acpidev_drv.c revision b72d5b75fd6f5bb08d29f65652d60058fc3a2608
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2009, Intel Corporation.
* All rights reserved.
*/
/*
* Platform specific device enumerator for ACPI specific devices.
* "x86 system devices" refers to the suite of hardware components which are
* common to the x86 platform and play important roles in the system
* architecture but can't be enumerated/discovered through industry-standard
* bus specifications. Examples of these x86 system devices include:
* * Logical processor/CPU
* * Memory device
* * Non-PCI discoverable IOMMU or DMA Remapping Engine
* * Non-PCI discoverable IOxAPIC
* * Non-PCI discoverable HPET (High Precision Event Timer)
* * ACPI defined devices, including power button, sleep button, battery etc.
*
* X86 system devices may be discovered through BIOS/Firmware interfaces, such
* as SMBIOS tables, MPS tables and ACPI tables since their discovery isn't
* covered by any industry-standard bus specifications.
*
* In order to aid Solaris in flexibly managing x86 system devices,
* x86 system devices are placed into a specific firmware device
* subtree whose device path is '/devices/fw'.
*
* This driver populates the firmware device subtree with ACPI-discoverable
* system devices if possible. To achieve that, the ACPI object
* namespace is abstracted as ACPI virtual buses which host system devices.
* Another nexus driver for the ACPI virtual bus will manage all devices
* connected to it.
*
* For more detailed information, please refer to PSARC/2009/104.
*/
#include <sys/types.h>
#include <sys/bitmap.h>
#include <sys/cmn_err.h>
#include <sys/ddi_subrdefs.h>
#include <sys/errno.h>
#include <sys/modctl.h>
#include <sys/mutex.h>
#include <sys/obpdefs.h>
#include <sys/sunddi.h>
#include <sys/sunndi.h>
#include <sys/acpi/acpi.h>
#include <sys/acpica.h>
#include <sys/acpidev.h>
#include <sys/acpidev_impl.h>
/* Patchable through /etc/system */
int acpidev_options = 0;
int acpidev_debug = 0;
acpidev_class_list_t *acpidev_class_list_root = NULL;
/* ACPI device autoconfig global status */
typedef enum acpidev_status {
ACPIDEV_STATUS_FAILED = -2, /* ACPI device autoconfig failed */
ACPIDEV_STATUS_DISABLED = -1, /* ACPI device autoconfig disabled */
ACPIDEV_STATUS_UNKNOWN = 0, /* initial status */
ACPIDEV_STATUS_INITIALIZED, /* ACPI device autoconfig initialized */
ACPIDEV_STATUS_FIRST_PASS, /* first probing finished */
ACPIDEV_STATUS_READY /* second probing finished */
} acpidev_status_t;
static acpidev_status_t acpidev_status = ACPIDEV_STATUS_UNKNOWN;
static kmutex_t acpidev_drv_lock;
static krwlock_t acpidev_class_lock;
static dev_info_t *acpidev_root_dip = NULL;
static ulong_t acpidev_object_type_mask[BT_BITOUL(ACPI_TYPE_NS_NODE_MAX + 1)];
/* Boot time ACPI device enumerator. */
static void acpidev_boot_probe(int type);
/* DDI module auto configuration interface */
extern struct mod_ops mod_miscops;
static struct modlmisc modlmisc = {
&mod_miscops,
"ACPI device enumerator"
};
static struct modlinkage modlinkage = {
MODREV_1,
(void *)&modlmisc,
NULL
};
int
_init(void)
{
int err;
if ((err = mod_install(&modlinkage)) == 0) {
bzero(acpidev_object_type_mask,
sizeof (acpidev_object_type_mask));
mutex_init(&acpidev_drv_lock, NULL, MUTEX_DRIVER, NULL);
rw_init(&acpidev_class_lock, NULL, RW_DEFAULT, NULL);
impl_bus_add_probe(acpidev_boot_probe);
} else {
cmn_err(CE_WARN, "!acpidev: failed to install driver.");
}
return (err);
}
int
_fini(void)
{
/* No support for module unload. */
return (EBUSY);
}
int
_info(struct modinfo *modinfop)
{
return (mod_info(&modlinkage, modinfop));
}
/* Check blacklists and load platform specific driver modules. */
static ACPI_STATUS
acpidev_load_plat_modules(void)
{
return (AE_OK);
}
/* Unload platform specific driver modules. */
static void
acpidev_unload_plat_modules(void)
{
}
/* Unregister all device class drivers from the device driver lists. */
static void
acpidev_class_list_fini(void)
{
acpidev_unload_plat_modules();
if ((acpidev_options & ACPIDEV_OUSER_NO_MEM) == 0) {
(void) acpidev_unregister_class(&acpidev_class_list_device,
&acpidev_class_memory);
}
if (acpidev_options & ACPIDEV_OUSER_NO_CPU) {
(void) acpidev_unregister_class(&acpidev_class_list_device,
&acpidev_class_cpu);
(void) acpidev_unregister_class(&acpidev_class_list_scope,
&acpidev_class_cpu);
(void) acpidev_unregister_class(&acpidev_class_list_root,
&acpidev_class_cpu);
}
if ((acpidev_options & ACPIDEV_OUSER_NO_CONTAINER) == 0) {
(void) acpidev_unregister_class(&acpidev_class_list_device,
&acpidev_class_container);
}
(void) acpidev_unregister_class(&acpidev_class_list_device,
&acpidev_class_device);
(void) acpidev_unregister_class(&acpidev_class_list_root,
&acpidev_class_device);
(void) acpidev_unregister_class(&acpidev_class_list_root,
&acpidev_class_scope);
}
/* Register all device class drivers onto the driver lists. */
static ACPI_STATUS
acpidev_class_list_init(uint64_t *fp)
{
ACPI_STATUS rc = AE_OK;
/* Set bit in mask for supported object types. */
BT_SET(acpidev_object_type_mask, ACPI_TYPE_LOCAL_SCOPE);
BT_SET(acpidev_object_type_mask, ACPI_TYPE_DEVICE);
/*
* Register the ACPI scope class driver onto the class driver lists.
