mcdi.c 35.3 KB
Newer Older
1 2
/****************************************************************************
 * Driver for Solarflare Solarstorm network controllers and boards
3
 * Copyright 2008-2011 Solarflare Communications Inc.
4 5 6 7 8 9 10 11 12 13
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation, incorporated herein by reference.
 */

#include <linux/delay.h>
#include "net_driver.h"
#include "nic.h"
#include "io.h"
14
#include "farch_regs.h"
15 16 17 18 19 20 21 22 23 24
#include "mcdi_pcol.h"
#include "phy.h"

/**************************************************************************
 *
 * Management-Controller-to-Driver Interface
 *
 **************************************************************************
 */

25
#define MCDI_RPC_TIMEOUT       (10 * HZ)
26

27 28
/* A reboot/assertion causes the MCDI status word to be set after the
 * command word is set or a REBOOT event is sent. If we notice a reboot
29 30
 * via these mechanisms then wait 20ms for the status word to be set.
 */
31
#define MCDI_STATUS_DELAY_US		100
32
#define MCDI_STATUS_DELAY_COUNT		200
33 34
#define MCDI_STATUS_SLEEP_MS						\
	(MCDI_STATUS_DELAY_US * MCDI_STATUS_DELAY_COUNT / 1000)
35 36 37 38 39 40

#define SEQ_MASK							\
	EFX_MASK32(EFX_WIDTH(MCDI_HEADER_SEQ))

static inline struct efx_mcdi_iface *efx_mcdi(struct efx_nic *efx)
{
41 42
	EFX_BUG_ON_PARANOID(!efx->mcdi);
	return &efx->mcdi->iface;
43 44
}

45
int efx_mcdi_init(struct efx_nic *efx)
46 47 48
{
	struct efx_mcdi_iface *mcdi;

49 50 51 52
	efx->mcdi = kzalloc(sizeof(*efx->mcdi), GFP_KERNEL);
	if (!efx->mcdi)
		return -ENOMEM;

53 54 55 56 57 58 59
	mcdi = efx_mcdi(efx);
	init_waitqueue_head(&mcdi->wq);
	spin_lock_init(&mcdi->iface_lock);
	atomic_set(&mcdi->state, MCDI_STATE_QUIESCENT);
	mcdi->mode = MCDI_MODE_POLL;

	(void) efx_mcdi_poll_reboot(efx);
60
	mcdi->new_epoch = true;
61 62 63

	/* Recover from a failed assertion before probing */
	return efx_mcdi_handle_assertion(efx);
64 65
}

66 67 68 69 70 71 72
void efx_mcdi_fini(struct efx_nic *efx)
{
	BUG_ON(efx->mcdi &&
	       atomic_read(&efx->mcdi->iface.state) != MCDI_STATE_QUIESCENT);
	kfree(efx->mcdi);
}

73
static void efx_mcdi_copyin(struct efx_nic *efx, unsigned cmd,
74
			    const efx_dword_t *inbuf, size_t inlen)
75 76
{
	struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
77 78
	efx_dword_t hdr[2];
	size_t hdr_len;
79 80 81 82 83 84 85 86 87
	u32 xflags, seqno;

	BUG_ON(atomic_read(&mcdi->state) == MCDI_STATE_QUIESCENT);

	seqno = mcdi->seqno & SEQ_MASK;
	xflags = 0;
	if (mcdi->mode == MCDI_MODE_EVENTS)
		xflags |= MCDI_HEADER_XFLAGS_EVREQ;

88 89
	if (efx->type->mcdi_max_ver == 1) {
		/* MCDI v1 */
90
		EFX_POPULATE_DWORD_7(hdr[0],
91 92 93 94 95
				     MCDI_HEADER_RESPONSE, 0,
				     MCDI_HEADER_RESYNC, 1,
				     MCDI_HEADER_CODE, cmd,
				     MCDI_HEADER_DATALEN, inlen,
				     MCDI_HEADER_SEQ, seqno,
96 97
				     MCDI_HEADER_XFLAGS, xflags,
				     MCDI_HEADER_NOT_EPOCH, !mcdi->new_epoch);
98 99 100 101
		hdr_len = 4;
	} else {
		/* MCDI v2 */
		BUG_ON(inlen > MCDI_CTL_SDU_LEN_MAX_V2);
102
		EFX_POPULATE_DWORD_7(hdr[0],
103 104 105 106 107
				     MCDI_HEADER_RESPONSE, 0,
				     MCDI_HEADER_RESYNC, 1,
				     MCDI_HEADER_CODE, MC_CMD_V2_EXTN,
				     MCDI_HEADER_DATALEN, 0,
				     MCDI_HEADER_SEQ, seqno,
108 109
				     MCDI_HEADER_XFLAGS, xflags,
				     MCDI_HEADER_NOT_EPOCH, !mcdi->new_epoch);
110 111 112 113 114
		EFX_POPULATE_DWORD_2(hdr[1],
				     MC_CMD_V2_EXTN_IN_EXTENDED_CMD, cmd,
				     MC_CMD_V2_EXTN_IN_ACTUAL_LEN, inlen);
		hdr_len = 8;
	}
115

116
	efx->type->mcdi_request(efx, hdr, hdr_len, inbuf, inlen);
117 118
}

119 120 121 122 123 124 125 126
static int efx_mcdi_errno(unsigned int mcdi_err)
{
	switch (mcdi_err) {
	case 0:
		return 0;
#define TRANSLATE_ERROR(name)					\
	case MC_CMD_ERR_ ## name:				\
		return -name;
127
	TRANSLATE_ERROR(EPERM);
128 129
	TRANSLATE_ERROR(ENOENT);
	TRANSLATE_ERROR(EINTR);
130
	TRANSLATE_ERROR(EAGAIN);
131 132 133 134 135 136
	TRANSLATE_ERROR(EACCES);
	TRANSLATE_ERROR(EBUSY);
	TRANSLATE_ERROR(EINVAL);
	TRANSLATE_ERROR(EDEADLK);
	TRANSLATE_ERROR(ENOSYS);
	TRANSLATE_ERROR(ETIME);
137 138
	TRANSLATE_ERROR(EALREADY);
	TRANSLATE_ERROR(ENOSPC);
139
#undef TRANSLATE_ERROR
140 141 142 143
	case MC_CMD_ERR_ALLOC_FAIL:
		return -ENOBUFS;
	case MC_CMD_ERR_MAC_EXIST:
		return -EADDRINUSE;
144
	default:
145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183
		return -EPROTO;
	}
}

static void efx_mcdi_read_response_header(struct efx_nic *efx)
{
	struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
	unsigned int respseq, respcmd, error;
	efx_dword_t hdr;

