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5a6681e2 EC |
1 | /**************************************************************************** |
2 | * Driver for Solarflare network controllers and boards | |
3 | * Copyright 2005-2006 Fen Systems Ltd. | |
4 | * Copyright 2005-2013 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/ethtool.h> | |
21 | #include <linux/topology.h> | |
22 | #include <linux/gfp.h> | |
23 | #include <linux/aer.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include "net_driver.h" | |
26 | #include "efx.h" | |
27 | #include "nic.h" | |
28 | #include "selftest.h" | |
29 | ||
30 | #include "workarounds.h" | |
31 | ||
32 | /************************************************************************** | |
33 | * | |
34 | * Type name strings | |
35 | * | |
36 | ************************************************************************** | |
37 | */ | |
38 | ||
39 | /* Loopback mode names (see LOOPBACK_MODE()) */ | |
40 | const unsigned int ef4_loopback_mode_max = LOOPBACK_MAX; | |
41 | const char *const ef4_loopback_mode_names[] = { | |
42 | [LOOPBACK_NONE] = "NONE", | |
43 | [LOOPBACK_DATA] = "DATAPATH", | |
44 | [LOOPBACK_GMAC] = "GMAC", | |
45 | [LOOPBACK_XGMII] = "XGMII", | |
46 | [LOOPBACK_XGXS] = "XGXS", | |
47 | [LOOPBACK_XAUI] = "XAUI", | |
48 | [LOOPBACK_GMII] = "GMII", | |
49 | [LOOPBACK_SGMII] = "SGMII", | |
50 | [LOOPBACK_XGBR] = "XGBR", | |
51 | [LOOPBACK_XFI] = "XFI", | |
52 | [LOOPBACK_XAUI_FAR] = "XAUI_FAR", | |
53 | [LOOPBACK_GMII_FAR] = "GMII_FAR", | |
54 | [LOOPBACK_SGMII_FAR] = "SGMII_FAR", | |
55 | [LOOPBACK_XFI_FAR] = "XFI_FAR", | |
56 | [LOOPBACK_GPHY] = "GPHY", | |
57 | [LOOPBACK_PHYXS] = "PHYXS", | |
58 | [LOOPBACK_PCS] = "PCS", | |
59 | [LOOPBACK_PMAPMD] = "PMA/PMD", | |
60 | [LOOPBACK_XPORT] = "XPORT", | |
61 | [LOOPBACK_XGMII_WS] = "XGMII_WS", | |
62 | [LOOPBACK_XAUI_WS] = "XAUI_WS", | |
63 | [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", | |
64 | [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", | |
65 | [LOOPBACK_GMII_WS] = "GMII_WS", | |
66 | [LOOPBACK_XFI_WS] = "XFI_WS", | |
67 | [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", | |
68 | [LOOPBACK_PHYXS_WS] = "PHYXS_WS", | |
69 | }; | |
70 | ||
71 | const unsigned int ef4_reset_type_max = RESET_TYPE_MAX; | |
72 | const char *const ef4_reset_type_names[] = { | |
73 | [RESET_TYPE_INVISIBLE] = "INVISIBLE", | |
74 | [RESET_TYPE_ALL] = "ALL", | |
75 | [RESET_TYPE_RECOVER_OR_ALL] = "RECOVER_OR_ALL", | |
76 | [RESET_TYPE_WORLD] = "WORLD", | |
77 | [RESET_TYPE_RECOVER_OR_DISABLE] = "RECOVER_OR_DISABLE", | |
78 | [RESET_TYPE_DATAPATH] = "DATAPATH", | |
79 | [RESET_TYPE_DISABLE] = "DISABLE", | |
80 | [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", | |
81 | [RESET_TYPE_INT_ERROR] = "INT_ERROR", | |
82 | [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY", | |
83 | [RESET_TYPE_DMA_ERROR] = "DMA_ERROR", | |
84 | [RESET_TYPE_TX_SKIP] = "TX_SKIP", | |
85 | }; | |
86 | ||
87 | /* Reset workqueue. If any NIC has a hardware failure then a reset will be | |
88 | * queued onto this work queue. This is not a per-nic work queue, because | |
89 | * ef4_reset_work() acquires the rtnl lock, so resets are naturally serialised. | |
90 | */ | |
91 | static struct workqueue_struct *reset_workqueue; | |
92 | ||
93 | /* How often and how many times to poll for a reset while waiting for a | |
94 | * BIST that another function started to complete. | |
95 | */ | |
96 | #define BIST_WAIT_DELAY_MS 100 | |
97 | #define BIST_WAIT_DELAY_COUNT 100 | |
98 | ||
99 | /************************************************************************** | |
100 | * | |
101 | * Configurable values | |
102 | * | |
103 | *************************************************************************/ | |
104 | ||
105 | /* | |
106 | * Use separate channels for TX and RX events | |
107 | * | |
108 | * Set this to 1 to use separate channels for TX and RX. It allows us | |
109 | * to control interrupt affinity separately for TX and RX. | |
110 | * | |
111 | * This is only used in MSI-X interrupt mode | |
112 | */ | |
113 | bool ef4_separate_tx_channels; | |
114 | module_param(ef4_separate_tx_channels, bool, 0444); | |
115 | MODULE_PARM_DESC(ef4_separate_tx_channels, | |
116 | "Use separate channels for TX and RX"); | |
117 | ||
118 | /* This is the weight assigned to each of the (per-channel) virtual | |
119 | * NAPI devices. | |
120 | */ | |
121 | static int napi_weight = 64; | |
122 | ||
123 | /* This is the time (in jiffies) between invocations of the hardware | |
124 | * monitor. | |
125 | * On Falcon-based NICs, this will: | |
126 | * - Check the on-board hardware monitor; | |
127 | * - Poll the link state and reconfigure the hardware as necessary. | |
128 | * On Siena-based NICs for power systems with EEH support, this will give EEH a | |
129 | * chance to start. | |
130 | */ | |
131 | static unsigned int ef4_monitor_interval = 1 * HZ; | |
132 | ||
133 | /* Initial interrupt moderation settings. They can be modified after | |
134 | * module load with ethtool. | |
135 | * | |
136 | * The default for RX should strike a balance between increasing the | |
137 | * round-trip latency and reducing overhead. | |
138 | */ | |
139 | static unsigned int rx_irq_mod_usec = 60; | |
140 | ||
141 | /* Initial interrupt moderation settings. They can be modified after | |
142 | * module load with ethtool. | |
143 | * | |
144 | * This default is chosen to ensure that a 10G link does not go idle | |
145 | * while a TX queue is stopped after it has become full. A queue is | |
146 | * restarted when it drops below half full. The time this takes (assuming | |
147 | * worst case 3 descriptors per packet and 1024 descriptors) is | |
148 | * 512 / 3 * 1.2 = 205 usec. | |
149 | */ | |
150 | static unsigned int tx_irq_mod_usec = 150; | |
151 | ||
152 | /* This is the first interrupt mode to try out of: | |
153 | * 0 => MSI-X | |
154 | * 1 => MSI | |
155 | * 2 => legacy | |
156 | */ | |
157 | static unsigned int interrupt_mode; | |
158 | ||
159 | /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), | |
160 | * i.e. the number of CPUs among which we may distribute simultaneous | |
161 | * interrupt handling. | |
162 | * | |
163 | * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. | |
164 | * The default (0) means to assign an interrupt to each core. | |
165 | */ | |
166 | static unsigned int rss_cpus; | |
167 | module_param(rss_cpus, uint, 0444); | |
168 | MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); | |
169 | ||
170 | static bool phy_flash_cfg; | |
171 | module_param(phy_flash_cfg, bool, 0644); | |
172 | MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); | |
173 | ||
174 | static unsigned irq_adapt_low_thresh = 8000; | |
175 | module_param(irq_adapt_low_thresh, uint, 0644); | |
176 | MODULE_PARM_DESC(irq_adapt_low_thresh, | |
177 | "Threshold score for reducing IRQ moderation"); | |
178 | ||
179 | static unsigned irq_adapt_high_thresh = 16000; | |
180 | module_param(irq_adapt_high_thresh, uint, 0644); | |
181 | MODULE_PARM_DESC(irq_adapt_high_thresh, | |
182 | "Threshold score for increasing IRQ moderation"); | |
183 | ||
184 | static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | | |
185 | NETIF_MSG_LINK | NETIF_MSG_IFDOWN | | |
186 | NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | | |
187 | NETIF_MSG_TX_ERR | NETIF_MSG_HW); | |
188 | module_param(debug, uint, 0); | |
189 | MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); | |
190 | ||
191 | /************************************************************************** | |
192 | * | |
193 | * Utility functions and prototypes | |
194 | * | |
195 | *************************************************************************/ | |
196 | ||
197 | static int ef4_soft_enable_interrupts(struct ef4_nic *efx); | |
198 | static void ef4_soft_disable_interrupts(struct ef4_nic *efx); | |
199 | static void ef4_remove_channel(struct ef4_channel *channel); | |
200 | static void ef4_remove_channels(struct ef4_nic *efx); | |
201 | static const struct ef4_channel_type ef4_default_channel_type; | |
202 | static void ef4_remove_port(struct ef4_nic *efx); | |
203 | static void ef4_init_napi_channel(struct ef4_channel *channel); | |
204 | static void ef4_fini_napi(struct ef4_nic *efx); | |
205 | static void ef4_fini_napi_channel(struct ef4_channel *channel); | |
206 | static void ef4_fini_struct(struct ef4_nic *efx); | |
207 | static void ef4_start_all(struct ef4_nic *efx); | |
208 | static void ef4_stop_all(struct ef4_nic *efx); | |
209 | ||
210 | #define EF4_ASSERT_RESET_SERIALISED(efx) \ | |
211 | do { \ | |
212 | if ((efx->state == STATE_READY) || \ | |
213 | (efx->state == STATE_RECOVERY) || \ | |
214 | (efx->state == STATE_DISABLED)) \ | |
215 | ASSERT_RTNL(); \ | |
216 | } while (0) | |
217 | ||
218 | static int ef4_check_disabled(struct ef4_nic *efx) | |
219 | { | |
220 | if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) { | |
221 | netif_err(efx, drv, efx->net_dev, | |
222 | "device is disabled due to earlier errors\n"); | |
223 | return -EIO; | |
224 | } | |
225 | return 0; | |
226 | } | |
227 | ||
228 | /************************************************************************** | |
229 | * | |
230 | * Event queue processing | |
231 | * | |
232 | *************************************************************************/ | |
233 | ||
234 | /* Process channel's event queue | |
235 | * | |
236 | * This function is responsible for processing the event queue of a | |
237 | * single channel. The caller must guarantee that this function will | |
238 | * never be concurrently called more than once on the same channel, | |
239 | * though different channels may be being processed concurrently. | |
240 | */ | |
241 | static int ef4_process_channel(struct ef4_channel *channel, int budget) | |
242 | { | |
243 | struct ef4_tx_queue *tx_queue; | |
244 | int spent; | |
245 | ||
246 | if (unlikely(!channel->enabled)) | |
247 | return 0; | |
248 | ||
249 | ef4_for_each_channel_tx_queue(tx_queue, channel) { | |
250 | tx_queue->pkts_compl = 0; | |
251 | tx_queue->bytes_compl = 0; | |
252 | } | |
253 | ||
254 | spent = ef4_nic_process_eventq(channel, budget); | |
255 | if (spent && ef4_channel_has_rx_queue(channel)) { | |
256 | struct ef4_rx_queue *rx_queue = | |
257 | ef4_channel_get_rx_queue(channel); | |
258 | ||
259 | ef4_rx_flush_packet(channel); | |
260 | ef4_fast_push_rx_descriptors(rx_queue, true); | |
261 | } | |
262 | ||
263 | /* Update BQL */ | |
264 | ef4_for_each_channel_tx_queue(tx_queue, channel) { | |
265 | if (tx_queue->bytes_compl) { | |
266 | netdev_tx_completed_queue(tx_queue->core_txq, | |
267 | tx_queue->pkts_compl, tx_queue->bytes_compl); | |
268 | } | |
269 | } | |
270 | ||
271 | return spent; | |
272 | } | |
273 | ||
274 | /* NAPI poll handler | |
275 | * | |
276 | * NAPI guarantees serialisation of polls of the same device, which | |
277 | * provides the guarantee required by ef4_process_channel(). | |
278 | */ | |
279 | static void ef4_update_irq_mod(struct ef4_nic *efx, struct ef4_channel *channel) | |
280 | { | |
281 | int step = efx->irq_mod_step_us; | |
282 | ||
283 | if (channel->irq_mod_score < irq_adapt_low_thresh) { | |
284 | if (channel->irq_moderation_us > step) { | |
285 | channel->irq_moderation_us -= step; | |
286 | efx->type->push_irq_moderation(channel); | |
287 | } | |
288 | } else if (channel->irq_mod_score > irq_adapt_high_thresh) { | |
289 | if (channel->irq_moderation_us < | |
290 | efx->irq_rx_moderation_us) { | |
291 | channel->irq_moderation_us += step; | |
292 | efx->type->push_irq_moderation(channel); | |
293 | } | |
294 | } | |
295 | ||
296 | channel->irq_count = 0; | |
297 | channel->irq_mod_score = 0; | |
298 | } | |
299 | ||
300 | static int ef4_poll(struct napi_struct *napi, int budget) | |
301 | { | |
302 | struct ef4_channel *channel = | |
303 | container_of(napi, struct ef4_channel, napi_str); | |
304 | struct ef4_nic *efx = channel->efx; | |
305 | int spent; | |
306 | ||
5a6681e2 EC |
307 | netif_vdbg(efx, intr, efx->net_dev, |
308 | "channel %d NAPI poll executing on CPU %d\n", | |
309 | channel->channel, raw_smp_processor_id()); | |
310 | ||
311 | spent = ef4_process_channel(channel, budget); | |
312 | ||
313 | if (spent < budget) { | |
314 | if (ef4_channel_has_rx_queue(channel) && | |
315 | efx->irq_rx_adaptive && | |
316 | unlikely(++channel->irq_count == 1000)) { | |
317 | ef4_update_irq_mod(efx, channel); | |
318 | } | |
319 | ||
320 | ef4_filter_rfs_expire(channel); | |
321 | ||
322 | /* There is no race here; although napi_disable() will | |
323 | * only wait for napi_complete(), this isn't a problem | |
324 | * since ef4_nic_eventq_read_ack() will have no effect if | |
325 | * interrupts have already been disabled. | |
326 | */ | |
6ad20165 | 327 | napi_complete_done(napi, spent); |
5a6681e2 EC |
328 | ef4_nic_eventq_read_ack(channel); |
329 | } | |
330 | ||
5a6681e2 EC |
331 | return spent; |
332 | } | |
333 | ||
334 | /* Create event queue | |
335 | * Event queue memory allocations are done only once. If the channel | |
336 | * is reset, the memory buffer will be reused; this guards against | |
337 | * errors during channel reset and also simplifies interrupt handling. | |
338 | */ | |
339 | static int ef4_probe_eventq(struct ef4_channel *channel) | |
340 | { | |
341 | struct ef4_nic *efx = channel->efx; | |
342 | unsigned long entries; | |
343 | ||
344 | netif_dbg(efx, probe, efx->net_dev, | |
345 | "chan %d create event queue\n", channel->channel); | |
346 | ||
347 | /* Build an event queue with room for one event per tx and rx buffer, | |
348 | * plus some extra for link state events and MCDI completions. */ | |
349 | entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); | |
350 | EF4_BUG_ON_PARANOID(entries > EF4_MAX_EVQ_SIZE); | |
351 | channel->eventq_mask = max(entries, EF4_MIN_EVQ_SIZE) - 1; | |
352 | ||
353 | return ef4_nic_probe_eventq(channel); | |
354 | } | |
355 | ||
356 | /* Prepare channel's event queue */ | |
357 | static int ef4_init_eventq(struct ef4_channel *channel) | |
358 | { | |
359 | struct ef4_nic *efx = channel->efx; | |
360 | int rc; | |
361 | ||
362 | EF4_WARN_ON_PARANOID(channel->eventq_init); | |
363 | ||
364 | netif_dbg(efx, drv, efx->net_dev, | |
365 | "chan %d init event queue\n", channel->channel); | |
366 | ||
367 | rc = ef4_nic_init_eventq(channel); | |
368 | if (rc == 0) { | |
369 | efx->type->push_irq_moderation(channel); | |
370 | channel->eventq_read_ptr = 0; | |
