remove old bcm43xx-mac80211... will be replaced by b43

SVN-Revision: 9291

1 files changed, 0 insertions, 1520 deletions

diff --git a/package/bcm43xx-mac80211/src/bcm43xx/bcm43xx_dma.c b/package/bcm43xx-mac80211/src/bcm43xx/bcm43xx_dma.c
deleted file mode 100644
index 814e1ad075..0000000000
--- a/package/bcm43xx-mac80211/src/bcm43xx/bcm43xx_dma.c
+++ /dev/null
@@ -1,1520 +0,0 @@
-/*
-
-  Broadcom BCM43xx wireless driver
-
-  DMA ringbuffer and descriptor allocation/management
-
-  Copyright (c) 2005, 2006 Michael Buesch <mb@bu3sch.de>
-
-  Some code in this file is derived from the b44.c driver
-  Copyright (C) 2002 David S. Miller
-  Copyright (C) Pekka Pietikainen
-
-  This program is free software; you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation; either version 2 of the License, or
-  (at your option) any later version.
-
-  This program is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with this program; see the file COPYING.  If not, write to
-  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
-  Boston, MA 02110-1301, USA.
-
-*/
-
-#include "bcm43xx.h"
-#include "bcm43xx_dma.h"
-#include "bcm43xx_main.h"
-#include "bcm43xx_debugfs.h"
-#include "bcm43xx_power.h"
-#include "bcm43xx_xmit.h"
-
-#include <linux/dma-mapping.h>
-#include <linux/pci.h>
-#include <linux/delay.h>
-#include <linux/skbuff.h>
-
-
-/* 32bit DMA ops. */
-static
-struct bcm43xx_dmadesc_generic * op32_idx2desc(struct bcm43xx_dmaring *ring,
-					       int slot,
-					       struct bcm43xx_dmadesc_meta **meta)
-{
-	struct bcm43xx_dmadesc32 *desc;
-
-	*meta = &(ring->meta[slot]);
-	desc = ring->descbase;
-	desc = &(desc[slot]);
-
-	return (struct bcm43xx_dmadesc_generic *)desc;
-}
-
-static void op32_fill_descriptor(struct bcm43xx_dmaring *ring,
-				 struct bcm43xx_dmadesc_generic *desc,
-				 dma_addr_t dmaaddr, u16 bufsize,
-				 int start, int end, int irq)
-{
-	struct bcm43xx_dmadesc32 *descbase = ring->descbase;
-	int slot;
-	u32 ctl;
-	u32 addr;
-	u32 addrext;
-
-	slot = (int)(&(desc->dma32) - descbase);
-	assert(slot >= 0 && slot < ring->nr_slots);
-
-	addr = (u32)(dmaaddr & ~SSB_DMA_TRANSLATION_MASK);
-	addrext = (u32)(dmaaddr & SSB_DMA_TRANSLATION_MASK)
-		   >> SSB_DMA_TRANSLATION_SHIFT;
-	addr |= ssb_dma_translation(ring->dev->dev);
-	ctl = (bufsize - ring->frameoffset)
-	      & BCM43xx_DMA32_DCTL_BYTECNT;
-	if (slot == ring->nr_slots - 1)
-		ctl |= BCM43xx_DMA32_DCTL_DTABLEEND;
-	if (start)
-		ctl |= BCM43xx_DMA32_DCTL_FRAMESTART;
-	if (end)
-		ctl |= BCM43xx_DMA32_DCTL_FRAMEEND;
-	if (irq)
-		ctl |= BCM43xx_DMA32_DCTL_IRQ;
-	ctl |= (addrext << BCM43xx_DMA32_DCTL_ADDREXT_SHIFT)
-	       & BCM43xx_DMA32_DCTL_ADDREXT_MASK;
-
-	desc->dma32.control = cpu_to_le32(ctl);
-	desc->dma32.address = cpu_to_le32(addr);
-}
-
-static void op32_poke_tx(struct bcm43xx_dmaring *ring, int slot)
-{
-	bcm43xx_dma_write(ring, BCM43xx_DMA32_TXINDEX,
-			  (u32)(slot * sizeof(struct bcm43xx_dmadesc32)));
-}
-
-static void op32_tx_suspend(struct bcm43xx_dmaring *ring)
-{
-	bcm43xx_dma_write(ring, BCM43xx_DMA32_TXCTL,
-			  bcm43xx_dma_read(ring, BCM43xx_DMA32_TXCTL)
-			  | BCM43xx_DMA32_TXSUSPEND);
-}
-
-static void op32_tx_resume(struct bcm43xx_dmaring *ring)
-{
-	bcm43xx_dma_write(ring, BCM43xx_DMA32_TXCTL,
-			  bcm43xx_dma_read(ring, BCM43xx_DMA32_TXCTL)
-			  & ~BCM43xx_DMA32_TXSUSPEND);
-}
-
-static int op32_get_current_rxslot(struct bcm43xx_dmaring *ring)
-{
-	u32 val;
-
-	val = bcm43xx_dma_read(ring, BCM43xx_DMA32_RXSTATUS);
-	val &= BCM43xx_DMA32_RXDPTR;
-
-	return (val / sizeof(struct bcm43xx_dmadesc32));
-}
-
-static void op32_set_current_rxslot(struct bcm43xx_dmaring *ring,
-				    int slot)
-{
-	bcm43xx_dma_write(ring, BCM43xx_DMA32_RXINDEX,
-			  (u32)(slot * sizeof(struct bcm43xx_dmadesc32)));
-}
-
-static const struct bcm43xx_dma_ops dma32_ops = {
-	.idx2desc		= op32_idx2desc,
-	.fill_descriptor	= op32_fill_descriptor,
-	.poke_tx		= op32_poke_tx,
-	.tx_suspend		= op32_tx_suspend,
-	.tx_resume		= op32_tx_resume,
-	.get_current_rxslot	= op32_get_current_rxslot,
-	.set_current_rxslot	= op32_set_current_rxslot,
-};
-
-/* 64bit DMA ops. */
-static
-struct bcm43xx_dmadesc_generic * op64_idx2desc(struct bcm43xx_dmaring *ring,
-					       int slot,
-					       struct bcm43xx_dmadesc_meta **meta)
-{
-	struct bcm43xx_dmadesc64 *desc;
-
-	*meta = &(ring->meta[slot]);
-	desc = ring->descbase;
-	desc = &(desc[slot]);
-
-	return (struct bcm43xx_dmadesc_generic *)desc;
-}
-
-static void op64_fill_descriptor(struct bcm43xx_dmaring *ring,
-				 struct bcm43xx_dmadesc_generic *desc,
-				 dma_addr_t dmaaddr, u16 bufsize,
-				 int start, int end, int irq)
-{
-	struct bcm43xx_dmadesc64 *descbase = ring->descbase;
-	int slot;
-	u32 ctl0 = 0, ctl1 = 0;
-	u32 addrlo, addrhi;
-	u32 addrext;
-
-	slot = (int)(&(desc->dma64) - descbase);
-	assert(slot >= 0 && slot < ring->nr_slots);
-
-	addrlo = (u32)(dmaaddr & 0xFFFFFFFF);
-	addrhi = (((u64)dmaaddr >> 32) & ~SSB_DMA_TRANSLATION_MASK);
-	addrext = (((u64)dmaaddr >> 32) & SSB_DMA_TRANSLATION_MASK)
-		  >> SSB_DMA_TRANSLATION_SHIFT;
-	addrhi |= ssb_dma_translation(ring->dev->dev);
-	if (slot == ring->nr_slots - 1)
-		ctl0 |= BCM43xx_DMA64_DCTL0_DTABLEEND;
-	if (start)
-		ctl0 |= BCM43xx_DMA64_DCTL0_FRAMESTART;
-	if (end)
-		ctl0 |= BCM43xx_DMA64_DCTL0_FRAMEEND;
