netdev - Re: [PATCH] iwlwifi: pcie: reduce "unsupported splx" to a warning

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Date:   Wed, 12 Oct 2016 14:36:27 +0200
From:   Paul Bolle <pebolle@...cali.nl>
To:     Luca Coelho <luca@...lho.fi>, Chris Rorvick <chris@...vick.com>
Cc:     Intel Linux Wireless <linuxwifi@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Oren Givon <oren.givon@...el.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iwlwifi: pcie: reduce "unsupported splx" to a warning

On Wed, 2016-10-12 at 15:24 +0300, Luca Coelho wrote:
> Okay... Actually this is a structure in the BIOS and the actual method
> we call is SPLC.  The SPLC method may return one item from this table,
> or something entirely different, possible one of the three values
> depending on a configuration option or so.
> 
> Can you to find and send me the actual SPLC method that we call, from
> your BIOS?

It seems Chris and I basically have identical setups, so I'll answer.

There are 20 SPLC methods in the BIOS. The first reads
    Method (SPLC, 0, Serialized)
    {
        DerefOf (SPLX [One]) [Zero] = DOM1 /* \DOM1 */
        DerefOf (SPLX [One]) [One] = LIM1 /* \LIM1 */
        DerefOf (SPLX [One]) [0x02] = TIM1 /* \TIM1 */
        DerefOf (SPLX [0x02]) [Zero] = DOM2 /* \DOM2 */
        DerefOf (SPLX [0x02]) [One] = LIM2 /* \LIM2 */
        DerefOf (SPLX [0x02]) [0x02] = TIM2 /* \TIM2 */
        DerefOf (SPLX [0x03]) [Zero] = DOM3 /* \DOM3 */
        DerefOf (SPLX [0x03]) [One] = LIM3 /* \LIM3 */
        DerefOf (SPLX [0x03]) [0x02] = TIM3 /* \TIM3 */
        Return (SPLX) /* \_SB_.PCI0.RP01.PXSX.SPLX */
    }

The only difference is in the last comment. Ie, RP01 is increased until
it reaches RP20. (The machine has 20 PCI devices according to lspci. I
have no clue how to match that RPxx number to the 20 devices showing up
in lspci, sorry.)


Paul Bolle