371 | channel->eventq_init = true; | |
372 | } | |
373 | return rc; | |
374 | } | |
375 | ||
376 | /* Enable event queue processing and NAPI */ | |
377 | void ef4_start_eventq(struct ef4_channel *channel) | |
378 | { | |
379 | netif_dbg(channel->efx, ifup, channel->efx->net_dev, | |
380 | "chan %d start event queue\n", channel->channel); | |
381 | ||
382 | /* Make sure the NAPI handler sees the enabled flag set */ | |
383 | channel->enabled = true; | |
384 | smp_wmb(); | |
385 | ||
5a6681e2 EC |
386 | napi_enable(&channel->napi_str); |
387 | ef4_nic_eventq_read_ack(channel); | |
388 | } | |
389 | ||
390 | /* Disable event queue processing and NAPI */ | |
391 | void ef4_stop_eventq(struct ef4_channel *channel) | |
392 | { | |
393 | if (!channel->enabled) | |
394 | return; | |
395 | ||
396 | napi_disable(&channel->napi_str); | |
5a6681e2 EC |
397 | channel->enabled = false; |
398 | } | |
399 | ||
400 | static void ef4_fini_eventq(struct ef4_channel *channel) | |
401 | { | |
402 | if (!channel->eventq_init) | |
403 | return; | |
404 | ||
405 | netif_dbg(channel->efx, drv, channel->efx->net_dev, | |
406 | "chan %d fini event queue\n", channel->channel); | |
407 | ||
408 | ef4_nic_fini_eventq(channel); | |
409 | channel->eventq_init = false; | |
410 | } | |
411 | ||
412 | static void ef4_remove_eventq(struct ef4_channel *channel) | |
413 | { | |
414 | netif_dbg(channel->efx, drv, channel->efx->net_dev, | |
415 | "chan %d remove event queue\n", channel->channel); | |
416 | ||
417 | ef4_nic_remove_eventq(channel); | |
418 | } | |
419 | ||
420 | /************************************************************************** | |
421 | * | |
422 | * Channel handling | |
423 | * | |
424 | *************************************************************************/ | |
425 | ||
426 | /* Allocate and initialise a channel structure. */ | |
427 | static struct ef4_channel * | |
428 | ef4_alloc_channel(struct ef4_nic *efx, int i, struct ef4_channel *old_channel) | |
429 | { | |
430 | struct ef4_channel *channel; | |
431 | struct ef4_rx_queue *rx_queue; | |
432 | struct ef4_tx_queue *tx_queue; | |
433 | int j; | |
434 | ||
435 | channel = kzalloc(sizeof(*channel), GFP_KERNEL); | |
436 | if (!channel) | |
437 | return NULL; | |
438 | ||
439 | channel->efx = efx; | |
440 | channel->channel = i; | |
441 | channel->type = &ef4_default_channel_type; | |
442 | ||
443 | for (j = 0; j < EF4_TXQ_TYPES; j++) { | |
444 | tx_queue = &channel->tx_queue[j]; | |
445 | tx_queue->efx = efx; | |
446 | tx_queue->queue = i * EF4_TXQ_TYPES + j; | |
447 | tx_queue->channel = channel; | |
448 | } | |
449 | ||
450 | rx_queue = &channel->rx_queue; | |
451 | rx_queue->efx = efx; | |
452 | setup_timer(&rx_queue->slow_fill, ef4_rx_slow_fill, | |
453 | (unsigned long)rx_queue); | |
454 | ||
455 | return channel; | |
456 | } | |
457 | ||
458 | /* Allocate and initialise a channel structure, copying parameters | |
459 | * (but not resources) from an old channel structure. | |
460 | */ | |
461 | static struct ef4_channel * | |
462 | ef4_copy_channel(const struct ef4_channel *old_channel) | |
463 | { | |
464 | struct ef4_channel *channel; | |
465 | struct ef4_rx_queue *rx_queue; | |
466 | struct ef4_tx_queue *tx_queue; | |
467 | int j; | |
468 | ||
469 | channel = kmalloc(sizeof(*channel), GFP_KERNEL); | |
470 | if (!channel) | |
471 | return NULL; | |
472 | ||
473 | *channel = *old_channel; | |
474 | ||
475 | channel->napi_dev = NULL; | |
476 | INIT_HLIST_NODE(&channel->napi_str.napi_hash_node); | |
477 | channel->napi_str.napi_id = 0; | |
478 | channel->napi_str.state = 0; | |
479 | memset(&channel->eventq, 0, sizeof(channel->eventq)); | |
480 | ||
481 | for (j = 0; j < EF4_TXQ_TYPES; j++) { | |
482 | tx_queue = &channel->tx_queue[j]; | |
483 | if (tx_queue->channel) | |
484 | tx_queue->channel = channel; | |
485 | tx_queue->buffer = NULL; | |
486 | memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); | |
487 | } | |
488 | ||
489 | rx_queue = &channel->rx_queue; | |
490 | rx_queue->buffer = NULL; | |
491 | memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); | |
492 | setup_timer(&rx_queue->slow_fill, ef4_rx_slow_fill, | |
493 | (unsigned long)rx_queue); | |
494 | ||
495 | return channel; | |
496 | } | |
497 | ||
498 | static int ef4_probe_channel(struct ef4_channel *channel) | |
499 | { | |
500 | struct ef4_tx_queue *tx_queue; | |
501 | struct ef4_rx_queue *rx_queue; | |
502 | int rc; | |
503 | ||
504 | netif_dbg(channel->efx, probe, channel->efx->net_dev, | |
505 | "creating channel %d\n", channel->channel); | |
506 | ||
507 | rc = channel->type->pre_probe(channel); | |
508 | if (rc) | |
509 | goto fail; | |
510 | ||
511 | rc = ef4_probe_eventq(channel); | |
512 | if (rc) | |
513 | goto fail; | |
514 | ||
515 | ef4_for_each_channel_tx_queue(tx_queue, channel) { | |
516 | rc = ef4_probe_tx_queue(tx_queue); | |
517 | if (rc) | |
518 | goto fail; | |
519 | } | |
520 | ||
521 | ef4_for_each_channel_rx_queue(rx_queue, channel) { | |
522 | rc = ef4_probe_rx_queue(rx_queue); | |
523 | if (rc) | |
524 | goto fail; | |
525 | } | |
526 | ||
527 | return 0; | |
528 | ||
529 | fail: | |
530 | ef4_remove_channel(channel); | |
531 | return rc; | |
532 | } | |
533 | ||
534 | static void | |
535 | ef4_get_channel_name(struct ef4_channel *channel, char *buf, size_t len) | |
536 | { | |
537 | struct ef4_nic *efx = channel->efx; | |
538 | const char *type; | |
539 | int number; | |
540 | ||
541 | number = channel->channel; | |
542 | if (efx->tx_channel_offset == 0) { | |
543 | type = ""; | |
544 | } else if (channel->channel < efx->tx_channel_offset) { | |
545 | type = "-rx"; | |
546 | } else { | |
547 | type = "-tx"; | |
548 | number -= efx->tx_channel_offset; | |
549 | } | |
550 | snprintf(buf, len, "%s%s-%d", efx->name, type, number); | |
551 | } | |
552 | ||
553 | static void ef4_set_channel_names(struct ef4_nic *efx) | |
554 | { | |
555 | struct ef4_channel *channel; | |
556 | ||
557 | ef4_for_each_channel(channel, efx) | |
558 | channel->type->get_name(channel, | |
559 | efx->msi_context[channel->channel].name, | |
560 | sizeof(efx->msi_context[0].name)); | |
561 | } | |
562 | ||
563 | static int ef4_probe_channels(struct ef4_nic *efx) | |
564 | { | |
565 | struct ef4_channel *channel; | |
566 | int rc; | |
567 | ||
568 | /* Restart special buffer allocation */ | |
569 | efx->next_buffer_table = 0; | |
570 | ||
571 | /* Probe channels in reverse, so that any 'extra' channels | |
572 | * use the start of the buffer table. This allows the traffic | |
573 | * channels to be resized without moving them or wasting the | |
574 | * entries before them. | |
575 | */ | |
576 | ef4_for_each_channel_rev(channel, efx) { | |
577 | rc = ef4_probe_channel(channel); | |
578 | if (rc) { | |
579 | netif_err(efx, probe, efx->net_dev, | |
580 | "failed to create channel %d\n", | |
581 | channel->channel); | |
582 | goto fail; | |
583 | } | |
584 | } | |
585 | ef4_set_channel_names(efx); | |
586 | ||
587 | return 0; | |
588 | ||
589 | fail: | |
590 | ef4_remove_channels(efx); | |
591 | return rc; | |
592 | } | |
593 | ||
594 | /* Channels are shutdown and reinitialised whilst the NIC is running | |
595 | * to propagate configuration changes (mtu, checksum offload), or | |
596 | * to clear hardware error conditions | |
597 | */ | |
598 | static void ef4_start_datapath(struct ef4_nic *efx) | |
599 | { | |
600 | netdev_features_t old_features = efx->net_dev->features; | |
601 | bool old_rx_scatter = efx->rx_scatter; | |
602 | struct ef4_tx_queue *tx_queue; | |
603 | struct ef4_rx_queue *rx_queue; | |
604 | struct ef4_channel *channel; | |
605 | size_t rx_buf_len; | |
606 | ||
607 | /* Calculate the rx buffer allocation parameters required to | |
608 | * support the current MTU, including padding for header | |
609 | * alignment and overruns. | |
610 | */ | |
611 | efx->rx_dma_len = (efx->rx_prefix_size + | |
612 | EF4_MAX_FRAME_LEN(efx->net_dev->mtu) + | |
613 | efx->type->rx_buffer_padding); | |
614 | rx_buf_len = (sizeof(struct ef4_rx_page_state) + | |
615 | efx->rx_ip_align + efx->rx_dma_len); | |
616 | if (rx_buf_len <= PAGE_SIZE) { | |
617 | efx->rx_scatter = efx->type->always_rx_scatter; | |
618 | efx->rx_buffer_order = 0; | |
619 | } else if (efx->type->can_rx_scatter) { | |
620 | BUILD_BUG_ON(EF4_RX_USR_BUF_SIZE % L1_CACHE_BYTES); | |
621 | BUILD_BUG_ON(sizeof(struct ef4_rx_page_state) + | |
622 | 2 * ALIGN(NET_IP_ALIGN + EF4_RX_USR_BUF_SIZE, | |
623 | EF4_RX_BUF_ALIGNMENT) > | |
624 | PAGE_SIZE); | |
625 | efx->rx_scatter = true; | |
626 | efx->rx_dma_len = EF4_RX_USR_BUF_SIZE; | |
627 | efx->rx_buffer_order = 0; | |
628 | } else { | |
629 | efx->rx_scatter = false; | |
630 | efx->rx_buffer_order = get_order(rx_buf_len); | |
631 | } | |
632 | ||
633 | ef4_rx_config_page_split(efx); | |
634 | if (efx->rx_buffer_order) | |
635 | netif_dbg(efx, drv, efx->net_dev, | |
636 | "RX buf len=%u; page order=%u batch=%u\n", | |
637 | efx->rx_dma_len, efx->rx_buffer_order, | |
638 | efx->rx_pages_per_batch); | |
639 | else | |
640 | netif_dbg(efx, drv, efx->net_dev, | |
641 | "RX buf len=%u step=%u bpp=%u; page batch=%u\n", | |
642 | efx->rx_dma_len, efx->rx_page_buf_step, | |
643 | efx->rx_bufs_per_page, efx->rx_pages_per_batch); | |
644 | ||
645 | /* Restore previously fixed features in hw_features and remove | |
646 | * features which are fixed now | |
647 | */ | |
648 | efx->net_dev->hw_features |= efx->net_dev->features; | |
649 | efx->net_dev->hw_features &= ~efx->fixed_features; | |
650 | efx->net_dev->features |= efx->fixed_features; | |
651 | if (efx->net_dev->features != old_features) | |
652 | netdev_features_change(efx->net_dev); | |
653 | ||
654 | /* RX filters may also have scatter-enabled flags */ | |
655 | if (efx->rx_scatter != old_rx_scatter) | |
656 | efx->type->filter_update_rx_scatter(efx); | |
657 | ||
658 | /* We must keep at least one descriptor in a TX ring empty. | |
659 | * We could avoid this when the queue size does not exactly | |
660 | * match the hardware ring size, but it's not that important. | |
661 | * Therefore we stop the queue when one more skb might fill | |
662 | * the ring completely. We wake it when half way back to | |
663 | * empty. | |
664 | */ | |
665 | efx->txq_stop_thresh = efx->txq_entries - ef4_tx_max_skb_descs(efx); | |
666 | efx->txq_wake_thresh = efx->txq_stop_thresh / 2; | |
667 | ||
668 | /* Initialise the channels */ | |
669 | ef4_for_each_channel(channel, efx) { | |
670 | ef4_for_each_channel_tx_queue(tx_queue, channel) { | |
671 | ef4_init_tx_queue(tx_queue); | |
672 | atomic_inc(&efx->active_queues); | |
673 | } | |
674 | ||
675 | ef4_for_each_channel_rx_queue(rx_queue, channel) { | |
676 | ef4_init_rx_queue(rx_queue); | |
677 | atomic_inc(&efx->active_queues); | |
678 | ef4_stop_eventq(channel); | |
679 | ef4_fast_push_rx_descriptors(rx_queue, false); | |
680 | ef4_start_eventq(channel); | |
681 | } | |
682 | ||
683 | WARN_ON(channel->rx_pkt_n_frags); | |
684 | } | |
685 | ||
686 | if (netif_device_present(efx->net_dev)) | |
687 | netif_tx_wake_all_queues(efx->net_dev); | |
688 | } | |
689 | ||
690 | static void ef4_stop_datapath(struct ef4_nic *efx) | |
691 | { | |
692 | struct ef4_channel *channel; | |
693 | struct ef4_tx_queue *tx_queue; | |
694 | struct ef4_rx_queue *rx_queue; | |
695 | int rc; | |
696 | ||
697 | EF4_ASSERT_RESET_SERIALISED(efx); | |
698 | BUG_ON(efx->port_enabled); | |
699 | ||
700 | /* Stop RX refill */ | |
701 | ef4_for_each_channel(channel, efx) { | |
702 | ef4_for_each_channel_rx_queue(rx_queue, channel) | |
703 | rx_queue->refill_enabled = false; | |
704 | } | |
705 | ||
706 | ef4_for_each_channel(channel, efx) { | |
707 | /* RX packet processing is pipelined, so wait for the | |
708 | * NAPI handler to complete. At least event queue 0 | |
709 | * might be kept active by non-data events, so don't | |
710 | * use napi_synchronize() but actually disable NAPI | |
711 | * temporarily. | |
712 | */ | |
713 | if (ef4_channel_has_rx_queue(channel)) { | |
714 | ef4_stop_eventq(channel); | |
715 | ef4_start_eventq(channel); | |
716 | } | |
717 | } | |
718 | ||
719 | rc = efx->type->fini_dmaq(efx); | |
720 | if (rc && EF4_WORKAROUND_7803(efx)) { | |
721 | /* Schedule a reset to recover from the flush failure. The | |
722 | * descriptor caches reference memory we're about to free, | |
723 | * but falcon_reconfigure_mac_wrapper() won't reconnect | |
724 | * the MACs because of the pending reset. | |
725 | */ | |
726 | netif_err(efx, drv, efx->net_dev, | |
727 | "Resetting to recover from flush failure\n"); | |
728 | ef4_schedule_reset(efx, RESET_TYPE_ALL); | |
729 | } else if (rc) { | |
730 | netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); | |
731 | } else { | |
732 | netif_dbg(efx, drv, efx->net_dev, | |
733 | "successfully flushed all queues\n"); | |
734 | } | |
735 | ||
736 | ef4_for_each_channel(channel, efx) { | |
737 | ef4_for_each_channel_rx_queue(rx_queue, channel) | |
738 | ef4_fini_rx_queue(rx_queue); | |
739 | ef4_for_each_possible_channel_tx_queue(tx_queue, channel) | |
740 | ef4_fini_tx_queue(tx_queue); | |
741 | } | |
742 | } | |
743 | ||
744 | static void ef4_remove_channel(struct ef4_channel *channel) | |
745 | { | |
746 | struct ef4_tx_queue *tx_queue; | |
747 | struct ef4_rx_queue *rx_queue; | |
748 | ||
749 | netif_dbg(channel->efx, drv, channel->efx->net_dev, | |
750 | "destroy chan %d\n", channel->channel); | |
751 | ||
752 | ef4_for_each_channel_rx_queue(rx_queue, channel) | |
753 | ef4_remove_rx_queue(rx_queue); | |
754 | ef4_for_each_possible_channel_tx_queue(tx_queue, channel) | |
755 | ef4_remove_tx_queue(tx_queue); | |
756 | ef4_remove_eventq(channel); | |
757 | channel->type->post_remove(channel); | |
758 | } | |
759 | ||
760 | static void ef4_remove_channels(struct ef4_nic *efx) | |
761 | { | |
762 | struct ef4_channel *channel; | |
763 | ||
764 | ef4_for_each_channel(channel, efx) | |
765 | ef4_remove_channel(channel); | |
766 | } | |
767 | ||
768 | int | |
769 | ef4_realloc_channels(struct ef4_nic *efx, u32 rxq_entries, u32 txq_entries) | |
770 | { | |
771 | struct ef4_channel *other_channel[EF4_MAX_CHANNELS], *channel; | |
772 | u32 old_rxq_entries, old_txq_entries; | |
773 | unsigned i, next_buffer_table = 0; | |
774 | int rc, rc2; | |
775 | ||
776 | rc = ef4_check_disabled(efx); | |
777 | if (rc) | |
778 | return rc; | |
779 | ||
780 | /* Not all channels should be reallocated. We must avoid | |
781 | * reallocating their buffer table entries. | |
