]> git.proxmox.com Git - mirror_ubuntu-focal-kernel.git/blame - drivers/net/ethernet/sfc/efx.c
projects / mirror_ubuntu-focal-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_...
[mirror_ubuntu-focal-kernel.git] / drivers / net / ethernet / sfc / efx.c
CommitLineData
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"
e5fbd977
JC		 26#include <net/gre.h>
27#include <net/udp_tunnel.h>
8ceee660 28#include "efx.h"
744093c9 29#include "nic.h"
dd40781e 30#include "selftest.h"
7fa8d547 31#include "sriov.h"
8ceee660 32
8880f4ec 33#include "mcdi.h"
e5fbd977 34#include "mcdi_pcol.h"
fd371e32 35#include "workarounds.h"
8880f4ec 36
c459302d
BH		 37/**************************************************************************
38 *
39 * Type name strings
40 *
41 **************************************************************************
42 */
43
44/* Loopback mode names (see LOOPBACK_MODE()) */
45const unsigned int efx_loopback_mode_max = LOOPBACK_MAX;
18e83e4c 46const char *const efx_loopback_mode_names[] = {
c459302d 47 [LOOPBACK_NONE] = "NONE",
e58f69f4 48 [LOOPBACK_DATA] = "DATAPATH",
c459302d
BH		 49 [LOOPBACK_GMAC] = "GMAC",
50 [LOOPBACK_XGMII] = "XGMII",
51 [LOOPBACK_XGXS] = "XGXS",
9c636baf
BH		 52 [LOOPBACK_XAUI] = "XAUI",
53 [LOOPBACK_GMII] = "GMII",
54 [LOOPBACK_SGMII] = "SGMII",
e58f69f4
BH		 55 [LOOPBACK_XGBR] = "XGBR",
56 [LOOPBACK_XFI] = "XFI",
57 [LOOPBACK_XAUI_FAR] = "XAUI_FAR",
58 [LOOPBACK_GMII_FAR] = "GMII_FAR",
59 [LOOPBACK_SGMII_FAR] = "SGMII_FAR",
60 [LOOPBACK_XFI_FAR] = "XFI_FAR",
c459302d
BH		 61 [LOOPBACK_GPHY] = "GPHY",
62 [LOOPBACK_PHYXS] = "PHYXS",
9c636baf
BH		 63 [LOOPBACK_PCS] = "PCS",
64 [LOOPBACK_PMAPMD] = "PMA/PMD",
e58f69f4
BH		 65 [LOOPBACK_XPORT] = "XPORT",
66 [LOOPBACK_XGMII_WS] = "XGMII_WS",
9c636baf 67 [LOOPBACK_XAUI_WS] = "XAUI_WS",
e58f69f4
BH		 68 [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR",
69 [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR",
9c636baf 70 [LOOPBACK_GMII_WS] = "GMII_WS",
e58f69f4
BH		 71 [LOOPBACK_XFI_WS] = "XFI_WS",
72 [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR",
9c636baf 73 [LOOPBACK_PHYXS_WS] = "PHYXS_WS",
c459302d
BH		 74};
75
c459302d 76const unsigned int efx_reset_type_max = RESET_TYPE_MAX;
18e83e4c 77const char *const efx_reset_type_names[] = {
626950db
AR		 78 [RESET_TYPE_INVISIBLE] = "INVISIBLE",
79 [RESET_TYPE_ALL] = "ALL",
80 [RESET_TYPE_RECOVER_OR_ALL] = "RECOVER_OR_ALL",
81 [RESET_TYPE_WORLD] = "WORLD",
82 [RESET_TYPE_RECOVER_OR_DISABLE] = "RECOVER_OR_DISABLE",
087e9025 83 [RESET_TYPE_DATAPATH] = "DATAPATH",
e283546c 84 [RESET_TYPE_MC_BIST] = "MC_BIST",
626950db
AR		 85 [RESET_TYPE_DISABLE] = "DISABLE",
86 [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG",
87 [RESET_TYPE_INT_ERROR] = "INT_ERROR",
3de82b91 88 [RESET_TYPE_DMA_ERROR] = "DMA_ERROR",
626950db
AR		 89 [RESET_TYPE_TX_SKIP] = "TX_SKIP",
90 [RESET_TYPE_MC_FAILURE] = "MC_FAILURE",
e283546c 91 [RESET_TYPE_MCDI_TIMEOUT] = "MCDI_TIMEOUT (FLR)",
c459302d
BH		 92};
93
e5fbd977
JC		 94/* UDP tunnel type names */
95static const char *const efx_udp_tunnel_type_names[] = {
96 [TUNNEL_ENCAP_UDP_PORT_ENTRY_VXLAN] = "vxlan",
97 [TUNNEL_ENCAP_UDP_PORT_ENTRY_GENEVE] = "geneve",
98};
99
100void efx_get_udp_tunnel_type_name(u16 type, char *buf, size_t buflen)
101{
102 if (type < ARRAY_SIZE(efx_udp_tunnel_type_names) &&
103 efx_udp_tunnel_type_names[type] != NULL)
104 snprintf(buf, buflen, "%s", efx_udp_tunnel_type_names[type]);
105 else
106 snprintf(buf, buflen, "type %d", type);
107}
108
1ab00629
SH		 109/* Reset workqueue. If any NIC has a hardware failure then a reset will be
110 * queued onto this work queue. This is not a per-nic work queue, because
111 * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised.
112 */
113static struct workqueue_struct *reset_workqueue;
114
74cd60a4
JC		 115/* How often and how many times to poll for a reset while waiting for a
116 * BIST that another function started to complete.
117 */
118#define BIST_WAIT_DELAY_MS 100
119#define BIST_WAIT_DELAY_COUNT 100
120
8ceee660
BH		 121/**************************************************************************
122 *
123 * Configurable values
124 *
125 *************************************************************************/
126
8ceee660
BH		 127/*
128 * Use separate channels for TX and RX events
129 *
28b581ab
NT		 130 * Set this to 1 to use separate channels for TX and RX. It allows us
131 * to control interrupt affinity separately for TX and RX.
8ceee660 132 *
28b581ab 133 * This is only used in MSI-X interrupt mode
8ceee660 134 */
b0fbdae1
SS		 135bool efx_separate_tx_channels;
136module_param(efx_separate_tx_channels, bool, 0444);
137MODULE_PARM_DESC(efx_separate_tx_channels,
28b581ab 138 "Use separate channels for TX and RX");
8ceee660
BH		 139
140/* This is the weight assigned to each of the (per-channel) virtual
141 * NAPI devices.
142 */
143static int napi_weight = 64;
144
145/* This is the time (in jiffies) between invocations of the hardware
626950db
AR		 146 * monitor.
147 * On Falcon-based NICs, this will:
e254c274
BH		 148 * - Check the on-board hardware monitor;
149 * - Poll the link state and reconfigure the hardware as necessary.
626950db
AR		 150 * On Siena-based NICs for power systems with EEH support, this will give EEH a
151 * chance to start.
8ceee660 152 */
d215697f 153static unsigned int efx_monitor_interval = 1 * HZ;
8ceee660 154
8ceee660
BH		 155/* Initial interrupt moderation settings. They can be modified after
156 * module load with ethtool.
157 *
158 * The default for RX should strike a balance between increasing the
159 * round-trip latency and reducing overhead.
160 */
161static unsigned int rx_irq_mod_usec = 60;
162
163/* Initial interrupt moderation settings. They can be modified after
164 * module load with ethtool.
165 *
166 * This default is chosen to ensure that a 10G link does not go idle
167 * while a TX queue is stopped after it has become full. A queue is
168 * restarted when it drops below half full. The time this takes (assuming
169 * worst case 3 descriptors per packet and 1024 descriptors) is
170 * 512 / 3 * 1.2 = 205 usec.
171 */
172static unsigned int tx_irq_mod_usec = 150;
173
174/* This is the first interrupt mode to try out of:
175 * 0 => MSI-X
176 * 1 => MSI
177 * 2 => legacy
178 */
179static unsigned int interrupt_mode;
180
181/* This is the requested number of CPUs to use for Receive-Side Scaling (RSS),
182 * i.e. the number of CPUs among which we may distribute simultaneous
183 * interrupt handling.
184 *
185 * Cards without MSI-X will only target one CPU via legacy or MSI interrupt.
cdb08f8f 186 * The default (0) means to assign an interrupt to each core.
8ceee660
BH		 187 */
188static unsigned int rss_cpus;
189module_param(rss_cpus, uint, 0444);
190MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling");
191
b9cc977d
BH		 192static bool phy_flash_cfg;
193module_param(phy_flash_cfg, bool, 0644);
84ae48fe
BH		 194MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially");
195
e7bed9c8 196static unsigned irq_adapt_low_thresh = 8000;
6fb70fd1
BH		 197module_param(irq_adapt_low_thresh, uint, 0644);
198MODULE_PARM_DESC(irq_adapt_low_thresh,
199 "Threshold score for reducing IRQ moderation");
200
e7bed9c8 201static unsigned irq_adapt_high_thresh = 16000;
6fb70fd1
BH		 202module_param(irq_adapt_high_thresh, uint, 0644);
203MODULE_PARM_DESC(irq_adapt_high_thresh,
204 "Threshold score for increasing IRQ moderation");
205
62776d03
BH		 206static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
207 NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
208 NETIF_MSG_IFUP | NETIF_MSG_RX_ERR |
209 NETIF_MSG_TX_ERR | NETIF_MSG_HW);
210module_param(debug, uint, 0);
211MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value");
212
8ceee660
BH		 213/**************************************************************************
214 *
215 * Utility functions and prototypes
216 *
217 *************************************************************************/
4642610c 218
261e4d96 219static int efx_soft_enable_interrupts(struct efx_nic *efx);
d8291187 220static void efx_soft_disable_interrupts(struct efx_nic *efx);
7f967c01 221static void efx_remove_channel(struct efx_channel *channel);
4642610c 222static void efx_remove_channels(struct efx_nic *efx);
7f967c01 223static const struct efx_channel_type efx_default_channel_type;
8ceee660 224static void efx_remove_port(struct efx_nic *efx);
7f967c01 225static void efx_init_napi_channel(struct efx_channel *channel);
8ceee660 226static void efx_fini_napi(struct efx_nic *efx);
e8f14992 227static void efx_fini_napi_channel(struct efx_channel *channel);
4642610c
BH		 228static void efx_fini_struct(struct efx_nic *efx);
229static void efx_start_all(struct efx_nic *efx);
230static void efx_stop_all(struct efx_nic *efx);
8ceee660
BH		 231
232#define EFX_ASSERT_RESET_SERIALISED(efx) \
233 do { \
f16aeea0 234 if ((efx->state == STATE_READY) || \
626950db 235 (efx->state == STATE_RECOVERY) || \
332c1ce9 236 (efx->state == STATE_DISABLED)) \
8ceee660
BH		 237 ASSERT_RTNL(); \
238 } while (0)
239
8b7325b4
BH		 240static int efx_check_disabled(struct efx_nic *efx)
241{
626950db 242 if (efx->state == STATE_DISABLED || efx->state == STATE_RECOVERY) {
8b7325b4
BH		 243 netif_err(efx, drv, efx->net_dev,
244 "device is disabled due to earlier errors\n");
245 return -EIO;
246 }
247 return 0;
248}
249
8ceee660
BH		 250/**************************************************************************
251 *
252 * Event queue processing
253 *
254 *************************************************************************/
255
256/* Process channel's event queue
257 *
258 * This function is responsible for processing the event queue of a
259 * single channel. The caller must guarantee that this function will
260 * never be concurrently called more than once on the same channel,
261 * though different channels may be being processed concurrently.
262 */
fa236e18 263static int efx_process_channel(struct efx_channel *channel, int budget)
8ceee660 264{
c936835c 265 struct efx_tx_queue *tx_queue;
fa236e18 266 int spent;
8ceee660 267
9f2cb71c 268 if (unlikely(!channel->enabled))
42cbe2d7 269 return 0;
8ceee660 270
c936835c
PD		 271 efx_for_each_channel_tx_queue(tx_queue, channel) {
272 tx_queue->pkts_compl = 0;
273 tx_queue->bytes_compl = 0;
274 }
275
fa236e18 276 spent = efx_nic_process_eventq(channel, budget);
d9ab7007
BH		 277 if (spent && efx_channel_has_rx_queue(channel)) {
278 struct efx_rx_queue *rx_queue =
279 efx_channel_get_rx_queue(channel);
280
ff734ef4 281 efx_rx_flush_packet(channel);
cce28794 282 efx_fast_push_rx_descriptors(rx_queue, true);
8ceee660
BH		 283 }
284
c936835c
PD		 285 /* Update BQL */
286 efx_for_each_channel_tx_queue(tx_queue, channel) {
287 if (tx_queue->bytes_compl) {
288 netdev_tx_completed_queue(tx_queue->core_txq,
289 tx_queue->pkts_compl, tx_queue->bytes_compl);
290 }
291 }
292
fa236e18 293 return spent;
8ceee660
BH		 294}
295
8ceee660
BH		 296/* NAPI poll handler
297 *
298 * NAPI guarantees serialisation of polls of the same device, which
299 * provides the guarantee required by efx_process_channel().
300 */
539de7c5
BK		 301static void efx_update_irq_mod(struct efx_nic *efx, struct efx_channel *channel)
302{
303 int step = efx->irq_mod_step_us;
304
305 if (channel->irq_mod_score < irq_adapt_low_thresh) {
306 if (channel->irq_moderation_us > step) {
307 channel->irq_moderation_us -= step;
308 efx->type->push_irq_moderation(channel);
309 }
310 } else if (channel->irq_mod_score > irq_adapt_high_thresh) {
311 if (channel->irq_moderation_us <
312 efx->irq_rx_moderation_us) {
313 channel->irq_moderation_us += step;
314 efx->type->push_irq_moderation(channel);
315 }
316 }
317
318 channel->irq_count = 0;
319 channel->irq_mod_score = 0;
320}
321
8ceee660
BH		 322static int efx_poll(struct napi_struct *napi, int budget)
323{
324 struct efx_channel *channel =
325 container_of(napi, struct efx_channel, napi_str);
62776d03 326 struct efx_nic *efx = channel->efx;
fa236e18 327 int spent;
8ceee660 328
62776d03
BH		 329 netif_vdbg(efx, intr, efx->net_dev,
330 "channel %d NAPI poll executing on CPU %d\n",
331 channel->channel, raw_smp_processor_id());
8ceee660 332
fa236e18 333 spent = efx_process_channel(channel, budget);
8ceee660 334
fa236e18 335 if (spent < budget) {
9d9a6973 336 if (efx_channel_has_rx_queue(channel) &&
6fb70fd1
BH		 337 efx->irq_rx_adaptive &&
338 unlikely(++channel->irq_count == 1000)) {
539de7c5 339 efx_update_irq_mod(efx, channel);
6fb70fd1
BH		 340 }
341
64d8ad6d
BH		 342 efx_filter_rfs_expire(channel);
343
8ceee660 344 /* There is no race here; although napi_disable() will
288379f0 345 * only wait for napi_complete(), this isn't a problem
514bedbc 346 * since efx_nic_eventq_read_ack() will have no effect if
8ceee660
BH		 347 * interrupts have already been disabled.
348 */
f820c0ac
BK		 349 if (napi_complete_done(napi, spent))
350 efx_nic_eventq_read_ack(channel);
8ceee660
BH		 351 }
352
fa236e18 353 return spent;
8ceee660
BH		 354}
355
8ceee660
BH		 356/* Create event queue
357 * Event queue memory allocations are done only once. If the channel
358 * is reset, the memory buffer will be reused; this guards against
359 * errors during channel reset and also simplifies interrupt handling.
360 */
361static int efx_probe_eventq(struct efx_channel *channel)
362{
ecc910f5
SH		 363 struct efx_nic *efx = channel->efx;
364 unsigned long entries;
365
86ee5302 366 netif_dbg(efx, probe, efx->net_dev,
62776d03 367 "chan %d create event queue\n", channel->channel);
8ceee660 368
ecc910f5
SH		 369 /* Build an event queue with room for one event per tx and rx buffer,
370 * plus some extra for link state events and MCDI completions. */
371 entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128);
e01b16a7 372 EFX_WARN_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE);
ecc910f5
SH		 373 channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1;
374
152b6a62 375 return efx_nic_probe_eventq(channel);
8ceee660
BH		 376}
377
378/* Prepare channel's event queue */
261e4d96 379static int efx_init_eventq(struct efx_channel *channel)
8ceee660 380{
15acb1ce 381 struct efx_nic *efx = channel->efx;
261e4d96
JC		 382 int rc;
383
384 EFX_WARN_ON_PARANOID(channel->eventq_init);
385
15acb1ce 386 netif_dbg(efx, drv, efx->net_dev,
62776d03 387 "chan %d init event queue\n", channel->channel);
8ceee660 388
261e4d96
JC		 389 rc = efx_nic_init_eventq(channel);
390 if (rc == 0) {
15acb1ce 391 efx->type->push_irq_moderation(channel);
261e4d96
JC		 392 channel->eventq_read_ptr = 0;
393 channel->eventq_init = true;
394 }
395 return rc;
8ceee660
BH		 396}
397
9f2cb71c 398/* Enable event queue processing and NAPI */
36763266 399void efx_start_eventq(struct efx_channel *channel)
9f2cb71c
BH		 400{
401 netif_dbg(channel->efx, ifup, channel->efx->net_dev,
402 "chan %d start event queue\n", channel->channel);
403
514bedbc 404 /* Make sure the NAPI handler sees the enabled flag set */
9f2cb71c
BH		 405 channel->enabled = true;
406 smp_wmb();
407
408 napi_enable(&channel->napi_str);
409 efx_nic_eventq_read_ack(channel);
410}
411
412/* Disable event queue processing and NAPI */
36763266 413void efx_stop_eventq(struct efx_channel *channel)
9f2cb71c
BH		 414{
415 if (!channel->enabled)
416 return;
417
418 napi_disable(&channel->napi_str);
419 channel->enabled = false;
420}
421
8ceee660
BH		 422static void efx_fini_eventq(struct efx_channel *channel)
423{
be3fc09c
BH		 424 if (!channel->eventq_init)
425 return;
426
62776d03
BH		 427 netif_dbg(channel->efx, drv, channel->efx->net_dev,
428 "chan %d fini event queue\n", channel->channel);
8ceee660 429
152b6a62 430 efx_nic_fini_eventq(channel);
be3fc09c 431 channel->eventq_init = false;
8ceee660
BH		 432}
433
434static void efx_remove_eventq(struct efx_channel *channel)
435{
62776d03
BH		 436 netif_dbg(channel->efx, drv, channel->efx->net_dev,
437 "chan %d remove event queue\n", channel->channel);
8ceee660 438
152b6a62 439 efx_nic_remove_eventq(channel);
8ceee660
BH		 440}
441
442/**************************************************************************
443 *
444 * Channel handling
445 *
446 *************************************************************************/
447
7f967c01 448/* Allocate and initialise a channel structure. */
4642610c
BH		 449static struct efx_channel *
450efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel)
451{
452 struct efx_channel *channel;
453 struct efx_rx_queue *rx_queue;
454 struct efx_tx_queue *tx_queue;
455 int j;
456
7f967c01
BH		 457 channel = kzalloc(sizeof(*channel), GFP_KERNEL);
458 if (!channel)
459 return NULL;
4642610c 460
7f967c01
BH		 461 channel->efx = efx;
462 channel->channel = i;
463 channel->type = &efx_default_channel_type;
4642610c 464
7f967c01
BH		 465 for (j = 0; j < EFX_TXQ_TYPES; j++) {
466 tx_queue = &channel->tx_queue[j];
467 tx_queue->efx = efx;
468 tx_queue->queue = i * EFX_TXQ_TYPES + j;
469 tx_queue->channel = channel;
470 }
4642610c 471
7f967c01
BH		 472 rx_queue = &channel->rx_queue;
473 rx_queue->efx = efx;
474 setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill,
475 (unsigned long)rx_queue);
4642610c 476
7f967c01
BH		 477 return channel;
478}
479
480/* Allocate and initialise a channel structure, copying parameters
481 * (but not resources) from an old channel structure.
