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Message-ID: <7a8e220d77d7e30a0cfaf984404ef2f57eaa785f.camel@sipsolutions.net>
Subject: Re: iwlwifi: Regression after migrating to 6.6.32
From: Johannes Berg <johannes@sipsolutions.net>
To: Fabio Estevam <festevam@gmail.com>
Cc: miriam.rachel.korenblit@intel.com, kvalo@kernel.org, Jakub Kicinski
	 <kuba@kernel.org>, linux-wireless <linux-wireless@vger.kernel.org>, 
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Date: Tue, 11 Jun 2024 16:50:48 +0200
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On Tue, 2024-06-11 at 11:32 -0300, Fabio Estevam wrote:
> Hi Johannes,
>=20
> I forgot to mention, but the Wifi device I am using is:
>=20
> Intel(R) Wi-Fi 6 AX200 160MHz, REV=3D0x340
>=20
> On Tue, Jun 11, 2024 at 10:54=E2=80=AFAM Johannes Berg
> <johannes@sipsolutions.net> wrote:
>=20
> > > [    5.038174] rxb->offset is 0 trans_pcie->rx_buf_bytes is 4096
> >=20
> > so that looks pretty normal?
> >=20
> > Might be useful to see rx->page_dma too, supported_dma_mask should be
> > 4095 or 2047 depending on the device, but I'm not sure how you could en=
d
> > up with a DMA mapping for a page that's not at least 11 bit aligned?
>=20
> Here it goes:
>=20
> [    4.344218] rxb->offset is 0 trans_pcie->rx_buf_bytes is 4096
> rxb->page_dma is 4215433216 trans_pcie->supported_dma_mask is 4095

> I don't know what a typical rxb->page_dma should be.
>=20

It should be an address (so that's fine), but I don't see how it ends up
not being page-aligned if we request to map a page and 4096 bytes??

Is that platform "weird" with strange page size, or something?

johannes