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isci: remove scic_controller state handlers 

Remove the state handler indirections for the scic_controller, and replace
them with procedural calls that check for the correct state first.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Christoph Hellwig 2011-04-02 08:15:20 -04:00 committed by Dan Williams
parent bc5c96748a
commit c629582d0d
6 changed files with 195 additions and 778 deletions
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5
drivers/scsi/isci/core/scic_controller.h
View File

@ -110,11 +110,6 @@ enum sci_task_status scic_controller_start_task(
struct scic_sds_request *task_request,
u16 io_tag);
enum sci_status scic_controller_complete_task(
struct scic_sds_controller *controller,
struct scic_sds_remote_device *remote_device,
struct scic_sds_request *task_request);
enum sci_status scic_controller_terminate_request(
struct scic_sds_controller *controller,
struct scic_sds_remote_device *remote_device,

851
drivers/scsi/isci/core/scic_sds_controller.c
View File

@ -1453,46 +1453,45 @@ void scic_sds_controller_error_handler(struct scic_sds_controller *scic)
void scic_sds_controller_link_up(
struct scic_sds_controller *scic,
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
void scic_sds_controller_link_up(struct scic_sds_controller *scic,
struct scic_sds_port *port, struct scic_sds_phy *phy)
{
scic_sds_controller_phy_handler_t link_up;
u32 state;
state = scic->state_machine.current_state_id;
link_up = scic_sds_controller_state_handler_table[state].link_up;
if (link_up)
link_up(scic, sci_port, sci_phy);
else
switch (scic->state_machine.current_state_id) {
case SCI_BASE_CONTROLLER_STATE_STARTING:
scic_sds_controller_phy_timer_stop(scic);
scic->port_agent.link_up_handler(scic, &scic->port_agent,
port, phy);
scic_sds_controller_start_next_phy(scic);
break;
case SCI_BASE_CONTROLLER_STATE_READY:
scic->port_agent.link_up_handler(scic, &scic->port_agent,
port, phy);
break;
default:
dev_dbg(scic_to_dev(scic),
"%s: SCIC Controller linkup event from phy %d in "
"unexpected state %d\n", __func__, sci_phy->phy_index,
state);
"unexpected state %d\n", __func__, phy->phy_index,
scic->state_machine.current_state_id);
}
}
void scic_sds_controller_link_down(
struct scic_sds_controller *scic,
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
void scic_sds_controller_link_down(struct scic_sds_controller *scic,
struct scic_sds_port *port, struct scic_sds_phy *phy)
{
u32 state;
scic_sds_controller_phy_handler_t link_down;
state = scic->state_machine.current_state_id;
link_down = scic_sds_controller_state_handler_table[state].link_down;
if (link_down)
link_down(scic, sci_port, sci_phy);
else
switch (scic->state_machine.current_state_id) {
case SCI_BASE_CONTROLLER_STATE_STARTING:
case SCI_BASE_CONTROLLER_STATE_READY:
scic->port_agent.link_down_handler(scic, &scic->port_agent,
port, phy);
break;
default:
dev_dbg(scic_to_dev(scic),
"%s: SCIC Controller linkdown event from phy %d in "
"unexpected state %d\n",
__func__,
sci_phy->phy_index, state);
phy->phy_index,
scic->state_machine.current_state_id);
}
}
/**
@ -1518,31 +1517,26 @@ static bool scic_sds_controller_has_remote_devices_stopping(
/**
* This method is called by the remote device to inform the controller
* object that the remote device has stopped.
*
*/
void scic_sds_controller_remote_device_stopped(struct scic_sds_controller *scic,
struct scic_sds_remote_device *sci_dev)
{
u32 state;
scic_sds_controller_device_handler_t stopped;
state = scic->state_machine.current_state_id;
stopped = scic_sds_controller_state_handler_table[state].device_stopped;
if (stopped)
stopped(scic, sci_dev);
else {
if (scic->state_machine.current_state_id !=
SCI_BASE_CONTROLLER_STATE_STOPPING) {
dev_dbg(scic_to_dev(scic),
"%s: SCIC Controller 0x%p remote device stopped event "
"from device 0x%p in unexpected state %d\n",
__func__, scic, sci_dev, state);
"SCIC Controller 0x%p remote device stopped event "
"from device 0x%p in unexpected state %d\n",
scic, sci_dev,
scic->state_machine.current_state_id);
return;
}
if (!scic_sds_controller_has_remote_devices_stopping(scic)) {
sci_base_state_machine_change_state(&scic->state_machine,
SCI_BASE_CONTROLLER_STATE_STOPPED);
}
}
/**
* This method will write to the SCU PCP register the request value. The method
* is used to suspend/resume ports, devices, and phys.
@ -1840,40 +1834,6 @@ static void scic_sds_controller_set_default_config_parameters(struct scic_sds_co
scic->user_parameters.sds1.no_outbound_task_timeout = 20;
}
/**
* scic_controller_initialize() - This method will initialize the controller
* hardware managed by the supplied core controller object. This method
* will bring the physical controller hardware out of reset and enable the
* core to determine the capabilities of the hardware being managed. Thus,
* the core controller can determine it's exact physical (DMA capable)
* memory requirements.
