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8ceee660 BH |
1 | /**************************************************************************** |
2 | * Driver for Solarflare Solarstorm network controllers and boards | |
3 | * Copyright 2005-2006 Fen Systems Ltd. | |
906bb26c | 4 | * Copyright 2005-2009 Solarflare Communications Inc. |
8ceee660 BH |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License version 2 as published | |
8 | * by the Free Software Foundation, incorporated herein by reference. | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/pci.h> | |
13 | #include <linux/netdevice.h> | |
14 | #include <linux/etherdevice.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/notifier.h> | |
17 | #include <linux/ip.h> | |
18 | #include <linux/tcp.h> | |
19 | #include <linux/in.h> | |
20 | #include <linux/crc32.h> | |
21 | #include <linux/ethtool.h> | |
aa6ef27e | 22 | #include <linux/topology.h> |
5a0e3ad6 | 23 | #include <linux/gfp.h> |
8ceee660 | 24 | #include "net_driver.h" |
8ceee660 BH |
25 | #include "efx.h" |
26 | #include "mdio_10g.h" | |
744093c9 | 27 | #include "nic.h" |
8ceee660 | 28 | |
8880f4ec BH |
29 | #include "mcdi.h" |
30 | ||
c459302d BH |
31 | /************************************************************************** |
32 | * | |
33 | * Type name strings | |
34 | * | |
35 | ************************************************************************** | |
36 | */ | |
37 | ||
38 | /* Loopback mode names (see LOOPBACK_MODE()) */ | |
39 | const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; | |
40 | const char *efx_loopback_mode_names[] = { | |
41 | [LOOPBACK_NONE] = "NONE", | |
e58f69f4 | 42 | [LOOPBACK_DATA] = "DATAPATH", |
c459302d BH |
43 | [LOOPBACK_GMAC] = "GMAC", |
44 | [LOOPBACK_XGMII] = "XGMII", | |
45 | [LOOPBACK_XGXS] = "XGXS", | |
46 | [LOOPBACK_XAUI] = "XAUI", | |
e58f69f4 BH |
47 | [LOOPBACK_GMII] = "GMII", |
48 | [LOOPBACK_SGMII] = "SGMII", | |
49 | [LOOPBACK_XGBR] = "XGBR", | |
50 | [LOOPBACK_XFI] = "XFI", | |
51 | [LOOPBACK_XAUI_FAR] = "XAUI_FAR", | |
52 | [LOOPBACK_GMII_FAR] = "GMII_FAR", | |
53 | [LOOPBACK_SGMII_FAR] = "SGMII_FAR", | |
54 | [LOOPBACK_XFI_FAR] = "XFI_FAR", | |
c459302d BH |
55 | [LOOPBACK_GPHY] = "GPHY", |
56 | [LOOPBACK_PHYXS] = "PHYXS", | |
57 | [LOOPBACK_PCS] = "PCS", | |
58 | [LOOPBACK_PMAPMD] = "PMA/PMD", | |
e58f69f4 BH |
59 | [LOOPBACK_XPORT] = "XPORT", |
60 | [LOOPBACK_XGMII_WS] = "XGMII_WS", | |
61 | [LOOPBACK_XAUI_WS] = "XAUI_WS", | |
62 | [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", | |
63 | [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", | |
64 | [LOOPBACK_GMII_WS] = "GMII_WS", | |
65 | [LOOPBACK_XFI_WS] = "XFI_WS", | |
66 | [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", | |
67 | [LOOPBACK_PHYXS_WS] = "PHYXS_WS", | |
c459302d BH |
68 | }; |
69 | ||
70 | /* Interrupt mode names (see INT_MODE())) */ | |
71 | const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX; | |
72 | const char *efx_interrupt_mode_names[] = { | |
73 | [EFX_INT_MODE_MSIX] = "MSI-X", | |
74 | [EFX_INT_MODE_MSI] = "MSI", | |
75 | [EFX_INT_MODE_LEGACY] = "legacy", | |
76 | }; | |
77 | ||
78 | const unsigned int efx_reset_type_max = RESET_TYPE_MAX; | |
79 | const char *efx_reset_type_names[] = { | |
80 | [RESET_TYPE_INVISIBLE] = "INVISIBLE", | |
81 | [RESET_TYPE_ALL] = "ALL", | |
82 | [RESET_TYPE_WORLD] = "WORLD", | |
83 | [RESET_TYPE_DISABLE] = "DISABLE", | |
84 | [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", | |
85 | [RESET_TYPE_INT_ERROR] = "INT_ERROR", | |
86 | [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY", | |
87 | [RESET_TYPE_RX_DESC_FETCH] = "RX_DESC_FETCH", | |
88 | [RESET_TYPE_TX_DESC_FETCH] = "TX_DESC_FETCH", | |
89 | [RESET_TYPE_TX_SKIP] = "TX_SKIP", | |
8880f4ec | 90 | [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", |
c459302d BH |
91 | }; |
92 | ||
8ceee660 BH |
93 | #define EFX_MAX_MTU (9 * 1024) |
94 | ||
95 | /* RX slow fill workqueue. If memory allocation fails in the fast path, | |
96 | * a work item is pushed onto this work queue to retry the allocation later, | |
97 | * to avoid the NIC being starved of RX buffers. Since this is a per cpu | |
98 | * workqueue, there is nothing to be gained in making it per NIC | |
99 | */ | |
100 | static struct workqueue_struct *refill_workqueue; | |
101 | ||
1ab00629 SH |
102 | /* Reset workqueue. If any NIC has a hardware failure then a reset will be |
103 | * queued onto this work queue. This is not a per-nic work queue, because | |
104 | * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. | |
105 | */ | |
106 | static struct workqueue_struct *reset_workqueue; | |
107 | ||
8ceee660 BH |
108 | /************************************************************************** |
109 | * | |
110 | * Configurable values | |
111 | * | |
112 | *************************************************************************/ | |
113 | ||
8ceee660 BH |
114 | /* |
115 | * Use separate channels for TX and RX events | |
116 | * | |
28b581ab NT |
117 | * Set this to 1 to use separate channels for TX and RX. It allows us |
118 | * to control interrupt affinity separately for TX and RX. | |
8ceee660 | 119 | * |
28b581ab | 120 | * This is only used in MSI-X interrupt mode |
8ceee660 | 121 | */ |
28b581ab NT |
122 | static unsigned int separate_tx_channels; |
123 | module_param(separate_tx_channels, uint, 0644); | |
124 | MODULE_PARM_DESC(separate_tx_channels, | |
125 | "Use separate channels for TX and RX"); | |
8ceee660 BH |
126 | |
127 | /* This is the weight assigned to each of the (per-channel) virtual | |
128 | * NAPI devices. | |
129 | */ | |
130 | static int napi_weight = 64; | |
131 | ||
132 | /* This is the time (in jiffies) between invocations of the hardware | |
133 | * monitor, which checks for known hardware bugs and resets the | |
134 | * hardware and driver as necessary. | |
135 | */ | |
136 | unsigned int efx_monitor_interval = 1 * HZ; | |
137 | ||
8ceee660 BH |
138 | /* This controls whether or not the driver will initialise devices |
139 | * with invalid MAC addresses stored in the EEPROM or flash. If true, | |
140 | * such devices will be initialised with a random locally-generated | |
141 | * MAC address. This allows for loading the sfc_mtd driver to | |
142 | * reprogram the flash, even if the flash contents (including the MAC | |
143 | * address) have previously been erased. | |
144 | */ | |
145 | static unsigned int allow_bad_hwaddr; | |
146 | ||
147 | /* Initial interrupt moderation settings. They can be modified after | |
148 | * module load with ethtool. | |
149 | * | |
150 | * The default for RX should strike a balance between increasing the | |
151 | * round-trip latency and reducing overhead. | |
152 | */ | |
153 | static unsigned int rx_irq_mod_usec = 60; | |
154 | ||
155 | /* Initial interrupt moderation settings. They can be modified after | |
156 | * module load with ethtool. | |
157 | * | |
158 | * This default is chosen to ensure that a 10G link does not go idle | |
159 | * while a TX queue is stopped after it has become full. A queue is | |
160 | * restarted when it drops below half full. The time this takes (assuming | |
161 | * worst case 3 descriptors per packet and 1024 descriptors) is | |
162 | * 512 / 3 * 1.2 = 205 usec. | |
163 | */ | |
164 | static unsigned int tx_irq_mod_usec = 150; | |
165 | ||
166 | /* This is the first interrupt mode to try out of: | |
167 | * 0 => MSI-X | |
168 | * 1 => MSI | |
169 | * 2 => legacy | |
170 | */ | |
171 | static unsigned int interrupt_mode; | |
172 | ||
173 | /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), | |
174 | * i.e. the number of CPUs among which we may distribute simultaneous | |
175 | * interrupt handling. | |
176 | * | |
177 | * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. | |
178 | * The default (0) means to assign an interrupt to each package (level II cache) | |
179 | */ | |
180 | static unsigned int rss_cpus; | |
181 | module_param(rss_cpus, uint, 0444); | |
182 | MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); | |
183 | ||
84ae48fe BH |
184 | static int phy_flash_cfg; |
185 | module_param(phy_flash_cfg, int, 0644); | |
186 | MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); | |
187 | ||
6fb70fd1 BH |
188 | static unsigned irq_adapt_low_thresh = 10000; |
189 | module_param(irq_adapt_low_thresh, uint, 0644); | |
190 | MODULE_PARM_DESC(irq_adapt_low_thresh, | |
191 | "Threshold score for reducing IRQ moderation"); | |
192 | ||
193 | static unsigned irq_adapt_high_thresh = 20000; | |
194 | module_param(irq_adapt_high_thresh, uint, 0644); | |
195 | MODULE_PARM_DESC(irq_adapt_high_thresh, | |
196 | "Threshold score for increasing IRQ moderation"); | |
197 | ||
8ceee660 BH |
198 | /************************************************************************** |
199 | * | |
200 | * Utility functions and prototypes | |
201 | * | |
202 | *************************************************************************/ | |
203 | static void efx_remove_channel(struct efx_channel *channel); | |
204 | static void efx_remove_port(struct efx_nic *efx); | |
205 | static void efx_fini_napi(struct efx_nic *efx); | |
206 | static void efx_fini_channels(struct efx_nic *efx); | |
207 | ||
208 | #define EFX_ASSERT_RESET_SERIALISED(efx) \ | |
209 | do { \ | |
332c1ce9 BH |
210 | if ((efx->state == STATE_RUNNING) || \ |
211 | (efx->state == STATE_DISABLED)) \ | |
8ceee660 BH |
212 | ASSERT_RTNL(); \ |
213 | } while (0) | |
214 | ||
215 | /************************************************************************** | |
216 | * | |
217 | * Event queue processing | |
218 | * | |
219 | *************************************************************************/ | |
220 | ||
221 | /* Process channel's event queue | |
222 | * | |
223 | * This function is responsible for processing the event queue of a | |
224 | * single channel. The caller must guarantee that this function will | |
225 | * never be concurrently called more than once on the same channel, | |
226 | * though different channels may be being processed concurrently. | |
227 | */ | |
4d566063 | 228 | static int efx_process_channel(struct efx_channel *channel, int rx_quota) |
8ceee660 | 229 | { |
42cbe2d7 BH |
230 | struct efx_nic *efx = channel->efx; |
231 | int rx_packets; | |
8ceee660 | 232 | |
42cbe2d7 | 233 | if (unlikely(efx->reset_pending != RESET_TYPE_NONE || |
8ceee660 | 234 | !channel->enabled)) |
42cbe2d7 | 235 | return 0; |
8ceee660 | 236 | |
152b6a62 | 237 | rx_packets = efx_nic_process_eventq(channel, rx_quota); |
42cbe2d7 BH |
238 | if (rx_packets == 0) |
239 | return 0; | |
8ceee660 BH |
240 | |
241 | /* Deliver last RX packet. */ | |
242 | if (channel->rx_pkt) { | |
243 | __efx_rx_packet(channel, channel->rx_pkt, | |
244 | channel->rx_pkt_csummed); | |
245 | channel->rx_pkt = NULL; | |
246 | } | |
247 | ||
8ceee660 BH |
248 | efx_rx_strategy(channel); |
249 | ||
42cbe2d7 | 250 | efx_fast_push_rx_descriptors(&efx->rx_queue[channel->channel]); |
8ceee660 | 251 | |
42cbe2d7 | 252 | return rx_packets; |
8ceee660 BH |
253 | } |
254 | ||
255 | /* Mark channel as finished processing | |
256 | * | |
257 | * Note that since we will not receive further interrupts for this | |
258 | * channel before we finish processing and call the eventq_read_ack() | |
259 | * method, there is no need to use the interrupt hold-off timers. | |
260 | */ | |
261 | static inline void efx_channel_processed(struct efx_channel *channel) | |
262 | { | |
5b9e207c BH |
263 | /* The interrupt handler for this channel may set work_pending |
264 | * as soon as we acknowledge the events we've seen. Make sure | |
265 | * it's cleared before then. */ | |
dc8cfa55 | 266 | channel->work_pending = false; |
5b9e207c BH |
267 | smp_wmb(); |
268 | ||
152b6a62 | 269 | efx_nic_eventq_read_ack(channel); |
8ceee660 BH |
270 | } |
