On 04/20/18 09:28, Alexander Duyck wrote: > This series is meant to add support for SR-IOV on devices when the VFs are > not managed by the kernel. Examples of recent patches attempting to do this > include: > virto - https://patchwork.kernel.org/patch/10241225/ > pci-stub - https://patchwork.kernel.org/patch/10109935/ > vfio - https://patchwork.kernel.org/patch/10103353/ > uio - https://patchwork.kernel.org/patch/9974031/
Hi, Somewhere in this patch series it would be nice to tell us what the heck a "PF" is. :) Thanks. > Since this is quickly blowing up into a multi-driver problem it is probably > best to implement this solution as generically as possible. > > This series is an attempt to do that. What we do with this patch set is > provide a generic framework to enable SR-IOV in the case that the PF driver > doesn't support managing the VFs itself. > > I based my patch set originally on the patch by Mark Rustad but there isn't > much left after going through and cleaning out the bits that were no longer > needed, and after incorporating the feedback from David Miller. At this point > the only items to be fully reused was his patch description which is now > present in patch 3 of the set. > > This solution is limited in scope to just adding support for devices that > provide no functionality for SR-IOV other than allocating the VFs by > calling pci_enable_sriov. Previous sets had included patches for VFIO, but > for now I am dropping that as the scope of that work is larger then I > think I can take on at this time. > > v2: Reduced scope back to just virtio_pci and vfio-pci > Broke into 3 patch set from single patch > Changed autoprobe behavior to always set when num_vfs is set non-zero > v3: Updated Documentation to clarify when sriov_unmanaged_autoprobe is used > Wrapped vfio_pci_sriov_configure to fix build errors w/o SR-IOV in kernel > v4: Dropped vfio-pci patch > Added ena and nvme to drivers now using pci_sriov_configure_unmanaged > Dropped pci_disable_sriov call in virtio_pci to be consistent with ena > v5: Dropped sriov_unmanaged_autoprobe and pci_sriov_conifgure_unmanaged > Added new patch that enables pci_sriov_configure_simple > Updated drivers to use pci_sriov_configure_simple > v6: Defined pci_sriov_configure_simple as NULL when SR-IOV is not enabled > Updated drivers to drop "#ifdef" checks for IOV > Added pci-pf-stub as place for PF-only drivers to add support > v7: Dropped pci_id table explanation from pci-pf-stub driver > Updated pci_sriov_configure_simple to drop need for err value > Fixed comment explaining why pci_sriov_configure_simple is NULL > v8: Dropped virtio from the set, support to be added later after TC approval > > Cc: Mark Rustad <mark.d.rus...@intel.com> > Cc: Maximilian Heyne <mhe...@amazon.de> > Cc: Liang-Min Wang <liang-min.w...@intel.com> > Cc: David Woodhouse <d...@amazon.co.uk> > > --- > > Alexander Duyck (4): > pci: Add pci_sriov_configure_simple for PFs that don't manage VF > resources > ena: Migrate over to unmanaged SR-IOV support > nvme: Migrate over to unmanaged SR-IOV support > pci-pf-stub: Add PF driver stub for PFs that function only to enable VFs > > > drivers/net/ethernet/amazon/ena/ena_netdev.c | 28 ------------- > drivers/nvme/host/pci.c | 20 ---------- > drivers/pci/Kconfig | 12 ++++++ > drivers/pci/Makefile | 2 + > drivers/pci/iov.c | 31 +++++++++++++++ > drivers/pci/pci-pf-stub.c | 54 > ++++++++++++++++++++++++++ > include/linux/pci.h | 3 + > include/linux/pci_ids.h | 2 + > 8 files changed, 106 insertions(+), 46 deletions(-) > create mode 100644 drivers/pci/pci-pf-stub.c > > -- > -- ~Randy