* @controller: This parameter specifies the controller to be initialized.
*
* The SCI Core user must have called scic_controller_construct() on the
* supplied controller object previously. Indicate if the controller was
* successfully initialized or if it failed in some way. SCI_SUCCESS This value
* is returned if the controller hardware was successfully initialized.
*/
enum sci_status scic_controller_initialize(
struct scic_sds_controller *scic)
{
enum sci_status status = SCI_FAILURE_INVALID_STATE;
scic_sds_controller_handler_t initialize;
u32 state;
state = scic->state_machine.current_state_id;
initialize = scic_sds_controller_state_handler_table[state].initialize;
if (initialize)
status = initialize(scic);
else
dev_warn(scic_to_dev(scic),
"%s: SCIC Controller initialize operation requested "
"in invalid state %d\n", __func__, state);
return status;
}
/**
* scic_controller_get_suggested_start_timeout() - This method returns the
* suggested scic_controller_start() timeout amount. The user is free to
@ -1912,49 +1872,6 @@ u32 scic_controller_get_suggested_start_timeout(
+ ((SCI_MAX_PHYS - 1) * SCIC_SDS_CONTROLLER_POWER_CONTROL_INTERVAL);
}
/**
* scic_controller_start() - This method will start the supplied core
* controller. This method will start the staggered spin up operation. The
* SCI User completion callback is called when the following conditions are
* met: -# the return status of this method is SCI_SUCCESS. -# after all of
* the phys have successfully started or been given the opportunity to start.
* @controller: the handle to the controller object to start.
* @timeout: This parameter specifies the number of milliseconds in which the
* start operation should complete.
*
* The SCI Core user must have filled in the physical memory descriptor
* structure via the sci_controller_get_memory_descriptor_list() method. The
* SCI Core user must have invoked the scic_controller_initialize() method
* prior to invoking this method. The controller must be in the INITIALIZED or
* STARTED state. Indicate if the controller start method succeeded or failed
* in some way. SCI_SUCCESS if the start operation succeeded.
* SCI_WARNING_ALREADY_IN_STATE if the controller is already in the STARTED
* state. SCI_FAILURE_INVALID_STATE if the controller is not either in the
* INITIALIZED or STARTED states. SCI_FAILURE_INVALID_MEMORY_DESCRIPTOR if
* there are inconsistent or invalid values in the supplied
* struct sci_physical_memory_descriptor array.
*/
enum sci_status scic_controller_start(
struct scic_sds_controller *scic,
u32 timeout)
{
enum sci_status status = SCI_FAILURE_INVALID_STATE;
scic_sds_controller_timed_handler_t start;
u32 state;
state = scic->state_machine.current_state_id;
start = scic_sds_controller_state_handler_table[state].start;
if (start)
status = start(scic, timeout);
else
dev_warn(scic_to_dev(scic),
"%s: SCIC Controller start operation requested in "
"invalid state %d\n", __func__, state);
return status;
}
/**
* scic_controller_stop() - This method will stop an individual controller
* object.This method will invoke the associated user callback upon
@ -1977,21 +1894,18 @@ enum sci_status scic_controller_stop(
struct scic_sds_controller *scic,
u32 timeout)
{
enum sci_status status = SCI_FAILURE_INVALID_STATE;
scic_sds_controller_timed_handler_t stop;
u32 state;
state = scic->state_machine.current_state_id;
stop = scic_sds_controller_state_handler_table[state].stop;
if (stop)
status = stop(scic, timeout);
else
if (scic->state_machine.current_state_id !=
SCI_BASE_CONTROLLER_STATE_READY) {
dev_warn(scic_to_dev(scic),
"%s: SCIC Controller stop operation requested in "
"invalid state %d\n", __func__, state);
"SCIC Controller stop operation requested in "
"invalid state\n");
return SCI_FAILURE_INVALID_STATE;
}
return status;
isci_timer_start(scic->timeout_timer, timeout);
sci_base_state_machine_change_state(&scic->state_machine,
SCI_BASE_CONTROLLER_STATE_STOPPING);
return SCI_SUCCESS;
}
/**
@ -2009,21 +1923,24 @@ enum sci_status scic_controller_stop(
enum sci_status scic_controller_reset(
struct scic_sds_controller *scic)
{
enum sci_status status = SCI_FAILURE_INVALID_STATE;
scic_sds_controller_handler_t reset;
u32 state;
state = scic->state_machine.current_state_id;
reset = scic_sds_controller_state_handler_table[state].reset;
if (reset)
status = reset(scic);
else
switch (scic->state_machine.current_state_id) {
case SCI_BASE_CONTROLLER_STATE_RESET:
case SCI_BASE_CONTROLLER_STATE_READY:
case SCI_BASE_CONTROLLER_STATE_STOPPED:
case SCI_BASE_CONTROLLER_STATE_FAILED:
/*
* The reset operation is not a graceful cleanup, just
* perform the state transition.
