is appropriate to restart the interface. All | |
1098 | * of these flags are safe to read under just the rtnl lock */ | |
1099 | if (efx->port_enabled) | |
1100 | return; | |
1101 | if ((efx->state != STATE_RUNNING) && (efx->state != STATE_INIT)) | |
1102 | return; | |
55668611 | 1103 | if (efx_dev_registered(efx) && !netif_running(efx->net_dev)) |
8ceee660 BH |
1104 | return; |
1105 | ||
1106 | /* Mark the port as enabled so port reconfigurations can start, then | |
1107 | * restart the transmit interface early so the watchdog timer stops */ | |
1108 | efx_start_port(efx); | |
dacccc74 SH |
1109 | if (efx_dev_registered(efx)) |
1110 | efx_wake_queue(efx); | |
8ceee660 BH |
1111 | |
1112 | efx_for_each_channel(channel, efx) | |
1113 | efx_start_channel(channel); | |
1114 | ||
1115 | falcon_enable_interrupts(efx); | |
1116 | ||
1117 | /* Start hardware monitor if we're in RUNNING */ | |
1118 | if (efx->state == STATE_RUNNING) | |
1119 | queue_delayed_work(efx->workqueue, &efx->monitor_work, | |
1120 | efx_monitor_interval); | |
1121 | } | |
1122 | ||
1123 | /* Flush all delayed work. Should only be called when no more delayed work | |
1124 | * will be scheduled. This doesn't flush pending online resets (efx_reset), | |
1125 | * since we're holding the rtnl_lock at this point. */ | |
1126 | static void efx_flush_all(struct efx_nic *efx) | |
1127 | { | |
1128 | struct efx_rx_queue *rx_queue; | |
1129 | ||
1130 | /* Make sure the hardware monitor is stopped */ | |
1131 | cancel_delayed_work_sync(&efx->monitor_work); | |
1132 | ||
1133 | /* Ensure that all RX slow refills are complete. */ | |
b3475645 | 1134 | efx_for_each_rx_queue(rx_queue, efx) |
8ceee660 | 1135 | cancel_delayed_work_sync(&rx_queue->work); |
8ceee660 BH |
1136 | |
1137 | /* Stop scheduled port reconfigurations */ | |
766ca0fa BH |
1138 | cancel_work_sync(&efx->mac_work); |
1139 | cancel_work_sync(&efx->phy_work); | |
8ceee660 BH |
1140 | |
1141 | } | |
1142 | ||
1143 | /* Quiesce hardware and software without bringing the link down. | |
1144 | * Safe to call multiple times, when the nic and interface is in any | |
1145 | * state. The caller is guaranteed to subsequently be in a position | |
1146 | * to modify any hardware and software state they see fit without | |
1147 | * taking locks. */ | |
1148 | static void efx_stop_all(struct efx_nic *efx) | |
1149 | { | |
1150 | struct efx_channel *channel; | |
1151 | ||
1152 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1153 | ||
1154 | /* port_enabled can be read safely under the rtnl lock */ | |
1155 | if (!efx->port_enabled) | |
1156 | return; | |
1157 | ||
1158 | /* Disable interrupts and wait for ISR to complete */ | |
1159 | falcon_disable_interrupts(efx); | |
1160 | if (efx->legacy_irq) | |
1161 | synchronize_irq(efx->legacy_irq); | |
64ee3120 | 1162 | efx_for_each_channel(channel, efx) { |
8ceee660 BH |
1163 | if (channel->irq) |
1164 | synchronize_irq(channel->irq); | |
b3475645 | 1165 | } |
8ceee660 BH |
1166 | |
1167 | /* Stop all NAPI processing and synchronous rx refills */ | |
1168 | efx_for_each_channel(channel, efx) | |
1169 | efx_stop_channel(channel); | |
1170 | ||
1171 | /* Stop all asynchronous port reconfigurations. Since all | |
1172 | * event processing has already been stopped, there is no | |
1173 | * window to loose phy events */ | |
1174 | efx_stop_port(efx); | |
1175 | ||
766ca0fa | 1176 | /* Flush efx_phy_work, efx_mac_work, refill_workqueue, monitor_work */ |
8ceee660 BH |
1177 | efx_flush_all(efx); |
1178 | ||
1179 | /* Isolate the MAC from the TX and RX engines, so that queue | |
1180 | * flushes will complete in a timely fashion. */ | |
5c8af3b9 BH |
1181 | falcon_deconfigure_mac_wrapper(efx); |
1182 | msleep(10); /* Let the Rx FIFO drain */ | |
8ceee660 BH |
1183 | falcon_drain_tx_fifo(efx); |
1184 | ||
1185 | /* Stop the kernel transmit interface late, so the watchdog | |
1186 | * timer isn't ticking over the flush */ | |
55668611 | 1187 | if (efx_dev_registered(efx)) { |
dacccc74 | 1188 | efx_stop_queue(efx); |
8ceee660 BH |
1189 | netif_tx_lock_bh(efx->net_dev); |
1190 | netif_tx_unlock_bh(efx->net_dev); | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | static void efx_remove_all(struct efx_nic *efx) | |
1195 | { | |
1196 | struct efx_channel *channel; | |
1197 | ||
1198 | efx_for_each_channel(channel, efx) | |
1199 | efx_remove_channel(channel); | |
1200 | efx_remove_port(efx); | |
1201 | efx_remove_nic(efx); | |
1202 | } | |
1203 | ||
1204 | /* A convinience function to safely flush all the queues */ | |
bc3c90a2 | 1205 | void efx_flush_queues(struct efx_nic *efx) |
8ceee660 | 1206 | { |
8ceee660 BH |
1207 | EFX_ASSERT_RESET_SERIALISED(efx); |
1208 | ||
1209 | efx_stop_all(efx); | |
1210 | ||
1211 | efx_fini_channels(efx); | |
bc3c90a2 | 1212 | efx_init_channels(efx); |
8ceee660 BH |
1213 | |
1214 | efx_start_all(efx); | |
8ceee660 BH |
1215 | } |
1216 | ||
1217 | /************************************************************************** | |
1218 | * | |
1219 | * Interrupt moderation | |
1220 | * | |
1221 | **************************************************************************/ | |
1222 | ||
1223 | /* Set interrupt moderation parameters */ | |
6fb70fd1 BH |
1224 | void efx_init_irq_moderation(struct efx_nic *efx, int tx_usecs, int rx_usecs, |
1225 | bool rx_adaptive) | |
8ceee660 BH |
1226 | { |
1227 | struct efx_tx_queue *tx_queue; | |
1228 | struct efx_rx_queue *rx_queue; | |
1229 | ||
1230 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1231 | ||
1232 | efx_for_each_tx_queue(tx_queue, efx) | |
1233 | tx_queue->channel->irq_moderation = tx_usecs; | |
1234 | ||
6fb70fd1 BH |
1235 | efx->irq_rx_adaptive = rx_adaptive; |
1236 | efx->irq_rx_moderation = rx_usecs; | |
8ceee660 BH |
1237 | efx_for_each_rx_queue(rx_queue, efx) |