	efx->type->mcdi_read_response(efx, &hdr, 0, 4);
	respseq = EFX_DWORD_FIELD(hdr, MCDI_HEADER_SEQ);
	respcmd = EFX_DWORD_FIELD(hdr, MCDI_HEADER_CODE);
	error = EFX_DWORD_FIELD(hdr, MCDI_HEADER_ERROR);

	if (respcmd != MC_CMD_V2_EXTN) {
		mcdi->resp_hdr_len = 4;
		mcdi->resp_data_len = EFX_DWORD_FIELD(hdr, MCDI_HEADER_DATALEN);
	} else {
		efx->type->mcdi_read_response(efx, &hdr, 4, 4);
		mcdi->resp_hdr_len = 8;
		mcdi->resp_data_len =
			EFX_DWORD_FIELD(hdr, MC_CMD_V2_EXTN_IN_ACTUAL_LEN);
	}

	if (error && mcdi->resp_data_len == 0) {
		netif_err(efx, hw, efx->net_dev, "MC rebooted\n");
		mcdi->resprc = -EIO;
	} else if ((respseq ^ mcdi->seqno) & SEQ_MASK) {
		netif_err(efx, hw, efx->net_dev,
			  "MC response mismatch tx seq 0x%x rx seq 0x%x\n",
			  respseq, mcdi->seqno);
		mcdi->resprc = -EIO;
	} else if (error) {
		efx->type->mcdi_read_response(efx, &hdr, mcdi->resp_hdr_len, 4);
		mcdi->resprc =
			efx_mcdi_errno(EFX_DWORD_FIELD(hdr, EFX_DWORD_0));
	} else {
		mcdi->resprc = 0;
184 185 186
	}
}

187 188 189
static int efx_mcdi_poll(struct efx_nic *efx)
{
	struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
190
	unsigned long time, finish;
191 192
	unsigned int spins;
	int rc;
193 194

	/* Check for a reboot atomically with respect to efx_mcdi_copyout() */
195
	rc = efx_mcdi_poll_reboot(efx);
196
	if (rc) {
197
		spin_lock_bh(&mcdi->iface_lock);
198 199 200
		mcdi->resprc = rc;
		mcdi->resp_hdr_len = 0;
		mcdi->resp_data_len = 0;
201
		spin_unlock_bh(&mcdi->iface_lock);
202 203
		return 0;
	}
204 205 206 207 208 209

	/* Poll for completion. Poll quickly (once a us) for the 1st jiffy,
	 * because generally mcdi responses are fast. After that, back off
	 * and poll once a jiffy (approximately)
	 */
	spins = TICK_USEC;
210
	finish = jiffies + MCDI_RPC_TIMEOUT;
211 212 213 214 215

	while (1) {
		if (spins != 0) {
			--spins;
			udelay(1);
216 217 218
		} else {
			schedule_timeout_uninterruptible(1);
		}
219

220
		time = jiffies;
221

222
		rmb();
223
		if (efx->type->mcdi_poll_response(efx))
224 225
			break;

226
		if (time_after(time, finish))
227 228 229
			return -ETIMEDOUT;
	}

230
	spin_lock_bh(&mcdi->iface_lock);
231
	efx_mcdi_read_response_header(efx);
232
	spin_unlock_bh(&mcdi->iface_lock);
233 234 235 236 237

	/* Return rc=0 like wait_event_timeout() */
	return 0;
}

238 239 240
/* Test and clear MC-rebooted flag for this port/function; reset
 * software state as necessary.
 */
241 242
int efx_mcdi_poll_reboot(struct efx_nic *efx)
{
243 244
	if (!efx->mcdi)
		return 0;
245

246
	return efx->type->mcdi_poll_reboot(efx);
247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266
}

static void efx_mcdi_acquire(struct efx_mcdi_iface *mcdi)
{
	/* Wait until the interface becomes QUIESCENT and we win the race
	 * to mark it RUNNING. */
	wait_event(mcdi->wq,
		   atomic_cmpxchg(&mcdi->state,
				  MCDI_STATE_QUIESCENT,
				  MCDI_STATE_RUNNING)
		   == MCDI_STATE_QUIESCENT);
}

static int efx_mcdi_await_completion(struct efx_nic *efx)
{
	struct efx_mcdi_iface *mcdi = efx_mcdi(efx);

	if (wait_event_timeout(
		    mcdi->wq,
		    atomic_read(&mcdi->state) == MCDI_STATE_COMPLETED,
267
		    MCDI_RPC_TIMEOUT) == 0)
268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308
		return -ETIMEDOUT;

	/* Check if efx_mcdi_set_mode() switched us back to polled completions.
	 * In which case, poll for completions directly. If efx_mcdi_ev_cpl()
	 * completed the request first, then we'll just end up completing the
	 * request again, which is safe.
	 *
	 * We need an smp_rmb() to synchronise with efx_mcdi_mode_poll(), which
	 * wait_event_timeout() implicitly provides.
	 */
	if (mcdi->mode == MCDI_MODE_POLL)
		return efx_mcdi_poll(efx);

	return 0;
}

static bool efx_mcdi_complete(struct efx_mcdi_iface *mcdi)
{
	/* If the interface is RUNNING, then move to COMPLETED and wake any
	 * waiters. If the interface isn't in RUNNING then we've received a
	 * duplicate completion after we've already transitioned back to
	 * QUIESCENT. [A subsequent invocation would increment seqno, so would
	 * have failed the seqno check].
	 */
	if (atomic_cmpxchg(&mcdi->state,
			   MCDI_STATE_RUNNING,
			   MCDI_STATE_COMPLETED) == MCDI_STATE_RUNNING) {
		wake_up(&mcdi->wq);
		return true;
	}

	return false;
}

static void efx_mcdi_release(struct efx_mcdi_iface *mcdi)
{
	atomic_set(&mcdi->state, MCDI_STATE_QUIESCENT);
	wake_up(&mcdi->wq);
}

static void efx_mcdi_ev_cpl(struct efx_nic *efx, unsigned int seqno,
309
			    unsigned int datalen, unsigned int mcdi_err)
310 311 312 313 314 315 316 317 318 319 320
{
	struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
	bool wake = false;

	spin_lock(&mcdi->iface_lock);

	if ((seqno ^ mcdi->seqno) & SEQ_MASK) {
		if (mcdi->credits)
			/* The request has been cancelled */
			--mcdi->credits;
		else
321 322 323
			netif_err(efx, hw, efx->net_dev,
				  "MC response mismatch tx seq 0x%x rx "
				  "seq 0x%x\n", seqno, mcdi->seqno);
324
	} else {
325 326 327 328 329 330 331 332
		if (efx->type->mcdi_max_ver >= 2) {
			/* MCDI v2 responses don't fit in an event */
			efx_mcdi_read_response_header(efx);
		} else {
			mcdi->resprc = efx_mcdi_errno(mcdi_err);
			mcdi->resp_hdr_len = 4;
			mcdi->resp_data_len = datalen;
		}
333 334 335 336 337 338 339 340 341 342 343

		wake = true;
	}

	spin_unlock(&mcdi->iface_lock);

	if (wake)
		efx_mcdi_complete(mcdi);
}

int efx_mcdi_rpc(struct efx_nic *efx, unsigned cmd,
344 345
		 const efx_dword_t *inbuf, size_t inlen,
		 efx_dword_t *outbuf, size_t outlen,
346
		 size_t *outlen_actual)
347
{
348 349 350 351 352
	int rc;

	rc = efx_mcdi_rpc_start(efx, cmd, inbuf, inlen);
	if (rc)
		return rc;
353 354 355 356
	return efx_mcdi_rpc_finish(efx, cmd, inlen,
				   outbuf, outlen, outlen_actual);
}

