1 /* $OpenBSD: ipmi_opal.c,v 1.3 2022/04/06 18:59:27 naddy 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 }; 66 67 int 68 ipmi_opal_match(struct device *parent, void *match, void *aux) 69 { 70 struct fdt_attach_args *faa = aux; 71 72 return OF_is_compatible(faa->fa_node, "ibm,opal-ipmi"); 73 } 74 75 void 76 ipmi_opal_attach(struct device *parent, struct device *self, void *aux) 77 { 78 struct ipmi_opal_softc *sc = (struct ipmi_opal_softc *)self; 79 struct fdt_attach_args *faa = aux; 80 struct ipmi_attach_args iaa; 81 uint64_t size; 82 int64_t error; 83 84 sc->sc.sc_if = &opal_if; 85 sc->sc_id = OF_getpropint(faa->fa_node, "ibm,ipmi-interface-id", 0); 86 87 /* Clear IPMI message queue. */ 88 do { 89 size = sizeof(sc->sc.sc_buf); 90 error = opal_ipmi_recv(sc->sc_id, 91 opal_phys(sc->sc.sc_buf), opal_phys(&size)); 92 } while (error == OPAL_SUCCESS); 93 94 memset(&iaa, 0, sizeof(iaa)); 95 iaa.iaa_if_type = IPMI_IF_SSIF; 96 iaa.iaa_if_rev = 0x20; 97 iaa.iaa_if_irq = -1; 98 ipmi_attach_common(&sc->sc, &iaa); 99 } 100 101 #define RSSA_MASK 0xff 102 #define LUN_MASK 0x3 103 #define NETFN_LUN(nf,ln) (((nf) << 2) | ((ln) & LUN_MASK)) 104 105 void 106 ipmi_opal_buildmsg(struct ipmi_cmd *c) 107 { 108 struct ipmi_softc *sc = c->c_sc; 109 struct opal_ipmi_msg *msg = (struct opal_ipmi_msg *)sc->sc_buf; 110 111 msg->version = OPAL_IPMI_MSG_FORMAT_VERSION_1; 112 msg->netfn = NETFN_LUN(c->c_netfn, c->c_rslun); 113 msg->cmd = c->c_cmd; 114 if (c->c_txlen && c->c_data) 115 memcpy(msg->data, c->c_data, c->c_txlen); 116 } 117 118 int 119 ipmi_opal_sendmsg(struct ipmi_cmd *c) 120 { 121 struct ipmi_opal_softc *sc = (struct ipmi_opal_softc *)c->c_sc; 122 int64_t error; 123 124 error = opal_ipmi_send(sc->sc_id, 125 opal_phys(sc->sc.sc_buf), c->c_txlen); 126 127 return (error == OPAL_SUCCESS ? 0 : -1); 128 } 129 130 int 131 ipmi_opal_recvmsg(struct ipmi_cmd *c) 132 { 133 struct ipmi_opal_softc *sc = (struct ipmi_opal_softc *)c->c_sc; 134 struct opal_ipmi_msg *msg = (struct opal_ipmi_msg *)sc->sc.sc_buf; 135 uint64_t size = sizeof(sc->sc.sc_buf); 136 int64_t error; 137 int timo; 138 139 msg->version = OPAL_IPMI_MSG_FORMAT_VERSION_1; 140 for (timo = 1000; timo > 0; timo--) { 141 error = opal_ipmi_recv(sc->sc_id, 142 opal_phys(sc->sc.sc_buf), opal_phys(&size)); 143 if (error != OPAL_EMPTY) 144 break; 145 146 tsleep_nsec(sc, PWAIT, "ipmi", MSEC_TO_NSEC(1)); 147 opal_poll_events(NULL); 148 } 149 150 if (error == OPAL_SUCCESS) { 151 if (msg->version != OPAL_IPMI_MSG_FORMAT_VERSION_1) 152 return -1; 153 154 sc->sc.sc_buf[IPMI_MSG_NFLN] = msg->netfn; 155 sc->sc.sc_buf[IPMI_MSG_CMD] = msg->cmd; 156 sc->sc.sc_buf[IPMI_MSG_CCODE] = msg->data[0]; 157 c->c_rxlen = MIN(size, c->c_maxrxlen); 158 } 159 160 return (error == OPAL_SUCCESS ? 0 : -1); 161 } 162 163 int 164 ipmi_opal_reset(struct ipmi_softc *sc) 165 { 166 return -1; 167 } 168 169 int 170 ipmi_opal_probe(struct ipmi_softc *sc) 171 { 172 return 0; 173 } 174