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isci: unify port reset, add_phy, and remove_phy handlers

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Unify the implementations and remove the state handlers.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Piotr Sawicki <piotr.sawicki@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Piotr Sawicki 2011-05-12 19:10:03 +00:00 committed by Dan Williams
parent e6ec5afde9
commit bd6713b416
2 changed files with 163 additions and 327 deletions
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471
drivers/scsi/isci/port.c
View File

@ -531,40 +531,6 @@ static enum sci_status scic_sds_port_clear_phy(
return SCI_FAILURE;
}
/**
* scic_sds_port_add_phy() -
* @sci_port: This parameter specifies the port in which the phy will be added.
* @sci_phy: This parameter is the phy which is to be added to the port.
*
* This method will add a PHY to the selected port. This method returns an
* enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other status
* is failre to add the phy to the port.
*/
enum sci_status scic_sds_port_add_phy(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
return sci_port->state_handlers->add_phy_handler(
sci_port, sci_phy);
}
/**
* scic_sds_port_remove_phy() -
* @sci_port: This parameter specifies the port in which the phy will be added.
* @sci_phy: This parameter is the phy which is to be added to the port.
*
* This method will remove the PHY from the selected PORT. This method returns
* an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any other
* status is failre to add the phy to the port.
*/
enum sci_status scic_sds_port_remove_phy(
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
return sci_port->state_handlers->remove_phy_handler(
sci_port, sci_phy);
}
/**
* This method requests the SAS address for the supplied SAS port from the SCI
@ -745,23 +711,6 @@ enum sci_status scic_sds_port_initialize(
return SCI_SUCCESS;
}
/**
* scic_port_hard_reset() - perform port hard reset
* @port: a handle corresponding to the SAS port to be hard reset.
* @reset_timeout: This parameter specifies the number of milliseconds in which
* the port reset operation should complete.
*
* The SCI User callback in scic_user_callbacks_t will only be called once for
* each phy in the SAS Port at completion of the hard reset sequence. Return a
* status indicating whether the hard reset started successfully. SCI_SUCCESS
* This value is returned if the hard reset operation started successfully.
*/
static enum sci_status scic_port_hard_reset(struct scic_sds_port *port,
u32 reset_timeout)
{
return port->state_handlers->reset_handler(
port, reset_timeout);
}
/**
* This method assigns the direct attached device ID for this port.
@ -1186,48 +1135,6 @@ static enum sci_status scic_sds_port_ready_substate_complete_io_handler(
return SCI_SUCCESS;
}
static enum sci_status scic_sds_port_ready_substate_add_phy_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
enum sci_status status;
status = scic_sds_port_set_phy(sci_port, sci_phy);
if (status != SCI_SUCCESS)
return status;
scic_sds_port_general_link_up_handler(sci_port, sci_phy, true);
sci_port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
port_state_machine_change(sci_port, SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
return status;
}
static enum sci_status scic_sds_port_ready_substate_remove_phy_handler(struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
enum sci_status status;
status = scic_sds_port_clear_phy(port, phy);
if (status != SCI_SUCCESS)
return status;
scic_sds_port_deactivate_phy(port, phy, true);
port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
port_state_machine_change(port,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
return status;
}
/*
* ****************************************************************************
* * READY SUBSTATE WAITING HANDLERS
* **************************************************************************** */
/**
*
* @sci_port: This is the struct scic_sds_port object that which has a phy that has
@ -1264,57 +1171,6 @@ static enum sci_status scic_sds_port_ready_waiting_substate_start_io_handler(
return SCI_FAILURE_INVALID_STATE;
}
/*
* ****************************************************************************
