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1// SPDX-License-Identifier: GPL-2.0-only2/****************************************************************************3 * Driver for Solarflare network controllers and boards4 * Copyright 2008-2013 Solarflare Communications Inc.5 */6 7#include <linux/delay.h>8#include <linux/moduleparam.h>9#include <linux/atomic.h>10#include "net_driver.h"11#include "nic.h"12#include "io.h"13#include "farch_regs.h"14#include "mcdi_pcol.h"15 16/**************************************************************************17 *18 * Management-Controller-to-Driver Interface19 *20 **************************************************************************21 */22 23#define MCDI_RPC_TIMEOUT (10 * HZ)24 25/* A reboot/assertion causes the MCDI status word to be set after the26 * command word is set or a REBOOT event is sent. If we notice a reboot27 * via these mechanisms then wait 250ms for the status word to be set.28 */29#define MCDI_STATUS_DELAY_US 10030#define MCDI_STATUS_DELAY_COUNT 250031#define MCDI_STATUS_SLEEP_MS \32 (MCDI_STATUS_DELAY_US * MCDI_STATUS_DELAY_COUNT / 1000)33 34#define SEQ_MASK \35 EFX_MASK32(EFX_WIDTH(MCDI_HEADER_SEQ))36 37struct efx_mcdi_async_param {38 struct list_head list;39 unsigned int cmd;40 size_t inlen;41 size_t outlen;42 bool quiet;43 efx_mcdi_async_completer *complete;44 unsigned long cookie;45 /* followed by request/response buffer */46};47 48static void efx_mcdi_timeout_async(struct timer_list *t);49static int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating,50 bool *was_attached_out);51static bool efx_mcdi_poll_once(struct efx_nic *efx);52static void efx_mcdi_abandon(struct efx_nic *efx);53 54#ifdef CONFIG_SFC_SIENA_MCDI_LOGGING55static bool efx_siena_mcdi_logging_default;56module_param_named(mcdi_logging_default, efx_siena_mcdi_logging_default,57 bool, 0644);58MODULE_PARM_DESC(mcdi_logging_default,59 "Enable MCDI logging on newly-probed functions");60#endif61 62int efx_siena_mcdi_init(struct efx_nic *efx)63{64 struct efx_mcdi_iface *mcdi;65 bool already_attached;66 int rc = -ENOMEM;67 68 efx->mcdi = kzalloc(sizeof(*efx->mcdi), GFP_KERNEL);69 if (!efx->mcdi)70 goto fail;71 72 mcdi = efx_mcdi(efx);73 mcdi->efx = efx;74#ifdef CONFIG_SFC_SIENA_MCDI_LOGGING75 /* consuming code assumes buffer is page-sized */76 mcdi->logging_buffer = (char *)__get_free_page(GFP_KERNEL);77 if (!mcdi->logging_buffer)78 goto fail1;79 mcdi->logging_enabled = efx_siena_mcdi_logging_default;80#endif81 init_waitqueue_head(&mcdi->wq);82 init_waitqueue_head(&mcdi->proxy_rx_wq);83 spin_lock_init(&mcdi->iface_lock);84 mcdi->state = MCDI_STATE_QUIESCENT;85 mcdi->mode = MCDI_MODE_POLL;86 spin_lock_init(&mcdi->async_lock);87 INIT_LIST_HEAD(&mcdi->async_list);88 timer_setup(&mcdi->async_timer, efx_mcdi_timeout_async, 0);89 90 (void)efx_siena_mcdi_poll_reboot(efx);91 mcdi->new_epoch = true;92 93 /* Recover from a failed assertion before probing */94 rc = efx_siena_mcdi_handle_assertion(efx);95 if (rc)96 goto fail2;97 98 /* Let the MC (and BMC, if this is a LOM) know that the driver99 * is loaded. We should do this before we reset the NIC.100 */101 rc = efx_mcdi_drv_attach(efx, true, &already_attached);102 if (rc) {103 netif_err(efx, probe, efx->net_dev,104 "Unable to register driver with MCPU\n");105 goto fail2;106 }107 if (already_attached)108 /* Not a fatal error */109 netif_err(efx, probe, efx->net_dev,110 "Host already registered with MCPU\n");111 112 if (efx->mcdi->fn_flags &113 (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_PRIMARY))114 efx->primary = efx;115 116 return 0;117fail2:118#ifdef CONFIG_SFC_SIENA_MCDI_LOGGING119 free_page((unsigned long)mcdi->logging_buffer);120fail1:121#endif122 kfree(efx->mcdi);123 efx->mcdi = NULL;124fail:125 return rc;126}127 128void efx_siena_mcdi_detach(struct efx_nic *efx)129{130 if (!efx->mcdi)131 return;132 133 BUG_ON(efx->mcdi->iface.state != MCDI_STATE_QUIESCENT);134 135 /* Relinquish the device (back to the BMC, if this is a LOM) */136 efx_mcdi_drv_attach(efx, false, NULL);137}138 139void efx_siena_mcdi_fini(struct efx_nic *efx)140{141 if (!efx->mcdi)142 return;143 144#ifdef CONFIG_SFC_SIENA_MCDI_LOGGING145 free_page((unsigned long)efx->mcdi->iface.logging_buffer);146#endif147 148 kfree(efx->mcdi);149}150 151static void efx_mcdi_send_request(struct efx_nic *efx, unsigned cmd,152 const efx_dword_t *inbuf, size_t inlen)153{154 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);155#ifdef CONFIG_SFC_SIENA_MCDI_LOGGING156 char *buf = mcdi->logging_buffer; /* page-sized */157#endif158 efx_dword_t hdr[2];159 size_t hdr_len;160 u32 xflags, seqno;161 162 BUG_ON(mcdi->state == MCDI_STATE_QUIESCENT);163 164 /* Serialise with efx_mcdi_ev_cpl() and efx_mcdi_ev_death() */165 spin_lock_bh(&mcdi->iface_lock);166 ++mcdi->seqno;167 seqno = mcdi->seqno & SEQ_MASK;168 spin_unlock_bh(&mcdi->iface_lock);169 170 xflags = 0;171 if (mcdi->mode == MCDI_MODE_EVENTS)172 xflags |= MCDI_HEADER_XFLAGS_EVREQ;173 174 if (efx->type->mcdi_max_ver == 1) {175 /* MCDI v1 */176 EFX_POPULATE_DWORD_7(hdr[0],177 MCDI_HEADER_RESPONSE, 0,178 MCDI_HEADER_RESYNC, 1,179 MCDI_HEADER_CODE, cmd,180 MCDI_HEADER_DATALEN, inlen,181 MCDI_HEADER_SEQ, seqno,182 MCDI_HEADER_XFLAGS, xflags,183 MCDI_HEADER_NOT_EPOCH, !mcdi->new_epoch);184 hdr_len = 4;185 } else {186 /* MCDI v2 */187 BUG_ON(inlen > MCDI_CTL_SDU_LEN_MAX_V2);188 EFX_POPULATE_DWORD_7(hdr[0],189 MCDI_HEADER_RESPONSE, 0,190 MCDI_HEADER_RESYNC, 1,191 MCDI_HEADER_CODE, MC_CMD_V2_EXTN,192 MCDI_HEADER_DATALEN, 0,193 MCDI_HEADER_SEQ, seqno,194 MCDI_HEADER_XFLAGS, xflags,195 MCDI_HEADER_NOT_EPOCH, !mcdi->new_epoch);196 EFX_POPULATE_DWORD_2(hdr[1],197 MC_CMD_V2_EXTN_IN_EXTENDED_CMD, cmd,198 MC_CMD_V2_EXTN_IN_ACTUAL_LEN, inlen);199 hdr_len = 8;200 }201 202#ifdef CONFIG_SFC_SIENA_MCDI_LOGGING203 if (mcdi->logging_enabled && !WARN_ON_ONCE(!buf)) {204 int bytes = 0;205 int i;206 /* Lengths should always be a whole number of dwords, so scream207 * if they're not.208 */209 WARN_ON_ONCE(hdr_len % 4);210 WARN_ON_ONCE(inlen % 4);211 212 /* We own the logging buffer, as only one MCDI can be in213 * progress on a NIC at any one time. So no need for locking.214 */215 for (i = 0; i < hdr_len / 4 && bytes < PAGE_SIZE; i++)216 bytes += scnprintf(buf + bytes, PAGE_SIZE - bytes,217 " %08x",218 le32_to_cpu(hdr[i].u32[0]));219 220 for (i = 0; i < inlen / 4 && bytes < PAGE_SIZE; i++)221 bytes += scnprintf(buf + bytes, PAGE_SIZE - bytes,222 " %08x",223 le32_to_cpu(inbuf[i].u32[0]));224 225 netif_info(efx, hw, efx->net_dev, "MCDI RPC REQ:%s\n", buf);226 }227#endif228 229 efx->type->mcdi_request(efx, hdr, hdr_len, inbuf, inlen);230 231 mcdi->new_epoch = false;232}233 234static int efx_mcdi_errno(unsigned int mcdi_err)235{236 switch (mcdi_err) {237 case 0:238 return 0;239#define TRANSLATE_ERROR(name) \240 case MC_CMD_ERR_ ## name: \241 return -name;242 TRANSLATE_ERROR(EPERM);243 TRANSLATE_ERROR(ENOENT);244 TRANSLATE_ERROR(EINTR);245 TRANSLATE_ERROR(EAGAIN);246 TRANSLATE_ERROR(EACCES);247 TRANSLATE_ERROR(EBUSY);248 TRANSLATE_ERROR(EINVAL);249 TRANSLATE_ERROR(EDEADLK);250 TRANSLATE_ERROR(ENOSYS);251 TRANSLATE_ERROR(ETIME);252 TRANSLATE_ERROR(EALREADY);253 TRANSLATE_ERROR(ENOSPC);254#undef TRANSLATE_ERROR255 case MC_CMD_ERR_ENOTSUP:256 return -EOPNOTSUPP;257 case MC_CMD_ERR_ALLOC_FAIL:258 return -ENOBUFS;259 case MC_CMD_ERR_MAC_EXIST:260 return -EADDRINUSE;261 default:262 return -EPROTO;263 }264}265 266static void efx_mcdi_read_response_header(struct efx_nic *efx)267{268 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);269 unsigned int respseq, respcmd, error;270#ifdef CONFIG_SFC_SIENA_MCDI_LOGGING271 char *buf = mcdi->logging_buffer; /* page-sized */272#endif273 efx_dword_t hdr;274 275 efx->type->mcdi_read_response(efx, &hdr, 0, 4);276 respseq = EFX_DWORD_FIELD(hdr, MCDI_HEADER_SEQ);277 respcmd = EFX_DWORD_FIELD(hdr, MCDI_HEADER_CODE);278 error = EFX_DWORD_FIELD(hdr, MCDI_HEADER_ERROR);279 280 if (respcmd != MC_CMD_V2_EXTN) {281 mcdi->resp_hdr_len = 4;282 mcdi->resp_data_len = EFX_DWORD_FIELD(hdr, MCDI_HEADER_DATALEN);283 } else {284 efx->type->mcdi_read_response(efx, &hdr, 4, 4);285 mcdi->resp_hdr_len = 8;286 mcdi->resp_data_len =287 EFX_DWORD_FIELD(hdr, MC_CMD_V2_EXTN_IN_ACTUAL_LEN);288 }289 290#ifdef CONFIG_SFC_SIENA_MCDI_LOGGING291 if (mcdi->logging_enabled && !WARN_ON_ONCE(!buf)) {292 size_t hdr_len, data_len;293 int bytes = 0;294 int i;295 296 WARN_ON_ONCE(mcdi->resp_hdr_len % 4);297 hdr_len = mcdi->resp_hdr_len / 4;298 /* MCDI_DECLARE_BUF ensures that underlying buffer is