From:   Stanislaw Gruszka <sgruszka@redhat.com>
Cc:     Felix Fietkau <nbd@nbd.name>, linux-wireless@vger.kernel.org,
        Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Subject: [PATCH 00/11] mt76x02: AP support for USB with PS 
Date:   Mon,  4 Mar 2019 10:48:05 +0100
Message-Id: <1551692896-7062-1-git-send-email-sgruszka@redhat.com>
To:     unlisted-recipients:; (no To-header on input)
Sender: linux-wireless-owner@vger.kernel.org
Precedence: bulk

On USB we do not have available PSD queue. Using standard AC queues is
unreliable for sending PS buffered frames, stations can go sleep again
before frames are sent. Only reliable way I could find to sent broadcast
PS buffered frames is put them into beacon data registers, then frames
are sent just after proper beacon. HW do the work when we encrypt the 
frames in software.

I tested functionality used arping to iwlwifi station that do
aggressive PS, it works like this:

# arping -c 1 -I wlan0 192.168.9.110 
ARPING 192.168.9.110 from 192.168.9.1 wlan0
Unicast reply from 192.168.9.110 [4C:34:88:5E:76:D5]  324.885ms
Sent 1 probes (1 broadcast(s))

Otherwise arping fails:

# arping -c 1 -I wlan0 192.168.9.110 
ARPING 192.168.9.110 from 192.168.1.148 wlan0
Sent 1 probes (1 broadcast(s))
Received 0 response(s)

I'm not sure how to test mt76_release_buffered_frames functionality.
Also I have not tested on MMIO hardware, but for this only code
movement was done so things should not break.

RFC -> v1:
- do no remove set_tim
- add tbtt_start/stop for mt76x2u
- rebase on top of:
  [PATCH 0/5] introduce mt76_sw_queue data structure
  https://lore.kernel.org/linux-wireless/cover.1551533068.git.lorenzo@kernel.org/

Stanislaw Gruszka (11):
  mt76x02: introduce mt76x02_beacon.c
  mt76x02: add hrtimer for pre TBTT for USB
  mt76x02: introduce beacon_ops
  mt76x02u: implement beacon_ops
  mt76x02: generalize some mmio beaconing functions
  mt76x02u: add sta_ps
  mt76x02: disable HW encryption for group frames
  mt76x02u: implement pre TBTT work for USB
  mt76x02u: add mt76_release_buffered_frames
  mt76: unify set_tim
  mt76x02: enable AP mode for USB

 drivers/net/wireless/mediatek/mt76/Makefile   |   2 +-
 drivers/net/wireless/mediatek/mt76/mac80211.c |   7 +
 drivers/net/wireless/mediatek/mt76/mt76.h     |   2 +
 .../net/wireless/mediatek/mt76/mt7603/main.c  |   8 +-
 .../net/wireless/mediatek/mt76/mt76x0/init.c  |   1 -
 .../net/wireless/mediatek/mt76/mt76x0/main.c  |   8 +-
 .../net/wireless/mediatek/mt76/mt76x0/pci.c   |  11 +-
 .../net/wireless/mediatek/mt76/mt76x0/usb.c   |  10 +-
 drivers/net/wireless/mediatek/mt76/mt76x02.h  |  22 ++
 .../wireless/mediatek/mt76/mt76x02_beacon.c   | 308 ++++++++++++++++++
 .../net/wireless/mediatek/mt76/mt76x02_mac.c  | 138 --------
 .../net/wireless/mediatek/mt76/mt76x02_mmio.c | 131 +++-----
 .../net/wireless/mediatek/mt76/mt76x02_regs.h |   5 +-
 .../net/wireless/mediatek/mt76/mt76x02_usb.h  |   2 +
 .../wireless/mediatek/mt76/mt76x02_usb_core.c | 153 +++++++++
 .../net/wireless/mediatek/mt76/mt76x02_util.c |  77 +----
 .../wireless/mediatek/mt76/mt76x2/pci_init.c  |   2 +-
 .../wireless/mediatek/mt76/mt76x2/pci_main.c  |   8 +-
 .../net/wireless/mediatek/mt76/mt76x2/usb.c   |   1 +
 .../wireless/mediatek/mt76/mt76x2/usb_init.c  |   2 +-
 .../wireless/mediatek/mt76/mt76x2/usb_main.c  |   6 +
 drivers/net/wireless/mediatek/mt76/usb.c      |   7 +-
 22 files changed, 582 insertions(+), 329 deletions(-)
 create mode 100644 drivers/net/wireless/mediatek/mt76/mt76x02_beacon.c

-- 
2.20.1