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sfc: Fix sign of efx_mcdi_poll_reboot() error in efx_mcdi_poll()
[net-next-2.6.git] / drivers / net / sfc / mcdi.c
CommitLineData
afd4aea0
BH		 1/****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2008-2009 Solarflare Communications Inc.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation, incorporated herein by reference.
8 */
9
10#include <linux/delay.h>
11#include "net_driver.h"
12#include "nic.h"
13#include "io.h"
14#include "regs.h"
15#include "mcdi_pcol.h"
16#include "phy.h"
17
18/**************************************************************************
19 *
20 * Management-Controller-to-Driver Interface
21 *
22 **************************************************************************
23 */
24
25/* Software-defined structure to the shared-memory */
26#define CMD_NOTIFY_PORT0 0
27#define CMD_NOTIFY_PORT1 4
28#define CMD_PDU_PORT0 0x008
29#define CMD_PDU_PORT1 0x108
30#define REBOOT_FLAG_PORT0 0x3f8
31#define REBOOT_FLAG_PORT1 0x3fc
32
33#define MCDI_RPC_TIMEOUT 10 /*seconds */
34
35#define MCDI_PDU(efx) \
36 (efx_port_num(efx) ? CMD_PDU_PORT1 : CMD_PDU_PORT0)
37#define MCDI_DOORBELL(efx) \
38 (efx_port_num(efx) ? CMD_NOTIFY_PORT1 : CMD_NOTIFY_PORT0)
39#define MCDI_REBOOT_FLAG(efx) \
40 (efx_port_num(efx) ? REBOOT_FLAG_PORT1 : REBOOT_FLAG_PORT0)
41
42#define SEQ_MASK \
43 EFX_MASK32(EFX_WIDTH(MCDI_HEADER_SEQ))
44
45static inline struct efx_mcdi_iface *efx_mcdi(struct efx_nic *efx)
46{
47 struct siena_nic_data *nic_data;
48 EFX_BUG_ON_PARANOID(efx_nic_rev(efx) < EFX_REV_SIENA_A0);
49 nic_data = efx->nic_data;
50 return &nic_data->mcdi;
51}
52
53void efx_mcdi_init(struct efx_nic *efx)
54{
55 struct efx_mcdi_iface *mcdi;
56
57 if (efx_nic_rev(efx) < EFX_REV_SIENA_A0)
58 return;
59
60 mcdi = efx_mcdi(efx);
61 init_waitqueue_head(&mcdi->wq);
62 spin_lock_init(&mcdi->iface_lock);
63 atomic_set(&mcdi->state, MCDI_STATE_QUIESCENT);
64 mcdi->mode = MCDI_MODE_POLL;
65
66 (void) efx_mcdi_poll_reboot(efx);
67}
68
69static void efx_mcdi_copyin(struct efx_nic *efx, unsigned cmd,
70 const u8 *inbuf, size_t inlen)
71{
72 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
73 unsigned pdu = FR_CZ_MC_TREG_SMEM + MCDI_PDU(efx);
74 unsigned doorbell = FR_CZ_MC_TREG_SMEM + MCDI_DOORBELL(efx);
75 unsigned int i;
76 efx_dword_t hdr;
77 u32 xflags, seqno;
78
79 BUG_ON(atomic_read(&mcdi->state) == MCDI_STATE_QUIESCENT);
80 BUG_ON(inlen & 3 || inlen >= 0x100);
81
82 seqno = mcdi->seqno & SEQ_MASK;
83 xflags = 0;
84 if (mcdi->mode == MCDI_MODE_EVENTS)
85 xflags |= MCDI_HEADER_XFLAGS_EVREQ;
86
87 EFX_POPULATE_DWORD_6(hdr,
88 MCDI_HEADER_RESPONSE, 0,
89 MCDI_HEADER_RESYNC, 1,
90 MCDI_HEADER_CODE, cmd,
91 MCDI_HEADER_DATALEN, inlen,
92 MCDI_HEADER_SEQ, seqno,
93 MCDI_HEADER_XFLAGS, xflags);
94
95 efx_writed(efx, &hdr, pdu);
96
97 for (i = 0; i < inlen; i += 4)
98 _efx_writed(efx, *((__le32 *)(inbuf + i)), pdu + 4 + i);
99
100 /* Ensure the payload is written out before the header */
101 wmb();
102
103 /* ring the doorbell with a distinctive value */
104 _efx_writed(efx, (__force __le32) 0x45789abc, doorbell);
105}
106
107static void efx_mcdi_copyout(struct efx_nic *efx, u8 *outbuf, size_t outlen)
108{
109 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
110 unsigned int pdu = FR_CZ_MC_TREG_SMEM + MCDI_PDU(efx);
111 int i;
112
113 BUG_ON(atomic_read(&mcdi->state) == MCDI_STATE_QUIESCENT);
114 BUG_ON(outlen & 3 || outlen >= 0x100);
115
116 for (i = 0; i < outlen; i += 4)
117 *((__le32 *)(outbuf + i)) = _efx_readd(efx, pdu + 4 + i);
118}
119
120static int efx_mcdi_poll(struct efx_nic *efx)
121{
122 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
123 unsigned int time, finish;
124 unsigned int respseq, respcmd, error;
125 unsigned int pdu = FR_CZ_MC_TREG_SMEM + MCDI_PDU(efx);
126 unsigned int rc, spins;
127 efx_dword_t reg;
128
129 /* Check for a reboot atomically with respect to efx_mcdi_copyout() */
e0bf54c9 130 rc = -efx_mcdi_poll_reboot(efx);
afd4aea0
BH		 131 if (rc)
132 goto out;
133
