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Commit e2f8db50 authored by Dan Williams's avatar Dan Williams
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isci: uplevel port infrastructure 

* Move port configuration agent implementation
* Merge core/scic_sds_port.[ch] into port.[ch]
Reported-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent d35bc1bd
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drivers/scsi/isci/Makefile
View file @ e2f8db50
EXTRA_CFLAGS += -Idrivers/scsi/isci/core/ -Idrivers/scsi/isci/
obj-$(CONFIG_SCSI_ISCI) += isci.o
isci-objs := init.o phy.o request.o sata.o \
remote_device.o port.o timers.o \
......@@ -10,5 +9,4 @@ isci-objs := init.o phy.o request.o sata.o \
stp_request.o \
ssp_request.o \
smp_request.o \
core/scic_sds_port.o \
core/scic_sds_port_configuration_agent.o \
port_config.o \
drivers/scsi/isci/core/scic_config_parameters.h deleted 100644 → 0
View file @ d35bc1bd
/*
* 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.
*/
#ifndef _SCIC_SDS_USER_PARAMETERS_H_
#define _SCIC_SDS_USER_PARAMETERS_H_
#include "probe_roms.h"
struct scic_sds_controller;
/**
*
*
* SCIC_SDS_PARM_PHY_SPEED These constants define the speeds utilized for a
* phy/port.
*/
#define SCIC_SDS_PARM_NO_SPEED 0
/**
*
*
* This value of 1 indicates generation 1 (i.e. 1.5 Gb/s).
*/
#define SCIC_SDS_PARM_GEN1_SPEED 1
/**
*
*
* This value of 2 indicates generation 2 (i.e. 3.0 Gb/s).
*/
#define SCIC_SDS_PARM_GEN2_SPEED 2
/**
*
*
* This value of 3 indicates generation 3 (i.e. 6.0 Gb/s).
*/
#define SCIC_SDS_PARM_GEN3_SPEED 3
/**
*
*
* For range checks, the max speed generation
*/
#define SCIC_SDS_PARM_MAX_SPEED SCIC_SDS_PARM_GEN3_SPEED
/**
* struct scic_sds_user_parameters - This structure delineates the various user
* parameters that can be changed by the core user.
*
*
*/
struct scic_sds_user_parameters {
struct sci_phy_user_params {
/**
* This field specifies the NOTIFY (ENABLE SPIN UP) primitive
* insertion frequency for this phy index.
*/
u32 notify_enable_spin_up_insertion_frequency;
/**
* This method specifies the number of transmitted DWORDs within which
* to transmit a single ALIGN primitive. This value applies regardless
* of what type of device is attached or connection state. A value of
* 0 indicates that no ALIGN primitives will be inserted.
*/
u16 align_insertion_frequency;
/**
* This method specifies the number of transmitted DWORDs within which
* to transmit 2 ALIGN primitives. This applies for SAS connections
* only. A minimum value of 3 is required for this field.
*/
u16 in_connection_align_insertion_frequency;
/**
* This field indicates the maximum speed generation to be utilized
* by phys in the supplied port.
* - A value of 1 indicates generation 1 (i.e. 1.5 Gb/s).
* - A value of 2 indicates generation 2 (i.e. 3.0 Gb/s).
* - A value of 3 indicates generation 3 (i.e. 6.0 Gb/s).
*/
u8 max_speed_generation;
} phys[SCI_MAX_PHYS];
/**
* This field specifies the maximum number of direct attached devices
* that can have power supplied to them simultaneously.
*/
u8 max_number_concurrent_device_spin_up;
/**
* This field specifies the number of seconds to allow a phy to consume
* power before yielding to another phy.
*
*/
u8 phy_spin_up_delay_interval;
/**
* These timer values specifies how long a link will remain open with no
* activity in increments of a microsecond, it can be in increments of
* 100 microseconds if the upper most bit is set.
*
*/
u16 stp_inactivity_timeout;
u16 ssp_inactivity_timeout;
/**
* These timer values specifies how long a link will remain open in increments
* of 100 microseconds.
*
*/
u16 stp_max_occupancy_timeout;
u16 ssp_max_occupancy_timeout;
/**
* This timer value specifies how long a link will remain open with no
* outbound traffic in increments of a microsecond.
*
*/
u8 no_outbound_task_timeout;
};
/**
* This structure/union specifies the various different user parameter sets
* available. Each type is specific to a hardware controller version.
*
* union scic_user_parameters
*/
union scic_user_parameters {
/**
* This field specifies the user parameters specific to the
* Storage Controller Unit (SCU) Driver Standard (SDS) version
* 1.
*/
struct scic_sds_user_parameters sds1;
};
/**
*
*
* SCIC_SDS_OEM_PHY_MASK These constants define the valid values for phy_mask
*/
/**
*
*
* This is the min value assignable to a port's phy mask
*/
#define SCIC_SDS_PARM_PHY_MASK_MIN 0x0
/**
*
*
* This is the max value assignable to a port's phy mask
*/
#define SCIC_SDS_PARM_PHY_MASK_MAX 0xF
#define MAX_CONCURRENT_DEVICE_SPIN_UP_COUNT 4
/**
* This structure/union specifies the various different OEM parameter sets
* available. Each type is specific to a hardware controller version.
*
* union scic_oem_parameters
*/
union scic_oem_parameters {
/**
* This field specifies the OEM parameters specific to the
* Storage Controller Unit (SCU) Driver Standard (SDS) version
* 1.
*/
struct scic_sds_oem_params sds1;
};
int scic_oem_parameters_validate(struct scic_sds_oem_params *oem);
/**
* scic_oem_parameters_get() - This method allows the user to retreive the OEM
* parameters utilized by the controller.
* @controller: This parameter specifies the controller on which to set the
* user parameters.
* @oem_parameters: This parameter specifies the OEM parameters object in which
* to write the core's OEM parameters.
*
*/
void scic_oem_parameters_get(
struct scic_sds_controller *controller,
union scic_oem_parameters *oem_parameters);
#endif /* _SCIC_SDS_USER_PARAMETERS_H_ */
drivers/scsi/isci/core/scic_port.h deleted 100644 → 0
View file @ d35bc1bd
/*
* 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.
*/
#ifndef _SCIC_PORT_H_
#define _SCIC_PORT_H_
#include "isci.h"
#include "sas.h"
#include "phy.h"
struct scic_sds_port;
enum scic_port_not_ready_reason_code {
SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS,
SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED,
SCIC_PORT_NOT_READY_INVALID_PORT_CONFIGURATION,
SCIC_PORT_NOT_READY_RECONFIGURING,
SCIC_PORT_NOT_READY_REASON_CODE_MAX
};
struct scic_port_end_point_properties {
struct sci_sas_address sas_address;
struct scic_phy_proto protocols;
};
struct scic_port_properties {
u32 index;
struct scic_port_end_point_properties local;
struct scic_port_end_point_properties remote;
u32 phy_mask;
};
enum sci_status scic_port_get_properties(
struct scic_sds_port *port,
struct scic_port_properties *properties);
enum sci_status scic_port_hard_reset(
struct scic_sds_port *port,
u32 reset_timeout);
void scic_port_enable_broadcast_change_notification(
struct scic_sds_port *port);
#endif /* _SCIC_PORT_H_ */
drivers/scsi/isci/core/scic_sds_port.c deleted 100644 → 0
View file @ d35bc1bd
/*
* 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"
#include "scic_port.h"
#include "scic_sds_port.h"
#include "remote_device.h"
#include "remote_node_context.h"
#include "registers.h"
#include "timers.h"
#include "scu_task_context.h"
#define SCIC_SDS_PORT_MIN_TIMER_COUNT (SCI_MAX_PORTS)
#define SCIC_SDS_PORT_MAX_TIMER_COUNT (SCI_MAX_PORTS)
#define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000)
#define SCU_DUMMY_INDEX (0xFFFF)
/**
*
* @sci_port: This is the port object to which the phy is being assigned.
* @phy_index: This is the phy index that is being assigned to the port.
*
* This method will return a true value if the specified phy can be assigned to
* this port The following is a list of phys for each port that are allowed: -
* Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method
* doesn't preclude all configurations. It merely ensures that a phy is part
* of the allowable set of phy identifiers for that port. For example, one
* could assign phy 3 to port 0 and no other phys. Please refer to
* scic_sds_port_is_phy_mask_valid() for information regarding whether the
* phy_mask for a port can be supported. bool true if this is a valid phy
* assignment for the port false if this is not a valid phy assignment for the
* port
*/
bool scic_sds_port_is_valid_phy_assignment(
struct scic_sds_port *sci_port,
u32 phy_index)
{
/* Initialize to invalid value. */
u32 existing_phy_index = SCI_MAX_PHYS;
u32 index;
if ((sci_port->physical_port_index == 1) && (phy_index != 1)) {
return false;
}
if (sci_port->physical_port_index == 3 && phy_index != 3) {
return false;
}
if (
(sci_port->physical_port_index == 2)
&& ((phy_index == 0) || (phy_index == 1))
) {
return false;
}
for (index = 0; index < SCI_MAX_PHYS; index++) {
if ((sci_port->phy_table[index] != NULL)
&& (index != phy_index)) {
existing_phy_index = index;
}
}
/*
* Ensure that all of the phys in the port are capable of
* operating at the same maximum link rate. */
if (
(existing_phy_index < SCI_MAX_PHYS)
&& (sci_port->owning_controller->user_parameters.sds1.phys[
phy_index].max_speed_generation !=
sci_port->owning_controller->user_parameters.sds1.phys[
existing_phy_index].max_speed_generation)
)
return false;
return true;
}
/**
* This method requests a list (mask) of the phys contained in the supplied SAS
* port.
* @sci_port: a handle corresponding to the SAS port for which to return the
* phy mask.
*
* Return a bit mask indicating which phys are a part of this port. Each bit
* corresponds to a phy identifier (e.g. bit 0 = phy id 0).
*/
static u32 scic_sds_port_get_phys(struct scic_sds_port *sci_port)
{
u32 index;
u32 mask;
mask = 0;
for (index = 0; index < SCI_MAX_PHYS; index++) {
if (sci_port->phy_table[index] != NULL) {
mask |= (1 << index);
}
}
return mask;
}
/**
*
* @sci_port: This is the port object for which to determine if the phy mask
* can be supported.
*
* This method will return a true value if the port's phy mask can be supported
* by the SCU. The following is a list of valid PHY mask configurations for
* each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2]
* - Port 3 - [3] This method returns a boolean indication specifying if the
* phy mask can be supported. true if this is a valid phy assignment for the
* port false if this is not a valid phy assignment for the port
*/
static bool scic_sds_port_is_phy_mask_valid(
struct scic_sds_port *sci_port,
u32 phy_mask)
{
if (sci_port->physical_port_index == 0) {
if (((phy_mask & 0x0F) == 0x0F)
|| ((phy_mask & 0x03) == 0x03)
|| ((phy_mask & 0x01) == 0x01)
|| (phy_mask == 0))
return true;
} else if (sci_port->physical_port_index == 1) {
if (((phy_mask & 0x02) == 0x02)
|| (phy_mask == 0))
return true;
} else if (sci_port->physical_port_index == 2) {
if (((phy_mask & 0x0C) == 0x0C)
|| ((phy_mask & 0x04) == 0x04)
|| (phy_mask == 0))
return true;
} else if (sci_port->physical_port_index == 3) {
if (((phy_mask & 0x08) == 0x08)
|| (phy_mask == 0))
return true;
}
return false;
}
/**
*
* @sci_port: This parameter specifies the port from which to return a
* connected phy.
*
* This method retrieves a currently active (i.e. connected) phy contained in
* the port. Currently, the lowest order phy that is connected is returned.
* This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is
* returned if there are no currently active (i.e. connected to a remote end
* point) phys contained in the port. All other values specify a struct scic_sds_phy
* object that is active in the port.
*/
static struct scic_sds_phy *scic_sds_port_get_a_connected_phy(
struct scic_sds_port *sci_port
) {
u32 index;
struct scic_sds_phy *phy;
for (index = 0; index < SCI_MAX_PHYS; index++) {
/*
* Ensure that the phy is both part of the port and currently
* connected to the remote end-point. */
phy = sci_port->phy_table[index];
if (
(phy != NULL)
&& scic_sds_port_active_phy(sci_port, phy)
) {
return phy;
}
}
return NULL;
}
/**
* scic_sds_port_set_phy() -
* @out]: port The port object to which the phy assignement is being made.
* @out]: phy The phy which is being assigned to the port.
*
* This method attempts to make the assignment of the phy to the port. If
* successful the phy is assigned to the ports phy table. bool true if the phy
* assignment can be made. false if the phy assignement can not be made. This
* is a functional test that only fails if the phy is currently assigned to a
* different port.
*/
static enum sci_status scic_sds_port_set_phy(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
/*
* Check to see if we can add this phy to a port
* that means that the phy is not part of a port and that the port does
* not already have a phy assinged to the phy index. */
if (
(port->phy_table[phy->phy_index] == NULL)
&& (scic_sds_phy_get_port(phy) == NULL)
&& scic_sds_port_is_valid_phy_assignment(port, phy->phy_index)
) {
/*
* Phy is being added in the stopped state so we are in MPC mode
* make logical port index = physical port index */
port->logical_port_index = port->physical_port_index;
port->phy_table[phy->phy_index] = phy;
scic_sds_phy_set_port(phy, port);
return SCI_SUCCESS;
}
return SCI_FAILURE;
}
/**
* scic_sds_port_clear_phy() -
* @out]: port The port from which the phy is being cleared.
* @out]: phy The phy being cleared from the port.
*
* This method will clear the phy assigned to this port. This method fails if
* this phy is not currently assinged to this port. bool true if the phy is
* removed from the port. false if this phy is not assined to this port.
*/
static enum sci_status scic_sds_port_clear_phy(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
/* Make sure that this phy is part of this port */
if (port->phy_table[phy->phy_index] == phy &&
scic_sds_phy_get_port(phy) == port) {
struct scic_sds_controller *scic = port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
/* Yep it is assigned to this port so remove it */
scic_sds_phy_set_port(phy, &ihost->ports[SCI_MAX_PORTS].sci);
port->phy_table[phy->phy_index] = NULL;
return SCI_SUCCESS;
}
return SCI_FAILURE;
}
/**
* scic_sds_port_add_phy() -
* @sci_port: This parameter specifies the port in which the phy will be added.
* @sci_phy: This parameter is the phy which is to be added to the port.
*
* This method will add a PHY to the selected port. This method returns an
* enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other status
* is failre to add the phy to the port.
*/
enum sci_status scic_sds_port_add_phy(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
return sci_port->state_handlers->add_phy_handler(
sci_port, sci_phy);
}
/**
* scic_sds_port_remove_phy() -
* @sci_port: This parameter specifies the port in which the phy will be added.
* @sci_phy: This parameter is the phy which is to be added to the port.
*
* This method will remove the PHY from the selected PORT. This method returns
* an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any other
* status is failre to add the phy to the port.
*/
enum sci_status scic_sds_port_remove_phy(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
return sci_port->state_handlers->remove_phy_handler(
sci_port, sci_phy);
}
/**
* This method requests the SAS address for the supplied SAS port from the SCI
* implementation.
* @sci_port: a handle corresponding to the SAS port for which to return the
* SAS address.
* @sas_address: This parameter specifies a pointer to a SAS address structure
* into which the core will copy the SAS address for the port.
*
*/
void scic_sds_port_get_sas_address(
struct scic_sds_port *sci_port,
struct sci_sas_address *sas_address)
{
u32 index;
sas_address->high = 0;
sas_address->low = 0;
for (index = 0; index < SCI_MAX_PHYS; index++) {
if (sci_port->phy_table[index] != NULL) {
scic_sds_phy_get_sas_address(sci_port->phy_table[index], sas_address);
}
}
}
/*
* This function will indicate which protocols are supported by this port.
* @sci_port: a handle corresponding to the SAS port for which to return the
* supported protocols.
* @protocols: This parameter specifies a pointer to a data structure
* which the core will copy the protocol values for the port from the
* transmit_identification register.
*/
static void
scic_sds_port_get_protocols(struct scic_sds_port *sci_port,
struct scic_phy_proto *protocols)
{
u8 index;
protocols->all = 0;
for (index = 0; index < SCI_MAX_PHYS; index++) {
if (sci_port->phy_table[index] != NULL) {
scic_sds_phy_get_protocols(sci_port->phy_table[index],
protocols);
}
}
}
/*
* This function requests the SAS address for the device directly attached to
* this SAS port.
* @sci_port: a handle corresponding to the SAS port for which to return the
* SAS address.
* @sas_address: This parameter specifies a pointer to a SAS address structure
* into which the core will copy the SAS address for the device directly
* attached to the port.
*
*/
void scic_sds_port_get_attached_sas_address(
struct scic_sds_port *sci_port,
struct sci_sas_address *sas_address)
{
struct scic_sds_phy *sci_phy;
/*
* Ensure that the phy is both part of the port and currently
* connected to the remote end-point.
*/
sci_phy = scic_sds_port_get_a_connected_phy(sci_port);
if (sci_phy) {
if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) {
scic_sds_phy_get_attached_sas_address(sci_phy,
sas_address);
} else {
scic_sds_phy_get_sas_address(sci_phy, sas_address);
sas_address->low += sci_phy->phy_index;
}
} else {
sas_address->high = 0;
sas_address->low = 0;
}
}
/**
* scic_sds_port_construct_dummy_rnc() - create dummy rnc for si workaround
*
* @sci_port: logical port on which we need to create the remote node context
* @rni: remote node index for this remote node context.
*
* This routine will construct a dummy remote node context data structure
* This structure will be posted to the hardware to work around a scheduler
* error in the hardware.
*/
static void scic_sds_port_construct_dummy_rnc(struct scic_sds_port *sci_port, u16 rni)
{
union scu_remote_node_context *rnc;
rnc = &sci_port->owning_controller->remote_node_context_table[rni];
memset(rnc, 0, sizeof(union scu_remote_node_context));
rnc->ssp.remote_sas_address_hi = 0;
rnc->ssp.remote_sas_address_lo = 0;
rnc->ssp.remote_node_index = rni;
rnc->ssp.remote_node_port_width = 1;
rnc->ssp.logical_port_index = sci_port->physical_port_index;
rnc->ssp.nexus_loss_timer_enable = false;
rnc->ssp.check_bit = false;
rnc->ssp.is_valid = true;
rnc->ssp.is_remote_node_context = true;
rnc->ssp.function_number = 0;
rnc->ssp.arbitration_wait_time = 0;
}
/**
* scic_sds_port_construct_dummy_task() - create dummy task for si workaround
* @sci_port The logical port on which we need to create the
* remote node context.
* context.
* @tci The remote node index for this remote node context.
*
* This routine will construct a dummy task context data structure. This
* structure will be posted to the hardwre to work around a scheduler error
* in the hardware.
*
*/
static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u16 tci)
{
struct scu_task_context *task_context;
task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tci);
memset(task_context, 0, sizeof(struct scu_task_context));
task_context->abort = 0;
task_context->priority = 0;
task_context->initiator_request = 1;
task_context->connection_rate = 1;
task_context->protocol_engine_index = 0;
task_context->logical_port_index = sci_port->physical_port_index;
task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP;
task_context->task_index = scic_sds_io_tag_get_index(tci);
task_context->valid = SCU_TASK_CONTEXT_VALID;
task_context->context_type = SCU_TASK_CONTEXT_TYPE;
task_context->remote_node_index = sci_port->reserved_rni;
task_context->command_code = 0;
task_context->link_layer_control = 0;
task_context->do_not_dma_ssp_good_response = 1;
task_context->strict_ordering = 0;
task_context->control_frame = 0;
task_context->timeout_enable = 0;
task_context->block_guard_enable = 0;
task_context->address_modifier = 0;
task_context->task_phase = 0x01;
}
static void scic_sds_port_destroy_dummy_resources(struct scic_sds_port *sci_port)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
if (sci_port->reserved_tci != SCU_DUMMY_INDEX)
scic_controller_free_io_tag(scic, sci_port->reserved_tci);
if (sci_port->reserved_rni != SCU_DUMMY_INDEX)
scic_sds_remote_node_table_release_remote_node_index(&scic->available_remote_nodes,
1, sci_port->reserved_rni);
sci_port->reserved_rni = SCU_DUMMY_INDEX;
sci_port->reserved_tci = SCU_DUMMY_INDEX;
}
/**
* This method performs initialization of the supplied port. Initialization
* includes: - state machine initialization - member variable initialization
* - configuring the phy_mask
* @sci_port:
* @transport_layer_registers:
* @port_task_scheduler_registers:
* @port_configuration_regsiter:
*
* enum sci_status SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION This value is returned
* if the phy being added to the port
*/
enum sci_status scic_sds_port_initialize(
struct scic_sds_port *sci_port,
void __iomem *port_task_scheduler_registers,
void __iomem *port_configuration_regsiter,
void __iomem *viit_registers)
{
sci_port->port_task_scheduler_registers = port_task_scheduler_registers;
sci_port->port_pe_configuration_register = port_configuration_regsiter;
sci_port->viit_registers = viit_registers;
return SCI_SUCCESS;
}
/**
* scic_port_get_properties() - This method simply returns the properties
* regarding the port, such as: physical index, protocols, sas address, etc.
* @port: this parameter specifies the port for which to retrieve the physical
* index.
