uint32_t llm_noq_lock_make_req (bdbm_drv_info_t* bdi, bdbm_llm_req_t* llm_req)
{
uint32_t ret;
uint64_t punit_id;
struct bdbm_llm_noq_lock_private* p;
static uint64_t cnt = 0;
p = (struct bdbm_llm_noq_lock_private*)BDBM_LLM_PRIV(bdi);
/* get a parallel unit ID */
punit_id = llm_req->phyaddr.punit_id;
/* wait until a parallel unit becomes idle */
bdbm_sema_lock (&p->punit_locks[punit_id]);
if (cnt % 50000 == 0) {
bdbm_msg ("llm_make_req: %llu", cnt);
}
cnt++;
pmu_update_sw (bdi, llm_req);
/* send a request to a device manager */
ret = bdi->ptr_dm_inf->make_req (bdi, llm_req);
/* handle error cases */
if (ret != 0) {
/* complete a lock */
bdbm_sema_unlock (&p->punit_locks[punit_id]);
bdbm_error ("llm_make_req failed");
}
return ret;
}
uint32_t llm_rmq_make_req (h4h_drv_info_t* bdi, h4h_llm_req_t* r)
{
uint32_t ret;
uint64_t punit_id;
struct h4h_llm_rmq_private* p = (struct h4h_llm_rmq_private*)H4H_LLM_PRIV(bdi);
/* FIXME: ugry */
rd_prior_iotype_t type;
if (r->req_type == REQTYPE_READ ||
r->req_type == REQTYPE_READ_DUMMY ||
r->req_type == REQTYPE_RMW_READ ||
r->req_type == REQTYPE_GC_READ ||
r->req_type == REQTYPE_META_READ) {
type = RD_PRIORITY_READ;
} else {
type = RD_PRIORITY_WRITE;
}
#if defined(ENABLE_SEQ_DBG)
h4h_sema_lock (&p->dbg_seq);
#endif
/* obtain the elapsed time taken by FTL algorithms */
pmu_update_sw (bdi, r);
/* get a parallel unit ID */
punit_id = r->phyaddr->punit_id;
while (h4h_rd_prior_queue_get_nr_items (p->q) >= 96) {
/*yield ();*/
h4h_thread_yield ();
}
/* put a request into Q */
#if defined(QUICK_FIX_FOR_RWM)
if (r->req_type == REQTYPE_RMW_READ) {
/* FIXME: this is a quick fix to support RMW; it must be improved later */
/* step 1: put READ first */
if ((ret = h4h_rd_prior_queue_enqueue (p->q, punit_id, r->lpa, (void*)r, type))) {
h4h_msg ("h4h_prior_queue_enqueue failed");
}
/* step 2: put WRITE second with the same LPA */
punit_id = r->phyaddr_w.punit_id;
if ((ret = h4h_rd_prior_queue_enqueue (p->q, punit_id, r->lpa, (void*)r, type))) {
h4h_msg ("h4h_prior_queue_enqueue failed");
}
} else {
if ((ret = h4h_rd_prior_queue_enqueue (p->q, punit_id, r->lpa, (void*)r, type))) {
h4h_msg ("h4h_prior_queue_enqueue failed");
}
}
#else
if ((ret = h4h_rd_prior_queue_enqueue (p->q, punit_id, r->lpa, (void*)r, type))) {
h4h_msg ("h4h_prior_queue_enqueue failed");
}
#endif
/* wake up thread if it sleeps */
h4h_thread_wakeup (p->llm_thread);
return ret;
}