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"
30 #include "workarounds.h"
32 /**************************************************************************
36 **************************************************************************
39 /* Loopback mode names (see LOOPBACK_MODE()) */
40 const unsigned int efx_loopback_mode_max
= LOOPBACK_MAX
;
41 const char *const efx_loopback_mode_names
[] = {
42 [LOOPBACK_NONE
] = "NONE",
43 [LOOPBACK_DATA
] = "DATAPATH",
44 [LOOPBACK_GMAC
] = "GMAC",
45 [LOOPBACK_XGMII
] = "XGMII",
46 [LOOPBACK_XGXS
] = "XGXS",
47 [LOOPBACK_XAUI
] = "XAUI",
48 [LOOPBACK_GMII
] = "GMII",
49 [LOOPBACK_SGMII
] = "SGMII",
50 [LOOPBACK_XGBR
] = "XGBR",
51 [LOOPBACK_XFI
] = "XFI",
52 [LOOPBACK_XAUI_FAR
] = "XAUI_FAR",
53 [LOOPBACK_GMII_FAR
] = "GMII_FAR",
54 [LOOPBACK_SGMII_FAR
] = "SGMII_FAR",
55 [LOOPBACK_XFI_FAR
] = "XFI_FAR",
56 [LOOPBACK_GPHY
] = "GPHY",
57 [LOOPBACK_PHYXS
] = "PHYXS",
58 [LOOPBACK_PCS
] = "PCS",
59 [LOOPBACK_PMAPMD
] = "PMA/PMD",
60 [LOOPBACK_XPORT
] = "XPORT",
61 [LOOPBACK_XGMII_WS
] = "XGMII_WS",
62 [LOOPBACK_XAUI_WS
] = "XAUI_WS",
63 [LOOPBACK_XAUI_WS_FAR
] = "XAUI_WS_FAR",
64 [LOOPBACK_XAUI_WS_NEAR
] = "XAUI_WS_NEAR",
65 [LOOPBACK_GMII_WS
] = "GMII_WS",
66 [LOOPBACK_XFI_WS
] = "XFI_WS",
67 [LOOPBACK_XFI_WS_FAR
] = "XFI_WS_FAR",
68 [LOOPBACK_PHYXS_WS
] = "PHYXS_WS",
71 const unsigned int efx_reset_type_max
= RESET_TYPE_MAX
;
72 const char *const efx_reset_type_names
[] = {
73 [RESET_TYPE_INVISIBLE
] = "INVISIBLE",
74 [RESET_TYPE_ALL
] = "ALL",
75 [RESET_TYPE_WORLD
] = "WORLD",
76 [RESET_TYPE_DISABLE
] = "DISABLE",
77 [RESET_TYPE_TX_WATCHDOG
] = "TX_WATCHDOG",
78 [RESET_TYPE_INT_ERROR
] = "INT_ERROR",
79 [RESET_TYPE_RX_RECOVERY
] = "RX_RECOVERY",
80 [RESET_TYPE_RX_DESC_FETCH
] = "RX_DESC_FETCH",
81 [RESET_TYPE_TX_DESC_FETCH
] = "TX_DESC_FETCH",
82 [RESET_TYPE_TX_SKIP
] = "TX_SKIP",
83 [RESET_TYPE_MC_FAILURE
] = "MC_FAILURE",
86 #define EFX_MAX_MTU (9 * 1024)
88 /* Reset workqueue. If any NIC has a hardware failure then a reset will be
89 * queued onto this work queue. This is not a per-nic work queue, because
90 * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised.
92 static struct workqueue_struct
*reset_workqueue
;
94 /**************************************************************************
98 *************************************************************************/
101 * Use separate channels for TX and RX events
103 * Set this to 1 to use separate channels for TX and RX. It allows us
104 * to control interrupt affinity separately for TX and RX.
106 * This is only used in MSI-X interrupt mode
108 static unsigned int separate_tx_channels
;
109 module_param(separate_tx_channels
, uint
, 0444);
110 MODULE_PARM_DESC(separate_tx_channels
,
111 "Use separate channels for TX and RX");
113 /* This is the weight assigned to each of the (per-channel) virtual
116 static int napi_weight
= 64;
118 /* This is the time (in jiffies) between invocations of the hardware
119 * monitor. On Falcon-based NICs, this will:
120 * - Check the on-board hardware monitor;
121 * - Poll the link state and reconfigure the hardware as necessary.
123 static unsigned int efx_monitor_interval
= 1 * HZ
;
125 /* Initial interrupt moderation settings. They can be modified after
126 * module load with ethtool.
128 * The default for RX should strike a balance between increasing the
129 * round-trip latency and reducing overhead.
131 static unsigned int rx_irq_mod_usec
= 60;
133 /* Initial interrupt moderation settings. They can be modified after
134 * module load with ethtool.
136 * This default is chosen to ensure that a 10G link does not go idle
137 * while a TX queue is stopped after it has become full. A queue is
138 * restarted when it drops below half full. The time this takes (assuming
139 * worst case 3 descriptors per packet and 1024 descriptors) is
140 * 512 / 3 * 1.2 = 205 usec.
142 static unsigned int tx_irq_mod_usec
= 150;
144 /* This is the first interrupt mode to try out of:
149 static unsigned int interrupt_mode
;
151 /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS),
152 * i.e. the number of CPUs among which we may distribute simultaneous
153 * interrupt handling.
155 * Cards without MSI-X will only target one CPU via legacy or MSI interrupt.
156 * The default (0) means to assign an interrupt to each core.
158 static unsigned int rss_cpus
;
159 module_param(rss_cpus
, uint
, 0444);
160 MODULE_PARM_DESC(rss_cpus
, "Number of CPUs to use for Receive-Side Scaling");
162 static int phy_flash_cfg
;
163 module_param(phy_flash_cfg
, int, 0644);
164 MODULE_PARM_DESC(phy_flash_cfg
, "Set PHYs into reflash mode initially");
166 static unsigned irq_adapt_low_thresh
= 10000;
167 module_param(irq_adapt_low_thresh
, uint
, 0644);
168 MODULE_PARM_DESC(irq_adapt_low_thresh
,
169 "Threshold score for reducing IRQ moderation");
171 static unsigned irq_adapt_high_thresh
= 20000;
172 module_param(irq_adapt_high_thresh
, uint
, 0644);
173 MODULE_PARM_DESC(irq_adapt_high_thresh
,
174 "Threshold score for increasing IRQ moderation");
176 static unsigned debug
= (NETIF_MSG_DRV
| NETIF_MSG_PROBE
|
177 NETIF_MSG_LINK
| NETIF_MSG_IFDOWN
|
178 NETIF_MSG_IFUP
| NETIF_MSG_RX_ERR
|
179 NETIF_MSG_TX_ERR
| NETIF_MSG_HW
);
180 module_param(debug
, uint
, 0);
181 MODULE_PARM_DESC(debug
, "Bitmapped debugging message enable value");
183 /**************************************************************************
185 * Utility functions and prototypes
187 *************************************************************************/
189 static void efx_remove_channels(struct efx_nic
*efx
);
190 static void efx_remove_port(struct efx_nic
*efx
);
191 static void efx_init_napi(struct efx_nic
*efx
);
192 static void efx_fini_napi(struct efx_nic
*efx
);
193 static void efx_fini_napi_channel(struct efx_channel
*channel
);
194 static void efx_fini_struct(struct efx_nic
*efx
);
195 static void efx_start_all(struct efx_nic
*efx
);
196 static void efx_stop_all(struct efx_nic
*efx
);
198 #define EFX_ASSERT_RESET_SERIALISED(efx) \
200 if ((efx->state == STATE_RUNNING) || \
201 (efx->state == STATE_DISABLED)) \
205 /**************************************************************************
207 * Event queue processing
209 *************************************************************************/
211 /* Process channel's event queue
213 * This function is responsible for processing the event queue of a
214 * single channel. The caller must guarantee that this function will
215 * never be concurrently called more than once on the same channel,
216 * though different channels may be being processed concurrently.
218 static int efx_process_channel(struct efx_channel
*channel
, int budget
)
220 struct efx_nic
*efx
= channel
->efx
;
223 if (unlikely(efx
->reset_pending
|| !channel
->enabled
))
226 spent
= efx_nic_process_eventq(channel
, budget
);
227 if (spent
&& efx_channel_has_rx_queue(channel
)) {
228 struct efx_rx_queue
*rx_queue
=
229 efx_channel_get_rx_queue(channel
);
231 /* Deliver last RX packet. */
232 if (channel
->rx_pkt
) {
233 __efx_rx_packet(channel
, channel
->rx_pkt
);
234 channel
->rx_pkt
= NULL
;
237 efx_rx_strategy(channel
);
238 efx_fast_push_rx_descriptors(rx_queue
);
244 /* Mark channel as finished processing
246 * Note that since we will not receive further interrupts for this
247 * channel before we finish processing and call the eventq_read_ack()
248 * method, there is no need to use the interrupt hold-off timers.
250 static inline void efx_channel_processed(struct efx_channel
*channel
)
252 /* The interrupt handler for this channel may set work_pending
253 * as soon as we acknowledge the events we've seen. Make sure
254 * it's cleared before then. */
255 channel
->work_pending
= false;
258 efx_nic_eventq_read_ack(channel
);
263 * NAPI guarantees serialisation of polls of the same device, which
264 * provides the guarantee required by efx_process_channel().
266 static int efx_poll(struct napi_struct
*napi
, int budget
)
268 struct efx_channel
*channel
=
269 container_of(napi
, struct efx_channel
, napi_str
);
270 struct efx_nic
*efx
= channel
->efx
;
273 netif_vdbg(efx
, intr
, efx
->net_dev
,
274 "channel %d NAPI poll executing on CPU %d\n",
275 channel
->channel
, raw_smp_processor_id());
277 spent
= efx_process_channel(channel
, budget
);
279 if (spent
< budget
) {
280 if (channel
->channel
< efx
->n_rx_channels
&&
281 efx
->irq_rx_adaptive
&&
282 unlikely(++channel
->irq_count
== 1000)) {
283 if (unlikely(channel
->irq_mod_score
<
284 irq_adapt_low_thresh
)) {
285 if (channel
->irq_moderation
> 1) {
286 channel
->irq_moderation
-= 1;
287 efx
->type
->push_irq_moderation(channel
);
289 } else if (unlikely(channel
->irq_mod_score
>
290 irq_adapt_high_thresh
)) {
291 if (channel
->irq_moderation
<
292 efx
->irq_rx_moderation
) {
293 channel
->irq_moderation
+= 1;
294 efx
->type
->push_irq_moderation(channel
);
297 channel
->irq_count
= 0;
298 channel
->irq_mod_score
= 0;
301 efx_filter_rfs_expire(channel
);
303 /* There is no race here; although napi_disable() will
304 * only wait for napi_complete(), this isn't a problem
305 * since efx_channel_processed() will have no effect if
306 * interrupts have already been disabled.
