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 netif_vdbg(efx
, intr
, efx
->net_dev
,
276 "channel %d NAPI poll executing on CPU %d\n",
277 channel
->channel
, raw_smp_processor_id());
279 spent
= efx_process_channel(channel
, budget
);
281 if (spent
< budget
) {
282 if (efx_channel_has_rx_queue(channel
) &&
283 efx
->irq_rx_adaptive
&&
284 unlikely(++channel
->irq_count
== 1000)) {
285 if (unlikely(channel
->irq_mod_score
<
286 irq_adapt_low_thresh
)) {
287 if (channel
->irq_moderation
> 1) {
288 channel
->irq_moderation
-= 1;
289 efx
->type
->push_irq_moderation(channel
);
291 } else if (unlikely(channel
->irq_mod_score
>
292 irq_adapt_high_thresh
)) {
293 if (channel
->irq_moderation
<
294 efx
->irq_rx_moderation
) {
295 channel
->irq_moderation
+= 1;
296 efx
->type
->push_irq_moderation(channel
);
299 channel
->irq_count
= 0;
300 channel
->irq_mod_score
= 0;
303 efx_filter_rfs_expire(channel
);
305 /* There is no race here; although napi_disable() will
306 * only wait for napi_complete(), this isn't a problem
307 * since efx_nic_eventq_read_ack() will have no effect if
308 * interrupts have already been disabled.
311 efx_nic_eventq_read_ack(channel
);
317 /* Create event queue
318 * Event queue memory allocations are done only once. If the channel
319 * is reset, the memory buffer will be reused; this guards against
320 * errors during channel reset and also simplifies interrupt handling.
322 static int efx_probe_eventq(struct efx_channel
*channel
)
324 struct efx_nic
*efx
= channel
->efx
;
325 unsigned long entries
;
327 netif_dbg(efx
, probe
, efx
->net_dev
,
328 "chan %d create event queue\n", channel
->channel
);
330 /* Build an event queue with room for one event per tx and rx buffer,
331 * plus some extra for link state events and MCDI completions. */
332 entries
= roundup_pow_of_two(efx
->rxq_entries
+ efx
->txq_entries
+ 128);
333 EFX_BUG_ON_PARANOID(entries
> EFX_MAX_EVQ_SIZE
);
334 channel
->eventq_mask
= max(entries
, EFX_MIN_EVQ_SIZE
) - 1;
336 return efx_nic_probe_eventq(channel
);
339 /* Prepare channel's event queue */
340 static int efx_init_eventq(struct efx_channel
*channel
)
342 struct efx_nic
*efx
= channel
->efx
;
345 EFX_WARN_ON_PARANOID(channel
->eventq_init
);
347 netif_dbg(efx
, drv
, efx
->net_dev
,
348 "chan %d init event queue\n", channel
->channel
);
350 rc
= efx_nic_init_eventq(channel
);
352 efx
->type
->push_irq_moderation(channel
);
353 channel
->eventq_read_ptr
= 0;
354 channel
->eventq_init
= true;
359 /* Enable event queue processing and NAPI */
360 static void efx_start_eventq(struct efx_channel
*channel
)
362 netif_dbg(channel
->efx
, ifup
, channel
->efx
->net_dev
,
363 "chan %d start event queue\n", channel
->channel
);
365 /* Make sure the NAPI handler sees the enabled flag set */
366 channel
->enabled
= true;
369 napi_enable(&channel
->napi_str
);
370 efx_nic_eventq_read_ack(channel
);
373 /* Disable event queue processing and NAPI */
374 static void efx_stop_eventq(struct efx_channel
*channel
)
376 if (!channel
->enabled
)
379 napi_disable(&channel
->napi_str
);
380 channel
->enabled
= false;
383 static void efx_fini_eventq(struct efx_channel
*channel
)
385 if (!channel
->eventq_init
)
388 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
389 "chan %d fini event queue\n", channel
->channel
);
391 efx_nic_fini_eventq(channel
);
392 channel
->eventq_init
= false;
395 static void efx_remove_eventq(struct efx_channel
*channel
)
397 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
398 "chan %d remove event queue\n", channel
->channel
);
400 efx_nic_remove_eventq(channel
);
403 /**************************************************************************
407 *************************************************************************/
409 /* Allocate and initialise a channel structure. */
410 static struct efx_channel
*
411 efx_alloc_channel(struct efx_nic
*efx
, int i
, struct efx_channel
*old_channel
)
413 struct efx_channel
*channel
;
414 struct efx_rx_queue
*rx_queue
;
415 struct efx_tx_queue
*tx_queue
;
418 channel
= kzalloc(sizeof(*channel
), GFP_KERNEL
);
423 channel
->channel
= i
;
424 channel
->type
= &efx_default_channel_type
;
426 for (j
= 0; j
< EFX_TXQ_TYPES
; j
++) {
427 tx_queue
= &channel
->tx_queue
[j
];
429 tx_queue
->queue
= i
* EFX_TXQ_TYPES
+ j
;
430 tx_queue
->channel
= channel
;
433 rx_queue
= &channel
->rx_queue
;
435 setup_timer(&rx_queue
->slow_fill
, efx_rx_slow_fill
,
436 (unsigned long)rx_queue
);
441 /* Allocate and initialise a channel structure, copying parameters
442 * (but not resources) from an old channel structure.
444 static struct efx_channel
*
445 efx_copy_channel(const struct efx_channel
*old_channel
)
447 struct efx_channel
*channel
;
448 struct efx_rx_queue
*rx_queue
;
449 struct efx_tx_queue
*tx_queue
;
452 channel
= kmalloc(sizeof(*channel
), GFP_KERNEL
);
456 *channel
= *old_channel
;
458 channel
->napi_dev
= NULL
;
459 memset(&channel
->eventq
, 0, sizeof(channel
->eventq
));
461 for (j
= 0; j
< EFX_TXQ_TYPES
; j
++) {
462 tx_queue
= &channel
->tx_queue
[j
];
463 if (tx_queue
->channel
)
464 tx_queue
->channel
= channel
;
465 tx_queue
->buffer
= NULL
;
466 memset(&tx_queue
->txd
, 0, sizeof(tx_queue
->txd
));
469 rx_queue
= &channel
->rx_queue
;
470 rx_queue
->buffer
= NULL
;
471 memset(&rx_queue
->rxd
, 0, sizeof(rx_queue
->rxd
));
472 setup_timer(&rx_queue
->slow_fill
, efx_rx_slow_fill
,
473 (unsigned long)rx_queue
);
478 static int efx_probe_channel(struct efx_channel
*channel
)
480 struct efx_tx_queue
*tx_queue
;
481 struct efx_rx_queue
*rx_queue
;
484 netif_dbg(channel
->efx
, probe
, channel
->efx
->net_dev
,
485 "creating channel %d\n", channel
->channel
);
487 rc
= channel
->type
->pre_probe(channel
);
491 rc
= efx_probe_eventq(channel
);
495 efx_for_each_channel_tx_queue(tx_queue
, channel
) {
496 rc
= efx_probe_tx_queue(tx_queue
);
501 efx_for_each_channel_rx_queue(rx_queue
, channel
) {
502 rc
= efx_probe_rx_queue(rx_queue
);
510 efx_remove_channel(channel
);
515 efx_get_channel_name(struct efx_channel
*channel
, char *buf
, size_t len
)
517 struct efx_nic
*efx
= channel
->efx
;
521 number
= channel
->channel
;
522 if (efx
->tx_channel_offset
== 0) {
524 } else if (channel
->channel
< efx
->tx_channel_offset
) {
528 number
-= efx
->tx_channel_offset
;
530 snprintf(buf
, len
, "%s%s-%d", efx
->name
, type
, number
);
533 static void efx_set_channel_names(struct efx_nic
*efx
)
535 struct efx_channel
*channel
;
537 efx_for_each_channel(channel
, efx
)
538 channel
->type
->get_name(channel
,
539 efx
->msi_context
[channel
->channel
].name
,
540 sizeof(efx
->msi_context
[0].name
));
543 static int efx_probe_channels(struct efx_nic
*efx
)
545 struct efx_channel
*channel
;
548 /* Restart special buffer allocation */
549 efx
->next_buffer_table
= 0;
551 /* Probe channels in reverse, so that any 'extra' channels
552 * use the start of the buffer table. This allows the traffic
553 * channels to be resized without moving them or wasting the
554 * entries before them.
556 efx_for_each_channel_rev(channel
, efx
) {
557 rc
= efx_probe_channel(channel
);
559 netif_err(efx
, probe
, efx
->net_dev
,
560 "failed to create channel %d\n",
565 efx_set_channel_names(efx
);
570 efx_remove_channels(efx
);
574 /* Channels are shutdown and reinitialised whilst the NIC is running
575 * to propagate configuration changes (mtu, checksum offload), or
576 * to clear hardware error conditions
578 static void efx_start_datapath(struct efx_nic
*efx
)
580 bool old_rx_scatter
= efx
->rx_scatter
;
581 struct efx_tx_queue
*tx_queue
;
582 struct efx_rx_queue
*rx_queue
;
583 struct efx_channel
*channel
;
586 /* Calculate the rx buffer allocation parameters required to
587 * support the current MTU, including padding for header
588 * alignment and overruns.
590 efx
->rx_dma_len
= (efx
->rx_prefix_size
+
591 EFX_MAX_FRAME_LEN(efx
->net_dev
->mtu
) +
592 efx
->type
->rx_buffer_padding
);
593 rx_buf_len
= (sizeof(struct efx_rx_page_state
) +
594 efx
->rx_ip_align
+ efx
->rx_dma_len
);
595 if (rx_buf_len
<= PAGE_SIZE
) {
596 efx
->rx_scatter
= efx
->type
->always_rx_scatter
;
597 efx
->rx_buffer_order
= 0;
598 } else if (efx
->type
->can_rx_scatter
) {
599 BUILD_BUG_ON(EFX_RX_USR_BUF_SIZE
% L1_CACHE_BYTES
);
600 BUILD_BUG_ON(sizeof(struct efx_rx_page_state
) +
601 2 * ALIGN(NET_IP_ALIGN
+ EFX_RX_USR_BUF_SIZE
,
602 EFX_RX_BUF_ALIGNMENT
) >
604 efx
->rx_scatter
= true;
605 efx
->rx_dma_len
= EFX_RX_USR_BUF_SIZE
;
606 efx
->rx_buffer_order
= 0;
608 efx
->rx_scatter
= false;
609 efx
->rx_buffer_order
= get_order(rx_buf_len
);
612 efx_rx_config_page_split(efx
);
613 if (efx
->rx_buffer_order
)
614 netif_dbg(efx
, drv
, efx
->net_dev
,
615 "RX buf len=%u; page order=%u batch=%u\n",
616 efx
->rx_dma_len
, efx
->rx_buffer_order
,
617 efx
->rx_pages_per_batch
);
619 netif_dbg(efx
, drv
, efx
->net_dev
,
620 "RX buf len=%u step=%u bpp=%u; page batch=%u\n",
621 efx
->rx_dma_len
, efx
->rx_page_buf_step
,
622 efx
->rx_bufs_per_page
, efx
->rx_pages_per_batch
);
624 /* RX filters may also have scatter-enabled flags */
625 if (efx
->rx_scatter
!= old_rx_scatter
)
626 efx
->type
->filter_update_rx_scatter(efx
);
628 /* We must keep at least one descriptor in a TX ring empty.
629 * We could avoid this when the queue size does not exactly
630 * match the hardware ring size, but it's not that important.
