From: Felix Fietkau <nbd@openwrt.org>
Date: Thu, 7 Dec 2006 21:42:03 +0000 (+0000)
Subject: add 64 bit dma support to broadcom-wl, fixes wrt300n wifi support
X-Git-Tag: reboot~30318
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=aae28d712063583e53d6cc10c973a5df54b7a61b;p=openwrt%2Fstaging%2Fchunkeey.git

add 64 bit dma support to broadcom-wl, fixes wrt300n wifi support

SVN-Revision: 5717
---

diff --git a/package/broadcom-wl/src/kmod/Makefile b/package/broadcom-wl/src/kmod/Makefile
index 450700f5ce..0a16bdcec0 100644
--- a/package/broadcom-wl/src/kmod/Makefile
+++ b/package/broadcom-wl/src/kmod/Makefile
@@ -11,7 +11,7 @@
 #
 # $Id: Makefile,v 1.2 2005/03/29 03:32:18 mbm Exp $
 
-EXTRA_CFLAGS += -I$(TOPDIR)/arch/mips/bcm947xx/include -DBCMDRIVER
+EXTRA_CFLAGS += -I$(TOPDIR)/arch/mips/bcm947xx/include -DBCMDRIVER=1 -DBCMDMA64=1
 
 O_TARGET	:= wl$(MOD_NAME).o
 
diff --git a/package/broadcom-wl/src/kmod/hnddma.c b/package/broadcom-wl/src/kmod/hnddma.c
index 4336560888..1b79dff4c2 100644
--- a/package/broadcom-wl/src/kmod/hnddma.c
+++ b/package/broadcom-wl/src/kmod/hnddma.c
@@ -94,6 +94,14 @@ typedef struct dma_info {
 	uint		dataoffsethigh;	/*   high 32 bits */
 } dma_info_t;
 
+#ifdef BCMDMA64
+#define	DMA64_ENAB(di)	((di)->dma64)
+#define DMA64_CAP	TRUE
+#else
+#define	DMA64_ENAB(di)	(0)
+#define DMA64_CAP	FALSE
+#endif
+
 /* descriptor bumping macros */
 #define	XXD(x, n)	((x) & ((n) - 1))	/* faster than %, but n must be power of 2 */
 #define	TXD(x)		XXD((x), di->ntxd)
@@ -114,7 +122,7 @@ typedef struct dma_info {
 
 /* common prototypes */
 static bool _dma_isaddrext(dma_info_t *di);
-static bool dma32_alloc(dma_info_t *di, uint direction);
+static bool _dma_alloc(dma_info_t *di, uint direction);
 static void _dma_detach(dma_info_t *di);
 static void _dma_ddtable_init(dma_info_t *di, uint direction, ulong pa);
 static void _dma_rxinit(dma_info_t *di);
@@ -129,7 +137,7 @@ static void _dma_txunblock(dma_info_t *di);
 static uint _dma_txactive(dma_info_t *di);
 
 static void* _dma_peeknexttxp(dma_info_t *di);
-static uintptr _dma_getvar(dma_info_t *di, char *name);
+static uintptr _dma_getvar(dma_info_t *di, const char *name);
 static void _dma_counterreset(dma_info_t *di);
 static void _dma_fifoloopbackenable(dma_info_t *di);
 
@@ -154,6 +162,94 @@ static bool dma32_rxstopped(dma_info_t *di);
 static bool dma32_rxenabled(dma_info_t *di);
 static bool _dma32_addrext(osl_t *osh, dma32regs_t *dma32regs);
 
+/* ** 64 bit DMA prototypes and stubs */
+#ifdef BCMDMA64
+static bool dma64_alloc(dma_info_t *di, uint direction);
+static bool dma64_txreset(dma_info_t *di);
+static bool dma64_rxreset(dma_info_t *di);
+static bool dma64_txsuspendedidle(dma_info_t *di);
+static int  dma64_txfast(dma_info_t *di, void *p0, bool commit);
+static void *dma64_getnexttxp(dma_info_t *di, bool forceall);
+static void *dma64_getnextrxp(dma_info_t *di, bool forceall);
+static void dma64_txrotate(dma_info_t *di);
+
+static bool dma64_rxidle(dma_info_t *di);
+static void dma64_txinit(dma_info_t *di);
+static bool dma64_txenabled(dma_info_t *di);
+static void dma64_txsuspend(dma_info_t *di);
+static void dma64_txresume(dma_info_t *di);
+static bool dma64_txsuspended(dma_info_t *di);
+static void dma64_txreclaim(dma_info_t *di, bool forceall);
+static bool dma64_txstopped(dma_info_t *di);
+static bool dma64_rxstopped(dma_info_t *di);
+static bool dma64_rxenabled(dma_info_t *di);
+static bool _dma64_addrext(osl_t *osh, dma64regs_t *dma64regs);
+
+#else
+static bool dma64_alloc(dma_info_t *di, uint direction) { return FALSE; }
+static bool dma64_txreset(dma_info_t *di) { return FALSE; }
+static bool dma64_rxreset(dma_info_t *di) { return FALSE; }
+static bool dma64_txsuspendedidle(dma_info_t *di) { return FALSE;}
+static int  dma64_txfast(dma_info_t *di, void *p0, bool commit) { return 0; }
+static void *dma64_getnexttxp(dma_info_t *di, bool forceall) { return NULL; }
+static void *dma64_getnextrxp(dma_info_t *di, bool forceall) { return NULL; }
+static void dma64_txrotate(dma_info_t *di) { return; }
+
+static bool dma64_rxidle(dma_info_t *di) { return FALSE; }
+static void dma64_txinit(dma_info_t *di) { return; }
+static bool dma64_txenabled(dma_info_t *di) { return FALSE; }
+static void dma64_txsuspend(dma_info_t *di) { return; }
+static void dma64_txresume(dma_info_t *di) { return; }
+static bool dma64_txsuspended(dma_info_t *di) {return FALSE; }
+static void dma64_txreclaim(dma_info_t *di, bool forceall) { return; }
+static bool dma64_txstopped(dma_info_t *di) { return FALSE; }
+static bool dma64_rxstopped(dma_info_t *di) { return FALSE; }
+static bool dma64_rxenabled(dma_info_t *di) { return FALSE; }
+static bool _dma64_addrext(osl_t *osh, dma64regs_t *dma64regs) { return FALSE; }
+
+#endif	/* BCMDMA64 */
+
+
+
+static di_fcn_t dma64proc = {
+	(di_detach_t)_dma_detach,
+	(di_txinit_t)dma64_txinit,
+	(di_txreset_t)dma64_txreset,
+	(di_txenabled_t)dma64_txenabled,
+	(di_txsuspend_t)dma64_txsuspend,
+	(di_txresume_t)dma64_txresume,
+	(di_txsuspended_t)dma64_txsuspended,
+	(di_txsuspendedidle_t)dma64_txsuspendedidle,
+	(di_txfast_t)dma64_txfast,
+	(di_txstopped_t)dma64_txstopped,
+	(di_txreclaim_t)dma64_txreclaim,
+	(di_getnexttxp_t)dma64_getnexttxp,
+	(di_peeknexttxp_t)_dma_peeknexttxp,
+	(di_txblock_t)_dma_txblock,
+	(di_txunblock_t)_dma_txunblock,
+	(di_txactive_t)_dma_txactive,
+	(di_txrotate_t)dma64_txrotate,
+
+	(di_rxinit_t)_dma_rxinit,
+	(di_rxreset_t)dma64_rxreset,
+	(di_rxidle_t)dma64_rxidle,
+	(di_rxstopped_t)dma64_rxstopped,
+	(di_rxenable_t)_dma_rxenable,
+	(di_rxenabled_t)dma64_rxenabled,
+	(di_rx_t)_dma_rx,
+	(di_rxfill_t)_dma_rxfill,
+	(di_rxreclaim_t)_dma_rxreclaim,
+	(di_getnextrxp_t)_dma_getnextrxp,
+
+	(di_fifoloopbackenable_t)_dma_fifoloopbackenable,
+	(di_getvar_t)_dma_getvar,
+	(di_counterreset_t)_dma_counterreset,
+
+	NULL,
+	NULL,
+	NULL,
+	34
+};
 