357 358
int efx_mcdi_rpc_start(struct efx_nic *efx, unsigned cmd,
		       const efx_dword_t *inbuf, size_t inlen)
359 360
{
	struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
361

362 363 364 365 366 367 368 369 370 371
	if (efx->type->mcdi_max_ver < 0 ||
	     (efx->type->mcdi_max_ver < 2 &&
	      cmd > MC_CMD_CMD_SPACE_ESCAPE_7))
		return -EINVAL;

	if (inlen > MCDI_CTL_SDU_LEN_MAX_V2 ||
	    (efx->type->mcdi_max_ver < 2 &&
	     inlen > MCDI_CTL_SDU_LEN_MAX_V1))
		return -EMSGSIZE;

372 373 374 375 376 377 378 379
	efx_mcdi_acquire(mcdi);

	/* Serialise with efx_mcdi_ev_cpl() and efx_mcdi_ev_death() */
	spin_lock_bh(&mcdi->iface_lock);
	++mcdi->seqno;
	spin_unlock_bh(&mcdi->iface_lock);

	efx_mcdi_copyin(efx, cmd, inbuf, inlen);
380
	mcdi->new_epoch = false;
381
	return 0;
382 383 384
}

int efx_mcdi_rpc_finish(struct efx_nic *efx, unsigned cmd, size_t inlen,
385 386
			efx_dword_t *outbuf, size_t outlen,
			size_t *outlen_actual)
387 388 389 390
{
	struct efx_mcdi_iface *mcdi = efx_mcdi(efx);
	int rc;

391 392 393 394 395 396 397 398 399 400 401 402 403 404 405
	if (mcdi->mode == MCDI_MODE_POLL)
		rc = efx_mcdi_poll(efx);
	else
		rc = efx_mcdi_await_completion(efx);

	if (rc != 0) {
		/* Close the race with efx_mcdi_ev_cpl() executing just too late
		 * and completing a request we've just cancelled, by ensuring
		 * that the seqno check therein fails.
		 */
		spin_lock_bh(&mcdi->iface_lock);
		++mcdi->seqno;
		++mcdi->credits;
		spin_unlock_bh(&mcdi->iface_lock);

406 407 408
		netif_err(efx, hw, efx->net_dev,
			  "MC command 0x%x inlen %d mode %d timed out\n",
			  cmd, (int)inlen, mcdi->mode);
409
	} else {
410
		size_t hdr_len, data_len;
411 412 413 414 415 416

		/* At the very least we need a memory barrier here to ensure
		 * we pick up changes from efx_mcdi_ev_cpl(). Protect against
		 * a spurious efx_mcdi_ev_cpl() running concurrently by
		 * acquiring the iface_lock. */
		spin_lock_bh(&mcdi->iface_lock);
417
		rc = mcdi->resprc;
418 419
		hdr_len = mcdi->resp_hdr_len;
		data_len = mcdi->resp_data_len;
420 421
		spin_unlock_bh(&mcdi->iface_lock);

422 423
		BUG_ON(rc > 0);

424
		if (rc == 0) {
425 426
			efx->type->mcdi_read_response(efx, outbuf, hdr_len,
						      min(outlen, data_len));
427
			if (outlen_actual != NULL)
428
				*outlen_actual = data_len;
429 430 431
		} else if (cmd == MC_CMD_REBOOT && rc == -EIO)
			; /* Don't reset if MC_CMD_REBOOT returns EIO */
		else if (rc == -EIO || rc == -EINTR) {
432 433
			netif_err(efx, hw, efx->net_dev, "MC fatal error %d\n",
				  -rc);
434 435
			efx_schedule_reset(efx, RESET_TYPE_MC_FAILURE);
		} else
436
			netif_dbg(efx, hw, efx->net_dev,
437 438
				  "MC command 0x%x inlen %d failed rc=%d\n",
				  cmd, (int)inlen, -rc);
439 440 441 442

		if (rc == -EIO || rc == -EINTR) {
			msleep(MCDI_STATUS_SLEEP_MS);
			efx_mcdi_poll_reboot(efx);
443
			mcdi->new_epoch = true;
444
		}
445 446 447 448 449 450 451 452 453 454
	}

	efx_mcdi_release(mcdi);
	return rc;
}

void efx_mcdi_mode_poll(struct efx_nic *efx)
{
	struct efx_mcdi_iface *mcdi;

455
	if (!efx->mcdi)
456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478
		return;

	mcdi = efx_mcdi(efx);
	if (mcdi->mode == MCDI_MODE_POLL)
		return;

	/* We can switch from event completion to polled completion, because
	 * mcdi requests are always completed in shared memory. We do this by
	 * switching the mode to POLL'd then completing the request.
	 * efx_mcdi_await_completion() will then call efx_mcdi_poll().
	 *
	 * We need an smp_wmb() to synchronise with efx_mcdi_await_completion(),
	 * which efx_mcdi_complete() provides for us.
	 */
	mcdi->mode = MCDI_MODE_POLL;

	efx_mcdi_complete(mcdi);
}

void efx_mcdi_mode_event(struct efx_nic *efx)
{
	struct efx_mcdi_iface *mcdi;

479
	if (!efx->mcdi)
480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512
		return;

	mcdi = efx_mcdi(efx);

	if (mcdi->mode == MCDI_MODE_EVENTS)
		return;

	/* We can't switch from polled to event completion in the middle of a
	 * request, because the completion method is specified in the request.
	 * So acquire the interface to serialise the requestors. We don't need
	 * to acquire the iface_lock to change the mode here, but we do need a
	 * write memory barrier ensure that efx_mcdi_rpc() sees it, which
	 * efx_mcdi_acquire() provides.
	 */
	efx_mcdi_acquire(mcdi);
	mcdi->mode = MCDI_MODE_EVENTS;
	efx_mcdi_release(mcdi);
}

static void efx_mcdi_ev_death(struct efx_nic *efx, int rc)
{
	struct efx_mcdi_iface *mcdi = efx_mcdi(efx);

