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8ceee660 | 1 | /**************************************************************************** |
f7a6d2c4 | 2 | * Driver for Solarflare network controllers and boards |
8ceee660 | 3 | * Copyright 2005-2006 Fen Systems Ltd. |
f7a6d2c4 | 4 | * Copyright 2005-2013 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> | |
8ceee660 | 20 | #include <linux/ethtool.h> |
aa6ef27e | 21 | #include <linux/topology.h> |
5a0e3ad6 | 22 | #include <linux/gfp.h> |
626950db | 23 | #include <linux/aer.h> |
b28405b0 | 24 | #include <linux/interrupt.h> |
8ceee660 | 25 | #include "net_driver.h" |
8ceee660 | 26 | #include "efx.h" |
744093c9 | 27 | #include "nic.h" |
dd40781e | 28 | #include "selftest.h" |
8ceee660 | 29 | |
8880f4ec | 30 | #include "mcdi.h" |
fd371e32 | 31 | #include "workarounds.h" |
8880f4ec | 32 | |
c459302d BH |
33 | /************************************************************************** |
34 | * | |
35 | * Type name strings | |
36 | * | |
37 | ************************************************************************** | |
38 | */ | |
39 | ||
40 | /* Loopback mode names (see LOOPBACK_MODE()) */ | |
41 | const unsigned int efx_loopback_mode_max = LOOPBACK_MAX; | |
18e83e4c | 42 | const char *const efx_loopback_mode_names[] = { |
c459302d | 43 | [LOOPBACK_NONE] = "NONE", |
e58f69f4 | 44 | [LOOPBACK_DATA] = "DATAPATH", |
c459302d BH |
45 | [LOOPBACK_GMAC] = "GMAC", |
46 | [LOOPBACK_XGMII] = "XGMII", | |
47 | [LOOPBACK_XGXS] = "XGXS", | |
9c636baf BH |
48 | [LOOPBACK_XAUI] = "XAUI", |
49 | [LOOPBACK_GMII] = "GMII", | |
50 | [LOOPBACK_SGMII] = "SGMII", | |
e58f69f4 BH |
51 | [LOOPBACK_XGBR] = "XGBR", |
52 | [LOOPBACK_XFI] = "XFI", | |
53 | [LOOPBACK_XAUI_FAR] = "XAUI_FAR", | |
54 | [LOOPBACK_GMII_FAR] = "GMII_FAR", | |
55 | [LOOPBACK_SGMII_FAR] = "SGMII_FAR", | |
56 | [LOOPBACK_XFI_FAR] = "XFI_FAR", | |
c459302d BH |
57 | [LOOPBACK_GPHY] = "GPHY", |
58 | [LOOPBACK_PHYXS] = "PHYXS", | |
9c636baf BH |
59 | [LOOPBACK_PCS] = "PCS", |
60 | [LOOPBACK_PMAPMD] = "PMA/PMD", | |
e58f69f4 BH |
61 | [LOOPBACK_XPORT] = "XPORT", |
62 | [LOOPBACK_XGMII_WS] = "XGMII_WS", | |
9c636baf | 63 | [LOOPBACK_XAUI_WS] = "XAUI_WS", |
e58f69f4 BH |
64 | [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR", |
65 | [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR", | |
9c636baf | 66 | [LOOPBACK_GMII_WS] = "GMII_WS", |
e58f69f4 BH |
67 | [LOOPBACK_XFI_WS] = "XFI_WS", |
68 | [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR", | |
9c636baf | 69 | [LOOPBACK_PHYXS_WS] = "PHYXS_WS", |
c459302d BH |
70 | }; |
71 | ||
c459302d | 72 | const unsigned int efx_reset_type_max = RESET_TYPE_MAX; |
18e83e4c | 73 | const char *const efx_reset_type_names[] = { |
626950db AR |
74 | [RESET_TYPE_INVISIBLE] = "INVISIBLE", |
75 | [RESET_TYPE_ALL] = "ALL", | |
76 | [RESET_TYPE_RECOVER_OR_ALL] = "RECOVER_OR_ALL", | |
77 | [RESET_TYPE_WORLD] = "WORLD", | |
78 | [RESET_TYPE_RECOVER_OR_DISABLE] = "RECOVER_OR_DISABLE", | |
79 | [RESET_TYPE_DISABLE] = "DISABLE", | |
80 | [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG", | |
81 | [RESET_TYPE_INT_ERROR] = "INT_ERROR", | |
82 | [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY", | |
3de82b91 | 83 | [RESET_TYPE_DMA_ERROR] = "DMA_ERROR", |
626950db AR |
84 | [RESET_TYPE_TX_SKIP] = "TX_SKIP", |
85 | [RESET_TYPE_MC_FAILURE] = "MC_FAILURE", | |
c459302d BH |
86 | }; |
87 | ||
1ab00629 SH |
88 | /* Reset workqueue. If any NIC has a hardware failure then a reset will be |
89 | * queued onto this work queue. This is not a per-nic work queue, because | |
90 | * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. | |
91 | */ | |
92 | static struct workqueue_struct *reset_workqueue; | |
93 | ||
8ceee660 BH |
94 | /************************************************************************** |
95 | * | |
96 | * Configurable values | |
97 | * | |
98 | *************************************************************************/ | |
99 | ||
8ceee660 BH |
100 | /* |
101 | * Use separate channels for TX and RX events | |
102 | * | |
28b581ab NT |
103 | * Set this to 1 to use separate channels for TX and RX. It allows us |
104 | * to control interrupt affinity separately for TX and RX. | |
8ceee660 | 105 | * |
28b581ab | 106 | * This is only used in MSI-X interrupt mode |
8ceee660 | 107 | */ |
b9cc977d BH |
108 | static bool separate_tx_channels; |
109 | module_param(separate_tx_channels, bool, 0444); | |
28b581ab NT |
110 | MODULE_PARM_DESC(separate_tx_channels, |
111 | "Use separate channels for TX and RX"); | |
8ceee660 BH |
112 | |
113 | /* This is the weight assigned to each of the (per-channel) virtual | |
114 | * NAPI devices. | |
115 | */ | |
116 | static int napi_weight = 64; | |
117 | ||
118 | /* This is the time (in jiffies) between invocations of the hardware | |
626950db AR |
119 | * monitor. |
120 | * On Falcon-based NICs, this will: | |
e254c274 BH |
121 | * - Check the on-board hardware monitor; |
122 | * - Poll the link state and reconfigure the hardware as necessary. | |
626950db AR |
123 | * On Siena-based NICs for power systems with EEH support, this will give EEH a |
124 | * chance to start. | |
8ceee660 | 125 | */ |
d215697f | 126 | static unsigned int efx_monitor_interval = 1 * HZ; |
8ceee660 | 127 | |
8ceee660 BH |
128 | /* Initial interrupt moderation settings. They can be modified after |
129 | * module load with ethtool. | |
130 | * | |
131 | * The default for RX should strike a balance between increasing the | |
132 | * round-trip latency and reducing overhead. | |
133 | */ | |
134 | static unsigned int rx_irq_mod_usec = 60; | |
135 | ||
136 | /* Initial interrupt moderation settings. They can be modified after | |
137 | * module load with ethtool. | |
138 | * | |
139 | * This default is chosen to ensure that a 10G link does not go idle | |
140 | * while a TX queue is stopped after it has become full. A queue is | |
141 | * restarted when it drops below half full. The time this takes (assuming | |
142 | * worst case 3 descriptors per packet and 1024 descriptors) is | |
143 | * 512 / 3 * 1.2 = 205 usec. | |
144 | */ | |
145 | static unsigned int tx_irq_mod_usec = 150; | |
146 | ||
147 | /* This is the first interrupt mode to try out of: | |
148 | * 0 => MSI-X | |
149 | * 1 => MSI | |
150 | * 2 => legacy | |
151 | */ | |
152 | static unsigned int interrupt_mode; | |
153 | ||
154 | /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), | |
155 | * i.e. the number of CPUs among which we may distribute simultaneous | |
156 | * interrupt handling. | |
157 | * | |
158 | * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. | |
cdb08f8f | 159 | * The default (0) means to assign an interrupt to each core. |
8ceee660 BH |
160 | */ |
161 | static unsigned int rss_cpus; | |
162 | module_param(rss_cpus, uint, 0444); | |
163 | MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); | |
164 | ||
b9cc977d BH |
165 | static bool phy_flash_cfg; |
166 | module_param(phy_flash_cfg, bool, 0644); | |
84ae48fe BH |
167 | MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); |
168 | ||
e7bed9c8 | 169 | static unsigned irq_adapt_low_thresh = 8000; |
6fb70fd1 BH |
170 | module_param(irq_adapt_low_thresh, uint, 0644); |
171 | MODULE_PARM_DESC(irq_adapt_low_thresh, | |
172 | "Threshold score for reducing IRQ moderation"); | |
173 | ||
e7bed9c8 | 174 | static unsigned irq_adapt_high_thresh = 16000; |
6fb70fd1 BH |
175 | module_param(irq_adapt_high_thresh, uint, 0644); |
176 | MODULE_PARM_DESC(irq_adapt_high_thresh, | |
177 | "Threshold score for increasing IRQ moderation"); | |
178 | ||
62776d03 BH |
179 | static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | |
180 | NETIF_MSG_LINK | NETIF_MSG_IFDOWN | | |
181 | NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | | |
182 | NETIF_MSG_TX_ERR | NETIF_MSG_HW); | |
183 | module_param(debug, uint, 0); | |
184 | MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); | |
185 | ||
8ceee660 BH |
186 | /************************************************************************** |
187 | * | |
188 | * Utility functions and prototypes | |
189 | * | |
190 | *************************************************************************/ | |
4642610c | 191 | |
261e4d96 | 192 | static int efx_soft_enable_interrupts(struct efx_nic *efx); |
d8291187 | 193 | static void efx_soft_disable_interrupts(struct efx_nic *efx); |
7f967c01 | 194 | static void efx_remove_channel(struct efx_channel *channel); |
4642610c | 195 | static void efx_remove_channels(struct efx_nic *efx); |
7f967c01 | 196 | static const struct efx_channel_type efx_default_channel_type; |
8ceee660 | 197 | static void efx_remove_port(struct efx_nic *efx); |
7f967c01 | 198 | static void efx_init_napi_channel(struct efx_channel *channel); |
8ceee660 | 199 | static void efx_fini_napi(struct efx_nic *efx); |
e8f14992 | 200 | static void efx_fini_napi_channel(struct efx_channel *channel); |
4642610c BH |
201 | static void efx_fini_struct(struct efx_nic *efx); |
202 | static void efx_start_all(struct efx_nic *efx); | |
203 | static void efx_stop_all(struct efx_nic *efx); | |
8ceee660 BH |
204 | |
205 | #define EFX_ASSERT_RESET_SERIALISED(efx) \ | |
206 | do { \ | |
f16aeea0 | 207 | if ((efx->state == STATE_READY) || \ |
626950db | 208 | (efx->state == STATE_RECOVERY) || \ |
332c1ce9 | 209 | (efx->state == STATE_DISABLED)) \ |
8ceee660 BH |
210 | ASSERT_RTNL(); \ |
211 | } while (0) | |
212 | ||
8b7325b4 BH |
213 | static int efx_check_disabled(struct efx_nic *efx) |
214 | { | |
626950db | 215 | if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) { |
8b7325b4 BH |
216 | netif_err(efx, drv, efx->net_dev, |
217 | "device is disabled due to earlier errors\n"); | |
218 | return -EIO; | |
219 | } | |
220 | return 0; | |
221 | } | |
222 | ||
8ceee660 BH |
223 | /************************************************************************** |
224 | * | |
225 | * Event queue processing | |
226 | * | |
227 | *************************************************************************/ | |
228 | ||
229 | /* Process channel's event queue | |
230 | * | |
231 | * This function is responsible for processing the event queue of a | |
232 | * single channel. The caller must guarantee that this function will | |
233 | * never be concurrently called more than once on the same channel, | |
234 | * though different channels may be being processed concurrently. | |
235 | */ | |
fa236e18 | 236 | static int efx_process_channel(struct efx_channel *channel, int budget) |
8ceee660 | 237 | { |
fa236e18 | 238 | int spent; |
8ceee660 | 239 | |
9f2cb71c | 240 | if (unlikely(!channel->enabled)) |
42cbe2d7 | 241 | return 0; |
8ceee660 | 242 | |
fa236e18 | 243 | spent = efx_nic_process_eventq(channel, budget); |
d9ab7007 BH |
244 | if (spent && efx_channel_has_rx_queue(channel)) { |
245 | struct efx_rx_queue *rx_queue = | |
246 | efx_channel_get_rx_queue(channel); | |
247 | ||
ff734ef4 | 248 | efx_rx_flush_packet(channel); |
d8aec745 | 249 | efx_fast_push_rx_descriptors(rx_queue); |
8ceee660 BH |
250 | } |
251 | ||
fa236e18 | 252 | return spent; |
8ceee660 BH |
253 | } |
254 | ||
8ceee660 BH |
255 | /* NAPI poll handler |
256 | * | |
257 | * NAPI guarantees serialisation of polls of the same device, which | |
258 | * provides the guarantee required by efx_process_channel(). | |
259 | */ | |
260 | static int efx_poll(struct napi_struct *napi, int budget) | |
261 | { | |
262 | struct efx_channel *channel = | |
263 | container_of(napi, struct efx_channel, napi_str); | |
62776d03 | 264 | struct efx_nic *efx = channel->efx; |
fa236e18 | 265 | int spent; |
8ceee660 | 266 | |
62776d03 BH |
267 | netif_vdbg(efx, intr, efx->net_dev, |
268 | "channel %d NAPI poll executing on CPU %d\n", | |
269 | channel->channel, raw_smp_processor_id()); | |
8ceee660 | 270 | |
fa236e18 | 271 | spent = efx_process_channel(channel, budget); |
8ceee660 | 272 | |
fa236e18 | 273 | if (spent < budget) { |
9d9a6973 | 274 | if (efx_channel_has_rx_queue(channel) && |
6fb70fd1 BH |
275 | efx->irq_rx_adaptive && |
276 | unlikely(++channel->irq_count == 1000)) { | |
6fb70fd1 BH |
277 | if (unlikely(channel->irq_mod_score < |
278 | irq_adapt_low_thresh)) { | |
0d86ebd8 BH |
279 | if (channel->irq_moderation > 1) { |
280 | channel->irq_moderation -= 1; | |
ef2b90ee | 281 | efx->type->push_irq_moderation(channel); |
0d86ebd8 | 282 | } |
6fb70fd1 BH |
283 | } else if (unlikely(channel->irq_mod_score > |
284 | irq_adapt_high_thresh)) { | |
0d86ebd8 BH |
285 | if (channel->irq_moderation < |
286 | efx->irq_rx_moderation) { | |
287 | channel->irq_moderation += 1; | |
ef2b90ee | 288 | efx->type->push_irq_moderation(channel); |
0d86ebd8 | 289 | } |
6fb70fd1 | 290 | } |
6fb70fd1 BH |
291 | channel->irq_count = 0; |
292 | channel->irq_mod_score = 0; | |
293 | } | |
294 | ||
64d8ad6d BH |
295 | efx_filter_rfs_expire(channel); |
296 | ||
8ceee660 | 297 | /* There is no race here; although napi_disable() will |
288379f0 | 298 | * only wait for napi_complete(), this isn't a problem |
514bedbc | 299 | * since efx_nic_eventq_read_ack() will have no effect if |
8ceee660 BH |
300 | * interrupts have already been disabled. |
301 | */ | |
288379f0 | 302 | napi_complete(napi); |
514bedbc | 303 | efx_nic_eventq_read_ack(channel); |
8ceee660 BH |
304 | } |
305 | ||
fa236e18 | 306 | return spent; |
8ceee660 BH |
307 | } |
308 | ||
8ceee660 BH |
309 | /* Create event queue |
310 | * Event queue memory allocations are done only once. If the channel | |
311 | * is reset, the memory buffer will be reused; this guards against | |
312 | * errors during channel reset and also simplifies interrupt handling. | |
313 | */ | |
314 | static int efx_probe_eventq(struct efx_channel *channel) | |
315 | { | |
ecc910f5 SH |
316 | struct efx_nic *efx = channel->efx; |
317 | unsigned long entries; | |
318 | ||
86ee5302 | 319 | netif_dbg(efx, probe, efx->net_dev, |
62776d03 | 320 | "chan %d create event queue\n", channel->channel); |
8ceee660 | 321 | |
ecc910f5 SH |
322 | /* Build an event queue with room for one event per tx and rx buffer, |
323 | * plus some extra for link state events and MCDI completions. */ | |
324 | entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); | |
325 | EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); | |
326 | channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; | |
327 | ||
152b6a62 | 328 | return efx_nic_probe_eventq(channel); |
8ceee660 BH |
329 | } |
330 | ||
331 | /* Prepare channel's event queue */ | |
261e4d96 | 332 | static int efx_init_eventq(struct efx_channel *channel) |
8ceee660 | 333 | { |
15acb1ce | 334 | struct efx_nic *efx = channel->efx; |
261e4d96 JC |
335 | int rc; |
336 | ||
337 | EFX_WARN_ON_PARANOID(channel->eventq_init); | |
338 | ||
15acb1ce | 339 | netif_dbg(efx, drv, efx->net_dev, |
62776d03 | 340 | "chan %d init event queue\n", channel->channel); |
8ceee660 | 341 | |
261e4d96 JC |
342 | rc = efx_nic_init_eventq(channel); |
343 | if (rc == 0) { | |
15acb1ce | 344 | efx->type->push_irq_moderation(channel); |
261e4d96 JC |
345 | channel->eventq_read_ptr = 0; |
346 | channel->eventq_init = true; | |
347 | } | |
348 | return rc; | |
8ceee660 BH |
349 | } |
350 | ||
9f2cb71c BH |
351 | /* Enable event queue processing and NAPI */ |
