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 <linux/aer.h>
26 #include "net_driver.h"
32 #include "workarounds.h"
34 /**************************************************************************
38 **************************************************************************
41 /* Loopback mode names (see LOOPBACK_MODE()) */
42 const unsigned int efx_loopback_mode_max
= LOOPBACK_MAX
;
43 const char *const efx_loopback_mode_names
[] = {
44 [LOOPBACK_NONE
] = "NONE",
45 [LOOPBACK_DATA
] = "DATAPATH",
46 [LOOPBACK_GMAC
] = "GMAC",
47 [LOOPBACK_XGMII
] = "XGMII",
48 [LOOPBACK_XGXS
] = "XGXS",
49 [LOOPBACK_XAUI
] = "XAUI",
50 [LOOPBACK_GMII
] = "GMII",
51 [LOOPBACK_SGMII
] = "SGMII",
52 [LOOPBACK_XGBR
] = "XGBR",
53 [LOOPBACK_XFI
] = "XFI",
54 [LOOPBACK_XAUI_FAR
] = "XAUI_FAR",
55 [LOOPBACK_GMII_FAR
] = "GMII_FAR",
56 [LOOPBACK_SGMII_FAR
] = "SGMII_FAR",
57 [LOOPBACK_XFI_FAR
] = "XFI_FAR",
58 [LOOPBACK_GPHY
] = "GPHY",
59 [LOOPBACK_PHYXS
] = "PHYXS",
60 [LOOPBACK_PCS
] = "PCS",
61 [LOOPBACK_PMAPMD
] = "PMA/PMD",
62 [LOOPBACK_XPORT
] = "XPORT",
63 [LOOPBACK_XGMII_WS
] = "XGMII_WS",
64 [LOOPBACK_XAUI_WS
] = "XAUI_WS",
65 [LOOPBACK_XAUI_WS_FAR
] = "XAUI_WS_FAR",
66 [LOOPBACK_XAUI_WS_NEAR
] = "XAUI_WS_NEAR",
67 [LOOPBACK_GMII_WS
] = "GMII_WS",
68 [LOOPBACK_XFI_WS
] = "XFI_WS",
69 [LOOPBACK_XFI_WS_FAR
] = "XFI_WS_FAR",
70 [LOOPBACK_PHYXS_WS
] = "PHYXS_WS",
73 const unsigned int efx_reset_type_max
= RESET_TYPE_MAX
;
74 const char *const efx_reset_type_names
[] = {
75 [RESET_TYPE_INVISIBLE
] = "INVISIBLE",
76 [RESET_TYPE_ALL
] = "ALL",
77 [RESET_TYPE_RECOVER_OR_ALL
] = "RECOVER_OR_ALL",
78 [RESET_TYPE_WORLD
] = "WORLD",
79 [RESET_TYPE_RECOVER_OR_DISABLE
] = "RECOVER_OR_DISABLE",
80 [RESET_TYPE_DISABLE
] = "DISABLE",
81 [RESET_TYPE_TX_WATCHDOG
] = "TX_WATCHDOG",
82 [RESET_TYPE_INT_ERROR
] = "INT_ERROR",
83 [RESET_TYPE_RX_RECOVERY
] = "RX_RECOVERY",
84 [RESET_TYPE_RX_DESC_FETCH
] = "RX_DESC_FETCH",
85 [RESET_TYPE_TX_DESC_FETCH
] = "TX_DESC_FETCH",
86 [RESET_TYPE_TX_SKIP
] = "TX_SKIP",
87 [RESET_TYPE_MC_FAILURE
] = "MC_FAILURE",
90 /* Reset workqueue. If any NIC has a hardware failure then a reset will be
91 * queued onto this work queue. This is not a per-nic work queue, because
92 * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised.
94 static struct workqueue_struct
*reset_workqueue
;
96 /**************************************************************************
100 *************************************************************************/
103 * Use separate channels for TX and RX events
105 * Set this to 1 to use separate channels for TX and RX. It allows us
106 * to control interrupt affinity separately for TX and RX.
108 * This is only used in MSI-X interrupt mode
110 static bool separate_tx_channels
;
111 module_param(separate_tx_channels
, bool, 0444);
112 MODULE_PARM_DESC(separate_tx_channels
,
113 "Use separate channels for TX and RX");
115 /* This is the weight assigned to each of the (per-channel) virtual
118 static int napi_weight
= 64;
120 /* This is the time (in jiffies) between invocations of the hardware
122 * On Falcon-based NICs, this will:
123 * - Check the on-board hardware monitor;
124 * - Poll the link state and reconfigure the hardware as necessary.
125 * On Siena-based NICs for power systems with EEH support, this will give EEH a
128 static unsigned int efx_monitor_interval
= 1 * HZ
;
130 /* Initial interrupt moderation settings. They can be modified after
131 * module load with ethtool.
133 * The default for RX should strike a balance between increasing the
134 * round-trip latency and reducing overhead.
136 static unsigned int rx_irq_mod_usec
= 60;
138 /* Initial interrupt moderation settings. They can be modified after
139 * module load with ethtool.
141 * This default is chosen to ensure that a 10G link does not go idle
142 * while a TX queue is stopped after it has become full. A queue is
143 * restarted when it drops below half full. The time this takes (assuming
144 * worst case 3 descriptors per packet and 1024 descriptors) is
145 * 512 / 3 * 1.2 = 205 usec.
147 static unsigned int tx_irq_mod_usec
= 150;
149 /* This is the first interrupt mode to try out of:
154 static unsigned int interrupt_mode
;
156 /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS),
157 * i.e. the number of CPUs among which we may distribute simultaneous
158 * interrupt handling.
160 * Cards without MSI-X will only target one CPU via legacy or MSI interrupt.
161 * The default (0) means to assign an interrupt to each core.
163 static unsigned int rss_cpus
;
164 module_param(rss_cpus
, uint
, 0444);
165 MODULE_PARM_DESC(rss_cpus
, "Number of CPUs to use for Receive-Side Scaling");
167 static bool phy_flash_cfg
;
168 module_param(phy_flash_cfg
, bool, 0644);
169 MODULE_PARM_DESC(phy_flash_cfg
, "Set PHYs into reflash mode initially");
171 static unsigned irq_adapt_low_thresh
= 8000;
172 module_param(irq_adapt_low_thresh
, uint
, 0644);
173 MODULE_PARM_DESC(irq_adapt_low_thresh
,
174 "Threshold score for reducing IRQ moderation");
176 static unsigned irq_adapt_high_thresh
= 16000;
177 module_param(irq_adapt_high_thresh
, uint
, 0644);
178 MODULE_PARM_DESC(irq_adapt_high_thresh
,
179 "Threshold score for increasing IRQ moderation");
181 static unsigned debug
= (NETIF_MSG_DRV
| NETIF_MSG_PROBE
|
182 NETIF_MSG_LINK
| NETIF_MSG_IFDOWN
|
183 NETIF_MSG_IFUP
| NETIF_MSG_RX_ERR
|
184 NETIF_MSG_TX_ERR
| NETIF_MSG_HW
);
185 module_param(debug
, uint
, 0);
186 MODULE_PARM_DESC(debug
, "Bitmapped debugging message enable value");
188 /**************************************************************************
190 * Utility functions and prototypes
192 *************************************************************************/
194 static void efx_start_interrupts(struct efx_nic
*efx
, bool may_keep_eventq
);
195 static void efx_stop_interrupts(struct efx_nic
*efx
, bool may_keep_eventq
);
196 static void efx_remove_channel(struct efx_channel
*channel
);
197 static void efx_remove_channels(struct efx_nic
*efx
);
198 static const struct efx_channel_type efx_default_channel_type
;
199 static void efx_remove_port(struct efx_nic
*efx
);
200 static void efx_init_napi_channel(struct efx_channel
*channel
);
201 static void efx_fini_napi(struct efx_nic
*efx
);
202 static void efx_fini_napi_channel(struct efx_channel
*channel
);
203 static void efx_fini_struct(struct efx_nic
*efx
);
204 static void efx_start_all(struct efx_nic
*efx
);
205 static void efx_stop_all(struct efx_nic
*efx
);
207 #define EFX_ASSERT_RESET_SERIALISED(efx) \
209 if ((efx->state == STATE_READY) || \
210 (efx->state == STATE_RECOVERY) || \
211 (efx->state == STATE_DISABLED)) \
215 static int efx_check_disabled(struct efx_nic
*efx
)
217 if (efx
->state
== STATE_DISABLED
|| efx
->state
== STATE_RECOVERY
) {
218 netif_err(efx
, drv
, efx
->net_dev
,
219 "device is disabled due to earlier errors\n");
225 /**************************************************************************
227 * Event queue processing
229 *************************************************************************/
231 /* Process channel's event queue
233 * This function is responsible for processing the event queue of a
234 * single channel. The caller must guarantee that this function will
235 * never be concurrently called more than once on the same channel,
236 * though different channels may be being processed concurrently.
238 static int efx_process_channel(struct efx_channel
*channel
, int budget
)
242 if (unlikely(!channel
->enabled
))
245 spent
= efx_nic_process_eventq(channel
, budget
);
246 if (spent
&& efx_channel_has_rx_queue(channel
)) {
247 struct efx_rx_queue
*rx_queue
=
248 efx_channel_get_rx_queue(channel
);
250 efx_rx_flush_packet(channel
);
251 if (rx_queue
->enabled
)
252 efx_fast_push_rx_descriptors(rx_queue
);
258 /* Mark channel as finished processing
260 * Note that since we will not receive further interrupts for this
261 * channel before we finish processing and call the eventq_read_ack()
262 * method, there is no need to use the interrupt hold-off timers.
264 static inline void efx_channel_processed(struct efx_channel
*channel
)
266 /* The interrupt handler for this channel may set work_pending
267 * as soon as we acknowledge the events we've seen. Make sure
268 * it's cleared before then. */
269 channel
->work_pending
= false;
272 efx_nic_eventq_read_ack(channel
);
277 * NAPI guarantees serialisation of polls of the same device, which
278 * provides the guarantee required by efx_process_channel().
280 static int efx_poll(struct napi_struct
*napi
, int budget
)
282 struct efx_channel
*channel
=
283 container_of(napi
, struct efx_channel
, napi_str
);
284 struct efx_nic
*efx
= channel
->efx
;
287 netif_vdbg(efx
, intr
, efx
->net_dev
,
288 "channel %d NAPI poll executing on CPU %d\n",
289 channel
->channel
, raw_smp_processor_id());
291 spent
= efx_process_channel(channel
, budget
);
293 if (spent
< budget
) {
294 if (efx_channel_has_rx_queue(channel
) &&
295 efx
->irq_rx_adaptive
&&
296 unlikely(++channel
->irq_count
== 1000)) {
297 if (unlikely(channel
->irq_mod_score
<
298 irq_adapt_low_thresh
)) {
299 if (channel
->irq_moderation
> 1) {
300 channel
->irq_moderation
-= 1;
301 efx
->type
->push_irq_moderation(channel
);
303 } else if (unlikely(channel
->irq_mod_score
>
304 irq_adapt_high_thresh
)) {
305 if (channel
->irq_moderation
<
306 efx
->irq_rx_moderation
) {
307 channel
->irq_moderation
+= 1;
308 efx
->type
->push_irq_moderation(channel
);
311 channel
->irq_count
= 0;
312 channel
->irq_mod_score
= 0;
315 efx_filter_rfs_expire(channel
);
317 /* There is no race here; although napi_disable() will
318 * only wait for napi_complete(), this isn't a problem
319 * since efx_channel_processed() will have no effect if
320 * interrupts have already been disabled.
323 efx_channel_processed(channel
);
329 /* Process the eventq of the specified channel immediately on this CPU
331 * Disable hardware generated interrupts, wait for any existing
332 * processing to finish, then directly poll (and ack ) the eventq.
333 * Finally reenable NAPI and interrupts.
335 * This is for use only during a loopback self-test. It must not
336 * deliver any packets up the stack as this can result in deadlock.
338 void efx_process_channel_now(struct efx_channel
*channel
)
340 struct efx_nic
*efx
= channel
->efx
;
342 BUG_ON(channel
->channel
>= efx
->n_channels
);
343 BUG_ON(!channel
->enabled
);
344 BUG_ON(!efx
->loopback_selftest
);
346 /* Disable interrupts and wait for ISRs to complete */
347 efx_nic_disable_interrupts(efx
);
348 if (efx
->legacy_irq
) {
349 synchronize_irq(efx
->legacy_irq
);
350 efx
->legacy_irq_enabled
= false;
353 synchronize_irq(channel
->irq
);
355 /* Wait for any NAPI processing to complete */
356 napi_disable(&channel
->napi_str
);
358 /* Poll the channel */
359 efx_process_channel(channel
, channel
->eventq_mask
+ 1);
361 /* Ack the eventq. This may cause an interrupt to be generated
362 * when they are reenabled */
363 efx_channel_processed(channel
);
365 napi_enable(&channel
->napi_str
);
367 efx
->legacy_irq_enabled
= true;
368 efx_nic_enable_interrupts(efx
);
371 /* Create event queue
372 * Event queue memory allocations are done only once. If the channel
373 * is reset, the memory buffer will be reused; this guards against
374 * errors during channel reset and also simplifies interrupt handling.
