altera_dma driver for PCIe

Hi eapenabrm,

Thank you for the tips! Unfortunately, none of these two Device ID's work for me .

I found that

$ lspci -vv | grep Altera -A 10
01:00.0 Non-VGA unclassified device: Altera Corporation Device e003 (rev 01)
	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-
	Interrupt: pin A routed to IRQ 0
	Region 0: Memory at <unassigned> (64-bit, prefetchable)  
	Region 4: Memory at <unassigned> (64-bit, prefetchable)  

As shown, the two memory blocks are unassigned (and disabled?).

Could this be related to the dmesg error message "altera_dma: module verification failed: signature and/or required key missing - tainting kernel"?

Also, I looked into the system device tree, I can see the device at /sys/bus/pci/devices/0000:01:00.0.

Under the folder of that device I can see the

$ ls /sys/bus/pci/devices/0000\:01\:00.0
broken_parity_status      device           irq            numa_node  resource      subsystem
class                     dma_mask_bits    local_cpulist  power      resource0     subsystem_device
config                    driver_override  local_cpus     remove     resource0_wc  subsystem_vendor
consistent_dma_mask_bits  enable           modalias       rescan     resource4     uevent
d3cold_allowed            firmware_node    msi_bus        reset      resource4_wc  vendor

, but if I do cat /proc/devices, I can't see altera_dma in the list.

Unfortunately, the altera_dma_load script tries to identify the major ID of the device from /proc/devices and mknod with that major ID, so it couldn't get pass this step.

At this point I feel like to issue was because of something in the driver, but I am not sure where exactly the problem is. Could you please give me some suggestion where I can look into further?

Any suggestion is much appreciated!!!