Hardware is Dell R510, 2xCPU E5620, 32GB RAM Intel 10Gb SR Server Adapter: ix0@pci0:3:0:0: class=0x020000 card=0xa05f8086 chip=0x10c78086 rev=0x01 hdr=0x00 vendor = 'Intel Corporation' device = '82598EB 10-Gigabit AF Network Connection' class = network subclass = ethernet If this 10Gb card inserted into PCI-E x8 Gen2 slot: Booting FreeBSD 10.0-STABLE #0 r267874: ix0: <Intel(R) PRO/10GbE PCI-Express Network Driver, Version - 2.5.15> port 0xece0-0xecff mem 0xdf2a0000-0xdf2bffff,0xdf2c0000-0xdf2fffff,0xdf29c000-0xdf29ffff irq 38 at device 0.0 on pci3 ix0: Using MSIX interrupts with 9 vectors ix0: Ethernet address: 00:1b:21:5c:83:11 ix0: PCI Express Bus: Speed 2.5GT/s Width x1 ix0: PCI-Express bandwidth available for this card is not sufficient for optimal performance. ix0: For optimal performance a x8 PCIE, or x4 PCIE Gen2 slot is required. Same situation for 9.3-RC1, but I have no dmesg output for it, so may be not excatly. Booting 10.0-RELEASE seems is Ok. But fail to detect Gen2. ix0: <Intel(R) PRO/10GbE PCI-Express Network Driver, Version - 2.5.15> port 0xece0-0xecff mem 0xdf2a0000-0xdf2bffff,0xdf2c0000-0xdf2fffff,0xdf29c000-0xdf29ffff irq 38 at device 0.0 on pci3 ix0: Using MSIX interrupts with 9 vectors ix0: Ethernet address: 00:1b:21:5c:83:11 ix0: PCI Express Bus: Speed 2.5GT/s Width x8 When same card inserted into x4 Gen2 slot, 10.0-RELEASE also fail to detect Gen2: ix0: <Intel(R) PRO/10GbE PCI-Express Network Driver, Version - 2.5.15> port 0xdce0-0xdcff mem 0xdf4a0000-0xdf4bffff,0xdf4c0000-0xdf4fffff,0xdf49c000-0xdf49ffff irq 41 at device 0.0 on pci5 ix0: Using MSIX interrupts with 9 vectors ix0: Ethernet address: 00:1b:21:5c:83:11 ix0: PCI Express Bus: Speed 2.5GT/s Width x4 ix0: PCI-Express bandwidth available for this card is not sufficient for optimal performance. ix0: For optimal performance a x8 PCIE, or x4 PCIE Gen2 slot is required.
Over to maintainers.
As far as I remember, Intel 82598 is not capable of doing 5GT/s. Quoting product brief: "The Intel® 82598 10 Gigabit Ethernet Controller is a next-generation, PCI Express* 2.0 (2.5 Gbps) controller with balanced features " http://www.intel.com/content/www/us/en/network-adapters/10-gigabit-network-adapters/82598-10-gigabit-ethernet-controller-brief.html
(In reply to Andrew from comment #0) Andrew: Can you attach a full pciconf -lvbc to this bugzilla report?
Seems to be fixed now: ix0@pci0:180:0:0: class=0x020000 rev=0x01 hdr=0x00 vendor=0x8086 device=0x10fb subvendor=0x8086 subdevice=0x000c vendor = 'Intel Corporation' device = '82599ES 10-Gigabit SFI/SFP+ Network Connection' class = network subclass = ethernet bar [10] = type Prefetchable Memory, range 64, base rxde180000, size 524288, enabled bar [18] = type I/O Port, range 32, base rxd020, size 32, enabled bar [20] = type Prefetchable Memory, range 64, base rxde204000, size 16384, enabled cap 01[40] = powerspec 3 supports D0 D3 current D0 cap 05[50] = MSI supports 1 message, 64 bit, vector masks cap 11[70] = MSI-X supports 64 messages, enabled Table in map 0x20[0x0], PBA in map 0x20[0x2000] cap 10[a0] = PCI-Express 2 endpoint max data 512(512) FLR RO NS max read 4096 link x8(x8) speed 5.0(5.0) ASPM disabled(L0s) ecap 0001[100] = AER 1 0 fatal 0 non-fatal 1 corrected ecap 0003[140] = Serial 1 90e2baffff218848 ecap 000e[150] = ARI 1 ecap 0010[160] = SR-IOV 1 IOV disabled, Memory Space disabled, ARI disabled 0 VFs configured out of 64 supported First VF RID Offset 0x0180, VF RID Stride 0x0002 VF Device ID 0x10ed Page Sizes: 4096 (enabled), 8192, 65536, 262144, 1048576, 4194304