*/
sci_base_state_machine_change_state(&scic->state_machine,
SCI_BASE_CONTROLLER_STATE_RESETTING);
return SCI_SUCCESS;
default:
dev_warn(scic_to_dev(scic),
"%s: SCIC Controller reset operation requested in "
"invalid state %d\n", __func__, state);
return status;
"SCIC Controller reset operation requested in "
"invalid state\n");
return SCI_FAILURE_INVALID_STATE;
}
}
/**
@ -2055,19 +1972,25 @@ enum sci_status scic_controller_reset(
*/
enum sci_io_status scic_controller_start_io(
struct scic_sds_controller *scic,
struct scic_sds_remote_device *remote_device,
struct scic_sds_request *request,
struct scic_sds_remote_device *rdev,
struct scic_sds_request *req,
u16 io_tag)
{
u32 state;
scic_sds_controller_start_request_handler_t start_io;
enum sci_status status;
state = scic->state_machine.current_state_id;
start_io = scic_sds_controller_state_handler_table[state].start_io;
if (scic->state_machine.current_state_id !=
SCI_BASE_CONTROLLER_STATE_READY) {
dev_warn(scic_to_dev(scic), "invalid state to start I/O");
return SCI_FAILURE_INVALID_STATE;
}
return start_io(scic,
(struct sci_base_remote_device *) remote_device,
request, io_tag);
status = scic_sds_remote_device_start_io(scic, rdev, req);
if (status != SCI_SUCCESS)
return status;
scic->io_request_table[scic_sds_io_tag_get_index(req->io_tag)] = req;
scic_sds_controller_post_request(scic, scic_sds_request_get_post_context(req));
return SCI_SUCCESS;
}
/**
@ -2088,18 +2011,30 @@ enum sci_io_status scic_controller_start_io(
*/
enum sci_status scic_controller_terminate_request(
struct scic_sds_controller *scic,
struct scic_sds_remote_device *remote_device,
struct scic_sds_request *request)
struct scic_sds_remote_device *rdev,
struct scic_sds_request *req)
{
scic_sds_controller_request_handler_t terminate_request;
u32 state;
enum sci_status status;
state = scic->state_machine.current_state_id;
terminate_request = scic_sds_controller_state_handler_table[state].terminate_request;
if (scic->state_machine.current_state_id !=
SCI_BASE_CONTROLLER_STATE_READY) {
dev_warn(scic_to_dev(scic),
"invalid state to terminate request\n");
return SCI_FAILURE_INVALID_STATE;
}
return terminate_request(scic,
(struct sci_base_remote_device *)remote_device,
request);
status = scic_sds_io_request_terminate(req);
if (status != SCI_SUCCESS)
return status;
/*
* Utilize the original post context command and or in the POST_TC_ABORT
* request sub-type.
*/
scic_sds_controller_post_request(scic,
scic_sds_request_get_post_context(req) |
SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT);
return SCI_SUCCESS;
}
/**
@ -2126,18 +2061,44 @@ enum sci_status scic_controller_terminate_request(
*/
enum sci_status scic_controller_complete_io(
struct scic_sds_controller *scic,
struct scic_sds_remote_device *remote_device,
struct scic_sds_remote_device *rdev,
struct scic_sds_request *request)
{
u32 state;
scic_sds_controller_request_handler_t complete_io;
enum sci_status status;
u16 index;
state = scic->state_machine.current_state_id;
complete_io = scic_sds_controller_state_handler_table[state].complete_io;
switch (scic->state_machine.current_state_id) {
case SCI_BASE_CONTROLLER_STATE_STOPPING:
/* XXX: Implement this function */
return SCI_FAILURE;
case SCI_BASE_CONTROLLER_STATE_READY:
status = scic_sds_remote_device_complete_io(scic, rdev, request);
if (status != SCI_SUCCESS)
return status;
return complete_io(scic,
(struct sci_base_remote_device *)remote_device,
request);
index = scic_sds_io_tag_get_index(request->io_tag);
scic->io_request_table[index] = NULL;
return SCI_SUCCESS;
default:
dev_warn(scic_to_dev(scic), "invalid state to complete I/O");
return SCI_FAILURE_INVALID_STATE;
}
}
enum sci_status scic_controller_continue_io(struct scic_sds_request *sci_req)
{
struct scic_sds_controller *scic = sci_req->owning_controller;
if (scic->state_machine.current_state_id !=
SCI_BASE_CONTROLLER_STATE_READY) {
dev_warn(scic_to_dev(scic), "invalid state to continue I/O");
return SCI_FAILURE_INVALID_STATE;
}
scic->io_request_table[scic_sds_io_tag_get_index(sci_req->io_tag)] = sci_req;
scic_sds_controller_post_request(scic, scic_sds_request_get_post_context(sci_req));
return SCI_SUCCESS;
}
/**
@ -2170,71 +2131,45 @@ enum sci_status scic_controller_complete_io(
*/
enum sci_task_status scic_controller_start_task(
struct scic_sds_controller *scic,
struct scic_sds_remote_device *remote_device,
struct scic_sds_request *task_request,
struct scic_sds_remote_device *rdev,
struct scic_sds_request *req,
u16 task_tag)
{
u32 state;
scic_sds_controller_start_request_handler_t start_task;
enum sci_task_status status = SCI_TASK_FAILURE_INVALID_STATE;
enum sci_status status;
state = scic->state_machine.current_state_id;
start_task = scic_sds_controller_state_handler_table[state].start_task;
if (start_task)
status = start_task(scic,
(struct sci_base_remote_device *)remote_device,
task_request,
task_tag);
else
if (scic->state_machine.current_state_id !=
SCI_BASE_CONTROLLER_STATE_READY) {
dev_warn(scic_to_dev(scic),
"%s: SCIC Controller starting task from invalid "
"state\n",
__func__);
return SCI_TASK_FAILURE_INVALID_STATE;
}
status = scic_sds_remote_device_start_task(scic, rdev, req);
switch (status) {
case SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS:
scic->io_request_table[scic_sds_io_tag_get_index(req->io_tag)] = req;
/*
* We will let framework know this task request started successfully,
* although core is still woring on starting the request (to post tc when
* RNC is resumed.)
