Author: yongari
Date: Tue Nov 22 20:57:06 2011
New Revision: 227837
URL: http://svn.freebsd.org/changeset/base/227837
Log:
Announce flow control capability to underlying PHY driver.
Pause timer value is initialized to 0xFFFF. Controller allows just
4 different TX pause thresholds. The lowest possible threshold
value looks too aggressive so use next available threshold value.
Modified:
head/sys/dev/vge/if_vge.c
Modified: head/sys/dev/vge/if_vge.c
==============================================================================
--- head/sys/dev/vge/if_vge.c Tue Nov 22 20:45:11 2011 (r227836)
+++ head/sys/dev/vge/if_vge.c Tue Nov 22 20:57:06 2011 (r227837)
@@ -1103,7 +1103,7 @@ vge_attach(device_t dev)
/* Do MII setup */
error = mii_attach(dev, &sc->vge_miibus, ifp, vge_ifmedia_upd,
vge_ifmedia_sts, BMSR_DEFCAPMASK, sc->vge_phyaddr, MII_OFFSET_ANY,
- 0);
+ MIIF_DOPAUSE);
if (error != 0) {
device_printf(dev, "attaching PHYs failed\n");
goto fail;
@@ -2112,9 +2112,16 @@ vge_init_locked(struct vge_softc *sc)
vge_rxfilter(sc);
vge_setvlan(sc);
- /* Enable flow control */
-
- CSR_WRITE_1(sc, VGE_CRS2, 0x8B);
+ /* Initialize pause timer. */
+ CSR_WRITE_2(sc, VGE_TX_PAUSE_TIMER, 0xFFFF);
+ /*
+ * Initialize flow control parameters.
+ * TX XON high threshold : 48
+ * TX pause low threshold : 24
+ * Disable hald-duplex flow control
+ */
+ CSR_WRITE_1(sc, VGE_CRC2, 0xFF);
+ CSR_WRITE_1(sc, VGE_CRS2, VGE_CR2_XON_ENABLE | 0x0B);
/* Enable jumbo frame reception (if desired) */
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