linux/drivers/scsi/isci/port_config.c
Marcin Tomczak be77834181 [SCSI] isci: fix io failures while wide port links are coming up
When the first phy of a wide port comes up, don't report the port ready
yet, always wait for 250 miliseconds then config the port with all phys
added to the port. So that we can avoid reporting wide port device too
early to kernel, which caused the first IOs (report luns, inquirys)
failed due to not all the phys are configured into its port. Changes
also made that the phys in a wide port don't need to go through half
second wait time for consuming power.

Signed-off-by: Marcin Tomczak <marcin.tomczak@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-01-16 11:46:59 +04:00

764 lines
25 KiB
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.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 "host.h"
#define SCIC_SDS_MPC_RECONFIGURATION_TIMEOUT (10)
#define SCIC_SDS_APC_RECONFIGURATION_TIMEOUT (10)
#define SCIC_SDS_APC_WAIT_LINK_UP_NOTIFICATION (250)
enum SCIC_SDS_APC_ACTIVITY {
SCIC_SDS_APC_SKIP_PHY,
SCIC_SDS_APC_ADD_PHY,
SCIC_SDS_APC_START_TIMER,
SCIC_SDS_APC_ACTIVITY_MAX
};
/*
* ******************************************************************************
* General port configuration agent routines
* ****************************************************************************** */
/**
*
* @address_one: A SAS Address to be compared.
* @address_two: A SAS Address to be compared.
*
* Compare the two SAS Address and if SAS Address One is greater than SAS
* Address Two then return > 0 else if SAS Address One is less than SAS Address
* Two return < 0 Otherwise they are the same return 0 A signed value of x > 0
* > y where x is returned for Address One > Address Two y is returned for
* Address One < Address Two 0 is returned ofr Address One = Address Two
*/
static s32 sci_sas_address_compare(
struct sci_sas_address address_one,
struct sci_sas_address address_two)
{
if (address_one.high > address_two.high) {
return 1;
} else if (address_one.high < address_two.high) {
return -1;
} else if (address_one.low > address_two.low) {
return 1;
} else if (address_one.low < address_two.low) {
return -1;
}
/* The two SAS Address must be identical */
return 0;
}
/**
*
* @controller: The controller object used for the port search.
* @phy: The phy object to match.
*
* This routine will find a matching port for the phy. This means that the
* port and phy both have the same broadcast sas address and same received sas
* address. The port address or the NULL if there is no matching
* port. port address if the port can be found to match the phy.
* NULL if there is no matching port for the phy.
*/
static struct isci_port *sci_port_configuration_agent_find_port(
struct isci_host *ihost,
struct isci_phy *iphy)
{
u8 i;
struct sci_sas_address port_sas_address;
struct sci_sas_address port_attached_device_address;
struct sci_sas_address phy_sas_address;
struct sci_sas_address phy_attached_device_address;
/*
* Since this phy can be a member of a wide port check to see if one or
* more phys match the sent and received SAS address as this phy in which
* case it should participate in the same port.
*/
sci_phy_get_sas_address(iphy, &phy_sas_address);
sci_phy_get_attached_sas_address(iphy, &phy_attached_device_address);
for (i = 0; i < ihost->logical_port_entries; i++) {
struct isci_port *iport = &ihost->ports[i];
sci_port_get_sas_address(iport, &port_sas_address);
sci_port_get_attached_sas_address(iport, &port_attached_device_address);
if (sci_sas_address_compare(port_sas_address, phy_sas_address) == 0 &&
sci_sas_address_compare(port_attached_device_address, phy_attached_device_address) == 0)
return iport;
}
return NULL;
}
/**
*
* @controller: This is the controller object that contains the port agent
* @port_agent: This is the port configruation agent for the controller.
