/*
* 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 "isci.h"
#include "host.h"
#include "phy.h"
#include "scu_event_codes.h"
#include "scic_port.h"
#include "scic_config_parameters.h"
#include "timers.h"
/* Maximum arbitration wait time in micro-seconds */
#define SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME (700)
enum sas_linkrate sci_phy_linkrate(struct scic_sds_phy *sci_phy)
{
return sci_phy->max_negotiated_speed;
}
/*
* *****************************************************************************
* * SCIC SDS PHY Internal Methods
* ***************************************************************************** */
/**
* This method will initialize the phy transport layer registers
* @sci_phy:
* @transport_layer_registers
*
* enum sci_status
*/
static enum sci_status scic_sds_phy_transport_layer_initialization(
struct scic_sds_phy *sci_phy,
struct scu_transport_layer_registers __iomem *transport_layer_registers)
{
u32 tl_control;
sci_phy->transport_layer_registers = transport_layer_registers;
writel(SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX,
&sci_phy->transport_layer_registers->stp_rni);
/*
* Hardware team recommends that we enable the STP prefetch for all
* transports
*/
tl_control = readl(&sci_phy->transport_layer_registers->control);
tl_control |= SCU_TLCR_GEN_BIT(STP_WRITE_DATA_PREFETCH);
writel(tl_control, &sci_phy->transport_layer_registers->control);
return SCI_SUCCESS;
}
/**
* This method will initialize the phy link layer registers
* @sci_phy:
* @link_layer_registers:
*
* enum sci_status
*/
static enum sci_status
scic_sds_phy_link_layer_initialization(struct scic_sds_phy *sci_phy,
struct scu_link_layer_registers __iomem *link_layer_registers)
{
struct scic_sds_controller *scic =
sci_phy->owning_port->owning_controller;
int phy_idx = sci_phy->phy_index;
struct sci_phy_user_params *phy_user =
&scic->user_parameters.sds1.phys[phy_idx];
struct sci_phy_oem_params *phy_oem =
&scic->oem_parameters.sds1.phys[phy_idx];
u32 phy_configuration;
struct scic_phy_cap phy_cap;
u32 parity_check = 0;
u32 parity_count = 0;
u32 llctl, link_rate;
u32 clksm_value = 0;
sci_phy->link_layer_registers = link_layer_registers;
/* Set our IDENTIFY frame data */
#define SCI_END_DEVICE 0x01
writel(SCU_SAS_TIID_GEN_BIT(SMP_INITIATOR) |
SCU_SAS_TIID_GEN_BIT(SSP_INITIATOR) |
SCU_SAS_TIID_GEN_BIT(STP_INITIATOR) |
SCU_SAS_TIID_GEN_BIT(DA_SATA_HOST) |
SCU_SAS_TIID_GEN_VAL(DEVICE_TYPE, SCI_END_DEVICE),
&sci_phy->link_layer_registers->transmit_identification);
/* Write the device SAS Address */
writel(0xFEDCBA98,
&sci_phy->link_layer_registers->sas_device_name_high);
writel(phy_idx, &sci_phy->link_layer_registers->sas_device_name_low);
/* Write the source SAS Address */
writel(phy_oem->sas_address.high,
&sci_phy->link_layer_registers->source_sas_address_high);
writel(phy_oem->sas_address.low,
&sci_phy->link_layer_registers->source_sas_address_low);
/* Clear and Set the PHY Identifier */
writel(0, &sci_phy->link_layer_registers->identify_frame_phy_id);
writel(SCU_SAS_TIPID_GEN_VALUE(ID, phy_idx),
&sci_phy->link_layer_registers->identify_frame_phy_id);
/* Change the initial state of the phy configuration register */
phy_configuration =
readl(&sci_phy->link_layer_registers->phy_configuration);
/* Hold OOB state machine in reset */
phy_configuration |= SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
writel(phy_configuration,
&sci_phy->link_layer_registers->phy_configuration);
/* Configure the SNW capabilities */
phy_cap.all = 0;
phy_cap.start = 1;
phy_cap.gen3_no_ssc = 1;
phy_cap.gen2_no_ssc = 1;
phy_cap.gen1_no_ssc = 1;
if (scic->oem_parameters.sds1.controller.do_enable_ssc == true) {
phy_cap.gen3_ssc = 1;
phy_cap.gen2_ssc = 1;
phy_cap.gen1_ssc = 1;
}
/*
* The SAS specification indicates that the phy_capabilities that
* are transmitted shall have an even parity. Calculate the parity. */
parity_check = phy_cap.all;
while (parity_check != 0) {
if (parity_check & 0x1)
parity_count++;
parity_check >>= 1;
}
/*
* If parity indicates there are an odd number of bits set, then
* set the parity bit to 1 in the phy capabilities. */
if ((parity_count % 2) != 0)
phy_cap.parity = 1;
writel(phy_cap.all, &sci_phy->link_layer_registers->phy_capabilities);
/* Set the enable spinup period but disable the ability to send
* notify enable spinup
*/
writel(SCU_ENSPINUP_GEN_VAL(COUNT,
phy_user->notify_enable_spin_up_insertion_frequency),
&sci_phy->link_layer_registers->notify_enable_spinup_control);
/* Write the ALIGN Insertion Ferequency for connected phy and
* inpendent of connected state
*/
clksm_value = SCU_ALIGN_INSERTION_FREQUENCY_GEN_VAL(CONNECTED,
phy_user->in_connection_align_insertion_frequency);
clksm_value |= SCU_ALIGN_INSERTION_FREQUENCY_GEN_VAL(GENERAL,
phy_user->align_insertion_frequency);
writel(clksm_value, &sci_phy->link_layer_registers->clock_skew_management);
/* @todo Provide a way to write this register correctly */
writel(0x02108421,
&sci_phy->link_layer_registers->afe_lookup_table_control);
llctl = SCU_SAS_LLCTL_GEN_VAL(NO_OUTBOUND_TASK_TIMEOUT,
(u8)scic->user_parameters.sds1.no_outbound_task_timeout);
switch(phy_user->max_speed_generation) {
case SCIC_SDS_PARM_GEN3_SPEED:
link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN3;
break;
case SCIC_SDS_PARM_GEN2_SPEED:
link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN2;
break;
default:
link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN1;
break;
}
llctl |= SCU_SAS_LLCTL_GEN_VAL(MAX_LINK_RATE, link_rate);
writel(llctl, &sci_phy->link_layer_registers->link_layer_control);
if (is_a0() || is_a2()) {
/* Program the max ARB time for the PHY to 700us so we inter-operate with
* the PMC expander which shuts down PHYs if the expander PHY generates too
* many breaks. This time value will guarantee that the initiator PHY will
* generate the break.
*/
writel(SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME,
&sci_phy->link_layer_registers->maximum_arbitration_wait_timer_timeout);
}
/*
* Set the link layer hang detection to 500ms (0x1F4) from its default
* value of 128ms. Max value is 511 ms.
*/
writel(0x1F4, &sci_phy->link_layer_registers->link_layer_hang_detection_timeout);
/* We can exit the initial state to the stopped state */
sci_base_state_machine_change_state(&sci_phy->state_machine,
SCI_BASE_PHY_STATE_STOPPED);
return SCI_SUCCESS;
}
/**
* This function will handle the sata SIGNATURE FIS timeout condition. It will
* restart the starting substate machine since we dont know what has actually
* happening.
*/
static void scic_sds_phy_sata_timeout(void *phy)
{
struct scic_sds_phy *sci_phy = phy;
dev_dbg(sciphy_to_dev(sci_phy),
"%s: SCIC SDS Phy 0x%p did not receive signature fis before "
"timeout.\n",
__func__,
sci_phy);
sci_base_state_machine_stop(&sci_phy->starting_substate_machine);
sci_base_state_machine_change_state(&sci_phy->state_machine,
SCI_BASE_PHY_STATE_STARTING);
}
/**
* This method returns the port currently containing this phy. If the phy is
* currently contained by the dummy port, then the phy is considered to not
* be part of a port.
* @sci_phy: This parameter specifies the phy for which to retrieve the
* containing port.
*
* This method returns a handle to a port that contains the supplied phy.