* * READY SUBSTATE OPERATIONAL HANDLERS
* **************************************************************************** */
/*
* This method will casue the port to reset. enum sci_status SCI_SUCCESS
*/
static enum
sci_status scic_sds_port_ready_operational_substate_reset_handler(
struct scic_sds_port *port,
u32 timeout)
{
enum sci_status status = SCI_FAILURE_INVALID_PHY;
u32 phy_index;
struct scic_sds_phy *selected_phy = NULL;
/* Select a phy on which we can send the hard reset request. */
for (phy_index = 0;
(phy_index < SCI_MAX_PHYS) && (selected_phy == NULL);
phy_index++) {
selected_phy = port->phy_table[phy_index];
if ((selected_phy != NULL) &&
!scic_sds_port_active_phy(port, selected_phy)) {
/*
* We found a phy but it is not ready select
* different phy
*/
selected_phy = NULL;
}
}
/* If we have a phy then go ahead and start the reset procedure */
if (selected_phy != NULL) {
status = scic_sds_phy_reset(selected_phy);
if (status == SCI_SUCCESS) {
isci_timer_start(port->timer_handle, timeout);
port->not_ready_reason =
SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED;
port_state_machine_change(port,
SCI_BASE_PORT_STATE_RESETTING);
}
}
return status;
}
/**
* scic_sds_port_ready_operational_substate_link_up_handler() -
* @sci_port: This is the struct scic_sds_port object that which has a phy that has
@ -1372,61 +1228,6 @@ static enum sci_status scic_sds_port_ready_operational_substate_start_io_handler
return SCI_SUCCESS;
}
/*
* ****************************************************************************
* * READY SUBSTATE OPERATIONAL HANDLERS
* **************************************************************************** */
/*
* This is the default method for a port add phy request. It will report a
* warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE
*/
static enum sci_status scic_sds_port_ready_configuring_substate_add_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
enum sci_status status;
status = scic_sds_port_set_phy(port, phy);
if (status == SCI_SUCCESS) {
scic_sds_port_general_link_up_handler(port, phy, true);
/*
* Re-enter the configuring state since this may be the last phy in
* the port. */
port_state_machine_change(port,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
}
return status;
}
/*
* This is the default method for a port remove phy request. It will report a
* warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE
*/
static enum sci_status scic_sds_port_ready_configuring_substate_remove_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
enum sci_status status;
status = scic_sds_port_clear_phy(port, phy);
if (status != SCI_SUCCESS)
return status;
scic_sds_port_deactivate_phy(port, phy, true);
/* Re-enter the configuring state since this may be the last phy in
* the port
*/
port_state_machine_change(port,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
return status;
}
/**
* scic_sds_port_ready_configuring_substate_complete_io_handler() -
* @port: This is the port that is being requested to complete the io request.
@ -1461,27 +1262,6 @@ static enum sci_status default_port_handler(struct scic_sds_port *sci_port,
return SCI_FAILURE_INVALID_STATE;
}
static enum sci_status
scic_sds_port_default_reset_handler(struct scic_sds_port *sci_port,
u32 timeout)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status
scic_sds_port_default_add_phy_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *base_phy)
{
return default_port_handler(sci_port, __func__);
}
static enum sci_status
scic_sds_port_default_remove_phy_handler(struct scic_sds_port *sci_port,
struct scic_sds_phy *base_phy)
{
return default_port_handler(sci_port, __func__);
}
/*
* This is the default method for a port unsolicited frame request. It will
* report a warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE Is it even
@ -1817,70 +1597,6 @@ static enum sci_status scic_sds_port_general_complete_io_handler(
return SCI_SUCCESS;
}
/*
* This method takes the struct scic_sds_port that is in a stopped state and handles
* the add phy request. In MPC mode the only time a phy can be added to a port
* is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status
* SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not
* be added to the port. SCI_SUCCESS if the phy is added to the port.
