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 unsigned int separate_tx_channels
;
110 module_param(separate_tx_channels
, uint
, 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 int phy_flash_cfg
;
164 module_param(phy_flash_cfg
, int, 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_RUNNING) || \
206 (efx->state == STATE_DISABLED)) \
210 /**************************************************************************
212 * Event queue processing
214 *************************************************************************/
216 /* Process channel's event queue
218 * This function is responsible for processing the event queue of a
219 * single channel. The caller must guarantee that this function will
220 * never be concurrently called more than once on the same channel,
221 * though different channels may be being processed concurrently.
223 static int efx_process_channel(struct efx_channel
*channel
, int budget
)
227 if (unlikely(!channel
->enabled
))
230 spent
= efx_nic_process_eventq(channel
, budget
);
231 if (spent
&& efx_channel_has_rx_queue(channel
)) {
232 struct efx_rx_queue
*rx_queue
=
233 efx_channel_get_rx_queue(channel
);
235 /* Deliver last RX packet. */
236 if (channel
->rx_pkt
) {
237 __efx_rx_packet(channel
, channel
->rx_pkt
);
238 channel
->rx_pkt
= NULL
;
240 if (rx_queue
->enabled
) {
241 efx_rx_strategy(channel
);
242 efx_fast_push_rx_descriptors(rx_queue
);
249 /* Mark channel as finished processing
251 * Note that since we will not receive further interrupts for this
252 * channel before we finish processing and call the eventq_read_ack()
253 * method, there is no need to use the interrupt hold-off timers.
255 static inline void efx_channel_processed(struct efx_channel
*channel
)
257 /* The interrupt handler for this channel may set work_pending
258 * as soon as we acknowledge the events we've seen. Make sure
259 * it's cleared before then. */
260 channel
->work_pending
= false;
263 efx_nic_eventq_read_ack(channel
);
268 * NAPI guarantees serialisation of polls of the same device, which
269 * provides the guarantee required by efx_process_channel().
271 static int efx_poll(struct napi_struct
*napi
, int budget
)
273 struct efx_channel
*channel
=
274 container_of(napi
, struct efx_channel
, napi_str
);
275 struct efx_nic
*efx
= channel
->efx
;
278 netif_vdbg(efx
, intr
, efx
->net_dev
,
279 "channel %d NAPI poll executing on CPU %d\n",
280 channel
->channel
, raw_smp_processor_id());
282 spent
= efx_process_channel(channel
, budget
);
284 if (spent
< budget
) {
285 if (efx_channel_has_rx_queue(channel
) &&
286 efx
->irq_rx_adaptive
&&
287 unlikely(++channel
->irq_count
== 1000)) {
288 if (unlikely(channel
->irq_mod_score
<
289 irq_adapt_low_thresh
)) {
290 if (channel
->irq_moderation
> 1) {
291 channel
->irq_moderation
-= 1;
292 efx
->type
->push_irq_moderation(channel
);
294 } else if (unlikely(channel
->irq_mod_score
>
295 irq_adapt_high_thresh
)) {
296 if (channel
->irq_moderation
<
297 efx
->irq_rx_moderation
) {
298 channel
->irq_moderation
+= 1;
299 efx
->type
->push_irq_moderation(channel
);
302 channel
->irq_count
= 0;
303 channel
->irq_mod_score
= 0;
306 efx_filter_rfs_expire(channel
);
308 /* There is no race here; although napi_disable() will
309 * only wait for napi_complete(), this isn't a problem
310 * since efx_channel_processed() will have no effect if
311 * interrupts have already been disabled.
314 efx_channel_processed(channel
);
320 /* Process the eventq of the specified channel immediately on this CPU
322 * Disable hardware generated interrupts, wait for any existing
323 * processing to finish, then directly poll (and ack ) the eventq.
324 * Finally reenable NAPI and interrupts.
326 * This is for use only during a loopback self-test. It must not
327 * deliver any packets up the stack as this can result in deadlock.
329 void efx_process_channel_now(struct efx_channel
*channel
)
331 struct efx_nic
*efx
= channel
->efx
;
333 BUG_ON(channel
->channel
>= efx
->n_channels
);
334 BUG_ON(!channel
->enabled
);
335 BUG_ON(!efx
->loopback_selftest
);
337 /* Disable interrupts and wait for ISRs to complete */
338 efx_nic_disable_interrupts(efx
);
339 if (efx
->legacy_irq
) {
340 synchronize_irq(efx
->legacy_irq
);
341 efx
->legacy_irq_enabled
= false;
344 synchronize_irq(channel
->irq
);
346 /* Wait for any NAPI processing to complete */
347 napi_disable(&channel
->napi_str
);
349 /* Poll the channel */
350 efx_process_channel(channel
, channel
->eventq_mask
+ 1);
352 /* Ack the eventq. This may cause an interrupt to be generated
353 * when they are reenabled */
354 efx_channel_processed(channel
);
356 napi_enable(&channel
->napi_str
);
358 efx
->legacy_irq_enabled
= true;
359 efx_nic_enable_interrupts(efx
);
362 /* Create event queue
363 * Event queue memory allocations are done only once. If the channel
364 * is reset, the memory buffer will be reused; this guards against
365 * errors during channel reset and also simplifies interrupt handling.
367 static int efx_probe_eventq(struct efx_channel
*channel
)
369 struct efx_nic
*efx
= channel
->efx
;
370 unsigned long entries
;
372 netif_dbg(efx
, probe
, efx
->net_dev
,
373 "chan %d create event queue\n", channel
->channel
);
375 /* Build an event queue with room for one event per tx and rx buffer,
376 * plus some extra for link state events and MCDI completions. */
377 entries
= roundup_pow_of_two(efx
->rxq_entries
+ efx
->txq_entries
+ 128);
378 EFX_BUG_ON_PARANOID(entries
> EFX_MAX_EVQ_SIZE
);
379 channel
->eventq_mask
= max(entries
, EFX_MIN_EVQ_SIZE
) - 1;
381 return efx_nic_probe_eventq(channel
);
384 /* Prepare channel's event queue */
385 static void efx_init_eventq(struct efx_channel
*channel
)
387 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
388 "chan %d init event queue\n", channel
->channel
);
390 channel
->eventq_read_ptr
= 0;
392 efx_nic_init_eventq(channel
);
395 /* Enable event queue processing and NAPI */
396 static void efx_start_eventq(struct efx_channel
*channel
)
398 netif_dbg(channel
->efx
, ifup
, channel
->efx
->net_dev
,
399 "chan %d start event queue\n", channel
->channel
);
401 /* The interrupt handler for this channel may set work_pending
402 * as soon as we enable it. Make sure it's cleared before
403 * then. Similarly, make sure it sees the enabled flag set.
405 channel
->work_pending
= false;
406 channel
->enabled
= true;
409 napi_enable(&channel
->napi_str
);
410 efx_nic_eventq_read_ack(channel
);
413 /* Disable event queue processing and NAPI */
414 static void efx_stop_eventq(struct efx_channel
*channel
)
416 if (!channel
->enabled
)
419 napi_disable(&channel
->napi_str
);
420 channel
->enabled
= false;
423 static void efx_fini_eventq(struct efx_channel
*channel
)
425 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
426 "chan %d fini event queue\n", channel
->channel
);
428 efx_nic_fini_eventq(channel
);
431 static void efx_remove_eventq(struct efx_channel
*channel
)
433 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
434 "chan %d remove event queue\n", channel
->channel
);
436 efx_nic_remove_eventq(channel
);
439 /**************************************************************************
443 *************************************************************************/
445 /* Allocate and initialise a channel structure. */
446 static struct efx_channel
*
447 efx_alloc_channel(struct efx_nic
*efx
, int i
, struct efx_channel
*old_channel
)
449 struct efx_channel
*channel
;
450 struct efx_rx_queue
*rx_queue
;
451 struct efx_tx_queue
*tx_queue
;
454 channel
= kzalloc(sizeof(*channel
), GFP_KERNEL
);
459 channel
->channel
= i
;
460 channel
->type
= &efx_default_channel_type
;
462 for (j
= 0; j
< EFX_TXQ_TYPES
; j
++) {
463 tx_queue
= &channel
->tx_queue
[j
];
465 tx_queue
->queue
= i
* EFX_TXQ_TYPES
+ j
;
466 tx_queue
->channel
= channel
;
469 rx_queue
= &channel
->rx_queue
;
471 setup_timer(&rx_queue
->slow_fill
, efx_rx_slow_fill
,
472 (unsigned long)rx_queue
);
477 /* Allocate and initialise a channel structure, copying parameters
478 * (but not resources) from an old channel structure.
480 static struct efx_channel
*
481 efx_copy_channel(const struct efx_channel
*old_channel
)
483 struct efx_channel
*channel
;
484 struct efx_rx_queue
*rx_queue
;
485 struct efx_tx_queue
*tx_queue
;
488 channel
= kmalloc(sizeof(*channel
), GFP_KERNEL
);
492 *channel
= *old_channel
;
494 channel
->napi_dev
= NULL
;
495 memset(&channel
->eventq
, 0, sizeof(channel
->eventq
));
497 for (j
= 0; j
< EFX_TXQ_TYPES
; j
++) {
498 tx_queue
= &channel
->tx_queue
[j
];
499 if (tx_queue
->channel
)
500 tx_queue
->channel
= channel
;
501 tx_queue
->buffer
= NULL
;
502 memset(&tx_queue
->txd
, 0, sizeof(tx_queue
->txd
));
505 rx_queue
= &channel
->rx_queue
;
506 rx_queue
->buffer
= NULL
;
507 memset(&rx_queue
->rxd
, 0, sizeof(rx_queue
->rxd
));
508 setup_timer(&rx_queue
->slow_fill
, efx_rx_slow_fill
,
509 (unsigned long)rx_queue
);
514 static int efx_probe_channel(struct efx_channel
*channel
)
516 struct efx_tx_queue
*tx_queue
;
517 struct efx_rx_queue
*rx_queue
;
520 netif_dbg(channel
->efx
, probe
, channel
->efx
->net_dev
,
521 "creating channel %d\n", channel
->channel
);
523 rc
= channel
->type
->pre_probe(channel
);
527 rc
= efx_probe_eventq(channel
);
531 efx_for_each_channel_tx_queue(tx_queue
, channel
) {
532 rc
= efx_probe_tx_queue(tx_queue
);
537 efx_for_each_channel_rx_queue(rx_queue
, channel
) {
538 rc
= efx_probe_rx_queue(rx_queue
);
543 channel
->n_rx_frm_trunc
= 0;
548 efx_remove_channel(channel
);
553 efx_get_channel_name(struct efx_channel
*channel
, char *buf
, size_t len
)
555 struct efx_nic
*efx
= channel
->efx
;
559 number
= channel
->channel
;
560 if (efx
->tx_channel_offset
== 0) {
562 } else if (channel
->channel
< efx
->tx_channel_offset
) {
566 number
-= efx
->tx_channel_offset
;
568 snprintf(buf
, len
, "%s%s-%d", efx
->name
, type
, number
);
571 static void efx_set_channel_names(struct efx_nic
*efx
)
573 struct efx_channel
*channel
;
575 efx_for_each_channel(channel
, efx
)
576 channel
->type
->get_name(channel
,
577 efx
->channel_name
[channel
->channel
],
578 sizeof(efx
->channel_name
[0]));
581 static int efx_probe_channels(struct efx_nic
*efx
)
583 struct efx_channel
*channel
;
586 /* Restart special buffer allocation */
587 efx
->next_buffer_table
= 0;
589 /* Probe channels in reverse, so that any 'extra' channels
590 * use the start of the buffer table. This allows the traffic
591 * channels to be resized without moving them or wasting the
592 * entries before them.
