1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2006-2009 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/netdevice.h>
12 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/kernel_stat.h>
15 #include <linux/pci.h>
16 #include <linux/ethtool.h>
19 #include <linux/udp.h>
20 #include <linux/rtnetlink.h>
22 #include "net_driver.h"
26 #include "workarounds.h"
32 * Loopback test packet structure
34 * The self-test should stress every RSS vector, and unfortunately
35 * Falcon only performs RSS on TCP/UDP packets.
37 struct efx_loopback_payload
{
43 } __attribute__ ((packed
));
45 /* Loopback test source MAC address */
46 static const unsigned char payload_source
[ETH_ALEN
] = {
47 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b,
50 static const char payload_msg
[] =
51 "Hello world! This is an Efx loopback test in progress!";
54 * efx_loopback_state - persistent state during a loopback selftest
55 * @flush: Drop all packets in efx_loopback_rx_packet
56 * @packet_count: Number of packets being used in this test
57 * @skbs: An array of skbs transmitted
58 * @offload_csum: Checksums are being offloaded
59 * @rx_good: RX good packet count
60 * @rx_bad: RX bad packet count
61 * @payload: Payload used in tests
63 struct efx_loopback_state
{
66 struct sk_buff
**skbs
;
70 struct efx_loopback_payload payload
;
73 /**************************************************************************
75 * MII, NVRAM and register tests
77 **************************************************************************/
79 static int efx_test_mdio(struct efx_nic
*efx
, struct efx_self_tests
*tests
)
82 int devad
= __ffs(efx
->mdio
.mmds
);
85 if (efx
->phy_type
== PHY_TYPE_NONE
)
88 mutex_lock(&efx
->mac_lock
);
91 physid1
= efx_mdio_read(efx
, devad
, MDIO_DEVID1
);
92 physid2
= efx_mdio_read(efx
, devad
, MDIO_DEVID2
);
94 if ((physid1
== 0x0000) || (physid1
== 0xffff) ||
95 (physid2
== 0x0000) || (physid2
== 0xffff)) {
96 EFX_ERR(efx
, "no MDIO PHY present with ID %d\n",
102 if (EFX_IS10G(efx
)) {
103 rc
= efx_mdio_check_mmds(efx
, efx
->mdio
.mmds
, 0);
109 mutex_unlock(&efx
->mac_lock
);
110 tests
->mdio
= rc
? -1 : 1;
114 static int efx_test_nvram(struct efx_nic
*efx
, struct efx_self_tests
*tests
)
118 if (efx
->type
->test_nvram
) {
119 rc
= efx
->type
->test_nvram(efx
);
120 tests
->nvram
= rc
? -1 : 1;
126 static int efx_test_chip(struct efx_nic
*efx
, struct efx_self_tests
*tests
)
130 /* Test register access */
131 if (efx
->type
->test_registers
) {
132 rc
= efx
->type
->test_registers(efx
);
133 tests
->registers
= rc
? -1 : 1;
139 /**************************************************************************
141 * Interrupt and event queue testing
143 **************************************************************************/
145 /* Test generation and receipt of interrupts */
146 static int efx_test_interrupts(struct efx_nic
*efx
,
147 struct efx_self_tests
*tests
)
149 struct efx_channel
*channel
;
151 EFX_LOG(efx
, "testing interrupts\n");
152 tests
->interrupt
= -1;
154 /* Reset interrupt flag */
155 efx
->last_irq_cpu
