1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2005-2011 Solarflare Communications Inc.
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.
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>
18 #include <linux/tcp.h>
20 #include <linux/crc32.h>
21 #include <linux/ethtool.h>
22 #include <linux/topology.h>
23 #include <linux/gfp.h>
24 #include <linux/cpu_rmap.h>
25 #include "net_driver.h"
31 #include "workarounds.h"
33 /**************************************************************************
37 **************************************************************************
40 /* Loopback mode names (see LOOPBACK_MODE()) */
41 const unsigned int efx_loopback_mode_max = LOOPBACK_MAX;
42 const char *const efx_loopback_mode_names[] = {
43 [LOOPBACK_NONE] = "NONE",
44 [LOOPBACK_DATA] = "DATAPATH",
45 [LOOPBACK_GMAC] = "GMAC",
46 [LOOPBACK_XGMII] = "XGMII",
47 [LOOPBACK_XGXS] = "XGXS",
48 [LOOPBACK_XAUI] = "XAUI",
49 [LOOPBACK_GMII] = "GMII",
50 [LOOPBACK_SGMII] = "SGMII",
51 [LOOPBACK_XGBR] = "XGBR",
52 [LOOPBACK_XFI] = "XFI",
53 [LOOPBACK_XAUI_FAR] = "XAUI_FAR",
54 [LOOPBACK_GMII_FAR] = "GMII_FAR",
55 [LOOPBACK_SGMII_FAR] = "SGMII_FAR",
56 [LOOPBACK_XFI_FAR] = "XFI_FAR",
57 [LOOPBACK_GPHY] = "GPHY",
58 [LOOPBACK_PHYXS] = "PHYXS",
59 [LOOPBACK_PCS] = "PCS",
60 [LOOPBACK_PMAPMD] = "PMA/PMD",
61 [LOOPBACK_XPORT] = "XPORT",
62 [LOOPBACK_XGMII_WS] = "XGMII_WS",
63 [LOOPBACK_XAUI_WS] = "XAUI_WS",
64 [LOOPBACK_XAUI_WS_FAR] = "XAUI_WS_FAR",
65 [LOOPBACK_XAUI_WS_NEAR] = "XAUI_WS_NEAR",
66 [LOOPBACK_GMII_WS] = "GMII_WS",
67 [LOOPBACK_XFI_WS] = "XFI_WS",
68 [LOOPBACK_XFI_WS_FAR] = "XFI_WS_FAR",
69 [LOOPBACK_PHYXS_WS] = "PHYXS_WS",
72 const unsigned int efx_reset_type_max = RESET_TYPE_MAX;
73 const char *const efx_reset_type_names[] = {
74 [RESET_TYPE_INVISIBLE] = "INVISIBLE",
75 [RESET_TYPE_ALL] = "ALL",
76 [RESET_TYPE_WORLD] = "WORLD",
77 [RESET_TYPE_DISABLE] = "DISABLE",
78 [RESET_TYPE_TX_WATCHDOG] = "TX_WATCHDOG",
79 [RESET_TYPE_INT_ERROR] = "INT_ERROR",
80 [RESET_TYPE_RX_RECOVERY] = "RX_RECOVERY",
81 [RESET_TYPE_RX_DESC_FETCH] = "RX_DESC_FETCH",
82 [RESET_TYPE_TX_DESC_FETCH] = "TX_DESC_FETCH",
83 [RESET_TYPE_TX_SKIP] = "TX_SKIP",
84 [RESET_TYPE_MC_FAILURE] = "MC_FAILURE",
87 #define EFX_MAX_MTU (9 * 1024)
89 /* Reset workqueue. If any NIC has a hardware failure then a reset will be
90 * queued onto this work queue. This is not a per-nic work queue, because
91 * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised.
93 static struct workqueue_struct *reset_workqueue;
95 /**************************************************************************
99 *************************************************************************/
102 * Use separate channels for TX and RX events
104 * Set this to 1 to use separate channels for TX and RX. It allows us
105 * to control interrupt affinity separately for TX and RX.
107 * This is only used in MSI-X interrupt mode
109 static bool separate_tx_channels;
110 module_param(separate_tx_channels, bool, 0444);
111 MODULE_PARM_DESC(separate_tx_channels,
112 "Use separate channels for TX and RX");
114 /* This is the weight assigned to each of the (per-channel) virtual
117 static int napi_weight = 64;
119 /* This is the time (in jiffies) between invocations of the hardware
120 * monitor. On Falcon-based NICs, this will:
121 * - Check the on-board hardware monitor;
122 * - Poll the link state and reconfigure the hardware as necessary.
124 static unsigned int efx_monitor_interval = 1 * HZ;
126 /* Initial interrupt moderation settings. They can be modified after
127 * module load with ethtool.
129 * The default for RX should strike a balance between increasing the
130 * round-trip latency and reducing overhead.
132 static unsigned int rx_irq_mod_usec = 60;
134 /* Initial interrupt moderation settings. They can be modified after
135 * module load with ethtool.
137 * This default is chosen to ensure that a 10G link does not go idle
138 * while a TX queue is stopped after it has become full. A queue is
139 * restarted when it drops below half full. The time this takes (assuming
140 * worst case 3 descriptors per packet and 1024 descriptors) is
141 * 512 / 3 * 1.2 = 205 usec.
143 static unsigned int tx_irq_mod_usec = 150;
145 /* This is the first interrupt mode to try out of:
150 static unsigned int interrupt_mode;
152 /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS),
153 * i.e. the number of CPUs among which we may distribute simultaneous
154 * interrupt handling.
156 * Cards without MSI-X will only target one CPU via legacy or MSI interrupt.
157 * The default (0) means to assign an interrupt to each core.
159 static unsigned int rss_cpus;
160 module_param(rss_cpus, uint, 0444);
161 MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling");
163 static bool phy_flash_cfg;
164 module_param(phy_flash_cfg, bool, 0644);
165 MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially");
167 static unsigned irq_adapt_low_thresh = 8000;
168 module_param(irq_adapt_low_thresh, uint, 0644);
169 MODULE_PARM_DESC(irq_adapt_low_thresh,
170 "Threshold score for reducing IRQ moderation");
172 static unsigned irq_adapt_high_thresh = 16000;
173 module_param(irq_adapt_high_thresh, uint, 0644);
174 MODULE_PARM_DESC(irq_adapt_high_thresh,
175 "Threshold score for increasing IRQ moderation");
177 static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
178 NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
179 NETIF_MSG_IFUP | NETIF_MSG_RX_ERR |
180 NETIF_MSG_TX_ERR | NETIF_MSG_HW);
181 module_param(debug, uint, 0);
182 MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value");
184 /**************************************************************************
186 * Utility functions and prototypes
188 *************************************************************************/
190 static void efx_start_interrupts(struct efx_nic *efx, bool may_keep_eventq);
191 static void efx_stop_interrupts(struct efx_nic *efx, bool may_keep_eventq);
192 static void efx_remove_channel(struct efx_channel *channel);
193 static void efx_remove_channels(struct efx_nic *efx);
194 static const struct efx_channel_type efx_default_channel_type;
195 static void efx_remove_port(struct efx_nic *efx);
196 static void efx_init_napi_channel(struct efx_channel *channel);
197 static void efx_fini_napi(struct efx_nic *efx);
198 static void efx_fini_napi_channel(struct efx_channel *channel);
199 static void efx_fini_struct(struct efx_nic *efx);
200 static void efx_start_all(struct efx_nic *efx);
201 static void efx_stop_all(struct efx_nic *efx);
203 #define EFX_ASSERT_RESET_SERIALISED(efx) \
205 if ((efx->state == STATE_READY) || \
206 (efx->state == STATE_DISABLED)) \
210 static int efx_check_disabled(struct efx_nic *efx)
212 if (efx->state == STATE_DISABLED) {
213 netif_err(efx, drv, efx->net_dev,
214 "device is disabled due to earlier errors\n");
220 /**************************************************************************
222 * Event queue processing
224 *************************************************************************/
226 /* Process channel's event queue
228 * This function is responsible for processing the event queue of a
229 * single channel. The caller must guarantee that this function will
230 * never be concurrently called more than once on the same channel,
231 * though different channels may be being processed concurrently.
233 static int efx_process_channel(struct efx_channel *channel, int budget)
237 if (unlikely(!channel->enabled))
240 spent = efx_nic_process_eventq(channel, budget);
241 if (spent && efx_channel_has_rx_queue(channel)) {
242 struct efx_rx_queue *rx_queue =
243 efx_channel_get_rx_queue(channel);
245 /* Deliver last RX packet. */
246 if (channel->rx_pkt) {
247 __efx_rx_packet(channel, channel->rx_pkt);
248 channel->rx_pkt = NULL;
250 if (rx_queue->enabled) {
251 efx_rx_strategy(channel);
252 efx_fast_push_rx_descriptors(rx_queue);
259 /* Mark channel as finished processing
261 * Note that since we will not receive further interrupts for this
262 * channel before we finish processing and call the eventq_read_ack()
263 * method, there is no need to use the interrupt hold-off timers.
265 static inline void efx_channel_processed(struct efx_channel *channel)
267 /* The interrupt handler for this channel may set work_pending
268 * as soon as we acknowledge the events we've seen. Make sure
269 * it's cleared before then. */
270 channel->work_pending = false;
273 efx_nic_eventq_read_ack(channel);
278 * NAPI guarantees serialisation of polls of the same device, which
279 * provides the guarantee required by efx_process_channel().
281 static int efx_poll(struct napi_struct *napi, int budget)
283 struct efx_channel *channel =
284 container_of(napi, struct efx_channel, napi_str);
285 struct efx_nic *efx = channel->efx;
288 netif_vdbg(efx, intr, efx->net_dev,
289 "channel %d NAPI poll executing on CPU %d\n",
290 channel->channel, raw_smp_processor_id());
292 spent = efx_process_channel(channel, budget);
294 if (spent < budget) {
295 if (efx_channel_has_rx_queue(channel) &&
296 efx->irq_rx_adaptive &&
297 unlikely(++channel->irq_count == 1000)) {
298 if (unlikely(channel->irq_mod_score <
299 irq_adapt_low_thresh)) {
300 if (channel->irq_moderation > 1) {
301 channel->irq_moderation -= 1;
302 efx->type->push_irq_moderation(channel);
304 } else if (unlikely(channel->irq_mod_score >
305 irq_adapt_high_thresh)) {
306 if (channel->irq_moderation <
307 efx->irq_rx_moderation) {
308 channel->irq_moderation += 1;
309 efx->type->push_irq_moderation(channel);
312 channel->irq_count = 0;
313 channel->irq_mod_score = 0;
316 efx_filter_rfs_expire(channel);
318 /* There is no race here; although napi_disable() will
319 * only wait for napi_complete(), this isn't a problem
320 * since efx_channel_processed() will have no effect if
321 * interrupts have already been disabled.