* @properties: This parameter specifies the properties structure into which to
* copy the requested information.
*
* Indicate if the user specified a valid port. SCI_SUCCESS This value is
* returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This
* value is returned if the specified port is not valid. When this value is
* returned, no data is copied to the properties output parameter.
*/
enum sci_status scic_port_get_properties(
struct scic_sds_port *port,
struct scic_port_properties *prop)
{
if ((port == NULL) ||
(port->logical_port_index == SCIC_SDS_DUMMY_PORT))
return SCI_FAILURE_INVALID_PORT;
prop->index = port->logical_port_index;
prop->phy_mask = scic_sds_port_get_phys(port);
scic_sds_port_get_sas_address(port, &prop->local.sas_address);
scic_sds_port_get_protocols(port, &prop->local.protocols);
scic_sds_port_get_attached_sas_address(port, &prop->remote.sas_address);
return SCI_SUCCESS;
}
/**
* scic_port_hard_reset() - perform port hard reset
* @port: a handle corresponding to the SAS port to be hard reset.
* @reset_timeout: This parameter specifies the number of milliseconds in which
* the port reset operation should complete.
*
* The SCI User callback in scic_user_callbacks_t will only be called once for
* each phy in the SAS Port at completion of the hard reset sequence. Return a
* status indicating whether the hard reset started successfully. SCI_SUCCESS
* This value is returned if the hard reset operation started successfully.
*/
enum sci_status scic_port_hard_reset(
struct scic_sds_port *port,
u32 reset_timeout)
{
return port->state_handlers->reset_handler(
port, reset_timeout);
}
/**
* This method assigns the direct attached device ID for this port.
*
* @param[in] sci_port The port for which the direct attached device id is to
* be assigned.
* @param[in] device_id The direct attached device ID to assign to the port.
* This will be the RNi for the device
*/
void scic_sds_port_setup_transports(
struct scic_sds_port *sci_port,
u32 device_id)
{
u8 index;
for (index = 0; index < SCI_MAX_PHYS; index++) {
if (sci_port->active_phy_mask & (1 << index))
scic_sds_phy_setup_transport(sci_port->phy_table[index], device_id);
}
}
/**
*
* @sci_port: This is the port on which the phy should be enabled.
* @sci_phy: This is the specific phy which to enable.
* @do_notify_user: This parameter specifies whether to inform the user (via
* scic_cb_port_link_up()) as to the fact that a new phy as become ready.
*
* This function will activate the phy in the port.
* Activation includes: - adding
* the phy to the port - enabling the Protocol Engine in the silicon. -
* notifying the user that the link is up. none
*/
static void scic_sds_port_activate_phy(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy,
bool do_notify_user)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA)
scic_sds_phy_resume(sci_phy);
sci_port->active_phy_mask |= 1 << sci_phy->phy_index;
scic_sds_controller_clear_invalid_phy(scic, sci_phy);
if (do_notify_user == true)
isci_port_link_up(ihost, sci_port, sci_phy);
}
void scic_sds_port_deactivate_phy(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy,
bool do_notify_user)
{
struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port);
struct isci_port *iport = sci_port_to_iport(sci_port);
struct isci_host *ihost = scic_to_ihost(scic);
struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
sci_port->active_phy_mask &= ~(1 << sci_phy->phy_index);
sci_phy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN;
/* Re-assign the phy back to the LP as if it were a narrow port */
writel(sci_phy->phy_index,
&sci_port->port_pe_configuration_register[sci_phy->phy_index]);
if (do_notify_user == true)
isci_port_link_down(ihost, iphy, iport);
}
/**
*
* @sci_port: This is the port on which the phy should be disabled.
* @sci_phy: This is the specific phy which to disabled.
*
* This function will disable the phy and report that the phy is not valid for
* this port object. None
*/
static void scic_sds_port_invalid_link_up(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
/*
* Check to see if we have alreay reported this link as bad and if
* not go ahead and tell the SCI_USER that we have discovered an
* invalid link.
*/
if ((scic->invalid_phy_mask & (1 << sci_phy->phy_index)) == 0) {
scic_sds_controller_set_invalid_phy(scic, sci_phy);
dev_warn(&scic_to_ihost(scic)->pdev->dev, "Invalid link up!\n");
}
}
/**
* scic_sds_port_general_link_up_handler - phy can be assigned to port?
* @sci_port: scic_sds_port object for which has a phy that has gone link up.
* @sci_phy: This is the struct scic_sds_phy object that has gone link up.
* @do_notify_user: This parameter specifies whether to inform the user (via
* scic_cb_port_link_up()) as to the fact that a new phy as become ready.
*
* Determine if this phy can be assigned to this
* port . If the phy is not a valid PHY for
* this port then the function will notify the user. A PHY can only be
* part of a port if it's attached SAS ADDRESS is the same as all other PHYs in
* the same port. none
*/
static void scic_sds_port_general_link_up_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy,
bool do_notify_user)
{
struct sci_sas_address port_sas_address;
struct sci_sas_address phy_sas_address;
scic_sds_port_get_attached_sas_address(sci_port, &port_sas_address);
scic_sds_phy_get_attached_sas_address(sci_phy, &phy_sas_address);
/* If the SAS address of the new phy matches the SAS address of
* other phys in the port OR this is the first phy in the port,
* then activate the phy and allow it to be used for operations
* in this port.
*/
if ((phy_sas_address.high == port_sas_address.high &&
phy_sas_address.low == port_sas_address.low) ||
sci_port->active_phy_mask == 0) {
struct sci_base_state_machine *sm = &sci_port->state_machine;
scic_sds_port_activate_phy(sci_port, sci_phy, do_notify_user);
if (sm->current_state_id == SCI_BASE_PORT_STATE_RESETTING)
sci_base_state_machine_change_state(sm, SCI_BASE_PORT_STATE_READY);
} else
scic_sds_port_invalid_link_up(sci_port, sci_phy);
}
/**
* This method returns false if the port only has a single phy object assigned.
* If there are no phys or more than one phy then the method will return
* true.
* @sci_port: The port for which the wide port condition is to be checked.
*
* bool true Is returned if this is a wide ported port. false Is returned if
* this is a narrow port.
*/
static bool scic_sds_port_is_wide(struct scic_sds_port *sci_port)
{
u32 index;
u32 phy_count = 0;
for (index = 0; index < SCI_MAX_PHYS; index++) {
if (sci_port->phy_table[index] != NULL) {
phy_count++;
}
}
return phy_count != 1;
}
/**
* This method is called by the PHY object when the link is detected. if the
* port wants the PHY to continue on to the link up state then the port
* layer must return true. If the port object returns false the phy object
* must halt its attempt to go link up.
* @sci_port: The port associated with the phy object.
* @sci_phy: The phy object that is trying to go link up.
*
* true if the phy object can continue to the link up condition. true Is
* returned if this phy can continue to the ready state. false Is returned if
* can not continue on to the ready state. This notification is in place for
* wide ports and direct attached phys. Since there are no wide ported SATA
* devices this could become an invalid port configuration.
*/
bool scic_sds_port_link_detected(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
if ((sci_port->logical_port_index != SCIC_SDS_DUMMY_PORT) &&
(sci_phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) &&
scic_sds_port_is_wide(sci_port)) {
scic_sds_port_invalid_link_up(sci_port, sci_phy);
return false;
}
return true;
}
/**
* This method is the entry point for the phy to inform the port that it is now
* in a ready state
* @sci_port:
*
*
*/
void scic_sds_port_link_up(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
sci_phy->is_in_link_training = false;
sci_port->state_handlers->link_up_handler(sci_port, sci_phy);
}
/**
* This method is the entry point for the phy to inform the port that it is no
* longer in a ready state
* @sci_port:
*
*
*/
void scic_sds_port_link_down(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
sci_port->state_handlers->link_down_handler(sci_port, sci_phy);
}
/**
* This method is called to start an IO request on this port.
* @sci_port:
* @sci_dev:
* @sci_req:
*
* enum sci_status
*/
enum sci_status scic_sds_port_start_io(
struct scic_sds_port *sci_port,
struct scic_sds_remote_device *sci_dev,
struct scic_sds_request *sci_req)
{
return sci_port->state_handlers->start_io_handler(
sci_port, sci_dev, sci_req);
}
/**
* This method is called to complete an IO request to the port.
* @sci_port:
* @sci_dev:
* @sci_req:
*
* enum sci_status
*/
enum sci_status scic_sds_port_complete_io(
struct scic_sds_port *sci_port,
struct scic_sds_remote_device *sci_dev,
struct scic_sds_request *sci_req)
{
return sci_port->state_handlers->complete_io_handler(
sci_port, sci_dev, sci_req);
}
/**
* This method is provided to timeout requests for port operations. Mostly its
* for the port reset operation.
*
*
*/
static void scic_sds_port_timeout_handler(void *port)
{
struct scic_sds_port *sci_port = port;
u32 current_state;
current_state = sci_base_state_machine_get_state(
&sci_port->state_machine);
if (current_state == SCI_BASE_PORT_STATE_RESETTING) {
/*
* if the port is still in the resetting state then the
* timeout fired before the reset completed.
*/
sci_base_state_machine_change_state(
&sci_port->state_machine,
SCI_BASE_PORT_STATE_FAILED);
} else if (current_state == SCI_BASE_PORT_STATE_STOPPED) {
/*
* if the port is stopped then the start request failed
* In this case stay in the stopped state.
*/
dev_err(sciport_to_dev(sci_port),
"%s: SCIC Port 0x%p failed to stop before tiemout.\n",
__func__,
sci_port);
} else if (current_state == SCI_BASE_PORT_STATE_STOPPING) {
/*
* if the port is still stopping then the stop has not
* completed
*/
isci_port_stop_complete(
scic_sds_port_get_controller(sci_port),
sci_port,
SCI_FAILURE_TIMEOUT);
} else {
/*
* The port is in the ready state and we have a timer
* reporting a timeout this should not happen.
*/
dev_err(sciport_to_dev(sci_port),
"%s: SCIC Port 0x%p is processing a timeout operation "
"in state %d.\n",
__func__,
sci_port,
current_state);
}
}
/* --------------------------------------------------------------------------- */
/**
* This function updates the hardwares VIIT entry for this port.
*
*
*/
static void scic_sds_port_update_viit_entry(struct scic_sds_port *sci_port)
{
struct sci_sas_address sas_address;
scic_sds_port_get_sas_address(sci_port, &sas_address);
writel(sas_address.high,
&sci_port->viit_registers->initiator_sas_address_hi);
writel(sas_address.low,
&sci_port->viit_registers->initiator_sas_address_lo);
/* This value get cleared just in case its not already cleared */
writel(0, &sci_port->viit_registers->reserved);
/* We are required to update the status register last */
writel(SCU_VIIT_ENTRY_ID_VIIT |
SCU_VIIT_IPPT_INITIATOR |
((1 << sci_port->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) |
SCU_VIIT_STATUS_ALL_VALID,
&sci_port->viit_registers->status);
}
/**
* This method returns the maximum allowed speed for data transfers on this
* port. This maximum allowed speed evaluates to the maximum speed of the
* slowest phy in the port.
* @sci_port: This parameter specifies the port for which to retrieve the
* maximum allowed speed.
*
* This method returns the maximum negotiated speed of the slowest phy in the
* port.
*/
enum sas_linkrate scic_sds_port_get_max_allowed_speed(
struct scic_sds_port *sci_port)
{
u16 index;
enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS;
struct scic_sds_phy *phy = NULL;
/*
* Loop through all of the phys in this port and find the phy with the
* lowest maximum link rate. */
for (index = 0; index < SCI_MAX_PHYS; index++) {
phy = sci_port->phy_table[index];
if (
(phy != NULL)
&& (scic_sds_port_active_phy(sci_port, phy) == true)
&& (phy->max_negotiated_speed < max_allowed_speed)
)
max_allowed_speed = phy->max_negotiated_speed;
}
return max_allowed_speed;
}
/**
* This method passes the event to core user.
* @sci_port: The port that a BCN happens.
* @sci_phy: The phy that receives BCN.
*
*/
void scic_sds_port_broadcast_change_received(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
/* notify the user. */
isci_port_bc_change_received(ihost, sci_port, sci_phy);
}
/**
* This API methhod enables the broadcast change notification from underneath
* hardware.
* @sci_port: The port that a BCN had been disabled from.
*
*/
void scic_port_enable_broadcast_change_notification(
struct scic_sds_port *port)
{
struct scic_sds_phy *phy;
u32 register_value;
u8 index;
/* Loop through all of the phys to enable BCN. */
for (index = 0; index < SCI_MAX_PHYS; index++) {
phy = port->phy_table[index];
if (phy != NULL) {
register_value =
readl(&phy->link_layer_registers->link_layer_control);
/* clear the bit by writing 1. */
writel(register_value,
&phy->link_layer_registers->link_layer_control);
}
}
}
/*
* ****************************************************************************
* * READY SUBSTATE HANDLERS
* **************************************************************************** */
/*
* This method is the general ready state stop handler for the struct scic_sds_port
* object. This function will transition the ready substate machine to its
* final state. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_ready_substate_stop_handler(
struct scic_sds_port *port)
{
sci_base_state_machine_change_state(
&port->state_machine,
SCI_BASE_PORT_STATE_STOPPING
);
return SCI_SUCCESS;
}
/*
* This method is the general ready substate complete io handler for the
* struct scic_sds_port object. This function decrments the outstanding request count
* for this port object. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_ready_substate_complete_io_handler(
struct scic_sds_port *port,
struct scic_sds_remote_device *device,
struct scic_sds_request *io_request)
{
scic_sds_port_decrement_request_count(port);
return SCI_SUCCESS;
}
static enum sci_status scic_sds_port_ready_substate_add_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
enum sci_status status;
status = scic_sds_port_set_phy(port, phy);
if (status == SCI_SUCCESS) {
scic_sds_port_general_link_up_handler(port, phy, true);
port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
sci_base_state_machine_change_state(
&port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
);
}
return status;
}
static enum sci_status scic_sds_port_ready_substate_remove_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
enum sci_status status;
status = scic_sds_port_clear_phy(port, phy);
if (status == SCI_SUCCESS) {
scic_sds_port_deactivate_phy(port, phy, true);
port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
sci_base_state_machine_change_state(
&port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
);
}
return status;
}
/*
* ****************************************************************************
* * READY SUBSTATE WAITING HANDLERS
* **************************************************************************** */
/**
*
* @sci_port: This is the struct scic_sds_port object that which has a phy that has
* gone link up.
* @sci_phy: This is the struct scic_sds_phy object that has gone link up.
*
* This method is the ready waiting substate link up handler for the
* struct scic_sds_port object. This methos will report the link up condition for
* this port and will transition to the ready operational substate. none
*/
static void scic_sds_port_ready_waiting_substate_link_up_handler(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
/*
* Since this is the first phy going link up for the port we can just enable
* it and continue. */
scic_sds_port_activate_phy(sci_port, sci_phy, true);
sci_base_state_machine_change_state(
&sci_port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL
);
}
/*
* This method is the ready waiting substate start io handler for the
* struct scic_sds_port object. The port object can not accept new requests so the
* request is failed. enum sci_status SCI_FAILURE_INVALID_STATE
*/
static enum sci_status scic_sds_port_ready_waiting_substate_start_io_handler(
struct scic_sds_port *port,
struct scic_sds_remote_device *device,
struct scic_sds_request *io_request)
{
return SCI_FAILURE_INVALID_STATE;
}
/*
* ****************************************************************************
* * READY SUBSTATE OPERATIONAL HANDLERS
* **************************************************************************** */
/*
* This method will casue the port to reset. enum sci_status SCI_SUCCESS
*/
static enum
sci_status scic_sds_port_ready_operational_substate_reset_handler(
struct scic_sds_port *port,
u32 timeout)
{
enum sci_status status = SCI_FAILURE_INVALID_PHY;
u32 phy_index;
struct scic_sds_phy *selected_phy = NULL;
/* Select a phy on which we can send the hard reset request. */
for (phy_index = 0;
(phy_index < SCI_MAX_PHYS) && (selected_phy == NULL);
phy_index++) {
selected_phy = port->phy_table[phy_index];
if ((selected_phy != NULL) &&
!scic_sds_port_active_phy(port, selected_phy)) {
/*
* We found a phy but it is not ready select
* different phy
*/
selected_phy = NULL;
}
}
/* If we have a phy then go ahead and start the reset procedure */
if (selected_phy != NULL) {
status = scic_sds_phy_reset(selected_phy);
if (status == SCI_SUCCESS) {
isci_timer_start(port->timer_handle, timeout);
port->not_ready_reason =
SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED;
sci_base_state_machine_change_state(
&port->state_machine,
SCI_BASE_PORT_STATE_RESETTING);
}
}
return status;
}
/**
* scic_sds_port_ready_operational_substate_link_up_handler() -
* @sci_port: This is the struct scic_sds_port object that which has a phy that has
* gone link up.
* @sci_phy: This is the struct scic_sds_phy object that has gone link up.
*
* This method is the ready operational substate link up handler for the
* struct scic_sds_port object. This function notifies the SCI User that the phy has
* gone link up. none
*/
static void scic_sds_port_ready_operational_substate_link_up_handler(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
scic_sds_port_general_link_up_handler(sci_port, sci_phy, true);
}
/**
* scic_sds_port_ready_operational_substate_link_down_handler() -
* @sci_port: This is the struct scic_sds_port object that which has a phy that has
* gone link down.
* @sci_phy: This is the struct scic_sds_phy object that has gone link down.
*
* This method is the ready operational substate link down handler for the
* struct scic_sds_port object. This function notifies the SCI User that the phy has
* gone link down and if this is the last phy in the port the port will change
* state to the ready waiting substate. none
*/
static void scic_sds_port_ready_operational_substate_link_down_handler(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
scic_sds_port_deactivate_phy(sci_port, sci_phy, true);
/*
* If there are no active phys left in the port, then transition
* the port to the WAITING state until such time as a phy goes
* link up. */
if (sci_port->active_phy_mask == 0)
sci_base_state_machine_change_state(&sci_port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
}
/*
* This method is the ready operational substate start io handler for the
* struct scic_sds_port object. This function incremetns the outstanding request
* count for this port object. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_ready_operational_substate_start_io_handler(
struct scic_sds_port *port,
struct scic_sds_remote_device *device,
struct scic_sds_request *io_request)
{
port->started_request_count++;
return SCI_SUCCESS;
}
/*
* ****************************************************************************
* * READY SUBSTATE OPERATIONAL HANDLERS
* **************************************************************************** */
/*
* This is the default method for a port add phy request. It will report a
* warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE
*/
static enum sci_status scic_sds_port_ready_configuring_substate_add_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
enum sci_status status;
status = scic_sds_port_set_phy(port, phy);
if (status == SCI_SUCCESS) {
scic_sds_port_general_link_up_handler(port, phy, true);
/*
* Re-enter the configuring state since this may be the last phy in
* the port. */
sci_base_state_machine_change_state(
&port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
);
}
return status;
}
/*
* This is the default method for a port remove phy request. It will report a
* warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE
*/
static enum sci_status scic_sds_port_ready_configuring_substate_remove_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
enum sci_status status;
status = scic_sds_port_clear_phy(port, phy);
if (status == SCI_SUCCESS) {
scic_sds_port_deactivate_phy(port, phy, true);
/*
* Re-enter the configuring state since this may be the last phy in
* the port. */
sci_base_state_machine_change_state(
&port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
);
}
return status;
}
/**
* scic_sds_port_ready_configuring_substate_complete_io_handler() -
* @port: This is the port that is being requested to complete the io request.
* @device: This is the device on which the io is completing.
*
* This method will decrement the outstanding request count for this port. If
* the request count goes to 0 then the port can be reprogrammed with its new
* phy data.
*/
static enum sci_status
scic_sds_port_ready_configuring_substate_complete_io_handler(
struct scic_sds_port *port,
struct scic_sds_remote_device *device,
struct scic_sds_request *io_request)
{
scic_sds_port_decrement_request_count(port);
if (port->started_request_count == 0) {
sci_base_state_machine_change_state(
&port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL
);
}
return SCI_SUCCESS;
}
static enum sci_status default_port_handler(struct scic_sds_port *sci_port,
const char *func)
{
dev_warn(sciport_to_dev(sci_port),
"%s: in wrong state: %d\n", func,
sci_base_state_machine_get_state(&sci_port->state_machine));
return SCI_FAILURE_INVALID_STATE;
}
static enum sci_status
scic_sds_port_default_start_handler(struct scic_sds_port *sci_port)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status
scic_sds_port_default_stop_handler(struct scic_sds_port *sci_port)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status
scic_sds_port_default_destruct_handler(struct scic_sds_port *sci_port)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status
scic_sds_port_default_reset_handler(struct scic_sds_port *sci_port,
u32 timeout)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status
scic_sds_port_default_add_phy_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *base_phy)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status
scic_sds_port_default_remove_phy_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *base_phy)
{
return default_port_handler(sci_port, __func__);
}
/*
* This is the default method for a port unsolicited frame request. It will
* report a warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE Is it even
* possible to receive an unsolicited frame directed to a port object? It
* seems possible if we implementing virtual functions but until then?