134 /* Poll for completion. Poll quickly (once a us) for the 1st jiffy,
135 * because generally mcdi responses are fast. After that, back off
136 * and poll once a jiffy (approximately)
137 */
138 spins = TICK_USEC;
139 finish = get_seconds() + MCDI_RPC_TIMEOUT;
140
141 while (1) {
142 if (spins != 0) {
143 --spins;
144 udelay(1);
55029c1d
BH		 145 } else {
146 schedule_timeout_uninterruptible(1);
147 }
afd4aea0
BH		 148
149 time = get_seconds();
150
151 rmb();
152 efx_readd(efx, &reg, pdu);
153
154 /* All 1's indicates that shared memory is in reset (and is
155 * not a valid header). Wait for it to come out reset before
156 * completing the command */
157 if (EFX_DWORD_FIELD(reg, EFX_DWORD_0) != 0xffffffff &&
158 EFX_DWORD_FIELD(reg, MCDI_HEADER_RESPONSE))
159 break;
160
161 if (time >= finish)
162 return -ETIMEDOUT;
163 }
164
165 mcdi->resplen = EFX_DWORD_FIELD(reg, MCDI_HEADER_DATALEN);
166 respseq = EFX_DWORD_FIELD(reg, MCDI_HEADER_SEQ);
167 respcmd = EFX_DWORD_FIELD(reg, MCDI_HEADER_CODE);
168 error = EFX_DWORD_FIELD(reg, MCDI_HEADER_ERROR);
169
170 if (error && mcdi->resplen == 0) {
171 EFX_ERR(efx, "MC rebooted\n");
172 rc = EIO;
173 } else if ((respseq ^ mcdi->seqno) & SEQ_MASK) {
174 EFX_ERR(efx, "MC response mismatch tx seq 0x%x rx seq 0x%x\n",
175 respseq, mcdi->seqno);
176 rc = EIO;
177 } else if (error) {
178 efx_readd(efx, &reg, pdu + 4);
179 switch (EFX_DWORD_FIELD(reg, EFX_DWORD_0)) {
180#define TRANSLATE_ERROR(name) \
181 case MC_CMD_ERR_ ## name: \
182 rc = name; \
183 break
184 TRANSLATE_ERROR(ENOENT);
185 TRANSLATE_ERROR(EINTR);
186 TRANSLATE_ERROR(EACCES);
187 TRANSLATE_ERROR(EBUSY);
188 TRANSLATE_ERROR(EINVAL);
189 TRANSLATE_ERROR(EDEADLK);
190 TRANSLATE_ERROR(ENOSYS);
191 TRANSLATE_ERROR(ETIME);
192#undef TRANSLATE_ERROR
193 default:
194 rc = EIO;
195 break;
196 }
197 } else
198 rc = 0;
199
200out:
201 mcdi->resprc = rc;
202 if (rc)
203 mcdi->resplen = 0;
204
205 /* Return rc=0 like wait_event_timeout() */
206 return 0;
207}
208
209/* Test and clear MC-rebooted flag for this port/function */
210int efx_mcdi_poll_reboot(struct efx_nic *efx)
211{
212 unsigned int addr = FR_CZ_MC_TREG_SMEM + MCDI_REBOOT_FLAG(efx);
213 efx_dword_t reg;
214 uint32_t value;
215
216 if (efx_nic_rev(efx) < EFX_REV_SIENA_A0)
217 return false;
218
219 efx_readd(efx, &reg, addr);
220 value = EFX_DWORD_FIELD(reg, EFX_DWORD_0);
221
222 if (value == 0)
223 return 0;
224
225 EFX_ZERO_DWORD(reg);
226 efx_writed(efx, &reg, addr);
227
228 if (value == MC_STATUS_DWORD_ASSERT)
229 return -EINTR;
230 else
231 return -EIO;
232}
233
234static void efx_mcdi_acquire(struct efx_mcdi_iface *mcdi)
235{
236 /* Wait until the interface becomes QUIESCENT and we win the race
237 * to mark it RUNNING. */
238 wait_event(mcdi->wq,
239 atomic_cmpxchg(&mcdi->state,
240 MCDI_STATE_QUIESCENT,
241 MCDI_STATE_RUNNING)
242 == MCDI_STATE_QUIESCENT);
243}
244
245static int efx_mcdi_await_completion(struct efx_nic *efx)
246{
247 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
248
249 if (wait_event_timeout(
250 mcdi->wq,
251 atomic_read(&mcdi->state) == MCDI_STATE_COMPLETED,
252 msecs_to_jiffies(MCDI_RPC_TIMEOUT * 1000)) == 0)
253 return -ETIMEDOUT;
254
255 /* Check if efx_mcdi_set_mode() switched us back to polled completions.
256 * In which case, poll for completions directly. If efx_mcdi_ev_cpl()
257 * completed the request first, then we'll just end up completing the
258 * request again, which is safe.
259 *
260 * We need an smp_rmb() to synchronise with efx_mcdi_mode_poll(), which
261 * wait_event_timeout() implicitly provides.
262 */
263 if (mcdi->mode == MCDI_MODE_POLL)
264 return efx_mcdi_poll(efx);
265
266 return 0;
267}
268
269static bool efx_mcdi_complete(struct efx_mcdi_iface *mcdi)
270{
271 /* If the interface is RUNNING, then move to COMPLETED and wake any
272 * waiters. If the interface isn't in RUNNING then we've received a
273 * duplicate completion after we've already transitioned back to
274 * QUIESCENT. [A subsequent invocation would increment seqno, so would
275 * have failed the seqno check].
