On Thu, 10 Sep 2020 at 14:33, Tom Murphy wrote:
>
> On Wed, 9 Sep 2020 at 13:56, Tvrtko Ursulin
> wrote:
> >
> >
> > On 09/09/2020 10:16, Tvrtko Ursulin wrote:
> > > On 08/09/2020 23:43, Tom Murphy wrote:
> > >> On Tue, 8 Sep 2020 at 16:56, Tvrtko
On Wed, 9 Sep 2020 at 13:56, Tvrtko Ursulin
wrote:
>
>
> On 09/09/2020 10:16, Tvrtko Ursulin wrote:
> > On 08/09/2020 23:43, Tom Murphy wrote:
> >> On Tue, 8 Sep 2020 at 16:56, Tvrtko Ursulin
> >> wrote:
> >>> On 08/09/2020 16:44, Logan Gunthorpe
On Tue, 8 Sep 2020 at 16:56, Tvrtko Ursulin
wrote:
>
>
> On 08/09/2020 16:44, Logan Gunthorpe wrote:
> > On 2020-09-08 9:28 a.m., Tvrtko Ursulin wrote:
> >>>
> >>> diff --git a/drivers/gpu/drm/i915/i915_scatterlist.h
> >>> b/drivers/gpu/drm/i915/i915
> >>> index b7b59328cb76..9367ac801f0c 100644
On Fri, 28 Aug 2020 at 00:34, Tom Murphy wrote:
>
> On Thu, 27 Aug 2020 at 22:36, Logan Gunthorpe wrote:
> >
> >
> >
> > On 2020-08-23 6:04 p.m., Tom Murphy wrote:
> > > I have added a check for the sg_dma_len == 0 :
> > > "&qu
On Thu, 27 Aug 2020 at 22:36, Logan Gunthorpe wrote:
>
>
>
> On 2020-08-23 6:04 p.m., Tom Murphy wrote:
> > I have added a check for the sg_dma_len == 0 :
> > """
> > } __sgt_iter(struct scatterlist *sgl, bool dma) {
> > struct s
That would be great!
On Wed., Aug. 26, 2020, 2:14 p.m. Robin Murphy,
wrote:
> Hi Tom,
>
> On 2019-12-21 15:03, Tom Murphy wrote:
> > This patchset converts the intel iommu driver to the dma-iommu api.
> >
> > While converting the driver I exposed a bug in the intel
Hi Logan/All,
I have added a check for the sg_dma_len == 0 :
"""
} __sgt_iter(struct scatterlist *sgl, bool dma) {
struct sgt_iter s = { .sgp = sgl };
+ if (sgl && sg_dma_len(sgl) == 0)
+ s.sgp = NULL;
if (s.sgp) {
.
"""
at location [1].
but it
On Tue, 18 Aug 2020 at 16:17, Robin Murphy wrote:
>
> On 2020-08-18 07:04, Tom Murphy wrote:
> > Add a flush_iotlb_range to allow flushing of an iova range instead of a
> > full flush in the dma-iommu path.
> >
> > Allow the iommu_unmap_fast to return newly freed
init_iova_flush_queue can fail if we run out of memory. Fall back to no
flush queue if it fails.
Signed-off-by: Tom Murphy
---
drivers/iommu/dma-iommu.c | 8 +---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index
the intel iommu
driver) which need to wait for the ioTLB to be flushed before newly
free/unmapped page table pages can be freed. This way we can still batch
ioTLB free operations and handle the freelists.
Change-log:
V2:
-fix missing parameter in mtk_iommu_v1.c
Signed-off-by: Tom Murphy
---
drivers
init_iova_flush_queue can fail if we run out of memory. Fall back to no
flush queue if it fails.
Signed-off-by: Tom Murphy
---
drivers/iommu/dma-iommu.c | 8 +---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index
the intel iommu
driver) which need to wait for the ioTLB to be flushed before newly
free/unmapped page table pages can be freed. This way we can still batch
ioTLB free operations and handle the freelists.
Signed-off-by: Tom Murphy
---
drivers/iommu/amd/iommu.c | 14 -
drivers/iommu/arm-smmu
>Btw, what is the current state of converting intel-iommu to the dma-iommu
These changes expose a bug in the i915 intel driver which hasn't been
fixed yet. I don't think anyone is actively working on it but I plan
on merging as many patches as I can so it's easier to do the
intel-iommu ->
Could we merge patch 1-3 from this series? it just cleans up weird
code and merging these patches will cover some of the work needed to
move the intel iommu driver to the dma-iommu api in the future.
