rename broadcom-wl to broadcom-wl-old

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21794 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 2280 insertions, 0 deletions

diff --git a/package/broadcom-wl-old/src/driver/hnddma.c b/package/broadcom-wl-old/src/driver/hnddma.c
new file mode 100644
index 0000000000..47f0e2fc9f
--- /dev/null
+++ b/package/broadcom-wl-old/src/driver/hnddma.c
@@ -0,0 +1,2280 @@
+/*
+ * Generic Broadcom Home Networking Division (HND) DMA module.
+ * This supports the following chips: BCM42xx, 44xx, 47xx .
+ *
+ * Copyright 2007, Broadcom Corporation
+ * All Rights Reserved.
+ * 
+ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
+ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
+ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
+ *
+ */
+
+#include <typedefs.h>
+#include <bcmdefs.h>
+#include <osl.h>
+#include "linux_osl.h"
+#include <bcmendian.h>
+#include <sbconfig.h>
+#include "bcmutils.h"
+#include <bcmdevs.h>
+#include <sbutils.h>
+
+#include "sbhnddma.h"
+#include "hnddma.h"
+
+/* debug/trace */
+#ifdef BCMDBG
+#define	DMA_ERROR(args) if (!(*di->msg_level & 1)); else printf args
+#define	DMA_TRACE(args) if (!(*di->msg_level & 2)); else printf args
+#else
+#define	DMA_ERROR(args)
+#define	DMA_TRACE(args)
+#endif
+
+/* default dma message level (if input msg_level pointer is null in dma_attach()) */
+static uint dma_msg_level = 0;
+
+#define	MAXNAMEL	8	/* 8 char names */
+
+#define	DI_INFO(dmah)	(dma_info_t *)dmah
+typedef struct osl_dmainfo osldma_t;
+
+/* dma engine software state */
+typedef struct dma_info
+{
+  struct hnddma_pub hnddma;	/* exported structure, don't use hnddma_t,
+				 * which could be const
+				 */
+  uint *msg_level;		/* message level pointer */
+  char name[MAXNAMEL];		/* callers name for diag msgs */
+
+  void *osh;			/* os handle */
+  sb_t *sbh;			/* sb handle */
+
+  bool dma64;			/* dma64 enabled */
+  bool addrext;			/* this dma engine supports DmaExtendedAddrChanges */
+
+  dma32regs_t *d32txregs;	/* 32 bits dma tx engine registers */
+  dma32regs_t *d32rxregs;	/* 32 bits dma rx engine registers */
+  dma64regs_t *d64txregs;	/* 64 bits dma tx engine registers */
+  dma64regs_t *d64rxregs;	/* 64 bits dma rx engine registers */
+
+  uint32 dma64align;		/* either 8k or 4k depends on number of dd */
+  dma32dd_t *txd32;		/* pointer to dma32 tx descriptor ring */
+  dma64dd_t *txd64;		/* pointer to dma64 tx descriptor ring */
+  uint ntxd;			/* # tx descriptors tunable */
+  uint txin;			/* index of next descriptor to reclaim */
+  uint txout;			/* index of next descriptor to post */
+  void **txp;			/* pointer to parallel array of pointers to packets */
+  osldma_t *tx_dmah;		/* DMA TX descriptor ring handle */
+  osldma_t **txp_dmah;		/* DMA TX packet data handle */
+  ulong txdpa;			/* physical address of descriptor ring */
+  uint txdalign;		/* #bytes added to alloc'd mem to align txd */
+  uint txdalloc;		/* #bytes allocated for the ring */
+
+  dma32dd_t *rxd32;		/* pointer to dma32 rx descriptor ring */
+  dma64dd_t *rxd64;		/* pointer to dma64 rx descriptor ring */
+  uint nrxd;			/* # rx descriptors tunable */
+  uint rxin;			/* index of next descriptor to reclaim */
+  uint rxout;			/* index of next descriptor to post */
+  void **rxp;			/* pointer to parallel array of pointers to packets */
+  osldma_t *rx_dmah;		/* DMA RX descriptor ring handle */
+  osldma_t **rxp_dmah;		/* DMA RX packet data handle */
+  ulong rxdpa;			/* physical address of descriptor ring */
+  uint rxdalign;		/* #bytes added to alloc'd mem to align rxd */
+  uint rxdalloc;		/* #bytes allocated for the ring */
+
+  /* tunables */
+  uint rxbufsize;		/* rx buffer size in bytes,
+				   not including the extra headroom
+				 */
+  uint nrxpost;			/* # rx buffers to keep posted */
+  uint rxoffset;		/* rxcontrol offset */
+  uint ddoffsetlow;		/* add to get dma address of descriptor ring, low 32 bits */
+  uint ddoffsethigh;		/*   high 32 bits */
+  uint dataoffsetlow;		/* add to get dma address of data buffer, low 32 bits */
+  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)
+#define	RXD(x)		XXD((x), di->nrxd)
+#define	NEXTTXD(i)	TXD(i + 1)
+#define	PREVTXD(i)	TXD(i - 1)
+#define	NEXTRXD(i)	RXD(i + 1)
+#define	NTXDACTIVE(h, t)	TXD(t - h)
+#define	NRXDACTIVE(h, t)	RXD(t - h)
+
