コード例 #1
0
ファイル: pio.c プロジェクト: AdrianHuang/uclinux-robutest
void b43_pio_handle_txstatus(struct b43_wldev *dev,
			     const struct b43_txstatus *status)
{
	struct b43_pio_txqueue *q;
	struct b43_pio_txpacket *pack = NULL;
	unsigned int total_len;
	struct ieee80211_tx_info *info;

	q = parse_cookie(dev, status->cookie, &pack);
	if (unlikely(!q))
		return;
	B43_WARN_ON(!pack);

	info = IEEE80211_SKB_CB(pack->skb);

	b43_fill_txstatus_report(dev, info, status);

	total_len = pack->skb->len + b43_txhdr_size(dev);
	total_len = roundup(total_len, 4);
	q->buffer_used -= total_len;
	q->free_packet_slots += 1;

	ieee80211_tx_status(dev->wl->hw, pack->skb);
	pack->skb = NULL;
	list_add(&pack->list, &q->packets_list);

	if (q->stopped) {
		ieee80211_wake_queue(dev->wl->hw, q->queue_prio);
		q->stopped = 0;
	}
}
コード例 #2
0
ファイル: pio.c プロジェクト: AdrianHuang/uclinux-robutest
static int pio_tx_frame(struct b43_pio_txqueue *q,
			struct sk_buff *skb)
{
	struct b43_wldev *dev = q->dev;
	struct b43_wl *wl = dev->wl;
	struct b43_pio_txpacket *pack;
	u16 cookie;
	int err;
	unsigned int hdrlen;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct b43_txhdr *txhdr = (struct b43_txhdr *)wl->pio_scratchspace;

	B43_WARN_ON(list_empty(&q->packets_list));
	pack = list_entry(q->packets_list.next,
			  struct b43_pio_txpacket, list);

	cookie = generate_cookie(q, pack);
	hdrlen = b43_txhdr_size(dev);
	BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(struct b43_txhdr));
	B43_WARN_ON(sizeof(wl->pio_scratchspace) < hdrlen);
	err = b43_generate_txhdr(dev, (u8 *)txhdr, skb,
				 info, cookie);
	if (err)
		return err;

	if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
		/* Tell the firmware about the cookie of the last
		 * mcast frame, so it can clear the more-data bit in it. */
		b43_shm_write16(dev, B43_SHM_SHARED,
				B43_SHM_SH_MCASTCOOKIE, cookie);
	}

	pack->skb = skb;
	if (q->rev >= 8)
		pio_tx_frame_4byte_queue(pack, (const u8 *)txhdr, hdrlen);
	else
		pio_tx_frame_2byte_queue(pack, (const u8 *)txhdr, hdrlen);

	/* Remove it from the list of available packet slots.
	 * It will be put back when we receive the status report. */
	list_del(&pack->list);

	/* Update the queue statistics. */
	q->buffer_used += roundup(skb->len + hdrlen, 4);
	q->free_packet_slots -= 1;

	return 0;
}
コード例 #3
0
static int pio_tx_frame(struct b43_pio_txqueue *q,
			struct sk_buff *skb)
{
	struct b43_wldev *dev = q->dev;
	struct b43_wl *wl = dev->wl;
	struct b43_pio_txpacket *pack;
	u16 cookie;
	int err;
	unsigned int hdrlen;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct b43_txhdr *txhdr = (struct b43_txhdr *)wl->pio_scratchspace;

	B43_WARN_ON(list_empty(&q->packets_list));
	pack = list_entry(q->packets_list.next,
			  struct b43_pio_txpacket, list);

	cookie = generate_cookie(q, pack);
	hdrlen = b43_txhdr_size(dev);
	BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(struct b43_txhdr));
	B43_WARN_ON(sizeof(wl->pio_scratchspace) < hdrlen);
	err = b43_generate_txhdr(dev, (u8 *)txhdr, skb,
				 info, cookie);
	if (err)
		return err;

	if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
		b43_shm_write16(dev, B43_SHM_SHARED,
				B43_SHM_SH_MCASTCOOKIE, cookie);
	}

	pack->skb = skb;
	if (q->rev >= 8)
		pio_tx_frame_4byte_queue(pack, (const u8 *)txhdr, hdrlen);
	else
		pio_tx_frame_2byte_queue(pack, (const u8 *)txhdr, hdrlen);

