1 /****************************************************************************
2 * Driver for Solarflare network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2005-2013 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/ethtool.h>
21 #include <linux/topology.h>
22 #include <linux/gfp.h>
23 #include <linux/aer.h>
24 #include <linux/interrupt.h>
25 #include "net_driver.h"
31 #include "workarounds.h"
33 /**************************************************************************
37 **************************************************************************
40 /* Loopback mode names (see LOOPBACK_MODE()) */
41 const unsigned int efx_loopback_mode_max
= LOOPBACK_MAX
;
42 const char *const efx_loopback_mode_names
[] = {
43 [LOOPBACK_NONE
] = "NONE",
44 [LOOPBACK_DATA
] = "DATAPATH",
45 [LOOPBACK_GMAC
] = "GMAC",
46 [LOOPBACK_XGMII
] = "XGMII",
47 [LOOPBACK_XGXS
] = "XGXS",
48 [LOOPBACK_XAUI
] = "XAUI",
49 [LOOPBACK_GMII
] = "GMII",
50 [LOOPBACK_SGMII
] = "SGMII",
51 [LOOPBACK_XGBR
] = "XGBR",
52 [LOOPBACK_XFI
] = "XFI",
53 [LOOPBACK_XAUI_FAR
] = "XAUI_FAR",
54 [LOOPBACK_GMII_FAR
] = "GMII_FAR",
55 [LOOPBACK_SGMII_FAR
] = "SGMII_FAR",
56 [LOOPBACK_XFI_FAR
] = "XFI_FAR",
57 [LOOPBACK_GPHY
] = "GPHY",
58 [LOOPBACK_PHYXS
] = "PHYXS",
59 [LOOPBACK_PCS
] = "PCS",
60 [LOOPBACK_PMAPMD
] = "PMA/PMD",
61 [LOOPBACK_XPORT
] = "XPORT",
62 [LOOPBACK_XGMII_WS
] = "XGMII_WS",
63 [LOOPBACK_XAUI_WS
] = "XAUI_WS",
64 [LOOPBACK_XAUI_WS_FAR
] = "XAUI_WS_FAR",
65 [LOOPBACK_XAUI_WS_NEAR
] = "XAUI_WS_NEAR",
66 [LOOPBACK_GMII_WS
] = "GMII_WS",
67 [LOOPBACK_XFI_WS
] = "XFI_WS",
68 [LOOPBACK_XFI_WS_FAR
] = "XFI_WS_FAR",
69 [LOOPBACK_PHYXS_WS
] = "PHYXS_WS",
72 const unsigned int efx_reset_type_max
= RESET_TYPE_MAX
;
73 const char *const efx_reset_type_names
[] = {
74 [RESET_TYPE_INVISIBLE
] = "INVISIBLE",
75 [RESET_TYPE_ALL
] = "ALL",
76 [RESET_TYPE_RECOVER_OR_ALL
] = "RECOVER_OR_ALL",
77 [RESET_TYPE_WORLD
] = "WORLD",
78 [RESET_TYPE_RECOVER_OR_DISABLE
] = "RECOVER_OR_DISABLE",
79 [RESET_TYPE_DISABLE
] = "DISABLE",
80 [RESET_TYPE_TX_WATCHDOG
] = "TX_WATCHDOG",
81 [RESET_TYPE_INT_ERROR
] = "INT_ERROR",
82 [RESET_TYPE_RX_RECOVERY
] = "RX_RECOVERY",
83 [RESET_TYPE_DMA_ERROR
] = "DMA_ERROR",
84 [RESET_TYPE_TX_SKIP
] = "TX_SKIP",
85 [RESET_TYPE_MC_FAILURE
] = "MC_FAILURE",
86 [RESET_TYPE_MC_BIST
] = "MC_BIST",
89 /* Reset workqueue. If any NIC has a hardware failure then a reset will be
90 * queued onto this work queue. This is not a per-nic work queue, because
91 * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised.
93 static struct workqueue_struct
*reset_workqueue
;
95 /* How often and how many times to poll for a reset while waiting for a
96 * BIST that another function started to complete.
98 #define BIST_WAIT_DELAY_MS 100
99 #define BIST_WAIT_DELAY_COUNT 100
101 /**************************************************************************
103 * Configurable values
105 *************************************************************************/
108 * Use separate channels for TX and RX events
110 * Set this to 1 to use separate channels for TX and RX. It allows us
111 * to control interrupt affinity separately for TX and RX.
113 * This is only used in MSI-X interrupt mode
115 static bool separate_tx_channels
;
116 module_param(separate_tx_channels
, bool, 0444);
117 MODULE_PARM_DESC(separate_tx_channels
,
118 "Use separate channels for TX and RX");
120 /* This is the weight assigned to each of the (per-channel) virtual
123 static int napi_weight
= 64;
125 /* This is the time (in jiffies) between invocations of the hardware
127 * On Falcon-based NICs, this will:
128 * - Check the on-board hardware monitor;
129 * - Poll the link state and reconfigure the hardware as necessary.
130 * On Siena-based NICs for power systems with EEH support, this will give EEH a
133 static unsigned int efx_monitor_interval
= 1 * HZ
;
135 /* Initial interrupt moderation settings. They can be modified after
136 * module load with ethtool.
138 * The default for RX should strike a balance between increasing the
139 * round-trip latency and reducing overhead.
141 static unsigned int rx_irq_mod_usec
= 60;
143 /* Initial interrupt moderation settings. They can be modified after
144 * module load with ethtool.
146 * This default is chosen to ensure that a 10G link does not go idle
147 * while a TX queue is stopped after it has become full. A queue is
148 * restarted when it drops below half full. The time this takes (assuming
149 * worst case 3 descriptors per packet and 1024 descriptors) is
150 * 512 / 3 * 1.2 = 205 usec.
152 static unsigned int tx_irq_mod_usec
= 150;
154 /* This is the first interrupt mode to try out of:
159 static unsigned int interrupt_mode
;
161 /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS),
162 * i.e. the number of CPUs among which we may distribute simultaneous
163 * interrupt handling.
165 * Cards without MSI-X will only target one CPU via legacy or MSI interrupt.
166 * The default (0) means to assign an interrupt to each core.
168 static unsigned int rss_cpus
;
169 module_param(rss_cpus
, uint
, 0444);
170 MODULE_PARM_DESC(rss_cpus
, "Number of CPUs to use for Receive-Side Scaling");
172 static bool phy_flash_cfg
;
173 module_param(phy_flash_cfg
, bool, 0644);
174 MODULE_PARM_DESC(phy_flash_cfg
, "Set PHYs into reflash mode initially");
176 static unsigned irq_adapt_low_thresh
= 8000;
177 module_param(irq_adapt_low_thresh
, uint
, 0644);
178 MODULE_PARM_DESC(irq_adapt_low_thresh
,
179 "Threshold score for reducing IRQ moderation");
181 static unsigned irq_adapt_high_thresh
= 16000;
182 module_param(irq_adapt_high_thresh
, uint
, 0644);
183 MODULE_PARM_DESC(irq_adapt_high_thresh
,
184 "Threshold score for increasing IRQ moderation");
186 static unsigned debug
= (NETIF_MSG_DRV
| NETIF_MSG_PROBE
|
187 NETIF_MSG_LINK
| NETIF_MSG_IFDOWN
|
188 NETIF_MSG_IFUP
| NETIF_MSG_RX_ERR
|
189 NETIF_MSG_TX_ERR
| NETIF_MSG_HW
);
190 module_param(debug
, uint
, 0);
191 MODULE_PARM_DESC(debug
, "Bitmapped debugging message enable value");
193 /**************************************************************************
195 * Utility functions and prototypes
197 *************************************************************************/
199 static int efx_soft_enable_interrupts(struct efx_nic
*efx
);
200 static void efx_soft_disable_interrupts(struct efx_nic
*efx
);
201 static void efx_remove_channel(struct efx_channel
*channel
);
202 static void efx_remove_channels(struct efx_nic
*efx
);
203 static const struct efx_channel_type efx_default_channel_type
;
204 static void efx_remove_port(struct efx_nic
*efx
);
205 static void efx_init_napi_channel(struct efx_channel
*channel
);
206 static void efx_fini_napi(struct efx_nic
*efx
);
207 static void efx_fini_napi_channel(struct efx_channel
*channel
);
208 static void efx_fini_struct(struct efx_nic
*efx
);
209 static void efx_start_all(struct efx_nic
*efx
);
210 static void efx_stop_all(struct efx_nic
*efx
);
212 #define EFX_ASSERT_RESET_SERIALISED(efx) \
214 if ((efx->state == STATE_READY) || \
215 (efx->state == STATE_RECOVERY) || \
216 (efx->state == STATE_DISABLED)) \
220 static int efx_check_disabled(struct efx_nic
*efx
)
222 if (efx
->state
== STATE_DISABLED
|| efx
->state
== STATE_RECOVERY
) {
223 netif_err(efx
, drv
, efx
->net_dev
,
224 "device is disabled due to earlier errors\n");
230 /**************************************************************************
232 * Event queue processing
234 *************************************************************************/
236 /* Process channel's event queue
238 * This function is responsible for processing the event queue of a
239 * single channel. The caller must guarantee that this function will
240 * never be concurrently called more than once on the same channel,
241 * though different channels may be being processed concurrently.
243 static int efx_process_channel(struct efx_channel
*channel
, int budget
)
247 if (unlikely(!channel
->enabled
))
250 spent
= efx_nic_process_eventq(channel
, budget
);
251 if (spent
&& efx_channel_has_rx_queue(channel
)) {
252 struct efx_rx_queue
*rx_queue
=
253 efx_channel_get_rx_queue(channel
);
255 efx_rx_flush_packet(channel
);
256 efx_fast_push_rx_descriptors(rx_queue
, true);
264 * NAPI guarantees serialisation of polls of the same device, which
265 * provides the guarantee required by efx_process_channel().
267 static int efx_poll(struct napi_struct
*napi
, int budget
)
269 struct efx_channel
*channel
=
270 container_of(napi
, struct efx_channel
, napi_str
);
271 struct efx_nic
*efx
= channel
->efx
;
274 netif_vdbg(efx
, intr
, efx
->net_dev
,
275 "channel %d NAPI poll executing on CPU %d\n",
276 channel
->channel
, raw_smp_processor_id());
278 spent
= efx_process_channel(channel
, budget
);
280 if (spent
< budget
) {
281 if (efx_channel_has_rx_queue(channel
) &&
282 efx
->irq_rx_adaptive
&&
283 unlikely(++channel
->irq_count
== 1000)) {
284 if (unlikely(channel
->irq_mod_score
<
285 irq_adapt_low_thresh
)) {
286 if (channel
->irq_moderation
> 1) {
287 channel
->irq_moderation
-= 1;
288 efx
->type
->push_irq_moderation(channel
);
290 } else if (unlikely(channel
->irq_mod_score
>
291 irq_adapt_high_thresh
)) {
292 if (channel
->irq_moderation
<
293 efx
->irq_rx_moderation
) {
294 channel
->irq_moderation
+= 1;
295 efx
->type
->push_irq_moderation(channel
);
298 channel
->irq_count
= 0;
299 channel
->irq_mod_score
= 0;
302 efx_filter_rfs_expire(channel
);
304 /* There is no race here; although napi_disable() will
305 * only wait for napi_complete(), this isn't a problem
306 * since efx_nic_eventq_read_ack() will have no effect if
307 * interrupts have already been disabled.
310 efx_nic_eventq_read_ack(channel
);
316 /* Create event queue
317 * Event queue memory allocations are done only once. If the channel
318 * is reset, the memory buffer will be reused; this guards against
319 * errors during channel reset and also simplifies interrupt handling.
