===================================================================
@@ -1157,18 +1157,17 @@ struct b43_dmaring *parse_cookie(struct
}
static int dma_tx_fragment(struct b43_dmaring *ring,
- struct sk_buff **in_skb)
+ struct sk_buff *skb)
{
- struct sk_buff *skb = *in_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;
- struct sk_buff *bounce_skb;
u16 cookie;
size_t hdrsize = b43_txhdr_size(ring->dev);
@@ -1212,34 +1211,34 @@ static int dma_tx_fragment(struct b43_dm
meta->skb = skb;
meta->is_last_fragment = 1;
+ 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)) {
- bounce_skb = __dev_alloc_skb(skb->len, GFP_ATOMIC | GFP_DMA);
- if (!bounce_skb) {
+
+{
+static unsigned int count;
+if (count++ < 10)
+ printk(KERN_DEBUG "Allocated bounce buffer\n");
+}
+ priv_info->bouncebuffer = kmalloc(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;
}
+ memcpy(priv_info->bouncebuffer, skb->data, skb->len);
- memcpy(skb_put(bounce_skb, skb->len), skb->data, skb->len);
- memcpy(bounce_skb->cb, skb->cb, sizeof(skb->cb));
- bounce_skb->dev = skb->dev;
- skb_set_queue_mapping(bounce_skb, skb_get_queue_mapping(skb));
- info = IEEE80211_SKB_CB(bounce_skb);
-
- dev_kfree_skb_any(skb);
- skb = bounce_skb;
- *in_skb = bounce_skb;
- meta->skb = skb;
- meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1);
+ 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_free_bounce;
+ goto out_unmap_hdr;
}
}
@@ -1256,8 +1255,6 @@ static int dma_tx_fragment(struct b43_dm
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,
hdrsize, 1);
@@ -1362,11 +1359,7 @@ int b43_dma_tx(struct b43_wldev *dev, st
* static, so we don't need to store it per frame. */
ring->queue_prio = skb_get_queue_mapping(skb);
- /* dma_tx_fragment might reallocate the skb, so invalidate pointers pointing
- * into the skb data or cb now. */
- hdr = NULL;
- info = NULL;
- err = dma_tx_fragment(ring, &skb);
+ err = dma_tx_fragment(ring, skb);
if (unlikely(err == -ENOKEY)) {
/* Drop this packet, as we don't have the encryption key
* anymore and must not transmit it unencrypted. */
@@ -1413,12 +1406,17 @@ void b43_dma_handle_txstatus(struct b43_
B43_WARN_ON(!(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
+ 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;
===================================================================
@@ -2,6 +2,8 @@
#define B43_XMIT_H_
#include "main.h"
+#include <net/mac80211.h>
+
#define _b43_declare_plcp_hdr(size) \
struct b43_plcp_hdr##size { \
@@ -332,4 +334,21 @@ static inline u8 b43_kidx_to_raw(struct
return raw_kidx;
}
+/* struct b43_private_tx_info - TX info private to b43.
+ * The structure is placed in (struct ieee80211_tx_info *)->rate_driver_data
+ *
+ * @bouncebuffer: DMA Bouncebuffer (if used)
+ */
+struct b43_private_tx_info {
+ void *bouncebuffer;
+};
+
+static inline struct b43_private_tx_info *
+b43_get_priv_tx_info(struct ieee80211_tx_info *info)
+{
+ BUILD_BUG_ON(sizeof(struct b43_private_tx_info) >
+ sizeof(info->rate_driver_data));
+ return (struct b43_private_tx_info *)info->rate_driver_data;
+}
+
#endif /* B43_XMIT_H_ */