782 | */ | |
783 | ef4_for_each_channel(channel, efx) { | |
784 | struct ef4_rx_queue *rx_queue; | |
785 | struct ef4_tx_queue *tx_queue; | |
786 | ||
787 | if (channel->type->copy) | |
788 | continue; | |
789 | next_buffer_table = max(next_buffer_table, | |
790 | channel->eventq.index + | |
791 | channel->eventq.entries); | |
792 | ef4_for_each_channel_rx_queue(rx_queue, channel) | |
793 | next_buffer_table = max(next_buffer_table, | |
794 | rx_queue->rxd.index + | |
795 | rx_queue->rxd.entries); | |
796 | ef4_for_each_channel_tx_queue(tx_queue, channel) | |
797 | next_buffer_table = max(next_buffer_table, | |
798 | tx_queue->txd.index + | |
799 | tx_queue->txd.entries); | |
800 | } | |
801 | ||
802 | ef4_device_detach_sync(efx); | |
803 | ef4_stop_all(efx); | |
804 | ef4_soft_disable_interrupts(efx); | |
805 | ||
806 | /* Clone channels (where possible) */ | |
807 | memset(other_channel, 0, sizeof(other_channel)); | |
808 | for (i = 0; i < efx->n_channels; i++) { | |
809 | channel = efx->channel[i]; | |
810 | if (channel->type->copy) | |
811 | channel = channel->type->copy(channel); | |
812 | if (!channel) { | |
813 | rc = -ENOMEM; | |
814 | goto out; | |
815 | } | |
816 | other_channel[i] = channel; | |
817 | } | |
818 | ||
819 | /* Swap entry counts and channel pointers */ | |
820 | old_rxq_entries = efx->rxq_entries; | |
821 | old_txq_entries = efx->txq_entries; | |
822 | efx->rxq_entries = rxq_entries; | |
823 | efx->txq_entries = txq_entries; | |
824 | for (i = 0; i < efx->n_channels; i++) { | |
825 | channel = efx->channel[i]; | |
826 | efx->channel[i] = other_channel[i]; | |
827 | other_channel[i] = channel; | |
828 | } | |
829 | ||
830 | /* Restart buffer table allocation */ | |
831 | efx->next_buffer_table = next_buffer_table; | |
832 | ||
833 | for (i = 0; i < efx->n_channels; i++) { | |
834 | channel = efx->channel[i]; | |
835 | if (!channel->type->copy) | |
836 | continue; | |
837 | rc = ef4_probe_channel(channel); | |
838 | if (rc) | |
839 | goto rollback; | |
840 | ef4_init_napi_channel(efx->channel[i]); | |
841 | } | |
842 | ||
843 | out: | |
844 | /* Destroy unused channel structures */ | |
845 | for (i = 0; i < efx->n_channels; i++) { | |
846 | channel = other_channel[i]; | |
847 | if (channel && channel->type->copy) { | |
848 | ef4_fini_napi_channel(channel); | |
849 | ef4_remove_channel(channel); | |
850 | kfree(channel); | |
851 | } | |
852 | } | |
853 | ||
854 | rc2 = ef4_soft_enable_interrupts(efx); | |
855 | if (rc2) { | |
856 | rc = rc ? rc : rc2; | |
857 | netif_err(efx, drv, efx->net_dev, | |
858 | "unable to restart interrupts on channel reallocation\n"); | |
859 | ef4_schedule_reset(efx, RESET_TYPE_DISABLE); | |
860 | } else { | |
861 | ef4_start_all(efx); | |
862 | netif_device_attach(efx->net_dev); | |
863 | } | |
864 | return rc; | |
865 | ||
866 | rollback: | |
867 | /* Swap back */ | |
868 | efx->rxq_entries = old_rxq_entries; | |
869 | efx->txq_entries = old_txq_entries; | |
870 | for (i = 0; i < efx->n_channels; i++) { | |
871 | channel = efx->channel[i]; | |
872 | efx->channel[i] = other_channel[i]; | |
873 | other_channel[i] = channel; | |
874 | } | |
875 | goto out; | |
876 | } | |
877 | ||
878 | void ef4_schedule_slow_fill(struct ef4_rx_queue *rx_queue) | |
879 | { | |
880 | mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); | |
881 | } | |
882 | ||
883 | static const struct ef4_channel_type ef4_default_channel_type = { | |
884 | .pre_probe = ef4_channel_dummy_op_int, | |
885 | .post_remove = ef4_channel_dummy_op_void, | |
886 | .get_name = ef4_get_channel_name, | |
887 | .copy = ef4_copy_channel, | |
888 | .keep_eventq = false, | |
889 | }; | |
890 | ||
891 | int ef4_channel_dummy_op_int(struct ef4_channel *channel) | |
892 | { | |
893 | return 0; | |
894 | } | |
895 | ||
896 | void ef4_channel_dummy_op_void(struct ef4_channel *channel) | |
897 | { | |
898 | } | |
899 | ||
900 | /************************************************************************** | |
901 | * | |
902 | * Port handling | |
903 | * | |
904 | **************************************************************************/ | |
905 | ||
906 | /* This ensures that the kernel is kept informed (via | |
907 | * netif_carrier_on/off) of the link status, and also maintains the | |
908 | * link status's stop on the port's TX queue. | |
909 | */ | |
910 | void ef4_link_status_changed(struct ef4_nic *efx) | |
911 | { | |
912 | struct ef4_link_state *link_state = &efx->link_state; | |
913 | ||
914 | /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure | |
915 | * that no events are triggered between unregister_netdev() and the | |
916 | * driver unloading. A more general condition is that NETDEV_CHANGE | |
917 | * can only be generated between NETDEV_UP and NETDEV_DOWN */ | |
918 | if (!netif_running(efx->net_dev)) | |
919 | return; | |
920 | ||
921 | if (link_state->up != netif_carrier_ok(efx->net_dev)) { | |
922 | efx->n_link_state_changes++; | |
923 | ||
924 | if (link_state->up) | |
925 | netif_carrier_on(efx->net_dev); | |
926 | else | |
927 | netif_carrier_off(efx->net_dev); | |
928 | } | |
929 | ||
930 | /* Status message for kernel log */ | |
931 | if (link_state->up) | |
932 | netif_info(efx, link, efx->net_dev, | |
933 | "link up at %uMbps %s-duplex (MTU %d)\n", | |
934 | link_state->speed, link_state->fd ? "full" : "half", | |
935 | efx->net_dev->mtu); | |
936 | else | |
937 | netif_info(efx, link, efx->net_dev, "link down\n"); | |
938 | } | |
939 | ||
940 | void ef4_link_set_advertising(struct ef4_nic *efx, u32 advertising) | |
941 | { | |
942 | efx->link_advertising = advertising; | |
943 | if (advertising) { | |
944 | if (advertising & ADVERTISED_Pause) | |
945 | efx->wanted_fc |= (EF4_FC_TX | EF4_FC_RX); | |
946 | else | |
947 | efx->wanted_fc &= ~(EF4_FC_TX | EF4_FC_RX); | |
948 | if (advertising & ADVERTISED_Asym_Pause) | |
949 | efx->wanted_fc ^= EF4_FC_TX; | |
950 | } | |
951 | } | |
952 | ||
953 | void ef4_link_set_wanted_fc(struct ef4_nic *efx, u8 wanted_fc) | |
954 | { | |
955 | efx->wanted_fc = wanted_fc; | |
956 | if (efx->link_advertising) { | |
957 | if (wanted_fc & EF4_FC_RX) | |
958 | efx->link_advertising |= (ADVERTISED_Pause | | |
959 | ADVERTISED_Asym_Pause); | |
960 | else | |
961 | efx->link_advertising &= ~(ADVERTISED_Pause | | |
962 | ADVERTISED_Asym_Pause); | |
963 | if (wanted_fc & EF4_FC_TX) | |
964 | efx->link_advertising ^= ADVERTISED_Asym_Pause; | |
965 | } | |
966 | } | |
967 | ||
968 | static void ef4_fini_port(struct ef4_nic *efx); | |
969 | ||
970 | /* We assume that efx->type->reconfigure_mac will always try to sync RX | |
971 | * filters and therefore needs to read-lock the filter table against freeing | |
972 | */ | |
973 | void ef4_mac_reconfigure(struct ef4_nic *efx) | |
974 | { | |
975 | down_read(&efx->filter_sem); | |
976 | efx->type->reconfigure_mac(efx); | |
977 | up_read(&efx->filter_sem); | |
978 | } | |
979 | ||
980 | /* Push loopback/power/transmit disable settings to the PHY, and reconfigure | |
981 | * the MAC appropriately. All other PHY configuration changes are pushed | |
e938ed15 | 982 | * through phy_op->set_link_ksettings(), and pushed asynchronously to the MAC |
5a6681e2 EC |
983 | * through ef4_monitor(). |
984 | * | |
985 | * Callers must hold the mac_lock | |
986 | */ | |
987 | int __ef4_reconfigure_port(struct ef4_nic *efx) | |
988 | { | |
989 | enum ef4_phy_mode phy_mode; | |
990 | int rc; | |
991 | ||
992 | WARN_ON(!mutex_is_locked(&efx->mac_lock)); | |
993 | ||
994 | /* Disable PHY transmit in mac level loopbacks */ | |
995 | phy_mode = efx->phy_mode; | |
996 | if (LOOPBACK_INTERNAL(efx)) | |
997 | efx->phy_mode |= PHY_MODE_TX_DISABLED; | |
998 | else | |
999 | efx->phy_mode &= ~PHY_MODE_TX_DISABLED; | |
1000 | ||
1001 | rc = efx->type->reconfigure_port(efx); | |
1002 | ||
1003 | if (rc) | |
1004 | efx->phy_mode = phy_mode; | |
1005 | ||
1006 | return rc; | |
1007 | } | |
1008 | ||
1009 | /* Reinitialise the MAC to pick up new PHY settings, even if the port is | |
1010 | * disabled. */ | |
1011 | int ef4_reconfigure_port(struct ef4_nic *efx) | |
1012 | { | |
1013 | int rc; | |
1014 | ||
1015 | EF4_ASSERT_RESET_SERIALISED(efx); | |
1016 | ||
1017 | mutex_lock(&efx->mac_lock); | |
1018 | rc = __ef4_reconfigure_port(efx); | |
1019 | mutex_unlock(&efx->mac_lock); | |
1020 | ||
1021 | return rc; | |
1022 | } | |
1023 | ||
1024 | /* Asynchronous work item for changing MAC promiscuity and multicast | |
1025 | * hash. Avoid a drain/rx_ingress enable by reconfiguring the current | |
1026 | * MAC directly. */ | |
1027 | static void ef4_mac_work(struct work_struct *data) | |
1028 | { | |
1029 | struct ef4_nic *efx = container_of(data, struct ef4_nic, mac_work); | |
1030 | ||
1031 | mutex_lock(&efx->mac_lock); | |
1032 | if (efx->port_enabled) | |
1033 | ef4_mac_reconfigure(efx); | |
1034 | mutex_unlock(&efx->mac_lock); | |
1035 | } | |
1036 | ||
1037 | static int ef4_probe_port(struct ef4_nic *efx) | |
1038 | { | |
1039 | int rc; | |
1040 | ||
1041 | netif_dbg(efx, probe, efx->net_dev, "create port\n"); | |
1042 | ||
1043 | if (phy_flash_cfg) | |
1044 | efx->phy_mode = PHY_MODE_SPECIAL; | |
1045 | ||
1046 | /* Connect up MAC/PHY operations table */ | |
1047 | rc = efx->type->probe_port(efx); | |
1048 | if (rc) | |
1049 | return rc; | |
1050 | ||
1051 | /* Initialise MAC address to permanent address */ | |
1052 | ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr); | |
1053 | ||
1054 | return 0; | |
1055 | } | |
1056 | ||
1057 | static int ef4_init_port(struct ef4_nic *efx) | |
1058 | { | |
1059 | int rc; | |
1060 | ||
1061 | netif_dbg(efx, drv, efx->net_dev, "init port\n"); | |
1062 | ||
1063 | mutex_lock(&efx->mac_lock); | |
1064 | ||
1065 | rc = efx->phy_op->init(efx); | |
1066 | if (rc) | |
1067 | goto fail1; | |
1068 | ||
1069 | efx->port_initialized = true; | |
1070 | ||
1071 | /* Reconfigure the MAC before creating dma queues (required for | |
1072 | * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ | |
1073 | ef4_mac_reconfigure(efx); | |
1074 | ||
1075 | /* Ensure the PHY advertises the correct flow control settings */ | |
1076 | rc = efx->phy_op->reconfigure(efx); | |
1077 | if (rc && rc != -EPERM) | |
1078 | goto fail2; | |
1079 | ||
1080 | mutex_unlock(&efx->mac_lock); | |
1081 | return 0; | |
1082 | ||
1083 | fail2: | |
1084 | efx->phy_op->fini(efx); | |
1085 | fail1: | |
1086 | mutex_unlock(&efx->mac_lock); | |
1087 | return rc; | |
1088 | } | |
1089 | ||
1090 | static void ef4_start_port(struct ef4_nic *efx) | |
1091 | { | |
1092 | netif_dbg(efx, ifup, efx->net_dev, "start port\n"); | |
1093 | BUG_ON(efx->port_enabled); | |
1094 | ||
1095 | mutex_lock(&efx->mac_lock); | |
1096 | efx->port_enabled = true; | |
1097 | ||
1098 | /* Ensure MAC ingress/egress is enabled */ | |
1099 | ef4_mac_reconfigure(efx); | |
1100 | ||
1101 | mutex_unlock(&efx->mac_lock); | |
1102 | } | |
1103 | ||
1104 | /* Cancel work for MAC reconfiguration, periodic hardware monitoring | |
1105 | * and the async self-test, wait for them to finish and prevent them | |
1106 | * being scheduled again. This doesn't cover online resets, which | |
1107 | * should only be cancelled when removing the device. | |
1108 | */ | |
1109 | static void ef4_stop_port(struct ef4_nic *efx) | |
1110 | { | |
1111 | netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); | |
1112 | ||
1113 | EF4_ASSERT_RESET_SERIALISED(efx); | |
1114 | ||
1115 | mutex_lock(&efx->mac_lock); | |
1116 | efx->port_enabled = false; | |
1117 | mutex_unlock(&efx->mac_lock); | |
1118 | ||
1119 | /* Serialise against ef4_set_multicast_list() */ | |
1120 | netif_addr_lock_bh(efx->net_dev); | |
1121 | netif_addr_unlock_bh(efx->net_dev); | |
1122 | ||
1123 | cancel_delayed_work_sync(&efx->monitor_work); | |
1124 | ef4_selftest_async_cancel(efx); | |
1125 | cancel_work_sync(&efx->mac_work); | |
1126 | } | |
1127 | ||
1128 | static void ef4_fini_port(struct ef4_nic *efx) | |
1129 | { | |
1130 | netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); | |
1131 | ||
1132 | if (!efx->port_initialized) | |
1133 | return; | |
1134 | ||
1135 | efx->phy_op->fini(efx); | |
1136 | efx->port_initialized = false; | |
1137 | ||
1138 | efx->link_state.up = false; | |
1139 | ef4_link_status_changed(efx); | |
1140 | } | |
1141 | ||
1142 | static void ef4_remove_port(struct ef4_nic *efx) | |
1143 | { | |
1144 | netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); | |
1145 | ||
1146 | efx->type->remove_port(efx); | |
1147 | } | |
1148 | ||
1149 | /************************************************************************** | |
1150 | * | |
1151 | * NIC handling | |
1152 | * | |
1153 | **************************************************************************/ | |
1154 | ||
1155 | static LIST_HEAD(ef4_primary_list); | |
1156 | static LIST_HEAD(ef4_unassociated_list); | |
1157 | ||
1158 | static bool ef4_same_controller(struct ef4_nic *left, struct ef4_nic *right) | |
1159 | { | |
1160 | return left->type == right->type && | |
1161 | left->vpd_sn && right->vpd_sn && | |
1162 | !strcmp(left->vpd_sn, right->vpd_sn); | |
1163 | } | |
1164 | ||
1165 | static void ef4_associate(struct ef4_nic *efx) | |
1166 | { | |
1167 | struct ef4_nic *other, *next; | |
1168 | ||
1169 | if (efx->primary == efx) { | |
1170 | /* Adding primary function; look for secondaries */ | |
1171 | ||
1172 | netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n"); | |
1173 | list_add_tail(&efx->node, &ef4_primary_list); | |
1174 | ||
1175 | list_for_each_entry_safe(other, next, &ef4_unassociated_list, | |
1176 | node) { | |
1177 | if (ef4_same_controller(efx, other)) { | |
1178 | list_del(&other->node); | |
1179 | netif_dbg(other, probe, other->net_dev, | |
1180 | "moving to secondary list of %s %s\n", | |
1181 | pci_name(efx->pci_dev), | |
1182 | efx->net_dev->name); | |
1183 | list_add_tail(&other->node, | |
1184 | &efx->secondary_list); | |
1185 | other->primary = efx; | |
1186 | } | |
1187 | } | |
1188 | } else { | |
1189 | /* Adding secondary function; look for primary */ | |
1190 | ||
1191 | list_for_each_entry(other, &ef4_primary_list, node) { | |
1192 | if (ef4_same_controller(efx, other)) { | |
1193 | netif_dbg(efx, probe, efx->net_dev, | |
1194 | "adding to secondary list of %s %s\n", | |
1195 | pci_name(other->pci_dev), | |
1196 | other->net_dev->name); | |
1197 | list_add_tail(&efx->node, | |
1198 | &other->secondary_list); | |
1199 | efx->primary = other; | |
1200 | return; | |
1201 | } | |