482 */
483static struct efx_channel *
484efx_copy_channel(const struct efx_channel *old_channel)
485{
486 struct efx_channel *channel;
487 struct efx_rx_queue *rx_queue;
488 struct efx_tx_queue *tx_queue;
489 int j;
4642610c 490
7f967c01
BH		 491 channel = kmalloc(sizeof(*channel), GFP_KERNEL);
492 if (!channel)
493 return NULL;
494
495 *channel = *old_channel;
496
497 channel->napi_dev = NULL;
46d054f8
BK		 498 INIT_HLIST_NODE(&channel->napi_str.napi_hash_node);
499 channel->napi_str.napi_id = 0;
500 channel->napi_str.state = 0;
7f967c01 501 memset(&channel->eventq, 0, sizeof(channel->eventq));
4642610c 502
7f967c01
BH		 503 for (j = 0; j < EFX_TXQ_TYPES; j++) {
504 tx_queue = &channel->tx_queue[j];
505 if (tx_queue->channel)
4642610c 506 tx_queue->channel = channel;
7f967c01
BH		 507 tx_queue->buffer = NULL;
508 memset(&tx_queue->txd, 0, sizeof(tx_queue->txd));
4642610c
BH		 509 }
510
4642610c 511 rx_queue = &channel->rx_queue;
7f967c01
BH		 512 rx_queue->buffer = NULL;
513 memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd));
4642610c
BH		 514 setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill,
515 (unsigned long)rx_queue);
516
517 return channel;
518}
519
8ceee660
BH		 520static int efx_probe_channel(struct efx_channel *channel)
521{
522 struct efx_tx_queue *tx_queue;
523 struct efx_rx_queue *rx_queue;
524 int rc;
525
62776d03
BH		 526 netif_dbg(channel->efx, probe, channel->efx->net_dev,
527 "creating channel %d\n", channel->channel);
8ceee660 528
7f967c01
BH		 529 rc = channel->type->pre_probe(channel);
530 if (rc)
531 goto fail;
532
8ceee660
BH		 533 rc = efx_probe_eventq(channel);
534 if (rc)
7f967c01 535 goto fail;
8ceee660
BH		 536
537 efx_for_each_channel_tx_queue(tx_queue, channel) {
538 rc = efx_probe_tx_queue(tx_queue);
539 if (rc)
7f967c01 540 goto fail;
8ceee660
BH		 541 }
542
543 efx_for_each_channel_rx_queue(rx_queue, channel) {
544 rc = efx_probe_rx_queue(rx_queue);
545 if (rc)
7f967c01 546 goto fail;
8ceee660
BH		 547 }
548
8ceee660
BH		 549 return 0;
550
7f967c01
BH		 551fail:
552 efx_remove_channel(channel);
8ceee660
BH		 553 return rc;
554}
555
7f967c01
BH		 556static void
557efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len)
558{
559 struct efx_nic *efx = channel->efx;
560 const char *type;
561 int number;
562
563 number = channel->channel;
564 if (efx->tx_channel_offset == 0) {
565 type = "";
566 } else if (channel->channel < efx->tx_channel_offset) {
567 type = "-rx";
568 } else {
569 type = "-tx";
570 number -= efx->tx_channel_offset;
571 }
572 snprintf(buf, len, "%s%s-%d", efx->name, type, number);
573}
8ceee660 574
56536e9c
BH		 575static void efx_set_channel_names(struct efx_nic *efx)
576{
577 struct efx_channel *channel;
56536e9c 578
7f967c01
BH		 579 efx_for_each_channel(channel, efx)
580 channel->type->get_name(channel,
d8291187
BH		 581 efx->msi_context[channel->channel].name,
582 sizeof(efx->msi_context[0].name));
56536e9c
BH		 583}
584
4642610c
BH		 585static int efx_probe_channels(struct efx_nic *efx)
586{
587 struct efx_channel *channel;
588 int rc;
589
590 /* Restart special buffer allocation */
591 efx->next_buffer_table = 0;
592
c92aaff1
BH		 593 /* Probe channels in reverse, so that any 'extra' channels
594 * use the start of the buffer table. This allows the traffic
595 * channels to be resized without moving them or wasting the
596 * entries before them.
597 */
598 efx_for_each_channel_rev(channel, efx) {
4642610c
BH		 599 rc = efx_probe_channel(channel);
600 if (rc) {
601 netif_err(efx, probe, efx->net_dev,
602 "failed to create channel %d\n",
603 channel->channel);
604 goto fail;
605 }
606 }
607 efx_set_channel_names(efx);
608
609 return 0;
610
611fail:
612 efx_remove_channels(efx);
613 return rc;
614}
615
8ceee660
BH		 616/* Channels are shutdown and reinitialised whilst the NIC is running
617 * to propagate configuration changes (mtu, checksum offload), or
618 * to clear hardware error conditions
619 */
9f2cb71c 620static void efx_start_datapath(struct efx_nic *efx)
8ceee660 621{
ebfcd0fd 622 netdev_features_t old_features = efx->net_dev->features;
85740cdf 623 bool old_rx_scatter = efx->rx_scatter;
8ceee660
BH		 624 struct efx_tx_queue *tx_queue;
625 struct efx_rx_queue *rx_queue;
626 struct efx_channel *channel;
85740cdf 627 size_t rx_buf_len;
8ceee660 628
f7f13b0b
BH		 629 /* Calculate the rx buffer allocation parameters required to
630 * support the current MTU, including padding for header
631 * alignment and overruns.
632 */
43a3739d 633 efx->rx_dma_len = (efx->rx_prefix_size +
272baeeb
BH		 634 EFX_MAX_FRAME_LEN(efx->net_dev->mtu) +
635 efx->type->rx_buffer_padding);
85740cdf 636 rx_buf_len = (sizeof(struct efx_rx_page_state) +
2ec03014 637 efx->rx_ip_align + efx->rx_dma_len);
85740cdf 638 if (rx_buf_len <= PAGE_SIZE) {
e8c68c0a 639 efx->rx_scatter = efx->type->always_rx_scatter;
85740cdf 640 efx->rx_buffer_order = 0;
85740cdf 641 } else if (efx->type->can_rx_scatter) {
950c54df 642 BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE % L1_CACHE_BYTES);
85740cdf 643 BUILD_BUG_ON(sizeof(struct efx_rx_page_state) +
950c54df
BH		 644 2 * ALIGN(NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE,
645 EFX_RX_BUF_ALIGNMENT) >
646 PAGE_SIZE);
85740cdf
BH		 647 efx->rx_scatter = true;
648 efx->rx_dma_len = EFX_RX_USR_BUF_SIZE;
649 efx->rx_buffer_order = 0;
85740cdf
BH		 650 } else {
651 efx->rx_scatter = false;
652 efx->rx_buffer_order = get_order(rx_buf_len);
85740cdf
BH		 653 }
654
1648a23f
DP		 655 efx_rx_config_page_split(efx);
656 if (efx->rx_buffer_order)
657 netif_dbg(efx, drv, efx->net_dev,
658 "RX buf len=%u; page order=%u batch=%u\n",
659 efx->rx_dma_len, efx->rx_buffer_order,
660 efx->rx_pages_per_batch);
661 else
662 netif_dbg(efx, drv, efx->net_dev,
663 "RX buf len=%u step=%u bpp=%u; page batch=%u\n",
664 efx->rx_dma_len, efx->rx_page_buf_step,
665 efx->rx_bufs_per_page, efx->rx_pages_per_batch);
2768935a 666
ebfcd0fd
AR		 667 /* Restore previously fixed features in hw_features and remove
668 * features which are fixed now
669 */
670 efx->net_dev->hw_features |= efx->net_dev->features;
671 efx->net_dev->hw_features &= ~efx->fixed_features;
672 efx->net_dev->features |= efx->fixed_features;
673 if (efx->net_dev->features != old_features)
674 netdev_features_change(efx->net_dev);
675
e8c68c0a 676 /* RX filters may also have scatter-enabled flags */
85740cdf 677 if (efx->rx_scatter != old_rx_scatter)
add72477 678 efx->type->filter_update_rx_scatter(efx);
8ceee660 679
14bf718f
BH		 680 /* We must keep at least one descriptor in a TX ring empty.
681 * We could avoid this when the queue size does not exactly
682 * match the hardware ring size, but it's not that important.
683 * Therefore we stop the queue when one more skb might fill
684 * the ring completely. We wake it when half way back to
685 * empty.
686 */
687 efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx);
688 efx->txq_wake_thresh = efx->txq_stop_thresh / 2;
689
8ceee660
BH		 690 /* Initialise the channels */
691 efx_for_each_channel(channel, efx) {
3881d8ab 692 efx_for_each_channel_tx_queue(tx_queue, channel) {
bc3c90a2 693 efx_init_tx_queue(tx_queue);
3881d8ab
AR		 694 atomic_inc(&efx->active_queues);
695 }
8ceee660 696
9f2cb71c 697 efx_for_each_channel_rx_queue(rx_queue, channel) {
bc3c90a2 698 efx_init_rx_queue(rx_queue);
3881d8ab 699 atomic_inc(&efx->active_queues);
cce28794
JC		 700 efx_stop_eventq(channel);
701 efx_fast_push_rx_descriptors(rx_queue, false);
702 efx_start_eventq(channel);
9f2cb71c 703 }
8ceee660 704
85740cdf 705 WARN_ON(channel->rx_pkt_n_frags);
8ceee660 706 }
8ceee660 707
2ea4dc28
AR		 708 efx_ptp_start_datapath(efx);
709
9f2cb71c
BH		 710 if (netif_device_present(efx->net_dev))
711 netif_tx_wake_all_queues(efx->net_dev);
8ceee660
BH		 712}
713
9f2cb71c 714static void efx_stop_datapath(struct efx_nic *efx)
8ceee660
BH		 715{
716 struct efx_channel *channel;
717 struct efx_tx_queue *tx_queue;
718 struct efx_rx_queue *rx_queue;
6bc5d3a9 719 int rc;
8ceee660
BH		 720
721 EFX_ASSERT_RESET_SERIALISED(efx);
722 BUG_ON(efx->port_enabled);
723
2ea4dc28
AR		 724 efx_ptp_stop_datapath(efx);
725
d8aec745
BH		 726 /* Stop RX refill */
727 efx_for_each_channel(channel, efx) {
728 efx_for_each_channel_rx_queue(rx_queue, channel)
729 rx_queue->refill_enabled = false;
730 }
731
8ceee660 732 efx_for_each_channel(channel, efx) {
9f2cb71c
BH		 733 /* RX packet processing is pipelined, so wait for the
734 * NAPI handler to complete. At least event queue 0
735 * might be kept active by non-data events, so don't
736 * use napi_synchronize() but actually disable NAPI
737 * temporarily.
738 */
739 if (efx_channel_has_rx_queue(channel)) {
740 efx_stop_eventq(channel);
741 efx_start_eventq(channel);
742 }
e42c3d85 743 }
8ceee660 744
e42c3d85 745 rc = efx->type->fini_dmaq(efx);
5a6681e2 746 if (rc) {
e42c3d85
BH		 747 netif_err(efx, drv, efx->net_dev, "failed to flush queues\n");
748 } else {
749 netif_dbg(efx, drv, efx->net_dev,
750 "successfully flushed all queues\n");
751 }
752
753 efx_for_each_channel(channel, efx) {
8ceee660
BH		 754 efx_for_each_channel_rx_queue(rx_queue, channel)
755 efx_fini_rx_queue(rx_queue);
94b274bf 756 efx_for_each_possible_channel_tx_queue(tx_queue, channel)
8ceee660 757 efx_fini_tx_queue(tx_queue);
8ceee660
BH		 758 }
759}
760
761static void efx_remove_channel(struct efx_channel *channel)
762{
763 struct efx_tx_queue *tx_queue;
764 struct efx_rx_queue *rx_queue;
765
62776d03
BH		 766 netif_dbg(channel->efx, drv, channel->efx->net_dev,
767 "destroy chan %d\n", channel->channel);
8ceee660
BH		 768
769 efx_for_each_channel_rx_queue(rx_queue, channel)
770 efx_remove_rx_queue(rx_queue);
94b274bf 771 efx_for_each_possible_channel_tx_queue(tx_queue, channel)
8ceee660
BH		 772 efx_remove_tx_queue(tx_queue);
773 efx_remove_eventq(channel);
c31e5f9f 774 channel->type->post_remove(channel);
8ceee660
BH		 775}
776
4642610c
BH		 777static void efx_remove_channels(struct efx_nic *efx)
778{
779 struct efx_channel *channel;
780
781 efx_for_each_channel(channel, efx)
782 efx_remove_channel(channel);
783}
784
785int
786efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries)
787{
788 struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel;
789 u32 old_rxq_entries, old_txq_entries;
7f967c01 790 unsigned i, next_buffer_table = 0;
261e4d96 791 int rc, rc2;
8b7325b4
BH		 792
793 rc = efx_check_disabled(efx);
794 if (rc)
795 return rc;
7f967c01
BH		 796
797 /* Not all channels should be reallocated. We must avoid
798 * reallocating their buffer table entries.
799 */
800 efx_for_each_channel(channel, efx) {
801 struct efx_rx_queue *rx_queue;
802 struct efx_tx_queue *tx_queue;
803
804 if (channel->type->copy)
805 continue;
806 next_buffer_table = max(next_buffer_table,
807 channel->eventq.index +
808 channel->eventq.entries);
809 efx_for_each_channel_rx_queue(rx_queue, channel)
810 next_buffer_table = max(next_buffer_table,
811 rx_queue->rxd.index +
812 rx_queue->rxd.entries);
813 efx_for_each_channel_tx_queue(tx_queue, channel)
814 next_buffer_table = max(next_buffer_table,
815 tx_queue->txd.index +
816 tx_queue->txd.entries);
817 }
4642610c 818
29c69a48 819 efx_device_detach_sync(efx);
4642610c 820 efx_stop_all(efx);
d8291187 821 efx_soft_disable_interrupts(efx);
4642610c 822
7f967c01 823 /* Clone channels (where possible) */
4642610c
BH		 824 memset(other_channel, 0, sizeof(other_channel));
825 for (i = 0; i < efx->n_channels; i++) {
7f967c01
BH		 826 channel = efx->channel[i];
827 if (channel->type->copy)
828 channel = channel->type->copy(channel);
4642610c
BH		 829 if (!channel) {
830 rc = -ENOMEM;
831 goto out;
832 }
833 other_channel[i] = channel;
834 }
835
836 /* Swap entry counts and channel pointers */
837 old_rxq_entries = efx->rxq_entries;
838 old_txq_entries = efx->txq_entries;
839 efx->rxq_entries = rxq_entries;
840 efx->txq_entries = txq_entries;
841 for (i = 0; i < efx->n_channels; i++) {
842 channel = efx->channel[i];
843 efx->channel[i] = other_channel[i];
844 other_channel[i] = channel;
845 }
846
7f967c01
BH		 847 /* Restart buffer table allocation */
848 efx->next_buffer_table = next_buffer_table;
e8f14992 849
e8f14992 850 for (i = 0; i < efx->n_channels; i++) {
7f967c01
BH		 851 channel = efx->channel[i];
852 if (!channel->type->copy)
853 continue;
854 rc = efx_probe_channel(channel);
855 if (rc)
856 goto rollback;
857 efx_init_napi_channel(efx->channel[i]);
e8f14992 858 }
7f967c01 859
4642610c 860out:
7f967c01
BH		 861 /* Destroy unused channel structures */
862 for (i = 0; i < efx->n_channels; i++) {
863 channel = other_channel[i];
864 if (channel && channel->type->copy) {
865 efx_fini_napi_channel(channel);
866 efx_remove_channel(channel);
867 kfree(channel);
868 }
869 }
4642610c 870
261e4d96
JC		 871 rc2 = efx_soft_enable_interrupts(efx);
872 if (rc2) {
873 rc = rc ? rc : rc2;
874 netif_err(efx, drv, efx->net_dev,
875 "unable to restart interrupts on channel reallocation\n");
876 efx_schedule_reset(efx, RESET_TYPE_DISABLE);
877 } else {
878 efx_start_all(efx);
9c568fd8 879 efx_device_attach_if_not_resetting(efx);
261e4d96 880 }
4642610c
BH		 881 return rc;
882
883rollback:
884 /* Swap back */
885 efx->rxq_entries = old_rxq_entries;
886 efx->txq_entries = old_txq_entries;
887 for (i = 0; i < efx->n_channels; i++) {
888 channel = efx->channel[i];
889 efx->channel[i] = other_channel[i];
890 other_channel[i] = channel;
891 }
892 goto out;
893}
894
90d683af 895void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue)
8ceee660 896{
90d683af 897 mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100));
8ceee660
BH		 898}
899
7f967c01
BH		 900static const struct efx_channel_type efx_default_channel_type = {
901 .pre_probe = efx_channel_dummy_op_int,
c31e5f9f 902 .post_remove = efx_channel_dummy_op_void,
7f967c01
BH		 903 .get_name = efx_get_channel_name,
904 .copy = efx_copy_channel,
905 .keep_eventq = false,
906};
907
908int efx_channel_dummy_op_int(struct efx_channel *channel)
909{
910 return 0;
911}
912
c31e5f9f
SH		 913void efx_channel_dummy_op_void(struct efx_channel *channel)
914{
915}
916
8ceee660
BH		 917/**************************************************************************
918 *
919 * Port handling
920 *
921 **************************************************************************/
922
923/* This ensures that the kernel is kept informed (via
924 * netif_carrier_on/off) of the link status, and also maintains the
925 * link status's stop on the port's TX queue.
