615 lines
14 KiB
C
615 lines
14 KiB
C
/*-
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* Copyright (C) 2011,2015 by Nathan Whitehorn. 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, 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, EVEN IF
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* ADVISED OF THE POSSIBILITY OF 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/endian.h>
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/cons.h>
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#include <sys/kdb.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/tty.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/bus.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/uart/uart.h>
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#include <dev/uart/uart_cpu.h>
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#include <dev/uart/uart_bus.h>
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#include "opal.h"
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#include "uart_if.h"
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struct uart_opal_softc {
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device_t dev;
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phandle_t node;
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int vtermid;
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struct tty *tp;
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struct resource *irqres;
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int irqrid;
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struct callout callout;
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void *sc_icookie;
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int polltime;
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struct mtx sc_mtx;
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int protocol;
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char opal_inbuf[16];
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uint64_t inbuflen;
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uint8_t outseqno;
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#if defined(KDB)
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int alt_break_state;
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#endif
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};
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static struct uart_opal_softc *console_sc = NULL;
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static struct consdev *stdout_cp;
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enum {
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OPAL_RAW, OPAL_HVSI
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};
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#define VS_DATA_PACKET_HEADER 0xff
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#define VS_CONTROL_PACKET_HEADER 0xfe
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#define VSV_SET_MODEM_CTL 0x01
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#define VSV_MODEM_CTL_UPDATE 0x02
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#define VSV_RENEGOTIATE_CONNECTION 0x03
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#define VS_QUERY_PACKET_HEADER 0xfd
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#define VSV_SEND_VERSION_NUMBER 0x01
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#define VSV_SEND_MODEM_CTL_STATUS 0x02
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#define VS_QUERY_RESPONSE_PACKET_HEADER 0xfc
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static int uart_opal_probe(device_t dev);
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static int uart_opal_attach(device_t dev);
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static void uart_opal_intr(void *v);
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static device_method_t uart_opal_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, uart_opal_probe),
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DEVMETHOD(device_attach, uart_opal_attach),
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DEVMETHOD_END
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};
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static driver_t uart_opal_driver = {
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"uart",
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uart_opal_methods,
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sizeof(struct uart_opal_softc),
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};
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DRIVER_MODULE(uart_opal, opalcons, uart_opal_driver, 0, 0);
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static int uart_opal_getc(struct uart_opal_softc *sc);
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static cn_probe_t uart_opal_cnprobe;
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static cn_init_t uart_opal_cninit;
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static cn_term_t uart_opal_cnterm;
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static cn_getc_t uart_opal_cngetc;
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static cn_putc_t uart_opal_cnputc;
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static cn_grab_t uart_opal_cngrab;
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static cn_ungrab_t uart_opal_cnungrab;
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CONSOLE_DRIVER(uart_opal);
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static void uart_opal_ttyoutwakeup(struct tty *tp);
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static struct ttydevsw uart_opal_tty_class = {
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.tsw_flags = TF_INITLOCK|TF_CALLOUT,
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.tsw_outwakeup = uart_opal_ttyoutwakeup,
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};
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static struct {
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char tmpbuf[16];
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uint64_t size;
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struct mtx mtx;
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} opalcons_buffer;
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static void
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uart_opal_real_map_outbuffer(uint64_t *bufferp, uint64_t *lenp)
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{
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if (!mtx_initialized(&opalcons_buffer.mtx))
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mtx_init(&opalcons_buffer.mtx, "uart_opal", NULL,
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MTX_SPIN | MTX_QUIET | MTX_NOWITNESS);
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if (!pmap_bootstrapped)
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return;
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mtx_lock_spin(&opalcons_buffer.mtx);
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opalcons_buffer.size = *(uint64_t *)(*lenp) =
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min(sizeof(opalcons_buffer.tmpbuf), *(uint64_t *)(*lenp));
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memcpy(opalcons_buffer.tmpbuf, (void *)(*bufferp),
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*(uint64_t *)(*lenp));
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*bufferp = (uint64_t)opalcons_buffer.tmpbuf;
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*lenp = (uint64_t)&opalcons_buffer.size;
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}
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static void
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uart_opal_real_unmap_outbuffer(uint64_t *len)
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{
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if (!pmap_bootstrapped)
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return;
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mtx_assert(&opalcons_buffer.mtx, MA_OWNED);
