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8ceee660 BH |
1 | /**************************************************************************** |
2 | * Driver for Solarflare Solarstorm network controllers and boards | |
3 | * Copyright 2005-2006 Fen Systems Ltd. | |
0a6f40c6 | 4 | * Copyright 2005-2011 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> |
626950db | 24 | #include <linux/pci.h> |
64d8ad6d | 25 | #include <linux/cpu_rmap.h> |
626950db | 26 | #include <linux/aer.h> |
8ceee660 | 27 | #include "net_driver.h" |
8ceee660 | 28 | #include "efx.h" |
744093c9 | 29 | #include "nic.h" |
dd40781e | 30 | #include "selftest.h" |
8ceee660 | 31 | |
8880f4ec | 32 | #include "mcdi.h" |
fd371e32 | 33 | #include "workarounds.h" |
8880f4ec | 34 | |
c459302d BH |
35 | /************************************************************************** |
36 | * | |
37 | * Type name strings | |
38 | * | |
39 | ************************************************************************** | |
40 | */ | |
41 | ||
42 | /* Loopback mode names (see LOOPBACK_MODE()) */ | |
43 | const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; | |
18e83e4c | 44 | const char *const efx_loopback_mode_names[] = { |
c459302d | 45 | [LOOPBACK_NONE] = "NONE", |
e58f69f4 | 46 | [LOOPBACK_DATA] = "DATAPATH", |
c459302d BH |
47 | [LOOPBACK_GMAC] = "GMAC", |
48 | [LOOPBACK_XGMII] = "XGMII", | |
49 | [LOOPBACK_XGXS] = "XGXS", | |
9c636baf BH |
50 | [LOOPBACK_XAUI] = "XAUI", |
51 | [LOOPBACK_GMII] = "GMII", | |
52 | [LOOPBACK_SGMII] = "SGMII", | |
e58f69f4 BH |
53 | [LOOPBACK_XGBR] = "XGBR", |
54 | [LOOPBACK_XFI] = "XFI", | |
55 | [LOOPBACK_XAUI_FAR] = "XAUI_FAR", | |
56 | [LOOPBACK_GMII_FAR] = "GMII_FAR", | |
57 | [LOOPBACK_SGMII_FAR] = "SGMII_FAR", | |
58 | [LOOPBACK_XFI_FAR] = "XFI_FAR", | |
c459302d BH |
59 | [LOOPBACK_GPHY] = "GPHY", |
60 | [LOOPBACK_PHYXS] = "PHYXS", | |
9c636baf BH |
61 | [LOOPBACK_PCS] = "PCS", |
62 | [LOOPBACK_PMAPMD] = "PMA/PMD", | |
e58f69f4 BH |
63 | [LOOPBACK_XPORT] = "XPORT", |
64 | [LOOPBACK_XGMII_WS] = "XGMII_WS", | |
9c636baf | 65 | [LOOPBACK_XAUI_WS] = "XAUI_WS", |
e58f69f4 BH |
66 | [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", |
67 | [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", | |
9c636baf | 68 | [LOOPBACK_GMII_WS] = "GMII_WS", |
e58f69f4 BH |
69 | [LOOPBACK_XFI_WS] = "XFI_WS", |
70 | [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", | |
9c636baf | 71 | [LOOPBACK_PHYXS_WS] = "PHYXS_WS", |
c459302d BH |
72 | }; |
73 | ||
c459302d | 74 | const unsigned int efx_reset_type_max = RESET_TYPE_MAX; |
18e83e4c | 75 | const char *const efx_reset_type_names[] = { |
626950db AR |
76 | [RESET_TYPE_INVISIBLE] = "INVISIBLE", |
77 | [RESET_TYPE_ALL] = "ALL", | |
78 | [RESET_TYPE_RECOVER_OR_ALL] = "RECOVER_OR_ALL", | |
79 | [RESET_TYPE_WORLD] = "WORLD", | |
80 | [RESET_TYPE_RECOVER_OR_DISABLE] = "RECOVER_OR_DISABLE", | |
81 | [RESET_TYPE_DISABLE] = "DISABLE", | |
82 | [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", | |
83 | [RESET_TYPE_INT_ERROR] = "INT_ERROR", | |
84 | [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY", | |
85 | [RESET_TYPE_RX_DESC_FETCH] = "RX_DESC_FETCH", | |
86 | [RESET_TYPE_TX_DESC_FETCH] = "TX_DESC_FETCH", | |
87 | [RESET_TYPE_TX_SKIP] = "TX_SKIP", | |
88 | [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", | |
c459302d BH |
89 | }; |
90 | ||
1ab00629 SH |
91 | /* Reset workqueue. If any NIC has a hardware failure then a reset will be |
92 | * queued onto this work queue. This is not a per-nic work queue, because | |
93 | * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. | |
94 | */ | |
95 | static struct workqueue_struct *reset_workqueue; | |
96 | ||
8ceee660 BH |
97 | /************************************************************************** |
98 | * | |
99 | * Configurable values | |
100 | * | |
101 | *************************************************************************/ | |
102 | ||
8ceee660 BH |
103 | /* |
104 | * Use separate channels for TX and RX events | |
105 | * | |
28b581ab NT |
106 | * Set this to 1 to use separate channels for TX and RX. It allows us |
107 | * to control interrupt affinity separately for TX and RX. | |
8ceee660 | 108 | * |
28b581ab | 109 | * This is only used in MSI-X interrupt mode |
8ceee660 | 110 | */ |
b9cc977d BH |
111 | static bool separate_tx_channels; |
112 | module_param(separate_tx_channels, bool, 0444); | |
28b581ab NT |
113 | MODULE_PARM_DESC(separate_tx_channels, |
114 | "Use separate channels for TX and RX"); | |
8ceee660 BH |
115 | |
116 | /* This is the weight assigned to each of the (per-channel) virtual | |
117 | * NAPI devices. | |
118 | */ | |
119 | static int napi_weight = 64; | |
120 | ||
121 | /* This is the time (in jiffies) between invocations of the hardware | |
626950db AR |
122 | * monitor. |
123 | * On Falcon-based NICs, this will: | |
e254c274 BH |
124 | * - Check the on-board hardware monitor; |
125 | * - Poll the link state and reconfigure the hardware as necessary. | |
626950db AR |
126 | * On Siena-based NICs for power systems with EEH support, this will give EEH a |
127 | * chance to start. | |
8ceee660 | 128 | */ |
d215697f | 129 | static unsigned int efx_monitor_interval = 1 * HZ; |
8ceee660 | 130 | |
8ceee660 BH |
131 | /* Initial interrupt moderation settings. They can be modified after |
132 | * module load with ethtool. | |
133 | * | |
134 | * The default for RX should strike a balance between increasing the | |
135 | * round-trip latency and reducing overhead. | |
136 | */ | |
137 | static unsigned int rx_irq_mod_usec = 60; | |
138 | ||
139 | /* Initial interrupt moderation settings. They can be modified after | |
140 | * module load with ethtool. | |
141 | * | |
142 | * This default is chosen to ensure that a 10G link does not go idle | |
143 | * while a TX queue is stopped after it has become full. A queue is | |
144 | * restarted when it drops below half full. The time this takes (assuming | |
145 | * worst case 3 descriptors per packet and 1024 descriptors) is | |
146 | * 512 / 3 * 1.2 = 205 usec. | |
147 | */ | |
148 | static unsigned int tx_irq_mod_usec = 150; | |
149 | ||
150 | /* This is the first interrupt mode to try out of: | |
151 | * 0 => MSI-X | |
152 | * 1 => MSI | |
153 | * 2 => legacy | |
154 | */ | |
155 | static unsigned int interrupt_mode; | |
156 | ||
157 | /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), | |
158 | * i.e. the number of CPUs among which we may distribute simultaneous | |
159 | * interrupt handling. | |
160 | * | |
161 | * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. | |
cdb08f8f | 162 | * The default (0) means to assign an interrupt to each core. |
8ceee660 BH |
163 | */ |
164 | static unsigned int rss_cpus; | |
165 | module_param(rss_cpus, uint, 0444); | |
166 | MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); | |
167 | ||
b9cc977d BH |
168 | static bool phy_flash_cfg; |
169 | module_param(phy_flash_cfg, bool, 0644); | |
84ae48fe BH |
170 | MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); |
171 | ||
e7bed9c8 | 172 | static unsigned irq_adapt_low_thresh = 8000; |
6fb70fd1 BH |
173 | module_param(irq_adapt_low_thresh, uint, 0644); |
174 | MODULE_PARM_DESC(irq_adapt_low_thresh, | |
175 | "Threshold score for reducing IRQ moderation"); | |
176 | ||
e7bed9c8 | 177 | static unsigned irq_adapt_high_thresh = 16000; |
6fb70fd1 BH |
178 | module_param(irq_adapt_high_thresh, uint, 0644); |
179 | MODULE_PARM_DESC(irq_adapt_high_thresh, | |
180 | "Threshold score for increasing IRQ moderation"); | |
181 | ||
62776d03 BH |
182 | static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | |
183 | NETIF_MSG_LINK | NETIF_MSG_IFDOWN | | |
184 | NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | | |
185 | NETIF_MSG_TX_ERR | NETIF_MSG_HW); | |
186 | module_param(debug, uint, 0); | |
187 | MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); | |
188 | ||
8ceee660 BH |
189 | /************************************************************************** |
190 | * | |
191 | * Utility functions and prototypes | |
192 | * | |
193 | *************************************************************************/ | |
4642610c | 194 | |
7f967c01 BH |
195 | static void efx_start_interrupts(struct efx_nic *efx, bool may_keep_eventq); |
196 | static void efx_stop_interrupts(struct efx_nic *efx, bool may_keep_eventq); | |
197 | static void efx_remove_channel(struct efx_channel *channel); | |
4642610c | 198 | static void efx_remove_channels(struct efx_nic *efx); |
7f967c01 | 199 | static const struct efx_channel_type efx_default_channel_type; |
8ceee660 | 200 | static void efx_remove_port(struct efx_nic *efx); |
7f967c01 | 201 | static void efx_init_napi_channel(struct efx_channel *channel); |
8ceee660 | 202 | static void efx_fini_napi(struct efx_nic *efx); |
e8f14992 | 203 | static void efx_fini_napi_channel(struct efx_channel *channel); |
4642610c BH |
204 | static void efx_fini_struct(struct efx_nic *efx); |
205 | static void efx_start_all(struct efx_nic *efx); | |
206 | static void efx_stop_all(struct efx_nic *efx); | |
8ceee660 BH |
207 | |
208 | #define EFX_ASSERT_RESET_SERIALISED(efx) \ | |
209 | do { \ | |
f16aeea0 | 210 | if ((efx->state == STATE_READY) || \ |
626950db | 211 | (efx->state == STATE_RECOVERY) || \ |
332c1ce9 | 212 | (efx->state == STATE_DISABLED)) \ |
8ceee660 BH |
213 | ASSERT_RTNL(); \ |
214 | } while (0) | |
215 | ||
8b7325b4 BH |
216 | static int efx_check_disabled(struct efx_nic *efx) |
217 | { | |
626950db | 218 | if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) { |
8b7325b4 BH |
219 | netif_err(efx, drv, efx->net_dev, |
220 | "device is disabled due to earlier errors\n"); | |
221 | return -EIO; | |
222 | } | |
223 | return 0; | |
224 | } | |
225 | ||
8ceee660 BH |
226 | /************************************************************************** |
227 | * | |
228 | * Event queue processing | |
229 | * | |
230 | *************************************************************************/ | |
231 | ||
232 | /* Process channel's event queue | |
233 | * | |
234 | * This function is responsible for processing the event queue of a | |
235 | * single channel. The caller must guarantee that this function will | |
236 | * never be concurrently called more than once on the same channel, | |
237 | * though different channels may be being processed concurrently. | |
238 | */ | |
fa236e18 | 239 | static int efx_process_channel(struct efx_channel *channel, int budget) |
8ceee660 | 240 | { |
fa236e18 | 241 | int spent; |
8ceee660 | 242 | |
9f2cb71c | 243 | if (unlikely(!channel->enabled)) |
42cbe2d7 | 244 | return 0; |
8ceee660 | 245 | |
fa236e18 | 246 | spent = efx_nic_process_eventq(channel, budget); |
d9ab7007 BH |
247 | if (spent && efx_channel_has_rx_queue(channel)) { |
248 | struct efx_rx_queue *rx_queue = | |
249 | efx_channel_get_rx_queue(channel); | |
250 | ||
ff734ef4 | 251 | efx_rx_flush_packet(channel); |
97d48a10 | 252 | if (rx_queue->enabled) |
9f2cb71c | 253 | efx_fast_push_rx_descriptors(rx_queue); |
8ceee660 BH |
254 | } |
255 | ||
fa236e18 | 256 | return spent; |
8ceee660 BH |
257 | } |
258 | ||
259 | /* Mark channel as finished processing | |
260 | * | |
261 | * Note that since we will not receive further interrupts for this | |
262 | * channel before we finish processing and call the eventq_read_ack() | |
263 | * method, there is no need to use the interrupt hold-off timers. | |
264 | */ | |
265 | static inline void efx_channel_processed(struct efx_channel *channel) | |
266 | { | |
5b9e207c BH |
267 | /* The interrupt handler for this channel may set work_pending |
268 | * as soon as we acknowledge the events we've seen. Make sure | |
269 | * it's cleared before then. */ | |
dc8cfa55 | 270 | channel->work_pending = false; |
5b9e207c BH |
271 | smp_wmb(); |
272 | ||
152b6a62 | 273 | efx_nic_eventq_read_ack(channel); |
8ceee660 BH |
274 | } |
275 | ||
276 | /* NAPI poll handler | |
277 | * | |
278 | * NAPI guarantees serialisation of polls of the same device, which | |
279 | * provides the guarantee required by efx_process_channel(). | |
280 | */ | |
281 | static int efx_poll(struct napi_struct *napi, int budget) | |
282 | { | |
283 | struct efx_channel *channel = | |
284 | container_of(napi, struct efx_channel, napi_str); | |
62776d03 | 285 | struct efx_nic *efx = channel->efx; |
fa236e18 | 286 | int spent; |
8ceee660 | 287 | |
62776d03 BH |
288 | netif_vdbg(efx, intr, efx->net_dev, |
289 | "channel %d NAPI poll executing on CPU %d\n", | |
290 | channel->channel, raw_smp_processor_id()); | |
8ceee660 | 291 | |
fa236e18 | 292 | spent = efx_process_channel(channel, budget); |
8ceee660 | 293 | |
fa236e18 | 294 | if (spent < budget) { |
9d9a6973 | 295 | if (efx_channel_has_rx_queue(channel) && |
6fb70fd1 BH |
296 | efx->irq_rx_adaptive && |
297 | unlikely(++channel->irq_count == 1000)) { | |
6fb70fd1 BH |
298 | if (unlikely(channel->irq_mod_score < |
299 | irq_adapt_low_thresh)) { | |
0d86ebd8 BH |
300 | if (channel->irq_moderation > 1) { |
301 | channel->irq_moderation -= 1; | |
ef2b90ee | 302 | efx->type->push_irq_moderation(channel); |
0d86ebd8 | 303 | } |
6fb70fd1 BH |
304 | } else if (unlikely(channel->irq_mod_score > |
305 | irq_adapt_high_thresh)) { | |
0d86ebd8 BH |
306 | if (channel->irq_moderation < |
307 | efx->irq_rx_moderation) { | |
308 | channel->irq_moderation += 1; | |
ef2b90ee | 309 | efx->type->push_irq_moderation(channel); |
0d86ebd8 | 310 | } |
6fb70fd1 | 311 | } |
6fb70fd1 BH |
312 | channel->irq_count = 0; |
313 | channel->irq_mod_score = 0; | |
314 | } | |
315 | ||
64d8ad6d BH |
316 | efx_filter_rfs_expire(channel); |
317 | ||
8ceee660 | 318 | /* There is no race here; although napi_disable() will |
288379f0 | 319 | * only wait for napi_complete(), this isn't a problem |
8ceee660 BH |
320 | * since efx_channel_processed() will have no effect if |
321 | * interrupts have already been disabled. | |
322 | */ | |
288379f0 | 323 | napi_complete(napi); |
8ceee660 BH |
324 | efx_channel_processed(channel); |
325 | } | |
326 | ||
fa236e18 | 327 | return spent; |
8ceee660 BH |
328 | } |
329 | ||
330 | /* Process the eventq of the specified channel immediately on this CPU | |
331 | * | |
332 | * Disable hardware generated interrupts, wait for any existing | |
333 | * processing to finish, then directly poll (and ack ) the eventq. | |
334 | * Finally reenable NAPI and interrupts. | |
335 | * | |
d4fabcc8 BH |
336 | * This is for use only during a loopback self-test. It must not |
337 | * deliver any packets up the stack as this can result in deadlock. | |
8ceee660 BH |
338 | */ |
339 | void efx_process_channel_now(struct efx_channel *channel) | |
340 | { | |
341 | struct efx_nic *efx = channel->efx; | |
342 | ||
8313aca3 | 343 | BUG_ON(channel->channel >= efx->n_channels); |
8ceee660 | 344 | BUG_ON(!channel->enabled); |
d4fabcc8 | 345 | BUG_ON(!efx->loopback_selftest); |
8ceee660 BH |
346 | |
347 | /* Disable interrupts and wait for ISRs to complete */ | |
152b6a62 | 348 | efx_nic_disable_interrupts(efx); |
94dec6a2 | 349 | if (efx->legacy_irq) { |
8ceee660 | 350 | synchronize_irq(efx->legacy_irq); |
94dec6a2 BH |
351 | efx->legacy_irq_enabled = false; |
352 | } | |
64ee3120 | 353 | if (channel->irq) |
8ceee660 BH |
354 | synchronize_irq(channel->irq); |
355 | ||