926 */
fdaa9aed 927void efx_link_status_changed(struct efx_nic *efx)
8ceee660 928{
eb50c0d6
BH		 929 struct efx_link_state *link_state = &efx->link_state;
930
8ceee660
BH		 931 /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
932 * that no events are triggered between unregister_netdev() and the
933 * driver unloading. A more general condition is that NETDEV_CHANGE
934 * can only be generated between NETDEV_UP and NETDEV_DOWN */
935 if (!netif_running(efx->net_dev))
936 return;
937
eb50c0d6 938 if (link_state->up != netif_carrier_ok(efx->net_dev)) {
8ceee660
BH		 939 efx->n_link_state_changes++;
940
eb50c0d6 941 if (link_state->up)
8ceee660
BH		 942 netif_carrier_on(efx->net_dev);
943 else
944 netif_carrier_off(efx->net_dev);
945 }
946
947 /* Status message for kernel log */
2aa9ef11 948 if (link_state->up)
62776d03 949 netif_info(efx, link, efx->net_dev,
964e6135 950 "link up at %uMbps %s-duplex (MTU %d)\n",
62776d03 951 link_state->speed, link_state->fd ? "full" : "half",
964e6135 952 efx->net_dev->mtu);
2aa9ef11 953 else
62776d03 954 netif_info(efx, link, efx->net_dev, "link down\n");
8ceee660
BH		 955}
956
d3245b28
BH		 957void efx_link_set_advertising(struct efx_nic *efx, u32 advertising)
958{
959 efx->link_advertising = advertising;
960 if (advertising) {
961 if (advertising & ADVERTISED_Pause)
962 efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX);
963 else
964 efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX);
965 if (advertising & ADVERTISED_Asym_Pause)
966 efx->wanted_fc ^= EFX_FC_TX;
967 }
968}
969
b5626946 970void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc)
d3245b28
BH		 971{
972 efx->wanted_fc = wanted_fc;
973 if (efx->link_advertising) {
974 if (wanted_fc & EFX_FC_RX)
975 efx->link_advertising |= (ADVERTISED_Pause |
976 ADVERTISED_Asym_Pause);
977 else
978 efx->link_advertising &= ~(ADVERTISED_Pause |
979 ADVERTISED_Asym_Pause);
980 if (wanted_fc & EFX_FC_TX)
981 efx->link_advertising ^= ADVERTISED_Asym_Pause;
982 }
983}
984
115122af
BH		 985static void efx_fini_port(struct efx_nic *efx);
986
0d322413
EC		 987/* We assume that efx->type->reconfigure_mac will always try to sync RX
988 * filters and therefore needs to read-lock the filter table against freeing
989 */
990void efx_mac_reconfigure(struct efx_nic *efx)
991{
992 down_read(&efx->filter_sem);
993 efx->type->reconfigure_mac(efx);
994 up_read(&efx->filter_sem);
995}
996
d3245b28
BH		 997/* Push loopback/power/transmit disable settings to the PHY, and reconfigure
998 * the MAC appropriately. All other PHY configuration changes are pushed
999 * through phy_op->set_settings(), and pushed asynchronously to the MAC
1000 * through efx_monitor().
1001 *
1002 * Callers must hold the mac_lock
1003 */
1004int __efx_reconfigure_port(struct efx_nic *efx)
8ceee660 1005{
d3245b28
BH		 1006 enum efx_phy_mode phy_mode;
1007 int rc;
8ceee660 1008
d3245b28 1009 WARN_ON(!mutex_is_locked(&efx->mac_lock));
8ceee660 1010
d3245b28
BH		 1011 /* Disable PHY transmit in mac level loopbacks */
1012 phy_mode = efx->phy_mode;
177dfcd8
BH		 1013 if (LOOPBACK_INTERNAL(efx))
1014 efx->phy_mode |= PHY_MODE_TX_DISABLED;
1015 else
1016 efx->phy_mode &= ~PHY_MODE_TX_DISABLED;
177dfcd8 1017
d3245b28 1018 rc = efx->type->reconfigure_port(efx);
8ceee660 1019
d3245b28
BH		 1020 if (rc)
1021 efx->phy_mode = phy_mode;
177dfcd8 1022
d3245b28 1023 return rc;
8ceee660
BH		 1024}
1025
1026/* Reinitialise the MAC to pick up new PHY settings, even if the port is
1027 * disabled. */
d3245b28 1028int efx_reconfigure_port(struct efx_nic *efx)
8ceee660 1029{
d3245b28
BH		 1030 int rc;
1031
8ceee660
BH		 1032 EFX_ASSERT_RESET_SERIALISED(efx);
1033
1034 mutex_lock(&efx->mac_lock);
d3245b28 1035 rc = __efx_reconfigure_port(efx);
8ceee660 1036 mutex_unlock(&efx->mac_lock);
d3245b28
BH		 1037
1038 return rc;
8ceee660
BH		 1039}
1040
8be4f3e6
BH		 1041/* Asynchronous work item for changing MAC promiscuity and multicast
1042 * hash. Avoid a drain/rx_ingress enable by reconfiguring the current
1043 * MAC directly. */
766ca0fa
BH		 1044static void efx_mac_work(struct work_struct *data)
1045{
1046 struct efx_nic *efx = container_of(data, struct efx_nic, mac_work);
1047
1048 mutex_lock(&efx->mac_lock);
30b81cda 1049 if (efx->port_enabled)
0d322413 1050 efx_mac_reconfigure(efx);
766ca0fa
BH		 1051 mutex_unlock(&efx->mac_lock);
1052}
1053
8ceee660
BH		 1054static int efx_probe_port(struct efx_nic *efx)
1055{
1056 int rc;
1057
62776d03 1058 netif_dbg(efx, probe, efx->net_dev, "create port\n");
8ceee660 1059
ff3b00a0
SH		 1060 if (phy_flash_cfg)
1061 efx->phy_mode = PHY_MODE_SPECIAL;
1062
ef2b90ee
BH		 1063 /* Connect up MAC/PHY operations table */
1064 rc = efx->type->probe_port(efx);
8ceee660 1065 if (rc)
e42de262 1066 return rc;
8ceee660 1067
e332bcb3 1068 /* Initialise MAC address to permanent address */
cd84ff4d 1069 ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr);
8ceee660
BH		 1070
1071 return 0;
8ceee660
BH		 1072}
1073
1074static int efx_init_port(struct efx_nic *efx)
1075{
1076 int rc;
1077
62776d03 1078 netif_dbg(efx, drv, efx->net_dev, "init port\n");
8ceee660 1079
1dfc5cea
BH		 1080 mutex_lock(&efx->mac_lock);
1081
177dfcd8 1082 rc = efx->phy_op->init(efx);
8ceee660 1083 if (rc)
1dfc5cea 1084 goto fail1;
8ceee660 1085
dc8cfa55 1086 efx->port_initialized = true;
1dfc5cea 1087
d3245b28
BH		 1088 /* Reconfigure the MAC before creating dma queues (required for
1089 * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */
0d322413 1090 efx_mac_reconfigure(efx);
d3245b28
BH		 1091
1092 /* Ensure the PHY advertises the correct flow control settings */
1093 rc = efx->phy_op->reconfigure(efx);
267d9d73 1094 if (rc && rc != -EPERM)
d3245b28
BH		 1095 goto fail2;
1096
1dfc5cea 1097 mutex_unlock(&efx->mac_lock);
8ceee660 1098 return 0;
177dfcd8 1099
1dfc5cea 1100fail2:
177dfcd8 1101 efx->phy_op->fini(efx);
1dfc5cea
BH		 1102fail1:
1103 mutex_unlock(&efx->mac_lock);
177dfcd8 1104 return rc;
8ceee660
BH		 1105}
1106
8ceee660
BH		 1107static void efx_start_port(struct efx_nic *efx)
1108{
62776d03 1109 netif_dbg(efx, ifup, efx->net_dev, "start port\n");
8ceee660
BH		 1110 BUG_ON(efx->port_enabled);
1111
1112 mutex_lock(&efx->mac_lock);
dc8cfa55 1113 efx->port_enabled = true;
8be4f3e6 1114
d615c039 1115 /* Ensure MAC ingress/egress is enabled */
0d322413 1116 efx_mac_reconfigure(efx);
8be4f3e6 1117
8ceee660
BH		 1118 mutex_unlock(&efx->mac_lock);
1119}
1120
d615c039
BH		 1121/* Cancel work for MAC reconfiguration, periodic hardware monitoring
1122 * and the async self-test, wait for them to finish and prevent them
1123 * being scheduled again. This doesn't cover online resets, which
1124 * should only be cancelled when removing the device.
1125 */
8ceee660
BH		 1126static void efx_stop_port(struct efx_nic *efx)
1127{
62776d03 1128 netif_dbg(efx, ifdown, efx->net_dev, "stop port\n");
8ceee660 1129
d615c039
BH		 1130 EFX_ASSERT_RESET_SERIALISED(efx);
1131
8ceee660 1132 mutex_lock(&efx->mac_lock);
dc8cfa55 1133 efx->port_enabled = false;
8ceee660
BH		 1134 mutex_unlock(&efx->mac_lock);
1135
1136 /* Serialise against efx_set_multicast_list() */
73ba7b68
BH		 1137 netif_addr_lock_bh(efx->net_dev);
1138 netif_addr_unlock_bh(efx->net_dev);
d615c039
BH		 1139
1140 cancel_delayed_work_sync(&efx->monitor_work);
1141 efx_selftest_async_cancel(efx);
1142 cancel_work_sync(&efx->mac_work);
8ceee660
BH		 1143}
1144
1145static void efx_fini_port(struct efx_nic *efx)
1146{
62776d03 1147 netif_dbg(efx, drv, efx->net_dev, "shut down port\n");
8ceee660
BH		 1148
1149 if (!efx->port_initialized)
1150 return;
1151
177dfcd8 1152 efx->phy_op->fini(efx);
dc8cfa55 1153 efx->port_initialized = false;
8ceee660 1154
eb50c0d6 1155 efx->link_state.up = false;
8ceee660
BH		 1156 efx_link_status_changed(efx);
1157}
1158
1159static void efx_remove_port(struct efx_nic *efx)
1160{
62776d03 1161 netif_dbg(efx, drv, efx->net_dev, "destroying port\n");
8ceee660 1162
ef2b90ee 1163 efx->type->remove_port(efx);
8ceee660
BH		 1164}
1165
1166/**************************************************************************
1167 *
1168 * NIC handling
1169 *
1170 **************************************************************************/
1171
0bcf4a64
BH		 1172static LIST_HEAD(efx_primary_list);
1173static LIST_HEAD(efx_unassociated_list);
1174
1175static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right)
1176{
1177 return left->type == right->type &&
1178 left->vpd_sn && right->vpd_sn &&
1179 !strcmp(left->vpd_sn, right->vpd_sn);
1180}
1181
1182static void efx_associate(struct efx_nic *efx)
1183{
1184 struct efx_nic *other, *next;
1185
1186 if (efx->primary == efx) {
1187 /* Adding primary function; look for secondaries */
1188
1189 netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n");
1190 list_add_tail(&efx->node, &efx_primary_list);
1191
1192 list_for_each_entry_safe(other, next, &efx_unassociated_list,
1193 node) {
1194 if (efx_same_controller(efx, other)) {
1195 list_del(&other->node);
1196 netif_dbg(other, probe, other->net_dev,
1197 "moving to secondary list of %s %s\n",
1198 pci_name(efx->pci_dev),
1199 efx->net_dev->name);
1200 list_add_tail(&other->node,
1201 &efx->secondary_list);
1202 other->primary = efx;
1203 }
1204 }
1205 } else {
1206 /* Adding secondary function; look for primary */
1207
1208 list_for_each_entry(other, &efx_primary_list, node) {
1209 if (efx_same_controller(efx, other)) {
1210 netif_dbg(efx, probe, efx->net_dev,
1211 "adding to secondary list of %s %s\n",
1212 pci_name(other->pci_dev),
1213 other->net_dev->name);
1214 list_add_tail(&efx->node,
1215 &other->secondary_list);
1216 efx->primary = other;
1217 return;
1218 }
1219 }
1220
1221 netif_dbg(efx, probe, efx->net_dev,
1222 "adding to unassociated list\n");
1223 list_add_tail(&efx->node, &efx_unassociated_list);
1224 }
1225}
1226
1227static void efx_dissociate(struct efx_nic *efx)
1228{
1229 struct efx_nic *other, *next;
1230
1231 list_del(&efx->node);
1232 efx->primary = NULL;
1233
1234 list_for_each_entry_safe(other, next, &efx->secondary_list, node) {
1235 list_del(&other->node);
1236 netif_dbg(other, probe, other->net_dev,
1237 "moving to unassociated list\n");
1238 list_add_tail(&other->node, &efx_unassociated_list);
1239 other->primary = NULL;
1240 }
1241}
1242
8ceee660
BH		 1243/* This configures the PCI device to enable I/O and DMA. */
1244static int efx_init_io(struct efx_nic *efx)
1245{
1246 struct pci_dev *pci_dev = efx->pci_dev;
1247 dma_addr_t dma_mask = efx->type->max_dma_mask;
b105798f 1248 unsigned int mem_map_size = efx->type->mem_map_size(efx);
02246a7f 1249 int rc, bar;
8ceee660 1250
62776d03 1251 netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n");
8ceee660 1252
02246a7f
SS		 1253 bar = efx->type->mem_bar;
1254
8ceee660
BH		 1255 rc = pci_enable_device(pci_dev);
1256 if (rc) {
62776d03
BH		 1257 netif_err(efx, probe, efx->net_dev,
1258 "failed to enable PCI device\n");
8ceee660
BH		 1259 goto fail1;
1260 }
1261
1262 pci_set_master(pci_dev);
1263
1264 /* Set the PCI DMA mask. Try all possibilities from our
1265 * genuine mask down to 32 bits, because some architectures
1266 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
1267 * masks event though they reject 46 bit masks.
1268 */
1269 while (dma_mask > 0x7fffffffUL) {
8722b8fb
CH		 1270 rc = dma_set_mask_and_coherent(&pci_dev->dev, dma_mask);
1271 if (rc == 0)
1272 break;
8ceee660
BH		 1273 dma_mask >>= 1;
1274 }
1275 if (rc) {
62776d03
BH		 1276 netif_err(efx, probe, efx->net_dev,
1277 "could not find a suitable DMA mask\n");
8ceee660
BH		 1278 goto fail2;
1279 }
62776d03
BH		 1280 netif_dbg(efx, probe, efx->net_dev,
1281 "using DMA mask %llx\n", (unsigned long long) dma_mask);
8ceee660 1282
02246a7f
SS		 1283 efx->membase_phys = pci_resource_start(efx->pci_dev, bar);
1284 rc = pci_request_region(pci_dev, bar, "sfc");
8ceee660 1285 if (rc) {
62776d03
BH		 1286 netif_err(efx, probe, efx->net_dev,
1287 "request for memory BAR failed\n");
8ceee660
BH		 1288 rc = -EIO;
1289 goto fail3;
1290 }
b105798f 1291 efx->membase = ioremap_nocache(efx->membase_phys, mem_map_size);
8ceee660 1292 if (!efx->membase) {
62776d03
BH		 1293 netif_err(efx, probe, efx->net_dev,
1294 "could not map memory BAR at %llx+%x\n",
b105798f 1295 (unsigned long long)efx->membase_phys, mem_map_size);
8ceee660
BH		 1296 rc = -ENOMEM;
1297 goto fail4;
1298 }
62776d03
BH		 1299 netif_dbg(efx, probe, efx->net_dev,
1300 "memory BAR at %llx+%x (virtual %p)\n",
b105798f
BH		 1301 (unsigned long long)efx->membase_phys, mem_map_size,
1302 efx->membase);
8ceee660
BH		 1303
1304 return 0;
1305
1306 fail4:
02246a7f 1307 pci_release_region(efx->pci_dev, bar);
8ceee660 1308 fail3:
2c118e0f 1309 efx->membase_phys = 0;
8ceee660
BH		 1310 fail2:
1311 pci_disable_device(efx->pci_dev);
1312 fail1:
1313 return rc;
1314}
1315
1316static void efx_fini_io(struct efx_nic *efx)
1317{
02246a7f
SS		 1318 int bar;
1319
62776d03 1320 netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n");
8ceee660
BH		 1321
1322 if (efx->membase) {
1323 iounmap(efx->membase);
1324 efx->membase = NULL;
1325 }
1326
1327 if (efx->membase_phys) {
02246a7f
SS		 1328 bar = efx->type->mem_bar;
1329 pci_release_region(efx->pci_dev, bar);
2c118e0f 1330 efx->membase_phys = 0;
8ceee660
BH		 1331 }
1332
6598dad2
DP		 1333 /* Don't disable bus-mastering if VFs are assigned */
1334 if (!pci_vfs_assigned(efx->pci_dev))
1335 pci_disable_device(efx->pci_dev);
8ceee660
BH		 1336}
1337
267c0157
JC		 1338void efx_set_default_rx_indir_table(struct efx_nic *efx)
1339{
1340 size_t i;
1341
1342 for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++)
1343 efx->rx_indir_table[i] =
1344 ethtool_rxfh_indir_default(i, efx->rss_spread);
8ceee660
BH		 1345}
1346
a9a52506 1347static unsigned int efx_wanted_parallelism(struct efx_nic *efx)
46123d04 1348{
cdb08f8f 1349 cpumask_var_t thread_mask;
a16e5b24 1350 unsigned int count;
46123d04 1351 int cpu;
5b874e25 1352
cd2d5b52
BH		 1353 if (rss_cpus) {
1354 count = rss_cpus;
1355 } else {
1356 if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) {
1357 netif_warn(efx, probe, efx->net_dev,
1358 "RSS disabled due to allocation failure\n");
1359 return 1;
1360 }
46123d04 1361
cd2d5b52
BH		 1362 count = 0;
1363 for_each_online_cpu(cpu) {
1364 if (!cpumask_test_cpu(cpu, thread_mask)) {
1365 ++count;
1366 cpumask_or(thread_mask, thread_mask,
06931e62 1367 topology_sibling_cpumask(cpu));
cd2d5b52
BH		 1368 }
1369 }
1370
1371 free_cpumask_var(thread_mask);
2f8975fb
RR		 1372 }
1373
271a8b42
BK		 1374 if (count > EFX_MAX_RX_QUEUES) {
1375 netif_cond_dbg(efx, probe, efx->net_dev, !rss_cpus, warn,
1376 "Reducing number of rx queues from %u to %u.\n",
1377 count, EFX_MAX_RX_QUEUES);
1378 count = EFX_MAX_RX_QUEUES;
1379 }
1380
cd2d5b52
BH		 1381 /* If RSS is requested for the PF *and* VFs then we can't write RSS
1382 * table entries that are inaccessible to VFs
1383 */
7fa8d547
SS		 1384#ifdef CONFIG_SFC_SRIOV
1385 if (efx->type->sriov_wanted) {
1386 if (efx->type->sriov_wanted(efx) && efx_vf_size(efx) > 1 &&
1387 count > efx_vf_size(efx)) {
1388 netif_warn(efx, probe, efx->net_dev,
1389 "Reducing number of RSS channels from %u to %u for "
1390 "VF support. Increase vf-msix-limit to use more "
1391 "channels on the PF.\n",
1392 count, efx_vf_size(efx));
1393 count = efx_vf_size(efx);
1394 }
46123d04 1395 }
7fa8d547 1396#endif
46123d04
BH		 1397
1398 return count;
1399}
1400
1401/* Probe the number and type of interrupts we are able to obtain, and
1402 * the resulting numbers of channels and RX queues.