-	if (irq)
-		ctl0 |= BCM43xx_DMA64_DCTL0_IRQ;
-	ctl1 |= (bufsize - ring->frameoffset)
-		& BCM43xx_DMA64_DCTL1_BYTECNT;
-	ctl1 |= (addrext << BCM43xx_DMA64_DCTL1_ADDREXT_SHIFT)
-		& BCM43xx_DMA64_DCTL1_ADDREXT_MASK;
-
-	desc->dma64.control0 = cpu_to_le32(ctl0);
-	desc->dma64.control1 = cpu_to_le32(ctl1);
-	desc->dma64.address_low = cpu_to_le32(addrlo);
-	desc->dma64.address_high = cpu_to_le32(addrhi);
-}
-
-static void op64_poke_tx(struct bcm43xx_dmaring *ring, int slot)
-{
-	bcm43xx_dma_write(ring, BCM43xx_DMA64_TXINDEX,
-			  (u32)(slot * sizeof(struct bcm43xx_dmadesc64)));
-}
-
-static void op64_tx_suspend(struct bcm43xx_dmaring *ring)
-{
-	bcm43xx_dma_write(ring, BCM43xx_DMA64_TXCTL,
-			  bcm43xx_dma_read(ring, BCM43xx_DMA64_TXCTL)
-			  | BCM43xx_DMA64_TXSUSPEND);
-}
-
-static void op64_tx_resume(struct bcm43xx_dmaring *ring)
-{
-	bcm43xx_dma_write(ring, BCM43xx_DMA64_TXCTL,
-			  bcm43xx_dma_read(ring, BCM43xx_DMA64_TXCTL)
-			  & ~BCM43xx_DMA64_TXSUSPEND);
-}
-
-static int op64_get_current_rxslot(struct bcm43xx_dmaring *ring)
-{
-	u32 val;
-
-	val = bcm43xx_dma_read(ring, BCM43xx_DMA64_RXSTATUS);
-	val &= BCM43xx_DMA64_RXSTATDPTR;
-
-	return (val / sizeof(struct bcm43xx_dmadesc64));
-}
-
-static void op64_set_current_rxslot(struct bcm43xx_dmaring *ring,
-				    int slot)
-{
-	bcm43xx_dma_write(ring, BCM43xx_DMA64_RXINDEX,
-			  (u32)(slot * sizeof(struct bcm43xx_dmadesc64)));
-}
-
-static const struct bcm43xx_dma_ops dma64_ops = {
-	.idx2desc		= op64_idx2desc,
-	.fill_descriptor	= op64_fill_descriptor,
-	.poke_tx		= op64_poke_tx,
-	.tx_suspend		= op64_tx_suspend,
-	.tx_resume		= op64_tx_resume,
-	.get_current_rxslot	= op64_get_current_rxslot,
-	.set_current_rxslot	= op64_set_current_rxslot,
-};
-
-
-static inline int free_slots(struct bcm43xx_dmaring *ring)
-{
-	return (ring->nr_slots - ring->used_slots);
-}
-
-static inline int next_slot(struct bcm43xx_dmaring *ring, int slot)
-{
-	assert(slot >= -1 && slot <= ring->nr_slots - 1);
-	if (slot == ring->nr_slots - 1)
-		return 0;
-	return slot + 1;
-}
-
-static inline int prev_slot(struct bcm43xx_dmaring *ring, int slot)
-{
-	assert(slot >= 0 && slot <= ring->nr_slots - 1);
-	if (slot == 0)
-		return ring->nr_slots - 1;
-	return slot - 1;
-}
-
-#ifdef CONFIG_BCM43XX_MAC80211_DEBUG
-static void update_max_used_slots(struct bcm43xx_dmaring *ring,
-				  int current_used_slots)
-{
-	if (current_used_slots <= ring->max_used_slots)
-		return;
-	ring->max_used_slots = current_used_slots;
-	if (bcm43xx_debug(ring->dev, BCM43xx_DBG_DMAVERBOSE)) {
-		dprintk(KERN_DEBUG PFX
-			"max_used_slots increased to %d on %s ring %d\n",
-			ring->max_used_slots,
-			ring->tx ? "TX" : "RX",
-			ring->index);
-	}
-}
-#else
-static inline
-void update_max_used_slots(struct bcm43xx_dmaring *ring,
-			   int current_used_slots)
-{ }
-#endif /* DEBUG */
-
-/* Request a slot for usage. */
-static inline
-int request_slot(struct bcm43xx_dmaring *ring)
-{
-	int slot;
-
-	assert(ring->tx);
-	assert(!ring->stopped);
-	assert(free_slots(ring) != 0);
-
-	slot = next_slot(ring, ring->current_slot);
-	ring->current_slot = slot;
-	ring->used_slots++;
-
-	update_max_used_slots(ring, ring->used_slots);
-
-	return slot;
-}
-
-/* Mac80211-queue to bcm43xx-ring mapping */
-static struct bcm43xx_dmaring * priority_to_txring(struct bcm43xx_wldev *dev,
-						   int queue_priority)
-{
-	struct bcm43xx_dmaring *ring;
-
-/*FIXME: For now we always run on TX-ring-1 */
-return dev->dma.tx_ring1;
-
-	/* 0 = highest priority */
-	switch (queue_priority) {
-	default:
-		assert(0);
-		/* fallthrough */
-	case 0:
-		ring = dev->dma.tx_ring3;
-		break;
-	case 1:
-		ring = dev->dma.tx_ring2;
-		break;
-	case 2:
-		ring = dev->dma.tx_ring1;
-		break;
-	case 3:
-		ring = dev->dma.tx_ring0;
-		break;
-	case 4:
-		ring = dev->dma.tx_ring4;
-		break;
-	case 5:
-		ring = dev->dma.tx_ring5;
-		break;
-	}
-
-	return ring;
-}
-
-/* Bcm43xx-ring to mac80211-queue mapping */
-static inline int txring_to_priority(struct bcm43xx_dmaring *ring)
-{
-	static const u8 idx_to_prio[] =
-		{ 3, 2, 1, 0, 4, 5, };
-
-/*FIXME: have only one queue, for now */
-return 0;
-
-	return idx_to_prio[ring->index];
-}
-
-
-u16 bcm43xx_dmacontroller_base(int dma64bit, int controller_idx)
-{
-	static const u16 map64[] = {
-		BCM43xx_MMIO_DMA64_BASE0,
-		BCM43xx_MMIO_DMA64_BASE1,
-		BCM43xx_MMIO_DMA64_BASE2,
-		BCM43xx_MMIO_DMA64_BASE3,
-		BCM43xx_MMIO_DMA64_BASE4,
-		BCM43xx_MMIO_DMA64_BASE5,
-	};
-	static const u16 map32[] = {
-		BCM43xx_MMIO_DMA32_BASE0,
-		BCM43xx_MMIO_DMA32_BASE1,
-		BCM43xx_MMIO_DMA32_BASE2,
-		BCM43xx_MMIO_DMA32_BASE3,
-		BCM43xx_MMIO_DMA32_BASE4,
-		BCM43xx_MMIO_DMA32_BASE5,
-	};
-
-	if (dma64bit) {
-		assert(controller_idx >= 0 &&
-		       controller_idx < ARRAY_SIZE(map64));
-		return map64[controller_idx];
-	}
-	assert(controller_idx >= 0 &&
-	       controller_idx < ARRAY_SIZE(map32));
-	return map32[controller_idx];
-}
-
-static inline
-dma_addr_t map_descbuffer(struct bcm43xx_dmaring *ring,
-			  unsigned char *buf,
-			  size_t len,
-			  int tx)
-{
-	dma_addr_t dmaaddr;
-
-	if (tx) {
-		dmaaddr = dma_map_single(ring->dev->dev->dev,
-					 buf, len,
-					 DMA_TO_DEVICE);
-	} else {
-		dmaaddr = dma_map_single(ring->dev->dev->dev,
-					 buf, len,
-					 DMA_FROM_DEVICE);
-	}
-
-	return dmaaddr;