+/* macros to convert between byte offsets and indexes */
+#define	B2I(bytes, type)	((bytes) / sizeof(type))
+#define	I2B(index, type)	((index) * sizeof(type))
+
+#define	PCI32ADDR_HIGH		0xc0000000	/* address[31:30] */
+#define	PCI32ADDR_HIGH_SHIFT	30	/* address[31:30] */
+
+
+/* common prototypes */
+static bool _dma_isaddrext (dma_info_t * di);
+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);
+static void *_dma_rx (dma_info_t * di);
+static void _dma_rxfill (dma_info_t * di);
+static void _dma_rxreclaim (dma_info_t * di);
+static void _dma_rxenable (dma_info_t * di);
+static void *_dma_getnextrxp (dma_info_t * di, bool forceall);
+
+static void _dma_txblock (dma_info_t * di);
+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, const char *name);
+static void _dma_counterreset (dma_info_t * di);
+static void _dma_fifoloopbackenable (dma_info_t * di);
+
+/* ** 32 bit DMA prototypes */
+static bool dma32_alloc (dma_info_t * di, uint direction);
+static bool dma32_txreset (dma_info_t * di);
+static bool dma32_rxreset (dma_info_t * di);
+static bool dma32_txsuspendedidle (dma_info_t * di);
+static int dma32_txfast (dma_info_t * di, void *p0, bool commit);
+static void *dma32_getnexttxp (dma_info_t * di, bool forceall);
+static void *dma32_getnextrxp (dma_info_t * di, bool forceall);
+static void dma32_txrotate (dma_info_t * di);
+static bool dma32_rxidle (dma_info_t * di);
+static void dma32_txinit (dma_info_t * di);
+static bool dma32_txenabled (dma_info_t * di);
+static void dma32_txsuspend (dma_info_t * di);
+static void dma32_txresume (dma_info_t * di);
+static bool dma32_txsuspended (dma_info_t * di);
+static void dma32_txreclaim (dma_info_t * di, bool forceall);
+static bool dma32_txstopped (dma_info_t * di);
+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 */
+
+#ifdef BCMDBG
+static void dma32_dumpring (dma_info_t * di, struct bcmstrbuf *b,
+			    dma32dd_t * ring, uint start, uint end,
+			    uint max_num);
+static void dma32_dump (dma_info_t * di, struct bcmstrbuf *b, bool dumpring);
+static void dma32_dumptx (dma_info_t * di, struct bcmstrbuf *b,
+			  bool dumpring);
+static void dma32_dumprx (dma_info_t * di, struct bcmstrbuf *b,
+			  bool dumpring);
+
+static void dma64_dumpring (dma_info_t * di, struct bcmstrbuf *b,
+			    dma64dd_t * ring, uint start, uint end,
+			    uint max_num);
+static void dma64_dump (dma_info_t * di, struct bcmstrbuf *b, bool dumpring);
+static void dma64_dumptx (dma_info_t * di, struct bcmstrbuf *b,
+			  bool dumpring);
+static void dma64_dumprx (dma_info_t * di, struct bcmstrbuf *b,
+			  bool dumpring);
+#endif
+
+
+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,
+
+#ifdef BCMDBG
+  (di_dump_t) dma64_dump,
+  (di_dumptx_t) dma64_dumptx,
+  (di_dumprx_t) dma64_dumprx,
+#else
+  NULL,
+  NULL,
+  NULL,
+#endif
+  34
+};
+
+static di_fcn_t dma32proc = {
+  (di_detach_t) _dma_detach,
+  (di_txinit_t) dma32_txinit,
+  (di_txreset_t) dma32_txreset,
+  (di_txenabled_t) dma32_txenabled,
+  (di_txsuspend_t) dma32_txsuspend,
+  (di_txresume_t) dma32_txresume,
+  (di_txsuspended_t) dma32_txsuspended,
+  (di_txsuspendedidle_t) dma32_txsuspendedidle,
+  (di_txfast_t) dma32_txfast,
+  (di_txstopped_t) dma32_txstopped,
+  (di_txreclaim_t) dma32_txreclaim,
+  (di_getnexttxp_t) dma32_getnexttxp,
+  (di_peeknexttxp_t) _dma_peeknexttxp,
+  (di_txblock_t) _dma_txblock,
+  (di_txunblock_t) _dma_txunblock,
+  (di_txactive_t) _dma_txactive,
+  (di_txrotate_t) dma32_txrotate,
+
+  (di_rxinit_t) _dma_rxinit,
+  (di_rxreset_t) dma32_rxreset,
+  (di_rxidle_t) dma32_rxidle,
+  (di_rxstopped_t) dma32_rxstopped,
+  (di_rxenable_t) _dma_rxenable,
+  (di_rxenabled_t) dma32_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,
+
+#ifdef BCMDBG
+  (di_dump_t) dma32_dump,
+  (di_dumptx_t) dma32_dumptx,
+  (di_dumprx_t) dma32_dumprx,
+#else
+  NULL,
+  NULL,
+  NULL,
+#endif
+  34
+};
+
+hnddma_t *
+dma_attach (osl_t * osh, char *name, sb_t * sbh, void *dmaregstx,
+	    void *dmaregsrx, uint ntxd, uint nrxd, uint rxbufsize,
+	    uint nrxpost, uint rxoffset, uint * msg_level)
+{
+  dma_info_t *di;
+  uint size;
+
+  /* allocate private info structure */
+  if ((di = MALLOC (osh, sizeof (dma_info_t))) == NULL)
+    {
+#ifdef BCMDBG
+      printf ("dma_attach: out of memory, malloced %d bytes\n",
+	      MALLOCED (osh));
+#endif
+      return (NULL);
+    }
