diff options
| author | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2024-04-18 13:33:54 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-04-26 13:16:01 +0300 |
| commit | 61928bab9d26b147d41d9b9a4d2328d0e1d6c0c0 (patch) | |
| tree | 103ce7996ce5884e63d1bd6c259a93a9aa57b9b6 /drivers/iommu/amd/amd_iommu.h | |
| parent | 25efbb055863079bbd47b32fc6d3c4a6f082daf1 (diff) | |
| download | linux-61928bab9d26b147d41d9b9a4d2328d0e1d6c0c0.tar.xz | |
iommu/amd: Define per-IOMMU iopf_queue
AMD IOMMU hardware supports PCI Peripheral Paging Request (PPR) using
a PPR log, which is a circular buffer containing requests from downstream
end-point devices.
There is one PPR log per IOMMU instance. Therefore, allocate an iopf_queue
per IOMMU instance during driver initialization, and free the queue during
driver deinitialization.
Also rename enable_iommus_v2() -> enable_iommus_ppr() to reflect its
usage. And add amd_iommu_gt_ppr_supported() check before enabling PPR
log.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Co-developed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20240418103400.6229-10-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd/amd_iommu.h')
| -rw-r--r-- | drivers/iommu/amd/amd_iommu.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/iommu/amd/amd_iommu.h b/drivers/iommu/amd/amd_iommu.h index f8919c54d9ae..66bf20d4a91a 100644 --- a/drivers/iommu/amd/amd_iommu.h +++ b/drivers/iommu/amd/amd_iommu.h @@ -46,6 +46,10 @@ extern int amd_iommu_gpt_level; bool amd_iommu_pasid_supported(void); +/* IOPF */ +int amd_iommu_iopf_init(struct amd_iommu *iommu); +void amd_iommu_iopf_uninit(struct amd_iommu *iommu); + /* GCR3 setup */ int amd_iommu_set_gcr3(struct iommu_dev_data *dev_data, ioasid_t pasid, unsigned long gcr3); |