PCIe Root Port/Bus Not Detected in VMD

[Neel Chauhan]

For reference, I am attaching the `pciconf -lv` and `acpidump -dt` 
dumps.

-Neel

On 2020-12-30 21:41, Neel Chauhan wrote:
> Hi freebsd-hackers@,
> 
> My apologies for so many emails from me.
> 
> I have the following patch:
> 
> diff --git a/sys/dev/vmd/vmd.c b/sys/dev/vmd/vmd.c
> index 2cc6f45bed9..7cc0a8a91a7 100644
> --- a/sys/dev/vmd/vmd.c
> +++ b/sys/dev/vmd/vmd.c
> @@ -66,10 +66,12 @@ struct vmd_type {
>  #define INTEL_VENDOR_ID		0x8086
>  #define INTEL_DEVICE_ID_VMD	0x201d
>  #define INTEL_DEVICE_ID_VMD2	0x28c0
> +#define INTEL_DEVICE_ID_VMD3	0x9a0b
> 
>  static struct vmd_type vmd_devs[] = {
>          { INTEL_VENDOR_ID, INTEL_DEVICE_ID_VMD,  "Intel Volume
> Management Device" },
>          { INTEL_VENDOR_ID, INTEL_DEVICE_ID_VMD2, "Intel Volume
> Management Device" },
> +        { INTEL_VENDOR_ID, INTEL_DEVICE_ID_VMD3, "Intel Volume
> Management Device" },
>          { 0, 0, NULL }
>  };
> 
> @@ -425,6 +427,7 @@ vmd_attach(device_t dev)
>  	return (0);
> 
>  fail:
> +	rman_fini(&sc->vmd_bus.rman);
>  	vmd_free(sc);
>  	return (ENXIO);
>  }
> 
> This patch helps me detect the VMD controller, but I am unable to 
> attach to it.
> 
> Therefore, I am not able to attach any PCIe buses that will be used by
> a NVMe SSD.
> 
> If this patch worked, I would see these devices (as I do in Linux):
> 
> 10000:e0:1d.0 PCI bridge [0604]: Intel Corporation Tiger Lake-LP PCI
> Express Root Port #9 [8086:a0b0] (rev 20) SI
> 10000:e0:1d.2 PCI bridge [0604]: Intel Corporation Device [8086:a0b2] 
> (rev 20)
> 10000:e1:00.0 Non-Volatile memory controller [0108]: Intel Corporation
> Device [8086:0975] (rev 03)
> 10000:e2:00.0 Non-Volatile memory controller [0108]: Intel Corporation
> Device [8086:0975]
> 
> And therefore a `nvd*` device.
> 
> Could a developer please help me with this?
> 
> -Neel
> 
> ===
> 
> https://www.neelc.org/
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> freebsd-hackers at freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-hackers
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