631 * Therefore we stop the queue when one more skb might fill
632 * the ring completely. We wake it when half way back to
635 efx
->txq_stop_thresh
= efx
->txq_entries
- efx_tx_max_skb_descs(efx
);
636 efx
->txq_wake_thresh
= efx
->txq_stop_thresh
/ 2;
638 /* Initialise the channels */
639 efx_for_each_channel(channel
, efx
) {
640 efx_for_each_channel_tx_queue(tx_queue
, channel
) {
641 efx_init_tx_queue(tx_queue
);
642 atomic_inc(&efx
->active_queues
);
645 efx_for_each_channel_rx_queue(rx_queue
, channel
) {
646 efx_init_rx_queue(rx_queue
);
647 atomic_inc(&efx
->active_queues
);
648 efx_stop_eventq(channel
);
649 efx_fast_push_rx_descriptors(rx_queue
, false);
650 efx_start_eventq(channel
);
653 WARN_ON(channel
->rx_pkt_n_frags
);
656 efx_ptp_start_datapath(efx
);
658 if (netif_device_present(efx
->net_dev
))
659 netif_tx_wake_all_queues(efx
->net_dev
);
662 static void efx_stop_datapath(struct efx_nic
*efx
)
664 struct efx_channel
*channel
;
665 struct efx_tx_queue
*tx_queue
;
666 struct efx_rx_queue
*rx_queue
;
669 EFX_ASSERT_RESET_SERIALISED(efx
);
670 BUG_ON(efx
->port_enabled
);
672 efx_ptp_stop_datapath(efx
);
675 efx_for_each_channel(channel
, efx
) {
676 efx_for_each_channel_rx_queue(rx_queue
, channel
)
677 rx_queue
->refill_enabled
= false;
680 efx_for_each_channel(channel
, efx
) {
681 /* RX packet processing is pipelined, so wait for the
682 * NAPI handler to complete. At least event queue 0
683 * might be kept active by non-data events, so don't
684 * use napi_synchronize() but actually disable NAPI
687 if (efx_channel_has_rx_queue(channel
)) {
688 efx_stop_eventq(channel
);
689 efx_start_eventq(channel
);
693 rc
= efx
->type
->fini_dmaq(efx
);
694 if (rc
&& EFX_WORKAROUND_7803(efx
)) {
695 /* Schedule a reset to recover from the flush failure. The
696 * descriptor caches reference memory we're about to free,
697 * but falcon_reconfigure_mac_wrapper() won't reconnect
698 * the MACs because of the pending reset.
700 netif_err(efx
, drv
, efx
->net_dev
,
701 "Resetting to recover from flush failure\n");
702 efx_schedule_reset(efx
, RESET_TYPE_ALL
);
704 netif_err(efx
, drv
, efx
->net_dev
, "failed to flush queues\n");
706 netif_dbg(efx
, drv
, efx
->net_dev
,
707 "successfully flushed all queues\n");
710 efx_for_each_channel(channel
, efx
) {
711 efx_for_each_channel_rx_queue(rx_queue
, channel
)
712 efx_fini_rx_queue(rx_queue
);
713 efx_for_each_possible_channel_tx_queue(tx_queue
, channel
)
714 efx_fini_tx_queue(tx_queue
);
718 static void efx_remove_channel(struct efx_channel
*channel
)
720 struct efx_tx_queue
*tx_queue
;
721 struct efx_rx_queue
*rx_queue
;
723 netif_dbg(channel
->efx
, drv
, channel
->efx
->net_dev
,
724 "destroy chan %d\n", channel
->channel
);
726 efx_for_each_channel_rx_queue(rx_queue
, channel
)
727 efx_remove_rx_queue(rx_queue
);
728 efx_for_each_possible_channel_tx_queue(tx_queue
, channel
)
729 efx_remove_tx_queue(tx_queue
);
730 efx_remove_eventq(channel
);
731 channel
->type
->post_remove(channel
);
734 static void efx_remove_channels(struct efx_nic
*efx
)
736 struct efx_channel
*channel
;
738 efx_for_each_channel(channel
, efx
)
739 efx_remove_channel(channel
);
743 efx_realloc_channels(struct efx_nic
*efx
, u32 rxq_entries
, u32 txq_entries
)
745 struct efx_channel
*other_channel
[EFX_MAX_CHANNELS
], *channel
;
746 u32 old_rxq_entries
, old_txq_entries
;
747 unsigned i
, next_buffer_table
= 0;
750 rc
= efx_check_disabled(efx
);
754 /* Not all channels should be reallocated. We must avoid
755 * reallocating their buffer table entries.
757 efx_for_each_channel(channel
, efx
) {
758 struct efx_rx_queue
*rx_queue
;
759 struct efx_tx_queue
*tx_queue
;
761 if (channel
->type
->copy
)
763 next_buffer_table
= max(next_buffer_table
,
764 channel
->eventq
.index
+
765 channel
->eventq
.entries
);
766 efx_for_each_channel_rx_queue(rx_queue
, channel
)
767 next_buffer_table
= max(next_buffer_table
,
768 rx_queue
->rxd
.index
+
769 rx_queue
->rxd
.entries
);
770 efx_for_each_channel_tx_queue(tx_queue
, channel
)
771 next_buffer_table
= max(next_buffer_table
,
772 tx_queue
->txd
.index
+
773 tx_queue
->txd
.entries
);
776 efx_device_detach_sync(efx
);
778 efx_soft_disable_interrupts(efx
);
780 /* Clone channels (where possible) */
781 memset(other_channel
, 0, sizeof(other_channel
));
782 for (i
= 0; i
< efx
->n_channels
; i
++) {
783 channel
= efx
->channel
[i
];
784 if (channel
->type
->copy
)
785 channel
= channel
->type
->copy(channel
);
790 other_channel
[i
] = channel
;
793 /* Swap entry counts and channel pointers */
794 old_rxq_entries
= efx
->rxq_entries
;
795 old_txq_entries
= efx
->txq_entries
;
796 efx
->rxq_entries
= rxq_entries
;
797 efx
->txq_entries
= txq_entries
;
798 for (i
= 0; i
< efx
->n_channels
; i
++) {
799 channel
= efx
->channel
[i
];
800 efx
->channel
[i
] = other_channel
[i
];
801 other_channel
[i
] = channel
;
804 /* Restart buffer table allocation */
805 efx
->next_buffer_table
= next_buffer_table
;
807 for (i
= 0; i
< efx
->n_channels
; i
++) {
808 channel
= efx
->channel
[i
];
809 if (!channel
->type
->copy
)
811 rc
= efx_probe_channel(channel
);
814 efx_init_napi_channel(efx
->channel
[i
]);
818 /* Destroy unused channel structures */
819 for (i
= 0; i
< efx
->n_channels
; i
++) {
820 channel
= other_channel
[i
];
821 if (channel
&& channel
->type
->copy
) {
822 efx_fini_napi_channel(channel
);
823 efx_remove_channel(channel
);
828 rc2
= efx_soft_enable_interrupts(efx
);
831 netif_err(efx
, drv
, efx
->net_dev
,
832 "unable to restart interrupts on channel reallocation\n");
833 efx_schedule_reset(efx
, RESET_TYPE_DISABLE
);
836 netif_device_attach(efx
->net_dev
);
842 efx
->rxq_entries
= old_rxq_entries
;
843 efx
->txq_entries
= old_txq_entries
;
844 for (i
= 0; i
< efx
->n_channels
; i
++) {
845 channel
= efx
->channel
[i
];
846 efx
->channel
[i
] = other_channel
[i
];
847 other_channel
[i
] = channel
;
852 void efx_schedule_slow_fill(struct efx_rx_queue
*rx_queue
)
854 mod_timer(&rx_queue
->slow_fill
, jiffies
+ msecs_to_jiffies(100));
857 static const struct efx_channel_type efx_default_channel_type
= {
858 .pre_probe
= efx_channel_dummy_op_int
,
859 .post_remove
= efx_channel_dummy_op_void
,
860 .get_name
= efx_get_channel_name
,
861 .copy
= efx_copy_channel
,
862 .keep_eventq
= false,
865 int efx_channel_dummy_op_int(struct efx_channel
*channel
)
870 void efx_channel_dummy_op_void(struct efx_channel
*channel
)
874 /**************************************************************************
878 **************************************************************************/
880 /* This ensures that the kernel is kept informed (via
881 * netif_carrier_on/off) of the link status, and also maintains the
882 * link status's stop on the port's TX queue.
884 void efx_link_status_changed(struct efx_nic
*efx
)
886 struct efx_link_state
*link_state
= &efx
->link_state
;
888 /* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
889 * that no events are triggered between unregister_netdev() and the
890 * driver unloading. A more general condition is that NETDEV_CHANGE
891 * can only be generated between NETDEV_UP and NETDEV_DOWN */
892 if (!netif_running(efx
->net_dev
))
895 if (link_state
->up
!= netif_carrier_ok(efx
->net_dev
)) {
896 efx
->n_link_state_changes
++;
899 netif_carrier_on(efx
->net_dev
);
901 netif_carrier_off(efx
->net_dev
);
904 /* Status message for kernel log */
906 netif_info(efx
, link
, efx
->net_dev
,
907 "link up at %uMbps %s-duplex (MTU %d)\n",
908 link_state
->speed
, link_state
->fd
? "full" : "half",
911 netif_info(efx
, link
, efx
->net_dev
, "link down\n");
914 void efx_link_set_advertising(struct efx_nic
*efx
, u32 advertising
)
916 efx
->link_advertising
= advertising
;
918 if (advertising
& ADVERTISED_Pause
)
919 efx
->wanted_fc
|= (EFX_FC_TX
| EFX_FC_RX
);
921 efx
->wanted_fc
&= ~(EFX_FC_TX
| EFX_FC_RX
);
922 if (advertising
& ADVERTISED_Asym_Pause
)
923 efx
->wanted_fc
^= EFX_FC_TX
;
927 void efx_link_set_wanted_fc(struct efx_nic
*efx
, u8 wanted_fc
)
929 efx
->wanted_fc
= wanted_fc
;
930 if (efx
->link_advertising
) {
931 if (wanted_fc
& EFX_FC_RX
)
932 efx
->link_advertising
|= (ADVERTISED_Pause
|
933 ADVERTISED_Asym_Pause
);
935 efx
->link_advertising
&= ~(ADVERTISED_Pause
|
936 ADVERTISED_Asym_Pause
);
937 if (wanted_fc
& EFX_FC_TX
)
938 efx
->link_advertising
^= ADVERTISED_Asym_Pause
;
942 static void efx_fini_port(struct efx_nic
*efx
);
944 /* Push loopback/power/transmit disable settings to the PHY, and reconfigure
945 * the MAC appropriately. All other PHY configuration changes are pushed
946 * through phy_op->set_settings(), and pushed asynchronously to the MAC
947 * through efx_monitor().
