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isci: unify rnc event handlers

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Unify rnc event handlers and delete the state handler.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2011-05-12 07:46:59 -07:00
parent 6813820c7b
commit 338e386d12
2 changed files with 111 additions and 270 deletions
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365
drivers/scsi/isci/remote_node_context.c
View file

@ -299,21 +299,6 @@ static enum sci_status scic_sds_remote_node_context_default_start_task_handler(
return SCI_FAILURE; return SCI_FAILURE;
} }
static enum sci_status scic_sds_remote_node_context_default_event_handler(
struct scic_sds_remote_node_context *sci_rnc,
u32 event_code)
{
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: SCIC Remote Node Context 0x%p requested to process "
"event 0x%x while in wrong state %d\n",
__func__,
sci_rnc,
event_code,
sci_base_state_machine_get_state(&sci_rnc->state_machine));
return SCI_FAILURE_INVALID_STATE;
}
/** /**
* *
* @sci_rnc: The rnc for which the task request is targeted. * @sci_rnc: The rnc for which the task request is targeted.
@ -383,41 +368,6 @@ static enum sci_status scic_sds_remote_node_context_initial_state_resume_handler
return SCI_FAILURE_INVALID_STATE; return SCI_FAILURE_INVALID_STATE;
} }
/* --------------------------------------------------------------------------- */
static enum sci_status scic_sds_remote_node_context_posting_state_event_handler(
struct scic_sds_remote_node_context *sci_rnc,
u32 event_code)
{
enum sci_status status;
switch (scu_get_event_code(event_code)) {
case SCU_EVENT_POST_RNC_COMPLETE:
status = SCI_SUCCESS;
sci_base_state_machine_change_state(
&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE
);
break;
default:
status = SCI_FAILURE;
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: SCIC Remote Node Context 0x%p requested to "
"process unexpected event 0x%x while in posting "
"state\n",
__func__,
sci_rnc,
event_code);
break;
}
return status;
}
/* --------------------------------------------------------------------------- */
static enum sci_status scic_sds_remote_node_context_invalidating_state_destruct_handler( static enum sci_status scic_sds_remote_node_context_invalidating_state_destruct_handler(
struct scic_sds_remote_node_context *sci_rnc, struct scic_sds_remote_node_context *sci_rnc,
scics_sds_remote_node_context_callback callback, scics_sds_remote_node_context_callback callback,
@ -430,110 +380,6 @@ static enum sci_status scic_sds_remote_node_context_invalidating_state_destruct_
return SCI_SUCCESS; return SCI_SUCCESS;
} }
static enum sci_status scic_sds_remote_node_context_invalidating_state_event_handler(
struct scic_sds_remote_node_context *sci_rnc,
u32 event_code)
{
enum sci_status status;
if (scu_get_event_code(event_code) == SCU_EVENT_POST_RNC_INVALIDATE_COMPLETE) {
status = SCI_SUCCESS;
if (sci_rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL) {
sci_base_state_machine_change_state(
&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE
);
} else {
sci_base_state_machine_change_state(
&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE
);
}
} else {
switch (scu_get_event_type(event_code)) {
case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
/*
* We really dont care if the hardware is going to suspend
* the device since it's being invalidated anyway */
dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: SCIC Remote Node Context 0x%p was "
"suspeneded by hardware while being "
"invalidated.\n",
__func__,
sci_rnc);
status = SCI_SUCCESS;
break;
default:
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: SCIC Remote Node Context 0x%p "
"requested to process event 0x%x while "
"in state %d.\n",
__func__,
sci_rnc,
event_code,
sci_base_state_machine_get_state(
&sci_rnc->state_machine));
status = SCI_FAILURE;
break;
}
}
return status;
}
/* --------------------------------------------------------------------------- */
static enum sci_status scic_sds_remote_node_context_resuming_state_event_handler(
struct scic_sds_remote_node_context *sci_rnc,
u32 event_code)
{
enum sci_status status;
if (scu_get_event_code(event_code) == SCU_EVENT_POST_RCN_RELEASE) {
status = SCI_SUCCESS;
sci_base_state_machine_change_state(
&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE
);
} else {
switch (scu_get_event_type(event_code)) {
case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
/*
* We really dont care if the hardware is going to suspend
* the device since it's being resumed anyway */
dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: SCIC Remote Node Context 0x%p was "
"suspeneded by hardware while being resumed.\n",
__func__,
sci_rnc);
status = SCI_SUCCESS;
break;
default:
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: SCIC Remote Node Context 0x%p requested "
"to process event 0x%x while in state %d.\n",
__func__,
sci_rnc,
event_code,
sci_base_state_machine_get_state(
&sci_rnc->state_machine));
status = SCI_FAILURE;
break;
}
}
return status;
}
/* --------------------------------------------------------------------------- */
/** /**
* *
* @sci_rnc: The remote node context object being suspended. * @sci_rnc: The remote node context object being suspended.