309 efx_channel_processed(channel
);
315 /* Process the eventq of the specified channel immediately on this CPU
317 * Disable hardware generated interrupts, wait for any existing
318 * processing to finish, then directly poll (and ack ) the eventq.
319 * Finally reenable NAPI and interrupts.
321 * This is for use only during a loopback self-test. It must not
322 * deliver any packets up the stack as this can result in deadlock.
324 void efx_process_channel_now(struct efx_channel
*channel
)
326 struct efx_nic
*efx
= channel
->efx
;
328 BUG_ON(channel
->channel
>= efx
->n_channels
);
329 BUG_ON(!channel
->enabled
);
330 BUG_ON(!efx
->loopback_selftest
);
332 /* Disable interrupts and wait for ISRs to complete */
333 efx_nic_disable_interrupts(efx
);
334 if (efx
->legacy_irq
) {
335 synchronize_irq(efx
->legacy_irq
);
336 efx
->legacy_irq_enabled
= false;
339 synchronize_irq(channel
->irq
);
341 /* Wait for any NAPI processing to complete */
342 napi_disable(&channel
->napi_str
);
344 /* Poll the channel */
345 efx_process_channel(channel
, channel
->eventq_mask
+ 1);
347 /* Ack the eventq. This may cause an interrupt to be generated
348 * when they are reenabled */
349 efx_channel_processed(channel
);
351 napi_enable(&channel
->napi_str
);
353 efx
->legacy_irq_enabled
= true;
354 efx_nic_enable_interrupts(efx
);
357 /* Create event queue
358 * Event queue memory allocations are done only once. If the channel
359 * is reset, the memory buffer will be reused; this guards against
360 * errors during channel reset and also simplifies interrupt handling.
362 static int efx_probe_eventq(struct efx_channel
*channel
)
364 struct efx_nic
*efx
= channel
->efx
;
365 unsigned long entries
;
367 netif_dbg(efx
, probe
, efx
->net_dev
,
368 "chan %d create event queue\n", channel
->channel
);
370 /* Build an event queue with room for one event per tx and rx buffer,
371 * plus some extra for link state events and MCDI completions. */
372 entries
= roundup_pow_of_two(efx
->rxq_entries
+ efx
->txq_entries
+ 128);
373 EFX_BUG_ON_PARANOID(entries
> EFX_MAX_EVQ_SIZE
);
374 channel
->eventq_mask
= max(entries
, EFX_MIN_EVQ_SIZE
) - 1;
376 return efx_nic_probe_eventq(channel
);
379 /* Prepare channel's event queue */
380 static void efx_init_eventq(struct efx_channel
*channel
)
382 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
383 "chan %d init event queue\n", channel
->channel
);
385 channel
->eventq_read_ptr
= 0;
387 efx_nic_init_eventq(channel
);
390 static void efx_fini_eventq(struct efx_channel
*channel
)
392 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
393 "chan %d fini event queue\n", channel
->channel
);
395 efx_nic_fini_eventq(channel
);
398 static void efx_remove_eventq(struct efx_channel
*channel
)
400 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
401 "chan %d remove event queue\n", channel
->channel
);
403 efx_nic_remove_eventq(channel
);
406 /**************************************************************************
410 *************************************************************************/
412 /* Allocate and initialise a channel structure, optionally copying
413 * parameters (but not resources) from an old channel structure. */
414 static struct efx_channel
*
415 efx_alloc_channel(struct efx_nic
*efx
, int i
, struct efx_channel
*old_channel
)
417 struct efx_channel
*channel
;
418 struct efx_rx_queue
*rx_queue
;
419 struct efx_tx_queue
*tx_queue
;
423 channel
= kmalloc(sizeof(*channel
), GFP_KERNEL
);
427 *channel
= *old_channel
;
429 channel
->napi_dev
= NULL
;
430 memset(&channel
->eventq
, 0, sizeof(channel
->eventq
));
432 rx_queue
= &channel
->rx_queue
;
433 rx_queue
->buffer
= NULL
;
434 memset(&rx_queue
->rxd
, 0, sizeof(rx_queue
->rxd
));
436 for (j
= 0; j
< EFX_TXQ_TYPES
; j
++) {
437 tx_queue
= &channel
->tx_queue
[j
];
438 if (tx_queue
->channel
)
439 tx_queue
->channel
= channel
;
440 tx_queue
->buffer
= NULL
;
441 memset(&tx_queue
->txd
, 0, sizeof(tx_queue
->txd
));
444 channel
= kzalloc(sizeof(*channel
), GFP_KERNEL
);
449 channel
->channel
= i
;
451 for (j
= 0; j
< EFX_TXQ_TYPES
; j
++) {
452 tx_queue
= &channel
->tx_queue
[j
];
454 tx_queue
->queue
= i
* EFX_TXQ_TYPES
+ j
;
455 tx_queue
->channel
= channel
;
459 rx_queue
= &channel
->rx_queue
;
461 setup_timer(&rx_queue
->slow_fill
, efx_rx_slow_fill
,
462 (unsigned long)rx_queue
);
467 static int efx_probe_channel(struct efx_channel
*channel
)
469 struct efx_tx_queue
*tx_queue
;
470 struct efx_rx_queue
*rx_queue
;
473 netif_dbg(channel
->efx
, probe
, channel
->efx
->net_dev
,
474 "creating channel %d\n", channel
->channel
);
476 rc
= efx_probe_eventq(channel
);
480 efx_for_each_channel_tx_queue(tx_queue
, channel
) {
481 rc
= efx_probe_tx_queue(tx_queue
);
486 efx_for_each_channel_rx_queue(rx_queue
, channel
) {
487 rc
= efx_probe_rx_queue(rx_queue
);
492 channel
->n_rx_frm_trunc
= 0;
497 efx_for_each_channel_rx_queue(rx_queue
, channel
)
498 efx_remove_rx_queue(rx_queue
);
500 efx_for_each_channel_tx_queue(tx_queue
, channel
)
501 efx_remove_tx_queue(tx_queue
);
507 static void efx_set_channel_names(struct efx_nic
*efx
)
509 struct efx_channel
*channel
;
510 const char *type
= "";
513 efx_for_each_channel(channel
, efx
) {
514 number
= channel
->channel
;
515 if (efx
->n_channels
> efx
->n_rx_channels
) {
516 if (channel
->channel
< efx
->n_rx_channels
) {
520 number
-= efx
->n_rx_channels
;
523 snprintf(efx
->channel_name
[channel
->channel
],
524 sizeof(efx
->channel_name
[0]),
525 "%s%s-%d", efx
->name
, type
, number
);
529 static int efx_probe_channels(struct efx_nic
*efx
)
531 struct efx_channel
*channel
;
534 /* Restart special buffer allocation */
535 efx
->next_buffer_table
= 0;
537 efx_for_each_channel(channel
, efx
) {
538 rc
= efx_probe_channel(channel
);
540 netif_err(efx
, probe
, efx
->net_dev
,
541 "failed to create channel %d\n",
546 efx_set_channel_names(efx
);
551 efx_remove_channels(efx
);
555 /* Channels are shutdown and reinitialised whilst the NIC is running
556 * to propagate configuration changes (mtu, checksum offload), or
557 * to clear hardware error conditions
559 static void efx_init_channels(struct efx_nic
*efx
)
561 struct efx_tx_queue
*tx_queue
;
562 struct efx_rx_queue
*rx_queue
;
563 struct efx_channel
*channel
;
565 /* Calculate the rx buffer allocation parameters required to
566 * support the current MTU, including padding for header
567 * alignment and overruns.
569 efx
->rx_buffer_len
= (max(EFX_PAGE_IP_ALIGN
, NET_IP_ALIGN
) +
570 EFX_MAX_FRAME_LEN(efx
->net_dev
->mtu
) +
571 efx
->type
->rx_buffer_hash_size
+
572 efx
->type
->rx_buffer_padding
);
573 efx
->rx_buffer_order
= get_order(efx
->rx_buffer_len
+
574 sizeof(struct efx_rx_page_state
));
576 /* Initialise the channels */
577 efx_for_each_channel(channel
, efx
) {
578 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
579 "init chan %d\n", channel
->channel
);
581 efx_init_eventq(channel
);
583 efx_for_each_channel_tx_queue(tx_queue
, channel
)
584 efx_init_tx_queue(tx_queue
);
586 /* The rx buffer allocation strategy is MTU dependent */
587 efx_rx_strategy(channel
);
589 efx_for_each_channel_rx_queue(rx_queue
, channel
)
590 efx_init_rx_queue(rx_queue
);
592 WARN_ON(channel
->rx_pkt
!= NULL
);
593 efx_rx_strategy(channel
);
597 /* This enables event queue processing and packet transmission.
599 * Note that this function is not allowed to fail, since that would
600 * introduce too much complexity into the suspend/resume path.
602 static void efx_start_channel(struct efx_channel
*channel
)
604 struct efx_rx_queue
*rx_queue
;
606 netif_dbg(channel
->efx
, ifup
, channel
->efx
->net_dev
,
607 "starting chan %d\n", channel
->channel
);
609 /* The interrupt handler for this channel may set work_pending
610 * as soon as we enable it. Make sure it's cleared before
611 * then. Similarly, make sure it sees the enabled flag set. */
612 channel
->work_pending
= false;
613 channel
->enabled
= true;
616 /* Fill the queues before enabling NAPI */
617 efx_for_each_channel_rx_queue(rx_queue
, channel
)
618 efx_fast_push_rx_descriptors(rx_queue
);
620 napi_enable(&channel
->napi_str
);
623 /* This disables event queue processing and packet transmission.
624 * This function does not guarantee that all queue processing
625 * (e.g. RX refill) is complete.
