Hi,
On Wed, May 18, 2011 at 7:44 PM, Bjorn Helgaas <bhelgaas at google.com> wrote:
> On Wed, May 18, 2011 at 4:02 AM, Prashant Bhole
> <prashantsmailcenter at gmail.com> wrote:
>> On Mon, May 2, 2011 at 10:21 AM, Prashant Bhole
>> <prashantsmailcenter at gmail.com> wrote:
>>>
>>> Hi,
>>> I have a custom made powerpc 460EX board. On that board u-boot
>>> can see a PCI device but Linux kernel cannot see it. What could be the problem?
>>>
>>> On u-boot "pci 2" commands displays following device:
>>> Scanning PCI devices on bus 2
>>> BusDevFun VendorId DeviceId Device Class Sub-Class
>>> _____________________________________________________________
>>> 02.00.00 0x1000 0x0072 Mass storage controller 0x00
>>>
>>> And when the kernel is booted, there is only one pci device (bridge):
>>> #ls /sys/bus/pci/devices
>>> 0000:80:00.0
>>>
>>
>> I am still facing in this problem.
>>
>> a call to pci_bus_read_config_dword(bus, devfn, PCI_VENDOR_ID, &l) returns
>> positive value in the function pci_scan_device(), which means VENDOR_ID reading
>> failed. I could not find the reason. Any hints?
>
> Hmm... probably powerpc-related, so I added linuxppc-dev.
>
> My guess would be that Linux didn't find the host bridge to the
> hierarchy containing bus 2. I would guess the host bridge info is
> supposed to come from OF. More information, like the complete u-boot
> PCI scan and the kernel dmesg log, would be useful. And maybe u-boot
> has a way to dump the OF device tree?
>
I am not using OF for booting u-boot. OF is being used for booting the kernel.
Not sure whether the host bridge info is coming from OF.
Device tree has two pciex nodes with following property:
compatible = "ibm,plb-pciex-460ex", "ibm,plb-pciex"
I think that node represents a pciex bus not the bridge.
I have attached u-boot, dmesg logs and device tree source
-Prashant
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460ex #dmesg
<6>Using PowerPC 44x Platform machine description
<4>Only using first contiguous memory region
<5>Linux version 2.6.38.4 (root at stripe) (gcc version 4.3.4 (Buildroot 2010.02) ) #12 Thu May 19 16:51:17 IST 2011
<4>Found initrd at 0xefdff000:0xeffffc24
<7>Found legacy serial port 0 for /plb/opb/serial at ef600300
<7> mem=4ef600300, taddr=4ef600300, irq=0, clk=7407407, speed=0
<7>Found legacy serial port 1 for /plb/opb/serial at ef600400
<7> mem=4ef600400, taddr=4ef600400, irq=0, clk=7407407, speed=0
<7>Found legacy serial port 2 for /plb/opb/serial at ef600500
<7> mem=4ef600500, taddr=4ef600500, irq=0, clk=7407407, speed=0
<7>Found legacy serial port 3 for /plb/opb/serial at ef600600
<7> mem=4ef600600, taddr=4ef600600, irq=0, clk=7407407, speed=0
<7>Top of RAM: 0x30000000, Total RAM: 0x30000000
<7>Memory hole size: 0MB
<4>Zone PFN ranges:
<4> DMA 0x00000000 -> 0x00030000
<4> Normal empty
<4>Movable zone start PFN for each node
<4>early_node_map[1] active PFN ranges
<4> 0: 0x00000000 -> 0x00030000
<7>On node 0 totalpages: 196608
<7>free_area_init_node: node 0, pgdat c033b628, node_mem_map c045e000
<7> DMA zone: 1536 pages used for memmap
<7> DMA zone: 0 pages reserved
<7> DMA zone: 195072 pages, LIFO batch:31
<6>MMU: Allocated 1088 bytes of context maps for 255 contexts
<7>pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
<7>pcpu-alloc: [0] 0
<4>Built 1 zonelists in Zone order, mobility grouping on. Total pages: 195072
<5>Kernel command line: root=/dev/ram rw console=ttyS0,115200
<6>PID hash table entries: 4096 (order: 2, 16384 bytes)
<6>Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
<6>Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
<6>Memory: 772860k/786432k available (3240k kernel code, 13572k reserved, 100k data, 1127k bss, 160k init)
<6>Kernel virtual memory layout:
<6> * 0xfffdf000..0xfffff000 : fixmap
<6> * 0xfde00000..0xfe000000 : consistent mem
<6> * 0xfde00000..0xfde00000 : early ioremap
<6> * 0xf1000000..0xfde00000 : vmalloc & ioremap
<6>SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
<6>NR_IRQS:512 nr_irqs:512 16
<4>UIC0 (32 IRQ sources) at DCR 0xc0
<4>UIC1 (32 IRQ sources) at DCR 0xd0
<7>irq: irq 30 on host /interrupt-controller0 mapped to virtual irq 30
<4>UIC2 (32 IRQ sources) at DCR 0xe0
<7>irq: irq 10 on host /interrupt-controller0 mapped to virtual irq 16
<4>UIC3 (32 IRQ sources) at DCR 0xf0
<7>irq: irq 16 on host /interrupt-controller0 mapped to virtual irq 17
<7>time_init: decrementer frequency = 1000.000012 MHz
<7>time_init: processor frequency = 1000.000012 MHz
<6>clocksource: timebase mult[400000] shift[22] registered
<7>clockevent: decrementer mult[80000019] shift[31] cpu[0]
<6>pid_max: default: 32768 minimum: 301
<4>Mount-cache hash table entries: 512
<6>NET: Registered protocol family 16
<7>irq: irq 11 on host /interrupt-controller1 mapped to virtual irq 18
<6>256k L2-cache enabled
<6>PCIE0: Port disabled via device-tree
<6>PCIE1: Checking link...
