760 lines
25 KiB
C
760 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 (1000)
|
|
|
|
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 configuration 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. */
|
|
for (; phy_index < SCI_MAX_PHYS; phy_index++) {
|
|
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);
|
|
}
|
|
|
|
}
|
|
|
|
return sci_port_configuration_agent_validate_ports(ihost, port_agent);
|
|
}
|
|
|
|
static void mpc_agent_timeout(struct timer_list *t)
|
|
{
|
|
u8 index;
|
|
struct sci_timer *tmr = from_timer(tmr, t, timer);
|
|
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)
|
|
{
|
|
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 */
|
|
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(struct timer_list *t)
|
|
{
|
|
u32 index;
|
|
struct sci_timer *tmr = from_timer(tmr, t, timer);
|
|
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);
|
|
}
|
|
|
|
if (is_controller_start_complete(ihost))
|
|
sci_controller_transition_to_ready(ihost, SCI_SUCCESS);
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
bool is_port_config_apc(struct isci_host *ihost)
|
|
{
|
|
return ihost->port_agent.link_up_handler == sci_apc_agent_link_up;
|
|
}
|
|
|
|
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;
|
|
}
|