352 | static void efx_start_eventq(struct efx_channel *channel) | |
353 | { | |
354 | netif_dbg(channel->efx, ifup, channel->efx->net_dev, | |
355 | "chan %d start event queue\n", channel->channel); | |
356 | ||
514bedbc | 357 | /* Make sure the NAPI handler sees the enabled flag set */ |
9f2cb71c BH |
358 | channel->enabled = true; |
359 | smp_wmb(); | |
360 | ||
361 | napi_enable(&channel->napi_str); | |
362 | efx_nic_eventq_read_ack(channel); | |
363 | } | |
364 | ||
365 | /* Disable event queue processing and NAPI */ | |
366 | static void efx_stop_eventq(struct efx_channel *channel) | |
367 | { | |
368 | if (!channel->enabled) | |
369 | return; | |
370 | ||
371 | napi_disable(&channel->napi_str); | |
372 | channel->enabled = false; | |
373 | } | |
374 | ||
8ceee660 BH |
375 | static void efx_fini_eventq(struct efx_channel *channel) |
376 | { | |
be3fc09c BH |
377 | if (!channel->eventq_init) |
378 | return; | |
379 | ||
62776d03 BH |
380 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
381 | "chan %d fini event queue\n", channel->channel); | |
8ceee660 | 382 | |
152b6a62 | 383 | efx_nic_fini_eventq(channel); |
be3fc09c | 384 | channel->eventq_init = false; |
8ceee660 BH |
385 | } |
386 | ||
387 | static void efx_remove_eventq(struct efx_channel *channel) | |
388 | { | |
62776d03 BH |
389 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
390 | "chan %d remove event queue\n", channel->channel); | |
8ceee660 | 391 | |
152b6a62 | 392 | efx_nic_remove_eventq(channel); |
8ceee660 BH |
393 | } |
394 | ||
395 | /************************************************************************** | |
396 | * | |
397 | * Channel handling | |
398 | * | |
399 | *************************************************************************/ | |
400 | ||
7f967c01 | 401 | /* Allocate and initialise a channel structure. */ |
4642610c BH |
402 | static struct efx_channel * |
403 | efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) | |
404 | { | |
405 | struct efx_channel *channel; | |
406 | struct efx_rx_queue *rx_queue; | |
407 | struct efx_tx_queue *tx_queue; | |
408 | int j; | |
409 | ||
7f967c01 BH |
410 | channel = kzalloc(sizeof(*channel), GFP_KERNEL); |
411 | if (!channel) | |
412 | return NULL; | |
4642610c | 413 | |
7f967c01 BH |
414 | channel->efx = efx; |
415 | channel->channel = i; | |
416 | channel->type = &efx_default_channel_type; | |
4642610c | 417 | |
7f967c01 BH |
418 | for (j = 0; j < EFX_TXQ_TYPES; j++) { |
419 | tx_queue = &channel->tx_queue[j]; | |
420 | tx_queue->efx = efx; | |
421 | tx_queue->queue = i * EFX_TXQ_TYPES + j; | |
422 | tx_queue->channel = channel; | |
423 | } | |
4642610c | 424 | |
7f967c01 BH |
425 | rx_queue = &channel->rx_queue; |
426 | rx_queue->efx = efx; | |
427 | setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, | |
428 | (unsigned long)rx_queue); | |
4642610c | 429 | |
7f967c01 BH |
430 | return channel; |
431 | } | |
432 | ||
433 | /* Allocate and initialise a channel structure, copying parameters | |
434 | * (but not resources) from an old channel structure. | |
435 | */ | |
436 | static struct efx_channel * | |
437 | efx_copy_channel(const struct efx_channel *old_channel) | |
438 | { | |
439 | struct efx_channel *channel; | |
440 | struct efx_rx_queue *rx_queue; | |
441 | struct efx_tx_queue *tx_queue; | |
442 | int j; | |
4642610c | 443 | |
7f967c01 BH |
444 | channel = kmalloc(sizeof(*channel), GFP_KERNEL); |
445 | if (!channel) | |
446 | return NULL; | |
447 | ||
448 | *channel = *old_channel; | |
449 | ||
450 | channel->napi_dev = NULL; | |
451 | memset(&channel->eventq, 0, sizeof(channel->eventq)); | |
4642610c | 452 | |
7f967c01 BH |
453 | for (j = 0; j < EFX_TXQ_TYPES; j++) { |
454 | tx_queue = &channel->tx_queue[j]; | |
455 | if (tx_queue->channel) | |
4642610c | 456 | tx_queue->channel = channel; |
7f967c01 BH |
457 | tx_queue->buffer = NULL; |
458 | memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); | |
4642610c BH |
459 | } |
460 | ||
4642610c | 461 | rx_queue = &channel->rx_queue; |
7f967c01 BH |
462 | rx_queue->buffer = NULL; |
463 | memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); | |
4642610c BH |
464 | setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, |
465 | (unsigned long)rx_queue); | |
466 | ||
467 | return channel; | |
468 | } | |
469 | ||
8ceee660 BH |
470 | static int efx_probe_channel(struct efx_channel *channel) |
471 | { | |
472 | struct efx_tx_queue *tx_queue; | |
473 | struct efx_rx_queue *rx_queue; | |
474 | int rc; | |
475 | ||
62776d03 BH |
476 | netif_dbg(channel->efx, probe, channel->efx->net_dev, |
477 | "creating channel %d\n", channel->channel); | |
8ceee660 | 478 | |
7f967c01 BH |
479 | rc = channel->type->pre_probe(channel); |
480 | if (rc) | |
481 | goto fail; | |
482 | ||
8ceee660 BH |
483 | rc = efx_probe_eventq(channel); |
484 | if (rc) | |
7f967c01 | 485 | goto fail; |
8ceee660 BH |
486 | |
487 | efx_for_each_channel_tx_queue(tx_queue, channel) { | |
488 | rc = efx_probe_tx_queue(tx_queue); | |
489 | if (rc) | |
7f967c01 | 490 | goto fail; |
8ceee660 BH |
491 | } |
492 | ||
493 | efx_for_each_channel_rx_queue(rx_queue, channel) { | |
494 | rc = efx_probe_rx_queue(rx_queue); | |
495 | if (rc) | |
7f967c01 | 496 | goto fail; |
8ceee660 BH |
497 | } |
498 | ||
499 | channel->n_rx_frm_trunc = 0; | |
500 | ||
501 | return 0; | |
502 | ||
7f967c01 BH |
503 | fail: |
504 | efx_remove_channel(channel); | |
8ceee660 BH |
505 | return rc; |
506 | } | |
507 | ||
7f967c01 BH |
508 | static void |
509 | efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) | |
510 | { | |
511 | struct efx_nic *efx = channel->efx; | |
512 | const char *type; | |
513 | int number; | |
514 | ||
515 | number = channel->channel; | |
516 | if (efx->tx_channel_offset == 0) { | |
517 | type = ""; | |
518 | } else if (channel->channel < efx->tx_channel_offset) { | |
519 | type = "-rx"; | |
520 | } else { | |
521 | type = "-tx"; | |
522 | number -= efx->tx_channel_offset; | |
523 | } | |
524 | snprintf(buf, len, "%s%s-%d", efx->name, type, number); | |
525 | } | |
8ceee660 | 526 | |
56536e9c BH |
527 | static void efx_set_channel_names(struct efx_nic *efx) |
528 | { | |
529 | struct efx_channel *channel; | |
56536e9c | 530 | |
7f967c01 BH |
531 | efx_for_each_channel(channel, efx) |
532 | channel->type->get_name(channel, | |
d8291187 BH |
533 | efx->msi_context[channel->channel].name, |
534 | sizeof(efx->msi_context[0].name)); | |
56536e9c BH |
535 | } |
536 | ||
4642610c BH |
537 | static int efx_probe_channels(struct efx_nic *efx) |
538 | { | |
539 | struct efx_channel *channel; | |
540 | int rc; | |
541 | ||
542 | /* Restart special buffer allocation */ | |
543 | efx->next_buffer_table = 0; | |
544 | ||
c92aaff1 BH |
545 | /* Probe channels in reverse, so that any 'extra' channels |
546 | * use the start of the buffer table. This allows the traffic | |
547 | * channels to be resized without moving them or wasting the | |
548 | * entries before them. | |
549 | */ | |
550 | efx_for_each_channel_rev(channel, efx) { | |
4642610c BH |
551 | rc = efx_probe_channel(channel); |
552 | if (rc) { | |
553 | netif_err(efx, probe, efx->net_dev, | |
554 | "failed to create channel %d\n", | |
555 | channel->channel); | |
556 | goto fail; | |
557 | } | |
558 | } | |
559 | efx_set_channel_names(efx); | |
560 | ||
561 | return 0; | |
562 | ||
563 | fail: | |
564 | efx_remove_channels(efx); | |
565 | return rc; | |
566 | } | |
567 | ||
8ceee660 BH |
568 | /* Channels are shutdown and reinitialised whilst the NIC is running |
569 | * to propagate configuration changes (mtu, checksum offload), or | |
570 | * to clear hardware error conditions | |
571 | */ | |
9f2cb71c | 572 | static void efx_start_datapath(struct efx_nic *efx) |
8ceee660 | 573 | { |
85740cdf | 574 | bool old_rx_scatter = efx->rx_scatter; |
8ceee660 BH |
575 | struct efx_tx_queue *tx_queue; |
576 | struct efx_rx_queue *rx_queue; | |
577 | struct efx_channel *channel; | |
85740cdf | 578 | size_t rx_buf_len; |
8ceee660 | 579 | |
f7f13b0b BH |
580 | /* Calculate the rx buffer allocation parameters required to |
581 | * support the current MTU, including padding for header | |
582 | * alignment and overruns. | |
583 | */ | |
43a3739d | 584 | efx->rx_dma_len = (efx->rx_prefix_size + |
272baeeb BH |
585 | EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + |
586 | efx->type->rx_buffer_padding); | |
85740cdf | 587 | rx_buf_len = (sizeof(struct efx_rx_page_state) + |
c14ff2ea | 588 | NET_IP_ALIGN + efx->rx_dma_len); |
85740cdf | 589 | if (rx_buf_len <= PAGE_SIZE) { |
e8c68c0a | 590 | efx->rx_scatter = efx->type->always_rx_scatter; |
85740cdf | 591 | efx->rx_buffer_order = 0; |
85740cdf | 592 | } else if (efx->type->can_rx_scatter) { |
950c54df | 593 | BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE % L1_CACHE_BYTES); |
85740cdf | 594 | BUILD_BUG_ON(sizeof(struct efx_rx_page_state) + |
950c54df BH |
595 | 2 * ALIGN(NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE, |
596 | EFX_RX_BUF_ALIGNMENT) > | |
597 | PAGE_SIZE); | |
85740cdf BH |
598 | efx->rx_scatter = true; |
599 | efx->rx_dma_len = EFX_RX_USR_BUF_SIZE; | |
600 | efx->rx_buffer_order = 0; | |
85740cdf BH |
601 | } else { |
602 | efx->rx_scatter = false; | |
603 | efx->rx_buffer_order = get_order(rx_buf_len); | |
85740cdf BH |
604 | } |
605 | ||
1648a23f DP |
606 | efx_rx_config_page_split(efx); |
607 | if (efx->rx_buffer_order) | |
608 | netif_dbg(efx, drv, efx->net_dev, | |
609 | "RX buf len=%u; page order=%u batch=%u\n", | |
610 | efx->rx_dma_len, efx->rx_buffer_order, | |
611 | efx->rx_pages_per_batch); | |
612 | else | |
613 | netif_dbg(efx, drv, efx->net_dev, | |
614 | "RX buf len=%u step=%u bpp=%u; page batch=%u\n", | |
615 | efx->rx_dma_len, efx->rx_page_buf_step, | |
616 | efx->rx_bufs_per_page, efx->rx_pages_per_batch); | |
2768935a | 617 | |
e8c68c0a | 618 | /* RX filters may also have scatter-enabled flags */ |
85740cdf | 619 | if (efx->rx_scatter != old_rx_scatter) |
add72477 | 620 | efx->type->filter_update_rx_scatter(efx); |
8ceee660 | 621 | |
14bf718f BH |
622 | /* We must keep at least one descriptor in a TX ring empty. |
623 | * We could avoid this when the queue size does not exactly | |
624 | * match the hardware ring size, but it's not that important. | |
625 | * Therefore we stop the queue when one more skb might fill | |
626 | * the ring completely. We wake it when half way back to | |
627 | * empty. | |
628 | */ | |
629 | efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx); | |
630 | efx->txq_wake_thresh = efx->txq_stop_thresh / 2; | |
631 | ||
8ceee660 BH |
632 | /* Initialise the channels */ |
633 | efx_for_each_channel(channel, efx) { | |
3881d8ab | 634 | efx_for_each_channel_tx_queue(tx_queue, channel) { |
bc3c90a2 | 635 | efx_init_tx_queue(tx_queue); |
3881d8ab AR |
636 | atomic_inc(&efx->active_queues); |
637 | } | |
8ceee660 | 638 | |
9f2cb71c | 639 | efx_for_each_channel_rx_queue(rx_queue, channel) { |
bc3c90a2 | 640 | efx_init_rx_queue(rx_queue); |
3881d8ab | 641 | atomic_inc(&efx->active_queues); |
9f2cb71c BH |
642 | efx_nic_generate_fill_event(rx_queue); |
643 | } | |
8ceee660 | 644 | |
85740cdf | 645 | WARN_ON(channel->rx_pkt_n_frags); |
8ceee660 | 646 | } |
8ceee660 | 647 | |
9f2cb71c BH |
648 | if (netif_device_present(efx->net_dev)) |
649 | netif_tx_wake_all_queues(efx->net_dev); | |
8ceee660 BH |
650 | } |
651 | ||
9f2cb71c | 652 | static void efx_stop_datapath(struct efx_nic *efx) |
8ceee660 BH |
653 | { |
654 | struct efx_channel *channel; | |
655 | struct efx_tx_queue *tx_queue; | |
656 | struct efx_rx_queue *rx_queue; | |
6bc5d3a9 | 657 | int rc; |
8ceee660 BH |
658 | |
659 | EFX_ASSERT_RESET_SERIALISED(efx); | |
660 | BUG_ON(efx->port_enabled); | |
661 | ||
d8aec745 BH |
662 | /* Stop RX refill */ |
663 | efx_for_each_channel(channel, efx) { | |
664 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
665 | rx_queue->refill_enabled = false; | |
666 | } | |
667 | ||
8ceee660 | 668 | efx_for_each_channel(channel, efx) { |
9f2cb71c BH |
669 | /* RX packet processing is pipelined, so wait for the |
670 | * NAPI handler to complete. At least event queue 0 | |
671 | * might be kept active by non-data events, so don't | |
672 | * use napi_synchronize() but actually disable NAPI | |
673 | * temporarily. | |
674 | */ | |
675 | if (efx_channel_has_rx_queue(channel)) { | |
676 | efx_stop_eventq(channel); | |
677 | efx_start_eventq(channel); | |
678 | } | |
e42c3d85 | 679 | } |
8ceee660 | 680 | |
e42c3d85 BH |
681 | rc = efx->type->fini_dmaq(efx); |
682 | if (rc && EFX_WORKAROUND_7803(efx)) { | |
683 | /* Schedule a reset to recover from the flush failure. The | |
684 | * descriptor caches reference memory we're about to free, | |
685 | * but falcon_reconfigure_mac_wrapper() won't reconnect | |
686 | * the MACs because of the pending reset. | |
687 | */ | |
688 | netif_err(efx, drv, efx->net_dev, | |
689 | "Resetting to recover from flush failure\n"); | |
690 | efx_schedule_reset(efx, RESET_TYPE_ALL); | |
691 | } else if (rc) { | |
692 | netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); | |
693 | } else { | |
694 | netif_dbg(efx, drv, efx->net_dev, | |
695 | "successfully flushed all queues\n"); | |
696 | } | |
697 | ||
698 | efx_for_each_channel(channel, efx) { | |
8ceee660 BH |
699 | efx_for_each_channel_rx_queue(rx_queue, channel) |
700 | efx_fini_rx_queue(rx_queue); | |
94b274bf | 701 | efx_for_each_possible_channel_tx_queue(tx_queue, channel) |
8ceee660 | 702 | efx_fini_tx_queue(tx_queue); |
8ceee660 BH |
703 | } |
704 | } | |
705 | ||
706 | static void efx_remove_channel(struct efx_channel *channel) | |
707 | { | |
708 | struct efx_tx_queue *tx_queue; | |
709 | struct efx_rx_queue *rx_queue; | |
710 | ||
62776d03 BH |
711 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
712 | "destroy chan %d\n", channel->channel); | |
8ceee660 BH |
713 | |
714 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
715 | efx_remove_rx_queue(rx_queue); | |
94b274bf | 716 | efx_for_each_possible_channel_tx_queue(tx_queue, channel) |
8ceee660 BH |
717 | efx_remove_tx_queue(tx_queue); |
718 | efx_remove_eventq(channel); | |
c31e5f9f | 719 | channel->type->post_remove(channel); |
8ceee660 BH |
720 | } |
721 | ||
4642610c BH |
722 | static void efx_remove_channels(struct efx_nic *efx) |
723 | { | |
724 | struct efx_channel *channel; | |
725 | ||
726 | efx_for_each_channel(channel, efx) | |
727 | efx_remove_channel(channel); | |
728 | } | |
729 | ||
730 | int | |
731 | efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) | |
732 | { | |
733 | struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; | |
734 | u32 old_rxq_entries, old_txq_entries; | |
7f967c01 | 735 | unsigned i, next_buffer_table = 0; |
261e4d96 | 736 | int rc, rc2; |
8b7325b4 BH |
737 | |
738 | rc = efx_check_disabled(efx); | |
739 | if (rc) | |
740 | return rc; | |
7f967c01 BH |
741 | |
742 | /* Not all channels should be reallocated. We must avoid | |
743 | * reallocating their buffer table entries. | |
744 | */ | |
745 | efx_for_each_channel(channel, efx) { | |
746 | struct efx_rx_queue *rx_queue; | |
747 | struct efx_tx_queue *tx_queue; | |
748 | ||
749 | if (channel->type->copy) | |
750 | continue; | |
751 | next_buffer_table = max(next_buffer_table, | |
752 | channel->eventq.index + | |
