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| Current File : //sys/dev/isci/scil/scif_sas_smp_phy.c |
/*-
* 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: release/9.1.0/sys/dev/isci/scil/scif_sas_smp_phy.c 231689 2012-02-14 15:58:49Z jimharris $");
/**
* @file
*
* @brief This file contains the implementation of the SCIF_SAS_SMP_PHY
* object.
*/
#include <dev/isci/scil/scif_sas_controller.h>
#include <dev/isci/scil/scif_sas_smp_phy.h>
#include <dev/isci/scil/scif_sas_smp_remote_device.h>
//******************************************************************************
//*
//* P U B L I C M E T H O D S
//*
//******************************************************************************
/**
* @brief This routine constructs a smp phy object for an expander phy and insert
* to owning expander device's smp_phy_list.
* @param[in] this_smp_phy The memory space to store a phy
* @param[in] owning_device The smp remote device that owns this smp phy.
* @param[in] expander_phy_id The expander phy id for this_smp_phy.
* @return None
*/
void scif_sas_smp_phy_construct(
SCIF_SAS_SMP_PHY_T * this_smp_phy,
SCIF_SAS_REMOTE_DEVICE_T * owning_device,
U8 expander_phy_id
)
{
memset(this_smp_phy, 0, sizeof(SCIF_SAS_SMP_PHY_T));
this_smp_phy->phy_identifier = expander_phy_id;
this_smp_phy->owning_device = owning_device;
sci_fast_list_element_init((this_smp_phy), (&this_smp_phy->list_element));
//insert to owning device's smp phy list.
sci_fast_list_insert_tail(
(&owning_device->protocol_device.smp_device.smp_phy_list),
(&this_smp_phy->list_element)
);
}
/**
* @brief This routine destructs a smp phy object for an expander phy and free the smp
* phy to controller's smp phy memory.
* @param[in] this_smp_phy The smp phy to be destructed.
*
* @return None
*/
void scif_sas_smp_phy_destruct(
SCIF_SAS_SMP_PHY_T * this_smp_phy
)
{
SCIF_SAS_REMOTE_DEVICE_T * owning_device = this_smp_phy->owning_device;
SCIF_SAS_CONTROLLER_T * fw_controller = owning_device->domain->controller;
if ( ( this_smp_phy->attached_device_type == SMP_EDGE_EXPANDER_DEVICE
|| this_smp_phy->attached_device_type == SMP_FANOUT_EXPANDER_DEVICE)
&& this_smp_phy->u.attached_phy != NULL )
{
//update the counterpart phy from the other smp phy list.
this_smp_phy->u.attached_phy->attached_device_type = SMP_NO_DEVICE_ATTACHED;
this_smp_phy->u.attached_phy->u.attached_phy = NULL;
}
//remove curr_smp_phy
sci_fast_list_remove_element(&this_smp_phy->list_element);
scif_sas_controller_free_smp_phy(fw_controller, this_smp_phy);
}
/**
* @brief This routine save a smp phy information based on discover response.
*
* @param[in] this_smp_phy The memory space to store a phy
* @param[in] attached_device A possible direct attached device to this phy.
*
* @param[in] discover_response The smp DISCOVER response for this_smp_phy.
* @return None
*/
void scif_sas_smp_phy_save_information(
SCIF_SAS_SMP_PHY_T * this_smp_phy,
SCIF_SAS_REMOTE_DEVICE_T * attached_device,
SMP_RESPONSE_DISCOVER_T * discover_response
)
{
ASSERT (this_smp_phy->owning_device != NULL);
ASSERT (this_smp_phy->phy_identifier == discover_response->phy_identifier);
this_smp_phy->attached_device_type = (U8)discover_response->u2.sas1_1.attached_device_type;
this_smp_phy->routing_attribute = (U8)discover_response->routing_attribute;
this_smp_phy->attached_sas_address = discover_response->attached_sas_address;
this_smp_phy->config_route_table_index_anchor = 0;
if (this_smp_phy->attached_device_type != SMP_EDGE_EXPANDER_DEVICE
&& this_smp_phy->attached_device_type != SMP_FANOUT_EXPANDER_DEVICE)
{
//note, end_device field could be an end device, or a NULL value, but can't be expander device.
this_smp_phy->u.end_device = attached_device;
}
else
{
//if attached device type is expander, we will set u.attached_phy later when the
//the attached expander finish its discover on attached_phy.
;
}
}
/**
* @brief This routine constructs a smp phy object for an expander phy.
* @param[in] this_smp_phy The memory space to store a phy
* @param[in] owning_device The smp remote device that owns this smp phy.
* @param[in] discover_response The smp DISCOVER response for this_smp_phy.
*
* @return Whether a smp phy has an attached phy and the pair of phy are set
* set to each other as attached phy successfully.
*/
SCI_STATUS scif_sas_smp_phy_set_attached_phy(
SCIF_SAS_SMP_PHY_T * this_smp_phy,
U8 attached_phy_identifier,
SCIF_SAS_REMOTE_DEVICE_T * attached_remote_device
)
{
//find the attached phy from its owning device by attached_phy_id.