321 static int efx_probe_eventq(struct efx_channel
*channel
)
323 struct efx_nic
*efx
= channel
->efx
;
324 unsigned long entries
;
326 netif_dbg(efx
, probe
, efx
->net_dev
,
327 "chan %d create event queue\n", channel
->channel
);
329 /* Build an event queue with room for one event per tx and rx buffer,
330 * plus some extra for link state events and MCDI completions. */
331 entries
= roundup_pow_of_two(efx
->rxq_entries
+ efx
->txq_entries
+ 128);
332 EFX_BUG_ON_PARANOID(entries
> EFX_MAX_EVQ_SIZE
);
333 channel
->eventq_mask
= max(entries
, EFX_MIN_EVQ_SIZE
) - 1;
335 return efx_nic_probe_eventq(channel
);
338 /* Prepare channel's event queue */
339 static int efx_init_eventq(struct efx_channel
*channel
)
341 struct efx_nic
*efx
= channel
->efx
;
344 EFX_WARN_ON_PARANOID(channel
->eventq_init
);
346 netif_dbg(efx
, drv
, efx
->net_dev
,
347 "chan %d init event queue\n", channel
->channel
);
349 rc
= efx_nic_init_eventq(channel
);
351 efx
->type
->push_irq_moderation(channel
);
352 channel
->eventq_read_ptr
= 0;
353 channel
->eventq_init
= true;
358 /* Enable event queue processing and NAPI */
359 static void efx_start_eventq(struct efx_channel
*channel
)
361 netif_dbg(channel
->efx
, ifup
, channel
->efx
->net_dev
,
362 "chan %d start event queue\n", channel
->channel
);
364 /* Make sure the NAPI handler sees the enabled flag set */
365 channel
->enabled
= true;
368 napi_enable(&channel
->napi_str
);
369 efx_nic_eventq_read_ack(channel
);
372 /* Disable event queue processing and NAPI */
373 static void efx_stop_eventq(struct efx_channel
*channel
)
375 if (!channel
->enabled
)
378 napi_disable(&channel
->napi_str
);
379 channel
->enabled
= false;
382 static void efx_fini_eventq(struct efx_channel
*channel
)
384 if (!channel
->eventq_init
)
387 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
388 "chan %d fini event queue\n", channel
->channel
);
390 efx_nic_fini_eventq(channel
);
391 channel
->eventq_init
= false;
394 static void efx_remove_eventq(struct efx_channel
*channel
)
396 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
397 "chan %d remove event queue\n", channel
->channel
);
399 efx_nic_remove_eventq(channel
);
402 /**************************************************************************
406 *************************************************************************/
408 /* Allocate and initialise a channel structure. */
409 static struct efx_channel
*
410 efx_alloc_channel(struct efx_nic
*efx
, int i
, struct efx_channel
*old_channel
)
412 struct efx_channel
*channel
;
413 struct efx_rx_queue
*rx_queue
;
414 struct efx_tx_queue
*tx_queue
;
417 channel
= kzalloc(sizeof(*channel
), GFP_KERNEL
);
422 channel
->channel
= i
;
423 channel
->type
= &efx_default_channel_type
;
425 for (j
= 0; j
< EFX_TXQ_TYPES
; j
++) {
426 tx_queue
= &channel
->tx_queue
[j
];
428 tx_queue
->queue
= i
* EFX_TXQ_TYPES
+ j
;
429 tx_queue
->channel
= channel
;
432 rx_queue
= &channel
->rx_queue
;
434 setup_timer(&rx_queue
->slow_fill
, efx_rx_slow_fill
,
435 (unsigned long)rx_queue
);
440 /* Allocate and initialise a channel structure, copying parameters
441 * (but not resources) from an old channel structure.
443 static struct efx_channel
*
444 efx_copy_channel(const struct efx_channel
*old_channel
)
446 struct efx_channel
*channel
;
447 struct efx_rx_queue
*rx_queue
;
448 struct efx_tx_queue
*tx_queue
;
451 channel
= kmalloc(sizeof(*channel
), GFP_KERNEL
);
455 *channel
= *old_channel
;
457 channel
->napi_dev
= NULL
;
458 memset(&channel
->eventq
, 0, sizeof(channel
->eventq
));
460 for (j
= 0; j
< EFX_TXQ_TYPES
; j
++) {
461 tx_queue
= &channel
->tx_queue
[j
];
462 if (tx_queue
->channel
)
463 tx_queue
->channel
= channel
;
464 tx_queue
->buffer
= NULL
;
465 memset(&tx_queue
->txd
, 0, sizeof(tx_queue
->txd
));
468 rx_queue
= &channel
->rx_queue
;
469 rx_queue
->buffer
= NULL
;
470 memset(&rx_queue
->rxd
, 0, sizeof(rx_queue
->rxd
));
471 setup_timer(&rx_queue
->slow_fill
, efx_rx_slow_fill
,
472 (unsigned long)rx_queue
);
477 static int efx_probe_channel(struct efx_channel
*channel
)
479 struct efx_tx_queue
*tx_queue
;
480 struct efx_rx_queue
*rx_queue
;
483 netif_dbg(channel
->efx
, probe
, channel
->efx
->net_dev
,
484 "creating channel %d\n", channel
->channel
);
486 rc
= channel
->type
->pre_probe(channel
);
490 rc
= efx_probe_eventq(channel
);
494 efx_for_each_channel_tx_queue(tx_queue
, channel
) {
495 rc
= efx_probe_tx_queue(tx_queue
);
500 efx_for_each_channel_rx_queue(rx_queue
, channel
) {
501 rc
= efx_probe_rx_queue(rx_queue
);
509 efx_remove_channel(channel
);
514 efx_get_channel_name(struct efx_channel
*channel
, char *buf
, size_t len
)
516 struct efx_nic
*efx
= channel
->efx
;
520 number
= channel
->channel
;
521 if (efx
->tx_channel_offset
== 0) {
523 } else if (channel
->channel
< efx
->tx_channel_offset
) {
527 number
-= efx
->tx_channel_offset
;
529 snprintf(buf
, len
, "%s%s-%d", efx
->name
, type
, number
);
532 static void efx_set_channel_names(struct efx_nic
*efx
)
534 struct efx_channel
*channel
;
536 efx_for_each_channel(channel
, efx
)
537 channel
->type
->get_name(channel
,
538 efx
->msi_context
[channel
->channel
].name
,
539 sizeof(efx
->msi_context
[0].name
));
542 static int efx_probe_channels(struct efx_nic
*efx
)
544 struct efx_channel
*channel
;
547 /* Restart special buffer allocation */
548 efx
->next_buffer_table
= 0;
550 /* Probe channels in reverse, so that any 'extra' channels
551 * use the start of the buffer table. This allows the traffic
552 * channels to be resized without moving them or wasting the
553 * entries before them.
555 efx_for_each_channel_rev(channel
, efx
) {
556 rc
= efx_probe_channel(channel
);
558 netif_err(efx
, probe
, efx
->net_dev
,
559 "failed to create channel %d\n",
564 efx_set_channel_names(efx
);
569 efx_remove_channels(efx
);
573 /* Channels are shutdown and reinitialised whilst the NIC is running
574 * to propagate configuration changes (mtu, checksum offload), or
575 * to clear hardware error conditions
577 static void efx_start_datapath(struct efx_nic
*efx
)
579 bool old_rx_scatter
= efx
->rx_scatter
;
580 struct efx_tx_queue
*tx_queue
;
581 struct efx_rx_queue
*rx_queue
;
582 struct efx_channel
*channel
;
585 /* Calculate the rx buffer allocation parameters required to
586 * support the current MTU, including padding for header
587 * alignment and overruns.
589 efx
->rx_dma_len
= (efx
->rx_prefix_size
+
590 EFX_MAX_FRAME_LEN(efx
->net_dev
->mtu
) +
591 efx
->type
->rx_buffer_padding
);
592 rx_buf_len
= (sizeof(struct efx_rx_page_state
) +
593 efx
->rx_ip_align
+ efx
->rx_dma_len
);
594 if (rx_buf_len
<= PAGE_SIZE
) {
595 efx
->rx_scatter
= efx
->type
->always_rx_scatter
;
596 efx
->rx_buffer_order
= 0;
597 } else if (efx
->type
->can_rx_scatter
) {
598 BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE
% L1_CACHE_BYTES
);
599 BUILD_BUG_ON(sizeof(struct efx_rx_page_state
) +
600 2 * ALIGN(NET_IP_ALIGN
+ EFX_RX_USR_BUF_SIZE
,
601 EFX_RX_BUF_ALIGNMENT
) >
603 efx
->rx_scatter
= true;
604 efx
->rx_dma_len
= EFX_RX_USR_BUF_SIZE
;
605 efx
->rx_buffer_order
= 0;
607 efx
->rx_scatter
= false;
608 efx
->rx_buffer_order
= get_order(rx_buf_len
);
611 efx_rx_config_page_split(efx
);
612 if (efx
->rx_buffer_order
)
613 netif_dbg(efx
, drv
, efx
->net_dev
,
614 "RX buf len=%u; page order=%u batch=%u\n",
615 efx
->rx_dma_len
, efx
->rx_buffer_order
,
616 efx
->rx_pages_per_batch
);
618 netif_dbg(efx
, drv
, efx
->net_dev
,
619 "RX buf len=%u step=%u bpp=%u; page batch=%u\n",
620 efx
->rx_dma_len
, efx
->rx_page_buf_step
,
621 efx
->rx_bufs_per_page
, efx
->rx_pages_per_batch
);
623 /* RX filters may also have scatter-enabled flags */
624 if (efx
->rx_scatter
!= old_rx_scatter
)
625 efx
->type
->filter_update_rx_scatter(efx
);
627 /* We must keep at least one descriptor in a TX ring empty.
628 * We could avoid this when the queue size does not exactly
629 * match the hardware ring size, but it's not that important.
630 * Therefore we stop the queue when one more skb might fill
631 * the ring completely. We wake it when half way back to
634 efx
->txq_stop_thresh
= efx
->txq_entries
- efx_tx_max_skb_descs(efx
);
635 efx
->txq_wake_thresh
= efx
->txq_stop_thresh
/ 2;
637 /* Initialise the channels */
638 efx_for_each_channel(channel
, efx
) {
639 efx_for_each_channel_tx_queue(tx_queue
, channel
) {
640 efx_init_tx_queue(tx_queue
);
641 atomic_inc(&efx
->active_queues
);
644 efx_for_each_channel_rx_queue(rx_queue
, channel
) {
645 efx_init_rx_queue(rx_queue
);
646 atomic_inc(&efx
->active_queues
);
647 efx_stop_eventq(channel
);
648 efx_fast_push_rx_descriptors(rx_queue
, false);
649 efx_start_eventq(channel
);
652 WARN_ON(channel
->rx_pkt_n_frags
);
655 efx_ptp_start_datapath(efx
);
657 if (netif_device_present(efx
->net_dev
))
658 netif_tx_wake_all_queues(efx
->net_dev
);
661 static void efx_stop_datapath(struct efx_nic
*efx
)
663 struct efx_channel
*channel
;
664 struct efx_tx_queue
*tx_queue
;
665 struct efx_rx_queue
*rx_queue
;
668 EFX_ASSERT_RESET_SERIALISED(efx
);
669 BUG_ON(efx
->port_enabled
);
671 efx_ptp_stop_datapath(efx
);
674 efx_for_each_channel(channel
, efx
) {
675 efx_for_each_channel_rx_queue(rx_queue
, channel
)
676 rx_queue
->refill_enabled
= false;
679 efx_for_each_channel(channel
, efx
) {
680 /* RX packet processing is pipelined, so wait for the
681 * NAPI handler to complete. At least event queue 0
682 * might be kept active by non-data events, so don't
683 * use napi_synchronize() but actually disable NAPI
686 if (efx_channel_has_rx_queue(channel
)) {
687 efx_stop_eventq(channel
);
688 efx_start_eventq(channel
);
692 rc
= efx
->type
->fini_dmaq(efx
);
693 if (rc
&& EFX_WORKAROUND_7803(efx
)) {
694 /* Schedule a reset to recover from the flush failure. The
695 * descriptor caches reference memory we're about to free,
696 * but falcon_reconfigure_mac_wrapper() won't reconnect
697 * the MACs because of the pending reset.
699 netif_err(efx
, drv
, efx
->net_dev
,
700 "Resetting to recover from flush failure\n");
701 efx_schedule_reset(efx
, RESET_TYPE_ALL
);
703 netif_err(efx
, drv
, efx
->net_dev
, "failed to flush queues\n");
705 netif_dbg(efx
, drv
, efx
->net_dev
,
706 "successfully flushed all queues\n");
709 efx_for_each_channel(channel
, efx
) {
710 efx_for_each_channel_rx_queue(rx_queue
, channel
)
711 efx_fini_rx_queue(rx_queue
);
712 efx_for_each_possible_channel_tx_queue(tx_queue
, channel
)
713 efx_fini_tx_queue(tx_queue
);
717 static void efx_remove_channel(struct efx_channel
*channel
)
719 struct efx_tx_queue
*tx_queue
;
720 struct efx_rx_queue
*rx_queue
;
722 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
723 "destroy chan %d\n", channel
->channel
);
725 efx_for_each_channel_rx_queue(rx_queue
, channel
)
726 efx_remove_rx_queue(rx_queue
);
727 efx_for_each_possible_channel_tx_queue(tx_queue
, channel
)
728 efx_remove_tx_queue(tx_queue
);
729 efx_remove_eventq(channel
);
730 channel
->type
->post_remove(channel
);
733 static void efx_remove_channels(struct efx_nic
*efx
)
735 struct efx_channel
*channel
;
737 efx_for_each_channel(channel
, efx
)
738 efx_remove_channel(channel
);
742 efx_realloc_channels(struct efx_nic
*efx
, u32 rxq_entries
, u32 txq_entries
)
744 struct efx_channel
*other_channel
[EFX_MAX_CHANNELS
], *channel
;
745 u32 old_rxq_entries
, old_txq_entries
;
746 unsigned i
, next_buffer_table
= 0;
749 rc
= efx_check_disabled(efx
);
753 /* Not all channels should be reallocated. We must avoid
754 * reallocating their buffer table entries.
