[v3,0/6] Add support for PCIe controller to work in endpoint mode on R-Car SoCs

Message

Lad, Prabhakar Jan. 8, 2020, 4:22 p.m. UTC

This patch series adds support for PCIe controller on rcar to work in
endpoint mode, this also extends the epf framework to handle base region
for mapping PCI address locally..

Note:
The cadence/rockchip/designware endpoint drivers are build tested only.

Changes for v3:
1] Fixed review comments from Bjorn and Kishon.
3] Converted to DT schema

Changes for v2:
1] Fixed review comments from Biju for dt-bindings to include an example
   for a tested platform.
2] Fixed review comments from Kishon to extend the features of outbound
   regions in epf framework.
3] Added support to parse outbound-ranges in OF.

lspci output on host:
=====================

01:00.0 Unassigned class [ff00]: Renesas Technology Corp. Device 002d
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 152
        Region 0: Memory at fe200200 (64-bit, non-prefetchable) [size=128]
        Region 2: Memory at fe200000 (64-bit, non-prefetchable) [size=256]
        Region 4: Memory at fe200100 (64-bit, non-prefetchable) [size=256]
        Capabilities: [40] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
                Address: 00000004fa36d000  Data: 0001
                Masking: fffffffe  Pending: 00000000
        Capabilities: [70] Express (v2) Endpoint, MSI 00
                DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s unlimited, L1 unlimited
                        ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 0.000W
                DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
                        RlxdOrd- ExtTag+ PhantFunc- AuxPwr- NoSnoop+
                        MaxPayload 128 bytes, MaxReadReq 128 bytes
                DevSta: CorrErr+ UncorrErr+ FatalErr- UnsuppReq+ AuxPwr- TransPend-
                LnkCap: Port #0, Speed 5GT/s, Width x1, ASPM L0s, Exit Latency L0s unlimited
                        ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp-
                LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk-
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                LnkSta: Speed 5GT/s, Width x1, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
                DevCap2: Completion Timeout: Not Supported, TimeoutDis+, LTR-, OBFF Not Supported
                         AtomicOpsCap: 32bit- 64bit- 128bitCAS-
                DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled
                         AtomicOpsCtl: ReqEn-
                LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-
                         Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
                         Compliance De-emphasis: -6dB
                LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1-
                         EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-
        Capabilities: [100 v1] Virtual Channel
                Caps:   LPEVC=0 RefClk=100ns PATEntryBits=1
                Arb:    Fixed- WRR32- WRR64- WRR128-
                Ctrl:   ArbSelect=Fixed
                Status: InProgress-
                VC0:    Caps:   PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
                        Arb:    Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
                        Ctrl:   Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
                        Status: NegoPending- InProgress-
        Kernel driver in use: pci-endpoint-test

BAR Test
========
root@g2e:~# pcitest -b 0
BAR0:           OKAY
root@g2e:~# pcitest -b 1
BAR1:           NOT OKAY
root@g2e:~# pcitest -b 2
BAR2:           OKAY
root@g2e:~# pcitest -b 3
BAR3:           NOT OKAY
root@g2e:~# pcitest -b 4
BAR4:           OKAY
root@g2e:~# pcitest -b 5
BAR5:           NOT OKAY

Note: BAR test for 1/3/5 fail because they are configured to be 64bits

Interrupt Test
==============
root@g2e:~# pcitest -i 0
SET IRQ TYPE TO LEGACY:         OKAY
root@g2e:~# pcitest -l
LEGACY IRQ:     OKAY

Read Test
=========
root@g2e:~# pcitest -r -s 1
READ (      1 bytes):           OKAY
root@g2e:~# pcitest -r -s 1024
READ (   1024 bytes):           OKAY
root@g2e:~# pcitest -r -s 1025
READ (   1025 bytes):           OKAY
root@g2e:~# pcitest -r -s 1024000
READ (1024000 bytes):           OKAY
root@g2e:~# pcitest -r -s 1024001
READ (1024001 bytes):           OKAY

Write Test
==========
root@g2e:~# pcitest -w -s 1
WRITE (      1 bytes):          OKAY
root@g2e:~# pcitest -w -s 1024
WRITE (   1024 bytes):          OKAY
root@g2e:~# pcitest -w -s 1025
WRITE (   1025 bytes):          OKAY
root@g2e:~# pcitest -w -s 1024000
WRITE (1024000 bytes):          OKAY
root@g2e:~# pcitest -w -s 1024001
WRITE (1024001 bytes):          OKAY

Copy Test
=========
root@g2e:~# pcitest -c -s 1
COPY (      1 bytes):           OKAY
root@g2e:~# pcitest -c -s 1024
COPY (   1024 bytes):           OKAY
root@g2e:~# pcitest -c -s 1025
COPY (   1025 bytes):           OKAY
root@g2e:~# pcitest -c -s 1024000
COPY (1024000 bytes):           OKAY
root@g2e:~# pcitest -c -s 1024001
COPY (1024001 bytes):           OKAY


Lad Prabhakar (6):
  PCI: rcar: Preparation for adding endpoint support
  PCI: rcar: Fix calculating mask for PCIEPAMR register
  PCI: endpoint: Add support to handle multiple base for mapping
    outbound memory
  dt-bindings: PCI: rcar: Add bindings for R-Car PCIe endpoint
    controller
  PCI: rcar: Add support for rcar PCIe controller in endpoint mode
  misc: pci_endpoint_test: Add Device ID for RZ/G2E PCIe controller

 .../devicetree/bindings/pci/rcar-pci-ep.yaml  |   76 +
 arch/arm64/configs/defconfig                  |    2 +-
 drivers/misc/pci_endpoint_test.c              |    3 +
 drivers/pci/controller/Kconfig                |   11 +-
 drivers/pci/controller/Makefile               |    3 +-
 .../pci/controller/cadence/pcie-cadence-ep.c  |   12 +-
 .../pci/controller/dwc/pcie-designware-ep.c   |   31 +-
 drivers/pci/controller/pcie-rcar-ep.c         |  497 +++++++
 drivers/pci/controller/pcie-rcar-host.c       | 1044 ++++++++++++++
 drivers/pci/controller/pcie-rcar.c            | 1232 +----------------
 drivers/pci/controller/pcie-rcar.h            |  132 ++
 drivers/pci/controller/pcie-rockchip-ep.c     |   14 +-
 drivers/pci/endpoint/functions/pci-epf-test.c |   29 +-
 drivers/pci/endpoint/pci-epc-core.c           |    7 +-
 drivers/pci/endpoint/pci-epc-mem.c            |  199 ++-
 include/linux/pci-epc.h                       |   46 +-
 16 files changed, 2064 insertions(+), 1274 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pci/rcar-pci-ep.yaml
 create mode 100644 drivers/pci/controller/pcie-rcar-ep.c
 create mode 100644 drivers/pci/controller/pcie-rcar-host.c
 create mode 100644 drivers/pci/controller/pcie-rcar.h