Am 21. August 2025 03:36:44 UTC schrieb Guenter Roeck <li...@roeck-us.net>:
>On 8/20/25 14:19, Bernhard Beschow wrote:
>> This series fixes the Designware PCIe host to work with cards other than
>> virio-net-pci, e.g. e1000. It was tested on the imx8mp-evk machine.
>>
>> The series is structured as follows: The first part refactors the device
>> model to create memory regions for inbound/outbound PCI mappings on demand
>> rather than upfront since this approach doesn't scale for adding I/O space
>> support. The second part consists of fixing the memory mapping by adding I/O
>> space support and fixing default inbound viewport mapping. The third part
>> concludes the series by implementing device reset and cleaning up the imx8mp
>> SoC
>> implementation.
>>
>> Testing done:
>> * Boot imx8mp-evk machine with Buildroot while having an e1000 card attached.
>> Observe that it gets an IP address via DHCP and allows for downloading an
>> HTML
>> file via HTTP.
>>
>Crashing for me even if no PCIe card is attached. This is with the series
>applied
>on top of 10.1.0-rc4 or 10.0.3. I have not tried to track down the problem.
>
>Guenter
Hi Guenther,
Thanks for testing this series! I can reproduce the issue with Buildroot while
the functional test passes...
I guess that I was too optimistic in having resolved the issue mentioned in the
last patch. Does it work for you if you omit it?
Thanks,
Bernhard
>
>---
>Build reference: v6.17-rc1-287-g685de850cabf
>Compiler version: aarch64-linux-gcc (GCC) 13.4.0
>Qemu version: 10.0.94 (v10.1.0-rc4-55-g320ed12bd9)
>
>[ 7.748393] Internal error: synchronous external abort: 0000000096000010
>[#1] SMP
>[ 7.748917] Modules linked in:
>[ 7.749533] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G M
> N 6.17.0-rc2-g685de850cabf #1 PREEMPT
>[ 7.749689] Tainted: [M]=MACHINE_CHECK, [N]=TEST
>[ 7.749745] Hardware name: NXP i.MX8MPlus EVK board (DT)
>[ 7.750118] ok 1 block_bits=10 cluster_bits=3 blocks_per_group=8192
>group_count=4 desc_size=64
>[ 7.749922] Workqueue: async async_run_entry_fn
>[ 7.751174] pstate: 200000c5 (nzCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
>[ 7.751267] pc : pci_generic_config_read+0x38/0xb8
>[ 7.751370] lr : pci_generic_config_read+0x24/0xb8
>[ 7.751474] sp : ffff8000845fb730
>[ 7.751532] x29: ffff8000845fb730 x28: 00000000000000ff x27:
>0000000000000000
>[ 7.751686] x26: 0000000000000001 x25: ffff80008290c008 x24:
>ffff8000832cbe80
>[ 7.751770] x23: 0000000000000000 x22: ffff8000845fb844 x21:
>ffff000008a73800
>[ 7.751859] x20: ffff8000845fb7a4 x19: 0000000000000004 x18:
>00000000ffffffff
>[ 7.751942] x17: ffff800080e2f918 x16: ffff800080e2f7ac x15:
>ffff800080e2e6d8
>[ 7.752027] x14: 0000000000000000 x13: 0000000000000000 x12:
>ffff80008427cab8
>[ 7.752120] x11: 0000000000000326 x10: 0000000000000326 x9 :
>00000000000c0326
>[ 7.752225] x8 : 000000006973b6c5 x7 : ffff800085c00000 x6 :
>0000000000000000
>[ 7.752320] x5 : ffff000007cc5080 x4 : 0000000000000000 x3 :
>0000000000000000
>[ 7.752403] x2 : 0000000000000000 x1 : ffff000004bf5680 x0 :
>ffff800085900000
>[ 7.752577] Call trace:
>[ 7.752694] pci_generic_config_read+0x38/0xb8 (P)
>[ 7.752794] dw_pcie_rd_other_conf+0x38/0xb0
>[ 7.752851] pci_bus_read_config_dword+0x80/0xe4
>[ 7.752903] pci_bus_generic_read_dev_vendor_id+0x30/0x190
>[ 7.752964] pci_scan_device+0xdc/0x184
>[ 7.753010] pci_scan_slot+0xe0/0x23c
>[ 7.753056] pci_scan_child_bus_extend+0x44/0x2cc
>[ 7.753110] pci_scan_bridge_extend+0x514/0x598
>[ 7.753166] pci_scan_child_bus_extend+0x104/0x2cc
>[ 7.753220] pci_scan_root_bus_bridge+0x64/0xd8
>[ 7.753273] pci_host_probe+0x34/0x10c
>[ 7.753328] dw_pcie_host_init+0x2f0/0x4b0
>[ 7.753376] imx_pcie_probe+0x33c/0x70c
>[ 7.753439] platform_probe+0x5c/0x9c
>[ 7.753485] really_probe+0xc0/0x390
>[ 7.753530] __driver_probe_device+0x7c/0x15c
>[ 7.753581] driver_probe_device+0x3c/0x110
>[ 7.753633] __device_attach_driver+0xbc/0x158
>
