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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", | |
74cd60a4 | 86 | [RESET_TYPE_MC_BIST] = "MC_BIST", |
c459302d BH |
87 | }; |
88 | ||
1ab00629 SH |
89 | /* Reset workqueue. If any NIC has a hardware failure then a reset will be |
90 | * queued onto this work queue. This is not a per-nic work queue, because | |
91 | * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised. | |
92 | */ | |
93 | static struct workqueue_struct *reset_workqueue; | |
94 | ||
74cd60a4 JC |
95 | /* How often and how many times to poll for a reset while waiting for a |
96 | * BIST that another function started to complete. | |
97 | */ | |
98 | #define BIST_WAIT_DELAY_MS 100 | |
99 | #define BIST_WAIT_DELAY_COUNT 100 | |
100 | ||
8ceee660 BH |
101 | /************************************************************************** |
102 | * | |
103 | * Configurable values | |
104 | * | |
105 | *************************************************************************/ | |
106 | ||
8ceee660 BH |
107 | /* |
108 | * Use separate channels for TX and RX events | |
109 | * | |
28b581ab NT |
110 | * Set this to 1 to use separate channels for TX and RX. It allows us |
111 | * to control interrupt affinity separately for TX and RX. | |
8ceee660 | 112 | * |
28b581ab | 113 | * This is only used in MSI-X interrupt mode |
8ceee660 | 114 | */ |
b9cc977d BH |
115 | static bool separate_tx_channels; |
116 | module_param(separate_tx_channels, bool, 0444); | |
28b581ab NT |
117 | MODULE_PARM_DESC(separate_tx_channels, |
118 | "Use separate channels for TX and RX"); | |
8ceee660 BH |
119 | |
120 | /* This is the weight assigned to each of the (per-channel) virtual | |
121 | * NAPI devices. | |
122 | */ | |
123 | static int napi_weight = 64; | |
124 | ||
125 | /* This is the time (in jiffies) between invocations of the hardware | |
626950db AR |
126 | * monitor. |
127 | * On Falcon-based NICs, this will: | |
e254c274 BH |
128 | * - Check the on-board hardware monitor; |
129 | * - Poll the link state and reconfigure the hardware as necessary. | |
626950db AR |
130 | * On Siena-based NICs for power systems with EEH support, this will give EEH a |
131 | * chance to start. | |
8ceee660 | 132 | */ |
d215697f | 133 | static unsigned int efx_monitor_interval = 1 * HZ; |
8ceee660 | 134 | |
8ceee660 BH |
135 | /* Initial interrupt moderation settings. They can be modified after |
136 | * module load with ethtool. | |
137 | * | |
138 | * The default for RX should strike a balance between increasing the | |
139 | * round-trip latency and reducing overhead. | |
140 | */ | |
141 | static unsigned int rx_irq_mod_usec = 60; | |
142 | ||
143 | /* Initial interrupt moderation settings. They can be modified after | |
144 | * module load with ethtool. | |
145 | * | |
146 | * This default is chosen to ensure that a 10G link does not go idle | |
147 | * while a TX queue is stopped after it has become full. A queue is | |
148 | * restarted when it drops below half full. The time this takes (assuming | |
149 | * worst case 3 descriptors per packet and 1024 descriptors) is | |
150 | * 512 / 3 * 1.2 = 205 usec. | |
151 | */ | |
152 | static unsigned int tx_irq_mod_usec = 150; | |
153 | ||
154 | /* This is the first interrupt mode to try out of: | |
155 | * 0 => MSI-X | |
156 | * 1 => MSI | |
157 | * 2 => legacy | |
158 | */ | |
159 | static unsigned int interrupt_mode; | |
160 | ||
161 | /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS), | |
162 | * i.e. the number of CPUs among which we may distribute simultaneous | |
163 | * interrupt handling. | |
164 | * | |
165 | * Cards without MSI-X will only target one CPU via legacy or MSI interrupt. | |
cdb08f8f | 166 | * The default (0) means to assign an interrupt to each core. |
8ceee660 BH |
167 | */ |
168 | static unsigned int rss_cpus; | |
169 | module_param(rss_cpus, uint, 0444); | |
170 | MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling"); | |
171 | ||
b9cc977d BH |
172 | static bool phy_flash_cfg; |
173 | module_param(phy_flash_cfg, bool, 0644); | |
84ae48fe BH |
174 | MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially"); |
175 | ||
e7bed9c8 | 176 | static unsigned irq_adapt_low_thresh = 8000; |
6fb70fd1 BH |
177 | module_param(irq_adapt_low_thresh, uint, 0644); |
178 | MODULE_PARM_DESC(irq_adapt_low_thresh, | |
179 | "Threshold score for reducing IRQ moderation"); | |
180 | ||
e7bed9c8 | 181 | static unsigned irq_adapt_high_thresh = 16000; |
6fb70fd1 BH |
182 | module_param(irq_adapt_high_thresh, uint, 0644); |
183 | MODULE_PARM_DESC(irq_adapt_high_thresh, | |
184 | "Threshold score for increasing IRQ moderation"); | |
185 | ||
62776d03 BH |
186 | static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE | |
187 | NETIF_MSG_LINK | NETIF_MSG_IFDOWN | | |
188 | NETIF_MSG_IFUP | NETIF_MSG_RX_ERR | | |
189 | NETIF_MSG_TX_ERR | NETIF_MSG_HW); | |
190 | module_param(debug, uint, 0); | |
191 | MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value"); | |
192 | ||
8ceee660 BH |
193 | /************************************************************************** |
194 | * | |
195 | * Utility functions and prototypes | |
196 | * | |
197 | *************************************************************************/ | |
4642610c | 198 | |
261e4d96 | 199 | static int efx_soft_enable_interrupts(struct efx_nic *efx); |
d8291187 | 200 | static void efx_soft_disable_interrupts(struct efx_nic *efx); |
7f967c01 | 201 | static void efx_remove_channel(struct efx_channel *channel); |
4642610c | 202 | static void efx_remove_channels(struct efx_nic *efx); |
7f967c01 | 203 | static const struct efx_channel_type efx_default_channel_type; |
8ceee660 | 204 | static void efx_remove_port(struct efx_nic *efx); |
7f967c01 | 205 | static void efx_init_napi_channel(struct efx_channel *channel); |
8ceee660 | 206 | static void efx_fini_napi(struct efx_nic *efx); |
e8f14992 | 207 | static void efx_fini_napi_channel(struct efx_channel *channel); |
4642610c BH |
208 | static void efx_fini_struct(struct efx_nic *efx); |
209 | static void efx_start_all(struct efx_nic *efx); | |
210 | static void efx_stop_all(struct efx_nic *efx); | |
8ceee660 BH |
211 | |
212 | #define EFX_ASSERT_RESET_SERIALISED(efx) \ | |
213 | do { \ | |
f16aeea0 | 214 | if ((efx->state == STATE_READY) || \ |
626950db | 215 | (efx->state == STATE_RECOVERY) || \ |
332c1ce9 | 216 | (efx->state == STATE_DISABLED)) \ |
8ceee660 BH |
217 | ASSERT_RTNL(); \ |
218 | } while (0) | |
219 | ||
8b7325b4 BH |
220 | static int efx_check_disabled(struct efx_nic *efx) |
221 | { | |
626950db | 222 | if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) { |
8b7325b4 BH |
223 | netif_err(efx, drv, efx->net_dev, |
224 | "device is disabled due to earlier errors\n"); | |
225 | return -EIO; | |
226 | } | |
227 | return 0; | |
228 | } | |
229 | ||
8ceee660 BH |
230 | /************************************************************************** |
231 | * | |
232 | * Event queue processing | |
233 | * | |
234 | *************************************************************************/ | |
235 | ||
236 | /* Process channel's event queue | |
237 | * | |
238 | * This function is responsible for processing the event queue of a | |
239 | * single channel. The caller must guarantee that this function will | |
240 | * never be concurrently called more than once on the same channel, | |
241 | * though different channels may be being processed concurrently. | |
242 | */ | |
fa236e18 | 243 | static int efx_process_channel(struct efx_channel *channel, int budget) |
8ceee660 | 244 | { |
fa236e18 | 245 | int spent; |
8ceee660 | 246 | |
9f2cb71c | 247 | if (unlikely(!channel->enabled)) |
42cbe2d7 | 248 | return 0; |
8ceee660 | 249 | |
fa236e18 | 250 | spent = efx_nic_process_eventq(channel, budget); |
d9ab7007 BH |
251 | if (spent && efx_channel_has_rx_queue(channel)) { |
252 | struct efx_rx_queue *rx_queue = | |
253 | efx_channel_get_rx_queue(channel); | |
254 | ||
ff734ef4 | 255 | efx_rx_flush_packet(channel); |
cce28794 | 256 | efx_fast_push_rx_descriptors(rx_queue, true); |
8ceee660 BH |
257 | } |
258 | ||
fa236e18 | 259 | return spent; |
8ceee660 BH |
260 | } |
261 | ||
8ceee660 BH |
262 | /* NAPI poll handler |
263 | * | |
264 | * NAPI guarantees serialisation of polls of the same device, which | |
265 | * provides the guarantee required by efx_process_channel(). | |
266 | */ | |
267 | static int efx_poll(struct napi_struct *napi, int budget) | |
268 | { | |
269 | struct efx_channel *channel = | |
270 | container_of(napi, struct efx_channel, napi_str); | |
62776d03 | 271 | struct efx_nic *efx = channel->efx; |
fa236e18 | 272 | int spent; |
8ceee660 | 273 | |
62776d03 BH |
274 | netif_vdbg(efx, intr, efx->net_dev, |
275 | "channel %d NAPI poll executing on CPU %d\n", | |
276 | channel->channel, raw_smp_processor_id()); | |
8ceee660 | 277 | |
fa236e18 | 278 | spent = efx_process_channel(channel, budget); |
8ceee660 | 279 | |
fa236e18 | 280 | if (spent < budget) { |
9d9a6973 | 281 | if (efx_channel_has_rx_queue(channel) && |
6fb70fd1 BH |
282 | efx->irq_rx_adaptive && |
283 | unlikely(++channel->irq_count == 1000)) { | |
6fb70fd1 BH |
284 | if (unlikely(channel->irq_mod_score < |
285 | irq_adapt_low_thresh)) { | |
0d86ebd8 BH |
286 | if (channel->irq_moderation > 1) { |
287 | channel->irq_moderation -= 1; | |
ef2b90ee | 288 | efx->type->push_irq_moderation(channel); |
0d86ebd8 | 289 | } |
6fb70fd1 BH |
290 | } else if (unlikely(channel->irq_mod_score > |
291 | irq_adapt_high_thresh)) { | |
0d86ebd8 BH |
292 | if (channel->irq_moderation < |
293 | efx->irq_rx_moderation) { | |
294 | channel->irq_moderation += 1; | |
ef2b90ee | 295 | efx->type->push_irq_moderation(channel); |
0d86ebd8 | 296 | } |
6fb70fd1 | 297 | } |
6fb70fd1 BH |
298 | channel->irq_count = 0; |
299 | channel->irq_mod_score = 0; | |
300 | } | |
301 | ||
64d8ad6d BH |
302 | efx_filter_rfs_expire(channel); |
303 | ||
8ceee660 | 304 | /* There is no race here; although napi_disable() will |
288379f0 | 305 | * only wait for napi_complete(), this isn't a problem |
514bedbc | 306 | * since efx_nic_eventq_read_ack() will have no effect if |
8ceee660 BH |
307 | * interrupts have already been disabled. |
308 | */ | |
288379f0 | 309 | napi_complete(napi); |
514bedbc | 310 | efx_nic_eventq_read_ack(channel); |
8ceee660 BH |
311 | } |
312 | ||
fa236e18 | 313 | return spent; |
8ceee660 BH |
314 | } |
315 | ||
8ceee660 BH |
316 | /* Create event queue |
317 | * Event queue memory allocations are done only once. If the channel | |
318 | * is reset, the memory buffer will be reused; this guards against | |
319 | * errors during channel reset and also simplifies interrupt handling. | |
320 | */ | |
321 | static int efx_probe_eventq(struct efx_channel *channel) | |
322 | { | |
ecc910f5 SH |
323 | struct efx_nic *efx = channel->efx; |
324 | unsigned long entries; | |
325 | ||
86ee5302 | 326 | netif_dbg(efx, probe, efx->net_dev, |
62776d03 | 327 | "chan %d create event queue\n", channel->channel); |
8ceee660 | 328 | |
ecc910f5 SH |
329 | /* Build an event queue with room for one event per tx and rx buffer, |
330 | * plus some extra for link state events and MCDI completions. */ | |
331 | entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128); | |
332 | EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE); | |
333 | channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1; | |
334 | ||
152b6a62 | 335 | return efx_nic_probe_eventq(channel); |
8ceee660 BH |
336 | } |
337 | ||
338 | /* Prepare channel's event queue */ | |
261e4d96 | 339 | static int efx_init_eventq(struct efx_channel *channel) |
8ceee660 | 340 | { |
15acb1ce | 341 | struct efx_nic *efx = channel->efx; |
261e4d96 JC |
342 | int rc; |
343 | ||
344 | EFX_WARN_ON_PARANOID(channel->eventq_init); | |
345 | ||
15acb1ce | 346 | netif_dbg(efx, drv, efx->net_dev, |
62776d03 | 347 | "chan %d init event queue\n", channel->channel); |
8ceee660 | 348 | |
261e4d96 JC |
349 | rc = efx_nic_init_eventq(channel); |
350 | if (rc == 0) { | |
15acb1ce | 351 | efx->type->push_irq_moderation(channel); |
261e4d96 JC |
352 | channel->eventq_read_ptr = 0; |
353 | channel->eventq_init = true; | |
354 | } | |
355 | return rc; | |
8ceee660 BH |
356 | } |
357 | ||
9f2cb71c BH |
358 | /* Enable event queue processing and NAPI */ |
359 | static void efx_start_eventq(struct efx_channel *channel) | |
360 | { | |
361 | netif_dbg(channel->efx, ifup, channel->efx->net_dev, | |
362 | "chan %d start event queue\n", channel->channel); | |
363 | ||
514bedbc | 364 | /* Make sure the NAPI handler sees the enabled flag set */ |
9f2cb71c BH |
365 | channel->enabled = true; |
366 | smp_wmb(); | |
367 | ||
368 | napi_enable(&channel->napi_str); | |
369 | efx_nic_eventq_read_ack(channel); | |
370 | } | |
371 | ||
372 | /* Disable event queue processing and NAPI */ | |
373 | static void efx_stop_eventq(struct efx_channel *channel) | |
374 | { | |
375 | if (!channel->enabled) | |
376 | return; | |
377 | ||
378 | napi_disable(&channel->napi_str); | |
379 | channel->enabled = false; | |
380 | } | |
381 | ||
8ceee660 BH |
382 | static void efx_fini_eventq(struct efx_channel *channel) |
383 | { | |
be3fc09c BH |
384 | if (!channel->eventq_init) |
385 | return; | |
386 | ||
62776d03 BH |
387 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
388 | "chan %d fini event queue\n", channel->channel); | |
8ceee660 | 389 | |
152b6a62 | 390 | efx_nic_fini_eventq(channel); |
be3fc09c | 391 | channel->eventq_init = false; |
8ceee660 BH |
392 | } |
393 | ||
394 | static void efx_remove_eventq(struct efx_channel *channel) | |
395 | { | |
62776d03 BH |
396 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
397 | "chan %d remove event queue\n", channel->channel); | |
8ceee660 | 398 | |
152b6a62 | 399 | efx_nic_remove_eventq(channel); |
8ceee660 BH |
400 | } |
401 | ||
402 | /************************************************************************** | |
403 | * | |
404 | * Channel handling | |
405 | * | |
406 | *************************************************************************/ | |
407 | ||
7f967c01 | 408 | /* Allocate and initialise a channel structure. */ |
4642610c BH |
409 | static struct efx_channel * |
410 | efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel) | |
411 | { | |
412 | struct efx_channel *channel; | |
413 | struct efx_rx_queue *rx_queue; | |
414 | struct efx_tx_queue *tx_queue; | |
415 | int j; | |
416 | ||
7f967c01 BH |
417 | channel = kzalloc(sizeof(*channel), GFP_KERNEL); |
418 | if (!channel) | |
419 | return NULL; | |
4642610c | 420 | |
7f967c01 BH |
421 | channel->efx = efx; |
422 | channel->channel = i; | |
423 | channel->type = &efx_default_channel_type; | |
4642610c | 424 | |
7f967c01 BH |
425 | for (j = 0; j < EFX_TXQ_TYPES; j++) { |
426 | tx_queue = &channel->tx_queue[j]; | |
427 | tx_queue->efx = efx; | |
428 | tx_queue->queue = i * EFX_TXQ_TYPES + j; | |
429 | tx_queue->channel = channel; | |
430 | } | |
4642610c | 431 | |
7f967c01 BH |
432 | rx_queue = &channel->rx_queue; |
433 | rx_queue->efx = efx; | |
434 | setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, | |
435 | (unsigned long)rx_queue); | |
4642610c | 436 | |
7f967c01 BH |
437 | return channel; |
438 | } | |
439 | ||
440 | /* Allocate and initialise a channel structure, copying parameters | |
441 | * (but not resources) from an old channel structure. | |
442 | */ | |
443 | static struct efx_channel * | |
444 | efx_copy_channel(const struct efx_channel *old_channel) | |