*/
static enum sci_status
scic_sds_port_default_frame_handler(struct scic_sds_port *sci_port,
u32 frame_index)
{
struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port);
default_port_handler(sci_port, __func__);
scic_sds_controller_release_frame(scic, frame_index);
return SCI_FAILURE_INVALID_STATE;
}
static enum sci_status scic_sds_port_default_event_handler(struct scic_sds_port *sci_port,
u32 event_code)
{
return default_port_handler(sci_port, __func__);
}
static void scic_sds_port_default_link_up_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
default_port_handler(sci_port, __func__);
}
static void scic_sds_port_default_link_down_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
default_port_handler(sci_port, __func__);
}
static enum sci_status scic_sds_port_default_start_io_handler(struct scic_sds_port *sci_port,
struct scic_sds_remote_device *sci_dev,
struct scic_sds_request *sci_req)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status scic_sds_port_default_complete_io_handler(struct scic_sds_port *sci_port,
struct scic_sds_remote_device *sci_dev,
struct scic_sds_request *sci_req)
{
return default_port_handler(sci_port, __func__);
}
static struct scic_sds_port_state_handler
scic_sds_port_ready_substate_handler_table[SCIC_SDS_PORT_READY_MAX_SUBSTATES] = {
{
/* SCIC_SDS_PORT_READY_SUBSTATE_WAITING */
scic_sds_port_default_start_handler,
scic_sds_port_ready_substate_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_ready_substate_add_phy_handler,
scic_sds_port_default_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_ready_waiting_substate_link_up_handler,
scic_sds_port_default_link_down_handler,
scic_sds_port_ready_waiting_substate_start_io_handler,
scic_sds_port_ready_substate_complete_io_handler,
},
{
/* SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL */
scic_sds_port_default_start_handler,
scic_sds_port_ready_substate_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_ready_operational_substate_reset_handler,
scic_sds_port_ready_substate_add_phy_handler,
scic_sds_port_ready_substate_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_ready_operational_substate_link_up_handler,
scic_sds_port_ready_operational_substate_link_down_handler,
scic_sds_port_ready_operational_substate_start_io_handler,
scic_sds_port_ready_substate_complete_io_handler,
},
{
/* SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING */
scic_sds_port_default_start_handler,
scic_sds_port_ready_substate_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_ready_configuring_substate_add_phy_handler,
scic_sds_port_ready_configuring_substate_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_default_link_up_handler,
scic_sds_port_default_link_down_handler,
scic_sds_port_default_start_io_handler,
scic_sds_port_ready_configuring_substate_complete_io_handler
}
};
/**
* scic_sds_port_set_ready_state_handlers() -
*
* This macro sets the port ready substate handlers.
*/
#define scic_sds_port_set_ready_state_handlers(port, state_id) \
scic_sds_port_set_state_handlers(\
port, &scic_sds_port_ready_substate_handler_table[(state_id)] \
)
/*
* ******************************************************************************
* * PORT STATE PRIVATE METHODS
* ****************************************************************************** */
/**
*
* @sci_port: This is the struct scic_sds_port object to suspend.
*
* This method will susped the port task scheduler for this port object. none
*/
static void
scic_sds_port_suspend_port_task_scheduler(struct scic_sds_port *port)
{
u32 pts_control_value;
pts_control_value = readl(&port->port_task_scheduler_registers->control);
pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND);
writel(pts_control_value, &port->port_task_scheduler_registers->control);
}
/**
* scic_sds_port_post_dummy_request() - post dummy/workaround request
* @sci_port: port to post task
*
* Prevent the hardware scheduler from posting new requests to the front
* of the scheduler queue causing a starvation problem for currently
* ongoing requests.
*
*/
static void scic_sds_port_post_dummy_request(struct scic_sds_port *sci_port)
{
u32 command;
struct scu_task_context *task_context;
struct scic_sds_controller *scic = sci_port->owning_controller;
u16 tci = sci_port->reserved_tci;
task_context = scic_sds_controller_get_task_context_buffer(scic, tci);
task_context->abort = 0;
command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
tci;
scic_sds_controller_post_request(scic, command);
}
/**
* This routine will abort the dummy request. This will alow the hardware to
* power down parts of the silicon to save power.
*
* @sci_port: The port on which the task must be aborted.
*
*/
static void scic_sds_port_abort_dummy_request(struct scic_sds_port *sci_port)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
u16 tci = sci_port->reserved_tci;
struct scu_task_context *tc;
u32 command;
tc = scic_sds_controller_get_task_context_buffer(scic, tci);
tc->abort = 1;
command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT |
sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
tci;
scic_sds_controller_post_request(scic, command);
}
/**
*
* @sci_port: This is the struct scic_sds_port object to resume.
*
* This method will resume the port task scheduler for this port object. none
*/
static void
scic_sds_port_resume_port_task_scheduler(struct scic_sds_port *port)
{
u32 pts_control_value;
pts_control_value = readl(&port->port_task_scheduler_registers->control);
pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND);
writel(pts_control_value, &port->port_task_scheduler_registers->control);
}
/*
* ******************************************************************************
* * PORT READY SUBSTATE METHODS
* ****************************************************************************** */
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* entering the SCIC_SDS_PORT_READY_SUBSTATE_WAITING. This function checks the
* port for any ready phys. If there is at least one phy in a ready state then
* the port transitions to the ready operational substate. none
*/
static void scic_sds_port_ready_substate_waiting_enter(void *object)
{
struct scic_sds_port *sci_port = object;
scic_sds_port_set_ready_state_handlers(
sci_port, SCIC_SDS_PORT_READY_SUBSTATE_WAITING
);
scic_sds_port_suspend_port_task_scheduler(sci_port);
sci_port->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS;
if (sci_port->active_phy_mask != 0) {
/* At least one of the phys on the port is ready */
sci_base_state_machine_change_state(
&sci_port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL
);
}
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This function will perform the actions required by the struct scic_sds_port
* on entering the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function sets
* the state handlers for the port object, notifies the SCI User that the port
* is ready, and resumes port operations. none
*/
static void scic_sds_port_ready_substate_operational_enter(void *object)
{
u32 index;
struct scic_sds_port *sci_port = object;
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
struct isci_port *iport = sci_port_to_iport(sci_port);
scic_sds_port_set_ready_state_handlers(
sci_port,
SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
isci_port_ready(ihost, iport);
for (index = 0; index < SCI_MAX_PHYS; index++) {
if (sci_port->phy_table[index]) {
writel(sci_port->physical_port_index,
&sci_port->port_pe_configuration_register[
sci_port->phy_table[index]->phy_index]);
}
}
scic_sds_port_update_viit_entry(sci_port);
scic_sds_port_resume_port_task_scheduler(sci_port);
/*
* Post the dummy task for the port so the hardware can schedule
* io correctly
*/
scic_sds_port_post_dummy_request(sci_port);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports
* the port not ready and suspends the port task scheduler. none
*/
static void scic_sds_port_ready_substate_operational_exit(void *object)
{
struct scic_sds_port *sci_port = object;
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
struct isci_port *iport = sci_port_to_iport(sci_port);
/*
* Kill the dummy task for this port if it has not yet posted
* the hardware will treat this as a NOP and just return abort
* complete.
*/
scic_sds_port_abort_dummy_request(sci_port);
isci_port_not_ready(ihost, iport);
}
/*
* ******************************************************************************
* * PORT READY CONFIGURING METHODS
* ****************************************************************************** */
/**
* scic_sds_port_ready_substate_configuring_enter() -
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports
* the port not ready and suspends the port task scheduler. none
*/
static void scic_sds_port_ready_substate_configuring_enter(void *object)
{
struct scic_sds_port *sci_port = object;
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
struct isci_port *iport = sci_port_to_iport(sci_port);
scic_sds_port_set_ready_state_handlers(
sci_port,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
if (sci_port->active_phy_mask == 0) {
isci_port_not_ready(ihost, iport);
sci_base_state_machine_change_state(
&sci_port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
} else if (sci_port->started_request_count == 0)
sci_base_state_machine_change_state(
&sci_port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
}
static void scic_sds_port_ready_substate_configuring_exit(void *object)
{
struct scic_sds_port *sci_port = object;
scic_sds_port_suspend_port_task_scheduler(sci_port);
}
/* --------------------------------------------------------------------------- */
static const struct sci_base_state scic_sds_port_ready_substate_table[] = {
[SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = {
.enter_state = scic_sds_port_ready_substate_waiting_enter,
},
[SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = {
.enter_state = scic_sds_port_ready_substate_operational_enter,
.exit_state = scic_sds_port_ready_substate_operational_exit
},
[SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = {
.enter_state = scic_sds_port_ready_substate_configuring_enter,
.exit_state = scic_sds_port_ready_substate_configuring_exit
},
};
/**
*
* @port: This is the struct scic_sds_port object on which the io request count will
* be decremented.
* @device: This is the struct scic_sds_remote_device object to which the io request
* is being directed. This parameter is not required to complete this
* operation.
* @io_request: This is the request that is being completed on this port
* object. This parameter is not required to complete this operation.
*
* This is a general complete io request handler for the struct scic_sds_port object.
* enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_general_complete_io_handler(
struct scic_sds_port *port,
struct scic_sds_remote_device *device,
struct scic_sds_request *io_request)
{
scic_sds_port_decrement_request_count(port);
return SCI_SUCCESS;
}
/**
* scic_sds_port_stopped_state_start_handler() - stop a port from "started"
*
* @port: This is the struct scic_sds_port object which is cast into a
* struct scic_sds_port object.
*
* This function takes the struct scic_sds_port from a stopped state and
* attempts to start it. To start a port it must have no assiged devices and
* it must have at least one phy assigned to it. If those conditions are
* met then the port can transition to the ready state.
* enum sci_status
* SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION
* This struct scic_sds_port object could not be started because the port
* configuration is not valid.
* SCI_SUCCESS
* the start request is successful and the struct scic_sds_port object
* has transitioned to the SCI_BASE_PORT_STATE_READY.
*/
static enum sci_status
scic_sds_port_stopped_state_start_handler(struct scic_sds_port *sci_port)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
enum sci_status status = SCI_SUCCESS;
u32 phy_mask;
if (sci_port->assigned_device_count > 0) {
/*
* @todo This is a start failure operation because
* there are still devices assigned to this port.
* There must be no devices assigned to a port on a
* start operation.
*/
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
sci_port->timer_handle =
isci_timer_create(ihost,
sci_port,
scic_sds_port_timeout_handler);
if (!sci_port->timer_handle)
return SCI_FAILURE_INSUFFICIENT_RESOURCES;
if (sci_port->reserved_rni == SCU_DUMMY_INDEX) {
u16 rni = scic_sds_remote_node_table_allocate_remote_node(
&scic->available_remote_nodes, 1);
if (rni != SCU_DUMMY_INDEX)
scic_sds_port_construct_dummy_rnc(sci_port, rni);
else
status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
sci_port->reserved_rni = rni;
}
if (sci_port->reserved_tci == SCU_DUMMY_INDEX) {
/* Allocate a TCI and remove the sequence nibble */
u16 tci = scic_controller_allocate_io_tag(scic);
if (tci != SCU_DUMMY_INDEX)
scic_sds_port_construct_dummy_task(sci_port, tci);
else
status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
sci_port->reserved_tci = tci;
}
if (status == SCI_SUCCESS) {
phy_mask = scic_sds_port_get_phys(sci_port);
/*
* There are one or more phys assigned to this port. Make sure
* the port's phy mask is in fact legal and supported by the
* silicon.
*/
if (scic_sds_port_is_phy_mask_valid(sci_port, phy_mask) == true) {
sci_base_state_machine_change_state(
&sci_port->state_machine,
SCI_BASE_PORT_STATE_READY);
return SCI_SUCCESS;
} else
status = SCI_FAILURE;
}
if (status != SCI_SUCCESS)
scic_sds_port_destroy_dummy_resources(sci_port);
return status;
}
/*
* This method takes the struct scic_sds_port that is in a stopped state and handles a
* stop request. This function takes no action. enum sci_status SCI_SUCCESS the
* stop request is successful as the struct scic_sds_port object is already stopped.
*/
static enum sci_status scic_sds_port_stopped_state_stop_handler(
struct scic_sds_port *port)
{
/* We are already stopped so there is nothing to do here */
return SCI_SUCCESS;
}
/*
* This method takes the struct scic_sds_port that is in a stopped state and handles
* the destruct request. The stopped state is the only state in which the
* struct scic_sds_port can be destroyed. This function causes the port object to
* transition to the SCI_BASE_PORT_STATE_FINAL. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_stopped_state_destruct_handler(
struct scic_sds_port *port)
{
sci_base_state_machine_stop(&port->state_machine);
return SCI_SUCCESS;
}
/*
* This method takes the struct scic_sds_port that is in a stopped state and handles
* the add phy request. In MPC mode the only time a phy can be added to a port
* is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status
* SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not
* be added to the port. SCI_SUCCESS if the phy is added to the port.
*/
static enum sci_status scic_sds_port_stopped_state_add_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
struct sci_sas_address port_sas_address;
/* Read the port assigned SAS Address if there is one */
scic_sds_port_get_sas_address(port, &port_sas_address);
if (port_sas_address.high != 0 && port_sas_address.low != 0) {
struct sci_sas_address phy_sas_address;
/*
* Make sure that the PHY SAS Address matches the SAS Address
* for this port. */
scic_sds_phy_get_sas_address(phy, &phy_sas_address);
if (
(port_sas_address.high != phy_sas_address.high)
|| (port_sas_address.low != phy_sas_address.low)
) {
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
}
return scic_sds_port_set_phy(port, phy);
}
/*
* This method takes the struct scic_sds_port that is in a stopped state and handles
* the remove phy request. In MPC mode the only time a phy can be removed from
* a port is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status
* SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not
* be added to the port. SCI_SUCCESS if the phy is added to the port.
*/
static enum sci_status scic_sds_port_stopped_state_remove_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
return scic_sds_port_clear_phy(port, phy);
}
/*
* ****************************************************************************
* * READY STATE HANDLERS
* **************************************************************************** */
/*
* ****************************************************************************
* * RESETTING STATE HANDLERS
* **************************************************************************** */
/*
* ****************************************************************************
* * STOPPING STATE HANDLERS
* **************************************************************************** */
/*
* This method takes the struct scic_sds_port that is in a stopping state and handles
* the complete io request. Should the request count reach 0 then the port
* object will transition to the stopped state. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_stopping_state_complete_io_handler(
struct scic_sds_port *sci_port,
struct scic_sds_remote_device *device,
struct scic_sds_request *io_request)
{
scic_sds_port_decrement_request_count(sci_port);
if (sci_port->started_request_count == 0) {
sci_base_state_machine_change_state(&sci_port->state_machine,
SCI_BASE_PORT_STATE_STOPPED);
}
return SCI_SUCCESS;
}
/*
* ****************************************************************************
* * RESETTING STATE HANDLERS
* **************************************************************************** */
/**
*
* @port: This is the port object which is being requested to stop.
*
* This method will stop a failed port. This causes a transition to the
* stopping state. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_reset_state_stop_handler(
struct scic_sds_port *port)
{
sci_base_state_machine_change_state(
&port->state_machine,
SCI_BASE_PORT_STATE_STOPPING
);
return SCI_SUCCESS;
}
/*
* This method will transition a failed port to its ready state. The port
* failed because a hard reset request timed out but at some time later one or
* more phys in the port became ready. enum sci_status SCI_SUCCESS
*/
static void scic_sds_port_reset_state_link_up_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
/*
* / @todo We should make sure that the phy that has gone link up is the same
* / one on which we sent the reset. It is possible that the phy on
* / which we sent the reset is not the one that has gone link up and we
* / want to make sure that phy being reset comes back. Consider the
* / case where a reset is sent but before the hardware processes the
* / reset it get a link up on the port because of a hot plug event.
* / because of the reset request this phy will go link down almost
* / immediately. */
/*
* In the resetting state we don't notify the user regarding
* link up and link down notifications. */
scic_sds_port_general_link_up_handler(port, phy, false);
}
/*
* This method process link down notifications that occur during a port reset
* operation. Link downs can occur during the reset operation. enum sci_status
* SCI_SUCCESS
*/
static void scic_sds_port_reset_state_link_down_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
/*
* In the resetting state we don't notify the user regarding
* link up and link down notifications. */
scic_sds_port_deactivate_phy(port, phy, false);
}
static struct scic_sds_port_state_handler
scic_sds_port_state_handler_table[SCI_BASE_PORT_MAX_STATES] =
{
/* SCI_BASE_PORT_STATE_STOPPED */
{
scic_sds_port_stopped_state_start_handler,
scic_sds_port_stopped_state_stop_handler,
scic_sds_port_stopped_state_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_stopped_state_add_phy_handler,
scic_sds_port_stopped_state_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_default_link_up_handler,
scic_sds_port_default_link_down_handler,
scic_sds_port_default_start_io_handler,
scic_sds_port_default_complete_io_handler
},
/* SCI_BASE_PORT_STATE_STOPPING */
{
scic_sds_port_default_start_handler,
scic_sds_port_default_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_default_add_phy_handler,
scic_sds_port_default_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_default_link_up_handler,
scic_sds_port_default_link_down_handler,
scic_sds_port_default_start_io_handler,
scic_sds_port_stopping_state_complete_io_handler
},
/* SCI_BASE_PORT_STATE_READY */
{
scic_sds_port_default_start_handler,
scic_sds_port_default_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_default_add_phy_handler,
scic_sds_port_default_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_default_link_up_handler,
scic_sds_port_default_link_down_handler,
scic_sds_port_default_start_io_handler,
scic_sds_port_general_complete_io_handler
},
/* SCI_BASE_PORT_STATE_RESETTING */
{
scic_sds_port_default_start_handler,
scic_sds_port_reset_state_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_default_add_phy_handler,
scic_sds_port_default_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_reset_state_link_up_handler,
scic_sds_port_reset_state_link_down_handler,
scic_sds_port_default_start_io_handler,
scic_sds_port_general_complete_io_handler
},
/* SCI_BASE_PORT_STATE_FAILED */
{
scic_sds_port_default_start_handler,
scic_sds_port_default_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_default_add_phy_handler,
scic_sds_port_default_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_default_link_up_handler,
scic_sds_port_default_link_down_handler,
scic_sds_port_default_start_io_handler,
scic_sds_port_general_complete_io_handler
}
};
/*
* ******************************************************************************
* * PORT STATE PRIVATE METHODS
* ****************************************************************************** */
/**
*
* @sci_port: This is the port object which to suspend.
*
* This method will enable the SCU Port Task Scheduler for this port object but
* will leave the port task scheduler in a suspended state. none
*/
static void
scic_sds_port_enable_port_task_scheduler(struct scic_sds_port *port)
{
u32 pts_control_value;
pts_control_value = readl(&port->port_task_scheduler_registers->control);
pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND);
writel(pts_control_value, &port->port_task_scheduler_registers->control);
}
/**
*
* @sci_port: This is the port object which to resume.
*
* This method will disable the SCU port task scheduler for this port object.
