On Wed, 2012-04-18 at 21:55 +1000, David Gibson wrote:
> On Mon, Apr 02, 2012 at 03:14:46PM -0600, Alex Williamson wrote:
> > IOMMU groups define the minimum granularity of the IOMMU. We therefore
> > create groups using a dma_dev which is the effective requestor ID for
> > the entire group. Addi
On Wed, 2012-04-18 at 19:58 +1000, David Gibson wrote:
> On Mon, Apr 02, 2012 at 03:14:40PM -0600, Alex Williamson wrote:
> > IOMMUs often do not have visibility of individual devices in the
> > system. Due to IOMMU design, bus topology, or device quirks, we
> > can often only identify groups of d
* Stephen Warren wrote:
> On 04/18/2012 04:19 AM, Hiroshi Doyu wrote:
>
> > Subject: [PATCH 1/1] dt: Add general DMA window parser
> >
> > This code was stolen from:
> > "arch/microblaze/kernel/prom_parse.c"
> > "arch/powerpc/kernel/prom_parse.c"
> >
> > Once "ibm," prefix is removed fro
Hi Joerg,
On 12 April 2012 05:25, Joerg Roedel wrote:
> Doesn't apply against 3.4-rc2. Please rebase and send a new version.
I rebased the patch and sent v2.
Thanks,
Omar
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'domain_destroy with devices attached' case isn't yet handled, instead
code assumes that the device was already detached.
If the domain is destroyed the hardware still has access to invalid
pointers to its page table and internal iommu object. In order to
detach the users we need to track devices
On 04/17/2012 11:10 PM, Hiroshi Doyu wrote:
> On Mon, 16 Apr 2012 18:07:06 +0200
> Stephen Warren wrote:
>
>> On 04/16/2012 04:10 AM, Hiroshi Doyu wrote:
>>> Stephen Warren wrote at Fri, 13 Apr 2012 21:33:47 +0200:
On 04/13/2012 04:22 AM, Hiroshi Doyu wrote:
> Add device tree support for
On 04/18/2012 04:19 AM, Hiroshi Doyu wrote:
> Subject: [PATCH 1/1] dt: Add general DMA window parser
>
> This code was stolen from:
> "arch/microblaze/kernel/prom_parse.c"
> "arch/powerpc/kernel/prom_parse.c"
>
> Once "ibm," prefix is removed from dts file. This generic one could
> r
This patch modifies dma-mapping implementation on ARM architecture to
use common dma_map_ops structure and asm-generic/dma-mapping-common.h
helpers.
Signed-off-by: Marek Szyprowski
Acked-by: Kyungmin Park
Tested-By: Subash Patel
---
arch/arm/Kconfig |1 +
arch/arm/include
This patch converts all dma_sg methods to be generic (independent of the
current DMA mapping implementation for ARM architecture). All dma sg
operations are now implemented on top of respective
dma_map_page/dma_sync_single_for* operations from dma_map_ops structure.
Before this patch there were cu
This patch removes the need for the offset parameter in dma bounce
functions. This is required to let dma-mapping framework on ARM
architecture to use common, generic dma_map_ops based dma-mapping
helpers.
Background and more detailed explaination:
dma_*_range_* functions are available from the e
Replace all uses of ~0 with DMA_ERROR_CODE, what should make the code
easier to read.
Signed-off-by: Marek Szyprowski
Acked-by: Kyungmin Park
Tested-By: Subash Patel
---
arch/arm/common/dmabounce.c|6 +++---
arch/arm/include/asm/dma-mapping.h |4 +++-
arch/arm/mm/dma-mapping.c
Add a common helper for dma-mapping core for mapping a coherent buffer
to userspace.
Reported-by: Subash Patel
Signed-off-by: Marek Szyprowski
Acked-by: Kyungmin Park
Tested-By: Subash Patel
---
drivers/base/dma-coherent.c| 42
include/asm-generi
This patch removes dma bounce hooks from the common dma mapping
implementation on ARM architecture and creates a separate set of
dma_map_ops for dma bounce devices.
Signed-off-by: Marek Szyprowski
Acked-by: Kyungmin Park
Tested-By: Subash Patel
---
arch/arm/common/dmabounce.c| 62 +++
This patch add a complete implementation of DMA-mapping API for
devices which have IOMMU support.
This implementation tries to optimize dma address space usage by remapping
all possible physical memory chunks into a single dma address space chunk.
DMA address space is managed on top of the bitmap
This patch converts dma_alloc/free/mmap_{coherent,writecombine}
functions to use generic alloc/free/mmap methods from dma_map_ops
structure. A new DMA_ATTR_WRITE_COMBINE DMA attribute have been
introduced to implement writecombine methods.