*
* This routine will validate the port configuration is correct for the SCU
* hardware. The SCU hardware allows for port configurations as follows. LP0
* -> (PE0), (PE0, PE1), (PE0, PE1, PE2, PE3) LP1 -> (PE1) LP2 -> (PE2), (PE2,
* PE3) LP3 -> (PE3) enum sci_status SCI_SUCCESS the port configuration is valid for
* this port configuration agent. SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION
* the port configuration is not valid for this port configuration agent.
*/
static enum sci_status sci_port_configuration_agent_validate_ports(
struct isci_host *ihost,
struct sci_port_configuration_agent *port_agent)
{
struct sci_sas_address first_address;
struct sci_sas_address second_address;
/*
* Sanity check the max ranges for all the phys the max index
* is always equal to the port range index */
if (port_agent->phy_valid_port_range[0].max_index != 0 ||
port_agent->phy_valid_port_range[1].max_index != 1 ||
port_agent->phy_valid_port_range[2].max_index != 2 ||
port_agent->phy_valid_port_range[3].max_index != 3)
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
/*
* This is a request to configure a single x4 port or at least attempt
* to make all the phys into a single port */
if (port_agent->phy_valid_port_range[0].min_index == 0 &&
port_agent->phy_valid_port_range[1].min_index == 0 &&
port_agent->phy_valid_port_range[2].min_index == 0 &&
port_agent->phy_valid_port_range[3].min_index == 0)
return SCI_SUCCESS;
/*
* This is a degenerate case where phy 1 and phy 2 are assigned
* to the same port this is explicitly disallowed by the hardware
* unless they are part of the same x4 port and this condition was
* already checked above. */
if (port_agent->phy_valid_port_range[2].min_index == 1) {
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
/*
* PE0 and PE3 can never have the same SAS Address unless they
* are part of the same x4 wide port and we have already checked
* for this condition. */
sci_phy_get_sas_address(&ihost->phys[0], &first_address);
sci_phy_get_sas_address(&ihost->phys[3], &second_address);
if (sci_sas_address_compare(first_address, second_address) == 0) {
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
/*
* PE0 and PE1 are configured into a 2x1 ports make sure that the
* SAS Address for PE0 and PE2 are different since they can not be
* part of the same port. */
if (port_agent->phy_valid_port_range[0].min_index == 0 &&
port_agent->phy_valid_port_range[1].min_index == 1) {
sci_phy_get_sas_address(&ihost->phys[0], &first_address);
sci_phy_get_sas_address(&ihost->phys[2], &second_address);
if (sci_sas_address_compare(first_address, second_address) == 0) {
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
}
/*
* PE2 and PE3 are configured into a 2x1 ports make sure that the
* SAS Address for PE1 and PE3 are different since they can not be
* part of the same port. */
if (port_agent->phy_valid_port_range[2].min_index == 2 &&
port_agent->phy_valid_port_range[3].min_index == 3) {
sci_phy_get_sas_address(&ihost->phys[1], &first_address);
sci_phy_get_sas_address(&ihost->phys[3], &second_address);
if (sci_sas_address_compare(first_address, second_address) == 0) {
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
}
return SCI_SUCCESS;
}
/*
* ******************************************************************************
* Manual port configuration agent routines
* ****************************************************************************** */
/* verify all of the phys in the same port are using the same SAS address */
static enum sci_status
sci_mpc_agent_validate_phy_configuration(struct isci_host *ihost,
struct sci_port_configuration_agent *port_agent)
{
u32 phy_mask;
u32 assigned_phy_mask;
struct sci_sas_address sas_address;
struct sci_sas_address phy_assigned_address;
u8 port_index;
u8 phy_index;
assigned_phy_mask = 0;
sas_address.high = 0;
sas_address.low = 0;
for (port_index = 0; port_index < SCI_MAX_PORTS; port_index++) {
phy_mask = ihost->oem_parameters.ports[port_index].phy_mask;
if (!phy_mask)
continue;
/*
* Make sure that one or more of the phys were not already assinged to
* a different port. */
if ((phy_mask & ~assigned_phy_mask) == 0) {
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
/* Find the starting phy index for this round through the loop */
for (phy_index = 0; phy_index < SCI_MAX_PHYS; phy_index++) {
if ((phy_mask & (1 << phy_index)) == 0)
continue;
sci_phy_get_sas_address(&ihost->phys[phy_index],
&sas_address);
/*
* The phy_index can be used as the starting point for the
* port range since the hardware starts all logical ports
* the same as the PE index. */
port_agent->phy_valid_port_range[phy_index].min_index = port_index;
port_agent->phy_valid_port_range[phy_index].max_index = phy_index;
if (phy_index != port_index) {
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
break;
}
/*
* See how many additional phys are being added to this logical port.