627 static void efx_stop_channel(struct efx_channel
*channel
)
629 if (!channel
->enabled
)
632 netif_dbg(channel
->efx
, ifdown
, channel
->efx
->net_dev
,
633 "stop chan %d\n", channel
->channel
);
635 channel
->enabled
= false;
636 napi_disable(&channel
->napi_str
);
639 static void efx_fini_channels(struct efx_nic
*efx
)
641 struct efx_channel
*channel
;
642 struct efx_tx_queue
*tx_queue
;
643 struct efx_rx_queue
*rx_queue
;
646 EFX_ASSERT_RESET_SERIALISED(efx
);
647 BUG_ON(efx
->port_enabled
);
649 rc
= efx_nic_flush_queues(efx
);
650 if (rc
&& EFX_WORKAROUND_7803(efx
)) {
651 /* Schedule a reset to recover from the flush failure. The
652 * descriptor caches reference memory we're about to free,
653 * but falcon_reconfigure_mac_wrapper() won't reconnect
654 * the MACs because of the pending reset. */
655 netif_err(efx
, drv
, efx
->net_dev
,
656 "Resetting to recover from flush failure\n");
657 efx_schedule_reset(efx
, RESET_TYPE_ALL
);
659 netif_err(efx
, drv
, efx
->net_dev
, "failed to flush queues\n");
661 netif_dbg(efx
, drv
, efx
->net_dev
,
662 "successfully flushed all queues\n");
665 efx_for_each_channel(channel
, efx
) {
666 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
667 "shut down chan %d\n", channel
->channel
);
669 efx_for_each_channel_rx_queue(rx_queue
, channel
)
670 efx_fini_rx_queue(rx_queue
);
671 efx_for_each_possible_channel_tx_queue(tx_queue
, channel
)
672 efx_fini_tx_queue(tx_queue
);
673 efx_fini_eventq(channel
);
677 static void efx_remove_channel(struct efx_channel
*channel
)
679 struct efx_tx_queue
*tx_queue
;
680 struct efx_rx_queue
*rx_queue
;
682 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
683 "destroy chan %d\n", channel
->channel
);
685 efx_for_each_channel_rx_queue(rx_queue
, channel
)
686 efx_remove_rx_queue(rx_queue
);
687 efx_for_each_possible_channel_tx_queue(tx_queue
, channel
)
688 efx_remove_tx_queue(tx_queue
);
689 efx_remove_eventq(channel
);
692 static void efx_remove_channels(struct efx_nic
*efx
)
694 struct efx_channel
*channel
;
696 efx_for_each_channel(channel
, efx
)
697 efx_remove_channel(channel
);
701 efx_realloc_channels(struct efx_nic
*efx
, u32 rxq_entries
, u32 txq_entries
)
703 struct efx_channel
*other_channel
[EFX_MAX_CHANNELS
], *channel
;
704 u32 old_rxq_entries
, old_txq_entries
;
709 efx_fini_channels(efx
);
712 memset(other_channel
, 0, sizeof(other_channel
));
713 for (i
= 0; i
< efx
->n_channels
; i
++) {
714 channel
= efx_alloc_channel(efx
, i
, efx
->channel
[i
]);
719 other_channel
[i
] = channel
;
722 /* Swap entry counts and channel pointers */
723 old_rxq_entries
= efx
->rxq_entries
;
724 old_txq_entries
= efx
->txq_entries
;
725 efx
->rxq_entries
= rxq_entries
;
726 efx
->txq_entries
= txq_entries
;
727 for (i
= 0; i
< efx
->n_channels
; i
++) {
728 channel
= efx
->channel
[i
];
729 efx
->channel
[i
] = other_channel
[i
];
730 other_channel
[i
] = channel
;
733 rc
= efx_probe_channels(efx
);
739 /* Destroy old channels */
740 for (i
= 0; i
< efx
->n_channels
; i
++) {
741 efx_fini_napi_channel(other_channel
[i
]);
742 efx_remove_channel(other_channel
[i
]);
745 /* Free unused channel structures */
746 for (i
= 0; i
< efx
->n_channels
; i
++)
747 kfree(other_channel
[i
]);
749 efx_init_channels(efx
);
755 efx
->rxq_entries
= old_rxq_entries
;
756 efx
->txq_entries
= old_txq_entries
;
757 for (i
= 0; i
< efx
->n_channels
; i
++) {
758 channel
= efx
->channel
[i
];
759 efx
->channel
[i
] = other_channel
[i
];
760 other_channel
[i
] = channel
;
765 void efx_schedule_slow_fill(struct efx_rx_queue
*rx_queue
)
767 mod_timer(&rx_queue
->slow_fill
, jiffies
+ msecs_to_jiffies(100));
770 /**************************************************************************
774 **************************************************************************/
776 /* This ensures that the kernel is kept informed (via
777 * netif_carrier_on/off) of the link status, and also maintains the
778 * link status's stop on the port's TX queue.
780 void efx_link_status_changed(struct efx_nic
*efx
)
782 struct efx_link_state
*link_state
= &efx
->link_state
;
784 /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
785 * that no events are triggered between unregister_netdev() and the
786 * driver unloading. A more general condition is that NETDEV_CHANGE
787 * can only be generated between NETDEV_UP and NETDEV_DOWN */
788 if (!netif_running(efx
->net_dev
))
791 if (link_state
->up
!= netif_carrier_ok(efx
->net_dev
)) {
792 efx
->n_link_state_changes
++;
795 netif_carrier_on(efx
->net_dev
);
797 netif_carrier_off(efx
->net_dev
);
800 /* Status message for kernel log */
802 netif_info(efx
, link
, efx
->net_dev
,
803 "link up at %uMbps %s-duplex (MTU %d)%s\n",
804 link_state
->speed
, link_state
->fd
? "full" : "half",
806 (efx
->promiscuous
? " [PROMISC]" : ""));
808 netif_info(efx
, link
, efx
->net_dev
, "link down\n");
811 void efx_link_set_advertising(struct efx_nic
*efx
, u32 advertising
)
813 efx
->link_advertising
= advertising
;
815 if (advertising
& ADVERTISED_Pause
)
816 efx
->wanted_fc
|= (EFX_FC_TX
| EFX_FC_RX
);
818 efx
->wanted_fc
&= ~(EFX_FC_TX
| EFX_FC_RX
);
819 if (advertising
& ADVERTISED_Asym_Pause
)
820 efx
->wanted_fc
^= EFX_FC_TX
;
824 void efx_link_set_wanted_fc(struct efx_nic
*efx
, u8 wanted_fc
)
826 efx
->wanted_fc
= wanted_fc
;
827 if (efx
->link_advertising
) {
828 if (wanted_fc
& EFX_FC_RX
)
829 efx
->link_advertising
|= (ADVERTISED_Pause
|
830 ADVERTISED_Asym_Pause
);
832 efx
->link_advertising
&= ~(ADVERTISED_Pause
|
833 ADVERTISED_Asym_Pause
);
834 if (wanted_fc
& EFX_FC_TX
)
835 efx
->link_advertising
^= ADVERTISED_Asym_Pause
;
839 static void efx_fini_port(struct efx_nic
*efx
);
841 /* Push loopback/power/transmit disable settings to the PHY, and reconfigure
842 * the MAC appropriately. All other PHY configuration changes are pushed
843 * through phy_op->set_settings(), and pushed asynchronously to the MAC
844 * through efx_monitor().
846 * Callers must hold the mac_lock
848 int __efx_reconfigure_port(struct efx_nic
*efx
)
850 enum efx_phy_mode phy_mode
;
853 WARN_ON(!mutex_is_locked(&efx
->mac_lock
));
855 /* Serialise the promiscuous flag with efx_set_rx_mode. */
856 netif_addr_lock_bh(efx
->net_dev
);
857 netif_addr_unlock_bh(efx
->net_dev
);
859 /* Disable PHY transmit in mac level loopbacks */
860 phy_mode
= efx
->phy_mode
;
861 if (LOOPBACK_INTERNAL(efx
))
862 efx
->phy_mode
|= PHY_MODE_TX_DISABLED
;
864 efx
->phy_mode
&= ~PHY_MODE_TX_DISABLED
;
866 rc
= efx
->type
->reconfigure_port(efx
);
869 efx
->phy_mode
= phy_mode
;
874 /* Reinitialise the MAC to pick up new PHY settings, even if the port is
876 int efx_reconfigure_port(struct efx_nic
*efx
)
880 EFX_ASSERT_RESET_SERIALISED(efx
);
882 mutex_lock(&efx
->mac_lock
);
883 rc
= __efx_reconfigure_port(efx
);
884 mutex_unlock(&efx
->mac_lock
);
889 /* Asynchronous work item for changing MAC promiscuity and multicast
890 * hash. Avoid a drain/rx_ingress enable by reconfiguring the current
892 static void efx_mac_work(struct work_struct
*data
)
894 struct efx_nic
*efx
= container_of(data
, struct efx_nic
, mac_work
);
896 mutex_lock(&efx
->mac_lock
);
897 if (efx
->port_enabled
)
898 efx
->type
->reconfigure_mac(efx
);
899 mutex_unlock(&efx
->mac_lock
);
902 static int efx_probe_port(struct efx_nic
*efx
)
906 netif_dbg(efx
, probe
, efx
->net_dev
, "create port\n");
909 efx
->phy_mode
= PHY_MODE_SPECIAL
;
911 /* Connect up MAC/PHY operations table */
912 rc
= efx
->type
->probe_port(efx
);
916 /* Initialise MAC address to permanent address */
917 memcpy(efx
->net_dev
->dev_addr
, efx
->net_dev
->perm_addr
, ETH_ALEN
);
922 static int efx_init_port(struct efx_nic
*efx
)
926 netif_dbg(efx
, drv
, efx
->net_dev
, "init port\n");
928 mutex_lock(&efx
->mac_lock
);
930 rc
= efx
->phy_op
->init(efx
);
934 efx
->port_initialized
= true;
936 /* Reconfigure the MAC before creating dma queues (required for
937 * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */
938 efx
->type
->reconfigure_mac(efx
);
940 /* Ensure the PHY advertises the correct flow control settings */
941 rc
= efx
->phy_op
->reconfigure(efx
);
945 mutex_unlock(&efx
->mac_lock
);
949 efx
->phy_op
->fini(efx
);
951 mutex_unlock(&efx
->mac_lock
);
955 static void efx_start_port(struct efx_nic
*efx
)
957 netif_dbg(efx
, ifup
, efx
->net_dev
, "start port\n");
958 BUG_ON(efx
->port_enabled
);
960 mutex_lock(&efx
->mac_lock
);
961 efx
->port_enabled
= true;
963 /* efx_mac_work() might have been scheduled after efx_stop_port(),
964 * and then cancelled by efx_flush_all() */
965 efx
->type
->reconfigure_mac(efx
);
967 mutex_unlock(&efx
->mac_lock
);
970 /* Prevent efx_mac_work() and efx_monitor() from working */
971 static void efx_stop_port(struct efx_nic
*efx
)
973 netif_dbg(efx
, ifdown
, efx
->net_dev
, "stop port\n");
975 mutex_lock(&efx
->mac_lock
);
976 efx
->port_enabled
= false;
977 mutex_unlock(&efx
->mac_lock
);
979 /* Serialise against efx_set_multicast_list() */
980 netif_addr_lock_bh(efx
->net_dev
);
981 netif_addr_unlock_bh(efx
->net_dev
);
984 static void efx_fini_port(struct efx_nic
*efx
)
986 netif_dbg(efx
, drv
, efx
->net_dev
, "shut down port\n");
988 if (!efx
->port_initialized
)
991 efx
->phy_op
->fini(efx
);
992 efx
->port_initialized
= false;
994 efx
->link_state
.up
= false;
995 efx_link_status_changed(efx
);
998 static void efx_remove_port(struct efx_nic
*efx
)
1000 netif_dbg(efx
, drv
, efx
->net_dev
, "destroying port\n");
1002 efx
->type
->remove_port(efx
);
1005 /**************************************************************************
1009 **************************************************************************/
1011 /* This configures the PCI device to enable I/O and DMA. */
1012 static int efx_init_io(struct efx_nic
*efx
)
1014 struct pci_dev
*pci_dev
= efx
->pci_dev
;
1015 dma_addr_t dma_mask
= efx
->type
->max_dma_mask
;
1018 netif_dbg(efx
, probe
, efx
->net_dev
, "initialising I/O\n");
1020 rc
= pci_enable_device(pci_dev
);
1022 netif_err(efx
, probe
, efx
->net_dev
,
1023 "failed to enable PCI device\n");
1027 pci_set_master(pci_dev
);
1029 /* Set the PCI DMA mask. Try all possibilities from our
1030 * genuine mask down to 32 bits, because some architectures
1031 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
1032 * masks event though they reject 46 bit masks.