753 | channel->eventq.entries); | |
754 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
755 | next_buffer_table = max(next_buffer_table, | |
756 | rx_queue->rxd.index + | |
757 | rx_queue->rxd.entries); | |
758 | efx_for_each_channel_tx_queue(tx_queue, channel) | |
759 | next_buffer_table = max(next_buffer_table, | |
760 | tx_queue->txd.index + | |
761 | tx_queue->txd.entries); | |
762 | } | |
4642610c | 763 | |
29c69a48 | 764 | efx_device_detach_sync(efx); |
4642610c | 765 | efx_stop_all(efx); |
d8291187 | 766 | efx_soft_disable_interrupts(efx); |
4642610c | 767 | |
7f967c01 | 768 | /* Clone channels (where possible) */ |
4642610c BH |
769 | memset(other_channel, 0, sizeof(other_channel)); |
770 | for (i = 0; i < efx->n_channels; i++) { | |
7f967c01 BH |
771 | channel = efx->channel[i]; |
772 | if (channel->type->copy) | |
773 | channel = channel->type->copy(channel); | |
4642610c BH |
774 | if (!channel) { |
775 | rc = -ENOMEM; | |
776 | goto out; | |
777 | } | |
778 | other_channel[i] = channel; | |
779 | } | |
780 | ||
781 | /* Swap entry counts and channel pointers */ | |
782 | old_rxq_entries = efx->rxq_entries; | |
783 | old_txq_entries = efx->txq_entries; | |
784 | efx->rxq_entries = rxq_entries; | |
785 | efx->txq_entries = txq_entries; | |
786 | for (i = 0; i < efx->n_channels; i++) { | |
787 | channel = efx->channel[i]; | |
788 | efx->channel[i] = other_channel[i]; | |
789 | other_channel[i] = channel; | |
790 | } | |
791 | ||
7f967c01 BH |
792 | /* Restart buffer table allocation */ |
793 | efx->next_buffer_table = next_buffer_table; | |
e8f14992 | 794 | |
e8f14992 | 795 | for (i = 0; i < efx->n_channels; i++) { |
7f967c01 BH |
796 | channel = efx->channel[i]; |
797 | if (!channel->type->copy) | |
798 | continue; | |
799 | rc = efx_probe_channel(channel); | |
800 | if (rc) | |
801 | goto rollback; | |
802 | efx_init_napi_channel(efx->channel[i]); | |
e8f14992 | 803 | } |
7f967c01 | 804 | |
4642610c | 805 | out: |
7f967c01 BH |
806 | /* Destroy unused channel structures */ |
807 | for (i = 0; i < efx->n_channels; i++) { | |
808 | channel = other_channel[i]; | |
809 | if (channel && channel->type->copy) { | |
810 | efx_fini_napi_channel(channel); | |
811 | efx_remove_channel(channel); | |
812 | kfree(channel); | |
813 | } | |
814 | } | |
4642610c | 815 | |
261e4d96 JC |
816 | rc2 = efx_soft_enable_interrupts(efx); |
817 | if (rc2) { | |
818 | rc = rc ? rc : rc2; | |
819 | netif_err(efx, drv, efx->net_dev, | |
820 | "unable to restart interrupts on channel reallocation\n"); | |
821 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); | |
822 | } else { | |
823 | efx_start_all(efx); | |
824 | netif_device_attach(efx->net_dev); | |
825 | } | |
4642610c BH |
826 | return rc; |
827 | ||
828 | rollback: | |
829 | /* Swap back */ | |
830 | efx->rxq_entries = old_rxq_entries; | |
831 | efx->txq_entries = old_txq_entries; | |
832 | for (i = 0; i < efx->n_channels; i++) { | |
833 | channel = efx->channel[i]; | |
834 | efx->channel[i] = other_channel[i]; | |
835 | other_channel[i] = channel; | |
836 | } | |
837 | goto out; | |
838 | } | |
839 | ||
90d683af | 840 | void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) |
8ceee660 | 841 | { |
90d683af | 842 | mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); |
8ceee660 BH |
843 | } |
844 | ||
7f967c01 BH |
845 | static const struct efx_channel_type efx_default_channel_type = { |
846 | .pre_probe = efx_channel_dummy_op_int, | |
c31e5f9f | 847 | .post_remove = efx_channel_dummy_op_void, |
7f967c01 BH |
848 | .get_name = efx_get_channel_name, |
849 | .copy = efx_copy_channel, | |
850 | .keep_eventq = false, | |
851 | }; | |
852 | ||
853 | int efx_channel_dummy_op_int(struct efx_channel *channel) | |
854 | { | |
855 | return 0; | |
856 | } | |
857 | ||
c31e5f9f SH |
858 | void efx_channel_dummy_op_void(struct efx_channel *channel) |
859 | { | |
860 | } | |
861 | ||
8ceee660 BH |
862 | /************************************************************************** |
863 | * | |
864 | * Port handling | |
865 | * | |
866 | **************************************************************************/ | |
867 | ||
868 | /* This ensures that the kernel is kept informed (via | |
869 | * netif_carrier_on/off) of the link status, and also maintains the | |
870 | * link status's stop on the port's TX queue. | |
871 | */ | |
fdaa9aed | 872 | void efx_link_status_changed(struct efx_nic *efx) |
8ceee660 | 873 | { |
eb50c0d6 BH |
874 | struct efx_link_state *link_state = &efx->link_state; |
875 | ||
8ceee660 BH |
876 | /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure |
877 | * that no events are triggered between unregister_netdev() and the | |
878 | * driver unloading. A more general condition is that NETDEV_CHANGE | |
879 | * can only be generated between NETDEV_UP and NETDEV_DOWN */ | |
880 | if (!netif_running(efx->net_dev)) | |
881 | return; | |
882 | ||
eb50c0d6 | 883 | if (link_state->up != netif_carrier_ok(efx->net_dev)) { |
8ceee660 BH |
884 | efx->n_link_state_changes++; |
885 | ||
eb50c0d6 | 886 | if (link_state->up) |
8ceee660 BH |
887 | netif_carrier_on(efx->net_dev); |
888 | else | |
889 | netif_carrier_off(efx->net_dev); | |
890 | } | |
891 | ||
892 | /* Status message for kernel log */ | |
2aa9ef11 | 893 | if (link_state->up) |
62776d03 | 894 | netif_info(efx, link, efx->net_dev, |
964e6135 | 895 | "link up at %uMbps %s-duplex (MTU %d)\n", |
62776d03 | 896 | link_state->speed, link_state->fd ? "full" : "half", |
964e6135 | 897 | efx->net_dev->mtu); |
2aa9ef11 | 898 | else |
62776d03 | 899 | netif_info(efx, link, efx->net_dev, "link down\n"); |
8ceee660 BH |
900 | } |
901 | ||
d3245b28 BH |
902 | void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) |
903 | { | |
904 | efx->link_advertising = advertising; | |
905 | if (advertising) { | |
906 | if (advertising & ADVERTISED_Pause) | |
907 | efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); | |
908 | else | |
909 | efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); | |
910 | if (advertising & ADVERTISED_Asym_Pause) | |
911 | efx->wanted_fc ^= EFX_FC_TX; | |
912 | } | |
913 | } | |
914 | ||
b5626946 | 915 | void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) |
d3245b28 BH |
916 | { |
917 | efx->wanted_fc = wanted_fc; | |
918 | if (efx->link_advertising) { | |
919 | if (wanted_fc & EFX_FC_RX) | |
920 | efx->link_advertising |= (ADVERTISED_Pause | | |
921 | ADVERTISED_Asym_Pause); | |
922 | else | |
923 | efx->link_advertising &= ~(ADVERTISED_Pause | | |
924 | ADVERTISED_Asym_Pause); | |
925 | if (wanted_fc & EFX_FC_TX) | |
926 | efx->link_advertising ^= ADVERTISED_Asym_Pause; | |
927 | } | |
928 | } | |
929 | ||
115122af BH |
930 | static void efx_fini_port(struct efx_nic *efx); |
931 | ||
d3245b28 BH |
932 | /* Push loopback/power/transmit disable settings to the PHY, and reconfigure |
933 | * the MAC appropriately. All other PHY configuration changes are pushed | |
934 | * through phy_op->set_settings(), and pushed asynchronously to the MAC | |
935 | * through efx_monitor(). | |
936 | * | |
937 | * Callers must hold the mac_lock | |
938 | */ | |
939 | int __efx_reconfigure_port(struct efx_nic *efx) | |
8ceee660 | 940 | { |
d3245b28 BH |
941 | enum efx_phy_mode phy_mode; |
942 | int rc; | |
8ceee660 | 943 | |
d3245b28 | 944 | WARN_ON(!mutex_is_locked(&efx->mac_lock)); |
8ceee660 | 945 | |
d3245b28 BH |
946 | /* Disable PHY transmit in mac level loopbacks */ |
947 | phy_mode = efx->phy_mode; | |
177dfcd8 BH |
948 | if (LOOPBACK_INTERNAL(efx)) |
949 | efx->phy_mode |= PHY_MODE_TX_DISABLED; | |
950 | else | |
951 | efx->phy_mode &= ~PHY_MODE_TX_DISABLED; | |
177dfcd8 | 952 | |
d3245b28 | 953 | rc = efx->type->reconfigure_port(efx); |
8ceee660 | 954 | |
d3245b28 BH |
955 | if (rc) |
956 | efx->phy_mode = phy_mode; | |
177dfcd8 | 957 | |
d3245b28 | 958 | return rc; |
8ceee660 BH |
959 | } |
960 | ||
961 | /* Reinitialise the MAC to pick up new PHY settings, even if the port is | |
962 | * disabled. */ | |
d3245b28 | 963 | int efx_reconfigure_port(struct efx_nic *efx) |
8ceee660 | 964 | { |
d3245b28 BH |
965 | int rc; |
966 | ||
8ceee660 BH |
967 | EFX_ASSERT_RESET_SERIALISED(efx); |
968 | ||
969 | mutex_lock(&efx->mac_lock); | |
d3245b28 | 970 | rc = __efx_reconfigure_port(efx); |
8ceee660 | 971 | mutex_unlock(&efx->mac_lock); |
d3245b28 BH |
972 | |
973 | return rc; | |
8ceee660 BH |
974 | } |
975 | ||
8be4f3e6 BH |
976 | /* Asynchronous work item for changing MAC promiscuity and multicast |
977 | * hash. Avoid a drain/rx_ingress enable by reconfiguring the current | |
978 | * MAC directly. */ | |
766ca0fa BH |
979 | static void efx_mac_work(struct work_struct *data) |
980 | { | |
981 | struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); | |
982 | ||
983 | mutex_lock(&efx->mac_lock); | |
30b81cda | 984 | if (efx->port_enabled) |
710b208d | 985 | efx->type->reconfigure_mac(efx); |
766ca0fa BH |
986 | mutex_unlock(&efx->mac_lock); |
987 | } | |
988 | ||
8ceee660 BH |
989 | static int efx_probe_port(struct efx_nic *efx) |
990 | { | |
991 | int rc; | |
992 | ||
62776d03 | 993 | netif_dbg(efx, probe, efx->net_dev, "create port\n"); |
8ceee660 | 994 | |
ff3b00a0 SH |
995 | if (phy_flash_cfg) |
996 | efx->phy_mode = PHY_MODE_SPECIAL; | |
997 | ||
ef2b90ee BH |
998 | /* Connect up MAC/PHY operations table */ |
999 | rc = efx->type->probe_port(efx); | |
8ceee660 | 1000 | if (rc) |
e42de262 | 1001 | return rc; |
8ceee660 | 1002 | |
e332bcb3 BH |
1003 | /* Initialise MAC address to permanent address */ |
1004 | memcpy(efx->net_dev->dev_addr, efx->net_dev->perm_addr, ETH_ALEN); | |
8ceee660 BH |
1005 | |
1006 | return 0; | |
8ceee660 BH |
1007 | } |
1008 | ||
1009 | static int efx_init_port(struct efx_nic *efx) | |
1010 | { | |
1011 | int rc; | |
1012 | ||
62776d03 | 1013 | netif_dbg(efx, drv, efx->net_dev, "init port\n"); |
8ceee660 | 1014 | |
1dfc5cea BH |
1015 | mutex_lock(&efx->mac_lock); |
1016 | ||
177dfcd8 | 1017 | rc = efx->phy_op->init(efx); |
8ceee660 | 1018 | if (rc) |
1dfc5cea | 1019 | goto fail1; |
8ceee660 | 1020 | |
dc8cfa55 | 1021 | efx->port_initialized = true; |
1dfc5cea | 1022 | |
d3245b28 BH |
1023 | /* Reconfigure the MAC before creating dma queues (required for |
1024 | * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ | |
710b208d | 1025 | efx->type->reconfigure_mac(efx); |
d3245b28 BH |
1026 | |
1027 | /* Ensure the PHY advertises the correct flow control settings */ | |
1028 | rc = efx->phy_op->reconfigure(efx); | |
1029 | if (rc) | |
1030 | goto fail2; | |
1031 | ||
1dfc5cea | 1032 | mutex_unlock(&efx->mac_lock); |
8ceee660 | 1033 | return 0; |
177dfcd8 | 1034 | |
1dfc5cea | 1035 | fail2: |
177dfcd8 | 1036 | efx->phy_op->fini(efx); |
1dfc5cea BH |
1037 | fail1: |
1038 | mutex_unlock(&efx->mac_lock); | |
177dfcd8 | 1039 | return rc; |
8ceee660 BH |
1040 | } |
1041 | ||
8ceee660 BH |
1042 | static void efx_start_port(struct efx_nic *efx) |
1043 | { | |
62776d03 | 1044 | netif_dbg(efx, ifup, efx->net_dev, "start port\n"); |
8ceee660 BH |
1045 | BUG_ON(efx->port_enabled); |
1046 | ||
1047 | mutex_lock(&efx->mac_lock); | |
dc8cfa55 | 1048 | efx->port_enabled = true; |
8be4f3e6 BH |
1049 | |
1050 | /* efx_mac_work() might have been scheduled after efx_stop_port(), | |
1051 | * and then cancelled by efx_flush_all() */ | |
710b208d | 1052 | efx->type->reconfigure_mac(efx); |
8be4f3e6 | 1053 | |
8ceee660 BH |
1054 | mutex_unlock(&efx->mac_lock); |
1055 | } | |
1056 | ||
fdaa9aed | 1057 | /* Prevent efx_mac_work() and efx_monitor() from working */ |
8ceee660 BH |
1058 | static void efx_stop_port(struct efx_nic *efx) |
1059 | { | |
62776d03 | 1060 | netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); |
8ceee660 BH |
1061 | |
1062 | mutex_lock(&efx->mac_lock); | |
dc8cfa55 | 1063 | efx->port_enabled = false; |
8ceee660 BH |
1064 | mutex_unlock(&efx->mac_lock); |
1065 | ||
1066 | /* Serialise against efx_set_multicast_list() */ | |
73ba7b68 BH |
1067 | netif_addr_lock_bh(efx->net_dev); |
1068 | netif_addr_unlock_bh(efx->net_dev); | |
8ceee660 BH |
1069 | } |
1070 | ||
1071 | static void efx_fini_port(struct efx_nic *efx) | |
1072 | { | |
62776d03 | 1073 | netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); |
8ceee660 BH |
1074 | |
1075 | if (!efx->port_initialized) | |
1076 | return; | |
1077 | ||
177dfcd8 | 1078 | efx->phy_op->fini(efx); |
dc8cfa55 | 1079 | efx->port_initialized = false; |
8ceee660 | 1080 | |
eb50c0d6 | 1081 | efx->link_state.up = false; |
8ceee660 BH |
1082 | efx_link_status_changed(efx); |
1083 | } | |
1084 | ||
1085 | static void efx_remove_port(struct efx_nic *efx) | |
1086 | { | |
62776d03 | 1087 | netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); |
8ceee660 | 1088 | |
ef2b90ee | 1089 | efx->type->remove_port(efx); |
8ceee660 BH |
1090 | } |
1091 | ||
1092 | /************************************************************************** | |
1093 | * | |
1094 | * NIC handling | |
1095 | * | |
1096 | **************************************************************************/ | |
1097 | ||
1098 | /* This configures the PCI device to enable I/O and DMA. */ | |
1099 | static int efx_init_io(struct efx_nic *efx) | |
1100 | { | |
1101 | struct pci_dev *pci_dev = efx->pci_dev; | |
1102 | dma_addr_t dma_mask = efx->type->max_dma_mask; | |
b105798f | 1103 | unsigned int mem_map_size = efx->type->mem_map_size(efx); |
8ceee660 BH |
1104 | int rc; |
1105 | ||
62776d03 | 1106 | netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); |
8ceee660 BH |
1107 | |
1108 | rc = pci_enable_device(pci_dev); | |
1109 | if (rc) { | |
62776d03 BH |
1110 | netif_err(efx, probe, efx->net_dev, |
1111 | "failed to enable PCI device\n"); | |
8ceee660 BH |
1112 | goto fail1; |
1113 | } | |
1114 | ||
1115 | pci_set_master(pci_dev); | |
1116 | ||
1117 | /* Set the PCI DMA mask. Try all possibilities from our | |
1118 | * genuine mask down to 32 bits, because some architectures | |
1119 | * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit | |
1120 | * masks event though they reject 46 bit masks. | |
1121 | */ | |
1122 | while (dma_mask > 0x7fffffffUL) { | |
0e33d870 BH |
1123 | if (dma_supported(&pci_dev->dev, dma_mask)) { |
1124 | rc = dma_set_mask(&pci_dev->dev, dma_mask); | |
e9e01846 BH |
1125 | if (rc == 0) |
1126 | break; | |
1127 | } | |
8ceee660 BH |
1128 | dma_mask >>= 1; |
1129 | } | |
1130 | if (rc) { | |
62776d03 BH |
1131 | netif_err(efx, probe, efx->net_dev, |
1132 | "could not find a suitable DMA mask\n"); | |
8ceee660 BH |
1133 | goto fail2; |
1134 | } | |
62776d03 BH |
1135 | netif_dbg(efx, probe, efx->net_dev, |
1136 | "using DMA mask %llx\n", (unsigned long long) dma_mask); | |
0e33d870 | 1137 | rc = dma_set_coherent_mask(&pci_dev->dev, dma_mask); |
8ceee660 | 1138 | if (rc) { |
0e33d870 BH |
1139 | /* dma_set_coherent_mask() is not *allowed* to |
1140 | * fail with a mask that dma_set_mask() accepted, | |
8ceee660 BH |
1141 | * but just in case... |
1142 | */ | |
62776d03 BH |
1143 | netif_err(efx, probe, efx->net_dev, |
1144 | "failed to set consistent DMA mask\n"); | |
8ceee660 BH |
1145 | goto fail2; |
1146 | } | |
1147 | ||
dc803df8 BH |
1148 | efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR); |
1149 | rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc"); | |