356 | /* Wait for any NAPI processing to complete */ | |
357 | napi_disable(&channel->napi_str); | |
358 | ||
359 | /* Poll the channel */ | |
ecc910f5 | 360 | efx_process_channel(channel, channel->eventq_mask + 1); |
8ceee660 BH |
361 | |
362 | /* Ack the eventq. This may cause an interrupt to be generated | |
363 | * when they are reenabled */ | |
364 | efx_channel_processed(channel); | |
365 | ||
366 | napi_enable(&channel->napi_str); | |
94dec6a2 BH |
367 | if (efx->legacy_irq) |
368 | efx->legacy_irq_enabled = true; | |
152b6a62 | 369 | efx_nic_enable_interrupts(efx); |
8ceee660 BH |
370 | } |
371 | ||
372 | /* Create event queue | |
373 | * Event queue memory allocations are done only once. If the channel | |
374 | * is reset, the memory buffer will be reused; this guards against | |
375 | * errors during channel reset and also simplifies interrupt handling. | |
376 | */ | |
377 | static int efx_probe_eventq(struct efx_channel *channel) | |
378 | { | |
ecc910f5 SH |
379 | struct efx_nic *efx = channel->efx; |
380 | unsigned long entries; | |
381 | ||
86ee5302 | 382 | netif_dbg(efx, probe, efx->net_dev, |
62776d03 | 383 | "chan %d create event queue\n", channel->channel); |
8ceee660 | 384 | |
ecc910f5 SH |
385 | /* Build an event queue with room for one event per tx and rx buffer, |
386 | * plus some extra for link state events and MCDI completions. */ | |
387 | entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); | |
388 | EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); | |
389 | channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; | |
390 | ||
152b6a62 | 391 | return efx_nic_probe_eventq(channel); |
8ceee660 BH |
392 | } |
393 | ||
394 | /* Prepare channel's event queue */ | |
bc3c90a2 | 395 | static void efx_init_eventq(struct efx_channel *channel) |
8ceee660 | 396 | { |
62776d03 BH |
397 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
398 | "chan %d init event queue\n", channel->channel); | |
8ceee660 BH |
399 | |
400 | channel->eventq_read_ptr = 0; | |
401 | ||
152b6a62 | 402 | efx_nic_init_eventq(channel); |
8ceee660 BH |
403 | } |
404 | ||
9f2cb71c BH |
405 | /* Enable event queue processing and NAPI */ |
406 | static void efx_start_eventq(struct efx_channel *channel) | |
407 | { | |
408 | netif_dbg(channel->efx, ifup, channel->efx->net_dev, | |
409 | "chan %d start event queue\n", channel->channel); | |
410 | ||
411 | /* The interrupt handler for this channel may set work_pending | |
412 | * as soon as we enable it. Make sure it's cleared before | |
413 | * then. Similarly, make sure it sees the enabled flag set. | |
414 | */ | |
415 | channel->work_pending = false; | |
416 | channel->enabled = true; | |
417 | smp_wmb(); | |
418 | ||
419 | napi_enable(&channel->napi_str); | |
420 | efx_nic_eventq_read_ack(channel); | |
421 | } | |
422 | ||
423 | /* Disable event queue processing and NAPI */ | |
424 | static void efx_stop_eventq(struct efx_channel *channel) | |
425 | { | |
426 | if (!channel->enabled) | |
427 | return; | |
428 | ||
429 | napi_disable(&channel->napi_str); | |
430 | channel->enabled = false; | |
431 | } | |
432 | ||
8ceee660 BH |
433 | static void efx_fini_eventq(struct efx_channel *channel) |
434 | { | |
62776d03 BH |
435 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
436 | "chan %d fini event queue\n", channel->channel); | |
8ceee660 | 437 | |
152b6a62 | 438 | efx_nic_fini_eventq(channel); |
8ceee660 BH |
439 | } |
440 | ||
441 | static void efx_remove_eventq(struct efx_channel *channel) | |
442 | { | |
62776d03 BH |
443 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
444 | "chan %d remove event queue\n", channel->channel); | |
8ceee660 | 445 | |
152b6a62 | 446 | efx_nic_remove_eventq(channel); |
8ceee660 BH |
447 | } |
448 | ||
449 | /************************************************************************** | |
450 | * | |
451 | * Channel handling | |
452 | * | |
453 | *************************************************************************/ | |
454 | ||
7f967c01 | 455 | /* Allocate and initialise a channel structure. */ |
4642610c BH |
456 | static struct efx_channel * |
457 | efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) | |
458 | { | |
459 | struct efx_channel *channel; | |
460 | struct efx_rx_queue *rx_queue; | |
461 | struct efx_tx_queue *tx_queue; | |
462 | int j; | |
463 | ||
7f967c01 BH |
464 | channel = kzalloc(sizeof(*channel), GFP_KERNEL); |
465 | if (!channel) | |
466 | return NULL; | |
4642610c | 467 | |
7f967c01 BH |
468 | channel->efx = efx; |
469 | channel->channel = i; | |
470 | channel->type = &efx_default_channel_type; | |
4642610c | 471 | |
7f967c01 BH |
472 | for (j = 0; j < EFX_TXQ_TYPES; j++) { |
473 | tx_queue = &channel->tx_queue[j]; | |
474 | tx_queue->efx = efx; | |
475 | tx_queue->queue = i * EFX_TXQ_TYPES + j; | |
476 | tx_queue->channel = channel; | |
477 | } | |
4642610c | 478 | |
7f967c01 BH |
479 | rx_queue = &channel->rx_queue; |
480 | rx_queue->efx = efx; | |
481 | setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, | |
482 | (unsigned long)rx_queue); | |
4642610c | 483 | |
7f967c01 BH |
484 | return channel; |
485 | } | |
486 | ||
487 | /* Allocate and initialise a channel structure, copying parameters | |
488 | * (but not resources) from an old channel structure. | |
489 | */ | |
490 | static struct efx_channel * | |
491 | efx_copy_channel(const struct efx_channel *old_channel) | |
492 | { | |
493 | struct efx_channel *channel; | |
494 | struct efx_rx_queue *rx_queue; | |
495 | struct efx_tx_queue *tx_queue; | |
496 | int j; | |
4642610c | 497 | |
7f967c01 BH |
498 | channel = kmalloc(sizeof(*channel), GFP_KERNEL); |
499 | if (!channel) | |
500 | return NULL; | |
501 | ||
502 | *channel = *old_channel; | |
503 | ||
504 | channel->napi_dev = NULL; | |
505 | memset(&channel->eventq, 0, sizeof(channel->eventq)); | |
4642610c | 506 | |
7f967c01 BH |
507 | for (j = 0; j < EFX_TXQ_TYPES; j++) { |
508 | tx_queue = &channel->tx_queue[j]; | |
509 | if (tx_queue->channel) | |
4642610c | 510 | tx_queue->channel = channel; |
7f967c01 BH |
511 | tx_queue->buffer = NULL; |
512 | memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); | |
4642610c BH |
513 | } |
514 | ||
4642610c | 515 | rx_queue = &channel->rx_queue; |
7f967c01 BH |
516 | rx_queue->buffer = NULL; |
517 | memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); | |
4642610c BH |
518 | setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, |
519 | (unsigned long)rx_queue); | |
520 | ||
521 | return channel; | |
522 | } | |
523 | ||
8ceee660 BH |
524 | static int efx_probe_channel(struct efx_channel *channel) |
525 | { | |
526 | struct efx_tx_queue *tx_queue; | |
527 | struct efx_rx_queue *rx_queue; | |
528 | int rc; | |
529 | ||
62776d03 BH |
530 | netif_dbg(channel->efx, probe, channel->efx->net_dev, |
531 | "creating channel %d\n", channel->channel); | |
8ceee660 | 532 | |
7f967c01 BH |
533 | rc = channel->type->pre_probe(channel); |
534 | if (rc) | |
535 | goto fail; | |
536 | ||
8ceee660 BH |
537 | rc = efx_probe_eventq(channel); |
538 | if (rc) | |
7f967c01 | 539 | goto fail; |
8ceee660 BH |
540 | |
541 | efx_for_each_channel_tx_queue(tx_queue, channel) { | |
542 | rc = efx_probe_tx_queue(tx_queue); | |
543 | if (rc) | |
7f967c01 | 544 | goto fail; |
8ceee660 BH |
545 | } |
546 | ||
547 | efx_for_each_channel_rx_queue(rx_queue, channel) { | |
548 | rc = efx_probe_rx_queue(rx_queue); | |
549 | if (rc) | |
7f967c01 | 550 | goto fail; |
8ceee660 BH |
551 | } |
552 | ||
553 | channel->n_rx_frm_trunc = 0; | |
554 | ||
555 | return 0; | |
556 | ||
7f967c01 BH |
557 | fail: |
558 | efx_remove_channel(channel); | |
8ceee660 BH |
559 | return rc; |
560 | } | |
561 | ||
7f967c01 BH |
562 | static void |
563 | efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) | |
564 | { | |
565 | struct efx_nic *efx = channel->efx; | |
566 | const char *type; | |
567 | int number; | |
568 | ||
569 | number = channel->channel; | |
570 | if (efx->tx_channel_offset == 0) { | |
571 | type = ""; | |
572 | } else if (channel->channel < efx->tx_channel_offset) { | |
573 | type = "-rx"; | |
574 | } else { | |
575 | type = "-tx"; | |
576 | number -= efx->tx_channel_offset; | |
577 | } | |
578 | snprintf(buf, len, "%s%s-%d", efx->name, type, number); | |
579 | } | |
8ceee660 | 580 | |
56536e9c BH |
581 | static void efx_set_channel_names(struct efx_nic *efx) |
582 | { | |
583 | struct efx_channel *channel; | |
56536e9c | 584 | |
7f967c01 BH |
585 | efx_for_each_channel(channel, efx) |
586 | channel->type->get_name(channel, | |
587 | efx->channel_name[channel->channel], | |
588 | sizeof(efx->channel_name[0])); | |
56536e9c BH |
589 | } |
590 | ||
4642610c BH |
591 | static int efx_probe_channels(struct efx_nic *efx) |
592 | { | |
593 | struct efx_channel *channel; | |
594 | int rc; | |
595 | ||
596 | /* Restart special buffer allocation */ | |
597 | efx->next_buffer_table = 0; | |
598 | ||
c92aaff1 BH |
599 | /* Probe channels in reverse, so that any 'extra' channels |
600 | * use the start of the buffer table. This allows the traffic | |
601 | * channels to be resized without moving them or wasting the | |
602 | * entries before them. | |
603 | */ | |
604 | efx_for_each_channel_rev(channel, efx) { | |
4642610c BH |
605 | rc = efx_probe_channel(channel); |
606 | if (rc) { | |
607 | netif_err(efx, probe, efx->net_dev, | |
608 | "failed to create channel %d\n", | |
609 | channel->channel); | |
610 | goto fail; | |
611 | } | |
612 | } | |
613 | efx_set_channel_names(efx); | |
614 | ||
615 | return 0; | |
616 | ||
617 | fail: | |
618 | efx_remove_channels(efx); | |
619 | return rc; | |
620 | } | |
621 | ||
8ceee660 BH |
622 | /* Channels are shutdown and reinitialised whilst the NIC is running |
623 | * to propagate configuration changes (mtu, checksum offload), or | |
624 | * to clear hardware error conditions | |
625 | */ | |
9f2cb71c | 626 | static void efx_start_datapath(struct efx_nic *efx) |
8ceee660 | 627 | { |
85740cdf | 628 | bool old_rx_scatter = efx->rx_scatter; |
8ceee660 BH |
629 | struct efx_tx_queue *tx_queue; |
630 | struct efx_rx_queue *rx_queue; | |
631 | struct efx_channel *channel; | |
85740cdf | 632 | size_t rx_buf_len; |
8ceee660 | 633 | |
f7f13b0b BH |
634 | /* Calculate the rx buffer allocation parameters required to |
635 | * support the current MTU, including padding for header | |
636 | * alignment and overruns. | |
637 | */ | |
272baeeb BH |
638 | efx->rx_dma_len = (efx->type->rx_buffer_hash_size + |
639 | EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + | |
640 | efx->type->rx_buffer_padding); | |
85740cdf BH |
641 | rx_buf_len = (sizeof(struct efx_rx_page_state) + |
642 | EFX_PAGE_IP_ALIGN + efx->rx_dma_len); | |
643 | if (rx_buf_len <= PAGE_SIZE) { | |
644 | efx->rx_scatter = false; | |
645 | efx->rx_buffer_order = 0; | |
646 | if (rx_buf_len <= PAGE_SIZE / 2) | |
647 | efx->rx_buffer_truesize = PAGE_SIZE / 2; | |
648 | else | |
649 | efx->rx_buffer_truesize = PAGE_SIZE; | |
650 | } else if (efx->type->can_rx_scatter) { | |
651 | BUILD_BUG_ON(sizeof(struct efx_rx_page_state) + | |
652 | EFX_PAGE_IP_ALIGN + EFX_RX_USR_BUF_SIZE > | |
653 | PAGE_SIZE / 2); | |
654 | efx->rx_scatter = true; | |
655 | efx->rx_dma_len = EFX_RX_USR_BUF_SIZE; | |
656 | efx->rx_buffer_order = 0; | |
657 | efx->rx_buffer_truesize = PAGE_SIZE / 2; | |
658 | } else { | |
659 | efx->rx_scatter = false; | |
660 | efx->rx_buffer_order = get_order(rx_buf_len); | |
661 | efx->rx_buffer_truesize = PAGE_SIZE << efx->rx_buffer_order; | |
662 | } | |
663 | ||
664 | /* RX filters also have scatter-enabled flags */ | |
665 | if (efx->rx_scatter != old_rx_scatter) | |
666 | efx_filter_update_rx_scatter(efx); | |
8ceee660 | 667 | |
14bf718f BH |
668 | /* We must keep at least one descriptor in a TX ring empty. |
669 | * We could avoid this when the queue size does not exactly | |
670 | * match the hardware ring size, but it's not that important. | |
671 | * Therefore we stop the queue when one more skb might fill | |
672 | * the ring completely. We wake it when half way back to | |
673 | * empty. | |
674 | */ | |
675 | efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx); | |
676 | efx->txq_wake_thresh = efx->txq_stop_thresh / 2; | |
677 | ||
8ceee660 BH |
678 | /* Initialise the channels */ |
679 | efx_for_each_channel(channel, efx) { | |
bc3c90a2 BH |
680 | efx_for_each_channel_tx_queue(tx_queue, channel) |
681 | efx_init_tx_queue(tx_queue); | |
8ceee660 | 682 | |
9f2cb71c | 683 | efx_for_each_channel_rx_queue(rx_queue, channel) { |
bc3c90a2 | 684 | efx_init_rx_queue(rx_queue); |
9f2cb71c BH |
685 | efx_nic_generate_fill_event(rx_queue); |
686 | } | |
8ceee660 | 687 | |
85740cdf | 688 | WARN_ON(channel->rx_pkt_n_frags); |
8ceee660 | 689 | } |
8ceee660 | 690 | |
9f2cb71c BH |
691 | if (netif_device_present(efx->net_dev)) |
692 | netif_tx_wake_all_queues(efx->net_dev); | |
8ceee660 BH |
693 | } |
694 | ||
9f2cb71c | 695 | static void efx_stop_datapath(struct efx_nic *efx) |
8ceee660 BH |
696 | { |
697 | struct efx_channel *channel; | |
698 | struct efx_tx_queue *tx_queue; | |
699 | struct efx_rx_queue *rx_queue; | |
3dca9d2d | 700 | struct pci_dev *dev = efx->pci_dev; |
6bc5d3a9 | 701 | int rc; |
8ceee660 BH |
702 | |
703 | EFX_ASSERT_RESET_SERIALISED(efx); | |
704 | BUG_ON(efx->port_enabled); | |
705 | ||
3dca9d2d | 706 | /* Only perform flush if dma is enabled */ |
626950db | 707 | if (dev->is_busmaster && efx->state != STATE_RECOVERY) { |
3dca9d2d SH |
708 | rc = efx_nic_flush_queues(efx); |
709 | ||
710 | if (rc && EFX_WORKAROUND_7803(efx)) { | |
711 | /* Schedule a reset to recover from the flush failure. The | |
712 | * descriptor caches reference memory we're about to free, | |
713 | * but falcon_reconfigure_mac_wrapper() won't reconnect | |
714 | * the MACs because of the pending reset. */ | |
715 | netif_err(efx, drv, efx->net_dev, | |
716 | "Resetting to recover from flush failure\n"); | |
717 | efx_schedule_reset(efx, RESET_TYPE_ALL); | |
718 | } else if (rc) { | |
719 | netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); | |
720 | } else { | |
721 | netif_dbg(efx, drv, efx->net_dev, | |
722 | "successfully flushed all queues\n"); | |
723 | } | |
fd371e32 | 724 | } |
6bc5d3a9 | 725 | |
8ceee660 | 726 | efx_for_each_channel(channel, efx) { |
9f2cb71c BH |
727 | /* RX packet processing is pipelined, so wait for the |
728 | * NAPI handler to complete. At least event queue 0 | |
729 | * might be kept active by non-data events, so don't | |
730 | * use napi_synchronize() but actually disable NAPI | |
731 | * temporarily. | |
732 | */ | |
733 | if (efx_channel_has_rx_queue(channel)) { | |
734 | efx_stop_eventq(channel); | |
735 | efx_start_eventq(channel); | |
736 | } | |
8ceee660 BH |
737 | |
738 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
739 | efx_fini_rx_queue(rx_queue); | |
94b274bf | 740 | efx_for_each_possible_channel_tx_queue(tx_queue, channel) |
8ceee660 | 741 | efx_fini_tx_queue(tx_queue); |
8ceee660 BH |
742 | } |
743 | } | |
744 | ||
745 | static void efx_remove_channel(struct efx_channel *channel) | |
746 | { | |
747 | struct efx_tx_queue *tx_queue; | |
748 | struct efx_rx_queue *rx_queue; | |
749 | ||
62776d03 BH |
750 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
751 | "destroy chan %d\n", channel->channel); | |