* Currently only ACPI scope objects under ACPI root node, such as _PR,
* _SB, _TZ etc, need to be handled, so only register the scope class
* driver onto the root list.
*/
if (ACPI_FAILURE(acpidev_register_class(&acpidev_class_list_root,
&acpidev_class_scope, B_FALSE))) {
goto error_out;
}
/*
* Register the ACPI device class driver onto the class driver lists.
* The ACPI device class driver should be registered at the tail to
* handle all device objects which haven't been handled by other
* HID/CID specific device class drivers.
*/
if (ACPI_FAILURE(acpidev_register_class(&acpidev_class_list_root,
&acpidev_class_device, B_TRUE))) {
goto error_root_device;
}
if (ACPI_FAILURE(acpidev_register_class(&acpidev_class_list_device,
&acpidev_class_device, B_TRUE))) {
goto error_device_device;
}
/* Check and register support for ACPI container device. */
if ((acpidev_options & ACPIDEV_OUSER_NO_CONTAINER) == 0) {
if (ACPI_FAILURE(acpidev_register_class(
&acpidev_class_list_device, &acpidev_class_container,
B_FALSE))) {
goto error_device_container;
}
*fp |= ACPI_DEVCFG_CONTAINER;
}
/* Check and register support for ACPI CPU device. */
if ((acpidev_options & ACPIDEV_OUSER_NO_CPU) == 0) {
/* Handle ACPI CPU Device */
if (ACPI_FAILURE(acpidev_register_class(
&acpidev_class_list_device, &acpidev_class_cpu, B_FALSE))) {
goto error_device_cpu;
}
/* Handle ACPI Processor under _PR */
if (ACPI_FAILURE(acpidev_register_class(
&acpidev_class_list_scope, &acpidev_class_cpu, B_FALSE))) {
goto error_scope_cpu;
}
/* House-keeping for CPU scan */
if (ACPI_FAILURE(acpidev_register_class(
&acpidev_class_list_root, &acpidev_class_cpu, B_FALSE))) {
goto error_root_cpu;
}
BT_SET(acpidev_object_type_mask, ACPI_TYPE_PROCESSOR);
*fp |= ACPI_DEVCFG_CPU;
}
/* Check support for ACPI memory device. */
if ((acpidev_options & ACPIDEV_OUSER_NO_MEM) == 0) {
/*
* Register the ACPI memory class driver onto the
* acpidev_class_list_device list because ACPI module
* class driver uses that list.
*/
if (ACPI_FAILURE(acpidev_register_class(
&acpidev_class_list_device, &acpidev_class_memory,
B_FALSE))) {
goto error_device_memory;
}
*fp |= ACPI_DEVCFG_MEMORY;
}
/* Check blacklist and load platform specific modules. */
rc = acpidev_load_plat_modules();
if (ACPI_FAILURE(rc)) {
ACPIDEV_DEBUG(CE_WARN, "acpidev: failed to check blacklist "
"or load pratform modules.");
goto error_plat;
}
return (AE_OK);
error_plat:
if ((acpidev_options & ACPIDEV_OUSER_NO_MEM) == 0) {
(void) acpidev_unregister_class(&acpidev_class_list_device,
&acpidev_class_memory);
}
error_device_memory:
if (acpidev_options & ACPIDEV_OUSER_NO_CPU) {
(void) acpidev_unregister_class(&acpidev_class_list_root,
&acpidev_class_cpu);
}
error_root_cpu:
if (acpidev_options & ACPIDEV_OUSER_NO_CPU) {
(void) acpidev_unregister_class(&acpidev_class_list_scope,
&acpidev_class_cpu);
}
error_scope_cpu:
if (acpidev_options & ACPIDEV_OUSER_NO_CPU) {
(void) acpidev_unregister_class(&acpidev_class_list_device,
&acpidev_class_cpu);
}
error_device_cpu:
if ((acpidev_options & ACPIDEV_OUSER_NO_CONTAINER) == 0) {
(void) acpidev_unregister_class(&acpidev_class_list_device,
&acpidev_class_container);
}
error_device_container:
(void) acpidev_unregister_class(&acpidev_class_list_device,
&acpidev_class_device);
error_device_device:
(void) acpidev_unregister_class(&acpidev_class_list_root,
&acpidev_class_device);
error_root_device:
(void) acpidev_unregister_class(&acpidev_class_list_root,
&acpidev_class_scope);
error_out:
ACPIDEV_DEBUG(CE_WARN,
"acpidev: failed to register built-in class drivers.");
*fp = 0;
return (AE_ERROR);
}
/*
* Called in single threaded context during boot, no protection for
* reentrance.
