imx8 PCI regression since "iommu: Get DT/ACPI parsing into the proper probe path"

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* imx8 PCI regression since "iommu: Get DT/ACPI parsing into the proper probe path"
@ 2026-01-09 16:22 Nicolas Cavallari
  2026-01-13  9:17 ` Nicolas Cavallari
  0 siblings, 1 reply; 8+ messages in thread
From: Nicolas Cavallari @ 2026-01-09 16:22 UTC (permalink / raw)
  To: iommu, linux-pci, linux-arm-kernel

When upgrading from 6.12 to a 6.18 kernel, I noticed that a PCI
Ethernet adapter (Microchip LAN7430) would hang under load and not
recover.  When that happens, some of its registers indicate it is
failing to do DMA reads, so cannot reclaim entries on its ring buffer.

I bisected the problem into this commit:

commit bcb81ac6ae3c2ef95b44e7b54c3c9522364a245c
Author: Robin Murphy <robin.murphy@arm.com>
Date:   Fri Feb 28 15:46:33 2025 +0000

     iommu: Get DT/ACPI parsing into the proper probe path

The problem still exists on 6.19-rc1, on pci/next (29a77b4897f1) and on
iommu/master (360e85353769) trees.  Reverting the commit fixes the issue.

The system is a Gateworks GW7200, which is a i.MX 8 Mini connected to a Pericom
PI7C9X2G404 4-port switch connected to the LAN7430 chip.

-[0000:00]---00.0-[01-ff]----00.0-[02-05]--+-01.0-[03]----00.0
                                            +-02.0-[04]--
                                            \-03.0-[05]----00.0

The problem only occurs when there is at least another PCI device in use on the
switch.  It does not happen if the LAN7430 is the only PCI device, or if the
other devices are not actively used.  For example i can reproduce it with an
ath9k wireless network adapter when it is up and running, but not when it is
down or its driver is not loaded.

I suspect that other PCI devices have similar issues, but the LAN7430 is the
easiest one to diagnose, as it hangs within seconds with an iperf3 --bidir -u
-b 200M and its register map are public.

I couldn't find an way to dump the PCI address translation mapping from
userspace.
I would be happy to provide more information or test patches.

---- lspci -v

00:00.0 PCI bridge: Synopsys, Inc. DWC_usb3 / PCIe bridge (rev 01) (prog-if 00 
[Normal decode])
         Device tree node: 
/sys/firmware/devicetree/base/soc@0/pcie@33800000/pcie@0,0
         Flags: bus master, fast devsel, latency 0, IRQ 202
         Memory at 18000000 (32-bit, non-prefetchable) [size=1M]
         Bus: primary=00, secondary=01, subordinate=ff, sec-latency=0
         I/O behind bridge: [disabled] [16-bit]
         Memory behind bridge: 18100000-182fffff [size=2M] [32-bit]
         Prefetchable memory behind bridge: [disabled] [32-bit]
         Expansion ROM at 18300000 [virtual] [disabled] [size=64K]
         Capabilities: [40] Power Management version 3
         Capabilities: [50] MSI: Enable+ Count=1/1 Maskable+ 64bit+
         Capabilities: [70] Express Root Port (Slot-), IntMsgNum 0
         Capabilities: [100] Advanced Error Reporting
         Capabilities: [148] L1 PM Substates
         Kernel driver in use: pcieport

01:00.0 PCI bridge: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4-Port/4-Lane 
Packet Switch (rev 01) (prog-if 00 [Normal decode])
         Device tree node: 
/sys/firmware/devicetree/base/soc@0/pcie@33800000/pcie@0,0/pcie@0,0
         Flags: bus master, fast devsel, latency 0
         Bus: primary=01, secondary=02, subordinate=05, sec-latency=0
         I/O behind bridge: [disabled] [32-bit]
         Memory behind bridge: 18100000-182fffff [size=2M] [32-bit]
         Prefetchable memory behind bridge: [disabled] [64-bit]
         Capabilities: [40] Power Management version 3
         Capabilities: [4c] MSI: Enable- Count=1/4 Maskable+ 64bit+
         Capabilities: [64] Vendor Specific Information: Len=34 <?>
         Capabilities: [b0] Subsystem: Device 0000:0000
         Capabilities: [c0] Express Upstream Port, IntMsgNum 0
         Capabilities: [100] Advanced Error Reporting
         Capabilities: [140] Virtual Channel
         Capabilities: [20c] Power Budgeting <?>
         Capabilities: [230] Latency Tolerance Reporting
         Capabilities: [240] L1 PM Substates
         Capabilities: [260] Precision Time Measurement
         Kernel driver in use: pcieport

02:01.0 PCI bridge: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4-Port/4-Lane 
Packet Switch (rev 01) (prog-if 00 [Normal decode])
         Flags: bus master, fast devsel, latency 0
         Bus: primary=02, secondary=03, subordinate=03, sec-latency=0
         I/O behind bridge: [disabled] [32-bit]
         Memory behind bridge: 18100000-181fffff [size=1M] [32-bit]
         Prefetchable memory behind bridge: [disabled] [64-bit]
         Capabilities: [40] Power Management version 3
         Capabilities: [4c] MSI: Enable- Count=1/4 Maskable+ 64bit+
         Capabilities: [64] Vendor Specific Information: Len=34 <?>
         Capabilities: [b0] Subsystem: Device 0000:0000
         Capabilities: [c0] Express Downstream Port (Slot+), IntMsgNum 0
         Capabilities: [100] Advanced Error Reporting
         Capabilities: [140] Virtual Channel
         Capabilities: [20c] Power Budgeting <?>
         Capabilities: [220] Access Control Services
         Capabilities: [240] L1 PM Substates
         Capabilities: [250] Downstream Port Containment
         Kernel driver in use: pcieport

02:02.0 PCI bridge: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4-Port/4-Lane 
Packet Switch (rev 01) (prog-if 00 [Normal decode])
         Flags: bus master, fast devsel, latency 0, IRQ 203
         Bus: primary=02, secondary=04, subordinate=04, sec-latency=0
         I/O behind bridge: [disabled] [32-bit]
         Memory behind bridge: [disabled] [32-bit]
         Prefetchable memory behind bridge: [disabled] [64-bit]
         Capabilities: [40] Power Management version 3
         Capabilities: [4c] MSI: Enable+ Count=1/4 Maskable+ 64bit+
         Capabilities: [64] Vendor Specific Information: Len=34 <?>
         Capabilities: [b0] Subsystem: Device 0000:0000
         Capabilities: [c0] Express Downstream Port (Slot+), IntMsgNum 0
         Capabilities: [100] Advanced Error Reporting
         Capabilities: [140] Virtual Channel
         Capabilities: [20c] Power Budgeting <?>
         Capabilities: [220] Access Control Services
         Capabilities: [240] L1 PM Substates
         Capabilities: [250] Downstream Port Containment
         Kernel driver in use: pcieport

02:03.0 PCI bridge: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4-Port/4-Lane 
Packet Switch (rev 01) (prog-if 00 [Normal decode])
         Device tree node: 
/sys/firmware/devicetree/base/soc@0/pcie@33800000/pcie@0,0/pcie@0,0/pcie@3,0
         Flags: bus master, fast devsel, latency 0
         Bus: primary=02, secondary=05, subordinate=05, sec-latency=0
         I/O behind bridge: [disabled] [32-bit]
         Memory behind bridge: 18200000-182fffff [size=1M] [32-bit]
         Prefetchable memory behind bridge: [disabled] [64-bit]
         Capabilities: [40] Power Management version 3
         Capabilities: [4c] MSI: Enable- Count=1/4 Maskable+ 64bit+
         Capabilities: [64] Vendor Specific Information: Len=34 <?>
         Capabilities: [b0] Subsystem: Device 0000:0000
         Capabilities: [c0] Express Downstream Port (Slot+), IntMsgNum 0
         Capabilities: [100] Advanced Error Reporting
         Capabilities: [140] Virtual Channel
         Capabilities: [20c] Power Budgeting <?>
         Capabilities: [220] Access Control Services
         Capabilities: [240] L1 PM Substates
         Capabilities: [250] Downstream Port Containment
         Kernel driver in use: pcieport

03:00.0 Network controller: Qualcomm Atheros AR93xx Wireless Network Adapter 
(rev 01)
         Subsystem: Qualcomm Atheros Device 3116
         Flags: bus master, fast devsel, latency 0, IRQ 201
         Memory at 18100000 (64-bit, non-prefetchable) [size=128K]
         Expansion ROM at 18120000 [virtual] [disabled] [size=64K]
         Capabilities: [40] Power Management version 3
         Capabilities: [50] MSI: Enable- Count=1/4 Maskable+ 64bit+
         Capabilities: [70] Express Endpoint, IntMsgNum 0
         Capabilities: [100] Advanced Error Reporting
         Capabilities: [140] Virtual Channel
         Capabilities: [300] Device Serial Number 00-00-00-00-00-00-00-00
         Kernel driver in use: ath9k
         Kernel modules: ath9k

05:00.0 Ethernet controller: Microchip Technology / SMSC LAN7430 (rev 11)
         Subsystem: Microchip Technology / SMSC LAN7430
         Device tree node: 
/sys/firmware/devicetree/base/soc@0/pcie@33800000/pcie@0,0/pcie@0,0/pcie@3,0/ethernet@0,0
         Flags: bus master, fast devsel, latency 0, IRQ 201
         Memory at 18200000 (64-bit, non-prefetchable) [size=8K]
         Memory at 18202000 (64-bit, non-prefetchable) [size=256]
         Memory at 18202100 (64-bit, non-prefetchable) [size=256]
         Capabilities: [40] Power Management version 3
         Capabilities: [50] MSI: Enable- Count=1/8 Maskable+ 64bit+
         Capabilities: [70] Express Endpoint, IntMsgNum 0
         Capabilities: [b0] MSI-X: Enable+ Count=8 Masked-
         Capabilities: [100] Advanced Error Reporting
         Capabilities: [148] Device Serial Number (the EUI64 of the card)
         Capabilities: [158] Latency Tolerance Reporting
         Capabilities: [160] L1 PM Substates
         Capabilities: [170] Vendor Specific Information: ID=0002 Rev=4 Len=100 <?>
         Kernel driver in use: lan743x
         Kernel modules: lan743x

---- dmesg:

