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rtw89: ps: access TX/RX rings via another registers in low power mode

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In low power mode, we need to pause PCI to configure IMR and PCI ring
index registers accordingly, because the regular registers are power-off
in this mode.

In the transition moment named paused in code, we can't touch ring index,
so don't kick off DMA immediately. Instead, queue them into pending queue,
and kick off after the moment.

There are three low power modes, which are RF off/clock gate/power gate,
but PCI enter low power mode in later two modes only. So, add a mask
to achieve this.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220421120903.73715-7-pkshih@realtek.com
This commit is contained in:
Ping-Ke Shih 2022-04-21 20:08:55 +08:00 • committed by Kalle Valo
commit 52edbb9fb7
8 changed files with 177 additions and 4 deletions
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