+  bzero ((char *) di, sizeof (dma_info_t));
+
+  di->msg_level = msg_level ? msg_level : &dma_msg_level;
+
+  /* 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));
+  ASSERT (ISPOWEROF2 (nrxd));
+  if (nrxd == 0)
+    ASSERT (dmaregsrx == NULL);
+  if (ntxd == 0)
+    ASSERT (dmaregstx == NULL);
+
+
+  /* init dma reg pointer */
+  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, (di->dma64 ? "DMA64" : "DMA32"), osh, ntxd, nrxd, rxbufsize, nrxpost, rxoffset, dmaregstx, dmaregsrx));
+
+  /* make a private copy of our callers name */
+  strncpy (di->name, name, MAXNAMEL);
+  di->name[MAXNAMEL - 1] = '\0';
+
+  di->osh = osh;
+  di->sbh = sbh;
+
+  /* save tunables */
+  di->ntxd = ntxd;
+  di->nrxd = nrxd;
+
+  /* the actual dma size doesn't include the extra headroom */
+  if (rxbufsize > BCMEXTRAHDROOM)
+    di->rxbufsize = rxbufsize - BCMEXTRAHDROOM;
+  else
+    di->rxbufsize = rxbufsize;
+
+  di->nrxpost = nrxpost;
+  di->rxoffset = rxoffset;
+
+  /*
+   * figure out the DMA physical address offset for dd and data
+   *   for old chips w/o sb, use zero
+   *   for new chips w sb,
+   *     PCI/PCIE: they map silicon backplace address to zero based memory, need offset
+   *     Other bus: use zero
+   *     SB_BUS BIGENDIAN kludge: use sdram swapped region for data buffer, not descriptor
+   */
+  di->ddoffsetlow = 0;
+  di->dataoffsetlow = 0;
+  /* for pci bus, add offset */
+  if (sbh->bustype == PCI_BUS)
+    {
+      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;
+    }
+
+#if defined(__mips__) && defined(IL_BIGENDIAN)
+  di->dataoffsetlow = di->dataoffsetlow + SB_SDRAM_SWAPPED;
+#endif
+
+  di->addrext = _dma_isaddrext (di);
+
+  /* allocate tx packet pointer vector */
+  if (ntxd)
+    {
+      size = ntxd * sizeof (void *);
+      if ((di->txp = MALLOC (osh, size)) == NULL)
+	{
+	  DMA_ERROR (("%s: dma_attach: out of tx memory, malloced %d bytes\n",
+		      di->name, MALLOCED (osh)));
+	  goto fail;
+	}
+      bzero ((char *) di->txp, size);
+    }
+
+  /* allocate rx packet pointer vector */
+  if (nrxd)
+    {
+      size = nrxd * sizeof (void *);
+      if ((di->rxp = MALLOC (osh, size)) == NULL)
+	{
+	  DMA_ERROR (("%s: dma_attach: out of rx memory, malloced %d bytes\n",
+		      di->name, MALLOCED (osh)));
+	  goto fail;
+	}
+      bzero ((char *) di->rxp, size);
+    }
+
+  /* allocate transmit descriptor ring, only need ntxd descriptors but it must be aligned */
+  if (ntxd)
+    {
+      if (!_dma_alloc (di, DMA_TX))
+	goto fail;
+    }
+
+  /* allocate receive descriptor ring, only need nrxd descriptors but it must be aligned */
+  if (nrxd)
+    {
+      if (!_dma_alloc (di, DMA_RX))
+	goto fail;
+    }
+
+  if ((di->ddoffsetlow == SB_PCI_DMA) && (di->txdpa > SB_PCI_DMA_SZ)
+      && !di->addrext)
+    {
+      DMA_ERROR (("%s: dma_attach: txdpa 0x%lx: addrext not supported\n",
+		  di->name, di->txdpa));
+      goto fail;
+    }
+  if ((di->ddoffsetlow == SB_PCI_DMA) && (di->rxdpa > SB_PCI_DMA_SZ)
+      && !di->addrext)
+    {
+      DMA_ERROR (("%s: dma_attach: rxdpa 0x%lx: addrext not supported\n",
+		  di->name, di->rxdpa));
+      goto fail;
+    }
+
+  DMA_TRACE (("ddoffsetlow 0x%x ddoffsethigh 0x%x dataoffsetlow 0x%x dataoffsethigh " "0x%x addrext %d\n", di->ddoffsetlow, di->ddoffsethigh, di->dataoffsetlow, di->dataoffsethigh, di->addrext));
+
+  /* allocate tx packet pointer vector and DMA mapping vectors */
+  if (ntxd)
+    {
+
+      size = ntxd * sizeof (osldma_t **);
+      if ((di->txp_dmah = (osldma_t **) MALLOC (osh, size)) == NULL)
+	goto fail;
+      bzero ((char *) di->txp_dmah, size);
+    }
+  else
+    di->txp_dmah = NULL;
+
+  /* allocate rx packet pointer vector and DMA mapping vectors */
+  if (nrxd)
+    {
+
+      size = nrxd * sizeof (osldma_t **);
+      if ((di->rxp_dmah = (osldma_t **) MALLOC (osh, size)) == NULL)
+	goto fail;
+      bzero ((char *) di->rxp_dmah, size);
+
+    }
+  else
+    di->rxp_dmah = NULL;
+
+  /* initialize opsvec of function pointers */
+  di->hnddma.di_fn = DMA64_ENAB (di) ? dma64proc : dma32proc;
+
+  return ((hnddma_t *) di);
+
+fail:
+  _dma_detach (di);
+  return (NULL);
+}
+
+/* init the tx or rx descriptor */
+static INLINE void
+dma32_dd_upd (dma_info_t * di, dma32dd_t * ddring, ulong pa, uint outidx,
+	      uint32 * flags, uint32 bufcount)
+{
