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BCM5720 performance tweak from Broadcom.

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o Allow multiple outstanding read requests from non-LSO read DMA engine.
 o Allow 4KB burst length reads for non-LSO frames.
 o Enable 512B burst length reads for buffer descriptors.

Submitted by:	Geans Pin < geanspin <> broadcom dot com >
This commit is contained in:
Pyun YongHyeon 2011-12-13 20:26:46 +00:00
parent 867cb545da
commit e3215f766e
2 changed files with 18 additions and 3 deletions
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20
sys/dev/bge/if_bge.c
View File

@ -2080,9 +2080,15 @@ bge_blockinit(struct bge_softc *sc)
val |= BGE_RDMAMODE_TSO6_ENABLE;
}
if (sc->bge_asicrev == BGE_ASICREV_BCM5720)
if (sc->bge_asicrev == BGE_ASICREV_BCM5720) {
val |= CSR_READ_4(sc, BGE_RDMA_MODE) &
BGE_RDMAMODE_H2BNC_VLAN_DET;
/*
* Allow multiple outstanding read requests from
* non-LSO read DMA engine.
*/
val &= ~BGE_RDMAMODE_MULT_DMA_RD_DIS;
}
if (sc->bge_asicrev == BGE_ASICREV_BCM5761 ||
sc->bge_asicrev == BGE_ASICREV_BCM5784 ||
@ -2112,12 +2118,20 @@ bge_blockinit(struct bge_softc *sc)
BGE_RDMA_RSRVCTRL_FIFO_OFLW_FIX);
}
if (sc->bge_asicrev == BGE_ASICREV_BCM5719 ||
sc->bge_asicrev == BGE_ASICREV_BCM5720) {
if (sc->bge_asicrev == BGE_ASICREV_BCM5719) {
CSR_WRITE_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL,
CSR_READ_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL) |
BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_BD_4K |
BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_LSO_4K);
} else if (sc->bge_asicrev == BGE_ASICREV_BCM5720) {
/*
* Allow 4KB burst length reads for non-LSO frames.
* Enable 512B burst length reads for buffer descriptors.
*/
CSR_WRITE_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL,
CSR_READ_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL) |
BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_BD_512 |
BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_LSO_4K);
}
CSR_WRITE_4(sc, BGE_RDMA_MODE, val);

1
sys/dev/bge/if_bgereg.h
View File

@ -1573,6 +1573,7 @@
#define BGE_RDMA_RSRVCTRL_FIFO_HWM_MASK 0x000FF000
#define BGE_RDMA_RSRVCTRL_TXMRGN_MASK 0xFFE00000
#define BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_BD_512 0x00020000
#define BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_BD_4K 0x00030000
#define BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_LSO_4K 0x000C0000