	/* If there is an outstanding MCDI request, it has been terminated
	 * either by a BADASSERT or REBOOT event. If the mcdi interface is
	 * in polled mode, then do nothing because the MC reboot handler will
	 * set the header correctly. However, if the mcdi interface is waiting
	 * for a CMDDONE event it won't receive it [and since all MCDI events
	 * are sent to the same queue, we can't be racing with
	 * efx_mcdi_ev_cpl()]
	 *
	 * There's a race here with efx_mcdi_rpc(), because we might receive
	 * a REBOOT event *before* the request has been copied out. In polled
L
Lucas De Marchi 已提交
513
	 * mode (during startup) this is irrelevant, because efx_mcdi_complete()
514 515 516 517 518 519 520 521 522
	 * is ignored. In event mode, this condition is just an edge-case of
	 * receiving a REBOOT event after posting the MCDI request. Did the mc
	 * reboot before or after the copyout? The best we can do always is
	 * just return failure.
	 */
	spin_lock(&mcdi->iface_lock);
	if (efx_mcdi_complete(mcdi)) {
		if (mcdi->mode == MCDI_MODE_EVENTS) {
			mcdi->resprc = rc;
523 524
			mcdi->resp_hdr_len = 0;
			mcdi->resp_data_len = 0;
525
			++mcdi->credits;
526
		}
527 528 529
	} else {
		int count;

530 531 532
		/* Nobody was waiting for an MCDI request, so trigger a reset */
		efx_schedule_reset(efx, RESET_TYPE_MC_FAILURE);

533 534 535 536 537 538
		/* Consume the status word since efx_mcdi_rpc_finish() won't */
		for (count = 0; count < MCDI_STATUS_DELAY_COUNT; ++count) {
			if (efx_mcdi_poll_reboot(efx))
				break;
			udelay(MCDI_STATUS_DELAY_US);
		}
539
		mcdi->new_epoch = true;
540 541
	}

542 543 544 545 546 547 548 549 550 551 552 553 554
	spin_unlock(&mcdi->iface_lock);
}

/* Called from  falcon_process_eventq for MCDI events */
void efx_mcdi_process_event(struct efx_channel *channel,
			    efx_qword_t *event)
{
	struct efx_nic *efx = channel->efx;
	int code = EFX_QWORD_FIELD(*event, MCDI_EVENT_CODE);
	u32 data = EFX_QWORD_FIELD(*event, MCDI_EVENT_DATA);

	switch (code) {
	case MCDI_EVENT_CODE_BADSSERT:
555 556
		netif_err(efx, hw, efx->net_dev,
			  "MC watchdog or assertion failure at 0x%x\n", data);
557
		efx_mcdi_ev_death(efx, -EINTR);
558 559 560
		break;

	case MCDI_EVENT_CODE_PMNOTICE:
561
		netif_info(efx, wol, efx->net_dev, "MCDI PM event.\n");
562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577
		break;

	case MCDI_EVENT_CODE_CMDDONE:
		efx_mcdi_ev_cpl(efx,
				MCDI_EVENT_FIELD(*event, CMDDONE_SEQ),
				MCDI_EVENT_FIELD(*event, CMDDONE_DATALEN),
				MCDI_EVENT_FIELD(*event, CMDDONE_ERRNO));
		break;

	case MCDI_EVENT_CODE_LINKCHANGE:
		efx_mcdi_process_link_change(efx, event);
		break;
	case MCDI_EVENT_CODE_SENSOREVT:
		efx_mcdi_sensor_event(efx, event);
		break;
	case MCDI_EVENT_CODE_SCHEDERR:
578 579
		netif_info(efx, hw, efx->net_dev,
			   "MC Scheduler error address=0x%x\n", data);
580 581
		break;
	case MCDI_EVENT_CODE_REBOOT:
582
		netif_info(efx, hw, efx->net_dev, "MC Reboot\n");
583
		efx_mcdi_ev_death(efx, -EIO);
584 585 586 587
		break;
	case MCDI_EVENT_CODE_MAC_STATS_DMA:
		/* MAC stats are gather lazily.  We can ignore this. */
		break;
588 589 590
	case MCDI_EVENT_CODE_FLR:
		efx_sriov_flr(efx, MCDI_EVENT_FIELD(*event, FLR_VF));
		break;
591 592 593 594 595
	case MCDI_EVENT_CODE_PTP_RX:
	case MCDI_EVENT_CODE_PTP_FAULT:
	case MCDI_EVENT_CODE_PTP_PPS:
		efx_ptp_event(efx, event);
		break;
596

597 598 599 600 601 602 603 604
	case MCDI_EVENT_CODE_TX_ERR:
	case MCDI_EVENT_CODE_RX_ERR:
		netif_err(efx, hw, efx->net_dev,
			  "%s DMA error (event: "EFX_QWORD_FMT")\n",
			  code == MCDI_EVENT_CODE_TX_ERR ? "TX" : "RX",
			  EFX_QWORD_VAL(*event));
		efx_schedule_reset(efx, RESET_TYPE_DMA_ERROR);
		break;
605
	default:
606 607
		netif_err(efx, hw, efx->net_dev, "Unknown MCDI event 0x%x\n",
			  code);
608 609 610 611 612 613 614 615 616 617
	}
}

/**************************************************************************
 *
 * Specific request functions
 *
 **************************************************************************
 */

618
void efx_mcdi_print_fwver(struct efx_nic *efx, char *buf, size_t len)
619
{
620
	MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_VERSION_OUT_LEN);
621 622 623 624 625 626 627 628 629 630 631
	size_t outlength;
	const __le16 *ver_words;
	int rc;

	BUILD_BUG_ON(MC_CMD_GET_VERSION_IN_LEN != 0);

	rc = efx_mcdi_rpc(efx, MC_CMD_GET_VERSION, NULL, 0,
			  outbuf, sizeof(outbuf), &outlength);
	if (rc)
		goto fail;

632
	if (outlength < MC_CMD_GET_VERSION_OUT_LEN) {
633
		rc = -EIO;
634 635 636 637
		goto fail;
	}

	ver_words = (__le16 *)MCDI_PTR(outbuf, GET_VERSION_OUT_VERSION);
638 639 640 641
	snprintf(buf, len, "%u.%u.%u.%u",
		 le16_to_cpu(ver_words[0]), le16_to_cpu(ver_words[1]),
		 le16_to_cpu(ver_words[2]), le16_to_cpu(ver_words[3]));
	return;
642 643

fail:
644
	netif_err(efx, probe, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
645
	buf[0] = 0;
646 647 648 649 650
}

int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating,
			bool *was_attached)
{
651 652
	MCDI_DECLARE_BUF(inbuf, MC_CMD_DRV_ATTACH_IN_LEN);
	MCDI_DECLARE_BUF(outbuf, MC_CMD_DRV_ATTACH_OUT_LEN);
653 654 655 656 657 658
	size_t outlen;
	int rc;

