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| author | Vasant Hegde <vasant.hegde@amd.com> | 2023-06-28 08:16:23 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-07-14 17:19:36 +0300 |
| commit | 386ae59bd7db4eafc74bdfdcf60182c2171aea2a (patch) | |
| tree | a168fef9d373e4e5b9e836f8f0a00f97bc2373ec /drivers/iommu/amd/amd_iommu_types.h | |
| parent | d269ab61f4f8c56999fd26ade86def26db1fed09 (diff) | |
| download | linux-386ae59bd7db4eafc74bdfdcf60182c2171aea2a.tar.xz | |
iommu/amd: Generalize log overflow handling
Each IOMMU has three log buffers (Event, GA and PPR log). Once a buffer
becomes full, IOMMU generates an interrupt with the corresponding overflow
status bit, and stop processing the log. To handle an overflow, the IOMMU
driver needs to disable the log, clear the overflow status bit, and
re-enable the log. This procedure is same among all types of log
buffer except it uses different overflow status bit and enabling bit.
Hence, to consolidate the log buffer restarting logic, introduce a helper
function amd_iommu_restart_log(), which caller can specify parameters
specific for each type of log buffer.
Also rename MMIO_STATUS_EVT_OVERFLOW_INT_MASK as
MMIO_STATUS_EVT_OVERFLOW_MASK.
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Link: https://lore.kernel.org/r/20230628051624.5792-2-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd/amd_iommu_types.h')
| -rw-r--r-- | drivers/iommu/amd/amd_iommu_types.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h index dc1db6167927..7c436ba2a0a2 100644 --- a/drivers/iommu/amd/amd_iommu_types.h +++ b/drivers/iommu/amd/amd_iommu_types.h @@ -120,9 +120,10 @@ #define PASID_MASK 0x0000ffff /* MMIO status bits */ -#define MMIO_STATUS_EVT_OVERFLOW_INT_MASK BIT(0) +#define MMIO_STATUS_EVT_OVERFLOW_MASK BIT(0) #define MMIO_STATUS_EVT_INT_MASK BIT(1) #define MMIO_STATUS_COM_WAIT_INT_MASK BIT(2) +#define MMIO_STATUS_EVT_RUN_MASK BIT(3) #define MMIO_STATUS_PPR_INT_MASK BIT(6) #define MMIO_STATUS_GALOG_RUN_MASK BIT(8) #define MMIO_STATUS_GALOG_OVERFLOW_MASK BIT(9) |