	list_del(&pack->list);

	
	q->buffer_used += roundup(skb->len + hdrlen, 4);
	q->free_packet_slots -= 1;

	return 0;
}
コード例 #4
0
ファイル: dma.c プロジェクト: EvolutionMod/ath10-lenovo
/* Main initialization function. */
static
struct b43_dmaring *b43_setup_dmaring(struct b43_wldev *dev,
				      int controller_index,
				      int for_tx,
				      enum b43_dmatype type)
{
	struct b43_dmaring *ring;
	int i, err;
	dma_addr_t dma_test;

	ring = kzalloc(sizeof(*ring), GFP_KERNEL);
	if (!ring)
		goto out;

	ring->nr_slots = B43_RXRING_SLOTS;
	if (for_tx)
		ring->nr_slots = B43_TXRING_SLOTS;

	ring->meta = kcalloc(ring->nr_slots, sizeof(struct b43_dmadesc_meta),
			     GFP_KERNEL);
	if (!ring->meta)
		goto err_kfree_ring;
	for (i = 0; i < ring->nr_slots; i++)
		ring->meta->skb = B43_DMA_PTR_POISON;

	ring->type = type;
	ring->dev = dev;
	ring->mmio_base = b43_dmacontroller_base(type, controller_index);
	ring->index = controller_index;
	if (type == B43_DMA_64BIT)
		ring->ops = &dma64_ops;
	else
		ring->ops = &dma32_ops;
	if (for_tx) {
		ring->tx = true;
		ring->current_slot = -1;
	} else {
		if (ring->index == 0) {
			switch (dev->fw.hdr_format) {
			case B43_FW_HDR_598:
				ring->rx_buffersize = B43_DMA0_RX_FW598_BUFSIZE;
				ring->frameoffset = B43_DMA0_RX_FW598_FO;
				break;
			case B43_FW_HDR_410:
			case B43_FW_HDR_351:
				ring->rx_buffersize = B43_DMA0_RX_FW351_BUFSIZE;
				ring->frameoffset = B43_DMA0_RX_FW351_FO;
				break;
			}
		} else
			B43_WARN_ON(1);
	}
#ifdef CPTCFG_B43_DEBUG
	ring->last_injected_overflow = jiffies;
#endif

	if (for_tx) {
		/* Assumption: B43_TXRING_SLOTS can be divided by TX_SLOTS_PER_FRAME */
		BUILD_BUG_ON(B43_TXRING_SLOTS % TX_SLOTS_PER_FRAME != 0);

		ring->txhdr_cache = kcalloc(ring->nr_slots / TX_SLOTS_PER_FRAME,
					    b43_txhdr_size(dev),
					    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->dma_dev,
					  ring->txhdr_cache,
					  b43_txhdr_size(dev),
					  DMA_TO_DEVICE);

		if (b43_dma_mapping_error(ring, dma_test,
					  b43_txhdr_size(dev), 1)) {
			/* ugh realloc */
			kfree(ring->txhdr_cache);
			ring->txhdr_cache = kcalloc(ring->nr_slots / TX_SLOTS_PER_FRAME,
						    b43_txhdr_size(dev),
						    GFP_KERNEL | GFP_DMA);
			if (!ring->txhdr_cache)
				goto err_kfree_meta;

			dma_test = dma_map_single(dev->dev->dma_dev,
						  ring->txhdr_cache,
						  b43_txhdr_size(dev),
						  DMA_TO_DEVICE);

			if (b43_dma_mapping_error(ring, dma_test,
						  b43_txhdr_size(dev), 1)) {

				b43err(dev->wl,
				       "TXHDR DMA allocation failed\n");
				goto err_kfree_txhdr_cache;
			}
		}

		dma_unmap_single(dev->dev->dma_dev,
				 dma_test, b43_txhdr_size(dev),
				 DMA_TO_DEVICE);
	}