* none
*/
static void
scic_sds_port_disable_port_task_scheduler(struct scic_sds_port *port)
{
u32 pts_control_value;
pts_control_value = readl(&port->port_task_scheduler_registers->control);
pts_control_value &=
~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND));
writel(pts_control_value, &port->port_task_scheduler_registers->control);
}
static void scic_sds_port_post_dummy_remote_node(struct scic_sds_port *sci_port)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
u8 phys_index = sci_port->physical_port_index;
union scu_remote_node_context *rnc;
u16 rni = sci_port->reserved_rni;
u32 command;
rnc = &scic->remote_node_context_table[rni];
rnc->ssp.is_valid = true;
command = SCU_CONTEXT_COMMAND_POST_RNC_32 |
phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
scic_sds_controller_post_request(scic, command);
/* ensure hardware has seen the post rnc command and give it
* ample time to act before sending the suspend
*/
readl(&scic->smu_registers->interrupt_status); /* flush */
udelay(10);
command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX |
phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
scic_sds_controller_post_request(scic, command);
}
static void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port *sci_port)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
u8 phys_index = sci_port->physical_port_index;
union scu_remote_node_context *rnc;
u16 rni = sci_port->reserved_rni;
u32 command;
rnc = &scic->remote_node_context_table[rni];
rnc->ssp.is_valid = false;
/* ensure the preceding tc abort request has reached the
* controller and give it ample time to act before posting the rnc
* invalidate
*/
readl(&scic->smu_registers->interrupt_status); /* flush */
udelay(10);
command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE |
phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
scic_sds_controller_post_request(scic, command);
}
/*
* ******************************************************************************
* * PORT STATE METHODS
* ****************************************************************************** */
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* entering the SCI_BASE_PORT_STATE_STOPPED. This function sets the stopped
* state handlers for the struct scic_sds_port object and disables the port task
* scheduler in the hardware. none
*/
static void scic_sds_port_stopped_state_enter(void *object)
{
struct scic_sds_port *sci_port = object;
scic_sds_port_set_base_state_handlers(
sci_port, SCI_BASE_PORT_STATE_STOPPED
);
if (
SCI_BASE_PORT_STATE_STOPPING
== sci_port->state_machine.previous_state_id
) {
/*
* If we enter this state becasuse of a request to stop
* the port then we want to disable the hardwares port
* task scheduler. */
scic_sds_port_disable_port_task_scheduler(sci_port);
}
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* exiting the SCI_BASE_STATE_STOPPED. This function enables the SCU hardware
* port task scheduler. none
*/
static void scic_sds_port_stopped_state_exit(void *object)
{
struct scic_sds_port *sci_port = object;
/* Enable and suspend the port task scheduler */
scic_sds_port_enable_port_task_scheduler(sci_port);
}
/**
* scic_sds_port_ready_state_enter -
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* entering the SCI_BASE_PORT_STATE_READY. This function sets the ready state
* handlers for the struct scic_sds_port object, reports the port object as
* not ready and starts the ready substate machine. none
*/
static void scic_sds_port_ready_state_enter(void *object)
{
struct scic_sds_port *sci_port = object;
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
struct isci_port *iport = sci_port_to_iport(sci_port);
u32 prev_state;
/* Put the ready state handlers in place though they will not be there long */
scic_sds_port_set_base_state_handlers(sci_port, SCI_BASE_PORT_STATE_READY);
prev_state = sci_port->state_machine.previous_state_id;
if (prev_state == SCI_BASE_PORT_STATE_RESETTING)
isci_port_hard_reset_complete(iport, SCI_SUCCESS);
else
isci_port_not_ready(ihost, iport);
/* Post and suspend the dummy remote node context for this port. */
scic_sds_port_post_dummy_remote_node(sci_port);
/* Start the ready substate machine */
sci_base_state_machine_start(&sci_port->ready_substate_machine);
}
static void scic_sds_port_ready_state_exit(void *object)
{
struct scic_sds_port *sci_port = object;
sci_base_state_machine_stop(&sci_port->ready_substate_machine);
scic_sds_port_invalidate_dummy_remote_node(sci_port);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* entering the SCI_BASE_PORT_STATE_RESETTING. This function sets the resetting
* state handlers for the struct scic_sds_port object. none
*/
static void scic_sds_port_resetting_state_enter(void *object)
{
struct scic_sds_port *sci_port = object;
scic_sds_port_set_base_state_handlers(
sci_port, SCI_BASE_PORT_STATE_RESETTING
);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This function will perform the actions required by the
* struct scic_sds_port on
* exiting the SCI_BASE_STATE_RESETTING. This function does nothing. none
*/
static inline void scic_sds_port_resetting_state_exit(void *object)
{
struct scic_sds_port *sci_port = object;
isci_timer_stop(sci_port->timer_handle);
}
/**
*
* @object: This is the void object which is cast to a
* struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping
* state handlers for the struct scic_sds_port object. none
*/
static void scic_sds_port_stopping_state_enter(void *object)
{
struct scic_sds_port *sci_port = object;
scic_sds_port_set_base_state_handlers(
sci_port, SCI_BASE_PORT_STATE_STOPPING
);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This function will perform the actions required by the
* struct scic_sds_port on
* exiting the SCI_BASE_STATE_STOPPING. This function does nothing. none
*/
static inline void
scic_sds_port_stopping_state_exit(void *object)
{
struct scic_sds_port *sci_port = object;
isci_timer_stop(sci_port->timer_handle);
scic_sds_port_destroy_dummy_resources(sci_port);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This function will perform the actions required by the
* struct scic_sds_port on
* entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping
* state handlers for the struct scic_sds_port object. none
*/
static void scic_sds_port_failed_state_enter(void *object)
{
struct scic_sds_port *sci_port = object;
struct isci_port *iport = sci_port_to_iport(sci_port);
scic_sds_port_set_base_state_handlers(sci_port,
SCI_BASE_PORT_STATE_FAILED);
isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT);
}
/* --------------------------------------------------------------------------- */
static const struct sci_base_state scic_sds_port_state_table[] = {
[SCI_BASE_PORT_STATE_STOPPED] = {
.enter_state = scic_sds_port_stopped_state_enter,
.exit_state = scic_sds_port_stopped_state_exit
},
[SCI_BASE_PORT_STATE_STOPPING] = {
.enter_state = scic_sds_port_stopping_state_enter,
.exit_state = scic_sds_port_stopping_state_exit
},
[SCI_BASE_PORT_STATE_READY] = {
.enter_state = scic_sds_port_ready_state_enter,
.exit_state = scic_sds_port_ready_state_exit
},
[SCI_BASE_PORT_STATE_RESETTING] = {
.enter_state = scic_sds_port_resetting_state_enter,
.exit_state = scic_sds_port_resetting_state_exit
},
[SCI_BASE_PORT_STATE_FAILED] = {
.enter_state = scic_sds_port_failed_state_enter,
}
};
void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 index,
struct scic_sds_controller *scic)
{
sci_base_state_machine_construct(&sci_port->state_machine,
sci_port,
scic_sds_port_state_table,
SCI_BASE_PORT_STATE_STOPPED);
sci_base_state_machine_start(&sci_port->state_machine);
sci_base_state_machine_construct(&sci_port->ready_substate_machine,
sci_port,
scic_sds_port_ready_substate_table,
SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
sci_port->logical_port_index = SCIC_SDS_DUMMY_PORT;
sci_port->physical_port_index = index;
sci_port->active_phy_mask = 0;
sci_port->owning_controller = scic;
sci_port->started_request_count = 0;
sci_port->assigned_device_count = 0;
sci_port->reserved_rni = SCU_DUMMY_INDEX;
sci_port->reserved_tci = SCU_DUMMY_INDEX;
sci_port->timer_handle = NULL;
sci_port->port_task_scheduler_registers = NULL;
for (index = 0; index < SCI_MAX_PHYS; index++)
sci_port->phy_table[index] = NULL;
}
drivers/scsi/isci/core/scic_sds_port.h deleted 100644 → 0
View file @ d35bc1bd
/*
* 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.
*/
#ifndef _SCIC_SDS_PORT_H_
#define _SCIC_SDS_PORT_H_
#include <linux/kernel.h>
#include "isci.h"
#include "sas.h"
#include "registers.h"
#include "state_machine.h"
struct scic_sds_controller;
struct scic_sds_phy;
struct scic_sds_remote_device;
struct scic_sds_request;
#define SCIC_SDS_DUMMY_PORT 0xFF
/**
* enum SCIC_SDS_PORT_READY_SUBSTATES -
*
* This enumeration depicts all of the states for the core port ready substate
* machine.
*/
enum scic_sds_port_ready_substates {
/**
* The substate where the port is started and ready but has no
* active phys.
*/
SCIC_SDS_PORT_READY_SUBSTATE_WAITING,
/**
* The substate where the port is started and ready and there is
* at least one phy operational.
*/
SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL,
/**
* The substate where the port is started and there was an
* add/remove phy event. This state is only used in Automatic
* Port Configuration Mode (APC)
*/
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING,
SCIC_SDS_PORT_READY_MAX_SUBSTATES
};
/**
* enum scic_sds_port_states - This enumeration depicts all the states for the
* common port state machine.
*
*
*/
enum scic_sds_port_states {
/**
* This state indicates that the port has successfully been stopped.
* In this state no new IO operations are permitted.
* This state is entered from the STOPPING state.
*/
SCI_BASE_PORT_STATE_STOPPED,
/**
* This state indicates that the port is in the process of stopping.
* In this state no new IO operations are permitted, but existing IO
* operations are allowed to complete.
* This state is entered from the READY state.
*/
SCI_BASE_PORT_STATE_STOPPING,
/**
* This state indicates the port is now ready. Thus, the user is
* able to perform IO operations on this port.
* This state is entered from the STARTING state.
*/
SCI_BASE_PORT_STATE_READY,
/**
* This state indicates the port is in the process of performing a hard
* reset. Thus, the user is unable to perform IO operations on this
* port.
* This state is entered from the READY state.
*/
SCI_BASE_PORT_STATE_RESETTING,
/**
* This state indicates the port has failed a reset request. This state
* is entered when a port reset request times out.
* This state is entered from the RESETTING state.
*/
SCI_BASE_PORT_STATE_FAILED,
SCI_BASE_PORT_MAX_STATES
};
/**
* struct scic_sds_port
*
* The core port object provides the the abstraction for an SCU port.
*/
struct scic_sds_port {
/**
* This field contains the information for the base port state machine.
*/
struct sci_base_state_machine state_machine;
/**
* This field is the port index that is reported to the SCI USER.
* This allows the actual hardware physical port to change without
* the SCI USER getting a different answer for the get port index.
*/
u8 logical_port_index;
/**
* This field is the port index used to program the SCU hardware.
*/
u8 physical_port_index;
/**
* This field contains the active phy mask for the port.
* This mask is used in conjunction with the phy state to determine
* which phy to select for some port operations.
*/
u8 active_phy_mask;
u16 reserved_rni;
u16 reserved_tci;
/**
* This field contains the count of the io requests started on this port
* object. It is used to control controller shutdown.
*/
u32 started_request_count;
/**
* This field contains the number of devices assigned to this port.
* It is used to control port start requests.
*/
u32 assigned_device_count;
/**
* This field contains the reason for the port not going ready. It is
* assigned in the state handlers and used in the state transition.
*/
u32 not_ready_reason;
/**
* This field is the table of phys assigned to the port.
*/
struct scic_sds_phy *phy_table[SCI_MAX_PHYS];
/**
* This field is a pointer back to the controller that owns this
* port object.
*/
struct scic_sds_controller *owning_controller;
/**
* This field contains the port start/stop timer handle.
*/
void *timer_handle;
/**
* This field points to the current set of state handlers for this port
* object. These state handlers are assigned at each enter state of
* the state machine.
*/
struct scic_sds_port_state_handler *state_handlers;
/**
* This field is the ready substate machine for the port.
*/
struct sci_base_state_machine ready_substate_machine;
/* / Memory mapped hardware register space */
/**
* This field is the pointer to the port task scheduler registers
* for the SCU hardware.
*/
struct scu_port_task_scheduler_registers __iomem
*port_task_scheduler_registers;
/**
* This field is identical for all port objects and points to the port
* task scheduler group PE configuration registers.
* It is used to assign PEs to a port.
*/
u32 __iomem *port_pe_configuration_register;
/**
* This field is the VIIT register space for ths port object.
*/
struct scu_viit_entry __iomem *viit_registers;
};
typedef enum sci_status (*scic_sds_port_handler_t)(struct scic_sds_port *);
typedef enum sci_status (*scic_sds_port_phy_handler_t)(struct scic_sds_port *,
struct scic_sds_phy *);
typedef enum sci_status (*scic_sds_port_reset_handler_t)(struct scic_sds_port *,
u32 timeout);
typedef enum sci_status (*scic_sds_port_event_handler_t)(struct scic_sds_port *, u32);
typedef enum sci_status (*scic_sds_port_frame_handler_t)(struct scic_sds_port *, u32);
typedef void (*scic_sds_port_link_handler_t)(struct scic_sds_port *, struct scic_sds_phy *);
typedef enum sci_status (*scic_sds_port_io_request_handler_t)(struct scic_sds_port *,
struct scic_sds_remote_device *,
struct scic_sds_request *);
struct scic_sds_port_state_handler {
/**
* The start_handler specifies the method invoked when a user
* attempts to start a port.
*/
scic_sds_port_handler_t start_handler;
/**
* The stop_handler specifies the method invoked when a user
* attempts to stop a port.
*/
scic_sds_port_handler_t stop_handler;
/**
* The destruct_handler specifies the method invoked when attempting to
* destruct a port.
*/
scic_sds_port_handler_t destruct_handler;
/**
* The reset_handler specifies the method invoked when a user
* attempts to hard reset a port.
*/
scic_sds_port_reset_handler_t reset_handler;
/**
* The add_phy_handler specifies the method invoked when a user
* attempts to add another phy into the port.
*/
scic_sds_port_phy_handler_t add_phy_handler;
/**
* The remove_phy_handler specifies the method invoked when a user
* attempts to remove a phy from the port.
*/
scic_sds_port_phy_handler_t remove_phy_handler;
scic_sds_port_frame_handler_t frame_handler;
scic_sds_port_event_handler_t event_handler;
scic_sds_port_link_handler_t link_up_handler;
scic_sds_port_link_handler_t link_down_handler;
scic_sds_port_io_request_handler_t start_io_handler;
scic_sds_port_io_request_handler_t complete_io_handler;
};
/**
* scic_sds_port_get_controller() -
*
* Helper macro to get the owning controller of this port
*/
#define scic_sds_port_get_controller(this_port) \
((this_port)->owning_controller)
/**
* scic_sds_port_set_base_state_handlers() -
*
* This macro will change the state handlers to those of the specified state id
*/
#define scic_sds_port_set_base_state_handlers(this_port, state_id) \
scic_sds_port_set_state_handlers(\
(this_port), &scic_sds_port_state_handler_table[(state_id)])
/**
* scic_sds_port_set_state_handlers() -
*
* Helper macro to set the port object state handlers
*/
#define scic_sds_port_set_state_handlers(this_port, handlers) \
((this_port)->state_handlers = (handlers))
/**
* scic_sds_port_get_index() -
*
* This macro returns the physical port index for this port object
*/
#define scic_sds_port_get_index(this_port) \
((this_port)->physical_port_index)
static inline void scic_sds_port_decrement_request_count(struct scic_sds_port *sci_port)
{
if (WARN_ONCE(sci_port->started_request_count == 0,
"%s: tried to decrement started_request_count past 0!?",
__func__))
/* pass */;
else
sci_port->started_request_count--;
}
#define scic_sds_port_active_phy(port, phy) \
(((port)->active_phy_mask & (1 << (phy)->phy_index)) != 0)
void scic_sds_port_construct(
struct scic_sds_port *sci_port,
u8 port_index,
struct scic_sds_controller *scic);
enum sci_status scic_sds_port_initialize(
struct scic_sds_port *sci_port,
void __iomem *port_task_scheduler_registers,
void __iomem *port_configuration_regsiter,
void __iomem *viit_registers);
enum sci_status scic_sds_port_add_phy(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
enum sci_status scic_sds_port_remove_phy(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
void scic_sds_port_setup_transports(
struct scic_sds_port *sci_port,
u32 device_id);
void scic_sds_port_deactivate_phy(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy,
bool do_notify_user);
bool scic_sds_port_link_detected(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
void scic_sds_port_link_up(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
void scic_sds_port_link_down(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
enum sci_status scic_sds_port_start_io(
struct scic_sds_port *sci_port,
struct scic_sds_remote_device *sci_dev,
struct scic_sds_request *sci_req);
enum sci_status scic_sds_port_complete_io(
struct scic_sds_port *sci_port,
struct scic_sds_remote_device *sci_dev,
struct scic_sds_request *sci_req);
enum sas_linkrate scic_sds_port_get_max_allowed_speed(
struct scic_sds_port *sci_port);
void scic_sds_port_broadcast_change_received(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
bool scic_sds_port_is_valid_phy_assignment(
struct scic_sds_port *sci_port,
u32 phy_index);
void scic_sds_port_get_sas_address(
struct scic_sds_port *sci_port,
struct sci_sas_address *sas_address);
void scic_sds_port_get_attached_sas_address(
struct scic_sds_port *sci_port,
struct sci_sas_address *sas_address);
#endif /* _SCIC_SDS_PORT_H_ */
drivers/scsi/isci/core/scic_sds_port_configuration_agent.h deleted 100644 → 0
View file @ d35bc1bd
/*
* 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.
*/
#ifndef _SCIC_SDS_PORT_CONFIGURATION_AGENT_H_
#define _SCIC_SDS_PORT_CONFIGURATION_AGENT_H_
/**
* This file contains the structures, constants and prototypes used for the
* core controller automatic port configuration engine.
*
*
*/
#include "scic_sds_port.h"
struct scic_sds_controller;
struct scic_sds_port_configuration_agent;
struct scic_sds_port;
struct scic_sds_phy;
typedef void (*scic_sds_port_configuration_agent_phy_handler_t)(
struct scic_sds_controller *,
struct scic_sds_port_configuration_agent *,
struct scic_sds_port *,
struct scic_sds_phy *
);
struct SCIC_SDS_PORT_RANGE {
u8 min_index;
u8 max_index;
};
struct scic_sds_port_configuration_agent {
u16 phy_configured_mask;
u16 phy_ready_mask;
struct SCIC_SDS_PORT_RANGE phy_valid_port_range[SCI_MAX_PHYS];
bool timer_pending;
scic_sds_port_configuration_agent_phy_handler_t link_up_handler;
scic_sds_port_configuration_agent_phy_handler_t link_down_handler;
void *timer;
};
void scic_sds_port_configuration_agent_construct(
struct scic_sds_port_configuration_agent *port_agent);
enum sci_status scic_sds_port_configuration_agent_initialize(
struct scic_sds_controller *controller,
struct scic_sds_port_configuration_agent *port_agent);
#endif /* _SCIC_SDS_PORT_CONFIGURATION_AGENT_H_ */
drivers/scsi/isci/host.c
View file @ e2f8db50
......@@ -61,7 +61,6 @@
#include "probe_roms.h"
#include "remote_device.h"
#include "request.h"
#include "scic_sds_port_configuration_agent.h"
#include "scu_completion_codes.h"
#include "scu_event_codes.h"
#include "registers.h"
......
drivers/scsi/isci/host.h
View file @ e2f8db50
......@@ -55,7 +55,6 @@
#ifndef _SCI_HOST_H_
#define _SCI_HOST_H_
#include "scic_config_parameters.h"
#include "remote_device.h"
#include "phy.h"
#include "pool.h"
......@@ -64,11 +63,12 @@
#include "registers.h"
#include "scu_unsolicited_frame.h"
#include "unsolicited_frame_control.h"
#include "scic_sds_port_configuration_agent.h"
#include "probe_roms.h"
struct scic_sds_request;
struct scu_task_context;
/**
* struct scic_power_control -
*
......@@ -107,6 +107,24 @@ struct scic_power_control {
};
struct scic_sds_port_configuration_agent;
typedef void (*port_config_fn)(struct scic_sds_controller *,
struct scic_sds_port_configuration_agent *,
struct scic_sds_port *, struct scic_sds_phy *);
struct scic_sds_port_configuration_agent {
u16 phy_configured_mask;
u16 phy_ready_mask;
struct {
u8 min_index;
u8 max_index;
} phy_valid_port_range[SCI_MAX_PHYS];
bool timer_pending;
port_config_fn link_up_handler;
port_config_fn link_down_handler;
void *timer;
};
/**
* struct scic_sds_controller -
*
......@@ -800,4 +818,11 @@ u16 scic_controller_allocate_io_tag(
enum sci_status scic_controller_free_io_tag(
struct scic_sds_controller *scic,
u16 io_tag);
void scic_sds_port_configuration_agent_construct(
struct scic_sds_port_configuration_agent *port_agent);
enum sci_status scic_sds_port_configuration_agent_initialize(
struct scic_sds_controller *controller,
struct scic_sds_port_configuration_agent *port_agent);
#endif
drivers/scsi/isci/phy.c
View file @ e2f8db50
......@@ -57,9 +57,8 @@
#include "host.h"
#include "phy.h"
#include "scu_event_codes.h"
#include "scic_port.h"
#include "scic_config_parameters.h"
#include "timers.h"
#include "probe_roms.h"
/* Maximum arbitration wait time in micro-seconds */
#define SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME (700)
......
drivers/scsi/isci/phy.h
View file @ e2f8db50
......@@ -58,6 +58,7 @@
#include <scsi/sas.h>
#include <scsi/libsas.h>
#include "state_machine.h"
#include "sas.h"
/* This is the timeout value for the SATA phy to wait for a SIGNATURE FIS
* before restarting the starting state machine. Technically, the old parallel
......
drivers/scsi/isci/port.c
View file @ e2f8db50
......@@ -53,11 +53,13 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/workqueue.h>
#include "isci.h"
#include "scic_port.h"
#include "port.h"
#include "request.h"
#include "timers.h"
#define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000)
#define SCU_DUMMY_INDEX (0xFFFF)
static void isci_port_change_state(struct isci_port *iport, enum isci_status status)
{
......@@ -73,42 +75,85 @@ static void isci_port_change_state(struct isci_port *iport, enum isci_status sta
spin_unlock_irqrestore(&iport->state_lock, flags);
}
void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index)
/*
* This function will indicate which protocols are supported by this port.
* @sci_port: a handle corresponding to the SAS port for which to return the
* supported protocols.
* @protocols: This parameter specifies a pointer to a data structure
* which the core will copy the protocol values for the port from the
* transmit_identification register.
*/
static void
scic_sds_port_get_protocols(struct scic_sds_port *sci_port,
struct scic_phy_proto *protocols)
{
INIT_LIST_HEAD(&iport->remote_dev_list);
INIT_LIST_HEAD(&iport->domain_dev_list);
spin_lock_init(&iport->state_lock);
init_completion(&iport->start_complete);
iport->isci_host = ihost;
isci_port_change_state(iport, isci_freed);
u8 index;
protocols->all = 0;
for (index = 0; index < SCI_MAX_PHYS; index++) {
if (sci_port->phy_table[index] != NULL) {
scic_sds_phy_get_protocols(sci_port->phy_table[index],
protocols);
}
}
}
/**
* isci_port_get_state() - This function gets the status of the port object.
* @isci_port: This parameter points to the isci_port object
* This method requests a list (mask) of the phys contained in the supplied SAS
* port.
* @sci_port: a handle corresponding to the SAS port for which to return the
* phy mask.
*
* status of the object as a isci_status enum.
* Return a bit mask indicating which phys are a part of this port. Each bit
* corresponds to a phy identifier (e.g. bit 0 = phy id 0).