324 efx_channel_processed(channel);
330 /* Process the eventq of the specified channel immediately on this CPU
332 * Disable hardware generated interrupts, wait for any existing
333 * processing to finish, then directly poll (and ack ) the eventq.
334 * Finally reenable NAPI and interrupts.
336 * This is for use only during a loopback self-test. It must not
337 * deliver any packets up the stack as this can result in deadlock.
339 void efx_process_channel_now(struct efx_channel *channel)
341 struct efx_nic *efx = channel->efx;
343 BUG_ON(channel->channel >= efx->n_channels);
344 BUG_ON(!channel->enabled);
345 BUG_ON(!efx->loopback_selftest);
347 /* Disable interrupts and wait for ISRs to complete */
348 efx_nic_disable_interrupts(efx);
349 if (efx->legacy_irq) {
350 synchronize_irq(efx->legacy_irq);
351 efx->legacy_irq_enabled = false;
354 synchronize_irq(channel->irq);
356 /* Wait for any NAPI processing to complete */
357 napi_disable(&channel->napi_str);
359 /* Poll the channel */
360 efx_process_channel(channel, channel->eventq_mask + 1);
362 /* Ack the eventq. This may cause an interrupt to be generated
363 * when they are reenabled */
364 efx_channel_processed(channel);
366 napi_enable(&channel->napi_str);
368 efx->legacy_irq_enabled = true;
369 efx_nic_enable_interrupts(efx);
372 /* Create event queue
373 * Event queue memory allocations are done only once. If the channel
374 * is reset, the memory buffer will be reused; this guards against
375 * errors during channel reset and also simplifies interrupt handling.
377 static int efx_probe_eventq(struct efx_channel *channel)
379 struct efx_nic *efx = channel->efx;
380 unsigned long entries;
382 netif_dbg(efx, probe, efx->net_dev,
383 "chan %d create event queue\n", channel->channel);
385 /* Build an event queue with room for one event per tx and rx buffer,
386 * plus some extra for link state events and MCDI completions. */
387 entries = roundup_pow_of_two(efx->rxq_entries + efx->txq_entries + 128);
388 EFX_BUG_ON_PARANOID(entries > EFX_MAX_EVQ_SIZE);
389 channel->eventq_mask = max(entries, EFX_MIN_EVQ_SIZE) - 1;
391 return efx_nic_probe_eventq(channel);
394 /* Prepare channel's event queue */
395 static void efx_init_eventq(struct efx_channel *channel)
397 netif_dbg(channel->efx, drv, channel->efx->net_dev,
398 "chan %d init event queue\n", channel->channel);
400 channel->eventq_read_ptr = 0;
402 efx_nic_init_eventq(channel);
405 /* Enable event queue processing and NAPI */
406 static void efx_start_eventq(struct efx_channel *channel)
408 netif_dbg(channel->efx, ifup, channel->efx->net_dev,
409 "chan %d start event queue\n", channel->channel);
411 /* The interrupt handler for this channel may set work_pending
412 * as soon as we enable it. Make sure it's cleared before
413 * then. Similarly, make sure it sees the enabled flag set.
415 channel->work_pending = false;
416 channel->enabled = true;
419 napi_enable(&channel->napi_str);
420 efx_nic_eventq_read_ack(channel);
423 /* Disable event queue processing and NAPI */
424 static void efx_stop_eventq(struct efx_channel *channel)
426 if (!channel->enabled)
429 napi_disable(&channel->napi_str);
430 channel->enabled = false;
433 static void efx_fini_eventq(struct efx_channel *channel)
435 netif_dbg(channel->efx, drv, channel->efx->net_dev,
436 "chan %d fini event queue\n", channel->channel);
438 efx_nic_fini_eventq(channel);
441 static void efx_remove_eventq(struct efx_channel *channel)
443 netif_dbg(channel->efx, drv, channel->efx->net_dev,
444 "chan %d remove event queue\n", channel->channel);
446 efx_nic_remove_eventq(channel);
449 /**************************************************************************
453 *************************************************************************/
455 /* Allocate and initialise a channel structure. */
456 static struct efx_channel *
457 efx_alloc_channel(struct efx_nic *efx, int i, struct efx_channel *old_channel)
459 struct efx_channel *channel;
460 struct efx_rx_queue *rx_queue;
461 struct efx_tx_queue *tx_queue;
464 channel = kzalloc(sizeof(*channel), GFP_KERNEL);
469 channel->channel = i;
470 channel->type = &efx_default_channel_type;
472 for (j = 0; j < EFX_TXQ_TYPES; j++) {
473 tx_queue = &channel->tx_queue[j];
475 tx_queue->queue = i * EFX_TXQ_TYPES + j;
476 tx_queue->channel = channel;
479 rx_queue = &channel->rx_queue;
481 setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill,
482 (unsigned long)rx_queue);
487 /* Allocate and initialise a channel structure, copying parameters
488 * (but not resources) from an old channel structure.
490 static struct efx_channel *
491 efx_copy_channel(const struct efx_channel *old_channel)
493 struct efx_channel *channel;
494 struct efx_rx_queue *rx_queue;
495 struct efx_tx_queue *tx_queue;
498 channel = kmalloc(sizeof(*channel), GFP_KERNEL);
502 *channel = *old_channel;
504 channel->napi_dev = NULL;
505 memset(&channel->eventq, 0, sizeof(channel->eventq));
507 for (j = 0; j < EFX_TXQ_TYPES; j++) {
508 tx_queue = &channel->tx_queue[j];
509 if (tx_queue->channel)
510 tx_queue->channel = channel;
511 tx_queue->buffer = NULL;
512 memset(&tx_queue->txd, 0, sizeof(tx_queue->txd));
515 rx_queue = &channel->rx_queue;
516 rx_queue->buffer = NULL;
517 memset(&rx_queue->rxd, 0, sizeof(rx_queue->rxd));
518 setup_timer(&rx_queue->slow_fill, efx_rx_slow_fill,
519 (unsigned long)rx_queue);
524 static int efx_probe_channel(struct efx_channel *channel)
526 struct efx_tx_queue *tx_queue;
527 struct efx_rx_queue *rx_queue;
530 netif_dbg(channel->efx, probe, channel->efx->net_dev,
531 "creating channel %d\n", channel->channel);
533 rc = channel->type->pre_probe(channel);
537 rc = efx_probe_eventq(channel);
541 efx_for_each_channel_tx_queue(tx_queue, channel) {
542 rc = efx_probe_tx_queue(tx_queue);
547 efx_for_each_channel_rx_queue(rx_queue, channel) {
548 rc = efx_probe_rx_queue(rx_queue);
553 channel->n_rx_frm_trunc = 0;
558 efx_remove_channel(channel);
563 efx_get_channel_name(struct efx_channel *channel, char *buf, size_t len)
565 struct efx_nic *efx = channel->efx;
569 number = channel->channel;
570 if (efx->tx_channel_offset == 0) {
572 } else if (channel->channel < efx->tx_channel_offset) {
576 number -= efx->tx_channel_offset;
578 snprintf(buf, len, "%s%s-%d", efx->name, type, number);
581 static void efx_set_channel_names(struct efx_nic *efx)
583 struct efx_channel *channel;
585 efx_for_each_channel(channel, efx)
586 channel->type->get_name(channel,
587 efx->channel_name[channel->channel],
588 sizeof(efx->channel_name[0]));
591 static int efx_probe_channels(struct efx_nic *efx)
593 struct efx_channel *channel;
596 /* Restart special buffer allocation */
597 efx->next_buffer_table = 0;
599 /* Probe channels in reverse, so that any 'extra' channels
600 * use the start of the buffer table. This allows the traffic
601 * channels to be resized without moving them or wasting the
602 * entries before them.
604 efx_for_each_channel_rev(channel, efx) {
605 rc = efx_probe_channel(channel);
607 netif_err(efx, probe, efx->net_dev,
608 "failed to create channel %d\n",
613 efx_set_channel_names(efx);
618 efx_remove_channels(efx);
622 /* Channels are shutdown and reinitialised whilst the NIC is running
623 * to propagate configuration changes (mtu, checksum offload), or
624 * to clear hardware error conditions
626 static void efx_start_datapath(struct efx_nic *efx)
628 struct efx_tx_queue *tx_queue;
629 struct efx_rx_queue *rx_queue;
630 struct efx_channel *channel;
632 /* Calculate the rx buffer allocation parameters required to
633 * support the current MTU, including padding for header
634 * alignment and overruns.
636 efx->rx_buffer_len = (max(EFX_PAGE_IP_ALIGN, NET_IP_ALIGN) +
637 EFX_MAX_FRAME_LEN(efx->net_dev->mtu) +
638 efx->type->rx_buffer_hash_size +
639 efx->type->rx_buffer_padding);
640 efx->rx_buffer_order = get_order(efx->rx_buffer_len +
641 sizeof(struct efx_rx_page_state));
643 /* We must keep at least one descriptor in a TX ring empty.
644 * We could avoid this when the queue size does not exactly
645 * match the hardware ring size, but it's not that important.
