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3745c395ec
to kproc_xxx as they actually make whole processes. Thos makes way for us to add REAL kthread_create() and friends that actually make theads. it turns out that most of these calls actually end up being moved back to the thread version when it's added. but we need to make this cosmetic change first. I'd LOVE to do this rename in 7.0 so that we can eventually MFC the new kthread_xxx() calls.
408 lines
9.7 KiB
C
408 lines
9.7 KiB
C
/*-
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* Copyright (c) 2006 IronPort Systems Inc. <ambrisko@ironport.com>
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* All rights reserved.
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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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/systm.h>
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#include <sys/bus.h>
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#include <sys/condvar.h>
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#include <sys/eventhandler.h>
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#include <sys/kernel.h>
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#include <sys/kthread.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/selinfo.h>
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#include <machine/bus.h>
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#ifdef LOCAL_MODULE
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#include <ipmi.h>
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#include <ipmivars.h>
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#else
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#include <sys/ipmi.h>
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#include <dev/ipmi/ipmivars.h>
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#endif
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static void smic_wait_for_tx_okay(struct ipmi_softc *);
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static void smic_wait_for_rx_okay(struct ipmi_softc *);
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static void smic_wait_for_not_busy(struct ipmi_softc *);
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static void smic_set_busy(struct ipmi_softc *);
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static void
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smic_wait_for_tx_okay(struct ipmi_softc *sc)
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{
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int flags;
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do {
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flags = INB(sc, SMIC_FLAGS);
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} while (!(flags & SMIC_STATUS_TX_RDY));
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}
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static void
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smic_wait_for_rx_okay(struct ipmi_softc *sc)
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{
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int flags;
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do {
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flags = INB(sc, SMIC_FLAGS);
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} while (!(flags & SMIC_STATUS_RX_RDY));
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}
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static void
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smic_wait_for_not_busy(struct ipmi_softc *sc)
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{
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int flags;
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do {
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flags = INB(sc, SMIC_FLAGS);
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} while (flags & SMIC_STATUS_BUSY);
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}
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static void
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smic_set_busy(struct ipmi_softc *sc)
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{
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int flags;
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flags = INB(sc, SMIC_FLAGS);
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flags |= SMIC_STATUS_BUSY;
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flags &= ~SMIC_STATUS_RESERVED;
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OUTB(sc, SMIC_FLAGS, flags);
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}
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/*
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* Start a transfer with a WR_START transaction that sends the NetFn/LUN
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* address.
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*/
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static int
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smic_start_write(struct ipmi_softc *sc, u_char data)
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{
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u_char error, status;
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smic_wait_for_not_busy(sc);
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OUTB(sc, SMIC_CTL_STS, SMIC_CC_SMS_WR_START);
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OUTB(sc, SMIC_DATA, data);
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smic_set_busy(sc);
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smic_wait_for_not_busy(sc);
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status = INB(sc, SMIC_CTL_STS);
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if (status != SMIC_SC_SMS_WR_START) {
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error = INB(sc, SMIC_DATA);
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device_printf(sc->ipmi_dev, "SMIC: Write did not start %02x\n",
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error);
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return (0);
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}
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return (1);
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}
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/*
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* Write a byte in the middle of the message (either the command or one of
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* the data bytes) using a WR_NEXT transaction.
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*/
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static int
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smic_write_next(struct ipmi_softc *sc, u_char data)
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{
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u_char error, status;
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smic_wait_for_tx_okay(sc);
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OUTB(sc, SMIC_CTL_STS, SMIC_CC_SMS_WR_NEXT);
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OUTB(sc, SMIC_DATA, data);
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smic_set_busy(sc);
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smic_wait_for_not_busy(sc);
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status = INB(sc, SMIC_CTL_STS);
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if (status != SMIC_SC_SMS_WR_NEXT) {
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error = INB(sc, SMIC_DATA);
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device_printf(sc->ipmi_dev, "SMIC: Write did not next %02x\n",
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error);
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return (0);
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}
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return (1);
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}
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/*
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* Write the last byte of a transfer to end the write phase via a WR_END
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* transaction.