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*len = opalcons_buffer.size;
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mtx_unlock_spin(&opalcons_buffer.mtx);
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}
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static int64_t
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uart_opal_console_write_buffer_space(int vtermid)
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{
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int64_t buffer_space_val = 0;
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vm_paddr_t buffer_space_ptr;
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if (pmap_bootstrapped)
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buffer_space_ptr = vtophys(&buffer_space_val);
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else
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buffer_space_ptr = (vm_paddr_t)&buffer_space_val;
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if (opal_call(OPAL_CONSOLE_WRITE_BUFFER_SPACE, vtermid,
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buffer_space_ptr) != OPAL_SUCCESS)
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return (-1);
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return (be64toh(buffer_space_val));
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}
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static int
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uart_opal_probe_node(struct uart_opal_softc *sc)
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{
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phandle_t node = sc->node;
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uint32_t reg;
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char buf[64];
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sc->inbuflen = 0;
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sc->outseqno = 0;
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if (OF_getprop(node, "device_type", buf, sizeof(buf)) <= 0)
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return (ENXIO);
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if (strcmp(buf, "serial") != 0)
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return (ENXIO);
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reg = -1;
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OF_getencprop(node, "reg", ®, sizeof(reg));
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if (reg == -1)
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return (ENXIO);
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sc->vtermid = reg;
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sc->node = node;
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if (OF_getprop(node, "compatible", buf, sizeof(buf)) <= 0)
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return (ENXIO);
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if (strcmp(buf, "ibm,opal-console-raw") == 0) {
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sc->protocol = OPAL_RAW;
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return (0);
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} else if (strcmp(buf, "ibm,opal-console-hvsi") == 0) {
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sc->protocol = OPAL_HVSI;
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return (0);
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}
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return (ENXIO);
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}
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static int
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uart_opal_probe(device_t dev)
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{
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struct uart_opal_softc sc;
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int err;
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sc.node = ofw_bus_get_node(dev);
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err = uart_opal_probe_node(&sc);
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if (err != 0)
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return (err);
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device_set_desc(dev, "OPAL Serial Port");
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return (err);
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}
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static void
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uart_opal_cnprobe(struct consdev *cp)
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{
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char buf[64];
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phandle_t input, chosen;
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static struct uart_opal_softc sc;
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if (opal_check() != 0)
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goto fail;
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if ((chosen = OF_finddevice("/chosen")) == -1)
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goto fail;
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/* Check if OF has an active stdin/stdout */
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if (OF_getprop(chosen, "linux,stdout-path", buf, sizeof(buf)) <= 0)
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goto fail;
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input = OF_finddevice(buf);
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if (input == -1)
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goto fail;
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sc.node = input;
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if (uart_opal_probe_node(&sc) != 0)
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goto fail;
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mtx_init(&sc.sc_mtx, "uart_opal", NULL, MTX_SPIN | MTX_QUIET |
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MTX_NOWITNESS);
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cp->cn_pri = CN_NORMAL;
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console_sc = ≻
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cp->cn_arg = console_sc;
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stdout_cp = cp;
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return;
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fail:
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cp->cn_pri = CN_DEAD;
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return;
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}
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static int
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uart_opal_attach(device_t dev)
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{
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struct uart_opal_softc *sc;
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int unit;
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sc = device_get_softc(dev);
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sc->node = ofw_bus_get_node(dev);
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uart_opal_probe_node(sc);
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unit = device_get_unit(dev);
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mtx_init(&sc->sc_mtx, device_get_nameunit(dev), NULL,
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MTX_SPIN | MTX_QUIET | MTX_NOWITNESS);
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if (console_sc != NULL && console_sc->vtermid == sc->vtermid) {
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device_printf(dev, "console\n");
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device_set_softc(dev, console_sc);
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sc = console_sc;
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sprintf(uart_opal_consdev.cn_name, "ttyu%r", unit);
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}
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sc->tp = tty_alloc(&uart_opal_tty_class, sc);