8ceee660 | 1150 | if (rc) { |
62776d03 BH |
1151 | netif_err(efx, probe, efx->net_dev, |
1152 | "request for memory BAR failed\n"); | |
8ceee660 BH |
1153 | rc = -EIO; |
1154 | goto fail3; | |
1155 | } | |
b105798f | 1156 | efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size); |
8ceee660 | 1157 | if (!efx->membase) { |
62776d03 BH |
1158 | netif_err(efx, probe, efx->net_dev, |
1159 | "could not map memory BAR at %llx+%x\n", | |
b105798f | 1160 | (unsigned long long)efx->membase_phys, mem_map_size); |
8ceee660 BH |
1161 | rc = -ENOMEM; |
1162 | goto fail4; | |
1163 | } | |
62776d03 BH |
1164 | netif_dbg(efx, probe, efx->net_dev, |
1165 | "memory BAR at %llx+%x (virtual %p)\n", | |
b105798f BH |
1166 | (unsigned long long)efx->membase_phys, mem_map_size, |
1167 | efx->membase); | |
8ceee660 BH |
1168 | |
1169 | return 0; | |
1170 | ||
1171 | fail4: | |
dc803df8 | 1172 | pci_release_region(efx->pci_dev, EFX_MEM_BAR); |
8ceee660 | 1173 | fail3: |
2c118e0f | 1174 | efx->membase_phys = 0; |
8ceee660 BH |
1175 | fail2: |
1176 | pci_disable_device(efx->pci_dev); | |
1177 | fail1: | |
1178 | return rc; | |
1179 | } | |
1180 | ||
1181 | static void efx_fini_io(struct efx_nic *efx) | |
1182 | { | |
62776d03 | 1183 | netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); |
8ceee660 BH |
1184 | |
1185 | if (efx->membase) { | |
1186 | iounmap(efx->membase); | |
1187 | efx->membase = NULL; | |
1188 | } | |
1189 | ||
1190 | if (efx->membase_phys) { | |
dc803df8 | 1191 | pci_release_region(efx->pci_dev, EFX_MEM_BAR); |
2c118e0f | 1192 | efx->membase_phys = 0; |
8ceee660 BH |
1193 | } |
1194 | ||
1195 | pci_disable_device(efx->pci_dev); | |
1196 | } | |
1197 | ||
a9a52506 | 1198 | static unsigned int efx_wanted_parallelism(struct efx_nic *efx) |
46123d04 | 1199 | { |
cdb08f8f | 1200 | cpumask_var_t thread_mask; |
a16e5b24 | 1201 | unsigned int count; |
46123d04 | 1202 | int cpu; |
5b874e25 | 1203 | |
cd2d5b52 BH |
1204 | if (rss_cpus) { |
1205 | count = rss_cpus; | |
1206 | } else { | |
1207 | if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { | |
1208 | netif_warn(efx, probe, efx->net_dev, | |
1209 | "RSS disabled due to allocation failure\n"); | |
1210 | return 1; | |
1211 | } | |
46123d04 | 1212 | |
cd2d5b52 BH |
1213 | count = 0; |
1214 | for_each_online_cpu(cpu) { | |
1215 | if (!cpumask_test_cpu(cpu, thread_mask)) { | |
1216 | ++count; | |
1217 | cpumask_or(thread_mask, thread_mask, | |
1218 | topology_thread_cpumask(cpu)); | |
1219 | } | |
1220 | } | |
1221 | ||
1222 | free_cpumask_var(thread_mask); | |
2f8975fb RR |
1223 | } |
1224 | ||
cd2d5b52 BH |
1225 | /* If RSS is requested for the PF *and* VFs then we can't write RSS |
1226 | * table entries that are inaccessible to VFs | |
1227 | */ | |
1228 | if (efx_sriov_wanted(efx) && efx_vf_size(efx) > 1 && | |
1229 | count > efx_vf_size(efx)) { | |
1230 | netif_warn(efx, probe, efx->net_dev, | |
1231 | "Reducing number of RSS channels from %u to %u for " | |
1232 | "VF support. Increase vf-msix-limit to use more " | |
1233 | "channels on the PF.\n", | |
1234 | count, efx_vf_size(efx)); | |
1235 | count = efx_vf_size(efx); | |
46123d04 BH |
1236 | } |
1237 | ||
1238 | return count; | |
1239 | } | |
1240 | ||
1241 | /* Probe the number and type of interrupts we are able to obtain, and | |
1242 | * the resulting numbers of channels and RX queues. | |
1243 | */ | |
64d8ad6d | 1244 | static int efx_probe_interrupts(struct efx_nic *efx) |
8ceee660 | 1245 | { |
7f967c01 BH |
1246 | unsigned int extra_channels = 0; |
1247 | unsigned int i, j; | |
a16e5b24 | 1248 | int rc; |
8ceee660 | 1249 | |
7f967c01 BH |
1250 | for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) |
1251 | if (efx->extra_channel_type[i]) | |
1252 | ++extra_channels; | |
1253 | ||
8ceee660 | 1254 | if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { |
46123d04 | 1255 | struct msix_entry xentries[EFX_MAX_CHANNELS]; |
a16e5b24 | 1256 | unsigned int n_channels; |
aa6ef27e | 1257 | |
a9a52506 | 1258 | n_channels = efx_wanted_parallelism(efx); |
a4900ac9 BH |
1259 | if (separate_tx_channels) |
1260 | n_channels *= 2; | |
7f967c01 | 1261 | n_channels += extra_channels; |
b105798f | 1262 | n_channels = min(n_channels, efx->max_channels); |
8ceee660 | 1263 | |
a4900ac9 | 1264 | for (i = 0; i < n_channels; i++) |
8ceee660 | 1265 | xentries[i].entry = i; |
a4900ac9 | 1266 | rc = pci_enable_msix(efx->pci_dev, xentries, n_channels); |
8ceee660 | 1267 | if (rc > 0) { |
62776d03 BH |
1268 | netif_err(efx, drv, efx->net_dev, |
1269 | "WARNING: Insufficient MSI-X vectors" | |
a16e5b24 | 1270 | " available (%d < %u).\n", rc, n_channels); |
62776d03 BH |
1271 | netif_err(efx, drv, efx->net_dev, |
1272 | "WARNING: Performance may be reduced.\n"); | |
a4900ac9 BH |
1273 | EFX_BUG_ON_PARANOID(rc >= n_channels); |
1274 | n_channels = rc; | |
8ceee660 | 1275 | rc = pci_enable_msix(efx->pci_dev, xentries, |
a4900ac9 | 1276 | n_channels); |
8ceee660 BH |
1277 | } |
1278 | ||
1279 | if (rc == 0) { | |
a4900ac9 | 1280 | efx->n_channels = n_channels; |
7f967c01 BH |
1281 | if (n_channels > extra_channels) |
1282 | n_channels -= extra_channels; | |
a4900ac9 | 1283 | if (separate_tx_channels) { |
7f967c01 BH |
1284 | efx->n_tx_channels = max(n_channels / 2, 1U); |
1285 | efx->n_rx_channels = max(n_channels - | |
1286 | efx->n_tx_channels, | |
1287 | 1U); | |
a4900ac9 | 1288 | } else { |
7f967c01 BH |
1289 | efx->n_tx_channels = n_channels; |
1290 | efx->n_rx_channels = n_channels; | |
a4900ac9 | 1291 | } |
7f967c01 | 1292 | for (i = 0; i < efx->n_channels; i++) |
f7d12cdc BH |
1293 | efx_get_channel(efx, i)->irq = |
1294 | xentries[i].vector; | |
8ceee660 BH |
1295 | } else { |
1296 | /* Fall back to single channel MSI */ | |
1297 | efx->interrupt_mode = EFX_INT_MODE_MSI; | |
62776d03 BH |
1298 | netif_err(efx, drv, efx->net_dev, |
1299 | "could not enable MSI-X\n"); | |
8ceee660 BH |
1300 | } |
1301 | } | |
1302 | ||
1303 | /* Try single interrupt MSI */ | |
1304 | if (efx->interrupt_mode == EFX_INT_MODE_MSI) { | |
28b581ab | 1305 | efx->n_channels = 1; |
a4900ac9 BH |
1306 | efx->n_rx_channels = 1; |
1307 | efx->n_tx_channels = 1; | |
8ceee660 BH |
1308 | rc = pci_enable_msi(efx->pci_dev); |
1309 | if (rc == 0) { | |
f7d12cdc | 1310 | efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; |
8ceee660 | 1311 | } else { |
62776d03 BH |
1312 | netif_err(efx, drv, efx->net_dev, |
1313 | "could not enable MSI\n"); | |
8ceee660 BH |
1314 | efx->interrupt_mode = EFX_INT_MODE_LEGACY; |
1315 | } | |
1316 | } | |
1317 | ||
1318 | /* Assume legacy interrupts */ | |
1319 | if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { | |
28b581ab | 1320 | efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); |
a4900ac9 BH |
1321 | efx->n_rx_channels = 1; |
1322 | efx->n_tx_channels = 1; | |
8ceee660 BH |
1323 | efx->legacy_irq = efx->pci_dev->irq; |
1324 | } | |
64d8ad6d | 1325 | |
7f967c01 BH |
1326 | /* Assign extra channels if possible */ |
1327 | j = efx->n_channels; | |
1328 | for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { | |
1329 | if (!efx->extra_channel_type[i]) | |
1330 | continue; | |
1331 | if (efx->interrupt_mode != EFX_INT_MODE_MSIX || | |
1332 | efx->n_channels <= extra_channels) { | |
1333 | efx->extra_channel_type[i]->handle_no_channel(efx); | |
1334 | } else { | |
1335 | --j; | |
1336 | efx_get_channel(efx, j)->type = | |
1337 | efx->extra_channel_type[i]; | |
1338 | } | |
1339 | } | |
1340 | ||
cd2d5b52 | 1341 | /* RSS might be usable on VFs even if it is disabled on the PF */ |
3132d282 | 1342 | efx->rss_spread = ((efx->n_rx_channels > 1 || !efx_sriov_wanted(efx)) ? |
cd2d5b52 BH |
1343 | efx->n_rx_channels : efx_vf_size(efx)); |
1344 | ||
64d8ad6d | 1345 | return 0; |
8ceee660 BH |
1346 | } |
1347 | ||
261e4d96 | 1348 | static int efx_soft_enable_interrupts(struct efx_nic *efx) |
9f2cb71c | 1349 | { |
261e4d96 JC |
1350 | struct efx_channel *channel, *end_channel; |
1351 | int rc; | |
9f2cb71c | 1352 | |
8b7325b4 BH |
1353 | BUG_ON(efx->state == STATE_DISABLED); |
1354 | ||
d8291187 BH |
1355 | efx->irq_soft_enabled = true; |
1356 | smp_wmb(); | |
9f2cb71c BH |
1357 | |
1358 | efx_for_each_channel(channel, efx) { | |
261e4d96 JC |
1359 | if (!channel->type->keep_eventq) { |
1360 | rc = efx_init_eventq(channel); | |
1361 | if (rc) | |
1362 | goto fail; | |
1363 | } | |
9f2cb71c BH |
1364 | efx_start_eventq(channel); |
1365 | } | |
1366 | ||
1367 | efx_mcdi_mode_event(efx); | |
261e4d96 JC |
1368 | |
1369 | return 0; | |
1370 | fail: | |
1371 | end_channel = channel; | |
1372 | efx_for_each_channel(channel, efx) { | |
1373 | if (channel == end_channel) | |
1374 | break; | |
1375 | efx_stop_eventq(channel); | |
1376 | if (!channel->type->keep_eventq) | |
1377 | efx_fini_eventq(channel); | |
1378 | } | |
1379 | ||
1380 | return rc; | |
9f2cb71c BH |
1381 | } |
1382 | ||
d8291187 | 1383 | static void efx_soft_disable_interrupts(struct efx_nic *efx) |
9f2cb71c BH |
1384 | { |
1385 | struct efx_channel *channel; | |
1386 | ||
8b7325b4 BH |
1387 | if (efx->state == STATE_DISABLED) |
1388 | return; | |
1389 | ||
9f2cb71c BH |
1390 | efx_mcdi_mode_poll(efx); |
1391 | ||
d8291187 BH |
1392 | efx->irq_soft_enabled = false; |
1393 | smp_wmb(); | |
1394 | ||
1395 | if (efx->legacy_irq) | |
9f2cb71c | 1396 | synchronize_irq(efx->legacy_irq); |
9f2cb71c BH |
1397 | |
1398 | efx_for_each_channel(channel, efx) { | |
1399 | if (channel->irq) | |
1400 | synchronize_irq(channel->irq); | |
1401 | ||
1402 | efx_stop_eventq(channel); | |
d8291187 | 1403 | if (!channel->type->keep_eventq) |
7f967c01 | 1404 | efx_fini_eventq(channel); |
9f2cb71c | 1405 | } |
cade715f BH |
1406 | |
1407 | /* Flush the asynchronous MCDI request queue */ | |
1408 | efx_mcdi_flush_async(efx); | |
9f2cb71c BH |
1409 | } |
1410 | ||
261e4d96 | 1411 | static int efx_enable_interrupts(struct efx_nic *efx) |
d8291187 | 1412 | { |
261e4d96 JC |
1413 | struct efx_channel *channel, *end_channel; |
1414 | int rc; | |
d8291187 BH |
1415 | |
1416 | BUG_ON(efx->state == STATE_DISABLED); | |
1417 | ||
1418 | if (efx->eeh_disabled_legacy_irq) { | |
1419 | enable_irq(efx->legacy_irq); | |
1420 | efx->eeh_disabled_legacy_irq = false; | |
1421 | } | |
1422 | ||
86094f7f | 1423 | efx->type->irq_enable_master(efx); |
d8291187 BH |
1424 | |
1425 | efx_for_each_channel(channel, efx) { | |
261e4d96 JC |
1426 | if (channel->type->keep_eventq) { |
1427 | rc = efx_init_eventq(channel); | |
1428 | if (rc) | |
1429 | goto fail; | |
1430 | } | |
1431 | } | |
1432 | ||
1433 | rc = efx_soft_enable_interrupts(efx); | |
1434 | if (rc) | |
1435 | goto fail; | |
1436 | ||
1437 | return 0; | |
1438 | ||
1439 | fail: | |
1440 | end_channel = channel; | |
1441 | efx_for_each_channel(channel, efx) { | |
1442 | if (channel == end_channel) | |
1443 | break; | |
d8291187 | 1444 | if (channel->type->keep_eventq) |
261e4d96 | 1445 | efx_fini_eventq(channel); |
d8291187 BH |
1446 | } |
1447 | ||
261e4d96 JC |
1448 | efx->type->irq_disable_non_ev(efx); |
1449 | ||
1450 | return rc; | |
d8291187 BH |
1451 | } |
1452 | ||
1453 | static void efx_disable_interrupts(struct efx_nic *efx) | |
1454 | { | |
1455 | struct efx_channel *channel; | |
1456 | ||
1457 | efx_soft_disable_interrupts(efx); | |
1458 | ||
1459 | efx_for_each_channel(channel, efx) { | |
1460 | if (channel->type->keep_eventq) | |
1461 | efx_fini_eventq(channel); | |
1462 | } | |
1463 | ||
86094f7f | 1464 | efx->type->irq_disable_non_ev(efx); |
d8291187 BH |
1465 | } |
1466 | ||
8ceee660 BH |
1467 | static void efx_remove_interrupts(struct efx_nic *efx) |
1468 | { | |
1469 | struct efx_channel *channel; | |
1470 | ||
1471 | /* Remove MSI/MSI-X interrupts */ | |
64ee3120 | 1472 | efx_for_each_channel(channel, efx) |
8ceee660 BH |
1473 | channel->irq = 0; |
1474 | pci_disable_msi(efx->pci_dev); | |
1475 | pci_disable_msix(efx->pci_dev); | |
1476 | ||
1477 | /* Remove legacy interrupt */ | |
1478 | efx->legacy_irq = 0; | |
1479 | } | |
1480 | ||
8831da7b | 1481 | static void efx_set_channels(struct efx_nic *efx) |
8ceee660 | 1482 | { |
602a5322 BH |
1483 | struct efx_channel *channel; |
1484 | struct efx_tx_queue *tx_queue; | |
1485 | ||
97653431 | 1486 | efx->tx_channel_offset = |
a4900ac9 | 1487 | separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0; |
602a5322 | 1488 | |
79d68b37 SH |
1489 | /* We need to mark which channels really have RX and TX |
1490 | * queues, and adjust the TX queue numbers if we have separate | |
602a5322 BH |
1491 | * RX-only and TX-only channels. |
1492 | */ | |
1493 | efx_for_each_channel(channel, efx) { | |
79d68b37 SH |
1494 | if (channel->channel < efx->n_rx_channels) |
1495 | channel->rx_queue.core_index = channel->channel; | |
1496 | else | |
1497 | channel->rx_queue.core_index = -1; | |
1498 | ||
602a5322 BH |
1499 | efx_for_each_channel_tx_queue(tx_queue, channel) |
1500 | tx_queue->queue -= (efx->tx_channel_offset * | |
1501 | EFX_TXQ_TYPES); | |
1502 | } | |
8ceee660 BH |
1503 | } |
1504 | ||
1505 | static int efx_probe_nic(struct efx_nic *efx) | |
1506 | { | |
765c9f46 | 1507 | size_t i; |
8ceee660 BH |
1508 | int rc; |
1509 | ||
62776d03 | 1510 | netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); |
8ceee660 BH |
1511 | |
1512 | /* Carry out hardware-type specific initialisation */ | |
ef2b90ee | 1513 | rc = efx->type->probe(efx); |
8ceee660 BH |
1514 | if (rc) |
1515 | return rc; | |
1516 | ||
a4900ac9 | 1517 | /* Determine the number of channels and queues by trying to hook |
8ceee660 | 1518 | * in MSI-X interrupts. */ |
64d8ad6d BH |
1519 | rc = efx_probe_interrupts(efx); |
1520 | if (rc) | |
c15eed22 | 1521 | goto fail1; |
8ceee660 | 1522 | |
c15eed22 BH |
1523 | rc = efx->type->dimension_resources(efx); |
1524 | if (rc) | |
1525 | goto fail2; | |
28e47c49 | 1526 | |
5d3a6fca BH |
1527 | if (efx->n_channels > 1) |
1528 | get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key)); | |
765c9f46 | 1529 | for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) |
278bc429 | 1530 | efx->rx_indir_table[i] = |
cd2d5b52 | 1531 | ethtool_rxfh_indir_default(i, efx->rss_spread); |
5d3a6fca | 1532 | |
8831da7b | 1533 | efx_set_channels(efx); |
c4f4adc7 BH |
1534 | netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); |
1535 | netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); | |
8ceee660 BH |
1536 | |
1537 | /* Initialise the interrupt moderation settings */ | |
9e393b30 BH |
1538 | efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, |
1539 | true); | |
8ceee660 BH |
1540 | |
1541 | return 0; | |
64d8ad6d | 1542 | |
c15eed22 BH |
1543 | fail2: |
1544 | efx_remove_interrupts(efx); | |
1545 | fail1: | |
64d8ad6d BH |
1546 | efx->type->remove(efx); |
1547 | return rc; | |
8ceee660 BH |
1548 | } |
1549 | ||
1550 | static void efx_remove_nic(struct efx_nic *efx) | |
1551 | { | |
62776d03 | 1552 | netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); |
8ceee660 BH |
1553 | |
1554 | efx_remove_interrupts(efx); | |
ef2b90ee | 1555 | efx->type->remove(efx); |
8ceee660 BH |
1556 | } |
1557 | ||
add72477 BH |
1558 | static int efx_probe_filters(struct efx_nic *efx) |
1559 | { | |
1560 | int rc; | |
1561 | ||
1562 | spin_lock_init(&efx->filter_lock); | |
1563 | ||
1564 | rc = efx->type->filter_table_probe(efx); | |
1565 | if (rc) | |