= -1;
158 /* ACK each interrupting event queue. Receiving an interrupt due to
159 * traffic before a test event is raised is considered a pass */
160 efx_for_each_channel(channel
, efx
) {
161 if (channel
->work_pending
)
162 efx_process_channel_now(channel
);
163 if (efx
->last_irq_cpu
>= 0)
167 efx_nic_generate_interrupt(efx
);
169 /* Wait for arrival of test interrupt. */
170 EFX_LOG(efx
, "waiting for test interrupt\n");
171 schedule_timeout_uninterruptible(HZ
/ 10);
172 if (efx
->last_irq_cpu
>= 0)
175 EFX_ERR(efx
, "timed out waiting for interrupt\n");
179 EFX_LOG(efx
, "%s test interrupt seen on CPU%d\n", INT_MODE(efx
),
181 tests
->interrupt
= 1;
185 /* Test generation and receipt of interrupting events */
186 static int efx_test_eventq_irq(struct efx_channel
*channel
,
187 struct efx_self_tests
*tests
)
189 unsigned int magic
, count
;
191 /* Channel specific code, limited to 20 bits */
192 magic
= (0x00010150 + channel
->channel
);
193 EFX_LOG(channel
->efx
, "channel %d testing event queue with code %x\n",
194 channel
->channel
, magic
);
196 tests
->eventq_dma
[channel
->channel
] = -1;
197 tests
->eventq_int
[channel
->channel
] = -1;
198 tests
->eventq_poll
[channel
->channel
] = -1;
200 /* Reset flag and zero magic word */
201 channel
->efx
->last_irq_cpu
= -1;
202 channel
->eventq_magic
= 0;
205 efx_nic_generate_test_event(channel
, magic
);
207 /* Wait for arrival of interrupt */
210 schedule_timeout_uninterruptible(HZ
/ 100);
212 if (channel
->work_pending
)
213 efx_process_channel_now(channel
);
215 if (channel
->eventq_magic
== magic
)
217 } while (++count
< 2);
219 EFX_ERR(channel
->efx
, "channel %d timed out waiting for event queue\n",
222 /* See if interrupt arrived */
223 if (channel
->efx
->last_irq_cpu
>= 0) {
224 EFX_ERR(channel
->efx
, "channel %d saw interrupt on CPU%d "
225 "during event queue test\n", channel
->channel
,
226 raw_smp_processor_id());
227 tests
->eventq_int
[channel
->channel
] = 1;
230 /* Check to see if event was received even if interrupt wasn't */
231 efx_process_channel_now(channel
);
232 if (channel
->eventq_magic
== magic
) {
233 EFX_ERR(channel
->efx
, "channel %d event was generated, but "
234 "failed to trigger an interrupt\n", channel
->channel
);
235 tests
->eventq_dma
[channel
->channel
] = 1;
240 EFX_LOG(channel
->efx
, "channel %d event queue passed\n",
242 tests
->eventq_dma
[channel
->channel
] = 1;
243 tests
->eventq_int
[channel
->channel
] = 1;
244 tests
->eventq_poll
[channel
->channel
] = 1;
248 static int efx_test_phy(struct efx_nic
*efx
, struct efx_self_tests
*tests
,
253 if (!efx
->phy_op
->run_tests
)
256 mutex_lock(&efx
->mac_lock
);
257 rc
= efx
->phy_op
->run_tests(efx
, tests
->phy
, flags
);
258 mutex_unlock(&efx
->mac_lock
);
262 /**************************************************************************
265 * NB Only one loopback test can be executing concurrently.
267 **************************************************************************/
269 /* Loopback test RX callback
270 * This is called for each received packet during loopback testing.
