/*
* ======== bridge_msg_delete_queue ========
* Delete a msg_ctrl queue allocated in bridge_msg_create_queue.
*/
void bridge_msg_delete_queue(struct msg_queue *msg_queue_obj)
{
struct msg_mgr *hmsg_mgr;
u32 io_msg_pend;
if (!msg_queue_obj || !msg_queue_obj->hmsg_mgr)
goto func_end;
hmsg_mgr = msg_queue_obj->hmsg_mgr;
msg_queue_obj->done = true;
/* Unblock all threads blocked in MSG_Get() or MSG_Put(). */
io_msg_pend = msg_queue_obj->io_msg_pend;
while (io_msg_pend) {
/* Unblock thread */
sync_set_event(msg_queue_obj->sync_done);
/* Wait for acknowledgement */
sync_wait_on_event(msg_queue_obj->sync_done_ack, SYNC_INFINITE);
io_msg_pend = msg_queue_obj->io_msg_pend;
}
/* Remove message queue from hmsg_mgr->queue_list */
spin_lock_bh(&hmsg_mgr->msg_mgr_lock);
lst_remove_elem(hmsg_mgr->queue_list,
(struct list_head *)msg_queue_obj);
/* Free the message queue object */
delete_msg_queue(msg_queue_obj, msg_queue_obj->max_msgs);
if (!hmsg_mgr->msg_free_list)
goto func_cont;
if (LST_IS_EMPTY(hmsg_mgr->msg_free_list))
sync_reset_event(hmsg_mgr->sync_event);
func_cont:
spin_unlock_bh(&hmsg_mgr->msg_mgr_lock);
func_end:
return;
}
/*
* ======== bridge_msg_delete_queue ========
* Delete a msg_ctrl queue allocated in bridge_msg_create_queue.
*/
void bridge_msg_delete_queue(struct msg_queue *msg_queue_obj)
{
struct msg_mgr *hmsg_mgr;
u32 io_msg_pend;
if (!msg_queue_obj || !msg_queue_obj->msg_mgr)
return;
hmsg_mgr = msg_queue_obj->msg_mgr;
msg_queue_obj->done = true;
/* Unblock all threads blocked in MSG_Get() or MSG_Put(). */
io_msg_pend = msg_queue_obj->io_msg_pend;
while (io_msg_pend) {
/* Unblock thread */
sync_set_event(msg_queue_obj->sync_done);
/* Wait for acknowledgement */
sync_wait_on_event(msg_queue_obj->sync_done_ack, SYNC_INFINITE);
io_msg_pend = msg_queue_obj->io_msg_pend;
}
/* Remove message queue from hmsg_mgr->queue_list */
spin_lock_bh(&hmsg_mgr->msg_mgr_lock);
list_del(&msg_queue_obj->list_elem);
/* Free the message queue object */
delete_msg_queue(msg_queue_obj, msg_queue_obj->max_msgs);
if (list_empty(&hmsg_mgr->msg_free_list))
sync_reset_event(hmsg_mgr->sync_event);
spin_unlock_bh(&hmsg_mgr->msg_mgr_lock);
}
/*
* ======== bridge_msg_create_queue ========
* Create a msg_queue for sending/receiving messages to/from a node
* on the DSP.
*/
int bridge_msg_create_queue(struct msg_mgr *hmsg_mgr,
OUT struct msg_queue **phMsgQueue,
u32 msgq_id, u32 max_msgs, bhandle arg)
{
u32 i;
u32 num_allocated = 0;
struct msg_queue *msg_q;
int status = 0;
if (!hmsg_mgr || phMsgQueue == NULL || !hmsg_mgr->msg_free_list) {
status = -EFAULT;
goto func_end;
}
*phMsgQueue = NULL;
/* Allocate msg_queue object */
msg_q = kzalloc(sizeof(struct msg_queue), GFP_KERNEL);
if (!msg_q) {
status = -ENOMEM;
goto func_end;
}
lst_init_elem((struct list_head *)msg_q);
msg_q->max_msgs = max_msgs;
msg_q->hmsg_mgr = hmsg_mgr;
msg_q->arg = arg; /* Node handle */
msg_q->msgq_id = msgq_id; /* Node env (not valid yet) */
/* Queues of Message frames for messages from the DSP */
msg_q->msg_free_list = kzalloc(sizeof(struct lst_list), GFP_KERNEL);
msg_q->msg_used_list = kzalloc(sizeof(struct lst_list), GFP_KERNEL);
if (msg_q->msg_free_list == NULL || msg_q->msg_used_list == NULL)
status = -ENOMEM;
else {
INIT_LIST_HEAD(&msg_q->msg_free_list->head);
INIT_LIST_HEAD(&msg_q->msg_used_list->head);
}
/* Create event that will be signalled when a message from
* the DSP is available. */
if (DSP_SUCCEEDED(status)) {
msg_q->sync_event = kzalloc(sizeof(struct sync_object),
GFP_KERNEL);
if (msg_q->sync_event)
sync_init_event(msg_q->sync_event);
else
status = -ENOMEM;
}
/* Create a notification list for message ready notification. */
if (DSP_SUCCEEDED(status)) {
msg_q->ntfy_obj = kmalloc(sizeof(struct ntfy_object),
GFP_KERNEL);
if (msg_q->ntfy_obj)
ntfy_init(msg_q->ntfy_obj);
else
status = -ENOMEM;
}
/* Create events that will be used to synchronize cleanup
* when the object is deleted. sync_done will be set to
* unblock threads in MSG_Put() or MSG_Get(). sync_done_ack