+  /* dma32 uses 32 bits control to fit both flags and bufcounter */
+  *flags = *flags | (bufcount & CTRL_BC_MASK);
+
+  if ((di->dataoffsetlow != SB_PCI_DMA) || !(pa & PCI32ADDR_HIGH))
+    {
+      W_SM (&ddring[outidx].addr, BUS_SWAP32 (pa + di->dataoffsetlow));
+      W_SM (&ddring[outidx].ctrl, BUS_SWAP32 (*flags));
+    }
+  else
+    {
+      /* address extension */
+      uint32 ae;
+      ASSERT (di->addrext);
+      ae = (pa & PCI32ADDR_HIGH) >> PCI32ADDR_HIGH_SHIFT;
+      pa &= ~PCI32ADDR_HIGH;
+
+      *flags |= (ae << CTRL_AE_SHIFT);
+      W_SM (&ddring[outidx].addr, BUS_SWAP32 (pa + di->dataoffsetlow));
+      W_SM (&ddring[outidx].ctrl, BUS_SWAP32 (*flags));
+    }
+}
+
+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)
+{
+  uint32 w;
+
+  OR_REG (osh, &dma32regs->control, XC_AE);
+  w = R_REG (osh, &dma32regs->control);
+  AND_REG (osh, &dma32regs->control, ~XC_AE);
+  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)
+{
+  if (di == NULL)
+    return;
+
+  DMA_TRACE (("%s: dma_detach\n", di->name));
+
+  /* shouldn't be here if descriptors are unreclaimed */
+  ASSERT (di->txin == di->txout);
+  ASSERT (di->rxin == di->rxout);
+
+  /* free dma descriptor rings */
+  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)
+    MFREE (di->osh, (void *) di->txp, (di->ntxd * sizeof (void *)));
+  if (di->rxp)
+    MFREE (di->osh, (void *) di->rxp, (di->nrxd * sizeof (void *)));
+
+  /* free tx packet DMA handles */
+  if (di->txp_dmah)
+    MFREE (di->osh, (void *) di->txp_dmah, di->ntxd * sizeof (osldma_t **));
+
+  /* free rx packet DMA handles */
+  if (di->rxp_dmah)
+    MFREE (di->osh, (void *) di->rxp_dmah, di->nrxd * sizeof (osldma_t **));
+
+  /* free our private info structure */
+  MFREE (di->osh, (void *) di, sizeof (dma_info_t));
+
+}
+
+/* return TRUE if this dma engine supports DmaExtendedAddrChanges, otherwise FALSE */
+static bool
+_dma_isaddrext (dma_info_t * di)
+{
+  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));
+  return FALSE;
+}
+
+/* initialize descriptor table base address */
+static void
+_dma_ddtable_init (dma_info_t * di, uint direction, ulong pa)
+{
+  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));
+	    }
+	}
+
+    }
+  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
+	{
+	  /* 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);
+	    }
+	}
+    }
+}
+
+static void
+_dma_fifoloopbackenable (dma_info_t * di)
+{
+  DMA_TRACE (("%s: dma_fifoloopbackenable\n", di->name));
+  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
+_dma_rxinit (dma_info_t * di)
+{
+  DMA_TRACE (("%s: dma_rxinit\n", di->name));
+
+  if (di->nrxd == 0)
+    return;
+
+  di->rxin = di->rxout = 0;
+
+  /* clear rx descriptor ring */
+  if (DMA64_ENAB (di))
+    BZERO_SM ((void *) (uintptr) di->rxd64, (di->nrxd * sizeof (dma64dd_t)));
+  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
+_dma_rxenable (dma_info_t * di)
+{
+  DMA_TRACE (("%s: dma_rxenable\n", di->name));
+
+  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,
+ * or NULL if there are no more
+ */
+static void *
+_dma_rx (dma_info_t * di)
+{
+  void *p;
+  uint len;
+  int skiplen = 0;
+
+  while ((p = _dma_getnextrxp (di, FALSE)))
+    {
+      /* skip giant packets which span multiple rx descriptors */
+      if (skiplen > 0)
+	{
+	  skiplen -= di->rxbufsize;
+	  if (skiplen < 0)
+	    skiplen = 0;
+	  PKTFREE (di->osh, p, FALSE);
+	  continue;
+	}
+
+      len = ltoh16 (*(uint16 *) (PKTDATA (di->osh, p)));
+      DMA_TRACE (("%s: dma_rx len %d\n", di->name, len));
+
+      /* bad frame length check */
+      if (len > (di->rxbufsize - di->rxoffset))
+	{
+	  DMA_ERROR (("%s: dma_rx: bad frame length (%d)\n", di->name, len));
+	  if (len > 0)
+	    skiplen = len - (di->rxbufsize - di->rxoffset);
+	  PKTFREE (di->osh, p, FALSE);
+	  di->hnddma.rxgiants++;
+	  continue;
+	}
+
+      /* set actual length */
+      PKTSETLEN (di->osh, p, (di->rxoffset + len));
+
+      break;
+    }
+
+  return (p);
+}
+
+/* post receive buffers */
+static void
+_dma_rxfill (dma_info_t * di)
+{
+  void *p;
+  uint rxin, rxout;
+  uint32 flags = 0;
+  uint n;
+  uint i;
+  uint32 pa;
+  uint extra_offset = 0;
+
+  /*
+   * Determine how many receive buffers we're lacking
+   * from the full complement, allocate, initialize,
+   * and post them, then update the chip rx lastdscr.
