|
 |
82b878e |
4965 version of Eric patch "iwl3945: better skb management in rx path".
|
|
|
82b878e |
It fixes several problems :
|
|
|
82b878e |
|
|
|
82b878e |
1) skb->truesize is underestimated.
|
|
|
82b878e |
We really consume PAGE_SIZE bytes for a fragment,
|
|
|
82b878e |
not the frame length.
|
|
|
82b878e |
2) 128 bytes of initial headroom is a bit low and forces reallocations.
|
|
|
82b878e |
3) We can avoid consuming a full page for small enough frames.
|
|
|
82b878e |
|
|
|
82b878e |
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
|
|
|
82b878e |
---
|
|
|
82b878e |
drivers/net/wireless/iwlegacy/4965-mac.c | 18 ++++++++++++------
|
|
|
82b878e |
1 file changed, 12 insertions(+), 6 deletions(-)
|
|
|
82b878e |
|
|
|
82b878e |
diff --git a/drivers/net/wireless/iwlegacy/4965-mac.c b/drivers/net/wireless/iwlegacy/4965-mac.c
|
|
|
82b878e |
index d287fd2..4e5d408 100644
|
|
|
82b878e |
--- a/drivers/net/wireless/iwlegacy/4965-mac.c
|
|
|
82b878e |
+++ b/drivers/net/wireless/iwlegacy/4965-mac.c
|
|
|
82b878e |
@@ -574,9 +574,11 @@ il4965_translate_rx_status(struct il_priv *il, u32 decrypt_in)
|
|
|
82b878e |
return decrypt_out;
|
|
|
82b878e |
}
|
|
|
82b878e |
|
|
|
82b878e |
+#define SMALL_PACKET_SIZE 256
|
|
|
82b878e |
+
|
|
|
82b878e |
static void
|
|
|
82b878e |
il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr,
|
|
|
82b878e |
- u16 len, u32 ampdu_status, struct il_rx_buf *rxb,
|
|
|
82b878e |
+ u32 len, u32 ampdu_status, struct il_rx_buf *rxb,
|
|
|
82b878e |
struct ieee80211_rx_status *stats)
|
|
|
82b878e |
{
|
|
|
82b878e |
struct sk_buff *skb;
|
|
|
82b878e |
@@ -598,21 +600,25 @@ il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr,
|
|
|
82b878e |
il_set_decrypted_flag(il, hdr, ampdu_status, stats))
|
|
|
82b878e |
return;
|
|
|
82b878e |
|
|
|
82b878e |
- skb = dev_alloc_skb(128);
|
|
|
82b878e |
+ skb = dev_alloc_skb(SMALL_PACKET_SIZE);
|
|
|
82b878e |
if (!skb) {
|
|
|
82b878e |
IL_ERR("dev_alloc_skb failed\n");
|
|
|
82b878e |
return;
|
|
|
82b878e |
}
|
|
|
82b878e |
|
|
|
82b878e |
- skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len,
|
|
|
82b878e |
- len);
|
|
|
82b878e |
+ if (len <= SMALL_PACKET_SIZE) {
|
|
|
82b878e |
+ memcpy(skb_put(skb, len), hdr, len);
|
|
|
82b878e |
+ } else {
|
|
|
82b878e |
+ skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb),
|
|
|
82b878e |
+ len, PAGE_SIZE << il->hw_params.rx_page_order);
|
|
|
82b878e |
+ il->alloc_rxb_page--;
|
|
|
82b878e |
+ rxb->page = NULL;
|
|
|
82b878e |
+ }
|
|
|
82b878e |
|
|
|
82b878e |
il_update_stats(il, false, fc, len);
|
|
|
82b878e |
memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
|
|
|
82b878e |
|
|
|
82b878e |
ieee80211_rx(il->hw, skb);
|
|
|
82b878e |
- il->alloc_rxb_page--;
|
|
|
82b878e |
- rxb->page = NULL;
|
|
|
82b878e |
}
|
|
|
82b878e |
|
|
|
82b878e |
/* Called for N_RX (legacy ABG frames), or
|
|
|
82b878e |
--
|
|
|
82b878e |
1.7.11.7
|
|
|
82b878e |
|
|
|
82b878e |
|