949 * Callers must hold the mac_lock
951 int __efx_reconfigure_port(struct efx_nic
*efx
)
953 enum efx_phy_mode phy_mode
;
956 WARN_ON(!mutex_is_locked(&efx
->mac_lock
));
958 /* Disable PHY transmit in mac level loopbacks */
959 phy_mode
= efx
->phy_mode
;
960 if (LOOPBACK_INTERNAL(efx
))
961 efx
->phy_mode
|= PHY_MODE_TX_DISABLED
;
963 efx
->phy_mode
&= ~PHY_MODE_TX_DISABLED
;
965 rc
= efx
->type
->reconfigure_port(efx
);
968 efx
->phy_mode
= phy_mode
;
973 /* Reinitialise the MAC to pick up new PHY settings, even if the port is
975 int efx_reconfigure_port(struct efx_nic
*efx
)
979 EFX_ASSERT_RESET_SERIALISED(efx
);
981 mutex_lock(&efx
->mac_lock
);
982 rc
= __efx_reconfigure_port(efx
);
983 mutex_unlock(&efx
->mac_lock
);
988 /* Asynchronous work item for changing MAC promiscuity and multicast
989 * hash. Avoid a drain/rx_ingress enable by reconfiguring the current
991 static void efx_mac_work(struct work_struct
*data
)
993 struct efx_nic
*efx
= container_of(data
, struct efx_nic
, mac_work
);
995 mutex_lock(&efx
->mac_lock
);
996 if (efx
->port_enabled
)
997 efx
->type
->reconfigure_mac(efx
);
998 mutex_unlock(&efx
->mac_lock
);
1001 static int efx_probe_port(struct efx_nic
*efx
)
1005 netif_dbg(efx
, probe
, efx
->net_dev
, "create port\n");
1008 efx
->phy_mode
= PHY_MODE_SPECIAL
;
1010 /* Connect up MAC/PHY operations table */
1011 rc
= efx
->type
->probe_port(efx
);
1015 /* Initialise MAC address to permanent address */
1016 ether_addr_copy(efx
->net_dev
->dev_addr
, efx
->net_dev
->perm_addr
);
1021 static int efx_init_port(struct efx_nic
*efx
)
1025 netif_dbg(efx
, drv
, efx
->net_dev
, "init port\n");
1027 mutex_lock(&efx
->mac_lock
);
1029 rc
= efx
->phy_op
->init(efx
);
1033 efx
->port_initialized
= true;
1035 /* Reconfigure the MAC before creating dma queues (required for
1036 * Falcon/A1 where RX_INGR_EN/TX_DRAIN_EN isn't supported) */
1037 efx
->type
->reconfigure_mac(efx
);
1039 /* Ensure the PHY advertises the correct flow control settings */
1040 rc
= efx
->phy_op
->reconfigure(efx
);
1044 mutex_unlock(&efx
->mac_lock
);
1048 efx
->phy_op
->fini(efx
);
1050 mutex_unlock(&efx
->mac_lock
);
1054 static void efx_start_port(struct efx_nic
*efx
)
1056 netif_dbg(efx
, ifup
, efx
->net_dev
, "start port\n");
1057 BUG_ON(efx
->port_enabled
);
1059 mutex_lock(&efx
->mac_lock
);
1060 efx
->port_enabled
= true;
1062 /* Ensure MAC ingress/egress is enabled */
1063 efx
->type
->reconfigure_mac(efx
);
1065 mutex_unlock(&efx
->mac_lock
);
1068 /* Cancel work for MAC reconfiguration, periodic hardware monitoring
1069 * and the async self-test, wait for them to finish and prevent them
1070 * being scheduled again. This doesn't cover online resets, which
1071 * should only be cancelled when removing the device.
1073 static void efx_stop_port(struct efx_nic
*efx
)
1075 netif_dbg(efx
, ifdown
, efx
->net_dev
, "stop port\n");
1077 EFX_ASSERT_RESET_SERIALISED(efx
);
1079 mutex_lock(&efx
->mac_lock
);
1080 efx
->port_enabled
= false;
1081 mutex_unlock(&efx
->mac_lock
);
1083 /* Serialise against efx_set_multicast_list() */
1084 netif_addr_lock_bh(efx
->net_dev
);
1085 netif_addr_unlock_bh(efx
->net_dev
);
1087 cancel_delayed_work_sync(&efx
->monitor_work
);
1088 efx_selftest_async_cancel(efx
);
1089 cancel_work_sync(&efx
->mac_work
);
1092 static void efx_fini_port(struct efx_nic
*efx
)
1094 netif_dbg(efx
, drv
, efx
->net_dev
, "shut down port\n");
1096 if (!efx
->port_initialized
)
1099 efx
->phy_op
->fini(efx
);
1100 efx
->port_initialized
= false;
1102 efx
->link_state
.up
= false;
1103 efx_link_status_changed(efx
);
1106 static void efx_remove_port(struct efx_nic
*efx
)
1108 netif_dbg(efx
, drv
, efx
->net_dev
, "destroying port\n");
1110 efx
->type
->remove_port(efx
);
1113 /**************************************************************************
1117 **************************************************************************/
1119 static LIST_HEAD(efx_primary_list
);
1120 static LIST_HEAD(efx_unassociated_list
);
1122 static bool efx_same_controller(struct efx_nic
*left
, struct efx_nic
*right
)
1124 return left
->type
== right
->type
&&
1125 left
->vpd_sn
&& right
->vpd_sn
&&
1126 !strcmp(left
->vpd_sn
, right
->vpd_sn
);
1129 static void efx_associate(struct efx_nic
*efx
)
1131 struct efx_nic
*other
, *next
;
1133 if (efx
->primary
== efx
) {
1134 /* Adding primary function; look for secondaries */
1136 netif_dbg(efx
, probe
, efx
->net_dev
, "adding to primary list\n");
1137 list_add_tail(&efx
->node
, &efx_primary_list
);
1139 list_for_each_entry_safe(other
, next
, &efx_unassociated_list
,
1141 if (efx_same_controller(efx
, other
)) {
1142 list_del(&other
->node
);
1143 netif_dbg(other
, probe
, other
->net_dev
,
1144 "moving to secondary list of %s %s\n",
1145 pci_name(efx
->pci_dev
),
1146 efx
->net_dev
->name
);
1147 list_add_tail(&other
->node
,
1148 &efx
->secondary_list
);
1149 other
->primary
= efx
;
1153 /* Adding secondary function; look for primary */
1155 list_for_each_entry(other
, &efx_primary_list
, node
) {
1156 if (efx_same_controller(efx
, other
)) {
1157 netif_dbg(efx
, probe
, efx
->net_dev
,
1158 "adding to secondary list of %s %s\n",
1159 pci_name(other
->pci_dev
),
1160 other
->net_dev
->name
);
1161 list_add_tail(&efx
->node
,
1162 &other
->secondary_list
);
1163 efx
->primary
= other
;
1168 netif_dbg(efx
, probe
, efx
->net_dev
,
1169 "adding to unassociated list\n");
1170 list_add_tail(&efx
->node
, &efx_unassociated_list
);
1174 static void efx_dissociate(struct efx_nic
*efx
)
1176 struct efx_nic
*other
, *next
;
1178 list_del(&efx
->node
);
1179 efx
->primary
= NULL
;
1181 list_for_each_entry_safe(other
, next
, &efx
->secondary_list
, node
) {
1182 list_del(&other
->node
);
1183 netif_dbg(other
, probe
, other
->net_dev
,
1184 "moving to unassociated list\n");
1185 list_add_tail(&other
->node
, &efx_unassociated_list
);
1186 other
->primary
= NULL
;
1190 /* This configures the PCI device to enable I/O and DMA. */
1191 static int efx_init_io(struct efx_nic
*efx
)
1193 struct pci_dev
*pci_dev
= efx
->pci_dev
;
1194 dma_addr_t dma_mask
= efx
->type
->max_dma_mask
;
1195 unsigned int mem_map_size
= efx
->type
->mem_map_size(efx
);
1198 netif_dbg(efx
, probe
, efx
->net_dev
, "initialising I/O\n");
1200 rc
= pci_enable_device(pci_dev
);
1202 netif_err(efx
, probe
, efx
->net_dev
,
1203 "failed to enable PCI device\n");
1207 pci_set_master(pci_dev
);
1209 /* Set the PCI DMA mask. Try all possibilities from our
1210 * genuine mask down to 32 bits, because some architectures
1211 * (e.g. x86_64 with iommu_sac_force set) will allow 40 bit
1212 * masks event though they reject 46 bit masks.
1214 while (dma_mask
> 0x7fffffffUL
) {
1215 if (dma_supported(&pci_dev
->dev
, dma_mask
)) {
1216 rc
= dma_set_mask_and_coherent(&pci_dev
->dev
, dma_mask
);
1223 netif_err(efx
, probe
, efx
->net_dev
,
1224 "could not find a suitable DMA mask\n");
1227 netif_dbg(efx
, probe
, efx
->net_dev
,
1228 "using DMA mask %llx\n", (unsigned long long) dma_mask
);
1230 efx
->membase_phys
= pci_resource_start(efx
->pci_dev
, EFX_MEM_BAR
);
1231 rc
= pci_request_region(pci_dev
, EFX_MEM_BAR
, "sfc");
1233 netif_err(efx
, probe
, efx
->net_dev
,
1234 "request for memory BAR failed\n");
1238 efx
->membase
= ioremap_nocache(efx
->membase_phys
, mem_map_size
);
1239 if (!efx
->membase
) {
1240 netif_err(efx
, probe
, efx
->net_dev
,
1241 "could not map memory BAR at %llx+%x\n",
1242 (unsigned long long)efx
->membase_phys
, mem_map_size
);
1246 netif_dbg(efx
, probe
, efx
->net_dev
,
1247 "memory BAR at %llx+%x (virtual %p)\n",
1248 (unsigned long long)efx
->membase_phys
, mem_map_size
,
1254 pci_release_region(efx
->pci_dev
, EFX_MEM_BAR
);
1256 efx
->membase_phys
= 0;
1258 pci_disable_device(efx
->pci_dev
);
1263 static void efx_fini_io(struct efx_nic
*efx
)
1265 netif_dbg(efx
, drv
, efx
->net_dev
, "shutting down I/O\n");
1268 iounmap(efx
->membase
);
1269 efx
->membase
= NULL
;
1272 if (efx
->membase_phys
) {
1273 pci_release_region(efx
->pci_dev
, EFX_MEM_BAR
);
1274 efx
->membase_phys
= 0;
1277 pci_disable_device(efx
->pci_dev
);
1280 static unsigned int efx_wanted_parallelism(struct efx_nic
*efx
)
1282 cpumask_var_t thread_mask
;
1289 if (unlikely(!zalloc_cpumask_var(&thread_mask
, GFP_KERNEL
))) {
1290 netif_warn(efx
, probe
, efx
->net_dev
,
1291 "RSS disabled due to allocation failure\n");
1296 for_each_online_cpu(cpu
) {
1297 if (!cpumask_test_cpu(cpu
, thread_mask
)) {
1299 cpumask_or(thread_mask
, thread_mask
,
1300 topology_thread_cpumask(cpu
));
1304 free_cpumask_var(thread_mask
);
1307 /* If RSS is requested for the PF *and* VFs then we can't write RSS
1308 * table entries that are inaccessible to VFs
1310 if (efx_sriov_wanted(efx
) && efx_vf_size(efx
) > 1 &&
1311 count
> efx_vf_size(efx
)) {
1312 netif_warn(efx
, probe
, efx
->net_dev
,
1313 "Reducing number of RSS channels from %u to %u for "
1314 "VF support. Increase vf-msix-limit to use more "
1315 "channels on the PF.\n",
1316 count
, efx_vf_size(efx
));
1317 count
= efx_vf_size(efx
);
1323 /* Probe the number and type of interrupts we are able to obtain, and
1324 * the resulting numbers of channels and RX queues.