271 | ||
272 | /* NAPI poll handler | |
273 | * | |
274 | * NAPI guarantees serialisation of polls of the same device, which | |
275 | * provides the guarantee required by efx_process_channel(). | |
276 | */ | |
277 | static int efx_poll(struct napi_struct *napi, int budget) | |
278 | { | |
279 | struct efx_channel *channel = | |
280 | container_of(napi, struct efx_channel, napi_str); | |
8ceee660 BH |
281 | int rx_packets; |
282 | ||
283 | EFX_TRACE(channel->efx, "channel %d NAPI poll executing on CPU %d\n", | |
284 | channel->channel, raw_smp_processor_id()); | |
285 | ||
42cbe2d7 | 286 | rx_packets = efx_process_channel(channel, budget); |
8ceee660 BH |
287 | |
288 | if (rx_packets < budget) { | |
6fb70fd1 BH |
289 | struct efx_nic *efx = channel->efx; |
290 | ||
291 | if (channel->used_flags & EFX_USED_BY_RX && | |
292 | efx->irq_rx_adaptive && | |
293 | unlikely(++channel->irq_count == 1000)) { | |
6fb70fd1 BH |
294 | if (unlikely(channel->irq_mod_score < |
295 | irq_adapt_low_thresh)) { | |
0d86ebd8 BH |
296 | if (channel->irq_moderation > 1) { |
297 | channel->irq_moderation -= 1; | |
ef2b90ee | 298 | efx->type->push_irq_moderation(channel); |
0d86ebd8 | 299 | } |
6fb70fd1 BH |
300 | } else if (unlikely(channel->irq_mod_score > |
301 | irq_adapt_high_thresh)) { | |
0d86ebd8 BH |
302 | if (channel->irq_moderation < |
303 | efx->irq_rx_moderation) { | |
304 | channel->irq_moderation += 1; | |
ef2b90ee | 305 | efx->type->push_irq_moderation(channel); |
0d86ebd8 | 306 | } |
6fb70fd1 | 307 | } |
6fb70fd1 BH |
308 | channel->irq_count = 0; |
309 | channel->irq_mod_score = 0; | |
310 | } | |
311 | ||
8ceee660 | 312 | /* There is no race here; although napi_disable() will |
288379f0 | 313 | * only wait for napi_complete(), this isn't a problem |
8ceee660 BH |
314 | * since efx_channel_processed() will have no effect if |
315 | * interrupts have already been disabled. | |
316 | */ | |
288379f0 | 317 | napi_complete(napi); |
8ceee660 BH |
318 | efx_channel_processed(channel); |
319 | } | |
320 | ||
321 | return rx_packets; | |
322 | } | |
323 | ||
324 | /* Process the eventq of the specified channel immediately on this CPU | |
325 | * | |
326 | * Disable hardware generated interrupts, wait for any existing | |
327 | * processing to finish, then directly poll (and ack ) the eventq. | |
328 | * Finally reenable NAPI and interrupts. | |
329 | * | |
330 | * Since we are touching interrupts the caller should hold the suspend lock | |
331 | */ | |
332 | void efx_process_channel_now(struct efx_channel *channel) | |
333 | { | |
334 | struct efx_nic *efx = channel->efx; | |
335 | ||
336 | BUG_ON(!channel->used_flags); | |
337 | BUG_ON(!channel->enabled); | |
338 | ||
339 | /* Disable interrupts and wait for ISRs to complete */ | |
152b6a62 | 340 | efx_nic_disable_interrupts(efx); |
8ceee660 BH |
341 | if (efx->legacy_irq) |
342 | synchronize_irq(efx->legacy_irq); | |
64ee3120 | 343 | if (channel->irq) |
8ceee660 BH |
344 | synchronize_irq(channel->irq); |
345 | ||
346 | /* Wait for any NAPI processing to complete */ | |
347 | napi_disable(&channel->napi_str); | |
348 | ||
349 | /* Poll the channel */ | |
3ffeabdd | 350 | efx_process_channel(channel, EFX_EVQ_SIZE); |
8ceee660 BH |
351 | |
352 | /* Ack the eventq. This may cause an interrupt to be generated | |
353 | * when they are reenabled */ | |
354 | efx_channel_processed(channel); | |
355 | ||
356 | napi_enable(&channel->napi_str); | |
152b6a62 | 357 | efx_nic_enable_interrupts(efx); |
8ceee660 BH |
358 | } |
359 | ||
360 | /* Create event queue | |
361 | * Event queue memory allocations are done only once. If the channel | |
362 | * is reset, the memory buffer will be reused; this guards against | |
363 | * errors during channel reset and also simplifies interrupt handling. | |
364 | */ | |
365 | static int efx_probe_eventq(struct efx_channel *channel) | |
366 | { | |
367 | EFX_LOG(channel->efx, "chan %d create event queue\n", channel->channel); | |
368 | ||
152b6a62 | 369 | return efx_nic_probe_eventq(channel); |
8ceee660 BH |
370 | } |
371 | ||
372 | /* Prepare channel's event queue */ | |
bc3c90a2 | 373 | static void efx_init_eventq(struct efx_channel *channel) |
8ceee660 BH |
374 | { |
375 | EFX_LOG(channel->efx, "chan %d init event queue\n", channel->channel); | |
376 | ||
377 | channel->eventq_read_ptr = 0; | |
378 | ||
152b6a62 | 379 | efx_nic_init_eventq(channel); |
8ceee660 BH |
380 | } |
381 | ||
382 | static void efx_fini_eventq(struct efx_channel *channel) | |
383 | { | |
384 | EFX_LOG(channel->efx, "chan %d fini event queue\n", channel->channel); | |
385 | ||
152b6a62 | 386 | efx_nic_fini_eventq(channel); |
8ceee660 BH |
387 | } |
388 | ||
389 | static void efx_remove_eventq(struct efx_channel *channel) | |
390 | { | |
391 | EFX_LOG(channel->efx, "chan %d remove event queue\n", channel->channel); | |
392 | ||
152b6a62 | 393 | efx_nic_remove_eventq(channel); |
8ceee660 BH |
394 | } |
395 | ||
396 | /************************************************************************** | |
397 | * | |
398 | * Channel handling | |
399 | * | |
400 | *************************************************************************/ | |
401 | ||
8ceee660 BH |
402 | static int efx_probe_channel(struct efx_channel *channel) |
403 | { | |
404 | struct efx_tx_queue *tx_queue; | |
405 | struct efx_rx_queue *rx_queue; | |
406 | int rc; | |
407 | ||
408 | EFX_LOG(channel->efx, "creating channel %d\n", channel->channel); | |
409 | ||
410 | rc = efx_probe_eventq(channel); | |
411 | if (rc) | |
412 | goto fail1; | |
413 | ||
414 | efx_for_each_channel_tx_queue(tx_queue, channel) { | |
415 | rc = efx_probe_tx_queue(tx_queue); | |
416 | if (rc) | |
417 | goto fail2; | |
418 | } | |
419 | ||
420 | efx_for_each_channel_rx_queue(rx_queue, channel) { | |
421 | rc = efx_probe_rx_queue(rx_queue); | |
422 | if (rc) | |
423 | goto fail3; | |
424 | } | |
425 | ||
426 | channel->n_rx_frm_trunc = 0; | |
427 | ||
428 | return 0; | |
429 | ||
430 | fail3: | |
431 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
432 | efx_remove_rx_queue(rx_queue); | |
433 | fail2: | |
434 | efx_for_each_channel_tx_queue(tx_queue, channel) | |
435 | efx_remove_tx_queue(tx_queue); | |
436 | fail1: | |
437 | return rc; | |
438 | } | |
439 | ||
440 | ||
56536e9c BH |
441 | static void efx_set_channel_names(struct efx_nic *efx) |
442 | { | |
443 | struct efx_channel *channel; | |
444 | const char *type = ""; | |
445 | int number; | |
446 | ||
447 | efx_for_each_channel(channel, efx) { | |
448 | number = channel->channel; | |
449 | if (efx->n_channels > efx->n_rx_queues) { | |
450 | if (channel->channel < efx->n_rx_queues) { | |
451 | type = "-rx"; | |
452 | } else { | |
453 | type = "-tx"; | |
454 | number -= efx->n_rx_queues; | |
455 | } | |
456 | } | |
457 | snprintf(channel->name, sizeof(channel->name), | |
458 | "%s%s-%d", efx->name, type, number); | |
459 | } | |
460 | } | |
461 | ||
8ceee660 BH |
462 | /* Channels are shutdown and reinitialised whilst the NIC is running |
463 | * to propagate configuration changes (mtu, checksum offload), or | |
464 | * to clear hardware error conditions | |
465 | */ | |
bc3c90a2 | 466 | static void efx_init_channels(struct efx_nic *efx) |
8ceee660 BH |
467 | { |
468 | struct efx_tx_queue *tx_queue; | |
469 | struct efx_rx_queue *rx_queue; | |
470 | struct efx_channel *channel; | |
8ceee660 | 471 | |
f7f13b0b BH |
472 | /* Calculate the rx buffer allocation parameters required to |
473 | * support the current MTU, including padding for header | |
474 | * alignment and overruns. | |
475 | */ | |
476 | efx->rx_buffer_len = (max(EFX_PAGE_IP_ALIGN, NET_IP_ALIGN) + | |
477 | EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + | |
478 | efx->type->rx_buffer_padding); | |
479 | efx->rx_buffer_order = get_order(efx->rx_buffer_len); | |
8ceee660 BH |
480 | |
481 | /* Initialise the channels */ | |
482 | efx_for_each_channel(channel, efx) { | |
483 | EFX_LOG(channel->efx, "init chan %d\n", channel->channel); | |
484 | ||
bc3c90a2 | 485 | efx_init_eventq(channel); |
8ceee660 | 486 | |
bc3c90a2 BH |
487 | efx_for_each_channel_tx_queue(tx_queue, channel) |
488 | efx_init_tx_queue(tx_queue); | |
8ceee660 BH |
489 | |
490 | /* The rx buffer allocation strategy is MTU dependent */ | |
491 | efx_rx_strategy(channel); | |
492 | ||
bc3c90a2 BH |
493 | efx_for_each_channel_rx_queue(rx_queue, channel) |
494 | efx_init_rx_queue(rx_queue); | |
8ceee660 BH |
495 | |
496 | WARN_ON(channel->rx_pkt != NULL); | |
497 | efx_rx_strategy(channel); | |
498 | } | |
8ceee660 BH |
499 | } |
500 | ||
501 | /* This enables event queue processing and packet transmission. | |
502 | * | |
503 | * Note that this function is not allowed to fail, since that would | |
504 | * introduce too much complexity into the suspend/resume path. | |
505 | */ | |
506 | static void efx_start_channel(struct efx_channel *channel) | |
507 | { | |
508 | struct efx_rx_queue *rx_queue; | |
509 | ||
510 | EFX_LOG(channel->efx, "starting chan %d\n", channel->channel); | |
511 | ||
5b9e207c BH |
512 | /* The interrupt handler for this channel may set work_pending |
513 | * as soon as we enable it. Make sure it's cleared before | |
514 | * then. Similarly, make sure it sees the enabled flag set. */ | |
dc8cfa55 BH |
515 | channel->work_pending = false; |
516 | channel->enabled = true; | |
5b9e207c | 517 | smp_wmb(); |
8ceee660 BH |
518 | |
519 | napi_enable(&channel->napi_str); | |
520 | ||
521 | /* Load up RX descriptors */ | |
522 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
523 | efx_fast_push_rx_descriptors(rx_queue); | |
524 | } | |
525 | ||
526 | /* This disables event queue processing and packet transmission. | |
527 | * This function does not guarantee that all queue processing | |
528 | * (e.g. RX refill) is complete. | |
529 | */ | |
530 | static void efx_stop_channel(struct efx_channel *channel) | |
531 | { | |
532 | struct efx_rx_queue *rx_queue; | |
533 | ||
534 | if (!channel->enabled) | |
535 | return; | |
536 | ||
537 | EFX_LOG(channel->efx, "stop chan %d\n", channel->channel); | |
538 | ||
dc8cfa55 | 539 | channel->enabled = false; |
8ceee660 BH |
540 | napi_disable(&channel->napi_str); |
541 | ||
542 | /* Ensure that any worker threads have exited or will be no-ops */ | |
543 | efx_for_each_channel_rx_queue(rx_queue, channel) { | |
544 | spin_lock_bh(&rx_queue->add_lock); | |
545 | spin_unlock_bh(&rx_queue->add_lock); | |
546 | } | |
547 | } | |
548 | ||
549 | static void efx_fini_channels(struct efx_nic *efx) | |
550 | { | |
551 | struct efx_channel *channel; | |
552 | struct efx_tx_queue *tx_queue; | |
553 | struct efx_rx_queue *rx_queue; | |
6bc5d3a9 | 554 | int rc; |
8ceee660 BH |
555 | |
556 | EFX_ASSERT_RESET_SERIALISED(efx); | |
557 | BUG_ON(efx->port_enabled); | |
558 | ||
152b6a62 | 559 | rc = efx_nic_flush_queues(efx); |
6bc5d3a9 BH |
560 | if (rc) |
561 | EFX_ERR(efx, "failed to flush queues\n"); | |
562 | else | |
563 | EFX_LOG(efx, "successfully flushed all queues\n"); | |
564 | ||
8ceee660 BH |
565 | efx_for_each_channel(channel, efx) { |
566 | EFX_LOG(channel->efx, "shut down chan %d\n", channel->channel); | |
567 | ||
568 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
569 | efx_fini_rx_queue(rx_queue); | |
570 | efx_for_each_channel_tx_queue(tx_queue, channel) | |
571 | efx_fini_tx_queue(tx_queue); | |
8ceee660 BH |
572 | efx_fini_eventq(channel); |
573 | } | |
574 | } | |
575 | ||
576 | static void efx_remove_channel(struct efx_channel *channel) | |
577 | { | |
578 | struct efx_tx_queue *tx_queue; | |
579 | struct efx_rx_queue *rx_queue; | |
580 | ||
581 | EFX_LOG(channel->efx, "destroy chan %d\n", channel->channel); | |
582 | ||
583 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
584 | efx_remove_rx_queue(rx_queue); | |
585 | efx_for_each_channel_tx_queue(tx_queue, channel) | |