+   */
+
+  rxin = di->rxin;
+  rxout = di->rxout;
+
+  n = di->nrxpost - NRXDACTIVE (rxin, rxout);
+
+  DMA_TRACE (("%s: dma_rxfill: post %d\n", di->name, n));
+
+  if (di->rxbufsize > BCMEXTRAHDROOM)
+    extra_offset = BCMEXTRAHDROOM;
+
+  for (i = 0; i < n; i++)
+    {
+      /* the di->rxbufsize doesn't include the extra headroom, we need to add it to the
+         size to be allocated
+       */
+      if ((p = PKTGET (di->osh, di->rxbufsize + extra_offset, FALSE)) == NULL)
+	{
+	  DMA_ERROR (("%s: dma_rxfill: out of rxbufs\n", di->name));
+	  di->hnddma.rxnobuf++;
+	  break;
+	}
+      /* reserve an extra headroom, if applicable */
+      if (extra_offset)
+	PKTPULL (di->osh, p, extra_offset);
+
+      /* Do a cached write instead of uncached write since DMA_MAP
+       * will flush the cache.
+       */
+      *(uint32 *) (PKTDATA (di->osh, p)) = 0;
+
+      pa = (uint32) DMA_MAP (di->osh, PKTDATA (di->osh, p),
+			     di->rxbufsize, DMA_RX, p, &di->rxp_dmah[rxout]);
+
+      ASSERT (ISALIGNED (pa, 4));
+
+      /* save the free packet pointer */
+      ASSERT (di->rxp[rxout] == NULL);
+      di->rxp[rxout] = p;
+
+      /* reset flags for each descriptor */
+      flags = 0;
+      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 */
+  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 */
+static void *
+_dma_peeknexttxp (dma_info_t * di)
+{
+  uint end, i;
+
+  if (di->ntxd == 0)
+    return (NULL);
+
+  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])
+      return (di->txp[i]);
+
+  return (NULL);
+}
+
+static void
+_dma_rxreclaim (dma_info_t * di)
+{
+  void *p;
+
+  /* "unused local" warning suppression for OSLs that
+   * define PKTFREE() without using the di->osh arg
+   */
+  di = di;
+
+  DMA_TRACE (("%s: dma_rxreclaim\n", di->name));
+
+  while ((p = _dma_getnextrxp (di, TRUE)))
+    PKTFREE (di->osh, p, FALSE);
+}
+
+static void *
+_dma_getnextrxp (dma_info_t * di, bool forceall)
+{
+  if (di->nrxd == 0)
+    return (NULL);
+
+  if (DMA64_ENAB (di))
+    {
+      return dma64_getnextrxp (di, forceall);
+    }
+  else
+    {
+      return dma32_getnextrxp (di, forceall);
+    }
+}
+
+static void
+_dma_txblock (dma_info_t * di)
+{
+  di->hnddma.txavail = 0;
+}
+
+static void
+_dma_txunblock (dma_info_t * di)
+{
+  di->hnddma.txavail = di->ntxd - NTXDACTIVE (di->txin, di->txout) - 1;
+}
+
+static uint
+_dma_txactive (dma_info_t * di)
+{
+  return (NTXDACTIVE (di->txin, di->txout));
+}
+
+static void
+_dma_counterreset (dma_info_t * di)
+{
+  /* reset all software counter */
+  di->hnddma.rxgiants = 0;
+  di->hnddma.rxnobuf = 0;
+  di->hnddma.txnobuf = 0;
+}
+
+/* get the address of the var in order to change later */
+static uintptr
+_dma_getvar (dma_info_t * di, const char *name)
+{
+  if (!strcmp (name, "&txavail"))
+    return ((uintptr) & (di->hnddma.txavail));
+  else
+    {
+      ASSERT (0);
+    }
+  return (0);
+}
+
+void
+dma_txpioloopback (osl_t * osh, dma32regs_t * regs)
+{
+  OR_REG (osh, &regs->control, XC_LE);
+}
+
+#ifdef BCMDBG
+static void
+dma32_dumpring (dma_info_t * di, struct bcmstrbuf *b, dma32dd_t * ring,
+		uint start, uint end, uint max_num)
+{
+  uint i;
+
+  for (i = start; i != end; i = XXD ((i + 1), max_num))
+    {
+      /* in the format of high->low 8 bytes */
+      bcm_bprintf (b, "ring index %d: 0x%x %x\n", i, ring[i].addr,
+		   ring[i].ctrl);
+    }
+}
+
+static void
+dma32_dumptx (dma_info_t * di, struct bcmstrbuf *b, bool dumpring)
+{
+  if (di->ntxd == 0)
+    return;
+
+  bcm_bprintf (b, "DMA32: txd32 %p txdpa 0x%lx txp %p txin %d txout %d "
+	       "txavail %d\n", di->txd32, di->txdpa, di->txp, di->txin,
+	       di->txout, di->hnddma.txavail);
+
+  bcm_bprintf (b, "xmtcontrol 0x%x xmtaddr 0x%x xmtptr 0x%x xmtstatus 0x%x\n",
+	       R_REG (di->osh, &di->d32txregs->control),