272 void efx_loopback_rx_packet(struct efx_nic
*efx
,
273 const char *buf_ptr
, int pkt_len
)
275 struct efx_loopback_state
*state
= efx
->loopback_selftest
;
276 struct efx_loopback_payload
*received
;
277 struct efx_loopback_payload
*payload
;
281 /* If we are just flushing, then drop the packet */
282 if ((state
== NULL
) || state
->flush
)
285 payload
= &state
->payload
;
287 received
= (struct efx_loopback_payload
*) buf_ptr
;
288 received
->ip
.saddr
= payload
->ip
.saddr
;
289 if (state
->offload_csum
)
290 received
->ip
.check
= payload
->ip
.check
;
292 /* Check that header exists */
293 if (pkt_len
< sizeof(received
->header
)) {
294 EFX_ERR(efx
, "saw runt RX packet (length %d) in %s loopback "
295 "test\n", pkt_len
, LOOPBACK_MODE(efx
));
299 /* Check that the ethernet header exists */
300 if (memcmp(&received
->header
, &payload
->header
, ETH_HLEN
) != 0) {
301 EFX_ERR(efx
, "saw non-loopback RX packet in %s loopback test\n",
306 /* Check packet length */
307 if (pkt_len
!= sizeof(*payload
)) {
308 EFX_ERR(efx
, "saw incorrect RX packet length %d (wanted %d) in "
309 "%s loopback test\n", pkt_len
, (int)sizeof(*payload
),
314 /* Check that IP header matches */
315 if (memcmp(&received
->ip
, &payload
->ip
, sizeof(payload
->ip
)) != 0) {
316 EFX_ERR(efx
, "saw corrupted IP header in %s loopback test\n",
321 /* Check that msg and padding matches */
322 if (memcmp(&received
->msg
, &payload
->msg
, sizeof(received
->msg
)) != 0) {
323 EFX_ERR(efx
, "saw corrupted RX packet in %s loopback test\n",
328 /* Check that iteration matches */
329 if (received
->iteration
!= payload
->iteration
) {
330 EFX_ERR(efx
, "saw RX packet from iteration %d (wanted %d) in "
331 "%s loopback test\n", ntohs(received
->iteration
),
332 ntohs(payload
->iteration
), LOOPBACK_MODE(efx
));
336 /* Increase correct RX count */
337 EFX_TRACE(efx
, "got loopback RX in %s loopback test\n",
340 atomic_inc(&state
->rx_good
);
344 #ifdef EFX_ENABLE_DEBUG
345 if (atomic_read(&state
->rx_bad
) == 0) {
346 EFX_ERR(efx
, "received packet:\n");
347 print_hex_dump(KERN_ERR
, "", DUMP_PREFIX_OFFSET
, 0x10, 1,
348 buf_ptr
, pkt_len
, 0);
349 EFX_ERR(efx
, "expected packet:\n");
350 print_hex_dump(KERN_ERR
, "", DUMP_PREFIX_OFFSET
, 0x10, 1,
351 &state
->payload
, sizeof(state
->payload
), 0);
354 atomic_inc(&state
->rx_bad
);
357 /* Initialise an efx_selftest_state for a new iteration */
358 static void efx_iterate_state(struct efx_nic
*efx
)
360 struct efx_loopback_state
*state
= efx
->loopback_selftest
;
361 struct net_device
*net_dev
= efx
->net_dev
;
362 struct efx_loopback_payload
*payload
= &state
->payload
;
364 /* Initialise the layerII header */
365 memcpy(&payload
->header
.h_dest
, net_dev
->dev_addr
, ETH_ALEN
);
366 memcpy(&payload
->header
.h_source
, &payload_source
, ETH_ALEN
);
367 payload
->header
.h_proto
= htons(ETH_P_IP
);
369 /* saddr set later and used as incrementing count */
370 payload
->ip
.daddr
= htonl(INADDR_LOOPBACK
);
372 payload
->ip
.check
= htons(0xdead);
373 payload
->ip
.tot_len
= htons(sizeof(*payload
) - sizeof(struct ethhdr
));
374 payload
->ip
.version
= IPVERSION
;
375 payload
->ip
.protocol
= IPPROTO_UDP
;
377 /* Initialise udp header */
