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_MC_BIST
] = "MC_BIST",
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_DMA_ERROR
] = "DMA_ERROR",
85 [RESET_TYPE_TX_SKIP
] = "TX_SKIP",
86 [RESET_TYPE_MC_FAILURE
] = "MC_FAILURE",
87 [RESET_TYPE_MCDI_TIMEOUT
] = "MCDI_TIMEOUT (FLR)",
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 /* How often and how many times to poll for a reset while waiting for a
97 * BIST that another function started to complete.
99 #define BIST_WAIT_DELAY_MS 100
100 #define BIST_WAIT_DELAY_COUNT 100
102 /**************************************************************************
104 * Configurable values
106 *************************************************************************/
109 * Use separate channels for TX and RX events
111 * Set this to 1 to use separate channels for TX and RX. It allows us
112 * to control interrupt affinity separately for TX and RX.
114 * This is only used in MSI-X interrupt mode
116 static bool separate_tx_channels
;
117 module_param(separate_tx_channels
, bool, 0444);
118 MODULE_PARM_DESC(separate_tx_channels
,
119 "Use separate channels for TX and RX");
121 /* This is the weight assigned to each of the (per-channel) virtual
124 static int napi_weight
= 64;
126 /* This is the time (in jiffies) between invocations of the hardware
128 * On Falcon-based NICs, this will:
129 * - Check the on-board hardware monitor;
130 * - Poll the link state and reconfigure the hardware as necessary.
131 * On Siena-based NICs for power systems with EEH support, this will give EEH a
134 static unsigned int efx_monitor_interval
= 1 * HZ
;
136 /* Initial interrupt moderation settings. They can be modified after
137 * module load with ethtool.
139 * The default for RX should strike a balance between increasing the
140 * round-trip latency and reducing overhead.
142 static unsigned int rx_irq_mod_usec
= 60;
144 /* Initial interrupt moderation settings. They can be modified after
145 * module load with ethtool.
147 * This default is chosen to ensure that a 10G link does not go idle
148 * while a TX queue is stopped after it has become full. A queue is
149 * restarted when it drops below half full. The time this takes (assuming
150 * worst case 3 descriptors per packet and 1024 descriptors) is
151 * 512 / 3 * 1.2 = 205 usec.
153 static unsigned int tx_irq_mod_usec
= 150;
155 /* This is the first interrupt mode to try out of:
160 static unsigned int interrupt_mode
;
162 /* This is the requested number of CPUs to use for Receive-Side Scaling (RSS),
163 * i.e. the number of CPUs among which we may distribute simultaneous
164 * interrupt handling.
166 * Cards without MSI-X will only target one CPU via legacy or MSI interrupt.
167 * The default (0) means to assign an interrupt to each core.
169 static unsigned int rss_cpus
;
170 module_param(rss_cpus
, uint
, 0444);
171 MODULE_PARM_DESC(rss_cpus
, "Number of CPUs to use for Receive-Side Scaling");
173 static bool phy_flash_cfg
;
174 module_param(phy_flash_cfg
, bool, 0644);
175 MODULE_PARM_DESC(phy_flash_cfg
, "Set PHYs into reflash mode initially");
177 static unsigned irq_adapt_low_thresh
= 8000;
178 module_param(irq_adapt_low_thresh
, uint
, 0644);
179 MODULE_PARM_DESC(irq_adapt_low_thresh
,
180 "Threshold score for reducing IRQ moderation");
182 static unsigned irq_adapt_high_thresh
= 16000;
183 module_param(irq_adapt_high_thresh
, uint
, 0644);
184 MODULE_PARM_DESC(irq_adapt_high_thresh
,
185 "Threshold score for increasing IRQ moderation");
187 static unsigned debug
= (NETIF_MSG_DRV
| NETIF_MSG_PROBE
|
188 NETIF_MSG_LINK
| NETIF_MSG_IFDOWN
|
189 NETIF_MSG_IFUP
| NETIF_MSG_RX_ERR
|
190 NETIF_MSG_TX_ERR
| NETIF_MSG_HW
);
191 module_param(debug
, uint
, 0);
192 MODULE_PARM_DESC(debug
, "Bitmapped debugging message enable value");
194 /**************************************************************************
196 * Utility functions and prototypes
198 *************************************************************************/
200 static int efx_soft_enable_interrupts(struct efx_nic
*efx
);
201 static void efx_soft_disable_interrupts(struct efx_nic
*efx
);
202 static void efx_remove_channel(struct efx_channel
*channel
);
203 static void efx_remove_channels(struct efx_nic
*efx
);
204 static const struct efx_channel_type efx_default_channel_type
;
205 static void efx_remove_port(struct efx_nic
*efx
);
206 static void efx_init_napi_channel(struct efx_channel
*channel
);
207 static void efx_fini_napi(struct efx_nic
*efx
);
208 static void efx_fini_napi_channel(struct efx_channel
*channel
);
209 static void efx_fini_struct(struct efx_nic
*efx
);
210 static void efx_start_all(struct efx_nic
*efx
);
211 static void efx_stop_all(struct efx_nic
*efx
);
213 #define EFX_ASSERT_RESET_SERIALISED(efx) \
215 if ((efx->state == STATE_READY) || \
216 (efx->state == STATE_RECOVERY) || \
217 (efx->state == STATE_DISABLED)) \
221 static int efx_check_disabled(struct efx_nic
*efx
)
223 if (efx
->state
== STATE_DISABLED
|| efx
->state
== STATE_RECOVERY
) {
224 netif_err(efx
, drv
, efx
->net_dev
,
225 "device is disabled due to earlier errors\n");
231 /**************************************************************************
233 * Event queue processing
235 *************************************************************************/
237 /* Process channel's event queue
239 * This function is responsible for processing the event queue of a
240 * single channel. The caller must guarantee that this function will
241 * never be concurrently called more than once on the same channel,
242 * though different channels may be being processed concurrently.
244 static int efx_process_channel(struct efx_channel
*channel
, int budget
)
248 if (unlikely(!channel
->enabled
))
251 spent
= efx_nic_process_eventq(channel
, budget
);
252 if (spent
&& efx_channel_has_rx_queue(channel
)) {
253 struct efx_rx_queue
*rx_queue
=
254 efx_channel_get_rx_queue(channel
);
256 efx_rx_flush_packet(channel
);
257 efx_fast_push_rx_descriptors(rx_queue
, true);
265 * NAPI guarantees serialisation of polls of the same device, which
266 * provides the guarantee required by efx_process_channel().
268 static int efx_poll(struct napi_struct
*napi
, int budget
)
270 struct efx_channel
*channel
=
271 container_of(napi
, struct efx_channel
, napi_str
);
272 struct efx_nic
*efx
= channel
->efx
;
275 if (!efx_channel_lock_napi(channel
))
278 netif_vdbg(efx
, intr
, efx
->net_dev
,
279 "channel %d NAPI poll executing on CPU %d\n",
280 channel
->channel
, raw_smp_processor_id());
282 spent
= efx_process_channel(channel
, budget
);
284 if (spent
< budget
) {
285 if (efx_channel_has_rx_queue(channel
) &&
286 efx
->irq_rx_adaptive
&&
287 unlikely(++channel
->irq_count
== 1000)) {
288 if (unlikely(channel
->irq_mod_score
<
289 irq_adapt_low_thresh
)) {
290 if (channel
->irq_moderation
> 1) {
291 channel
->irq_moderation
-= 1;
292 efx
->type
->push_irq_moderation(channel
);
294 } else if (unlikely(channel
->irq_mod_score
>
295 irq_adapt_high_thresh
)) {
296 if (channel
->irq_moderation
<
297 efx
->irq_rx_moderation
) {
298 channel
->irq_moderation
+= 1;
299 efx
->type
->push_irq_moderation(channel
);
302 channel
->irq_count
= 0;
303 channel
->irq_mod_score
= 0;
306 efx_filter_rfs_expire(channel
);
308 /* There is no race here; although napi_disable() will
309 * only wait for napi_complete(), this isn't a problem
310 * since efx_nic_eventq_read_ack() will have no effect if
311 * interrupts have already been disabled.
314 efx_nic_eventq_read_ack(channel
);
317 efx_channel_unlock_napi(channel
);
321 /* Create event queue
322 * Event queue memory allocations are done only once. If the channel
323 * is reset, the memory buffer will be reused; this guards against
324 * errors during channel reset and also simplifies interrupt handling.
326 static int efx_probe_eventq(struct efx_channel
*channel
)
328 struct efx_nic
*efx
= channel
->efx
;
329 unsigned long entries
;
331 netif_dbg(efx
, probe
, efx
->net_dev
,
332 "chan %d create event queue\n", channel
->channel
);
334 /* Build an event queue with room for one event per tx and rx buffer,
335 * plus some extra for link state events and MCDI completions. */
336 entries
= roundup_pow_of_two(efx
->rxq_entries
+ efx
->txq_entries
+ 128);
337 EFX_BUG_ON_PARANOID(entries
> EFX_MAX_EVQ_SIZE
);
338 channel
->eventq_mask
= max(entries
, EFX_MIN_EVQ_SIZE
) - 1;
340 return efx_nic_probe_eventq(channel
);
343 /* Prepare channel's event queue */
344 static int efx_init_eventq(struct efx_channel
*channel
)
346 struct efx_nic
*efx
= channel
->efx
;
349 EFX_WARN_ON_PARANOID(channel
->eventq_init
);
351 netif_dbg(efx
, drv
, efx
->net_dev
,
352 "chan %d init event queue\n", channel
->channel
);
354 rc
= efx_nic_init_eventq(channel
);
356 efx
->type
->push_irq_moderation(channel
);
357 channel
->eventq_read_ptr
= 0;
358 channel
->eventq_init
= true;
363 /* Enable event queue processing and NAPI */
364 void efx_start_eventq(struct efx_channel
*channel
)
366 netif_dbg(channel
->efx
, ifup
, channel
->efx
->net_dev
,
367 "chan %d start event queue\n", channel
->channel
);
369 /* Make sure the NAPI handler sees the enabled flag set */
370 channel
->enabled
= true;
373 efx_channel_enable(channel
);
374 napi_enable(&channel
->napi_str
);
375 efx_nic_eventq_read_ack(channel
);
378 /* Disable event queue processing and NAPI */
379 void efx_stop_eventq(struct efx_channel
*channel
)
381 if (!channel
->enabled
)
384 napi_disable(&channel
->napi_str
);
385 while (!efx_channel_disable(channel
))
386 usleep_range(1000, 20000);
387 channel
->enabled
= false;
390 static void efx_fini_eventq(struct efx_channel
*channel
)
392 if (!channel
->eventq_init
)
395 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
396 "chan %d fini event queue\n", channel
->channel
);
398 efx_nic_fini_eventq(channel
);
399 channel
->eventq_init
= false;
402 static void efx_remove_eventq(struct efx_channel
*channel
)
404 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
405 "chan %d remove event queue\n", channel
->channel
);
407 efx_nic_remove_eventq(channel
);
410 /**************************************************************************
414 *************************************************************************/
416 /* Allocate and initialise a channel structure. */
417 static struct efx_channel
*
418 efx_alloc_channel(struct efx_nic
*efx
, int i
, struct efx_channel
*old_channel
)
420 struct efx_channel
*channel
;
421 struct efx_rx_queue
*rx_queue
;
422 struct efx_tx_queue
*tx_queue
;
425 channel
= kzalloc(sizeof(*channel
), GFP_KERNEL
);
430 channel
->channel
= i
;
431 channel
->type
= &efx_default_channel_type
;
433 for (j
= 0; j
< EFX_TXQ_TYPES
; j
++) {
434 tx_queue
= &channel
->tx_queue
[j
];
436 tx_queue
->queue
= i
* EFX_TXQ_TYPES
+ j
;
437 tx_queue
->channel
= channel
;
440 rx_queue
= &channel
->rx_queue
;
442 setup_timer(&rx_queue
->slow_fill
, efx_rx_slow_fill
,
443 (unsigned long)rx_queue
);
448 /* Allocate and initialise a channel structure, copying parameters
449 * (but not resources) from an old channel structure.