padded299 * to dword size, and the MCDI buffer is always dword size300 */301 data_len = DIV_ROUND_UP(mcdi->resp_data_len, 4);302 303 /* We own the logging buffer, as only one MCDI can be in304 * progress on a NIC at any one time. So no need for locking.305 */306 for (i = 0; i < hdr_len && bytes < PAGE_SIZE; i++) {307 efx->type->mcdi_read_response(efx, &hdr, (i * 4), 4);308 bytes += scnprintf(buf + bytes, PAGE_SIZE - bytes,309 " %08x", le32_to_cpu(hdr.u32[0]));310 }311 312 for (i = 0; i < data_len && bytes < PAGE_SIZE; i++) {313 efx->type->mcdi_read_response(efx, &hdr,314 mcdi->resp_hdr_len + (i * 4), 4);315 bytes += scnprintf(buf + bytes, PAGE_SIZE - bytes,316 " %08x", le32_to_cpu(hdr.u32[0]));317 }318 319 netif_info(efx, hw, efx->net_dev, "MCDI RPC RESP:%s\n", buf);320 }321#endif322 323 mcdi->resprc_raw = 0;324 if (error && mcdi->resp_data_len == 0) {325 netif_err(efx, hw, efx->net_dev, "MC rebooted\n");326 mcdi->resprc = -EIO;327 } else if ((respseq ^ mcdi->seqno) & SEQ_MASK) {328 netif_err(efx, hw, efx->net_dev,329 "MC response mismatch tx seq 0x%x rx seq 0x%x\n",330 respseq, mcdi->seqno);331 mcdi->resprc = -EIO;332 } else if (error) {333 efx->type->mcdi_read_response(efx, &hdr, mcdi->resp_hdr_len, 4);334 mcdi->resprc_raw = EFX_DWORD_FIELD(hdr, EFX_DWORD_0);335 mcdi->resprc = efx_mcdi_errno(mcdi->resprc_raw);336 } else {337 mcdi->resprc = 0;338 }339}340 341static bool efx_mcdi_poll_once(struct efx_nic *efx)342{343 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);344 345 rmb();346 if (!efx->type->mcdi_poll_response(efx))347 return false;348 349 spin_lock_bh(&mcdi->iface_lock);350 efx_mcdi_read_response_header(efx);351 spin_unlock_bh(&mcdi->iface_lock);352 353 return true;354}355 356static int efx_mcdi_poll(struct efx_nic *efx)357{358 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);359 unsigned long time, finish;360 unsigned int spins;361 int rc;362 363 /* Check for a reboot atomically with respect to efx_mcdi_copyout() */364 rc = efx_siena_mcdi_poll_reboot(efx);365 if (rc) {366 spin_lock_bh(&mcdi->iface_lock);367 mcdi->resprc = rc;368 mcdi->resp_hdr_len = 0;369 mcdi->resp_data_len = 0;370 spin_unlock_bh(&mcdi->iface_lock);371 return 0;372 }373 374 /* Poll for completion. Poll quickly (once a us) for the 1st jiffy,375 * because generally mcdi responses are fast. After that, back off376 * and poll once a jiffy (approximately)377 */378 spins = USER_TICK_USEC;379 finish = jiffies + MCDI_RPC_TIMEOUT;380 381 while (1) {382 if (spins != 0) {383 --spins;384 udelay(1);385 } else {386 schedule_timeout_uninterruptible(1);387 }388 389 time = jiffies;390 391 if (efx_mcdi_poll_once(efx))392 break;393 394 if (time_after(time, finish))395 return -ETIMEDOUT;396 }397 398 /* Return rc=0 like wait_event_timeout() */399 return 0;400}401 402/* Test and clear MC-rebooted flag for this port/function; reset403 * software state as necessary.404 */405int efx_siena_mcdi_poll_reboot(struct efx_nic *efx)406{407 if (!efx->mcdi)408 return 0;409 410 return efx->type->mcdi_poll_reboot(efx);411}412 413static bool efx_mcdi_acquire_async(struct efx_mcdi_iface *mcdi)414{415 return cmpxchg(&mcdi->state,416 MCDI_STATE_QUIESCENT, MCDI_STATE_RUNNING_ASYNC) ==417 MCDI_STATE_QUIESCENT;418}419 420static void efx_mcdi_acquire_sync(struct efx_mcdi_iface *mcdi)421{422 /* Wait until the interface becomes QUIESCENT and we win the race423 * to mark it RUNNING_SYNC.424 */425 wait_event(mcdi->wq,426 cmpxchg(&mcdi->state,427 MCDI_STATE_QUIESCENT, MCDI_STATE_RUNNING_SYNC) ==428 MCDI_STATE_QUIESCENT);429}430 431static int efx_mcdi_await_completion(struct efx_nic *efx)432{433 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);434 435 if (wait_event_timeout(mcdi->wq, mcdi->state == MCDI_STATE_COMPLETED,436 MCDI_RPC_TIMEOUT) == 0)437 return -ETIMEDOUT;438 439 /* Check if efx_mcdi_set_mode() switched us back to polled completions.440 * In which case, poll for completions directly. If efx_mcdi_ev_cpl()441 * completed the request first, then we'll just end up completing the442 * request again, which is safe.443 *444 * We need an smp_rmb() to synchronise with efx_siena_mcdi_mode_poll(), which445 * wait_event_timeout() implicitly provides.446 */447 if (mcdi->mode == MCDI_MODE_POLL)448 return efx_mcdi_poll(efx);449 450 return 0;451}452 453/* If the interface is RUNNING_SYNC, switch to COMPLETED and wake the454 * requester. Return whether this was done. Does not take any locks.455 */456static bool efx_mcdi_complete_sync(struct efx_mcdi_iface *mcdi)457{458 if (cmpxchg(&mcdi->state,459 MCDI_STATE_RUNNING_SYNC, MCDI_STATE_COMPLETED) ==460 MCDI_STATE_RUNNING_SYNC) {461 wake_up(&mcdi->wq);462 return true;463 }464 465 return false;466}467 468static void efx_mcdi_release(struct efx_mcdi_iface *mcdi)469{470 if (mcdi->mode == MCDI_MODE_EVENTS) {471 struct efx_mcdi_async_param *async;472 struct efx_nic *efx = mcdi->efx;473 474 /* Process the asynchronous request queue */475 spin_lock_bh(&mcdi->async_lock);476 async = list_first_entry_or_null(477 &mcdi->async_list, struct efx_mcdi_async_param, list);478 if (async) {479 mcdi->state = MCDI_STATE_RUNNING_ASYNC;480 efx_mcdi_send_request(efx, async->cmd,481 (const efx_dword_t *)(async + 1),482 async->inlen);483 mod_timer(&mcdi->async_timer,484 jiffies + MCDI_RPC_TIMEOUT);485 }486 spin_unlock_bh(&mcdi->async_lock);487 488 if (async)489 return;490 }491 492 mcdi->state = MCDI_STATE_QUIESCENT;493 wake_up(&mcdi->wq);494}495 496/* If the interface is RUNNING_ASYNC, switch to COMPLETED, call the497 * asynchronous completion function, and release the interface.498 * Return whether this was done. Must be called in bh-disabled499 * context. Will take iface_lock and async_lock.500 */501static bool efx_mcdi_complete_async(struct efx_mcdi_iface *mcdi, bool timeout)502{503 struct efx_nic *efx = mcdi->efx;504 struct efx_mcdi_async_param *async;505 size_t hdr_len, data_len, err_len;506 efx_dword_t *outbuf;507 MCDI_DECLARE_BUF_ERR(errbuf);508 int rc;509 510 if (cmpxchg(&mcdi->state,511 MCDI_STATE_RUNNING_ASYNC, MCDI_STATE_COMPLETED) !=512 MCDI_STATE_RUNNING_ASYNC)513 return false;514 515 spin_lock(&mcdi->iface_lock);516 if (timeout) {517 /* Ensure that if the completion event arrives later,518 * the seqno check in efx_mcdi_ev_cpl() will fail519 */520 ++mcdi->seqno;521 ++mcdi->credits;522 rc = -ETIMEDOUT;523 hdr_len = 0;524 data_len = 0;525 } else {526 rc = mcdi->resprc;527 hdr_len = mcdi->resp_hdr_len;528 data_len = mcdi->resp_data_len;529 }530 spin_unlock(&mcdi->iface_lock);531 532 /* Stop the timer. In case the timer function is running, we533 * must wait for it to return so that there is no possibility534 * of it aborting the next request.535 */536 if (!timeout)537 del_timer_sync(&mcdi->async_timer);538 539 spin_lock(&mcdi->async_lock);540 async = list_first_entry(&mcdi->async_list,541 struct efx_mcdi_async_param, list);542 list_del(&async->list);543 spin_unlock(&mcdi->async_lock);544 545 outbuf = (efx_dword_t *)(async + 1);546 efx->type->mcdi_read_response(efx, outbuf, hdr_len,547 min(async->outlen, data_len));548 if (!timeout && rc && !async->quiet) {549 err_len = min(sizeof(errbuf), data_len);550 efx->type->mcdi_read_response(efx, errbuf, hdr_len,551 sizeof(errbuf));552 efx_siena_mcdi_display_error(efx, async->cmd, async->inlen,553 errbuf, err_len, rc);554 }555 556 if (async->complete)557 async->complete(efx, async->cookie, rc, outbuf,558 min(async->outlen, data_len));559 kfree(async);560 561 efx_mcdi_release(mcdi);562 563 return true;564}565 566static void efx_mcdi_ev_cpl(struct efx_nic *efx, unsigned int seqno,567 unsigned int datalen, unsigned int mcdi_err)568{569 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);570 bool wake = false;571 572 spin_lock(&mcdi->iface_lock);573 574 if ((seqno ^ mcdi->seqno) & SEQ_MASK) {575 if (mcdi->credits)576 /* The request has been cancelled */577 --mcdi->credits;578 else579 netif_err(efx, hw, efx->net_dev,580 "MC response mismatch tx seq 0x%x rx "581 "seq 0x%x\n", seqno, mcdi->seqno);582 } else {583 if (efx->type->mcdi_max_ver >= 2) {584 /* MCDI v2 responses don't fit in an event */585 efx_mcdi_read_response_header(efx);586 } else {587 mcdi->resprc = efx_mcdi_errno(mcdi_err);588 mcdi->resp_hdr_len = 4;589 mcdi->resp_data_len = datalen;590 }591 592 wake = true;593 }594 595 spin_unlock(&mcdi->iface_lock);596 597 if (wake) {598 if (!efx_mcdi_complete_async(mcdi, false))599 (void) efx_mcdi_complete_sync(mcdi);600 601 /* If the interface isn't RUNNING_ASYNC or602 * RUNNING_SYNC then we've received a duplicate603 * completion after we've