445 | { | |
446 | struct efx_channel *channel; | |
447 | struct efx_rx_queue *rx_queue; | |
448 | struct efx_tx_queue *tx_queue; | |
449 | int j; | |
4642610c | 450 | |
7f967c01 BH |
451 | channel = kmalloc(sizeof(*channel), GFP_KERNEL); |
452 | if (!channel) | |
453 | return NULL; | |
454 | ||
455 | *channel = *old_channel; | |
456 | ||
457 | channel->napi_dev = NULL; | |
458 | memset(&channel->eventq, 0, sizeof(channel->eventq)); | |
4642610c | 459 | |
7f967c01 BH |
460 | for (j = 0; j < EFX_TXQ_TYPES; j++) { |
461 | tx_queue = &channel->tx_queue[j]; | |
462 | if (tx_queue->channel) | |
4642610c | 463 | tx_queue->channel = channel; |
7f967c01 BH |
464 | tx_queue->buffer = NULL; |
465 | memset(&tx_queue->txd, 0, sizeof(tx_queue->txd)); | |
4642610c BH |
466 | } |
467 | ||
4642610c | 468 | rx_queue = &channel->rx_queue; |
7f967c01 BH |
469 | rx_queue->buffer = NULL; |
470 | memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd)); | |
4642610c BH |
471 | setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill, |
472 | (unsigned long)rx_queue); | |
473 | ||
474 | return channel; | |
475 | } | |
476 | ||
8ceee660 BH |
477 | static int efx_probe_channel(struct efx_channel *channel) |
478 | { | |
479 | struct efx_tx_queue *tx_queue; | |
480 | struct efx_rx_queue *rx_queue; | |
481 | int rc; | |
482 | ||
62776d03 BH |
483 | netif_dbg(channel->efx, probe, channel->efx->net_dev, |
484 | "creating channel %d\n", channel->channel); | |
8ceee660 | 485 | |
7f967c01 BH |
486 | rc = channel->type->pre_probe(channel); |
487 | if (rc) | |
488 | goto fail; | |
489 | ||
8ceee660 BH |
490 | rc = efx_probe_eventq(channel); |
491 | if (rc) | |
7f967c01 | 492 | goto fail; |
8ceee660 BH |
493 | |
494 | efx_for_each_channel_tx_queue(tx_queue, channel) { | |
495 | rc = efx_probe_tx_queue(tx_queue); | |
496 | if (rc) | |
7f967c01 | 497 | goto fail; |
8ceee660 BH |
498 | } |
499 | ||
500 | efx_for_each_channel_rx_queue(rx_queue, channel) { | |
501 | rc = efx_probe_rx_queue(rx_queue); | |
502 | if (rc) | |
7f967c01 | 503 | goto fail; |
8ceee660 BH |
504 | } |
505 | ||
8ceee660 BH |
506 | return 0; |
507 | ||
7f967c01 BH |
508 | fail: |
509 | efx_remove_channel(channel); | |
8ceee660 BH |
510 | return rc; |
511 | } | |
512 | ||
7f967c01 BH |
513 | static void |
514 | efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len) | |
515 | { | |
516 | struct efx_nic *efx = channel->efx; | |
517 | const char *type; | |
518 | int number; | |
519 | ||
520 | number = channel->channel; | |
521 | if (efx->tx_channel_offset == 0) { | |
522 | type = ""; | |
523 | } else if (channel->channel < efx->tx_channel_offset) { | |
524 | type = "-rx"; | |
525 | } else { | |
526 | type = "-tx"; | |
527 | number -= efx->tx_channel_offset; | |
528 | } | |
529 | snprintf(buf, len, "%s%s-%d", efx->name, type, number); | |
530 | } | |
8ceee660 | 531 | |
56536e9c BH |
532 | static void efx_set_channel_names(struct efx_nic *efx) |
533 | { | |
534 | struct efx_channel *channel; | |
56536e9c | 535 | |
7f967c01 BH |
536 | efx_for_each_channel(channel, efx) |
537 | channel->type->get_name(channel, | |
d8291187 BH |
538 | efx->msi_context[channel->channel].name, |
539 | sizeof(efx->msi_context[0].name)); | |
56536e9c BH |
540 | } |
541 | ||
4642610c BH |
542 | static int efx_probe_channels(struct efx_nic *efx) |
543 | { | |
544 | struct efx_channel *channel; | |
545 | int rc; | |
546 | ||
547 | /* Restart special buffer allocation */ | |
548 | efx->next_buffer_table = 0; | |
549 | ||
c92aaff1 BH |
550 | /* Probe channels in reverse, so that any 'extra' channels |
551 | * use the start of the buffer table. This allows the traffic | |
552 | * channels to be resized without moving them or wasting the | |
553 | * entries before them. | |
554 | */ | |
555 | efx_for_each_channel_rev(channel, efx) { | |
4642610c BH |
556 | rc = efx_probe_channel(channel); |
557 | if (rc) { | |
558 | netif_err(efx, probe, efx->net_dev, | |
559 | "failed to create channel %d\n", | |
560 | channel->channel); | |
561 | goto fail; | |
562 | } | |
563 | } | |
564 | efx_set_channel_names(efx); | |
565 | ||
566 | return 0; | |
567 | ||
568 | fail: | |
569 | efx_remove_channels(efx); | |
570 | return rc; | |
571 | } | |
572 | ||
8ceee660 BH |
573 | /* Channels are shutdown and reinitialised whilst the NIC is running |
574 | * to propagate configuration changes (mtu, checksum offload), or | |
575 | * to clear hardware error conditions | |
576 | */ | |
9f2cb71c | 577 | static void efx_start_datapath(struct efx_nic *efx) |
8ceee660 | 578 | { |
85740cdf | 579 | bool old_rx_scatter = efx->rx_scatter; |
8ceee660 BH |
580 | struct efx_tx_queue *tx_queue; |
581 | struct efx_rx_queue *rx_queue; | |
582 | struct efx_channel *channel; | |
85740cdf | 583 | size_t rx_buf_len; |
8ceee660 | 584 | |
f7f13b0b BH |
585 | /* Calculate the rx buffer allocation parameters required to |
586 | * support the current MTU, including padding for header | |
587 | * alignment and overruns. | |
588 | */ | |
43a3739d | 589 | efx->rx_dma_len = (efx->rx_prefix_size + |
272baeeb BH |
590 | EFX_MAX_FRAME_LEN(efx->net_dev->mtu) + |
591 | efx->type->rx_buffer_padding); | |
85740cdf | 592 | rx_buf_len = (sizeof(struct efx_rx_page_state) + |
2ec03014 | 593 | efx->rx_ip_align + efx->rx_dma_len); |
85740cdf | 594 | if (rx_buf_len <= PAGE_SIZE) { |
e8c68c0a | 595 | efx->rx_scatter = efx->type->always_rx_scatter; |
85740cdf | 596 | efx->rx_buffer_order = 0; |
85740cdf | 597 | } else if (efx->type->can_rx_scatter) { |
950c54df | 598 | BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE % L1_CACHE_BYTES); |
85740cdf | 599 | BUILD_BUG_ON(sizeof(struct efx_rx_page_state) + |
950c54df BH |
600 | 2 * ALIGN(NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE, |
601 | EFX_RX_BUF_ALIGNMENT) > | |
602 | PAGE_SIZE); | |
85740cdf BH |
603 | efx->rx_scatter = true; |
604 | efx->rx_dma_len = EFX_RX_USR_BUF_SIZE; | |
605 | efx->rx_buffer_order = 0; | |
85740cdf BH |
606 | } else { |
607 | efx->rx_scatter = false; | |
608 | efx->rx_buffer_order = get_order(rx_buf_len); | |
85740cdf BH |
609 | } |
610 | ||
1648a23f DP |
611 | efx_rx_config_page_split(efx); |
612 | if (efx->rx_buffer_order) | |
613 | netif_dbg(efx, drv, efx->net_dev, | |
614 | "RX buf len=%u; page order=%u batch=%u\n", | |
615 | efx->rx_dma_len, efx->rx_buffer_order, | |
616 | efx->rx_pages_per_batch); | |
617 | else | |
618 | netif_dbg(efx, drv, efx->net_dev, | |
619 | "RX buf len=%u step=%u bpp=%u; page batch=%u\n", | |
620 | efx->rx_dma_len, efx->rx_page_buf_step, | |
621 | efx->rx_bufs_per_page, efx->rx_pages_per_batch); | |
2768935a | 622 | |
e8c68c0a | 623 | /* RX filters may also have scatter-enabled flags */ |
85740cdf | 624 | if (efx->rx_scatter != old_rx_scatter) |
add72477 | 625 | efx->type->filter_update_rx_scatter(efx); |
8ceee660 | 626 | |
14bf718f BH |
627 | /* We must keep at least one descriptor in a TX ring empty. |
628 | * We could avoid this when the queue size does not exactly | |
629 | * match the hardware ring size, but it's not that important. | |
630 | * Therefore we stop the queue when one more skb might fill | |
631 | * the ring completely. We wake it when half way back to | |
632 | * empty. | |
633 | */ | |
634 | efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx); | |
635 | efx->txq_wake_thresh = efx->txq_stop_thresh / 2; | |
636 | ||
8ceee660 BH |
637 | /* Initialise the channels */ |
638 | efx_for_each_channel(channel, efx) { | |
3881d8ab | 639 | efx_for_each_channel_tx_queue(tx_queue, channel) { |
bc3c90a2 | 640 | efx_init_tx_queue(tx_queue); |
3881d8ab AR |
641 | atomic_inc(&efx->active_queues); |
642 | } | |
8ceee660 | 643 | |
9f2cb71c | 644 | efx_for_each_channel_rx_queue(rx_queue, channel) { |
bc3c90a2 | 645 | efx_init_rx_queue(rx_queue); |
3881d8ab | 646 | atomic_inc(&efx->active_queues); |
cce28794 JC |
647 | efx_stop_eventq(channel); |
648 | efx_fast_push_rx_descriptors(rx_queue, false); | |
649 | efx_start_eventq(channel); | |
9f2cb71c | 650 | } |
8ceee660 | 651 | |
85740cdf | 652 | WARN_ON(channel->rx_pkt_n_frags); |
8ceee660 | 653 | } |
8ceee660 | 654 | |
2ea4dc28 AR |
655 | efx_ptp_start_datapath(efx); |
656 | ||
9f2cb71c BH |
657 | if (netif_device_present(efx->net_dev)) |
658 | netif_tx_wake_all_queues(efx->net_dev); | |
8ceee660 BH |
659 | } |
660 | ||
9f2cb71c | 661 | static void efx_stop_datapath(struct efx_nic *efx) |
8ceee660 BH |
662 | { |
663 | struct efx_channel *channel; | |
664 | struct efx_tx_queue *tx_queue; | |
665 | struct efx_rx_queue *rx_queue; | |
6bc5d3a9 | 666 | int rc; |
8ceee660 BH |
667 | |
668 | EFX_ASSERT_RESET_SERIALISED(efx); | |
669 | BUG_ON(efx->port_enabled); | |
670 | ||
2ea4dc28 AR |
671 | efx_ptp_stop_datapath(efx); |
672 | ||
d8aec745 BH |
673 | /* Stop RX refill */ |
674 | efx_for_each_channel(channel, efx) { | |
675 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
676 | rx_queue->refill_enabled = false; | |
677 | } | |
678 | ||
8ceee660 | 679 | efx_for_each_channel(channel, efx) { |
9f2cb71c BH |
680 | /* RX packet processing is pipelined, so wait for the |
681 | * NAPI handler to complete. At least event queue 0 | |
682 | * might be kept active by non-data events, so don't | |
683 | * use napi_synchronize() but actually disable NAPI | |
684 | * temporarily. | |
685 | */ | |
686 | if (efx_channel_has_rx_queue(channel)) { | |
687 | efx_stop_eventq(channel); | |
688 | efx_start_eventq(channel); | |
689 | } | |
e42c3d85 | 690 | } |
8ceee660 | 691 | |
e42c3d85 BH |
692 | rc = efx->type->fini_dmaq(efx); |
693 | if (rc && EFX_WORKAROUND_7803(efx)) { | |
694 | /* Schedule a reset to recover from the flush failure. The | |
695 | * descriptor caches reference memory we're about to free, | |
696 | * but falcon_reconfigure_mac_wrapper() won't reconnect | |
697 | * the MACs because of the pending reset. | |
698 | */ | |
699 | netif_err(efx, drv, efx->net_dev, | |
700 | "Resetting to recover from flush failure\n"); | |
701 | efx_schedule_reset(efx, RESET_TYPE_ALL); | |
702 | } else if (rc) { | |
703 | netif_err(efx, drv, efx->net_dev, "failed to flush queues\n"); | |
704 | } else { | |
705 | netif_dbg(efx, drv, efx->net_dev, | |
706 | "successfully flushed all queues\n"); | |
707 | } | |
708 | ||
709 | efx_for_each_channel(channel, efx) { | |
8ceee660 BH |
710 | efx_for_each_channel_rx_queue(rx_queue, channel) |
711 | efx_fini_rx_queue(rx_queue); | |
94b274bf | 712 | efx_for_each_possible_channel_tx_queue(tx_queue, channel) |
8ceee660 | 713 | efx_fini_tx_queue(tx_queue); |
8ceee660 BH |
714 | } |
715 | } | |
716 | ||
717 | static void efx_remove_channel(struct efx_channel *channel) | |
718 | { | |
719 | struct efx_tx_queue *tx_queue; | |
720 | struct efx_rx_queue *rx_queue; | |
721 | ||
62776d03 BH |
722 | netif_dbg(channel->efx, drv, channel->efx->net_dev, |
723 | "destroy chan %d\n", channel->channel); | |
8ceee660 BH |
724 | |
725 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
726 | efx_remove_rx_queue(rx_queue); | |
94b274bf | 727 | efx_for_each_possible_channel_tx_queue(tx_queue, channel) |
8ceee660 BH |
728 | efx_remove_tx_queue(tx_queue); |
729 | efx_remove_eventq(channel); | |
c31e5f9f | 730 | channel->type->post_remove(channel); |
8ceee660 BH |
731 | } |
732 | ||
4642610c BH |
733 | static void efx_remove_channels(struct efx_nic *efx) |
734 | { | |
735 | struct efx_channel *channel; | |
736 | ||
737 | efx_for_each_channel(channel, efx) | |
738 | efx_remove_channel(channel); | |
739 | } | |
740 | ||
741 | int | |
742 | efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries) | |
743 | { | |
744 | struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel; | |
745 | u32 old_rxq_entries, old_txq_entries; | |
7f967c01 | 746 | unsigned i, next_buffer_table = 0; |
261e4d96 | 747 | int rc, rc2; |
8b7325b4 BH |
748 | |
749 | rc = efx_check_disabled(efx); | |
750 | if (rc) | |
751 | return rc; | |
7f967c01 BH |
752 | |
753 | /* Not all channels should be reallocated. We must avoid | |
754 | * reallocating their buffer table entries. | |
755 | */ | |
756 | efx_for_each_channel(channel, efx) { | |
757 | struct efx_rx_queue *rx_queue; | |
758 | struct efx_tx_queue *tx_queue; | |
759 | ||
760 | if (channel->type->copy) | |
761 | continue; | |
762 | next_buffer_table = max(next_buffer_table, | |
763 | channel->eventq.index + | |
764 | channel->eventq.entries); | |
765 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
766 | next_buffer_table = max(next_buffer_table, | |
767 | rx_queue->rxd.index + | |
768 | rx_queue->rxd.entries); | |
769 | efx_for_each_channel_tx_queue(tx_queue, channel) | |
770 | next_buffer_table = max(next_buffer_table, | |
771 | tx_queue->txd.index + | |
772 | tx_queue->txd.entries); | |
773 | } | |
4642610c | 774 | |
29c69a48 | 775 | efx_device_detach_sync(efx); |
4642610c | 776 | efx_stop_all(efx); |
d8291187 | 777 | efx_soft_disable_interrupts(efx); |
4642610c | 778 | |
7f967c01 | 779 | /* Clone channels (where possible) */ |
4642610c BH |
780 | memset(other_channel, 0, sizeof(other_channel)); |
781 | for (i = 0; i < efx->n_channels; i++) { | |
7f967c01 BH |
782 | channel = efx->channel[i]; |
783 | if (channel->type->copy) | |
784 | channel = channel->type->copy(channel); | |
4642610c BH |
785 | if (!channel) { |
786 | rc = -ENOMEM; | |
787 | goto out; | |
788 | } | |
789 | other_channel[i] = channel; | |
790 | } | |
791 | ||
792 | /* Swap entry counts and channel pointers */ | |
793 | old_rxq_entries = efx->rxq_entries; | |
794 | old_txq_entries = efx->txq_entries; | |
795 | efx->rxq_entries = rxq_entries; | |
796 | efx->txq_entries = txq_entries; | |
797 | for (i = 0; i < efx->n_channels; i++) { | |
798 | channel = efx->channel[i]; | |
799 | efx->channel[i] = other_channel[i]; | |
800 | other_channel[i] = channel; | |
801 | } | |
802 | ||
7f967c01 BH |
803 | /* Restart buffer table allocation */ |
804 | efx->next_buffer_table = next_buffer_table; | |
e8f14992 | 805 | |
e8f14992 | 806 | for (i = 0; i < efx->n_channels; i++) { |
7f967c01 BH |
807 | channel = efx->channel[i]; |
808 | if (!channel->type->copy) | |
809 | continue; | |
810 | rc = efx_probe_channel(channel); | |
811 | if (rc) | |
812 | goto rollback; | |
813 | efx_init_napi_channel(efx->channel[i]); | |
e8f14992 | 814 | } |
7f967c01 | 815 | |
4642610c | 816 | out: |
7f967c01 BH |
817 | /* Destroy unused channel structures */ |
818 | for (i = 0; i < efx->n_channels; i++) { | |
819 | channel = other_channel[i]; | |
820 | if (channel && channel->type->copy) { | |
821 | efx_fini_napi_channel(channel); | |
822 | efx_remove_channel(channel); | |
823 | kfree(channel); | |
824 | } | |
825 | } | |
4642610c | 826 | |
261e4d96 JC |
827 | rc2 = efx_soft_enable_interrupts(efx); |
828 | if (rc2) { | |
829 | rc = rc ? rc : rc2; | |
830 | netif_err(efx, drv, efx->net_dev, | |
831 | "unable to restart interrupts on channel reallocation\n"); | |
832 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); | |
833 | } else { | |
834 | efx_start_all(efx); | |
835 | netif_device_attach(efx->net_dev); | |
836 | } | |
4642610c BH |
837 | return rc; |
838 | ||
839 | rollback: | |
840 | /* Swap back */ | |
841 | efx->rxq_entries = old_rxq_entries; | |
842 | efx->txq_entries = old_txq_entries; | |
843 | for (i = 0; i < efx->n_channels; i++) { | |
844 | channel = efx->channel[i]; | |
845 | efx->channel[i] = other_channel[i]; | |
846 | other_channel[i] = channel; | |
847 | } | |
848 | goto out; | |
849 | } | |
850 | ||
90d683af | 851 | void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue) |
8ceee660 | 852 | { |