1034 while (dma_mask
> 0x7fffffffUL
) {
1035 if (pci_dma_supported(pci_dev
, dma_mask
)) {
1036 rc
= pci_set_dma_mask(pci_dev
, dma_mask
);
1043 netif_err(efx
, probe
, efx
->net_dev
,
1044 "could not find a suitable DMA mask\n");
1047 netif_dbg(efx
, probe
, efx
->net_dev
,
1048 "using DMA mask %llx\n", (unsigned long long) dma_mask
);
1049 rc
= pci_set_consistent_dma_mask(pci_dev
, dma_mask
);
1051 /* pci_set_consistent_dma_mask() is not *allowed* to
1052 * fail with a mask that pci_set_dma_mask() accepted,
1053 * but just in case...
1055 netif_err(efx
, probe
, efx
->net_dev
,
1056 "failed to set consistent DMA mask\n");
1060 efx
->membase_phys
= pci_resource_start(efx
->pci_dev
, EFX_MEM_BAR
);
1061 rc
= pci_request_region(pci_dev
, EFX_MEM_BAR
, "sfc");
1063 netif_err(efx
, probe
, efx
->net_dev
,
1064 "request for memory BAR failed\n");
1068 efx
->membase
= ioremap_nocache(efx
->membase_phys
,
1069 efx
->type
->mem_map_size
);
1070 if (!efx
->membase
) {
1071 netif_err(efx
, probe
, efx
->net_dev
,
1072 "could not map memory BAR at %llx+%x\n",
1073 (unsigned long long)efx
->membase_phys
,
1074 efx
->type
->mem_map_size
);
1078 netif_dbg(efx
, probe
, efx
->net_dev
,
1079 "memory BAR at %llx+%x (virtual %p)\n",
1080 (unsigned long long)efx
->membase_phys
,
1081 efx
->type
->mem_map_size
, efx
->membase
);
1086 pci_release_region(efx
->pci_dev
, EFX_MEM_BAR
);
1088 efx
->membase_phys
= 0;
1090 pci_disable_device(efx
->pci_dev
);
1095 static void efx_fini_io(struct efx_nic
*efx
)
1097 netif_dbg(efx
, drv
, efx
->net_dev
, "shutting down I/O\n");
1100 iounmap(efx
->membase
);
1101 efx
->membase
= NULL
;
1104 if (efx
->membase_phys
) {
1105 pci_release_region(efx
->pci_dev
, EFX_MEM_BAR
);
1106 efx
->membase_phys
= 0;
1109 pci_disable_device(efx
->pci_dev
);
1112 static int efx_wanted_parallelism(void)
1114 cpumask_var_t thread_mask
;
1121 if (unlikely(!zalloc_cpumask_var(&thread_mask
, GFP_KERNEL
))) {
1123 "sfc: RSS disabled due to allocation failure\n");
1128 for_each_online_cpu(cpu
) {
1129 if (!cpumask_test_cpu(cpu
, thread_mask
)) {
1131 cpumask_or(thread_mask
, thread_mask
,
1132 topology_thread_cpumask(cpu
));
1136 free_cpumask_var(thread_mask
);
1141 efx_init_rx_cpu_rmap(struct efx_nic
*efx
, struct msix_entry
*xentries
)
1143 #ifdef CONFIG_RFS_ACCEL
1146 efx
->net_dev
->rx_cpu_rmap
= alloc_irq_cpu_rmap(efx
->n_rx_channels
);
1147 if (!efx
->net_dev
->rx_cpu_rmap
)
1149 for (i
= 0; i
< efx
->n_rx_channels
; i
++) {
1150 rc
= irq_cpu_rmap_add(efx
->net_dev
->rx_cpu_rmap
,
1151 xentries
[i
].vector
);
1153 free_irq_cpu_rmap(efx
->net_dev
->rx_cpu_rmap
);
1154 efx
->net_dev
->rx_cpu_rmap
= NULL
;
1162 /* Probe the number and type of interrupts we are able to obtain, and
1163 * the resulting numbers of channels and RX queues.
1165 static int efx_probe_interrupts(struct efx_nic
*efx
)
1168 min_t(int, efx
->type
->phys_addr_channels
, EFX_MAX_CHANNELS
);
1171 if (efx
->interrupt_mode
== EFX_INT_MODE_MSIX
) {
1172 struct msix_entry xentries
[EFX_MAX_CHANNELS
];
1175 n_channels
= efx_wanted_parallelism();
1176 if (separate_tx_channels
)
1178 n_channels
= min(n_channels
, max_channels
);
1180 for (i
= 0; i
< n_channels
; i
++)
1181 xentries
[i
].entry
= i
;
1182 rc
= pci_enable_msix(efx
->pci_dev
, xentries
, n_channels
);
1184 netif_err(efx
, drv
, efx
->net_dev
,
1185 "WARNING: Insufficient MSI-X vectors"
1186 " available (%d < %d).\n", rc
, n_channels
);
1187 netif_err(efx
, drv
, efx
->net_dev
,
1188 "WARNING: Performance may be reduced.\n");
1189 EFX_BUG_ON_PARANOID(rc
>= n_channels
);
1191 rc
= pci_enable_msix(efx
->pci_dev
, xentries
,
1196 efx
->n_channels
= n_channels
;
1197 if (separate_tx_channels
) {
1198 efx
->n_tx_channels
=
1199 max(efx
->n_channels
/ 2, 1U);
1200 efx
->n_rx_channels
=
1201 max(efx
->n_channels
-
1202 efx
->n_tx_channels
, 1U);
1204 efx
->n_tx_channels
= efx
->n_channels
;
1205 efx
->n_rx_channels
= efx
->n_channels
;
1207 rc
= efx_init_rx_cpu_rmap(efx
, xentries
);
1209 pci_disable_msix(efx
->pci_dev
);
1212 for (i
= 0; i
< n_channels
; i
++)
1213 efx_get_channel(efx
, i
)->irq
=
1216 /* Fall back to single channel MSI */
1217 efx
->interrupt_mode
= EFX_INT_MODE_MSI
;
1218 netif_err(efx
, drv
, efx
->net_dev
,
1219 "could not enable MSI-X\n");
1223 /* Try single interrupt MSI */
1224 if (efx
->interrupt_mode
== EFX_INT_MODE_MSI
) {
1225 efx
->n_channels
= 1;
1226 efx
->n_rx_channels
= 1;
1227 efx
->n_tx_channels
= 1;
1228 rc
= pci_enable_msi(efx
->pci_dev
);
1230 efx_get_channel(efx
, 0)->irq
= efx
->pci_dev
->irq
;
1232 netif_err(efx
, drv
, efx
->net_dev
,
1233 "could not enable MSI\n");
1234 efx
->interrupt_mode
= EFX_INT_MODE_LEGACY
;
1238 /* Assume legacy interrupts */
1239 if (efx
->interrupt_mode
== EFX_INT_MODE_LEGACY
) {
1240 efx
->n_channels
= 1 + (separate_tx_channels
? 1 : 0);
1241 efx
->n_rx_channels
= 1;
1242 efx
->n_tx_channels
= 1;
1243 efx
->legacy_irq
= efx
->pci_dev
->irq
;
1249 static void efx_remove_interrupts(struct efx_nic
*efx
)
1251 struct efx_channel
*channel
;
1253 /* Remove MSI/MSI-X interrupts */
1254 efx_for_each_channel(channel
, efx
)
1256 pci_disable_msi(efx
->pci_dev
);
1257 pci_disable_msix(efx
->pci_dev
);
1259 /* Remove legacy interrupt */
1260 efx
->legacy_irq
= 0;
1263 static void efx_set_channels(struct efx_nic
*efx
)
1265 struct efx_channel
*channel
;
1266 struct efx_tx_queue
*tx_queue
;
1268 efx
->tx_channel_offset
=
1269 separate_tx_channels
? efx
->n_channels
- efx
->n_tx_channels
: 0;
1271 /* We need to adjust the TX queue numbers if we have separate
1272 * RX-only and TX-only channels.
1274 efx_for_each_channel(channel
, efx
) {
1275 efx_for_each_channel_tx_queue(tx_queue
, channel
)
1276 tx_queue
->queue
-= (efx
->tx_channel_offset
*
1281 static int efx_probe_nic(struct efx_nic
*efx
)
1286 netif_dbg(efx
, probe
, efx
->net_dev
, "creating NIC\n");
1288 /* Carry out hardware-type specific initialisation */
1289 rc
= efx
->type
->probe(efx
);
1293 /* Determine the number of channels and queues by trying to hook
1294 * in MSI-X interrupts. */
1295 rc
= efx_probe_interrupts(efx
);
1299 if (efx
->n_channels
> 1)
1300 get_random_bytes(&efx
->rx_hash_key
, sizeof(efx
->rx_hash_key
));
1301 for (i
= 0; i
< ARRAY_SIZE(efx
->rx_indir_table
); i
++)
1302 efx
->rx_indir_table
[i
] =
1303 ethtool_rxfh_indir_default(i
, efx
->n_rx_channels
);
1305 efx_set_channels(efx
);
1306 netif_set_real_num_tx_queues(efx
->net_dev
, efx
->n_tx_channels
);
1307 netif_set_real_num_rx_queues(efx
->net_dev
, efx
->n_rx_channels
);
1309 /* Initialise the interrupt moderation settings */
1310 efx_init_irq_moderation(efx
, tx_irq_mod_usec
, rx_irq_mod_usec
, true,
1316 efx
->type
->remove(efx
);
1320 static void efx_remove_nic(struct efx_nic
*efx
)
1322 netif_dbg(efx
, drv
, efx
->net_dev
, "destroying NIC\n");
1324 efx_remove_interrupts(efx
);
1325 efx
->type
->remove(efx
);
1328 /**************************************************************************
1330 * NIC startup/shutdown
1332 *************************************************************************/
1334 static int efx_probe_all(struct efx_nic
*efx
)
1338 rc
= efx_probe_nic(efx
);
1340 netif_err(efx
, probe
, efx
->net_dev
, "failed to create NIC\n");
1344 rc
= efx_probe_port(efx
);
1346 netif_err(efx
, probe
, efx
->net_dev
, "failed to create port\n");
1350 efx
->rxq_entries
= efx
->txq_entries
= EFX_DEFAULT_DMAQ_SIZE
;
1351 rc
= efx_probe_channels(efx
);
1355 rc
= efx_probe_filters(efx
);
1357 netif_err(efx
, probe
, efx
->net_dev
,
1358 "failed to create filter tables\n");
1365 efx_remove_channels(efx
);
1367 efx_remove_port(efx
);
1369 efx_remove_nic(efx
);
1374 /* Called after previous invocation(s) of efx_stop_all, restarts the
1375 * port, kernel transmit queue, NAPI processing and hardware interrupts,
1376 * and ensures that the port is scheduled to be reconfigured.