594 efx_for_each_channel_rev(channel
, efx
) {
595 rc
= efx_probe_channel(channel
);
597 netif_err(efx
, probe
, efx
->net_dev
,
598 "failed to create channel %d\n",
603 efx_set_channel_names(efx
);
608 efx_remove_channels(efx
);
612 /* Channels are shutdown and reinitialised whilst the NIC is running
613 * to propagate configuration changes (mtu, checksum offload), or
614 * to clear hardware error conditions
616 static void efx_start_datapath(struct efx_nic
*efx
)
618 struct efx_tx_queue
*tx_queue
;
619 struct efx_rx_queue
*rx_queue
;
620 struct efx_channel
*channel
;
622 /* Calculate the rx buffer allocation parameters required to
623 * support the current MTU, including padding for header
624 * alignment and overruns.
626 efx
->rx_buffer_len
= (max(EFX_PAGE_IP_ALIGN
, NET_IP_ALIGN
) +
627 EFX_MAX_FRAME_LEN(efx
->net_dev
->mtu
) +
628 efx
->type
->rx_buffer_hash_size
+
629 efx
->type
->rx_buffer_padding
);
630 efx
->rx_buffer_order
= get_order(efx
->rx_buffer_len
+
631 sizeof(struct efx_rx_page_state
));
633 /* Initialise the channels */
634 efx_for_each_channel(channel
, efx
) {
635 efx_for_each_channel_tx_queue(tx_queue
, channel
)
636 efx_init_tx_queue(tx_queue
);
638 /* The rx buffer allocation strategy is MTU dependent */
639 efx_rx_strategy(channel
);
641 efx_for_each_channel_rx_queue(rx_queue
, channel
) {
642 efx_init_rx_queue(rx_queue
);
643 efx_nic_generate_fill_event(rx_queue
);
646 WARN_ON(channel
->rx_pkt
!= NULL
);
647 efx_rx_strategy(channel
);
650 if (netif_device_present(efx
->net_dev
))
651 netif_tx_wake_all_queues(efx
->net_dev
);
654 static void efx_stop_datapath(struct efx_nic
*efx
)
656 struct efx_channel
*channel
;
657 struct efx_tx_queue
*tx_queue
;
658 struct efx_rx_queue
*rx_queue
;
659 struct pci_dev
*dev
= efx
->pci_dev
;
662 EFX_ASSERT_RESET_SERIALISED(efx
);
663 BUG_ON(efx
->port_enabled
);
665 /* Only perform flush if dma is enabled */
666 if (dev
->is_busmaster
) {
667 rc
= efx_nic_flush_queues(efx
);
669 if (rc
&& EFX_WORKAROUND_7803(efx
)) {
670 /* Schedule a reset to recover from the flush failure. The
671 * descriptor caches reference memory we're about to free,
672 * but falcon_reconfigure_mac_wrapper() won't reconnect
673 * the MACs because of the pending reset. */
674 netif_err(efx
, drv
, efx
->net_dev
,
675 "Resetting to recover from flush failure\n");
676 efx_schedule_reset(efx
, RESET_TYPE_ALL
);
678 netif_err(efx
, drv
, efx
->net_dev
, "failed to flush queues\n");
680 netif_dbg(efx
, drv
, efx
->net_dev
,
681 "successfully flushed all queues\n");
685 efx_for_each_channel(channel
, efx
) {
686 /* RX packet processing is pipelined, so wait for the
687 * NAPI handler to complete. At least event queue 0
688 * might be kept active by non-data events, so don't
689 * use napi_synchronize() but actually disable NAPI
692 if (efx_channel_has_rx_queue(channel
)) {
693 efx_stop_eventq(channel
);
694 efx_start_eventq(channel
);
697 efx_for_each_channel_rx_queue(rx_queue
, channel
)
698 efx_fini_rx_queue(rx_queue
);
699 efx_for_each_possible_channel_tx_queue(tx_queue
, channel
)
700 efx_fini_tx_queue(tx_queue
);
704 static void efx_remove_channel(struct efx_channel
*channel
)
706 struct efx_tx_queue
*tx_queue
;
707 struct efx_rx_queue
*rx_queue
;
709 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
710 "destroy chan %d\n", channel
->channel
);
712 efx_for_each_channel_rx_queue(rx_queue
, channel
)
713 efx_remove_rx_queue(rx_queue
);
714 efx_for_each_possible_channel_tx_queue(tx_queue
, channel
)
715 efx_remove_tx_queue(tx_queue
);
716 efx_remove_eventq(channel
);
719 static void efx_remove_channels(struct efx_nic
*efx
)
721 struct efx_channel
*channel
;
723 efx_for_each_channel(channel
, efx
)
724 efx_remove_channel(channel
);
728 efx_realloc_channels(struct efx_nic
*efx
, u32 rxq_entries
, u32 txq_entries
)
730 struct efx_channel
*other_channel
[EFX_MAX_CHANNELS
], *channel
;
731 u32 old_rxq_entries
, old_txq_entries
;
732 unsigned i
, next_buffer_table
= 0;
735 /* Not all channels should be reallocated. We must avoid
736 * reallocating their buffer table entries.
738 efx_for_each_channel(channel
, efx
) {
739 struct efx_rx_queue
*rx_queue
;
740 struct efx_tx_queue
*tx_queue
;
742 if (channel
->type
->copy
)
744 next_buffer_table
= max(next_buffer_table
,
745 channel
->eventq
.index
+
746 channel
->eventq
.entries
);
747 efx_for_each_channel_rx_queue(rx_queue
, channel
)
748 next_buffer_table
= max(next_buffer_table
,
749 rx_queue
->rxd
.index
+
750 rx_queue
->rxd
.entries
);
751 efx_for_each_channel_tx_queue(tx_queue
, channel
)
752 next_buffer_table
= max(next_buffer_table
,
753 tx_queue
->txd
.index
+
754 tx_queue
->txd
.entries
);
758 efx_stop_interrupts(efx
, true);
760 /* Clone channels (where possible) */
761 memset(other_channel
, 0, sizeof(other_channel
));
762 for (i
= 0; i
< efx
->n_channels
; i
++) {
763 channel
= efx
->channel
[i
];
764 if (channel
->type
->copy
)
765 channel
= channel
->type
->copy(channel
);
770 other_channel
[i
] = channel
;
773 /* Swap entry counts and channel pointers */
774 old_rxq_entries
= efx
->rxq_entries
;
775 old_txq_entries
= efx
->txq_entries
;
776 efx
->rxq_entries
= rxq_entries
;
777 efx
->txq_entries
= txq_entries
;
778 for (i
= 0; i
< efx
->n_channels
; i
++) {
779 channel
= efx
->channel
[i
];
780 efx
->channel
[i
] = other_channel
[i
];
781 other_channel
[i
] = channel
;
784 /* Restart buffer table allocation */
785 efx
->next_buffer_table
= next_buffer_table
;
787 for (i
= 0; i
< efx
->n_channels
; i
++) {
788 channel
= efx
->channel
[i
];
789 if (!channel
->type
->copy
)
791 rc
= efx_probe_channel(channel
);
794 efx_init_napi_channel(efx
->channel
[i
]);
798 /* Destroy unused channel structures */
799 for (i
= 0; i
< efx
->n_channels
; i
++) {
800 channel
= other_channel
[i
];
801 if (channel
&& channel
->type
->copy
) {
802 efx_fini_napi_channel(channel
);
803 efx_remove_channel(channel
);
808 efx_start_interrupts(efx
, true);
814 efx
->rxq_entries
= old_rxq_entries
;
815 efx
->txq_entries
= old_txq_entries
;
816 for (i
= 0; i
< efx
->n_channels
; i
++) {
817 channel
= efx
->channel
[i
];
818 efx
->channel
[i
] = other_channel
[i
];
819 other_channel
[i
] = channel
;
824 void efx_schedule_slow_fill(struct efx_rx_queue
*rx_queue
)
826 mod_timer(&rx_queue
->slow_fill
, jiffies
+ msecs_to_jiffies(100));
829 static const struct efx_channel_type efx_default_channel_type
= {
830 .pre_probe
= efx_channel_dummy_op_int
,
831 .get_name
= efx_get_channel_name
,
832 .copy
= efx_copy_channel
,
833 .keep_eventq
= false,
836 int efx_channel_dummy_op_int(struct efx_channel
*channel
)
841 /**************************************************************************
845 **************************************************************************/
847 /* This ensures that the kernel is kept informed (via
848 * netif_carrier_on/off) of the link status, and also maintains the
849 * link status's stop on the port's TX queue.