already transitioned back to604 * QUIESCENT. [A subsequent invocation would increment605 * seqno, so would have failed the seqno check].606 */607 }608}609 610static void efx_mcdi_timeout_async(struct timer_list *t)611{612 struct efx_mcdi_iface *mcdi = from_timer(mcdi, t, async_timer);613 614 efx_mcdi_complete_async(mcdi, true);615}616 617static int618efx_mcdi_check_supported(struct efx_nic *efx, unsigned int cmd, size_t inlen)619{620 if (efx->type->mcdi_max_ver < 0 ||621 (efx->type->mcdi_max_ver < 2 &&622 cmd > MC_CMD_CMD_SPACE_ESCAPE_7))623 return -EINVAL;624 625 if (inlen > MCDI_CTL_SDU_LEN_MAX_V2 ||626 (efx->type->mcdi_max_ver < 2 &&627 inlen > MCDI_CTL_SDU_LEN_MAX_V1))628 return -EMSGSIZE;629 630 return 0;631}632 633static bool efx_mcdi_get_proxy_handle(struct efx_nic *efx,634 size_t hdr_len, size_t data_len,635 u32 *proxy_handle)636{637 MCDI_DECLARE_BUF_ERR(testbuf);638 const size_t buflen = sizeof(testbuf);639 640 if (!proxy_handle || data_len < buflen)641 return false;642 643 efx->type->mcdi_read_response(efx, testbuf, hdr_len, buflen);644 if (MCDI_DWORD(testbuf, ERR_CODE) == MC_CMD_ERR_PROXY_PENDING) {645 *proxy_handle = MCDI_DWORD(testbuf, ERR_PROXY_PENDING_HANDLE);646 return true;647 }648 649 return false;650}651 652static int _efx_mcdi_rpc_finish(struct efx_nic *efx, unsigned int cmd,653 size_t inlen,654 efx_dword_t *outbuf, size_t outlen,655 size_t *outlen_actual, bool quiet,656 u32 *proxy_handle, int *raw_rc)657{658 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);659 MCDI_DECLARE_BUF_ERR(errbuf);660 int rc;661 662 if (mcdi->mode == MCDI_MODE_POLL)663 rc = efx_mcdi_poll(efx);664 else665 rc = efx_mcdi_await_completion(efx);666 667 if (rc != 0) {668 netif_err(efx, hw, efx->net_dev,669 "MC command 0x%x inlen %d mode %d timed out\n",670 cmd, (int)inlen, mcdi->mode);671 672 if (mcdi->mode == MCDI_MODE_EVENTS && efx_mcdi_poll_once(efx)) {673 netif_err(efx, hw, efx->net_dev,674 "MCDI request was completed without an event\n");675 rc = 0;676 }677 678 efx_mcdi_abandon(efx);679 680 /* Close the race with efx_mcdi_ev_cpl() executing just too late681 * and completing a request we've just cancelled, by ensuring682 * that the seqno check therein fails.683 */684 spin_lock_bh(&mcdi->iface_lock);685 ++mcdi->seqno;686 ++mcdi->credits;687 spin_unlock_bh(&mcdi->iface_lock);688 }689 690 if (proxy_handle)691 *proxy_handle = 0;692 693 if (rc != 0) {694 if (outlen_actual)695 *outlen_actual = 0;696 } else {697 size_t hdr_len, data_len, err_len;698 699 /* At the very least we need a memory barrier here to ensure700 * we pick up changes from efx_mcdi_ev_cpl(). Protect against701 * a spurious efx_mcdi_ev_cpl() running concurrently by702 * acquiring the iface_lock. */703 spin_lock_bh(&mcdi->iface_lock);704 rc = mcdi->resprc;705 if (raw_rc)706 *raw_rc = mcdi->resprc_raw;707 hdr_len = mcdi->resp_hdr_len;708 data_len = mcdi->resp_data_len;709 err_len = min(sizeof(errbuf), data_len);710 spin_unlock_bh(&mcdi->iface_lock);711 712 BUG_ON(rc > 0);713 714 efx->type->mcdi_read_response(efx, outbuf, hdr_len,715 min(outlen, data_len));716 if (outlen_actual)717 *outlen_actual = data_len;718 719 efx->type->mcdi_read_response(efx, errbuf, hdr_len, err_len);720 721 if (cmd == MC_CMD_REBOOT && rc == -EIO) {722 /* Don't reset if MC_CMD_REBOOT returns EIO */723 } else if (rc == -EIO || rc == -EINTR) {724 netif_err(efx, hw, efx->net_dev, "MC reboot detected\n");725 netif_dbg(efx, hw, efx->net_dev, "MC rebooted during command %d rc %d\n",726 cmd, -rc);727 if (efx->type->mcdi_reboot_detected)728 efx->type->mcdi_reboot_detected(efx);729 efx_siena_schedule_reset(efx, RESET_TYPE_MC_FAILURE);730 } else if (proxy_handle && (rc == -EPROTO) &&731 efx_mcdi_get_proxy_handle(efx, hdr_len, data_len,732 proxy_handle)) {733 mcdi->proxy_rx_status = 0;734 mcdi->proxy_rx_handle = 0;735 mcdi->state = MCDI_STATE_PROXY_WAIT;736 } else if (rc && !quiet) {737 efx_siena_mcdi_display_error(efx, cmd, inlen, errbuf,738 err_len, rc);739 }740 741 if (rc == -EIO || rc == -EINTR) {742 msleep(MCDI_STATUS_SLEEP_MS);743 efx_siena_mcdi_poll_reboot(efx);744 mcdi->new_epoch = true;745 }746 }747 748 if (!proxy_handle || !*proxy_handle)749 efx_mcdi_release(mcdi);750 return rc;751}752 753static void efx_mcdi_proxy_abort(struct efx_mcdi_iface *mcdi)754{755 if (mcdi->state == MCDI_STATE_PROXY_WAIT) {756 /* Interrupt the proxy wait. */757 mcdi->proxy_rx_status = -EINTR;758 wake_up(&mcdi->proxy_rx_wq);759 }760}761 762static void efx_mcdi_ev_proxy_response(struct efx_nic *efx,763 u32 handle, int status)764{765 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);766 767 WARN_ON(mcdi->state != MCDI_STATE_PROXY_WAIT);768 769 mcdi->proxy_rx_status = efx_mcdi_errno(status);770 /* Ensure the status is written before we update the handle, since the771 * latter is used to check if we've finished.772 */773 wmb();774 mcdi->proxy_rx_handle = handle;775 wake_up(&mcdi->proxy_rx_wq);776}777 778static int efx_mcdi_proxy_wait(struct efx_nic *efx, u32 handle, bool quiet)779{780 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);781 int rc;782 783 /* Wait for a proxy event, or timeout. */784 rc = wait_event_timeout(mcdi->proxy_rx_wq,785 mcdi->proxy_rx_handle != 0 ||786 mcdi->proxy_rx_status == -EINTR,787 MCDI_RPC_TIMEOUT);788 789 if (rc <= 0) {790 netif_dbg(efx, hw, efx->net_dev,791 "MCDI proxy timeout %d\n", handle);792 return -ETIMEDOUT;793 } else if (mcdi->proxy_rx_handle != handle) {794 netif_warn(efx, hw, efx->net_dev,795 "MCDI proxy unexpected handle %d (expected %d)\n",796 mcdi->proxy_rx_handle, handle);797 return -EINVAL;798 }799 800 return mcdi->proxy_rx_status;801}802 803static int _efx_mcdi_rpc(struct efx_nic *efx, unsigned int cmd,804 const efx_dword_t *inbuf, size_t inlen,805 efx_dword_t *outbuf, size_t outlen,806 size_t *outlen_actual, bool quiet, int *raw_rc)807{808 u32 proxy_handle = 0; /* Zero is an invalid proxy handle. */809 int rc;810 811 if (inbuf && inlen && (inbuf == outbuf)) {812 /* The input buffer can't be aliased with the output. */813 WARN_ON(1);814 return -EINVAL;815 }816 817 rc = efx_siena_mcdi_rpc_start(efx, cmd, inbuf, inlen);818 if (rc)819 return rc;820 821 rc = _efx_mcdi_rpc_finish(efx, cmd, inlen, outbuf, outlen,822 outlen_actual, quiet, &proxy_handle, raw_rc);823 824 if (proxy_handle) {825 /* Handle proxy authorisation. This allows approval of MCDI826 * operations to be delegated to the admin function, allowing827 * fine control over (eg) multicast subscriptions.828 */829 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);830 831 netif_dbg(efx, hw, efx->net_dev,832 "MCDI waiting for proxy auth %d\n",833 proxy_handle);834 rc = efx_mcdi_proxy_wait(efx, proxy_handle, quiet);835 836 if (rc == 0) {837 netif_dbg(efx, hw, efx->net_dev,838 "MCDI proxy retry %d\n", proxy_handle);839 840 /* We now retry the original request. */841 mcdi->state = MCDI_STATE_RUNNING_SYNC;842 efx_mcdi_send_request(efx, cmd, inbuf, inlen);843 844 rc = _efx_mcdi_rpc_finish(efx, cmd, inlen,845 outbuf, outlen, outlen_actual,846 quiet, NULL, raw_rc);847 } else {848 netif_cond_dbg(efx, hw, efx->net_dev, rc == -EPERM, err,849 "MC command 0x%x failed after proxy auth rc=%d\n",850 cmd, rc);851 852 if (rc == -EINTR || rc == -EIO)853 efx_siena_schedule_reset(efx, RESET_TYPE_MC_FAILURE);854 efx_mcdi_release(mcdi);855 }856 }857 858 return rc;859}860 861static int _efx_mcdi_rpc_evb_retry(struct efx_nic *efx, unsigned cmd,862 const efx_dword_t *inbuf, size_t inlen,863 efx_dword_t *outbuf, size_t outlen,864 size_t *outlen_actual, bool quiet)865{866 int raw_rc = 0;867 int rc;868 869 rc = _efx_mcdi_rpc(efx, cmd, inbuf, inlen,870 outbuf, outlen, outlen_actual, true, &raw_rc);871 872 if ((rc == -EPROTO) && (raw_rc == MC_CMD_ERR_NO_EVB_PORT) &&873 efx->type->is_vf) {874 /* If the EVB port isn't available within a VF this may875 * mean the PF is still bringing the switch up. We should876 * retry our request shortly.877 */878 unsigned long abort_time = jiffies + MCDI_RPC_TIMEOUT;879 unsigned int delay_us = 10000;880 881 netif_dbg(efx, hw, efx->net_dev,882 "%s: NO_EVB_PORT; will retry request\n",883 __func__);884 885 do {886 usleep_range(delay_us, delay_us + 10000);887 rc = _efx_mcdi_rpc(efx, cmd, inbuf, inlen,888 outbuf, outlen, outlen_actual,889 true, &raw_rc);890 if (delay_us < 100000)891 delay_us <<= 1;892 } while ((rc == -EPROTO) &&893 (raw_rc == MC_CMD_ERR_NO_EVB_PORT) &&894 time_before(jiffies, abort_time));895 }896 897 if (rc && !quiet && !