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author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-07 00:22:58 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-07 00:22:58 +0300 |
commit | a2de4bbddce3e98bd2444bb027dc84418a0066b1 (patch) | |
tree | 4252b3c6f3efeaccc418a543dfa7e5be305c1b2d /include/uapi | |
parent | 38182162b50aa4e970e5997df0a0c4288147a153 (diff) | |
parent | cc35518d29bc8e38902866b74874b4a3f1ad3617 (diff) | |
download | linux-a2de4bbddce3e98bd2444bb027dc84418a0066b1.tar.xz |
Merge tag 'vfio-v5.13-rc1pt2' of git://github.com/awilliam/linux-vfio
Pull more VFIO updates from Alex Williamson:
"A second small set of commits for this merge window, primarily to
unbreak some deletions from our uAPI header.
- Additional mdev sample driver cleanup (Dan Carpenter)
- Doc fix (Alyssa Ross)
- Unbreak uAPI from NVLink2 support removal (Alex Williamson)"
* tag 'vfio-v5.13-rc1pt2' of git://github.com/awilliam/linux-vfio:
docs: vfio: fix typo
vfio/pci: Revert nvlink removal uAPI breakage
vfio/mdev: remove unnecessary NULL check in mbochs_create()
Diffstat (limited to 'include/uapi')
-rw-r--r-- | include/uapi/linux/vfio.h | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 34b1f53a3901..ef33ea002b0b 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -333,10 +333,21 @@ struct vfio_region_info_cap_type { #define VFIO_REGION_SUBTYPE_INTEL_IGD_LPC_CFG (3) /* 10de vendor PCI sub-types */ -/* subtype 1 was VFIO_REGION_SUBTYPE_NVIDIA_NVLINK2_RAM, don't use */ +/* + * NVIDIA GPU NVlink2 RAM is coherent RAM mapped onto the host address space. + * + * Deprecated, region no longer provided + */ +#define VFIO_REGION_SUBTYPE_NVIDIA_NVLINK2_RAM (1) /* 1014 vendor PCI sub-types */ -/* subtype 1 was VFIO_REGION_SUBTYPE_IBM_NVLINK2_ATSD, don't use */ +/* + * IBM NPU NVlink2 ATSD (Address Translation Shootdown) register of NPU + * to do TLB invalidation on a GPU. + * + * Deprecated, region no longer provided + */ +#define VFIO_REGION_SUBTYPE_IBM_NVLINK2_ATSD (1) /* sub-types for VFIO_REGION_TYPE_GFX */ #define VFIO_REGION_SUBTYPE_GFX_EDID (1) @@ -630,9 +641,36 @@ struct vfio_device_migration_info { */ #define VFIO_REGION_INFO_CAP_MSIX_MAPPABLE 3 -/* subtype 4 was VFIO_REGION_INFO_CAP_NVLINK2_SSATGT, don't use */ +/* + * Capability with compressed real address (aka SSA - small system address) + * where GPU RAM is mapped on a system bus. Used by a GPU for DMA routing + * and by the userspace to associate a NVLink bridge with a GPU. + * + * Deprecated, capability no longer provided + */ +#define VFIO_REGION_INFO_CAP_NVLINK2_SSATGT 4 + +struct vfio_region_info_cap_nvlink2_ssatgt { + struct vfio_info_cap_header header; + __u64 tgt; +}; -/* subtype 5 was VFIO_REGION_INFO_CAP_NVLINK2_LNKSPD, don't use */ +/* + * Capability with an NVLink link speed. The value is read by + * the NVlink2 bridge driver from the bridge's "ibm,nvlink-speed" + * property in the device tree. The value is fixed in the hardware + * and failing to provide the correct value results in the link + * not working with no indication from the driver why. + * + * Deprecated, capability no longer provided + */ +#define VFIO_REGION_INFO_CAP_NVLINK2_LNKSPD 5 + +struct vfio_region_info_cap_nvlink2_lnkspd { + struct vfio_info_cap_header header; + __u32 link_speed; + __u32 __pad; +}; /** * VFIO_DEVICE_GET_IRQ_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 9, |