void SSD_READ(unsigned int length, int32_t sector_nb)
{
FTL_READ(sector_nb, length);
}
void DEQUEUE_IO(void)
{
#ifdef FIRM_IO_BUF_DEBUG
printf("[%s] Start.\n",__FUNCTION__);
#endif
if(e_queue->entry_nb == 0 || e_queue->head == NULL){
printf("ERROR[%s] There is no event. \n", __FUNCTION__);
return;
}
event_queue_entry* e_q_entry = e_queue->head;
int io_type = e_q_entry->io_type;
int valid = e_q_entry->valid;
int32_t sector_nb = e_q_entry->sector_nb;
unsigned int length = e_q_entry->length;
void* buf = e_q_entry->buf;
/* Deallocation event queue entry */
e_queue->entry_nb--;
if(e_queue->entry_nb == 0){
e_queue->head = NULL;
e_queue->tail = NULL;
}
else{
e_queue->head = e_q_entry->next;
}
if(e_q_entry->io_type == WRITE){
free(e_q_entry);
}
else{
if(e_q_entry == last_read_entry){
last_read_entry = NULL;
}
}
if(valid == VALID){
/* Call FTL Function */
if(io_type == READ){
if(buf != NULL){
/* The data is already read from write buffer */
}
else{
/* Allocate read pointer */
e_q_entry->buf = ftl_read_ptr;
FTL_READ(sector_nb, length);
}
}
else if(io_type == WRITE){
FTL_WRITE(sector_nb, length);
}
else{
printf("ERROR[%s] Invalid IO type. \n",__FUNCTION__);
}
}
#ifdef SSD_THREAD
pthread_mutex_lock(&cq_lock);
#endif
if(io_type == READ){
/* Move event queue entry to completed event queue */
e_q_entry->next = NULL;
if(c_e_queue->entry_nb == 0){
c_e_queue->head = e_q_entry;
c_e_queue->tail = e_q_entry;
}
else{
c_e_queue->tail->next = e_q_entry;
c_e_queue->tail = e_q_entry;
}
c_e_queue->entry_nb++;
}
#ifdef SSD_THREAD
pthread_mutex_unlock(&cq_lock);
#endif
#ifdef FIRM_IO_BUF_DEBUG
printf("[%s] End.\n",__FUNCTION__);
#endif
}
