usr/src/cmd/fm/modules/sun4v/generic-mem/gmem_state.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 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*
  27  * Case management and saved state restoration
  28  */
  29
  30 #include <gmem_state.h>
  31 #include <gmem_mem.h>
  32 #include <gmem_page.h>
  33 #include <gmem_dimm.h>
  34 #include <gmem.h>
  35
  36 #include <string.h>
  37 #include <fm/fmd_api.h>
  38
  39 /* Must be in sync with gmem_ptrsubtype_t */
  40 static gmem_case_closer_f *const gmem_case_closers[] = {
  41         NULL,
  42         gmem_dimm_close,                /* GMEM_PTR_DIMM_CASE */
  43         gmem_page_close,                /* GMEM_PTR_PAGE_CASE */
  44 };
  45
  46 fmd_case_t *
  47 gmem_case_create(fmd_hdl_t *hdl, gmem_header_t *hdr,
  48     gmem_ptrsubtype_t ptrsubtype, const char **uuidp)
  49 {
  50         gmem_case_ptr_t ptr;
  51         gmem_case_closer_t *cl;
  52         fmd_case_t *cp;
  53
  54         cl = fmd_hdl_alloc(hdl, sizeof (gmem_case_closer_t), FMD_SLEEP);
  55         cl->cl_func = gmem_case_closers[ptrsubtype];
  56         cl->cl_arg = hdr;
  57
  58         cp = fmd_case_open(hdl, cl);
  59
  60         ptr.ptr_type = hdr->hdr_nodetype;
  61         ptr.ptr_subtype = ptrsubtype;
  62         (void) strcpy(ptr.ptr_name, hdr->hdr_bufname);
  63
  64         *uuidp = fmd_case_uuid(hdl, cp);
  65         fmd_buf_write(hdl, cp, *uuidp, &ptr, sizeof (gmem_case_ptr_t));
  66
  67         return (cp);
  68 }
  69
  70 void
  71 gmem_case_redirect(fmd_hdl_t *hdl, fmd_case_t *cp, gmem_ptrsubtype_t newsubtype)
  72 {
  73         const char *uuid = fmd_case_uuid(hdl, cp);
  74         gmem_case_ptr_t ptr;
  75
  76         fmd_buf_read(hdl, cp, uuid, &ptr, sizeof (gmem_case_ptr_t));
  77         fmd_hdl_debug(hdl, "redirecting case %s from %d to %d\n", uuid,
  78             ptr.ptr_subtype, newsubtype);
  79         ptr.ptr_subtype = newsubtype;
  80         fmd_buf_write(hdl, cp, uuid, &ptr, sizeof (gmem_case_ptr_t));
  81 }
  82
  83 void
  84 gmem_case_fini(fmd_hdl_t *hdl, fmd_case_t *cp, int close)
  85 {
  86         const char *uuid = fmd_case_uuid(hdl, cp);
  87         gmem_case_closer_t *cl = fmd_case_getspecific(hdl, cp);
  88
  89         if (close) {
  90                 fmd_hdl_debug(hdl, "closing case %s\n", uuid);
  91
  92                 if (fmd_serd_exists(hdl, uuid))
  93                         fmd_serd_destroy(hdl, uuid);
  94
  95                 if (fmd_buf_size(hdl, cp, uuid) != 0)
  96                         fmd_buf_destroy(hdl, cp, uuid);
  97
  98                 fmd_case_setspecific(hdl, cp, NULL);
  99                 fmd_case_close(hdl, cp);
 100         }
 101
 102         if (cl != NULL)
 103                 fmd_hdl_free(hdl, cl, sizeof (gmem_case_closer_t));
 104 }
 105
 106 /* Must be in sync with gmem_nodetype_t */
 107 static gmem_case_restorer_f *const gmem_case_restorers[] = {
 108         NULL,
 109         gmem_dimm_restore,      /* CMD_NT_DIMM */
 110         gmem_page_restore,      /* CMD_NT_PAGE */
 111 };
 112
 113 int
 114 gmem_state_restore(fmd_hdl_t *hdl)
 115 {
 116         fmd_case_t *cp = NULL;
 117
 118         while ((cp = fmd_case_next(hdl, cp)) != NULL) {
 119                 const char *uuid = fmd_case_uuid(hdl, cp);
 120                 gmem_case_closer_t *cl;
 121                 gmem_case_ptr_t ptr;
 122                 void *thing;
 123                 size_t sz;
 124
 125                 if ((sz = fmd_buf_size(hdl, cp, uuid)) == 0)
 126                         continue;
 127                 else if (sz != sizeof (gmem_case_ptr_t))
 128                         return (gmem_set_errno(EINVAL));
 129
 130                 fmd_buf_read(hdl, cp, fmd_case_uuid(hdl, cp), &ptr,
 131                     sizeof (gmem_case_ptr_t));
 132
 133                 if (ptr.ptr_type == 0 || ptr.ptr_type >
 134                     sizeof (gmem_case_restorers) /
 135                     sizeof (gmem_case_restorer_f *))
 136                         return (gmem_set_errno(EINVAL));
 137
 138                 if ((thing = gmem_case_restorers[ptr.ptr_type](hdl,
 139                     cp, &ptr)) == NULL) {
 140                         fmd_hdl_debug(hdl, "Unable to restore case %s\n", uuid);
 141                         continue;
 142                 }
 143
 144                 cl = fmd_hdl_alloc(hdl, sizeof (gmem_case_closer_t), FMD_SLEEP);
 145                 cl->cl_func = gmem_case_closers[ptr.ptr_subtype];
 146                 cl->cl_arg = thing;
 147                 fmd_case_setspecific(hdl, cp, cl);
 148         }
 149
 150         gmem_dimm_validate(hdl);
 151         gmem_page_validate(hdl);
 152
 153         return (0);
 154 }
 155
 156 void
 157 gmem_case_restore(fmd_hdl_t *hdl, gmem_case_t *cc, fmd_case_t *cp, char *serdnm)
 158 {
 159         if (!fmd_serd_exists(hdl, serdnm)) {
 160                 fmd_hdl_strfree(hdl, serdnm);
 161                 serdnm = NULL;
 162         }
 163
 164         cc->cc_cp = cp;
 165         cc->cc_serdnm = serdnm;
 166 }