libhsakmt: Implement dmabuf export for RDMA

Implement hsaKmtExportDMABufHandle, which can be used for a new
upstreamable RDMA solution. It exports a DMABuf handle for an arbitrary
virtual address along with the offset of the address within the
allocation. It also checks that the size of the intended export does
not exceed the allocation.

This uses the new AMDKFD_IOC_EXPORT_DMABUF, which requires KFD ioctl
API version 1.12.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Change-Id: Ie5fdb1f73ab3c7fa36c315ce326b1fb89eacc8b6

This commit is contained in:

Felix Kuehling

2021-11-16 23:13:11 -05:00

parent e40ae8481e

commit 332f59eb2a

6 changed files with 93 additions and 2 deletions

src/libhsakmt.ver

View File

@@ -70,6 +70,7 @@ hsaKmtSVMGetAttr;
 hsaKmtSetXNACKMode;
 hsaKmtGetXNACKMode;
 hsaKmtOpenSMI;
 hsaKmtExportDMABufHandle;
 local: *;
 };