90d683af | 853 | mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100)); |
8ceee660 BH |
854 | } |
855 | ||
7f967c01 BH |
856 | static const struct efx_channel_type efx_default_channel_type = { |
857 | .pre_probe = efx_channel_dummy_op_int, | |
c31e5f9f | 858 | .post_remove = efx_channel_dummy_op_void, |
7f967c01 BH |
859 | .get_name = efx_get_channel_name, |
860 | .copy = efx_copy_channel, | |
861 | .keep_eventq = false, | |
862 | }; | |
863 | ||
864 | int efx_channel_dummy_op_int(struct efx_channel *channel) | |
865 | { | |
866 | return 0; | |
867 | } | |
868 | ||
c31e5f9f SH |
869 | void efx_channel_dummy_op_void(struct efx_channel *channel) |
870 | { | |
871 | } | |
872 | ||
8ceee660 BH |
873 | /************************************************************************** |
874 | * | |
875 | * Port handling | |
876 | * | |
877 | **************************************************************************/ | |
878 | ||
879 | /* This ensures that the kernel is kept informed (via | |
880 | * netif_carrier_on/off) of the link status, and also maintains the | |
881 | * link status's stop on the port's TX queue. | |
882 | */ | |
fdaa9aed | 883 | void efx_link_status_changed(struct efx_nic *efx) |
8ceee660 | 884 | { |
eb50c0d6 BH |
885 | struct efx_link_state *link_state = &efx->link_state; |
886 | ||
8ceee660 BH |
887 | /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure |
888 | * that no events are triggered between unregister_netdev() and the | |
889 | * driver unloading. A more general condition is that NETDEV_CHANGE | |
890 | * can only be generated between NETDEV_UP and NETDEV_DOWN */ | |
891 | if (!netif_running(efx->net_dev)) | |
892 | return; | |
893 | ||
eb50c0d6 | 894 | if (link_state->up != netif_carrier_ok(efx->net_dev)) { |
8ceee660 BH |
895 | efx->n_link_state_changes++; |
896 | ||
eb50c0d6 | 897 | if (link_state->up) |
8ceee660 BH |
898 | netif_carrier_on(efx->net_dev); |
899 | else | |
900 | netif_carrier_off(efx->net_dev); | |
901 | } | |
902 | ||
903 | /* Status message for kernel log */ | |
2aa9ef11 | 904 | if (link_state->up) |
62776d03 | 905 | netif_info(efx, link, efx->net_dev, |
964e6135 | 906 | "link up at %uMbps %s-duplex (MTU %d)\n", |
62776d03 | 907 | link_state->speed, link_state->fd ? "full" : "half", |
964e6135 | 908 | efx->net_dev->mtu); |
2aa9ef11 | 909 | else |
62776d03 | 910 | netif_info(efx, link, efx->net_dev, "link down\n"); |
8ceee660 BH |
911 | } |
912 | ||
d3245b28 BH |
913 | void efx_link_set_advertising(struct efx_nic *efx, u32 advertising) |
914 | { | |
915 | efx->link_advertising = advertising; | |
916 | if (advertising) { | |
917 | if (advertising & ADVERTISED_Pause) | |
918 | efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX); | |
919 | else | |
920 | efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX); | |
921 | if (advertising & ADVERTISED_Asym_Pause) | |
922 | efx->wanted_fc ^= EFX_FC_TX; | |
923 | } | |
924 | } | |
925 | ||
b5626946 | 926 | void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc) |
d3245b28 BH |
927 | { |
928 | efx->wanted_fc = wanted_fc; | |
929 | if (efx->link_advertising) { | |
930 | if (wanted_fc & EFX_FC_RX) | |
931 | efx->link_advertising |= (ADVERTISED_Pause | | |
932 | ADVERTISED_Asym_Pause); | |
933 | else | |
934 | efx->link_advertising &= ~(ADVERTISED_Pause | | |
935 | ADVERTISED_Asym_Pause); | |
936 | if (wanted_fc & EFX_FC_TX) | |
937 | efx->link_advertising ^= ADVERTISED_Asym_Pause; | |
938 | } | |
939 | } | |
940 | ||
115122af BH |
941 | static void efx_fini_port(struct efx_nic *efx); |
942 | ||
d3245b28 BH |
943 | /* Push loopback/power/transmit disable settings to the PHY, and reconfigure |
944 | * the MAC appropriately. All other PHY configuration changes are pushed | |
945 | * through phy_op->set_settings(), and pushed asynchronously to the MAC | |
946 | * through efx_monitor(). | |
947 | * | |
948 | * Callers must hold the mac_lock | |
949 | */ | |
950 | int __efx_reconfigure_port(struct efx_nic *efx) | |
8ceee660 | 951 | { |
d3245b28 BH |
952 | enum efx_phy_mode phy_mode; |
953 | int rc; | |
8ceee660 | 954 | |
d3245b28 | 955 | WARN_ON(!mutex_is_locked(&efx->mac_lock)); |
8ceee660 | 956 | |
d3245b28 BH |
957 | /* Disable PHY transmit in mac level loopbacks */ |
958 | phy_mode = efx->phy_mode; | |
177dfcd8 BH |
959 | if (LOOPBACK_INTERNAL(efx)) |
960 | efx->phy_mode |= PHY_MODE_TX_DISABLED; | |
961 | else | |
962 | efx->phy_mode &= ~PHY_MODE_TX_DISABLED; | |
177dfcd8 | 963 | |
d3245b28 | 964 | rc = efx->type->reconfigure_port(efx); |
8ceee660 | 965 | |
d3245b28 BH |
966 | if (rc) |
967 | efx->phy_mode = phy_mode; | |
177dfcd8 | 968 | |
d3245b28 | 969 | return rc; |
8ceee660 BH |
970 | } |
971 | ||
972 | /* Reinitialise the MAC to pick up new PHY settings, even if the port is | |
973 | * disabled. */ | |
d3245b28 | 974 | int efx_reconfigure_port(struct efx_nic *efx) |
8ceee660 | 975 | { |
d3245b28 BH |
976 | int rc; |
977 | ||
8ceee660 BH |
978 | EFX_ASSERT_RESET_SERIALISED(efx); |
979 | ||
980 | mutex_lock(&efx->mac_lock); | |
d3245b28 | 981 | rc = __efx_reconfigure_port(efx); |
8ceee660 | 982 | mutex_unlock(&efx->mac_lock); |
d3245b28 BH |
983 | |
984 | return rc; | |
8ceee660 BH |
985 | } |
986 | ||
8be4f3e6 BH |
987 | /* Asynchronous work item for changing MAC promiscuity and multicast |
988 | * hash. Avoid a drain/rx_ingress enable by reconfiguring the current | |
989 | * MAC directly. */ | |
766ca0fa BH |
990 | static void efx_mac_work(struct work_struct *data) |
991 | { | |
992 | struct efx_nic *efx = container_of(data, struct efx_nic, mac_work); | |
993 | ||
994 | mutex_lock(&efx->mac_lock); | |
30b81cda | 995 | if (efx->port_enabled) |
710b208d | 996 | efx->type->reconfigure_mac(efx); |
766ca0fa BH |
997 | mutex_unlock(&efx->mac_lock); |
998 | } | |
999 | ||
8ceee660 BH |
1000 | static int efx_probe_port(struct efx_nic *efx) |
1001 | { | |
1002 | int rc; | |
1003 | ||
62776d03 | 1004 | netif_dbg(efx, probe, efx->net_dev, "create port\n"); |
8ceee660 | 1005 | |
ff3b00a0 SH |
1006 | if (phy_flash_cfg) |
1007 | efx->phy_mode = PHY_MODE_SPECIAL; | |
1008 | ||
ef2b90ee BH |
1009 | /* Connect up MAC/PHY operations table */ |
1010 | rc = efx->type->probe_port(efx); | |
8ceee660 | 1011 | if (rc) |
e42de262 | 1012 | return rc; |
8ceee660 | 1013 | |
e332bcb3 BH |
1014 | /* Initialise MAC address to permanent address */ |
1015 | memcpy(efx->net_dev->dev_addr, efx->net_dev->perm_addr, ETH_ALEN); | |
8ceee660 BH |
1016 | |
1017 | return 0; | |
8ceee660 BH |
1018 | } |
1019 | ||
1020 | static int efx_init_port(struct efx_nic *efx) | |
1021 | { | |
1022 | int rc; | |
1023 | ||
62776d03 | 1024 | netif_dbg(efx, drv, efx->net_dev, "init port\n"); |
8ceee660 | 1025 | |
1dfc5cea BH |
1026 | mutex_lock(&efx->mac_lock); |
1027 | ||
177dfcd8 | 1028 | rc = efx->phy_op->init(efx); |
8ceee660 | 1029 | if (rc) |
1dfc5cea | 1030 | goto fail1; |
8ceee660 | 1031 | |
dc8cfa55 | 1032 | efx->port_initialized = true; |
1dfc5cea | 1033 | |
d3245b28 BH |
1034 | /* Reconfigure the MAC before creating dma queues (required for |
1035 | * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */ | |
710b208d | 1036 | efx->type->reconfigure_mac(efx); |
d3245b28 BH |
1037 | |
1038 | /* Ensure the PHY advertises the correct flow control settings */ | |
1039 | rc = efx->phy_op->reconfigure(efx); | |
1040 | if (rc) | |
1041 | goto fail2; | |
1042 | ||
1dfc5cea | 1043 | mutex_unlock(&efx->mac_lock); |
8ceee660 | 1044 | return 0; |
177dfcd8 | 1045 | |
1dfc5cea | 1046 | fail2: |
177dfcd8 | 1047 | efx->phy_op->fini(efx); |
1dfc5cea BH |
1048 | fail1: |
1049 | mutex_unlock(&efx->mac_lock); | |
177dfcd8 | 1050 | return rc; |
8ceee660 BH |
1051 | } |
1052 | ||
8ceee660 BH |
1053 | static void efx_start_port(struct efx_nic *efx) |
1054 | { | |
62776d03 | 1055 | netif_dbg(efx, ifup, efx->net_dev, "start port\n"); |
8ceee660 BH |
1056 | BUG_ON(efx->port_enabled); |
1057 | ||
1058 | mutex_lock(&efx->mac_lock); | |
dc8cfa55 | 1059 | efx->port_enabled = true; |
8be4f3e6 | 1060 | |
d615c039 | 1061 | /* Ensure MAC ingress/egress is enabled */ |
710b208d | 1062 | efx->type->reconfigure_mac(efx); |
8be4f3e6 | 1063 | |
8ceee660 BH |
1064 | mutex_unlock(&efx->mac_lock); |
1065 | } | |
1066 | ||
d615c039 BH |
1067 | /* Cancel work for MAC reconfiguration, periodic hardware monitoring |
1068 | * and the async self-test, wait for them to finish and prevent them | |
1069 | * being scheduled again. This doesn't cover online resets, which | |
1070 | * should only be cancelled when removing the device. | |
1071 | */ | |
8ceee660 BH |
1072 | static void efx_stop_port(struct efx_nic *efx) |
1073 | { | |
62776d03 | 1074 | netif_dbg(efx, ifdown, efx->net_dev, "stop port\n"); |
8ceee660 | 1075 | |
d615c039 BH |
1076 | EFX_ASSERT_RESET_SERIALISED(efx); |
1077 | ||
8ceee660 | 1078 | mutex_lock(&efx->mac_lock); |
dc8cfa55 | 1079 | efx->port_enabled = false; |
8ceee660 BH |
1080 | mutex_unlock(&efx->mac_lock); |
1081 | ||
1082 | /* Serialise against efx_set_multicast_list() */ | |
73ba7b68 BH |
1083 | netif_addr_lock_bh(efx->net_dev); |
1084 | netif_addr_unlock_bh(efx->net_dev); | |
d615c039 BH |
1085 | |
1086 | cancel_delayed_work_sync(&efx->monitor_work); | |
1087 | efx_selftest_async_cancel(efx); | |
1088 | cancel_work_sync(&efx->mac_work); | |
8ceee660 BH |
1089 | } |
1090 | ||
1091 | static void efx_fini_port(struct efx_nic *efx) | |
1092 | { | |
62776d03 | 1093 | netif_dbg(efx, drv, efx->net_dev, "shut down port\n"); |
8ceee660 BH |
1094 | |
1095 | if (!efx->port_initialized) | |
1096 | return; | |
1097 | ||
177dfcd8 | 1098 | efx->phy_op->fini(efx); |
dc8cfa55 | 1099 | efx->port_initialized = false; |
8ceee660 | 1100 | |
eb50c0d6 | 1101 | efx->link_state.up = false; |
8ceee660 BH |
1102 | efx_link_status_changed(efx); |
1103 | } | |
1104 | ||
1105 | static void efx_remove_port(struct efx_nic *efx) | |
1106 | { | |
62776d03 | 1107 | netif_dbg(efx, drv, efx->net_dev, "destroying port\n"); |
8ceee660 | 1108 | |
ef2b90ee | 1109 | efx->type->remove_port(efx); |
8ceee660 BH |
1110 | } |
1111 | ||
1112 | /************************************************************************** | |
1113 | * | |
1114 | * NIC handling | |
1115 | * | |
1116 | **************************************************************************/ | |
1117 | ||
0bcf4a64 BH |
1118 | static LIST_HEAD(efx_primary_list); |
1119 | static LIST_HEAD(efx_unassociated_list); | |
1120 | ||
1121 | static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right) | |
1122 | { | |
1123 | return left->type == right->type && | |
1124 | left->vpd_sn && right->vpd_sn && | |
1125 | !strcmp(left->vpd_sn, right->vpd_sn); | |
1126 | } | |
1127 | ||
1128 | static void efx_associate(struct efx_nic *efx) | |
1129 | { | |
1130 | struct efx_nic *other, *next; | |
1131 | ||
1132 | if (efx->primary == efx) { | |
1133 | /* Adding primary function; look for secondaries */ | |
1134 | ||
1135 | netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n"); | |
1136 | list_add_tail(&efx->node, &efx_primary_list); | |
1137 | ||
1138 | list_for_each_entry_safe(other, next, &efx_unassociated_list, | |
1139 | node) { | |
1140 | if (efx_same_controller(efx, other)) { | |
1141 | list_del(&other->node); | |
1142 | netif_dbg(other, probe, other->net_dev, | |
1143 | "moving to secondary list of %s %s\n", | |
1144 | pci_name(efx->pci_dev), | |
1145 | efx->net_dev->name); | |
1146 | list_add_tail(&other->node, | |
1147 | &efx->secondary_list); | |
1148 | other->primary = efx; | |
1149 | } | |
1150 | } | |
1151 | } else { | |
1152 | /* Adding secondary function; look for primary */ | |
1153 | ||
1154 | list_for_each_entry(other, &efx_primary_list, node) { | |
1155 | if (efx_same_controller(efx, other)) { | |
1156 | netif_dbg(efx, probe, efx->net_dev, | |
1157 | "adding to secondary list of %s %s\n", | |
1158 | pci_name(other->pci_dev), | |
1159 | other->net_dev->name); | |
1160 | list_add_tail(&efx->node, | |
1161 | &other->secondary_list); | |
1162 | efx->primary = other; | |
1163 | return; | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | netif_dbg(efx, probe, efx->net_dev, | |
1168 | "adding to unassociated list\n"); | |
1169 | list_add_tail(&efx->node, &efx_unassociated_list); | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | static void efx_dissociate(struct efx_nic *efx) | |
1174 | { | |
1175 | struct efx_nic *other, *next; | |
1176 | ||
1177 | list_del(&efx->node); | |
1178 | efx->primary = NULL; | |
1179 | ||
1180 | list_for_each_entry_safe(other, next, &efx->secondary_list, node) { | |
1181 | list_del(&other->node); | |
1182 | netif_dbg(other, probe, other->net_dev, | |
1183 | "moving to unassociated list\n"); | |
1184 | list_add_tail(&other->node, &efx_unassociated_list); | |
1185 | other->primary = NULL; | |
1186 | } | |
1187 | } | |
1188 | ||
8ceee660 BH |
1189 | /* This configures the PCI device to enable I/O and DMA. */ |
1190 | static int efx_init_io(struct efx_nic *efx) | |
1191 | { | |
1192 | struct pci_dev *pci_dev = efx->pci_dev; | |
1193 | dma_addr_t dma_mask = efx->type->max_dma_mask; | |
b105798f | 1194 | unsigned int mem_map_size = efx->type->mem_map_size(efx); |
8ceee660 BH |
1195 | int rc; |
1196 | ||
62776d03 | 1197 | netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n"); |
8ceee660 BH |
1198 | |
1199 | rc = pci_enable_device(pci_dev); | |
1200 | if (rc) { | |
62776d03 BH |
1201 | netif_err(efx, probe, efx->net_dev, |
1202 | "failed to enable PCI device\n"); | |
8ceee660 BH |
1203 | goto fail1; |
1204 | } | |
1205 | ||
1206 | pci_set_master(pci_dev); | |
1207 | ||
1208 | /* Set the PCI DMA mask. Try all possibilities from our | |
1209 | * genuine mask down to 32 bits, because some architectures | |
1210 | * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit | |
1211 | * masks event though they reject 46 bit masks. | |
1212 | */ | |
1213 | while (dma_mask > 0x7fffffffUL) { | |
0e33d870 | 1214 | if (dma_supported(&pci_dev->dev, dma_mask)) { |
9663deda | 1215 | rc = dma_set_mask_and_coherent(&pci_dev->dev, dma_mask); |
e9e01846 BH |
1216 | if (rc == 0) |
1217 | break; | |
1218 | } | |
8ceee660 BH |
1219 | dma_mask >>= 1; |
1220 | } | |
1221 | if (rc) { | |
62776d03 BH |
1222 | netif_err(efx, probe, efx->net_dev, |
1223 | "could not find a suitable DMA mask\n"); | |
8ceee660 BH |
1224 | goto fail2; |
1225 | } | |
62776d03 BH |
1226 | netif_dbg(efx, probe, efx->net_dev, |
1227 | "using DMA mask %llx\n", (unsigned long long) dma_mask); | |
8ceee660 | 1228 | |
dc803df8 BH |
1229 | efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR); |
1230 | rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc"); | |
8ceee660 | 1231 | if (rc) { |
62776d03 BH |
1232 | netif_err(efx, probe, efx->net_dev, |
1233 | "request for memory BAR failed\n"); | |
8ceee660 BH |
1234 | rc = -EIO; |
1235 | goto fail3; | |
1236 | } | |
b105798f | 1237 | efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size); |
8ceee660 | 1238 | if (!efx->membase) { |
62776d03 BH |
1239 | netif_err(efx, probe, efx->net_dev, |
1240 | "could not map memory BAR at %llx+%x\n", | |
b105798f | 1241 | (unsigned long long)efx->membase_phys, mem_map_size); |
8ceee660 BH |
1242 | rc = -ENOMEM; |
1243 | goto fail4; | |
1244 | } | |
62776d03 BH |
1245 | netif_dbg(efx, probe, efx->net_dev, |
1246 | "memory BAR at %llx+%x (virtual %p)\n", | |
b105798f BH |
1247 | (unsigned long long)efx->membase_phys, mem_map_size, |
1248 | efx->membase); | |
8ceee660 BH |
1249 | |
1250 | return 0; | |
1251 | ||
1252 | fail4: | |
dc803df8 | 1253 | pci_release_region(efx->pci_dev, EFX_MEM_BAR); |
