[PATCH v5 0/2] wifi: mt76: mt7925: per-channel survey dump during scan

[Michael Shih <michael.shih@mediatek.com>]

This series improves channel survey reporting for mt7925 so that
"iw <dev> survey dump" shows meaningful per-channel airtime.

Patch 1 adds a stats debugfs infrastructure (shared stats.c/stats.h and
the firmware MIB plumbing) that patch 2 builds on.

Patch 2 wires up two channel survey accounting paths on top of it:
 - the home/operating channel, settled from assign_vif_chanctx() since
   mt7925 is firmware/chanctx managed and never goes through
   __mt76_set_channel(); and
 - the scanned channels, folded in from the per-channel airtime carried
   by the firmware scan-done CHNLINFO event.

After the series, both the connected channel and every channel visited
during a firmware-offloaded scan report non-zero active/busy/rx/tx time.

Changes since v4:
---
v2: (1) Remove redundant code to fix build errors. 
    (2) Move UNI_CMD_MIB_DATA enum definition from 'mt76/mt76_connac_mcu.h' to
        'mt7925/stats.h' to avoid redeclartion with 'mt76/mt7996/mcu.h'
v3: (1) Remove redundant code to fix build errors. 
    (2) Move UNI_CMD_MIB_DATA enum definition from 'mt76/mt76_connac_mcu.h' to
        'mt7925/stats.h' to avoid redeclartion with 'mt76/mt7996/mcu.h'
v4: (1) Fix inconsistent indenting.
    (2) Fix array offset 'band_idx' as to before use, not after use.
v5: Adding the second patch for supporting channel survey command: "iw <dev> survey dump"
---
Michael Shih (2):
  wifi: mt76: mt7928: Add debugfs for stats to provide debug purpose
  wifi: mt76: mt7925: support per-channel survey dump during scan

 drivers/net/wireless/mediatek/mt76/mac80211.c |   3 +-
 drivers/net/wireless/mediatek/mt76/mt76.h     |   2 +
 .../wireless/mediatek/mt76/mt76_connac_mcu.h  | 173 ++++
 .../wireless/mediatek/mt76/mt7925/Makefile    |   2 +-
 .../wireless/mediatek/mt76/mt7925/debugfs.c   | 344 +++++++
 .../net/wireless/mediatek/mt76/mt7925/main.c  |  12 +
 .../net/wireless/mediatek/mt76/mt7925/mcu.h   |  30 +
 .../wireless/mediatek/mt76/mt7925/mt7925.h    |   7 +
 .../net/wireless/mediatek/mt76/mt7925/pci.c   |   2 +-
 .../net/wireless/mediatek/mt76/mt7925/stats.c | 884 ++++++++++++++++++
 .../net/wireless/mediatek/mt76/mt7925/stats.h | 315 +++++++
 .../net/wireless/mediatek/mt76/mt7925/usb.c   |   2 +-
 drivers/net/wireless/mediatek/mt76/mt792x.h   |   6 +
 13 files changed, 1778 insertions(+), 4 deletions(-)
 create mode 100644 drivers/net/wireless/mediatek/mt76/mt7925/stats.c
 create mode 100644 drivers/net/wireless/mediatek/mt76/mt7925/stats.h

-- 
2.45.2