hi,
we are debugging the SSD usage of the S32R45 board, the PCIe link is connected, i can also find the SSD device,uboot and kernel information are as follows,
uboot detect info,
=> pci
Showing already found devices. Not re-enumerating the bus.
Scanning PCI devices on bus 0
BusDevFun VendorId DeviceId Device Class Sub-Class
_____________________________________________________________
00.00.00 0x1957 0x4002 Build before PCI Rev2.0 0x00
kernel detect info,
root@s32r45evb:~/muniu# lspci
0000:00:00.0 PCI bridge: Freescale Semiconductor Inc Device 4002
0001:00:00.0 PCI bridge: Freescale Semiconductor Inc Device 4002
0001:01:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd Device a80a
However, the NVMe initialization failure occurs, it should be the NVME I/O command timeout, but the specific cause is not located, and the error message is as follows:
[ 4.099855] nvme nvme0: pci function 0001:01:00.0
[ 64.540710] nvme nvme0: I/O 16 QID 0 timeout, disable controller
[ 64.648677] nvme nvme0: Device shutdown incomplete; abort shutdown
[ 64.648984] nvme nvme0: Identify Controller failed (-4)
[ 64.648995] nvme nvme0: Removing after probe failure status: -5
The following questions need your help to confirm:
1> Does the kernel driver layer need to be adjusted separately for the NVMe part?
2> How do I debug this problem? Do I need to configure PCIe controller registers separately for verification?(I found that there are many similar problems on the Internet, but no good solutions have been proposed)
3> Is there anything else to pay special attention to in hardware design?【the PCIE part schematic as follows】
Remark, on another version of our self-developed S32R45 board, PCIe and NVMe drivers are normal;What confuses me even more,the circuit design of the PCIE part of the hardware board is almost the same as the 2 versions of the hardware board, and the same boot parameters and kernel version are used on the software.
The output logs related to the kernel driver are as follows：
[ 3.984311] s32gen1-pcie 44100000.pcie: Configuring as RootComplex
[ 3.984328] s32gen1-pcie 44100000.pcie: host bridge /soc/pcie@44100000 ranges:
[ 3.984377] s32gen1-pcie 44100000.pcie: IO 0x4ffffe0000..0x4ffffeffff -> 0x0000000000
[ 3.984404] s32gen1-pcie 44100000.pcie: MEM 0x4800000000..0x4ffffdffff -> 0x0000000000
[ 4.084510] s32gen1-pcie 44100000.pcie: Link up
[ 4.086553] s32gen1-pcie 44100000.pcie: Link up
[ 4.086562] s32gen1-pcie 44100000.pcie: Link up, Gen=3
[ 4.086696] s32gen1-pcie 44100000.pcie: PCI host bridge to bus 0001:00
[ 4.086708] pci_bus 0001:00: root bus resource [bus 00-ff]
[ 4.086722] pci_bus 0001:00: root bus resource [io 0x10000-0x1ffff] (bus address [0x0000-0xffff])
[ 4.086734] pci_bus 0001:00: root bus resource [mem 0x4800000000-0x4ffffdffff] (bus address [0x00000000-0x7fffdffff])
[ 4.086783] pci 0001:00:00.0: [1957:4002] type 01 class 0x060400
[ 4.086809] pci 0001:00:00.0: reg 0x10: [mem 0x4800000000-0x48000fffff]
[ 4.086828] pci 0001:00:00.0: reg 0x38: [mem 0x4800000000-0x480000ffff pref]
[ 4.086908] pci 0001:00:00.0: supports D1
[ 4.086917] pci 0001:00:00.0: PME# supported from D0 D1 D3hot D3cold
[ 4.089333] pci 0001:00:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
[ 4.089614] pci 0001:01:00.0: [144d:a80a] type 00 class 0x010802
[ 4.089765] pci 0001:01:00.0: reg 0x10: [mem 0x4800100000-0x4800103fff 64bit]
[ 4.090844] pci 0001:01:00.0: 15.752 Gb/s available PCIe bandwidth, limited by 8.0 GT/s PCIe x2 link at 0001:00:00.0 (capable of 63.012 Gb/s with 16.0 GT/s PCIe x4 link)
[ 4.098829] pci_bus 0001:01: busn_res: [bus 01-ff] end is updated to 01
[ 4.098870] pci 0001:00:00.0: BAR 0: assigned [mem 0x4800000000-0x48000fffff]
[ 4.098885] pci 0001:00:00.0: BAR 8: assigned [mem 0x4800100000-0x48001fffff]
[ 4.098895] pci 0001:00:00.0: BAR 6: assigned [mem 0x4800200000-0x480020ffff pref]
[ 4.098913] pci 0001:01:00.0: BAR 0: assigned [mem 0x4800100000-0x4800103fff 64bit]
[ 4.098982] pci 0001:00:00.0: PCI bridge to [bus 01]
[ 4.098992] pci 0001:00:00.0: bridge window [mem 0x4800100000-0x48001fffff]
[ 4.099210] pcieport 0001:00:00.0: enabling device (0000 -> 0002)
[ 4.099356] pcieport 0001:00:00.0: PME: Signaling with IRQ 102
[ 4.099855] nvme nvme0: pci function 0001:01:00.0
[ 64.540710] nvme nvme0: I/O 16 QID 0 timeout, disable controller
[ 64.648677] nvme nvme0: Device shutdown incomplete; abort shutdown
[ 64.648984] nvme nvme0: Identify Controller failed (-4)
[ 64.648995] nvme nvme0: Removing after probe failure status: -5
We look forward to your response！