* NULL This value is returned if the phy is not part of a real
* port (i.e. it's contained in the dummy port). !NULL All other
* values indicate a handle/pointer to the port containing the phy.
*/
struct scic_sds_port *scic_sds_phy_get_port(
struct scic_sds_phy *sci_phy)
{
if (scic_sds_port_get_index(sci_phy->owning_port) == SCIC_SDS_DUMMY_PORT)
return NULL;
return sci_phy->owning_port;
}
/**
* This method will assign a port to the phy object.
* @out]: sci_phy This parameter specifies the phy for which to assign a port
* object.
*
*
*/
void scic_sds_phy_set_port(
struct scic_sds_phy *sci_phy,
struct scic_sds_port *sci_port)
{
sci_phy->owning_port = sci_port;
if (sci_phy->bcn_received_while_port_unassigned) {
sci_phy->bcn_received_while_port_unassigned = false;
scic_sds_port_broadcast_change_received(sci_phy->owning_port, sci_phy);
}
}
/**
* This method will initialize the constructed phy
* @sci_phy:
* @link_layer_registers:
*
* enum sci_status
*/
enum sci_status scic_sds_phy_initialize(
struct scic_sds_phy *sci_phy,
struct scu_transport_layer_registers __iomem *transport_layer_registers,
struct scu_link_layer_registers __iomem *link_layer_registers)
{
struct scic_sds_controller *scic = scic_sds_phy_get_controller(sci_phy);
struct isci_host *ihost = scic_to_ihost(scic);
/* Create the SIGNATURE FIS Timeout timer for this phy */
sci_phy->sata_timeout_timer =
isci_timer_create(
ihost,
sci_phy,
scic_sds_phy_sata_timeout);
/* Perfrom the initialization of the TL hardware */
scic_sds_phy_transport_layer_initialization(
sci_phy,
transport_layer_registers);
/* Perofrm the initialization of the PE hardware */
scic_sds_phy_link_layer_initialization(sci_phy, link_layer_registers);
/*
* There is nothing that needs to be done in this state just
* transition to the stopped state. */
sci_base_state_machine_change_state(&sci_phy->state_machine,
SCI_BASE_PHY_STATE_STOPPED);
return SCI_SUCCESS;
}
/**
* This method assigns the direct attached device ID for this phy.
*
* @sci_phy The phy for which the direct attached device id is to
* be assigned.
* @device_id The direct attached device ID to assign to the phy.
* This will either be the RNi for the device or an invalid RNi if there
* is no current device assigned to the phy.
*/
void scic_sds_phy_setup_transport(
struct scic_sds_phy *sci_phy,
u32 device_id)
{
u32 tl_control;
writel(device_id, &sci_phy->transport_layer_registers->stp_rni);
/*
* The read should guarantee that the first write gets posted
* before the next write
*/
tl_control = readl(&sci_phy->transport_layer_registers->control);
tl_control |= SCU_TLCR_GEN_BIT(CLEAR_TCI_NCQ_MAPPING_TABLE);
writel(tl_control, &sci_phy->transport_layer_registers->control);
}
/**
*
* @sci_phy: The phy object to be suspended.
*
* This function will perform the register reads/writes to suspend the SCU
* hardware protocol engine. none
*/
static void scic_sds_phy_suspend(
struct scic_sds_phy *sci_phy)
{
u32 scu_sas_pcfg_value;
scu_sas_pcfg_value =
readl(&sci_phy->link_layer_registers->phy_configuration);
scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE);
writel(scu_sas_pcfg_value,
&sci_phy->link_layer_registers->phy_configuration);
scic_sds_phy_setup_transport(
sci_phy,
SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX);
}
void scic_sds_phy_resume(struct scic_sds_phy *sci_phy)
{
u32 scu_sas_pcfg_value;
scu_sas_pcfg_value =
readl(&sci_phy->link_layer_registers->phy_configuration);
scu_sas_pcfg_value &= ~SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE);
writel(scu_sas_pcfg_value,
&sci_phy->link_layer_registers->phy_configuration);
}
void scic_sds_phy_get_sas_address(struct scic_sds_phy *sci_phy,
struct sci_sas_address *sas_address)
{
sas_address->high = readl(&sci_phy->link_layer_registers->source_sas_address_high);
sas_address->low = readl(&sci_phy->link_layer_registers->source_sas_address_low);
}
void scic_sds_phy_get_attached_sas_address(struct scic_sds_phy *sci_phy,
struct sci_sas_address *sas_address)
{
struct sas_identify_frame *iaf;
struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
iaf = &iphy->frame_rcvd.iaf;
memcpy(sas_address, iaf->sas_addr, SAS_ADDR_SIZE);
}
void scic_sds_phy_get_protocols(struct scic_sds_phy *sci_phy,
struct scic_phy_proto *protocols)
{
protocols->all =
(u16)(readl(&sci_phy->
link_layer_registers->transmit_identification) &
0x0000FFFF);
}
/**
* This method will attempt to start the phy object. This request is only valid
* when the phy is in the stopped state
* @sci_phy:
*
* enum sci_status
*/
enum sci_status scic_sds_phy_start(struct scic_sds_phy *sci_phy)
{
return sci_phy->state_handlers->start_handler(sci_phy);
}
/**
* This method will attempt to stop the phy object.
* @sci_phy:
*
* enum sci_status SCI_SUCCESS if the phy is going to stop SCI_INVALID_STATE
* if the phy is not in a valid state to stop
*/
enum sci_status scic_sds_phy_stop(struct scic_sds_phy *sci_phy)
{
return sci_phy->state_handlers->stop_handler(sci_phy);
}
/**
* This method will attempt to reset the phy. This request is only valid when
* the phy is in an ready state
* @sci_phy:
*
* enum sci_status
*/
enum sci_status scic_sds_phy_reset(
struct scic_sds_phy *sci_phy)
{
return sci_phy->state_handlers->reset_handler(sci_phy);
}
/**
* This method will process the event code received.
* @sci_phy:
* @event_code:
*
* enum sci_status
*/
enum sci_status scic_sds_phy_event_handler(
struct scic_sds_phy *sci_phy,
u32 event_code)
{
return sci_phy->state_handlers->event_handler(sci_phy, event_code);
}
/**
* This method will process the frame index received.
* @sci_phy:
* @frame_index:
*
* enum sci_status
*/
enum sci_status scic_sds_phy_frame_handler(
struct scic_sds_phy *sci_phy,
u32 frame_index)
{
return sci_phy->state_handlers->frame_handler(sci_phy, frame_index);
}
/**
* This method will give the phy permission to consume power
* @sci_phy:
*
* enum sci_status
*/
enum sci_status scic_sds_phy_consume_power_handler(
struct scic_sds_phy *sci_phy)
{
return sci_phy->state_handlers->consume_power_handler(sci_phy);
}
/*
* *****************************************************************************
* * SCIC SDS PHY HELPER FUNCTIONS
* ***************************************************************************** */
/**
*
* @sci_phy: The phy object that received SAS PHY DETECTED.
*
* This method continues the link training for the phy as if it were a SAS PHY
* instead of a SATA PHY. This is done because the completion queue had a SAS
* PHY DETECTED event when the state machine was expecting a SATA PHY event.
* none
*/
static void scic_sds_phy_start_sas_link_training(
struct scic_sds_phy *sci_phy)
{
u32 phy_control;
phy_control =
readl(&sci_phy->link_layer_registers->phy_configuration);
phy_control |= SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD);
writel(phy_control,
&sci_phy->link_layer_registers->phy_configuration);
sci_base_state_machine_change_state(
&sci_phy->starting_substate_machine,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN
);
sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_SAS;
}
/**
*
* @sci_phy: The phy object that received a SATA SPINUP HOLD event
*
* This method continues the link training for the phy as if it were a SATA PHY
* instead of a SAS PHY. This is done because the completion queue had a SATA
* SPINUP HOLD event when the state machine was expecting a SAS PHY event. none
*/
static void scic_sds_phy_start_sata_link_training(
struct scic_sds_phy *sci_phy)
{
sci_base_state_machine_change_state(
&sci_phy->starting_substate_machine,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER
);
sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_SATA;
}
/**
* scic_sds_phy_complete_link_training - perform processing common to
* all protocols upon completion of link training.