1377 * This function is safe to call multiple times when the NIC is in any
1379 static void efx_start_all(struct efx_nic
*efx
)
1381 struct efx_channel
*channel
;
1383 EFX_ASSERT_RESET_SERIALISED(efx
);
1385 /* Check that it is appropriate to restart the interface. All
1386 * of these flags are safe to read under just the rtnl lock */
1387 if (efx
->port_enabled
)
1389 if ((efx
->state
!= STATE_RUNNING
) && (efx
->state
!= STATE_INIT
))
1391 if (!netif_running(efx
->net_dev
))
1394 /* Mark the port as enabled so port reconfigurations can start, then
1395 * restart the transmit interface early so the watchdog timer stops */
1396 efx_start_port(efx
);
1398 if (netif_device_present(efx
->net_dev
))
1399 netif_tx_wake_all_queues(efx
->net_dev
);
1401 efx_for_each_channel(channel
, efx
)
1402 efx_start_channel(channel
);
1404 if (efx
->legacy_irq
)
1405 efx
->legacy_irq_enabled
= true;
1406 efx_nic_enable_interrupts(efx
);
1408 /* Switch to event based MCDI completions after enabling interrupts.
1409 * If a reset has been scheduled, then we need to stay in polled mode.
1410 * Rather than serialising efx_mcdi_mode_event() [which sleeps] and
1411 * reset_pending [modified from an atomic context], we instead guarantee
1412 * that efx_mcdi_mode_poll() isn't reverted erroneously */
1413 efx_mcdi_mode_event(efx
);
1414 if (efx
->reset_pending
)
1415 efx_mcdi_mode_poll(efx
);
1417 /* Start the hardware monitor if there is one. Otherwise (we're link
1418 * event driven), we have to poll the PHY because after an event queue
1419 * flush, we could have a missed a link state change */
1420 if (efx
->type
->monitor
!= NULL
) {
1421 queue_delayed_work(efx
->workqueue
, &efx
->monitor_work
,
1422 efx_monitor_interval
);
1424 mutex_lock(&efx
->mac_lock
);
1425 if (efx
->phy_op
->poll(efx
))
1426 efx_link_status_changed(efx
);
1427 mutex_unlock(&efx
->mac_lock
);
1430 efx
->type
->start_stats(efx
);
1433 /* Flush all delayed work. Should only be called when no more delayed work
1434 * will be scheduled. This doesn't flush pending online resets (efx_reset),
1435 * since we're holding the rtnl_lock at this point. */
1436 static void efx_flush_all(struct efx_nic
*efx
)
1438 /* Make sure the hardware monitor is stopped */
1439 cancel_delayed_work_sync(&efx
->monitor_work
);
1440 /* Stop scheduled port reconfigurations */
1441 cancel_work_sync(&efx
->mac_work
);
1444 /* Quiesce hardware and software without bringing the link down.
1445 * Safe to call multiple times, when the nic and interface is in any
1446 * state. The caller is guaranteed to subsequently be in a position
1447 * to modify any hardware and software state they see fit without
1449 static void efx_stop_all(struct efx_nic
*efx
)
1451 struct efx_channel
*channel
;
1453 EFX_ASSERT_RESET_SERIALISED(efx
);
1455 /* port_enabled can be read safely under the rtnl lock */
1456 if (!efx
->port_enabled
)
1459 efx
->type
->stop_stats(efx
);
1461 /* Switch to MCDI polling on Siena before disabling interrupts */
1462 efx_mcdi_mode_poll(efx
);
1464 /* Disable interrupts and wait for ISR to complete */
1465 efx_nic_disable_interrupts(efx
);
1466 if (efx
->legacy_irq
) {
1467 synchronize_irq(efx
->legacy_irq
);
1468 efx
->legacy_irq_enabled
= false;
1470 efx_for_each_channel(channel
, efx
) {
1472 synchronize_irq(channel
->irq
);
1475 /* Stop all NAPI processing and synchronous rx refills */
1476 efx_for_each_channel(channel
, efx
)
1477 efx_stop_channel(channel
);
1479 /* Stop all asynchronous port reconfigurations. Since all
1480 * event processing has already been stopped, there is no
1481 * window to loose phy events */
1484 /* Flush efx_mac_work(), refill_workqueue, monitor_work */
1487 /* Stop the kernel transmit interface late, so the watchdog
1488 * timer isn't ticking over the flush */
1489 netif_tx_stop_all_queues(efx
->net_dev
);
1490 netif_tx_lock_bh(efx
->net_dev
);
1491 netif_tx_unlock_bh(efx
->net_dev
);
1494 static void efx_remove_all(struct efx_nic
*efx
)
1496 efx_remove_filters(efx
);
1497 efx_remove_channels(efx
);
1498 efx_remove_port(efx
);
1499 efx_remove_nic(efx
);
1502 /**************************************************************************
1504 * Interrupt moderation
1506 **************************************************************************/
1508 static unsigned int irq_mod_ticks(unsigned int usecs
, unsigned int quantum_ns
)
1512 if (usecs
* 1000 < quantum_ns
)
1513 return 1; /* never round down to 0 */
1514 return usecs
* 1000 / quantum_ns
;
1517 /* Set interrupt moderation parameters */
1518 int efx_init_irq_moderation(struct efx_nic
*efx
, unsigned int tx_usecs
,
1519 unsigned int rx_usecs
, bool rx_adaptive
,
1520 bool rx_may_override_tx
)
1522 struct efx_channel
*channel
;
1523 unsigned int irq_mod_max
= DIV_ROUND_UP(efx
->type
->timer_period_max
*
1524 efx
->timer_quantum_ns
,
1526 unsigned int tx_ticks
;
1527 unsigned int rx_ticks
;
1529 EFX_ASSERT_RESET_SERIALISED(efx
);
1531 if (tx_usecs
> irq_mod_max
|| rx_usecs
> irq_mod_max
)
1534 tx_ticks
= irq_mod_ticks(tx_usecs
, efx
->timer_quantum_ns
);
1535 rx_ticks
= irq_mod_ticks(rx_usecs
, efx
->timer_quantum_ns
);
1537 if (tx_ticks
!= rx_ticks
&& efx
->tx_channel_offset
== 0 &&
1538 !rx_may_override_tx
) {
1539 netif_err(efx
, drv
, efx
->net_dev
, "Channels are shared. "
1540 "RX and TX IRQ moderation must be equal\n");
1544 efx
->irq_rx_adaptive
= rx_adaptive
;
1545 efx
->irq_rx_moderation
= rx_ticks
;
1546 efx_for_each_channel(channel
, efx
) {
1547 if (efx_channel_has_rx_queue(channel
))
1548 channel
->irq_moderation
= rx_ticks
;
1549 else if (efx_channel_has_tx_queues(channel
))
1550 channel
->irq_moderation
= tx_ticks
;
1556 void efx_get_irq_moderation(struct efx_nic
*efx
, unsigned int *tx_usecs
,
1557 unsigned int *rx_usecs
, bool *rx_adaptive
)
1559 /* We must round up when converting ticks to microseconds
1560 * because we round down when converting the other way.
1563 *rx_adaptive
= efx
->irq_rx_adaptive
;
1564 *rx_usecs
= DIV_ROUND_UP(efx
->irq_rx_moderation
*
1565 efx
->timer_quantum_ns
,
1568 /* If channels are shared between RX and TX, so is IRQ
1569 * moderation. Otherwise, IRQ moderation is the same for all
1570 * TX channels and is not adaptive.
1572 if (efx
->tx_channel_offset
== 0)
1573 *tx_usecs
= *rx_usecs
;
1575 *tx_usecs
= DIV_ROUND_UP(
1576 efx
->channel
[efx
->tx_channel_offset
]->irq_moderation
*
1577 efx
->timer_quantum_ns
,
1581 /**************************************************************************
1585 **************************************************************************/
1587 /* Run periodically off the general workqueue */
1588 static void efx_monitor(struct work_struct
*data
)
1590 struct efx_nic
*efx
= container_of(data
, struct efx_nic
,
1593 netif_vdbg(efx
, timer
, efx
->net_dev
,
1594 "hardware monitor executing on CPU %d\n",
1595 raw_smp_processor_id());
1596 BUG_ON(efx
->type
->monitor
== NULL
);
1598 /* If the mac_lock is already held then it is likely a port
1599 * reconfiguration is already in place, which will likely do
1600 * most of the work of monitor() anyway. */
1601 if (mutex_trylock(&efx
->mac_lock
)) {
1602 if (efx
->port_enabled
)
1603 efx
->type
->monitor(efx
);
1604 mutex_unlock(&efx
->mac_lock
);
1607 queue_delayed_work(efx
->workqueue
, &efx
->monitor_work
,
1608 efx_monitor_interval
);
1611 /**************************************************************************
1615 *************************************************************************/
1618 * Context: process, rtnl_lock() held.