SCIF_SAS_SMP_PHY_T * attached_smp_phy =
(SCIF_SAS_SMP_PHY_T *)scif_sas_smp_remote_device_find_smp_phy_by_id(
attached_phy_identifier,
&attached_remote_device->protocol_device.smp_device);
if (attached_smp_phy != NULL)
{
this_smp_phy->u.attached_phy = attached_smp_phy;
attached_smp_phy->u.attached_phy = this_smp_phy;
return SCI_SUCCESS;
}
return SCI_FAILURE;
}
/**
* @brief This method verify the routing attributes of a phy connection per
* specification.
*
* @param[in] this_smp_phy One smp phy belongs to a smp phy connection.
* @param[in] attached_smp_phy One smp phy belongs to a smp phy connection.
*
* @return Whether routing attributes of a phy connection is legal.
* @retval SCI_SUCCESS indicates a good phy connection.
* SCI_FAILURE indicates a illegal phy connection.
*/
SCI_STATUS scif_sas_smp_phy_verify_routing_attribute(
SCIF_SAS_SMP_PHY_T * this_smp_phy,
SCIF_SAS_SMP_PHY_T * attached_smp_phy
)
{
SCI_STATUS status = SCI_SUCCESS;
//expander phy with direct routing attribute can only connect to
//phy with direct routing attribute.
if ( this_smp_phy->routing_attribute == DIRECT_ROUTING_ATTRIBUTE
|| attached_smp_phy->routing_attribute == DIRECT_ROUTING_ATTRIBUTE )
{
if ( (this_smp_phy->routing_attribute | attached_smp_phy->routing_attribute)
!= DIRECT_ROUTING_ATTRIBUTE )
status = SCI_FAILURE;
}
if (this_smp_phy->routing_attribute == TABLE_ROUTING_ATTRIBUTE
&& attached_smp_phy->routing_attribute == TABLE_ROUTING_ATTRIBUTE)
{
if ( ! this_smp_phy->owning_device->protocol_device.smp_device.is_table_to_table_supported
|| !attached_smp_phy->owning_device->protocol_device.smp_device.is_table_to_table_supported )
status = SCI_FAILURE;
}
return status;
}
/**
* @brief This method find The next smp phy that is in the smp phy list and
* resides in the same wide port as this_smp_phy.
*
* @param[in] this_smp_phy The smp phy whose neighbor phy that is in the same
* same wide port is to be find.
*
* @return The next smp phy that is in the smp phy list and resides in the same
* wide port as this_smp_phy.
*/
SCIF_SAS_SMP_PHY_T * scif_sas_smp_phy_find_next_phy_in_wide_port(
SCIF_SAS_SMP_PHY_T * this_smp_phy
)
{
SCI_FAST_LIST_ELEMENT_T * next_phy_element = sci_fast_list_get_next(
&(this_smp_phy->list_element) );
SCIF_SAS_SMP_PHY_T * next_phy;
while (next_phy_element != NULL)
{
next_phy = (SCIF_SAS_SMP_PHY_T *)sci_fast_list_get_object(next_phy_element);
next_phy_element = sci_fast_list_get_next( &(next_phy->list_element));
if (next_phy->attached_sas_address.high == this_smp_phy->attached_sas_address.high
&&next_phy->attached_sas_address.low == this_smp_phy->attached_sas_address.low)
return next_phy;
}
return NULL;
}
/**
* @brief This method find the smp phy that resides in the middle of the same
* wide port as this_smp_phy.
*
* @param[in] this_smp_phy The smp phy who is the lowest order phy in a wide
* port .
*
* @return The next smp phy that is in the smp phy list and resides in the same
* wide port as this_smp_phy.
*/
SCIF_SAS_SMP_PHY_T * scif_sas_smp_phy_find_middle_phy_in_wide_port(
SCIF_SAS_SMP_PHY_T * this_smp_phy
)
{
SCIF_SAS_SMP_PHY_T * next_phy =
scif_sas_smp_phy_find_next_phy_in_wide_port(this_smp_phy);
SCIF_SAS_SMP_PHY_T * middle_phy = this_smp_phy;
//currently we assume a wide port could not be wider than X4. so the
//second phy is always the correct answer for x2, x3 or x4 wide port.
//For a narrow port, phy0 is the middle phy.
if (next_phy != NULL)
{
middle_phy = next_phy;
next_phy =
scif_sas_smp_phy_find_next_phy_in_wide_port(next_phy);
}
if (next_phy != NULL)
middle_phy = next_phy;
return middle_phy;
}
/**
* @brief This method find the smp phy that is the hishest order phy
* in the same wide port as this_smp_phy.
*
* @param[in] this_smp_phy The smp phy who is the lowest order phy in a wide
* port.
*
* @return The next smp phy that is in the smp phy list and resides in the same
* wide port as this_smp_phy.
*/
SCIF_SAS_SMP_PHY_T * scif_sas_smp_phy_find_highest_phy_in_wide_port(
SCIF_SAS_SMP_PHY_T * this_smp_phy
)
{
SCIF_SAS_SMP_PHY_T * next_phy =
scif_sas_smp_phy_find_next_phy_in_wide_port(this_smp_phy);
SCIF_SAS_SMP_PHY_T * highest_phy = this_smp_phy;
while(next_phy != NULL )
{
highest_phy = next_phy;
next_phy =
scif_sas_smp_phy_find_next_phy_in_wide_port(next_phy);
}
return highest_phy;
}