[RFC v2] ath11k: enable non-wow suspend and resume

[Pavel Procopiuc]

> For QCA6390, it needs to power down target when system suspends and
> needs to power up target when system resumes in non-wow scenario.
> 
> The power up procedure downloads firmware again.

I've tried the patch against 5.10-rc3 (with 7fef431be9c9 reverted) and resuming from the suspend didn't bring up the 
wireless card QCA6390 (in Dell XPS 17):

$ journalctl -b | grep -iP '05:00|ath11k|Linux version'
Nov 13 13:47:51 razor kernel: Linux version 5.10.0-rc3 (root at razor) (gcc (Gentoo 9.3.0-r1 p3) 9.3.0, GNU ld (Gentoo 2.34 
p6) 2.34.0) #8 SMP Thu Nov 12 13:56:10 CET 2020
Nov 13 13:47:51 razor kernel: pci 0000:05:00.0: [17cb:1101] type 00 class 0x028000
Nov 13 13:47:51 razor kernel: pci 0000:05:00.0: reg 0x10: [mem 0xd2100000-0xd21fffff 64bit]
Nov 13 13:47:51 razor kernel: pci 0000:05:00.0: PME# supported from D0 D3hot D3cold
Nov 13 13:47:51 razor kernel: pci 0000:05:00.0: 4.000 Gb/s available PCIe bandwidth, limited by 5.0 GT/s PCIe x1 link at 
0000:00:1c.1 (capable of 7.876 Gb/s with 8.0 GT/s PCIe x1 link)
Nov 13 13:47:51 razor kernel: pci 0000:05:00.0: Adding to iommu group 21
Nov 13 13:47:52 razor kernel: ath11k_pci 0000:05:00.0: WARNING: ath11k PCI support is experimental!
Nov 13 13:47:52 razor kernel: ath11k_pci 0000:05:00.0: BAR 0: assigned [mem 0xd2100000-0xd21fffff 64bit]
Nov 13 13:47:52 razor kernel: ath11k_pci 0000:05:00.0: enabling device (0000 -> 0002)
Nov 13 13:47:52 razor kernel: mhi 0000:05:00.0: Requested to power ON
Nov 13 13:47:52 razor kernel: mhi 0000:05:00.0: Power on setup success
Nov 13 13:47:52 razor kernel: ath11k_pci 0000:05:00.0: Respond mem req failed, result: 1, err: 0
Nov 13 13:47:52 razor kernel: ath11k_pci 0000:05:00.0: qmi failed to respond fw mem req:-22
Nov 13 13:47:52 razor kernel: ath11k_pci 0000:05:00.0: chip_id 0x0 chip_family 0xb board_id 0xff soc_id 0xffffffff
Nov 13 13:47:52 razor kernel: ath11k_pci 0000:05:00.0: fw_version 0x101c06cc fw_build_timestamp 2020-06-24 19:50 fw_build_id
Nov 13 13:47:54 razor NetworkManager[791]: <info>  [1605271674.1171] rfkill1: found Wi-Fi radio killswitch (at 
/sys/devices/pci0000:00/0000:00:1c.1/0000:05:00.0/ieee80211/phy0/rfkill1) (driver ath11k_pci)
Nov 13 13:47:56 razor ModemManager[728]: <info>  Couldn't check support for device 
'/sys/devices/pci0000:00/0000:00:1c.1/0000:05:00.0': not supported by any plugin

... suspended and resumed here ...

Nov 13 14:09:13 razor kernel: ath11k_pci 0000:05:00.0: link down error during global reset
Nov 13 14:09:13 razor kernel: ath11k_pci 0000:05:00.0: link down error during global reset
Nov 13 14:09:13 razor kernel: DMAR: [INTR-REMAP] Request device [05:00.0] fault index 80 [fault reason 34] Present field 
in the IRTE entry is clear
Nov 13 14:09:13 razor kernel: mhi 0000:05:00.0: Requested to power ON
Nov 13 14:09:13 razor kernel: mhi 0000:05:00.0: Power on setup success
Nov 13 14:09:13 razor kernel: ath11k_pci 0000:05:00.0: Respond mem req failed, result: 1, err: 0
Nov 13 14:09:13 razor kernel: ath11k_pci 0000:05:00.0: qmi failed to respond fw mem req:-22
Nov 13 14:09:13 razor kernel: ath11k_pci 0000:05:00.0: chip_id 0x0 chip_family 0xb board_id 0xff soc_id 0xffffffff
Nov 13 14:09:13 razor kernel: ath11k_pci 0000:05:00.0: fw_version 0x101c06cc fw_build_timestamp 2020-06-24 19:50 fw_build_id
Nov 13 14:09:13 razor kernel: ath11k_pci 0000:05:00.0: failed to connect to HTT: -108
Nov 13 14:09:13 razor kernel: ath11k_pci 0000:05:00.0: failed to start core: -108
Nov 13 14:09:16 razor ModemManager[728]: <info>  Couldn't check support for device 
'/sys/devices/pci0000:00/0000:00:1c.1/0000:05:00.0': not supported by any plugin
Nov 13 14:09:17 razor kernel: ath11k_pci 0000:05:00.0: wait mac start timeout
Nov 13 14:09:17 razor kernel: ath11k_pci 0000:05:00.0: failed to send WMI_PDEV_SET_PARAM cmd
Nov 13 14:09:17 razor kernel: ath11k_pci 0000:05:00.0: failed to enable PMF QOS: (-108
Nov 13 14:09:17 razor kernel: ath11k_pci 0000:05:00.0: failed to send WMI_PDEV_SET_PARAM cmd
Nov 13 14:09:17 razor kernel: ath11k_pci 0000:05:00.0: failed to enable PMF QOS: (-108
Nov 13 14:09:17 razor kernel: ath11k_pci 0000:05:00.0: failed to send WMI_PDEV_SET_PARAM cmd
Nov 13 14:09:17 razor kernel: ath11k_pci 0000:05:00.0: failed to enable PMF QOS: (-108
Nov 13 14:09:27 razor kernel: ath11k_pci 0000:05:00.0: failed to send WMI_PDEV_SET_PARAM cmd
Nov 13 14:09:27 razor kernel: ath11k_pci 0000:05:00.0: failed to enable PMF QOS: (-108
Nov 13 14:09:27 razor kernel: ath11k_pci 0000:05:00.0: failed to send WMI_PDEV_SET_PARAM cmd
Nov 13 14:09:27 razor kernel: ath11k_pci 0000:05:00.0: failed to enable PMF QOS: (-108
Nov 13 14:09:37 razor kernel: ath11k_pci 0000:05:00.0: failed to send WMI_PDEV_SET_PARAM cmd
Nov 13 14:09:37 razor kernel: ath11k_pci 0000:05:00.0: failed to enable PMF QOS: (-108
Nov 13 14:09:37 razor kernel: ath11k_pci 0000:05:00.0: failed to send WMI_PDEV_SET_PARAM cmd
Nov 13 14:09:37 razor kernel: ath11k_pci 0000:05:00.0: failed to enable PMF QOS: (-108
Nov 13 14:09:41 razor NetworkManager[791]: <info>  [1605272981.9889] radio killswitch 
/sys/devices/pci0000:00/0000:00:1c.1/0000:05:00.0/ieee80211/phy0/rfkill1 disappeared