(cmd == MC_CMD_REBOOT && rc == -EIO))898 efx_siena_mcdi_display_error(efx, cmd, inlen,899 outbuf, outlen, rc);900 901 return rc;902}903 904/**905 * efx_siena_mcdi_rpc - Issue an MCDI command and wait for completion906 * @efx: NIC through which to issue the command907 * @cmd: Command type number908 * @inbuf: Command parameters909 * @inlen: Length of command parameters, in bytes. Must be a multiple910 * of 4 and no greater than %MCDI_CTL_SDU_LEN_MAX_V1.911 * @outbuf: Response buffer. May be %NULL if @outlen is 0.912 * @outlen: Length of response buffer, in bytes. If the actual913 * response is longer than @outlen & ~3, it will be truncated914 * to that length.915 * @outlen_actual: Pointer through which to return the actual response916 * length. May be %NULL if this is not needed.917 *918 * This function may sleep and therefore must be called in an appropriate919 * context.920 *921 * Return: A negative error code, or zero if successful. The error922 * code may come from the MCDI response or may indicate a failure923 * to communicate with the MC. In the former case, the response924 * will still be copied to @outbuf and *@outlen_actual will be925 * set accordingly. In the latter case, *@outlen_actual will be926 * set to zero.927 */928int efx_siena_mcdi_rpc(struct efx_nic *efx, unsigned int cmd,929 const efx_dword_t *inbuf, size_t inlen,930 efx_dword_t *outbuf, size_t outlen,931 size_t *outlen_actual)932{933 return _efx_mcdi_rpc_evb_retry(efx, cmd, inbuf, inlen, outbuf, outlen,934 outlen_actual, false);935}936 937/* Normally, on receiving an error code in the MCDI response,938 * efx_siena_mcdi_rpc will log an error message containing (among other939 * things) the raw error code, by means of efx_siena_mcdi_display_error.940 * This _quiet version suppresses that; if the caller wishes to log941 * the error conditionally on the return code, it should call this942 * function and is then responsible for calling efx_siena_mcdi_display_error943 * as needed.944 */945int efx_siena_mcdi_rpc_quiet(struct efx_nic *efx, unsigned int cmd,946 const efx_dword_t *inbuf, size_t inlen,947 efx_dword_t *outbuf, size_t outlen,948 size_t *outlen_actual)949{950 return _efx_mcdi_rpc_evb_retry(efx, cmd, inbuf, inlen, outbuf, outlen,951 outlen_actual, true);952}953 954int efx_siena_mcdi_rpc_start(struct efx_nic *efx, unsigned int cmd,955 const efx_dword_t *inbuf, size_t inlen)956{957 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);958 int rc;959 960 rc = efx_mcdi_check_supported(efx, cmd, inlen);961 if (rc)962 return rc;963 964 if (efx->mc_bist_for_other_fn)965 return -ENETDOWN;966 967 if (mcdi->mode == MCDI_MODE_FAIL)968 return -ENETDOWN;969 970 efx_mcdi_acquire_sync(mcdi);971 efx_mcdi_send_request(efx, cmd, inbuf, inlen);972 return 0;973}974 975static int _efx_mcdi_rpc_async(struct efx_nic *efx, unsigned int cmd,976 const efx_dword_t *inbuf, size_t inlen,977 size_t outlen,978 efx_mcdi_async_completer *complete,979 unsigned long cookie, bool quiet)980{981 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);982 struct efx_mcdi_async_param *async;983 int rc;984 985 rc = efx_mcdi_check_supported(efx, cmd, inlen);986 if (rc)987 return rc;988 989 if (efx->mc_bist_for_other_fn)990 return -ENETDOWN;991 992 async = kmalloc(sizeof(*async) + ALIGN(max(inlen, outlen), 4),993 GFP_ATOMIC);994 if (!async)995 return -ENOMEM;996 997 async->cmd = cmd;998 async->inlen = inlen;999 async->outlen = outlen;1000 async->quiet = quiet;1001 async->complete = complete;1002 async->cookie = cookie;1003 memcpy(async + 1, inbuf, inlen);1004 1005 spin_lock_bh(&mcdi->async_lock);1006 1007 if (mcdi->mode == MCDI_MODE_EVENTS) {1008 list_add_tail(&async->list, &mcdi->async_list);1009 1010 /* If this is at the front of the queue, try to start it1011 * immediately1012 */1013 if (mcdi->async_list.next == &async->list &&1014 efx_mcdi_acquire_async(mcdi)) {1015 efx_mcdi_send_request(efx, cmd, inbuf, inlen);1016 mod_timer(&mcdi->async_timer,1017 jiffies + MCDI_RPC_TIMEOUT);1018 }1019 } else {1020 kfree(async);1021 rc = -ENETDOWN;1022 }1023 1024 spin_unlock_bh(&mcdi->async_lock);1025 1026 return rc;1027}1028 1029/**1030 * efx_siena_mcdi_rpc_async - Schedule an MCDI command to run asynchronously1031 * @efx: NIC through which to issue the command1032 * @cmd: Command type number1033 * @inbuf: Command parameters1034 * @inlen: Length of command parameters, in bytes1035 * @outlen: Length to allocate for response buffer, in bytes1036 * @complete: Function to be called on completion or cancellation.1037 * @cookie: Arbitrary value to be passed to @complete.1038 *1039 * This function does not sleep and therefore may be called in atomic1040 * context. It will fail if event queues are disabled or if MCDI1041 * event completions have been disabled due to an error.1042 *1043 * If it succeeds, the @complete function will be called exactly once1044 * in atomic context, when one of the following occurs:1045 * (a) the completion event is received (in NAPI context)1046 * (b) event queues are disabled (in the process that disables them)1047 * (c) the request times-out (in timer context)1048 */1049int1050efx_siena_mcdi_rpc_async(struct efx_nic *efx, unsigned int cmd,1051 const efx_dword_t *inbuf, size_t inlen, size_t outlen,1052 efx_mcdi_async_completer *complete,1053 unsigned long cookie)1054{1055 return _efx_mcdi_rpc_async(efx, cmd, inbuf, inlen, outlen, complete,1056 cookie, false);1057}1058 1059int efx_siena_mcdi_rpc_async_quiet(struct efx_nic *efx, unsigned int cmd,1060 const efx_dword_t *inbuf, size_t inlen,1061 size_t outlen,1062 efx_mcdi_async_completer *complete,1063 unsigned long cookie)1064{1065 return _efx_mcdi_rpc_async(efx, cmd, inbuf, inlen, outlen, complete,1066 cookie, true);1067}1068 1069int efx_siena_mcdi_rpc_finish(struct efx_nic *efx, unsigned int cmd,1070 size_t inlen, efx_dword_t *outbuf, size_t outlen,1071 size_t *outlen_actual)1072{1073 return _efx_mcdi_rpc_finish(efx, cmd, inlen, outbuf, outlen,1074 outlen_actual, false, NULL, NULL);1075}1076 1077int efx_siena_mcdi_rpc_finish_quiet(struct efx_nic *efx, unsigned int cmd,1078 size_t inlen, efx_dword_t *outbuf,1079 size_t outlen, size_t *outlen_actual)1080{1081 return _efx_mcdi_rpc_finish(efx, cmd, inlen, outbuf, outlen,1082 outlen_actual, true, NULL, NULL);1083}1084 1085void efx_siena_mcdi_display_error(struct efx_nic *efx, unsigned int cmd,1086 size_t inlen, efx_dword_t *outbuf,1087 size_t outlen, int rc)1088{1089 int code = 0, err_arg = 0;1090 1091 if (outlen >= MC_CMD_ERR_CODE_OFST + 4)1092 code = MCDI_DWORD(outbuf, ERR_CODE);1093 if (outlen >= MC_CMD_ERR_ARG_OFST + 4)1094 err_arg = MCDI_DWORD(outbuf, ERR_ARG);1095 netif_cond_dbg(efx, hw, efx->net_dev, rc == -EPERM, err,1096 "MC command 0x%x inlen %zu failed rc=%d (raw=%d) arg=%d\n",1097 cmd, inlen, rc, code, err_arg);1098}1099 1100/* Switch to polled MCDI completions. This can be called in various1101 * error conditions with various locks held, so it must be lockless.1102 * Caller is responsible for flushing asynchronous requests later.1103 */1104void efx_siena_mcdi_mode_poll(struct efx_nic *efx)1105{1106 struct efx_mcdi_iface *mcdi;1107 1108 if (!efx->mcdi)1109 return;1110 1111 mcdi = efx_mcdi(efx);1112 /* If already in polling mode, nothing to do.1113 * If in fail-fast state, don't switch to polled completion.1114 * FLR recovery will do that later.1115 */1116 if (mcdi->mode == MCDI_MODE_POLL || mcdi->mode == MCDI_MODE_FAIL)1117 return;1118 1119 /* We can switch from event completion to polled completion, because1120 * mcdi requests are always completed in shared memory. We do this by1121 * switching the mode to POLL'd then completing the request.1122 * efx_mcdi_await_completion() will then call efx_mcdi_poll().1123 *1124 * We need an smp_wmb() to synchronise with efx_mcdi_await_completion(),1125 * which efx_mcdi_complete_sync() provides for us.1126 */1127 mcdi->mode = MCDI_MODE_POLL;1128 1129 efx_mcdi_complete_sync(mcdi);1130}1131 1132/* Flush any running or queued asynchronous requests, after event processing1133 * is stopped1134 */1135void efx_siena_mcdi_flush_async(struct efx_nic *efx)1136{1137 struct efx_mcdi_async_param *async, *next;1138 struct efx_mcdi_iface *mcdi;1139 1140 if (!efx->mcdi)1141 return;1142 1143 mcdi = efx_mcdi(efx);1144 1145 /* We must be in poll or fail mode so no more requests can be queued */1146 BUG_ON(mcdi->mode == MCDI_MODE_EVENTS);1147 1148 del_timer_sync(&mcdi->async_timer);1149 1150 /* If a request is still running, make sure we give the MC1151 * time to complete it so that the response won't overwrite our1152 * next request.1153 */1154 if (mcdi->state == MCDI_STATE_RUNNING_ASYNC) {1155 