	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;
}
コード例 #5
0
ファイル: dma.c プロジェクト: EvolutionMod/ath10-lenovo
void b43_dma_handle_txstatus(struct b43_wldev *dev,
			     const struct b43_txstatus *status)
{
	const struct b43_dma_ops *ops;
	struct b43_dmaring *ring;
	struct b43_dmadesc_meta *meta;
	static const struct b43_txstatus fake; /* filled with 0 */
	const struct b43_txstatus *txstat;
	int slot, firstused;
	bool frame_succeed;
	int skip;
	static u8 err_out1, err_out2;

	ring = parse_cookie(dev, status->cookie, &slot);
	if (unlikely(!ring))
		return;
	B43_WARN_ON(!ring->tx);

	/* Sanity check: TX packets are processed in-order on one ring.
	 * Check if the slot deduced from the cookie really is the first
	 * used slot. */
	firstused = ring->current_slot - ring->used_slots + 1;
	if (firstused < 0)
		firstused = ring->nr_slots + firstused;

	skip = 0;
	if (unlikely(slot != firstused)) {
		/* This possibly is a firmware bug and will result in
		 * malfunction, memory leaks and/or stall of DMA functionality.
		 */
		if (slot == next_slot(ring, next_slot(ring, firstused))) {
			/* If a single header/data pair was missed, skip over
			 * the first two slots in an attempt to recover.
			 */
			slot = firstused;
			skip = 2;
			if (!err_out1) {
				/* Report the error once. */
				b43dbg(dev->wl,
				       "Skip on DMA ring %d slot %d.\n",
				       ring->index, slot);
				err_out1 = 1;
			}
		} else {
			/* More than a single header/data pair were missed.
			 * Report this error once.
			 */
			if (!err_out2)
				b43dbg(dev->wl,
				       "Out of order TX status report on DMA ring %d. Expected %d, but got %d\n",
				       ring->index, firstused, slot);
			err_out2 = 1;
			return;
		}
	}

	ops = ring->ops;
	while (1) {
		B43_WARN_ON(slot < 0 || slot >= ring->nr_slots);
		/* get meta - ignore returned value */
		ops->idx2desc(ring, slot, &meta);

		if (b43_dma_ptr_is_poisoned(meta->skb)) {
			b43dbg(dev->wl, "Poisoned TX slot %d (first=%d) "
			       "on ring %d\n",
			       slot, firstused, ring->index);
			break;
		}

		if (meta->skb) {
			struct b43_private_tx_info *priv_info =
			     b43_get_priv_tx_info(IEEE80211_SKB_CB(meta->skb));

			unmap_descbuffer(ring, meta->dmaaddr,
					 meta->skb->len, 1);
			kfree(priv_info->bouncebuffer);
			priv_info->bouncebuffer = NULL;
		} else {
			unmap_descbuffer(ring, meta->dmaaddr,
					 b43_txhdr_size(dev), 1);
		}

		if (meta->is_last_fragment) {
			struct ieee80211_tx_info *info;

			if (unlikely(!meta->skb)) {
				/* This is a scatter-gather fragment of a frame,
				 * so the skb pointer must not be NULL.
				 */
				b43dbg(dev->wl, "TX status unexpected NULL skb "
				       "at slot %d (first=%d) on ring %d\n",
				       slot, firstused, ring->index);
				break;
			}

			info = IEEE80211_SKB_CB(meta->skb);

			/*
			 * Call back to inform the ieee80211 subsystem about
			 * the status of the transmission. When skipping over
			 * a missed TX status report, use a status structure
			 * filled with zeros to indicate that the frame was not
			 * sent (frame_count 0) and not acknowledged
			 */
			if (unlikely(skip))
				txstat = &fake;
			else
				txstat = status;

			frame_succeed = b43_fill_txstatus_report(dev, info,
								 txstat);
#ifdef CPTCFG_B43_DEBUG
			if (frame_succeed)
				ring->nr_succeed_tx_packets++;
			else
				ring->nr_failed_tx_packets++;
			ring->nr_total_packet_tries += status->frame_count;
#endif /* DEBUG */
			ieee80211_tx_status(dev->wl->hw, meta->skb);

			/* skb will be freed by ieee80211_tx_status().
			 * Poison our pointer. */
			meta->skb = B43_DMA_PTR_POISON;
		} else {
			/* No need to call free_descriptor_buffer here, as
			 * this is only the txhdr, which is not allocated.
			 */
			if (unlikely(meta->skb)) {
				b43dbg(dev->wl, "TX status unexpected non-NULL skb "
				       "at slot %d (first=%d) on ring %d\n",
				       slot, firstused, ring->index);
				break;
			}
		}

