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sfc: add and use efx_tx_send_pending in tx.c

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Instead of using efx_tx_queue_partner(), which relies on the assumption
 that tx_queues_per_channel is 2, efx_tx_send_pending() iterates over
 txqs with efx_for_each_channel_tx_queue().
We unconditionally set tx_queue->xmit_pending (renamed from
 xmit_more_available), then condition on xmit_more for the call to
 efx_tx_send_pending(), which will clear xmit_pending.  Thus, after an
 xmit_more TX, the doorbell is un-rung and xmit_pending is true.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Edward Cree
2020-09-03 22:34:15 +01:00
committed by Jakub Kicinski
parent 44a8c4f33c
commit 1c0544d249
6 changed files with 44 additions and 41 deletions
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2
drivers/net/ethernet/sfc/ef10.c
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@@ -2367,7 +2367,7 @@ static void efx_ef10_tx_write(struct efx_tx_queue *tx_queue)
unsigned int write_ptr;
efx_qword_t *txd;
tx_queue->xmit_more_available = false;
tx_queue->xmit_pending = false;
if (unlikely(tx_queue->write_count == tx_queue->insert_count))
return;