851 void efx_link_status_changed(struct efx_nic
*efx
)
853 struct efx_link_state
*link_state
= &efx
->link_state
;
855 /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
856 * that no events are triggered between unregister_netdev() and the
857 * driver unloading. A more general condition is that NETDEV_CHANGE
858 * can only be generated between NETDEV_UP and NETDEV_DOWN */
859 if (!netif_running(efx
->net_dev
))
862 if (link_state
->up
!= netif_carrier_ok(efx
->net_dev
)) {
863 efx
->n_link_state_changes
++;
866 netif_carrier_on(efx
->net_dev
);
868 netif_carrier_off(efx
->net_dev
);
871 /* Status message for kernel log */
873 netif_info(efx
, link
, efx
->net_dev
,
874 "link up at %uMbps %s-duplex (MTU %d)%s\n",
875 link_state
->speed
, link_state
->fd
? "full" : "half",
877 (efx
->promiscuous
? " [PROMISC]" : ""));
879 netif_info(efx
, link
, efx
->net_dev
, "link down\n");
882 void efx_link_set_advertising(struct efx_nic
*efx
, u32 advertising
)
884 efx
->link_advertising
= advertising
;
886 if (advertising
& ADVERTISED_Pause
)
887 efx
->wanted_fc
|= (EFX_FC_TX
| EFX_FC_RX
);
889 efx
->wanted_fc
&= ~(EFX_FC_TX
| EFX_FC_RX
);
890 if (advertising
& ADVERTISED_Asym_Pause
)
891 efx
->wanted_fc
^= EFX_FC_TX
;
895 void efx_link_set_wanted_fc(struct efx_nic
*efx
, u8 wanted_fc
)
897 efx
->wanted_fc
= wanted_fc
;
898 if (efx
->link_advertising
) {
899 if (wanted_fc
& EFX_FC_RX
)
900 efx
->link_advertising
|= (ADVERTISED_Pause
|
901 ADVERTISED_Asym_Pause
);
903 efx
->link_advertising
&= ~(ADVERTISED_Pause
|
904 ADVERTISED_Asym_Pause
);
905 if (wanted_fc
& EFX_FC_TX
)
906 efx
->link_advertising
^= ADVERTISED_Asym_Pause
;
910 static void efx_fini_port(struct efx_nic
*efx
);
912 /* Push loopback/power/transmit disable settings to the PHY, and reconfigure
913 * the MAC appropriately. All other PHY configuration changes are pushed
914 * through phy_op->set_settings(), and pushed asynchronously to the MAC
915 * through efx_monitor().
917 * Callers must hold the mac_lock
919 int __efx_reconfigure_port(struct efx_nic
*efx
)
921 enum efx_phy_mode phy_mode
;
924 WARN_ON(!mutex_is_locked(&efx
->mac_lock
));
926 /* Serialise the promiscuous flag with efx_set_rx_mode. */
927 netif_addr_lock_bh(efx
->net_dev
);
928 netif_addr_unlock_bh(efx
->net_dev
);
930 /* Disable PHY transmit in mac level loopbacks */
931 phy_mode
= efx
->phy_mode
;
932 if (LOOPBACK_INTERNAL(efx
))
933 efx
->phy_mode
|= PHY_MODE_TX_DISABLED
;
935 efx
->phy_mode
&= ~PHY_MODE_TX_DISABLED
;
937 rc
= efx
->type
->reconfigure_port(efx
);
940 efx
->phy_mode
= phy_mode
;
945 /* Reinitialise the MAC to pick up new PHY settings, even if the port is
947 int efx_reconfigure_port(struct efx_nic
*efx
)
951 EFX_ASSERT_RESET_SERIALISED(efx
);
953 mutex_lock(&efx
->mac_lock
);
954 rc
= __efx_reconfigure_port(efx
);
955 mutex_unlock(&efx
->mac_lock
);
960 /* Asynchronous work item for changing MAC promiscuity and multicast
961 * hash. Avoid a drain/rx_ingress enable by reconfiguring the current
963 static void efx_mac_work(struct work_struct
*data
)
965 struct efx_nic
*efx
= container_of(data
, struct efx_nic
, mac_work
);
967 mutex_lock(&efx
->mac_lock
);
968 if (efx
->port_enabled
)
969 efx
->type
->reconfigure_mac(efx
);
970 mutex_unlock(&efx
->mac_lock
);
973 static int efx_probe_port(struct efx_nic
*efx
)
977 netif_dbg(efx
, probe
, efx
->net_dev
, "create port\n");
980 efx
->phy_mode
= PHY_MODE_SPECIAL
;
982 /* Connect up MAC/PHY operations table */
983 rc
= efx
->type
->probe_port(efx
);
987 /* Initialise MAC address to permanent address */
988 memcpy(efx
->net_dev
->dev_addr
, efx
->net_dev
->perm_addr
, ETH_ALEN
);
993 static int efx_init_port(struct efx_nic
*efx
)
997 netif_dbg(efx
, drv
, efx
->net_dev
, "init port\n");
999 mutex_lock(&efx
->mac_lock
);
1001 rc
= efx
->phy_op
->init(efx
);
1005 efx
->port_initialized
= true;
1007 /* Reconfigure the MAC before creating dma queues (required for
1008 * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */
1009 efx
->type
->reconfigure_mac(efx
);
1011 /* Ensure the PHY advertises the correct flow control settings */
1012 rc
= efx
->phy_op
->reconfigure(efx
);
1016 mutex_unlock(&efx
->mac_lock
);
1020 efx
->phy_op
->fini(efx
);
1022 mutex_unlock(&efx
->mac_lock
);
1026 static void efx_start_port(struct efx_nic
*efx
)
1028 netif_dbg(efx
, ifup
, efx
->net_dev
, "start port\n");
1029 BUG_ON(efx
->port_enabled
);
1031 mutex_lock(&efx
->mac_lock
);
1032 efx
->port_enabled
= true;
1034 /* efx_mac_work() might have been scheduled after efx_stop_port(),
1035 * and then cancelled by efx_flush_all() */
1036 efx
->type
->reconfigure_mac(efx
);
1038 mutex_unlock(&efx
->mac_lock
);
1041 /* Prevent efx_mac_work() and efx_monitor() from working */
1042 static void efx_stop_port(struct efx_nic
*efx
)
1044 netif_dbg(efx
, ifdown
, efx
->net_dev
, "stop port\n");
1046 mutex_lock(&efx
->mac_lock
);
1047 efx
->port_enabled
= false;
1048 mutex_unlock(&efx
->mac_lock
);
1050 /* Serialise against efx_set_multicast_list() */
1051 netif_addr_lock_bh(efx
->net_dev
);
1052 netif_addr_unlock_bh(efx
->net_dev
);
1055 static void efx_fini_port(struct efx_nic
*efx
)
1057 netif_dbg(efx
, drv
, efx
->net_dev
, "shut down port\n");
1059 if (!efx
->port_initialized
)
1062 efx
->phy_op
->fini(efx
);
1063 efx
->port_initialized
= false;
1065 efx
->link_state
.up
= false;
1066 efx_link_status_changed(efx
);
1069 static void efx_remove_port(struct efx_nic
*efx
)
1071 netif_dbg(efx
, drv
, efx
->net_dev
, "destroying port\n");
1073 efx
->type
->remove_port(efx
);
1076 /**************************************************************************
1080 **************************************************************************/
1082 /* This configures the PCI device to enable I/O and DMA. */
1083 static int efx_init_io(struct efx_nic
*efx
)
1085 struct pci_dev
*pci_dev
= efx
->pci_dev
;
1086 dma_addr_t dma_mask
= efx
->type
->max_dma_mask
;
1089 netif_dbg(efx
, probe
, efx
->net_dev
, "initialising I/O\n");
1091 rc
= pci_enable_device(pci_dev
);
1093 netif_err(efx
, probe
, efx
->net_dev
,
1094 "failed to enable PCI device\n");
1098 pci_set_master(pci_dev
);
1100 /* Set the PCI DMA mask. Try all possibilities from our
1101 * genuine mask down to 32 bits, because some architectures
1102 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
1103 * masks event though they reject 46 bit masks.
1105 while (dma_mask
> 0x7fffffffUL
) {
1106 if (pci_dma_supported(pci_dev
, dma_mask
)) {
1107 rc
= pci_set_dma_mask(pci_dev
, dma_mask
);
1114 netif_err(efx
, probe
, efx
->net_dev
,
1115 "could not find a suitable DMA mask\n");
1118 netif_dbg(efx
, probe
, efx
->net_dev
,
1119 "using DMA mask %llx\n", (unsigned long long) dma_mask
);
1120 rc
= pci_set_consistent_dma_mask(pci_dev
, dma_mask
);
1122 /* pci_set_consistent_dma_mask() is not *allowed* to
1123 * fail with a mask that pci_set_dma_mask() accepted,
1124 * but just in case...
1126 netif_err(efx
, probe
, efx
->net_dev
,
1127 "failed to set consistent DMA mask\n");
1131 efx
->membase_phys
= pci_resource_start(efx
->pci_dev
, EFX_MEM_BAR
);
1132 rc
= pci_request_region(pci_dev
, EFX_MEM_BAR
, "sfc");
1134 netif_err(efx
, probe
, efx
->net_dev
,
1135 "request for memory BAR failed\n");
1139 efx
->membase
= ioremap_nocache(efx
->membase_phys
,
1140 efx
->type
->mem_map_size
);
1141 if (!efx
->membase
) {
1142 netif_err(efx
, probe
, efx
->net_dev
,
1143 "could not map memory BAR at %llx+%x\n",
1144 (unsigned long long)efx
->membase_phys
,
1145 efx
->type
->mem_map_size
);
1149 netif_dbg(efx
, probe
, efx
->net_dev
,
1150 "memory BAR at %llx+%x (virtual %p)\n",
1151 (unsigned long long)efx
->membase_phys
,
1152 efx
->type
->mem_map_size
, efx
->membase
);
1157 pci_release_region(efx
->pci_dev
, EFX_MEM_BAR
);
1159 efx
->membase_phys
= 0;
1161 pci_disable_device(efx
->pci_dev
);
1166 static void efx_fini_io(struct efx_nic
*efx
)
1168 netif_dbg(efx
, drv
, efx
->net_dev
, "shutting down I/O\n");
1171 iounmap(efx
->membase
);
1172 efx
->membase
= NULL
;
1175 if (efx
->membase_phys
) {
1176 pci_release_region(efx
->pci_dev
, EFX_MEM_BAR
);
1177 efx
->membase_phys
= 0;
1180 pci_disable_device(efx
->pci_dev
);
1183 static unsigned int efx_wanted_parallelism(struct efx_nic
*efx
)
1185 cpumask_var_t thread_mask
;
1192 if (unlikely(!zalloc_cpumask_var(&thread_mask
, GFP_KERNEL
))) {
1193 netif_warn(efx
, probe
, efx
->net_dev
,
1194 "RSS disabled due to allocation failure\n");
1199 for_each_online_cpu(cpu
) {
1200 if (!cpumask_test_cpu(cpu
, thread_mask
)) {
1202 cpumask_or(thread_mask
, thread_mask
,
1203 topology_thread_cpumask(cpu
));
1207 free_cpumask_var(thread_mask
);
1210 /* If RSS is requested for the PF *and* VFs then we can't write RSS
1211 * table entries that are inaccessible to VFs
1213 if (efx_sriov_wanted(efx
) && efx_vf_size(efx
) > 1 &&
1214 count
> efx_vf_size(efx
)) {
1215 netif_warn(efx
, probe
, efx
->net_dev
,
1216 "Reducing number of RSS channels from %u to %u for "
1217 "VF support. Increase vf-msix-limit to use more "
1218 "channels on the PF.\n",
1219 count
, efx_vf_size(efx
));
1220 count
= efx_vf_size(efx
);
1227 efx_init_rx_cpu_rmap(struct efx_nic
*efx
, struct msix_entry
*xentries
)
1229 #ifdef CONFIG_RFS_ACCEL
1233 efx
->net_dev
->rx_cpu_rmap
= alloc_irq_cpu_rmap(efx
->n_rx_channels
);
1234 if (!efx
->net_dev
->rx_cpu_rmap
)
1236 for (i
= 0; i
< efx
->n_rx_channels
; i
++) {
1237 rc
= irq_cpu_rmap_add(efx
->net_dev
->rx_cpu_rmap
,
1238 xentries
[i
].vector
);
1240 free_irq_cpu_rmap(efx
->net_dev
->rx_cpu_rmap
);
1241 efx
->net_dev
->rx_cpu_rmap
= NULL
;
1249 /* Probe the number and type of interrupts we are able to obtain, and
1250 * the resulting numbers of channels and RX queues.