-}
-
-static inline
-void unmap_descbuffer(struct bcm43xx_dmaring *ring,
-		      dma_addr_t addr,
-		      size_t len,
-		      int tx)
-{
-	if (tx) {
-		dma_unmap_single(ring->dev->dev->dev,
-				 addr, len,
-				 DMA_TO_DEVICE);
-	} else {
-		dma_unmap_single(ring->dev->dev->dev,
-				 addr, len,
-				 DMA_FROM_DEVICE);
-	}
-}
-
-static inline
-void sync_descbuffer_for_cpu(struct bcm43xx_dmaring *ring,
-			     dma_addr_t addr,
-			     size_t len)
-{
-	assert(!ring->tx);
-
-	dma_sync_single_for_cpu(ring->dev->dev->dev,
-				addr, len, DMA_FROM_DEVICE);
-}
-
-static inline
-void sync_descbuffer_for_device(struct bcm43xx_dmaring *ring,
-				dma_addr_t addr,
-				size_t len)
-{
-	assert(!ring->tx);
-
-	dma_sync_single_for_device(ring->dev->dev->dev,
-				   addr, len, DMA_FROM_DEVICE);
-}
-
-static inline
-void free_descriptor_buffer(struct bcm43xx_dmaring *ring,
-			    struct bcm43xx_dmadesc_meta *meta,
-			    int irq_context)
-{
-	if (meta->skb) {
-		if (irq_context)
-			dev_kfree_skb_irq(meta->skb);
-		else
-			dev_kfree_skb(meta->skb);
-		meta->skb = NULL;
-	}
-}
-
-static int alloc_ringmemory(struct bcm43xx_dmaring *ring)
-{
-	struct device *dev = ring->dev->dev->dev;
-
-	ring->descbase = dma_alloc_coherent(dev, BCM43xx_DMA_RINGMEMSIZE,
-					    &(ring->dmabase), GFP_KERNEL);
-	if (!ring->descbase) {
-		printk(KERN_ERR PFX "DMA ringmemory allocation failed\n");
-		return -ENOMEM;
-	}
-	memset(ring->descbase, 0, BCM43xx_DMA_RINGMEMSIZE);
-
-	return 0;
-}
-
-static void free_ringmemory(struct bcm43xx_dmaring *ring)
-{
-	struct device *dev = ring->dev->dev->dev;
-
-	dma_free_coherent(dev, BCM43xx_DMA_RINGMEMSIZE,
-			  ring->descbase, ring->dmabase);
-}
-
-/* Reset the RX DMA channel */
-int bcm43xx_dmacontroller_rx_reset(struct bcm43xx_wldev *dev,
-				   u16 mmio_base, int dma64)
-{
-	int i;
-	u32 value;
-	u16 offset;
-
-	might_sleep();
-
-	offset = dma64 ? BCM43xx_DMA64_RXCTL : BCM43xx_DMA32_RXCTL;
-	bcm43xx_write32(dev, mmio_base + offset, 0);
-	for (i = 0; i < 10; i++) {
-		offset = dma64 ? BCM43xx_DMA64_RXSTATUS : BCM43xx_DMA32_RXSTATUS;
-		value = bcm43xx_read32(dev, mmio_base + offset);
-		if (dma64) {
-			value &= BCM43xx_DMA64_RXSTAT;
-			if (value == BCM43xx_DMA64_RXSTAT_DISABLED) {
-				i = -1;
-				break;
-			}
-		} else {
-			value &= BCM43xx_DMA32_RXSTATE;
-			if (value == BCM43xx_DMA32_RXSTAT_DISABLED) {
-				i = -1;
-				break;
-			}
-		}
-		msleep(1);
-	}
-	if (i != -1) {
-		printk(KERN_ERR PFX "ERROR: DMA RX reset timed out\n");
-		return -ENODEV;
-	}
-
-	return 0;
-}
-
-/* Reset the RX DMA channel */
-int bcm43xx_dmacontroller_tx_reset(struct bcm43xx_wldev *dev,
-				   u16 mmio_base, int dma64)
-{
-	int i;
-	u32 value;
-	u16 offset;
-
-	might_sleep();
-
-	for (i = 0; i < 10; i++) {
-		offset = dma64 ? BCM43xx_DMA64_TXSTATUS : BCM43xx_DMA32_TXSTATUS;
-		value = bcm43xx_read32(dev, mmio_base + offset);
-		if (dma64) {
-			value &= BCM43xx_DMA64_TXSTAT;
-			if (value == BCM43xx_DMA64_TXSTAT_DISABLED ||
-			    value == BCM43xx_DMA64_TXSTAT_IDLEWAIT ||
-			    value == BCM43xx_DMA64_TXSTAT_STOPPED)
-				break;
-		} else {
-			value &= BCM43xx_DMA32_TXSTATE;
-			if (value == BCM43xx_DMA32_TXSTAT_DISABLED ||
-			    value == BCM43xx_DMA32_TXSTAT_IDLEWAIT ||
-			    value == BCM43xx_DMA32_TXSTAT_STOPPED)
-				break;
-		}
-		msleep(1);
-	}
-	offset = dma64 ? BCM43xx_DMA64_TXCTL : BCM43xx_DMA32_TXCTL;
-	bcm43xx_write32(dev, mmio_base + offset, 0);
-	for (i = 0; i < 10; i++) {
-		offset = dma64 ? BCM43xx_DMA64_TXSTATUS : BCM43xx_DMA32_TXSTATUS;
-		value = bcm43xx_read32(dev, mmio_base + offset);
-		if (dma64) {
-			value &= BCM43xx_DMA64_TXSTAT;
-			if (value == BCM43xx_DMA64_TXSTAT_DISABLED) {
-				i = -1;
-				break;
-			}
-		} else {
-			value &= BCM43xx_DMA32_TXSTATE;
-			if (value == BCM43xx_DMA32_TXSTAT_DISABLED) {
-				i = -1;
-				break;
-			}
-		}
-		msleep(1);
-	}
-	if (i != -1) {
-		printk(KERN_ERR PFX "ERROR: DMA TX reset timed out\n");
-		return -ENODEV;
-	}
-	/* ensure the reset is completed. */
-	msleep(1);
-
-	return 0;
-}
-
-static int setup_rx_descbuffer(struct bcm43xx_dmaring *ring,
-			       struct bcm43xx_dmadesc_generic *desc,
-			       struct bcm43xx_dmadesc_meta *meta,
-			       gfp_t gfp_flags)
-{
-	struct bcm43xx_rxhdr_fw4 *rxhdr;
-	struct bcm43xx_hwtxstatus *txstat;
-	dma_addr_t dmaaddr;
-	struct sk_buff *skb;
-
-	assert(!ring->tx);
-
-	skb = __dev_alloc_skb(ring->rx_buffersize, gfp_flags);
-	if (unlikely(!skb))
-		return -ENOMEM;
-	dmaaddr = map_descbuffer(ring, skb->data,
-				 ring->rx_buffersize, 0);
-	if (dma_mapping_error(dmaaddr)) {
-		/* ugh. try to realloc in zone_dma */
-		gfp_flags |= GFP_DMA;
-
-		dev_kfree_skb_any(skb);
-
-		skb = __dev_alloc_skb(ring->rx_buffersize, gfp_flags);
-		if (unlikely(!skb))
-			return -ENOMEM;
-		dmaaddr = map_descbuffer(ring, skb->data,
-					 ring->rx_buffersize, 0);
-	}
-
-	if (dma_mapping_error(dmaaddr)) {
-		dev_kfree_skb_any(skb);
-		return -EIO;
-	}
-
-	meta->skb = skb;
-	meta->dmaaddr = dmaaddr;
-	ring->ops->fill_descriptor(ring, desc, dmaaddr,
-				   ring->rx_buffersize, 0, 0, 0);
-
-	rxhdr = (struct bcm43xx_rxhdr_fw4 *)(skb->data);
-	rxhdr->frame_len = 0;
-	txstat = (struct bcm43xx_hwtxstatus *)(skb->data);
-	txstat->cookie = 0;
-
-	return 0;
-}
-
-/* Allocate the initial descbuffers.