	MCDI_SET_DWORD(inbuf, DRV_ATTACH_IN_NEW_STATE,
		       driver_operating ? 1 : 0);
	MCDI_SET_DWORD(inbuf, DRV_ATTACH_IN_UPDATE, 1);
659
	MCDI_SET_DWORD(inbuf, DRV_ATTACH_IN_FIRMWARE_ID, MC_CMD_FW_LOW_LATENCY);
660 661 662 663 664

	rc = efx_mcdi_rpc(efx, MC_CMD_DRV_ATTACH, inbuf, sizeof(inbuf),
			  outbuf, sizeof(outbuf), &outlen);
	if (rc)
		goto fail;
665 666
	if (outlen < MC_CMD_DRV_ATTACH_OUT_LEN) {
		rc = -EIO;
667
		goto fail;
668
	}
669 670 671 672 673 674

	if (was_attached != NULL)
		*was_attached = MCDI_DWORD(outbuf, DRV_ATTACH_OUT_OLD_STATE);
	return 0;

fail:
675
	netif_err(efx, probe, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
676 677 678 679
	return rc;
}

int efx_mcdi_get_board_cfg(struct efx_nic *efx, u8 *mac_address,
680
			   u16 *fw_subtype_list, u32 *capabilities)
681
{
682
	MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_BOARD_CFG_OUT_LENMAX);
683
	size_t outlen, i;
684 685 686 687 688 689 690 691 692 693
	int port_num = efx_port_num(efx);
	int rc;

	BUILD_BUG_ON(MC_CMD_GET_BOARD_CFG_IN_LEN != 0);

	rc = efx_mcdi_rpc(efx, MC_CMD_GET_BOARD_CFG, NULL, 0,
			  outbuf, sizeof(outbuf), &outlen);
	if (rc)
		goto fail;

694
	if (outlen < MC_CMD_GET_BOARD_CFG_OUT_LENMIN) {
695
		rc = -EIO;
696 697 698 699
		goto fail;
	}

	if (mac_address)
700 701 702 703 704
		memcpy(mac_address,
		       port_num ?
		       MCDI_PTR(outbuf, GET_BOARD_CFG_OUT_MAC_ADDR_BASE_PORT1) :
		       MCDI_PTR(outbuf, GET_BOARD_CFG_OUT_MAC_ADDR_BASE_PORT0),
		       ETH_ALEN);
705 706
	if (fw_subtype_list) {
		for (i = 0;
707 708 709 710 711 712 713
		     i < MCDI_VAR_ARRAY_LEN(outlen,
					    GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST);
		     i++)
			fw_subtype_list[i] = MCDI_ARRAY_WORD(
				outbuf, GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST, i);
		for (; i < MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_MAXNUM; i++)
			fw_subtype_list[i] = 0;
714
	}
715 716 717 718 719 720 721 722
	if (capabilities) {
		if (port_num)
			*capabilities = MCDI_DWORD(outbuf,
					GET_BOARD_CFG_OUT_CAPABILITIES_PORT1);
		else
			*capabilities = MCDI_DWORD(outbuf,
					GET_BOARD_CFG_OUT_CAPABILITIES_PORT0);
	}
723 724 725 726

	return 0;

fail:
727 728
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d len=%d\n",
		  __func__, rc, (int)outlen);
729 730 731 732 733 734

	return rc;
}

int efx_mcdi_log_ctrl(struct efx_nic *efx, bool evq, bool uart, u32 dest_evq)
{
735
	MCDI_DECLARE_BUF(inbuf, MC_CMD_LOG_CTRL_IN_LEN);
736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756
	u32 dest = 0;
	int rc;

	if (uart)
		dest |= MC_CMD_LOG_CTRL_IN_LOG_DEST_UART;
	if (evq)
		dest |= MC_CMD_LOG_CTRL_IN_LOG_DEST_EVQ;

	MCDI_SET_DWORD(inbuf, LOG_CTRL_IN_LOG_DEST, dest);
	MCDI_SET_DWORD(inbuf, LOG_CTRL_IN_LOG_DEST_EVQ, dest_evq);

	BUILD_BUG_ON(MC_CMD_LOG_CTRL_OUT_LEN != 0);

	rc = efx_mcdi_rpc(efx, MC_CMD_LOG_CTRL, inbuf, sizeof(inbuf),
			  NULL, 0, NULL);
	if (rc)
		goto fail;

	return 0;

fail:
757
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
758 759 760 761 762
	return rc;
}

int efx_mcdi_nvram_types(struct efx_nic *efx, u32 *nvram_types_out)
{
763
	MCDI_DECLARE_BUF(outbuf, MC_CMD_NVRAM_TYPES_OUT_LEN);
764 765 766 767 768 769 770 771 772
	size_t outlen;
	int rc;

	BUILD_BUG_ON(MC_CMD_NVRAM_TYPES_IN_LEN != 0);

	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_TYPES, NULL, 0,
			  outbuf, sizeof(outbuf), &outlen);
	if (rc)
		goto fail;
773 774
	if (outlen < MC_CMD_NVRAM_TYPES_OUT_LEN) {
		rc = -EIO;
775
		goto fail;
776
	}
777 778 779 780 781

	*nvram_types_out = MCDI_DWORD(outbuf, NVRAM_TYPES_OUT_TYPES);
	return 0;

fail:
782 783
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n",
		  __func__, rc);
784 785 786 787 788 789 790
	return rc;
}

int efx_mcdi_nvram_info(struct efx_nic *efx, unsigned int type,
			size_t *size_out, size_t *erase_size_out,
			bool *protected_out)
{
791 792
	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_INFO_IN_LEN);
	MCDI_DECLARE_BUF(outbuf, MC_CMD_NVRAM_INFO_OUT_LEN);
793 794 795 796 797 798 799 800 801
	size_t outlen;
	int rc;

	MCDI_SET_DWORD(inbuf, NVRAM_INFO_IN_TYPE, type);

	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_INFO, inbuf, sizeof(inbuf),
			  outbuf, sizeof(outbuf), &outlen);
	if (rc)
		goto fail;
802 803
	if (outlen < MC_CMD_NVRAM_INFO_OUT_LEN) {
		rc = -EIO;
804
		goto fail;
805
	}
806 807 808 809

	*size_out = MCDI_DWORD(outbuf, NVRAM_INFO_OUT_SIZE);
	*erase_size_out = MCDI_DWORD(outbuf, NVRAM_INFO_OUT_ERASESIZE);
	*protected_out = !!(MCDI_DWORD(outbuf, NVRAM_INFO_OUT_FLAGS) &
810
				(1 << MC_CMD_NVRAM_INFO_OUT_PROTECTED_LBN));
811 812 813
	return 0;

fail:
814
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
815 816 817
	return rc;
}

818 819
static int efx_mcdi_nvram_test(struct efx_nic *efx, unsigned int type)
{
820 821
	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_TEST_IN_LEN);
	MCDI_DECLARE_BUF(outbuf, MC_CMD_NVRAM_TEST_OUT_LEN);
822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847
	int rc;