*/
enum isci_status isci_port_get_state(
struct isci_port *isci_port)
static u32 scic_sds_port_get_phys(struct scic_sds_port *sci_port)
{
return isci_port->status;
u32 index;
u32 mask;
mask = 0;
for (index = 0; index < SCI_MAX_PHYS; index++) {
if (sci_port->phy_table[index] != NULL) {
mask |= (1 << index);
}
}
return mask;
}
void isci_port_bc_change_received(struct isci_host *ihost,
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
/**
* scic_port_get_properties() - This method simply returns the properties
* regarding the port, such as: physical index, protocols, sas address, etc.
* @port: this parameter specifies the port for which to retrieve the physical
* index.
* @properties: This parameter specifies the properties structure into which to
* copy the requested information.
*
* Indicate if the user specified a valid port. SCI_SUCCESS This value is
* returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This
* value is returned if the specified port is not valid. When this value is
* returned, no data is copied to the properties output parameter.
*/
static enum sci_status scic_port_get_properties(struct scic_sds_port *port,
struct scic_port_properties *prop)
{
struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
if ((port == NULL) ||
(port->logical_port_index == SCIC_SDS_DUMMY_PORT))
return SCI_FAILURE_INVALID_PORT;
dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n",
__func__, iphy, &iphy->sas_phy);
prop->index = port->logical_port_index;
prop->phy_mask = scic_sds_port_get_phys(port);
scic_sds_port_get_sas_address(port, &prop->local.sas_address);
scic_sds_port_get_protocols(port, &prop->local.protocols);
scic_sds_port_get_attached_sas_address(port, &prop->remote.sas_address);
ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD);
scic_port_enable_broadcast_change_notification(sci_port);
return SCI_SUCCESS;
}
void isci_port_link_up(struct isci_host *isci_host,
static void isci_port_link_up(struct isci_host *isci_host,
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
......@@ -184,7 +229,8 @@ void isci_port_link_up(struct isci_host *isci_host,
* @port: This parameter specifies the isci port with the active link.
*
*/
void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy,
static void isci_port_link_down(struct isci_host *isci_host,
struct isci_phy *isci_phy,
struct isci_port *isci_port)
{
struct isci_remote_device *isci_device;
......@@ -230,30 +276,6 @@ void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy,
}
/**
* isci_port_deformed() - This function is called by libsas when a port becomes
* inactive.
* @phy: This parameter specifies the libsas phy with the inactive port.
*
*/
void isci_port_deformed(
struct asd_sas_phy *phy)
{
pr_debug("%s: sas_phy = %p\n", __func__, phy);
}
/**
* isci_port_formed() - This function is called by libsas when a port becomes
* active.
* @phy: This parameter specifies the libsas phy with the active port.
*
*/
void isci_port_formed(
struct asd_sas_phy *phy)
{
pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
}
/**
* isci_port_ready() - This function is called by the sci core when a link
* becomes ready.
......@@ -261,7 +283,7 @@ void isci_port_formed(
* @port: This parameter specifies the sci port with the active link.
*
*/
void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
static void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
{
dev_dbg(&isci_host->pdev->dev,
"%s: isci_port = %p\n", __func__, isci_port);
......@@ -279,12 +301,19 @@ void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
* @port: This parameter specifies the sci port with the active link.
*
*/
void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
static void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
{
dev_dbg(&isci_host->pdev->dev,
"%s: isci_port = %p\n", __func__, isci_port);
}
static void isci_port_stop_complete(struct scic_sds_controller *scic,
struct scic_sds_port *sci_port,
enum sci_status completion_status)
{
dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n");
}
/**
* isci_port_hard_reset_complete() - This function is called by the sci core
* when the hard reset complete notification has been received.
......@@ -293,7 +322,7 @@ void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_por
* process.
*
*/
void isci_port_hard_reset_complete(struct isci_port *isci_port,
static void isci_port_hard_reset_complete(struct isci_port *isci_port,
enum sci_status completion_status)
{
dev_dbg(&isci_port->isci_host->pdev->dev,
......@@ -306,62 +335,2364 @@ void isci_port_hard_reset_complete(struct isci_port *isci_port,
complete_all(&isci_port->hard_reset_complete);
}
int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
struct isci_phy *iphy)
/* This method will return a true value if the specified phy can be assigned to
* this port The following is a list of phys for each port that are allowed: -
* Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method
* doesn't preclude all configurations. It merely ensures that a phy is part
* of the allowable set of phy identifiers for that port. For example, one
* could assign phy 3 to port 0 and no other phys. Please refer to
* scic_sds_port_is_phy_mask_valid() for information regarding whether the
* phy_mask for a port can be supported. bool true if this is a valid phy
* assignment for the port false if this is not a valid phy assignment for the
* port
*/
bool scic_sds_port_is_valid_phy_assignment(struct scic_sds_port *sci_port,
u32 phy_index)
{
unsigned long flags;
enum sci_status status;
int ret = TMF_RESP_FUNC_COMPLETE;
/* Initialize to invalid value. */
u32 existing_phy_index = SCI_MAX_PHYS;
u32 index;
dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
__func__, iport);
if ((sci_port->physical_port_index == 1) && (phy_index != 1)) {
return false;
}
init_completion(&iport->hard_reset_complete);
if (sci_port->physical_port_index == 3 && phy_index != 3) {
return false;
}
spin_lock_irqsave(&ihost->scic_lock, flags);
if (
(sci_port->physical_port_index == 2)
&& ((phy_index == 0) || (phy_index == 1))
) {
return false;
}
#define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
status = scic_port_hard_reset(&iport->sci, ISCI_PORT_RESET_TIMEOUT);
for (index = 0; index < SCI_MAX_PHYS; index++) {
if ((sci_port->phy_table[index] != NULL)
&& (index != phy_index)) {
existing_phy_index = index;
}
}
spin_unlock_irqrestore(&ihost->scic_lock, flags);
/*
* Ensure that all of the phys in the port are capable of
* operating at the same maximum link rate. */
if (
(existing_phy_index < SCI_MAX_PHYS)
&& (sci_port->owning_controller->user_parameters.sds1.phys[
phy_index].max_speed_generation !=
sci_port->owning_controller->user_parameters.sds1.phys[
existing_phy_index].max_speed_generation)
)
return false;
if (status == SCI_SUCCESS) {
wait_for_completion(&iport->hard_reset_complete);
return true;
}
dev_dbg(&ihost->pdev->dev,
"%s: iport = %p; hard reset completion\n",
__func__, iport);
/**
*
* @sci_port: This is the port object for which to determine if the phy mask
* can be supported.
*
* This method will return a true value if the port's phy mask can be supported
* by the SCU. The following is a list of valid PHY mask configurations for
* each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2]
* - Port 3 - [3] This method returns a boolean indication specifying if the
* phy mask can be supported. true if this is a valid phy assignment for the
* port false if this is not a valid phy assignment for the port
*/
static bool scic_sds_port_is_phy_mask_valid(
struct scic_sds_port *sci_port,
u32 phy_mask)
{
if (sci_port->physical_port_index == 0) {
if (((phy_mask & 0x0F) == 0x0F)
|| ((phy_mask & 0x03) == 0x03)
|| ((phy_mask & 0x01) == 0x01)
|| (phy_mask == 0))
return true;
} else if (sci_port->physical_port_index == 1) {
if (((phy_mask & 0x02) == 0x02)
|| (phy_mask == 0))
return true;
} else if (sci_port->physical_port_index == 2) {
if (((phy_mask & 0x0C) == 0x0C)
|| ((phy_mask & 0x04) == 0x04)
|| (phy_mask == 0))
return true;
} else if (sci_port->physical_port_index == 3) {
if (((phy_mask & 0x08) == 0x08)
|| (phy_mask == 0))
return true;
}
if (iport->hard_reset_status != SCI_SUCCESS)
ret = TMF_RESP_FUNC_FAILED;
} else {
ret = TMF_RESP_FUNC_FAILED;
return false;
}
dev_err(&ihost->pdev->dev,
"%s: iport = %p; scic_port_hard_reset call"
" failed 0x%x\n",
__func__, iport, status);
/**
*
* @sci_port: This parameter specifies the port from which to return a
* connected phy.
*
* This method retrieves a currently active (i.e. connected) phy contained in
* the port. Currently, the lowest order phy that is connected is returned.
* This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is
* returned if there are no currently active (i.e. connected to a remote end
* point) phys contained in the port. All other values specify a struct scic_sds_phy
* object that is active in the port.
*/
static struct scic_sds_phy *scic_sds_port_get_a_connected_phy(
struct scic_sds_port *sci_port
) {
u32 index;
struct scic_sds_phy *phy;
for (index = 0; index < SCI_MAX_PHYS; index++) {
/*
* Ensure that the phy is both part of the port and currently
* connected to the remote end-point. */
phy = sci_port->phy_table[index];
if (
(phy != NULL)
&& scic_sds_port_active_phy(sci_port, phy)
) {
return phy;
}
}
/* If the hard reset for the port has failed, consider this
* the same as link failures on all phys in the port.
return NULL;
}
/**
* scic_sds_port_set_phy() -
* @out]: port The port object to which the phy assignement is being made.
* @out]: phy The phy which is being assigned to the port.
*
* This method attempts to make the assignment of the phy to the port. If
* successful the phy is assigned to the ports phy table. bool true if the phy
* assignment can be made. false if the phy assignement can not be made. This
* is a functional test that only fails if the phy is currently assigned to a
* different port.
*/
if (ret != TMF_RESP_FUNC_COMPLETE) {
dev_err(&ihost->pdev->dev,
"%s: iport = %p; hard reset failed "
"(0x%x) - sending link down to libsas for phy %p\n",
__func__, iport, iport->hard_reset_status, iphy);
static enum sci_status scic_sds_port_set_phy(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
/*
* Check to see if we can add this phy to a port
* that means that the phy is not part of a port and that the port does
* not already have a phy assinged to the phy index. */
if (
(port->phy_table[phy->phy_index] == NULL)
&& (scic_sds_phy_get_port(phy) == NULL)
&& scic_sds_port_is_valid_phy_assignment(port, phy->phy_index)
) {
/*
* Phy is being added in the stopped state so we are in MPC mode
* make logical port index = physical port index */
port->logical_port_index = port->physical_port_index;
port->phy_table[phy->phy_index] = phy;
scic_sds_phy_set_port(phy, port);
isci_port_link_down(ihost, iphy, iport);
return SCI_SUCCESS;
}
return ret;
return SCI_FAILURE;
}
/**
* scic_sds_port_clear_phy() -
* @out]: port The port from which the phy is being cleared.
* @out]: phy The phy being cleared from the port.
*
* This method will clear the phy assigned to this port. This method fails if
* this phy is not currently assinged to this port. bool true if the phy is
* removed from the port. false if this phy is not assined to this port.
*/
static enum sci_status scic_sds_port_clear_phy(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
/* Make sure that this phy is part of this port */
if (port->phy_table[phy->phy_index] == phy &&
scic_sds_phy_get_port(phy) == port) {
struct scic_sds_controller *scic = port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
/* Yep it is assigned to this port so remove it */
scic_sds_phy_set_port(phy, &ihost->ports[SCI_MAX_PORTS].sci);
port->phy_table[phy->phy_index] = NULL;
return SCI_SUCCESS;
}
return SCI_FAILURE;
}
void isci_port_stop_complete(struct scic_sds_controller *scic,
/**
* scic_sds_port_add_phy() -
* @sci_port: This parameter specifies the port in which the phy will be added.
* @sci_phy: This parameter is the phy which is to be added to the port.
*
* This method will add a PHY to the selected port. This method returns an
* enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other status
* is failre to add the phy to the port.
*/
enum sci_status scic_sds_port_add_phy(
struct scic_sds_port *sci_port,
enum sci_status completion_status)
struct scic_sds_phy *sci_phy)
{
dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n");
return sci_port->state_handlers->add_phy_handler(
sci_port, sci_phy);
}
/**
* scic_sds_port_remove_phy() -
* @sci_port: This parameter specifies the port in which the phy will be added.
* @sci_phy: This parameter is the phy which is to be added to the port.
*
* This method will remove the PHY from the selected PORT. This method returns
* an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any other
* status is failre to add the phy to the port.
*/
enum sci_status scic_sds_port_remove_phy(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
return sci_port->state_handlers->remove_phy_handler(
sci_port, sci_phy);
}
/**
* This method requests the SAS address for the supplied SAS port from the SCI
* implementation.
* @sci_port: a handle corresponding to the SAS port for which to return the
* SAS address.
* @sas_address: This parameter specifies a pointer to a SAS address structure
* into which the core will copy the SAS address for the port.
*
*/
void scic_sds_port_get_sas_address(
struct scic_sds_port *sci_port,
struct sci_sas_address *sas_address)
{
u32 index;
sas_address->high = 0;
sas_address->low = 0;
for (index = 0; index < SCI_MAX_PHYS; index++) {
if (sci_port->phy_table[index] != NULL) {
scic_sds_phy_get_sas_address(sci_port->phy_table[index], sas_address);
}
}
}
/*
* This function requests the SAS address for the device directly attached to
* this SAS port.
* @sci_port: a handle corresponding to the SAS port for which to return the
* SAS address.
* @sas_address: This parameter specifies a pointer to a SAS address structure
* into which the core will copy the SAS address for the device directly
* attached to the port.
*
*/
void scic_sds_port_get_attached_sas_address(
struct scic_sds_port *sci_port,
struct sci_sas_address *sas_address)
{
struct scic_sds_phy *sci_phy;
/*
* Ensure that the phy is both part of the port and currently
* connected to the remote end-point.
*/
sci_phy = scic_sds_port_get_a_connected_phy(sci_port);
if (sci_phy) {
if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) {
scic_sds_phy_get_attached_sas_address(sci_phy,
sas_address);
} else {
scic_sds_phy_get_sas_address(sci_phy, sas_address);
sas_address->low += sci_phy->phy_index;
}
} else {
sas_address->high = 0;
sas_address->low = 0;
}
}
/**
* scic_sds_port_construct_dummy_rnc() - create dummy rnc for si workaround
*
* @sci_port: logical port on which we need to create the remote node context
* @rni: remote node index for this remote node context.
*
* This routine will construct a dummy remote node context data structure
* This structure will be posted to the hardware to work around a scheduler
* error in the hardware.
*/
static void scic_sds_port_construct_dummy_rnc(struct scic_sds_port *sci_port, u16 rni)
{
union scu_remote_node_context *rnc;
rnc = &sci_port->owning_controller->remote_node_context_table[rni];
memset(rnc, 0, sizeof(union scu_remote_node_context));
rnc->ssp.remote_sas_address_hi = 0;
rnc->ssp.remote_sas_address_lo = 0;
rnc->ssp.remote_node_index = rni;
rnc->ssp.remote_node_port_width = 1;
rnc->ssp.logical_port_index = sci_port->physical_port_index;
rnc->ssp.nexus_loss_timer_enable = false;
rnc->ssp.check_bit = false;
rnc->ssp.is_valid = true;
rnc->ssp.is_remote_node_context = true;
rnc->ssp.function_number = 0;
rnc->ssp.arbitration_wait_time = 0;
}
/**
* scic_sds_port_construct_dummy_task() - create dummy task for si workaround
* @sci_port The logical port on which we need to create the
* remote node context.
* context.
* @tci The remote node index for this remote node context.
*
* This routine will construct a dummy task context data structure. This
* structure will be posted to the hardwre to work around a scheduler error
* in the hardware.
*
*/
static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u16 tci)
{
struct scu_task_context *task_context;
task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tci);
memset(task_context, 0, sizeof(struct scu_task_context));
task_context->abort = 0;
task_context->priority = 0;
task_context->initiator_request = 1;
task_context->connection_rate = 1;
task_context->protocol_engine_index = 0;
task_context->logical_port_index = sci_port->physical_port_index;
task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP;
task_context->task_index = scic_sds_io_tag_get_index(tci);
task_context->valid = SCU_TASK_CONTEXT_VALID;
task_context->context_type = SCU_TASK_CONTEXT_TYPE;
task_context->remote_node_index = sci_port->reserved_rni;
task_context->command_code = 0;
task_context->link_layer_control = 0;
task_context->do_not_dma_ssp_good_response = 1;
task_context->strict_ordering = 0;
task_context->control_frame = 0;
task_context->timeout_enable = 0;
task_context->block_guard_enable = 0;
task_context->address_modifier = 0;
task_context->task_phase = 0x01;
}
static void scic_sds_port_destroy_dummy_resources(struct scic_sds_port *sci_port)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
if (sci_port->reserved_tci != SCU_DUMMY_INDEX)
scic_controller_free_io_tag(scic, sci_port->reserved_tci);
if (sci_port->reserved_rni != SCU_DUMMY_INDEX)
scic_sds_remote_node_table_release_remote_node_index(&scic->available_remote_nodes,
1, sci_port->reserved_rni);
sci_port->reserved_rni = SCU_DUMMY_INDEX;
sci_port->reserved_tci = SCU_DUMMY_INDEX;
}
/**
* This method performs initialization of the supplied port. Initialization
* includes: - state machine initialization - member variable initialization
* - configuring the phy_mask
* @sci_port:
* @transport_layer_registers:
* @port_task_scheduler_registers:
* @port_configuration_regsiter:
*
* enum sci_status SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION This value is returned
* if the phy being added to the port
*/
enum sci_status scic_sds_port_initialize(
struct scic_sds_port *sci_port,
void __iomem *port_task_scheduler_registers,
void __iomem *port_configuration_regsiter,
void __iomem *viit_registers)
{
sci_port->port_task_scheduler_registers = port_task_scheduler_registers;
sci_port->port_pe_configuration_register = port_configuration_regsiter;
sci_port->viit_registers = viit_registers;
return SCI_SUCCESS;
}
/**
* scic_port_hard_reset() - perform port hard reset
* @port: a handle corresponding to the SAS port to be hard reset.
* @reset_timeout: This parameter specifies the number of milliseconds in which
* the port reset operation should complete.
*
* The SCI User callback in scic_user_callbacks_t will only be called once for
* each phy in the SAS Port at completion of the hard reset sequence. Return a
* status indicating whether the hard reset started successfully. SCI_SUCCESS
* This value is returned if the hard reset operation started successfully.
*/
static enum sci_status scic_port_hard_reset(struct scic_sds_port *port,
u32 reset_timeout)
{
return port->state_handlers->reset_handler(
port, reset_timeout);
}
/**
* This method assigns the direct attached device ID for this port.
*
* @param[in] sci_port The port for which the direct attached device id is to
* be assigned.
* @param[in] device_id The direct attached device ID to assign to the port.
* This will be the RNi for the device
*/
void scic_sds_port_setup_transports(
struct scic_sds_port *sci_port,
u32 device_id)
{
u8 index;
for (index = 0; index < SCI_MAX_PHYS; index++) {
if (sci_port->active_phy_mask & (1 << index))
scic_sds_phy_setup_transport(sci_port->phy_table[index], device_id);
}
}
/**
*
* @sci_port: This is the port on which the phy should be enabled.
* @sci_phy: This is the specific phy which to enable.
* @do_notify_user: This parameter specifies whether to inform the user (via
* scic_cb_port_link_up()) as to the fact that a new phy as become ready.
*
* This function will activate the phy in the port.
* Activation includes: - adding
* the phy to the port - enabling the Protocol Engine in the silicon. -
* notifying the user that the link is up. none
*/
static void scic_sds_port_activate_phy(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy,
bool do_notify_user)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA)
scic_sds_phy_resume(sci_phy);
sci_port->active_phy_mask |= 1 << sci_phy->phy_index;
scic_sds_controller_clear_invalid_phy(scic, sci_phy);
if (do_notify_user == true)
isci_port_link_up(ihost, sci_port, sci_phy);
}
void scic_sds_port_deactivate_phy(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy,
bool do_notify_user)
{
struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port);
struct isci_port *iport = sci_port_to_iport(sci_port);
struct isci_host *ihost = scic_to_ihost(scic);
struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
sci_port->active_phy_mask &= ~(1 << sci_phy->phy_index);
sci_phy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN;
/* Re-assign the phy back to the LP as if it were a narrow port */
writel(sci_phy->phy_index,
&sci_port->port_pe_configuration_register[sci_phy->phy_index]);
if (do_notify_user == true)
isci_port_link_down(ihost, iphy, iport);
}
/**
*
* @sci_port: This is the port on which the phy should be disabled.
* @sci_phy: This is the specific phy which to disabled.
*
* This function will disable the phy and report that the phy is not valid for
* this port object. None
*/
static void scic_sds_port_invalid_link_up(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
/*
* Check to see if we have alreay reported this link as bad and if
* not go ahead and tell the SCI_USER that we have discovered an
* invalid link.
*/
if ((scic->invalid_phy_mask & (1 << sci_phy->phy_index)) == 0) {
scic_sds_controller_set_invalid_phy(scic, sci_phy);
dev_warn(&scic_to_ihost(scic)->pdev->dev, "Invalid link up!\n");
}
}
/**
* scic_sds_port_general_link_up_handler - phy can be assigned to port?
* @sci_port: scic_sds_port object for which has a phy that has gone link up.
* @sci_phy: This is the struct scic_sds_phy object that has gone link up.
* @do_notify_user: This parameter specifies whether to inform the user (via
* scic_cb_port_link_up()) as to the fact that a new phy as become ready.