376 static int efx_probe_eventq(struct efx_channel
*channel
)
378 struct efx_nic
*efx
= channel
->efx
;
379 unsigned long entries
;
381 netif_dbg(efx
, probe
, efx
->net_dev
,
382 "chan %d create event queue\n", channel
->channel
);
384 /* Build an event queue with room for one event per tx and rx buffer,
385 * plus some extra for link state events and MCDI completions. */
386 entries
= roundup_pow_of_two(efx
->rxq_entries
+ efx
->txq_entries
+ 128);
387 EFX_BUG_ON_PARANOID(entries
> EFX_MAX_EVQ_SIZE
);
388 channel
->eventq_mask
= max(entries
, EFX_MIN_EVQ_SIZE
) - 1;
390 return efx_nic_probe_eventq(channel
);
393 /* Prepare channel's event queue */
394 static void efx_init_eventq(struct efx_channel
*channel
)
396 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
397 "chan %d init event queue\n", channel
->channel
);
399 channel
->eventq_read_ptr
= 0;
401 efx_nic_init_eventq(channel
);
404 /* Enable event queue processing and NAPI */
405 static void efx_start_eventq(struct efx_channel
*channel
)
407 netif_dbg(channel
->efx
, ifup
, channel
->efx
->net_dev
,
408 "chan %d start event queue\n", channel
->channel
);
410 /* The interrupt handler for this channel may set work_pending
411 * as soon as we enable it. Make sure it's cleared before
412 * then. Similarly, make sure it sees the enabled flag set.
414 channel
->work_pending
= false;
415 channel
->enabled
= true;
418 napi_enable(&channel
->napi_str
);
419 efx_nic_eventq_read_ack(channel
);
422 /* Disable event queue processing and NAPI */
423 static void efx_stop_eventq(struct efx_channel
*channel
)
425 if (!channel
->enabled
)
428 napi_disable(&channel
->napi_str
);
429 channel
->enabled
= false;
432 static void efx_fini_eventq(struct efx_channel
*channel
)
434 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
435 "chan %d fini event queue\n", channel
->channel
);
437 efx_nic_fini_eventq(channel
);
440 static void efx_remove_eventq(struct efx_channel
*channel
)
442 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
443 "chan %d remove event queue\n", channel
->channel
);
445 efx_nic_remove_eventq(channel
);
448 /**************************************************************************
452 *************************************************************************/
454 /* Allocate and initialise a channel structure. */
455 static struct efx_channel
*
456 efx_alloc_channel(struct efx_nic
*efx
, int i
, struct efx_channel
*old_channel
)
458 struct efx_channel
*channel
;
459 struct efx_rx_queue
*rx_queue
;
460 struct efx_tx_queue
*tx_queue
;
463 channel
= kzalloc(sizeof(*channel
), GFP_KERNEL
);
468 channel
->channel
= i
;
469 channel
->type
= &efx_default_channel_type
;
471 for (j
= 0; j
< EFX_TXQ_TYPES
; j
++) {
472 tx_queue
= &channel
->tx_queue
[j
];
474 tx_queue
->queue
= i
* EFX_TXQ_TYPES
+ j
;
475 tx_queue
->channel
= channel
;
478 rx_queue
= &channel
->rx_queue
;
480 setup_timer(&rx_queue
->slow_fill
, efx_rx_slow_fill
,
481 (unsigned long)rx_queue
);
486 /* Allocate and initialise a channel structure, copying parameters
487 * (but not resources) from an old channel structure.
489 static struct efx_channel
*
490 efx_copy_channel(const struct efx_channel
*old_channel
)
492 struct efx_channel
*channel
;
493 struct efx_rx_queue
*rx_queue
;
494 struct efx_tx_queue
*tx_queue
;
497 channel
= kmalloc(sizeof(*channel
), GFP_KERNEL
);
501 *channel
= *old_channel
;
503 channel
->napi_dev
= NULL
;
504 memset(&channel
->eventq
, 0, sizeof(channel
->eventq
));
506 for (j
= 0; j
< EFX_TXQ_TYPES
; j
++) {
507 tx_queue
= &channel
->tx_queue
[j
];
508 if (tx_queue
->channel
)
509 tx_queue
->channel
= channel
;
510 tx_queue
->buffer
= NULL
;
511 memset(&tx_queue
->txd
, 0, sizeof(tx_queue
->txd
));
514 rx_queue
= &channel
->rx_queue
;
515 rx_queue
->buffer
= NULL
;
516 memset(&rx_queue
->rxd
, 0, sizeof(rx_queue
->rxd
));
517 setup_timer(&rx_queue
->slow_fill
, efx_rx_slow_fill
,
518 (unsigned long)rx_queue
);
523 static int efx_probe_channel(struct efx_channel
*channel
)
525 struct efx_tx_queue
*tx_queue
;
526 struct efx_rx_queue
*rx_queue
;
529 netif_dbg(channel
->efx
, probe
, channel
->efx
->net_dev
,
530 "creating channel %d\n", channel
->channel
);
532 rc
= channel
->type
->pre_probe(channel
);
536 rc
= efx_probe_eventq(channel
);
540 efx_for_each_channel_tx_queue(tx_queue
, channel
) {
541 rc
= efx_probe_tx_queue(tx_queue
);
546 efx_for_each_channel_rx_queue(rx_queue
, channel
) {
547 rc
= efx_probe_rx_queue(rx_queue
);
552 channel
->n_rx_frm_trunc
= 0;
557 efx_remove_channel(channel
);
562 efx_get_channel_name(struct efx_channel
*channel
, char *buf
, size_t len
)
564 struct efx_nic
*efx
= channel
->efx
;
568 number
= channel
->channel
;
569 if (efx
->tx_channel_offset
== 0) {
571 } else if (channel
->channel
< efx
->tx_channel_offset
) {
575 number
-= efx
->tx_channel_offset
;
577 snprintf(buf
, len
, "%s%s-%d", efx
->name
, type
, number
);
580 static void efx_set_channel_names(struct efx_nic
*efx
)
582 struct efx_channel
*channel
;
584 efx_for_each_channel(channel
, efx
)
585 channel
->type
->get_name(channel
,
586 efx
->channel_name
[channel
->channel
],
587 sizeof(efx
->channel_name
[0]));
590 static int efx_probe_channels(struct efx_nic
*efx
)
592 struct efx_channel
*channel
;
595 /* Restart special buffer allocation */
596 efx
->next_buffer_table
= 0;
598 /* Probe channels in reverse, so that any 'extra' channels
599 * use the start of the buffer table. This allows the traffic
600 * channels to be resized without moving them or wasting the
601 * entries before them.
603 efx_for_each_channel_rev(channel
, efx
) {
604 rc
= efx_probe_channel(channel
);
606 netif_err(efx
, probe
, efx
->net_dev
,
607 "failed to create channel %d\n",
612 efx_set_channel_names(efx
);
617 efx_remove_channels(efx
);
621 /* Channels are shutdown and reinitialised whilst the NIC is running
622 * to propagate configuration changes (mtu, checksum offload), or
623 * to clear hardware error conditions
625 static void efx_start_datapath(struct efx_nic
*efx
)
627 bool old_rx_scatter
= efx
->rx_scatter
;
628 struct efx_tx_queue
*tx_queue
;
629 struct efx_rx_queue
*rx_queue
;
630 struct efx_channel
*channel
;
633 /* Calculate the rx buffer allocation parameters required to
634 * support the current MTU, including padding for header
635 * alignment and overruns.
637 efx
->rx_dma_len
= (efx
->type
->rx_buffer_hash_size
+
638 EFX_MAX_FRAME_LEN(efx
->net_dev
->mtu
) +
639 efx
->type
->rx_buffer_padding
);
640 rx_buf_len
= (sizeof(struct efx_rx_page_state
) +
641 EFX_PAGE_IP_ALIGN
+ efx
->rx_dma_len
);
642 if (rx_buf_len
<= PAGE_SIZE
) {
643 efx
->rx_scatter
= false;
644 efx
->rx_buffer_order
= 0;
645 } else if (efx
->type
->can_rx_scatter
) {
646 BUILD_BUG_ON(sizeof(struct efx_rx_page_state
) +
647 EFX_PAGE_IP_ALIGN
+ EFX_RX_USR_BUF_SIZE
>
649 efx
->rx_scatter
= true;
650 efx
->rx_dma_len
= EFX_RX_USR_BUF_SIZE
;
651 efx
->rx_buffer_order
= 0;
653 efx
->rx_scatter
= false;
654 efx
->rx_buffer_order
= get_order(rx_buf_len
);
657 efx_rx_config_page_split(efx
);
658 if (efx
->rx_buffer_order
)
659 netif_dbg(efx
, drv
, efx
->net_dev
,
660 "RX buf len=%u; page order=%u batch=%u\n",
661 efx
->rx_dma_len
, efx
->rx_buffer_order
,
662 efx
->rx_pages_per_batch
);
664 netif_dbg(efx
, drv
, efx
->net_dev
,
665 "RX buf len=%u step=%u bpp=%u; page batch=%u\n",
666 efx
->rx_dma_len
, efx
->rx_page_buf_step
,
667 efx
->rx_bufs_per_page
, efx
->rx_pages_per_batch
);
669 /* RX filters also have scatter-enabled flags */
670 if (efx
->rx_scatter
!= old_rx_scatter
)
671 efx_filter_update_rx_scatter(efx
);
673 /* We must keep at least one descriptor in a TX ring empty.
674 * We could avoid this when the queue size does not exactly
675 * match the hardware ring size, but it's not that important.
676 * Therefore we stop the queue when one more skb might fill
677 * the ring completely. We wake it when half way back to
680 efx
->txq_stop_thresh
= efx
->txq_entries
- efx_tx_max_skb_descs(efx
);
681 efx
->txq_wake_thresh
= efx
->txq_stop_thresh
/ 2;
683 /* Initialise the channels */
684 efx_for_each_channel(channel
, efx
) {
685 efx_for_each_channel_tx_queue(tx_queue
, channel
)
686 efx_init_tx_queue(tx_queue
);
688 efx_for_each_channel_rx_queue(rx_queue
, channel
) {
689 efx_init_rx_queue(rx_queue
);
690 efx_nic_generate_fill_event(rx_queue
);
693 WARN_ON(channel
->rx_pkt_n_frags
);
696 if (netif_device_present(efx
->net_dev
))
697 netif_tx_wake_all_queues(efx
->net_dev
);
700 static void efx_stop_datapath(struct efx_nic
*efx
)
702 struct efx_channel
*channel
;
703 struct efx_tx_queue
*tx_queue
;
704 struct efx_rx_queue
*rx_queue
;
705 struct pci_dev
*dev
= efx
->pci_dev
;
708 EFX_ASSERT_RESET_SERIALISED(efx
);
709 BUG_ON(efx
->port_enabled
);
711 /* Only perform flush if dma is enabled */
712 if (dev
->is_busmaster
&& efx
->state
!= STATE_RECOVERY
) {
713 rc
= efx_nic_flush_queues(efx
);
715 if (rc
&& EFX_WORKAROUND_7803(efx
)) {
716 /* Schedule a reset to recover from the flush failure. The
717 * descriptor caches reference memory we're about to free,
718 * but falcon_reconfigure_mac_wrapper() won't reconnect
719 * the MACs because of the pending reset. */
720 netif_err(efx
, drv
, efx
->net_dev
,
721 "Resetting to recover from flush failure\n");
722 efx_schedule_reset(efx
, RESET_TYPE_ALL
);
724 netif_err(efx
, drv
, efx
->net_dev
, "failed to flush queues\n");
726 netif_dbg(efx
, drv
, efx
->net_dev
,
727 "successfully flushed all queues\n");
731 efx_for_each_channel(channel
, efx
) {
732 /* RX packet processing is pipelined, so wait for the
733 * NAPI handler to complete. At least event queue 0
734 * might be kept active by non-data events, so don't
735 * use napi_synchronize() but actually disable NAPI
738 if (efx_channel_has_rx_queue(channel
)) {
739 efx_stop_eventq(channel
);
740 efx_start_eventq(channel
);
743 efx_for_each_channel_rx_queue(rx_queue
, channel
)
744 efx_fini_rx_queue(rx_queue
);
745 efx_for_each_possible_channel_tx_queue(tx_queue
, channel
)
746 efx_fini_tx_queue(tx_queue
);
750 static void efx_remove_channel(struct efx_channel
*channel
)
752 struct efx_tx_queue
*tx_queue
;
753 struct efx_rx_queue
*rx_queue
;
755 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
756 "destroy chan %d\n", channel
->channel
);
758 efx_for_each_channel_rx_queue(rx_queue
, channel
)
759 efx_remove_rx_queue(rx_queue
);
760 efx_for_each_possible_channel_tx_queue(tx_queue
, channel
)
761 efx_remove_tx_queue(tx_queue
);
762 efx_remove_eventq(channel
);
763 channel
->type
->post_remove(channel
);
766 static void efx_remove_channels(struct efx_nic
*efx
)
768 struct efx_channel
*channel
;
770 efx_for_each_channel(channel
, efx
)
771 efx_remove_channel(channel
);
775 efx_realloc_channels(struct efx_nic
*efx
, u32 rxq_entries
, u32 txq_entries
)
777 struct efx_channel
*other_channel
[EFX_MAX_CHANNELS
], *channel
;
778 u32 old_rxq_entries
, old_txq_entries
;
779 unsigned i
, next_buffer_table
= 0;
782 rc
= efx_check_disabled(efx
);
786 /* Not all channels should be reallocated. We must avoid
787 * reallocating their buffer table entries.