276 */
277 if (atomic_cmpxchg(&mcdi->state,
278 MCDI_STATE_RUNNING,
279 MCDI_STATE_COMPLETED) == MCDI_STATE_RUNNING) {
280 wake_up(&mcdi->wq);
281 return true;
282 }
283
284 return false;
285}
286
287static void efx_mcdi_release(struct efx_mcdi_iface *mcdi)
288{
289 atomic_set(&mcdi->state, MCDI_STATE_QUIESCENT);
290 wake_up(&mcdi->wq);
291}
292
293static void efx_mcdi_ev_cpl(struct efx_nic *efx, unsigned int seqno,
294 unsigned int datalen, unsigned int errno)
295{
296 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
297 bool wake = false;
298
299 spin_lock(&mcdi->iface_lock);
300
301 if ((seqno ^ mcdi->seqno) & SEQ_MASK) {
302 if (mcdi->credits)
303 /* The request has been cancelled */
304 --mcdi->credits;
305 else
306 EFX_ERR(efx, "MC response mismatch tx seq 0x%x rx "
307 "seq 0x%x\n", seqno, mcdi->seqno);
308 } else {
309 mcdi->resprc = errno;
310 mcdi->resplen = datalen;
311
312 wake = true;
313 }
314
315 spin_unlock(&mcdi->iface_lock);
316
317 if (wake)
318 efx_mcdi_complete(mcdi);
319}
320
321/* Issue the given command by writing the data into the shared memory PDU,
322 * ring the doorbell and wait for completion. Copyout the result. */
323int efx_mcdi_rpc(struct efx_nic *efx, unsigned cmd,
324 const u8 *inbuf, size_t inlen, u8 *outbuf, size_t outlen,
325 size_t *outlen_actual)
326{
327 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
328 int rc;
329 BUG_ON(efx_nic_rev(efx) < EFX_REV_SIENA_A0);
330
331 efx_mcdi_acquire(mcdi);
332
333 /* Serialise with efx_mcdi_ev_cpl() and efx_mcdi_ev_death() */
334 spin_lock_bh(&mcdi->iface_lock);
335 ++mcdi->seqno;
336 spin_unlock_bh(&mcdi->iface_lock);
337
338 efx_mcdi_copyin(efx, cmd, inbuf, inlen);
339
340 if (mcdi->mode == MCDI_MODE_POLL)
341 rc = efx_mcdi_poll(efx);
342 else
343 rc = efx_mcdi_await_completion(efx);
344
345 if (rc != 0) {
346 /* Close the race with efx_mcdi_ev_cpl() executing just too late
347 * and completing a request we've just cancelled, by ensuring
348 * that the seqno check therein fails.
349 */
350 spin_lock_bh(&mcdi->iface_lock);
351 ++mcdi->seqno;
352 ++mcdi->credits;
353 spin_unlock_bh(&mcdi->iface_lock);
354
355 EFX_ERR(efx, "MC command 0x%x inlen %d mode %d timed out\n",
356 cmd, (int)inlen, mcdi->mode);
357 } else {
358 size_t resplen;
359
360 /* At the very least we need a memory barrier here to ensure
361 * we pick up changes from efx_mcdi_ev_cpl(). Protect against
362 * a spurious efx_mcdi_ev_cpl() running concurrently by
363 * acquiring the iface_lock. */
364 spin_lock_bh(&mcdi->iface_lock);
365 rc = -mcdi->resprc;
366 resplen = mcdi->resplen;
367 spin_unlock_bh(&mcdi->iface_lock);
368
369 if (rc == 0) {
370 efx_mcdi_copyout(efx, outbuf,
371 min(outlen, mcdi->resplen + 3) & ~0x3);
372 if (outlen_actual != NULL)
373 *outlen_actual = resplen;
374 } else if (cmd == MC_CMD_REBOOT && rc == -EIO)
375 ; /* Don't reset if MC_CMD_REBOOT returns EIO */
376 else if (rc == -EIO || rc == -EINTR) {
377 EFX_ERR(efx, "MC fatal error %d\n", -rc);
378 efx_schedule_reset(efx, RESET_TYPE_MC_FAILURE);
379 } else
380 EFX_ERR(efx, "MC command 0x%x inlen %d failed rc=%d\n",
381 cmd, (int)inlen, -rc);
382 }
383
384 efx_mcdi_release(mcdi);
385 return rc;
386}
387
388void efx_mcdi_mode_poll(struct efx_nic *efx)
389{
390 struct efx_mcdi_iface *mcdi;
391
392 if (efx_nic_rev(efx) < EFX_REV_SIENA_A0)
393 return;
394
395 mcdi = efx_mcdi(efx);
396 if (mcdi->mode == MCDI_MODE_POLL)
397 return;
398
399 /* We can switch from event completion to polled completion, because
400 * mcdi requests are always completed in shared memory. We do this by
401 * switching the mode to POLL'd then completing the request.
402 * efx_mcdi_await_completion() will then call efx_mcdi_poll().
403 *
404 * We need an smp_wmb() to synchronise with efx_mcdi_await_completion(),
405 * which efx_mcdi_complete() provides for us.
406 */
407 mcdi->mode = MCDI_MODE_POLL;
408
409 efx_mcdi_complete(mcdi);
410}
411
412void efx_mcdi_mode_event(struct efx_nic *efx)
413{
414 struct efx_mcdi_iface *mcdi;
415
416 if (efx_nic_rev(efx) < EFX_REV_SIENA_A0)
417 return;
418
419 mcdi = efx_mcdi(efx);
420
421 if (mcdi->mode == MCDI_MODE_EVENTS)
422 return;
423
424 /* We can't switch from polled to event completion in the middle of a
425 * request, because the completion method is specified in the request.
426 * So acquire the interface to serialise the requestors. We don't need
427 * to acquire the iface_lock to change the mode here, but we do need a
428 * write memory barrier ensure that efx_mcdi_rpc() sees it, which
429 * efx_mcdi_acquire() provides.