efx_mcdi_poll(efx);1156 mcdi->state = MCDI_STATE_QUIESCENT;1157 }1158 1159 /* Nothing else will access the async list now, so it is safe1160 * to walk it without holding async_lock. If we hold it while1161 * calling a completer then lockdep may warn that we have1162 * acquired locks in the wrong order.1163 */1164 list_for_each_entry_safe(async, next, &mcdi->async_list, list) {1165 if (async->complete)1166 async->complete(efx, async->cookie, -ENETDOWN, NULL, 0);1167 list_del(&async->list);1168 kfree(async);1169 }1170}1171 1172void efx_siena_mcdi_mode_event(struct efx_nic *efx)1173{1174 struct efx_mcdi_iface *mcdi;1175 1176 if (!efx->mcdi)1177 return;1178 1179 mcdi = efx_mcdi(efx);1180 /* If already in event completion mode, nothing to do.1181 * If in fail-fast state, don't switch to event completion. FLR1182 * recovery will do that later.1183 */1184 if (mcdi->mode == MCDI_MODE_EVENTS || mcdi->mode == MCDI_MODE_FAIL)1185 return;1186 1187 /* We can't switch from polled to event completion in the middle of a1188 * request, because the completion method is specified in the request.1189 * So acquire the interface to serialise the requestors. We don't need1190 * to acquire the iface_lock to change the mode here, but we do need a1191 * write memory barrier ensure that efx_siena_mcdi_rpc() sees it, which1192 * efx_mcdi_acquire() provides.1193 */1194 efx_mcdi_acquire_sync(mcdi);1195 mcdi->mode = MCDI_MODE_EVENTS;1196 efx_mcdi_release(mcdi);1197}1198 1199static void efx_mcdi_ev_death(struct efx_nic *efx, int rc)1200{1201 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);1202 1203 /* If there is an outstanding MCDI request, it has been terminated1204 * either by a BADASSERT or REBOOT event. If the mcdi interface is1205 * in polled mode, then do nothing because the MC reboot handler will1206 * set the header correctly. However, if the mcdi interface is waiting1207 * for a CMDDONE event it won't receive it [and since all MCDI events1208 * are sent to the same queue, we can't be racing with1209 * efx_mcdi_ev_cpl()]1210 *1211 * If there is an outstanding asynchronous request, we can't1212 * complete it now (efx_mcdi_complete() would deadlock). The1213 * reset process will take care of this.1214 *1215 * There's a race here with efx_mcdi_send_request(), because1216 * we might receive a REBOOT event *before* the request has1217 * been copied out. In polled mode (during startup) this is1218 * irrelevant, because efx_mcdi_complete_sync() is ignored. In1219 * event mode, this condition is just an edge-case of1220 * receiving a REBOOT event after posting the MCDI1221 * request. Did the mc reboot before or after the copyout? The1222 * best we can do always is just return failure.1223 *1224 * If there is an outstanding proxy response expected it is not going1225 * to arrive. We should thus abort it.1226 */1227 spin_lock(&mcdi->iface_lock);1228 efx_mcdi_proxy_abort(mcdi);1229 1230 if (efx_mcdi_complete_sync(mcdi)) {1231 if (mcdi->mode == MCDI_MODE_EVENTS) {1232 mcdi->resprc = rc;1233 mcdi->resp_hdr_len = 0;1234 mcdi->resp_data_len = 0;1235 ++mcdi->credits;1236 }1237 } else {1238 int count;1239 1240 /* Consume the status word since efx_siena_mcdi_rpc_finish() won't */1241 for (count = 0; count < MCDI_STATUS_DELAY_COUNT; ++count) {1242 rc = efx_siena_mcdi_poll_reboot(efx);1243 if (rc)1244 break;1245 udelay(MCDI_STATUS_DELAY_US);1246 }1247 1248 /* On EF10, a CODE_MC_REBOOT event can be received without the1249 * reboot detection in efx_siena_mcdi_poll_reboot() being triggered.1250 * If zero was returned from the final call to1251 * efx_siena_mcdi_poll_reboot(), the MC reboot wasn't noticed but the1252 * MC has definitely rebooted so prepare for the reset.1253 */1254 if (!rc && efx->type->mcdi_reboot_detected)1255 efx->type->mcdi_reboot_detected(efx);1256 1257 mcdi->new_epoch = true;1258 1259 /* Nobody was waiting for an MCDI request, so trigger a reset */1260 efx_siena_schedule_reset(efx, RESET_TYPE_MC_FAILURE);1261 }1262 1263 spin_unlock(&mcdi->iface_lock);1264}1265 1266/* The MC is going down in to BIST mode. set the BIST flag to block1267 * new MCDI, cancel any outstanding MCDI and schedule a BIST-type reset1268 * (which doesn't actually execute a reset, it waits for the controlling1269 * function to reset it).1270 */1271static void efx_mcdi_ev_bist(struct efx_nic *efx)1272{1273 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);1274 1275 spin_lock(&mcdi->iface_lock);1276 efx->mc_bist_for_other_fn = true;1277 efx_mcdi_proxy_abort(mcdi);1278 1279 if (efx_mcdi_complete_sync(mcdi)) {1280 if (mcdi->mode == MCDI_MODE_EVENTS) {1281 mcdi->resprc = -EIO;1282 mcdi->resp_hdr_len = 0;1283 mcdi->resp_data_len = 0;1284 ++mcdi->credits;1285 }1286 }1287 mcdi->new_epoch = true;1288 efx_siena_schedule_reset(efx, RESET_TYPE_MC_BIST);1289 spin_unlock(&mcdi->iface_lock);1290}1291 1292/* MCDI timeouts seen, so make all MCDI calls fail-fast and issue an FLR to try1293 * to recover.1294 */1295static void efx_mcdi_abandon(struct efx_nic *efx)1296{1297 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);1298 1299 if (xchg(&mcdi->mode, MCDI_MODE_FAIL) == MCDI_MODE_FAIL)1300 return; /* it had already been done */1301 netif_dbg(efx, hw, efx->net_dev, "MCDI is timing out; trying to recover\n");1302 efx_siena_schedule_reset(efx, RESET_TYPE_MCDI_TIMEOUT);1303}1304 1305static void efx_handle_drain_event(struct efx_nic *efx)1306{1307 if (atomic_dec_and_test(&efx->active_queues))1308 wake_up(&efx->flush_wq);1309 1310 WARN_ON(atomic_read(&efx->active_queues) < 0);1311}1312 1313/* Called from efx_farch_ev_process and efx_ef10_ev_process for MCDI events */1314void efx_siena_mcdi_process_event(struct efx_channel *channel,1315 efx_qword_t *event)1316{1317 struct efx_nic *efx = channel->efx;1318 int code = EFX_QWORD_FIELD(*event, MCDI_EVENT_CODE);1319 u32 data = EFX_QWORD_FIELD(*event, MCDI_EVENT_DATA);1320 1321 switch (code) {1322 case MCDI_EVENT_CODE_BADSSERT:1323 netif_err(efx, hw, efx->net_dev,1324 "MC watchdog or assertion failure at 0x%x\n", data);1325 efx_mcdi_ev_death(efx, -EINTR);1326 break;1327 1328 case MCDI_EVENT_CODE_PMNOTICE:1329 netif_info(efx, wol, efx->net_dev, "MCDI PM event.\n");1330 break;1331 1332 case MCDI_EVENT_CODE_CMDDONE:1333 efx_mcdi_ev_cpl(efx,1334 MCDI_EVENT_FIELD(*event, CMDDONE_SEQ),1335 MCDI_EVENT_FIELD(*event, CMDDONE_DATALEN),1336 MCDI_EVENT_FIELD(*event, CMDDONE_ERRNO));1337 break;1338 1339 case MCDI_EVENT_CODE_LINKCHANGE:1340 efx_siena_mcdi_process_link_change(efx, event);1341 break;1342 case MCDI_EVENT_CODE_SENSOREVT:1343 efx_sensor_event(efx, event);1344 break;1345 case MCDI_EVENT_CODE_SCHEDERR:1346 netif_dbg(efx, hw, efx->net_dev,1347 "MC Scheduler alert (0x%x)\n", data);1348 break;1349 case MCDI_EVENT_CODE_REBOOT:1350 case MCDI_EVENT_CODE_MC_REBOOT:1351 netif_info(efx, hw, efx->net_dev, "MC Reboot\n");1352 efx_mcdi_ev_death(efx, -EIO);1353 break;1354 case MCDI_EVENT_CODE_MC_BIST:1355 netif_info(efx, hw, efx->net_dev, "MC entered BIST mode\n");1356 efx_mcdi_ev_bist(efx);1357 break;1358 case MCDI_EVENT_CODE_MAC_STATS_DMA:1359 /* MAC stats are gather lazily. We can ignore this. */1360 break;1361 case MCDI_EVENT_CODE_FLR:1362 if (efx->type->sriov_flr)1363 efx->type->sriov_flr(efx,1364 MCDI_EVENT_FIELD(*event, FLR_VF));1365 break;1366 case MCDI_EVENT_CODE_PTP_RX:1367 case MCDI_EVENT_CODE_PTP_FAULT:1368 case MCDI_EVENT_CODE_PTP_PPS:1369 efx_siena_ptp_event(efx, event);1370 break;1371 case MCDI_EVENT_CODE_PTP_TIME:1372 efx_siena_time_sync_event(channel, event);1373 break;1374 case MCDI_EVENT_CODE_TX_FLUSH:1375 case MCDI_EVENT_CODE_RX_FLUSH:1376 /* Two flush events will be sent: one to the same event1377 * queue as completions, and one to event queue 0.1378 * In the latter case the {RX,TX}_FLUSH_TO_DRIVER1379 * flag will be set, and we should ignore the event1380 * because we want to wait for all completions.1381 */1382 BUILD_BUG_ON(MCDI_EVENT_TX_FLUSH_TO_DRIVER_LBN !