[dpdk-dev] IXGBE, IOMMU DMAR DRHD handling fault issue

[Ravi Kerur]

Hi,

I am running into an issue when DPDK is started with iommu on via GRUB
command. Problem is not seen with regular kernel driver, error messages
show when DPDK is started and happens for both PF and VF interfaces.

I am using DPDK 17.05 so the patch proposed in the following link is
available
http://dpdk.org/ml/archives/dev/2017-February/057048.html

Workaround is to use "iommu=pt" but I want iommu enabled in my setup. I
checked BIOS for reserved memory(DMA RMRR for IXGBE) didn't get any details
on it.

Kindly let me know how to resolve this issue.

Following are the details

(1) Linux kernel 4.9
(2) DPDK 17.05

(3) IXGBE details
ethtool -i enp4s0f0  (PF driver)
driver: ixgbe
version: 5.3.3
firmware-version: 0x800007b8, 1.1018.0
bus-info: 0000:04:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes

ethtool -i enp4s16f2 (VF driver)
driver: ixgbevf
version: 4.3.2
firmware-version:
bus-info: 0000:04:10.2
supports-statistics: yes
supports-test: yes
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: no

Bus info          Device       Class          Description
=========================================================
pci at 0000:01:00.0  ens11f0      network        82599ES 10-Gigabit SFI/SFP+
Network Connection
pci at 0000:01:00.1  ens11f1      network        82599ES 10-Gigabit SFI/SFP+
Network Connection
pci at 0000:04:00.0  enp4s0f0     network        82599ES 10-Gigabit SFI/SFP+
Network Connection
pci at 0000:04:00.1  enp4s0f1     network        82599ES 10-Gigabit SFI/SFP+
Network Connection
pci at 0000:04:10.0  enp4s16      network        Illegal Vendor ID
pci at 0000:04:10.2  enp4s16f2    network        Illegal Vendor ID

(4) DPDK bind interfaces

# dpdk-devbind -s

Network devices using DPDK-compatible driver
============================================
0000:01:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb'
drv=igb_uio unused=vfio-pci
0000:04:10.2 '82599 Ethernet Controller Virtual Function 10ed' drv=igb_uio
unused=vfio-pci

Network devices using kernel driver
===================================
0000:01:00.1 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb'
if=ens11f1 drv=ixgbe unused=igb_uio,vfio-pci
0000:04:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb'
if=enp4s0f0 drv=ixgbe unused=igb_uio,vfio-pci
0000:04:00.1 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb'
if=enp4s0f1 drv=ixgbe unused=igb_uio,vfio-pci
0000:04:10.0 '82599 Ethernet Controller Virtual Function 10ed' if=enp4s16
drv=ixgbevf unused=igb_uio,vfio-pci
0000:06:00.0 'I210 Gigabit Network Connection 1533' if=eno1 drv=igb
unused=igb_uio,vfio-pci *Active*

Other Network devices
=====================
<none>

...

(5) Kernel dmesg

# dmesg | grep -e DMAR
[    0.000000] ACPI: DMAR 0x000000007999BAD0 0000E0 (v01 ALASKA A M I
00000001 INTL 20091013)
[    0.000000] DMAR: IOMMU enabled
[    0.518747] DMAR: Host address width 46
[    0.526616] DMAR: DRHD base: 0x000000fbffc000 flags: 0x0
[    0.537447] DMAR: dmar0: reg_base_addr fbffc000 ver 1:0 cap
d2078c106f0466 ecap f020df
[    0.553620] DMAR: DRHD base: 0x000000c7ffc000 flags: 0x1
[    0.564445] DMAR: dmar1: reg_base_addr c7ffc000 ver 1:0 cap
d2078c106f0466 ecap f020df
[    0.580611] DMAR: RMRR base: 0x0000007bbc6000 end: 0x0000007bbd4fff
[    0.593344] DMAR: ATSR flags: 0x0
[    0.600178] DMAR: RHSA base: 0x000000c7ffc000 proximity domain: 0x0
[    0.612905] DMAR: RHSA base: 0x000000fbffc000 proximity domain: 0x1
[    0.625632] DMAR-IR: IOAPIC id 3 under DRHD base  0xfbffc000 IOMMU 0
[    0.638522] DMAR-IR: IOAPIC id 1 under DRHD base  0xc7ffc000 IOMMU 1
[    0.651426] DMAR-IR: IOAPIC id 2 under DRHD base  0xc7ffc000 IOMMU 1
[    0.664324] DMAR-IR: HPET id 0 under DRHD base 0xc7ffc000
[    0.675326] DMAR-IR: Queued invalidation will be enabled to support
x2apic and Intr-remapping.
[    0.693805] DMAR-IR: Enabled IRQ remapping in x2apic mode
[    9.395170] DMAR: dmar1: Using Queued invalidation
[    9.405011] DMAR: Setting RMRR:
[    9.412006] DMAR: Setting identity map for device 0000:00:1d.0
[0x7bbc6000 - 0x7bbd4fff]
[    9.428569] DMAR: Prepare 0-16MiB unity mapping for LPC
[    9.439712] DMAR: Setting identity map for device 0000:00:1f.0 [0x0 -
0xffffff]
[    9.454684] DMAR: Intel(R) Virtualization Technology for Directed I/O
[  287.023068] DMAR: DRHD: handling fault status reg 2
[  287.023073] DMAR: [DMA Read] Request device [01:00.0] fault addr
18a260a000 [fault reason 06] PTE Read access is not set
[  287.023180] DMAR: DRHD: handling fault status reg 102
[  287.023183] DMAR: [DMA Read] Request device [01:00.0] fault addr
18a3010000 [fault reason 06] PTE Read access is not set
[  287.038250] DMAR: DRHD: handling fault status reg 202
[  287.038252] DMAR: [DMA Read] Request device [01:00.0] fault addr
18a3010000 [fault reason 06] PTE Read access is not set
[  288.170165] DMAR: DRHD: handling fault status reg 302
[  288.170170] DMAR: [DMA Read] Request device [01:00.0] fault addr
1890754000 [fault reason 06] PTE Read access is not set
[  288.694496] DMAR: DRHD: handling fault status reg 402
[  288.694499] DMAR: [DMA Read] Request device [04:10.2] fault addr
189069c000 [fault reason 06] PTE Read access is not set
[  289.927113] DMAR: DRHD: handling fault status reg 502
[  289.927116] DMAR: [DMA Read] Request device [01:00.0] fault addr
1890754000 [fault reason 06] PTE Read access is not set
[  290.174275] DMAR: DRHD: handling fault status reg 602
[  290.174279] DMAR: [DMA Read] Request device [01:00.0] fault addr
1890754000 [fault reason 06] PTE Read access is not set
[  292.174247] DMAR: DRHD: handling fault status reg 702
[  292.174251] DMAR: [DMA Read] Request device [01:00.0] fault addr
1890754000 [fault reason 06] PTE Read access is not set
[  294.174227] DMAR: DRHD: handling fault status reg 2
[  294.174230] DMAR: [DMA Read] Request device [01:00.0] fault addr
1890754000 [fault reason 06] PTE Read access is not set
[  296.174216] DMAR: DRHD: handling fault status reg 102
[  296.174219] DMAR: [DMA Read] Request device [01:00.0] fault addr
1890754000 [fault reason 06] PTE Read access is not set
[root at infradev-comp006.naw02.infradev.viasat.io ~]
#

Thanks.