1202 | } | |
1203 | ||
1204 | netif_dbg(efx, probe, efx->net_dev, | |
1205 | "adding to unassociated list\n"); | |
1206 | list_add_tail(&efx->node, &ef4_unassociated_list); | |
1207 | } | |
1208 | } | |
1209 | ||
1210 | static void ef4_dissociate(struct ef4_nic *efx) | |
1211 | { | |
1212 | struct ef4_nic *other, *next; | |
1213 | ||
1214 | list_del(&efx->node); | |
1215 | efx->primary = NULL; | |
1216 | ||
1217 | list_for_each_entry_safe(other, next, &efx->secondary_list, node) { | |
1218 | list_del(&other->node); | |
1219 | netif_dbg(other, probe, other->net_dev, | |
1220 | "moving to unassociated list\n"); | |
1221 | list_add_tail(&other->node, &ef4_unassociated_list); | |
1222 | other->primary = NULL; | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | /* This configures the PCI device to enable I/O and DMA. */ | |
1227 | static int ef4_init_io(struct ef4_nic *efx) | |
1228 | { | |
1229 | struct pci_dev *pci_dev = efx->pci_dev; | |
1230 | dma_addr_t dma_mask = efx->type->max_dma_mask; | |
1231 | unsigned int mem_map_size = efx->type->mem_map_size(efx); | |
1232 | int rc, bar; | |
1233 | ||
1234 | netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); | |
1235 | ||
1236 | bar = efx->type->mem_bar; | |
1237 | ||
1238 | rc = pci_enable_device(pci_dev); | |
1239 | if (rc) { | |
1240 | netif_err(efx, probe, efx->net_dev, | |
1241 | "failed to enable PCI device\n"); | |
1242 | goto fail1; | |
1243 | } | |
1244 | ||
1245 | pci_set_master(pci_dev); | |
1246 | ||
1247 | /* Set the PCI DMA mask. Try all possibilities from our | |
1248 | * genuine mask down to 32 bits, because some architectures | |
1249 | * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit | |
1250 | * masks event though they reject 46 bit masks. | |
1251 | */ | |
1252 | while (dma_mask > 0x7fffffffUL) { | |
1253 | rc = dma_set_mask_and_coherent(&pci_dev->dev, dma_mask); | |
1254 | if (rc == 0) | |
1255 | break; | |
1256 | dma_mask >>= 1; | |
1257 | } | |
1258 | if (rc) { | |
1259 | netif_err(efx, probe, efx->net_dev, | |
1260 | "could not find a suitable DMA mask\n"); | |
1261 | goto fail2; | |
1262 | } | |
1263 | netif_dbg(efx, probe, efx->net_dev, | |
1264 | "using DMA mask %llx\n", (unsigned long long) dma_mask); | |
1265 | ||
1266 | efx->membase_phys = pci_resource_start(efx->pci_dev, bar); | |
1267 | rc = pci_request_region(pci_dev, bar, "sfc"); | |
1268 | if (rc) { | |
1269 | netif_err(efx, probe, efx->net_dev, | |
1270 | "request for memory BAR failed\n"); | |
1271 | rc = -EIO; | |
1272 | goto fail3; | |
1273 | } | |
1274 | efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size); | |
1275 | if (!efx->membase) { | |
1276 | netif_err(efx, probe, efx->net_dev, | |
1277 | "could not map memory BAR at %llx+%x\n", | |
1278 | (unsigned long long)efx->membase_phys, mem_map_size); | |
1279 | rc = -ENOMEM; | |
1280 | goto fail4; | |
1281 | } | |
1282 | netif_dbg(efx, probe, efx->net_dev, | |
1283 | "memory BAR at %llx+%x (virtual %p)\n", | |
1284 | (unsigned long long)efx->membase_phys, mem_map_size, | |
1285 | efx->membase); | |
1286 | ||
1287 | return 0; | |
1288 | ||
1289 | fail4: | |
1290 | pci_release_region(efx->pci_dev, bar); | |
1291 | fail3: | |
1292 | efx->membase_phys = 0; | |
1293 | fail2: | |
1294 | pci_disable_device(efx->pci_dev); | |
1295 | fail1: | |
1296 | return rc; | |
1297 | } | |
1298 | ||
1299 | static void ef4_fini_io(struct ef4_nic *efx) | |
1300 | { | |
1301 | int bar; | |
1302 | ||
1303 | netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); | |
1304 | ||
1305 | if (efx->membase) { | |
1306 | iounmap(efx->membase); | |
1307 | efx->membase = NULL; | |
1308 | } | |
1309 | ||
1310 | if (efx->membase_phys) { | |
1311 | bar = efx->type->mem_bar; | |
1312 | pci_release_region(efx->pci_dev, bar); | |
1313 | efx->membase_phys = 0; | |
1314 | } | |
1315 | ||
1316 | /* Don't disable bus-mastering if VFs are assigned */ | |
1317 | if (!pci_vfs_assigned(efx->pci_dev)) | |
1318 | pci_disable_device(efx->pci_dev); | |
1319 | } | |
1320 | ||
1321 | void ef4_set_default_rx_indir_table(struct ef4_nic *efx) | |
1322 | { | |
1323 | size_t i; | |
1324 | ||
1325 | for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) | |
1326 | efx->rx_indir_table[i] = | |
1327 | ethtool_rxfh_indir_default(i, efx->rss_spread); | |
1328 | } | |
1329 | ||
1330 | static unsigned int ef4_wanted_parallelism(struct ef4_nic *efx) | |
1331 | { | |
1332 | cpumask_var_t thread_mask; | |
1333 | unsigned int count; | |
1334 | int cpu; | |
1335 | ||
1336 | if (rss_cpus) { | |
1337 | count = rss_cpus; | |
1338 | } else { | |
1339 | if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { | |
1340 | netif_warn(efx, probe, efx->net_dev, | |
1341 | "RSS disabled due to allocation failure\n"); | |
1342 | return 1; | |
1343 | } | |
1344 | ||
1345 | count = 0; | |
1346 | for_each_online_cpu(cpu) { | |
1347 | if (!cpumask_test_cpu(cpu, thread_mask)) { | |
1348 | ++count; | |
1349 | cpumask_or(thread_mask, thread_mask, | |
1350 | topology_sibling_cpumask(cpu)); | |
1351 | } | |
1352 | } | |
1353 | ||
1354 | free_cpumask_var(thread_mask); | |
1355 | } | |
1356 | ||
271a8b42 BK |
1357 | if (count > EF4_MAX_RX_QUEUES) { |
1358 | netif_cond_dbg(efx, probe, efx->net_dev, !rss_cpus, warn, | |
1359 | "Reducing number of rx queues from %u to %u.\n", | |
1360 | count, EF4_MAX_RX_QUEUES); | |
1361 | count = EF4_MAX_RX_QUEUES; | |
1362 | } | |
1363 | ||
5a6681e2 EC |
1364 | return count; |
1365 | } | |
1366 | ||
1367 | /* Probe the number and type of interrupts we are able to obtain, and | |
1368 | * the resulting numbers of channels and RX queues. | |
1369 | */ | |
1370 | static int ef4_probe_interrupts(struct ef4_nic *efx) | |
1371 | { | |
1372 | unsigned int extra_channels = 0; | |
1373 | unsigned int i, j; | |
1374 | int rc; | |
1375 | ||
1376 | for (i = 0; i < EF4_MAX_EXTRA_CHANNELS; i++) | |
1377 | if (efx->extra_channel_type[i]) | |
1378 | ++extra_channels; | |
1379 | ||
1380 | if (efx->interrupt_mode == EF4_INT_MODE_MSIX) { | |
1381 | struct msix_entry xentries[EF4_MAX_CHANNELS]; | |
1382 | unsigned int n_channels; | |
1383 | ||
1384 | n_channels = ef4_wanted_parallelism(efx); | |
1385 | if (ef4_separate_tx_channels) | |
1386 | n_channels *= 2; | |
1387 | n_channels += extra_channels; | |
1388 | n_channels = min(n_channels, efx->max_channels); | |
1389 | ||
1390 | for (i = 0; i < n_channels; i++) | |
1391 | xentries[i].entry = i; | |
1392 | rc = pci_enable_msix_range(efx->pci_dev, | |
1393 | xentries, 1, n_channels); | |
1394 | if (rc < 0) { | |
1395 | /* Fall back to single channel MSI */ | |
1396 | efx->interrupt_mode = EF4_INT_MODE_MSI; | |
1397 | netif_err(efx, drv, efx->net_dev, | |
1398 | "could not enable MSI-X\n"); | |
1399 | } else if (rc < n_channels) { | |
1400 | netif_err(efx, drv, efx->net_dev, | |
1401 | "WARNING: Insufficient MSI-X vectors" | |
1402 | " available (%d < %u).\n", rc, n_channels); | |
1403 | netif_err(efx, drv, efx->net_dev, | |
1404 | "WARNING: Performance may be reduced.\n"); | |
1405 | n_channels = rc; | |
1406 | } | |
1407 | ||
1408 | if (rc > 0) { | |
1409 | efx->n_channels = n_channels; | |
1410 | if (n_channels > extra_channels) | |
1411 | n_channels -= extra_channels; | |
1412 | if (ef4_separate_tx_channels) { | |
1413 | efx->n_tx_channels = min(max(n_channels / 2, | |
1414 | 1U), | |
1415 | efx->max_tx_channels); | |
1416 | efx->n_rx_channels = max(n_channels - | |
1417 | efx->n_tx_channels, | |
1418 | 1U); | |
1419 | } else { | |
1420 | efx->n_tx_channels = min(n_channels, | |
1421 | efx->max_tx_channels); | |
1422 | efx->n_rx_channels = n_channels; | |
1423 | } | |
1424 | for (i = 0; i < efx->n_channels; i++) | |
1425 | ef4_get_channel(efx, i)->irq = | |
1426 | xentries[i].vector; | |
1427 | } | |
1428 | } | |
1429 | ||
1430 | /* Try single interrupt MSI */ | |
1431 | if (efx->interrupt_mode == EF4_INT_MODE_MSI) { | |
1432 | efx->n_channels = 1; | |
1433 | efx->n_rx_channels = 1; | |
1434 | efx->n_tx_channels = 1; | |
1435 | rc = pci_enable_msi(efx->pci_dev); | |
1436 | if (rc == 0) { | |
1437 | ef4_get_channel(efx, 0)->irq = efx->pci_dev->irq; | |
1438 | } else { | |
1439 | netif_err(efx, drv, efx->net_dev, | |
1440 | "could not enable MSI\n"); | |
1441 | efx->interrupt_mode = EF4_INT_MODE_LEGACY; | |
1442 | } | |
1443 | } | |
1444 | ||
1445 | /* Assume legacy interrupts */ | |
1446 | if (efx->interrupt_mode == EF4_INT_MODE_LEGACY) { | |
1447 | efx->n_channels = 1 + (ef4_separate_tx_channels ? 1 : 0); | |
1448 | efx->n_rx_channels = 1; | |
1449 | efx->n_tx_channels = 1; | |
1450 | efx->legacy_irq = efx->pci_dev->irq; | |
1451 | } | |
1452 | ||
1453 | /* Assign extra channels if possible */ | |
1454 | j = efx->n_channels; | |
1455 | for (i = 0; i < EF4_MAX_EXTRA_CHANNELS; i++) { | |
1456 | if (!efx->extra_channel_type[i]) | |
1457 | continue; | |
1458 | if (efx->interrupt_mode != EF4_INT_MODE_MSIX || | |
1459 | efx->n_channels <= extra_channels) { | |
1460 | efx->extra_channel_type[i]->handle_no_channel(efx); | |
1461 | } else { | |
1462 | --j; | |
1463 | ef4_get_channel(efx, j)->type = | |
1464 | efx->extra_channel_type[i]; | |
1465 | } | |
1466 | } | |
1467 | ||
1468 | efx->rss_spread = efx->n_rx_channels; | |
1469 | ||
1470 | return 0; | |
1471 | } | |
1472 | ||
1473 | static int ef4_soft_enable_interrupts(struct ef4_nic *efx) | |
1474 | { | |
1475 | struct ef4_channel *channel, *end_channel; | |
1476 | int rc; | |
1477 | ||
1478 | BUG_ON(efx->state == STATE_DISABLED); | |
1479 | ||
1480 | efx->irq_soft_enabled = true; | |
1481 | smp_wmb(); | |
1482 | ||
1483 | ef4_for_each_channel(channel, efx) { | |
1484 | if (!channel->type->keep_eventq) { | |
1485 | rc = ef4_init_eventq(channel); | |
1486 | if (rc) | |
1487 | goto fail; | |
1488 | } | |
1489 | ef4_start_eventq(channel); | |
1490 | } | |
1491 | ||
1492 | return 0; | |
1493 | fail: | |
1494 | end_channel = channel; | |
1495 | ef4_for_each_channel(channel, efx) { | |
1496 | if (channel == end_channel) | |
1497 | break; | |
1498 | ef4_stop_eventq(channel); | |
1499 | if (!channel->type->keep_eventq) | |
1500 | ef4_fini_eventq(channel); | |
1501 | } | |
1502 | ||
1503 | return rc; | |
1504 | } | |
1505 | ||
1506 | static void ef4_soft_disable_interrupts(struct ef4_nic *efx) | |
1507 | { | |
1508 | struct ef4_channel *channel; | |
1509 | ||
1510 | if (efx->state == STATE_DISABLED) | |
1511 | return; | |
1512 | ||
1513 | efx->irq_soft_enabled = false; | |
1514 | smp_wmb(); | |
1515 | ||
1516 | if (efx->legacy_irq) | |
1517 | synchronize_irq(efx->legacy_irq); | |
1518 | ||
1519 | ef4_for_each_channel(channel, efx) { | |
1520 | if (channel->irq) | |
1521 | synchronize_irq(channel->irq); | |
1522 | ||
1523 | ef4_stop_eventq(channel); | |
1524 | if (!channel->type->keep_eventq) | |
1525 | ef4_fini_eventq(channel); | |
1526 | } | |
1527 | } | |
1528 | ||
1529 | static int ef4_enable_interrupts(struct ef4_nic *efx) | |
1530 | { | |
1531 | struct ef4_channel *channel, *end_channel; | |
1532 | int rc; | |
1533 | ||
1534 | BUG_ON(efx->state == STATE_DISABLED); | |
1535 | ||
1536 | if (efx->eeh_disabled_legacy_irq) { | |
1537 | enable_irq(efx->legacy_irq); | |
1538 | efx->eeh_disabled_legacy_irq = false; | |
1539 | } | |
1540 | ||
1541 | efx->type->irq_enable_master(efx); | |
1542 | ||
1543 | ef4_for_each_channel(channel, efx) { | |
1544 | if (channel->type->keep_eventq) { | |
1545 | rc = ef4_init_eventq(channel); | |
1546 | if (rc) | |
1547 | goto fail; | |
1548 | } | |
1549 | } | |
1550 | ||
1551 | rc = ef4_soft_enable_interrupts(efx); | |
1552 | if (rc) | |
1553 | goto fail; | |
1554 | ||
1555 | return 0; | |
1556 | ||
1557 | fail: | |
1558 | end_channel = channel; | |
1559 | ef4_for_each_channel(channel, efx) { | |
1560 | if (channel == end_channel) | |
1561 | break; | |
1562 | if (channel->type->keep_eventq) | |
1563 | ef4_fini_eventq(channel); | |
1564 | } | |
1565 | ||
1566 | efx->type->irq_disable_non_ev(efx); | |
1567 | ||
1568 | return rc; | |
1569 | } | |
1570 | ||
1571 | static void ef4_disable_interrupts(struct ef4_nic *efx) | |
1572 | { | |
1573 | struct ef4_channel *channel; | |
1574 | ||
1575 | ef4_soft_disable_interrupts(efx); | |
1576 | ||
1577 | ef4_for_each_channel(channel, efx) { | |
1578 | if (channel->type->keep_eventq) | |
1579 | ef4_fini_eventq(channel); | |
1580 | } | |
1581 | ||
1582 | efx->type->irq_disable_non_ev(efx); | |
1583 | } | |
1584 | ||
1585 | static void ef4_remove_interrupts(struct ef4_nic *efx) | |
1586 | { | |
1587 | struct ef4_channel *channel; | |
1588 | ||
1589 | /* Remove MSI/MSI-X interrupts */ | |
1590 | ef4_for_each_channel(channel, efx) | |
1591 | channel->irq = 0; | |
1592 | pci_disable_msi(efx->pci_dev); | |
1593 | pci_disable_msix(efx->pci_dev); | |
1594 | ||
1595 | /* Remove legacy interrupt */ | |
1596 | efx->legacy_irq = 0; | |
1597 | } | |
1598 | ||
1599 | static void ef4_set_channels(struct ef4_nic *efx) | |
1600 | { | |
1601 | struct ef4_channel *channel; | |
1602 | struct ef4_tx_queue *tx_queue; | |
1603 | ||
1604 | efx->tx_channel_offset = | |
1605 | ef4_separate_tx_channels ? | |
1606 | efx->n_channels - efx->n_tx_channels : 0; | |
1607 | ||
1608 | /* We need to mark which channels really have RX and TX | |
1609 | * queues, and adjust the TX queue numbers if we have separate | |
1610 | * RX-only and TX-only channels. | |
1611 | */ | |
1612 | ef4_for_each_channel(channel, efx) { | |
1613 | if (channel->channel < efx->n_rx_channels) | |
1614 | channel->rx_queue.core_index = channel->channel; | |
1615 | else | |
1616 | channel->rx_queue.core_index = -1; | |
1617 | ||
1618 | ef4_for_each_channel_tx_queue(tx_queue, channel) | |
1619 | tx_queue->queue -= (efx->tx_channel_offset * | |
1620 | EF4_TXQ_TYPES); | |
1621 | } | |
1622 | } | |
1623 | ||
1624 | static int ef4_probe_nic(struct ef4_nic *efx) | |
1625 | { | |
1626 | int rc; | |
1627 | ||
1628 | netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); | |
1629 | ||
1630 | /* Carry out hardware-type specific initialisation */ | |
1631 | rc = efx->type->probe(efx); | |
1632 | if (rc) | |
1633 | return rc; | |
1634 | ||
1635 | do { | |
1636 | if (!efx->max_channels || !efx->max_tx_channels) { | |
1637 | netif_err(efx, drv, efx->net_dev, | |
1638 | "Insufficient resources to allocate" | |
1639 | " any channels\n"); | |
1640 | rc = -ENOSPC; | |
1641 | goto fail1; | |
1642 | } | |
1643 | ||
1644 | /* Determine the number of channels and queues by trying | |
1645 | * to hook in MSI-X interrupts. | |
1646 | */ | |
1647 | rc = ef4_probe_interrupts(efx); | |
