718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
380 lines
9.1 KiB
C
380 lines
9.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2010-2016 Solarflare Communications Inc.
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* All rights reserved.
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*
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* This software was developed in part by Philip Paeps under contract for
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* Solarflare Communications, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and documentation are
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* those of the authors and should not be interpreted as representing official
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* policies, either expressed or implied, of the FreeBSD Project.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/condvar.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/syslog.h>
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#include <sys/taskqueue.h>
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#include <sys/malloc.h>
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#include "common/efx.h"
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#include "common/efx_mcdi.h"
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#include "common/efx_regs_mcdi.h"
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#include "sfxge.h"
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#if EFSYS_OPT_MCDI_LOGGING
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#include <dev/pci/pcivar.h>
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#endif
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#define SFXGE_MCDI_POLL_INTERVAL_MIN 10 /* 10us in 1us units */
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#define SFXGE_MCDI_POLL_INTERVAL_MAX 100000 /* 100ms in 1us units */
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static void
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sfxge_mcdi_timeout(struct sfxge_softc *sc)
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{
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device_t dev = sc->dev;
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log(LOG_WARNING, "[%s%d] MC_TIMEOUT", device_get_name(dev),
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device_get_unit(dev));
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EFSYS_PROBE(mcdi_timeout);
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sfxge_schedule_reset(sc);
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}
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static void
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sfxge_mcdi_poll(struct sfxge_softc *sc, uint32_t timeout_us)
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{
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efx_nic_t *enp;
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clock_t delay_total;
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clock_t delay_us;
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boolean_t aborted;
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delay_total = 0;
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delay_us = SFXGE_MCDI_POLL_INTERVAL_MIN;
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enp = sc->enp;
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do {
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if (efx_mcdi_request_poll(enp)) {
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EFSYS_PROBE1(mcdi_delay, clock_t, delay_total);
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return;
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}
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if (delay_total > timeout_us) {
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aborted = efx_mcdi_request_abort(enp);
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KASSERT(aborted, ("abort failed"));
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sfxge_mcdi_timeout(sc);
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return;
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}
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/* Spin or block depending on delay interval. */
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if (delay_us < 1000000)
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DELAY(delay_us);
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else
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pause("mcdi wait", delay_us * hz / 1000000);
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delay_total += delay_us;
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/* Exponentially back off the poll frequency. */
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delay_us = delay_us * 2;
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if (delay_us > SFXGE_MCDI_POLL_INTERVAL_MAX)
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delay_us = SFXGE_MCDI_POLL_INTERVAL_MAX;
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} while (1);
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}
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static void
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sfxge_mcdi_execute(void *arg, efx_mcdi_req_t *emrp)
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{
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struct sfxge_softc *sc;
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struct sfxge_mcdi *mcdi;
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uint32_t timeout_us = 0;
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sc = (struct sfxge_softc *)arg;
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mcdi = &sc->mcdi;
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SFXGE_MCDI_LOCK(mcdi);
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KASSERT(mcdi->state == SFXGE_MCDI_INITIALIZED,
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("MCDI not initialized"));
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/* Issue request and poll for completion. */
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efx_mcdi_get_timeout(sc->enp, emrp, &timeout_us);
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KASSERT(timeout_us > 0, ("MCDI timeout not initialized"));
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efx_mcdi_request_start(sc->enp, emrp, B_FALSE);
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sfxge_mcdi_poll(sc, timeout_us);
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SFXGE_MCDI_UNLOCK(mcdi);
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}
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static void
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sfxge_mcdi_ev_cpl(void *arg)
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{
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struct sfxge_softc *sc;
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struct sfxge_mcdi *mcdi;
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sc = (struct sfxge_softc *)arg;
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mcdi = &sc->mcdi;
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KASSERT(mcdi->state == SFXGE_MCDI_INITIALIZED,
