A few things in iommu_domain structure (such as iova_cookie, iommufd_hwpt,
fault handler, and etc) are exclusive to certain types of iommu_domains.
So, all of them can be seen as domain cookies in different cookie types.
Furthermore, iova_cookie is shared with the msi_cookie use case. It could
be cleaner by decoupling these too.
Define an enum iommu_domain_cookie_type to fit all those cookies in.
Since there are only two sw_msi implementations, check domain->cookie_type
in iommu_dma_prepare_msi() to call the corresponding sw_msi function.
This is a clean-up series for the previous sw_msi Part-1 core series. It's
on github:
https://github.com/nicolinc/iommufd/commits/iommufd_msi_cleanup-v4
Changelog
v4
* Rebase on top of a bug fix for hwpt_iommufd cookie
https://lore.kernel.org/all/20250305211800.229465-1-nicolinc@nvidia.com/
* Add Reviewed-by from Robin and Kevin
* Add missing "break;" in iommu_domain_free()
* Drop "linux/msi.h" header from the iommufd/device code
* Set iommufd_sw_msi_install's SYMBOL to "IOMMUFD_INTERNAL"
* Update commit messages for typo fixing and size comparison
* Add a local msi_page_list to cache cookie_msi_pages(domain) return
* Add an inline iommufd_group_setup_msi() for !CONFIG_IRQ_MSI_IOMMU
v3
https://lore.kernel.org/all/cover.1741034885.git.nicolinc@nvidia.com/
* Integrate Robin's patch
https://lore.kernel.org/linux-iommu/4e68d5820be06adc1b34fc0d1c9399481151daee.1740742271.git.robin.murphy@arm.com/
replacing private_data_owner with the new cookie_type
* Move iommu_sw_msi stub from the public header to iommu-priv.h
v2
https://lore.kernel.org/all/cover.1740705776.git.nicolinc@nvidia.com/
* Drop sw_msi function pointer
* Add a new private_data_owner tag in iommu_domain
* Let iommu core call the two sw_msi implementations directly
v1
https://lore.kernel.org/all/cover.1740600272.git.nicolinc@nvidia.com/
Thanks
Nicolin
Nicolin Chen (2):
iommufd: Move iommufd_sw_msi and related functions to driver.c
iommu: Drop sw_msi from iommu_domain
Robin Murphy (1):
iommu: Sort out domain user data
drivers/iommu/dma-iommu.h | 14 ++
drivers/iommu/iommu-priv.h | 13 ++
drivers/iommu/iommufd/iommufd_private.h | 7 +-
include/linux/iommu.h | 35 ++--
drivers/iommu/dma-iommu.c | 208 ++++++++++++------------
drivers/iommu/iommu-sva.c | 1 +
drivers/iommu/iommu.c | 35 +++-
drivers/iommu/iommufd/device.c | 131 +--------------
drivers/iommu/iommufd/driver.c | 125 ++++++++++++++
drivers/iommu/iommufd/hw_pagetable.c | 6 +-
10 files changed, 320 insertions(+), 255 deletions(-)
base-commit: 4b022ff93d8b332891cae818a7331942db50610f
--
2.43.0