On 6/1/23 2:58 PM, Jason Gunthorpe wrote: > On Thu, Jun 01, 2023 at 02:15:59PM -0400, Dennis Dalessandro wrote: >> On 6/1/23 1:45 PM, Jason Gunthorpe wrote: >>> On Fri, May 19, 2023 at 12:54:30PM -0400, Dennis Dalessandro wrote: >>>> From: Patrick Kelsey <pat.kelsey@xxxxxxxxxxxxxxxxxxxx> >>>> >>>> In order to handle user SDMA requests where the packet payload is to be >>>> constructed from memory other than system memory, do user SDMA >>>> page-pinning through the page-pinning interface. The page-pinning >>>> interface lets the user SDMA code operate on user_sdma_iovec objects >>>> without caring which type of memory that iovec's iov.iov_base points to. >>> >>> What is "other than system memory" memory?? >> >> For instance dmabuff, or something new in the future. This is pre-req work to >> make it more abstract and general purpose and design it in a way it probably >> should have been in the first place. > > But why is there uapi components to this? We added a new sdma req opcode and associated meminfo structure for the sdma request. > And HFI doesn't support DMABUF? It will through the psm2/libfabric interface soon. -Denny