451 static struct efx_channel
*
452 efx_copy_channel(const struct efx_channel
*old_channel
)
454 struct efx_channel
*channel
;
455 struct efx_rx_queue
*rx_queue
;
456 struct efx_tx_queue
*tx_queue
;
459 channel
= kmalloc(sizeof(*channel
), GFP_KERNEL
);
463 *channel
= *old_channel
;
465 channel
->napi_dev
= NULL
;
466 memset(&channel
->eventq
, 0, sizeof(channel
->eventq
));
468 for (j
= 0; j
< EFX_TXQ_TYPES
; j
++) {
469 tx_queue
= &channel
->tx_queue
[j
];
470 if (tx_queue
->channel
)
471 tx_queue
->channel
= channel
;
472 tx_queue
->buffer
= NULL
;
473 memset(&tx_queue
->txd
, 0, sizeof(tx_queue
->txd
));
476 rx_queue
= &channel
->rx_queue
;
477 rx_queue
->buffer
= NULL
;
478 memset(&rx_queue
->rxd
, 0, sizeof(rx_queue
->rxd
));
479 setup_timer(&rx_queue
->slow_fill
, efx_rx_slow_fill
,
480 (unsigned long)rx_queue
);
485 static int efx_probe_channel(struct efx_channel
*channel
)
487 struct efx_tx_queue
*tx_queue
;
488 struct efx_rx_queue
*rx_queue
;
491 netif_dbg(channel
->efx
, probe
, channel
->efx
->net_dev
,
492 "creating channel %d\n", channel
->channel
);
494 rc
= channel
->type
->pre_probe(channel
);
498 rc
= efx_probe_eventq(channel
);
502 efx_for_each_channel_tx_queue(tx_queue
, channel
) {
503 rc
= efx_probe_tx_queue(tx_queue
);
508 efx_for_each_channel_rx_queue(rx_queue
, channel
) {
509 rc
= efx_probe_rx_queue(rx_queue
);
517 efx_remove_channel(channel
);
522 efx_get_channel_name(struct efx_channel
*channel
, char *buf
, size_t len
)
524 struct efx_nic
*efx
= channel
->efx
;
528 number
= channel
->channel
;
529 if (efx
->tx_channel_offset
== 0) {
531 } else if (channel
->channel
< efx
->tx_channel_offset
) {
535 number
-= efx
->tx_channel_offset
;
537 snprintf(buf
, len
, "%s%s-%d", efx
->name
, type
, number
);
540 static void efx_set_channel_names(struct efx_nic
*efx
)
542 struct efx_channel
*channel
;
544 efx_for_each_channel(channel
, efx
)
545 channel
->type
->get_name(channel
,
546 efx
->msi_context
[channel
->channel
].name
,
547 sizeof(efx
->msi_context
[0].name
));
550 static int efx_probe_channels(struct efx_nic
*efx
)
552 struct efx_channel
*channel
;
555 /* Restart special buffer allocation */
556 efx
->next_buffer_table
= 0;
558 /* Probe channels in reverse, so that any 'extra' channels
559 * use the start of the buffer table. This allows the traffic
560 * channels to be resized without moving them or wasting the
561 * entries before them.
563 efx_for_each_channel_rev(channel
, efx
) {
564 rc
= efx_probe_channel(channel
);
566 netif_err(efx
, probe
, efx
->net_dev
,
567 "failed to create channel %d\n",
572 efx_set_channel_names(efx
);
577 efx_remove_channels(efx
);
581 /* Channels are shutdown and reinitialised whilst the NIC is running
582 * to propagate configuration changes (mtu, checksum offload), or
583 * to clear hardware error conditions
585 static void efx_start_datapath(struct efx_nic
*efx
)
587 bool old_rx_scatter
= efx
->rx_scatter
;
588 struct efx_tx_queue
*tx_queue
;
589 struct efx_rx_queue
*rx_queue
;
590 struct efx_channel
*channel
;
593 /* Calculate the rx buffer allocation parameters required to
594 * support the current MTU, including padding for header
595 * alignment and overruns.
597 efx
->rx_dma_len
= (efx
->rx_prefix_size
+
598 EFX_MAX_FRAME_LEN(efx
->net_dev
->mtu
) +
599 efx
->type
->rx_buffer_padding
);
600 rx_buf_len
= (sizeof(struct efx_rx_page_state
) +
601 efx
->rx_ip_align
+ efx
->rx_dma_len
);
602 if (rx_buf_len
<= PAGE_SIZE
) {
603 efx
->rx_scatter
= efx
->type
->always_rx_scatter
;
604 efx
->rx_buffer_order
= 0;
605 } else if (efx
->type
->can_rx_scatter
) {
606 BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE
% L1_CACHE_BYTES
);
607 BUILD_BUG_ON(sizeof(struct efx_rx_page_state
) +
608 2 * ALIGN(NET_IP_ALIGN
+ EFX_RX_USR_BUF_SIZE
,
609 EFX_RX_BUF_ALIGNMENT
) >
611 efx
->rx_scatter
= true;
612 efx
->rx_dma_len
= EFX_RX_USR_BUF_SIZE
;
613 efx
->rx_buffer_order
= 0;
615 efx
->rx_scatter
= false;
616 efx
->rx_buffer_order
= get_order(rx_buf_len
);
619 efx_rx_config_page_split(efx
);
620 if (efx
->rx_buffer_order
)
621 netif_dbg(efx
, drv
, efx
->net_dev
,
622 "RX buf len=%u; page order=%u batch=%u\n",
623 efx
->rx_dma_len
, efx
->rx_buffer_order
,
624 efx
->rx_pages_per_batch
);
626 netif_dbg(efx
, drv
, efx
->net_dev
,
627 "RX buf len=%u step=%u bpp=%u; page batch=%u\n",
628 efx
->rx_dma_len
, efx
->rx_page_buf_step
,
629 efx
->rx_bufs_per_page
, efx
->rx_pages_per_batch
);
631 /* RX filters may also have scatter-enabled flags */
632 if (efx
->rx_scatter
!= old_rx_scatter
)
633 efx
->type
->filter_update_rx_scatter(efx
);
635 /* We must keep at least one descriptor in a TX ring empty.
636 * We could avoid this when the queue size does not exactly
637 * match the hardware ring size, but it's not that important.
638 * Therefore we stop the queue when one more skb might fill
639 * the ring completely. We wake it when half way back to
642 efx
->txq_stop_thresh
= efx
->txq_entries
- efx_tx_max_skb_descs(efx
);
643 efx
->txq_wake_thresh
= efx
->txq_stop_thresh
/ 2;
645 /* Initialise the channels */
646 efx_for_each_channel(channel
, efx
) {
647 efx_for_each_channel_tx_queue(tx_queue
, channel
) {
648 efx_init_tx_queue(tx_queue
);
649 atomic_inc(&efx
->active_queues
);
652 efx_for_each_channel_rx_queue(rx_queue
, channel
) {
653 efx_init_rx_queue(rx_queue
);
654 atomic_inc(&efx
->active_queues
);
655 efx_stop_eventq(channel
);
656 efx_fast_push_rx_descriptors(rx_queue
, false);
657 efx_start_eventq(channel
);
660 WARN_ON(channel
->rx_pkt_n_frags
);
663 efx_ptp_start_datapath(efx
);
665 if (netif_device_present(efx
->net_dev
))
666 netif_tx_wake_all_queues(efx
->net_dev
);
669 static void efx_stop_datapath(struct efx_nic
*efx
)
671 struct efx_channel
*channel
;
672 struct efx_tx_queue
*tx_queue
;
673 struct efx_rx_queue
*rx_queue
;
676 EFX_ASSERT_RESET_SERIALISED(efx
);
677 BUG_ON(efx
->port_enabled
);
679 efx_ptp_stop_datapath(efx
);
682 efx_for_each_channel(channel
, efx
) {
683 efx_for_each_channel_rx_queue(rx_queue
, channel
)
684 rx_queue
->refill_enabled
= false;
687 efx_for_each_channel(channel
, efx
) {
688 /* RX packet processing is pipelined, so wait for the
689 * NAPI handler to complete. At least event queue 0
690 * might be kept active by non-data events, so don't
691 * use napi_synchronize() but actually disable NAPI
694 if (efx_channel_has_rx_queue(channel
)) {
695 efx_stop_eventq(channel
);
696 efx_start_eventq(channel
);
700 rc
= efx
->type
->fini_dmaq(efx
);
701 if (rc
&& EFX_WORKAROUND_7803(efx
)) {
702 /* Schedule a reset to recover from the flush failure. The
703 * descriptor caches reference memory we're about to free,
704 * but falcon_reconfigure_mac_wrapper() won't reconnect
705 * the MACs because of the pending reset.
707 netif_err(efx
, drv
, efx
->net_dev
,
708 "Resetting to recover from flush failure\n");
709 efx_schedule_reset(efx
, RESET_TYPE_ALL
);
711 netif_err(efx
, drv
, efx
->net_dev
, "failed to flush queues\n");
713 netif_dbg(efx
, drv
, efx
->net_dev
,
714 "successfully flushed all queues\n");
717 efx_for_each_channel(channel
, efx
) {
718 efx_for_each_channel_rx_queue(rx_queue
, channel
)
719 efx_fini_rx_queue(rx_queue
);
720 efx_for_each_possible_channel_tx_queue(tx_queue
, channel
)
721 efx_fini_tx_queue(tx_queue
);
725 static void efx_remove_channel(struct efx_channel
*channel
)
727 struct efx_tx_queue
*tx_queue
;
728 struct efx_rx_queue
*rx_queue
;
730 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
731 "destroy chan %d\n", channel
->channel
);
733 efx_for_each_channel_rx_queue(rx_queue
, channel
)
734 efx_remove_rx_queue(rx_queue
);
735 efx_for_each_possible_channel_tx_queue(tx_queue
, channel
)
736 efx_remove_tx_queue(tx_queue
);
737 efx_remove_eventq(channel
);
738 channel
->type
->post_remove(channel
);
741 static void efx_remove_channels(struct efx_nic
*efx
)
743 struct efx_channel
*channel
;
745 efx_for_each_channel(channel
, efx
)
746 efx_remove_channel(channel
);
750 efx_realloc_channels(struct efx_nic
*efx
, u32 rxq_entries
, u32 txq_entries
)
752 struct efx_channel
*other_channel
[EFX_MAX_CHANNELS
], *channel
;
753 u32 old_rxq_entries
, old_txq_entries
;
754 unsigned i
, next_buffer_table
= 0;
757 rc
= efx_check_disabled(efx
);
761 /* Not all channels should be reallocated. We must avoid
762 * reallocating their buffer table entries.
764 efx_for_each_channel(channel
, efx
) {
765 struct efx_rx_queue
*rx_queue
;
766 struct efx_tx_queue
*tx_queue
;
768 if (channel
->type
->copy
)
770 next_buffer_table
= max(next_buffer_table
,
771 channel
->eventq
.index
+
772 channel
->eventq
.entries
);
773 efx_for_each_channel_rx_queue(rx_queue
, channel
)
774 next_buffer_table
= max(next_buffer_table
,
775 rx_queue
->rxd
.index
+
776 rx_queue
->rxd
.entries
);
777 efx_for_each_channel_tx_queue(tx_queue
, channel
)
778 next_buffer_table
= max(next_buffer_table
,
779 tx_queue
->txd
.index
+
780 tx_queue
->txd
.entries
);
783 efx_device_detach_sync(efx
);
785 efx_soft_disable_interrupts(efx
);
787 /* Clone channels (where possible) */
788 memset(other_channel
, 0, sizeof(other_channel
));
789 for (i
= 0; i
< efx
->n_channels
; i
++) {
790 channel
= efx
->channel
[i
];
791 if (channel
->type
->copy
)
792 channel
= channel
->type
->copy(channel
);
797 other_channel
[i
] = channel
;
800 /* Swap entry counts and channel pointers */
801 old_rxq_entries
= efx
->rxq_entries
;
802 old_txq_entries
= efx
->txq_entries
;
803 efx
->rxq_entries
= rxq_entries
;
804 efx
->txq_entries
= txq_entries
;
805 for (i
= 0; i
< efx
->n_channels
; i
++) {
806 channel
= efx
->channel
[i
];
807 efx
->channel
[i
] = other_channel
[i
];
808 other_channel
[i
] = channel
;
811 /* Restart buffer table allocation */
812 efx
->next_buffer_table
= next_buffer_table
;
814 for (i
= 0; i
< efx
->n_channels
; i
++) {
815 channel
= efx
->channel
[i
];
816 if (!channel
->type
->copy
)
818 rc
= efx_probe_channel(channel
);
821 efx_init_napi_channel(efx
->channel
[i
]);
825 /* Destroy unused channel structures */
826 for (i
= 0; i
< efx
->n_channels
; i
++) {
827 channel
= other_channel
[i
];
828 if (channel
&& channel
->type
->copy
) {
829 efx_fini_napi_channel(channel
);
830 efx_remove_channel(channel
);
835 rc2
= efx_soft_enable_interrupts(efx
);
838 netif_err(efx
, drv
, efx
->net_dev
,
839 "unable to restart interrupts on channel reallocation\n");
840 efx_schedule_reset(efx
, RESET_TYPE_DISABLE
);
843 netif_device_attach(efx
->net_dev
);
849 efx
->rxq_entries
= old_rxq_entries
;
850 efx
->txq_entries
= old_txq_entries
;
851 for (i
= 0; i
< efx
->n_channels
; i
++) {
852 channel
= efx
->channel
[i
];
853 efx
->channel
[i
] = other_channel
[i
];
854 other_channel
[i
] = channel
;
859 void efx_schedule_slow_fill(struct efx_rx_queue
*rx_queue
)
861 mod_timer(&rx_queue
->slow_fill
, jiffies
+ msecs_to_jiffies(100));
864 static const struct efx_channel_type efx_default_channel_type
= {
865 .pre_probe
= efx_channel_dummy_op_int
,
866 .post_remove
= efx_channel_dummy_op_void
,
867 .get_name
= efx_get_channel_name
,
868 .copy
= efx_copy_channel
,
869 .keep_eventq
= false,
872 int efx_channel_dummy_op_int(struct efx_channel
*channel
)
877 void efx_channel_dummy_op_void(struct efx_channel
*channel
)
881 /**************************************************************************
885 **************************************************************************/
887 /* This ensures that the kernel is kept informed (via
888 * netif_carrier_on/off) of the link status, and also maintains the
889 * link status's stop on the port's TX queue.