Signed-off-by: Marek Szyprowski
Acked-by: Kyungmin Park
Hello,
This is a quick update on dma-mapping redesign patches for ARM. I did
some minor fixes suggested by Arnd and extended commit messages for a
few patches. Like the previous version, the patches have been rebased
onto latest Linux v3.4-rc3 which comes with dma_map_ops related
preparation chan
This patch just performs a global cleanup in DMA mapping implementation
for ARM architecture. Some of the tiny helper functions have been moved
to the caller code, some have been merged together.
Signed-off-by: Marek Szyprowski
Acked-by: Kyungmin Park
Acked-by: Arnd Bergmann
Tested-By: Subash P
Replace all calls to printk with pr_* functions family.
Signed-off-by: Marek Szyprowski
Acked-by: Kyungmin Park
Acked-by: Arnd Bergmann
Tested-By: Subash Patel
---
arch/arm/mm/dma-mapping.c | 16
1 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/arm/mm/dma
On Mon, Apr 02, 2012 at 03:14:46PM -0600, Alex Williamson wrote:
> IOMMU groups define the minimum granularity of the IOMMU. We therefore
> create groups using a dma_dev which is the effective requestor ID for
> the entire group. Additional devices can be added to groups based on
> system topolog
On Mon, Apr 02, 2012 at 03:14:40PM -0600, Alex Williamson wrote:
> IOMMUs often do not have visibility of individual devices in the
> system. Due to IOMMU design, bus topology, or device quirks, we
> can often only identify groups of devices. Examples include
> Intel VT-d & AMD-Vi which often hav
From: Thierry Reding
Subject: Re: [PATCH 1/1] dt: Add general DMA window parser
Date: Wed, 18 Apr 2012 12:54:23 +0200
Message-ID: <20120418105423.ga5...@avionic-0098.mockup.avionic-design.de>
> * PGP Signed by an unknown key
>
> * Hiroshi Doyu wrote:
> > diff --git a/drivers/of/of_dma.c b/driver
* Hiroshi Doyu wrote:
> diff --git a/drivers/of/of_dma.c b/drivers/of/of_dma.c
> new file mode 100644
> index 000..45c9e88
> --- /dev/null
> +++ b/drivers/of/of_dma.c
> @@ -0,0 +1,35 @@
> +/*
> + * Stolen from:
> + * "arch/microblaze/kernel/prom_parse.c"
> + * "arch/powerpc/kernel/prom_pars
From: Thierry Reding
Subject: Re: [PATCH 1/1] dt: Add general DMA window parser
Date: Wed, 18 Apr 2012 12:26:29 +0200
Message-ID: <20120418102629.ga14...@avionic-0098.mockup.avionic-design.de>
> * PGP Signed by an unknown key
>
> * Hiroshi Doyu wrote:
> > + cells = prop ? *(__be32 *)prop : of_
* Hiroshi Doyu wrote:
> + cells = prop ? *(__be32 *)prop : of_n_addr_cells(dn);
I think this needs to be:
cells = prop ? be32_to_cpup(prop) : of_n_addr_cells(dn);
Only casting isn't enough, you need the bytes to be swapped.
> + cells = prop ? *(__be32 *)prop : of_n_size_cells(dn
Hi,
Try again with fixing Thierry's commnets, Thanks.
>From 9a632c24949e46df197a216ca95f684edd1db693 Mon Sep 17 00:00:00 2001
From: Hiroshi DOYU
Date: Wed, 18 Apr 2012 12:09:03 +0300
Subject: [PATCH 1/1] dt: Add general DMA window parser
This code was stolen from:
"arch/microblaze/kerne
* Hiroshi Doyu wrote:
> diff --git a/drivers/of/of_dma.c b/drivers/of/of_dma.c
> new file mode 100644
> index 000..1db1ccd
> --- /dev/null
> +++ b/drivers/of/of_dma.c
> @@ -0,0 +1,35 @@
> +/*
> + * Stealed from:
"Stolen from"
> + * "arch/microblaze/kernel/prom_parse.c"
> + * "arch/powerpc
From: Arnd Bergmann
Subject: Re: [PATCH 1/1] arm/dts: Tegra30: Add device tree support for SMMU
Date: Wed, 18 Apr 2012 09:31:53 +0200
Message-ID: <201204180731.54064.a...@arndb.de>
> On Wednesday 18 April 2012, Hiroshi Doyu wrote:
> > If we can consider IOMMU as one of the implementation of DMA(D
On Wednesday 18 April 2012, Hiroshi Doyu wrote:
> If we can consider IOMMU as one of the implementation of DMA(Direct
> Memory Access), the prefix "dma-(window)" may make sense here. Then,
> we don't have to introduce a new concept "IO virtual address(iova)" in
> addition to the existing "bus addre
Hello Marek,
I have tested below patch series for vanilla 3.4-rc2 (without videobuf2
support for dmabuf patches) with and without IOMMU support on origen
board. These patches are good now. You can add:
Tested-By: Subash Patel for whole series.
Regards,
Subash
On 04/10/2012 04:34 PM, Marek
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