8ceee660 | 1254 | fail3: |
2c118e0f | 1255 | efx->membase_phys = 0; |
8ceee660 BH |
1256 | fail2: |
1257 | pci_disable_device(efx->pci_dev); | |
1258 | fail1: | |
1259 | return rc; | |
1260 | } | |
1261 | ||
1262 | static void efx_fini_io(struct efx_nic *efx) | |
1263 | { | |
62776d03 | 1264 | netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n"); |
8ceee660 BH |
1265 | |
1266 | if (efx->membase) { | |
1267 | iounmap(efx->membase); | |
1268 | efx->membase = NULL; | |
1269 | } | |
1270 | ||
1271 | if (efx->membase_phys) { | |
dc803df8 | 1272 | pci_release_region(efx->pci_dev, EFX_MEM_BAR); |
2c118e0f | 1273 | efx->membase_phys = 0; |
8ceee660 BH |
1274 | } |
1275 | ||
1276 | pci_disable_device(efx->pci_dev); | |
1277 | } | |
1278 | ||
a9a52506 | 1279 | static unsigned int efx_wanted_parallelism(struct efx_nic *efx) |
46123d04 | 1280 | { |
cdb08f8f | 1281 | cpumask_var_t thread_mask; |
a16e5b24 | 1282 | unsigned int count; |
46123d04 | 1283 | int cpu; |
5b874e25 | 1284 | |
cd2d5b52 BH |
1285 | if (rss_cpus) { |
1286 | count = rss_cpus; | |
1287 | } else { | |
1288 | if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) { | |
1289 | netif_warn(efx, probe, efx->net_dev, | |
1290 | "RSS disabled due to allocation failure\n"); | |
1291 | return 1; | |
1292 | } | |
46123d04 | 1293 | |
cd2d5b52 BH |
1294 | count = 0; |
1295 | for_each_online_cpu(cpu) { | |
1296 | if (!cpumask_test_cpu(cpu, thread_mask)) { | |
1297 | ++count; | |
1298 | cpumask_or(thread_mask, thread_mask, | |
1299 | topology_thread_cpumask(cpu)); | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | free_cpumask_var(thread_mask); | |
2f8975fb RR |
1304 | } |
1305 | ||
cd2d5b52 BH |
1306 | /* If RSS is requested for the PF *and* VFs then we can't write RSS |
1307 | * table entries that are inaccessible to VFs | |
1308 | */ | |
1309 | if (efx_sriov_wanted(efx) && efx_vf_size(efx) > 1 && | |
1310 | count > efx_vf_size(efx)) { | |
1311 | netif_warn(efx, probe, efx->net_dev, | |
1312 | "Reducing number of RSS channels from %u to %u for " | |
1313 | "VF support. Increase vf-msix-limit to use more " | |
1314 | "channels on the PF.\n", | |
1315 | count, efx_vf_size(efx)); | |
1316 | count = efx_vf_size(efx); | |
46123d04 BH |
1317 | } |
1318 | ||
1319 | return count; | |
1320 | } | |
1321 | ||
1322 | /* Probe the number and type of interrupts we are able to obtain, and | |
1323 | * the resulting numbers of channels and RX queues. | |
1324 | */ | |
64d8ad6d | 1325 | static int efx_probe_interrupts(struct efx_nic *efx) |
8ceee660 | 1326 | { |
7f967c01 BH |
1327 | unsigned int extra_channels = 0; |
1328 | unsigned int i, j; | |
a16e5b24 | 1329 | int rc; |
8ceee660 | 1330 | |
7f967c01 BH |
1331 | for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) |
1332 | if (efx->extra_channel_type[i]) | |
1333 | ++extra_channels; | |
1334 | ||
8ceee660 | 1335 | if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { |
46123d04 | 1336 | struct msix_entry xentries[EFX_MAX_CHANNELS]; |
a16e5b24 | 1337 | unsigned int n_channels; |
aa6ef27e | 1338 | |
a9a52506 | 1339 | n_channels = efx_wanted_parallelism(efx); |
a4900ac9 BH |
1340 | if (separate_tx_channels) |
1341 | n_channels *= 2; | |
7f967c01 | 1342 | n_channels += extra_channels; |
b105798f | 1343 | n_channels = min(n_channels, efx->max_channels); |
8ceee660 | 1344 | |
a4900ac9 | 1345 | for (i = 0; i < n_channels; i++) |
8ceee660 | 1346 | xentries[i].entry = i; |
a4900ac9 | 1347 | rc = pci_enable_msix(efx->pci_dev, xentries, n_channels); |
8ceee660 | 1348 | if (rc > 0) { |
62776d03 BH |
1349 | netif_err(efx, drv, efx->net_dev, |
1350 | "WARNING: Insufficient MSI-X vectors" | |
a16e5b24 | 1351 | " available (%d < %u).\n", rc, n_channels); |
62776d03 BH |
1352 | netif_err(efx, drv, efx->net_dev, |
1353 | "WARNING: Performance may be reduced.\n"); | |
a4900ac9 BH |
1354 | EFX_BUG_ON_PARANOID(rc >= n_channels); |
1355 | n_channels = rc; | |
8ceee660 | 1356 | rc = pci_enable_msix(efx->pci_dev, xentries, |
a4900ac9 | 1357 | n_channels); |
8ceee660 BH |
1358 | } |
1359 | ||
1360 | if (rc == 0) { | |
a4900ac9 | 1361 | efx->n_channels = n_channels; |
7f967c01 BH |
1362 | if (n_channels > extra_channels) |
1363 | n_channels -= extra_channels; | |
a4900ac9 | 1364 | if (separate_tx_channels) { |
7f967c01 BH |
1365 | efx->n_tx_channels = max(n_channels / 2, 1U); |
1366 | efx->n_rx_channels = max(n_channels - | |
1367 | efx->n_tx_channels, | |
1368 | 1U); | |
a4900ac9 | 1369 | } else { |
7f967c01 BH |
1370 | efx->n_tx_channels = n_channels; |
1371 | efx->n_rx_channels = n_channels; | |
a4900ac9 | 1372 | } |
7f967c01 | 1373 | for (i = 0; i < efx->n_channels; i++) |
f7d12cdc BH |
1374 | efx_get_channel(efx, i)->irq = |
1375 | xentries[i].vector; | |
8ceee660 BH |
1376 | } else { |
1377 | /* Fall back to single channel MSI */ | |
1378 | efx->interrupt_mode = EFX_INT_MODE_MSI; | |
62776d03 BH |
1379 | netif_err(efx, drv, efx->net_dev, |
1380 | "could not enable MSI-X\n"); | |
8ceee660 BH |
1381 | } |
1382 | } | |
1383 | ||
1384 | /* Try single interrupt MSI */ | |
1385 | if (efx->interrupt_mode == EFX_INT_MODE_MSI) { | |
28b581ab | 1386 | efx->n_channels = 1; |
a4900ac9 BH |
1387 | efx->n_rx_channels = 1; |
1388 | efx->n_tx_channels = 1; | |
8ceee660 BH |
1389 | rc = pci_enable_msi(efx->pci_dev); |
1390 | if (rc == 0) { | |
f7d12cdc | 1391 | efx_get_channel(efx, 0)->irq = efx->pci_dev->irq; |
8ceee660 | 1392 | } else { |
62776d03 BH |
1393 | netif_err(efx, drv, efx->net_dev, |
1394 | "could not enable MSI\n"); | |
8ceee660 BH |
1395 | efx->interrupt_mode = EFX_INT_MODE_LEGACY; |
1396 | } | |
1397 | } | |
1398 | ||
1399 | /* Assume legacy interrupts */ | |
1400 | if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) { | |
28b581ab | 1401 | efx->n_channels = 1 + (separate_tx_channels ? 1 : 0); |
a4900ac9 BH |
1402 | efx->n_rx_channels = 1; |
1403 | efx->n_tx_channels = 1; | |
8ceee660 BH |
1404 | efx->legacy_irq = efx->pci_dev->irq; |
1405 | } | |
64d8ad6d | 1406 | |
7f967c01 BH |
1407 | /* Assign extra channels if possible */ |
1408 | j = efx->n_channels; | |
1409 | for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) { | |
1410 | if (!efx->extra_channel_type[i]) | |
1411 | continue; | |
1412 | if (efx->interrupt_mode != EFX_INT_MODE_MSIX || | |
1413 | efx->n_channels <= extra_channels) { | |
1414 | efx->extra_channel_type[i]->handle_no_channel(efx); | |
1415 | } else { | |
1416 | --j; | |
1417 | efx_get_channel(efx, j)->type = | |
1418 | efx->extra_channel_type[i]; | |
1419 | } | |
1420 | } | |
1421 | ||
cd2d5b52 | 1422 | /* RSS might be usable on VFs even if it is disabled on the PF */ |
3132d282 | 1423 | efx->rss_spread = ((efx->n_rx_channels > 1 || !efx_sriov_wanted(efx)) ? |
cd2d5b52 BH |
1424 | efx->n_rx_channels : efx_vf_size(efx)); |
1425 | ||
64d8ad6d | 1426 | return 0; |
8ceee660 BH |
1427 | } |
1428 | ||
261e4d96 | 1429 | static int efx_soft_enable_interrupts(struct efx_nic *efx) |
9f2cb71c | 1430 | { |
261e4d96 JC |
1431 | struct efx_channel *channel, *end_channel; |
1432 | int rc; | |
9f2cb71c | 1433 | |
8b7325b4 BH |
1434 | BUG_ON(efx->state == STATE_DISABLED); |
1435 | ||
d8291187 BH |
1436 | efx->irq_soft_enabled = true; |
1437 | smp_wmb(); | |
9f2cb71c BH |
1438 | |
1439 | efx_for_each_channel(channel, efx) { | |
261e4d96 JC |
1440 | if (!channel->type->keep_eventq) { |
1441 | rc = efx_init_eventq(channel); | |
1442 | if (rc) | |
1443 | goto fail; | |
1444 | } | |
9f2cb71c BH |
1445 | efx_start_eventq(channel); |
1446 | } | |
1447 | ||
1448 | efx_mcdi_mode_event(efx); | |
261e4d96 JC |
1449 | |
1450 | return 0; | |
1451 | fail: | |
1452 | end_channel = channel; | |
1453 | efx_for_each_channel(channel, efx) { | |
1454 | if (channel == end_channel) | |
1455 | break; | |
1456 | efx_stop_eventq(channel); | |
1457 | if (!channel->type->keep_eventq) | |
1458 | efx_fini_eventq(channel); | |
1459 | } | |
1460 | ||
1461 | return rc; | |
9f2cb71c BH |
1462 | } |
1463 | ||
d8291187 | 1464 | static void efx_soft_disable_interrupts(struct efx_nic *efx) |
9f2cb71c BH |
1465 | { |
1466 | struct efx_channel *channel; | |
1467 | ||
8b7325b4 BH |
1468 | if (efx->state == STATE_DISABLED) |
1469 | return; | |
1470 | ||
9f2cb71c BH |
1471 | efx_mcdi_mode_poll(efx); |
1472 | ||
d8291187 BH |
1473 | efx->irq_soft_enabled = false; |
1474 | smp_wmb(); | |
1475 | ||
1476 | if (efx->legacy_irq) | |
9f2cb71c | 1477 | synchronize_irq(efx->legacy_irq); |
9f2cb71c BH |
1478 | |
1479 | efx_for_each_channel(channel, efx) { | |
1480 | if (channel->irq) | |
1481 | synchronize_irq(channel->irq); | |
1482 | ||
1483 | efx_stop_eventq(channel); | |
d8291187 | 1484 | if (!channel->type->keep_eventq) |
7f967c01 | 1485 | efx_fini_eventq(channel); |
9f2cb71c | 1486 | } |
cade715f BH |
1487 | |
1488 | /* Flush the asynchronous MCDI request queue */ | |
1489 | efx_mcdi_flush_async(efx); | |
9f2cb71c BH |
1490 | } |
1491 | ||
261e4d96 | 1492 | static int efx_enable_interrupts(struct efx_nic *efx) |
d8291187 | 1493 | { |
261e4d96 JC |
1494 | struct efx_channel *channel, *end_channel; |
1495 | int rc; | |
d8291187 BH |
1496 | |
1497 | BUG_ON(efx->state == STATE_DISABLED); | |
1498 | ||
1499 | if (efx->eeh_disabled_legacy_irq) { | |
1500 | enable_irq(efx->legacy_irq); | |
1501 | efx->eeh_disabled_legacy_irq = false; | |
1502 | } | |
1503 | ||
86094f7f | 1504 | efx->type->irq_enable_master(efx); |
d8291187 BH |
1505 | |
1506 | efx_for_each_channel(channel, efx) { | |
261e4d96 JC |
1507 | if (channel->type->keep_eventq) { |
1508 | rc = efx_init_eventq(channel); | |
1509 | if (rc) | |
1510 | goto fail; | |
1511 | } | |
1512 | } | |
1513 | ||
1514 | rc = efx_soft_enable_interrupts(efx); | |
1515 | if (rc) | |
1516 | goto fail; | |
1517 | ||
1518 | return 0; | |
1519 | ||
1520 | fail: | |
1521 | end_channel = channel; | |
1522 | efx_for_each_channel(channel, efx) { | |
1523 | if (channel == end_channel) | |
1524 | break; | |
d8291187 | 1525 | if (channel->type->keep_eventq) |
261e4d96 | 1526 | efx_fini_eventq(channel); |
d8291187 BH |
1527 | } |
1528 | ||
261e4d96 JC |
1529 | efx->type->irq_disable_non_ev(efx); |
1530 | ||
1531 | return rc; | |
d8291187 BH |
1532 | } |
1533 | ||
1534 | static void efx_disable_interrupts(struct efx_nic *efx) | |
1535 | { | |
1536 | struct efx_channel *channel; | |
1537 | ||
1538 | efx_soft_disable_interrupts(efx); | |
1539 | ||
1540 | efx_for_each_channel(channel, efx) { | |
1541 | if (channel->type->keep_eventq) | |
1542 | efx_fini_eventq(channel); | |
1543 | } | |
1544 | ||
86094f7f | 1545 | efx->type->irq_disable_non_ev(efx); |
d8291187 BH |
1546 | } |
1547 | ||
8ceee660 BH |
1548 | static void efx_remove_interrupts(struct efx_nic *efx) |
1549 | { | |
1550 | struct efx_channel *channel; | |
1551 | ||
1552 | /* Remove MSI/MSI-X interrupts */ | |
64ee3120 | 1553 | efx_for_each_channel(channel, efx) |
8ceee660 BH |
1554 | channel->irq = 0; |
1555 | pci_disable_msi(efx->pci_dev); | |
1556 | pci_disable_msix(efx->pci_dev); | |
1557 | ||
1558 | /* Remove legacy interrupt */ | |
1559 | efx->legacy_irq = 0; | |
1560 | } | |
1561 | ||
8831da7b | 1562 | static void efx_set_channels(struct efx_nic *efx) |
8ceee660 | 1563 | { |
602a5322 BH |
1564 | struct efx_channel *channel; |
1565 | struct efx_tx_queue *tx_queue; | |
1566 | ||
97653431 | 1567 | efx->tx_channel_offset = |
a4900ac9 | 1568 | separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0; |
602a5322 | 1569 | |
79d68b37 SH |
1570 | /* We need to mark which channels really have RX and TX |
1571 | * queues, and adjust the TX queue numbers if we have separate | |
602a5322 BH |
1572 | * RX-only and TX-only channels. |
1573 | */ | |
1574 | efx_for_each_channel(channel, efx) { | |
79d68b37 SH |
1575 | if (channel->channel < efx->n_rx_channels) |
1576 | channel->rx_queue.core_index = channel->channel; | |
1577 | else | |
1578 | channel->rx_queue.core_index = -1; | |
1579 | ||
602a5322 BH |
1580 | efx_for_each_channel_tx_queue(tx_queue, channel) |
1581 | tx_queue->queue -= (efx->tx_channel_offset * | |
1582 | EFX_TXQ_TYPES); | |
1583 | } | |
8ceee660 BH |
1584 | } |
1585 | ||
1586 | static int efx_probe_nic(struct efx_nic *efx) | |
1587 | { | |
765c9f46 | 1588 | size_t i; |
8ceee660 BH |
1589 | int rc; |
1590 | ||
62776d03 | 1591 | netif_dbg(efx, probe, efx->net_dev, "creating NIC\n"); |
8ceee660 BH |
1592 | |
1593 | /* Carry out hardware-type specific initialisation */ | |
ef2b90ee | 1594 | rc = efx->type->probe(efx); |
8ceee660 BH |
1595 | if (rc) |
1596 | return rc; | |
1597 | ||
a4900ac9 | 1598 | /* Determine the number of channels and queues by trying to hook |
8ceee660 | 1599 | * in MSI-X interrupts. */ |
64d8ad6d BH |
1600 | rc = efx_probe_interrupts(efx); |
1601 | if (rc) | |
c15eed22 | 1602 | goto fail1; |
8ceee660 | 1603 | |
c15eed22 BH |
1604 | rc = efx->type->dimension_resources(efx); |
1605 | if (rc) | |
1606 | goto fail2; | |
28e47c49 | 1607 | |
5d3a6fca BH |
1608 | if (efx->n_channels > 1) |
1609 | get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key)); | |
765c9f46 | 1610 | for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++) |
278bc429 | 1611 | efx->rx_indir_table[i] = |
cd2d5b52 | 1612 | ethtool_rxfh_indir_default(i, efx->rss_spread); |
5d3a6fca | 1613 | |
8831da7b | 1614 | efx_set_channels(efx); |
c4f4adc7 BH |
1615 | netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels); |
1616 | netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels); | |
8ceee660 BH |
1617 | |
1618 | /* Initialise the interrupt moderation settings */ | |
9e393b30 BH |
1619 | efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true, |
1620 | true); | |
8ceee660 BH |
1621 | |
1622 | return 0; | |
64d8ad6d | 1623 | |
c15eed22 BH |
1624 | fail2: |
1625 | efx_remove_interrupts(efx); | |
1626 | fail1: | |
64d8ad6d BH |
1627 | efx->type->remove(efx); |
1628 | return rc; | |
8ceee660 BH |
1629 | } |
1630 | ||
1631 | static void efx_remove_nic(struct efx_nic *efx) | |
1632 | { | |
62776d03 | 1633 | netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n"); |
8ceee660 BH |
1634 | |
1635 | efx_remove_interrupts(efx); | |
ef2b90ee | 1636 | efx->type->remove(efx); |
8ceee660 BH |
1637 | } |
1638 | ||
add72477 BH |
1639 | static int efx_probe_filters(struct efx_nic *efx) |
1640 | { | |
1641 | int rc; | |
1642 | ||
1643 | spin_lock_init(&efx->filter_lock); | |
1644 | ||
1645 | rc = efx->type->filter_table_probe(efx); | |
1646 | if (rc) | |
1647 | return rc; | |
1648 | ||
1649 | #ifdef CONFIG_RFS_ACCEL | |
1650 | if (efx->type->offload_features & NETIF_F_NTUPLE) { | |
1651 | efx->rps_flow_id = kcalloc(efx->type->max_rx_ip_filters, | |
1652 | sizeof(*efx->rps_flow_id), | |
1653 | GFP_KERNEL); | |
1654 | if (!efx->rps_flow_id) { | |
1655 | efx->type->filter_table_remove(efx); | |
1656 | return -ENOMEM; | |
1657 | } | |
1658 | } | |
1659 | #endif | |
1660 | ||
1661 | return 0; | |
1662 | } | |
1663 | ||
1664 | static void efx_remove_filters(struct efx_nic *efx) | |
1665 | { | |
1666 | #ifdef CONFIG_RFS_ACCEL | |
1667 | kfree(efx->rps_flow_id); | |
1668 | #endif | |
1669 | efx->type->filter_table_remove(efx); | |
1670 | } | |
1671 | ||
1672 | static void efx_restore_filters(struct efx_nic *efx) | |
1673 | { | |
1674 | efx->type->filter_table_restore(efx); | |
1675 | } | |
1676 | ||
8ceee660 BH |
1677 | /************************************************************************** |
1678 | * | |
1679 | * NIC startup/shutdown | |
1680 | * | |
1681 | *************************************************************************/ | |
1682 | ||
