freebsd-skq/sys/dev/isci/scil/scif_sas_domain_states.c
Pedro F. Giffuni 718cf2ccb9 sys/dev: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00

615 lines
20 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* BSD LICENSE
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/**
* @file
*
* @brief This file contains all of the entrance and exit methods for each
* of the domain states defined by the SCI_BASE_DOMAIN state
* machine.
*/
#include <dev/isci/scil/intel_sas.h>
#include <dev/isci/scil/scic_port.h>
#include <dev/isci/scil/scif_sas_logger.h>
#include <dev/isci/scil/scif_sas_domain.h>
#include <dev/isci/scil/scif_sas_controller.h>
#include <dev/isci/scil/scic_controller.h>
//******************************************************************************
//* P R O T E C T E D M E T H O D S
//******************************************************************************
/**
* @brief This method will attempt to transition to the stopped state.
* The transition will only occur if the criteria for transition is
* met (i.e. all IOs are complete and all devices are stopped).
*
* @param[in] fw_domain This parameter specifies the domain in which to
* to attempt to perform the transition.
*
* @return none
*/
void scif_sas_domain_transition_to_stopped_state(
SCIF_SAS_DOMAIN_T * fw_domain
)
{
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_domain),
SCIF_LOG_OBJECT_DOMAIN | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
"scif_sas_domain_transition_to_stopped_state(0x%x) enter\n",
fw_domain
));
// If IOs are quiesced, and all remote devices are stopped,
// then transition directly to the STOPPED state.
if ( (fw_domain->request_list.element_count == 0)
&& (fw_domain->device_start_count == 0) )
{
SCIF_LOG_INFO((
sci_base_object_get_logger(fw_domain),
SCIF_LOG_OBJECT_DOMAIN | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
"Domain:0x%x immediate transition to STOPPED\n",
fw_domain
));
sci_base_state_machine_change_state(
&fw_domain->parent.state_machine, SCI_BASE_DOMAIN_STATE_STOPPED
);
}
}
/**
* @brief This method is called upon entrance to all states where the
* previous state may have been the DISCOVERING state.
* We issue the scif_cb_domain_discovery_complete() notification
* from this method, assuming pre-requisites are met, as opposed
* to in the exit handler of the DISCOVERING state, so that the
* appropriate state handlers are in place should the user decide
* to call scif_domain_discover() again.
*
* @param[in] fw_domain This parameter specifies the domain for which
* the state transition has occurred.
*
* @return none
*/
static
void scif_sas_domain_transition_from_discovering_state(
SCIF_SAS_DOMAIN_T * fw_domain
)
{
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_domain),
SCIF_LOG_OBJECT_DOMAIN | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
"scif_sas_domain_transition_from_discovering_state(0x%x) enter\n",
fw_domain
));
if (fw_domain->parent.state_machine.previous_state_id
== SCI_BASE_DOMAIN_STATE_DISCOVERING)
{
scif_sas_controller_restore_interrupt_coalescence(fw_domain->controller);
scif_cb_timer_stop(fw_domain->controller, fw_domain->operation.timer);
scif_cb_domain_discovery_complete(
fw_domain->controller, fw_domain, fw_domain->operation.status
);
}
}
/**
* @brief This method is called upon entrance to DISCOVERING state. Right before
* transitioning to DISCOVERING state, we temporarily change interrupt
* coalescence scheme.
*
* @param[in] fw_domain This parameter specifies the domain for which
* the state transition has occurred.
*
* @return none
*/
void scif_sas_domain_transition_to_discovering_state(
SCIF_SAS_DOMAIN_T * fw_domain
)
{
scif_sas_controller_save_interrupt_coalescence(fw_domain->controller);
sci_base_state_machine_change_state(
&fw_domain->parent.state_machine, SCI_BASE_DOMAIN_STATE_DISCOVERING
);
}
/**
* @brief This method implements the actions taken when entering the
* INITIAL state.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_DOMAIN object in the method implementation.
