Why some devices cannot be detected?

[John Baldwin]

On Wednesday 24 September 2008 05:36:53 am Andrey V. Elsukov wrote:
> Hi, All.
> 
> I don't have this problem, but i saw it in several users reports.
> System can't detect some devices. Last example (from one report):
> Windows/Linux detected LSI MegaRAID SAS 8408E RAID Controller on
> an motherboard, but freebsd didn't detect.
> 
> pciconf list:
> hostb0 at pci0:0:0:0:   class=0x060000 card=0x83361033 chip=0x25d88086 
> rev=0xb1 hdr=0x00
> pcib1 at pci0:0:2:0:   class=0x060400 card=0x00000000 chip=0x25f78086 
> rev=0xb1 hdr=0x01
> pcib8 at pci0:0:3:0:   class=0x060400 card=0x00000000 chip=0x25e38086 
> rev=0xb1 hdr=0x01
> pcib9 at pci0:0:4:0:   class=0x060400 card=0x00000000 chip=0x25f88086 
> rev=0xb1 hdr=0x01
> pcib10 at pci0:0:5:0:   class=0x060400 card=0x00000000 chip=0x25e58086 
> rev=0xb1 hdr=0x01
> pcib11 at pci0:0:6:0:   class=0x060400 card=0x00000000 chip=0x25e68086 
> rev=0xb1 hdr=0x01
> pcib12 at pci0:0:7:0:   class=0x060400 card=0x00000000 chip=0x25e78086 
> rev=0xb1 hdr=0x01
> hostb1 at pci0:0:16:0:   class=0x060000 card=0x83361033 chip=0x25f08086 
> rev=0xb1 hdr=0x00
> hostb2 at pci0:0:16:1:   class=0x060000 card=0x83361033 chip=0x25f08086 
> rev=0xb1 hdr=0x00
> hostb3 at pci0:0:16:2:   class=0x060000 card=0x83361033 chip=0x25f08086 
> rev=0xb1 hdr=0x00
> hostb4 at pci0:0:17:0:   class=0x060000 card=0x83361033 chip=0x25f18086 
> rev=0xb1 hdr=0x00
> hostb5 at pci0:0:19:0:   class=0x060000 card=0x83361033 chip=0x25f38086 
> rev=0xb1 hdr=0x00
> hostb6 at pci0:0:21:0:   class=0x060000 card=0x83361033 chip=0x25f58086 
> rev=0xb1 hdr=0x00
> hostb7 at pci0:0:22:0:   class=0x060000 card=0x83361033 chip=0x25f68086 
> rev=0xb1 hdr=0x00
> pcib13 at pci0:0:28:0:   class=0x060400 card=0x83361033 chip=0x26908086 
> rev=0x09 hdr=0x01
> uhci0 at pci0:0:29:0:   class=0x0c0300 card=0x83361033 chip=0x26888086 
> rev=0x09 hdr=0x00
> uhci1 at pci0:0:29:1:   class=0x0c0300 card=0x83361033 chip=0x26898086 
> rev=0x09 hdr=0x00
> uhci2 at pci0:0:29:2:   class=0x0c0300 card=0x83361033 chip=0x268a8086 
> rev=0x09 hdr=0x00
> uhci3 at pci0:0:29:3:   class=0x0c0300 card=0x83361033 chip=0x268b8086 
> rev=0x09 hdr=0x00
> ehci0 at pci0:0:29:7:   class=0x0c0320 card=0x83361033 chip=0x268c8086 
> rev=0x09 hdr=0x00
> pcib14 at pci0:0:30:0:   class=0x060401 card=0x83361033 chip=0x244e8086 
> rev=0xd9 hdr=0x01
> isab0 at pci0:0:31:0:   class=0x060100 card=0x83361033 chip=0x26708086 
> rev=0x09 hdr=0x00
> atapci0 at pci0:0:31:1:   class=0x01018a card=0x83361033 chip=0x269e8086 
> rev=0x09 hdr=0x00
> none0 at pci0:0:31:3:   class=0x0c0500 card=0x83361033 chip=0x269b8086 
> rev=0x09 hdr=0x00
> pcib2 at pci0:1:0:0:   class=0x060400 card=0x83361033 chip=0x35008086 
> rev=0x01 hdr=0x01
> pcib7 at pci0:1:0:3:   class=0x060400 card=0x83361033 chip=0x350c8086 
> rev=0x01 hdr=0x01
> pcib3 at pci0:2:0:0:   class=0x060400 card=0x83361033 chip=0x35108086 
> rev=0x01 hdr=0x01
> pcib6 at pci0:2:2:0:   class=0x060400 card=0x83361033 chip=0x35188086 
> rev=0x01 hdr=0x01
> pcib4 at pci0:3:0:0:   class=0x060400 card=0x00000000 chip=0x03708086 
> rev=0x00 hdr=0x01
> pcib5 at pci0:3:0:2:   class=0x060400 card=0x00000000 chip=0x03728086 
> rev=0x00 hdr=0x01
> em0 at pci0:12:0:0:   class=0x020000 card=0x83361033 chip=0x10968086 
> rev=0x01 hdr=0x00
> em1 at pci0:12:0:1:   class=0x020000 card=0x83361033 chip=0x10968086 
> rev=0x01 hdr=0x00
> mpt0 at pci0:13:5:0:   class=0x010000 card=0x83361033 chip=0x00541000 
> rev=0x01 hdr=0x00
> vgapci0 at pci0:36:0:0:   class=0x030000 card=0x83361033 chip=0x0522102b 
> rev=0x02 hdr=0x00
> 
> Windows detects it as
> 
> Device Description   LSI MegaRAID SAS 8408E RAID Controller
> Bus Type   PCI-X
> Bus / Device / Function   4 / 14 / 0
> Device ID   1000-0411
> Subsystem ID   1000-1001
> Device Class   0104 (RAID Controller)
> Revision   00
> Fast Back-to-Back Transactions   Not Supported
> 
> Device Features
> 66 MHz Operation   Supported
> Bus Mastering   Enabled
> 
> PCI-X Device Properties
> 64-bit Device   Yes
> 133 MHz Operation   Supported
> PCI-X 266   Not Supported
> PCI-X 533   Not Supported
> ---------------------------------------
> 
> So, question is why freebsd can't detect this device?

FreeBSD didn't see a PCI bus 4.  Can you determine from another OS if PCI bus 
4 is attached to a Host-PCI bridge or a PCI-PCI bridge?

-- 
John Baldwin