PCI memory reservation failure - 2.4/2.6

From: Alec H. Peterson
Date: Mon May 10 2004 - 08:08:50 EST

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Greetings,

Several users (myself included) have reported problems with PCI memory reservation failures when using Cardbus cards with certain PCMCIA bridge/motherboard configurations. I believe the problem stems from either the Cardbus controller or the motherboard BIOS not assigning large enough aligned blocks of memory to the Cardbus slots.

I am running on a Shuttle XPC (built in mainboard) with a Ricoh RL5C475 single slot PCMCIA/PCI bridge. The current kernel I am using is 2.4.25, but I have duplicated the problem in 2.4.26 as well as 2.6.5. The lspci -vv/iomem details (without the patched yenta_socket.o module) are attached.

The fix I propose is as follows:

*** linux-2.4.25/drivers/pcmcia/yenta.c.old Wed Feb 18 13:36:31 2004
--- linux-2.4.25/drivers/pcmcia/yenta.c Fri May 7 05:29:56 2004
***************
*** 753,758 ****
--- 753,767 ----

start = config_readl(socket, offset) & mask;
end = config_readl(socket, offset+4) | ~mask;
+ #if 1
+ if (!(type & IORESOURCE_IO) && (((end - start) < BRIDGE_SIZE_MIN) ||
+ (start & (end - start))))
+ {
+ printk(KERN_INFO "yenta %s: Preassigned resource start %lx end %lx too small or not aligned.\n", socket->dev->slot_name, start, end);
+ res->start = res->end = 0;
+ }
+ else
+ #endif
if (start && end > start) {
res->start = start;
res->end = end;

The yenta_allocate_res() routine has a variety of restrictions it places on memory it assigns itself (it must be >= BRIDGE_SIZE_MIN, <= BRIDGE_SIZE_MAX, and aligned based on its size). However, the routine does not place any such restrictions on memory it is assigned by the BIOS. This is probably the case because it is assumed that such memory will meet the restrictions, but at least in some cases (such as in my configuration) this is not the case. I believe this fix will have no affect on properly functioning BIOS, and it should do the right thing when the BIOS decides it does not need to allocate enough aligned memory.

However, my experience in the kernel is very limited, so I hope those who are far more versed in the details of the kernel than I will weigh in.

Thanks!

Alec

00:00.0 Host bridge: Silicon Integrated Systems [SiS]: Unknown device 0651 (rev 02)
Subsystem: Silicon Integrated Systems [SiS]: Unknown device 0651
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR-
Latency: 32
Region 0: Memory at e8000000 (32-bit, non-prefetchable) [size=64M]
Capabilities: [c0] AGP version 2.0
Status: RQ=31 SBA+ 64bit- FW+ Rate=x1,x2
Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>

00:01.0 PCI bridge: Silicon Integrated Systems [SiS] 5591/5592 AGP (prog-if 00 [Normal decode])
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: 64
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
I/O behind bridge: 00009000-00009fff
Memory behind bridge: ec000000-ec0fffff
Prefetchable memory behind bridge: e0000000-e7ffffff
BridgeCtl: Parity- SERR+ NoISA+ VGA+ MAbort- >Reset- FastB2B-

00:02.0 ISA bridge: Silicon Integrated Systems [SiS] 85C503/5513 (rev 14)
Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 0

00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (prog-if 8a [Master SecP PriP])
Subsystem: Silicon Integrated Systems [SiS] SiS5513 EIDE Controller (A,B step)
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 128
Interrupt: pin A routed to IRQ 10
Region 0: I/O ports at <ignored>
Region 1: I/O ports at <ignored>
Region 2: I/O ports at <ignored>
Region 3: I/O ports at <ignored>
Region 4: I/O ports at 4000 [size=16]
Capabilities: [58] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] SiS7012 PCI Audio Accelerator (rev a0)
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer: Unknown device c120
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (13000ns min, 2750ns max)
Interrupt: pin C routed to IRQ 11
Region 0: I/O ports at a000 [size=256]
Region 1: I/O ports at a400 [size=128]
Capabilities: [48] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=55mA PME(D0-,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:03.0 USB Controller: Silicon Integrated Systems [SiS] 7001 (rev 0f) (prog-if 10 [OHCI])
Subsystem: Silicon Integrated Systems [SiS] 7001
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (20000ns max), cache line size 08
Interrupt: pin A routed to IRQ 9
Region 0: Memory at ec100000 (32-bit, non-prefetchable) [size=4K]

00:03.1 USB Controller: Silicon Integrated Systems [SiS] 7001 (rev 0f) (prog-if 10 [OHCI])
Subsystem: Silicon Integrated Systems [SiS] 7001
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (20000ns max), cache line size 08
Interrupt: pin B routed to IRQ 5
Region 0: Memory at ec101000 (32-bit, non-prefetchable) [size=4K]