1403 */
64d8ad6d 1404static int efx_probe_interrupts(struct efx_nic *efx)
8ceee660 1405{
7f967c01
BH		 1406 unsigned int extra_channels = 0;
1407 unsigned int i, j;
a16e5b24 1408 int rc;
8ceee660 1409
7f967c01
BH		 1410 for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++)
1411 if (efx->extra_channel_type[i])
1412 ++extra_channels;
1413
8ceee660 1414 if (efx->interrupt_mode == EFX_INT_MODE_MSIX) {
46123d04 1415 struct msix_entry xentries[EFX_MAX_CHANNELS];
a16e5b24 1416 unsigned int n_channels;
aa6ef27e 1417
a9a52506 1418 n_channels = efx_wanted_parallelism(efx);
b0fbdae1 1419 if (efx_separate_tx_channels)
a4900ac9 1420 n_channels *= 2;
7f967c01 1421 n_channels += extra_channels;
b105798f 1422 n_channels = min(n_channels, efx->max_channels);
8ceee660 1423
a4900ac9 1424 for (i = 0; i < n_channels; i++)
8ceee660 1425 xentries[i].entry = i;
184603d8
AG		 1426 rc = pci_enable_msix_range(efx->pci_dev,
1427 xentries, 1, n_channels);
1428 if (rc < 0) {
1429 /* Fall back to single channel MSI */
184603d8
AG		 1430 netif_err(efx, drv, efx->net_dev,
1431 "could not enable MSI-X\n");
62980cb6
AR		 1432 if (efx->type->min_interrupt_mode >= EFX_INT_MODE_MSI)
1433 efx->interrupt_mode = EFX_INT_MODE_MSI;
1434 else
1435 return rc;
184603d8 1436 } else if (rc < n_channels) {
62776d03
BH		 1437 netif_err(efx, drv, efx->net_dev,
1438 "WARNING: Insufficient MSI-X vectors"
a16e5b24 1439 " available (%d < %u).\n", rc, n_channels);
62776d03
BH		 1440 netif_err(efx, drv, efx->net_dev,
1441 "WARNING: Performance may be reduced.\n");
a4900ac9 1442 n_channels = rc;
8ceee660
BH		 1443 }
1444
184603d8 1445 if (rc > 0) {
a4900ac9 1446 efx->n_channels = n_channels;
7f967c01
BH		 1447 if (n_channels > extra_channels)
1448 n_channels -= extra_channels;
b0fbdae1
SS		 1449 if (efx_separate_tx_channels) {
1450 efx->n_tx_channels = min(max(n_channels / 2,
1451 1U),
1452 efx->max_tx_channels);
7f967c01
BH		 1453 efx->n_rx_channels = max(n_channels -
1454 efx->n_tx_channels,
1455 1U);
a4900ac9 1456 } else {
b0fbdae1
SS		 1457 efx->n_tx_channels = min(n_channels,
1458 efx->max_tx_channels);
7f967c01 1459 efx->n_rx_channels = n_channels;
a4900ac9 1460 }
7f967c01 1461 for (i = 0; i < efx->n_channels; i++)
f7d12cdc
BH		 1462 efx_get_channel(efx, i)->irq =
1463 xentries[i].vector;
8ceee660
BH		 1464 }
1465 }
1466
1467 /* Try single interrupt MSI */
1468 if (efx->interrupt_mode == EFX_INT_MODE_MSI) {
28b581ab 1469 efx->n_channels = 1;
a4900ac9
BH		 1470 efx->n_rx_channels = 1;
1471 efx->n_tx_channels = 1;
8ceee660
BH		 1472 rc = pci_enable_msi(efx->pci_dev);
1473 if (rc == 0) {
f7d12cdc 1474 efx_get_channel(efx, 0)->irq = efx->pci_dev->irq;
8ceee660 1475 } else {
62776d03
BH		 1476 netif_err(efx, drv, efx->net_dev,
1477 "could not enable MSI\n");
62980cb6
AR		 1478 if (efx->type->min_interrupt_mode >= EFX_INT_MODE_LEGACY)
1479 efx->interrupt_mode = EFX_INT_MODE_LEGACY;
1480 else
1481 return rc;
8ceee660
BH		 1482 }
1483 }
1484
1485 /* Assume legacy interrupts */
1486 if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) {
b0fbdae1 1487 efx->n_channels = 1 + (efx_separate_tx_channels ? 1 : 0);
a4900ac9
BH		 1488 efx->n_rx_channels = 1;
1489 efx->n_tx_channels = 1;
8ceee660
BH		 1490 efx->legacy_irq = efx->pci_dev->irq;
1491 }
64d8ad6d 1492
7f967c01
BH		 1493 /* Assign extra channels if possible */
1494 j = efx->n_channels;
1495 for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) {
1496 if (!efx->extra_channel_type[i])
1497 continue;
1498 if (efx->interrupt_mode != EFX_INT_MODE_MSIX ||
1499 efx->n_channels <= extra_channels) {
1500 efx->extra_channel_type[i]->handle_no_channel(efx);
1501 } else {
1502 --j;
1503 efx_get_channel(efx, j)->type =
1504 efx->extra_channel_type[i];
1505 }
1506 }
1507
cd2d5b52 1508 /* RSS might be usable on VFs even if it is disabled on the PF */
7fa8d547
SS		 1509#ifdef CONFIG_SFC_SRIOV
1510 if (efx->type->sriov_wanted) {
1511 efx->rss_spread = ((efx->n_rx_channels > 1 ||
1512 !efx->type->sriov_wanted(efx)) ?
1513 efx->n_rx_channels : efx_vf_size(efx));
1514 return 0;
1515 }
1516#endif
1517 efx->rss_spread = efx->n_rx_channels;
cd2d5b52 1518
64d8ad6d 1519 return 0;
8ceee660
BH		 1520}
1521
261e4d96 1522static int efx_soft_enable_interrupts(struct efx_nic *efx)
9f2cb71c 1523{
261e4d96
JC		 1524 struct efx_channel *channel, *end_channel;
1525 int rc;
9f2cb71c 1526
8b7325b4
BH		 1527 BUG_ON(efx->state == STATE_DISABLED);
1528
d8291187
BH		 1529 efx->irq_soft_enabled = true;
1530 smp_wmb();
9f2cb71c
BH		 1531
1532 efx_for_each_channel(channel, efx) {
261e4d96
JC		 1533 if (!channel->type->keep_eventq) {
1534 rc = efx_init_eventq(channel);
1535 if (rc)
1536 goto fail;
1537 }
9f2cb71c
BH		 1538 efx_start_eventq(channel);
1539 }
1540
1541 efx_mcdi_mode_event(efx);
261e4d96
JC		 1542
1543 return 0;
1544fail:
1545 end_channel = channel;
1546 efx_for_each_channel(channel, efx) {
1547 if (channel == end_channel)
1548 break;
1549 efx_stop_eventq(channel);
1550 if (!channel->type->keep_eventq)
1551 efx_fini_eventq(channel);
1552 }
1553
1554 return rc;
9f2cb71c
BH		 1555}
1556
d8291187 1557static void efx_soft_disable_interrupts(struct efx_nic *efx)
9f2cb71c
BH		 1558{
1559 struct efx_channel *channel;
1560
8b7325b4
BH		 1561 if (efx->state == STATE_DISABLED)
1562 return;
1563
9f2cb71c
BH		 1564 efx_mcdi_mode_poll(efx);
1565
d8291187
BH		 1566 efx->irq_soft_enabled = false;
1567 smp_wmb();
1568
1569 if (efx->legacy_irq)
9f2cb71c 1570 synchronize_irq(efx->legacy_irq);
9f2cb71c
BH		 1571
1572 efx_for_each_channel(channel, efx) {
1573 if (channel->irq)
1574 synchronize_irq(channel->irq);
1575
1576 efx_stop_eventq(channel);
d8291187 1577 if (!channel->type->keep_eventq)
7f967c01 1578 efx_fini_eventq(channel);
9f2cb71c 1579 }
cade715f
BH		 1580
1581 /* Flush the asynchronous MCDI request queue */
1582 efx_mcdi_flush_async(efx);
9f2cb71c
BH		 1583}
1584
261e4d96 1585static int efx_enable_interrupts(struct efx_nic *efx)
d8291187 1586{
261e4d96
JC		 1587 struct efx_channel *channel, *end_channel;
1588 int rc;
d8291187
BH		 1589
1590 BUG_ON(efx->state == STATE_DISABLED);
1591
1592 if (efx->eeh_disabled_legacy_irq) {
1593 enable_irq(efx->legacy_irq);
1594 efx->eeh_disabled_legacy_irq = false;
1595 }
1596
86094f7f 1597 efx->type->irq_enable_master(efx);
d8291187
BH		 1598
1599 efx_for_each_channel(channel, efx) {
261e4d96
JC		 1600 if (channel->type->keep_eventq) {
1601 rc = efx_init_eventq(channel);
1602 if (rc)
1603 goto fail;
1604 }
1605 }
1606
1607 rc = efx_soft_enable_interrupts(efx);
1608 if (rc)
1609 goto fail;
1610
1611 return 0;
1612
1613fail:
1614 end_channel = channel;
1615 efx_for_each_channel(channel, efx) {
1616 if (channel == end_channel)
1617 break;
d8291187 1618 if (channel->type->keep_eventq)
261e4d96 1619 efx_fini_eventq(channel);
d8291187
BH		 1620 }
1621
261e4d96
JC		 1622 efx->type->irq_disable_non_ev(efx);
1623
1624 return rc;
d8291187
BH		 1625}
1626
1627static void efx_disable_interrupts(struct efx_nic *efx)
1628{
1629 struct efx_channel *channel;
1630
1631 efx_soft_disable_interrupts(efx);
1632
1633 efx_for_each_channel(channel, efx) {
1634 if (channel->type->keep_eventq)
1635 efx_fini_eventq(channel);
1636 }
1637
86094f7f 1638 efx->type->irq_disable_non_ev(efx);
d8291187
BH		 1639}
1640
8ceee660
BH		 1641static void efx_remove_interrupts(struct efx_nic *efx)
1642{
1643 struct efx_channel *channel;
1644
1645 /* Remove MSI/MSI-X interrupts */
64ee3120 1646 efx_for_each_channel(channel, efx)
8ceee660
BH		 1647 channel->irq = 0;
1648 pci_disable_msi(efx->pci_dev);
1649 pci_disable_msix(efx->pci_dev);
1650
1651 /* Remove legacy interrupt */
1652 efx->legacy_irq = 0;
1653}
1654
8831da7b 1655static void efx_set_channels(struct efx_nic *efx)
8ceee660 1656{
602a5322
BH		 1657 struct efx_channel *channel;
1658 struct efx_tx_queue *tx_queue;
1659
97653431 1660 efx->tx_channel_offset =
b0fbdae1
SS		 1661 efx_separate_tx_channels ?
1662 efx->n_channels - efx->n_tx_channels : 0;
602a5322 1663
79d68b37
SH		 1664 /* We need to mark which channels really have RX and TX
1665 * queues, and adjust the TX queue numbers if we have separate
602a5322
BH		 1666 * RX-only and TX-only channels.
1667 */
1668 efx_for_each_channel(channel, efx) {
79d68b37
SH		 1669 if (channel->channel < efx->n_rx_channels)
1670 channel->rx_queue.core_index = channel->channel;
1671 else
1672 channel->rx_queue.core_index = -1;
1673
602a5322
BH		 1674 efx_for_each_channel_tx_queue(tx_queue, channel)
1675 tx_queue->queue -= (efx->tx_channel_offset *
1676 EFX_TXQ_TYPES);
1677 }
8ceee660
BH		 1678}
1679
1680static int efx_probe_nic(struct efx_nic *efx)
1681{
1682 int rc;
1683
62776d03 1684 netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
8ceee660
BH		 1685
1686 /* Carry out hardware-type specific initialisation */
ef2b90ee 1687 rc = efx->type->probe(efx);
8ceee660
BH		 1688 if (rc)
1689 return rc;
1690
b0fbdae1
SS		 1691 do {
1692 if (!efx->max_channels || !efx->max_tx_channels) {
1693 netif_err(efx, drv, efx->net_dev,
1694 "Insufficient resources to allocate"
1695 " any channels\n");
1696 rc = -ENOSPC;
1697 goto fail1;
1698 }
8ceee660 1699
b0fbdae1
SS		 1700 /* Determine the number of channels and queues by trying
1701 * to hook in MSI-X interrupts.
1702 */
1703 rc = efx_probe_interrupts(efx);
1704 if (rc)
1705 goto fail1;
52ad762b 1706
b0fbdae1
SS		 1707 efx_set_channels(efx);
1708
1709 /* dimension_resources can fail with EAGAIN */
1710 rc = efx->type->dimension_resources(efx);
1711 if (rc != 0 && rc != -EAGAIN)
1712 goto fail2;
1713
1714 if (rc == -EAGAIN)
1715 /* try again with new max_channels */
1716 efx_remove_interrupts(efx);
1717
1718 } while (rc == -EAGAIN);
28e47c49 1719
5d3a6fca 1720 if (efx->n_channels > 1)
267c0157
JC		 1721 netdev_rss_key_fill(&efx->rx_hash_key,
1722 sizeof(efx->rx_hash_key));
1723 efx_set_default_rx_indir_table(efx);
5d3a6fca 1724
c4f4adc7
BH		 1725 netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels);
1726 netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels);
8ceee660
BH		 1727
1728 /* Initialise the interrupt moderation settings */
539de7c5 1729 efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000);
9e393b30
BH		 1730 efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true,
1731 true);
8ceee660
BH		 1732
1733 return 0;
64d8ad6d 1734
c15eed22
BH		 1735fail2:
1736 efx_remove_interrupts(efx);
1737fail1:
64d8ad6d
BH		 1738 efx->type->remove(efx);
1739 return rc;
8ceee660
BH		 1740}
1741
1742static void efx_remove_nic(struct efx_nic *efx)
1743{
62776d03 1744 netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");
8ceee660
BH		 1745
1746 efx_remove_interrupts(efx);
ef2b90ee 1747 efx->type->remove(efx);
8ceee660
BH		 1748}
1749
add72477
BH		 1750static int efx_probe_filters(struct efx_nic *efx)
1751{
1752 int rc;
1753
1754 spin_lock_init(&efx->filter_lock);
0d322413 1755 init_rwsem(&efx->filter_sem);
d248953a 1756 mutex_lock(&efx->mac_lock);
0d322413 1757 down_write(&efx->filter_sem);
add72477
BH		 1758 rc = efx->type->filter_table_probe(efx);
1759 if (rc)
0d322413 1760 goto out_unlock;
add72477
BH		 1761
1762#ifdef CONFIG_RFS_ACCEL
1763 if (efx->type->offload_features & NETIF_F_NTUPLE) {
faf8dcc1
JC		 1764 struct efx_channel *channel;
1765 int i, success = 1;
1766
1767 efx_for_each_channel(channel, efx) {
1768 channel->rps_flow_id =
1769 kcalloc(efx->type->max_rx_ip_filters,
1770 sizeof(*channel->rps_flow_id),
1771 GFP_KERNEL);
1772 if (!channel->rps_flow_id)
1773 success = 0;
1774 else
1775 for (i = 0;
1776 i < efx->type->max_rx_ip_filters;
1777 ++i)
1778 channel->rps_flow_id[i] =
1779 RPS_FLOW_ID_INVALID;
1780 }
1781
1782 if (!success) {
1783 efx_for_each_channel(channel, efx)
1784 kfree(channel->rps_flow_id);
add72477 1785 efx->type->filter_table_remove(efx);
0d322413
EC		 1786 rc = -ENOMEM;
1787 goto out_unlock;
add72477 1788 }
faf8dcc1
JC		 1789
1790 efx->rps_expire_index = efx->rps_expire_channel = 0;
add72477
BH		 1791 }
1792#endif
0d322413
EC		 1793out_unlock:
1794 up_write(&efx->filter_sem);
d248953a 1795 mutex_unlock(&efx->mac_lock);
0d322413 1796 return rc;
add72477
BH		 1797}
1798
1799static void efx_remove_filters(struct efx_nic *efx)
1800{
1801#ifdef CONFIG_RFS_ACCEL
faf8dcc1
JC		 1802 struct efx_channel *channel;
1803
1804 efx_for_each_channel(channel, efx)
1805 kfree(channel->rps_flow_id);
add72477 1806#endif
0d322413 1807 down_write(&efx->filter_sem);
add72477 1808 efx->type->filter_table_remove(efx);
0d322413 1809 up_write(&efx->filter_sem);
add72477
BH		 1810}
1811
1812static void efx_restore_filters(struct efx_nic *efx)
1813{
0d322413 1814 down_read(&efx->filter_sem);
add72477 1815 efx->type->filter_table_restore(efx);
0d322413 1816 up_read(&efx->filter_sem);
add72477
BH		 1817}
1818
8ceee660
BH		 1819/**************************************************************************
1820 *
1821 * NIC startup/shutdown
1822 *
1823 *************************************************************************/
1824
1825static int efx_probe_all(struct efx_nic *efx)
1826{
8ceee660
BH		 1827 int rc;
1828
8ceee660
BH		 1829 rc = efx_probe_nic(efx);
1830 if (rc) {
62776d03 1831 netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
8ceee660
BH		 1832 goto fail1;
1833 }
1834
8ceee660
BH		 1835 rc = efx_probe_port(efx);
1836 if (rc) {
62776d03 1837 netif_err(efx, probe, efx->net_dev, "failed to create port\n");
8ceee660
BH		 1838 goto fail2;
1839 }
1840
7e6d06f0
BH		 1841 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT);
1842 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) {
1843 rc = -EINVAL;
1844 goto fail3;
1845 }
ecc910f5 1846 efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE;
8ceee660 1847
6d8aaaf6
DP		 1848#ifdef CONFIG_SFC_SRIOV
1849 rc = efx->type->vswitching_probe(efx);
1850 if (rc) /* not fatal; the PF will still work fine */
1851 netif_warn(efx, probe, efx->net_dev,
1852 "failed to setup vswitching rc=%d;"
1853 " VFs may not function\n", rc);
1854#endif
1855
64eebcfd
BH		 1856 rc = efx_probe_filters(efx);
1857 if (rc) {
1858 netif_err(efx, probe, efx->net_dev,
1859 "failed to create filter tables\n");
6d8aaaf6 1860 goto fail4;
64eebcfd
BH		 1861 }
1862
7f967c01
BH		 1863 rc = efx_probe_channels(efx);
1864 if (rc)
6d8aaaf6 1865 goto fail5;
7f967c01 1866
8ceee660
BH		 1867 return 0;
1868
6d8aaaf6 1869 fail5:
7f967c01 1870 efx_remove_filters(efx);
6d8aaaf6
DP		 1871 fail4:
1872#ifdef CONFIG_SFC_SRIOV
1873 efx->type->vswitching_remove(efx);
1874#endif
8ceee660 1875 fail3:
8ceee660
BH		 1876 efx_remove_port(efx);
1877 fail2:
1878 efx_remove_nic(efx);
1879 fail1:
1880 return rc;
1881}
1882
8b7325b4
BH		 1883/* If the interface is supposed to be running but is not, start
1884 * the hardware and software data path, regular activity for the port
1885 * (MAC statistics, link polling, etc.) and schedule the port to be
1886 * reconfigured. Interrupts must already be enabled. This function
1887 * is safe to call multiple times, so long as the NIC is not disabled.