*/
static ACPI_STATUS
acpidev_create_root_node(void)
{
int circ, rv = AE_OK;
dev_info_t *dip = NULL;
acpidev_data_handle_t objhdl;
char *compatibles[] = {
ACPIDEV_HID_ROOTNEX,
ACPIDEV_TYPE_ROOTNEX,
ACPIDEV_HID_VIRTNEX,
ACPIDEV_TYPE_VIRTNEX,
};
ndi_devi_enter(ddi_root_node(), &circ);
ASSERT(acpidev_root_dip == NULL);
/* Query whether device node already exists. */
dip = ddi_find_devinfo(ACPIDEV_NODE_NAME_ROOT, -1, 0);
if (dip != NULL && ddi_get_parent(dip) == ddi_root_node()) {
ndi_devi_exit(ddi_root_node(), circ);
cmn_err(CE_WARN, "!acpidev: node /devices/%s already exists, "
"disable driver.", ACPIDEV_NODE_NAME_ROOT);
return (AE_ALREADY_EXISTS);
}
/* Create the device node if it doesn't exist. */
rv = ndi_devi_alloc(ddi_root_node(), ACPIDEV_NODE_NAME_ROOT,
(pnode_t)DEVI_SID_NODEID, &dip);
if (rv != NDI_SUCCESS) {
ndi_devi_exit(ddi_root_node(), circ);
ACPIDEV_DEBUG(CE_WARN, "acpidev: failed to create device node "
"for ACPI root with errcode %d.", rv);
return (AE_ERROR);
}
/* Build cross reference between dip and ACPI object. */
if (ACPI_FAILURE(acpica_tag_devinfo(dip, ACPI_ROOT_OBJECT))) {
(void) ddi_remove_child(dip, 0);
ndi_devi_exit(ddi_root_node(), circ);
ACPIDEV_DEBUG(CE_WARN, "acpidev: failed to tag object %s.",
ACPIDEV_OBJECT_NAME_SB);
return (AE_ERROR);
}
/* Set device properties. */
rv = ndi_prop_update_string_array(DDI_DEV_T_NONE, dip,
OBP_COMPATIBLE, ACPIDEV_ARRAY_PARAM(compatibles));
if (rv == NDI_SUCCESS) {
rv = ndi_prop_update_string(DDI_DEV_T_NONE, dip,
OBP_DEVICETYPE, ACPIDEV_TYPE_ROOTNEX);
}
if (rv != DDI_SUCCESS) {
ACPIDEV_DEBUG(CE_WARN,
"acpidev: failed to set device property for /devices/%s.",
ACPIDEV_NODE_NAME_ROOT);
goto error_out;
}
/* Manually create an object handle for the root node */
objhdl = acpidev_data_create_handle(ACPI_ROOT_OBJECT);
if (objhdl == NULL) {
ACPIDEV_DEBUG(CE_WARN, "acpidev: failed to create object "
"handle for the root node.");
goto error_out;
}
objhdl->aod_level = 0;
objhdl->aod_hdl = ACPI_ROOT_OBJECT;
objhdl->aod_dip = dip;
objhdl->aod_class = &acpidev_class_scope;
objhdl->aod_status = acpidev_query_device_status(ACPI_ROOT_OBJECT);
objhdl->aod_iflag = ACPIDEV_ODF_STATUS_VALID |
ACPIDEV_ODF_DEVINFO_CREATED | ACPIDEV_ODF_DEVINFO_TAGGED;
/* Bind device driver. */
(void) ndi_devi_bind_driver(dip, 0);
acpidev_root_dip = dip;
ndi_devi_exit(ddi_root_node(), circ);
return (AE_OK);
error_out:
(void) acpica_untag_devinfo(dip, ACPI_ROOT_OBJECT);
(void) ddi_remove_child(dip, 0);
ndi_devi_exit(ddi_root_node(), circ);
return (AE_ERROR);
}
static void
acpidev_initialize(void)
{
int rc;
char *str = NULL;
uint64_t features = 0;
/* Check whether it has already been initialized. */
if (acpidev_status == ACPIDEV_STATUS_DISABLED) {
cmn_err(CE_CONT, "?acpidev: ACPI device autoconfig "
"disabled by user.\n");
return;
} else if (acpidev_status != ACPIDEV_STATUS_UNKNOWN) {
ACPIDEV_DEBUG(CE_NOTE,
"acpidev: initialization called more than once.");
return;
}
/* Check whether ACPI device autoconfig has been disabled by user. */
rc = ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
DDI_PROP_DONTPASS, "acpidev-autoconfig", &str);
if (rc == DDI_SUCCESS) {
if (strcasecmp(str, "off") == 0 || strcasecmp(str, "no") == 0) {
cmn_err(CE_CONT, "?acpidev: ACPI device autoconfig "
"disabled by user.\n");
ddi_prop_free(str);
acpidev_status = ACPIDEV_STATUS_DISABLED;
return;
}
ddi_prop_free(str);
}
/* Initialize acpica subsystem. */
if (ACPI_FAILURE(acpica_init())) {
cmn_err(CE_WARN,
"!acpidev: failed to initialize acpica subsystem.");
acpidev_status = ACPIDEV_STATUS_FAILED;
return;
}
/* Check ACPICA subsystem status. */
if (!acpica_get_core_feature(ACPI_FEATURE_FULL_INIT)) {
cmn_err(CE_WARN, "!acpidev: ACPICA hasn't been fully "