<6>PCIE1: Device detected, waiting for link...
<6>PCIE1: link is up !
<6>PCI host bridge /plb/pciex at d20000000 (primary) ranges:
<6> MEM 0x0000000e80000000..0x0000000effffffff -> 0x0000000080000000
<6> MEM 0x0000000f00100000..0x0000000f001fffff -> 0x0000000000000000
<6> IO 0x0000000f80010000..0x0000000f8001ffff -> 0x0000000000000000
<6> Removing ISA hole at 0x0000000f00100000
<6>4xx PCI DMA offset set to 0x00000000
<6>/plb/pciex at d20000000: Legacy ISA memory support enabled
<6>PCIE1: successfully set as root-complex
<6>PCI host bridge /plb/pci at c0ec00000 (primary) ranges:
<6> MEM 0x0000000d80000000..0x0000000dffffffff -> 0x0000000080000000
<6> MEM 0x0000000c0ee00000..0x0000000c0eefffff -> 0x0000000000000000
<6> IO 0x0000000c08000000..0x0000000c0800ffff -> 0x0000000000000000
<6> Removing ISA hole at 0x0000000c0ee00000
<6>4xx PCI DMA offset set to 0x00000000
<6>/plb/pci at c0ec00000: Legacy ISA memory support enabled
<6>PCI: Probing PCI hardware
<7>pci_bus 0000:80: scanning bus
<7>pci 0000:80:00.0: [aaa1:bed1] type 1 class 0x000604
<7>pci 0000:80:00.0: calling quirk_mmio_always_on+0x0/0x24
<7>pci 0000:80:00.0: reg 10: [mem 0x00000000-0x7fffffff pref]
<7>pci 0000:80:00.0: calling pcibios_fixup_resources+0x0/0x174
<7>pci 0000:80:00.0: calling fixup_ppc4xx_pci_bridge+0x0/0x134
<6>PCI: Hiding 4xx host bridge resources 0000:80:00.0
<7>pci 0000:80:00.0: calling quirk_resource_alignment+0x0/0x1e0
<7>pci_bus 0000:80: fixups for bus
<7>pci 0000:80:00.0: scanning [bus 81-bf] behind bridge, pass 0
<7>pci_bus 0000:81: scanning bus
<7>pci_bus 0000:81: fixups for bus
<6>pci 0000:80:00.0: PCI bridge to [bus 81-bf]
<7>pci 0000:80:00.0: bridge window [io 0x0000-0x0000] (disabled)
<7>pci 0000:80:00.0: bridge window [mem 0xb8000000-0xb80fffff]
<7>pci 0000:80:00.0: bridge window [mem 0x10000000-0x000fffff pref] (disabled)
<7>pci_bus 0000:81: bus scan returning with max=81
<7>pci 0000:80:00.0: scanning [bus 81-bf] behind bridge, pass 1
<7>pci_bus 0000:80: bus scan returning with max=bf
<7>pci_bus 0001:00: scanning bus
<7>pci_bus 0001:00: fixups for bus
<7>pci_bus 0001:00: bus scan returning with max=00
<6>pci 0000:80:00.0: PCI bridge to [bus 81-bf]
<6>pci 0000:80:00.0: bridge window [io disabled]
<6>pci 0000:80:00.0: bridge window [mem disabled]
<6>pci 0000:80:00.0: bridge window [mem pref disabled]
<7>pci_bus 0000:80: resource 0 [io 0xfffe0000-0xfffeffff]
<7>pci_bus 0000:80: resource 1 [mem 0xe80000000-0xeffffffff]
<7>pci_bus 0001:00: resource 0 [io 0x0000-0xffff]
<7>pci_bus 0001:00: resource 1 [mem 0xd80000000-0xdffffffff]
<4>bio: create slab <bio-0> at 0
<6>vgaarb: loaded
<5>SCSI subsystem initialized
<6>Switching to clocksource timebase
<6>NET: Registered protocol family 2
<6>IP route cache hash table entries: 32768 (order: 5, 131072 bytes)
<6>TCP established hash table entries: 131072 (order: 8, 1048576 bytes)
<6>Switched to NOHz mode on CPU #0
<6>TCP bind hash table entries: 65536 (order: 6, 262144 bytes)
<6>TCP: Hash tables configured (established 131072 bind 65536)
<6>TCP reno registered
<6>UDP hash table entries: 512 (order: 1, 8192 bytes)
<6>UDP-Lite hash table entries: 512 (order: 1, 8192 bytes)
<6>NET: Registered protocol family 1
<6>RPC: Registered udp transport module.