* @sci_phy: This parameter specifies the phy object for which link training
* has completed.
* @max_link_rate: This parameter specifies the maximum link rate to be
* associated with this phy.
* @next_state: This parameter specifies the next state for the phy's starting
* sub-state machine.
*
*/
static void scic_sds_phy_complete_link_training(
struct scic_sds_phy *sci_phy,
enum sas_linkrate max_link_rate,
u32 next_state)
{
sci_phy->max_negotiated_speed = max_link_rate;
sci_base_state_machine_change_state(&sci_phy->starting_substate_machine,
next_state);
}
static void scic_sds_phy_restart_starting_state(
struct scic_sds_phy *sci_phy)
{
/* Stop the current substate machine */
sci_base_state_machine_stop(&sci_phy->starting_substate_machine);
/* Re-enter the base state machine starting state */
sci_base_state_machine_change_state(&sci_phy->state_machine,
SCI_BASE_PHY_STATE_STARTING);
}
/* ****************************************************************************
* SCIC SDS PHY general handlers
************************************************************************** */
static enum sci_status scic_sds_phy_starting_substate_general_stop_handler(
struct scic_sds_phy *phy)
{
sci_base_state_machine_stop(&phy->starting_substate_machine);
sci_base_state_machine_change_state(&phy->state_machine,
SCI_BASE_PHY_STATE_STOPPED);
return SCI_SUCCESS;
}
/*
* *****************************************************************************
* * SCIC SDS PHY EVENT_HANDLERS
* ***************************************************************************** */
/**
*
* @phy: This struct scic_sds_phy object which has received an event.
* @event_code: This is the event code which the phy object is to decode.
*
* This method is called when an event notification is received for the phy
* object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SPEED_EN. -
* decode the event - sas phy detected causes a state transition to the wait
* for speed event notification. - any other events log a warning message and
* set a failure status enum sci_status SCI_SUCCESS on any valid event notification
* SCI_FAILURE on any unexpected event notifation
*/
static enum sci_status scic_sds_phy_starting_substate_await_ossp_event_handler(
struct scic_sds_phy *sci_phy,
u32 event_code)
{
u32 result = SCI_SUCCESS;
switch (scu_get_event_code(event_code)) {
case SCU_EVENT_SAS_PHY_DETECTED:
scic_sds_phy_start_sas_link_training(sci_phy);
sci_phy->is_in_link_training = true;
break;
case SCU_EVENT_SATA_SPINUP_HOLD:
scic_sds_phy_start_sata_link_training(sci_phy);
sci_phy->is_in_link_training = true;
break;
default:
dev_dbg(sciphy_to_dev(sci_phy),
"%s: PHY starting substate machine received "
"unexpected event_code %x\n",
__func__,
event_code);
result = SCI_FAILURE;
break;
}
return result;
}
/**
*
* @phy: This struct scic_sds_phy object which has received an event.
* @event_code: This is the event code which the phy object is to decode.
*
* This method is called when an event notification is received for the phy
* object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SPEED_EN. -
* decode the event - sas phy detected returns us back to this state. - speed
* event detected causes a state transition to the wait for iaf. - identify
* timeout is an un-expected event and the state machine is restarted. - link
* failure events restart the starting state machine - any other events log a
* warning message and set a failure status enum sci_status SCI_SUCCESS on any valid
* event notification SCI_FAILURE on any unexpected event notifation
*/
static enum sci_status scic_sds_phy_starting_substate_await_sas_phy_speed_event_handler(
struct scic_sds_phy *sci_phy,
u32 event_code)
{
u32 result = SCI_SUCCESS;
switch (scu_get_event_code(event_code)) {
case SCU_EVENT_SAS_PHY_DETECTED:
/*
* Why is this being reported again by the controller?
* We would re-enter this state so just stay here */
break;
case SCU_EVENT_SAS_15:
case SCU_EVENT_SAS_15_SSC:
scic_sds_phy_complete_link_training(
sci_phy,
SAS_LINK_RATE_1_5_GBPS,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF);
break;
case SCU_EVENT_SAS_30:
case SCU_EVENT_SAS_30_SSC:
scic_sds_phy_complete_link_training(
sci_phy,
SAS_LINK_RATE_3_0_GBPS,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF);
break;
case SCU_EVENT_SAS_60:
case SCU_EVENT_SAS_60_SSC:
scic_sds_phy_complete_link_training(
sci_phy,
SAS_LINK_RATE_6_0_GBPS,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF);
break;
case SCU_EVENT_SATA_SPINUP_HOLD:
/*
* We were doing SAS PHY link training and received a SATA PHY event
* continue OOB/SN as if this were a SATA PHY */
scic_sds_phy_start_sata_link_training(sci_phy);
break;
case SCU_EVENT_LINK_FAILURE:
/* Link failure change state back to the starting state */
scic_sds_phy_restart_starting_state(sci_phy);
break;
default:
dev_warn(sciphy_to_dev(sci_phy),
"%s: PHY starting substate machine received "
"unexpected event_code %x\n",
__func__,
event_code);
result = SCI_FAILURE;
break;
}
return result;
}
/**
*
* @phy: This struct scic_sds_phy object which has received an event.
* @event_code: This is the event code which the phy object is to decode.
*
* This method is called when an event notification is received for the phy
* object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF. -
* decode the event - sas phy detected event backs up the state machine to the
* await speed notification. - identify timeout is an un-expected event and the
* state machine is restarted. - link failure events restart the starting state
* machine - any other events log a warning message and set a failure status
* enum sci_status SCI_SUCCESS on any valid event notification SCI_FAILURE on any
* unexpected event notifation
*/
static enum sci_status scic_sds_phy_starting_substate_await_iaf_uf_event_handler(
struct scic_sds_phy *sci_phy,
u32 event_code)
{
u32 result = SCI_SUCCESS;
switch (scu_get_event_code(event_code)) {
case SCU_EVENT_SAS_PHY_DETECTED:
/* Backup the state machine */
scic_sds_phy_start_sas_link_training(sci_phy);
break;
case SCU_EVENT_SATA_SPINUP_HOLD:
/*
* We were doing SAS PHY link training and received a SATA PHY event
* continue OOB/SN as if this were a SATA PHY */
scic_sds_phy_start_sata_link_training(sci_phy);
break;
case SCU_EVENT_RECEIVED_IDENTIFY_TIMEOUT:
case SCU_EVENT_LINK_FAILURE:
case SCU_EVENT_HARD_RESET_RECEIVED:
/* Start the oob/sn state machine over again */
scic_sds_phy_restart_starting_state(sci_phy);
break;
default:
dev_warn(sciphy_to_dev(sci_phy),
"%s: PHY starting substate machine received "
"unexpected event_code %x\n",
__func__,
event_code);
result = SCI_FAILURE;
break;
}
return result;
}
/**
*
* @phy: This struct scic_sds_phy object which has received an event.
* @event_code: This is the event code which the phy object is to decode.
*
* This method is called when an event notification is received for the phy
* object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_POWER. -
* decode the event - link failure events restart the starting state machine -
* any other events log a warning message and set a failure status enum sci_status
* SCI_SUCCESS on a link failure event SCI_FAILURE on any unexpected event
* notifation
*/
static enum sci_status scic_sds_phy_starting_substate_await_sas_power_event_handler(
struct scic_sds_phy *sci_phy,
u32 event_code)
{
u32 result = SCI_SUCCESS;
switch (scu_get_event_code(event_code)) {
case SCU_EVENT_LINK_FAILURE:
/* Link failure change state back to the starting state */
scic_sds_phy_restart_starting_state(sci_phy);
break;
default:
dev_warn(sciphy_to_dev(sci_phy),
"%s: PHY starting substate machine received unexpected "
"event_code %x\n",
__func__,
event_code);
result = SCI_FAILURE;
break;
}
return result;
}
/**
*
* @phy: This struct scic_sds_phy object which has received an event.
* @event_code: This is the event code which the phy object is to decode.