1238 | rx_queue->channel->irq_moderation = rx_usecs; | |
1239 | } | |
1240 | ||
1241 | /************************************************************************** | |
1242 | * | |
1243 | * Hardware monitor | |
1244 | * | |
1245 | **************************************************************************/ | |
1246 | ||
1247 | /* Run periodically off the general workqueue. Serialised against | |
1248 | * efx_reconfigure_port via the mac_lock */ | |
1249 | static void efx_monitor(struct work_struct *data) | |
1250 | { | |
1251 | struct efx_nic *efx = container_of(data, struct efx_nic, | |
1252 | monitor_work.work); | |
766ca0fa | 1253 | int rc; |
8ceee660 BH |
1254 | |
1255 | EFX_TRACE(efx, "hardware monitor executing on CPU %d\n", | |
1256 | raw_smp_processor_id()); | |
1257 | ||
8ceee660 BH |
1258 | /* If the mac_lock is already held then it is likely a port |
1259 | * reconfiguration is already in place, which will likely do | |
1260 | * most of the work of check_hw() anyway. */ | |
766ca0fa BH |
1261 | if (!mutex_trylock(&efx->mac_lock)) |
1262 | goto out_requeue; | |
1263 | if (!efx->port_enabled) | |
1264 | goto out_unlock; | |
1265 | rc = efx->board_info.monitor(efx); | |
1266 | if (rc) { | |
1267 | EFX_ERR(efx, "Board sensor %s; shutting down PHY\n", | |
1268 | (rc == -ERANGE) ? "reported fault" : "failed"); | |
1269 | efx->phy_mode |= PHY_MODE_LOW_POWER; | |
1270 | falcon_sim_phy_event(efx); | |
8ceee660 | 1271 | } |
766ca0fa BH |
1272 | efx->phy_op->poll(efx); |
1273 | efx->mac_op->poll(efx); | |
8ceee660 | 1274 | |
766ca0fa | 1275 | out_unlock: |
8ceee660 | 1276 | mutex_unlock(&efx->mac_lock); |
766ca0fa | 1277 | out_requeue: |
8ceee660 BH |
1278 | queue_delayed_work(efx->workqueue, &efx->monitor_work, |
1279 | efx_monitor_interval); | |
1280 | } | |
1281 | ||
1282 | /************************************************************************** | |
1283 | * | |
1284 | * ioctls | |
1285 | * | |
1286 | *************************************************************************/ | |
1287 | ||
1288 | /* Net device ioctl | |
1289 | * Context: process, rtnl_lock() held. | |
1290 | */ | |
1291 | static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) | |
1292 | { | |
767e468c | 1293 | struct efx_nic *efx = netdev_priv(net_dev); |
68e7f45e | 1294 | struct mii_ioctl_data *data = if_mii(ifr); |
8ceee660 BH |
1295 | |
1296 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1297 | ||
68e7f45e BH |
1298 | /* Convert phy_id from older PRTAD/DEVAD format */ |
1299 | if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && | |
1300 | (data->phy_id & 0xfc00) == 0x0400) | |
1301 | data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; | |
1302 | ||
1303 | return mdio_mii_ioctl(&efx->mdio, data, cmd); | |
8ceee660 BH |
1304 | } |
1305 | ||
1306 | /************************************************************************** | |
1307 | * | |
1308 | * NAPI interface | |
1309 | * | |
1310 | **************************************************************************/ | |
1311 | ||
1312 | static int efx_init_napi(struct efx_nic *efx) | |
1313 | { | |
1314 | struct efx_channel *channel; | |
8ceee660 BH |
1315 | |
1316 | efx_for_each_channel(channel, efx) { | |
1317 | channel->napi_dev = efx->net_dev; | |
718cff1e BH |
1318 | netif_napi_add(channel->napi_dev, &channel->napi_str, |
1319 | efx_poll, napi_weight); | |
8ceee660 BH |
1320 | } |
1321 | return 0; | |
8ceee660 BH |
1322 | } |
1323 | ||
1324 | static void efx_fini_napi(struct efx_nic *efx) | |
1325 | { | |
1326 | struct efx_channel *channel; | |
1327 | ||
1328 | efx_for_each_channel(channel, efx) { | |
718cff1e BH |
1329 | if (channel->napi_dev) |
1330 | netif_napi_del(&channel->napi_str); | |
8ceee660 BH |
1331 | channel->napi_dev = NULL; |
1332 | } | |
1333 | } | |
1334 | ||
1335 | /************************************************************************** | |
1336 | * | |
1337 | * Kernel netpoll interface | |
1338 | * | |
1339 | *************************************************************************/ | |
1340 | ||
1341 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1342 | ||
1343 | /* Although in the common case interrupts will be disabled, this is not | |
1344 | * guaranteed. However, all our work happens inside the NAPI callback, | |
1345 | * so no locking is required. | |
1346 | */ | |
1347 | static void efx_netpoll(struct net_device *net_dev) | |
1348 | { | |
767e468c | 1349 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1350 | struct efx_channel *channel; |
1351 | ||
64ee3120 | 1352 | efx_for_each_channel(channel, efx) |
8ceee660 BH |
1353 | efx_schedule_channel(channel); |
1354 | } | |
1355 | ||
1356 | #endif | |
1357 | ||
1358 | /************************************************************************** | |
1359 | * | |
1360 | * Kernel net device interface | |
1361 | * | |
1362 | *************************************************************************/ | |
1363 | ||
1364 | /* Context: process, rtnl_lock() held. */ | |
1365 | static int efx_net_open(struct net_device *net_dev) | |
1366 | { | |
767e468c | 1367 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1368 | EFX_ASSERT_RESET_SERIALISED(efx); |
1369 | ||
1370 | EFX_LOG(efx, "opening device %s on CPU %d\n", net_dev->name, | |
1371 | raw_smp_processor_id()); | |
1372 | ||
f4bd954e BH |
1373 | if (efx->state == STATE_DISABLED) |
1374 | return -EIO; | |
f8b87c17 BH |
1375 | if (efx->phy_mode & PHY_MODE_SPECIAL) |
1376 | return -EBUSY; | |
1377 | ||
8ceee660 BH |
1378 | efx_start_all(efx); |
1379 | return 0; | |
1380 | } | |
1381 | ||
1382 | /* Context: process, rtnl_lock() held. | |
1383 | * Note that the kernel will ignore our return code; this method | |
1384 | * should really be a void. | |
1385 | */ | |
1386 | static int efx_net_stop(struct net_device *net_dev) | |
1387 | { | |