789 efx_for_each_channel(channel
, efx
) {
790 struct efx_rx_queue
*rx_queue
;
791 struct efx_tx_queue
*tx_queue
;
793 if (channel
->type
->copy
)
795 next_buffer_table
= max(next_buffer_table
,
796 channel
->eventq
.index
+
797 channel
->eventq
.entries
);
798 efx_for_each_channel_rx_queue(rx_queue
, channel
)
799 next_buffer_table
= max(next_buffer_table
,
800 rx_queue
->rxd
.index
+
801 rx_queue
->rxd
.entries
);
802 efx_for_each_channel_tx_queue(tx_queue
, channel
)
803 next_buffer_table
= max(next_buffer_table
,
804 tx_queue
->txd
.index
+
805 tx_queue
->txd
.entries
);
808 efx_device_detach_sync(efx
);
810 efx_stop_interrupts(efx
, true);
812 /* Clone channels (where possible) */
813 memset(other_channel
, 0, sizeof(other_channel
));
814 for (i
= 0; i
< efx
->n_channels
; i
++) {
815 channel
= efx
->channel
[i
];
816 if (channel
->type
->copy
)
817 channel
= channel
->type
->copy(channel
);
822 other_channel
[i
] = channel
;
825 /* Swap entry counts and channel pointers */
826 old_rxq_entries
= efx
->rxq_entries
;
827 old_txq_entries
= efx
->txq_entries
;
828 efx
->rxq_entries
= rxq_entries
;
829 efx
->txq_entries
= txq_entries
;
830 for (i
= 0; i
< efx
->n_channels
; i
++) {
831 channel
= efx
->channel
[i
];
832 efx
->channel
[i
] = other_channel
[i
];
833 other_channel
[i
] = channel
;
836 /* Restart buffer table allocation */
837 efx
->next_buffer_table
= next_buffer_table
;
839 for (i
= 0; i
< efx
->n_channels
; i
++) {
840 channel
= efx
->channel
[i
];
841 if (!channel
->type
->copy
)
843 rc
= efx_probe_channel(channel
);
846 efx_init_napi_channel(efx
->channel
[i
]);
850 /* Destroy unused channel structures */
851 for (i
= 0; i
< efx
->n_channels
; i
++) {
852 channel
= other_channel
[i
];
853 if (channel
&& channel
->type
->copy
) {
854 efx_fini_napi_channel(channel
);
855 efx_remove_channel(channel
);
860 efx_start_interrupts(efx
, true);
862 netif_device_attach(efx
->net_dev
);
867 efx
->rxq_entries
= old_rxq_entries
;
868 efx
->txq_entries
= old_txq_entries
;
869 for (i
= 0; i
< efx
->n_channels
; i
++) {
870 channel
= efx
->channel
[i
];
871 efx
->channel
[i
] = other_channel
[i
];
872 other_channel
[i
] = channel
;
877 void efx_schedule_slow_fill(struct efx_rx_queue
*rx_queue
)
879 mod_timer(&rx_queue
->slow_fill
, jiffies
+ msecs_to_jiffies(100));
882 static const struct efx_channel_type efx_default_channel_type
= {
883 .pre_probe
= efx_channel_dummy_op_int
,
884 .post_remove
= efx_channel_dummy_op_void
,
885 .get_name
= efx_get_channel_name
,
886 .copy
= efx_copy_channel
,
887 .keep_eventq
= false,
890 int efx_channel_dummy_op_int(struct efx_channel
*channel
)
895 void efx_channel_dummy_op_void(struct efx_channel
*channel
)
899 /**************************************************************************
903 **************************************************************************/
905 /* This ensures that the kernel is kept informed (via
906 * netif_carrier_on/off) of the link status, and also maintains the
907 * link status's stop on the port's TX queue.
909 void efx_link_status_changed(struct efx_nic
*efx
)
911 struct efx_link_state
*link_state
= &efx
->link_state
;
913 /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
914 * that no events are triggered between unregister_netdev() and the
915 * driver unloading. A more general condition is that NETDEV_CHANGE
916 * can only be generated between NETDEV_UP and NETDEV_DOWN */
917 if (!netif_running(efx
->net_dev
))
920 if (link_state
->up
!= netif_carrier_ok(efx
->net_dev
)) {
921 efx
->n_link_state_changes
++;
924 netif_carrier_on(efx
->net_dev
);
926 netif_carrier_off(efx
->net_dev
);
929 /* Status message for kernel log */
931 netif_info(efx
, link
, efx
->net_dev
,
932 "link up at %uMbps %s-duplex (MTU %d)%s\n",
933 link_state
->speed
, link_state
->fd
? "full" : "half",
935 (efx
->promiscuous
? " [PROMISC]" : ""));
937 netif_info(efx
, link
, efx
->net_dev
, "link down\n");
940 void efx_link_set_advertising(struct efx_nic
*efx
, u32 advertising
)
942 efx
->link_advertising
= advertising
;
944 if (advertising
& ADVERTISED_Pause
)
945 efx
->wanted_fc
|= (EFX_FC_TX
| EFX_FC_RX
);
947 efx
->wanted_fc
&= ~(EFX_FC_TX
| EFX_FC_RX
);
948 if (advertising
& ADVERTISED_Asym_Pause
)
949 efx
->wanted_fc
^= EFX_FC_TX
;
953 void efx_link_set_wanted_fc(struct efx_nic
*efx
, u8 wanted_fc
)
955 efx
->wanted_fc
= wanted_fc
;
956 if (efx
->link_advertising
) {
957 if (wanted_fc
& EFX_FC_RX
)
958 efx
->link_advertising
|= (ADVERTISED_Pause
|
959 ADVERTISED_Asym_Pause
);
961 efx
->link_advertising
&= ~(ADVERTISED_Pause
|
962 ADVERTISED_Asym_Pause
);
963 if (wanted_fc
& EFX_FC_TX
)
964 efx
->link_advertising
^= ADVERTISED_Asym_Pause
;
968 static void efx_fini_port(struct efx_nic
*efx
);
970 /* Push loopback/power/transmit disable settings to the PHY, and reconfigure
971 * the MAC appropriately. All other PHY configuration changes are pushed
972 * through phy_op->set_settings(), and pushed asynchronously to the MAC
973 * through efx_monitor().
975 * Callers must hold the mac_lock
977 int __efx_reconfigure_port(struct efx_nic
*efx
)
979 enum efx_phy_mode phy_mode
;
982 WARN_ON(!mutex_is_locked(&efx
->mac_lock
));
984 /* Serialise the promiscuous flag with efx_set_rx_mode. */
985 netif_addr_lock_bh(efx
->net_dev
);
986 netif_addr_unlock_bh(efx
->net_dev
);
988 /* Disable PHY transmit in mac level loopbacks */
989 phy_mode
= efx
->phy_mode
;
990 if (LOOPBACK_INTERNAL(efx
))
991 efx
->phy_mode
|= PHY_MODE_TX_DISABLED
;
993 efx
->phy_mode
&= ~PHY_MODE_TX_DISABLED
;
995 rc
= efx
->type
->reconfigure_port(efx
);
998 efx
->phy_mode
= phy_mode
;
1003 /* Reinitialise the MAC to pick up new PHY settings, even if the port is
1005 int efx_reconfigure_port(struct efx_nic
*efx
)
1009 EFX_ASSERT_RESET_SERIALISED(efx
);
1011 mutex_lock(&efx
->mac_lock
);
1012 rc
= __efx_reconfigure_port(efx
);
1013 mutex_unlock(&efx
->mac_lock
);
1018 /* Asynchronous work item for changing MAC promiscuity and multicast
1019 * hash. Avoid a drain/rx_ingress enable by reconfiguring the current
1021 static void efx_mac_work(struct work_struct
*data
)
1023 struct efx_nic
*efx
= container_of(data
, struct efx_nic
, mac_work
);
1025 mutex_lock(&efx
->mac_lock
);
1026 if (efx
->port_enabled
)
1027 efx
->type
->reconfigure_mac(efx
);
1028 mutex_unlock(&efx
->mac_lock
);
1031 static int efx_probe_port(struct efx_nic
*efx
)
1035 netif_dbg(efx
, probe
, efx
->net_dev
, "create port\n");
1038 efx
->phy_mode
= PHY_MODE_SPECIAL
;
1040 /* Connect up MAC/PHY operations table */
1041 rc
= efx
->type
->probe_port(efx
);
1045 /* Initialise MAC address to permanent address */
1046 memcpy(efx
->net_dev
->dev_addr
, efx
->net_dev
->perm_addr
, ETH_ALEN
);
1051 static int efx_init_port(struct efx_nic
*efx
)
1055 netif_dbg(efx
, drv
, efx
->net_dev
, "init port\n");
1057 mutex_lock(&efx
->mac_lock
);
1059 rc
= efx
->phy_op
->init(efx
);
1063 efx
->port_initialized
= true;
1065 /* Reconfigure the MAC before creating dma queues (required for
1066 * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */
1067 efx
->type
->reconfigure_mac(efx
);
1069 /* Ensure the PHY advertises the correct flow control settings */
1070 rc
= efx
->phy_op
->reconfigure(efx
);
1074 mutex_unlock(&efx
->mac_lock
);
1078 efx
->phy_op
->fini(efx
);
1080 mutex_unlock(&efx
->mac_lock
);
1084 static void efx_start_port(struct efx_nic
*efx
)
1086 netif_dbg(efx
, ifup
, efx
->net_dev
, "start port\n");
1087 BUG_ON(efx
->port_enabled
);
1089 mutex_lock(&efx
->mac_lock
);
1090 efx
->port_enabled
= true;
1092 /* efx_mac_work() might have been scheduled after efx_stop_port(),
1093 * and then cancelled by efx_flush_all() */
1094 efx
->type
->reconfigure_mac(efx
);
1096 mutex_unlock(&efx
->mac_lock
);
1099 /* Prevent efx_mac_work() and efx_monitor() from working */
1100 static void efx_stop_port(struct efx_nic
*efx
)
1102 netif_dbg(efx
, ifdown
, efx
->net_dev
, "stop port\n");
1104 mutex_lock(&efx
->mac_lock
);
1105 efx
->port_enabled
= false;
1106 mutex_unlock(&efx
->mac_lock
);
1108 /* Serialise against efx_set_multicast_list() */
1109 netif_addr_lock_bh(efx
->net_dev
);
1110 netif_addr_unlock_bh(efx
->net_dev
);
1113 static void efx_fini_port(struct efx_nic
*efx
)
1115 netif_dbg(efx
, drv
, efx
->net_dev
, "shut down port\n");
1117 if (!efx
->port_initialized
)
1120 efx
->phy_op
->fini(efx
);
1121 efx
->port_initialized
= false;
1123 efx
->link_state
.up
= false;
1124 efx_link_status_changed(efx
);
1127 static void efx_remove_port(struct efx_nic
*efx
)
1129 netif_dbg(efx
, drv
, efx
->net_dev
, "destroying port\n");
1131 efx
->type
->remove_port(efx
);
1134 /**************************************************************************
1138 **************************************************************************/
1140 /* This configures the PCI device to enable I/O and DMA. */
1141 static int efx_init_io(struct efx_nic
*efx
)
1143 struct pci_dev
*pci_dev
= efx
->pci_dev
;
1144 dma_addr_t dma_mask
= efx
->type
->max_dma_mask
;
1147 netif_dbg(efx
, probe
, efx
->net_dev
, "initialising I/O\n");
1149 rc
= pci_enable_device(pci_dev
);
1151 netif_err(efx
, probe
, efx
->net_dev
,
1152 "failed to enable PCI device\n");
1156 pci_set_master(pci_dev
);
1158 /* Set the PCI DMA mask. Try all possibilities from our
1159 * genuine mask down to 32 bits, because some architectures
1160 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
1161 * masks event though they reject 46 bit masks.