 static di_fcn_t dma32proc = {
 	(di_detach_t)_dma_detach,
@@ -212,6 +308,16 @@ dma_attach(osl_t *osh, char *name, sb_t *sbh, void *dmaregstx, void *dmaregsrx,
 
 	/* old chips w/o sb is no longer supported */
 	ASSERT(sbh != NULL);
+	
+	di->dma64 = ((sb_coreflagshi(sbh, 0, 0) & SBTMH_DMA64) == SBTMH_DMA64);
+
+#ifndef BCMDMA64
+	if (di->dma64) {
+		DMA_ERROR(("dma_attach: driver doesn't have the capability to support "
+		           "64 bits DMA\n"));
+		goto fail;
+	}
+#endif
 
 	/* check arguments */
 	ASSERT(ISPOWEROF2(ntxd));
@@ -223,14 +329,27 @@ dma_attach(osl_t *osh, char *name, sb_t *sbh, void *dmaregstx, void *dmaregsrx,
 
 
 	/* init dma reg pointer */
-	ASSERT(ntxd <= D32MAXDD);
-	ASSERT(nrxd <= D32MAXDD);
-	di->d32txregs = (dma32regs_t *)dmaregstx;
-	di->d32rxregs = (dma32regs_t *)dmaregsrx;
+	if (di->dma64) {
+		ASSERT(ntxd <= D64MAXDD);
+		ASSERT(nrxd <= D64MAXDD);
+		di->d64txregs = (dma64regs_t *)dmaregstx;
+		di->d64rxregs = (dma64regs_t *)dmaregsrx;
+
+		di->dma64align = D64RINGALIGN;
+		if ((ntxd < D64MAXDD / 2) && (nrxd < D64MAXDD / 2)) {
+			/* for smaller dd table, HW relax the alignment requirement */
+			di->dma64align = D64RINGALIGN / 2;
+		}
+	} else {
+		ASSERT(ntxd <= D32MAXDD);
+		ASSERT(nrxd <= D32MAXDD);
+		di->d32txregs = (dma32regs_t *)dmaregstx;
+		di->d32rxregs = (dma32regs_t *)dmaregsrx;
+	}
 
 	DMA_TRACE(("%s: dma_attach: %s osh %p ntxd %d nrxd %d rxbufsize %d nrxpost %d "
 	           "rxoffset %d dmaregstx %p dmaregsrx %p\n",
-	           name, "DMA32", osh, ntxd, nrxd, rxbufsize,
+	           name, (di->dma64 ? "DMA64" : "DMA32"), osh, ntxd, nrxd, rxbufsize,
 	           nrxpost, rxoffset, dmaregstx, dmaregsrx));
 
 	/* make a private copy of our callers name */
@@ -265,8 +384,15 @@ dma_attach(osl_t *osh, char *name, sb_t *sbh, void *dmaregstx, void *dmaregsrx,
 	di->dataoffsetlow = 0;
 	/* for pci bus, add offset */
 	if (sbh->bustype == PCI_BUS) {
-		di->ddoffsetlow = SB_PCI_DMA;
-		di->ddoffsethigh = 0;
+		if ((sbh->buscoretype == SB_PCIE) && di->dma64) {
+			/* pcie with DMA64 */
+			di->ddoffsetlow = 0;
+			di->ddoffsethigh = SB_PCIE_DMA_H32;
+		} else {
+			/* pci(DMA32/DMA64) or pcie with DMA32 */
+			di->ddoffsetlow = SB_PCI_DMA;
+			di->ddoffsethigh = 0;
+		}
 		di->dataoffsetlow =  di->ddoffsetlow;
 		di->dataoffsethigh =  di->ddoffsethigh;
 	}
@@ -301,13 +427,13 @@ dma_attach(osl_t *osh, char *name, sb_t *sbh, void *dmaregstx, void *dmaregsrx,
 