*
* This method is called when an event notification is received for the phy
* object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER. -
* decode the event - link failure events restart the starting state machine -
* sata spinup hold events are ignored since they are expected - any other
* events log a warning message and set a failure status enum sci_status SCI_SUCCESS
* on a link failure event SCI_FAILURE on any unexpected event notifation
*/
static enum sci_status scic_sds_phy_starting_substate_await_sata_power_event_handler(
struct scic_sds_phy *sci_phy,
u32 event_code)
{
u32 result = SCI_SUCCESS;
switch (scu_get_event_code(event_code)) {
case SCU_EVENT_LINK_FAILURE:
/* Link failure change state back to the starting state */
scic_sds_phy_restart_starting_state(sci_phy);
break;
case SCU_EVENT_SATA_SPINUP_HOLD:
/* These events are received every 10ms and are expected while in this state */
break;
case SCU_EVENT_SAS_PHY_DETECTED:
/*
* There has been a change in the phy type before OOB/SN for the
* SATA finished start down the SAS link traning path. */
scic_sds_phy_start_sas_link_training(sci_phy);
break;
default:
dev_warn(sciphy_to_dev(sci_phy),
"%s: PHY starting substate machine received "
"unexpected event_code %x\n",
__func__,
event_code);
result = SCI_FAILURE;
break;
}
return result;
}
/**
* scic_sds_phy_starting_substate_await_sata_phy_event_handler -
* @phy: This struct scic_sds_phy object which has received an event.
* @event_code: This is the event code which the phy object is to decode.
*
* This method is called when an event notification is received for the phy
* object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN. -
* decode the event - link failure events restart the starting state machine -
* sata spinup hold events are ignored since they are expected - sata phy
* detected event change to the wait speed event - any other events log a
* warning message and set a failure status enum sci_status SCI_SUCCESS on a link
* failure event SCI_FAILURE on any unexpected event notifation
*/
static enum sci_status scic_sds_phy_starting_substate_await_sata_phy_event_handler(
struct scic_sds_phy *sci_phy, u32 event_code)
{
u32 result = SCI_SUCCESS;
switch (scu_get_event_code(event_code)) {
case SCU_EVENT_LINK_FAILURE:
/* Link failure change state back to the starting state */
scic_sds_phy_restart_starting_state(sci_phy);
break;
case SCU_EVENT_SATA_SPINUP_HOLD:
/* These events might be received since we dont know how many may be in
* the completion queue while waiting for power
*/
break;
case SCU_EVENT_SATA_PHY_DETECTED:
sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_SATA;
/* We have received the SATA PHY notification change state */
sci_base_state_machine_change_state(&sci_phy->starting_substate_machine,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN);
break;
case SCU_EVENT_SAS_PHY_DETECTED:
/* There has been a change in the phy type before OOB/SN for the
* SATA finished start down the SAS link traning path.
*/
scic_sds_phy_start_sas_link_training(sci_phy);
break;
default:
dev_warn(sciphy_to_dev(sci_phy),
"%s: PHY starting substate machine received "
"unexpected event_code %x\n",
__func__,
event_code);
result = SCI_FAILURE;
break;
}
return result;
}
/**
*
* @phy: This struct scic_sds_phy object which has received an event.
* @event_code: This is the event code which the phy object is to decode.
*
* This method is called when an event notification is received for the phy
* object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN.
* - decode the event - sata phy detected returns us back to this state. -
* speed event detected causes a state transition to the wait for signature. -
* link failure events restart the starting state machine - any other events
* log a warning message and set a failure status enum sci_status SCI_SUCCESS on any
* valid event notification SCI_FAILURE on any unexpected event notifation
*/
static enum sci_status scic_sds_phy_starting_substate_await_sata_speed_event_handler(
struct scic_sds_phy *sci_phy,
u32 event_code)
{
u32 result = SCI_SUCCESS;
switch (scu_get_event_code(event_code)) {
case SCU_EVENT_SATA_PHY_DETECTED:
/*
* The hardware reports multiple SATA PHY detected events
* ignore the extras */
break;
case SCU_EVENT_SATA_15:
case SCU_EVENT_SATA_15_SSC:
scic_sds_phy_complete_link_training(
sci_phy,
SAS_LINK_RATE_1_5_GBPS,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF);
break;
case SCU_EVENT_SATA_30:
case SCU_EVENT_SATA_30_SSC:
scic_sds_phy_complete_link_training(
sci_phy,
SAS_LINK_RATE_3_0_GBPS,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF);
break;
case SCU_EVENT_SATA_60:
case SCU_EVENT_SATA_60_SSC:
scic_sds_phy_complete_link_training(
sci_phy,
SAS_LINK_RATE_6_0_GBPS,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF);
break;
case SCU_EVENT_LINK_FAILURE:
/* Link failure change state back to the starting state */
scic_sds_phy_restart_starting_state(sci_phy);
break;
case SCU_EVENT_SAS_PHY_DETECTED:
/*
* There has been a change in the phy type before OOB/SN for the
* SATA finished start down the SAS link traning path. */
scic_sds_phy_start_sas_link_training(sci_phy);
break;
default:
dev_warn(sciphy_to_dev(sci_phy),
"%s: PHY starting substate machine received "
"unexpected event_code %x\n",
__func__,
event_code);
result = SCI_FAILURE;
break;
}
return result;
}
/**
* scic_sds_phy_starting_substate_await_sig_fis_event_handler -
* @phy: This struct scic_sds_phy object which has received an event.
* @event_code: This is the event code which the phy object is to decode.
*
* This method is called when an event notification is received for the phy
* object when in the state SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF. -
* decode the event - sas phy detected event backs up the state machine to the
* await speed notification. - identify timeout is an un-expected event and the
* state machine is restarted. - link failure events restart the starting state
* machine - any other events log a warning message and set a failure status
* enum sci_status SCI_SUCCESS on any valid event notification SCI_FAILURE on any
* unexpected event notifation
*/
static enum sci_status scic_sds_phy_starting_substate_await_sig_fis_event_handler(
struct scic_sds_phy *sci_phy, u32 event_code)
{
u32 result = SCI_SUCCESS;
switch (scu_get_event_code(event_code)) {
case SCU_EVENT_SATA_PHY_DETECTED:
/* Backup the state machine */
sci_base_state_machine_change_state(&sci_phy->starting_substate_machine,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN);
break;
case SCU_EVENT_LINK_FAILURE:
/* Link failure change state back to the starting state */
scic_sds_phy_restart_starting_state(sci_phy);
break;
default:
dev_warn(sciphy_to_dev(sci_phy),
"%s: PHY starting substate machine received "
"unexpected event_code %x\n",
__func__,
event_code);
result = SCI_FAILURE;
break;
}
return result;
}
/*
* *****************************************************************************
* * SCIC SDS PHY FRAME_HANDLERS
* ***************************************************************************** */
/**
*
* @phy: This is struct scic_sds_phy object which is being requested to decode the
* frame data.
* @frame_index: This is the index of the unsolicited frame which was received
* for this phy.
*
* This method decodes the unsolicited frame when the struct scic_sds_phy is in the
* SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF. - Get the UF Header - If the UF
* is an IAF - Copy IAF data to local phy object IAF data buffer. - Change
* starting substate to wait power. - else - log warning message of unexpected
* unsolicted frame - release frame buffer enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_phy_starting_substate_await_iaf_uf_frame_handler(
struct scic_sds_phy *sci_phy, u32 frame_index)
{
enum sci_status result;
u32 *frame_words;
struct sas_identify_frame iaf;
struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
result = scic_sds_unsolicited_frame_control_get_header(
&(scic_sds_phy_get_controller(sci_phy)->uf_control),
frame_index,
(void **)&frame_words);
if (result != SCI_SUCCESS)
return result;
sci_swab32_cpy(&iaf, frame_words, sizeof(iaf) / sizeof(u32));
if (iaf.frame_type == 0) {
u32 state;
memcpy(&iphy->frame_rcvd.iaf, &iaf, sizeof(iaf));
if (iaf.smp_tport) {
/* We got the IAF for an expander PHY go to the final
* state since there are no power requirements for
* expander phys.