646 * Therefore we stop the queue when one more skb might fill
647 * the ring completely. We wake it when half way back to
650 efx->txq_stop_thresh = efx->txq_entries - efx_tx_max_skb_descs(efx);
651 efx->txq_wake_thresh = efx->txq_stop_thresh / 2;
653 /* Initialise the channels */
654 efx_for_each_channel(channel, efx) {
655 efx_for_each_channel_tx_queue(tx_queue, channel)
656 efx_init_tx_queue(tx_queue);
658 /* The rx buffer allocation strategy is MTU dependent */
659 efx_rx_strategy(channel);
661 efx_for_each_channel_rx_queue(rx_queue, channel) {
662 efx_init_rx_queue(rx_queue);
663 efx_nic_generate_fill_event(rx_queue);
666 WARN_ON(channel->rx_pkt != NULL);
667 efx_rx_strategy(channel);
670 if (netif_device_present(efx->net_dev))
671 netif_tx_wake_all_queues(efx->net_dev);
674 static void efx_stop_datapath(struct efx_nic *efx)
676 struct efx_channel *channel;
677 struct efx_tx_queue *tx_queue;
678 struct efx_rx_queue *rx_queue;
679 struct pci_dev *dev = efx->pci_dev;
682 EFX_ASSERT_RESET_SERIALISED(efx);
683 BUG_ON(efx->port_enabled);
685 /* Only perform flush if dma is enabled */
686 if (dev->is_busmaster) {
687 rc = efx_nic_flush_queues(efx);
689 if (rc && EFX_WORKAROUND_7803(efx)) {
690 /* Schedule a reset to recover from the flush failure. The
691 * descriptor caches reference memory we're about to free,
692 * but falcon_reconfigure_mac_wrapper() won't reconnect
693 * the MACs because of the pending reset. */
694 netif_err(efx, drv, efx->net_dev,
695 "Resetting to recover from flush failure\n");
696 efx_schedule_reset(efx, RESET_TYPE_ALL);
698 netif_err(efx, drv, efx->net_dev, "failed to flush queues\n");
700 netif_dbg(efx, drv, efx->net_dev,
701 "successfully flushed all queues\n");
705 efx_for_each_channel(channel, efx) {
706 /* RX packet processing is pipelined, so wait for the
707 * NAPI handler to complete. At least event queue 0
708 * might be kept active by non-data events, so don't
709 * use napi_synchronize() but actually disable NAPI
712 if (efx_channel_has_rx_queue(channel)) {
713 efx_stop_eventq(channel);
714 efx_start_eventq(channel);
717 efx_for_each_channel_rx_queue(rx_queue, channel)
718 efx_fini_rx_queue(rx_queue);
719 efx_for_each_possible_channel_tx_queue(tx_queue, channel)
720 efx_fini_tx_queue(tx_queue);
724 static void efx_remove_channel(struct efx_channel *channel)
726 struct efx_tx_queue *tx_queue;
727 struct efx_rx_queue *rx_queue;
729 netif_dbg(channel->efx, drv, channel->efx->net_dev,
730 "destroy chan %d\n", channel->channel);
732 efx_for_each_channel_rx_queue(rx_queue, channel)
733 efx_remove_rx_queue(rx_queue);
734 efx_for_each_possible_channel_tx_queue(tx_queue, channel)
735 efx_remove_tx_queue(tx_queue);
736 efx_remove_eventq(channel);
737 channel->type->post_remove(channel);
740 static void efx_remove_channels(struct efx_nic *efx)
742 struct efx_channel *channel;
744 efx_for_each_channel(channel, efx)
745 efx_remove_channel(channel);
749 efx_realloc_channels(struct efx_nic *efx, u32 rxq_entries, u32 txq_entries)
751 struct efx_channel *other_channel[EFX_MAX_CHANNELS], *channel;
752 u32 old_rxq_entries, old_txq_entries;
753 unsigned i, next_buffer_table = 0;
756 rc = efx_check_disabled(efx);
760 /* Not all channels should be reallocated. We must avoid
761 * reallocating their buffer table entries.
763 efx_for_each_channel(channel, efx) {
764 struct efx_rx_queue *rx_queue;
765 struct efx_tx_queue *tx_queue;
767 if (channel->type->copy)
769 next_buffer_table = max(next_buffer_table,
770 channel->eventq.index +
771 channel->eventq.entries);
772 efx_for_each_channel_rx_queue(rx_queue, channel)
773 next_buffer_table = max(next_buffer_table,
774 rx_queue->rxd.index +
775 rx_queue->rxd.entries);
776 efx_for_each_channel_tx_queue(tx_queue, channel)
777 next_buffer_table = max(next_buffer_table,
778 tx_queue->txd.index +
779 tx_queue->txd.entries);
782 efx_device_detach_sync(efx);
784 efx_stop_interrupts(efx, true);
786 /* Clone channels (where possible) */
787 memset(other_channel, 0, sizeof(other_channel));
788 for (i = 0; i < efx->n_channels; i++) {
789 channel = efx->channel[i];
790 if (channel->type->copy)
791 channel = channel->type->copy(channel);
796 other_channel[i] = channel;
799 /* Swap entry counts and channel pointers */
800 old_rxq_entries = efx->rxq_entries;
801 old_txq_entries = efx->txq_entries;
802 efx->rxq_entries = rxq_entries;
803 efx->txq_entries = txq_entries;
804 for (i = 0; i < efx->n_channels; i++) {
805 channel = efx->channel[i];
806 efx->channel[i] = other_channel[i];
807 other_channel[i] = channel;
810 /* Restart buffer table allocation */
811 efx->next_buffer_table = next_buffer_table;
813 for (i = 0; i < efx->n_channels; i++) {
814 channel = efx->channel[i];
815 if (!channel->type->copy)
817 rc = efx_probe_channel(channel);
820 efx_init_napi_channel(efx->channel[i]);
824 /* Destroy unused channel structures */
825 for (i = 0; i < efx->n_channels; i++) {
826 channel = other_channel[i];
827 if (channel && channel->type->copy) {
828 efx_fini_napi_channel(channel);
829 efx_remove_channel(channel);
834 efx_start_interrupts(efx, true);
836 netif_device_attach(efx->net_dev);
841 efx->rxq_entries = old_rxq_entries;
842 efx->txq_entries = old_txq_entries;
843 for (i = 0; i < efx->n_channels; i++) {
844 channel = efx->channel[i];
845 efx->channel[i] = other_channel[i];
846 other_channel[i] = channel;
851 void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue)
853 mod_timer(&rx_queue->slow_fill, jiffies + msecs_to_jiffies(100));
856 static const struct efx_channel_type efx_default_channel_type = {
857 .pre_probe = efx_channel_dummy_op_int,
858 .post_remove = efx_channel_dummy_op_void,
859 .get_name = efx_get_channel_name,
860 .copy = efx_copy_channel,
861 .keep_eventq = false,
864 int efx_channel_dummy_op_int(struct efx_channel *channel)
869 void efx_channel_dummy_op_void(struct efx_channel *channel)
873 /**************************************************************************
877 **************************************************************************/
879 /* This ensures that the kernel is kept informed (via
880 * netif_carrier_on/off) of the link status, and also maintains the
881 * link status's stop on the port's TX queue.
883 void efx_link_status_changed(struct efx_nic *efx)
885 struct efx_link_state *link_state = &efx->link_state;
887 /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
888 * that no events are triggered between unregister_netdev() and the
889 * driver unloading. A more general condition is that NETDEV_CHANGE
890 * can only be generated between NETDEV_UP and NETDEV_DOWN */
891 if (!netif_running(efx->net_dev))
894 if (link_state->up != netif_carrier_ok(efx->net_dev)) {
895 efx->n_link_state_changes++;
898 netif_carrier_on(efx->net_dev);
900 netif_carrier_off(efx->net_dev);
903 /* Status message for kernel log */
905 netif_info(efx, link, efx->net_dev,
906 "link up at %uMbps %s-duplex (MTU %d)%s\n",
907 link_state->speed, link_state->fd ? "full" : "half",
909 (efx->promiscuous ? " [PROMISC]" : ""));
911 netif_info(efx, link, efx->net_dev, "link down\n");
914 void efx_link_set_advertising(struct efx_nic *efx, u32 advertising)
916 efx->link_advertising = advertising;
918 if (advertising & ADVERTISED_Pause)
919 efx->wanted_fc |= (EFX_FC_TX | EFX_FC_RX);
921 efx->wanted_fc &= ~(EFX_FC_TX | EFX_FC_RX);
922 if (advertising & ADVERTISED_Asym_Pause)
923 efx->wanted_fc ^= EFX_FC_TX;
927 void efx_link_set_wanted_fc(struct efx_nic *efx, u8 wanted_fc)
929 efx->wanted_fc = wanted_fc;
930 if (efx->link_advertising) {
931 if (wanted_fc & EFX_FC_RX)
932 efx->link_advertising |= (ADVERTISED_Pause |
933 ADVERTISED_Asym_Pause);
935 efx->link_advertising &= ~(ADVERTISED_Pause |
936 ADVERTISED_Asym_Pause);
937 if (wanted_fc & EFX_FC_TX)
938 efx->link_advertising ^= ADVERTISED_Asym_Pause;
942 static void efx_fini_port(struct efx_nic *efx);
944 /* Push loopback/power/transmit disable settings to the PHY, and reconfigure
945 * the MAC appropriately. All other PHY configuration changes are pushed
946 * through phy_op->set_settings(), and pushed asynchronously to the MAC
947 * through efx_monitor().