 	/* allocate transmit descriptor ring, only need ntxd descriptors but it must be aligned */
 	if (ntxd) {
-		if (!dma32_alloc(di, DMA_TX))
+		if (!_dma_alloc(di, DMA_TX))
 			goto fail;
 	}
 
 	/* allocate receive descriptor ring, only need nrxd descriptors but it must be aligned */
 	if (nrxd) {
-		if (!dma32_alloc(di, DMA_RX))
+		if (!_dma_alloc(di, DMA_RX))
 			goto fail;
 	}
 
@@ -348,7 +474,7 @@ dma_attach(osl_t *osh, char *name, sb_t *sbh, void *dmaregstx, void *dmaregsrx,
 		di->rxp_dmah = NULL;
 
 	/* initialize opsvec of function pointers */
-	di->hnddma.di_fn = dma32proc;
+	di->hnddma.di_fn = DMA64_ENAB(di) ? dma64proc : dma32proc;
 
 	return ((hnddma_t *)di);
 
@@ -381,6 +507,34 @@ dma32_dd_upd(dma_info_t *di, dma32dd_t *ddring, ulong pa, uint outidx, uint32 *f
 	}
 }
 
+static INLINE void
+dma64_dd_upd(dma_info_t *di, dma64dd_t *ddring, ulong pa, uint outidx, uint32 *flags,
+             uint32 bufcount)
+{
+	uint32 ctrl2 = bufcount & D64_CTRL2_BC_MASK;
+
+	/* PCI bus with big(>1G) physical address, use address extension */
+	if ((di->dataoffsetlow != SB_PCI_DMA) || !(pa & PCI32ADDR_HIGH)) {
+		W_SM(&ddring[outidx].addrlow, BUS_SWAP32(pa + di->dataoffsetlow));
+		W_SM(&ddring[outidx].addrhigh, BUS_SWAP32(0 + di->dataoffsethigh));
+		W_SM(&ddring[outidx].ctrl1, BUS_SWAP32(*flags));
+		W_SM(&ddring[outidx].ctrl2, BUS_SWAP32(ctrl2));
+	} else {
+		/* address extension */
+		uint32 ae;
+		ASSERT(di->addrext);
+
+		ae = (pa & PCI32ADDR_HIGH) >> PCI32ADDR_HIGH_SHIFT;
+		pa &= ~PCI32ADDR_HIGH;
+
+		ctrl2 |= (ae << D64_CTRL2_AE_SHIFT) & D64_CTRL2_AE;
+		W_SM(&ddring[outidx].addrlow, BUS_SWAP32(pa + di->dataoffsetlow));
+		W_SM(&ddring[outidx].addrhigh, BUS_SWAP32(0 + di->dataoffsethigh));
+		W_SM(&ddring[outidx].ctrl1, BUS_SWAP32(*flags));
+		W_SM(&ddring[outidx].ctrl2, BUS_SWAP32(ctrl2));
+	}
+}
+
 static bool
 _dma32_addrext(osl_t *osh, dma32regs_t *dma32regs)
 {
@@ -392,6 +546,16 @@ _dma32_addrext(osl_t *osh, dma32regs_t *dma32regs)
 	return ((w & XC_AE) == XC_AE);
 }
 
+static bool
+_dma_alloc(dma_info_t *di, uint direction)
+{
+	if (DMA64_ENAB(di)) {
+		return dma64_alloc(di, direction);
+	} else {
+		return dma32_alloc(di, direction);
+	}
+}
+
 /* !! may be called with core in reset */
 static void
 _dma_detach(dma_info_t *di)
@@ -406,12 +570,21 @@ _dma_detach(dma_info_t *di)
 	ASSERT(di->rxin == di->rxout);
 
 	/* free dma descriptor rings */
-	if (di->txd32)
-		DMA_FREE_CONSISTENT(di->osh, ((int8*)di->txd32 - di->txdalign),
-		                    di->txdalloc, (di->txdpa - di->txdalign), &di->tx_dmah);
-	if (di->rxd32)
-		DMA_FREE_CONSISTENT(di->osh, ((int8*)di->rxd32 - di->rxdalign),
-		                    di->rxdalloc, (di->rxdpa - di->rxdalign), &di->rx_dmah);
+	if (DMA64_ENAB(di)) {
+		if (di->txd64)
+			DMA_FREE_CONSISTENT(di->osh, ((int8*)(uintptr)di->txd64 - di->txdalign),
+			                    di->txdalloc, (di->txdpa - di->txdalign), &di->tx_dmah);
+		if (di->rxd64)
+			DMA_FREE_CONSISTENT(di->osh, ((int8*)(uintptr)di->rxd64 - di->rxdalign),
+			                    di->rxdalloc, (di->rxdpa - di->rxdalign), &di->rx_dmah);
+	} else {
+		if (di->txd32)
+			DMA_FREE_CONSISTENT(di->osh, ((int8*)(uintptr)di->txd32 - di->txdalign),
+			                    di->txdalloc, (di->txdpa - di->txdalign), &di->tx_dmah);
+		if (di->rxd32)
+			DMA_FREE_CONSISTENT(di->osh, ((int8*)(uintptr)di->rxd32 - di->rxdalign),
+			                    di->rxdalloc, (di->rxdpa - di->rxdalign), &di->rx_dmah);
+	}
 