1620 static int efx_ioctl(struct net_device
*net_dev
, struct ifreq
*ifr
, int cmd
)
1622 struct efx_nic
*efx
= netdev_priv(net_dev
);
1623 struct mii_ioctl_data
*data
= if_mii(ifr
);
1625 EFX_ASSERT_RESET_SERIALISED(efx
);
1627 /* Convert phy_id from older PRTAD/DEVAD format */
1628 if ((cmd
== SIOCGMIIREG
|| cmd
== SIOCSMIIREG
) &&
1629 (data
->phy_id
& 0xfc00) == 0x0400)
1630 data
->phy_id
^= MDIO_PHY_ID_C45
| 0x0400;
1632 return mdio_mii_ioctl(&efx
->mdio
, data
, cmd
);
1635 /**************************************************************************
1639 **************************************************************************/
1641 static void efx_init_napi(struct efx_nic
*efx
)
1643 struct efx_channel
*channel
;
1645 efx_for_each_channel(channel
, efx
) {
1646 channel
->napi_dev
= efx
->net_dev
;
1647 netif_napi_add(channel
->napi_dev
, &channel
->napi_str
,
1648 efx_poll
, napi_weight
);
1652 static void efx_fini_napi_channel(struct efx_channel
*channel
)
1654 if (channel
->napi_dev
)
1655 netif_napi_del(&channel
->napi_str
);
1656 channel
->napi_dev
= NULL
;
1659 static void efx_fini_napi(struct efx_nic
*efx
)
1661 struct efx_channel
*channel
;
1663 efx_for_each_channel(channel
, efx
)
1664 efx_fini_napi_channel(channel
);
1667 /**************************************************************************
1669 * Kernel netpoll interface
1671 *************************************************************************/
1673 #ifdef CONFIG_NET_POLL_CONTROLLER
1675 /* Although in the common case interrupts will be disabled, this is not
1676 * guaranteed. However, all our work happens inside the NAPI callback,
1677 * so no locking is required.
1679 static void efx_netpoll(struct net_device
*net_dev
)
1681 struct efx_nic
*efx
= netdev_priv(net_dev
);
1682 struct efx_channel
*channel
;
1684 efx_for_each_channel(channel
, efx
)
1685 efx_schedule_channel(channel
);
1690 /**************************************************************************
1692 * Kernel net device interface
1694 *************************************************************************/
1696 /* Context: process, rtnl_lock() held. */
1697 static int efx_net_open(struct net_device
*net_dev
)
1699 struct efx_nic
*efx
= netdev_priv(net_dev
);
1700 EFX_ASSERT_RESET_SERIALISED(efx
);
1702 netif_dbg(efx
, ifup
, efx
->net_dev
, "opening device on CPU %d\n",
1703 raw_smp_processor_id());
1705 if (efx
->state
== STATE_DISABLED
)
1707 if (efx
->phy_mode
& PHY_MODE_SPECIAL
)
1709 if (efx_mcdi_poll_reboot(efx
) && efx_reset(efx
, RESET_TYPE_ALL
))
1712 /* Notify the kernel of the link state polled during driver load,
1713 * before the monitor starts running */
1714 efx_link_status_changed(efx
);
1720 /* Context: process, rtnl_lock() held.
1721 * Note that the kernel will ignore our return code; this method
1722 * should really be a void.
1724 static int efx_net_stop(struct net_device
*net_dev
)
1726 struct efx_nic
*efx
= netdev_priv(net_dev
);
1728 netif_dbg(efx
, ifdown
, efx
->net_dev
, "closing on CPU %d\n",
1729 raw_smp_processor_id());
1731 if (efx
->state
!= STATE_DISABLED
) {
1732 /* Stop the device and flush all the channels */
1734 efx_fini_channels(efx
);
1735 efx_init_channels(efx
);
1741 /* Context: process, dev_base_lock or RTNL held, non-blocking. */
1742 static struct rtnl_link_stats64
*efx_net_stats(struct net_device
*net_dev
,
1743 struct rtnl_link_stats64
*stats
)
1745 struct efx_nic
*efx
= netdev_priv(net_dev
);
1746 struct efx_mac_stats
*mac_stats
= &efx
->mac_stats
;
1748 spin_lock_bh(&efx
->stats_lock
);
1750 efx
->type
->update_stats(efx
);
1752 stats
->rx_packets
= mac_stats
->rx_packets
;
1753 stats
->tx_packets
= mac_stats
->tx_packets
;
1754 stats
->rx_bytes
= mac_stats
->rx_bytes
;
1755 stats
->tx_bytes
= mac_stats
->tx_bytes
;
1756 stats
->rx_dropped
= efx
->n_rx_nodesc_drop_cnt
;
1757 stats
->multicast
= mac_stats
->rx_multicast
;
1758 stats
->collisions
= mac_stats
->tx_collision
;
1759 stats
->rx_length_errors
= (mac_stats
->rx_gtjumbo
+
1760 mac_stats
->rx_length_error
);
1761 stats
->rx_crc_errors
= mac_stats
->rx_bad
;
1762 stats
->rx_frame_errors
= mac_stats
->rx_align_error
;
1763 stats
->rx_fifo_errors
= mac_stats
->rx_overflow
;
1764 stats
->rx_missed_errors
= mac_stats
->rx_missed
;
1765 stats
->tx_window_errors
= mac_stats
->tx_late_collision
;
1767 stats
->rx_errors
= (stats
->rx_length_errors
+
1768 stats
->rx_crc_errors
+
1769 stats
->rx_frame_errors
+
1770 mac_stats
->rx_symbol_error
);
1771 stats
->tx_errors
= (stats
->tx_window_errors
+
1774 spin_unlock_bh(&efx
->stats_lock
);
1779 /* Context: netif_tx_lock held, BHs disabled. */
1780 static void efx_watchdog(struct net_device
*net_dev
)
1782 struct efx_nic
*efx
= netdev_priv(net_dev
);
1784 netif_err(efx
, tx_err
, efx
->net_dev
,
1785 "TX stuck with port_enabled=%d: resetting channels\n",
1788 efx_schedule_reset(efx
, RESET_TYPE_TX_WATCHDOG
);
1792 /* Context: process, rtnl_lock() held. */
1793 static int efx_change_mtu(struct net_device
*net_dev
, int new_mtu
)
1795 struct efx_nic
*efx
= netdev_priv(net_dev
);
1797 EFX_ASSERT_RESET_SERIALISED(efx
);
1799 if (new_mtu
> EFX_MAX_MTU
)
1804 netif_dbg(efx
, drv
, efx
->net_dev
, "changing MTU to %d\n", new_mtu
);
1806 efx_fini_channels(efx
);
1808 mutex_lock(&efx
->mac_lock
);
1809 /* Reconfigure the MAC before enabling the dma queues so that
1810 * the RX buffers don't overflow */
1811 net_dev
->mtu
= new_mtu
;
1812 efx
->type
->reconfigure_mac(efx
);
1813 mutex_unlock(&efx
->mac_lock
);
1815 efx_init_channels(efx
);
1821 static int efx_set_mac_address(struct net_device
*net_dev
, void *data
)
1823 struct efx_nic
*efx
= netdev_priv(net_dev
);
1824 struct sockaddr
*addr
= data
;
1825 char *new_addr
= addr
->sa_data
;
1827 EFX_ASSERT_RESET_SERIALISED(efx
);
1829 if (!is_valid_ether_addr(new_addr
)) {
1830 netif_err(efx
, drv
, efx
->net_dev
,
1831 "invalid ethernet MAC address requested: %pM\n",
1836 memcpy(net_dev
->dev_addr
, new_addr
, net_dev
->addr_len
);
1838 /* Reconfigure the MAC */
1839 mutex_lock(&efx
->mac_lock
);
1840 efx
->type
->reconfigure_mac(efx
);
1841 mutex_unlock(&efx
->mac_lock
);
1846 /* Context: netif_addr_lock held, BHs disabled. */
1847 static void efx_set_rx_mode(struct net_device
*net_dev
)
1849 struct efx_nic
*efx
= netdev_priv(net_dev
);
1850 struct netdev_hw_addr
*ha
;
1851 union efx_multicast_hash
*mc_hash
= &efx
->multicast_hash
;
1855 efx
->promiscuous
= !!(net_dev
->flags
& IFF_PROMISC
);
1857 /* Build multicast hash table */
1858 if (efx
->promiscuous
|| (net_dev
->flags
& IFF_ALLMULTI
)) {
1859 memset(mc_hash
, 0xff, sizeof(*mc_hash
));
1861 memset(mc_hash
, 0x00, sizeof(*mc_hash
));
1862 netdev_for_each_mc_addr(ha
, net_dev
) {
1863 crc
= ether_crc_le(ETH_ALEN
, ha
->addr
);
1864 bit
= crc
& (EFX_MCAST_HASH_ENTRIES
- 1);
1865 set_bit_le(bit
, mc_hash
->byte
);
1868 /* Broadcast packets go through the multicast hash filter.
1869 * ether_crc_le() of the broadcast address is 0xbe2612ff
1870 * so we always add bit 0xff to the mask.
