Hi,
On my custom MPC8536 based board running 2.6.31 kernel
FPGA is connected via x2 PCI-E lane. FPGA is identified
during PCI scan and is visible via lspci.
0000:01:00.0 Class ff00: Altera Corporation Unknown device 0004 (rev 01)
Subsystem: Altera Corporation Unknown device 0004
Flags: fast devsel, IRQ 16
Memory at 98000000 (32-bit, non-prefetchable) [disabled] [size=1M]
Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+
Queue=0/5 Enable-
Capabilities: [78] Power Management version 3
Capabilities: [80] Express Endpoint IRQ 0
Capabilities: [100] Virtual Channel
However when I attempt to access FPGA memory my mmapping it in userspace
the read hangs. The same happens in kernel space. Does it happen because
FPGA memory is marked as disabled, or because FPGA code is doing
something wrong ?
Another question is what can cause PCI device memory be marked as
disabled.
Thanks a lot.
Felix.
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