I don't have a MacBook. I don't own one and my work gives me a ThinkPad
(but runs Windows).
I believe the issue on new Macs is the NVMe queue size or something.
You should read the Linux driver, the FreeBSD equivalents, and then
build your patch on the differences in how the hardware is handled. This
is how I got my 2018 HP Spectre x360 to work (but with different
subsystems), and you could do the same on newer Apple NVMe.
If you get something working, consider making a patch and submitting it.
That's what I done with my Spectre, and it has been in HEAD for a few
months now.
-Neel
===
https://www.neelc.org/
On 2020-04-29 10:43, Yuri Pankov wrote:
I have tried booting latest -current snapshot on 2019 macbook pro 16,
and noticed that nvme driver didn't attach, as class reported is
0x018002 and not 0x010802 that we expect in nvme_pci.c.
The following linux changes seem to be related:
https://github.com/torvalds/linux/commit/66341331ba0d2de4ff421cdc401a1e34de50502a
https://github.com/torvalds/linux/commit/d38e9f04ebf667d9cb8185b45bff747485f1d3e9
I have tried adding the exact PCI IDs, but that also fails as number
of msix vectors seems to be 0 in nvme_ctrlr_setup_interrupts() and
nvme_ctrlr_configure_intx() fails with "unable to allocate shared
IRQ".
Any hints on how to proceed here?
pciconf excerpt:
none7@pci0:4:0:0: class=0x018002 rev=0x01 hdr=0x00 vendor=0x106b
device=0x2005 subvendor=0x106b subdevice=0x1800
vendor = "Apple Inc."
device = "ANS2 NVMe Controller"
class = mass storage
bar [10] = type Prefetchable Memory, range 64, base 0xc0400000,
size 419304, enabled
bar [18] = type Prefetchable Memory, range 64, base 0xc1400000,
size 524288, enabled
bar [20] = type Prefetchable Memory, range 64, base 0xc1600000,
size 65536, enabled
cap 01[40] = powerspec 3 supports D0 D3 current D0
cap 05[50] = MSI supports 8 messages, 64 bit
cap 10[70] = PCI-Express 2 endpoint max data 256(256) RO NS
link x4(x4) speed 8.0(8.0) ASPM L1(L1) ClockPM enabled
ecap 0001[100] = AER 2 0 fatal 0 non-fatal 1 corrected
ecap 0019[148] = PCIe Sec 1 lane errors 0
ecap 0018[168] = LTR 1
ecap 001e[170] = L1 PM Substated 1
ecap 000b[180] = Vendor [1] ID 0002 Rev 1 Length 256
ecap 0015[280] = Resizable BAR 1
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