756 efx_for_each_channel(channel
, efx
) {
757 struct efx_rx_queue
*rx_queue
;
758 struct efx_tx_queue
*tx_queue
;
760 if (channel
->type
->copy
)
762 next_buffer_table
= max(next_buffer_table
,
763 channel
->eventq
.index
+
764 channel
->eventq
.entries
);
765 efx_for_each_channel_rx_queue(rx_queue
, channel
)
766 next_buffer_table
= max(next_buffer_table
,
767 rx_queue
->rxd
.index
+
768 rx_queue
->rxd
.entries
);
769 efx_for_each_channel_tx_queue(tx_queue
, channel
)
770 next_buffer_table
= max(next_buffer_table
,
771 tx_queue
->txd
.index
+
772 tx_queue
->txd
.entries
);
775 efx_device_detach_sync(efx
);
777 efx_soft_disable_interrupts(efx
);
779 /* Clone channels (where possible) */
780 memset(other_channel
, 0, sizeof(other_channel
));
781 for (i
= 0; i
< efx
->n_channels
; i
++) {
782 channel
= efx
->channel
[i
];
783 if (channel
->type
->copy
)
784 channel
= channel
->type
->copy(channel
);
789 other_channel
[i
] = channel
;
792 /* Swap entry counts and channel pointers */
793 old_rxq_entries
= efx
->rxq_entries
;
794 old_txq_entries
= efx
->txq_entries
;
795 efx
->rxq_entries
= rxq_entries
;
796 efx
->txq_entries
= txq_entries
;
797 for (i
= 0; i
< efx
->n_channels
; i
++) {
798 channel
= efx
->channel
[i
];
799 efx
->channel
[i
] = other_channel
[i
];
800 other_channel
[i
] = channel
;
803 /* Restart buffer table allocation */
804 efx
->next_buffer_table
= next_buffer_table
;
806 for (i
= 0; i
< efx
->n_channels
; i
++) {
807 channel
= efx
->channel
[i
];
808 if (!channel
->type
->copy
)
810 rc
= efx_probe_channel(channel
);
813 efx_init_napi_channel(efx
->channel
[i
]);
817 /* Destroy unused channel structures */
818 for (i
= 0; i
< efx
->n_channels
; i
++) {
819 channel
= other_channel
[i
];
820 if (channel
&& channel
->type
->copy
) {
821 efx_fini_napi_channel(channel
);
822 efx_remove_channel(channel
);
827 rc2
= efx_soft_enable_interrupts(efx
);
830 netif_err(efx
, drv
, efx
->net_dev
,
831 "unable to restart interrupts on channel reallocation\n");
832 efx_schedule_reset(efx
, RESET_TYPE_DISABLE
);
835 netif_device_attach(efx
->net_dev
);
841 efx
->rxq_entries
= old_rxq_entries
;
842 efx
->txq_entries
= old_txq_entries
;
843 for (i
= 0; i
< efx
->n_channels
; i
++) {
844 channel
= efx
->channel
[i
];
845 efx
->channel
[i
] = other_channel
[i
];
846 other_channel
[i
] = channel
;
851 void efx_schedule_slow_fill(struct efx_rx_queue
*rx_queue
)
853 mod_timer(&rx_queue
->slow_fill
, jiffies
+ msecs_to_jiffies(100));
856 static const struct efx_channel_type efx_default_channel_type
= {
857 .pre_probe
= efx_channel_dummy_op_int
,
858 .post_remove
= efx_channel_dummy_op_void
,
859 .get_name
= efx_get_channel_name
,
860 .copy
= efx_copy_channel
,
861 .keep_eventq
= false,
864 int efx_channel_dummy_op_int(struct efx_channel
*channel
)
869 void efx_channel_dummy_op_void(struct efx_channel
*channel
)
873 /**************************************************************************
877 **************************************************************************/
879 /* This ensures that the kernel is kept informed (via
880 * netif_carrier_on/off) of the link status, and also maintains the
881 * link status's stop on the port's TX queue.
883 void efx_link_status_changed(struct efx_nic
*efx
)
885 struct efx_link_state
*link_state
= &efx
->link_state
;
887 /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
888 * that no events are triggered between unregister_netdev() and the
889 * driver unloading. A more general condition is that NETDEV_CHANGE
890 * can only be generated between NETDEV_UP and NETDEV_DOWN */
891 if (!netif_running(efx
->net_dev
))
894 if (link_state
->up
!= netif_carrier_ok(efx
->net_dev
)) {
895 efx
->n_link_state_changes
++;
898 netif_carrier_on(efx
->net_dev
);
900 netif_carrier_off(efx
->net_dev
);
903 /* Status message for kernel log */
905 netif_info(efx
, link
, efx
->net_dev
,
906 "link up at %uMbps %s-duplex (MTU %d)\n",
907 link_state
->speed
, link_state
->fd
? "full" : "half",
910 netif_info(efx
, link
, efx
->net_dev
, "link down\n");
913 void efx_link_set_advertising(struct efx_nic
*efx
, u32 advertising
)
915 efx
->link_advertising
= advertising
;
917 if (advertising
& ADVERTISED_Pause
)
918 efx
->wanted_fc
|= (EFX_FC_TX
| EFX_FC_RX
);
920 efx
->wanted_fc
&= ~(EFX_FC_TX
| EFX_FC_RX
);
921 if (advertising
& ADVERTISED_Asym_Pause
)
922 efx
->wanted_fc
^= EFX_FC_TX
;
926 void efx_link_set_wanted_fc(struct efx_nic
*efx
, u8 wanted_fc
)
928 efx
->wanted_fc
= wanted_fc
;
929 if (efx
->link_advertising
) {
930 if (wanted_fc
& EFX_FC_RX
)
931 efx
->link_advertising
|= (ADVERTISED_Pause
|
932 ADVERTISED_Asym_Pause
);
934 efx
->link_advertising
&= ~(ADVERTISED_Pause
|
935 ADVERTISED_Asym_Pause
);
936 if (wanted_fc
& EFX_FC_TX
)
937 efx
->link_advertising
^= ADVERTISED_Asym_Pause
;
941 static void efx_fini_port(struct efx_nic
*efx
);
943 /* Push loopback/power/transmit disable settings to the PHY, and reconfigure
944 * the MAC appropriately. All other PHY configuration changes are pushed
945 * through phy_op->set_settings(), and pushed asynchronously to the MAC
946 * through efx_monitor().
948 * Callers must hold the mac_lock
950 int __efx_reconfigure_port(struct efx_nic
*efx
)
952 enum efx_phy_mode phy_mode
;
955 WARN_ON(!mutex_is_locked(&efx
->mac_lock
));
957 /* Disable PHY transmit in mac level loopbacks */
958 phy_mode
= efx
->phy_mode
;
959 if (LOOPBACK_INTERNAL(efx
))
960 efx
->phy_mode
|= PHY_MODE_TX_DISABLED
;
962 efx
->phy_mode
&= ~PHY_MODE_TX_DISABLED
;
964 rc
= efx
->type
->reconfigure_port(efx
);
967 efx
->phy_mode
= phy_mode
;
972 /* Reinitialise the MAC to pick up new PHY settings, even if the port is
974 int efx_reconfigure_port(struct efx_nic
*efx
)
978 EFX_ASSERT_RESET_SERIALISED(efx
);
980 mutex_lock(&efx
->mac_lock
);
981 rc
= __efx_reconfigure_port(efx
);
982 mutex_unlock(&efx
->mac_lock
);
987 /* Asynchronous work item for changing MAC promiscuity and multicast
988 * hash. Avoid a drain/rx_ingress enable by reconfiguring the current
990 static void efx_mac_work(struct work_struct
*data
)
992 struct efx_nic
*efx
= container_of(data
, struct efx_nic
, mac_work
);
994 mutex_lock(&efx
->mac_lock
);
995 if (efx
->port_enabled
)
996 efx
->type
->reconfigure_mac(efx
);
997 mutex_unlock(&efx
->mac_lock
);
1000 static int efx_probe_port(struct efx_nic
*efx
)
1004 netif_dbg(efx
, probe
, efx
->net_dev
, "create port\n");
1007 efx
->phy_mode
= PHY_MODE_SPECIAL
;
1009 /* Connect up MAC/PHY operations table */
1010 rc
= efx
->type
->probe_port(efx
);
1014 /* Initialise MAC address to permanent address */
1015 ether_addr_copy(efx
->net_dev
->dev_addr
, efx
->net_dev
->perm_addr
);
1020 static int efx_init_port(struct efx_nic
*efx
)
1024 netif_dbg(efx
, drv
, efx
->net_dev
, "init port\n");
1026 mutex_lock(&efx
->mac_lock
);
1028 rc
= efx
->phy_op
->init(efx
);
1032 efx
->port_initialized
= true;
1034 /* Reconfigure the MAC before creating dma queues (required for
1035 * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */
1036 efx
->type
->reconfigure_mac(efx
);
1038 /* Ensure the PHY advertises the correct flow control settings */
1039 rc
= efx
->phy_op
->reconfigure(efx
);
1043 mutex_unlock(&efx
->mac_lock
);
1047 efx
->phy_op
->fini(efx
);
1049 mutex_unlock(&efx
->mac_lock
);
1053 static void efx_start_port(struct efx_nic
*efx
)
1055 netif_dbg(efx
, ifup
, efx
->net_dev
, "start port\n");
1056 BUG_ON(efx
->port_enabled
);
1058 mutex_lock(&efx
->mac_lock
);
1059 efx
->port_enabled
= true;
1061 /* Ensure MAC ingress/egress is enabled */
1062 efx
->type
->reconfigure_mac(efx
);
1064 mutex_unlock(&efx
->mac_lock
);
1067 /* Cancel work for MAC reconfiguration, periodic hardware monitoring
1068 * and the async self-test, wait for them to finish and prevent them
1069 * being scheduled again. This doesn't cover online resets, which
1070 * should only be cancelled when removing the device.
1072 static void efx_stop_port(struct efx_nic
*efx
)
1074 netif_dbg(efx
, ifdown
, efx
->net_dev
, "stop port\n");
1076 EFX_ASSERT_RESET_SERIALISED(efx
);
1078 mutex_lock(&efx
->mac_lock
);
1079 efx
->port_enabled
= false;
1080 mutex_unlock(&efx
->mac_lock
);
1082 /* Serialise against efx_set_multicast_list() */
1083 netif_addr_lock_bh(efx
->net_dev
);
1084 netif_addr_unlock_bh(efx
->net_dev
);
1086 cancel_delayed_work_sync(&efx
->monitor_work
);
1087 efx_selftest_async_cancel(efx
);
1088 cancel_work_sync(&efx
->mac_work
);
1091 static void efx_fini_port(struct efx_nic
*efx
)
1093 netif_dbg(efx
, drv
, efx
->net_dev
, "shut down port\n");
1095 if (!efx
->port_initialized
)
1098 efx
->phy_op
->fini(efx
);
1099 efx
->port_initialized
= false;
1101 efx
->link_state
.up
= false;
1102 efx_link_status_changed(efx
);
1105 static void efx_remove_port(struct efx_nic
*efx
)
1107 netif_dbg(efx
, drv
, efx
->net_dev
, "destroying port\n");
1109 efx
->type
->remove_port(efx
);
1112 /**************************************************************************
1116 **************************************************************************/
1118 static LIST_HEAD(efx_primary_list
);
1119 static LIST_HEAD(efx_unassociated_list
);
1121 static bool efx_same_controller(struct efx_nic
*left
, struct efx_nic
*right
)
1123 return left
->type
== right
->type
&&
1124 left
->vpd_sn
&& right
->vpd_sn
&&
1125 !strcmp(left
->vpd_sn
, right
->vpd_sn
);
1128 static void efx_associate(struct efx_nic
*efx
)
1130 struct efx_nic
*other
, *next
;
1132 if (efx
->primary
== efx
) {
1133 /* Adding primary function; look for secondaries */
1135 netif_dbg(efx
, probe
, efx
->net_dev
, "adding to primary list\n");
1136 list_add_tail(&efx
->node
, &efx_primary_list
);
1138 list_for_each_entry_safe(other
, next
, &efx_unassociated_list
,
1140 if (efx_same_controller(efx
, other
)) {
1141 list_del(&other
->node
);
1142 netif_dbg(other
, probe
, other
->net_dev
,
1143 "moving to secondary list of %s %s\n",
1144 pci_name(efx
->pci_dev
),
1145 efx
->net_dev
->name
);
1146 list_add_tail(&other
->node
,
1147 &efx
->secondary_list
);
1148 other
->primary
= efx
;
1152 /* Adding secondary function; look for primary */
1154 list_for_each_entry(other
, &efx_primary_list
, node
) {
1155 if (efx_same_controller(efx
, other
)) {
1156 netif_dbg(efx
, probe
, efx
->net_dev
,
1157 "adding to secondary list of %s %s\n",
1158 pci_name(other
->pci_dev
),
1159 other
->net_dev
->name
);
1160 list_add_tail(&efx
->node
,
1161 &other
->secondary_list
);
1162 efx
->primary
= other
;
1167 netif_dbg(efx
, probe
, efx
->net_dev
,
1168 "adding to unassociated list\n");
1169 list_add_tail(&efx
->node
, &efx_unassociated_list
);
1173 static void efx_dissociate(struct efx_nic
*efx
)
1175 struct efx_nic
*other
, *next
;
1177 list_del(&efx
->node
);
1178 efx
->primary
= NULL
;
1180 list_for_each_entry_safe(other
, next
, &efx
->secondary_list
, node
) {
1181 list_del(&other
->node
);
1182 netif_dbg(other
, probe
, other
->net_dev
,
1183 "moving to unassociated list\n");
1184 list_add_tail(&other
->node
, &efx_unassociated_list
);
1185 other
->primary
= NULL
;
1189 /* This configures the PCI device to enable I/O and DMA. */
1190 static int efx_init_io(struct efx_nic
*efx
)
1192 struct pci_dev
*pci_dev
= efx
->pci_dev
;
1193 dma_addr_t dma_mask
= efx
->type
->max_dma_mask
;
1194 unsigned int mem_map_size
= efx
->type
->mem_map_size(efx
);
1197 netif_dbg(efx
, probe
, efx
->net_dev
, "initialising I/O\n");
1199 rc
= pci_enable_device(pci_dev
);
1201 netif_err(efx
, probe
, efx
->net_dev
,
1202 "failed to enable PCI device\n");
1206 pci_set_master(pci_dev
);
1208 /* Set the PCI DMA mask. Try all possibilities from our
1209 * genuine mask down to 32 bits, because some architectures
1210 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
1211 * masks event though they reject 46 bit masks.