767e468c | 1388 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1389 | |
1390 | EFX_LOG(efx, "closing %s on CPU %d\n", net_dev->name, | |
1391 | raw_smp_processor_id()); | |
1392 | ||
f4bd954e BH |
1393 | if (efx->state != STATE_DISABLED) { |
1394 | /* Stop the device and flush all the channels */ | |
1395 | efx_stop_all(efx); | |
1396 | efx_fini_channels(efx); | |
1397 | efx_init_channels(efx); | |
1398 | } | |
8ceee660 BH |
1399 | |
1400 | return 0; | |
1401 | } | |
1402 | ||
1974cc20 BH |
1403 | void efx_stats_disable(struct efx_nic *efx) |
1404 | { | |
1405 | spin_lock(&efx->stats_lock); | |
1406 | ++efx->stats_disable_count; | |
1407 | spin_unlock(&efx->stats_lock); | |
1408 | } | |
1409 | ||
1410 | void efx_stats_enable(struct efx_nic *efx) | |
1411 | { | |
1412 | spin_lock(&efx->stats_lock); | |
1413 | --efx->stats_disable_count; | |
1414 | spin_unlock(&efx->stats_lock); | |
1415 | } | |
1416 | ||
5b9e207c | 1417 | /* Context: process, dev_base_lock or RTNL held, non-blocking. */ |
8ceee660 BH |
1418 | static struct net_device_stats *efx_net_stats(struct net_device *net_dev) |
1419 | { | |
767e468c | 1420 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1421 | struct efx_mac_stats *mac_stats = &efx->mac_stats; |
1422 | struct net_device_stats *stats = &net_dev->stats; | |
1423 | ||
5b9e207c | 1424 | /* Update stats if possible, but do not wait if another thread |
1974cc20 BH |
1425 | * is updating them or if MAC stats fetches are temporarily |
1426 | * disabled; slightly stale stats are acceptable. | |
5b9e207c | 1427 | */ |
8ceee660 BH |
1428 | if (!spin_trylock(&efx->stats_lock)) |
1429 | return stats; | |
1974cc20 | 1430 | if (!efx->stats_disable_count) { |
177dfcd8 | 1431 | efx->mac_op->update_stats(efx); |
8ceee660 BH |
1432 | falcon_update_nic_stats(efx); |
1433 | } | |
1434 | spin_unlock(&efx->stats_lock); | |
1435 | ||
1436 | stats->rx_packets = mac_stats->rx_packets; | |
1437 | stats->tx_packets = mac_stats->tx_packets; | |
1438 | stats->rx_bytes = mac_stats->rx_bytes; | |
1439 | stats->tx_bytes = mac_stats->tx_bytes; | |
1440 | stats->multicast = mac_stats->rx_multicast; | |
1441 | stats->collisions = mac_stats->tx_collision; | |
1442 | stats->rx_length_errors = (mac_stats->rx_gtjumbo + | |
1443 | mac_stats->rx_length_error); | |
1444 | stats->rx_over_errors = efx->n_rx_nodesc_drop_cnt; | |
1445 | stats->rx_crc_errors = mac_stats->rx_bad; | |
1446 | stats->rx_frame_errors = mac_stats->rx_align_error; | |
1447 | stats->rx_fifo_errors = mac_stats->rx_overflow; | |
1448 | stats->rx_missed_errors = mac_stats->rx_missed; | |
1449 | stats->tx_window_errors = mac_stats->tx_late_collision; | |
1450 | ||
1451 | stats->rx_errors = (stats->rx_length_errors + | |
1452 | stats->rx_over_errors + | |
1453 | stats->rx_crc_errors + | |
1454 | stats->rx_frame_errors + | |
1455 | stats->rx_fifo_errors + | |
1456 | stats->rx_missed_errors + | |
1457 | mac_stats->rx_symbol_error); | |
1458 | stats->tx_errors = (stats->tx_window_errors + | |
1459 | mac_stats->tx_bad); | |
1460 | ||
1461 | return stats; | |
1462 | } | |
1463 | ||
1464 | /* Context: netif_tx_lock held, BHs disabled. */ | |
1465 | static void efx_watchdog(struct net_device *net_dev) | |
1466 | { | |
767e468c | 1467 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 | 1468 | |
739bb23d BH |
1469 | EFX_ERR(efx, "TX stuck with stop_count=%d port_enabled=%d:" |
1470 | " resetting channels\n", | |
1471 | atomic_read(&efx->netif_stop_count), efx->port_enabled); | |
8ceee660 | 1472 | |
739bb23d | 1473 | efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); |
8ceee660 BH |
1474 | } |
1475 | ||
1476 | ||
1477 | /* Context: process, rtnl_lock() held. */ | |
1478 | static int efx_change_mtu(struct net_device *net_dev, int new_mtu) | |
1479 | { | |
767e468c | 1480 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1481 | int rc = 0; |
1482 | ||
1483 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1484 | ||
1485 | if (new_mtu > EFX_MAX_MTU) | |
1486 | return -EINVAL; | |
1487 | ||
1488 | efx_stop_all(efx); | |
1489 | ||
1490 | EFX_LOG(efx, "changing MTU to %d\n", new_mtu); | |
1491 | ||
1492 | efx_fini_channels(efx); | |
1493 | net_dev->mtu = new_mtu; | |
bc3c90a2 | 1494 | efx_init_channels(efx); |
8ceee660 BH |
1495 | |
1496 | efx_start_all(efx); | |
1497 | return rc; | |
8ceee660 BH |
1498 | } |
1499 | ||
1500 | static int efx_set_mac_address(struct net_device *net_dev, void *data) | |
1501 | { | |
767e468c | 1502 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1503 | struct sockaddr *addr = data; |
1504 | char *new_addr = addr->sa_data; | |
1505 | ||
1506 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1507 | ||
1508 | if (!is_valid_ether_addr(new_addr)) { | |
e174961c JB |
1509 | EFX_ERR(efx, "invalid ethernet MAC address requested: %pM\n", |
1510 | new_addr); | |
8ceee660 BH |
1511 | return -EINVAL; |
1512 | } | |
1513 | ||
1514 | memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len); | |
1515 | ||
1516 | /* Reconfigure the MAC */ | |
1517 | efx_reconfigure_port(efx); | |
1518 | ||
1519 | return 0; | |
1520 | } | |
1521 | ||
a816f75a | 1522 | /* Context: netif_addr_lock held, BHs disabled. */ |
8ceee660 BH |
1523 | static void efx_set_multicast_list(struct net_device *net_dev) |
1524 | { | |
767e468c | 1525 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1526 | struct dev_mc_list *mc_list = net_dev->mc_list; |
1527 | union efx_multicast_hash *mc_hash = &efx->multicast_hash; | |
a816f75a BH |
1528 | bool promiscuous = !!(net_dev->flags & IFF_PROMISC); |
1529 | bool changed = (efx->promiscuous != promiscuous); | |
8ceee660 BH |
1530 | u32 crc; |
1531 | int bit; | |
1532 | int i; | |
1533 | ||
a816f75a | 1534 | efx->promiscuous = promiscuous; |
8ceee660 BH |
1535 | |
1536 | /* Build multicast hash table */ | |