1566 | return rc; | |
1567 | ||
1568 | #ifdef CONFIG_RFS_ACCEL | |
1569 | if (efx->type->offload_features & NETIF_F_NTUPLE) { | |
1570 | efx->rps_flow_id = kcalloc(efx->type->max_rx_ip_filters, | |
1571 | sizeof(*efx->rps_flow_id), | |
1572 | GFP_KERNEL); | |
1573 | if (!efx->rps_flow_id) { | |
1574 | efx->type->filter_table_remove(efx); | |
1575 | return -ENOMEM; | |
1576 | } | |
1577 | } | |
1578 | #endif | |
1579 | ||
1580 | return 0; | |
1581 | } | |
1582 | ||
1583 | static void efx_remove_filters(struct efx_nic *efx) | |
1584 | { | |
1585 | #ifdef CONFIG_RFS_ACCEL | |
1586 | kfree(efx->rps_flow_id); | |
1587 | #endif | |
1588 | efx->type->filter_table_remove(efx); | |
1589 | } | |
1590 | ||
1591 | static void efx_restore_filters(struct efx_nic *efx) | |
1592 | { | |
1593 | efx->type->filter_table_restore(efx); | |
1594 | } | |
1595 | ||
8ceee660 BH |
1596 | /************************************************************************** |
1597 | * | |
1598 | * NIC startup/shutdown | |
1599 | * | |
1600 | *************************************************************************/ | |
1601 | ||
1602 | static int efx_probe_all(struct efx_nic *efx) | |
1603 | { | |
8ceee660 BH |
1604 | int rc; |
1605 | ||
8ceee660 BH |
1606 | rc = efx_probe_nic(efx); |
1607 | if (rc) { | |
62776d03 | 1608 | netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); |
8ceee660 BH |
1609 | goto fail1; |
1610 | } | |
1611 | ||
8ceee660 BH |
1612 | rc = efx_probe_port(efx); |
1613 | if (rc) { | |
62776d03 | 1614 | netif_err(efx, probe, efx->net_dev, "failed to create port\n"); |
8ceee660 BH |
1615 | goto fail2; |
1616 | } | |
1617 | ||
7e6d06f0 BH |
1618 | BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); |
1619 | if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { | |
1620 | rc = -EINVAL; | |
1621 | goto fail3; | |
1622 | } | |
ecc910f5 | 1623 | efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; |
8ceee660 | 1624 | |
64eebcfd BH |
1625 | rc = efx_probe_filters(efx); |
1626 | if (rc) { | |
1627 | netif_err(efx, probe, efx->net_dev, | |
1628 | "failed to create filter tables\n"); | |
7f967c01 | 1629 | goto fail3; |
64eebcfd BH |
1630 | } |
1631 | ||
7f967c01 BH |
1632 | rc = efx_probe_channels(efx); |
1633 | if (rc) | |
1634 | goto fail4; | |
1635 | ||
8ceee660 BH |
1636 | return 0; |
1637 | ||
64eebcfd | 1638 | fail4: |
7f967c01 | 1639 | efx_remove_filters(efx); |
8ceee660 | 1640 | fail3: |
8ceee660 BH |
1641 | efx_remove_port(efx); |
1642 | fail2: | |
1643 | efx_remove_nic(efx); | |
1644 | fail1: | |
1645 | return rc; | |
1646 | } | |
1647 | ||
8b7325b4 BH |
1648 | /* If the interface is supposed to be running but is not, start |
1649 | * the hardware and software data path, regular activity for the port | |
1650 | * (MAC statistics, link polling, etc.) and schedule the port to be | |
1651 | * reconfigured. Interrupts must already be enabled. This function | |
1652 | * is safe to call multiple times, so long as the NIC is not disabled. | |
1653 | * Requires the RTNL lock. | |
9f2cb71c | 1654 | */ |
8ceee660 BH |
1655 | static void efx_start_all(struct efx_nic *efx) |
1656 | { | |
8ceee660 | 1657 | EFX_ASSERT_RESET_SERIALISED(efx); |
8b7325b4 | 1658 | BUG_ON(efx->state == STATE_DISABLED); |
8ceee660 BH |
1659 | |
1660 | /* Check that it is appropriate to restart the interface. All | |
1661 | * of these flags are safe to read under just the rtnl lock */ | |
8b7325b4 | 1662 | if (efx->port_enabled || !netif_running(efx->net_dev)) |
8ceee660 BH |
1663 | return; |
1664 | ||
8ceee660 | 1665 | efx_start_port(efx); |
9f2cb71c | 1666 | efx_start_datapath(efx); |
8880f4ec | 1667 | |
626950db AR |
1668 | /* Start the hardware monitor if there is one */ |
1669 | if (efx->type->monitor != NULL) | |
8ceee660 BH |
1670 | queue_delayed_work(efx->workqueue, &efx->monitor_work, |
1671 | efx_monitor_interval); | |
626950db AR |
1672 | |
1673 | /* If link state detection is normally event-driven, we have | |
1674 | * to poll now because we could have missed a change | |
1675 | */ | |
1676 | if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) { | |
78c1f0a0 SH |
1677 | mutex_lock(&efx->mac_lock); |
1678 | if (efx->phy_op->poll(efx)) | |
1679 | efx_link_status_changed(efx); | |
1680 | mutex_unlock(&efx->mac_lock); | |
1681 | } | |
55edc6e6 | 1682 | |
ef2b90ee | 1683 | efx->type->start_stats(efx); |
8ceee660 BH |
1684 | } |
1685 | ||
1686 | /* Flush all delayed work. Should only be called when no more delayed work | |
1687 | * will be scheduled. This doesn't flush pending online resets (efx_reset), | |
1688 | * since we're holding the rtnl_lock at this point. */ | |
1689 | static void efx_flush_all(struct efx_nic *efx) | |
1690 | { | |
dd40781e | 1691 | /* Make sure the hardware monitor and event self-test are stopped */ |
8ceee660 | 1692 | cancel_delayed_work_sync(&efx->monitor_work); |
dd40781e | 1693 | efx_selftest_async_cancel(efx); |
8ceee660 | 1694 | /* Stop scheduled port reconfigurations */ |
766ca0fa | 1695 | cancel_work_sync(&efx->mac_work); |
8ceee660 BH |
1696 | } |
1697 | ||
8b7325b4 BH |
1698 | /* Quiesce the hardware and software data path, and regular activity |
1699 | * for the port without bringing the link down. Safe to call multiple | |
1700 | * times with the NIC in almost any state, but interrupts should be | |
1701 | * enabled. Requires the RTNL lock. | |
1702 | */ | |
8ceee660 BH |
1703 | static void efx_stop_all(struct efx_nic *efx) |
1704 | { | |
8ceee660 BH |
1705 | EFX_ASSERT_RESET_SERIALISED(efx); |
1706 | ||
1707 | /* port_enabled can be read safely under the rtnl lock */ | |
1708 | if (!efx->port_enabled) | |
1709 | return; | |
1710 | ||
ef2b90ee | 1711 | efx->type->stop_stats(efx); |
8ceee660 BH |
1712 | efx_stop_port(efx); |
1713 | ||
fdaa9aed | 1714 | /* Flush efx_mac_work(), refill_workqueue, monitor_work */ |
8ceee660 BH |
1715 | efx_flush_all(efx); |
1716 | ||
29c69a48 BH |
1717 | /* Stop the kernel transmit interface. This is only valid if |
1718 | * the device is stopped or detached; otherwise the watchdog | |
1719 | * may fire immediately. | |
1720 | */ | |
1721 | WARN_ON(netif_running(efx->net_dev) && | |
1722 | netif_device_present(efx->net_dev)); | |
9f2cb71c BH |
1723 | netif_tx_disable(efx->net_dev); |
1724 | ||
1725 | efx_stop_datapath(efx); | |
8ceee660 BH |
1726 | } |
1727 | ||
1728 | static void efx_remove_all(struct efx_nic *efx) | |
1729 | { | |
4642610c | 1730 | efx_remove_channels(efx); |
7f967c01 | 1731 | efx_remove_filters(efx); |
8ceee660 BH |
1732 | efx_remove_port(efx); |
1733 | efx_remove_nic(efx); | |
1734 | } | |
1735 | ||
8ceee660 BH |
1736 | /************************************************************************** |
1737 | * | |
1738 | * Interrupt moderation | |
1739 | * | |
1740 | **************************************************************************/ | |
1741 | ||
cc180b69 | 1742 | static unsigned int irq_mod_ticks(unsigned int usecs, unsigned int quantum_ns) |
0d86ebd8 | 1743 | { |
b548f976 BH |
1744 | if (usecs == 0) |
1745 | return 0; | |
cc180b69 | 1746 | if (usecs * 1000 < quantum_ns) |
0d86ebd8 | 1747 | return 1; /* never round down to 0 */ |
cc180b69 | 1748 | return usecs * 1000 / quantum_ns; |
0d86ebd8 BH |
1749 | } |
1750 | ||
8ceee660 | 1751 | /* Set interrupt moderation parameters */ |
9e393b30 BH |
1752 | int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, |
1753 | unsigned int rx_usecs, bool rx_adaptive, | |
1754 | bool rx_may_override_tx) | |
8ceee660 | 1755 | { |
f7d12cdc | 1756 | struct efx_channel *channel; |
cc180b69 BH |
1757 | unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max * |
1758 | efx->timer_quantum_ns, | |
1759 | 1000); | |
1760 | unsigned int tx_ticks; | |
1761 | unsigned int rx_ticks; | |
8ceee660 BH |
1762 | |
1763 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1764 | ||
cc180b69 | 1765 | if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max) |
9e393b30 BH |
1766 | return -EINVAL; |
1767 | ||
cc180b69 BH |
1768 | tx_ticks = irq_mod_ticks(tx_usecs, efx->timer_quantum_ns); |
1769 | rx_ticks = irq_mod_ticks(rx_usecs, efx->timer_quantum_ns); | |
1770 | ||
9e393b30 BH |
1771 | if (tx_ticks != rx_ticks && efx->tx_channel_offset == 0 && |
1772 | !rx_may_override_tx) { | |
1773 | netif_err(efx, drv, efx->net_dev, "Channels are shared. " | |
1774 | "RX and TX IRQ moderation must be equal\n"); | |
1775 | return -EINVAL; | |
1776 | } | |
1777 | ||
6fb70fd1 | 1778 | efx->irq_rx_adaptive = rx_adaptive; |
0d86ebd8 | 1779 | efx->irq_rx_moderation = rx_ticks; |
f7d12cdc | 1780 | efx_for_each_channel(channel, efx) { |
525da907 | 1781 | if (efx_channel_has_rx_queue(channel)) |
f7d12cdc | 1782 | channel->irq_moderation = rx_ticks; |
525da907 | 1783 | else if (efx_channel_has_tx_queues(channel)) |
f7d12cdc BH |
1784 | channel->irq_moderation = tx_ticks; |
1785 | } | |
9e393b30 BH |
1786 | |
1787 | return 0; | |
8ceee660 BH |
1788 | } |
1789 | ||
a0c4faf5 BH |
1790 | void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, |
1791 | unsigned int *rx_usecs, bool *rx_adaptive) | |
1792 | { | |
cc180b69 BH |
1793 | /* We must round up when converting ticks to microseconds |
1794 | * because we round down when converting the other way. | |
1795 | */ | |
1796 | ||
a0c4faf5 | 1797 | *rx_adaptive = efx->irq_rx_adaptive; |
cc180b69 BH |
1798 | *rx_usecs = DIV_ROUND_UP(efx->irq_rx_moderation * |
1799 | efx->timer_quantum_ns, | |
1800 | 1000); | |
a0c4faf5 BH |
1801 | |
1802 | /* If channels are shared between RX and TX, so is IRQ | |
1803 | * moderation. Otherwise, IRQ moderation is the same for all | |
1804 | * TX channels and is not adaptive. | |
1805 | */ | |
1806 | if (efx->tx_channel_offset == 0) | |
1807 | *tx_usecs = *rx_usecs; | |
1808 | else | |
cc180b69 | 1809 | *tx_usecs = DIV_ROUND_UP( |
a0c4faf5 | 1810 | efx->channel[efx->tx_channel_offset]->irq_moderation * |
cc180b69 BH |
1811 | efx->timer_quantum_ns, |
1812 | 1000); | |
a0c4faf5 BH |
1813 | } |
1814 | ||
8ceee660 BH |
1815 | /************************************************************************** |
1816 | * | |
1817 | * Hardware monitor | |
1818 | * | |
1819 | **************************************************************************/ | |
1820 | ||
e254c274 | 1821 | /* Run periodically off the general workqueue */ |
8ceee660 BH |
1822 | static void efx_monitor(struct work_struct *data) |
1823 | { | |
1824 | struct efx_nic *efx = container_of(data, struct efx_nic, | |
1825 | monitor_work.work); | |
8ceee660 | 1826 | |
62776d03 BH |
1827 | netif_vdbg(efx, timer, efx->net_dev, |
1828 | "hardware monitor executing on CPU %d\n", | |
1829 | raw_smp_processor_id()); | |
ef2b90ee | 1830 | BUG_ON(efx->type->monitor == NULL); |
8ceee660 | 1831 | |
8ceee660 BH |
1832 | /* If the mac_lock is already held then it is likely a port |
1833 | * reconfiguration is already in place, which will likely do | |
e254c274 BH |
1834 | * most of the work of monitor() anyway. */ |
1835 | if (mutex_trylock(&efx->mac_lock)) { | |
1836 | if (efx->port_enabled) | |
1837 | efx->type->monitor(efx); | |
1838 | mutex_unlock(&efx->mac_lock); | |
1839 | } | |
8ceee660 | 1840 | |
8ceee660 BH |
1841 | queue_delayed_work(efx->workqueue, &efx->monitor_work, |
1842 | efx_monitor_interval); | |
1843 | } | |
1844 | ||
1845 | /************************************************************************** | |
1846 | * | |
1847 | * ioctls | |
1848 | * | |
1849 | *************************************************************************/ | |
1850 | ||
1851 | /* Net device ioctl | |
1852 | * Context: process, rtnl_lock() held. | |
1853 | */ | |
1854 | static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) | |
1855 | { | |
767e468c | 1856 | struct efx_nic *efx = netdev_priv(net_dev); |
68e7f45e | 1857 | struct mii_ioctl_data *data = if_mii(ifr); |
8ceee660 | 1858 | |
7c236c43 SH |
1859 | if (cmd == SIOCSHWTSTAMP) |
1860 | return efx_ptp_ioctl(efx, ifr, cmd); | |
1861 | ||
68e7f45e BH |
1862 | /* Convert phy_id from older PRTAD/DEVAD format */ |
1863 | if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && | |
1864 | (data->phy_id & 0xfc00) == 0x0400) | |
1865 | data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; | |
1866 | ||
1867 | return mdio_mii_ioctl(&efx->mdio, data, cmd); | |
8ceee660 BH |
1868 | } |
1869 | ||
1870 | /************************************************************************** | |
1871 | * | |
1872 | * NAPI interface | |
1873 | * | |
1874 | **************************************************************************/ | |
1875 | ||
7f967c01 BH |
1876 | static void efx_init_napi_channel(struct efx_channel *channel) |
1877 | { | |
1878 | struct efx_nic *efx = channel->efx; | |
1879 | ||
1880 | channel->napi_dev = efx->net_dev; | |
1881 | netif_napi_add(channel->napi_dev, &channel->napi_str, | |
1882 | efx_poll, napi_weight); | |
1883 | } | |
1884 | ||
e8f14992 | 1885 | static void efx_init_napi(struct efx_nic *efx) |
8ceee660 BH |
1886 | { |
1887 | struct efx_channel *channel; | |
8ceee660 | 1888 | |
7f967c01 BH |
1889 | efx_for_each_channel(channel, efx) |
1890 | efx_init_napi_channel(channel); | |
e8f14992 BH |
1891 | } |
1892 | ||
1893 | static void efx_fini_napi_channel(struct efx_channel *channel) | |
1894 | { | |
1895 | if (channel->napi_dev) | |
1896 | netif_napi_del(&channel->napi_str); | |
1897 | channel->napi_dev = NULL; | |
8ceee660 BH |
1898 | } |
1899 | ||
1900 | static void efx_fini_napi(struct efx_nic *efx) | |
1901 | { | |
1902 | struct efx_channel *channel; | |
1903 | ||
e8f14992 BH |
1904 | efx_for_each_channel(channel, efx) |
1905 | efx_fini_napi_channel(channel); | |
8ceee660 BH |
1906 | } |
1907 | ||
1908 | /************************************************************************** | |
1909 | * | |
1910 | * Kernel netpoll interface | |
1911 | * | |
1912 | *************************************************************************/ | |
1913 | ||
1914 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1915 | ||
1916 | /* Although in the common case interrupts will be disabled, this is not | |
1917 | * guaranteed. However, all our work happens inside the NAPI callback, | |
1918 | * so no locking is required. | |
1919 | */ | |
1920 | static void efx_netpoll(struct net_device *net_dev) | |
1921 | { | |
767e468c | 1922 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
1923 | struct efx_channel *channel; |
1924 | ||
64ee3120 | 1925 | efx_for_each_channel(channel, efx) |
8ceee660 BH |
1926 | efx_schedule_channel(channel); |
1927 | } | |
1928 | ||
1929 | #endif | |
1930 | ||
1931 | /************************************************************************** | |
1932 | * | |
1933 | * Kernel net device interface | |
1934 | * | |
1935 | *************************************************************************/ | |
1936 | ||
1937 | /* Context: process, rtnl_lock() held. */ | |
1938 | static int efx_net_open(struct net_device *net_dev) | |
1939 | { | |
767e468c | 1940 | struct efx_nic *efx = netdev_priv(net_dev); |
8b7325b4 BH |
1941 | int rc; |
1942 | ||
62776d03 BH |
1943 | netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", |
1944 | raw_smp_processor_id()); | |
8ceee660 | 1945 | |
8b7325b4 BH |
1946 | rc = efx_check_disabled(efx); |
1947 | if (rc) | |
1948 | return rc; | |
f8b87c17 BH |
1949 | if (efx->phy_mode & PHY_MODE_SPECIAL) |
