Hi All:
I'm a new pci/pcie developer, and trying to enable the pcie rc host on
the arm platform.
Up to now,
* the cfg space of target pcie device can be accessed, and the link
between host and target is set up.
* the target pcie device (intel 4965AGN wifi card) had been scanned
and allocated the mem resource
But the wifi driver can't access the pcie target device's mem resource.
System is halt when wifi driver accesses the pcie target device's mem address.
The memory layout of the pcie host:
* 0x0100_0000 --- 0x0100_FFFF 64KB IORESOURCE_IO
* 0x0101_0000 --- 0x01FE_FFFF 16MB - 128KB IORESOURCE_MEM
* 0x01FF_0000 --- 0x01FF_FFFF 64KB Cfg + Registers
Can anyone help me to analysis this situation?
Any suggestions and advices are appriciated.
here are the logs:
---------------------------------Log-------------------------------------------------
root@freescale ~$ lspci
00:00.0 Network controller: Intel Corporation Unknown device 4229 (rev 61)
root@freescale ~$ lspci -vv
00:00.0 Network controller: Intel Corporation Unknown device 4229 (rev 61)
Subsystem: Intel Corporation Unknown device 1100
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr+ Stepping- SERR+ FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 152
Region 0: Memory at 01010000 (64-bit, non-prefetchable) [size=8K]
Capabilities: [c8] Power Management version 3
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+
Queue=0/0 Enable-
Address: 0000000000000000 Data: 0000
Capabilities: [e0] Express Endpoint IRQ 0
Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag-
Device: Latency L0s <512ns, L1 unlimited
Device: AtnBtn- AtnInd- PwrInd-
Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported-
Device: RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
Device: MaxPayload 128 bytes, MaxReadReq 128 bytes
Link: Supported Speed 2.5Gb/s, Width x1, ASPM L0s L1, Port 4
Link: Latency L0s <128ns, L1 <64us
Link: ASPM Disabled RCB 64 bytes CommClk- ExtSynch-
Link: Speed 2.5Gb/s, Width x1
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Device Serial Number d5-af-73-ff-ff-5c-21-00
root@freescale ~$ cat /proc/ioports
01000000-0100ffff : PCIe 0 I/O
root@freescale ~$ cat /proc/iomem
...
01010000-01feffff : PCIe 0 MEM
01010000-01011fff : 0000:00:00.0
01010000-01011fff : iwlagn
...
pcie target 4965agn wifi card mem remap log:
---------------------------------------------------------------------------------
iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:d
iwlagn: Copyright(c) 2003-2010 Intel Corporation
iwlagn: *** LOAD DRIVER ***
iwlagn: BT channel inhibition is On
PCI: enabling device 0000:00:00.0 (0140 -> 0142)
pci_iomap entering, start 0x01010000, len 0x00002000
iwlagn: pci_resource_len = 0x00002000
iwlagn: pci_resource_base = ea9b0000
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