1537 | if (promiscuous || (net_dev->flags & IFF_ALLMULTI)) { | |
1538 | memset(mc_hash, 0xff, sizeof(*mc_hash)); | |
1539 | } else { | |
1540 | memset(mc_hash, 0x00, sizeof(*mc_hash)); | |
1541 | for (i = 0; i < net_dev->mc_count; i++) { | |
1542 | crc = ether_crc_le(ETH_ALEN, mc_list->dmi_addr); | |
1543 | bit = crc & (EFX_MCAST_HASH_ENTRIES - 1); | |
1544 | set_bit_le(bit, mc_hash->byte); | |
1545 | mc_list = mc_list->next; | |
1546 | } | |
1547 | } | |
1548 | ||
a816f75a BH |
1549 | if (!efx->port_enabled) |
1550 | /* Delay pushing settings until efx_start_port() */ | |
1551 | return; | |
1552 | ||
1553 | if (changed) | |
766ca0fa | 1554 | queue_work(efx->workqueue, &efx->phy_work); |
a816f75a | 1555 | |
8ceee660 BH |
1556 | /* Create and activate new global multicast hash table */ |
1557 | falcon_set_multicast_hash(efx); | |
1558 | } | |
1559 | ||
c3ecb9f3 SH |
1560 | static const struct net_device_ops efx_netdev_ops = { |
1561 | .ndo_open = efx_net_open, | |
1562 | .ndo_stop = efx_net_stop, | |
1563 | .ndo_get_stats = efx_net_stats, | |
1564 | .ndo_tx_timeout = efx_watchdog, | |
1565 | .ndo_start_xmit = efx_hard_start_xmit, | |
1566 | .ndo_validate_addr = eth_validate_addr, | |
1567 | .ndo_do_ioctl = efx_ioctl, | |
1568 | .ndo_change_mtu = efx_change_mtu, | |
1569 | .ndo_set_mac_address = efx_set_mac_address, | |
1570 | .ndo_set_multicast_list = efx_set_multicast_list, | |
1571 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1572 | .ndo_poll_controller = efx_netpoll, | |
1573 | #endif | |
1574 | }; | |
1575 | ||
7dde596e BH |
1576 | static void efx_update_name(struct efx_nic *efx) |
1577 | { | |
1578 | strcpy(efx->name, efx->net_dev->name); | |
1579 | efx_mtd_rename(efx); | |
1580 | efx_set_channel_names(efx); | |
1581 | } | |
1582 | ||
8ceee660 BH |
1583 | static int efx_netdev_event(struct notifier_block *this, |
1584 | unsigned long event, void *ptr) | |
1585 | { | |
d3208b5e | 1586 | struct net_device *net_dev = ptr; |
8ceee660 | 1587 | |
7dde596e BH |
1588 | if (net_dev->netdev_ops == &efx_netdev_ops && |
1589 | event == NETDEV_CHANGENAME) | |
1590 | efx_update_name(netdev_priv(net_dev)); | |
8ceee660 BH |
1591 | |
1592 | return NOTIFY_DONE; | |
1593 | } | |
1594 | ||
1595 | static struct notifier_block efx_netdev_notifier = { | |
1596 | .notifier_call = efx_netdev_event, | |
1597 | }; | |
1598 | ||
06d5e193 BH |
1599 | static ssize_t |
1600 | show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) | |
1601 | { | |
1602 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
1603 | return sprintf(buf, "%d\n", efx->phy_type); | |
1604 | } | |
1605 | static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL); | |
1606 | ||
8ceee660 BH |
1607 | static int efx_register_netdev(struct efx_nic *efx) |
1608 | { | |
1609 | struct net_device *net_dev = efx->net_dev; | |
1610 | int rc; | |
1611 | ||
1612 | net_dev->watchdog_timeo = 5 * HZ; | |
1613 | net_dev->irq = efx->pci_dev->irq; | |
c3ecb9f3 | 1614 | net_dev->netdev_ops = &efx_netdev_ops; |
8ceee660 BH |
1615 | SET_NETDEV_DEV(net_dev, &efx->pci_dev->dev); |
1616 | SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops); | |
1617 | ||
8ceee660 | 1618 | /* Clear MAC statistics */ |
177dfcd8 | 1619 | efx->mac_op->update_stats(efx); |
8ceee660 BH |
1620 | memset(&efx->mac_stats, 0, sizeof(efx->mac_stats)); |
1621 | ||
7dde596e | 1622 | rtnl_lock(); |
aed0628d BH |
1623 | |
1624 | rc = dev_alloc_name(net_dev, net_dev->name); | |
1625 | if (rc < 0) | |
1626 | goto fail_locked; | |
7dde596e | 1627 | efx_update_name(efx); |
aed0628d BH |
1628 | |
1629 | rc = register_netdevice(net_dev); | |
1630 | if (rc) | |
1631 | goto fail_locked; | |
1632 | ||
1633 | /* Always start with carrier off; PHY events will detect the link */ | |
1634 | netif_carrier_off(efx->net_dev); | |
1635 | ||
7dde596e | 1636 | rtnl_unlock(); |
8ceee660 | 1637 | |
06d5e193 BH |
1638 | rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); |
1639 | if (rc) { | |
1640 | EFX_ERR(efx, "failed to init net dev attributes\n"); | |
1641 | goto fail_registered; | |
1642 | } | |
1643 | ||
8ceee660 | 1644 | return 0; |
06d5e193 | 1645 | |
aed0628d BH |
1646 | fail_locked: |
1647 | rtnl_unlock(); | |
1648 | EFX_ERR(efx, "could not register net dev\n"); | |
1649 | return rc; | |
1650 | ||
06d5e193 BH |
1651 | fail_registered: |
1652 | unregister_netdev(net_dev); | |
1653 | return rc; | |
8ceee660 BH |
1654 | } |
1655 | ||
1656 | static void efx_unregister_netdev(struct efx_nic *efx) | |
1657 | { | |
1658 | struct efx_tx_queue *tx_queue; | |
1659 | ||
1660 | if (!efx->net_dev) | |
1661 | return; | |
1662 | ||
767e468c | 1663 | BUG_ON(netdev_priv(efx->net_dev) != efx); |
8ceee660 BH |
1664 | |
1665 | /* Free up any skbs still remaining. This has to happen before | |
1666 | * we try to unregister the netdev as running their destructors | |
1667 | * may be needed to get the device ref. count to 0. */ | |
1668 | efx_for_each_tx_queue(tx_queue, efx) | |
1669 | efx_release_tx_buffers(tx_queue); | |
1670 | ||
55668611 | 1671 | if (efx_dev_registered(efx)) { |
8ceee660 | 1672 | strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); |
06d5e193 | 1673 | device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); |
8ceee660 BH |
1674 | unregister_netdev(efx->net_dev); |
1675 | } | |
1676 | } | |
1677 | ||
1678 | /************************************************************************** | |
1679 | * | |
1680 | * Device reset and suspend | |
1681 | * | |
1682 | **************************************************************************/ | |
1683 | ||
2467ca46 BH |
1684 | /* Tears down the entire software state and most of the hardware state |
1685 | * before reset. */ | |
4b988280 SH |
1686 | void efx_reset_down(struct efx_nic *efx, enum reset_type method, |
1687 | struct ethtool_cmd *ecmd) | |
8ceee660 | 1688 | { |