1950 | return -EBUSY; | |
8880f4ec BH |
1951 | if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) |
1952 | return -EIO; | |
f8b87c17 | 1953 | |
78c1f0a0 SH |
1954 | /* Notify the kernel of the link state polled during driver load, |
1955 | * before the monitor starts running */ | |
1956 | efx_link_status_changed(efx); | |
1957 | ||
8ceee660 | 1958 | efx_start_all(efx); |
dd40781e | 1959 | efx_selftest_async_start(efx); |
8ceee660 BH |
1960 | return 0; |
1961 | } | |
1962 | ||
1963 | /* Context: process, rtnl_lock() held. | |
1964 | * Note that the kernel will ignore our return code; this method | |
1965 | * should really be a void. | |
1966 | */ | |
1967 | static int efx_net_stop(struct net_device *net_dev) | |
1968 | { | |
767e468c | 1969 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 | 1970 | |
62776d03 BH |
1971 | netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", |
1972 | raw_smp_processor_id()); | |
8ceee660 | 1973 | |
8b7325b4 BH |
1974 | /* Stop the device and flush all the channels */ |
1975 | efx_stop_all(efx); | |
8ceee660 BH |
1976 | |
1977 | return 0; | |
1978 | } | |
1979 | ||
5b9e207c | 1980 | /* Context: process, dev_base_lock or RTNL held, non-blocking. */ |
2aa9ef11 BH |
1981 | static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev, |
1982 | struct rtnl_link_stats64 *stats) | |
8ceee660 | 1983 | { |
767e468c | 1984 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 | 1985 | |
55edc6e6 | 1986 | spin_lock_bh(&efx->stats_lock); |
cd0ecc9a | 1987 | efx->type->update_stats(efx, NULL, stats); |
1cb34522 BH |
1988 | spin_unlock_bh(&efx->stats_lock); |
1989 | ||
8ceee660 BH |
1990 | return stats; |
1991 | } | |
1992 | ||
1993 | /* Context: netif_tx_lock held, BHs disabled. */ | |
1994 | static void efx_watchdog(struct net_device *net_dev) | |
1995 | { | |
767e468c | 1996 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 | 1997 | |
62776d03 BH |
1998 | netif_err(efx, tx_err, efx->net_dev, |
1999 | "TX stuck with port_enabled=%d: resetting channels\n", | |
2000 | efx->port_enabled); | |
8ceee660 | 2001 | |
739bb23d | 2002 | efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); |
8ceee660 BH |
2003 | } |
2004 | ||
2005 | ||
2006 | /* Context: process, rtnl_lock() held. */ | |
2007 | static int efx_change_mtu(struct net_device *net_dev, int new_mtu) | |
2008 | { | |
767e468c | 2009 | struct efx_nic *efx = netdev_priv(net_dev); |
8b7325b4 | 2010 | int rc; |
8ceee660 | 2011 | |
8b7325b4 BH |
2012 | rc = efx_check_disabled(efx); |
2013 | if (rc) | |
2014 | return rc; | |
8ceee660 BH |
2015 | if (new_mtu > EFX_MAX_MTU) |
2016 | return -EINVAL; | |
2017 | ||
62776d03 | 2018 | netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); |
8ceee660 | 2019 | |
29c69a48 BH |
2020 | efx_device_detach_sync(efx); |
2021 | efx_stop_all(efx); | |
2022 | ||
d3245b28 | 2023 | mutex_lock(&efx->mac_lock); |
8ceee660 | 2024 | net_dev->mtu = new_mtu; |
710b208d | 2025 | efx->type->reconfigure_mac(efx); |
d3245b28 BH |
2026 | mutex_unlock(&efx->mac_lock); |
2027 | ||
8ceee660 | 2028 | efx_start_all(efx); |
29c69a48 | 2029 | netif_device_attach(efx->net_dev); |
6c8eef4a | 2030 | return 0; |
8ceee660 BH |
2031 | } |
2032 | ||
2033 | static int efx_set_mac_address(struct net_device *net_dev, void *data) | |
2034 | { | |
767e468c | 2035 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
2036 | struct sockaddr *addr = data; |
2037 | char *new_addr = addr->sa_data; | |
2038 | ||
8ceee660 | 2039 | if (!is_valid_ether_addr(new_addr)) { |
62776d03 BH |
2040 | netif_err(efx, drv, efx->net_dev, |
2041 | "invalid ethernet MAC address requested: %pM\n", | |
2042 | new_addr); | |
504f9b5a | 2043 | return -EADDRNOTAVAIL; |
8ceee660 BH |
2044 | } |
2045 | ||
2046 | memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len); | |
cd2d5b52 | 2047 | efx_sriov_mac_address_changed(efx); |
8ceee660 BH |
2048 | |
2049 | /* Reconfigure the MAC */ | |
d3245b28 | 2050 | mutex_lock(&efx->mac_lock); |
710b208d | 2051 | efx->type->reconfigure_mac(efx); |
d3245b28 | 2052 | mutex_unlock(&efx->mac_lock); |
8ceee660 BH |
2053 | |
2054 | return 0; | |
2055 | } | |
2056 | ||
a816f75a | 2057 | /* Context: netif_addr_lock held, BHs disabled. */ |
0fca8c97 | 2058 | static void efx_set_rx_mode(struct net_device *net_dev) |
8ceee660 | 2059 | { |
767e468c | 2060 | struct efx_nic *efx = netdev_priv(net_dev); |
a816f75a | 2061 | |
8be4f3e6 BH |
2062 | if (efx->port_enabled) |
2063 | queue_work(efx->workqueue, &efx->mac_work); | |
2064 | /* Otherwise efx_start_port() will do this */ | |
8ceee660 BH |
2065 | } |
2066 | ||
c8f44aff | 2067 | static int efx_set_features(struct net_device *net_dev, netdev_features_t data) |
abfe9039 BH |
2068 | { |
2069 | struct efx_nic *efx = netdev_priv(net_dev); | |
2070 | ||
2071 | /* If disabling RX n-tuple filtering, clear existing filters */ | |
2072 | if (net_dev->features & ~data & NETIF_F_NTUPLE) | |
2073 | efx_filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); | |
2074 | ||
2075 | return 0; | |
2076 | } | |
2077 | ||
8127d661 | 2078 | static const struct net_device_ops efx_farch_netdev_ops = { |
c3ecb9f3 SH |
2079 | .ndo_open = efx_net_open, |
2080 | .ndo_stop = efx_net_stop, | |
4472702e | 2081 | .ndo_get_stats64 = efx_net_stats, |
c3ecb9f3 SH |
2082 | .ndo_tx_timeout = efx_watchdog, |
2083 | .ndo_start_xmit = efx_hard_start_xmit, | |
2084 | .ndo_validate_addr = eth_validate_addr, | |
2085 | .ndo_do_ioctl = efx_ioctl, | |
2086 | .ndo_change_mtu = efx_change_mtu, | |
2087 | .ndo_set_mac_address = efx_set_mac_address, | |
0fca8c97 | 2088 | .ndo_set_rx_mode = efx_set_rx_mode, |
abfe9039 | 2089 | .ndo_set_features = efx_set_features, |
cd2d5b52 BH |
2090 | #ifdef CONFIG_SFC_SRIOV |
2091 | .ndo_set_vf_mac = efx_sriov_set_vf_mac, | |
2092 | .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, | |
2093 | .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, | |
2094 | .ndo_get_vf_config = efx_sriov_get_vf_config, | |
2095 | #endif | |
c3ecb9f3 SH |
2096 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2097 | .ndo_poll_controller = efx_netpoll, | |
2098 | #endif | |
94b274bf | 2099 | .ndo_setup_tc = efx_setup_tc, |
64d8ad6d BH |
2100 | #ifdef CONFIG_RFS_ACCEL |
2101 | .ndo_rx_flow_steer = efx_filter_rfs, | |
2102 | #endif | |
c3ecb9f3 SH |
2103 | }; |
2104 | ||
8127d661 BH |
2105 | static const struct net_device_ops efx_ef10_netdev_ops = { |
2106 | .ndo_open = efx_net_open, | |
2107 | .ndo_stop = efx_net_stop, | |
2108 | .ndo_get_stats64 = efx_net_stats, | |
2109 | .ndo_tx_timeout = efx_watchdog, | |
2110 | .ndo_start_xmit = efx_hard_start_xmit, | |
2111 | .ndo_validate_addr = eth_validate_addr, | |
2112 | .ndo_do_ioctl = efx_ioctl, | |
2113 | .ndo_change_mtu = efx_change_mtu, | |
2114 | .ndo_set_mac_address = efx_set_mac_address, | |
2115 | .ndo_set_rx_mode = efx_set_rx_mode, | |
2116 | .ndo_set_features = efx_set_features, | |
2117 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2118 | .ndo_poll_controller = efx_netpoll, | |
2119 | #endif | |
2120 | #ifdef CONFIG_RFS_ACCEL | |
2121 | .ndo_rx_flow_steer = efx_filter_rfs, | |
2122 | #endif | |
2123 | }; | |
2124 | ||
7dde596e BH |
2125 | static void efx_update_name(struct efx_nic *efx) |
2126 | { | |
2127 | strcpy(efx->name, efx->net_dev->name); | |
2128 | efx_mtd_rename(efx); | |
2129 | efx_set_channel_names(efx); | |
2130 | } | |
2131 | ||
8ceee660 BH |
2132 | static int efx_netdev_event(struct notifier_block *this, |
2133 | unsigned long event, void *ptr) | |
2134 | { | |
351638e7 | 2135 | struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); |
8ceee660 | 2136 | |
8127d661 BH |
2137 | if ((net_dev->netdev_ops == &efx_farch_netdev_ops || |
2138 | net_dev->netdev_ops == &efx_ef10_netdev_ops) && | |
7dde596e BH |
2139 | event == NETDEV_CHANGENAME) |
2140 | efx_update_name(netdev_priv(net_dev)); | |
8ceee660 BH |
2141 | |
2142 | return NOTIFY_DONE; | |
2143 | } | |
2144 | ||
2145 | static struct notifier_block efx_netdev_notifier = { | |
2146 | .notifier_call = efx_netdev_event, | |
2147 | }; | |
2148 | ||
06d5e193 BH |
2149 | static ssize_t |
2150 | show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) | |
2151 | { | |
2152 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
2153 | return sprintf(buf, "%d\n", efx->phy_type); | |
2154 | } | |
776fbcc9 | 2155 | static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL); |
06d5e193 | 2156 | |
8ceee660 BH |
2157 | static int efx_register_netdev(struct efx_nic *efx) |
2158 | { | |
2159 | struct net_device *net_dev = efx->net_dev; | |
c04bfc6b | 2160 | struct efx_channel *channel; |
8ceee660 BH |
2161 | int rc; |
2162 | ||
2163 | net_dev->watchdog_timeo = 5 * HZ; | |
2164 | net_dev->irq = efx->pci_dev->irq; | |
8127d661 BH |
2165 | if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) { |
2166 | net_dev->netdev_ops = &efx_ef10_netdev_ops; | |
2167 | net_dev->priv_flags |= IFF_UNICAST_FLT; | |
2168 | } else { | |
2169 | net_dev->netdev_ops = &efx_farch_netdev_ops; | |
2170 | } | |
8ceee660 | 2171 | SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops); |
7e6d06f0 | 2172 | net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; |
8ceee660 | 2173 | |
7dde596e | 2174 | rtnl_lock(); |
aed0628d | 2175 | |
7153f623 BH |
2176 | /* Enable resets to be scheduled and check whether any were |
2177 | * already requested. If so, the NIC is probably hosed so we | |
2178 | * abort. | |
2179 | */ | |
2180 | efx->state = STATE_READY; | |
2181 | smp_mb(); /* ensure we change state before checking reset_pending */ | |
2182 | if (efx->reset_pending) { | |
2183 | netif_err(efx, probe, efx->net_dev, | |
2184 | "aborting probe due to scheduled reset\n"); | |
2185 | rc = -EIO; | |
2186 | goto fail_locked; | |
2187 | } | |
2188 | ||
aed0628d BH |
2189 | rc = dev_alloc_name(net_dev, net_dev->name); |
2190 | if (rc < 0) | |
2191 | goto fail_locked; | |
7dde596e | 2192 | efx_update_name(efx); |
aed0628d | 2193 | |
8f8b3d51 BH |
2194 | /* Always start with carrier off; PHY events will detect the link */ |
2195 | netif_carrier_off(net_dev); | |
2196 | ||
aed0628d BH |
2197 | rc = register_netdevice(net_dev); |
2198 | if (rc) | |
2199 | goto fail_locked; | |
2200 | ||
c04bfc6b BH |
2201 | efx_for_each_channel(channel, efx) { |
2202 | struct efx_tx_queue *tx_queue; | |
60031fcc BH |
2203 | efx_for_each_channel_tx_queue(tx_queue, channel) |
2204 | efx_init_tx_queue_core_txq(tx_queue); | |
c04bfc6b BH |
2205 | } |
2206 | ||
7dde596e | 2207 | rtnl_unlock(); |
8ceee660 | 2208 | |
06d5e193 BH |
2209 | rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); |
2210 | if (rc) { | |
62776d03 BH |
2211 | netif_err(efx, drv, efx->net_dev, |
2212 | "failed to init net dev attributes\n"); | |
06d5e193 BH |
2213 | goto fail_registered; |
2214 | } | |
2215 | ||
8ceee660 | 2216 | return 0; |
06d5e193 | 2217 | |
7153f623 BH |
2218 | fail_registered: |
2219 | rtnl_lock(); | |
2220 | unregister_netdevice(net_dev); | |
aed0628d | 2221 | fail_locked: |
7153f623 | 2222 | efx->state = STATE_UNINIT; |
aed0628d | 2223 | rtnl_unlock(); |
62776d03 | 2224 | netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); |
aed0628d | 2225 | return rc; |
8ceee660 BH |
2226 | } |
2227 | ||
2228 | static void efx_unregister_netdev(struct efx_nic *efx) | |
2229 | { | |
8ceee660 BH |
2230 | if (!efx->net_dev) |
2231 | return; | |
2232 | ||
767e468c | 2233 | BUG_ON(netdev_priv(efx->net_dev) != efx); |
8ceee660 | 2234 | |
73ba7b68 BH |
2235 | strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); |
2236 | device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); | |
7153f623 BH |
2237 | |
2238 | rtnl_lock(); | |
2239 | unregister_netdevice(efx->net_dev); | |
2240 | efx->state = STATE_UNINIT; | |
2241 | rtnl_unlock(); | |
8ceee660 BH |
2242 | } |
2243 | ||
2244 | /************************************************************************** | |
2245 | * | |
2246 | * Device reset and suspend | |
2247 | * | |
2248 | **************************************************************************/ | |
2249 | ||
2467ca46 BH |
2250 | /* Tears down the entire software state and most of the hardware state |
2251 | * before reset. */ | |
d3245b28 | 2252 | void efx_reset_down(struct efx_nic *efx, enum reset_type method) |
8ceee660 | 2253 | { |
8ceee660 BH |
2254 | EFX_ASSERT_RESET_SERIALISED(efx); |
2255 | ||
2467ca46 | 2256 | efx_stop_all(efx); |
d8291187 | 2257 | efx_disable_interrupts(efx); |
5642ceef BH |
2258 | |
2259 | mutex_lock(&efx->mac_lock); | |
4b988280 SH |
2260 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) |
2261 | efx->phy_op->fini(efx); | |
ef2b90ee | 2262 | efx->type->fini(efx); |
8ceee660 BH |
2263 | } |
2264 | ||
2467ca46 BH |
2265 | /* This function will always ensure that the locks acquired in |
2266 | * efx_reset_down() are released. A failure return code indicates | |
2267 | * that we were unable to reinitialise the hardware, and the | |
2268 | * driver should be disabled. If ok is false, then the rx and tx | |
2269 | * engines are not restarted, pending a RESET_DISABLE. */ | |
d3245b28 | 2270 | int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) |
8ceee660 BH |
2271 | { |
2272 | int rc; | |
2273 | ||
2467ca46 | 2274 | EFX_ASSERT_RESET_SERIALISED(efx); |
8ceee660 | 2275 | |
ef2b90ee | 2276 | rc = efx->type->init(efx); |
8ceee660 | 2277 | if (rc) { |
62776d03 | 2278 | netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); |
eb9f6744 | 2279 | goto fail; |
8ceee660 BH |
2280 | } |
2281 | ||
eb9f6744 BH |
2282 | if (!ok) |
2283 | goto fail; | |
2284 | ||
4b988280 | 2285 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { |
eb9f6744 BH |
2286 | rc = efx->phy_op->init(efx); |
2287 | if (rc) | |
2288 | goto fail; | |
2289 | if (efx->phy_op->reconfigure(efx)) | |
62776d03 BH |
2290 | netif_err(efx, drv, efx->net_dev, |
2291 | "could not restore PHY settings\n"); | |
4b988280 SH |
2292 | } |
2293 | ||
261e4d96 JC |
2294 | rc = efx_enable_interrupts(efx); |
2295 | if (rc) | |
2296 | goto fail; | |
64eebcfd | 2297 | efx_restore_filters(efx); |
cd2d5b52 | 2298 | efx_sriov_reset(efx); |
eb9f6744 | 2299 | |
eb9f6744 BH |
2300 | mutex_unlock(&efx->mac_lock); |
2301 | ||
2302 | efx_start_all(efx); | |
2303 | ||
2304 | return 0; | |
2305 | ||
2306 | fail: | |
2307 | efx->port_initialized = false; | |
2467ca46 BH |
2308 | |
2309 | mutex_unlock(&efx->mac_lock); | |
2310 | ||
8ceee660 BH |
2311 | return rc; |
2312 | } | |
2313 | ||
eb9f6744 BH |
2314 | /* Reset the NIC using the specified method. Note that the reset may |
2315 | * fail, in which case the card will be left in an unusable state. | |
8ceee660 | 2316 | * |
eb9f6744 | 2317 | * Caller must hold the rtnl_lock. |
8ceee660 | 2318 | */ |
eb9f6744 | 2319 | int efx_reset(struct efx_nic *efx, enum reset_type method) |
8ceee660 | 2320 | { |
eb9f6744 BH |
2321 | int rc, rc2; |
2322 | bool disabled; | |
8ceee660 | 2323 | |
62776d03 BH |
2324 | netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", |
2325 | RESET_TYPE(method)); | |
8ceee660 | 2326 | |
c2f3b8e3 | 2327 | efx_device_detach_sync(efx); |
d3245b28 | 2328 | efx_reset_down(efx, method); |
8ceee660 | 2329 | |
ef2b90ee | 2330 | rc = efx->type->reset(efx, method); |
8ceee660 | 2331 | if (rc) { |
62776d03 | 2332 | netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); |