*/
static enum sci_status scic_sds_port_stopped_state_add_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
struct sci_sas_address port_sas_address;
/* Read the port assigned SAS Address if there is one */
scic_sds_port_get_sas_address(port, &port_sas_address);
if (port_sas_address.high != 0 && port_sas_address.low != 0) {
struct sci_sas_address phy_sas_address;
/*
* Make sure that the PHY SAS Address matches the SAS Address
* for this port. */
scic_sds_phy_get_sas_address(phy, &phy_sas_address);
if (
(port_sas_address.high != phy_sas_address.high)
|| (port_sas_address.low != phy_sas_address.low)
) {
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
}
return scic_sds_port_set_phy(port, phy);
}
/*
* This method takes the struct scic_sds_port that is in a stopped state and handles
* the remove phy request. In MPC mode the only time a phy can be removed from
* a port is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status
* SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not
* be added to the port. SCI_SUCCESS if the phy is added to the port.
*/
static enum sci_status scic_sds_port_stopped_state_remove_phy_handler(
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
return scic_sds_port_clear_phy(port, phy);
}
/*
* ****************************************************************************
* * READY STATE HANDLERS
* **************************************************************************** */
/*
* ****************************************************************************
* * RESETTING STATE HANDLERS
* **************************************************************************** */
/*
* ****************************************************************************
* * STOPPING STATE HANDLERS
* **************************************************************************** */
/*
* This method takes the struct scic_sds_port that is in a stopping state and handles
* the complete io request. Should the request count reach 0 then the port
@ -2044,11 +1760,171 @@ enum sci_status scic_sds_port_stop(struct scic_sds_port *sci_port)
}
}
static enum sci_status scic_port_hard_reset(struct scic_sds_port *sci_port, u32 timeout)
{
enum sci_status status = SCI_FAILURE_INVALID_PHY;
struct scic_sds_phy *selected_phy = NULL;
enum scic_sds_port_states state;
u32 phy_index;
state = sci_port->state_machine.current_state_id;
if (state != SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL) {
dev_warn(sciport_to_dev(sci_port),
"%s: in wrong state: %d\n", __func__, state);
return SCI_FAILURE_INVALID_STATE;
}
/* Select a phy on which we can send the hard reset request. */
for (phy_index = 0; phy_index < SCI_MAX_PHYS && !selected_phy; phy_index++) {
selected_phy = sci_port->phy_table[phy_index];
if (selected_phy &&
!scic_sds_port_active_phy(sci_port, selected_phy)) {
/*
* We found a phy but it is not ready select
* different phy
*/
selected_phy = NULL;
}
}
/* If we have a phy then go ahead and start the reset procedure */
if (!selected_phy)
return status;
status = scic_sds_phy_reset(selected_phy);
if (status != SCI_SUCCESS)
return status;
isci_timer_start(sci_port->timer_handle, timeout);
sci_port->not_ready_reason = SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED;
port_state_machine_change(sci_port,
SCI_BASE_PORT_STATE_RESETTING);
return SCI_SUCCESS;
}
/**
* scic_sds_port_add_phy() -
* @sci_port: This parameter specifies the port in which the phy will be added.
* @sci_phy: This parameter is the phy which is to be added to the port.
*
* This method will add a PHY to the selected port. This method returns an
* enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other
* status is a failure to add the phy to the port.
*/
enum sci_status scic_sds_port_add_phy(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
enum sci_status status;
enum scic_sds_port_states state;
state = sci_port->state_machine.current_state_id;
switch (state) {
case SCI_BASE_PORT_STATE_STOPPED: {
struct sci_sas_address port_sas_address;
/* Read the port assigned SAS Address if there is one */
scic_sds_port_get_sas_address(sci_port, &port_sas_address);
if (port_sas_address.high != 0 && port_sas_address.low != 0) {
struct sci_sas_address phy_sas_address;
/* Make sure that the PHY SAS Address matches the SAS Address
* for this port
*/
scic_sds_phy_get_sas_address(sci_phy, &phy_sas_address);
if (port_sas_address.high != phy_sas_address.high ||
port_sas_address.low != phy_sas_address.low)
return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION;
}
return scic_sds_port_set_phy(sci_port, sci_phy);
}
case SCIC_SDS_PORT_READY_SUBSTATE_WAITING:
case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL:
status = scic_sds_port_set_phy(sci_port, sci_phy);
if (status != SCI_SUCCESS)
return status;
scic_sds_port_general_link_up_handler(sci_port, sci_phy, true);
sci_port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
port_state_machine_change(sci_port, SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
return status;
case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING:
status = scic_sds_port_set_phy(sci_port, sci_phy);
if (status != SCI_SUCCESS)
return status;
scic_sds_port_general_link_up_handler(sci_port, sci_phy, true);
/* Re-enter the configuring state since this may be the last phy in
* the port.
