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From: Robin Murphy <robin.murphy@arm.com>
To: "Roger Quadros" <rogerq@ti.com>, "Christoph Hellwig" <hch@lst.de>,
	"Péter Ujfalusi" <peter.ujfalusi@ti.com>,
	"Murali Karicheri" <m-karicheri2@ti.com>,
	"Nori, Sekhar" <nsekhar@ti.com>, "Anna, Suman" <s-anna@ti.com>
Cc: stefan.wahren@i2se.com, afaerber@suse.de, hverkuil@xs4all.nl,
	Rob Herring <robh+dt@kernel.org>,
	devicetree@vger.kernel.org,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Nishanth Menon <nm@ti.com>,
	"hdegoede@redhat.com" <hdegoede@redhat.com>
Subject: Re: dma_mask limited to 32-bits with OF platform device
Date: Wed, 12 Feb 2020 14:04:31 +0000	[thread overview]
Message-ID: <9bd83815-6f54-2efb-9398-42064f73ab1c@arm.com> (raw)
In-Reply-To: <56314192-f3c6-70c5-6b9a-3d580311c326@ti.com>

On 12/02/2020 12:33 pm, Roger Quadros wrote:
[...]
> For now, let's say that we limit dma-ranges to 4GB size. with 
> "dma-ranges = <0x00000000 0x00000000 0x1 0x00000000>;"
> Then, dma_bus_limit is set correctly to 0xffffffff, SATA driver sets 
> masks to 64-bit as IP supports that.
> 
> [   13.306847] ahci 4a140000.sata: dma_mask 0xffffffffffffffff, 
> coherent_mask 0xffffffffffffffff, dma_bus_limit 0xffffffff
> 
> However, the SATA controller still tries to do DMA above 32-bits.
> dma_alloc() doesn't seem to be taking dma_bus_limit into account?

Yay ARM LPAE... Peter and Christoph have already been playing 
whack-a-mole with other bugs under that config - is this with or without 
SWIOTLB? (and whichever way, does the other work any better?)

Robin.

  reply	other threads:[~2020-02-12 14:04 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-12 10:49 Roger Quadros
2020-02-12 11:37 ` Robin Murphy
2020-02-12 12:33   ` Roger Quadros
2020-02-12 14:04     ` Robin Murphy [this message]
2020-02-12 17:57       ` Christoph Hellwig
2020-02-17 13:21       ` Christoph Hellwig
2020-02-17 14:54         ` Peter Ujfalusi
2020-02-18  7:26           ` Peter Ujfalusi
2020-02-18  8:28         ` Roger Quadros
2020-02-18 17:22           ` Rob Herring
2020-02-19 14:29             ` Roger Quadros
2020-02-19 15:25               ` Robin Murphy
2020-02-19 15:40                 ` Roger Quadros
2020-02-26 11:33                 ` Roger Quadros
2020-03-03  8:27                   ` Roger Quadros
2020-03-03 14:06                     ` Robin Murphy
2020-03-03 19:26                       ` Rob Herring
2020-03-04  8:28                         ` Roger Quadros

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