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("MCDI not initialized"));
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/* We do not use MCDI completion, MCDI is simply polled */
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}
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static void
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sfxge_mcdi_exception(void *arg, efx_mcdi_exception_t eme)
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{
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struct sfxge_softc *sc;
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device_t dev;
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sc = (struct sfxge_softc *)arg;
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dev = sc->dev;
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log(LOG_WARNING, "[%s%d] MC_%s", device_get_name(dev),
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device_get_unit(dev),
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(eme == EFX_MCDI_EXCEPTION_MC_REBOOT)
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? "REBOOT"
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: (eme == EFX_MCDI_EXCEPTION_MC_BADASSERT)
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? "BADASSERT" : "UNKNOWN");
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EFSYS_PROBE(mcdi_exception);
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sfxge_schedule_reset(sc);
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}
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#if EFSYS_OPT_MCDI_LOGGING
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#define SFXGE_MCDI_LOG_BUF_SIZE 128
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static size_t
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sfxge_mcdi_do_log(char *buffer, void *data, size_t data_size,
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size_t pfxsize, size_t position)
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{
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uint32_t *words = data;
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size_t i;
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for (i = 0; i < data_size; i += sizeof(*words)) {
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if (position + 2 * sizeof(*words) + 1 >= SFXGE_MCDI_LOG_BUF_SIZE) {
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buffer[position] = '\0';
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printf("%s \\\n", buffer);
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position = pfxsize;
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}
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snprintf(buffer + position, SFXGE_MCDI_LOG_BUF_SIZE - position,
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" %08x", *words);
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words++;
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position += 2 * sizeof(uint32_t) + 1;
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}
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return (position);
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}
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static void
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sfxge_mcdi_logger(void *arg, efx_log_msg_t type,
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void *header, size_t header_size,
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void *data, size_t data_size)
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{
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struct sfxge_softc *sc = (struct sfxge_softc *)arg;
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char buffer[SFXGE_MCDI_LOG_BUF_SIZE];
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size_t pfxsize;
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size_t start;
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if (!sc->mcdi_logging)
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return;
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pfxsize = snprintf(buffer, sizeof(buffer),
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"sfc %04x:%02x:%02x.%02x %s MCDI RPC %s:",
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pci_get_domain(sc->dev),
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pci_get_bus(sc->dev),
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pci_get_slot(sc->dev),
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pci_get_function(sc->dev),
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device_get_nameunit(sc->dev),
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type == EFX_LOG_MCDI_REQUEST ? "REQ" :
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type == EFX_LOG_MCDI_RESPONSE ? "RESP" : "???");
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start = sfxge_mcdi_do_log(buffer, header, header_size,
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pfxsize, pfxsize);
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start = sfxge_mcdi_do_log(buffer, data, data_size, pfxsize, start);
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if (start != pfxsize) {
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buffer[start] = '\0';
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printf("%s\n", buffer);
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}
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}
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#endif
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int
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sfxge_mcdi_ioctl(struct sfxge_softc *sc, sfxge_ioc_t *ip)
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{
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const efx_nic_cfg_t *encp = efx_nic_cfg_get(sc->enp);
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struct sfxge_mcdi *mp = &(sc->mcdi);
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efx_mcdi_req_t emr;
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uint8_t *mcdibuf;
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int rc;
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if (mp->state == SFXGE_MCDI_UNINITIALIZED) {
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rc = ENODEV;
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goto fail1;
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}
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if (!(encp->enc_features & EFX_FEATURE_MCDI)) {
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rc = ENOTSUP;
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goto fail2;
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}
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if (ip->u.mcdi.len > SFXGE_MCDI_MAX_PAYLOAD) {
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rc = EINVAL;
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goto fail3;
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}
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mcdibuf = malloc(SFXGE_MCDI_MAX_PAYLOAD, M_TEMP, M_WAITOK | M_ZERO);
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if ((rc = copyin(ip->u.mcdi.payload, mcdibuf, ip->u.mcdi.len)) != 0) {
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goto fail5;