*
* Determine if this phy can be assigned to this
* port . If the phy is not a valid PHY for
* this port then the function will notify the user. A PHY can only be
* part of a port if it's attached SAS ADDRESS is the same as all other PHYs in
* the same port. none
*/
static void scic_sds_port_general_link_up_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy,
bool do_notify_user)
{
struct sci_sas_address port_sas_address;
struct sci_sas_address phy_sas_address;
scic_sds_port_get_attached_sas_address(sci_port, &port_sas_address);
scic_sds_phy_get_attached_sas_address(sci_phy, &phy_sas_address);
/* If the SAS address of the new phy matches the SAS address of
* other phys in the port OR this is the first phy in the port,
* then activate the phy and allow it to be used for operations
* in this port.
*/
if ((phy_sas_address.high == port_sas_address.high &&
phy_sas_address.low == port_sas_address.low) ||
sci_port->active_phy_mask == 0) {
struct sci_base_state_machine *sm = &sci_port->state_machine;
scic_sds_port_activate_phy(sci_port, sci_phy, do_notify_user);
if (sm->current_state_id == SCI_BASE_PORT_STATE_RESETTING)
sci_base_state_machine_change_state(sm, SCI_BASE_PORT_STATE_READY);
} else
scic_sds_port_invalid_link_up(sci_port, sci_phy);
}
/**
* This method returns false if the port only has a single phy object assigned.
* If there are no phys or more than one phy then the method will return
* true.
* @sci_port: The port for which the wide port condition is to be checked.
*
* bool true Is returned if this is a wide ported port. false Is returned if
* this is a narrow port.
*/
static bool scic_sds_port_is_wide(struct scic_sds_port *sci_port)
{
u32 index;
u32 phy_count = 0;
for (index = 0; index < SCI_MAX_PHYS; index++) {
if (sci_port->phy_table[index] != NULL) {
phy_count++;
}
}
return phy_count != 1;
}
/**
* This method is called by the PHY object when the link is detected. if the
* port wants the PHY to continue on to the link up state then the port
* layer must return true. If the port object returns false the phy object
* must halt its attempt to go link up.
* @sci_port: The port associated with the phy object.
* @sci_phy: The phy object that is trying to go link up.
*
* true if the phy object can continue to the link up condition. true Is
* returned if this phy can continue to the ready state. false Is returned if
* can not continue on to the ready state. This notification is in place for
* wide ports and direct attached phys. Since there are no wide ported SATA
* devices this could become an invalid port configuration.
*/
bool scic_sds_port_link_detected(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
if ((sci_port->logical_port_index != SCIC_SDS_DUMMY_PORT) &&
(sci_phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) &&
scic_sds_port_is_wide(sci_port)) {
scic_sds_port_invalid_link_up(sci_port, sci_phy);
return false;
}
return true;
}
/**
* This method is the entry point for the phy to inform the port that it is now
* in a ready state
* @sci_port:
*
*
*/
void scic_sds_port_link_up(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
sci_phy->is_in_link_training = false;
sci_port->state_handlers->link_up_handler(sci_port, sci_phy);
}
/**
* This method is the entry point for the phy to inform the port that it is no
* longer in a ready state
* @sci_port:
*
*
*/
void scic_sds_port_link_down(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
sci_port->state_handlers->link_down_handler(sci_port, sci_phy);
}
/**
* This method is called to start an IO request on this port.
* @sci_port:
* @sci_dev:
* @sci_req:
*
* enum sci_status
*/
enum sci_status scic_sds_port_start_io(
struct scic_sds_port *sci_port,
struct scic_sds_remote_device *sci_dev,
struct scic_sds_request *sci_req)
{
return sci_port->state_handlers->start_io_handler(
sci_port, sci_dev, sci_req);
}
/**
* This method is called to complete an IO request to the port.
* @sci_port:
* @sci_dev:
* @sci_req:
*
* enum sci_status
*/
enum sci_status scic_sds_port_complete_io(
struct scic_sds_port *sci_port,
struct scic_sds_remote_device *sci_dev,
struct scic_sds_request *sci_req)
{
return sci_port->state_handlers->complete_io_handler(
sci_port, sci_dev, sci_req);
}
/**
* This method is provided to timeout requests for port operations. Mostly its
* for the port reset operation.
*
*
*/
static void scic_sds_port_timeout_handler(void *port)
{
struct scic_sds_port *sci_port = port;
u32 current_state;
current_state = sci_base_state_machine_get_state(
&sci_port->state_machine);
if (current_state == SCI_BASE_PORT_STATE_RESETTING) {
/*
* if the port is still in the resetting state then the
* timeout fired before the reset completed.
*/
sci_base_state_machine_change_state(
&sci_port->state_machine,
SCI_BASE_PORT_STATE_FAILED);
} else if (current_state == SCI_BASE_PORT_STATE_STOPPED) {
/*
* if the port is stopped then the start request failed
* In this case stay in the stopped state.
*/
dev_err(sciport_to_dev(sci_port),
"%s: SCIC Port 0x%p failed to stop before tiemout.\n",
__func__,
sci_port);
} else if (current_state == SCI_BASE_PORT_STATE_STOPPING) {
/*
* if the port is still stopping then the stop has not
* completed
*/
isci_port_stop_complete(
scic_sds_port_get_controller(sci_port),
sci_port,
SCI_FAILURE_TIMEOUT);
} else {
/*
* The port is in the ready state and we have a timer
* reporting a timeout this should not happen.
*/
dev_err(sciport_to_dev(sci_port),
"%s: SCIC Port 0x%p is processing a timeout operation "
"in state %d.\n",
__func__,
sci_port,
current_state);
}
}
/* --------------------------------------------------------------------------- */
/**
* This function updates the hardwares VIIT entry for this port.
*
*
*/
static void scic_sds_port_update_viit_entry(struct scic_sds_port *sci_port)
{
struct sci_sas_address sas_address;
scic_sds_port_get_sas_address(sci_port, &sas_address);
writel(sas_address.high,
&sci_port->viit_registers->initiator_sas_address_hi);
writel(sas_address.low,
&sci_port->viit_registers->initiator_sas_address_lo);
/* This value get cleared just in case its not already cleared */
writel(0, &sci_port->viit_registers->reserved);
/* We are required to update the status register last */
writel(SCU_VIIT_ENTRY_ID_VIIT |
SCU_VIIT_IPPT_INITIATOR |
((1 << sci_port->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) |
SCU_VIIT_STATUS_ALL_VALID,
&sci_port->viit_registers->status);
}
/**
* This method returns the maximum allowed speed for data transfers on this
* port. This maximum allowed speed evaluates to the maximum speed of the
* slowest phy in the port.
* @sci_port: This parameter specifies the port for which to retrieve the
* maximum allowed speed.
*
* This method returns the maximum negotiated speed of the slowest phy in the
* port.
*/
enum sas_linkrate scic_sds_port_get_max_allowed_speed(
struct scic_sds_port *sci_port)
{
u16 index;
enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS;
struct scic_sds_phy *phy = NULL;
/*
* Loop through all of the phys in this port and find the phy with the
* lowest maximum link rate. */
for (index = 0; index < SCI_MAX_PHYS; index++) {
phy = sci_port->phy_table[index];
if (
(phy != NULL)
&& (scic_sds_port_active_phy(sci_port, phy) == true)
&& (phy->max_negotiated_speed < max_allowed_speed)
)
max_allowed_speed = phy->max_negotiated_speed;
}
return max_allowed_speed;
}
static void scic_port_enable_broadcast_change_notification(struct scic_sds_port *port)
{
struct scic_sds_phy *phy;
u32 register_value;
u8 index;
/* Loop through all of the phys to enable BCN. */
for (index = 0; index < SCI_MAX_PHYS; index++) {
phy = port->phy_table[index];
if (phy != NULL) {
register_value =
readl(&phy->link_layer_registers->link_layer_control);
/* clear the bit by writing 1. */
writel(register_value,
&phy->link_layer_registers->link_layer_control);
}
}
}
/*
* ****************************************************************************
* * READY SUBSTATE HANDLERS
* **************************************************************************** */
/*
* This method is the general ready state stop handler for the struct scic_sds_port
* object. This function will transition the ready substate machine to its
* final state. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_ready_substate_stop_handler(
struct scic_sds_port *port)
{
sci_base_state_machine_change_state(
&port->state_machine,
SCI_BASE_PORT_STATE_STOPPING
);
return SCI_SUCCESS;
}
/*
* This method is the general ready substate complete io handler for the
* struct scic_sds_port object. This function decrments the outstanding request count
* for this port object. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_ready_substate_complete_io_handler(
struct scic_sds_port *port,
struct scic_sds_remote_device *device,
struct scic_sds_request *io_request)
{
scic_sds_port_decrement_request_count(port);
return SCI_SUCCESS;
}
static enum sci_status scic_sds_port_ready_substate_add_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
enum sci_status status;
status = scic_sds_port_set_phy(port, phy);
if (status == SCI_SUCCESS) {
scic_sds_port_general_link_up_handler(port, phy, true);
port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
sci_base_state_machine_change_state(
&port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
);
}
return status;
}
static enum sci_status scic_sds_port_ready_substate_remove_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
enum sci_status status;
status = scic_sds_port_clear_phy(port, phy);
if (status == SCI_SUCCESS) {
scic_sds_port_deactivate_phy(port, phy, true);
port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
sci_base_state_machine_change_state(
&port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
);
}
return status;
}
/*
* ****************************************************************************
* * READY SUBSTATE WAITING HANDLERS
* **************************************************************************** */
/**
*
* @sci_port: This is the struct scic_sds_port object that which has a phy that has
* gone link up.
* @sci_phy: This is the struct scic_sds_phy object that has gone link up.
*
* This method is the ready waiting substate link up handler for the
* struct scic_sds_port object. This methos will report the link up condition for
* this port and will transition to the ready operational substate. none
*/
static void scic_sds_port_ready_waiting_substate_link_up_handler(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
/*
* Since this is the first phy going link up for the port we can just enable
* it and continue. */
scic_sds_port_activate_phy(sci_port, sci_phy, true);
sci_base_state_machine_change_state(
&sci_port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL
);
}
/*
* This method is the ready waiting substate start io handler for the
* struct scic_sds_port object. The port object can not accept new requests so the
* request is failed. enum sci_status SCI_FAILURE_INVALID_STATE
*/
static enum sci_status scic_sds_port_ready_waiting_substate_start_io_handler(
struct scic_sds_port *port,
struct scic_sds_remote_device *device,
struct scic_sds_request *io_request)
{
return SCI_FAILURE_INVALID_STATE;
}
/*
* ****************************************************************************
* * READY SUBSTATE OPERATIONAL HANDLERS
* **************************************************************************** */
/*
* This method will casue the port to reset. enum sci_status SCI_SUCCESS
*/
static enum
sci_status scic_sds_port_ready_operational_substate_reset_handler(
struct scic_sds_port *port,
u32 timeout)
{
enum sci_status status = SCI_FAILURE_INVALID_PHY;
u32 phy_index;
struct scic_sds_phy *selected_phy = NULL;
/* Select a phy on which we can send the hard reset request. */
for (phy_index = 0;
(phy_index < SCI_MAX_PHYS) && (selected_phy == NULL);
phy_index++) {
selected_phy = port->phy_table[phy_index];
if ((selected_phy != NULL) &&
!scic_sds_port_active_phy(port, selected_phy)) {
/*
* We found a phy but it is not ready select
* different phy
*/
selected_phy = NULL;
}
}
/* If we have a phy then go ahead and start the reset procedure */
if (selected_phy != NULL) {
status = scic_sds_phy_reset(selected_phy);
if (status == SCI_SUCCESS) {
isci_timer_start(port->timer_handle, timeout);
port->not_ready_reason =
SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED;
sci_base_state_machine_change_state(
&port->state_machine,
SCI_BASE_PORT_STATE_RESETTING);
}
}
return status;
}
/**
* scic_sds_port_ready_operational_substate_link_up_handler() -
* @sci_port: This is the struct scic_sds_port object that which has a phy that has
* gone link up.
* @sci_phy: This is the struct scic_sds_phy object that has gone link up.
*
* This method is the ready operational substate link up handler for the
* struct scic_sds_port object. This function notifies the SCI User that the phy has
* gone link up. none
*/
static void scic_sds_port_ready_operational_substate_link_up_handler(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
scic_sds_port_general_link_up_handler(sci_port, sci_phy, true);
}
/**
* scic_sds_port_ready_operational_substate_link_down_handler() -
* @sci_port: This is the struct scic_sds_port object that which has a phy that has
* gone link down.
* @sci_phy: This is the struct scic_sds_phy object that has gone link down.
*
* This method is the ready operational substate link down handler for the
* struct scic_sds_port object. This function notifies the SCI User that the phy has
* gone link down and if this is the last phy in the port the port will change
* state to the ready waiting substate. none
*/
static void scic_sds_port_ready_operational_substate_link_down_handler(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
scic_sds_port_deactivate_phy(sci_port, sci_phy, true);
/*
* If there are no active phys left in the port, then transition
* the port to the WAITING state until such time as a phy goes
* link up. */
if (sci_port->active_phy_mask == 0)
sci_base_state_machine_change_state(&sci_port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
}
/*
* This method is the ready operational substate start io handler for the
* struct scic_sds_port object. This function incremetns the outstanding request
* count for this port object. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_ready_operational_substate_start_io_handler(
struct scic_sds_port *port,
struct scic_sds_remote_device *device,
struct scic_sds_request *io_request)
{
port->started_request_count++;
return SCI_SUCCESS;
}
/*
* ****************************************************************************
* * READY SUBSTATE OPERATIONAL HANDLERS
* **************************************************************************** */
/*
* This is the default method for a port add phy request. It will report a
* warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE
*/
static enum sci_status scic_sds_port_ready_configuring_substate_add_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
enum sci_status status;
status = scic_sds_port_set_phy(port, phy);
if (status == SCI_SUCCESS) {
scic_sds_port_general_link_up_handler(port, phy, true);
/*
* Re-enter the configuring state since this may be the last phy in
* the port. */
sci_base_state_machine_change_state(
&port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
);
}
return status;
}
/*
* This is the default method for a port remove phy request. It will report a
* warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE
*/
static enum sci_status scic_sds_port_ready_configuring_substate_remove_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
enum sci_status status;
status = scic_sds_port_clear_phy(port, phy);
if (status == SCI_SUCCESS) {
scic_sds_port_deactivate_phy(port, phy, true);
/*
* Re-enter the configuring state since this may be the last phy in
* the port. */
sci_base_state_machine_change_state(
&port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING
);
}
return status;
}
/**
* scic_sds_port_ready_configuring_substate_complete_io_handler() -
* @port: This is the port that is being requested to complete the io request.
* @device: This is the device on which the io is completing.
*
* This method will decrement the outstanding request count for this port. If
* the request count goes to 0 then the port can be reprogrammed with its new
* phy data.
*/
static enum sci_status
scic_sds_port_ready_configuring_substate_complete_io_handler(
struct scic_sds_port *port,
struct scic_sds_remote_device *device,
struct scic_sds_request *io_request)
{
scic_sds_port_decrement_request_count(port);
if (port->started_request_count == 0) {
sci_base_state_machine_change_state(
&port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL
);
}
return SCI_SUCCESS;
}
static enum sci_status default_port_handler(struct scic_sds_port *sci_port,
const char *func)
{
dev_warn(sciport_to_dev(sci_port),
"%s: in wrong state: %d\n", func,
sci_base_state_machine_get_state(&sci_port->state_machine));
return SCI_FAILURE_INVALID_STATE;
}
static enum sci_status
scic_sds_port_default_start_handler(struct scic_sds_port *sci_port)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status
scic_sds_port_default_stop_handler(struct scic_sds_port *sci_port)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status
scic_sds_port_default_destruct_handler(struct scic_sds_port *sci_port)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status
scic_sds_port_default_reset_handler(struct scic_sds_port *sci_port,
u32 timeout)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status
scic_sds_port_default_add_phy_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *base_phy)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status
scic_sds_port_default_remove_phy_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *base_phy)
{
return default_port_handler(sci_port, __func__);
}
/*
* This is the default method for a port unsolicited frame request. It will
* report a warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE Is it even
* possible to receive an unsolicited frame directed to a port object? It
* seems possible if we implementing virtual functions but until then?
*/
static enum sci_status
scic_sds_port_default_frame_handler(struct scic_sds_port *sci_port,
u32 frame_index)
{
struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port);
default_port_handler(sci_port, __func__);
scic_sds_controller_release_frame(scic, frame_index);
return SCI_FAILURE_INVALID_STATE;
}
static enum sci_status scic_sds_port_default_event_handler(struct scic_sds_port *sci_port,
u32 event_code)
{
return default_port_handler(sci_port, __func__);
}
static void scic_sds_port_default_link_up_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
default_port_handler(sci_port, __func__);
}
static void scic_sds_port_default_link_down_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
default_port_handler(sci_port, __func__);
}
static enum sci_status scic_sds_port_default_start_io_handler(struct scic_sds_port *sci_port,
struct scic_sds_remote_device *sci_dev,
struct scic_sds_request *sci_req)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status scic_sds_port_default_complete_io_handler(struct scic_sds_port *sci_port,
struct scic_sds_remote_device *sci_dev,
struct scic_sds_request *sci_req)
{
return default_port_handler(sci_port, __func__);
}
static struct scic_sds_port_state_handler
scic_sds_port_ready_substate_handler_table[SCIC_SDS_PORT_READY_MAX_SUBSTATES] = {
{
/* SCIC_SDS_PORT_READY_SUBSTATE_WAITING */
scic_sds_port_default_start_handler,
scic_sds_port_ready_substate_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_ready_substate_add_phy_handler,
scic_sds_port_default_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_ready_waiting_substate_link_up_handler,
scic_sds_port_default_link_down_handler,
scic_sds_port_ready_waiting_substate_start_io_handler,
scic_sds_port_ready_substate_complete_io_handler,
},
{
/* SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL */
scic_sds_port_default_start_handler,
scic_sds_port_ready_substate_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_ready_operational_substate_reset_handler,
scic_sds_port_ready_substate_add_phy_handler,
scic_sds_port_ready_substate_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_ready_operational_substate_link_up_handler,
scic_sds_port_ready_operational_substate_link_down_handler,
scic_sds_port_ready_operational_substate_start_io_handler,
scic_sds_port_ready_substate_complete_io_handler,
},
{
/* SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING */
scic_sds_port_default_start_handler,
scic_sds_port_ready_substate_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_ready_configuring_substate_add_phy_handler,
scic_sds_port_ready_configuring_substate_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_default_link_up_handler,
scic_sds_port_default_link_down_handler,
scic_sds_port_default_start_io_handler,
scic_sds_port_ready_configuring_substate_complete_io_handler
}
};
/**
* scic_sds_port_set_ready_state_handlers() -
*
* This macro sets the port ready substate handlers.
*/
#define scic_sds_port_set_ready_state_handlers(port, state_id) \
scic_sds_port_set_state_handlers(\
port, &scic_sds_port_ready_substate_handler_table[(state_id)] \
)
/*
* ******************************************************************************
* * PORT STATE PRIVATE METHODS
* ****************************************************************************** */
/**
*
* @sci_port: This is the struct scic_sds_port object to suspend.
*
* This method will susped the port task scheduler for this port object. none
*/
static void
scic_sds_port_suspend_port_task_scheduler(struct scic_sds_port *port)
{
u32 pts_control_value;
pts_control_value = readl(&port->port_task_scheduler_registers->control);
pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND);
writel(pts_control_value, &port->port_task_scheduler_registers->control);
}
/**
* scic_sds_port_post_dummy_request() - post dummy/workaround request
* @sci_port: port to post task
*
* Prevent the hardware scheduler from posting new requests to the front
* of the scheduler queue causing a starvation problem for currently
* ongoing requests.
*
*/
static void scic_sds_port_post_dummy_request(struct scic_sds_port *sci_port)
{
u32 command;
struct scu_task_context *task_context;
struct scic_sds_controller *scic = sci_port->owning_controller;
u16 tci = sci_port->reserved_tci;
task_context = scic_sds_controller_get_task_context_buffer(scic, tci);
task_context->abort = 0;
command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
tci;
scic_sds_controller_post_request(scic, command);
}
/**
* This routine will abort the dummy request. This will alow the hardware to
* power down parts of the silicon to save power.
*
* @sci_port: The port on which the task must be aborted.
*
*/
static void scic_sds_port_abort_dummy_request(struct scic_sds_port *sci_port)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
u16 tci = sci_port->reserved_tci;
struct scu_task_context *tc;
u32 command;
tc = scic_sds_controller_get_task_context_buffer(scic, tci);
tc->abort = 1;
command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT |
sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT |
tci;
scic_sds_controller_post_request(scic, command);
}
/**
*
* @sci_port: This is the struct scic_sds_port object to resume.