 	/* free packet pointer vectors */
 	if (di->txp)
@@ -436,7 +609,27 @@ _dma_detach(dma_info_t *di)
 static bool
 _dma_isaddrext(dma_info_t *di)
 {
-	if (di->d32txregs)
+	if (DMA64_ENAB(di)) {
+		/* DMA64 supports full 32 bits or 64 bits. AE is always valid */
+
+		/* not all tx or rx channel are available */
+		if (di->d64txregs != NULL) {
+			if (!_dma64_addrext(di->osh, di->d64txregs)) {
+				DMA_ERROR(("%s: _dma_isaddrext: DMA64 tx doesn't have AE set\n",
+					di->name));
+				ASSERT(0);
+			}
+			return TRUE;
+		} else if (di->d64rxregs != NULL) {
+			if (!_dma64_addrext(di->osh, di->d64rxregs)) {
+				DMA_ERROR(("%s: _dma_isaddrext: DMA64 rx doesn't have AE set\n",
+					di->name));
+				ASSERT(0);
+			}
+			return TRUE;
+		}
+		return FALSE;
+	} else if (di->d32txregs)
 		return (_dma32_addrext(di->osh, di->d32txregs));
 	else if (di->d32rxregs)
 		return (_dma32_addrext(di->osh, di->d32rxregs));
@@ -447,26 +640,60 @@ _dma_isaddrext(dma_info_t *di)
 static void
 _dma_ddtable_init(dma_info_t *di, uint direction, ulong pa)
 {
-	if ((di->ddoffsetlow != SB_PCI_DMA) || !(pa & PCI32ADDR_HIGH)) {
-		if (direction == DMA_TX)
-			W_REG(di->osh, &di->d32txregs->addr, (pa + di->ddoffsetlow));
-		else
-			W_REG(di->osh, &di->d32rxregs->addr, (pa + di->ddoffsetlow));
-	} else {
-		/* dma32 address extension */
-		uint32 ae;
-		ASSERT(di->addrext);
-
-		/* shift the high bit(s) from pa to ae */
-		ae = (pa & PCI32ADDR_HIGH) >> PCI32ADDR_HIGH_SHIFT;
-		pa &= ~PCI32ADDR_HIGH;
+	if (DMA64_ENAB(di)) {
+
+		if ((di->ddoffsetlow != SB_PCI_DMA) || !(pa & PCI32ADDR_HIGH)) {
+			if (direction == DMA_TX) {
+				W_REG(di->osh, &di->d64txregs->addrlow, (pa + di->ddoffsetlow));
+				W_REG(di->osh, &di->d64txregs->addrhigh, di->ddoffsethigh);
+			} else {
+				W_REG(di->osh, &di->d64rxregs->addrlow, (pa + di->ddoffsetlow));
+				W_REG(di->osh, &di->d64rxregs->addrhigh, di->ddoffsethigh);
+			}
+		} else {
+			/* DMA64 32bits address extension */
+			uint32 ae;
+			ASSERT(di->addrext);
+
+			/* shift the high bit(s) from pa to ae */
+			ae = (pa & PCI32ADDR_HIGH) >> PCI32ADDR_HIGH_SHIFT;
+			pa &= ~PCI32ADDR_HIGH;
+
+			if (direction == DMA_TX) {
+				W_REG(di->osh, &di->d64txregs->addrlow, (pa + di->ddoffsetlow));
+				W_REG(di->osh, &di->d64txregs->addrhigh, di->ddoffsethigh);
+				SET_REG(di->osh, &di->d64txregs->control, D64_XC_AE,
+					(ae << D64_XC_AE_SHIFT));
+			} else {
+				W_REG(di->osh, &di->d64rxregs->addrlow, (pa + di->ddoffsetlow));
+				W_REG(di->osh, &di->d64rxregs->addrhigh, di->ddoffsethigh);
+				SET_REG(di->osh, &di->d64rxregs->control, D64_RC_AE,
+					(ae << D64_RC_AE_SHIFT));
+			}
+		}
 
-		if (direction == DMA_TX) {
-			W_REG(di->osh, &di->d32txregs->addr, (pa + di->ddoffsetlow));
-			SET_REG(di->osh, &di->d32txregs->control, XC_AE, ae <<XC_AE_SHIFT);
+	} else {
+		if ((di->ddoffsetlow != SB_PCI_DMA) || !(pa & PCI32ADDR_HIGH)) {
+			if (direction == DMA_TX)
+				W_REG(di->osh, &di->d32txregs->addr, (pa + di->ddoffsetlow));
+			else
+				W_REG(di->osh, &di->d32rxregs->addr, (pa + di->ddoffsetlow));
 		} else {
-			W_REG(di->osh, &di->d32rxregs->addr, (pa + di->ddoffsetlow));
-			SET_REG(di->osh, &di->d32rxregs->control, RC_AE, ae <<RC_AE_SHIFT);
+			/* dma32 address extension */
+			uint32 ae;
+			ASSERT(di->addrext);
+
+			/* shift the high bit(s) from pa to ae */
+			ae = (pa & PCI32ADDR_HIGH) >> PCI32ADDR_HIGH_SHIFT;
+			pa &= ~PCI32ADDR_HIGH;
+
+			if (direction == DMA_TX) {
+				W_REG(di->osh, &di->d32txregs->addr, (pa + di->ddoffsetlow));
+				SET_REG(di->osh, &di->d32txregs->control, XC_AE, ae <<XC_AE_SHIFT);
+			} else {
+				W_REG(di->osh, &di->d32rxregs->addr, (pa + di->ddoffsetlow));
+				SET_REG(di->osh, &di->d32rxregs->control, RC_AE, ae <<RC_AE_SHIFT);
+			}
 		}
 	}
 }
@@ -475,7 +702,10 @@ static void
 _dma_fifoloopbackenable(dma_info_t *di)
 {
 	DMA_TRACE(("%s: dma_fifoloopbackenable\n", di->name));
-	OR_REG(di->osh, &di->d32txregs->control, XC_LE);
+	if (DMA64_ENAB(di))
+		OR_REG(di->osh, &di->d64txregs->control, D64_XC_LE);
+	else
+		OR_REG(di->osh, &di->d32txregs->control, XC_LE);
 }
 
 static void
@@ -489,9 +719,15 @@ _dma_rxinit(dma_info_t *di)
 	di->rxin = di->rxout = 0;
 
