MFC: 279183

sfxge: add common code support for changing TX queue pace

To delay packets from a particular TX queue by a particular time, write a value
into the TX Pace table s.t. pace time <= TX Pace Clock Period * (2 ^ pace value)
- the TX pace clock is 1/13 of the system clock, so its period should be 104 or
52 ns depending on whether turbo mode is active.

EFX_TX_PACE_CLOCK_BASE added by me.

Submitted by:   Mark Spender <mspender at solarflare.com>
Sponsored by:   Solarflare Communications, Inc.
Approved by:    gnn (mentor)

1 files changed, 5 insertions, 0 deletions

diff --git a/sys/dev/sfxge/common/efx.h b/sys/dev/sfxge/common/efx.h
index c5f832f..c5ef448 100644
--- a/sys/dev/sfxge/common/efx.h
+++ b/sys/dev/sfxge/common/efx.h
@@ -1736,6 +1736,11 @@ efx_tx_qpost(
 	__in		unsigned int completed,
 	__inout		unsigned int *addedp);
 
+extern	__checkReturn	int
+efx_tx_qpace(
+	__in		efx_txq_t *etp,
+	__in		unsigned int ns);
+
 extern		void
 efx_tx_qpush(
 	__in	efx_txq_t *etp,