"initialized, ACPI device autoconfig will be disabled.");
acpidev_status = ACPIDEV_STATUS_DISABLED;
return;
}
/* Converts acpidev-options from type string to int, if any */
if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
DDI_PROP_DONTPASS, "acpidev-options", &str) == DDI_PROP_SUCCESS) {
long data;
rc = ddi_strtol(str, NULL, 0, &data);
if (rc == 0) {
(void) e_ddi_prop_remove(DDI_DEV_T_NONE,
ddi_root_node(), "acpidev-options");
(void) e_ddi_prop_update_int(DDI_DEV_T_NONE,
ddi_root_node(), "acpidev-options", data);
}
ddi_prop_free(str);
}
/* Get acpidev_options user options. */
acpidev_options = ddi_prop_get_int(DDI_DEV_T_ANY, ddi_root_node(),
DDI_PROP_DONTPASS, "acpidev-options", acpidev_options);
/* Register all device class drivers. */
if (ACPI_FAILURE(acpidev_class_list_init(&features))) {
cmn_err(CE_WARN,
"!acpidev: failed to initalize class driver lists.");
acpidev_status = ACPIDEV_STATUS_FAILED;
return;
}
/* Create root node for ACPI/firmware device subtree. */
if (ACPI_FAILURE(acpidev_create_root_node())) {
cmn_err(CE_WARN, "!acpidev: failed to create root node "
"for acpi device tree.");
acpidev_class_list_fini();
acpidev_status = ACPIDEV_STATUS_FAILED;
return;
}
/* Notify acpica to enable ACPI device auto configuration. */
acpica_set_core_feature(ACPI_FEATURE_DEVCFG);
acpica_set_devcfg_feature(features);
ACPIDEV_DEBUG(CE_NOTE, "!acpidev: ACPI device autoconfig initialized.");
acpidev_status = ACPIDEV_STATUS_INITIALIZED;
}
/*
* Probe devices in ACPI namespace which can't be enumerated by other methods
* at boot time.
*/
static ACPI_STATUS
acpidev_boot_probe_device(acpidev_op_type_t op_type)
{
ACPI_STATUS rc = AE_OK;
acpidev_walk_info_t *infop;
ASSERT(acpidev_root_dip != NULL);
ASSERT(op_type == ACPIDEV_OP_BOOT_PROBE ||
op_type == ACPIDEV_OP_BOOT_REPROBE);
infop = acpidev_alloc_walk_info(op_type, 0, ACPI_ROOT_OBJECT,
&acpidev_class_list_root, NULL);
if (infop == NULL) {
ACPIDEV_DEBUG(CE_WARN, "acpidev: failed to allocate walk info "
"object in acpi_boot_probe_device().");
return (AE_ERROR);
}
/* Enumerate ACPI devices. */
rc = acpidev_probe_child(infop);
if (ACPI_FAILURE(rc)) {
cmn_err(CE_WARN, "!acpidev: failed to probe child object "
"under ACPI root node.");
}
acpidev_free_walk_info(infop);
return (rc);
}
/*
* Platform specific device prober for ACPI virtual bus.
* It will be called in single-threaded environment to enumerate devices in
* ACPI namespace at boot time.
*/
static void
acpidev_boot_probe(int type)
{
ACPI_STATUS rc;
/* Initialize subsystem on first pass. */
mutex_enter(&acpidev_drv_lock);
if (type == 0) {
acpidev_initialize();
if (acpidev_status != ACPIDEV_STATUS_INITIALIZED &&
acpidev_status != ACPIDEV_STATUS_DISABLED) {
cmn_err(CE_WARN, "!acpidev: driver disabled due to "
"initalization failure.");
}
}
/* Probe ACPI devices */
if (type == 0 && acpidev_status == ACPIDEV_STATUS_INITIALIZED) {
rc = acpidev_boot_probe_device(ACPIDEV_OP_BOOT_PROBE);
if (ACPI_SUCCESS(rc)) {
acpidev_status = ACPIDEV_STATUS_FIRST_PASS;
} else {
ACPIDEV_DEBUG(CE_WARN, "acpidev: failed to probe ACPI "
"devices during boot.");
acpidev_status = ACPIDEV_STATUS_FAILED;
}
} else if (type != 0 && acpidev_status == ACPIDEV_STATUS_FIRST_PASS) {
rc = acpidev_boot_probe_device(ACPIDEV_OP_BOOT_REPROBE);
if (ACPI_SUCCESS(rc)) {
acpidev_status = ACPIDEV_STATUS_READY;
} else {
ACPIDEV_DEBUG(CE_WARN, "acpidev: failed to reprobe "
"ACPI devices during boot.");
acpidev_status = ACPIDEV_STATUS_FAILED;
}
} else if (acpidev_status != ACPIDEV_STATUS_FAILED &&
acpidev_status != ACPIDEV_STATUS_DISABLED &&
acpidev_status != ACPIDEV_STATUS_READY) {
cmn_err(CE_WARN,
"!acpidev: invalid ACPI device autoconfig global status.");
}
mutex_exit(&acpidev_drv_lock);
}
ACPI_STATUS
acpidev_probe_child(acpidev_walk_info_t *infop)