+	       R_REG (di->osh, &di->d32txregs->addr),
+	       R_REG (di->osh, &di->d32txregs->ptr),
+	       R_REG (di->osh, &di->d32txregs->status));
+
+  if (dumpring && di->txd32)
+    dma32_dumpring (di, b, di->txd32, di->txin, di->txout, di->ntxd);
+}
+
+static void
+dma32_dumprx (dma_info_t * di, struct bcmstrbuf *b, bool dumpring)
+{
+  if (di->nrxd == 0)
+    return;
+
+  bcm_bprintf (b, "DMA32: rxd32 %p rxdpa 0x%lx rxp %p rxin %d rxout %d\n",
+	       di->rxd32, di->rxdpa, di->rxp, di->rxin, di->rxout);
+
+  bcm_bprintf (b, "rcvcontrol 0x%x rcvaddr 0x%x rcvptr 0x%x rcvstatus 0x%x\n",
+	       R_REG (di->osh, &di->d32rxregs->control),
+	       R_REG (di->osh, &di->d32rxregs->addr),
+	       R_REG (di->osh, &di->d32rxregs->ptr),
+	       R_REG (di->osh, &di->d32rxregs->status));
+  if (di->rxd32 && dumpring)
+    dma32_dumpring (di, b, di->rxd32, di->rxin, di->rxout, di->nrxd);
+}
+
+static void
+dma32_dump (dma_info_t * di, struct bcmstrbuf *b, bool dumpring)
+{
+  dma32_dumptx (di, b, dumpring);
+  dma32_dumprx (di, b, dumpring);
+}
+
+static void
+dma64_dumpring (dma_info_t * di, struct bcmstrbuf *b, dma64dd_t * ring,
+		uint start, uint end, uint max_num)
+{
+  uint i;
+
+  for (i = start; i != end; i = XXD ((i + 1), max_num))
+    {
+      /* in the format of high->low 16 bytes */
+      bcm_bprintf (b, "ring index %d: 0x%x %x %x %x\n",
+		   i, ring[i].addrhigh, ring[i].addrlow, ring[i].ctrl2,
+		   ring[i].ctrl1);
+    }
+}
+
+static void
+dma64_dumptx (dma_info_t * di, struct bcmstrbuf *b, bool dumpring)
+{
+  if (di->ntxd == 0)
+    return;
+
+  bcm_bprintf (b, "DMA64: txd64 %p txdpa 0x%lx txp %p txin %d txout %d "
+	       "txavail %d\n", di->txd64, di->txdpa, di->txp, di->txin,
+	       di->txout, di->hnddma.txavail);
+
+  bcm_bprintf (b, "xmtcontrol 0x%x xmtaddrlow 0x%x xmtaddrhigh 0x%x "
+	       "xmtptr 0x%x xmtstatus0 0x%x xmtstatus1 0x%x\n",
+	       R_REG (di->osh, &di->d64txregs->control),
+	       R_REG (di->osh, &di->d64txregs->addrlow),
+	       R_REG (di->osh, &di->d64txregs->addrhigh),
+	       R_REG (di->osh, &di->d64txregs->ptr),
+	       R_REG (di->osh, &di->d64txregs->status0),
+	       R_REG (di->osh, &di->d64txregs->status1));
+
+  if (dumpring && di->txd64)
+    {
+      dma64_dumpring (di, b, di->txd64, di->txin, di->txout, di->ntxd);
+    }
+}
+
+static void
+dma64_dumprx (dma_info_t * di, struct bcmstrbuf *b, bool dumpring)
+{
+  if (di->nrxd == 0)
+    return;
+
+  bcm_bprintf (b, "DMA64: rxd64 %p rxdpa 0x%lx rxp %p rxin %d rxout %d\n",
+	       di->rxd64, di->rxdpa, di->rxp, di->rxin, di->rxout);
+
+  bcm_bprintf (b, "rcvcontrol 0x%x rcvaddrlow 0x%x rcvaddrhigh 0x%x rcvptr "
+	       "0x%x rcvstatus0 0x%x rcvstatus1 0x%x\n",
+	       R_REG (di->osh, &di->d64rxregs->control),
+	       R_REG (di->osh, &di->d64rxregs->addrlow),
+	       R_REG (di->osh, &di->d64rxregs->addrhigh),
+	       R_REG (di->osh, &di->d64rxregs->ptr),
+	       R_REG (di->osh, &di->d64rxregs->status0),
+	       R_REG (di->osh, &di->d64rxregs->status1));
+  if (di->rxd64 && dumpring)
+    {
+      dma64_dumpring (di, b, di->rxd64, di->rxin, di->rxout, di->nrxd);
+    }
+}
+
+static void
+dma64_dump (dma_info_t * di, struct bcmstrbuf *b, bool dumpring)
+{
+  dma64_dumptx (di, b, dumpring);
+  dma64_dumprx (di, b, dumpring);
+}
+
+#endif /* BCMDBG */
+
+
+/* 32 bits DMA functions */
+static void
+dma32_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->txd32, (di->ntxd * sizeof (dma32dd_t)));
+  W_REG (di->osh, &di->d32txregs->control, XC_XE);
+  _dma_ddtable_init (di, DMA_TX, di->txdpa);
+}
+
+static bool
+dma32_txenabled (dma_info_t * di)
+{
+  uint32 xc;
+
+  /* If the chip is dead, it is not enabled :-) */
+  xc = R_REG (di->osh, &di->d32txregs->control);
+  return ((xc != 0xffffffff) && (xc & XC_XE));
+}
+
+static void
+dma32_txsuspend (dma_info_t * di)
+{
