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
ipmi_bmc_close(void * data)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 *
ipmi_bmc_open(ipmi_handle_t * ihp,nvlist_t * params)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
ipmi_bmc_send(void * data,ipmi_cmd_t * cmd,ipmi_cmd_t * response,int * completion)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