		/* Everything unmapped and free'd. So it's not used anymore. */
		ring->used_slots--;

		if (meta->is_last_fragment && !skip) {
			/* This is the last scatter-gather
			 * fragment of the frame. We are done. */
			break;
		}
		slot = next_slot(ring, slot);
		if (skip > 0)
			--skip;
	}
	if (ring->stopped) {
		B43_WARN_ON(free_slots(ring) < TX_SLOTS_PER_FRAME);
		ring->stopped = false;
	}

	if (dev->wl->tx_queue_stopped[ring->queue_prio]) {
		dev->wl->tx_queue_stopped[ring->queue_prio] = 0;
	} else {
		/* If the driver queue is running wake the corresponding
		 * mac80211 queue. */
		ieee80211_wake_queue(dev->wl->hw, ring->queue_prio);
		if (b43_debug(dev, B43_DBG_DMAVERBOSE)) {
			b43dbg(dev->wl, "Woke up TX ring %d\n", ring->index);
		}
	}
	/* Add work to the queue. */
	ieee80211_queue_work(dev->wl->hw, &dev->wl->tx_work);
}
コード例 #6
0
ファイル: dma.c プロジェクト: EvolutionMod/ath10-lenovo
static int dma_tx_fragment(struct b43_dmaring *ring,
			   struct sk_buff *skb)
{
	const struct b43_dma_ops *ops = ring->ops;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct b43_private_tx_info *priv_info = b43_get_priv_tx_info(info);
	u8 *header;
	int slot, old_top_slot, old_used_slots;
	int err;
	struct b43_dmadesc_generic *desc;
	struct b43_dmadesc_meta *meta;
	struct b43_dmadesc_meta *meta_hdr;
	u16 cookie;
	size_t hdrsize = b43_txhdr_size(ring->dev);

	/* Important note: If the number of used DMA slots per TX frame
	 * is changed here, the TX_SLOTS_PER_FRAME definition at the top of
	 * the file has to be updated, too!
	 */

	old_top_slot = ring->current_slot;
	old_used_slots = ring->used_slots;

	/* 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 / TX_SLOTS_PER_FRAME) * hdrsize]);
	cookie = generate_cookie(ring, slot);
	err = b43_generate_txhdr(ring->dev, header,
				 skb, info, cookie);
	if (unlikely(err)) {
		ring->current_slot = old_top_slot;
		ring->used_slots = old_used_slots;
		return err;
	}

	meta_hdr->dmaaddr = map_descbuffer(ring, (unsigned char *)header,
					   hdrsize, 1);
	if (b43_dma_mapping_error(ring, meta_hdr->dmaaddr, hdrsize, 1)) {
		ring->current_slot = old_top_slot;
		ring->used_slots = old_used_slots;
		return -EIO;
	}
	ops->fill_descriptor(ring, desc, meta_hdr->dmaaddr,
			     hdrsize, 1, 0, 0);

	/* Get a slot for the payload. */
	slot = request_slot(ring);
	desc = ops->idx2desc(ring, slot, &meta);
	memset(meta, 0, sizeof(*meta));

	meta->skb = skb;
	meta->is_last_fragment = true;
	priv_info->bouncebuffer = NULL;

	meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1);
	/* create a bounce buffer in zone_dma on mapping failure. */
	if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len, 1)) {
		priv_info->bouncebuffer = kmemdup(skb->data, skb->len,
						  GFP_ATOMIC | GFP_DMA);
		if (!priv_info->bouncebuffer) {
			ring->current_slot = old_top_slot;
			ring->used_slots = old_used_slots;
			err = -ENOMEM;
			goto out_unmap_hdr;
		}

		meta->dmaaddr = map_descbuffer(ring, priv_info->bouncebuffer, skb->len, 1);
		if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len, 1)) {
			kfree(priv_info->bouncebuffer);
			priv_info->bouncebuffer = NULL;
			ring->current_slot = old_top_slot;
			ring->used_slots = old_used_slots;
			err = -EIO;
			goto out_unmap_hdr;
		}
	}