@ -582,53 +428,6 @@ static enum sci_status scic_sds_remote_node_context_ready_state_start_io_handler
return SCI_SUCCESS; return SCI_SUCCESS;
} }
static enum sci_status scic_sds_remote_node_context_ready_state_event_handler(
struct scic_sds_remote_node_context *sci_rnc,
u32 event_code)
{
enum sci_status status;
switch (scu_get_event_type(event_code)) {
case SCU_EVENT_TL_RNC_SUSPEND_TX:
sci_base_state_machine_change_state(
&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE
);
sci_rnc->suspension_code = scu_get_event_specifier(event_code);
status = SCI_SUCCESS;
break;
case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
sci_base_state_machine_change_state(
&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE
);
sci_rnc->suspension_code = scu_get_event_specifier(event_code);
status = SCI_SUCCESS;
break;
default:
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: SCIC Remote Node Context 0x%p requested to "
"process event 0x%x while in state %d.\n",
__func__,
sci_rnc,
event_code,
sci_base_state_machine_get_state(
&sci_rnc->state_machine));
status = SCI_FAILURE;
break;
}
return status;
}
/* --------------------------------------------------------------------------- */
static enum sci_status scic_sds_remote_node_context_tx_suspended_state_resume_handler( static enum sci_status scic_sds_remote_node_context_tx_suspended_state_resume_handler(
struct scic_sds_remote_node_context *sci_rnc, struct scic_sds_remote_node_context *sci_rnc,
scics_sds_remote_node_context_callback callback, scics_sds_remote_node_context_callback callback,
@ -738,61 +537,13 @@ static enum sci_status scic_sds_remote_node_context_await_suspension_state_start
return SCI_SUCCESS; return SCI_SUCCESS;
} }
static enum sci_status scic_sds_remote_node_context_await_suspension_state_event_handler( static struct scic_sds_remote_node_context_handlers scic_sds_remote_node_context_state_handler_table[] = {
struct scic_sds_remote_node_context *sci_rnc,
u32 event_code)
{
enum sci_status status;
switch (scu_get_event_type(event_code)) {
case SCU_EVENT_TL_RNC_SUSPEND_TX:
sci_base_state_machine_change_state(
&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE
);
sci_rnc->suspension_code = scu_get_event_specifier(event_code);
status = SCI_SUCCESS;
break;
case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
sci_base_state_machine_change_state(
&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE
);
sci_rnc->suspension_code = scu_get_event_specifier(event_code);
status = SCI_SUCCESS;
break;
default:
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: SCIC Remote Node Context 0x%p requested to "
"process event 0x%x while in state %d.\n",
__func__,
sci_rnc,
event_code,
sci_base_state_machine_get_state(
&sci_rnc->state_machine));
status = SCI_FAILURE;
break;
}
return status;
}
/* --------------------------------------------------------------------------- */
static struct scic_sds_remote_node_context_handlers
scic_sds_remote_node_context_state_handler_table[] = {
[SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE] = { [SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE] = {
.destruct_handler = scic_sds_remote_node_context_default_destruct_handler, .destruct_handler = scic_sds_remote_node_context_default_destruct_handler,
.suspend_handler = scic_sds_remote_node_context_default_suspend_handler, .suspend_handler = scic_sds_remote_node_context_default_suspend_handler,
.resume_handler = scic_sds_remote_node_context_initial_state_resume_handler, .resume_handler = scic_sds_remote_node_context_initial_state_resume_handler,
.start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler,
.start_task_handler = scic_sds_remote_node_context_default_start_task_handler, .start_task_handler = scic_sds_remote_node_context_default_start_task_handler,
.event_handler = scic_sds_remote_node_context_default_event_handler
}, },
[SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE] = { [SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE] = {
.destruct_handler = scic_sds_remote_node_context_general_destruct_handler, .destruct_handler = scic_sds_remote_node_context_general_destruct_handler,
@ -800,7 +551,6 @@ scic_sds_remote_node_context_state_handler_table[] = {
.resume_handler = scic_sds_remote_node_context_continue_to_resume_handler, .resume_handler = scic_sds_remote_node_context_continue_to_resume_handler,
.start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler,
.start_task_handler = scic_sds_remote_node_context_default_start_task_handler, .start_task_handler = scic_sds_remote_node_context_default_start_task_handler,
.event_handler = scic_sds_remote_node_context_posting_state_event_handler
}, },
[SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE] = { [SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE] = {
.destruct_handler = scic_sds_remote_node_context_invalidating_state_destruct_handler, .destruct_handler = scic_sds_remote_node_context_invalidating_state_destruct_handler,
@ -808,7 +558,6 @@ scic_sds_remote_node_context_state_handler_table[] = {
