PCI, Linux a gigabitova sitova karta

Michal Ludvig michal-linux na logix.cz
Středa Březen 19 17:01:59 CET 2003


Jan Kasprzak wrote:
> 	mam desku s chipsetem AMD 768MP (ne MPX), coz by melo umet
> 33MHz 64-bitovou PCI sbernici. V dlouhem slotu mam kartu 3c985B
> (Tigon 2 cipset). Chtel jsem overit, jestli skutecne se pouziva
> jako 64-bitova. Program lspci -vv mi o ni pise:
> 
> 00:08.0 Ethernet controller: 3Com Corporation 3c985 1000BaseSX (rev 01)
>         Subsystem: Unknown device 9850:0001
>         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: 64 (16000ns min), cache line size 10
>         Interrupt: pin A routed to IRQ 5
>         Region 0: Memory at f4000000 (32-bit, non-prefetchable) [size=16K]
> 
> 	Dost zajimave je, ze pise 66MHz (pricemz northbridge by nemel
> 66MHz umet), ale zase pise ze pamet ma 32-bitovou. Neni to divne?

Nemuze byt neco shnileho v tom radku "Subsystem: Unknown device 
9850:0001"? Ze by nemel ovladac primo pro ten chipset a nejaky fallback 
funguje jen na 32b?

Kazdopadne me karta s Tigonem 3 funguje na jadre 2.4.20 jak ma:

01:04.0 Ethernet controller: BROADCOM Corporation NetXtreme BCM5701 
Gigabit Ethernet (rev 15)
         Subsystem: 3Com Corporation 3C996B-T 1000BaseTX
         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: 64 (16000ns min), cache line size 10
         Interrupt: pin A routed to IRQ 5
         Region 0: Memory at fa000000 (64-bit, non-prefetchable) [size=64K]
[...]

Michal Ludvig



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