=1383 MCDI_EVENT_RX_FLUSH_TO_DRIVER_LBN);1384 if (!MCDI_EVENT_FIELD(*event, TX_FLUSH_TO_DRIVER))1385 efx_handle_drain_event(efx);1386 break;1387 case MCDI_EVENT_CODE_TX_ERR:1388 case MCDI_EVENT_CODE_RX_ERR:1389 netif_err(efx, hw, efx->net_dev,1390 "%s DMA error (event: "EFX_QWORD_FMT")\n",1391 code == MCDI_EVENT_CODE_TX_ERR ? "TX" : "RX",1392 EFX_QWORD_VAL(*event));1393 efx_siena_schedule_reset(efx, RESET_TYPE_DMA_ERROR);1394 break;1395 case MCDI_EVENT_CODE_PROXY_RESPONSE:1396 efx_mcdi_ev_proxy_response(efx,1397 MCDI_EVENT_FIELD(*event, PROXY_RESPONSE_HANDLE),1398 MCDI_EVENT_FIELD(*event, PROXY_RESPONSE_RC));1399 break;1400 default:1401 netif_err(efx, hw, efx->net_dev,1402 "Unknown MCDI event " EFX_QWORD_FMT "\n",1403 EFX_QWORD_VAL(*event));1404 }1405}1406 1407/**************************************************************************1408 *1409 * Specific request functions1410 *1411 **************************************************************************1412 */1413 1414void efx_siena_mcdi_print_fwver(struct efx_nic *efx, char *buf, size_t len)1415{1416 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_VERSION_OUT_LEN);1417 size_t outlength;1418 const __le16 *ver_words;1419 size_t offset;1420 int rc;1421 1422 BUILD_BUG_ON(MC_CMD_GET_VERSION_IN_LEN != 0);1423 rc = efx_siena_mcdi_rpc(efx, MC_CMD_GET_VERSION, NULL, 0,1424 outbuf, sizeof(outbuf), &outlength);1425 if (rc)1426 goto fail;1427 if (outlength < MC_CMD_GET_VERSION_OUT_LEN) {1428 rc = -EIO;1429 goto fail;1430 }1431 1432 ver_words = (__le16 *)MCDI_PTR(outbuf, GET_VERSION_OUT_VERSION);1433 offset = scnprintf(buf, len, "%u.%u.%u.%u",1434 le16_to_cpu(ver_words[0]),1435 le16_to_cpu(ver_words[1]),1436 le16_to_cpu(ver_words[2]),1437 le16_to_cpu(ver_words[3]));1438 1439 if (efx->type->print_additional_fwver)1440 offset += efx->type->print_additional_fwver(efx, buf + offset,1441 len - offset);1442 1443 /* It's theoretically possible for the string to exceed 311444 * characters, though in practice the first three version1445 * components are short enough that this doesn't happen.1446 */1447 if (WARN_ON(offset >= len))1448 buf[0] = 0;1449 1450 return;1451 1452fail:1453 netif_err(efx, probe, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);1454 buf[0] = 0;1455}1456 1457static int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating,1458 bool *was_attached)1459{1460 MCDI_DECLARE_BUF(inbuf, MC_CMD_DRV_ATTACH_IN_LEN);1461 MCDI_DECLARE_BUF(outbuf, MC_CMD_DRV_ATTACH_EXT_OUT_LEN);1462 size_t outlen;1463 int rc;1464 1465 MCDI_SET_DWORD(inbuf, DRV_ATTACH_IN_NEW_STATE,1466 driver_operating ? 1 : 0);1467 MCDI_SET_DWORD(inbuf, DRV_ATTACH_IN_UPDATE, 1);1468 MCDI_SET_DWORD(inbuf, DRV_ATTACH_IN_FIRMWARE_ID, MC_CMD_FW_LOW_LATENCY);1469 1470 rc = efx_siena_mcdi_rpc_quiet(efx, MC_CMD_DRV_ATTACH, inbuf,1471 sizeof(inbuf), outbuf, sizeof(outbuf),1472 &outlen);1473 /* If we're not the primary PF, trying to ATTACH with a FIRMWARE_ID1474 * specified will fail with EPERM, and we have to tell the MC we don't1475 * care what firmware we get.1476 */1477 if (rc == -EPERM) {1478 netif_dbg(efx, probe, efx->net_dev,1479 "efx_mcdi_drv_attach with fw-variant setting failed EPERM, trying without it\n");1480 MCDI_SET_DWORD(inbuf, DRV_ATTACH_IN_FIRMWARE_ID,1481 MC_CMD_FW_DONT_CARE);1482 rc = efx_siena_mcdi_rpc_quiet(efx, MC_CMD_DRV_ATTACH, inbuf,1483 sizeof(inbuf), outbuf,1484 sizeof(outbuf), &outlen);1485 }1486 if (rc) {1487 efx_siena_mcdi_display_error(efx, MC_CMD_DRV_ATTACH,1488 sizeof(inbuf), outbuf, outlen, rc);1489 goto fail;1490 }1491 if (outlen < MC_CMD_DRV_ATTACH_OUT_LEN) {1492 rc = -EIO;1493 goto fail;1494 }1495 1496 if (driver_operating) {1497 if (outlen >= MC_CMD_DRV_ATTACH_EXT_OUT_LEN) {1498 efx->mcdi->fn_flags =1499 MCDI_DWORD(outbuf,1500 DRV_ATTACH_EXT_OUT_FUNC_FLAGS);1501 } else {1502 /* Synthesise flags for Siena */1503 efx->mcdi->fn_flags =1504 1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_LINKCTRL |1505 1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_TRUSTED |1506 (efx_port_num(efx) == 0) <<1507 MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_PRIMARY;1508 }1509 }1510 1511 /* We currently assume we have control of the external link1512 * and are completely trusted by firmware. Abort probing1513 * if that's not true for this function.1514 */1515 1516 if (was_attached != NULL)1517 *was_attached = MCDI_DWORD(outbuf, DRV_ATTACH_OUT_OLD_STATE);1518 return 0;1519 1520fail:1521 netif_err(efx, probe, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);1522 return rc;1523}1524 1525int efx_siena_mcdi_get_board_cfg(struct efx_nic *efx, u8 *mac_address,1526 u16 *fw_subtype_list, u32 *capabilities)1527{1528 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_BOARD_CFG_OUT_LENMAX);1529 size_t outlen, i;1530 int port_num = efx_port_num(efx);1531 int rc;1532 1533 BUILD_BUG_ON(MC_CMD_GET_BOARD_CFG_IN_LEN != 0);1534 /* we need __aligned(2) for ether_addr_copy */1535 BUILD_BUG_ON(MC_CMD_GET_BOARD_CFG_OUT_MAC_ADDR_BASE_PORT0_OFST & 1);1536 BUILD_BUG_ON(MC_CMD_GET_BOARD_CFG_OUT_MAC_ADDR_BASE_PORT1_OFST & 1);1537 1538 rc = efx_siena_mcdi_rpc(efx, MC_CMD_GET_BOARD_CFG, NULL, 0,1539 outbuf, sizeof(outbuf), &outlen);1540 if (rc)1541 goto fail;1542 1543 if (outlen < MC_CMD_GET_BOARD_CFG_OUT_LENMIN) {1544 rc = -EIO;1545 goto fail;1546 }1547 1548 if (mac_address)1549 ether_addr_copy(mac_address,1550 port_num ?1551 MCDI_PTR(outbuf, GET_BOARD_CFG_OUT_MAC_ADDR_BASE_PORT1) :1552 MCDI_PTR(outbuf, GET_BOARD_CFG_OUT_MAC_ADDR_BASE_PORT0));1553 if (fw_subtype_list) {1554 for (i = 0;1555 i < MCDI_VAR_ARRAY_LEN(outlen,1556 GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST);1557 i++)1558 fw_subtype_list[i] = MCDI_ARRAY_WORD(1559 outbuf, GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST, i);1560 for (; i < MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_MAXNUM; i++)1561 fw_subtype_list[i] = 0;1562 }1563 if (capabilities) {1564 if (port_num)1565 *capabilities = MCDI_DWORD(outbuf,1566 GET_BOARD_CFG_OUT_CAPABILITIES_PORT1);1567 else1568 *capabilities = MCDI_DWORD(outbuf,1569 GET_BOARD_CFG_OUT_CAPABILITIES_PORT0);1570 }1571 1572 return 0;1573 1574fail:1575 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d len=%d\n",1576 __func__, rc, (int)outlen);1577 1578 return rc;1579}1580 1581int efx_siena_mcdi_log_ctrl(struct efx_nic *efx, bool evq, bool uart,1582 u32 dest_evq)1583{1584 MCDI_DECLARE_BUF(inbuf, MC_CMD_LOG_CTRL_IN_LEN);1585 u32 dest = 0;1586 int rc;1587 1588 if (uart)1589 dest |= MC_CMD_LOG_CTRL_IN_LOG_DEST_UART;1590 if (evq)1591 dest |= MC_CMD_LOG_CTRL_IN_LOG_DEST_EVQ;1592 1593 MCDI_SET_DWORD(inbuf, LOG_CTRL_IN_LOG_DEST, dest);1594 MCDI_SET_DWORD(inbuf, LOG_CTRL_IN_LOG_DEST_EVQ, dest_evq);1595 1596 BUILD_BUG_ON(MC_CMD_LOG_CTRL_OUT_LEN != 0);1597 1598 rc = efx_siena_mcdi_rpc(efx, MC_CMD_LOG_CTRL, inbuf, sizeof(inbuf),1599 NULL, 0, NULL);1600 return rc;1601}1602 1603int efx_siena_mcdi_nvram_types(struct efx_nic *efx, u32 *nvram_types_out)1604{1605 MCDI_DECLARE_BUF(outbuf, MC_CMD_NVRAM_TYPES_OUT_LEN);1606 size_t outlen;1607 int rc;1608 1609 BUILD_BUG_ON(MC_CMD_NVRAM_TYPES_IN_LEN != 0);1610 1611 rc = efx_siena_mcdi_rpc(efx, MC_CMD_NVRAM_TYPES, NULL, 0,1612 outbuf, sizeof(outbuf), &outlen);1613 if (rc)1614 goto fail;1615 if (outlen < MC_CMD_NVRAM_TYPES_OUT_LEN) {1616 rc = -EIO;1617 goto fail;1618 }1619 1620 *nvram_types_out = MCDI_DWORD(outbuf, NVRAM_TYPES_OUT_TYPES);1621 return 0;1622 1623fail:1624 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n",1625 __func__, rc);1626 return rc;1627}1628 1629int efx_siena_mcdi_nvram_info(struct efx_nic *efx, unsigned int type,1630 size_t *size_out, size_t *erase_size_out,1631 bool *protected_out)1632{1633 MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_INFO_IN_LEN);1634 MCDI_DECLARE_BUF(outbuf, MC_CMD_NVRAM_INFO_OUT_LEN);1635 size_t outlen;1636 int rc;1637 1638 MCDI_SET_DWORD(inbuf, NVRAM_INFO_IN_TYPE, type);1639 1640 rc = efx_siena_mcdi_rpc(efx, MC_CMD_NVRAM_INFO, inbuf, sizeof(inbuf),1641 outbuf, sizeof(outbuf), &outlen);1642 if (rc)1643 goto fail;1644 if (outlen < MC_CMD_NVRAM_INFO_OUT_LEN) {1645 rc = -EIO;1646 goto fail;1647 }1648 1649 *size_out = MCDI_DWORD(outbuf, NVRAM_INFO_OUT_SIZE);1650 *erase_size_out = MCDI_DWORD(outbuf, NVRAM_INFO_OUT_ERASESIZE);1651 *protected_out = !!