Booting Linux on physical CPU 0x0000000000 [0x410fd034]
Linux version 6.19.0-rc1 (buildroot@buildroot) 
(aarch64-buildroot-linux-musl-gcc.br_real (Buildroot 
2025.11-rc2-7266-g8a41889b4d) 14.3.0, GNU ld (GNU Binutils) 2.43.1) #1 SMP 
PREEMPT Thu Dec 11 22:43:20 UTC 2025
KASLR disabled due to lack of seed
Machine model: Gateworks Venice GW72xx-0x i.MX8MM Development Kit
OF: reserved mem: Reserved memory: No reserved-memory node in the DT
Zone ranges:
   DMA      [mem 0x0000000040000000-0x00000000ffffffff]
   DMA32    empty
   Normal   [mem 0x0000000100000000-0x000000013fffffff]
Movable zone start for each node
Early memory node ranges
   node   0: [mem 0x0000000040000000-0x000000013fffffff]
Initmem setup node 0 [mem 0x0000000040000000-0x000000013fffffff]
cma: Reserved 32 MiB at 0x00000000fe000000
psci: probing for conduit method from DT.
psci: PSCIv1.1 detected in firmware.
psci: Using standard PSCI v0.2 function IDs
psci: MIGRATE_INFO_TYPE not supported.
psci: SMC Calling Convention v1.5
percpu: Embedded 22 pages/cpu s49304 r8192 d32616 u90112
pcpu-alloc: s49304 r8192 d32616 u90112 alloc=22*4096
pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
Detected VIPT I-cache on CPU0
CPU features: detected: GICv3 CPU interface
CPU features: detected: ARM erratum 845719
alternatives: applying boot alternatives
Kernel command line: root=/dev/mmcblk2p6 rootrw=/dev/mmcblk2p8 rootrwfstype=ext4 
persistmnt=/dev/mmcblk2p7 persistmntfstype=ext4 init=/sbin/wrap-init
Unknown kernel command line parameters "rootrw=/dev/mmcblk2p8 rootrwfstype=ext4 
persistmnt=/dev/mmcblk2p7 persistmntfstype=ext4", will be passed to user space.
printk: log buffer data + meta data: 131072 + 458752 = 589824 bytes
Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes, linear)
Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes, linear)
software IO TLB: area num 4.
software IO TLB: mapped [mem 0x00000000fa000000-0x00000000fe000000] (64MB)
Built 1 zonelists, mobility grouping on.  Total pages: 1048576
mem auto-init: stack:off, heap alloc:off, heap free:off
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
rcu: Preemptible hierarchical RCU implementation.
rcu: 	RCU event tracing is enabled.
rcu: 	RCU restricting CPUs from NR_CPUS=256 to nr_cpu_ids=4.
	Trampoline variant of Tasks RCU enabled.
	Tracing variant of Tasks RCU enabled.
rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
RCU Tasks: Setting shift to 2 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=4.
RCU Tasks Trace: Setting shift to 2 and lim to 1 rcu_task_cb_adjust=1 
rcu_task_cpu_ids=4.
NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
GICv3: GIC: Using split EOI/Deactivate mode
GICv3: 128 SPIs implemented
GICv3: 0 Extended SPIs implemented
Root IRQ handler: gic_handle_irq
GICv3: GICv3 features: 16 PPIs
GICv3: GICD_CTLR.DS=0, SCR_EL3.FIQ=1
GICv3: CPU0: found redistributor 0 region 0:0x0000000038880000
ITS: No ITS available, not enabling LPIs
rcu: srcu_init: Setting srcu_struct sizes based on contention.
arch_timer: cp15 timer running at 8.00MHz (phys).
clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x1d854df40, 
max_idle_ns: 440795202120 ns
sched_clock: 56 bits at 8MHz, resolution 125ns, wraps every 2199023255500ns
Console: colour dummy device 80x25
printk: legacy console [tty0] enabled
Calibrating delay loop (skipped), value calculated using timer frequency.. 16.00 
BogoMIPS (lpj=32000)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 8192 (order: 4, 65536 bytes, linear)
Mountpoint-cache hash table entries: 8192 (order: 4, 65536 bytes, linear)
rcu: Hierarchical SRCU implementation.
rcu: 	Max phase no-delay instances is 1000.
Timer migration: 1 hierarchy levels; 8 children per group; 1 crossnode level
smp: Bringing up secondary CPUs ...
Detected VIPT I-cache on CPU1
GICv3: CPU1: found redistributor 1 region 0:0x00000000388a0000
CPU1: Booted secondary processor 0x0000000001 [0x410fd034]
Detected VIPT I-cache on CPU2
GICv3: CPU2: found redistributor 2 region 0:0x00000000388c0000
CPU2: Booted secondary processor 0x0000000002 [0x410fd034]
Detected VIPT I-cache on CPU3
GICv3: CPU3: found redistributor 3 region 0:0x00000000388e0000
CPU3: Booted secondary processor 0x0000000003 [0x410fd034]
smp: Brought up 1 node, 4 CPUs
SMP: Total of 4 processors activated.
CPU: All CPU(s) started at EL2
CPU features: detected: 32-bit EL0 Support
CPU features: detected: CRC32 instructions
CPU features: detected: PMUv3
alternatives: applying system-wide alternatives
Memory: 3998528K/4194304K available (8384K kernel code, 888K rwdata, 2348K 
rodata, 896K init, 337K bss, 159960K reserved, 32768K cma-reserved)
devtmpfs: initialized
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 
7645041785100000 ns
posixtimers hash table entries: 2048 (order: 3, 32768 bytes, linear)
futex hash table entries: 1024 (65536 bytes on 1 NUMA nodes, total 64 KiB, linear).
29504 pages in range for non-PLT usage
521024 pages in range for PLT usage
NET: Registered PF_NETLINK/PF_ROUTE protocol family
DMA: preallocated 512 KiB GFP_KERNEL pool for atomic allocations
DMA: preallocated 512 KiB GFP_KERNEL|GFP_DMA pool for atomic allocations
DMA: preallocated 512 KiB GFP_KERNEL|GFP_DMA32 pool for atomic allocations
thermal_sys: Registered thermal governor 'step_wise'
cpuidle: using governor menu
hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
ASID allocator initialised with 65536 entries
/soc@0: Fixed dependency cycle(s) with 
/soc@0/bus@30000000/efuse@30350000/unique-id@4
/soc@0/interrupt-controller@38800000: Fixed dependency cycle(s) with 
/soc@0/interrupt-controller@38800000
/soc@0/bus@30000000/pinctrl@30330000: Fixed dependency cycle(s) with 
/soc@0/bus@30000000/pinctrl@30330000/hoggrp
imx8mm-pinctrl 30330000.pinctrl: initialized IMX pinctrl driver
/soc@0/bus@30000000/efuse@30350000: Fixed dependency cycle(s) with 
/soc@0/bus@30000000/clock-controller@30380000
/soc@0/bus@30000000/efuse@30350000: Fixed dependency cycle(s) with 
/soc@0/bus@30000000/clock-controller@30380000
/soc@0/bus@30000000/clock-controller@30380000: Fixed dependency cycle(s) with 
/soc@0/interrupt-controller@38800000
iommu: Default domain type: Translated
iommu: DMA domain TLB invalidation policy: strict mode
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti 
<giometti@linux.it>
EDAC MC: Ver: 3.0.0
vgaarb: loaded
clocksource: Switched to clocksource arch_sys_counter
VFS: Disk quotas dquot_6.6.0
VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
NET: Registered PF_INET protocol family
IP idents hash table entries: 65536 (order: 7, 524288 bytes, linear)
tcp_listen_portaddr_hash hash table entries: 2048 (order: 3, 32768 bytes, linear)
Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear)
TCP established hash table entries: 32768 (order: 6, 262144 bytes, linear)
TCP bind hash table entries: 32768 (order: 8, 1048576 bytes, linear)
TCP: Hash tables configured (established 32768 bind 32768)
UDP hash table entries: 2048 (order: 5, 131072 bytes, linear)
UDP-Lite hash table entries: 2048 (order: 5, 131072 bytes, linear)
NET: Registered PF_UNIX/PF_LOCAL protocol family
PCI: CLS 0 bytes, default 64
ARM FF-A: FFA_VERSION returned not supported
Initialise system trusted keyrings
workingset: timestamp_bits=62 max_order=20 bucket_order=0
squashfs: version 4.0 (2009/01/31) Phillip Lougher
Key type asymmetric registered
Asymmetric key parser 'x509' registered
io scheduler mq-deadline registered
io scheduler kyber registered
mxs-dma 33000000.dma-controller: initialized
SoC: i.MX8MM revision 1.0
30860000.serial: ttymxc0 at MMIO 0x30860000 (irq = 15, base_baud = 1500000) is a IMX
30880000.serial: ttymxc2 at MMIO 0x30880000 (irq = 16, base_baud = 1500000) is a IMX
30890000.serial: ttymxc1 at MMIO 0x30890000 (irq = 17, base_baud = 1500000) is a IMX
imx-uart 30890000.serial: Console IMX rounded baud rate from 114286 to 114300
printk: console [ttymxc1] enabled
30a60000.serial: ttymxc3 at MMIO 0x30a60000 (irq = 18, base_baud = 1500000) is a IMX
wireguard: WireGuard 1.0.0 loaded. See www.wireguard.com for information.
wireguard: Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All 
Rights Reserved.
i2c_dev: i2c /dev entries driver
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
sdhci-pltfm: SDHCI platform and OF driver helper
SMCCC: SOC_ID: ARCH_SOC_ID not implemented, skipping ....
caam 30900000.crypto: Entropy delay = 3200
caam 30900000.crypto: Entropy delay = 6400
caam 30900000.crypto: Instantiated RNG4 SH0
mmc2: SDHCI controller on 30b60000.mmc [30b60000.mmc] using ADMA
caam 30900000.crypto: Instantiated RNG4 SH1
caam 30900000.crypto: device ID = 0x0a16040100000000 (Era 9)
caam 30900000.crypto: job rings = 2, qi = 0
trusted_key: caam algorithms registered in /proc/crypto
caam 30900000.crypto: registering rng-caam
caam 30900000.crypto: rng crypto API alg registered prng-caam
mmc2: new HS400 Enhanced strobe MMC card at address 0001
mmcblk2: mmc2:0001 IY2964 58.3 GiB
hw perfevents: enabled with armv8_cortex_a53 PMU driver, 7 (0,8000003f) counters 
available
nvmem imx-ocotp0: cell mac-address raw len 6 unaligned to nvmem word size 4
/soc@0: Fixed dependency cycle(s) with /soc@0/bus@30000000/efuse@30350000
NET: Registered PF_INET6 protocol family
  mmcblk2: p1 p2 < p5 p6 p7 p8 p9 >
Segment Routing with IPv6
In-situ OAM (IOAM) with IPv6
NET: Registered PF_PACKET protocol family
mmcblk2boot0: mmc2:0001 IY2964 4.00 MiB
registered taskstats version 1
Loading compiled-in X.509 certificates
mmcblk2boot1: mmc2:0001 IY2964 4.00 MiB
mmcblk2rpmb: mmc2:0001 IY2964 4.00 MiB, chardev (249:0)
gpio gpiochip0: Static allocation of GPIO base is deprecated, use dynamic 
allocation.
gpio gpiochip1: Static allocation of GPIO base is deprecated, use dynamic 
allocation.
random: crng init done
gpio gpiochip2: Static allocation of GPIO base is deprecated, use dynamic 
allocation.
gpio gpiochip3: Static allocation of GPIO base is deprecated, use dynamic 
allocation.
gpio gpiochip4: Static allocation of GPIO base is deprecated, use dynamic 
allocation.
i2c i2c-0: using pinctrl states for GPIO recovery
i2c i2c-0: using generic GPIOs for recovery
gateworks-gsc 0-0020: Gateworks System Controller v66: fw 0xa691
pca953x 0-0023: supply vcc not found, using dummy regulator
pca953x 0-0023: using no auto increment
at24 0-0050: supply vcc not found, using dummy regulator
at24 0-0050: 256 byte 24c02 EEPROM, writable, 16 bytes/write
at24 0-0051: supply vcc not found, using dummy regulator
at24 0-0051: 256 byte 24c02 EEPROM, writable, 16 bytes/write
at24 0-0052: supply vcc not found, using dummy regulator
at24 0-0052: 256 byte 24c02 EEPROM, writable, 16 bytes/write
at24 0-0053: supply vcc not found, using dummy regulator
at24 0-0053: 256 byte 24c02 EEPROM, writable, 16 bytes/write
rtc-ds1672 0-0068: registered as rtc0
rtc-ds1672 0-0068: setting system clock to 2026-01-09T14:32:53 UTC (1767969173)
i2c i2c-0: IMX I2C adapter registered
i2c i2c-1: using generic GPIOs for recovery
at24 1-0052: supply vcc not found, using dummy regulator
at24 1-0052: 4096 byte 24c32 EEPROM, writable, 32 bytes/write
i2c i2c-1: IMX I2C adapter registered
i2c i2c-2: IMX I2C adapter registered
imx6q-pcie 33800000.pcie: host bridge /soc@0/pcie@33800000 ranges:
imx6q-pcie 33800000.pcie: Parsing ranges property...
imx6q-pcie 33800000.pcie:       IO 0x001ff80000..0x001ff8ffff -> 0x0000000000
imx6q-pcie 33800000.pcie:      MEM 0x0018000000..0x001fefffff -> 0x0018000000
imx6q-pcie 33800000.pcie: config reg[1] 0x1ff00000 == cpu 0x1ff00000
; no fixup was ever needed for this devicetree
imx-cpufreq-dt imx-cpufreq-dt: cpu speed grade 2 mkt segment 2 supported-hw 0x4 0x4
clk: Disabling unused clocks
PM: genpd: Disabling unused power domains
sdhci-esdhc-imx 30b50000.mmc: Got CD GPIO
check access for rdinit=/init failed: -2, ignoring
mmc1: SDHCI controller on 30b50000.mmc [30b50000.mmc] using ADMA
imx6q-pcie 33800000.pcie: Using 32 MSI vectors
imx6q-pcie 33800000.pcie: iATU: unroll T, 4 ob, 4 ib, align 64K, limit 4G
imx6q-pcie 33800000.pcie: PCIe Gen.2 x1 link up
imx6q-pcie 33800000.pcie: PCI host bridge to bus 0000:00
pci_bus 0000:00: root bus resource [bus 00-ff]
pci_bus 0000:00: root bus resource [io  0x0000-0xffff]
pci_bus 0000:00: root bus resource [mem 0x18000000-0x1fefffff]
pci_bus 0000:00: scanning bus
pci 0000:00:00.0: [16c3:abcd] type 01 class 0x060400 PCIe Root Port
pci 0000:00:00.0: BAR 0 [mem 0x00000000-0x000fffff]
pci 0000:00:00.0: ROM [mem 0x00000000-0x0000ffff pref]
pci 0000:00:00.0: PCI bridge to [bus 01-ff]
pci 0000:00:00.0:   bridge window [io  0x0000-0x0fff]
pci 0000:00:00.0:   bridge window [mem 0x00000000-0x000fffff]
pci 0000:00:00.0:   bridge window [mem 0x00000000-0x000fffff pref]
pci 0000:00:00.0: supports D1
pci 0000:00:00.0: PME# supported from D0 D1 D3hot D3cold
pci 0000:00:00.0: PME# disabled
pci 0000:00:00.0: vgaarb: pci_notify
pci_bus 0000:00: fixups for bus
pci 0000:00:00.0: scanning [bus 01-ff] behind bridge, pass 0
pci_bus 0000:01: scanning bus
pci 0000:01:00.0: [12d8:b404] type 01 class 0x060400 PCIe Switch Upstream Port
pci 0000:01:00.0: PCI bridge to [bus 00]
pci 0000:01:00.0:   bridge window [io  0x0000-0x0fff]
pci 0000:01:00.0:   bridge window [mem 0x00000000-0x000fffff]
pci 0000:01:00.0:   bridge window [mem 0x00000000-0x000fffff 64bit pref]
pci 0000:01:00.0: supports D1 D2
pci 0000:01:00.0: PME# supported from D0 D1 D2 D3hot D3cold
pci 0000:01:00.0: PME# disabled
pci 0000:01:00.0: PTM enabled (root), unknown granularity
pci 0000:01:00.0: vgaarb: pci_notify
pci 0000:01:00.0: ASPM: default states L0s L1
pci_bus 0000:01: fixups for bus
pci 0000:01:00.0: scanning [bus 00-00] behind bridge, pass 0
pci 0000:01:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
pci 0000:01:00.0: scanning [bus 00-00] behind bridge, pass 1
pci_bus 0000:02: scanning bus
pci 0000:02:01.0: [12d8:b404] type 01 class 0x060400 PCIe Switch Downstream Port
pci 0000:02:01.0: PCI bridge to [bus 00]
pci 0000:02:01.0:   bridge window [io  0x0000-0x0fff]
pci 0000:02:01.0:   bridge window [mem 0x00000000-0x000fffff]
pci 0000:02:01.0:   bridge window [mem 0x00000000-0x000fffff 64bit pref]
pci 0000:02:01.0: supports D1 D2
pci 0000:02:01.0: PME# supported from D0 D1 D2 D3hot D3cold
pci 0000:02:01.0: PME# disabled
pci 0000:02:01.0: vgaarb: pci_notify
pci 0000:02:02.0: [12d8:b404] type 01 class 0x060400 PCIe Switch Downstream Port
pci 0000:02:02.0: PCI bridge to [bus 00]
pci 0000:02:02.0:   bridge window [io  0x0000-0x0fff]
pci 0000:02:02.0:   bridge window [mem 0x00000000-0x000fffff]
pci 0000:02:02.0:   bridge window [mem 0x00000000-0x000fffff 64bit pref]
pci 0000:02:02.0: supports D1 D2
pci 0000:02:02.0: PME# supported from D0 D1 D2 D3hot D3cold
pci 0000:02:02.0: PME# disabled
pci 0000:02:02.0: vgaarb: pci_notify
pci 0000:02:03.0: [12d8:b404] type 01 class 0x060400 PCIe Switch Downstream Port
pci 0000:02:03.0: PCI bridge to [bus 00]
pci 0000:02:03.0:   bridge window [io  0x0000-0x0fff]
pci 0000:02:03.0:   bridge window [mem 0x00000000-0x000fffff]
pci 0000:02:03.0:   bridge window [mem 0x00000000-0x000fffff 64bit pref]
pci 0000:02:03.0: supports D1 D2
pci 0000:02:03.0: PME# supported from D0 D1 D2 D3hot D3cold
pci 0000:02:03.0: PME# disabled
pci 0000:02:03.0: vgaarb: pci_notify
pci_bus 0000:02: fixups for bus
pci 0000:02:01.0: scanning [bus 00-00] behind bridge, pass 0
pci 0000:02:01.0: bridge configuration invalid ([bus 00-00]), reconfiguring
pci 0000:02:02.0: scanning [bus 00-00] behind bridge, pass 0
pci 0000:02:02.0: bridge configuration invalid ([bus 00-00]), reconfiguring
pci 0000:02:03.0: scanning [bus 00-00] behind bridge, pass 0
pci 0000:02:03.0: bridge configuration invalid ([bus 00-00]), reconfiguring
pci 0000:02:01.0: scanning [bus 00-00] behind bridge, pass 1
pci_bus 0000:03: scanning bus
pci 0000:03:00.0: [168c:0030] type 00 class 0x028000 PCIe Endpoint
pci 0000:03:00.0: BAR 0 [mem 0x00000000-0x0001ffff 64bit]
pci 0000:03:00.0: ROM [mem 0x00000000-0x0000ffff pref]
pci 0000:03:00.0: supports D1
pci 0000:03:00.0: PME# supported from D0 D1 D3hot
pci 0000:03:00.0: PME# disabled
pci 0000:03:00.0: vgaarb: pci_notify
pci 0000:03:00.0: ASPM: default states L0s L1
pci_bus 0000:03: fixups for bus
pci_bus 0000:03: bus scan returning with max=03
pci_bus 0000:03: busn_res: [bus 03-ff] end is updated to 03
pci 0000:02:02.0: scanning [bus 00-00] behind bridge, pass 1
pci_bus 0000:04: scanning bus
pci_bus 0000:04: fixups for bus
pci_bus 0000:04: bus scan returning with max=04
pci_bus 0000:04: busn_res: [bus 04-ff] end is updated to 04
pci 0000:02:03.0: scanning [bus 00-00] behind bridge, pass 1
pci_bus 0000:05: scanning bus
pci 0000:05:00.0: [1055:7430] type 00 class 0x020000 PCIe Endpoint
pci 0000:05:00.0: BAR 0 [mem 0x00000000-0x00001fff 64bit]
pci 0000:05:00.0: BAR 2 [mem 0x00000000-0x000000ff 64bit]
pci 0000:05:00.0: BAR 4 [mem 0x00000000-0x000000ff 64bit]
pci 0000:05:00.0: PME# supported from D0 D3hot
pci 0000:05:00.0: PME# disabled
pci 0000:05:00.0: vgaarb: pci_notify
pci 0000:05:00.0: ASPM: default states L0s L1
pci_bus 0000:05: fixups for bus
pci_bus 0000:05: bus scan returning with max=05
pci_bus 0000:05: busn_res: [bus 05-ff] end is updated to 05
pci_bus 0000:02: bus scan returning with max=05
pci_bus 0000:02: busn_res: [bus 02-ff] end is updated to 05
pci_bus 0000:01: bus scan returning with max=05
pci 0000:00:00.0: scanning [bus 01-ff] behind bridge, pass 1
pci_bus 0000:00: bus scan returning with max=ff
pci 0000:02:01.0: bridge window [mem 0x00100000-0x001fffff] to [bus 03] requires 
relaxed alignment rules
pci 0000:02:01.0: bridge window [mem 0x00100000-0x001fffff] to [bus 03] requires 
relaxed alignment rules
pci 0000:02:03.0: bridge window [mem 0x00100000-0x001fffff] to [bus 05] requires 
relaxed alignment rules