- * This is used for an RX ring only.
- */
-static int alloc_initial_descbuffers(struct bcm43xx_dmaring *ring)
-{
-	int i, err = -ENOMEM;
-	struct bcm43xx_dmadesc_generic *desc;
-	struct bcm43xx_dmadesc_meta *meta;
-
-	for (i = 0; i < ring->nr_slots; i++) {
-		desc = ring->ops->idx2desc(ring, i, &meta);
-
-		err = setup_rx_descbuffer(ring, desc, meta, GFP_KERNEL);
-		if (err) {
-			printk(KERN_ERR PFX "Failed to allocate initial descbuffers\n");
-			goto err_unwind;
-		}
-	}
-	mb();
-	ring->used_slots = ring->nr_slots;
-	err = 0;
-out:
-	return err;
-
-err_unwind:
-	for (i--; i >= 0; i--) {
-		desc = ring->ops->idx2desc(ring, i, &meta);
-
-		unmap_descbuffer(ring, meta->dmaaddr, ring->rx_buffersize, 0);
-		dev_kfree_skb(meta->skb);
-	}
-	goto out;
-}
-
-/* Do initial setup of the DMA controller.
- * Reset the controller, write the ring busaddress
- * and switch the "enable" bit on.
- */
-static int dmacontroller_setup(struct bcm43xx_dmaring *ring)
-{
-	int err = 0;
-	u32 value;
-	u32 addrext;
-	u32 trans = ssb_dma_translation(ring->dev->dev);
-
-	if (ring->tx) {
-		if (ring->dma64) {
-			u64 ringbase = (u64)(ring->dmabase);
-
-			addrext = ((ringbase >> 32) & SSB_DMA_TRANSLATION_MASK)
-				  >> SSB_DMA_TRANSLATION_SHIFT;
-			value = BCM43xx_DMA64_TXENABLE;
-			value |= (addrext << BCM43xx_DMA64_TXADDREXT_SHIFT)
-				& BCM43xx_DMA64_TXADDREXT_MASK;
-			bcm43xx_dma_write(ring, BCM43xx_DMA64_TXCTL, value);
-			bcm43xx_dma_write(ring, BCM43xx_DMA64_TXRINGLO,
-					(ringbase & 0xFFFFFFFF));
-			bcm43xx_dma_write(ring, BCM43xx_DMA64_TXRINGHI,
-					((ringbase >> 32) & ~SSB_DMA_TRANSLATION_MASK)
-					| trans);
-		} else {
-			u32 ringbase = (u32)(ring->dmabase);
-
-			addrext = (ringbase & SSB_DMA_TRANSLATION_MASK)
-				  >> SSB_DMA_TRANSLATION_SHIFT;
-			value = BCM43xx_DMA32_TXENABLE;
-			value |= (addrext << BCM43xx_DMA32_TXADDREXT_SHIFT)
-				& BCM43xx_DMA32_TXADDREXT_MASK;
-			bcm43xx_dma_write(ring, BCM43xx_DMA32_TXCTL, value);
-			bcm43xx_dma_write(ring, BCM43xx_DMA32_TXRING,
-					(ringbase & ~SSB_DMA_TRANSLATION_MASK)
-					| trans);
-		}
-	} else {
-		err = alloc_initial_descbuffers(ring);
-		if (err)
-			goto out;
-		if (ring->dma64) {
-			u64 ringbase = (u64)(ring->dmabase);
-
-			addrext = ((ringbase >> 32) & SSB_DMA_TRANSLATION_MASK)
-				  >> SSB_DMA_TRANSLATION_SHIFT;
-			value = (ring->frameoffset << BCM43xx_DMA64_RXFROFF_SHIFT);
-			value |= BCM43xx_DMA64_RXENABLE;
-			value |= (addrext << BCM43xx_DMA64_RXADDREXT_SHIFT)
-				& BCM43xx_DMA64_RXADDREXT_MASK;
-			bcm43xx_dma_write(ring, BCM43xx_DMA64_RXCTL, value);
-			bcm43xx_dma_write(ring, BCM43xx_DMA64_RXRINGLO,
-					(ringbase & 0xFFFFFFFF));
-			bcm43xx_dma_write(ring, BCM43xx_DMA64_RXRINGHI,
-					((ringbase >> 32) & ~SSB_DMA_TRANSLATION_MASK)
-					| trans);
-			bcm43xx_dma_write(ring, BCM43xx_DMA64_RXINDEX, 200);
-		} else {
-			u32 ringbase = (u32)(ring->dmabase);
-
-			addrext = (ringbase & SSB_DMA_TRANSLATION_MASK)
-				  >> SSB_DMA_TRANSLATION_SHIFT;
-			value = (ring->frameoffset << BCM43xx_DMA32_RXFROFF_SHIFT);
-			value |= BCM43xx_DMA32_RXENABLE;
-			value |= (addrext << BCM43xx_DMA32_RXADDREXT_SHIFT)
-				& BCM43xx_DMA32_RXADDREXT_MASK;
-			bcm43xx_dma_write(ring, BCM43xx_DMA32_RXCTL, value);
-			bcm43xx_dma_write(ring, BCM43xx_DMA32_RXRING,
-					(ringbase & ~SSB_DMA_TRANSLATION_MASK)
-					| trans);
-			bcm43xx_dma_write(ring, BCM43xx_DMA32_RXINDEX, 200);
-		}
-	}
-
-out:
-	return err;
-}
-
-/* Shutdown the DMA controller. */
-static void dmacontroller_cleanup(struct bcm43xx_dmaring *ring)
-{
-	if (ring->tx) {
-		bcm43xx_dmacontroller_tx_reset(ring->dev, ring->mmio_base, ring->dma64);
-		if (ring->dma64) {
-			bcm43xx_dma_write(ring, BCM43xx_DMA64_TXRINGLO, 0);
-			bcm43xx_dma_write(ring, BCM43xx_DMA64_TXRINGHI, 0);
-		} else
-			bcm43xx_dma_write(ring, BCM43xx_DMA32_TXRING, 0);
-	} else {
-		bcm43xx_dmacontroller_rx_reset(ring->dev, ring->mmio_base, ring->dma64);
-		if (ring->dma64) {
-			bcm43xx_dma_write(ring, BCM43xx_DMA64_RXRINGLO, 0);
-			bcm43xx_dma_write(ring, BCM43xx_DMA64_RXRINGHI, 0);
-		} else
-			bcm43xx_dma_write(ring, BCM43xx_DMA32_RXRING, 0);
-	}
-}
-