 	/* clear rx descriptor ring */
-	BZERO_SM((void *)di->rxd32, (di->nrxd * sizeof(dma32dd_t)));
-	_dma_rxenable(di);
-	_dma_ddtable_init(di, DMA_RX, di->rxdpa);
+	if (DMA64_ENAB(di)) {
+		BZERO_SM((void *)(uintptr)di->rxd64, (di->nrxd * sizeof(dma64dd_t)));
+		_dma_rxenable(di);
+		_dma_ddtable_init(di, DMA_RX, di->rxdpa);
+	} else {
+		BZERO_SM((void *)(uintptr)di->rxd32, (di->nrxd * sizeof(dma32dd_t)));
+		_dma_rxenable(di);
+		_dma_ddtable_init(di, DMA_RX, di->rxdpa);
+	}
 }
 
 static void
@@ -499,7 +735,11 @@ _dma_rxenable(dma_info_t *di)
 {
 	DMA_TRACE(("%s: dma_rxenable\n", di->name));
 
-	W_REG(di->osh, &di->d32rxregs->control, ((di->rxoffset << RC_RO_SHIFT) | RC_RE));
+	if (DMA64_ENAB(di))
+		W_REG(di->osh, &di->d64rxregs->control,
+		      ((di->rxoffset << D64_RC_RO_SHIFT) | D64_RC_RE));
+	else
+		W_REG(di->osh, &di->d32rxregs->control, ((di->rxoffset << RC_RO_SHIFT) | RC_RE));
 }
 
 /* !! rx entry routine, returns a pointer to the next frame received,
@@ -602,16 +842,28 @@ _dma_rxfill(dma_info_t *di)
 
 		/* reset flags for each descriptor */
 		flags = 0;
-		if (rxout == (di->nrxd - 1))
-			flags = CTRL_EOT;
-		dma32_dd_upd(di, di->rxd32, pa, rxout, &flags, di->rxbufsize);
+		if (DMA64_ENAB(di)) {
+			if (rxout == (di->nrxd - 1))
+				flags = D64_CTRL1_EOT;
+
+			dma64_dd_upd(di, di->rxd64, pa, rxout, &flags, di->rxbufsize);
+		} else {
+			if (rxout == (di->nrxd - 1))
+				flags = CTRL_EOT;
+
+			dma32_dd_upd(di, di->rxd32, pa, rxout, &flags, di->rxbufsize);
+		}
 		rxout = NEXTRXD(rxout);
 	}
 
 	di->rxout = rxout;
 
 	/* update the chip lastdscr pointer */
-	W_REG(di->osh, &di->d32rxregs->ptr, I2B(rxout, dma32dd_t));
+	if (DMA64_ENAB(di)) {
+		W_REG(di->osh, &di->d64rxregs->ptr, I2B(rxout, dma64dd_t));
+	} else {
+		W_REG(di->osh, &di->d32rxregs->ptr, I2B(rxout, dma32dd_t));
+	}
 }
 
 /* like getnexttxp but no reclaim */
@@ -623,7 +875,11 @@ _dma_peeknexttxp(dma_info_t *di)
 	if (di->ntxd == 0)
 		return (NULL);
 
-	end = B2I(R_REG(di->osh, &di->d32txregs->status) & XS_CD_MASK, dma32dd_t);
+	if (DMA64_ENAB(di)) {
+		end = B2I(R_REG(di->osh, &di->d64txregs->status0) & D64_XS0_CD_MASK, dma64dd_t);
+	} else {
+		end = B2I(R_REG(di->osh, &di->d32txregs->status) & XS_CD_MASK, dma32dd_t);
+	}
 
 	for (i = di->txin; i != end; i = NEXTTXD(i))
 		if (di->txp[i])
@@ -654,7 +910,11 @@ _dma_getnextrxp(dma_info_t *di, bool forceall)
 	if (di->nrxd == 0)
 		return (NULL);
 
-	return dma32_getnextrxp(di, forceall);
+	if (DMA64_ENAB(di)) {
+		return dma64_getnextrxp(di, forceall);
+	} else {
+		return dma32_getnextrxp(di, forceall);
+	}
 }
 
 static void
@@ -686,7 +946,7 @@ _dma_counterreset(dma_info_t *di)
 
 /* get the address of the var in order to change later */
 static uintptr
-_dma_getvar(dma_info_t *di, char *name)
+_dma_getvar(dma_info_t *di, const char *name)
 {
 	if (!strcmp(name, "&txavail"))
 		return ((uintptr) &(di->hnddma.txavail));
@@ -717,7 +977,7 @@ dma32_txinit(dma_info_t *di)
 	di->hnddma.txavail = di->ntxd - 1;
 
 	/* clear tx descriptor ring */
-	BZERO_SM((void *)di->txd32, (di->ntxd * sizeof(dma32dd_t)));
+	BZERO_SM((void *)(uintptr)di->txd32, (di->ntxd * sizeof(dma32dd_t)));
 	W_REG(di->osh, &di->d32txregs->control, XC_XE);
 	_dma_ddtable_init(di, DMA_TX, di->txdpa);
 }
@@ -806,7 +1066,7 @@ dma32_alloc(dma_info_t *di, uint direction)
 		}
 
 		di->txd32 = (dma32dd_t *) ROUNDUP((uintptr)va, D32RINGALIGN);
-		di->txdalign = (uint)((int8*)di->txd32 - (int8*)va);
+		di->txdalign = (uint)((int8*)(uintptr)di->txd32 - (int8*)va);
 		di->txdpa += di->txdalign;
 		di->txdalloc = size;
 		ASSERT(ISALIGNED((uintptr)di->txd32, D32RINGALIGN));
@@ -817,7 +1077,7 @@ dma32_alloc(dma_info_t *di, uint direction)
 			return FALSE;
 		}
 		di->rxd32 = (dma32dd_t *) ROUNDUP((uintptr)va, D32RINGALIGN);
-		di->rxdalign = (uint)((int8*)di->rxd32 - (int8*)va);
+		di->rxdalign = (uint)((int8*)(uintptr)di->rxd32 - (int8*)va);
 		di->rxdpa += di->rxdalign;
 		di->rxdalloc = size;
 		ASSERT(ISALIGNED((uintptr)di->rxd32, D32RINGALIGN));
@@ -1134,6 +1394,461 @@ dma32_txrotate(dma_info_t *di)
 	W_REG(di->osh, &di->d32txregs->ptr, I2B(di->txout, dma32dd_t));
 }
 