891 void efx_link_status_changed(struct efx_nic
*efx
)
893 struct efx_link_state
*link_state
= &efx
->link_state
;
895 /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
896 * that no events are triggered between unregister_netdev() and the
897 * driver unloading. A more general condition is that NETDEV_CHANGE
898 * can only be generated between NETDEV_UP and NETDEV_DOWN */
899 if (!netif_running(efx
->net_dev
))
902 if (link_state
->up
!= netif_carrier_ok(efx
->net_dev
)) {
903 efx
->n_link_state_changes
++;
906 netif_carrier_on(efx
->net_dev
);
908 netif_carrier_off(efx
->net_dev
);
911 /* Status message for kernel log */
913 netif_info(efx
, link
, efx
->net_dev
,
914 "link up at %uMbps %s-duplex (MTU %d)\n",
915 link_state
->speed
, link_state
->fd
? "full" : "half",
918 netif_info(efx
, link
, efx
->net_dev
, "link down\n");
921 void efx_link_set_advertising(struct efx_nic
*efx
, u32 advertising
)
923 efx
->link_advertising
= advertising
;
925 if (advertising
& ADVERTISED_Pause
)
926 efx
->wanted_fc
|= (EFX_FC_TX
| EFX_FC_RX
);
928 efx
->wanted_fc
&= ~(EFX_FC_TX
| EFX_FC_RX
);
929 if (advertising
& ADVERTISED_Asym_Pause
)
930 efx
->wanted_fc
^= EFX_FC_TX
;
934 void efx_link_set_wanted_fc(struct efx_nic
*efx
, u8 wanted_fc
)
936 efx
->wanted_fc
= wanted_fc
;
937 if (efx
->link_advertising
) {
938 if (wanted_fc
& EFX_FC_RX
)
939 efx
->link_advertising
|= (ADVERTISED_Pause
|
940 ADVERTISED_Asym_Pause
);
942 efx
->link_advertising
&= ~(ADVERTISED_Pause
|
943 ADVERTISED_Asym_Pause
);
944 if (wanted_fc
& EFX_FC_TX
)
945 efx
->link_advertising
^= ADVERTISED_Asym_Pause
;
949 static void efx_fini_port(struct efx_nic
*efx
);
951 /* Push loopback/power/transmit disable settings to the PHY, and reconfigure
952 * the MAC appropriately. All other PHY configuration changes are pushed
953 * through phy_op->set_settings(), and pushed asynchronously to the MAC
954 * through efx_monitor().
956 * Callers must hold the mac_lock
958 int __efx_reconfigure_port(struct efx_nic
*efx
)
960 enum efx_phy_mode phy_mode
;
963 WARN_ON(!mutex_is_locked(&efx
->mac_lock
));
965 /* Disable PHY transmit in mac level loopbacks */
966 phy_mode
= efx
->phy_mode
;
967 if (LOOPBACK_INTERNAL(efx
))
968 efx
->phy_mode
|= PHY_MODE_TX_DISABLED
;
970 efx
->phy_mode
&= ~PHY_MODE_TX_DISABLED
;
972 rc
= efx
->type
->reconfigure_port(efx
);
975 efx
->phy_mode
= phy_mode
;
980 /* Reinitialise the MAC to pick up new PHY settings, even if the port is
982 int efx_reconfigure_port(struct efx_nic
*efx
)
986 EFX_ASSERT_RESET_SERIALISED(efx
);
988 mutex_lock(&efx
->mac_lock
);
989 rc
= __efx_reconfigure_port(efx
);
990 mutex_unlock(&efx
->mac_lock
);
995 /* Asynchronous work item for changing MAC promiscuity and multicast
996 * hash. Avoid a drain/rx_ingress enable by reconfiguring the current
998 static void efx_mac_work(struct work_struct
*data
)
1000 struct efx_nic
*efx
= container_of(data
, struct efx_nic
, mac_work
);
1002 mutex_lock(&efx
->mac_lock
);
1003 if (efx
->port_enabled
)
1004 efx
->type
->reconfigure_mac(efx
);
1005 mutex_unlock(&efx
->mac_lock
);
1008 static int efx_probe_port(struct efx_nic
*efx
)
1012 netif_dbg(efx
, probe
, efx
->net_dev
, "create port\n");
1015 efx
->phy_mode
= PHY_MODE_SPECIAL
;
1017 /* Connect up MAC/PHY operations table */
1018 rc
= efx
->type
->probe_port(efx
);
1022 /* Initialise MAC address to permanent address */
1023 ether_addr_copy(efx
->net_dev
->dev_addr
, efx
->net_dev
->perm_addr
);
1028 static int efx_init_port(struct efx_nic
*efx
)
1032 netif_dbg(efx
, drv
, efx
->net_dev
, "init port\n");
1034 mutex_lock(&efx
->mac_lock
);
1036 rc
= efx
->phy_op
->init(efx
);
1040 efx
->port_initialized
= true;
1042 /* Reconfigure the MAC before creating dma queues (required for
1043 * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */
1044 efx
->type
->reconfigure_mac(efx
);
1046 /* Ensure the PHY advertises the correct flow control settings */
1047 rc
= efx
->phy_op
->reconfigure(efx
);
1051 mutex_unlock(&efx
->mac_lock
);
1055 efx
->phy_op
->fini(efx
);
1057 mutex_unlock(&efx
->mac_lock
);
1061 static void efx_start_port(struct efx_nic
*efx
)
1063 netif_dbg(efx
, ifup
, efx
->net_dev
, "start port\n");
1064 BUG_ON(efx
->port_enabled
);
1066 mutex_lock(&efx
->mac_lock
);
1067 efx
->port_enabled
= true;
1069 /* Ensure MAC ingress/egress is enabled */
1070 efx
->type
->reconfigure_mac(efx
);
1072 mutex_unlock(&efx
->mac_lock
);
1075 /* Cancel work for MAC reconfiguration, periodic hardware monitoring
1076 * and the async self-test, wait for them to finish and prevent them
1077 * being scheduled again. This doesn't cover online resets, which
1078 * should only be cancelled when removing the device.
1080 static void efx_stop_port(struct efx_nic
*efx
)
1082 netif_dbg(efx
, ifdown
, efx
->net_dev
, "stop port\n");
1084 EFX_ASSERT_RESET_SERIALISED(efx
);
1086 mutex_lock(&efx
->mac_lock
);
1087 efx
->port_enabled
= false;
1088 mutex_unlock(&efx
->mac_lock
);
1090 /* Serialise against efx_set_multicast_list() */
1091 netif_addr_lock_bh(efx
->net_dev
);
1092 netif_addr_unlock_bh(efx
->net_dev
);
1094 cancel_delayed_work_sync(&efx
->monitor_work
);
1095 efx_selftest_async_cancel(efx
);
1096 cancel_work_sync(&efx
->mac_work
);
1099 static void efx_fini_port(struct efx_nic
*efx
)
1101 netif_dbg(efx
, drv
, efx
->net_dev
, "shut down port\n");
1103 if (!efx
->port_initialized
)
1106 efx
->phy_op
->fini(efx
);
1107 efx
->port_initialized
= false;
1109 efx
->link_state
.up
= false;
1110 efx_link_status_changed(efx
);
1113 static void efx_remove_port(struct efx_nic
*efx
)
1115 netif_dbg(efx
, drv
, efx
->net_dev
, "destroying port\n");
1117 efx
->type
->remove_port(efx
);
1120 /**************************************************************************
1124 **************************************************************************/
1126 static LIST_HEAD(efx_primary_list
);
1127 static LIST_HEAD(efx_unassociated_list
);
1129 static bool efx_same_controller(struct efx_nic
*left
, struct efx_nic
*right
)
1131 return left
->type
== right
->type
&&
1132 left
->vpd_sn
&& right
->vpd_sn
&&
1133 !strcmp(left
->vpd_sn
, right
->vpd_sn
);
1136 static void efx_associate(struct efx_nic
*efx
)
1138 struct efx_nic
*other
, *next
;
1140 if (efx
->primary
== efx
) {
1141 /* Adding primary function; look for secondaries */
1143 netif_dbg(efx
, probe
, efx
->net_dev
, "adding to primary list\n");
1144 list_add_tail(&efx
->node
, &efx_primary_list
);
1146 list_for_each_entry_safe(other
, next
, &efx_unassociated_list
,
1148 if (efx_same_controller(efx
, other
)) {
1149 list_del(&other
->node
);
1150 netif_dbg(other
, probe
, other
->net_dev
,
1151 "moving to secondary list of %s %s\n",
1152 pci_name(efx
->pci_dev
),
1153 efx
->net_dev
->name
);
1154 list_add_tail(&other
->node
,
1155 &efx
->secondary_list
);
1156 other
->primary
= efx
;
1160 /* Adding secondary function; look for primary */
1162 list_for_each_entry(other
, &efx_primary_list
, node
) {
1163 if (efx_same_controller(efx
, other
)) {
1164 netif_dbg(efx
, probe
, efx
->net_dev
,
1165 "adding to secondary list of %s %s\n",
1166 pci_name(other
->pci_dev
),
1167 other
->net_dev
->name
);
1168 list_add_tail(&efx
->node
,
1169 &other
->secondary_list
);
1170 efx
->primary
= other
;
1175 netif_dbg(efx
, probe
, efx
->net_dev
,
1176 "adding to unassociated list\n");
1177 list_add_tail(&efx
->node
, &efx_unassociated_list
);
1181 static void efx_dissociate(struct efx_nic
*efx
)
1183 struct efx_nic
*other
, *next
;
1185 list_del(&efx
->node
);
1186 efx
->primary
= NULL
;
1188 list_for_each_entry_safe(other
, next
, &efx
->secondary_list
, node
) {
1189 list_del(&other
->node
);
1190 netif_dbg(other
, probe
, other
->net_dev
,
1191 "moving to unassociated list\n");
1192 list_add_tail(&other
->node
, &efx_unassociated_list
);
1193 other
->primary
= NULL
;
1197 /* This configures the PCI device to enable I/O and DMA. */
1198 static int efx_init_io(struct efx_nic
*efx
)
1200 struct pci_dev
*pci_dev
= efx
->pci_dev
;
1201 dma_addr_t dma_mask
= efx
->type
->max_dma_mask
;
1202 unsigned int mem_map_size
= efx
->type
->mem_map_size(efx
);
1205 netif_dbg(efx
, probe
, efx
->net_dev
, "initialising I/O\n");
1207 rc
= pci_enable_device(pci_dev
);
1209 netif_err(efx
, probe
, efx
->net_dev
,
1210 "failed to enable PCI device\n");
1214 pci_set_master(pci_dev
);
1216 /* Set the PCI DMA mask. Try all possibilities from our
1217 * genuine mask down to 32 bits, because some architectures
1218 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
1219 * masks event though they reject 46 bit masks.
1221 while (dma_mask
> 0x7fffffffUL
) {
1222 if (dma_supported(&pci_dev
->dev
, dma_mask
)) {
1223 rc
= dma_set_mask_and_coherent(&pci_dev
->dev
, dma_mask
);
1230 netif_err(efx
, probe
, efx
->net_dev
,
1231 "could not find a suitable DMA mask\n");
1234 netif_dbg(efx
, probe
, efx
->net_dev
,
1235 "using DMA mask %llx\n", (unsigned long long) dma_mask
);
1237 efx
->membase_phys
= pci_resource_start(efx
->pci_dev
, EFX_MEM_BAR
);
1238 rc
= pci_request_region(pci_dev
, EFX_MEM_BAR
, "sfc");
1240 netif_err(efx
, probe
, efx
->net_dev
,
1241 "request for memory BAR failed\n");
1245 efx
->membase
= ioremap_nocache(efx
->membase_phys
, mem_map_size
);
1246 if (!efx
->membase
) {
1247 netif_err(efx
, probe
, efx
->net_dev
,
1248 "could not map memory BAR at %llx+%x\n",
1249 (unsigned long long)efx
->membase_phys
, mem_map_size
);
1253 netif_dbg(efx
, probe
, efx
->net_dev
,
1254 "memory BAR at %llx+%x (virtual %p)\n",
1255 (unsigned long long)efx
->membase_phys
, mem_map_size
,
1261 pci_release_region(efx
->pci_dev
, EFX_MEM_BAR
);
1263 efx
->membase_phys
= 0;
1265 pci_disable_device(efx
->pci_dev
);
1270 static void efx_fini_io(struct efx_nic
*efx
)
1272 netif_dbg(efx
, drv
, efx
->net_dev
, "shutting down I/O\n");
1275 iounmap(efx
->membase
);
1276 efx
->membase
= NULL
;
1279 if (efx
->membase_phys
) {
1280 pci_release_region(efx
->pci_dev
, EFX_MEM_BAR
);
1281 efx
->membase_phys
= 0;
1284 pci_disable_device(efx
->pci_dev
);
1287 static unsigned int efx_wanted_parallelism(struct efx_nic
*efx
)
1289 cpumask_var_t thread_mask
;
1296 if (unlikely(!zalloc_cpumask_var(&thread_mask
, GFP_KERNEL
))) {
1297 netif_warn(efx
, probe
, efx
->net_dev
,
1298 "RSS disabled due to allocation failure\n");
1303 for_each_online_cpu(cpu
) {
1304 if (!cpumask_test_cpu(cpu
, thread_mask
)) {
1306 cpumask_or(thread_mask
, thread_mask
,
1307 topology_thread_cpumask(cpu
));
1311 free_cpumask_var(thread_mask
);
1314 /* If RSS is requested for the PF *and* VFs then we can't write RSS
1315 * table entries that are inaccessible to VFs
1317 if (efx
->type
->sriov_wanted(efx
) && efx_vf_size(efx
) > 1 &&
1318 count
> efx_vf_size(efx
)) {
1319 netif_warn(efx
, probe
, efx
->net_dev
,
1320 "Reducing number of RSS channels from %u to %u for "
1321 "VF support. Increase vf-msix-limit to use more "
1322 "channels on the PF.\n",
1323 count
, efx_vf_size(efx
));
1324 count
= efx_vf_size(efx
);
1330 /* Probe the number and type of interrupts we are able to obtain, and
1331 * the resulting numbers of channels and RX queues.