586 | efx_remove_tx_queue(tx_queue); | |
587 | efx_remove_eventq(channel); | |
588 | ||
589 | channel->used_flags = 0; | |
590 | } | |
591 | ||
592 | void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue, int delay) | |
593 | { | |
594 | queue_delayed_work(refill_workqueue, &rx_queue->work, delay); | |
595 | } | |
596 | ||
597 | /************************************************************************** | |
598 | * | |
599 | * Port handling | |
600 | * | |
601 | **************************************************************************/ | |
602 | ||
603 | /* This ensures that the kernel is kept informed (via | |
604 | * netif_carrier_on/off) of the link status, and also maintains the | |
605 | * link status's stop on the port's TX queue. | |
606 | */ | |
fdaa9aed | 607 | void efx_link_status_changed(struct efx_nic *efx) |
8ceee660 | 608 | { |
eb50c0d6 BH |
609 | struct efx_link_state *link_state = &efx->link_state; |
610 | ||
8ceee660 BH |
611 | /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure |
612 | * that no events are triggered between unregister_netdev() and the | |
613 | * driver unloading. A more general condition is that NETDEV_CHANGE | |
614 | * can only be generated between NETDEV_UP and NETDEV_DOWN */ | |
615 | if (!netif_running(efx->net_dev)) | |
616 | return; | |
617 | ||
8c8661e4 BH |
618 | if (efx->port_inhibited) { |
619 | netif_carrier_off(efx->net_dev); | |
620 | return; | |
621 | } | |
622 | ||
eb50c0d6 | 623 | if (link_state->up != netif_carrier_ok(efx->net_dev)) { |
8ceee660 BH |
624 | efx->n_link_state_changes++; |
625 | ||
eb50c0d6 | 626 | if (link_state->up) |
8ceee660 BH |
627 | netif_carrier_on(efx->net_dev); |
628 | else | |
629 | netif_carrier_off(efx->net_dev); | |
630 | } | |
631 | ||
632 | /* Status message for kernel log */ | |
eb50c0d6 | 633 | if (link_state->up) { |
f31a45d2 | 634 | EFX_INFO(efx, "link up at %uMbps %s-duplex (MTU %d)%s\n", |
eb50c0d6 | 635 | link_state->speed, link_state->fd ? "full" : "half", |
8ceee660 BH |
636 | efx->net_dev->mtu, |
637 | (efx->promiscuous ? " [PROMISC]" : "")); | |
638 | } else { | |
639 | EFX_INFO(efx, "link down\n"); | |
640 | } | |
641 | ||
642 | } | |
643 | ||
d3245b28 BH |
644 | void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) |
645 | { | |
646 | efx->link_advertising = advertising; | |
647 | if (advertising) { | |
648 | if (advertising & ADVERTISED_Pause) | |
649 | efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); | |
650 | else | |
651 | efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); | |
652 | if (advertising & ADVERTISED_Asym_Pause) | |
653 | efx->wanted_fc ^= EFX_FC_TX; | |
654 | } | |
655 | } | |
656 | ||
657 | void efx_link_set_wanted_fc(struct efx_nic *efx, enum efx_fc_type wanted_fc) | |
658 | { | |
659 | efx->wanted_fc = wanted_fc; | |
660 | if (efx->link_advertising) { | |
661 | if (wanted_fc & EFX_FC_RX) | |
662 | efx->link_advertising |= (ADVERTISED_Pause | | |
663 | ADVERTISED_Asym_Pause); | |
664 | else | |
665 | efx->link_advertising &= ~(ADVERTISED_Pause | | |
666 | ADVERTISED_Asym_Pause); | |
667 | if (wanted_fc & EFX_FC_TX) | |
668 | efx->link_advertising ^= ADVERTISED_Asym_Pause; | |
669 | } | |
670 | } | |
671 | ||
115122af BH |
672 | static void efx_fini_port(struct efx_nic *efx); |
673 | ||
d3245b28 BH |
674 | /* Push loopback/power/transmit disable settings to the PHY, and reconfigure |
675 | * the MAC appropriately. All other PHY configuration changes are pushed | |
676 | * through phy_op->set_settings(), and pushed asynchronously to the MAC | |
677 | * through efx_monitor(). | |
678 | * | |
679 | * Callers must hold the mac_lock | |
680 | */ | |
681 | int __efx_reconfigure_port(struct efx_nic *efx) | |
8ceee660 | 682 | { |
d3245b28 BH |
683 | enum efx_phy_mode phy_mode; |
684 | int rc; | |
8ceee660 | 685 | |
d3245b28 | 686 | WARN_ON(!mutex_is_locked(&efx->mac_lock)); |
8ceee660 | 687 | |
a816f75a BH |
688 | /* Serialise the promiscuous flag with efx_set_multicast_list. */ |
689 | if (efx_dev_registered(efx)) { | |
690 | netif_addr_lock_bh(efx->net_dev); | |
691 | netif_addr_unlock_bh(efx->net_dev); | |
692 | } | |
693 | ||
d3245b28 BH |
694 | /* Disable PHY transmit in mac level loopbacks */ |
695 | phy_mode = efx->phy_mode; | |
177dfcd8 BH |
696 | if (LOOPBACK_INTERNAL(efx)) |
697 | efx->phy_mode |= PHY_MODE_TX_DISABLED; | |
698 | else | |
699 | efx->phy_mode &= ~PHY_MODE_TX_DISABLED; | |
177dfcd8 | 700 | |
d3245b28 | 701 | rc = efx->type->reconfigure_port(efx); |
8ceee660 | 702 | |
d3245b28 BH |
703 | if (rc) |
704 | efx->phy_mode = phy_mode; | |
177dfcd8 | 705 | |
d3245b28 | 706 | return rc; |
8ceee660 BH |
707 | } |
708 | ||
709 | /* Reinitialise the MAC to pick up new PHY settings, even if the port is | |
710 | * disabled. */ | |
d3245b28 | 711 | int efx_reconfigure_port(struct efx_nic *efx) |
8ceee660 | 712 | { |
d3245b28 BH |
713 | int rc; |
714 | ||
8ceee660 BH |
715 | EFX_ASSERT_RESET_SERIALISED(efx); |
716 | ||
717 | mutex_lock(&efx->mac_lock); | |
d3245b28 | 718 | rc = __efx_reconfigure_port(efx); |
8ceee660 | 719 | mutex_unlock(&efx->mac_lock); |
d3245b28 BH |
720 | |
721 | return rc; | |
8ceee660 BH |
722 | } |
723 | ||
8be4f3e6 BH |
724 | /* Asynchronous work item for changing MAC promiscuity and multicast |
725 | * hash. Avoid a drain/rx_ingress enable by reconfiguring the current | |
726 | * MAC directly. */ | |
766ca0fa BH |
727 | static void efx_mac_work(struct work_struct *data) |
728 | { | |
729 | struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); | |
730 | ||
731 | mutex_lock(&efx->mac_lock); | |
8be4f3e6 | 732 | if (efx->port_enabled) { |
ef2b90ee | 733 | efx->type->push_multicast_hash(efx); |
8be4f3e6 BH |
734 | efx->mac_op->reconfigure(efx); |
735 | } | |
766ca0fa BH |
736 | mutex_unlock(&efx->mac_lock); |
737 | } | |
738 | ||
8ceee660 BH |
739 | static int efx_probe_port(struct efx_nic *efx) |
740 | { | |
741 | int rc; | |
742 | ||
743 | EFX_LOG(efx, "create port\n"); | |
744 | ||
ff3b00a0 SH |
745 | if (phy_flash_cfg) |
746 | efx->phy_mode = PHY_MODE_SPECIAL; | |
747 | ||
ef2b90ee BH |
748 | /* Connect up MAC/PHY operations table */ |
749 | rc = efx->type->probe_port(efx); | |
8ceee660 BH |
750 | if (rc) |
751 | goto err; | |
752 | ||
753 | /* Sanity check MAC address */ | |
754 | if (is_valid_ether_addr(efx->mac_address)) { | |
755 | memcpy(efx->net_dev->dev_addr, efx->mac_address, ETH_ALEN); | |
756 | } else { | |
e174961c JB |
757 | EFX_ERR(efx, "invalid MAC address %pM\n", |
758 | efx->mac_address); | |
8ceee660 BH |
759 | if (!allow_bad_hwaddr) { |
760 | rc = -EINVAL; | |
761 | goto err; | |
762 | } | |
763 | random_ether_addr(efx->net_dev->dev_addr); | |
e174961c JB |
764 | EFX_INFO(efx, "using locally-generated MAC %pM\n", |
765 | efx->net_dev->dev_addr); | |
8ceee660 BH |
766 | } |
767 | ||
768 | return 0; | |
769 | ||
770 | err: | |
771 | efx_remove_port(efx); | |
772 | return rc; | |
773 | } | |
774 | ||
775 | static int efx_init_port(struct efx_nic *efx) | |
776 | { | |
777 | int rc; | |
778 | ||
779 | EFX_LOG(efx, "init port\n"); | |
780 | ||
1dfc5cea BH |
781 | mutex_lock(&efx->mac_lock); |
782 | ||
177dfcd8 | 783 | rc = efx->phy_op->init(efx); |
8ceee660 | 784 | if (rc) |
1dfc5cea | 785 | goto fail1; |
8ceee660 | 786 | |
dc8cfa55 | 787 | efx->port_initialized = true; |
1dfc5cea | 788 | |
d3245b28 BH |
789 | /* Reconfigure the MAC before creating dma queues (required for |
790 | * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ | |
791 | efx->mac_op->reconfigure(efx); | |
792 | ||
793 | /* Ensure the PHY advertises the correct flow control settings */ | |
794 | rc = efx->phy_op->reconfigure(efx); | |
795 | if (rc) | |
796 | goto fail2; | |
797 | ||
1dfc5cea | 798 | mutex_unlock(&efx->mac_lock); |
8ceee660 | 799 | return 0; |
177dfcd8 | 800 | |
1dfc5cea | 801 | fail2: |
177dfcd8 | 802 | efx->phy_op->fini(efx); |
1dfc5cea BH |
803 | fail1: |
804 | mutex_unlock(&efx->mac_lock); | |
177dfcd8 | 805 | return rc; |
8ceee660 BH |
806 | } |
807 | ||
8ceee660 BH |
808 | static void efx_start_port(struct efx_nic *efx) |
809 | { | |
810 | EFX_LOG(efx, "start port\n"); | |
811 | BUG_ON(efx->port_enabled); | |
812 | ||
813 | mutex_lock(&efx->mac_lock); | |
dc8cfa55 | 814 | efx->port_enabled = true; |
8be4f3e6 BH |
815 | |
816 | /* efx_mac_work() might have been scheduled after efx_stop_port(), | |
817 | * and then cancelled by efx_flush_all() */ | |
ef2b90ee | 818 | efx->type->push_multicast_hash(efx); |
8be4f3e6 BH |
819 | efx->mac_op->reconfigure(efx); |
820 | ||
8ceee660 BH |
821 | mutex_unlock(&efx->mac_lock); |
822 | } | |
823 | ||
fdaa9aed | 824 | /* Prevent efx_mac_work() and efx_monitor() from working */ |
8ceee660 BH |
825 | static void efx_stop_port(struct efx_nic *efx) |
826 | { | |
827 | EFX_LOG(efx, "stop port\n"); | |
828 | ||
829 | mutex_lock(&efx->mac_lock); | |
dc8cfa55 | 830 | efx->port_enabled = false; |
8ceee660 BH |
831 | mutex_unlock(&efx->mac_lock); |
832 | ||
833 | /* Serialise against efx_set_multicast_list() */ | |
55668611 | 834 | if (efx_dev_registered(efx)) { |
b9e40857 DM |
835 | netif_addr_lock_bh(efx->net_dev); |
836 | netif_addr_unlock_bh(efx->net_dev); | |
8ceee660 BH |
837 | } |
838 | } | |
839 | ||
840 | static void efx_fini_port(struct efx_nic *efx) | |
841 | { | |
842 | EFX_LOG(efx, "shut down port\n"); | |
843 | ||
844 | if (!efx->port_initialized) | |
845 | return; | |
846 | ||
177dfcd8 | 847 | efx->phy_op->fini(efx); |
dc8cfa55 | 848 | efx->port_initialized = false; |
8ceee660 | 849 | |
eb50c0d6 | 850 | efx->link_state.up = false; |
8ceee660 BH |
851 | efx_link_status_changed(efx); |
852 | } | |
853 | ||
854 | static void efx_remove_port(struct efx_nic *efx) | |
855 | { | |
856 | EFX_LOG(efx, "destroying port\n"); | |
857 | ||
ef2b90ee | 858 | efx->type->remove_port(efx); |
8ceee660 BH |
859 | } |
860 | ||
861 | /************************************************************************** | |
862 | * | |
863 | * NIC handling | |
864 | * | |
865 | **************************************************************************/ | |
866 | ||
867 | /* This configures the PCI device to enable I/O and DMA. */ | |
868 | static int efx_init_io(struct efx_nic *efx) | |
869 | { | |
870 | struct pci_dev *pci_dev = efx->pci_dev; | |
871 | dma_addr_t dma_mask = efx->type->max_dma_mask; | |
872 | int rc; | |
873 | ||
874 | EFX_LOG(efx, "initialising I/O\n"); | |
875 | ||
876 | rc = pci_enable_device(pci_dev); | |
877 | if (rc) { | |
878 | EFX_ERR(efx, "failed to enable PCI device\n"); | |
879 | goto fail1; | |
880 | } | |
881 | ||
882 | pci_set_master(pci_dev); | |
883 | ||
884 | /* Set the PCI DMA mask. Try all possibilities from our | |
885 | * genuine mask down to 32 bits, because some architectures | |
886 | * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit | |
887 | * masks event though they reject 46 bit masks. | |
888 | */ | |
889 | while (dma_mask > 0x7fffffffUL) { | |
890 | if (pci_dma_supported(pci_dev, dma_mask) && | |
891 | ((rc = pci_set_dma_mask(pci_dev, dma_mask)) == 0)) | |
892 | break; | |
893 | dma_mask >>= 1; | |
894 | } | |
895 | if (rc) { | |
896 | EFX_ERR(efx, "could not find a suitable DMA mask\n"); | |
897 | goto fail2; | |
898 | } | |
899 | EFX_LOG(efx, "using DMA mask %llx\n", (unsigned long long) dma_mask); | |
900 | rc = pci_set_consistent_dma_mask(pci_dev, dma_mask); | |
901 | if (rc) { | |
902 | /* pci_set_consistent_dma_mask() is not *allowed* to | |
903 | * fail with a mask that pci_set_dma_mask() accepted, | |
904 | * but just in case... | |
905 | */ | |
906 | EFX_ERR(efx, "failed to set consistent DMA mask\n"); | |
907 | goto fail2; | |
908 | } | |
909 | ||
dc803df8 BH |
910 | efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR); |
911 | rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc"); | |
8ceee660 BH |
912 | if (rc) { |