8ceee660 BH |
1689 | EFX_ASSERT_RESET_SERIALISED(efx); |
1690 | ||
1974cc20 | 1691 | efx_stats_disable(efx); |
2467ca46 BH |
1692 | efx_stop_all(efx); |
1693 | mutex_lock(&efx->mac_lock); | |
f4150724 | 1694 | mutex_lock(&efx->spi_lock); |
2467ca46 | 1695 | |
177dfcd8 | 1696 | efx->phy_op->get_settings(efx, ecmd); |
8ceee660 BH |
1697 | |
1698 | efx_fini_channels(efx); | |
4b988280 SH |
1699 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) |
1700 | efx->phy_op->fini(efx); | |
8ceee660 BH |
1701 | } |
1702 | ||
2467ca46 BH |
1703 | /* This function will always ensure that the locks acquired in |
1704 | * efx_reset_down() are released. A failure return code indicates | |
1705 | * that we were unable to reinitialise the hardware, and the | |
1706 | * driver should be disabled. If ok is false, then the rx and tx | |
1707 | * engines are not restarted, pending a RESET_DISABLE. */ | |
4b988280 SH |
1708 | int efx_reset_up(struct efx_nic *efx, enum reset_type method, |
1709 | struct ethtool_cmd *ecmd, bool ok) | |
8ceee660 BH |
1710 | { |
1711 | int rc; | |
1712 | ||
2467ca46 | 1713 | EFX_ASSERT_RESET_SERIALISED(efx); |
8ceee660 | 1714 | |
2467ca46 | 1715 | rc = falcon_init_nic(efx); |
8ceee660 | 1716 | if (rc) { |
2467ca46 BH |
1717 | EFX_ERR(efx, "failed to initialise NIC\n"); |
1718 | ok = false; | |
8ceee660 BH |
1719 | } |
1720 | ||
4b988280 SH |
1721 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { |
1722 | if (ok) { | |
1723 | rc = efx->phy_op->init(efx); | |
1724 | if (rc) | |
1725 | ok = false; | |
115122af BH |
1726 | } |
1727 | if (!ok) | |
4b988280 SH |
1728 | efx->port_initialized = false; |
1729 | } | |
1730 | ||
2467ca46 BH |
1731 | if (ok) { |
1732 | efx_init_channels(efx); | |
8ceee660 | 1733 | |
177dfcd8 | 1734 | if (efx->phy_op->set_settings(efx, ecmd)) |
2467ca46 BH |
1735 | EFX_ERR(efx, "could not restore PHY settings\n"); |
1736 | } | |
1737 | ||
f4150724 | 1738 | mutex_unlock(&efx->spi_lock); |
2467ca46 BH |
1739 | mutex_unlock(&efx->mac_lock); |
1740 | ||
8c8661e4 | 1741 | if (ok) { |
2467ca46 | 1742 | efx_start_all(efx); |
1974cc20 | 1743 | efx_stats_enable(efx); |
8c8661e4 | 1744 | } |
8ceee660 BH |
1745 | return rc; |
1746 | } | |
1747 | ||
1748 | /* Reset the NIC as transparently as possible. Do not reset the PHY | |
1749 | * Note that the reset may fail, in which case the card will be left | |
1750 | * in a most-probably-unusable state. | |
1751 | * | |
1752 | * This function will sleep. You cannot reset from within an atomic | |
1753 | * state; use efx_schedule_reset() instead. | |
1754 | * | |
1755 | * Grabs the rtnl_lock. | |
1756 | */ | |
1757 | static int efx_reset(struct efx_nic *efx) | |
1758 | { | |
1759 | struct ethtool_cmd ecmd; | |
1760 | enum reset_type method = efx->reset_pending; | |
f4bd954e | 1761 | int rc = 0; |
8ceee660 BH |
1762 | |
1763 | /* Serialise with kernel interfaces */ | |
1764 | rtnl_lock(); | |
1765 | ||
1766 | /* If we're not RUNNING then don't reset. Leave the reset_pending | |
1767 | * flag set so that efx_pci_probe_main will be retried */ | |
1768 | if (efx->state != STATE_RUNNING) { | |
1769 | EFX_INFO(efx, "scheduled reset quenched. NIC not RUNNING\n"); | |
f4bd954e | 1770 | goto out_unlock; |
8ceee660 BH |
1771 | } |
1772 | ||
8ceee660 BH |
1773 | EFX_INFO(efx, "resetting (%d)\n", method); |
1774 | ||
4b988280 | 1775 | efx_reset_down(efx, method, &ecmd); |
8ceee660 BH |
1776 | |
1777 | rc = falcon_reset_hw(efx, method); | |
1778 | if (rc) { | |
1779 | EFX_ERR(efx, "failed to reset hardware\n"); | |
f4bd954e | 1780 | goto out_disable; |
8ceee660 BH |
1781 | } |
1782 | ||
1783 | /* Allow resets to be rescheduled. */ | |
1784 | efx->reset_pending = RESET_TYPE_NONE; | |
1785 | ||
1786 | /* Reinitialise bus-mastering, which may have been turned off before | |
1787 | * the reset was scheduled. This is still appropriate, even in the | |
1788 | * RESET_TYPE_DISABLE since this driver generally assumes the hardware | |
1789 | * can respond to requests. */ | |
1790 | pci_set_master(efx->pci_dev); | |
1791 | ||
8ceee660 BH |
1792 | /* Leave device stopped if necessary */ |
1793 | if (method == RESET_TYPE_DISABLE) { | |
4b988280 | 1794 | efx_reset_up(efx, method, &ecmd, false); |
8ceee660 | 1795 | rc = -EIO; |
f4bd954e | 1796 | } else { |
4b988280 | 1797 | rc = efx_reset_up(efx, method, &ecmd, true); |
8ceee660 BH |
1798 | } |
1799 | ||
f4bd954e BH |
1800 | out_disable: |
1801 | if (rc) { | |
1802 | EFX_ERR(efx, "has been disabled\n"); | |
1803 | efx->state = STATE_DISABLED; | |
1804 | dev_close(efx->net_dev); | |
1805 | } else { | |
1806 | EFX_LOG(efx, "reset complete\n"); | |
1807 | } | |
8ceee660 | 1808 | |
f4bd954e | 1809 | out_unlock: |
8ceee660 | 1810 | rtnl_unlock(); |
8ceee660 BH |
1811 | return rc; |
1812 | } | |
1813 | ||
1814 | /* The worker thread exists so that code that cannot sleep can | |
1815 | * schedule a reset for later. | |
1816 | */ | |
1817 | static void efx_reset_work(struct work_struct *data) | |
1818 | { | |
1819 | struct efx_nic *nic = container_of(data, struct efx_nic, reset_work); | |
1820 | ||
1821 | efx_reset(nic); | |
1822 | } | |
1823 | ||
1824 | void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) | |
1825 | { | |
1826 | enum reset_type method; | |
1827 | ||
1828 | if (efx->reset_pending != RESET_TYPE_NONE) { | |
1829 | EFX_INFO(efx, "quenching already scheduled reset\n"); | |
1830 | return; | |
1831 | } | |
1832 | ||
1833 | switch (type) { | |
1834 | case RESET_TYPE_INVISIBLE: | |
1835 | case RESET_TYPE_ALL: | |
1836 | case RESET_TYPE_WORLD: | |
1837 | case RESET_TYPE_DISABLE: | |
1838 | method = type; | |
1839 | break; | |
1840 | case RESET_TYPE_RX_RECOVERY: | |
1841 | case RESET_TYPE_RX_DESC_FETCH: | |
1842 | case RESET_TYPE_TX_DESC_FETCH: | |
1843 | case RESET_TYPE_TX_SKIP: | |
1844 | method = RESET_TYPE_INVISIBLE; | |
