From: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
To: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org,
x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
sudeep.holla-5wv7dgnIgG8@public.gmane.org,
frowand.list-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
hch-jcswGhMUV9g@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [RFC PATCH 2/4] ACPI/IORT: Set bus DMA mask as appropriate
Date: Tue, 10 Jul 2018 20:04:58 +0200 [thread overview]
Message-ID: <20180710180458.GC26285@lst.de> (raw)
In-Reply-To: <c604b3eae4103ee0ad6da84baa1bc893a81ef5f8.1531239284.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
On Tue, Jul 10, 2018 at 06:17:17PM +0100, Robin Murphy wrote:
> When an explicit DMA limit is described by firmware, we need to remember
> it regardless of how drivers might subsequently update their devices'
> masks. The new bus_dma_mask field does that.
Shouldn't we also stop presetting the dma mask after this?
WARNING: multiple messages have this Message-ID (diff)
From: hch@lst.de (Christoph Hellwig)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 2/4] ACPI/IORT: Set bus DMA mask as appropriate
Date: Tue, 10 Jul 2018 20:04:58 +0200 [thread overview]
Message-ID: <20180710180458.GC26285@lst.de> (raw)
In-Reply-To: <c604b3eae4103ee0ad6da84baa1bc893a81ef5f8.1531239284.git.robin.murphy@arm.com>
On Tue, Jul 10, 2018 at 06:17:17PM +0100, Robin Murphy wrote:
> When an explicit DMA limit is described by firmware, we need to remember
> it regardless of how drivers might subsequently update their devices'
> masks. The new bus_dma_mask field does that.
Shouldn't we also stop presetting the dma mask after this?
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Robin Murphy <robin.murphy@arm.com>
Cc: hch@lst.de, m.szyprowski@samsung.com,
iommu@lists.linux-foundation.org,
linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
lorenzo.pieralisi@arm.com, hanjun.guo@linaro.org,
sudeep.holla@arm.com, robh+dt@kernel.org, frowand.list@gmail.com,
gregkh@linuxfoundation.org, joro@8bytes.org, x86@kernel.org
Subject: Re: [RFC PATCH 2/4] ACPI/IORT: Set bus DMA mask as appropriate
Date: Tue, 10 Jul 2018 20:04:58 +0200 [thread overview]
Message-ID: <20180710180458.GC26285@lst.de> (raw)
In-Reply-To: <c604b3eae4103ee0ad6da84baa1bc893a81ef5f8.1531239284.git.robin.murphy@arm.com>
On Tue, Jul 10, 2018 at 06:17:17PM +0100, Robin Murphy wrote:
> When an explicit DMA limit is described by firmware, we need to remember
> it regardless of how drivers might subsequently update their devices'
> masks. The new bus_dma_mask field does that.
Shouldn't we also stop presetting the dma mask after this?
next prev parent reply other threads:[~2018-07-10 18:04 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-10 17:17 [RFC PATCH 0/4] Stop losing firmware-set DMA masks Robin Murphy
2018-07-10 17:17 ` Robin Murphy
2018-07-10 17:17 ` Robin Murphy
2018-07-10 17:17 ` [RFC PATCH 2/4] ACPI/IORT: Set bus DMA mask as appropriate Robin Murphy
2018-07-10 17:17 ` Robin Murphy
2018-07-10 17:17 ` Robin Murphy
[not found] ` <c604b3eae4103ee0ad6da84baa1bc893a81ef5f8.1531239284.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2018-07-10 18:04 ` Christoph Hellwig [this message]
2018-07-10 18:04 ` Christoph Hellwig
2018-07-10 18:04 ` Christoph Hellwig
[not found] ` <20180710180458.GC26285-jcswGhMUV9g@public.gmane.org>
2018-07-11 18:03 ` Robin Murphy
2018-07-11 18:03 ` Robin Murphy
2018-07-11 18:03 ` Robin Murphy
2018-07-10 17:17 ` [RFC PATCH 3/4] of/device: " Robin Murphy
2018-07-10 17:17 ` Robin Murphy
2018-07-10 17:17 ` Robin Murphy
2018-07-10 17:17 ` [RFC PATCH 4/4] iommu/dma: Respect bus DMA limit for IOVAs Robin Murphy
2018-07-10 17:17 ` Robin Murphy
2018-07-10 17:17 ` Robin Murphy
[not found] ` <cover.1531239284.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2018-07-10 17:17 ` [RFC PATCH 1/4] dma-mapping: Generalise dma_32bit_limit flag Robin Murphy
2018-07-10 17:17 ` Robin Murphy
2018-07-10 17:17 ` Robin Murphy
2018-07-10 18:04 ` Christoph Hellwig
2018-07-10 18:04 ` Christoph Hellwig
2018-07-10 18:04 ` Christoph Hellwig
2018-07-11 16:56 ` Robin Murphy
2018-07-11 16:56 ` Robin Murphy
[not found] ` <868cead9-88a7-e58d-3452-a78e19be5f47-5wv7dgnIgG8@public.gmane.org>
2018-07-12 7:20 ` Christoph Hellwig
2018-07-12 7:20 ` Christoph Hellwig
2018-07-12 7:20 ` Christoph Hellwig
2018-07-10 18:02 ` [RFC PATCH 0/4] Stop losing firmware-set DMA masks Christoph Hellwig
2018-07-10 18:02 ` Christoph Hellwig
2018-07-10 18:02 ` Christoph Hellwig
2018-07-10 18:02 ` Christoph Hellwig
[not found] ` <20180710180232.GA26285-jcswGhMUV9g@public.gmane.org>
2018-07-10 18:11 ` Robin Murphy
2018-07-10 18:11 ` Robin Murphy
2018-07-10 18:11 ` Robin Murphy
2018-07-10 18:11 ` Robin Murphy
2018-07-10 18:12 ` Atish Patra
2018-07-10 18:12 ` Atish Patra
2018-07-10 18:12 ` Atish Patra
2018-07-11 14:40 ` Rob Herring
2018-07-11 14:40 ` Rob Herring
[not found] ` <CABGGisxVqLMu3TUpbJGWnUFgzUor-8tdyV8KJeU0YT7y=BHrAQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-07-11 16:03 ` Robin Murphy
2018-07-11 16:03 ` Robin Murphy
2018-07-11 16:03 ` Robin Murphy
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