usr/src/lib/sun_sas/common/Sun_sasGetNumberOfPorts.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 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #include <sun_sas.h>
  28
  29 /*
  30  * Returns the number of HBAs supported by the library.  This returns the
  31  * current number of HBAs, even if this changes
  32  *
  33  */
  34 HBA_UINT32 Sun_sasGetNumberOfPorts(
  35     HBA_HANDLE handle, HBA_UINT32 *numberofports)
  36 {
  37         const char                  ROUTINE[] = "Sun_sasGetNumberOfPorts";
  38         int                         count, index;
  39         struct  sun_sas_hba         *hba_ptr;
  40         struct  sun_sas_port        *hba_port_ptr;
  41
  42         if (numberofports == NULL) {
  43                 log(LOG_DEBUG, ROUTINE, "NULL numberofPorts pointer");
  44                 return (HBA_STATUS_ERROR_ARG);
  45         }
  46
  47         lock(&all_hbas_lock);
  48         index = RetrieveIndex(handle);
  49         lock(&open_handles_lock);
  50         hba_ptr = RetrieveHandle(index);
  51         if (hba_ptr == NULL) {
  52                 log(LOG_DEBUG, ROUTINE, "Invalid handle %08lx.", handle);
  53                 /* on error, need to set NumberOfEntries to 0 */
  54                 unlock(&open_handles_lock);
  55                 unlock(&all_hbas_lock);
  56                 return (HBA_STATUS_ERROR_INVALID_HANDLE);
  57         }
  58         /* goes through hba list counting all the hbas found */
  59         if (hba_ptr->first_port == NULL) {
  60                 log(LOG_DEBUG, ROUTINE, "No HBA Port found on handle %08lx.",
  61                     handle);
  62                 /* on error, need to set NumberOfPorts to 0 */
  63                 *numberofports = 0;
  64                 unlock(&open_handles_lock);
  65                 unlock(&all_hbas_lock);
  66                 return (HBA_STATUS_OK);
  67         }
  68
  69         for (count = 0, hba_port_ptr = hba_ptr->first_port;
  70             hba_port_ptr != NULL; hba_port_ptr = hba_port_ptr->next, count++) {}
  71
  72         *numberofports = count;
  73
  74         unlock(&open_handles_lock);
  75         unlock(&all_hbas_lock);
  76
  77         return (HBA_STATUS_OK);
  78
  79 }