eb9f6744 | 2333 | goto out; |
8ceee660 BH |
2334 | } |
2335 | ||
a7d529ae BH |
2336 | /* Clear flags for the scopes we covered. We assume the NIC and |
2337 | * driver are now quiescent so that there is no race here. | |
2338 | */ | |
2339 | efx->reset_pending &= -(1 << (method + 1)); | |
8ceee660 BH |
2340 | |
2341 | /* Reinitialise bus-mastering, which may have been turned off before | |
2342 | * the reset was scheduled. This is still appropriate, even in the | |
2343 | * RESET_TYPE_DISABLE since this driver generally assumes the hardware | |
2344 | * can respond to requests. */ | |
2345 | pci_set_master(efx->pci_dev); | |
2346 | ||
eb9f6744 | 2347 | out: |
8ceee660 | 2348 | /* Leave device stopped if necessary */ |
626950db AR |
2349 | disabled = rc || |
2350 | method == RESET_TYPE_DISABLE || | |
2351 | method == RESET_TYPE_RECOVER_OR_DISABLE; | |
eb9f6744 BH |
2352 | rc2 = efx_reset_up(efx, method, !disabled); |
2353 | if (rc2) { | |
2354 | disabled = true; | |
2355 | if (!rc) | |
2356 | rc = rc2; | |
8ceee660 BH |
2357 | } |
2358 | ||
eb9f6744 | 2359 | if (disabled) { |
f49a4589 | 2360 | dev_close(efx->net_dev); |
62776d03 | 2361 | netif_err(efx, drv, efx->net_dev, "has been disabled\n"); |
f4bd954e | 2362 | efx->state = STATE_DISABLED; |
f4bd954e | 2363 | } else { |
62776d03 | 2364 | netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); |
e4abce85 | 2365 | netif_device_attach(efx->net_dev); |
f4bd954e | 2366 | } |
8ceee660 BH |
2367 | return rc; |
2368 | } | |
2369 | ||
626950db AR |
2370 | /* Try recovery mechanisms. |
2371 | * For now only EEH is supported. | |
2372 | * Returns 0 if the recovery mechanisms are unsuccessful. | |
2373 | * Returns a non-zero value otherwise. | |
2374 | */ | |
b28405b0 | 2375 | int efx_try_recovery(struct efx_nic *efx) |
626950db AR |
2376 | { |
2377 | #ifdef CONFIG_EEH | |
2378 | /* A PCI error can occur and not be seen by EEH because nothing | |
2379 | * happens on the PCI bus. In this case the driver may fail and | |
2380 | * schedule a 'recover or reset', leading to this recovery handler. | |
2381 | * Manually call the eeh failure check function. | |
2382 | */ | |
2383 | struct eeh_dev *eehdev = | |
2384 | of_node_to_eeh_dev(pci_device_to_OF_node(efx->pci_dev)); | |
2385 | ||
2386 | if (eeh_dev_check_failure(eehdev)) { | |
2387 | /* The EEH mechanisms will handle the error and reset the | |
2388 | * device if necessary. | |
2389 | */ | |
2390 | return 1; | |
2391 | } | |
2392 | #endif | |
2393 | return 0; | |
2394 | } | |
2395 | ||
8ceee660 BH |
2396 | /* The worker thread exists so that code that cannot sleep can |
2397 | * schedule a reset for later. | |
2398 | */ | |
2399 | static void efx_reset_work(struct work_struct *data) | |
2400 | { | |
eb9f6744 | 2401 | struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); |
626950db AR |
2402 | unsigned long pending; |
2403 | enum reset_type method; | |
2404 | ||
2405 | pending = ACCESS_ONCE(efx->reset_pending); | |
2406 | method = fls(pending) - 1; | |
2407 | ||
2408 | if ((method == RESET_TYPE_RECOVER_OR_DISABLE || | |
2409 | method == RESET_TYPE_RECOVER_OR_ALL) && | |
2410 | efx_try_recovery(efx)) | |
2411 | return; | |
8ceee660 | 2412 | |
a7d529ae | 2413 | if (!pending) |
319ba649 SH |
2414 | return; |
2415 | ||
eb9f6744 | 2416 | rtnl_lock(); |
7153f623 BH |
2417 | |
2418 | /* We checked the state in efx_schedule_reset() but it may | |
2419 | * have changed by now. Now that we have the RTNL lock, | |
2420 | * it cannot change again. | |
2421 | */ | |
2422 | if (efx->state == STATE_READY) | |
626950db | 2423 | (void)efx_reset(efx, method); |
7153f623 | 2424 | |
eb9f6744 | 2425 | rtnl_unlock(); |
8ceee660 BH |
2426 | } |
2427 | ||
2428 | void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) | |
2429 | { | |
2430 | enum reset_type method; | |
2431 | ||
626950db AR |
2432 | if (efx->state == STATE_RECOVERY) { |
2433 | netif_dbg(efx, drv, efx->net_dev, | |
2434 | "recovering: skip scheduling %s reset\n", | |
2435 | RESET_TYPE(type)); | |
2436 | return; | |
2437 | } | |
2438 | ||
8ceee660 BH |
2439 | switch (type) { |
2440 | case RESET_TYPE_INVISIBLE: | |
2441 | case RESET_TYPE_ALL: | |
626950db | 2442 | case RESET_TYPE_RECOVER_OR_ALL: |
8ceee660 BH |
2443 | case RESET_TYPE_WORLD: |
2444 | case RESET_TYPE_DISABLE: | |
626950db | 2445 | case RESET_TYPE_RECOVER_OR_DISABLE: |
8ceee660 | 2446 | method = type; |
0e2a9c7c BH |
2447 | netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", |
2448 | RESET_TYPE(method)); | |
8ceee660 | 2449 | break; |
8ceee660 | 2450 | default: |
0e2a9c7c | 2451 | method = efx->type->map_reset_reason(type); |
62776d03 BH |
2452 | netif_dbg(efx, drv, efx->net_dev, |
2453 | "scheduling %s reset for %s\n", | |
2454 | RESET_TYPE(method), RESET_TYPE(type)); | |
0e2a9c7c BH |
2455 | break; |
2456 | } | |
8ceee660 | 2457 | |
a7d529ae | 2458 | set_bit(method, &efx->reset_pending); |
7153f623 BH |
2459 | smp_mb(); /* ensure we change reset_pending before checking state */ |
2460 | ||
2461 | /* If we're not READY then just leave the flags set as the cue | |
2462 | * to abort probing or reschedule the reset later. | |
2463 | */ | |
2464 | if (ACCESS_ONCE(efx->state) != STATE_READY) | |
2465 | return; | |
8ceee660 | 2466 | |
8880f4ec BH |
2467 | /* efx_process_channel() will no longer read events once a |
2468 | * reset is scheduled. So switch back to poll'd MCDI completions. */ | |
2469 | efx_mcdi_mode_poll(efx); | |
2470 | ||
1ab00629 | 2471 | queue_work(reset_workqueue, &efx->reset_work); |
8ceee660 BH |
2472 | } |
2473 | ||
2474 | /************************************************************************** | |
2475 | * | |
2476 | * List of NICs we support | |
2477 | * | |
2478 | **************************************************************************/ | |
2479 | ||
2480 | /* PCI device ID table */ | |
a3aa1884 | 2481 | static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = { |
937383a5 BH |
2482 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, |
2483 | PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0), | |
daeda630 | 2484 | .driver_data = (unsigned long) &falcon_a1_nic_type}, |
937383a5 BH |
2485 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, |
2486 | PCI_DEVICE_ID_SOLARFLARE_SFC4000B), | |
daeda630 | 2487 | .driver_data = (unsigned long) &falcon_b0_nic_type}, |
547c474f | 2488 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ |
8880f4ec | 2489 | .driver_data = (unsigned long) &siena_a0_nic_type}, |
547c474f | 2490 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ |
8880f4ec | 2491 | .driver_data = (unsigned long) &siena_a0_nic_type}, |
8127d661 BH |
2492 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */ |
2493 | .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, | |
8ceee660 BH |
2494 | {0} /* end of list */ |
2495 | }; | |
2496 | ||
2497 | /************************************************************************** | |
2498 | * | |
3759433d | 2499 | * Dummy PHY/MAC operations |
8ceee660 | 2500 | * |
01aad7b6 | 2501 | * Can be used for some unimplemented operations |
8ceee660 BH |
2502 | * Needed so all function pointers are valid and do not have to be tested |
2503 | * before use | |
2504 | * | |
2505 | **************************************************************************/ | |
2506 | int efx_port_dummy_op_int(struct efx_nic *efx) | |
2507 | { | |
2508 | return 0; | |
2509 | } | |
2510 | void efx_port_dummy_op_void(struct efx_nic *efx) {} | |
d215697f | 2511 | |
2512 | static bool efx_port_dummy_op_poll(struct efx_nic *efx) | |
fdaa9aed SH |
2513 | { |
2514 | return false; | |
2515 | } | |
8ceee660 | 2516 | |
6c8c2513 | 2517 | static const struct efx_phy_operations efx_dummy_phy_operations = { |
8ceee660 | 2518 | .init = efx_port_dummy_op_int, |
d3245b28 | 2519 | .reconfigure = efx_port_dummy_op_int, |
fdaa9aed | 2520 | .poll = efx_port_dummy_op_poll, |
8ceee660 | 2521 | .fini = efx_port_dummy_op_void, |
8ceee660 BH |
2522 | }; |
2523 | ||
8ceee660 BH |
2524 | /************************************************************************** |
2525 | * | |
2526 | * Data housekeeping | |
2527 | * | |
2528 | **************************************************************************/ | |
2529 | ||
2530 | /* This zeroes out and then fills in the invariants in a struct | |
2531 | * efx_nic (including all sub-structures). | |
2532 | */ | |
adeb15aa | 2533 | static int efx_init_struct(struct efx_nic *efx, |
8ceee660 BH |
2534 | struct pci_dev *pci_dev, struct net_device *net_dev) |
2535 | { | |
4642610c | 2536 | int i; |
8ceee660 BH |
2537 | |
2538 | /* Initialise common structures */ | |
8ceee660 | 2539 | spin_lock_init(&efx->biu_lock); |
76884835 BH |
2540 | #ifdef CONFIG_SFC_MTD |
2541 | INIT_LIST_HEAD(&efx->mtd_list); | |
2542 | #endif | |
8ceee660 BH |
2543 | INIT_WORK(&efx->reset_work, efx_reset_work); |
2544 | INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); | |
dd40781e | 2545 | INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); |
8ceee660 | 2546 | efx->pci_dev = pci_dev; |
62776d03 | 2547 | efx->msg_enable = debug; |
f16aeea0 | 2548 | efx->state = STATE_UNINIT; |
8ceee660 | 2549 | strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); |
8ceee660 BH |
2550 | |
2551 | efx->net_dev = net_dev; | |
43a3739d JC |
2552 | efx->rx_prefix_size = efx->type->rx_prefix_size; |
2553 | efx->rx_packet_hash_offset = | |
2554 | efx->type->rx_hash_offset - efx->type->rx_prefix_size; | |
8ceee660 BH |
2555 | spin_lock_init(&efx->stats_lock); |
2556 | mutex_init(&efx->mac_lock); | |
2557 | efx->phy_op = &efx_dummy_phy_operations; | |
68e7f45e | 2558 | efx->mdio.dev = net_dev; |
766ca0fa | 2559 | INIT_WORK(&efx->mac_work, efx_mac_work); |
9f2cb71c | 2560 | init_waitqueue_head(&efx->flush_wq); |
8ceee660 BH |
2561 | |
2562 | for (i = 0; i < EFX_MAX_CHANNELS; i++) { | |
4642610c BH |
2563 | efx->channel[i] = efx_alloc_channel(efx, i, NULL); |
2564 | if (!efx->channel[i]) | |
2565 | goto fail; | |
d8291187 BH |
2566 | efx->msi_context[i].efx = efx; |
2567 | efx->msi_context[i].index = i; | |
8ceee660 BH |
2568 | } |
2569 | ||
8ceee660 BH |
2570 | /* Higher numbered interrupt modes are less capable! */ |
2571 | efx->interrupt_mode = max(efx->type->max_interrupt_mode, | |
2572 | interrupt_mode); | |
2573 | ||
6977dc63 BH |
2574 | /* Would be good to use the net_dev name, but we're too early */ |
2575 | snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", | |
2576 | pci_name(pci_dev)); | |
2577 | efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); | |
1ab00629 | 2578 | if (!efx->workqueue) |
4642610c | 2579 | goto fail; |
8d9853d9 | 2580 | |
8ceee660 | 2581 | return 0; |
4642610c BH |
2582 | |
2583 | fail: | |
2584 | efx_fini_struct(efx); | |
2585 | return -ENOMEM; | |
8ceee660 BH |
2586 | } |
2587 | ||
2588 | static void efx_fini_struct(struct efx_nic *efx) | |
2589 | { | |
8313aca3 BH |
2590 | int i; |
2591 | ||
2592 | for (i = 0; i < EFX_MAX_CHANNELS; i++) | |
2593 | kfree(efx->channel[i]); | |
2594 | ||
8ceee660 BH |
2595 | if (efx->workqueue) { |
2596 | destroy_workqueue(efx->workqueue); | |
2597 | efx->workqueue = NULL; | |
2598 | } | |
2599 | } | |
2600 | ||
2601 | /************************************************************************** | |
2602 | * | |
2603 | * PCI interface | |
2604 | * | |
2605 | **************************************************************************/ | |
2606 | ||
2607 | /* Main body of final NIC shutdown code | |
2608 | * This is called only at module unload (or hotplug removal). | |
2609 | */ | |
2610 | static void efx_pci_remove_main(struct efx_nic *efx) | |
2611 | { | |
7153f623 BH |
2612 | /* Flush reset_work. It can no longer be scheduled since we |
2613 | * are not READY. | |
2614 | */ | |
2615 | BUG_ON(efx->state == STATE_READY); | |
2616 | cancel_work_sync(&efx->reset_work); | |
2617 | ||
d8291187 | 2618 | efx_disable_interrupts(efx); |
152b6a62 | 2619 | efx_nic_fini_interrupt(efx); |
8ceee660 | 2620 | efx_fini_port(efx); |
ef2b90ee | 2621 | efx->type->fini(efx); |
8ceee660 BH |
2622 | efx_fini_napi(efx); |
2623 | efx_remove_all(efx); | |
2624 | } | |
2625 | ||
2626 | /* Final NIC shutdown | |
2627 | * This is called only at module unload (or hotplug removal). | |
2628 | */ | |
2629 | static void efx_pci_remove(struct pci_dev *pci_dev) | |
2630 | { | |
2631 | struct efx_nic *efx; | |
2632 | ||
2633 | efx = pci_get_drvdata(pci_dev); | |
2634 | if (!efx) | |
2635 | return; | |
2636 | ||
2637 | /* Mark the NIC as fini, then stop the interface */ | |
2638 | rtnl_lock(); | |
8ceee660 | 2639 | dev_close(efx->net_dev); |
d8291187 | 2640 | efx_disable_interrupts(efx); |
8ceee660 BH |
2641 | rtnl_unlock(); |
2642 | ||
cd2d5b52 | 2643 | efx_sriov_fini(efx); |
8ceee660 BH |
2644 | efx_unregister_netdev(efx); |
2645 | ||
7dde596e BH |
2646 | efx_mtd_remove(efx); |
2647 | ||
8ceee660 BH |
2648 | efx_pci_remove_main(efx); |
2649 | ||
8ceee660 | 2650 | efx_fini_io(efx); |
62776d03 | 2651 | netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); |
8ceee660 | 2652 | |
8ceee660 | 2653 | efx_fini_struct(efx); |
3de4e301 | 2654 | pci_set_drvdata(pci_dev, NULL); |
8ceee660 | 2655 | free_netdev(efx->net_dev); |
626950db AR |
2656 | |
2657 | pci_disable_pcie_error_reporting(pci_dev); | |
8ceee660 BH |
2658 | }; |
2659 | ||
460eeaa0 BH |
2660 | /* NIC VPD information |
2661 | * Called during probe to display the part number of the | |
2662 | * installed NIC. VPD is potentially very large but this should | |
2663 | * always appear within the first 512 bytes. | |
2664 | */ | |
2665 | #define SFC_VPD_LEN 512 | |
2666 | static void efx_print_product_vpd(struct efx_nic *efx) | |
2667 | { | |
2668 | struct pci_dev *dev = efx->pci_dev; | |
2669 | char vpd_data[SFC_VPD_LEN]; | |
2670 | ssize_t vpd_size; | |
2671 | int i, j; | |
2672 | ||
2673 | /* Get the vpd data from the device */ | |
2674 | vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); | |
2675 | if (vpd_size <= 0) { | |
2676 | netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); | |
2677 | return; | |
2678 | } | |
2679 | ||
2680 | /* Get the Read only section */ | |
2681 | i = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); | |
2682 | if (i < 0) { | |
2683 | netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); | |
2684 | return; | |
2685 | } | |
2686 | ||
2687 | j = pci_vpd_lrdt_size(&vpd_data[i]); | |
2688 | i += PCI_VPD_LRDT_TAG_SIZE; | |
2689 | if (i + j > vpd_size) | |
2690 | j = vpd_size - i; | |
2691 | ||
2692 | /* Get the Part number */ | |
2693 | i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); | |
2694 | if (i < 0) { | |
2695 | netif_err(efx, drv, efx->net_dev, "Part number not found\n"); | |
2696 | return; | |
2697 | } | |
2698 | ||
2699 | j = pci_vpd_info_field_size(&vpd_data[i]); | |
2700 | i += PCI_VPD_INFO_FLD_HDR_SIZE; | |
2701 | if (i + j > vpd_size) { | |
2702 | netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); | |
2703 | return; | |
2704 | } | |
2705 | ||
2706 | netif_info(efx, drv, efx->net_dev, | |
2707 | "Part Number : %.*s\n", j, &vpd_data[i]); | |
2708 | } | |
2709 | ||
2710 | ||
8ceee660 BH |
2711 | /* Main body of NIC initialisation |
2712 | * This is called at module load (or hotplug insertion, theoretically). | |
2713 | */ | |