*/
state = SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL;
} else {
/* We got the IAF we can now go to the await spinup
* semaphore state
*/
state = SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER;
}
sci_base_state_machine_change_state(
&sci_phy->starting_substate_machine,
state);
result = SCI_SUCCESS;
} else
dev_warn(sciphy_to_dev(sci_phy),
"%s: PHY starting substate machine received "
"unexpected frame id %x\n",
__func__,
frame_index);
scic_sds_controller_release_frame(scic_sds_phy_get_controller(sci_phy),
frame_index);
return result;
}
/**
*
* @phy: This is struct scic_sds_phy object which is being requested to decode the
* frame data.
* @frame_index: This is the index of the unsolicited frame which was received
* for this phy.
*
* This method decodes the unsolicited frame when the struct scic_sds_phy is in the
* SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF. - Get the UF Header - If
* the UF is an SIGNATURE FIS - Copy IAF data to local phy object SIGNATURE FIS
* data buffer. - else - log warning message of unexpected unsolicted frame -
* release frame buffer enum sci_status SCI_SUCCESS Must decode the SIGNATURE FIS
* data
*/
static enum sci_status scic_sds_phy_starting_substate_await_sig_fis_frame_handler(
struct scic_sds_phy *sci_phy,
u32 frame_index)
{
enum sci_status result;
struct dev_to_host_fis *frame_header;
u32 *fis_frame_data;
struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
result = scic_sds_unsolicited_frame_control_get_header(
&(scic_sds_phy_get_controller(sci_phy)->uf_control),
frame_index,
(void **)&frame_header);
if (result != SCI_SUCCESS)
return result;
if ((frame_header->fis_type == FIS_REGD2H) &&
!(frame_header->status & ATA_BUSY)) {
scic_sds_unsolicited_frame_control_get_buffer(
&(scic_sds_phy_get_controller(sci_phy)->uf_control),
frame_index,
(void **)&fis_frame_data);
scic_sds_controller_copy_sata_response(&iphy->frame_rcvd.fis,
frame_header,
fis_frame_data);
/* got IAF we can now go to the await spinup semaphore state */
sci_base_state_machine_change_state(&sci_phy->starting_substate_machine,
SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL);
result = SCI_SUCCESS;
} else
dev_warn(sciphy_to_dev(sci_phy),
"%s: PHY starting substate machine received "
"unexpected frame id %x\n",
__func__,
frame_index);
/* Regardless of the result we are done with this frame with it */
scic_sds_controller_release_frame(scic_sds_phy_get_controller(sci_phy),
frame_index);
return result;
}
/*
* *****************************************************************************
* * SCIC SDS PHY POWER_HANDLERS
* ***************************************************************************** */
/*
* This method is called by the struct scic_sds_controller when the phy object is
* granted power. - The notify enable spinups are turned on for this phy object
* - The phy state machine is transitioned to the
* SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_phy_starting_substate_await_sas_power_consume_power_handler(
struct scic_sds_phy *sci_phy)
{
u32 enable_spinup;
enable_spinup = readl(&sci_phy->link_layer_registers->notify_enable_spinup_control);
enable_spinup |= SCU_ENSPINUP_GEN_BIT(ENABLE);
writel(enable_spinup, &sci_phy->link_layer_registers->notify_enable_spinup_control);
/* Change state to the final state this substate machine has run to completion */
sci_base_state_machine_change_state(&sci_phy->starting_substate_machine,
SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL);
return SCI_SUCCESS;
}
/*
* This method is called by the struct scic_sds_controller when the phy object is
* granted power. - The phy state machine is transitioned to the
* SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN. enum sci_status SCI_SUCCESS
*/
static enum sci_status scic_sds_phy_starting_substate_await_sata_power_consume_power_handler(
struct scic_sds_phy *sci_phy)
{
u32 scu_sas_pcfg_value;
/* Release the spinup hold state and reset the OOB state machine */
scu_sas_pcfg_value =
readl(&sci_phy->link_layer_registers->phy_configuration);
scu_sas_pcfg_value &=
~(SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD) | SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE));
scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
writel(scu_sas_pcfg_value,
&sci_phy->link_layer_registers->phy_configuration);
/* Now restart the OOB operation */
scu_sas_pcfg_value &= ~SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
writel(scu_sas_pcfg_value,
&sci_phy->link_layer_registers->phy_configuration);
/* Change state to the final state this substate machine has run to completion */
sci_base_state_machine_change_state(&sci_phy->starting_substate_machine,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN);
return SCI_SUCCESS;
}
static enum sci_status default_phy_handler(struct scic_sds_phy *sci_phy,
const char *func)
{
dev_dbg(sciphy_to_dev(sci_phy),
"%s: in wrong state: %d\n", func,
sci_base_state_machine_get_state(&sci_phy->state_machine));
return SCI_FAILURE_INVALID_STATE;
}
static enum sci_status
scic_sds_phy_default_start_handler(struct scic_sds_phy *sci_phy)
{
return default_phy_handler(sci_phy, __func__);
}
static enum sci_status
scic_sds_phy_default_stop_handler(struct scic_sds_phy *sci_phy)
{
return default_phy_handler(sci_phy, __func__);
}
static enum sci_status
scic_sds_phy_default_reset_handler(struct scic_sds_phy *sci_phy)
{
return default_phy_handler(sci_phy, __func__);
}
static enum sci_status
scic_sds_phy_default_destroy_handler(struct scic_sds_phy *sci_phy)
{
return default_phy_handler(sci_phy, __func__);
}
static enum sci_status
scic_sds_phy_default_frame_handler(struct scic_sds_phy *sci_phy,
u32 frame_index)
{
struct scic_sds_controller *scic = scic_sds_phy_get_controller(sci_phy);
default_phy_handler(sci_phy, __func__);
scic_sds_controller_release_frame(scic, frame_index);
return SCI_FAILURE_INVALID_STATE;
}
static enum sci_status
scic_sds_phy_default_event_handler(struct scic_sds_phy *sci_phy,
u32 event_code)
{
return default_phy_handler(sci_phy, __func__);
}
static enum sci_status
scic_sds_phy_default_consume_power_handler(struct scic_sds_phy *sci_phy)
{
return default_phy_handler(sci_phy, __func__);
}
static const struct scic_sds_phy_state_handler scic_sds_phy_starting_substate_handler_table[] = {
[SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_starting_substate_general_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_default_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_starting_substate_general_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_starting_substate_await_ossp_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_starting_substate_general_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_starting_substate_await_sas_phy_speed_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_default_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_starting_substate_await_iaf_uf_frame_handler,
.event_handler = scic_sds_phy_starting_substate_await_iaf_uf_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_starting_substate_general_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_starting_substate_await_sas_power_event_handler,
.consume_power_handler = scic_sds_phy_starting_substate_await_sas_power_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_starting_substate_general_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_starting_substate_await_sata_power_event_handler,
.consume_power_handler = scic_sds_phy_starting_substate_await_sata_power_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_starting_substate_general_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_starting_substate_await_sata_phy_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_starting_substate_general_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_starting_substate_await_sata_speed_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_starting_substate_general_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_starting_substate_await_sig_fis_frame_handler,
.event_handler = scic_sds_phy_starting_substate_await_sig_fis_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_starting_substate_general_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_default_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
}
};
/**
* scic_sds_phy_set_starting_substate_handlers() -
*
* This macro sets the starting substate handlers by state_id
*/
#define scic_sds_phy_set_starting_substate_handlers(phy, state_id) \
scic_sds_phy_set_state_handlers(\
(phy), \
&scic_sds_phy_starting_substate_handler_table[(state_id)] \
)
/*
* ****************************************************************************
* * PHY STARTING SUBSTATE METHODS
* **************************************************************************** */
/**
* scic_sds_phy_starting_initial_substate_enter -
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL. - The initial state
* handlers are put in place for the struct scic_sds_phy object. - The state is
* changed to the wait phy type event notification. none
*/
static void scic_sds_phy_starting_initial_substate_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_starting_substate_handlers(
sci_phy, SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL);
/* This is just an temporary state go off to the starting state */
sci_base_state_machine_change_state(&sci_phy->starting_substate_machine,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_PHY_TYPE_EN. - Set the
* struct scic_sds_phy object state handlers for this state. none
*/
static void scic_sds_phy_starting_await_ossp_en_substate_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_starting_substate_handlers(