913 | EFX_ERR(efx, "request for memory BAR failed\n"); | |
914 | rc = -EIO; | |
915 | goto fail3; | |
916 | } | |
917 | efx->membase = ioremap_nocache(efx->membase_phys, | |
918 | efx->type->mem_map_size); | |
919 | if (!efx->membase) { | |
dc803df8 | 920 | EFX_ERR(efx, "could not map memory BAR at %llx+%x\n", |
086ea356 | 921 | (unsigned long long)efx->membase_phys, |
8ceee660 BH |
922 | efx->type->mem_map_size); |
923 | rc = -ENOMEM; | |
924 | goto fail4; | |
925 | } | |
dc803df8 BH |
926 | EFX_LOG(efx, "memory BAR at %llx+%x (virtual %p)\n", |
927 | (unsigned long long)efx->membase_phys, | |
086ea356 | 928 | efx->type->mem_map_size, efx->membase); |
8ceee660 BH |
929 | |
930 | return 0; | |
931 | ||
932 | fail4: | |
dc803df8 | 933 | pci_release_region(efx->pci_dev, EFX_MEM_BAR); |
8ceee660 | 934 | fail3: |
2c118e0f | 935 | efx->membase_phys = 0; |
8ceee660 BH |
936 | fail2: |
937 | pci_disable_device(efx->pci_dev); | |
938 | fail1: | |
939 | return rc; | |
940 | } | |
941 | ||
942 | static void efx_fini_io(struct efx_nic *efx) | |
943 | { | |
944 | EFX_LOG(efx, "shutting down I/O\n"); | |
945 | ||
946 | if (efx->membase) { | |
947 | iounmap(efx->membase); | |
948 | efx->membase = NULL; | |
949 | } | |
950 | ||
951 | if (efx->membase_phys) { | |
dc803df8 | 952 | pci_release_region(efx->pci_dev, EFX_MEM_BAR); |
2c118e0f | 953 | efx->membase_phys = 0; |
8ceee660 BH |
954 | } |
955 | ||
956 | pci_disable_device(efx->pci_dev); | |
957 | } | |
958 | ||
46123d04 BH |
959 | /* Get number of RX queues wanted. Return number of online CPU |
960 | * packages in the expectation that an IRQ balancer will spread | |
961 | * interrupts across them. */ | |
962 | static int efx_wanted_rx_queues(void) | |
963 | { | |
2f8975fb | 964 | cpumask_var_t core_mask; |
46123d04 BH |
965 | int count; |
966 | int cpu; | |
967 | ||
79f55997 | 968 | if (unlikely(!zalloc_cpumask_var(&core_mask, GFP_KERNEL))) { |
2f8975fb | 969 | printk(KERN_WARNING |
3977d033 | 970 | "sfc: RSS disabled due to allocation failure\n"); |
2f8975fb RR |
971 | return 1; |
972 | } | |
973 | ||
46123d04 BH |
974 | count = 0; |
975 | for_each_online_cpu(cpu) { | |
2f8975fb | 976 | if (!cpumask_test_cpu(cpu, core_mask)) { |
46123d04 | 977 | ++count; |
2f8975fb | 978 | cpumask_or(core_mask, core_mask, |
fbd59a8d | 979 | topology_core_cpumask(cpu)); |
46123d04 BH |
980 | } |
981 | } | |
982 | ||
2f8975fb | 983 | free_cpumask_var(core_mask); |
46123d04 BH |
984 | return count; |
985 | } | |
986 | ||
987 | /* Probe the number and type of interrupts we are able to obtain, and | |
988 | * the resulting numbers of channels and RX queues. | |
989 | */ | |
8ceee660 BH |
990 | static void efx_probe_interrupts(struct efx_nic *efx) |
991 | { | |
46123d04 BH |
992 | int max_channels = |
993 | min_t(int, efx->type->phys_addr_channels, EFX_MAX_CHANNELS); | |
8ceee660 BH |
994 | int rc, i; |
995 | ||
996 | if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { | |
46123d04 BH |
997 | struct msix_entry xentries[EFX_MAX_CHANNELS]; |
998 | int wanted_ints; | |
28b581ab | 999 | int rx_queues; |
aa6ef27e | 1000 | |
46123d04 BH |
1001 | /* We want one RX queue and interrupt per CPU package |
1002 | * (or as specified by the rss_cpus module parameter). | |
1003 | * We will need one channel per interrupt. | |
1004 | */ | |
28b581ab NT |
1005 | rx_queues = rss_cpus ? rss_cpus : efx_wanted_rx_queues(); |
1006 | wanted_ints = rx_queues + (separate_tx_channels ? 1 : 0); | |
1007 | wanted_ints = min(wanted_ints, max_channels); | |
8ceee660 | 1008 | |
28b581ab | 1009 | for (i = 0; i < wanted_ints; i++) |
8ceee660 | 1010 | xentries[i].entry = i; |
28b581ab | 1011 | rc = pci_enable_msix(efx->pci_dev, xentries, wanted_ints); |
8ceee660 | 1012 | if (rc > 0) { |
28b581ab NT |
1013 | EFX_ERR(efx, "WARNING: Insufficient MSI-X vectors" |
1014 | " available (%d < %d).\n", rc, wanted_ints); | |
1015 | EFX_ERR(efx, "WARNING: Performance may be reduced.\n"); | |
1016 | EFX_BUG_ON_PARANOID(rc >= wanted_ints); | |
1017 | wanted_ints = rc; | |
8ceee660 | 1018 | rc = pci_enable_msix(efx->pci_dev, xentries, |
28b581ab | 1019 | wanted_ints); |
8ceee660 BH |
1020 | } |
1021 | ||
1022 | if (rc == 0) { | |
28b581ab NT |
1023 | efx->n_rx_queues = min(rx_queues, wanted_ints); |
1024 | efx->n_channels = wanted_ints; | |
1025 | for (i = 0; i < wanted_ints; i++) | |
8ceee660 | 1026 | efx->channel[i].irq = xentries[i].vector; |
8ceee660 BH |
1027 | } else { |
1028 | /* Fall back to single channel MSI */ | |
1029 | efx->interrupt_mode = EFX_INT_MODE_MSI; | |
1030 | EFX_ERR(efx, "could not enable MSI-X\n"); | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | /* Try single interrupt MSI */ | |
1035 | if (efx->interrupt_mode == EFX_INT_MODE_MSI) { | |
8831da7b | 1036 | efx->n_rx_queues = 1; |
28b581ab | 1037 | efx->n_channels = 1; |
8ceee660 BH |
1038 | rc = pci_enable_msi(efx->pci_dev); |
1039 | if (rc == 0) { | |
1040 | efx->channel[0].irq = efx->pci_dev->irq; | |
8ceee660 BH |
1041 | } else { |
1042 | EFX_ERR(efx, "could not enable MSI\n"); | |
1043 | efx->interrupt_mode = EFX_INT_MODE_LEGACY; | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | /* Assume legacy interrupts */ | |
1048 | if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { | |
8831da7b | 1049 | efx->n_rx_queues = 1; |
28b581ab | 1050 | efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); |
8ceee660 BH |
1051 | efx->legacy_irq = efx->pci_dev->irq; |
1052 | } | |
1053 | } | |
1054 | ||
1055 | static void efx_remove_interrupts(struct efx_nic *efx) | |
1056 | { | |
1057 | struct efx_channel *channel; | |
1058 | ||
1059 | /* Remove MSI/MSI-X interrupts */ | |
64ee3120 | 1060 | efx_for_each_channel(channel, efx) |
8ceee660 BH |
1061 | channel->irq = 0; |
1062 | pci_disable_msi(efx->pci_dev); | |
1063 | pci_disable_msix(efx->pci_dev); | |
1064 | ||
1065 | /* Remove legacy interrupt */ | |
1066 | efx->legacy_irq = 0; | |
1067 | } | |
1068 | ||
8831da7b | 1069 | static void efx_set_channels(struct efx_nic *efx) |
8ceee660 BH |
1070 | { |
1071 | struct efx_tx_queue *tx_queue; | |
1072 | struct efx_rx_queue *rx_queue; | |
8ceee660 | 1073 | |
60ac1065 | 1074 | efx_for_each_tx_queue(tx_queue, efx) { |
28b581ab NT |
1075 | if (separate_tx_channels) |
1076 | tx_queue->channel = &efx->channel[efx->n_channels-1]; | |
60ac1065 BH |
1077 | else |
1078 | tx_queue->channel = &efx->channel[0]; | |
1079 | tx_queue->channel->used_flags |= EFX_USED_BY_TX; | |
1080 | } | |
8ceee660 | 1081 | |
8831da7b BH |
1082 | efx_for_each_rx_queue(rx_queue, efx) { |
1083 | rx_queue->channel = &efx->channel[rx_queue->queue]; | |
1084 | rx_queue->channel->used_flags |= EFX_USED_BY_RX; | |
8ceee660 BH |
1085 | } |
1086 | } | |
1087 | ||
1088 | static int efx_probe_nic(struct efx_nic *efx) | |
1089 | { | |
1090 | int rc; | |
1091 | ||
1092 | EFX_LOG(efx, "creating NIC\n"); | |
1093 | ||
1094 | /* Carry out hardware-type specific initialisation */ | |
ef2b90ee | 1095 | rc = efx->type->probe(efx); |
8ceee660 BH |
1096 | if (rc) |
1097 | return rc; | |
1098 | ||
1099 | /* Determine the number of channels and RX queues by trying to hook | |
1100 | * in MSI-X interrupts. */ | |
1101 | efx_probe_interrupts(efx); | |
1102 | ||
8831da7b | 1103 | efx_set_channels(efx); |
8ceee660 BH |
1104 | |
1105 | /* Initialise the interrupt moderation settings */ | |
6fb70fd1 | 1106 | efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true); |
8ceee660 BH |
1107 | |
1108 | return 0; | |
1109 | } | |
1110 | ||
1111 | static void efx_remove_nic(struct efx_nic *efx) | |
1112 | { | |
1113 | EFX_LOG(efx, "destroying NIC\n"); | |
1114 | ||
1115 | efx_remove_interrupts(efx); | |
ef2b90ee | 1116 | efx->type->remove(efx); |
8ceee660 BH |
1117 | } |
1118 | ||
1119 | /************************************************************************** | |
1120 | * | |
1121 | * NIC startup/shutdown | |
1122 | * | |
1123 | *************************************************************************/ | |
1124 | ||
1125 | static int efx_probe_all(struct efx_nic *efx) | |
1126 | { | |
1127 | struct efx_channel *channel; | |
1128 | int rc; | |
1129 | ||
1130 | /* Create NIC */ | |
1131 | rc = efx_probe_nic(efx); | |
1132 | if (rc) { | |
1133 | EFX_ERR(efx, "failed to create NIC\n"); | |
1134 | goto fail1; | |
1135 | } | |
1136 | ||
1137 | /* Create port */ | |
1138 | rc = efx_probe_port(efx); | |
1139 | if (rc) { | |
1140 | EFX_ERR(efx, "failed to create port\n"); | |
1141 | goto fail2; | |
1142 | } | |
1143 | ||
1144 | /* Create channels */ | |
1145 | efx_for_each_channel(channel, efx) { | |
1146 | rc = efx_probe_channel(channel); | |
1147 | if (rc) { | |
1148 | EFX_ERR(efx, "failed to create channel %d\n", | |
1149 | channel->channel); | |
1150 | goto fail3; | |
1151 | } | |
1152 | } | |
56536e9c | 1153 | efx_set_channel_names(efx); |
8ceee660 BH |
1154 | |
1155 | return 0; | |
1156 | ||
1157 | fail3: | |
1158 | efx_for_each_channel(channel, efx) | |
1159 | efx_remove_channel(channel); | |
1160 | efx_remove_port(efx); | |
1161 | fail2: | |
1162 | efx_remove_nic(efx); | |
1163 | fail1: | |
1164 | return rc; | |
1165 | } | |
1166 | ||
1167 | /* Called after previous invocation(s) of efx_stop_all, restarts the | |
1168 | * port, kernel transmit queue, NAPI processing and hardware interrupts, | |
1169 | * and ensures that the port is scheduled to be reconfigured. | |
1170 | * This function is safe to call multiple times when the NIC is in any | |
1171 | * state. */ | |
1172 | static void efx_start_all(struct efx_nic *efx) | |
1173 | { | |
1174 | struct efx_channel *channel; | |
1175 | ||
1176 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1177 | ||
1178 | /* Check that it is appropriate to restart the interface. All | |
1179 | * of these flags are safe to read under just the rtnl lock */ | |
1180 | if (efx->port_enabled) | |
1181 | return; | |
1182 | if ((efx->state != STATE_RUNNING) && (efx->state != STATE_INIT)) | |
1183 | return; | |
55668611 | 1184 | if (efx_dev_registered(efx) && !netif_running(efx->net_dev)) |
8ceee660 BH |
1185 | return; |
1186 | ||
1187 | /* Mark the port as enabled so port reconfigurations can start, then | |
1188 | * restart the transmit interface early so the watchdog timer stops */ | |
1189 | efx_start_port(efx); | |
dacccc74 SH |
1190 | if (efx_dev_registered(efx)) |
1191 | efx_wake_queue(efx); | |
8ceee660 BH |
1192 | |
1193 | efx_for_each_channel(channel, efx) | |
1194 | efx_start_channel(channel); | |
1195 | ||
152b6a62 | 1196 | efx_nic_enable_interrupts(efx); |
8ceee660 | 1197 | |
8880f4ec BH |
1198 | /* Switch to event based MCDI completions after enabling interrupts. |
1199 | * If a reset has been scheduled, then we need to stay in polled mode. | |
1200 | * Rather than serialising efx_mcdi_mode_event() [which sleeps] and | |
1201 | * reset_pending [modified from an atomic context], we instead guarantee | |
1202 | * that efx_mcdi_mode_poll() isn't reverted erroneously */ | |
1203 | efx_mcdi_mode_event(efx); | |
1204 | if (efx->reset_pending != RESET_TYPE_NONE) | |
1205 | efx_mcdi_mode_poll(efx); | |
1206 | ||
78c1f0a0 SH |
1207 | /* Start the hardware monitor if there is one. Otherwise (we're link |
1208 | * event driven), we have to poll the PHY because after an event queue | |
1209 | * flush, we could have a missed a link state change */ | |
1210 | if (efx->type->monitor != NULL) { | |
8ceee660 BH |
1211 | queue_delayed_work(efx->workqueue, &efx->monitor_work, |
1212 | efx_monitor_interval); | |
78c1f0a0 SH |
1213 | } else { |
1214 | mutex_lock(&efx->mac_lock); | |
1215 | if (efx->phy_op->poll(efx)) | |
1216 | efx_link_status_changed(efx); | |
1217 | mutex_unlock(&efx->mac_lock); | |
1218 | } | |
55edc6e6 | 1219 | |
ef2b90ee | 1220 | efx->type->start_stats(efx); |
8ceee660 BH |
1221 | } |
1222 | ||
1223 | /* Flush all delayed work. Should only be called when no more delayed work | |