+/* 64 bits DMA functions */
+
+#ifdef BCMDMA64
+static void
+dma64_txinit(dma_info_t *di)
+{
+	DMA_TRACE(("%s: dma_txinit\n", di->name));
+
+	if (di->ntxd == 0)
+		return;
+
+	di->txin = di->txout = 0;
+	di->hnddma.txavail = di->ntxd - 1;
+
+	/* clear tx descriptor ring */
+	BZERO_SM((void *)(uintptr)di->txd64, (di->ntxd * sizeof(dma64dd_t)));
+	W_REG(di->osh, &di->d64txregs->control, D64_XC_XE);
+	_dma_ddtable_init(di, DMA_TX, di->txdpa);
+}
+
+static bool
+dma64_txenabled(dma_info_t *di)
+{
+	uint32 xc;
+
+	/* If the chip is dead, it is not enabled :-) */
+	xc = R_REG(di->osh, &di->d64txregs->control);
+	return ((xc != 0xffffffff) && (xc & D64_XC_XE));
+}
+
+static void
+dma64_txsuspend(dma_info_t *di)
+{
+	DMA_TRACE(("%s: dma_txsuspend\n", di->name));
+
+	if (di->ntxd == 0)
+		return;
+
+	OR_REG(di->osh, &di->d64txregs->control, D64_XC_SE);
+}
+
+static void
+dma64_txresume(dma_info_t *di)
+{
+	DMA_TRACE(("%s: dma_txresume\n", di->name));
+
+	if (di->ntxd == 0)
+		return;
+
+	AND_REG(di->osh, &di->d64txregs->control, ~D64_XC_SE);
+}
+
+static bool
+dma64_txsuspended(dma_info_t *di)
+{
+	return (di->ntxd == 0) || ((R_REG(di->osh, &di->d64txregs->control) & D64_XC_SE)
+	        == D64_XC_SE);
+}
+
+static void
+dma64_txreclaim(dma_info_t *di, bool forceall)
+{
+	void *p;
+
+	DMA_TRACE(("%s: dma_txreclaim %s\n", di->name, forceall ? "all" : ""));
+
+	while ((p = dma64_getnexttxp(di, forceall)))
+		PKTFREE(di->osh, p, TRUE);
+}
+
+static bool
+dma64_txstopped(dma_info_t *di)
+{
+	return ((R_REG(di->osh, &di->d64txregs->status0) & D64_XS0_XS_MASK) == D64_XS0_XS_STOPPED);
+}
+
+static bool
+dma64_rxstopped(dma_info_t *di)
+{
+	return ((R_REG(di->osh, &di->d64rxregs->status0) & D64_RS0_RS_MASK) == D64_RS0_RS_STOPPED);
+}
+
+static bool
+dma64_alloc(dma_info_t *di, uint direction)
+{
+	uint size;
+	uint ddlen;
+	uint32 alignbytes;
+	void *va;
+
+	ddlen = sizeof(dma64dd_t);
+
+	size = (direction == DMA_TX) ? (di->ntxd * ddlen) : (di->nrxd * ddlen);
+
+	alignbytes = di->dma64align;
+
+	if (!ISALIGNED(DMA_CONSISTENT_ALIGN, alignbytes))
+		size += alignbytes;
+
+	if (direction == DMA_TX) {
+		if ((va = DMA_ALLOC_CONSISTENT(di->osh, size, &di->txdpa, &di->tx_dmah)) == NULL) {
+			DMA_ERROR(("%s: dma_attach: DMA_ALLOC_CONSISTENT(ntxd) failed\n",
+			           di->name));
+			return FALSE;
+		}
+
+		di->txd64 = (dma64dd_t *) ROUNDUP((uintptr)va, alignbytes);
+		di->txdalign = (uint)((int8*)(uintptr)di->txd64 - (int8*)va);
+		di->txdpa += di->txdalign;
+		di->txdalloc = size;
+		ASSERT(ISALIGNED((uintptr)di->txd64, alignbytes));
+	} else {
+		if ((va = DMA_ALLOC_CONSISTENT(di->osh, size, &di->rxdpa, &di->rx_dmah)) == NULL) {
+			DMA_ERROR(("%s: dma_attach: DMA_ALLOC_CONSISTENT(nrxd) failed\n",
+			           di->name));
+			return FALSE;
+		}
+		di->rxd64 = (dma64dd_t *) ROUNDUP((uintptr)va, alignbytes);
+		di->rxdalign = (uint)((int8*)(uintptr)di->rxd64 - (int8*)va);
+		di->rxdpa += di->rxdalign;
+		di->rxdalloc = size;
+		ASSERT(ISALIGNED((uintptr)di->rxd64, alignbytes));
+	}
+
+	return TRUE;
+}
+
+static bool
+dma64_txreset(dma_info_t *di)
+{
+	uint32 status;
+
+	if (di->ntxd == 0)
+		return TRUE;
+
+	/* suspend tx DMA first */
+	W_REG(di->osh, &di->d64txregs->control, D64_XC_SE);
+	SPINWAIT(((status = (R_REG(di->osh, &di->d64txregs->status0) & D64_XS0_XS_MASK)) !=
+	          D64_XS0_XS_DISABLED) &&
+	         (status != D64_XS0_XS_IDLE) &&
+	         (status != D64_XS0_XS_STOPPED),
+	         10000);
+
+	W_REG(di->osh, &di->d64txregs->control, 0);
+	SPINWAIT(((status = (R_REG(di->osh, &di->d64txregs->status0) & D64_XS0_XS_MASK)) !=
+	          D64_XS0_XS_DISABLED),
+	         10000);
+
+	/* wait for the last transaction to complete */
+	OSL_DELAY(300);
+
+	return (status == D64_XS0_XS_DISABLED);
+}
+
+static bool
+dma64_rxidle(dma_info_t *di)
+{
+	DMA_TRACE(("%s: dma_rxidle\n", di->name));
+
+	if (di->nrxd == 0)
+		return TRUE;
+
+	return ((R_REG(di->osh, &di->d64rxregs->status0) & D64_RS0_CD_MASK) ==
+		R_REG(di->osh, &di->d64rxregs->ptr));
+}
+
+static bool
+dma64_rxreset(dma_info_t *di)
+{
+	uint32 status;
+
+	if (di->nrxd == 0)
+		return TRUE;
+
+	W_REG(di->osh, &di->d64rxregs->control, 0);
+	SPINWAIT(((status = (R_REG(di->osh, &di->d64rxregs->status0) & D64_RS0_RS_MASK)) !=
+	          D64_RS0_RS_DISABLED),
+	         10000);
+
+	return (status == D64_RS0_RS_DISABLED);
+}
+
+static bool
+dma64_rxenabled(dma_info_t *di)
+{
+	uint32 rc;
+
+	rc = R_REG(di->osh, &di->d64rxregs->control);
+	return ((rc != 0xffffffff) && (rc & D64_RC_RE));
+}
+
+static bool
+dma64_txsuspendedidle(dma_info_t *di)
+{
+
+	if (di->ntxd == 0)
+		return TRUE;
+
+	if (!(R_REG(di->osh, &di->d64txregs->control) & D64_XC_SE))
+		return 0;
+
+	if ((R_REG(di->osh, &di->d64txregs->status0) & D64_XS0_XS_MASK) == D64_XS0_XS_IDLE)
+		return 1;
+
+	return 0;
+}
+
+
+/* !! tx entry routine */
+static int
+dma64_txfast(dma_info_t *di, void *p0, bool commit)
+{
+	void *p, *next;
+	uchar *data;
+	uint len;
+	uint txout;
+	uint32 flags = 0;
+	uint32 pa;
+
+	DMA_TRACE(("%s: dma_txfast\n", di->name));
+
+	txout = di->txout;
+
+	/*
+	 * Walk the chain of packet buffers
+	 * allocating and initializing transmit descriptor entries.
+	 */
+	for (p = p0; p; p = next) {
+		data = PKTDATA(di->osh, p);
+		len = PKTLEN(di->osh, p);
+		next = PKTNEXT(di->osh, p);
+
+		/* return nonzero if out of tx descriptors */
+		if (NEXTTXD(txout) == di->txin)
+			goto outoftxd;
+
+		if (len == 0)
+			continue;
+
+		/* get physical address of buffer start */
