diff options
| -rw-r--r-- | package/mac80211/patches/550-ath9k_optimize_memory_allocation.patch | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/package/mac80211/patches/550-ath9k_optimize_memory_allocation.patch b/package/mac80211/patches/550-ath9k_optimize_memory_allocation.patch new file mode 100644 index 0000000000..8d3d62a83f --- /dev/null +++ b/package/mac80211/patches/550-ath9k_optimize_memory_allocation.patch @@ -0,0 +1,200 @@ +--- a/drivers/net/wireless/ath/ath9k/main.c ++++ b/drivers/net/wireless/ath/ath9k/main.c +@@ -1291,6 +1291,11 @@ static void ath9k_stop(struct ieee80211_ + } else + sc->rx.rxlink = NULL; + ++ if (sc->rx.frag) { ++ dev_kfree_skb_any(sc->rx.frag); ++ sc->rx.frag = NULL; ++ } ++ + /* disable HAL and put h/w to sleep */ + ath9k_hw_disable(ah); + ath9k_hw_configpcipowersave(ah, 1, 1); +--- a/drivers/net/wireless/ath/ath9k/recv.c ++++ b/drivers/net/wireless/ath/ath9k/recv.c +@@ -209,11 +209,6 @@ static int ath_rx_edma_init(struct ath_s + int error = 0, i; + u32 size; + +- +- common->rx_bufsize = roundup(IEEE80211_MAX_MPDU_LEN + +- ah->caps.rx_status_len, +- min(common->cachelsz, (u16)64)); +- + ath9k_hw_set_rx_bufsize(ah, common->rx_bufsize - + ah->caps.rx_status_len); + +@@ -300,12 +295,12 @@ int ath_rx_init(struct ath_softc *sc, in + sc->sc_flags &= ~SC_OP_RXFLUSH; + spin_lock_init(&sc->rx.rxbuflock); + ++ common->rx_bufsize = IEEE80211_MAX_MPDU_LEN / 2 + common->cachelsz + ++ sc->sc_ah->caps.rx_status_len; ++ + if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { + return ath_rx_edma_init(sc, nbufs); + } else { +- common->rx_bufsize = roundup(IEEE80211_MAX_MPDU_LEN, +- min(common->cachelsz, (u16)64)); +- + ath_dbg(common, ATH_DBG_CONFIG, "cachelsz %u rxbufsize %u\n", + common->cachelsz, common->rx_bufsize); + +@@ -815,15 +810,9 @@ static bool ath9k_rx_accept(struct ath_c + if (rx_stats->rs_datalen > (common->rx_bufsize - rx_status_len)) + return false; + +- /* +- * rs_more indicates chained descriptors which can be used +- * to link buffers together for a sort of scatter-gather +- * operation. +- * reject the frame, we don't support scatter-gather yet and +- * the frame is probably corrupt anyway +- */ ++ /* Only use error bits from the last fragment */ + if (rx_stats->rs_more) +- return false; ++ return true; + + /* + * The rx_stats->rs_status will not be set until the end of the +@@ -981,6 +970,10 @@ static int ath9k_rx_skb_preprocess(struc + if (!ath9k_rx_accept(common, hdr, rx_status, rx_stats, decrypt_error)) + return -EINVAL; + ++ /* Only use status info from the last fragment */ ++ if (rx_stats->rs_more) ++ return 0; ++ + ath9k_process_rssi(common, hw, hdr, rx_stats); + + if (ath9k_process_rate(common, hw, rx_stats, rx_status)) +@@ -1582,7 +1575,7 @@ div_comb_done: + int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp) + { + struct ath_buf *bf; +- struct sk_buff *skb = NULL, *requeue_skb; ++ struct sk_buff *skb = NULL, *requeue_skb, *hdr_skb; + struct ieee80211_rx_status *rxs; + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); +@@ -1633,8 +1626,17 @@ int ath_rx_tasklet(struct ath_softc *sc, + if (!skb) + continue; + +- hdr = (struct ieee80211_hdr *) (skb->data + rx_status_len); +- rxs = IEEE80211_SKB_RXCB(skb); ++ /* ++ * Take frame header from the first fragment and RX status from ++ * the last one. ++ */ ++ if (sc->rx.frag) ++ hdr_skb = sc->rx.frag; ++ else ++ hdr_skb = skb; ++ ++ hdr = (struct ieee80211_hdr *) (hdr_skb->data + rx_status_len); ++ rxs = IEEE80211_SKB_RXCB(hdr_skb); + + ath_debug_stat_rx(sc, &rs); + +@@ -1643,12 +1645,12 @@ int ath_rx_tasklet(struct ath_softc *sc, + * chain it back at the queue without processing it. + */ + if (flush) +- goto requeue; ++ goto requeue_drop_frag; + + retval = ath9k_rx_skb_preprocess(common, hw, hdr, &rs, + rxs, &decrypt_error); + if (retval) +- goto requeue; ++ goto requeue_drop_frag; + + rxs->mactime = (tsf & ~0xffffffffULL) | rs.rs_tstamp; + if (rs.rs_tstamp > tsf_lower && +@@ -1668,7 +1670,7 @@ int ath_rx_tasklet(struct ath_softc *sc, + * skb and put it at the tail of the sc->rx.rxbuf list for + * processing. */ + if (!requeue_skb) +- goto requeue; ++ goto requeue_drop_frag; + + /* Unmap the frame */ + dma_unmap_single(sc->dev, bf->bf_buf_addr, +@@ -1679,8 +1681,9 @@ int ath_rx_tasklet(struct ath_softc *sc, + if (ah->caps.rx_status_len) + skb_pull(skb, ah->caps.rx_status_len); + +- ath9k_rx_skb_postprocess(common, skb, &rs, +- rxs, decrypt_error); ++ if (!rs.rs_more) ++ ath9k_rx_skb_postprocess(common, hdr_skb, &rs, ++ rxs, decrypt_error); + + /* We will now give hardware our shiny new allocated skb */ + bf->bf_mpdu = requeue_skb; +@@ -1697,6 +1700,38 @@ int ath_rx_tasklet(struct ath_softc *sc, + break; + } + ++ if (rs.rs_more) { ++ /* ++ * rs_more indicates chained descriptors which can be ++ * used to link buffers together for a sort of ++ * scatter-gather operation. ++ */ ++ if (sc->rx.frag) { ++ /* too many fragments - cannot handle frame */ ++ dev_kfree_skb_any(sc->rx.frag); ++ dev_kfree_skb_any(skb); ++ skb = NULL; ++ } ++ sc->rx.frag = skb; ++ goto requeue; ++ } ++ ++ if (sc->rx.frag) { ++ int space = skb->len - skb_tailroom(hdr_skb); ++ ++ sc->rx.frag = NULL; ++ ++ if (pskb_expand_head(hdr_skb, 0, space, GFP_ATOMIC) < 0) { ++ dev_kfree_skb(skb); ++ goto requeue_drop_frag; ++ } ++ ++ skb_copy_from_linear_data(skb, skb_put(hdr_skb, skb->len), ++ skb->len); ++ dev_kfree_skb_any(skb); ++ skb = hdr_skb; ++ } ++ + /* + * change the default rx antenna if rx diversity chooses the + * other antenna 3 times in a row. +@@ -1722,6 +1757,11 @@ int ath_rx_tasklet(struct ath_softc *sc, + + ieee80211_rx(hw, skb); + ++requeue_drop_frag: ++ if (sc->rx.frag) { ++ dev_kfree_skb_any(sc->rx.frag); ++ sc->rx.frag = NULL; ++ } + requeue: + if (edma) { + list_add_tail(&bf->list, &sc->rx.rxbuf); +--- a/drivers/net/wireless/ath/ath9k/ath9k.h ++++ b/drivers/net/wireless/ath/ath9k/ath9k.h +@@ -311,6 +311,8 @@ struct ath_rx { + struct ath_descdma rxdma; + struct ath_buf *rx_bufptr; + struct ath_rx_edma rx_edma[ATH9K_RX_QUEUE_MAX]; ++ ++ struct sk_buff *frag; + }; + + int ath_startrecv(struct ath_softc *sc); |