*/
return SCI_SUCCESS;
case SCI_SUCCESS:
scic->io_request_table[scic_sds_io_tag_get_index(req->io_tag)] = req;
scic_sds_controller_post_request(scic,
scic_sds_request_get_post_context(req));
break;
default:
break;
}
return status;
}
/**
* scic_controller_complete_task() - This method will perform core specific
* completion operations for task management request. After this method is
* invoked, the user should consider the task request as invalid until it is
* properly reused (i.e. re-constructed).
* @controller: The handle to the controller object for which to complete the
* task management request.
* @remote_device: The handle to the remote device object for which to complete
* the task management request.
* @task_request: the handle to the task management request object to complete.
*
* Indicate if the controller successfully completed the task management
* request. SCI_SUCCESS if the completion process was successful.
*/
enum sci_status scic_controller_complete_task(
struct scic_sds_controller *scic,
struct scic_sds_remote_device *remote_device,
struct scic_sds_request *task_request)
{
u32 state;
scic_sds_controller_request_handler_t complete_task;
enum sci_status status = SCI_FAILURE_INVALID_STATE;
state = scic->state_machine.current_state_id;
complete_task = scic_sds_controller_state_handler_table[state].complete_task;
if (complete_task)
status = complete_task(scic,
(struct sci_base_remote_device *)remote_device,
task_request);
else
dev_warn(scic_to_dev(scic),
"%s: SCIC Controller completing task from invalid "
"state\n",
__func__);
return status;
}
/**
* scic_controller_get_port_handle() - This method simply provides the user
* with a unique handle for a given SAS/SATA core port index.
@ -2706,52 +2641,23 @@ struct scic_sds_controller *scic_controller_alloc(struct device *dev)
return devm_kzalloc(dev, sizeof(struct scic_sds_controller), GFP_KERNEL);
}
static enum sci_status
default_controller_handler(struct scic_sds_controller *scic, const char *func)
{
dev_warn(scic_to_dev(scic), "%s: invalid state %d\n", func,
scic->state_machine.current_state_id);
return SCI_FAILURE_INVALID_STATE;
}
static enum sci_status scic_sds_controller_default_start_operation_handler(
struct scic_sds_controller *scic,
struct sci_base_remote_device *remote_device,
struct scic_sds_request *request,
u16 io_tag)
{
return default_controller_handler(scic, __func__);
}
static enum sci_status scic_sds_controller_default_request_handler(
struct scic_sds_controller *scic,
struct sci_base_remote_device *remote_device,
struct scic_sds_request *request)
{
return default_controller_handler(scic, __func__);
}
static enum sci_status
scic_sds_controller_general_reset_handler(struct scic_sds_controller *scic)
{
/* The reset operation is not a graceful cleanup just perform the state
* transition.
*/
sci_base_state_machine_change_state(&scic->state_machine,
SCI_BASE_CONTROLLER_STATE_RESETTING);
return SCI_SUCCESS;
}
static enum sci_status
scic_sds_controller_reset_state_initialize_handler(struct scic_sds_controller *scic)
enum sci_status scic_controller_initialize(
struct scic_sds_controller *scic)
{
struct sci_base_state_machine *sm = &scic->state_machine;
enum sci_status result = SCI_SUCCESS;
struct isci_host *ihost;
u32 index, state;
if (scic->state_machine.current_state_id !=
SCI_BASE_CONTROLLER_STATE_RESET) {
dev_warn(scic_to_dev(scic),
"SCIC Controller initialize operation requested "
"in invalid state\n");
return SCI_FAILURE_INVALID_STATE;
}
ihost = sci_object_get_association(scic);
sci_base_state_machine_change_state(sm, SCI_BASE_CONTROLLER_STATE_INITIALIZING);
@ -2908,30 +2814,19 @@ scic_sds_controller_reset_state_initialize_handler(struct scic_sds_controller *s
return result;
}
/*
* *****************************************************************************
* * INITIALIZED STATE HANDLERS
* ***************************************************************************** */
/*
* This function is the struct scic_sds_controller start handler for the
* initialized state.
* - Validate we have a good memory descriptor table - Initialze the
* physical memory before programming the hardware - Program the SCU hardware
* with the physical memory addresses passed in the memory descriptor table. -
* Initialzie the TCi pool - Initialize the RNi pool - Initialize the
* completion queue - Initialize the unsolicited frame data - Take the SCU port
* task scheduler out of reset - Start the first phy object. - Transition to
* SCI_BASE_CONTROLLER_STATE_STARTING. enum sci_status SCI_SUCCESS if all of the
* controller start operations complete
* SCI_FAILURE_UNSUPPORTED_INFORMATION_FIELD if one or more of the memory
* descriptor fields is invalid.