1252 static int efx_probe_interrupts(struct efx_nic
*efx
)
1254 unsigned int max_channels
=
1255 min(efx
->type
->phys_addr_channels
, EFX_MAX_CHANNELS
);
1256 unsigned int extra_channels
= 0;
1260 for (i
= 0; i
< EFX_MAX_EXTRA_CHANNELS
; i
++)
1261 if (efx
->extra_channel_type
[i
])
1264 if (efx
->interrupt_mode
== EFX_INT_MODE_MSIX
) {
1265 struct msix_entry xentries
[EFX_MAX_CHANNELS
];
1266 unsigned int n_channels
;
1268 n_channels
= efx_wanted_parallelism(efx
);
1269 if (separate_tx_channels
)
1271 n_channels
+= extra_channels
;
1272 n_channels
= min(n_channels
, max_channels
);
1274 for (i
= 0; i
< n_channels
; i
++)
1275 xentries
[i
].entry
= i
;
1276 rc
= pci_enable_msix(efx
->pci_dev
, xentries
, n_channels
);
1278 netif_err(efx
, drv
, efx
->net_dev
,
1279 "WARNING: Insufficient MSI-X vectors"
1280 " available (%d < %u).\n", rc
, n_channels
);
1281 netif_err(efx
, drv
, efx
->net_dev
,
1282 "WARNING: Performance may be reduced.\n");
1283 EFX_BUG_ON_PARANOID(rc
>= n_channels
);
1285 rc
= pci_enable_msix(efx
->pci_dev
, xentries
,
1290 efx
->n_channels
= n_channels
;
1291 if (n_channels
> extra_channels
)
1292 n_channels
-= extra_channels
;
1293 if (separate_tx_channels
) {
1294 efx
->n_tx_channels
= max(n_channels
/ 2, 1U);
1295 efx
->n_rx_channels
= max(n_channels
-
1299 efx
->n_tx_channels
= n_channels
;
1300 efx
->n_rx_channels
= n_channels
;
1302 rc
= efx_init_rx_cpu_rmap(efx
, xentries
);
1304 pci_disable_msix(efx
->pci_dev
);
1307 for (i
= 0; i
< efx
->n_channels
; i
++)
1308 efx_get_channel(efx
, i
)->irq
=
1311 /* Fall back to single channel MSI */
1312 efx
->interrupt_mode
= EFX_INT_MODE_MSI
;
1313 netif_err(efx
, drv
, efx
->net_dev
,
1314 "could not enable MSI-X\n");
1318 /* Try single interrupt MSI */
1319 if (efx
->interrupt_mode
== EFX_INT_MODE_MSI
) {
1320 efx
->n_channels
= 1;
1321 efx
->n_rx_channels
= 1;
1322 efx
->n_tx_channels
= 1;
1323 rc
= pci_enable_msi(efx
->pci_dev
);
1325 efx_get_channel(efx
, 0)->irq
= efx
->pci_dev
->irq
;
1327 netif_err(efx
, drv
, efx
->net_dev
,
1328 "could not enable MSI\n");
1329 efx
->interrupt_mode
= EFX_INT_MODE_LEGACY
;
1333 /* Assume legacy interrupts */
1334 if (efx
->interrupt_mode
== EFX_INT_MODE_LEGACY
) {
1335 efx
->n_channels
= 1 + (separate_tx_channels
? 1 : 0);
1336 efx
->n_rx_channels
= 1;
1337 efx
->n_tx_channels
= 1;
1338 efx
->legacy_irq
= efx
->pci_dev
->irq
;
1341 /* Assign extra channels if possible */
1342 j
= efx
->n_channels
;
1343 for (i
= 0; i
< EFX_MAX_EXTRA_CHANNELS
; i
++) {
1344 if (!efx
->extra_channel_type
[i
])
1346 if (efx
->interrupt_mode
!= EFX_INT_MODE_MSIX
||
1347 efx
->n_channels
<= extra_channels
) {
1348 efx
->extra_channel_type
[i
]->handle_no_channel(efx
);
1351 efx_get_channel(efx
, j
)->type
=
1352 efx
->extra_channel_type
[i
];
1356 /* RSS might be usable on VFs even if it is disabled on the PF */
1357 efx
->rss_spread
= ((efx
->n_rx_channels
> 1 || !efx_sriov_wanted(efx
)) ?
1358 efx
->n_rx_channels
: efx_vf_size(efx
));
1363 /* Enable interrupts, then probe and start the event queues */
1364 static void efx_start_interrupts(struct efx_nic
*efx
, bool may_keep_eventq
)
1366 struct efx_channel
*channel
;
1368 if (efx
->legacy_irq
)
1369 efx
->legacy_irq_enabled
= true;
1370 efx_nic_enable_interrupts(efx
);
1372 efx_for_each_channel(channel
, efx
) {
1373 if (!channel
->type
->keep_eventq
|| !may_keep_eventq
)
1374 efx_init_eventq(channel
);
1375 efx_start_eventq(channel
);
1378 efx_mcdi_mode_event(efx
);
1381 static void efx_stop_interrupts(struct efx_nic
*efx
, bool may_keep_eventq
)
1383 struct efx_channel
*channel
;
1385 efx_mcdi_mode_poll(efx
);
1387 efx_nic_disable_interrupts(efx
);
1388 if (efx
->legacy_irq
) {
1389 synchronize_irq(efx
->legacy_irq
);
1390 efx
->legacy_irq_enabled
= false;
1393 efx_for_each_channel(channel
, efx
) {
1395 synchronize_irq(channel
->irq
);
1397 efx_stop_eventq(channel
);
1398 if (!channel
->type
->keep_eventq
|| !may_keep_eventq
)
1399 efx_fini_eventq(channel
);
1403 static void efx_remove_interrupts(struct efx_nic
*efx
)
1405 struct efx_channel
*channel
;
1407 /* Remove MSI/MSI-X interrupts */
1408 efx_for_each_channel(channel
, efx
)
1410 pci_disable_msi(efx
->pci_dev
);
1411 pci_disable_msix(efx
->pci_dev
);
1413 /* Remove legacy interrupt */
1414 efx
->legacy_irq
= 0;
1417 static void efx_set_channels(struct efx_nic
*efx
)
1419 struct efx_channel
*channel
;
1420 struct efx_tx_queue
*tx_queue
;
1422 efx
->tx_channel_offset
=
1423 separate_tx_channels
? efx
->n_channels
- efx
->n_tx_channels
: 0;
1425 /* We need to adjust the TX queue numbers if we have separate
1426 * RX-only and TX-only channels.
1428 efx_for_each_channel(channel
, efx
) {
1429 efx_for_each_channel_tx_queue(tx_queue
, channel
)
1430 tx_queue
->queue
-= (efx
->tx_channel_offset
*
1435 static int efx_probe_nic(struct efx_nic
*efx
)
1440 netif_dbg(efx
, probe
, efx
->net_dev
, "creating NIC\n");
1442 /* Carry out hardware-type specific initialisation */
1443 rc
= efx
->type
->probe(efx
);
1447 /* Determine the number of channels and queues by trying to hook
1448 * in MSI-X interrupts. */
1449 rc
= efx_probe_interrupts(efx
);
1453 efx
->type
->dimension_resources(efx
);
1455 if (efx
->n_channels
> 1)
1456 get_random_bytes(&efx
->rx_hash_key
, sizeof(efx
->rx_hash_key
));
1457 for (i
= 0; i
< ARRAY_SIZE(efx
->rx_indir_table
); i
++)
1458 efx
->rx_indir_table
[i
] =
1459 ethtool_rxfh_indir_default(i
, efx
->rss_spread
);
1461 efx_set_channels(efx
);
1462 netif_set_real_num_tx_queues(efx
->net_dev
, efx
->n_tx_channels
);
1463 netif_set_real_num_rx_queues(efx
->net_dev
, efx
->n_rx_channels
);
1465 /* Initialise the interrupt moderation settings */
1466 efx_init_irq_moderation(efx
, tx_irq_mod_usec
, rx_irq_mod_usec
, true,
1472 efx
->type
->remove(efx
);
1476 static void efx_remove_nic(struct efx_nic
*efx
)
1478 netif_dbg(efx
, drv
, efx
->net_dev
, "destroying NIC\n");
1480 efx_remove_interrupts(efx
);
1481 efx
->type
->remove(efx
);
1484 /**************************************************************************
1486 * NIC startup/shutdown
1488 *************************************************************************/
1490 static int efx_probe_all(struct efx_nic
*efx
)
1494 rc
= efx_probe_nic(efx
);
1496 netif_err(efx
, probe
, efx
->net_dev
, "failed to create NIC\n");
1500 rc
= efx_probe_port(efx
);
1502 netif_err(efx
, probe
, efx
->net_dev
, "failed to create port\n");
1506 efx
->rxq_entries
= efx
->txq_entries
= EFX_DEFAULT_DMAQ_SIZE
;
1508 rc
= efx_probe_filters(efx
);
1510 netif_err(efx
, probe
, efx
->net_dev
,
1511 "failed to create filter tables\n");
1515 rc
= efx_probe_channels(efx
);
1522 efx_remove_filters(efx
);
1524 efx_remove_port(efx
);
1526 efx_remove_nic(efx
);
1531 /* Called after previous invocation(s) of efx_stop_all, restarts the port,
1532 * kernel transmit queues and NAPI processing, and ensures that the port is
1533 * scheduled to be reconfigured. This function is safe to call multiple
1534 * times when the NIC is in any state.