1213 while (dma_mask
> 0x7fffffffUL
) {
1214 if (dma_supported(&pci_dev
->dev
, dma_mask
)) {
1215 rc
= dma_set_mask_and_coherent(&pci_dev
->dev
, dma_mask
);
1222 netif_err(efx
, probe
, efx
->net_dev
,
1223 "could not find a suitable DMA mask\n");
1226 netif_dbg(efx
, probe
, efx
->net_dev
,
1227 "using DMA mask %llx\n", (unsigned long long) dma_mask
);
1229 efx
->membase_phys
= pci_resource_start(efx
->pci_dev
, EFX_MEM_BAR
);
1230 rc
= pci_request_region(pci_dev
, EFX_MEM_BAR
, "sfc");
1232 netif_err(efx
, probe
, efx
->net_dev
,
1233 "request for memory BAR failed\n");
1237 efx
->membase
= ioremap_nocache(efx
->membase_phys
, mem_map_size
);
1238 if (!efx
->membase
) {
1239 netif_err(efx
, probe
, efx
->net_dev
,
1240 "could not map memory BAR at %llx+%x\n",
1241 (unsigned long long)efx
->membase_phys
, mem_map_size
);
1245 netif_dbg(efx
, probe
, efx
->net_dev
,
1246 "memory BAR at %llx+%x (virtual %p)\n",
1247 (unsigned long long)efx
->membase_phys
, mem_map_size
,
1253 pci_release_region(efx
->pci_dev
, EFX_MEM_BAR
);
1255 efx
->membase_phys
= 0;
1257 pci_disable_device(efx
->pci_dev
);
1262 static void efx_fini_io(struct efx_nic
*efx
)
1264 netif_dbg(efx
, drv
, efx
->net_dev
, "shutting down I/O\n");
1267 iounmap(efx
->membase
);
1268 efx
->membase
= NULL
;
1271 if (efx
->membase_phys
) {
1272 pci_release_region(efx
->pci_dev
, EFX_MEM_BAR
);
1273 efx
->membase_phys
= 0;
1276 pci_disable_device(efx
->pci_dev
);
1279 static unsigned int efx_wanted_parallelism(struct efx_nic
*efx
)
1281 cpumask_var_t thread_mask
;
1288 if (unlikely(!zalloc_cpumask_var(&thread_mask
, GFP_KERNEL
))) {
1289 netif_warn(efx
, probe
, efx
->net_dev
,
1290 "RSS disabled due to allocation failure\n");
1295 for_each_online_cpu(cpu
) {
1296 if (!cpumask_test_cpu(cpu
, thread_mask
)) {
1298 cpumask_or(thread_mask
, thread_mask
,
1299 topology_thread_cpumask(cpu
));
1303 free_cpumask_var(thread_mask
);
1306 /* If RSS is requested for the PF *and* VFs then we can't write RSS
1307 * table entries that are inaccessible to VFs
1309 if (efx_sriov_wanted(efx
) && efx_vf_size(efx
) > 1 &&
1310 count
> efx_vf_size(efx
)) {
1311 netif_warn(efx
, probe
, efx
->net_dev
,
1312 "Reducing number of RSS channels from %u to %u for "
1313 "VF support. Increase vf-msix-limit to use more "
1314 "channels on the PF.\n",
1315 count
, efx_vf_size(efx
));
1316 count
= efx_vf_size(efx
);
1322 /* Probe the number and type of interrupts we are able to obtain, and
1323 * the resulting numbers of channels and RX queues.
1325 static int efx_probe_interrupts(struct efx_nic
*efx
)
1327 unsigned int extra_channels
= 0;
1331 for (i
= 0; i
< EFX_MAX_EXTRA_CHANNELS
; i
++)
1332 if (efx
->extra_channel_type
[i
])
1335 if (efx
->interrupt_mode
== EFX_INT_MODE_MSIX
) {
1336 struct msix_entry xentries
[EFX_MAX_CHANNELS
];
1337 unsigned int n_channels
;
1339 n_channels
= efx_wanted_parallelism(efx
);
1340 if (separate_tx_channels
)
1342 n_channels
+= extra_channels
;
1343 n_channels
= min(n_channels
, efx
->max_channels
);
1345 for (i
= 0; i
< n_channels
; i
++)
1346 xentries
[i
].entry
= i
;
1347 rc
= pci_enable_msix_range(efx
->pci_dev
,
1348 xentries
, 1, n_channels
);
1350 /* Fall back to single channel MSI */
1351 efx
->interrupt_mode
= EFX_INT_MODE_MSI
;
1352 netif_err(efx
, drv
, efx
->net_dev
,
1353 "could not enable MSI-X\n");
1354 } else if (rc
< n_channels
) {
1355 netif_err(efx
, drv
, efx
->net_dev
,
1356 "WARNING: Insufficient MSI-X vectors"
1357 " available (%d < %u).\n", rc
, n_channels
);
1358 netif_err(efx
, drv
, efx
->net_dev
,
1359 "WARNING: Performance may be reduced.\n");
1364 efx
->n_channels
= n_channels
;
1365 if (n_channels
> extra_channels
)
1366 n_channels
-= extra_channels
;
1367 if (separate_tx_channels
) {
1368 efx
->n_tx_channels
= max(n_channels
/ 2, 1U);
1369 efx
->n_rx_channels
= max(n_channels
-
1373 efx
->n_tx_channels
= n_channels
;
1374 efx
->n_rx_channels
= n_channels
;
1376 for (i
= 0; i
< efx
->n_channels
; i
++)
1377 efx_get_channel(efx
, i
)->irq
=
1382 /* Try single interrupt MSI */
1383 if (efx
->interrupt_mode
== EFX_INT_MODE_MSI
) {
1384 efx
->n_channels
= 1;
1385 efx
->n_rx_channels
= 1;
1386 efx
->n_tx_channels
= 1;
1387 rc
= pci_enable_msi(efx
->pci_dev
);
1389 efx_get_channel(efx
, 0)->irq
= efx
->pci_dev
->irq
;
1391 netif_err(efx
, drv
, efx
->net_dev
,
1392 "could not enable MSI\n");
1393 efx
->interrupt_mode
= EFX_INT_MODE_LEGACY
;
1397 /* Assume legacy interrupts */
1398 if (efx
->interrupt_mode
== EFX_INT_MODE_LEGACY
) {
1399 efx
->n_channels
= 1 + (separate_tx_channels
? 1 : 0);
1400 efx
->n_rx_channels
= 1;
1401 efx
->n_tx_channels
= 1;
1402 efx
->legacy_irq
= efx
->pci_dev
->irq
;
1405 /* Assign extra channels if possible */
1406 j
= efx
->n_channels
;
1407 for (i
= 0; i
< EFX_MAX_EXTRA_CHANNELS
; i
++) {
1408 if (!efx
->extra_channel_type
[i
])
1410 if (efx
->interrupt_mode
!= EFX_INT_MODE_MSIX
||
1411 efx
->n_channels
<= extra_channels
) {
1412 efx
->extra_channel_type
[i
]->handle_no_channel(efx
);
1415 efx_get_channel(efx
, j
)->type
=
1416 efx
->extra_channel_type
[i
];
1420 /* RSS might be usable on VFs even if it is disabled on the PF */
1421 efx
->rss_spread
= ((efx
->n_rx_channels
> 1 || !efx_sriov_wanted(efx
)) ?
1422 efx
->n_rx_channels
: efx_vf_size(efx
));
1427 static int efx_soft_enable_interrupts(struct efx_nic
*efx
)
1429 struct efx_channel
*channel
, *end_channel
;
1432 BUG_ON(efx
->state
== STATE_DISABLED
);
1434 efx
->irq_soft_enabled
= true;
1437 efx_for_each_channel(channel
, efx
) {
1438 if (!channel
->type
->keep_eventq
) {
1439 rc
= efx_init_eventq(channel
);
1443 efx_start_eventq(channel
);
1446 efx_mcdi_mode_event(efx
);
1450 end_channel
= channel
;
1451 efx_for_each_channel(channel
, efx
) {
1452 if (channel
== end_channel
)
1454 efx_stop_eventq(channel
);
1455 if (!channel
->type
->keep_eventq
)
1456 efx_fini_eventq(channel
);
1462 static void efx_soft_disable_interrupts(struct efx_nic
*efx
)
1464 struct efx_channel
*channel
;
1466 if (efx
->state
== STATE_DISABLED
)
1469 efx_mcdi_mode_poll(efx
);
1471 efx
->irq_soft_enabled
= false;
1474 if (efx
->legacy_irq
)
1475 synchronize_irq(efx
->legacy_irq
);
1477 efx_for_each_channel(channel
, efx
) {
1479 synchronize_irq(channel
->irq
);
1481 efx_stop_eventq(channel
);
1482 if (!channel
->type
->keep_eventq
)
1483 efx_fini_eventq(channel
);
1486 /* Flush the asynchronous MCDI request queue */
1487 efx_mcdi_flush_async(efx
);
1490 static int efx_enable_interrupts(struct efx_nic
*efx
)
1492 struct efx_channel
*channel
, *end_channel
;
1495 BUG_ON(efx
->state
== STATE_DISABLED
);
1497 if (efx
->eeh_disabled_legacy_irq
) {
1498 enable_irq(efx
->legacy_irq
);
1499 efx
->eeh_disabled_legacy_irq
= false;
1502 efx
->type
->irq_enable_master(efx
);
1504 efx_for_each_channel(channel
, efx
) {
1505 if (channel
->type
->keep_eventq
) {
1506 rc
= efx_init_eventq(channel
);
1512 rc
= efx_soft_enable_interrupts(efx
);
1519 end_channel
= channel
;
1520 efx_for_each_channel(channel
, efx
) {
1521 if (channel
== end_channel
)
1523 if (channel
->type
->keep_eventq
)
1524 efx_fini_eventq(channel
);
1527 efx
->type
->irq_disable_non_ev(efx
);
1532 static void efx_disable_interrupts(struct efx_nic
*efx
)
1534 struct efx_channel
*channel
;
1536 efx_soft_disable_interrupts(efx
);
1538 efx_for_each_channel(channel
, efx
) {
1539 if (channel
->type
->keep_eventq
)
1540 efx_fini_eventq(channel
);
1543 efx
->type
->irq_disable_non_ev(efx
);
1546 static void efx_remove_interrupts(struct efx_nic
*efx
)
1548 struct efx_channel
*channel
;
1550 /* Remove MSI/MSI-X interrupts */
1551 efx_for_each_channel(channel
, efx
)
1553 pci_disable_msi(efx
->pci_dev
);
1554 pci_disable_msix(efx
->pci_dev
);
1556 /* Remove legacy interrupt */
1557 efx
->legacy_irq
= 0;
1560 static void efx_set_channels(struct efx_nic
*efx
)
1562 struct efx_channel
*channel
;
1563 struct efx_tx_queue
*tx_queue
;
1565 efx
->tx_channel_offset
=
1566 separate_tx_channels
? efx
->n_channels
- efx
->n_tx_channels
: 0;
1568 /* We need to mark which channels really have RX and TX
1569 * queues, and adjust the TX queue numbers if we have separate
1570 * RX-only and TX-only channels.