* will be set by the unblocked thread to signal that it
* is unblocked and will no longer reference the object. */
if (DSP_SUCCEEDED(status)) {
msg_q->sync_done = kzalloc(sizeof(struct sync_object),
GFP_KERNEL);
if (msg_q->sync_done)
sync_init_event(msg_q->sync_done);
else
status = -ENOMEM;
}
if (DSP_SUCCEEDED(status)) {
msg_q->sync_done_ack = kzalloc(sizeof(struct sync_object),
GFP_KERNEL);
if (msg_q->sync_done_ack)
sync_init_event(msg_q->sync_done_ack);
else
status = -ENOMEM;
}
if (DSP_SUCCEEDED(status)) {
/* Enter critical section */
spin_lock_bh(&hmsg_mgr->msg_mgr_lock);
/* Initialize message frames and put in appropriate queues */
for (i = 0; i < max_msgs && DSP_SUCCEEDED(status); i++) {
status = add_new_msg(hmsg_mgr->msg_free_list);
if (DSP_SUCCEEDED(status)) {
num_allocated++;
status = add_new_msg(msg_q->msg_free_list);
}
}
if (DSP_FAILED(status)) {
/* Stay inside CS to prevent others from taking any
* of the newly allocated message frames. */
delete_msg_queue(msg_q, num_allocated);
} else {
lst_put_tail(hmsg_mgr->queue_list,
(struct list_head *)msg_q);
*phMsgQueue = msg_q;
/* Signal that free frames are now available */
if (!LST_IS_EMPTY(hmsg_mgr->msg_free_list))
sync_set_event(hmsg_mgr->sync_event);
}
/* Exit critical section */
spin_unlock_bh(&hmsg_mgr->msg_mgr_lock);
} else {
delete_msg_queue(msg_q, 0);
}
func_end:
return status;
}
/*
* ======== bridge_msg_create_queue ========
* Create a msg_queue for sending/receiving messages to/from a node
* on the DSP.
*/
int bridge_msg_create_queue(struct msg_mgr *hmsg_mgr, struct msg_queue **msgq,
u32 msgq_id, u32 max_msgs, void *arg)
{
u32 i;
u32 num_allocated = 0;
struct msg_queue *msg_q;
int status = 0;
if (!hmsg_mgr || msgq == NULL)
return -EFAULT;
*msgq = NULL;
/* Allocate msg_queue object */
msg_q = kzalloc(sizeof(struct msg_queue), GFP_KERNEL);
if (!msg_q)
return -ENOMEM;
msg_q->max_msgs = max_msgs;
msg_q->msg_mgr = hmsg_mgr;
msg_q->arg = arg; /* Node handle */
msg_q->msgq_id = msgq_id; /* Node env (not valid yet) */
/* Queues of Message frames for messages from the DSP */
INIT_LIST_HEAD(&msg_q->msg_free_list);
INIT_LIST_HEAD(&msg_q->msg_used_list);
/* Create event that will be signalled when a message from
* the DSP is available. */
msg_q->sync_event = kzalloc(sizeof(struct sync_object), GFP_KERNEL);
if (!msg_q->sync_event) {
status = -ENOMEM;
goto out_err;
}
sync_init_event(msg_q->sync_event);
/* Create a notification list for message ready notification. */
msg_q->ntfy_obj = kmalloc(sizeof(struct ntfy_object), GFP_KERNEL);
if (!msg_q->ntfy_obj) {
status = -ENOMEM;
goto out_err;
}
ntfy_init(msg_q->ntfy_obj);
/* Create events that will be used to synchronize cleanup
* when the object is deleted. sync_done will be set to
* unblock threads in MSG_Put() or MSG_Get(). sync_done_ack
* will be set by the unblocked thread to signal that it
* is unblocked and will no longer reference the object. */
msg_q->sync_done = kzalloc(sizeof(struct sync_object), GFP_KERNEL);
if (!msg_q->sync_done) {
status = -ENOMEM;
goto out_err;
}
sync_init_event(msg_q->sync_done);
msg_q->sync_done_ack = kzalloc(sizeof(struct sync_object), GFP_KERNEL);
if (!msg_q->sync_done_ack) {
status = -ENOMEM;
goto out_err;
}
sync_init_event(msg_q->sync_done_ack);
/* Enter critical section */
spin_lock_bh(&hmsg_mgr->msg_mgr_lock);
/* Initialize message frames and put in appropriate queues */
for (i = 0; i < max_msgs && !status; i++) {
status = add_new_msg(&hmsg_mgr->msg_free_list);
if (!status) {
num_allocated++;
status = add_new_msg(&msg_q->msg_free_list);
}
}
if (status) {
spin_unlock_bh(&hmsg_mgr->msg_mgr_lock);
goto out_err;
}
list_add_tail(&msg_q->list_elem, &hmsg_mgr->queue_list);
*msgq = msg_q;
/* Signal that free frames are now available */
if (!list_empty(&hmsg_mgr->msg_free_list))
sync_set_event(hmsg_mgr->sync_event);
/* Exit critical section */
spin_unlock_bh(&hmsg_mgr->msg_mgr_lock);
return 0;
out_err:
delete_msg_queue(msg_q, num_allocated);
return status;
}