*/
port_state_machine_change(sci_port,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
return SCI_SUCCESS;
default:
dev_warn(sciport_to_dev(sci_port),
"%s: in wrong state: %d\n", __func__, state);
return SCI_FAILURE_INVALID_STATE;
}
}
/**
* scic_sds_port_remove_phy() -
* @sci_port: This parameter specifies the port in which the phy will be added.
* @sci_phy: This parameter is the phy which is to be added to the port.
*
* This method will remove the PHY from the selected PORT. This method returns
* an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any
* other status is a failure to add the phy to the port.
*/
enum sci_status scic_sds_port_remove_phy(struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
enum sci_status status;
enum scic_sds_port_states state;
state = sci_port->state_machine.current_state_id;
switch (state) {
case SCI_BASE_PORT_STATE_STOPPED:
return scic_sds_port_clear_phy(sci_port, sci_phy);
case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL:
status = scic_sds_port_clear_phy(sci_port, sci_phy);
if (status != SCI_SUCCESS)
return status;
scic_sds_port_deactivate_phy(sci_port, sci_phy, true);
sci_port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING;
port_state_machine_change(sci_port,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
return SCI_SUCCESS;
case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING:
status = scic_sds_port_clear_phy(sci_port, sci_phy);
if (status != SCI_SUCCESS)
return status;
scic_sds_port_deactivate_phy(sci_port, sci_phy, true);
/* Re-enter the configuring state since this may be the last phy in
* the port
*/
port_state_machine_change(sci_port,
SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING);
return SCI_SUCCESS;
default:
dev_warn(sciport_to_dev(sci_port),
"%s: in wrong state: %d\n", __func__, state);
return SCI_FAILURE_INVALID_STATE;
}
}
static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] = {
[SCI_BASE_PORT_STATE_STOPPED] = {
.reset_handler = scic_sds_port_default_reset_handler,
.add_phy_handler = scic_sds_port_stopped_state_add_phy_handler,
.remove_phy_handler = scic_sds_port_stopped_state_remove_phy_handler,
.frame_handler = scic_sds_port_default_frame_handler,
.event_handler = scic_sds_port_default_event_handler,
.link_up_handler = scic_sds_port_default_link_up_handler,
@ -2057,9 +1933,6 @@ static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] =
.complete_io_handler = scic_sds_port_default_complete_io_handler
},
[SCI_BASE_PORT_STATE_STOPPING] = {
.reset_handler = scic_sds_port_default_reset_handler,
.add_phy_handler = scic_sds_port_default_add_phy_handler,
.remove_phy_handler = scic_sds_port_default_remove_phy_handler,
.frame_handler = scic_sds_port_default_frame_handler,
.event_handler = scic_sds_port_default_event_handler,
.link_up_handler = scic_sds_port_default_link_up_handler,
@ -2068,9 +1941,6 @@ static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] =
.complete_io_handler = scic_sds_port_stopping_state_complete_io_handler
},
[SCI_BASE_PORT_STATE_READY] = {
.reset_handler = scic_sds_port_default_reset_handler,
.add_phy_handler = scic_sds_port_default_add_phy_handler,
.remove_phy_handler = scic_sds_port_default_remove_phy_handler,
.frame_handler = scic_sds_port_default_frame_handler,
.event_handler = scic_sds_port_default_event_handler,
.link_up_handler = scic_sds_port_default_link_up_handler,
@ -2079,9 +1949,6 @@ static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] =
.complete_io_handler = scic_sds_port_general_complete_io_handler
},
[SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = {