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if (console_sc == sc)
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tty_init_console(sc->tp, 0);
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sc->dev = dev;
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sc->irqrid = 0;
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sc->irqres = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irqrid,
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RF_ACTIVE | RF_SHAREABLE);
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if (sc->irqres != NULL) {
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bus_setup_intr(dev, sc->irqres, INTR_TYPE_TTY | INTR_MPSAFE,
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NULL, uart_opal_intr, sc, &sc->sc_icookie);
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} else {
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callout_init(&sc->callout, CALLOUT_MPSAFE);
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sc->polltime = hz / 20;
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if (sc->polltime < 1)
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sc->polltime = 1;
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callout_reset(&sc->callout, sc->polltime, uart_opal_intr, sc);
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}
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tty_makedev(sc->tp, NULL, "u%r", unit);
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return (0);
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}
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static void
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uart_opal_cninit(struct consdev *cp)
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{
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strcpy(cp->cn_name, "opalcons");
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}
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static void
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uart_opal_cnterm(struct consdev *cp)
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{
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}
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static int
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uart_opal_get(struct uart_opal_softc *sc, void *buffer, size_t bufsize)
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{
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int err;
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int hdr = 0;
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if (sc->protocol == OPAL_RAW) {
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uint64_t len = htobe64(bufsize);
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uint64_t olen = (uint64_t)&len;
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uint64_t obuf = (uint64_t)buffer;
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if (pmap_bootstrapped) {
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olen = vtophys(&len);
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obuf = vtophys(buffer);
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}
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err = opal_call(OPAL_CONSOLE_READ, sc->vtermid, olen, obuf);
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if (err != OPAL_SUCCESS)
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return (-1);
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bufsize = be64toh(len);
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} else {
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uart_lock(&sc->sc_mtx);
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if (sc->inbuflen == 0) {
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err = opal_call(OPAL_CONSOLE_READ, sc->vtermid,
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&sc->inbuflen, sc->opal_inbuf);
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if (err != OPAL_SUCCESS) {
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uart_unlock(&sc->sc_mtx);
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return (-1);
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}
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hdr = 1;
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sc->inbuflen = be64toh(sc->inbuflen);
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}
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if (sc->inbuflen == 0) {
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uart_unlock(&sc->sc_mtx);
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return (0);
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}
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if (bufsize > sc->inbuflen)
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bufsize = sc->inbuflen;
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if (hdr == 1) {
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sc->inbuflen = sc->inbuflen - 4;
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/* The HVSI protocol has a 4 byte header, skip it */
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memmove(&sc->opal_inbuf[0], &sc->opal_inbuf[4],
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sc->inbuflen);
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}
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memcpy(buffer, sc->opal_inbuf, bufsize);
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sc->inbuflen -= bufsize;
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if (sc->inbuflen > 0)
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memmove(&sc->opal_inbuf[0], &sc->opal_inbuf[bufsize],
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sc->inbuflen);
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uart_unlock(&sc->sc_mtx);
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}
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return (bufsize);
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}
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static int
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uart_opal_put(struct uart_opal_softc *sc, void *buffer, size_t bufsize)
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{
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uint16_t seqno;
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uint64_t len;
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char cbuf[16];
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int err;
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uint64_t olen = (uint64_t)&len;
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uint64_t obuf = (uint64_t)cbuf;
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if (sc->protocol == OPAL_RAW) {
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obuf = (uint64_t)buffer;
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len = bufsize;
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uart_opal_real_map_outbuffer(&obuf, &olen);
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*(uint64_t*)olen = htobe64(*(uint64_t*)olen);
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err = opal_call(OPAL_CONSOLE_WRITE, sc->vtermid, olen, obuf);
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*(uint64_t*)olen = be64toh(*(uint64_t*)olen);
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uart_opal_real_unmap_outbuffer(&len);
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} else {
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uart_lock(&sc->sc_mtx);
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if (bufsize > 12)
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bufsize = 12;
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seqno = sc->outseqno++;
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cbuf[0] = VS_DATA_PACKET_HEADER;
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cbuf[1] = 4 + bufsize; /* total length */
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cbuf[2] = (seqno >> 8) & 0xff;
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cbuf[3] = seqno & 0xff;
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memcpy(&cbuf[4], buffer, bufsize);