430 */
431 efx_mcdi_acquire(mcdi);
432 mcdi->mode = MCDI_MODE_EVENTS;
433 efx_mcdi_release(mcdi);
434}
435
436static void efx_mcdi_ev_death(struct efx_nic *efx, int rc)
437{
438 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
439
440 /* If there is an outstanding MCDI request, it has been terminated
441 * either by a BADASSERT or REBOOT event. If the mcdi interface is
442 * in polled mode, then do nothing because the MC reboot handler will
443 * set the header correctly. However, if the mcdi interface is waiting
444 * for a CMDDONE event it won't receive it [and since all MCDI events
445 * are sent to the same queue, we can't be racing with
446 * efx_mcdi_ev_cpl()]
447 *
448 * There's a race here with efx_mcdi_rpc(), because we might receive
449 * a REBOOT event *before* the request has been copied out. In polled
450 * mode (during startup) this is irrelevent, because efx_mcdi_complete()
451 * is ignored. In event mode, this condition is just an edge-case of
452 * receiving a REBOOT event after posting the MCDI request. Did the mc
453 * reboot before or after the copyout? The best we can do always is
454 * just return failure.
455 */
456 spin_lock(&mcdi->iface_lock);
457 if (efx_mcdi_complete(mcdi)) {
458 if (mcdi->mode == MCDI_MODE_EVENTS) {
459 mcdi->resprc = rc;
460 mcdi->resplen = 0;
461 }
462 } else
463 /* Nobody was waiting for an MCDI request, so trigger a reset */
464 efx_schedule_reset(efx, RESET_TYPE_MC_FAILURE);
465
466 spin_unlock(&mcdi->iface_lock);
467}
468
469static unsigned int efx_mcdi_event_link_speed[] = {
470 [MCDI_EVENT_LINKCHANGE_SPEED_100M] = 100,
471 [MCDI_EVENT_LINKCHANGE_SPEED_1G] = 1000,
472 [MCDI_EVENT_LINKCHANGE_SPEED_10G] = 10000,
473};
474
475
476static void efx_mcdi_process_link_change(struct efx_nic *efx, efx_qword_t *ev)
477{
478 u32 flags, fcntl, speed, lpa;
479
480 speed = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_SPEED);
481 EFX_BUG_ON_PARANOID(speed >= ARRAY_SIZE(efx_mcdi_event_link_speed));
482 speed = efx_mcdi_event_link_speed[speed];
483
484 flags = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LINK_FLAGS);
485 fcntl = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_FCNTL);
486 lpa = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LP_CAP);
487
488 /* efx->link_state is only modified by efx_mcdi_phy_get_link(),
489 * which is only run after flushing the event queues. Therefore, it
490 * is safe to modify the link state outside of the mac_lock here.
491 */
492 efx_mcdi_phy_decode_link(efx, &efx->link_state, speed, flags, fcntl);
493
494 efx_mcdi_phy_check_fcntl(efx, lpa);
495
496 efx_link_status_changed(efx);
497}
498
499static const char *sensor_names[] = {
500 [MC_CMD_SENSOR_CONTROLLER_TEMP] = "Controller temp. sensor",
501 [MC_CMD_SENSOR_PHY_COMMON_TEMP] = "PHY shared temp. sensor",
502 [MC_CMD_SENSOR_CONTROLLER_COOLING] = "Controller cooling",
503 [MC_CMD_SENSOR_PHY0_TEMP] = "PHY 0 temp. sensor",
504 [MC_CMD_SENSOR_PHY0_COOLING] = "PHY 0 cooling",
505 [MC_CMD_SENSOR_PHY1_TEMP] = "PHY 1 temp. sensor",
506 [MC_CMD_SENSOR_PHY1_COOLING] = "PHY 1 cooling",
507 [MC_CMD_SENSOR_IN_1V0] = "1.0V supply sensor",
508 [MC_CMD_SENSOR_IN_1V2] = "1.2V supply sensor",
509 [MC_CMD_SENSOR_IN_1V8] = "1.8V supply sensor",
510 [MC_CMD_SENSOR_IN_2V5] = "2.5V supply sensor",
511 [MC_CMD_SENSOR_IN_3V3] = "3.3V supply sensor",
512 [MC_CMD_SENSOR_IN_12V0] = "12V supply sensor"
513};
514
515static const char *sensor_status_names[] = {
516 [MC_CMD_SENSOR_STATE_OK] = "OK",
517 [MC_CMD_SENSOR_STATE_WARNING] = "Warning",
518 [MC_CMD_SENSOR_STATE_FATAL] = "Fatal",
519 [MC_CMD_SENSOR_STATE_BROKEN] = "Device failure",
520};
521
522static void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev)
523{
524 unsigned int monitor, state, value;
525 const char *name, *state_txt;
526 monitor = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_MONITOR);
527 state = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_STATE);
528 value = EFX_QWORD_FIELD(*ev, MCDI_EVENT_SENSOREVT_VALUE);
529 /* Deal gracefully with the board having more drivers than we
530 * know about, but do not expect new sensor states. */