* Note: We have not moved the current phy_index so we will actually
* compare the startting phy with itself.
* This is expected and required to add the phy to the port. */
while (phy_index < SCI_MAX_PHYS) {
if ((phy_mask & (1 << phy_index)) == 0)
continue;
sci_phy_get_sas_address(&ihost->phys[phy_index],
&phy_assigned_address);
if (sci_sas_address_compare(sas_address, phy_assigned_address) != 0) {
/*
* The phy mask specified that this phy is part of the same port
* as the starting phy and it is not so fail this configuration */
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
port_agent->phy_valid_port_range[phy_index].min_index = port_index;
port_agent->phy_valid_port_range[phy_index].max_index = phy_index;
sci_port_add_phy(&ihost->ports[port_index],
&ihost->phys[phy_index]);
assigned_phy_mask |= (1 << phy_index);
}
phy_index++;
}
return sci_port_configuration_agent_validate_ports(ihost, port_agent);
}
static void mpc_agent_timeout(unsigned long data)
{
u8 index;
struct sci_timer *tmr = (struct sci_timer *)data;
struct sci_port_configuration_agent *port_agent;
struct isci_host *ihost;
unsigned long flags;
u16 configure_phy_mask;
port_agent = container_of(tmr, typeof(*port_agent), timer);
ihost = container_of(port_agent, typeof(*ihost), port_agent);
spin_lock_irqsave(&ihost->scic_lock, flags);
if (tmr->cancel)
goto done;
port_agent->timer_pending = false;
/* Find the mask of phys that are reported read but as yet unconfigured into a port */
configure_phy_mask = ~port_agent->phy_configured_mask & port_agent->phy_ready_mask;
for (index = 0; index < SCI_MAX_PHYS; index++) {
struct isci_phy *iphy = &ihost->phys[index];
if (configure_phy_mask & (1 << index)) {
port_agent->link_up_handler(ihost, port_agent,
phy_get_non_dummy_port(iphy),
iphy);
}
}
done:
spin_unlock_irqrestore(&ihost->scic_lock, flags);
}
static void sci_mpc_agent_link_up(struct isci_host *ihost,
struct sci_port_configuration_agent *port_agent,
struct isci_port *iport,
struct isci_phy *iphy)
{
/* If the port is NULL then the phy was not assigned to a port.
* This is because the phy was not given the same SAS Address as
* the other PHYs in the port.
*/
if (!iport)
return;
port_agent->phy_ready_mask |= (1 << iphy->phy_index);
sci_port_link_up(iport, iphy);
if ((iport->active_phy_mask & (1 << iphy->phy_index)))
port_agent->phy_configured_mask |= (1 << iphy->phy_index);
}
/**
*
* @controller: This is the controller object that receives the link down
* notification.
* @port: This is the port object associated with the phy. If the is no
* associated port this is an NULL. The port is an invalid
* handle only if the phy was never port of this port. This happens when
* the phy is not broadcasting the same SAS address as the other phys in the
* assigned port.
* @phy: This is the phy object which has gone link down.
*
* This function handles the manual port configuration link down notifications.
* Since all ports and phys are associated at initialization time we just turn
* around and notifiy the port object of the link down event. If this PHY is
* not associated with a port there is no action taken. Is it possible to get a
* link down notification from a phy that has no assocoated port?
