ath11k-qca6390-bringup-202011191920: new suspend implementation

[Pavel Procopiuc]

> All feedback very welcome, both positive and negative. In the reports
> try to include at least:
> 
> * name of the tag

ath11k-qca6390-bringup-202011301608 cleanly rebased on top of the vanilla 5.10.0-rc6

> * if there are other changes in the kernel, reverts etc

Only kernel argument memmap=20M$12M is used.

> * make and model of the laptop/computer (eg. Dell XPS 9310)

Dell XPS 17 (9700) with i9 CPU (only those come with QCA9390 wifi module), BIOS version: 1.5.0

Everything works perfectly, suspend/resume works too.

Without the aforementioned memmap kernel argument the wireless card firmware doesn't load:

Dec 02 19:37:35 razor kernel: Linux version 5.10.0-rc6 (root at razor) (gcc (Gentoo 9.3.0-r1 p3) 9.3.0, GNU ld (Gentoo 2.34 
p6) 2.34.0) #6 SMP Wed Dec 2 19:33:41 CET 2020
Dec 02 19:37:35 razor kernel:   DMA zone: 64 pages used for memmap
Dec 02 19:37:35 razor kernel:   DMA32 zone: 5213 pages used for memmap
Dec 02 19:37:35 razor kernel:   Normal zone: 255840 pages used for memmap
Dec 02 19:37:35 razor kernel: pci 0000:05:00.0: [17cb:1101] type 00 class 0x028000
Dec 02 19:37:35 razor kernel: pci 0000:05:00.0: reg 0x10: [mem 0xd2100000-0xd21fffff 64bit]
Dec 02 19:37:35 razor kernel: pci 0000:05:00.0: PME# supported from D0 D3hot D3cold
Dec 02 19:37:35 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)
Dec 02 19:37:35 razor kernel: pci 0000:05:00.0: Adding to iommu group 21
Dec 02 19:37:36 razor kernel: ath11k_pci 0000:05:00.0: WARNING: ath11k PCI support is experimental!
Dec 02 19:37:36 razor kernel: ath11k_pci 0000:05:00.0: BAR 0: assigned [mem 0xd2100000-0xd21fffff 64bit]
Dec 02 19:37:36 razor kernel: ath11k_pci 0000:05:00.0: enabling device (0000 -> 0002)
Dec 02 19:37:36 razor kernel: ath11k_pci 0000:05:00.0: MSI vectors: 32
Dec 02 19:37:36 razor kernel: mhi 0000:05:00.0: Requested to power ON
Dec 02 19:37:36 razor kernel: mhi 0000:05:00.0: Power on setup success
Dec 02 19:37:36 razor kernel: ath11k_pci 0000:05:00.0: qmi req mem_seg[0] 0x1800000 3522560 1
Dec 02 19:37:36 razor kernel: ath11k_pci 0000:05:00.0: qmi req mem_seg[1] 0x1500000 884736 4
Dec 02 19:37:36 razor kernel: ath11k_pci 0000:05:00.0: firmware crashed: MHI_CB_SYS_ERROR
Dec 02 19:37:42 razor kernel: ath11k_pci 0000:05:00.0: qmi failed memory request, err = -110
Dec 02 19:37:42 razor kernel: ath11k_pci 0000:05:00.0: qmi failed to respond fw mem req:-110
Dec 02 19:39:07 razor kernel: mhi 0000:05:00.0: Device failed to exit MHI Reset state