diff options
Diffstat (limited to 'package/kernel/mac80211/patches/subsys/358-mac80211-add-NEED_ALIGNED4_SKBS-hw-flag.patch')
-rw-r--r-- | package/kernel/mac80211/patches/subsys/358-mac80211-add-NEED_ALIGNED4_SKBS-hw-flag.patch | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/package/kernel/mac80211/patches/subsys/358-mac80211-add-NEED_ALIGNED4_SKBS-hw-flag.patch b/package/kernel/mac80211/patches/subsys/358-mac80211-add-NEED_ALIGNED4_SKBS-hw-flag.patch deleted file mode 100644 index f4048b0420..0000000000 --- a/package/kernel/mac80211/patches/subsys/358-mac80211-add-NEED_ALIGNED4_SKBS-hw-flag.patch +++ /dev/null @@ -1,233 +0,0 @@ -From: Janusz Dziedzic <janusz.dziedzic@tieto.com> -Date: Fri, 19 Feb 2016 11:01:50 +0100 -Subject: [PATCH] mac80211: add NEED_ALIGNED4_SKBS hw flag - -HW/driver should set NEED_ALIGNED4_SKBS flag in case -require aligned skbs to four-byte boundaries. -This affect only TX direction. - -Padding is added after ieee80211_hdr, before IV/LLC. - -Before we have to do memmove(hdrlen) twice in the -dirver. Once before we pass this to HW and next -in tx completion (to be sure monitor will report -this tx frame correctly). - -With this patch we can skip this memmove() and save CPU. - -Currently this was tested with ath9k, both hw/sw crypt for -wep/tkip/ccmp. - -Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com> ---- - ---- a/include/net/mac80211.h -+++ b/include/net/mac80211.h -@@ -2131,6 +2131,9 @@ struct ieee80211_txq { - * @IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP: The driver (or firmware) doesn't - * support QoS NDP for AP probing - that's most likely a driver bug. - * -+ * @IEEE80211_HW_NEEDS_ALIGNED4_SKBS: Driver need aligned skbs to four-byte. -+ * Padding will be added after ieee80211_hdr, before IV/LLC. -+ * - * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays - */ - enum ieee80211_hw_flags { -@@ -2176,6 +2179,7 @@ enum ieee80211_hw_flags { - IEEE80211_HW_SUPPORTS_TDLS_BUFFER_STA, - IEEE80211_HW_DEAUTH_NEED_MGD_TX_PREP, - IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP, -+ IEEE80211_HW_NEEDS_ALIGNED4_SKBS, - - /* keep last, obviously */ - NUM_IEEE80211_HW_FLAGS ---- a/net/mac80211/debugfs.c -+++ b/net/mac80211/debugfs.c -@@ -214,6 +214,7 @@ static const char *hw_flag_names[] = { - FLAG(SUPPORTS_TDLS_BUFFER_STA), - FLAG(DEAUTH_NEED_MGD_TX_PREP), - FLAG(DOESNT_SUPPORT_QOS_NDP), -+ FLAG(NEEDS_ALIGNED4_SKBS), - #undef FLAG - }; - ---- a/net/mac80211/ieee80211_i.h -+++ b/net/mac80211/ieee80211_i.h -@@ -1559,6 +1559,29 @@ ieee80211_vif_get_num_mcast_if(struct ie - return -1; - } - -+static inline unsigned int -+ieee80211_hdr_padsize(struct ieee80211_hw *hw, unsigned int hdrlen) -+{ -+ /* -+ * While hdrlen is already aligned to two-byte boundaries, -+ * simple check with & 2 will return correct padsize. -+ */ -+ if (ieee80211_hw_check(hw, NEEDS_ALIGNED4_SKBS)) -+ return hdrlen & 2; -+ return 0; -+} -+ -+static inline unsigned int -+ieee80211_padded_hdrlen(struct ieee80211_hw *hw, __le16 fc) -+{ -+ unsigned int hdrlen; -+ -+ hdrlen = ieee80211_hdrlen(fc); -+ hdrlen += ieee80211_hdr_padsize(hw, hdrlen); -+ -+ return hdrlen; -+} -+ - u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, - struct ieee80211_rx_status *status, - unsigned int mpdu_len, ---- a/net/mac80211/sta_info.h -+++ b/net/mac80211/sta_info.h -@@ -301,7 +301,7 @@ struct ieee80211_fast_tx { - u8 hdr_len; - u8 sa_offs, da_offs, pn_offs; - u8 band; -- u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + -+ u8 hdr[30 + 2 + 2 + IEEE80211_FAST_XMIT_MAX_IV + - sizeof(rfc1042_header)] __aligned(2); - - struct rcu_head rcu_head; ---- a/net/mac80211/status.c -+++ b/net/mac80211/status.c -@@ -655,9 +655,22 @@ void ieee80211_tx_monitor(struct ieee802 - struct sk_buff *skb2; - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - struct ieee80211_sub_if_data *sdata; -+ struct ieee80211_hdr *hdr = (void *)skb->data; - struct net_device *prev_dev = NULL; -+ unsigned int hdrlen, padsize; - int rtap_len; - -+ /* Remove padding if was added */ -+ if (ieee80211_hw_check(&local->hw, NEEDS_ALIGNED4_SKBS)) { -+ hdrlen = ieee80211_hdrlen(hdr->frame_control); -+ padsize = ieee80211_hdr_padsize(&local->hw, hdrlen); -+ -+ if (padsize && skb->len > hdrlen + padsize) { -+ memmove(skb->data + padsize, skb->data, hdrlen); -+ skb_pull(skb, padsize); -+ } -+ } -+ - /* send frame to monitor interfaces now */ - rtap_len = ieee80211_tx_radiotap_len(info); - if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { ---- a/net/mac80211/tkip.c -+++ b/net/mac80211/tkip.c -@@ -201,10 +201,12 @@ void ieee80211_get_tkip_p2k(struct ieee8 - { - struct ieee80211_key *key = (struct ieee80211_key *) - container_of(keyconf, struct ieee80211_key, conf); -+ struct ieee80211_hw *hw = &key->local->hw; - const u8 *tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY]; - struct tkip_ctx *ctx = &key->u.tkip.tx; - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; -- const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); -+ const u8 *data = (u8 *)hdr + ieee80211_padded_hdrlen(hw, -+ hdr->frame_control); - u32 iv32 = get_unaligned_le32(&data[4]); - u16 iv16 = data[2] | (data[0] << 8); - ---- a/net/mac80211/tx.c -+++ b/net/mac80211/tx.c -@@ -1175,8 +1175,7 @@ ieee80211_tx_prepare(struct ieee80211_su - info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; - - hdr = (struct ieee80211_hdr *) skb->data; -- -- tx->hdrlen = ieee80211_hdrlen(hdr->frame_control); -+ tx->hdrlen = ieee80211_padded_hdrlen(&local->hw, hdr->frame_control); - - if (likely(sta)) { - if (!IS_ERR(sta)) -@@ -2215,7 +2214,7 @@ netdev_tx_t ieee80211_monitor_start_xmit - goto fail; - - hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); -- hdrlen = ieee80211_hdrlen(hdr->frame_control); -+ hdrlen = ieee80211_padded_hdrlen(&local->hw, hdr->frame_control); - - if (skb->len < len_rthdr + hdrlen) - goto fail; -@@ -2433,7 +2432,7 @@ static struct sk_buff *ieee80211_build_h - struct ieee80211_chanctx_conf *chanctx_conf; - struct ieee80211_sub_if_data *ap_sdata; - enum nl80211_band band; -- int ret; -+ int padsize, ret; - - if (IS_ERR(sta)) - sta = NULL; -@@ -2653,6 +2652,9 @@ static struct sk_buff *ieee80211_build_h - hdrlen += 2; - } - -+ /* Check aligned4 skb required */ -+ padsize = ieee80211_hdr_padsize(&sdata->local->hw, hdrlen); -+ - /* - * Drop unicast frames to unauthorised stations unless they are - * EAPOL frames from the local station. -@@ -2733,6 +2735,7 @@ static struct sk_buff *ieee80211_build_h - - skb_pull(skb, skip_header_bytes); - head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); -+ head_need += padsize; - - /* - * So we need to modify the skb header and hence need a copy of -@@ -2765,6 +2768,9 @@ static struct sk_buff *ieee80211_build_h - memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); - #endif - -+ if (padsize) -+ memset(skb_push(skb, padsize), 0, padsize); -+ - if (ieee80211_is_data_qos(fc)) { - __le16 *qos_control; - -@@ -2940,6 +2946,9 @@ void ieee80211_check_fast_xmit(struct st - fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); - } - -+ /* Check aligned4 skb required */ -+ build.hdr_len += ieee80211_hdr_padsize(&local->hw, build.hdr_len); -+ - /* We store the key here so there's no point in using rcu_dereference() - * but that's fine because the code that changes the pointers will call - * this function after doing so. For a single CPU that would be enough, -@@ -3540,7 +3549,7 @@ begin: - - if (tx.key && - (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) -- pn_offs = ieee80211_hdrlen(hdr->frame_control); -+ pn_offs = tx.hdrlen; - - ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs, - tx.key, skb); ---- a/net/mac80211/util.c -+++ b/net/mac80211/util.c -@@ -1388,6 +1388,7 @@ void ieee80211_send_auth(struct ieee8021 - u32 tx_flags) - { - struct ieee80211_local *local = sdata->local; -+ struct ieee80211_hw *hw = &local->hw; - struct sk_buff *skb; - struct ieee80211_mgmt *mgmt; - unsigned int hdrlen; -@@ -1414,7 +1415,7 @@ void ieee80211_send_auth(struct ieee8021 - skb_put_data(skb, extra, extra_len); - - if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { -- hdrlen = ieee80211_hdrlen(mgmt->frame_control); -+ hdrlen = ieee80211_padded_hdrlen(hw, mgmt->frame_control); - mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); - err = ieee80211_wep_encrypt(local, skb, hdrlen, key, - key_len, key_idx); |