-static void free_all_descbuffers(struct bcm43xx_dmaring *ring)
-{
-	struct bcm43xx_dmadesc_generic *desc;
-	struct bcm43xx_dmadesc_meta *meta;
-	int i;
-
-	if (!ring->used_slots)
-		return;
-	for (i = 0; i < ring->nr_slots; i++) {
-		desc = ring->ops->idx2desc(ring, i, &meta);
-
-		if (!meta->skb) {
-			assert(ring->tx);
-			continue;
-		}
-		if (ring->tx) {
-			unmap_descbuffer(ring, meta->dmaaddr,
-					meta->skb->len, 1);
-		} else {
-			unmap_descbuffer(ring, meta->dmaaddr,
-					ring->rx_buffersize, 0);
-		}
-		free_descriptor_buffer(ring, meta, 0);
-	}
-}
-
-static u64 supported_dma_mask(struct bcm43xx_wldev *dev)
-{
-	u32 tmp;
-	u16 mmio_base;
-
-	tmp = bcm43xx_read32(dev, SSB_TMSHIGH);
-	if (tmp & SSB_TMSHIGH_DMA64)
-		return DMA_64BIT_MASK;
-	mmio_base = bcm43xx_dmacontroller_base(0, 0);
-	bcm43xx_write32(dev,
-			mmio_base + BCM43xx_DMA32_TXCTL,
-			BCM43xx_DMA32_TXADDREXT_MASK);
-	tmp = bcm43xx_read32(dev,
-			     mmio_base + BCM43xx_DMA32_TXCTL);
-	if (tmp & BCM43xx_DMA32_TXADDREXT_MASK)
-		return DMA_32BIT_MASK;
-
-	return DMA_30BIT_MASK;
-}
-
-/* Main initialization function. */
-static
-struct bcm43xx_dmaring * bcm43xx_setup_dmaring(struct bcm43xx_wldev *dev,
-					       int controller_index,
-					       int for_tx,
-					       int dma64)
-{
-	struct bcm43xx_dmaring *ring;
-	int err;
-	int nr_slots;
-	dma_addr_t dma_test;
-
-	ring = kzalloc(sizeof(*ring), GFP_KERNEL);
-	if (!ring)
-		goto out;
-
-	nr_slots = BCM43xx_RXRING_SLOTS;
-	if (for_tx)
-		nr_slots = BCM43xx_TXRING_SLOTS;
-
-	ring->meta = kcalloc(nr_slots, sizeof(struct bcm43xx_dmadesc_meta),
-			     GFP_KERNEL);
-	if (!ring->meta)
-		goto err_kfree_ring;
-	if (for_tx) {
-		ring->txhdr_cache = kcalloc(nr_slots,
-					    sizeof(struct bcm43xx_txhdr_fw4),
-					    GFP_KERNEL);
-		if (!ring->txhdr_cache)
-			goto err_kfree_meta;
-
-		/* test for ability to dma to txhdr_cache */
-		dma_test = dma_map_single(dev->dev->dev,
-				ring->txhdr_cache, sizeof(struct bcm43xx_txhdr_fw4),
-				DMA_TO_DEVICE);
-
-		if (dma_mapping_error(dma_test)) {
-			/* ugh realloc */
-			kfree(ring->txhdr_cache);
-			ring->txhdr_cache = kcalloc(nr_slots,
-							sizeof(struct bcm43xx_txhdr_fw4),
-							GFP_KERNEL | GFP_DMA);
-			if (!ring->txhdr_cache)
-				goto err_kfree_meta;
-
-			dma_test = dma_map_single(dev->dev->dev,
-					ring->txhdr_cache, sizeof(struct bcm43xx_txhdr_fw4),
-					DMA_TO_DEVICE);
-
-			if (dma_mapping_error(dma_test))
-				goto err_kfree_txhdr_cache;
-		}
-
-		dma_unmap_single(dev->dev->dev,
-				dma_test, sizeof(struct bcm43xx_txhdr_fw4),
-				DMA_TO_DEVICE);
-	}
-
-	ring->dev = dev;
-	ring->nr_slots = nr_slots;
-	ring->mmio_base = bcm43xx_dmacontroller_base(dma64, controller_index);
-	ring->index = controller_index;
-	ring->dma64 = !!dma64;
-	if (dma64)
-		ring->ops = &dma64_ops;
-	else
-		ring->ops = &dma32_ops;
-	if (for_tx) {
-		ring->tx = 1;
-		ring->current_slot = -1;
-	} else {
-		if (ring->index == 0) {
-			ring->rx_buffersize = BCM43xx_DMA0_RX_BUFFERSIZE;
-			ring->frameoffset = BCM43xx_DMA0_RX_FRAMEOFFSET;
-		} else if (ring->index == 3) {
-			ring->rx_buffersize = BCM43xx_DMA3_RX_BUFFERSIZE;
-			ring->frameoffset = BCM43xx_DMA3_RX_FRAMEOFFSET;
-		} else
-			assert(0);
-	}
-	spin_lock_init(&ring->lock);
-#ifdef CONFIG_BCM43XX_MAC80211_DEBUG
-	ring->last_injected_overflow = jiffies;
-#endif
-
-	err = alloc_ringmemory(ring);
-	if (err)
-		goto err_kfree_txhdr_cache;
-	err = dmacontroller_setup(ring);
-	if (err)
-		goto err_free_ringmemory;
-
-out:
-	return ring;
-
-err_free_ringmemory:
-	free_ringmemory(ring);
-err_kfree_txhdr_cache:
-	kfree(ring->txhdr_cache);
-err_kfree_meta:
-	kfree(ring->meta);
-err_kfree_ring:
-	kfree(ring);
-	ring = NULL;
-	goto out;
-}
-
-/* Main cleanup function. */
-static void bcm43xx_destroy_dmaring(struct bcm43xx_dmaring *ring)
-{
-	if (!ring)
-		return;
-
-	dprintk(KERN_INFO PFX "DMA-%s 0x%04X (%s) max used slots: %d/%d\n",
-		(ring->dma64) ? "64" : "32",
-		ring->mmio_base,
-		(ring->tx) ? "TX" : "RX",
-		ring->max_used_slots, ring->nr_slots);
-	/* Device IRQs are disabled prior entering this function,
-	 * so no need to take care of concurrency with rx handler stuff.
