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mac80211: backport RX timestamp flags patch 

Backport RX timestamp flags patch needed for ath10k-ct to compile with
newer versions.

Link: https://github.com/openwrt/openwrt/pull/15735
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
This commit is contained in:
Christian Marangi 2024-06-17 18:56:53 +02:00
parent 3b2a81ec24
commit 0134270319
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1 changed files with 161 additions and 0 deletions
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161
package/kernel/mac80211/patches/subsys/100-v6.8-wifi-mac80211-rework-RX-timestamp-flags.patch Normal file
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@ -0,0 +1,161 @@
From d5b6f6d595b446c1693fdaa6aeb4a65b94d5fc90 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Wed, 20 Dec 2023 13:41:39 +0200
Subject: [PATCH] wifi: mac80211: rework RX timestamp flags
We only have a single flag free, and before using that for
another mactime flag, instead refactor the mactime flags
to use a 2-bit field.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Reviewed-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20231220133549.d0e664832d14.I20c8900106f9bf81316bed778b1e3ce145785274@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
drivers/net/wireless/ath/ath10k/htt_rx.c | 2 +-
include/net/mac80211.h | 13 +++++++++----
net/mac80211/ieee80211_i.h | 5 +----
net/mac80211/util.c | 16 ++++++++++------
4 files changed, 21 insertions(+), 15 deletions(-)
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -1294,7 +1294,7 @@ static void ath10k_htt_rx_h_ppdu(struct
status->encoding = RX_ENC_LEGACY;
status->bw = RATE_INFO_BW_20;
- status->flag &= ~RX_FLAG_MACTIME_END;
+ status->flag &= ~RX_FLAG_MACTIME;
status->flag |= RX_FLAG_NO_SIGNAL_VAL;
status->flag &= ~(RX_FLAG_AMPDU_IS_LAST);
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1352,6 +1352,9 @@ ieee80211_tx_info_clear_status(struct ie
* the frame.
* @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on
* the frame.
+ * @RX_FLAG_MACTIME: The timestamp passed in the RX status (@mactime
+ * field) is valid if this field is non-zero, and the position
+ * where the timestamp was sampled depends on the value.
* @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime
* field) is valid and contains the time the first symbol of the MPDU
* was received. This is useful in monitor mode and for proper IBSS
@@ -1431,12 +1434,12 @@ ieee80211_tx_info_clear_status(struct ie
enum mac80211_rx_flags {
RX_FLAG_MMIC_ERROR = BIT(0),
RX_FLAG_DECRYPTED = BIT(1),
- RX_FLAG_MACTIME_PLCP_START = BIT(2),
+ RX_FLAG_ONLY_MONITOR = BIT(2),
RX_FLAG_MMIC_STRIPPED = BIT(3),
RX_FLAG_IV_STRIPPED = BIT(4),
RX_FLAG_FAILED_FCS_CRC = BIT(5),
RX_FLAG_FAILED_PLCP_CRC = BIT(6),
- RX_FLAG_MACTIME_START = BIT(7),
+ /* one free bit at 7 */
RX_FLAG_NO_SIGNAL_VAL = BIT(8),
RX_FLAG_AMPDU_DETAILS = BIT(9),
RX_FLAG_PN_VALIDATED = BIT(10),
@@ -1445,8 +1448,10 @@ enum mac80211_rx_flags {
RX_FLAG_AMPDU_IS_LAST = BIT(13),
RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(14),
RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(15),
- RX_FLAG_MACTIME_END = BIT(16),
- RX_FLAG_ONLY_MONITOR = BIT(17),
+ RX_FLAG_MACTIME = BIT(16) | BIT(17),
+ RX_FLAG_MACTIME_PLCP_START = 1 << 16,
+ RX_FLAG_MACTIME_START = 2 << 16,
+ RX_FLAG_MACTIME_END = 3 << 16,
RX_FLAG_SKIP_MONITOR = BIT(18),
RX_FLAG_AMSDU_MORE = BIT(19),
RX_FLAG_RADIOTAP_TLV_AT_END = BIT(20),
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1807,10 +1807,7 @@ static inline bool txq_has_queue(struct
static inline bool
ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
{
- WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
- status->flag & RX_FLAG_MACTIME_END);
- return !!(status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END |
- RX_FLAG_MACTIME_PLCP_START));
+ return status->flag & RX_FLAG_MACTIME;
}
void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata);
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -4174,6 +4174,7 @@ u64 ieee80211_calculate_rx_timestamp(str
unsigned int mpdu_offset)
{
u64 ts = status->mactime;
+ bool mactime_plcp_start;
struct rate_info ri;
u16 rate;
u8 n_ltf;
@@ -4181,6 +4182,9 @@ u64 ieee80211_calculate_rx_timestamp(str
if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
return 0;
+ mactime_plcp_start = (status->flag & RX_FLAG_MACTIME) ==
+ RX_FLAG_MACTIME_PLCP_START;
+
memset(&ri, 0, sizeof(ri));
ri.bw = status->bw;
@@ -4195,7 +4199,7 @@ u64 ieee80211_calculate_rx_timestamp(str
if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
/* TODO/FIXME: is this right? handle other PPDUs */
- if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
+ if (mactime_plcp_start) {
mpdu_offset += 2;
ts += 36;
}
@@ -4212,7 +4216,7 @@ u64 ieee80211_calculate_rx_timestamp(str
* See P802.11ax_D6.0, section 27.3.4 for
* VHT PPDU format.
*/
- if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
+ if (mactime_plcp_start) {
mpdu_offset += 2;
ts += 36;
@@ -4236,7 +4240,7 @@ u64 ieee80211_calculate_rx_timestamp(str
* See P802.11REVmd_D3.0, section 19.3.2 for
* HT PPDU format.
*/
- if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
+ if (mactime_plcp_start) {
mpdu_offset += 2;
if (status->enc_flags & RX_ENC_FLAG_HT_GF)
ts += 24;
@@ -4264,7 +4268,7 @@ u64 ieee80211_calculate_rx_timestamp(str
* See P802.11REVmd_D3.0, section 21.3.2 for
* VHT PPDU format.
*/
- if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
+ if (mactime_plcp_start) {
mpdu_offset += 2;
ts += 36;
@@ -4298,7 +4302,7 @@ u64 ieee80211_calculate_rx_timestamp(str
bitrate = sband->bitrates[status->rate_idx].bitrate;
ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
- if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
+ if (mactime_plcp_start) {
if (status->band == NL80211_BAND_5GHZ) {
ts += 20 << shift;
mpdu_offset += 2;
@@ -4320,7 +4324,7 @@ u64 ieee80211_calculate_rx_timestamp(str
return 0;
/* rewind from end of MPDU */
- if (status->flag & RX_FLAG_MACTIME_END)
+ if ((status->flag & RX_FLAG_MACTIME) == RX_FLAG_MACTIME_END)
ts -= mpdu_len * 8 * 10 / rate;
ts += mpdu_offset * 8 * 10 / rate;