1326 static int efx_probe_interrupts(struct efx_nic
*efx
)
1328 unsigned int extra_channels
= 0;
1332 for (i
= 0; i
< EFX_MAX_EXTRA_CHANNELS
; i
++)
1333 if (efx
->extra_channel_type
[i
])
1336 if (efx
->interrupt_mode
== EFX_INT_MODE_MSIX
) {
1337 struct msix_entry xentries
[EFX_MAX_CHANNELS
];
1338 unsigned int n_channels
;
1340 n_channels
= efx_wanted_parallelism(efx
);
1341 if (separate_tx_channels
)
1343 n_channels
+= extra_channels
;
1344 n_channels
= min(n_channels
, efx
->max_channels
);
1346 for (i
= 0; i
< n_channels
; i
++)
1347 xentries
[i
].entry
= i
;
1348 rc
= pci_enable_msix_range(efx
->pci_dev
,
1349 xentries
, 1, n_channels
);
1351 /* Fall back to single channel MSI */
1352 efx
->interrupt_mode
= EFX_INT_MODE_MSI
;
1353 netif_err(efx
, drv
, efx
->net_dev
,
1354 "could not enable MSI-X\n");
1355 } else if (rc
< n_channels
) {
1356 netif_err(efx
, drv
, efx
->net_dev
,
1357 "WARNING: Insufficient MSI-X vectors"
1358 " available (%d < %u).\n", rc
, n_channels
);
1359 netif_err(efx
, drv
, efx
->net_dev
,
1360 "WARNING: Performance may be reduced.\n");
1365 efx
->n_channels
= n_channels
;
1366 if (n_channels
> extra_channels
)
1367 n_channels
-= extra_channels
;
1368 if (separate_tx_channels
) {
1369 efx
->n_tx_channels
= max(n_channels
/ 2, 1U);
1370 efx
->n_rx_channels
= max(n_channels
-
1374 efx
->n_tx_channels
= n_channels
;
1375 efx
->n_rx_channels
= n_channels
;
1377 for (i
= 0; i
< efx
->n_channels
; i
++)
1378 efx_get_channel(efx
, i
)->irq
=
1383 /* Try single interrupt MSI */
1384 if (efx
->interrupt_mode
== EFX_INT_MODE_MSI
) {
1385 efx
->n_channels
= 1;
1386 efx
->n_rx_channels
= 1;
1387 efx
->n_tx_channels
= 1;
1388 rc
= pci_enable_msi(efx
->pci_dev
);
1390 efx_get_channel(efx
, 0)->irq
= efx
->pci_dev
->irq
;
1392 netif_err(efx
, drv
, efx
->net_dev
,
1393 "could not enable MSI\n");
1394 efx
->interrupt_mode
= EFX_INT_MODE_LEGACY
;
1398 /* Assume legacy interrupts */
1399 if (efx
->interrupt_mode
== EFX_INT_MODE_LEGACY
) {
1400 efx
->n_channels
= 1 + (separate_tx_channels
? 1 : 0);
1401 efx
->n_rx_channels
= 1;
1402 efx
->n_tx_channels
= 1;
1403 efx
->legacy_irq
= efx
->pci_dev
->irq
;
1406 /* Assign extra channels if possible */
1407 j
= efx
->n_channels
;
1408 for (i
= 0; i
< EFX_MAX_EXTRA_CHANNELS
; i
++) {
1409 if (!efx
->extra_channel_type
[i
])
1411 if (efx
->interrupt_mode
!= EFX_INT_MODE_MSIX
||
1412 efx
->n_channels
<= extra_channels
) {
1413 efx
->extra_channel_type
[i
]->handle_no_channel(efx
);
1416 efx_get_channel(efx
, j
)->type
=
1417 efx
->extra_channel_type
[i
];
1421 /* RSS might be usable on VFs even if it is disabled on the PF */
1422 efx
->rss_spread
= ((efx
->n_rx_channels
> 1 || !efx_sriov_wanted(efx
)) ?
1423 efx
->n_rx_channels
: efx_vf_size(efx
));
1428 static int efx_soft_enable_interrupts(struct efx_nic
*efx
)
1430 struct efx_channel
*channel
, *end_channel
;
1433 BUG_ON(efx
->state
== STATE_DISABLED
);
1435 efx
->irq_soft_enabled
= true;
1438 efx_for_each_channel(channel
, efx
) {
1439 if (!channel
->type
->keep_eventq
) {
1440 rc
= efx_init_eventq(channel
);
1444 efx_start_eventq(channel
);
1447 efx_mcdi_mode_event(efx
);
1451 end_channel
= channel
;
1452 efx_for_each_channel(channel
, efx
) {
1453 if (channel
== end_channel
)
1455 efx_stop_eventq(channel
);
1456 if (!channel
->type
->keep_eventq
)
1457 efx_fini_eventq(channel
);
1463 static void efx_soft_disable_interrupts(struct efx_nic
*efx
)
1465 struct efx_channel
*channel
;
1467 if (efx
->state
== STATE_DISABLED
)
1470 efx_mcdi_mode_poll(efx
);
1472 efx
->irq_soft_enabled
= false;
1475 if (efx
->legacy_irq
)
1476 synchronize_irq(efx
->legacy_irq
);
1478 efx_for_each_channel(channel
, efx
) {
1480 synchronize_irq(channel
->irq
);
1482 efx_stop_eventq(channel
);
1483 if (!channel
->type
->keep_eventq
)
1484 efx_fini_eventq(channel
);
1487 /* Flush the asynchronous MCDI request queue */
1488 efx_mcdi_flush_async(efx
);
1491 static int efx_enable_interrupts(struct efx_nic
*efx
)
1493 struct efx_channel
*channel
, *end_channel
;
1496 BUG_ON(efx
->state
== STATE_DISABLED
);
1498 if (efx
->eeh_disabled_legacy_irq
) {
1499 enable_irq(efx
->legacy_irq
);
1500 efx
->eeh_disabled_legacy_irq
= false;
1503 efx
->type
->irq_enable_master(efx
);
1505 efx_for_each_channel(channel
, efx
) {
1506 if (channel
->type
->keep_eventq
) {
1507 rc
= efx_init_eventq(channel
);
1513 rc
= efx_soft_enable_interrupts(efx
);
1520 end_channel
= channel
;
1521 efx_for_each_channel(channel
, efx
) {
1522 if (channel
== end_channel
)
1524 if (channel
->type
->keep_eventq
)
1525 efx_fini_eventq(channel
);
1528 efx
->type
->irq_disable_non_ev(efx
);
1533 static void efx_disable_interrupts(struct efx_nic
*efx
)
1535 struct efx_channel
*channel
;
1537 efx_soft_disable_interrupts(efx
);
1539 efx_for_each_channel(channel
, efx
) {
1540 if (channel
->type
->keep_eventq
)
1541 efx_fini_eventq(channel
);
1544 efx
->type
->irq_disable_non_ev(efx
);
1547 static void efx_remove_interrupts(struct efx_nic
*efx
)
1549 struct efx_channel
*channel
;
1551 /* Remove MSI/MSI-X interrupts */
1552 efx_for_each_channel(channel
, efx
)
1554 pci_disable_msi(efx
->pci_dev
);
1555 pci_disable_msix(efx
->pci_dev
);
1557 /* Remove legacy interrupt */
1558 efx
->legacy_irq
= 0;
1561 static void efx_set_channels(struct efx_nic
*efx
)
1563 struct efx_channel
*channel
;
1564 struct efx_tx_queue
*tx_queue
;
1566 efx
->tx_channel_offset
=
1567 separate_tx_channels
? efx
->n_channels
- efx
->n_tx_channels
: 0;
1569 /* We need to mark which channels really have RX and TX
1570 * queues, and adjust the TX queue numbers if we have separate
1571 * RX-only and TX-only channels.
1573 efx_for_each_channel(channel
, efx
) {
1574 if (channel
->channel
< efx
->n_rx_channels
)
1575 channel
->rx_queue
.core_index
= channel
->channel
;
1577 channel
->rx_queue
.core_index
= -1;
1579 efx_for_each_channel_tx_queue(tx_queue
, channel
)
1580 tx_queue
->queue
-= (efx
->tx_channel_offset
*
1585 static int efx_probe_nic(struct efx_nic
*efx
)
1590 netif_dbg(efx
, probe
, efx
->net_dev
, "creating NIC\n");
1592 /* Carry out hardware-type specific initialisation */
1593 rc
= efx
->type
->probe(efx
);
1597 /* Determine the number of channels and queues by trying to hook
1598 * in MSI-X interrupts. */
1599 rc
= efx_probe_interrupts(efx
);
1603 efx_set_channels(efx
);
1605 rc
= efx
->type
->dimension_resources(efx
);
1609 if (efx
->n_channels
> 1)
1610 get_random_bytes(&efx
->rx_hash_key
, sizeof(efx
->rx_hash_key
));
1611 for (i
= 0; i
< ARRAY_SIZE(efx
->rx_indir_table
); i
++)
1612 efx
->rx_indir_table
[i
] =
1613 ethtool_rxfh_indir_default(i
, efx
->rss_spread
);
1615 netif_set_real_num_tx_queues(efx
->net_dev
, efx
->n_tx_channels
);
1616 netif_set_real_num_rx_queues(efx
->net_dev
, efx
->n_rx_channels
);
1618 /* Initialise the interrupt moderation settings */
1619 efx_init_irq_moderation(efx
, tx_irq_mod_usec
, rx_irq_mod_usec
, true,
1625 efx_remove_interrupts(efx
);
1627 efx
->type
->remove(efx
);
1631 static void efx_remove_nic(struct efx_nic
*efx
)
1633 netif_dbg(efx
, drv
, efx
->net_dev
, "destroying NIC\n");
1635 efx_remove_interrupts(efx
);
1636 efx
->type
->remove(efx
);
1639 static int efx_probe_filters(struct efx_nic
*efx
)
1643 spin_lock_init(&efx
->filter_lock
);
1645 rc
= efx
->type
->filter_table_probe(efx
);
1649 #ifdef CONFIG_RFS_ACCEL
1650 if (efx
->type
->offload_features
& NETIF_F_NTUPLE
) {
1651 efx
->rps_flow_id
= kcalloc(efx
->type
->max_rx_ip_filters
,
1652 sizeof(*efx
->rps_flow_id
),
1654 if (!efx
->rps_flow_id
) {
1655 efx
->type
->filter_table_remove(efx
);
1664 static void efx_remove_filters(struct efx_nic
*efx
)
1666 #ifdef CONFIG_RFS_ACCEL
1667 kfree(efx
->rps_flow_id
);
1669 efx
->type
->filter_table_remove(efx
);
1672 static void efx_restore_filters(struct efx_nic
*efx
)
1674 efx
->type
->filter_table_restore(efx
);
1677 /**************************************************************************
1679 * NIC startup/shutdown
1681 *************************************************************************/
1683 static int efx_probe_all(struct efx_nic
*efx
)
1687 rc
= efx_probe_nic(efx
);
1689 netif_err(efx
, probe
, efx
->net_dev
, "failed to create NIC\n");
1693 rc
= efx_probe_port(efx
);
1695 netif_err(efx
, probe
, efx
->net_dev
, "failed to create port\n");
1699 BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE
< EFX_RXQ_MIN_ENT
);
1700 if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE
< EFX_TXQ_MIN_ENT(efx
))) {
1704 efx
->rxq_entries
= efx
->txq_entries
= EFX_DEFAULT_DMAQ_SIZE
;
1706 rc
= efx_probe_filters(efx
);
1708 netif_err(efx
, probe
, efx
->net_dev
,
1709 "failed to create filter tables\n");
1713 rc
= efx_probe_channels(efx
);
1720 efx_remove_filters(efx
);
1722 efx_remove_port(efx
);
1724 efx_remove_nic(efx
);
1729 /* If the interface is supposed to be running but is not, start
1730 * the hardware and software data path, regular activity for the port
1731 * (MAC statistics, link polling, etc.) and schedule the port to be
1732 * reconfigured. Interrupts must already be enabled. This function
1733 * is safe to call multiple times, so long as the NIC is not disabled.
1734 * Requires the RTNL lock.
1736 static void efx_start_all(struct efx_nic
*efx
)
1738 EFX_ASSERT_RESET_SERIALISED(efx
);
1739 BUG_ON(efx
->state
== STATE_DISABLED
);
1741 /* Check that it is appropriate to restart the interface. All
1742 * of these flags are safe to read under just the rtnl lock */
1743 if (efx
->port_enabled
|| !netif_running(efx
->net_dev
) ||
1747 efx_start_port(efx
);
1748 efx_start_datapath(efx
);
1750 /* Start the hardware monitor if there is one */
1751 if (efx
->type
->monitor
!= NULL
)
1752 queue_delayed_work(efx
->workqueue
, &efx
->monitor_work
,
1753 efx_monitor_interval
);
1755 /* If link state detection is normally event-driven, we have
1756 * to poll now because we could have missed a change
1758 if (efx_nic_rev(efx
) >= EFX_REV_SIENA_A0
) {
1759 mutex_lock(&efx
->mac_lock
);
1760 if (efx
->phy_op
->poll(efx
))
1761 efx_link_status_changed(efx
);
1762 mutex_unlock(&efx
->mac_lock
);
1765 efx
->type
->start_stats(efx
);
1766 efx
->type
->pull_stats(efx
);
1767 spin_lock_bh(&efx
->stats_lock
);
1768 efx
->type
->update_stats(efx
, NULL
, NULL
);
1769 spin_unlock_bh(&efx
->stats_lock
);
1772 /* Quiesce the hardware and software data path, and regular activity
1773 * for the port without bringing the link down. Safe to call multiple
1774 * times with the NIC in almost any state, but interrupts should be
1775 * enabled. Requires the RTNL lock.