-	 */
-	dmacontroller_cleanup(ring);
-	free_all_descbuffers(ring);
-	free_ringmemory(ring);
-
-	kfree(ring->txhdr_cache);
-	kfree(ring->meta);
-	kfree(ring);
-}
-
-void bcm43xx_dma_free(struct bcm43xx_wldev *dev)
-{
-	struct bcm43xx_dma *dma;
-
-	if (bcm43xx_using_pio(dev))
-		return;
-	dma = &dev->dma;
-
-	bcm43xx_destroy_dmaring(dma->rx_ring3);
-	dma->rx_ring3 = NULL;
-	bcm43xx_destroy_dmaring(dma->rx_ring0);
-	dma->rx_ring0 = NULL;
-
-	bcm43xx_destroy_dmaring(dma->tx_ring5);
-	dma->tx_ring5 = NULL;
-	bcm43xx_destroy_dmaring(dma->tx_ring4);
-	dma->tx_ring4 = NULL;
-	bcm43xx_destroy_dmaring(dma->tx_ring3);
-	dma->tx_ring3 = NULL;
-	bcm43xx_destroy_dmaring(dma->tx_ring2);
-	dma->tx_ring2 = NULL;
-	bcm43xx_destroy_dmaring(dma->tx_ring1);
-	dma->tx_ring1 = NULL;
-	bcm43xx_destroy_dmaring(dma->tx_ring0);
-	dma->tx_ring0 = NULL;
-}
-
-int bcm43xx_dma_init(struct bcm43xx_wldev *dev)
-{
-	struct bcm43xx_dma *dma = &dev->dma;
-	struct bcm43xx_dmaring *ring;
-	int err;
-	u64 dmamask;
-	int dma64 = 0;
-
-	dmamask = supported_dma_mask(dev);
-	if (dmamask == DMA_64BIT_MASK)
-		dma64 = 1;
-
-	err = ssb_dma_set_mask(dev->dev, dmamask);
-	if (err) {
-#ifdef BCM43XX_MAC80211_PIO
-		printk(KERN_WARNING PFX "DMA for this device not supported. "
-					"Falling back to PIO\n");
-		dev->__using_pio = 1;
-		return -EAGAIN;
-#else
-		printk(KERN_ERR PFX "DMA for this device not supported and "
-				    "no PIO support compiled in\n");
-		return -EOPNOTSUPP;
-#endif
-	}
-
-	err = -ENOMEM;
-	/* setup TX DMA channels. */
-	ring = bcm43xx_setup_dmaring(dev, 0, 1, dma64);
-	if (!ring)
-		goto out;
-	dma->tx_ring0 = ring;
-
-	ring = bcm43xx_setup_dmaring(dev, 1, 1, dma64);
-	if (!ring)
-		goto err_destroy_tx0;
-	dma->tx_ring1 = ring;
-
-	ring = bcm43xx_setup_dmaring(dev, 2, 1, dma64);
-	if (!ring)
-		goto err_destroy_tx1;
-	dma->tx_ring2 = ring;
-
-	ring = bcm43xx_setup_dmaring(dev, 3, 1, dma64);
-	if (!ring)
-		goto err_destroy_tx2;
-	dma->tx_ring3 = ring;
-
-	ring = bcm43xx_setup_dmaring(dev, 4, 1, dma64);
-	if (!ring)
-		goto err_destroy_tx3;
-	dma->tx_ring4 = ring;
-
-	ring = bcm43xx_setup_dmaring(dev, 5, 1, dma64);
-	if (!ring)
-		goto err_destroy_tx4;
-	dma->tx_ring5 = ring;
-
-	/* setup RX DMA channels. */
-	ring = bcm43xx_setup_dmaring(dev, 0, 0, dma64);
-	if (!ring)
-		goto err_destroy_tx5;
-	dma->rx_ring0 = ring;
-
-	if (dev->dev->id.revision < 5) {
-		ring = bcm43xx_setup_dmaring(dev, 3, 0, dma64);
-		if (!ring)
-			goto err_destroy_rx0;
-		dma->rx_ring3 = ring;
-	}
-
-	dprintk(KERN_INFO PFX "%d-bit DMA initialized\n",
-		(dmamask == DMA_64BIT_MASK) ? 64 :
-		(dmamask == DMA_32BIT_MASK) ? 32 : 30);
-	err = 0;
-out:
-	return err;
-
-err_destroy_rx0:
-	bcm43xx_destroy_dmaring(dma->rx_ring0);
-	dma->rx_ring0 = NULL;
-err_destroy_tx5:
-	bcm43xx_destroy_dmaring(dma->tx_ring5);
-	dma->tx_ring5 = NULL;
-err_destroy_tx4:
-	bcm43xx_destroy_dmaring(dma->tx_ring4);
-	dma->tx_ring4 = NULL;
-err_destroy_tx3:
-	bcm43xx_destroy_dmaring(dma->tx_ring3);
-	dma->tx_ring3 = NULL;
-err_destroy_tx2:
-	bcm43xx_destroy_dmaring(dma->tx_ring2);
-	dma->tx_ring2 = NULL;
-err_destroy_tx1:
-	bcm43xx_destroy_dmaring(dma->tx_ring1);
-	dma->tx_ring1 = NULL;
-err_destroy_tx0:
-	bcm43xx_destroy_dmaring(dma->tx_ring0);
-	dma->tx_ring0 = NULL;
-	goto out;
-}
-
-/* Generate a cookie for the TX header. */
-static u16 generate_cookie(struct bcm43xx_dmaring *ring,
-			   int slot)
-{
-	u16 cookie = 0x1000;
-
-	/* Use the upper 4 bits of the cookie as
-	 * DMA controller ID and store the slot number
-	 * in the lower 12 bits.
-	 * Note that the cookie must never be 0, as this
-	 * is a special value used in RX path.
-	 */
-	switch (ring->index) {
-	case 0:
-		cookie = 0xA000;
-		break;
-	case 1:
-		cookie = 0xB000;
-		break;
-	case 2:
-		cookie = 0xC000;
-		break;
-	case 3:
-		cookie = 0xD000;
-		break;
-	case 4:
-		cookie = 0xE000;
-		break;
-	case 5:
-		cookie = 0xF000;
-		break;
-	}
-	assert(((u16)slot & 0xF000) == 0x0000);
-	cookie |= (u16)slot;
-
-	return cookie;
-}
-
-/* Inspect a cookie and find out to which controller/slot it belongs. */
-static
-struct bcm43xx_dmaring * parse_cookie(struct bcm43xx_wldev *dev,
-				      u16 cookie, int *slot)
-{
-	struct bcm43xx_dma *dma = &dev->dma;
-	struct bcm43xx_dmaring *ring = NULL;
-
-	switch (cookie & 0xF000) {
-	case 0xA000:
-		ring = dma->tx_ring0;
-		break;
-	case 0xB000:
-		ring = dma->tx_ring1;
-		break;
-	case 0xC000:
-		ring = dma->tx_ring2;
-		break;
-	case 0xD000:
-		ring = dma->tx_ring3;
-		break;
-	case 0xE000:
-		ring = dma->tx_ring4;
-		break;
-	case 0xF000:
-		ring = dma->tx_ring5;
-		break;
-	default:
-		assert(0);
-	}
-	*slot = (cookie & 0x0FFF);
-	assert(ring && *slot >= 0 && *slot < ring->nr_slots);
-
-	return ring;
-}
-
-static int dma_tx_fragment(struct bcm43xx_dmaring *ring,
-			    struct sk_buff *skb,
-			    struct ieee80211_tx_control *ctl)
-{
-	const struct bcm43xx_dma_ops *ops = ring->ops;
-	u8 *header;
-	int slot;
-	int err;
-	struct bcm43xx_dmadesc_generic *desc;
-	struct bcm43xx_dmadesc_meta *meta;
-	struct bcm43xx_dmadesc_meta *meta_hdr;
-	struct sk_buff *bounce_skb;
-