531 name = (monitor >= ARRAY_SIZE(sensor_names))
532 ? "No sensor name available" :
533 sensor_names[monitor];
534 EFX_BUG_ON_PARANOID(state >= ARRAY_SIZE(sensor_status_names));
535 state_txt = sensor_status_names[state];
536
537 EFX_ERR(efx, "Sensor %d (%s) reports condition '%s' for raw value %d\n",
538 monitor, name, state_txt, value);
539}
540
541/* Called from falcon_process_eventq for MCDI events */
542void efx_mcdi_process_event(struct efx_channel *channel,
543 efx_qword_t *event)
544{
545 struct efx_nic *efx = channel->efx;
546 int code = EFX_QWORD_FIELD(*event, MCDI_EVENT_CODE);
547 u32 data = EFX_QWORD_FIELD(*event, MCDI_EVENT_DATA);
548
549 switch (code) {
550 case MCDI_EVENT_CODE_BADSSERT:
551 EFX_ERR(efx, "MC watchdog or assertion failure at 0x%x\n", data);
552 efx_mcdi_ev_death(efx, EINTR);
553 break;
554
555 case MCDI_EVENT_CODE_PMNOTICE:
556 EFX_INFO(efx, "MCDI PM event.\n");
557 break;
558
559 case MCDI_EVENT_CODE_CMDDONE:
560 efx_mcdi_ev_cpl(efx,
561 MCDI_EVENT_FIELD(*event, CMDDONE_SEQ),
562 MCDI_EVENT_FIELD(*event, CMDDONE_DATALEN),
563 MCDI_EVENT_FIELD(*event, CMDDONE_ERRNO));
564 break;
565
566 case MCDI_EVENT_CODE_LINKCHANGE:
567 efx_mcdi_process_link_change(efx, event);
568 break;
569 case MCDI_EVENT_CODE_SENSOREVT:
570 efx_mcdi_sensor_event(efx, event);
571 break;
572 case MCDI_EVENT_CODE_SCHEDERR:
573 EFX_INFO(efx, "MC Scheduler error address=0x%x\n", data);
574 break;
575 case MCDI_EVENT_CODE_REBOOT:
576 EFX_INFO(efx, "MC Reboot\n");
577 efx_mcdi_ev_death(efx, EIO);
578 break;
579 case MCDI_EVENT_CODE_MAC_STATS_DMA:
580 /* MAC stats are gather lazily. We can ignore this. */
581 break;
582
583 default:
584 EFX_ERR(efx, "Unknown MCDI event 0x%x\n", code);
585 }
586}
587
588/**************************************************************************
589 *
590 * Specific request functions
591 *
592 **************************************************************************
593 */
594
595int efx_mcdi_fwver(struct efx_nic *efx, u64 *version, u32 *build)
596{
597 u8 outbuf[ALIGN(MC_CMD_GET_VERSION_V1_OUT_LEN, 4)];
598 size_t outlength;
599 const __le16 *ver_words;
600 int rc;
601
602 BUILD_BUG_ON(MC_CMD_GET_VERSION_IN_LEN != 0);
603
604 rc = efx_mcdi_rpc(efx, MC_CMD_GET_VERSION, NULL, 0,
605 outbuf, sizeof(outbuf), &outlength);
606 if (rc)
607 goto fail;
608
609 if (outlength == MC_CMD_GET_VERSION_V0_OUT_LEN) {
610 *version = 0;
611 *build = MCDI_DWORD(outbuf, GET_VERSION_OUT_FIRMWARE);
612 return 0;
613 }
614
615 if (outlength < MC_CMD_GET_VERSION_V1_OUT_LEN) {
616 rc = -EMSGSIZE;
617 goto fail;
618 }
619
620 ver_words = (__le16 *)MCDI_PTR(outbuf, GET_VERSION_OUT_VERSION);
621 *version = (((u64)le16_to_cpu(ver_words[0]) << 48) |
622 ((u64)le16_to_cpu(ver_words[1]) << 32) |
623 ((u64)le16_to_cpu(ver_words[2]) << 16) |
624 le16_to_cpu(ver_words[3]));
625 *build = MCDI_DWORD(outbuf, GET_VERSION_OUT_FIRMWARE);
626
627 return 0;
628
629fail:
630 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
631 return rc;
632}
633
634int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating,
635 bool *was_attached)
636{
637 u8 inbuf[MC_CMD_DRV_ATTACH_IN_LEN];
638 u8 outbuf[MC_CMD_DRV_ATTACH_OUT_LEN];
639 size_t outlen;
640 int rc;
641
642 MCDI_SET_DWORD(inbuf, DRV_ATTACH_IN_NEW_STATE,
643 driver_operating ? 1 : 0);
644 MCDI_SET_DWORD(inbuf, DRV_ATTACH_IN_UPDATE, 1);
645
646 rc = efx_mcdi_rpc(efx, MC_CMD_DRV_ATTACH, inbuf, sizeof(inbuf),
647 outbuf, sizeof(outbuf), &outlen);
648 if (rc)
649 goto fail;
650 if (outlen < MC_CMD_DRV_ATTACH_OUT_LEN)
651 goto fail;
652
653 if (was_attached != NULL)
654 *was_attached = MCDI_DWORD(outbuf, DRV_ATTACH_OUT_OLD_STATE);
655 return 0;
656
657fail:
658 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
659 return rc;
660}
661
662int efx_mcdi_get_board_cfg(struct efx_nic *efx, u8 *mac_address,
663 u16 *fw_subtype_list)
664{
665 uint8_t outbuf[MC_CMD_GET_BOARD_CFG_OUT_LEN];
666 size_t outlen;
667 int port_num = efx_port_num(efx);
668 int offset;
669 int rc;
670
671 BUILD_BUG_ON(MC_CMD_GET_BOARD_CFG_IN_LEN != 0);
672
673 rc = efx_mcdi_rpc(efx, MC_CMD_GET_BOARD_CFG, NULL, 0,
674 outbuf, sizeof(outbuf), &outlen);
675 if (rc)
676 goto fail;
677