1163 while (dma_mask
> 0x7fffffffUL
) {
1164 if (dma_supported(&pci_dev
->dev
, dma_mask
)) {
1165 rc
= dma_set_mask(&pci_dev
->dev
, dma_mask
);
1172 netif_err(efx
, probe
, efx
->net_dev
,
1173 "could not find a suitable DMA mask\n");
1176 netif_dbg(efx
, probe
, efx
->net_dev
,
1177 "using DMA mask %llx\n", (unsigned long long) dma_mask
);
1178 rc
= dma_set_coherent_mask(&pci_dev
->dev
, dma_mask
);
1180 /* dma_set_coherent_mask() is not *allowed* to
1181 * fail with a mask that dma_set_mask() accepted,
1182 * but just in case...
1184 netif_err(efx
, probe
, efx
->net_dev
,
1185 "failed to set consistent DMA mask\n");
1189 efx
->membase_phys
= pci_resource_start(efx
->pci_dev
, EFX_MEM_BAR
);
1190 rc
= pci_request_region(pci_dev
, EFX_MEM_BAR
, "sfc");
1192 netif_err(efx
, probe
, efx
->net_dev
,
1193 "request for memory BAR failed\n");
1197 efx
->membase
= ioremap_nocache(efx
->membase_phys
,
1198 efx
->type
->mem_map_size
);
1199 if (!efx
->membase
) {
1200 netif_err(efx
, probe
, efx
->net_dev
,
1201 "could not map memory BAR at %llx+%x\n",
1202 (unsigned long long)efx
->membase_phys
,
1203 efx
->type
->mem_map_size
);
1207 netif_dbg(efx
, probe
, efx
->net_dev
,
1208 "memory BAR at %llx+%x (virtual %p)\n",
1209 (unsigned long long)efx
->membase_phys
,
1210 efx
->type
->mem_map_size
, efx
->membase
);
1215 pci_release_region(efx
->pci_dev
, EFX_MEM_BAR
);
1217 efx
->membase_phys
= 0;
1219 pci_disable_device(efx
->pci_dev
);
1224 static void efx_fini_io(struct efx_nic
*efx
)
1226 netif_dbg(efx
, drv
, efx
->net_dev
, "shutting down I/O\n");
1229 iounmap(efx
->membase
);
1230 efx
->membase
= NULL
;
1233 if (efx
->membase_phys
) {
1234 pci_release_region(efx
->pci_dev
, EFX_MEM_BAR
);
1235 efx
->membase_phys
= 0;
1238 pci_disable_device(efx
->pci_dev
);
1241 static unsigned int efx_wanted_parallelism(struct efx_nic
*efx
)
1243 cpumask_var_t thread_mask
;
1250 if (unlikely(!zalloc_cpumask_var(&thread_mask
, GFP_KERNEL
))) {
1251 netif_warn(efx
, probe
, efx
->net_dev
,
1252 "RSS disabled due to allocation failure\n");
1257 for_each_online_cpu(cpu
) {
1258 if (!cpumask_test_cpu(cpu
, thread_mask
)) {
1260 cpumask_or(thread_mask
, thread_mask
,
1261 topology_thread_cpumask(cpu
));
1265 free_cpumask_var(thread_mask
);
1268 /* If RSS is requested for the PF *and* VFs then we can't write RSS
1269 * table entries that are inaccessible to VFs
1271 if (efx_sriov_wanted(efx
) && efx_vf_size(efx
) > 1 &&
1272 count
> efx_vf_size(efx
)) {
1273 netif_warn(efx
, probe
, efx
->net_dev
,
1274 "Reducing number of RSS channels from %u to %u for "
1275 "VF support. Increase vf-msix-limit to use more "
1276 "channels on the PF.\n",
1277 count
, efx_vf_size(efx
));
1278 count
= efx_vf_size(efx
);
1285 efx_init_rx_cpu_rmap(struct efx_nic
*efx
, struct msix_entry
*xentries
)
1287 #ifdef CONFIG_RFS_ACCEL
1291 efx
->net_dev
->rx_cpu_rmap
= alloc_irq_cpu_rmap(efx
->n_rx_channels
);
1292 if (!efx
->net_dev
->rx_cpu_rmap
)
1294 for (i
= 0; i
< efx
->n_rx_channels
; i
++) {
1295 rc
= irq_cpu_rmap_add(efx
->net_dev
->rx_cpu_rmap
,
1296 xentries
[i
].vector
);
1298 free_irq_cpu_rmap(efx
->net_dev
->rx_cpu_rmap
);
1299 efx
->net_dev
->rx_cpu_rmap
= NULL
;
1307 /* Probe the number and type of interrupts we are able to obtain, and
1308 * the resulting numbers of channels and RX queues.
1310 static int efx_probe_interrupts(struct efx_nic
*efx
)
1312 unsigned int max_channels
=
1313 min(efx
->type
->phys_addr_channels
, EFX_MAX_CHANNELS
);
1314 unsigned int extra_channels
= 0;
1318 for (i
= 0; i
< EFX_MAX_EXTRA_CHANNELS
; i
++)
1319 if (efx
->extra_channel_type
[i
])
1322 if (efx
->interrupt_mode
== EFX_INT_MODE_MSIX
) {
1323 struct msix_entry xentries
[EFX_MAX_CHANNELS
];
1324 unsigned int n_channels
;
1326 n_channels
= efx_wanted_parallelism(efx
);
1327 if (separate_tx_channels
)
1329 n_channels
+= extra_channels
;
1330 n_channels
= min(n_channels
, max_channels
);
1332 for (i
= 0; i
< n_channels
; i
++)
1333 xentries
[i
].entry
= i
;
1334 rc
= pci_enable_msix(efx
->pci_dev
, xentries
, n_channels
);
1336 netif_err(efx
, drv
, efx
->net_dev
,
1337 "WARNING: Insufficient MSI-X vectors"
1338 " available (%d < %u).\n", rc
, n_channels
);
1339 netif_err(efx
, drv
, efx
->net_dev
,
1340 "WARNING: Performance may be reduced.\n");
1341 EFX_BUG_ON_PARANOID(rc
>= n_channels
);
1343 rc
= pci_enable_msix(efx
->pci_dev
, xentries
,
1348 efx
->n_channels
= n_channels
;
1349 if (n_channels
> extra_channels
)
1350 n_channels
-= extra_channels
;
1351 if (separate_tx_channels
) {
1352 efx
->n_tx_channels
= max(n_channels
/ 2, 1U);
1353 efx
->n_rx_channels
= max(n_channels
-
1357 efx
->n_tx_channels
= n_channels
;
1358 efx
->n_rx_channels
= n_channels
;
1360 rc
= efx_init_rx_cpu_rmap(efx
, xentries
);
1362 pci_disable_msix(efx
->pci_dev
);
1365 for (i
= 0; i
< efx
->n_channels
; i
++)
1366 efx_get_channel(efx
, i
)->irq
=
1369 /* Fall back to single channel MSI */
1370 efx
->interrupt_mode
= EFX_INT_MODE_MSI
;
1371 netif_err(efx
, drv
, efx
->net_dev
,
1372 "could not enable MSI-X\n");
1376 /* Try single interrupt MSI */
1377 if (efx
->interrupt_mode
== EFX_INT_MODE_MSI
) {
1378 efx
->n_channels
= 1;
1379 efx
->n_rx_channels
= 1;
1380 efx
->n_tx_channels
= 1;
1381 rc
= pci_enable_msi(efx
->pci_dev
);
1383 efx_get_channel(efx
, 0)->irq
= efx
->pci_dev
->irq
;
1385 netif_err(efx
, drv
, efx
->net_dev
,
1386 "could not enable MSI\n");
1387 efx
->interrupt_mode
= EFX_INT_MODE_LEGACY
;
1391 /* Assume legacy interrupts */
1392 if (efx
->interrupt_mode
== EFX_INT_MODE_LEGACY
) {
1393 efx
->n_channels
= 1 + (separate_tx_channels
? 1 : 0);
1394 efx
->n_rx_channels
= 1;
1395 efx
->n_tx_channels
= 1;
1396 efx
->legacy_irq
= efx
->pci_dev
->irq
;
1399 /* Assign extra channels if possible */
1400 j
= efx
->n_channels
;
1401 for (i
= 0; i
< EFX_MAX_EXTRA_CHANNELS
; i
++) {
1402 if (!efx
->extra_channel_type
[i
])
1404 if (efx
->interrupt_mode
!= EFX_INT_MODE_MSIX
||
1405 efx
->n_channels
<= extra_channels
) {
1406 efx
->extra_channel_type
[i
]->handle_no_channel(efx
);
1409 efx_get_channel(efx
, j
)->type
=
1410 efx
->extra_channel_type
[i
];
1414 /* RSS might be usable on VFs even if it is disabled on the PF */
1415 efx
->rss_spread
= ((efx
->n_rx_channels
> 1 || !efx_sriov_wanted(efx
)) ?
1416 efx
->n_rx_channels
: efx_vf_size(efx
));
1421 /* Enable interrupts, then probe and start the event queues */
1422 static void efx_start_interrupts(struct efx_nic
*efx
, bool may_keep_eventq
)
1424 struct efx_channel
*channel
;
1426 BUG_ON(efx
->state
== STATE_DISABLED
);
1428 if (efx
->legacy_irq
)
1429 efx
->legacy_irq_enabled
= true;
1430 efx_nic_enable_interrupts(efx
);
1432 efx_for_each_channel(channel
, efx
) {
1433 if (!channel
->type
->keep_eventq
|| !may_keep_eventq
)
1434 efx_init_eventq(channel
);
1435 efx_start_eventq(channel
);
1438 efx_mcdi_mode_event(efx
);
1441 static void efx_stop_interrupts(struct efx_nic
*efx
, bool may_keep_eventq
)
1443 struct efx_channel
*channel
;
1445 if (efx
->state
== STATE_DISABLED
)
1448 efx_mcdi_mode_poll(efx
);
1450 efx_nic_disable_interrupts(efx
);
1451 if (efx
->legacy_irq
) {
1452 synchronize_irq(efx
->legacy_irq
);
1453 efx
->legacy_irq_enabled
= false;
1456 efx_for_each_channel(channel
, efx
) {
1458 synchronize_irq(channel
->irq
);
1460 efx_stop_eventq(channel
);
1461 if (!channel
->type
->keep_eventq
|| !may_keep_eventq
)
1462 efx_fini_eventq(channel
);
1466 static void efx_remove_interrupts(struct efx_nic
*efx
)
1468 struct efx_channel
*channel
;
1470 /* Remove MSI/MSI-X interrupts */
1471 efx_for_each_channel(channel
, efx
)
1473 pci_disable_msi(efx
->pci_dev
);
1474 pci_disable_msix(efx
->pci_dev
);
1476 /* Remove legacy interrupt */
1477 efx
->legacy_irq
= 0;
1480 static void efx_set_channels(struct efx_nic
*efx
)
1482 struct efx_channel
*channel
;
1483 struct efx_tx_queue
*tx_queue
;
1485 efx
->tx_channel_offset
=
1486 separate_tx_channels
? efx
->n_channels
- efx
->n_tx_channels
: 0;
1488 /* We need to mark which channels really have RX and TX
1489 * queues, and adjust the TX queue numbers if we have separate
1490 * RX-only and TX-only channels.