1845 | break; | |
1846 | default: | |
1847 | method = RESET_TYPE_ALL; | |
1848 | break; | |
1849 | } | |
1850 | ||
1851 | if (method != type) | |
1852 | EFX_LOG(efx, "scheduling reset (%d:%d)\n", type, method); | |
1853 | else | |
1854 | EFX_LOG(efx, "scheduling reset (%d)\n", method); | |
1855 | ||
1856 | efx->reset_pending = method; | |
1857 | ||
1ab00629 | 1858 | queue_work(reset_workqueue, &efx->reset_work); |
8ceee660 BH |
1859 | } |
1860 | ||
1861 | /************************************************************************** | |
1862 | * | |
1863 | * List of NICs we support | |
1864 | * | |
1865 | **************************************************************************/ | |
1866 | ||
1867 | /* PCI device ID table */ | |
1868 | static struct pci_device_id efx_pci_table[] __devinitdata = { | |
1869 | {PCI_DEVICE(EFX_VENDID_SFC, FALCON_A_P_DEVID), | |
1870 | .driver_data = (unsigned long) &falcon_a_nic_type}, | |
1871 | {PCI_DEVICE(EFX_VENDID_SFC, FALCON_B_P_DEVID), | |
1872 | .driver_data = (unsigned long) &falcon_b_nic_type}, | |
1873 | {0} /* end of list */ | |
1874 | }; | |
1875 | ||
1876 | /************************************************************************** | |
1877 | * | |
1878 | * Dummy PHY/MAC/Board operations | |
1879 | * | |
01aad7b6 | 1880 | * Can be used for some unimplemented operations |
8ceee660 BH |
1881 | * Needed so all function pointers are valid and do not have to be tested |
1882 | * before use | |
1883 | * | |
1884 | **************************************************************************/ | |
1885 | int efx_port_dummy_op_int(struct efx_nic *efx) | |
1886 | { | |
1887 | return 0; | |
1888 | } | |
1889 | void efx_port_dummy_op_void(struct efx_nic *efx) {} | |
dc8cfa55 | 1890 | void efx_port_dummy_op_blink(struct efx_nic *efx, bool blink) {} |
8ceee660 | 1891 | |
177dfcd8 BH |
1892 | static struct efx_mac_operations efx_dummy_mac_operations = { |
1893 | .reconfigure = efx_port_dummy_op_void, | |
766ca0fa BH |
1894 | .poll = efx_port_dummy_op_void, |
1895 | .irq = efx_port_dummy_op_void, | |
177dfcd8 BH |
1896 | }; |
1897 | ||
8ceee660 BH |
1898 | static struct efx_phy_operations efx_dummy_phy_operations = { |
1899 | .init = efx_port_dummy_op_int, | |
1900 | .reconfigure = efx_port_dummy_op_void, | |
766ca0fa | 1901 | .poll = efx_port_dummy_op_void, |
8ceee660 BH |
1902 | .fini = efx_port_dummy_op_void, |
1903 | .clear_interrupt = efx_port_dummy_op_void, | |
8ceee660 BH |
1904 | }; |
1905 | ||
8ceee660 | 1906 | static struct efx_board efx_dummy_board_info = { |
01aad7b6 | 1907 | .init = efx_port_dummy_op_int, |
8129d217 BH |
1908 | .init_leds = efx_port_dummy_op_void, |
1909 | .set_id_led = efx_port_dummy_op_blink, | |
a17102b1 | 1910 | .monitor = efx_port_dummy_op_int, |
01aad7b6 BH |
1911 | .blink = efx_port_dummy_op_blink, |
1912 | .fini = efx_port_dummy_op_void, | |
8ceee660 BH |
1913 | }; |
1914 | ||
1915 | /************************************************************************** | |
1916 | * | |
1917 | * Data housekeeping | |
1918 | * | |
1919 | **************************************************************************/ | |
1920 | ||
1921 | /* This zeroes out and then fills in the invariants in a struct | |
1922 | * efx_nic (including all sub-structures). | |
1923 | */ | |
1924 | static int efx_init_struct(struct efx_nic *efx, struct efx_nic_type *type, | |
1925 | struct pci_dev *pci_dev, struct net_device *net_dev) | |
1926 | { | |
1927 | struct efx_channel *channel; | |
1928 | struct efx_tx_queue *tx_queue; | |
1929 | struct efx_rx_queue *rx_queue; | |
1ab00629 | 1930 | int i; |
8ceee660 BH |
1931 | |
1932 | /* Initialise common structures */ | |
1933 | memset(efx, 0, sizeof(*efx)); | |
1934 | spin_lock_init(&efx->biu_lock); | |
1935 | spin_lock_init(&efx->phy_lock); | |
f4150724 | 1936 | mutex_init(&efx->spi_lock); |
8ceee660 BH |
1937 | INIT_WORK(&efx->reset_work, efx_reset_work); |
1938 | INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); | |
1939 | efx->pci_dev = pci_dev; | |
1940 | efx->state = STATE_INIT; | |
1941 | efx->reset_pending = RESET_TYPE_NONE; | |
1942 | strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); | |
1943 | efx->board_info = efx_dummy_board_info; | |
1944 | ||
1945 | efx->net_dev = net_dev; | |
dc8cfa55 | 1946 | efx->rx_checksum_enabled = true; |
8ceee660 BH |
1947 | spin_lock_init(&efx->netif_stop_lock); |
1948 | spin_lock_init(&efx->stats_lock); | |
1974cc20 | 1949 | efx->stats_disable_count = 1; |
8ceee660 | 1950 | mutex_init(&efx->mac_lock); |
177dfcd8 | 1951 | efx->mac_op = &efx_dummy_mac_operations; |
8ceee660 | 1952 | efx->phy_op = &efx_dummy_phy_operations; |
68e7f45e | 1953 | efx->mdio.dev = net_dev; |
766ca0fa BH |
1954 | INIT_WORK(&efx->phy_work, efx_phy_work); |
1955 | INIT_WORK(&efx->mac_work, efx_mac_work); | |
8ceee660 BH |
1956 | atomic_set(&efx->netif_stop_count, 1); |
1957 | ||
1958 | for (i = 0; i < EFX_MAX_CHANNELS; i++) { | |
1959 | channel = &efx->channel[i]; | |
1960 | channel->efx = efx; | |
1961 | channel->channel = i; | |
dc8cfa55 | 1962 | channel->work_pending = false; |
8ceee660 | 1963 | } |
60ac1065 | 1964 | for (i = 0; i < EFX_TX_QUEUE_COUNT; i++) { |
8ceee660 BH |
1965 | tx_queue = &efx->tx_queue[i]; |
1966 | tx_queue->efx = efx; | |
1967 | tx_queue->queue = i; | |
1968 | tx_queue->buffer = NULL; | |
1969 | tx_queue->channel = &efx->channel[0]; /* for safety */ | |
b9b39b62 | 1970 | tx_queue->tso_headers_free = NULL; |
8ceee660 BH |
1971 | } |
1972 | for (i = 0; i < EFX_MAX_RX_QUEUES; i++) { | |
1973 | rx_queue = &efx->rx_queue[i]; | |
1974 | rx_queue->efx = efx; | |
1975 | rx_queue->queue = i; | |
1976 | rx_queue->channel = &efx->channel[0]; /* for safety */ | |
1977 | rx_queue->buffer = NULL; | |
1978 | spin_lock_init(&rx_queue->add_lock); | |
1979 | INIT_DELAYED_WORK(&rx_queue->work, efx_rx_work); | |