949 * Callers must hold the mac_lock
951 int __efx_reconfigure_port(struct efx_nic *efx)
953 enum efx_phy_mode phy_mode;
956 WARN_ON(!mutex_is_locked(&efx->mac_lock));
958 /* Serialise the promiscuous flag with efx_set_rx_mode. */
959 netif_addr_lock_bh(efx->net_dev);
960 netif_addr_unlock_bh(efx->net_dev);
962 /* Disable PHY transmit in mac level loopbacks */
963 phy_mode = efx->phy_mode;
964 if (LOOPBACK_INTERNAL(efx))
965 efx->phy_mode |= PHY_MODE_TX_DISABLED;
967 efx->phy_mode &= ~PHY_MODE_TX_DISABLED;
969 rc = efx->type->reconfigure_port(efx);
972 efx->phy_mode = phy_mode;
977 /* Reinitialise the MAC to pick up new PHY settings, even if the port is
979 int efx_reconfigure_port(struct efx_nic *efx)
983 EFX_ASSERT_RESET_SERIALISED(efx);
985 mutex_lock(&efx->mac_lock);
986 rc = __efx_reconfigure_port(efx);
987 mutex_unlock(&efx->mac_lock);
992 /* Asynchronous work item for changing MAC promiscuity and multicast
993 * hash. Avoid a drain/rx_ingress enable by reconfiguring the current
995 static void efx_mac_work(struct work_struct *data)
997 struct efx_nic *efx = container_of(data, struct efx_nic, mac_work);
999 mutex_lock(&efx->mac_lock);
1000 if (efx->port_enabled)
1001 efx->type->reconfigure_mac(efx);
1002 mutex_unlock(&efx->mac_lock);
1005 static int efx_probe_port(struct efx_nic *efx)
1009 netif_dbg(efx, probe, efx->net_dev, "create port\n");
1012 efx->phy_mode = PHY_MODE_SPECIAL;
1014 /* Connect up MAC/PHY operations table */
1015 rc = efx->type->probe_port(efx);
1019 /* Initialise MAC address to permanent address */
1020 memcpy(efx->net_dev->dev_addr, efx->net_dev->perm_addr, ETH_ALEN);
1025 static int efx_init_port(struct efx_nic *efx)
1029 netif_dbg(efx, drv, efx->net_dev, "init port\n");
1031 mutex_lock(&efx->mac_lock);
1033 rc = efx->phy_op->init(efx);
1037 efx->port_initialized = true;
1039 /* Reconfigure the MAC before creating dma queues (required for
1040 * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */
1041 efx->type->reconfigure_mac(efx);
1043 /* Ensure the PHY advertises the correct flow control settings */
1044 rc = efx->phy_op->reconfigure(efx);
1048 mutex_unlock(&efx->mac_lock);
1052 efx->phy_op->fini(efx);
1054 mutex_unlock(&efx->mac_lock);
1058 static void efx_start_port(struct efx_nic *efx)
1060 netif_dbg(efx, ifup, efx->net_dev, "start port\n");
1061 BUG_ON(efx->port_enabled);
1063 mutex_lock(&efx->mac_lock);
1064 efx->port_enabled = true;
1066 /* efx_mac_work() might have been scheduled after efx_stop_port(),
1067 * and then cancelled by efx_flush_all() */
1068 efx->type->reconfigure_mac(efx);
1070 mutex_unlock(&efx->mac_lock);
1073 /* Prevent efx_mac_work() and efx_monitor() from working */
1074 static void efx_stop_port(struct efx_nic *efx)
1076 netif_dbg(efx, ifdown, efx->net_dev, "stop port\n");
1078 mutex_lock(&efx->mac_lock);
1079 efx->port_enabled = false;
1080 mutex_unlock(&efx->mac_lock);
1082 /* Serialise against efx_set_multicast_list() */
1083 netif_addr_lock_bh(efx->net_dev);
1084 netif_addr_unlock_bh(efx->net_dev);
1087 static void efx_fini_port(struct efx_nic *efx)
1089 netif_dbg(efx, drv, efx->net_dev, "shut down port\n");
1091 if (!efx->port_initialized)
1094 efx->phy_op->fini(efx);
1095 efx->port_initialized = false;
1097 efx->link_state.up = false;
1098 efx_link_status_changed(efx);
1101 static void efx_remove_port(struct efx_nic *efx)
1103 netif_dbg(efx, drv, efx->net_dev, "destroying port\n");
1105 efx->type->remove_port(efx);
1108 /**************************************************************************
1112 **************************************************************************/
1114 /* This configures the PCI device to enable I/O and DMA. */
1115 static int efx_init_io(struct efx_nic *efx)
1117 struct pci_dev *pci_dev = efx->pci_dev;
1118 dma_addr_t dma_mask = efx->type->max_dma_mask;
1121 netif_dbg(efx, probe, efx->net_dev, "initialising I/O\n");
1123 rc = pci_enable_device(pci_dev);
1125 netif_err(efx, probe, efx->net_dev,
1126 "failed to enable PCI device\n");
1130 pci_set_master(pci_dev);
1132 /* Set the PCI DMA mask. Try all possibilities from our
1133 * genuine mask down to 32 bits, because some architectures
1134 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
1135 * masks event though they reject 46 bit masks.
1137 while (dma_mask > 0x7fffffffUL) {
1138 if (dma_supported(&pci_dev->dev, dma_mask)) {
1139 rc = dma_set_mask(&pci_dev->dev, dma_mask);
1146 netif_err(efx, probe, efx->net_dev,
1147 "could not find a suitable DMA mask\n");
1150 netif_dbg(efx, probe, efx->net_dev,
1151 "using DMA mask %llx\n", (unsigned long long) dma_mask);
1152 rc = dma_set_coherent_mask(&pci_dev->dev, dma_mask);
1154 /* dma_set_coherent_mask() is not *allowed* to
1155 * fail with a mask that dma_set_mask() accepted,
1156 * but just in case...
1158 netif_err(efx, probe, efx->net_dev,
1159 "failed to set consistent DMA mask\n");
1163 efx->membase_phys = pci_resource_start(efx->pci_dev, EFX_MEM_BAR);
1164 rc = pci_request_region(pci_dev, EFX_MEM_BAR, "sfc");
1166 netif_err(efx, probe, efx->net_dev,
1167 "request for memory BAR failed\n");
1171 efx->membase = ioremap_nocache(efx->membase_phys,
1172 efx->type->mem_map_size);
1173 if (!efx->membase) {
1174 netif_err(efx, probe, efx->net_dev,
1175 "could not map memory BAR at %llx+%x\n",
1176 (unsigned long long)efx->membase_phys,
1177 efx->type->mem_map_size);
1181 netif_dbg(efx, probe, efx->net_dev,
1182 "memory BAR at %llx+%x (virtual %p)\n",
1183 (unsigned long long)efx->membase_phys,
1184 efx->type->mem_map_size, efx->membase);
1189 pci_release_region(efx->pci_dev, EFX_MEM_BAR);
1191 efx->membase_phys = 0;
1193 pci_disable_device(efx->pci_dev);
1198 static void efx_fini_io(struct efx_nic *efx)
1200 netif_dbg(efx, drv, efx->net_dev, "shutting down I/O\n");
1203 iounmap(efx->membase);
1204 efx->membase = NULL;
1207 if (efx->membase_phys) {
1208 pci_release_region(efx->pci_dev, EFX_MEM_BAR);
1209 efx->membase_phys = 0;
1212 pci_disable_device(efx->pci_dev);
1215 static unsigned int efx_wanted_parallelism(struct efx_nic *efx)
1217 cpumask_var_t thread_mask;
1224 if (unlikely(!zalloc_cpumask_var(&thread_mask, GFP_KERNEL))) {
1225 netif_warn(efx, probe, efx->net_dev,
1226 "RSS disabled due to allocation failure\n");
1231 for_each_online_cpu(cpu) {
1232 if (!cpumask_test_cpu(cpu, thread_mask)) {
1234 cpumask_or(thread_mask, thread_mask,
1235 topology_thread_cpumask(cpu));
1239 free_cpumask_var(thread_mask);
1242 /* If RSS is requested for the PF *and* VFs then we can't write RSS
1243 * table entries that are inaccessible to VFs
1245 if (efx_sriov_wanted(efx) && efx_vf_size(efx) > 1 &&
1246 count > efx_vf_size(efx)) {
1247 netif_warn(efx, probe, efx->net_dev,
1248 "Reducing number of RSS channels from %u to %u for "
1249 "VF support. Increase vf-msix-limit to use more "
1250 "channels on the PF.\n",
1251 count, efx_vf_size(efx));
1252 count = efx_vf_size(efx);
1259 efx_init_rx_cpu_rmap(struct efx_nic *efx, struct msix_entry *xentries)
1261 #ifdef CONFIG_RFS_ACCEL
1265 efx->net_dev->rx_cpu_rmap = alloc_irq_cpu_rmap(efx->n_rx_channels);
1266 if (!efx->net_dev->rx_cpu_rmap)
1268 for (i = 0; i < efx->n_rx_channels; i++) {
1269 rc = irq_cpu_rmap_add(efx->net_dev->rx_cpu_rmap,
1270 xentries[i].vector);
1272 free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap);
1273 efx->net_dev->rx_cpu_rmap = NULL;
1281 /* Probe the number and type of interrupts we are able to obtain, and
1282 * the resulting numbers of channels and RX queues.
1284 static int efx_probe_interrupts(struct efx_nic *efx)
1286 unsigned int max_channels =
1287 min(efx->type->phys_addr_channels, EFX_MAX_CHANNELS);
1288 unsigned int extra_channels = 0;
1292 for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++)
1293 if (efx->extra_channel_type[i])
1296 if (efx->interrupt_mode == EFX_INT_MODE_MSIX) {
1297 struct msix_entry xentries[EFX_MAX_CHANNELS];
1298 unsigned int n_channels;
1300 n_channels = efx_wanted_parallelism(efx);
1301 if (separate_tx_channels)
1303 n_channels += extra_channels;
1304 n_channels = min(n_channels, max_channels);
1306 for (i = 0; i < n_channels; i++)
1307 xentries[i].entry = i;
1308 rc = pci_enable_msix(efx->pci_dev, xentries, n_channels);
1310 netif_err(efx, drv, efx->net_dev,
1311 "WARNING: Insufficient MSI-X vectors"
1312 " available (%d < %u).\n", rc, n_channels);
1313 netif_err(efx, drv, efx->net_dev,
1314 "WARNING: Performance may be reduced.\n");
1315 EFX_BUG_ON_PARANOID(rc >= n_channels);
1317 rc = pci_enable_msix(efx->pci_dev, xentries,
1322 efx->n_channels = n_channels;
1323 if (n_channels > extra_channels)
1324 n_channels -= extra_channels;
1325 if (separate_tx_channels) {
1326 efx->n_tx_channels = max(n_channels / 2, 1U);
1327 efx->n_rx_channels = max(n_channels -
1331 efx->n_tx_channels = n_channels;
1332 efx->n_rx_channels = n_channels;
1334 rc = efx_init_rx_cpu_rmap(efx, xentries);
1336 pci_disable_msix(efx->pci_dev);
1339 for (i = 0; i < efx->n_channels; i++)
1340 efx_get_channel(efx, i)->irq =
1343 /* Fall back to single channel MSI */
1344 efx->interrupt_mode = EFX_INT_MODE_MSI;
1345 netif_err(efx, drv, efx->net_dev,
1346 "could not enable MSI-X\n");
1350 /* Try single interrupt MSI */
1351 if (efx->interrupt_mode == EFX_INT_MODE_MSI) {
1352 efx->n_channels = 1;
1353 efx->n_rx_channels = 1;
1354 efx->n_tx_channels = 1;
1355 rc = pci_enable_msi(efx->pci_dev);
1357 efx_get_channel(efx, 0)->irq = efx->pci_dev->irq;
1359 netif_err(efx, drv, efx->net_dev,
1360 "could not enable MSI\n");
1361 efx->interrupt_mode = EFX_INT_MODE_LEGACY;
1365 /* Assume legacy interrupts */
1366 if (efx->interrupt_mode == EFX_INT_MODE_LEGACY) {
1367 efx->n_channels = 1 + (separate_tx_channels ? 1 : 0);
1368 efx->n_rx_channels = 1;
1369 efx->n_tx_channels = 1;
1370 efx->legacy_irq = efx->pci_dev->irq;
1373 /* Assign extra channels if possible */
1374 j = efx->n_channels;
1375 for (i = 0; i < EFX_MAX_EXTRA_CHANNELS; i++) {
1376 if (!efx->extra_channel_type[i])
1378 if (efx->interrupt_mode != EFX_INT_MODE_MSIX ||
1379 efx->n_channels <= extra_channels) {
1380 efx->extra_channel_type[i]->handle_no_channel(efx);
1383 efx_get_channel(efx, j)->type =
1384 efx->extra_channel_type[i];
1388 /* RSS might be usable on VFs even if it is disabled on the PF */
1389 efx->rss_spread = ((efx->n_rx_channels > 1 || !efx_sriov_wanted(efx)) ?