1333 static int efx_probe_interrupts(struct efx_nic
*efx
)
1335 unsigned int extra_channels
= 0;
1339 for (i
= 0; i
< EFX_MAX_EXTRA_CHANNELS
; i
++)
1340 if (efx
->extra_channel_type
[i
])
1343 if (efx
->interrupt_mode
== EFX_INT_MODE_MSIX
) {
1344 struct msix_entry xentries
[EFX_MAX_CHANNELS
];
1345 unsigned int n_channels
;
1347 n_channels
= efx_wanted_parallelism(efx
);
1348 if (separate_tx_channels
)
1350 n_channels
+= extra_channels
;
1351 n_channels
= min(n_channels
, efx
->max_channels
);
1353 for (i
= 0; i
< n_channels
; i
++)
1354 xentries
[i
].entry
= i
;
1355 rc
= pci_enable_msix_range(efx
->pci_dev
,
1356 xentries
, 1, n_channels
);
1358 /* Fall back to single channel MSI */
1359 efx
->interrupt_mode
= EFX_INT_MODE_MSI
;
1360 netif_err(efx
, drv
, efx
->net_dev
,
1361 "could not enable MSI-X\n");
1362 } else if (rc
< n_channels
) {
1363 netif_err(efx
, drv
, efx
->net_dev
,
1364 "WARNING: Insufficient MSI-X vectors"
1365 " available (%d < %u).\n", rc
, n_channels
);
1366 netif_err(efx
, drv
, efx
->net_dev
,
1367 "WARNING: Performance may be reduced.\n");
1372 efx
->n_channels
= n_channels
;
1373 if (n_channels
> extra_channels
)
1374 n_channels
-= extra_channels
;
1375 if (separate_tx_channels
) {
1376 efx
->n_tx_channels
= max(n_channels
/ 2, 1U);
1377 efx
->n_rx_channels
= max(n_channels
-
1381 efx
->n_tx_channels
= n_channels
;
1382 efx
->n_rx_channels
= n_channels
;
1384 for (i
= 0; i
< efx
->n_channels
; i
++)
1385 efx_get_channel(efx
, i
)->irq
=
1390 /* Try single interrupt MSI */
1391 if (efx
->interrupt_mode
== EFX_INT_MODE_MSI
) {
1392 efx
->n_channels
= 1;
1393 efx
->n_rx_channels
= 1;
1394 efx
->n_tx_channels
= 1;
1395 rc
= pci_enable_msi(efx
->pci_dev
);
1397 efx_get_channel(efx
, 0)->irq
= efx
->pci_dev
->irq
;
1399 netif_err(efx
, drv
, efx
->net_dev
,
1400 "could not enable MSI\n");
1401 efx
->interrupt_mode
= EFX_INT_MODE_LEGACY
;
1405 /* Assume legacy interrupts */
1406 if (efx
->interrupt_mode
== EFX_INT_MODE_LEGACY
) {
1407 efx
->n_channels
= 1 + (separate_tx_channels
? 1 : 0);
1408 efx
->n_rx_channels
= 1;
1409 efx
->n_tx_channels
= 1;
1410 efx
->legacy_irq
= efx
->pci_dev
->irq
;
1413 /* Assign extra channels if possible */
1414 j
= efx
->n_channels
;
1415 for (i
= 0; i
< EFX_MAX_EXTRA_CHANNELS
; i
++) {
1416 if (!efx
->extra_channel_type
[i
])
1418 if (efx
->interrupt_mode
!= EFX_INT_MODE_MSIX
||
1419 efx
->n_channels
<= extra_channels
) {
1420 efx
->extra_channel_type
[i
]->handle_no_channel(efx
);
1423 efx_get_channel(efx
, j
)->type
=
1424 efx
->extra_channel_type
[i
];
1428 /* RSS might be usable on VFs even if it is disabled on the PF */
1430 efx
->rss_spread
= ((efx
->n_rx_channels
> 1 ||
1431 !efx
->type
->sriov_wanted(efx
)) ?
1432 efx
->n_rx_channels
: efx_vf_size(efx
));
1437 static int efx_soft_enable_interrupts(struct efx_nic
*efx
)
1439 struct efx_channel
*channel
, *end_channel
;
1442 BUG_ON(efx
->state
== STATE_DISABLED
);
1444 efx
->irq_soft_enabled
= true;
1447 efx_for_each_channel(channel
, efx
) {
1448 if (!channel
->type
->keep_eventq
) {
1449 rc
= efx_init_eventq(channel
);
1453 efx_start_eventq(channel
);
1456 efx_mcdi_mode_event(efx
);
1460 end_channel
= channel
;
1461 efx_for_each_channel(channel
, efx
) {
1462 if (channel
== end_channel
)
1464 efx_stop_eventq(channel
);
1465 if (!channel
->type
->keep_eventq
)
1466 efx_fini_eventq(channel
);
1472 static void efx_soft_disable_interrupts(struct efx_nic
*efx
)
1474 struct efx_channel
*channel
;
1476 if (efx
->state
== STATE_DISABLED
)
1479 efx_mcdi_mode_poll(efx
);
1481 efx
->irq_soft_enabled
= false;
1484 if (efx
->legacy_irq
)
1485 synchronize_irq(efx
->legacy_irq
);
1487 efx_for_each_channel(channel
, efx
) {
1489 synchronize_irq(channel
->irq
);
1491 efx_stop_eventq(channel
);
1492 if (!channel
->type
->keep_eventq
)
1493 efx_fini_eventq(channel
);
1496 /* Flush the asynchronous MCDI request queue */
1497 efx_mcdi_flush_async(efx
);
1500 static int efx_enable_interrupts(struct efx_nic
*efx
)
1502 struct efx_channel
*channel
, *end_channel
;
1505 BUG_ON(efx
->state
== STATE_DISABLED
);
1507 if (efx
->eeh_disabled_legacy_irq
) {
1508 enable_irq(efx
->legacy_irq
);
1509 efx
->eeh_disabled_legacy_irq
= false;
1512 efx
->type
->irq_enable_master(efx
);
1514 efx_for_each_channel(channel
, efx
) {
1515 if (channel
->type
->keep_eventq
) {
1516 rc
= efx_init_eventq(channel
);
1522 rc
= efx_soft_enable_interrupts(efx
);
1529 end_channel
= channel
;
1530 efx_for_each_channel(channel
, efx
) {
1531 if (channel
== end_channel
)
1533 if (channel
->type
->keep_eventq
)
1534 efx_fini_eventq(channel
);
1537 efx
->type
->irq_disable_non_ev(efx
);
1542 static void efx_disable_interrupts(struct efx_nic
*efx
)
1544 struct efx_channel
*channel
;
1546 efx_soft_disable_interrupts(efx
);
1548 efx_for_each_channel(channel
, efx
) {
1549 if (channel
->type
->keep_eventq
)
1550 efx_fini_eventq(channel
);
1553 efx
->type
->irq_disable_non_ev(efx
);
1556 static void efx_remove_interrupts(struct efx_nic
*efx
)
1558 struct efx_channel
*channel
;
1560 /* Remove MSI/MSI-X interrupts */
1561 efx_for_each_channel(channel
, efx
)
1563 pci_disable_msi(efx
->pci_dev
);
1564 pci_disable_msix(efx
->pci_dev
);
1566 /* Remove legacy interrupt */
1567 efx
->legacy_irq
= 0;
1570 static void efx_set_channels(struct efx_nic
*efx
)
1572 struct efx_channel
*channel
;
1573 struct efx_tx_queue
*tx_queue
;
1575 efx
->tx_channel_offset
=
1576 separate_tx_channels
? efx
->n_channels
- efx
->n_tx_channels
: 0;
1578 /* We need to mark which channels really have RX and TX
1579 * queues, and adjust the TX queue numbers if we have separate
1580 * RX-only and TX-only channels.
1582 efx_for_each_channel(channel
, efx
) {
1583 if (channel
->channel
< efx
->n_rx_channels
)
1584 channel
->rx_queue
.core_index
= channel
->channel
;
1586 channel
->rx_queue
.core_index
= -1;
1588 efx_for_each_channel_tx_queue(tx_queue
, channel
)
1589 tx_queue
->queue
-= (efx
->tx_channel_offset
*
1594 static int efx_probe_nic(struct efx_nic
*efx
)
1599 netif_dbg(efx
, probe
, efx
->net_dev
, "creating NIC\n");
1601 /* Carry out hardware-type specific initialisation */
1602 rc
= efx
->type
->probe(efx
);
1606 /* Determine the number of channels and queues by trying to hook
1607 * in MSI-X interrupts. */
1608 rc
= efx_probe_interrupts(efx
);
1612 efx_set_channels(efx
);
1614 rc
= efx
->type
->dimension_resources(efx
);
1618 if (efx
->n_channels
> 1)
1619 netdev_rss_key_fill(&efx
->rx_hash_key
, sizeof(efx
->rx_hash_key
));
1620 for (i
= 0; i
< ARRAY_SIZE(efx
->rx_indir_table
); i
++)
1621 efx
->rx_indir_table
[i
] =
1622 ethtool_rxfh_indir_default(i
, efx
->rss_spread
);
1624 netif_set_real_num_tx_queues(efx
->net_dev
, efx
->n_tx_channels
);
1625 netif_set_real_num_rx_queues(efx
->net_dev
, efx
->n_rx_channels
);
1627 /* Initialise the interrupt moderation settings */
1628 efx_init_irq_moderation(efx
, tx_irq_mod_usec
, rx_irq_mod_usec
, true,
1634 efx_remove_interrupts(efx
);
1636 efx
->type
->remove(efx
);
1640 static void efx_remove_nic(struct efx_nic
*efx
)
1642 netif_dbg(efx
, drv
, efx
->net_dev
, "destroying NIC\n");
1644 efx_remove_interrupts(efx
);
1645 efx
->type
->remove(efx
);
1648 static int efx_probe_filters(struct efx_nic
*efx
)
1652 spin_lock_init(&efx
->filter_lock
);
1654 rc
= efx
->type
->filter_table_probe(efx
);
1658 #ifdef CONFIG_RFS_ACCEL
1659 if (efx
->type
->offload_features
& NETIF_F_NTUPLE
) {
1660 efx
->rps_flow_id
= kcalloc(efx
->type
->max_rx_ip_filters
,
1661 sizeof(*efx
->rps_flow_id
),
1663 if (!efx
->rps_flow_id
) {
1664 efx
->type
->filter_table_remove(efx
);
1673 static void efx_remove_filters(struct efx_nic
*efx
)
1675 #ifdef CONFIG_RFS_ACCEL
1676 kfree(efx
->rps_flow_id
);
1678 efx
->type
->filter_table_remove(efx
);
1681 static void efx_restore_filters(struct efx_nic
*efx
)
1683 efx
->type
->filter_table_restore(efx
);
1686 /**************************************************************************
1688 * NIC startup/shutdown
1690 *************************************************************************/
1692 static int efx_probe_all(struct efx_nic
*efx
)
1696 rc
= efx_probe_nic(efx
);
1698 netif_err(efx
, probe
, efx
->net_dev
, "failed to create NIC\n");
1702 rc
= efx_probe_port(efx
);
1704 netif_err(efx
, probe
, efx
->net_dev
, "failed to create port\n");
1708 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE
< EFX_RXQ_MIN_ENT
);
1709 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE
< EFX_TXQ_MIN_ENT(efx
))) {
1713 efx
->rxq_entries
= efx
->txq_entries
= EFX_DEFAULT_DMAQ_SIZE
;
1715 rc
= efx_probe_filters(efx
);
1717 netif_err(efx
, probe
, efx
->net_dev
,
1718 "failed to create filter tables\n");
1722 rc
= efx_probe_channels(efx
);
1729 efx_remove_filters(efx
);
1731 efx_remove_port(efx
);
1733 efx_remove_nic(efx
);
1738 /* If the interface is supposed to be running but is not, start
1739 * the hardware and software data path, regular activity for the port
1740 * (MAC statistics, link polling, etc.) and schedule the port to be
1741 * reconfigured. Interrupts must already be enabled. This function
1742 * is safe to call multiple times, so long as the NIC is not disabled.