.reset_handler = scic_sds_port_default_reset_handler,
.add_phy_handler = scic_sds_port_ready_substate_add_phy_handler,
.remove_phy_handler = scic_sds_port_default_remove_phy_handler,
.frame_handler = scic_sds_port_default_frame_handler,
.event_handler = scic_sds_port_default_event_handler,
.link_up_handler = scic_sds_port_ready_waiting_substate_link_up_handler,
@ -2090,9 +1957,6 @@ static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] =
.complete_io_handler = scic_sds_port_ready_substate_complete_io_handler,
},
[SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = {
.reset_handler = scic_sds_port_ready_operational_substate_reset_handler,
.add_phy_handler = scic_sds_port_ready_substate_add_phy_handler,
.remove_phy_handler = scic_sds_port_ready_substate_remove_phy_handler,
.frame_handler = scic_sds_port_default_frame_handler,
.event_handler = scic_sds_port_default_event_handler,
.link_up_handler = scic_sds_port_ready_operational_substate_link_up_handler,
@ -2101,9 +1965,6 @@ static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] =
.complete_io_handler = scic_sds_port_ready_substate_complete_io_handler,
},
[SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = {
.reset_handler = scic_sds_port_default_reset_handler,
.add_phy_handler = scic_sds_port_ready_configuring_substate_add_phy_handler,
.remove_phy_handler = scic_sds_port_ready_configuring_substate_remove_phy_handler,
.frame_handler = scic_sds_port_default_frame_handler,
.event_handler = scic_sds_port_default_event_handler,
.link_up_handler = scic_sds_port_default_link_up_handler,
@ -2112,9 +1973,6 @@ static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] =
.complete_io_handler = scic_sds_port_ready_configuring_substate_complete_io_handler
},
[SCI_BASE_PORT_STATE_RESETTING] = {
.reset_handler = scic_sds_port_default_reset_handler,
.add_phy_handler = scic_sds_port_default_add_phy_handler,
.remove_phy_handler = scic_sds_port_default_remove_phy_handler,
.frame_handler = scic_sds_port_default_frame_handler,
.event_handler = scic_sds_port_default_event_handler,
.link_up_handler = scic_sds_port_reset_state_link_up_handler,
@ -2123,9 +1981,6 @@ static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] =
.complete_io_handler = scic_sds_port_general_complete_io_handler
},
[SCI_BASE_PORT_STATE_FAILED] = {
.reset_handler = scic_sds_port_default_reset_handler,
.add_phy_handler = scic_sds_port_default_add_phy_handler,
.remove_phy_handler = scic_sds_port_default_remove_phy_handler,
.frame_handler = scic_sds_port_default_frame_handler,
.event_handler = scic_sds_port_default_event_handler,
.link_up_handler = scic_sds_port_default_link_up_handler,

19
drivers/scsi/isci/port.h
View File

@ -312,24 +312,6 @@ typedef enum sci_status (*scic_sds_port_io_request_handler_t)(struct scic_sds_po
struct scic_sds_request *);
struct scic_sds_port_state_handler {
/**
* The reset_handler specifies the method invoked when a user
* attempts to hard reset a port.
*/
scic_sds_port_reset_handler_t reset_handler;
/**
* The add_phy_handler specifies the method invoked when a user
* attempts to add another phy into the port.
*/
scic_sds_port_phy_handler_t add_phy_handler;
/**
* The remove_phy_handler specifies the method invoked when a user
* attempts to remove a phy from the port.
*/
scic_sds_port_phy_handler_t remove_phy_handler;
scic_sds_port_frame_handler_t frame_handler;
scic_sds_port_event_handler_t event_handler;
@ -338,7 +320,6 @@ struct scic_sds_port_state_handler {
scic_sds_port_io_request_handler_t start_io_handler;
scic_sds_port_io_request_handler_t complete_io_handler;
};
/**