1492 efx_for_each_channel(channel
, efx
) {
1493 if (channel
->channel
< efx
->n_rx_channels
)
1494 channel
->rx_queue
.core_index
= channel
->channel
;
1496 channel
->rx_queue
.core_index
= -1;
1498 efx_for_each_channel_tx_queue(tx_queue
, channel
)
1499 tx_queue
->queue
-= (efx
->tx_channel_offset
*
1504 static int efx_probe_nic(struct efx_nic
*efx
)
1509 netif_dbg(efx
, probe
, efx
->net_dev
, "creating NIC\n");
1511 /* Carry out hardware-type specific initialisation */
1512 rc
= efx
->type
->probe(efx
);
1516 /* Determine the number of channels and queues by trying to hook
1517 * in MSI-X interrupts. */
1518 rc
= efx_probe_interrupts(efx
);
1522 efx
->type
->dimension_resources(efx
);
1524 if (efx
->n_channels
> 1)
1525 get_random_bytes(&efx
->rx_hash_key
, sizeof(efx
->rx_hash_key
));
1526 for (i
= 0; i
< ARRAY_SIZE(efx
->rx_indir_table
); i
++)
1527 efx
->rx_indir_table
[i
] =
1528 ethtool_rxfh_indir_default(i
, efx
->rss_spread
);
1530 efx_set_channels(efx
);
1531 netif_set_real_num_tx_queues(efx
->net_dev
, efx
->n_tx_channels
);
1532 netif_set_real_num_rx_queues(efx
->net_dev
, efx
->n_rx_channels
);
1534 /* Initialise the interrupt moderation settings */
1535 efx_init_irq_moderation(efx
, tx_irq_mod_usec
, rx_irq_mod_usec
, true,
1541 efx
->type
->remove(efx
);
1545 static void efx_remove_nic(struct efx_nic
*efx
)
1547 netif_dbg(efx
, drv
, efx
->net_dev
, "destroying NIC\n");
1549 efx_remove_interrupts(efx
);
1550 efx
->type
->remove(efx
);
1553 /**************************************************************************
1555 * NIC startup/shutdown
1557 *************************************************************************/
1559 static int efx_probe_all(struct efx_nic
*efx
)
1563 rc
= efx_probe_nic(efx
);
1565 netif_err(efx
, probe
, efx
->net_dev
, "failed to create NIC\n");
1569 rc
= efx_probe_port(efx
);
1571 netif_err(efx
, probe
, efx
->net_dev
, "failed to create port\n");
1575 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE
< EFX_RXQ_MIN_ENT
);
1576 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE
< EFX_TXQ_MIN_ENT(efx
))) {
1580 efx
->rxq_entries
= efx
->txq_entries
= EFX_DEFAULT_DMAQ_SIZE
;
1582 rc
= efx_probe_filters(efx
);
1584 netif_err(efx
, probe
, efx
->net_dev
,
1585 "failed to create filter tables\n");
1589 rc
= efx_probe_channels(efx
);
1596 efx_remove_filters(efx
);
1598 efx_remove_port(efx
);
1600 efx_remove_nic(efx
);
1605 /* If the interface is supposed to be running but is not, start
1606 * the hardware and software data path, regular activity for the port
1607 * (MAC statistics, link polling, etc.) and schedule the port to be
1608 * reconfigured. Interrupts must already be enabled. This function
1609 * is safe to call multiple times, so long as the NIC is not disabled.
1610 * Requires the RTNL lock.
1612 static void efx_start_all(struct efx_nic
*efx
)
1614 EFX_ASSERT_RESET_SERIALISED(efx
);
1615 BUG_ON(efx
->state
== STATE_DISABLED
);
1617 /* Check that it is appropriate to restart the interface. All
1618 * of these flags are safe to read under just the rtnl lock */
1619 if (efx
->port_enabled
|| !netif_running(efx
->net_dev
))
1622 efx_start_port(efx
);
1623 efx_start_datapath(efx
);
1625 /* Start the hardware monitor if there is one */
1626 if (efx
->type
->monitor
!= NULL
)
1627 queue_delayed_work(efx
->workqueue
, &efx
->monitor_work
,
1628 efx_monitor_interval
);
1630 /* If link state detection is normally event-driven, we have
1631 * to poll now because we could have missed a change
1633 if (efx_nic_rev(efx
) >= EFX_REV_SIENA_A0
) {
1634 mutex_lock(&efx
->mac_lock
);
1635 if (efx
->phy_op
->poll(efx
))
1636 efx_link_status_changed(efx
);
1637 mutex_unlock(&efx
->mac_lock
);
1640 efx
->type
->start_stats(efx
);
1643 /* Flush all delayed work. Should only be called when no more delayed work
1644 * will be scheduled. This doesn't flush pending online resets (efx_reset),
1645 * since we're holding the rtnl_lock at this point. */
1646 static void efx_flush_all(struct efx_nic
*efx
)
1648 /* Make sure the hardware monitor and event self-test are stopped */
1649 cancel_delayed_work_sync(&efx
->monitor_work
);
1650 efx_selftest_async_cancel(efx
);
1651 /* Stop scheduled port reconfigurations */
1652 cancel_work_sync(&efx
->mac_work
);
1655 /* Quiesce the hardware and software data path, and regular activity
1656 * for the port without bringing the link down. Safe to call multiple
1657 * times with the NIC in almost any state, but interrupts should be
1658 * enabled. Requires the RTNL lock.
1660 static void efx_stop_all(struct efx_nic
*efx
)
1662 EFX_ASSERT_RESET_SERIALISED(efx
);
1664 /* port_enabled can be read safely under the rtnl lock */
1665 if (!efx
->port_enabled
)
1668 efx
->type
->stop_stats(efx
);
1671 /* Flush efx_mac_work(), refill_workqueue, monitor_work */
1674 /* Stop the kernel transmit interface. This is only valid if
1675 * the device is stopped or detached; otherwise the watchdog
1676 * may fire immediately.
1678 WARN_ON(netif_running(efx
->net_dev
) &&
1679 netif_device_present(efx
->net_dev
));
1680 netif_tx_disable(efx
->net_dev
);
1682 efx_stop_datapath(efx
);
1685 static void efx_remove_all(struct efx_nic
*efx
)
1687 efx_remove_channels(efx
);
1688 efx_remove_filters(efx
);
1689 efx_remove_port(efx
);
1690 efx_remove_nic(efx
);
1693 /**************************************************************************
1695 * Interrupt moderation
1697 **************************************************************************/
1699 static unsigned int irq_mod_ticks(unsigned int usecs
, unsigned int quantum_ns
)
1703 if (usecs
* 1000 < quantum_ns
)
1704 return 1; /* never round down to 0 */
1705 return usecs
* 1000 / quantum_ns
;
1708 /* Set interrupt moderation parameters */
1709 int efx_init_irq_moderation(struct efx_nic
*efx
, unsigned int tx_usecs
,
1710 unsigned int rx_usecs
, bool rx_adaptive
,
1711 bool rx_may_override_tx
)
1713 struct efx_channel
*channel
;
1714 unsigned int irq_mod_max
= DIV_ROUND_UP(efx
->type
->timer_period_max
*
1715 efx
->timer_quantum_ns
,
1717 unsigned int tx_ticks
;
1718 unsigned int rx_ticks
;
1720 EFX_ASSERT_RESET_SERIALISED(efx
);
1722 if (tx_usecs
> irq_mod_max
|| rx_usecs
> irq_mod_max
)
1725 tx_ticks
= irq_mod_ticks(tx_usecs
, efx
->timer_quantum_ns
);
1726 rx_ticks
= irq_mod_ticks(rx_usecs
, efx
->timer_quantum_ns
);
1728 if (tx_ticks
!= rx_ticks
&& efx
->tx_channel_offset
== 0 &&
1729 !rx_may_override_tx
) {
1730 netif_err(efx
, drv
, efx
->net_dev
, "Channels are shared. "
1731 "RX and TX IRQ moderation must be equal\n");
1735 efx
->irq_rx_adaptive
= rx_adaptive
;
1736 efx
->irq_rx_moderation
= rx_ticks
;
1737 efx_for_each_channel(channel
, efx
) {
1738 if (efx_channel_has_rx_queue(channel
))
1739 channel
->irq_moderation
= rx_ticks
;
1740 else if (efx_channel_has_tx_queues(channel
))
1741 channel
->irq_moderation
= tx_ticks
;
1747 void efx_get_irq_moderation(struct efx_nic
*efx
, unsigned int *tx_usecs
,
1748 unsigned int *rx_usecs
, bool *rx_adaptive
)
1750 /* We must round up when converting ticks to microseconds
1751 * because we round down when converting the other way.
1754 *rx_adaptive
= efx
->irq_rx_adaptive
;
1755 *rx_usecs
= DIV_ROUND_UP(efx
->irq_rx_moderation
*
1756 efx
->timer_quantum_ns
,
1759 /* If channels are shared between RX and TX, so is IRQ
1760 * moderation. Otherwise, IRQ moderation is the same for all
1761 * TX channels and is not adaptive.
1763 if (efx
->tx_channel_offset
== 0)
1764 *tx_usecs
= *rx_usecs
;
1766 *tx_usecs
= DIV_ROUND_UP(
1767 efx
->channel
[efx
->tx_channel_offset
]->irq_moderation
*
1768 efx
->timer_quantum_ns
,
1772 /**************************************************************************
1776 **************************************************************************/
1778 /* Run periodically off the general workqueue */
1779 static void efx_monitor(struct work_struct
*data
)
1781 struct efx_nic
*efx
= container_of(data
, struct efx_nic
,
1784 netif_vdbg(efx
, timer
, efx
->net_dev
,
1785 "hardware monitor executing on CPU %d\n",
1786 raw_smp_processor_id());
1787 BUG_ON(efx
->type
->monitor
== NULL
);
1789 /* If the mac_lock is already held then it is likely a port
1790 * reconfiguration is already in place, which will likely do
1791 * most of the work of monitor() anyway. */
1792 if (mutex_trylock(&efx
->mac_lock
)) {
1793 if (efx
->port_enabled
)
1794 efx
->type
->monitor(efx
);
1795 mutex_unlock(&efx
->mac_lock
);
1798 queue_delayed_work(efx
->workqueue
, &efx
->monitor_work
,
1799 efx_monitor_interval
);
1802 /**************************************************************************
1806 *************************************************************************/
1809 * Context: process, rtnl_lock() held.
1811 static int efx_ioctl(struct net_device
*net_dev
, struct ifreq
*ifr
, int cmd
)
1813 struct efx_nic
*efx
= netdev_priv(net_dev
);
1814 struct mii_ioctl_data
*data
= if_mii(ifr
);
1816 if (cmd
== SIOCSHWTSTAMP
)
1817 return efx_ptp_ioctl(efx
, ifr
, cmd
);
1819 /* Convert phy_id from older PRTAD/DEVAD format */
1820 if ((cmd
== SIOCGMIIREG
|| cmd
== SIOCSMIIREG
) &&
1821 (data
->phy_id
& 0xfc00) == 0x0400)
1822 data
->phy_id
^= MDIO_PHY_ID_C45
| 0x0400;
1824 return mdio_mii_ioctl(&efx
->mdio
, data
, cmd
);
1827 /**************************************************************************
1831 **************************************************************************/
1833 static void efx_init_napi_channel(struct efx_channel
*channel
)
1835 struct efx_nic
*efx
= channel
->efx
;
1837 channel
->napi_dev
= efx
->net_dev
;
1838 netif_napi_add(channel
->napi_dev
, &channel
->napi_str
,
1839 efx_poll
, napi_weight
);
1842 static void efx_init_napi(struct efx_nic
*efx
)
1844 struct efx_channel
*channel
;
1846 efx_for_each_channel(channel
, efx
)
1847 efx_init_napi_channel(channel
);
1850 static void efx_fini_napi_channel(struct efx_channel
*channel
)
1852 if (channel
->napi_dev
)
1853 netif_napi_del(&channel
->napi_str
);
1854 channel
->napi_dev
= NULL
;
1857 static void efx_fini_napi(struct efx_nic
*efx
)
1859 struct efx_channel
*channel
;
1861 efx_for_each_channel(channel
, efx
)
1862 efx_fini_napi_channel(channel
);
1865 /**************************************************************************
1867 * Kernel netpoll interface
1869 *************************************************************************/
1871 #ifdef CONFIG_NET_POLL_CONTROLLER
1873 /* Although in the common case interrupts will be disabled, this is not
1874 * guaranteed. However, all our work happens inside the NAPI callback,
1875 * so no locking is required.
1877 static void efx_netpoll(struct net_device
*net_dev
)
1879 struct efx_nic
*efx
= netdev_priv(net_dev
);
1880 struct efx_channel
*channel
;
1882 efx_for_each_channel(channel
, efx
)
1883 efx_schedule_channel(channel
);
1888 /**************************************************************************
1890 * Kernel net device interface
1892 *************************************************************************/
1894 /* Context: process, rtnl_lock() held. */
1895 static int efx_net_open(struct net_device
*net_dev
)
1897 struct efx_nic
*efx
= netdev_priv(net_dev
);
1900 netif_dbg(efx
, ifup
, efx
->net_dev
, "opening device on CPU %d\n",
1901 raw_smp_processor_id());
1903 rc
= efx_check_disabled(efx
);
1906 if (efx
->phy_mode
& PHY_MODE_SPECIAL
)
1908 if (efx_mcdi_poll_reboot(efx
) && efx_reset(efx
, RESET_TYPE_ALL
))
1911 /* Notify the kernel of the link state polled during driver load,
1912 * before the monitor starts running */
1913 efx_link_status_changed(efx
);
1916 efx_selftest_async_start(efx
);
1920 /* Context: process, rtnl_lock() held.
