edgetpu: Install M.2 Edge (B+M) TPU (not detected)

HI, I’m trying to get this working on my Ezbook 3 Pro I installed the M.2 Accelerator B+M key type but doesn’t seem to be detected I’m stuck on step 5 & 6 for this instruction

https://coral.ai/docs/m2/get-started/#2a-on-linux

Typing this lspci -nn | grep 089a

Does not give me any results

ls /dev/apex_0
ls: cannot access '/dev/apex_0': No such file or directory

uname -a
Linux debian 4.19.0-17-amd64 #1 SMP Debian 4.19.194-3 (2021-07-18) x86_64 GNU/Linux

modinfo gasket

filename:       /lib/modules/4.19.0-17-amd64/updates/dkms/gasket.ko
author:         Rob Springer <rspringer@google.com>
license:        GPL v2
version:        1.1.4
description:    Google Gasket driver framework
srcversion:     A7A1F644810CD4FF575450E
depends:
retpoline:      Y
name:           gasket
vermagic:       4.19.0-17-amd64 SMP mod_unload modversions
parm:           dma_bit_mask:int
root@debian:/home/pi# modinfo apex
filename:       /lib/modules/4.19.0-17-amd64/updates/dkms/apex.ko
author:         John Joseph <jnjoseph@google.com>
license:        GPL v2
version:        1.2
description:    Google Apex driver
srcversion:     37A768932BDAF006DA92150
alias:          pci:v00001AC1d0000089Asv*sd*bc*sc*i*
depends:        gasket
retpoline:      Y
name:           apex
vermagic:       4.19.0-17-amd64 SMP mod_unload modversions
parm:           allow_power_save:int
parm:           allow_sw_clock_gating:int
parm:           allow_hw_clock_gating:int
parm:           bypass_top_level:int
parm:           trip_point0_temp:int
parm:           trip_point1_temp:int
parm:           trip_point2_temp:int
parm:           hw_temp_warn1:int
parm:           hw_temp_warn2:int
parm:           hw_temp_warn1_en:bool
parm:           hw_temp_warn2_en:bool
parm:           temp_poll_interval:int

lspci

00:00.0 Host bridge: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series Host Bridge (rev 0b)
00:00.1 Signal processing controller: Intel Corporation Device 5a8c (rev 0b)
00:02.0 VGA compatible controller: Intel Corporation Device 5a85 (rev 0b)
00:03.0 Multimedia controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series Imaging Unit (rev 0b)
00:0e.0 Multimedia audio controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series Audio Cluster (rev 0b)
00:0f.0 Communication controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series Trusted Execution Engine (rev 0b)
00:12.0 SATA controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series SATA AHCI Controller (rev 0b)
00:14.0 PCI bridge: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series PCI Express Port B #2 (rev fb)
00:15.0 USB controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series USB xHCI (rev 0b)
00:16.0 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series I2C Controller #1 (rev 0b)
00:16.1 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series I2C Controller #2 (rev 0b)
00:16.2 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series I2C Controller #3 (rev 0b)
00:16.3 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series I2C Controller #4 (rev 0b)
00:17.0 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series I2C Controller #5 (rev 0b)
00:17.1 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series I2C Controller #6 (rev 0b)
00:17.2 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series I2C Controller #7 (rev 0b)
00:17.3 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series I2C Controller #8 (rev 0b)
00:18.0 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series HSUART Controller #1 (rev 0b)
00:18.1 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series HSUART Controller #2 (rev 0b)
00:18.2 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series HSUART Controller #3 (rev 0b)
00:18.3 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series HSUART Controller #4 (rev 0b)
00:19.0 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series SPI Controller #1 (rev 0b)
00:19.1 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series SPI Controller #2 (rev 0b)
00:19.2 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series SPI Controller #3 (rev 0b)
00:1b.0 SD Host controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series SDXC/MMC Host Controller (rev 0b)
00:1c.0 SD Host controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series eMMC Controller (rev 0b)
00:1e.0 SD Host controller: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series SDIO Controller (rev 0b)
00:1f.0 ISA bridge: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series Low Pin Count Interface (rev 0b)
00:1f.1 SMBus: Intel Corporation Atom/Celeron/Pentium Processor N4200/N3350/E3900 Series SMBus Controller (rev 0b)
01:00.0 Network controller: Intel Corporation Wireless 3165 (rev 81)

modinfo apex

filename:       /lib/modules/4.19.0-17-amd64/updates/dkms/apex.ko
author:         John Joseph <jnjoseph@google.com>
license:        GPL v2
version:        1.2
description:    Google Apex driver
srcversion:     37A768932BDAF006DA92150
alias:          pci:v00001AC1d0000089Asv*sd*bc*sc*i*
depends:        gasket
retpoline:      Y
name:           apex
vermagic:       4.19.0-17-amd64 SMP mod_unload modversions
parm:           allow_power_save:int
parm:           allow_sw_clock_gating:int
parm:           allow_hw_clock_gating:int
parm:           bypass_top_level:int
parm:           trip_point0_temp:int
parm:           trip_point1_temp:int
parm:           trip_point2_temp:int
parm:           hw_temp_warn1:int
parm:           hw_temp_warn2:int
parm:           hw_temp_warn1_en:bool
parm:           hw_temp_warn2_en:bool
parm:           temp_poll_interval:int