<6>RPC: Registered tcp transport module.
<6>RPC: Registered tcp NFSv4.1 backchannel transport module.
<7>pci 0000:80:00.0: calling quirk_cardbus_legacy+0x0/0x50
<7>pci 0000:80:00.0: calling quirk_usb_early_handoff+0x0/0x714
<7>PCI: CLS 32 bytes, default 32
<6>Trying to unpack rootfs image as initramfs...
<6>rootfs image is not initramfs (no cpio magic); looks like an initrd
<4>Freeing initrd memory: 2051k freed
<7>irq: irq 1 on host /interrupt-controller1 mapped to virtual irq 19
<7>irq: irq 1 on host /interrupt-controller0 mapped to virtual irq 20
<7>irq: irq 29 on host /interrupt-controller1 mapped to virtual irq 29
<7>irq: irq 30 on host /interrupt-controller1 mapped to virtual irq 21
<7>irq: irq 29 on host /interrupt-controller0 mapped to virtual irq 22
<7>irq: irq 6 on host /interrupt-controller2 mapped to virtual irq 23
<7>irq: irq 7 on host /interrupt-controller2 mapped to virtual irq 24
<7>irq: irq 3 on host /interrupt-controller2 mapped to virtual irq 25
<7>irq: irq 4 on host /interrupt-controller2 mapped to virtual irq 26
<7>irq: irq 5 on host /interrupt-controller2 mapped to virtual irq 27
<7>irq: irq 22 on host /interrupt-controller0 mapped to virtual irq 28
<7>irq: irq 21 on host /interrupt-controller0 mapped to virtual irq 31
<7>irq: irq 22 on host /interrupt-controller1 mapped to virtual irq 32
<7>irq: irq 6 on host /interrupt-controller1 mapped to virtual irq 33
<7>irq: irq 0 on host /interrupt-controller1 mapped to virtual irq 34
<7>irq: irq 18 on host /interrupt-controller0 mapped to virtual irq 35
<7>irq: irq 9 on host /interrupt-controller0 mapped to virtual irq 36
<7>irq: irq 20 on host /interrupt-controller3 mapped to virtual irq 37
<7>irq: irq 21 on host /interrupt-controller3 mapped to virtual irq 38
<7>irq: irq 21 on host /interrupt-controller1 mapped to virtual irq 39
<7>irq: irq 20 on host /interrupt-controller1 mapped to virtual irq 40
<7>irq: irq 2 on host /interrupt-controller2 mapped to virtual irq 41
<7>irq: irq 2 on host /interrupt-controller0 mapped to virtual irq 42
<7>irq: irq 3 on host /interrupt-controller0 mapped to virtual irq 43
<7>irq: irq 16 on host /interrupt-controller2 mapped to virtual irq 44
<7>irq: irq 20 on host /interrupt-controller2 mapped to virtual irq 45
<7>irq: irq 17 on host /interrupt-controller2 mapped to virtual irq 46
<7>irq: irq 21 on host /interrupt-controller2 mapped to virtual irq 47
<7>irq: irq 0 on host /interrupt-controller0 mapped to virtual irq 48
<3>setting trigger mode 3 for irq 42 failed (compat_irq_set_type+0x0/0x30)
<3>setting trigger mode 3 for irq 42 failed (compat_irq_set_type+0x0/0x30)
<6>ROMFS MTD (C) 2007 Red Hat, Inc.
