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 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <errno.h> 29 #include <fcntl.h> 30 #include <libipmi.h> 31 #include <stddef.h> 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <stropts.h> 36 #include <unistd.h> 37 38 #include <sys/bmc_intf.h> 39 40 #include "ipmi_impl.h" 41 42 /* 43 * IPMI transport for /dev/bmc 44 */ 45 46 typedef struct ipmi_bmc { 47 ipmi_handle_t *ib_ihp; /* ipmi handle */ 48 int ib_fd; /* /dev/bmc filedescriptor */ 49 uint32_t ib_msgseq; /* message sequence number */ 50 bmc_msg_t *ib_msg; /* message buffer */ 51 size_t ib_msglen; /* size of message buffer */ 52 } ipmi_bmc_t; 53 54 #define BMC_DEV "/dev/bmc" 55 56 static void 57 ipmi_bmc_close(void *data) 58 { 59 ipmi_bmc_t *ibp = data; 60 61 ipmi_free(ibp->ib_ihp, ibp->ib_msg); 62 63 (void) close(ibp->ib_fd); 64 65 ipmi_free(ibp->ib_ihp, ibp); 66 } 67 68 static void * 69 ipmi_bmc_open(ipmi_handle_t *ihp) 70 { 71 ipmi_bmc_t *ibp; 72 73 if ((ibp = ipmi_zalloc(ihp, sizeof (ipmi_bmc_t))) == NULL) 74 return (NULL); 75 ibp->ib_ihp = ihp; 76 77 /* open /dev/bmc */ 78 if ((ibp->ib_fd = open(BMC_DEV, O_RDWR)) < 0) { 79 ipmi_free(ihp, ibp); 80 (void) ipmi_set_error(ihp, EIPMI_BMC_OPEN_FAILED, "%s", 81 strerror(errno)); 82 return (NULL); 83 } 84 85 if ((ibp->ib_msg = (bmc_msg_t *)ipmi_zalloc(ihp, BUFSIZ)) == NULL) { 86 ipmi_bmc_close(ibp); 87 return (NULL); 88 } 89 ibp->ib_msglen = BUFSIZ; 90 91 return (ibp); 92 } 93 94 static int 95 ipmi_bmc_send(void *data, ipmi_cmd_t *cmd, ipmi_cmd_t *response, 96 int *completion) 97 { 98 ipmi_bmc_t *ibp = data; 99 struct strbuf sb; 100 int flags = 0; 101 size_t msgsz; 102 bmc_msg_t *msg; 103 bmc_req_t *bmcreq; 104 bmc_rsp_t *bmcrsp; 105 106 /* 107 * The length of the message structure is equal to the size of the 108 * bmc_req_t structure, PLUS any additional data space in excess of 109 * the data space already reserved in the data member + <n> for 110 * the rest of the members in the bmc_msg_t structure. 111 */ 112 msgsz = offsetof(bmc_msg_t, msg) + sizeof (bmc_req_t) + 113 ((cmd->ic_dlen > SEND_MAX_PAYLOAD_SIZE) ? 114 (cmd->ic_dlen - SEND_MAX_PAYLOAD_SIZE) : 0); 115 116 /* construct and send the message */ 117 if ((msg = ipmi_zalloc(ibp->ib_ihp, msgsz)) == NULL) 118 return (-1); 119 bmcreq = (bmc_req_t *)&msg->msg[0]; 120 121 msg->m_type = BMC_MSG_REQUEST; 122 msg->m_id = ibp->ib_msgseq++; 123 bmcreq->fn = cmd->ic_netfn; 124 bmcreq->lun = cmd->ic_lun; 125 bmcreq->cmd = cmd->ic_cmd; 126 bmcreq->datalength = cmd->ic_dlen; 127 (void) memcpy(bmcreq->data, cmd->ic_data, cmd->ic_dlen); 128 sb.len = msgsz; 129 sb.buf = (char *)msg; 130 131 if (putmsg(ibp->ib_fd, NULL, &sb, 0) < 0) { 132 ipmi_free(ibp->ib_ihp, msg); 133 (void) ipmi_set_error(ibp->ib_ihp, EIPMI_BMC_PUTMSG, "%s", 134 strerror(errno)); 135 return (-1); 136 } 137 138 ipmi_free(ibp->ib_ihp, msg); 139 140 /* get the response from the BMC */ 141 sb.buf = (char *)ibp->ib_msg; 142 sb.maxlen = ibp->ib_msglen; 143 144 if (getmsg(ibp->ib_fd, NULL, &sb, &flags) < 0) { 145 (void) ipmi_set_error(ibp->ib_ihp, EIPMI_BMC_GETMSG, "%s", 146 strerror(errno)); 147 return (-1); 148 } 149 150 switch (ibp->ib_msg->m_type) { 151 case BMC_MSG_RESPONSE: 152 bmcrsp = (bmc_rsp_t *)&ibp->ib_msg->msg[0]; 153 154 response->ic_netfn = bmcrsp->fn; 155 response->ic_lun = bmcrsp->lun; 156 response->ic_cmd = bmcrsp->cmd; 157 if (bmcrsp->ccode != 0) { 158 *completion = bmcrsp->ccode; 159 response->ic_dlen = 0; 160 response->ic_data = NULL; 161 } else { 162 *completion = 0; 163 response->ic_dlen = bmcrsp->datalength; 164 response->ic_data = bmcrsp->data; 165 } 166 break; 167 168 case BMC_MSG_ERROR: 169 (void) ipmi_set_error(ibp->ib_ihp, EIPMI_BMC_RESPONSE, "%s", 170 strerror(ibp->ib_msg->msg[0])); 171 return (-1); 172 173 default: 174 (void) ipmi_set_error(ibp->ib_ihp, EIPMI_BMC_RESPONSE, 175 "unknown BMC message type %d", ibp->ib_msg->m_type); 176 return (-1); 177 } 178 179 return (0); 180 } 181 182 ipmi_transport_t ipmi_transport_bmc = { 183 ipmi_bmc_open, 184 ipmi_bmc_close, 185 ipmi_bmc_send 186 }; 187