usr/src/lib/fm/topo/modules/common/disk/disk.c

   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 (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  23  */
  24 /*
  25  * Copyright (c) 2013, Joyent, Inc.  All rights reserved.
  26  */
  27
  28 #include <strings.h>
  29 #include <devid.h>
  30 #include <pthread.h>
  31 #include <inttypes.h>
  32 #include <sys/dkio.h>
  33 #include <sys/scsi/scsi_types.h>
  34 #include <fm/topo_mod.h>
  35 #include <fm/topo_list.h>
  36 #include <fm/libdiskstatus.h>
  37 #include <sys/fm/protocol.h>
  38 #include "disk.h"
  39 #include "disk_drivers.h"
  40
  41 static int disk_enum(topo_mod_t *, tnode_t *, const char *,
  42         topo_instance_t, topo_instance_t, void *, void *);
  43
  44 static const topo_modops_t disk_ops =
  45         { disk_enum, NULL };
  46
  47 static const topo_modinfo_t disk_info =
  48         {DISK, FM_FMRI_SCHEME_HC, DISK_VERSION, &disk_ops};
  49
  50 static int
  51 disk_declare_driver(topo_mod_t *mod, tnode_t *baynode, topo_list_t *dlistp,
  52     char *driver)
  53 {
  54         int err;
  55
  56         if (strcmp("mpt_sas", driver) == 0) {
  57                 char *sas_address = NULL;
  58                 tnode_t *child = NULL;
  59
  60                 if ((err = disk_mptsas_find_disk(mod, baynode,
  61                     &sas_address)) != 0)
  62                         return (err);
  63
  64                 err = disk_declare_addr(mod, baynode, dlistp,
  65                     sas_address, &child);
  66                 topo_mod_strfree(mod, sas_address);
  67
  68                 return (err);
  69         }
  70
  71         topo_mod_dprintf(mod, "unknown disk driver '%s'\n", driver);
  72         return (-1);
  73 }
  74
  75 /*ARGSUSED*/
  76 static int
  77 disk_enum(topo_mod_t *mod, tnode_t *baynode,
  78     const char *name, topo_instance_t min, topo_instance_t max,
  79     void *arg, void *notused)
  80 {
  81         char            *device, *driver;
  82         int             err;
  83         nvlist_t        *fmri;
  84         topo_list_t     *dlistp = topo_mod_getspecific(mod);
  85
  86         if (strcmp(name, DISK) != 0) {
  87                 topo_mod_dprintf(mod, "disk_enum: "
  88                     "only know how to enumerate %s components.\n", DISK);
  89                 return (-1);
  90         }
  91
  92         /* set the parent fru */
  93         if (topo_node_resource(baynode, &fmri, &err) != 0) {
  94                 topo_mod_dprintf(mod, "disk_enum: "
  95                     "topo_node_resource error %s\n", topo_strerror(err));
  96                 return (-1);
  97         }
  98         if (topo_node_fru_set(baynode, fmri, 0, &err) != 0) {
  99                 topo_mod_dprintf(mod, "disk_enum: "
 100                     "topo_node_fru error %s\n", topo_strerror(err));
 101                 nvlist_free(fmri);
 102                 return (-1);
 103         }
 104         nvlist_free(fmri);
 105
 106         /*
 107          * For internal storage, first check to see if we need to
 108          * request more detail from an HBA driver.
 109          */
 110         if (topo_prop_get_string(baynode, TOPO_PGROUP_BINDING,
 111             TOPO_BINDING_DRIVER, &driver, &err) == 0) {
 112                 err = disk_declare_driver(mod, baynode, dlistp, driver);
 113
 114                 topo_mod_strfree(mod, driver);
 115                 return (err);
 116         } else if (err != ETOPO_PROP_NOENT) {
 117                 topo_mod_dprintf(mod, "disk_enum: "
 118                     "binding error %s\n", topo_strerror(err));
 119                 return (-1);
 120         }
 121
 122         /*
 123          * For internal storage, get the path to the occupant from the
 124          * binding group of the bay node
 125          */
 126         if (topo_prop_get_string(baynode, TOPO_PGROUP_BINDING,
 127             TOPO_BINDING_OCCUPANT, &device, &err) != 0) {
 128                 topo_mod_dprintf(mod, "disk_enum: "
 129                     "binding error %s\n", topo_strerror(err));
 130                 return (-1);
 131         }
 132
 133
 134         /* locate and topo enumerate the disk with that path */
 135         err = disk_declare_path(mod, baynode, dlistp, device);
 136
 137         topo_mod_strfree(mod, device);
 138         return (err);
 139 }
 140
 141 /*ARGSUSED*/
 142 int
 143 _topo_init(topo_mod_t *mod, topo_version_t version)
 144 {
 145         topo_list_t *dlistp;
 146
 147         /*
 148          * Turn on module debugging output
 149          */
 150         if (getenv("TOPODISKDEBUG") != NULL)
 151                 topo_mod_setdebug(mod);
 152         topo_mod_dprintf(mod, "_topo_init: "
 153             "initializing %s enumerator\n", DISK);
 154
 155         if (topo_mod_register(mod, &disk_info, TOPO_VERSION) != 0) {
 156                 topo_mod_dprintf(mod, "_topo_init: "
 157                     "%s registration failed: %s\n", DISK, topo_mod_errmsg(mod));
 158                 return (-1);            /* mod errno already set */
 159         }
 160
 161         if ((dlistp = topo_mod_zalloc(mod, sizeof (topo_list_t))) == NULL) {
 162                 topo_mod_dprintf(mod, "_topo_inti: failed to allocate "
 163                     "disk list");
 164                 return (-1);
 165         }
 166
 167         if (dev_list_gather(mod, dlistp) != 0) {
 168                 topo_mod_unregister(mod);
 169                 topo_mod_free(mod, dlistp, sizeof (topo_list_t));
 170                 topo_mod_dprintf(mod, "_topo_init: "
 171                     "failed to locate disks");
 172                 return (-1);
 173         }
 174
 175         topo_mod_dprintf(mod, "_topo_init: "
 176             "%s enumerator initialized\n", DISK);
 177
 178         topo_mod_setspecific(mod, dlistp);
 179
 180         return (0);
 181 }
 182
 183 void
 184 _topo_fini(topo_mod_t *mod)
 185 {
 186         topo_list_t *dlistp = topo_mod_getspecific(mod);
 187         dev_list_free(mod, dlistp);
 188         topo_mod_free(mod, dlistp, sizeof (topo_list_t));
 189         topo_mod_unregister(mod);
 190         topo_mod_dprintf(mod, "_topo_fini: "
 191             "%s enumerator uninitialized\n", DISK);
 192 }