1921 * Note that the kernel will ignore our return code; this method
1922 * should really be a void.
1924 static int efx_net_stop(struct net_device
*net_dev
)
1926 struct efx_nic
*efx
= netdev_priv(net_dev
);
1928 netif_dbg(efx
, ifdown
, efx
->net_dev
, "closing on CPU %d\n",
1929 raw_smp_processor_id());
1931 /* Stop the device and flush all the channels */
1937 /* Context: process, dev_base_lock or RTNL held, non-blocking. */
1938 static struct rtnl_link_stats64
*efx_net_stats(struct net_device
*net_dev
,
1939 struct rtnl_link_stats64
*stats
)
1941 struct efx_nic
*efx
= netdev_priv(net_dev
);
1942 struct efx_mac_stats
*mac_stats
= &efx
->mac_stats
;
1944 spin_lock_bh(&efx
->stats_lock
);
1946 efx
->type
->update_stats(efx
);
1948 stats
->rx_packets
= mac_stats
->rx_packets
;
1949 stats
->tx_packets
= mac_stats
->tx_packets
;
1950 stats
->rx_bytes
= mac_stats
->rx_bytes
;
1951 stats
->tx_bytes
= mac_stats
->tx_bytes
;
1952 stats
->rx_dropped
= efx
->n_rx_nodesc_drop_cnt
;
1953 stats
->multicast
= mac_stats
->rx_multicast
;
1954 stats
->collisions
= mac_stats
->tx_collision
;
1955 stats
->rx_length_errors
= (mac_stats
->rx_gtjumbo
+
1956 mac_stats
->rx_length_error
);
1957 stats
->rx_crc_errors
= mac_stats
->rx_bad
;
1958 stats
->rx_frame_errors
= mac_stats
->rx_align_error
;
1959 stats
->rx_fifo_errors
= mac_stats
->rx_overflow
;
1960 stats
->rx_missed_errors
= mac_stats
->rx_missed
;
1961 stats
->tx_window_errors
= mac_stats
->tx_late_collision
;
1963 stats
->rx_errors
= (stats
->rx_length_errors
+
1964 stats
->rx_crc_errors
+
1965 stats
->rx_frame_errors
+
1966 mac_stats
->rx_symbol_error
);
1967 stats
->tx_errors
= (stats
->tx_window_errors
+
1970 spin_unlock_bh(&efx
->stats_lock
);
1975 /* Context: netif_tx_lock held, BHs disabled. */
1976 static void efx_watchdog(struct net_device
*net_dev
)
1978 struct efx_nic
*efx
= netdev_priv(net_dev
);
1980 netif_err(efx
, tx_err
, efx
->net_dev
,
1981 "TX stuck with port_enabled=%d: resetting channels\n",
1984 efx_schedule_reset(efx
, RESET_TYPE_TX_WATCHDOG
);
1988 /* Context: process, rtnl_lock() held. */
1989 static int efx_change_mtu(struct net_device
*net_dev
, int new_mtu
)
1991 struct efx_nic
*efx
= netdev_priv(net_dev
);
1994 rc
= efx_check_disabled(efx
);
1997 if (new_mtu
> EFX_MAX_MTU
)
2000 netif_dbg(efx
, drv
, efx
->net_dev
, "changing MTU to %d\n", new_mtu
);
2002 efx_device_detach_sync(efx
);
2005 mutex_lock(&efx
->mac_lock
);
2006 net_dev
->mtu
= new_mtu
;
2007 efx
->type
->reconfigure_mac(efx
);
2008 mutex_unlock(&efx
->mac_lock
);
2011 netif_device_attach(efx
->net_dev
);
2015 static int efx_set_mac_address(struct net_device
*net_dev
, void *data
)
2017 struct efx_nic
*efx
= netdev_priv(net_dev
);
2018 struct sockaddr
*addr
= data
;
2019 char *new_addr
= addr
->sa_data
;
2021 if (!is_valid_ether_addr(new_addr
)) {
2022 netif_err(efx
, drv
, efx
->net_dev
,
2023 "invalid ethernet MAC address requested: %pM\n",
2025 return -EADDRNOTAVAIL
;
2028 memcpy(net_dev
->dev_addr
, new_addr
, net_dev
->addr_len
);
2029 efx_sriov_mac_address_changed(efx
);
2031 /* Reconfigure the MAC */
2032 mutex_lock(&efx
->mac_lock
);
2033 efx
->type
->reconfigure_mac(efx
);
2034 mutex_unlock(&efx
->mac_lock
);
2039 /* Context: netif_addr_lock held, BHs disabled. */
2040 static void efx_set_rx_mode(struct net_device
*net_dev
)
2042 struct efx_nic
*efx
= netdev_priv(net_dev
);
2043 struct netdev_hw_addr
*ha
;
2044 union efx_multicast_hash
*mc_hash
= &efx
->multicast_hash
;
2048 efx
->promiscuous
= !!(net_dev
->flags
& IFF_PROMISC
);
2050 /* Build multicast hash table */
2051 if (efx
->promiscuous
|| (net_dev
->flags
& IFF_ALLMULTI
)) {
2052 memset(mc_hash
, 0xff, sizeof(*mc_hash
));
2054 memset(mc_hash
, 0x00, sizeof(*mc_hash
));
2055 netdev_for_each_mc_addr(ha
, net_dev
) {
2056 crc
= ether_crc_le(ETH_ALEN
, ha
->addr
);
2057 bit
= crc
& (EFX_MCAST_HASH_ENTRIES
- 1);
2058 __set_bit_le(bit
, mc_hash
);
2061 /* Broadcast packets go through the multicast hash filter.
2062 * ether_crc_le() of the broadcast address is 0xbe2612ff
2063 * so we always add bit 0xff to the mask.
2065 __set_bit_le(0xff, mc_hash
);
2068 if (efx
->port_enabled
)
2069 queue_work(efx
->workqueue
, &efx
->mac_work
);
2070 /* Otherwise efx_start_port() will do this */
2073 static int efx_set_features(struct net_device
*net_dev
, netdev_features_t data
)
2075 struct efx_nic
*efx
= netdev_priv(net_dev
);
2077 /* If disabling RX n-tuple filtering, clear existing filters */
2078 if (net_dev
->features
& ~data
& NETIF_F_NTUPLE
)
2079 efx_filter_clear_rx(efx
, EFX_FILTER_PRI_MANUAL
);
2084 static const struct net_device_ops efx_netdev_ops
= {
2085 .ndo_open
= efx_net_open
,
2086 .ndo_stop
= efx_net_stop
,
2087 .ndo_get_stats64
= efx_net_stats
,
2088 .ndo_tx_timeout
= efx_watchdog
,
2089 .ndo_start_xmit
= efx_hard_start_xmit
,
2090 .ndo_validate_addr
= eth_validate_addr
,
2091 .ndo_do_ioctl
= efx_ioctl
,
2092 .ndo_change_mtu
= efx_change_mtu
,
2093 .ndo_set_mac_address
= efx_set_mac_address
,
2094 .ndo_set_rx_mode
= efx_set_rx_mode
,
2095 .ndo_set_features
= efx_set_features
,
2096 #ifdef CONFIG_SFC_SRIOV
2097 .ndo_set_vf_mac
= efx_sriov_set_vf_mac
,
2098 .ndo_set_vf_vlan
= efx_sriov_set_vf_vlan
,
2099 .ndo_set_vf_spoofchk
= efx_sriov_set_vf_spoofchk
,
2100 .ndo_get_vf_config
= efx_sriov_get_vf_config
,
2102 #ifdef CONFIG_NET_POLL_CONTROLLER
2103 .ndo_poll_controller
= efx_netpoll
,
2105 .ndo_setup_tc
= efx_setup_tc
,
2106 #ifdef CONFIG_RFS_ACCEL
2107 .ndo_rx_flow_steer
= efx_filter_rfs
,
2111 static void efx_update_name(struct efx_nic
*efx
)
2113 strcpy(efx
->name
, efx
->net_dev
->name
);
2114 efx_mtd_rename(efx
);
2115 efx_set_channel_names(efx
);
2118 static int efx_netdev_event(struct notifier_block
*this,
2119 unsigned long event
, void *ptr
)
2121 struct net_device
*net_dev
= ptr
;
2123 if (net_dev
->netdev_ops
== &efx_netdev_ops
&&
2124 event
== NETDEV_CHANGENAME
)
2125 efx_update_name(netdev_priv(net_dev
));
2130 static struct notifier_block efx_netdev_notifier
= {
2131 .notifier_call
= efx_netdev_event
,
2135 show_phy_type(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
2137 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
2138 return sprintf(buf
, "%d\n", efx
->phy_type
);
2140 static DEVICE_ATTR(phy_type
, 0644, show_phy_type
, NULL
);
2142 static int efx_register_netdev(struct efx_nic
*efx
)
2144 struct net_device
*net_dev
= efx
->net_dev
;
2145 struct efx_channel
*channel
;
2148 net_dev
->watchdog_timeo
= 5 * HZ
;
2149 net_dev
->irq
= efx
->pci_dev
->irq
;
2150 net_dev
->netdev_ops
= &efx_netdev_ops
;
2151 SET_ETHTOOL_OPS(net_dev
, &efx_ethtool_ops
);
2152 net_dev
->gso_max_segs
= EFX_TSO_MAX_SEGS
;
2156 /* Enable resets to be scheduled and check whether any were
2157 * already requested. If so, the NIC is probably hosed so we
2160 efx
->state
= STATE_READY
;
2161 smp_mb(); /* ensure we change state before checking reset_pending */
2162 if (efx
->reset_pending
) {
2163 netif_err(efx
, probe
, efx
->net_dev
,
2164 "aborting probe due to scheduled reset\n");
2169 rc
= dev_alloc_name(net_dev
, net_dev
->name
);
2172 efx_update_name(efx
);
2174 /* Always start with carrier off; PHY events will detect the link */
2175 netif_carrier_off(net_dev
);
2177 rc
= register_netdevice(net_dev
);
2181 efx_for_each_channel(channel
, efx
) {
2182 struct efx_tx_queue
*tx_queue
;
2183 efx_for_each_channel_tx_queue(tx_queue
, channel
)
2184 efx_init_tx_queue_core_txq(tx_queue
);
2189 rc
= device_create_file(&efx
->pci_dev
->dev
, &dev_attr_phy_type
);
2191 netif_err(efx
, drv
, efx
->net_dev
,
2192 "failed to init net dev attributes\n");
2193 goto fail_registered
;
2200 unregister_netdevice(net_dev
);
2202 efx
->state
= STATE_UNINIT
;
2204 netif_err(efx
, drv
, efx
->net_dev
, "could not register net dev\n");
2208 static void efx_unregister_netdev(struct efx_nic
*efx
)
2210 struct efx_channel
*channel
;
2211 struct efx_tx_queue
*tx_queue
;
2216 BUG_ON(netdev_priv(efx
->net_dev
) != efx
);
2218 /* Free up any skbs still remaining. This has to happen before
2219 * we try to unregister the netdev as running their destructors
2220 * may be needed to get the device ref. count to 0. */
2221 efx_for_each_channel(channel
, efx
) {
2222 efx_for_each_channel_tx_queue(tx_queue
, channel
)
2223 efx_release_tx_buffers(tx_queue
);
2226 strlcpy(efx
->name
, pci_name(efx
->pci_dev
), sizeof(efx
->name
));
2227 device_remove_file(&efx
->pci_dev
->dev
, &dev_attr_phy_type
);
2230 unregister_netdevice(efx
->net_dev
);
2231 efx
->state
= STATE_UNINIT
;
2235 /**************************************************************************
2237 * Device reset and suspend
2239 **************************************************************************/
2241 /* Tears down the entire software state and most of the hardware state
2243 void efx_reset_down(struct efx_nic
*efx
, enum reset_type method
)
2245 EFX_ASSERT_RESET_SERIALISED(efx
);
2248 efx_stop_interrupts(efx
, false);
2250 mutex_lock(&efx
->mac_lock
);
2251 if (efx
->port_initialized
&& method
!= RESET_TYPE_INVISIBLE
)
2252 efx
->phy_op
->fini(efx
);
2253 efx
->type
->fini(efx
);
2256 /* This function will always ensure that the locks acquired in
2257 * efx_reset_down() are released. A failure return code indicates
2258 * that we were unable to reinitialise the hardware, and the
2259 * driver should be disabled. If ok is false, then the rx and tx
2260 * engines are not restarted, pending a RESET_DISABLE. */
2261 int efx_reset_up(struct efx_nic
*efx
, enum reset_type method
, bool ok
)
2265 EFX_ASSERT_RESET_SERIALISED(efx
);
2267 rc
= efx
->type
->init(efx
);
2269 netif_err(efx
, drv
, efx
->net_dev
, "failed to initialise NIC\n");
2276 if (efx
->port_initialized
&& method
!= RESET_TYPE_INVISIBLE
) {
2277 rc
= efx
->phy_op
->init(efx
);
2280 if (efx
->phy_op
->reconfigure(efx
))
2281 netif_err(efx
, drv
, efx
->net_dev
,
2282 "could not restore PHY settings\n");
2285 efx
->type
->reconfigure_mac(efx
);
2287 efx_start_interrupts(efx
, false);
2288 efx_restore_filters(efx
);
2289 efx_sriov_reset(efx
);
2291 mutex_unlock(&efx
->mac_lock
);
2298 efx
->port_initialized
= false;
2300 mutex_unlock(&efx
->mac_lock
);
2305 /* Reset the NIC using the specified method. Note that the reset may
2306 * fail, in which case the card will be left in an unusable state.