1572 efx_for_each_channel(channel
, efx
) {
1573 if (channel
->channel
< efx
->n_rx_channels
)
1574 channel
->rx_queue
.core_index
= channel
->channel
;
1576 channel
->rx_queue
.core_index
= -1;
1578 efx_for_each_channel_tx_queue(tx_queue
, channel
)
1579 tx_queue
->queue
-= (efx
->tx_channel_offset
*
1584 static int efx_probe_nic(struct efx_nic
*efx
)
1589 netif_dbg(efx
, probe
, efx
->net_dev
, "creating NIC\n");
1591 /* Carry out hardware-type specific initialisation */
1592 rc
= efx
->type
->probe(efx
);
1596 /* Determine the number of channels and queues by trying to hook
1597 * in MSI-X interrupts. */
1598 rc
= efx_probe_interrupts(efx
);
1602 efx_set_channels(efx
);
1604 rc
= efx
->type
->dimension_resources(efx
);
1608 if (efx
->n_channels
> 1)
1609 get_random_bytes(&efx
->rx_hash_key
, sizeof(efx
->rx_hash_key
));
1610 for (i
= 0; i
< ARRAY_SIZE(efx
->rx_indir_table
); i
++)
1611 efx
->rx_indir_table
[i
] =
1612 ethtool_rxfh_indir_default(i
, efx
->rss_spread
);
1614 netif_set_real_num_tx_queues(efx
->net_dev
, efx
->n_tx_channels
);
1615 netif_set_real_num_rx_queues(efx
->net_dev
, efx
->n_rx_channels
);
1617 /* Initialise the interrupt moderation settings */
1618 efx_init_irq_moderation(efx
, tx_irq_mod_usec
, rx_irq_mod_usec
, true,
1624 efx_remove_interrupts(efx
);
1626 efx
->type
->remove(efx
);
1630 static void efx_remove_nic(struct efx_nic
*efx
)
1632 netif_dbg(efx
, drv
, efx
->net_dev
, "destroying NIC\n");
1634 efx_remove_interrupts(efx
);
1635 efx
->type
->remove(efx
);
1638 static int efx_probe_filters(struct efx_nic
*efx
)
1642 spin_lock_init(&efx
->filter_lock
);
1644 rc
= efx
->type
->filter_table_probe(efx
);
1648 #ifdef CONFIG_RFS_ACCEL
1649 if (efx
->type
->offload_features
& NETIF_F_NTUPLE
) {
1650 efx
->rps_flow_id
= kcalloc(efx
->type
->max_rx_ip_filters
,
1651 sizeof(*efx
->rps_flow_id
),
1653 if (!efx
->rps_flow_id
) {
1654 efx
->type
->filter_table_remove(efx
);
1663 static void efx_remove_filters(struct efx_nic
*efx
)
1665 #ifdef CONFIG_RFS_ACCEL
1666 kfree(efx
->rps_flow_id
);
1668 efx
->type
->filter_table_remove(efx
);
1671 static void efx_restore_filters(struct efx_nic
*efx
)
1673 efx
->type
->filter_table_restore(efx
);
1676 /**************************************************************************
1678 * NIC startup/shutdown
1680 *************************************************************************/
1682 static int efx_probe_all(struct efx_nic
*efx
)
1686 rc
= efx_probe_nic(efx
);
1688 netif_err(efx
, probe
, efx
->net_dev
, "failed to create NIC\n");
1692 rc
= efx_probe_port(efx
);
1694 netif_err(efx
, probe
, efx
->net_dev
, "failed to create port\n");
1698 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE
< EFX_RXQ_MIN_ENT
);
1699 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE
< EFX_TXQ_MIN_ENT(efx
))) {
1703 efx
->rxq_entries
= efx
->txq_entries
= EFX_DEFAULT_DMAQ_SIZE
;
1705 rc
= efx_probe_filters(efx
);
1707 netif_err(efx
, probe
, efx
->net_dev
,
1708 "failed to create filter tables\n");
1712 rc
= efx_probe_channels(efx
);
1719 efx_remove_filters(efx
);
1721 efx_remove_port(efx
);
1723 efx_remove_nic(efx
);
1728 /* If the interface is supposed to be running but is not, start
1729 * the hardware and software data path, regular activity for the port
1730 * (MAC statistics, link polling, etc.) and schedule the port to be
1731 * reconfigured. Interrupts must already be enabled. This function
1732 * is safe to call multiple times, so long as the NIC is not disabled.
1733 * Requires the RTNL lock.
1735 static void efx_start_all(struct efx_nic
*efx
)
1737 EFX_ASSERT_RESET_SERIALISED(efx
);
1738 BUG_ON(efx
->state
== STATE_DISABLED
);
1740 /* Check that it is appropriate to restart the interface. All
1741 * of these flags are safe to read under just the rtnl lock */
1742 if (efx
->port_enabled
|| !netif_running(efx
->net_dev
))
1745 efx_start_port(efx
);
1746 efx_start_datapath(efx
);
1748 /* Start the hardware monitor if there is one */
1749 if (efx
->type
->monitor
!= NULL
)
1750 queue_delayed_work(efx
->workqueue
, &efx
->monitor_work
,
1751 efx_monitor_interval
);
1753 /* If link state detection is normally event-driven, we have
1754 * to poll now because we could have missed a change
1756 if (efx_nic_rev(efx
) >= EFX_REV_SIENA_A0
) {
1757 mutex_lock(&efx
->mac_lock
);
1758 if (efx
->phy_op
->poll(efx
))
1759 efx_link_status_changed(efx
);
1760 mutex_unlock(&efx
->mac_lock
);
1763 efx
->type
->start_stats(efx
);
1764 efx
->type
->pull_stats(efx
);
1765 spin_lock_bh(&efx
->stats_lock
);
1766 efx
->type
->update_stats(efx
, NULL
, NULL
);
1767 spin_unlock_bh(&efx
->stats_lock
);
1770 /* Quiesce the hardware and software data path, and regular activity
1771 * for the port without bringing the link down. Safe to call multiple
1772 * times with the NIC in almost any state, but interrupts should be
1773 * enabled. Requires the RTNL lock.
1775 static void efx_stop_all(struct efx_nic
*efx
)
1777 EFX_ASSERT_RESET_SERIALISED(efx
);
1779 /* port_enabled can be read safely under the rtnl lock */
1780 if (!efx
->port_enabled
)
1783 /* update stats before we go down so we can accurately count
1786 efx
->type
->pull_stats(efx
);
1787 spin_lock_bh(&efx
->stats_lock
);
1788 efx
->type
->update_stats(efx
, NULL
, NULL
);
1789 spin_unlock_bh(&efx
->stats_lock
);
1790 efx
->type
->stop_stats(efx
);
1793 /* Stop the kernel transmit interface. This is only valid if
1794 * the device is stopped or detached; otherwise the watchdog
1795 * may fire immediately.
1797 WARN_ON(netif_running(efx
->net_dev
) &&
1798 netif_device_present(efx
->net_dev
));
1799 netif_tx_disable(efx
->net_dev
);
1801 efx_stop_datapath(efx
);
1804 static void efx_remove_all(struct efx_nic
*efx
)
1806 efx_remove_channels(efx
);
1807 efx_remove_filters(efx
);
1808 efx_remove_port(efx
);
1809 efx_remove_nic(efx
);
1812 /**************************************************************************
1814 * Interrupt moderation
1816 **************************************************************************/
1818 static unsigned int irq_mod_ticks(unsigned int usecs
, unsigned int quantum_ns
)
1822 if (usecs
* 1000 < quantum_ns
)
1823 return 1; /* never round down to 0 */
1824 return usecs
* 1000 / quantum_ns
;
1827 /* Set interrupt moderation parameters */
1828 int efx_init_irq_moderation(struct efx_nic
*efx
, unsigned int tx_usecs
,
1829 unsigned int rx_usecs
, bool rx_adaptive
,
1830 bool rx_may_override_tx
)
1832 struct efx_channel
*channel
;
1833 unsigned int irq_mod_max
= DIV_ROUND_UP(efx
->type
->timer_period_max
*
1834 efx
->timer_quantum_ns
,
1836 unsigned int tx_ticks
;
1837 unsigned int rx_ticks
;
1839 EFX_ASSERT_RESET_SERIALISED(efx
);
1841 if (tx_usecs
> irq_mod_max
|| rx_usecs
> irq_mod_max
)
1844 tx_ticks
= irq_mod_ticks(tx_usecs
, efx
->timer_quantum_ns
);
1845 rx_ticks
= irq_mod_ticks(rx_usecs
, efx
->timer_quantum_ns
);
1847 if (tx_ticks
!= rx_ticks
&& efx
->tx_channel_offset
== 0 &&
1848 !rx_may_override_tx
) {
1849 netif_err(efx
, drv
, efx
->net_dev
, "Channels are shared. "
1850 "RX and TX IRQ moderation must be equal\n");
1854 efx
->irq_rx_adaptive
= rx_adaptive
;
1855 efx
->irq_rx_moderation
= rx_ticks
;
1856 efx_for_each_channel(channel
, efx
) {
1857 if (efx_channel_has_rx_queue(channel
))
1858 channel
->irq_moderation
= rx_ticks
;
1859 else if (efx_channel_has_tx_queues(channel
))
1860 channel
->irq_moderation
= tx_ticks
;
1866 void efx_get_irq_moderation(struct efx_nic
*efx
, unsigned int *tx_usecs
,
1867 unsigned int *rx_usecs
, bool *rx_adaptive
)
1869 /* We must round up when converting ticks to microseconds
1870 * because we round down when converting the other way.
1873 *rx_adaptive
= efx
->irq_rx_adaptive
;
1874 *rx_usecs
= DIV_ROUND_UP(efx
->irq_rx_moderation
*
1875 efx
->timer_quantum_ns
,
1878 /* If channels are shared between RX and TX, so is IRQ
1879 * moderation. Otherwise, IRQ moderation is the same for all
1880 * TX channels and is not adaptive.
1882 if (efx
->tx_channel_offset
== 0)
1883 *tx_usecs
= *rx_usecs
;
1885 *tx_usecs
= DIV_ROUND_UP(
1886 efx
->channel
[efx
->tx_channel_offset
]->irq_moderation
*
1887 efx
->timer_quantum_ns
,
1891 /**************************************************************************
1895 **************************************************************************/
1897 /* Run periodically off the general workqueue */
1898 static void efx_monitor(struct work_struct
*data
)
1900 struct efx_nic
*efx
= container_of(data
, struct efx_nic
,
1903 netif_vdbg(efx
, timer
, efx
->net_dev
,
1904 "hardware monitor executing on CPU %d\n",
1905 raw_smp_processor_id());
1906 BUG_ON(efx
->type
->monitor
== NULL
);
1908 /* If the mac_lock is already held then it is likely a port
1909 * reconfiguration is already in place, which will likely do
1910 * most of the work of monitor() anyway. */
1911 if (mutex_trylock(&efx
->mac_lock
)) {
1912 if (efx
->port_enabled
)
1913 efx
->type
->monitor(efx
);
1914 mutex_unlock(&efx
->mac_lock
);
1917 queue_delayed_work(efx
->workqueue
, &efx
->monitor_work
,
1918 efx_monitor_interval
);
1921 /**************************************************************************
1925 *************************************************************************/
1928 * Context: process, rtnl_lock() held.
1930 static int efx_ioctl(struct net_device
*net_dev
, struct ifreq
*ifr
, int cmd
)
1932 struct efx_nic
*efx
= netdev_priv(net_dev
);
1933 struct mii_ioctl_data
*data
= if_mii(ifr
);
1935 if (cmd
== SIOCSHWTSTAMP
)
1936 return efx_ptp_set_ts_config(efx
, ifr
);
1937 if (cmd
== SIOCGHWTSTAMP
)
1938 return efx_ptp_get_ts_config(efx
, ifr
);
1940 /* Convert phy_id from older PRTAD/DEVAD format */
1941 if ((cmd
== SIOCGMIIREG
|| cmd
== SIOCSMIIREG
) &&
1942 (data
->phy_id
& 0xfc00) == 0x0400)
1943 data
->phy_id
^= MDIO_PHY_ID_C45
| 0x0400;
1945 return mdio_mii_ioctl(&efx
->mdio
, data
, cmd
);
1948 /**************************************************************************
1952 **************************************************************************/
1954 static void efx_init_napi_channel(struct efx_channel
*channel
)
1956 struct efx_nic
*efx
= channel
->efx
;
1958 channel
->napi_dev
= efx
->net_dev
;
1959 netif_napi_add(channel
->napi_dev
, &channel
->napi_str
,
1960 efx_poll
, napi_weight
);
1963 static void efx_init_napi(struct efx_nic
*efx
)
1965 struct efx_channel
*channel
;
1967 efx_for_each_channel(channel
, efx
)
1968 efx_init_napi_channel(channel
);
1971 static void efx_fini_napi_channel(struct efx_channel
*channel
)
1973 if (channel
->napi_dev
)
1974 netif_napi_del(&channel
->napi_str
);
1975 channel
->napi_dev
= NULL
;
1978 static void efx_fini_napi(struct efx_nic
*efx
)
1980 struct efx_channel
*channel
;
1982 efx_for_each_channel(channel
, efx
)
1983 efx_fini_napi_channel(channel
);
1986 /**************************************************************************
1988 * Kernel netpoll interface
1990 *************************************************************************/
1992 #ifdef CONFIG_NET_POLL_CONTROLLER
1994 /* Although in the common case interrupts will be disabled, this is not
1995 * guaranteed. However, all our work happens inside the NAPI callback,
1996 * so no locking is required.