pci 0000:00:00.0: BAR 0 [mem 0x18000000-0x180fffff]: assigned
pci 0000:00:00.0: bridge window [mem 0x18100000-0x182fffff]: assigned
pci 0000:00:00.0: ROM [mem 0x18300000-0x1830ffff pref]: assigned
pci 0000:01:00.0: bridge window [mem 0x18100000-0x182fffff]: assigned
pci 0000:02:01.0: bridge window [mem 0x18100000-0x181fffff]: assigned
pci 0000:02:03.0: bridge window [mem 0x18200000-0x182fffff]: assigned
pci 0000:03:00.0: BAR 0 [mem 0x18100000-0x1811ffff 64bit]: assigned
pci 0000:03:00.0: ROM [mem 0x18120000-0x1812ffff pref]: assigned
pci 0000:02:01.0: PCI bridge to [bus 03]
pci 0000:02:01.0:   bridge window [mem 0x18100000-0x181fffff]
pci 0000:02:02.0: PCI bridge to [bus 04]
pci 0000:05:00.0: BAR 0 [mem 0x18200000-0x18201fff 64bit]: assigned
pci 0000:05:00.0: BAR 2 [mem 0x18202000-0x182020ff 64bit]: assigned
pci 0000:05:00.0: BAR 4 [mem 0x18202100-0x182021ff 64bit]: assigned
pci 0000:02:03.0: PCI bridge to [bus 05]
pci 0000:02:03.0:   bridge window [mem 0x18200000-0x182fffff]
pci 0000:01:00.0: PCI bridge to [bus 02-05]
pci 0000:01:00.0:   bridge window [mem 0x18100000-0x182fffff]
pci 0000:00:00.0: PCI bridge to [bus 01-ff]
pci 0000:00:00.0:   bridge window [mem 0x18100000-0x182fffff]
pci_bus 0000:00: resource 4 [io  0x0000-0xffff]
pci_bus 0000:00: resource 5 [mem 0x18000000-0x1fefffff]
pci_bus 0000:01: resource 1 [mem 0x18100000-0x182fffff]
pci_bus 0000:02: resource 1 [mem 0x18100000-0x182fffff]
pci_bus 0000:03: resource 1 [mem 0x18100000-0x181fffff]
pci_bus 0000:05: resource 1 [mem 0x18200000-0x182fffff]
pci 0000:00:00.0: save config 0x00: 0xabcd16c3
pci 0000:00:00.0: save config 0x04: 0x00100107
pci 0000:00:00.0: save config 0x08: 0x06040001
pci 0000:00:00.0: save config 0x0c: 0x00010000
pci 0000:00:00.0: save config 0x10: 0x18000000
pci 0000:00:00.0: save config 0x14: 0x00000000
pci 0000:00:00.0: save config 0x18: 0x00ff0100
pci 0000:00:00.0: save config 0x1c: 0x000000f0
pci 0000:00:00.0: save config 0x20: 0x18201810
pci 0000:00:00.0: save config 0x24: 0x0000fff0
pci 0000:00:00.0: save config 0x28: 0x00000000
pci 0000:00:00.0: save config 0x2c: 0x00000000
pci 0000:00:00.0: save config 0x30: 0x00000000
pci 0000:00:00.0: save config 0x34: 0x00000040
pci 0000:00:00.0: save config 0x38: 0x00000000
pci 0000:00:00.0: save config 0x3c: 0x000201ff
pcieport 0000:00:00.0: vgaarb: pci_notify
pcieport 0000:00:00.0: assign IRQ: got 201
imx6q-pcie 33800000.pcie: msi#0 address_hi 0x0 address_lo 0x4007e000
pcieport 0000:00:00.0: PME: Signaling with IRQ 202
pcieport 0000:00:00.0: AER: enabled with IRQ 202
pcieport 0000:00:00.0: bwctrl: enabled with IRQ 202
pcieport 0000:00:00.0: save config 0x00: 0xabcd16c3
pcieport 0000:00:00.0: save config 0x04: 0x00100507
pcieport 0000:00:00.0: save config 0x08: 0x06040001
pcieport 0000:00:00.0: save config 0x0c: 0x00010000
pcieport 0000:00:00.0: save config 0x10: 0x18000000
pcieport 0000:00:00.0: save config 0x14: 0x00000000
pcieport 0000:00:00.0: save config 0x18: 0x00ff0100
pcieport 0000:00:00.0: save config 0x1c: 0x000000f0
pcieport 0000:00:00.0: save config 0x20: 0x18201810
pcieport 0000:00:00.0: save config 0x24: 0x0000fff0
pcieport 0000:00:00.0: save config 0x28: 0x00000000
pcieport 0000:00:00.0: save config 0x2c: 0x00000000
pcieport 0000:00:00.0: save config 0x30: 0x00000000
pcieport 0000:00:00.0: save config 0x34: 0x00000040
pcieport 0000:00:00.0: save config 0x38: 0x00000000
pcieport 0000:00:00.0: save config 0x3c: 0x000201c9
pcieport 0000:00:00.0: vgaarb: pci_notify
pci 0000:01:00.0: save config 0x00: 0xb40412d8
pci 0000:01:00.0: save config 0x04: 0x00100000
pci 0000:01:00.0: save config 0x08: 0x06040001
pci 0000:01:00.0: save config 0x0c: 0x00010000
pci 0000:01:00.0: save config 0x10: 0x00000000
pci 0000:01:00.0: save config 0x14: 0x00000000
pci 0000:01:00.0: save config 0x18: 0x00050201
pci 0000:01:00.0: save config 0x1c: 0x000001f1
pci 0000:01:00.0: save config 0x20: 0x18201810
pci 0000:01:00.0: save config 0x24: 0x0001fff1
pci 0000:01:00.0: save config 0x28: 0x00000000
pci 0000:01:00.0: save config 0x2c: 0x00000000
pci 0000:01:00.0: save config 0x30: 0x00000000
pci 0000:01:00.0: save config 0x34: 0x00000040
pci 0000:01:00.0: save config 0x38: 0x00000000
pci 0000:01:00.0: save config 0x3c: 0x00020000
pcieport 0000:01:00.0: vgaarb: pci_notify
pcieport 0000:01:00.0: assign IRQ: got 0
pcieport 0000:01:00.0: enabling device (0000 -> 0002)
pcieport 0000:01:00.0: save config 0x00: 0xb40412d8
pcieport 0000:01:00.0: save config 0x04: 0x00100002
pcieport 0000:01:00.0: save config 0x08: 0x06040001
pcieport 0000:01:00.0: save config 0x0c: 0x00010000
pcieport 0000:01:00.0: save config 0x10: 0x00000000
pcieport 0000:01:00.0: save config 0x14: 0x00000000
pcieport 0000:01:00.0: save config 0x18: 0x00050201
pcieport 0000:01:00.0: save config 0x1c: 0x000001f1
pcieport 0000:01:00.0: save config 0x20: 0x18201810
pcieport 0000:01:00.0: save config 0x24: 0x0001fff1
pcieport 0000:01:00.0: save config 0x28: 0x00000000
pcieport 0000:01:00.0: save config 0x2c: 0x00000000
pcieport 0000:01:00.0: save config 0x30: 0x00000000
pcieport 0000:01:00.0: save config 0x34: 0x00000040
pcieport 0000:01:00.0: save config 0x38: 0x00000000
pcieport 0000:01:00.0: save config 0x3c: 0x00020000
pcieport 0000:01:00.0: vgaarb: pci_notify
pci 0000:02:01.0: save config 0x00: 0xb40412d8
pci 0000:02:01.0: save config 0x04: 0x00100000
pci 0000:02:01.0: save config 0x08: 0x06040001
pci 0000:02:01.0: save config 0x0c: 0x00010000
pci 0000:02:01.0: save config 0x10: 0x00000000
pci 0000:02:01.0: save config 0x14: 0x00000000
pci 0000:02:01.0: save config 0x18: 0x00030302
pci 0000:02:01.0: save config 0x1c: 0x000001f1
pci 0000:02:01.0: save config 0x20: 0x18101810
pci 0000:02:01.0: save config 0x24: 0x0001fff1
pci 0000:02:01.0: save config 0x28: 0x00000000
pci 0000:02:01.0: save config 0x2c: 0x00000000
pci 0000:02:01.0: save config 0x30: 0x00000000
pci 0000:02:01.0: save config 0x34: 0x00000040
pci 0000:02:01.0: save config 0x38: 0x00000000
pci 0000:02:01.0: save config 0x3c: 0x00020000
pcieport 0000:02:01.0: vgaarb: pci_notify
pcieport 0000:02:01.0: assign IRQ: got 0
pcieport 0000:01:00.0: enabling bus mastering
pcieport 0000:02:01.0: enabling device (0000 -> 0002)
pcieport 0000:02:01.0: save config 0x00: 0xb40412d8
pcieport 0000:02:01.0: save config 0x04: 0x00100002
pcieport 0000:02:01.0: save config 0x08: 0x06040001
pcieport 0000:02:01.0: save config 0x0c: 0x00010000
pcieport 0000:02:01.0: save config 0x10: 0x00000000
pcieport 0000:02:01.0: save config 0x14: 0x00000000
pcieport 0000:02:01.0: save config 0x18: 0x00030302
pcieport 0000:02:01.0: save config 0x1c: 0x000001f1
pcieport 0000:02:01.0: save config 0x20: 0x18101810
pcieport 0000:02:01.0: save config 0x24: 0x0001fff1
pcieport 0000:02:01.0: save config 0x28: 0x00000000
pcieport 0000:02:01.0: save config 0x2c: 0x00000000
pcieport 0000:02:01.0: save config 0x30: 0x00000000
pcieport 0000:02:01.0: save config 0x34: 0x00000040
pcieport 0000:02:01.0: save config 0x38: 0x00000000
pcieport 0000:02:01.0: save config 0x3c: 0x00020000
pcieport 0000:02:01.0: vgaarb: pci_notify
pci 0000:02:02.0: save config 0x00: 0xb40412d8
pci 0000:02:02.0: save config 0x04: 0x00100000
pci 0000:02:02.0: save config 0x08: 0x06040001
pci 0000:02:02.0: save config 0x0c: 0x00010000
pci 0000:02:02.0: save config 0x10: 0x00000000
pci 0000:02:02.0: save config 0x14: 0x00000000
pci 0000:02:02.0: save config 0x18: 0x00040402
pci 0000:02:02.0: save config 0x1c: 0x000001f1
pci 0000:02:02.0: save config 0x20: 0x0000fff0
pci 0000:02:02.0: save config 0x24: 0x0001fff1
pci 0000:02:02.0: save config 0x28: 0x00000000
pci 0000:02:02.0: save config 0x2c: 0x00000000
pci 0000:02:02.0: save config 0x30: 0x00000000
pci 0000:02:02.0: save config 0x34: 0x00000040
pci 0000:02:02.0: save config 0x38: 0x00000000
pci 0000:02:02.0: save config 0x3c: 0x00020000
pcieport 0000:02:02.0: vgaarb: pci_notify
pcieport 0000:02:02.0: assign IRQ: got 0
pcieport 0000:02:02.0: enabling bus mastering
imx6q-pcie 33800000.pcie: msi#4 address_hi 0x0 address_lo 0x4007e000
imx6q-pcie 33800000.pcie: msi#5 address_hi 0x0 address_lo 0x4007e000
imx6q-pcie 33800000.pcie: msi#6 address_hi 0x0 address_lo 0x4007e000
imx6q-pcie 33800000.pcie: msi#7 address_hi 0x0 address_lo 0x4007e000
imx6q-pcie 33800000.pcie: msi#1 address_hi 0x0 address_lo 0x4007e000
pcieport 0000:02:02.0: bwctrl: enabled with IRQ 203
pcieport 0000:02:02.0: save config 0x00: 0xb40412d8
pcieport 0000:02:02.0: save config 0x04: 0x00100404
pcieport 0000:02:02.0: save config 0x08: 0x06040001
pcieport 0000:02:02.0: save config 0x0c: 0x00010000
pcieport 0000:02:02.0: save config 0x10: 0x00000000
pcieport 0000:02:02.0: save config 0x14: 0x00000000
pcieport 0000:02:02.0: save config 0x18: 0x00040402
pcieport 0000:02:02.0: save config 0x1c: 0x000001f1
pcieport 0000:02:02.0: save config 0x20: 0x0000fff0
pcieport 0000:02:02.0: save config 0x24: 0x0001fff1
pcieport 0000:02:02.0: save config 0x28: 0x00000000
pcieport 0000:02:02.0: save config 0x2c: 0x00000000
pcieport 0000:02:02.0: save config 0x30: 0x00000000
pcieport 0000:02:02.0: save config 0x34: 0x00000040
pcieport 0000:02:02.0: save config 0x38: 0x00000000
pcieport 0000:02:02.0: save config 0x3c: 0x00020000
pcieport 0000:02:02.0: vgaarb: pci_notify
pci 0000:02:03.0: save config 0x00: 0xb40412d8
pci 0000:02:03.0: save config 0x04: 0x00100000
pci 0000:02:03.0: save config 0x08: 0x06040001
pci 0000:02:03.0: save config 0x0c: 0x00010000
pci 0000:02:03.0: save config 0x10: 0x00000000
pci 0000:02:03.0: save config 0x14: 0x00000000
pci 0000:02:03.0: save config 0x18: 0x00050502
pci 0000:02:03.0: save config 0x1c: 0x000001f1
pci 0000:02:03.0: save config 0x20: 0x18201820
pci 0000:02:03.0: save config 0x24: 0x0001fff1
pci 0000:02:03.0: save config 0x28: 0x00000000
pci 0000:02:03.0: save config 0x2c: 0x00000000
pci 0000:02:03.0: save config 0x30: 0x00000000
pci 0000:02:03.0: save config 0x34: 0x00000040
pci 0000:02:03.0: save config 0x38: 0x00000000
pci 0000:02:03.0: save config 0x3c: 0x00020000
pcieport 0000:02:03.0: vgaarb: pci_notify
pcieport 0000:02:03.0: assign IRQ: got 0
pcieport 0000:02:03.0: enabling device (0000 -> 0002)
pcieport 0000:02:03.0: save config 0x00: 0xb40412d8
pcieport 0000:02:03.0: save config 0x04: 0x00100002
pcieport 0000:02:03.0: save config 0x08: 0x06040001
pcieport 0000:02:03.0: save config 0x0c: 0x00010000
pcieport 0000:02:03.0: save config 0x10: 0x00000000
pcieport 0000:02:03.0: save config 0x14: 0x00000000
pcieport 0000:02:03.0: save config 0x18: 0x00050502
pcieport 0000:02:03.0: save config 0x1c: 0x000001f1
pcieport 0000:02:03.0: save config 0x20: 0x18201820
pcieport 0000:02:03.0: save config 0x24: 0x0001fff1
pcieport 0000:02:03.0: save config 0x28: 0x00000000
pcieport 0000:02:03.0: save config 0x2c: 0x00000000
pcieport 0000:02:03.0: save config 0x30: 0x00000000
pcieport 0000:02:03.0: save config 0x34: 0x00000040
pcieport 0000:02:03.0: save config 0x38: 0x00000000
pcieport 0000:02:03.0: save config 0x3c: 0x00020000
pcieport 0000:02:03.0: vgaarb: pci_notify
pci 0000:03:00.0: save config 0x00: 0x0030168c
pci 0000:03:00.0: save config 0x04: 0x00100000
pci 0000:03:00.0: save config 0x08: 0x02800001
pci 0000:03:00.0: save config 0x0c: 0x00000000
pci 0000:03:00.0: save config 0x10: 0x18100004
pci 0000:03:00.0: save config 0x14: 0x00000000
pci 0000:03:00.0: save config 0x18: 0x00000000
pci 0000:03:00.0: save config 0x1c: 0x00000000
pci 0000:03:00.0: save config 0x20: 0x00000000
pci 0000:03:00.0: save config 0x24: 0x00000000
pci 0000:03:00.0: save config 0x28: 0x00000000
pci 0000:03:00.0: save config 0x2c: 0x3116168c
pci 0000:03:00.0: save config 0x30: 0x00000000
pci 0000:03:00.0: save config 0x34: 0x00000040
pci 0000:03:00.0: save config 0x38: 0x00000000
pci 0000:03:00.0: save config 0x3c: 0x000001ff
pci 0000:05:00.0: save config 0x00: 0x74301055
pci 0000:05:00.0: save config 0x04: 0x00100000
pci 0000:05:00.0: save config 0x08: 0x02000011
pci 0000:05:00.0: save config 0x0c: 0x00000000
pci 0000:05:00.0: save config 0x10: 0x18200004
pci 0000:05:00.0: save config 0x14: 0x00000000
pci 0000:05:00.0: save config 0x18: 0x18202004
pci 0000:05:00.0: save config 0x1c: 0x00000000
pci 0000:05:00.0: save config 0x20: 0x18202104
pci 0000:05:00.0: save config 0x24: 0x00000000
pci 0000:05:00.0: save config 0x28: 0x00000000
pci 0000:05:00.0: save config 0x2c: 0x74301055
pci 0000:05:00.0: save config 0x30: 0x00000000
pci 0000:05:00.0: save config 0x34: 0x00000040
pci 0000:05:00.0: save config 0x38: 0x00000000
pci 0000:05:00.0: save config 0x3c: 0x000001ff
VFS: Mounted root (squashfs filesystem) readonly on device 179:6.
devtmpfs: mounted
Freeing unused kernel memory: 896K
Run /sbin/wrap-init as init process
   with arguments:
     /sbin/wrap-init
   with environment:
     HOME=/
     TERM=linux
     rootrw=/dev/mmcblk2p8
     rootrwfstype=ext4
     persistmnt=/dev/mmcblk2p7
     persistmntfstype=ext4
pcieport 0000:02:02.0: save config 0x00: 0xb40412d8
pcieport 0000:02:02.0: save config 0x04: 0x00100404
pcieport 0000:02:02.0: save config 0x08: 0x06040001
pcieport 0000:02:02.0: save config 0x0c: 0x00010000
pcieport 0000:02:02.0: save config 0x10: 0x00000000
pcieport 0000:02:02.0: save config 0x14: 0x00000000
pcieport 0000:02:02.0: save config 0x18: 0x00040402
pcieport 0000:02:02.0: save config 0x1c: 0x000001f1
pcieport 0000:02:02.0: save config 0x20: 0x0000fff0
pcieport 0000:02:02.0: save config 0x24: 0x0001fff1
pcieport 0000:02:02.0: save config 0x28: 0x00000000
pcieport 0000:02:02.0: save config 0x2c: 0x00000000
pcieport 0000:02:02.0: save config 0x30: 0x00000000
pcieport 0000:02:02.0: save config 0x34: 0x00000040
pcieport 0000:02:02.0: save config 0x38: 0x00000000
pcieport 0000:02:02.0: save config 0x3c: 0x00020000
pcieport 0000:02:02.0: PME# enabled
imx-sdma 302c0000.dma-controller: loaded firmware 4.6
imx-sdma 302b0000.dma-controller: loaded firmware 4.6
imx-sdma 30bd0000.dma-controller: loaded firmware 4.6
usb_phy_generic usbphynop1: dummy supplies not allowed for exclusive requests 
(id=vbus)
usb_phy_generic usbphynop2: dummy supplies not allowed for exclusive requests 
(id=vbus)
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
cfg80211: Loading compiled-in X.509 certificates for regulatory database
Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
Loaded X.509 cert 'wens: 61c038651aabdcf94bd0ac7ff06c7248db18c600'
ci_hdrc ci_hdrc.1: EHCI Host Controller
ci_hdrc ci_hdrc.1: new USB bus registered, assigned bus number 1
ci_hdrc ci_hdrc.1: USB 2.0 started, EHCI 1.00
usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.19
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: EHCI Host Controller
usb usb1: Manufacturer: Linux 6.19.0-rc1 ehci_hcd
usb usb1: SerialNumber: ci_hdrc.1
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
lan743x 0000:05:00.0: vgaarb: pci_notify
lan743x 0000:05:00.0: assign IRQ: got 201
pcieport 0000:02:03.0: enabling bus mastering
lan743x 0000:05:00.0: enabling device (0000 -> 0002)
lan743x 0000:05:00.0 (unnamed net_device) (uninitialized): PCI: Vendor ID = 
0x1055, Device ID = 0x7430
lan743x 0000:05:00.0: enabling bus mastering
lan743x 0000:05:00.0 (unnamed net_device) (uninitialized): ID_REV = 0x74300011, 
FPGA_REV = 0.0
usb 1-1: new high-speed USB device number 2 using ci_hdrc
lan743x 0000:05:00.0 (unnamed net_device) (uninitialized): MAC address set to 
00:d0:12:23:fa:8b
lan743x 0000:05:00.0: vgaarb: pci_notify
usb 1-1: New USB device found, idVendor=0424, idProduct=2744, bcdDevice= 2.21
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-1: Product: USB2744
usb 1-1: Manufacturer: Microchip Tech
hub 1-1:1.0: USB hub found
hub 1-1:1.0: 5 ports detected
usb 1-1.5: new high-speed USB device number 3 using ci_hdrc
usb 1-1.5: New USB device found, idVendor=0424, idProduct=2740, bcdDevice= 2.00
usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-1.5: Product: Hub Controller
usb 1-1.5: Manufacturer: Microchip Tech
Generic PHY 30be0000.ethernet-1:00: attached PHY driver 
(mii_bus:phy_addr=30be0000.ethernet-1:00, irq=POLL)
fec 30be0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
Bluetooth: Core ver 2.22
NET: Registered PF_BLUETOOTH protocol family
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Bluetooth: BNEP filters: protocol multicast
Bluetooth: BNEP socket layer initialized
imx6q-pcie 33800000.pcie: msi#2 address_hi 0x0 address_lo 0x4007e000
imx6q-pcie 33800000.pcie: msi#3 address_hi 0x0 address_lo 0x4007e000
imx6q-pcie 33800000.pcie: msi#4 address_hi 0x0 address_lo 0x4007e000
imx6q-pcie 33800000.pcie: msi#5 address_hi 0x0 address_lo 0x4007e000
imx6q-pcie 33800000.pcie: msi#6 address_hi 0x0 address_lo 0x4007e000
imx6q-pcie 33800000.pcie: msi#7 address_hi 0x0 address_lo 0x4007e000
lan743x 0000:05:00.0 eth1: using MSIX interrupts, number of vectors = 6
lan743x 0000:05:00.0 eth1: PHY [pci-0000:05:00.0:01] driver [Generic PHY] (irq=POLL)
lan743x 0000:05:00.0 eth1: configuring for phy/gmii link mode
lan743x 0000:05:00.0 eth1: Link is Up - 1Gbps/Full - flow control rx/tx
imx8m-blk-ctrl 38330000.blk-ctrl: sync_state() pending due to 38310000.video-codec
imx8m-blk-ctrl 38330000.blk-ctrl: sync_state() pending due to 38300000.video-codec
imx-pgc imx-pgc-domain.5: sync_state() pending due to 38008000.gpu
imx-pgc imx-pgc-domain.5: sync_state() pending due to 38000000.gpu
ath9k 0000:03:00.0: vgaarb: pci_notify
ath9k 0000:03:00.0: assign IRQ: got 201
pcieport 0000:02:01.0: enabling bus mastering
ath9k 0000:03:00.0: enabling device (0000 -> 0002)
ath9k 0000:03:00.0: enabling bus mastering
ath: EEPROM regdomain: 0x37
ath: EEPROM indicates we should expect a direct regpair map
ath: Country alpha2 being used: AL
ath: Regpair used: 0x37
ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy0: Atheros AR9300 Rev:3 mem=0x00000000ce8f30fa, irq=201
ath9k 0000:03:00.0: vgaarb: pci_notify