	MCDI_SET_DWORD(inbuf, NVRAM_TEST_IN_TYPE, type);

	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_TEST, inbuf, sizeof(inbuf),
			  outbuf, sizeof(outbuf), NULL);
	if (rc)
		return rc;

	switch (MCDI_DWORD(outbuf, NVRAM_TEST_OUT_RESULT)) {
	case MC_CMD_NVRAM_TEST_PASS:
	case MC_CMD_NVRAM_TEST_NOTSUPP:
		return 0;
	default:
		return -EIO;
	}
}

int efx_mcdi_nvram_test_all(struct efx_nic *efx)
{
	u32 nvram_types;
	unsigned int type;
	int rc;

	rc = efx_mcdi_nvram_types(efx, &nvram_types);
	if (rc)
848
		goto fail1;
849 850 851 852 853 854

	type = 0;
	while (nvram_types != 0) {
		if (nvram_types & 1) {
			rc = efx_mcdi_nvram_test(efx, type);
			if (rc)
855
				goto fail2;
856 857 858 859 860 861
		}
		type++;
		nvram_types >>= 1;
	}

	return 0;
862 863

fail2:
864 865
	netif_err(efx, hw, efx->net_dev, "%s: failed type=%u\n",
		  __func__, type);
866
fail1:
867
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
868
	return rc;
869 870
}

871
static int efx_mcdi_read_assertion(struct efx_nic *efx)
872
{
873 874
	MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_ASSERTS_IN_LEN);
	MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_ASSERTS_OUT_LEN);
875
	unsigned int flags, index;
876 877 878 879 880
	const char *reason;
	size_t outlen;
	int retry;
	int rc;

881 882
	/* Attempt to read any stored assertion state before we reboot
	 * the mcfw out of the assertion handler. Retry twice, once
883 884 885 886 887
	 * because a boot-time assertion might cause this command to fail
	 * with EINTR. And once again because GET_ASSERTS can race with
	 * MC_CMD_REBOOT running on the other port. */
	retry = 2;
	do {
888
		MCDI_SET_DWORD(inbuf, GET_ASSERTS_IN_CLEAR, 1);
889
		rc = efx_mcdi_rpc(efx, MC_CMD_GET_ASSERTS,
890 891
				  inbuf, MC_CMD_GET_ASSERTS_IN_LEN,
				  outbuf, sizeof(outbuf), &outlen);
892 893 894 895 896
	} while ((rc == -EINTR || rc == -EIO) && retry-- > 0);

	if (rc)
		return rc;
	if (outlen < MC_CMD_GET_ASSERTS_OUT_LEN)
897
		return -EIO;
898

899 900
	/* Print out any recorded assertion state */
	flags = MCDI_DWORD(outbuf, GET_ASSERTS_OUT_GLOBAL_FLAGS);
901 902 903 904 905 906 907 908 909 910
	if (flags == MC_CMD_GET_ASSERTS_FLAGS_NO_FAILS)
		return 0;

	reason = (flags == MC_CMD_GET_ASSERTS_FLAGS_SYS_FAIL)
		? "system-level assertion"
		: (flags == MC_CMD_GET_ASSERTS_FLAGS_THR_FAIL)
		? "thread-level assertion"
		: (flags == MC_CMD_GET_ASSERTS_FLAGS_WDOG_FIRED)
		? "watchdog reset"
		: "unknown assertion";
911 912 913 914
	netif_err(efx, hw, efx->net_dev,
		  "MCPU %s at PC = 0x%.8x in thread 0x%.8x\n", reason,
		  MCDI_DWORD(outbuf, GET_ASSERTS_OUT_SAVED_PC_OFFS),
		  MCDI_DWORD(outbuf, GET_ASSERTS_OUT_THREAD_OFFS));
915 916

	/* Print out the registers */
917 918 919 920 921 922 923
	for (index = 0;
	     index < MC_CMD_GET_ASSERTS_OUT_GP_REGS_OFFS_NUM;
	     index++)
		netif_err(efx, hw, efx->net_dev, "R%.2d (?): 0x%.8x\n",
			  1 + index,
			  MCDI_ARRAY_DWORD(outbuf, GET_ASSERTS_OUT_GP_REGS_OFFS,
					   index));
924 925 926 927

	return 0;
}

928 929
static void efx_mcdi_exit_assertion(struct efx_nic *efx)
{
930
	MCDI_DECLARE_BUF(inbuf, MC_CMD_REBOOT_IN_LEN);
931

932 933 934 935 936 937
	/* If the MC is running debug firmware, it might now be
	 * waiting for a debugger to attach, but we just want it to
	 * reboot.  We set a flag that makes the command a no-op if it
	 * has already done so.  We don't know what return code to
	 * expect (0 or -EIO), so ignore it.
	 */
938 939 940
	BUILD_BUG_ON(MC_CMD_REBOOT_OUT_LEN != 0);
	MCDI_SET_DWORD(inbuf, REBOOT_IN_FLAGS,
		       MC_CMD_REBOOT_FLAGS_AFTER_ASSERTION);
941 942
	(void) efx_mcdi_rpc(efx, MC_CMD_REBOOT, inbuf, MC_CMD_REBOOT_IN_LEN,
			    NULL, 0, NULL);
943 944 945 946 947 948 949 950 951 952 953 954 955 956 957
}

int efx_mcdi_handle_assertion(struct efx_nic *efx)
{
	int rc;

	rc = efx_mcdi_read_assertion(efx);
	if (rc)
		return rc;

	efx_mcdi_exit_assertion(efx);

	return 0;
}

958 959
void efx_mcdi_set_id_led(struct efx_nic *efx, enum efx_led_mode mode)
{
960
	MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_ID_LED_IN_LEN);
961 962 963 964 965 966 967 968 969 970 971 972 973
	int rc;

	BUILD_BUG_ON(EFX_LED_OFF != MC_CMD_LED_OFF);
	BUILD_BUG_ON(EFX_LED_ON != MC_CMD_LED_ON);
	BUILD_BUG_ON(EFX_LED_DEFAULT != MC_CMD_LED_DEFAULT);

	BUILD_BUG_ON(MC_CMD_SET_ID_LED_OUT_LEN != 0);

	MCDI_SET_DWORD(inbuf, SET_ID_LED_IN_STATE, mode);

	rc = efx_mcdi_rpc(efx, MC_CMD_SET_ID_LED, inbuf, sizeof(inbuf),
			  NULL, 0, NULL);
	if (rc)
974 975
		netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n",
			  __func__, rc);
976 977
}

978
static int efx_mcdi_reset_port(struct efx_nic *efx)
979
{
980
	int rc = efx_mcdi_rpc(efx, MC_CMD_ENTITY_RESET, NULL, 0, NULL, 0, NULL);
981
	if (rc)
982 983
		netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n",
			  __func__, rc);
984 985 986
	return rc;
}