{
int circ;
dev_info_t *pdip;
ACPI_STATUS res, rc = AE_OK;
ACPI_HANDLE child;
ACPI_OBJECT_TYPE type;
acpidev_class_list_t *it;
acpidev_walk_info_t *cinfop;
acpidev_data_handle_t datap;
/* Validate parameter first. */
ASSERT(infop != NULL);
if (infop == NULL) {
ACPIDEV_DEBUG(CE_WARN,
"acpidev: infop is NULL in acpidev_probe_child().");
return (AE_BAD_PARAMETER);
}
ASSERT(infop->awi_level < ACPIDEV_MAX_ENUM_LEVELS - 1);
if (infop->awi_level >= ACPIDEV_MAX_ENUM_LEVELS - 1) {
ACPIDEV_DEBUG(CE_WARN, "acpidev: recursive level is too deep "
"in acpidev_probe_child().");
return (AE_BAD_PARAMETER);
}
ASSERT(infop->awi_class_list != NULL);
ASSERT(infop->awi_hdl != NULL);
ASSERT(infop->awi_info != NULL);
ASSERT(infop->awi_name != NULL);
ASSERT(infop->awi_data != NULL);
if (infop->awi_class_list == NULL || infop->awi_hdl == NULL ||
infop->awi_info == NULL || infop->awi_name == NULL ||
infop->awi_data == NULL) {
ACPIDEV_DEBUG(CE_WARN,
"acpidev: infop has NULL fields in acpidev_probe_child().");
return (AE_BAD_PARAMETER);
}
pdip = acpidev_walk_info_get_pdip(infop);
if (pdip == NULL) {
ACPIDEV_DEBUG(CE_WARN,
"acpidev: pdip is NULL in acpidev_probe_child().");
return (AE_BAD_PARAMETER);
}
ndi_devi_enter(pdip, &circ);
rw_enter(&acpidev_class_lock, RW_READER);
/* Call pre-probe callback functions. */
for (it = *(infop->awi_class_list); it != NULL; it = it->acl_next) {
if (it->acl_class->adc_pre_probe == NULL) {
continue;
}
infop->awi_class_curr = it->acl_class;
if (ACPI_FAILURE(it->acl_class->adc_pre_probe(infop))) {
ACPIDEV_DEBUG(CE_WARN, "acpidev: failed to pre-probe "
"device of type %s under %s.",
it->acl_class->adc_class_name, infop->awi_name);
}
}
/* Walk child objects. */
child = NULL;
while (ACPI_SUCCESS(AcpiGetNextObject(ACPI_TYPE_ANY,
infop->awi_hdl, child, &child))) {
/* Skip object if we're not interested in it. */
if (ACPI_FAILURE(AcpiGetType(child, &type)) ||
type > ACPI_TYPE_NS_NODE_MAX ||
BT_TEST(acpidev_object_type_mask, type) == 0) {
continue;
}
/* Allocate the walk info structure. */
cinfop = acpidev_alloc_walk_info(infop->awi_op_type,
infop->awi_level + 1, child, NULL, infop);
if (cinfop == NULL) {
ACPIDEV_DEBUG(CE_WARN, "acpidev: failed to allocate "
"walk info child object of %s.",
infop->awi_name);
/* Mark error and continue to handle next child. */
rc = AE_ERROR;
continue;
}
/*
* Remember the class list used to handle this object.
* It should be the same list for different passes of scans.
*/
ASSERT(cinfop->awi_data != NULL);
datap = cinfop->awi_data;
if (cinfop->awi_op_type == ACPIDEV_OP_BOOT_PROBE) {
datap->aod_class_list = infop->awi_class_list;
} else if (datap->aod_class_list != infop->awi_class_list) {
ACPIDEV_DEBUG(CE_WARN,
"acpidev: class list for %s has been changed",
infop->awi_name);
acpidev_free_walk_info(cinfop);
continue;
}
/* Call registered process callbacks. */
for (it = *(infop->awi_class_list); it != NULL;
it = it->acl_next) {
if (it->acl_class->adc_probe == NULL) {
continue;
}
cinfop->awi_class_curr = it->acl_class;
res = it->acl_class->adc_probe(cinfop);
if (ACPI_FAILURE(res)) {
rc = res;
ACPIDEV_DEBUG(CE_WARN, "acpidev: failed to "
"process object of type %s under %s.",
it->acl_class->adc_class_name,
infop->awi_name);
}
}
/* Free resources. */
acpidev_free_walk_info(cinfop);
}
/* Call post-probe callback functions. */
for (it = *(infop->awi_class_list); it != NULL; it = it->acl_next) {
if (it->acl_class->adc_post_probe == NULL) {
continue;
}
infop->awi_class_curr = it->acl_class;
if (ACPI_FAILURE(it->acl_class->adc_post_probe(infop))) {
ACPIDEV_DEBUG(CE_WARN, "acpidev: failed to post-probe "
"device of type %s under %s.",
it->acl_class->adc_class_name, infop->awi_name);
}
}
rw_exit(&acpidev_class_lock);
ndi_devi_exit(pdip, circ);