(MCDI_DWORD(outbuf, NVRAM_INFO_OUT_FLAGS) &1652 (1 << MC_CMD_NVRAM_INFO_OUT_PROTECTED_LBN));1653 return 0;1654 1655fail:1656 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);1657 return rc;1658}1659 1660static int efx_mcdi_nvram_test(struct efx_nic *efx, unsigned int type)1661{1662 MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_TEST_IN_LEN);1663 MCDI_DECLARE_BUF(outbuf, MC_CMD_NVRAM_TEST_OUT_LEN);1664 int rc;1665 1666 MCDI_SET_DWORD(inbuf, NVRAM_TEST_IN_TYPE, type);1667 1668 rc = efx_siena_mcdi_rpc(efx, MC_CMD_NVRAM_TEST, inbuf, sizeof(inbuf),1669 outbuf, sizeof(outbuf), NULL);1670 if (rc)1671 return rc;1672 1673 switch (MCDI_DWORD(outbuf, NVRAM_TEST_OUT_RESULT)) {1674 case MC_CMD_NVRAM_TEST_PASS:1675 case MC_CMD_NVRAM_TEST_NOTSUPP:1676 return 0;1677 default:1678 return -EIO;1679 }1680}1681 1682int efx_siena_mcdi_nvram_test_all(struct efx_nic *efx)1683{1684 u32 nvram_types;1685 unsigned int type;1686 int rc;1687 1688 rc = efx_siena_mcdi_nvram_types(efx, &nvram_types);1689 if (rc)1690 goto fail1;1691 1692 type = 0;1693 while (nvram_types != 0) {1694 if (nvram_types & 1) {1695 rc = efx_mcdi_nvram_test(efx, type);1696 if (rc)1697 goto fail2;1698 }1699 type++;1700 nvram_types >>= 1;1701 }1702 1703 return 0;1704 1705fail2:1706 netif_err(efx, hw, efx->net_dev, "%s: failed type=%u\n",1707 __func__, type);1708fail1:1709 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);1710 return rc;1711}1712 1713/* Returns 1 if an assertion was read, 0 if no assertion had fired,1714 * negative on error.1715 */1716static int efx_mcdi_read_assertion(struct efx_nic *efx)1717{1718 MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_ASSERTS_IN_LEN);1719 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_ASSERTS_OUT_LEN);1720 unsigned int flags, index;1721 const char *reason;1722 size_t outlen;1723 int retry;1724 int rc;1725 1726 /* Attempt to read any stored assertion state before we reboot1727 * the mcfw out of the assertion handler. Retry twice, once1728 * because a boot-time assertion might cause this command to fail1729 * with EINTR. And once again because GET_ASSERTS can race with1730 * MC_CMD_REBOOT running on the other port. */1731 retry = 2;1732 do {1733 MCDI_SET_DWORD(inbuf, GET_ASSERTS_IN_CLEAR, 1);1734 rc = efx_siena_mcdi_rpc_quiet(efx, MC_CMD_GET_ASSERTS,1735 inbuf, MC_CMD_GET_ASSERTS_IN_LEN,1736 outbuf, sizeof(outbuf), &outlen);1737 if (rc == -EPERM)1738 return 0;1739 } while ((rc == -EINTR || rc == -EIO) && retry-- > 0);1740 1741 if (rc) {1742 efx_siena_mcdi_display_error(efx, MC_CMD_GET_ASSERTS,1743 MC_CMD_GET_ASSERTS_IN_LEN, outbuf,1744 outlen, rc);1745 return rc;1746 }1747 if (outlen < MC_CMD_GET_ASSERTS_OUT_LEN)1748 return -EIO;1749 1750 /* Print out any recorded assertion state */1751 flags = MCDI_DWORD(outbuf, GET_ASSERTS_OUT_GLOBAL_FLAGS);1752 if (flags == MC_CMD_GET_ASSERTS_FLAGS_NO_FAILS)1753 return 0;1754 1755 reason = (flags == MC_CMD_GET_ASSERTS_FLAGS_SYS_FAIL)1756 ? "system-level assertion"1757 : (flags == MC_CMD_GET_ASSERTS_FLAGS_THR_FAIL)1758 ? "thread-level assertion"1759 : (flags == MC_CMD_GET_ASSERTS_FLAGS_WDOG_FIRED)1760 ? "watchdog reset"1761 : "unknown assertion";1762 netif_err(efx, hw, efx->net_dev,1763 "MCPU %s at PC = 0x%.8x in thread 0x%.8x\n", reason,1764 MCDI_DWORD(outbuf, GET_ASSERTS_OUT_SAVED_PC_OFFS),1765 MCDI_DWORD(outbuf, GET_ASSERTS_OUT_THREAD_OFFS));1766 1767 /* Print out the registers */1768 for (index = 0;1769 index < MC_CMD_GET_ASSERTS_OUT_GP_REGS_OFFS_NUM;1770 index++)1771 netif_err(efx, hw, efx->net_dev, "R%.2d (?): 0x%.8x\n",1772 1 + index,1773 MCDI_ARRAY_DWORD(outbuf, GET_ASSERTS_OUT_GP_REGS_OFFS,1774 index));1775 1776 return 1;1777}1778 1779static int efx_mcdi_exit_assertion(struct efx_nic *efx)1780{1781 MCDI_DECLARE_BUF(inbuf, MC_CMD_REBOOT_IN_LEN);1782 int rc;1783 1784 /* If the MC is running debug firmware, it might now be1785 * waiting for a debugger to attach, but we just want it to1786 * reboot. We set a flag that makes the command a no-op if it1787 * has already done so.1788 * The MCDI will thus return either 0 or -EIO.1789 */1790 BUILD_BUG_ON(MC_CMD_REBOOT_OUT_LEN != 0);1791 MCDI_SET_DWORD(inbuf, REBOOT_IN_FLAGS,1792 MC_CMD_REBOOT_FLAGS_AFTER_ASSERTION);1793 rc = efx_siena_mcdi_rpc_quiet(efx, MC_CMD_REBOOT, inbuf,1794 MC_CMD_REBOOT_IN_LEN, NULL, 0, NULL);1795 if (rc == -EIO)1796 rc = 0;1797 if (rc)1798 efx_siena_mcdi_display_error(efx, MC_CMD_REBOOT,1799 MC_CMD_REBOOT_IN_LEN, NULL, 0, rc);1800 return rc;1801}1802 1803int efx_siena_mcdi_handle_assertion(struct efx_nic *efx)1804{1805 int rc;1806 1807 rc = efx_mcdi_read_assertion(efx);1808 if (rc <= 0)1809 return rc;1810 1811 return efx_mcdi_exit_assertion(efx);1812}1813 1814int efx_siena_mcdi_set_id_led(struct efx_nic *efx, enum efx_led_mode mode)1815{1816 MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_ID_LED_IN_LEN);1817 1818 BUILD_BUG_ON(EFX_LED_OFF != MC_CMD_LED_OFF);1819 BUILD_BUG_ON(EFX_LED_ON != MC_CMD_LED_ON);1820 BUILD_BUG_ON(EFX_LED_DEFAULT != MC_CMD_LED_DEFAULT);1821 1822 BUILD_BUG_ON(MC_CMD_SET_ID_LED_OUT_LEN != 0);1823 1824 MCDI_SET_DWORD(inbuf, SET_ID_LED_IN_STATE, mode);1825 1826 return efx_siena_mcdi_rpc(efx, MC_CMD_SET_ID_LED, inbuf, sizeof(inbuf),1827 NULL, 0, NULL);1828}1829 1830static int efx_mcdi_reset_func(struct efx_nic *efx)1831{1832 MCDI_DECLARE_BUF(inbuf, MC_CMD_ENTITY_RESET_IN_LEN);1833 int rc;1834 1835 BUILD_BUG_ON(MC_CMD_ENTITY_RESET_OUT_LEN != 0);1836 MCDI_POPULATE_DWORD_1(inbuf, ENTITY_RESET_IN_FLAG,1837 ENTITY_RESET_IN_FUNCTION_RESOURCE_RESET, 1);1838 rc = efx_siena_mcdi_rpc(efx, MC_CMD_ENTITY_RESET, inbuf, sizeof(inbuf),1839 NULL, 0, NULL);1840 return rc;1841}1842 1843static int efx_mcdi_reset_mc(struct efx_nic *efx)1844{1845 MCDI_DECLARE_BUF(inbuf, MC_CMD_REBOOT_IN_LEN);1846 int rc;1847 1848 BUILD_BUG_ON(MC_CMD_REBOOT_OUT_LEN != 0);1849 MCDI_SET_DWORD(inbuf, REBOOT_IN_FLAGS, 0);1850 rc = efx_siena_mcdi_rpc(efx, MC_CMD_REBOOT, inbuf, sizeof(inbuf),1851 NULL, 0, NULL);1852 /* White is black, and up is down */1853 if (rc == -EIO)1854 return 0;1855 if (rc == 0)1856 rc = -EIO;1857 return rc;1858}1859 1860enum reset_type efx_siena_mcdi_map_reset_reason(enum reset_type reason)1861{1862 return RESET_TYPE_RECOVER_OR_ALL;1863}1864 1865int efx_siena_mcdi_reset(struct efx_nic *efx, enum reset_type method)1866{1867 int rc;1868 1869 /* If MCDI is down, we can't handle_assertion */1870 if (method == RESET_TYPE_MCDI_TIMEOUT) {1871 rc = pci_reset_function(efx->pci_dev);1872 if (rc)1873 return rc;1874 /* Re-enable polled MCDI completion */1875 if (efx->mcdi) {1876 struct efx_mcdi_iface *mcdi = efx_mcdi(efx);1877 mcdi->mode = MCDI_MODE_POLL;1878 }1879 return 0;1880 }1881 1882 /* Recover from a failed assertion pre-reset */1883 rc = efx_siena_mcdi_handle_assertion(efx);1884 if (rc)1885 return rc;1886 1887 if (method == RESET_TYPE_DATAPATH)1888 return 0;1889 else if (method == RESET_TYPE_WORLD)1890 return efx_mcdi_reset_mc(efx);1891 else1892 return efx_mcdi_reset_func(efx);1893}1894 1895static int efx_mcdi_wol_filter_set(struct efx_nic *efx, u32 type,1896 const u8 *mac, int *id_out)1897{1898 MCDI_DECLARE_BUF(inbuf, MC_CMD_WOL_FILTER_SET_IN_LEN);1899 MCDI_DECLARE_BUF(outbuf, MC_CMD_WOL_FILTER_SET_OUT_LEN);1900 size_t outlen;1901 int rc;1902 1903 MCDI_SET_DWORD(inbuf, WOL_FILTER_SET_IN_WOL_TYPE, type);1904 MCDI_SET_DWORD(inbuf, WOL_FILTER_SET_IN_FILTER_MODE,1905 MC_CMD_FILTER_MODE_SIMPLE);1906 ether_addr_copy(MCDI_PTR(inbuf, WOL_FILTER_SET_IN_MAGIC_MAC), mac);1907 1908 rc = efx_siena_mcdi_rpc(efx, MC_CMD_WOL_FILTER_SET, inbuf,1909 sizeof(inbuf), outbuf, sizeof(outbuf), &outlen);1910 if (rc)1911 goto fail;1912 1913 if (outlen < MC_CMD_WOL_FILTER_SET_OUT_LEN) {1914 rc = -EIO;1915 goto fail;1916 }1917 1918 *id_out = (int)MCDI_DWORD(outbuf, WOL_FILTER_SET_OUT_FILTER_ID);1919 1920 return 0;1921 1922fail:1923 *id_out = -1;1924 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);1925 return rc;1926 1927}1928 1929 1930int efx_siena_mcdi_wol_filter_set_magic(struct efx_nic *efx, const u8 *mac,1931 int *id_out)1932{1933 return efx_mcdi_wol_filter_set(efx, MC_CMD_WOL_TYPE_MAGIC, mac, id_out);1934}1935 1936 1937int efx_siena_mcdi_wol_filter_get_magic(struct efx_nic *efx, int *id_out)1938{1939 MCDI_DECLARE_BUF(outbuf, MC_CMD_WOL_FILTER_GET_OUT_LEN);1940 size_t outlen;1941 int rc;1942 1943 rc = efx_siena_mcdi_rpc(efx, MC_CMD_WOL_FILTER_GET, NULL, 0,1944 outbuf, sizeof(outbuf), &outlen);1945 if (rc)1946 goto fail;1947 1948 if (outlen < MC_CMD_WOL_FILTER_GET_OUT_LEN) {1949 rc = -EIO;1950 goto fail;1951 }1952 1953 *id_out = (int)MCDI_DWORD(outbuf, WOL_FILTER_GET_OUT_FILTER_ID);1954 1955 return 0;1956 1957fail:1958 *id_out = -1;1959 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);1960 return rc;1961}1962 1963 1964int efx_siena_mcdi_wol_filter_remove(struct efx_nic *efx, int id)1965{1966 MCDI_DECLARE_BUF(inbuf, MC_CMD_WOL_FILTER_REMOVE_IN_LEN);1967 int rc;1968 1969 MCDI_SET_DWORD(inbuf, WOL_FILTER_REMOVE_IN_FILTER_ID, (u32)id);1970 1971 rc = efx_siena_mcdi_rpc(efx, MC_CMD_WOL_FILTER_REMOVE, inbuf,1972 sizeof(inbuf), NULL, 0, NULL);1973 return rc;1974}1975 1976int efx_siena_mcdi_flush_rxqs(struct efx_nic *efx)1977{1978 struct efx_channel *channel;1979 struct efx_rx_queue *rx_queue;1980 MCDI_DECLARE_BUF(inbuf,1981 MC_CMD_FLUSH_RX_QUEUES_IN_LEN(EFX_MAX_CHANNELS));1982 int rc, count;1983 1984 BUILD_BUG_ON(EFX_MAX_CHANNELS >1985 MC_CMD_FLUSH_RX_QUEUES_IN_QID_OFST_MAXNUM);1986 1987 count = 0;1988 