*/
static enum sci_status scic_sds_controller_initialized_state_start_handler(
struct scic_sds_controller *scic, u32 timeout)
enum sci_status scic_controller_start(struct scic_sds_controller *scic,
u32 timeout)
{
u16 index;
enum sci_status result;
u16 index;
if (scic->state_machine.current_state_id !=
SCI_BASE_CONTROLLER_STATE_INITIALIZED) {
dev_warn(scic_to_dev(scic),
"SCIC Controller start operation requested in "
"invalid state\n");
return SCI_FAILURE_INVALID_STATE;
}
/* Build the TCi free pool */
sci_pool_initialize(scic->tci_pool);
@ -2981,376 +2876,6 @@ static enum sci_status scic_sds_controller_initialized_state_start_handler(
return SCI_SUCCESS;
}
/*
* *****************************************************************************
* * INITIALIZED STATE HANDLERS
* ***************************************************************************** */
/**
*
* @controller: This is struct scic_sds_controller which receives the link up
* notification.
* @port: This is struct scic_sds_port with which the phy is associated.
* @phy: This is the struct scic_sds_phy which has gone link up.
*
* This method is called when the struct scic_sds_controller is in the starting state
* link up handler is called. This method will perform the following: - Stop
* the phy timer - Start the next phy - Report the link up condition to the
* port object none
*/
static void scic_sds_controller_starting_state_link_up_handler(
struct scic_sds_controller *this_controller,
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
scic_sds_controller_phy_timer_stop(this_controller);
this_controller->port_agent.link_up_handler(
this_controller, &this_controller->port_agent, port, phy
);
/* scic_sds_port_link_up(port, phy); */
scic_sds_controller_start_next_phy(this_controller);
}
/**
*
* @controller: This is struct scic_sds_controller which receives the link down
* notification.
* @port: This is struct scic_sds_port with which the phy is associated.
* @phy: This is the struct scic_sds_phy which has gone link down.
*
* This method is called when the struct scic_sds_controller is in the starting state
* link down handler is called. - Report the link down condition to the port
* object none
*/
static void scic_sds_controller_starting_state_link_down_handler(
struct scic_sds_controller *this_controller,
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
this_controller->port_agent.link_down_handler(
this_controller, &this_controller->port_agent, port, phy
);
/* scic_sds_port_link_down(port, phy); */
}
static enum sci_status scic_sds_controller_ready_state_stop_handler(
struct scic_sds_controller *scic,
u32 timeout)
{
isci_timer_start(scic->timeout_timer, timeout);
sci_base_state_machine_change_state(&scic->state_machine,
SCI_BASE_CONTROLLER_STATE_STOPPING);
return SCI_SUCCESS;
}
/*
* This method is called when the struct scic_sds_controller is in the ready state and
* the start io handler is called. - Start the io request on the remote device
* - if successful - assign the io_request to the io_request_table - post the
* request to the hardware enum sci_status SCI_SUCCESS if the start io operation
* succeeds SCI_FAILURE_INSUFFICIENT_RESOURCES if the IO tag could not be
* allocated for the io request. SCI_FAILURE_INVALID_STATE if one or more
* objects are not in a valid state to accept io requests.
*
* XXX: How does the io_tag parameter get assigned to the io request?
*/
static enum sci_status scic_sds_controller_ready_state_start_io_handler(
struct scic_sds_controller *controller,
struct sci_base_remote_device *remote_device,
struct scic_sds_request *request,
u16 io_tag)
{
enum sci_status status;
struct scic_sds_remote_device *the_device;
the_device = (struct scic_sds_remote_device *)remote_device;
status = scic_sds_remote_device_start_io(controller, the_device, request);
if (status != SCI_SUCCESS)
return status;
controller->io_request_table[
scic_sds_io_tag_get_index(request->io_tag)] = request;
scic_sds_controller_post_request(controller,
scic_sds_request_get_post_context(request));
return SCI_SUCCESS;
}
/*
* This method is called when the struct scic_sds_controller is in the ready state and
* the complete io handler is called. - Complete the io request on the remote
* device - if successful - remove the io_request to the io_request_table
* enum sci_status SCI_SUCCESS if the start io operation succeeds
* SCI_FAILURE_INVALID_STATE if one or more objects are not in a valid state to
* accept io requests.