+  DMA_TRACE (("%s: dma_txsuspend\n", di->name));
+
+  if (di->ntxd == 0)
+    return;
+
+  OR_REG (di->osh, &di->d32txregs->control, XC_SE);
+}
+
+static void
+dma32_txresume (dma_info_t * di)
+{
+  DMA_TRACE (("%s: dma_txresume\n", di->name));
+
+  if (di->ntxd == 0)
+    return;
+
+  AND_REG (di->osh, &di->d32txregs->control, ~XC_SE);
+}
+
+static bool
+dma32_txsuspended (dma_info_t * di)
+{
+  return (di->ntxd == 0)
+    || ((R_REG (di->osh, &di->d32txregs->control) & XC_SE) == XC_SE);
+}
+
+static void
+dma32_txreclaim (dma_info_t * di, bool forceall)
+{
+  void *p;
+
+  DMA_TRACE (("%s: dma_txreclaim %s\n", di->name, forceall ? "all" : ""));
+
+  while ((p = dma32_getnexttxp (di, forceall)))
+    PKTFREE (di->osh, p, TRUE);
+}
+
+static bool
+dma32_txstopped (dma_info_t * di)
+{
+  return ((R_REG (di->osh, &di->d32txregs->status) & XS_XS_MASK) ==
+	  XS_XS_STOPPED);
+}
+
+static bool
+dma32_rxstopped (dma_info_t * di)
+{
+  return ((R_REG (di->osh, &di->d32rxregs->status) & RS_RS_MASK) ==
+	  RS_RS_STOPPED);
+}
+
+static bool
+dma32_alloc (dma_info_t * di, uint direction)
+{
+  uint size;
+  uint ddlen;
+  void *va;
+
+  ddlen = sizeof (dma32dd_t);
+
+  size = (direction == DMA_TX) ? (di->ntxd * ddlen) : (di->nrxd * ddlen);
+
+  if (!ISALIGNED (DMA_CONSISTENT_ALIGN, D32RINGALIGN))
+    size += D32RINGALIGN;
+
+
+  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->txd32 = (dma32dd_t *) ROUNDUP ((uintptr) va, D32RINGALIGN);
+      di->txdalign = (uint) ((int8 *) (uintptr) di->txd32 - (int8 *) va);
+      di->txdpa += di->txdalign;
+      di->txdalloc = size;
+      ASSERT (ISALIGNED ((uintptr) di->txd32, D32RINGALIGN));
+    }
+  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->rxd32 = (dma32dd_t *) ROUNDUP ((uintptr) va, D32RINGALIGN);
+      di->rxdalign = (uint) ((int8 *) (uintptr) di->rxd32 - (int8 *) va);
+      di->rxdpa += di->rxdalign;
+      di->rxdalloc = size;
+      ASSERT (ISALIGNED ((uintptr) di->rxd32, D32RINGALIGN));
+    }
+
+  return TRUE;
+}
+
+static bool
+dma32_txreset (dma_info_t * di)
+{
+  uint32 status;
+
+  if (di->ntxd == 0)
+    return TRUE;
+
+  /* suspend tx DMA first */
+  W_REG (di->osh, &di->d32txregs->control, XC_SE);
+  SPINWAIT (((status = (R_REG (di->osh, &di->d32txregs->status) & XS_XS_MASK))
+	     != XS_XS_DISABLED) &&
+	    (status != XS_XS_IDLE) && (status != XS_XS_STOPPED), (10000));
+
+  W_REG (di->osh, &di->d32txregs->control, 0);
+  SPINWAIT (((status = (R_REG (di->osh,
+			       &di->d32txregs->status) & XS_XS_MASK)) !=
+	     XS_XS_DISABLED), 10000);
+
+  /* wait for the last transaction to complete */
+  OSL_DELAY (300);
+
+  return (status == XS_XS_DISABLED);
+}
+
+static bool
+dma32_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->d32rxregs->status) & RS_CD_MASK) ==
+	  R_REG (di->osh, &di->d32rxregs->ptr));
+}
+
+static bool
+dma32_rxreset (dma_info_t * di)
+{
+  uint32 status;
+
+  if (di->nrxd == 0)
+    return TRUE;
+
+  W_REG (di->osh, &di->d32rxregs->control, 0);
+  SPINWAIT (((status = (R_REG (di->osh,
+			       &di->d32rxregs->status) & RS_RS_MASK)) !=
+	     RS_RS_DISABLED), 10000);
+
+  return (status == RS_RS_DISABLED);
+}
+
+static bool
+dma32_rxenabled (dma_info_t * di)
+{
+  uint32 rc;
+
+  rc = R_REG (di->osh, &di->d32rxregs->control);
+  return ((rc != 0xffffffff) && (rc & RC_RE));
+}
+
+static bool
+dma32_txsuspendedidle (dma_info_t * di)
+{
+  if (di->ntxd == 0)
+    return TRUE;
+
+  if (!(R_REG (di->osh, &di->d32txregs->control) & XC_SE))
+    return 0;
+
+  if ((R_REG (di->osh, &di->d32txregs->status) & XS_XS_MASK) != XS_XS_IDLE)
+    return 0;
+
+  OSL_DELAY (2);
+  return ((R_REG (di->osh, &di->d32txregs->status) & XS_XS_MASK) ==
+	  XS_XS_IDLE);
+}
+
+/* !! tx entry routine
+ * supports full 32bit dma engine buffer addressing so
+ * dma buffers can cross 4 Kbyte page boundaries.
