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; }