8ceee660 BH |
752 | |
753 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
754 | efx_remove_rx_queue(rx_queue); | |
94b274bf | 755 | efx_for_each_possible_channel_tx_queue(tx_queue, channel) |
8ceee660 BH |
756 | efx_remove_tx_queue(tx_queue); |
757 | efx_remove_eventq(channel); | |
c31e5f9f | 758 | channel->type->post_remove(channel); |
8ceee660 BH |
759 | } |
760 | ||
4642610c BH |
761 | static void efx_remove_channels(struct efx_nic *efx) |
762 | { | |
763 | struct efx_channel *channel; | |
764 | ||
765 | efx_for_each_channel(channel, efx) | |
766 | efx_remove_channel(channel); | |
767 | } | |
768 | ||
769 | int | |
770 | efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) | |
771 | { | |
772 | struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; | |
773 | u32 old_rxq_entries, old_txq_entries; | |
7f967c01 | 774 | unsigned i, next_buffer_table = 0; |
8b7325b4 BH |
775 | int rc; |
776 | ||
777 | rc = efx_check_disabled(efx); | |
778 | if (rc) | |
779 | return rc; | |
7f967c01 BH |
780 | |
781 | /* Not all channels should be reallocated. We must avoid | |
782 | * reallocating their buffer table entries. | |
783 | */ | |
784 | efx_for_each_channel(channel, efx) { | |
785 | struct efx_rx_queue *rx_queue; | |
786 | struct efx_tx_queue *tx_queue; | |
787 | ||
788 | if (channel->type->copy) | |
789 | continue; | |
790 | next_buffer_table = max(next_buffer_table, | |
791 | channel->eventq.index + | |
792 | channel->eventq.entries); | |
793 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
794 | next_buffer_table = max(next_buffer_table, | |
795 | rx_queue->rxd.index + | |
796 | rx_queue->rxd.entries); | |
797 | efx_for_each_channel_tx_queue(tx_queue, channel) | |
798 | next_buffer_table = max(next_buffer_table, | |
799 | tx_queue->txd.index + | |
800 | tx_queue->txd.entries); | |
801 | } | |
4642610c | 802 | |
29c69a48 | 803 | efx_device_detach_sync(efx); |
4642610c | 804 | efx_stop_all(efx); |
7f967c01 | 805 | efx_stop_interrupts(efx, true); |
4642610c | 806 | |
7f967c01 | 807 | /* Clone channels (where possible) */ |
4642610c BH |
808 | memset(other_channel, 0, sizeof(other_channel)); |
809 | for (i = 0; i < efx->n_channels; i++) { | |
7f967c01 BH |
810 | channel = efx->channel[i]; |
811 | if (channel->type->copy) | |
812 | channel = channel->type->copy(channel); | |
4642610c BH |
813 | if (!channel) { |
814 | rc = -ENOMEM; | |
815 | goto out; | |
816 | } | |
817 | other_channel[i] = channel; | |
818 | } | |
819 | ||
820 | /* Swap entry counts and channel pointers */ | |
821 | old_rxq_entries = efx->rxq_entries; | |
822 | old_txq_entries = efx->txq_entries; | |
823 | efx->rxq_entries = rxq_entries; | |
824 | efx->txq_entries = txq_entries; | |
825 | for (i = 0; i < efx->n_channels; i++) { | |
826 | channel = efx->channel[i]; | |
827 | efx->channel[i] = other_channel[i]; | |
828 | other_channel[i] = channel; | |
829 | } | |
830 | ||
7f967c01 BH |
831 | /* Restart buffer table allocation */ |
832 | efx->next_buffer_table = next_buffer_table; | |
e8f14992 | 833 | |
e8f14992 | 834 | for (i = 0; i < efx->n_channels; i++) { |
7f967c01 BH |
835 | channel = efx->channel[i]; |
836 | if (!channel->type->copy) | |
837 | continue; | |
838 | rc = efx_probe_channel(channel); | |
839 | if (rc) | |
840 | goto rollback; | |
841 | efx_init_napi_channel(efx->channel[i]); | |
e8f14992 | 842 | } |
7f967c01 | 843 | |
4642610c | 844 | out: |
7f967c01 BH |
845 | /* Destroy unused channel structures */ |
846 | for (i = 0; i < efx->n_channels; i++) { | |
847 | channel = other_channel[i]; | |
848 | if (channel && channel->type->copy) { | |
849 | efx_fini_napi_channel(channel); | |
850 | efx_remove_channel(channel); | |
851 | kfree(channel); | |
852 | } | |
853 | } | |
4642610c | 854 | |
7f967c01 | 855 | efx_start_interrupts(efx, true); |
4642610c | 856 | efx_start_all(efx); |
29c69a48 | 857 | netif_device_attach(efx->net_dev); |
4642610c BH |
858 | return rc; |
859 | ||
860 | rollback: | |
861 | /* Swap back */ | |
862 | efx->rxq_entries = old_rxq_entries; | |
863 | efx->txq_entries = old_txq_entries; | |
864 | for (i = 0; i < efx->n_channels; i++) { | |
865 | channel = efx->channel[i]; | |
866 | efx->channel[i] = other_channel[i]; | |
867 | other_channel[i] = channel; | |
868 | } | |
869 | goto out; | |
870 | } | |
871 | ||
90d683af | 872 | void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) |
8ceee660 | 873 | { |
90d683af | 874 | mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); |
8ceee660 BH |
875 | } |
876 | ||
7f967c01 BH |
877 | static const struct efx_channel_type efx_default_channel_type = { |
878 | .pre_probe = efx_channel_dummy_op_int, | |
c31e5f9f | 879 | .post_remove = efx_channel_dummy_op_void, |
7f967c01 BH |
880 | .get_name = efx_get_channel_name, |
881 | .copy = efx_copy_channel, | |
882 | .keep_eventq = false, | |
883 | }; | |
884 | ||
885 | int efx_channel_dummy_op_int(struct efx_channel *channel) | |
886 | { | |
887 | return 0; | |
888 | } | |
889 | ||
c31e5f9f SH |
890 | void efx_channel_dummy_op_void(struct efx_channel *channel) |
891 | { | |
892 | } | |
893 | ||
8ceee660 BH |
894 | /************************************************************************** |
895 | * | |
896 | * Port handling | |
897 | * | |
898 | **************************************************************************/ | |
899 | ||
900 | /* This ensures that the kernel is kept informed (via | |
901 | * netif_carrier_on/off) of the link status, and also maintains the | |
902 | * link status's stop on the port's TX queue. | |
903 | */ | |
fdaa9aed | 904 | void efx_link_status_changed(struct efx_nic *efx) |
8ceee660 | 905 | { |
eb50c0d6 BH |
906 | struct efx_link_state *link_state = &efx->link_state; |
907 | ||
8ceee660 BH |
908 | /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure |
909 | * that no events are triggered between unregister_netdev() and the | |
910 | * driver unloading. A more general condition is that NETDEV_CHANGE | |
911 | * can only be generated between NETDEV_UP and NETDEV_DOWN */ | |
912 | if (!netif_running(efx->net_dev)) | |
913 | return; | |
914 | ||
eb50c0d6 | 915 | if (link_state->up != netif_carrier_ok(efx->net_dev)) { |
8ceee660 BH |
916 | efx->n_link_state_changes++; |
917 | ||
eb50c0d6 | 918 | if (link_state->up) |
8ceee660 BH |
919 | netif_carrier_on(efx->net_dev); |
920 | else | |
921 | netif_carrier_off(efx->net_dev); | |
922 | } | |
923 | ||
924 | /* Status message for kernel log */ | |
2aa9ef11 | 925 | if (link_state->up) |
62776d03 BH |
926 | netif_info(efx, link, efx->net_dev, |
927 | "link up at %uMbps %s-duplex (MTU %d)%s\n", | |
928 | link_state->speed, link_state->fd ? "full" : "half", | |
929 | efx->net_dev->mtu, | |
930 | (efx->promiscuous ? " [PROMISC]" : "")); | |
2aa9ef11 | 931 | else |
62776d03 | 932 | netif_info(efx, link, efx->net_dev, "link down\n"); |
8ceee660 BH |
933 | } |
934 | ||
d3245b28 BH |
935 | void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) |
936 | { | |
937 | efx->link_advertising = advertising; | |
938 | if (advertising) { | |
939 | if (advertising & ADVERTISED_Pause) | |
940 | efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); | |
941 | else | |
942 | efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); | |
943 | if (advertising & ADVERTISED_Asym_Pause) | |
944 | efx->wanted_fc ^= EFX_FC_TX; | |
945 | } | |
946 | } | |
947 | ||
b5626946 | 948 | void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) |
d3245b28 BH |
949 | { |
950 | efx->wanted_fc = wanted_fc; | |
951 | if (efx->link_advertising) { | |
952 | if (wanted_fc & EFX_FC_RX) | |
953 | efx->link_advertising |= (ADVERTISED_Pause | | |
954 | ADVERTISED_Asym_Pause); | |
955 | else | |
956 | efx->link_advertising &= ~(ADVERTISED_Pause | | |
957 | ADVERTISED_Asym_Pause); | |
958 | if (wanted_fc & EFX_FC_TX) | |
959 | efx->link_advertising ^= ADVERTISED_Asym_Pause; | |
960 | } | |
961 | } | |
962 | ||
115122af BH |
963 | static void efx_fini_port(struct efx_nic *efx); |
964 | ||
d3245b28 BH |
965 | /* Push loopback/power/transmit disable settings to the PHY, and reconfigure |
966 | * the MAC appropriately. All other PHY configuration changes are pushed | |
967 | * through phy_op->set_settings(), and pushed asynchronously to the MAC | |
968 | * through efx_monitor(). | |
969 | * | |
970 | * Callers must hold the mac_lock | |
971 | */ | |
972 | int __efx_reconfigure_port(struct efx_nic *efx) | |
8ceee660 | 973 | { |
d3245b28 BH |
974 | enum efx_phy_mode phy_mode; |
975 | int rc; | |
8ceee660 | 976 | |
d3245b28 | 977 | WARN_ON(!mutex_is_locked(&efx->mac_lock)); |
8ceee660 | 978 | |
0fca8c97 | 979 | /* Serialise the promiscuous flag with efx_set_rx_mode. */ |
73ba7b68 BH |
980 | netif_addr_lock_bh(efx->net_dev); |
981 | netif_addr_unlock_bh(efx->net_dev); | |
a816f75a | 982 | |
d3245b28 BH |
983 | /* Disable PHY transmit in mac level loopbacks */ |
984 | phy_mode = efx->phy_mode; | |
177dfcd8 BH |
985 | if (LOOPBACK_INTERNAL(efx)) |
986 | efx->phy_mode |= PHY_MODE_TX_DISABLED; | |
987 | else | |
988 | efx->phy_mode &= ~PHY_MODE_TX_DISABLED; | |
177dfcd8 | 989 | |
d3245b28 | 990 | rc = efx->type->reconfigure_port(efx); |
8ceee660 | 991 | |
d3245b28 BH |
992 | if (rc) |
993 | efx->phy_mode = phy_mode; | |
177dfcd8 | 994 | |
d3245b28 | 995 | return rc; |
8ceee660 BH |
996 | } |
997 | ||
998 | /* Reinitialise the MAC to pick up new PHY settings, even if the port is | |
999 | * disabled. */ | |
d3245b28 | 1000 | int efx_reconfigure_port(struct efx_nic *efx) |
8ceee660 | 1001 | { |
d3245b28 BH |
1002 | int rc; |
1003 | ||
8ceee660 BH |
1004 | EFX_ASSERT_RESET_SERIALISED(efx); |
1005 | ||
1006 | mutex_lock(&efx->mac_lock); | |
d3245b28 | 1007 | rc = __efx_reconfigure_port(efx); |
8ceee660 | 1008 | mutex_unlock(&efx->mac_lock); |
d3245b28 BH |
1009 | |
1010 | return rc; | |
8ceee660 BH |
1011 | } |
1012 | ||
8be4f3e6 BH |
1013 | /* Asynchronous work item for changing MAC promiscuity and multicast |
1014 | * hash. Avoid a drain/rx_ingress enable by reconfiguring the current | |
1015 | * MAC directly. */ | |
766ca0fa BH |
1016 | static void efx_mac_work(struct work_struct *data) |
1017 | { | |
1018 | struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); | |
1019 | ||
1020 | mutex_lock(&efx->mac_lock); | |
30b81cda | 1021 | if (efx->port_enabled) |
710b208d | 1022 | efx->type->reconfigure_mac(efx); |
766ca0fa BH |
1023 | mutex_unlock(&efx->mac_lock); |
1024 | } | |
1025 | ||
8ceee660 BH |
1026 | static int efx_probe_port(struct efx_nic *efx) |
1027 | { | |
1028 | int rc; | |
1029 | ||
62776d03 | 1030 | netif_dbg(efx, probe, efx->net_dev, "create port\n"); |
8ceee660 | 1031 | |
ff3b00a0 SH |
1032 | if (phy_flash_cfg) |
1033 | efx->phy_mode = PHY_MODE_SPECIAL; | |
1034 | ||
ef2b90ee BH |
1035 | /* Connect up MAC/PHY operations table */ |
1036 | rc = efx->type->probe_port(efx); | |
8ceee660 | 1037 | if (rc) |
e42de262 | 1038 | return rc; |
8ceee660 | 1039 | |
e332bcb3 BH |
1040 | /* Initialise MAC address to permanent address */ |
1041 | memcpy(efx->net_dev->dev_addr, efx->net_dev->perm_addr, ETH_ALEN); | |
8ceee660 BH |
1042 | |
1043 | return 0; | |
8ceee660 BH |
1044 | } |
1045 | ||
1046 | static int efx_init_port(struct efx_nic *efx) | |
1047 | { | |
1048 | int rc; | |
1049 | ||
62776d03 | 1050 | netif_dbg(efx, drv, efx->net_dev, "init port\n"); |
8ceee660 | 1051 | |
1dfc5cea BH |
1052 | mutex_lock(&efx->mac_lock); |
1053 | ||
177dfcd8 | 1054 | rc = efx->phy_op->init(efx); |
8ceee660 | 1055 | if (rc) |
1dfc5cea | 1056 | goto fail1; |
8ceee660 | 1057 | |
dc8cfa55 | 1058 | efx->port_initialized = true; |
1dfc5cea | 1059 | |
d3245b28 BH |
1060 | /* Reconfigure the MAC before creating dma queues (required for |
1061 | * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ | |
710b208d | 1062 | efx->type->reconfigure_mac(efx); |
d3245b28 BH |
1063 | |
1064 | /* Ensure the PHY advertises the correct flow control settings */ | |
1065 | rc = efx->phy_op->reconfigure(efx); | |
1066 | if (rc) | |
1067 | goto fail2; | |
1068 | ||
1dfc5cea | 1069 | mutex_unlock(&efx->mac_lock); |
8ceee660 | 1070 | return 0; |
177dfcd8 | 1071 | |
1dfc5cea | 1072 | fail2: |
177dfcd8 | 1073 | efx->phy_op->fini(efx); |
1dfc5cea BH |
1074 | fail1: |
1075 | mutex_unlock(&efx->mac_lock); | |
177dfcd8 | 1076 | return rc; |
8ceee660 BH |
1077 | } |
1078 | ||
8ceee660 BH |
1079 | static void efx_start_port(struct efx_nic *efx) |
1080 | { | |
62776d03 | 1081 | netif_dbg(efx, ifup, efx->net_dev, "start port\n"); |
8ceee660 BH |
1082 | BUG_ON(efx->port_enabled); |
1083 | ||
1084 | mutex_lock(&efx->mac_lock); | |
dc8cfa55 | 1085 | efx->port_enabled = true; |
8be4f3e6 BH |
1086 | |
1087 | /* efx_mac_work() might have been scheduled after efx_stop_port(), | |
1088 | * and then cancelled by efx_flush_all() */ | |
710b208d | 1089 | efx->type->reconfigure_mac(efx); |
8be4f3e6 | 1090 | |
8ceee660 BH |
1091 | mutex_unlock(&efx->mac_lock); |
1092 | } | |
1093 | ||
fdaa9aed | 1094 | /* Prevent efx_mac_work() and efx_monitor() from working */ |
8ceee660 BH |
1095 | static void efx_stop_port(struct efx_nic *efx) |
1096 | { | |
62776d03 | 1097 | netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); |
8ceee660 BH |
1098 | |
1099 | mutex_lock(&efx->mac_lock); | |
dc8cfa55 | 1100 | efx->port_enabled = false; |
8ceee660 BH |
1101 | mutex_unlock(&efx->mac_lock); |
1102 | ||
1103 | /* Serialise against efx_set_multicast_list() */ | |
73ba7b68 BH |
1104 | netif_addr_lock_bh(efx->net_dev); |
1105 | netif_addr_unlock_bh(efx->net_dev); | |
8ceee660 BH |
1106 | } |
1107 | ||
1108 | static void efx_fini_port(struct efx_nic *efx) | |
1109 | { | |
62776d03 | 1110 | netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); |
8ceee660 BH |
1111 | |
1112 | if (!efx->port_initialized) | |
1113 | return; | |
1114 | ||
177dfcd8 | 1115 | efx->phy_op->fini(efx); |
dc8cfa55 | 1116 | efx->port_initialized = false; |
8ceee660 | 1117 | |
eb50c0d6 | 1118 | efx->link_state.up = false; |
8ceee660 BH |
1119 | efx_link_status_changed(efx); |
1120 | } | |
1121 | ||
1122 | static void efx_remove_port(struct efx_nic *efx) | |
1123 | { | |
62776d03 | 1124 | netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); |
8ceee660 | 1125 | |
ef2b90ee | 1126 | efx->type->remove_port(efx); |
8ceee660 BH |
1127 | } |
1128 | ||
1129 | /************************************************************************** | |
1130 | * | |
1131 | * NIC handling | |
1132 | * | |
1133 | **************************************************************************/ | |
1134 | ||
1135 | /* This configures the PCI device to enable I/O and DMA. */ | |
1136 | static int efx_init_io(struct efx_nic *efx) | |
1137 | { | |
1138 | struct pci_dev *pci_dev = efx->pci_dev; | |
1139 | dma_addr_t dma_mask = efx->type->max_dma_mask; | |
1140 | int rc; | |
1141 | ||
62776d03 | 1142 | netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); |
8ceee660 BH |
1143 | |
1144 | rc = pci_enable_device(pci_dev); | |
1145 | if (rc) { | |
62776d03 BH |
1146 | netif_err(efx, probe, efx->net_dev, |
1147 | "failed to enable PCI device\n"); | |
8ceee660 BH |
1148 | goto fail1; |
1149 | } | |
1150 | ||
1151 | pci_set_master(pci_dev); | |
1152 | ||
1153 | /* Set the PCI DMA mask. Try all possibilities from our | |
1154 | * genuine mask down to 32 bits, because some architectures | |