1390 efx->n_rx_channels : efx_vf_size(efx));
1395 /* Enable interrupts, then probe and start the event queues */
1396 static void efx_start_interrupts(struct efx_nic *efx, bool may_keep_eventq)
1398 struct efx_channel *channel;
1400 BUG_ON(efx->state == STATE_DISABLED);
1402 if (efx->legacy_irq)
1403 efx->legacy_irq_enabled = true;
1404 efx_nic_enable_interrupts(efx);
1406 efx_for_each_channel(channel, efx) {
1407 if (!channel->type->keep_eventq || !may_keep_eventq)
1408 efx_init_eventq(channel);
1409 efx_start_eventq(channel);
1412 efx_mcdi_mode_event(efx);
1415 static void efx_stop_interrupts(struct efx_nic *efx, bool may_keep_eventq)
1417 struct efx_channel *channel;
1419 if (efx->state == STATE_DISABLED)
1422 efx_mcdi_mode_poll(efx);
1424 efx_nic_disable_interrupts(efx);
1425 if (efx->legacy_irq) {
1426 synchronize_irq(efx->legacy_irq);
1427 efx->legacy_irq_enabled = false;
1430 efx_for_each_channel(channel, efx) {
1432 synchronize_irq(channel->irq);
1434 efx_stop_eventq(channel);
1435 if (!channel->type->keep_eventq || !may_keep_eventq)
1436 efx_fini_eventq(channel);
1440 static void efx_remove_interrupts(struct efx_nic *efx)
1442 struct efx_channel *channel;
1444 /* Remove MSI/MSI-X interrupts */
1445 efx_for_each_channel(channel, efx)
1447 pci_disable_msi(efx->pci_dev);
1448 pci_disable_msix(efx->pci_dev);
1450 /* Remove legacy interrupt */
1451 efx->legacy_irq = 0;
1454 static void efx_set_channels(struct efx_nic *efx)
1456 struct efx_channel *channel;
1457 struct efx_tx_queue *tx_queue;
1459 efx->tx_channel_offset =
1460 separate_tx_channels ? efx->n_channels - efx->n_tx_channels : 0;
1462 /* We need to mark which channels really have RX and TX
1463 * queues, and adjust the TX queue numbers if we have separate
1464 * RX-only and TX-only channels.
1466 efx_for_each_channel(channel, efx) {
1467 if (channel->channel < efx->n_rx_channels)
1468 channel->rx_queue.core_index = channel->channel;
1470 channel->rx_queue.core_index = -1;
1472 efx_for_each_channel_tx_queue(tx_queue, channel)
1473 tx_queue->queue -= (efx->tx_channel_offset *
1478 static int efx_probe_nic(struct efx_nic *efx)
1483 netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
1485 /* Carry out hardware-type specific initialisation */
1486 rc = efx->type->probe(efx);
1490 /* Determine the number of channels and queues by trying to hook
1491 * in MSI-X interrupts. */
1492 rc = efx_probe_interrupts(efx);
1496 efx->type->dimension_resources(efx);
1498 if (efx->n_channels > 1)
1499 get_random_bytes(&efx->rx_hash_key, sizeof(efx->rx_hash_key));
1500 for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++)
1501 efx->rx_indir_table[i] =
1502 ethtool_rxfh_indir_default(i, efx->rss_spread);
1504 efx_set_channels(efx);
1505 netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels);
1506 netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels);
1508 /* Initialise the interrupt moderation settings */
1509 efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true,
1515 efx->type->remove(efx);
1519 static void efx_remove_nic(struct efx_nic *efx)
1521 netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");
1523 efx_remove_interrupts(efx);
1524 efx->type->remove(efx);
1527 /**************************************************************************
1529 * NIC startup/shutdown
1531 *************************************************************************/
1533 static int efx_probe_all(struct efx_nic *efx)
1537 rc = efx_probe_nic(efx);
1539 netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
1543 rc = efx_probe_port(efx);
1545 netif_err(efx, probe, efx->net_dev, "failed to create port\n");
1549 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT);
1550 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) {
1554 efx->rxq_entries = efx->txq_entries = EFX_DEFAULT_DMAQ_SIZE;
1556 rc = efx_probe_filters(efx);
1558 netif_err(efx, probe, efx->net_dev,
1559 "failed to create filter tables\n");
1563 rc = efx_probe_channels(efx);
1570 efx_remove_filters(efx);
1572 efx_remove_port(efx);
1574 efx_remove_nic(efx);
1579 /* If the interface is supposed to be running but is not, start
1580 * the hardware and software data path, regular activity for the port
1581 * (MAC statistics, link polling, etc.) and schedule the port to be
1582 * reconfigured. Interrupts must already be enabled. This function
1583 * is safe to call multiple times, so long as the NIC is not disabled.
1584 * Requires the RTNL lock.
1586 static void efx_start_all(struct efx_nic *efx)
1588 EFX_ASSERT_RESET_SERIALISED(efx);
1589 BUG_ON(efx->state == STATE_DISABLED);
1591 /* Check that it is appropriate to restart the interface. All
1592 * of these flags are safe to read under just the rtnl lock */
1593 if (efx->port_enabled || !netif_running(efx->net_dev))
1596 efx_start_port(efx);
1597 efx_start_datapath(efx);
1599 /* Start the hardware monitor if there is one. Otherwise (we're link
1600 * event driven), we have to poll the PHY because after an event queue
1601 * flush, we could have a missed a link state change */
1602 if (efx->type->monitor != NULL) {
1603 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1604 efx_monitor_interval);
1606 mutex_lock(&efx->mac_lock);
1607 if (efx->phy_op->poll(efx))
1608 efx_link_status_changed(efx);
1609 mutex_unlock(&efx->mac_lock);
1612 efx->type->start_stats(efx);
1615 /* Flush all delayed work. Should only be called when no more delayed work
1616 * will be scheduled. This doesn't flush pending online resets (efx_reset),
1617 * since we're holding the rtnl_lock at this point. */
1618 static void efx_flush_all(struct efx_nic *efx)
1620 /* Make sure the hardware monitor and event self-test are stopped */
1621 cancel_delayed_work_sync(&efx->monitor_work);
1622 efx_selftest_async_cancel(efx);
1623 /* Stop scheduled port reconfigurations */
1624 cancel_work_sync(&efx->mac_work);
1627 /* Quiesce the hardware and software data path, and regular activity
1628 * for the port without bringing the link down. Safe to call multiple
1629 * times with the NIC in almost any state, but interrupts should be
1630 * enabled. Requires the RTNL lock.
1632 static void efx_stop_all(struct efx_nic *efx)
1634 EFX_ASSERT_RESET_SERIALISED(efx);
1636 /* port_enabled can be read safely under the rtnl lock */
1637 if (!efx->port_enabled)
1640 efx->type->stop_stats(efx);
1643 /* Flush efx_mac_work(), refill_workqueue, monitor_work */
1646 /* Stop the kernel transmit interface. This is only valid if
1647 * the device is stopped or detached; otherwise the watchdog
1648 * may fire immediately.
1650 WARN_ON(netif_running(efx->net_dev) &&
1651 netif_device_present(efx->net_dev));
1652 netif_tx_disable(efx->net_dev);
1654 efx_stop_datapath(efx);
1657 static void efx_remove_all(struct efx_nic *efx)
1659 efx_remove_channels(efx);
1660 efx_remove_filters(efx);
1661 efx_remove_port(efx);
1662 efx_remove_nic(efx);
1665 /**************************************************************************
1667 * Interrupt moderation
1669 **************************************************************************/
1671 static unsigned int irq_mod_ticks(unsigned int usecs, unsigned int quantum_ns)
1675 if (usecs * 1000 < quantum_ns)
1676 return 1; /* never round down to 0 */
1677 return usecs * 1000 / quantum_ns;
1680 /* Set interrupt moderation parameters */
1681 int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
1682 unsigned int rx_usecs, bool rx_adaptive,
1683 bool rx_may_override_tx)
1685 struct efx_channel *channel;
1686 unsigned int irq_mod_max = DIV_ROUND_UP(efx->type->timer_period_max *
1687 efx->timer_quantum_ns,
1689 unsigned int tx_ticks;
1690 unsigned int rx_ticks;
1692 EFX_ASSERT_RESET_SERIALISED(efx);
1694 if (tx_usecs > irq_mod_max || rx_usecs > irq_mod_max)
1697 tx_ticks = irq_mod_ticks(tx_usecs, efx->timer_quantum_ns);
1698 rx_ticks = irq_mod_ticks(rx_usecs, efx->timer_quantum_ns);
1700 if (tx_ticks != rx_ticks && efx->tx_channel_offset == 0 &&
1701 !rx_may_override_tx) {
1702 netif_err(efx, drv, efx->net_dev, "Channels are shared. "
1703 "RX and TX IRQ moderation must be equal\n");
1707 efx->irq_rx_adaptive = rx_adaptive;
1708 efx->irq_rx_moderation = rx_ticks;
1709 efx_for_each_channel(channel, efx) {
1710 if (efx_channel_has_rx_queue(channel))
1711 channel->irq_moderation = rx_ticks;
1712 else if (efx_channel_has_tx_queues(channel))
1713 channel->irq_moderation = tx_ticks;
1719 void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
1720 unsigned int *rx_usecs, bool *rx_adaptive)
1722 /* We must round up when converting ticks to microseconds
1723 * because we round down when converting the other way.
1726 *rx_adaptive = efx->irq_rx_adaptive;
1727 *rx_usecs = DIV_ROUND_UP(efx->irq_rx_moderation *
1728 efx->timer_quantum_ns,
1731 /* If channels are shared between RX and TX, so is IRQ
1732 * moderation. Otherwise, IRQ moderation is the same for all
1733 * TX channels and is not adaptive.
1735 if (efx->tx_channel_offset == 0)
1736 *tx_usecs = *rx_usecs;
1738 *tx_usecs = DIV_ROUND_UP(
1739 efx->channel[efx->tx_channel_offset]->irq_moderation *
1740 efx->timer_quantum_ns,
1744 /**************************************************************************
1748 **************************************************************************/
1750 /* Run periodically off the general workqueue */
1751 static void efx_monitor(struct work_struct *data)
1753 struct efx_nic *efx = container_of(data, struct efx_nic,
1756 netif_vdbg(efx, timer, efx->net_dev,
1757 "hardware monitor executing on CPU %d\n",
1758 raw_smp_processor_id());
1759 BUG_ON(efx->type->monitor == NULL);
1761 /* If the mac_lock is already held then it is likely a port
1762 * reconfiguration is already in place, which will likely do
1763 * most of the work of monitor() anyway. */
1764 if (mutex_trylock(&efx->mac_lock)) {
1765 if (efx->port_enabled)
1766 efx->type->monitor(efx);
1767 mutex_unlock(&efx->mac_lock);
1770 queue_delayed_work(efx->workqueue, &efx->monitor_work,
1771 efx_monitor_interval);
1774 /**************************************************************************
1778 *************************************************************************/
1781 * Context: process, rtnl_lock() held.