1224 | * will be scheduled. This doesn't flush pending online resets (efx_reset), | |
1225 | * since we're holding the rtnl_lock at this point. */ | |
1226 | static void efx_flush_all(struct efx_nic *efx) | |
1227 | { | |
1228 | struct efx_rx_queue *rx_queue; | |
1229 | ||
1230 | /* Make sure the hardware monitor is stopped */ | |
1231 | cancel_delayed_work_sync(&efx->monitor_work); | |
1232 | ||
1233 | /* Ensure that all RX slow refills are complete. */ | |
b3475645 | 1234 | efx_for_each_rx_queue(rx_queue, efx) |
8ceee660 | 1235 | cancel_delayed_work_sync(&rx_queue->work); |
8ceee660 BH |
1236 | |
1237 | /* Stop scheduled port reconfigurations */ | |
766ca0fa | 1238 | cancel_work_sync(&efx->mac_work); |
8ceee660 BH |
1239 | } |
1240 | ||
1241 | /* Quiesce hardware and software without bringing the link down. | |
1242 | * Safe to call multiple times, when the nic and interface is in any | |
1243 | * state. The caller is guaranteed to subsequently be in a position | |
1244 | * to modify any hardware and software state they see fit without | |
1245 | * taking locks. */ | |
1246 | static void efx_stop_all(struct efx_nic *efx) | |
1247 | { | |
1248 | struct efx_channel *channel; | |
1249 | ||
1250 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1251 | ||
1252 | /* port_enabled can be read safely under the rtnl lock */ | |
1253 | if (!efx->port_enabled) | |
1254 | return; | |
1255 | ||
ef2b90ee | 1256 | efx->type->stop_stats(efx); |
55edc6e6 | 1257 | |
8880f4ec BH |
1258 | /* Switch to MCDI polling on Siena before disabling interrupts */ |
1259 | efx_mcdi_mode_poll(efx); | |
1260 | ||
8ceee660 | 1261 | /* Disable interrupts and wait for ISR to complete */ |
152b6a62 | 1262 | efx_nic_disable_interrupts(efx); |
8ceee660 BH |
1263 | if (efx->legacy_irq) |
1264 | synchronize_irq(efx->legacy_irq); | |
64ee3120 | 1265 | efx_for_each_channel(channel, efx) { |
8ceee660 BH |
1266 | if (channel->irq) |
1267 | synchronize_irq(channel->irq); | |
b3475645 | 1268 | } |
8ceee660 BH |
1269 | |
1270 | /* Stop all NAPI processing and synchronous rx refills */ | |
1271 | efx_for_each_channel(channel, efx) | |
1272 | efx_stop_channel(channel); | |
1273 | ||
1274 | /* Stop all asynchronous port reconfigurations. Since all | |
1275 | * event processing has already been stopped, there is no | |
1276 | * window to loose phy events */ | |
1277 | efx_stop_port(efx); | |
1278 | ||
fdaa9aed | 1279 | /* Flush efx_mac_work(), refill_workqueue, monitor_work */ |
8ceee660 BH |
1280 | efx_flush_all(efx); |
1281 | ||
8ceee660 BH |
1282 | /* Stop the kernel transmit interface late, so the watchdog |
1283 | * timer isn't ticking over the flush */ | |
55668611 | 1284 | if (efx_dev_registered(efx)) { |
dacccc74 | 1285 | efx_stop_queue(efx); |
8ceee660 BH |
1286 | netif_tx_lock_bh(efx->net_dev); |
1287 | netif_tx_unlock_bh(efx->net_dev); | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | static void efx_remove_all(struct efx_nic *efx) | |
1292 | { | |
1293 | struct efx_channel *channel; | |
1294 | ||
1295 | efx_for_each_channel(channel, efx) | |
1296 | efx_remove_channel(channel); | |
1297 | efx_remove_port(efx); | |
1298 | efx_remove_nic(efx); | |
1299 | } | |
1300 | ||
8ceee660 BH |
1301 | /************************************************************************** |
1302 | * | |
1303 | * Interrupt moderation | |
1304 | * | |
1305 | **************************************************************************/ | |
1306 | ||
0d86ebd8 BH |
1307 | static unsigned irq_mod_ticks(int usecs, int resolution) |
1308 | { | |
1309 | if (usecs <= 0) | |
1310 | return 0; /* cannot receive interrupts ahead of time :-) */ | |
1311 | if (usecs < resolution) | |
1312 | return 1; /* never round down to 0 */ | |
1313 | return usecs / resolution; | |
1314 | } | |
1315 | ||
8ceee660 | 1316 | /* Set interrupt moderation parameters */ |
6fb70fd1 BH |
1317 | void efx_init_irq_moderation(struct efx_nic *efx, int tx_usecs, int rx_usecs, |
1318 | bool rx_adaptive) | |
8ceee660 BH |
1319 | { |
1320 | struct efx_tx_queue *tx_queue; | |
1321 | struct efx_rx_queue *rx_queue; | |
152b6a62 BH |
1322 | unsigned tx_ticks = irq_mod_ticks(tx_usecs, EFX_IRQ_MOD_RESOLUTION); |
1323 | unsigned rx_ticks = irq_mod_ticks(rx_usecs, EFX_IRQ_MOD_RESOLUTION); | |
8ceee660 BH |
1324 | |
1325 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1326 | ||
1327 | efx_for_each_tx_queue(tx_queue, efx) | |
0d86ebd8 | 1328 | tx_queue->channel->irq_moderation = tx_ticks; |
8ceee660 | 1329 | |
6fb70fd1 | 1330 | efx->irq_rx_adaptive = rx_adaptive; |
0d86ebd8 | 1331 | efx->irq_rx_moderation = rx_ticks; |
8ceee660 | 1332 | efx_for_each_rx_queue(rx_queue, efx) |
0d86ebd8 | 1333 | rx_queue->channel->irq_moderation = rx_ticks; |
8ceee660 BH |
1334 | } |
1335 | ||
1336 | /************************************************************************** | |
1337 | * | |
1338 | * Hardware monitor | |
1339 | * | |
1340 | **************************************************************************/ | |
1341 | ||
1342 | /* Run periodically off the general workqueue. Serialised against | |
1343 | * efx_reconfigure_port via the mac_lock */ | |
1344 | static void efx_monitor(struct work_struct *data) | |
1345 | { | |
1346 | struct efx_nic *efx = container_of(data, struct efx_nic, | |
1347 | monitor_work.work); | |
8ceee660 BH |
1348 | |
1349 | EFX_TRACE(efx, "hardware monitor executing on CPU %d\n", | |
1350 | raw_smp_processor_id()); | |
ef2b90ee | 1351 | BUG_ON(efx->type->monitor == NULL); |
8ceee660 | 1352 | |
8ceee660 BH |
1353 | /* If the mac_lock is already held then it is likely a port |
1354 | * reconfiguration is already in place, which will likely do | |
1355 | * most of the work of check_hw() anyway. */ | |
766ca0fa BH |
1356 | if (!mutex_trylock(&efx->mac_lock)) |
1357 | goto out_requeue; | |
1358 | if (!efx->port_enabled) | |
1359 | goto out_unlock; | |
ef2b90ee | 1360 | efx->type->monitor(efx); |
8ceee660 | 1361 | |
766ca0fa | 1362 | out_unlock: |
8ceee660 | 1363 | mutex_unlock(&efx->mac_lock); |
766ca0fa | 1364 | out_requeue: |
8ceee660 BH |
1365 | queue_delayed_work(efx->workqueue, &efx->monitor_work, |
1366 | efx_monitor_interval); | |
1367 | } | |
1368 | ||
1369 | /************************************************************************** | |
1370 | * | |
1371 | * ioctls | |
1372 | * | |
1373 | *************************************************************************/ | |
1374 | ||
1375 | /* Net device ioctl | |
1376 | * Context: process, rtnl_lock() held. | |
1377 | */ | |
1378 | static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) | |
1379 | { | |
767e468c | 1380 | struct efx_nic *efx = netdev_priv(net_dev); |
68e7f45e | 1381 | struct mii_ioctl_data *data = if_mii(ifr); |
8ceee660 BH |
1382 | |
1383 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1384 | ||
68e7f45e BH |
1385 | /* Convert phy_id from older PRTAD/DEVAD format */ |
1386 | if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && | |
1387 | (data->phy_id & 0xfc00) == 0x0400) | |
1388 | data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; | |
1389 | ||
1390 | return mdio_mii_ioctl(&efx->mdio, data, cmd); | |
8ceee660 BH |
1391 | } |
1392 | ||
1393 | /************************************************************************** | |
1394 | * | |
1395 | * NAPI interface | |
1396 | * | |
1397 | **************************************************************************/ | |
1398 | ||
1399 | static int efx_init_napi(struct efx_nic *efx) | |
1400 | { | |
1401 | struct efx_channel *channel; | |
8ceee660 BH |
1402 | |
1403 | efx_for_each_channel(channel, efx) { | |
1404 | channel->napi_dev = efx->net_dev; | |
718cff1e BH |
1405 | netif_napi_add(channel->napi_dev, &channel->napi_str, |
1406 | efx_poll, napi_weight); | |
8ceee660 BH |
1407 | } |
1408 | return 0; | |
8ceee660 BH |
1409 | } |
1410 | ||
1411 | static void efx_fini_napi(struct efx_nic *efx) | |
1412 | { | |
1413 | struct efx_channel *channel; | |
1414 | ||
1415 | efx_for_each_channel(channel, efx) { | |
718cff1e BH |
1416 | if (channel->napi_dev) |
1417 | netif_napi_del(&channel->napi_str); | |
8ceee660 BH |
1418 | channel->napi_dev = NULL; |
1419 | } | |
1420 | } | |
1421 | ||
1422 | /************************************************************************** | |
1423 | * | |
1424 | * Kernel netpoll interface | |
1425 | * | |
1426 | *************************************************************************/ | |
1427 | ||
1428 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1429 | ||
1430 | /* Although in the common case interrupts will be disabled, this is not | |
1431 | * guaranteed. However, all our work happens inside the NAPI callback, | |
1432 | * so no locking is required. | |
1433 | */ | |
1434 | static void efx_netpoll(struct net_device *net_dev) | |
1435 | { | |
767e468c | 1436 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1437 | struct efx_channel *channel; |
1438 | ||
64ee3120 | 1439 | efx_for_each_channel(channel, efx) |
8ceee660 BH |
1440 | efx_schedule_channel(channel); |
1441 | } | |
1442 | ||
1443 | #endif | |
1444 | ||
1445 | /************************************************************************** | |
1446 | * | |
1447 | * Kernel net device interface | |
1448 | * | |
1449 | *************************************************************************/ | |
1450 | ||
1451 | /* Context: process, rtnl_lock() held. */ | |
1452 | static int efx_net_open(struct net_device *net_dev) | |
1453 | { | |
767e468c | 1454 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1455 | EFX_ASSERT_RESET_SERIALISED(efx); |
1456 | ||
1457 | EFX_LOG(efx, "opening device %s on CPU %d\n", net_dev->name, | |
1458 | raw_smp_processor_id()); | |
1459 | ||
f4bd954e BH |
1460 | if (efx->state == STATE_DISABLED) |
1461 | return -EIO; | |
f8b87c17 BH |
1462 | if (efx->phy_mode & PHY_MODE_SPECIAL) |
1463 | return -EBUSY; | |
8880f4ec BH |
1464 | if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) |
1465 | return -EIO; | |
f8b87c17 | 1466 | |
78c1f0a0 SH |
1467 | /* Notify the kernel of the link state polled during driver load, |
1468 | * before the monitor starts running */ | |
1469 | efx_link_status_changed(efx); | |
1470 | ||
8ceee660 BH |
1471 | efx_start_all(efx); |
1472 | return 0; | |
1473 | } | |
1474 | ||
1475 | /* Context: process, rtnl_lock() held. | |
1476 | * Note that the kernel will ignore our return code; this method | |
1477 | * should really be a void. | |
1478 | */ | |
1479 | static int efx_net_stop(struct net_device *net_dev) | |
1480 | { | |
767e468c | 1481 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1482 | |
1483 | EFX_LOG(efx, "closing %s on CPU %d\n", net_dev->name, | |
1484 | raw_smp_processor_id()); | |
1485 | ||
f4bd954e BH |
1486 | if (efx->state != STATE_DISABLED) { |
1487 | /* Stop the device and flush all the channels */ | |
1488 | efx_stop_all(efx); | |
1489 | efx_fini_channels(efx); | |
1490 | efx_init_channels(efx); | |
1491 | } | |
8ceee660 BH |
1492 | |
1493 | return 0; | |
1494 | } | |
1495 | ||
5b9e207c | 1496 | /* Context: process, dev_base_lock or RTNL held, non-blocking. */ |
8ceee660 BH |
1497 | static struct net_device_stats *efx_net_stats(struct net_device *net_dev) |
1498 | { | |
767e468c | 1499 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1500 | struct efx_mac_stats *mac_stats = &efx->mac_stats; |
1501 | struct net_device_stats *stats = &net_dev->stats; | |
1502 | ||
55edc6e6 | 1503 | spin_lock_bh(&efx->stats_lock); |
ef2b90ee | 1504 | efx->type->update_stats(efx); |
55edc6e6 | 1505 | spin_unlock_bh(&efx->stats_lock); |
8ceee660 BH |
1506 | |
1507 | stats->rx_packets = mac_stats->rx_packets; | |
1508 | stats->tx_packets = mac_stats->tx_packets; | |
1509 | stats->rx_bytes = mac_stats->rx_bytes; | |
1510 | stats->tx_bytes = mac_stats->tx_bytes; | |
1511 | stats->multicast = mac_stats->rx_multicast; | |