1743 * Requires the RTNL lock.
1745 static void efx_start_all(struct efx_nic
*efx
)
1747 EFX_ASSERT_RESET_SERIALISED(efx
);
1748 BUG_ON(efx
->state
== STATE_DISABLED
);
1750 /* Check that it is appropriate to restart the interface. All
1751 * of these flags are safe to read under just the rtnl lock */
1752 if (efx
->port_enabled
|| !netif_running(efx
->net_dev
) ||
1756 efx_start_port(efx
);
1757 efx_start_datapath(efx
);
1759 /* Start the hardware monitor if there is one */
1760 if (efx
->type
->monitor
!= NULL
)
1761 queue_delayed_work(efx
->workqueue
, &efx
->monitor_work
,
1762 efx_monitor_interval
);
1764 /* If link state detection is normally event-driven, we have
1765 * to poll now because we could have missed a change
1767 if (efx_nic_rev(efx
) >= EFX_REV_SIENA_A0
) {
1768 mutex_lock(&efx
->mac_lock
);
1769 if (efx
->phy_op
->poll(efx
))
1770 efx_link_status_changed(efx
);
1771 mutex_unlock(&efx
->mac_lock
);
1774 efx
->type
->start_stats(efx
);
1775 efx
->type
->pull_stats(efx
);
1776 spin_lock_bh(&efx
->stats_lock
);
1777 efx
->type
->update_stats(efx
, NULL
, NULL
);
1778 spin_unlock_bh(&efx
->stats_lock
);
1781 /* Quiesce the hardware and software data path, and regular activity
1782 * for the port without bringing the link down. Safe to call multiple
1783 * times with the NIC in almost any state, but interrupts should be
1784 * enabled. Requires the RTNL lock.
1786 static void efx_stop_all(struct efx_nic
*efx
)
1788 EFX_ASSERT_RESET_SERIALISED(efx
);
1790 /* port_enabled can be read safely under the rtnl lock */
1791 if (!efx
->port_enabled
)
1794 /* update stats before we go down so we can accurately count
1797 efx
->type
->pull_stats(efx
);
1798 spin_lock_bh(&efx
->stats_lock
);
1799 efx
->type
->update_stats(efx
, NULL
, NULL
);
1800 spin_unlock_bh(&efx
->stats_lock
);
1801 efx
->type
->stop_stats(efx
);
1804 /* Stop the kernel transmit interface. This is only valid if
1805 * the device is stopped or detached; otherwise the watchdog
1806 * may fire immediately.
1808 WARN_ON(netif_running(efx
->net_dev
) &&
1809 netif_device_present(efx
->net_dev
));
1810 netif_tx_disable(efx
->net_dev
);
1812 efx_stop_datapath(efx
);
1815 static void efx_remove_all(struct efx_nic
*efx
)
1817 efx_remove_channels(efx
);
1818 efx_remove_filters(efx
);
1819 efx_remove_port(efx
);
1820 efx_remove_nic(efx
);
1823 /**************************************************************************
1825 * Interrupt moderation
1827 **************************************************************************/
1829 static unsigned int irq_mod_ticks(unsigned int usecs
, unsigned int quantum_ns
)
1833 if (usecs
* 1000 < quantum_ns
)
1834 return 1; /* never round down to 0 */
1835 return usecs
* 1000 / quantum_ns
;
1838 /* Set interrupt moderation parameters */
1839 int efx_init_irq_moderation(struct efx_nic
*efx
, unsigned int tx_usecs
,
1840 unsigned int rx_usecs
, bool rx_adaptive
,
1841 bool rx_may_override_tx
)
1843 struct efx_channel
*channel
;
1844 unsigned int irq_mod_max
= DIV_ROUND_UP(efx
->type
->timer_period_max
*
1845 efx
->timer_quantum_ns
,
1847 unsigned int tx_ticks
;
1848 unsigned int rx_ticks
;
1850 EFX_ASSERT_RESET_SERIALISED(efx
);
1852 if (tx_usecs
> irq_mod_max
|| rx_usecs
> irq_mod_max
)
1855 tx_ticks
= irq_mod_ticks(tx_usecs
, efx
->timer_quantum_ns
);
1856 rx_ticks
= irq_mod_ticks(rx_usecs
, efx
->timer_quantum_ns
);
1858 if (tx_ticks
!= rx_ticks
&& efx
->tx_channel_offset
== 0 &&
1859 !rx_may_override_tx
) {
1860 netif_err(efx
, drv
, efx
->net_dev
, "Channels are shared. "
1861 "RX and TX IRQ moderation must be equal\n");
1865 efx
->irq_rx_adaptive
= rx_adaptive
;
1866 efx
->irq_rx_moderation
= rx_ticks
;
1867 efx_for_each_channel(channel
, efx
) {
1868 if (efx_channel_has_rx_queue(channel
))
1869 channel
->irq_moderation
= rx_ticks
;
1870 else if (efx_channel_has_tx_queues(channel
))
1871 channel
->irq_moderation
= tx_ticks
;
1877 void efx_get_irq_moderation(struct efx_nic
*efx
, unsigned int *tx_usecs
,
1878 unsigned int *rx_usecs
, bool *rx_adaptive
)
1880 /* We must round up when converting ticks to microseconds
1881 * because we round down when converting the other way.
1884 *rx_adaptive
= efx
->irq_rx_adaptive
;
1885 *rx_usecs
= DIV_ROUND_UP(efx
->irq_rx_moderation
*
1886 efx
->timer_quantum_ns
,
1889 /* If channels are shared between RX and TX, so is IRQ
1890 * moderation. Otherwise, IRQ moderation is the same for all
1891 * TX channels and is not adaptive.
1893 if (efx
->tx_channel_offset
== 0)
1894 *tx_usecs
= *rx_usecs
;
1896 *tx_usecs
= DIV_ROUND_UP(
1897 efx
->channel
[efx
->tx_channel_offset
]->irq_moderation
*
1898 efx
->timer_quantum_ns
,
1902 /**************************************************************************
1906 **************************************************************************/
1908 /* Run periodically off the general workqueue */
1909 static void efx_monitor(struct work_struct
*data
)
1911 struct efx_nic
*efx
= container_of(data
, struct efx_nic
,
1914 netif_vdbg(efx
, timer
, efx
->net_dev
,
1915 "hardware monitor executing on CPU %d\n",
1916 raw_smp_processor_id());
1917 BUG_ON(efx
->type
->monitor
== NULL
);
1919 /* If the mac_lock is already held then it is likely a port
1920 * reconfiguration is already in place, which will likely do
1921 * most of the work of monitor() anyway. */
1922 if (mutex_trylock(&efx
->mac_lock
)) {
1923 if (efx
->port_enabled
)
1924 efx
->type
->monitor(efx
);
1925 mutex_unlock(&efx
->mac_lock
);
1928 queue_delayed_work(efx
->workqueue
, &efx
->monitor_work
,
1929 efx_monitor_interval
);
1932 /**************************************************************************
1936 *************************************************************************/
1939 * Context: process, rtnl_lock() held.
1941 static int efx_ioctl(struct net_device
*net_dev
, struct ifreq
*ifr
, int cmd
)
1943 struct efx_nic
*efx
= netdev_priv(net_dev
);
1944 struct mii_ioctl_data
*data
= if_mii(ifr
);
1946 if (cmd
== SIOCSHWTSTAMP
)
1947 return efx_ptp_set_ts_config(efx
, ifr
);
1948 if (cmd
== SIOCGHWTSTAMP
)
1949 return efx_ptp_get_ts_config(efx
, ifr
);
1951 /* Convert phy_id from older PRTAD/DEVAD format */
1952 if ((cmd
== SIOCGMIIREG
|| cmd
== SIOCSMIIREG
) &&
1953 (data
->phy_id
& 0xfc00) == 0x0400)
1954 data
->phy_id
^= MDIO_PHY_ID_C45
| 0x0400;
1956 return mdio_mii_ioctl(&efx
->mdio
, data
, cmd
);
1959 /**************************************************************************
1963 **************************************************************************/
1965 static void efx_init_napi_channel(struct efx_channel
*channel
)
1967 struct efx_nic
*efx
= channel
->efx
;
1969 channel
->napi_dev
= efx
->net_dev
;
1970 netif_napi_add(channel
->napi_dev
, &channel
->napi_str
,
1971 efx_poll
, napi_weight
);
1972 napi_hash_add(&channel
->napi_str
);
1973 efx_channel_init_lock(channel
);
1976 static void efx_init_napi(struct efx_nic
*efx
)
1978 struct efx_channel
*channel
;
1980 efx_for_each_channel(channel
, efx
)
1981 efx_init_napi_channel(channel
);
1984 static void efx_fini_napi_channel(struct efx_channel
*channel
)
1986 if (channel
->napi_dev
) {
1987 netif_napi_del(&channel
->napi_str
);
1988 napi_hash_del(&channel
->napi_str
);
1990 channel
->napi_dev
= NULL
;
1993 static void efx_fini_napi(struct efx_nic
*efx
)
1995 struct efx_channel
*channel
;
1997 efx_for_each_channel(channel
, efx
)
1998 efx_fini_napi_channel(channel
);
2001 /**************************************************************************
2003 * Kernel netpoll interface
2005 *************************************************************************/
2007 #ifdef CONFIG_NET_POLL_CONTROLLER
2009 /* Although in the common case interrupts will be disabled, this is not
2010 * guaranteed. However, all our work happens inside the NAPI callback,
2011 * so no locking is required.
2013 static void efx_netpoll(struct net_device
*net_dev
)
2015 struct efx_nic
*efx
= netdev_priv(net_dev
);
2016 struct efx_channel
*channel
;
2018 efx_for_each_channel(channel
, efx
)
2019 efx_schedule_channel(channel
);
2024 #ifdef CONFIG_NET_RX_BUSY_POLL
2025 static int efx_busy_poll(struct napi_struct
*napi
)
2027 struct efx_channel
*channel
=
2028 container_of(napi
, struct efx_channel
, napi_str
);
2029 struct efx_nic
*efx
= channel
->efx
;
2031 int old_rx_packets
, rx_packets
;
2033 if (!netif_running(efx
->net_dev
))
2034 return LL_FLUSH_FAILED
;
2036 if (!efx_channel_lock_poll(channel
))
2037 return LL_FLUSH_BUSY
;
2039 old_rx_packets
= channel
->rx_queue
.rx_packets
;
2040 efx_process_channel(channel
, budget
);
2042 rx_packets
= channel
->rx_queue
.rx_packets
- old_rx_packets
;
2044 /* There is no race condition with NAPI here.
2045 * NAPI will automatically be rescheduled if it yielded during busy
2046 * polling, because it was not able to take the lock and thus returned
2049 efx_channel_unlock_poll(channel
);
2055 /**************************************************************************
2057 * Kernel net device interface
2059 *************************************************************************/
2061 /* Context: process, rtnl_lock() held. */
2062 static int efx_net_open(struct net_device
*net_dev
)
2064 struct efx_nic
*efx
= netdev_priv(net_dev
);
2067 netif_dbg(efx
, ifup
, efx
->net_dev
, "opening device on CPU %d\n",
2068 raw_smp_processor_id());
2070 rc
= efx_check_disabled(efx
);
2073 if (efx
->phy_mode
& PHY_MODE_SPECIAL
)
2075 if (efx_mcdi_poll_reboot(efx
) && efx_reset(efx
, RESET_TYPE_ALL
))
2078 /* Notify the kernel of the link state polled during driver load,
2079 * before the monitor starts running */
2080 efx_link_status_changed(efx
);
2083 efx_selftest_async_start(efx
);
2087 /* Context: process, rtnl_lock() held.
2088 * Note that the kernel will ignore our return code; this method
2089 * should really be a void.