1536 static void efx_start_all(struct efx_nic
*efx
)
1538 EFX_ASSERT_RESET_SERIALISED(efx
);
1540 /* Check that it is appropriate to restart the interface. All
1541 * of these flags are safe to read under just the rtnl lock */
1542 if (efx
->port_enabled
)
1544 if ((efx
->state
!= STATE_RUNNING
) && (efx
->state
!= STATE_INIT
))
1546 if (!netif_running(efx
->net_dev
))
1549 efx_start_port(efx
);
1550 efx_start_datapath(efx
);
1552 /* Start the hardware monitor if there is one. Otherwise (we're link
1553 * event driven), we have to poll the PHY because after an event queue
1554 * flush, we could have a missed a link state change */
1555 if (efx
->type
->monitor
!= NULL
) {
1556 queue_delayed_work(efx
->workqueue
, &efx
->monitor_work
,
1557 efx_monitor_interval
);
1559 mutex_lock(&efx
->mac_lock
);
1560 if (efx
->phy_op
->poll(efx
))
1561 efx_link_status_changed(efx
);
1562 mutex_unlock(&efx
->mac_lock
);
1565 efx
->type
->start_stats(efx
);
1568 /* Flush all delayed work. Should only be called when no more delayed work
1569 * will be scheduled. This doesn't flush pending online resets (efx_reset),
1570 * since we're holding the rtnl_lock at this point. */
1571 static void efx_flush_all(struct efx_nic
*efx
)
1573 /* Make sure the hardware monitor and event self-test are stopped */
1574 cancel_delayed_work_sync(&efx
->monitor_work
);
1575 efx_selftest_async_cancel(efx
);
1576 /* Stop scheduled port reconfigurations */
1577 cancel_work_sync(&efx
->mac_work
);
1580 /* Quiesce hardware and software without bringing the link down.
1581 * Safe to call multiple times, when the nic and interface is in any
1582 * state. The caller is guaranteed to subsequently be in a position
1583 * to modify any hardware and software state they see fit without
1585 static void efx_stop_all(struct efx_nic
*efx
)
1587 EFX_ASSERT_RESET_SERIALISED(efx
);
1589 /* port_enabled can be read safely under the rtnl lock */
1590 if (!efx
->port_enabled
)
1593 efx
->type
->stop_stats(efx
);
1596 /* Flush efx_mac_work(), refill_workqueue, monitor_work */
1599 /* Stop the kernel transmit interface late, so the watchdog
1600 * timer isn't ticking over the flush */
1601 netif_tx_disable(efx
->net_dev
);
1603 efx_stop_datapath(efx
);
1606 static void efx_remove_all(struct efx_nic
*efx
)
1608 efx_remove_channels(efx
);
1609 efx_remove_filters(efx
);
1610 efx_remove_port(efx
);
1611 efx_remove_nic(efx
);
1614 /**************************************************************************
1616 * Interrupt moderation
1618 **************************************************************************/
1620 static unsigned int irq_mod_ticks(unsigned int usecs
, unsigned int quantum_ns
)
1624 if (usecs
* 1000 < quantum_ns
)
1625 return 1; /* never round down to 0 */
1626 return usecs
* 1000 / quantum_ns
;
1629 /* Set interrupt moderation parameters */
1630 int efx_init_irq_moderation(struct efx_nic
*efx
, unsigned int tx_usecs
,
1631 unsigned int rx_usecs
, bool rx_adaptive
,
1632 bool rx_may_override_tx
)
1634 struct efx_channel
*channel
;
1635 unsigned int irq_mod_max
= DIV_ROUND_UP(efx
->type
->timer_period_max
*
1636 efx
->timer_quantum_ns
,
1638 unsigned int tx_ticks
;
1639 unsigned int rx_ticks
;
1641 EFX_ASSERT_RESET_SERIALISED(efx
);
1643 if (tx_usecs
> irq_mod_max
|| rx_usecs
> irq_mod_max
)
1646 tx_ticks
= irq_mod_ticks(tx_usecs
, efx
->timer_quantum_ns
);
1647 rx_ticks
= irq_mod_ticks(rx_usecs
, efx
->timer_quantum_ns
);
1649 if (tx_ticks
!= rx_ticks
&& efx
->tx_channel_offset
== 0 &&
1650 !rx_may_override_tx
) {
1651 netif_err(efx
, drv
, efx
->net_dev
, "Channels are shared. "
1652 "RX and TX IRQ moderation must be equal\n");
1656 efx
->irq_rx_adaptive
= rx_adaptive
;
1657 efx
->irq_rx_moderation
= rx_ticks
;
1658 efx_for_each_channel(channel
, efx
) {
1659 if (efx_channel_has_rx_queue(channel
))
1660 channel
->irq_moderation
= rx_ticks
;
1661 else if (efx_channel_has_tx_queues(channel
))
1662 channel
->irq_moderation
= tx_ticks
;
1668 void efx_get_irq_moderation(struct efx_nic
*efx
, unsigned int *tx_usecs
,
1669 unsigned int *rx_usecs
, bool *rx_adaptive
)
1671 /* We must round up when converting ticks to microseconds
1672 * because we round down when converting the other way.
1675 *rx_adaptive
= efx
->irq_rx_adaptive
;
1676 *rx_usecs
= DIV_ROUND_UP(efx
->irq_rx_moderation
*
1677 efx
->timer_quantum_ns
,
1680 /* If channels are shared between RX and TX, so is IRQ
1681 * moderation. Otherwise, IRQ moderation is the same for all
1682 * TX channels and is not adaptive.
1684 if (efx
->tx_channel_offset
== 0)
1685 *tx_usecs
= *rx_usecs
;
1687 *tx_usecs
= DIV_ROUND_UP(
1688 efx
->channel
[efx
->tx_channel_offset
]->irq_moderation
*
1689 efx
->timer_quantum_ns
,
1693 /**************************************************************************
1697 **************************************************************************/
1699 /* Run periodically off the general workqueue */
1700 static void efx_monitor(struct work_struct
*data
)
1702 struct efx_nic
*efx
= container_of(data
, struct efx_nic
,
1705 netif_vdbg(efx
, timer
, efx
->net_dev
,
1706 "hardware monitor executing on CPU %d\n",
1707 raw_smp_processor_id());
1708 BUG_ON(efx
->type
->monitor
== NULL
);
1710 /* If the mac_lock is already held then it is likely a port
1711 * reconfiguration is already in place, which will likely do
1712 * most of the work of monitor() anyway. */
1713 if (mutex_trylock(&efx
->mac_lock
)) {
1714 if (efx
->port_enabled
)
1715 efx
->type
->monitor(efx
);
1716 mutex_unlock(&efx
->mac_lock
);
1719 queue_delayed_work(efx
->workqueue
, &efx
->monitor_work
,
1720 efx_monitor_interval
);
1723 /**************************************************************************
1727 *************************************************************************/
1730 * Context: process, rtnl_lock() held.
1732 static int efx_ioctl(struct net_device
*net_dev
, struct ifreq
*ifr
, int cmd
)
1734 struct efx_nic
*efx
= netdev_priv(net_dev
);
1735 struct mii_ioctl_data
*data
= if_mii(ifr
);
1737 EFX_ASSERT_RESET_SERIALISED(efx
);
1739 /* Convert phy_id from older PRTAD/DEVAD format */
1740 if ((cmd
== SIOCGMIIREG
|| cmd
== SIOCSMIIREG
) &&
1741 (data
->phy_id
& 0xfc00) == 0x0400)
1742 data
->phy_id
^= MDIO_PHY_ID_C45
| 0x0400;
1744 return mdio_mii_ioctl(&efx
->mdio
, data
, cmd
);
1747 /**************************************************************************
1751 **************************************************************************/
1753 static void efx_init_napi_channel(struct efx_channel
*channel
)
1755 struct efx_nic
*efx
= channel
->efx
;
1757 channel
->napi_dev
= efx
->net_dev
;
1758 netif_napi_add(channel
->napi_dev
, &channel
->napi_str
,
1759 efx_poll
, napi_weight
);
1762 static void efx_init_napi(struct efx_nic
*efx
)
1764 struct efx_channel
*channel
;
1766 efx_for_each_channel(channel
, efx
)
1767 efx_init_napi_channel(channel
);
1770 static void efx_fini_napi_channel(struct efx_channel
*channel
)
1772 if (channel
->napi_dev
)
1773 netif_napi_del(&channel
->napi_str
);
1774 channel
->napi_dev
= NULL
;
1777 static void efx_fini_napi(struct efx_nic
*efx
)
1779 struct efx_channel
*channel
;
1781 efx_for_each_channel(channel
, efx
)
1782 efx_fini_napi_channel(channel
);
1785 /**************************************************************************
1787 * Kernel netpoll interface
1789 *************************************************************************/
1791 #ifdef CONFIG_NET_POLL_CONTROLLER
1793 /* Although in the common case interrupts will be disabled, this is not
1794 * guaranteed. However, all our work happens inside the NAPI callback,
1795 * so no locking is required.
1797 static void efx_netpoll(struct net_device
*net_dev
)
1799 struct efx_nic
*efx
= netdev_priv(net_dev
);
1800 struct efx_channel
*channel
;
1802 efx_for_each_channel(channel
, efx
)
1803 efx_schedule_channel(channel
);
1808 /**************************************************************************
1810 * Kernel net device interface
1812 *************************************************************************/
1814 /* Context: process, rtnl_lock() held. */
1815 static int efx_net_open(struct net_device
*net_dev
)
1817 struct efx_nic
*efx
= netdev_priv(net_dev
);
1818 EFX_ASSERT_RESET_SERIALISED(efx
);
1820 netif_dbg(efx
, ifup
, efx
->net_dev
, "opening device on CPU %d\n",
1821 raw_smp_processor_id());
1823 if (efx
->state
== STATE_DISABLED
)
1825 if (efx
->phy_mode
& PHY_MODE_SPECIAL
)
1827 if (efx_mcdi_poll_reboot(efx
) && efx_reset(efx
, RESET_TYPE_ALL
))
1830 /* Notify the kernel of the link state polled during driver load,
1831 * before the monitor starts running */
1832 efx_link_status_changed(efx
);
1835 efx_selftest_async_start(efx
);
1839 /* Context: process, rtnl_lock() held.
1840 * Note that the kernel will ignore our return code; this method
1841 * should really be a void.