sci_phy, SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN
);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SPEED_EN. - Set the
* struct scic_sds_phy object state handlers for this state. none
*/
static void scic_sds_phy_starting_await_sas_speed_en_substate_enter(
void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_starting_substate_handlers(
sci_phy, SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN
);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF. - Set the
* struct scic_sds_phy object state handlers for this state. none
*/
static void scic_sds_phy_starting_await_iaf_uf_substate_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_starting_substate_handlers(
sci_phy, SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF
);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER. - Set the
* struct scic_sds_phy object state handlers for this state. - Add this phy object to
* the power control queue none
*/
static void scic_sds_phy_starting_await_sas_power_substate_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_starting_substate_handlers(
sci_phy, SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER
);
scic_sds_controller_power_control_queue_insert(
scic_sds_phy_get_controller(sci_phy),
sci_phy
);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on exiting
* the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER. - Remove the
* struct scic_sds_phy object from the power control queue. none
*/
static void scic_sds_phy_starting_await_sas_power_substate_exit(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_controller_power_control_queue_remove(
scic_sds_phy_get_controller(sci_phy), sci_phy
);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER. - Set the
* struct scic_sds_phy object state handlers for this state. - Add this phy object to
* the power control queue none
*/
static void scic_sds_phy_starting_await_sata_power_substate_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_starting_substate_handlers(
sci_phy, SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER
);
scic_sds_controller_power_control_queue_insert(
scic_sds_phy_get_controller(sci_phy),
sci_phy
);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on exiting
* the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER. - Remove the
* struct scic_sds_phy object from the power control queue. none
*/
static void scic_sds_phy_starting_await_sata_power_substate_exit(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_controller_power_control_queue_remove(
scic_sds_phy_get_controller(sci_phy),
sci_phy
);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This function will perform the actions required by the struct scic_sds_phy on
* entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN. - Set the
* struct scic_sds_phy object state handlers for this state. none
*/
static void scic_sds_phy_starting_await_sata_phy_substate_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_starting_substate_handlers(
sci_phy,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN);
isci_timer_start(sci_phy->sata_timeout_timer,
SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy
* on exiting
* the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN. - stop the timer
* that was started on entry to await sata phy event notification none
*/
static inline void scic_sds_phy_starting_await_sata_phy_substate_exit(
void *object)
{
struct scic_sds_phy *sci_phy = object;
isci_timer_stop(sci_phy->sata_timeout_timer);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN. - Set the
* struct scic_sds_phy object state handlers for this state. none
*/
static void scic_sds_phy_starting_await_sata_speed_substate_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_starting_substate_handlers(
sci_phy,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN);
isci_timer_start(sci_phy->sata_timeout_timer,
SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This function will perform the actions required by the
* struct scic_sds_phy on exiting
* the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN. - stop the timer
* that was started on entry to await sata phy event notification none
*/
static inline void scic_sds_phy_starting_await_sata_speed_substate_exit(
void *object)
{
struct scic_sds_phy *sci_phy = object;
isci_timer_stop(sci_phy->sata_timeout_timer);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This function will perform the actions required by the struct scic_sds_phy on
* entering the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF. - Set the
* struct scic_sds_phy object state handlers for this state.
* - Start the SIGNATURE FIS
* timeout timer none
*/
static void scic_sds_phy_starting_await_sig_fis_uf_substate_enter(void *object)
{
bool continue_to_ready_state;
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_starting_substate_handlers(
sci_phy,
SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF);
continue_to_ready_state = scic_sds_port_link_detected(
sci_phy->owning_port,
sci_phy);
if (continue_to_ready_state) {
/*
* Clear the PE suspend condition so we can actually
* receive SIG FIS
* The hardware will not respond to the XRDY until the PE
* suspend condition is cleared.
*/
scic_sds_phy_resume(sci_phy);
isci_timer_start(sci_phy->sata_timeout_timer,
SCIC_SDS_SIGNATURE_FIS_TIMEOUT);
} else
sci_phy->is_in_link_training = false;
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This function will perform the actions required by the
* struct scic_sds_phy on exiting
* the SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF. - Stop the SIGNATURE
* FIS timeout timer. none
*/
static inline void scic_sds_phy_starting_await_sig_fis_uf_substate_exit(
void *object)
{
struct scic_sds_phy *sci_phy = object;
isci_timer_stop(sci_phy->sata_timeout_timer);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL. - Set the struct scic_sds_phy
* object state handlers for this state. - Change base state machine to the
* ready state. none
*/
static void scic_sds_phy_starting_final_substate_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_starting_substate_handlers(sci_phy,
SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL);
/* State machine has run to completion so exit out and change
* the base state machine to the ready state
*/
sci_base_state_machine_change_state(&sci_phy->state_machine,
SCI_BASE_PHY_STATE_READY);
}
/* --------------------------------------------------------------------------- */
static const struct sci_base_state scic_sds_phy_starting_substates[] = {
[SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL] = {
.enter_state = scic_sds_phy_starting_initial_substate_enter,
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN] = {
.enter_state = scic_sds_phy_starting_await_ossp_en_substate_enter,
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN] = {
.enter_state = scic_sds_phy_starting_await_sas_speed_en_substate_enter,
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF] = {
.enter_state = scic_sds_phy_starting_await_iaf_uf_substate_enter,
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER] = {
.enter_state = scic_sds_phy_starting_await_sas_power_substate_enter,
.exit_state = scic_sds_phy_starting_await_sas_power_substate_exit,
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER] = {
.enter_state = scic_sds_phy_starting_await_sata_power_substate_enter,
.exit_state = scic_sds_phy_starting_await_sata_power_substate_exit
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN] = {
.enter_state = scic_sds_phy_starting_await_sata_phy_substate_enter,
.exit_state = scic_sds_phy_starting_await_sata_phy_substate_exit
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN] = {
.enter_state = scic_sds_phy_starting_await_sata_speed_substate_enter,
.exit_state = scic_sds_phy_starting_await_sata_speed_substate_exit
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF] = {
.enter_state = scic_sds_phy_starting_await_sig_fis_uf_substate_enter,
.exit_state = scic_sds_phy_starting_await_sig_fis_uf_substate_exit
},
[SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL] = {
.enter_state = scic_sds_phy_starting_final_substate_enter,
}
};
/*
* This method takes the struct scic_sds_phy from a stopped state and
* attempts to start it. - The phy state machine is transitioned to the
* SCI_BASE_PHY_STATE_STARTING. enum sci_status SCI_SUCCESS
*/
static enum sci_status
scic_sds_phy_stopped_state_start_handler(struct scic_sds_phy *sci_phy)
{
struct isci_host *ihost;
struct scic_sds_controller *scic;
scic = scic_sds_phy_get_controller(sci_phy),
ihost = scic_to_ihost(scic);
/* Create the SIGNATURE FIS Timeout timer for this phy */
sci_phy->sata_timeout_timer = isci_timer_create(ihost, sci_phy,
scic_sds_phy_sata_timeout);
if (sci_phy->sata_timeout_timer)
sci_base_state_machine_change_state(&sci_phy->state_machine,
SCI_BASE_PHY_STATE_STARTING);
return SCI_SUCCESS;
}
static enum sci_status
scic_sds_phy_stopped_state_destroy_handler(struct scic_sds_phy *sci_phy)
{
return SCI_SUCCESS;
}
static enum sci_status
scic_sds_phy_ready_state_stop_handler(struct scic_sds_phy *sci_phy)
{
sci_base_state_machine_change_state(&sci_phy->state_machine,
SCI_BASE_PHY_STATE_STOPPED);
return SCI_SUCCESS;
}
static enum sci_status
scic_sds_phy_ready_state_reset_handler(struct scic_sds_phy *sci_phy)
{
sci_base_state_machine_change_state(&sci_phy->state_machine,
SCI_BASE_PHY_STATE_RESETTING);
return SCI_SUCCESS;
}
/**
* scic_sds_phy_ready_state_event_handler -
* @phy: This is the struct scic_sds_phy object which has received the event.
