[Bug 272828] Intel XL710 : kernel panic with SRVIO - intel-ixl-kmod-1.12.40

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272828

            Bug ID: 272828
           Summary: Intel XL710 : kernel panic with SRVIO -
                    intel-ixl-kmod-1.12.40
           Product: Base System
           Version: 13.2-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: sm@codenetworks.net

Created attachment 243717
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=243717&action=edit
ixl panic screenshot

Hi there, the intel_ixl_updated (intel-ixl-kmod-1.12.40) driver makes the
kernel panic when trying to create virtual functions. without SRIOV seems to be
stable. please see attached image for the panic.

Release : 13.2-p1
Hardware : Super-micro (happens on multiple machines).


dmesg:
ixl0: <Intel(R) Ethernet Connection 700 Series PF Driver, Version - 1.12.40>
mem 0xb0800000-0xb0ffffff,0xb1808000-0xb180ffff irq 118 at device 0.0 on pci14
ixl0: using 1024 tx descriptors and 1024 rx descriptors
ixl0: fw 7.2.60285 api 1.9 nvm 7.20 etid 80008322 oem 1.266.0
ixl0: PF-ID[0]: VFs 64, MSI-X 129, VF MSI-X 5, QPs 768, I2C
ixl0: Using MSI-X interrupts with 9 vectors
ixl0: Allocating 8 queues for PF LAN VSI; 8 queues active
ixl0: Ethernet address: 3c:ec:ef:32:c3:ec
ixl0: PCI Express Bus: Speed 8.0GT/s Width x8
ixl0: SR-IOV ready
ixl0: The device is not iWARP enabled


sysctl output:
dev.ixl.0.fw_version: fw 7.2.60285 api 1.9 nvm 7.20 etid 80008322 oem 1.266.0
dev.ixl.0.current_speed: 40 Gbps
dev.ixl.0.supported_speeds: 32
dev.ixl.0.advertise_speed: 32
dev.ixl.0.fc: 0
dev.ixl.0.%parent: pci14
dev.ixl.0.%pnpinfo: vendor=0x8086 device=0x1583 subvendor=0x15d9
subdevice=0x084a class=0x020000
dev.ixl.0.%location: slot=0 function=0 dbsf=pci0:65:0:0
dev.ixl.0.%driver: ixl
dev.ixl.0.%desc: Intel(R) Ethernet Connection 700 Series PF Driver, Version -
1.12.40

pciconf -lv ixl0
ixl0@pci0:65:0:0:       class=0x020000 rev=0x02 hdr=0x00 vendor=0x8086
device=0x1583 subvendor=0x15d9 subdevice=0x084a
    vendor     = 'Intel Corporation'
    device     = 'Ethernet Controller XL710 for 40GbE QSFP+'
    class      = network
    subclass   = ethernet

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