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4a33c525f0e94b57602abd1e43644cbf6f5418f4
android_kernel_xiaomi_sm8450/drivers/scsi/isci/phy.c
Adam Gruchala 4a33c525f0 isci: merge phy substates 
Merged states and substates into one state machine, as we always
unconditionally transitioned to the substate machine it was straightforward to
enter that substate from the starting state.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Adam Gruchala <adam.gruchala@intel.com>
[fixed construction, starting_state_enter, and starting check]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2011-07-03 04:04:48 -07:00

2325 lines
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/*
* 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 "timers.h"
#include "probe_roms.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_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->state_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->state_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->state_machine,
next_state);
}
static void scic_sds_phy_restart_starting_state(
struct scic_sds_phy *sci_phy)
{
/* 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_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->state_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->state_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->state_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->state_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->state_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->state_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__);
}
/*
* 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
},
[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
},
[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 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_base_state_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->state_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_base_state_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_base_state_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_base_state_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_base_state_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_base_state_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_base_state_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_base_state_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_base_state_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_base_state_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);
}
/*
* ****************************************************************************
* * 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;
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
);
}
sci_base_state_machine_change_state(&sci_phy->state_machine,
SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL);
}
/**
*
* @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,
},
[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,
},
[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;
}
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;
}
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