1843 static int efx_net_stop(struct net_device
*net_dev
)
1845 struct efx_nic
*efx
= netdev_priv(net_dev
);
1847 netif_dbg(efx
, ifdown
, efx
->net_dev
, "closing on CPU %d\n",
1848 raw_smp_processor_id());
1850 if (efx
->state
!= STATE_DISABLED
) {
1851 /* Stop the device and flush all the channels */
1858 /* Context: process, dev_base_lock or RTNL held, non-blocking. */
1859 static struct rtnl_link_stats64
*efx_net_stats(struct net_device
*net_dev
,
1860 struct rtnl_link_stats64
*stats
)
1862 struct efx_nic
*efx
= netdev_priv(net_dev
);
1863 struct efx_mac_stats
*mac_stats
= &efx
->mac_stats
;
1865 spin_lock_bh(&efx
->stats_lock
);
1867 efx
->type
->update_stats(efx
);
1869 stats
->rx_packets
= mac_stats
->rx_packets
;
1870 stats
->tx_packets
= mac_stats
->tx_packets
;
1871 stats
->rx_bytes
= mac_stats
->rx_bytes
;
1872 stats
->tx_bytes
= mac_stats
->tx_bytes
;
1873 stats
->rx_dropped
= efx
->n_rx_nodesc_drop_cnt
;
1874 stats
->multicast
= mac_stats
->rx_multicast
;
1875 stats
->collisions
= mac_stats
->tx_collision
;
1876 stats
->rx_length_errors
= (mac_stats
->rx_gtjumbo
+
1877 mac_stats
->rx_length_error
);
1878 stats
->rx_crc_errors
= mac_stats
->rx_bad
;
1879 stats
->rx_frame_errors
= mac_stats
->rx_align_error
;
1880 stats
->rx_fifo_errors
= mac_stats
->rx_overflow
;
1881 stats
->rx_missed_errors
= mac_stats
->rx_missed
;
1882 stats
->tx_window_errors
= mac_stats
->tx_late_collision
;
1884 stats
->rx_errors
= (stats
->rx_length_errors
+
1885 stats
->rx_crc_errors
+
1886 stats
->rx_frame_errors
+
1887 mac_stats
->rx_symbol_error
);
1888 stats
->tx_errors
= (stats
->tx_window_errors
+
1891 spin_unlock_bh(&efx
->stats_lock
);
1896 /* Context: netif_tx_lock held, BHs disabled. */
1897 static void efx_watchdog(struct net_device
*net_dev
)
1899 struct efx_nic
*efx
= netdev_priv(net_dev
);
1901 netif_err(efx
, tx_err
, efx
->net_dev
,
1902 "TX stuck with port_enabled=%d: resetting channels\n",
1905 efx_schedule_reset(efx
, RESET_TYPE_TX_WATCHDOG
);
1909 /* Context: process, rtnl_lock() held. */
1910 static int efx_change_mtu(struct net_device
*net_dev
, int new_mtu
)
1912 struct efx_nic
*efx
= netdev_priv(net_dev
);
1914 EFX_ASSERT_RESET_SERIALISED(efx
);
1916 if (new_mtu
> EFX_MAX_MTU
)
1921 netif_dbg(efx
, drv
, efx
->net_dev
, "changing MTU to %d\n", new_mtu
);
1923 mutex_lock(&efx
->mac_lock
);
1924 /* Reconfigure the MAC before enabling the dma queues so that
1925 * the RX buffers don't overflow */
1926 net_dev
->mtu
= new_mtu
;
1927 efx
->type
->reconfigure_mac(efx
);
1928 mutex_unlock(&efx
->mac_lock
);
1934 static int efx_set_mac_address(struct net_device
*net_dev
, void *data
)
1936 struct efx_nic
*efx
= netdev_priv(net_dev
);
1937 struct sockaddr
*addr
= data
;
1938 char *new_addr
= addr
->sa_data
;
1940 EFX_ASSERT_RESET_SERIALISED(efx
);
1942 if (!is_valid_ether_addr(new_addr
)) {
1943 netif_err(efx
, drv
, efx
->net_dev
,
1944 "invalid ethernet MAC address requested: %pM\n",
1946 return -EADDRNOTAVAIL
;
1949 memcpy(net_dev
->dev_addr
, new_addr
, net_dev
->addr_len
);
1950 efx_sriov_mac_address_changed(efx
);
1952 /* Reconfigure the MAC */
1953 mutex_lock(&efx
->mac_lock
);
1954 efx
->type
->reconfigure_mac(efx
);
1955 mutex_unlock(&efx
->mac_lock
);
1960 /* Context: netif_addr_lock held, BHs disabled. */
1961 static void efx_set_rx_mode(struct net_device
*net_dev
)
1963 struct efx_nic
*efx
= netdev_priv(net_dev
);
1964 struct netdev_hw_addr
*ha
;
1965 union efx_multicast_hash
*mc_hash
= &efx
->multicast_hash
;
1969 efx
->promiscuous
= !!(net_dev
->flags
& IFF_PROMISC
);
1971 /* Build multicast hash table */
1972 if (efx
->promiscuous
|| (net_dev
->flags
& IFF_ALLMULTI
)) {
1973 memset(mc_hash
, 0xff, sizeof(*mc_hash
));
1975 memset(mc_hash
, 0x00, sizeof(*mc_hash
));
1976 netdev_for_each_mc_addr(ha
, net_dev
) {
1977 crc
= ether_crc_le(ETH_ALEN
, ha
->addr
);
1978 bit
= crc
& (EFX_MCAST_HASH_ENTRIES
- 1);
1979 set_bit_le(bit
, mc_hash
->byte
);
1982 /* Broadcast packets go through the multicast hash filter.
1983 * ether_crc_le() of the broadcast address is 0xbe2612ff
1984 * so we always add bit 0xff to the mask.
1986 set_bit_le(0xff, mc_hash
->byte
);
1989 if (efx
->port_enabled
)
1990 queue_work(efx
->workqueue
, &efx
->mac_work
);
1991 /* Otherwise efx_start_port() will do this */
1994 static int efx_set_features(struct net_device
*net_dev
, netdev_features_t data
)
1996 struct efx_nic
*efx
= netdev_priv(net_dev
);
1998 /* If disabling RX n-tuple filtering, clear existing filters */
1999 if (net_dev
->features
& ~data
& NETIF_F_NTUPLE
)
2000 efx_filter_clear_rx(efx
, EFX_FILTER_PRI_MANUAL
);
2005 static const struct net_device_ops efx_netdev_ops
= {
2006 .ndo_open
= efx_net_open
,
2007 .ndo_stop
= efx_net_stop
,
2008 .ndo_get_stats64
= efx_net_stats
,
2009 .ndo_tx_timeout
= efx_watchdog
,
2010 .ndo_start_xmit
= efx_hard_start_xmit
,
2011 .ndo_validate_addr
= eth_validate_addr
,
2012 .ndo_do_ioctl
= efx_ioctl
,
2013 .ndo_change_mtu
= efx_change_mtu
,
2014 .ndo_set_mac_address
= efx_set_mac_address
,
2015 .ndo_set_rx_mode
= efx_set_rx_mode
,
2016 .ndo_set_features
= efx_set_features
,
2017 #ifdef CONFIG_SFC_SRIOV
2018 .ndo_set_vf_mac
= efx_sriov_set_vf_mac
,
2019 .ndo_set_vf_vlan
= efx_sriov_set_vf_vlan
,
2020 .ndo_set_vf_spoofchk
= efx_sriov_set_vf_spoofchk
,
2021 .ndo_get_vf_config
= efx_sriov_get_vf_config
,
2023 #ifdef CONFIG_NET_POLL_CONTROLLER
2024 .ndo_poll_controller
= efx_netpoll
,
2026 .ndo_setup_tc
= efx_setup_tc
,
2027 #ifdef CONFIG_RFS_ACCEL
2028 .ndo_rx_flow_steer
= efx_filter_rfs
,
2032 static void efx_update_name(struct efx_nic
*efx
)
2034 strcpy(efx
->name
, efx
->net_dev
->name
);
2035 efx_mtd_rename(efx
);
2036 efx_set_channel_names(efx
);
2039 static int efx_netdev_event(struct notifier_block
*this,
2040 unsigned long event
, void *ptr
)
2042 struct net_device
*net_dev
= ptr
;
2044 if (net_dev
->netdev_ops
== &efx_netdev_ops
&&
2045 event
== NETDEV_CHANGENAME
)
2046 efx_update_name(netdev_priv(net_dev
));
2051 static struct notifier_block efx_netdev_notifier
= {
2052 .notifier_call
= efx_netdev_event
,
2056 show_phy_type(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
2058 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
2059 return sprintf(buf
, "%d\n", efx
->phy_type
);
2061 static DEVICE_ATTR(phy_type
, 0644, show_phy_type
, NULL
);
2063 static int efx_register_netdev(struct efx_nic
*efx
)
2065 struct net_device
*net_dev
= efx
->net_dev
;
2066 struct efx_channel
*channel
;
2069 net_dev
->watchdog_timeo
= 5 * HZ
;
2070 net_dev
->irq
= efx
->pci_dev
->irq
;
2071 net_dev
->netdev_ops
= &efx_netdev_ops
;
2072 SET_ETHTOOL_OPS(net_dev
, &efx_ethtool_ops
);
2076 rc
= dev_alloc_name(net_dev
, net_dev
->name
);
2079 efx_update_name(efx
);
2081 rc
= register_netdevice(net_dev
);
2085 efx_for_each_channel(channel
, efx
) {
2086 struct efx_tx_queue
*tx_queue
;
2087 efx_for_each_channel_tx_queue(tx_queue
, channel
)
2088 efx_init_tx_queue_core_txq(tx_queue
);
2091 /* Always start with carrier off; PHY events will detect the link */
2092 netif_carrier_off(net_dev
);
2096 rc
= device_create_file(&efx
->pci_dev
->dev
, &dev_attr_phy_type
);
2098 netif_err(efx
, drv
, efx
->net_dev
,
2099 "failed to init net dev attributes\n");
2100 goto fail_registered
;
2107 netif_err(efx
, drv
, efx
->net_dev
, "could not register net dev\n");
2111 unregister_netdev(net_dev
);
2115 static void efx_unregister_netdev(struct efx_nic
*efx
)
2117 struct efx_channel
*channel
;
2118 struct efx_tx_queue
*tx_queue
;
2123 BUG_ON(netdev_priv(efx
->net_dev
) != efx
);
2125 /* Free up any skbs still remaining. This has to happen before
2126 * we try to unregister the netdev as running their destructors
2127 * may be needed to get the device ref. count to 0. */
2128 efx_for_each_channel(channel
, efx
) {
2129 efx_for_each_channel_tx_queue(tx_queue
, channel
)
2130 efx_release_tx_buffers(tx_queue
);
2133 strlcpy(efx
->name
, pci_name(efx
->pci_dev
), sizeof(efx
->name
));
2134 device_remove_file(&efx
->pci_dev
->dev
, &dev_attr_phy_type
);
2135 unregister_netdev(efx
->net_dev
);
2138 /**************************************************************************
2140 * Device reset and suspend
2142 **************************************************************************/
2144 /* Tears down the entire software state and most of the hardware state
2146 void efx_reset_down(struct efx_nic
*efx
, enum reset_type method
)
2148 EFX_ASSERT_RESET_SERIALISED(efx
);
2151 mutex_lock(&efx
->mac_lock
);
2153 efx_stop_interrupts(efx
, false);
2154 if (efx
->port_initialized
&& method
!= RESET_TYPE_INVISIBLE
)
2155 efx
->phy_op
->fini(efx
);
2156 efx
->type
->fini(efx
);
2159 /* This function will always ensure that the locks acquired in
2160 * efx_reset_down() are released. A failure return code indicates
2161 * that we were unable to reinitialise the hardware, and the
2162 * driver should be disabled. If ok is false, then the rx and tx
2163 * engines are not restarted, pending a RESET_DISABLE. */
2164 int efx_reset_up(struct efx_nic
*efx
, enum reset_type method
, bool ok
)
2168 EFX_ASSERT_RESET_SERIALISED(efx
);
2170 rc
= efx
->type
->init(efx
);
2172 netif_err(efx
, drv
, efx
->net_dev
, "failed to initialise NIC\n");
2179 if (efx
->port_initialized
&& method
!= RESET_TYPE_INVISIBLE
) {
2180 rc
= efx
->phy_op
->init(efx
);
2183 if (efx
->phy_op
->reconfigure(efx
))
2184 netif_err(efx
, drv
, efx
->net_dev
,
2185 "could not restore PHY settings\n");
2188 efx
->type
->reconfigure_mac(efx
);
2190 efx_start_interrupts(efx
, false);
2191 efx_restore_filters(efx
);
2192 efx_sriov_reset(efx
);
2194 mutex_unlock(&efx
->mac_lock
);
2201 efx
->port_initialized
= false;
2203 mutex_unlock(&efx
->mac_lock
);
2208 /* Reset the NIC using the specified method. Note that the reset may
2209 * fail, in which case the card will be left in an unusable state.