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}
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emr.emr_cmd = ip->u.mcdi.cmd;
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emr.emr_in_buf = mcdibuf;
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emr.emr_in_length = ip->u.mcdi.len;
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emr.emr_out_buf = mcdibuf;
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emr.emr_out_length = SFXGE_MCDI_MAX_PAYLOAD;
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sfxge_mcdi_execute(sc, &emr);
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ip->u.mcdi.rc = emr.emr_rc;
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ip->u.mcdi.cmd = emr.emr_cmd;
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ip->u.mcdi.len = emr.emr_out_length_used;
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if ((rc = copyout(mcdibuf, ip->u.mcdi.payload, ip->u.mcdi.len)) != 0) {
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goto fail6;
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}
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/*
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* Helpfully trigger a device reset in response to an MCDI_CMD_REBOOT
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* Both ports will see ->emt_exception callbacks on the next MCDI poll
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*/
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if (ip->u.mcdi.cmd == MC_CMD_REBOOT) {
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EFSYS_PROBE(mcdi_ioctl_mc_reboot);
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/* sfxge_t->s_state_lock held */
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(void) sfxge_schedule_reset(sc);
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}
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free(mcdibuf, M_TEMP);
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return (0);
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fail6:
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fail5:
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free(mcdibuf, M_TEMP);
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fail3:
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fail2:
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fail1:
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return (rc);
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}
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int
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sfxge_mcdi_init(struct sfxge_softc *sc)
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{
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efx_nic_t *enp;
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struct sfxge_mcdi *mcdi;
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efx_mcdi_transport_t *emtp;
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efsys_mem_t *esmp;
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int max_msg_size;
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int rc;
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enp = sc->enp;
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mcdi = &sc->mcdi;
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emtp = &mcdi->transport;
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esmp = &mcdi->mem;
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max_msg_size = sizeof (uint32_t) + MCDI_CTL_SDU_LEN_MAX_V2;
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KASSERT(mcdi->state == SFXGE_MCDI_UNINITIALIZED,
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("MCDI already initialized"));
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SFXGE_MCDI_LOCK_INIT(mcdi, device_get_nameunit(sc->dev));
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mcdi->state = SFXGE_MCDI_INITIALIZED;
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if ((rc = sfxge_dma_alloc(sc, max_msg_size, esmp)) != 0)
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goto fail;
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emtp->emt_context = sc;
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emtp->emt_dma_mem = esmp;
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emtp->emt_execute = sfxge_mcdi_execute;
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emtp->emt_ev_cpl = sfxge_mcdi_ev_cpl;
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emtp->emt_exception = sfxge_mcdi_exception;
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#if EFSYS_OPT_MCDI_LOGGING
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emtp->emt_logger = sfxge_mcdi_logger;
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SYSCTL_ADD_INT(device_get_sysctl_ctx(sc->dev),
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SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)),
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OID_AUTO, "mcdi_logging", CTLFLAG_RW,
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&sc->mcdi_logging, 0,
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"MCDI logging");
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#endif
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if ((rc = efx_mcdi_init(enp, emtp)) != 0)
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goto fail;
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return (0);
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fail:
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SFXGE_MCDI_LOCK_DESTROY(mcdi);
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mcdi->state = SFXGE_MCDI_UNINITIALIZED;
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return (rc);
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}
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void
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sfxge_mcdi_fini(struct sfxge_softc *sc)
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{
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struct sfxge_mcdi *mcdi;
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efx_nic_t *enp;
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efx_mcdi_transport_t *emtp;
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efsys_mem_t *esmp;
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enp = sc->enp;
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mcdi = &sc->mcdi;
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emtp = &mcdi->transport;
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esmp = &mcdi->mem;
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SFXGE_MCDI_LOCK(mcdi);
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KASSERT(mcdi->state == SFXGE_MCDI_INITIALIZED,
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("MCDI not initialized"));
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efx_mcdi_fini(enp);
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bzero(emtp, sizeof(*emtp));
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SFXGE_MCDI_UNLOCK(mcdi);
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sfxge_dma_free(esmp);
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SFXGE_MCDI_LOCK_DESTROY(mcdi);
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}
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