*/
static void sci_mpc_agent_link_down(
struct isci_host *ihost,
struct sci_port_configuration_agent *port_agent,
struct isci_port *iport,
struct isci_phy *iphy)
{
if (iport != NULL) {
/*
* If we can form a new port from the remainder of the phys
* then we want to start the timer to allow the SCI User to
* cleanup old devices and rediscover the port before
* rebuilding the port with the phys that remain in the ready
* state.
*/
port_agent->phy_ready_mask &= ~(1 << iphy->phy_index);
port_agent->phy_configured_mask &= ~(1 << iphy->phy_index);
/*
* Check to see if there are more phys waiting to be
* configured into a port. If there are allow the SCI User
* to tear down this port, if necessary, and then reconstruct
* the port after the timeout.
*/
if ((port_agent->phy_configured_mask == 0x0000) &&
(port_agent->phy_ready_mask != 0x0000) &&
!port_agent->timer_pending) {
port_agent->timer_pending = true;
sci_mod_timer(&port_agent->timer,
SCIC_SDS_MPC_RECONFIGURATION_TIMEOUT);
}
sci_port_link_down(iport, iphy);
}
}
/* verify phys are assigned a valid SAS address for automatic port
* configuration mode.
*/
static enum sci_status
sci_apc_agent_validate_phy_configuration(struct isci_host *ihost,
struct sci_port_configuration_agent *port_agent)
{
u8 phy_index;
u8 port_index;
struct sci_sas_address sas_address;
struct sci_sas_address phy_assigned_address;
phy_index = 0;
while (phy_index < SCI_MAX_PHYS) {
port_index = phy_index;
/* Get the assigned SAS Address for the first PHY on the controller. */
sci_phy_get_sas_address(&ihost->phys[phy_index],
&sas_address);
while (++phy_index < SCI_MAX_PHYS) {
sci_phy_get_sas_address(&ihost->phys[phy_index],
&phy_assigned_address);
/* Verify each of the SAS address are all the same for every PHY */
if (sci_sas_address_compare(sas_address, phy_assigned_address) == 0) {
port_agent->phy_valid_port_range[phy_index].min_index = port_index;
port_agent->phy_valid_port_range[phy_index].max_index = phy_index;
} else {
port_agent->phy_valid_port_range[phy_index].min_index = phy_index;
port_agent->phy_valid_port_range[phy_index].max_index = phy_index;
break;
}
}
}
return sci_port_configuration_agent_validate_ports(ihost, port_agent);
}
/*
* This routine will restart the automatic port configuration timeout
* timer for the next time period. This could be caused by either a link
* down event or a link up event where we can not yet tell to which a phy
* belongs.
*/
static void sci_apc_agent_start_timer(
struct sci_port_configuration_agent *port_agent,
u32 timeout)
{
if (port_agent->timer_pending)
sci_del_timer(&port_agent->timer);
port_agent->timer_pending = true;
sci_mod_timer(&port_agent->timer, timeout);
}
static void sci_apc_agent_configure_ports(struct isci_host *ihost,
struct sci_port_configuration_agent *port_agent,
struct isci_phy *iphy,
bool start_timer)
{
u8 port_index;
enum sci_status status;
struct isci_port *iport;
enum SCIC_SDS_APC_ACTIVITY apc_activity = SCIC_SDS_APC_SKIP_PHY;
iport = sci_port_configuration_agent_find_port(ihost, iphy);
if (iport) {
if (sci_port_is_valid_phy_assignment(iport, iphy->phy_index))
apc_activity = SCIC_SDS_APC_ADD_PHY;
else
apc_activity = SCIC_SDS_APC_SKIP_PHY;
} else {
/*
* There is no matching Port for this PHY so lets search through the
* Ports and see if we can add the PHY to its own port or maybe start
* the timer and wait to see if a wider port can be made.