1888 * Requires the RTNL lock.
9f2cb71c 1889 */
8ceee660
BH		 1890static void efx_start_all(struct efx_nic *efx)
1891{
8ceee660 1892 EFX_ASSERT_RESET_SERIALISED(efx);
8b7325b4 1893 BUG_ON(efx->state == STATE_DISABLED);
8ceee660
BH		 1894
1895 /* Check that it is appropriate to restart the interface. All
1896 * of these flags are safe to read under just the rtnl lock */
e283546c
EC		 1897 if (efx->port_enabled || !netif_running(efx->net_dev) ||
1898 efx->reset_pending)
8ceee660
BH		 1899 return;
1900
8ceee660 1901 efx_start_port(efx);
9f2cb71c 1902 efx_start_datapath(efx);
8880f4ec 1903
626950db
AR		 1904 /* Start the hardware monitor if there is one */
1905 if (efx->type->monitor != NULL)
8ceee660
BH		 1906 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1907 efx_monitor_interval);
626950db 1908
5a6681e2 1909 /* Link state detection is normally event-driven; we have
626950db
AR		 1910 * to poll now because we could have missed a change
1911 */
5a6681e2
EC		 1912 mutex_lock(&efx->mac_lock);
1913 if (efx->phy_op->poll(efx))
1914 efx_link_status_changed(efx);
1915 mutex_unlock(&efx->mac_lock);
55edc6e6 1916
ef2b90ee 1917 efx->type->start_stats(efx);
f8f3b5ae
JC		 1918 efx->type->pull_stats(efx);
1919 spin_lock_bh(&efx->stats_lock);
1920 efx->type->update_stats(efx, NULL, NULL);
1921 spin_unlock_bh(&efx->stats_lock);
8ceee660
BH		 1922}
1923
8b7325b4
BH		 1924/* Quiesce the hardware and software data path, and regular activity
1925 * for the port without bringing the link down. Safe to call multiple
1926 * times with the NIC in almost any state, but interrupts should be
1927 * enabled. Requires the RTNL lock.
1928 */
8ceee660
BH		 1929static void efx_stop_all(struct efx_nic *efx)
1930{
8ceee660
BH		 1931 EFX_ASSERT_RESET_SERIALISED(efx);
1932
1933 /* port_enabled can be read safely under the rtnl lock */
1934 if (!efx->port_enabled)
1935 return;
1936
f8f3b5ae
JC		 1937 /* update stats before we go down so we can accurately count
1938 * rx_nodesc_drops
1939 */
1940 efx->type->pull_stats(efx);
1941 spin_lock_bh(&efx->stats_lock);
1942 efx->type->update_stats(efx, NULL, NULL);
1943 spin_unlock_bh(&efx->stats_lock);
ef2b90ee 1944 efx->type->stop_stats(efx);
8ceee660
BH		 1945 efx_stop_port(efx);
1946
29c69a48
BH		 1947 /* Stop the kernel transmit interface. This is only valid if
1948 * the device is stopped or detached; otherwise the watchdog
1949 * may fire immediately.
1950 */
1951 WARN_ON(netif_running(efx->net_dev) &&
1952 netif_device_present(efx->net_dev));
9f2cb71c
BH		 1953 netif_tx_disable(efx->net_dev);
1954
1955 efx_stop_datapath(efx);
8ceee660
BH		 1956}
1957
1958static void efx_remove_all(struct efx_nic *efx)
1959{
4642610c 1960 efx_remove_channels(efx);
7f967c01 1961 efx_remove_filters(efx);
6d8aaaf6
DP		 1962#ifdef CONFIG_SFC_SRIOV
1963 efx->type->vswitching_remove(efx);
1964#endif
8ceee660
BH		 1965 efx_remove_port(efx);
1966 efx_remove_nic(efx);
1967}
1968
8ceee660
BH		 1969/**************************************************************************
1970 *
1971 * Interrupt moderation
1972 *
1973 **************************************************************************/
539de7c5 1974unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs)
0d86ebd8 1975{
b548f976
BH		 1976 if (usecs == 0)
1977 return 0;
539de7c5 1978 if (usecs * 1000 < efx->timer_quantum_ns)
0d86ebd8 1979 return 1; /* never round down to 0 */
539de7c5
BK		 1980 return usecs * 1000 / efx->timer_quantum_ns;
1981}
1982
1983unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks)
1984{
1985 /* We must round up when converting ticks to microseconds
1986 * because we round down when converting the other way.
1987 */
1988 return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000);
0d86ebd8
BH		 1989}
1990
8ceee660 1991/* Set interrupt moderation parameters */
9e393b30
BH		 1992int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
1993 unsigned int rx_usecs, bool rx_adaptive,
1994 bool rx_may_override_tx)
8ceee660 1995{
f7d12cdc 1996 struct efx_channel *channel;
d95e329a
BK		 1997 unsigned int timer_max_us;
1998
8ceee660
BH		 1999 EFX_ASSERT_RESET_SERIALISED(efx);
2000
d95e329a
BK		 2001 timer_max_us = efx->timer_max_ns / 1000;
2002
2003 if (tx_usecs > timer_max_us || rx_usecs > timer_max_us)
9e393b30
BH		 2004 return -EINVAL;
2005
539de7c5 2006 if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 &&
9e393b30
BH		 2007 !rx_may_override_tx) {
2008 netif_err(efx, drv, efx->net_dev, "Channels are shared. "
2009 "RX and TX IRQ moderation must be equal\n");
2010 return -EINVAL;
2011 }
2012
6fb70fd1 2013 efx->irq_rx_adaptive = rx_adaptive;
539de7c5 2014 efx->irq_rx_moderation_us = rx_usecs;
f7d12cdc 2015 efx_for_each_channel(channel, efx) {
525da907 2016 if (efx_channel_has_rx_queue(channel))
539de7c5 2017 channel->irq_moderation_us = rx_usecs;
525da907 2018 else if (efx_channel_has_tx_queues(channel))
539de7c5 2019 channel->irq_moderation_us = tx_usecs;
f7d12cdc 2020 }
9e393b30
BH		 2021
2022 return 0;
8ceee660
BH		 2023}
2024
a0c4faf5
BH		 2025void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
2026 unsigned int *rx_usecs, bool *rx_adaptive)
2027{
2028 *rx_adaptive = efx->irq_rx_adaptive;
539de7c5 2029 *rx_usecs = efx->irq_rx_moderation_us;
a0c4faf5
BH		 2030
2031 /* If channels are shared between RX and TX, so is IRQ
2032 * moderation. Otherwise, IRQ moderation is the same for all
2033 * TX channels and is not adaptive.
2034 */
539de7c5 2035 if (efx->tx_channel_offset == 0) {
a0c4faf5 2036 *tx_usecs = *rx_usecs;
539de7c5
BK		 2037 } else {
2038 struct efx_channel *tx_channel;
2039
2040 tx_channel = efx->channel[efx->tx_channel_offset];
2041 *tx_usecs = tx_channel->irq_moderation_us;
2042 }
a0c4faf5
BH		 2043}
2044
8ceee660
BH		 2045/**************************************************************************
2046 *
2047 * Hardware monitor
2048 *
2049 **************************************************************************/
2050
e254c274 2051/* Run periodically off the general workqueue */
8ceee660
BH		 2052static void efx_monitor(struct work_struct *data)
2053{
2054 struct efx_nic *efx = container_of(data, struct efx_nic,
2055 monitor_work.work);
8ceee660 2056
62776d03
BH		 2057 netif_vdbg(efx, timer, efx->net_dev,
2058 "hardware monitor executing on CPU %d\n",
2059 raw_smp_processor_id());
ef2b90ee 2060 BUG_ON(efx->type->monitor == NULL);
8ceee660 2061
8ceee660
BH		 2062 /* If the mac_lock is already held then it is likely a port
2063 * reconfiguration is already in place, which will likely do
e254c274
BH		 2064 * most of the work of monitor() anyway. */
2065 if (mutex_trylock(&efx->mac_lock)) {
2066 if (efx->port_enabled)
2067 efx->type->monitor(efx);
2068 mutex_unlock(&efx->mac_lock);
2069 }
8ceee660 2070
8ceee660
BH		 2071 queue_delayed_work(efx->workqueue, &efx->monitor_work,
2072 efx_monitor_interval);
2073}
2074
2075/**************************************************************************
2076 *
2077 * ioctls
2078 *
2079 *************************************************************************/
2080
2081/* Net device ioctl
2082 * Context: process, rtnl_lock() held.
2083 */
2084static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
2085{
767e468c 2086 struct efx_nic *efx = netdev_priv(net_dev);
68e7f45e 2087 struct mii_ioctl_data *data = if_mii(ifr);
8ceee660 2088
7c236c43 2089 if (cmd == SIOCSHWTSTAMP)
433dc9b3
BH		 2090 return efx_ptp_set_ts_config(efx, ifr);
2091 if (cmd == SIOCGHWTSTAMP)
2092 return efx_ptp_get_ts_config(efx, ifr);
7c236c43 2093
68e7f45e
BH		 2094 /* Convert phy_id from older PRTAD/DEVAD format */
2095 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
2096 (data->phy_id & 0xfc00) == 0x0400)
2097 data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;
2098
2099 return mdio_mii_ioctl(&efx->mdio, data, cmd);
8ceee660
BH		 2100}
2101
2102/**************************************************************************
2103 *
2104 * NAPI interface
2105 *
2106 **************************************************************************/
2107
7f967c01
BH		 2108static void efx_init_napi_channel(struct efx_channel *channel)
2109{
2110 struct efx_nic *efx = channel->efx;
2111
2112 channel->napi_dev = efx->net_dev;
2113 netif_napi_add(channel->napi_dev, &channel->napi_str,
2114 efx_poll, napi_weight);
2115}
2116
e8f14992 2117static void efx_init_napi(struct efx_nic *efx)
8ceee660
BH		 2118{
2119 struct efx_channel *channel;
8ceee660 2120
7f967c01
BH		 2121 efx_for_each_channel(channel, efx)
2122 efx_init_napi_channel(channel);
e8f14992
BH		 2123}
2124
2125static void efx_fini_napi_channel(struct efx_channel *channel)
2126{
973334a1 2127 if (channel->napi_dev)
e8f14992 2128 netif_napi_del(&channel->napi_str);
973334a1 2129
e8f14992 2130 channel->napi_dev = NULL;
8ceee660
BH		 2131}
2132
2133static void efx_fini_napi(struct efx_nic *efx)
2134{
2135 struct efx_channel *channel;
2136
e8f14992
BH		 2137 efx_for_each_channel(channel, efx)
2138 efx_fini_napi_channel(channel);
8ceee660
BH		 2139}
2140
2141/**************************************************************************
2142 *
2143 * Kernel netpoll interface
2144 *
2145 *************************************************************************/
2146
2147#ifdef CONFIG_NET_POLL_CONTROLLER
2148
2149/* Although in the common case interrupts will be disabled, this is not
2150 * guaranteed. However, all our work happens inside the NAPI callback,
2151 * so no locking is required.
2152 */
2153static void efx_netpoll(struct net_device *net_dev)
2154{
767e468c 2155 struct efx_nic *efx = netdev_priv(net_dev);
8ceee660
BH		 2156 struct efx_channel *channel;
2157
64ee3120 2158 efx_for_each_channel(channel, efx)
8ceee660
BH		 2159 efx_schedule_channel(channel);
2160}
2161
2162#endif
2163
2164/**************************************************************************
2165 *
2166 * Kernel net device interface
2167 *
2168 *************************************************************************/
2169
2170/* Context: process, rtnl_lock() held. */
e340be92 2171int efx_net_open(struct net_device *net_dev)
8ceee660 2172{
767e468c 2173 struct efx_nic *efx = netdev_priv(net_dev);
8b7325b4
BH		 2174 int rc;
2175
62776d03
BH		 2176 netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
2177 raw_smp_processor_id());
8ceee660 2178
8b7325b4
BH		 2179 rc = efx_check_disabled(efx);
2180 if (rc)
2181 return rc;
f8b87c17
BH		 2182 if (efx->phy_mode & PHY_MODE_SPECIAL)
2183 return -EBUSY;
8880f4ec
BH		 2184 if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
2185 return -EIO;
f8b87c17 2186
78c1f0a0
SH		 2187 /* Notify the kernel of the link state polled during driver load,
2188 * before the monitor starts running */
2189 efx_link_status_changed(efx);
2190
8ceee660 2191 efx_start_all(efx);
9c568fd8
PD		 2192 if (efx->state == STATE_DISABLED || efx->reset_pending)
2193 netif_device_detach(efx->net_dev);
dd40781e 2194 efx_selftest_async_start(efx);
8ceee660
BH		 2195 return 0;
2196}
2197
2198/* Context: process, rtnl_lock() held.
2199 * Note that the kernel will ignore our return code; this method
2200 * should really be a void.
2201 */
e340be92 2202int efx_net_stop(struct net_device *net_dev)
8ceee660 2203{
767e468c 2204 struct efx_nic *efx = netdev_priv(net_dev);
8ceee660 2205
62776d03
BH		 2206 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
2207 raw_smp_processor_id());
8ceee660 2208
8b7325b4
BH		 2209 /* Stop the device and flush all the channels */
2210 efx_stop_all(efx);
8ceee660
BH		 2211
2212 return 0;
2213}
2214
5b9e207c 2215/* Context: process, dev_base_lock or RTNL held, non-blocking. */
bc1f4470 2216static void efx_net_stats(struct net_device *net_dev,
2217 struct rtnl_link_stats64 *stats)
8ceee660 2218{
767e468c 2219 struct efx_nic *efx = netdev_priv(net_dev);
8ceee660 2220
55edc6e6 2221 spin_lock_bh(&efx->stats_lock);
cd0ecc9a 2222 efx->type->update_stats(efx, NULL, stats);
1cb34522 2223 spin_unlock_bh(&efx->stats_lock);
8ceee660
BH		 2224}
2225
2226/* Context: netif_tx_lock held, BHs disabled. */
2227static void efx_watchdog(struct net_device *net_dev)
2228{
767e468c 2229 struct efx_nic *efx = netdev_priv(net_dev);
8ceee660 2230
62776d03
BH		 2231 netif_err(efx, tx_err, efx->net_dev,
2232 "TX stuck with port_enabled=%d: resetting channels\n",
2233 efx->port_enabled);
8ceee660 2234
739bb23d 2235 efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG);
8ceee660
BH		 2236}
2237
2238
2239/* Context: process, rtnl_lock() held. */
2240static int efx_change_mtu(struct net_device *net_dev, int new_mtu)
2241{
767e468c 2242 struct efx_nic *efx = netdev_priv(net_dev);
8b7325b4 2243 int rc;
8ceee660 2244
8b7325b4
BH		 2245 rc = efx_check_disabled(efx);
2246 if (rc)
2247 return rc;
8ceee660 2248
62776d03 2249 netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu);
8ceee660 2250
29c69a48
BH		 2251 efx_device_detach_sync(efx);
2252 efx_stop_all(efx);
2253
d3245b28 2254 mutex_lock(&efx->mac_lock);
8ceee660 2255 net_dev->mtu = new_mtu;
0d322413 2256 efx_mac_reconfigure(efx);
d3245b28
BH		 2257 mutex_unlock(&efx->mac_lock);
2258
8ceee660 2259 efx_start_all(efx);
9c568fd8 2260 efx_device_attach_if_not_resetting(efx);
6c8eef4a 2261 return 0;
8ceee660
BH		 2262}
2263
2264static int efx_set_mac_address(struct net_device *net_dev, void *data)
2265{
767e468c 2266 struct efx_nic *efx = netdev_priv(net_dev);
8ceee660 2267 struct sockaddr *addr = data;
e0b3ae30 2268 u8 *new_addr = addr->sa_data;
cfc77c2f
SS		 2269 u8 old_addr[6];
2270 int rc;
8ceee660 2271
8ceee660 2272 if (!is_valid_ether_addr(new_addr)) {
62776d03
BH		 2273 netif_err(efx, drv, efx->net_dev,
2274 "invalid ethernet MAC address requested: %pM\n",
2275 new_addr);
504f9b5a 2276 return -EADDRNOTAVAIL;
8ceee660
BH		 2277 }
2278
cfc77c2f
SS		 2279 /* save old address */
2280 ether_addr_copy(old_addr, net_dev->dev_addr);
cd84ff4d 2281 ether_addr_copy(net_dev->dev_addr, new_addr);
910c8789
SS		 2282 if (efx->type->set_mac_address) {
2283 rc = efx->type->set_mac_address(efx);
cfc77c2f
SS		 2284 if (rc) {
2285 ether_addr_copy(net_dev->dev_addr, old_addr);
2286 return rc;
2287 }
2288 }
8ceee660
BH		 2289
2290 /* Reconfigure the MAC */
d3245b28 2291 mutex_lock(&efx->mac_lock);
0d322413 2292 efx_mac_reconfigure(efx);
d3245b28 2293 mutex_unlock(&efx->mac_lock);
8ceee660
BH		 2294
2295 return 0;
2296}
2297
a816f75a 2298/* Context: netif_addr_lock held, BHs disabled. */
0fca8c97 2299static void efx_set_rx_mode(struct net_device *net_dev)
8ceee660 2300{
767e468c 2301 struct efx_nic *efx = netdev_priv(net_dev);
a816f75a 2302
8be4f3e6
BH		 2303 if (efx->port_enabled)
2304 queue_work(efx->workqueue, &efx->mac_work);
2305 /* Otherwise efx_start_port() will do this */
8ceee660
BH		 2306}
2307
c8f44aff 2308static int efx_set_features(struct net_device *net_dev, netdev_features_t data)
abfe9039
BH		 2309{
2310 struct efx_nic *efx = netdev_priv(net_dev);
4a53ea8a 2311 int rc;
abfe9039
BH		 2312
2313 /* If disabling RX n-tuple filtering, clear existing filters */
4a53ea8a
AR		 2314 if (net_dev->features & ~data & NETIF_F_NTUPLE) {
2315 rc = efx->type->filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL);
2316 if (rc)
2317 return rc;
2318 }
2319
2320 /* If Rx VLAN filter is changed, update filters via mac_reconfigure */
2321 if ((net_dev->features ^ data) & NETIF_F_HW_VLAN_CTAG_FILTER) {
2322 /* efx_set_rx_mode() will schedule MAC work to update filters
2323 * when a new features are finally set in net_dev.
