[PATCH v2 00/14] Support PCIe RC to AST2600 and AST2700

[Jamin Lin via <qemu-devel@nongnu.org>]

v1:
 1. Add PCIe PHY, CFG, and MMIO window support for AST2600.
    Note: Only supports RC_H.
 2. Add PCIe PHY, CFG, and MMIO window support for AST2700.
    Note: Supports 3 RCs.

v2:
  1. Introduce a new root port device.
  2. For AST2600 RC_H, add the root device at 80:00.0 and a root port at 80.08.0 
     to match the real hardware topology, allowing users to attach PCIe devices 
     at the root port.
  3. For AST2700, add a root port at 00.00.0 for each PCIe root complex to match
     the real hardware topology, allowing users to attach PCIe devices at the
     root port.

Dependencies

QEMU version:
https://github.com/qemu/qemu/commit/6a9fa5ef3230a7d51e0d953a59ee9ef10af705b8

his patch series depends on the following patch series:
1. https://patchwork.kernel.org/project/qemu-devel/patch/20250902062550.3797040-1-jamin_lin@aspeedtech.com/
2. https://patchwork.kernel.org/project/qemu-devel/cover/20250904100556.1729604-1-kane_chen@aspeedtech.com/


Testing the PCIe Root Complex model with the e1000e PCIe device

AST2600 test environment
Test image: ASPEED SDK v09.07
Download
https://github.com/AspeedTech-BMC/openbmc/releases/download/v09.07/ast2600-default-obmc.tar.gz

When booted, lspci should show one root device at 80:00.0 and a root
port at 80:08.0, matching the expected hardware topology:

```
root@ast2600-default:~# lspci
80:00.0 Host bridge: ASPEED Technology, Inc. Device 2600
80:08.0 PCI bridge: ASPEED Technology, Inc. AST1150 PCI-to-PCI Bridge
```

The e1000e driver is included in this image. Attach the e1000e device on
bus pcie.0 with the following command line:

```
 -device e1000e,netdev=net0,bus=pcie.0 \
 -netdev user,id=net0,hostfwd=:127.0.0.1:3222-:22,hostname=qemu0 \
```

After boot, lspci should show the e1000e device enumerated at 81:00.0:

```
root@ast2600-default:~# lspci
80:00.0 Host bridge: ASPEED Technology, Inc. Device 2600
80:08.0 PCI bridge: ASPEED Technology, Inc. AST1150 PCI-to-PCI Bridge
81:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
```

The e1000e driver should probe successfully, and a new Ethernet interface
should appear:

```
root@ast2600-default:~# ifconfig
eth4      Link encap:Ethernet  HWaddr 52:54:00:12:34:5A
          inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
          inet6 addr: fe80::5054:ff:fe12:345a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:25 errors:0 dropped:0 overruns:0 frame:0
          TX packets:57 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:5524 (5.3 KiB)  TX bytes:8488 (8.2 KiB)
          Interrupt:81 Memory:70040000-70060000
```
          
AST2700 test environment
Test image: ASPEED SDK v09.07
Download
https://github.com/AspeedTech-BMC/openbmc/releases/download/v09.07/ast2700-default-obmc.tar.gz

By default, the ASPEED SDK only enables PCIe root complex 2 (RC2). If you
want to test all three PCIe root complexes, please use the customized
image provided here:
 https://github.com/jamin-aspeed/openbmc/releases/download/qemu-test-0907/ast2700-default-pcie-qemu.tar.xz

When booted, lspci should show one root port at 00:00.0 on the
pcie.2 bus. The domain for PCIe RC2 is 0002, which matches the
expected hardware topology:

```
root@ast2700-default:~# lspci
0002:00:00.0 PCI bridge: ASPEED Technology, Inc. AST1150 PCI-to-PCI Bridge
```

The e1000e driver is included in this image. Attach the e1000e device to
bus pcie.2 using the following command line:

```
 -device e1000e,netdev=net0,bus=pcie.2 \
 -netdev user,id=net0,hostfwd=:127.0.0.1:3222-:22,hostname=qemu0 \
```

After boot, lspci should show the e1000e device enumerated at
0002:01:00.0:

```
root@ast2700-default:~# lspci
0002:00:00.0 PCI bridge: ASPEED Technology, Inc. AST1150 PCI-to-PCI Bridge
0002:01:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
```

The e1000e driver should probe successfully, and a new Ethernet interface
should appear:

```
root@ast2700-default:~# ifconfig
eth2      Link encap:Ethernet  HWaddr 52:54:00:12:34:56
          inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
          inet6 addr: fe80::5054:ff:fe12:3456/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:21 errors:0 dropped:0 overruns:0 frame:0
          TX packets:48 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:5388 (5.2 KiB)  TX bytes:8244 (8.0 KiB)
          Interrupt:42 Memory:a0040000-a0060000
```          
          
Jamin Lin (14):
  hw/pci/pci_ids Add PCI vendor ID for ASPEED
  hw/pci-host/aspeed: Add AST2600 PCIe PHY model
  hw/pci-host/aspeed: Add AST2600 PCIe config space and host bridge
  hw/pci-host/aspeed: Add AST2600 PCIe Root Device support
  hw/pci-host/aspeed: Add AST2600 PCIe Root Port and make address
    configurable
  hw/pci-host/aspeed: Add MSI support and per-RC IOMMU address space
  hw/arm/aspeed: Wire up PCIe devices in SoC model
  hw/arm/aspeed_ast2600: Add PCIe RC support (RC_H only)
  hw/pci-host/aspeed: Add AST2700 PCIe PHY
  hw/pci-host/aspeed: Add AST2700 PCIe config with dedicated H2X blocks
  hw/pci-host/aspeed: Disable Root Device and place Root Port at 00:00.0
    to AST2700
  hw/arm/aspeed_ast27x0: Introduce 3 PCIe RCs for AST2700
  tests/functional/arm/test_aspeed_ast2600: add PCIe enumeration test
  tests/functional/aarch64/aspeed_ast2700: add PCIe enumeration test

 include/hw/arm/aspeed_soc.h                   |   14 +
 include/hw/pci-host/aspeed_pcie.h             |  138 +++
 include/hw/pci/pci_ids.h                      |    2 +
 hw/arm/aspeed_ast2600.c                       |   69 +-
 hw/arm/aspeed_ast27x0.c                       |   61 +
 hw/pci-host/aspeed_pcie.c                     | 1014 +++++++++++++++++
 hw/arm/Kconfig                                |    3 +
 hw/pci-host/Kconfig                           |    4 +
 hw/pci-host/meson.build                       |    1 +
 hw/pci-host/trace-events                      |   11 +
 .../functional/aarch64/test_aspeed_ast2700.py |    7 +
 .../aarch64/test_aspeed_ast2700fc.py          |    6 +
 tests/functional/arm/test_aspeed_ast2600.py   |   10 +
 13 files changed, 1337 insertions(+), 3 deletions(-)
 create mode 100644 include/hw/pci-host/aspeed_pcie.h
 create mode 100644 hw/pci-host/aspeed_pcie.c

-- 
2.43.0