*
* Note the break when we reach the condition of the port id == phy id */
for (port_index = port_agent->phy_valid_port_range[iphy->phy_index].min_index;
port_index <= port_agent->phy_valid_port_range[iphy->phy_index].max_index;
port_index++) {
iport = &ihost->ports[port_index];
/* First we must make sure that this PHY can be added to this Port. */
if (sci_port_is_valid_phy_assignment(iport, iphy->phy_index)) {
/*
* Port contains a PHY with a greater PHY ID than the current
* PHY that has gone link up. This phy can not be part of any
* port so skip it and move on. */
if (iport->active_phy_mask > (1 << iphy->phy_index)) {
apc_activity = SCIC_SDS_APC_SKIP_PHY;
break;
}
/*
* We have reached the end of our Port list and have not found
* any reason why we should not either add the PHY to the port
* or wait for more phys to become active. */
if (iport->physical_port_index == iphy->phy_index) {
/*
* The Port either has no active PHYs.
* Consider that if the port had any active PHYs we would have
* or active PHYs with
* a lower PHY Id than this PHY. */
if (apc_activity != SCIC_SDS_APC_START_TIMER) {
apc_activity = SCIC_SDS_APC_ADD_PHY;
}
break;
}
/*
* The current Port has no active PHYs and this PHY could be part
* of this Port. Since we dont know as yet setup to start the
* timer and see if there is a better configuration. */
if (iport->active_phy_mask == 0) {
apc_activity = SCIC_SDS_APC_START_TIMER;
}
} else if (iport->active_phy_mask != 0) {
/*
* The Port has an active phy and the current Phy can not
* participate in this port so skip the PHY and see if
* there is a better configuration. */
apc_activity = SCIC_SDS_APC_SKIP_PHY;
}
}
}
/*
* Check to see if the start timer operations should instead map to an
* add phy operation. This is caused because we have been waiting to
* add a phy to a port but could not becuase the automatic port
* configuration engine had a choice of possible ports for the phy.
* Since we have gone through a timeout we are going to restrict the
* choice to the smallest possible port. */
if (
(start_timer == false)
&& (apc_activity == SCIC_SDS_APC_START_TIMER)
) {
apc_activity = SCIC_SDS_APC_ADD_PHY;
}
switch (apc_activity) {
case SCIC_SDS_APC_ADD_PHY:
status = sci_port_add_phy(iport, iphy);
if (status == SCI_SUCCESS) {
port_agent->phy_configured_mask |= (1 << iphy->phy_index);
}
break;
case SCIC_SDS_APC_START_TIMER:
sci_apc_agent_start_timer(port_agent,
SCIC_SDS_APC_WAIT_LINK_UP_NOTIFICATION);
break;
case SCIC_SDS_APC_SKIP_PHY:
default:
/* do nothing the PHY can not be made part of a port at this time. */
break;
}
}
/**
* sci_apc_agent_link_up - handle apc link up events
* @scic: This is the controller object that receives the link up
* notification.
* @sci_port: This is the port object associated with the phy. If the is no
* associated port this is an NULL.
* @sci_phy: This is the phy object which has gone link up.
*
* This method handles the automatic port configuration for link up
* notifications. Is it possible to get a link down notification from a phy
* that has no assocoated port?
*/
static void sci_apc_agent_link_up(struct isci_host *ihost,
struct sci_port_configuration_agent *port_agent,
struct isci_port *iport,
struct isci_phy *iphy)
{
u8 phy_index = iphy->phy_index;
if (!iport) {
/* the phy is not the part of this port */
port_agent->phy_ready_mask |= 1 << phy_index;
sci_apc_agent_start_timer(port_agent,
SCIC_SDS_APC_WAIT_LINK_UP_NOTIFICATION);
} else {
/* the phy is already the part of the port */
u32 port_state = iport->sm.current_state_id;
/* if the PORT'S state is resetting then the link up is from
* port hard reset in this case, we need to tell the port
* that link up is recieved
*/
BUG_ON(port_state != SCI_PORT_RESETTING);
port_agent->phy_ready_mask |= 1 << phy_index;
sci_port_link_up(iport, iphy);
}
}
/**
*
* @controller: This is the controller object that receives the link down
* notification.