-#define SLOTS_PER_PACKET  2
-	assert(skb_shinfo(skb)->nr_frags == 0);
-
-	/* Get a slot for the header. */
-	slot = request_slot(ring);
-	desc = ops->idx2desc(ring, slot, &meta_hdr);
-	memset(meta_hdr, 0, sizeof(*meta_hdr));
-
-	header = &(ring->txhdr_cache[slot * sizeof(struct bcm43xx_txhdr_fw4)]);
-	bcm43xx_generate_txhdr(ring->dev, header,
-			       skb->data, skb->len, ctl,
-			       generate_cookie(ring, slot));
-
-	meta_hdr->dmaaddr = map_descbuffer(ring, (unsigned char *)header,
-				       sizeof(struct bcm43xx_txhdr_fw4), 1);
-	if (dma_mapping_error(meta_hdr->dmaaddr))
-		return -EIO;
-	ops->fill_descriptor(ring, desc, meta_hdr->dmaaddr,
-			     sizeof(struct bcm43xx_txhdr_fw4), 1, 0, 0);
-
-	/* Get a slot for the payload. */
-	slot = request_slot(ring);
-	desc = ops->idx2desc(ring, slot, &meta);
-	memset(meta, 0, sizeof(*meta));
-
-	memcpy(&meta->txstat.control, ctl, sizeof(*ctl));
-	meta->skb = skb;
-	meta->is_last_fragment = 1;
-
-	meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1);
-	/* create a bounce buffer in zone_dma on mapping failure. */
-	if (dma_mapping_error(meta->dmaaddr)) {
-		bounce_skb = __dev_alloc_skb(skb->len, GFP_ATOMIC | GFP_DMA);
-		if (!bounce_skb) {
-			err = -ENOMEM;
-			goto out_unmap_hdr;
-		}
-
-		memcpy(skb_put(bounce_skb, skb->len), skb->data, skb->len);
-		dev_kfree_skb_any(skb);
-		skb = bounce_skb;
-		meta->skb = skb;
-		meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1);
-		if (dma_mapping_error(meta->dmaaddr)) {
-			err = -EIO;
-			goto out_free_bounce;
-		}
-	}
-
-	ops->fill_descriptor(ring, desc, meta->dmaaddr,
-			     skb->len, 0, 1, 1);
-
-	/* Now transfer the whole frame. */
-	wmb();
-	ops->poke_tx(ring, next_slot(ring, slot));
-	return 0;
-
-out_free_bounce:
-	dev_kfree_skb_any(skb);
-out_unmap_hdr:
-	unmap_descbuffer(ring, meta_hdr->dmaaddr,
-			sizeof(struct bcm43xx_txhdr_fw4), 1);
-	return err;
-}
-
-static inline
-int should_inject_overflow(struct bcm43xx_dmaring *ring)
-{
-#ifdef CONFIG_BCM43XX_MAC80211_DEBUG
-	if (unlikely(bcm43xx_debug(ring->dev, BCM43xx_DBG_DMAOVERFLOW))) {
-		/* Check if we should inject another ringbuffer overflow
-		 * to test handling of this situation in the stack. */
-		unsigned long next_overflow;
-
-		next_overflow = ring->last_injected_overflow + HZ;
-		if (time_after(jiffies, next_overflow)) {
-			ring->last_injected_overflow = jiffies;
-			dprintk(KERN_DEBUG PFX "Injecting TX ring overflow on "
-				"DMA controller %d\n", ring->index);
-			return 1;
-		}
-	}
-#endif /* CONFIG_BCM43XX_MAC80211_DEBUG */
-	return 0;
-}
-
-int bcm43xx_dma_tx(struct bcm43xx_wldev *dev,
-		   struct sk_buff *skb,
-		   struct ieee80211_tx_control *ctl)
-{
-	struct bcm43xx_dmaring *ring;
-	int err = 0;
-	unsigned long flags;
-
-	ring = priority_to_txring(dev, ctl->queue);
-	spin_lock_irqsave(&ring->lock, flags);
-	assert(ring->tx);
-	if (unlikely(free_slots(ring) < SLOTS_PER_PACKET)) {
-		printkl(KERN_ERR PFX "DMA queue overflow\n");
-		err = -ENOSPC;
-		goto out_unlock;
-	}
-	/* Check if the queue was stopped in mac80211,
-	 * but we got called nevertheless.
-	 * That would be a mac80211 bug. */
-	assert(!ring->stopped);
-
-	err = dma_tx_fragment(ring, skb, ctl);
-	if (unlikely(err)) {
-		printkl(KERN_ERR PFX "DMA tx mapping failure\n");
-		goto out_unlock;
-	}
-	ring->nr_tx_packets++;
-	if ((free_slots(ring) < SLOTS_PER_PACKET) ||
-	    should_inject_overflow(ring)) {
-		/* This TX ring is full. */
-		ieee80211_stop_queue(dev->wl->hw, txring_to_priority(ring));
-		ring->stopped = 1;
-		if (bcm43xx_debug(dev, BCM43xx_DBG_DMAVERBOSE)) {
-			dprintk(KERN_DEBUG PFX "Stopped TX ring %d\n",
-				ring->index);
-		}
-	}
-out_unlock:
-	spin_unlock_irqrestore(&ring->lock, flags);
-
-	return err;
-}
-
-void bcm43xx_dma_handle_txstatus(struct bcm43xx_wldev *dev,
-				 const struct bcm43xx_txstatus *status)
-{
-	const struct bcm43xx_dma_ops *ops;
-	struct bcm43xx_dmaring *ring;
-	struct bcm43xx_dmadesc_generic *desc;
-	struct bcm43xx_dmadesc_meta *meta;
-	int slot;
-
-	ring = parse_cookie(dev, status->cookie, &slot);
-	if (unlikely(!ring))
-		return;
-	assert(irqs_disabled());
-	spin_lock(&ring->lock);
-
-	assert(ring->tx);
-	ops = ring->ops;
-	while (1) {
-		assert(slot >= 0 && slot < ring->nr_slots);
-		desc = ops->idx2desc(ring, slot, &meta);
-
-		if (meta->skb)
-			unmap_descbuffer(ring, meta->dmaaddr, meta->skb->len, 1);
-		else
-			unmap_descbuffer(ring, meta->dmaaddr, sizeof(struct bcm43xx_txhdr_fw4), 1);
-
-		if (meta->is_last_fragment) {
-			assert(meta->skb);
-			/* Call back to inform the ieee80211 subsystem about the
-			 * status of the transmission.
-			 * Some fields of txstat are already filled in dma_tx().
-			 */
-			if (status->acked)
-				meta->txstat.flags |= IEEE80211_TX_STATUS_ACK;
-			meta->txstat.retry_count = status->frame_count - 1;
-			ieee80211_tx_status_irqsafe(dev->wl->hw, meta->skb, &(meta->txstat));
-			/* skb is freed by ieee80211_tx_status_irqsafe() */
-			meta->skb = NULL;
-		} else {
-			/* No need to call free_descriptor_buffer here, as
-			 * this is only the txhdr, which is not allocated.