1512 | stats->collisions = mac_stats->tx_collision; | |
1513 | stats->rx_length_errors = (mac_stats->rx_gtjumbo + | |
1514 | mac_stats->rx_length_error); | |
1515 | stats->rx_over_errors = efx->n_rx_nodesc_drop_cnt; | |
1516 | stats->rx_crc_errors = mac_stats->rx_bad; | |
1517 | stats->rx_frame_errors = mac_stats->rx_align_error; | |
1518 | stats->rx_fifo_errors = mac_stats->rx_overflow; | |
1519 | stats->rx_missed_errors = mac_stats->rx_missed; | |
1520 | stats->tx_window_errors = mac_stats->tx_late_collision; | |
1521 | ||
1522 | stats->rx_errors = (stats->rx_length_errors + | |
1523 | stats->rx_over_errors + | |
1524 | stats->rx_crc_errors + | |
1525 | stats->rx_frame_errors + | |
1526 | stats->rx_fifo_errors + | |
1527 | stats->rx_missed_errors + | |
1528 | mac_stats->rx_symbol_error); | |
1529 | stats->tx_errors = (stats->tx_window_errors + | |
1530 | mac_stats->tx_bad); | |
1531 | ||
1532 | return stats; | |
1533 | } | |
1534 | ||
1535 | /* Context: netif_tx_lock held, BHs disabled. */ | |
1536 | static void efx_watchdog(struct net_device *net_dev) | |
1537 | { | |
767e468c | 1538 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 | 1539 | |
739bb23d BH |
1540 | EFX_ERR(efx, "TX stuck with stop_count=%d port_enabled=%d:" |
1541 | " resetting channels\n", | |
1542 | atomic_read(&efx->netif_stop_count), efx->port_enabled); | |
8ceee660 | 1543 | |
739bb23d | 1544 | efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); |
8ceee660 BH |
1545 | } |
1546 | ||
1547 | ||
1548 | /* Context: process, rtnl_lock() held. */ | |
1549 | static int efx_change_mtu(struct net_device *net_dev, int new_mtu) | |
1550 | { | |
767e468c | 1551 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1552 | int rc = 0; |
1553 | ||
1554 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1555 | ||
1556 | if (new_mtu > EFX_MAX_MTU) | |
1557 | return -EINVAL; | |
1558 | ||
1559 | efx_stop_all(efx); | |
1560 | ||
1561 | EFX_LOG(efx, "changing MTU to %d\n", new_mtu); | |
1562 | ||
1563 | efx_fini_channels(efx); | |
d3245b28 BH |
1564 | |
1565 | mutex_lock(&efx->mac_lock); | |
1566 | /* Reconfigure the MAC before enabling the dma queues so that | |
1567 | * the RX buffers don't overflow */ | |
8ceee660 | 1568 | net_dev->mtu = new_mtu; |
d3245b28 BH |
1569 | efx->mac_op->reconfigure(efx); |
1570 | mutex_unlock(&efx->mac_lock); | |
1571 | ||
bc3c90a2 | 1572 | efx_init_channels(efx); |
8ceee660 BH |
1573 | |
1574 | efx_start_all(efx); | |
1575 | return rc; | |
8ceee660 BH |
1576 | } |
1577 | ||
1578 | static int efx_set_mac_address(struct net_device *net_dev, void *data) | |
1579 | { | |
767e468c | 1580 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1581 | struct sockaddr *addr = data; |
1582 | char *new_addr = addr->sa_data; | |
1583 | ||
1584 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1585 | ||
1586 | if (!is_valid_ether_addr(new_addr)) { | |
e174961c JB |
1587 | EFX_ERR(efx, "invalid ethernet MAC address requested: %pM\n", |
1588 | new_addr); | |
8ceee660 BH |
1589 | return -EINVAL; |
1590 | } | |
1591 | ||
1592 | memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len); | |
1593 | ||
1594 | /* Reconfigure the MAC */ | |
d3245b28 BH |
1595 | mutex_lock(&efx->mac_lock); |
1596 | efx->mac_op->reconfigure(efx); | |
1597 | mutex_unlock(&efx->mac_lock); | |
8ceee660 BH |
1598 | |
1599 | return 0; | |
1600 | } | |
1601 | ||
a816f75a | 1602 | /* Context: netif_addr_lock held, BHs disabled. */ |
8ceee660 BH |
1603 | static void efx_set_multicast_list(struct net_device *net_dev) |
1604 | { | |
767e468c | 1605 | struct efx_nic *efx = netdev_priv(net_dev); |
5508590c | 1606 | struct dev_mc_list *mc_list; |
8ceee660 | 1607 | union efx_multicast_hash *mc_hash = &efx->multicast_hash; |
8ceee660 BH |
1608 | u32 crc; |
1609 | int bit; | |
8ceee660 | 1610 | |
8be4f3e6 | 1611 | efx->promiscuous = !!(net_dev->flags & IFF_PROMISC); |
8ceee660 BH |
1612 | |
1613 | /* Build multicast hash table */ | |
8be4f3e6 | 1614 | if (efx->promiscuous || (net_dev->flags & IFF_ALLMULTI)) { |
8ceee660 BH |
1615 | memset(mc_hash, 0xff, sizeof(*mc_hash)); |
1616 | } else { | |
1617 | memset(mc_hash, 0x00, sizeof(*mc_hash)); | |
5508590c | 1618 | netdev_for_each_mc_addr(mc_list, net_dev) { |
8ceee660 BH |
1619 | crc = ether_crc_le(ETH_ALEN, mc_list->dmi_addr); |
1620 | bit = crc & (EFX_MCAST_HASH_ENTRIES - 1); | |
1621 | set_bit_le(bit, mc_hash->byte); | |
8ceee660 | 1622 | } |
8ceee660 | 1623 | |
8be4f3e6 BH |
1624 | /* Broadcast packets go through the multicast hash filter. |
1625 | * ether_crc_le() of the broadcast address is 0xbe2612ff | |
1626 | * so we always add bit 0xff to the mask. | |
1627 | */ | |
1628 | set_bit_le(0xff, mc_hash->byte); | |
1629 | } | |
a816f75a | 1630 | |
8be4f3e6 BH |
1631 | if (efx->port_enabled) |
1632 | queue_work(efx->workqueue, &efx->mac_work); | |
1633 | /* Otherwise efx_start_port() will do this */ | |
8ceee660 BH |
1634 | } |
1635 | ||
c3ecb9f3 SH |
1636 | static const struct net_device_ops efx_netdev_ops = { |
1637 | .ndo_open = efx_net_open, | |
1638 | .ndo_stop = efx_net_stop, | |
1639 | .ndo_get_stats = efx_net_stats, | |
1640 | .ndo_tx_timeout = efx_watchdog, | |
1641 | .ndo_start_xmit = efx_hard_start_xmit, | |
1642 | .ndo_validate_addr = eth_validate_addr, | |
1643 | .ndo_do_ioctl = efx_ioctl, | |
1644 | .ndo_change_mtu = efx_change_mtu, | |
1645 | .ndo_set_mac_address = efx_set_mac_address, | |
1646 | .ndo_set_multicast_list = efx_set_multicast_list, | |
1647 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1648 | .ndo_poll_controller = efx_netpoll, | |
1649 | #endif | |
1650 | }; | |
1651 | ||
7dde596e BH |
1652 | static void efx_update_name(struct efx_nic *efx) |
1653 | { | |
1654 | strcpy(efx->name, efx->net_dev->name); | |
1655 | efx_mtd_rename(efx); | |
1656 | efx_set_channel_names(efx); | |
1657 | } | |
1658 | ||
8ceee660 BH |
1659 | static int efx_netdev_event(struct notifier_block *this, |
1660 | unsigned long event, void *ptr) | |
1661 | { | |
d3208b5e | 1662 | struct net_device *net_dev = ptr; |
8ceee660 | 1663 | |
7dde596e BH |
1664 | if (net_dev->netdev_ops == &efx_netdev_ops && |
1665 | event == NETDEV_CHANGENAME) | |
1666 | efx_update_name(netdev_priv(net_dev)); | |
8ceee660 BH |
1667 | |
1668 | return NOTIFY_DONE; | |
1669 | } | |
1670 | ||
1671 | static struct notifier_block efx_netdev_notifier = { | |
1672 | .notifier_call = efx_netdev_event, | |
1673 | }; | |
1674 | ||
06d5e193 BH |
1675 | static ssize_t |
1676 | show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) | |
1677 | { | |
1678 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
1679 | return sprintf(buf, "%d\n", efx->phy_type); | |
1680 | } | |
1681 | static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL); | |
1682 | ||
8ceee660 BH |
1683 | static int efx_register_netdev(struct efx_nic *efx) |
1684 | { | |
1685 | struct net_device *net_dev = efx->net_dev; | |
1686 | int rc; | |
1687 | ||
1688 | net_dev->watchdog_timeo = 5 * HZ; | |
1689 | net_dev->irq = efx->pci_dev->irq; | |
c3ecb9f3 | 1690 | net_dev->netdev_ops = &efx_netdev_ops; |
8ceee660 BH |
1691 | SET_NETDEV_DEV(net_dev, &efx->pci_dev->dev); |
1692 | SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops); | |
1693 | ||
8ceee660 | 1694 | /* Clear MAC statistics */ |
177dfcd8 | 1695 | efx->mac_op->update_stats(efx); |
8ceee660 BH |
1696 | memset(&efx->mac_stats, 0, sizeof(efx->mac_stats)); |
1697 | ||
7dde596e | 1698 | rtnl_lock(); |
aed0628d BH |
1699 | |
1700 | rc = dev_alloc_name(net_dev, net_dev->name); | |
1701 | if (rc < 0) | |
1702 | goto fail_locked; | |
7dde596e | 1703 | efx_update_name(efx); |
aed0628d BH |
1704 | |
1705 | rc = register_netdevice(net_dev); | |
1706 | if (rc) | |
1707 | goto fail_locked; | |
1708 | ||
1709 | /* Always start with carrier off; PHY events will detect the link */ | |
1710 | netif_carrier_off(efx->net_dev); | |
1711 | ||
7dde596e | 1712 | rtnl_unlock(); |
8ceee660 | 1713 | |
06d5e193 BH |
1714 | rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); |
1715 | if (rc) { | |
1716 | EFX_ERR(efx, "failed to init net dev attributes\n"); | |
1717 | goto fail_registered; | |
1718 | } | |
1719 | ||
8ceee660 | 1720 | return 0; |
06d5e193 | 1721 | |
aed0628d BH |
1722 | fail_locked: |
1723 | rtnl_unlock(); | |
1724 | EFX_ERR(efx, "could not register net dev\n"); | |
1725 | return rc; | |
1726 | ||
06d5e193 BH |
1727 | fail_registered: |
1728 | unregister_netdev(net_dev); | |
1729 | return rc; | |
8ceee660 BH |
1730 | } |
1731 | ||
1732 | static void efx_unregister_netdev(struct efx_nic *efx) | |
1733 | { | |
1734 | struct efx_tx_queue *tx_queue; | |
1735 | ||
1736 | if (!efx->net_dev) | |
1737 | return; | |
1738 | ||
767e468c | 1739 | BUG_ON(netdev_priv(efx->net_dev) != efx); |
8ceee660 BH |
1740 | |
1741 | /* Free up any skbs still remaining. This has to happen before | |
1742 | * we try to unregister the netdev as running their destructors | |
1743 | * may be needed to get the device ref. count to 0. */ | |
1744 | efx_for_each_tx_queue(tx_queue, efx) | |
1745 | efx_release_tx_buffers(tx_queue); | |
1746 | ||
55668611 | 1747 | if (efx_dev_registered(efx)) { |
8ceee660 | 1748 | strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); |
06d5e193 | 1749 | device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); |
8ceee660 BH |
1750 | unregister_netdev(efx->net_dev); |
1751 | } | |
1752 | } | |
1753 | ||
1754 | /************************************************************************** | |
1755 | * | |
1756 | * Device reset and suspend | |
1757 | * | |
1758 | **************************************************************************/ | |
1759 | ||
2467ca46 BH |
1760 | /* Tears down the entire software state and most of the hardware state |
1761 | * before reset. */ | |
d3245b28 | 1762 | void efx_reset_down(struct efx_nic *efx, enum reset_type method) |
8ceee660 | 1763 | { |
8ceee660 BH |
1764 | EFX_ASSERT_RESET_SERIALISED(efx); |
1765 | ||
2467ca46 BH |
1766 | efx_stop_all(efx); |
1767 | mutex_lock(&efx->mac_lock); | |
f4150724 | 1768 | mutex_lock(&efx->spi_lock); |
2467ca46 | 1769 | |
8ceee660 | 1770 | efx_fini_channels(efx); |
4b988280 SH |
1771 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) |
1772 | efx->phy_op->fini(efx); | |
ef2b90ee | 1773 | efx->type->fini(efx); |
8ceee660 BH |
1774 | } |
1775 | ||
2467ca46 BH |
1776 | /* This function will always ensure that the locks acquired in |
1777 | * efx_reset_down() are released. A failure return code indicates | |
1778 | * that we were unable to reinitialise the hardware, and the | |
1779 | * driver should be disabled. If ok is false, then the rx and tx | |
1780 | * engines are not restarted, pending a RESET_DISABLE. */ | |
d3245b28 | 1781 | int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) |
8ceee660 BH |
1782 | { |
1783 | int rc; | |
1784 | ||
2467ca46 | 1785 | EFX_ASSERT_RESET_SERIALISED(efx); |
8ceee660 | 1786 | |
ef2b90ee | 1787 | rc = efx->type->init(efx); |
8ceee660 | 1788 | if (rc) { |
2467ca46 | 1789 | EFX_ERR(efx, "failed to initialise NIC\n"); |
eb9f6744 | 1790 | goto fail; |
8ceee660 BH |
1791 | } |
1792 | ||
eb9f6744 BH |
1793 | if (!ok) |
1794 | goto fail; | |
1795 | ||
4b988280 | 1796 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { |
eb9f6744 BH |
1797 | rc = efx->phy_op->init(efx); |
1798 | if (rc) | |
1799 | goto fail; | |
1800 | if (efx->phy_op->reconfigure(efx)) | |
1801 | EFX_ERR(efx, "could not restore PHY settings\n"); | |
4b988280 SH |
1802 | } |
1803 | ||
eb9f6744 | 1804 | efx->mac_op->reconfigure(efx); |
8ceee660 | 1805 | |
eb9f6744 BH |
1806 | efx_init_channels(efx); |
1807 | ||
1808 | mutex_unlock(&efx->spi_lock); | |
1809 | mutex_unlock(&efx->mac_lock); | |
1810 | ||
1811 | efx_start_all(efx); | |
1812 | ||
1813 | return 0; | |
1814 | ||
1815 | fail: | |
1816 | efx->port_initialized = false; | |
