1 /* $OpenBSD: ipmi_opal.c,v 1.4 2024/10/09 00:38:26 jsg Exp $ */ 2 /* 3 * Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <sys/param.h> 19 #include <sys/device.h> 20 #include <sys/systm.h> 21 22 #include <machine/fdt.h> 23 #include <machine/opal.h> 24 25 #include <dev/ofw/openfirm.h> 26 #include <dev/ofw/fdt.h> 27 28 #include <dev/ipmivar.h> 29 30 struct ipmi_opal_softc { 31 struct ipmi_softc sc; 32 int sc_id; 33 }; 34 35 void ipmi_opal_buildmsg(struct ipmi_cmd *); 36 int ipmi_opal_sendmsg(struct ipmi_cmd *); 37 int ipmi_opal_recvmsg(struct ipmi_cmd *); 38 int ipmi_opal_reset(struct ipmi_softc *); 39 int ipmi_opal_probe(struct ipmi_softc *); 40 41 #define IPMI_OPALMSG_VERSION 0 42 #define IPMI_OPALMSG_NFLN 1 43 #define IPMI_OPALMSG_CMD 2 44 #define IPMI_OPALMSG_CCODE 3 45 #define IPMI_OPALMSG_DATASND 3 46 #define IPMI_OPALMSG_DATARCV 4 47 48 struct ipmi_if opal_if = { 49 "OPAL", 50 0, 51 ipmi_opal_buildmsg, 52 ipmi_opal_sendmsg, 53 ipmi_opal_recvmsg, 54 ipmi_opal_reset, 55 ipmi_opal_probe, 56 IPMI_OPALMSG_DATASND, 57 IPMI_OPALMSG_DATARCV 58 }; 59 60 int ipmi_opal_match(struct device *, void *, void *); 61 void ipmi_opal_attach(struct device *, struct device *, void *); 62 63 const struct cfattach ipmi_opal_ca = { 64 sizeof (struct ipmi_opal_softc), ipmi_opal_match, ipmi_opal_attach, 65 NULL, ipmi_activate 66 }; 67 68 int 69 ipmi_opal_match(struct device *parent, void *match, void *aux) 70 { 71 struct fdt_attach_args *faa = aux; 72 73 return OF_is_compatible(faa->fa_node, "ibm,opal-ipmi"); 74 } 75 76 void 77 ipmi_opal_attach(struct device *parent, struct device *self, void *aux) 78 { 79 struct ipmi_opal_softc *sc = (struct ipmi_opal_softc *)self; 80 struct fdt_attach_args *faa = aux; 81 struct ipmi_attach_args iaa; 82 uint64_t size; 83 int64_t error; 84 85 sc->sc.sc_if = &opal_if; 86 sc->sc_id = OF_getpropint(faa->fa_node, "ibm,ipmi-interface-id", 0); 87 88 /* Clear IPMI message queue. */ 89 do { 90 size = sizeof(sc->sc.sc_buf); 91 error = opal_ipmi_recv(sc->sc_id, 92 opal_phys(sc->sc.sc_buf), opal_phys(&size)); 93 } while (error == OPAL_SUCCESS); 94 95 memset(&iaa, 0, sizeof(iaa)); 96 iaa.iaa_if_type = IPMI_IF_SSIF; 97 iaa.iaa_if_rev = 0x20; 98 iaa.iaa_if_irq = -1; 99 ipmi_attach_common(&sc->sc, &iaa); 100 } 101 102 #define RSSA_MASK 0xff 103 #define LUN_MASK 0x3 104 #define NETFN_LUN(nf,ln) (((nf) << 2) | ((ln) & LUN_MASK)) 105 106 void 107 ipmi_opal_buildmsg(struct ipmi_cmd *c) 108 { 109 struct ipmi_softc *sc = c->c_sc; 110 struct opal_ipmi_msg *msg = (struct opal_ipmi_msg *)sc->sc_buf; 111 112 msg->version = OPAL_IPMI_MSG_FORMAT_VERSION_1; 113 msg->netfn = NETFN_LUN(c->c_netfn, c->c_rslun); 114 msg->cmd = c->c_cmd; 115 if (c->c_txlen && c->c_data) 116 memcpy(msg->data, c->c_data, c->c_txlen); 117 } 118 119 int 120 ipmi_opal_sendmsg(struct ipmi_cmd *c) 121 { 122 struct ipmi_opal_softc *sc = (struct ipmi_opal_softc *)c->c_sc; 123 int64_t error; 124 125 error = opal_ipmi_send(sc->sc_id, 126 opal_phys(sc->sc.sc_buf), c->c_txlen); 127 128 return (error == OPAL_SUCCESS ? 0 : -1); 129 } 130 131 int 132 ipmi_opal_recvmsg(struct ipmi_cmd *c) 133 { 134 struct ipmi_opal_softc *sc = (struct ipmi_opal_softc *)c->c_sc; 135 struct opal_ipmi_msg *msg = (struct opal_ipmi_msg *)sc->sc.sc_buf; 136 uint64_t size = sizeof(sc->sc.sc_buf); 137 int64_t error; 138 int timo; 139 140 msg->version = OPAL_IPMI_MSG_FORMAT_VERSION_1; 141 for (timo = 1000; timo > 0; timo--) { 142 error = opal_ipmi_recv(sc->sc_id, 143 opal_phys(sc->sc.sc_buf), opal_phys(&size)); 144 if (error != OPAL_EMPTY) 145 break; 146 147 tsleep_nsec(sc, PWAIT, "ipmi", MSEC_TO_NSEC(1)); 148 opal_poll_events(NULL); 149 } 150 151 if (error == OPAL_SUCCESS) { 152 if (msg->version != OPAL_IPMI_MSG_FORMAT_VERSION_1) 153 return -1; 154 155 sc->sc.sc_buf[IPMI_MSG_NFLN] = msg->netfn; 156 sc->sc.sc_buf[IPMI_MSG_CMD] = msg->cmd; 157 sc->sc.sc_buf[IPMI_MSG_CCODE] = msg->data[0]; 158 c->c_rxlen = MIN(size, c->c_maxrxlen); 159 } 160 161 return (error == OPAL_SUCCESS ? 0 : -1); 162 } 163 164 int 165 ipmi_opal_reset(struct ipmi_softc *sc) 166 { 167 return -1; 168 } 169 170 int 171 ipmi_opal_probe(struct ipmi_softc *sc) 172 { 173 return 0; 174 } 175