return (rc);
}
ACPI_STATUS
acpidev_process_object(acpidev_walk_info_t *infop, int flags)
{
ACPI_STATUS rc = AE_OK;
char *devname;
dev_info_t *dip, *pdip;
ACPI_HANDLE hdl;
ACPI_DEVICE_INFO *adip;
acpidev_class_t *clsp;
acpidev_data_handle_t datap;
acpidev_filter_result_t res;
/* Validate parameters first. */
ASSERT(infop != NULL);
if (infop == NULL) {
ACPIDEV_DEBUG(CE_WARN,
"acpidev: infop is NULL in acpidev_process_object().");
return (AE_BAD_PARAMETER);
}
ASSERT(infop->awi_hdl != NULL);
ASSERT(infop->awi_info != NULL);
ASSERT(infop->awi_data != NULL);
ASSERT(infop->awi_class_curr != NULL);
ASSERT(infop->awi_class_curr->adc_filter != NULL);
hdl = infop->awi_hdl;
adip = infop->awi_info;
datap = infop->awi_data;
clsp = infop->awi_class_curr;
if (hdl == NULL || datap == NULL || adip == NULL || clsp == NULL ||
clsp->adc_filter == NULL) {
ACPIDEV_DEBUG(CE_WARN, "acpidev: infop has NULL pointer in "
"acpidev_process_object().");
return (AE_BAD_PARAMETER);
}
pdip = acpidev_walk_info_get_pdip(infop);
if (pdip == NULL) {
ACPIDEV_DEBUG(CE_WARN, "acpidev: failed to get pdip for %s "
"in acpidev_process_object().", infop->awi_name);
return (AE_BAD_PARAMETER);
}
/*
* Check whether the object has already been handled.
* Tag and child dip pointer are used to indicate the object has been
* handled by the ACPI auto configure driver. It has the
* following usages:
* 1) Prevent creating dip for objects which already have a dip
* when reloading the ACPI auto configure driver.
* 2) Prevent creating multiple dips for ACPI objects with ACPI
* aliases. Currently ACPICA framework has no way to tell whether
* an object is an alias or not for some types of object. So tag
* is used to indicate that the object has been handled.
* 3) Prevent multiple class drivers from creating multiple devices for
* the same ACPI object.
*/
if ((flags & ACPIDEV_PROCESS_FLAG_CREATE) &&
(flags & ACPIDEV_PROCESS_FLAG_CHECK) &&
!(infop->awi_flags & ACPIDEV_WI_DISABLE_CREATE) &&
(infop->awi_flags & ACPIDEV_WI_DEVICE_CREATED)) {
ASSERT(infop->awi_dip != NULL);
ACPIDEV_DEBUG(CE_NOTE,
"acpidev: device has already been created for object %s.",
infop->awi_name);
return (AE_ALREADY_EXISTS);
}
/*
* Determine action according to following rules based on device
* status returned by _STA method. Please refer to ACPI3.0b section
* 6.3.1 and 6.5.1.
* present functioning enabled Action
* 0 0 x Do nothing
* 1 x 0 Create node in OFFLINE and scan child
* 1 x 1 Create node and scan child
* x 1 0 Create node in OFFLINE and scan child
* x 1 1 Create node and scan child
*/
if ((datap->aod_iflag & ACPIDEV_ODF_STATUS_VALID) == 0 ||
(flags & ACPIDEV_PROCESS_FLAG_SYNCSTATUS)) {
if (adip->Valid & ACPI_VALID_STA) {
datap->aod_status = adip->CurrentStatus;
} else {
datap->aod_status = acpidev_query_device_status(hdl);
}
datap->aod_iflag |= ACPIDEV_ODF_STATUS_VALID;
}
if (!acpidev_check_device_present(datap->aod_status)) {
ACPIDEV_DEBUG(CE_NOTE, "acpidev: object %s doesn't exist.",
infop->awi_name);
return (AE_NOT_EXIST);
}
ASSERT(infop->awi_data != NULL);
ASSERT(infop->awi_parent != NULL);
ASSERT(infop->awi_parent->awi_data != NULL);
/* Put device into offline state if parent is in offline state. */
if (infop->awi_parent->awi_data->aod_iflag &
ACPIDEV_ODF_DEVINFO_OFFLINE) {
flags |= ACPIDEV_PROCESS_FLAG_OFFLINE;
/* Put device into offline state if it's disabled. */
} else if (!acpidev_check_device_enabled(datap->aod_status)) {
flags |= ACPIDEV_PROCESS_FLAG_OFFLINE;
}
/*
* Mark current node status as OFFLINE even if a device node will not
* be created for it. This is needed to handle the case when the current
* node is SKIPPED (no device node will be created for it), so that all
* descedants of current nodes could be correctly marked as OFFLINE.
