mbox series

[v3,0/9] Add PCI ATS support to Arm SMMUv3

Message ID 20190417182448.12382-1-jean-philippe.brucker@arm.com (mailing list archive)
Headers show
Series Add PCI ATS support to Arm SMMUv3 | expand

Message

Jean-Philippe Brucker April 17, 2019, 6:24 p.m. UTC 
This series enables PCI ATS in SMMUv3. Changes since v2 [1]:

* Fix build failure when building arm-smmu-v3 without CONFIG_PCI
  Patches 1 and 2 are new.

* Only enable ATS if the root complex supports it. For the moment, only
  IORT provides this information. I have patches for devicetree but
  they are less mature and I'd rather make it a separate series.

* Tried to address most comments. I'll see if I can improve the firmware
  code when adding devicetree support (see [2]).

Note that there is a small conflict with the SVA API. This series
applies on top of Joerg's api-features branch for v5.2.

[1] https://www.spinics.net/lists/arm-kernel/msg719722.html
[2] git://linux-arm.org/linux-jpb.git ats/current

Jean-Philippe Brucker (9):
  PCI: Move ATS declarations outside of CONFIG_PCI
  PCI: Add a stub for pci_ats_disabled()
  ACPI/IORT: Check ATS capability in root complex nodes
  iommu/arm-smmu-v3: Rename arm_smmu_master_data to arm_smmu_master
  iommu/arm-smmu-v3: Store SteamIDs in master
  iommu/arm-smmu-v3: Add a master->domain pointer
  iommu/arm-smmu-v3: Link domains and devices
  iommu/arm-smmu-v3: Add support for PCI ATS
  iommu/arm-smmu-v3: Disable tagged pointers

 drivers/acpi/arm64/iort.c   |  11 ++
 drivers/iommu/arm-smmu-v3.c | 345 ++++++++++++++++++++++++++++--------
 include/linux/iommu.h       |   4 +
 include/linux/pci.h         |  31 ++--
 4 files changed, 306 insertions(+), 85 deletions(-)

Comments

Will Deacon April 23, 2019, 11:21 a.m. UTC | #1 
On Wed, Apr 17, 2019 at 07:24:39PM +0100, Jean-Philippe Brucker wrote:
> This series enables PCI ATS in SMMUv3. Changes since v2 [1]:
> 
> * Fix build failure when building arm-smmu-v3 without CONFIG_PCI
>   Patches 1 and 2 are new.
> 
> * Only enable ATS if the root complex supports it. For the moment, only
>   IORT provides this information. I have patches for devicetree but
>   they are less mature and I'd rather make it a separate series.
> 
> * Tried to address most comments. I'll see if I can improve the firmware
>   code when adding devicetree support (see [2]).
> 
> Note that there is a small conflict with the SVA API. This series
> applies on top of Joerg's api-features branch for v5.2.

I'll pick this up via the SMMU queue, since the conflict with api-features
is trivial to resolve.

Will