1998 static void efx_netpoll(struct net_device
*net_dev
)
2000 struct efx_nic
*efx
= netdev_priv(net_dev
);
2001 struct efx_channel
*channel
;
2003 efx_for_each_channel(channel
, efx
)
2004 efx_schedule_channel(channel
);
2009 /**************************************************************************
2011 * Kernel net device interface
2013 *************************************************************************/
2015 /* Context: process, rtnl_lock() held. */
2016 static int efx_net_open(struct net_device
*net_dev
)
2018 struct efx_nic
*efx
= netdev_priv(net_dev
);
2021 netif_dbg(efx
, ifup
, efx
->net_dev
, "opening device on CPU %d\n",
2022 raw_smp_processor_id());
2024 rc
= efx_check_disabled(efx
);
2027 if (efx
->phy_mode
& PHY_MODE_SPECIAL
)
2029 if (efx_mcdi_poll_reboot(efx
) && efx_reset(efx
, RESET_TYPE_ALL
))
2032 /* Notify the kernel of the link state polled during driver load,
2033 * before the monitor starts running */
2034 efx_link_status_changed(efx
);
2037 efx_selftest_async_start(efx
);
2041 /* Context: process, rtnl_lock() held.
2042 * Note that the kernel will ignore our return code; this method
2043 * should really be a void.
2045 static int efx_net_stop(struct net_device
*net_dev
)
2047 struct efx_nic
*efx
= netdev_priv(net_dev
);
2049 netif_dbg(efx
, ifdown
, efx
->net_dev
, "closing on CPU %d\n",
2050 raw_smp_processor_id());
2052 /* Stop the device and flush all the channels */
2058 /* Context: process, dev_base_lock or RTNL held, non-blocking. */
2059 static struct rtnl_link_stats64
*efx_net_stats(struct net_device
*net_dev
,
2060 struct rtnl_link_stats64
*stats
)
2062 struct efx_nic
*efx
= netdev_priv(net_dev
);
2064 spin_lock_bh(&efx
->stats_lock
);
2065 efx
->type
->update_stats(efx
, NULL
, stats
);
2066 spin_unlock_bh(&efx
->stats_lock
);
2071 /* Context: netif_tx_lock held, BHs disabled. */
2072 static void efx_watchdog(struct net_device
*net_dev
)
2074 struct efx_nic
*efx
= netdev_priv(net_dev
);
2076 netif_err(efx
, tx_err
, efx
->net_dev
,
2077 "TX stuck with port_enabled=%d: resetting channels\n",
2080 efx_schedule_reset(efx
, RESET_TYPE_TX_WATCHDOG
);
2084 /* Context: process, rtnl_lock() held. */
2085 static int efx_change_mtu(struct net_device
*net_dev
, int new_mtu
)
2087 struct efx_nic
*efx
= netdev_priv(net_dev
);
2090 rc
= efx_check_disabled(efx
);
2093 if (new_mtu
> EFX_MAX_MTU
)
2096 netif_dbg(efx
, drv
, efx
->net_dev
, "changing MTU to %d\n", new_mtu
);
2098 efx_device_detach_sync(efx
);
2101 mutex_lock(&efx
->mac_lock
);
2102 net_dev
->mtu
= new_mtu
;
2103 efx
->type
->reconfigure_mac(efx
);
2104 mutex_unlock(&efx
->mac_lock
);
2107 netif_device_attach(efx
->net_dev
);
2111 static int efx_set_mac_address(struct net_device
*net_dev
, void *data
)
2113 struct efx_nic
*efx
= netdev_priv(net_dev
);
2114 struct sockaddr
*addr
= data
;
2115 u8
*new_addr
= addr
->sa_data
;
2117 if (!is_valid_ether_addr(new_addr
)) {
2118 netif_err(efx
, drv
, efx
->net_dev
,
2119 "invalid ethernet MAC address requested: %pM\n",
2121 return -EADDRNOTAVAIL
;
2124 ether_addr_copy(net_dev
->dev_addr
, new_addr
);
2125 efx_sriov_mac_address_changed(efx
);
2127 /* Reconfigure the MAC */
2128 mutex_lock(&efx
->mac_lock
);
2129 efx
->type
->reconfigure_mac(efx
);
2130 mutex_unlock(&efx
->mac_lock
);
2135 /* Context: netif_addr_lock held, BHs disabled. */
2136 static void efx_set_rx_mode(struct net_device
*net_dev
)
2138 struct efx_nic
*efx
= netdev_priv(net_dev
);
2140 if (efx
->port_enabled
)
2141 queue_work(efx
->workqueue
, &efx
->mac_work
);
2142 /* Otherwise efx_start_port() will do this */
2145 static int efx_set_features(struct net_device
*net_dev
, netdev_features_t data
)
2147 struct efx_nic
*efx
= netdev_priv(net_dev
);
2149 /* If disabling RX n-tuple filtering, clear existing filters */
2150 if (net_dev
->features
& ~data
& NETIF_F_NTUPLE
)
2151 return efx
->type
->filter_clear_rx(efx
, EFX_FILTER_PRI_MANUAL
);
2156 static const struct net_device_ops efx_farch_netdev_ops
= {
2157 .ndo_open
= efx_net_open
,
2158 .ndo_stop
= efx_net_stop
,
2159 .ndo_get_stats64
= efx_net_stats
,
2160 .ndo_tx_timeout
= efx_watchdog
,
2161 .ndo_start_xmit
= efx_hard_start_xmit
,
2162 .ndo_validate_addr
= eth_validate_addr
,
2163 .ndo_do_ioctl
= efx_ioctl
,
2164 .ndo_change_mtu
= efx_change_mtu
,
2165 .ndo_set_mac_address
= efx_set_mac_address
,
2166 .ndo_set_rx_mode
= efx_set_rx_mode
,
2167 .ndo_set_features
= efx_set_features
,
2168 #ifdef CONFIG_SFC_SRIOV
2169 .ndo_set_vf_mac
= efx_sriov_set_vf_mac
,
2170 .ndo_set_vf_vlan
= efx_sriov_set_vf_vlan
,
2171 .ndo_set_vf_spoofchk
= efx_sriov_set_vf_spoofchk
,
2172 .ndo_get_vf_config
= efx_sriov_get_vf_config
,
2174 #ifdef CONFIG_NET_POLL_CONTROLLER
2175 .ndo_poll_controller
= efx_netpoll
,
2177 .ndo_setup_tc
= efx_setup_tc
,
2178 #ifdef CONFIG_RFS_ACCEL
2179 .ndo_rx_flow_steer
= efx_filter_rfs
,
2183 static const struct net_device_ops efx_ef10_netdev_ops
= {
2184 .ndo_open
= efx_net_open
,
2185 .ndo_stop
= efx_net_stop
,
2186 .ndo_get_stats64
= efx_net_stats
,
2187 .ndo_tx_timeout
= efx_watchdog
,
2188 .ndo_start_xmit
= efx_hard_start_xmit
,
2189 .ndo_validate_addr
= eth_validate_addr
,
2190 .ndo_do_ioctl
= efx_ioctl
,
2191 .ndo_change_mtu
= efx_change_mtu
,
2192 .ndo_set_mac_address
= efx_set_mac_address
,
2193 .ndo_set_rx_mode
= efx_set_rx_mode
,
2194 .ndo_set_features
= efx_set_features
,
2195 #ifdef CONFIG_NET_POLL_CONTROLLER
2196 .ndo_poll_controller
= efx_netpoll
,
2198 #ifdef CONFIG_RFS_ACCEL
2199 .ndo_rx_flow_steer
= efx_filter_rfs
,
2203 static void efx_update_name(struct efx_nic
*efx
)
2205 strcpy(efx
->name
, efx
->net_dev
->name
);
2206 efx_mtd_rename(efx
);
2207 efx_set_channel_names(efx
);
2210 static int efx_netdev_event(struct notifier_block
*this,
2211 unsigned long event
, void *ptr
)
2213 struct net_device
*net_dev
= netdev_notifier_info_to_dev(ptr
);
2215 if ((net_dev
->netdev_ops
== &efx_farch_netdev_ops
||
2216 net_dev
->netdev_ops
== &efx_ef10_netdev_ops
) &&
2217 event
== NETDEV_CHANGENAME
)
2218 efx_update_name(netdev_priv(net_dev
));
2223 static struct notifier_block efx_netdev_notifier
= {
2224 .notifier_call
= efx_netdev_event
,
2228 show_phy_type(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
2230 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
2231 return sprintf(buf
, "%d\n", efx
->phy_type
);
2233 static DEVICE_ATTR(phy_type
, 0444, show_phy_type
, NULL
);
2235 static int efx_register_netdev(struct efx_nic
*efx
)
2237 struct net_device
*net_dev
= efx
->net_dev
;
2238 struct efx_channel
*channel
;
2241 net_dev
->watchdog_timeo
= 5 * HZ
;
2242 net_dev
->irq
= efx
->pci_dev
->irq
;
2243 if (efx_nic_rev(efx
) >= EFX_REV_HUNT_A0
) {
2244 net_dev
->netdev_ops
= &efx_ef10_netdev_ops
;
2245 net_dev
->priv_flags
|= IFF_UNICAST_FLT
;
2247 net_dev
->netdev_ops
= &efx_farch_netdev_ops
;
2249 SET_ETHTOOL_OPS(net_dev
, &efx_ethtool_ops
);
2250 net_dev
->gso_max_segs
= EFX_TSO_MAX_SEGS
;
2254 /* Enable resets to be scheduled and check whether any were
2255 * already requested. If so, the NIC is probably hosed so we
2258 efx
->state
= STATE_READY
;
2259 smp_mb(); /* ensure we change state before checking reset_pending */
2260 if (efx
->reset_pending
) {
2261 netif_err(efx
, probe
, efx
->net_dev
,
2262 "aborting probe due to scheduled reset\n");
2267 rc
= dev_alloc_name(net_dev
, net_dev
->name
);
2270 efx_update_name(efx
);
2272 /* Always start with carrier off; PHY events will detect the link */
2273 netif_carrier_off(net_dev
);
2275 rc
= register_netdevice(net_dev
);
2279 efx_for_each_channel(channel
, efx
) {
2280 struct efx_tx_queue
*tx_queue
;
2281 efx_for_each_channel_tx_queue(tx_queue
, channel
)
2282 efx_init_tx_queue_core_txq(tx_queue
);
2289 rc
= device_create_file(&efx
->pci_dev
->dev
, &dev_attr_phy_type
);
2291 netif_err(efx
, drv
, efx
->net_dev
,
2292 "failed to init net dev attributes\n");
2293 goto fail_registered
;
2300 efx_dissociate(efx
);
2301 unregister_netdevice(net_dev
);
2303 efx
->state
= STATE_UNINIT
;
2305 netif_err(efx
, drv
, efx
->net_dev
, "could not register net dev\n");
2309 static void efx_unregister_netdev(struct efx_nic
*efx
)
2314 BUG_ON(netdev_priv(efx
->net_dev
) != efx
);
2316 strlcpy(efx
->name
, pci_name(efx
->pci_dev
), sizeof(efx
->name
));
2317 device_remove_file(&efx
->pci_dev
->dev
, &dev_attr_phy_type
);
2320 unregister_netdevice(efx
->net_dev
);
2321 efx
->state
= STATE_UNINIT
;
2325 /**************************************************************************
2327 * Device reset and suspend
2329 **************************************************************************/
2331 /* Tears down the entire software state and most of the hardware state
2333 void efx_reset_down(struct efx_nic
*efx
, enum reset_type method
)
2335 EFX_ASSERT_RESET_SERIALISED(efx
);
2338 efx_disable_interrupts(efx
);
2340 mutex_lock(&efx
->mac_lock
);
2341 if (efx
->port_initialized
&& method
!= RESET_TYPE_INVISIBLE
)
2342 efx
->phy_op
->fini(efx
);
2343 efx
->type
->fini(efx
);
2346 /* This function will always ensure that the locks acquired in
2347 * efx_reset_down() are released. A failure return code indicates
2348 * that we were unable to reinitialise the hardware, and the
2349 * driver should be disabled. If ok is false, then the rx and tx
2350 * engines are not restarted, pending a RESET_DISABLE. */
2351 int efx_reset_up(struct efx_nic
*efx
, enum reset_type method
, bool ok
)
2355 EFX_ASSERT_RESET_SERIALISED(efx
);
2357 rc
= efx
->type
->init(efx
);
2359 netif_err(efx
, drv
, efx
->net_dev
, "failed to initialise NIC\n");
2366 if (efx
->port_initialized
&& method
!= RESET_TYPE_INVISIBLE
) {
2367 rc
= efx
->phy_op
->init(efx
);
2370 if (efx
->phy_op
->reconfigure(efx
))
2371 netif_err(efx
, drv
, efx
->net_dev
,
2372 "could not restore PHY settings\n");
2375 rc
= efx_enable_interrupts(efx
);
2378 efx_restore_filters(efx
);
2379 efx_sriov_reset(efx
);
2381 mutex_unlock(&efx
->mac_lock
);
2388 efx
->port_initialized
= false;
2390 mutex_unlock(&efx
->mac_lock
);
2395 /* Reset the NIC using the specified method. Note that the reset may
2396 * fail, in which case the card will be left in an unusable state.
2398 * Caller must hold the rtnl_lock.