1155 | * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit | |
1156 | * masks event though they reject 46 bit masks. | |
1157 | */ | |
1158 | while (dma_mask > 0x7fffffffUL) { | |
0e33d870 BH |
1159 | if (dma_supported(&pci_dev->dev, dma_mask)) { |
1160 | rc = dma_set_mask(&pci_dev->dev, dma_mask); | |
e9e01846 BH |
1161 | if (rc == 0) |
1162 | break; | |
1163 | } | |
8ceee660 BH |
1164 | dma_mask >>= 1; |
1165 | } | |
1166 | if (rc) { | |
62776d03 BH |
1167 | netif_err(efx, probe, efx->net_dev, |
1168 | "could not find a suitable DMA mask\n"); | |
8ceee660 BH |
1169 | goto fail2; |
1170 | } | |
62776d03 BH |
1171 | netif_dbg(efx, probe, efx->net_dev, |
1172 | "using DMA mask %llx\n", (unsigned long long) dma_mask); | |
0e33d870 | 1173 | rc = dma_set_coherent_mask(&pci_dev->dev, dma_mask); |
8ceee660 | 1174 | if (rc) { |
0e33d870 BH |
1175 | /* dma_set_coherent_mask() is not *allowed* to |
1176 | * fail with a mask that dma_set_mask() accepted, | |
8ceee660 BH |
1177 | * but just in case... |
1178 | */ | |
62776d03 BH |
1179 | netif_err(efx, probe, efx->net_dev, |
1180 | "failed to set consistent DMA mask\n"); | |
8ceee660 BH |
1181 | goto fail2; |
1182 | } | |
1183 | ||
dc803df8 BH |
1184 | efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR); |
1185 | rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc"); | |
8ceee660 | 1186 | if (rc) { |
62776d03 BH |
1187 | netif_err(efx, probe, efx->net_dev, |
1188 | "request for memory BAR failed\n"); | |
8ceee660 BH |
1189 | rc = -EIO; |
1190 | goto fail3; | |
1191 | } | |
86c432ca BH |
1192 | efx->membase = ioremap_nocache(efx->membase_phys, |
1193 | efx->type->mem_map_size); | |
8ceee660 | 1194 | if (!efx->membase) { |
62776d03 BH |
1195 | netif_err(efx, probe, efx->net_dev, |
1196 | "could not map memory BAR at %llx+%x\n", | |
1197 | (unsigned long long)efx->membase_phys, | |
1198 | efx->type->mem_map_size); | |
8ceee660 BH |
1199 | rc = -ENOMEM; |
1200 | goto fail4; | |
1201 | } | |
62776d03 BH |
1202 | netif_dbg(efx, probe, efx->net_dev, |
1203 | "memory BAR at %llx+%x (virtual %p)\n", | |
1204 | (unsigned long long)efx->membase_phys, | |
1205 | efx->type->mem_map_size, efx->membase); | |
8ceee660 BH |
1206 | |
1207 | return 0; | |
1208 | ||
1209 | fail4: | |
dc803df8 | 1210 | pci_release_region(efx->pci_dev, EFX_MEM_BAR); |
8ceee660 | 1211 | fail3: |
2c118e0f | 1212 | efx->membase_phys = 0; |
8ceee660 BH |
1213 | fail2: |
1214 | pci_disable_device(efx->pci_dev); | |
1215 | fail1: | |
1216 | return rc; | |
1217 | } | |
1218 | ||
1219 | static void efx_fini_io(struct efx_nic *efx) | |
1220 | { | |
62776d03 | 1221 | netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); |
8ceee660 BH |
1222 | |
1223 | if (efx->membase) { | |
1224 | iounmap(efx->membase); | |
1225 | efx->membase = NULL; | |
1226 | } | |
1227 | ||
1228 | if (efx->membase_phys) { | |
dc803df8 | 1229 | pci_release_region(efx->pci_dev, EFX_MEM_BAR); |
2c118e0f | 1230 | efx->membase_phys = 0; |
8ceee660 BH |
1231 | } |
1232 | ||
1233 | pci_disable_device(efx->pci_dev); | |
1234 | } | |
1235 | ||
a9a52506 | 1236 | static unsigned int efx_wanted_parallelism(struct efx_nic *efx) |
46123d04 | 1237 | { |
cdb08f8f | 1238 | cpumask_var_t thread_mask; |
a16e5b24 | 1239 | unsigned int count; |
46123d04 | 1240 | int cpu; |
5b874e25 | 1241 | |
cd2d5b52 BH |
1242 | if (rss_cpus) { |
1243 | count = rss_cpus; | |
1244 | } else { | |
1245 | if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { | |
1246 | netif_warn(efx, probe, efx->net_dev, | |
1247 | "RSS disabled due to allocation failure\n"); | |
1248 | return 1; | |
1249 | } | |
46123d04 | 1250 | |
cd2d5b52 BH |
1251 | count = 0; |
1252 | for_each_online_cpu(cpu) { | |
1253 | if (!cpumask_test_cpu(cpu, thread_mask)) { | |
1254 | ++count; | |
1255 | cpumask_or(thread_mask, thread_mask, | |
1256 | topology_thread_cpumask(cpu)); | |
1257 | } | |
1258 | } | |
1259 | ||
1260 | free_cpumask_var(thread_mask); | |
2f8975fb RR |
1261 | } |
1262 | ||
cd2d5b52 BH |
1263 | /* If RSS is requested for the PF *and* VFs then we can't write RSS |
1264 | * table entries that are inaccessible to VFs | |
1265 | */ | |
1266 | if (efx_sriov_wanted(efx) && efx_vf_size(efx) > 1 && | |
1267 | count > efx_vf_size(efx)) { | |
1268 | netif_warn(efx, probe, efx->net_dev, | |
1269 | "Reducing number of RSS channels from %u to %u for " | |
1270 | "VF support. Increase vf-msix-limit to use more " | |
1271 | "channels on the PF.\n", | |
1272 | count, efx_vf_size(efx)); | |
1273 | count = efx_vf_size(efx); | |
46123d04 BH |
1274 | } |
1275 | ||
1276 | return count; | |
1277 | } | |
1278 | ||
64d8ad6d BH |
1279 | static int |
1280 | efx_init_rx_cpu_rmap(struct efx_nic *efx, struct msix_entry *xentries) | |
1281 | { | |
1282 | #ifdef CONFIG_RFS_ACCEL | |
a16e5b24 BH |
1283 | unsigned int i; |
1284 | int rc; | |
64d8ad6d BH |
1285 | |
1286 | efx->net_dev->rx_cpu_rmap = alloc_irq_cpu_rmap(efx->n_rx_channels); | |
1287 | if (!efx->net_dev->rx_cpu_rmap) | |
1288 | return -ENOMEM; | |
1289 | for (i = 0; i < efx->n_rx_channels; i++) { | |
1290 | rc = irq_cpu_rmap_add(efx->net_dev->rx_cpu_rmap, | |
1291 | xentries[i].vector); | |
1292 | if (rc) { | |
1293 | free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap); | |
1294 | efx->net_dev->rx_cpu_rmap = NULL; | |
1295 | return rc; | |
1296 | } | |
1297 | } | |
1298 | #endif | |
1299 | return 0; | |
1300 | } | |
1301 | ||
46123d04 BH |
1302 | /* Probe the number and type of interrupts we are able to obtain, and |
1303 | * the resulting numbers of channels and RX queues. | |
1304 | */ | |
64d8ad6d | 1305 | static int efx_probe_interrupts(struct efx_nic *efx) |
8ceee660 | 1306 | { |
a16e5b24 BH |
1307 | unsigned int max_channels = |
1308 | min(efx->type->phys_addr_channels, EFX_MAX_CHANNELS); | |
7f967c01 BH |
1309 | unsigned int extra_channels = 0; |
1310 | unsigned int i, j; | |
a16e5b24 | 1311 | int rc; |
8ceee660 | 1312 | |
7f967c01 BH |
1313 | for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) |
1314 | if (efx->extra_channel_type[i]) | |
1315 | ++extra_channels; | |
1316 | ||
8ceee660 | 1317 | if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { |
46123d04 | 1318 | struct msix_entry xentries[EFX_MAX_CHANNELS]; |
a16e5b24 | 1319 | unsigned int n_channels; |
aa6ef27e | 1320 | |
a9a52506 | 1321 | n_channels = efx_wanted_parallelism(efx); |
a4900ac9 BH |
1322 | if (separate_tx_channels) |
1323 | n_channels *= 2; | |
7f967c01 | 1324 | n_channels += extra_channels; |
a4900ac9 | 1325 | n_channels = min(n_channels, max_channels); |
8ceee660 | 1326 | |
a4900ac9 | 1327 | for (i = 0; i < n_channels; i++) |
8ceee660 | 1328 | xentries[i].entry = i; |
a4900ac9 | 1329 | rc = pci_enable_msix(efx->pci_dev, xentries, n_channels); |
8ceee660 | 1330 | if (rc > 0) { |
62776d03 BH |
1331 | netif_err(efx, drv, efx->net_dev, |
1332 | "WARNING: Insufficient MSI-X vectors" | |
a16e5b24 | 1333 | " available (%d < %u).\n", rc, n_channels); |
62776d03 BH |
1334 | netif_err(efx, drv, efx->net_dev, |
1335 | "WARNING: Performance may be reduced.\n"); | |
a4900ac9 BH |
1336 | EFX_BUG_ON_PARANOID(rc >= n_channels); |
1337 | n_channels = rc; | |
8ceee660 | 1338 | rc = pci_enable_msix(efx->pci_dev, xentries, |
a4900ac9 | 1339 | n_channels); |
8ceee660 BH |
1340 | } |
1341 | ||
1342 | if (rc == 0) { | |
a4900ac9 | 1343 | efx->n_channels = n_channels; |
7f967c01 BH |
1344 | if (n_channels > extra_channels) |
1345 | n_channels -= extra_channels; | |
a4900ac9 | 1346 | if (separate_tx_channels) { |
7f967c01 BH |
1347 | efx->n_tx_channels = max(n_channels / 2, 1U); |
1348 | efx->n_rx_channels = max(n_channels - | |
1349 | efx->n_tx_channels, | |
1350 | 1U); | |
a4900ac9 | 1351 | } else { |
7f967c01 BH |
1352 | efx->n_tx_channels = n_channels; |
1353 | efx->n_rx_channels = n_channels; | |
a4900ac9 | 1354 | } |
64d8ad6d BH |
1355 | rc = efx_init_rx_cpu_rmap(efx, xentries); |
1356 | if (rc) { | |
1357 | pci_disable_msix(efx->pci_dev); | |
1358 | return rc; | |
1359 | } | |
7f967c01 | 1360 | for (i = 0; i < efx->n_channels; i++) |
f7d12cdc BH |
1361 | efx_get_channel(efx, i)->irq = |
1362 | xentries[i].vector; | |
8ceee660 BH |
1363 | } else { |
1364 | /* Fall back to single channel MSI */ | |
1365 | efx->interrupt_mode = EFX_INT_MODE_MSI; | |
62776d03 BH |
1366 | netif_err(efx, drv, efx->net_dev, |
1367 | "could not enable MSI-X\n"); | |
8ceee660 BH |
1368 | } |
1369 | } | |
1370 | ||
1371 | /* Try single interrupt MSI */ | |
1372 | if (efx->interrupt_mode == EFX_INT_MODE_MSI) { | |
28b581ab | 1373 | efx->n_channels = 1; |
a4900ac9 BH |
1374 | efx->n_rx_channels = 1; |
1375 | efx->n_tx_channels = 1; | |
8ceee660 BH |
1376 | rc = pci_enable_msi(efx->pci_dev); |
1377 | if (rc == 0) { | |
f7d12cdc | 1378 | efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; |
8ceee660 | 1379 | } else { |
62776d03 BH |
1380 | netif_err(efx, drv, efx->net_dev, |
1381 | "could not enable MSI\n"); | |
8ceee660 BH |
1382 | efx->interrupt_mode = EFX_INT_MODE_LEGACY; |
1383 | } | |
1384 | } | |
1385 | ||
1386 | /* Assume legacy interrupts */ | |
1387 | if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { | |
28b581ab | 1388 | efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); |
a4900ac9 BH |
1389 | efx->n_rx_channels = 1; |
1390 | efx->n_tx_channels = 1; | |
8ceee660 BH |
1391 | efx->legacy_irq = efx->pci_dev->irq; |
1392 | } | |
64d8ad6d | 1393 | |
7f967c01 BH |
1394 | /* Assign extra channels if possible */ |
1395 | j = efx->n_channels; | |
1396 | for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { | |
1397 | if (!efx->extra_channel_type[i]) | |
1398 | continue; | |
1399 | if (efx->interrupt_mode != EFX_INT_MODE_MSIX || | |
1400 | efx->n_channels <= extra_channels) { | |
1401 | efx->extra_channel_type[i]->handle_no_channel(efx); | |
1402 | } else { | |
1403 | --j; | |
1404 | efx_get_channel(efx, j)->type = | |
1405 | efx->extra_channel_type[i]; | |
1406 | } | |
1407 | } | |
1408 | ||
cd2d5b52 | 1409 | /* RSS might be usable on VFs even if it is disabled on the PF */ |
3132d282 | 1410 | efx->rss_spread = ((efx->n_rx_channels > 1 || !efx_sriov_wanted(efx)) ? |
cd2d5b52 BH |
1411 | efx->n_rx_channels : efx_vf_size(efx)); |
1412 | ||
64d8ad6d | 1413 | return 0; |
8ceee660 BH |
1414 | } |
1415 | ||
9f2cb71c | 1416 | /* Enable interrupts, then probe and start the event queues */ |
7f967c01 | 1417 | static void efx_start_interrupts(struct efx_nic *efx, bool may_keep_eventq) |
9f2cb71c BH |
1418 | { |
1419 | struct efx_channel *channel; | |
1420 | ||
8b7325b4 BH |
1421 | BUG_ON(efx->state == STATE_DISABLED); |
1422 | ||
9f2cb71c BH |
1423 | if (efx->legacy_irq) |
1424 | efx->legacy_irq_enabled = true; | |
1425 | efx_nic_enable_interrupts(efx); | |
1426 | ||
1427 | efx_for_each_channel(channel, efx) { | |
7f967c01 BH |
1428 | if (!channel->type->keep_eventq || !may_keep_eventq) |
1429 | efx_init_eventq(channel); | |
9f2cb71c BH |
1430 | efx_start_eventq(channel); |
1431 | } | |
1432 | ||
1433 | efx_mcdi_mode_event(efx); | |
1434 | } | |
1435 | ||
7f967c01 | 1436 | static void efx_stop_interrupts(struct efx_nic *efx, bool may_keep_eventq) |
9f2cb71c BH |
1437 | { |
1438 | struct efx_channel *channel; | |
1439 | ||
8b7325b4 BH |
1440 | if (efx->state == STATE_DISABLED) |
1441 | return; | |
1442 | ||
9f2cb71c BH |
1443 | efx_mcdi_mode_poll(efx); |
1444 | ||
1445 | efx_nic_disable_interrupts(efx); | |
1446 | if (efx->legacy_irq) { | |
1447 | synchronize_irq(efx->legacy_irq); | |
1448 | efx->legacy_irq_enabled = false; | |
1449 | } | |
1450 | ||
1451 | efx_for_each_channel(channel, efx) { | |
1452 | if (channel->irq) | |
1453 | synchronize_irq(channel->irq); | |
1454 | ||
1455 | efx_stop_eventq(channel); | |
7f967c01 BH |
1456 | if (!channel->type->keep_eventq || !may_keep_eventq) |
1457 | efx_fini_eventq(channel); | |
9f2cb71c BH |
1458 | } |
1459 | } | |
1460 | ||
8ceee660 BH |
1461 | static void efx_remove_interrupts(struct efx_nic *efx) |
1462 | { | |
1463 | struct efx_channel *channel; | |
1464 | ||
1465 | /* Remove MSI/MSI-X interrupts */ | |
64ee3120 | 1466 | efx_for_each_channel(channel, efx) |
8ceee660 BH |
1467 | channel->irq = 0; |
1468 | pci_disable_msi(efx->pci_dev); | |
1469 | pci_disable_msix(efx->pci_dev); | |
1470 | ||
1471 | /* Remove legacy interrupt */ | |
1472 | efx->legacy_irq = 0; | |
1473 | } | |
1474 | ||
8831da7b | 1475 | static void efx_set_channels(struct efx_nic *efx) |
8ceee660 | 1476 | { |
602a5322 BH |
1477 | struct efx_channel *channel; |
1478 | struct efx_tx_queue *tx_queue; | |
1479 | ||
97653431 | 1480 | efx->tx_channel_offset = |
a4900ac9 | 1481 | separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0; |
602a5322 | 1482 | |
79d68b37 SH |
1483 | /* We need to mark which channels really have RX and TX |
1484 | * queues, and adjust the TX queue numbers if we have separate | |
602a5322 BH |
1485 | * RX-only and TX-only channels. |
1486 | */ | |
1487 | efx_for_each_channel(channel, efx) { | |
79d68b37 SH |
1488 | if (channel->channel < efx->n_rx_channels) |
1489 | channel->rx_queue.core_index = channel->channel; | |
1490 | else | |
1491 | channel->rx_queue.core_index = -1; | |
1492 | ||
602a5322 BH |
1493 | efx_for_each_channel_tx_queue(tx_queue, channel) |
1494 | tx_queue->queue -= (efx->tx_channel_offset * | |
1495 | EFX_TXQ_TYPES); | |
1496 | } | |
8ceee660 BH |
1497 | } |
1498 | ||
1499 | static int efx_probe_nic(struct efx_nic *efx) | |
1500 | { | |
765c9f46 | 1501 | size_t i; |
8ceee660 BH |
1502 | int rc; |
1503 | ||
62776d03 | 1504 | netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); |
8ceee660 BH |
1505 | |
1506 | /* Carry out hardware-type specific initialisation */ | |
ef2b90ee | 1507 | rc = efx->type->probe(efx); |
8ceee660 BH |
1508 | if (rc) |
1509 | return rc; | |
1510 | ||
a4900ac9 | 1511 | /* Determine the number of channels and queues by trying to hook |
8ceee660 | 1512 | * in MSI-X interrupts. */ |
64d8ad6d BH |
1513 | rc = efx_probe_interrupts(efx); |
1514 | if (rc) | |
1515 | goto fail; | |
8ceee660 | 1516 | |
28e47c49 BH |
1517 | efx->type->dimension_resources(efx); |
1518 | ||
5d3a6fca BH |
1519 | if (efx->n_channels > 1) |
1520 | get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key)); | |
765c9f46 | 1521 | for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) |
278bc429 | 1522 | efx->rx_indir_table[i] = |
cd2d5b52 | 1523 | ethtool_rxfh_indir_default(i, efx->rss_spread); |
5d3a6fca | 1524 | |
8831da7b | 1525 | efx_set_channels(efx); |
c4f4adc7 BH |
1526 | netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); |
1527 | netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); | |
8ceee660 BH |
1528 | |
1529 | /* Initialise the interrupt moderation settings */ | |
9e393b30 BH |
1530 | efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, |
1531 | true); | |
8ceee660 BH |
1532 | |
1533 | return 0; | |
64d8ad6d BH |
1534 | |
1535 | fail: | |
1536 | efx->type->remove(efx); | |
1537 | return rc; | |
8ceee660 BH |
1538 | } |
1539 | ||
1540 | static void efx_remove_nic(struct efx_nic *efx) | |
1541 | { | |
62776d03 | 1542 | netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); |
8ceee660 BH |
1543 | |
1544 | efx_remove_interrupts(efx); | |
ef2b90ee | 1545 | efx->type->remove(efx); |
8ceee660 BH |
1546 | } |
1547 | ||
1548 | /************************************************************************** | |