1872 set_bit_le(0xff, mc_hash
->byte
);
1875 if (efx
->port_enabled
)
1876 queue_work(efx
->workqueue
, &efx
->mac_work
);
1877 /* Otherwise efx_start_port() will do this */
1880 static int efx_set_features(struct net_device
*net_dev
, netdev_features_t data
)
1882 struct efx_nic
*efx
= netdev_priv(net_dev
);
1884 /* If disabling RX n-tuple filtering, clear existing filters */
1885 if (net_dev
->features
& ~data
& NETIF_F_NTUPLE
)
1886 efx_filter_clear_rx(efx
, EFX_FILTER_PRI_MANUAL
);
1891 static const struct net_device_ops efx_netdev_ops
= {
1892 .ndo_open
= efx_net_open
,
1893 .ndo_stop
= efx_net_stop
,
1894 .ndo_get_stats64
= efx_net_stats
,
1895 .ndo_tx_timeout
= efx_watchdog
,
1896 .ndo_start_xmit
= efx_hard_start_xmit
,
1897 .ndo_validate_addr
= eth_validate_addr
,
1898 .ndo_do_ioctl
= efx_ioctl
,
1899 .ndo_change_mtu
= efx_change_mtu
,
1900 .ndo_set_mac_address
= efx_set_mac_address
,
1901 .ndo_set_rx_mode
= efx_set_rx_mode
,
1902 .ndo_set_features
= efx_set_features
,
1903 #ifdef CONFIG_NET_POLL_CONTROLLER
1904 .ndo_poll_controller
= efx_netpoll
,
1906 .ndo_setup_tc
= efx_setup_tc
,
1907 #ifdef CONFIG_RFS_ACCEL
1908 .ndo_rx_flow_steer
= efx_filter_rfs
,
1912 static void efx_update_name(struct efx_nic
*efx
)
1914 strcpy(efx
->name
, efx
->net_dev
->name
);
1915 efx_mtd_rename(efx
);
1916 efx_set_channel_names(efx
);
1919 static int efx_netdev_event(struct notifier_block
*this,
1920 unsigned long event
, void *ptr
)
1922 struct net_device
*net_dev
= ptr
;
1924 if (net_dev
->netdev_ops
== &efx_netdev_ops
&&
1925 event
== NETDEV_CHANGENAME
)
1926 efx_update_name(netdev_priv(net_dev
));
1931 static struct notifier_block efx_netdev_notifier
= {
1932 .notifier_call
= efx_netdev_event
,
1936 show_phy_type(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
1938 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
1939 return sprintf(buf
, "%d\n", efx
->phy_type
);
1941 static DEVICE_ATTR(phy_type
, 0644, show_phy_type
, NULL
);
1943 static int efx_register_netdev(struct efx_nic
*efx
)
1945 struct net_device
*net_dev
= efx
->net_dev
;
1946 struct efx_channel
*channel
;
1949 net_dev
->watchdog_timeo
= 5 * HZ
;
1950 net_dev
->irq
= efx
->pci_dev
->irq
;
1951 net_dev
->netdev_ops
= &efx_netdev_ops
;
1952 SET_ETHTOOL_OPS(net_dev
, &efx_ethtool_ops
);
1956 rc
= dev_alloc_name(net_dev
, net_dev
->name
);
1959 efx_update_name(efx
);
1961 rc
= register_netdevice(net_dev
);
1965 efx_for_each_channel(channel
, efx
) {
1966 struct efx_tx_queue
*tx_queue
;
1967 efx_for_each_channel_tx_queue(tx_queue
, channel
)
1968 efx_init_tx_queue_core_txq(tx_queue
);
1971 /* Always start with carrier off; PHY events will detect the link */
1972 netif_carrier_off(net_dev
);
1976 rc
= device_create_file(&efx
->pci_dev
->dev
, &dev_attr_phy_type
);
1978 netif_err(efx
, drv
, efx
->net_dev
,
1979 "failed to init net dev attributes\n");
1980 goto fail_registered
;
1987 netif_err(efx
, drv
, efx
->net_dev
, "could not register net dev\n");
1991 unregister_netdev(net_dev
);
1995 static void efx_unregister_netdev(struct efx_nic
*efx
)
1997 struct efx_channel
*channel
;
1998 struct efx_tx_queue
*tx_queue
;
2003 BUG_ON(netdev_priv(efx
->net_dev
) != efx
);
2005 /* Free up any skbs still remaining. This has to happen before
2006 * we try to unregister the netdev as running their destructors
2007 * may be needed to get the device ref. count to 0. */
2008 efx_for_each_channel(channel
, efx
) {
2009 efx_for_each_channel_tx_queue(tx_queue
, channel
)
2010 efx_release_tx_buffers(tx_queue
);
2013 strlcpy(efx
->name
, pci_name(efx
->pci_dev
), sizeof(efx
->name
));
2014 device_remove_file(&efx
->pci_dev
->dev
, &dev_attr_phy_type
);
2015 unregister_netdev(efx
->net_dev
);
2018 /**************************************************************************
2020 * Device reset and suspend
2022 **************************************************************************/
2024 /* Tears down the entire software state and most of the hardware state
2026 void efx_reset_down(struct efx_nic
*efx
, enum reset_type method
)
2028 EFX_ASSERT_RESET_SERIALISED(efx
);
2031 mutex_lock(&efx
->mac_lock
);
2033 efx_fini_channels(efx
);
2034 if (efx
->port_initialized
&& method
!= RESET_TYPE_INVISIBLE
)
2035 efx
->phy_op
->fini(efx
);
2036 efx
->type
->fini(efx
);
2039 /* This function will always ensure that the locks acquired in
2040 * efx_reset_down() are released. A failure return code indicates
2041 * that we were unable to reinitialise the hardware, and the
2042 * driver should be disabled. If ok is false, then the rx and tx
2043 * engines are not restarted, pending a RESET_DISABLE. */
2044 int efx_reset_up(struct efx_nic
*efx
, enum reset_type method
, bool ok
)
2048 EFX_ASSERT_RESET_SERIALISED(efx
);
2050 rc
= efx
->type
->init(efx
);
2052 netif_err(efx
, drv
, efx
->net_dev
, "failed to initialise NIC\n");
2059 if (efx
->port_initialized
&& method
!= RESET_TYPE_INVISIBLE
) {
2060 rc
= efx
->phy_op
->init(efx
);
2063 if (efx
->phy_op
->reconfigure(efx
))
2064 netif_err(efx
, drv
, efx
->net_dev
,
2065 "could not restore PHY settings\n");
2068 efx
->type
->reconfigure_mac(efx
);
2070 efx_init_channels(efx
);
2071 efx_restore_filters(efx
);
2073 mutex_unlock(&efx
->mac_lock
);
2080 efx
->port_initialized
= false;
2082 mutex_unlock(&efx
->mac_lock
);
2087 /* Reset the NIC using the specified method. Note that the reset may
2088 * fail, in which case the card will be left in an unusable state.
2090 * Caller must hold the rtnl_lock.
2092 int efx_reset(struct efx_nic
*efx
, enum reset_type method
)
2097 netif_info(efx
, drv
, efx
->net_dev
, "resetting (%s)\n",
2098 RESET_TYPE(method
));
2100 netif_device_detach(efx
->net_dev
);
2101 efx_reset_down(efx
, method
);
2103 rc
= efx
->type
->reset(efx
, method
);
2105 netif_err(efx
, drv
, efx
->net_dev
, "failed to reset hardware\n");
2109 /* Clear flags for the scopes we covered. We assume the NIC and
2110 * driver are now quiescent so that there is no race here.
2112 efx
->reset_pending
&= -(1 << (method
+ 1));
2114 /* Reinitialise bus-mastering, which may have been turned off before
2115 * the reset was scheduled. This is still appropriate, even in the
2116 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
2117 * can respond to requests. */
2118 pci_set_master(efx
->pci_dev
);
2121 /* Leave device stopped if necessary */
2122 disabled
= rc
|| method
== RESET_TYPE_DISABLE
;
2123 rc2
= efx_reset_up(efx
, method
, !disabled
);
2131 dev_close(efx
->net_dev
);
2132 netif_err(efx
, drv
, efx
->net_dev
, "has been disabled\n");
2133 efx
->state
= STATE_DISABLED
;
2135 netif_dbg(efx
, drv
, efx
->net_dev
, "reset complete\n");
2136 netif_device_attach(efx
->net_dev
);
2141 /* The worker thread exists so that code that cannot sleep can
2142 * schedule a reset for later.
2144 static void efx_reset_work(struct work_struct
*data
)
2146 struct efx_nic
*efx
= container_of(data
, struct efx_nic
, reset_work
);
2147 unsigned long pending
= ACCESS_ONCE(efx
->reset_pending
);
2152 /* If we're not RUNNING then don't reset. Leave the reset_pending
2153 * flags set so that efx_pci_probe_main will be retried */
2154 if (efx
->state
!= STATE_RUNNING
) {
2155 netif_info(efx
, drv
, efx
->net_dev
,
2156 "scheduled reset quenched. NIC not RUNNING\n");
2161 (void)efx_reset(efx
, fls(pending
) - 1);
2165 void efx_schedule_reset(struct efx_nic
*efx
, enum reset_type type
)
2167 enum reset_type method
;
2170 case RESET_TYPE_INVISIBLE
:
2171 case RESET_TYPE_ALL
:
2172 case RESET_TYPE_WORLD
:
2173 case RESET_TYPE_DISABLE
:
2175 netif_dbg(efx
, drv
, efx
->net_dev
, "scheduling %s reset\n",
2176 RESET_TYPE(method
));
2179 method
= efx
->type
->map_reset_reason(type
);
2180 netif_dbg(efx
, drv
, efx
->net_dev
,
2181 "scheduling %s reset for %s\n",
2182 RESET_TYPE(method
), RESET_TYPE(type
));
2186 set_bit(method
, &efx
->reset_pending
);
2188 /* efx_process_channel() will no longer read events once a
2189 * reset is scheduled. So switch back to poll'd MCDI completions. */
2190 efx_mcdi_mode_poll(efx
);
2192 queue_work(reset_workqueue
, &efx
->reset_work
);
2195 /**************************************************************************
2197 * List of NICs we support
2199 **************************************************************************/
2201 /* PCI device ID table */
2202 static DEFINE_PCI_DEVICE_TABLE(efx_pci_table
) = {
2203 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
,
2204 PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0
),
2205 .driver_data
= (unsigned long) &falcon_a1_nic_type
},
2206 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
,
2207 PCI_DEVICE_ID_SOLARFLARE_SFC4000B
),
2208 .driver_data
= (unsigned long) &falcon_b0_nic_type
},
2209 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0803), /* SFC9020 */
2210 .driver_data
= (unsigned long) &siena_a0_nic_type
},
2211 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0813), /* SFL9021 */
2212 .driver_data
= (unsigned long) &siena_a0_nic_type
},
2213 {0} /* end of list */
2216 /**************************************************************************
2218 * Dummy PHY/MAC operations
2220 * Can be used for some unimplemented operations
2221 * Needed so all function pointers are valid and do not have to be tested
2224 **************************************************************************/
2225 int efx_port_dummy_op_int(struct efx_nic
*efx
)
2229 void efx_port_dummy_op_void(struct efx_nic
*efx
) {}
2231 static bool efx_port_dummy_op_poll(struct efx_nic
*efx
)
2236 static const struct efx_phy_operations efx_dummy_phy_operations
= {
2237 .init
= efx_port_dummy_op_int
,
2238 .reconfigure
= efx_port_dummy_op_int
,
2239 .poll
= efx_port_dummy_op_poll
,
2240 .fini
= efx_port_dummy_op_void
,
2243 /**************************************************************************
2247 **************************************************************************/
2249 /* This zeroes out and then fills in the invariants in a struct
2250 * efx_nic (including all sub-structures).
2252 static int efx_init_struct(struct efx_nic
*efx
, const struct efx_nic_type
*type
,
2253 struct pci_dev
*pci_dev
, struct net_device
*net_dev
)
2257 /* Initialise common structures */
2258 memset(efx
, 0, sizeof(*efx
));
2259 spin_lock_init(&efx
->biu_lock
);
2260 #ifdef CONFIG_SFC_MTD
2261 INIT_LIST_HEAD(&efx
->mtd_list
);
2263 INIT_WORK(&efx
->reset_work
, efx_reset_work
);
2264 INIT_DELAYED_WORK(&efx
->monitor_work
, efx_monitor
);
2265 efx
->pci_dev
= pci_dev
;
2266 efx
->msg_enable
= debug
;
2267 efx
->state
= STATE_INIT
;
2268 strlcpy(efx
->name
, pci_name(pci_dev
), sizeof(efx
->name
));
2270 efx
->net_dev
= net_dev
;
2271 spin_lock_init(&efx
->stats_lock
);
2272 mutex_init(&efx
->mac_lock
);
2273 efx
->phy_op
= &efx_dummy_phy_operations
;
2274 efx
->mdio
.dev
= net_dev
;
2275 INIT_WORK(&efx
->mac_work
, efx_mac_work
);
2277 for (i
= 0; i
< EFX_MAX_CHANNELS
; i
++) {
2278 efx
->channel
[i
] = efx_alloc_channel(efx
, i
, NULL
);
2279 if (!efx
->channel
[i
])
2285 EFX_BUG_ON_PARANOID(efx
->type
->phys_addr_channels
> EFX_MAX_CHANNELS
);
2287 /* Higher numbered interrupt modes are less capable! */
2288 efx
->interrupt_mode
= max(efx
->type
->max_interrupt_mode
,
2291 /* Would be good to use the net_dev name, but we're too early */
2292 snprintf(efx
->workqueue_name
, sizeof(efx
->workqueue_name
), "sfc%s",
2294 efx
->workqueue
= create_singlethread_workqueue(efx
->workqueue_name
);
2295 if (!efx
->workqueue
)
2301 efx_fini_struct(efx
);
2305 static void efx_fini_struct(struct efx_nic
*efx
)
2309 for (i
= 0; i
< EFX_MAX_CHANNELS
; i
++)
2310 kfree(efx
->channel
[i
]);
2312 if (efx
->workqueue
) {
2313 destroy_workqueue(efx
->workqueue
);
2314 efx
->workqueue
= NULL
;
2318 /**************************************************************************
2322 **************************************************************************/
2324 /* Main body of final NIC shutdown code
2325 * This is called only at module unload (or hotplug removal).