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*/
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static int
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smic_write_last(struct ipmi_softc *sc, u_char data)
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{
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u_char error, status;
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smic_wait_for_tx_okay(sc);
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OUTB(sc, SMIC_CTL_STS, SMIC_CC_SMS_WR_END);
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OUTB(sc, SMIC_DATA, data);
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smic_set_busy(sc);
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smic_wait_for_not_busy(sc);
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status = INB(sc, SMIC_CTL_STS);
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if (status != SMIC_SC_SMS_WR_END) {
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error = INB(sc, SMIC_DATA);
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device_printf(sc->ipmi_dev, "SMIC: Write did not end %02x\n",
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error);
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return (0);
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}
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return (1);
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}
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/*
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* Start the read phase of a transfer with a RD_START transaction.
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*/
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static int
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smic_start_read(struct ipmi_softc *sc, u_char *data)
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{
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u_char error, status;
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smic_wait_for_not_busy(sc);
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smic_wait_for_rx_okay(sc);
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OUTB(sc, SMIC_CTL_STS, SMIC_CC_SMS_RD_START);
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smic_set_busy(sc);
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smic_wait_for_not_busy(sc);
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status = INB(sc, SMIC_CTL_STS);
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if (status != SMIC_SC_SMS_RD_START) {
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error = INB(sc, SMIC_DATA);
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device_printf(sc->ipmi_dev, "SMIC: Read did not start %02x\n",
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error);
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return (0);
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}
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*data = INB(sc, SMIC_DATA);
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return (1);
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}
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/*
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* Read a byte via a RD_NEXT transaction. If this was the last byte, return
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* 2 rather than 1.
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*/
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static int
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smic_read_byte(struct ipmi_softc *sc, u_char *data)
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{
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u_char error, status;
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smic_wait_for_rx_okay(sc);
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OUTB(sc, SMIC_CTL_STS, SMIC_SC_SMS_RD_NEXT);
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smic_set_busy(sc);
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smic_wait_for_not_busy(sc);
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status = INB(sc, SMIC_CTL_STS);
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if (status != SMIC_SC_SMS_RD_NEXT &&
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status != SMIC_SC_SMS_RD_END) {
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error = INB(sc, SMIC_DATA);
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device_printf(sc->ipmi_dev, "SMIC: Read did not next %02x\n",
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error);
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return (0);
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}
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*data = INB(sc, SMIC_DATA);
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if (status == SMIC_SC_SMS_RD_NEXT)
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return (1);
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else
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return (2);
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}
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/* Complete a transfer via a RD_END transaction after reading the last byte. */
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static int
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smic_read_end(struct ipmi_softc *sc)
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{
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u_char error, status;
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OUTB(sc, SMIC_CTL_STS, SMIC_CC_SMS_RD_END);
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smic_set_busy(sc);
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smic_wait_for_not_busy(sc);
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status = INB(sc, SMIC_CTL_STS);
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if (status != SMIC_SC_SMS_RDY) {
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error = INB(sc, SMIC_DATA);
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device_printf(sc->ipmi_dev, "SMIC: Read did not end %02x\n",
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error);
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return (0);
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}
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return (1);
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}
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static int
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smic_polled_request(struct ipmi_softc *sc, struct ipmi_request *req)
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{
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u_char *cp, data;
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int i, state;
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/* First, start the message with the address. */
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if (!smic_start_write(sc, req->ir_addr))
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return (0);
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#ifdef SMIC_DEBUG
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device_printf(sc->ipmi_dev, "SMIC: WRITE_START address: %02x\n",
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req->ir_addr);
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#endif
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if (req->ir_requestlen == 0) {
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/* Send the command as the last byte. */
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if (!smic_write_last(sc, req->ir_command))
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return (0);
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#ifdef SMIC_DEBUG
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device_printf(sc->ipmi_dev, "SMIC: Wrote command: %02x\n",
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req->ir_command);
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#endif
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} else {
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/* Send the command. */
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if (!smic_write_next(sc, req->ir_command))
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return (0);
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#ifdef SMIC_DEBUG
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device_printf(sc->ipmi_dev, "SMIC: Wrote command: %02x\n",
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req->ir_command);
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#endif
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/* Send the payload. */
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cp = req->ir_request;
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for (i = 0; i < req->ir_requestlen - 1; i++) {
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if (!smic_write_next(sc, *cp++))