2211 * Caller must hold the rtnl_lock.
2213 int efx_reset(struct efx_nic
*efx
, enum reset_type method
)
2218 netif_info(efx
, drv
, efx
->net_dev
, "resetting (%s)\n",
2219 RESET_TYPE(method
));
2221 netif_device_detach(efx
->net_dev
);
2222 efx_reset_down(efx
, method
);
2224 rc
= efx
->type
->reset(efx
, method
);
2226 netif_err(efx
, drv
, efx
->net_dev
, "failed to reset hardware\n");
2230 /* Clear flags for the scopes we covered. We assume the NIC and
2231 * driver are now quiescent so that there is no race here.
2233 efx
->reset_pending
&= -(1 << (method
+ 1));
2235 /* Reinitialise bus-mastering, which may have been turned off before
2236 * the reset was scheduled. This is still appropriate, even in the
2237 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
2238 * can respond to requests. */
2239 pci_set_master(efx
->pci_dev
);
2242 /* Leave device stopped if necessary */
2243 disabled
= rc
|| method
== RESET_TYPE_DISABLE
;
2244 rc2
= efx_reset_up(efx
, method
, !disabled
);
2252 dev_close(efx
->net_dev
);
2253 netif_err(efx
, drv
, efx
->net_dev
, "has been disabled\n");
2254 efx
->state
= STATE_DISABLED
;
2256 netif_dbg(efx
, drv
, efx
->net_dev
, "reset complete\n");
2257 netif_device_attach(efx
->net_dev
);
2262 /* The worker thread exists so that code that cannot sleep can
2263 * schedule a reset for later.
2265 static void efx_reset_work(struct work_struct
*data
)
2267 struct efx_nic
*efx
= container_of(data
, struct efx_nic
, reset_work
);
2268 unsigned long pending
= ACCESS_ONCE(efx
->reset_pending
);
2273 /* If we're not RUNNING then don't reset. Leave the reset_pending
2274 * flags set so that efx_pci_probe_main will be retried */
2275 if (efx
->state
!= STATE_RUNNING
) {
2276 netif_info(efx
, drv
, efx
->net_dev
,
2277 "scheduled reset quenched. NIC not RUNNING\n");
2282 (void)efx_reset(efx
, fls(pending
) - 1);
2286 void efx_schedule_reset(struct efx_nic
*efx
, enum reset_type type
)
2288 enum reset_type method
;
2291 case RESET_TYPE_INVISIBLE
:
2292 case RESET_TYPE_ALL
:
2293 case RESET_TYPE_WORLD
:
2294 case RESET_TYPE_DISABLE
:
2296 netif_dbg(efx
, drv
, efx
->net_dev
, "scheduling %s reset\n",
2297 RESET_TYPE(method
));
2300 method
= efx
->type
->map_reset_reason(type
);
2301 netif_dbg(efx
, drv
, efx
->net_dev
,
2302 "scheduling %s reset for %s\n",
2303 RESET_TYPE(method
), RESET_TYPE(type
));
2307 set_bit(method
, &efx
->reset_pending
);
2309 /* efx_process_channel() will no longer read events once a
2310 * reset is scheduled. So switch back to poll'd MCDI completions. */
2311 efx_mcdi_mode_poll(efx
);
2313 queue_work(reset_workqueue
, &efx
->reset_work
);
2316 /**************************************************************************
2318 * List of NICs we support
2320 **************************************************************************/
2322 /* PCI device ID table */
2323 static DEFINE_PCI_DEVICE_TABLE(efx_pci_table
) = {
2324 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
,
2325 PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0
),
2326 .driver_data
= (unsigned long) &falcon_a1_nic_type
},
2327 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
,
2328 PCI_DEVICE_ID_SOLARFLARE_SFC4000B
),
2329 .driver_data
= (unsigned long) &falcon_b0_nic_type
},
2330 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0803), /* SFC9020 */
2331 .driver_data
= (unsigned long) &siena_a0_nic_type
},
2332 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0813), /* SFL9021 */
2333 .driver_data
= (unsigned long) &siena_a0_nic_type
},
2334 {0} /* end of list */
2337 /**************************************************************************
2339 * Dummy PHY/MAC operations
2341 * Can be used for some unimplemented operations
2342 * Needed so all function pointers are valid and do not have to be tested
2345 **************************************************************************/
2346 int efx_port_dummy_op_int(struct efx_nic
*efx
)
2350 void efx_port_dummy_op_void(struct efx_nic
*efx
) {}
2352 static bool efx_port_dummy_op_poll(struct efx_nic
*efx
)
2357 static const struct efx_phy_operations efx_dummy_phy_operations
= {
2358 .init
= efx_port_dummy_op_int
,
2359 .reconfigure
= efx_port_dummy_op_int
,
2360 .poll
= efx_port_dummy_op_poll
,
2361 .fini
= efx_port_dummy_op_void
,
2364 /**************************************************************************
2368 **************************************************************************/
2370 /* This zeroes out and then fills in the invariants in a struct
2371 * efx_nic (including all sub-structures).
2373 static int efx_init_struct(struct efx_nic
*efx
, const struct efx_nic_type
*type
,
2374 struct pci_dev
*pci_dev
, struct net_device
*net_dev
)
2378 /* Initialise common structures */
2379 memset(efx
, 0, sizeof(*efx
));
2380 spin_lock_init(&efx
->biu_lock
);
2381 #ifdef CONFIG_SFC_MTD
2382 INIT_LIST_HEAD(&efx
->mtd_list
);
2384 INIT_WORK(&efx
->reset_work
, efx_reset_work
);
2385 INIT_DELAYED_WORK(&efx
->monitor_work
, efx_monitor
);
2386 INIT_DELAYED_WORK(&efx
->selftest_work
, efx_selftest_async_work
);
2387 efx
->pci_dev
= pci_dev
;
2388 efx
->msg_enable
= debug
;
2389 efx
->state
= STATE_INIT
;
2390 strlcpy(efx
->name
, pci_name(pci_dev
), sizeof(efx
->name
));
2392 efx
->net_dev
= net_dev
;
2393 spin_lock_init(&efx
->stats_lock
);
2394 mutex_init(&efx
->mac_lock
);
2395 efx
->phy_op
= &efx_dummy_phy_operations
;
2396 efx
->mdio
.dev
= net_dev
;
2397 INIT_WORK(&efx
->mac_work
, efx_mac_work
);
2398 init_waitqueue_head(&efx
->flush_wq
);
2400 for (i
= 0; i
< EFX_MAX_CHANNELS
; i
++) {
2401 efx
->channel
[i
] = efx_alloc_channel(efx
, i
, NULL
);
2402 if (!efx
->channel
[i
])
2408 EFX_BUG_ON_PARANOID(efx
->type
->phys_addr_channels
> EFX_MAX_CHANNELS
);
2410 /* Higher numbered interrupt modes are less capable! */
2411 efx
->interrupt_mode
= max(efx
->type
->max_interrupt_mode
,
2414 /* Would be good to use the net_dev name, but we're too early */
2415 snprintf(efx
->workqueue_name
, sizeof(efx
->workqueue_name
), "sfc%s",
2417 efx
->workqueue
= create_singlethread_workqueue(efx
->workqueue_name
);
2418 if (!efx
->workqueue
)
2424 efx_fini_struct(efx
);
2428 static void efx_fini_struct(struct efx_nic
*efx
)
2432 for (i
= 0; i
< EFX_MAX_CHANNELS
; i
++)
2433 kfree(efx
->channel
[i
]);
2435 if (efx
->workqueue
) {
2436 destroy_workqueue(efx
->workqueue
);
2437 efx
->workqueue
= NULL
;
2441 /**************************************************************************
2445 **************************************************************************/
2447 /* Main body of final NIC shutdown code
2448 * This is called only at module unload (or hotplug removal).
2450 static void efx_pci_remove_main(struct efx_nic
*efx
)
2452 #ifdef CONFIG_RFS_ACCEL
2453 free_irq_cpu_rmap(efx
->net_dev
->rx_cpu_rmap
);
2454 efx
->net_dev
->rx_cpu_rmap
= NULL
;
2456 efx_stop_interrupts(efx
, false);
2457 efx_nic_fini_interrupt(efx
);
2459 efx
->type
->fini(efx
);
2461 efx_remove_all(efx
);
2464 /* Final NIC shutdown
2465 * This is called only at module unload (or hotplug removal).
2467 static void efx_pci_remove(struct pci_dev
*pci_dev
)
2469 struct efx_nic
*efx
;
2471 efx
= pci_get_drvdata(pci_dev
);
2475 /* Mark the NIC as fini, then stop the interface */
2477 efx
->state
= STATE_FINI
;
2478 dev_close(efx
->net_dev
);
2480 /* Allow any queued efx_resets() to complete */
2483 efx_stop_interrupts(efx
, false);
2484 efx_sriov_fini(efx
);
2485 efx_unregister_netdev(efx
);
2487 efx_mtd_remove(efx
);
2489 /* Wait for any scheduled resets to complete. No more will be
2490 * scheduled from this point because efx_stop_all() has been
2491 * called, we are no longer registered with driverlink, and
2492 * the net_device's have been removed. */
2493 cancel_work_sync(&efx
->reset_work
);
2495 efx_pci_remove_main(efx
);
2498 netif_dbg(efx
, drv
, efx
->net_dev
, "shutdown successful\n");
2500 efx_fini_struct(efx
);
2501 pci_set_drvdata(pci_dev
, NULL
);
2502 free_netdev(efx
->net_dev
);
2505 /* NIC VPD information
2506 * Called during probe to display the part number of the
2507 * installed NIC. VPD is potentially very large but this should
2508 * always appear within the first 512 bytes.
