[v9,0/8] Add SR-IOV support in PCIe Endpoint Core

Patch series
*) Adds support to add virtual functions to enable endpoint controller
   which supports SR-IOV capability
*) Add support in Cadence endpoint driver to configure virtual functions
*) Enable pci_endpoint_test driver to create pci_device for virtual
   functions

v1 of the patch series can be found at [1]
v2 of the patch series can be found at [2]
v3 of the patch series can be found at [3]
v4 of the patch series can be found at [4]
v5 of the patch series can be found at [5]
v6 of the patch series can be found at [6]
v7 of the patch series can be found at [7]
v8 of the patch series can be found at [8]

Here both physical functions and virtual functions use the same
pci_endpoint_test driver and existing pcitest utility can be used
to test virtual functions as well.

Changes from v8:
1) Include pci-epf.h in pcie-cadence.h and use BAR_4 instead of 4
2) Get reg for configuring BAR using if..else.. for physical function
and virtual function instead of over-writing reg for virtual function.

Changes from v7:
1) Added conditional operator to consicely write code to configure BAR
   (Added a new patch to first simplify configuring BAR for physical
    function)
2) Return error if virtual function number is > 1 for configuring config
   space header

Changes from v6:
*) Rebased to 5.14-rc4

Changes from v5:
*) Rebased to 5.13-rc1

Changes from v4:
*) Added a fix in Cadence driver which was overwriting BAR configuration
   of physical function.
*) Didn't include Tom's Acked-by since Cadence driver is modified in
   this revision.

Changes from v3:
*) Fixed Rob's comment and added his Reviewed-by as suggested by him.

Changes from v2:
*) Fixed DT binding documentation comment by Rob
*) Fixed the error check in pci-epc-core.c

Changes from v1:
*) Re-based and Re-worked to latest kernel 5.10.0-rc2+ (now has generic
   binding for EP)

[1] -> http://lore.kernel.org/r/20191231113534.30405-1-kishon@ti.com
[2] -> http://lore.kernel.org/r/20201112175358.2653-1-kishon@ti.com
[3] -> https://lore.kernel.org/r/20210305050410.9201-1-kishon@ti.com
[4] -> http://lore.kernel.org/r/20210310160943.7606-1-kishon@ti.com
[5] -> https://lore.kernel.org/r/20210419083401.31628-1-kishon@ti.com
[6] -> http://lore.kernel.org/r/20210517074723.10212-1-kishon@ti.com
[7] -> https://lore.kernel.org/r/20210803050310.27122-1-kishon@ti.com
[8] -> https://lore.kernel.org/r/20210811064656.15399-1-kishon@ti.com

Kishon Vijay Abraham I (8):
  dt-bindings: PCI: pci-ep: Add binding to specify virtual function
  PCI: endpoint: Add support to add virtual function in endpoint core
  PCI: endpoint: Add support to link a physical function to a virtual
    function
  PCI: endpoint: Add virtual function number in pci_epc ops
  PCI: cadence: Simplify code to get register base address for
    configuring BAR
  PCI: cadence: Add support to configure virtual functions
  misc: pci_endpoint_test: Populate sriov_configure ops to configure
    SR-IOV device
  Documentation: PCI: endpoint/pci-endpoint-cfs: Guide to use SR-IOV

 .../PCI/endpoint/pci-endpoint-cfs.rst         |  12 +-
 .../devicetree/bindings/pci/pci-ep.yaml       |   7 +
 drivers/misc/pci_endpoint_test.c              |   1 +
 .../pci/controller/cadence/pcie-cadence-ep.c  | 196 +++++++++++++-----
 drivers/pci/controller/cadence/pcie-cadence.h |  12 ++
 .../pci/controller/dwc/pcie-designware-ep.c   |  36 ++--
 drivers/pci/controller/pcie-rcar-ep.c         |  19 +-
 drivers/pci/controller/pcie-rockchip-ep.c     |  18 +-
 drivers/pci/endpoint/functions/pci-epf-ntb.c  |  89 ++++----
 drivers/pci/endpoint/functions/pci-epf-test.c |  74 ++++---
 drivers/pci/endpoint/pci-ep-cfs.c             |  24 +++
 drivers/pci/endpoint/pci-epc-core.c           | 134 ++++++++----
 drivers/pci/endpoint/pci-epf-core.c           | 146 ++++++++++++-
 include/linux/pci-epc.h                       |  57 ++---
 include/linux/pci-epf.h                       |  16 +-
 15 files changed, 616 insertions(+), 225 deletions(-)