1549 | * | |
1550 | * NIC startup/shutdown | |
1551 | * | |
1552 | *************************************************************************/ | |
1553 | ||
1554 | static int efx_probe_all(struct efx_nic *efx) | |
1555 | { | |
8ceee660 BH |
1556 | int rc; |
1557 | ||
8ceee660 BH |
1558 | rc = efx_probe_nic(efx); |
1559 | if (rc) { | |
62776d03 | 1560 | netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); |
8ceee660 BH |
1561 | goto fail1; |
1562 | } | |
1563 | ||
8ceee660 BH |
1564 | rc = efx_probe_port(efx); |
1565 | if (rc) { | |
62776d03 | 1566 | netif_err(efx, probe, efx->net_dev, "failed to create port\n"); |
8ceee660 BH |
1567 | goto fail2; |
1568 | } | |
1569 | ||
7e6d06f0 BH |
1570 | BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); |
1571 | if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { | |
1572 | rc = -EINVAL; | |
1573 | goto fail3; | |
1574 | } | |
ecc910f5 | 1575 | efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; |
8ceee660 | 1576 | |
64eebcfd BH |
1577 | rc = efx_probe_filters(efx); |
1578 | if (rc) { | |
1579 | netif_err(efx, probe, efx->net_dev, | |
1580 | "failed to create filter tables\n"); | |
7f967c01 | 1581 | goto fail3; |
64eebcfd BH |
1582 | } |
1583 | ||
7f967c01 BH |
1584 | rc = efx_probe_channels(efx); |
1585 | if (rc) | |
1586 | goto fail4; | |
1587 | ||
8ceee660 BH |
1588 | return 0; |
1589 | ||
64eebcfd | 1590 | fail4: |
7f967c01 | 1591 | efx_remove_filters(efx); |
8ceee660 | 1592 | fail3: |
8ceee660 BH |
1593 | efx_remove_port(efx); |
1594 | fail2: | |
1595 | efx_remove_nic(efx); | |
1596 | fail1: | |
1597 | return rc; | |
1598 | } | |
1599 | ||
8b7325b4 BH |
1600 | /* If the interface is supposed to be running but is not, start |
1601 | * the hardware and software data path, regular activity for the port | |
1602 | * (MAC statistics, link polling, etc.) and schedule the port to be | |
1603 | * reconfigured. Interrupts must already be enabled. This function | |
1604 | * is safe to call multiple times, so long as the NIC is not disabled. | |
1605 | * Requires the RTNL lock. | |
9f2cb71c | 1606 | */ |
8ceee660 BH |
1607 | static void efx_start_all(struct efx_nic *efx) |
1608 | { | |
8ceee660 | 1609 | EFX_ASSERT_RESET_SERIALISED(efx); |
8b7325b4 | 1610 | BUG_ON(efx->state == STATE_DISABLED); |
8ceee660 BH |
1611 | |
1612 | /* Check that it is appropriate to restart the interface. All | |
1613 | * of these flags are safe to read under just the rtnl lock */ | |
8b7325b4 | 1614 | if (efx->port_enabled || !netif_running(efx->net_dev)) |
8ceee660 BH |
1615 | return; |
1616 | ||
8ceee660 | 1617 | efx_start_port(efx); |
9f2cb71c | 1618 | efx_start_datapath(efx); |
8880f4ec | 1619 | |
626950db AR |
1620 | /* Start the hardware monitor if there is one */ |
1621 | if (efx->type->monitor != NULL) | |
8ceee660 BH |
1622 | queue_delayed_work(efx->workqueue, &efx->monitor_work, |
1623 | efx_monitor_interval); | |
626950db AR |
1624 | |
1625 | /* If link state detection is normally event-driven, we have | |
1626 | * to poll now because we could have missed a change | |
1627 | */ | |
1628 | if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) { | |
78c1f0a0 SH |
1629 | mutex_lock(&efx->mac_lock); |
1630 | if (efx->phy_op->poll(efx)) | |
1631 | efx_link_status_changed(efx); | |
1632 | mutex_unlock(&efx->mac_lock); | |
1633 | } | |
55edc6e6 | 1634 | |
ef2b90ee | 1635 | efx->type->start_stats(efx); |
8ceee660 BH |
1636 | } |
1637 | ||
1638 | /* Flush all delayed work. Should only be called when no more delayed work | |
1639 | * will be scheduled. This doesn't flush pending online resets (efx_reset), | |
1640 | * since we're holding the rtnl_lock at this point. */ | |
1641 | static void efx_flush_all(struct efx_nic *efx) | |
1642 | { | |
dd40781e | 1643 | /* Make sure the hardware monitor and event self-test are stopped */ |
8ceee660 | 1644 | cancel_delayed_work_sync(&efx->monitor_work); |
dd40781e | 1645 | efx_selftest_async_cancel(efx); |
8ceee660 | 1646 | /* Stop scheduled port reconfigurations */ |
766ca0fa | 1647 | cancel_work_sync(&efx->mac_work); |
8ceee660 BH |
1648 | } |
1649 | ||
8b7325b4 BH |
1650 | /* Quiesce the hardware and software data path, and regular activity |
1651 | * for the port without bringing the link down. Safe to call multiple | |
1652 | * times with the NIC in almost any state, but interrupts should be | |
1653 | * enabled. Requires the RTNL lock. | |
1654 | */ | |
8ceee660 BH |
1655 | static void efx_stop_all(struct efx_nic *efx) |
1656 | { | |
8ceee660 BH |
1657 | EFX_ASSERT_RESET_SERIALISED(efx); |
1658 | ||
1659 | /* port_enabled can be read safely under the rtnl lock */ | |
1660 | if (!efx->port_enabled) | |
1661 | return; | |
1662 | ||
ef2b90ee | 1663 | efx->type->stop_stats(efx); |
8ceee660 BH |
1664 | efx_stop_port(efx); |
1665 | ||
fdaa9aed | 1666 | /* Flush efx_mac_work(), refill_workqueue, monitor_work */ |
8ceee660 BH |
1667 | efx_flush_all(efx); |
1668 | ||
29c69a48 BH |
1669 | /* Stop the kernel transmit interface. This is only valid if |
1670 | * the device is stopped or detached; otherwise the watchdog | |
1671 | * may fire immediately. | |
1672 | */ | |
1673 | WARN_ON(netif_running(efx->net_dev) && | |
1674 | netif_device_present(efx->net_dev)); | |
9f2cb71c BH |
1675 | netif_tx_disable(efx->net_dev); |
1676 | ||
1677 | efx_stop_datapath(efx); | |
8ceee660 BH |
1678 | } |
1679 | ||
1680 | static void efx_remove_all(struct efx_nic *efx) | |
1681 | { | |
4642610c | 1682 | efx_remove_channels(efx); |
7f967c01 | 1683 | efx_remove_filters(efx); |
8ceee660 BH |
1684 | efx_remove_port(efx); |
1685 | efx_remove_nic(efx); | |
1686 | } | |
1687 | ||
8ceee660 BH |
1688 | /************************************************************************** |
1689 | * | |
1690 | * Interrupt moderation | |
1691 | * | |
1692 | **************************************************************************/ | |
1693 | ||
cc180b69 | 1694 | static unsigned int irq_mod_ticks(unsigned int usecs, unsigned int quantum_ns) |
0d86ebd8 | 1695 | { |
b548f976 BH |
1696 | if (usecs == 0) |
1697 | return 0; | |
cc180b69 | 1698 | if (usecs * 1000 < quantum_ns) |
0d86ebd8 | 1699 | return 1; /* never round down to 0 */ |
cc180b69 | 1700 | return usecs * 1000 / quantum_ns; |
0d86ebd8 BH |
1701 | } |
1702 | ||
8ceee660 | 1703 | /* Set interrupt moderation parameters */ |
9e393b30 BH |
1704 | int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, |
1705 | unsigned int rx_usecs, bool rx_adaptive, | |
1706 | bool rx_may_override_tx) | |
8ceee660 | 1707 | { |
f7d12cdc | 1708 | struct efx_channel *channel; |
cc180b69 BH |
1709 | unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max * |
1710 | efx->timer_quantum_ns, | |
1711 | 1000); | |
1712 | unsigned int tx_ticks; | |
1713 | unsigned int rx_ticks; | |
8ceee660 BH |
1714 | |
1715 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1716 | ||
cc180b69 | 1717 | if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max) |
9e393b30 BH |
1718 | return -EINVAL; |
1719 | ||
cc180b69 BH |
1720 | tx_ticks = irq_mod_ticks(tx_usecs, efx->timer_quantum_ns); |
1721 | rx_ticks = irq_mod_ticks(rx_usecs, efx->timer_quantum_ns); | |
1722 | ||
9e393b30 BH |
1723 | if (tx_ticks != rx_ticks && efx->tx_channel_offset == 0 && |
1724 | !rx_may_override_tx) { | |
1725 | netif_err(efx, drv, efx->net_dev, "Channels are shared. " | |
1726 | "RX and TX IRQ moderation must be equal\n"); | |
1727 | return -EINVAL; | |
1728 | } | |
1729 | ||
6fb70fd1 | 1730 | efx->irq_rx_adaptive = rx_adaptive; |
0d86ebd8 | 1731 | efx->irq_rx_moderation = rx_ticks; |
f7d12cdc | 1732 | efx_for_each_channel(channel, efx) { |
525da907 | 1733 | if (efx_channel_has_rx_queue(channel)) |
f7d12cdc | 1734 | channel->irq_moderation = rx_ticks; |
525da907 | 1735 | else if (efx_channel_has_tx_queues(channel)) |
f7d12cdc BH |
1736 | channel->irq_moderation = tx_ticks; |
1737 | } | |
9e393b30 BH |
1738 | |
1739 | return 0; | |
8ceee660 BH |
1740 | } |
1741 | ||
a0c4faf5 BH |
1742 | void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, |
1743 | unsigned int *rx_usecs, bool *rx_adaptive) | |
1744 | { | |
cc180b69 BH |
1745 | /* We must round up when converting ticks to microseconds |
1746 | * because we round down when converting the other way. | |
1747 | */ | |
1748 | ||
a0c4faf5 | 1749 | *rx_adaptive = efx->irq_rx_adaptive; |
cc180b69 BH |
1750 | *rx_usecs = DIV_ROUND_UP(efx->irq_rx_moderation * |
1751 | efx->timer_quantum_ns, | |
1752 | 1000); | |
a0c4faf5 BH |
1753 | |
1754 | /* If channels are shared between RX and TX, so is IRQ | |
1755 | * moderation. Otherwise, IRQ moderation is the same for all | |
1756 | * TX channels and is not adaptive. | |
1757 | */ | |
1758 | if (efx->tx_channel_offset == 0) | |
1759 | *tx_usecs = *rx_usecs; | |
1760 | else | |
cc180b69 | 1761 | *tx_usecs = DIV_ROUND_UP( |
a0c4faf5 | 1762 | efx->channel[efx->tx_channel_offset]->irq_moderation * |
cc180b69 BH |
1763 | efx->timer_quantum_ns, |
1764 | 1000); | |
a0c4faf5 BH |
1765 | } |
1766 | ||
8ceee660 BH |
1767 | /************************************************************************** |
1768 | * | |
1769 | * Hardware monitor | |
1770 | * | |
1771 | **************************************************************************/ | |
1772 | ||
e254c274 | 1773 | /* Run periodically off the general workqueue */ |
8ceee660 BH |
1774 | static void efx_monitor(struct work_struct *data) |
1775 | { | |
1776 | struct efx_nic *efx = container_of(data, struct efx_nic, | |
1777 | monitor_work.work); | |
8ceee660 | 1778 | |
62776d03 BH |
1779 | netif_vdbg(efx, timer, efx->net_dev, |
1780 | "hardware monitor executing on CPU %d\n", | |
1781 | raw_smp_processor_id()); | |
ef2b90ee | 1782 | BUG_ON(efx->type->monitor == NULL); |
8ceee660 | 1783 | |
8ceee660 BH |
1784 | /* If the mac_lock is already held then it is likely a port |
1785 | * reconfiguration is already in place, which will likely do | |
e254c274 BH |
1786 | * most of the work of monitor() anyway. */ |
1787 | if (mutex_trylock(&efx->mac_lock)) { | |
1788 | if (efx->port_enabled) | |
1789 | efx->type->monitor(efx); | |
1790 | mutex_unlock(&efx->mac_lock); | |
1791 | } | |
8ceee660 | 1792 | |
8ceee660 BH |
1793 | queue_delayed_work(efx->workqueue, &efx->monitor_work, |
1794 | efx_monitor_interval); | |
1795 | } | |
1796 | ||
1797 | /************************************************************************** | |
1798 | * | |
1799 | * ioctls | |
1800 | * | |
1801 | *************************************************************************/ | |
1802 | ||
1803 | /* Net device ioctl | |
1804 | * Context: process, rtnl_lock() held. | |
1805 | */ | |
1806 | static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) | |
1807 | { | |
767e468c | 1808 | struct efx_nic *efx = netdev_priv(net_dev); |
68e7f45e | 1809 | struct mii_ioctl_data *data = if_mii(ifr); |
8ceee660 | 1810 | |
7c236c43 SH |
1811 | if (cmd == SIOCSHWTSTAMP) |
1812 | return efx_ptp_ioctl(efx, ifr, cmd); | |
1813 | ||
68e7f45e BH |
1814 | /* Convert phy_id from older PRTAD/DEVAD format */ |
1815 | if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && | |
1816 | (data->phy_id & 0xfc00) == 0x0400) | |
1817 | data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; | |
1818 | ||
1819 | return mdio_mii_ioctl(&efx->mdio, data, cmd); | |
8ceee660 BH |
1820 | } |
1821 | ||
1822 | /************************************************************************** | |
1823 | * | |
1824 | * NAPI interface | |
1825 | * | |
1826 | **************************************************************************/ | |
1827 | ||
7f967c01 BH |
1828 | static void efx_init_napi_channel(struct efx_channel *channel) |
1829 | { | |
1830 | struct efx_nic *efx = channel->efx; | |
1831 | ||
1832 | channel->napi_dev = efx->net_dev; | |
1833 | netif_napi_add(channel->napi_dev, &channel->napi_str, | |
1834 | efx_poll, napi_weight); | |
1835 | } | |
1836 | ||
e8f14992 | 1837 | static void efx_init_napi(struct efx_nic *efx) |
8ceee660 BH |
1838 | { |
1839 | struct efx_channel *channel; | |
8ceee660 | 1840 | |
7f967c01 BH |
1841 | efx_for_each_channel(channel, efx) |
1842 | efx_init_napi_channel(channel); | |
e8f14992 BH |
1843 | } |
1844 | ||
1845 | static void efx_fini_napi_channel(struct efx_channel *channel) | |
1846 | { | |
1847 | if (channel->napi_dev) | |
1848 | netif_napi_del(&channel->napi_str); | |
1849 | channel->napi_dev = NULL; | |
8ceee660 BH |
1850 | } |
1851 | ||
1852 | static void efx_fini_napi(struct efx_nic *efx) | |
1853 | { | |
1854 | struct efx_channel *channel; | |
1855 | ||
e8f14992 BH |
1856 | efx_for_each_channel(channel, efx) |
1857 | efx_fini_napi_channel(channel); | |
8ceee660 BH |
1858 | } |
1859 | ||
1860 | /************************************************************************** | |
1861 | * | |
1862 | * Kernel netpoll interface | |
1863 | * | |
1864 | *************************************************************************/ | |
1865 | ||
1866 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1867 | ||
1868 | /* Although in the common case interrupts will be disabled, this is not | |
1869 | * guaranteed. However, all our work happens inside the NAPI callback, | |
1870 | * so no locking is required. | |
1871 | */ | |
1872 | static void efx_netpoll(struct net_device *net_dev) | |
1873 | { | |
767e468c | 1874 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1875 | struct efx_channel *channel; |
1876 | ||
64ee3120 | 1877 | efx_for_each_channel(channel, efx) |
8ceee660 BH |
1878 | efx_schedule_channel(channel); |
1879 | } | |
1880 | ||
1881 | #endif | |
1882 | ||
1883 | /************************************************************************** | |
1884 | * | |
1885 | * Kernel net device interface | |
1886 | * | |
1887 | *************************************************************************/ | |
1888 | ||
1889 | /* Context: process, rtnl_lock() held. */ | |
1890 | static int efx_net_open(struct net_device *net_dev) | |
1891 | { | |
767e468c | 1892 | struct efx_nic *efx = netdev_priv(net_dev); |
8b7325b4 BH |
1893 | int rc; |
1894 | ||
62776d03 BH |
1895 | netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", |
1896 | raw_smp_processor_id()); | |
8ceee660 | 1897 | |
8b7325b4 BH |
1898 | rc = efx_check_disabled(efx); |
1899 | if (rc) | |
1900 | return rc; | |
f8b87c17 BH |
1901 | if (efx->phy_mode & PHY_MODE_SPECIAL) |
1902 | return -EBUSY; | |
8880f4ec BH |
1903 | if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) |
1904 | return -EIO; | |
f8b87c17 | 1905 | |
78c1f0a0 SH |
1906 | /* Notify the kernel of the link state polled during driver load, |
1907 | * before the monitor starts running */ | |
1908 | efx_link_status_changed(efx); | |
1909 | ||
8ceee660 | 1910 | efx_start_all(efx); |
dd40781e | 1911 | efx_selftest_async_start(efx); |
8ceee660 BH |
1912 | return 0; |
1913 | } | |
1914 | ||
1915 | /* Context: process, rtnl_lock() held. | |
1916 | * Note that the kernel will ignore our return code; this method | |
1917 | * should really be a void. | |
1918 | */ | |
1919 | static int efx_net_stop(struct net_device *net_dev) | |
1920 | { | |
767e468c | 1921 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 | 1922 | |
62776d03 BH |
1923 | netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", |
1924 | raw_smp_processor_id()); | |
8ceee660 | 1925 | |
8b7325b4 BH |
