Author: yongari
Date: Tue Dec 13 20:26:46 2011
New Revision: 228479
URL: http://svn.freebsd.org/changeset/base/228479
Log:
BCM5720 performance tweak from Broadcom.
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 >
Modified:
head/sys/dev/bge/if_bge.c
head/sys/dev/bge/if_bgereg.h
Modified: head/sys/dev/bge/if_bge.c
==============================================================================
--- head/sys/dev/bge/if_bge.c Tue Dec 13 19:39:24 2011 (r228478)
+++ head/sys/dev/bge/if_bge.c Tue Dec 13 20:26:46 2011 (r228479)
@@ -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);
Modified: head/sys/dev/bge/if_bgereg.h
==============================================================================
--- head/sys/dev/bge/if_bgereg.h Tue Dec 13 19:39:24 2011
(r228478)
+++ head/sys/dev/bge/if_bgereg.h Tue Dec 13 20:26:46 2011
(r228479)
@@ -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
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