^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: imx8 PCI regression since "iommu: Get DT/ACPI parsing into the proper probe path"
  2026-01-09 16:22 imx8 PCI regression since "iommu: Get DT/ACPI parsing into the proper probe path" Nicolas Cavallari
@ 2026-01-13  9:17 ` Nicolas Cavallari
  2026-01-16 16:52   ` [REGRESSION] " Nicolas Cavallari
  0 siblings, 1 reply; 8+ messages in thread
From: Nicolas Cavallari @ 2026-01-13  9:17 UTC (permalink / raw)
  To: iommu, linux-pci, linux-arm-kernel, linux-kernel
  Cc: Bjorn Helgaas, Rob Herring (Arm), Robin Murphy, Lorenzo Pieralisi,
	Jason Gunthorpe, Joerg Roedel

+cc patch author & reviewers

On 1/9/26 17:22, Nicolas Cavallari wrote:
> When upgrading from 6.12 to a 6.18 kernel, I noticed that a PCI
> Ethernet adapter (Microchip LAN7430) would hang under load and not
> recover.  When that happens, some of its registers indicate it is
> failing to do DMA reads, so cannot reclaim entries on its ring buffer.
> 
> I bisected the problem into this commit:
> 
> commit bcb81ac6ae3c2ef95b44e7b54c3c9522364a245c
> Author: Robin Murphy <robin.murphy@arm.com>
> Date:   Fri Feb 28 15:46:33 2025 +0000
> 
>      iommu: Get DT/ACPI parsing into the proper probe path
> 
> The problem still exists on 6.19-rc1, on pci/next (29a77b4897f1) and on
> iommu/master (360e85353769) trees.  Reverting the commit fixes the issue.
> 
> The system is a Gateworks GW7200, which is a i.MX 8 Mini connected to a 
> Pericom
> PI7C9X2G404 4-port switch connected to the LAN7430 chip.
> 
> -[0000:00]---00.0-[01-ff]----00.0-[02-05]--+-01.0-[03]----00.0
>                                             +-02.0-[04]--
>                                             \-03.0-[05]----00.0
> 
> The problem only occurs when there is at least another PCI device in use 
> on the
> switch.  It does not happen if the LAN7430 is the only PCI device, or if 
> the
> other devices are not actively used.  For example i can reproduce it 
> with an
> ath9k wireless network adapter when it is up and running, but not when 
> it is
> down or its driver is not loaded.
> 
> I suspect that other PCI devices have similar issues, but the LAN7430 is 
> the
> easiest one to diagnose, as it hangs within seconds with an iperf3 -- 
> bidir -u
> -b 200M and its register map are public.
> 
> I couldn't find an way to dump the PCI address translation mapping from
> userspace.
> I would be happy to provide more information or test patches.
> 
> ---- lspci -v
> 
> 00:00.0 PCI bridge: Synopsys, Inc. DWC_usb3 / PCIe bridge (rev 01) 
> (prog-if 00 [Normal decode])
>          Device tree node: /sys/firmware/devicetree/base/soc@0/ 
> pcie@33800000/pcie@0,0
>          Flags: bus master, fast devsel, latency 0, IRQ 202
>          Memory at 18000000 (32-bit, non-prefetchable) [size=1M]
>          Bus: primary=00, secondary=01, subordinate=ff, sec-latency=0
>          I/O behind bridge: [disabled] [16-bit]
>          Memory behind bridge: 18100000-182fffff [size=2M] [32-bit]
>          Prefetchable memory behind bridge: [disabled] [32-bit]
>          Expansion ROM at 18300000 [virtual] [disabled] [size=64K]
>          Capabilities: [40] Power Management version 3
>          Capabilities: [50] MSI: Enable+ Count=1/1 Maskable+ 64bit+
>          Capabilities: [70] Express Root Port (Slot-), IntMsgNum 0
>          Capabilities: [100] Advanced Error Reporting
>          Capabilities: [148] L1 PM Substates
>          Kernel driver in use: pcieport
> 
> 01:00.0 PCI bridge: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4- 
> Port/4-Lane Packet Switch (rev 01) (prog-if 00 [Normal decode])
>          Device tree node: /sys/firmware/devicetree/base/soc@0/ 
> pcie@33800000/pcie@0,0/pcie@0,0
>          Flags: bus master, fast devsel, latency 0
>          Bus: primary=01, secondary=02, subordinate=05, sec-latency=0
>          I/O behind bridge: [disabled] [32-bit]
>          Memory behind bridge: 18100000-182fffff [size=2M] [32-bit]
>          Prefetchable memory behind bridge: [disabled] [64-bit]
>          Capabilities: [40] Power Management version 3
>          Capabilities: [4c] MSI: Enable- Count=1/4 Maskable+ 64bit+
>          Capabilities: [64] Vendor Specific Information: Len=34 <?>
>          Capabilities: [b0] Subsystem: Device 0000:0000
>          Capabilities: [c0] Express Upstream Port, IntMsgNum 0
>          Capabilities: [100] Advanced Error Reporting
>          Capabilities: [140] Virtual Channel
>          Capabilities: [20c] Power Budgeting <?>
>          Capabilities: [230] Latency Tolerance Reporting
>          Capabilities: [240] L1 PM Substates
>          Capabilities: [260] Precision Time Measurement
>          Kernel driver in use: pcieport
> 
> 02:01.0 PCI bridge: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4- 
> Port/4-Lane Packet Switch (rev 01) (prog-if 00 [Normal decode])
>          Flags: bus master, fast devsel, latency 0
>          Bus: primary=02, secondary=03, subordinate=03, sec-latency=0
>          I/O behind bridge: [disabled] [32-bit]
>          Memory behind bridge: 18100000-181fffff [size=1M] [32-bit]
>          Prefetchable memory behind bridge: [disabled] [64-bit]
>          Capabilities: [40] Power Management version 3
>          Capabilities: [4c] MSI: Enable- Count=1/4 Maskable+ 64bit+
>          Capabilities: [64] Vendor Specific Information: Len=34 <?>
>          Capabilities: [b0] Subsystem: Device 0000:0000
>          Capabilities: [c0] Express Downstream Port (Slot+), IntMsgNum 0
>          Capabilities: [100] Advanced Error Reporting
>          Capabilities: [140] Virtual Channel
>          Capabilities: [20c] Power Budgeting <?>
>          Capabilities: [220] Access Control Services
>          Capabilities: [240] L1 PM Substates
>          Capabilities: [250] Downstream Port Containment
>          Kernel driver in use: pcieport
> 
> 02:02.0 PCI bridge: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4- 
> Port/4-Lane Packet Switch (rev 01) (prog-if 00 [Normal decode])
>          Flags: bus master, fast devsel, latency 0, IRQ 203
>          Bus: primary=02, secondary=04, subordinate=04, sec-latency=0
>          I/O behind bridge: [disabled] [32-bit]
>          Memory behind bridge: [disabled] [32-bit]
>          Prefetchable memory behind bridge: [disabled] [64-bit]
>          Capabilities: [40] Power Management version 3
>          Capabilities: [4c] MSI: Enable+ Count=1/4 Maskable+ 64bit+
>          Capabilities: [64] Vendor Specific Information: Len=34 <?>
>          Capabilities: [b0] Subsystem: Device 0000:0000
>          Capabilities: [c0] Express Downstream Port (Slot+), IntMsgNum 0
>          Capabilities: [100] Advanced Error Reporting
>          Capabilities: [140] Virtual Channel
>          Capabilities: [20c] Power Budgeting <?>
>          Capabilities: [220] Access Control Services
>          Capabilities: [240] L1 PM Substates
>          Capabilities: [250] Downstream Port Containment
>          Kernel driver in use: pcieport
> 
> 02:03.0 PCI bridge: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4- 
> Port/4-Lane Packet Switch (rev 01) (prog-if 00 [Normal decode])
>          Device tree node: /sys/firmware/devicetree/base/soc@0/ 
> pcie@33800000/pcie@0,0/pcie@0,0/pcie@3,0
>          Flags: bus master, fast devsel, latency 0
>          Bus: primary=02, secondary=05, subordinate=05, sec-latency=0
>          I/O behind bridge: [disabled] [32-bit]
>          Memory behind bridge: 18200000-182fffff [size=1M] [32-bit]
>          Prefetchable memory behind bridge: [disabled] [64-bit]
>          Capabilities: [40] Power Management version 3
>          Capabilities: [4c] MSI: Enable- Count=1/4 Maskable+ 64bit+
>          Capabilities: [64] Vendor Specific Information: Len=34 <?>
>          Capabilities: [b0] Subsystem: Device 0000:0000
>          Capabilities: [c0] Express Downstream Port (Slot+), IntMsgNum 0
>          Capabilities: [100] Advanced Error Reporting
>          Capabilities: [140] Virtual Channel
>          Capabilities: [20c] Power Budgeting <?>
>          Capabilities: [220] Access Control Services
>          Capabilities: [240] L1 PM Substates
>          Capabilities: [250] Downstream Port Containment
>          Kernel driver in use: pcieport
> 
> 03:00.0 Network controller: Qualcomm Atheros AR93xx Wireless Network 
> Adapter (rev 01)
>          Subsystem: Qualcomm Atheros Device 3116
>          Flags: bus master, fast devsel, latency 0, IRQ 201
>          Memory at 18100000 (64-bit, non-prefetchable) [size=128K]
>          Expansion ROM at 18120000 [virtual] [disabled] [size=64K]
>          Capabilities: [40] Power Management version 3
>          Capabilities: [50] MSI: Enable- Count=1/4 Maskable+ 64bit+
>          Capabilities: [70] Express Endpoint, IntMsgNum 0
>          Capabilities: [100] Advanced Error Reporting
>          Capabilities: [140] Virtual Channel
>          Capabilities: [300] Device Serial Number 00-00-00-00-00-00-00-00
>          Kernel driver in use: ath9k
>          Kernel modules: ath9k
> 
> 05:00.0 Ethernet controller: Microchip Technology / SMSC LAN7430 (rev 11)
>          Subsystem: Microchip Technology / SMSC LAN7430
>          Device tree node: /sys/firmware/devicetree/base/soc@0/ 
> pcie@33800000/pcie@0,0/pcie@0,0/pcie@3,0/ethernet@0,0
>          Flags: bus master, fast devsel, latency 0, IRQ 201
>          Memory at 18200000 (64-bit, non-prefetchable) [size=8K]
>          Memory at 18202000 (64-bit, non-prefetchable) [size=256]
>          Memory at 18202100 (64-bit, non-prefetchable) [size=256]
>          Capabilities: [40] Power Management version 3
>          Capabilities: [50] MSI: Enable- Count=1/8 Maskable+ 64bit+
>          Capabilities: [70] Express Endpoint, IntMsgNum 0
>          Capabilities: [b0] MSI-X: Enable+ Count=8 Masked-
>          Capabilities: [100] Advanced Error Reporting
>          Capabilities: [148] Device Serial Number (the EUI64 of the card)
>          Capabilities: [158] Latency Tolerance Reporting
>          Capabilities: [160] L1 PM Substates
>          Capabilities: [170] Vendor Specific Information: ID=0002 Rev=4 
> Len=100 <?>
>          Kernel driver in use: lan743x
>          Kernel modules: lan743x
> 
> ---- dmesg:
> 
> Booting Linux on physical CPU 0x0000000000 [0x410fd034]
> Linux version 6.19.0-rc1 (buildroot@buildroot) (aarch64-buildroot-linux- 
> musl-gcc.br_real (Buildroot 2025.11-rc2-7266-g8a41889b4d) 14.3.0, GNU ld 
> (GNU Binutils) 2.43.1) #1 SMP PREEMPT Thu Dec 11 22:43:20 UTC 2025
> KASLR disabled due to lack of seed
> Machine model: Gateworks Venice GW72xx-0x i.MX8MM Development Kit
> OF: reserved mem: Reserved memory: No reserved-memory node in the DT
> Zone ranges:
>    DMA      [mem 0x0000000040000000-0x00000000ffffffff]
>    DMA32    empty
>    Normal   [mem 0x0000000100000000-0x000000013fffffff]
> Movable zone start for each node
> Early memory node ranges
>    node   0: [mem 0x0000000040000000-0x000000013fffffff]
> Initmem setup node 0 [mem 0x0000000040000000-0x000000013fffffff]
> cma: Reserved 32 MiB at 0x00000000fe000000
> psci: probing for conduit method from DT.
> psci: PSCIv1.1 detected in firmware.
> psci: Using standard PSCI v0.2 function IDs
> psci: MIGRATE_INFO_TYPE not supported.
> psci: SMC Calling Convention v1.5
> percpu: Embedded 22 pages/cpu s49304 r8192 d32616 u90112
> pcpu-alloc: s49304 r8192 d32616 u90112 alloc=22*4096
> pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
> Detected VIPT I-cache on CPU0
> CPU features: detected: GICv3 CPU interface
> CPU features: detected: ARM erratum 845719
> alternatives: applying boot alternatives
> Kernel command line: root=/dev/mmcblk2p6 rootrw=/dev/mmcblk2p8 
> rootrwfstype=ext4 persistmnt=/dev/mmcblk2p7 persistmntfstype=ext4 init=/ 
> sbin/wrap-init
> Unknown kernel command line parameters "rootrw=/dev/mmcblk2p8 
> rootrwfstype=ext4 persistmnt=/dev/mmcblk2p7 persistmntfstype=ext4", will 
> be passed to user space.
> printk: log buffer data + meta data: 131072 + 458752 = 589824 bytes
> Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes, linear)
> Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes, linear)
> software IO TLB: area num 4.
> software IO TLB: mapped [mem 0x00000000fa000000-0x00000000fe000000] (64MB)
> Built 1 zonelists, mobility grouping on.  Total pages: 1048576
> mem auto-init: stack:off, heap alloc:off, heap free:off
> SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
> rcu: Preemptible hierarchical RCU implementation.
> rcu:     RCU event tracing is enabled.
> rcu:     RCU restricting CPUs from NR_CPUS=256 to nr_cpu_ids=4.
>      Trampoline variant of Tasks RCU enabled.
>      Tracing variant of Tasks RCU enabled.
> rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
> rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
> RCU Tasks: Setting shift to 2 and lim to 1 rcu_task_cb_adjust=1 
> rcu_task_cpu_ids=4.
> RCU Tasks Trace: Setting shift to 2 and lim to 1 rcu_task_cb_adjust=1 
> rcu_task_cpu_ids=4.
> NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
> GICv3: GIC: Using split EOI/Deactivate mode
> GICv3: 128 SPIs implemented
> GICv3: 0 Extended SPIs implemented
> Root IRQ handler: gic_handle_irq
> GICv3: GICv3 features: 16 PPIs
> GICv3: GICD_CTLR.DS=0, SCR_EL3.FIQ=1
> GICv3: CPU0: found redistributor 0 region 0:0x0000000038880000
> ITS: No ITS available, not enabling LPIs
> rcu: srcu_init: Setting srcu_struct sizes based on contention.
> arch_timer: cp15 timer running at 8.00MHz (phys).
> clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 
> 0x1d854df40, max_idle_ns: 440795202120 ns
> sched_clock: 56 bits at 8MHz, resolution 125ns, wraps every 2199023255500ns
> Console: colour dummy device 80x25
> printk: legacy console [tty0] enabled
> Calibrating delay loop (skipped), value calculated using timer 
> frequency.. 16.00 BogoMIPS (lpj=32000)
> pid_max: default: 32768 minimum: 301
> Mount-cache hash table entries: 8192 (order: 4, 65536 bytes, linear)
> Mountpoint-cache hash table entries: 8192 (order: 4, 65536 bytes, linear)
> rcu: Hierarchical SRCU implementation.
> rcu:     Max phase no-delay instances is 1000.
> Timer migration: 1 hierarchy levels; 8 children per group; 1 crossnode 
> level
> smp: Bringing up secondary CPUs ...
> Detected VIPT I-cache on CPU1
> GICv3: CPU1: found redistributor 1 region 0:0x00000000388a0000
> CPU1: Booted secondary processor 0x0000000001 [0x410fd034]
> Detected VIPT I-cache on CPU2
> GICv3: CPU2: found redistributor 2 region 0:0x00000000388c0000
> CPU2: Booted secondary processor 0x0000000002 [0x410fd034]
> Detected VIPT I-cache on CPU3
> GICv3: CPU3: found redistributor 3 region 0:0x00000000388e0000
> CPU3: Booted secondary processor 0x0000000003 [0x410fd034]
> smp: Brought up 1 node, 4 CPUs
> SMP: Total of 4 processors activated.
> CPU: All CPU(s) started at EL2
> CPU features: detected: 32-bit EL0 Support
> CPU features: detected: CRC32 instructions
> CPU features: detected: PMUv3
> alternatives: applying system-wide alternatives
> Memory: 3998528K/4194304K available (8384K kernel code, 888K rwdata, 
> 2348K rodata, 896K init, 337K bss, 159960K reserved, 32768K cma-reserved)
> devtmpfs: initialized
> clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, 
> max_idle_ns: 7645041785100000 ns
> posixtimers hash table entries: 2048 (order: 3, 32768 bytes, linear)
> futex hash table entries: 1024 (65536 bytes on 1 NUMA nodes, total 64 
> KiB, linear).
> 29504 pages in range for non-PLT usage
> 521024 pages in range for PLT usage
> NET: Registered PF_NETLINK/PF_ROUTE protocol family
> DMA: preallocated 512 KiB GFP_KERNEL pool for atomic allocations
> DMA: preallocated 512 KiB GFP_KERNEL|GFP_DMA pool for atomic allocations
> DMA: preallocated 512 KiB GFP_KERNEL|GFP_DMA32 pool for atomic allocations
> thermal_sys: Registered thermal governor 'step_wise'
> cpuidle: using governor menu
> hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
> ASID allocator initialised with 65536 entries
> /soc@0: Fixed dependency cycle(s) with /soc@0/bus@30000000/ 
> efuse@30350000/unique-id@4
> /soc@0/interrupt-controller@38800000: Fixed dependency cycle(s) with / 
> soc@0/interrupt-controller@38800000
> /soc@0/bus@30000000/pinctrl@30330000: Fixed dependency cycle(s) with / 
> soc@0/bus@30000000/pinctrl@30330000/hoggrp
> imx8mm-pinctrl 30330000.pinctrl: initialized IMX pinctrl driver
> /soc@0/bus@30000000/efuse@30350000: Fixed dependency cycle(s) with / 
> soc@0/bus@30000000/clock-controller@30380000
> /soc@0/bus@30000000/efuse@30350000: Fixed dependency cycle(s) with / 
> soc@0/bus@30000000/clock-controller@30380000
> /soc@0/bus@30000000/clock-controller@30380000: Fixed dependency cycle(s) 
> with /soc@0/interrupt-controller@38800000
> iommu: Default domain type: Translated
> iommu: DMA domain TLB invalidation policy: strict mode
> pps_core: LinuxPPS API ver. 1 registered
> pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti 
> <giometti@linux.it>
> EDAC MC: Ver: 3.0.0
> vgaarb: loaded
> clocksource: Switched to clocksource arch_sys_counter
> VFS: Disk quotas dquot_6.6.0
> VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
> NET: Registered PF_INET protocol family
> IP idents hash table entries: 65536 (order: 7, 524288 bytes, linear)
> tcp_listen_portaddr_hash hash table entries: 2048 (order: 3, 32768 
> bytes, linear)
> Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear)
> TCP established hash table entries: 32768 (order: 6, 262144 bytes, linear)
> TCP bind hash table entries: 32768 (order: 8, 1048576 bytes, linear)
> TCP: Hash tables configured (established 32768 bind 32768)
> UDP hash table entries: 2048 (order: 5, 131072 bytes, linear)
> UDP-Lite hash table entries: 2048 (order: 5, 131072 bytes, linear)
> NET: Registered PF_UNIX/PF_LOCAL protocol family
> PCI: CLS 0 bytes, default 64
> ARM FF-A: FFA_VERSION returned not supported
> Initialise system trusted keyrings
> workingset: timestamp_bits=62 max_order=20 bucket_order=0
> squashfs: version 4.0 (2009/01/31) Phillip Lougher
> Key type asymmetric registered
> Asymmetric key parser 'x509' registered
> io scheduler mq-deadline registered
> io scheduler kyber registered
> mxs-dma 33000000.dma-controller: initialized
> SoC: i.MX8MM revision 1.0
> 30860000.serial: ttymxc0 at MMIO 0x30860000 (irq = 15, base_baud = 
> 1500000) is a IMX
> 30880000.serial: ttymxc2 at MMIO 0x30880000 (irq = 16, base_baud = 
> 1500000) is a IMX
> 30890000.serial: ttymxc1 at MMIO 0x30890000 (irq = 17, base_baud = 
> 1500000) is a IMX
> imx-uart 30890000.serial: Console IMX rounded baud rate from 114286 to 
> 114300
> printk: console [ttymxc1] enabled
> 30a60000.serial: ttymxc3 at MMIO 0x30a60000 (irq = 18, base_baud = 
> 1500000) is a IMX
> wireguard: WireGuard 1.0.0 loaded. See www.wireguard.com for information.
> wireguard: Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. 
> All Rights Reserved.
> i2c_dev: i2c /dev entries driver
> sdhci: Secure Digital Host Controller Interface driver
> sdhci: Copyright(c) Pierre Ossman
> sdhci-pltfm: SDHCI platform and OF driver helper
> SMCCC: SOC_ID: ARCH_SOC_ID not implemented, skipping ....
> caam 30900000.crypto: Entropy delay = 3200
> caam 30900000.crypto: Entropy delay = 6400
> caam 30900000.crypto: Instantiated RNG4 SH0
> mmc2: SDHCI controller on 30b60000.mmc [30b60000.mmc] using ADMA
> caam 30900000.crypto: Instantiated RNG4 SH1
> caam 30900000.crypto: device ID = 0x0a16040100000000 (Era 9)
> caam 30900000.crypto: job rings = 2, qi = 0
> trusted_key: caam algorithms registered in /proc/crypto
> caam 30900000.crypto: registering rng-caam
> caam 30900000.crypto: rng crypto API alg registered prng-caam
> mmc2: new HS400 Enhanced strobe MMC card at address 0001
> mmcblk2: mmc2:0001 IY2964 58.3 GiB
> hw perfevents: enabled with armv8_cortex_a53 PMU driver, 7 (0,8000003f) 
> counters available
> nvmem imx-ocotp0: cell mac-address raw len 6 unaligned to nvmem word size 4
> /soc@0: Fixed dependency cycle(s) with /soc@0/bus@30000000/efuse@30350000
> NET: Registered PF_INET6 protocol family
>   mmcblk2: p1 p2 < p5 p6 p7 p8 p9 >
> Segment Routing with IPv6
> In-situ OAM (IOAM) with IPv6
> NET: Registered PF_PACKET protocol family
> mmcblk2boot0: mmc2:0001 IY2964 4.00 MiB
> registered taskstats version 1
> Loading compiled-in X.509 certificates
> mmcblk2boot1: mmc2:0001 IY2964 4.00 MiB
> mmcblk2rpmb: mmc2:0001 IY2964 4.00 MiB, chardev (249:0)
> gpio gpiochip0: Static allocation of GPIO base is deprecated, use 
> dynamic allocation.
> gpio gpiochip1: Static allocation of GPIO base is deprecated, use 
> dynamic allocation.
> random: crng init done
> gpio gpiochip2: Static allocation of GPIO base is deprecated, use 
> dynamic allocation.
> gpio gpiochip3: Static allocation of GPIO base is deprecated, use 
> dynamic allocation.
> gpio gpiochip4: Static allocation of GPIO base is deprecated, use 
> dynamic allocation.
> i2c i2c-0: using pinctrl states for GPIO recovery
> i2c i2c-0: using generic GPIOs for recovery
> gateworks-gsc 0-0020: Gateworks System Controller v66: fw 0xa691
> pca953x 0-0023: supply vcc not found, using dummy regulator
> pca953x 0-0023: using no auto increment
> at24 0-0050: supply vcc not found, using dummy regulator
> at24 0-0050: 256 byte 24c02 EEPROM, writable, 16 bytes/write
> at24 0-0051: supply vcc not found, using dummy regulator
> at24 0-0051: 256 byte 24c02 EEPROM, writable, 16 bytes/write
> at24 0-0052: supply vcc not found, using dummy regulator
> at24 0-0052: 256 byte 24c02 EEPROM, writable, 16 bytes/write
> at24 0-0053: supply vcc not found, using dummy regulator
> at24 0-0053: 256 byte 24c02 EEPROM, writable, 16 bytes/write
> rtc-ds1672 0-0068: registered as rtc0
> rtc-ds1672 0-0068: setting system clock to 2026-01-09T14:32:53 UTC 
> (1767969173)
> i2c i2c-0: IMX I2C adapter registered
> i2c i2c-1: using generic GPIOs for recovery
> at24 1-0052: supply vcc not found, using dummy regulator
> at24 1-0052: 4096 byte 24c32 EEPROM, writable, 32 bytes/write
> i2c i2c-1: IMX I2C adapter registered
> i2c i2c-2: IMX I2C adapter registered
> imx6q-pcie 33800000.pcie: host bridge /soc@0/pcie@33800000 ranges:
> imx6q-pcie 33800000.pcie: Parsing ranges property...
> imx6q-pcie 33800000.pcie:       IO 0x001ff80000..0x001ff8ffff -> 
> 0x0000000000
> imx6q-pcie 33800000.pcie:      MEM 0x0018000000..0x001fefffff -> 
> 0x0018000000
> imx6q-pcie 33800000.pcie: config reg[1] 0x1ff00000 == cpu 0x1ff00000
> ; no fixup was ever needed for this devicetree
> imx-cpufreq-dt imx-cpufreq-dt: cpu speed grade 2 mkt segment 2 
> supported-hw 0x4 0x4
> clk: Disabling unused clocks
> PM: genpd: Disabling unused power domains
> sdhci-esdhc-imx 30b50000.mmc: Got CD GPIO
> check access for rdinit=/init failed: -2, ignoring
> mmc1: SDHCI controller on 30b50000.mmc [30b50000.mmc] using ADMA
> imx6q-pcie 33800000.pcie: Using 32 MSI vectors
> imx6q-pcie 33800000.pcie: iATU: unroll T, 4 ob, 4 ib, align 64K, limit 4G
> imx6q-pcie 33800000.pcie: PCIe Gen.2 x1 link up
> imx6q-pcie 33800000.pcie: PCI host bridge to bus 0000:00
> pci_bus 0000:00: root bus resource [bus 00-ff]
> pci_bus 0000:00: root bus resource [io  0x0000-0xffff]
> pci_bus 0000:00: root bus resource [mem 0x18000000-0x1fefffff]
> pci_bus 0000:00: scanning bus
> pci 0000:00:00.0: [16c3:abcd] type 01 class 0x060400 PCIe Root Port
> pci 0000:00:00.0: BAR 0 [mem 0x00000000-0x000fffff]
> pci 0000:00:00.0: ROM [mem 0x00000000-0x0000ffff pref]
> pci 0000:00:00.0: PCI bridge to [bus 01-ff]
> pci 0000:00:00.0:   bridge window [io  0x0000-0x0fff]
> pci 0000:00:00.0:   bridge window [mem 0x00000000-0x000fffff]
> pci 0000:00:00.0:   bridge window [mem 0x00000000-0x000fffff pref]
> pci 0000:00:00.0: supports D1
> pci 0000:00:00.0: PME# supported from D0 D1 D3hot D3cold
> pci 0000:00:00.0: PME# disabled
> pci 0000:00:00.0: vgaarb: pci_notify
> pci_bus 0000:00: fixups for bus