+		pa = (uint32) DMA_MAP(di->osh, data, len, DMA_TX, p);
+
+		flags = 0;
+		if (p == p0)
+			flags |= D64_CTRL1_SOF;
+		if (next == NULL)
+			flags |= (D64_CTRL1_IOC | D64_CTRL1_EOF);
+		if (txout == (di->ntxd - 1))
+			flags |= D64_CTRL1_EOT;
+
+		dma64_dd_upd(di, di->txd64, pa, txout, &flags, len);
+		ASSERT(di->txp[txout] == NULL);
+
+		txout = NEXTTXD(txout);
+	}
+
+	/* if last txd eof not set, fix it */
+	if (!(flags & D64_CTRL1_EOF))
+		W_SM(&di->txd64[PREVTXD(txout)].ctrl1,
+		     BUS_SWAP32(flags | D64_CTRL1_IOC | D64_CTRL1_EOF));
+
+	/* save the packet */
+	di->txp[PREVTXD(txout)] = p0;
+
+	/* bump the tx descriptor index */
+	di->txout = txout;
+
+	/* kick the chip */
+	if (commit)
+		W_REG(di->osh, &di->d64txregs->ptr, I2B(txout, dma64dd_t));
+
+	/* tx flow control */
+	di->hnddma.txavail = di->ntxd - NTXDACTIVE(di->txin, di->txout) - 1;
+
+	return (0);
+
+outoftxd:
+	DMA_ERROR(("%s: dma_txfast: out of txds\n", di->name));
+	PKTFREE(di->osh, p0, TRUE);
+	di->hnddma.txavail = 0;
+	di->hnddma.txnobuf++;
+	return (-1);
+}
+
+/*
+ * Reclaim next completed txd (txds if using chained buffers) and
+ * return associated packet.
+ * If 'force' is true, reclaim txd(s) and return associated packet
+ * regardless of the value of the hardware "curr" pointer.
+ */
+static void *
+dma64_getnexttxp(dma_info_t *di, bool forceall)
+{
+	uint start, end, i;
+	void *txp;
+
+	DMA_TRACE(("%s: dma_getnexttxp %s\n", di->name, forceall ? "all" : ""));
+
+	if (di->ntxd == 0)
+		return (NULL);
+
+	txp = NULL;
+
+	start = di->txin;
+	if (forceall)
+		end = di->txout;
+	else
+		end = B2I(R_REG(di->osh, &di->d64txregs->status0) & D64_XS0_CD_MASK, dma64dd_t);
+
+	if ((start == 0) && (end > di->txout))
+		goto bogus;
+
+	for (i = start; i != end && !txp; i = NEXTTXD(i)) {
+		DMA_UNMAP(di->osh, (BUS_SWAP32(R_SM(&di->txd64[i].addrlow)) - di->dataoffsetlow),
+		          (BUS_SWAP32(R_SM(&di->txd64[i].ctrl2)) & D64_CTRL2_BC_MASK),
+		          DMA_TX, di->txp[i]);
+
+		W_SM(&di->txd64[i].addrlow, 0xdeadbeef);
+		W_SM(&di->txd64[i].addrhigh, 0xdeadbeef);
+
+		txp = di->txp[i];
+		di->txp[i] = NULL;
+	}
+
+	di->txin = i;
+
+	/* tx flow control */
+	di->hnddma.txavail = di->ntxd - NTXDACTIVE(di->txin, di->txout) - 1;
+
+	return (txp);
+
+bogus:
+/*
+	DMA_ERROR(("dma_getnexttxp: bogus curr: start %d end %d txout %d force %d\n",
+		start, end, di->txout, forceall));
+*/
+	return (NULL);
+}
+
+static void *
+dma64_getnextrxp(dma_info_t *di, bool forceall)
+{
+	uint i;
+	void *rxp;
+
+	/* if forcing, dma engine must be disabled */
+	ASSERT(!forceall || !dma64_rxenabled(di));
+
+	i = di->rxin;
+
+	/* return if no packets posted */
+	if (i == di->rxout)
+		return (NULL);
+
+	/* ignore curr if forceall */
+	if (!forceall &&
+	    (i == B2I(R_REG(di->osh, &di->d64rxregs->status0) & D64_RS0_CD_MASK, dma64dd_t)))
+		return (NULL);
+
+	/* get the packet pointer that corresponds to the rx descriptor */
+	rxp = di->rxp[i];
+	ASSERT(rxp);
+	di->rxp[i] = NULL;
+
+	/* clear this packet from the descriptor ring */
+	DMA_UNMAP(di->osh, (BUS_SWAP32(R_SM(&di->rxd64[i].addrlow)) - di->dataoffsetlow),
+	          di->rxbufsize, DMA_RX, rxp);
+
+	W_SM(&di->rxd64[i].addrlow, 0xdeadbeef);
+	W_SM(&di->rxd64[i].addrhigh, 0xdeadbeef);
+
+	di->rxin = NEXTRXD(i);
+
+	return (rxp);
+}
+
+static bool
+_dma64_addrext(osl_t *osh, dma64regs_t *dma64regs)
+{
+	uint32 w;
+	OR_REG(osh, &dma64regs->control, D64_XC_AE);
+	w = R_REG(osh, &dma64regs->control);
+	AND_REG(osh, &dma64regs->control, ~D64_XC_AE);
+	return ((w & D64_XC_AE) == D64_XC_AE);
+}
+
+/*
+ * Rotate all active tx dma ring entries "forward" by (ActiveDescriptor - txin).
+ */
+static void
+dma64_txrotate(dma_info_t *di)
+{
+	uint ad;
+	uint nactive;
+	uint rot;
+	uint old, new;
+	uint32 w;
+	uint first, last;
+
+	ASSERT(dma64_txsuspendedidle(di));
+
+	nactive = _dma_txactive(di);
+	ad = B2I((R_REG(di->osh, &di->d64txregs->status1) & D64_XS1_AD_MASK), dma64dd_t);
+	rot = TXD(ad - di->txin);
+
+	ASSERT(rot < di->ntxd);
+
+	/* full-ring case is a lot harder - don't worry about this */
+	if (rot >= (di->ntxd - nactive)) {
+		DMA_ERROR(("%s: dma_txrotate: ring full - punt\n", di->name));
+		return;
+	}
+
+	first = di->txin;
+	last = PREVTXD(di->txout);
+
+	/* move entries starting at last and moving backwards to first */
+	for (old = last; old != PREVTXD(first); old = PREVTXD(old)) {
+		new = TXD(old + rot);
+
+		/*
+		 * Move the tx dma descriptor.
+		 * EOT is set only in the last entry in the ring.
+		 */
+		w = BUS_SWAP32(R_SM(&di->txd64[old].ctrl1)) & ~D64_CTRL1_EOT;
+		if (new == (di->ntxd - 1))
+			w |= D64_CTRL1_EOT;
+		W_SM(&di->txd64[new].ctrl1, BUS_SWAP32(w));
+
+		w = BUS_SWAP32(R_SM(&di->txd64[old].ctrl2));
+		W_SM(&di->txd64[new].ctrl2, BUS_SWAP32(w));
+
+		W_SM(&di->txd64[new].addrlow, R_SM(&di->txd64[old].addrlow));
+		W_SM(&di->txd64[new].addrhigh, R_SM(&di->txd64[old].addrhigh));
+
+		/* zap the old tx dma descriptor address field */
+		W_SM(&di->txd64[old].addrlow, BUS_SWAP32(0xdeadbeef));
+		W_SM(&di->txd64[old].addrhigh, BUS_SWAP32(0xdeadbeef));
+
+		/* move the corresponding txp[] entry */
+		ASSERT(di->txp[new] == NULL);
+		di->txp[new] = di->txp[old];
+		di->txp[old] = NULL;
+	}
+
+	/* update txin and txout */
+	di->txin = ad;
+	di->txout = TXD(di->txout + rot);
+	di->hnddma.txavail = di->ntxd - NTXDACTIVE(di->txin, di->txout) - 1;
+
+	/* kick the chip */
+	W_REG(di->osh, &di->d64txregs->ptr, I2B(di->txout, dma64dd_t));
+}
+
+#endif	/* BCMDMA64 */
 