*
* This method request the struct scic_sds_phy handle the received event. The only
* event that we are interested in while in the ready state is the link failure
* event. - decoded event is a link failure - transition the struct scic_sds_phy back
* to the SCI_BASE_PHY_STATE_STARTING state. - any other event received will
* report a warning message enum sci_status SCI_SUCCESS if the event received is a
* link failure SCI_FAILURE_INVALID_STATE for any other event received.
*/
static enum sci_status scic_sds_phy_ready_state_event_handler(struct scic_sds_phy *sci_phy,
u32 event_code)
{
enum sci_status result = SCI_FAILURE;
switch (scu_get_event_code(event_code)) {
case SCU_EVENT_LINK_FAILURE:
/* Link failure change state back to the starting state */
sci_base_state_machine_change_state(&sci_phy->state_machine,
SCI_BASE_PHY_STATE_STARTING);
result = SCI_SUCCESS;
break;
case SCU_EVENT_BROADCAST_CHANGE:
/* Broadcast change received. Notify the port. */
if (scic_sds_phy_get_port(sci_phy) != NULL)
scic_sds_port_broadcast_change_received(sci_phy->owning_port, sci_phy);
else
sci_phy->bcn_received_while_port_unassigned = true;
break;
default:
dev_warn(sciphy_to_dev(sci_phy),
"%sP SCIC PHY 0x%p ready state machine received "
"unexpected event_code %x\n",
__func__, sci_phy, event_code);
result = SCI_FAILURE_INVALID_STATE;
break;
}
return result;
}
static enum sci_status scic_sds_phy_resetting_state_event_handler(struct scic_sds_phy *sci_phy,
u32 event_code)
{
enum sci_status result = SCI_FAILURE;
switch (scu_get_event_code(event_code)) {
case SCU_EVENT_HARD_RESET_TRANSMITTED:
/* Link failure change state back to the starting state */
sci_base_state_machine_change_state(&sci_phy->state_machine,
SCI_BASE_PHY_STATE_STARTING);
result = SCI_SUCCESS;
break;
default:
dev_warn(sciphy_to_dev(sci_phy),
"%s: SCIC PHY 0x%p resetting state machine received "
"unexpected event_code %x\n",
__func__, sci_phy, event_code);
result = SCI_FAILURE_INVALID_STATE;
break;
}
return result;
}
/* --------------------------------------------------------------------------- */
static const struct scic_sds_phy_state_handler scic_sds_phy_state_handler_table[] = {
[SCI_BASE_PHY_STATE_INITIAL] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_default_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_default_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCI_BASE_PHY_STATE_STOPPED] = {
.start_handler = scic_sds_phy_stopped_state_start_handler,
.stop_handler = scic_sds_phy_default_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_stopped_state_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_default_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCI_BASE_PHY_STATE_STARTING] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_default_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_default_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCI_BASE_PHY_STATE_READY] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_ready_state_stop_handler,
.reset_handler = scic_sds_phy_ready_state_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_ready_state_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCI_BASE_PHY_STATE_RESETTING] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_default_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_resetting_state_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
},
[SCI_BASE_PHY_STATE_FINAL] = {
.start_handler = scic_sds_phy_default_start_handler,
.stop_handler = scic_sds_phy_default_stop_handler,
.reset_handler = scic_sds_phy_default_reset_handler,
.destruct_handler = scic_sds_phy_default_destroy_handler,
.frame_handler = scic_sds_phy_default_frame_handler,
.event_handler = scic_sds_phy_default_event_handler,
.consume_power_handler = scic_sds_phy_default_consume_power_handler
}
};
/*
* ****************************************************************************
* * PHY STATE PRIVATE METHODS
* **************************************************************************** */
/**
*
* @sci_phy: This is the struct scic_sds_phy object to stop.
*
* This method will stop the struct scic_sds_phy object. This does not reset the
* protocol engine it just suspends it and places it in a state where it will
* not cause the end device to power up. none
*/
static void scu_link_layer_stop_protocol_engine(
struct scic_sds_phy *sci_phy)
{
u32 scu_sas_pcfg_value;
u32 enable_spinup_value;
/* Suspend the protocol engine and place it in a sata spinup hold state */
scu_sas_pcfg_value =
readl(&sci_phy->link_layer_registers->phy_configuration);
scu_sas_pcfg_value |=
(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) |
SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE) |
SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD));
writel(scu_sas_pcfg_value,
&sci_phy->link_layer_registers->phy_configuration);
/* Disable the notify enable spinup primitives */
enable_spinup_value = readl(&sci_phy->link_layer_registers->notify_enable_spinup_control);
enable_spinup_value &= ~SCU_ENSPINUP_GEN_BIT(ENABLE);
writel(enable_spinup_value, &sci_phy->link_layer_registers->notify_enable_spinup_control);
}
/**
*
*
* This method will start the OOB/SN state machine for this struct scic_sds_phy object.
*/
static void scu_link_layer_start_oob(
struct scic_sds_phy *sci_phy)
{
u32 scu_sas_pcfg_value;
scu_sas_pcfg_value =
readl(&sci_phy->link_layer_registers->phy_configuration);
scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
scu_sas_pcfg_value &=
~(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) |
SCU_SAS_PCFG_GEN_BIT(HARD_RESET));
writel(scu_sas_pcfg_value,
&sci_phy->link_layer_registers->phy_configuration);
}
/**
*
*
* This method will transmit a hard reset request on the specified phy. The SCU
* hardware requires that we reset the OOB state machine and set the hard reset
* bit in the phy configuration register. We then must start OOB over with the
* hard reset bit set.
*/
static void scu_link_layer_tx_hard_reset(
struct scic_sds_phy *sci_phy)
{
u32 phy_configuration_value;
/*
* SAS Phys must wait for the HARD_RESET_TX event notification to transition
* to the starting state. */
phy_configuration_value =
readl(&sci_phy->link_layer_registers->phy_configuration);
phy_configuration_value |=
(SCU_SAS_PCFG_GEN_BIT(HARD_RESET) |
SCU_SAS_PCFG_GEN_BIT(OOB_RESET));
writel(phy_configuration_value,
&sci_phy->link_layer_registers->phy_configuration);
/* Now take the OOB state machine out of reset */
phy_configuration_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
phy_configuration_value &= ~SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
writel(phy_configuration_value,
&sci_phy->link_layer_registers->phy_configuration);
}
/*
* ****************************************************************************
* * PHY BASE STATE METHODS
* **************************************************************************** */
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCI_BASE_PHY_STATE_INITIAL. - This function sets the state
* handlers for the phy object base state machine initial state. none
*/
static void scic_sds_phy_initial_state_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_base_state_handlers(sci_phy, SCI_BASE_PHY_STATE_INITIAL);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This function will perform the actions required by the struct scic_sds_phy on
* entering the SCI_BASE_PHY_STATE_INITIAL. - This function sets the state
* handlers for the phy object base state machine initial state. - The SCU
* hardware is requested to stop the protocol engine. none
*/
static void scic_sds_phy_stopped_state_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
struct scic_sds_controller *scic = scic_sds_phy_get_controller(sci_phy);
struct isci_host *ihost = scic_to_ihost(scic);
/*
* @todo We need to get to the controller to place this PE in a
* reset state
*/
scic_sds_phy_set_base_state_handlers(sci_phy,
SCI_BASE_PHY_STATE_STOPPED);
if (sci_phy->sata_timeout_timer != NULL) {
isci_del_timer(ihost, sci_phy->sata_timeout_timer);
sci_phy->sata_timeout_timer = NULL;
}
scu_link_layer_stop_protocol_engine(sci_phy);
if (sci_phy->state_machine.previous_state_id !=
SCI_BASE_PHY_STATE_INITIAL)
scic_sds_controller_link_down(
scic_sds_phy_get_controller(sci_phy),
scic_sds_phy_get_port(sci_phy),
sci_phy);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCI_BASE_PHY_STATE_STARTING. - This function sets the state
* handlers for the phy object base state machine starting state. - The SCU
* hardware is requested to start OOB/SN on this protocl engine. - The phy
* starting substate machine is started. - If the previous state was the ready
* state then the struct scic_sds_controller is informed that the phy has gone link
* down. none
*/
static void scic_sds_phy_starting_state_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_base_state_handlers(sci_phy, SCI_BASE_PHY_STATE_STARTING);
scu_link_layer_stop_protocol_engine(sci_phy);
scu_link_layer_start_oob(sci_phy);
/* We don't know what kind of phy we are going to be just yet */
sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_UNKNOWN;
sci_phy->bcn_received_while_port_unassigned = false;
/* Change over to the starting substate machine to continue */
sci_base_state_machine_start(&sci_phy->starting_substate_machine);
if (sci_phy->state_machine.previous_state_id
== SCI_BASE_PHY_STATE_READY) {
scic_sds_controller_link_down(
scic_sds_phy_get_controller(sci_phy),
scic_sds_phy_get_port(sci_phy),
sci_phy
);
}
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCI_BASE_PHY_STATE_READY. - This function sets the state
* handlers for the phy object base state machine ready state. - The SCU
* hardware protocol engine is resumed. - The struct scic_sds_controller is informed
* that the phy object has gone link up. none
*/
static void scic_sds_phy_ready_state_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_base_state_handlers(sci_phy, SCI_BASE_PHY_STATE_READY);
scic_sds_controller_link_up(
scic_sds_phy_get_controller(sci_phy),
scic_sds_phy_get_port(sci_phy),
sci_phy
);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on exiting
* the SCI_BASE_PHY_STATE_INITIAL. This function suspends the SCU hardware
* protocol engine represented by this struct scic_sds_phy object. none
*/
static void scic_sds_phy_ready_state_exit(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_suspend(sci_phy);
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCI_BASE_PHY_STATE_RESETTING. - This function sets the state
* handlers for the phy object base state machine resetting state. none
*/
static void scic_sds_phy_resetting_state_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_base_state_handlers(sci_phy, SCI_BASE_PHY_STATE_RESETTING);
/*
* The phy is being reset, therefore deactivate it from the port.