*/
static enum sci_status scic_sds_controller_ready_state_complete_io_handler(
struct scic_sds_controller *controller,
struct sci_base_remote_device *remote_device,
struct scic_sds_request *request)
{
u16 index;
enum sci_status status;
struct scic_sds_remote_device *the_device;
the_device = (struct scic_sds_remote_device *)remote_device;
status = scic_sds_remote_device_complete_io(controller, the_device,
request);
if (status != SCI_SUCCESS)
return status;
index = scic_sds_io_tag_get_index(request->io_tag);
controller->io_request_table[index] = NULL;
return SCI_SUCCESS;
}
/*
* This method is called when the struct scic_sds_controller is in the ready state and
* the continue io handler is called. enum sci_status
*/
static enum sci_status scic_sds_controller_ready_state_continue_io_handler(
struct scic_sds_controller *controller,
struct sci_base_remote_device *remote_device,
struct scic_sds_request *request)
{
controller->io_request_table[
scic_sds_io_tag_get_index(request->io_tag)] = request;
scic_sds_controller_post_request(controller,
scic_sds_request_get_post_context(request));
return SCI_SUCCESS;
}
/*
* This method is called when the struct scic_sds_controller is in the ready state and
* the start task handler is called. - The remote device is requested to start
* the task request - if successful - assign the task to the io_request_table -
* post the request to the SCU hardware enum sci_status SCI_SUCCESS if the start io
* operation succeeds SCI_FAILURE_INSUFFICIENT_RESOURCES if the IO tag could
* not be allocated for the io request. SCI_FAILURE_INVALID_STATE if one or
* more objects are not in a valid state to accept io requests. How does the io
* tag get assigned in this code path?
*/
static enum sci_status scic_sds_controller_ready_state_start_task_handler(
struct scic_sds_controller *controller,
struct sci_base_remote_device *remote_device,
struct scic_sds_request *request,
u16 task_tag)
{
struct scic_sds_remote_device *the_device = (struct scic_sds_remote_device *)
remote_device;
enum sci_status status;
status = scic_sds_remote_device_start_task(controller, the_device,
request);
if (status == SCI_SUCCESS) {
controller->io_request_table[
scic_sds_io_tag_get_index(request->io_tag)] = request;
scic_sds_controller_post_request(controller,
scic_sds_request_get_post_context(request));
} else if (status == SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS) {
controller->io_request_table[
scic_sds_io_tag_get_index(request->io_tag)] = request;
/*
* We will let framework know this task request started successfully,
* although core is still woring on starting the request (to post tc when
* RNC is resumed.) */
status = SCI_SUCCESS;
}
return status;
}
/*
* This method is called when the struct scic_sds_controller is in the ready state and
* the terminate request handler is called. - call the io request terminate
* function - if successful - post the terminate request to the SCU hardware
* enum sci_status SCI_SUCCESS if the start io operation succeeds
* SCI_FAILURE_INVALID_STATE if one or more objects are not in a valid state to
* accept io requests.
*/
static enum sci_status scic_sds_controller_ready_state_terminate_request_handler(
struct scic_sds_controller *controller,
struct sci_base_remote_device *remote_device,
struct scic_sds_request *request)
{
enum sci_status status;
status = scic_sds_io_request_terminate(request);
if (status != SCI_SUCCESS)
return status;
/*
* Utilize the original post context command and or in the POST_TC_ABORT
* request sub-type.
*/
scic_sds_controller_post_request(controller,
scic_sds_request_get_post_context(request) |
SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT);
return SCI_SUCCESS;
}
/**
*
* @controller: This is struct scic_sds_controller which receives the link up
* notification.
* @port: This is struct scic_sds_port with which the phy is associated.
* @phy: This is the struct scic_sds_phy which has gone link up.
*
* This method is called when the struct scic_sds_controller is in the starting state
* link up handler is called. This method will perform the following: - Stop
* the phy timer - Start the next phy - Report the link up condition to the
* port object none
*/
static void scic_sds_controller_ready_state_link_up_handler(
struct scic_sds_controller *this_controller,
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
this_controller->port_agent.link_up_handler(
this_controller, &this_controller->port_agent, port, phy
);
}
/**
*
* @controller: This is struct scic_sds_controller which receives the link down
* notification.
* @port: This is struct scic_sds_port with which the phy is associated.
* @phy: This is the struct scic_sds_phy which has gone link down.
*
* This method is called when the struct scic_sds_controller is in the starting state
* link down handler is called. - Report the link down condition to the port
* object none
*/
static void scic_sds_controller_ready_state_link_down_handler(
struct scic_sds_controller *this_controller,
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
this_controller->port_agent.link_down_handler(
this_controller, &this_controller->port_agent, port, phy
);
}
/*
* *****************************************************************************
* * STOPPING STATE HANDLERS
* ***************************************************************************** */
/**
* This method is called when the struct scic_sds_controller is in a stopping state
* and the complete io handler is called. - This function is not yet
* implemented enum sci_status SCI_FAILURE
*/
static enum sci_status scic_sds_controller_stopping_state_complete_io_handler(
struct scic_sds_controller *controller,
struct sci_base_remote_device *remote_device,
struct scic_sds_request *request)
{
/* XXX: Implement this function */
return SCI_FAILURE;
}
/**
* This method is called when the struct scic_sds_controller is in a stopping state
* and the remote device has stopped.