987
static int efx_mcdi_reset_mc(struct efx_nic *efx)
988
{
989
	MCDI_DECLARE_BUF(inbuf, MC_CMD_REBOOT_IN_LEN);
990 991 992 993 994 995 996 997 998 999 1000
	int rc;

	BUILD_BUG_ON(MC_CMD_REBOOT_OUT_LEN != 0);
	MCDI_SET_DWORD(inbuf, REBOOT_IN_FLAGS, 0);
	rc = efx_mcdi_rpc(efx, MC_CMD_REBOOT, inbuf, sizeof(inbuf),
			  NULL, 0, NULL);
	/* White is black, and up is down */
	if (rc == -EIO)
		return 0;
	if (rc == 0)
		rc = -EIO;
1001
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
1002 1003 1004
	return rc;
}

1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
enum reset_type efx_mcdi_map_reset_reason(enum reset_type reason)
{
	return RESET_TYPE_RECOVER_OR_ALL;
}

int efx_mcdi_reset(struct efx_nic *efx, enum reset_type method)
{
	int rc;

	/* Recover from a failed assertion pre-reset */
	rc = efx_mcdi_handle_assertion(efx);
	if (rc)
		return rc;

	if (method == RESET_TYPE_WORLD)
		return efx_mcdi_reset_mc(efx);
	else
		return efx_mcdi_reset_port(efx);
}

1025 1026
static int efx_mcdi_wol_filter_set(struct efx_nic *efx, u32 type,
				   const u8 *mac, int *id_out)
1027
{
1028 1029
	MCDI_DECLARE_BUF(inbuf, MC_CMD_WOL_FILTER_SET_IN_LEN);
	MCDI_DECLARE_BUF(outbuf, MC_CMD_WOL_FILTER_SET_OUT_LEN);
1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043
	size_t outlen;
	int rc;

	MCDI_SET_DWORD(inbuf, WOL_FILTER_SET_IN_WOL_TYPE, type);
	MCDI_SET_DWORD(inbuf, WOL_FILTER_SET_IN_FILTER_MODE,
		       MC_CMD_FILTER_MODE_SIMPLE);
	memcpy(MCDI_PTR(inbuf, WOL_FILTER_SET_IN_MAGIC_MAC), mac, ETH_ALEN);

	rc = efx_mcdi_rpc(efx, MC_CMD_WOL_FILTER_SET, inbuf, sizeof(inbuf),
			  outbuf, sizeof(outbuf), &outlen);
	if (rc)
		goto fail;

	if (outlen < MC_CMD_WOL_FILTER_SET_OUT_LEN) {
1044
		rc = -EIO;
1045 1046 1047 1048 1049 1050 1051 1052 1053
		goto fail;
	}

	*id_out = (int)MCDI_DWORD(outbuf, WOL_FILTER_SET_OUT_FILTER_ID);

	return 0;

fail:
	*id_out = -1;
1054
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068
	return rc;

}


int
efx_mcdi_wol_filter_set_magic(struct efx_nic *efx,  const u8 *mac, int *id_out)
{
	return efx_mcdi_wol_filter_set(efx, MC_CMD_WOL_TYPE_MAGIC, mac, id_out);
}


int efx_mcdi_wol_filter_get_magic(struct efx_nic *efx, int *id_out)
{
1069
	MCDI_DECLARE_BUF(outbuf, MC_CMD_WOL_FILTER_GET_OUT_LEN);
1070 1071 1072 1073 1074 1075 1076 1077 1078
	size_t outlen;
	int rc;

	rc = efx_mcdi_rpc(efx, MC_CMD_WOL_FILTER_GET, NULL, 0,
			  outbuf, sizeof(outbuf), &outlen);
	if (rc)
		goto fail;

	if (outlen < MC_CMD_WOL_FILTER_GET_OUT_LEN) {
1079
		rc = -EIO;
1080 1081 1082 1083 1084 1085 1086 1087 1088
		goto fail;
	}

	*id_out = (int)MCDI_DWORD(outbuf, WOL_FILTER_GET_OUT_FILTER_ID);

	return 0;

fail:
	*id_out = -1;
1089
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
1090 1091 1092 1093 1094 1095
	return rc;
}


int efx_mcdi_wol_filter_remove(struct efx_nic *efx, int id)
{
1096
	MCDI_DECLARE_BUF(inbuf, MC_CMD_WOL_FILTER_REMOVE_IN_LEN);
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108
	int rc;

	MCDI_SET_DWORD(inbuf, WOL_FILTER_REMOVE_IN_FILTER_ID, (u32)id);

	rc = efx_mcdi_rpc(efx, MC_CMD_WOL_FILTER_REMOVE, inbuf, sizeof(inbuf),
			  NULL, 0, NULL);
	if (rc)
		goto fail;

	return 0;

fail:
1109
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
1110 1111 1112
	return rc;
}

1113 1114 1115 1116
int efx_mcdi_flush_rxqs(struct efx_nic *efx)
{
	struct efx_channel *channel;
	struct efx_rx_queue *rx_queue;
1117 1118
	MCDI_DECLARE_BUF(inbuf,
			 MC_CMD_FLUSH_RX_QUEUES_IN_LEN(EFX_MAX_CHANNELS));
1119 1120
	int rc, count;

1121 1122 1123
	BUILD_BUG_ON(EFX_MAX_CHANNELS >
		     MC_CMD_FLUSH_RX_QUEUES_IN_QID_OFST_MAXNUM);

1124 1125 1126 1127 1128 1129
	count = 0;
	efx_for_each_channel(channel, efx) {
		efx_for_each_channel_rx_queue(rx_queue, channel) {
			if (rx_queue->flush_pending) {
				rx_queue->flush_pending = false;
				atomic_dec(&efx->rxq_flush_pending);
1130 1131 1132 1133
				MCDI_SET_ARRAY_DWORD(
					inbuf, FLUSH_RX_QUEUES_IN_QID_OFST,
					count, efx_rx_queue_index(rx_queue));
				count++;
1134 1135 1136 1137
			}
		}
	}

1138 1139
	rc = efx_mcdi_rpc(efx, MC_CMD_FLUSH_RX_QUEUES, inbuf,
			  MC_CMD_FLUSH_RX_QUEUES_IN_LEN(count), NULL, 0, NULL);
1140
	WARN_ON(rc < 0);
1141 1142 1143

	return rc;
}
1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155

int efx_mcdi_wol_filter_reset(struct efx_nic *efx)
{
	int rc;

	rc = efx_mcdi_rpc(efx, MC_CMD_WOL_FILTER_RESET, NULL, 0, NULL, 0, NULL);
	if (rc)
		goto fail;

	return 0;

fail:
1156
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
1157 1158 1159
	return rc;
}