-			 */
-			assert(meta->skb == NULL);
-		}
-
-		/* Everything unmapped and free'd. So it's not used anymore. */
-		ring->used_slots--;
-
-		if (meta->is_last_fragment)
-			break;
-		slot = next_slot(ring, slot);
-	}
-	dev->stats.last_tx = jiffies;
-	if (ring->stopped) {
-		assert(free_slots(ring) >= SLOTS_PER_PACKET);
-		ieee80211_wake_queue(dev->wl->hw, txring_to_priority(ring));
-		ring->stopped = 0;
-		if (bcm43xx_debug(dev, BCM43xx_DBG_DMAVERBOSE)) {
-			dprintk(KERN_DEBUG PFX "Woke up TX ring %d\n",
-				ring->index);
-		}
-	}
-
-	spin_unlock(&ring->lock);
-}
-
-void bcm43xx_dma_get_tx_stats(struct bcm43xx_wldev *dev,
-			      struct ieee80211_tx_queue_stats *stats)
-{
-	const int nr_queues = dev->wl->hw->queues;
-	struct bcm43xx_dmaring *ring;
-	struct ieee80211_tx_queue_stats_data *data;
-	unsigned long flags;
-	int i;
-
-	for (i = 0; i < nr_queues; i++) {
-		data = &(stats->data[i]);
-		ring = priority_to_txring(dev, i);
-
-		spin_lock_irqsave(&ring->lock, flags);
-		data->len = ring->used_slots / SLOTS_PER_PACKET;
-		data->limit = ring->nr_slots / SLOTS_PER_PACKET;
-		data->count = ring->nr_tx_packets;
-		spin_unlock_irqrestore(&ring->lock, flags);
-	}
-}
-
-static void dma_rx(struct bcm43xx_dmaring *ring,
-		   int *slot)
-{
-	const struct bcm43xx_dma_ops *ops = ring->ops;
-	struct bcm43xx_dmadesc_generic *desc;
-	struct bcm43xx_dmadesc_meta *meta;
-	struct bcm43xx_rxhdr_fw4 *rxhdr;
-	struct sk_buff *skb;
-	u16 len;
-	int err;
-	dma_addr_t dmaaddr;
-
-	desc = ops->idx2desc(ring, *slot, &meta);
-
-	sync_descbuffer_for_cpu(ring, meta->dmaaddr, ring->rx_buffersize);
-	skb = meta->skb;
-
-	if (ring->index == 3) {
-		/* We received an xmit status. */
-		struct bcm43xx_hwtxstatus *hw = (struct bcm43xx_hwtxstatus *)skb->data;
-		int i = 0;
-
-		while (hw->cookie == 0) {
-			if (i > 100)
-				break;
-			i++;
-			udelay(2);
-			barrier();
-		}
-		bcm43xx_handle_hwtxstatus(ring->dev, hw);
-		/* recycle the descriptor buffer. */
-		sync_descbuffer_for_device(ring, meta->dmaaddr, ring->rx_buffersize);
-
-		return;
-	}
-	rxhdr = (struct bcm43xx_rxhdr_fw4 *)skb->data;
-	len = le16_to_cpu(rxhdr->frame_len);
-	if (len == 0) {
-		int i = 0;
-
-		do {
-			udelay(2);
-			barrier();
-			len = le16_to_cpu(rxhdr->frame_len);
-		} while (len == 0 && i++ < 5);
-		if (unlikely(len == 0)) {
-			/* recycle the descriptor buffer. */
-			sync_descbuffer_for_device(ring, meta->dmaaddr,
-						   ring->rx_buffersize);
-			goto drop;
-		}
-	}
-	if (unlikely(len > ring->rx_buffersize)) {
-		/* The data did not fit into one descriptor buffer
-		 * and is split over multiple buffers.
-		 * This should never happen, as we try to allocate buffers
-		 * big enough. So simply ignore this packet.
-		 */
-		int cnt = 0;
-		s32 tmp = len;
-
-		while (1) {
-			desc = ops->idx2desc(ring, *slot, &meta);
-			/* recycle the descriptor buffer. */
-			sync_descbuffer_for_device(ring, meta->dmaaddr,
-						   ring->rx_buffersize);
-			*slot = next_slot(ring, *slot);
-			cnt++;
-			tmp -= ring->rx_buffersize;
-			if (tmp <= 0)
-				break;
-		}
-		printkl(KERN_ERR PFX "DMA RX buffer too small "
-			"(len: %u, buffer: %u, nr-dropped: %d)\n",
-			len, ring->rx_buffersize, cnt);
-		goto drop;
-	}
-
-	dmaaddr = meta->dmaaddr;
-	err = setup_rx_descbuffer(ring, desc, meta, GFP_ATOMIC);
-	if (unlikely(err)) {
-		dprintkl(KERN_ERR PFX "DMA RX: setup_rx_descbuffer() failed\n");
-		sync_descbuffer_for_device(ring, dmaaddr,
-					   ring->rx_buffersize);
-		goto drop;
-	}
-
-	unmap_descbuffer(ring, dmaaddr, ring->rx_buffersize, 0);
-	skb_put(skb, len + ring->frameoffset);
-	skb_pull(skb, ring->frameoffset);
-
-	bcm43xx_rx(ring->dev, skb, rxhdr);
-drop:
-	return;
-}
-
-void bcm43xx_dma_rx(struct bcm43xx_dmaring *ring)
-{
-	const struct bcm43xx_dma_ops *ops = ring->ops;
-	int slot, current_slot;
-	int used_slots = 0;
-
-	assert(!ring->tx);
-	current_slot = ops->get_current_rxslot(ring);
-	assert(current_slot >= 0 && current_slot < ring->nr_slots);
-
-	slot = ring->current_slot;
-	for ( ; slot != current_slot; slot = next_slot(ring, slot)) {
-		dma_rx(ring, &slot);
-		update_max_used_slots(ring, ++used_slots);
-	}
-	ops->set_current_rxslot(ring, slot);
-	ring->current_slot = slot;
-}
-
-static void bcm43xx_dma_tx_suspend_ring(struct bcm43xx_dmaring *ring)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&ring->lock, flags);
-	assert(ring->tx);
-	ring->ops->tx_suspend(ring);
-	spin_unlock_irqrestore(&ring->lock, flags);
-}
-
-static void bcm43xx_dma_tx_resume_ring(struct bcm43xx_dmaring *ring)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&ring->lock, flags);
-	assert(ring->tx);
-	ring->ops->tx_resume(ring);
-	spin_unlock_irqrestore(&ring->lock, flags);
-}
-
-void bcm43xx_dma_tx_suspend(struct bcm43xx_wldev *dev)
-{
-	bcm43xx_power_saving_ctl_bits(dev, -1, 1);
-	bcm43xx_dma_tx_suspend_ring(dev->dma.tx_ring0);
-	bcm43xx_dma_tx_suspend_ring(dev->dma.tx_ring1);
-	bcm43xx_dma_tx_suspend_ring(dev->dma.tx_ring2);
-	bcm43xx_dma_tx_suspend_ring(dev->dma.tx_ring3);
-	bcm43xx_dma_tx_suspend_ring(dev->dma.tx_ring4);
-	bcm43xx_dma_tx_suspend_ring(dev->dma.tx_ring5);
-}
-
-void bcm43xx_dma_tx_resume(struct bcm43xx_wldev *dev)
-{
-	bcm43xx_dma_tx_resume_ring(dev->dma.tx_ring5);
-	bcm43xx_dma_tx_resume_ring(dev->dma.tx_ring4);
-	bcm43xx_dma_tx_resume_ring(dev->dma.tx_ring3);
-	bcm43xx_dma_tx_resume_ring(dev->dma.tx_ring2);
-	bcm43xx_dma_tx_resume_ring(dev->dma.tx_ring1);
-	bcm43xx_dma_tx_resume_ring(dev->dma.tx_ring0);
-	bcm43xx_power_saving_ctl_bits(dev, -1, -1);
-}