Hi, Resurrecting an old series [1], now that we have an in-tree user for it. For regular BAR, drivers can use pci_resize_resource to resize it to the desired size provided that it is supported by the hardware, which the driver can query using pci_rebar_get_possible_sizes. This series expands the API to work with IOV BAR as well. It also adds the additional API to allow extending the VF BAR within the original resource boundary. Thanks, -Michał [1] https://lore.kernel.org/all/20211215141626.3090807-1-michal.winiarski@xxxxxxxxx/ v1 -> v2: - Add pci_iov_resource_extend() and usage in Xe driver - Reduce the number of ifdefs (Christian) - Drop patch 2/2 from v1 (Christian) - Add a helper to avoid upsetting static analysis tools (Krzysztof) v2 -> v3: - Extract introducing pci_resource_is_iov to separate commit and use it elsewhere in PCI subsystem (Christian) - Extract restoring VF rebar state to separate commit (Christian) - Reorganize memory decoding check (Christian) - Don't use dev_WARN (Ilpo) - Fix build without CONFIG_PCI_IOV (CI) Michał Winiarski (5): PCI/IOV: Restore VF resizable BAR state after reset PCI: Add a helper to identify IOV resources PCI: Allow IOV resources to be resized in pci_resize_resource PCI/IOV: Allow extending VF BAR within original resource boundary drm/xe/pf: Extend the VF LMEM BAR drivers/gpu/drm/xe/regs/xe_bars.h | 1 + drivers/gpu/drm/xe/xe_sriov_pf.c | 8 ++ drivers/pci/iov.c | 141 +++++++++++++++++++++++++++++- drivers/pci/pci.c | 9 +- drivers/pci/pci.h | 27 +++++- drivers/pci/setup-bus.c | 5 +- drivers/pci/setup-res.c | 37 ++++++-- include/linux/pci.h | 3 + include/uapi/linux/pci_regs.h | 1 + 9 files changed, 213 insertions(+), 19 deletions(-) -- 2.47.0