2467ca46 | 1817 | |
f4150724 | 1818 | mutex_unlock(&efx->spi_lock); |
2467ca46 BH |
1819 | mutex_unlock(&efx->mac_lock); |
1820 | ||
8ceee660 BH |
1821 | return rc; |
1822 | } | |
1823 | ||
eb9f6744 BH |
1824 | /* Reset the NIC using the specified method. Note that the reset may |
1825 | * fail, in which case the card will be left in an unusable state. | |
8ceee660 | 1826 | * |
eb9f6744 | 1827 | * Caller must hold the rtnl_lock. |
8ceee660 | 1828 | */ |
eb9f6744 | 1829 | int efx_reset(struct efx_nic *efx, enum reset_type method) |
8ceee660 | 1830 | { |
eb9f6744 BH |
1831 | int rc, rc2; |
1832 | bool disabled; | |
8ceee660 | 1833 | |
c459302d | 1834 | EFX_INFO(efx, "resetting (%s)\n", RESET_TYPE(method)); |
8ceee660 | 1835 | |
d3245b28 | 1836 | efx_reset_down(efx, method); |
8ceee660 | 1837 | |
ef2b90ee | 1838 | rc = efx->type->reset(efx, method); |
8ceee660 BH |
1839 | if (rc) { |
1840 | EFX_ERR(efx, "failed to reset hardware\n"); | |
eb9f6744 | 1841 | goto out; |
8ceee660 BH |
1842 | } |
1843 | ||
1844 | /* Allow resets to be rescheduled. */ | |
1845 | efx->reset_pending = RESET_TYPE_NONE; | |
1846 | ||
1847 | /* Reinitialise bus-mastering, which may have been turned off before | |
1848 | * the reset was scheduled. This is still appropriate, even in the | |
1849 | * RESET_TYPE_DISABLE since this driver generally assumes the hardware | |
1850 | * can respond to requests. */ | |
1851 | pci_set_master(efx->pci_dev); | |
1852 | ||
eb9f6744 | 1853 | out: |
8ceee660 | 1854 | /* Leave device stopped if necessary */ |
eb9f6744 BH |
1855 | disabled = rc || method == RESET_TYPE_DISABLE; |
1856 | rc2 = efx_reset_up(efx, method, !disabled); | |
1857 | if (rc2) { | |
1858 | disabled = true; | |
1859 | if (!rc) | |
1860 | rc = rc2; | |
8ceee660 BH |
1861 | } |
1862 | ||
eb9f6744 | 1863 | if (disabled) { |
f4bd954e BH |
1864 | EFX_ERR(efx, "has been disabled\n"); |
1865 | efx->state = STATE_DISABLED; | |
f4bd954e BH |
1866 | } else { |
1867 | EFX_LOG(efx, "reset complete\n"); | |
1868 | } | |
8ceee660 BH |
1869 | return rc; |
1870 | } | |
1871 | ||
1872 | /* The worker thread exists so that code that cannot sleep can | |
1873 | * schedule a reset for later. | |
1874 | */ | |
1875 | static void efx_reset_work(struct work_struct *data) | |
1876 | { | |
eb9f6744 | 1877 | struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); |
8ceee660 | 1878 | |
eb9f6744 BH |
1879 | /* If we're not RUNNING then don't reset. Leave the reset_pending |
1880 | * flag set so that efx_pci_probe_main will be retried */ | |
1881 | if (efx->state != STATE_RUNNING) { | |
1882 | EFX_INFO(efx, "scheduled reset quenched. NIC not RUNNING\n"); | |
1883 | return; | |
1884 | } | |
1885 | ||
1886 | rtnl_lock(); | |
1887 | if (efx_reset(efx, efx->reset_pending)) | |
1888 | dev_close(efx->net_dev); | |
1889 | rtnl_unlock(); | |
8ceee660 BH |
1890 | } |
1891 | ||
1892 | void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) | |
1893 | { | |
1894 | enum reset_type method; | |
1895 | ||
1896 | if (efx->reset_pending != RESET_TYPE_NONE) { | |
1897 | EFX_INFO(efx, "quenching already scheduled reset\n"); | |
1898 | return; | |
1899 | } | |
1900 | ||
1901 | switch (type) { | |
1902 | case RESET_TYPE_INVISIBLE: | |
1903 | case RESET_TYPE_ALL: | |
1904 | case RESET_TYPE_WORLD: | |
1905 | case RESET_TYPE_DISABLE: | |
1906 | method = type; | |
1907 | break; | |
1908 | case RESET_TYPE_RX_RECOVERY: | |
1909 | case RESET_TYPE_RX_DESC_FETCH: | |
1910 | case RESET_TYPE_TX_DESC_FETCH: | |
1911 | case RESET_TYPE_TX_SKIP: | |
1912 | method = RESET_TYPE_INVISIBLE; | |
1913 | break; | |
8880f4ec | 1914 | case RESET_TYPE_MC_FAILURE: |
8ceee660 BH |
1915 | default: |
1916 | method = RESET_TYPE_ALL; | |
1917 | break; | |
1918 | } | |
1919 | ||
1920 | if (method != type) | |
c459302d BH |
1921 | EFX_LOG(efx, "scheduling %s reset for %s\n", |
1922 | RESET_TYPE(method), RESET_TYPE(type)); | |
8ceee660 | 1923 | else |
c459302d | 1924 | EFX_LOG(efx, "scheduling %s reset\n", RESET_TYPE(method)); |
8ceee660 BH |
1925 | |
1926 | efx->reset_pending = method; | |
1927 | ||
8880f4ec BH |
1928 | /* efx_process_channel() will no longer read events once a |
1929 | * reset is scheduled. So switch back to poll'd MCDI completions. */ | |
1930 | efx_mcdi_mode_poll(efx); | |
1931 | ||
1ab00629 | 1932 | queue_work(reset_workqueue, &efx->reset_work); |
8ceee660 BH |
1933 | } |
1934 | ||
1935 | /************************************************************************** | |
1936 | * | |
1937 | * List of NICs we support | |
1938 | * | |
1939 | **************************************************************************/ | |
1940 | ||
1941 | /* PCI device ID table */ | |
a3aa1884 | 1942 | static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = { |
8ceee660 | 1943 | {PCI_DEVICE(EFX_VENDID_SFC, FALCON_A_P_DEVID), |
daeda630 | 1944 | .driver_data = (unsigned long) &falcon_a1_nic_type}, |
8ceee660 | 1945 | {PCI_DEVICE(EFX_VENDID_SFC, FALCON_B_P_DEVID), |
daeda630 | 1946 | .driver_data = (unsigned long) &falcon_b0_nic_type}, |
8880f4ec BH |
1947 | {PCI_DEVICE(EFX_VENDID_SFC, BETHPAGE_A_P_DEVID), |
1948 | .driver_data = (unsigned long) &siena_a0_nic_type}, | |
1949 | {PCI_DEVICE(EFX_VENDID_SFC, SIENA_A_P_DEVID), | |
1950 | .driver_data = (unsigned long) &siena_a0_nic_type}, | |
8ceee660 BH |
1951 | {0} /* end of list */ |
1952 | }; | |
1953 | ||
1954 | /************************************************************************** | |
1955 | * | |
3759433d | 1956 | * Dummy PHY/MAC operations |
8ceee660 | 1957 | * |
01aad7b6 | 1958 | * Can be used for some unimplemented operations |
8ceee660 BH |
1959 | * Needed so all function pointers are valid and do not have to be tested |
1960 | * before use | |
1961 | * | |
1962 | **************************************************************************/ | |
1963 | int efx_port_dummy_op_int(struct efx_nic *efx) | |
1964 | { | |
1965 | return 0; | |
1966 | } | |
1967 | void efx_port_dummy_op_void(struct efx_nic *efx) {} | |
398468ed BH |
1968 | void efx_port_dummy_op_set_id_led(struct efx_nic *efx, enum efx_led_mode mode) |
1969 | { | |
1970 | } | |
fdaa9aed SH |
1971 | bool efx_port_dummy_op_poll(struct efx_nic *efx) |
1972 | { | |
1973 | return false; | |
1974 | } | |
8ceee660 BH |
1975 | |
1976 | static struct efx_phy_operations efx_dummy_phy_operations = { | |
1977 | .init = efx_port_dummy_op_int, | |
d3245b28 | 1978 | .reconfigure = efx_port_dummy_op_int, |
fdaa9aed | 1979 | .poll = efx_port_dummy_op_poll, |
8ceee660 | 1980 | .fini = efx_port_dummy_op_void, |
8ceee660 BH |
1981 | }; |
1982 | ||
8ceee660 BH |
1983 | /************************************************************************** |
1984 | * | |
1985 | * Data housekeeping | |
1986 | * | |
1987 | **************************************************************************/ | |
1988 | ||
1989 | /* This zeroes out and then fills in the invariants in a struct | |
1990 | * efx_nic (including all sub-structures). | |
1991 | */ | |
1992 | static int efx_init_struct(struct efx_nic *efx, struct efx_nic_type *type, | |
1993 | struct pci_dev *pci_dev, struct net_device *net_dev) | |
1994 | { | |
1995 | struct efx_channel *channel; | |
1996 | struct efx_tx_queue *tx_queue; | |
1997 | struct efx_rx_queue *rx_queue; | |
1ab00629 | 1998 | int i; |
8ceee660 BH |
1999 | |
2000 | /* Initialise common structures */ | |
2001 | memset(efx, 0, sizeof(*efx)); | |
2002 | spin_lock_init(&efx->biu_lock); | |
ab867461 | 2003 | mutex_init(&efx->mdio_lock); |
f4150724 | 2004 | mutex_init(&efx->spi_lock); |
76884835 BH |
2005 | #ifdef CONFIG_SFC_MTD |
2006 | INIT_LIST_HEAD(&efx->mtd_list); | |
2007 | #endif | |
8ceee660 BH |
2008 | INIT_WORK(&efx->reset_work, efx_reset_work); |
2009 | INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); | |
2010 | efx->pci_dev = pci_dev; | |
2011 | efx->state = STATE_INIT; | |
2012 | efx->reset_pending = RESET_TYPE_NONE; | |
2013 | strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); | |
8ceee660 BH |
2014 | |
2015 | efx->net_dev = net_dev; | |
dc8cfa55 | 2016 | efx->rx_checksum_enabled = true; |
8ceee660 BH |
2017 | spin_lock_init(&efx->netif_stop_lock); |
2018 | spin_lock_init(&efx->stats_lock); | |
2019 | mutex_init(&efx->mac_lock); | |
b895d73e | 2020 | efx->mac_op = type->default_mac_ops; |
8ceee660 | 2021 | efx->phy_op = &efx_dummy_phy_operations; |
68e7f45e | 2022 | efx->mdio.dev = net_dev; |
766ca0fa | 2023 | INIT_WORK(&efx->mac_work, efx_mac_work); |
8ceee660 BH |
2024 | atomic_set(&efx->netif_stop_count, 1); |
2025 | ||
2026 | for (i = 0; i < EFX_MAX_CHANNELS; i++) { | |
2027 | channel = &efx->channel[i]; | |
2028 | channel->efx = efx; | |
2029 | channel->channel = i; | |
dc8cfa55 | 2030 | channel->work_pending = false; |
8ceee660 | 2031 | } |
60ac1065 | 2032 | for (i = 0; i < EFX_TX_QUEUE_COUNT; i++) { |
8ceee660 BH |
2033 | tx_queue = &efx->tx_queue[i]; |
2034 | tx_queue->efx = efx; | |
2035 | tx_queue->queue = i; | |
2036 | tx_queue->buffer = NULL; | |
2037 | tx_queue->channel = &efx->channel[0]; /* for safety */ | |
b9b39b62 | 2038 | tx_queue->tso_headers_free = NULL; |
8ceee660 BH |
2039 | } |
2040 | for (i = 0; i < EFX_MAX_RX_QUEUES; i++) { | |
2041 | rx_queue = &efx->rx_queue[i]; | |
2042 | rx_queue->efx = efx; | |
2043 | rx_queue->queue = i; | |
2044 | rx_queue->channel = &efx->channel[0]; /* for safety */ | |
2045 | rx_queue->buffer = NULL; | |
2046 | spin_lock_init(&rx_queue->add_lock); | |
2047 | INIT_DELAYED_WORK(&rx_queue->work, efx_rx_work); | |
2048 | } | |
2049 | ||
2050 | efx->type = type; | |
2051 | ||
8ceee660 | 2052 | /* As close as we can get to guaranteeing that we don't overflow */ |
3ffeabdd BH |
2053 | BUILD_BUG_ON(EFX_EVQ_SIZE < EFX_TXQ_SIZE + EFX_RXQ_SIZE); |
2054 | ||
8ceee660 BH |
2055 | EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS); |
2056 | ||
2057 | /* Higher numbered interrupt modes are less capable! */ | |
2058 | efx->interrupt_mode = max(efx->type->max_interrupt_mode, | |
2059 | interrupt_mode); | |
2060 | ||
6977dc63 BH |
2061 | /* Would be good to use the net_dev name, but we're too early */ |
2062 | snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", | |
2063 | pci_name(pci_dev)); | |
2064 | efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); | |
1ab00629 SH |
2065 | if (!efx->workqueue) |
2066 | return -ENOMEM; | |
8d9853d9 | 2067 | |
8ceee660 | 2068 | return 0; |
8ceee660 BH |
2069 | } |
2070 | ||
2071 | static void efx_fini_struct(struct efx_nic *efx) | |
2072 | { | |
2073 | if (efx->workqueue) { | |
2074 | destroy_workqueue(efx->workqueue); | |
2075 | efx->workqueue = NULL; | |
2076 | } | |
2077 | } | |
2078 | ||
2079 | /************************************************************************** | |
2080 | * | |
2081 | * PCI interface | |
2082 | * | |
2083 | **************************************************************************/ | |
2084 | ||
2085 | /* Main body of final NIC shutdown code | |
2086 | * This is called only at module unload (or hotplug removal). | |
2087 | */ | |
2088 | static void efx_pci_remove_main(struct efx_nic *efx) | |
2089 | { | |
152b6a62 | 2090 | efx_nic_fini_interrupt(efx); |
8ceee660 BH |
2091 | efx_fini_channels(efx); |
2092 | efx_fini_port(efx); | |
ef2b90ee | 2093 | efx->type->fini(efx); |
8ceee660 BH |
2094 | efx_fini_napi(efx); |
2095 | efx_remove_all(efx); | |
2096 | } | |
2097 | ||
2098 | /* Final NIC shutdown | |
2099 | * This is called only at module unload (or hotplug removal). | |
2100 | */ | |
2101 | static void efx_pci_remove(struct pci_dev *pci_dev) | |
2102 | { | |
2103 | struct efx_nic *efx; | |
2104 | ||
2105 | efx = pci_get_drvdata(pci_dev); | |
2106 | if (!efx) | |
2107 | return; | |
2108 | ||
2109 | /* Mark the NIC as fini, then stop the interface */ | |
2110 | rtnl_lock(); | |
2111 | efx->state = STATE_FINI; | |
2112 | dev_close(efx->net_dev); | |