378 payload
->udp
.source
= 0;
379 payload
->udp
.len
= htons(sizeof(*payload
) - sizeof(struct ethhdr
) -
380 sizeof(struct iphdr
));
381 payload
->udp
.check
= 0; /* checksum ignored */
383 /* Fill out payload */
384 payload
->iteration
= htons(ntohs(payload
->iteration
) + 1);
385 memcpy(&payload
->msg
, payload_msg
, sizeof(payload_msg
));
387 /* Fill out remaining state members */
388 atomic_set(&state
->rx_good
, 0);
389 atomic_set(&state
->rx_bad
, 0);
393 static int efx_begin_loopback(struct efx_tx_queue
*tx_queue
)
395 struct efx_nic
*efx
= tx_queue
->efx
;
396 struct efx_loopback_state
*state
= efx
->loopback_selftest
;
397 struct efx_loopback_payload
*payload
;
402 /* Transmit N copies of buffer */
403 for (i
= 0; i
< state
->packet_count
; i
++) {
404 /* Allocate an skb, holding an extra reference for
405 * transmit completion counting */
406 skb
= alloc_skb(sizeof(state
->payload
), GFP_KERNEL
);
409 state
->skbs
[i
] = skb
;
412 /* Copy the payload in, incrementing the source address to
413 * exercise the rss vectors */
414 payload
= ((struct efx_loopback_payload
*)
415 skb_put(skb
, sizeof(state
->payload
)));
416 memcpy(payload
, &state
->payload
, sizeof(state
->payload
));
417 payload
->ip
.saddr
= htonl(INADDR_LOOPBACK
| (i
<< 2));
419 /* Ensure everything we've written is visible to the
420 * interrupt handler. */
423 if (efx_dev_registered(efx
))
424 netif_tx_lock_bh(efx
->net_dev
);
425 rc
= efx_enqueue_skb(tx_queue
, skb
);
426 if (efx_dev_registered(efx
))
427 netif_tx_unlock_bh(efx
->net_dev
);
429 if (rc
!= NETDEV_TX_OK
) {
430 EFX_ERR(efx
, "TX queue %d could not transmit packet %d "
431 "of %d in %s loopback test\n", tx_queue
->queue
,
432 i
+ 1, state
->packet_count
, LOOPBACK_MODE(efx
));
434 /* Defer cleaning up the other skbs for the caller */
443 static int efx_poll_loopback(struct efx_nic
*efx
)
445 struct efx_loopback_state
*state
= efx
->loopback_selftest
;
446 struct efx_channel
*channel
;
448 /* NAPI polling is not enabled, so process channels
450 efx_for_each_channel(channel
, efx
) {
451 if (channel
->work_pending
)
452 efx_process_channel_now(channel
);
454 return atomic_read(&state
->rx_good
) == state
->packet_count
;
457 static int efx_end_loopback(struct efx_tx_queue
*tx_queue
,
458 struct efx_loopback_self_tests
*lb_tests
)
460 struct efx_nic
*efx
= tx_queue
->efx
;
461 struct efx_loopback_state
*state
= efx
->loopback_selftest
;
463 int tx_done
= 0, rx_good
, rx_bad
;
466 if (efx_dev_registered(efx
))
467 netif_tx_lock_bh(efx
->net_dev
);
469 /* Count the number of tx completions, and decrement the refcnt. Any
470 * skbs not already completed will be free'd when the queue is flushed */
471 for (i
=0; i
< state
->packet_count
; i
++) {
472 skb
= state
->skbs
[i
];
473 if (skb
&& !skb_shared(skb
))
475 dev_kfree_skb_any(skb
);
478 if (efx_dev_registered(efx
))
479 netif_tx_unlock_bh(efx
->net_dev
);
481 /* Check TX completion and received packet counts */
482 rx_good
= atomic_read(&state
->rx_good
);
483 rx_bad
= atomic_read(&state
->rx_bad
);
484 if (tx_done
!= state
->packet_count
) {
485 /* Don't free the skbs; they will be picked up on TX
486 * overflow or channel teardown.