678 if (outlen < MC_CMD_GET_BOARD_CFG_OUT_LEN) {
679 rc = -EMSGSIZE;
680 goto fail;
681 }
682
683 offset = (port_num)
684 ? MC_CMD_GET_BOARD_CFG_OUT_MAC_ADDR_BASE_PORT1_OFST
685 : MC_CMD_GET_BOARD_CFG_OUT_MAC_ADDR_BASE_PORT0_OFST;
686 if (mac_address)
687 memcpy(mac_address, outbuf + offset, ETH_ALEN);
688 if (fw_subtype_list)
689 memcpy(fw_subtype_list,
690 outbuf + MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_OFST,
691 MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_LEN);
692
693 return 0;
694
695fail:
696 EFX_ERR(efx, "%s: failed rc=%d len=%d\n", __func__, rc, (int)outlen);
697
698 return rc;
699}
700
701int efx_mcdi_log_ctrl(struct efx_nic *efx, bool evq, bool uart, u32 dest_evq)
702{
703 u8 inbuf[MC_CMD_LOG_CTRL_IN_LEN];
704 u32 dest = 0;
705 int rc;
706
707 if (uart)
708 dest |= MC_CMD_LOG_CTRL_IN_LOG_DEST_UART;
709 if (evq)
710 dest |= MC_CMD_LOG_CTRL_IN_LOG_DEST_EVQ;
711
712 MCDI_SET_DWORD(inbuf, LOG_CTRL_IN_LOG_DEST, dest);
713 MCDI_SET_DWORD(inbuf, LOG_CTRL_IN_LOG_DEST_EVQ, dest_evq);
714
715 BUILD_BUG_ON(MC_CMD_LOG_CTRL_OUT_LEN != 0);
716
717 rc = efx_mcdi_rpc(efx, MC_CMD_LOG_CTRL, inbuf, sizeof(inbuf),
718 NULL, 0, NULL);
719 if (rc)
720 goto fail;
721
722 return 0;
723
724fail:
725 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
726 return rc;
727}
728
729int efx_mcdi_nvram_types(struct efx_nic *efx, u32 *nvram_types_out)
730{
731 u8 outbuf[MC_CMD_NVRAM_TYPES_OUT_LEN];
732 size_t outlen;
733 int rc;
734
735 BUILD_BUG_ON(MC_CMD_NVRAM_TYPES_IN_LEN != 0);
736
737 rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_TYPES, NULL, 0,
738 outbuf, sizeof(outbuf), &outlen);
739 if (rc)
740 goto fail;
741 if (outlen < MC_CMD_NVRAM_TYPES_OUT_LEN)
742 goto fail;
743
744 *nvram_types_out = MCDI_DWORD(outbuf, NVRAM_TYPES_OUT_TYPES);
745 return 0;
746
747fail:
748 EFX_ERR(efx, "%s: failed rc=%d\n",
749 __func__, rc);
750 return rc;
751}
752
753int efx_mcdi_nvram_info(struct efx_nic *efx, unsigned int type,
754 size_t *size_out, size_t *erase_size_out,
755 bool *protected_out)
756{
757 u8 inbuf[MC_CMD_NVRAM_INFO_IN_LEN];
758 u8 outbuf[MC_CMD_NVRAM_INFO_OUT_LEN];
759 size_t outlen;
760 int rc;
761
762 MCDI_SET_DWORD(inbuf, NVRAM_INFO_IN_TYPE, type);
763
764 rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_INFO, inbuf, sizeof(inbuf),
765 outbuf, sizeof(outbuf), &outlen);
766 if (rc)
767 goto fail;
768 if (outlen < MC_CMD_NVRAM_INFO_OUT_LEN)
769 goto fail;
770
771 *size_out = MCDI_DWORD(outbuf, NVRAM_INFO_OUT_SIZE);
772 *erase_size_out = MCDI_DWORD(outbuf, NVRAM_INFO_OUT_ERASESIZE);
773 *protected_out = !!(MCDI_DWORD(outbuf, NVRAM_INFO_OUT_FLAGS) &
774 (1 << MC_CMD_NVRAM_PROTECTED_LBN));
775 return 0;
776
777fail:
778 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
779 return rc;
780}
781
782int efx_mcdi_nvram_update_start(struct efx_nic *efx, unsigned int type)
783{
784 u8 inbuf[MC_CMD_NVRAM_UPDATE_START_IN_LEN];
785 int rc;
786
787 MCDI_SET_DWORD(inbuf, NVRAM_UPDATE_START_IN_TYPE, type);
788
789 BUILD_BUG_ON(MC_CMD_NVRAM_UPDATE_START_OUT_LEN != 0);
790
791 rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_UPDATE_START, inbuf, sizeof(inbuf),
792 NULL, 0, NULL);
793 if (rc)
794 goto fail;
795
796 return 0;
797
798fail:
799 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
800 return rc;
801}
802
803int efx_mcdi_nvram_read(struct efx_nic *efx, unsigned int type,
804 loff_t offset, u8 *buffer, size_t length)
805{
806 u8 inbuf[MC_CMD_NVRAM_READ_IN_LEN];
5a27e86b 807 u8 outbuf[MC_CMD_NVRAM_READ_OUT_LEN(EFX_MCDI_NVRAM_LEN_MAX)];
afd4aea0
BH		 808 size_t outlen;
809 int rc;
810
811 MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_TYPE, type);
812 MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_OFFSET, offset);
813 MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_LENGTH, length);
814
815 rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_READ, inbuf, sizeof(inbuf),
816 outbuf, sizeof(outbuf), &outlen);
817 if (rc)
818 goto fail;
819
820 memcpy(buffer, MCDI_PTR(outbuf, NVRAM_READ_OUT_READ_BUFFER), length);
821 return 0;
822
823fail:
824 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
825 return rc;
826}