efx_for_each_channel(channel, efx) {1989 efx_for_each_channel_rx_queue(rx_queue, channel) {1990 if (rx_queue->flush_pending) {1991 rx_queue->flush_pending = false;1992 atomic_dec(&efx->rxq_flush_pending);1993 MCDI_SET_ARRAY_DWORD(1994 inbuf, FLUSH_RX_QUEUES_IN_QID_OFST,1995 count, efx_rx_queue_index(rx_queue));1996 count++;1997 }1998 }1999 }2000 2001 rc = efx_siena_mcdi_rpc(efx, MC_CMD_FLUSH_RX_QUEUES, inbuf,2002 MC_CMD_FLUSH_RX_QUEUES_IN_LEN(count),2003 NULL, 0, NULL);2004 WARN_ON(rc < 0);2005 2006 return rc;2007}2008 2009int efx_siena_mcdi_wol_filter_reset(struct efx_nic *efx)2010{2011 int rc;2012 2013 rc = efx_siena_mcdi_rpc(efx, MC_CMD_WOL_FILTER_RESET, NULL, 0,2014 NULL, 0, NULL);2015 return rc;2016}2017 2018#ifdef CONFIG_SFC_SIENA_MTD2019 2020#define EFX_MCDI_NVRAM_LEN_MAX 1282021 2022static int efx_mcdi_nvram_update_start(struct efx_nic *efx, unsigned int type)2023{2024 MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_UPDATE_START_V2_IN_LEN);2025 int rc;2026 2027 MCDI_SET_DWORD(inbuf, NVRAM_UPDATE_START_IN_TYPE, type);2028 MCDI_POPULATE_DWORD_1(inbuf, NVRAM_UPDATE_START_V2_IN_FLAGS,2029 NVRAM_UPDATE_START_V2_IN_FLAG_REPORT_VERIFY_RESULT,2030 1);2031 2032 BUILD_BUG_ON(MC_CMD_NVRAM_UPDATE_START_OUT_LEN != 0);2033 2034 rc = efx_siena_mcdi_rpc(efx, MC_CMD_NVRAM_UPDATE_START, inbuf,2035 sizeof(inbuf), NULL, 0, NULL);2036 2037 return rc;2038}2039 2040static int efx_mcdi_nvram_read(struct efx_nic *efx, unsigned int type,2041 loff_t offset, u8 *buffer, size_t length)2042{2043 MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_READ_IN_V2_LEN);2044 MCDI_DECLARE_BUF(outbuf,2045 MC_CMD_NVRAM_READ_OUT_LEN(EFX_MCDI_NVRAM_LEN_MAX));2046 size_t outlen;2047 int rc;2048 2049 MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_TYPE, type);2050 MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_OFFSET, offset);2051 MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_LENGTH, length);2052 MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_V2_MODE,2053 MC_CMD_NVRAM_READ_IN_V2_DEFAULT);2054 2055 rc = efx_siena_mcdi_rpc(efx, MC_CMD_NVRAM_READ, inbuf, sizeof(inbuf),2056 outbuf, sizeof(outbuf), &outlen);2057 if (rc)2058 return rc;2059 2060 memcpy(buffer, MCDI_PTR(outbuf, NVRAM_READ_OUT_READ_BUFFER), length);2061 return 0;2062}2063 2064static int efx_mcdi_nvram_write(struct efx_nic *efx, unsigned int type,2065 loff_t offset, const u8 *buffer, size_t length)2066{2067 MCDI_DECLARE_BUF(inbuf,2068 MC_CMD_NVRAM_WRITE_IN_LEN(EFX_MCDI_NVRAM_LEN_MAX));2069 int rc;2070 2071 MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_TYPE, type);2072 MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_OFFSET, offset);2073 MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_LENGTH, length);2074 memcpy(MCDI_PTR(inbuf, NVRAM_WRITE_IN_WRITE_BUFFER), buffer, length);2075 2076 BUILD_BUG_ON(MC_CMD_NVRAM_WRITE_OUT_LEN != 0);2077 2078 rc = efx_siena_mcdi_rpc(efx, MC_CMD_NVRAM_WRITE, inbuf,2079 ALIGN(MC_CMD_NVRAM_WRITE_IN_LEN(length), 4),2080 NULL, 0, NULL);2081 return rc;2082}2083 2084static int efx_mcdi_nvram_erase(struct efx_nic *efx, unsigned int type,2085 loff_t offset, size_t length)2086{2087 MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_ERASE_IN_LEN);2088 int rc;2089 2090 MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_TYPE, type);2091 MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_OFFSET, offset);2092 MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_LENGTH, length);2093 2094 BUILD_BUG_ON(MC_CMD_NVRAM_ERASE_OUT_LEN != 0);2095 2096 rc = efx_siena_mcdi_rpc(efx, MC_CMD_NVRAM_ERASE, inbuf, sizeof(inbuf),2097 NULL, 0, NULL);2098 return rc;2099}2100 2101static int efx_mcdi_nvram_update_finish(struct efx_nic *efx, unsigned int type)2102{2103 MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_UPDATE_FINISH_V2_IN_LEN);2104 MCDI_DECLARE_BUF(outbuf, MC_CMD_NVRAM_UPDATE_FINISH_V2_OUT_LEN);2105 size_t outlen;2106 int rc, rc2;2107 2108 MCDI_SET_DWORD(inbuf, NVRAM_UPDATE_FINISH_IN_TYPE, type);2109 /* Always set this flag. Old firmware ignores it */2110 MCDI_POPULATE_DWORD_1(inbuf, NVRAM_UPDATE_FINISH_V2_IN_FLAGS,2111 NVRAM_UPDATE_FINISH_V2_IN_FLAG_REPORT_VERIFY_RESULT,2112 1);2113 2114 rc = efx_siena_mcdi_rpc(efx, MC_CMD_NVRAM_UPDATE_FINISH, inbuf,2115 sizeof(inbuf), outbuf, sizeof(outbuf), &outlen);2116 if (!rc && outlen >= MC_CMD_NVRAM_UPDATE_FINISH_V2_OUT_LEN) {2117 rc2 = MCDI_DWORD(outbuf, NVRAM_UPDATE_FINISH_V2_OUT_RESULT_CODE);2118 if (rc2 != MC_CMD_NVRAM_VERIFY_RC_SUCCESS)2119 netif_err(efx, drv, efx->net_dev,2120 "NVRAM update failed verification with code 0x%x\n",2121 rc2);2122 switch (rc2) {2123 case MC_CMD_NVRAM_VERIFY_RC_SUCCESS:2124 break;2125 case MC_CMD_NVRAM_VERIFY_RC_CMS_CHECK_FAILED:2126 case MC_CMD_NVRAM_VERIFY_RC_MESSAGE_DIGEST_CHECK_FAILED:2127 case MC_CMD_NVRAM_VERIFY_RC_SIGNATURE_CHECK_FAILED:2128 case MC_CMD_NVRAM_VERIFY_RC_TRUSTED_APPROVERS_CHECK_FAILED:2129 case MC_CMD_NVRAM_VERIFY_RC_SIGNATURE_CHAIN_CHECK_FAILED:2130 rc = -EIO;2131 break;2132 case MC_CMD_NVRAM_VERIFY_RC_INVALID_CMS_FORMAT:2133 case MC_CMD_NVRAM_VERIFY_RC_BAD_MESSAGE_DIGEST:2134 rc = -EINVAL;2135 break;2136 case MC_CMD_NVRAM_VERIFY_RC_NO_VALID_SIGNATURES:2137 case MC_CMD_NVRAM_VERIFY_RC_NO_TRUSTED_APPROVERS:2138 case MC_CMD_NVRAM_VERIFY_RC_NO_SIGNATURE_MATCH:2139 rc = -EPERM;2140 break;2141 default:2142 netif_err(efx, drv, efx->net_dev,2143 "Unknown response to NVRAM_UPDATE_FINISH\n");2144 rc = -EIO;2145 }2146 }2147 2148 return rc;2149}2150 2151int efx_siena_mcdi_mtd_read(struct mtd_info *mtd, loff_t start,2152 size_t len, size_t *retlen, u8 *buffer)2153{2154 struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd);2155 struct efx_nic *efx = mtd->priv;2156 loff_t offset = start;2157 loff_t end = min_t(loff_t, start + len, mtd->size);2158 size_t chunk;2159 int rc = 0;2160 2161 while (offset < end) {2162 chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX);2163 rc = efx_mcdi_nvram_read(efx, part->nvram_type, offset,2164 buffer, chunk);2165 if (rc)2166 goto out;2167 offset += chunk;2168 buffer += chunk;2169 }2170out:2171 *retlen = offset - start;2172 return rc;2173}2174 2175int efx_siena_mcdi_mtd_erase(struct mtd_info *mtd, loff_t start, size_t len)2176{2177 struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd);2178 struct efx_nic *efx = mtd->priv;2179 loff_t offset = start & ~((loff_t)(mtd->erasesize - 1));2180 loff_t end = min_t(loff_t, start + len, mtd->size);2181 size_t chunk = part->common.mtd.erasesize;2182 int rc = 0;2183 2184 if (!part->updating) {2185 rc = efx_mcdi_nvram_update_start(efx, part->nvram_type);2186 if (rc)2187 goto out;2188 part->updating = true;2189 }2190 2191 /* The MCDI interface can in fact do multiple erase blocks at once;2192 * but erasing may be slow, so we make multiple calls here to avoid2193 * tripping the MCDI RPC timeout. */2194 while (offset < end) {2195 rc = efx_mcdi_nvram_erase(efx, part->nvram_type, offset,2196 chunk);2197 if (rc)2198 goto out;2199 offset += chunk;2200 }2201out:2202 return rc;2203}2204 2205int efx_siena_mcdi_mtd_write(struct mtd_info *mtd, loff_t start,2206 size_t len, size_t *retlen, const u8 *buffer)2207{2208 struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd);2209 struct efx_nic *efx = mtd->priv;2210 loff_t offset = start;2211 loff_t end = min_t(loff_t, start + len, mtd->size);2212 size_t chunk;2213 int rc = 0;2214 2215 if (!part->updating) {2216 rc = efx_mcdi_nvram_update_start(efx, part->nvram_type);2217 if (rc)2218 goto out;2219 part->updating = true;2220 }2221 2222 while (offset < end) {2223 chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX);2224 rc = efx_mcdi_nvram_write(efx, part->nvram_type, offset,2225 buffer, chunk);2226 if (rc)2227 goto out;2228 offset += chunk;2229 buffer += chunk;2230 }2231out:2232 *retlen = offset - start;2233 return rc;2234}2235 2236int efx_siena_mcdi_mtd_sync(struct mtd_info *mtd)2237{2238 struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd);2239 struct efx_nic *efx = mtd->priv;2240 int rc = 0;2241 2242 if (part->updating) {2243 part->updating = false;2244 rc = efx_mcdi_nvram_update_finish(efx, part->nvram_type);2245 }2246 2247 return rc;2248}2249 2250void efx_siena_mcdi_mtd_rename(struct efx_mtd_partition *part)2251{2252 struct efx_mcdi_mtd_partition *mcdi_part =2253 container_of(part, struct efx_mcdi_mtd_partition, common);2254 struct efx_nic *efx = part->mtd.priv;2255 2256 snprintf(part->name, sizeof(part->name), "%s %s:%02x",2257 efx->name, part->type_name, mcdi_part->fw_subtype);2258}2259 2260#endif /* CONFIG_SFC_SIENA_MTD */2261