1648 | if (rc) | |
1649 | goto fail1; | |
1650 | ||
1651 | ef4_set_channels(efx); | |
1652 | ||
1653 | /* dimension_resources can fail with EAGAIN */ | |
1654 | rc = efx->type->dimension_resources(efx); | |
1655 | if (rc != 0 && rc != -EAGAIN) | |
1656 | goto fail2; | |
1657 | ||
1658 | if (rc == -EAGAIN) | |
1659 | /* try again with new max_channels */ | |
1660 | ef4_remove_interrupts(efx); | |
1661 | ||
1662 | } while (rc == -EAGAIN); | |
1663 | ||
1664 | if (efx->n_channels > 1) | |
1665 | netdev_rss_key_fill(&efx->rx_hash_key, | |
1666 | sizeof(efx->rx_hash_key)); | |
1667 | ef4_set_default_rx_indir_table(efx); | |
1668 | ||
1669 | netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); | |
1670 | netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); | |
1671 | ||
1672 | /* Initialise the interrupt moderation settings */ | |
1673 | efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000); | |
1674 | ef4_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, | |
1675 | true); | |
1676 | ||
1677 | return 0; | |
1678 | ||
1679 | fail2: | |
1680 | ef4_remove_interrupts(efx); | |
1681 | fail1: | |
1682 | efx->type->remove(efx); | |
1683 | return rc; | |
1684 | } | |
1685 | ||
1686 | static void ef4_remove_nic(struct ef4_nic *efx) | |
1687 | { | |
1688 | netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); | |
1689 | ||
1690 | ef4_remove_interrupts(efx); | |
1691 | efx->type->remove(efx); | |
1692 | } | |
1693 | ||
1694 | static int ef4_probe_filters(struct ef4_nic *efx) | |
1695 | { | |
1696 | int rc; | |
1697 | ||
1698 | spin_lock_init(&efx->filter_lock); | |
1699 | init_rwsem(&efx->filter_sem); | |
1700 | mutex_lock(&efx->mac_lock); | |
1701 | down_write(&efx->filter_sem); | |
1702 | rc = efx->type->filter_table_probe(efx); | |
1703 | if (rc) | |
1704 | goto out_unlock; | |
1705 | ||
1706 | #ifdef CONFIG_RFS_ACCEL | |
1707 | if (efx->type->offload_features & NETIF_F_NTUPLE) { | |
1708 | struct ef4_channel *channel; | |
1709 | int i, success = 1; | |
1710 | ||
1711 | ef4_for_each_channel(channel, efx) { | |
1712 | channel->rps_flow_id = | |
1713 | kcalloc(efx->type->max_rx_ip_filters, | |
1714 | sizeof(*channel->rps_flow_id), | |
1715 | GFP_KERNEL); | |
1716 | if (!channel->rps_flow_id) | |
1717 | success = 0; | |
1718 | else | |
1719 | for (i = 0; | |
1720 | i < efx->type->max_rx_ip_filters; | |
1721 | ++i) | |
1722 | channel->rps_flow_id[i] = | |
1723 | RPS_FLOW_ID_INVALID; | |
1724 | } | |
1725 | ||
1726 | if (!success) { | |
1727 | ef4_for_each_channel(channel, efx) | |
1728 | kfree(channel->rps_flow_id); | |
1729 | efx->type->filter_table_remove(efx); | |
1730 | rc = -ENOMEM; | |
1731 | goto out_unlock; | |
1732 | } | |
1733 | ||
1734 | efx->rps_expire_index = efx->rps_expire_channel = 0; | |
1735 | } | |
1736 | #endif | |
1737 | out_unlock: | |
1738 | up_write(&efx->filter_sem); | |
1739 | mutex_unlock(&efx->mac_lock); | |
1740 | return rc; | |
1741 | } | |
1742 | ||
1743 | static void ef4_remove_filters(struct ef4_nic *efx) | |
1744 | { | |
1745 | #ifdef CONFIG_RFS_ACCEL | |
1746 | struct ef4_channel *channel; | |
1747 | ||
1748 | ef4_for_each_channel(channel, efx) | |
1749 | kfree(channel->rps_flow_id); | |
1750 | #endif | |
1751 | down_write(&efx->filter_sem); | |
1752 | efx->type->filter_table_remove(efx); | |
1753 | up_write(&efx->filter_sem); | |
1754 | } | |
1755 | ||
1756 | static void ef4_restore_filters(struct ef4_nic *efx) | |
1757 | { | |
1758 | down_read(&efx->filter_sem); | |
1759 | efx->type->filter_table_restore(efx); | |
1760 | up_read(&efx->filter_sem); | |
1761 | } | |
1762 | ||
1763 | /************************************************************************** | |
1764 | * | |
1765 | * NIC startup/shutdown | |
1766 | * | |
1767 | *************************************************************************/ | |
1768 | ||
1769 | static int ef4_probe_all(struct ef4_nic *efx) | |
1770 | { | |
1771 | int rc; | |
1772 | ||
1773 | rc = ef4_probe_nic(efx); | |
1774 | if (rc) { | |
1775 | netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); | |
1776 | goto fail1; | |
1777 | } | |
1778 | ||
1779 | rc = ef4_probe_port(efx); | |
1780 | if (rc) { | |
1781 | netif_err(efx, probe, efx->net_dev, "failed to create port\n"); | |
1782 | goto fail2; | |
1783 | } | |
1784 | ||
1785 | BUILD_BUG_ON(EF4_DEFAULT_DMAQ_SIZE < EF4_RXQ_MIN_ENT); | |
1786 | if (WARN_ON(EF4_DEFAULT_DMAQ_SIZE < EF4_TXQ_MIN_ENT(efx))) { | |
1787 | rc = -EINVAL; | |
1788 | goto fail3; | |
1789 | } | |
1790 | efx->rxq_entries = efx->txq_entries = EF4_DEFAULT_DMAQ_SIZE; | |
1791 | ||
1792 | rc = ef4_probe_filters(efx); | |
1793 | if (rc) { | |
1794 | netif_err(efx, probe, efx->net_dev, | |
1795 | "failed to create filter tables\n"); | |
1796 | goto fail4; | |
1797 | } | |
1798 | ||
1799 | rc = ef4_probe_channels(efx); | |
1800 | if (rc) | |
1801 | goto fail5; | |
1802 | ||
1803 | return 0; | |
1804 | ||
1805 | fail5: | |
1806 | ef4_remove_filters(efx); | |
1807 | fail4: | |
1808 | fail3: | |
1809 | ef4_remove_port(efx); | |
1810 | fail2: | |
1811 | ef4_remove_nic(efx); | |
1812 | fail1: | |
1813 | return rc; | |
1814 | } | |
1815 | ||
1816 | /* If the interface is supposed to be running but is not, start | |
1817 | * the hardware and software data path, regular activity for the port | |
1818 | * (MAC statistics, link polling, etc.) and schedule the port to be | |
1819 | * reconfigured. Interrupts must already be enabled. This function | |
1820 | * is safe to call multiple times, so long as the NIC is not disabled. | |
1821 | * Requires the RTNL lock. | |
1822 | */ | |
1823 | static void ef4_start_all(struct ef4_nic *efx) | |
1824 | { | |
1825 | EF4_ASSERT_RESET_SERIALISED(efx); | |
1826 | BUG_ON(efx->state == STATE_DISABLED); | |
1827 | ||
1828 | /* Check that it is appropriate to restart the interface. All | |
1829 | * of these flags are safe to read under just the rtnl lock */ | |
1830 | if (efx->port_enabled || !netif_running(efx->net_dev) || | |
1831 | efx->reset_pending) | |
1832 | return; | |
1833 | ||
1834 | ef4_start_port(efx); | |
1835 | ef4_start_datapath(efx); | |
1836 | ||
1837 | /* Start the hardware monitor if there is one */ | |
1838 | if (efx->type->monitor != NULL) | |
1839 | queue_delayed_work(efx->workqueue, &efx->monitor_work, | |
1840 | ef4_monitor_interval); | |
1841 | ||
1842 | efx->type->start_stats(efx); | |
1843 | efx->type->pull_stats(efx); | |
1844 | spin_lock_bh(&efx->stats_lock); | |
1845 | efx->type->update_stats(efx, NULL, NULL); | |
1846 | spin_unlock_bh(&efx->stats_lock); | |
1847 | } | |
1848 | ||
1849 | /* Quiesce the hardware and software data path, and regular activity | |
1850 | * for the port without bringing the link down. Safe to call multiple | |
1851 | * times with the NIC in almost any state, but interrupts should be | |
1852 | * enabled. Requires the RTNL lock. | |
1853 | */ | |
1854 | static void ef4_stop_all(struct ef4_nic *efx) | |
1855 | { | |
1856 | EF4_ASSERT_RESET_SERIALISED(efx); | |
1857 | ||
1858 | /* port_enabled can be read safely under the rtnl lock */ | |
1859 | if (!efx->port_enabled) | |
1860 | return; | |
1861 | ||
1862 | /* update stats before we go down so we can accurately count | |
1863 | * rx_nodesc_drops | |
1864 | */ | |
1865 | efx->type->pull_stats(efx); | |
1866 | spin_lock_bh(&efx->stats_lock); | |
1867 | efx->type->update_stats(efx, NULL, NULL); | |
1868 | spin_unlock_bh(&efx->stats_lock); | |
1869 | efx->type->stop_stats(efx); | |
1870 | ef4_stop_port(efx); | |
1871 | ||
1872 | /* Stop the kernel transmit interface. This is only valid if | |
1873 | * the device is stopped or detached; otherwise the watchdog | |
1874 | * may fire immediately. | |
1875 | */ | |
1876 | WARN_ON(netif_running(efx->net_dev) && | |
1877 | netif_device_present(efx->net_dev)); | |
1878 | netif_tx_disable(efx->net_dev); | |
1879 | ||
1880 | ef4_stop_datapath(efx); | |
1881 | } | |
1882 | ||
1883 | static void ef4_remove_all(struct ef4_nic *efx) | |
1884 | { | |
1885 | ef4_remove_channels(efx); | |
1886 | ef4_remove_filters(efx); | |
1887 | ef4_remove_port(efx); | |
1888 | ef4_remove_nic(efx); | |
1889 | } | |
1890 | ||
1891 | /************************************************************************** | |
1892 | * | |
1893 | * Interrupt moderation | |
1894 | * | |
1895 | **************************************************************************/ | |
1896 | unsigned int ef4_usecs_to_ticks(struct ef4_nic *efx, unsigned int usecs) | |
1897 | { | |
1898 | if (usecs == 0) | |
1899 | return 0; | |
1900 | if (usecs * 1000 < efx->timer_quantum_ns) | |
1901 | return 1; /* never round down to 0 */ | |
1902 | return usecs * 1000 / efx->timer_quantum_ns; | |
1903 | } | |
1904 | ||
1905 | unsigned int ef4_ticks_to_usecs(struct ef4_nic *efx, unsigned int ticks) | |
1906 | { | |
1907 | /* We must round up when converting ticks to microseconds | |
1908 | * because we round down when converting the other way. | |
1909 | */ | |
1910 | return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000); | |
1911 | } | |
1912 | ||
1913 | /* Set interrupt moderation parameters */ | |
1914 | int ef4_init_irq_moderation(struct ef4_nic *efx, unsigned int tx_usecs, | |
1915 | unsigned int rx_usecs, bool rx_adaptive, | |
1916 | bool rx_may_override_tx) | |
1917 | { | |
1918 | struct ef4_channel *channel; | |
1919 | unsigned int timer_max_us; | |
1920 | ||
1921 | EF4_ASSERT_RESET_SERIALISED(efx); | |
1922 | ||
1923 | timer_max_us = efx->timer_max_ns / 1000; | |
1924 | ||
1925 | if (tx_usecs > timer_max_us || rx_usecs > timer_max_us) | |
1926 | return -EINVAL; | |
1927 | ||
1928 | if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 && | |
1929 | !rx_may_override_tx) { | |
1930 | netif_err(efx, drv, efx->net_dev, "Channels are shared. " | |
1931 | "RX and TX IRQ moderation must be equal\n"); | |
1932 | return -EINVAL; | |
1933 | } | |
1934 | ||
1935 | efx->irq_rx_adaptive = rx_adaptive; | |
1936 | efx->irq_rx_moderation_us = rx_usecs; | |
1937 | ef4_for_each_channel(channel, efx) { | |
1938 | if (ef4_channel_has_rx_queue(channel)) | |
1939 | channel->irq_moderation_us = rx_usecs; | |
1940 | else if (ef4_channel_has_tx_queues(channel)) | |
1941 | channel->irq_moderation_us = tx_usecs; | |
1942 | } | |
1943 | ||
1944 | return 0; | |
1945 | } | |
1946 | ||
1947 | void ef4_get_irq_moderation(struct ef4_nic *efx, unsigned int *tx_usecs, | |
1948 | unsigned int *rx_usecs, bool *rx_adaptive) | |
1949 | { | |
1950 | *rx_adaptive = efx->irq_rx_adaptive; | |
1951 | *rx_usecs = efx->irq_rx_moderation_us; | |
1952 | ||
1953 | /* If channels are shared between RX and TX, so is IRQ | |
1954 | * moderation. Otherwise, IRQ moderation is the same for all | |
1955 | * TX channels and is not adaptive. | |
1956 | */ | |
1957 | if (efx->tx_channel_offset == 0) { | |
1958 | *tx_usecs = *rx_usecs; | |
1959 | } else { | |
1960 | struct ef4_channel *tx_channel; | |
1961 | ||
1962 | tx_channel = efx->channel[efx->tx_channel_offset]; | |
1963 | *tx_usecs = tx_channel->irq_moderation_us; | |
1964 | } | |
1965 | } | |
1966 | ||
1967 | /************************************************************************** | |
1968 | * | |
1969 | * Hardware monitor | |
1970 | * | |
1971 | **************************************************************************/ | |
1972 | ||
1973 | /* Run periodically off the general workqueue */ | |
1974 | static void ef4_monitor(struct work_struct *data) | |
1975 | { | |
1976 | struct ef4_nic *efx = container_of(data, struct ef4_nic, | |
1977 | monitor_work.work); | |
1978 | ||
1979 | netif_vdbg(efx, timer, efx->net_dev, | |
1980 | "hardware monitor executing on CPU %d\n", | |
1981 | raw_smp_processor_id()); | |
1982 | BUG_ON(efx->type->monitor == NULL); | |
1983 | ||
1984 | /* If the mac_lock is already held then it is likely a port | |
1985 | * reconfiguration is already in place, which will likely do | |
1986 | * most of the work of monitor() anyway. */ | |
1987 | if (mutex_trylock(&efx->mac_lock)) { | |
1988 | if (efx->port_enabled) | |
1989 | efx->type->monitor(efx); | |
1990 | mutex_unlock(&efx->mac_lock); | |
1991 | } | |
1992 | ||
1993 | queue_delayed_work(efx->workqueue, &efx->monitor_work, | |
1994 | ef4_monitor_interval); | |
1995 | } | |
1996 | ||
1997 | /************************************************************************** | |
1998 | * | |
1999 | * ioctls | |
2000 | * | |
2001 | *************************************************************************/ | |
2002 | ||
2003 | /* Net device ioctl | |
2004 | * Context: process, rtnl_lock() held. | |
2005 | */ | |
2006 | static int ef4_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) | |
2007 | { | |
2008 | struct ef4_nic *efx = netdev_priv(net_dev); | |
2009 | struct mii_ioctl_data *data = if_mii(ifr); | |
2010 | ||
2011 | /* Convert phy_id from older PRTAD/DEVAD format */ | |
2012 | if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && | |
2013 | (data->phy_id & 0xfc00) == 0x0400) | |
2014 | data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; | |
2015 | ||
2016 | return mdio_mii_ioctl(&efx->mdio, data, cmd); | |
2017 | } | |
2018 | ||
2019 | /************************************************************************** | |
2020 | * | |
2021 | * NAPI interface | |
2022 | * | |
2023 | **************************************************************************/ | |
2024 | ||
2025 | static void ef4_init_napi_channel(struct ef4_channel *channel) | |
2026 | { | |
2027 | struct ef4_nic *efx = channel->efx; | |
2028 | ||
2029 | channel->napi_dev = efx->net_dev; | |
2030 | netif_napi_add(channel->napi_dev, &channel->napi_str, | |
2031 | ef4_poll, napi_weight); | |
5a6681e2 EC |
2032 | } |
2033 | ||
2034 | static void ef4_init_napi(struct ef4_nic *efx) | |
2035 | { | |
2036 | struct ef4_channel *channel; | |
2037 | ||
2038 | ef4_for_each_channel(channel, efx) | |
2039 | ef4_init_napi_channel(channel); | |
2040 | } | |
2041 | ||
2042 | static void ef4_fini_napi_channel(struct ef4_channel *channel) | |
2043 | { | |
2044 | if (channel->napi_dev) | |
2045 | netif_napi_del(&channel->napi_str); | |
2046 | ||
2047 | channel->napi_dev = NULL; | |
2048 | } | |
2049 | ||
2050 | static void ef4_fini_napi(struct ef4_nic *efx) | |
2051 | { | |
2052 | struct ef4_channel *channel; | |
2053 | ||
2054 | ef4_for_each_channel(channel, efx) | |
2055 | ef4_fini_napi_channel(channel); | |
2056 | } | |
2057 | ||
2058 | /************************************************************************** | |
2059 | * | |
2060 | * Kernel netpoll interface | |