> pci 0000:00:00.0: scanning [bus 01-ff] behind bridge, pass 0
> pci_bus 0000:01: scanning bus
> pci 0000:01:00.0: [12d8:b404] type 01 class 0x060400 PCIe Switch 
> Upstream Port
> pci 0000:01:00.0: PCI bridge to [bus 00]
> pci 0000:01:00.0:   bridge window [io  0x0000-0x0fff]
> pci 0000:01:00.0:   bridge window [mem 0x00000000-0x000fffff]
> pci 0000:01:00.0:   bridge window [mem 0x00000000-0x000fffff 64bit pref]
> pci 0000:01:00.0: supports D1 D2
> pci 0000:01:00.0: PME# supported from D0 D1 D2 D3hot D3cold
> pci 0000:01:00.0: PME# disabled
> pci 0000:01:00.0: PTM enabled (root), unknown granularity
> pci 0000:01:00.0: vgaarb: pci_notify
> pci 0000:01:00.0: ASPM: default states L0s L1
> pci_bus 0000:01: fixups for bus
> pci 0000:01:00.0: scanning [bus 00-00] behind bridge, pass 0
> pci 0000:01:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
> pci 0000:01:00.0: scanning [bus 00-00] behind bridge, pass 1
> pci_bus 0000:02: scanning bus
> pci 0000:02:01.0: [12d8:b404] type 01 class 0x060400 PCIe Switch 
> Downstream Port
> pci 0000:02:01.0: PCI bridge to [bus 00]
> pci 0000:02:01.0:   bridge window [io  0x0000-0x0fff]
> pci 0000:02:01.0:   bridge window [mem 0x00000000-0x000fffff]
> pci 0000:02:01.0:   bridge window [mem 0x00000000-0x000fffff 64bit pref]
> pci 0000:02:01.0: supports D1 D2
> pci 0000:02:01.0: PME# supported from D0 D1 D2 D3hot D3cold
> pci 0000:02:01.0: PME# disabled
> pci 0000:02:01.0: vgaarb: pci_notify
> pci 0000:02:02.0: [12d8:b404] type 01 class 0x060400 PCIe Switch 
> Downstream Port
> pci 0000:02:02.0: PCI bridge to [bus 00]
> pci 0000:02:02.0:   bridge window [io  0x0000-0x0fff]
> pci 0000:02:02.0:   bridge window [mem 0x00000000-0x000fffff]
> pci 0000:02:02.0:   bridge window [mem 0x00000000-0x000fffff 64bit pref]
> pci 0000:02:02.0: supports D1 D2
> pci 0000:02:02.0: PME# supported from D0 D1 D2 D3hot D3cold
> pci 0000:02:02.0: PME# disabled
> pci 0000:02:02.0: vgaarb: pci_notify
> pci 0000:02:03.0: [12d8:b404] type 01 class 0x060400 PCIe Switch 
> Downstream Port
> pci 0000:02:03.0: PCI bridge to [bus 00]
> pci 0000:02:03.0:   bridge window [io  0x0000-0x0fff]
> pci 0000:02:03.0:   bridge window [mem 0x00000000-0x000fffff]
> pci 0000:02:03.0:   bridge window [mem 0x00000000-0x000fffff 64bit pref]
> pci 0000:02:03.0: supports D1 D2
> pci 0000:02:03.0: PME# supported from D0 D1 D2 D3hot D3cold
> pci 0000:02:03.0: PME# disabled
> pci 0000:02:03.0: vgaarb: pci_notify
> pci_bus 0000:02: fixups for bus
> pci 0000:02:01.0: scanning [bus 00-00] behind bridge, pass 0
> pci 0000:02:01.0: bridge configuration invalid ([bus 00-00]), reconfiguring
> pci 0000:02:02.0: scanning [bus 00-00] behind bridge, pass 0
> pci 0000:02:02.0: bridge configuration invalid ([bus 00-00]), reconfiguring
> pci 0000:02:03.0: scanning [bus 00-00] behind bridge, pass 0
> pci 0000:02:03.0: bridge configuration invalid ([bus 00-00]), reconfiguring
> pci 0000:02:01.0: scanning [bus 00-00] behind bridge, pass 1
> pci_bus 0000:03: scanning bus
> pci 0000:03:00.0: [168c:0030] type 00 class 0x028000 PCIe Endpoint
> pci 0000:03:00.0: BAR 0 [mem 0x00000000-0x0001ffff 64bit]
> pci 0000:03:00.0: ROM [mem 0x00000000-0x0000ffff pref]
> pci 0000:03:00.0: supports D1
> pci 0000:03:00.0: PME# supported from D0 D1 D3hot
> pci 0000:03:00.0: PME# disabled
> pci 0000:03:00.0: vgaarb: pci_notify
> pci 0000:03:00.0: ASPM: default states L0s L1
> pci_bus 0000:03: fixups for bus
> pci_bus 0000:03: bus scan returning with max=03
> pci_bus 0000:03: busn_res: [bus 03-ff] end is updated to 03
> pci 0000:02:02.0: scanning [bus 00-00] behind bridge, pass 1
> pci_bus 0000:04: scanning bus
> pci_bus 0000:04: fixups for bus
> pci_bus 0000:04: bus scan returning with max=04
> pci_bus 0000:04: busn_res: [bus 04-ff] end is updated to 04
> pci 0000:02:03.0: scanning [bus 00-00] behind bridge, pass 1
> pci_bus 0000:05: scanning bus
> pci 0000:05:00.0: [1055:7430] type 00 class 0x020000 PCIe Endpoint
> pci 0000:05:00.0: BAR 0 [mem 0x00000000-0x00001fff 64bit]
> pci 0000:05:00.0: BAR 2 [mem 0x00000000-0x000000ff 64bit]
> pci 0000:05:00.0: BAR 4 [mem 0x00000000-0x000000ff 64bit]
> pci 0000:05:00.0: PME# supported from D0 D3hot
> pci 0000:05:00.0: PME# disabled
> pci 0000:05:00.0: vgaarb: pci_notify
> pci 0000:05:00.0: ASPM: default states L0s L1
> pci_bus 0000:05: fixups for bus
> pci_bus 0000:05: bus scan returning with max=05
> pci_bus 0000:05: busn_res: [bus 05-ff] end is updated to 05
> pci_bus 0000:02: bus scan returning with max=05
> pci_bus 0000:02: busn_res: [bus 02-ff] end is updated to 05
> pci_bus 0000:01: bus scan returning with max=05
> pci 0000:00:00.0: scanning [bus 01-ff] behind bridge, pass 1
> pci_bus 0000:00: bus scan returning with max=ff
> pci 0000:02:01.0: bridge window [mem 0x00100000-0x001fffff] to [bus 03] 
> requires relaxed alignment rules
> pci 0000:02:01.0: bridge window [mem 0x00100000-0x001fffff] to [bus 03] 
> requires relaxed alignment rules
> pci 0000:02:03.0: bridge window [mem 0x00100000-0x001fffff] to [bus 05] 
> requires relaxed alignment rules
> pci 0000:00:00.0: BAR 0 [mem 0x18000000-0x180fffff]: assigned
> pci 0000:00:00.0: bridge window [mem 0x18100000-0x182fffff]: assigned
> pci 0000:00:00.0: ROM [mem 0x18300000-0x1830ffff pref]: assigned
> pci 0000:01:00.0: bridge window [mem 0x18100000-0x182fffff]: assigned
> pci 0000:02:01.0: bridge window [mem 0x18100000-0x181fffff]: assigned
> pci 0000:02:03.0: bridge window [mem 0x18200000-0x182fffff]: assigned
> pci 0000:03:00.0: BAR 0 [mem 0x18100000-0x1811ffff 64bit]: assigned
> pci 0000:03:00.0: ROM [mem 0x18120000-0x1812ffff pref]: assigned
> pci 0000:02:01.0: PCI bridge to [bus 03]
> pci 0000:02:01.0:   bridge window [mem 0x18100000-0x181fffff]
> pci 0000:02:02.0: PCI bridge to [bus 04]
> pci 0000:05:00.0: BAR 0 [mem 0x18200000-0x18201fff 64bit]: assigned
> pci 0000:05:00.0: BAR 2 [mem 0x18202000-0x182020ff 64bit]: assigned
> pci 0000:05:00.0: BAR 4 [mem 0x18202100-0x182021ff 64bit]: assigned
> pci 0000:02:03.0: PCI bridge to [bus 05]
> pci 0000:02:03.0:   bridge window [mem 0x18200000-0x182fffff]
> pci 0000:01:00.0: PCI bridge to [bus 02-05]
> pci 0000:01:00.0:   bridge window [mem 0x18100000-0x182fffff]
> pci 0000:00:00.0: PCI bridge to [bus 01-ff]
> pci 0000:00:00.0:   bridge window [mem 0x18100000-0x182fffff]
> pci_bus 0000:00: resource 4 [io  0x0000-0xffff]
> pci_bus 0000:00: resource 5 [mem 0x18000000-0x1fefffff]
> pci_bus 0000:01: resource 1 [mem 0x18100000-0x182fffff]
> pci_bus 0000:02: resource 1 [mem 0x18100000-0x182fffff]
> pci_bus 0000:03: resource 1 [mem 0x18100000-0x181fffff]
> pci_bus 0000:05: resource 1 [mem 0x18200000-0x182fffff]
> pci 0000:00:00.0: save config 0x00: 0xabcd16c3
> pci 0000:00:00.0: save config 0x04: 0x00100107
> pci 0000:00:00.0: save config 0x08: 0x06040001
> pci 0000:00:00.0: save config 0x0c: 0x00010000
> pci 0000:00:00.0: save config 0x10: 0x18000000
> pci 0000:00:00.0: save config 0x14: 0x00000000
> pci 0000:00:00.0: save config 0x18: 0x00ff0100
> pci 0000:00:00.0: save config 0x1c: 0x000000f0
> pci 0000:00:00.0: save config 0x20: 0x18201810
> pci 0000:00:00.0: save config 0x24: 0x0000fff0
> pci 0000:00:00.0: save config 0x28: 0x00000000
> pci 0000:00:00.0: save config 0x2c: 0x00000000
> pci 0000:00:00.0: save config 0x30: 0x00000000
> pci 0000:00:00.0: save config 0x34: 0x00000040
> pci 0000:00:00.0: save config 0x38: 0x00000000
> pci 0000:00:00.0: save config 0x3c: 0x000201ff
> pcieport 0000:00:00.0: vgaarb: pci_notify
> pcieport 0000:00:00.0: assign IRQ: got 201
> imx6q-pcie 33800000.pcie: msi#0 address_hi 0x0 address_lo 0x4007e000
> pcieport 0000:00:00.0: PME: Signaling with IRQ 202
> pcieport 0000:00:00.0: AER: enabled with IRQ 202
> pcieport 0000:00:00.0: bwctrl: enabled with IRQ 202
> pcieport 0000:00:00.0: save config 0x00: 0xabcd16c3
> pcieport 0000:00:00.0: save config 0x04: 0x00100507
> pcieport 0000:00:00.0: save config 0x08: 0x06040001
> pcieport 0000:00:00.0: save config 0x0c: 0x00010000
> pcieport 0000:00:00.0: save config 0x10: 0x18000000
> pcieport 0000:00:00.0: save config 0x14: 0x00000000
> pcieport 0000:00:00.0: save config 0x18: 0x00ff0100
> pcieport 0000:00:00.0: save config 0x1c: 0x000000f0
> pcieport 0000:00:00.0: save config 0x20: 0x18201810
> pcieport 0000:00:00.0: save config 0x24: 0x0000fff0
> pcieport 0000:00:00.0: save config 0x28: 0x00000000
> pcieport 0000:00:00.0: save config 0x2c: 0x00000000
> pcieport 0000:00:00.0: save config 0x30: 0x00000000
> pcieport 0000:00:00.0: save config 0x34: 0x00000040
> pcieport 0000:00:00.0: save config 0x38: 0x00000000
> pcieport 0000:00:00.0: save config 0x3c: 0x000201c9
> pcieport 0000:00:00.0: vgaarb: pci_notify
> pci 0000:01:00.0: save config 0x00: 0xb40412d8
> pci 0000:01:00.0: save config 0x04: 0x00100000
> pci 0000:01:00.0: save config 0x08: 0x06040001
> pci 0000:01:00.0: save config 0x0c: 0x00010000
> pci 0000:01:00.0: save config 0x10: 0x00000000
> pci 0000:01:00.0: save config 0x14: 0x00000000
> pci 0000:01:00.0: save config 0x18: 0x00050201
> pci 0000:01:00.0: save config 0x1c: 0x000001f1
> pci 0000:01:00.0: save config 0x20: 0x18201810
> pci 0000:01:00.0: save config 0x24: 0x0001fff1
> pci 0000:01:00.0: save config 0x28: 0x00000000
> pci 0000:01:00.0: save config 0x2c: 0x00000000
> pci 0000:01:00.0: save config 0x30: 0x00000000
> pci 0000:01:00.0: save config 0x34: 0x00000040
> pci 0000:01:00.0: save config 0x38: 0x00000000
> pci 0000:01:00.0: save config 0x3c: 0x00020000
> pcieport 0000:01:00.0: vgaarb: pci_notify
> pcieport 0000:01:00.0: assign IRQ: got 0
> pcieport 0000:01:00.0: enabling device (0000 -> 0002)
> pcieport 0000:01:00.0: save config 0x00: 0xb40412d8
> pcieport 0000:01:00.0: save config 0x04: 0x00100002
> pcieport 0000:01:00.0: save config 0x08: 0x06040001
> pcieport 0000:01:00.0: save config 0x0c: 0x00010000
> pcieport 0000:01:00.0: save config 0x10: 0x00000000
> pcieport 0000:01:00.0: save config 0x14: 0x00000000
> pcieport 0000:01:00.0: save config 0x18: 0x00050201
> pcieport 0000:01:00.0: save config 0x1c: 0x000001f1
> pcieport 0000:01:00.0: save config 0x20: 0x18201810
> pcieport 0000:01:00.0: save config 0x24: 0x0001fff1
> pcieport 0000:01:00.0: save config 0x28: 0x00000000
> pcieport 0000:01:00.0: save config 0x2c: 0x00000000
> pcieport 0000:01:00.0: save config 0x30: 0x00000000
> pcieport 0000:01:00.0: save config 0x34: 0x00000040
> pcieport 0000:01:00.0: save config 0x38: 0x00000000
> pcieport 0000:01:00.0: save config 0x3c: 0x00020000
> pcieport 0000:01:00.0: vgaarb: pci_notify
> pci 0000:02:01.0: save config 0x00: 0xb40412d8
> pci 0000:02:01.0: save config 0x04: 0x00100000
> pci 0000:02:01.0: save config 0x08: 0x06040001
> pci 0000:02:01.0: save config 0x0c: 0x00010000
> pci 0000:02:01.0: save config 0x10: 0x00000000
> pci 0000:02:01.0: save config 0x14: 0x00000000
> pci 0000:02:01.0: save config 0x18: 0x00030302
> pci 0000:02:01.0: save config 0x1c: 0x000001f1
> pci 0000:02:01.0: save config 0x20: 0x18101810
> pci 0000:02:01.0: save config 0x24: 0x0001fff1
> pci 0000:02:01.0: save config 0x28: 0x00000000
> pci 0000:02:01.0: save config 0x2c: 0x00000000
> pci 0000:02:01.0: save config 0x30: 0x00000000
> pci 0000:02:01.0: save config 0x34: 0x00000040
> pci 0000:02:01.0: save config 0x38: 0x00000000
> pci 0000:02:01.0: save config 0x3c: 0x00020000
> pcieport 0000:02:01.0: vgaarb: pci_notify
> pcieport 0000:02:01.0: assign IRQ: got 0
> pcieport 0000:01:00.0: enabling bus mastering
> pcieport 0000:02:01.0: enabling device (0000 -> 0002)
> pcieport 0000:02:01.0: save config 0x00: 0xb40412d8
> pcieport 0000:02:01.0: save config 0x04: 0x00100002
> pcieport 0000:02:01.0: save config 0x08: 0x06040001
> pcieport 0000:02:01.0: save config 0x0c: 0x00010000
> pcieport 0000:02:01.0: save config 0x10: 0x00000000
> pcieport 0000:02:01.0: save config 0x14: 0x00000000
> pcieport 0000:02:01.0: save config 0x18: 0x00030302
> pcieport 0000:02:01.0: save config 0x1c: 0x000001f1
> pcieport 0000:02:01.0: save config 0x20: 0x18101810
> pcieport 0000:02:01.0: save config 0x24: 0x0001fff1
> pcieport 0000:02:01.0: save config 0x28: 0x00000000
> pcieport 0000:02:01.0: save config 0x2c: 0x00000000
> pcieport 0000:02:01.0: save config 0x30: 0x00000000
> pcieport 0000:02:01.0: save config 0x34: 0x00000040
> pcieport 0000:02:01.0: save config 0x38: 0x00000000
> pcieport 0000:02:01.0: save config 0x3c: 0x00020000
> pcieport 0000:02:01.0: vgaarb: pci_notify
> pci 0000:02:02.0: save config 0x00: 0xb40412d8
> pci 0000:02:02.0: save config 0x04: 0x00100000
> pci 0000:02:02.0: save config 0x08: 0x06040001
> pci 0000:02:02.0: save config 0x0c: 0x00010000
> pci 0000:02:02.0: save config 0x10: 0x00000000
> pci 0000:02:02.0: save config 0x14: 0x00000000
> pci 0000:02:02.0: save config 0x18: 0x00040402
> pci 0000:02:02.0: save config 0x1c: 0x000001f1
> pci 0000:02:02.0: save config 0x20: 0x0000fff0
> pci 0000:02:02.0: save config 0x24: 0x0001fff1
> pci 0000:02:02.0: save config 0x28: 0x00000000
> pci 0000:02:02.0: save config 0x2c: 0x00000000
> pci 0000:02:02.0: save config 0x30: 0x00000000
> pci 0000:02:02.0: save config 0x34: 0x00000040
> pci 0000:02:02.0: save config 0x38: 0x00000000
> pci 0000:02:02.0: save config 0x3c: 0x00020000
> pcieport 0000:02:02.0: vgaarb: pci_notify
> pcieport 0000:02:02.0: assign IRQ: got 0
> pcieport 0000:02:02.0: enabling bus mastering
> imx6q-pcie 33800000.pcie: msi#4 address_hi 0x0 address_lo 0x4007e000
> imx6q-pcie 33800000.pcie: msi#5 address_hi 0x0 address_lo 0x4007e000
> imx6q-pcie 33800000.pcie: msi#6 address_hi 0x0 address_lo 0x4007e000
> imx6q-pcie 33800000.pcie: msi#7 address_hi 0x0 address_lo 0x4007e000
> imx6q-pcie 33800000.pcie: msi#1 address_hi 0x0 address_lo 0x4007e000
> pcieport 0000:02:02.0: bwctrl: enabled with IRQ 203
> pcieport 0000:02:02.0: save config 0x00: 0xb40412d8
> pcieport 0000:02:02.0: save config 0x04: 0x00100404
> pcieport 0000:02:02.0: save config 0x08: 0x06040001
> pcieport 0000:02:02.0: save config 0x0c: 0x00010000
> pcieport 0000:02:02.0: save config 0x10: 0x00000000
> pcieport 0000:02:02.0: save config 0x14: 0x00000000
> pcieport 0000:02:02.0: save config 0x18: 0x00040402
> pcieport 0000:02:02.0: save config 0x1c: 0x000001f1
> pcieport 0000:02:02.0: save config 0x20: 0x0000fff0
> pcieport 0000:02:02.0: save config 0x24: 0x0001fff1
> pcieport 0000:02:02.0: save config 0x28: 0x00000000
> pcieport 0000:02:02.0: save config 0x2c: 0x00000000
> pcieport 0000:02:02.0: save config 0x30: 0x00000000
> pcieport 0000:02:02.0: save config 0x34: 0x00000040
> pcieport 0000:02:02.0: save config 0x38: 0x00000000
> pcieport 0000:02:02.0: save config 0x3c: 0x00020000
> pcieport 0000:02:02.0: vgaarb: pci_notify
> pci 0000:02:03.0: save config 0x00: 0xb40412d8
> pci 0000:02:03.0: save config 0x04: 0x00100000
> pci 0000:02:03.0: save config 0x08: 0x06040001
> pci 0000:02:03.0: save config 0x0c: 0x00010000
> pci 0000:02:03.0: save config 0x10: 0x00000000
> pci 0000:02:03.0: save config 0x14: 0x00000000
> pci 0000:02:03.0: save config 0x18: 0x00050502
> pci 0000:02:03.0: save config 0x1c: 0x000001f1
> pci 0000:02:03.0: save config 0x20: 0x18201820
> pci 0000:02:03.0: save config 0x24: 0x0001fff1
> pci 0000:02:03.0: save config 0x28: 0x00000000
> pci 0000:02:03.0: save config 0x2c: 0x00000000
> pci 0000:02:03.0: save config 0x30: 0x00000000
> pci 0000:02:03.0: save config 0x34: 0x00000040
> pci 0000:02:03.0: save config 0x38: 0x00000000
> pci 0000:02:03.0: save config 0x3c: 0x00020000
> pcieport 0000:02:03.0: vgaarb: pci_notify
> pcieport 0000:02:03.0: assign IRQ: got 0
> pcieport 0000:02:03.0: enabling device (0000 -> 0002)
> pcieport 0000:02:03.0: save config 0x00: 0xb40412d8
> pcieport 0000:02:03.0: save config 0x04: 0x00100002
> pcieport 0000:02:03.0: save config 0x08: 0x06040001
> pcieport 0000:02:03.0: save config 0x0c: 0x00010000
> pcieport 0000:02:03.0: save config 0x10: 0x00000000
> pcieport 0000:02:03.0: save config 0x14: 0x00000000
> pcieport 0000:02:03.0: save config 0x18: 0x00050502
> pcieport 0000:02:03.0: save config 0x1c: 0x000001f1
> pcieport 0000:02:03.0: save config 0x20: 0x18201820
> pcieport 0000:02:03.0: save config 0x24: 0x0001fff1
> pcieport 0000:02:03.0: save config 0x28: 0x00000000
> pcieport 0000:02:03.0: save config 0x2c: 0x00000000
> pcieport 0000:02:03.0: save config 0x30: 0x00000000
> pcieport 0000:02:03.0: save config 0x34: 0x00000040
> pcieport 0000:02:03.0: save config 0x38: 0x00000000
> pcieport 0000:02:03.0: save config 0x3c: 0x00020000
> pcieport 0000:02:03.0: vgaarb: pci_notify
> pci 0000:03:00.0: save config 0x00: 0x0030168c
> pci 0000:03:00.0: save config 0x04: 0x00100000
> pci 0000:03:00.0: save config 0x08: 0x02800001
> pci 0000:03:00.0: save config 0x0c: 0x00000000
> pci 0000:03:00.0: save config 0x10: 0x18100004
> pci 0000:03:00.0: save config 0x14: 0x00000000
> pci 0000:03:00.0: save config 0x18: 0x00000000
> pci 0000:03:00.0: save config 0x1c: 0x00000000
> pci 0000:03:00.0: save config 0x20: 0x00000000
> pci 0000:03:00.0: save config 0x24: 0x00000000
> pci 0000:03:00.0: save config 0x28: 0x00000000
> pci 0000:03:00.0: save config 0x2c: 0x3116168c
> pci 0000:03:00.0: save config 0x30: 0x00000000
> pci 0000:03:00.0: save config 0x34: 0x00000040
> pci 0000:03:00.0: save config 0x38: 0x00000000
> pci 0000:03:00.0: save config 0x3c: 0x000001ff
> pci 0000:05:00.0: save config 0x00: 0x74301055
> pci 0000:05:00.0: save config 0x04: 0x00100000
> pci 0000:05:00.0: save config 0x08: 0x02000011
> pci 0000:05:00.0: save config 0x0c: 0x00000000
> pci 0000:05:00.0: save config 0x10: 0x18200004
> pci 0000:05:00.0: save config 0x14: 0x00000000
> pci 0000:05:00.0: save config 0x18: 0x18202004
> pci 0000:05:00.0: save config 0x1c: 0x00000000
> pci 0000:05:00.0: save config 0x20: 0x18202104
> pci 0000:05:00.0: save config 0x24: 0x00000000
> pci 0000:05:00.0: save config 0x28: 0x00000000
> pci 0000:05:00.0: save config 0x2c: 0x74301055
> pci 0000:05:00.0: save config 0x30: 0x00000000
> pci 0000:05:00.0: save config 0x34: 0x00000040
> pci 0000:05:00.0: save config 0x38: 0x00000000
> pci 0000:05:00.0: save config 0x3c: 0x000001ff
> VFS: Mounted root (squashfs filesystem) readonly on device 179:6.
> devtmpfs: mounted
> Freeing unused kernel memory: 896K
> Run /sbin/wrap-init as init process
>    with arguments:
>      /sbin/wrap-init
>    with environment:
>      HOME=/
>      TERM=linux
>      rootrw=/dev/mmcblk2p8
>      rootrwfstype=ext4
>      persistmnt=/dev/mmcblk2p7
>      persistmntfstype=ext4
> pcieport 0000:02:02.0: save config 0x00: 0xb40412d8
> pcieport 0000:02:02.0: save config 0x04: 0x00100404
> pcieport 0000:02:02.0: save config 0x08: 0x06040001
> pcieport 0000:02:02.0: save config 0x0c: 0x00010000
> pcieport 0000:02:02.0: save config 0x10: 0x00000000
> pcieport 0000:02:02.0: save config 0x14: 0x00000000
> pcieport 0000:02:02.0: save config 0x18: 0x00040402
> pcieport 0000:02:02.0: save config 0x1c: 0x000001f1
> pcieport 0000:02:02.0: save config 0x20: 0x0000fff0
> pcieport 0000:02:02.0: save config 0x24: 0x0001fff1
> pcieport 0000:02:02.0: save config 0x28: 0x00000000
> pcieport 0000:02:02.0: save config 0x2c: 0x00000000
> pcieport 0000:02:02.0: save config 0x30: 0x00000000
> pcieport 0000:02:02.0: save config 0x34: 0x00000040
> pcieport 0000:02:02.0: save config 0x38: 0x00000000
> pcieport 0000:02:02.0: save config 0x3c: 0x00020000
> pcieport 0000:02:02.0: PME# enabled
> imx-sdma 302c0000.dma-controller: loaded firmware 4.6
> imx-sdma 302b0000.dma-controller: loaded firmware 4.6
> imx-sdma 30bd0000.dma-controller: loaded firmware 4.6
> usb_phy_generic usbphynop1: dummy supplies not allowed for exclusive 
> requests (id=vbus)
> usb_phy_generic usbphynop2: dummy supplies not allowed for exclusive 
> requests (id=vbus)
> usbcore: registered new interface driver usbfs
> usbcore: registered new interface driver hub
> usbcore: registered new device driver usb
> cfg80211: Loading compiled-in X.509 certificates for regulatory database
> Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
> Loaded X.509 cert 'wens: 61c038651aabdcf94bd0ac7ff06c7248db18c600'
> ci_hdrc ci_hdrc.1: EHCI Host Controller
> ci_hdrc ci_hdrc.1: new USB bus registered, assigned bus number 1
> ci_hdrc ci_hdrc.1: USB 2.0 started, EHCI 1.00
> usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, 
> bcdDevice= 6.19
> usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
> usb usb1: Product: EHCI Host Controller
> usb usb1: Manufacturer: Linux 6.19.0-rc1 ehci_hcd
> usb usb1: SerialNumber: ci_hdrc.1
> hub 1-0:1.0: USB hub found
> hub 1-0:1.0: 1 port detected
> lan743x 0000:05:00.0: vgaarb: pci_notify
> lan743x 0000:05:00.0: assign IRQ: got 201
> pcieport 0000:02:03.0: enabling bus mastering
> lan743x 0000:05:00.0: enabling device (0000 -> 0002)
> lan743x 0000:05:00.0 (unnamed net_device) (uninitialized): PCI: Vendor 
> ID = 0x1055, Device ID = 0x7430
> lan743x 0000:05:00.0: enabling bus mastering
> lan743x 0000:05:00.0 (unnamed net_device) (uninitialized): ID_REV = 
> 0x74300011, FPGA_REV = 0.0
> usb 1-1: new high-speed USB device number 2 using ci_hdrc
> lan743x 0000:05:00.0 (unnamed net_device) (uninitialized): MAC address 
> set to 00:d0:12:23:fa:8b
> lan743x 0000:05:00.0: vgaarb: pci_notify
> usb 1-1: New USB device found, idVendor=0424, idProduct=2744, bcdDevice= 
> 2.21
> usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> usb 1-1: Product: USB2744
> usb 1-1: Manufacturer: Microchip Tech
> hub 1-1:1.0: USB hub found
> hub 1-1:1.0: 5 ports detected
> usb 1-1.5: new high-speed USB device number 3 using ci_hdrc
> usb 1-1.5: New USB device found, idVendor=0424, idProduct=2740, 
> bcdDevice= 2.00
> usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> usb 1-1.5: Product: Hub Controller
> usb 1-1.5: Manufacturer: Microchip Tech
> Generic PHY 30be0000.ethernet-1:00: attached PHY driver 
> (mii_bus:phy_addr=30be0000.ethernet-1:00, irq=POLL)
> fec 30be0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
> Bluetooth: Core ver 2.22
> NET: Registered PF_BLUETOOTH protocol family
> Bluetooth: HCI device and connection manager initialized
> Bluetooth: HCI socket layer initialized
> Bluetooth: L2CAP socket layer initialized
> Bluetooth: SCO socket layer initialized
> Bluetooth: BNEP (Ethernet Emulation) ver 1.3
> Bluetooth: BNEP filters: protocol multicast
> Bluetooth: BNEP socket layer initialized
> imx6q-pcie 33800000.pcie: msi#2 address_hi 0x0 address_lo 0x4007e000
> imx6q-pcie 33800000.pcie: msi#3 address_hi 0x0 address_lo 0x4007e000
> imx6q-pcie 33800000.pcie: msi#4 address_hi 0x0 address_lo 0x4007e000
> imx6q-pcie 33800000.pcie: msi#5 address_hi 0x0 address_lo 0x4007e000
> imx6q-pcie 33800000.pcie: msi#6 address_hi 0x0 address_lo 0x4007e000
> imx6q-pcie 33800000.pcie: msi#7 address_hi 0x0 address_lo 0x4007e000
> lan743x 0000:05:00.0 eth1: using MSIX interrupts, number of vectors = 6
> lan743x 0000:05:00.0 eth1: PHY [pci-0000:05:00.0:01] driver [Generic 
> PHY] (irq=POLL)
> lan743x 0000:05:00.0 eth1: configuring for phy/gmii link mode
> lan743x 0000:05:00.0 eth1: Link is Up - 1Gbps/Full - flow control rx/tx
> imx8m-blk-ctrl 38330000.blk-ctrl: sync_state() pending due to 
> 38310000.video-codec
> imx8m-blk-ctrl 38330000.blk-ctrl: sync_state() pending due to 
> 38300000.video-codec
> imx-pgc imx-pgc-domain.5: sync_state() pending due to 38008000.gpu
> imx-pgc imx-pgc-domain.5: sync_state() pending due to 38000000.gpu
> ath9k 0000:03:00.0: vgaarb: pci_notify
> ath9k 0000:03:00.0: assign IRQ: got 201
> pcieport 0000:02:01.0: enabling bus mastering
> ath9k 0000:03:00.0: enabling device (0000 -> 0002)
> ath9k 0000:03:00.0: enabling bus mastering
> ath: EEPROM regdomain: 0x37
> ath: EEPROM indicates we should expect a direct regpair map
> ath: Country alpha2 being used: AL
> ath: Regpair used: 0x37
> ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
> ieee80211 phy0: Atheros AR9300 Rev:3 mem=0x00000000ce8f30fa, irq=201
> ath9k 0000:03:00.0: vgaarb: pci_notify



