Hello!
I've seen this problem reported many times, but it's the first time I
can reproduce it on my machine.
I'm using a system with Intel Q6600 CPU and 4Gb of memory running a
x86_64 Fedora 10 with a custom compiled kernel from the current
wireless-testing repository (it's Linux 2.6.29-rc4 with the latest
wireless stuff).
I have a Ricoh PCMCIA/CardBus adapter in a PCI slot. No CardBus cards
inserted into the adapter work. In particular, an Atheros 5416 card
supported by ath9k is not working, nor do any other Atheros cards
supported by ath5k. It turns out, the cards are forced to use memory
beyond the first 4Gb of RAM. From /proc/iomem (full copy is below):
100000000-12fffffff : System RAM
130000000-133ffffff : PCI CardBus 0000:04
130000000-13000ffff : 0000:04:00.0
ath9k allocates its resources with the following calls (omitting error
handling):
ret = pci_request_region(pdev, 0, "ath9k");
mem = pci_iomap(pdev, 0, 0);
I don't see how the driver could be doing anything wrong. I believe
CardBus devices simply don't understand addresses beyond the first 4
gigabytes.
It turns out the CardBus device gets another region:
d8000000-dbffffff : PCI CardBus 0000:04
However, the ath9k resources are not allocated there. I know some Ricoh
adapters have two slots, but this resource must be for the same slot,
since it's also bus 4.
I have found a workaround. If I add "pci=cbmemsize=32M" to the kernel
command line, all PCI resources are under 4Gb and everything works:
d8000000-d9ffffff : PCI CardBus 0000:04
da000000-dbffffff : PCI CardBus 0000:04
da000000-da00ffff : 0000:04:00.0
da000000-da00ffff : ath9k
The problem exists with "pci=cbmemsize=64M" (64M is the default). From
the kernel log:
[ 0.916567] pci 0000:03:01.0: CardBus bridge, secondary bus 0000:04
[ 0.916611] pci 0000:03:01.0: IO window: 0x00e000-0x00e0ff
[ 0.916656] pci 0000:03:01.0: IO window: 0x00e400-0x00e4ff
[ 0.916701] pci 0000:03:01.0: PREFETCH window: 0xd8000000-0xdbffffff
[ 0.916747] pci 0000:03:01.0: MEM window: 0x130000000-0x133ffffff
$ cat /proc/iomem
00000000-0000ffff : reserved
00010000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000c0000-000cffff : pnp 00:0e
000e0000-000fffff : reserved
00100000-cff9ffff : System RAM
00200000-005cbc05 : Kernel code
005cbc06-0077277f : Kernel data
007f6000-008975cf : Kernel bss
cffa0000-cffadfff : ACPI Tables
cffae000-cffeffff : ACPI Non-volatile Storage
cfff0000-cfffdfff : reserved
d0000000-d7ffffff : PCI Bus 0000:01
d0000000-d3ffffff : 0000:01:00.0
d0000000-d3ffffff : radeonfb framebuffer
d8000000-dbffffff : PCI CardBus 0000:04
dcf00000-deffffff : PCI Bus 0000:03
dcfff000-dcffffff : 0000:03:02.0
dcfff000-dcffffff : orinoco_pci
dfffbc00-dfffbfff : 0000:00:1d.7
dfffbc00-dfffbfff : ehci_hcd
dfffc000-dfffffff : 0000:00:1b.0
dfffc000-dfffffff : ICH HD audio
e0000000-efffffff : PCI MMCONFIG 0
e0000000-efffffff : pnp 00:0d
f0000000-fe2fffff : PCI Bus 0000:01
f0000000-f000ffff : 0000:01:00.0
f0000000-f000ffff : radeonfb mmio
fe2d0000-fe2dffff : 0000:01:00.1
fe2e0000-fe2fffff : 0000:01:00.0
fe300000-fe3fffff : PCI Bus 0000:02
fe3c0000-fe3dffff : 0000:02:00.0
fe3ff000-fe3fffff : 0000:02:00.0
fe3ff000-fe3fffff : r8169
fe400000-febfffff : PCI Bus 0000:03
fe400000-fe400fff : 0000:03:01.0
fe400000-fe400fff : yenta_socket
fec00000-fec00fff : IOAPIC 0
fec00000-fec00fff : pnp 00:0c
fed00000-fed003ff : HPET 0
fed14000-fed19fff : pnp 00:01
fed1c000-fed1ffff : pnp 00:08
fed20000-fed8ffff : pnp 00:08
fee00000-fee00fff : Local APIC
fee00000-fee00fff : reserved
fee00000-fee00fff : pnp 00:0c
ffb80000-ffffffff : reserved
ffc00000-fff7ffff : pnp 00:0b
100000000-12fffffff : System RAM
130000000-133ffffff : PCI CardBus 0000:04
$ lspci
00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller (rev 10)
00:01.0 PCI bridge: Intel Corporation 82G33/G31/P35/P31 Express PCI Express Root Port (rev 10)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family) SATA IDE Controller (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
01:00.0 VGA compatible controller: ATI Technologies Inc RV370 5B60 [Radeon X300 (PCIE)]
01:00.1 Display controller: ATI Technologies Inc RV370 [Radeon X300SE]
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 01)
03:01.0 CardBus bridge: Ricoh Co Ltd RL5c475 (rev 81)
03:02.0 Network controller: Intersil Corporation Prism 2.5 Wavelan chipset (rev 01)
04:00.0 Network controller: Atheros Communications Inc. AR5008 Wireless Network Adapter (rev 01)
$ lspci -v -s 03:01.0
03:01.0 CardBus bridge: Ricoh Co Ltd RL5c475 (rev 81)
Flags: bus master, medium devsel, latency 168, IRQ 18
Memory at fe400000 (32-bit, non-prefetchable) [size=4K]
Bus: primary=03, secondary=04, subordinate=07, sec-latency=176
Memory window 0: d8000000-dbfff000 (prefetchable)
Memory window 1: 30000000-33fff000
I/O window 0: 0000e000-0000e0ff
I/O window 1: 0000e400-0000e4ff
16-bit legacy interface ports at 0001
Kernel driver in use: yenta_cardbus
Memory window 1 is shown incorrectly!
--
Regards,
Pavel Roskin
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