diff options
| author | Shayne Chen <shayne.chen@mediatek.com> | 2022-07-11 17:19:10 +0300 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2022-09-15 14:12:23 +0300 |
| commit | 94eb0bc1374def63290b33b406480d64e31fbcaf (patch) | |
| tree | 3801f628d623ac7bf9797587b2419bb7ca6592a0 | |
| parent | d70546462b7b51ebc2bcdd5c534fdf3465be62a4 (diff) | |
wifi: mt76: testmode: use random payload for tx packets
Compared to fixed payload packets, random payload packets have better
measured EVM under the same txpower. Our tests show EVM becomes at least
2-3 dB better in test cases with high rate and long tx length, which also
aligns the testing results to proprietary driver.
Suggested-by: Jm Chen <jm.chen@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
| -rw-r--r-- | testmode.c | 8 |
1 files changed, 6 insertions, 2 deletions
@@ -1,5 +1,7 @@ // SPDX-License-Identifier: ISC /* Copyright (C) 2020 Felix Fietkau <nbd@nbd.name> */ + +#include <linux/random.h> #include "mt76.h" const struct nla_policy mt76_tm_policy[NUM_MT76_TM_ATTRS] = { @@ -123,12 +125,14 @@ int mt76_testmode_alloc_skb(struct mt76_phy *phy, u32 len) if (!head) return -ENOMEM; - hdr = __skb_put_zero(head, head_len); + hdr = __skb_put_zero(head, sizeof(*hdr)); hdr->frame_control = cpu_to_le16(fc); memcpy(hdr->addr1, td->addr[0], ETH_ALEN); memcpy(hdr->addr2, td->addr[1], ETH_ALEN); memcpy(hdr->addr3, td->addr[2], ETH_ALEN); skb_set_queue_mapping(head, IEEE80211_AC_BE); + get_random_bytes(__skb_put(head, head_len - sizeof(*hdr)), + head_len - sizeof(*hdr)); info = IEEE80211_SKB_CB(head); info->flags = IEEE80211_TX_CTL_INJECTED | @@ -154,7 +158,7 @@ int mt76_testmode_alloc_skb(struct mt76_phy *phy, u32 len) return -ENOMEM; } - __skb_put_zero(frag, frag_len); + get_random_bytes(__skb_put(frag, frag_len), frag_len); head->len += frag->len; head->data_len += frag->len; |