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Don't rely on GM_GP_CTRL register contents when mii(4) layer reports

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link state changes. Instead, build new speed/duplex/flow-control
settings from the values reported from PHY.
This should fix speed/duplex/flow-control mismatches between GMAC and
PHY which resulted in very poor Rx performance due to lots of
out-of-order packet delivery.

Reported by:	Arno J. Klaassen <arno AT heho DOT snv DOT jussieu DOT fr>
Tested by:	Arno J. Klaassen <arno AT heho DOT snv DOT jussieu DOT fr>
This commit is contained in:
Pyun YongHyeon 2007-01-08 00:58:00 +00:00
parent 30dd6af310
commit bf59599fcb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=165883
1 changed files with 14 additions and 19 deletions
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33
sys/dev/msk/if_msk.c
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@ -445,7 +445,7 @@ msk_link_task(void *arg, int pending)
struct msk_if_softc *sc_if;
struct mii_data *mii;
struct ifnet *ifp;
uint32_t gmac, ane;
uint32_t gmac;
sc_if = (struct msk_if_softc *)arg;
sc = sc_if->msk_softc;
@ -465,42 +465,36 @@ msk_link_task(void *arg, int pending)
} else
sc_if->msk_link = 0;
gmac = GMAC_READ_2(sc, sc_if->msk_port, GM_GP_CTRL);
ane = 0;
if (sc_if->msk_link != 0) {
/* Enable Tx FIFO Underrun. */
CSR_WRITE_1(sc, MR_ADDR(sc_if->msk_port, GMAC_IRQ_MSK),
GM_IS_TX_FF_UR | GM_IS_RX_FF_OR);
/*
* Because mii(4) notify msk(4) that it detected link status
* change, there is no need to enable automatic
* speed/flow-control/duplex updates.
*/
gmac = GM_GPCR_AU_ALL_DIS;
switch (IFM_SUBTYPE(mii->mii_media_active)) {
case IFM_AUTO:
ane = 1;
break;
case IFM_1000_SX:
case IFM_1000_T:
gmac &= ~GM_GPCR_SPEED_100;
gmac |= GM_GPCR_SPEED_1000;
break;
case IFM_100_TX:
gmac |= GM_GPCR_SPEED_100;
gmac &= ~GM_GPCR_SPEED_1000;
break;
case IFM_10_T:
gmac &= ~(GM_GPCR_SPEED_100 | GM_GPCR_SPEED_1000);
break;
}
if (ane == 0)
gmac |= GM_GPCR_AU_ALL_DIS;
else
gmac &= ~GM_GPCR_AU_ALL_DIS;
if (((mii->mii_media_active & IFM_GMASK) & IFM_FDX) != 0)
gmac |= GM_GPCR_DUP_FULL;
/* Enable Rx flow control. */
if (((mii->mii_media_active & IFM_GMASK) & IFM_FLAG0) != 0)
gmac &= ~GM_GPCR_FC_RX_DIS;
/* Enable Tx flow control. */
if (((mii->mii_media_active & IFM_GMASK) & IFM_FLAG1) != 0)
gmac &= ~GM_GPCR_FC_TX_DIS;
/* Disable Rx flow control. */
if (((mii->mii_media_active & IFM_GMASK) & IFM_FLAG0) == 0)
gmac |= GM_GPCR_FC_RX_DIS;
/* Disable Tx flow control. */
if (((mii->mii_media_active & IFM_GMASK) & IFM_FLAG1) == 0)
gmac |= GM_GPCR_FC_TX_DIS;
gmac |= GM_GPCR_RX_ENA | GM_GPCR_TX_ENA;
GMAC_WRITE_2(sc, sc_if->msk_port, GM_GP_CTRL, gmac);
/* Read again to ensure writing. */
@ -530,6 +524,7 @@ msk_link_task(void *arg, int pending)
msk_phy_writereg(sc_if, PHY_ADDR_MARV,
PHY_MARV_INT_MASK, 0);
/* Disable Rx/Tx MAC. */
gmac = GMAC_READ_2(sc, sc_if->msk_port, GM_GP_CTRL);
gmac &= ~(GM_GPCR_RX_ENA | GM_GPCR_TX_ENA);
GMAC_WRITE_2(sc, sc_if->msk_port, GM_GP_CTRL, gmac);
/* Read again to ensure writing. */