1926 | /* Stop the device and flush all the channels */ |
1927 | efx_stop_all(efx); | |
8ceee660 BH |
1928 | |
1929 | return 0; | |
1930 | } | |
1931 | ||
5b9e207c | 1932 | /* Context: process, dev_base_lock or RTNL held, non-blocking. */ |
2aa9ef11 BH |
1933 | static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev, |
1934 | struct rtnl_link_stats64 *stats) | |
8ceee660 | 1935 | { |
767e468c | 1936 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 | 1937 | struct efx_mac_stats *mac_stats = &efx->mac_stats; |
8ceee660 | 1938 | |
55edc6e6 | 1939 | spin_lock_bh(&efx->stats_lock); |
1cb34522 | 1940 | |
ef2b90ee | 1941 | efx->type->update_stats(efx); |
8ceee660 BH |
1942 | |
1943 | stats->rx_packets = mac_stats->rx_packets; | |
1944 | stats->tx_packets = mac_stats->tx_packets; | |
1945 | stats->rx_bytes = mac_stats->rx_bytes; | |
1946 | stats->tx_bytes = mac_stats->tx_bytes; | |
80485d34 | 1947 | stats->rx_dropped = efx->n_rx_nodesc_drop_cnt; |
8ceee660 BH |
1948 | stats->multicast = mac_stats->rx_multicast; |
1949 | stats->collisions = mac_stats->tx_collision; | |
1950 | stats->rx_length_errors = (mac_stats->rx_gtjumbo + | |
1951 | mac_stats->rx_length_error); | |
8ceee660 BH |
1952 | stats->rx_crc_errors = mac_stats->rx_bad; |
1953 | stats->rx_frame_errors = mac_stats->rx_align_error; | |
1954 | stats->rx_fifo_errors = mac_stats->rx_overflow; | |
1955 | stats->rx_missed_errors = mac_stats->rx_missed; | |
1956 | stats->tx_window_errors = mac_stats->tx_late_collision; | |
1957 | ||
1958 | stats->rx_errors = (stats->rx_length_errors + | |
8ceee660 BH |
1959 | stats->rx_crc_errors + |
1960 | stats->rx_frame_errors + | |
8ceee660 BH |
1961 | mac_stats->rx_symbol_error); |
1962 | stats->tx_errors = (stats->tx_window_errors + | |
1963 | mac_stats->tx_bad); | |
1964 | ||
1cb34522 BH |
1965 | spin_unlock_bh(&efx->stats_lock); |
1966 | ||
8ceee660 BH |
1967 | return stats; |
1968 | } | |
1969 | ||
1970 | /* Context: netif_tx_lock held, BHs disabled. */ | |
1971 | static void efx_watchdog(struct net_device *net_dev) | |
1972 | { | |
767e468c | 1973 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 | 1974 | |
62776d03 BH |
1975 | netif_err(efx, tx_err, efx->net_dev, |
1976 | "TX stuck with port_enabled=%d: resetting channels\n", | |
1977 | efx->port_enabled); | |
8ceee660 | 1978 | |
739bb23d | 1979 | efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); |
8ceee660 BH |
1980 | } |
1981 | ||
1982 | ||
1983 | /* Context: process, rtnl_lock() held. */ | |
1984 | static int efx_change_mtu(struct net_device *net_dev, int new_mtu) | |
1985 | { | |
767e468c | 1986 | struct efx_nic *efx = netdev_priv(net_dev); |
8b7325b4 | 1987 | int rc; |
8ceee660 | 1988 | |
8b7325b4 BH |
1989 | rc = efx_check_disabled(efx); |
1990 | if (rc) | |
1991 | return rc; | |
8ceee660 BH |
1992 | if (new_mtu > EFX_MAX_MTU) |
1993 | return -EINVAL; | |
1994 | ||
62776d03 | 1995 | netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); |
8ceee660 | 1996 | |
29c69a48 BH |
1997 | efx_device_detach_sync(efx); |
1998 | efx_stop_all(efx); | |
1999 | ||
d3245b28 | 2000 | mutex_lock(&efx->mac_lock); |
8ceee660 | 2001 | net_dev->mtu = new_mtu; |
710b208d | 2002 | efx->type->reconfigure_mac(efx); |
d3245b28 BH |
2003 | mutex_unlock(&efx->mac_lock); |
2004 | ||
8ceee660 | 2005 | efx_start_all(efx); |
29c69a48 | 2006 | netif_device_attach(efx->net_dev); |
6c8eef4a | 2007 | return 0; |
8ceee660 BH |
2008 | } |
2009 | ||
2010 | static int efx_set_mac_address(struct net_device *net_dev, void *data) | |
2011 | { | |
767e468c | 2012 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
2013 | struct sockaddr *addr = data; |
2014 | char *new_addr = addr->sa_data; | |
2015 | ||
8ceee660 | 2016 | if (!is_valid_ether_addr(new_addr)) { |
62776d03 BH |
2017 | netif_err(efx, drv, efx->net_dev, |
2018 | "invalid ethernet MAC address requested: %pM\n", | |
2019 | new_addr); | |
504f9b5a | 2020 | return -EADDRNOTAVAIL; |
8ceee660 BH |
2021 | } |
2022 | ||
2023 | memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len); | |
cd2d5b52 | 2024 | efx_sriov_mac_address_changed(efx); |
8ceee660 BH |
2025 | |
2026 | /* Reconfigure the MAC */ | |
d3245b28 | 2027 | mutex_lock(&efx->mac_lock); |
710b208d | 2028 | efx->type->reconfigure_mac(efx); |
d3245b28 | 2029 | mutex_unlock(&efx->mac_lock); |
8ceee660 BH |
2030 | |
2031 | return 0; | |
2032 | } | |
2033 | ||
a816f75a | 2034 | /* Context: netif_addr_lock held, BHs disabled. */ |
0fca8c97 | 2035 | static void efx_set_rx_mode(struct net_device *net_dev) |
8ceee660 | 2036 | { |
767e468c | 2037 | struct efx_nic *efx = netdev_priv(net_dev); |
22bedad3 | 2038 | struct netdev_hw_addr *ha; |
8ceee660 | 2039 | union efx_multicast_hash *mc_hash = &efx->multicast_hash; |
8ceee660 BH |
2040 | u32 crc; |
2041 | int bit; | |
8ceee660 | 2042 | |
8be4f3e6 | 2043 | efx->promiscuous = !!(net_dev->flags & IFF_PROMISC); |
8ceee660 BH |
2044 | |
2045 | /* Build multicast hash table */ | |
8be4f3e6 | 2046 | if (efx->promiscuous || (net_dev->flags & IFF_ALLMULTI)) { |
8ceee660 BH |
2047 | memset(mc_hash, 0xff, sizeof(*mc_hash)); |
2048 | } else { | |
2049 | memset(mc_hash, 0x00, sizeof(*mc_hash)); | |
22bedad3 JP |
2050 | netdev_for_each_mc_addr(ha, net_dev) { |
2051 | crc = ether_crc_le(ETH_ALEN, ha->addr); | |
8ceee660 | 2052 | bit = crc & (EFX_MCAST_HASH_ENTRIES - 1); |
32766ec8 | 2053 | __set_bit_le(bit, mc_hash); |
8ceee660 | 2054 | } |
8ceee660 | 2055 | |
8be4f3e6 BH |
2056 | /* Broadcast packets go through the multicast hash filter. |
2057 | * ether_crc_le() of the broadcast address is 0xbe2612ff | |
2058 | * so we always add bit 0xff to the mask. | |
2059 | */ | |
32766ec8 | 2060 | __set_bit_le(0xff, mc_hash); |
8be4f3e6 | 2061 | } |
a816f75a | 2062 | |
8be4f3e6 BH |
2063 | if (efx->port_enabled) |
2064 | queue_work(efx->workqueue, &efx->mac_work); | |
2065 | /* Otherwise efx_start_port() will do this */ | |
8ceee660 BH |
2066 | } |
2067 | ||
c8f44aff | 2068 | static int efx_set_features(struct net_device *net_dev, netdev_features_t data) |
abfe9039 BH |
2069 | { |
2070 | struct efx_nic *efx = netdev_priv(net_dev); | |
2071 | ||
2072 | /* If disabling RX n-tuple filtering, clear existing filters */ | |
2073 | if (net_dev->features & ~data & NETIF_F_NTUPLE) | |
2074 | efx_filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); | |
2075 | ||
2076 | return 0; | |
2077 | } | |
2078 | ||
c3ecb9f3 SH |
2079 | static const struct net_device_ops efx_netdev_ops = { |
2080 | .ndo_open = efx_net_open, | |
2081 | .ndo_stop = efx_net_stop, | |
4472702e | 2082 | .ndo_get_stats64 = efx_net_stats, |
c3ecb9f3 SH |
2083 | .ndo_tx_timeout = efx_watchdog, |
2084 | .ndo_start_xmit = efx_hard_start_xmit, | |
2085 | .ndo_validate_addr = eth_validate_addr, | |
2086 | .ndo_do_ioctl = efx_ioctl, | |
2087 | .ndo_change_mtu = efx_change_mtu, | |
2088 | .ndo_set_mac_address = efx_set_mac_address, | |
0fca8c97 | 2089 | .ndo_set_rx_mode = efx_set_rx_mode, |
abfe9039 | 2090 | .ndo_set_features = efx_set_features, |
cd2d5b52 BH |
2091 | #ifdef CONFIG_SFC_SRIOV |
2092 | .ndo_set_vf_mac = efx_sriov_set_vf_mac, | |
2093 | .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, | |
2094 | .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, | |
2095 | .ndo_get_vf_config = efx_sriov_get_vf_config, | |
2096 | #endif | |
c3ecb9f3 SH |
2097 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2098 | .ndo_poll_controller = efx_netpoll, | |
2099 | #endif | |
94b274bf | 2100 | .ndo_setup_tc = efx_setup_tc, |
64d8ad6d BH |
2101 | #ifdef CONFIG_RFS_ACCEL |
2102 | .ndo_rx_flow_steer = efx_filter_rfs, | |
2103 | #endif | |
c3ecb9f3 SH |
2104 | }; |
2105 | ||
7dde596e BH |
2106 | static void efx_update_name(struct efx_nic *efx) |
2107 | { | |
2108 | strcpy(efx->name, efx->net_dev->name); | |
2109 | efx_mtd_rename(efx); | |
2110 | efx_set_channel_names(efx); | |
2111 | } | |
2112 | ||
8ceee660 BH |
2113 | static int efx_netdev_event(struct notifier_block *this, |
2114 | unsigned long event, void *ptr) | |
2115 | { | |
d3208b5e | 2116 | struct net_device *net_dev = ptr; |
8ceee660 | 2117 | |
7dde596e BH |
2118 | if (net_dev->netdev_ops == &efx_netdev_ops && |
2119 | event == NETDEV_CHANGENAME) | |
2120 | efx_update_name(netdev_priv(net_dev)); | |
8ceee660 BH |
2121 | |
2122 | return NOTIFY_DONE; | |
2123 | } | |
2124 | ||
2125 | static struct notifier_block efx_netdev_notifier = { | |
2126 | .notifier_call = efx_netdev_event, | |
2127 | }; | |
2128 | ||
06d5e193 BH |
2129 | static ssize_t |
2130 | show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) | |
2131 | { | |
2132 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
2133 | return sprintf(buf, "%d\n", efx->phy_type); | |
2134 | } | |
2135 | static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL); | |
2136 | ||
8ceee660 BH |
2137 | static int efx_register_netdev(struct efx_nic *efx) |
2138 | { | |
2139 | struct net_device *net_dev = efx->net_dev; | |
c04bfc6b | 2140 | struct efx_channel *channel; |
8ceee660 BH |
2141 | int rc; |
2142 | ||
2143 | net_dev->watchdog_timeo = 5 * HZ; | |
2144 | net_dev->irq = efx->pci_dev->irq; | |
c3ecb9f3 | 2145 | net_dev->netdev_ops = &efx_netdev_ops; |
8ceee660 | 2146 | SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops); |
7e6d06f0 | 2147 | net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; |
8ceee660 | 2148 | |
7dde596e | 2149 | rtnl_lock(); |
aed0628d | 2150 | |
7153f623 BH |
2151 | /* Enable resets to be scheduled and check whether any were |
2152 | * already requested. If so, the NIC is probably hosed so we | |
2153 | * abort. | |
2154 | */ | |
2155 | efx->state = STATE_READY; | |
2156 | smp_mb(); /* ensure we change state before checking reset_pending */ | |
2157 | if (efx->reset_pending) { | |
2158 | netif_err(efx, probe, efx->net_dev, | |
2159 | "aborting probe due to scheduled reset\n"); | |
2160 | rc = -EIO; | |
2161 | goto fail_locked; | |
2162 | } | |
2163 | ||
aed0628d BH |
2164 | rc = dev_alloc_name(net_dev, net_dev->name); |
2165 | if (rc < 0) | |
2166 | goto fail_locked; | |
7dde596e | 2167 | efx_update_name(efx); |
aed0628d | 2168 | |
8f8b3d51 BH |
2169 | /* Always start with carrier off; PHY events will detect the link */ |
2170 | netif_carrier_off(net_dev); | |
2171 | ||
aed0628d BH |
2172 | rc = register_netdevice(net_dev); |
2173 | if (rc) | |
2174 | goto fail_locked; | |
2175 | ||
c04bfc6b BH |
2176 | efx_for_each_channel(channel, efx) { |
2177 | struct efx_tx_queue *tx_queue; | |
60031fcc BH |
2178 | efx_for_each_channel_tx_queue(tx_queue, channel) |
2179 | efx_init_tx_queue_core_txq(tx_queue); | |
c04bfc6b BH |
2180 | } |
2181 | ||
7dde596e | 2182 | rtnl_unlock(); |
8ceee660 | 2183 | |
06d5e193 BH |
2184 | rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); |
2185 | if (rc) { | |
62776d03 BH |
2186 | netif_err(efx, drv, efx->net_dev, |
2187 | "failed to init net dev attributes\n"); | |
06d5e193 BH |
2188 | goto fail_registered; |
2189 | } | |
2190 | ||
8ceee660 | 2191 | return 0; |
06d5e193 | 2192 | |
7153f623 BH |
2193 | fail_registered: |
2194 | rtnl_lock(); | |
2195 | unregister_netdevice(net_dev); | |
aed0628d | 2196 | fail_locked: |
7153f623 | 2197 | efx->state = STATE_UNINIT; |
aed0628d | 2198 | rtnl_unlock(); |
62776d03 | 2199 | netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); |
aed0628d | 2200 | return rc; |
8ceee660 BH |
2201 | } |
2202 | ||
2203 | static void efx_unregister_netdev(struct efx_nic *efx) | |
2204 | { | |
f7d12cdc | 2205 | struct efx_channel *channel; |
8ceee660 BH |
2206 | struct efx_tx_queue *tx_queue; |
2207 | ||
2208 | if (!efx->net_dev) | |
2209 | return; | |
2210 | ||
767e468c | 2211 | BUG_ON(netdev_priv(efx->net_dev) != efx); |
8ceee660 BH |
2212 | |
2213 | /* Free up any skbs still remaining. This has to happen before | |
2214 | * we try to unregister the netdev as running their destructors | |
2215 | * may be needed to get the device ref. count to 0. */ | |
f7d12cdc BH |
2216 | efx_for_each_channel(channel, efx) { |
2217 | efx_for_each_channel_tx_queue(tx_queue, channel) | |
2218 | efx_release_tx_buffers(tx_queue); | |
2219 | } | |
8ceee660 | 2220 | |
73ba7b68 BH |
2221 | strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); |
2222 | device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); | |
7153f623 BH |
2223 | |
2224 | rtnl_lock(); | |
2225 | unregister_netdevice(efx->net_dev); | |
2226 | efx->state = STATE_UNINIT; | |
2227 | rtnl_unlock(); | |
8ceee660 BH |
2228 | } |
2229 | ||
2230 | /************************************************************************** | |
2231 | * | |
2232 | * Device reset and suspend | |
2233 | * | |
2234 | **************************************************************************/ | |
2235 | ||
2467ca46 BH |
2236 | /* Tears down the entire software state and most of the hardware state |
2237 | * before reset. */ | |
d3245b28 | 2238 | void efx_reset_down(struct efx_nic *efx, enum reset_type method) |
8ceee660 | 2239 | { |
8ceee660 BH |
2240 | EFX_ASSERT_RESET_SERIALISED(efx); |
2241 | ||
2467ca46 | 2242 | efx_stop_all(efx); |
7f967c01 | 2243 | efx_stop_interrupts(efx, false); |
5642ceef BH |
2244 | |
2245 | mutex_lock(&efx->mac_lock); | |
4b988280 SH |
2246 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) |
2247 | efx->phy_op->fini(efx); | |
ef2b90ee | 2248 | efx->type->fini(efx); |
8ceee660 BH |
2249 | } |
2250 | ||
2467ca46 BH |
2251 | /* This function will always ensure that the locks acquired in |
2252 | * efx_reset_down() are released. A failure return code indicates | |
2253 | * that we were unable to reinitialise the hardware, and the | |
2254 | * driver should be disabled. If ok is false, then the rx and tx | |
2255 | * engines are not restarted, pending a RESET_DISABLE. */ | |
d3245b28 | 2256 | int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) |
8ceee660 BH |
2257 | { |
2258 | int rc; | |
2259 | ||
2467ca46 | 2260 | EFX_ASSERT_RESET_SERIALISED(efx); |
8ceee660 | 2261 | |
ef2b90ee | 2262 | rc = efx->type->init(efx); |
8ceee660 | 2263 | if (rc) { |
62776d03 | 2264 | netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); |
eb9f6744 | 2265 | goto fail; |
8ceee660 BH |
2266 | } |
2267 | ||
eb9f6744 BH |
2268 | if (!ok) |
2269 | goto fail; | |
2270 | ||
4b988280 | 2271 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { |
eb9f6744 BH |
2272 | rc = efx->phy_op->init(efx); |
2273 | if (rc) | |
2274 | goto fail; | |
2275 | if (efx->phy_op->reconfigure(efx)) | |
62776d03 BH |
2276 | netif_err(efx, drv, efx->net_dev, |
2277 | "could not restore PHY settings\n"); | |
4b988280 SH |
2278 | } |
2279 | ||
710b208d | 2280 | efx->type->reconfigure_mac(efx); |
8ceee660 | 2281 | |
7f967c01 | 2282 | efx_start_interrupts(efx, false); |
64eebcfd | 2283 | efx_restore_filters(efx); |
cd2d5b52 | 2284 | efx_sriov_reset(efx); |
eb9f6744 | 2285 | |
eb9f6744 BH |
2286 | mutex_unlock(&efx->mac_lock); |
2287 | ||
2288 | efx_start_all(efx); | |
2289 | ||
2290 | return 0; | |
2291 | ||
2292 | fail: | |
2293 | efx->port_initialized = false; | |
2467ca46 BH |
2294 | |
2295 | mutex_unlock(&efx->mac_lock); | |
2296 | ||
8ceee660 BH |
2297 | return rc; |
2298 | } | |
2299 | ||
eb9f6744 BH |
2300 | /* Reset the NIC using the specified method. Note that the reset may |
2301 | * fail, in which case the card will be left in an unusable state. | |
8ceee660 | 2302 | * |