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return (0);
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#ifdef SMIC_DEBUG
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device_printf(sc->ipmi_dev, "SMIC: Wrote data: %02x\n",
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cp[-1]);
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#endif
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}
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if (!smic_write_last(sc, *cp))
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return (0);
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#ifdef SMIC_DEBUG
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device_printf(sc->ipmi_dev, "SMIC: Write last data: %02x\n",
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*cp);
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#endif
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}
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/* Start the read phase by reading the NetFn/LUN. */
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if (smic_start_read(sc, &data) != 1)
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return (0);
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#ifdef SMIC_DEBUG
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device_printf(sc->ipmi_dev, "SMIC: Read address: %02x\n", data);
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#endif
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if (data != IPMI_REPLY_ADDR(req->ir_addr)) {
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device_printf(sc->ipmi_dev, "SMIC: Reply address mismatch\n");
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return (0);
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}
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/* Read the command. */
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if (smic_read_byte(sc, &data) != 1)
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return (0);
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#ifdef SMIC_DEBUG
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device_printf(sc->ipmi_dev, "SMIC: Read command: %02x\n", data);
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#endif
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if (data != req->ir_command) {
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device_printf(sc->ipmi_dev, "SMIC: Command mismatch\n");
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return (0);
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}
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/* Read the completion code. */
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state = smic_read_byte(sc, &req->ir_compcode);
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if (state == 0)
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return (0);
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#ifdef SMIC_DEBUG
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device_printf(sc->ipmi_dev, "SMIC: Read completion code: %02x\n",
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req->ir_compcode);
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#endif
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/* Finally, read the reply from the BMC. */
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i = 0;
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while (state == 1) {
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state = smic_read_byte(sc, &data);
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if (state == 0)
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return (0);
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if (i < req->ir_replybuflen) {
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req->ir_reply[i] = data;
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#ifdef SMIC_DEBUG
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device_printf(sc->ipmi_dev, "SMIC: Read data: %02x\n",
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data);
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} else {
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device_printf(sc->ipmi_dev,
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"SMIC: Read short %02x byte %d\n", data, i + 1);
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#endif
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}
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i++;
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}
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/* Terminate the transfer. */
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if (!smic_read_end(sc))
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return (0);
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req->ir_replylen = i;
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#ifdef SMIC_DEBUG
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device_printf(sc->ipmi_dev, "SMIC: READ finished (%d bytes)\n", i);
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if (req->ir_replybuflen < i)
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#else
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if (req->ir_replybuflen < i && req->ir_replybuflen != 0)
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#endif
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device_printf(sc->ipmi_dev,
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"SMIC: Read short: %zd buffer, %d actual\n",
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req->ir_replybuflen, i);
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return (1);
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}
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static void
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smic_loop(void *arg)
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{
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struct ipmi_softc *sc = arg;
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struct ipmi_request *req;
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int i, ok;
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IPMI_LOCK(sc);
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while ((req = ipmi_dequeue_request(sc)) != NULL) {
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ok = 0;
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for (i = 0; i < 3 && !ok; i++)
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ok = smic_polled_request(sc, req);
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if (ok)
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req->ir_error = 0;
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else
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req->ir_error = EIO;
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ipmi_complete_request(sc, req);
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}
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IPMI_UNLOCK(sc);
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kproc_exit(0);
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}
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static int
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smic_startup(struct ipmi_softc *sc)
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{
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return (kproc_create(smic_loop, sc, &sc->ipmi_kthread, 0, 0,
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"%s: smic", device_get_nameunit(sc->ipmi_dev)));
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}
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int
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ipmi_smic_attach(struct ipmi_softc *sc)
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{
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int flags;
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/* Setup function pointers. */
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sc->ipmi_startup = smic_startup;
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sc->ipmi_enqueue_request = ipmi_polled_enqueue_request;
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/* See if we can talk to the controller. */
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flags = INB(sc, SMIC_FLAGS);
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if (flags == 0xff) {
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device_printf(sc->ipmi_dev, "couldn't find it\n");
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return (ENXIO);
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}
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#ifdef SMIC_DEBUG
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device_printf(sc->ipmi_dev, "SMIC: initial state: %02x\n", flags);
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#endif
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return (0);
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}
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