2400 int efx_reset(struct efx_nic
*efx
, enum reset_type method
)
2405 netif_info(efx
, drv
, efx
->net_dev
, "resetting (%s)\n",
2406 RESET_TYPE(method
));
2408 efx_device_detach_sync(efx
);
2409 efx_reset_down(efx
, method
);
2411 rc
= efx
->type
->reset(efx
, method
);
2413 netif_err(efx
, drv
, efx
->net_dev
, "failed to reset hardware\n");
2417 /* Clear flags for the scopes we covered. We assume the NIC and
2418 * driver are now quiescent so that there is no race here.
2420 efx
->reset_pending
&= -(1 << (method
+ 1));
2422 /* Reinitialise bus-mastering, which may have been turned off before
2423 * the reset was scheduled. This is still appropriate, even in the
2424 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
2425 * can respond to requests. */
2426 pci_set_master(efx
->pci_dev
);
2429 /* Leave device stopped if necessary */
2431 method
== RESET_TYPE_DISABLE
||
2432 method
== RESET_TYPE_RECOVER_OR_DISABLE
;
2433 rc2
= efx_reset_up(efx
, method
, !disabled
);
2441 dev_close(efx
->net_dev
);
2442 netif_err(efx
, drv
, efx
->net_dev
, "has been disabled\n");
2443 efx
->state
= STATE_DISABLED
;
2445 netif_dbg(efx
, drv
, efx
->net_dev
, "reset complete\n");
2446 netif_device_attach(efx
->net_dev
);
2451 /* Try recovery mechanisms.
2452 * For now only EEH is supported.
2453 * Returns 0 if the recovery mechanisms are unsuccessful.
2454 * Returns a non-zero value otherwise.
2456 int efx_try_recovery(struct efx_nic
*efx
)
2459 /* A PCI error can occur and not be seen by EEH because nothing
2460 * happens on the PCI bus. In this case the driver may fail and
2461 * schedule a 'recover or reset', leading to this recovery handler.
2462 * Manually call the eeh failure check function.
2464 struct eeh_dev
*eehdev
=
2465 of_node_to_eeh_dev(pci_device_to_OF_node(efx
->pci_dev
));
2467 if (eeh_dev_check_failure(eehdev
)) {
2468 /* The EEH mechanisms will handle the error and reset the
2469 * device if necessary.
2477 static void efx_wait_for_bist_end(struct efx_nic
*efx
)
2481 for (i
= 0; i
< BIST_WAIT_DELAY_COUNT
; ++i
) {
2482 if (efx_mcdi_poll_reboot(efx
))
2484 msleep(BIST_WAIT_DELAY_MS
);
2487 netif_err(efx
, drv
, efx
->net_dev
, "Warning: No MC reboot after BIST mode\n");
2489 /* Either way unset the BIST flag. If we found no reboot we probably
2490 * won't recover, but we should try.
2492 efx
->mc_bist_for_other_fn
= false;
2495 /* The worker thread exists so that code that cannot sleep can
2496 * schedule a reset for later.
2498 static void efx_reset_work(struct work_struct
*data
)
2500 struct efx_nic
*efx
= container_of(data
, struct efx_nic
, reset_work
);
2501 unsigned long pending
;
2502 enum reset_type method
;
2504 pending
= ACCESS_ONCE(efx
->reset_pending
);
2505 method
= fls(pending
) - 1;
2507 if (method
== RESET_TYPE_MC_BIST
)
2508 efx_wait_for_bist_end(efx
);
2510 if ((method
== RESET_TYPE_RECOVER_OR_DISABLE
||
2511 method
== RESET_TYPE_RECOVER_OR_ALL
) &&
2512 efx_try_recovery(efx
))
2520 /* We checked the state in efx_schedule_reset() but it may
2521 * have changed by now. Now that we have the RTNL lock,
2522 * it cannot change again.
2524 if (efx
->state
== STATE_READY
)
2525 (void)efx_reset(efx
, method
);
2530 void efx_schedule_reset(struct efx_nic
*efx
, enum reset_type type
)
2532 enum reset_type method
;
2534 if (efx
->state
== STATE_RECOVERY
) {
2535 netif_dbg(efx
, drv
, efx
->net_dev
,
2536 "recovering: skip scheduling %s reset\n",
2542 case RESET_TYPE_INVISIBLE
:
2543 case RESET_TYPE_ALL
:
2544 case RESET_TYPE_RECOVER_OR_ALL
:
2545 case RESET_TYPE_WORLD
:
2546 case RESET_TYPE_DISABLE
:
2547 case RESET_TYPE_RECOVER_OR_DISABLE
:
2548 case RESET_TYPE_MC_BIST
:
2550 netif_dbg(efx
, drv
, efx
->net_dev
, "scheduling %s reset\n",
2551 RESET_TYPE(method
));
2554 method
= efx
->type
->map_reset_reason(type
);
2555 netif_dbg(efx
, drv
, efx
->net_dev
,
2556 "scheduling %s reset for %s\n",
2557 RESET_TYPE(method
), RESET_TYPE(type
));
2561 set_bit(method
, &efx
->reset_pending
);
2562 smp_mb(); /* ensure we change reset_pending before checking state */
2564 /* If we're not READY then just leave the flags set as the cue
2565 * to abort probing or reschedule the reset later.
2567 if (ACCESS_ONCE(efx
->state
) != STATE_READY
)
2570 /* efx_process_channel() will no longer read events once a
2571 * reset is scheduled. So switch back to poll'd MCDI completions. */
2572 efx_mcdi_mode_poll(efx
);
2574 queue_work(reset_workqueue
, &efx
->reset_work
);
2577 /**************************************************************************
2579 * List of NICs we support
2581 **************************************************************************/
2583 /* PCI device ID table */
2584 static DEFINE_PCI_DEVICE_TABLE(efx_pci_table
) = {
2585 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
,
2586 PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0
),
2587 .driver_data
= (unsigned long) &falcon_a1_nic_type
},
2588 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
,
2589 PCI_DEVICE_ID_SOLARFLARE_SFC4000B
),
2590 .driver_data
= (unsigned long) &falcon_b0_nic_type
},
2591 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0803), /* SFC9020 */
2592 .driver_data
= (unsigned long) &siena_a0_nic_type
},
2593 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0813), /* SFL9021 */
2594 .driver_data
= (unsigned long) &siena_a0_nic_type
},
2595 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0903), /* SFC9120 PF */
2596 .driver_data
= (unsigned long) &efx_hunt_a0_nic_type
},
2597 {0} /* end of list */
2600 /**************************************************************************
2602 * Dummy PHY/MAC operations
2604 * Can be used for some unimplemented operations
2605 * Needed so all function pointers are valid and do not have to be tested
2608 **************************************************************************/
2609 int efx_port_dummy_op_int(struct efx_nic
*efx
)
2613 void efx_port_dummy_op_void(struct efx_nic
*efx
) {}
2615 static bool efx_port_dummy_op_poll(struct efx_nic
*efx
)
2620 static const struct efx_phy_operations efx_dummy_phy_operations
= {
2621 .init
= efx_port_dummy_op_int
,
2622 .reconfigure
= efx_port_dummy_op_int
,
2623 .poll
= efx_port_dummy_op_poll
,
2624 .fini
= efx_port_dummy_op_void
,
2627 /**************************************************************************
2631 **************************************************************************/
2633 /* This zeroes out and then fills in the invariants in a struct
2634 * efx_nic (including all sub-structures).
2636 static int efx_init_struct(struct efx_nic
*efx
,
2637 struct pci_dev
*pci_dev
, struct net_device
*net_dev
)
2641 /* Initialise common structures */
2642 INIT_LIST_HEAD(&efx
->node
);
2643 INIT_LIST_HEAD(&efx
->secondary_list
);
2644 spin_lock_init(&efx
->biu_lock
);
2645 #ifdef CONFIG_SFC_MTD
2646 INIT_LIST_HEAD(&efx
->mtd_list
);
2648 INIT_WORK(&efx
->reset_work
, efx_reset_work
);
2649 INIT_DELAYED_WORK(&efx
->monitor_work
, efx_monitor
);
2650 INIT_DELAYED_WORK(&efx
->selftest_work
, efx_selftest_async_work
);
2651 efx
->pci_dev
= pci_dev
;
2652 efx
->msg_enable
= debug
;
2653 efx
->state
= STATE_UNINIT
;
2654 strlcpy(efx
->name
, pci_name(pci_dev
), sizeof(efx
->name
));
2656 efx
->net_dev
= net_dev
;
2657 efx
->rx_prefix_size
= efx
->type
->rx_prefix_size
;
2659 NET_IP_ALIGN
? (efx
->rx_prefix_size
+ NET_IP_ALIGN
) % 4 : 0;
2660 efx
->rx_packet_hash_offset
=
2661 efx
->type
->rx_hash_offset
- efx
->type
->rx_prefix_size
;
2662 efx
->rx_packet_ts_offset
=
2663 efx
->type
->rx_ts_offset
- efx
->type
->rx_prefix_size
;
2664 spin_lock_init(&efx
->stats_lock
);
2665 mutex_init(&efx
->mac_lock
);
2666 efx
->phy_op
= &efx_dummy_phy_operations
;
2667 efx
->mdio
.dev
= net_dev
;
2668 INIT_WORK(&efx
->mac_work
, efx_mac_work
);
2669 init_waitqueue_head(&efx
->flush_wq
);
2671 for (i
= 0; i
< EFX_MAX_CHANNELS
; i
++) {
2672 efx
->channel
[i
] = efx_alloc_channel(efx
, i
, NULL
);
2673 if (!efx
->channel
[i
])
2675 efx
->msi_context
[i
].efx
= efx
;
2676 efx
->msi_context
[i
].index
= i
;
2679 /* Higher numbered interrupt modes are less capable! */
2680 efx
->interrupt_mode
= max(efx
->type
->max_interrupt_mode
,
2683 /* Would be good to use the net_dev name, but we're too early */
2684 snprintf(efx
->workqueue_name
, sizeof(efx
->workqueue_name
), "sfc%s",
2686 efx
->workqueue
= create_singlethread_workqueue(efx
->workqueue_name
);
2687 if (!efx
->workqueue
)
2693 efx_fini_struct(efx
);
2697 static void efx_fini_struct(struct efx_nic
*efx
)
2701 for (i
= 0; i
< EFX_MAX_CHANNELS
; i
++)
2702 kfree(efx
->channel
[i
]);
2706 if (efx
->workqueue
) {
2707 destroy_workqueue(efx
->workqueue
);
2708 efx
->workqueue
= NULL
;
2712 /**************************************************************************
2716 **************************************************************************/
2718 /* Main body of final NIC shutdown code
2719 * This is called only at module unload (or hotplug removal).
2721 static void efx_pci_remove_main(struct efx_nic
*efx
)
2723 /* Flush reset_work. It can no longer be scheduled since we
2726 BUG_ON(efx
->state
== STATE_READY
);
2727 cancel_work_sync(&efx
->reset_work
);
2729 efx_disable_interrupts(efx
);
2730 efx_nic_fini_interrupt(efx
);
2732 efx
->type
->fini(efx
);
2734 efx_remove_all(efx
);
2737 /* Final NIC shutdown
2738 * This is called only at module unload (or hotplug removal).
2740 static void efx_pci_remove(struct pci_dev
*pci_dev
)
2742 struct efx_nic
*efx
;
2744 efx
= pci_get_drvdata(pci_dev
);
2748 /* Mark the NIC as fini, then stop the interface */
2750 efx_dissociate(efx
);
2751 dev_close(efx
->net_dev
);
2752 efx_disable_interrupts(efx
);
2755 efx_sriov_fini(efx
);
2756 efx_unregister_netdev(efx
);
2758 efx_mtd_remove(efx
);
2760 efx_pci_remove_main(efx
);
2763 netif_dbg(efx
, drv
, efx
->net_dev
, "shutdown successful\n");
2765 efx_fini_struct(efx
);
2766 free_netdev(efx
->net_dev
);
2768 pci_disable_pcie_error_reporting(pci_dev
);
2771 /* NIC VPD information
2772 * Called during probe to display the part number of the
2773 * installed NIC. VPD is potentially very large but this should
2774 * always appear within the first 512 bytes.