1777 static void efx_stop_all(struct efx_nic
*efx
)
1779 EFX_ASSERT_RESET_SERIALISED(efx
);
1781 /* port_enabled can be read safely under the rtnl lock */
1782 if (!efx
->port_enabled
)
1785 /* update stats before we go down so we can accurately count
1788 efx
->type
->pull_stats(efx
);
1789 spin_lock_bh(&efx
->stats_lock
);
1790 efx
->type
->update_stats(efx
, NULL
, NULL
);
1791 spin_unlock_bh(&efx
->stats_lock
);
1792 efx
->type
->stop_stats(efx
);
1795 /* Stop the kernel transmit interface. This is only valid if
1796 * the device is stopped or detached; otherwise the watchdog
1797 * may fire immediately.
1799 WARN_ON(netif_running(efx
->net_dev
) &&
1800 netif_device_present(efx
->net_dev
));
1801 netif_tx_disable(efx
->net_dev
);
1803 efx_stop_datapath(efx
);
1806 static void efx_remove_all(struct efx_nic
*efx
)
1808 efx_remove_channels(efx
);
1809 efx_remove_filters(efx
);
1810 efx_remove_port(efx
);
1811 efx_remove_nic(efx
);
1814 /**************************************************************************
1816 * Interrupt moderation
1818 **************************************************************************/
1820 static unsigned int irq_mod_ticks(unsigned int usecs
, unsigned int quantum_ns
)
1824 if (usecs
* 1000 < quantum_ns
)
1825 return 1; /* never round down to 0 */
1826 return usecs
* 1000 / quantum_ns
;
1829 /* Set interrupt moderation parameters */
1830 int efx_init_irq_moderation(struct efx_nic
*efx
, unsigned int tx_usecs
,
1831 unsigned int rx_usecs
, bool rx_adaptive
,
1832 bool rx_may_override_tx
)
1834 struct efx_channel
*channel
;
1835 unsigned int irq_mod_max
= DIV_ROUND_UP(efx
->type
->timer_period_max
*
1836 efx
->timer_quantum_ns
,
1838 unsigned int tx_ticks
;
1839 unsigned int rx_ticks
;
1841 EFX_ASSERT_RESET_SERIALISED(efx
);
1843 if (tx_usecs
> irq_mod_max
|| rx_usecs
> irq_mod_max
)
1846 tx_ticks
= irq_mod_ticks(tx_usecs
, efx
->timer_quantum_ns
);
1847 rx_ticks
= irq_mod_ticks(rx_usecs
, efx
->timer_quantum_ns
);
1849 if (tx_ticks
!= rx_ticks
&& efx
->tx_channel_offset
== 0 &&
1850 !rx_may_override_tx
) {
1851 netif_err(efx
, drv
, efx
->net_dev
, "Channels are shared. "
1852 "RX and TX IRQ moderation must be equal\n");
1856 efx
->irq_rx_adaptive
= rx_adaptive
;
1857 efx
->irq_rx_moderation
= rx_ticks
;
1858 efx_for_each_channel(channel
, efx
) {
1859 if (efx_channel_has_rx_queue(channel
))
1860 channel
->irq_moderation
= rx_ticks
;
1861 else if (efx_channel_has_tx_queues(channel
))
1862 channel
->irq_moderation
= tx_ticks
;
1868 void efx_get_irq_moderation(struct efx_nic
*efx
, unsigned int *tx_usecs
,
1869 unsigned int *rx_usecs
, bool *rx_adaptive
)
1871 /* We must round up when converting ticks to microseconds
1872 * because we round down when converting the other way.
1875 *rx_adaptive
= efx
->irq_rx_adaptive
;
1876 *rx_usecs
= DIV_ROUND_UP(efx
->irq_rx_moderation
*
1877 efx
->timer_quantum_ns
,
1880 /* If channels are shared between RX and TX, so is IRQ
1881 * moderation. Otherwise, IRQ moderation is the same for all
1882 * TX channels and is not adaptive.
1884 if (efx
->tx_channel_offset
== 0)
1885 *tx_usecs
= *rx_usecs
;
1887 *tx_usecs
= DIV_ROUND_UP(
1888 efx
->channel
[efx
->tx_channel_offset
]->irq_moderation
*
1889 efx
->timer_quantum_ns
,
1893 /**************************************************************************
1897 **************************************************************************/
1899 /* Run periodically off the general workqueue */
1900 static void efx_monitor(struct work_struct
*data
)
1902 struct efx_nic
*efx
= container_of(data
, struct efx_nic
,
1905 netif_vdbg(efx
, timer
, efx
->net_dev
,
1906 "hardware monitor executing on CPU %d\n",
1907 raw_smp_processor_id());
1908 BUG_ON(efx
->type
->monitor
== NULL
);
1910 /* If the mac_lock is already held then it is likely a port
1911 * reconfiguration is already in place, which will likely do
1912 * most of the work of monitor() anyway. */
1913 if (mutex_trylock(&efx
->mac_lock
)) {
1914 if (efx
->port_enabled
)
1915 efx
->type
->monitor(efx
);
1916 mutex_unlock(&efx
->mac_lock
);
1919 queue_delayed_work(efx
->workqueue
, &efx
->monitor_work
,
1920 efx_monitor_interval
);
1923 /**************************************************************************
1927 *************************************************************************/
1930 * Context: process, rtnl_lock() held.
1932 static int efx_ioctl(struct net_device
*net_dev
, struct ifreq
*ifr
, int cmd
)
1934 struct efx_nic
*efx
= netdev_priv(net_dev
);
1935 struct mii_ioctl_data
*data
= if_mii(ifr
);
1937 if (cmd
== SIOCSHWTSTAMP
)
1938 return efx_ptp_set_ts_config(efx
, ifr
);
1939 if (cmd
== SIOCGHWTSTAMP
)
1940 return efx_ptp_get_ts_config(efx
, ifr
);
1942 /* Convert phy_id from older PRTAD/DEVAD format */
1943 if ((cmd
== SIOCGMIIREG
|| cmd
== SIOCSMIIREG
) &&
1944 (data
->phy_id
& 0xfc00) == 0x0400)
1945 data
->phy_id
^= MDIO_PHY_ID_C45
| 0x0400;
1947 return mdio_mii_ioctl(&efx
->mdio
, data
, cmd
);
1950 /**************************************************************************
1954 **************************************************************************/
1956 static void efx_init_napi_channel(struct efx_channel
*channel
)
1958 struct efx_nic
*efx
= channel
->efx
;
1960 channel
->napi_dev
= efx
->net_dev
;
1961 netif_napi_add(channel
->napi_dev
, &channel
->napi_str
,
1962 efx_poll
, napi_weight
);
1965 static void efx_init_napi(struct efx_nic
*efx
)
1967 struct efx_channel
*channel
;
1969 efx_for_each_channel(channel
, efx
)
1970 efx_init_napi_channel(channel
);
1973 static void efx_fini_napi_channel(struct efx_channel
*channel
)
1975 if (channel
->napi_dev
)
1976 netif_napi_del(&channel
->napi_str
);
1977 channel
->napi_dev
= NULL
;
1980 static void efx_fini_napi(struct efx_nic
*efx
)
1982 struct efx_channel
*channel
;
1984 efx_for_each_channel(channel
, efx
)
1985 efx_fini_napi_channel(channel
);
1988 /**************************************************************************
1990 * Kernel netpoll interface
1992 *************************************************************************/
1994 #ifdef CONFIG_NET_POLL_CONTROLLER
1996 /* Although in the common case interrupts will be disabled, this is not
1997 * guaranteed. However, all our work happens inside the NAPI callback,
1998 * so no locking is required.
2000 static void efx_netpoll(struct net_device
*net_dev
)
2002 struct efx_nic
*efx
= netdev_priv(net_dev
);
2003 struct efx_channel
*channel
;
2005 efx_for_each_channel(channel
, efx
)
2006 efx_schedule_channel(channel
);
2011 /**************************************************************************
2013 * Kernel net device interface
2015 *************************************************************************/
2017 /* Context: process, rtnl_lock() held. */
2018 static int efx_net_open(struct net_device
*net_dev
)
2020 struct efx_nic
*efx
= netdev_priv(net_dev
);
2023 netif_dbg(efx
, ifup
, efx
->net_dev
, "opening device on CPU %d\n",
2024 raw_smp_processor_id());
2026 rc
= efx_check_disabled(efx
);
2029 if (efx
->phy_mode
& PHY_MODE_SPECIAL
)
2031 if (efx_mcdi_poll_reboot(efx
) && efx_reset(efx
, RESET_TYPE_ALL
))
2034 /* Notify the kernel of the link state polled during driver load,
2035 * before the monitor starts running */
2036 efx_link_status_changed(efx
);
2039 efx_selftest_async_start(efx
);
2043 /* Context: process, rtnl_lock() held.
2044 * Note that the kernel will ignore our return code; this method
2045 * should really be a void.
