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Implement the write twice to send producer index workaround for

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BCM5700 chips as described in the Broadcom Errata documents.

Obtained from:	NetBSD and Broadcom Errata documentation
This commit is contained in:
Paul Saab 2003-05-04 00:07:21 +00:00
parent 9bf327a70c
commit 3927098f93
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=114622
1 changed files with 11 additions and 0 deletions
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11
sys/dev/bge/if_bge.c
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@ -934,8 +934,16 @@ bge_init_tx_ring(sc)
{
sc->bge_txcnt = 0;
sc->bge_tx_saved_considx = 0;
CSR_WRITE_4(sc, BGE_MBX_TX_HOST_PROD0_LO, 0);
/* 5700 b2 errata */
if (BGE_ASICREV(sc->bge_asicrev) == BGE_ASICREV_BCM5700)
CSR_WRITE_4(sc, BGE_MBX_TX_HOST_PROD0_LO, 0);
CSR_WRITE_4(sc, BGE_MBX_TX_NIC_PROD0_LO, 0);
/* 5700 b2 errata */
if (BGE_ASICREV(sc->bge_asicrev) == BGE_ASICREV_BCM5700)
CSR_WRITE_4(sc, BGE_MBX_TX_NIC_PROD0_LO, 0);
return(0);
}
@ -2344,6 +2352,9 @@ bge_start(ifp)
/* Transmit */
CSR_WRITE_4(sc, BGE_MBX_TX_HOST_PROD0_LO, prodidx);
/* 5700 b2 errata */
if (BGE_ASICREV(sc->bge_asicrev) == BGE_ASICREV_BCM5700)
CSR_WRITE_4(sc, BGE_MBX_TX_HOST_PROD0_LO, prodidx);
/*
* Set a timeout in case the chip goes out to lunch.