1783 static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
1785 struct efx_nic *efx = netdev_priv(net_dev);
1786 struct mii_ioctl_data *data = if_mii(ifr);
1788 if (cmd == SIOCSHWTSTAMP)
1789 return efx_ptp_ioctl(efx, ifr, cmd);
1791 /* Convert phy_id from older PRTAD/DEVAD format */
1792 if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
1793 (data->phy_id & 0xfc00) == 0x0400)
1794 data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;
1796 return mdio_mii_ioctl(&efx->mdio, data, cmd);
1799 /**************************************************************************
1803 **************************************************************************/
1805 static void efx_init_napi_channel(struct efx_channel *channel)
1807 struct efx_nic *efx = channel->efx;
1809 channel->napi_dev = efx->net_dev;
1810 netif_napi_add(channel->napi_dev, &channel->napi_str,
1811 efx_poll, napi_weight);
1814 static void efx_init_napi(struct efx_nic *efx)
1816 struct efx_channel *channel;
1818 efx_for_each_channel(channel, efx)
1819 efx_init_napi_channel(channel);
1822 static void efx_fini_napi_channel(struct efx_channel *channel)
1824 if (channel->napi_dev)
1825 netif_napi_del(&channel->napi_str);
1826 channel->napi_dev = NULL;
1829 static void efx_fini_napi(struct efx_nic *efx)
1831 struct efx_channel *channel;
1833 efx_for_each_channel(channel, efx)
1834 efx_fini_napi_channel(channel);
1837 /**************************************************************************
1839 * Kernel netpoll interface
1841 *************************************************************************/
1843 #ifdef CONFIG_NET_POLL_CONTROLLER
1845 /* Although in the common case interrupts will be disabled, this is not
1846 * guaranteed. However, all our work happens inside the NAPI callback,
1847 * so no locking is required.
1849 static void efx_netpoll(struct net_device *net_dev)
1851 struct efx_nic *efx = netdev_priv(net_dev);
1852 struct efx_channel *channel;
1854 efx_for_each_channel(channel, efx)
1855 efx_schedule_channel(channel);
1860 /**************************************************************************
1862 * Kernel net device interface
1864 *************************************************************************/
1866 /* Context: process, rtnl_lock() held. */
1867 static int efx_net_open(struct net_device *net_dev)
1869 struct efx_nic *efx = netdev_priv(net_dev);
1872 netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
1873 raw_smp_processor_id());
1875 rc = efx_check_disabled(efx);
1878 if (efx->phy_mode & PHY_MODE_SPECIAL)
1880 if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
1883 /* Notify the kernel of the link state polled during driver load,
1884 * before the monitor starts running */
1885 efx_link_status_changed(efx);
1888 efx_selftest_async_start(efx);
1892 /* Context: process, rtnl_lock() held.
1893 * Note that the kernel will ignore our return code; this method
1894 * should really be a void.
1896 static int efx_net_stop(struct net_device *net_dev)
1898 struct efx_nic *efx = netdev_priv(net_dev);
1900 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
1901 raw_smp_processor_id());
1903 /* Stop the device and flush all the channels */
1909 /* Context: process, dev_base_lock or RTNL held, non-blocking. */
1910 static struct rtnl_link_stats64 *efx_net_stats(struct net_device *net_dev,
1911 struct rtnl_link_stats64 *stats)
1913 struct efx_nic *efx = netdev_priv(net_dev);
1914 struct efx_mac_stats *mac_stats = &efx->mac_stats;
1916 spin_lock_bh(&efx->stats_lock);
1918 efx->type->update_stats(efx);
1920 stats->rx_packets = mac_stats->rx_packets;
1921 stats->tx_packets = mac_stats->tx_packets;
1922 stats->rx_bytes = mac_stats->rx_bytes;
1923 stats->tx_bytes = mac_stats->tx_bytes;
1924 stats->rx_dropped = efx->n_rx_nodesc_drop_cnt;
1925 stats->multicast = mac_stats->rx_multicast;
1926 stats->collisions = mac_stats->tx_collision;
1927 stats->rx_length_errors = (mac_stats->rx_gtjumbo +
1928 mac_stats->rx_length_error);
1929 stats->rx_crc_errors = mac_stats->rx_bad;
1930 stats->rx_frame_errors = mac_stats->rx_align_error;
1931 stats->rx_fifo_errors = mac_stats->rx_overflow;
1932 stats->rx_missed_errors = mac_stats->rx_missed;
1933 stats->tx_window_errors = mac_stats->tx_late_collision;
1935 stats->rx_errors = (stats->rx_length_errors +
1936 stats->rx_crc_errors +
1937 stats->rx_frame_errors +
1938 mac_stats->rx_symbol_error);
1939 stats->tx_errors = (stats->tx_window_errors +
1942 spin_unlock_bh(&efx->stats_lock);
1947 /* Context: netif_tx_lock held, BHs disabled. */
1948 static void efx_watchdog(struct net_device *net_dev)
1950 struct efx_nic *efx = netdev_priv(net_dev);
1952 netif_err(efx, tx_err, efx->net_dev,
1953 "TX stuck with port_enabled=%d: resetting channels\n",
1956 efx_schedule_reset(efx, RESET_TYPE_TX_WATCHDOG);
1960 /* Context: process, rtnl_lock() held. */
1961 static int efx_change_mtu(struct net_device *net_dev, int new_mtu)
1963 struct efx_nic *efx = netdev_priv(net_dev);
1966 rc = efx_check_disabled(efx);
1969 if (new_mtu > EFX_MAX_MTU)
1972 netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu);
1974 efx_device_detach_sync(efx);
1977 mutex_lock(&efx->mac_lock);
1978 net_dev->mtu = new_mtu;
1979 efx->type->reconfigure_mac(efx);
1980 mutex_unlock(&efx->mac_lock);
1983 netif_device_attach(efx->net_dev);
1987 static int efx_set_mac_address(struct net_device *net_dev, void *data)
1989 struct efx_nic *efx = netdev_priv(net_dev);
1990 struct sockaddr *addr = data;
1991 char *new_addr = addr->sa_data;
1993 if (!is_valid_ether_addr(new_addr)) {
1994 netif_err(efx, drv, efx->net_dev,
1995 "invalid ethernet MAC address requested: %pM\n",
1997 return -EADDRNOTAVAIL;
2000 memcpy(net_dev->dev_addr, new_addr, net_dev->addr_len);
2001 efx_sriov_mac_address_changed(efx);
2003 /* Reconfigure the MAC */
2004 mutex_lock(&efx->mac_lock);
2005 efx->type->reconfigure_mac(efx);
2006 mutex_unlock(&efx->mac_lock);
2011 /* Context: netif_addr_lock held, BHs disabled. */
2012 static void efx_set_rx_mode(struct net_device *net_dev)
2014 struct efx_nic *efx = netdev_priv(net_dev);
2015 struct netdev_hw_addr *ha;
2016 union efx_multicast_hash *mc_hash = &efx->multicast_hash;
2020 efx->promiscuous = !!(net_dev->flags & IFF_PROMISC);
2022 /* Build multicast hash table */
2023 if (efx->promiscuous || (net_dev->flags & IFF_ALLMULTI)) {
2024 memset(mc_hash, 0xff, sizeof(*mc_hash));
2026 memset(mc_hash, 0x00, sizeof(*mc_hash));
2027 netdev_for_each_mc_addr(ha, net_dev) {
2028 crc = ether_crc_le(ETH_ALEN, ha->addr);
2029 bit = crc & (EFX_MCAST_HASH_ENTRIES - 1);
2030 __set_bit_le(bit, mc_hash);
2033 /* Broadcast packets go through the multicast hash filter.
2034 * ether_crc_le() of the broadcast address is 0xbe2612ff
2035 * so we always add bit 0xff to the mask.