2047 static int efx_net_stop(struct net_device
*net_dev
)
2049 struct efx_nic
*efx
= netdev_priv(net_dev
);
2051 netif_dbg(efx
, ifdown
, efx
->net_dev
, "closing on CPU %d\n",
2052 raw_smp_processor_id());
2054 /* Stop the device and flush all the channels */
2060 /* Context: process, dev_base_lock or RTNL held, non-blocking. */
2061 static struct rtnl_link_stats64
*efx_net_stats(struct net_device
*net_dev
,
2062 struct rtnl_link_stats64
*stats
)
2064 struct efx_nic
*efx
= netdev_priv(net_dev
);
2066 spin_lock_bh(&efx
->stats_lock
);
2067 efx
->type
->update_stats(efx
, NULL
, stats
);
2068 spin_unlock_bh(&efx
->stats_lock
);
2073 /* Context: netif_tx_lock held, BHs disabled. */
2074 static void efx_watchdog(struct net_device
*net_dev
)
2076 struct efx_nic
*efx
= netdev_priv(net_dev
);
2078 netif_err(efx
, tx_err
, efx
->net_dev
,
2079 "TX stuck with port_enabled=%d: resetting channels\n",
2082 efx_schedule_reset(efx
, RESET_TYPE_TX_WATCHDOG
);
2086 /* Context: process, rtnl_lock() held. */
2087 static int efx_change_mtu(struct net_device
*net_dev
, int new_mtu
)
2089 struct efx_nic
*efx
= netdev_priv(net_dev
);
2092 rc
= efx_check_disabled(efx
);
2095 if (new_mtu
> EFX_MAX_MTU
)
2098 netif_dbg(efx
, drv
, efx
->net_dev
, "changing MTU to %d\n", new_mtu
);
2100 efx_device_detach_sync(efx
);
2103 mutex_lock(&efx
->mac_lock
);
2104 net_dev
->mtu
= new_mtu
;
2105 efx
->type
->reconfigure_mac(efx
);
2106 mutex_unlock(&efx
->mac_lock
);
2109 netif_device_attach(efx
->net_dev
);
2113 static int efx_set_mac_address(struct net_device
*net_dev
, void *data
)
2115 struct efx_nic
*efx
= netdev_priv(net_dev
);
2116 struct sockaddr
*addr
= data
;
2117 u8
*new_addr
= addr
->sa_data
;
2119 if (!is_valid_ether_addr(new_addr
)) {
2120 netif_err(efx
, drv
, efx
->net_dev
,
2121 "invalid ethernet MAC address requested: %pM\n",
2123 return -EADDRNOTAVAIL
;
2126 ether_addr_copy(net_dev
->dev_addr
, new_addr
);
2127 efx_sriov_mac_address_changed(efx
);
2129 /* Reconfigure the MAC */
2130 mutex_lock(&efx
->mac_lock
);
2131 efx
->type
->reconfigure_mac(efx
);
2132 mutex_unlock(&efx
->mac_lock
);
2137 /* Context: netif_addr_lock held, BHs disabled. */
2138 static void efx_set_rx_mode(struct net_device
*net_dev
)
2140 struct efx_nic
*efx
= netdev_priv(net_dev
);
2142 if (efx
->port_enabled
)
2143 queue_work(efx
->workqueue
, &efx
->mac_work
);
2144 /* Otherwise efx_start_port() will do this */
2147 static int efx_set_features(struct net_device
*net_dev
, netdev_features_t data
)
2149 struct efx_nic
*efx
= netdev_priv(net_dev
);
2151 /* If disabling RX n-tuple filtering, clear existing filters */
2152 if (net_dev
->features
& ~data
& NETIF_F_NTUPLE
)
2153 return efx
->type
->filter_clear_rx(efx
, EFX_FILTER_PRI_MANUAL
);
2158 static const struct net_device_ops efx_farch_netdev_ops
= {
2159 .ndo_open
= efx_net_open
,
2160 .ndo_stop
= efx_net_stop
,
2161 .ndo_get_stats64
= efx_net_stats
,
2162 .ndo_tx_timeout
= efx_watchdog
,
2163 .ndo_start_xmit
= efx_hard_start_xmit
,
2164 .ndo_validate_addr
= eth_validate_addr
,
2165 .ndo_do_ioctl
= efx_ioctl
,
2166 .ndo_change_mtu
= efx_change_mtu
,
2167 .ndo_set_mac_address
= efx_set_mac_address
,
2168 .ndo_set_rx_mode
= efx_set_rx_mode
,
2169 .ndo_set_features
= efx_set_features
,
2170 #ifdef CONFIG_SFC_SRIOV
2171 .ndo_set_vf_mac
= efx_sriov_set_vf_mac
,
2172 .ndo_set_vf_vlan
= efx_sriov_set_vf_vlan
,
2173 .ndo_set_vf_spoofchk
= efx_sriov_set_vf_spoofchk
,
2174 .ndo_get_vf_config
= efx_sriov_get_vf_config
,
2176 #ifdef CONFIG_NET_POLL_CONTROLLER
2177 .ndo_poll_controller
= efx_netpoll
,
2179 .ndo_setup_tc
= efx_setup_tc
,
2180 #ifdef CONFIG_RFS_ACCEL
2181 .ndo_rx_flow_steer
= efx_filter_rfs
,
2185 static const struct net_device_ops efx_ef10_netdev_ops
= {
2186 .ndo_open
= efx_net_open
,
2187 .ndo_stop
= efx_net_stop
,
2188 .ndo_get_stats64
= efx_net_stats
,
2189 .ndo_tx_timeout
= efx_watchdog
,
2190 .ndo_start_xmit
= efx_hard_start_xmit
,
2191 .ndo_validate_addr
= eth_validate_addr
,
2192 .ndo_do_ioctl
= efx_ioctl
,
2193 .ndo_change_mtu
= efx_change_mtu
,
2194 .ndo_set_mac_address
= efx_set_mac_address
,
2195 .ndo_set_rx_mode
= efx_set_rx_mode
,
2196 .ndo_set_features
= efx_set_features
,
2197 #ifdef CONFIG_NET_POLL_CONTROLLER
2198 .ndo_poll_controller
= efx_netpoll
,
2200 #ifdef CONFIG_RFS_ACCEL
2201 .ndo_rx_flow_steer
= efx_filter_rfs
,
2205 static void efx_update_name(struct efx_nic
*efx
)
2207 strcpy(efx
->name
, efx
->net_dev
->name
);
2208 efx_mtd_rename(efx
);
2209 efx_set_channel_names(efx
);
2212 static int efx_netdev_event(struct notifier_block
*this,
2213 unsigned long event
, void *ptr
)
2215 struct net_device
*net_dev
= netdev_notifier_info_to_dev(ptr
);
2217 if ((net_dev
->netdev_ops
== &efx_farch_netdev_ops
||
2218 net_dev
->netdev_ops
== &efx_ef10_netdev_ops
) &&
2219 event
== NETDEV_CHANGENAME
)
2220 efx_update_name(netdev_priv(net_dev
));
2225 static struct notifier_block efx_netdev_notifier
= {
2226 .notifier_call
= efx_netdev_event
,
2230 show_phy_type(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
2232 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
2233 return sprintf(buf
, "%d\n", efx
->phy_type
);
2235 static DEVICE_ATTR(phy_type
, 0444, show_phy_type
, NULL
);
2237 static int efx_register_netdev(struct efx_nic
*efx
)
2239 struct net_device
*net_dev
= efx
->net_dev
;
2240 struct efx_channel
*channel
;
2243 net_dev
->watchdog_timeo
= 5 * HZ
;
2244 net_dev
->irq
= efx
->pci_dev
->irq
;
2245 if (efx_nic_rev(efx
) >= EFX_REV_HUNT_A0
) {
2246 net_dev
->netdev_ops
= &efx_ef10_netdev_ops
;
2247 net_dev
->priv_flags
|= IFF_UNICAST_FLT
;
2249 net_dev
->netdev_ops
= &efx_farch_netdev_ops
;
2251 SET_ETHTOOL_OPS(net_dev
, &efx_ethtool_ops
);
2252 net_dev
->gso_max_segs
= EFX_TSO_MAX_SEGS
;
2256 /* Enable resets to be scheduled and check whether any were
2257 * already requested. If so, the NIC is probably hosed so we
2260 efx
->state
= STATE_READY
;
2261 smp_mb(); /* ensure we change state before checking reset_pending */
2262 if (efx
->reset_pending
) {
2263 netif_err(efx
, probe
, efx
->net_dev
,
2264 "aborting probe due to scheduled reset\n");
2269 rc
= dev_alloc_name(net_dev
, net_dev
->name
);
2272 efx_update_name(efx
);
2274 /* Always start with carrier off; PHY events will detect the link */
2275 netif_carrier_off(net_dev
);
2277 rc
= register_netdevice(net_dev
);
2281 efx_for_each_channel(channel
, efx
) {
2282 struct efx_tx_queue
*tx_queue
;
2283 efx_for_each_channel_tx_queue(tx_queue
, channel
)
2284 efx_init_tx_queue_core_txq(tx_queue
);
2291 rc
= device_create_file(&efx
->pci_dev
->dev
, &dev_attr_phy_type
);
2293 netif_err(efx
, drv
, efx
->net_dev
,
2294 "failed to init net dev attributes\n");
2295 goto fail_registered
;
2302 efx_dissociate(efx
);
2303 unregister_netdevice(net_dev
);
2305 efx
->state
= STATE_UNINIT
;
2307 netif_err(efx
, drv
, efx
->net_dev
, "could not register net dev\n");
2311 static void efx_unregister_netdev(struct efx_nic
*efx
)
2316 BUG_ON(netdev_priv(efx
->net_dev
) != efx
);
2318 strlcpy(efx
->name
, pci_name(efx
->pci_dev
), sizeof(efx
->name
));
2319 device_remove_file(&efx
->pci_dev
->dev
, &dev_attr_phy_type
);
2322 unregister_netdevice(efx
->net_dev
);
2323 efx
->state
= STATE_UNINIT
;
2327 /**************************************************************************
2329 * Device reset and suspend
2331 **************************************************************************/
2333 /* Tears down the entire software state and most of the hardware state
2335 void efx_reset_down(struct efx_nic
*efx
, enum reset_type method
)
2337 EFX_ASSERT_RESET_SERIALISED(efx
);
2339 if (method
== RESET_TYPE_MCDI_TIMEOUT
)
2340 efx
->type
->prepare_flr(efx
);
2343 efx_disable_interrupts(efx
);
2345 mutex_lock(&efx
->mac_lock
);
2346 if (efx
->port_initialized
&& method
!= RESET_TYPE_INVISIBLE
)
2347 efx
->phy_op
->fini(efx
);
2348 efx
->type
->fini(efx
);
2351 /* This function will always ensure that the locks acquired in
2352 * efx_reset_down() are released. A failure return code indicates
2353 * that we were unable to reinitialise the hardware, and the
2354 * driver should be disabled. If ok is false, then the rx and tx
2355 * engines are not restarted, pending a RESET_DISABLE. */
2356 int efx_reset_up(struct efx_nic
*efx
, enum reset_type method
, bool ok
)
2360 EFX_ASSERT_RESET_SERIALISED(efx
);
2362 if (method
== RESET_TYPE_MCDI_TIMEOUT
)
2363 efx
->type
->finish_flr(efx
);
2365 /* Ensure that SRAM is initialised even if we're disabling the device */
2366 rc
= efx
->type
->init(efx
);
2368 netif_err(efx
, drv
, efx
->net_dev
, "failed to initialise NIC\n");
2375 if (efx
->port_initialized
&& method
!= RESET_TYPE_INVISIBLE
) {
2376 rc
= efx
->phy_op
->init(efx
);
2379 if (efx
->phy_op
->reconfigure(efx
))
2380 netif_err(efx
, drv
, efx
->net_dev
,
2381 "could not restore PHY settings\n");
2384 rc
= efx_enable_interrupts(efx
);
2387 efx_restore_filters(efx
);
2388 efx_sriov_reset(efx
);
2390 mutex_unlock(&efx
->mac_lock
);
2397 efx
->port_initialized
= false;
2399 mutex_unlock(&efx
->mac_lock
);
2404 /* Reset the NIC using the specified method. Note that the reset may
2405 * fail, in which case the card will be left in an unusable state.
2407 * Caller must hold the rtnl_lock.
2409 int efx_reset(struct efx_nic
*efx
, enum reset_type method
)
2414 netif_info(efx
, drv
, efx
->net_dev
, "resetting (%s)\n",
2415 RESET_TYPE(method
));
2417 efx_device_detach_sync(efx
);
2418 efx_reset_down(efx
, method
);
2420 rc
= efx
->type
->reset(efx
, method
);
2422 netif_err(efx
, drv
, efx
->net_dev
, "failed to reset hardware\n");
2426 /* Clear flags for the scopes we covered. We assume the NIC and
2427 * driver are now quiescent so that there is no race here.
2429 if (method
< RESET_TYPE_MAX_METHOD
)
2430 efx
->reset_pending
&= -(1 << (method
+ 1));
2431 else /* it doesn't fit into the well-ordered scope hierarchy */
2432 __clear_bit(method
, &efx
->reset_pending
);
2434 /* Reinitialise bus-mastering, which may have been turned off before
2435 * the reset was scheduled. This is still appropriate, even in the
2436 * RESET_TYPE_DISABLE since this driver generally assumes the hardware
2437 * can respond to requests. */
2438 pci_set_master(efx
->pci_dev
);
2441 /* Leave device stopped if necessary */
2443 method
== RESET_TYPE_DISABLE
||
2444 method
== RESET_TYPE_RECOVER_OR_DISABLE
;
2445 rc2
= efx_reset_up(efx
, method
, !disabled
);
2453 dev_close(efx
->net_dev
);
2454 netif_err(efx
, drv
, efx
->net_dev
, "has been disabled\n");
2455 efx
->state
= STATE_DISABLED
;
2457 netif_dbg(efx
, drv
, efx
->net_dev
, "reset complete\n");
2458 netif_device_attach(efx
->net_dev
);
2463 /* Try recovery mechanisms.
2464 * For now only EEH is supported.
2465 * Returns 0 if the recovery mechanisms are unsuccessful.
2466 * Returns a non-zero value otherwise.
2468 int efx_try_recovery(struct efx_nic
*efx
)
2471 /* A PCI error can occur and not be seen by EEH because nothing
2472 * happens on the PCI bus. In this case the driver may fail and
2473 * schedule a 'recover or reset', leading to this recovery handler.
2474 * Manually call the eeh failure check function.
2476 struct eeh_dev
*eehdev
=
2477 of_node_to_eeh_dev(pci_device_to_OF_node(efx
->pci_dev
));
2479 if (eeh_dev_check_failure(eehdev
)) {
2480 /* The EEH mechanisms will handle the error and reset the
2481 * device if necessary.
2489 static void efx_wait_for_bist_end(struct efx_nic
*efx
)
2493 for (i
= 0; i
< BIST_WAIT_DELAY_COUNT
; ++i
) {
2494 if (efx_mcdi_poll_reboot(efx
))
2496 msleep(BIST_WAIT_DELAY_MS
);
2499 netif_err(efx
, drv
, efx
->net_dev
, "Warning: No MC reboot after BIST mode\n");
2501 /* Either way unset the BIST flag. If we found no reboot we probably
2502 * won't recover, but we should try.