2308 * Caller must hold the rtnl_lock.
2310 int efx_reset(struct efx_nic
*efx
, enum reset_type method
)
2315 netif_info(efx
, drv
, efx
->net_dev
, "resetting (%s)\n",
2316 RESET_TYPE(method
));
2318 efx_device_detach_sync(efx
);
2319 efx_reset_down(efx
, method
);
2321 rc
= efx
->type
->reset(efx
, method
);
2323 netif_err(efx
, drv
, efx
->net_dev
, "failed to reset hardware\n");
2327 /* Clear flags for the scopes we covered. We assume the NIC and
2328 * driver are now quiescent so that there is no race here.
2330 efx
->reset_pending
&= -(1 << (method
+ 1));
2332 /* Reinitialise bus-mastering, which may have been turned off before
2333 * the reset was scheduled. This is still appropriate, even in the
2334 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
2335 * can respond to requests. */
2336 pci_set_master(efx
->pci_dev
);
2339 /* Leave device stopped if necessary */
2341 method
== RESET_TYPE_DISABLE
||
2342 method
== RESET_TYPE_RECOVER_OR_DISABLE
;
2343 rc2
= efx_reset_up(efx
, method
, !disabled
);
2351 dev_close(efx
->net_dev
);
2352 netif_err(efx
, drv
, efx
->net_dev
, "has been disabled\n");
2353 efx
->state
= STATE_DISABLED
;
2355 netif_dbg(efx
, drv
, efx
->net_dev
, "reset complete\n");
2356 netif_device_attach(efx
->net_dev
);
2361 /* Try recovery mechanisms.
2362 * For now only EEH is supported.
2363 * Returns 0 if the recovery mechanisms are unsuccessful.
2364 * Returns a non-zero value otherwise.
2366 static int efx_try_recovery(struct efx_nic
*efx
)
2369 /* A PCI error can occur and not be seen by EEH because nothing
2370 * happens on the PCI bus. In this case the driver may fail and
2371 * schedule a 'recover or reset', leading to this recovery handler.
2372 * Manually call the eeh failure check function.
2374 struct eeh_dev
*eehdev
=
2375 of_node_to_eeh_dev(pci_device_to_OF_node(efx
->pci_dev
));
2377 if (eeh_dev_check_failure(eehdev
)) {
2378 /* The EEH mechanisms will handle the error and reset the
2379 * device if necessary.
2387 /* The worker thread exists so that code that cannot sleep can
2388 * schedule a reset for later.
2390 static void efx_reset_work(struct work_struct
*data
)
2392 struct efx_nic
*efx
= container_of(data
, struct efx_nic
, reset_work
);
2393 unsigned long pending
;
2394 enum reset_type method
;
2396 pending
= ACCESS_ONCE(efx
->reset_pending
);
2397 method
= fls(pending
) - 1;
2399 if ((method
== RESET_TYPE_RECOVER_OR_DISABLE
||
2400 method
== RESET_TYPE_RECOVER_OR_ALL
) &&
2401 efx_try_recovery(efx
))
2409 /* We checked the state in efx_schedule_reset() but it may
2410 * have changed by now. Now that we have the RTNL lock,
2411 * it cannot change again.
2413 if (efx
->state
== STATE_READY
)
2414 (void)efx_reset(efx
, method
);
2419 void efx_schedule_reset(struct efx_nic
*efx
, enum reset_type type
)
2421 enum reset_type method
;
2423 if (efx
->state
== STATE_RECOVERY
) {
2424 netif_dbg(efx
, drv
, efx
->net_dev
,
2425 "recovering: skip scheduling %s reset\n",
2431 case RESET_TYPE_INVISIBLE
:
2432 case RESET_TYPE_ALL
:
2433 case RESET_TYPE_RECOVER_OR_ALL
:
2434 case RESET_TYPE_WORLD
:
2435 case RESET_TYPE_DISABLE
:
2436 case RESET_TYPE_RECOVER_OR_DISABLE
:
2438 netif_dbg(efx
, drv
, efx
->net_dev
, "scheduling %s reset\n",
2439 RESET_TYPE(method
));
2442 method
= efx
->type
->map_reset_reason(type
);
2443 netif_dbg(efx
, drv
, efx
->net_dev
,
2444 "scheduling %s reset for %s\n",
2445 RESET_TYPE(method
), RESET_TYPE(type
));
2449 set_bit(method
, &efx
->reset_pending
);
2450 smp_mb(); /* ensure we change reset_pending before checking state */
2452 /* If we're not READY then just leave the flags set as the cue
2453 * to abort probing or reschedule the reset later.
2455 if (ACCESS_ONCE(efx
->state
) != STATE_READY
)
2458 /* efx_process_channel() will no longer read events once a
2459 * reset is scheduled. So switch back to poll'd MCDI completions. */
2460 efx_mcdi_mode_poll(efx
);
2462 queue_work(reset_workqueue
, &efx
->reset_work
);
2465 /**************************************************************************
2467 * List of NICs we support
2469 **************************************************************************/
2471 /* PCI device ID table */
2472 static DEFINE_PCI_DEVICE_TABLE(efx_pci_table
) = {
2473 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
,
2474 PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0
),
2475 .driver_data
= (unsigned long) &falcon_a1_nic_type
},
2476 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
,
2477 PCI_DEVICE_ID_SOLARFLARE_SFC4000B
),
2478 .driver_data
= (unsigned long) &falcon_b0_nic_type
},
2479 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0803), /* SFC9020 */
2480 .driver_data
= (unsigned long) &siena_a0_nic_type
},
2481 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0813), /* SFL9021 */
2482 .driver_data
= (unsigned long) &siena_a0_nic_type
},
2483 {0} /* end of list */
2486 /**************************************************************************
2488 * Dummy PHY/MAC operations
2490 * Can be used for some unimplemented operations
2491 * Needed so all function pointers are valid and do not have to be tested
2494 **************************************************************************/
2495 int efx_port_dummy_op_int(struct efx_nic
*efx
)
2499 void efx_port_dummy_op_void(struct efx_nic
*efx
) {}
2501 static bool efx_port_dummy_op_poll(struct efx_nic
*efx
)
2506 static const struct efx_phy_operations efx_dummy_phy_operations
= {
2507 .init
= efx_port_dummy_op_int
,
2508 .reconfigure
= efx_port_dummy_op_int
,
2509 .poll
= efx_port_dummy_op_poll
,
2510 .fini
= efx_port_dummy_op_void
,
2513 /**************************************************************************
2517 **************************************************************************/
2519 /* This zeroes out and then fills in the invariants in a struct
2520 * efx_nic (including all sub-structures).
2522 static int efx_init_struct(struct efx_nic
*efx
,
2523 struct pci_dev
*pci_dev
, struct net_device
*net_dev
)
2527 /* Initialise common structures */
2528 spin_lock_init(&efx
->biu_lock
);
2529 #ifdef CONFIG_SFC_MTD
2530 INIT_LIST_HEAD(&efx
->mtd_list
);
2532 INIT_WORK(&efx
->reset_work
, efx_reset_work
);
2533 INIT_DELAYED_WORK(&efx
->monitor_work
, efx_monitor
);
2534 INIT_DELAYED_WORK(&efx
->selftest_work
, efx_selftest_async_work
);
2535 efx
->pci_dev
= pci_dev
;
2536 efx
->msg_enable
= debug
;
2537 efx
->state
= STATE_UNINIT
;
2538 strlcpy(efx
->name
, pci_name(pci_dev
), sizeof(efx
->name
));
2540 efx
->net_dev
= net_dev
;
2541 spin_lock_init(&efx
->stats_lock
);
2542 mutex_init(&efx
->mac_lock
);
2543 efx
->phy_op
= &efx_dummy_phy_operations
;
2544 efx
->mdio
.dev
= net_dev
;
2545 INIT_WORK(&efx
->mac_work
, efx_mac_work
);
2546 init_waitqueue_head(&efx
->flush_wq
);
2548 for (i
= 0; i
< EFX_MAX_CHANNELS
; i
++) {
2549 efx
->channel
[i
] = efx_alloc_channel(efx
, i
, NULL
);
2550 if (!efx
->channel
[i
])
2554 EFX_BUG_ON_PARANOID(efx
->type
->phys_addr_channels
> EFX_MAX_CHANNELS
);
2556 /* Higher numbered interrupt modes are less capable! */
2557 efx
->interrupt_mode
= max(efx
->type
->max_interrupt_mode
,
2560 /* Would be good to use the net_dev name, but we're too early */
2561 snprintf(efx
->workqueue_name
, sizeof(efx
->workqueue_name
), "sfc%s",
2563 efx
->workqueue
= create_singlethread_workqueue(efx
->workqueue_name
);
2564 if (!efx
->workqueue
)
2570 efx_fini_struct(efx
);
2574 static void efx_fini_struct(struct efx_nic
*efx
)
2578 for (i
= 0; i
< EFX_MAX_CHANNELS
; i
++)
2579 kfree(efx
->channel
[i
]);
2581 if (efx
->workqueue
) {
2582 destroy_workqueue(efx
->workqueue
);
2583 efx
->workqueue
= NULL
;
2587 /**************************************************************************
2591 **************************************************************************/
2593 /* Main body of final NIC shutdown code
2594 * This is called only at module unload (or hotplug removal).
2596 static void efx_pci_remove_main(struct efx_nic
*efx
)
2598 /* Flush reset_work. It can no longer be scheduled since we
2601 BUG_ON(efx
->state
== STATE_READY
);
2602 cancel_work_sync(&efx
->reset_work
);
2604 #ifdef CONFIG_RFS_ACCEL
2605 free_irq_cpu_rmap(efx
->net_dev
->rx_cpu_rmap
);
2606 efx
->net_dev
->rx_cpu_rmap
= NULL
;
2608 efx_stop_interrupts(efx
, false);
2609 efx_nic_fini_interrupt(efx
);
2611 efx
->type
->fini(efx
);
2613 efx_remove_all(efx
);
2616 /* Final NIC shutdown
2617 * This is called only at module unload (or hotplug removal).
2619 static void efx_pci_remove(struct pci_dev
*pci_dev
)
2621 struct efx_nic
*efx
;
2623 efx
= pci_get_drvdata(pci_dev
);
2627 /* Mark the NIC as fini, then stop the interface */
2629 dev_close(efx
->net_dev
);
2630 efx_stop_interrupts(efx
, false);
2633 efx_sriov_fini(efx
);
2634 efx_unregister_netdev(efx
);
2636 efx_mtd_remove(efx
);
2638 efx_pci_remove_main(efx
);
2641 netif_dbg(efx
, drv
, efx
->net_dev
, "shutdown successful\n");
2643 efx_fini_struct(efx
);
2644 pci_set_drvdata(pci_dev
, NULL
);
2645 free_netdev(efx
->net_dev
);
2647 pci_disable_pcie_error_reporting(pci_dev
);
2650 /* NIC VPD information
2651 * Called during probe to display the part number of the
2652 * installed NIC. VPD is potentially very large but this should
2653 * always appear within the first 512 bytes.