1980 | } | |
1981 | ||
1982 | efx->type = type; | |
1983 | ||
8ceee660 | 1984 | /* As close as we can get to guaranteeing that we don't overflow */ |
3ffeabdd BH |
1985 | BUILD_BUG_ON(EFX_EVQ_SIZE < EFX_TXQ_SIZE + EFX_RXQ_SIZE); |
1986 | ||
8ceee660 BH |
1987 | EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS); |
1988 | ||
1989 | /* Higher numbered interrupt modes are less capable! */ | |
1990 | efx->interrupt_mode = max(efx->type->max_interrupt_mode, | |
1991 | interrupt_mode); | |
1992 | ||
6977dc63 BH |
1993 | /* Would be good to use the net_dev name, but we're too early */ |
1994 | snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", | |
1995 | pci_name(pci_dev)); | |
1996 | efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); | |
1ab00629 SH |
1997 | if (!efx->workqueue) |
1998 | return -ENOMEM; | |
8d9853d9 | 1999 | |
8ceee660 | 2000 | return 0; |
8ceee660 BH |
2001 | } |
2002 | ||
2003 | static void efx_fini_struct(struct efx_nic *efx) | |
2004 | { | |
2005 | if (efx->workqueue) { | |
2006 | destroy_workqueue(efx->workqueue); | |
2007 | efx->workqueue = NULL; | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | /************************************************************************** | |
2012 | * | |
2013 | * PCI interface | |
2014 | * | |
2015 | **************************************************************************/ | |
2016 | ||
2017 | /* Main body of final NIC shutdown code | |
2018 | * This is called only at module unload (or hotplug removal). | |
2019 | */ | |
2020 | static void efx_pci_remove_main(struct efx_nic *efx) | |
2021 | { | |
2022 | EFX_ASSERT_RESET_SERIALISED(efx); | |
2023 | ||
2024 | /* Skip everything if we never obtained a valid membase */ | |
2025 | if (!efx->membase) | |
2026 | return; | |
2027 | ||
f01865f0 | 2028 | falcon_fini_interrupt(efx); |
8ceee660 BH |
2029 | efx_fini_channels(efx); |
2030 | efx_fini_port(efx); | |
2031 | ||
2032 | /* Shutdown the board, then the NIC and board state */ | |
37b5a603 | 2033 | efx->board_info.fini(efx); |
8ceee660 BH |
2034 | |
2035 | efx_fini_napi(efx); | |
2036 | efx_remove_all(efx); | |
2037 | } | |
2038 | ||
2039 | /* Final NIC shutdown | |
2040 | * This is called only at module unload (or hotplug removal). | |
2041 | */ | |
2042 | static void efx_pci_remove(struct pci_dev *pci_dev) | |
2043 | { | |
2044 | struct efx_nic *efx; | |
2045 | ||
2046 | efx = pci_get_drvdata(pci_dev); | |
2047 | if (!efx) | |
2048 | return; | |
2049 | ||
2050 | /* Mark the NIC as fini, then stop the interface */ | |
2051 | rtnl_lock(); | |
2052 | efx->state = STATE_FINI; | |
2053 | dev_close(efx->net_dev); | |
2054 | ||
2055 | /* Allow any queued efx_resets() to complete */ | |
2056 | rtnl_unlock(); | |
2057 | ||
2058 | if (efx->membase == NULL) | |
2059 | goto out; | |
2060 | ||
2061 | efx_unregister_netdev(efx); | |
2062 | ||
7dde596e BH |
2063 | efx_mtd_remove(efx); |
2064 | ||
8ceee660 BH |
2065 | /* Wait for any scheduled resets to complete. No more will be |
2066 | * scheduled from this point because efx_stop_all() has been | |
2067 | * called, we are no longer registered with driverlink, and | |
2068 | * the net_device's have been removed. */ | |
1ab00629 | 2069 | cancel_work_sync(&efx->reset_work); |
8ceee660 BH |
2070 | |
2071 | efx_pci_remove_main(efx); | |
2072 | ||
2073 | out: | |
2074 | efx_fini_io(efx); | |
2075 | EFX_LOG(efx, "shutdown successful\n"); | |
2076 | ||
2077 | pci_set_drvdata(pci_dev, NULL); | |
2078 | efx_fini_struct(efx); | |
2079 | free_netdev(efx->net_dev); | |
2080 | }; | |
2081 | ||
2082 | /* Main body of NIC initialisation | |
2083 | * This is called at module load (or hotplug insertion, theoretically). | |
2084 | */ | |
2085 | static int efx_pci_probe_main(struct efx_nic *efx) | |
2086 | { | |
2087 | int rc; | |
2088 | ||
2089 | /* Do start-of-day initialisation */ | |
2090 | rc = efx_probe_all(efx); | |
2091 | if (rc) | |
2092 | goto fail1; | |
2093 | ||
2094 | rc = efx_init_napi(efx); | |
2095 | if (rc) | |
2096 | goto fail2; | |
2097 | ||
2098 | /* Initialise the board */ | |
2099 | rc = efx->board_info.init(efx); | |
2100 | if (rc) { | |
2101 | EFX_ERR(efx, "failed to initialise board\n"); | |
2102 | goto fail3; | |
2103 | } | |
2104 | ||
2105 | rc = falcon_init_nic(efx); | |
2106 | if (rc) { | |
2107 | EFX_ERR(efx, "failed to initialise NIC\n"); | |
2108 | goto fail4; | |
2109 | } | |
2110 | ||
2111 | rc = efx_init_port(efx); | |
2112 | if (rc) { | |
2113 | EFX_ERR(efx, "failed to initialise port\n"); | |
2114 | goto fail5; | |
2115 | } | |
2116 | ||
bc3c90a2 | 2117 | efx_init_channels(efx); |
8ceee660 BH |
2118 | |
2119 | rc = falcon_init_interrupt(efx); | |
2120 | if (rc) | |
bc3c90a2 | 2121 | goto fail6; |
8ceee660 BH |
2122 | |
2123 | return 0; | |
2124 | ||
8ceee660 | 2125 | fail6: |
bc3c90a2 | 2126 | efx_fini_channels(efx); |
8ceee660 BH |
2127 | efx_fini_port(efx); |
2128 | fail5: | |
2129 | fail4: | |
a17102b1 | 2130 | efx->board_info.fini(efx); |
8ceee660 BH |
2131 | fail3: |
2132 | efx_fini_napi(efx); | |
2133 | fail2: | |
2134 | efx_remove_all(efx); | |
2135 | fail1: | |
2136 | return rc; | |
2137 | } | |
2138 | ||
2139 | /* NIC initialisation | |
2140 | * | |
2141 | * This is called at module load (or hotplug insertion, | |
2142 | * theoretically). It sets up PCI mappings, tests and resets the NIC, | |
2143 | * sets up and registers the network devices with the kernel and hooks | |
2144 | * the interrupt service routine. It does not prepare the device for | |
2145 | * transmission; this is left to the first time one of the network | |
2146 | * interfaces is brought up (i.e. efx_net_open). | |
2147 | */ | |
2148 | static int __devinit efx_pci_probe(struct pci_dev *pci_dev, | |
2149 | const struct pci_device_id *entry) | |
2150 | { | |