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len = 4 + bufsize;
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uart_opal_real_map_outbuffer(&obuf, &olen);
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*(uint64_t*)olen = htobe64(*(uint64_t*)olen);
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err = opal_call(OPAL_CONSOLE_WRITE, sc->vtermid, olen, obuf);
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*(uint64_t*)olen = be64toh(*(uint64_t*)olen);
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uart_opal_real_unmap_outbuffer(&len);
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uart_unlock(&sc->sc_mtx);
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len -= 4;
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}
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if (err == OPAL_SUCCESS)
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return (len);
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else if (err == OPAL_BUSY_EVENT)
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return(0);
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return (-1);
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}
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static int
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uart_opal_cngetc(struct consdev *cp)
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{
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return (uart_opal_getc(cp->cn_arg));
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}
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static int
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uart_opal_getc(struct uart_opal_softc *sc)
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{
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unsigned char c;
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int retval;
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retval = uart_opal_get(sc, &c, 1);
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if (retval != 1)
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return (-1);
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#if defined(KDB)
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kdb_alt_break(c, &sc->alt_break_state);
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#endif
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return (c);
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}
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static void
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uart_opal_cnputc(struct consdev *cp, int c)
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{
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unsigned char ch = c;
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int a;
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if (1) {
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/* Clear FIFO if needed. Must be repeated few times. */
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for (a = 0; a < 20; a++) {
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opal_call(OPAL_POLL_EVENTS, NULL);
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}
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}
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uart_opal_put(cp->cn_arg, &ch, 1);
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}
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static void
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uart_opal_cngrab(struct consdev *cp)
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{
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}
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static void
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uart_opal_cnungrab(struct consdev *cp)
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{
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}
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static void
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uart_opal_ttyoutwakeup(struct tty *tp)
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{
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struct uart_opal_softc *sc;
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char buffer[8];
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int len;
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int64_t buffer_space;
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sc = tty_softc(tp);
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while ((len = ttydisc_getc(tp, buffer, sizeof(buffer))) != 0) {
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int bytes_written = 0;
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while (bytes_written == 0) {
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buffer_space = uart_opal_console_write_buffer_space(sc->vtermid);
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if (buffer_space == -1)
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/* OPAL failure or invalid terminal */
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break;
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else if (buffer_space >= len)
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bytes_written = uart_opal_put(sc, buffer, len);
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if (bytes_written == 0)
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/* OPAL must be busy, poll and retry */
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opal_call(OPAL_POLL_EVENTS, NULL);
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else if (bytes_written == -1)
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/* OPAL failure or invalid terminal */
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break;
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}
|
|
}
|
|
}
|
|
|
|
static void
|
|
uart_opal_intr(void *v)
|
|
{
|
|
struct uart_opal_softc *sc = v;
|
|
struct tty *tp = sc->tp;
|
|
int c;
|
|
|
|
tty_lock(tp);
|
|
while ((c = uart_opal_getc(sc)) > 0)
|
|
ttydisc_rint(tp, c, 0);
|
|
ttydisc_rint_done(tp);
|
|
tty_unlock(tp);
|
|
|
|
opal_call(OPAL_POLL_EVENTS, NULL);
|
|
|
|
if (sc->irqres == NULL)
|
|
callout_reset(&sc->callout, sc->polltime, uart_opal_intr, sc);
|
|
}
|
|
|
|
static int
|
|
opalcons_probe(device_t dev)
|
|
{
|
|
const char *name;
|
|
|
|
name = ofw_bus_get_name(dev);
|
|
if (name == NULL || strcmp(name, "consoles") != 0)
|
|
return (ENXIO);
|
|
|
|
device_set_desc(dev, "OPAL Consoles");
|
|
return (BUS_PROBE_SPECIFIC);
|
|
}
|
|
|
|
static int
|
|
opalcons_attach(device_t dev)
|
|
{
|
|
phandle_t child;
|
|
device_t cdev;
|
|
struct ofw_bus_devinfo *dinfo;
|
|
|
|
for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
|
|
child = OF_peer(child)) {
|
|
dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
|
|
if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
|
|
free(dinfo, M_DEVBUF);
|
|
continue;
|
|
}
|
|
cdev = device_add_child(dev, NULL, -1);
|
|
if (cdev == NULL) {
|
|
device_printf(dev, "<%s>: device_add_child failed\n",
|
|
dinfo->obd_name);
|
|
ofw_bus_gen_destroy_devinfo(dinfo);
|
|
free(dinfo, M_DEVBUF);
|
|
continue;
|
|
}
|
|
device_set_ivars(cdev, dinfo);
|
|
}
|
|
|
|
return (bus_generic_attach(dev));
|
|
}
|
|
|
|
static const struct ofw_bus_devinfo *
|
|
opalcons_get_devinfo(device_t dev, device_t child)
|
|
{
|
|
return (device_get_ivars(child));
|
|
}
|
|
|
|
static device_method_t opalcons_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, opalcons_probe),
|
|
DEVMETHOD(device_attach, opalcons_attach),
|
|
|
|
/* ofw_bus interface */
|
|
DEVMETHOD(ofw_bus_get_devinfo, opalcons_get_devinfo),
|
|
DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
|
|
DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
|
|
DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
|
|
DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
|
|
DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static driver_t opalcons_driver = {
|
|
"opalcons",
|
|
opalcons_methods,
|
|
0
|
|
};
|
|
|
|
DRIVER_MODULE(opalcons, opal, opalcons_driver, 0, 0);
|