1683 | static int efx_probe_all(struct efx_nic *efx) | |
1684 | { | |
8ceee660 BH |
1685 | int rc; |
1686 | ||
8ceee660 BH |
1687 | rc = efx_probe_nic(efx); |
1688 | if (rc) { | |
62776d03 | 1689 | netif_err(efx, probe, efx->net_dev, "failed to create NIC\n"); |
8ceee660 BH |
1690 | goto fail1; |
1691 | } | |
1692 | ||
8ceee660 BH |
1693 | rc = efx_probe_port(efx); |
1694 | if (rc) { | |
62776d03 | 1695 | netif_err(efx, probe, efx->net_dev, "failed to create port\n"); |
8ceee660 BH |
1696 | goto fail2; |
1697 | } | |
1698 | ||
7e6d06f0 BH |
1699 | BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT); |
1700 | if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) { | |
1701 | rc = -EINVAL; | |
1702 | goto fail3; | |
1703 | } | |
ecc910f5 | 1704 | efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE; |
8ceee660 | 1705 | |
64eebcfd BH |
1706 | rc = efx_probe_filters(efx); |
1707 | if (rc) { | |
1708 | netif_err(efx, probe, efx->net_dev, | |
1709 | "failed to create filter tables\n"); | |
7f967c01 | 1710 | goto fail3; |
64eebcfd BH |
1711 | } |
1712 | ||
7f967c01 BH |
1713 | rc = efx_probe_channels(efx); |
1714 | if (rc) | |
1715 | goto fail4; | |
1716 | ||
8ceee660 BH |
1717 | return 0; |
1718 | ||
64eebcfd | 1719 | fail4: |
7f967c01 | 1720 | efx_remove_filters(efx); |
8ceee660 | 1721 | fail3: |
8ceee660 BH |
1722 | efx_remove_port(efx); |
1723 | fail2: | |
1724 | efx_remove_nic(efx); | |
1725 | fail1: | |
1726 | return rc; | |
1727 | } | |
1728 | ||
8b7325b4 BH |
1729 | /* If the interface is supposed to be running but is not, start |
1730 | * the hardware and software data path, regular activity for the port | |
1731 | * (MAC statistics, link polling, etc.) and schedule the port to be | |
1732 | * reconfigured. Interrupts must already be enabled. This function | |
1733 | * is safe to call multiple times, so long as the NIC is not disabled. | |
1734 | * Requires the RTNL lock. | |
9f2cb71c | 1735 | */ |
8ceee660 BH |
1736 | static void efx_start_all(struct efx_nic *efx) |
1737 | { | |
8ceee660 | 1738 | EFX_ASSERT_RESET_SERIALISED(efx); |
8b7325b4 | 1739 | BUG_ON(efx->state == STATE_DISABLED); |
8ceee660 BH |
1740 | |
1741 | /* Check that it is appropriate to restart the interface. All | |
1742 | * of these flags are safe to read under just the rtnl lock */ | |
8b7325b4 | 1743 | if (efx->port_enabled || !netif_running(efx->net_dev)) |
8ceee660 BH |
1744 | return; |
1745 | ||
8ceee660 | 1746 | efx_start_port(efx); |
9f2cb71c | 1747 | efx_start_datapath(efx); |
8880f4ec | 1748 | |
626950db AR |
1749 | /* Start the hardware monitor if there is one */ |
1750 | if (efx->type->monitor != NULL) | |
8ceee660 BH |
1751 | queue_delayed_work(efx->workqueue, &efx->monitor_work, |
1752 | efx_monitor_interval); | |
626950db AR |
1753 | |
1754 | /* If link state detection is normally event-driven, we have | |
1755 | * to poll now because we could have missed a change | |
1756 | */ | |
1757 | if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) { | |
78c1f0a0 SH |
1758 | mutex_lock(&efx->mac_lock); |
1759 | if (efx->phy_op->poll(efx)) | |
1760 | efx_link_status_changed(efx); | |
1761 | mutex_unlock(&efx->mac_lock); | |
1762 | } | |
55edc6e6 | 1763 | |
ef2b90ee | 1764 | efx->type->start_stats(efx); |
f8f3b5ae JC |
1765 | efx->type->pull_stats(efx); |
1766 | spin_lock_bh(&efx->stats_lock); | |
1767 | efx->type->update_stats(efx, NULL, NULL); | |
1768 | spin_unlock_bh(&efx->stats_lock); | |
8ceee660 BH |
1769 | } |
1770 | ||
8b7325b4 BH |
1771 | /* Quiesce the hardware and software data path, and regular activity |
1772 | * for the port without bringing the link down. Safe to call multiple | |
1773 | * times with the NIC in almost any state, but interrupts should be | |
1774 | * enabled. Requires the RTNL lock. | |
1775 | */ | |
8ceee660 BH |
1776 | static void efx_stop_all(struct efx_nic *efx) |
1777 | { | |
8ceee660 BH |
1778 | EFX_ASSERT_RESET_SERIALISED(efx); |
1779 | ||
1780 | /* port_enabled can be read safely under the rtnl lock */ | |
1781 | if (!efx->port_enabled) | |
1782 | return; | |
1783 | ||
f8f3b5ae JC |
1784 | /* update stats before we go down so we can accurately count |
1785 | * rx_nodesc_drops | |
1786 | */ | |
1787 | efx->type->pull_stats(efx); | |
1788 | spin_lock_bh(&efx->stats_lock); | |
1789 | efx->type->update_stats(efx, NULL, NULL); | |
1790 | spin_unlock_bh(&efx->stats_lock); | |
ef2b90ee | 1791 | efx->type->stop_stats(efx); |
8ceee660 BH |
1792 | efx_stop_port(efx); |
1793 | ||
29c69a48 BH |
1794 | /* Stop the kernel transmit interface. This is only valid if |
1795 | * the device is stopped or detached; otherwise the watchdog | |
1796 | * may fire immediately. | |
1797 | */ | |
1798 | WARN_ON(netif_running(efx->net_dev) && | |
1799 | netif_device_present(efx->net_dev)); | |
9f2cb71c BH |
1800 | netif_tx_disable(efx->net_dev); |
1801 | ||
1802 | efx_stop_datapath(efx); | |
8ceee660 BH |
1803 | } |
1804 | ||
1805 | static void efx_remove_all(struct efx_nic *efx) | |
1806 | { | |
4642610c | 1807 | efx_remove_channels(efx); |
7f967c01 | 1808 | efx_remove_filters(efx); |
8ceee660 BH |
1809 | efx_remove_port(efx); |
1810 | efx_remove_nic(efx); | |
1811 | } | |
1812 | ||
8ceee660 BH |
1813 | /************************************************************************** |
1814 | * | |
1815 | * Interrupt moderation | |
1816 | * | |
1817 | **************************************************************************/ | |
1818 | ||
cc180b69 | 1819 | static unsigned int irq_mod_ticks(unsigned int usecs, unsigned int quantum_ns) |
0d86ebd8 | 1820 | { |
b548f976 BH |
1821 | if (usecs == 0) |
1822 | return 0; | |
cc180b69 | 1823 | if (usecs * 1000 < quantum_ns) |
0d86ebd8 | 1824 | return 1; /* never round down to 0 */ |
cc180b69 | 1825 | return usecs * 1000 / quantum_ns; |
0d86ebd8 BH |
1826 | } |
1827 | ||
8ceee660 | 1828 | /* Set interrupt moderation parameters */ |
9e393b30 BH |
1829 | int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs, |
1830 | unsigned int rx_usecs, bool rx_adaptive, | |
1831 | bool rx_may_override_tx) | |
8ceee660 | 1832 | { |
f7d12cdc | 1833 | struct efx_channel *channel; |
cc180b69 BH |
1834 | unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max * |
1835 | efx->timer_quantum_ns, | |
1836 | 1000); | |
1837 | unsigned int tx_ticks; | |
1838 | unsigned int rx_ticks; | |
8ceee660 BH |
1839 | |
1840 | EFX_ASSERT_RESET_SERIALISED(efx); | |
1841 | ||
cc180b69 | 1842 | if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max) |
9e393b30 BH |
1843 | return -EINVAL; |
1844 | ||
cc180b69 BH |
1845 | tx_ticks = irq_mod_ticks(tx_usecs, efx->timer_quantum_ns); |
1846 | rx_ticks = irq_mod_ticks(rx_usecs, efx->timer_quantum_ns); | |
1847 | ||
9e393b30 BH |
1848 | if (tx_ticks != rx_ticks && efx->tx_channel_offset == 0 && |
1849 | !rx_may_override_tx) { | |
1850 | netif_err(efx, drv, efx->net_dev, "Channels are shared. " | |
1851 | "RX and TX IRQ moderation must be equal\n"); | |
1852 | return -EINVAL; | |
1853 | } | |
1854 | ||
6fb70fd1 | 1855 | efx->irq_rx_adaptive = rx_adaptive; |
0d86ebd8 | 1856 | efx->irq_rx_moderation = rx_ticks; |
f7d12cdc | 1857 | efx_for_each_channel(channel, efx) { |
525da907 | 1858 | if (efx_channel_has_rx_queue(channel)) |
f7d12cdc | 1859 | channel->irq_moderation = rx_ticks; |
525da907 | 1860 | else if (efx_channel_has_tx_queues(channel)) |
f7d12cdc BH |
1861 | channel->irq_moderation = tx_ticks; |
1862 | } | |
9e393b30 BH |
1863 | |
1864 | return 0; | |
8ceee660 BH |
1865 | } |
1866 | ||
a0c4faf5 BH |
1867 | void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs, |
1868 | unsigned int *rx_usecs, bool *rx_adaptive) | |
1869 | { | |
cc180b69 BH |
1870 | /* We must round up when converting ticks to microseconds |
1871 | * because we round down when converting the other way. | |
1872 | */ | |
1873 | ||
a0c4faf5 | 1874 | *rx_adaptive = efx->irq_rx_adaptive; |
cc180b69 BH |
1875 | *rx_usecs = DIV_ROUND_UP(efx->irq_rx_moderation * |
1876 | efx->timer_quantum_ns, | |
1877 | 1000); | |
a0c4faf5 BH |
1878 | |
1879 | /* If channels are shared between RX and TX, so is IRQ | |
1880 | * moderation. Otherwise, IRQ moderation is the same for all | |
1881 | * TX channels and is not adaptive. | |
1882 | */ | |
1883 | if (efx->tx_channel_offset == 0) | |
1884 | *tx_usecs = *rx_usecs; | |
1885 | else | |
cc180b69 | 1886 | *tx_usecs = DIV_ROUND_UP( |
a0c4faf5 | 1887 | efx->channel[efx->tx_channel_offset]->irq_moderation * |
cc180b69 BH |
1888 | efx->timer_quantum_ns, |
1889 | 1000); | |
a0c4faf5 BH |
1890 | } |
1891 | ||
8ceee660 BH |
1892 | /************************************************************************** |
1893 | * | |
1894 | * Hardware monitor | |
1895 | * | |
1896 | **************************************************************************/ | |
1897 | ||
e254c274 | 1898 | /* Run periodically off the general workqueue */ |
8ceee660 BH |
1899 | static void efx_monitor(struct work_struct *data) |
1900 | { | |
1901 | struct efx_nic *efx = container_of(data, struct efx_nic, | |
1902 | monitor_work.work); | |
8ceee660 | 1903 | |
62776d03 BH |
1904 | netif_vdbg(efx, timer, efx->net_dev, |
1905 | "hardware monitor executing on CPU %d\n", | |
1906 | raw_smp_processor_id()); | |
ef2b90ee | 1907 | BUG_ON(efx->type->monitor == NULL); |
8ceee660 | 1908 | |
8ceee660 BH |
1909 | /* If the mac_lock is already held then it is likely a port |
1910 | * reconfiguration is already in place, which will likely do | |
e254c274 BH |
1911 | * most of the work of monitor() anyway. */ |
1912 | if (mutex_trylock(&efx->mac_lock)) { | |
1913 | if (efx->port_enabled) | |
1914 | efx->type->monitor(efx); | |
1915 | mutex_unlock(&efx->mac_lock); | |
1916 | } | |
8ceee660 | 1917 | |
8ceee660 BH |
1918 | queue_delayed_work(efx->workqueue, &efx->monitor_work, |
1919 | efx_monitor_interval); | |
1920 | } | |
1921 | ||
1922 | /************************************************************************** | |
1923 | * | |
1924 | * ioctls | |
1925 | * | |
1926 | *************************************************************************/ | |
1927 | ||
1928 | /* Net device ioctl | |
1929 | * Context: process, rtnl_lock() held. | |
1930 | */ | |
1931 | static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd) | |
1932 | { | |
767e468c | 1933 | struct efx_nic *efx = netdev_priv(net_dev); |
68e7f45e | 1934 | struct mii_ioctl_data *data = if_mii(ifr); |
8ceee660 | 1935 | |
7c236c43 | 1936 | if (cmd == SIOCSHWTSTAMP) |
433dc9b3 BH |
1937 | return efx_ptp_set_ts_config(efx, ifr); |
1938 | if (cmd == SIOCGHWTSTAMP) | |
1939 | return efx_ptp_get_ts_config(efx, ifr); | |
7c236c43 | 1940 | |
68e7f45e BH |
1941 | /* Convert phy_id from older PRTAD/DEVAD format */ |
1942 | if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) && | |
1943 | (data->phy_id & 0xfc00) == 0x0400) | |
1944 | data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400; | |
1945 | ||
1946 | return mdio_mii_ioctl(&efx->mdio, data, cmd); | |
8ceee660 BH |
1947 | } |
1948 | ||
1949 | /************************************************************************** | |
1950 | * | |
1951 | * NAPI interface | |
1952 | * | |
1953 | **************************************************************************/ | |
1954 | ||
7f967c01 BH |
1955 | static void efx_init_napi_channel(struct efx_channel *channel) |
1956 | { | |
1957 | struct efx_nic *efx = channel->efx; | |
1958 | ||
1959 | channel->napi_dev = efx->net_dev; | |
1960 | netif_napi_add(channel->napi_dev, &channel->napi_str, | |
1961 | efx_poll, napi_weight); | |
1962 | } | |
1963 | ||
e8f14992 | 1964 | static void efx_init_napi(struct efx_nic *efx) |
8ceee660 BH |
1965 | { |
1966 | struct efx_channel *channel; | |
8ceee660 | 1967 | |
7f967c01 BH |
1968 | efx_for_each_channel(channel, efx) |
1969 | efx_init_napi_channel(channel); | |
e8f14992 BH |
1970 | } |
1971 | ||
1972 | static void efx_fini_napi_channel(struct efx_channel *channel) | |
1973 | { | |
1974 | if (channel->napi_dev) | |
1975 | netif_napi_del(&channel->napi_str); | |
1976 | channel->napi_dev = NULL; | |
8ceee660 BH |
1977 | } |
1978 | ||
1979 | static void efx_fini_napi(struct efx_nic *efx) | |
1980 | { | |
1981 | struct efx_channel *channel; | |
1982 | ||
e8f14992 BH |
1983 | efx_for_each_channel(channel, efx) |
1984 | efx_fini_napi_channel(channel); | |
8ceee660 BH |
1985 | } |
1986 | ||
1987 | /************************************************************************** | |
1988 | * | |
1989 | * Kernel netpoll interface | |
1990 | * | |
1991 | *************************************************************************/ | |
1992 | ||
1993 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1994 | ||
1995 | /* Although in the common case interrupts will be disabled, this is not | |
1996 | * guaranteed. However, all our work happens inside the NAPI callback, | |
1997 | * so no locking is required. | |
1998 | */ | |
1999 | static void efx_netpoll(struct net_device *net_dev) | |
2000 | { | |
767e468c | 2001 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 BH |
2002 | struct efx_channel *channel; |
2003 | ||
64ee3120 | 2004 | efx_for_each_channel(channel, efx) |
8ceee660 BH |
2005 | efx_schedule_channel(channel); |
2006 | } | |
2007 | ||
2008 | #endif | |
2009 | ||
2010 | /************************************************************************** | |
2011 | * | |
2012 | * Kernel net device interface | |
2013 | * | |
2014 | *************************************************************************/ | |
2015 | ||
2016 | /* Context: process, rtnl_lock() held. */ | |
2017 | static int efx_net_open(struct net_device *net_dev) | |
2018 | { | |
767e468c | 2019 | struct efx_nic *efx = netdev_priv(net_dev); |
8b7325b4 BH |
2020 | int rc; |
2021 | ||
62776d03 BH |
2022 | netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n", |
2023 | raw_smp_processor_id()); | |
8ceee660 | 2024 | |
8b7325b4 BH |
2025 | rc = efx_check_disabled(efx); |
2026 | if (rc) | |
2027 | return rc; | |
f8b87c17 BH |
2028 | if (efx->phy_mode & PHY_MODE_SPECIAL) |
2029 | return -EBUSY; | |
8880f4ec BH |
2030 | if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL)) |
2031 | return -EIO; | |
f8b87c17 | 2032 | |
78c1f0a0 SH |
2033 | /* Notify the kernel of the link state polled during driver load, |
2034 | * before the monitor starts running */ | |
2035 | efx_link_status_changed(efx); | |
2036 | ||
8ceee660 | 2037 | efx_start_all(efx); |
dd40781e | 2038 | efx_selftest_async_start(efx); |
8ceee660 BH |
2039 | return 0; |
2040 | } | |
2041 | ||
2042 | /* Context: process, rtnl_lock() held. | |
2043 | * Note that the kernel will ignore our return code; this method | |
2044 | * should really be a void. | |
2045 | */ | |
2046 | static int efx_net_stop(struct net_device *net_dev) | |
2047 | { | |
767e468c | 2048 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 | 2049 | |
62776d03 BH |
2050 | netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n", |
2051 | raw_smp_processor_id()); | |
8ceee660 | 2052 | |
8b7325b4 BH |
2053 | /* Stop the device and flush all the channels */ |
2054 | efx_stop_all(efx); | |
8ceee660 BH |
2055 | |
2056 | return 0; | |
2057 | } | |
2058 | ||
5b9e207c | 2059 | /* Context: process, dev_base_lock or RTNL held, non-blocking. */ |
2aa9ef11 BH |
2060 | static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev, |
2061 | struct rtnl_link_stats64 *stats) | |
8ceee660 | 2062 | { |
767e468c | 2063 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 | 2064 | |
55edc6e6 | 2065 | spin_lock_bh(&efx->stats_lock); |
cd0ecc9a | 2066 | efx->type->update_stats(efx, NULL, stats); |