2510 #define SFC_VPD_LEN 512
2511 static void efx_print_product_vpd(struct efx_nic
*efx
)
2513 struct pci_dev
*dev
= efx
->pci_dev
;
2514 char vpd_data
[SFC_VPD_LEN
];
2518 /* Get the vpd data from the device */
2519 vpd_size
= pci_read_vpd(dev
, 0, sizeof(vpd_data
), vpd_data
);
2520 if (vpd_size
<= 0) {
2521 netif_err(efx
, drv
, efx
->net_dev
, "Unable to read VPD\n");
2525 /* Get the Read only section */
2526 i
= pci_vpd_find_tag(vpd_data
, 0, vpd_size
, PCI_VPD_LRDT_RO_DATA
);
2528 netif_err(efx
, drv
, efx
->net_dev
, "VPD Read-only not found\n");
2532 j
= pci_vpd_lrdt_size(&vpd_data
[i
]);
2533 i
+= PCI_VPD_LRDT_TAG_SIZE
;
2534 if (i
+ j
> vpd_size
)
2537 /* Get the Part number */
2538 i
= pci_vpd_find_info_keyword(vpd_data
, i
, j
, "PN");
2540 netif_err(efx
, drv
, efx
->net_dev
, "Part number not found\n");
2544 j
= pci_vpd_info_field_size(&vpd_data
[i
]);
2545 i
+= PCI_VPD_INFO_FLD_HDR_SIZE
;
2546 if (i
+ j
> vpd_size
) {
2547 netif_err(efx
, drv
, efx
->net_dev
, "Incomplete part number\n");
2551 netif_info(efx
, drv
, efx
->net_dev
,
2552 "Part Number : %.*s\n", j
, &vpd_data
[i
]);
2556 /* Main body of NIC initialisation
2557 * This is called at module load (or hotplug insertion, theoretically).
2559 static int efx_pci_probe_main(struct efx_nic
*efx
)
2563 /* Do start-of-day initialisation */
2564 rc
= efx_probe_all(efx
);
2570 rc
= efx
->type
->init(efx
);
2572 netif_err(efx
, probe
, efx
->net_dev
,
2573 "failed to initialise NIC\n");
2577 rc
= efx_init_port(efx
);
2579 netif_err(efx
, probe
, efx
->net_dev
,
2580 "failed to initialise port\n");
2584 rc
= efx_nic_init_interrupt(efx
);
2587 efx_start_interrupts(efx
, false);
2594 efx
->type
->fini(efx
);
2597 efx_remove_all(efx
);
2602 /* NIC initialisation
2604 * This is called at module load (or hotplug insertion,
2605 * theoretically). It sets up PCI mappings, resets the NIC,
2606 * sets up and registers the network devices with the kernel and hooks
2607 * the interrupt service routine. It does not prepare the device for
2608 * transmission; this is left to the first time one of the network
2609 * interfaces is brought up (i.e. efx_net_open).
2611 static int __devinit
efx_pci_probe(struct pci_dev
*pci_dev
,
2612 const struct pci_device_id
*entry
)
2614 const struct efx_nic_type
*type
= (const struct efx_nic_type
*) entry
->driver_data
;
2615 struct net_device
*net_dev
;
2616 struct efx_nic
*efx
;
2619 /* Allocate and initialise a struct net_device and struct efx_nic */
2620 net_dev
= alloc_etherdev_mqs(sizeof(*efx
), EFX_MAX_CORE_TX_QUEUES
,
2624 net_dev
->features
|= (type
->offload_features
| NETIF_F_SG
|
2625 NETIF_F_HIGHDMA
| NETIF_F_TSO
|
2627 if (type
->offload_features
& NETIF_F_V6_CSUM
)
2628 net_dev
->features
|= NETIF_F_TSO6
;
2629 /* Mask for features that also apply to VLAN devices */
2630 net_dev
->vlan_features
|= (NETIF_F_ALL_CSUM
| NETIF_F_SG
|
2631 NETIF_F_HIGHDMA
| NETIF_F_ALL_TSO
|
2633 /* All offloads can be toggled */
2634 net_dev
->hw_features
= net_dev
->features
& ~NETIF_F_HIGHDMA
;
2635 efx
= netdev_priv(net_dev
);
2636 pci_set_drvdata(pci_dev
, efx
);
2637 SET_NETDEV_DEV(net_dev
, &pci_dev
->dev
);
2638 rc
= efx_init_struct(efx
, type
, pci_dev
, net_dev
);
2642 netif_info(efx
, probe
, efx
->net_dev
,
2643 "Solarflare NIC detected\n");
2645 efx_print_product_vpd(efx
);
2647 /* Set up basic I/O (BAR mappings etc) */
2648 rc
= efx_init_io(efx
);
2652 rc
= efx_pci_probe_main(efx
);
2654 /* Serialise against efx_reset(). No more resets will be
2655 * scheduled since efx_stop_all() has been called, and we have
2656 * not and never have been registered.
2658 cancel_work_sync(&efx
->reset_work
);
2663 /* If there was a scheduled reset during probe, the NIC is
2664 * probably hosed anyway.
2666 if (efx
->reset_pending
) {
2671 /* Switch to the running state before we expose the device to the OS,
2672 * so that dev_open()|efx_start_all() will actually start the device */
2673 efx
->state
= STATE_RUNNING
;
2675 rc
= efx_register_netdev(efx
);
2679 rc
= efx_sriov_init(efx
);
2681 netif_err(efx
, probe
, efx
->net_dev
,
2682 "SR-IOV can't be enabled rc %d\n", rc
);
2684 netif_dbg(efx
, probe
, efx
->net_dev
, "initialisation successful\n");
2686 /* Try to create MTDs, but allow this to fail */
2688 rc
= efx_mtd_probe(efx
);
2691 netif_warn(efx
, probe
, efx
->net_dev
,
2692 "failed to create MTDs (%d)\n", rc
);
2697 efx_pci_remove_main(efx
);
2701 efx_fini_struct(efx
);
2703 pci_set_drvdata(pci_dev
, NULL
);
2705 netif_dbg(efx
, drv
, efx
->net_dev
, "initialisation failed. rc=%d\n", rc
);
2706 free_netdev(net_dev
);
2710 static int efx_pm_freeze(struct device
*dev
)
2712 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
2714 efx
->state
= STATE_FINI
;
2716 netif_device_detach(efx
->net_dev
);
2719 efx_stop_interrupts(efx
, false);
2724 static int efx_pm_thaw(struct device
*dev
)
2726 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
2728 efx
->state
= STATE_INIT
;
2730 efx_start_interrupts(efx
, false);
2732 mutex_lock(&efx
->mac_lock
);
2733 efx
->phy_op
->reconfigure(efx
);
2734 mutex_unlock(&efx
->mac_lock
);
2738 netif_device_attach(efx
->net_dev
);
2740 efx
->state
= STATE_RUNNING
;
2742 efx
->type
->resume_wol(efx
);
2744 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
2745 queue_work(reset_workqueue
, &efx
->reset_work
);
2750 static int efx_pm_poweroff(struct device
*dev
)
2752 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
2753 struct efx_nic
*efx
= pci_get_drvdata(pci_dev
);
2755 efx
->type
->fini(efx
);
2757 efx
->reset_pending
= 0;
2759 pci_save_state(pci_dev
);
2760 return pci_set_power_state(pci_dev
, PCI_D3hot
);
2763 /* Used for both resume and restore */
2764 static int efx_pm_resume(struct device
*dev
)
2766 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
2767 struct efx_nic
*efx
= pci_get_drvdata(pci_dev
);
2770 rc
= pci_set_power_state(pci_dev
, PCI_D0
);
2773 pci_restore_state(pci_dev
);
2774 rc
= pci_enable_device(pci_dev
);
2777 pci_set_master(efx
->pci_dev
);
2778 rc
= efx
->type
->reset(efx
, RESET_TYPE_ALL
);
2781 rc
= efx
->type
->init(efx
);
2788 static int efx_pm_suspend(struct device
*dev
)
2793 rc
= efx_pm_poweroff(dev
);
2799 static const struct dev_pm_ops efx_pm_ops
= {
2800 .suspend
= efx_pm_suspend
,
2801 .resume
= efx_pm_resume
,
2802 .freeze
= efx_pm_freeze
,
2803 .thaw
= efx_pm_thaw
,
2804 .poweroff
= efx_pm_poweroff
,
2805 .restore
= efx_pm_resume
,
2808 static struct pci_driver efx_pci_driver
= {
2809 .name
= KBUILD_MODNAME
,
2810 .id_table
= efx_pci_table
,
2811 .probe
= efx_pci_probe
,
2812 .remove
= efx_pci_remove
,
2813 .driver
.pm
= &efx_pm_ops
,
2816 /**************************************************************************
2818 * Kernel module interface
2820 *************************************************************************/
2822 module_param(interrupt_mode
, uint
, 0444);
2823 MODULE_PARM_DESC(interrupt_mode
,
2824 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
2826 static int __init
efx_init_module(void)
2830 printk(KERN_INFO
"Solarflare NET driver v" EFX_DRIVER_VERSION
"\n");
2832 rc
= register_netdevice_notifier(&efx_netdev_notifier
);
2836 rc
= efx_init_sriov();
2840 reset_workqueue
= create_singlethread_workqueue("sfc_reset");
2841 if (!reset_workqueue
) {
2846 rc
= pci_register_driver(&efx_pci_driver
);
2853 destroy_workqueue(reset_workqueue
);
2857 unregister_netdevice_notifier(&efx_netdev_notifier
);
2862 static void __exit
efx_exit_module(void)
2864 printk(KERN_INFO
"Solarflare NET driver unloading\n");
2866 pci_unregister_driver(&efx_pci_driver
);
2867 destroy_workqueue(reset_workqueue
);
2869 unregister_netdevice_notifier(&efx_netdev_notifier
);
2873 module_init(efx_init_module
);
2874 module_exit(efx_exit_module
);
2876 MODULE_AUTHOR("Solarflare Communications and "
2877 "Michael Brown <mbrown@fensystems.co.uk>");
2878 MODULE_DESCRIPTION("Solarflare Communications network driver");
2879 MODULE_LICENSE("GPL");
2880 MODULE_DEVICE_TABLE(pci
, efx_pci_table
);