* @iport: This is the port object associated with the phy. If the is no
* associated port this is an NULL.
* @iphy: This is the phy object which has gone link down.
*
* This method handles the automatic port configuration link down
* notifications. not associated with a port there is no action taken. Is it
* possible to get a link down notification from a phy that has no assocoated
* port?
*/
static void sci_apc_agent_link_down(
struct isci_host *ihost,
struct sci_port_configuration_agent *port_agent,
struct isci_port *iport,
struct isci_phy *iphy)
{
port_agent->phy_ready_mask &= ~(1 << iphy->phy_index);
if (!iport)
return;
if (port_agent->phy_configured_mask & (1 << iphy->phy_index)) {
enum sci_status status;
status = sci_port_remove_phy(iport, iphy);
if (status == SCI_SUCCESS)
port_agent->phy_configured_mask &= ~(1 << iphy->phy_index);
}
}
/* configure the phys into ports when the timer fires */
static void apc_agent_timeout(unsigned long data)
{
u32 index;
struct sci_timer *tmr = (struct sci_timer *)data;
struct sci_port_configuration_agent *port_agent;
struct isci_host *ihost;
unsigned long flags;
u16 configure_phy_mask;
port_agent = container_of(tmr, typeof(*port_agent), timer);
ihost = container_of(port_agent, typeof(*ihost), port_agent);
spin_lock_irqsave(&ihost->scic_lock, flags);
if (tmr->cancel)
goto done;
port_agent->timer_pending = false;
configure_phy_mask = ~port_agent->phy_configured_mask & port_agent->phy_ready_mask;
if (!configure_phy_mask)
goto done;
for (index = 0; index < SCI_MAX_PHYS; index++) {
if ((configure_phy_mask & (1 << index)) == 0)
continue;
sci_apc_agent_configure_ports(ihost, port_agent,
&ihost->phys[index], false);
}
done:
spin_unlock_irqrestore(&ihost->scic_lock, flags);
}
/*
* ******************************************************************************
* Public port configuration agent routines
* ****************************************************************************** */
/**
*
*
* This method will construct the port configuration agent for operation. This
* call is universal for both manual port configuration and automatic port
* configuration modes.
*/
void sci_port_configuration_agent_construct(
struct sci_port_configuration_agent *port_agent)
{
u32 index;
port_agent->phy_configured_mask = 0x00;
port_agent->phy_ready_mask = 0x00;
port_agent->link_up_handler = NULL;
port_agent->link_down_handler = NULL;
port_agent->timer_pending = false;
for (index = 0; index < SCI_MAX_PORTS; index++) {
port_agent->phy_valid_port_range[index].min_index = 0;
port_agent->phy_valid_port_range[index].max_index = 0;
}
}
enum sci_status sci_port_configuration_agent_initialize(
struct isci_host *ihost,
struct sci_port_configuration_agent *port_agent)
{
enum sci_status status;
enum sci_port_configuration_mode mode;
mode = ihost->oem_parameters.controller.mode_type;
if (mode == SCIC_PORT_MANUAL_CONFIGURATION_MODE) {
status = sci_mpc_agent_validate_phy_configuration(
ihost, port_agent);
port_agent->link_up_handler = sci_mpc_agent_link_up;
port_agent->link_down_handler = sci_mpc_agent_link_down;
sci_init_timer(&port_agent->timer, mpc_agent_timeout);
} else {
status = sci_apc_agent_validate_phy_configuration(
ihost, port_agent);
port_agent->link_up_handler = sci_apc_agent_link_up;
port_agent->link_down_handler = sci_apc_agent_link_down;
sci_init_timer(&port_agent->timer, apc_agent_timeout);
}
return status;
}