2061 | * | |
2062 | *************************************************************************/ | |
2063 | ||
2064 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2065 | ||
2066 | /* Although in the common case interrupts will be disabled, this is not | |
2067 | * guaranteed. However, all our work happens inside the NAPI callback, | |
2068 | * so no locking is required. | |
2069 | */ | |
2070 | static void ef4_netpoll(struct net_device *net_dev) | |
2071 | { | |
2072 | struct ef4_nic *efx = netdev_priv(net_dev); | |
2073 | struct ef4_channel *channel; | |
2074 | ||
2075 | ef4_for_each_channel(channel, efx) | |
2076 | ef4_schedule_channel(channel); | |
2077 | } | |
2078 | ||
2079 | #endif | |
2080 | ||
5a6681e2 EC |
2081 | /************************************************************************** |
2082 | * | |
2083 | * Kernel net device interface | |
2084 | * | |
2085 | *************************************************************************/ | |
2086 | ||
2087 | /* Context: process, rtnl_lock() held. */ | |
2088 | int ef4_net_open(struct net_device *net_dev) | |
2089 | { | |
2090 | struct ef4_nic *efx = netdev_priv(net_dev); | |
2091 | int rc; | |
2092 | ||
2093 | netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", | |
2094 | raw_smp_processor_id()); | |
2095 | ||
2096 | rc = ef4_check_disabled(efx); | |
2097 | if (rc) | |
2098 | return rc; | |
2099 | if (efx->phy_mode & PHY_MODE_SPECIAL) | |
2100 | return -EBUSY; | |
2101 | ||
2102 | /* Notify the kernel of the link state polled during driver load, | |
2103 | * before the monitor starts running */ | |
2104 | ef4_link_status_changed(efx); | |
2105 | ||
2106 | ef4_start_all(efx); | |
2107 | ef4_selftest_async_start(efx); | |
2108 | return 0; | |
2109 | } | |
2110 | ||
2111 | /* Context: process, rtnl_lock() held. | |
2112 | * Note that the kernel will ignore our return code; this method | |
2113 | * should really be a void. | |
2114 | */ | |
2115 | int ef4_net_stop(struct net_device *net_dev) | |
2116 | { | |
2117 | struct ef4_nic *efx = netdev_priv(net_dev); | |
2118 | ||
2119 | netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", | |
2120 | raw_smp_processor_id()); | |
2121 | ||
2122 | /* Stop the device and flush all the channels */ | |
2123 | ef4_stop_all(efx); | |
2124 | ||
2125 | return 0; | |
2126 | } | |
2127 | ||
2128 | /* Context: process, dev_base_lock or RTNL held, non-blocking. */ | |
bc1f4470 | 2129 | static void ef4_net_stats(struct net_device *net_dev, |
2130 | struct rtnl_link_stats64 *stats) | |
5a6681e2 EC |
2131 | { |
2132 | struct ef4_nic *efx = netdev_priv(net_dev); | |
2133 | ||
2134 | spin_lock_bh(&efx->stats_lock); | |
2135 | efx->type->update_stats(efx, NULL, stats); | |
2136 | spin_unlock_bh(&efx->stats_lock); | |
5a6681e2 EC |
2137 | } |
2138 | ||
2139 | /* Context: netif_tx_lock held, BHs disabled. */ | |
2140 | static void ef4_watchdog(struct net_device *net_dev) | |
2141 | { | |
2142 | struct ef4_nic *efx = netdev_priv(net_dev); | |
2143 | ||
2144 | netif_err(efx, tx_err, efx->net_dev, | |
2145 | "TX stuck with port_enabled=%d: resetting channels\n", | |
2146 | efx->port_enabled); | |
2147 | ||
2148 | ef4_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); | |
2149 | } | |
2150 | ||
2151 | ||
2152 | /* Context: process, rtnl_lock() held. */ | |
2153 | static int ef4_change_mtu(struct net_device *net_dev, int new_mtu) | |
2154 | { | |
2155 | struct ef4_nic *efx = netdev_priv(net_dev); | |
2156 | int rc; | |
2157 | ||
2158 | rc = ef4_check_disabled(efx); | |
2159 | if (rc) | |
2160 | return rc; | |
2161 | ||
2162 | netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); | |
2163 | ||
2164 | ef4_device_detach_sync(efx); | |
2165 | ef4_stop_all(efx); | |
2166 | ||
2167 | mutex_lock(&efx->mac_lock); | |
2168 | net_dev->mtu = new_mtu; | |
2169 | ef4_mac_reconfigure(efx); | |
2170 | mutex_unlock(&efx->mac_lock); | |
2171 | ||
2172 | ef4_start_all(efx); | |
2173 | netif_device_attach(efx->net_dev); | |
2174 | return 0; | |
2175 | } | |
2176 | ||
2177 | static int ef4_set_mac_address(struct net_device *net_dev, void *data) | |
2178 | { | |
2179 | struct ef4_nic *efx = netdev_priv(net_dev); | |
2180 | struct sockaddr *addr = data; | |
2181 | u8 *new_addr = addr->sa_data; | |
2182 | u8 old_addr[6]; | |
2183 | int rc; | |
2184 | ||
2185 | if (!is_valid_ether_addr(new_addr)) { | |
2186 | netif_err(efx, drv, efx->net_dev, | |
2187 | "invalid ethernet MAC address requested: %pM\n", | |
2188 | new_addr); | |
2189 | return -EADDRNOTAVAIL; | |
2190 | } | |
2191 | ||
2192 | /* save old address */ | |
2193 | ether_addr_copy(old_addr, net_dev->dev_addr); | |
2194 | ether_addr_copy(net_dev->dev_addr, new_addr); | |
2195 | if (efx->type->set_mac_address) { | |
2196 | rc = efx->type->set_mac_address(efx); | |
2197 | if (rc) { | |
2198 | ether_addr_copy(net_dev->dev_addr, old_addr); | |
2199 | return rc; | |
2200 | } | |
2201 | } | |
2202 | ||
2203 | /* Reconfigure the MAC */ | |
2204 | mutex_lock(&efx->mac_lock); | |
2205 | ef4_mac_reconfigure(efx); | |
2206 | mutex_unlock(&efx->mac_lock); | |
2207 | ||
2208 | return 0; | |
2209 | } | |
2210 | ||
2211 | /* Context: netif_addr_lock held, BHs disabled. */ | |
2212 | static void ef4_set_rx_mode(struct net_device *net_dev) | |
2213 | { | |
2214 | struct ef4_nic *efx = netdev_priv(net_dev); | |
2215 | ||
2216 | if (efx->port_enabled) | |
2217 | queue_work(efx->workqueue, &efx->mac_work); | |
2218 | /* Otherwise ef4_start_port() will do this */ | |
2219 | } | |
2220 | ||
2221 | static int ef4_set_features(struct net_device *net_dev, netdev_features_t data) | |
2222 | { | |
2223 | struct ef4_nic *efx = netdev_priv(net_dev); | |
2224 | int rc; | |
2225 | ||
2226 | /* If disabling RX n-tuple filtering, clear existing filters */ | |
2227 | if (net_dev->features & ~data & NETIF_F_NTUPLE) { | |
2228 | rc = efx->type->filter_clear_rx(efx, EF4_FILTER_PRI_MANUAL); | |
2229 | if (rc) | |
2230 | return rc; | |
2231 | } | |
2232 | ||
2233 | /* If Rx VLAN filter is changed, update filters via mac_reconfigure */ | |
2234 | if ((net_dev->features ^ data) & NETIF_F_HW_VLAN_CTAG_FILTER) { | |
2235 | /* ef4_set_rx_mode() will schedule MAC work to update filters | |
2236 | * when a new features are finally set in net_dev. | |
2237 | */ | |
2238 | ef4_set_rx_mode(net_dev); | |
2239 | } | |
2240 | ||
2241 | return 0; | |
2242 | } | |
2243 | ||
2244 | static const struct net_device_ops ef4_netdev_ops = { | |
2245 | .ndo_open = ef4_net_open, | |
2246 | .ndo_stop = ef4_net_stop, | |
2247 | .ndo_get_stats64 = ef4_net_stats, | |
2248 | .ndo_tx_timeout = ef4_watchdog, | |
2249 | .ndo_start_xmit = ef4_hard_start_xmit, | |
2250 | .ndo_validate_addr = eth_validate_addr, | |
2251 | .ndo_do_ioctl = ef4_ioctl, | |
2252 | .ndo_change_mtu = ef4_change_mtu, | |
2253 | .ndo_set_mac_address = ef4_set_mac_address, | |
2254 | .ndo_set_rx_mode = ef4_set_rx_mode, | |
2255 | .ndo_set_features = ef4_set_features, | |
2256 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2257 | .ndo_poll_controller = ef4_netpoll, | |
2258 | #endif | |
2259 | .ndo_setup_tc = ef4_setup_tc, | |
5a6681e2 EC |
2260 | #ifdef CONFIG_RFS_ACCEL |
2261 | .ndo_rx_flow_steer = ef4_filter_rfs, | |
2262 | #endif | |
2263 | }; | |
2264 | ||
2265 | static void ef4_update_name(struct ef4_nic *efx) | |
2266 | { | |
2267 | strcpy(efx->name, efx->net_dev->name); | |
2268 | ef4_mtd_rename(efx); | |
2269 | ef4_set_channel_names(efx); | |
2270 | } | |
2271 | ||
2272 | static int ef4_netdev_event(struct notifier_block *this, | |
2273 | unsigned long event, void *ptr) | |
2274 | { | |
2275 | struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); | |
2276 | ||
2277 | if ((net_dev->netdev_ops == &ef4_netdev_ops) && | |
2278 | event == NETDEV_CHANGENAME) | |
2279 | ef4_update_name(netdev_priv(net_dev)); | |
2280 | ||
2281 | return NOTIFY_DONE; | |
2282 | } | |
2283 | ||
2284 | static struct notifier_block ef4_netdev_notifier = { | |
2285 | .notifier_call = ef4_netdev_event, | |
2286 | }; | |
2287 | ||
2288 | static ssize_t | |
2289 | show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) | |
2290 | { | |
2291 | struct ef4_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
2292 | return sprintf(buf, "%d\n", efx->phy_type); | |
2293 | } | |
2294 | static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL); | |
2295 | ||
2296 | static int ef4_register_netdev(struct ef4_nic *efx) | |
2297 | { | |
2298 | struct net_device *net_dev = efx->net_dev; | |
2299 | struct ef4_channel *channel; | |
2300 | int rc; | |
2301 | ||
2302 | net_dev->watchdog_timeo = 5 * HZ; | |
2303 | net_dev->irq = efx->pci_dev->irq; | |
2304 | net_dev->netdev_ops = &ef4_netdev_ops; | |
2305 | net_dev->ethtool_ops = &ef4_ethtool_ops; | |
2306 | net_dev->gso_max_segs = EF4_TSO_MAX_SEGS; | |
2307 | net_dev->min_mtu = EF4_MIN_MTU; | |
2308 | net_dev->max_mtu = EF4_MAX_MTU; | |
2309 | ||
2310 | rtnl_lock(); | |
2311 | ||
2312 | /* Enable resets to be scheduled and check whether any were | |
2313 | * already requested. If so, the NIC is probably hosed so we | |
2314 | * abort. | |
2315 | */ | |
2316 | efx->state = STATE_READY; | |
2317 | smp_mb(); /* ensure we change state before checking reset_pending */ | |
2318 | if (efx->reset_pending) { | |
2319 | netif_err(efx, probe, efx->net_dev, | |
2320 | "aborting probe due to scheduled reset\n"); | |
2321 | rc = -EIO; | |
2322 | goto fail_locked; | |
2323 | } | |
2324 | ||
2325 | rc = dev_alloc_name(net_dev, net_dev->name); | |
2326 | if (rc < 0) | |
2327 | goto fail_locked; | |
2328 | ef4_update_name(efx); | |
2329 | ||
2330 | /* Always start with carrier off; PHY events will detect the link */ | |
2331 | netif_carrier_off(net_dev); | |
2332 | ||
2333 | rc = register_netdevice(net_dev); | |
2334 | if (rc) | |
2335 | goto fail_locked; | |
2336 | ||
2337 | ef4_for_each_channel(channel, efx) { | |
2338 | struct ef4_tx_queue *tx_queue; | |
2339 | ef4_for_each_channel_tx_queue(tx_queue, channel) | |
2340 | ef4_init_tx_queue_core_txq(tx_queue); | |
2341 | } | |
2342 | ||
2343 | ef4_associate(efx); | |
2344 | ||
2345 | rtnl_unlock(); | |
2346 | ||
2347 | rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); | |
2348 | if (rc) { | |
2349 | netif_err(efx, drv, efx->net_dev, | |
2350 | "failed to init net dev attributes\n"); | |
2351 | goto fail_registered; | |
2352 | } | |
2353 | return 0; | |
2354 | ||
2355 | fail_registered: | |
2356 | rtnl_lock(); | |
2357 | ef4_dissociate(efx); | |
2358 | unregister_netdevice(net_dev); | |
2359 | fail_locked: | |
2360 | efx->state = STATE_UNINIT; | |
2361 | rtnl_unlock(); | |
2362 | netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); | |
2363 | return rc; | |
2364 | } | |
2365 | ||
2366 | static void ef4_unregister_netdev(struct ef4_nic *efx) | |
2367 | { | |
2368 | if (!efx->net_dev) | |
2369 | return; | |
2370 | ||
2371 | BUG_ON(netdev_priv(efx->net_dev) != efx); | |
2372 | ||
2373 | if (ef4_dev_registered(efx)) { | |
2374 | strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); | |
2375 | device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); | |
2376 | unregister_netdev(efx->net_dev); | |
2377 | } | |
2378 | } | |
2379 | ||
2380 | /************************************************************************** | |
2381 | * | |
2382 | * Device reset and suspend | |
2383 | * | |
2384 | **************************************************************************/ | |
2385 | ||
2386 | /* Tears down the entire software state and most of the hardware state | |
2387 | * before reset. */ | |
2388 | void ef4_reset_down(struct ef4_nic *efx, enum reset_type method) | |
2389 | { | |
2390 | EF4_ASSERT_RESET_SERIALISED(efx); | |
2391 | ||
2392 | ef4_stop_all(efx); | |
2393 | ef4_disable_interrupts(efx); | |
2394 | ||
2395 | mutex_lock(&efx->mac_lock); | |
2396 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && | |
2397 | method != RESET_TYPE_DATAPATH) | |
2398 | efx->phy_op->fini(efx); | |
2399 | efx->type->fini(efx); | |
2400 | } | |
2401 | ||
2402 | /* This function will always ensure that the locks acquired in | |
2403 | * ef4_reset_down() are released. A failure return code indicates | |
2404 | * that we were unable to reinitialise the hardware, and the | |
2405 | * driver should be disabled. If ok is false, then the rx and tx | |
2406 | * engines are not restarted, pending a RESET_DISABLE. */ | |
2407 | int ef4_reset_up(struct ef4_nic *efx, enum reset_type method, bool ok) | |
2408 | { | |
2409 | int rc; | |
2410 | ||
2411 | EF4_ASSERT_RESET_SERIALISED(efx); | |
2412 | ||
2413 | /* Ensure that SRAM is initialised even if we're disabling the device */ | |
2414 | rc = efx->type->init(efx); | |
2415 | if (rc) { | |
2416 | netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); | |
2417 | goto fail; | |
2418 | } | |
2419 | ||
2420 | if (!ok) | |
2421 | goto fail; | |
2422 | ||
2423 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE && | |
2424 | method != RESET_TYPE_DATAPATH) { | |
2425 | rc = efx->phy_op->init(efx); | |
2426 | if (rc) | |
2427 | goto fail; | |
2428 | rc = efx->phy_op->reconfigure(efx); | |
2429 | if (rc && rc != -EPERM) | |
2430 | netif_err(efx, drv, efx->net_dev, | |
2431 | "could not restore PHY settings\n"); | |
2432 | } | |
2433 | ||
2434 | rc = ef4_enable_interrupts(efx); | |
2435 | if (rc) | |
2436 | goto fail; | |
2437 | ||
2438 | down_read(&efx->filter_sem); | |
2439 | ef4_restore_filters(efx); | |
2440 | up_read(&efx->filter_sem); | |
2441 | ||
2442 | mutex_unlock(&efx->mac_lock); | |
2443 | ||
2444 | ef4_start_all(efx); | |
2445 | ||
2446 | return 0; | |
2447 | ||
2448 | fail: | |
2449 | efx->port_initialized = false; | |
2450 | ||
2451 | mutex_unlock(&efx->mac_lock); | |
2452 | ||
2453 | return rc; | |
2454 | } | |
2455 | ||
2456 | /* Reset the NIC using the specified method. Note that the reset may | |
2457 | * fail, in which case the card will be left in an unusable state. | |
2458 | * | |
2459 | * Caller must hold the rtnl_lock. | |
2460 | */ | |
2461 | int ef4_reset(struct ef4_nic *efx, enum reset_type method) | |
2462 | { | |
2463 | int rc, rc2; | |
2464 | bool disabled; | |
2465 | ||
2466 | netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", | |
2467 | RESET_TYPE(method)); | |
2468 | ||
2469 | ef4_device_detach_sync(efx); | |
2470 | ef4_reset_down(efx, method); | |
2471 | ||
2472 | rc = efx->type->reset(efx, method); | |
2473 | if (rc) { | |
2474 | netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); | |
2475 | goto out; | |
2476 | } | |