2504 efx
->mc_bist_for_other_fn
= false;
2507 /* The worker thread exists so that code that cannot sleep can
2508 * schedule a reset for later.
2510 static void efx_reset_work(struct work_struct
*data
)
2512 struct efx_nic
*efx
= container_of(data
, struct efx_nic
, reset_work
);
2513 unsigned long pending
;
2514 enum reset_type method
;
2516 pending
= ACCESS_ONCE(efx
->reset_pending
);
2517 method
= fls(pending
) - 1;
2519 if (method
== RESET_TYPE_MC_BIST
)
2520 efx_wait_for_bist_end(efx
);
2522 if ((method
== RESET_TYPE_RECOVER_OR_DISABLE
||
2523 method
== RESET_TYPE_RECOVER_OR_ALL
) &&
2524 efx_try_recovery(efx
))
2532 /* We checked the state in efx_schedule_reset() but it may
2533 * have changed by now. Now that we have the RTNL lock,
2534 * it cannot change again.
2536 if (efx
->state
== STATE_READY
)
2537 (void)efx_reset(efx
, method
);
2542 void efx_schedule_reset(struct efx_nic
*efx
, enum reset_type type
)
2544 enum reset_type method
;
2546 if (efx
->state
== STATE_RECOVERY
) {
2547 netif_dbg(efx
, drv
, efx
->net_dev
,
2548 "recovering: skip scheduling %s reset\n",
2554 case RESET_TYPE_INVISIBLE
:
2555 case RESET_TYPE_ALL
:
2556 case RESET_TYPE_RECOVER_OR_ALL
:
2557 case RESET_TYPE_WORLD
:
2558 case RESET_TYPE_DISABLE
:
2559 case RESET_TYPE_RECOVER_OR_DISABLE
:
2560 case RESET_TYPE_MC_BIST
:
2561 case RESET_TYPE_MCDI_TIMEOUT
:
2563 netif_dbg(efx
, drv
, efx
->net_dev
, "scheduling %s reset\n",
2564 RESET_TYPE(method
));
2567 method
= efx
->type
->map_reset_reason(type
);
2568 netif_dbg(efx
, drv
, efx
->net_dev
,
2569 "scheduling %s reset for %s\n",
2570 RESET_TYPE(method
), RESET_TYPE(type
));
2574 set_bit(method
, &efx
->reset_pending
);
2575 smp_mb(); /* ensure we change reset_pending before checking state */
2577 /* If we're not READY then just leave the flags set as the cue
2578 * to abort probing or reschedule the reset later.
2580 if (ACCESS_ONCE(efx
->state
) != STATE_READY
)
2583 /* efx_process_channel() will no longer read events once a
2584 * reset is scheduled. So switch back to poll'd MCDI completions. */
2585 efx_mcdi_mode_poll(efx
);
2587 queue_work(reset_workqueue
, &efx
->reset_work
);
2590 /**************************************************************************
2592 * List of NICs we support
2594 **************************************************************************/
2596 /* PCI device ID table */
2597 static DEFINE_PCI_DEVICE_TABLE(efx_pci_table
) = {
2598 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
,
2599 PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0
),
2600 .driver_data
= (unsigned long) &falcon_a1_nic_type
},
2601 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
,
2602 PCI_DEVICE_ID_SOLARFLARE_SFC4000B
),
2603 .driver_data
= (unsigned long) &falcon_b0_nic_type
},
2604 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0803), /* SFC9020 */
2605 .driver_data
= (unsigned long) &siena_a0_nic_type
},
2606 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0813), /* SFL9021 */
2607 .driver_data
= (unsigned long) &siena_a0_nic_type
},
2608 {PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE
, 0x0903), /* SFC9120 PF */
2609 .driver_data
= (unsigned long) &efx_hunt_a0_nic_type
},
2610 {0} /* end of list */
2613 /**************************************************************************
2615 * Dummy PHY/MAC operations
2617 * Can be used for some unimplemented operations
2618 * Needed so all function pointers are valid and do not have to be tested
2621 **************************************************************************/
2622 int efx_port_dummy_op_int(struct efx_nic
*efx
)
2626 void efx_port_dummy_op_void(struct efx_nic
*efx
) {}
2628 static bool efx_port_dummy_op_poll(struct efx_nic
*efx
)
2633 static const struct efx_phy_operations efx_dummy_phy_operations
= {
2634 .init
= efx_port_dummy_op_int
,
2635 .reconfigure
= efx_port_dummy_op_int
,
2636 .poll
= efx_port_dummy_op_poll
,
2637 .fini
= efx_port_dummy_op_void
,
2640 /**************************************************************************
2644 **************************************************************************/
2646 /* This zeroes out and then fills in the invariants in a struct
2647 * efx_nic (including all sub-structures).
2649 static int efx_init_struct(struct efx_nic
*efx
,
2650 struct pci_dev
*pci_dev
, struct net_device
*net_dev
)
2654 /* Initialise common structures */
2655 INIT_LIST_HEAD(&efx
->node
);
2656 INIT_LIST_HEAD(&efx
->secondary_list
);
2657 spin_lock_init(&efx
->biu_lock
);
2658 #ifdef CONFIG_SFC_MTD
2659 INIT_LIST_HEAD(&efx
->mtd_list
);
2661 INIT_WORK(&efx
->reset_work
, efx_reset_work
);
2662 INIT_DELAYED_WORK(&efx
->monitor_work
, efx_monitor
);
2663 INIT_DELAYED_WORK(&efx
->selftest_work
, efx_selftest_async_work
);
2664 efx
->pci_dev
= pci_dev
;
2665 efx
->msg_enable
= debug
;
2666 efx
->state
= STATE_UNINIT
;
2667 strlcpy(efx
->name
, pci_name(pci_dev
), sizeof(efx
->name
));
2669 efx
->net_dev
= net_dev
;
2670 efx
->rx_prefix_size
= efx
->type
->rx_prefix_size
;
2672 NET_IP_ALIGN
? (efx
->rx_prefix_size
+ NET_IP_ALIGN
) % 4 : 0;
2673 efx
->rx_packet_hash_offset
=
2674 efx
->type
->rx_hash_offset
- efx
->type
->rx_prefix_size
;
2675 efx
->rx_packet_ts_offset
=
2676 efx
->type
->rx_ts_offset
- efx
->type
->rx_prefix_size
;
2677 spin_lock_init(&efx
->stats_lock
);
2678 mutex_init(&efx
->mac_lock
);
2679 efx
->phy_op
= &efx_dummy_phy_operations
;
2680 efx
->mdio
.dev
= net_dev
;
2681 INIT_WORK(&efx
->mac_work
, efx_mac_work
);
2682 init_waitqueue_head(&efx
->flush_wq
);
2684 for (i
= 0; i
< EFX_MAX_CHANNELS
; i
++) {
2685 efx
->channel
[i
] = efx_alloc_channel(efx
, i
, NULL
);
2686 if (!efx
->channel
[i
])
2688 efx
->msi_context
[i
].efx
= efx
;
2689 efx
->msi_context
[i
].index
= i
;
2692 /* Higher numbered interrupt modes are less capable! */
2693 efx
->interrupt_mode
= max(efx
->type
->max_interrupt_mode
,
2696 /* Would be good to use the net_dev name, but we're too early */
2697 snprintf(efx
->workqueue_name
, sizeof(efx
->workqueue_name
), "sfc%s",
2699 efx
->workqueue
= create_singlethread_workqueue(efx
->workqueue_name
);
2700 if (!efx
->workqueue
)
2706 efx_fini_struct(efx
);
2710 static void efx_fini_struct(struct efx_nic
*efx
)
2714 for (i
= 0; i
< EFX_MAX_CHANNELS
; i
++)
2715 kfree(efx
->channel
[i
]);
2719 if (efx
->workqueue
) {
2720 destroy_workqueue(efx
->workqueue
);
2721 efx
->workqueue
= NULL
;
2725 /**************************************************************************
2729 **************************************************************************/
2731 /* Main body of final NIC shutdown code
2732 * This is called only at module unload (or hotplug removal).
2734 static void efx_pci_remove_main(struct efx_nic
*efx
)
2736 /* Flush reset_work. It can no longer be scheduled since we
2739 BUG_ON(efx
->state
== STATE_READY
);
2740 cancel_work_sync(&efx
->reset_work
);
2742 efx_disable_interrupts(efx
);
2743 efx_nic_fini_interrupt(efx
);
2745 efx
->type
->fini(efx
);
2747 efx_remove_all(efx
);
2750 /* Final NIC shutdown
2751 * This is called only at module unload (or hotplug removal).
2753 static void efx_pci_remove(struct pci_dev
*pci_dev
)
2755 struct efx_nic
*efx
;
2757 efx
= pci_get_drvdata(pci_dev
);
2761 /* Mark the NIC as fini, then stop the interface */
2763 efx_dissociate(efx
);
2764 dev_close(efx
->net_dev
);
2765 efx_disable_interrupts(efx
);
2768 efx_sriov_fini(efx
);
2769 efx_unregister_netdev(efx
);
2771 efx_mtd_remove(efx
);
2773 efx_pci_remove_main(efx
);
2776 netif_dbg(efx
, drv
, efx
->net_dev
, "shutdown successful\n");
2778 efx_fini_struct(efx
);
2779 free_netdev(efx
->net_dev
);
2781 pci_disable_pcie_error_reporting(pci_dev
);
2784 /* NIC VPD information
2785 * Called during probe to display the part number of the
2786 * installed NIC. VPD is potentially very large but this should
2787 * always appear within the first 512 bytes.
2789 #define SFC_VPD_LEN 512
2790 static void efx_probe_vpd_strings(struct efx_nic
*efx
)
2792 struct pci_dev
*dev
= efx
->pci_dev
;
2793 char vpd_data
[SFC_VPD_LEN
];
2795 int ro_start
, ro_size
, i
, j
;
2797 /* Get the vpd data from the device */
2798 vpd_size
= pci_read_vpd(dev
, 0, sizeof(vpd_data
), vpd_data
);
2799 if (vpd_size
<= 0) {
2800 netif_err(efx
, drv
, efx
->net_dev
, "Unable to read VPD\n");
2804 /* Get the Read only section */
2805 ro_start
= pci_vpd_find_tag(vpd_data
, 0, vpd_size
, PCI_VPD_LRDT_RO_DATA
);
2807 netif_err(efx
, drv
, efx
->net_dev
, "VPD Read-only not found\n");
2811 ro_size
= pci_vpd_lrdt_size(&vpd_data
[ro_start
]);
2813 i
= ro_start
+ PCI_VPD_LRDT_TAG_SIZE
;
2814 if (i
+ j
> vpd_size
)
2817 /* Get the Part number */
2818 i
= pci_vpd_find_info_keyword(vpd_data
, i
, j
, "PN");
2820 netif_err(efx
, drv
, efx
->net_dev
, "Part number not found\n");
2824 j
= pci_vpd_info_field_size(&vpd_data
[i
]);
2825 i
+= PCI_VPD_INFO_FLD_HDR_SIZE
;
2826 if (i
+ j
> vpd_size
) {
2827 netif_err(efx
, drv
, efx
->net_dev
, "Incomplete part number\n");
2831 netif_info(efx
, drv
, efx
->net_dev
,
2832 "Part Number : %.*s\n", j
, &vpd_data
[i
]);
2834 i
= ro_start
+ PCI_VPD_LRDT_TAG_SIZE
;
2836 i
= pci_vpd_find_info_keyword(vpd_data
, i
, j
, "SN");
2838 netif_err(efx
, drv
, efx
->net_dev
, "Serial number not found\n");
2842 j
= pci_vpd_info_field_size(&vpd_data
[i
]);
2843 i
+= PCI_VPD_INFO_FLD_HDR_SIZE
;
2844 if (i
+ j
> vpd_size
) {
2845 netif_err(efx
, drv
, efx
->net_dev
, "Incomplete serial number\n");
2849 efx
->vpd_sn
= kmalloc(j
+ 1, GFP_KERNEL
);
2853 snprintf(efx
->vpd_sn
, j
+ 1, "%s", &vpd_data
[i
]);
2857 /* Main body of NIC initialisation
2858 * This is called at module load (or hotplug insertion, theoretically).
