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;
}
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;
}
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;
}
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;
}