On Sat, 21 Dec 2019 at 07:04, Tom Murphy wrote:
>
> Remove all IOVA handling code from t
Any news on this? Is there anyone who wants to try and fix this possible bug?
On Mon, 23 Dec 2019 at 03:41, Jani Nikula wrote:
>
> On Mon, 23 Dec 2019, Robin Murphy wrote:
> > On 2019-12-23 10:37 am, Jani Nikula wrote:
> >> On Sat, 21 Dec 2019, Tom Murphy wrote:
> &g
Allow the dma-iommu api to use bounce buffers for untrusted devices.
This is a copy of the intel bounce buffer code.
Signed-off-by: Tom Murphy
---
drivers/iommu/dma-iommu.c | 93 ---
drivers/iommu/iommu.c | 10 +
include/linux/iommu.h | 9 +++-
3
Convert the intel iommu driver to the dma-iommu api. Remove the iova
handling and reserve region code from the intel iommu driver.
Signed-off-by: Tom Murphy
---
drivers/iommu/Kconfig | 1 +
drivers/iommu/intel-iommu.c | 742 +++-
include/linux/intel
of type IOMMU_DOMAIN_IDENTITY from the begging rather than
needlessly swapping domains.
Signed-off-by: Tom Murphy
---
drivers/iommu/intel-iommu.c | 88 +
1 file changed, 31 insertions(+), 57 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu
at the moment and I want to get these
changes out before the iommu code changes any more.
Tom Murphy (8):
iommu/vt-d: clean up 32bit si_domain assignment
iommu/vt-d: Use default dma_direct_* mapping functions for direct
mapped devices
iommu/vt-d: Remove IOVA handling code from non-dma_ops
the returned value specifying the number of elements in the list
and instead depends on the previous behaviour of the intel iommu driver
which would return the same number of elements in the output list as in
the input list.
Signed-off-by: Tom Murphy
---
drivers/iommu/dma-iommu.c | 38
.
Signed-off-by: Tom Murphy
---
drivers/iommu/intel-iommu.c | 52 +
1 file changed, 6 insertions(+), 46 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index c1ea66467918..64b1a9793daa 100644
--- a/drivers/iommu/intel-iommu.c
to dma-iommu ops
Add a iommu_dma_free_cpu_cached_iovas function to allow drivers which
use the dma-iommu ops to free cached cpu iovas.
Signed-off-by: Tom Murphy
---
drivers/iommu/dma-iommu.c | 9 +
include/linux/dma-iommu.h | 3 +++
2 files changed, 12 insertions(+)
diff --git
be freed. This way we can still batch
ioTLB free operations and handle the freelists.
Signed-off-by: Tom Murphy
---
drivers/iommu/amd_iommu.c | 14 -
drivers/iommu/arm-smmu-v3.c | 3 +-
drivers/iommu/arm-smmu.c| 3 +-
drivers/iommu/dma-iommu.c | 45
ic in it's
iommu_ops::map function. But doing this wastes the memory allocators
atomic pools.
Signed-off-by: Tom Murphy
Reviewed-by: Robin Murphy
Reviewed-by: Christoph Hellwig
---
drivers/iommu/amd_iommu.c | 3 ++-
drivers/iommu/arm-smmu-v3.c| 2 +-
drivers/iommu/arm-smmu.c | 2 +
middle pages using "cmpxchg64()".
Signed-off-by: Tom Murphy
---
drivers/iommu/amd_iommu.c | 10 +-
drivers/iommu/amd_iommu_types.h | 1 -
2 files changed, 1 insertion(+), 10 deletions(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 00
Convert the AMD iommu driver to the dma-iommu api. Remove the iova
handling and reserve region code from the AMD iommu driver.
Signed-off-by: Tom Murphy
---
drivers/iommu/Kconfig | 1 +
drivers/iommu/amd_iommu.c | 677 --
2 files changed, 68 insertions
Use the dev->coherent_dma_mask when allocating in the dma-iommu ops api.
Signed-off-by: Tom Murphy
Reviewed-by: Robin Murphy
Reviewed-by: Christoph Hellwig
---
drivers/iommu/dma-iommu.c | 12 +++-
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/iommu/dma-iomm
Handle devices which defer their attach to the iommu in the dma-iommu api
Signed-off-by: Tom Murphy
Reviewed-by: Robin Murphy
---
drivers/iommu/dma-iommu.c | 27 ++-
1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu
ops.3
-Add a gfp_t parameter to the iommu_ops::map function.