**/
static void scic_sds_controller_stopping_state_device_stopped_handler(
struct scic_sds_controller *controller,
struct scic_sds_remote_device *remote_device
)
{
if (!scic_sds_controller_has_remote_devices_stopping(controller)) {
sci_base_state_machine_change_state(&controller->state_machine,
SCI_BASE_CONTROLLER_STATE_STOPPED
);
}
}
const struct scic_sds_controller_state_handler scic_sds_controller_state_handler_table[] = {
[SCI_BASE_CONTROLLER_STATE_INITIAL] = {
.start_io = scic_sds_controller_default_start_operation_handler,
.complete_io = scic_sds_controller_default_request_handler,
.continue_io = scic_sds_controller_default_request_handler,
.terminate_request = scic_sds_controller_default_request_handler,
},
[SCI_BASE_CONTROLLER_STATE_RESET] = {
.reset = scic_sds_controller_general_reset_handler,
.initialize = scic_sds_controller_reset_state_initialize_handler,
.start_io = scic_sds_controller_default_start_operation_handler,
.complete_io = scic_sds_controller_default_request_handler,
.continue_io = scic_sds_controller_default_request_handler,
.terminate_request = scic_sds_controller_default_request_handler,
},
[SCI_BASE_CONTROLLER_STATE_INITIALIZING] = {
.start_io = scic_sds_controller_default_start_operation_handler,
.complete_io = scic_sds_controller_default_request_handler,
.continue_io = scic_sds_controller_default_request_handler,
.terminate_request = scic_sds_controller_default_request_handler,
},
[SCI_BASE_CONTROLLER_STATE_INITIALIZED] = {
.start = scic_sds_controller_initialized_state_start_handler,
.start_io = scic_sds_controller_default_start_operation_handler,
.complete_io = scic_sds_controller_default_request_handler,
.continue_io = scic_sds_controller_default_request_handler,
.terminate_request = scic_sds_controller_default_request_handler,
},
[SCI_BASE_CONTROLLER_STATE_STARTING] = {
.start_io = scic_sds_controller_default_start_operation_handler,
.complete_io = scic_sds_controller_default_request_handler,
.continue_io = scic_sds_controller_default_request_handler,
.terminate_request = scic_sds_controller_default_request_handler,
.link_up = scic_sds_controller_starting_state_link_up_handler,
.link_down = scic_sds_controller_starting_state_link_down_handler
},
[SCI_BASE_CONTROLLER_STATE_READY] = {
.stop = scic_sds_controller_ready_state_stop_handler,
.reset = scic_sds_controller_general_reset_handler,
.start_io = scic_sds_controller_ready_state_start_io_handler,
.complete_io = scic_sds_controller_ready_state_complete_io_handler,
.continue_io = scic_sds_controller_ready_state_continue_io_handler,
.start_task = scic_sds_controller_ready_state_start_task_handler,
.complete_task = scic_sds_controller_ready_state_complete_io_handler,
.terminate_request = scic_sds_controller_ready_state_terminate_request_handler,
.link_up = scic_sds_controller_ready_state_link_up_handler,
.link_down = scic_sds_controller_ready_state_link_down_handler
},
[SCI_BASE_CONTROLLER_STATE_RESETTING] = {
.start_io = scic_sds_controller_default_start_operation_handler,
.complete_io = scic_sds_controller_default_request_handler,
.continue_io = scic_sds_controller_default_request_handler,
.terminate_request = scic_sds_controller_default_request_handler,
},
[SCI_BASE_CONTROLLER_STATE_STOPPING] = {
.start_io = scic_sds_controller_default_start_operation_handler,
.complete_io = scic_sds_controller_stopping_state_complete_io_handler,
.continue_io = scic_sds_controller_default_request_handler,
.terminate_request = scic_sds_controller_default_request_handler,
.device_stopped = scic_sds_controller_stopping_state_device_stopped_handler,
},
[SCI_BASE_CONTROLLER_STATE_STOPPED] = {
.reset = scic_sds_controller_general_reset_handler,
.start_io = scic_sds_controller_default_start_operation_handler,
.complete_io = scic_sds_controller_default_request_handler,
.continue_io = scic_sds_controller_default_request_handler,
.terminate_request = scic_sds_controller_default_request_handler,
},
[SCI_BASE_CONTROLLER_STATE_FAILED] = {
.reset = scic_sds_controller_general_reset_handler,
.start_io = scic_sds_controller_default_start_operation_handler,
.complete_io = scic_sds_controller_default_request_handler,
.continue_io = scic_sds_controller_default_request_handler,
.terminate_request = scic_sds_controller_default_request_handler,
},
};
/**
*
* @object: This is the struct sci_base_object which is cast to a struct scic_sds_controller

86
drivers/scsi/isci/core/scic_sds_controller.h
View File

@ -430,90 +430,6 @@ enum scic_sds_controller_states {
};
typedef enum sci_status (*scic_sds_controller_handler_t)
(struct scic_sds_controller *);
typedef enum sci_status (*scic_sds_controller_timed_handler_t)
(struct scic_sds_controller *, u32);
typedef enum sci_status (*scic_sds_controller_request_handler_t)
(struct scic_sds_controller *,
struct sci_base_remote_device *,
struct scic_sds_request *);
typedef enum sci_status (*scic_sds_controller_start_request_handler_t)
(struct scic_sds_controller *,
struct sci_base_remote_device *,
struct scic_sds_request *, u16);
typedef void (*scic_sds_controller_phy_handler_t)
(struct scic_sds_controller *,
struct scic_sds_port *,
struct scic_sds_phy *);
typedef void (*scic_sds_controller_device_handler_t)
(struct scic_sds_controller *,
struct scic_sds_remote_device *);
struct scic_sds_controller_state_handler {
/**
* The start_handler specifies the method invoked when a user attempts to
* start a controller.