*/
if (flags & ACPIDEV_PROCESS_FLAG_OFFLINE) {
infop->awi_data->aod_iflag |= ACPIDEV_ODF_DEVINFO_OFFLINE;
}
/* Evaluate filtering rules and generate device name. */
devname = kmem_zalloc(ACPIDEV_MAX_NAMELEN + 1, KM_SLEEP);
(void) memcpy(devname, (char *)&adip->Name, sizeof (adip->Name));
if (flags & ACPIDEV_PROCESS_FLAG_CREATE) {
res = clsp->adc_filter(infop, devname, ACPIDEV_MAX_NAMELEN);
} else {
res = clsp->adc_filter(infop, NULL, 0);
}
/* Create device if requested. */
if ((flags & ACPIDEV_PROCESS_FLAG_CREATE) &&
!(infop->awi_flags & ACPIDEV_WI_DISABLE_CREATE) &&
!(infop->awi_flags & ACPIDEV_WI_DEVICE_CREATED) &&
(res == ACPIDEV_FILTER_DEFAULT || res == ACPIDEV_FILTER_CREATE)) {
int ret;
/*
* Allocate dip and set default properties.
* Properties can be overriden in class specific init routines.
*/
ASSERT(infop->awi_dip == NULL);
ndi_devi_alloc_sleep(pdip, devname, (pnode_t)DEVI_SID_NODEID,
&dip);
infop->awi_dip = dip;
ret = ndi_prop_update_string(DDI_DEV_T_NONE, dip,
OBP_DEVICETYPE, clsp->adc_dev_type);
if (ret != NDI_SUCCESS) {
ACPIDEV_DEBUG(CE_WARN,
"acpidev: failed to set device property for %s.",
infop->awi_name);
(void) ddi_remove_child(dip, 0);
infop->awi_dip = NULL;
kmem_free(devname, ACPIDEV_MAX_NAMELEN + 1);
return (AE_ERROR);
}
/* Build cross reference between dip and ACPI object. */
if ((flags & ACPIDEV_PROCESS_FLAG_NOTAG) == 0 &&
ACPI_FAILURE(acpica_tag_devinfo(dip, hdl))) {
cmn_err(CE_WARN,
"!acpidev: failed to tag object %s.",
infop->awi_name);
(void) ddi_remove_child(dip, 0);
infop->awi_dip = NULL;
kmem_free(devname, ACPIDEV_MAX_NAMELEN + 1);
return (AE_ERROR);
}
/* Call class specific initialization callback. */
if (clsp->adc_init != NULL &&
ACPI_FAILURE(clsp->adc_init(infop))) {
ACPIDEV_DEBUG(CE_WARN,
"acpidev: failed to initialize device %s.",
infop->awi_name);
if ((flags & ACPIDEV_PROCESS_FLAG_NOTAG) == 0) {
(void) acpica_untag_devinfo(dip, hdl);
}
(void) ddi_remove_child(dip, 0);
infop->awi_dip = NULL;
kmem_free(devname, ACPIDEV_MAX_NAMELEN + 1);
return (AE_ERROR);
}
/* Set device into offline state if requested. */
if (flags & ACPIDEV_PROCESS_FLAG_OFFLINE) {
mutex_enter(&(DEVI(dip)->devi_lock));
DEVI_SET_DEVICE_OFFLINE(dip);
mutex_exit(&(DEVI(dip)->devi_lock));
}
/* Mark status */
infop->awi_flags |= ACPIDEV_WI_DEVICE_CREATED;
datap->aod_iflag |= ACPIDEV_ODF_DEVINFO_CREATED;
datap->aod_dip = dip;
datap->aod_class = clsp;
/* Hold reference count on class driver. */
atomic_inc_32(&clsp->adc_refcnt);
if ((flags & ACPIDEV_PROCESS_FLAG_NOTAG) == 0) {
datap->aod_iflag |= ACPIDEV_ODF_DEVINFO_TAGGED;
}
/* Bind device driver. */
if ((flags & ACPIDEV_PROCESS_FLAG_NOBIND) != 0) {
mutex_enter(&(DEVI(dip)->devi_lock));
DEVI(dip)->devi_flags |= DEVI_NO_BIND;
mutex_exit(&(DEVI(dip)->devi_lock));
} else {
(void) ndi_devi_bind_driver(dip, 0);
}
}
/* Free resources */
kmem_free(devname, ACPIDEV_MAX_NAMELEN + 1);
rc = AE_OK;
/* Recursively scan child objects if requested. */
switch (res) {
case ACPIDEV_FILTER_DEFAULT:
/* FALLTHROUGH */
case ACPIDEV_FILTER_SCAN:
/* Check if we need to scan child. */
if ((flags & ACPIDEV_PROCESS_FLAG_SCAN) &&
!(infop->awi_flags & ACPIDEV_WI_DISABLE_SCAN) &&
!(infop->awi_flags & ACPIDEV_WI_CHILD_SCANNED)) {
/* probe child object. */
rc = acpidev_probe_child(infop);
if (ACPI_FAILURE(rc)) {
ACPIDEV_DEBUG(CE_WARN,
"acpidev: failed to probe subtree of %s.",
infop->awi_name);
rc = AE_ERROR;
}
/* Mark object as scanned. */
infop->awi_flags |= ACPIDEV_WI_CHILD_SCANNED;
}
break;
case ACPIDEV_FILTER_CREATE:
/* FALLTHROUGH */
case ACPIDEV_FILTER_CONTINUE:
/* FALLTHROUGH */
case ACPIDEV_FILTER_SKIP:
break;
case ACPIDEV_FILTER_FAILED:
ACPIDEV_DEBUG(CE_WARN,