488 EFX_ERR(efx
, "TX queue %d saw only %d out of an expected %d "
489 "TX completion events in %s loopback test\n",
490 tx_queue
->queue
, tx_done
, state
->packet_count
,
493 /* Allow to fall through so we see the RX errors as well */
496 /* We may always be up to a flush away from our desired packet total */
497 if (rx_good
!= state
->packet_count
) {
498 EFX_LOG(efx
, "TX queue %d saw only %d out of an expected %d "
499 "received packets in %s loopback test\n",
500 tx_queue
->queue
, rx_good
, state
->packet_count
,
506 /* Update loopback test structure */
507 lb_tests
->tx_sent
[tx_queue
->queue
] += state
->packet_count
;
508 lb_tests
->tx_done
[tx_queue
->queue
] += tx_done
;
509 lb_tests
->rx_good
+= rx_good
;
510 lb_tests
->rx_bad
+= rx_bad
;
516 efx_test_loopback(struct efx_tx_queue
*tx_queue
,
517 struct efx_loopback_self_tests
*lb_tests
)
519 struct efx_nic
*efx
= tx_queue
->efx
;
520 struct efx_loopback_state
*state
= efx
->loopback_selftest
;
521 int i
, begin_rc
, end_rc
;
523 for (i
= 0; i
< 3; i
++) {
524 /* Determine how many packets to send */
525 state
->packet_count
= EFX_TXQ_SIZE
/ 3;
526 state
->packet_count
= min(1 << (i
<< 2), state
->packet_count
);
527 state
->skbs
= kzalloc(sizeof(state
->skbs
[0]) *
528 state
->packet_count
, GFP_KERNEL
);
531 state
->flush
= false;
533 EFX_LOG(efx
, "TX queue %d testing %s loopback with %d "
534 "packets\n", tx_queue
->queue
, LOOPBACK_MODE(efx
),
535 state
->packet_count
);
537 efx_iterate_state(efx
);
538 begin_rc
= efx_begin_loopback(tx_queue
);
540 /* This will normally complete very quickly, but be
541 * prepared to wait up to 100 ms. */
543 if (!efx_poll_loopback(efx
)) {
545 efx_poll_loopback(efx
);
548 end_rc
= efx_end_loopback(tx_queue
, lb_tests
);
551 if (begin_rc
|| end_rc
) {
552 /* Wait a while to ensure there are no packets
553 * floating around after a failure. */
554 schedule_timeout_uninterruptible(HZ
/ 10);
555 return begin_rc
? begin_rc
: end_rc
;
559 EFX_LOG(efx
, "TX queue %d passed %s loopback test with a burst length "
560 "of %d packets\n", tx_queue
->queue
, LOOPBACK_MODE(efx
),
561 state
->packet_count
);
566 /* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but
567 * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it
568 * to delay and retry. Therefore, it's safer to just poll directly. Wait
569 * for link up and any faults to dissipate. */
570 static int efx_wait_for_link(struct efx_nic
*efx
)
572 struct efx_link_state
*link_state
= &efx
->link_state
;
576 for (count
= 0; count
< 40; count
++) {
577 schedule_timeout_uninterruptible(HZ
/ 10);
579 if (efx
->type
->monitor
!= NULL
) {
580 mutex_lock(&efx
->mac_lock
);
581 efx
->type
->monitor(efx
);
582 mutex_unlock(&efx
->mac_lock
);
584 struct efx_channel
*channel
= &efx
->channel
[0];
585 if (channel
->work_pending
)
586 efx_process_channel_now(channel
);
589 mutex_lock(&efx
->mac_lock
);
590 link_up
= link_state
->up
;
592 link_up
= !efx
->mac_op
->check_fault(efx
);
593 mutex_unlock(&efx
->mac_lock
);
602 static int efx_test_loopbacks(struct efx_nic
*efx
, struct efx_self_tests
*tests
,
603 unsigned int loopback_modes
)
605 enum efx_loopback_mode mode
;
606 struct efx_loopback_state
*state
;
607 struct efx_tx_queue
*tx_queue
;
610 /* Set the port loopback_selftest member. From this point on
611 * all received packets will be dropped. Mark the state as
612 * "flushing" so all inflight packets are dropped */
613 state
= kzalloc(sizeof(*state
), GFP_KERNEL
);
616 BUG_ON(efx
