diff options
Diffstat (limited to 'drivers/infiniband/hw/hfi1/sdma.c')
-rw-r--r-- | drivers/infiniband/hw/hfi1/sdma.c | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/drivers/infiniband/hw/hfi1/sdma.c b/drivers/infiniband/hw/hfi1/sdma.c index f9befc05b349..0990fba660cf 100644 --- a/drivers/infiniband/hw/hfi1/sdma.c +++ b/drivers/infiniband/hw/hfi1/sdma.c @@ -2086,6 +2086,11 @@ nodesc: * @sde: sdma engine to use * @wait: wait structure to use when full (may be NULL) * @tx_list: list of sdma_txreqs to submit + * @count: pointer to a u32 which, after return will contain the total number of + * sdma_txreqs removed from the tx_list. This will include sdma_txreqs + * whose SDMA descriptors are submitted to the ring and the sdma_txreqs + * which are added to SDMA engine flush list if the SDMA engine state is + * not running. * * The call submits the list into the ring. * @@ -2100,18 +2105,18 @@ nodesc: * side locking. * * Return: - * > 0 - Success (value is number of sdma_txreq's submitted), + * 0 - Success, * -EINVAL - sdma_txreq incomplete, -EBUSY - no space in ring (wait == NULL) * -EIOCBQUEUED - tx queued to iowait, -ECOMM bad sdma state */ int sdma_send_txlist(struct sdma_engine *sde, struct iowait *wait, - struct list_head *tx_list) + struct list_head *tx_list, u32 *count_out) { struct sdma_txreq *tx, *tx_next; int ret = 0; unsigned long flags; u16 tail = INVALID_TAIL; - int count = 0; + u32 submit_count = 0, flush_count = 0, total_count; spin_lock_irqsave(&sde->tail_lock, flags); retry: @@ -2127,33 +2132,34 @@ retry: } list_del_init(&tx->list); tail = submit_tx(sde, tx); - count++; + submit_count++; if (tail != INVALID_TAIL && - (count & SDMA_TAIL_UPDATE_THRESH) == 0) { + (submit_count & SDMA_TAIL_UPDATE_THRESH) == 0) { sdma_update_tail(sde, tail); tail = INVALID_TAIL; } } update_tail: + total_count = submit_count + flush_count; if (wait) - iowait_sdma_add(wait, count); + iowait_sdma_add(wait, total_count); if (tail != INVALID_TAIL) sdma_update_tail(sde, tail); spin_unlock_irqrestore(&sde->tail_lock, flags); - return ret == 0 ? count : ret; + *count_out = total_count; + return ret; unlock_noconn: spin_lock(&sde->flushlist_lock); list_for_each_entry_safe(tx, tx_next, tx_list, list) { tx->wait = wait; list_del_init(&tx->list); - if (wait) - iowait_sdma_inc(wait); tx->next_descq_idx = 0; #ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER tx->sn = sde->tail_sn++; trace_hfi1_sdma_in_sn(sde, tx->sn); #endif list_add_tail(&tx->list, &sde->flushlist); + flush_count++; if (wait) { wait->tx_count++; wait->count += tx->num_desc; |