*
* This method will resume the port task scheduler for this port object. none
*/
static void
scic_sds_port_resume_port_task_scheduler(struct scic_sds_port *port)
{
u32 pts_control_value;
pts_control_value = readl(&port->port_task_scheduler_registers->control);
pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND);
writel(pts_control_value, &port->port_task_scheduler_registers->control);
}
/*
* ******************************************************************************
* * PORT READY SUBSTATE METHODS
* ****************************************************************************** */
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* entering the SCIC_SDS_PORT_READY_SUBSTATE_WAITING. This function checks the
* port for any ready phys. If there is at least one phy in a ready state then
* the port transitions to the ready operational substate. none
*/
static void scic_sds_port_ready_substate_waiting_enter(void *object)
{
struct scic_sds_port *sci_port = object;
scic_sds_port_set_ready_state_handlers(
sci_port, SCIC_SDS_PORT_READY_SUBSTATE_WAITING
);
scic_sds_port_suspend_port_task_scheduler(sci_port);
sci_port->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS;
if (sci_port->active_phy_mask != 0) {
/* At least one of the phys on the port is ready */
sci_base_state_machine_change_state(
&sci_port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL
);
}
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This function will perform the actions required by the struct scic_sds_port
* on entering the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function sets
* the state handlers for the port object, notifies the SCI User that the port
* is ready, and resumes port operations. none
*/
static void scic_sds_port_ready_substate_operational_enter(void *object)
{
u32 index;
struct scic_sds_port *sci_port = object;
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
struct isci_port *iport = sci_port_to_iport(sci_port);
scic_sds_port_set_ready_state_handlers(
sci_port,
SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
isci_port_ready(ihost, iport);
for (index = 0; index < SCI_MAX_PHYS; index++) {
if (sci_port->phy_table[index]) {
writel(sci_port->physical_port_index,
&sci_port->port_pe_configuration_register[
sci_port->phy_table[index]->phy_index]);
}
}
scic_sds_port_update_viit_entry(sci_port);
scic_sds_port_resume_port_task_scheduler(sci_port);
/*
* Post the dummy task for the port so the hardware can schedule
* io correctly
*/
scic_sds_port_post_dummy_request(sci_port);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports
* the port not ready and suspends the port task scheduler. none
*/
static void scic_sds_port_ready_substate_operational_exit(void *object)
{
struct scic_sds_port *sci_port = object;
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
struct isci_port *iport = sci_port_to_iport(sci_port);
/*
* Kill the dummy task for this port if it has not yet posted
* the hardware will treat this as a NOP and just return abort
* complete.
*/
scic_sds_port_abort_dummy_request(sci_port);
isci_port_not_ready(ihost, iport);
}
/*
* ******************************************************************************
* * PORT READY CONFIGURING METHODS
* ****************************************************************************** */
/**
* scic_sds_port_ready_substate_configuring_enter() -
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports
* the port not ready and suspends the port task scheduler. none
*/
static void scic_sds_port_ready_substate_configuring_enter(void *object)
{
struct scic_sds_port *sci_port = object;
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
struct isci_port *iport = sci_port_to_iport(sci_port);
scic_sds_port_set_ready_state_handlers(
sci_port,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
if (sci_port->active_phy_mask == 0) {
isci_port_not_ready(ihost, iport);
sci_base_state_machine_change_state(
&sci_port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
} else if (sci_port->started_request_count == 0)
sci_base_state_machine_change_state(
&sci_port->ready_substate_machine,
SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL);
}
static void scic_sds_port_ready_substate_configuring_exit(void *object)
{
struct scic_sds_port *sci_port = object;
scic_sds_port_suspend_port_task_scheduler(sci_port);
}
/* --------------------------------------------------------------------------- */
static const struct sci_base_state scic_sds_port_ready_substate_table[] = {
[SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = {
.enter_state = scic_sds_port_ready_substate_waiting_enter,
},
[SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = {
.enter_state = scic_sds_port_ready_substate_operational_enter,
.exit_state = scic_sds_port_ready_substate_operational_exit
},
[SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = {
.enter_state = scic_sds_port_ready_substate_configuring_enter,
.exit_state = scic_sds_port_ready_substate_configuring_exit
},
};
/**
*
* @port: This is the struct scic_sds_port object on which the io request count will
* be decremented.
* @device: This is the struct scic_sds_remote_device object to which the io request
* is being directed. This parameter is not required to complete this
* operation.
* @io_request: This is the request that is being completed on this port
* object. This parameter is not required to complete this operation.
*
* This is a general complete io request handler for the struct scic_sds_port object.
* enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_general_complete_io_handler(
struct scic_sds_port *port,
struct scic_sds_remote_device *device,
struct scic_sds_request *io_request)
{
scic_sds_port_decrement_request_count(port);
return SCI_SUCCESS;
}
/**
* scic_sds_port_stopped_state_start_handler() - stop a port from "started"
*
* @port: This is the struct scic_sds_port object which is cast into a
* struct scic_sds_port object.
*
* This function takes the struct scic_sds_port from a stopped state and
* attempts to start it. To start a port it must have no assiged devices and
* it must have at least one phy assigned to it. If those conditions are
* met then the port can transition to the ready state.
* enum sci_status
* SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION
* This struct scic_sds_port object could not be started because the port
* configuration is not valid.
* SCI_SUCCESS
* the start request is successful and the struct scic_sds_port object
* has transitioned to the SCI_BASE_PORT_STATE_READY.
*/
static enum sci_status
scic_sds_port_stopped_state_start_handler(struct scic_sds_port *sci_port)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
enum sci_status status = SCI_SUCCESS;
u32 phy_mask;
if (sci_port->assigned_device_count > 0) {
/*
* @todo This is a start failure operation because
* there are still devices assigned to this port.
* There must be no devices assigned to a port on a
* start operation.
*/
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
sci_port->timer_handle =
isci_timer_create(ihost,
sci_port,
scic_sds_port_timeout_handler);
if (!sci_port->timer_handle)
return SCI_FAILURE_INSUFFICIENT_RESOURCES;
if (sci_port->reserved_rni == SCU_DUMMY_INDEX) {
u16 rni = scic_sds_remote_node_table_allocate_remote_node(
&scic->available_remote_nodes, 1);
if (rni != SCU_DUMMY_INDEX)
scic_sds_port_construct_dummy_rnc(sci_port, rni);
else
status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
sci_port->reserved_rni = rni;
}
if (sci_port->reserved_tci == SCU_DUMMY_INDEX) {
/* Allocate a TCI and remove the sequence nibble */
u16 tci = scic_controller_allocate_io_tag(scic);
if (tci != SCU_DUMMY_INDEX)
scic_sds_port_construct_dummy_task(sci_port, tci);
else
status = SCI_FAILURE_INSUFFICIENT_RESOURCES;
sci_port->reserved_tci = tci;
}
if (status == SCI_SUCCESS) {
phy_mask = scic_sds_port_get_phys(sci_port);
/*
* There are one or more phys assigned to this port. Make sure
* the port's phy mask is in fact legal and supported by the
* silicon.
*/
if (scic_sds_port_is_phy_mask_valid(sci_port, phy_mask) == true) {
sci_base_state_machine_change_state(
&sci_port->state_machine,
SCI_BASE_PORT_STATE_READY);
return SCI_SUCCESS;
} else
status = SCI_FAILURE;
}
if (status != SCI_SUCCESS)
scic_sds_port_destroy_dummy_resources(sci_port);
return status;
}
/*
* This method takes the struct scic_sds_port that is in a stopped state and handles a
* stop request. This function takes no action. enum sci_status SCI_SUCCESS the
* stop request is successful as the struct scic_sds_port object is already stopped.
*/
static enum sci_status scic_sds_port_stopped_state_stop_handler(
struct scic_sds_port *port)
{
/* We are already stopped so there is nothing to do here */
return SCI_SUCCESS;
}
/*
* This method takes the struct scic_sds_port that is in a stopped state and handles
* the destruct request. The stopped state is the only state in which the
* struct scic_sds_port can be destroyed. This function causes the port object to
* transition to the SCI_BASE_PORT_STATE_FINAL. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_stopped_state_destruct_handler(
struct scic_sds_port *port)
{
sci_base_state_machine_stop(&port->state_machine);
return SCI_SUCCESS;
}
/*
* This method takes the struct scic_sds_port that is in a stopped state and handles
* the add phy request. In MPC mode the only time a phy can be added to a port
* is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status
* SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not
* be added to the port. SCI_SUCCESS if the phy is added to the port.
*/
static enum sci_status scic_sds_port_stopped_state_add_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
struct sci_sas_address port_sas_address;
/* Read the port assigned SAS Address if there is one */
scic_sds_port_get_sas_address(port, &port_sas_address);
if (port_sas_address.high != 0 && port_sas_address.low != 0) {
struct sci_sas_address phy_sas_address;
/*
* Make sure that the PHY SAS Address matches the SAS Address
* for this port. */
scic_sds_phy_get_sas_address(phy, &phy_sas_address);
if (
(port_sas_address.high != phy_sas_address.high)
|| (port_sas_address.low != phy_sas_address.low)
) {
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
}
return scic_sds_port_set_phy(port, phy);
}
/*
* This method takes the struct scic_sds_port that is in a stopped state and handles
* the remove phy request. In MPC mode the only time a phy can be removed from
* a port is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status
* SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not
* be added to the port. SCI_SUCCESS if the phy is added to the port.
*/
static enum sci_status scic_sds_port_stopped_state_remove_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
return scic_sds_port_clear_phy(port, phy);
}
/*
* ****************************************************************************
* * READY STATE HANDLERS
* **************************************************************************** */
/*
* ****************************************************************************
* * RESETTING STATE HANDLERS
* **************************************************************************** */
/*
* ****************************************************************************
* * STOPPING STATE HANDLERS
* **************************************************************************** */
/*
* This method takes the struct scic_sds_port that is in a stopping state and handles
* the complete io request. Should the request count reach 0 then the port
* object will transition to the stopped state. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_stopping_state_complete_io_handler(
struct scic_sds_port *sci_port,
struct scic_sds_remote_device *device,
struct scic_sds_request *io_request)
{
scic_sds_port_decrement_request_count(sci_port);
if (sci_port->started_request_count == 0) {
sci_base_state_machine_change_state(&sci_port->state_machine,
SCI_BASE_PORT_STATE_STOPPED);
}
return SCI_SUCCESS;
}
/*
* ****************************************************************************
* * RESETTING STATE HANDLERS
* **************************************************************************** */
/**
*
* @port: This is the port object which is being requested to stop.
*
* This method will stop a failed port. This causes a transition to the
* stopping state. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_port_reset_state_stop_handler(
struct scic_sds_port *port)
{
sci_base_state_machine_change_state(
&port->state_machine,
SCI_BASE_PORT_STATE_STOPPING
);
return SCI_SUCCESS;
}
/*
* This method will transition a failed port to its ready state. The port
* failed because a hard reset request timed out but at some time later one or
* more phys in the port became ready. enum sci_status SCI_SUCCESS
*/
static void scic_sds_port_reset_state_link_up_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
/*
* / @todo We should make sure that the phy that has gone link up is the same
* / one on which we sent the reset. It is possible that the phy on
* / which we sent the reset is not the one that has gone link up and we
* / want to make sure that phy being reset comes back. Consider the
* / case where a reset is sent but before the hardware processes the
* / reset it get a link up on the port because of a hot plug event.
* / because of the reset request this phy will go link down almost
* / immediately. */
/*
* In the resetting state we don't notify the user regarding
* link up and link down notifications. */
scic_sds_port_general_link_up_handler(port, phy, false);
}
/*
* This method process link down notifications that occur during a port reset
* operation. Link downs can occur during the reset operation. enum sci_status
* SCI_SUCCESS
*/
static void scic_sds_port_reset_state_link_down_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
/*
* In the resetting state we don't notify the user regarding
* link up and link down notifications. */
scic_sds_port_deactivate_phy(port, phy, false);
}
static struct scic_sds_port_state_handler
scic_sds_port_state_handler_table[SCI_BASE_PORT_MAX_STATES] =
{
/* SCI_BASE_PORT_STATE_STOPPED */
{
scic_sds_port_stopped_state_start_handler,
scic_sds_port_stopped_state_stop_handler,
scic_sds_port_stopped_state_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_stopped_state_add_phy_handler,
scic_sds_port_stopped_state_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_default_link_up_handler,
scic_sds_port_default_link_down_handler,
scic_sds_port_default_start_io_handler,
scic_sds_port_default_complete_io_handler
},
/* SCI_BASE_PORT_STATE_STOPPING */
{
scic_sds_port_default_start_handler,
scic_sds_port_default_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_default_add_phy_handler,
scic_sds_port_default_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_default_link_up_handler,
scic_sds_port_default_link_down_handler,
scic_sds_port_default_start_io_handler,
scic_sds_port_stopping_state_complete_io_handler
},
/* SCI_BASE_PORT_STATE_READY */
{
scic_sds_port_default_start_handler,
scic_sds_port_default_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_default_add_phy_handler,
scic_sds_port_default_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_default_link_up_handler,
scic_sds_port_default_link_down_handler,
scic_sds_port_default_start_io_handler,
scic_sds_port_general_complete_io_handler
},
/* SCI_BASE_PORT_STATE_RESETTING */
{
scic_sds_port_default_start_handler,
scic_sds_port_reset_state_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_default_add_phy_handler,
scic_sds_port_default_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_reset_state_link_up_handler,
scic_sds_port_reset_state_link_down_handler,
scic_sds_port_default_start_io_handler,
scic_sds_port_general_complete_io_handler
},
/* SCI_BASE_PORT_STATE_FAILED */
{
scic_sds_port_default_start_handler,
scic_sds_port_default_stop_handler,
scic_sds_port_default_destruct_handler,
scic_sds_port_default_reset_handler,
scic_sds_port_default_add_phy_handler,
scic_sds_port_default_remove_phy_handler,
scic_sds_port_default_frame_handler,
scic_sds_port_default_event_handler,
scic_sds_port_default_link_up_handler,
scic_sds_port_default_link_down_handler,
scic_sds_port_default_start_io_handler,
scic_sds_port_general_complete_io_handler
}
};
/*
* ******************************************************************************
* * PORT STATE PRIVATE METHODS
* ****************************************************************************** */
/**
*
* @sci_port: This is the port object which to suspend.
*
* This method will enable the SCU Port Task Scheduler for this port object but
* will leave the port task scheduler in a suspended state. none
*/
static void
scic_sds_port_enable_port_task_scheduler(struct scic_sds_port *port)
{
u32 pts_control_value;
pts_control_value = readl(&port->port_task_scheduler_registers->control);
pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND);
writel(pts_control_value, &port->port_task_scheduler_registers->control);
}
/**
*
* @sci_port: This is the port object which to resume.
*
* This method will disable the SCU port task scheduler for this port object.
* none
*/
static void
scic_sds_port_disable_port_task_scheduler(struct scic_sds_port *port)
{
u32 pts_control_value;
pts_control_value = readl(&port->port_task_scheduler_registers->control);
pts_control_value &=
~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND));
writel(pts_control_value, &port->port_task_scheduler_registers->control);
}
static void scic_sds_port_post_dummy_remote_node(struct scic_sds_port *sci_port)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
u8 phys_index = sci_port->physical_port_index;
union scu_remote_node_context *rnc;
u16 rni = sci_port->reserved_rni;
u32 command;
rnc = &scic->remote_node_context_table[rni];
rnc->ssp.is_valid = true;
command = SCU_CONTEXT_COMMAND_POST_RNC_32 |
phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
scic_sds_controller_post_request(scic, command);
/* ensure hardware has seen the post rnc command and give it
* ample time to act before sending the suspend
*/
readl(&scic->smu_registers->interrupt_status); /* flush */
udelay(10);
command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX |
phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
scic_sds_controller_post_request(scic, command);
}
static void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port *sci_port)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
u8 phys_index = sci_port->physical_port_index;
union scu_remote_node_context *rnc;
u16 rni = sci_port->reserved_rni;
u32 command;
rnc = &scic->remote_node_context_table[rni];
rnc->ssp.is_valid = false;
/* ensure the preceding tc abort request has reached the
* controller and give it ample time to act before posting the rnc
* invalidate
*/
readl(&scic->smu_registers->interrupt_status); /* flush */
udelay(10);
command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE |
phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni;
scic_sds_controller_post_request(scic, command);
}
/*
* ******************************************************************************
* * PORT STATE METHODS
* ****************************************************************************** */
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* entering the SCI_BASE_PORT_STATE_STOPPED. This function sets the stopped
* state handlers for the struct scic_sds_port object and disables the port task
* scheduler in the hardware. none
*/
static void scic_sds_port_stopped_state_enter(void *object)
{
struct scic_sds_port *sci_port = object;
scic_sds_port_set_base_state_handlers(
sci_port, SCI_BASE_PORT_STATE_STOPPED
);
if (
SCI_BASE_PORT_STATE_STOPPING
== sci_port->state_machine.previous_state_id
) {
/*
* If we enter this state becasuse of a request to stop
* the port then we want to disable the hardwares port
* task scheduler. */
scic_sds_port_disable_port_task_scheduler(sci_port);
}
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* exiting the SCI_BASE_STATE_STOPPED. This function enables the SCU hardware
* port task scheduler. none
*/
static void scic_sds_port_stopped_state_exit(void *object)
{
struct scic_sds_port *sci_port = object;
/* Enable and suspend the port task scheduler */
scic_sds_port_enable_port_task_scheduler(sci_port);
}
/**
* scic_sds_port_ready_state_enter -
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* entering the SCI_BASE_PORT_STATE_READY. This function sets the ready state
* handlers for the struct scic_sds_port object, reports the port object as
* not ready and starts the ready substate machine. none
*/
static void scic_sds_port_ready_state_enter(void *object)
{
struct scic_sds_port *sci_port = object;
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
struct isci_port *iport = sci_port_to_iport(sci_port);
u32 prev_state;
/* Put the ready state handlers in place though they will not be there long */
scic_sds_port_set_base_state_handlers(sci_port, SCI_BASE_PORT_STATE_READY);
prev_state = sci_port->state_machine.previous_state_id;
if (prev_state == SCI_BASE_PORT_STATE_RESETTING)
isci_port_hard_reset_complete(iport, SCI_SUCCESS);
else
isci_port_not_ready(ihost, iport);
/* Post and suspend the dummy remote node context for this port. */
scic_sds_port_post_dummy_remote_node(sci_port);
/* Start the ready substate machine */
sci_base_state_machine_start(&sci_port->ready_substate_machine);
}
static void scic_sds_port_ready_state_exit(void *object)
{
struct scic_sds_port *sci_port = object;
sci_base_state_machine_stop(&sci_port->ready_substate_machine);
scic_sds_port_invalidate_dummy_remote_node(sci_port);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* entering the SCI_BASE_PORT_STATE_RESETTING. This function sets the resetting
* state handlers for the struct scic_sds_port object. none
*/
static void scic_sds_port_resetting_state_enter(void *object)
{
struct scic_sds_port *sci_port = object;
scic_sds_port_set_base_state_handlers(
sci_port, SCI_BASE_PORT_STATE_RESETTING
);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This function will perform the actions required by the
* struct scic_sds_port on
* exiting the SCI_BASE_STATE_RESETTING. This function does nothing. none
*/
static inline void scic_sds_port_resetting_state_exit(void *object)
{
struct scic_sds_port *sci_port = object;
isci_timer_stop(sci_port->timer_handle);
}
/**
*
* @object: This is the void object which is cast to a
* struct scic_sds_port object.
*
* This method will perform the actions required by the struct scic_sds_port on
* entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping
* state handlers for the struct scic_sds_port object. none
*/
static void scic_sds_port_stopping_state_enter(void *object)
{
struct scic_sds_port *sci_port = object;
scic_sds_port_set_base_state_handlers(
sci_port, SCI_BASE_PORT_STATE_STOPPING
);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This function will perform the actions required by the
* struct scic_sds_port on
* exiting the SCI_BASE_STATE_STOPPING. This function does nothing. none
*/
static inline void
scic_sds_port_stopping_state_exit(void *object)
{
struct scic_sds_port *sci_port = object;
isci_timer_stop(sci_port->timer_handle);
scic_sds_port_destroy_dummy_resources(sci_port);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_port object.
*
* This function will perform the actions required by the
* struct scic_sds_port on
* entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping
* state handlers for the struct scic_sds_port object. none
*/
static void scic_sds_port_failed_state_enter(void *object)
{
struct scic_sds_port *sci_port = object;
struct isci_port *iport = sci_port_to_iport(sci_port);
scic_sds_port_set_base_state_handlers(sci_port,
SCI_BASE_PORT_STATE_FAILED);
isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT);
}
/* --------------------------------------------------------------------------- */
static const struct sci_base_state scic_sds_port_state_table[] = {
[SCI_BASE_PORT_STATE_STOPPED] = {
.enter_state = scic_sds_port_stopped_state_enter,
.exit_state = scic_sds_port_stopped_state_exit
},
[SCI_BASE_PORT_STATE_STOPPING] = {
.enter_state = scic_sds_port_stopping_state_enter,
.exit_state = scic_sds_port_stopping_state_exit
},
[SCI_BASE_PORT_STATE_READY] = {
.enter_state = scic_sds_port_ready_state_enter,
.exit_state = scic_sds_port_ready_state_exit
},
[SCI_BASE_PORT_STATE_RESETTING] = {
.enter_state = scic_sds_port_resetting_state_enter,
.exit_state = scic_sds_port_resetting_state_exit
},
[SCI_BASE_PORT_STATE_FAILED] = {
.enter_state = scic_sds_port_failed_state_enter,
}
};
void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 index,
struct scic_sds_controller *scic)
{
sci_base_state_machine_construct(&sci_port->state_machine,
sci_port,
scic_sds_port_state_table,
SCI_BASE_PORT_STATE_STOPPED);
sci_base_state_machine_start(&sci_port->state_machine);
sci_base_state_machine_construct(&sci_port->ready_substate_machine,
sci_port,
scic_sds_port_ready_substate_table,
SCIC_SDS_PORT_READY_SUBSTATE_WAITING);
sci_port->logical_port_index = SCIC_SDS_DUMMY_PORT;
sci_port->physical_port_index = index;
sci_port->active_phy_mask = 0;
sci_port->owning_controller = scic;
sci_port->started_request_count = 0;
sci_port->assigned_device_count = 0;
sci_port->reserved_rni = SCU_DUMMY_INDEX;
sci_port->reserved_tci = SCU_DUMMY_INDEX;
sci_port->timer_handle = NULL;
sci_port->port_task_scheduler_registers = NULL;
for (index = 0; index < SCI_MAX_PHYS; index++)
sci_port->phy_table[index] = NULL;
}
void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index)
{
INIT_LIST_HEAD(&iport->remote_dev_list);
INIT_LIST_HEAD(&iport->domain_dev_list);
spin_lock_init(&iport->state_lock);
init_completion(&iport->start_complete);
iport->isci_host = ihost;
isci_port_change_state(iport, isci_freed);
}
/**
* isci_port_get_state() - This function gets the status of the port object.