2091 static int efx_net_stop(struct net_device
*net_dev
)
2093 struct efx_nic
*efx
= netdev_priv(net_dev
);
2095 netif_dbg(efx
, ifdown
, efx
->net_dev
, "closing on CPU %d\n",
2096 raw_smp_processor_id());
2098 /* Stop the device and flush all the channels */
2104 /* Context: process, dev_base_lock or RTNL held, non-blocking. */
2105 static struct rtnl_link_stats64
*efx_net_stats(struct net_device
*net_dev
,
2106 struct rtnl_link_stats64
*stats
)
2108 struct efx_nic
*efx
= netdev_priv(net_dev
);
2110 spin_lock_bh(&efx
->stats_lock
);
2111 efx
->type
->update_stats(efx
, NULL
, stats
);
2112 spin_unlock_bh(&efx
->stats_lock
);
2117 /* Context: netif_tx_lock held, BHs disabled. */
2118 static void efx_watchdog(struct net_device
*net_dev
)
2120 struct efx_nic
*efx
= netdev_priv(net_dev
);
2122 netif_err(efx
, tx_err
, efx
->net_dev
,
2123 "TX stuck with port_enabled=%d: resetting channels\n",
2126 efx_schedule_reset(efx
, RESET_TYPE_TX_WATCHDOG
);
2130 /* Context: process, rtnl_lock() held. */
2131 static int efx_change_mtu(struct net_device
*net_dev
, int new_mtu
)
2133 struct efx_nic
*efx
= netdev_priv(net_dev
);
2136 rc
= efx_check_disabled(efx
);
2139 if (new_mtu
> EFX_MAX_MTU
)
2142 netif_dbg(efx
, drv
, efx
->net_dev
, "changing MTU to %d\n", new_mtu
);
2144 efx_device_detach_sync(efx
);
2147 mutex_lock(&efx
->mac_lock
);
2148 net_dev
->mtu
= new_mtu
;
2149 efx
->type
->reconfigure_mac(efx
);
2150 mutex_unlock(&efx
->mac_lock
);
2153 netif_device_attach(efx
->net_dev
);
2157 static int efx_set_mac_address(struct net_device
*net_dev
, void *data
)
2159 struct efx_nic
*efx
= netdev_priv(net_dev
);
2160 struct sockaddr
*addr
= data
;
2161 u8
*new_addr
= addr
->sa_data
;
2163 if (!is_valid_ether_addr(new_addr
)) {
2164 netif_err(efx
, drv
, efx
->net_dev
,
2165 "invalid ethernet MAC address requested: %pM\n",
2167 return -EADDRNOTAVAIL
;
2170 ether_addr_copy(net_dev
->dev_addr
, new_addr
);
2171 efx
->type
->sriov_mac_address_changed(efx
);
2173 /* Reconfigure the MAC */
2174 mutex_lock(&efx
->mac_lock
);
2175 efx
->type
->reconfigure_mac(efx
);
2176 mutex_unlock(&efx
->mac_lock
);
2181 /* Context: netif_addr_lock held, BHs disabled. */
2182 static void efx_set_rx_mode(struct net_device
*net_dev
)
2184 struct efx_nic
*efx
= netdev_priv(net_dev
);
2186 if (efx
->port_enabled
)
2187 queue_work(efx
->workqueue
, &efx
->mac_work
);
2188 /* Otherwise efx_start_port() will do this */
2191 static int efx_set_features(struct net_device
*net_dev
, netdev_features_t data
)
2193 struct efx_nic
*efx
= netdev_priv(net_dev
);
2195 /* If disabling RX n-tuple filtering, clear existing filters */
2196 if (net_dev
->features
& ~data
& NETIF_F_NTUPLE
)
2197 return efx
->type
->filter_clear_rx(efx
, EFX_FILTER_PRI_MANUAL
);
2202 static const struct net_device_ops efx_farch_netdev_ops
= {
2203 .ndo_open
= efx_net_open
,
2204 .ndo_stop
= efx_net_stop
,
2205 .ndo_get_stats64
= efx_net_stats
,
2206 .ndo_tx_timeout
= efx_watchdog
,
2207 .ndo_start_xmit
= efx_hard_start_xmit
,
2208 .ndo_validate_addr
= eth_validate_addr
,
2209 .ndo_do_ioctl
= efx_ioctl
,
2210 .ndo_change_mtu
= efx_change_mtu
,
2211 .ndo_set_mac_address
= efx_set_mac_address
,
2212 .ndo_set_rx_mode
= efx_set_rx_mode
,
2213 .ndo_set_features
= efx_set_features
,
2214 #ifdef CONFIG_SFC_SRIOV
2215 .ndo_set_vf_mac
= efx_siena_sriov_set_vf_mac
,
2216 .ndo_set_vf_vlan
= efx_siena_sriov_set_vf_vlan
,
2217 .ndo_set_vf_spoofchk
= efx_siena_sriov_set_vf_spoofchk
,
2218 .ndo_get_vf_config
= efx_siena_sriov_get_vf_config
,
2220 #ifdef CONFIG_NET_POLL_CONTROLLER
2221 .ndo_poll_controller
= efx_netpoll
,
2223 .ndo_setup_tc
= efx_setup_tc
,
2224 #ifdef CONFIG_NET_RX_BUSY_POLL
2225 .ndo_busy_poll
= efx_busy_poll
,
2227 #ifdef CONFIG_RFS_ACCEL
2228 .ndo_rx_flow_steer
= efx_filter_rfs
,
2232 static const struct net_device_ops efx_ef10_netdev_ops
= {
2233 .ndo_open
= efx_net_open
,
2234 .ndo_stop
= efx_net_stop
,
2235 .ndo_get_stats64
= efx_net_stats
,
2236 .ndo_tx_timeout
= efx_watchdog
,
2237 .ndo_start_xmit
= efx_hard_start_xmit
,
2238 .ndo_validate_addr
= eth_validate_addr
,
2239 .ndo_do_ioctl
= efx_ioctl
,
2240 .ndo_change_mtu
= efx_change_mtu
,
2241 .ndo_set_mac_address
= efx_set_mac_address
,
2242 .ndo_set_rx_mode
= efx_set_rx_mode
,
2243 .ndo_set_features
= efx_set_features
,
2244 #ifdef CONFIG_NET_POLL_CONTROLLER
2245 .ndo_poll_controller
= efx_netpoll
,
2247 #ifdef CONFIG_NET_RX_BUSY_POLL
2248 .ndo_busy_poll
= efx_busy_poll
,
2250 #ifdef CONFIG_RFS_ACCEL
2251 .ndo_rx_flow_steer
= efx_filter_rfs
,
2255 static void efx_update_name(struct efx_nic
*efx
)
2257 strcpy(efx
->name
, efx
->net_dev
->name
);
2258 efx_mtd_rename(efx
);
2259 efx_set_channel_names(efx
);
2262 static int efx_netdev_event(struct notifier_block
*this,
2263 unsigned long event
, void *ptr
)
2265 struct net_device
*net_dev
= netdev_notifier_info_to_dev(ptr
);
2267 if ((net_dev
->netdev_ops
== &efx_farch_netdev_ops
||
2268 net_dev
->netdev_ops
== &efx_ef10_netdev_ops
) &&
2269 event
== NETDEV_CHANGENAME
)
2270 efx_update_name(netdev_priv(net_dev
));
2275 static struct notifier_block efx_netdev_notifier
= {
2276 .notifier_call
= efx_netdev_event
,
2280 show_phy_type(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
2282 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
2283 return sprintf(buf
, "%d\n", efx
->phy_type
);
2285 static DEVICE_ATTR(phy_type
, 0444, show_phy_type
, NULL
);
2287 static int efx_register_netdev(struct efx_nic
*efx
)
2289 struct net_device
*net_dev
= efx
->net_dev
;
2290 struct efx_channel
*channel
;
2293 net_dev
->watchdog_timeo
= 5 * HZ
;
2294 net_dev
->irq
= efx
->pci_dev
->irq
;
2295 if (efx_nic_rev(efx
) >= EFX_REV_HUNT_A0
) {
2296 net_dev
->netdev_ops
= &efx_ef10_netdev_ops
;
2297 net_dev
->priv_flags
|= IFF_UNICAST_FLT
;
2299 net_dev
->netdev_ops
= &efx_farch_netdev_ops
;
2301 net_dev
->ethtool_ops
= &efx_ethtool_ops
;
2302 net_dev
->gso_max_segs
= EFX_TSO_MAX_SEGS
;
2306 /* Enable resets to be scheduled and check whether any were
2307 * already requested. If so, the NIC is probably hosed so we
2310 efx
->state
= STATE_READY
;
2311 smp_mb(); /* ensure we change state before checking reset_pending */
2312 if (efx
->reset_pending
) {
2313 netif_err(efx
, probe
, efx
->net_dev
,
2314 "aborting probe due to scheduled reset\n");
2319 rc
= dev_alloc_name(net_dev
, net_dev
->name
);
2322 efx_update_name(efx
);
2324 /* Always start with carrier off; PHY events will detect the link */
2325 netif_carrier_off(net_dev
);
2327 rc
= register_netdevice(net_dev
);
2331 efx_for_each_channel(channel
, efx
) {
2332 struct efx_tx_queue
*tx_queue
;
2333 efx_for_each_channel_tx_queue(tx_queue
, channel
)
2334 efx_init_tx_queue_core_txq(tx_queue
);
2341 rc
= device_create_file(&efx
->pci_dev
->dev
, &dev_attr_phy_type
);
2343 netif_err(efx
, drv
, efx
->net_dev
,
2344 "failed to init net dev attributes\n");
2345 goto fail_registered
;
2352 efx_dissociate(efx
);
2353 unregister_netdevice(net_dev
);
2355 efx
->state
= STATE_UNINIT
;
2357 netif_err(efx
, drv
, efx
->net_dev
, "could not register net dev\n");
2361 static void efx_unregister_netdev(struct efx_nic
*efx
)
2366 BUG_ON(netdev_priv(efx
->net_dev
) != efx
);
2368 strlcpy(efx
->name
, pci_name(efx
->pci_dev
), sizeof(efx
->name
));
2369 device_remove_file(&efx
->pci_dev
->dev
, &dev_attr_phy_type
);
2372 unregister_netdevice(efx
->net_dev
);
2373 efx
->state
= STATE_UNINIT
;
2377 /**************************************************************************
2379 * Device reset and suspend
2381 **************************************************************************/
2383 /* Tears down the entire software state and most of the hardware state
2385 void efx_reset_down(struct efx_nic
*efx
, enum reset_type method
)
2387 EFX_ASSERT_RESET_SERIALISED(efx
);
2389 if (method
== RESET_TYPE_MCDI_TIMEOUT
)
2390 efx
->type
->prepare_flr(efx
);
2393 efx_disable_interrupts(efx
);
2395 mutex_lock(&efx
->mac_lock
);
2396 if (efx
->port_initialized
&& method
!= RESET_TYPE_INVISIBLE
)
2397 efx
->phy_op
->fini(efx
);
2398 efx
->type
->fini(efx
);
2401 /* This function will always ensure that the locks acquired in
2402 * efx_reset_down() are released. A failure return code indicates
2403 * that we were unable to reinitialise the hardware, and the
2404 * driver should be disabled. If ok is false, then the rx and tx
2405 * engines are not restarted, pending a RESET_DISABLE. */
2406 int efx_reset_up(struct efx_nic
*efx
, enum reset_type method
, bool ok
)
2410 EFX_ASSERT_RESET_SERIALISED(efx
);
2412 if (method
== RESET_TYPE_MCDI_TIMEOUT
)
2413 efx
->type
->finish_flr(efx
);
2415 /* Ensure that SRAM is initialised even if we're disabling the device */
2416 rc
= efx
->type
->init(efx
);
2418 netif_err(efx
, drv
, efx
->net_dev
, "failed to initialise NIC\n");
2425 if (efx
->port_initialized
&& method
!= RESET_TYPE_INVISIBLE
) {
2426 rc
= efx
->phy_op
->init(efx
);
2429 if (efx
->phy_op
->reconfigure(efx
))
2430 netif_err(efx
, drv
, efx
->net_dev
,
2431 "could not restore PHY settings\n");
2434 rc
= efx_enable_interrupts(efx
);
2437 efx_restore_filters(efx
);
2438 efx
->type
->sriov_reset(efx
);
2440 mutex_unlock(&efx
->mac_lock
);
2447 efx
->port_initialized
= false;
2449 mutex_unlock(&efx
->mac_lock
);
2454 /* Reset the NIC using the specified method. Note that the reset may
2455 * fail, in which case the card will be left in an unusable state.
2457 * Caller must hold the rtnl_lock.
2459 int efx_reset(struct efx_nic
*efx
, enum reset_type method
)
2464 netif_info(efx
, drv
, efx
->net_dev
, "resetting (%s)\n",
2465 RESET_TYPE(method
));
2467 efx_device_detach_sync(efx
);
2468 efx_reset_down(efx
, method
);
2470 rc
= efx
->type
->reset(efx
, method
);
2472 netif_err(efx
, drv
, efx
->net_dev
, "failed to reset hardware\n");
2476 /* Clear flags for the scopes we covered. We assume the NIC and
2477 * driver are now quiescent so that there is no race here.
2479 if (method
< RESET_TYPE_MAX_METHOD
)
2480 efx
->reset_pending
&= -(1 << (method
+ 1));
2481 else /* it doesn't fit into the well-ordered scope hierarchy */
2482 __clear_bit(method
, &efx
->reset_pending
);
2484 /* Reinitialise bus-mastering, which may have been turned off before
2485 * the reset was scheduled. This is still appropriate, even in the
2486 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
2487 * can respond to requests. */
2488 pci_set_master(efx
->pci_dev
);
2491 /* Leave device stopped if necessary */
2493 method
== RESET_TYPE_DISABLE
||
2494 method
== RESET_TYPE_RECOVER_OR_DISABLE
;
2495 rc2
= efx_reset_up(efx
, method
, !disabled
);
2503 dev_close(efx
->net_dev
);
2504 netif_err(efx
, drv
, efx
->net_dev
, "has been disabled\n");
2505 efx
->state
= STATE_DISABLED
;
2507 netif_dbg(efx
, drv
, efx
->net_dev
, "reset complete\n");
2508 netif_device_attach(efx
->net_dev
);
2513 /* Try recovery mechanisms.