eb9f6744 | 2303 | * Caller must hold the rtnl_lock. |
8ceee660 | 2304 | */ |
eb9f6744 | 2305 | int efx_reset(struct efx_nic *efx, enum reset_type method) |
8ceee660 | 2306 | { |
eb9f6744 BH |
2307 | int rc, rc2; |
2308 | bool disabled; | |
8ceee660 | 2309 | |
62776d03 BH |
2310 | netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", |
2311 | RESET_TYPE(method)); | |
8ceee660 | 2312 | |
c2f3b8e3 | 2313 | efx_device_detach_sync(efx); |
d3245b28 | 2314 | efx_reset_down(efx, method); |
8ceee660 | 2315 | |
ef2b90ee | 2316 | rc = efx->type->reset(efx, method); |
8ceee660 | 2317 | if (rc) { |
62776d03 | 2318 | netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); |
eb9f6744 | 2319 | goto out; |
8ceee660 BH |
2320 | } |
2321 | ||
a7d529ae BH |
2322 | /* Clear flags for the scopes we covered. We assume the NIC and |
2323 | * driver are now quiescent so that there is no race here. | |
2324 | */ | |
2325 | efx->reset_pending &= -(1 << (method + 1)); | |
8ceee660 BH |
2326 | |
2327 | /* Reinitialise bus-mastering, which may have been turned off before | |
2328 | * the reset was scheduled. This is still appropriate, even in the | |
2329 | * RESET_TYPE_DISABLE since this driver generally assumes the hardware | |
2330 | * can respond to requests. */ | |
2331 | pci_set_master(efx->pci_dev); | |
2332 | ||
eb9f6744 | 2333 | out: |
8ceee660 | 2334 | /* Leave device stopped if necessary */ |
626950db AR |
2335 | disabled = rc || |
2336 | method == RESET_TYPE_DISABLE || | |
2337 | method == RESET_TYPE_RECOVER_OR_DISABLE; | |
eb9f6744 BH |
2338 | rc2 = efx_reset_up(efx, method, !disabled); |
2339 | if (rc2) { | |
2340 | disabled = true; | |
2341 | if (!rc) | |
2342 | rc = rc2; | |
8ceee660 BH |
2343 | } |
2344 | ||
eb9f6744 | 2345 | if (disabled) { |
f49a4589 | 2346 | dev_close(efx->net_dev); |
62776d03 | 2347 | netif_err(efx, drv, efx->net_dev, "has been disabled\n"); |
f4bd954e | 2348 | efx->state = STATE_DISABLED; |
f4bd954e | 2349 | } else { |
62776d03 | 2350 | netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); |
e4abce85 | 2351 | netif_device_attach(efx->net_dev); |
f4bd954e | 2352 | } |
8ceee660 BH |
2353 | return rc; |
2354 | } | |
2355 | ||
626950db AR |
2356 | /* Try recovery mechanisms. |
2357 | * For now only EEH is supported. | |
2358 | * Returns 0 if the recovery mechanisms are unsuccessful. | |
2359 | * Returns a non-zero value otherwise. | |
2360 | */ | |
2361 | static int efx_try_recovery(struct efx_nic *efx) | |
2362 | { | |
2363 | #ifdef CONFIG_EEH | |
2364 | /* A PCI error can occur and not be seen by EEH because nothing | |
2365 | * happens on the PCI bus. In this case the driver may fail and | |
2366 | * schedule a 'recover or reset', leading to this recovery handler. | |
2367 | * Manually call the eeh failure check function. | |
2368 | */ | |
2369 | struct eeh_dev *eehdev = | |
2370 | of_node_to_eeh_dev(pci_device_to_OF_node(efx->pci_dev)); | |
2371 | ||
2372 | if (eeh_dev_check_failure(eehdev)) { | |
2373 | /* The EEH mechanisms will handle the error and reset the | |
2374 | * device if necessary. | |
2375 | */ | |
2376 | return 1; | |
2377 | } | |
2378 | #endif | |
2379 | return 0; | |
2380 | } | |
2381 | ||
8ceee660 BH |
2382 | /* The worker thread exists so that code that cannot sleep can |
2383 | * schedule a reset for later. | |
2384 | */ | |
2385 | static void efx_reset_work(struct work_struct *data) | |
2386 | { | |
eb9f6744 | 2387 | struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); |
626950db AR |
2388 | unsigned long pending; |
2389 | enum reset_type method; | |
2390 | ||
2391 | pending = ACCESS_ONCE(efx->reset_pending); | |
2392 | method = fls(pending) - 1; | |
2393 | ||
2394 | if ((method == RESET_TYPE_RECOVER_OR_DISABLE || | |
2395 | method == RESET_TYPE_RECOVER_OR_ALL) && | |
2396 | efx_try_recovery(efx)) | |
2397 | return; | |
8ceee660 | 2398 | |
a7d529ae | 2399 | if (!pending) |
319ba649 SH |
2400 | return; |
2401 | ||
eb9f6744 | 2402 | rtnl_lock(); |
7153f623 BH |
2403 | |
2404 | /* We checked the state in efx_schedule_reset() but it may | |
2405 | * have changed by now. Now that we have the RTNL lock, | |
2406 | * it cannot change again. | |
2407 | */ | |
2408 | if (efx->state == STATE_READY) | |
626950db | 2409 | (void)efx_reset(efx, method); |
7153f623 | 2410 | |
eb9f6744 | 2411 | rtnl_unlock(); |
8ceee660 BH |
2412 | } |
2413 | ||
2414 | void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) | |
2415 | { | |
2416 | enum reset_type method; | |
2417 | ||
626950db AR |
2418 | if (efx->state == STATE_RECOVERY) { |
2419 | netif_dbg(efx, drv, efx->net_dev, | |
2420 | "recovering: skip scheduling %s reset\n", | |
2421 | RESET_TYPE(type)); | |
2422 | return; | |
2423 | } | |
2424 | ||
8ceee660 BH |
2425 | switch (type) { |
2426 | case RESET_TYPE_INVISIBLE: | |
2427 | case RESET_TYPE_ALL: | |
626950db | 2428 | case RESET_TYPE_RECOVER_OR_ALL: |
8ceee660 BH |
2429 | case RESET_TYPE_WORLD: |
2430 | case RESET_TYPE_DISABLE: | |
626950db | 2431 | case RESET_TYPE_RECOVER_OR_DISABLE: |
8ceee660 | 2432 | method = type; |
0e2a9c7c BH |
2433 | netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", |
2434 | RESET_TYPE(method)); | |
8ceee660 | 2435 | break; |
8ceee660 | 2436 | default: |
0e2a9c7c | 2437 | method = efx->type->map_reset_reason(type); |
62776d03 BH |
2438 | netif_dbg(efx, drv, efx->net_dev, |
2439 | "scheduling %s reset for %s\n", | |
2440 | RESET_TYPE(method), RESET_TYPE(type)); | |
0e2a9c7c BH |
2441 | break; |
2442 | } | |
8ceee660 | 2443 | |
a7d529ae | 2444 | set_bit(method, &efx->reset_pending); |
7153f623 BH |
2445 | smp_mb(); /* ensure we change reset_pending before checking state */ |
2446 | ||
2447 | /* If we're not READY then just leave the flags set as the cue | |
2448 | * to abort probing or reschedule the reset later. | |
2449 | */ | |
2450 | if (ACCESS_ONCE(efx->state) != STATE_READY) | |
2451 | return; | |
8ceee660 | 2452 | |
8880f4ec BH |
2453 | /* efx_process_channel() will no longer read events once a |
2454 | * reset is scheduled. So switch back to poll'd MCDI completions. */ | |
2455 | efx_mcdi_mode_poll(efx); | |
2456 | ||
1ab00629 | 2457 | queue_work(reset_workqueue, &efx->reset_work); |
8ceee660 BH |
2458 | } |
2459 | ||
2460 | /************************************************************************** | |
2461 | * | |
2462 | * List of NICs we support | |
2463 | * | |
2464 | **************************************************************************/ | |
2465 | ||
2466 | /* PCI device ID table */ | |
a3aa1884 | 2467 | static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = { |
937383a5 BH |
2468 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, |
2469 | PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0), | |
daeda630 | 2470 | .driver_data = (unsigned long) &falcon_a1_nic_type}, |
937383a5 BH |
2471 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, |
2472 | PCI_DEVICE_ID_SOLARFLARE_SFC4000B), | |
daeda630 | 2473 | .driver_data = (unsigned long) &falcon_b0_nic_type}, |
547c474f | 2474 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ |
8880f4ec | 2475 | .driver_data = (unsigned long) &siena_a0_nic_type}, |
547c474f | 2476 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ |
8880f4ec | 2477 | .driver_data = (unsigned long) &siena_a0_nic_type}, |
8ceee660 BH |
2478 | {0} /* end of list */ |
2479 | }; | |
2480 | ||
2481 | /************************************************************************** | |
2482 | * | |
3759433d | 2483 | * Dummy PHY/MAC operations |
8ceee660 | 2484 | * |
01aad7b6 | 2485 | * Can be used for some unimplemented operations |
8ceee660 BH |
2486 | * Needed so all function pointers are valid and do not have to be tested |
2487 | * before use | |
2488 | * | |
2489 | **************************************************************************/ | |
2490 | int efx_port_dummy_op_int(struct efx_nic *efx) | |
2491 | { | |
2492 | return 0; | |
2493 | } | |
2494 | void efx_port_dummy_op_void(struct efx_nic *efx) {} | |
d215697f | 2495 | |
2496 | static bool efx_port_dummy_op_poll(struct efx_nic *efx) | |
fdaa9aed SH |
2497 | { |
2498 | return false; | |
2499 | } | |
8ceee660 | 2500 | |
6c8c2513 | 2501 | static const struct efx_phy_operations efx_dummy_phy_operations = { |
8ceee660 | 2502 | .init = efx_port_dummy_op_int, |
d3245b28 | 2503 | .reconfigure = efx_port_dummy_op_int, |
fdaa9aed | 2504 | .poll = efx_port_dummy_op_poll, |
8ceee660 | 2505 | .fini = efx_port_dummy_op_void, |
8ceee660 BH |
2506 | }; |
2507 | ||
8ceee660 BH |
2508 | /************************************************************************** |
2509 | * | |
2510 | * Data housekeeping | |
2511 | * | |
2512 | **************************************************************************/ | |
2513 | ||
2514 | /* This zeroes out and then fills in the invariants in a struct | |
2515 | * efx_nic (including all sub-structures). | |
2516 | */ | |
adeb15aa | 2517 | static int efx_init_struct(struct efx_nic *efx, |
8ceee660 BH |
2518 | struct pci_dev *pci_dev, struct net_device *net_dev) |
2519 | { | |
4642610c | 2520 | int i; |
8ceee660 BH |
2521 | |
2522 | /* Initialise common structures */ | |
8ceee660 | 2523 | spin_lock_init(&efx->biu_lock); |
76884835 BH |
2524 | #ifdef CONFIG_SFC_MTD |
2525 | INIT_LIST_HEAD(&efx->mtd_list); | |
2526 | #endif | |
8ceee660 BH |
2527 | INIT_WORK(&efx->reset_work, efx_reset_work); |
2528 | INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); | |
dd40781e | 2529 | INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); |
8ceee660 | 2530 | efx->pci_dev = pci_dev; |
62776d03 | 2531 | efx->msg_enable = debug; |
f16aeea0 | 2532 | efx->state = STATE_UNINIT; |
8ceee660 | 2533 | strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); |
8ceee660 BH |
2534 | |
2535 | efx->net_dev = net_dev; | |
8ceee660 BH |
2536 | spin_lock_init(&efx->stats_lock); |
2537 | mutex_init(&efx->mac_lock); | |
2538 | efx->phy_op = &efx_dummy_phy_operations; | |
68e7f45e | 2539 | efx->mdio.dev = net_dev; |
766ca0fa | 2540 | INIT_WORK(&efx->mac_work, efx_mac_work); |
9f2cb71c | 2541 | init_waitqueue_head(&efx->flush_wq); |
8ceee660 BH |
2542 | |
2543 | for (i = 0; i < EFX_MAX_CHANNELS; i++) { | |
4642610c BH |
2544 | efx->channel[i] = efx_alloc_channel(efx, i, NULL); |
2545 | if (!efx->channel[i]) | |
2546 | goto fail; | |
8ceee660 BH |
2547 | } |
2548 | ||
8ceee660 BH |
2549 | EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS); |
2550 | ||
2551 | /* Higher numbered interrupt modes are less capable! */ | |
2552 | efx->interrupt_mode = max(efx->type->max_interrupt_mode, | |
2553 | interrupt_mode); | |
2554 | ||
6977dc63 BH |
2555 | /* Would be good to use the net_dev name, but we're too early */ |
2556 | snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", | |
2557 | pci_name(pci_dev)); | |
2558 | efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); | |
1ab00629 | 2559 | if (!efx->workqueue) |
4642610c | 2560 | goto fail; |
8d9853d9 | 2561 | |
8ceee660 | 2562 | return 0; |
4642610c BH |
2563 | |
2564 | fail: | |
2565 | efx_fini_struct(efx); | |
2566 | return -ENOMEM; | |
8ceee660 BH |
2567 | } |
2568 | ||
2569 | static void efx_fini_struct(struct efx_nic *efx) | |
2570 | { | |
8313aca3 BH |
2571 | int i; |
2572 | ||
2573 | for (i = 0; i < EFX_MAX_CHANNELS; i++) | |
2574 | kfree(efx->channel[i]); | |
2575 | ||
8ceee660 BH |
2576 | if (efx->workqueue) { |
2577 | destroy_workqueue(efx->workqueue); | |
2578 | efx->workqueue = NULL; | |
2579 | } | |
2580 | } | |
2581 | ||
2582 | /************************************************************************** | |
2583 | * | |
2584 | * PCI interface | |
2585 | * | |
2586 | **************************************************************************/ | |
2587 | ||
2588 | /* Main body of final NIC shutdown code | |
2589 | * This is called only at module unload (or hotplug removal). | |
2590 | */ | |
2591 | static void efx_pci_remove_main(struct efx_nic *efx) | |
2592 | { | |
7153f623 BH |
2593 | /* Flush reset_work. It can no longer be scheduled since we |
2594 | * are not READY. | |
2595 | */ | |
2596 | BUG_ON(efx->state == STATE_READY); | |
2597 | cancel_work_sync(&efx->reset_work); | |
2598 | ||
64d8ad6d BH |
2599 | #ifdef CONFIG_RFS_ACCEL |
2600 | free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap); | |
2601 | efx->net_dev->rx_cpu_rmap = NULL; | |
2602 | #endif | |
7f967c01 | 2603 | efx_stop_interrupts(efx, false); |
152b6a62 | 2604 | efx_nic_fini_interrupt(efx); |
8ceee660 | 2605 | efx_fini_port(efx); |
ef2b90ee | 2606 | efx->type->fini(efx); |
8ceee660 BH |
2607 | efx_fini_napi(efx); |
2608 | efx_remove_all(efx); | |
2609 | } | |
2610 | ||
2611 | /* Final NIC shutdown | |
2612 | * This is called only at module unload (or hotplug removal). | |
2613 | */ | |
2614 | static void efx_pci_remove(struct pci_dev *pci_dev) | |
2615 | { | |
2616 | struct efx_nic *efx; | |
2617 | ||
2618 | efx = pci_get_drvdata(pci_dev); | |
2619 | if (!efx) | |
2620 | return; | |
2621 | ||
2622 | /* Mark the NIC as fini, then stop the interface */ | |
2623 | rtnl_lock(); | |
8ceee660 | 2624 | dev_close(efx->net_dev); |
5642ceef | 2625 | efx_stop_interrupts(efx, false); |
8ceee660 BH |
2626 | rtnl_unlock(); |
2627 | ||
cd2d5b52 | 2628 | efx_sriov_fini(efx); |
8ceee660 BH |
2629 | efx_unregister_netdev(efx); |
2630 | ||
7dde596e BH |
2631 | efx_mtd_remove(efx); |
2632 | ||
8ceee660 BH |
2633 | efx_pci_remove_main(efx); |
2634 | ||
8ceee660 | 2635 | efx_fini_io(efx); |
62776d03 | 2636 | netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); |
8ceee660 | 2637 | |
8ceee660 | 2638 | efx_fini_struct(efx); |
3de4e301 | 2639 | pci_set_drvdata(pci_dev, NULL); |
8ceee660 | 2640 | free_netdev(efx->net_dev); |
626950db AR |
2641 | |
2642 | pci_disable_pcie_error_reporting(pci_dev); | |
8ceee660 BH |
2643 | }; |
2644 | ||
460eeaa0 BH |
2645 | /* NIC VPD information |
2646 | * Called during probe to display the part number of the | |
2647 | * installed NIC. VPD is potentially very large but this should | |
2648 | * always appear within the first 512 bytes. | |
2649 | */ | |
2650 | #define SFC_VPD_LEN 512 | |
2651 | static void efx_print_product_vpd(struct efx_nic *efx) | |
2652 | { | |
2653 | struct pci_dev *dev = efx->pci_dev; | |
2654 | char vpd_data[SFC_VPD_LEN]; | |
2655 | ssize_t vpd_size; | |
2656 | int i, j; | |
2657 | ||
2658 | /* Get the vpd data from the device */ | |
2659 | vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); | |
2660 | if (vpd_size <= 0) { | |
2661 | netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); | |
2662 | return; | |
2663 | } | |
2664 | ||
2665 | /* Get the Read only section */ | |
2666 | i = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); | |
2667 | if (i < 0) { | |
2668 | netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); | |
2669 | return; | |
2670 | } | |
2671 | ||
2672 | j = pci_vpd_lrdt_size(&vpd_data[i]); | |
2673 | i += PCI_VPD_LRDT_TAG_SIZE; | |
2674 | if (i + j > vpd_size) | |
2675 | j = vpd_size - i; | |
2676 | ||
2677 | /* Get the Part number */ | |
2678 | i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); | |
2679 | if (i < 0) { | |
2680 | netif_err(efx, drv, efx->net_dev, "Part number not found\n"); | |
2681 | return; | |
2682 | } | |
2683 | ||
2684 | j = pci_vpd_info_field_size(&vpd_data[i]); | |