2776 #define SFC_VPD_LEN 512
2777 static void efx_probe_vpd_strings(struct efx_nic
*efx
)
2779 struct pci_dev
*dev
= efx
->pci_dev
;
2780 char vpd_data
[SFC_VPD_LEN
];
2782 int ro_start
, ro_size
, i
, j
;
2784 /* Get the vpd data from the device */
2785 vpd_size
= pci_read_vpd(dev
, 0, sizeof(vpd_data
), vpd_data
);
2786 if (vpd_size
<= 0) {
2787 netif_err(efx
, drv
, efx
->net_dev
, "Unable to read VPD\n");
2791 /* Get the Read only section */
2792 ro_start
= pci_vpd_find_tag(vpd_data
, 0, vpd_size
, PCI_VPD_LRDT_RO_DATA
);
2794 netif_err(efx
, drv
, efx
->net_dev
, "VPD Read-only not found\n");
2798 ro_size
= pci_vpd_lrdt_size(&vpd_data
[ro_start
]);
2800 i
= ro_start
+ PCI_VPD_LRDT_TAG_SIZE
;
2801 if (i
+ j
> vpd_size
)
2804 /* Get the Part number */
2805 i
= pci_vpd_find_info_keyword(vpd_data
, i
, j
, "PN");
2807 netif_err(efx
, drv
, efx
->net_dev
, "Part number not found\n");
2811 j
= pci_vpd_info_field_size(&vpd_data
[i
]);
2812 i
+= PCI_VPD_INFO_FLD_HDR_SIZE
;
2813 if (i
+ j
> vpd_size
) {
2814 netif_err(efx
, drv
, efx
->net_dev
, "Incomplete part number\n");
2818 netif_info(efx
, drv
, efx
->net_dev
,
2819 "Part Number : %.*s\n", j
, &vpd_data
[i
]);
2821 i
= ro_start
+ PCI_VPD_LRDT_TAG_SIZE
;
2823 i
= pci_vpd_find_info_keyword(vpd_data
, i
, j
, "SN");
2825 netif_err(efx
, drv
, efx
->net_dev
, "Serial number not found\n");
2829 j
= pci_vpd_info_field_size(&vpd_data
[i
]);
2830 i
+= PCI_VPD_INFO_FLD_HDR_SIZE
;
2831 if (i
+ j
> vpd_size
) {
2832 netif_err(efx
, drv
, efx
->net_dev
, "Incomplete serial number\n");
2836 efx
->vpd_sn
= kmalloc(j
+ 1, GFP_KERNEL
);
2840 snprintf(efx
->vpd_sn
, j
+ 1, "%s", &vpd_data
[i
]);
2844 /* Main body of NIC initialisation
2845 * This is called at module load (or hotplug insertion, theoretically).
2847 static int efx_pci_probe_main(struct efx_nic
*efx
)
2851 /* Do start-of-day initialisation */
2852 rc
= efx_probe_all(efx
);
2858 rc
= efx
->type
->init(efx
);
2860 netif_err(efx
, probe
, efx
->net_dev
,
2861 "failed to initialise NIC\n");
2865 rc
= efx_init_port(efx
);
2867 netif_err(efx
, probe
, efx
->net_dev
,
2868 "failed to initialise port\n");
2872 rc
= efx_nic_init_interrupt(efx
);
2875 rc
= efx_enable_interrupts(efx
);
2882 efx_nic_fini_interrupt(efx
);
2886 efx
->type
->fini(efx
);
2889 efx_remove_all(efx
);
2894 /* NIC initialisation
2896 * This is called at module load (or hotplug insertion,
2897 * theoretically). It sets up PCI mappings, resets the NIC,
2898 * sets up and registers the network devices with the kernel and hooks
2899 * the interrupt service routine. It does not prepare the device for
2900 * transmission; this is left to the first time one of the network
2901 * interfaces is brought up (i.e. efx_net_open).
2903 static int efx_pci_probe(struct pci_dev
*pci_dev
,
2904 const struct pci_device_id
*entry
)
2906 struct net_device
*net_dev
;
2907 struct efx_nic
*efx
;
2910 /* Allocate and initialise a struct net_device and struct efx_nic */
2911 net_dev
= alloc_etherdev_mqs(sizeof(*efx
), EFX_MAX_CORE_TX_QUEUES
,
2915 efx
= netdev_priv(net_dev
);
2916 efx
->type
= (const struct efx_nic_type
*) entry
->driver_data
;
2917 net_dev
->features
|= (efx
->type
->offload_features
| NETIF_F_SG
|
2918 NETIF_F_HIGHDMA
| NETIF_F_TSO
|
2920 if (efx
->type
->offload_features
& NETIF_F_V6_CSUM
)
2921 net_dev
->features
|= NETIF_F_TSO6
;
2922 /* Mask for features that also apply to VLAN devices */
2923 net_dev
->vlan_features
|= (NETIF_F_ALL_CSUM
| NETIF_F_SG
|
2924 NETIF_F_HIGHDMA
| NETIF_F_ALL_TSO
|
2926 /* All offloads can be toggled */
2927 net_dev
->hw_features
= net_dev
->features
& ~NETIF_F_HIGHDMA
;
2928 pci_set_drvdata(pci_dev
, efx
);
2929 SET_NETDEV_DEV(net_dev
, &pci_dev
->dev
);
2930 rc
= efx_init_struct(efx
, pci_dev
, net_dev
);
2934 netif_info(efx
, probe
, efx
->net_dev
,
2935 "Solarflare NIC detected\n");
2937 efx_probe_vpd_strings(efx
);
2939 /* Set up basic I/O (BAR mappings etc) */
2940 rc
= efx_init_io(efx
);
2944 rc
= efx_pci_probe_main(efx
);
2948 rc
= efx_register_netdev(efx
);
2952 rc
= efx_sriov_init(efx
);
2954 netif_err(efx
, probe
, efx
->net_dev
,
2955 "SR-IOV can't be enabled rc %d\n", rc
);
2957 netif_dbg(efx
, probe
, efx
->net_dev
, "initialisation successful\n");
2959 /* Try to create MTDs, but allow this to fail */
2961 rc
= efx_mtd_probe(efx
);
2964 netif_warn(efx
, probe
, efx
->net_dev
,
2965 "failed to create MTDs (%d)\n", rc
);
2967 rc
= pci_enable_pcie_error_reporting(pci_dev
);
2968 if (rc
&& rc
!= -EINVAL
)
2969 netif_warn(efx
, probe
, efx
->net_dev
,
2970 "pci_enable_pcie_error_reporting failed (%d)\n", rc
);
2975 efx_pci_remove_main(efx
);
2979 efx_fini_struct(efx
);
2982 netif_dbg(efx
, drv
, efx
->net_dev
, "initialisation failed. rc=%d\n", rc
);
2983 free_netdev(net_dev
);
2987 static int efx_pm_freeze(struct device
*dev
)
2989 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
2993 if (efx
->state
!= STATE_DISABLED
) {
2994 efx
->state
= STATE_UNINIT
;
2996 efx_device_detach_sync(efx
);
2999 efx_disable_interrupts(efx
);
3007 static int efx_pm_thaw(struct device
*dev
)
3010 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
3014 if (efx
->state
!= STATE_DISABLED
) {
3015 rc
= efx_enable_interrupts(efx
);
3019 mutex_lock(&efx
->mac_lock
);
3020 efx
->phy_op
->reconfigure(efx
);
3021 mutex_unlock(&efx
->mac_lock
);
3025 netif_device_attach(efx
->net_dev
);
3027 efx
->state
= STATE_READY
;
3029 efx
->type
->resume_wol(efx
);
3034 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
3035 queue_work(reset_workqueue
, &efx
->reset_work
);
3045 static int efx_pm_poweroff(struct device
*dev
)
3047 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
3048 struct efx_nic
*efx
= pci_get_drvdata(pci_dev
);
3050 efx
->type
->fini(efx
);
3052 efx
->reset_pending
= 0;
3054 pci_save_state(pci_dev
);
3055 return pci_set_power_state(pci_dev
, PCI_D3hot
);
3058 /* Used for both resume and restore */
3059 static int efx_pm_resume(struct device
*dev
)
3061 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
3062 struct efx_nic
*efx
= pci_get_drvdata(pci_dev
);
3065 rc
= pci_set_power_state(pci_dev
, PCI_D0
);
3068 pci_restore_state(pci_dev
);
3069 rc
= pci_enable_device(pci_dev
);
3072 pci_set_master(efx
->pci_dev
);
3073 rc
= efx
->type
->reset(efx
, RESET_TYPE_ALL
);
3076 rc
= efx
->type
->init(efx
);
3079 rc
= efx_pm_thaw(dev
);
3083 static int efx_pm_suspend(struct device
*dev
)
3088 rc
= efx_pm_poweroff(dev
);
3094 static const struct dev_pm_ops efx_pm_ops
= {
3095 .suspend
= efx_pm_suspend
,
3096 .resume
= efx_pm_resume
,
3097 .freeze
= efx_pm_freeze
,
3098 .thaw
= efx_pm_thaw
,
3099 .poweroff
= efx_pm_poweroff
,
3100 .restore
= efx_pm_resume
,
3103 /* A PCI error affecting this device was detected.
3104 * At this point MMIO and DMA may be disabled.
3105 * Stop the software path and request a slot reset.
3107 static pci_ers_result_t
efx_io_error_detected(struct pci_dev
*pdev
,
3108 enum pci_channel_state state
)
3110 pci_ers_result_t status
= PCI_ERS_RESULT_RECOVERED
;
3111 struct efx_nic
*efx
= pci_get_drvdata(pdev
);
3113 if (state
== pci_channel_io_perm_failure
)
3114 return PCI_ERS_RESULT_DISCONNECT
;
3118 if (efx
->state
!= STATE_DISABLED
) {
3119 efx
->state
= STATE_RECOVERY
;
3120 efx
->reset_pending
= 0;
3122 efx_device_detach_sync(efx
);
3125 efx_disable_interrupts(efx
);
3127 status
= PCI_ERS_RESULT_NEED_RESET
;
3129 /* If the interface is disabled we don't want to do anything
3132 status
= PCI_ERS_RESULT_RECOVERED
;
3137 pci_disable_device(pdev
);
3142 /* Fake a successfull reset, which will be performed later in efx_io_resume. */
3143 static pci_ers_result_t
efx_io_slot_reset(struct pci_dev
*pdev
)
3145 struct efx_nic
*efx
= pci_get_drvdata(pdev
);
3146 pci_ers_result_t status
= PCI_ERS_RESULT_RECOVERED
;
3149 if (pci_enable_device(pdev
)) {
3150 netif_err(efx
, hw
, efx
->net_dev
,
3151 "Cannot re-enable PCI device after reset.\n");
3152 status
= PCI_ERS_RESULT_DISCONNECT
;
3155 rc
= pci_cleanup_aer_uncorrect_error_status(pdev
);
3157 netif_err(efx
, hw
, efx
->net_dev
,
3158 "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc
);
3159 /* Non-fatal error. Continue. */
3165 /* Perform the actual reset and resume I/O operations. */
3166 static void efx_io_resume(struct pci_dev
*pdev
)
3168 struct efx_nic
*efx
= pci_get_drvdata(pdev
);
3173 if (efx
->state
== STATE_DISABLED
)
3176 rc
= efx_reset(efx
, RESET_TYPE_ALL
);
3178 netif_err(efx
, hw
, efx
->net_dev
,
3179 "efx_reset failed after PCI error (%d)\n", rc
);
3181 efx
->state
= STATE_READY
;
3182 netif_dbg(efx
, hw
, efx
->net_dev
,
3183 "Done resetting and resuming IO after PCI error.\n");
3190 /* For simplicity and reliability, we always require a slot reset and try to
3191 * reset the hardware when a pci error affecting the device is detected.
3192 * We leave both the link_reset and mmio_enabled callback unimplemented:
3193 * with our request for slot reset the mmio_enabled callback will never be
3194 * called, and the link_reset callback is not used by AER or EEH mechanisms.
3196 static struct pci_error_handlers efx_err_handlers
= {
3197 .error_detected
= efx_io_error_detected
,
3198 .slot_reset
= efx_io_slot_reset
,
3199 .resume
= efx_io_resume
,
3202 static struct pci_driver efx_pci_driver
= {
3203 .name
= KBUILD_MODNAME
,
3204 .id_table
= efx_pci_table
,
3205 .probe
= efx_pci_probe
,
3206 .remove
= efx_pci_remove
,
3207 .driver
.pm
= &efx_pm_ops
,
3208 .err_handler
= &efx_err_handlers
,
3211 /**************************************************************************
3213 * Kernel module interface
3215 *************************************************************************/
3217 module_param(interrupt_mode
, uint
, 0444);
3218 MODULE_PARM_DESC(interrupt_mode
,
3219 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
3221 static int __init
efx_init_module(void)
3225 printk(KERN_INFO
"Solarflare NET driver v" EFX_DRIVER_VERSION
"\n");
3227 rc
= register_netdevice_notifier(&efx_netdev_notifier
);
3231 rc
= efx_init_sriov();
3235 reset_workqueue
= create_singlethread_workqueue("sfc_reset");
3236 if (!reset_workqueue
) {
3241 rc
= pci_register_driver(&efx_pci_driver
);
3248 destroy_workqueue(reset_workqueue
);
3252 unregister_netdevice_notifier(&efx_netdev_notifier
);
3257 static void __exit
efx_exit_module(void)
3259 printk(KERN_INFO
"Solarflare NET driver unloading\n");
3261 pci_unregister_driver(&efx_pci_driver
);
3262 destroy_workqueue(reset_workqueue
);
3264 unregister_netdevice_notifier(&efx_netdev_notifier
);
3268 module_init(efx_init_module
);
3269 module_exit(efx_exit_module
);
3271 MODULE_AUTHOR("Solarflare Communications and "
3272 "Michael Brown <mbrown@fensystems.co.uk>");
3273 MODULE_DESCRIPTION("Solarflare network driver");
3274 MODULE_LICENSE("GPL");
3275 MODULE_DEVICE_TABLE(pci
, efx_pci_table
);