*
* @return none
*/
static
void scif_sas_domain_initial_state_enter(
SCI_BASE_OBJECT_T * object
)
{
SCIF_SAS_DOMAIN_T * fw_domain = (SCIF_SAS_DOMAIN_T *)object;
SET_STATE_HANDLER(
fw_domain,
scif_sas_domain_state_handler_table,
SCI_BASE_DOMAIN_STATE_INITIAL
);
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_domain),
SCIF_LOG_OBJECT_DOMAIN,
"scif_sas_domain_initial_state_enter(0x%x) enter\n",
fw_domain
));
}
/**
* @brief This method implements the actions taken when entering the
* STARTING state. This includes setting the state handlers and
* checking to see if the core port has already become READY.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_DOMAIN object in the method implementation.
*
* @return none
*/
static
void scif_sas_domain_starting_state_enter(
SCI_BASE_OBJECT_T * object
)
{
SCIF_SAS_DOMAIN_T * fw_domain = (SCIF_SAS_DOMAIN_T *)object;
SET_STATE_HANDLER(
fw_domain,
scif_sas_domain_state_handler_table,
SCI_BASE_DOMAIN_STATE_STARTING
);
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_domain),
SCIF_LOG_OBJECT_DOMAIN | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
"scif_sas_domain_starting_state_enter(0x%x) enter\n",
fw_domain
));
scif_sas_domain_transition_from_discovering_state(fw_domain);
// If we entered the STARTING state and the core port is actually ready,
// then directly transition into the READY state. This can occur
// if we were in the middle of discovery when the port failed
// (causing a transition to STOPPING), then before reaching STOPPED
// the port becomes ready again.
if (fw_domain->is_port_ready == TRUE)
{
sci_base_state_machine_change_state(
&fw_domain->parent.state_machine, SCI_BASE_DOMAIN_STATE_READY
);
}
}
/**
* @brief This method implements the actions taken when entering the
* READY state. If the transition into this state came from:
* - the STARTING state, then alert the user via a
* scif_cb_domain_change_notification() that the domain
* has at least 1 device ready for discovery.
* - the DISCOVERING state, then alert the user that
* discovery is complete via the
* scif_cb_domain_discovery_complete() notification that
* discovery is finished.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_DOMAIN object in the method implementation.
*
* @return none
*/
static
void scif_sas_domain_ready_state_enter(
SCI_BASE_OBJECT_T * object
)
{
SCIF_SAS_DOMAIN_T * fw_domain = (SCIF_SAS_DOMAIN_T *)object;
SET_STATE_HANDLER(
fw_domain,
scif_sas_domain_state_handler_table,
SCI_BASE_DOMAIN_STATE_READY
);
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_domain),
SCIF_LOG_OBJECT_DOMAIN | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
"scif_sas_domain_ready_state_enter(0x%x) enter\n",
fw_domain
));
if (fw_domain->parent.state_machine.previous_state_id
== SCI_BASE_DOMAIN_STATE_STARTING)
{
scif_cb_domain_ready(fw_domain->controller, fw_domain);
// Only indicate the domain change notification if the previous
// state was the STARTING state. We issue the notification here
// as opposed to exit of the STARTING state so that the appropriate
// state handlers are in place should the user call
// scif_domain_discover() from scif_cb_domain_change_notification()
scif_cb_domain_change_notification(fw_domain->controller, fw_domain);
}
else if (fw_domain->parent.state_machine.previous_state_id
== SCI_BASE_DOMAIN_STATE_DISCOVERING)
{
//if domain discovery timed out, we will NOT go back to discover even
//the broadcast change count is not zero. Instead we finish the discovery
//back to user. User can check the operation status and decide to
//retry discover all over again.
if (fw_domain->operation.status == SCI_FAILURE_TIMEOUT)
fw_domain->broadcast_change_count = 0;
// Check the broadcast change count to determine if discovery
// is indeed complete.
if (fw_domain->broadcast_change_count == 0)
{
scif_sas_domain_transition_from_discovering_state(fw_domain);
scif_cb_domain_ready(fw_domain->controller, fw_domain);
}
else
{
// The broadcast change count indicates something my have
// changed in the domain, while a discovery was ongoing.