2324 */
2325 efx_set_rx_mode(net_dev);
2326 }
abfe9039
BH		 2327
2328 return 0;
2329}
2330
b40296fc
WY		 2331static int efx_get_phys_port_id(struct net_device *net_dev,
2332 struct netdev_phys_item_id *ppid)
08a7b29b
BK		 2333{
2334 struct efx_nic *efx = netdev_priv(net_dev);
2335
2336 if (efx->type->get_phys_port_id)
2337 return efx->type->get_phys_port_id(efx, ppid);
2338 else
2339 return -EOPNOTSUPP;
2340}
2341
ac019f08
BK		 2342static int efx_get_phys_port_name(struct net_device *net_dev,
2343 char *name, size_t len)
2344{
2345 struct efx_nic *efx = netdev_priv(net_dev);
2346
2347 if (snprintf(name, len, "p%u", efx->port_num) >= len)
2348 return -EINVAL;
2349 return 0;
2350}
2351
4a53ea8a
AR		 2352static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid)
2353{
2354 struct efx_nic *efx = netdev_priv(net_dev);
2355
2356 if (efx->type->vlan_rx_add_vid)
2357 return efx->type->vlan_rx_add_vid(efx, proto, vid);
2358 else
2359 return -EOPNOTSUPP;
2360}
2361
2362static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid)
2363{
2364 struct efx_nic *efx = netdev_priv(net_dev);
2365
2366 if (efx->type->vlan_rx_kill_vid)
2367 return efx->type->vlan_rx_kill_vid(efx, proto, vid);
2368 else
2369 return -EOPNOTSUPP;
2370}
2371
e5fbd977
JC		 2372static int efx_udp_tunnel_type_map(enum udp_parsable_tunnel_type in)
2373{
2374 switch (in) {
2375 case UDP_TUNNEL_TYPE_VXLAN:
2376 return TUNNEL_ENCAP_UDP_PORT_ENTRY_VXLAN;
2377 case UDP_TUNNEL_TYPE_GENEVE:
2378 return TUNNEL_ENCAP_UDP_PORT_ENTRY_GENEVE;
2379 default:
2380 return -1;
2381 }
2382}
2383
2384static void efx_udp_tunnel_add(struct net_device *dev, struct udp_tunnel_info *ti)
2385{
2386 struct efx_nic *efx = netdev_priv(dev);
2387 struct efx_udp_tunnel tnl;
2388 int efx_tunnel_type;
2389
2390 efx_tunnel_type = efx_udp_tunnel_type_map(ti->type);
2391 if (efx_tunnel_type < 0)
2392 return;
2393
2394 tnl.type = (u16)efx_tunnel_type;
2395 tnl.port = ti->port;
2396
2397 if (efx->type->udp_tnl_add_port)
2398 (void)efx->type->udp_tnl_add_port(efx, tnl);
2399}
2400
2401static void efx_udp_tunnel_del(struct net_device *dev, struct udp_tunnel_info *ti)
2402{
2403 struct efx_nic *efx = netdev_priv(dev);
2404 struct efx_udp_tunnel tnl;
2405 int efx_tunnel_type;
2406
2407 efx_tunnel_type = efx_udp_tunnel_type_map(ti->type);
2408 if (efx_tunnel_type < 0)
2409 return;
2410
2411 tnl.type = (u16)efx_tunnel_type;
2412 tnl.port = ti->port;
2413
c04ca616 2414 if (efx->type->udp_tnl_del_port)
e5fbd977
JC		 2415 (void)efx->type->udp_tnl_del_port(efx, tnl);
2416}
2417
7fa8d547 2418static const struct net_device_ops efx_netdev_ops = {
c3ecb9f3
SH		 2419 .ndo_open = efx_net_open,
2420 .ndo_stop = efx_net_stop,
4472702e 2421 .ndo_get_stats64 = efx_net_stats,
c3ecb9f3
SH		 2422 .ndo_tx_timeout = efx_watchdog,
2423 .ndo_start_xmit = efx_hard_start_xmit,
2424 .ndo_validate_addr = eth_validate_addr,
2425 .ndo_do_ioctl = efx_ioctl,
2426 .ndo_change_mtu = efx_change_mtu,
2427 .ndo_set_mac_address = efx_set_mac_address,
0fca8c97 2428 .ndo_set_rx_mode = efx_set_rx_mode,
abfe9039 2429 .ndo_set_features = efx_set_features,
4a53ea8a
AR		 2430 .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid,
2431 .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid,
cd2d5b52 2432#ifdef CONFIG_SFC_SRIOV
7fa8d547
SS		 2433 .ndo_set_vf_mac = efx_sriov_set_vf_mac,
2434 .ndo_set_vf_vlan = efx_sriov_set_vf_vlan,
2435 .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk,
2436 .ndo_get_vf_config = efx_sriov_get_vf_config,
4392dc69 2437 .ndo_set_vf_link_state = efx_sriov_set_vf_link_state,
cd2d5b52 2438#endif
08a7b29b 2439 .ndo_get_phys_port_id = efx_get_phys_port_id,
ac019f08 2440 .ndo_get_phys_port_name = efx_get_phys_port_name,
c3ecb9f3
SH		 2441#ifdef CONFIG_NET_POLL_CONTROLLER
2442 .ndo_poll_controller = efx_netpoll,
2443#endif
94b274bf 2444 .ndo_setup_tc = efx_setup_tc,
64d8ad6d
BH		 2445#ifdef CONFIG_RFS_ACCEL
2446 .ndo_rx_flow_steer = efx_filter_rfs,
2447#endif
e5fbd977
JC		 2448 .ndo_udp_tunnel_add = efx_udp_tunnel_add,
2449 .ndo_udp_tunnel_del = efx_udp_tunnel_del,
c3ecb9f3
SH		 2450};
2451
7dde596e
BH		 2452static void efx_update_name(struct efx_nic *efx)
2453{
2454 strcpy(efx->name, efx->net_dev->name);
2455 efx_mtd_rename(efx);
2456 efx_set_channel_names(efx);
2457}
2458
8ceee660
BH		 2459static int efx_netdev_event(struct notifier_block *this,
2460 unsigned long event, void *ptr)
2461{
351638e7 2462 struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
8ceee660 2463
7fa8d547 2464 if ((net_dev->netdev_ops == &efx_netdev_ops) &&
7dde596e
BH		 2465 event == NETDEV_CHANGENAME)
2466 efx_update_name(netdev_priv(net_dev));
8ceee660
BH		 2467
2468 return NOTIFY_DONE;
2469}
2470
2471static struct notifier_block efx_netdev_notifier = {
2472 .notifier_call = efx_netdev_event,
2473};
2474
06d5e193
BH		 2475static ssize_t
2476show_phy_type(struct device *dev, struct device_attribute *attr, char *buf)
2477{
2478 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2479 return sprintf(buf, "%d\n", efx->phy_type);
2480}
776fbcc9 2481static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL);
06d5e193 2482
e7fef9b4
EC		 2483#ifdef CONFIG_SFC_MCDI_LOGGING
2484static ssize_t show_mcdi_log(struct device *dev, struct device_attribute *attr,
2485 char *buf)
2486{
2487 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2488 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
2489
2490 return scnprintf(buf, PAGE_SIZE, "%d\n", mcdi->logging_enabled);
2491}
2492static ssize_t set_mcdi_log(struct device *dev, struct device_attribute *attr,
2493 const char *buf, size_t count)
2494{
2495 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2496 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
2497 bool enable = count > 0 && *buf != '0';
2498
2499 mcdi->logging_enabled = enable;
2500 return count;
2501}
2502static DEVICE_ATTR(mcdi_logging, 0644, show_mcdi_log, set_mcdi_log);
2503#endif
2504
8ceee660
BH		 2505static int efx_register_netdev(struct efx_nic *efx)
2506{
2507 struct net_device *net_dev = efx->net_dev;
c04bfc6b 2508 struct efx_channel *channel;
8ceee660
BH		 2509 int rc;
2510
2511 net_dev->watchdog_timeo = 5 * HZ;
2512 net_dev->irq = efx->pci_dev->irq;
7fa8d547
SS		 2513 net_dev->netdev_ops = &efx_netdev_ops;
2514 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)
8127d661 2515 net_dev->priv_flags |= IFF_UNICAST_FLT;
7ad24ea4 2516 net_dev->ethtool_ops = &efx_ethtool_ops;
7e6d06f0 2517 net_dev->gso_max_segs = EFX_TSO_MAX_SEGS;
cd94e519
BK		 2518 net_dev->min_mtu = EFX_MIN_MTU;
2519 net_dev->max_mtu = EFX_MAX_MTU;
8ceee660 2520
7dde596e 2521 rtnl_lock();
aed0628d 2522
7153f623
BH		 2523 /* Enable resets to be scheduled and check whether any were
2524 * already requested. If so, the NIC is probably hosed so we
2525 * abort.
2526 */
2527 efx->state = STATE_READY;
2528 smp_mb(); /* ensure we change state before checking reset_pending */
2529 if (efx->reset_pending) {
2530 netif_err(efx, probe, efx->net_dev,
2531 "aborting probe due to scheduled reset\n");
2532 rc = -EIO;
2533 goto fail_locked;
2534 }
2535
aed0628d
BH		 2536 rc = dev_alloc_name(net_dev, net_dev->name);
2537 if (rc < 0)
2538 goto fail_locked;
7dde596e 2539 efx_update_name(efx);
aed0628d 2540
8f8b3d51
BH		 2541 /* Always start with carrier off; PHY events will detect the link */
2542 netif_carrier_off(net_dev);
2543
aed0628d
BH		 2544 rc = register_netdevice(net_dev);
2545 if (rc)
2546 goto fail_locked;
2547
c04bfc6b
BH		 2548 efx_for_each_channel(channel, efx) {
2549 struct efx_tx_queue *tx_queue;
60031fcc
BH		 2550 efx_for_each_channel_tx_queue(tx_queue, channel)
2551 efx_init_tx_queue_core_txq(tx_queue);
c04bfc6b
BH		 2552 }
2553
0bcf4a64
BH		 2554 efx_associate(efx);
2555
7dde596e 2556 rtnl_unlock();
8ceee660 2557
06d5e193
BH		 2558 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
2559 if (rc) {
62776d03
BH		 2560 netif_err(efx, drv, efx->net_dev,
2561 "failed to init net dev attributes\n");
06d5e193
BH		 2562 goto fail_registered;
2563 }
e7fef9b4
EC		 2564#ifdef CONFIG_SFC_MCDI_LOGGING
2565 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_mcdi_logging);
2566 if (rc) {
2567 netif_err(efx, drv, efx->net_dev,
2568 "failed to init net dev attributes\n");
2569 goto fail_attr_mcdi_logging;
2570 }
2571#endif
06d5e193 2572
8ceee660 2573 return 0;
06d5e193 2574
e7fef9b4
EC		 2575#ifdef CONFIG_SFC_MCDI_LOGGING
2576fail_attr_mcdi_logging:
2577 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
2578#endif
7153f623
BH		 2579fail_registered:
2580 rtnl_lock();
0bcf4a64 2581 efx_dissociate(efx);
7153f623 2582 unregister_netdevice(net_dev);
aed0628d 2583fail_locked:
7153f623 2584 efx->state = STATE_UNINIT;
aed0628d 2585 rtnl_unlock();
62776d03 2586 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
aed0628d 2587 return rc;
8ceee660
BH		 2588}
2589
2590static void efx_unregister_netdev(struct efx_nic *efx)
2591{
8ceee660
BH		 2592 if (!efx->net_dev)
2593 return;
2594
767e468c 2595 BUG_ON(netdev_priv(efx->net_dev) != efx);
8ceee660 2596
e7fef9b4
EC		 2597 if (efx_dev_registered(efx)) {
2598 strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
2599#ifdef CONFIG_SFC_MCDI_LOGGING
2600 device_remove_file(&efx->pci_dev->dev, &dev_attr_mcdi_logging);
2601#endif
2602 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
2603 unregister_netdev(efx->net_dev);
2604 }
8ceee660
BH		 2605}
2606
2607/**************************************************************************
2608 *
2609 * Device reset and suspend
2610 *
2611 **************************************************************************/
2612
2467ca46
BH		 2613/* Tears down the entire software state and most of the hardware state
2614 * before reset. */
d3245b28 2615void efx_reset_down(struct efx_nic *efx, enum reset_type method)
8ceee660 2616{
8ceee660
BH		 2617 EFX_ASSERT_RESET_SERIALISED(efx);
2618
e283546c
EC		 2619 if (method == RESET_TYPE_MCDI_TIMEOUT)
2620 efx->type->prepare_flr(efx);
2621
2467ca46 2622 efx_stop_all(efx);
d8291187 2623 efx_disable_interrupts(efx);
5642ceef
BH		 2624
2625 mutex_lock(&efx->mac_lock);
087e9025
JC		 2626 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE &&
2627 method != RESET_TYPE_DATAPATH)
4b988280 2628 efx->phy_op->fini(efx);
ef2b90ee 2629 efx->type->fini(efx);
8ceee660
BH		 2630}
2631
2467ca46
BH		 2632/* This function will always ensure that the locks acquired in
2633 * efx_reset_down() are released. A failure return code indicates
2634 * that we were unable to reinitialise the hardware, and the
2635 * driver should be disabled. If ok is false, then the rx and tx
2636 * engines are not restarted, pending a RESET_DISABLE. */
d3245b28 2637int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
8ceee660
BH		 2638{
2639 int rc;
2640
2467ca46 2641 EFX_ASSERT_RESET_SERIALISED(efx);
8ceee660 2642
e283546c
EC		 2643 if (method == RESET_TYPE_MCDI_TIMEOUT)
2644 efx->type->finish_flr(efx);
2645
2646 /* Ensure that SRAM is initialised even if we're disabling the device */
ef2b90ee 2647 rc = efx->type->init(efx);
8ceee660 2648 if (rc) {
62776d03 2649 netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n");
eb9f6744 2650 goto fail;
8ceee660
BH		 2651 }
2652
eb9f6744
BH		 2653 if (!ok)
2654 goto fail;
2655
087e9025
JC		 2656 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE &&
2657 method != RESET_TYPE_DATAPATH) {
eb9f6744
BH		 2658 rc = efx->phy_op->init(efx);
2659 if (rc)
2660 goto fail;
267d9d73
EC		 2661 rc = efx->phy_op->reconfigure(efx);
2662 if (rc && rc != -EPERM)
62776d03
BH		 2663 netif_err(efx, drv, efx->net_dev,
2664 "could not restore PHY settings\n");
4b988280
SH		 2665 }
2666
261e4d96
JC		 2667 rc = efx_enable_interrupts(efx);
2668 if (rc)
2669 goto fail;
6d8aaaf6
DP		 2670
2671#ifdef CONFIG_SFC_SRIOV
2672 rc = efx->type->vswitching_restore(efx);
2673 if (rc) /* not fatal; the PF will still work fine */
2674 netif_warn(efx, probe, efx->net_dev,
2675 "failed to restore vswitching rc=%d;"
2676 " VFs may not function\n", rc);
2677#endif
2678
0d322413 2679 down_read(&efx->filter_sem);
64eebcfd 2680 efx_restore_filters(efx);
0d322413 2681 up_read(&efx->filter_sem);
7fa8d547
SS		 2682 if (efx->type->sriov_reset)
2683 efx->type->sriov_reset(efx);
eb9f6744 2684
eb9f6744
BH		 2685 mutex_unlock(&efx->mac_lock);
2686
2687 efx_start_all(efx);
2688
e5fbd977
JC		 2689 if (efx->type->udp_tnl_push_ports)
2690 efx->type->udp_tnl_push_ports(efx);
2691
eb9f6744
BH		 2692 return 0;
2693
2694fail:
2695 efx->port_initialized = false;
2467ca46
BH		 2696
2697 mutex_unlock(&efx->mac_lock);
2698
8ceee660
BH		 2699 return rc;
2700}
2701
eb9f6744
BH		 2702/* Reset the NIC using the specified method. Note that the reset may
2703 * fail, in which case the card will be left in an unusable state.
8ceee660 2704 *
eb9f6744 2705 * Caller must hold the rtnl_lock.
8ceee660 2706 */
eb9f6744 2707int efx_reset(struct efx_nic *efx, enum reset_type method)
8ceee660 2708{
eb9f6744
BH		 2709 int rc, rc2;
2710 bool disabled;
8ceee660 2711
62776d03
BH		 2712 netif_info(efx, drv, efx->net_dev, "resetting (%s)\n",
2713 RESET_TYPE(method));
8ceee660 2714
c2f3b8e3 2715 efx_device_detach_sync(efx);
d3245b28 2716 efx_reset_down(efx, method);
8ceee660 2717
ef2b90ee 2718 rc = efx->type->reset(efx, method);
8ceee660 2719 if (rc) {
62776d03 2720 netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n");
eb9f6744 2721 goto out;
8ceee660
BH		 2722 }
2723
a7d529ae
BH		 2724 /* Clear flags for the scopes we covered. We assume the NIC and
2725 * driver are now quiescent so that there is no race here.