+ */
+static int
+dma32_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,
+			  &di->txp_dmah[txout]);
+
+      flags = 0;
+      if (p == p0)
+	flags |= CTRL_SOF;
+      if (next == NULL)
+	flags |= (CTRL_IOC | CTRL_EOF);
+      if (txout == (di->ntxd - 1))
+	flags |= CTRL_EOT;
+
+      dma32_dd_upd (di, di->txd32, pa, txout, &flags, len);
+      ASSERT (di->txp[txout] == NULL);
+
+      txout = NEXTTXD (txout);
+    }
+
+  /* if last txd eof not set, fix it */
+  if (!(flags & CTRL_EOF))
+    W_SM (&di->txd32[PREVTXD (txout)].ctrl,
+	  BUS_SWAP32 (flags | CTRL_IOC | CTRL_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->d32txregs->ptr, I2B (txout, dma32dd_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 *
+dma32_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->d32txregs->status) & XS_CD_MASK, dma32dd_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->txd32[i].addr)) - di->dataoffsetlow),
+		 (BUS_SWAP32 (R_SM (&di->txd32[i].ctrl)) & CTRL_BC_MASK),
+		 DMA_TX, di->txp[i], &di->txp_dmah[i]);
+
+      W_SM (&di->txd32[i].addr, 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 *
+dma32_getnextrxp (dma_info_t * di, bool forceall)
+{
+  uint i;
+  void *rxp;
+
+  /* if forcing, dma engine must be disabled */
+  ASSERT (!forceall || !dma32_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->d32rxregs->status) & RS_CD_MASK,
+	       dma32dd_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->rxd32[i].addr)) - di->dataoffsetlow),
+	     di->rxbufsize, DMA_RX, rxp, &di->rxp_dmah[i]);
+
+  W_SM (&di->rxd32[i].addr, 0xdeadbeef);
+
+  di->rxin = NEXTRXD (i);
+
+  return (rxp);
+}
+
+/*
+ * Rotate all active tx dma ring entries "forward" by (ActiveDescriptor - txin).
+ */
+static void
+dma32_txrotate (dma_info_t * di)
+{
+  uint ad;
+  uint nactive;
+  uint rot;
+  uint old, new;
+  uint32 w;
+  uint first, last;
+
+  ASSERT (dma32_txsuspendedidle (di));
+
+  nactive = _dma_txactive (di);
+  ad =
+    B2I (((R_REG (di->osh, &di->d32txregs->status) & XS_AD_MASK) >>
+	  XS_AD_SHIFT), dma32dd_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->txd32[old].ctrl)) & ~CTRL_EOT;
+      if (new == (di->ntxd - 1))
+	w |= CTRL_EOT;
+      W_SM (&di->txd32[new].ctrl, BUS_SWAP32 (w));
+      W_SM (&di->txd32[new].addr, R_SM (&di->txd32[old].addr));
+
+      /* zap the old tx dma descriptor address field */
+      W_SM (&di->txd32[old].addr, 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->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,
+			  &di->txp_dmah[txout]);
+
+      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], &di->txp_dmah[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, &di->rxp_dmah[i]);
+
+  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)
+{
+  dma32regs_t *dma32regs;
+  osl_t *osh;
+
+  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 (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);
+
+	  /* 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;
+
+  /* For System Backplane, PCIE bus or addrext feature, 32-bits ok */
+  if ((BUSTYPE (sbh->bustype) == SB_BUS) ||
+      ((BUSTYPE (sbh->bustype) == PCI_BUS) && sbh->buscoretype == SB_PCIE) ||
+      (_dma32_addrext (osh, dma32regs)))
+    return (DMADDRWIDTH_32);
+
+  /* Fallthru */
+  return (DMADDRWIDTH_30);
+}