1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392
#ifdef CONFIG_SFC_MTD

#define EFX_MCDI_NVRAM_LEN_MAX 128

static int efx_mcdi_nvram_update_start(struct efx_nic *efx, unsigned int type)
{
	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_UPDATE_START_IN_LEN);
	int rc;

	MCDI_SET_DWORD(inbuf, NVRAM_UPDATE_START_IN_TYPE, type);

	BUILD_BUG_ON(MC_CMD_NVRAM_UPDATE_START_OUT_LEN != 0);

	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_UPDATE_START, inbuf, sizeof(inbuf),
			  NULL, 0, NULL);
	if (rc)
		goto fail;

	return 0;

fail:
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
	return rc;
}

static int efx_mcdi_nvram_read(struct efx_nic *efx, unsigned int type,
			       loff_t offset, u8 *buffer, size_t length)
{
	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_READ_IN_LEN);
	MCDI_DECLARE_BUF(outbuf,
			 MC_CMD_NVRAM_READ_OUT_LEN(EFX_MCDI_NVRAM_LEN_MAX));
	size_t outlen;
	int rc;

	MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_TYPE, type);
	MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_OFFSET, offset);
	MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_LENGTH, length);

	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_READ, inbuf, sizeof(inbuf),
			  outbuf, sizeof(outbuf), &outlen);
	if (rc)
		goto fail;

	memcpy(buffer, MCDI_PTR(outbuf, NVRAM_READ_OUT_READ_BUFFER), length);
	return 0;

fail:
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
	return rc;
}

static int efx_mcdi_nvram_write(struct efx_nic *efx, unsigned int type,
				loff_t offset, const u8 *buffer, size_t length)
{
	MCDI_DECLARE_BUF(inbuf,
			 MC_CMD_NVRAM_WRITE_IN_LEN(EFX_MCDI_NVRAM_LEN_MAX));
	int rc;

	MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_TYPE, type);
	MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_OFFSET, offset);
	MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_LENGTH, length);
	memcpy(MCDI_PTR(inbuf, NVRAM_WRITE_IN_WRITE_BUFFER), buffer, length);

	BUILD_BUG_ON(MC_CMD_NVRAM_WRITE_OUT_LEN != 0);

	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_WRITE, inbuf,
			  ALIGN(MC_CMD_NVRAM_WRITE_IN_LEN(length), 4),
			  NULL, 0, NULL);
	if (rc)
		goto fail;

	return 0;

fail:
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
	return rc;
}

static int efx_mcdi_nvram_erase(struct efx_nic *efx, unsigned int type,
				loff_t offset, size_t length)
{
	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_ERASE_IN_LEN);
	int rc;

	MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_TYPE, type);
	MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_OFFSET, offset);
	MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_LENGTH, length);

	BUILD_BUG_ON(MC_CMD_NVRAM_ERASE_OUT_LEN != 0);

	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_ERASE, inbuf, sizeof(inbuf),
			  NULL, 0, NULL);
	if (rc)
		goto fail;

	return 0;

fail:
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
	return rc;
}

static int efx_mcdi_nvram_update_finish(struct efx_nic *efx, unsigned int type)
{
	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_UPDATE_FINISH_IN_LEN);
	int rc;

	MCDI_SET_DWORD(inbuf, NVRAM_UPDATE_FINISH_IN_TYPE, type);

	BUILD_BUG_ON(MC_CMD_NVRAM_UPDATE_FINISH_OUT_LEN != 0);

	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_UPDATE_FINISH, inbuf, sizeof(inbuf),
			  NULL, 0, NULL);
	if (rc)
		goto fail;

	return 0;

fail:
	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
	return rc;
}

int efx_mcdi_mtd_read(struct mtd_info *mtd, loff_t start,
		      size_t len, size_t *retlen, u8 *buffer)
{
	struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd);
	struct efx_nic *efx = mtd->priv;
	loff_t offset = start;
	loff_t end = min_t(loff_t, start + len, mtd->size);
	size_t chunk;
	int rc = 0;

	while (offset < end) {
		chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX);
		rc = efx_mcdi_nvram_read(efx, part->nvram_type, offset,
					 buffer, chunk);
		if (rc)
			goto out;
		offset += chunk;
		buffer += chunk;
	}
out:
	*retlen = offset - start;
	return rc;
}

int efx_mcdi_mtd_erase(struct mtd_info *mtd, loff_t start, size_t len)
{
	struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd);
	struct efx_nic *efx = mtd->priv;
	loff_t offset = start & ~((loff_t)(mtd->erasesize - 1));
	loff_t end = min_t(loff_t, start + len, mtd->size);
	size_t chunk = part->common.mtd.erasesize;
	int rc = 0;

	if (!part->updating) {
		rc = efx_mcdi_nvram_update_start(efx, part->nvram_type);
		if (rc)
			goto out;
		part->updating = true;
	}

	/* The MCDI interface can in fact do multiple erase blocks at once;
	 * but erasing may be slow, so we make multiple calls here to avoid
	 * tripping the MCDI RPC timeout. */
	while (offset < end) {
		rc = efx_mcdi_nvram_erase(efx, part->nvram_type, offset,
					  chunk);
		if (rc)
			goto out;
		offset += chunk;
	}
out:
	return rc;
}

int efx_mcdi_mtd_write(struct mtd_info *mtd, loff_t start,
		       size_t len, size_t *retlen, const u8 *buffer)
{
	struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd);
	struct efx_nic *efx = mtd->priv;
	loff_t offset = start;
	loff_t end = min_t(loff_t, start + len, mtd->size);
	size_t chunk;
	int rc = 0;

	if (!part->updating) {
		rc = efx_mcdi_nvram_update_start(efx, part->nvram_type);
		if (rc)
			goto out;
		part->updating = true;
	}

	while (offset < end) {
		chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX);
		rc = efx_mcdi_nvram_write(efx, part->nvram_type, offset,
					  buffer, chunk);
		if (rc)
			goto out;
		offset += chunk;
		buffer += chunk;
	}
out:
	*retlen = offset - start;
	return rc;
}

int efx_mcdi_mtd_sync(struct mtd_info *mtd)
{
	struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd);
	struct efx_nic *efx = mtd->priv;
	int rc = 0;

	if (part->updating) {
		part->updating = false;
		rc = efx_mcdi_nvram_update_finish(efx, part->nvram_type);
	}

	return rc;
}

void efx_mcdi_mtd_rename(struct efx_mtd_partition *part)
{
	struct efx_mcdi_mtd_partition *mcdi_part =
		container_of(part, struct efx_mcdi_mtd_partition, common);
	struct efx_nic *efx = part->mtd.priv;

	snprintf(part->name, sizeof(part->name), "%s %s:%02x",
		 efx->name, part->type_name, mcdi_part->fw_subtype);
}

#endif /* CONFIG_SFC_MTD */
新手
引导
客服 返回
顶部