00:03.2 USB Controller: Silicon Integrated Systems [SiS] 7001 (rev 0f) (prog-if 10 [OHCI])
Subsystem: Silicon Integrated Systems [SiS] 7001
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (20000ns max), cache line size 08
Interrupt: pin C routed to IRQ 10
Region 0: Memory at ec102000 (32-bit, non-prefetchable) [size=4K]

00:03.3 USB Controller: Silicon Integrated Systems [SiS]: Unknown device 7002 (prog-if 20 [EHCI])
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer: Unknown device f451
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (20000ns max), cache line size 08
Interrupt: pin D routed to IRQ 11
Region 0: Memory at ec103000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0a.0 CardBus bridge: Texas Instruments PCI1420
Subsystem: CARRY Computer ENG. CO Ltd: Unknown device 0202
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 168, cache line size 08
Interrupt: pin A routed to IRQ 5
Region 0: Memory at ec104000 (32-bit, non-prefetchable) [size=4K]
Bus: primary=00, secondary=02, subordinate=02, sec-latency=176
Memory window 0: ec105000-ec106000 (prefetchable)
Memory window 1: ec107000-ec108000
I/O window 0: 0000a800-0000ac03
I/O window 1: 0000b000-0000b403
BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset- 16bInt- PostWrite+
16-bit legacy interface ports at 0001

00:0a.1 CardBus bridge: Texas Instruments PCI1420
Subsystem: CARRY Computer ENG. CO Ltd: Unknown device 0202
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 168, cache line size 08
Interrupt: pin A routed to IRQ 5
Region 0: Memory at ec109000 (32-bit, non-prefetchable) [size=4K]
Bus: primary=00, secondary=03, subordinate=03, sec-latency=176
Memory window 0: ec10a000-ec10b000 (prefetchable)
Memory window 1: ec10c000-ec10d000
I/O window 0: 0000b800-0000bc03
I/O window 1: 0000c000-0000c403
BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset+ 16bInt+ PostWrite+
16-bit legacy interface ports at 0001

00:0f.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C (rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RT8139
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (8000ns min, 16000ns max)
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at c800 [size=256]
Region 1: Memory at ec10e000 (32-bit, non-prefetchable) [size=256]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0-,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:10.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host Controller (rev 46) (prog-if 10 [OHCI])
Subsystem: VIA Technologies, Inc. IEEE 1394 Host Controller
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (8000ns max), cache line size 08
Interrupt: pin A routed to IRQ 9
Region 0: Memory at ec10f000 (32-bit, non-prefetchable) [size=2K]
Region 1: I/O ports at cc00 [size=128]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2+ AuxCurrent=0mA PME(D0-,D1-,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS]: Unknown device 6325 (prog-if 00 [VGA])
Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer: Unknown device f451
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin A routed to IRQ 10
BIST result: 00
Region 0: Memory at e0000000 (32-bit, prefetchable) [size=128M]
Region 1: Memory at ec000000 (32-bit, non-prefetchable) [size=128K]
Region 2: I/O ports at 9000 [size=128]
Capabilities: [40] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [50] AGP version 2.0
Status: RQ=15 SBA+ 64bit- FW- Rate=x1,x2
Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>

02:00.0 Network controller: Harris Semiconductor: Unknown device 3890 (rev 01)
Subsystem: Netgear: Unknown device 4800
Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin A routed to IRQ 5
Region 0: [virtual] Memory at ec108000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [dc] Power Management version 1
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00000000-0009ffff : System RAM
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-0dfeffff : System RAM
00100000-00256b24 : Kernel code
00256b25-002eaf0b : Kernel data
0dff0000-0dff2fff : ACPI Non-volatile Storage
0dff3000-0dffffff : ACPI Tables
e0000000-e7ffffff : PCI Bus #01
e0000000-e7ffffff : Silicon Integrated Systems [SiS] SiS65x/M650/740 PCI/AGP VGA Display Adapter
e8000000-ebffffff : Silicon Integrated Systems [SiS] SiS651 Host
ec000000-ec0fffff : PCI Bus #01
ec000000-ec01ffff : Silicon Integrated Systems [SiS] SiS65x/M650/740 PCI/AGP VGA Display Adapter
ec100000-ec100fff : Silicon Integrated Systems [SiS] USB 1.0 Controller
ec101000-ec101fff : Silicon Integrated Systems [SiS] USB 1.0 Controller (#2)
ec102000-ec102fff : Silicon Integrated Systems [SiS] USB 1.0 Controller (#3)
ec103000-ec103fff : Silicon Integrated Systems [SiS] USB 2.0 Controller
ec104000-ec104fff : Texas Instruments PCI1420
ec105000-ec106fff : PCI CardBus #02
ec107000-ec108fff : PCI CardBus #02
ec108000-ec108fff :
ec109000-ec109fff : Texas Instruments PCI1420 (#2)
ec10a000-ec10bfff : PCI CardBus #03
ec10c000-ec10dfff : PCI CardBus #03
ec10e000-ec10e0ff : Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+
ec10e000-ec10e0ff : 8139too
ec10f000-ec10f7ff : VIA Technologies, Inc. IEEE 1394 Host Controller
fec00000-ffffffff : reserved

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