usr/src/uts/i86pc/io/acpi/acpidev/acpidev_scope.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) 2009-2010, Intel Corporation.
  23  * All rights reserved.
  24  */
  25
  26 #include <sys/types.h>
  27 #include <sys/atomic.h>
  28 #include <sys/sunddi.h>
  29 #include <sys/sunndi.h>
  30 #include <sys/acpi/acpi.h>
  31 #include <sys/acpica.h>
  32 #include <sys/acpidev.h>
  33 #include <sys/acpidev_impl.h>
  34
  35 static ACPI_STATUS acpidev_scope_probe(acpidev_walk_info_t *infop);
  36 static acpidev_filter_result_t acpidev_scope_filter(acpidev_walk_info_t *infop,
  37     char *devname, int maxlen);
  38 static ACPI_STATUS acpidev_scope_init(acpidev_walk_info_t *infop);
  39
  40 /*
  41  * Default class driver for ACPI scope objects.
  42  * This class driver is used to handle predefined ACPI SCOPE objects
  43  * under the ACPI root object, such as _PR_, _SB_ and _TZ_ etc.
  44  * The default policy for ACPI SCOPE objects is SKIP.
  45  */
  46 acpidev_class_t acpidev_class_scope = {
  47         0,                              /* adc_refcnt */
  48         ACPIDEV_CLASS_REV1,             /* adc_version */
  49         ACPIDEV_CLASS_ID_SCOPE,         /* adc_class_id */
  50         "ACPI Scope",                   /* adc_class_name */
  51         ACPIDEV_TYPE_SCOPE,             /* adc_dev_type */
  52         NULL,                           /* adc_private */
  53         NULL,                           /* adc_pre_probe */
  54         NULL,                           /* adc_post_probe */
  55         acpidev_scope_probe,            /* adc_probe */
  56         acpidev_scope_filter,           /* adc_filter */
  57         acpidev_scope_init,             /* adc_init */
  58         NULL,                           /* adc_fini */
  59 };
  60
  61 acpidev_class_list_t *acpidev_class_list_scope = NULL;
  62
  63 /*
  64  * All SCOPE objects share a global pseudo unit address space across the system.
  65  */
  66 static uint32_t acpidev_scope_unitaddr = 0;
  67
  68 /* Filter rule table for ACPI SCOPE objects. */
  69 static acpidev_filter_rule_t acpidev_scope_filters[] = {
  70         {       /* For safety, _SB_ is hardcoded as DEVICE by acpica */
  71                 NULL,
  72                 0,
  73                 ACPIDEV_FILTER_DEFAULT,
  74                 &acpidev_class_list_device,
  75                 1,
  76                 1,
  77                 ACPIDEV_OBJECT_NAME_SB,
  78                 ACPIDEV_NODE_NAME_MODULE_SBD,
  79         },
  80         {       /* Handle _PR_ object. */
  81                 NULL,
  82                 0,
  83                 ACPIDEV_FILTER_SCAN,
  84                 &acpidev_class_list_scope,
  85                 1,
  86                 1,
  87                 ACPIDEV_OBJECT_NAME_PR,
  88                 ACPIDEV_NODE_NAME_PROCESSOR,
  89         },
  90         {       /* Ignore all other scope objects. */
  91                 NULL,
  92                 0,
  93                 ACPIDEV_FILTER_SKIP,
  94                 NULL,
  95                 1,
  96                 INT_MAX,
  97                 NULL,
  98                 NULL,
  99         }
 100 };
 101
 102 static ACPI_STATUS
 103 acpidev_scope_probe(acpidev_walk_info_t *infop)
 104 {
 105         ACPI_STATUS rc = AE_OK;
 106         int flags;
 107
 108         ASSERT(infop != NULL);
 109         ASSERT(infop->awi_hdl != NULL);
 110         ASSERT(infop->awi_info != NULL);
 111         if (infop->awi_info->Type != ACPI_TYPE_LOCAL_SCOPE) {
 112                 return (AE_OK);
 113         }
 114
 115         flags = ACPIDEV_PROCESS_FLAG_SCAN;
 116         switch (infop->awi_op_type) {
 117         case ACPIDEV_OP_BOOT_PROBE:
 118                 flags |= ACPIDEV_PROCESS_FLAG_CREATE;
 119                 break;
 120
 121         case ACPIDEV_OP_BOOT_REPROBE:
 122                 break;
 123
 124         case ACPIDEV_OP_HOTPLUG_PROBE:
 125                 flags |= ACPIDEV_PROCESS_FLAG_SYNCSTATUS |
 126                     ACPIDEV_PROCESS_FLAG_HOLDBRANCH;
 127                 break;
 128
 129         default:
 130                 ACPIDEV_DEBUG(CE_WARN, "!acpidev: unknown operation type %u "
 131                     "in acpidev_scope_probe().", infop->awi_op_type);
 132                 rc = AE_BAD_PARAMETER;
 133                 break;
 134         }
 135
 136         if (rc == AE_OK) {
 137                 rc = acpidev_process_object(infop, flags);
 138         }
 139         if (ACPI_FAILURE(rc) && rc != AE_NOT_EXIST && rc != AE_ALREADY_EXISTS) {
 140                 cmn_err(CE_WARN,
 141                     "!acpidev: failed to process scope object %s.",
 142                     infop->awi_name);
 143         } else {
 144                 rc = AE_OK;
 145         }
 146
 147         return (rc);
 148 }
 149
 150 static acpidev_filter_result_t
 151 acpidev_scope_filter(acpidev_walk_info_t *infop, char *devname, int maxlen)
 152 {
 153         acpidev_filter_result_t res;
 154
 155         ASSERT(infop != NULL);
 156         if (infop->awi_op_type == ACPIDEV_OP_BOOT_PROBE ||
 157             infop->awi_op_type == ACPIDEV_OP_BOOT_REPROBE ||
 158             infop->awi_op_type == ACPIDEV_OP_HOTPLUG_PROBE) {
 159                 res = acpidev_filter_device(infop, infop->awi_hdl,
 160                     ACPIDEV_ARRAY_PARAM(acpidev_scope_filters),
 161                     devname, maxlen);
 162         } else {
 163                 ACPIDEV_DEBUG(CE_WARN, "!acpidev: unknown operation type %u "
 164                     "in acpidev_scope_filter().", infop->awi_op_type);
 165                 res = ACPIDEV_FILTER_FAILED;
 166         }
 167
 168         return (res);
 169 }
 170
 171 static ACPI_STATUS
 172 acpidev_scope_init(acpidev_walk_info_t *infop)
 173 {
 174         char unitaddr[32];
 175         char *compatible[] = {
 176                 ACPIDEV_HID_SCOPE,
 177                 ACPIDEV_TYPE_SCOPE,
 178                 ACPIDEV_HID_VIRTNEX,
 179                 ACPIDEV_TYPE_VIRTNEX,
 180         };
 181
 182         ASSERT(infop != NULL);
 183         ASSERT(infop->awi_hdl != NULL);
 184         ASSERT(infop->awi_dip != NULL);
 185         if (ACPI_FAILURE(acpidev_set_compatible(infop,
 186             ACPIDEV_ARRAY_PARAM(compatible)))) {
 187                 return (AE_ERROR);
 188         }
 189         (void) snprintf(unitaddr, sizeof (unitaddr), "%u",
 190             atomic_inc_32_nv(&acpidev_scope_unitaddr) - 1);
 191         if (ACPI_FAILURE(acpidev_set_unitaddr(infop, NULL, 0, unitaddr))) {
 192                 return (AE_ERROR);
 193         }
 194
 195         return (AE_OK);
 196 }