diff -urp bge.orig/if_bge.c bge/if_bge.c
--- bge.orig/if_bge.c	2008-07-06 14:55:37 +0800
+++ bge/if_bge.c	2008-07-06 14:58:50 +0800
@@ -1738,8 +1738,10 @@ bge_blockinit(struct bge_softc *sc)
 	CSR_WRITE_4(sc, BGE_WDMA_MODE, val);
 
 	/* Turn on read DMA state machine */
-	CSR_WRITE_4(sc, BGE_RDMA_MODE,
-	    BGE_RDMAMODE_ENABLE | BGE_RDMAMODE_ALL_ATTNS);
+	val = BGE_RDMAMODE_ENABLE | BGE_RDMAMODE_ALL_ATTNS;
+	if (sc->bge_flags & BGE_FLAG_PCIE)
+		val |= BGE_RDMAMODE_FIFO_LONG_BURST;
+	CSR_WRITE_4(sc, BGE_RDMA_MODE, val);
 
 	/* Turn on RX data completion state machine */
 	CSR_WRITE_4(sc, BGE_RDC_MODE, BGE_RDCMODE_ENABLE);
diff -urp bge.orig/if_bgereg.h bge/if_bgereg.h
--- bge.orig/if_bgereg.h	2008-07-06 14:55:56 +0800
+++ bge/if_bgereg.h	2008-07-06 14:57:16 +0800
@@ -1359,6 +1359,8 @@
 #define	BGE_RDMAMODE_PCI_FIFOOREAD_ATTN	0x00000100
 #define	BGE_RDMAMODE_LOCWRITE_TOOBIG	0x00000200
 #define	BGE_RDMAMODE_ALL_ATTNS		0x000003FC
+#define BGE_RDMAMODE_FIFO_SIZE_128	0x00020000
+#define BGE_RDMAMODE_FIFO_LONG_BURST	0x00030000
 
 /* Read DMA status register */
 #define	BGE_RDMASTAT_PCI_TGT_ABRT_ATTN	0x00000004