2726 */
e283546c
EC		 2727 if (method < RESET_TYPE_MAX_METHOD)
2728 efx->reset_pending &= -(1 << (method + 1));
2729 else /* it doesn't fit into the well-ordered scope hierarchy */
2730 __clear_bit(method, &efx->reset_pending);
8ceee660
BH		 2731
2732 /* Reinitialise bus-mastering, which may have been turned off before
2733 * the reset was scheduled. This is still appropriate, even in the
2734 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
2735 * can respond to requests. */
2736 pci_set_master(efx->pci_dev);
2737
eb9f6744 2738out:
8ceee660 2739 /* Leave device stopped if necessary */
626950db
AR		 2740 disabled = rc ||
2741 method == RESET_TYPE_DISABLE ||
2742 method == RESET_TYPE_RECOVER_OR_DISABLE;
eb9f6744
BH		 2743 rc2 = efx_reset_up(efx, method, !disabled);
2744 if (rc2) {
2745 disabled = true;
2746 if (!rc)
2747 rc = rc2;
8ceee660
BH		 2748 }
2749
eb9f6744 2750 if (disabled) {
f49a4589 2751 dev_close(efx->net_dev);
62776d03 2752 netif_err(efx, drv, efx->net_dev, "has been disabled\n");
f4bd954e 2753 efx->state = STATE_DISABLED;
f4bd954e 2754 } else {
62776d03 2755 netif_dbg(efx, drv, efx->net_dev, "reset complete\n");
9c568fd8 2756 efx_device_attach_if_not_resetting(efx);
f4bd954e 2757 }
8ceee660
BH		 2758 return rc;
2759}
2760
626950db
AR		 2761/* Try recovery mechanisms.
2762 * For now only EEH is supported.
2763 * Returns 0 if the recovery mechanisms are unsuccessful.
2764 * Returns a non-zero value otherwise.
2765 */
b28405b0 2766int efx_try_recovery(struct efx_nic *efx)
626950db
AR		 2767{
2768#ifdef CONFIG_EEH
2769 /* A PCI error can occur and not be seen by EEH because nothing
2770 * happens on the PCI bus. In this case the driver may fail and
2771 * schedule a 'recover or reset', leading to this recovery handler.
2772 * Manually call the eeh failure check function.
2773 */
12a89dba 2774 struct eeh_dev *eehdev = pci_dev_to_eeh_dev(efx->pci_dev);
626950db
AR		 2775 if (eeh_dev_check_failure(eehdev)) {
2776 /* The EEH mechanisms will handle the error and reset the
2777 * device if necessary.
2778 */
2779 return 1;
2780 }
2781#endif
2782 return 0;
2783}
2784
74cd60a4
JC		 2785static void efx_wait_for_bist_end(struct efx_nic *efx)
2786{
2787 int i;
2788
2789 for (i = 0; i < BIST_WAIT_DELAY_COUNT; ++i) {
2790 if (efx_mcdi_poll_reboot(efx))
2791 goto out;
2792 msleep(BIST_WAIT_DELAY_MS);
2793 }
2794
2795 netif_err(efx, drv, efx->net_dev, "Warning: No MC reboot after BIST mode\n");
2796out:
2797 /* Either way unset the BIST flag. If we found no reboot we probably
2798 * won't recover, but we should try.
2799 */
2800 efx->mc_bist_for_other_fn = false;
2801}
2802
8ceee660
BH		 2803/* The worker thread exists so that code that cannot sleep can
2804 * schedule a reset for later.
2805 */
2806static void efx_reset_work(struct work_struct *data)
2807{
eb9f6744 2808 struct efx_nic *efx = container_of(data, struct efx_nic, reset_work);
626950db
AR		 2809 unsigned long pending;
2810 enum reset_type method;
2811
6aa7de05 2812 pending = READ_ONCE(efx->reset_pending);
626950db
AR		 2813 method = fls(pending) - 1;
2814
74cd60a4
JC		 2815 if (method == RESET_TYPE_MC_BIST)
2816 efx_wait_for_bist_end(efx);
2817
626950db
AR		 2818 if ((method == RESET_TYPE_RECOVER_OR_DISABLE ||
2819 method == RESET_TYPE_RECOVER_OR_ALL) &&
2820 efx_try_recovery(efx))
2821 return;
8ceee660 2822
a7d529ae 2823 if (!pending)
319ba649
SH		 2824 return;
2825
eb9f6744 2826 rtnl_lock();
7153f623
BH		 2827
2828 /* We checked the state in efx_schedule_reset() but it may
2829 * have changed by now. Now that we have the RTNL lock,
2830 * it cannot change again.
2831 */
2832 if (efx->state == STATE_READY)
626950db 2833 (void)efx_reset(efx, method);
7153f623 2834
eb9f6744 2835 rtnl_unlock();
8ceee660
BH		 2836}
2837
2838void efx_schedule_reset(struct efx_nic *efx, enum reset_type type)
2839{
2840 enum reset_type method;
2841
626950db
AR		 2842 if (efx->state == STATE_RECOVERY) {
2843 netif_dbg(efx, drv, efx->net_dev,
2844 "recovering: skip scheduling %s reset\n",
2845 RESET_TYPE(type));
2846 return;
2847 }
2848
8ceee660
BH		 2849 switch (type) {
2850 case RESET_TYPE_INVISIBLE:
2851 case RESET_TYPE_ALL:
626950db 2852 case RESET_TYPE_RECOVER_OR_ALL:
8ceee660
BH		 2853 case RESET_TYPE_WORLD:
2854 case RESET_TYPE_DISABLE:
626950db 2855 case RESET_TYPE_RECOVER_OR_DISABLE:
087e9025 2856 case RESET_TYPE_DATAPATH:
74cd60a4 2857 case RESET_TYPE_MC_BIST:
e283546c 2858 case RESET_TYPE_MCDI_TIMEOUT:
8ceee660 2859 method = type;
0e2a9c7c
BH		 2860 netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n",
2861 RESET_TYPE(method));
8ceee660 2862 break;
8ceee660 2863 default:
0e2a9c7c 2864 method = efx->type->map_reset_reason(type);
62776d03
BH		 2865 netif_dbg(efx, drv, efx->net_dev,
2866 "scheduling %s reset for %s\n",
2867 RESET_TYPE(method), RESET_TYPE(type));
0e2a9c7c
BH		 2868 break;
2869 }
8ceee660 2870
a7d529ae 2871 set_bit(method, &efx->reset_pending);
7153f623
BH		 2872 smp_mb(); /* ensure we change reset_pending before checking state */
2873
2874 /* If we're not READY then just leave the flags set as the cue
2875 * to abort probing or reschedule the reset later.
2876 */
6aa7de05 2877 if (READ_ONCE(efx->state) != STATE_READY)
7153f623 2878 return;
8ceee660 2879
8880f4ec
BH		 2880 /* efx_process_channel() will no longer read events once a
2881 * reset is scheduled. So switch back to poll'd MCDI completions. */
2882 efx_mcdi_mode_poll(efx);
2883
1ab00629 2884 queue_work(reset_workqueue, &efx->reset_work);
8ceee660
BH		 2885}
2886
2887/**************************************************************************
2888 *
2889 * List of NICs we support
2890 *
2891 **************************************************************************/
2892
2893/* PCI device ID table */
9baa3c34 2894static const struct pci_device_id efx_pci_table[] = {
547c474f 2895 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */
8880f4ec 2896 .driver_data = (unsigned long) &siena_a0_nic_type},
547c474f 2897 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */
8880f4ec 2898 .driver_data = (unsigned long) &siena_a0_nic_type},
8127d661
BH		 2899 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903), /* SFC9120 PF */
2900 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
6f7f8aa6
SS		 2901 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903), /* SFC9120 VF */
2902 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
3b06a00e
MW		 2903 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923), /* SFC9140 PF */
2904 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
dd248f1b
BK		 2905 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923), /* SFC9140 VF */
2906 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
2907 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03), /* SFC9220 PF */
2908 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
2909 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03), /* SFC9220 VF */
2910 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
8ceee660
BH		 2911 {0} /* end of list */
2912};
2913
2914/**************************************************************************
2915 *
3759433d 2916 * Dummy PHY/MAC operations
8ceee660 2917 *
01aad7b6 2918 * Can be used for some unimplemented operations
8ceee660
BH		 2919 * Needed so all function pointers are valid and do not have to be tested
2920 * before use
2921 *
2922 **************************************************************************/
2923int efx_port_dummy_op_int(struct efx_nic *efx)
2924{
2925 return 0;
2926}
2927void efx_port_dummy_op_void(struct efx_nic *efx) {}
d215697f 2928
2929static bool efx_port_dummy_op_poll(struct efx_nic *efx)
fdaa9aed
SH		 2930{
2931 return false;
2932}
8ceee660 2933
6c8c2513 2934static const struct efx_phy_operations efx_dummy_phy_operations = {
8ceee660 2935 .init = efx_port_dummy_op_int,
d3245b28 2936 .reconfigure = efx_port_dummy_op_int,
fdaa9aed 2937 .poll = efx_port_dummy_op_poll,
8ceee660 2938 .fini = efx_port_dummy_op_void,
8ceee660
BH		 2939};
2940
8ceee660
BH		 2941/**************************************************************************
2942 *
2943 * Data housekeeping
2944 *
2945 **************************************************************************/
2946
2947/* This zeroes out and then fills in the invariants in a struct
2948 * efx_nic (including all sub-structures).
2949 */
adeb15aa 2950static int efx_init_struct(struct efx_nic *efx,
8ceee660
BH		 2951 struct pci_dev *pci_dev, struct net_device *net_dev)
2952{
6f9f6ec2 2953 int rc = -ENOMEM, i;
8ceee660
BH		 2954
2955 /* Initialise common structures */
0bcf4a64
BH		 2956 INIT_LIST_HEAD(&efx->node);
2957 INIT_LIST_HEAD(&efx->secondary_list);
8ceee660 2958 spin_lock_init(&efx->biu_lock);
76884835
BH		 2959#ifdef CONFIG_SFC_MTD
2960 INIT_LIST_HEAD(&efx->mtd_list);
2961#endif
8ceee660
BH		 2962 INIT_WORK(&efx->reset_work, efx_reset_work);
2963 INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor);
dd40781e 2964 INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work);
8ceee660 2965 efx->pci_dev = pci_dev;
62776d03 2966 efx->msg_enable = debug;
f16aeea0 2967 efx->state = STATE_UNINIT;
8ceee660 2968 strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name));
8ceee660
BH		 2969
2970 efx->net_dev = net_dev;
43a3739d 2971 efx->rx_prefix_size = efx->type->rx_prefix_size;
2ec03014
AR		 2972 efx->rx_ip_align =
2973 NET_IP_ALIGN ? (efx->rx_prefix_size + NET_IP_ALIGN) % 4 : 0;
43a3739d
JC		 2974 efx->rx_packet_hash_offset =
2975 efx->type->rx_hash_offset - efx->type->rx_prefix_size;
bd9a265d
JC		 2976 efx->rx_packet_ts_offset =
2977 efx->type->rx_ts_offset - efx->type->rx_prefix_size;
8ceee660
BH		 2978 spin_lock_init(&efx->stats_lock);
2979 mutex_init(&efx->mac_lock);
2980 efx->phy_op = &efx_dummy_phy_operations;
68e7f45e 2981 efx->mdio.dev = net_dev;
766ca0fa 2982 INIT_WORK(&efx->mac_work, efx_mac_work);
9f2cb71c 2983 init_waitqueue_head(&efx->flush_wq);
8ceee660
BH		 2984
2985 for (i = 0; i < EFX_MAX_CHANNELS; i++) {
4642610c
BH		 2986 efx->channel[i] = efx_alloc_channel(efx, i, NULL);
2987 if (!efx->channel[i])
2988 goto fail;
d8291187
BH		 2989 efx->msi_context[i].efx = efx;
2990 efx->msi_context[i].index = i;
8ceee660
BH		 2991 }
2992
8ceee660 2993 /* Higher numbered interrupt modes are less capable! */
6f9f6ec2
AR		 2994 if (WARN_ON_ONCE(efx->type->max_interrupt_mode >
2995 efx->type->min_interrupt_mode)) {
2996 rc = -EIO;
2997 goto fail;
2998 }
8ceee660
BH		 2999 efx->interrupt_mode = max(efx->type->max_interrupt_mode,
3000 interrupt_mode);
6f9f6ec2
AR		 3001 efx->interrupt_mode = min(efx->type->min_interrupt_mode,
3002 interrupt_mode);
8ceee660 3003
6977dc63
BH		 3004 /* Would be good to use the net_dev name, but we're too early */
3005 snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s",
3006 pci_name(pci_dev));
3007 efx->workqueue = create_singlethread_workqueue(efx->workqueue_name);
1ab00629 3008 if (!efx->workqueue)
4642610c 3009 goto fail;
8d9853d9 3010
8ceee660 3011 return 0;
4642610c
BH		 3012
3013fail:
3014 efx_fini_struct(efx);
6f9f6ec2 3015 return rc;
8ceee660
BH		 3016}
3017
3018static void efx_fini_struct(struct efx_nic *efx)
3019{
8313aca3
BH		 3020 int i;
3021
3022 for (i = 0; i < EFX_MAX_CHANNELS; i++)
3023 kfree(efx->channel[i]);
3024
ef215e64
BH		 3025 kfree(efx->vpd_sn);
3026
8ceee660
BH		 3027 if (efx->workqueue) {
3028 destroy_workqueue(efx->workqueue);
3029 efx->workqueue = NULL;
3030 }
3031}
3032
e4d112e4
EC		 3033void efx_update_sw_stats(struct efx_nic *efx, u64 *stats)
3034{
3035 u64 n_rx_nodesc_trunc = 0;
3036 struct efx_channel *channel;
3037
3038 efx_for_each_channel(channel, efx)
3039 n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;
3040 stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;
3041 stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);
3042}
3043
8ceee660
BH		 3044/**************************************************************************
3045 *
3046 * PCI interface
3047 *
3048 **************************************************************************/
3049
3050/* Main body of final NIC shutdown code
3051 * This is called only at module unload (or hotplug removal).
3052 */
3053static void efx_pci_remove_main(struct efx_nic *efx)
3054{
7153f623
BH		 3055 /* Flush reset_work. It can no longer be scheduled since we
3056 * are not READY.
3057 */
3058 BUG_ON(efx->state == STATE_READY);
3059 cancel_work_sync(&efx->reset_work);
3060
d8291187 3061 efx_disable_interrupts(efx);
152b6a62 3062 efx_nic_fini_interrupt(efx);
8ceee660 3063 efx_fini_port(efx);
ef2b90ee 3064 efx->type->fini(efx);
8ceee660
BH		 3065 efx_fini_napi(efx);
3066 efx_remove_all(efx);
3067}
3068
3069/* Final NIC shutdown
2a3fc311
DP		 3070 * This is called only at module unload (or hotplug removal). A PF can call
3071 * this on its VFs to ensure they are unbound first.
8ceee660
BH		 3072 */
3073static void efx_pci_remove(struct pci_dev *pci_dev)
3074{
3075 struct efx_nic *efx;
3076
3077 efx = pci_get_drvdata(pci_dev);
3078 if (!efx)
3079 return;
3080
3081 /* Mark the NIC as fini, then stop the interface */
3082 rtnl_lock();
0bcf4a64 3083 efx_dissociate(efx);
8ceee660 3084 dev_close(efx->net_dev);
d8291187 3085 efx_disable_interrupts(efx);
ea6bb99e 3086 efx->state = STATE_UNINIT;
8ceee660
BH		 3087 rtnl_unlock();
3088
7fa8d547
SS		 3089 if (efx->type->sriov_fini)
3090 efx->type->sriov_fini(efx);
3091
8ceee660
BH		 3092 efx_unregister_netdev(efx);
3093
7dde596e
BH		 3094 efx_mtd_remove(efx);
3095
8ceee660
BH		 3096 efx_pci_remove_main(efx);
3097
8ceee660 3098 efx_fini_io(efx);
62776d03 3099 netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
8ceee660 3100
8ceee660
BH		 3101 efx_fini_struct(efx);
3102 free_netdev(efx->net_dev);
626950db
AR		 3103
3104 pci_disable_pcie_error_reporting(pci_dev);
8ceee660
BH		 3105};
3106
460eeaa0
BH		 3107/* NIC VPD information
3108 * Called during probe to display the part number of the
3109 * installed NIC. VPD is potentially very large but this should
3110 * always appear within the first 512 bytes.
3111 */
3112#define SFC_VPD_LEN 512
ef215e64 3113static void efx_probe_vpd_strings(struct efx_nic *efx)
460eeaa0
BH		 3114{
3115 struct pci_dev *dev = efx->pci_dev;
3116 char vpd_data[SFC_VPD_LEN];
3117 ssize_t vpd_size;
ef215e64 3118 int ro_start, ro_size, i, j;
460eeaa0
BH		 3119
3120 /* Get the vpd data from the device */
3121 vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data);
3122 if (vpd_size <= 0) {
3123 netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n");
3124 return;
3125 }
3126
3127 /* Get the Read only section */
ef215e64
BH		 3128 ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA);
3129 if (ro_start < 0) {
460eeaa0
BH		 3130 netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n");
3131 return;
3132 }
3133
ef215e64
BH		 3134 ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]);
3135 j = ro_size;
3136 i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
460eeaa0
BH		 3137 if (i + j > vpd_size)
3138 j = vpd_size - i;
3139
3140 /* Get the Part number */
3141 i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN");
3142 if (i < 0) {
3143 netif_err(efx, drv, efx->net_dev, "Part number not found\n");
3144 return;
3145 }
3146
3147 j = pci_vpd_info_field_size(&vpd_data[i]);
3148 i += PCI_VPD_INFO_FLD_HDR_SIZE;
3149 if (i + j > vpd_size) {
3150 netif_err(efx, drv, efx->net_dev, "Incomplete part number\n");
3151 return;
3152 }
3153
3154 netif_info(efx, drv, efx->net_dev,
3155 "Part Number : %.*s\n", j, &vpd_data[i]);
ef215e64
BH		 3156
3157 i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
3158 j = ro_size;
3159 i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN");
3160 if (i < 0) {
3161 netif_err(efx, drv, efx->net_dev, "Serial number not found\n");
3162 return;
3163 }
3164
3165 j = pci_vpd_info_field_size(&vpd_data[i]);
3166 i += PCI_VPD_INFO_FLD_HDR_SIZE;
3167 if (i + j > vpd_size) {
3168 netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n");
3169 return;
3170 }
3171
3172 efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL);
3173 if (!efx->vpd_sn)
3174 return;
3175
3176 snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]);
460eeaa0
BH		 3177}
3178
3179
8ceee660
BH		 3180/* Main body of NIC initialisation
3181 * This is called at module load (or hotplug insertion, theoretically).