827
828int efx_mcdi_nvram_write(struct efx_nic *efx, unsigned int type,
829 loff_t offset, const u8 *buffer, size_t length)
830{
5a27e86b 831 u8 inbuf[MC_CMD_NVRAM_WRITE_IN_LEN(EFX_MCDI_NVRAM_LEN_MAX)];
afd4aea0
BH		 832 int rc;
833
834 MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_TYPE, type);
835 MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_OFFSET, offset);
836 MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_LENGTH, length);
837 memcpy(MCDI_PTR(inbuf, NVRAM_WRITE_IN_WRITE_BUFFER), buffer, length);
838
839 BUILD_BUG_ON(MC_CMD_NVRAM_WRITE_OUT_LEN != 0);
840
5a27e86b
BH		 841 rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_WRITE, inbuf,
842 ALIGN(MC_CMD_NVRAM_WRITE_IN_LEN(length), 4),
afd4aea0
BH		 843 NULL, 0, NULL);
844 if (rc)
845 goto fail;
846
847 return 0;
848
849fail:
850 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
851 return rc;
852}
853
854int efx_mcdi_nvram_erase(struct efx_nic *efx, unsigned int type,
855 loff_t offset, size_t length)
856{
857 u8 inbuf[MC_CMD_NVRAM_ERASE_IN_LEN];
858 int rc;
859
860 MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_TYPE, type);
861 MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_OFFSET, offset);
862 MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_LENGTH, length);
863
864 BUILD_BUG_ON(MC_CMD_NVRAM_ERASE_OUT_LEN != 0);
865
866 rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_ERASE, inbuf, sizeof(inbuf),
867 NULL, 0, NULL);
868 if (rc)
869 goto fail;
870
871 return 0;
872
873fail:
874 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
875 return rc;
876}
877
878int efx_mcdi_nvram_update_finish(struct efx_nic *efx, unsigned int type)
879{
880 u8 inbuf[MC_CMD_NVRAM_UPDATE_FINISH_IN_LEN];
881 int rc;
882
883 MCDI_SET_DWORD(inbuf, NVRAM_UPDATE_FINISH_IN_TYPE, type);
884
885 BUILD_BUG_ON(MC_CMD_NVRAM_UPDATE_FINISH_OUT_LEN != 0);
886
887 rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_UPDATE_FINISH, inbuf, sizeof(inbuf),
888 NULL, 0, NULL);
889 if (rc)
890 goto fail;
891
892 return 0;
893
894fail:
895 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
896 return rc;
897}
898
899int efx_mcdi_handle_assertion(struct efx_nic *efx)
900{
901 union {
902 u8 asserts[MC_CMD_GET_ASSERTS_IN_LEN];
903 u8 reboot[MC_CMD_REBOOT_IN_LEN];
904 } inbuf;
905 u8 assertion[MC_CMD_GET_ASSERTS_OUT_LEN];
906 unsigned int flags, index, ofst;
907 const char *reason;
908 size_t outlen;
909 int retry;
910 int rc;
911
912 /* Check if the MC is in the assertion handler, retrying twice. Once
913 * because a boot-time assertion might cause this command to fail
914 * with EINTR. And once again because GET_ASSERTS can race with
915 * MC_CMD_REBOOT running on the other port. */
916 retry = 2;
917 do {
918 MCDI_SET_DWORD(inbuf.asserts, GET_ASSERTS_IN_CLEAR, 0);
919 rc = efx_mcdi_rpc(efx, MC_CMD_GET_ASSERTS,
920 inbuf.asserts, MC_CMD_GET_ASSERTS_IN_LEN,
921 assertion, sizeof(assertion), &outlen);
922 } while ((rc == -EINTR || rc == -EIO) && retry-- > 0);
923
924 if (rc)
925 return rc;
926 if (outlen < MC_CMD_GET_ASSERTS_OUT_LEN)
927 return -EINVAL;
928
929 flags = MCDI_DWORD(assertion, GET_ASSERTS_OUT_GLOBAL_FLAGS);
930 if (flags == MC_CMD_GET_ASSERTS_FLAGS_NO_FAILS)
931 return 0;
932
933 /* Reset the hardware atomically such that only one port with succeed.
934 * This command will succeed if a reboot is no longer required (because
935 * the other port did it first), but fail with EIO if it succeeds.
936 */
937 BUILD_BUG_ON(MC_CMD_REBOOT_OUT_LEN != 0);
938 MCDI_SET_DWORD(inbuf.reboot, REBOOT_IN_FLAGS,
939 MC_CMD_REBOOT_FLAGS_AFTER_ASSERTION);
940 efx_mcdi_rpc(efx, MC_CMD_REBOOT, inbuf.reboot, MC_CMD_REBOOT_IN_LEN,
941 NULL, 0, NULL);
942
943 /* Print out the assertion */
944 reason = (flags == MC_CMD_GET_ASSERTS_FLAGS_SYS_FAIL)
945 ? "system-level assertion"
946 : (flags == MC_CMD_GET_ASSERTS_FLAGS_THR_FAIL)
947 ? "thread-level assertion"
948 : (flags == MC_CMD_GET_ASSERTS_FLAGS_WDOG_FIRED)
949 ? "watchdog reset"
950 : "unknown assertion";
951 EFX_ERR(efx, "MCPU %s at PC = 0x%.8x in thread 0x%.8x\n", reason,
952 MCDI_DWORD(assertion, GET_ASSERTS_OUT_SAVED_PC_OFFS),
