1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <errno.h> 27 #include <fcntl.h> 28 #include <libipmi.h> 29 #include <stddef.h> 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <stropts.h> 34 #include <unistd.h> 35 36 #include <sys/bmc_intf.h> 37 38 #include "ipmi_impl.h" 39 40 /* 41 * IPMI transport for /dev/bmc 42 */ 43 44 typedef struct ipmi_bmc { 45 ipmi_handle_t *ib_ihp; /* ipmi handle */ 46 int ib_fd; /* /dev/bmc filedescriptor */ 47 uint32_t ib_msgseq; /* message sequence number */ 48 bmc_msg_t *ib_msg; /* message buffer */ 49 size_t ib_msglen; /* size of message buffer */ 50 } ipmi_bmc_t; 51 52 #define BMC_DEV "/dev/bmc" 53 54 static void 55 ipmi_bmc_close(void *data) 56 { 57 ipmi_bmc_t *ibp = data; 58 59 ipmi_free(ibp->ib_ihp, ibp->ib_msg); 60 61 (void) close(ibp->ib_fd); 62 63 ipmi_free(ibp->ib_ihp, ibp); 64 } 65 66 /*ARGSUSED*/ 67 static void * 68 ipmi_bmc_open(ipmi_handle_t *ihp, nvlist_t *params) 69 { 70 ipmi_bmc_t *ibp; 71 72 if ((ibp = ipmi_zalloc(ihp, sizeof (ipmi_bmc_t))) == NULL) 73 return (NULL); 74 ibp->ib_ihp = ihp; 75 76 /* open /dev/bmc */ 77 if ((ibp->ib_fd = open(BMC_DEV, O_RDWR)) < 0) { 78 ipmi_free(ihp, ibp); 79 (void) ipmi_set_error(ihp, EIPMI_BMC_OPEN_FAILED, "%s", 80 strerror(errno)); 81 return (NULL); 82 } 83 84 if ((ibp->ib_msg = (bmc_msg_t *)ipmi_zalloc(ihp, BUFSIZ)) == NULL) { 85 ipmi_bmc_close(ibp); 86 return (NULL); 87 } 88 ibp->ib_msglen = BUFSIZ; 89 90 return (ibp); 91 } 92 93 static int 94 ipmi_bmc_send(void *data, ipmi_cmd_t *cmd, ipmi_cmd_t *response, 95 int *completion) 96 { 97 ipmi_bmc_t *ibp = data; 98 struct strbuf sb; 99 int flags = 0; 100 size_t msgsz; 101 bmc_msg_t *msg; 102 bmc_req_t *bmcreq; 103 bmc_rsp_t *bmcrsp; 104 105 /* 106 * The length of the message structure is equal to the size of the 107 * bmc_req_t structure, PLUS any additional data space in excess of 108 * the data space already reserved in the data member + <n> for 109 * the rest of the members in the bmc_msg_t structure. 110 */ 111 msgsz = offsetof(bmc_msg_t, msg) + sizeof (bmc_req_t) + 112 ((cmd->ic_dlen > SEND_MAX_PAYLOAD_SIZE) ? 113 (cmd->ic_dlen - SEND_MAX_PAYLOAD_SIZE) : 0); 114 115 /* construct and send the message */ 116 if ((msg = ipmi_zalloc(ibp->ib_ihp, msgsz)) == NULL) 117 return (-1); 118 bmcreq = (bmc_req_t *)&msg->msg[0]; 119 120 msg->m_type = BMC_MSG_REQUEST; 121 msg->m_id = ibp->ib_msgseq++; 122 bmcreq->fn = cmd->ic_netfn; 123 bmcreq->lun = cmd->ic_lun; 124 bmcreq->cmd = cmd->ic_cmd; 125 bmcreq->datalength = cmd->ic_dlen; 126 (void) memcpy(bmcreq->data, cmd->ic_data, cmd->ic_dlen); 127 sb.len = msgsz; 128 sb.buf = (char *)msg; 129 130 if (putmsg(ibp->ib_fd, NULL, &sb, 0) < 0) { 131 ipmi_free(ibp->ib_ihp, msg); 132 (void) ipmi_set_error(ibp->ib_ihp, EIPMI_BMC_PUTMSG, "%s", 133 strerror(errno)); 134 return (-1); 135 } 136 137 ipmi_free(ibp->ib_ihp, msg); 138 139 /* get the response from the BMC */ 140 sb.buf = (char *)ibp->ib_msg; 141 sb.maxlen = ibp->ib_msglen; 142 143 if (getmsg(ibp->ib_fd, NULL, &sb, &flags) < 0) { 144 (void) ipmi_set_error(ibp->ib_ihp, EIPMI_BMC_GETMSG, "%s", 145 strerror(errno)); 146 return (-1); 147 } 148 149 switch (ibp->ib_msg->m_type) { 150 case BMC_MSG_RESPONSE: 151 bmcrsp = (bmc_rsp_t *)&ibp->ib_msg->msg[0]; 152 153 response->ic_netfn = bmcrsp->fn; 154 response->ic_lun = bmcrsp->lun; 155 response->ic_cmd = bmcrsp->cmd; 156 if (bmcrsp->ccode != 0) { 157 *completion = bmcrsp->ccode; 158 response->ic_dlen = 0; 159 response->ic_data = NULL; 160 } else { 161 *completion = 0; 162 response->ic_dlen = bmcrsp->datalength; 163 response->ic_data = bmcrsp->data; 164 } 165 break; 166 167 case BMC_MSG_ERROR: 168 (void) ipmi_set_error(ibp->ib_ihp, EIPMI_BMC_RESPONSE, "%s", 169 strerror(ibp->ib_msg->msg[0])); 170 return (-1); 171 172 default: 173 (void) ipmi_set_error(ibp->ib_ihp, EIPMI_BMC_RESPONSE, 174 "unknown BMC message type %d", ibp->ib_msg->m_type); 175 return (-1); 176 } 177 178 return (0); 179 } 180 181 ipmi_transport_t ipmi_transport_bmc = { 182 ipmi_bmc_open, 183 ipmi_bmc_close, 184 ipmi_bmc_send 185 }; 186