RFC wifi: ath11k: hibernation support

From: Kalle Valo <[email protected]>

Currently in ath11k we keep the firmware running on the WLAN device when the network interface (wlan0) is down. The problem is that this will break hibernation, obviously the firmware can't be running after the whole system is powered off. To power down the ath11k firmware for suspend/hibernation some changes both in MHI subsystem and ath11k is needed.

This patchset fixes a longstanding bug report about broken hibernation support:

https://bugzilla.kernel.org/show_bug.cgi?id=214649

This patchset is marked as RFC as it requires changes in MHI subsystem. Also this has been tested only on WCN6855, need to test also on more AP based chipsets like IPQ8074 and QCN9074.

The patches are also available at:

https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/log/?h=ath11k-hibernation-support

Earlier versions of this patchset have been tested by multiple users with positive results.

v2:

* rebase to ath-202311221826 (6.7.0-rc2-wt-ath+)

* 'bus: mhi: host: add mhi_power_down_no_destroy()': fix null state string for DEV_ST_TRANSITION_DISABLE_DESTROY_DEVICE

* 'bus: mhi: host: add new interfaces to handle MHI channels directly': fix typos in comments

* 'bus: mhi: host: add new interfaces to handle MHI channels directly': honour initial autoqueue configuration

* 'bus: mhi: host: add new interfaces to handle MHI channels directly': don't prepare/unprepare MHI devices that don't match with a MHI client driver

* 'wifi: ath11k: remove MHI LOOPBACK channels': remove LOOPBACK channels for QCN9074 as well

v1: https://lore.kernel.org/mhi/[email protected]/

Baochen Qiang (7):
bus: mhi: host: add mhi_power_down_no_destroy()
bus: mhi: host: add new interfaces to handle MHI channels directly
wifi: ath11k: handle irq enable/disable in several code path
wifi: ath11k: remove MHI LOOPBACK channels
wifi: ath11k: do not dump SRNG statistics during resume
wifi: ath11k: fix warning on DMA ring capabilities event
wifi: ath11k: support hibernation

Kalle Valo (1):
wifi: ath11k: thermal: don't try to register multiple times

 drivers/bus/mhi/host/init.c               |   1 +
 drivers/bus/mhi/host/internal.h           |   1 +
 drivers/bus/mhi/host/main.c               | 107 ++++++++++++++++++++++
 drivers/bus/mhi/host/pm.c                 |  26 ++++--
 drivers/net/wireless/ath/ath11k/ahb.c     |   8 +-
 drivers/net/wireless/ath/ath11k/core.c    |  44 +++++----
 drivers/net/wireless/ath/ath11k/core.h    |   2 +
 drivers/net/wireless/ath/ath11k/hif.h     |  12 +--
 drivers/net/wireless/ath/ath11k/mhi.c     |  77 ++++------------
 drivers/net/wireless/ath/ath11k/mhi.h     |   4 +-
 drivers/net/wireless/ath/ath11k/pci.c     |  55 +++++++++--
 drivers/net/wireless/ath/ath11k/qmi.c     |   7 +-
 drivers/net/wireless/ath/ath11k/thermal.c |   3 +
 drivers/net/wireless/ath/ath11k/wmi.c     |   1 +
 include/linux/mhi.h                       |  47 +++++++++-
 15 files changed, 285 insertions(+), 110 deletions(-)

base-commit: 16a212b4f33c4edd9ce9a9e0953b5389216e8ed9

2.39.2