2327 static void efx_pci_remove_main(struct efx_nic
*efx
)
2329 #ifdef CONFIG_RFS_ACCEL
2330 free_irq_cpu_rmap(efx
->net_dev
->rx_cpu_rmap
);
2331 efx
->net_dev
->rx_cpu_rmap
= NULL
;
2333 efx_nic_fini_interrupt(efx
);
2334 efx_fini_channels(efx
);
2336 efx
->type
->fini(efx
);
2338 efx_remove_all(efx
);
2341 /* Final NIC shutdown
2342 * This is called only at module unload (or hotplug removal).
2344 static void efx_pci_remove(struct pci_dev
*pci_dev
)
2346 struct efx_nic
*efx
;
2348 efx
= pci_get_drvdata(pci_dev
);
2352 /* Mark the NIC as fini, then stop the interface */
2354 efx
->state
= STATE_FINI
;
2355 dev_close(efx
->net_dev
);
2357 /* Allow any queued efx_resets() to complete */
2360 efx_unregister_netdev(efx
);
2362 efx_mtd_remove(efx
);
2364 /* Wait for any scheduled resets to complete. No more will be
2365 * scheduled from this point because efx_stop_all() has been
2366 * called, we are no longer registered with driverlink, and
2367 * the net_device's have been removed. */
2368 cancel_work_sync(&efx
->reset_work
);
2370 efx_pci_remove_main(efx
);
2373 netif_dbg(efx
, drv
, efx
->net_dev
, "shutdown successful\n");
2375 pci_set_drvdata(pci_dev
, NULL
);
2376 efx_fini_struct(efx
);
2377 free_netdev(efx
->net_dev
);
2380 /* Main body of NIC initialisation
2381 * This is called at module load (or hotplug insertion, theoretically).
2383 static int efx_pci_probe_main(struct efx_nic
*efx
)
2387 /* Do start-of-day initialisation */
2388 rc
= efx_probe_all(efx
);
2394 rc
= efx
->type
->init(efx
);
2396 netif_err(efx
, probe
, efx
->net_dev
,
2397 "failed to initialise NIC\n");
2401 rc
= efx_init_port(efx
);
2403 netif_err(efx
, probe
, efx
->net_dev
,
2404 "failed to initialise port\n");
2408 efx_init_channels(efx
);
2410 rc
= efx_nic_init_interrupt(efx
);
2417 efx_fini_channels(efx
);
2420 efx
->type
->fini(efx
);
2423 efx_remove_all(efx
);
2428 /* NIC initialisation
2430 * This is called at module load (or hotplug insertion,
2431 * theoretically). It sets up PCI mappings, resets the NIC,
2432 * sets up and registers the network devices with the kernel and hooks
2433 * the interrupt service routine. It does not prepare the device for
2434 * transmission; this is left to the first time one of the network
2435 * interfaces is brought up (i.e. efx_net_open).
2437 static int __devinit
efx_pci_probe(struct pci_dev
*pci_dev
,
2438 const struct pci_device_id
*entry
)
2440 const struct efx_nic_type
*type
= (const struct efx_nic_type
*) entry
->driver_data
;
2441 struct net_device
*net_dev
;
2442 struct efx_nic
*efx
;
2445 /* Allocate and initialise a struct net_device and struct efx_nic */
2446 net_dev
= alloc_etherdev_mqs(sizeof(*efx
), EFX_MAX_CORE_TX_QUEUES
,
2450 net_dev
->features
|= (type
->offload_features
| NETIF_F_SG
|
2451 NETIF_F_HIGHDMA
| NETIF_F_TSO
|
2453 if (type
->offload_features
& NETIF_F_V6_CSUM
)
2454 net_dev
->features
|= NETIF_F_TSO6
;
2455 /* Mask for features that also apply to VLAN devices */
2456 net_dev
->vlan_features
|= (NETIF_F_ALL_CSUM
| NETIF_F_SG
|
2457 NETIF_F_HIGHDMA
| NETIF_F_ALL_TSO
|
2459 /* All offloads can be toggled */
2460 net_dev
->hw_features
= net_dev
->features
& ~NETIF_F_HIGHDMA
;
2461 efx
= netdev_priv(net_dev
);
2462 pci_set_drvdata(pci_dev
, efx
);
2463 SET_NETDEV_DEV(net_dev
, &pci_dev
->dev
);
2464 rc
= efx_init_struct(efx
, type
, pci_dev
, net_dev
);
2468 netif_info(efx
, probe
, efx
->net_dev
,
2469 "Solarflare NIC detected\n");
2471 /* Set up basic I/O (BAR mappings etc) */
2472 rc
= efx_init_io(efx
);
2476 rc
= efx_pci_probe_main(efx
);
2478 /* Serialise against efx_reset(). No more resets will be
2479 * scheduled since efx_stop_all() has been called, and we have
2480 * not and never have been registered.
2482 cancel_work_sync(&efx
->reset_work
);
2487 /* If there was a scheduled reset during probe, the NIC is
2488 * probably hosed anyway.
2490 if (efx
->reset_pending
) {
2495 /* Switch to the running state before we expose the device to the OS,
2496 * so that dev_open()|efx_start_all() will actually start the device */
2497 efx
->state
= STATE_RUNNING
;
2499 rc
= efx_register_netdev(efx
);
2503 netif_dbg(efx
, probe
, efx
->net_dev
, "initialisation successful\n");
2505 /* Try to create MTDs, but allow this to fail */
2507 rc
= efx_mtd_probe(efx
);
2510 netif_warn(efx
, probe
, efx
->net_dev
,
2511 "failed to create MTDs (%d)\n", rc
);
2516 efx_pci_remove_main(efx
);
2520 efx_fini_struct(efx
);
2523 netif_dbg(efx
, drv
, efx
->net_dev
, "initialisation failed. rc=%d\n", rc
);
2524 free_netdev(net_dev
);
2528 static int efx_pm_freeze(struct device
*dev
)
2530 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
2532 efx
->state
= STATE_FINI
;
2534 netif_device_detach(efx
->net_dev
);
2537 efx_fini_channels(efx
);
2542 static int efx_pm_thaw(struct device
*dev
)
2544 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
2546 efx
->state
= STATE_INIT
;
2548 efx_init_channels(efx
);
2550 mutex_lock(&efx
->mac_lock
);
2551 efx
->phy_op
->reconfigure(efx
);
2552 mutex_unlock(&efx
->mac_lock
);
2556 netif_device_attach(efx
->net_dev
);
2558 efx
->state
= STATE_RUNNING
;
2560 efx
->type
->resume_wol(efx
);
2562 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
2563 queue_work(reset_workqueue
, &efx
->reset_work
);
2568 static int efx_pm_poweroff(struct device
*dev
)
2570 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
2571 struct efx_nic
*efx
= pci_get_drvdata(pci_dev
);
2573 efx
->type
->fini(efx
);
2575 efx
->reset_pending
= 0;
2577 pci_save_state(pci_dev
);
2578 return pci_set_power_state(pci_dev
, PCI_D3hot
);
2581 /* Used for both resume and restore */
2582 static int efx_pm_resume(struct device
*dev
)
2584 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
2585 struct efx_nic
*efx
= pci_get_drvdata(pci_dev
);
2588 rc
= pci_set_power_state(pci_dev
, PCI_D0
);
2591 pci_restore_state(pci_dev
);
2592 rc
= pci_enable_device(pci_dev
);
2595 pci_set_master(efx
->pci_dev
);
2596 rc
= efx
->type
->reset(efx
, RESET_TYPE_ALL
);
2599 rc
= efx
->type
->init(efx
);
2606 static int efx_pm_suspend(struct device
*dev
)
2611 rc
= efx_pm_poweroff(dev
);
2617 static const struct dev_pm_ops efx_pm_ops
= {
2618 .suspend
= efx_pm_suspend
,
2619 .resume
= efx_pm_resume
,
2620 .freeze
= efx_pm_freeze
,
2621 .thaw
= efx_pm_thaw
,
2622 .poweroff
= efx_pm_poweroff
,
2623 .restore
= efx_pm_resume
,
2626 static struct pci_driver efx_pci_driver
= {
2627 .name
= KBUILD_MODNAME
,
2628 .id_table
= efx_pci_table
,
2629 .probe
= efx_pci_probe
,
2630 .remove
= efx_pci_remove
,
2631 .driver
.pm
= &efx_pm_ops
,
2634 /**************************************************************************
2636 * Kernel module interface
2638 *************************************************************************/
2640 module_param(interrupt_mode
, uint
, 0444);
2641 MODULE_PARM_DESC(interrupt_mode
,
2642 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
2644 static int __init
efx_init_module(void)
2648 printk(KERN_INFO
"Solarflare NET driver v" EFX_DRIVER_VERSION
"\n");
2650 rc
= register_netdevice_notifier(&efx_netdev_notifier
);
2654 reset_workqueue
= create_singlethread_workqueue("sfc_reset");
2655 if (!reset_workqueue
) {
2660 rc
= pci_register_driver(&efx_pci_driver
);
2667 destroy_workqueue(reset_workqueue
);
2669 unregister_netdevice_notifier(&efx_netdev_notifier
);
2674 static void __exit
efx_exit_module(void)
2676 printk(KERN_INFO
"Solarflare NET driver unloading\n");
2678 pci_unregister_driver(&efx_pci_driver
);
2679 destroy_workqueue(reset_workqueue
);
2680 unregister_netdevice_notifier(&efx_netdev_notifier
);
2684 module_init(efx_init_module
);
2685 module_exit(efx_exit_module
);
2687 MODULE_AUTHOR("Solarflare Communications and "
2688 "Michael Brown <mbrown@fensystems.co.uk>");
2689 MODULE_DESCRIPTION("Solarflare Communications network driver");
2690 MODULE_LICENSE("GPL");
2691 MODULE_DEVICE_TABLE(pci
, efx_pci_table
);