* @isci_port: This parameter points to the isci_port object
*
* status of the object as a isci_status enum.
*/
enum isci_status isci_port_get_state(
struct isci_port *isci_port)
{
return isci_port->status;
}
static void isci_port_bc_change_received(struct isci_host *ihost,
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n",
__func__, iphy, &iphy->sas_phy);
ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD);
scic_port_enable_broadcast_change_notification(sci_port);
}
void scic_sds_port_broadcast_change_received(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
struct scic_sds_controller *scic = sci_port->owning_controller;
struct isci_host *ihost = scic_to_ihost(scic);
/* notify the user. */
isci_port_bc_change_received(ihost, sci_port, sci_phy);
}
int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
struct isci_phy *iphy)
{
unsigned long flags;
enum sci_status status;
int ret = TMF_RESP_FUNC_COMPLETE;
dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
__func__, iport);
init_completion(&iport->hard_reset_complete);
spin_lock_irqsave(&ihost->scic_lock, flags);
#define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
status = scic_port_hard_reset(&iport->sci, ISCI_PORT_RESET_TIMEOUT);
spin_unlock_irqrestore(&ihost->scic_lock, flags);
if (status == SCI_SUCCESS) {
wait_for_completion(&iport->hard_reset_complete);
dev_dbg(&ihost->pdev->dev,
"%s: iport = %p; hard reset completion\n",
__func__, iport);
if (iport->hard_reset_status != SCI_SUCCESS)
ret = TMF_RESP_FUNC_FAILED;
} else {
ret = TMF_RESP_FUNC_FAILED;
dev_err(&ihost->pdev->dev,
"%s: iport = %p; scic_port_hard_reset call"
" failed 0x%x\n",
__func__, iport, status);
}
/* If the hard reset for the port has failed, consider this
* the same as link failures on all phys in the port.
*/
if (ret != TMF_RESP_FUNC_COMPLETE) {
dev_err(&ihost->pdev->dev,
"%s: iport = %p; hard reset failed "
"(0x%x) - sending link down to libsas for phy %p\n",
__func__, iport, iport->hard_reset_status, iphy);
isci_port_link_down(ihost, iphy, iport);
}
return ret;
}
/**
* isci_port_deformed() - This function is called by libsas when a port becomes
* inactive.
* @phy: This parameter specifies the libsas phy with the inactive port.
*
*/
void isci_port_deformed(struct asd_sas_phy *phy)
{
pr_debug("%s: sas_phy = %p\n", __func__, phy);
}
/**
* isci_port_formed() - This function is called by libsas when a port becomes
* active.
* @phy: This parameter specifies the libsas phy with the active port.
*
*/
void isci_port_formed(struct asd_sas_phy *phy)
{
pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
}
drivers/scsi/isci/port.h
View file @ e2f8db50
......@@ -58,7 +58,10 @@
#include <scsi/libsas.h>
#include "isci.h"
#include "scic_sds_port.h"
#include "sas.h"
#include "phy.h"
#define SCIC_SDS_DUMMY_PORT 0xFF
struct isci_phy;
struct isci_host;
......@@ -72,6 +75,111 @@ enum isci_status {
isci_stopped = 0x05,
};
/**
* struct scic_sds_port
*
* The core port object provides the the abstraction for an SCU port.
*/
struct scic_sds_port {
/**
* This field contains the information for the base port state machine.
*/
struct sci_base_state_machine state_machine;
/**
* This field is the port index that is reported to the SCI USER.
* This allows the actual hardware physical port to change without
* the SCI USER getting a different answer for the get port index.
*/
u8 logical_port_index;
/**
* This field is the port index used to program the SCU hardware.
*/
u8 physical_port_index;
/**
* This field contains the active phy mask for the port.
* This mask is used in conjunction with the phy state to determine
* which phy to select for some port operations.
*/
u8 active_phy_mask;
u16 reserved_rni;
u16 reserved_tci;
/**
* This field contains the count of the io requests started on this port
* object. It is used to control controller shutdown.
*/
u32 started_request_count;
/**
* This field contains the number of devices assigned to this port.
* It is used to control port start requests.
*/
u32 assigned_device_count;
/**
* This field contains the reason for the port not going ready. It is
* assigned in the state handlers and used in the state transition.
*/
u32 not_ready_reason;
/**
* This field is the table of phys assigned to the port.
*/
struct scic_sds_phy *phy_table[SCI_MAX_PHYS];
/**
* This field is a pointer back to the controller that owns this
* port object.
*/
struct scic_sds_controller *owning_controller;
/**
* This field contains the port start/stop timer handle.
*/
void *timer_handle;
/**
* This field points to the current set of state handlers for this port
* object. These state handlers are assigned at each enter state of
* the state machine.
*/
struct scic_sds_port_state_handler *state_handlers;
/**
* This field is the ready substate machine for the port.
*/
struct sci_base_state_machine ready_substate_machine;
/* / Memory mapped hardware register space */
/**
* This field is the pointer to the port task scheduler registers
* for the SCU hardware.
*/
struct scu_port_task_scheduler_registers __iomem
*port_task_scheduler_registers;
/**
* This field is identical for all port objects and points to the port
* task scheduler group PE configuration registers.
* It is used to assign PEs to a port.
*/
u32 __iomem *port_pe_configuration_register;
/**
* This field is the VIIT register space for ths port object.
*/
struct scu_viit_entry __iomem *viit_registers;
};
/**
* struct isci_port - This class represents the port object used to internally
* represent libsas port objects. It also keeps a list of remote device
......@@ -99,54 +207,301 @@ static inline struct isci_port *sci_port_to_iport(struct scic_sds_port *sci_port
return iport;
}
enum isci_status isci_port_get_state(
struct isci_port *isci_port);
enum scic_port_not_ready_reason_code {
SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS,
SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED,
SCIC_PORT_NOT_READY_INVALID_PORT_CONFIGURATION,
SCIC_PORT_NOT_READY_RECONFIGURING,
SCIC_PORT_NOT_READY_REASON_CODE_MAX
};
struct scic_port_end_point_properties {
struct sci_sas_address sas_address;
struct scic_phy_proto protocols;
};
struct scic_port_properties {
u32 index;
struct scic_port_end_point_properties local;
struct scic_port_end_point_properties remote;
u32 phy_mask;
};
/**
* enum SCIC_SDS_PORT_READY_SUBSTATES -
*
* This enumeration depicts all of the states for the core port ready substate
* machine.
*/
enum scic_sds_port_ready_substates {
/**
* The substate where the port is started and ready but has no
* active phys.
*/
SCIC_SDS_PORT_READY_SUBSTATE_WAITING,
/**
* The substate where the port is started and ready and there is
* at least one phy operational.
*/
SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL,
/**
* The substate where the port is started and there was an
* add/remove phy event. This state is only used in Automatic
* Port Configuration Mode (APC)
*/
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING,
SCIC_SDS_PORT_READY_MAX_SUBSTATES
};
/**
* enum scic_sds_port_states - This enumeration depicts all the states for the
* common port state machine.
*
*
*/
enum scic_sds_port_states {
/**
* This state indicates that the port has successfully been stopped.
* In this state no new IO operations are permitted.
* This state is entered from the STOPPING state.
*/
SCI_BASE_PORT_STATE_STOPPED,
/**
* This state indicates that the port is in the process of stopping.
* In this state no new IO operations are permitted, but existing IO
* operations are allowed to complete.
* This state is entered from the READY state.
*/
SCI_BASE_PORT_STATE_STOPPING,
/**
* This state indicates the port is now ready. Thus, the user is
* able to perform IO operations on this port.
* This state is entered from the STARTING state.
*/
SCI_BASE_PORT_STATE_READY,
/**
* This state indicates the port is in the process of performing a hard
* reset. Thus, the user is unable to perform IO operations on this
* port.
* This state is entered from the READY state.
*/
SCI_BASE_PORT_STATE_RESETTING,
/**
* This state indicates the port has failed a reset request. This state
* is entered when a port reset request times out.
* This state is entered from the RESETTING state.
*/
SCI_BASE_PORT_STATE_FAILED,
SCI_BASE_PORT_MAX_STATES
};
struct scic_sds_remote_device;
struct scic_sds_request;
void isci_port_formed(
struct asd_sas_phy *);
typedef enum sci_status (*scic_sds_port_handler_t)(struct scic_sds_port *);
void isci_port_deformed(
struct asd_sas_phy *);
typedef enum sci_status (*scic_sds_port_phy_handler_t)(struct scic_sds_port *,
struct scic_sds_phy *);
void isci_port_bc_change_received(
struct isci_host *isci_host,
struct scic_sds_port *port,
struct scic_sds_phy *phy);
typedef enum sci_status (*scic_sds_port_reset_handler_t)(struct scic_sds_port *,
u32 timeout);
void isci_port_link_up(
struct isci_host *isci_host,
struct scic_sds_port *port,
struct scic_sds_phy *phy);
typedef enum sci_status (*scic_sds_port_event_handler_t)(struct scic_sds_port *, u32);
void isci_port_link_down(
struct isci_host *isci_host,
struct isci_phy *isci_phy,
struct isci_port *port);
typedef enum sci_status (*scic_sds_port_frame_handler_t)(struct scic_sds_port *, u32);
void isci_port_ready(
struct isci_host *isci_host,
typedef void (*scic_sds_port_link_handler_t)(struct scic_sds_port *, struct scic_sds_phy *);
typedef enum sci_status (*scic_sds_port_io_request_handler_t)(struct scic_sds_port *,
struct scic_sds_remote_device *,
struct scic_sds_request *);
struct scic_sds_port_state_handler {
/**
* The start_handler specifies the method invoked when a user
* attempts to start a port.
*/
scic_sds_port_handler_t start_handler;
/**
* The stop_handler specifies the method invoked when a user
* attempts to stop a port.
*/
scic_sds_port_handler_t stop_handler;
/**
* The destruct_handler specifies the method invoked when attempting to
* destruct a port.
*/
scic_sds_port_handler_t destruct_handler;
/**
* The reset_handler specifies the method invoked when a user
* attempts to hard reset a port.
*/
scic_sds_port_reset_handler_t reset_handler;
/**
* The add_phy_handler specifies the method invoked when a user
* attempts to add another phy into the port.
*/
scic_sds_port_phy_handler_t add_phy_handler;
/**
* The remove_phy_handler specifies the method invoked when a user
* attempts to remove a phy from the port.
*/
scic_sds_port_phy_handler_t remove_phy_handler;
scic_sds_port_frame_handler_t frame_handler;
scic_sds_port_event_handler_t event_handler;
scic_sds_port_link_handler_t link_up_handler;
scic_sds_port_link_handler_t link_down_handler;
scic_sds_port_io_request_handler_t start_io_handler;
scic_sds_port_io_request_handler_t complete_io_handler;
};
/**
* scic_sds_port_get_controller() -
*
* Helper macro to get the owning controller of this port
*/
#define scic_sds_port_get_controller(this_port) \
((this_port)->owning_controller)
/**
* scic_sds_port_set_base_state_handlers() -
*
* This macro will change the state handlers to those of the specified state id
*/
#define scic_sds_port_set_base_state_handlers(this_port, state_id) \
scic_sds_port_set_state_handlers(\
(this_port), &scic_sds_port_state_handler_table[(state_id)])
/**
* scic_sds_port_set_state_handlers() -
*
* Helper macro to set the port object state handlers
*/
#define scic_sds_port_set_state_handlers(this_port, handlers) \
((this_port)->state_handlers = (handlers))
/**
* scic_sds_port_get_index() -
*
* This macro returns the physical port index for this port object
*/
#define scic_sds_port_get_index(this_port) \
((this_port)->physical_port_index)
static inline void scic_sds_port_decrement_request_count(struct scic_sds_port *sci_port)
{
if (WARN_ONCE(sci_port->started_request_count == 0,
"%s: tried to decrement started_request_count past 0!?",
__func__))
/* pass */;
else
sci_port->started_request_count--;
}
#define scic_sds_port_active_phy(port, phy) \
(((port)->active_phy_mask & (1 << (phy)->phy_index)) != 0)
void scic_sds_port_construct(
struct scic_sds_port *sci_port,
u8 port_index,
struct scic_sds_controller *scic);
enum sci_status scic_sds_port_initialize(
struct scic_sds_port *sci_port,
void __iomem *port_task_scheduler_registers,
void __iomem *port_configuration_regsiter,
void __iomem *viit_registers);
enum sci_status scic_sds_port_add_phy(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
enum sci_status scic_sds_port_remove_phy(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
void scic_sds_port_setup_transports(
struct scic_sds_port *sci_port,
u32 device_id);
void scic_sds_port_deactivate_phy(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy,
bool do_notify_user);
bool scic_sds_port_link_detected(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
void scic_sds_port_link_up(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
void scic_sds_port_link_down(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
enum sci_status scic_sds_port_start_io(
struct scic_sds_port *sci_port,
struct scic_sds_remote_device *sci_dev,
struct scic_sds_request *sci_req);
enum sci_status scic_sds_port_complete_io(
struct scic_sds_port *sci_port,
struct scic_sds_remote_device *sci_dev,
struct scic_sds_request *sci_req);
enum sas_linkrate scic_sds_port_get_max_allowed_speed(
struct scic_sds_port *sci_port);
void scic_sds_port_broadcast_change_received(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
bool scic_sds_port_is_valid_phy_assignment(
struct scic_sds_port *sci_port,
u32 phy_index);
void scic_sds_port_get_sas_address(
struct scic_sds_port *sci_port,
struct sci_sas_address *sas_address);
void scic_sds_port_get_attached_sas_address(
struct scic_sds_port *sci_port,
struct sci_sas_address *sas_address);
enum isci_status isci_port_get_state(
struct isci_port *isci_port);
void isci_port_not_ready(
struct isci_host *isci_host,
struct isci_port *port);
void isci_port_formed(struct asd_sas_phy *);
void isci_port_deformed(struct asd_sas_phy *);
void isci_port_init(
struct isci_port *port,
struct isci_host *host,
int index);
void isci_port_hard_reset_complete(
struct isci_port *isci_port,
enum sci_status completion_status);
int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
struct isci_phy *iphy);
void isci_port_stop_complete(
struct scic_sds_controller *scic,
struct scic_sds_port *sci_port,
enum sci_status completion_status);
#endif /* !defined(_ISCI_PORT_H_) */
drivers/scsi/isci/core/scic_sds_port_configuration_agent.c → drivers/scsi/isci/port_config.c
View file @ e2f8db50
......@@ -54,7 +54,6 @@
*/
#include "host.h"
#include "scic_sds_port_configuration_agent.h"
#include "timers.h"
#define SCIC_SDS_MPC_RECONFIGURATION_TIMEOUT (10)
......
drivers/scsi/isci/probe_roms.h
View file @ e2f8db50
......@@ -60,15 +60,117 @@
#include <linux/pci.h>
#include "isci.h"
struct isci_orom *isci_request_oprom(struct pci_dev *pdev);
#define SCIC_SDS_PARM_NO_SPEED 0
/* generation 1 (i.e. 1.5 Gb/s) */
#define SCIC_SDS_PARM_GEN1_SPEED 1
/* generation 2 (i.e. 3.0 Gb/s) */
#define SCIC_SDS_PARM_GEN2_SPEED 2
/* generation 3 (i.e. 6.0 Gb/s) */
#define SCIC_SDS_PARM_GEN3_SPEED 3
#define SCIC_SDS_PARM_MAX_SPEED SCIC_SDS_PARM_GEN3_SPEED
/* parameters that can be set by module parameters */
struct scic_sds_user_parameters {
struct sci_phy_user_params {
/**
* This field specifies the NOTIFY (ENABLE SPIN UP) primitive
* insertion frequency for this phy index.
*/
u32 notify_enable_spin_up_insertion_frequency;
/**
* This method specifies the number of transmitted DWORDs within which
* to transmit a single ALIGN primitive. This value applies regardless
* of what type of device is attached or connection state. A value of
* 0 indicates that no ALIGN primitives will be inserted.
*/
u16 align_insertion_frequency;
/**
* This method specifies the number of transmitted DWORDs within which
* to transmit 2 ALIGN primitives. This applies for SAS connections
* only. A minimum value of 3 is required for this field.
*/
u16 in_connection_align_insertion_frequency;
/**
* This field indicates the maximum speed generation to be utilized
* by phys in the supplied port.
* - A value of 1 indicates generation 1 (i.e. 1.5 Gb/s).
* - A value of 2 indicates generation 2 (i.e. 3.0 Gb/s).
* - A value of 3 indicates generation 3 (i.e. 6.0 Gb/s).
*/
u8 max_speed_generation;
} phys[SCI_MAX_PHYS];
/**
* This field specifies the maximum number of direct attached devices
* that can have power supplied to them simultaneously.
*/
u8 max_number_concurrent_device_spin_up;
/**
* This field specifies the number of seconds to allow a phy to consume
* power before yielding to another phy.
*
*/
u8 phy_spin_up_delay_interval;
/**
* These timer values specifies how long a link will remain open with no
* activity in increments of a microsecond, it can be in increments of
* 100 microseconds if the upper most bit is set.
*
*/
u16 stp_inactivity_timeout;
u16 ssp_inactivity_timeout;
/**
* These timer values specifies how long a link will remain open in increments
* of 100 microseconds.
*
*/
u16 stp_max_occupancy_timeout;
u16 ssp_max_occupancy_timeout;
/**
* This timer value specifies how long a link will remain open with no
* outbound traffic in increments of a microsecond.
*
*/
u8 no_outbound_task_timeout;
};
/* XXX kill this union */
union scic_user_parameters {
/**
* This field specifies the user parameters specific to the
* Storage Controller Unit (SCU) Driver Standard (SDS) version
* 1.
*/
struct scic_sds_user_parameters sds1;
};
#define SCIC_SDS_PARM_PHY_MASK_MIN 0x0
#define SCIC_SDS_PARM_PHY_MASK_MAX 0xF
#define MAX_CONCURRENT_DEVICE_SPIN_UP_COUNT 4
struct scic_sds_oem_params;
int scic_oem_parameters_validate(struct scic_sds_oem_params *oem);
union scic_oem_parameters;
struct isci_orom;
void scic_oem_parameters_get(struct scic_sds_controller *scic,
union scic_oem_parameters *oem);
enum sci_status isci_parse_oem_parameters(
union scic_oem_parameters *oem_params,
struct isci_orom *orom,
int scu_index);
struct isci_orom;
struct isci_orom *isci_request_oprom(struct pci_dev *pdev);
enum sci_status isci_parse_oem_parameters(union scic_oem_parameters *oem,
struct isci_orom *orom, int scu_index);
struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw);
struct isci_orom *isci_get_efi_var(struct pci_dev *pdev);
......@@ -153,6 +255,16 @@ struct scic_sds_oem_params {
} phys[SCI_MAX_PHYS];
} __attribute__ ((packed));
/* XXX kill this union */
union scic_oem_parameters {
/**
* This field specifies the OEM parameters specific to the
* Storage Controller Unit (SCU) Driver Standard (SDS) version
* 1.
*/
struct scic_sds_oem_params sds1;
};
struct isci_orom {
struct sci_bios_oem_param_block_hdr hdr;
struct scic_sds_oem_params ctrl[SCI_MAX_CONTROLLERS];
......
drivers/scsi/isci/remote_device.c
View file @ e2f8db50
......@@ -57,8 +57,6 @@
#include "port.h"
#include "remote_device.h"
#include "request.h"
#include "scic_port.h"
#include "scic_sds_port.h"
#include "remote_node_context.h"
#include "scu_event_codes.h"
#include "task.h"
......
drivers/scsi/isci/remote_node_context.c
View file @ e2f8db50
......@@ -55,7 +55,6 @@
#include "host.h"
#include "state_machine.h"
#include "scic_sds_port.h"
#include "remote_device.h"
#include "remote_node_context.h"
#include "scu_event_codes.h"
......
drivers/scsi/isci/request.c
View file @ e2f8db50
......@@ -54,7 +54,6 @@
*/
#include "isci.h"
#include "scic_port.h"
#include "task.h"
#include "request.h"
#include "sata.h"
......
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