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/* $OpenBSD: ipmi_opal.c,v 1.1 2021/01/23 12:10:08 kettenis Exp $ */
/*
* Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <machine/fdt.h>
#include <machine/opal.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/fdt.h>
#include <dev/ipmivar.h>
struct ipmi_opal_softc {
struct ipmi_softc sc;
int sc_id;
};
void ipmi_opal_buildmsg(struct ipmi_cmd *);
int ipmi_opal_sendmsg(struct ipmi_cmd *);
int ipmi_opal_recvmsg(struct ipmi_cmd *);
int ipmi_opal_reset(struct ipmi_softc *);
int ipmi_opal_probe(struct ipmi_softc *);
#define IPMI_OPALMSG_VERSION 0
#define IPMI_OPALMSG_NFLN 1
#define IPMI_OPALMSG_CMD 2
#define IPMI_OPALMSG_CCODE 3
#define IPMI_OPALMSG_DATASND 3
#define IPMI_OPALMSG_DATARCV 4
struct ipmi_if opal_if = {
"OPAL",
0,
ipmi_opal_buildmsg,
ipmi_opal_sendmsg,
ipmi_opal_recvmsg,
ipmi_opal_reset,
ipmi_opal_probe,
IPMI_OPALMSG_DATASND,
IPMI_OPALMSG_DATARCV
};
int ipmi_opal_match(struct device *, void *, void *);
void ipmi_opal_attach(struct device *, struct device *, void *);
struct cfattach ipmi_opal_ca = {
sizeof (struct ipmi_opal_softc), ipmi_opal_match, ipmi_opal_attach
};
int
ipmi_opal_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "ibm,opal-ipmi");
}
void
ipmi_opal_attach(struct device *parent, struct device *self, void *aux)
{
struct ipmi_opal_softc *sc = (struct ipmi_opal_softc *)self;
struct fdt_attach_args *faa = aux;
struct ipmi_attach_args iaa;
uint64_t size;
int64_t error;
sc->sc.sc_if = &opal_if;
sc->sc_id = OF_getpropint(faa->fa_node, "ibm,ipmi-interface-id", 0);
/* Clear IPMI message queue. */
do {
size = sizeof(sc->sc.sc_buf);
error = opal_ipmi_recv(sc->sc_id,
opal_phys(sc->sc.sc_buf), opal_phys(&size));
} while (error == OPAL_SUCCESS);
memset(&iaa, 0, sizeof(iaa));
iaa.iaa_if_type = IPMI_IF_SSIF;
iaa.iaa_if_rev = 0x20;
iaa.iaa_if_irq = -1;
ipmi_attach_common(&sc->sc, &iaa);
}
#define RSSA_MASK 0xff
#define LUN_MASK 0x3
#define NETFN_LUN(nf,ln) (((nf) << 2) | ((ln) & LUN_MASK))
void
ipmi_opal_buildmsg(struct ipmi_cmd *c)
{
struct ipmi_softc *sc = c->c_sc;
struct opal_ipmi_msg *msg = (struct opal_ipmi_msg *)sc->sc_buf;
msg->version = OPAL_IPMI_MSG_FORMAT_VERSION_1;
msg->netfn = NETFN_LUN(c->c_netfn, c->c_rslun);;
msg->cmd = c->c_cmd;
if (c->c_txlen && c->c_data)
memcpy(msg->data, c->c_data, c->c_txlen);
}
int
ipmi_opal_sendmsg(struct ipmi_cmd *c)
{
struct ipmi_opal_softc *sc = (struct ipmi_opal_softc *)c->c_sc;
int64_t error;
error = opal_ipmi_send(sc->sc_id,
opal_phys(sc->sc.sc_buf), c->c_txlen);
return (error == OPAL_SUCCESS ? 0 : -1);
}
int
ipmi_opal_recvmsg(struct ipmi_cmd *c)
{
struct ipmi_opal_softc *sc = (struct ipmi_opal_softc *)c->c_sc;
struct opal_ipmi_msg *msg = (struct opal_ipmi_msg *)sc->sc.sc_buf;
uint64_t size = sizeof(sc->sc.sc_buf);
int64_t error;
int timo;
msg->version = OPAL_IPMI_MSG_FORMAT_VERSION_1;
for (timo = 1000; timo > 0; timo--) {
error = opal_ipmi_recv(sc->sc_id,
opal_phys(sc->sc.sc_buf), opal_phys(&size));
if (error != OPAL_EMPTY)
break;
tsleep_nsec(sc, PWAIT, "ipmi", MSEC_TO_NSEC(1));
opal_poll_events(NULL);
}
if (error == OPAL_SUCCESS) {
if (msg->version != OPAL_IPMI_MSG_FORMAT_VERSION_1)
return -1;
sc->sc.sc_buf[IPMI_MSG_NFLN] = msg->netfn;
sc->sc.sc_buf[IPMI_MSG_CMD] = msg->cmd;
sc->sc.sc_buf[IPMI_MSG_CCODE] = msg->data[0];
c->c_rxlen = MIN(size, c->c_maxrxlen);
}
return (error == OPAL_SUCCESS ? 0 : -1);
}
int
ipmi_opal_reset(struct ipmi_softc *sc)
{
return -1;
}
int
ipmi_opal_probe(struct ipmi_softc *sc)
{
return 0;
}
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