1cb34522 BH |
2067 | spin_unlock_bh(&efx->stats_lock); |
2068 | ||
8ceee660 BH |
2069 | return stats; |
2070 | } | |
2071 | ||
2072 | /* Context: netif_tx_lock held, BHs disabled. */ | |
2073 | static void efx_watchdog(struct net_device *net_dev) | |
2074 | { | |
767e468c | 2075 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 | 2076 | |
62776d03 BH |
2077 | netif_err(efx, tx_err, efx->net_dev, |
2078 | "TX stuck with port_enabled=%d: resetting channels\n", | |
2079 | efx->port_enabled); | |
8ceee660 | 2080 | |
739bb23d | 2081 | efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG); |
8ceee660 BH |
2082 | } |
2083 | ||
2084 | ||
2085 | /* Context: process, rtnl_lock() held. */ | |
2086 | static int efx_change_mtu(struct net_device *net_dev, int new_mtu) | |
2087 | { | |
767e468c | 2088 | struct efx_nic *efx = netdev_priv(net_dev); |
8b7325b4 | 2089 | int rc; |
8ceee660 | 2090 | |
8b7325b4 BH |
2091 | rc = efx_check_disabled(efx); |
2092 | if (rc) | |
2093 | return rc; | |
8ceee660 BH |
2094 | if (new_mtu > EFX_MAX_MTU) |
2095 | return -EINVAL; | |
2096 | ||
62776d03 | 2097 | netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu); |
8ceee660 | 2098 | |
29c69a48 BH |
2099 | efx_device_detach_sync(efx); |
2100 | efx_stop_all(efx); | |
2101 | ||
d3245b28 | 2102 | mutex_lock(&efx->mac_lock); |
8ceee660 | 2103 | net_dev->mtu = new_mtu; |
710b208d | 2104 | efx->type->reconfigure_mac(efx); |
d3245b28 BH |
2105 | mutex_unlock(&efx->mac_lock); |
2106 | ||
8ceee660 | 2107 | efx_start_all(efx); |
29c69a48 | 2108 | netif_device_attach(efx->net_dev); |
6c8eef4a | 2109 | return 0; |
8ceee660 BH |
2110 | } |
2111 | ||
2112 | static int efx_set_mac_address(struct net_device *net_dev, void *data) | |
2113 | { | |
767e468c | 2114 | struct efx_nic *efx = netdev_priv(net_dev); |
8ceee660 | 2115 | struct sockaddr *addr = data; |
e0b3ae30 | 2116 | u8 *new_addr = addr->sa_data; |
8ceee660 | 2117 | |
8ceee660 | 2118 | if (!is_valid_ether_addr(new_addr)) { |
62776d03 BH |
2119 | netif_err(efx, drv, efx->net_dev, |
2120 | "invalid ethernet MAC address requested: %pM\n", | |
2121 | new_addr); | |
504f9b5a | 2122 | return -EADDRNOTAVAIL; |
8ceee660 BH |
2123 | } |
2124 | ||
2125 | memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len); | |
cd2d5b52 | 2126 | efx_sriov_mac_address_changed(efx); |
8ceee660 BH |
2127 | |
2128 | /* Reconfigure the MAC */ | |
d3245b28 | 2129 | mutex_lock(&efx->mac_lock); |
710b208d | 2130 | efx->type->reconfigure_mac(efx); |
d3245b28 | 2131 | mutex_unlock(&efx->mac_lock); |
8ceee660 BH |
2132 | |
2133 | return 0; | |
2134 | } | |
2135 | ||
a816f75a | 2136 | /* Context: netif_addr_lock held, BHs disabled. */ |
0fca8c97 | 2137 | static void efx_set_rx_mode(struct net_device *net_dev) |
8ceee660 | 2138 | { |
767e468c | 2139 | struct efx_nic *efx = netdev_priv(net_dev); |
a816f75a | 2140 | |
8be4f3e6 BH |
2141 | if (efx->port_enabled) |
2142 | queue_work(efx->workqueue, &efx->mac_work); | |
2143 | /* Otherwise efx_start_port() will do this */ | |
8ceee660 BH |
2144 | } |
2145 | ||
c8f44aff | 2146 | static int efx_set_features(struct net_device *net_dev, netdev_features_t data) |
abfe9039 BH |
2147 | { |
2148 | struct efx_nic *efx = netdev_priv(net_dev); | |
2149 | ||
2150 | /* If disabling RX n-tuple filtering, clear existing filters */ | |
2151 | if (net_dev->features & ~data & NETIF_F_NTUPLE) | |
fbd79120 | 2152 | return efx->type->filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL); |
abfe9039 BH |
2153 | |
2154 | return 0; | |
2155 | } | |
2156 | ||
8127d661 | 2157 | static const struct net_device_ops efx_farch_netdev_ops = { |
c3ecb9f3 SH |
2158 | .ndo_open = efx_net_open, |
2159 | .ndo_stop = efx_net_stop, | |
4472702e | 2160 | .ndo_get_stats64 = efx_net_stats, |
c3ecb9f3 SH |
2161 | .ndo_tx_timeout = efx_watchdog, |
2162 | .ndo_start_xmit = efx_hard_start_xmit, | |
2163 | .ndo_validate_addr = eth_validate_addr, | |
2164 | .ndo_do_ioctl = efx_ioctl, | |
2165 | .ndo_change_mtu = efx_change_mtu, | |
2166 | .ndo_set_mac_address = efx_set_mac_address, | |
0fca8c97 | 2167 | .ndo_set_rx_mode = efx_set_rx_mode, |
abfe9039 | 2168 | .ndo_set_features = efx_set_features, |
cd2d5b52 BH |
2169 | #ifdef CONFIG_SFC_SRIOV |
2170 | .ndo_set_vf_mac = efx_sriov_set_vf_mac, | |
2171 | .ndo_set_vf_vlan = efx_sriov_set_vf_vlan, | |
2172 | .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk, | |
2173 | .ndo_get_vf_config = efx_sriov_get_vf_config, | |
2174 | #endif | |
c3ecb9f3 SH |
2175 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2176 | .ndo_poll_controller = efx_netpoll, | |
2177 | #endif | |
94b274bf | 2178 | .ndo_setup_tc = efx_setup_tc, |
64d8ad6d BH |
2179 | #ifdef CONFIG_RFS_ACCEL |
2180 | .ndo_rx_flow_steer = efx_filter_rfs, | |
2181 | #endif | |
c3ecb9f3 SH |
2182 | }; |
2183 | ||
8127d661 BH |
2184 | static const struct net_device_ops efx_ef10_netdev_ops = { |
2185 | .ndo_open = efx_net_open, | |
2186 | .ndo_stop = efx_net_stop, | |
2187 | .ndo_get_stats64 = efx_net_stats, | |
2188 | .ndo_tx_timeout = efx_watchdog, | |
2189 | .ndo_start_xmit = efx_hard_start_xmit, | |
2190 | .ndo_validate_addr = eth_validate_addr, | |
2191 | .ndo_do_ioctl = efx_ioctl, | |
2192 | .ndo_change_mtu = efx_change_mtu, | |
2193 | .ndo_set_mac_address = efx_set_mac_address, | |
2194 | .ndo_set_rx_mode = efx_set_rx_mode, | |
2195 | .ndo_set_features = efx_set_features, | |
2196 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2197 | .ndo_poll_controller = efx_netpoll, | |
2198 | #endif | |
2199 | #ifdef CONFIG_RFS_ACCEL | |
2200 | .ndo_rx_flow_steer = efx_filter_rfs, | |
2201 | #endif | |
2202 | }; | |
2203 | ||
7dde596e BH |
2204 | static void efx_update_name(struct efx_nic *efx) |
2205 | { | |
2206 | strcpy(efx->name, efx->net_dev->name); | |
2207 | efx_mtd_rename(efx); | |
2208 | efx_set_channel_names(efx); | |
2209 | } | |
2210 | ||
8ceee660 BH |
2211 | static int efx_netdev_event(struct notifier_block *this, |
2212 | unsigned long event, void *ptr) | |
2213 | { | |
351638e7 | 2214 | struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); |
8ceee660 | 2215 | |
8127d661 BH |
2216 | if ((net_dev->netdev_ops == &efx_farch_netdev_ops || |
2217 | net_dev->netdev_ops == &efx_ef10_netdev_ops) && | |
7dde596e BH |
2218 | event == NETDEV_CHANGENAME) |
2219 | efx_update_name(netdev_priv(net_dev)); | |
8ceee660 BH |
2220 | |
2221 | return NOTIFY_DONE; | |
2222 | } | |
2223 | ||
2224 | static struct notifier_block efx_netdev_notifier = { | |
2225 | .notifier_call = efx_netdev_event, | |
2226 | }; | |
2227 | ||
06d5e193 BH |
2228 | static ssize_t |
2229 | show_phy_type(struct device *dev, struct device_attribute *attr, char *buf) | |
2230 | { | |
2231 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
2232 | return sprintf(buf, "%d\n", efx->phy_type); | |
2233 | } | |
776fbcc9 | 2234 | static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL); |
06d5e193 | 2235 | |
8ceee660 BH |
2236 | static int efx_register_netdev(struct efx_nic *efx) |
2237 | { | |
2238 | struct net_device *net_dev = efx->net_dev; | |
c04bfc6b | 2239 | struct efx_channel *channel; |
8ceee660 BH |
2240 | int rc; |
2241 | ||
2242 | net_dev->watchdog_timeo = 5 * HZ; | |
2243 | net_dev->irq = efx->pci_dev->irq; | |
8127d661 BH |
2244 | if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) { |
2245 | net_dev->netdev_ops = &efx_ef10_netdev_ops; | |
2246 | net_dev->priv_flags |= IFF_UNICAST_FLT; | |
2247 | } else { | |
2248 | net_dev->netdev_ops = &efx_farch_netdev_ops; | |
2249 | } | |
8ceee660 | 2250 | SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops); |
7e6d06f0 | 2251 | net_dev->gso_max_segs = EFX_TSO_MAX_SEGS; |
8ceee660 | 2252 | |
7dde596e | 2253 | rtnl_lock(); |
aed0628d | 2254 | |
7153f623 BH |
2255 | /* Enable resets to be scheduled and check whether any were |
2256 | * already requested. If so, the NIC is probably hosed so we | |
2257 | * abort. | |
2258 | */ | |
2259 | efx->state = STATE_READY; | |
2260 | smp_mb(); /* ensure we change state before checking reset_pending */ | |
2261 | if (efx->reset_pending) { | |
2262 | netif_err(efx, probe, efx->net_dev, | |
2263 | "aborting probe due to scheduled reset\n"); | |
2264 | rc = -EIO; | |
2265 | goto fail_locked; | |
2266 | } | |
2267 | ||
aed0628d BH |
2268 | rc = dev_alloc_name(net_dev, net_dev->name); |
2269 | if (rc < 0) | |
2270 | goto fail_locked; | |
7dde596e | 2271 | efx_update_name(efx); |
aed0628d | 2272 | |
8f8b3d51 BH |
2273 | /* Always start with carrier off; PHY events will detect the link */ |
2274 | netif_carrier_off(net_dev); | |
2275 | ||
aed0628d BH |
2276 | rc = register_netdevice(net_dev); |
2277 | if (rc) | |
2278 | goto fail_locked; | |
2279 | ||
c04bfc6b BH |
2280 | efx_for_each_channel(channel, efx) { |
2281 | struct efx_tx_queue *tx_queue; | |
60031fcc BH |
2282 | efx_for_each_channel_tx_queue(tx_queue, channel) |
2283 | efx_init_tx_queue_core_txq(tx_queue); | |
c04bfc6b BH |
2284 | } |
2285 | ||
0bcf4a64 BH |
2286 | efx_associate(efx); |
2287 | ||
7dde596e | 2288 | rtnl_unlock(); |
8ceee660 | 2289 | |
06d5e193 BH |
2290 | rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type); |
2291 | if (rc) { | |
62776d03 BH |
2292 | netif_err(efx, drv, efx->net_dev, |
2293 | "failed to init net dev attributes\n"); | |
06d5e193 BH |
2294 | goto fail_registered; |
2295 | } | |
2296 | ||
8ceee660 | 2297 | return 0; |
06d5e193 | 2298 | |
7153f623 BH |
2299 | fail_registered: |
2300 | rtnl_lock(); | |
0bcf4a64 | 2301 | efx_dissociate(efx); |
7153f623 | 2302 | unregister_netdevice(net_dev); |
aed0628d | 2303 | fail_locked: |
7153f623 | 2304 | efx->state = STATE_UNINIT; |
aed0628d | 2305 | rtnl_unlock(); |
62776d03 | 2306 | netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); |
aed0628d | 2307 | return rc; |
8ceee660 BH |
2308 | } |
2309 | ||
2310 | static void efx_unregister_netdev(struct efx_nic *efx) | |
2311 | { | |
8ceee660 BH |
2312 | if (!efx->net_dev) |
2313 | return; | |
2314 | ||
767e468c | 2315 | BUG_ON(netdev_priv(efx->net_dev) != efx); |
8ceee660 | 2316 | |
73ba7b68 BH |
2317 | strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name)); |
2318 | device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type); | |
7153f623 BH |
2319 | |
2320 | rtnl_lock(); | |
2321 | unregister_netdevice(efx->net_dev); | |
2322 | efx->state = STATE_UNINIT; | |
2323 | rtnl_unlock(); | |
8ceee660 BH |
2324 | } |
2325 | ||
2326 | /************************************************************************** | |
2327 | * | |
2328 | * Device reset and suspend | |
2329 | * | |
2330 | **************************************************************************/ | |
2331 | ||
2467ca46 BH |
2332 | /* Tears down the entire software state and most of the hardware state |
2333 | * before reset. */ | |
d3245b28 | 2334 | void efx_reset_down(struct efx_nic *efx, enum reset_type method) |
8ceee660 | 2335 | { |
8ceee660 BH |
2336 | EFX_ASSERT_RESET_SERIALISED(efx); |
2337 | ||
2467ca46 | 2338 | efx_stop_all(efx); |
d8291187 | 2339 | efx_disable_interrupts(efx); |
5642ceef BH |
2340 | |
2341 | mutex_lock(&efx->mac_lock); | |
4b988280 SH |
2342 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) |
2343 | efx->phy_op->fini(efx); | |
ef2b90ee | 2344 | efx->type->fini(efx); |
8ceee660 BH |
2345 | } |
2346 | ||
2467ca46 BH |
2347 | /* This function will always ensure that the locks acquired in |
2348 | * efx_reset_down() are released. A failure return code indicates | |
2349 | * that we were unable to reinitialise the hardware, and the | |
2350 | * driver should be disabled. If ok is false, then the rx and tx | |
2351 | * engines are not restarted, pending a RESET_DISABLE. */ | |
d3245b28 | 2352 | int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok) |
8ceee660 BH |
2353 | { |
2354 | int rc; | |
2355 | ||
2467ca46 | 2356 | EFX_ASSERT_RESET_SERIALISED(efx); |
8ceee660 | 2357 | |
ef2b90ee | 2358 | rc = efx->type->init(efx); |
8ceee660 | 2359 | if (rc) { |
62776d03 | 2360 | netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n"); |
eb9f6744 | 2361 | goto fail; |
8ceee660 BH |
2362 | } |
2363 | ||
eb9f6744 BH |
2364 | if (!ok) |
2365 | goto fail; | |
2366 | ||
4b988280 | 2367 | if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) { |
eb9f6744 BH |
2368 | rc = efx->phy_op->init(efx); |
2369 | if (rc) | |
2370 | goto fail; | |
2371 | if (efx->phy_op->reconfigure(efx)) | |
62776d03 BH |
2372 | netif_err(efx, drv, efx->net_dev, |
2373 | "could not restore PHY settings\n"); | |
4b988280 SH |
2374 | } |
2375 | ||
261e4d96 JC |
2376 | rc = efx_enable_interrupts(efx); |
2377 | if (rc) | |
2378 | goto fail; | |
64eebcfd | 2379 | efx_restore_filters(efx); |
cd2d5b52 | 2380 | efx_sriov_reset(efx); |
eb9f6744 | 2381 | |
eb9f6744 BH |
2382 | mutex_unlock(&efx->mac_lock); |
2383 | ||
2384 | efx_start_all(efx); | |
2385 | ||
2386 | return 0; | |
2387 | ||
2388 | fail: | |
2389 | efx->port_initialized = false; | |
2467ca46 BH |
2390 | |
2391 | mutex_unlock(&efx->mac_lock); | |
2392 | ||
8ceee660 BH |
2393 | return rc; |
2394 | } | |
2395 | ||
eb9f6744 BH |
2396 | /* Reset the NIC using the specified method. Note that the reset may |
2397 | * fail, in which case the card will be left in an unusable state. | |
8ceee660 | 2398 | * |
eb9f6744 | 2399 | * Caller must hold the rtnl_lock. |
8ceee660 | 2400 | */ |
eb9f6744 | 2401 | int efx_reset(struct efx_nic *efx, enum reset_type method) |
8ceee660 | 2402 | { |
eb9f6744 BH |
2403 | int rc, rc2; |
2404 | bool disabled; | |
8ceee660 | 2405 | |
62776d03 BH |
2406 | netif_info(efx, drv, efx->net_dev, "resetting (%s)\n", |
2407 | RESET_TYPE(method)); | |
8ceee660 | 2408 | |
c2f3b8e3 | 2409 | efx_device_detach_sync(efx); |
d3245b28 | 2410 | efx_reset_down(efx, method); |
8ceee660 | 2411 | |
ef2b90ee | 2412 | rc = efx->type->reset(efx, method); |
8ceee660 | 2413 | if (rc) { |
62776d03 | 2414 | netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n"); |
eb9f6744 | 2415 | goto out; |
8ceee660 BH |
2416 | } |
2417 | ||
a7d529ae BH |
2418 | /* Clear flags for the scopes we covered. We assume the NIC and |
2419 | * driver are now quiescent so that there is no race here. | |
2420 | */ | |
2421 | efx->reset_pending &= -(1 << (method + 1)); | |
8ceee660 BH |
2422 | |
2423 | /* Reinitialise bus-mastering, which may have been turned off before | |
2424 | * the reset was scheduled. This is still appropriate, even in the | |
2425 | * RESET_TYPE_DISABLE since this driver generally assumes the hardware | |
2426 | * can respond to requests. */ | |
2427 | pci_set_master(efx->pci_dev); | |
2428 | ||
eb9f6744 | 2429 | out: |
8ceee660 | 2430 | /* Leave device stopped if necessary */ |
626950db AR |
2431 | disabled = rc || |
2432 | method == RESET_TYPE_DISABLE || | |
2433 | method == RESET_TYPE_RECOVER_OR_DISABLE; | |
eb9f6744 BH |
2434 | rc2 = efx_reset_up(efx, method, !disabled); |
2435 | if (rc2) { | |
2436 | disabled = true; | |
2437 | if (!rc) | |
2438 | rc = rc2; | |
8ceee660 BH |
2439 | } |
2440 | ||
eb9f6744 | 2441 | if (disabled) { |
f49a4589 | 2442 | dev_close(efx->net_dev); |
62776d03 | 2443 | netif_err(efx, drv, efx->net_dev, "has been disabled\n"); |
f4bd954e | 2444 | efx->state = STATE_DISABLED; |
f4bd954e | 2445 | } else { |
62776d03 | 2446 | netif_dbg(efx, drv, efx->net_dev, "reset complete\n"); |
e4abce85 | 2447 | netif_device_attach(efx->net_dev); |
f4bd954e | 2448 | } |
8ceee660 BH |
2449 | return rc; |
2450 | } | |
2451 | ||
626950db AR |
2452 | /* Try recovery mechanisms. |
2453 | * For now only EEH is supported. | |
