Example #1
0
/* Main cleanup function. */
static void b43_destroy_dmaring(struct b43_dmaring *ring,
				const char *ringname)
{
	if (!ring)
		return;

#ifdef CPTCFG_B43_DEBUG
	{
		/* Print some statistics. */
		u64 failed_packets = ring->nr_failed_tx_packets;
		u64 succeed_packets = ring->nr_succeed_tx_packets;
		u64 nr_packets = failed_packets + succeed_packets;
		u64 permille_failed = 0, average_tries = 0;

		if (nr_packets)
			permille_failed = divide(failed_packets * 1000, nr_packets);
		if (nr_packets)
			average_tries = divide(ring->nr_total_packet_tries * 100, nr_packets);

		b43dbg(ring->dev->wl, "DMA-%u %s: "
		       "Used slots %d/%d, Failed frames %llu/%llu = %llu.%01llu%%, "
		       "Average tries %llu.%02llu\n",
		       (unsigned int)(ring->type), ringname,
		       ring->max_used_slots,
		       ring->nr_slots,
		       (unsigned long long)failed_packets,
		       (unsigned long long)nr_packets,
		       (unsigned long long)divide(permille_failed, 10),
		       (unsigned long long)modulo(permille_failed, 10),
		       (unsigned long long)divide(average_tries, 100),
		       (unsigned long long)modulo(average_tries, 100));
	}
#endif /* DEBUG */

	/* 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);
}
Example #2
0
static void b43_destroy_dmaring(struct b43_dmaring *ring,
				const char *ringname)
{
	if (!ring)
		return;

#ifdef CONFIG_B43_DEBUG
	{
		
		u64 failed_packets = ring->nr_failed_tx_packets;
		u64 succeed_packets = ring->nr_succeed_tx_packets;
		u64 nr_packets = failed_packets + succeed_packets;
		u64 permille_failed = 0, average_tries = 0;

		if (nr_packets)
			permille_failed = divide(failed_packets * 1000, nr_packets);
		if (nr_packets)
			average_tries = divide(ring->nr_total_packet_tries * 100, nr_packets);

		b43dbg(ring->dev->wl, "DMA-%u %s: "
		       "Used slots %d/%d, Failed frames %llu/%llu = %llu.%01llu%%, "
		       "Average tries %llu.%02llu\n",
		       (unsigned int)(ring->type), ringname,
		       ring->max_used_slots,
		       ring->nr_slots,
		       (unsigned long long)failed_packets,
		       (unsigned long long)nr_packets,
		       (unsigned long long)divide(permille_failed, 10),
		       (unsigned long long)modulo(permille_failed, 10),
		       (unsigned long long)divide(average_tries, 100),
		       (unsigned long long)modulo(average_tries, 100));
	}
#endif 

	dmacontroller_cleanup(ring);
	free_all_descbuffers(ring);
	free_ringmemory(ring);

	kfree(ring->txhdr_cache);
	kfree(ring->meta);
	kfree(ring);
}
Example #3
0
/* 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;
}