.resume_handler = scic_sds_remote_node_context_continue_to_resume_handler, .resume_handler = scic_sds_remote_node_context_continue_to_resume_handler,
.start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler,
.start_task_handler = scic_sds_remote_node_context_default_start_task_handler, .start_task_handler = scic_sds_remote_node_context_default_start_task_handler,
.event_handler = scic_sds_remote_node_context_invalidating_state_event_handler
}, },
[SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE] = { [SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE] = {
.destruct_handler = scic_sds_remote_node_context_general_destruct_handler, .destruct_handler = scic_sds_remote_node_context_general_destruct_handler,
@ -816,7 +565,6 @@ scic_sds_remote_node_context_state_handler_table[] = {
.resume_handler = scic_sds_remote_node_context_continue_to_resume_handler, .resume_handler = scic_sds_remote_node_context_continue_to_resume_handler,
.start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler,
.start_task_handler = scic_sds_remote_node_context_success_start_task_handler, .start_task_handler = scic_sds_remote_node_context_success_start_task_handler,
.event_handler = scic_sds_remote_node_context_resuming_state_event_handler
}, },
[SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE] = { [SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE] = {
.destruct_handler = scic_sds_remote_node_context_general_destruct_handler, .destruct_handler = scic_sds_remote_node_context_general_destruct_handler,
@ -824,7 +572,6 @@ scic_sds_remote_node_context_state_handler_table[] = {
.resume_handler = scic_sds_remote_node_context_default_resume_handler, .resume_handler = scic_sds_remote_node_context_default_resume_handler,
.start_io_handler = scic_sds_remote_node_context_ready_state_start_io_handler, .start_io_handler = scic_sds_remote_node_context_ready_state_start_io_handler,
.start_task_handler = scic_sds_remote_node_context_success_start_task_handler, .start_task_handler = scic_sds_remote_node_context_success_start_task_handler,
.event_handler = scic_sds_remote_node_context_ready_state_event_handler
}, },
[SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE] = { [SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE] = {
.destruct_handler = scic_sds_remote_node_context_general_destruct_handler, .destruct_handler = scic_sds_remote_node_context_general_destruct_handler,
@ -832,7 +579,6 @@ scic_sds_remote_node_context_state_handler_table[] = {
.resume_handler = scic_sds_remote_node_context_tx_suspended_state_resume_handler, .resume_handler = scic_sds_remote_node_context_tx_suspended_state_resume_handler,
.start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler,
.start_task_handler = scic_sds_remote_node_context_suspended_start_task_handler, .start_task_handler = scic_sds_remote_node_context_suspended_start_task_handler,
.event_handler = scic_sds_remote_node_context_default_event_handler
}, },
[SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE] = { [SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE] = {
.destruct_handler = scic_sds_remote_node_context_general_destruct_handler, .destruct_handler = scic_sds_remote_node_context_general_destruct_handler,
@ -840,7 +586,6 @@ scic_sds_remote_node_context_state_handler_table[] = {
.resume_handler = scic_sds_remote_node_context_tx_rx_suspended_state_resume_handler, .resume_handler = scic_sds_remote_node_context_tx_rx_suspended_state_resume_handler,
.start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler,
.start_task_handler = scic_sds_remote_node_context_suspended_start_task_handler, .start_task_handler = scic_sds_remote_node_context_suspended_start_task_handler,
.event_handler = scic_sds_remote_node_context_default_event_handler
}, },
[SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE] = { [SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE] = {
.destruct_handler = scic_sds_remote_node_context_general_destruct_handler, .destruct_handler = scic_sds_remote_node_context_general_destruct_handler,
@ -848,7 +593,6 @@ scic_sds_remote_node_context_state_handler_table[] = {
.resume_handler = scic_sds_remote_node_context_await_suspension_state_resume_handler, .resume_handler = scic_sds_remote_node_context_await_suspension_state_resume_handler,
.start_io_handler = scic_sds_remote_node_context_default_start_io_handler, .start_io_handler = scic_sds_remote_node_context_default_start_io_handler,
.start_task_handler = scic_sds_remote_node_context_await_suspension_state_start_task_handler, .start_task_handler = scic_sds_remote_node_context_await_suspension_state_start_task_handler,
.event_handler = scic_sds_remote_node_context_await_suspension_state_event_handler
} }
}; };
@ -1172,3 +916,110 @@ void scic_sds_remote_node_context_construct(struct scic_sds_remote_node_context
sci_base_state_machine_start(&rnc->state_machine); sci_base_state_machine_start(&rnc->state_machine);
} }
enum sci_status scic_sds_remote_node_context_event_handler(struct scic_sds_remote_node_context *sci_rnc,
u32 event_code)