2454 | * Returns 0 if the recovery mechanisms are unsuccessful. | |
2455 | * Returns a non-zero value otherwise. | |
2456 | */ | |
b28405b0 | 2457 | int efx_try_recovery(struct efx_nic *efx) |
626950db AR |
2458 | { |
2459 | #ifdef CONFIG_EEH | |
2460 | /* A PCI error can occur and not be seen by EEH because nothing | |
2461 | * happens on the PCI bus. In this case the driver may fail and | |
2462 | * schedule a 'recover or reset', leading to this recovery handler. | |
2463 | * Manually call the eeh failure check function. | |
2464 | */ | |
2465 | struct eeh_dev *eehdev = | |
2466 | of_node_to_eeh_dev(pci_device_to_OF_node(efx->pci_dev)); | |
2467 | ||
2468 | if (eeh_dev_check_failure(eehdev)) { | |
2469 | /* The EEH mechanisms will handle the error and reset the | |
2470 | * device if necessary. | |
2471 | */ | |
2472 | return 1; | |
2473 | } | |
2474 | #endif | |
2475 | return 0; | |
2476 | } | |
2477 | ||
74cd60a4 JC |
2478 | static void efx_wait_for_bist_end(struct efx_nic *efx) |
2479 | { | |
2480 | int i; | |
2481 | ||
2482 | for (i = 0; i < BIST_WAIT_DELAY_COUNT; ++i) { | |
2483 | if (efx_mcdi_poll_reboot(efx)) | |
2484 | goto out; | |
2485 | msleep(BIST_WAIT_DELAY_MS); | |
2486 | } | |
2487 | ||
2488 | netif_err(efx, drv, efx->net_dev, "Warning: No MC reboot after BIST mode\n"); | |
2489 | out: | |
2490 | /* Either way unset the BIST flag. If we found no reboot we probably | |
2491 | * won't recover, but we should try. | |
2492 | */ | |
2493 | efx->mc_bist_for_other_fn = false; | |
2494 | } | |
2495 | ||
8ceee660 BH |
2496 | /* The worker thread exists so that code that cannot sleep can |
2497 | * schedule a reset for later. | |
2498 | */ | |
2499 | static void efx_reset_work(struct work_struct *data) | |
2500 | { | |
eb9f6744 | 2501 | struct efx_nic *efx = container_of(data, struct efx_nic, reset_work); |
626950db AR |
2502 | unsigned long pending; |
2503 | enum reset_type method; | |
2504 | ||
2505 | pending = ACCESS_ONCE(efx->reset_pending); | |
2506 | method = fls(pending) - 1; | |
2507 | ||
74cd60a4 JC |
2508 | if (method == RESET_TYPE_MC_BIST) |
2509 | efx_wait_for_bist_end(efx); | |
2510 | ||
626950db AR |
2511 | if ((method == RESET_TYPE_RECOVER_OR_DISABLE || |
2512 | method == RESET_TYPE_RECOVER_OR_ALL) && | |
2513 | efx_try_recovery(efx)) | |
2514 | return; | |
8ceee660 | 2515 | |
a7d529ae | 2516 | if (!pending) |
319ba649 SH |
2517 | return; |
2518 | ||
eb9f6744 | 2519 | rtnl_lock(); |
7153f623 BH |
2520 | |
2521 | /* We checked the state in efx_schedule_reset() but it may | |
2522 | * have changed by now. Now that we have the RTNL lock, | |
2523 | * it cannot change again. | |
2524 | */ | |
2525 | if (efx->state == STATE_READY) | |
626950db | 2526 | (void)efx_reset(efx, method); |
7153f623 | 2527 | |
eb9f6744 | 2528 | rtnl_unlock(); |
8ceee660 BH |
2529 | } |
2530 | ||
2531 | void efx_schedule_reset(struct efx_nic *efx, enum reset_type type) | |
2532 | { | |
2533 | enum reset_type method; | |
2534 | ||
626950db AR |
2535 | if (efx->state == STATE_RECOVERY) { |
2536 | netif_dbg(efx, drv, efx->net_dev, | |
2537 | "recovering: skip scheduling %s reset\n", | |
2538 | RESET_TYPE(type)); | |
2539 | return; | |
2540 | } | |
2541 | ||
8ceee660 BH |
2542 | switch (type) { |
2543 | case RESET_TYPE_INVISIBLE: | |
2544 | case RESET_TYPE_ALL: | |
626950db | 2545 | case RESET_TYPE_RECOVER_OR_ALL: |
8ceee660 BH |
2546 | case RESET_TYPE_WORLD: |
2547 | case RESET_TYPE_DISABLE: | |
626950db | 2548 | case RESET_TYPE_RECOVER_OR_DISABLE: |
74cd60a4 | 2549 | case RESET_TYPE_MC_BIST: |
8ceee660 | 2550 | method = type; |
0e2a9c7c BH |
2551 | netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n", |
2552 | RESET_TYPE(method)); | |
8ceee660 | 2553 | break; |
8ceee660 | 2554 | default: |
0e2a9c7c | 2555 | method = efx->type->map_reset_reason(type); |
62776d03 BH |
2556 | netif_dbg(efx, drv, efx->net_dev, |
2557 | "scheduling %s reset for %s\n", | |
2558 | RESET_TYPE(method), RESET_TYPE(type)); | |
0e2a9c7c BH |
2559 | break; |
2560 | } | |
8ceee660 | 2561 | |
a7d529ae | 2562 | set_bit(method, &efx->reset_pending); |
7153f623 BH |
2563 | smp_mb(); /* ensure we change reset_pending before checking state */ |
2564 | ||
2565 | /* If we're not READY then just leave the flags set as the cue | |
2566 | * to abort probing or reschedule the reset later. | |
2567 | */ | |
2568 | if (ACCESS_ONCE(efx->state) != STATE_READY) | |
2569 | return; | |
8ceee660 | 2570 | |
8880f4ec BH |
2571 | /* efx_process_channel() will no longer read events once a |
2572 | * reset is scheduled. So switch back to poll'd MCDI completions. */ | |
2573 | efx_mcdi_mode_poll(efx); | |
2574 | ||
1ab00629 | 2575 | queue_work(reset_workqueue, &efx->reset_work); |
8ceee660 BH |
2576 | } |
2577 | ||
2578 | /************************************************************************** | |
2579 | * | |
2580 | * List of NICs we support | |
2581 | * | |
2582 | **************************************************************************/ | |
2583 | ||
2584 | /* PCI device ID table */ | |
a3aa1884 | 2585 | static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = { |
937383a5 BH |
2586 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, |
2587 | PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0), | |
daeda630 | 2588 | .driver_data = (unsigned long) &falcon_a1_nic_type}, |
937383a5 BH |
2589 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, |
2590 | PCI_DEVICE_ID_SOLARFLARE_SFC4000B), | |
daeda630 | 2591 | .driver_data = (unsigned long) &falcon_b0_nic_type}, |
547c474f | 2592 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */ |
8880f4ec | 2593 | .driver_data = (unsigned long) &siena_a0_nic_type}, |
547c474f | 2594 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */ |
8880f4ec | 2595 | .driver_data = (unsigned long) &siena_a0_nic_type}, |
8127d661 BH |
2596 | {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */ |
2597 | .driver_data = (unsigned long) &efx_hunt_a0_nic_type}, | |
8ceee660 BH |
2598 | {0} /* end of list */ |
2599 | }; | |
2600 | ||
2601 | /************************************************************************** | |
2602 | * | |
3759433d | 2603 | * Dummy PHY/MAC operations |
8ceee660 | 2604 | * |
01aad7b6 | 2605 | * Can be used for some unimplemented operations |
8ceee660 BH |
2606 | * Needed so all function pointers are valid and do not have to be tested |
2607 | * before use | |
2608 | * | |
2609 | **************************************************************************/ | |
2610 | int efx_port_dummy_op_int(struct efx_nic *efx) | |
2611 | { | |
2612 | return 0; | |
2613 | } | |
2614 | void efx_port_dummy_op_void(struct efx_nic *efx) {} | |
d215697f | 2615 | |
2616 | static bool efx_port_dummy_op_poll(struct efx_nic *efx) | |
fdaa9aed SH |
2617 | { |
2618 | return false; | |
2619 | } | |
8ceee660 | 2620 | |
6c8c2513 | 2621 | static const struct efx_phy_operations efx_dummy_phy_operations = { |
8ceee660 | 2622 | .init = efx_port_dummy_op_int, |
d3245b28 | 2623 | .reconfigure = efx_port_dummy_op_int, |
fdaa9aed | 2624 | .poll = efx_port_dummy_op_poll, |
8ceee660 | 2625 | .fini = efx_port_dummy_op_void, |
8ceee660 BH |
2626 | }; |
2627 | ||
8ceee660 BH |
2628 | /************************************************************************** |
2629 | * | |
2630 | * Data housekeeping | |
2631 | * | |
2632 | **************************************************************************/ | |
2633 | ||
2634 | /* This zeroes out and then fills in the invariants in a struct | |
2635 | * efx_nic (including all sub-structures). | |
2636 | */ | |
adeb15aa | 2637 | static int efx_init_struct(struct efx_nic *efx, |
8ceee660 BH |
2638 | struct pci_dev *pci_dev, struct net_device *net_dev) |
2639 | { | |
4642610c | 2640 | int i; |
8ceee660 BH |
2641 | |
2642 | /* Initialise common structures */ | |
0bcf4a64 BH |
2643 | INIT_LIST_HEAD(&efx->node); |
2644 | INIT_LIST_HEAD(&efx->secondary_list); | |
8ceee660 | 2645 | spin_lock_init(&efx->biu_lock); |
76884835 BH |
2646 | #ifdef CONFIG_SFC_MTD |
2647 | INIT_LIST_HEAD(&efx->mtd_list); | |
2648 | #endif | |
8ceee660 BH |
2649 | INIT_WORK(&efx->reset_work, efx_reset_work); |
2650 | INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor); | |
dd40781e | 2651 | INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); |
8ceee660 | 2652 | efx->pci_dev = pci_dev; |
62776d03 | 2653 | efx->msg_enable = debug; |
f16aeea0 | 2654 | efx->state = STATE_UNINIT; |
8ceee660 | 2655 | strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name)); |
8ceee660 BH |
2656 | |
2657 | efx->net_dev = net_dev; | |
43a3739d | 2658 | efx->rx_prefix_size = efx->type->rx_prefix_size; |
2ec03014 AR |
2659 | efx->rx_ip_align = |
2660 | NET_IP_ALIGN ? (efx->rx_prefix_size + NET_IP_ALIGN) % 4 : 0; | |
43a3739d JC |
2661 | efx->rx_packet_hash_offset = |
2662 | efx->type->rx_hash_offset - efx->type->rx_prefix_size; | |
bd9a265d JC |
2663 | efx->rx_packet_ts_offset = |
2664 | efx->type->rx_ts_offset - efx->type->rx_prefix_size; | |
8ceee660 BH |
2665 | spin_lock_init(&efx->stats_lock); |
2666 | mutex_init(&efx->mac_lock); | |
2667 | efx->phy_op = &efx_dummy_phy_operations; | |
68e7f45e | 2668 | efx->mdio.dev = net_dev; |
766ca0fa | 2669 | INIT_WORK(&efx->mac_work, efx_mac_work); |
9f2cb71c | 2670 | init_waitqueue_head(&efx->flush_wq); |
8ceee660 BH |
2671 | |
2672 | for (i = 0; i < EFX_MAX_CHANNELS; i++) { | |
4642610c BH |
2673 | efx->channel[i] = efx_alloc_channel(efx, i, NULL); |
2674 | if (!efx->channel[i]) | |
2675 | goto fail; | |
d8291187 BH |
2676 | efx->msi_context[i].efx = efx; |
2677 | efx->msi_context[i].index = i; | |
8ceee660 BH |
2678 | } |
2679 | ||
8ceee660 BH |
2680 | /* Higher numbered interrupt modes are less capable! */ |
2681 | efx->interrupt_mode = max(efx->type->max_interrupt_mode, | |
2682 | interrupt_mode); | |
2683 | ||
6977dc63 BH |
2684 | /* Would be good to use the net_dev name, but we're too early */ |
2685 | snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s", | |
2686 | pci_name(pci_dev)); | |
2687 | efx->workqueue = create_singlethread_workqueue(efx->workqueue_name); | |
1ab00629 | 2688 | if (!efx->workqueue) |
4642610c | 2689 | goto fail; |
8d9853d9 | 2690 | |
8ceee660 | 2691 | return 0; |
4642610c BH |
2692 | |
2693 | fail: | |
2694 | efx_fini_struct(efx); | |
2695 | return -ENOMEM; | |
8ceee660 BH |
2696 | } |
2697 | ||
2698 | static void efx_fini_struct(struct efx_nic *efx) | |
2699 | { | |
8313aca3 BH |
2700 | int i; |
2701 | ||
2702 | for (i = 0; i < EFX_MAX_CHANNELS; i++) | |
2703 | kfree(efx->channel[i]); | |
2704 | ||
ef215e64 BH |
2705 | kfree(efx->vpd_sn); |
2706 | ||
8ceee660 BH |
2707 | if (efx->workqueue) { |
2708 | destroy_workqueue(efx->workqueue); | |
2709 | efx->workqueue = NULL; | |
2710 | } | |
2711 | } | |
2712 | ||
2713 | /************************************************************************** | |
2714 | * | |
2715 | * PCI interface | |
2716 | * | |
2717 | **************************************************************************/ | |
2718 | ||
2719 | /* Main body of final NIC shutdown code | |
2720 | * This is called only at module unload (or hotplug removal). | |
2721 | */ | |
2722 | static void efx_pci_remove_main(struct efx_nic *efx) | |
2723 | { | |
7153f623 BH |
2724 | /* Flush reset_work. It can no longer be scheduled since we |
2725 | * are not READY. | |
2726 | */ | |
2727 | BUG_ON(efx->state == STATE_READY); | |
2728 | cancel_work_sync(&efx->reset_work); | |
2729 | ||
d8291187 | 2730 | efx_disable_interrupts(efx); |
152b6a62 | 2731 | efx_nic_fini_interrupt(efx); |
8ceee660 | 2732 | efx_fini_port(efx); |
ef2b90ee | 2733 | efx->type->fini(efx); |
8ceee660 BH |
2734 | efx_fini_napi(efx); |
2735 | efx_remove_all(efx); | |
2736 | } | |
2737 | ||
2738 | /* Final NIC shutdown | |
2739 | * This is called only at module unload (or hotplug removal). | |
2740 | */ | |
2741 | static void efx_pci_remove(struct pci_dev *pci_dev) | |
2742 | { | |
2743 | struct efx_nic *efx; | |
2744 | ||
2745 | efx = pci_get_drvdata(pci_dev); | |
2746 | if (!efx) | |
2747 | return; | |
2748 | ||
2749 | /* Mark the NIC as fini, then stop the interface */ | |
2750 | rtnl_lock(); | |
0bcf4a64 | 2751 | efx_dissociate(efx); |
8ceee660 | 2752 | dev_close(efx->net_dev); |
d8291187 | 2753 | efx_disable_interrupts(efx); |
8ceee660 BH |
2754 | rtnl_unlock(); |
2755 | ||
cd2d5b52 | 2756 | efx_sriov_fini(efx); |
8ceee660 BH |
2757 | efx_unregister_netdev(efx); |
2758 | ||
7dde596e BH |
2759 | efx_mtd_remove(efx); |
2760 | ||
8ceee660 BH |
2761 | efx_pci_remove_main(efx); |
2762 | ||
8ceee660 | 2763 | efx_fini_io(efx); |
62776d03 | 2764 | netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n"); |
8ceee660 | 2765 | |
8ceee660 BH |
2766 | efx_fini_struct(efx); |
2767 | free_netdev(efx->net_dev); | |
626950db AR |
2768 | |
2769 | pci_disable_pcie_error_reporting(pci_dev); | |
8ceee660 BH |
2770 | }; |
2771 | ||
460eeaa0 BH |
2772 | /* NIC VPD information |
2773 | * Called during probe to display the part number of the | |
2774 | * installed NIC. VPD is potentially very large but this should | |
2775 | * always appear within the first 512 bytes. | |
2776 | */ | |
2777 | #define SFC_VPD_LEN 512 | |
ef215e64 | 2778 | static void efx_probe_vpd_strings(struct efx_nic *efx) |
460eeaa0 BH |
2779 | { |
2780 | struct pci_dev *dev = efx->pci_dev; | |
2781 | char vpd_data[SFC_VPD_LEN]; | |
2782 | ssize_t vpd_size; | |
ef215e64 | 2783 | int ro_start, ro_size, i, j; |
460eeaa0 BH |
2784 | |
2785 | /* Get the vpd data from the device */ | |
2786 | vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data); | |
2787 | if (vpd_size <= 0) { | |
2788 | netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n"); | |
2789 | return; | |
2790 | } | |
2791 | ||
2792 | /* Get the Read only section */ | |
ef215e64 BH |
2793 | ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA); |
2794 | if (ro_start < 0) { | |
460eeaa0 BH |
2795 | netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n"); |
2796 | return; | |
2797 | } | |
2798 | ||
ef215e64 BH |
2799 | ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]); |
2800 | j = ro_size; | |
2801 | i = ro_start + PCI_VPD_LRDT_TAG_SIZE; | |
460eeaa0 BH |
2802 | if (i + j > vpd_size) |
2803 | j = vpd_size - i; | |
2804 | ||
2805 | /* Get the Part number */ | |
2806 | i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN"); | |
2807 | if (i < 0) { | |
2808 | netif_err(efx, drv, efx->net_dev, "Part number not found\n"); | |
2809 | return; | |
2810 | } | |
2811 | ||
2812 | j = pci_vpd_info_field_size(&vpd_data[i]); | |
2813 | i += PCI_VPD_INFO_FLD_HDR_SIZE; | |
2814 | if (i + j > vpd_size) { | |
2815 | netif_err(efx, drv, efx->net_dev, "Incomplete part number\n"); | |
2816 | return; | |
2817 | } | |
2818 | ||
2819 | netif_info(efx, drv, efx->net_dev, | |
2820 | "Part Number : %.*s\n", j, &vpd_data[i]); | |
ef215e64 BH |
2821 | |
2822 | i = ro_start + PCI_VPD_LRDT_TAG_SIZE; | |
2823 | j = ro_size; | |
2824 | i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN"); | |
2825 | if (i < 0) { | |
2826 | netif_err(efx, drv, efx->net_dev, "Serial number not found\n"); | |
2827 | return; | |
2828 | } | |
2829 | ||
2830 | j = pci_vpd_info_field_size(&vpd_data[i]); | |
2831 | i += PCI_VPD_INFO_FLD_HDR_SIZE; | |
2832 | if (i + j > vpd_size) { | |
2833 | netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n"); | |
2834 | return; | |
2835 | } | |
2836 | ||
2837 | efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL); | |
2838 | if (!efx->vpd_sn) | |
2839 | return; | |