* In the resetting state we don't notify the user regarding
* link up and link down notifications. */
scic_sds_port_deactivate_phy(sci_phy->owning_port, sci_phy, false);
if (sci_phy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) {
scu_link_layer_tx_hard_reset(sci_phy);
} else {
/*
* The SCU does not need to have a discrete reset state so
* just go back to the starting state.
*/
sci_base_state_machine_change_state(
&sci_phy->state_machine,
SCI_BASE_PHY_STATE_STARTING);
}
}
/**
*
* @object: This is the object which is cast to a struct scic_sds_phy object.
*
* This method will perform the actions required by the struct scic_sds_phy on
* entering the SCI_BASE_PHY_STATE_FINAL. - This function sets the state
* handlers for the phy object base state machine final state. none
*/
static void scic_sds_phy_final_state_enter(void *object)
{
struct scic_sds_phy *sci_phy = object;
scic_sds_phy_set_base_state_handlers(sci_phy, SCI_BASE_PHY_STATE_FINAL);
/* Nothing to do here */
}
/* --------------------------------------------------------------------------- */
static const struct sci_base_state scic_sds_phy_state_table[] = {
[SCI_BASE_PHY_STATE_INITIAL] = {
.enter_state = scic_sds_phy_initial_state_enter,
},
[SCI_BASE_PHY_STATE_STOPPED] = {
.enter_state = scic_sds_phy_stopped_state_enter,
},
[SCI_BASE_PHY_STATE_STARTING] = {
.enter_state = scic_sds_phy_starting_state_enter,
},
[SCI_BASE_PHY_STATE_READY] = {
.enter_state = scic_sds_phy_ready_state_enter,
.exit_state = scic_sds_phy_ready_state_exit,
},
[SCI_BASE_PHY_STATE_RESETTING] = {
.enter_state = scic_sds_phy_resetting_state_enter,
},
[SCI_BASE_PHY_STATE_FINAL] = {
.enter_state = scic_sds_phy_final_state_enter,
},
};
void scic_sds_phy_construct(struct scic_sds_phy *sci_phy,
struct scic_sds_port *owning_port, u8 phy_index)
{
sci_base_state_machine_construct(&sci_phy->state_machine,
sci_phy,
scic_sds_phy_state_table,
SCI_BASE_PHY_STATE_INITIAL);
sci_base_state_machine_start(&sci_phy->state_machine);
/* Copy the rest of the input data to our locals */
sci_phy->owning_port = owning_port;
sci_phy->phy_index = phy_index;
sci_phy->bcn_received_while_port_unassigned = false;
sci_phy->protocol = SCIC_SDS_PHY_PROTOCOL_UNKNOWN;
sci_phy->link_layer_registers = NULL;
sci_phy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN;
sci_phy->sata_timeout_timer = NULL;
/* Initialize the the substate machines */
sci_base_state_machine_construct(&sci_phy->starting_substate_machine,
sci_phy,
scic_sds_phy_starting_substates,
SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL);
}
void isci_phy_init(struct isci_phy *iphy, struct isci_host *ihost, int index)
{
union scic_oem_parameters oem;
u64 sci_sas_addr;
__be64 sas_addr;
scic_oem_parameters_get(&ihost->sci, &oem);
sci_sas_addr = oem.sds1.phys[index].sas_address.high;
sci_sas_addr <<= 32;
sci_sas_addr |= oem.sds1.phys[index].sas_address.low;
sas_addr = cpu_to_be64(sci_sas_addr);
memcpy(iphy->sas_addr, &sas_addr, sizeof(sas_addr));
iphy->isci_port = NULL;
iphy->sas_phy.enabled = 0;
iphy->sas_phy.id = index;
iphy->sas_phy.sas_addr = &iphy->sas_addr[0];
iphy->sas_phy.frame_rcvd = (u8 *)&iphy->frame_rcvd;
iphy->sas_phy.ha = &ihost->sas_ha;
iphy->sas_phy.lldd_phy = iphy;
iphy->sas_phy.enabled = 1;
iphy->sas_phy.class = SAS;
iphy->sas_phy.iproto = SAS_PROTOCOL_ALL;
iphy->sas_phy.tproto = 0;
iphy->sas_phy.type = PHY_TYPE_PHYSICAL;
iphy->sas_phy.role = PHY_ROLE_INITIATOR;
iphy->sas_phy.oob_mode = OOB_NOT_CONNECTED;
iphy->sas_phy.linkrate = SAS_LINK_RATE_UNKNOWN;
memset(&iphy->frame_rcvd, 0, sizeof(iphy->frame_rcvd));
}
/**
* isci_phy_control() - This function is one of the SAS Domain Template
* functions. This is a phy management function.
* @phy: This parameter specifies the sphy being controlled.
* @func: This parameter specifies the phy control function being invoked.
* @buf: This parameter is specific to the phy function being invoked.
*
* status, zero indicates success.
*/
int isci_phy_control(struct asd_sas_phy *sas_phy,
enum phy_func func,
void *buf)
{
int ret = 0;
struct isci_phy *iphy = sas_phy->lldd_phy;
struct isci_port *iport = iphy->isci_port;
struct isci_host *ihost = sas_phy->ha->lldd_ha;
unsigned long flags;
dev_dbg(&ihost->pdev->dev,
"%s: phy %p; func %d; buf %p; isci phy %p, port %p\n",
__func__, sas_phy, func, buf, iphy, iport);
switch (func) {
case PHY_FUNC_DISABLE:
spin_lock_irqsave(&ihost->scic_lock, flags);
scic_sds_phy_stop(&iphy->sci);
spin_unlock_irqrestore(&ihost->scic_lock, flags);
break;
case PHY_FUNC_LINK_RESET:
spin_lock_irqsave(&ihost->scic_lock, flags);
scic_sds_phy_stop(&iphy->sci);
scic_sds_phy_start(&iphy->sci);
spin_unlock_irqrestore(&ihost->scic_lock, flags);
break;
case PHY_FUNC_HARD_RESET:
if (!iport)
return -ENODEV;
/* Perform the port reset. */
ret = isci_port_perform_hard_reset(ihost, iport, iphy);
break;
default:
dev_dbg(&ihost->pdev->dev,
"%s: phy %p; func %d NOT IMPLEMENTED!\n",
__func__, sas_phy, func);
ret = -ENOSYS;
break;
}
return ret;
}
