static void
WCTS_PALWriteCallback
(
WCTS_ControlBlockType* pWCTSCb
)
{
wpt_list_node* pNode;
WCTS_BufferType* pBufferQueue;
void* pBuffer;
int len;
int available;
int written;
if ((NULL == pWCTSCb) || (WCTS_CB_MAGIC != pWCTSCb->wctsMagic)) {
WPAL_TRACE(eWLAN_MODULE_DAL_CTRL, eWLAN_PAL_TRACE_LEVEL_ERROR,
"WCTS_PALWriteCallback: Invalid parameter received.");
return;
}
if (WCTS_STATE_DEFERRED != pWCTSCb->wctsState) {
return;
}
while (eWLAN_PAL_STATUS_SUCCESS ==
wpal_list_peek_front(&pWCTSCb->wctsPendingQueue, &pNode)) {
pBufferQueue = container_of(pNode, WCTS_BufferType, node);
pBuffer = pBufferQueue->pBuffer;
len = pBufferQueue->bufferSize;
available = smd_write_avail(pWCTSCb->wctsChannel);
if (available < len) {
return;
}
wpal_list_remove_front(&pWCTSCb->wctsPendingQueue, &pNode);
written = smd_write(pWCTSCb->wctsChannel, pBuffer, len);
if (written != len) {
WPAL_TRACE(eWLAN_MODULE_DAL_CTRL, eWLAN_PAL_TRACE_LEVEL_ERROR,
"WCTS_PALWriteCallback: channel write failure");
}
wpalMemoryFree(pBuffer);
wpalMemoryFree(pBufferQueue);
}
pWCTSCb->wctsState = WCTS_STATE_OPEN;
smd_disable_read_intr(pWCTSCb->wctsChannel);
}
/**
@brief Callback function for serializing WCTS Write
processing in the control context
@param pWCTSCb WCTS Control Block
@see
@return void
*/
static void
WCTS_PALWriteCallback
(
WCTS_ControlBlockType* pWCTSCb
)
{
wpt_list_node* pNode;
WCTS_BufferType* pBufferQueue;
void* pBuffer;
int len;
int available;
int written;
/*- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/*--------------------------------------------------------------------
Sanity check
--------------------------------------------------------------------*/
if ((NULL == pWCTSCb) || (WCTS_CB_MAGIC != pWCTSCb->wctsMagic)) {
WPAL_TRACE(eWLAN_MODULE_DAL_CTRL, eWLAN_PAL_TRACE_LEVEL_ERROR,
"WCTS_PALWriteCallback: Invalid parameter received.");
return;
}
/* if we are not deferred, then there are no pending packets */
if (WCTS_STATE_DEFERRED != pWCTSCb->wctsState) {
return;
}
/* Keep sending deferred messages as long as there is room in
the channel. Note that we initially peek at the head of the
list to access the parameters for the next message; we don't
actually remove the next message from the deferred list until
we know the channel can handle it */
while (eWLAN_PAL_STATUS_SUCCESS ==
wpal_list_peek_front(&pWCTSCb->wctsPendingQueue, &pNode)) {
pBufferQueue = container_of(pNode, WCTS_BufferType, node);
pBuffer = pBufferQueue->pBuffer;
len = pBufferQueue->bufferSize;
available = smd_write_avail(pWCTSCb->wctsChannel);
if (available < len) {
/* channel has no room for the next packet so we are done */
return;
}
/* there is room for the next message, so we can now remove
it from the deferred message queue and send it */
wpal_list_remove_front(&pWCTSCb->wctsPendingQueue, &pNode);
/* note that pNode will be the same as when we peeked, so
there is no need to update pBuffer or len */
written = smd_write(pWCTSCb->wctsChannel, pBuffer, len);
if (written != len) {
/* Something went wrong */
WPAL_TRACE(eWLAN_MODULE_DAL_CTRL, eWLAN_PAL_TRACE_LEVEL_ERROR,
"WCTS_PALWriteCallback: channel write failure");
/* we were unable to send the message that was at the head
of the deferred list. there is nothing else we can do
other than drop it, so we will just fall through to the
"success" processing.
hopefully the client can recover from this since there is
nothing else we can do here */
}
/* whether we had success or failure, reclaim all memory */
wpalMemoryFree(pBuffer);
wpalMemoryFree(pBufferQueue);
/* we'll continue to iterate until the channel is full or all
of the deferred messages have been sent */
}
/* if we've exited the loop, then we have drained the deferred queue.
set the state to indicate we are no longer deferred, and turn off
the remote read interrupt */
pWCTSCb->wctsState = WCTS_STATE_OPEN;
smd_disable_read_intr(pWCTSCb->wctsChannel);
} /*WCTS_PALWriteCallback*/
