No data received with Intel Corporation Gigabit CT Desktop Adapter (82574L)

[John Baldwin]

On Thursday, April 28, 2011 5:17:11 pm Wiktor Niesiobedzki wrote:
> Hi,
> 
> I really don't know (I haven't done that intentionally). There is
> nothing special in /var/log/messages:
> kadlubek# grep -i msix /var/log/messages
> Apr 28 21:37:03 kadlubek kernel: em0: Using MSIX interrupts with 0 vectors
> 
> Though sysctl suggests, that I haven't disabled MSIX:
> kadlubek# sysctl -a | grep -i msix
> hw.pci.enable_msix: 1
> 
> I've checked further pciconf output (now with -c option also) and there is:
> em0 at pci0:2:0:0: class=0x020000 card=0xa01f8086 chip=0x10d38086 rev=0x00 
hdr=0x00
>     vendor     = 'Intel Corporation'
>     device     = 'Intel 82574L Gigabit Ethernet Controller (82574L)'
>     class      = network
>     subclass   = ethernet
>     cap 01[c8] = powerspec 2  supports D0 D3  current D0
>     cap 05[d0] = MSI supports 1 message, 64 bit
>     cap 10[e0] = PCI-Express 1 endpoint max data 128(256) link x1(x1)
>     cap 11[a0] = MSI-X supports 5 messages in map 0x1c enabled
> 
> So it looks, like the card supports MSI-X and has them enabled.
> 
> Though my PCI Express bridges report as:
> pcib2 at pci0:0:2:0:       class=0x060400 card=0xc3231106 chip=0xa3641106
> rev=0x80 hdr=0x01
>     vendor     = 'VIA Technologies, Inc.'
>     device     = 'P4M900 PCI to PCI Bridge Controller'
>     class      = bridge
>     subclass   = PCI-PCI
>     cap 10[40] = PCI-Express 1 root port max data 128(256) link x1(x1)
>     cap 01[68] = powerspec 2  supports D0 D3  current D0
>     cap 05[70] = MSI supports 1 message, 64 bit
>     cap 08[88] = HT MSI fixed address window disabled at 0xfee00000
>     cap 0d[98] = PCI Bridge card=0xc3231106
> ecap 0001[100] = AER 1 0 fatal 0 non-fatal 0 corrected
> ecap 0002[140] = VC 1 max VC1
> ecap 0005[180] = unknown 1
> pcib3 at pci0:0:3:0:       class=0x060400 card=0xc3231106 chip=0xc3641106
> rev=0x80 hdr=0x01
>     vendor     = 'VIA Technologies, Inc.'
>     device     = 'P4M900 PCI to PCI Bridge Controller'
>     class      = bridge
>     subclass   = PCI-PCI
>     cap 10[40] = PCI-Express 1 root port max data 128(256) link x1(x1)
>     cap 01[68] = powerspec 2  supports D0 D3  current D0
>     cap 05[70] = MSI supports 1 message, 64 bit
>     cap 08[88] = HT MSI fixed address window disabled at 0xfee00000
>     cap 0d[98] = PCI Bridge card=0xc3231106
> ecap 0001[100] = AER 1 0 fatal 0 non-fatal 0 corrected
> ecap 0002[140] = VC 1 max VC1
> ecap 0005[180] = unknown 1
> 
> pcib5 at pci0:128:0:0:     class=0x060400 card=0x00000000 chip=0x287c1106
> rev=0x00 hdr=0x01
>     vendor     = 'VIA Technologies, Inc.'
>     device     = 'VT8251 Standard PCIe Root Port'
>     class      = bridge
>     subclass   = PCI-PCI
>     cap 10[40] = PCI-Express 1 root port max data 128(256) link x0(x2)
>     cap 01[68] = powerspec 2  supports D0 D3  current D0
>     cap 05[70] = MSI supports 1 message, 64 bit, vector masks
>     cap 08[88] = HT MSI fixed address window disabled at 0xfee00000
>     cap 0d[90] = PCI Bridge card=0x00000000
> ecap 0001[100] = AER 1 0 fatal 0 non-fatal 0 corrected
> ecap 0002[140] = VC 1 max VC1
> ecap 0005[180] = unknown 1
> pcib6 at pci0:128:0:1:     class=0x060400 card=0x00000004 chip=0x287d1106
> rev=0x00 hdr=0x01
>     vendor     = 'VIA Technologies, Inc.'
>     device     = 'VT8251 Standard PCIe Root Port'
>     class      = bridge
>     subclass   = PCI-PCI
>     cap 10[40] = PCI-Express 1 root port max data 128(256) link x0(x1)
>     cap 01[68] = powerspec 2  supports D0 D3  current D0
>     cap 05[70] = MSI supports 1 message, 64 bit, vector masks
>     cap 08[88] = HT MSI fixed address window disabled at 0xfee00000
>     cap 0d[90] = PCI Bridge card=0x00000004
> 
> Though they mention that HT MSI windows is disabled. I'm not sure,
> whether this matters.

Yes, that is probably what breaks this.

-- 
John Baldwin