From: Ian.Campbell@citrix.com (Ian Campbell)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 3/7] [RFC] arm/arm64: introduce is_dma_coherent
Date: Sat, 25 Oct 2014 16:40:29 +0100 [thread overview]
Message-ID: <1414251629.3584.20.camel@citrix.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1410251424350.22875@kaball.uk.xensource.com>
On Sat, 2014-10-25 at 14:29 +0100, Stefano Stabellini wrote:
>
> Your suggestions and looking more at the code gave me another idea, that
> I think is clean and at the same time suitable for 3.18.
> What do you think of the following? It is simple, self-contained and
> doesn't need a new flag in struct device.
of_dma_is_coherent looks to be quite expensive though (walks up the
Device Tree doing strcmps on each property of each node until it finds
the one it is looking for.
Ian.
WARNING: multiple messages have this Message-ID (diff)
From: Ian Campbell <Ian.Campbell@citrix.com>
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <Will.Deacon@arm.com>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
"david.vrabel@citrix.com" <david.vrabel@citrix.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>
Subject: Re: [PATCH v4 3/7] [RFC] arm/arm64: introduce is_dma_coherent
Date: Sat, 25 Oct 2014 16:40:29 +0100 [thread overview]
Message-ID: <1414251629.3584.20.camel@citrix.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1410251424350.22875@kaball.uk.xensource.com>
On Sat, 2014-10-25 at 14:29 +0100, Stefano Stabellini wrote:
>
> Your suggestions and looking more at the code gave me another idea, that
> I think is clean and at the same time suitable for 3.18.
> What do you think of the following? It is simple, self-contained and
> doesn't need a new flag in struct device.
of_dma_is_coherent looks to be quite expensive though (walks up the
Device Tree doing strcmps on each property of each node until it finds
the one it is looking for.
Ian.
WARNING: multiple messages have this Message-ID (diff)
From: Ian Campbell <Ian.Campbell@citrix.com>
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <Will.Deacon@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"david.vrabel@citrix.com" <david.vrabel@citrix.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v4 3/7] [RFC] arm/arm64: introduce is_dma_coherent
Date: Sat, 25 Oct 2014 16:40:29 +0100 [thread overview]
Message-ID: <1414251629.3584.20.camel@citrix.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1410251424350.22875@kaball.uk.xensource.com>
On Sat, 2014-10-25 at 14:29 +0100, Stefano Stabellini wrote:
>
> Your suggestions and looking more at the code gave me another idea, that
> I think is clean and at the same time suitable for 3.18.
> What do you think of the following? It is simple, self-contained and
> doesn't need a new flag in struct device.
of_dma_is_coherent looks to be quite expensive though (walks up the
Device Tree doing strcmps on each property of each node until it finds
the one it is looking for.
Ian.
next prev parent reply other threads:[~2014-10-25 15:40 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-10 11:50 [PATCH v4 0/7] introduce GNTTABOP_cache_flush Stefano Stabellini
2014-10-10 11:50 ` Stefano Stabellini
2014-10-10 11:50 ` Stefano Stabellini
2014-10-10 11:51 ` [PATCH v4 1/7] xen/arm: remove handling of XENFEAT_grant_map_identity Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-20 15:14 ` Ian Campbell
2014-10-20 15:14 ` Ian Campbell
2014-10-20 15:14 ` Ian Campbell
2014-10-10 11:51 ` [PATCH v4 2/7] xen/arm: remove outer_*_range call Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-10 11:51 ` [PATCH v4 3/7] [RFC] arm/arm64: introduce is_dma_coherent Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-10 12:07 ` Will Deacon
2014-10-10 12:07 ` Will Deacon
2014-10-10 13:04 ` Stefano Stabellini
2014-10-10 13:04 ` Stefano Stabellini
2014-10-13 11:16 ` Stefano Stabellini
2014-10-13 11:16 ` Stefano Stabellini
2014-10-13 12:57 ` Will Deacon
2014-10-13 12:57 ` Will Deacon
2014-10-13 14:43 ` Stefano Stabellini
2014-10-13 14:43 ` Stefano Stabellini
2014-10-22 16:04 ` Stefano Stabellini
2014-10-22 16:04 ` Stefano Stabellini
2014-10-23 14:22 ` Stefano Stabellini
2014-10-23 14:22 ` Stefano Stabellini
2014-10-24 10:47 ` Catalin Marinas
2014-10-24 10:47 ` Catalin Marinas
2014-10-24 11:39 ` Stefano Stabellini
2014-10-24 11:39 ` Stefano Stabellini
2014-10-24 15:43 ` Catalin Marinas
2014-10-24 15:43 ` Catalin Marinas
2014-10-24 17:01 ` Stefano Stabellini
2014-10-24 17:01 ` Stefano Stabellini
2014-10-24 17:29 ` Stefano Stabellini
2014-10-24 17:29 ` Stefano Stabellini
2014-10-25 13:29 ` Stefano Stabellini
2014-10-25 13:29 ` Stefano Stabellini
2014-10-25 13:29 ` Stefano Stabellini
2014-10-25 15:40 ` Ian Campbell [this message]
2014-10-25 15:40 ` Ian Campbell
2014-10-25 15:40 ` Ian Campbell
2014-10-25 16:15 ` Stefano Stabellini
2014-10-25 16:15 ` Stefano Stabellini
2014-10-25 16:15 ` Stefano Stabellini
2014-10-27 11:02 ` [Xen-devel] " David Vrabel
2014-10-27 11:02 ` David Vrabel
2014-10-27 11:02 ` David Vrabel
2014-10-27 15:22 ` Stefano Stabellini
2014-10-27 15:22 ` Stefano Stabellini
2014-10-10 11:51 ` [PATCH v4 4/7] xen/arm: use is_dma_coherent Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-20 15:18 ` Ian Campbell
2014-10-20 15:18 ` Ian Campbell
2014-10-20 15:18 ` Ian Campbell
2014-10-10 11:51 ` [PATCH v4 5/7] xen/arm/arm64: merge xen/mm32.c into xen/mm.c Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-20 15:19 ` Ian Campbell
2014-10-20 15:19 ` Ian Campbell
2014-10-20 15:19 ` Ian Campbell
2014-10-10 11:51 ` [PATCH v4 6/7] xen/arm/arm64: introduce xen_arch_need_swiotlb Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-14 16:03 ` Konrad Rzeszutek Wilk
2014-10-14 16:03 ` Konrad Rzeszutek Wilk
2014-10-14 16:12 ` David Vrabel
2014-10-14 16:12 ` David Vrabel
2014-10-14 16:12 ` David Vrabel
2014-10-14 16:21 ` Konrad Rzeszutek Wilk
2014-10-14 16:21 ` Konrad Rzeszutek Wilk
2014-10-10 11:51 ` [PATCH v4 7/7] xen/arm: introduce GNTTABOP_cache_flush Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-10 11:51 ` Stefano Stabellini
2014-10-20 15:50 ` Ian Campbell
2014-10-20 15:50 ` Ian Campbell
2014-10-20 15:50 ` Ian Campbell
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