2514 * For now only EEH is supported.
2515 * Returns 0 if the recovery mechanisms are unsuccessful.
2516 * Returns a non-zero value otherwise.
2518 int efx_try_recovery(struct efx_nic
*efx
)
2521 /* A PCI error can occur and not be seen by EEH because nothing
2522 * happens on the PCI bus. In this case the driver may fail and
2523 * schedule a 'recover or reset', leading to this recovery handler.
2524 * Manually call the eeh failure check function.
2526 struct eeh_dev
*eehdev
=
2527 of_node_to_eeh_dev(pci_device_to_OF_node(efx
->pci_dev
));
2529 if (eeh_dev_check_failure(eehdev
)) {
2530 /* The EEH mechanisms will handle the error and reset the
2531 * device if necessary.
2539 static void efx_wait_for_bist_end(struct efx_nic
*efx
)
2543 for (i
= 0; i
< BIST_WAIT_DELAY_COUNT
; ++i
) {
2544 if (efx_mcdi_poll_reboot(efx
))
2546 msleep(BIST_WAIT_DELAY_MS
);
2549 netif_err(efx
, drv
, efx
->net_dev
, "Warning: No MC reboot after BIST mode\n");
2551 /* Either way unset the BIST flag. If we found no reboot we probably
2552 * won't recover, but we should try.
2554 efx
->mc_bist_for_other_fn
= false;
2557 /* The worker thread exists so that code that cannot sleep can
2558 * schedule a reset for later.
2560 static void efx_reset_work(struct work_struct
*data
)
2562 struct efx_nic
*efx
= container_of(data
, struct efx_nic
, reset_work
);
2563 unsigned long pending
;
2564 enum reset_type method
;
2566 pending
= ACCESS_ONCE(efx
->reset_pending
);
2567 method
= fls(pending
) - 1;
2569 if (method
== RESET_TYPE_MC_BIST
)
2570 efx_wait_for_bist_end(efx
);
2572 if ((method
== RESET_TYPE_RECOVER_OR_DISABLE
||
2573 method
== RESET_TYPE_RECOVER_OR_ALL
) &&
2574 efx_try_recovery(efx
))
2582 /* We checked the state in efx_schedule_reset() but it may
2583 * have changed by now. Now that we have the RTNL lock,
2584 * it cannot change again.
2586 if (efx
->state
== STATE_READY
)
2587 (void)efx_reset(efx
, method
);
2592 void efx_schedule_reset(struct efx_nic
*efx
, enum reset_type type
)
2594 enum reset_type method
;
2596 if (efx
->state
== STATE_RECOVERY
) {
2597 netif_dbg(efx
, drv
, efx
->net_dev
,
2598 "recovering: skip scheduling %s reset\n",
2604 case RESET_TYPE_INVISIBLE
:
2605 case RESET_TYPE_ALL
:
2606 case RESET_TYPE_RECOVER_OR_ALL
:
2607 case RESET_TYPE_WORLD
:
2608 case RESET_TYPE_DISABLE
:
2609 case RESET_TYPE_RECOVER_OR_DISABLE
:
2610 case RESET_TYPE_MC_BIST
:
2611 case RESET_TYPE_MCDI_TIMEOUT
:
2613 netif_dbg(efx
, drv
, efx
->net_dev
, "scheduling %s reset\n",
2614 RESET_TYPE(method
));
2617 method
= efx
->type
->map_reset_reason(type
);
2618 netif_dbg(efx
, drv
, efx
->net_dev
,
2619 "scheduling %s reset for %s\n",
2620 RESET_TYPE(method
), RESET_TYPE(type
));
2624 set_bit(method
, &efx
->reset_pending
);
2625 smp_mb(); /* ensure we change reset_pending before checking state */
2627 /* If we're not READY then just leave the flags set as the cue
2628 * to abort probing or reschedule the reset later.
2630 if (ACCESS_ONCE(efx
->state
) != STATE_READY
)
2633 /* efx_process_channel() will no longer read events once a
2634 * reset is scheduled. So switch back to poll'd MCDI completions. */
2635 efx_mcdi_mode_poll(efx
);
2637 queue_work(reset_workqueue
, &efx
->reset_work
);
2640 /**************************************************************************
2642 * List of NICs we support
2644 **************************************************************************/
2646 /* PCI device ID table */
2647 static const struct pci_device_id efx_pci_table
[] = {
2648 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
,
2649 PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0
),
2650 .driver_data
= (unsigned long) &falcon_a1_nic_type
},
2651 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
,
2652 PCI_DEVICE_ID_SOLARFLARE_SFC4000B
),
2653 .driver_data
= (unsigned long) &falcon_b0_nic_type
},
2654 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0803), /* SFC9020 */
2655 .driver_data
= (unsigned long) &siena_a0_nic_type
},
2656 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0813), /* SFL9021 */
2657 .driver_data
= (unsigned long) &siena_a0_nic_type
},
2658 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0903), /* SFC9120 PF */
2659 .driver_data
= (unsigned long) &efx_hunt_a0_nic_type
},
2660 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0923), /* SFC9140 PF */
2661 .driver_data
= (unsigned long) &efx_hunt_a0_nic_type
},
2662 {0} /* end of list */
2665 /**************************************************************************
2667 * Dummy PHY/MAC operations
2669 * Can be used for some unimplemented operations
2670 * Needed so all function pointers are valid and do not have to be tested
2673 **************************************************************************/
2674 int efx_port_dummy_op_int(struct efx_nic
*efx
)
2678 void efx_port_dummy_op_void(struct efx_nic
*efx
) {}
2680 static bool efx_port_dummy_op_poll(struct efx_nic
*efx
)
2685 static const struct efx_phy_operations efx_dummy_phy_operations
= {
2686 .init
= efx_port_dummy_op_int
,
2687 .reconfigure
= efx_port_dummy_op_int
,
2688 .poll
= efx_port_dummy_op_poll
,
2689 .fini
= efx_port_dummy_op_void
,
2692 /**************************************************************************
2696 **************************************************************************/
2698 /* This zeroes out and then fills in the invariants in a struct
2699 * efx_nic (including all sub-structures).
2701 static int efx_init_struct(struct efx_nic
*efx
,
2702 struct pci_dev
*pci_dev
, struct net_device
*net_dev
)
2706 /* Initialise common structures */
2707 INIT_LIST_HEAD(&efx
->node
);
2708 INIT_LIST_HEAD(&efx
->secondary_list
);
2709 spin_lock_init(&efx
->biu_lock
);
2710 #ifdef CONFIG_SFC_MTD
2711 INIT_LIST_HEAD(&efx
->mtd_list
);
2713 INIT_WORK(&efx
->reset_work
, efx_reset_work
);
2714 INIT_DELAYED_WORK(&efx
->monitor_work
, efx_monitor
);
2715 INIT_DELAYED_WORK(&efx
->selftest_work
, efx_selftest_async_work
);
2716 efx
->pci_dev
= pci_dev
;
2717 efx
->msg_enable
= debug
;
2718 efx
->state
= STATE_UNINIT
;
2719 strlcpy(efx
->name
, pci_name(pci_dev
), sizeof(efx
->name
));
2721 efx
->net_dev
= net_dev
;
2722 efx
->rx_prefix_size
= efx
->type
->rx_prefix_size
;
2724 NET_IP_ALIGN
? (efx
->rx_prefix_size
+ NET_IP_ALIGN
) % 4 : 0;
2725 efx
->rx_packet_hash_offset
=
2726 efx
->type
->rx_hash_offset
- efx
->type
->rx_prefix_size
;
2727 efx
->rx_packet_ts_offset
=
2728 efx
->type
->rx_ts_offset
- efx
->type
->rx_prefix_size
;
2729 spin_lock_init(&efx
->stats_lock
);
2730 mutex_init(&efx
->mac_lock
);
2731 efx
->phy_op
= &efx_dummy_phy_operations
;
2732 efx
->mdio
.dev
= net_dev
;
2733 INIT_WORK(&efx
->mac_work
, efx_mac_work
);
2734 init_waitqueue_head(&efx
->flush_wq
);
2736 for (i
= 0; i
< EFX_MAX_CHANNELS
; i
++) {
2737 efx
->channel
[i
] = efx_alloc_channel(efx
, i
, NULL
);
2738 if (!efx
->channel
[i
])
2740 efx
->msi_context
[i
].efx
= efx
;
2741 efx
->msi_context
[i
].index
= i
;
2744 /* Higher numbered interrupt modes are less capable! */
2745 efx
->interrupt_mode
= max(efx
->type
->max_interrupt_mode
,
2748 /* Would be good to use the net_dev name, but we're too early */
2749 snprintf(efx
->workqueue_name
, sizeof(efx
->workqueue_name
), "sfc%s",
2751 efx
->workqueue
= create_singlethread_workqueue(efx
->workqueue_name
);
2752 if (!efx
->workqueue
)
2758 efx_fini_struct(efx
);
2762 static void efx_fini_struct(struct efx_nic
*efx
)
2766 for (i
= 0; i
< EFX_MAX_CHANNELS
; i
++)
2767 kfree(efx
->channel
[i
]);
2771 if (efx
->workqueue
) {
2772 destroy_workqueue(efx
->workqueue
);
2773 efx
->workqueue
= NULL
;
2777 void efx_update_sw_stats(struct efx_nic
*efx
, u64
*stats
)
2779 u64 n_rx_nodesc_trunc
= 0;
2780 struct efx_channel
*channel
;
2782 efx_for_each_channel(channel
, efx
)
2783 n_rx_nodesc_trunc
+= channel
->n_rx_nodesc_trunc
;
2784 stats
[GENERIC_STAT_rx_nodesc_trunc
] = n_rx_nodesc_trunc
;
2785 stats
[GENERIC_STAT_rx_noskb_drops
] = atomic_read(&efx
->n_rx_noskb_drops
);
2788 /**************************************************************************
2792 **************************************************************************/
2794 /* Main body of final NIC shutdown code
2795 * This is called only at module unload (or hotplug removal).
2797 static void efx_pci_remove_main(struct efx_nic
*efx
)
2799 /* Flush reset_work. It can no longer be scheduled since we
2802 BUG_ON(efx
->state
== STATE_READY
);
2803 cancel_work_sync(&efx
->reset_work
);
2805 efx_disable_interrupts(efx
);
2806 efx_nic_fini_interrupt(efx
);
2808 efx
->type
->fini(efx
);
2810 efx_remove_all(efx
);
2813 /* Final NIC shutdown
2814 * This is called only at module unload (or hotplug removal).
2816 static void efx_pci_remove(struct pci_dev
*pci_dev
)
2818 struct efx_nic
*efx
;
2820 efx
= pci_get_drvdata(pci_dev
);
2824 /* Mark the NIC as fini, then stop the interface */
2826 efx_dissociate(efx
);
2827 dev_close(efx
->net_dev
);
2828 efx_disable_interrupts(efx
);
2831 efx
->type
->sriov_fini(efx
);
2832 efx_unregister_netdev(efx
);
2834 efx_mtd_remove(efx
);
2836 efx_pci_remove_main(efx
);
2839 netif_dbg(efx
, drv
, efx
->net_dev
, "shutdown successful\n");
2841 efx_fini_struct(efx
);
2842 free_netdev(efx
->net_dev
);
2844 pci_disable_pcie_error_reporting(pci_dev
);
2847 /* NIC VPD information
2848 * Called during probe to display the part number of the
2849 * installed NIC. VPD is potentially very large but this should
2850 * always appear within the first 512 bytes.