<6>msgmni has been set to 1515
<6>Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)
<6>io scheduler noop registered
<6>io scheduler deadline registered
<6>io scheduler cfq registered (default)
<6>pci_hotplug: PCI Hot Plug PCI Core version: 0.5
<6>Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
<6>serial8250.0: ttyS0 at MMIO 0x4ef600300 (irq = 19) is a U6_16550A
<6>console [ttyS0] enabled
<6>serial8250.0: ttyS1 at MMIO 0x4ef600400 (irq = 20) is a U6_16550A
<6>serial8250.0: ttyS2 at MMIO 0x4ef600500 (irq = 29) is a U6_16550A
<6>serial8250.0: ttyS3 at MMIO 0x4ef600600 (irq = 21) is a U6_16550A
<6>4ef600300.serial: ttyS0 at MMIO 0x4ef600300 (irq = 19) is a 16550
<6>4ef600400.serial: ttyS1 at MMIO 0x4ef600400 (irq = 20) is a 16550
<6>4ef600500.serial: ttyS2 at MMIO 0x4ef600500 (irq = 29) is a 16550
<6>4ef600600.serial: ttyS3 at MMIO 0x4ef600600 (irq = 21) is a 16550
<6>brd: module loaded
<6>mpt2sas version 07.100.00.00 loaded
<6>PPC 4xx OCP EMAC driver, version 3.54
<6>MAL v2 /plb/mcmal, 2 TX channels, 16 RX channels
<6>ZMII /plb/opb/emac-zmii at ef600d00 initialized
<6>RGMII /plb/opb/emac-rgmii at ef601500 initialized with MDIO support
<6>TAH /plb/opb/emac-tah at ef601350 initialized
<6>TAH /plb/opb/emac-tah at ef601450 initialized
<5>/plb/opb/emac-rgmii at ef601500: input 0 in RGMII mode
<6>eth0: EMAC-0 /plb/opb/ethernet at ef600e00, MAC 12:34:56:78:cc:dd
<4>eth0: found Generic MII PHY (0x00)
<5>/plb/opb/emac-rgmii at ef601500: input 1 in RGMII mode
<6>eth1: EMAC-1 /plb/opb/ethernet at ef600f00, MAC 12:34:56:78:dc:dd
<4>eth1: found Generic MII PHY (0x01)
<6>i2c /dev entries driver
<6>of:ibm-iic 4ef600700.i2c: using standard (100 kHz) mode
<7>irq: irq 25 on host /interrupt-controller2 mapped to virtual irq 49
<6>rtc-m41t80 0-0068: chip found, driver version 0.05
<6>rtc-m41t80 0-0068: rtc core: registered m41t80 as rtc0
<6>of:ibm-iic 4ef600800.i2c: using standard (100 kHz) mode
<6>ad7414 0-0048: chip found
<4>ad7414 0-0048: ad7414_probe unable to read config register.
<6>TCP cubic registered
<6>NET: Registered protocol family 17
<6>rtc-m41t80 0-0068: setting system clock to 2071-09-15 11:14:52 UTC (3209541292)
<5>RAMDISK: gzip image found at block 0
<4>VFS: Mounted root (romfs filesystem) readonly on device 1:0.
<4>Freeing unused kernel memory: 160k init
<6>eth0: link is down
<6>eth1: link is down
<6>eth0: link is up, 100 FDX, pause enabled
460ex #
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U-Boot 2009.08 (Apr 08 2011 - 18:08:03)
CPU: AMCC PowerPC 460EX Rev. B at 1000 MHz (PLB=200, OPB=100, EBC=100 MHz)
Security/Kasumi support
Bootstrap Option H - Boot ROM Location I2C (Addr 0x52)
Internal PCI arbiter disabled
32 kB I-Cache 32 kB D-Cache
Board: Canyonlands - AMCC PPC460EX Evaluation Board, 1*PCIe/1*SATA, Rev. 0
I2C: ready
DRAM: 1 GB (ECC not enabled, 400 MHz, CL3)
I2C channel 1 test:
SDRAM channel: OK
AT24C02 channel: OK
RTC channel: OK
W83793 channel: OK
FLASH: 8 MB
NAND: 256 MiB
PCI: Bus Dev VenId DevId Class Int
PCIE1: successfully set as root-complex
02 00 1000 0072 0100 00
DTT: 1 FAILED INIT
Net: ppc_4xx_eth0, ppc_4xx_eth1
Type run flash_nfs to mount root filesystem over NFS
Hit any key to stop autoboot: 5
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