From: Christoph Hellwig <hch@lst.de>
To: Roger Quadros <rogerq@ti.com>
Cc: hch@lst.de, "hdegoede@redhat.com" <hdegoede@redhat.com>,
axboe@kernel.dk, iommu@lists.linux-foundation.org,
linux-ide@vger.kernel.org, linux-omap@vger.kernel.org,
jejb@linux.ibm.com, martin.petersen@oracle.com,
rmk+kernel@arm.linux.org.uk, "Nori, Sekhar" <nsekhar@ti.com>,
Vignesh Raghavendra <vigneshr@ti.com>,
Tony Lindgren <tony@atomide.com>
Subject: Re: SATA broken with LPAE
Date: Wed, 26 Jun 2019 14:53:25 +0200 [thread overview]
Message-ID: <20190626125325.GA4744@lst.de> (raw)
In-Reply-To: <16f065ef-f4ac-46b4-de2a-6b5420ae873a@ti.com>
Hi Roger,
it seems the arm dma direct mapping code isn't doing the right thing
here. On other platforms that have > 4G memory we always use swiotlb
for bounce buffering in case a device that can't DMA to all the memory.
Arm is the odd one out and uses its own dmabounce framework instead,
but it seems like it doesn't get used in this case. We need to make
sure dmabounce (or swiotlb for that matter) is set up if > 32-bit
addressing is supported. I'm not really an arm platform expert,
but some of those on the Cc list are and might chime in on how to
do that.
next prev parent reply other threads:[~2019-06-26 12:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-26 8:43 SATA broken with LPAE Roger Quadros
2019-06-26 12:53 ` Christoph Hellwig [this message]
2019-06-27 9:07 ` Russell King - ARM Linux admin
2019-06-27 9:15 ` Christoph Hellwig
2019-06-27 10:09 ` Russell King - ARM Linux admin
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