 uint
 dma_addrwidth(sb_t *sbh, void *dmaregs)
@@ -1143,6 +1858,27 @@ dma_addrwidth(sb_t *sbh, void *dmaregs)
 
 	osh = sb_osh(sbh);
 
+	if (DMA64_CAP) {
+		/* DMA engine is 64-bit capable */
+		if (((sb_coreflagshi(sbh, 0, 0) & SBTMH_DMA64) == SBTMH_DMA64)) {
+			/* backplane are 64 bits capable */
+#if 0
+			if (sb_backplane64(sbh))
+				/* If bus is System Backplane or PCIE then we can access 64-bits */
+				if ((BUSTYPE(sbh->bustype) == SB_BUS) ||
+				    ((BUSTYPE(sbh->bustype) == PCI_BUS) &&
+					sbh->buscoretype == SB_PCIE))
+					return (DMADDRWIDTH_64);
+#endif
+
+			/* DMA64 is always 32 bits capable, AE is always TRUE */
+#ifdef BCMDMA64
+			ASSERT(_dma64_addrext(osh, (dma64regs_t *)dmaregs));
+#endif
+			return (DMADDRWIDTH_32);
+		}
+	}
+
 	/* Start checking for 32-bit / 30-bit addressing */
 	dma32regs = (dma32regs_t *)dmaregs;