sdilene IRQ (OT: Důvod přechodu na Linux)

[Petr Cahyna]

Michal Dobes wrote:
> Miroslav BENES wrote:
> 
>>>Pokud vim, tak Kernel 2.4 nepodporuje ACPI, proto
>>>Linuxove distribuce nenacpou nic na jedno IRQ.
>>>
>>Kernel 2.4.17-0.16. Ale mam dojem ze to sdileni uz chodilo o rady 2.2.
>>
>>
> 
> Presneji, linux nemeni nastaveni IRQ pridelene BIOSem, ale pokud 
> nekolik zarizeni je nastaveno na jedno IRQ od BIOSu, tak to pouzije 
> za predpokladu, ze prislusny driver pripojujici se na interrupt ma
> nastaven flag o podpore sdileneho IRQ (SA_SHIRQ). 
> Pokud ne, tak dovoli pripojit na IRQ jen jednu vec (co se prihlasi
> prvni) a ostatni drivery maj smulu. Samozrejme vsechny drivery
> pripojujici se na jedno IRQ musi podporovat sdileni, pokud nepodporuje
> sdileni jiz prvni driver, tak zadny dalsi se jiz nepripoji. Pokud
> se jako prvni pripoji driver s podporou sdileni, tak dalsi drivery
> s podporou sdileni se pripoji a pripadne drivery bez podpory jsou
> odmitnuty.
> 
> 	Majkl
> 
zdravim vas :-),
... a nevite nekdo, jak je to s vice nez 2ma zarizenima na jednom IRQ ? 
Doma jsem mel potize s tim, ze 2-portove USB se mi ladovalo na IRQ na 
kterem sedel SCSI radic (ncr53c8x). Myslel jsem, ze ten driver 
nepodporuje sdileni (kdyz jsem odladoval driver, v pohode fungovalo USB 
a naopak). Kdyz jsem po tom sel, tak prvni port z USB mi vubec 
nezjistil, ze na IRQ sedi scsi karta, ale zfailovalo to na druhem portu 
(sedicim na tom samem IRQ). Protoze v biosu neslo ohledne nastaveni IRQ 
k jednotlivym slotum vubec nic :-( (via686a), jsem musel jsem prehazet 
karty a vynechat nektere sloty a podarilo se mi (metoda pokus/omyl)
posadit na kazde IRQ max 2 zarizeni, takze dneska mi vse funguje.
Nicmene zrovna systemove reseni to nebylo :-( . Zajimalo by me, jestli 
je to obecny problem, nebo problem v konkretnich podminkach danych 
chipsetem, kartama, zarizenima na boardu, apod ...


						caha

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SCSI subsystem driver Revision: 1.00
scsi-ncr53c7,8xx : at PCI bus 0, device 9, function 0
PCI: Found IRQ 11 for device 00:09.0
scsi-ncr53c7,8xx : NCR53c810 at memory 0xdb000000, io 0xec00, irq 11
scsi0 : burst length 8
scsi0 : reset ccf to 3 from 0
scsi0 : NCR code relocated to 0x1920614 (virt 0xc1920614)
scsi0 : test 1 started
scsi0 : NCR53c{7,8}xx (rel 17)
scsi0 : target 5 rejected SDTR
scsi0 : setting target 5 to asynchronous SCSI
   Vendor: PINNACLE  Model: RCD-1000          Rev: 2.35
   Type:   WORM                               ANSI SCSI revision: 02
.....
.....
usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
usb-uhci.c: $Revision: 1.268 $ time 06:03:01 Dec  8 2001
usb-uhci.c: High bandwidth mode enabled
PCI: Found IRQ 11 for device 00:07.2
PCI: Sharing IRQ 11 with 00:07.3
usb-uhci.c: USB UHCI at I/O 0xd400, IRQ 11
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 1
usb-uhci.c: request_irq 11 failed!
PCI: Found IRQ 11 for device 00:07.3
PCI: Sharing IRQ 11 with 00:07.2
usb-uhci.c: USB UHCI at I/O 0xd800, IRQ 11
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 2
usb-uhci.c: request_irq 11 failed!
usb-uhci.c: v1.268:USB Universal Host Controller Interface driver
usb.c: deregistering driver usbdevfs
usb.c: null device being purged!!!
usb.c: null device being purged!!!
usb.c: deregistering driver hub
usb.c: null device being purged!!!
usb.c: null device being purged!!!
usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
usb.c: registered new driver usblp
printer.c: v0.8:USB Printer Device Class driver
usb-uhci.c: $Revision: 1.268 $ time 06:03:01 Dec  8 2001
usb-uhci.c: High bandwidth mode enabled
PCI: Found IRQ 11 for device 00:07.2
PCI: Sharing IRQ 11 with 00:07.3
usb-uhci.c: USB UHCI at I/O 0xd400, IRQ 11
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 1
usb-uhci.c: request_irq 11 failed!
PCI: Found IRQ 11 for device 00:07.3
PCI: Sharing IRQ 11 with 00:07.2
usb-uhci.c: USB UHCI at I/O 0xd800, IRQ 11
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 2
usb-uhci.c: request_irq 11 failed!
usb-uhci.c: v1.268:USB Universal Host Controller Interface driver
.....
.....

-- 
========================================= | Petr Cahyna,   ICZ a.s.
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