2655 #define SFC_VPD_LEN 512
2656 static void efx_print_product_vpd(struct efx_nic
*efx
)
2658 struct pci_dev
*dev
= efx
->pci_dev
;
2659 char vpd_data
[SFC_VPD_LEN
];
2663 /* Get the vpd data from the device */
2664 vpd_size
= pci_read_vpd(dev
, 0, sizeof(vpd_data
), vpd_data
);
2665 if (vpd_size
<= 0) {
2666 netif_err(efx
, drv
, efx
->net_dev
, "Unable to read VPD\n");
2670 /* Get the Read only section */
2671 i
= pci_vpd_find_tag(vpd_data
, 0, vpd_size
, PCI_VPD_LRDT_RO_DATA
);
2673 netif_err(efx
, drv
, efx
->net_dev
, "VPD Read-only not found\n");
2677 j
= pci_vpd_lrdt_size(&vpd_data
[i
]);
2678 i
+= PCI_VPD_LRDT_TAG_SIZE
;
2679 if (i
+ j
> vpd_size
)
2682 /* Get the Part number */
2683 i
= pci_vpd_find_info_keyword(vpd_data
, i
, j
, "PN");
2685 netif_err(efx
, drv
, efx
->net_dev
, "Part number not found\n");
2689 j
= pci_vpd_info_field_size(&vpd_data
[i
]);
2690 i
+= PCI_VPD_INFO_FLD_HDR_SIZE
;
2691 if (i
+ j
> vpd_size
) {
2692 netif_err(efx
, drv
, efx
->net_dev
, "Incomplete part number\n");
2696 netif_info(efx
, drv
, efx
->net_dev
,
2697 "Part Number : %.*s\n", j
, &vpd_data
[i
]);
2701 /* Main body of NIC initialisation
2702 * This is called at module load (or hotplug insertion, theoretically).
2704 static int efx_pci_probe_main(struct efx_nic
*efx
)
2708 /* Do start-of-day initialisation */
2709 rc
= efx_probe_all(efx
);
2715 rc
= efx
->type
->init(efx
);
2717 netif_err(efx
, probe
, efx
->net_dev
,
2718 "failed to initialise NIC\n");
2722 rc
= efx_init_port(efx
);
2724 netif_err(efx
, probe
, efx
->net_dev
,
2725 "failed to initialise port\n");
2729 rc
= efx_nic_init_interrupt(efx
);
2732 efx_start_interrupts(efx
, false);
2739 efx
->type
->fini(efx
);
2742 efx_remove_all(efx
);
2747 /* NIC initialisation
2749 * This is called at module load (or hotplug insertion,
2750 * theoretically). It sets up PCI mappings, resets the NIC,
2751 * sets up and registers the network devices with the kernel and hooks
2752 * the interrupt service routine. It does not prepare the device for
2753 * transmission; this is left to the first time one of the network
2754 * interfaces is brought up (i.e. efx_net_open).
2756 static int efx_pci_probe(struct pci_dev
*pci_dev
,
2757 const struct pci_device_id
*entry
)
2759 struct net_device
*net_dev
;
2760 struct efx_nic
*efx
;
2763 /* Allocate and initialise a struct net_device and struct efx_nic */
2764 net_dev
= alloc_etherdev_mqs(sizeof(*efx
), EFX_MAX_CORE_TX_QUEUES
,
2768 efx
= netdev_priv(net_dev
);
2769 efx
->type
= (const struct efx_nic_type
*) entry
->driver_data
;
2770 net_dev
->features
|= (efx
->type
->offload_features
| NETIF_F_SG
|
2771 NETIF_F_HIGHDMA
| NETIF_F_TSO
|
2773 if (efx
->type
->offload_features
& NETIF_F_V6_CSUM
)
2774 net_dev
->features
|= NETIF_F_TSO6
;
2775 /* Mask for features that also apply to VLAN devices */
2776 net_dev
->vlan_features
|= (NETIF_F_ALL_CSUM
| NETIF_F_SG
|
2777 NETIF_F_HIGHDMA
| NETIF_F_ALL_TSO
|
2779 /* All offloads can be toggled */
2780 net_dev
->hw_features
= net_dev
->features
& ~NETIF_F_HIGHDMA
;
2781 pci_set_drvdata(pci_dev
, efx
);
2782 SET_NETDEV_DEV(net_dev
, &pci_dev
->dev
);
2783 rc
= efx_init_struct(efx
, pci_dev
, net_dev
);
2787 netif_info(efx
, probe
, efx
->net_dev
,
2788 "Solarflare NIC detected\n");
2790 efx_print_product_vpd(efx
);
2792 /* Set up basic I/O (BAR mappings etc) */
2793 rc
= efx_init_io(efx
);
2797 rc
= efx_pci_probe_main(efx
);
2801 rc
= efx_register_netdev(efx
);
2805 rc
= efx_sriov_init(efx
);
2807 netif_err(efx
, probe
, efx
->net_dev
,
2808 "SR-IOV can't be enabled rc %d\n", rc
);
2810 netif_dbg(efx
, probe
, efx
->net_dev
, "initialisation successful\n");
2812 /* Try to create MTDs, but allow this to fail */
2814 rc
= efx_mtd_probe(efx
);
2817 netif_warn(efx
, probe
, efx
->net_dev
,
2818 "failed to create MTDs (%d)\n", rc
);
2820 rc
= pci_enable_pcie_error_reporting(pci_dev
);
2821 if (rc
&& rc
!= -EINVAL
)
2822 netif_warn(efx
, probe
, efx
->net_dev
,
2823 "pci_enable_pcie_error_reporting failed (%d)\n", rc
);
2828 efx_pci_remove_main(efx
);
2832 efx_fini_struct(efx
);
2834 pci_set_drvdata(pci_dev
, NULL
);
2836 netif_dbg(efx
, drv
, efx
->net_dev
, "initialisation failed. rc=%d\n", rc
);
2837 free_netdev(net_dev
);
2841 static int efx_pm_freeze(struct device
*dev
)
2843 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
2847 if (efx
->state
!= STATE_DISABLED
) {
2848 efx
->state
= STATE_UNINIT
;
2850 efx_device_detach_sync(efx
);
2853 efx_stop_interrupts(efx
, false);
2861 static int efx_pm_thaw(struct device
*dev
)
2863 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
2867 if (efx
->state
!= STATE_DISABLED
) {
2868 efx_start_interrupts(efx
, false);
2870 mutex_lock(&efx
->mac_lock
);
2871 efx
->phy_op
->reconfigure(efx
);
2872 mutex_unlock(&efx
->mac_lock
);
2876 netif_device_attach(efx
->net_dev
);
2878 efx
->state
= STATE_READY
;
2880 efx
->type
->resume_wol(efx
);
2885 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
2886 queue_work(reset_workqueue
, &efx
->reset_work
);
2891 static int efx_pm_poweroff(struct device
*dev
)
2893 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
2894 struct efx_nic
*efx
= pci_get_drvdata(pci_dev
);
2896 efx
->type
->fini(efx
);
2898 efx
->reset_pending
= 0;
2900 pci_save_state(pci_dev
);
2901 return pci_set_power_state(pci_dev
, PCI_D3hot
);
2904 /* Used for both resume and restore */
2905 static int efx_pm_resume(struct device
*dev
)
2907 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
2908 struct efx_nic
*efx
= pci_get_drvdata(pci_dev
);
2911 rc
= pci_set_power_state(pci_dev
, PCI_D0
);
2914 pci_restore_state(pci_dev
);
2915 rc
= pci_enable_device(pci_dev
);
2918 pci_set_master(efx
->pci_dev
);
2919 rc
= efx
->type
->reset(efx
, RESET_TYPE_ALL
);
2922 rc
= efx
->type
->init(efx
);
2929 static int efx_pm_suspend(struct device
*dev
)
2934 rc
= efx_pm_poweroff(dev
);
2940 static const struct dev_pm_ops efx_pm_ops
= {
2941 .suspend
= efx_pm_suspend
,
2942 .resume
= efx_pm_resume
,
2943 .freeze
= efx_pm_freeze
,
2944 .thaw
= efx_pm_thaw
,
2945 .poweroff
= efx_pm_poweroff
,
2946 .restore
= efx_pm_resume
,
2949 /* A PCI error affecting this device was detected.
2950 * At this point MMIO and DMA may be disabled.
2951 * Stop the software path and request a slot reset.
2953 static pci_ers_result_t
efx_io_error_detected(struct pci_dev
*pdev
,
2954 enum pci_channel_state state
)
2956 pci_ers_result_t status
= PCI_ERS_RESULT_RECOVERED
;
2957 struct efx_nic
*efx
= pci_get_drvdata(pdev
);
2959 if (state
== pci_channel_io_perm_failure
)
2960 return PCI_ERS_RESULT_DISCONNECT
;
2964 if (efx
->state
!= STATE_DISABLED
) {
2965 efx
->state
= STATE_RECOVERY
;
2966 efx
->reset_pending
= 0;
2968 efx_device_detach_sync(efx
);
2971 efx_stop_interrupts(efx
, false);
2973 status
= PCI_ERS_RESULT_NEED_RESET
;
2975 /* If the interface is disabled we don't want to do anything
2978 status
= PCI_ERS_RESULT_RECOVERED
;
2983 pci_disable_device(pdev
);
2988 /* Fake a successfull reset, which will be performed later in efx_io_resume. */
2989 static pci_ers_result_t
efx_io_slot_reset(struct pci_dev
*pdev
)
2991 struct efx_nic
*efx
= pci_get_drvdata(pdev
);
2992 pci_ers_result_t status
= PCI_ERS_RESULT_RECOVERED
;
2995 if (pci_enable_device(pdev
)) {
2996 netif_err(efx
, hw
, efx
->net_dev
,
2997 "Cannot re-enable PCI device after reset.\n");
2998 status
= PCI_ERS_RESULT_DISCONNECT
;
3001 rc
= pci_cleanup_aer_uncorrect_error_status(pdev
);
3003 netif_err(efx
, hw
, efx
->net_dev
,
3004 "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc
);
3005 /* Non-fatal error. Continue. */
3011 /* Perform the actual reset and resume I/O operations. */
3012 static void efx_io_resume(struct pci_dev
*pdev
)
3014 struct efx_nic
*efx
= pci_get_drvdata(pdev
);
3019 if (efx
->state
== STATE_DISABLED
)
3022 rc
= efx_reset(efx
, RESET_TYPE_ALL
);
3024 netif_err(efx
, hw
, efx
->net_dev
,
3025 "efx_reset failed after PCI error (%d)\n", rc
);
3027 efx
->state
= STATE_READY
;
3028 netif_dbg(efx
, hw
, efx
->net_dev
,
3029 "Done resetting and resuming IO after PCI error.\n");
3036 /* For simplicity and reliability, we always require a slot reset and try to
3037 * reset the hardware when a pci error affecting the device is detected.
3038 * We leave both the link_reset and mmio_enabled callback unimplemented:
3039 * with our request for slot reset the mmio_enabled callback will never be
3040 * called, and the link_reset callback is not used by AER or EEH mechanisms.
3042 static struct pci_error_handlers efx_err_handlers
= {
3043 .error_detected
= efx_io_error_detected
,
3044 .slot_reset
= efx_io_slot_reset
,
3045 .resume
= efx_io_resume
,
3048 static struct pci_driver efx_pci_driver
= {
3049 .name
= KBUILD_MODNAME
,
3050 .id_table
= efx_pci_table
,
3051 .probe
= efx_pci_probe
,
3052 .remove
= efx_pci_remove
,
3053 .driver
.pm
= &efx_pm_ops
,
3054 .err_handler
= &efx_err_handlers
,
3057 /**************************************************************************
3059 * Kernel module interface
3061 *************************************************************************/
3063 module_param(interrupt_mode
, uint
, 0444);
3064 MODULE_PARM_DESC(interrupt_mode
,
3065 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
3067 static int __init
efx_init_module(void)
3071 printk(KERN_INFO
"Solarflare NET driver v" EFX_DRIVER_VERSION
"\n");
3073 rc
= register_netdevice_notifier(&efx_netdev_notifier
);
3077 rc
= efx_init_sriov();
3081 reset_workqueue
= create_singlethread_workqueue("sfc_reset");
3082 if (!reset_workqueue
) {
3087 rc
= pci_register_driver(&efx_pci_driver
);
3094 destroy_workqueue(reset_workqueue
);
3098 unregister_netdevice_notifier(&efx_netdev_notifier
);
3103 static void __exit
efx_exit_module(void)
3105 printk(KERN_INFO
"Solarflare NET driver unloading\n");
3107 pci_unregister_driver(&efx_pci_driver
);
3108 destroy_workqueue(reset_workqueue
);
3110 unregister_netdevice_notifier(&efx_netdev_notifier
);
3114 module_init(efx_init_module
);
3115 module_exit(efx_exit_module
);
3117 MODULE_AUTHOR("Solarflare Communications and "
3118 "Michael Brown <mbrown@fensystems.co.uk>");
3119 MODULE_DESCRIPTION("Solarflare Communications network driver");
3120 MODULE_LICENSE("GPL");
3121 MODULE_DEVICE_TABLE(pci
, efx_pci_table
);