2860 static int efx_pci_probe_main(struct efx_nic
*efx
)
2864 /* Do start-of-day initialisation */
2865 rc
= efx_probe_all(efx
);
2871 rc
= efx
->type
->init(efx
);
2873 netif_err(efx
, probe
, efx
->net_dev
,
2874 "failed to initialise NIC\n");
2878 rc
= efx_init_port(efx
);
2880 netif_err(efx
, probe
, efx
->net_dev
,
2881 "failed to initialise port\n");
2885 rc
= efx_nic_init_interrupt(efx
);
2888 rc
= efx_enable_interrupts(efx
);
2895 efx_nic_fini_interrupt(efx
);
2899 efx
->type
->fini(efx
);
2902 efx_remove_all(efx
);
2907 /* NIC initialisation
2909 * This is called at module load (or hotplug insertion,
2910 * theoretically). It sets up PCI mappings, resets the NIC,
2911 * sets up and registers the network devices with the kernel and hooks
2912 * the interrupt service routine. It does not prepare the device for
2913 * transmission; this is left to the first time one of the network
2914 * interfaces is brought up (i.e. efx_net_open).
2916 static int efx_pci_probe(struct pci_dev
*pci_dev
,
2917 const struct pci_device_id
*entry
)
2919 struct net_device
*net_dev
;
2920 struct efx_nic
*efx
;
2923 /* Allocate and initialise a struct net_device and struct efx_nic */
2924 net_dev
= alloc_etherdev_mqs(sizeof(*efx
), EFX_MAX_CORE_TX_QUEUES
,
2928 efx
= netdev_priv(net_dev
);
2929 efx
->type
= (const struct efx_nic_type
*) entry
->driver_data
;
2930 net_dev
->features
|= (efx
->type
->offload_features
| NETIF_F_SG
|
2931 NETIF_F_HIGHDMA
| NETIF_F_TSO
|
2933 if (efx
->type
->offload_features
& NETIF_F_V6_CSUM
)
2934 net_dev
->features
|= NETIF_F_TSO6
;
2935 /* Mask for features that also apply to VLAN devices */
2936 net_dev
->vlan_features
|= (NETIF_F_ALL_CSUM
| NETIF_F_SG
|
2937 NETIF_F_HIGHDMA
| NETIF_F_ALL_TSO
|
2939 /* All offloads can be toggled */
2940 net_dev
->hw_features
= net_dev
->features
& ~NETIF_F_HIGHDMA
;
2941 pci_set_drvdata(pci_dev
, efx
);
2942 SET_NETDEV_DEV(net_dev
, &pci_dev
->dev
);
2943 rc
= efx_init_struct(efx
, pci_dev
, net_dev
);
2947 netif_info(efx
, probe
, efx
->net_dev
,
2948 "Solarflare NIC detected\n");
2950 efx_probe_vpd_strings(efx
);
2952 /* Set up basic I/O (BAR mappings etc) */
2953 rc
= efx_init_io(efx
);
2957 rc
= efx_pci_probe_main(efx
);
2961 rc
= efx_register_netdev(efx
);
2965 rc
= efx_sriov_init(efx
);
2967 netif_err(efx
, probe
, efx
->net_dev
,
2968 "SR-IOV can't be enabled rc %d\n", rc
);
2970 netif_dbg(efx
, probe
, efx
->net_dev
, "initialisation successful\n");
2972 /* Try to create MTDs, but allow this to fail */
2974 rc
= efx_mtd_probe(efx
);
2977 netif_warn(efx
, probe
, efx
->net_dev
,
2978 "failed to create MTDs (%d)\n", rc
);
2980 rc
= pci_enable_pcie_error_reporting(pci_dev
);
2981 if (rc
&& rc
!= -EINVAL
)
2982 netif_warn(efx
, probe
, efx
->net_dev
,
2983 "pci_enable_pcie_error_reporting failed (%d)\n", rc
);
2988 efx_pci_remove_main(efx
);
2992 efx_fini_struct(efx
);
2995 netif_dbg(efx
, drv
, efx
->net_dev
, "initialisation failed. rc=%d\n", rc
);
2996 free_netdev(net_dev
);
3000 static int efx_pm_freeze(struct device
*dev
)
3002 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
3006 if (efx
->state
!= STATE_DISABLED
) {
3007 efx
->state
= STATE_UNINIT
;
3009 efx_device_detach_sync(efx
);
3012 efx_disable_interrupts(efx
);
3020 static int efx_pm_thaw(struct device
*dev
)
3023 struct efx_nic
*efx
= pci_get_drvdata(to_pci_dev(dev
));
3027 if (efx
->state
!= STATE_DISABLED
) {
3028 rc
= efx_enable_interrupts(efx
);
3032 mutex_lock(&efx
->mac_lock
);
3033 efx
->phy_op
->reconfigure(efx
);
3034 mutex_unlock(&efx
->mac_lock
);
3038 netif_device_attach(efx
->net_dev
);
3040 efx
->state
= STATE_READY
;
3042 efx
->type
->resume_wol(efx
);
3047 /* Reschedule any quenched resets scheduled during efx_pm_freeze() */
3048 queue_work(reset_workqueue
, &efx
->reset_work
);
3058 static int efx_pm_poweroff(struct device
*dev
)
3060 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
3061 struct efx_nic
*efx
= pci_get_drvdata(pci_dev
);
3063 efx
->type
->fini(efx
);
3065 efx
->reset_pending
= 0;
3067 pci_save_state(pci_dev
);
3068 return pci_set_power_state(pci_dev
, PCI_D3hot
);
3071 /* Used for both resume and restore */
3072 static int efx_pm_resume(struct device
*dev
)
3074 struct pci_dev
*pci_dev
= to_pci_dev(dev
);
3075 struct efx_nic
*efx
= pci_get_drvdata(pci_dev
);
3078 rc
= pci_set_power_state(pci_dev
, PCI_D0
);
3081 pci_restore_state(pci_dev
);
3082 rc
= pci_enable_device(pci_dev
);
3085 pci_set_master(efx
->pci_dev
);
3086 rc
= efx
->type
->reset(efx
, RESET_TYPE_ALL
);
3089 rc
= efx
->type
->init(efx
);
3092 rc
= efx_pm_thaw(dev
);
3096 static int efx_pm_suspend(struct device
*dev
)
3101 rc
= efx_pm_poweroff(dev
);
3107 static const struct dev_pm_ops efx_pm_ops
= {
3108 .suspend
= efx_pm_suspend
,
3109 .resume
= efx_pm_resume
,
3110 .freeze
= efx_pm_freeze
,
3111 .thaw
= efx_pm_thaw
,
3112 .poweroff
= efx_pm_poweroff
,
3113 .restore
= efx_pm_resume
,
3116 /* A PCI error affecting this device was detected.
3117 * At this point MMIO and DMA may be disabled.
3118 * Stop the software path and request a slot reset.
3120 static pci_ers_result_t
efx_io_error_detected(struct pci_dev
*pdev
,
3121 enum pci_channel_state state
)
3123 pci_ers_result_t status
= PCI_ERS_RESULT_RECOVERED
;
3124 struct efx_nic
*efx
= pci_get_drvdata(pdev
);
3126 if (state
== pci_channel_io_perm_failure
)
3127 return PCI_ERS_RESULT_DISCONNECT
;
3131 if (efx
->state
!= STATE_DISABLED
) {
3132 efx
->state
= STATE_RECOVERY
;
3133 efx
->reset_pending
= 0;
3135 efx_device_detach_sync(efx
);
3138 efx_disable_interrupts(efx
);
3140 status
= PCI_ERS_RESULT_NEED_RESET
;
3142 /* If the interface is disabled we don't want to do anything
3145 status
= PCI_ERS_RESULT_RECOVERED
;
3150 pci_disable_device(pdev
);
3155 /* Fake a successfull reset, which will be performed later in efx_io_resume. */
3156 static pci_ers_result_t
efx_io_slot_reset(struct pci_dev
*pdev
)
3158 struct efx_nic
*efx
= pci_get_drvdata(pdev
);
3159 pci_ers_result_t status
= PCI_ERS_RESULT_RECOVERED
;
3162 if (pci_enable_device(pdev
)) {
3163 netif_err(efx
, hw
, efx
->net_dev
,
3164 "Cannot re-enable PCI device after reset.\n");
3165 status
= PCI_ERS_RESULT_DISCONNECT
;
3168 rc
= pci_cleanup_aer_uncorrect_error_status(pdev
);
3170 netif_err(efx
, hw
, efx
->net_dev
,
3171 "pci_cleanup_aer_uncorrect_error_status failed (%d)\n", rc
);
3172 /* Non-fatal error. Continue. */
3178 /* Perform the actual reset and resume I/O operations. */
3179 static void efx_io_resume(struct pci_dev
*pdev
)
3181 struct efx_nic
*efx
= pci_get_drvdata(pdev
);
3186 if (efx
->state
== STATE_DISABLED
)
3189 rc
= efx_reset(efx
, RESET_TYPE_ALL
);
3191 netif_err(efx
, hw
, efx
->net_dev
,
3192 "efx_reset failed after PCI error (%d)\n", rc
);
3194 efx
->state
= STATE_READY
;
3195 netif_dbg(efx
, hw
, efx
->net_dev
,
3196 "Done resetting and resuming IO after PCI error.\n");
3203 /* For simplicity and reliability, we always require a slot reset and try to
3204 * reset the hardware when a pci error affecting the device is detected.
3205 * We leave both the link_reset and mmio_enabled callback unimplemented:
3206 * with our request for slot reset the mmio_enabled callback will never be
3207 * called, and the link_reset callback is not used by AER or EEH mechanisms.
3209 static struct pci_error_handlers efx_err_handlers
= {
3210 .error_detected
= efx_io_error_detected
,
3211 .slot_reset
= efx_io_slot_reset
,
3212 .resume
= efx_io_resume
,
3215 static struct pci_driver efx_pci_driver
= {
3216 .name
= KBUILD_MODNAME
,
3217 .id_table
= efx_pci_table
,
3218 .probe
= efx_pci_probe
,
3219 .remove
= efx_pci_remove
,
3220 .driver
.pm
= &efx_pm_ops
,
3221 .err_handler
= &efx_err_handlers
,
3224 /**************************************************************************
3226 * Kernel module interface
3228 *************************************************************************/
3230 module_param(interrupt_mode
, uint
, 0444);
3231 MODULE_PARM_DESC(interrupt_mode
,
3232 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
3234 static int __init
efx_init_module(void)
3238 printk(KERN_INFO
"Solarflare NET driver v" EFX_DRIVER_VERSION
"\n");
3240 rc
= register_netdevice_notifier(&efx_netdev_notifier
);
3244 rc
= efx_init_sriov();
3248 reset_workqueue
= create_singlethread_workqueue("sfc_reset");
3249 if (!reset_workqueue
) {
3254 rc
= pci_register_driver(&efx_pci_driver
);
3261 destroy_workqueue(reset_workqueue
);
3265 unregister_netdevice_notifier(&efx_netdev_notifier
);
3270 static void __exit
efx_exit_module(void)
3272 printk(KERN_INFO
"Solarflare NET driver unloading\n");
3274 pci_unregister_driver(&efx_pci_driver
);
3275 destroy_workqueue(reset_workqueue
);
3277 unregister_netdevice_notifier(&efx_netdev_notifier
);
3281 module_init(efx_init_module
);
3282 module_exit(efx_exit_module
);
3284 MODULE_AUTHOR("Solarflare Communications and "
3285 "Michael Brown <mbrown@fensystems.co.uk>");
3286 MODULE_DESCRIPTION("Solarflare network driver");
3287 MODULE_LICENSE("GPL");
3288 MODULE_DEVICE_TABLE(pci
, efx_pci_table
);