Hi Robin, Will,
On Wed, Nov 04, 2015 at 03:31:55PM +, Robin Murphy wrote:
>On 04/11/15 14:43, Will Deacon wrote:
>>On Wed, Nov 04, 2015 at 09:44:40PM +0800, Peng Fan wrote:
>>>Hi Will,
>>
>>Hello,
>>
>>>I am trying to enable SMMU(mmu500) on an platform.
>>>My platform support only 32 SIDs, but
On Wed, 2015-11-04 at 12:24 -0500, Laine Stump wrote:
> Last week I upgraded my Fedora 22 AMD 990FX system from kernel 4.1.10 to
> 4.2.3 (standard Fedora builds) and multiple devices stopped working:
>
> * 00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00
> Azalia (Intel HDA) (r
There is really no way to safely give a user full access to a DMA
capable device without an IOMMU to protect the host system. There is
also no way to provide DMA translation, for use cases such as device
assignment to virtual machines. However, there are still those users
that want userspace driv
On 11/04/2015 05:11 AM, Robin Murphy wrote:
On 04/11/15 08:39, Yong Wu wrote:
On Thu, 2015-10-01 at 20:13 +0100, Robin Murphy wrote:
Taking some inspiration from the arch/arm code, implement the
arch-specific side of the DMA mapping ops using the new IOMMU-DMA layer.
[...]
+static void *__iom
Last week I upgraded my Fedora 22 AMD 990FX system from kernel 4.1.10 to
4.2.3 (standard Fedora builds) and multiple devices stopped working:
* 00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00
Azalia (Intel HDA) (rev 40)
* 02:00.[01] Ethernet controller: Intel Corporation 82
On 04/11/15 14:43, Will Deacon wrote:
On Wed, Nov 04, 2015 at 09:44:40PM +0800, Peng Fan wrote:
Hi Will,
Hello,
I am trying to enable SMMU(mmu500) on an platform.
My platform support only 32 SIDs, but it have more than 100 masters.
Do you mean the MMU-500 configuration really only has 5 bi
iommu_group_alloc will initialize the reference count for group to 1.
iommu_group_add_device also increase the group reference count,
if nothing bad happends. And we need to add iommu_group_put to
decrease the reference count for group.
Signed-off-by: Peng Fan
Cc: Will Deacon
Cc: Joerg Roedel
-
Hi Will,
I am trying to enable SMMU(mmu500) on an platform.
My platform support only 32 SIDs, but it have more than 100 masters.
So I need to let different masters share one SID. I read current
arm-smmu.c, but it needs each master has unique SID. Do you have
some suggestions about how to let diffe
On Wed, Nov 04, 2015 at 09:44:40PM +0800, Peng Fan wrote:
> Hi Will,
Hello,
> I am trying to enable SMMU(mmu500) on an platform.
> My platform support only 32 SIDs, but it have more than 100 masters.
> So I need to let different masters share one SID. I read current
> arm-smmu.c, but it needs eac
On 04/11/15 08:39, Yong Wu wrote:
On Thu, 2015-10-01 at 20:13 +0100, Robin Murphy wrote:
Taking some inspiration from the arch/arm code, implement the
arch-specific side of the DMA mapping ops using the new IOMMU-DMA layer.
[...]
+static void *__iommu_alloc_attrs(struct device *dev, size_t siz
On Wed, Nov 04, 2015 at 06:48:50PM +0900, Tomasz Figa wrote:
> There is no requirement, but shouldn't it be desired for the mapping
> code to map them as such? Otherwise, how could the IOMMU use case you
> described above (address translator for devices which don't have the
> capability to address
Hi David,
We hit the warning during test:
Oct 19 15:23:20 storage9-qa kernel: [ 638.139722] [ cut
here ]
Oct 19 15:23:20 storage9-qa kernel: [ 638.139730] WARNING: CPU: 5
PID: 1281 at kernel/watchdog.c:290
watchdog_overflow_callback+0x98/0xc0()
Oct 19 15:23:20 storage9-q
On Wed, Nov 4, 2015 at 6:27 PM, Russell King - ARM Linux
wrote:
> On Wed, Nov 04, 2015 at 02:12:03PM +0900, Tomasz Figa wrote:
>> My understanding of a scatterlist was that it represents a buffer as a
>> whole, by joining together its physically discontinuous segments.
>
> Correct, and it may also
On Wed, Nov 04, 2015 at 02:12:03PM +0900, Tomasz Figa wrote:
> My understanding of a scatterlist was that it represents a buffer as a
> whole, by joining together its physically discontinuous segments.
Correct, and it may also be scattered in CPU virtual space as well.
> I don't see how single se
On Wed, Nov 04, 2015 at 02:15:41PM +0900, Tomasz Figa wrote:
> On Wed, Nov 4, 2015 at 3:40 AM, Russell King - ARM Linux
> wrote:
> > On Tue, Nov 03, 2015 at 05:41:24PM +, Robin Murphy wrote:
> >> Hi Tomasz,
> >>
> >> On 02/11/15 13:43, Tomasz Figa wrote:
> >> >Agreed. The dma_map_*() API is no
On Thu, 2015-10-01 at 20:13 +0100, Robin Murphy wrote:
> Taking some inspiration from the arch/arm code, implement the
> arch-specific side of the DMA mapping ops using the new IOMMU-DMA layer.
[...]
> +static void *__iommu_alloc_attrs(struct device *dev, size_t size,
> +
16 matches
Mail list logo