// Thus, we should start discovery over again.
sci_base_state_machine_change_state(
&fw_domain->parent.state_machine, SCI_BASE_DOMAIN_STATE_DISCOVERING
);
}
// Enable the BCN because underneath hardware may disabled any further
// BCN.
scic_port_enable_broadcast_change_notification(fw_domain->core_object);
}
}
/**
* @brief This method implements the actions taken when exiting the
* READY state.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_DOMAIN object in the method implementation.
*
* @return none
*/
static
void scif_sas_domain_ready_state_exit(
SCI_BASE_OBJECT_T * object
)
{
SCIF_SAS_DOMAIN_T * fw_domain = (SCIF_SAS_DOMAIN_T *)object;
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_domain),
SCIF_LOG_OBJECT_DOMAIN | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
"scif_sas_domain_ready_state_exit(0x%x) enter\n",
fw_domain
));
scif_cb_domain_not_ready(fw_domain->controller, fw_domain);
}
/**
* @brief This method implements the actions taken when entering the
* STOPPING state.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_DOMAIN object in the method implementation.
*
* @return none
*/
static
void scif_sas_domain_stopping_state_enter(
SCI_BASE_OBJECT_T * object
)
{
SCIF_SAS_REMOTE_DEVICE_T * fw_device;
SCIF_SAS_DOMAIN_T * fw_domain = (SCIF_SAS_DOMAIN_T *)object;
SCI_ABSTRACT_ELEMENT_T * element = sci_abstract_list_get_front(
&fw_domain->remote_device_list
);
SET_STATE_HANDLER(
fw_domain,
scif_sas_domain_state_handler_table,
SCI_BASE_DOMAIN_STATE_STOPPING
);
// This must be invoked after the state handlers are set to ensure
// appropriate processing will occur if the user attempts to perform
// additional actions.
scif_sas_domain_transition_from_discovering_state(fw_domain);
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_domain),
SCIF_LOG_OBJECT_DOMAIN | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
"scif_sas_domain_stopping_state_enter(0x%x) enter\n",
fw_domain
));
scif_sas_high_priority_request_queue_purge_domain(
&fw_domain->controller->hprq, fw_domain
);
// Search the domain's list of devices and put them all in the STOPPING
// state.
while (element != NULL)
{
fw_device = (SCIF_SAS_REMOTE_DEVICE_T*)
sci_abstract_list_get_object(element);
// This method will stop the core device. The core will terminate
// all IO requests currently outstanding.
fw_device->state_handlers->parent.stop_handler(&fw_device->parent);
element = sci_abstract_list_get_next(element);
}
// Attempt to transition to the stopped state.
scif_sas_domain_transition_to_stopped_state(fw_domain);
}
/**
* @brief This method implements the actions taken when entering the
* STOPPED state.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_DOMAIN object in the method implementation.
*
* @return none
*/
static
void scif_sas_domain_stopped_state_enter(
SCI_BASE_OBJECT_T * object
)
{
SCIF_SAS_DOMAIN_T * fw_domain = (SCIF_SAS_DOMAIN_T *)object;
SET_STATE_HANDLER(
fw_domain,
scif_sas_domain_state_handler_table,
SCI_BASE_DOMAIN_STATE_STOPPED
);
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_domain),
SCIF_LOG_OBJECT_DOMAIN | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
"scif_sas_domain_stopped_state_enter(0x%x) enter\n",
fw_domain
));
// A hot unplug of the direct attached device has occurred. Thus,
// notify the user. Note, if the controller is not in READY state,
// mostly likely the controller is in STOPPING or STOPPED state,
// meaning the controller is in the process of stopping, we should
// not call back to user in the middle of controller stopping.
if(fw_domain->controller->parent.state_machine.current_state_id
== SCI_BASE_CONTROLLER_STATE_READY)
scif_cb_domain_change_notification(fw_domain->controller, fw_domain);
}
/**
* @brief This method implements the actions taken when entering the
* DISCOVERING state. This includes determining from which
* state we entered. If we entered from stopping that some sort
* of hot-remove of the port occurred. In the hot-remove case
* all devices should be in the STOPPED state already and, as
* a result, are removed from the domain with a notification sent
* to the framework user.
*
* @note This method currently only handles hot-insert/hot-remove of
* direct attached SSP devices.