^ permalink raw reply	[flat|nested] 8+ messages in thread

* [REGRESSION] Re: imx8 PCI regression since "iommu: Get DT/ACPI parsing into the proper probe path"
  2026-01-13  9:17 ` Nicolas Cavallari
@ 2026-01-16 16:52   ` Nicolas Cavallari
  2026-01-16 17:10     ` Jason Gunthorpe
  2026-01-16 17:24     ` Robin Murphy
  0 siblings, 2 replies; 8+ messages in thread
From: Nicolas Cavallari @ 2026-01-16 16:52 UTC (permalink / raw)
  To: iommu, linux-pci, linux-arm-kernel, linux-kernel
  Cc: Bjorn Helgaas, Rob Herring (Arm), Robin Murphy, Lorenzo Pieralisi,
	Jason Gunthorpe, Joerg Roedel, regressions

+cc regressions ML

Le 13/01/2026 à 10:17, Nicolas Cavallari a écrit :
> +cc patch author & reviewers
> 
> On 1/9/26 17:22, Nicolas Cavallari wrote:
>> When upgrading from 6.12 to a 6.18 kernel, I noticed that a PCI
>> Ethernet adapter (Microchip LAN7430) would hang under load and not
>> recover.  When that happens, some of its registers indicate it is
>> failing to do DMA reads, so cannot reclaim entries on its ring buffer.
>>
>> I bisected the problem into this commit:
>>
>> commit bcb81ac6ae3c2ef95b44e7b54c3c9522364a245c
>> Author: Robin Murphy <robin.murphy@arm.com>
>> Date:   Fri Feb 28 15:46:33 2025 +0000
>>
>>       iommu: Get DT/ACPI parsing into the proper probe path
>>
>> The problem still exists on 6.19-rc1, on pci/next (29a77b4897f1) and on
>> iommu/master (360e85353769) trees.  Reverting the commit fixes the issue.

The problem persists on 6.19-rc5

>> The system is a Gateworks GW7200, which is a i.MX 8 Mini connected to a
>> Pericom
>> PI7C9X2G404 4-port switch connected to the LAN7430 chip.
>>
>> -[0000:00]---00.0-[01-ff]----00.0-[02-05]--+-01.0-[03]----00.0
>>                                              +-02.0-[04]--
>>                                              \-03.0-[05]----00.0
>>
>> The problem only occurs when there is at least another PCI device in use
>> on the
>> switch.  It does not happen if the LAN7430 is the only PCI device, or if
>> the
>> other devices are not actively used.  For example i can reproduce it
>> with an
>> ath9k wireless network adapter when it is up and running, but not when
>> it is
>> down or its driver is not loaded.
>>
>> I suspect that other PCI devices have similar issues, but the LAN7430 is
>> the
>> easiest one to diagnose, as it hangs within seconds with an iperf3 --
>> bidir -u
>> -b 200M and its register map are public.
>>
>> I couldn't find an way to dump the PCI address translation mapping from
>> userspace.
>> I would be happy to provide more information or test patches.

I debugged it further, it seems to be mostly a PCI issue since the system does 
not actually have an IOMMU.

When examining changes in the PCI configuration (lspci -vvvv), the main 
difference is that, with the patch, Access Control Services are enabled on the 
PCI switch.

         Capabilities: [220 v1] Access Control Services
                 ACSCap: SrcValid+ TransBlk+ ReqRedir+ CmpltRedir+ UpstreamFwd+ 
EgressCtrl+ DirectTrans+
-               ACSCtl: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd- 
EgressCtrl- DirectTrans-
+               ACSCtl: SrcValid+ TransBlk- ReqRedir+ CmpltRedir+ UpstreamFwd+ 
EgressCtrl- DirectTrans-

If I manually patch the config space in sysfs and re-disable ACS on the port 
connected to the LAN7430, I cannot reproduce the problem.  In fact, disabling 
only ReqRedir is enough to work around the issue.

I also read up on AER and I'm surprised that I don't see anything in dmesg when 
the problem occurs, even through UERcvd+ start appearing on the root context and 
AdvNonFatalErr+ appears on the switch.

>> ---- lspci -v

Instead, here is lspci -vvvv after the network card hangs.

00:00.0 PCI bridge: Synopsys, Inc. DWC_usb3 / PCIe bridge (rev 01) (prog-if 00 
[Normal decode])
         Device tree node: 
/sys/firmware/devicetree/base/soc@0/pcie@33800000/pcie@0,0
         Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B- DisINTx+
         Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR+ <PERR- INTx-
         Latency: 0
         Interrupt: pin A routed to IRQ 202
         Region 0: Memory at 18000000 (32-bit, non-prefetchable) [size=1M]
         Bus: primary=00, secondary=01, subordinate=ff, sec-latency=0
         I/O behind bridge: f000-0fff [disabled] [16-bit]
         Memory behind bridge: 18100000-182fffff [size=2M] [32-bit]
         Prefetchable memory behind bridge: fff00000-000fffff [disabled] [32-bit]
         Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- <SERR+ <PERR-
         Expansion ROM at 18300000 [virtual] [disabled] [size=64K]
         BridgeCtl: Parity- SERR+ NoISA- VGA- VGA16- MAbort- >Reset- FastB2B-
                 PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
         Capabilities: [40] Power Management version 3
                 Flags: PMEClk- DSI- D1+ D2- AuxCurrent=375mA 
PME(D0+,D1+,D2-,D3hot+,D3cold+)
                 Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
         Capabilities: [50] MSI: Enable+ Count=1/1 Maskable+ 64bit+
                 Address: 0000000040043000  Data: 0000
                 Masking: 00000000  Pending: 00000000
         Capabilities: [70] Express (v2) Root Port (Slot-), IntMsgNum 0
                 DevCap: MaxPayload 128 bytes, PhantFunc 0
                         ExtTag- RBE+ TEE-IO-
                 DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq+
                         RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop-
                         MaxPayload 128 bytes, MaxReadReq 512 bytes
                 DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+ 
TransPend-
                 LnkCap: Port #0, Speed 5GT/s, Width x1, ASPM L0s L1, Exit 
Latency L0s <1us, L1 <8us
                         ClockPM- Surprise- LLActRep+ BwNot+ ASPMOptComp+
                 LnkCtl: ASPM L0s Enabled; RCB 64 bytes, LnkDisable- CommClk-
                         ExtSynch- ClockPM- AutWidDis- BWInt+ AutBWInt+ FltModeDis-
                 LnkSta: Speed 5GT/s, Width x1
                         TrErr- Train- SlotClk+ DLActive+ BWMgmt- ABWMgmt-
                 RootCap: CRSVisible+
                 RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna+ 
CRSVisible+
                 RootSta: PME ReqID 0000, PMEStatus- PMEPending-
                 DevCap2: Completion Timeout: Range ABCD, TimeoutDis+ NROPrPrP+ LTR-
                          10BitTagComp- 10BitTagReq- OBFF Not Supported, ExtFmt- 
EETLPPrefix-
                          EmergencyPowerReduction Not Supported, 
EmergencyPowerReductionInit-
                          FRS- LN System CLS Not Supported, TPHComp- ExtTPHComp- 
ARIFwd-
                          AtomicOpsCap: Routing- 32bit- 64bit- 128bitCAS-
                 DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd-
                          AtomicOpsCtl: ReqEn- EgressBlck-
                          IDOReq- IDOCompl- LTR- EmergencyPowerReductionReq-
                          10BitTagReq- OBFF Disabled, EETLPPrefixBlk-
                 LnkCap2: Supported Link Speeds: 2.5-5GT/s, Crosslink- Retimer- 
2Retimers- DRS-
                 LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-
                          Transmit Margin: Normal Operating Range, 
EnterModifiedCompliance- ComplianceSOS-
                          Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB 
preshoot
                 LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- 
EqualizationPhase1-
                          EqualizationPhase2- EqualizationPhase3- 
LinkEqualizationRequest-
                          Retimer- 2Retimers- CrosslinkRes: unsupported, FltMode-
         Capabilities: [100 v2] Advanced Error Reporting
                 UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr+ BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF+ MalfTLP+
                         ECRC- UnsupReq- ACSViol- UncorrIntErr+ BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr- CorrIntErr- HeaderOF-
                 CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr+ CorrIntErr+ HeaderOF+
                 AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn- 
ECRCChkCap+ ECRCChkEn-
                         MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
                 HeaderLog: 00000000 00000000 00000000 00000000
                 RootCmd: CERptEn+ NFERptEn+ FERptEn+
                 RootSta: CERcvd- MultCERcvd- UERcvd+ MultUERcvd-
                          FirstFatal- NonFatalMsg+ FatalMsg- IntMsgNum 0
                 ErrorSrc: ERR_COR: 0000 ERR_FATAL/NONFATAL: 0500
         Capabilities: [148 v1] L1 PM Substates
                 L1SubCap: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1- 
L1_PM_Substates-
                 L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
                 L1SubCtl2:
         Kernel driver in use: pcieport