2037 __set_bit_le(0xff, mc_hash);
2040 if (efx->port_enabled)
2041 queue_work(efx->workqueue, &efx->mac_work);
2042 /* Otherwise efx_start_port() will do this */
2045 static int efx_set_features(struct net_device *net_dev, netdev_features_t data)
2047 struct efx_nic *efx = netdev_priv(net_dev);
2049 /* If disabling RX n-tuple filtering, clear existing filters */
2050 if (net_dev->features & ~data & NETIF_F_NTUPLE)
2051 efx_filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL);
2056 static const struct net_device_ops efx_netdev_ops = {
2057 .ndo_open = efx_net_open,
2058 .ndo_stop = efx_net_stop,
2059 .ndo_get_stats64 = efx_net_stats,
2060 .ndo_tx_timeout = efx_watchdog,
2061 .ndo_start_xmit = efx_hard_start_xmit,
2062 .ndo_validate_addr = eth_validate_addr,
2063 .ndo_do_ioctl = efx_ioctl,
2064 .ndo_change_mtu = efx_change_mtu,
2065 .ndo_set_mac_address = efx_set_mac_address,
2066 .ndo_set_rx_mode = efx_set_rx_mode,
2067 .ndo_set_features = efx_set_features,
2068 #ifdef CONFIG_SFC_SRIOV
2069 .ndo_set_vf_mac = efx_sriov_set_vf_mac,
2070 .ndo_set_vf_vlan = efx_sriov_set_vf_vlan,
2071 .ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk,
2072 .ndo_get_vf_config = efx_sriov_get_vf_config,
2074 #ifdef CONFIG_NET_POLL_CONTROLLER
2075 .ndo_poll_controller = efx_netpoll,
2077 .ndo_setup_tc = efx_setup_tc,
2078 #ifdef CONFIG_RFS_ACCEL
2079 .ndo_rx_flow_steer = efx_filter_rfs,
2083 static void efx_update_name(struct efx_nic *efx)
2085 strcpy(efx->name, efx->net_dev->name);
2086 efx_mtd_rename(efx);
2087 efx_set_channel_names(efx);
2090 static int efx_netdev_event(struct notifier_block *this,
2091 unsigned long event, void *ptr)
2093 struct net_device *net_dev = ptr;
2095 if (net_dev->netdev_ops == &efx_netdev_ops &&
2096 event == NETDEV_CHANGENAME)
2097 efx_update_name(netdev_priv(net_dev));
2102 static struct notifier_block efx_netdev_notifier = {
2103 .notifier_call = efx_netdev_event,
2107 show_phy_type(struct device *dev, struct device_attribute *attr, char *buf)
2109 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2110 return sprintf(buf, "%d\n", efx->phy_type);
2112 static DEVICE_ATTR(phy_type, 0644, show_phy_type, NULL);
2114 static int efx_register_netdev(struct efx_nic *efx)
2116 struct net_device *net_dev = efx->net_dev;
2117 struct efx_channel *channel;
2120 net_dev->watchdog_timeo = 5 * HZ;
2121 net_dev->irq = efx->pci_dev->irq;
2122 net_dev->netdev_ops = &efx_netdev_ops;
2123 SET_ETHTOOL_OPS(net_dev, &efx_ethtool_ops);
2124 net_dev->gso_max_segs = EFX_TSO_MAX_SEGS;
2128 /* Enable resets to be scheduled and check whether any were
2129 * already requested. If so, the NIC is probably hosed so we
2132 efx->state = STATE_READY;
2133 smp_mb(); /* ensure we change state before checking reset_pending */
2134 if (efx->reset_pending) {
2135 netif_err(efx, probe, efx->net_dev,
2136 "aborting probe due to scheduled reset\n");
2141 rc = dev_alloc_name(net_dev, net_dev->name);
2144 efx_update_name(efx);
2146 /* Always start with carrier off; PHY events will detect the link */
2147 netif_carrier_off(net_dev);
2149 rc = register_netdevice(net_dev);
2153 efx_for_each_channel(channel, efx) {
2154 struct efx_tx_queue *tx_queue;
2155 efx_for_each_channel_tx_queue(tx_queue, channel)
2156 efx_init_tx_queue_core_txq(tx_queue);
2161 rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
2163 netif_err(efx, drv, efx->net_dev,
2164 "failed to init net dev attributes\n");
2165 goto fail_registered;
2172 unregister_netdevice(net_dev);
2174 efx->state = STATE_UNINIT;
2176 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
2180 static void efx_unregister_netdev(struct efx_nic *efx)
2182 struct efx_channel *channel;
2183 struct efx_tx_queue *tx_queue;
2188 BUG_ON(netdev_priv(efx->net_dev) != efx);
2190 /* Free up any skbs still remaining. This has to happen before
2191 * we try to unregister the netdev as running their destructors
2192 * may be needed to get the device ref. count to 0. */
2193 efx_for_each_channel(channel, efx) {
2194 efx_for_each_channel_tx_queue(tx_queue, channel)
2195 efx_release_tx_buffers(tx_queue);
2198 strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
2199 device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
2202 unregister_netdevice(efx->net_dev);
2203 efx->state = STATE_UNINIT;
2207 /**************************************************************************
2209 * Device reset and suspend
2211 **************************************************************************/
2213 /* Tears down the entire software state and most of the hardware state
2215 void efx_reset_down(struct efx_nic *efx, enum reset_type method)
2217 EFX_ASSERT_RESET_SERIALISED(efx);
2220 efx_stop_interrupts(efx, false);
2222 mutex_lock(&efx->mac_lock);
2223 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE)
2224 efx->phy_op->fini(efx);
2225 efx->type->fini(efx);
2228 /* This function will always ensure that the locks acquired in
2229 * efx_reset_down() are released. A failure return code indicates
2230 * that we were unable to reinitialise the hardware, and the
2231 * driver should be disabled. If ok is false, then the rx and tx
2232 * engines are not restarted, pending a RESET_DISABLE. */
2233 int efx_reset_up(struct efx_nic *efx, enum reset_type method, bool ok)
2237 EFX_ASSERT_RESET_SERIALISED(efx);
2239 rc = efx->type->init(efx);
2241 netif_err(efx, drv, efx->net_dev, "failed to initialise NIC\n");
2248 if (efx->port_initialized && method != RESET_TYPE_INVISIBLE) {
2249 rc = efx->phy_op->init(efx);
2252 if (efx->phy_op->reconfigure(efx))
2253 netif_err(efx, drv, efx->net_dev,
2254 "could not restore PHY settings\n");
2257 efx->type->reconfigure_mac(efx);
2259 efx_start_interrupts(efx, false);
2260 efx_restore_filters(efx);
2261 efx_sriov_reset(efx);
2263 mutex_unlock(&efx->mac_lock);
2270 efx->port_initialized = false;
2272 mutex_unlock(&efx->mac_lock);
2277 /* Reset the NIC using the specified method. Note that the reset may
2278 * fail, in which case the card will be left in an unusable state.
2280 * Caller must hold the rtnl_lock.
2282 int efx_reset(struct efx_nic *efx, enum reset_type method)
2287 netif_info(efx, drv, efx->net_dev, "resetting (%s)\n",
2288 RESET_TYPE(method));
2290 efx_device_detach_sync(efx);
2291 efx_reset_down(efx, method);
2293 rc = efx->type->reset(efx, method);
2295 netif_err(efx, drv, efx->net_dev, "failed to reset hardware\n");
2299 /* Clear flags for the scopes we covered. We assume the NIC and
2300 * driver are now quiescent so that there is no race here.
2302 efx->reset_pending &= -(1 << (method + 1));
2304 /* Reinitialise bus-mastering, which may have been turned off before
2305 * the reset was scheduled. This is still appropriate, even in the
2306 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
2307 * can respond to requests. */
2308 pci_set_master(efx->pci_dev);
2311 /* Leave device stopped if necessary */
2312 disabled = rc || method == RESET_TYPE_DISABLE;
2313 rc2 = efx_reset_up(efx, method, !disabled);
2321 dev_close(efx->net_dev);
2322 netif_err(efx, drv, efx->net_dev, "has been disabled\n");
2323 efx->state = STATE_DISABLED;
2325 netif_dbg(efx, drv, efx->net_dev, "reset complete\n");
2326 netif_device_attach(efx->net_dev);
2331 /* The worker thread exists so that code that cannot sleep can
2332 * schedule a reset for later.
2334 static void efx_reset_work(struct work_struct *data)
2336 struct efx_nic *efx = container_of(data, struct efx_nic, reset_work);
2337 unsigned long pending = ACCESS_ONCE(efx->reset_pending);
2344 /* We checked the state in efx_schedule_reset() but it may
2345 * have changed by now. Now that we have the RTNL lock,
2346 * it cannot change again.
2348 if (efx->state == STATE_READY)
2349 (void)efx_reset(efx, fls(pending) - 1);
2354 void efx_schedule_reset(struct efx_nic *efx, enum reset_type type)
2356 enum reset_type method;
2359 case RESET_TYPE_INVISIBLE:
2360 case RESET_TYPE_ALL:
2361 case RESET_TYPE_WORLD:
2362 case RESET_TYPE_DISABLE:
2364 netif_dbg(efx, drv, efx->net_dev, "scheduling %s reset\n",
2365 RESET_TYPE(method));
2368 method = efx->type->map_reset_reason(type);
2369 netif_dbg(efx, drv, efx->net_dev,
2370 "scheduling %s reset for %s\n",
2371 RESET_TYPE(method), RESET_TYPE(type));
2375 set_bit(method, &efx->reset_pending);
2376 smp_mb(); /* ensure we change reset_pending before checking state */
2378 /* If we're not READY then just leave the flags set as the cue
2379 * to abort probing or reschedule the reset later.
2381 if (ACCESS_ONCE(efx->state) != STATE_READY)
2384 /* efx_process_channel() will no longer read events once a
2385 * reset is scheduled. So switch back to poll'd MCDI completions. */
2386 efx_mcdi_mode_poll(efx);
2388 queue_work(reset_workqueue, &efx->reset_work);
2391 /**************************************************************************
2393 * List of NICs we support
2395 **************************************************************************/
2397 /* PCI device ID table */
2398 static DEFINE_PCI_DEVICE_TABLE(efx_pci_table) = {
2399 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE,
2400 PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0),
2401 .driver_data = (unsigned long) &falcon_a1_nic_type},
2402 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE,
2403 PCI_DEVICE_ID_SOLARFLARE_SFC4000B),
2404 .driver_data = (unsigned long) &falcon_b0_nic_type},
2405 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */
2406 .driver_data = (unsigned long) &siena_a0_nic_type},
2407 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */
2408 .driver_data = (unsigned long) &siena_a0_nic_type},
2409 {0} /* end of list */
2412 /**************************************************************************
2414 * Dummy PHY/MAC operations
2416 * Can be used for some unimplemented operations
2417 * Needed so all function pointers are valid and do not have to be tested
2420 **************************************************************************/
2421 int efx_port_dummy_op_int(struct efx_nic *efx)
2425 void efx_port_dummy_op_void(struct efx_nic *efx) {}
2427 static bool efx_port_dummy_op_poll(struct efx_nic *efx)
2432 static const struct efx_phy_operations efx_dummy_phy_operations = {
2433 .init = efx_port_dummy_op_int,
2434 .reconfigure = efx_port_dummy_op_int,
2435 .poll = efx_port_dummy_op_poll,
2436 .fini = efx_port_dummy_op_void,
2439 /**************************************************************************
2443 **************************************************************************/
2445 /* This zeroes out and then fills in the invariants in a struct
2446 * efx_nic (including all sub-structures).
2448 static int efx_init_struct(struct efx_nic *efx,
2449 struct pci_dev *pci_dev, struct net_device *net_dev)
2453 /* Initialise common structures */
2454 spin_lock_init(&efx->biu_lock);
2455 #ifdef CONFIG_SFC_MTD
2456 INIT_LIST_HEAD(&efx->mtd_list);
2458 INIT_WORK(&efx->reset_work, efx_reset_work);
2459 INIT_DELAYED_WORK(&efx->monitor_work, efx_monitor);
2460 INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work);
2461 efx->pci_dev = pci_dev;
2462 efx->msg_enable = debug;
2463 efx->state = STATE_UNINIT;
2464 strlcpy(efx->name, pci_name(pci_dev), sizeof(efx->name));
2466 efx->net_dev = net_dev;
2467 spin_lock_init(&efx->stats_lock);
2468 mutex_init(&efx->mac_lock);
2469 efx->phy_op = &efx_dummy_phy_operations;
2470 efx->mdio.dev = net_dev;
2471 INIT_WORK(&efx->mac_work, efx_mac_work);
2472 init_waitqueue_head(&efx->flush_wq);
2474 for (i = 0; i < EFX_MAX_CHANNELS; i++) {
2475 efx->channel[i] = efx_alloc_channel(efx, i, NULL);
2476 if (!efx->channel[i])
2480 EFX_BUG_ON_PARANOID(efx->type->phys_addr_channels > EFX_MAX_CHANNELS);
2482 /* Higher numbered interrupt modes are less capable! */
2483 efx->interrupt_mode = max(efx->type->max_interrupt_mode,
2486 /* Would be good to use the net_dev name, but we're too early */
2487 snprintf(efx->workqueue_name, sizeof(efx->workqueue_name), "sfc%s",
2489 efx->workqueue = create_singlethread_workqueue(efx->workqueue_name);
2490 if (!efx->workqueue)
2496 efx_fini_struct(efx);
2500 static void efx_fini_struct(struct efx_nic *efx)
2504 for (i = 0; i < EFX_MAX_CHANNELS; i++)
2505 kfree(efx->channel[i]);
2507 if (efx->workqueue) {
2508 destroy_workqueue(efx->workqueue);
2509 efx->workqueue = NULL;
2513 /**************************************************************************
2517 **************************************************************************/
2519 /* Main body of final NIC shutdown code
2520 * This is called only at module unload (or hotplug removal).
