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sfc: on 8000 series use TX queues for TX timestamps

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For this we create and use one or more new TX queues on the PTP channel,
 and enable sync events for it.
Based on a patch by Martin Habets <mhabets@solarflare.com>.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree
2018-01-25 17:26:06 +00:00
committed by David S. Miller
parent c1d0d33946
commit 2935e3c382
6 changed files with 54 additions and 13 deletions
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3
drivers/net/ethernet/sfc/tx.c
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@@ -842,7 +842,8 @@ void efx_init_tx_queue(struct efx_tx_queue *tx_queue)
tx_queue->old_read_count = 0;
tx_queue->empty_read_count = 0 | EFX_EMPTY_COUNT_VALID;
tx_queue->xmit_more_available = false;
tx_queue->timestamping = false;
tx_queue->timestamping = (efx_ptp_use_mac_tx_timestamps(efx) &&
tx_queue->channel == efx_ptp_channel(efx));
tx_queue->completed_desc_ptr = tx_queue->ptr_mask;
tx_queue->completed_timestamp_major = 0;
tx_queue->completed_timestamp_minor = 0;