Author: arybchik
Date: Wed Mar 25 13:12:15 2015
New Revision: 280589
URL: https://svnweb.freebsd.org/changeset/base/280589
Log:
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)
Modified:
stable/10/sys/dev/sfxge/common/efx.h
stable/10/sys/dev/sfxge/common/efx_regs.h
stable/10/sys/dev/sfxge/common/efx_tx.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/dev/sfxge/common/efx.h
==============================================================================
--- stable/10/sys/dev/sfxge/common/efx.h Wed Mar 25 13:11:19 2015
(r280588)
+++ stable/10/sys/dev/sfxge/common/efx.h Wed Mar 25 13:12:15 2015
(r280589)
@@ -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,
Modified: stable/10/sys/dev/sfxge/common/efx_regs.h
==============================================================================
--- stable/10/sys/dev/sfxge/common/efx_regs.h Wed Mar 25 13:11:19 2015
(r280588)
+++ stable/10/sys/dev/sfxge/common/efx_regs.h Wed Mar 25 13:12:15 2015
(r280589)
@@ -34,6 +34,13 @@ extern "C" {
#endif
+/**************************************************************************
+ *
+ * Falcon/Siena registers and descriptors
+ *
+ **************************************************************************
+ */
+
/*
* FR_AB_EE_VPD_CFG0_REG_SF(128bit):
* SPI/VPD configuration register 0
@@ -3838,6 +3845,18 @@ extern "C" {
#define FSF_AZ_DRIVER_EV_RX_DESCQ_ID_WIDTH 12
+
+/**************************************************************************
+ *
+ * Falcon non-volatile configuration
+ *
+ **************************************************************************
+ */
+
+
+#define FR_AZ_TX_PACE_TBL_OFST FR_BZ_TX_PACE_TBL_OFST
+
+
#ifdef __cplusplus
}
#endif
Modified: stable/10/sys/dev/sfxge/common/efx_tx.c
==============================================================================
--- stable/10/sys/dev/sfxge/common/efx_tx.c Wed Mar 25 13:11:19 2015
(r280588)
+++ stable/10/sys/dev/sfxge/common/efx_tx.c Wed Mar 25 13:12:15 2015
(r280589)
@@ -224,6 +224,53 @@ efx_tx_qpush(
etp->et_index, &dword, B_FALSE);
}
+#define EFX_MAX_PACE_VALUE 20
+#define EFX_TX_PACE_CLOCK_BASE 104
+
+ __checkReturn int
+efx_tx_qpace(
+ __in efx_txq_t *etp,
+ __in unsigned int ns)
+{
+ efx_nic_t *enp = etp->et_enp;
+ efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
+ efx_oword_t oword;
+ unsigned int pace_val;
+ unsigned int timer_period;
+ int rc;
+
+ EFSYS_ASSERT3U(etp->et_magic, ==, EFX_TXQ_MAGIC);
+
+ if (ns == 0) {
+ pace_val = 0;
+ } else {
+ /*
+ * The pace_val to write into the table is s.t
+ * ns <= timer_period * (2 ^ pace_val)
+ */
+ timer_period = EFX_TX_PACE_CLOCK_BASE / encp->enc_clk_mult;
+ for (pace_val = 1; pace_val <= EFX_MAX_PACE_VALUE; pace_val++) {
+ if ((timer_period << pace_val) >= ns)
+ break;
+ }
+ }
+ if (pace_val > EFX_MAX_PACE_VALUE) {
+ rc = EINVAL;
+ goto fail1;
+ }
+
+ /* Update the pacing table */
+ EFX_POPULATE_OWORD_1(oword, FRF_AZ_TX_PACE, pace_val);
+ EFX_BAR_TBL_WRITEO(enp, FR_AZ_TX_PACE_TBL, etp->et_index, &oword);
+
+ return (0);
+
+fail1:
+ EFSYS_PROBE1(fail1, int, rc);
+
+ return (rc);
+}
+
void
efx_tx_qflush(
__in efx_txq_t *etp)
@@ -234,6 +281,8 @@ efx_tx_qflush(
EFSYS_ASSERT3U(etp->et_magic, ==, EFX_TXQ_MAGIC);
+ efx_tx_qpace(etp, 0);
+
label = etp->et_index;
/* Flush the queue */
_______________________________________________
svn-src-all@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