About this issue

Original URL
State: closed
Created 3 years ago
Comments: 24

Most upvoted comments

Maybe secure boot related, see https://askubuntu.com/questions/762254/why-do-i-get-required-key-not-available-when-install-3rd-party-kernel-modules

Ding ding ding! Winner winner chicken dinner. This fixed it. THANK YOU!

agrieco on Sep 22, 2021

Maybe secure boot related, see https://askubuntu.com/questions/762254/why-do-i-get-required-key-not-available-when-install-3rd-party-kernel-modules

pdecat on Sep 22, 2021

Maybe secure boot related, see https://askubuntu.com/questions/762254/why-do-i-get-required-key-not-available-when-install-3rd-party-kernel-modules

Maybe secure boot related, see https://askubuntu.com/questions/762254/why-do-i-get-required-key-not-available-when-install-3rd-party-kernel-modules

Ding ding ding! Winner winner chicken dinner. This fixed it. THANK YOU!

I can also confirm this works!!! @pdecat Thank you

rafaelmathieu on Sep 23, 2021

Hi, on my working setup I have this:

# lspci -vv -d 1ac1:089a
00:0c.0 System peripheral: Device 1ac1:089a (prog-if ff)
        Subsystem: Device 1ac1:089a
        Physical Slot: 12
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 32 bytes
        Interrupt: pin A routed to IRQ 10
        Region 0: Memory at fea1c000 (64-bit, prefetchable) [size=16K]
        Region 2: Memory at fe800000 (64-bit, prefetchable) [size=1M]
        Capabilities: [80] Express (v2) Endpoint, MSI 00
                DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
                        ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 26.000W
                DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
                        RlxdOrd- ExtTag+ PhantFunc- AuxPwr- NoSnoop+
                        MaxPayload 256 bytes, MaxReadReq 512 bytes
                DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
                LnkCap: Port #1, Speed 5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us
                        ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
                LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk-
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
                DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR+, OBFF Not Supported
                DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled
                LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1-
                         EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-
        Capabilities: [d0] MSI-X: Enable+ Count=128 Masked-
                Vector table: BAR=2 offset=00046800
                PBA: BAR=2 offset=00046068
        Capabilities: [e0] MSI: Enable- Count=1/32 Maskable- 64bit+
                Address: 0000000000000000  Data: 0000
        Capabilities: [f8] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
        Kernel driver in use: apex
        Kernel modules: apex

00:0d.0 System peripheral: Device 1ac1:089a (prog-if ff)
        Subsystem: Device 1ac1:089a
        Physical Slot: 13
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 32 bytes
        Interrupt: pin A routed to IRQ 10
        Region 0: Memory at fea20000 (64-bit, prefetchable) [size=16K]
        Region 2: Memory at fe900000 (64-bit, prefetchable) [size=1M]
        Capabilities: [80] Express (v2) Endpoint, MSI 00
                DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
                        ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 26.000W
                DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
                        RlxdOrd- ExtTag+ PhantFunc- AuxPwr- NoSnoop+
                        MaxPayload 256 bytes, MaxReadReq 512 bytes
                DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
                LnkCap: Port #1, Speed 5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us
                        ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
                LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk-
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
                DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR+, OBFF Not Supported
                DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled
                LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1-
                         EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-
        Capabilities: [d0] MSI-X: Enable+ Count=128 Masked-
                Vector table: BAR=2 offset=00046800
                PBA: BAR=2 offset=00046068
        Capabilities: [e0] MSI: Enable- Count=1/32 Maskable- 64bit+
                Address: 0000000000000000  Data: 0000
        Capabilities: [f8] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
        Kernel driver in use: apex
        Kernel modules: apex

The most notable difference being I have Kernel driver in use: apex and you do not.

What happens when you try to load the driver with modprobe?

You can check if the drivers are loaded with lsmod, e.g.:

# lsmod | grep apex
apex                   20480  0
gasket                106496  1 apex

pdecat on Sep 22, 2021

@ferbulous most likely your m.2 slot is SATA, not PCIe. m.2 specification allows both PCIe and SATA at the same form factor and keying

I see, is there way I can verify that on the device?

You can check specs of your laptop if it clearly says NVMe or SATA.

Alternatively, take a look at m.2 pinout and traces on PCB. PCIe implementation has RefClk differential pair at pins 53 and 55

magic-blue-smoke on Aug 2, 2021