"acpidev: failed to probe device for %s.",
infop->awi_name);
rc = AE_ERROR;
break;
default:
cmn_err(CE_WARN,
"!acpidev: unknown filter result code %d.", res);
rc = AE_ERROR;
break;
}
return (rc);
}
/*ARGSUSED*/
acpidev_filter_result_t
acpidev_filter_default(acpidev_walk_info_t *infop, ACPI_HANDLE hdl,
acpidev_filter_rule_t *afrp, char *devname, int len)
{
ASSERT(afrp != NULL);
ASSERT(devname == NULL || len >= ACPIDEV_MAX_NAMELEN);
if (infop->awi_level < afrp->adf_minlvl ||
infop->awi_level > afrp->adf_maxlvl) {
return (ACPIDEV_FILTER_CONTINUE);
} else if (afrp->adf_pattern != NULL &&
strncmp(afrp->adf_pattern,
(char *)&infop->awi_info->Name,
sizeof (infop->awi_info->Name))) {
return (ACPIDEV_FILTER_CONTINUE);
}
if (afrp->adf_replace != NULL && devname != NULL) {
(void) strncpy(devname, afrp->adf_replace, len - 1);
devname[len - 1] = 0;
}
return (afrp->adf_retcode);
}
acpidev_filter_result_t
acpidev_filter_device(acpidev_walk_info_t *infop, ACPI_HANDLE hdl,
acpidev_filter_rule_t *afrp, int entries, char *devname, int len)
{
acpidev_filter_result_t res;
/* Evaluate filtering rules. */
for (; entries > 0; entries--, afrp++) {
if (afrp->adf_filter_func != NULL) {
res = afrp->adf_filter_func(infop, hdl, afrp,
devname, len);
} else {
res = acpidev_filter_default(infop, hdl, afrp,
devname, len);
}
if (res == ACPIDEV_FILTER_DEFAULT ||
res == ACPIDEV_FILTER_SCAN) {
infop->awi_class_list = afrp->adf_class_list;
break;
}
}
return (res);
}
dev_info_t *
acpidev_root_node(void)
{
return (acpidev_root_dip);
}
ACPI_STATUS
acpidev_register_class(acpidev_class_list_t **listpp, acpidev_class_t *clsp,
boolean_t tail)
{
ACPI_STATUS rc;
acpidev_class_list_t *item;
acpidev_class_list_t *temp;
ASSERT(clsp != NULL);
ASSERT(listpp != NULL);
if (listpp == NULL || clsp == NULL) {
ACPIDEV_DEBUG(CE_WARN,
"acpidev: invalid parameter in acpidev_register_class().");
return (AE_BAD_PARAMETER);
} else if (clsp->adc_version != ACPIDEV_CLASS_REV) {
cmn_err(CE_WARN,
"!acpidev: class driver %s version mismatch.",
clsp->adc_class_name);
return (AE_BAD_DATA);
}
rc = AE_OK;
item = kmem_zalloc(sizeof (*item), KM_SLEEP);
item->acl_class = clsp;
rw_enter(&acpidev_class_lock, RW_WRITER);
/* Check for duplicated item. */
for (temp = *listpp; temp != NULL; temp = temp->acl_next) {
if (temp->acl_class == clsp) {
cmn_err(CE_WARN,
"!acpidev: register duplicate class driver %s.",
clsp->adc_class_name);
rc = AE_ALREADY_EXISTS;
break;
}
}
if (ACPI_SUCCESS(rc)) {
if (tail) {
while (*listpp) {
listpp = &(*listpp)->acl_next;
}
}
item->acl_next = *listpp;
*listpp = item;
}
rw_exit(&acpidev_class_lock);
if (ACPI_FAILURE(rc)) {
kmem_free(item, sizeof (*item));
}
return (rc);
}
ACPI_STATUS
acpidev_unregister_class(acpidev_class_list_t **listpp,
acpidev_class_t *clsp)
{
ACPI_STATUS rc = AE_NOT_FOUND;
acpidev_class_list_t *temp;
ASSERT(clsp != NULL);
ASSERT(listpp != NULL);
if (listpp == NULL || clsp == NULL) {
ACPIDEV_DEBUG(CE_WARN, "acpidev: invalid parameter "
"in acpidev_unregister_class().");
return (AE_BAD_PARAMETER);
}
rw_enter(&acpidev_class_lock, RW_WRITER);
for (temp = NULL; *listpp; listpp = &(*listpp)->acl_next) {
if ((*listpp)->acl_class == clsp) {
temp = *listpp;
*listpp = (*listpp)->acl_next;
break;
}
}
if (temp == NULL) {
ACPIDEV_DEBUG(CE_WARN, "acpidev: class %p(%s) doesn't exist "
"in acpidev_unregister_class().",
(void *)clsp, clsp->adc_class_name);
rc = AE_NOT_FOUND;
} else if (temp->acl_class->adc_refcnt != 0) {
ACPIDEV_DEBUG(CE_WARN, "acpidev: class %p(%s) is still in use "
"in acpidev_unregister_class()..",
(void *)clsp, clsp->adc_class_name);
rc = AE_ERROR;
} else {
kmem_free(temp, sizeof (*temp));
rc = AE_OK;
}
rw_exit(&acpidev_class_lock);
return (rc);
}