-Made use of the reserve region code inside the dma-iommu api
Tom Murphy (5):
iommu/amd: Remove unnecessary locking from AMD iommu driver
iommu: Add gfp parameter to iommu_ops::map
iommu/dma-iommu: Handle deferred devices
iommu/dma-
20 Aug 2019 at 10:41, Christoph Hellwig wrote:
>
> On Thu, Aug 15, 2019 at 12:09:39PM +0100, Tom Murphy wrote:
> > We can remove the mutex lock from amd_iommu_map and amd_iommu_unmap.
> > iommu_map doesn’t lock while mapping and so no two calls should touch
> > the sam
, 13 Aug 2019 at 14:07, Christoph Hellwig wrote:
>
> On Tue, Aug 13, 2019 at 08:09:26PM +0800, Tom Murphy wrote:
> > Hi Christoph,
> >
> > I quit my job and am having a great time traveling South East Asia.
>
> Enjoy! I just returned from my vacation.
>
> >
Convert the AMD iommu driver to the dma-iommu api. Remove the iova
handling and reserve region code from the AMD iommu driver.
Signed-off-by: Tom Murphy
---
drivers/iommu/Kconfig | 1 +
drivers/iommu/amd_iommu.c | 677 --
2 files changed, 68 insertions
Use the dev->coherent_dma_mask when allocating in the dma-iommu ops api.
Signed-off-by: Tom Murphy
---
drivers/iommu/dma-iommu.c | 12 +++-
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 906b7fa14
Handle devices which defer their attach to the iommu in the dma-iommu api
Signed-off-by: Tom Murphy
---
drivers/iommu/dma-iommu.c | 27 ++-
1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index
ic in it's
iommu_ops::map function. But doing this wastes the memory allocators
atomic pools.
Signed-off-by: Tom Murphy
---
drivers/iommu/amd_iommu.c | 3 ++-
drivers/iommu/arm-smmu-v3.c| 2 +-
drivers/iommu/arm-smmu.c | 2 +-
drivers/iommu/dma-iommu.c | 6 ++---
drivers/io
We can remove the mutex lock from amd_iommu_map and amd_iommu_unmap.
iommu_map doesn’t lock while mapping and so no two calls should touch
the same iova range. The AMD driver already handles the page table page
allocations without locks so we can safely remove the locks.
Signed-off-by: Tom Murphy
/users/hch/misc.git/shortlog/refs/heads/dma-iommu-ops.3
-Add a gfp_t parameter to the iommu_ops::map function.
-Made use of the reserve region code inside the dma-iommu api
Tom Murphy (5):
iommu/amd: Remove unnecessary locking from AMD iommu driver
iommu: Add gfp parameter to iommu_ops::map
Hi Christoph,
I quit my job and am having a great time traveling South East Asia.
I definitely don't want this work to go to waste and I hope to repost it
later this week but I can't guarantee it.
Let me know if you need this urgently.
Thanks,
Tom
On Sat 10 Aug 2019, 3:20 p.m. Christoph
Handle devices which defer their attach to the iommu in the dma-iommu api
Signed-off-by: Tom Murphy
---
drivers/iommu/dma-iommu.c | 27 ++-
1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index
ic in it's
iommu_ops::map function. But doing this wastes the memory allocators
atomic pools.
Signed-off-by: Tom Murphy
---
drivers/iommu/amd_iommu.c | 3 ++-
drivers/iommu/arm-smmu-v3.c| 2 +-
drivers/iommu/arm-smmu.c | 2 +-
drivers/iommu/dma-iommu.c | 6 ++---
drivers/io
Convert the AMD iommu driver to the dma-iommu api. Remove the iova
handling and reserve region code from the AMD iommu driver.
Signed-off-by: Tom Murphy
---
drivers/iommu/Kconfig | 1 +
drivers/iommu/amd_iommu.c | 677 --
2 files changed, 68 insertions
Use the dev->coherent_dma_mask when allocating in the dma-iommu ops api.
Signed-off-by: Tom Murphy
---
drivers/iommu/dma-iommu.c | 14 --
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index f303bbe20
We can remove the mutex lock from amd_iommu_map and amd_iommu_unmap.
iommu_map doesn’t lock while mapping and so no two calls should touch
the same iova range. The AMD driver already handles the page table page
allocations without locks so we can safely remove the locks.
Signed-off-by: Tom Murphy
/heads/dma-iommu-ops.3
-Add a gfp_t parameter to the iommu_ops::map function.
-Made use of the reserve region code inside the dma-iommu api
Tom Murphy (5):
iommu/amd: Remove unnecessary locking from AMD iommu driver
iommu: Add gfp parameter to iommu_ops::map
iommu/dma-iommu: Handle deferr
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