2477 | ||
2478 | /* Clear flags for the scopes we covered. We assume the NIC and | |
2479 | * driver are now quiescent so that there is no race here. | |
2480 | */ | |
2481 | if (method < RESET_TYPE_MAX_METHOD) | |
2482 | efx->reset_pending &= -(1 << (method + 1)); | |
2483 | else /* it doesn't fit into the well-ordered scope hierarchy */ | |
2484 | __clear_bit(method, &efx->reset_pending); | |
2485 | ||
2486 | /* Reinitialise bus-mastering, which may have been turned off before | |
2487 | * the reset was scheduled. This is still appropriate, even in the | |
2488 | * RESET_TYPE_DISABLE since this driver generally assumes the hardware | |
2489 | * can respond to requests. */ | |
2490 | pci_set_master(efx->pci_dev); | |
2491 | ||
2492 | out: | |
2493 | /* Leave device stopped if necessary */ | |
2494 | disabled = rc || | |
2495 | method == RESET_TYPE_DISABLE || | |
2496 | method == RESET_TYPE_RECOVER_OR_DISABLE; | |
2497 | rc2 = ef4_reset_up(efx, method, !disabled); | |
2498 | if (rc2) { | |
2499 | disabled = true; | |
2500 | if (!rc) | |
2501 | rc = rc2; | |
2502 | } | |
2503 | ||
2504 | if (disabled) { | |
2505 | dev_close(efx->net_dev); | |
2506 | netif_err(efx, drv, efx->net_dev, "has been disabled\n"); | |
2507 | efx->state = STATE_DISABLED; | |
2508 | } else { | |
2509 | netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); | |
2510 | netif_device_attach(efx->net_dev); | |
2511 | } | |
2512 | return rc; | |
2513 | } | |
2514 | ||
2515 | /* Try recovery mechanisms. | |
2516 | * For now only EEH is supported. | |
2517 | * Returns 0 if the recovery mechanisms are unsuccessful. | |
2518 | * Returns a non-zero value otherwise. | |
2519 | */ | |
2520 | int ef4_try_recovery(struct ef4_nic *efx) | |
2521 | { | |
2522 | #ifdef CONFIG_EEH | |
2523 | /* A PCI error can occur and not be seen by EEH because nothing | |
2524 | * happens on the PCI bus. In this case the driver may fail and | |
2525 | * schedule a 'recover or reset', leading to this recovery handler. | |
2526 | * Manually call the eeh failure check function. | |
2527 | */ | |
2528 | struct eeh_dev *eehdev = pci_dev_to_eeh_dev(efx->pci_dev); | |
2529 | if (eeh_dev_check_failure(eehdev)) { | |
2530 | /* The EEH mechanisms will handle the error and reset the | |
2531 | * device if necessary. | |
2532 | */ | |
2533 | return 1; | |
2534 | } | |
2535 | #endif | |
2536 | return 0; | |
2537 | } | |
2538 | ||
2539 | /* The worker thread exists so that code that cannot sleep can | |
2540 | * schedule a reset for later. | |
2541 | */ | |
2542 | static void ef4_reset_work(struct work_struct *data) | |
2543 | { | |
2544 | struct ef4_nic *efx = container_of(data, struct ef4_nic, reset_work); | |
2545 | unsigned long pending; | |
2546 | enum reset_type method; | |
2547 | ||
6aa7de05 | 2548 | pending = READ_ONCE(efx->reset_pending); |
5a6681e2 EC |
2549 | method = fls(pending) - 1; |
2550 | ||
2551 | if ((method == RESET_TYPE_RECOVER_OR_DISABLE || | |
2552 | method == RESET_TYPE_RECOVER_OR_ALL) && | |
2553 | ef4_try_recovery(efx)) | |
2554 | return; | |
2555 | ||
2556 | if (!pending) | |
2557 | return; | |
2558 | ||
2559 | rtnl_lock(); | |
2560 | ||
2561 | /* We checked the state in ef4_schedule_reset() but it may | |
2562 | * have changed by now. Now that we have the RTNL lock, | |
2563 | * it cannot change again. | |
2564 | */ | |
2565 | if (efx->state == STATE_READY) | |
2566 | (void)ef4_reset(efx, method); | |
2567 | ||
2568 | rtnl_unlock(); | |
2569 | } | |
2570 | ||
2571 | void ef4_schedule_reset(struct ef4_nic *efx, enum reset_type type) | |
2572 | { | |
2573 | enum reset_type method; | |
2574 | ||
2575 | if (efx->state == STATE_RECOVERY) { | |
2576 | netif_dbg(efx, drv, efx->net_dev, | |
2577 | "recovering: skip scheduling %s reset\n", | |
2578 | RESET_TYPE(type)); | |
2579 | return; | |
2580 | } | |
2581 | ||
2582 | switch (type) { | |
2583 | case RESET_TYPE_INVISIBLE: | |
2584 | case RESET_TYPE_ALL: | |
2585 | case RESET_TYPE_RECOVER_OR_ALL: | |
2586 | case RESET_TYPE_WORLD: | |
2587 | case RESET_TYPE_DISABLE: | |
2588 | case RESET_TYPE_RECOVER_OR_DISABLE: | |
2589 | case RESET_TYPE_DATAPATH: | |
2590 | method = type; | |
2591 | netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", | |
2592 | RESET_TYPE(method)); | |
2593 | break; | |
2594 | default: | |
2595 | method = efx->type->map_reset_reason(type); | |
2596 | netif_dbg(efx, drv, efx->net_dev, | |
2597 | "scheduling %s reset for %s\n", | |
2598 | RESET_TYPE(method), RESET_TYPE(type)); | |
2599 | break; | |
2600 | } | |
2601 | ||
2602 | set_bit(method, &efx->reset_pending); | |
2603 | smp_mb(); /* ensure we change reset_pending before checking state */ | |
2604 | ||
2605 | /* If we're not READY then just leave the flags set as the cue | |
2606 | * to abort probing or reschedule the reset later. | |
2607 | */ | |
6aa7de05 | 2608 | if (READ_ONCE(efx->state) != STATE_READY) |
5a6681e2 EC |
2609 | return; |
2610 | ||
2611 | queue_work(reset_workqueue, &efx->reset_work); | |
2612 | } | |
2613 | ||
2614 | /************************************************************************** | |
2615 | * | |
2616 | * List of NICs we support | |
2617 | * | |
2618 | **************************************************************************/ | |
2619 | ||
2620 | /* PCI device ID table */ | |
2621 | static const struct pci_device_id ef4_pci_table[] = { | |
2622 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, | |
2623 | PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0), | |
2624 | .driver_data = (unsigned long) &falcon_a1_nic_type}, | |
2625 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, | |
2626 | PCI_DEVICE_ID_SOLARFLARE_SFC4000B), | |
2627 | .driver_data = (unsigned long) &falcon_b0_nic_type}, | |
2628 | {0} /* end of list */ | |
2629 | }; | |
2630 | ||
2631 | /************************************************************************** | |
2632 | * | |
2633 | * Dummy PHY/MAC operations | |
2634 | * | |
2635 | * Can be used for some unimplemented operations | |
2636 | * Needed so all function pointers are valid and do not have to be tested | |
2637 | * before use | |
2638 | * | |
2639 | **************************************************************************/ | |
2640 | int ef4_port_dummy_op_int(struct ef4_nic *efx) | |
2641 | { | |
2642 | return 0; | |
2643 | } | |
2644 | void ef4_port_dummy_op_void(struct ef4_nic *efx) {} | |
2645 | ||
2646 | static bool ef4_port_dummy_op_poll(struct ef4_nic *efx) | |
2647 | { | |
2648 | return false; | |
2649 | } | |
2650 | ||
2651 | static const struct ef4_phy_operations ef4_dummy_phy_operations = { | |
2652 | .init = ef4_port_dummy_op_int, | |
2653 | .reconfigure = ef4_port_dummy_op_int, | |
2654 | .poll = ef4_port_dummy_op_poll, | |
2655 | .fini = ef4_port_dummy_op_void, | |
2656 | }; | |
2657 | ||
2658 | /************************************************************************** | |
2659 | * | |
2660 | * Data housekeeping | |
2661 | * | |
2662 | **************************************************************************/ | |
2663 | ||
2664 | /* This zeroes out and then fills in the invariants in a struct | |
2665 | * ef4_nic (including all sub-structures). | |
2666 | */ | |
2667 | static int ef4_init_struct(struct ef4_nic *efx, | |
2668 | struct pci_dev *pci_dev, struct net_device *net_dev) | |
2669 | { | |
2670 | int i; | |
2671 | ||
2672 | /* Initialise common structures */ | |
2673 | INIT_LIST_HEAD(&efx->node); | |
2674 | INIT_LIST_HEAD(&efx->secondary_list); | |
2675 | spin_lock_init(&efx->biu_lock); | |
2676 | #ifdef CONFIG_SFC_FALCON_MTD | |
2677 | INIT_LIST_HEAD(&efx->mtd_list); | |
2678 | #endif | |
2679 | INIT_WORK(&efx->reset_work, ef4_reset_work); | |
2680 | INIT_DELAYED_WORK(&efx->monitor_work, ef4_monitor); | |
2681 | INIT_DELAYED_WORK(&efx->selftest_work, ef4_selftest_async_work); | |
2682 | efx->pci_dev = pci_dev; | |
2683 | efx->msg_enable = debug; | |
2684 | efx->state = STATE_UNINIT; | |
2685 | strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); | |
2686 | ||
2687 | efx->net_dev = net_dev; | |
2688 | efx->rx_prefix_size = efx->type->rx_prefix_size; | |
2689 | efx->rx_ip_align = | |
2690 | NET_IP_ALIGN ? (efx->rx_prefix_size + NET_IP_ALIGN) % 4 : 0; | |
2691 | efx->rx_packet_hash_offset = | |
2692 | efx->type->rx_hash_offset - efx->type->rx_prefix_size; | |
2693 | efx->rx_packet_ts_offset = | |
2694 | efx->type->rx_ts_offset - efx->type->rx_prefix_size; | |
2695 | spin_lock_init(&efx->stats_lock); | |
2696 | mutex_init(&efx->mac_lock); | |
2697 | efx->phy_op = &ef4_dummy_phy_operations; | |
2698 | efx->mdio.dev = net_dev; | |
2699 | INIT_WORK(&efx->mac_work, ef4_mac_work); | |
2700 | init_waitqueue_head(&efx->flush_wq); | |
2701 | ||
2702 | for (i = 0; i < EF4_MAX_CHANNELS; i++) { | |
2703 | efx->channel[i] = ef4_alloc_channel(efx, i, NULL); | |
2704 | if (!efx->channel[i]) | |
2705 | goto fail; | |
2706 | efx->msi_context[i].efx = efx; | |
2707 | efx->msi_context[i].index = i; | |
2708 | } | |
2709 | ||
2710 | /* Higher numbered interrupt modes are less capable! */ | |
2711 | efx->interrupt_mode = max(efx->type->max_interrupt_mode, | |
2712 | interrupt_mode); | |
2713 | ||
2714 | /* Would be good to use the net_dev name, but we're too early */ | |
2715 | snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", | |
2716 | pci_name(pci_dev)); | |
2717 | efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); | |
2718 | if (!efx->workqueue) | |
2719 | goto fail; | |
2720 | ||
2721 | return 0; | |
2722 | ||
2723 | fail: | |
2724 | ef4_fini_struct(efx); | |
2725 | return -ENOMEM; | |
2726 | } | |
2727 | ||
2728 | static void ef4_fini_struct(struct ef4_nic *efx) | |
2729 | { | |
2730 | int i; | |
2731 | ||
2732 | for (i = 0; i < EF4_MAX_CHANNELS; i++) | |
2733 | kfree(efx->channel[i]); | |
2734 | ||
2735 | kfree(efx->vpd_sn); | |
2736 | ||
2737 | if (efx->workqueue) { | |
2738 | destroy_workqueue(efx->workqueue); | |
2739 | efx->workqueue = NULL; | |
2740 | } | |
2741 | } | |
2742 | ||
2743 | void ef4_update_sw_stats(struct ef4_nic *efx, u64 *stats) | |
2744 | { | |
2745 | u64 n_rx_nodesc_trunc = 0; | |
2746 | struct ef4_channel *channel; | |
2747 | ||
2748 | ef4_for_each_channel(channel, efx) | |
2749 | n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc; | |
2750 | stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc; | |
2751 | stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops); | |
2752 | } | |
2753 | ||
2754 | /************************************************************************** | |
2755 | * | |
2756 | * PCI interface | |
2757 | * | |
2758 | **************************************************************************/ | |
2759 | ||
2760 | /* Main body of final NIC shutdown code | |
2761 | * This is called only at module unload (or hotplug removal). | |
2762 | */ | |
2763 | static void ef4_pci_remove_main(struct ef4_nic *efx) | |
2764 | { | |
2765 | /* Flush reset_work. It can no longer be scheduled since we | |
2766 | * are not READY. | |
2767 | */ | |
2768 | BUG_ON(efx->state == STATE_READY); | |
2769 | cancel_work_sync(&efx->reset_work); | |
2770 | ||
2771 | ef4_disable_interrupts(efx); | |
2772 | ef4_nic_fini_interrupt(efx); | |
2773 | ef4_fini_port(efx); | |
2774 | efx->type->fini(efx); | |
2775 | ef4_fini_napi(efx); | |
2776 | ef4_remove_all(efx); | |
2777 | } | |
2778 | ||
2779 | /* Final NIC shutdown | |
2780 | * This is called only at module unload (or hotplug removal). A PF can call | |
2781 | * this on its VFs to ensure they are unbound first. | |
2782 | */ | |
2783 | static void ef4_pci_remove(struct pci_dev *pci_dev) | |
2784 | { | |
2785 | struct ef4_nic *efx; | |
2786 | ||
2787 | efx = pci_get_drvdata(pci_dev); | |
2788 | if (!efx) | |
2789 | return; | |
2790 | ||
2791 | /* Mark the NIC as fini, then stop the interface */ | |
2792 | rtnl_lock(); | |
2793 | ef4_dissociate(efx); | |
2794 | dev_close(efx->net_dev); | |
2795 | ef4_disable_interrupts(efx); | |
2796 | efx->state = STATE_UNINIT; | |
2797 | rtnl_unlock(); | |
2798 | ||
2799 | ef4_unregister_netdev(efx); | |
2800 | ||
2801 | ef4_mtd_remove(efx); | |
2802 | ||
2803 | ef4_pci_remove_main(efx); | |
2804 | ||
2805 | ef4_fini_io(efx); | |
2806 | netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); | |
2807 | ||
2808 | ef4_fini_struct(efx); | |
2809 | free_netdev(efx->net_dev); | |
2810 | ||
2811 | pci_disable_pcie_error_reporting(pci_dev); | |
2812 | }; | |
2813 | ||
2814 | /* NIC VPD information | |
2815 | * Called during probe to display the part number of the | |
2816 | * installed NIC. VPD is potentially very large but this should | |
2817 | * always appear within the first 512 bytes. | |
2818 | */ | |
2819 | #define SFC_VPD_LEN 512 | |
2820 | static void ef4_probe_vpd_strings(struct ef4_nic *efx) | |
2821 | { | |
2822 | struct pci_dev *dev = efx->pci_dev; | |
2823 | char vpd_data[SFC_VPD_LEN]; | |
2824 | ssize_t vpd_size; | |
2825 | int ro_start, ro_size, i, j; | |
2826 | ||
2827 | /* Get the vpd data from the device */ | |
2828 | vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); | |
2829 | if (vpd_size <= 0) { | |
2830 | netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); | |
2831 | return; | |
2832 | } | |
2833 | ||
2834 | /* Get the Read only section */ | |
2835 | ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); | |
2836 | if (ro_start < 0) { | |
2837 | netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); | |
2838 | return; | |
2839 | } | |
2840 | ||
2841 | ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]); | |
2842 | j = ro_size; | |
2843 | i = ro_start + PCI_VPD_LRDT_TAG_SIZE; | |
2844 | if (i + j > vpd_size) | |
2845 | j = vpd_size - i; | |
2846 | ||
2847 | /* Get the Part number */ | |
2848 | i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); | |
2849 | if (i < 0) { | |
2850 | netif_err(efx, drv, efx->net_dev, "Part number not found\n"); | |
2851 | return; | |
2852 | } | |
2853 | ||
2854 | j = pci_vpd_info_field_size(&vpd_data[i]); | |
2855 | i += PCI_VPD_INFO_FLD_HDR_SIZE; | |
2856 | if (i + j > vpd_size) { | |
2857 | netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); | |
2858 | return; | |
2859 | } | |
2860 | ||
2861 | netif_info(efx, drv, efx->net_dev, | |
2862 | "Part Number : %.*s\n", j, &vpd_data[i]); | |
2863 | ||
2864 | i = ro_start + PCI_VPD_LRDT_TAG_SIZE; | |
2865 | j = ro_size; | |
2866 | i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN"); | |
2867 | if (i < 0) { | |
2868 | netif_err(efx, drv, efx->net_dev, "Serial number not found\n"); | |