953 MCDI_DWORD(assertion, GET_ASSERTS_OUT_THREAD_OFFS));
954
955 /* Print out the registers */
956 ofst = MC_CMD_GET_ASSERTS_OUT_GP_REGS_OFFS_OFST;
957 for (index = 1; index < 32; index++) {
958 EFX_ERR(efx, "R%.2d (?): 0x%.8x\n", index,
959 MCDI_DWORD2(assertion, ofst));
960 ofst += sizeof(efx_dword_t);
961 }
962
963 return 0;
964}
965
966void efx_mcdi_set_id_led(struct efx_nic *efx, enum efx_led_mode mode)
967{
968 u8 inbuf[MC_CMD_SET_ID_LED_IN_LEN];
969 int rc;
970
971 BUILD_BUG_ON(EFX_LED_OFF != MC_CMD_LED_OFF);
972 BUILD_BUG_ON(EFX_LED_ON != MC_CMD_LED_ON);
973 BUILD_BUG_ON(EFX_LED_DEFAULT != MC_CMD_LED_DEFAULT);
974
975 BUILD_BUG_ON(MC_CMD_SET_ID_LED_OUT_LEN != 0);
976
977 MCDI_SET_DWORD(inbuf, SET_ID_LED_IN_STATE, mode);
978
979 rc = efx_mcdi_rpc(efx, MC_CMD_SET_ID_LED, inbuf, sizeof(inbuf),
980 NULL, 0, NULL);
981 if (rc)
982 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
983}
984
985int efx_mcdi_reset_port(struct efx_nic *efx)
986{
987 int rc = efx_mcdi_rpc(efx, MC_CMD_PORT_RESET, NULL, 0, NULL, 0, NULL);
988 if (rc)
989 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
990 return rc;
991}
992
993int efx_mcdi_reset_mc(struct efx_nic *efx)
994{
995 u8 inbuf[MC_CMD_REBOOT_IN_LEN];
996 int rc;
997
998 BUILD_BUG_ON(MC_CMD_REBOOT_OUT_LEN != 0);
999 MCDI_SET_DWORD(inbuf, REBOOT_IN_FLAGS, 0);
1000 rc = efx_mcdi_rpc(efx, MC_CMD_REBOOT, inbuf, sizeof(inbuf),
1001 NULL, 0, NULL);
1002 /* White is black, and up is down */
1003 if (rc == -EIO)
1004 return 0;
1005 if (rc == 0)
1006 rc = -EIO;
1007 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
1008 return rc;
1009}
1010
1011int efx_mcdi_wol_filter_set(struct efx_nic *efx, u32 type,
1012 const u8 *mac, int *id_out)
1013{
1014 u8 inbuf[MC_CMD_WOL_FILTER_SET_IN_LEN];
1015 u8 outbuf[MC_CMD_WOL_FILTER_SET_OUT_LEN];
1016 size_t outlen;
1017 int rc;
1018
1019 MCDI_SET_DWORD(inbuf, WOL_FILTER_SET_IN_WOL_TYPE, type);
1020 MCDI_SET_DWORD(inbuf, WOL_FILTER_SET_IN_FILTER_MODE,
1021 MC_CMD_FILTER_MODE_SIMPLE);
1022 memcpy(MCDI_PTR(inbuf, WOL_FILTER_SET_IN_MAGIC_MAC), mac, ETH_ALEN);
1023
1024 rc = efx_mcdi_rpc(efx, MC_CMD_WOL_FILTER_SET, inbuf, sizeof(inbuf),
1025 outbuf, sizeof(outbuf), &outlen);
1026 if (rc)
1027 goto fail;
1028
1029 if (outlen < MC_CMD_WOL_FILTER_SET_OUT_LEN) {
1030 rc = -EMSGSIZE;
1031 goto fail;
1032 }
1033
1034 *id_out = (int)MCDI_DWORD(outbuf, WOL_FILTER_SET_OUT_FILTER_ID);
1035
1036 return 0;
1037
1038fail:
1039 *id_out = -1;
1040 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
1041 return rc;
1042
1043}
1044
1045
1046int
1047efx_mcdi_wol_filter_set_magic(struct efx_nic *efx, const u8 *mac, int *id_out)
1048{
1049 return efx_mcdi_wol_filter_set(efx, MC_CMD_WOL_TYPE_MAGIC, mac, id_out);
1050}
1051
1052
1053int efx_mcdi_wol_filter_get_magic(struct efx_nic *efx, int *id_out)
1054{
1055 u8 outbuf[MC_CMD_WOL_FILTER_GET_OUT_LEN];
1056 size_t outlen;
1057 int rc;
1058
1059 rc = efx_mcdi_rpc(efx, MC_CMD_WOL_FILTER_GET, NULL, 0,
1060 outbuf, sizeof(outbuf), &outlen);
1061 if (rc)
1062 goto fail;
1063
1064 if (outlen < MC_CMD_WOL_FILTER_GET_OUT_LEN) {
1065 rc = -EMSGSIZE;
1066 goto fail;
1067 }
1068
1069 *id_out = (int)MCDI_DWORD(outbuf, WOL_FILTER_GET_OUT_FILTER_ID);
1070
1071 return 0;
1072
1073fail:
1074 *id_out = -1;
1075 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
1076 return rc;
1077}
1078
1079
1080int efx_mcdi_wol_filter_remove(struct efx_nic *efx, int id)
1081{
1082 u8 inbuf[MC_CMD_WOL_FILTER_REMOVE_IN_LEN];
1083 int rc;
1084
1085 MCDI_SET_DWORD(inbuf, WOL_FILTER_REMOVE_IN_FILTER_ID, (u32)id);
1086
1087 rc = efx_mcdi_rpc(efx, MC_CMD_WOL_FILTER_REMOVE, inbuf, sizeof(inbuf),
1088 NULL, 0, NULL);
1089 if (rc)
1090 goto fail;
1091
1092 return 0;
1093
1094fail:
1095 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
1096 return rc;
1097}
1098
1099
1100int efx_mcdi_wol_filter_reset(struct efx_nic *efx)
1101{
1102 int rc;
1103
1104 rc = efx_mcdi_rpc(efx, MC_CMD_WOL_FILTER_RESET, NULL, 0, NULL, 0, NULL);
1105 if (rc)
1106 goto fail;
1107
1108 return 0;
1109
1110fail:
1111 EFX_ERR(efx, "%s: failed rc=%d\n", __func__, rc);
1112 return rc;
1113}
1114
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