01:00.0 PCI bridge: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4-Port/4-Lane 
Packet Switch (rev 01) (prog-if 00 [Normal decode])
         Device tree node: 
/sys/firmware/devicetree/base/soc@0/pcie@33800000/pcie@0,0/pcie@0,0
         Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
         Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
         Latency: 0
         Bus: primary=01, secondary=02, subordinate=05, sec-latency=0
         I/O behind bridge: 0000f000-00000fff [disabled] [32-bit]
         Memory behind bridge: 18100000-182fffff [size=2M] [32-bit]
         Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff 
[disabled] [64-bit]
         Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- <SERR- <PERR-
         BridgeCtl: Parity- SERR+ NoISA- VGA- VGA16- MAbort- >Reset- FastB2B-
                 PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
         Capabilities: [40] Power Management version 3
                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA 
PME(D0+,D1+,D2+,D3hot+,D3cold+)
                 Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
         Capabilities: [4c] MSI: Enable- Count=1/4 Maskable+ 64bit+
                 Address: 0000000000000000  Data: 0000
                 Masking: 00000000  Pending: 00000000
         Capabilities: [64] Vendor Specific Information: Len=34 <?>
         Capabilities: [b0] Subsystem: Device 0000:0000
         Capabilities: [c0] Express (v2) Upstream Port, IntMsgNum 0
                 DevCap: MaxPayload 256 bytes, PhantFunc 0
                         ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ SlotPowerLimit 
0W TEE-IO-
                 DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq+
                         RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
                         MaxPayload 128 bytes, MaxReadReq 128 bytes
                 DevSta: CorrErr+ NonFatalErr- FatalErr- UnsupReq+ AuxPwr+ 
TransPend-
                 LnkCap: Port #0, Speed 5GT/s, Width x1, ASPM L0s L1, Exit 
Latency L0s <512ns, L1 <1us
                         ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp-
                 LnkCtl: ASPM Disabled; LnkDisable- CommClk-
                         ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- FltModeDis-
                 LnkSta: Speed 5GT/s, Width x1
                         TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
                 DevCap2: Completion Timeout: Not Supported, TimeoutDis- 
NROPrPrP- LTR+
                          10BitTagComp- 10BitTagReq- OBFF Via message, ExtFmt- 
EETLPPrefix-
                          EmergencyPowerReduction Not Supported, 
EmergencyPowerReductionInit-
                          FRS-
                          AtomicOpsCap: Routing-
                 DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-
                          AtomicOpsCtl: EgressBlck-
                          IDOReq- IDOCompl- LTR- EmergencyPowerReductionReq-
                          10BitTagReq- OBFF Disabled, EETLPPrefixBlk-
                 LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-
                          Transmit Margin: Normal Operating Range, 
EnterModifiedCompliance- ComplianceSOS-
                          Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB 
preshoot
                 LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- 
EqualizationPhase1-
                          EqualizationPhase2- EqualizationPhase3- 
LinkEqualizationRequest-
                          Retimer- 2Retimers- CrosslinkRes: unsupported, FltMode-
         Capabilities: [100 v1] Advanced Error Reporting
                 UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UESvrt: DLP+ SDES- TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF+ MalfTLP+
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr+ CorrIntErr- HeaderOF-
                 CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr+ CorrIntErr- HeaderOF-
                 AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn- 
ECRCChkCap+ ECRCChkEn-
                         MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
                 HeaderLog: 00000000 00000000 00000000 00000000
         Capabilities: [140 v1] Virtual Channel
                 Caps:   LPEVC=0 RefClk=100ns PATEntryBits=4
                 Arb:    Fixed- WRR32- WRR64- WRR128-
                 Ctrl:   ArbSelect=Fixed
                 Status: InProgress-
                 VC0:    Caps:   PATOffset=04 MaxTimeSlots=128 RejSnoopTrans-
                         Arb:    Fixed+ WRR32- WRR64- WRR128+ TWRR128- WRR256-
                         Ctrl:   Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
                         Status: NegoPending- InProgress-
                         Port Arbitration Table <?>
         Capabilities: [20c v1] Power Budgeting <?>
         Capabilities: [230 v1] Latency Tolerance Reporting
                 Max snoop latency: 0ns
                 Max no snoop latency: 0ns
         Capabilities: [240 v1] L1 PM Substates
                 L1SubCap: PCI-PM_L1.2- PCI-PM_L1.1+ ASPM_L1.2- ASPM_L1.1+ 
L1_PM_Substates+
                 L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
                 L1SubCtl2:
         Capabilities: [260 v1] Precision Time Measurement
                 PTMCap: Requester+ Responder+ Root+
                 PTMClockGranularity: Unimplemented
                 PTMControl: Enabled- RootSelected-
                 PTMEffectiveGranularity: Unknown
         Kernel driver in use: pcieport

02:01.0 PCI bridge: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4-Port/4-Lane 
Packet Switch (rev 01) (prog-if 00 [Normal decode])
         Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
         Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
         Latency: 0
         Bus: primary=02, secondary=03, subordinate=03, sec-latency=0
         I/O behind bridge: 0000f000-00000fff [disabled] [32-bit]
         Memory behind bridge: 18100000-181fffff [size=1M] [32-bit]
         Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff 
[disabled] [64-bit]
         Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- <SERR- <PERR-
         BridgeCtl: Parity- SERR+ NoISA- VGA- VGA16- MAbort- >Reset- FastB2B-
                 PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
         Capabilities: [40] Power Management version 3
                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA 
PME(D0+,D1+,D2+,D3hot+,D3cold+)
                 Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
         Capabilities: [4c] MSI: Enable- Count=1/4 Maskable+ 64bit+
                 Address: 0000000000000000  Data: 0000
                 Masking: 00000000  Pending: 00000000
         Capabilities: [64] Vendor Specific Information: Len=34 <?>
         Capabilities: [b0] Subsystem: Device 0000:0000
         Capabilities: [c0] Express (v2) Downstream Port (Slot+), IntMsgNum 0
                 DevCap: MaxPayload 256 bytes, PhantFunc 0
                         ExtTag- RBE+ TEE-IO-
                 DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq+
                         RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
                         MaxPayload 128 bytes, MaxReadReq 128 bytes
                 DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+ 
TransPend-
                 LnkCap: Port #1, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit 
Latency L0s <512ns, L1 <1us
                         ClockPM- Surprise+ LLActRep+ BwNot+ ASPMOptComp-
                 LnkCtl: ASPM Disabled; LnkDisable- CommClk-
                         ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- FltModeDis-
                 LnkSta: Speed 2.5GT/s, Width x1
                         TrErr- Train- SlotClk- DLActive+ BWMgmt- ABWMgmt-
                 SltCap: AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
                         Slot #1, PowerLimit 0W; Interlock- NoCompl-
                 SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- 
LinkChg-
                         Control: AttnInd Off, PwrInd Off, Power- Interlock-
                 SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ 
Interlock-
                         Changed: MRL- PresDet- LinkState+
                 DevCap2: Completion Timeout: Not Supported, TimeoutDis- 
NROPrPrP- LTR+
                          10BitTagComp- 10BitTagReq- OBFF Via message, ExtFmt- 
EETLPPrefix-
                          EmergencyPowerReduction Not Supported, 
EmergencyPowerReductionInit-
                          FRS- ARIFwd-
                          AtomicOpsCap: Routing-
                 DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd-
                          AtomicOpsCtl: EgressBlck-
                          IDOReq- IDOCompl- LTR- EmergencyPowerReductionReq-
                          10BitTagReq- OBFF Disabled, EETLPPrefixBlk-
                 LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-, 
Selectable De-emphasis: -3.5dB
                          Transmit Margin: Normal Operating Range, 
EnterModifiedCompliance- ComplianceSOS-
                          Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB 
preshoot
                 LnkSta2: Current De-emphasis Level: -3.5dB, 
EqualizationComplete- EqualizationPhase1-
                          EqualizationPhase2- EqualizationPhase3- 
LinkEqualizationRequest-
                          Retimer- 2Retimers- CrosslinkRes: unsupported, FltMode-
         Capabilities: [100 v1] Advanced Error Reporting
                 UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF+ MalfTLP+
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr- CorrIntErr- HeaderOF-
                 CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr+ CorrIntErr- HeaderOF-
                 AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn- 
ECRCChkCap+ ECRCChkEn-
                         MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
                 HeaderLog: 00000000 00000000 00000000 00000000
         Capabilities: [140 v1] Virtual Channel
                 Caps:   LPEVC=0 RefClk=100ns PATEntryBits=4
                 Arb:    Fixed- WRR32- WRR64- WRR128-
                 Ctrl:   ArbSelect=Fixed
                 Status: InProgress-
                 VC0:    Caps:   PATOffset=04 MaxTimeSlots=128 RejSnoopTrans-
                         Arb:    Fixed+ WRR32- WRR64- WRR128+ TWRR128- WRR256-
                         Ctrl:   Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
                         Status: NegoPending- InProgress-
                         Port Arbitration Table <?>
         Capabilities: [20c v1] Power Budgeting <?>
         Capabilities: [220 v1] Access Control Services
                 ACSCap: SrcValid+ TransBlk+ ReqRedir+ CmpltRedir+ UpstreamFwd+ 
EgressCtrl+ DirectTrans+
                 ACSCtl: SrcValid+ TransBlk- ReqRedir+ CmpltRedir+ UpstreamFwd+ 
EgressCtrl- DirectTrans-
         Capabilities: [240 v1] L1 PM Substates
                 L1SubCap: PCI-PM_L1.2- PCI-PM_L1.1+ ASPM_L1.2- ASPM_L1.1+ 
L1_PM_Substates+
                 L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
                 L1SubCtl2:
         Capabilities: [250 v1] Downstream Port Containment
                 DpcCap: IntMsgNum 1, RPExt- PoisonedTLP- SwTrigger- RP PIO Log 
0, DL_ActiveErr-
                 DpcCtl: Trigger:0 Cmpl- INT- ErrCor- PoisonedTLP- SwTrigger- 
DL_ActiveErr-
                 DpcSta: Trigger- Reason:00 INT- RPBusy- TriggerExt:00 RP PIO 
ErrPtr:00
                 Source: 0000
         Kernel driver in use: pcieport

02:02.0 PCI bridge: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4-Port/4-Lane 
Packet Switch (rev 01) (prog-if 00 [Normal decode])
         Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx+
         Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
         Latency: 0
         Interrupt: pin ? routed to IRQ 203
         Bus: primary=02, secondary=04, subordinate=04, sec-latency=0
         I/O behind bridge: 0000f000-00000fff [disabled] [32-bit]
         Memory behind bridge: fff00000-000fffff [disabled] [32-bit]
         Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff 
[disabled] [64-bit]
         Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- <SERR- <PERR-
         BridgeCtl: Parity- SERR+ NoISA- VGA- VGA16- MAbort- >Reset- FastB2B-
                 PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
         Capabilities: [40] Power Management version 3
                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA 
PME(D0+,D1+,D2+,D3hot+,D3cold+)
                 Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME-
         Capabilities: [4c] MSI: Enable+ Count=1/4 Maskable+ 64bit+
                 Address: 0000000040043000  Data: 0001
                 Masking: 0000000e  Pending: 00000000
         Capabilities: [64] Vendor Specific Information: Len=34 <?>
         Capabilities: [b0] Subsystem: Device 0000:0000
         Capabilities: [c0] Express (v2) Downstream Port (Slot+), IntMsgNum 0
                 DevCap: MaxPayload 256 bytes, PhantFunc 0
                         ExtTag- RBE+ TEE-IO-
                 DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq+
                         RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
                         MaxPayload 128 bytes, MaxReadReq 128 bytes
                 DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+ 
TransPend-
                 LnkCap: Port #2, Speed 5GT/s, Width x1, ASPM L0s L1, Exit 
Latency L0s <512ns, L1 <1us
                         ClockPM- Surprise+ LLActRep+ BwNot+ ASPMOptComp-
                 LnkCtl: ASPM Disabled; LnkDisable- CommClk-
                         ExtSynch- ClockPM- AutWidDis- BWInt+ AutBWInt+ FltModeDis-
                 LnkSta: Speed 2.5GT/s, Width x1
                         TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
                 SltCap: AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
                         Slot #2, PowerLimit 0W; Interlock- NoCompl-
                 SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- 
LinkChg-
                         Control: AttnInd Off, PwrInd Off, Power- Interlock-
                 SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ 
Interlock-
                         Changed: MRL- PresDet- LinkState-
                 DevCap2: Completion Timeout: Not Supported, TimeoutDis- 
NROPrPrP- LTR+
                          10BitTagComp- 10BitTagReq- OBFF Via message, ExtFmt- 
EETLPPrefix-
                          EmergencyPowerReduction Not Supported, 
EmergencyPowerReductionInit-
                          FRS- ARIFwd-
                          AtomicOpsCap: Routing-
                 DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd-
                          AtomicOpsCtl: EgressBlck-
                          IDOReq- IDOCompl- LTR- EmergencyPowerReductionReq-
                          10BitTagReq- OBFF Disabled, EETLPPrefixBlk-
                 LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-, 
Selectable De-emphasis: -3.5dB
                          Transmit Margin: Normal Operating Range, 
EnterModifiedCompliance- ComplianceSOS-
                          Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB 
preshoot
                 LnkSta2: Current De-emphasis Level: -3.5dB, 
EqualizationComplete- EqualizationPhase1-
                          EqualizationPhase2- EqualizationPhase3- 
LinkEqualizationRequest-
                          Retimer- 2Retimers- CrosslinkRes: unsupported, FltMode-
         Capabilities: [100 v1] Advanced Error Reporting
                 UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF+ MalfTLP+
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr- CorrIntErr- HeaderOF-
                 CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr+ CorrIntErr- HeaderOF-
                 AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn- 
ECRCChkCap+ ECRCChkEn-
                         MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
                 HeaderLog: 00000000 00000000 00000000 00000000
         Capabilities: [140 v1] Virtual Channel
                 Caps:   LPEVC=0 RefClk=100ns PATEntryBits=4
                 Arb:    Fixed- WRR32- WRR64- WRR128-
                 Ctrl:   ArbSelect=Fixed
                 Status: InProgress-
                 VC0:    Caps:   PATOffset=04 MaxTimeSlots=128 RejSnoopTrans-
                         Arb:    Fixed+ WRR32- WRR64- WRR128+ TWRR128- WRR256-
                         Ctrl:   Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
                         Status: NegoPending+ InProgress-
                         Port Arbitration Table <?>
         Capabilities: [20c v1] Power Budgeting <?>
         Capabilities: [220 v1] Access Control Services
                 ACSCap: SrcValid+ TransBlk+ ReqRedir+ CmpltRedir+ UpstreamFwd+ 
EgressCtrl+ DirectTrans+
                 ACSCtl: SrcValid+ TransBlk- ReqRedir+ CmpltRedir+ UpstreamFwd+ 
EgressCtrl- DirectTrans-
         Capabilities: [240 v1] L1 PM Substates
                 L1SubCap: PCI-PM_L1.2- PCI-PM_L1.1+ ASPM_L1.2- ASPM_L1.1+ 
L1_PM_Substates+
                 L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
                 L1SubCtl2:
         Capabilities: [250 v1] Downstream Port Containment
                 DpcCap: IntMsgNum 1, RPExt- PoisonedTLP- SwTrigger- RP PIO Log 
0, DL_ActiveErr-
                 DpcCtl: Trigger:0 Cmpl- INT- ErrCor- PoisonedTLP- SwTrigger- 
DL_ActiveErr-
                 DpcSta: Trigger- Reason:00 INT- RPBusy- TriggerExt:00 RP PIO 
ErrPtr:00
                 Source: 0000
         Kernel driver in use: pcieport

02:03.0 PCI bridge: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4-Port/4-Lane 
Packet Switch (rev 01) (prog-if 00 [Normal decode])
         Device tree node: 
/sys/firmware/devicetree/base/soc@0/pcie@33800000/pcie@0,0/pcie@0,0/pcie@3,0
         Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
         Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
         Latency: 0
         Bus: primary=02, secondary=05, subordinate=05, sec-latency=0
         I/O behind bridge: 0000f000-00000fff [disabled] [32-bit]
         Memory behind bridge: 18200000-182fffff [size=1M] [32-bit]
         Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff 
[disabled] [64-bit]
         Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- <SERR+ <PERR-
         BridgeCtl: Parity- SERR+ NoISA- VGA- VGA16- MAbort- >Reset- FastB2B-
                 PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
         Capabilities: [40] Power Management version 3
                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA 
PME(D0+,D1+,D2+,D3hot+,D3cold+)
                 Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
         Capabilities: [4c] MSI: Enable- Count=1/4 Maskable+ 64bit+
                 Address: 0000000000000000  Data: 0000
                 Masking: 00000000  Pending: 00000000
         Capabilities: [64] Vendor Specific Information: Len=34 <?>
         Capabilities: [b0] Subsystem: Device 0000:0000
         Capabilities: [c0] Express (v2) Downstream Port (Slot+), IntMsgNum 0
                 DevCap: MaxPayload 256 bytes, PhantFunc 0
                         ExtTag- RBE+ TEE-IO-
                 DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq+
                         RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
                         MaxPayload 128 bytes, MaxReadReq 128 bytes
                 DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+ 
TransPend-
                 LnkCap: Port #3, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit 
Latency L0s <512ns, L1 <1us
                         ClockPM- Surprise+ LLActRep+ BwNot+ ASPMOptComp-
                 LnkCtl: ASPM L1 Enabled; LnkDisable- CommClk-
                         ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- FltModeDis-
                 LnkSta: Speed 2.5GT/s, Width x1
                         TrErr- Train- SlotClk- DLActive+ BWMgmt- ABWMgmt-
                 SltCap: AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
                         Slot #3, PowerLimit 0W; Interlock- NoCompl-
                 SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- 
LinkChg-
                         Control: AttnInd Off, PwrInd Off, Power- Interlock-
                 SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ 
Interlock-
                         Changed: MRL- PresDet- LinkState+
                 DevCap2: Completion Timeout: Not Supported, TimeoutDis- 
NROPrPrP- LTR+
                          10BitTagComp- 10BitTagReq- OBFF Via message, ExtFmt- 
EETLPPrefix-
                          EmergencyPowerReduction Not Supported, 
EmergencyPowerReductionInit-
                          FRS- ARIFwd-
                          AtomicOpsCap: Routing-
                 DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd-
                          AtomicOpsCtl: EgressBlck-
                          IDOReq- IDOCompl- LTR- EmergencyPowerReductionReq-
                          10BitTagReq- OBFF Disabled, EETLPPrefixBlk-
                 LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-, 
Selectable De-emphasis: -3.5dB
                          Transmit Margin: Normal Operating Range, 
EnterModifiedCompliance- ComplianceSOS-
                          Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB 
preshoot
                 LnkSta2: Current De-emphasis Level: -3.5dB, 
EqualizationComplete- EqualizationPhase1-
                          EqualizationPhase2- EqualizationPhase3- 
LinkEqualizationRequest-
                          Retimer- 2Retimers- CrosslinkRes: unsupported, FltMode-
         Capabilities: [100 v1] Advanced Error Reporting
                 UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF+ MalfTLP+
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr- CorrIntErr- HeaderOF-
                 CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr+ CorrIntErr- HeaderOF-
                 AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn- 
ECRCChkCap+ ECRCChkEn-
                         MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
                 HeaderLog: 00000000 00000000 00000000 00000000
         Capabilities: [140 v1] Virtual Channel
                 Caps:   LPEVC=0 RefClk=100ns PATEntryBits=4
                 Arb:    Fixed- WRR32- WRR64- WRR128-
                 Ctrl:   ArbSelect=Fixed
                 Status: InProgress-
                 VC0:    Caps:   PATOffset=04 MaxTimeSlots=128 RejSnoopTrans-
                         Arb:    Fixed+ WRR32- WRR64- WRR128+ TWRR128- WRR256-
                         Ctrl:   Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
                         Status: NegoPending- InProgress-
                         Port Arbitration Table <?>
         Capabilities: [20c v1] Power Budgeting <?>
         Capabilities: [220 v1] Access Control Services
                 ACSCap: SrcValid+ TransBlk+ ReqRedir+ CmpltRedir+ UpstreamFwd+ 
EgressCtrl+ DirectTrans+
                 ACSCtl: SrcValid+ TransBlk- ReqRedir+ CmpltRedir+ UpstreamFwd+ 
EgressCtrl- DirectTrans-
         Capabilities: [240 v1] L1 PM Substates
                 L1SubCap: PCI-PM_L1.2- PCI-PM_L1.1+ ASPM_L1.2- ASPM_L1.1+ 
L1_PM_Substates+
                 L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
                 L1SubCtl2:
         Capabilities: [250 v1] Downstream Port Containment
                 DpcCap: IntMsgNum 1, RPExt- PoisonedTLP- SwTrigger- RP PIO Log 
0, DL_ActiveErr-
                 DpcCtl: Trigger:0 Cmpl- INT- ErrCor- PoisonedTLP- SwTrigger- 
DL_ActiveErr-
                 DpcSta: Trigger- Reason:00 INT- RPBusy- TriggerExt:00 RP PIO 
ErrPtr:00
                 Source: 0000
         Kernel driver in use: pcieport

