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-rw-r--r--package/mac80211/patches/550-ath9k_optimize_memory_allocation.patch200
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);
generated by cgit v1.2.3 (git 2.46.0) at 2024-12-26 04:09:56 +0000