2852 #define SFC_VPD_LEN 512
2853 static void efx_probe_vpd_strings(struct efx_nic
*efx
)
2855 struct pci_dev
*dev
= efx
->pci_dev
;
2856 char vpd_data
[SFC_VPD_LEN
];
2858 int ro_start
, ro_size
, i
, j
;
2860 /* Get the vpd data from the device */
2861 vpd_size
= pci_read_vpd(dev
, 0, sizeof(vpd_data
), vpd_data
);
2862 if (vpd_size
<= 0) {
2863 netif_err(efx
, drv
, efx
->net_dev
, "Unable to read VPD\n");
2867 /* Get the Read only section */
2868 ro_start
= pci_vpd_find_tag(vpd_data
, 0, vpd_size
, PCI_VPD_LRDT_RO_DATA
);
2870 netif_err(efx
, drv
, efx
->net_dev
, "VPD Read-only not found\n");
2874 ro_size
= pci_vpd_lrdt_size(&vpd_data
[ro_start
]);
2876 i
= ro_start
+ PCI_VPD_LRDT_TAG_SIZE
;
2877 if (i
+ j
> vpd_size
)
2880 /* Get the Part number */
2881 i
= pci_vpd_find_info_keyword(vpd_data
, i
, j
, "PN");
2883 netif_err(efx
, drv
, efx
->net_dev
, "Part number not found\n");
2887 j
= pci_vpd_info_field_size(&vpd_data
[i
]);
2888 i
+= PCI_VPD_INFO_FLD_HDR_SIZE
;
2889 if (i
+ j
> vpd_size
) {
2890 netif_err(efx
, drv
, efx
->net_dev
, "Incomplete part number\n");
2894 netif_info(efx
, drv
, efx
->net_dev
,
2895 "Part Number : %.*s\n", j
, &vpd_data
[i
]);
2897 i
= ro_start
+ PCI_VPD_LRDT_TAG_SIZE
;
2899 i
= pci_vpd_find_info_keyword(vpd_data
, i
, j
, "SN");
2901 netif_err(efx
, drv
, efx
->net_dev
, "Serial number not found\n");
2905 j
= pci_vpd_info_field_size(&vpd_data
[i
]);
2906 i
+= PCI_VPD_INFO_FLD_HDR_SIZE
;
2907 if (i
+ j
> vpd_size
) {
2908 netif_err(efx
, drv
, efx
->net_dev
, "Incomplete serial number\n");
2912 efx
->vpd_sn
= kmalloc(j
+ 1, GFP_KERNEL
);
2916 snprintf(efx
->vpd_sn
, j
+ 1, "%s", &vpd_data
[i
]);
2920 /* Main body of NIC initialisation
2921 * This is called at module load (or hotplug insertion, theoretically).
2923 static int efx_pci_probe_main(struct efx_nic
*efx
)
2927 /* Do start-of-day initialisation */
2928 rc
= efx_probe_all(efx
);
2934 rc
= efx
->type
->init(efx
);
2936 netif_err(efx
, probe
, efx
->net_dev
,
2937 "failed to initialise NIC\n");
2941 rc
= efx_init_port(efx
);
2943 netif_err(efx
, probe
, efx
->net_dev
,
2944 "failed to initialise port\n");
2948 rc
= efx_nic_init_interrupt(efx
);
2951 rc
= efx_enable_interrupts(efx
);
2958 efx_nic_fini_interrupt(efx
);
2962 efx
->type
->fini(efx
);
2965 efx_remove_all(efx
);
2970 /* NIC initialisation
2972 * This is called at module load (or hotplug insertion,
2973 * theoretically). It sets up PCI mappings, resets the NIC,
2974 * sets up and registers the network devices with the kernel and hooks
2975 * the interrupt service routine. It does not prepare the device for
2976 * transmission; this is left to the first time one of the network
2977 * interfaces is brought up (i.e. efx_net_open).
2979 static int efx_pci_probe(struct pci_dev
*pci_dev
,
2980 const struct pci_device_id
*entry
)
2982 struct net_device
*net_dev
;
2983 struct efx_nic
*efx
;
2986 /* Allocate and initialise a struct net_device and struct efx_nic */
2987 net_dev
= alloc_etherdev_mqs(sizeof(*efx
), EFX_MAX_CORE_TX_QUEUES
,
2991 efx
= netdev_priv(net_dev
);
2992 efx
->type
= (const struct efx_nic_type
*) entry
->driver_data
;
2993 net_dev
->features
|= (efx
->type
->offload_features
| NETIF_F_SG
|
2994 NETIF_F_HIGHDMA
| NETIF_F_TSO
|
2996 if (efx
->type
->offload_features
& NETIF_F_V6_CSUM
)
2997 net_dev
->features
|= NETIF_F_TSO6
;
2998 /* Mask for features that also apply to VLAN devices */
2999 net_dev
->vlan_features
|= (NETIF_F_ALL_CSUM
| NETIF_F_SG
|
3000 NETIF_F_HIGHDMA
| NETIF_F_ALL_TSO
|
3002 /* All offloads can be toggled */
3003 net_dev
->hw_features
= net_dev
->features
& ~NETIF_F_HIGHDMA
;
3004 pci_set_drvdata(pci_dev
, efx
);
3005 SET_NETDEV_DEV(net_dev
, &pci_dev
->dev
);
3006 rc
= efx_init_struct(efx
, pci_dev
, net_dev
);
3010 netif_info(efx
, probe
, efx
->net_dev
,
3011 "Solarflare NIC detected\n");
3013 efx_probe_vpd_strings(efx
);
3015 /* Set up basic I/O (BAR mappings etc) */
3016 rc
= efx_init_io(efx
);
3020 rc
= efx_pci_probe_main(efx
);
3024 rc
= efx_register_netdev(efx
);
3028 rc
= efx
->type
->sriov_init(efx
);
3030 netif_err(efx
, probe
, efx
->net_dev
,
3031 "SR-IOV can't be enabled rc %d\n", rc
);
3033 netif_dbg(efx
, probe
, efx
->net_dev
, "initialisation successful\n");
3035 /* Try to create MTDs, but allow this to fail */
3037 rc
= efx_mtd_probe(efx
);
3040 netif_warn(efx
, probe
, efx
->net_dev
,
3041 "failed to create MTDs (%d)\n", rc
);
3043 rc
= pci_enable_pcie_error_reporting(pci_dev
);
3044 if (rc
&& rc
!= -EINVAL
)
3045 netif_warn(efx
, probe
, efx
->net_dev
,
3046 "pci_enable_pcie_error_reporting failed (%d)\n", rc
);
3051 efx_pci_remove_main(efx
);
3055 efx_fini_struct(efx
);
3058 netif_dbg(efx
, drv
, efx
->net_dev
, "initialisation failed. rc=%d\n", rc
);
3059 free_netdev(net_dev
);
3063 static int efx_pm_freeze(struct device
*dev
)
3065 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
3069 if (efx
->state
!= STATE_DISABLED
) {
3070 efx
->state
= STATE_UNINIT
;
3072 efx_device_detach_sync(efx
);
3075 efx_disable_interrupts(efx
);
3083 static int efx_pm_thaw(struct device
*dev
)
3086 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
3090 if (efx
->state
!= STATE_DISABLED
) {
3091 rc
= efx_enable_interrupts(efx
);
3095 mutex_lock(&efx
->mac_lock
);
3096 efx
->phy_op
->reconfigure(efx
);
3097 mutex_unlock(&efx
->mac_lock
);
3101 netif_device_attach(efx
->net_dev
);
3103 efx
->state
= STATE_READY
;
3105 efx
->type
->resume_wol(efx
);
3110 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
3111 queue_work(reset_workqueue
, &efx
->reset_work
);
3121 static int efx_pm_poweroff(struct device
*dev
)
3123 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
3124 struct efx_nic
*efx
= pci_get_drvdata(pci_dev
);
3126 efx
->type
->fini(efx
);
3128 efx
->reset_pending
= 0;
3130 pci_save_state(pci_dev
);
3131 return pci_set_power_state(pci_dev
, PCI_D3hot
);
3134 /* Used for both resume and restore */
3135 static int efx_pm_resume(struct device
*dev
)
3137 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
3138 struct efx_nic
*efx
= pci_get_drvdata(pci_dev
);
3141 rc
= pci_set_power_state(pci_dev
, PCI_D0
);
3144 pci_restore_state(pci_dev
);
3145 rc
= pci_enable_device(pci_dev
);
3148 pci_set_master(efx
->pci_dev
);
3149 rc
= efx
->type
->reset(efx
, RESET_TYPE_ALL
);
3152 rc
= efx
->type
->init(efx
);
3155 rc
= efx_pm_thaw(dev
);
3159 static int efx_pm_suspend(struct device
*dev
)
3164 rc
= efx_pm_poweroff(dev
);
3170 static const struct dev_pm_ops efx_pm_ops
= {
3171 .suspend
= efx_pm_suspend
,
3172 .resume
= efx_pm_resume
,
3173 .freeze
= efx_pm_freeze
,
3174 .thaw
= efx_pm_thaw
,
3175 .poweroff
= efx_pm_poweroff
,
3176 .restore
= efx_pm_resume
,
3179 /* A PCI error affecting this device was detected.
3180 * At this point MMIO and DMA may be disabled.
3181 * Stop the software path and request a slot reset.
3183 static pci_ers_result_t
efx_io_error_detected(struct pci_dev
*pdev
,
3184 enum pci_channel_state state
)
3186 pci_ers_result_t status
= PCI_ERS_RESULT_RECOVERED
;
3187 struct efx_nic
*efx
= pci_get_drvdata(pdev
);
3189 if (state
== pci_channel_io_perm_failure
)
3190 return PCI_ERS_RESULT_DISCONNECT
;
3194 if (efx
->state
!= STATE_DISABLED
) {
3195 efx
->state
= STATE_RECOVERY
;
3196 efx
->reset_pending
= 0;
3198 efx_device_detach_sync(efx
);
3201 efx_disable_interrupts(efx
);
3203 status
= PCI_ERS_RESULT_NEED_RESET
;
3205 /* If the interface is disabled we don't want to do anything
3208 status
= PCI_ERS_RESULT_RECOVERED
;
3213 pci_disable_device(pdev
);
3218 /* Fake a successfull reset, which will be performed later in efx_io_resume. */
3219 static pci_ers_result_t
efx_io_slot_reset(struct pci_dev
*pdev
)
3221 struct efx_nic
*efx
= pci_get_drvdata(pdev
);
3222 pci_ers_result_t status
= PCI_ERS_RESULT_RECOVERED
;
3225 if (pci_enable_device(pdev
)) {
3226 netif_err(efx
, hw
, efx
->net_dev
,
3227 "Cannot re-enable PCI device after reset.\n");
3228 status
= PCI_ERS_RESULT_DISCONNECT
;
3231 rc
= pci_cleanup_aer_uncorrect_error_status(pdev
);
3233 netif_err(efx
, hw
, efx
->net_dev
,
3234 "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc
);
3235 /* Non-fatal error. Continue. */
3241 /* Perform the actual reset and resume I/O operations. */
3242 static void efx_io_resume(struct pci_dev
*pdev
)
3244 struct efx_nic
*efx
= pci_get_drvdata(pdev
);
3249 if (efx
->state
== STATE_DISABLED
)
3252 rc
= efx_reset(efx
, RESET_TYPE_ALL
);
3254 netif_err(efx
, hw
, efx
->net_dev
,
3255 "efx_reset failed after PCI error (%d)\n", rc
);
3257 efx
->state
= STATE_READY
;
3258 netif_dbg(efx
, hw
, efx
->net_dev
,
3259 "Done resetting and resuming IO after PCI error.\n");
3266 /* For simplicity and reliability, we always require a slot reset and try to
3267 * reset the hardware when a pci error affecting the device is detected.
3268 * We leave both the link_reset and mmio_enabled callback unimplemented:
3269 * with our request for slot reset the mmio_enabled callback will never be
3270 * called, and the link_reset callback is not used by AER or EEH mechanisms.
3272 static struct pci_error_handlers efx_err_handlers
= {
3273 .error_detected
= efx_io_error_detected
,
3274 .slot_reset
= efx_io_slot_reset
,
3275 .resume
= efx_io_resume
,
3278 static struct pci_driver efx_pci_driver
= {
3279 .name
= KBUILD_MODNAME
,
3280 .id_table
= efx_pci_table
,
3281 .probe
= efx_pci_probe
,
3282 .remove
= efx_pci_remove
,
3283 .driver
.pm
= &efx_pm_ops
,
3284 .err_handler
= &efx_err_handlers
,
3287 /**************************************************************************
3289 * Kernel module interface
3291 *************************************************************************/
3293 module_param(interrupt_mode
, uint
, 0444);
3294 MODULE_PARM_DESC(interrupt_mode
,
3295 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
3297 static int __init
efx_init_module(void)
3301 printk(KERN_INFO
"Solarflare NET driver v" EFX_DRIVER_VERSION
"\n");
3303 rc
= register_netdevice_notifier(&efx_netdev_notifier
);
3307 rc
= efx_init_sriov();
3311 reset_workqueue
= create_singlethread_workqueue("sfc_reset");
3312 if (!reset_workqueue
) {
3317 rc
= pci_register_driver(&efx_pci_driver
);
3324 destroy_workqueue(reset_workqueue
);
3328 unregister_netdevice_notifier(&efx_netdev_notifier
);
3333 static void __exit
efx_exit_module(void)
3335 printk(KERN_INFO
"Solarflare NET driver unloading\n");
3337 pci_unregister_driver(&efx_pci_driver
);
3338 destroy_workqueue(reset_workqueue
);
3340 unregister_netdevice_notifier(&efx_netdev_notifier
);
3344 module_init(efx_init_module
);
3345 module_exit(efx_exit_module
);
3347 MODULE_AUTHOR("Solarflare Communications and "
3348 "Michael Brown <mbrown@fensystems.co.uk>");
3349 MODULE_DESCRIPTION("Solarflare network driver");
3350 MODULE_LICENSE("GPL");
3351 MODULE_DEVICE_TABLE(pci
, efx_pci_table
);