	ops->fill_descriptor(ring, desc, meta->dmaaddr, skb->len, 0, 1, 1);

	if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
		/* Tell the firmware about the cookie of the last
		 * mcast frame, so it can clear the more-data bit in it. */
		b43_shm_write16(ring->dev, B43_SHM_SHARED,
				B43_SHM_SH_MCASTCOOKIE, cookie);
	}
	/* Now transfer the whole frame. */
	wmb();
	ops->poke_tx(ring, next_slot(ring, slot));
	return 0;

out_unmap_hdr:
	unmap_descbuffer(ring, meta_hdr->dmaaddr,
			 hdrsize, 1);
	return err;
}
コード例 #7
0
ファイル: pio.c プロジェクト: AdrianHuang/uclinux-robutest
int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
{
	struct b43_pio_txqueue *q;
	struct ieee80211_hdr *hdr;
	unsigned int hdrlen, total_len;
	int err = 0;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);

	hdr = (struct ieee80211_hdr *)skb->data;

	if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
		/* The multicast queue will be sent after the DTIM. */
		q = dev->pio.tx_queue_mcast;
		/* Set the frame More-Data bit. Ucode will clear it
		 * for us on the last frame. */
		hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
	} else {
		/* Decide by priority where to put this frame. */
		q = select_queue_by_priority(dev, skb_get_queue_mapping(skb));
	}

	hdrlen = b43_txhdr_size(dev);
	total_len = roundup(skb->len + hdrlen, 4);

	if (unlikely(total_len > q->buffer_size)) {
		err = -ENOBUFS;
		b43dbg(dev->wl, "PIO: TX packet longer than queue.\n");
		goto out;
	}
	if (unlikely(q->free_packet_slots == 0)) {
		err = -ENOBUFS;
		b43warn(dev->wl, "PIO: TX packet overflow.\n");
		goto out;
	}
	B43_WARN_ON(q->buffer_used > q->buffer_size);

	if (total_len > (q->buffer_size - q->buffer_used)) {
		/* Not enough memory on the queue. */
		err = -EBUSY;
		ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb));
		q->stopped = 1;
		goto out;
	}

	/* Assign the queue number to the ring (if not already done before)
	 * so TX status handling can use it. The mac80211-queue to b43-queue
	 * mapping is static, so we don't need to store it per frame. */
	q->queue_prio = skb_get_queue_mapping(skb);

	err = pio_tx_frame(q, skb);
	if (unlikely(err == -ENOKEY)) {
		/* Drop this packet, as we don't have the encryption key
		 * anymore and must not transmit it unencrypted. */
		dev_kfree_skb_any(skb);
		err = 0;
		goto out;
	}
	if (unlikely(err)) {
		b43err(dev->wl, "PIO transmission failure\n");
		goto out;
	}
	q->nr_tx_packets++;

	B43_WARN_ON(q->buffer_used > q->buffer_size);
	if (((q->buffer_size - q->buffer_used) < roundup(2 + 2 + 6, 4)) ||
	    (q->free_packet_slots == 0)) {
		/* The queue is full. */
		ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb));
		q->stopped = 1;
	}

out:
	return err;
}
コード例 #8
0
ファイル: dma.c プロジェクト: mjduddin/B14CKB1RD_kernel_m8
static int dma_tx_fragment(struct b43_dmaring *ring,
			   struct sk_buff *skb)
{
	const struct b43_dma_ops *ops = ring->ops;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct b43_private_tx_info *priv_info = b43_get_priv_tx_info(info);
	u8 *header;
	int slot, old_top_slot, old_used_slots;
	int err;
	struct b43_dmadesc_generic *desc;
	struct b43_dmadesc_meta *meta;
	struct b43_dmadesc_meta *meta_hdr;
	u16 cookie;
	size_t hdrsize = b43_txhdr_size(ring->dev);


	old_top_slot = ring->current_slot;
	old_used_slots = ring->used_slots;

	
	slot = request_slot(ring);
	desc = ops->idx2desc(ring, slot, &meta_hdr);
	memset(meta_hdr, 0, sizeof(*meta_hdr));

