usr/src/uts/common/io/drm/drm_kstat.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.
  23  * All rights reserved.  Use is subject to license terms.
  24  */
  25
  26 #include "drmP.h"
  27 #include <sys/kstat.h>
  28 #include <sys/ddi.h>
  29 #include <sys/sunddi.h>
  30 #include <sys/sunldi.h>
  31
  32 static char *drmkstat_name[] = {
  33         "opens",
  34         "closes",
  35         "IOCTLs",
  36         "locks",
  37         "unlocks",
  38         NULL
  39 };
  40
  41 static int
  42 drm_kstat_update(kstat_t *ksp, int flag)
  43 {
  44         drm_device_t *sc;
  45         kstat_named_t *knp;
  46         int tmp;
  47
  48         if (flag != KSTAT_READ)
  49                 return (EACCES);
  50
  51         sc = ksp->ks_private;
  52         knp = ksp->ks_data;
  53
  54         for (tmp = 1; tmp < 6; tmp++) {
  55                 (knp++)->value.ui32 = sc->counts[tmp];
  56         }
  57
  58         return (0);
  59 }
  60
  61 int
  62 drm_init_kstats(drm_device_t *sc)
  63 {
  64         int instance;
  65         kstat_t *ksp;
  66         kstat_named_t *knp;
  67         char *np;
  68         char **aknp;
  69
  70         instance = ddi_get_instance(sc->dip);
  71         aknp = drmkstat_name;
  72         ksp = kstat_create("drm", instance, "drminfo", "drm",
  73             KSTAT_TYPE_NAMED, sizeof (drmkstat_name)/sizeof (char *) - 1,
  74             KSTAT_FLAG_PERSISTENT);
  75         if (ksp == NULL)
  76                 return (0);
  77
  78         ksp->ks_private = sc;
  79         ksp->ks_update = drm_kstat_update;
  80         for (knp = ksp->ks_data; (np = (*aknp)) != NULL; knp++, aknp++) {
  81                 kstat_named_init(knp, np, KSTAT_DATA_UINT32);
  82         }
  83         kstat_install(ksp);
  84
  85         sc->asoft_ksp = ksp;
  86
  87         return (0);
  88 }
  89
  90 void
  91 drm_fini_kstats(drm_device_t *sc)
  92 {
  93         if (sc->asoft_ksp)
  94                 kstat_delete(sc->asoft_ksp);
  95         else
  96                 cmn_err(CE_WARN, "attempt to delete null kstat");
  97 }