2869 | return; | |
2870 | } | |
2871 | ||
2872 | j = pci_vpd_info_field_size(&vpd_data[i]); | |
2873 | i += PCI_VPD_INFO_FLD_HDR_SIZE; | |
2874 | if (i + j > vpd_size) { | |
2875 | netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n"); | |
2876 | return; | |
2877 | } | |
2878 | ||
2879 | efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL); | |
2880 | if (!efx->vpd_sn) | |
2881 | return; | |
2882 | ||
2883 | snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]); | |
2884 | } | |
2885 | ||
2886 | ||
2887 | /* Main body of NIC initialisation | |
2888 | * This is called at module load (or hotplug insertion, theoretically). | |
2889 | */ | |
2890 | static int ef4_pci_probe_main(struct ef4_nic *efx) | |
2891 | { | |
2892 | int rc; | |
2893 | ||
2894 | /* Do start-of-day initialisation */ | |
2895 | rc = ef4_probe_all(efx); | |
2896 | if (rc) | |
2897 | goto fail1; | |
2898 | ||
2899 | ef4_init_napi(efx); | |
2900 | ||
2901 | rc = efx->type->init(efx); | |
2902 | if (rc) { | |
2903 | netif_err(efx, probe, efx->net_dev, | |
2904 | "failed to initialise NIC\n"); | |
2905 | goto fail3; | |
2906 | } | |
2907 | ||
2908 | rc = ef4_init_port(efx); | |
2909 | if (rc) { | |
2910 | netif_err(efx, probe, efx->net_dev, | |
2911 | "failed to initialise port\n"); | |
2912 | goto fail4; | |
2913 | } | |
2914 | ||
2915 | rc = ef4_nic_init_interrupt(efx); | |
2916 | if (rc) | |
2917 | goto fail5; | |
2918 | rc = ef4_enable_interrupts(efx); | |
2919 | if (rc) | |
2920 | goto fail6; | |
2921 | ||
2922 | return 0; | |
2923 | ||
2924 | fail6: | |
2925 | ef4_nic_fini_interrupt(efx); | |
2926 | fail5: | |
2927 | ef4_fini_port(efx); | |
2928 | fail4: | |
2929 | efx->type->fini(efx); | |
2930 | fail3: | |
2931 | ef4_fini_napi(efx); | |
2932 | ef4_remove_all(efx); | |
2933 | fail1: | |
2934 | return rc; | |
2935 | } | |
2936 | ||
2937 | /* NIC initialisation | |
2938 | * | |
2939 | * This is called at module load (or hotplug insertion, | |
2940 | * theoretically). It sets up PCI mappings, resets the NIC, | |
2941 | * sets up and registers the network devices with the kernel and hooks | |
2942 | * the interrupt service routine. It does not prepare the device for | |
2943 | * transmission; this is left to the first time one of the network | |
2944 | * interfaces is brought up (i.e. ef4_net_open). | |
2945 | */ | |
2946 | static int ef4_pci_probe(struct pci_dev *pci_dev, | |
2947 | const struct pci_device_id *entry) | |
2948 | { | |
2949 | struct net_device *net_dev; | |
2950 | struct ef4_nic *efx; | |
2951 | int rc; | |
2952 | ||
2953 | /* Allocate and initialise a struct net_device and struct ef4_nic */ | |
2954 | net_dev = alloc_etherdev_mqs(sizeof(*efx), EF4_MAX_CORE_TX_QUEUES, | |
2955 | EF4_MAX_RX_QUEUES); | |
2956 | if (!net_dev) | |
2957 | return -ENOMEM; | |
2958 | efx = netdev_priv(net_dev); | |
2959 | efx->type = (const struct ef4_nic_type *) entry->driver_data; | |
2960 | efx->fixed_features |= NETIF_F_HIGHDMA; | |
2961 | ||
2962 | pci_set_drvdata(pci_dev, efx); | |
2963 | SET_NETDEV_DEV(net_dev, &pci_dev->dev); | |
2964 | rc = ef4_init_struct(efx, pci_dev, net_dev); | |
2965 | if (rc) | |
2966 | goto fail1; | |
2967 | ||
2968 | netif_info(efx, probe, efx->net_dev, | |
2969 | "Solarflare NIC detected\n"); | |
2970 | ||
2971 | ef4_probe_vpd_strings(efx); | |
2972 | ||
2973 | /* Set up basic I/O (BAR mappings etc) */ | |
2974 | rc = ef4_init_io(efx); | |
2975 | if (rc) | |
2976 | goto fail2; | |
2977 | ||
2978 | rc = ef4_pci_probe_main(efx); | |
2979 | if (rc) | |
2980 | goto fail3; | |
2981 | ||
2982 | net_dev->features |= (efx->type->offload_features | NETIF_F_SG | | |
2983 | NETIF_F_RXCSUM); | |
2984 | /* Mask for features that also apply to VLAN devices */ | |
2985 | net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG | | |
2986 | NETIF_F_HIGHDMA | NETIF_F_RXCSUM); | |
2987 | ||
2988 | net_dev->hw_features = net_dev->features & ~efx->fixed_features; | |
2989 | ||
2990 | /* Disable VLAN filtering by default. It may be enforced if | |
2991 | * the feature is fixed (i.e. VLAN filters are required to | |
2992 | * receive VLAN tagged packets due to vPort restrictions). | |
2993 | */ | |
2994 | net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; | |
2995 | net_dev->features |= efx->fixed_features; | |
2996 | ||
2997 | rc = ef4_register_netdev(efx); | |
2998 | if (rc) | |
2999 | goto fail4; | |
3000 | ||
3001 | netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); | |
3002 | ||
3003 | /* Try to create MTDs, but allow this to fail */ | |
3004 | rtnl_lock(); | |
3005 | rc = ef4_mtd_probe(efx); | |
3006 | rtnl_unlock(); | |
3007 | if (rc && rc != -EPERM) | |
3008 | netif_warn(efx, probe, efx->net_dev, | |
3009 | "failed to create MTDs (%d)\n", rc); | |
3010 | ||
3011 | rc = pci_enable_pcie_error_reporting(pci_dev); | |
3012 | if (rc && rc != -EINVAL) | |
3013 | netif_notice(efx, probe, efx->net_dev, | |
3014 | "PCIE error reporting unavailable (%d).\n", | |
3015 | rc); | |
3016 | ||
3017 | return 0; | |
3018 | ||
3019 | fail4: | |
3020 | ef4_pci_remove_main(efx); | |
3021 | fail3: | |
3022 | ef4_fini_io(efx); | |
3023 | fail2: | |
3024 | ef4_fini_struct(efx); | |
3025 | fail1: | |
3026 | WARN_ON(rc > 0); | |
3027 | netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); | |
3028 | free_netdev(net_dev); | |
3029 | return rc; | |
3030 | } | |
3031 | ||
3032 | static int ef4_pm_freeze(struct device *dev) | |
3033 | { | |
3034 | struct ef4_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
3035 | ||
3036 | rtnl_lock(); | |
3037 | ||
3038 | if (efx->state != STATE_DISABLED) { | |
3039 | efx->state = STATE_UNINIT; | |
3040 | ||
3041 | ef4_device_detach_sync(efx); | |
3042 | ||
3043 | ef4_stop_all(efx); | |
3044 | ef4_disable_interrupts(efx); | |
3045 | } | |
3046 | ||
3047 | rtnl_unlock(); | |
3048 | ||
3049 | return 0; | |
3050 | } | |
3051 | ||
3052 | static int ef4_pm_thaw(struct device *dev) | |
3053 | { | |
3054 | int rc; | |
3055 | struct ef4_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
3056 | ||
3057 | rtnl_lock(); | |
3058 | ||
3059 | if (efx->state != STATE_DISABLED) { | |
3060 | rc = ef4_enable_interrupts(efx); | |
3061 | if (rc) | |
3062 | goto fail; | |
3063 | ||
3064 | mutex_lock(&efx->mac_lock); | |
3065 | efx->phy_op->reconfigure(efx); | |
3066 | mutex_unlock(&efx->mac_lock); | |
3067 | ||
3068 | ef4_start_all(efx); | |
3069 | ||
3070 | netif_device_attach(efx->net_dev); | |
3071 | ||
3072 | efx->state = STATE_READY; | |
3073 | ||
3074 | efx->type->resume_wol(efx); | |
3075 | } | |
3076 | ||
3077 | rtnl_unlock(); | |
3078 | ||
3079 | /* Reschedule any quenched resets scheduled during ef4_pm_freeze() */ | |
3080 | queue_work(reset_workqueue, &efx->reset_work); | |
3081 | ||
3082 | return 0; | |
3083 | ||
3084 | fail: | |
3085 | rtnl_unlock(); | |
3086 | ||
3087 | return rc; | |
3088 | } | |
3089 | ||
3090 | static int ef4_pm_poweroff(struct device *dev) | |
3091 | { | |
3092 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
3093 | struct ef4_nic *efx = pci_get_drvdata(pci_dev); | |
3094 | ||
3095 | efx->type->fini(efx); | |
3096 | ||
3097 | efx->reset_pending = 0; | |
3098 | ||
3099 | pci_save_state(pci_dev); | |
3100 | return pci_set_power_state(pci_dev, PCI_D3hot); | |
3101 | } | |
3102 | ||
3103 | /* Used for both resume and restore */ | |
3104 | static int ef4_pm_resume(struct device *dev) | |
3105 | { | |
3106 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
3107 | struct ef4_nic *efx = pci_get_drvdata(pci_dev); | |
3108 | int rc; | |
3109 | ||
3110 | rc = pci_set_power_state(pci_dev, PCI_D0); | |
3111 | if (rc) | |
3112 | return rc; | |
3113 | pci_restore_state(pci_dev); | |
3114 | rc = pci_enable_device(pci_dev); | |
3115 | if (rc) | |
3116 | return rc; | |
3117 | pci_set_master(efx->pci_dev); | |
3118 | rc = efx->type->reset(efx, RESET_TYPE_ALL); | |
3119 | if (rc) | |
3120 | return rc; | |
3121 | rc = efx->type->init(efx); | |
3122 | if (rc) | |
3123 | return rc; | |
3124 | rc = ef4_pm_thaw(dev); | |
3125 | return rc; | |
3126 | } | |
3127 | ||
3128 | static int ef4_pm_suspend(struct device *dev) | |
3129 | { | |
3130 | int rc; | |
3131 | ||
3132 | ef4_pm_freeze(dev); | |
3133 | rc = ef4_pm_poweroff(dev); | |
3134 | if (rc) | |
3135 | ef4_pm_resume(dev); | |
3136 | return rc; | |
3137 | } | |
3138 | ||
3139 | static const struct dev_pm_ops ef4_pm_ops = { | |
3140 | .suspend = ef4_pm_suspend, | |
3141 | .resume = ef4_pm_resume, | |
3142 | .freeze = ef4_pm_freeze, | |
3143 | .thaw = ef4_pm_thaw, | |
3144 | .poweroff = ef4_pm_poweroff, | |
3145 | .restore = ef4_pm_resume, | |
3146 | }; | |
3147 | ||
3148 | /* A PCI error affecting this device was detected. | |
3149 | * At this point MMIO and DMA may be disabled. | |
3150 | * Stop the software path and request a slot reset. | |
3151 | */ | |
3152 | static pci_ers_result_t ef4_io_error_detected(struct pci_dev *pdev, | |
3153 | enum pci_channel_state state) | |
3154 | { | |
3155 | pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; | |
3156 | struct ef4_nic *efx = pci_get_drvdata(pdev); | |
3157 | ||
3158 | if (state == pci_channel_io_perm_failure) | |
3159 | return PCI_ERS_RESULT_DISCONNECT; | |
3160 | ||
3161 | rtnl_lock(); | |
3162 | ||
3163 | if (efx->state != STATE_DISABLED) { | |
3164 | efx->state = STATE_RECOVERY; | |
3165 | efx->reset_pending = 0; | |
3166 | ||
3167 | ef4_device_detach_sync(efx); | |
3168 | ||
3169 | ef4_stop_all(efx); | |
3170 | ef4_disable_interrupts(efx); | |
3171 | ||
3172 | status = PCI_ERS_RESULT_NEED_RESET; | |
3173 | } else { | |
3174 | /* If the interface is disabled we don't want to do anything | |
3175 | * with it. | |
3176 | */ | |
3177 | status = PCI_ERS_RESULT_RECOVERED; | |
3178 | } | |
3179 | ||
3180 | rtnl_unlock(); | |
3181 | ||
3182 | pci_disable_device(pdev); | |
3183 | ||
3184 | return status; | |
3185 | } | |
3186 | ||
3187 | /* Fake a successful reset, which will be performed later in ef4_io_resume. */ | |
3188 | static pci_ers_result_t ef4_io_slot_reset(struct pci_dev *pdev) | |
3189 | { | |
3190 | struct ef4_nic *efx = pci_get_drvdata(pdev); | |
3191 | pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; | |
3192 | int rc; | |
3193 | ||
3194 | if (pci_enable_device(pdev)) { | |
3195 | netif_err(efx, hw, efx->net_dev, | |
3196 | "Cannot re-enable PCI device after reset.\n"); | |
3197 | status = PCI_ERS_RESULT_DISCONNECT; | |
3198 | } | |
3199 | ||
3200 | rc = pci_cleanup_aer_uncorrect_error_status(pdev); | |
3201 | if (rc) { | |
3202 | netif_err(efx, hw, efx->net_dev, | |
3203 | "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc); | |
3204 | /* Non-fatal error. Continue. */ | |
3205 | } | |
3206 | ||
3207 | return status; | |
3208 | } | |
3209 | ||
3210 | /* Perform the actual reset and resume I/O operations. */ | |
3211 | static void ef4_io_resume(struct pci_dev *pdev) | |
3212 | { | |
3213 | struct ef4_nic *efx = pci_get_drvdata(pdev); | |
3214 | int rc; | |
3215 | ||
3216 | rtnl_lock(); | |
3217 | ||
3218 | if (efx->state == STATE_DISABLED) | |
3219 | goto out; | |
3220 | ||
3221 | rc = ef4_reset(efx, RESET_TYPE_ALL); | |
3222 | if (rc) { | |
3223 | netif_err(efx, hw, efx->net_dev, | |
3224 | "ef4_reset failed after PCI error (%d)\n", rc); | |
3225 | } else { | |
3226 | efx->state = STATE_READY; | |
3227 | netif_dbg(efx, hw, efx->net_dev, | |
3228 | "Done resetting and resuming IO after PCI error.\n"); | |
3229 | } | |
3230 | ||
3231 | out: | |
3232 | rtnl_unlock(); | |
3233 | } | |
3234 | ||
3235 | /* For simplicity and reliability, we always require a slot reset and try to | |
3236 | * reset the hardware when a pci error affecting the device is detected. | |
3237 | * We leave both the link_reset and mmio_enabled callback unimplemented: | |
3238 | * with our request for slot reset the mmio_enabled callback will never be | |
3239 | * called, and the link_reset callback is not used by AER or EEH mechanisms. | |
3240 | */ | |
3241 | static const struct pci_error_handlers ef4_err_handlers = { | |
3242 | .error_detected = ef4_io_error_detected, | |
3243 | .slot_reset = ef4_io_slot_reset, | |
3244 | .resume = ef4_io_resume, | |
3245 | }; | |
3246 | ||
3247 | static struct pci_driver ef4_pci_driver = { | |
3248 | .name = KBUILD_MODNAME, | |
3249 | .id_table = ef4_pci_table, | |
3250 | .probe = ef4_pci_probe, | |
3251 | .remove = ef4_pci_remove, | |
3252 | .driver.pm = &ef4_pm_ops, | |
3253 | .err_handler = &ef4_err_handlers, | |
3254 | }; | |
3255 | ||
3256 | /************************************************************************** | |
3257 | * | |
3258 | * Kernel module interface | |
3259 | * | |
3260 | *************************************************************************/ | |
3261 | ||
3262 | module_param(interrupt_mode, uint, 0444); | |
3263 | MODULE_PARM_DESC(interrupt_mode, | |
3264 | "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); | |
3265 | ||
3266 | static int __init ef4_init_module(void) | |
3267 | { | |
3268 | int rc; | |
3269 | ||
3270 | printk(KERN_INFO "Solarflare Falcon driver v" EF4_DRIVER_VERSION "\n"); | |
3271 | ||
3272 | rc = register_netdevice_notifier(&ef4_netdev_notifier); | |
3273 | if (rc) | |
3274 | goto err_notifier; | |
3275 | ||
3276 | reset_workqueue = create_singlethread_workqueue("sfc_reset"); | |
3277 | if (!reset_workqueue) { | |
3278 | rc = -ENOMEM; | |
3279 | goto err_reset; | |
3280 | } | |
3281 | ||
3282 | rc = pci_register_driver(&ef4_pci_driver); | |
3283 | if (rc < 0) | |
3284 | goto err_pci; | |
3285 | ||
3286 | return 0; | |
3287 | ||
3288 | err_pci: | |
3289 | destroy_workqueue(reset_workqueue); | |
3290 | err_reset: | |
3291 | unregister_netdevice_notifier(&ef4_netdev_notifier); | |
3292 | err_notifier: | |
3293 | return rc; | |
3294 | } | |
3295 | ||
3296 | static void __exit ef4_exit_module(void) | |
3297 | { | |
3298 | printk(KERN_INFO "Solarflare Falcon driver unloading\n"); | |
3299 | ||
3300 | pci_unregister_driver(&ef4_pci_driver); | |
3301 | destroy_workqueue(reset_workqueue); | |
3302 | unregister_netdevice_notifier(&ef4_netdev_notifier); | |
3303 | ||
3304 | } | |
3305 | ||
3306 | module_init(ef4_init_module); | |
3307 | module_exit(ef4_exit_module); | |
3308 | ||
3309 | MODULE_AUTHOR("Solarflare Communications and " | |
3310 | "Michael Brown <mbrown@fensystems.co.uk>"); | |
3311 | MODULE_DESCRIPTION("Solarflare Falcon network driver"); | |
3312 | MODULE_LICENSE("GPL"); | |
3313 | MODULE_DEVICE_TABLE(pci, ef4_pci_table); | |
e7072f66 | 3314 | MODULE_VERSION(EF4_DRIVER_VERSION); |