2113 | ||
2114 | /* Allow any queued efx_resets() to complete */ | |
2115 | rtnl_unlock(); | |
2116 | ||
8ceee660 BH |
2117 | efx_unregister_netdev(efx); |
2118 | ||
7dde596e BH |
2119 | efx_mtd_remove(efx); |
2120 | ||
8ceee660 BH |
2121 | /* Wait for any scheduled resets to complete. No more will be |
2122 | * scheduled from this point because efx_stop_all() has been | |
2123 | * called, we are no longer registered with driverlink, and | |
2124 | * the net_device's have been removed. */ | |
1ab00629 | 2125 | cancel_work_sync(&efx->reset_work); |
8ceee660 BH |
2126 | |
2127 | efx_pci_remove_main(efx); | |
2128 | ||
8ceee660 BH |
2129 | efx_fini_io(efx); |
2130 | EFX_LOG(efx, "shutdown successful\n"); | |
2131 | ||
2132 | pci_set_drvdata(pci_dev, NULL); | |
2133 | efx_fini_struct(efx); | |
2134 | free_netdev(efx->net_dev); | |
2135 | }; | |
2136 | ||
2137 | /* Main body of NIC initialisation | |
2138 | * This is called at module load (or hotplug insertion, theoretically). | |
2139 | */ | |
2140 | static int efx_pci_probe_main(struct efx_nic *efx) | |
2141 | { | |
2142 | int rc; | |
2143 | ||
2144 | /* Do start-of-day initialisation */ | |
2145 | rc = efx_probe_all(efx); | |
2146 | if (rc) | |
2147 | goto fail1; | |
2148 | ||
2149 | rc = efx_init_napi(efx); | |
2150 | if (rc) | |
2151 | goto fail2; | |
2152 | ||
ef2b90ee | 2153 | rc = efx->type->init(efx); |
8ceee660 BH |
2154 | if (rc) { |
2155 | EFX_ERR(efx, "failed to initialise NIC\n"); | |
278c0621 | 2156 | goto fail3; |
8ceee660 BH |
2157 | } |
2158 | ||
2159 | rc = efx_init_port(efx); | |
2160 | if (rc) { | |
2161 | EFX_ERR(efx, "failed to initialise port\n"); | |
278c0621 | 2162 | goto fail4; |
8ceee660 BH |
2163 | } |
2164 | ||
bc3c90a2 | 2165 | efx_init_channels(efx); |
8ceee660 | 2166 | |
152b6a62 | 2167 | rc = efx_nic_init_interrupt(efx); |
8ceee660 | 2168 | if (rc) |
278c0621 | 2169 | goto fail5; |
8ceee660 BH |
2170 | |
2171 | return 0; | |
2172 | ||
278c0621 | 2173 | fail5: |
bc3c90a2 | 2174 | efx_fini_channels(efx); |
8ceee660 | 2175 | efx_fini_port(efx); |
8ceee660 | 2176 | fail4: |
ef2b90ee | 2177 | efx->type->fini(efx); |
8ceee660 BH |
2178 | fail3: |
2179 | efx_fini_napi(efx); | |
2180 | fail2: | |
2181 | efx_remove_all(efx); | |
2182 | fail1: | |
2183 | return rc; | |
2184 | } | |
2185 | ||
2186 | /* NIC initialisation | |
2187 | * | |
2188 | * This is called at module load (or hotplug insertion, | |
2189 | * theoretically). It sets up PCI mappings, tests and resets the NIC, | |
2190 | * sets up and registers the network devices with the kernel and hooks | |
2191 | * the interrupt service routine. It does not prepare the device for | |
2192 | * transmission; this is left to the first time one of the network | |
2193 | * interfaces is brought up (i.e. efx_net_open). | |
2194 | */ | |
2195 | static int __devinit efx_pci_probe(struct pci_dev *pci_dev, | |
2196 | const struct pci_device_id *entry) | |
2197 | { | |
2198 | struct efx_nic_type *type = (struct efx_nic_type *) entry->driver_data; | |
2199 | struct net_device *net_dev; | |
2200 | struct efx_nic *efx; | |
2201 | int i, rc; | |
2202 | ||
2203 | /* Allocate and initialise a struct net_device and struct efx_nic */ | |
2204 | net_dev = alloc_etherdev(sizeof(*efx)); | |
2205 | if (!net_dev) | |
2206 | return -ENOMEM; | |
c383b537 | 2207 | net_dev->features |= (type->offload_features | NETIF_F_SG | |
97bc5415 BH |
2208 | NETIF_F_HIGHDMA | NETIF_F_TSO | |
2209 | NETIF_F_GRO); | |
738a8f4b BH |
2210 | if (type->offload_features & NETIF_F_V6_CSUM) |
2211 | net_dev->features |= NETIF_F_TSO6; | |
28506563 BH |
2212 | /* Mask for features that also apply to VLAN devices */ |
2213 | net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | | |
740847da | 2214 | NETIF_F_HIGHDMA | NETIF_F_TSO); |
767e468c | 2215 | efx = netdev_priv(net_dev); |
8ceee660 BH |
2216 | pci_set_drvdata(pci_dev, efx); |
2217 | rc = efx_init_struct(efx, type, pci_dev, net_dev); | |
2218 | if (rc) | |
2219 | goto fail1; | |
2220 | ||
2221 | EFX_INFO(efx, "Solarflare Communications NIC detected\n"); | |
2222 | ||
2223 | /* Set up basic I/O (BAR mappings etc) */ | |
2224 | rc = efx_init_io(efx); | |
2225 | if (rc) | |
2226 | goto fail2; | |
2227 | ||
2228 | /* No serialisation is required with the reset path because | |
2229 | * we're in STATE_INIT. */ | |
2230 | for (i = 0; i < 5; i++) { | |
2231 | rc = efx_pci_probe_main(efx); | |
8ceee660 BH |
2232 | |
2233 | /* Serialise against efx_reset(). No more resets will be | |
2234 | * scheduled since efx_stop_all() has been called, and we | |
2235 | * have not and never have been registered with either | |
2236 | * the rtnetlink or driverlink layers. */ | |
1ab00629 | 2237 | cancel_work_sync(&efx->reset_work); |
8ceee660 | 2238 | |
fa402b2e SH |
2239 | if (rc == 0) { |
2240 | if (efx->reset_pending != RESET_TYPE_NONE) { | |
2241 | /* If there was a scheduled reset during | |
2242 | * probe, the NIC is probably hosed anyway */ | |
2243 | efx_pci_remove_main(efx); | |
2244 | rc = -EIO; | |
2245 | } else { | |
2246 | break; | |
2247 | } | |
2248 | } | |
2249 | ||
8ceee660 BH |
2250 | /* Retry if a recoverably reset event has been scheduled */ |
2251 | if ((efx->reset_pending != RESET_TYPE_INVISIBLE) && | |
2252 | (efx->reset_pending != RESET_TYPE_ALL)) | |
2253 | goto fail3; | |
2254 | ||
2255 | efx->reset_pending = RESET_TYPE_NONE; | |
2256 | } | |
2257 | ||
2258 | if (rc) { | |
2259 | EFX_ERR(efx, "Could not reset NIC\n"); | |
2260 | goto fail4; | |
2261 | } | |
2262 | ||
55edc6e6 BH |
2263 | /* Switch to the running state before we expose the device to the OS, |
2264 | * so that dev_open()|efx_start_all() will actually start the device */ | |
8ceee660 | 2265 | efx->state = STATE_RUNNING; |
7dde596e | 2266 | |
8ceee660 BH |
2267 | rc = efx_register_netdev(efx); |
2268 | if (rc) | |
2269 | goto fail5; | |
2270 | ||
2271 | EFX_LOG(efx, "initialisation successful\n"); | |
a5211bb5 BH |
2272 | |
2273 | rtnl_lock(); | |
2274 | efx_mtd_probe(efx); /* allowed to fail */ | |
2275 | rtnl_unlock(); | |
8ceee660 BH |
2276 | return 0; |
2277 | ||
2278 | fail5: | |
2279 | efx_pci_remove_main(efx); | |
2280 | fail4: | |
2281 | fail3: | |
2282 | efx_fini_io(efx); | |
2283 | fail2: | |
2284 | efx_fini_struct(efx); | |
2285 | fail1: | |
5e2a911c | 2286 | WARN_ON(rc > 0); |
8ceee660 BH |
2287 | EFX_LOG(efx, "initialisation failed. rc=%d\n", rc); |
2288 | free_netdev(net_dev); | |
2289 | return rc; | |
2290 | } | |
2291 | ||
89c758fa BH |
2292 | static int efx_pm_freeze(struct device *dev) |
2293 | { | |
2294 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
2295 | ||
2296 | efx->state = STATE_FINI; | |
2297 | ||
2298 | netif_device_detach(efx->net_dev); | |
2299 | ||
2300 | efx_stop_all(efx); | |
2301 | efx_fini_channels(efx); | |
2302 | ||
2303 | return 0; | |
2304 | } | |
2305 | ||
2306 | static int efx_pm_thaw(struct device *dev) | |
2307 | { | |
2308 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
2309 | ||
2310 | efx->state = STATE_INIT; | |
2311 | ||
2312 | efx_init_channels(efx); | |
2313 | ||
2314 | mutex_lock(&efx->mac_lock); | |
2315 | efx->phy_op->reconfigure(efx); | |
2316 | mutex_unlock(&efx->mac_lock); | |
2317 | ||
2318 | efx_start_all(efx); | |
2319 | ||
2320 | netif_device_attach(efx->net_dev); | |
2321 | ||
2322 | efx->state = STATE_RUNNING; | |
2323 | ||
2324 | efx->type->resume_wol(efx); | |
2325 | ||
2326 | return 0; | |
2327 | } | |
2328 | ||
2329 | static int efx_pm_poweroff(struct device *dev) | |
2330 | { | |
2331 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
2332 | struct efx_nic *efx = pci_get_drvdata(pci_dev); | |
2333 | ||
2334 | efx->type->fini(efx); | |
2335 | ||
2336 | efx->reset_pending = RESET_TYPE_NONE; | |
2337 | ||
2338 | pci_save_state(pci_dev); | |
2339 | return pci_set_power_state(pci_dev, PCI_D3hot); | |
2340 | } | |
2341 | ||
2342 | /* Used for both resume and restore */ | |
2343 | static int efx_pm_resume(struct device *dev) | |
2344 | { | |
2345 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
2346 | struct efx_nic *efx = pci_get_drvdata(pci_dev); | |
2347 | int rc; | |
2348 | ||
2349 | rc = pci_set_power_state(pci_dev, PCI_D0); | |
2350 | if (rc) | |
2351 | return rc; | |
2352 | pci_restore_state(pci_dev); | |
2353 | rc = pci_enable_device(pci_dev); | |
2354 | if (rc) | |
2355 | return rc; | |
2356 | pci_set_master(efx->pci_dev); | |
2357 | rc = efx->type->reset(efx, RESET_TYPE_ALL); | |
2358 | if (rc) | |
2359 | return rc; | |
2360 | rc = efx->type->init(efx); | |
2361 | if (rc) | |
2362 | return rc; | |
2363 | efx_pm_thaw(dev); | |
2364 | return 0; | |
2365 | } | |
2366 | ||
2367 | static int efx_pm_suspend(struct device *dev) | |
2368 | { | |
2369 | int rc; | |
2370 | ||
2371 | efx_pm_freeze(dev); | |
2372 | rc = efx_pm_poweroff(dev); | |
2373 | if (rc) | |
2374 | efx_pm_resume(dev); | |
2375 | return rc; | |
2376 | } | |
2377 | ||
2378 | static struct dev_pm_ops efx_pm_ops = { | |
2379 | .suspend = efx_pm_suspend, | |
2380 | .resume = efx_pm_resume, | |
2381 | .freeze = efx_pm_freeze, | |
2382 | .thaw = efx_pm_thaw, | |
2383 | .poweroff = efx_pm_poweroff, | |
2384 | .restore = efx_pm_resume, | |
2385 | }; | |
2386 | ||
8ceee660 BH |
2387 | static struct pci_driver efx_pci_driver = { |
2388 | .name = EFX_DRIVER_NAME, | |
2389 | .id_table = efx_pci_table, | |
2390 | .probe = efx_pci_probe, | |
2391 | .remove = efx_pci_remove, | |
89c758fa | 2392 | .driver.pm = &efx_pm_ops, |
8ceee660 BH |
2393 | }; |
2394 | ||
2395 | /************************************************************************** | |
2396 | * | |
2397 | * Kernel module interface | |
2398 | * | |
2399 | *************************************************************************/ | |
2400 | ||
2401 | module_param(interrupt_mode, uint, 0444); | |
2402 | MODULE_PARM_DESC(interrupt_mode, | |
2403 | "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); | |
2404 | ||
2405 | static int __init efx_init_module(void) | |
2406 | { | |
2407 | int rc; | |
2408 | ||
2409 | printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); | |
2410 | ||
2411 | rc = register_netdevice_notifier(&efx_netdev_notifier); | |
2412 | if (rc) | |
2413 | goto err_notifier; | |
2414 | ||
2415 | refill_workqueue = create_workqueue("sfc_refill"); | |
2416 | if (!refill_workqueue) { | |
2417 | rc = -ENOMEM; | |
2418 | goto err_refill; | |
2419 | } | |
1ab00629 SH |
2420 | reset_workqueue = create_singlethread_workqueue("sfc_reset"); |
2421 | if (!reset_workqueue) { | |
2422 | rc = -ENOMEM; | |
2423 | goto err_reset; | |
2424 | } | |
8ceee660 BH |
2425 | |
2426 | rc = pci_register_driver(&efx_pci_driver); | |
2427 | if (rc < 0) | |
2428 | goto err_pci; | |
2429 | ||
2430 | return 0; | |
2431 | ||
2432 | err_pci: | |
1ab00629 SH |
2433 | destroy_workqueue(reset_workqueue); |
2434 | err_reset: | |
8ceee660 BH |
2435 | destroy_workqueue(refill_workqueue); |
2436 | err_refill: | |
2437 | unregister_netdevice_notifier(&efx_netdev_notifier); | |
2438 | err_notifier: | |
2439 | return rc; | |
2440 | } | |
2441 | ||
2442 | static void __exit efx_exit_module(void) | |
2443 | { | |
2444 | printk(KERN_INFO "Solarflare NET driver unloading\n"); | |
2445 | ||
2446 | pci_unregister_driver(&efx_pci_driver); | |
1ab00629 | 2447 | destroy_workqueue(reset_workqueue); |
8ceee660 BH |
2448 | destroy_workqueue(refill_workqueue); |
2449 | unregister_netdevice_notifier(&efx_netdev_notifier); | |
2450 | ||
2451 | } | |
2452 | ||
2453 | module_init(efx_init_module); | |
2454 | module_exit(efx_exit_module); | |
2455 | ||
906bb26c BH |
2456 | MODULE_AUTHOR("Solarflare Communications and " |
2457 | "Michael Brown <mbrown@fensystems.co.uk>"); | |
8ceee660 BH |
2458 | MODULE_DESCRIPTION("Solarflare Communications network driver"); |
2459 | MODULE_LICENSE("GPL"); | |
2460 | MODULE_DEVICE_TABLE(pci, efx_pci_table); |