diff options
| author | Lu Baolu <baolu.lu@linux.intel.com> | 2024-02-12 09:22:24 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-02-16 15:19:34 +0100 |
| commit | 0095bf83554f8e7a681961656608101bdf40e9ef (patch) | |
| tree | 95b9a5792fc4b31b55135f97066cc7c4844e8222 /include/linux/iommu.h | |
| parent | a74c077b9021b36c785095c571336e5b204d3c2d (diff) | |
iommu: Improve iopf_queue_remove_device()
Convert iopf_queue_remove_device() to return void instead of an error code,
as the return value is never used. This removal helper is designed to be
never-failed, so there's no need for error handling.
Ack all outstanding page requests from the device with the response code of
IOMMU_PAGE_RESP_INVALID, indicating device should not attempt any retry.
Add comments to this helper explaining the steps involved in removing a
device from the iopf queue and disabling its PRI. The individual drivers
are expected to be adjusted accordingly. Here we just define the expected
behaviors of the individual iommu driver from the core's perspective.
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Yan Zhao <yan.y.zhao@intel.com>
Link: https://lore.kernel.org/r/20240212012227.119381-14-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 1e9161ae95da..92dfd9b94577 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -1542,7 +1542,7 @@ iommu_sva_domain_alloc(struct device *dev, struct mm_struct *mm) #ifdef CONFIG_IOMMU_IOPF int iopf_queue_add_device(struct iopf_queue *queue, struct device *dev); -int iopf_queue_remove_device(struct iopf_queue *queue, struct device *dev); +void iopf_queue_remove_device(struct iopf_queue *queue, struct device *dev); int iopf_queue_flush_dev(struct device *dev); struct iopf_queue *iopf_queue_alloc(const char *name); void iopf_queue_free(struct iopf_queue *queue); @@ -1558,10 +1558,9 @@ iopf_queue_add_device(struct iopf_queue *queue, struct device *dev) return -ENODEV; } -static inline int +static inline void iopf_queue_remove_device(struct iopf_queue *queue, struct device *dev) { - return -ENODEV; } static inline int iopf_queue_flush_dev(struct device *dev) |