On Fri, May 30, 2014 at 09:54:37PM +0200, Arnd Bergmann wrote:
On Friday 30 May 2014 22:29:13 Hiroshi Doyu wrote:
IIUC the original problem, a master with 8 streamIDs means something
like below, where some devices have multiple IDs but some have a
single. A sinle #address-cells cannot
On Wednesday 04 June 2014 15:44:03 Thierry Reding wrote:
Well, the iommu specific binding could allow a variable #address-cells.
That way, you just need to know the number of stream IDs for that instance
of the iommu.
That sounds fairly complicated to me. I don't see what that buys us
On Wed, Jun 04, 2014 at 02:44:03PM +0100, Thierry Reding wrote:
On Fri, May 30, 2014 at 09:54:37PM +0200, Arnd Bergmann wrote:
On Friday 30 May 2014 22:29:13 Hiroshi Doyu wrote:
The disadvantage of this is that this limits the max number of streamIDs
to support. If # of streamID is
On Wednesday 04 June 2014 14:56:01 Will Deacon wrote:
On Wed, Jun 04, 2014 at 02:44:03PM +0100, Thierry Reding wrote:
On Fri, May 30, 2014 at 09:54:37PM +0200, Arnd Bergmann wrote:
On Friday 30 May 2014 22:29:13 Hiroshi Doyu wrote:
The disadvantage of this is that this limits the max
On Mon, Jun 02, 2014 at 11:41:04AM +0100, Dave Martin wrote:
On Fri, May 30, 2014 at 09:49:59PM +0200, Arnd Bergmann wrote:
On Friday 30 May 2014 14:31:55 Rob Herring wrote:
On Fri, May 30, 2014 at 2:06 PM, Arnd Bergmann a...@arndb.de wrote:
On Friday 30 May 2014 08:16:05 Rob Herring
On Wed, Jun 04, 2014 at 03:01:15PM +0100, Arnd Bergmann wrote:
On Wednesday 04 June 2014 14:56:01 Will Deacon wrote:
On Wed, Jun 04, 2014 at 02:44:03PM +0100, Thierry Reding wrote:
On Fri, May 30, 2014 at 09:54:37PM +0200, Arnd Bergmann wrote:
On Friday 30 May 2014 22:29:13 Hiroshi Doyu
On Wed, Jun 04, 2014 at 03:35:10PM +0100, Thierry Reding wrote:
On Mon, Jun 02, 2014 at 11:41:04AM +0100, Dave Martin wrote:
In the strictest sense, no.
But for a large set of sane configurations, this probably works.
Small sets of randomly-assigned IDs can just be enumerated one by
On Wed, Jun 04, 2014 at 05:41:32PM +0100, Will Deacon wrote:
On Wed, Jun 04, 2014 at 03:35:10PM +0100, Thierry Reding wrote:
On Mon, Jun 02, 2014 at 11:41:04AM +0100, Dave Martin wrote:
In the strictest sense, no.
But for a large set of sane configurations, this probably works.
On Fri, May 30, 2014 at 12:27:28PM +0100, Dave Martin wrote:
On Fri, May 30, 2014 at 08:30:08AM +0100, Thierry Reding wrote:
[...]
Arnd, can you take another look at this binding and see if there's
anything else missing? If not I'll go through the document again and
update all
On Fri, May 30, 2014 at 09:01:19PM +0200, Arnd Bergmann wrote:
On Friday 30 May 2014 12:22:32 Dave Martin wrote:
+
+Examples:
+=
+
+Single-master IOMMU:
+
+
+ iommu {
+ #address-cells = 0;
+ #size-cells = 0;
+ };
+
On Fri, May 30, 2014 at 09:01:19PM +0200, Arnd Bergmann wrote:
> On Friday 30 May 2014 12:22:32 Dave Martin wrote:
> > > +
> > > +Examples:
> > > +=
> > > +
> > > +Single-master IOMMU:
> > > +
> > > +
> > > + iommu {
> > > + #address-cells = <0>;
> > > +
On Fri, May 30, 2014 at 09:11:07PM +0200, Arnd Bergmann wrote:
> On Friday 30 May 2014 12:27:28 Dave Martin wrote:
> > On Fri, May 30, 2014 at 08:30:08AM +0100, Thierry Reding wrote:
> > > On Thu, May 29, 2014 at 09:52:22AM -0600, Stephen Warren wrote:
> > > > On 05/23/2014 02:36 PM, Thierry
On Fri, May 30, 2014 at 09:49:59PM +0200, Arnd Bergmann wrote:
> On Friday 30 May 2014 14:31:55 Rob Herring wrote:
> > On Fri, May 30, 2014 at 2:06 PM, Arnd Bergmann wrote:
> > > On Friday 30 May 2014 08:16:05 Rob Herring wrote:
> > >> On Fri, May 23, 2014 at 3:33 PM, Thierry Reding
> > >>
On Fri, May 30, 2014 at 09:49:59PM +0200, Arnd Bergmann wrote:
On Friday 30 May 2014 14:31:55 Rob Herring wrote:
On Fri, May 30, 2014 at 2:06 PM, Arnd Bergmann a...@arndb.de wrote:
On Friday 30 May 2014 08:16:05 Rob Herring wrote:
On Fri, May 23, 2014 at 3:33 PM, Thierry Reding
On Fri, May 30, 2014 at 09:11:07PM +0200, Arnd Bergmann wrote:
On Friday 30 May 2014 12:27:28 Dave Martin wrote:
On Fri, May 30, 2014 at 08:30:08AM +0100, Thierry Reding wrote:
On Thu, May 29, 2014 at 09:52:22AM -0600, Stephen Warren wrote:
On 05/23/2014 02:36 PM, Thierry Reding wrote:
On Fri, May 30, 2014 at 09:01:19PM +0200, Arnd Bergmann wrote:
On Friday 30 May 2014 12:22:32 Dave Martin wrote:
+
+Examples:
+=
+
+Single-master IOMMU:
+
+
+ iommu {
+ #address-cells = 0;
+ #size-cells = 0;
+ };
+
On Fri, May 30, 2014 at 08:54:37PM +0100, Arnd Bergmann wrote:
> On Friday 30 May 2014 22:29:13 Hiroshi Doyu wrote:
> > Tegra,SMMU has a similar problem and we have used a fixed size bitmap(64
> > bit) to afford 64 stream IDs so that a single device can hold multiple
> > IDs. If we apply the same
On Fri, May 30, 2014 at 08:54:37PM +0100, Arnd Bergmann wrote:
On Friday 30 May 2014 22:29:13 Hiroshi Doyu wrote:
Tegra,SMMU has a similar problem and we have used a fixed size bitmap(64
bit) to afford 64 stream IDs so that a single device can hold multiple
IDs. If we apply the same bitmap
On Friday 30 May 2014 22:29:13 Hiroshi Doyu wrote:
>
> IIUC the original problem, "a master with 8 streamIDs" means something
> like below, where some devices have multiple IDs but some have a
> single. A sinle #address-cells cannot afford those 2 masters at once.
>
>iommu {
>
On Friday 30 May 2014 14:31:55 Rob Herring wrote:
> On Fri, May 30, 2014 at 2:06 PM, Arnd Bergmann wrote:
> > On Friday 30 May 2014 08:16:05 Rob Herring wrote:
> >> On Fri, May 23, 2014 at 3:33 PM, Thierry Reding
> >> wrote:
> >> > From: Thierry Reding
> >> > +IOMMU master node:
> >> >
On Fri, May 30, 2014 at 2:06 PM, Arnd Bergmann wrote:
> On Friday 30 May 2014 08:16:05 Rob Herring wrote:
>> On Fri, May 23, 2014 at 3:33 PM, Thierry Reding
>> wrote:
>> > From: Thierry Reding
>> > +IOMMU master node:
>> > +==
>> > +
>> > +Devices that access memory through an
Arnd Bergmann writes:
>> > +Multiple-master IOMMU:
>> > +--
>> > +
>> > + iommu {
>> > + /* the specifier represents the ID of the master */
>> > + #address-cells = <1>;
>> > + #size-cells = <0>;
>> > + };
>> > +
>> > +
On Friday 30 May 2014 12:27:28 Dave Martin wrote:
> On Fri, May 30, 2014 at 08:30:08AM +0100, Thierry Reding wrote:
> > On Thu, May 29, 2014 at 09:52:22AM -0600, Stephen Warren wrote:
> > > On 05/23/2014 02:36 PM, Thierry Reding wrote:
> > > I think this is a mistake. address-cells/size-cells are
On Friday 30 May 2014 08:16:05 Rob Herring wrote:
> On Fri, May 23, 2014 at 3:33 PM, Thierry Reding
> wrote:
> > From: Thierry Reding
> > +IOMMU master node:
> > +==
> > +
> > +Devices that access memory through an IOMMU are called masters. A device
> > can
> > +have multiple
On Friday 30 May 2014 12:22:32 Dave Martin wrote:
> > +
> > +Examples:
> > +=
> > +
> > +Single-master IOMMU:
> > +
> > +
> > + iommu {
> > + #address-cells = <0>;
> > + #size-cells = <0>;
> > + };
> > +
> > + master {
> > + iommus =
On Fri, May 23, 2014 at 3:33 PM, Thierry Reding
wrote:
> From: Thierry Reding
>
> This commit introduces a generic device tree binding for IOMMU devices.
> Only a very minimal subset is described here, but it is enough to cover
> the requirements of both the Exynos System MMU and Tegra SMMU as
>
On Fri, May 30, 2014 at 08:30:08AM +0100, Thierry Reding wrote:
> On Thu, May 29, 2014 at 09:52:22AM -0600, Stephen Warren wrote:
> > On 05/23/2014 02:36 PM, Thierry Reding wrote:
> > > From: Thierry Reding
> > >
> > > This commit introduces a generic device tree binding for IOMMU devices.