*/
scic_sds_controller_timed_handler_t start;
/**
* The stop_handler specifies the method invoked when a user attempts to
* stop a controller.
*/
scic_sds_controller_timed_handler_t stop;
/**
* The reset_handler specifies the method invoked when a user attempts to
* reset a controller.
*/
scic_sds_controller_handler_t reset;
/**
* The initialize_handler specifies the method invoked when a user
* attempts to initialize a controller.
*/
scic_sds_controller_handler_t initialize;
/**
* The start_io_handler specifies the method invoked when a user
* attempts to start an IO request for a controller.
*/
scic_sds_controller_start_request_handler_t start_io;
/**
* The complete_io_handler specifies the method invoked when a user
* attempts to complete an IO request for a controller.
*/
scic_sds_controller_request_handler_t complete_io;
/**
* The continue_io_handler specifies the method invoked when a user
* attempts to continue an IO request for a controller.
*/
scic_sds_controller_request_handler_t continue_io;
/**
* The start_task_handler specifies the method invoked when a user
* attempts to start a task management request for a controller.
*/
scic_sds_controller_start_request_handler_t start_task;
/**
* The complete_task_handler specifies the method invoked when a user
* attempts to complete a task management request for a controller.
*/
scic_sds_controller_request_handler_t complete_task;
scic_sds_controller_request_handler_t terminate_request;
scic_sds_controller_phy_handler_t link_up;
scic_sds_controller_phy_handler_t link_down;
scic_sds_controller_device_handler_t device_stopped;
};
extern const struct scic_sds_controller_state_handler
scic_sds_controller_state_handler_table[];
/**
* INCREMENT_QUEUE_GET() -
*
@ -676,4 +592,6 @@ void scic_sds_controller_copy_task_context(
void scic_sds_controller_register_setup(
struct scic_sds_controller *this_controller);
enum sci_status scic_controller_continue_io(struct scic_sds_request *sci_req);
#endif /* _SCIC_SDS_CONTROLLER_H_ */

11
drivers/scsi/isci/core/scic_sds_remote_device.c
View File

@ -558,17 +558,10 @@ void scic_sds_remote_device_start_request(
void scic_sds_remote_device_continue_request(void *dev)
{
struct scic_sds_remote_device *sci_dev = dev;
struct scic_sds_request *sci_req = sci_dev->working_request;
/* we need to check if this request is still valid to continue. */
if (sci_req) {
struct scic_sds_controller *scic = sci_req->owning_controller;
u32 state = scic->state_machine.current_state_id;
scic_sds_controller_request_handler_t continue_io;
continue_io = scic_sds_controller_state_handler_table[state].continue_io;
continue_io(scic, &sci_req->target_device->parent, sci_req);
}
if (sci_dev->working_request)
scic_controller_continue_io(sci_dev->working_request);
}
/**

18
drivers/scsi/isci/core/scic_sds_stp_request.c
View File

@ -637,10 +637,7 @@ static enum sci_status scic_sds_stp_request_pio_data_out_trasmit_data_frame(
u32 length)
{
struct scic_sds_stp_request *this_sds_stp_request = (struct scic_sds_stp_request *)this_request;
scic_sds_controller_request_handler_t continue_io;
struct scu_sgl_element *current_sgl;
struct scic_sds_controller *scic;
u32 state;
/*
* Recycle the TC and reconstruct it for sending out DATA FIS containing
@ -662,10 +659,7 @@ static enum sci_status scic_sds_stp_request_pio_data_out_trasmit_data_frame(
task_context->type.stp.fis_type = SATA_FIS_TYPE_DATA;
/* send the new TC out. */
scic = this_request->owning_controller;
state = scic->state_machine.current_state_id;
continue_io = scic_sds_controller_state_handler_table[state].continue_io;
return continue_io(scic, &this_request->target_device->parent, this_request);
return scic_controller_continue_io(this_request);
}
/**
@ -1758,12 +1752,9 @@ static void scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_complet
struct sci_base_object *object)
{
struct scic_sds_request *this_request = (struct scic_sds_request *)object;
scic_sds_controller_request_handler_t continue_io;
struct scu_task_context *task_context;
struct sata_fis_reg_h2d *h2d_fis;
struct scic_sds_controller *scic;
enum sci_status status;
u32 state;
/* Clear the SRST bit */
h2d_fis = scic_stp_io_request_get_h2d_reg_address(this_request);
@ -1774,12 +1765,7 @@ static void scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_complet
this_request->owning_controller, this_request->io_tag);
task_context->control_frame = 0;
scic = this_request->owning_controller;
state = scic->state_machine.current_state_id;
continue_io = scic_sds_controller_state_handler_table[state].continue_io;
status = continue_io(scic, &this_request->target_device->parent, this_request);
status = scic_controller_continue_io(this_request);
if (status == SCI_SUCCESS) {
SET_STATE_HANDLER(
this_request,

2
drivers/scsi/isci/task.c
View File

@ -1480,7 +1480,7 @@ void isci_task_request_complete(
/* PRINT_TMF( ((struct isci_tmf *)request->task)); */
tmf_complete = tmf->complete;
scic_controller_complete_task(
scic_controller_complete_io(
isci_host->core_controller,
to_sci_dev(isci_device),
request->sci_request_handle