->loopback_selftest
);
618 efx
->loopback_selftest
= state
;
620 /* Test all supported loopback modes */
621 for (mode
= LOOPBACK_NONE
; mode
<= LOOPBACK_TEST_MAX
; mode
++) {
622 if (!(loopback_modes
& (1 << mode
)))
625 /* Move the port into the specified loopback mode. */
627 mutex_lock(&efx
->mac_lock
);
628 efx
->loopback_mode
= mode
;
629 rc
= __efx_reconfigure_port(efx
);
630 mutex_unlock(&efx
->mac_lock
);
632 EFX_ERR(efx
, "unable to move into %s loopback\n",
637 rc
= efx_wait_for_link(efx
);
639 EFX_ERR(efx
, "loopback %s never came up\n",
644 /* Test every TX queue */
645 efx_for_each_tx_queue(tx_queue
, efx
) {
646 state
->offload_csum
= (tx_queue
->queue
==
647 EFX_TX_QUEUE_OFFLOAD_CSUM
);
648 rc
= efx_test_loopback(tx_queue
,
649 &tests
->loopback
[mode
]);
656 /* Remove the flush. The caller will remove the loopback setting */
658 efx
->loopback_selftest
= NULL
;
665 /**************************************************************************
669 *************************************************************************/
671 int efx_selftest(struct efx_nic
*efx
, struct efx_self_tests
*tests
,
674 enum efx_loopback_mode loopback_mode
= efx
->loopback_mode
;
675 int phy_mode
= efx
->phy_mode
;
676 enum reset_type reset_method
= RESET_TYPE_INVISIBLE
;
677 struct efx_channel
*channel
;
678 int rc_test
= 0, rc_reset
= 0, rc
;
680 /* Online (i.e. non-disruptive) testing
681 * This checks interrupt generation, event delivery and PHY presence. */
683 rc
= efx_test_mdio(efx
, tests
);
687 rc
= efx_test_nvram(efx
, tests
);
691 rc
= efx_test_interrupts(efx
, tests
);
695 efx_for_each_channel(channel
, efx
) {
696 rc
= efx_test_eventq_irq(channel
, tests
);
704 if (!(flags
& ETH_TEST_FL_OFFLINE
))
705 return efx_test_phy(efx
, tests
, flags
);
707 /* Offline (i.e. disruptive) testing
708 * This checks MAC and PHY loopback on the specified port. */
710 /* force the carrier state off so the kernel doesn't transmit during
711 * the loopback test, and the watchdog timeout doesn't fire. Also put
712 * falcon into loopback for the register test.
714 mutex_lock(&efx
->mac_lock
);
715 efx
->port_inhibited
= true;
716 if (efx
->loopback_modes
) {
717 /* We need the 312 clock from the PHY to test the XMAC
718 * registers, so move into XGMII loopback if available */
719 if (efx
->loopback_modes
& (1 << LOOPBACK_XGMII
))
720 efx
->loopback_mode
= LOOPBACK_XGMII
;
722 efx
->loopback_mode
= __ffs(efx
->loopback_modes
);
725 __efx_reconfigure_port(efx
);
726 mutex_unlock(&efx
->mac_lock
);
728 /* free up all consumers of SRAM (including all the queues) */
729 efx_reset_down(efx
, reset_method
);
731 rc
= efx_test_chip(efx
, tests
);
735 /* reset the chip to recover from the register test */
736 rc_reset
= efx
->type
->reset(efx
, reset_method
);
738 /* Ensure that the phy is powered and out of loopback
739 * for the bist and loopback tests */
740 efx
->phy_mode
&= ~PHY_MODE_LOW_POWER
;
741 efx
->loopback_mode
= LOOPBACK_NONE
;
743 rc
= efx_reset_up(efx
, reset_method
, rc_reset
== 0);
748 EFX_ERR(efx
, "Unable to recover from chip test\n");
749 efx_schedule_reset(efx
, RESET_TYPE_DISABLE
);
753 rc
= efx_test_phy(efx
, tests
, flags
);
757 rc
= efx_test_loopbacks(efx
, tests
, efx
->loopback_modes
);
761 /* restore the PHY to the previous state */
762 mutex_lock(&efx
->mac_lock
);
763 efx
->phy_mode
= phy_mode
;
764 efx
->port_inhibited
= false;
765 efx
->loopback_mode
= loopback_mode
;
766 __efx_reconfigure_port(efx
);
767 mutex_unlock(&efx
->mac_lock
);