On Thu, Jun 01, 2023 at 03:11:44PM -0400, Dennis Dalessandro wrote: > 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. I don't want to add uapi stuff that has no use.. Jason