3182 */
3183static int efx_pci_probe_main(struct efx_nic *efx)
3184{
3185 int rc;
3186
3187 /* Do start-of-day initialisation */
3188 rc = efx_probe_all(efx);
3189 if (rc)
3190 goto fail1;
3191
e8f14992 3192 efx_init_napi(efx);
8ceee660 3193
ef2b90ee 3194 rc = efx->type->init(efx);
8ceee660 3195 if (rc) {
62776d03
BH		 3196 netif_err(efx, probe, efx->net_dev,
3197 "failed to initialise NIC\n");
278c0621 3198 goto fail3;
8ceee660
BH		 3199 }
3200
3201 rc = efx_init_port(efx);
3202 if (rc) {
62776d03
BH		 3203 netif_err(efx, probe, efx->net_dev,
3204 "failed to initialise port\n");
278c0621 3205 goto fail4;
8ceee660
BH		 3206 }
3207
152b6a62 3208 rc = efx_nic_init_interrupt(efx);
8ceee660 3209 if (rc)
278c0621 3210 goto fail5;
261e4d96
JC		 3211 rc = efx_enable_interrupts(efx);
3212 if (rc)
3213 goto fail6;
8ceee660
BH		 3214
3215 return 0;
3216
261e4d96
JC		 3217 fail6:
3218 efx_nic_fini_interrupt(efx);
278c0621 3219 fail5:
8ceee660 3220 efx_fini_port(efx);
8ceee660 3221 fail4:
ef2b90ee 3222 efx->type->fini(efx);
8ceee660
BH		 3223 fail3:
3224 efx_fini_napi(efx);
8ceee660
BH		 3225 efx_remove_all(efx);
3226 fail1:
3227 return rc;
3228}
3229
8a531400
JC		 3230static int efx_pci_probe_post_io(struct efx_nic *efx)
3231{
3232 struct net_device *net_dev = efx->net_dev;
3233 int rc = efx_pci_probe_main(efx);
3234
3235 if (rc)
3236 return rc;
3237
3238 if (efx->type->sriov_init) {
3239 rc = efx->type->sriov_init(efx);
3240 if (rc)
3241 netif_err(efx, probe, efx->net_dev,
3242 "SR-IOV can't be enabled rc %d\n", rc);
3243 }
3244
3245 /* Determine netdevice features */
3246 net_dev->features |= (efx->type->offload_features | NETIF_F_SG |
3247 NETIF_F_TSO | NETIF_F_RXCSUM);
3248 if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM))
3249 net_dev->features |= NETIF_F_TSO6;
3250 /* Check whether device supports TSO */
3251 if (!efx->type->tso_versions || !efx->type->tso_versions(efx))
3252 net_dev->features &= ~NETIF_F_ALL_TSO;
3253 /* Mask for features that also apply to VLAN devices */
3254 net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG |
3255 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |
3256 NETIF_F_RXCSUM);
3257
3258 net_dev->hw_features = net_dev->features & ~efx->fixed_features;
3259
3260 /* Disable VLAN filtering by default. It may be enforced if
3261 * the feature is fixed (i.e. VLAN filters are required to
3262 * receive VLAN tagged packets due to vPort restrictions).
3263 */
3264 net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
3265 net_dev->features |= efx->fixed_features;
3266
3267 rc = efx_register_netdev(efx);
3268 if (!rc)
3269 return 0;
3270
3271 efx_pci_remove_main(efx);
3272 return rc;
3273}
3274
8ceee660
BH		 3275/* NIC initialisation
3276 *
3277 * This is called at module load (or hotplug insertion,
73ba7b68 3278 * theoretically). It sets up PCI mappings, resets the NIC,
8ceee660
BH		 3279 * sets up and registers the network devices with the kernel and hooks
3280 * the interrupt service routine. It does not prepare the device for
3281 * transmission; this is left to the first time one of the network
3282 * interfaces is brought up (i.e. efx_net_open).
3283 */
87d1fc11 3284static int efx_pci_probe(struct pci_dev *pci_dev,
1dd06ae8 3285 const struct pci_device_id *entry)
8ceee660 3286{
8ceee660
BH		 3287 struct net_device *net_dev;
3288 struct efx_nic *efx;
fadac6aa 3289 int rc;
8ceee660
BH		 3290
3291 /* Allocate and initialise a struct net_device and struct efx_nic */
94b274bf
BH		 3292 net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES,
3293 EFX_MAX_RX_QUEUES);
8ceee660
BH		 3294 if (!net_dev)
3295 return -ENOMEM;
adeb15aa
BH		 3296 efx = netdev_priv(net_dev);
3297 efx->type = (const struct efx_nic_type *) entry->driver_data;
ebfcd0fd 3298 efx->fixed_features |= NETIF_F_HIGHDMA;
eb7cfd8c 3299
8ceee660 3300 pci_set_drvdata(pci_dev, efx);
62776d03 3301 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
adeb15aa 3302 rc = efx_init_struct(efx, pci_dev, net_dev);
8ceee660
BH		 3303 if (rc)
3304 goto fail1;
3305
62776d03 3306 netif_info(efx, probe, efx->net_dev,
ff79c8ac 3307 "Solarflare NIC detected\n");
8ceee660 3308
6f7f8aa6
SS		 3309 if (!efx->type->is_vf)
3310 efx_probe_vpd_strings(efx);
460eeaa0 3311
8ceee660
BH		 3312 /* Set up basic I/O (BAR mappings etc) */
3313 rc = efx_init_io(efx);
3314 if (rc)
3315 goto fail2;
3316
8a531400
JC		 3317 rc = efx_pci_probe_post_io(efx);
3318 if (rc) {
3319 /* On failure, retry once immediately.
3320 * If we aborted probe due to a scheduled reset, dismiss it.
3321 */
3322 efx->reset_pending = 0;
3323 rc = efx_pci_probe_post_io(efx);
3324 if (rc) {
3325 /* On another failure, retry once more
3326 * after a 50-305ms delay.
3327 */
3328 unsigned char r;
3329
3330 get_random_bytes(&r, 1);
3331 msleep((unsigned int)r + 50);
3332 efx->reset_pending = 0;
3333 rc = efx_pci_probe_post_io(efx);
3334 }
3335 }
fadac6aa
BH		 3336 if (rc)
3337 goto fail3;
8ceee660 3338
62776d03 3339 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
a5211bb5 3340
7c43161c 3341 /* Try to create MTDs, but allow this to fail */
a5211bb5 3342 rtnl_lock();
7c43161c 3343 rc = efx_mtd_probe(efx);
a5211bb5 3344 rtnl_unlock();
09a04204 3345 if (rc && rc != -EPERM)
7c43161c
BH		 3346 netif_warn(efx, probe, efx->net_dev,
3347 "failed to create MTDs (%d)\n", rc);
3348
626950db
AR		 3349 rc = pci_enable_pcie_error_reporting(pci_dev);
3350 if (rc && rc != -EINVAL)
09a04204
BK		 3351 netif_notice(efx, probe, efx->net_dev,
3352 "PCIE error reporting unavailable (%d).\n",
3353 rc);
626950db 3354
e5fbd977
JC		 3355 if (efx->type->udp_tnl_push_ports)
3356 efx->type->udp_tnl_push_ports(efx);
3357
8ceee660
BH		 3358 return 0;
3359
8ceee660
BH		 3360 fail3:
3361 efx_fini_io(efx);
3362 fail2:
3363 efx_fini_struct(efx);
3364 fail1:
5e2a911c 3365 WARN_ON(rc > 0);
62776d03 3366 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
8ceee660
BH		 3367 free_netdev(net_dev);
3368 return rc;
3369}
3370
834e23dd
SS		 3371/* efx_pci_sriov_configure returns the actual number of Virtual Functions
3372 * enabled on success
3373 */
3374#ifdef CONFIG_SFC_SRIOV
3375static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs)
3376{
3377 int rc;
3378 struct efx_nic *efx = pci_get_drvdata(dev);
3379
3380 if (efx->type->sriov_configure) {
3381 rc = efx->type->sriov_configure(efx, num_vfs);
3382 if (rc)
3383 return rc;
3384 else
3385 return num_vfs;
3386 } else
3387 return -EOPNOTSUPP;
3388}
3389#endif
3390
89c758fa
BH		 3391static int efx_pm_freeze(struct device *dev)
3392{
3393 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
3394
61da026d
BH		 3395 rtnl_lock();
3396
6032fb56
BH		 3397 if (efx->state != STATE_DISABLED) {
3398 efx->state = STATE_UNINIT;
89c758fa 3399
c2f3b8e3 3400 efx_device_detach_sync(efx);
89c758fa 3401
6032fb56 3402 efx_stop_all(efx);
d8291187 3403 efx_disable_interrupts(efx);
6032fb56 3404 }
89c758fa 3405
61da026d
BH		 3406 rtnl_unlock();
3407
89c758fa
BH		 3408 return 0;
3409}
3410
3411static int efx_pm_thaw(struct device *dev)
3412{
261e4d96 3413 int rc;
89c758fa
BH		 3414 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
3415
61da026d
BH		 3416 rtnl_lock();
3417
6032fb56 3418 if (efx->state != STATE_DISABLED) {
261e4d96
JC		 3419 rc = efx_enable_interrupts(efx);
3420 if (rc)
3421 goto fail;
89c758fa 3422
6032fb56
BH		 3423 mutex_lock(&efx->mac_lock);
3424 efx->phy_op->reconfigure(efx);
3425 mutex_unlock(&efx->mac_lock);
89c758fa 3426
6032fb56 3427 efx_start_all(efx);
89c758fa 3428
9c568fd8 3429 efx_device_attach_if_not_resetting(efx);
89c758fa 3430
6032fb56 3431 efx->state = STATE_READY;
89c758fa 3432
6032fb56
BH		 3433 efx->type->resume_wol(efx);
3434 }
89c758fa 3435
61da026d
BH		 3436 rtnl_unlock();
3437
319ba649
SH		 3438 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
3439 queue_work(reset_workqueue, &efx->reset_work);
3440
89c758fa 3441 return 0;
261e4d96
JC		 3442
3443fail:
3444 rtnl_unlock();
3445
3446 return rc;
89c758fa
BH		 3447}
3448
3449static int efx_pm_poweroff(struct device *dev)
3450{
3451 struct pci_dev *pci_dev = to_pci_dev(dev);
3452 struct efx_nic *efx = pci_get_drvdata(pci_dev);
3453
3454 efx->type->fini(efx);
3455
a7d529ae 3456 efx->reset_pending = 0;
89c758fa
BH		 3457
3458 pci_save_state(pci_dev);
3459 return pci_set_power_state(pci_dev, PCI_D3hot);
3460}
3461
3462/* Used for both resume and restore */
3463static int efx_pm_resume(struct device *dev)
3464{
3465 struct pci_dev *pci_dev = to_pci_dev(dev);
3466 struct efx_nic *efx = pci_get_drvdata(pci_dev);
3467 int rc;
3468
3469 rc = pci_set_power_state(pci_dev, PCI_D0);
3470 if (rc)
3471 return rc;
3472 pci_restore_state(pci_dev);
3473 rc = pci_enable_device(pci_dev);
3474 if (rc)
3475 return rc;
3476 pci_set_master(efx->pci_dev);
3477 rc = efx->type->reset(efx, RESET_TYPE_ALL);
3478 if (rc)
3479 return rc;
3480 rc = efx->type->init(efx);
3481 if (rc)
3482 return rc;
261e4d96
JC		 3483 rc = efx_pm_thaw(dev);
3484 return rc;
89c758fa
BH		 3485}
3486
3487static int efx_pm_suspend(struct device *dev)
3488{
3489 int rc;
3490
3491 efx_pm_freeze(dev);
3492 rc = efx_pm_poweroff(dev);
3493 if (rc)
3494 efx_pm_resume(dev);
3495 return rc;
3496}
3497
18e83e4c 3498static const struct dev_pm_ops efx_pm_ops = {
89c758fa
BH		 3499 .suspend = efx_pm_suspend,
3500 .resume = efx_pm_resume,
3501 .freeze = efx_pm_freeze,
3502 .thaw = efx_pm_thaw,
3503 .poweroff = efx_pm_poweroff,
3504 .restore = efx_pm_resume,
3505};
3506
626950db
AR		 3507/* A PCI error affecting this device was detected.
3508 * At this point MMIO and DMA may be disabled.
3509 * Stop the software path and request a slot reset.
3510 */
debd0034 3511static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev,
3512 enum pci_channel_state state)
626950db
AR		 3513{
3514 pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
3515 struct efx_nic *efx = pci_get_drvdata(pdev);
3516
3517 if (state == pci_channel_io_perm_failure)
3518 return PCI_ERS_RESULT_DISCONNECT;
3519
3520 rtnl_lock();
3521
3522 if (efx->state != STATE_DISABLED) {
3523 efx->state = STATE_RECOVERY;
3524 efx->reset_pending = 0;
3525
3526 efx_device_detach_sync(efx);
3527
3528 efx_stop_all(efx);
d8291187 3529 efx_disable_interrupts(efx);
626950db
AR		 3530
3531 status = PCI_ERS_RESULT_NEED_RESET;
3532 } else {
3533 /* If the interface is disabled we don't want to do anything
3534 * with it.
3535 */
3536 status = PCI_ERS_RESULT_RECOVERED;
3537 }
3538
3539 rtnl_unlock();
3540
3541 pci_disable_device(pdev);
3542
3543 return status;
3544}
3545
dbedd44e 3546/* Fake a successful reset, which will be performed later in efx_io_resume. */
debd0034 3547static pci_ers_result_t efx_io_slot_reset(struct pci_dev *pdev)
626950db
AR		 3548{
3549 struct efx_nic *efx = pci_get_drvdata(pdev);
3550 pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
3551 int rc;
3552
3553 if (pci_enable_device(pdev)) {
3554 netif_err(efx, hw, efx->net_dev,
3555 "Cannot re-enable PCI device after reset.\n");
3556 status = PCI_ERS_RESULT_DISCONNECT;
3557 }
3558
3559 rc = pci_cleanup_aer_uncorrect_error_status(pdev);
3560 if (rc) {
3561 netif_err(efx, hw, efx->net_dev,
3562 "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc);
3563 /* Non-fatal error. Continue. */
3564 }
3565
3566 return status;
3567}
3568
3569/* Perform the actual reset and resume I/O operations. */
3570static void efx_io_resume(struct pci_dev *pdev)
3571{
3572 struct efx_nic *efx = pci_get_drvdata(pdev);
3573 int rc;
3574
3575 rtnl_lock();
3576
3577 if (efx->state == STATE_DISABLED)
3578 goto out;
3579
3580 rc = efx_reset(efx, RESET_TYPE_ALL);
3581 if (rc) {
3582 netif_err(efx, hw, efx->net_dev,
3583 "efx_reset failed after PCI error (%d)\n", rc);
3584 } else {
3585 efx->state = STATE_READY;
3586 netif_dbg(efx, hw, efx->net_dev,
3587 "Done resetting and resuming IO after PCI error.\n");
3588 }
3589
3590out:
3591 rtnl_unlock();
3592}
3593
3594/* For simplicity and reliability, we always require a slot reset and try to
3595 * reset the hardware when a pci error affecting the device is detected.
3596 * We leave both the link_reset and mmio_enabled callback unimplemented:
3597 * with our request for slot reset the mmio_enabled callback will never be
3598 * called, and the link_reset callback is not used by AER or EEH mechanisms.
3599 */
c300366b 3600static const struct pci_error_handlers efx_err_handlers = {
626950db
AR		 3601 .error_detected = efx_io_error_detected,
3602 .slot_reset = efx_io_slot_reset,
3603 .resume = efx_io_resume,
3604};
3605
8ceee660 3606static struct pci_driver efx_pci_driver = {
c5d5f5fd 3607 .name = KBUILD_MODNAME,
8ceee660
BH		 3608 .id_table = efx_pci_table,
3609 .probe = efx_pci_probe,
3610 .remove = efx_pci_remove,
89c758fa 3611 .driver.pm = &efx_pm_ops,
626950db 3612 .err_handler = &efx_err_handlers,
834e23dd
SS		 3613#ifdef CONFIG_SFC_SRIOV
3614 .sriov_configure = efx_pci_sriov_configure,
3615#endif
8ceee660
BH		 3616};
3617
3618/**************************************************************************
3619 *
3620 * Kernel module interface
3621 *
3622 *************************************************************************/
3623
3624module_param(interrupt_mode, uint, 0444);
3625MODULE_PARM_DESC(interrupt_mode,
3626 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
3627
3628static int __init efx_init_module(void)
3629{
3630 int rc;
3631
3632 printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n");
3633
3634 rc = register_netdevice_notifier(&efx_netdev_notifier);
3635 if (rc)
3636 goto err_notifier;
3637
7fa8d547 3638#ifdef CONFIG_SFC_SRIOV
cd2d5b52
BH		 3639 rc = efx_init_sriov();
3640 if (rc)
3641 goto err_sriov;
7fa8d547 3642#endif
cd2d5b52 3643
1ab00629
SH		 3644 reset_workqueue = create_singlethread_workqueue("sfc_reset");
3645 if (!reset_workqueue) {
3646 rc = -ENOMEM;
3647 goto err_reset;
3648 }
8ceee660
BH		 3649
3650 rc = pci_register_driver(&efx_pci_driver);
3651 if (rc < 0)
3652 goto err_pci;
3653
3654 return 0;
3655
3656 err_pci:
1ab00629
SH		 3657 destroy_workqueue(reset_workqueue);
3658 err_reset:
7fa8d547 3659#ifdef CONFIG_SFC_SRIOV
cd2d5b52
BH		 3660 efx_fini_sriov();
3661 err_sriov:
7fa8d547 3662#endif
8ceee660
BH		 3663 unregister_netdevice_notifier(&efx_netdev_notifier);
3664 err_notifier:
3665 return rc;
3666}
3667
3668static void __exit efx_exit_module(void)
3669{
3670 printk(KERN_INFO "Solarflare NET driver unloading\n");
3671
3672 pci_unregister_driver(&efx_pci_driver);
1ab00629 3673 destroy_workqueue(reset_workqueue);
7fa8d547 3674#ifdef CONFIG_SFC_SRIOV
cd2d5b52 3675 efx_fini_sriov();
7fa8d547 3676#endif
8ceee660
BH		 3677 unregister_netdevice_notifier(&efx_netdev_notifier);
3678
3679}
3680
3681module_init(efx_init_module);
3682module_exit(efx_exit_module);
3683
906bb26c
BH		 3684MODULE_AUTHOR("Solarflare Communications and "
3685 "Michael Brown <mbrown@fensystems.co.uk>");
6a350fdb 3686MODULE_DESCRIPTION("Solarflare network driver");
8ceee660
BH		 3687MODULE_LICENSE("GPL");
3688MODULE_DEVICE_TABLE(pci, efx_pci_table);
14077e9e 3689MODULE_VERSION(EFX_DRIVER_VERSION);
Ubuntu Focal Linux kernel mirror