> > >
On Fri, May 23, 2014 at 10:36:35PM +0200, Thierry Reding wrote:
> From: Thierry Reding
>
> This commit introduces a generic device tree binding for IOMMU devices.
> Only a very minimal subset is described here, but it is enough to cover
> the requirements of both the Exynos System MMU and Tegra
On Thu, May 29, 2014 at 09:52:22AM -0600, Stephen Warren wrote:
> On 05/23/2014 02:36 PM, Thierry Reding wrote:
> > From: Thierry Reding
> >
> > This commit introduces a generic device tree binding for IOMMU devices.
> > Only a very minimal subset is described here, but it is enough to cover
> >
On Thu, May 29, 2014 at 09:52:22AM -0600, Stephen Warren wrote:
On 05/23/2014 02:36 PM, Thierry Reding wrote:
From: Thierry Reding tred...@nvidia.com
This commit introduces a generic device tree binding for IOMMU devices.
Only a very minimal subset is described here, but it is enough to
On Fri, May 23, 2014 at 10:36:35PM +0200, Thierry Reding wrote:
From: Thierry Reding tred...@nvidia.com
This commit introduces a generic device tree binding for IOMMU devices.
Only a very minimal subset is described here, but it is enough to cover
the requirements of both the Exynos System
On Fri, May 30, 2014 at 08:30:08AM +0100, Thierry Reding wrote:
On Thu, May 29, 2014 at 09:52:22AM -0600, Stephen Warren wrote:
On 05/23/2014 02:36 PM, Thierry Reding wrote:
From: Thierry Reding tred...@nvidia.com
This commit introduces a generic device tree binding for IOMMU devices.
On Fri, May 23, 2014 at 3:33 PM, Thierry Reding
thierry.red...@gmail.com wrote:
From: Thierry Reding tred...@nvidia.com
This commit introduces a generic device tree binding for IOMMU devices.
Only a very minimal subset is described here, but it is enough to cover
the requirements of both the
On Friday 30 May 2014 12:22:32 Dave Martin wrote:
+
+Examples:
+=
+
+Single-master IOMMU:
+
+
+ iommu {
+ #address-cells = 0;
+ #size-cells = 0;
+ };
+
+ master {
+ iommus = /iommu;
+ };
+
On Friday 30 May 2014 08:16:05 Rob Herring wrote:
On Fri, May 23, 2014 at 3:33 PM, Thierry Reding
thierry.red...@gmail.com wrote:
From: Thierry Reding tred...@nvidia.com
+IOMMU master node:
+==
+
+Devices that access memory through an IOMMU are called masters. A device
On Friday 30 May 2014 12:27:28 Dave Martin wrote:
On Fri, May 30, 2014 at 08:30:08AM +0100, Thierry Reding wrote:
On Thu, May 29, 2014 at 09:52:22AM -0600, Stephen Warren wrote:
On 05/23/2014 02:36 PM, Thierry Reding wrote:
I think this is a mistake. address-cells/size-cells are for
Arnd Bergmann a...@arndb.de writes:
+Multiple-master IOMMU:
+--
+
+ iommu {
+ /* the specifier represents the ID of the master */
+ #address-cells = 1;
+ #size-cells = 0;
+ };
+
+ master {
+
On Fri, May 30, 2014 at 2:06 PM, Arnd Bergmann a...@arndb.de wrote:
On Friday 30 May 2014 08:16:05 Rob Herring wrote:
On Fri, May 23, 2014 at 3:33 PM, Thierry Reding
thierry.red...@gmail.com wrote:
From: Thierry Reding tred...@nvidia.com
+IOMMU master node:
+==
+
On Friday 30 May 2014 14:31:55 Rob Herring wrote:
On Fri, May 30, 2014 at 2:06 PM, Arnd Bergmann a...@arndb.de wrote:
On Friday 30 May 2014 08:16:05 Rob Herring wrote:
On Fri, May 23, 2014 at 3:33 PM, Thierry Reding
thierry.red...@gmail.com wrote:
From: Thierry Reding tred...@nvidia.com
On Friday 30 May 2014 22:29:13 Hiroshi Doyu wrote:
IIUC the original problem, a master with 8 streamIDs means something
like below, where some devices have multiple IDs but some have a
single. A sinle #address-cells cannot afford those 2 masters at once.
iommu {
/*
On 05/23/2014 02:36 PM, Thierry Reding wrote:
> From: Thierry Reding
>
> This commit introduces a generic device tree binding for IOMMU devices.
> Only a very minimal subset is described here, but it is enough to cover
> the requirements of both the Exynos System MMU and Tegra SMMU as
>
On 05/23/2014 02:36 PM, Thierry Reding wrote:
From: Thierry Reding tred...@nvidia.com
This commit introduces a generic device tree binding for IOMMU devices.
Only a very minimal subset is described here, but it is enough to cover
the requirements of both the Exynos System MMU and Tegra SMMU
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