[v3,00/12] wifi: cfg80211/mac80211: add support to handle per link statistics of multi-link station

Current implementation of NL80211_CMD_GET_STATION does not work
for multi-link operation(MLO) since in case of MLO only deflink
(or one of the links) is considered and not all links.

Hence, add the link_sinfo structure to provide infrastructure
for link-level station statistics for multi-link operation(MLO).

Additionally, accumulated stats for MLO are included in a concise
manner to provide a comprehensive overview of the ML stations.

V3:
 - Convert RFC patch to actual PATCH with each patch bisectable.
 - Add logic for MLO level signal and rates.

V2:
 - Update cover letter to give more details on structural changes.
 - Split the patch(1/7) in two patches.
 - Do the required changes for MLO bringup before as seperate patches.
 - Remove link_sinfo naming to sinfo for better clarity on changes.
 - Add accumulated stats logic in cfg80211.
 - Add flag to indicate driver supports per-link station statistics or not.

Current flow:
  cfg80211:
  - Structure station_info is used to fill all station information (station
    level as well link level).
  - Nl80211_get_station() - locally define sinfo, call -.get_station() ops

  mac80211:
  - Sta_set_sinfo() - fill station information and call mac80211
    ops - .sta_statistics()(to fill the station_info structure).

Purposed flow:
 cfg80211:
  - Structure changes for station_info
    structure station_info {
      filled
      packets
      sta_flags
      ... etc // station specific fields
      link_station_info *links[IEEE80211_MLD_MAX_NUM_LINKS]
    }
    structure link_station_info {
      filled
      rates
      ...etc // all link specific fields
    }

  - Split station_info structure into station specific and link specific
    fields- (station_info and link_station_info).
  - Add array pointers in station_info structure for link_station_info.
    for non-ML use links[0], for ML use *links for each valid links.
  - Nl80211_get_station() - locally define sinfo, call -.get_station() ops.
  - Once link station information filled, fill mld level information in
    cfg80211_sta_set_mld_sinfo() for MLO.
  - Introduce a flag to indicate if driver provides per-link station
    statistics or not and embed NL attributes accordingly.

 mac80211:
  - Sta_set_sinfo() - fill station specific information and call
    sta_set_link_sinfo()
     a. If MLO and driver provides per-link statistics
         - For each link fill link specific data in *links[link_id]
         - Call mac80211 ops for each link- .link_sta_statistics() to
           fill link statistics.
     b. If non-ML or driver does not provides per-link statistics
         - Fill link level data for links[0]
         - Call mac80211 ops- .link_sta_statistics() to fill link statistics
  - Maintain accumulated data for removed links in sta_info structure
    and fill in to station_info structure for consistency.

Sarika Sharma (12):
  wifi: cfg80211: reorg sinfo structure elements for mesh
  wifi: mac80211: add API to populated mesh related fields in sinfo
  wifi: mac80211: add support towards MLO handling of station statistics
  wifi: mac80211: introduce sta_set_link_sinfo API to add support
    towards MLO statistics
  wifi: cfg80211: introduced nl80211_fill_link_station API for link
    attributes towards MLO
  wifi: cfg80211: reorg sinfo structure elements for MLO
  wifi: cfg80211: extend statistics for link level in sinfo
  wifi: cfg80211: add flag to indicate driver supports ML station
    statistics
  wifi: cfg80211: add accumulated statistics for MLO links
  wifi: mac80211: add support to accumulate removed link statistics
  wifi: cfg80211: add additional MLO statistics
  wifi: ath12k: correctly fetch arsta for MLO

 drivers/net/wireless/ath/ath10k/mac.c         |   6 +-
 drivers/net/wireless/ath/ath11k/mac.c         |   6 +-
 drivers/net/wireless/ath/ath12k/mac.c         |  20 +-
 drivers/net/wireless/ath/ath6kl/cfg80211.c    |  56 +--
 drivers/net/wireless/ath/wcn36xx/main.c       |   4 +-
 drivers/net/wireless/ath/wcn36xx/smd.c        |   2 +-
 drivers/net/wireless/ath/wcn36xx/smd.h        |   2 +-
 drivers/net/wireless/ath/wil6210/cfg80211.c   |  32 +-
 drivers/net/wireless/ath/wil6210/debugfs.c    |  11 +-
 .../broadcom/brcm80211/brcmfmac/cfg80211.c    |  74 ++--
 drivers/net/wireless/intel/iwlwifi/dvm/lib.c  |   2 +-
 .../net/wireless/intel/iwlwifi/mvm/mac80211.c |   4 +-
 .../wireless/intel/iwlwifi/mvm/mld-mac80211.c |   2 +-
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h  |   2 +-
 drivers/net/wireless/marvell/libertas/cfg.c   |  19 +-
 .../net/wireless/marvell/mwifiex/cfg80211.c   |  60 ++--
 .../net/wireless/mediatek/mt76/mt7915/main.c  |   4 +-
 .../net/wireless/mediatek/mt76/mt7921/main.c  |   2 +-
 .../net/wireless/mediatek/mt76/mt7925/main.c  |   2 +-
 drivers/net/wireless/mediatek/mt76/mt792x.h   |   2 +-
 .../net/wireless/mediatek/mt76/mt792x_core.c  |   2 +-
 .../net/wireless/mediatek/mt76/mt7996/main.c  |   4 +-
 .../net/wireless/quantenna/qtnfmac/commands.c |  60 ++--
 drivers/net/wireless/realtek/rtl8xxxu/core.c  |   4 +-
 drivers/net/wireless/realtek/rtw88/mac80211.c |   4 +-
 drivers/net/wireless/realtek/rtw89/mac80211.c |   4 +-
 drivers/net/wireless/ti/wlcore/main.c         |   4 +-
 drivers/net/wireless/virtual/virt_wifi.c      |  10 +-
 include/net/cfg80211.h                        | 214 +++++++----
 include/net/mac80211.h                        |  21 +-
 net/mac80211/driver-ops.h                     |  14 +-
 net/mac80211/ethtool.c                        |  31 +-
 net/mac80211/ibss.c                           |   4 +-
 net/mac80211/sta_info.c                       | 340 ++++++++++++------
 net/mac80211/sta_info.h                       |  30 +-
 net/mac80211/trace.h                          |   2 +-
 net/mac80211/util.c                           |  18 +-
 net/wireless/nl80211.c                        | 305 +++++++++++++---
 net/wireless/trace.h                          |  33 +-
 net/wireless/util.c                           |   6 +-
 net/wireless/wext-compat.c                    |  22 +-
 41 files changed, 954 insertions(+), 490 deletions(-)


base-commit: c61da149b9c2e439abe27845a71dae5ce5f5985c