{
enum scis_sds_remote_node_context_states state;
state = sci_rnc->state_machine.current_state_id;
switch (state) {
case SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE:
switch (scu_get_event_code(event_code)) {
case SCU_EVENT_POST_RNC_COMPLETE:
sci_base_state_machine_change_state(&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE);
break;
default:
goto out;
}
break;
case SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE:
if (scu_get_event_code(event_code) == SCU_EVENT_POST_RNC_INVALIDATE_COMPLETE) {
if (sci_rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL)
state = SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE;
else
state = SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE;
sci_base_state_machine_change_state(&sci_rnc->state_machine,
state);
} else {
switch (scu_get_event_type(event_code)) {
case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
/* We really dont care if the hardware is going to suspend
* the device since it's being invalidated anyway */
dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: SCIC Remote Node Context 0x%p was "
"suspeneded by hardware while being "
"invalidated.\n", __func__, sci_rnc);
break;
default:
goto out;
}
}
break;
case SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE:
if (scu_get_event_code(event_code) == SCU_EVENT_POST_RCN_RELEASE) {
sci_base_state_machine_change_state(&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE);
} else {
switch (scu_get_event_type(event_code)) {
case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
/* We really dont care if the hardware is going to suspend
* the device since it's being resumed anyway */
dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: SCIC Remote Node Context 0x%p was "
"suspeneded by hardware while being resumed.\n",
__func__, sci_rnc);
break;
default:
goto out;
}
}
break;
case SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE:
switch (scu_get_event_type(event_code)) {
case SCU_EVENT_TL_RNC_SUSPEND_TX:
sci_base_state_machine_change_state(&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE);
sci_rnc->suspension_code = scu_get_event_specifier(event_code);
break;
case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
sci_base_state_machine_change_state(&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE);
sci_rnc->suspension_code = scu_get_event_specifier(event_code);
break;
default:
goto out;
}
break;
case SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE:
switch (scu_get_event_type(event_code)) {
case SCU_EVENT_TL_RNC_SUSPEND_TX:
sci_base_state_machine_change_state(&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE);
sci_rnc->suspension_code = scu_get_event_specifier(event_code);
break;
case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
sci_base_state_machine_change_state(&sci_rnc->state_machine,
SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE);
sci_rnc->suspension_code = scu_get_event_specifier(event_code);
break;
default:
goto out;
}
break;
default:
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: invalid state %d\n", __func__, state);
return SCI_FAILURE_INVALID_STATE;
}
return SCI_SUCCESS;
out:
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: code: %#x state: %d\n", __func__, event_code, state);
return SCI_FAILURE;
}

16
drivers/scsi/isci/remote_node_context.h
View file

@ -102,11 +102,6 @@ typedef enum sci_status (*scic_sds_remote_node_context_io_request)(
struct scic_sds_request *sci_req struct scic_sds_request *sci_req
); );
typedef enum sci_status (*scic_sds_remote_node_context_event_handler)(
struct scic_sds_remote_node_context *sci_rnc,
u32 event_code
);
struct scic_sds_remote_node_context_handlers { struct scic_sds_remote_node_context_handlers {
/** /**
* This handle is invoked to stop the RNC. The callback is invoked when after * This handle is invoked to stop the RNC. The callback is invoked when after
@ -138,12 +133,6 @@ struct scic_sds_remote_node_context_handlers {
* operation. * operation.
*/ */
scic_sds_remote_node_context_io_request start_task_handler; scic_sds_remote_node_context_io_request start_task_handler;
/**
* This handler is invoked where there is an RNC event that must be processed.
*/
scic_sds_remote_node_context_event_handler event_handler;
}; };
/** /**
@ -271,8 +260,9 @@ bool scic_sds_remote_node_context_is_ready(
#define scic_sds_remote_node_context_get_remote_node_index(rcn) \ #define scic_sds_remote_node_context_get_remote_node_index(rcn) \
((rnc)->remote_node_index) ((rnc)->remote_node_index)
#define scic_sds_remote_node_context_event_handler(rnc, event_code) \
((rnc)->state_handlers->event_handler(rnc, event_code)) enum sci_status scic_sds_remote_node_context_event_handler(struct scic_sds_remote_node_context *sci_rnc,
u32 event_code);
#define scic_sds_remote_node_context_resume(rnc, callback, parameter) \ #define scic_sds_remote_node_context_resume(rnc, callback, parameter) \
((rnc)->state_handlers->resume_handler(rnc, callback, parameter)) ((rnc)->state_handlers->resume_handler(rnc, callback, parameter))