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SubjectRe: C99 Initialisers
On Thu, Aug 14, 2003 at 12:05:28PM +0200, Geert Uytterhoeven wrote:
> On Wed, 13 Aug 2003, Jeff Garzik wrote:
> > > On Wed, Aug 13, 2003 at 03:44:44PM -0400, Jeff Garzik wrote:
> > >>enums are easy putting direct references would be annoying, but I also
> > >>argue it's potentially broken and wrong to store and export that
> > >>information publicly anyway. The use of enums instead of pointers is
> > >>practically required because there is a many-to-one relationship of ids
> > >>to board information structs.
> > >
> > > The hard part is that it's actually many-to-many. The same card can have
> > > multiple drivers. one driver can support many cards.
> >
> > pci_device_tables are (and must be) at per-driver granularity. Sure the
> > same card can have multiple drivers, but that doesn't really matter in
> > this context, simply because I/we cannot break that per-driver
> > granularity. Any solution must maintain per-driver granularity.
>
> Aren't there any `hidden multi-function in single-function' PCI devices out
> there? E.g. cards with a serial and a parallel port?
>
> At least for the Zorro bus, these exist. E.g. the Ariadne card contains both
> Ethernet and 2 parallel ports, so the Ariadne Ethernet driver and the (still to
> be written) Ariadne parallel port driver are both drivers for the same Zorro
> device.

I'm not sure but i think most of those look like multiple
pci devices rather than one device with multiple functions.
I've got an Initio 9520UW: One PCI card with two ini9x00 UW
SCSI HBAs sharing one interrupt and one EEPro100 on another
interrupt. During scan it seems to me to be three devices
sitting behind a bridge.

This is on 2.4.18 so 2.6 may look a little different.

$ lspci -tvv
-[00]-+-00.0 Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX Host bridge
[snip +- a bunch of devices]
\-0c.0-[02]--+-04.0 Initio Corporation 360P
+-08.0 Initio Corporation 360P
\-09.0 Intel Corp. 82557/8/9 [Ethernet Pro 100]

$ lspci -vv
[snip]
00:0c.0 PCI bridge: Digital Equipment Corporation DECchip 21152 (rev 02) (prog-if 00 [Normal decode])
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, cache line size 08
Bus: primary=00, secondary=02, subordinate=02, sec-latency=32
I/O behind bridge: 0000c000-0000cfff
Memory behind bridge: de800000-dfffffff
Prefetchable memory behind bridge: 00000000e2f00000-00000000e3e00000
BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B-
02:04.0 SCSI storage controller: Initio Corporation 360P (rev 01)
Subsystem: Unknown device 9292:0202
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: 32, cache line size 08
Interrupt: pin A routed to IRQ 9
Region 0: I/O ports at c800 [size=256]
Region 1: Memory at df800000 (32-bit, non-prefetchable) [size=4K]
Expansion ROM at <unassigned> [disabled] [size=32K]
02:08.0 SCSI storage controller: Initio Corporation 360P (rev 01)
Subsystem: Unknown device 9292:0202
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: 32, cache line size 08
Interrupt: pin A routed to IRQ 9
Region 0: I/O ports at c400 [size=256]
Region 1: Memory at df000000 (32-bit, non-prefetchable) [size=4K]
Expansion ROM at <unassigned> [disabled] [size=32K]
02:09.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 02)
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 (2000ns min, 14000ns max)
Interrupt: pin A routed to IRQ 11
Region 0: Memory at e3000000 (32-bit, prefetchable) [size=4K]
Region 1: I/O ports at c000 [size=32]
Region 2: Memory at de800000 (32-bit, non-prefetchable) [size=1M]
Expansion ROM at <unassigned> [disabled] [size=1M]

--
________________________________________________________________
J.W. Schultz Pegasystems Technologies
email address: jw@pegasys.ws
Remember Cernan and Schmitt
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