2151 | struct efx_nic_type *type = (struct efx_nic_type *) entry->driver_data; | |
2152 | struct net_device *net_dev; | |
2153 | struct efx_nic *efx; | |
2154 | int i, rc; | |
2155 | ||
2156 | /* Allocate and initialise a struct net_device and struct efx_nic */ | |
2157 | net_dev = alloc_etherdev(sizeof(*efx)); | |
2158 | if (!net_dev) | |
2159 | return -ENOMEM; | |
b9b39b62 | 2160 | net_dev->features |= (NETIF_F_IP_CSUM | NETIF_F_SG | |
97bc5415 BH |
2161 | NETIF_F_HIGHDMA | NETIF_F_TSO | |
2162 | NETIF_F_GRO); | |
28506563 BH |
2163 | /* Mask for features that also apply to VLAN devices */ |
2164 | net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | | |
740847da | 2165 | NETIF_F_HIGHDMA | NETIF_F_TSO); |
767e468c | 2166 | efx = netdev_priv(net_dev); |
8ceee660 BH |
2167 | pci_set_drvdata(pci_dev, efx); |
2168 | rc = efx_init_struct(efx, type, pci_dev, net_dev); | |
2169 | if (rc) | |
2170 | goto fail1; | |
2171 | ||
2172 | EFX_INFO(efx, "Solarflare Communications NIC detected\n"); | |
2173 | ||
2174 | /* Set up basic I/O (BAR mappings etc) */ | |
2175 | rc = efx_init_io(efx); | |
2176 | if (rc) | |
2177 | goto fail2; | |
2178 | ||
2179 | /* No serialisation is required with the reset path because | |
2180 | * we're in STATE_INIT. */ | |
2181 | for (i = 0; i < 5; i++) { | |
2182 | rc = efx_pci_probe_main(efx); | |
8ceee660 BH |
2183 | |
2184 | /* Serialise against efx_reset(). No more resets will be | |
2185 | * scheduled since efx_stop_all() has been called, and we | |
2186 | * have not and never have been registered with either | |
2187 | * the rtnetlink or driverlink layers. */ | |
1ab00629 | 2188 | cancel_work_sync(&efx->reset_work); |
8ceee660 | 2189 | |
fa402b2e SH |
2190 | if (rc == 0) { |
2191 | if (efx->reset_pending != RESET_TYPE_NONE) { | |
2192 | /* If there was a scheduled reset during | |
2193 | * probe, the NIC is probably hosed anyway */ | |
2194 | efx_pci_remove_main(efx); | |
2195 | rc = -EIO; | |
2196 | } else { | |
2197 | break; | |
2198 | } | |
2199 | } | |
2200 | ||
8ceee660 BH |
2201 | /* Retry if a recoverably reset event has been scheduled */ |
2202 | if ((efx->reset_pending != RESET_TYPE_INVISIBLE) && | |
2203 | (efx->reset_pending != RESET_TYPE_ALL)) | |
2204 | goto fail3; | |
2205 | ||
2206 | efx->reset_pending = RESET_TYPE_NONE; | |
2207 | } | |
2208 | ||
2209 | if (rc) { | |
2210 | EFX_ERR(efx, "Could not reset NIC\n"); | |
2211 | goto fail4; | |
2212 | } | |
2213 | ||
2214 | /* Switch to the running state before we expose the device to | |
2215 | * the OS. This is to ensure that the initial gathering of | |
2216 | * MAC stats succeeds. */ | |
8ceee660 | 2217 | efx->state = STATE_RUNNING; |
7dde596e BH |
2218 | |
2219 | efx_mtd_probe(efx); /* allowed to fail */ | |
8ceee660 BH |
2220 | |
2221 | rc = efx_register_netdev(efx); | |
2222 | if (rc) | |
2223 | goto fail5; | |
2224 | ||
2225 | EFX_LOG(efx, "initialisation successful\n"); | |
8ceee660 BH |
2226 | return 0; |
2227 | ||
2228 | fail5: | |
2229 | efx_pci_remove_main(efx); | |
2230 | fail4: | |
2231 | fail3: | |
2232 | efx_fini_io(efx); | |
2233 | fail2: | |
2234 | efx_fini_struct(efx); | |
2235 | fail1: | |
2236 | EFX_LOG(efx, "initialisation failed. rc=%d\n", rc); | |
2237 | free_netdev(net_dev); | |
2238 | return rc; | |
2239 | } | |
2240 | ||
2241 | static struct pci_driver efx_pci_driver = { | |
2242 | .name = EFX_DRIVER_NAME, | |
2243 | .id_table = efx_pci_table, | |
2244 | .probe = efx_pci_probe, | |
2245 | .remove = efx_pci_remove, | |
2246 | }; | |
2247 | ||
2248 | /************************************************************************** | |
2249 | * | |
2250 | * Kernel module interface | |
2251 | * | |
2252 | *************************************************************************/ | |
2253 | ||
2254 | module_param(interrupt_mode, uint, 0444); | |
2255 | MODULE_PARM_DESC(interrupt_mode, | |
2256 | "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); | |
2257 | ||
2258 | static int __init efx_init_module(void) | |
2259 | { | |
2260 | int rc; | |
2261 | ||
2262 | printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); | |
2263 | ||
2264 | rc = register_netdevice_notifier(&efx_netdev_notifier); | |
2265 | if (rc) | |
2266 | goto err_notifier; | |
2267 | ||
2268 | refill_workqueue = create_workqueue("sfc_refill"); | |
2269 | if (!refill_workqueue) { | |
2270 | rc = -ENOMEM; | |
2271 | goto err_refill; | |
2272 | } | |
1ab00629 SH |
2273 | reset_workqueue = create_singlethread_workqueue("sfc_reset"); |
2274 | if (!reset_workqueue) { | |
2275 | rc = -ENOMEM; | |
2276 | goto err_reset; | |
2277 | } | |
8ceee660 BH |
2278 | |
2279 | rc = pci_register_driver(&efx_pci_driver); | |
2280 | if (rc < 0) | |
2281 | goto err_pci; | |
2282 | ||
2283 | return 0; | |
2284 | ||
2285 | err_pci: | |
1ab00629 SH |
2286 | destroy_workqueue(reset_workqueue); |
2287 | err_reset: | |
8ceee660 BH |
2288 | destroy_workqueue(refill_workqueue); |
2289 | err_refill: | |
2290 | unregister_netdevice_notifier(&efx_netdev_notifier); | |
2291 | err_notifier: | |
2292 | return rc; | |
2293 | } | |
2294 | ||
2295 | static void __exit efx_exit_module(void) | |
2296 | { | |
2297 | printk(KERN_INFO "Solarflare NET driver unloading\n"); | |
2298 | ||
2299 | pci_unregister_driver(&efx_pci_driver); | |
1ab00629 | 2300 | destroy_workqueue(reset_workqueue); |
8ceee660 BH |
2301 | destroy_workqueue(refill_workqueue); |
2302 | unregister_netdevice_notifier(&efx_netdev_notifier); | |
2303 | ||
2304 | } | |
2305 | ||
2306 | module_init(efx_init_module); | |
2307 | module_exit(efx_exit_module); | |
2308 | ||
2309 | MODULE_AUTHOR("Michael Brown <mbrown@fensystems.co.uk> and " | |
2310 | "Solarflare Communications"); | |
2311 | MODULE_DESCRIPTION("Solarflare Communications network driver"); | |
2312 | MODULE_LICENSE("GPL"); | |
2313 | MODULE_DEVICE_TABLE(pci, efx_pci_table); |