2840 | ||
2841 | snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]); | |
460eeaa0 BH |
2842 | } |
2843 | ||
2844 | ||
8ceee660 BH |
2845 | /* Main body of NIC initialisation |
2846 | * This is called at module load (or hotplug insertion, theoretically). | |
2847 | */ | |
2848 | static int efx_pci_probe_main(struct efx_nic *efx) | |
2849 | { | |
2850 | int rc; | |
2851 | ||
2852 | /* Do start-of-day initialisation */ | |
2853 | rc = efx_probe_all(efx); | |
2854 | if (rc) | |
2855 | goto fail1; | |
2856 | ||
e8f14992 | 2857 | efx_init_napi(efx); |
8ceee660 | 2858 | |
ef2b90ee | 2859 | rc = efx->type->init(efx); |
8ceee660 | 2860 | if (rc) { |
62776d03 BH |
2861 | netif_err(efx, probe, efx->net_dev, |
2862 | "failed to initialise NIC\n"); | |
278c0621 | 2863 | goto fail3; |
8ceee660 BH |
2864 | } |
2865 | ||
2866 | rc = efx_init_port(efx); | |
2867 | if (rc) { | |
62776d03 BH |
2868 | netif_err(efx, probe, efx->net_dev, |
2869 | "failed to initialise port\n"); | |
278c0621 | 2870 | goto fail4; |
8ceee660 BH |
2871 | } |
2872 | ||
152b6a62 | 2873 | rc = efx_nic_init_interrupt(efx); |
8ceee660 | 2874 | if (rc) |
278c0621 | 2875 | goto fail5; |
261e4d96 JC |
2876 | rc = efx_enable_interrupts(efx); |
2877 | if (rc) | |
2878 | goto fail6; | |
8ceee660 BH |
2879 | |
2880 | return 0; | |
2881 | ||
261e4d96 JC |
2882 | fail6: |
2883 | efx_nic_fini_interrupt(efx); | |
278c0621 | 2884 | fail5: |
8ceee660 | 2885 | efx_fini_port(efx); |
8ceee660 | 2886 | fail4: |
ef2b90ee | 2887 | efx->type->fini(efx); |
8ceee660 BH |
2888 | fail3: |
2889 | efx_fini_napi(efx); | |
8ceee660 BH |
2890 | efx_remove_all(efx); |
2891 | fail1: | |
2892 | return rc; | |
2893 | } | |
2894 | ||
2895 | /* NIC initialisation | |
2896 | * | |
2897 | * This is called at module load (or hotplug insertion, | |
73ba7b68 | 2898 | * theoretically). It sets up PCI mappings, resets the NIC, |
8ceee660 BH |
2899 | * sets up and registers the network devices with the kernel and hooks |
2900 | * the interrupt service routine. It does not prepare the device for | |
2901 | * transmission; this is left to the first time one of the network | |
2902 | * interfaces is brought up (i.e. efx_net_open). | |
2903 | */ | |
87d1fc11 | 2904 | static int efx_pci_probe(struct pci_dev *pci_dev, |
1dd06ae8 | 2905 | const struct pci_device_id *entry) |
8ceee660 | 2906 | { |
8ceee660 BH |
2907 | struct net_device *net_dev; |
2908 | struct efx_nic *efx; | |
fadac6aa | 2909 | int rc; |
8ceee660 BH |
2910 | |
2911 | /* Allocate and initialise a struct net_device and struct efx_nic */ | |
94b274bf BH |
2912 | net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES, |
2913 | EFX_MAX_RX_QUEUES); | |
8ceee660 BH |
2914 | if (!net_dev) |
2915 | return -ENOMEM; | |
adeb15aa BH |
2916 | efx = netdev_priv(net_dev); |
2917 | efx->type = (const struct efx_nic_type *) entry->driver_data; | |
2918 | net_dev->features |= (efx->type->offload_features | NETIF_F_SG | | |
97bc5415 | 2919 | NETIF_F_HIGHDMA | NETIF_F_TSO | |
abfe9039 | 2920 | NETIF_F_RXCSUM); |
adeb15aa | 2921 | if (efx->type->offload_features & NETIF_F_V6_CSUM) |
738a8f4b | 2922 | net_dev->features |= NETIF_F_TSO6; |
28506563 BH |
2923 | /* Mask for features that also apply to VLAN devices */ |
2924 | net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG | | |
abfe9039 BH |
2925 | NETIF_F_HIGHDMA | NETIF_F_ALL_TSO | |
2926 | NETIF_F_RXCSUM); | |
2927 | /* All offloads can be toggled */ | |
2928 | net_dev->hw_features = net_dev->features & ~NETIF_F_HIGHDMA; | |
8ceee660 | 2929 | pci_set_drvdata(pci_dev, efx); |
62776d03 | 2930 | SET_NETDEV_DEV(net_dev, &pci_dev->dev); |
adeb15aa | 2931 | rc = efx_init_struct(efx, pci_dev, net_dev); |
8ceee660 BH |
2932 | if (rc) |
2933 | goto fail1; | |
2934 | ||
62776d03 | 2935 | netif_info(efx, probe, efx->net_dev, |
ff79c8ac | 2936 | "Solarflare NIC detected\n"); |
8ceee660 | 2937 | |
ef215e64 | 2938 | efx_probe_vpd_strings(efx); |
460eeaa0 | 2939 | |
8ceee660 BH |
2940 | /* Set up basic I/O (BAR mappings etc) */ |
2941 | rc = efx_init_io(efx); | |
2942 | if (rc) | |
2943 | goto fail2; | |
2944 | ||
fadac6aa | 2945 | rc = efx_pci_probe_main(efx); |
fadac6aa BH |
2946 | if (rc) |
2947 | goto fail3; | |
8ceee660 | 2948 | |
8ceee660 BH |
2949 | rc = efx_register_netdev(efx); |
2950 | if (rc) | |
fadac6aa | 2951 | goto fail4; |
8ceee660 | 2952 | |
cd2d5b52 BH |
2953 | rc = efx_sriov_init(efx); |
2954 | if (rc) | |
2955 | netif_err(efx, probe, efx->net_dev, | |
2956 | "SR-IOV can't be enabled rc %d\n", rc); | |
2957 | ||
62776d03 | 2958 | netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n"); |
a5211bb5 | 2959 | |
7c43161c | 2960 | /* Try to create MTDs, but allow this to fail */ |
a5211bb5 | 2961 | rtnl_lock(); |
7c43161c | 2962 | rc = efx_mtd_probe(efx); |
a5211bb5 | 2963 | rtnl_unlock(); |
7c43161c BH |
2964 | if (rc) |
2965 | netif_warn(efx, probe, efx->net_dev, | |
2966 | "failed to create MTDs (%d)\n", rc); | |
2967 | ||
626950db AR |
2968 | rc = pci_enable_pcie_error_reporting(pci_dev); |
2969 | if (rc && rc != -EINVAL) | |
2970 | netif_warn(efx, probe, efx->net_dev, | |
2971 | "pci_enable_pcie_error_reporting failed (%d)\n", rc); | |
2972 | ||
8ceee660 BH |
2973 | return 0; |
2974 | ||
8ceee660 | 2975 | fail4: |
fadac6aa | 2976 | efx_pci_remove_main(efx); |
8ceee660 BH |
2977 | fail3: |
2978 | efx_fini_io(efx); | |
2979 | fail2: | |
2980 | efx_fini_struct(efx); | |
2981 | fail1: | |
5e2a911c | 2982 | WARN_ON(rc > 0); |
62776d03 | 2983 | netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc); |
8ceee660 BH |
2984 | free_netdev(net_dev); |
2985 | return rc; | |
2986 | } | |
2987 | ||
89c758fa BH |
2988 | static int efx_pm_freeze(struct device *dev) |
2989 | { | |
2990 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); | |
2991 | ||
61da026d BH |
2992 | rtnl_lock(); |
2993 | ||
6032fb56 BH |
2994 | if (efx->state != STATE_DISABLED) { |
2995 | efx->state = STATE_UNINIT; | |
89c758fa | 2996 | |
c2f3b8e3 | 2997 | efx_device_detach_sync(efx); |
89c758fa | 2998 | |
6032fb56 | 2999 | efx_stop_all(efx); |
d8291187 | 3000 | efx_disable_interrupts(efx); |
6032fb56 | 3001 | } |
89c758fa | 3002 | |
61da026d BH |
3003 | rtnl_unlock(); |
3004 | ||
89c758fa BH |
3005 | return 0; |
3006 | } | |
3007 | ||
3008 | static int efx_pm_thaw(struct device *dev) | |
3009 | { | |
261e4d96 | 3010 | int rc; |
89c758fa BH |
3011 | struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); |
3012 | ||
61da026d BH |
3013 | rtnl_lock(); |
3014 | ||
6032fb56 | 3015 | if (efx->state != STATE_DISABLED) { |
261e4d96 JC |
3016 | rc = efx_enable_interrupts(efx); |
3017 | if (rc) | |
3018 | goto fail; | |
89c758fa | 3019 | |
6032fb56 BH |
3020 | mutex_lock(&efx->mac_lock); |
3021 | efx->phy_op->reconfigure(efx); | |
3022 | mutex_unlock(&efx->mac_lock); | |
89c758fa | 3023 | |
6032fb56 | 3024 | efx_start_all(efx); |
89c758fa | 3025 | |
6032fb56 | 3026 | netif_device_attach(efx->net_dev); |
89c758fa | 3027 | |
6032fb56 | 3028 | efx->state = STATE_READY; |
89c758fa | 3029 | |
6032fb56 BH |
3030 | efx->type->resume_wol(efx); |
3031 | } | |
89c758fa | 3032 | |
61da026d BH |
3033 | rtnl_unlock(); |
3034 | ||
319ba649 SH |
3035 | /* Reschedule any quenched resets scheduled during efx_pm_freeze() */ |
3036 | queue_work(reset_workqueue, &efx->reset_work); | |
3037 | ||
89c758fa | 3038 | return 0; |
261e4d96 JC |
3039 | |
3040 | fail: | |
3041 | rtnl_unlock(); | |
3042 | ||
3043 | return rc; | |
89c758fa BH |
3044 | } |
3045 | ||
3046 | static int efx_pm_poweroff(struct device *dev) | |
3047 | { | |
3048 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
3049 | struct efx_nic *efx = pci_get_drvdata(pci_dev); | |
3050 | ||
3051 | efx->type->fini(efx); | |
3052 | ||
a7d529ae | 3053 | efx->reset_pending = 0; |
89c758fa BH |
3054 | |
3055 | pci_save_state(pci_dev); | |
3056 | return pci_set_power_state(pci_dev, PCI_D3hot); | |
3057 | } | |
3058 | ||
3059 | /* Used for both resume and restore */ | |
3060 | static int efx_pm_resume(struct device *dev) | |
3061 | { | |
3062 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
3063 | struct efx_nic *efx = pci_get_drvdata(pci_dev); | |
3064 | int rc; | |
3065 | ||
3066 | rc = pci_set_power_state(pci_dev, PCI_D0); | |
3067 | if (rc) | |
3068 | return rc; | |
3069 | pci_restore_state(pci_dev); | |
3070 | rc = pci_enable_device(pci_dev); | |
3071 | if (rc) | |
3072 | return rc; | |
3073 | pci_set_master(efx->pci_dev); | |
3074 | rc = efx->type->reset(efx, RESET_TYPE_ALL); | |
3075 | if (rc) | |
3076 | return rc; | |
3077 | rc = efx->type->init(efx); | |
3078 | if (rc) | |
3079 | return rc; | |
261e4d96 JC |
3080 | rc = efx_pm_thaw(dev); |
3081 | return rc; | |
89c758fa BH |
3082 | } |
3083 | ||
3084 | static int efx_pm_suspend(struct device *dev) | |
3085 | { | |
3086 | int rc; | |
3087 | ||
3088 | efx_pm_freeze(dev); | |
3089 | rc = efx_pm_poweroff(dev); | |
3090 | if (rc) | |
3091 | efx_pm_resume(dev); | |
3092 | return rc; | |
3093 | } | |
3094 | ||
18e83e4c | 3095 | static const struct dev_pm_ops efx_pm_ops = { |
89c758fa BH |
3096 | .suspend = efx_pm_suspend, |
3097 | .resume = efx_pm_resume, | |
3098 | .freeze = efx_pm_freeze, | |
3099 | .thaw = efx_pm_thaw, | |
3100 | .poweroff = efx_pm_poweroff, | |
3101 | .restore = efx_pm_resume, | |
3102 | }; | |
3103 | ||
626950db AR |
3104 | /* A PCI error affecting this device was detected. |
3105 | * At this point MMIO and DMA may be disabled. | |
3106 | * Stop the software path and request a slot reset. | |
3107 | */ | |
debd0034 | 3108 | static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev, |
3109 | enum pci_channel_state state) | |
626950db AR |
3110 | { |
3111 | pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; | |
3112 | struct efx_nic *efx = pci_get_drvdata(pdev); | |
3113 | ||
3114 | if (state == pci_channel_io_perm_failure) | |
3115 | return PCI_ERS_RESULT_DISCONNECT; | |
3116 | ||
3117 | rtnl_lock(); | |
3118 | ||
3119 | if (efx->state != STATE_DISABLED) { | |
3120 | efx->state = STATE_RECOVERY; | |
3121 | efx->reset_pending = 0; | |
3122 | ||
3123 | efx_device_detach_sync(efx); | |
3124 | ||
3125 | efx_stop_all(efx); | |
d8291187 | 3126 | efx_disable_interrupts(efx); |
626950db AR |
3127 | |
3128 | status = PCI_ERS_RESULT_NEED_RESET; | |
3129 | } else { | |
3130 | /* If the interface is disabled we don't want to do anything | |
3131 | * with it. | |
3132 | */ | |
3133 | status = PCI_ERS_RESULT_RECOVERED; | |
3134 | } | |
3135 | ||
3136 | rtnl_unlock(); | |
3137 | ||
3138 | pci_disable_device(pdev); | |
3139 | ||
3140 | return status; | |
3141 | } | |
3142 | ||
3143 | /* Fake a successfull reset, which will be performed later in efx_io_resume. */ | |
debd0034 | 3144 | static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev) |
626950db AR |
3145 | { |
3146 | struct efx_nic *efx = pci_get_drvdata(pdev); | |
3147 | pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED; | |
3148 | int rc; | |
3149 | ||
3150 | if (pci_enable_device(pdev)) { | |
3151 | netif_err(efx, hw, efx->net_dev, | |
3152 | "Cannot re-enable PCI device after reset.\n"); | |
3153 | status = PCI_ERS_RESULT_DISCONNECT; | |
3154 | } | |
3155 | ||
3156 | rc = pci_cleanup_aer_uncorrect_error_status(pdev); | |
3157 | if (rc) { | |
3158 | netif_err(efx, hw, efx->net_dev, | |
3159 | "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc); | |
3160 | /* Non-fatal error. Continue. */ | |
3161 | } | |
3162 | ||
3163 | return status; | |
3164 | } | |
3165 | ||
3166 | /* Perform the actual reset and resume I/O operations. */ | |
3167 | static void efx_io_resume(struct pci_dev *pdev) | |
3168 | { | |
3169 | struct efx_nic *efx = pci_get_drvdata(pdev); | |
3170 | int rc; | |
3171 | ||
3172 | rtnl_lock(); | |
3173 | ||
3174 | if (efx->state == STATE_DISABLED) | |
3175 | goto out; | |
3176 | ||
3177 | rc = efx_reset(efx, RESET_TYPE_ALL); | |
3178 | if (rc) { | |
3179 | netif_err(efx, hw, efx->net_dev, | |
3180 | "efx_reset failed after PCI error (%d)\n", rc); | |
3181 | } else { | |
3182 | efx->state = STATE_READY; | |
3183 | netif_dbg(efx, hw, efx->net_dev, | |
3184 | "Done resetting and resuming IO after PCI error.\n"); | |
3185 | } | |
3186 | ||
3187 | out: | |
3188 | rtnl_unlock(); | |
3189 | } | |
3190 | ||
3191 | /* For simplicity and reliability, we always require a slot reset and try to | |
3192 | * reset the hardware when a pci error affecting the device is detected. | |
3193 | * We leave both the link_reset and mmio_enabled callback unimplemented: | |
3194 | * with our request for slot reset the mmio_enabled callback will never be | |
3195 | * called, and the link_reset callback is not used by AER or EEH mechanisms. | |
3196 | */ | |
3197 | static struct pci_error_handlers efx_err_handlers = { | |
3198 | .error_detected = efx_io_error_detected, | |
3199 | .slot_reset = efx_io_slot_reset, | |
3200 | .resume = efx_io_resume, | |
3201 | }; | |
3202 | ||
8ceee660 | 3203 | static struct pci_driver efx_pci_driver = { |
c5d5f5fd | 3204 | .name = KBUILD_MODNAME, |
8ceee660 BH |
3205 | .id_table = efx_pci_table, |
3206 | .probe = efx_pci_probe, | |
3207 | .remove = efx_pci_remove, | |
89c758fa | 3208 | .driver.pm = &efx_pm_ops, |
626950db | 3209 | .err_handler = &efx_err_handlers, |
8ceee660 BH |
3210 | }; |
3211 | ||
3212 | /************************************************************************** | |
3213 | * | |
3214 | * Kernel module interface | |
3215 | * | |
3216 | *************************************************************************/ | |
3217 | ||
3218 | module_param(interrupt_mode, uint, 0444); | |
3219 | MODULE_PARM_DESC(interrupt_mode, | |
3220 | "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)"); | |
3221 | ||
3222 | static int __init efx_init_module(void) | |
3223 | { | |
3224 | int rc; | |
3225 | ||
3226 | printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n"); | |
3227 | ||
3228 | rc = register_netdevice_notifier(&efx_netdev_notifier); | |
3229 | if (rc) | |
3230 | goto err_notifier; | |
3231 | ||
cd2d5b52 BH |
3232 | rc = efx_init_sriov(); |
3233 | if (rc) | |
3234 | goto err_sriov; | |
3235 | ||
1ab00629 SH |
3236 | reset_workqueue = create_singlethread_workqueue("sfc_reset"); |
3237 | if (!reset_workqueue) { | |
3238 | rc = -ENOMEM; | |
3239 | goto err_reset; | |
3240 | } | |
8ceee660 BH |
3241 | |
3242 | rc = pci_register_driver(&efx_pci_driver); | |
3243 | if (rc < 0) | |
3244 | goto err_pci; | |
3245 | ||
3246 | return 0; | |
3247 | ||
3248 | err_pci: | |
1ab00629 SH |
3249 | destroy_workqueue(reset_workqueue); |
3250 | err_reset: | |
cd2d5b52 BH |
3251 | efx_fini_sriov(); |
3252 | err_sriov: | |
8ceee660 BH |
3253 | unregister_netdevice_notifier(&efx_netdev_notifier); |
3254 | err_notifier: | |
3255 | return rc; | |
3256 | } | |
3257 | ||
3258 | static void __exit efx_exit_module(void) | |
3259 | { | |
3260 | printk(KERN_INFO "Solarflare NET driver unloading\n"); | |
3261 | ||
3262 | pci_unregister_driver(&efx_pci_driver); | |
1ab00629 | 3263 | destroy_workqueue(reset_workqueue); |
cd2d5b52 | 3264 | efx_fini_sriov(); |
8ceee660 BH |
3265 | unregister_netdevice_notifier(&efx_netdev_notifier); |
3266 | ||
3267 | } | |
3268 | ||
3269 | module_init(efx_init_module); | |
3270 | module_exit(efx_exit_module); | |
3271 | ||
906bb26c BH |
3272 | MODULE_AUTHOR("Solarflare Communications and " |
3273 | "Michael Brown <mbrown@fensystems.co.uk>"); | |
6a350fdb | 3274 | MODULE_DESCRIPTION("Solarflare network driver"); |
8ceee660 BH |
3275 | MODULE_LICENSE("GPL"); |
3276 | MODULE_DEVICE_TABLE(pci, efx_pci_table); |