2522 static void efx_pci_remove_main(struct efx_nic *efx)
2524 /* Flush reset_work. It can no longer be scheduled since we
2527 BUG_ON(efx->state == STATE_READY);
2528 cancel_work_sync(&efx->reset_work);
2530 #ifdef CONFIG_RFS_ACCEL
2531 free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap);
2532 efx->net_dev->rx_cpu_rmap = NULL;
2534 efx_stop_interrupts(efx, false);
2535 efx_nic_fini_interrupt(efx);
2537 efx->type->fini(efx);
2539 efx_remove_all(efx);
2542 /* Final NIC shutdown
2543 * This is called only at module unload (or hotplug removal).
2545 static void efx_pci_remove(struct pci_dev *pci_dev)
2547 struct efx_nic *efx;
2549 efx = pci_get_drvdata(pci_dev);
2553 /* Mark the NIC as fini, then stop the interface */
2555 dev_close(efx->net_dev);
2556 efx_stop_interrupts(efx, false);
2559 efx_sriov_fini(efx);
2560 efx_unregister_netdev(efx);
2562 efx_mtd_remove(efx);
2564 efx_pci_remove_main(efx);
2567 netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
2569 efx_fini_struct(efx);
2570 pci_set_drvdata(pci_dev, NULL);
2571 free_netdev(efx->net_dev);
2574 /* NIC VPD information
2575 * Called during probe to display the part number of the
2576 * installed NIC. VPD is potentially very large but this should
2577 * always appear within the first 512 bytes.
2579 #define SFC_VPD_LEN 512
2580 static void efx_print_product_vpd(struct efx_nic *efx)
2582 struct pci_dev *dev = efx->pci_dev;
2583 char vpd_data[SFC_VPD_LEN];
2587 /* Get the vpd data from the device */
2588 vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data);
2589 if (vpd_size <= 0) {
2590 netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n");
2594 /* Get the Read only section */
2595 i = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA);
2597 netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n");
2601 j = pci_vpd_lrdt_size(&vpd_data[i]);
2602 i += PCI_VPD_LRDT_TAG_SIZE;
2603 if (i + j > vpd_size)
2606 /* Get the Part number */
2607 i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN");
2609 netif_err(efx, drv, efx->net_dev, "Part number not found\n");
2613 j = pci_vpd_info_field_size(&vpd_data[i]);
2614 i += PCI_VPD_INFO_FLD_HDR_SIZE;
2615 if (i + j > vpd_size) {
2616 netif_err(efx, drv, efx->net_dev, "Incomplete part number\n");
2620 netif_info(efx, drv, efx->net_dev,
2621 "Part Number : %.*s\n", j, &vpd_data[i]);
2625 /* Main body of NIC initialisation
2626 * This is called at module load (or hotplug insertion, theoretically).
2628 static int efx_pci_probe_main(struct efx_nic *efx)
2632 /* Do start-of-day initialisation */
2633 rc = efx_probe_all(efx);
2639 rc = efx->type->init(efx);
2641 netif_err(efx, probe, efx->net_dev,
2642 "failed to initialise NIC\n");
2646 rc = efx_init_port(efx);
2648 netif_err(efx, probe, efx->net_dev,
2649 "failed to initialise port\n");
2653 rc = efx_nic_init_interrupt(efx);
2656 efx_start_interrupts(efx, false);
2663 efx->type->fini(efx);
2666 efx_remove_all(efx);
2671 /* NIC initialisation
2673 * This is called at module load (or hotplug insertion,
2674 * theoretically). It sets up PCI mappings, resets the NIC,
2675 * sets up and registers the network devices with the kernel and hooks
2676 * the interrupt service routine. It does not prepare the device for
2677 * transmission; this is left to the first time one of the network
2678 * interfaces is brought up (i.e. efx_net_open).
2680 static int efx_pci_probe(struct pci_dev *pci_dev,
2681 const struct pci_device_id *entry)
2683 struct net_device *net_dev;
2684 struct efx_nic *efx;
2687 /* Allocate and initialise a struct net_device and struct efx_nic */
2688 net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES,
2692 efx = netdev_priv(net_dev);
2693 efx->type = (const struct efx_nic_type *) entry->driver_data;
2694 net_dev->features |= (efx->type->offload_features | NETIF_F_SG |
2695 NETIF_F_HIGHDMA | NETIF_F_TSO |
2697 if (efx->type->offload_features & NETIF_F_V6_CSUM)
2698 net_dev->features |= NETIF_F_TSO6;
2699 /* Mask for features that also apply to VLAN devices */
2700 net_dev->vlan_features |= (NETIF_F_ALL_CSUM | NETIF_F_SG |
2701 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |
2703 /* All offloads can be toggled */
2704 net_dev->hw_features = net_dev->features & ~NETIF_F_HIGHDMA;
2705 pci_set_drvdata(pci_dev, efx);
2706 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
2707 rc = efx_init_struct(efx, pci_dev, net_dev);
2711 netif_info(efx, probe, efx->net_dev,
2712 "Solarflare NIC detected\n");
2714 efx_print_product_vpd(efx);
2716 /* Set up basic I/O (BAR mappings etc) */
2717 rc = efx_init_io(efx);
2721 rc = efx_pci_probe_main(efx);
2725 rc = efx_register_netdev(efx);
2729 rc = efx_sriov_init(efx);
2731 netif_err(efx, probe, efx->net_dev,
2732 "SR-IOV can't be enabled rc %d\n", rc);
2734 netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
2736 /* Try to create MTDs, but allow this to fail */
2738 rc = efx_mtd_probe(efx);
2741 netif_warn(efx, probe, efx->net_dev,
2742 "failed to create MTDs (%d)\n", rc);
2747 efx_pci_remove_main(efx);
2751 efx_fini_struct(efx);
2753 pci_set_drvdata(pci_dev, NULL);
2755 netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
2756 free_netdev(net_dev);
2760 static int efx_pm_freeze(struct device *dev)
2762 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2766 if (efx->state != STATE_DISABLED) {
2767 efx->state = STATE_UNINIT;
2769 efx_device_detach_sync(efx);
2772 efx_stop_interrupts(efx, false);
2780 static int efx_pm_thaw(struct device *dev)
2782 struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
2786 if (efx->state != STATE_DISABLED) {
2787 efx_start_interrupts(efx, false);
2789 mutex_lock(&efx->mac_lock);
2790 efx->phy_op->reconfigure(efx);
2791 mutex_unlock(&efx->mac_lock);
2795 netif_device_attach(efx->net_dev);
2797 efx->state = STATE_READY;
2799 efx->type->resume_wol(efx);
2804 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
2805 queue_work(reset_workqueue, &efx->reset_work);
2810 static int efx_pm_poweroff(struct device *dev)
2812 struct pci_dev *pci_dev = to_pci_dev(dev);
2813 struct efx_nic *efx = pci_get_drvdata(pci_dev);
2815 efx->type->fini(efx);
2817 efx->reset_pending = 0;
2819 pci_save_state(pci_dev);
2820 return pci_set_power_state(pci_dev, PCI_D3hot);
2823 /* Used for both resume and restore */
2824 static int efx_pm_resume(struct device *dev)
2826 struct pci_dev *pci_dev = to_pci_dev(dev);
2827 struct efx_nic *efx = pci_get_drvdata(pci_dev);
2830 rc = pci_set_power_state(pci_dev, PCI_D0);
2833 pci_restore_state(pci_dev);
2834 rc = pci_enable_device(pci_dev);
2837 pci_set_master(efx->pci_dev);
2838 rc = efx->type->reset(efx, RESET_TYPE_ALL);
2841 rc = efx->type->init(efx);
2848 static int efx_pm_suspend(struct device *dev)
2853 rc = efx_pm_poweroff(dev);
2859 static const struct dev_pm_ops efx_pm_ops = {
2860 .suspend = efx_pm_suspend,
2861 .resume = efx_pm_resume,
2862 .freeze = efx_pm_freeze,
2863 .thaw = efx_pm_thaw,
2864 .poweroff = efx_pm_poweroff,
2865 .restore = efx_pm_resume,
2868 static struct pci_driver efx_pci_driver = {
2869 .name = KBUILD_MODNAME,
2870 .id_table = efx_pci_table,
2871 .probe = efx_pci_probe,
2872 .remove = efx_pci_remove,
2873 .driver.pm = &efx_pm_ops,
2876 /**************************************************************************
2878 * Kernel module interface
2880 *************************************************************************/
2882 module_param(interrupt_mode, uint, 0444);
2883 MODULE_PARM_DESC(interrupt_mode,
2884 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
2886 static int __init efx_init_module(void)
2890 printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n");
2892 rc = register_netdevice_notifier(&efx_netdev_notifier);
2896 rc = efx_init_sriov();
2900 reset_workqueue = create_singlethread_workqueue("sfc_reset");
2901 if (!reset_workqueue) {
2906 rc = pci_register_driver(&efx_pci_driver);
2913 destroy_workqueue(reset_workqueue);
2917 unregister_netdevice_notifier(&efx_netdev_notifier);
2922 static void __exit efx_exit_module(void)
2924 printk(KERN_INFO "Solarflare NET driver unloading\n");
2926 pci_unregister_driver(&efx_pci_driver);
2927 destroy_workqueue(reset_workqueue);
2929 unregister_netdevice_notifier(&efx_netdev_notifier);
2933 module_init(efx_init_module);
2934 module_exit(efx_exit_module);
2936 MODULE_AUTHOR("Solarflare Communications and "
2937 "Michael Brown <mbrown@fensystems.co.uk>");
2938 MODULE_DESCRIPTION("Solarflare Communications network driver");
2939 MODULE_LICENSE("GPL");
2940 MODULE_DEVICE_TABLE(pci, efx_pci_table);