[RFC,20/30] iommu/arm-smmu-v3: Enable PCI PASID in masters

Sinan Kaya
2017-05-31T14:10:07Z

Hi Jean-Philippe,

On 2/27/2017 2:54 PM, Jean-Philippe Brucker wrote:
> Enable PASID for PCI devices that support it.
>
> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
> ---
> drivers/iommu/arm-smmu-v3.c | 66 ++++++++++++++++++++++++++++++++++++++++++---
> 1 file changed, 63 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
> index 499dc1cd07eb..37fd061405e9 100644
> --- a/drivers/iommu/arm-smmu-v3.c
> +++ b/drivers/iommu/arm-smmu-v3.c
> @@ -730,6 +730,8 @@ struct arm_smmu_master_data {
>
> struct arm_smmu_stream *streams;
> struct rb_root contexts;
> +
> + u32 avail_contexts;
> };
>

I know that you are doing some code restructuring. As I was looking at the amdkfd
driver, I realized that there is quite a bit of PASID, ATS and PRI work here that
can be plumbed into the framework you are building.

https://github.com/torvalds/linux/tree/master/drivers/gpu/drm/amd/amdkfd

I wanted to share this with if you were aware of this or not. Functions of interest
are:

amd_iommu_init_device
amd_iommu_free_device
amd_iommu_bind_pasid
amd_iommu_set_invalid_ppr_cb
amd_iommu_unbind_pasid
amd_iommu_device_info

Sinan

--
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.