*
* @param[in] object This parameter specifies the base object for which
* the state transition is occurring. This is cast into a
* SCIF_SAS_DOMAIN object in the method implementation.
*
* @return none
*/
static
void scif_sas_domain_discovering_state_enter(
SCI_BASE_OBJECT_T * object
)
{
SCIF_SAS_DOMAIN_T * fw_domain = (SCIF_SAS_DOMAIN_T *)object;
SET_STATE_HANDLER(
fw_domain,
scif_sas_domain_state_handler_table,
SCI_BASE_DOMAIN_STATE_DISCOVERING
);
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_domain),
SCIF_LOG_OBJECT_DOMAIN | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
"scif_sas_domain_discovering_state_enter(0x%x) enter\n",
fw_domain
));
fw_domain->broadcast_change_count = 0;
// Did the domain just go through a port not ready action? If it did,
// then we will be entering from the STOPPED state.
if (fw_domain->parent.state_machine.previous_state_id
!= SCI_BASE_DOMAIN_STATE_STOPPED)
{
SCIF_SAS_REMOTE_DEVICE_T * remote_device;
SCIC_PORT_PROPERTIES_T properties;
scic_port_get_properties(fw_domain->core_object, &properties);
// If the device has not yet been added to the domain, then
// inform the user that the device is new.
remote_device = (SCIF_SAS_REMOTE_DEVICE_T *)
scif_domain_get_device_by_sas_address(
fw_domain, &properties.remote.sas_address
);
if (remote_device == SCI_INVALID_HANDLE)
{
// simply notify the user of the new DA device and be done
// with discovery.
scif_cb_domain_da_device_added(
fw_domain->controller,
fw_domain,
&properties.remote.sas_address,
&properties.remote.protocols
);
}
else
{
if(properties.remote.protocols.u.bits.smp_target)
//kick off the smp discover process.
scif_sas_domain_start_smp_discover(fw_domain, remote_device);
}
}
else //entered from STOPPED state.
{
SCI_ABSTRACT_ELEMENT_T * current_element =
sci_abstract_list_get_front(&(fw_domain->remote_device_list) );
SCIF_SAS_REMOTE_DEVICE_T * fw_device;
while (current_element != NULL)
{
fw_device = (SCIF_SAS_REMOTE_DEVICE_T *)
sci_abstract_list_get_object(current_element);
ASSERT(fw_device->parent.state_machine.current_state_id
== SCI_BASE_REMOTE_DEVICE_STATE_STOPPED);
current_element =
sci_abstract_list_get_next(current_element);
SCIF_LOG_INFO((
sci_base_object_get_logger(fw_domain),
SCIF_LOG_OBJECT_DOMAIN | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
"Controller:0x%x Domain:0x%x Device:0x%x removed\n",
fw_domain->controller, fw_domain, fw_device
));
// Notify the framework user of the device removal.
scif_cb_domain_device_removed(
fw_domain->controller, fw_domain, fw_device
);
}
ASSERT(fw_domain->request_list.element_count == 0);
ASSERT(sci_abstract_list_size(&fw_domain->remote_device_list) == 0);
sci_base_state_machine_change_state(
&fw_domain->parent.state_machine, SCI_BASE_DOMAIN_STATE_STARTING
);
}
}
SCI_BASE_STATE_T scif_sas_domain_state_table[SCI_BASE_DOMAIN_MAX_STATES] =
{
{
SCI_BASE_DOMAIN_STATE_INITIAL,
scif_sas_domain_initial_state_enter,
NULL,
},
{
SCI_BASE_DOMAIN_STATE_STARTING,
scif_sas_domain_starting_state_enter,
NULL,
},
{
SCI_BASE_DOMAIN_STATE_READY,
scif_sas_domain_ready_state_enter,
scif_sas_domain_ready_state_exit,
},
{
SCI_BASE_DOMAIN_STATE_STOPPING,
scif_sas_domain_stopping_state_enter,
NULL,
},
{
SCI_BASE_DOMAIN_STATE_STOPPED,
scif_sas_domain_stopped_state_enter,
NULL,
},
{
SCI_BASE_DOMAIN_STATE_DISCOVERING,
scif_sas_domain_discovering_state_enter,
NULL,
}
};