2714 | static int efx_pci_probe_main(struct efx_nic *efx) | |
2715 | { | |
2716 | int rc; | |
2717 | ||
2718 | /* Do start-of-day initialisation */ | |
2719 | rc = efx_probe_all(efx); | |
2720 | if (rc) | |
2721 | goto fail1; | |
2722 | ||
e8f14992 | 2723 | efx_init_napi(efx); |
8ceee660 | 2724 | |
ef2b90ee | 2725 | rc = efx->type->init(efx); |
8ceee660 | 2726 | if (rc) { |
62776d03 BH |
2727 | netif_err(efx, probe, efx->net_dev, |
2728 | "failed to initialise NIC\n"); | |
278c0621 | 2729 | goto fail3; |
8ceee660 BH |
2730 | } |
2731 | ||
2732 | rc = efx_init_port(efx); | |
2733 | if (rc) { | |
62776d03 BH |
2734 | netif_err(efx, probe, efx->net_dev, |
2735 | "failed to initialise port\n"); | |
278c0621 | 2736 | goto fail4; |
8ceee660 BH |
2737 | } |
2738 | ||
152b6a62 | 2739 | rc = efx_nic_init_interrupt(efx); |
8ceee660 | 2740 | if (rc) |
278c0621 | 2741 | goto fail5; |
261e4d96 JC |
2742 | rc = efx_enable_interrupts(efx); |
2743 | if (rc) | |
2744 | goto fail6; | |
8ceee660 BH |
2745 | |
2746 | return 0; | |
2747 | ||
261e4d96 JC |
2748 | fail6: |
2749 | efx_nic_fini_interrupt(efx); | |
278c0621 | 2750 | fail5: |
8ceee660 | 2751 | efx_fini_port(efx); |
8ceee660 | 2752 | fail4: |
ef2b90ee | 2753 | efx->type->fini(efx); |
8ceee660 BH |
2754 | fail3: |
2755 | efx_fini_napi(efx); | |
8ceee660 BH |
2756 | efx_remove_all(efx); |
2757 | fail1: | |
2758 | return rc; | |
2759 | } | |
2760 | ||
2761 | /* NIC initialisation | |
2762 | * | |
2763 | * This is called at module load (or hotplug insertion, | |
73ba7b68 | 2764 | * theoretically). It sets up PCI mappings, resets the NIC, |
8ceee660 BH |
2765 | * sets up and registers the network devices with the kernel and hooks |
2766 | * the interrupt service routine. It does not prepare the device for | |
2767 | * transmission; this is left to the first time one of the network | |
2768 | * interfaces is brought up (i.e. efx_net_open). | |
2769 | */ | |
87d1fc11 | 2770 | static int efx_pci_probe(struct pci_dev *pci_dev, |
1dd06ae8 | 2771 | const struct pci_device_id *entry) |
8ceee660 | 2772 | { |
8ceee660 BH |
2773 | struct net_device *net_dev; |
2774 | struct efx_nic *efx; | |
fadac6aa | 2775 | int rc; |
8ceee660 BH |
2776 | |
2777 | /* Allocate and initialise a struct net_device and struct efx_nic */ | |
94b274bf BH |
2778 | net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, |
2779 | EFX_MAX_RX_QUEUES); | |
8ceee660 BH |
2780 | if (!net_dev) |
2781 | return -ENOMEM; | |
adeb15aa BH |
2782 | efx = netdev_priv(net_dev); |
2783 | efx->type = (const struct efx_nic_type *) entry->driver_data; | |
2784 | net_dev->features |= (efx->type->offload_features | NETIF_F_SG | | |
97bc5415 | 2785 | NETIF_F_HIGHDMA | NETIF_F_TSO | |
abfe9039 | 2786 | NETIF_F_RXCSUM); |
adeb15aa | 2787 | if (efx->type->offload_features & NETIF_F_V6_CSUM) |
738a8f4b | 2788 | net_dev->features |= NETIF_F_TSO6; |
28506563 BH |
2789 | /* Mask for features that also apply to VLAN devices */ |
2790 | net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | | |
abfe9039 BH |
2791 | NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | |
2792 | NETIF_F_RXCSUM); | |
2793 | /* All offloads can be toggled */ | |
2794 | net_dev->hw_features = net_dev->features & ~NETIF_F_HIGHDMA; | |
8ceee660 | 2795 | pci_set_drvdata(pci_dev, efx); |
62776d03 | 2796 | SET_NETDEV_DEV(net_dev, &pci_dev->dev); |
adeb15aa | 2797 | rc = efx_init_struct(efx, pci_dev, net_dev); |
8ceee660 BH |
2798 | if (rc) |
2799 | goto fail1; | |
2800 | ||
62776d03 | 2801 | netif_info(efx, probe, efx->net_dev, |
ff79c8ac | 2802 | "Solarflare NIC detected\n"); |
8ceee660 | 2803 | |
460eeaa0 BH |
2804 | efx_print_product_vpd(efx); |
2805 | ||
8ceee660 BH |
2806 | /* Set up basic I/O (BAR mappings etc) */ |
2807 | rc = efx_init_io(efx); | |
2808 | if (rc) | |
2809 | goto fail2; | |
2810 | ||
fadac6aa | 2811 | rc = efx_pci_probe_main(efx); |
fadac6aa BH |
2812 | if (rc) |
2813 | goto fail3; | |
8ceee660 | 2814 | |
8ceee660 BH |
2815 | rc = efx_register_netdev(efx); |
2816 | if (rc) | |
fadac6aa | 2817 | goto fail4; |
8ceee660 | 2818 | |
cd2d5b52 BH |
2819 | rc = efx_sriov_init(efx); |
2820 | if (rc) | |
2821 | netif_err(efx, probe, efx->net_dev, | |
2822 | "SR-IOV can't be enabled rc %d\n", rc); | |
2823 | ||
62776d03 | 2824 | netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); |
a5211bb5 | 2825 | |
7c43161c | 2826 | /* Try to create MTDs, but allow this to fail */ |
a5211bb5 | 2827 | rtnl_lock(); |
7c43161c | 2828 | rc = efx_mtd_probe(efx); |
a5211bb5 | 2829 | rtnl_unlock(); |
7c43161c BH |
2830 | if (rc) |
2831 | netif_warn(efx, probe, efx->net_dev, | |
2832 | "failed to create MTDs (%d)\n", rc); | |
2833 | ||
626950db AR |
2834 | rc = pci_enable_pcie_error_reporting(pci_dev); |
2835 | if (rc && rc != -EINVAL) | |
2836 | netif_warn(efx, probe, efx->net_dev, | |
2837 | "pci_enable_pcie_error_reporting failed (%d)\n", rc); | |
2838 | ||
8ceee660 BH |
2839 | return 0; |
2840 | ||
8ceee660 | 2841 | fail4: |
fadac6aa | 2842 | efx_pci_remove_main(efx); |
8ceee660 BH |
2843 | fail3: |
2844 | efx_fini_io(efx); | |
2845 | fail2: | |
2846 | efx_fini_struct(efx); | |
2847 | fail1: | |
3de4e301 | 2848 | pci_set_drvdata(pci_dev, NULL); |
5e2a911c | 2849 | WARN_ON(rc > 0); |
62776d03 | 2850 | netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); |
8ceee660 BH |
2851 | free_netdev(net_dev); |
2852 | return rc; | |
2853 | } | |
2854 | ||
89c758fa BH |
2855 | static int efx_pm_freeze(struct device *dev) |
2856 | { | |
2857 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
2858 | ||
61da026d BH |
2859 | rtnl_lock(); |
2860 | ||
6032fb56 BH |
2861 | if (efx->state != STATE_DISABLED) { |
2862 | efx->state = STATE_UNINIT; | |
89c758fa | 2863 | |
c2f3b8e3 | 2864 | efx_device_detach_sync(efx); |
89c758fa | 2865 | |
6032fb56 | 2866 | efx_stop_all(efx); |
d8291187 | 2867 | efx_disable_interrupts(efx); |
6032fb56 | 2868 | } |
89c758fa | 2869 | |
61da026d BH |
2870 | rtnl_unlock(); |
2871 | ||
89c758fa BH |
2872 | return 0; |
2873 | } | |
2874 | ||
2875 | static int efx_pm_thaw(struct device *dev) | |
2876 | { | |
261e4d96 | 2877 | int rc; |
89c758fa BH |
2878 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); |
2879 | ||
61da026d BH |
2880 | rtnl_lock(); |
2881 | ||
6032fb56 | 2882 | if (efx->state != STATE_DISABLED) { |
261e4d96 JC |
2883 | rc = efx_enable_interrupts(efx); |
2884 | if (rc) | |
2885 | goto fail; | |
89c758fa | 2886 | |
6032fb56 BH |
2887 | mutex_lock(&efx->mac_lock); |
2888 | efx->phy_op->reconfigure(efx); | |
2889 | mutex_unlock(&efx->mac_lock); | |
89c758fa | 2890 | |
6032fb56 | 2891 | efx_start_all(efx); |
89c758fa | 2892 | |
6032fb56 | 2893 | netif_device_attach(efx->net_dev); |
89c758fa | 2894 | |
6032fb56 | 2895 | efx->state = STATE_READY; |
89c758fa | 2896 | |
6032fb56 BH |
2897 | efx->type->resume_wol(efx); |
2898 | } | |
89c758fa | 2899 | |
61da026d BH |
2900 | rtnl_unlock(); |
2901 | ||
319ba649 SH |
2902 | /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ |
2903 | queue_work(reset_workqueue, &efx->reset_work); | |
2904 | ||
89c758fa | 2905 | return 0; |
261e4d96 JC |
2906 | |
2907 | fail: | |
2908 | rtnl_unlock(); | |
2909 | ||
2910 | return rc; | |
89c758fa BH |
2911 | } |
2912 | ||
2913 | static int efx_pm_poweroff(struct device *dev) | |
2914 | { | |
2915 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
2916 | struct efx_nic *efx = pci_get_drvdata(pci_dev); | |
2917 | ||
2918 | efx->type->fini(efx); | |
2919 | ||
a7d529ae | 2920 | efx->reset_pending = 0; |
89c758fa BH |
2921 | |
2922 | pci_save_state(pci_dev); | |
2923 | return pci_set_power_state(pci_dev, PCI_D3hot); | |
2924 | } | |
2925 | ||
2926 | /* Used for both resume and restore */ | |
2927 | static int efx_pm_resume(struct device *dev) | |
2928 | { | |
2929 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
2930 | struct efx_nic *efx = pci_get_drvdata(pci_dev); | |
2931 | int rc; | |
2932 | ||
2933 | rc = pci_set_power_state(pci_dev, PCI_D0); | |
2934 | if (rc) | |
2935 | return rc; | |
2936 | pci_restore_state(pci_dev); | |
2937 | rc = pci_enable_device(pci_dev); | |
2938 | if (rc) | |
2939 | return rc; | |
2940 | pci_set_master(efx->pci_dev); | |
2941 | rc = efx->type->reset(efx, RESET_TYPE_ALL); | |
2942 | if (rc) | |
2943 | return rc; | |
2944 | rc = efx->type->init(efx); | |
2945 | if (rc) | |
2946 | return rc; | |
261e4d96 JC |
2947 | rc = efx_pm_thaw(dev); |
2948 | return rc; | |
89c758fa BH |
2949 | } |
2950 | ||
2951 | static int efx_pm_suspend(struct device *dev) | |
2952 | { | |
2953 | int rc; | |
2954 | ||
2955 | efx_pm_freeze(dev); | |
2956 | rc = efx_pm_poweroff(dev); | |
2957 | if (rc) | |
2958 | efx_pm_resume(dev); | |
2959 | return rc; | |
2960 | } | |
2961 | ||
18e83e4c | 2962 | static const struct dev_pm_ops efx_pm_ops = { |
89c758fa BH |
2963 | .suspend = efx_pm_suspend, |
2964 | .resume = efx_pm_resume, | |
2965 | .freeze = efx_pm_freeze, | |
2966 | .thaw = efx_pm_thaw, | |
2967 | .poweroff = efx_pm_poweroff, | |
2968 | .restore = efx_pm_resume, | |
2969 | }; | |
2970 | ||
626950db AR |
2971 | /* A PCI error affecting this device was detected. |
2972 | * At this point MMIO and DMA may be disabled. | |
2973 | * Stop the software path and request a slot reset. | |
2974 | */ | |
debd0034 | 2975 | static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev, |
2976 | enum pci_channel_state state) | |
626950db AR |
2977 | { |
2978 | pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; | |
2979 | struct efx_nic *efx = pci_get_drvdata(pdev); | |
2980 | ||
2981 | if (state == pci_channel_io_perm_failure) | |
2982 | return PCI_ERS_RESULT_DISCONNECT; | |
2983 | ||
2984 | rtnl_lock(); | |
2985 | ||
2986 | if (efx->state != STATE_DISABLED) { | |
2987 | efx->state = STATE_RECOVERY; | |
2988 | efx->reset_pending = 0; | |
2989 | ||
2990 | efx_device_detach_sync(efx); | |
2991 | ||
2992 | efx_stop_all(efx); | |
d8291187 | 2993 | efx_disable_interrupts(efx); |
626950db AR |
2994 | |
2995 | status = PCI_ERS_RESULT_NEED_RESET; | |
2996 | } else { | |
2997 | /* If the interface is disabled we don't want to do anything | |
2998 | * with it. | |
2999 | */ | |
3000 | status = PCI_ERS_RESULT_RECOVERED; | |
3001 | } | |
3002 | ||
3003 | rtnl_unlock(); | |
3004 | ||
3005 | pci_disable_device(pdev); | |
3006 | ||
3007 | return status; | |
3008 | } | |
3009 | ||
3010 | /* Fake a successfull reset, which will be performed later in efx_io_resume. */ | |
debd0034 | 3011 | static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev) |
626950db AR |
3012 | { |
3013 | struct efx_nic *efx = pci_get_drvdata(pdev); | |
3014 | pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; | |
3015 | int rc; | |
3016 | ||
3017 | if (pci_enable_device(pdev)) { | |
3018 | netif_err(efx, hw, efx->net_dev, | |
3019 | "Cannot re-enable PCI device after reset.\n"); | |
3020 | status = PCI_ERS_RESULT_DISCONNECT; | |
3021 | } | |
3022 | ||
3023 | rc = pci_cleanup_aer_uncorrect_error_status(pdev); | |
3024 | if (rc) { | |
3025 | netif_err(efx, hw, efx->net_dev, | |
3026 | "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc); | |
3027 | /* Non-fatal error. Continue. */ | |
3028 | } | |
3029 | ||
3030 | return status; | |
3031 | } | |
3032 | ||
3033 | /* Perform the actual reset and resume I/O operations. */ | |
3034 | static void efx_io_resume(struct pci_dev *pdev) | |
3035 | { | |
3036 | struct efx_nic *efx = pci_get_drvdata(pdev); | |
3037 | int rc; | |
3038 | ||
3039 | rtnl_lock(); | |
3040 | ||
3041 | if (efx->state == STATE_DISABLED) | |
3042 | goto out; | |
3043 | ||
3044 | rc = efx_reset(efx, RESET_TYPE_ALL); | |
3045 | if (rc) { | |
3046 | netif_err(efx, hw, efx->net_dev, | |
3047 | "efx_reset failed after PCI error (%d)\n", rc); | |
3048 | } else { | |
3049 | efx->state = STATE_READY; | |
3050 | netif_dbg(efx, hw, efx->net_dev, | |
3051 | "Done resetting and resuming IO after PCI error.\n"); | |
3052 | } | |
3053 | ||
3054 | out: | |
3055 | rtnl_unlock(); | |
3056 | } | |
3057 | ||
3058 | /* For simplicity and reliability, we always require a slot reset and try to | |
3059 | * reset the hardware when a pci error affecting the device is detected. | |
3060 | * We leave both the link_reset and mmio_enabled callback unimplemented: | |
3061 | * with our request for slot reset the mmio_enabled callback will never be | |
3062 | * called, and the link_reset callback is not used by AER or EEH mechanisms. | |
3063 | */ | |
3064 | static struct pci_error_handlers efx_err_handlers = { | |
3065 | .error_detected = efx_io_error_detected, | |
3066 | .slot_reset = efx_io_slot_reset, | |
3067 | .resume = efx_io_resume, | |
3068 | }; | |
3069 | ||
8ceee660 | 3070 | static struct pci_driver efx_pci_driver = { |
c5d5f5fd | 3071 | .name = KBUILD_MODNAME, |
8ceee660 BH |
3072 | .id_table = efx_pci_table, |
3073 | .probe = efx_pci_probe, | |
3074 | .remove = efx_pci_remove, | |
89c758fa | 3075 | .driver.pm = &efx_pm_ops, |
626950db | 3076 | .err_handler = &efx_err_handlers, |
8ceee660 BH |
3077 | }; |
3078 | ||
3079 | /************************************************************************** | |
3080 | * | |
3081 | * Kernel module interface | |
3082 | * | |
3083 | *************************************************************************/ | |
3084 | ||
3085 | module_param(interrupt_mode, uint, 0444); | |
3086 | MODULE_PARM_DESC(interrupt_mode, | |
3087 | "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); | |
3088 | ||
3089 | static int __init efx_init_module(void) | |
3090 | { | |
3091 | int rc; | |
3092 | ||
3093 | printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); | |
3094 | ||
3095 | rc = register_netdevice_notifier(&efx_netdev_notifier); | |
3096 | if (rc) | |
3097 | goto err_notifier; | |
3098 | ||
cd2d5b52 BH |
3099 | rc = efx_init_sriov(); |
3100 | if (rc) | |
3101 | goto err_sriov; | |
3102 | ||
1ab00629 SH |
3103 | reset_workqueue = create_singlethread_workqueue("sfc_reset"); |
3104 | if (!reset_workqueue) { | |
3105 | rc = -ENOMEM; | |
3106 | goto err_reset; | |
3107 | } | |
8ceee660 BH |
3108 | |
3109 | rc = pci_register_driver(&efx_pci_driver); | |
3110 | if (rc < 0) | |
3111 | goto err_pci; | |
3112 | ||
3113 | return 0; | |
3114 | ||
3115 | err_pci: | |
1ab00629 SH |
3116 | destroy_workqueue(reset_workqueue); |
3117 | err_reset: | |
cd2d5b52 BH |
3118 | efx_fini_sriov(); |
3119 | err_sriov: | |
8ceee660 BH |
3120 | unregister_netdevice_notifier(&efx_netdev_notifier); |
3121 | err_notifier: | |
3122 | return rc; | |
3123 | } | |
3124 | ||
3125 | static void __exit efx_exit_module(void) | |
3126 | { | |
3127 | printk(KERN_INFO "Solarflare NET driver unloading\n"); | |
3128 | ||
3129 | pci_unregister_driver(&efx_pci_driver); | |
1ab00629 | 3130 | destroy_workqueue(reset_workqueue); |
cd2d5b52 | 3131 | efx_fini_sriov(); |
8ceee660 BH |
3132 | unregister_netdevice_notifier(&efx_netdev_notifier); |
3133 | ||
3134 | } | |
3135 | ||
3136 | module_init(efx_init_module); | |
3137 | module_exit(efx_exit_module); | |
3138 | ||
906bb26c BH |
3139 | MODULE_AUTHOR("Solarflare Communications and " |
3140 | "Michael Brown <mbrown@fensystems.co.uk>"); | |
8ceee660 BH |
3141 | MODULE_DESCRIPTION("Solarflare Communications network driver"); |
3142 | MODULE_LICENSE("GPL"); | |
3143 | MODULE_DEVICE_TABLE(pci, efx_pci_table); |