	header = &(ring->txhdr_cache[(slot / TX_SLOTS_PER_FRAME) * hdrsize]);
	cookie = generate_cookie(ring, slot);
	err = b43_generate_txhdr(ring->dev, header,
				 skb, info, cookie);
	if (unlikely(err)) {
		ring->current_slot = old_top_slot;
		ring->used_slots = old_used_slots;
		return err;
	}

	meta_hdr->dmaaddr = map_descbuffer(ring, (unsigned char *)header,
					   hdrsize, 1);
	if (b43_dma_mapping_error(ring, meta_hdr->dmaaddr, hdrsize, 1)) {
		ring->current_slot = old_top_slot;
		ring->used_slots = old_used_slots;
		return -EIO;
	}
	ops->fill_descriptor(ring, desc, meta_hdr->dmaaddr,
			     hdrsize, 1, 0, 0);

	
	slot = request_slot(ring);
	desc = ops->idx2desc(ring, slot, &meta);
	memset(meta, 0, sizeof(*meta));

	meta->skb = skb;
	meta->is_last_fragment = true;
	priv_info->bouncebuffer = NULL;

	meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1);
	
	if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len, 1)) {
		priv_info->bouncebuffer = kmemdup(skb->data, skb->len,
						  GFP_ATOMIC | GFP_DMA);
		if (!priv_info->bouncebuffer) {
			ring->current_slot = old_top_slot;
			ring->used_slots = old_used_slots;
			err = -ENOMEM;
			goto out_unmap_hdr;
		}

		meta->dmaaddr = map_descbuffer(ring, priv_info->bouncebuffer, skb->len, 1);
		if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len, 1)) {
			kfree(priv_info->bouncebuffer);
			priv_info->bouncebuffer = NULL;
			ring->current_slot = old_top_slot;
			ring->used_slots = old_used_slots;
			err = -EIO;
			goto out_unmap_hdr;
		}
	}

	ops->fill_descriptor(ring, desc, meta->dmaaddr, skb->len, 0, 1, 1);

	if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
		b43_shm_write16(ring->dev, B43_SHM_SHARED,
				B43_SHM_SH_MCASTCOOKIE, cookie);
	}
	
	wmb();
	ops->poke_tx(ring, next_slot(ring, slot));
	return 0;

out_unmap_hdr:
	unmap_descbuffer(ring, meta_hdr->dmaaddr,
			 hdrsize, 1);
	return err;
}
コード例 #9
0
int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
{
	struct b43_pio_txqueue *q;
	struct ieee80211_hdr *hdr;
	unsigned int hdrlen, total_len;
	int err = 0;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);

	hdr = (struct ieee80211_hdr *)skb->data;

	if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
		
		q = dev->pio.tx_queue_mcast;
		hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
	} else {
		
		q = select_queue_by_priority(dev, skb_get_queue_mapping(skb));
	}

	hdrlen = b43_txhdr_size(dev);
	total_len = roundup(skb->len + hdrlen, 4);

	if (unlikely(total_len > q->buffer_size)) {
		err = -ENOBUFS;
		b43dbg(dev->wl, "PIO: TX packet longer than queue.\n");
		goto out;
	}
	if (unlikely(q->free_packet_slots == 0)) {
		err = -ENOBUFS;
		b43warn(dev->wl, "PIO: TX packet overflow.\n");
		goto out;
	}
	B43_WARN_ON(q->buffer_used > q->buffer_size);

	if (total_len > (q->buffer_size - q->buffer_used)) {
		
		err = -EBUSY;
		ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb));
		q->stopped = true;
		goto out;
	}

	q->queue_prio = skb_get_queue_mapping(skb);

	err = pio_tx_frame(q, skb);
	if (unlikely(err == -ENOKEY)) {
		dev_kfree_skb_any(skb);
		err = 0;
		goto out;
	}
	if (unlikely(err)) {
		b43err(dev->wl, "PIO transmission failure\n");
		goto out;
	}

	B43_WARN_ON(q->buffer_used > q->buffer_size);
	if (((q->buffer_size - q->buffer_used) < roundup(2 + 2 + 6, 4)) ||
	    (q->free_packet_slots == 0)) {
		
		ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb));
		q->stopped = true;
	}

out:
	return err;
}
コード例 #10
0
ファイル: dma.c プロジェクト: abnarain/mac80211-darkbranch
void b43_dma_handle_txstatus(struct b43_wldev *dev,
			     const struct b43_txstatus *status)
{
	const struct b43_dma_ops *ops;
	struct b43_dmaring *ring;
	struct b43_dmadesc_meta *meta;
	int slot, firstused;
	bool frame_succeed;

	ring = parse_cookie(dev, status->cookie, &slot);
	if (unlikely(!ring))
		return;
	B43_WARN_ON(!ring->tx);

	/* Sanity check: TX packets are processed in-order on one ring.
	 * Check if the slot deduced from the cookie really is the first
	 * used slot. */
	firstused = ring->current_slot - ring->used_slots + 1;
	if (firstused < 0)
		firstused = ring->nr_slots + firstused;
	if (unlikely(slot != firstused)) {
		/* This possibly is a firmware bug and will result in
		 * malfunction, memory leaks and/or stall of DMA functionality. */
		b43dbg(dev->wl, "Out of order TX status report on DMA ring %d. "
		       "Expected %d, but got %d\n",
		       ring->index, firstused, slot);
		return;
	}

	ops = ring->ops;
	while (1) {
		B43_WARN_ON(slot < 0 || slot >= ring->nr_slots);
		/* get meta - ignore returned value */
		ops->idx2desc(ring, slot, &meta);

		if (b43_dma_ptr_is_poisoned(meta->skb)) {
			b43dbg(dev->wl, "Poisoned TX slot %d (first=%d) "
			       "on ring %d\n",
			       slot, firstused, ring->index);
			break;
		}
		if (meta->skb) {
			struct b43_private_tx_info *priv_info =
				b43_get_priv_tx_info(IEEE80211_SKB_CB(meta->skb));

			unmap_descbuffer(ring, meta->dmaaddr, meta->skb->len, 1);
			kfree(priv_info->bouncebuffer);
			priv_info->bouncebuffer = NULL;
		} else {
			unmap_descbuffer(ring, meta->dmaaddr,
					 b43_txhdr_size(dev), 1);
		}

		if (meta->is_last_fragment) {
			struct ieee80211_tx_info *info;

			if (unlikely(!meta->skb)) {
				/* This is a scatter-gather fragment of a frame, so
				 * the skb pointer must not be NULL. */
				b43dbg(dev->wl, "TX status unexpected NULL skb "
				       "at slot %d (first=%d) on ring %d\n",
				       slot, firstused, ring->index);
				break;
			}

			info = IEEE80211_SKB_CB(meta->skb);

			/*
			 * Call back to inform the ieee80211 subsystem about
			 * the status of the transmission.
			 */
			frame_succeed = b43_fill_txstatus_report(dev, info, status);
#ifdef CONFIG_B43_DEBUG
			if (frame_succeed)
				ring->nr_succeed_tx_packets++;
			else
				ring->nr_failed_tx_packets++;
			ring->nr_total_packet_tries += status->frame_count;
#endif /* DEBUG */
			ieee80211_tx_status(dev->wl->hw, meta->skb);

			/* skb will be freed by ieee80211_tx_status().
			 * Poison our pointer. */
			meta->skb = B43_DMA_PTR_POISON;
		} else {
			/* No need to call free_descriptor_buffer here, as
			 * this is only the txhdr, which is not allocated.
			 */
			if (unlikely(meta->skb)) {
				b43dbg(dev->wl, "TX status unexpected non-NULL skb "
				       "at slot %d (first=%d) on ring %d\n",
				       slot, firstused, ring->index);
				break;
			}
		}

		/* Everything unmapped and free'd. So it's not used anymore. */
		ring->used_slots--;

		if (meta->is_last_fragment) {
			/* This is the last scatter-gather
			 * fragment of the frame. We are done. */
			break;
		}
		slot = next_slot(ring, slot);
	}
	if (ring->stopped) {
		B43_WARN_ON(free_slots(ring) < TX_SLOTS_PER_FRAME);
		ieee80211_wake_queue(dev->wl->hw, ring->queue_prio);
		ring->stopped = 0;
		if (b43_debug(dev, B43_DBG_DMAVERBOSE)) {
			b43dbg(dev->wl, "Woke up TX ring %d\n", ring->index);
		}
	}
}