2685 | i += PCI_VPD_INFO_FLD_HDR_SIZE; | |
2686 | if (i + j > vpd_size) { | |
2687 | netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); | |
2688 | return; | |
2689 | } | |
2690 | ||
2691 | netif_info(efx, drv, efx->net_dev, | |
2692 | "Part Number : %.*s\n", j, &vpd_data[i]); | |
2693 | } | |
2694 | ||
2695 | ||
8ceee660 BH |
2696 | /* Main body of NIC initialisation |
2697 | * This is called at module load (or hotplug insertion, theoretically). | |
2698 | */ | |
2699 | static int efx_pci_probe_main(struct efx_nic *efx) | |
2700 | { | |
2701 | int rc; | |
2702 | ||
2703 | /* Do start-of-day initialisation */ | |
2704 | rc = efx_probe_all(efx); | |
2705 | if (rc) | |
2706 | goto fail1; | |
2707 | ||
e8f14992 | 2708 | efx_init_napi(efx); |
8ceee660 | 2709 | |
ef2b90ee | 2710 | rc = efx->type->init(efx); |
8ceee660 | 2711 | if (rc) { |
62776d03 BH |
2712 | netif_err(efx, probe, efx->net_dev, |
2713 | "failed to initialise NIC\n"); | |
278c0621 | 2714 | goto fail3; |
8ceee660 BH |
2715 | } |
2716 | ||
2717 | rc = efx_init_port(efx); | |
2718 | if (rc) { | |
62776d03 BH |
2719 | netif_err(efx, probe, efx->net_dev, |
2720 | "failed to initialise port\n"); | |
278c0621 | 2721 | goto fail4; |
8ceee660 BH |
2722 | } |
2723 | ||
152b6a62 | 2724 | rc = efx_nic_init_interrupt(efx); |
8ceee660 | 2725 | if (rc) |
278c0621 | 2726 | goto fail5; |
7f967c01 | 2727 | efx_start_interrupts(efx, false); |
8ceee660 BH |
2728 | |
2729 | return 0; | |
2730 | ||
278c0621 | 2731 | fail5: |
8ceee660 | 2732 | efx_fini_port(efx); |
8ceee660 | 2733 | fail4: |
ef2b90ee | 2734 | efx->type->fini(efx); |
8ceee660 BH |
2735 | fail3: |
2736 | efx_fini_napi(efx); | |
8ceee660 BH |
2737 | efx_remove_all(efx); |
2738 | fail1: | |
2739 | return rc; | |
2740 | } | |
2741 | ||
2742 | /* NIC initialisation | |
2743 | * | |
2744 | * This is called at module load (or hotplug insertion, | |
73ba7b68 | 2745 | * theoretically). It sets up PCI mappings, resets the NIC, |
8ceee660 BH |
2746 | * sets up and registers the network devices with the kernel and hooks |
2747 | * the interrupt service routine. It does not prepare the device for | |
2748 | * transmission; this is left to the first time one of the network | |
2749 | * interfaces is brought up (i.e. efx_net_open). | |
2750 | */ | |
87d1fc11 | 2751 | static int efx_pci_probe(struct pci_dev *pci_dev, |
1dd06ae8 | 2752 | const struct pci_device_id *entry) |
8ceee660 | 2753 | { |
8ceee660 BH |
2754 | struct net_device *net_dev; |
2755 | struct efx_nic *efx; | |
fadac6aa | 2756 | int rc; |
8ceee660 BH |
2757 | |
2758 | /* Allocate and initialise a struct net_device and struct efx_nic */ | |
94b274bf BH |
2759 | net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, |
2760 | EFX_MAX_RX_QUEUES); | |
8ceee660 BH |
2761 | if (!net_dev) |
2762 | return -ENOMEM; | |
adeb15aa BH |
2763 | efx = netdev_priv(net_dev); |
2764 | efx->type = (const struct efx_nic_type *) entry->driver_data; | |
2765 | net_dev->features |= (efx->type->offload_features | NETIF_F_SG | | |
97bc5415 | 2766 | NETIF_F_HIGHDMA | NETIF_F_TSO | |
abfe9039 | 2767 | NETIF_F_RXCSUM); |
adeb15aa | 2768 | if (efx->type->offload_features & NETIF_F_V6_CSUM) |
738a8f4b | 2769 | net_dev->features |= NETIF_F_TSO6; |
28506563 BH |
2770 | /* Mask for features that also apply to VLAN devices */ |
2771 | net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | | |
abfe9039 BH |
2772 | NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | |
2773 | NETIF_F_RXCSUM); | |
2774 | /* All offloads can be toggled */ | |
2775 | net_dev->hw_features = net_dev->features & ~NETIF_F_HIGHDMA; | |
8ceee660 | 2776 | pci_set_drvdata(pci_dev, efx); |
62776d03 | 2777 | SET_NETDEV_DEV(net_dev, &pci_dev->dev); |
adeb15aa | 2778 | rc = efx_init_struct(efx, pci_dev, net_dev); |
8ceee660 BH |
2779 | if (rc) |
2780 | goto fail1; | |
2781 | ||
62776d03 | 2782 | netif_info(efx, probe, efx->net_dev, |
ff79c8ac | 2783 | "Solarflare NIC detected\n"); |
8ceee660 | 2784 | |
460eeaa0 BH |
2785 | efx_print_product_vpd(efx); |
2786 | ||
8ceee660 BH |
2787 | /* Set up basic I/O (BAR mappings etc) */ |
2788 | rc = efx_init_io(efx); | |
2789 | if (rc) | |
2790 | goto fail2; | |
2791 | ||
fadac6aa | 2792 | rc = efx_pci_probe_main(efx); |
fadac6aa BH |
2793 | if (rc) |
2794 | goto fail3; | |
8ceee660 | 2795 | |
8ceee660 BH |
2796 | rc = efx_register_netdev(efx); |
2797 | if (rc) | |
fadac6aa | 2798 | goto fail4; |
8ceee660 | 2799 | |
cd2d5b52 BH |
2800 | rc = efx_sriov_init(efx); |
2801 | if (rc) | |
2802 | netif_err(efx, probe, efx->net_dev, | |
2803 | "SR-IOV can't be enabled rc %d\n", rc); | |
2804 | ||
62776d03 | 2805 | netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); |
a5211bb5 | 2806 | |
7c43161c | 2807 | /* Try to create MTDs, but allow this to fail */ |
a5211bb5 | 2808 | rtnl_lock(); |
7c43161c | 2809 | rc = efx_mtd_probe(efx); |
a5211bb5 | 2810 | rtnl_unlock(); |
7c43161c BH |
2811 | if (rc) |
2812 | netif_warn(efx, probe, efx->net_dev, | |
2813 | "failed to create MTDs (%d)\n", rc); | |
2814 | ||
626950db AR |
2815 | rc = pci_enable_pcie_error_reporting(pci_dev); |
2816 | if (rc && rc != -EINVAL) | |
2817 | netif_warn(efx, probe, efx->net_dev, | |
2818 | "pci_enable_pcie_error_reporting failed (%d)\n", rc); | |
2819 | ||
8ceee660 BH |
2820 | return 0; |
2821 | ||
8ceee660 | 2822 | fail4: |
fadac6aa | 2823 | efx_pci_remove_main(efx); |
8ceee660 BH |
2824 | fail3: |
2825 | efx_fini_io(efx); | |
2826 | fail2: | |
2827 | efx_fini_struct(efx); | |
2828 | fail1: | |
3de4e301 | 2829 | pci_set_drvdata(pci_dev, NULL); |
5e2a911c | 2830 | WARN_ON(rc > 0); |
62776d03 | 2831 | netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); |
8ceee660 BH |
2832 | free_netdev(net_dev); |
2833 | return rc; | |
2834 | } | |
2835 | ||
89c758fa BH |
2836 | static int efx_pm_freeze(struct device *dev) |
2837 | { | |
2838 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
2839 | ||
61da026d BH |
2840 | rtnl_lock(); |
2841 | ||
6032fb56 BH |
2842 | if (efx->state != STATE_DISABLED) { |
2843 | efx->state = STATE_UNINIT; | |
89c758fa | 2844 | |
c2f3b8e3 | 2845 | efx_device_detach_sync(efx); |
89c758fa | 2846 | |
6032fb56 BH |
2847 | efx_stop_all(efx); |
2848 | efx_stop_interrupts(efx, false); | |
2849 | } | |
89c758fa | 2850 | |
61da026d BH |
2851 | rtnl_unlock(); |
2852 | ||
89c758fa BH |
2853 | return 0; |
2854 | } | |
2855 | ||
2856 | static int efx_pm_thaw(struct device *dev) | |
2857 | { | |
2858 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
2859 | ||
61da026d BH |
2860 | rtnl_lock(); |
2861 | ||
6032fb56 BH |
2862 | if (efx->state != STATE_DISABLED) { |
2863 | efx_start_interrupts(efx, false); | |
89c758fa | 2864 | |
6032fb56 BH |
2865 | mutex_lock(&efx->mac_lock); |
2866 | efx->phy_op->reconfigure(efx); | |
2867 | mutex_unlock(&efx->mac_lock); | |
89c758fa | 2868 | |
6032fb56 | 2869 | efx_start_all(efx); |
89c758fa | 2870 | |
6032fb56 | 2871 | netif_device_attach(efx->net_dev); |
89c758fa | 2872 | |
6032fb56 | 2873 | efx->state = STATE_READY; |
89c758fa | 2874 | |
6032fb56 BH |
2875 | efx->type->resume_wol(efx); |
2876 | } | |
89c758fa | 2877 | |
61da026d BH |
2878 | rtnl_unlock(); |
2879 | ||
319ba649 SH |
2880 | /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ |
2881 | queue_work(reset_workqueue, &efx->reset_work); | |
2882 | ||
89c758fa BH |
2883 | return 0; |
2884 | } | |
2885 | ||
2886 | static int efx_pm_poweroff(struct device *dev) | |
2887 | { | |
2888 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
2889 | struct efx_nic *efx = pci_get_drvdata(pci_dev); | |
2890 | ||
2891 | efx->type->fini(efx); | |
2892 | ||
a7d529ae | 2893 | efx->reset_pending = 0; |
89c758fa BH |
2894 | |
2895 | pci_save_state(pci_dev); | |
2896 | return pci_set_power_state(pci_dev, PCI_D3hot); | |
2897 | } | |
2898 | ||
2899 | /* Used for both resume and restore */ | |
2900 | static int efx_pm_resume(struct device *dev) | |
2901 | { | |
2902 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
2903 | struct efx_nic *efx = pci_get_drvdata(pci_dev); | |
2904 | int rc; | |
2905 | ||
2906 | rc = pci_set_power_state(pci_dev, PCI_D0); | |
2907 | if (rc) | |
2908 | return rc; | |
2909 | pci_restore_state(pci_dev); | |
2910 | rc = pci_enable_device(pci_dev); | |
2911 | if (rc) | |
2912 | return rc; | |
2913 | pci_set_master(efx->pci_dev); | |
2914 | rc = efx->type->reset(efx, RESET_TYPE_ALL); | |
2915 | if (rc) | |
2916 | return rc; | |
2917 | rc = efx->type->init(efx); | |
2918 | if (rc) | |
2919 | return rc; | |
2920 | efx_pm_thaw(dev); | |
2921 | return 0; | |
2922 | } | |
2923 | ||
2924 | static int efx_pm_suspend(struct device *dev) | |
2925 | { | |
2926 | int rc; | |
2927 | ||
2928 | efx_pm_freeze(dev); | |
2929 | rc = efx_pm_poweroff(dev); | |
2930 | if (rc) | |
2931 | efx_pm_resume(dev); | |
2932 | return rc; | |
2933 | } | |
2934 | ||
18e83e4c | 2935 | static const struct dev_pm_ops efx_pm_ops = { |
89c758fa BH |
2936 | .suspend = efx_pm_suspend, |
2937 | .resume = efx_pm_resume, | |
2938 | .freeze = efx_pm_freeze, | |
2939 | .thaw = efx_pm_thaw, | |
2940 | .poweroff = efx_pm_poweroff, | |
2941 | .restore = efx_pm_resume, | |
2942 | }; | |
2943 | ||
626950db AR |
2944 | /* A PCI error affecting this device was detected. |
2945 | * At this point MMIO and DMA may be disabled. | |
2946 | * Stop the software path and request a slot reset. | |
2947 | */ | |
2948 | pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev, | |
2949 | enum pci_channel_state state) | |
2950 | { | |
2951 | pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; | |
2952 | struct efx_nic *efx = pci_get_drvdata(pdev); | |
2953 | ||
2954 | if (state == pci_channel_io_perm_failure) | |
2955 | return PCI_ERS_RESULT_DISCONNECT; | |
2956 | ||
2957 | rtnl_lock(); | |
2958 | ||
2959 | if (efx->state != STATE_DISABLED) { | |
2960 | efx->state = STATE_RECOVERY; | |
2961 | efx->reset_pending = 0; | |
2962 | ||
2963 | efx_device_detach_sync(efx); | |
2964 | ||
2965 | efx_stop_all(efx); | |
2966 | efx_stop_interrupts(efx, false); | |
2967 | ||
2968 | status = PCI_ERS_RESULT_NEED_RESET; | |
2969 | } else { | |
2970 | /* If the interface is disabled we don't want to do anything | |
2971 | * with it. | |
2972 | */ | |
2973 | status = PCI_ERS_RESULT_RECOVERED; | |
2974 | } | |
2975 | ||
2976 | rtnl_unlock(); | |
2977 | ||
2978 | pci_disable_device(pdev); | |
2979 | ||
2980 | return status; | |
2981 | } | |
2982 | ||
2983 | /* Fake a successfull reset, which will be performed later in efx_io_resume. */ | |
2984 | pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev) | |
2985 | { | |
2986 | struct efx_nic *efx = pci_get_drvdata(pdev); | |
2987 | pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; | |
2988 | int rc; | |
2989 | ||
2990 | if (pci_enable_device(pdev)) { | |
2991 | netif_err(efx, hw, efx->net_dev, | |
2992 | "Cannot re-enable PCI device after reset.\n"); | |
2993 | status = PCI_ERS_RESULT_DISCONNECT; | |
2994 | } | |
2995 | ||
2996 | rc = pci_cleanup_aer_uncorrect_error_status(pdev); | |
2997 | if (rc) { | |
2998 | netif_err(efx, hw, efx->net_dev, | |
2999 | "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc); | |
3000 | /* Non-fatal error. Continue. */ | |
3001 | } | |
3002 | ||
3003 | return status; | |
3004 | } | |
3005 | ||
3006 | /* Perform the actual reset and resume I/O operations. */ | |
3007 | static void efx_io_resume(struct pci_dev *pdev) | |
3008 | { | |
3009 | struct efx_nic *efx = pci_get_drvdata(pdev); | |
3010 | int rc; | |
3011 | ||
3012 | rtnl_lock(); | |
3013 | ||
3014 | if (efx->state == STATE_DISABLED) | |
3015 | goto out; | |
3016 | ||
3017 | rc = efx_reset(efx, RESET_TYPE_ALL); | |
3018 | if (rc) { | |
3019 | netif_err(efx, hw, efx->net_dev, | |
3020 | "efx_reset failed after PCI error (%d)\n", rc); | |
3021 | } else { | |
3022 | efx->state = STATE_READY; | |
3023 | netif_dbg(efx, hw, efx->net_dev, | |
3024 | "Done resetting and resuming IO after PCI error.\n"); | |
3025 | } | |
3026 | ||
3027 | out: | |
3028 | rtnl_unlock(); | |
3029 | } | |
3030 | ||
3031 | /* For simplicity and reliability, we always require a slot reset and try to | |
3032 | * reset the hardware when a pci error affecting the device is detected. | |
3033 | * We leave both the link_reset and mmio_enabled callback unimplemented: | |
3034 | * with our request for slot reset the mmio_enabled callback will never be | |
3035 | * called, and the link_reset callback is not used by AER or EEH mechanisms. | |
3036 | */ | |
3037 | static struct pci_error_handlers efx_err_handlers = { | |
3038 | .error_detected = efx_io_error_detected, | |
3039 | .slot_reset = efx_io_slot_reset, | |
3040 | .resume = efx_io_resume, | |
3041 | }; | |
3042 | ||
8ceee660 | 3043 | static struct pci_driver efx_pci_driver = { |
c5d5f5fd | 3044 | .name = KBUILD_MODNAME, |
8ceee660 BH |
3045 | .id_table = efx_pci_table, |
3046 | .probe = efx_pci_probe, | |
3047 | .remove = efx_pci_remove, | |
89c758fa | 3048 | .driver.pm = &efx_pm_ops, |
626950db | 3049 | .err_handler = &efx_err_handlers, |
8ceee660 BH |
3050 | }; |
3051 | ||
3052 | /************************************************************************** | |
3053 | * | |
3054 | * Kernel module interface | |
3055 | * | |
3056 | *************************************************************************/ | |
3057 | ||
3058 | module_param(interrupt_mode, uint, 0444); | |
3059 | MODULE_PARM_DESC(interrupt_mode, | |
3060 | "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); | |
3061 | ||
3062 | static int __init efx_init_module(void) | |
3063 | { | |
3064 | int rc; | |
3065 | ||
3066 | printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); | |
3067 | ||
3068 | rc = register_netdevice_notifier(&efx_netdev_notifier); | |
3069 | if (rc) | |
3070 | goto err_notifier; | |
3071 | ||
cd2d5b52 BH |
3072 | rc = efx_init_sriov(); |
3073 | if (rc) | |
3074 | goto err_sriov; | |
3075 | ||
1ab00629 SH |
3076 | reset_workqueue = create_singlethread_workqueue("sfc_reset"); |
3077 | if (!reset_workqueue) { | |
3078 | rc = -ENOMEM; | |
3079 | goto err_reset; | |
3080 | } | |
8ceee660 BH |
3081 | |
3082 | rc = pci_register_driver(&efx_pci_driver); | |
3083 | if (rc < 0) | |
3084 | goto err_pci; | |
3085 | ||
3086 | return 0; | |
3087 | ||
3088 | err_pci: | |
1ab00629 SH |
3089 | destroy_workqueue(reset_workqueue); |
3090 | err_reset: | |
cd2d5b52 BH |
3091 | efx_fini_sriov(); |
3092 | err_sriov: | |
8ceee660 BH |
3093 | unregister_netdevice_notifier(&efx_netdev_notifier); |
3094 | err_notifier: | |
3095 | return rc; | |
3096 | } | |
3097 | ||
3098 | static void __exit efx_exit_module(void) | |
3099 | { | |
3100 | printk(KERN_INFO "Solarflare NET driver unloading\n"); | |
3101 | ||
3102 | pci_unregister_driver(&efx_pci_driver); | |
1ab00629 | 3103 | destroy_workqueue(reset_workqueue); |
cd2d5b52 | 3104 | efx_fini_sriov(); |
8ceee660 BH |
3105 | unregister_netdevice_notifier(&efx_netdev_notifier); |
3106 | ||
3107 | } | |
3108 | ||
3109 | module_init(efx_init_module); | |
3110 | module_exit(efx_exit_module); | |
3111 | ||
906bb26c BH |
3112 | MODULE_AUTHOR("Solarflare Communications and " |
3113 | "Michael Brown <mbrown@fensystems.co.uk>"); | |
8ceee660 BH |
3114 | MODULE_DESCRIPTION("Solarflare Communications network driver"); |
3115 | MODULE_LICENSE("GPL"); | |
3116 | MODULE_DEVICE_TABLE(pci, efx_pci_table); |