03:00.0 Network controller: Qualcomm Atheros AR93xx Wireless Network Adapter 
(rev 01)
         Subsystem: Qualcomm Atheros Device 3116
         Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
         Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx+
         Latency: 0, Cache Line Size: 64 bytes
         Interrupt: pin A routed to IRQ 201
         Region 0: Memory at 18100000 (64-bit, non-prefetchable) [size=128K]
         Expansion ROM at 18120000 [virtual] [disabled] [size=64K]
         Capabilities: [40] Power Management version 3
                 Flags: PMEClk- DSI- D1+ D2- AuxCurrent=375mA 
PME(D0+,D1+,D2-,D3hot+,D3cold-)
                 Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
         Capabilities: [50] MSI: Enable- Count=1/4 Maskable+ 64bit+
                 Address: 0000000000000000  Data: 0000
                 Masking: 00000000  Pending: 00000000
         Capabilities: [70] Express (v2) Endpoint, IntMsgNum 0
                 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <1us, L1 
<8us
                         ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- 
SlotPowerLimit 0W TEE-IO-
                 DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq+
                         RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop-
                         MaxPayload 128 bytes, MaxReadReq 512 bytes
                 DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr- 
TransPend-
                 LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit 
Latency L0s <2us, L1 <64us
                         ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp-
                 LnkCtl: ASPM L0s Enabled; RCB 64 bytes, LnkDisable- CommClk-
                         ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- FltModeDis-
                 LnkSta: Speed 2.5GT/s, Width x1
                         TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
                 DevCap2: Completion Timeout: Not Supported, TimeoutDis+ 
NROPrPrP- LTR-
                          10BitTagComp- 10BitTagReq- OBFF Not Supported, ExtFmt- 
EETLPPrefix-
                          EmergencyPowerReduction Not Supported, 
EmergencyPowerReductionInit-
                          FRS- TPHComp- ExtTPHComp-
                          AtomicOpsCap: 32bit- 64bit- 128bitCAS-
                 DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-
                          AtomicOpsCtl: ReqEn-
                          IDOReq- IDOCompl- LTR- EmergencyPowerReductionReq-
                          10BitTagReq- OBFF Disabled, EETLPPrefixBlk-
                 LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-
                          Transmit Margin: Normal Operating Range, 
EnterModifiedCompliance- ComplianceSOS-
                          Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB 
preshoot
                 LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- 
EqualizationPhase1-
                          EqualizationPhase2- EqualizationPhase3- 
LinkEqualizationRequest-
                          Retimer- 2Retimers- CrosslinkRes: unsupported, FltMode-
         Capabilities: [100 v1] Advanced Error Reporting
                 UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF+ MalfTLP+
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr- CorrIntErr- HeaderOF-
                 CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr+ CorrIntErr- HeaderOF-
                 AERCap: First Error Pointer: 00, ECRCGenCap- ECRCGenEn- 
ECRCChkCap- ECRCChkEn-
                         MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
                 HeaderLog: 00000000 00000000 00000000 00000000
         Capabilities: [140 v1] Virtual Channel
                 Caps:   LPEVC=0 RefClk=100ns PATEntryBits=1
                 Arb:    Fixed- WRR32- WRR64- WRR128-
                 Ctrl:   ArbSelect=Fixed
                 Status: InProgress-
                 VC0:    Caps:   PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
                         Arb:    Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
                         Ctrl:   Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
                         Status: NegoPending- InProgress-
         Capabilities: [300 v1] Device Serial Number 00-00-00-00-00-00-00-00
         Kernel driver in use: ath9k
         Kernel modules: ath9k

05:00.0 Ethernet controller: Microchip Technology / SMSC LAN7430 (rev 11)
         Subsystem: Microchip Technology / SMSC LAN7430
         Device tree node: 
/sys/firmware/devicetree/base/soc@0/pcie@33800000/pcie@0,0/pcie@0,0/pcie@3,0/ethernet@0,0
         Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx+
         Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
         Latency: 0
         Interrupt: pin A routed to IRQ 201
         Region 0: Memory at 18200000 (64-bit, non-prefetchable) [size=8K]
         Region 2: Memory at 18202000 (64-bit, non-prefetchable) [size=256]
         Region 4: Memory at 18202100 (64-bit, non-prefetchable) [size=256]
         Capabilities: [40] Power Management version 3
                 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA 
PME(D0+,D1-,D2-,D3hot+,D3cold-)
                 Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
         Capabilities: [50] MSI: Enable- Count=1/8 Maskable+ 64bit+
                 Address: 0000000000000000  Data: 0000
                 Masking: 00000000  Pending: 00000000
         Capabilities: [70] Express (v2) Endpoint, IntMsgNum 0
                 DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <512ns, 
L1 <32us
                         ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ 
SlotPowerLimit 0W TEE-IO-
                 DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq+
                         RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop- FLReset-
                         MaxPayload 128 bytes, MaxReadReq 512 bytes
                 DevSta: CorrErr+ NonFatalErr+ FatalErr- UnsupReq- AuxPwr- 
TransPend-
                 LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit 
Latency L0s <1us, L1 <8us
                         ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
                 LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes, LnkDisable- CommClk-
                         ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- FltModeDis-
                 LnkSta: Speed 2.5GT/s, Width x1
                         TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
                 DevCap2: Completion Timeout: Range ABCD, TimeoutDis+ NROPrPrP- LTR+
                          10BitTagComp- 10BitTagReq- OBFF Via message/WAKE#, 
ExtFmt- EETLPPrefix-
                          EmergencyPowerReduction Not Supported, 
EmergencyPowerReductionInit-
                          FRS+ TPHComp- ExtTPHComp-
                          AtomicOpsCap: 32bit- 64bit- 128bitCAS-
                 DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-
                          AtomicOpsCtl: ReqEn-
                          IDOReq- IDOCompl- LTR- EmergencyPowerReductionReq-
                          10BitTagReq- OBFF Disabled, EETLPPrefixBlk-
                 LnkCap2: Supported Link Speeds: 2.5GT/s, Crosslink- Retimer- 
2Retimers- DRS+
                 LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-
                          Transmit Margin: Normal Operating Range, 
EnterModifiedCompliance- ComplianceSOS-
                          Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB 
preshoot
                 LnkSta2: Current De-emphasis Level: -3.5dB, 
EqualizationComplete- EqualizationPhase1-
                          EqualizationPhase2- EqualizationPhase3- 
LinkEqualizationRequest-
                          Retimer- 2Retimers- CrosslinkRes: unsupported, FltMode-
         Capabilities: [b0] MSI-X: Enable+ Count=8 Masked-
                 Vector table: BAR=2 offset=00000000
                 PBA: BAR=4 offset=00000000
         Capabilities: [100 v2] Advanced Error Reporting
                 UESta:  DLP- SDES- TLP- FCP- CmpltTO+ CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr- BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF- MalfTLP-
                         ECRC- UnsupReq- ACSViol- UncorrIntErr+ BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- 
RxOF+ MalfTLP+
                         ECRC- UnsupReq- ACSViol- UncorrIntErr+ BlockedTLP- 
AtomicOpBlocked- TLPBlockedErr-
                         PoisonTLPBlocked- DMWrReqBlocked- IDECheck- MisIDETLP- 
PCRC_CHECK- TLPXlatBlocked-
                 CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr+ CorrIntErr- HeaderOF-
                 CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- 
AdvNonFatalErr+ CorrIntErr+ HeaderOF+
                 AERCap: First Error Pointer: 0e, ECRCGenCap+ ECRCGenEn- 
ECRCChkCap+ ECRCChkEn-
                         MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
                 HeaderLog: 00000000 00000000 00000000 00000000
         Capabilities: [148 v1] Device Serial Number 00-d0-12-ff-ff-23-fa-8b
         Capabilities: [158 v1] Latency Tolerance Reporting
                 Max snoop latency: 0ns
                 Max no snoop latency: 0ns
         Capabilities: [160 v1] L1 PM Substates
                 L1SubCap: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+ 
L1_PM_Substates+
                           PortCommonModeRestoreTime=10us PortTPowerOnTime=10us
                 L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
                            T_CommonMode=0us LTR1.2_Threshold=0ns
                 L1SubCtl2: T_PwrOn=10us
         Capabilities: [170 v1] Vendor Specific Information: ID=0002 Rev=4 
Len=100 <?>
         Kernel driver in use: lan743x
         Kernel modules: lan743x

>> ---- dmesg:
>>
>> Booting Linux on physical CPU 0x0000000000 [0x410fd034]
>> Linux version 6.19.0-rc1 (buildroot@buildroot) (aarch64-buildroot-linux-
>> musl-gcc.br_real (Buildroot 2025.11-rc2-7266-g8a41889b4d) 14.3.0, GNU ld
>> (GNU Binutils) 2.43.1) #1 SMP PREEMPT Thu Dec 11 22:43:20 UTC 2025
>> KASLR disabled due to lack of seed
>> Machine model: Gateworks Venice GW72xx-0x i.MX8MM Development Kit
>> OF: reserved mem: Reserved memory: No reserved-memory node in the DT
>> Zone ranges:
>>     DMA      [mem 0x0000000040000000-0x00000000ffffffff]
>>     DMA32    empty
>>     Normal   [mem 0x0000000100000000-0x000000013fffffff]
>> Movable zone start for each node
>> Early memory node ranges
>>     node   0: [mem 0x0000000040000000-0x000000013fffffff]
>> Initmem setup node 0 [mem 0x0000000040000000-0x000000013fffffff]
>> cma: Reserved 32 MiB at 0x00000000fe000000
>> psci: probing for conduit method from DT.
>> psci: PSCIv1.1 detected in firmware.
>> psci: Using standard PSCI v0.2 function IDs
>> psci: MIGRATE_INFO_TYPE not supported.
>> psci: SMC Calling Convention v1.5
>> percpu: Embedded 22 pages/cpu s49304 r8192 d32616 u90112
>> pcpu-alloc: s49304 r8192 d32616 u90112 alloc=22*4096
>> pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
>> Detected VIPT I-cache on CPU0
>> CPU features: detected: GICv3 CPU interface
>> CPU features: detected: ARM erratum 845719
>> alternatives: applying boot alternatives
>> Kernel command line: root=/dev/mmcblk2p6 rootrw=/dev/mmcblk2p8
>> rootrwfstype=ext4 persistmnt=/dev/mmcblk2p7 persistmntfstype=ext4 init=/
>> sbin/wrap-init
>> Unknown kernel command line parameters "rootrw=/dev/mmcblk2p8
>> rootrwfstype=ext4 persistmnt=/dev/mmcblk2p7 persistmntfstype=ext4", will
>> be passed to user space.
>> printk: log buffer data + meta data: 131072 + 458752 = 589824 bytes
>> Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes, linear)
>> Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes, linear)
>> software IO TLB: area num 4.
>> software IO TLB: mapped [mem 0x00000000fa000000-0x00000000fe000000] (64MB)
>> Built 1 zonelists, mobility grouping on.  Total pages: 1048576
>> mem auto-init: stack:off, heap alloc:off, heap free:off
>> SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
>> rcu: Preemptible hierarchical RCU implementation.
>> rcu:     RCU event tracing is enabled.
>> rcu:     RCU restricting CPUs from NR_CPUS=256 to nr_cpu_ids=4.
>>       Trampoline variant of Tasks RCU enabled.
>>       Tracing variant of Tasks RCU enabled.
>> rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
>> rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
>> RCU Tasks: Setting shift to 2 and lim to 1 rcu_task_cb_adjust=1
>> rcu_task_cpu_ids=4.
>> RCU Tasks Trace: Setting shift to 2 and lim to 1 rcu_task_cb_adjust=1
>> rcu_task_cpu_ids=4.
>> NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
>> GICv3: GIC: Using split EOI/Deactivate mode
>> GICv3: 128 SPIs implemented
>> GICv3: 0 Extended SPIs implemented
>> Root IRQ handler: gic_handle_irq
>> GICv3: GICv3 features: 16 PPIs
>> GICv3: GICD_CTLR.DS=0, SCR_EL3.FIQ=1
>> GICv3: CPU0: found redistributor 0 region 0:0x0000000038880000
>> ITS: No ITS available, not enabling LPIs
>> rcu: srcu_init: Setting srcu_struct sizes based on contention.
>> arch_timer: cp15 timer running at 8.00MHz (phys).
>> clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles:
>> 0x1d854df40, max_idle_ns: 440795202120 ns
>> sched_clock: 56 bits at 8MHz, resolution 125ns, wraps every 2199023255500ns
>> Console: colour dummy device 80x25
>> printk: legacy console [tty0] enabled
>> Calibrating delay loop (skipped), value calculated using timer
>> frequency.. 16.00 BogoMIPS (lpj=32000)
>> pid_max: default: 32768 minimum: 301
>> Mount-cache hash table entries: 8192 (order: 4, 65536 bytes, linear)
>> Mountpoint-cache hash table entries: 8192 (order: 4, 65536 bytes, linear)
>> rcu: Hierarchical SRCU implementation.
>> rcu:     Max phase no-delay instances is 1000.
>> Timer migration: 1 hierarchy levels; 8 children per group; 1 crossnode
>> level
>> smp: Bringing up secondary CPUs ...
>> Detected VIPT I-cache on CPU1
>> GICv3: CPU1: found redistributor 1 region 0:0x00000000388a0000
>> CPU1: Booted secondary processor 0x0000000001 [0x410fd034]
>> Detected VIPT I-cache on CPU2
>> GICv3: CPU2: found redistributor 2 region 0:0x00000000388c0000
>> CPU2: Booted secondary processor 0x0000000002 [0x410fd034]
>> Detected VIPT I-cache on CPU3
>> GICv3: CPU3: found redistributor 3 region 0:0x00000000388e0000
>> CPU3: Booted secondary processor 0x0000000003 [0x410fd034]
>> smp: Brought up 1 node, 4 CPUs
>> SMP: Total of 4 processors activated.
>> CPU: All CPU(s) started at EL2
>> CPU features: detected: 32-bit EL0 Support
>> CPU features: detected: CRC32 instructions
>> CPU features: detected: PMUv3
>> alternatives: applying system-wide alternatives
>> Memory: 3998528K/4194304K available (8384K kernel code, 888K rwdata,
>> 2348K rodata, 896K init, 337K bss, 159960K reserved, 32768K cma-reserved)
>> devtmpfs: initialized
>> clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff,
>> max_idle_ns: 7645041785100000 ns
>> posixtimers hash table entries: 2048 (order: 3, 32768 bytes, linear)
>> futex hash table entries: 1024 (65536 bytes on 1 NUMA nodes, total 64
>> KiB, linear).
>> 29504 pages in range for non-PLT usage
>> 521024 pages in range for PLT usage
>> NET: Registered PF_NETLINK/PF_ROUTE protocol family
>> DMA: preallocated 512 KiB GFP_KERNEL pool for atomic allocations
>> DMA: preallocated 512 KiB GFP_KERNEL|GFP_DMA pool for atomic allocations
>> DMA: preallocated 512 KiB GFP_KERNEL|GFP_DMA32 pool for atomic allocations
>> thermal_sys: Registered thermal governor 'step_wise'
>> cpuidle: using governor menu
>> hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
>> ASID allocator initialised with 65536 entries
>> /soc@0: Fixed dependency cycle(s) with /soc@0/bus@30000000/
>> efuse@30350000/unique-id@4
>> /soc@0/interrupt-controller@38800000: Fixed dependency cycle(s) with /
>> soc@0/interrupt-controller@38800000
>> /soc@0/bus@30000000/pinctrl@30330000: Fixed dependency cycle(s) with /
>> soc@0/bus@30000000/pinctrl@30330000/hoggrp
>> imx8mm-pinctrl 30330000.pinctrl: initialized IMX pinctrl driver
>> /soc@0/bus@30000000/efuse@30350000: Fixed dependency cycle(s) with /
>> soc@0/bus@30000000/clock-controller@30380000
>> /soc@0/bus@30000000/efuse@30350000: Fixed dependency cycle(s) with /
>> soc@0/bus@30000000/clock-controller@30380000
>> /soc@0/bus@30000000/clock-controller@30380000: Fixed dependency cycle(s)
>> with /soc@0/interrupt-controller@38800000
>> iommu: Default domain type: Translated
>> iommu: DMA domain TLB invalidation policy: strict mode
>> pps_core: LinuxPPS API ver. 1 registered
>> pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti
>> <giometti@linux.it>
>> EDAC MC: Ver: 3.0.0
>> vgaarb: loaded
>> clocksource: Switched to clocksource arch_sys_counter
>> VFS: Disk quotas dquot_6.6.0
>> VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
>> NET: Registered PF_INET protocol family
>> IP idents hash table entries: 65536 (order: 7, 524288 bytes, linear)
>> tcp_listen_portaddr_hash hash table entries: 2048 (order: 3, 32768
>> bytes, linear)
>> Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear)
>> TCP established hash table entries: 32768 (order: 6, 262144 bytes, linear)
>> TCP bind hash table entries: 32768 (order: 8, 1048576 bytes, linear)
>> TCP: Hash tables configured (established 32768 bind 32768)
>> UDP hash table entries: 2048 (order: 5, 131072 bytes, linear)
>> UDP-Lite hash table entries: 2048 (order: 5, 131072 bytes, linear)
>> NET: Registered PF_UNIX/PF_LOCAL protocol family
>> PCI: CLS 0 bytes, default 64
>> ARM FF-A: FFA_VERSION returned not supported
>> Initialise system trusted keyrings
>> workingset: timestamp_bits=62 max_order=20 bucket_order=0
>> squashfs: version 4.0 (2009/01/31) Phillip Lougher
>> Key type asymmetric registered
>> Asymmetric key parser 'x509' registered
>> io scheduler mq-deadline registered
>> io scheduler kyber registered
>> mxs-dma 33000000.dma-controller: initialized
>> SoC: i.MX8MM revision 1.0
>> 30860000.serial: ttymxc0 at MMIO 0x30860000 (irq = 15, base_baud =
>> 1500000) is a IMX
>> 30880000.serial: ttymxc2 at MMIO 0x30880000 (irq = 16, base_baud =
>> 1500000) is a IMX
>> 30890000.serial: ttymxc1 at MMIO 0x30890000 (irq = 17, base_baud =
>> 1500000) is a IMX
>> imx-uart 30890000.serial: Console IMX rounded baud rate from 114286 to
>> 114300
>> printk: console [ttymxc1] enabled
>> 30a60000.serial: ttymxc3 at MMIO 0x30a60000 (irq = 18, base_baud =
>> 1500000) is a IMX
>> wireguard: WireGuard 1.0.0 loaded. See www.wireguard.com for information.
>> wireguard: Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>.
>> All Rights Reserved.
>> i2c_dev: i2c /dev entries driver
>> sdhci: Secure Digital Host Controller Interface driver
>> sdhci: Copyright(c) Pierre Ossman
>> sdhci-pltfm: SDHCI platform and OF driver helper
>> SMCCC: SOC_ID: ARCH_SOC_ID not implemented, skipping ....
>> caam 30900000.crypto: Entropy delay = 3200
>> caam 30900000.crypto: Entropy delay = 6400
>> caam 30900000.crypto: Instantiated RNG4 SH0
>> mmc2: SDHCI controller on 30b60000.mmc [30b60000.mmc] using ADMA
>> caam 30900000.crypto: Instantiated RNG4 SH1
>> caam 30900000.crypto: device ID = 0x0a16040100000000 (Era 9)
>> caam 30900000.crypto: job rings = 2, qi = 0
>> trusted_key: caam algorithms registered in /proc/crypto
>> caam 30900000.crypto: registering rng-caam
>> caam 30900000.crypto: rng crypto API alg registered prng-caam
>> mmc2: new HS400 Enhanced strobe MMC card at address 0001
>> mmcblk2: mmc2:0001 IY2964 58.3 GiB
>> hw perfevents: enabled with armv8_cortex_a53 PMU driver, 7 (0,8000003f)
>> counters available
>> nvmem imx-ocotp0: cell mac-address raw len 6 unaligned to nvmem word size 4
>> /soc@0: Fixed dependency cycle(s) with /soc@0/bus@30000000/efuse@30350000
>> NET: Registered PF_INET6 protocol family
>>    mmcblk2: p1 p2 < p5 p6 p7 p8 p9 >
>> Segment Routing with IPv6
>> In-situ OAM (IOAM) with IPv6
>> NET: Registered PF_PACKET protocol family
>> mmcblk2boot0: mmc2:0001 IY2964 4.00 MiB
>> registered taskstats version 1
>> Loading compiled-in X.509 certificates
>> mmcblk2boot1: mmc2:0001 IY2964 4.00 MiB
>> mmcblk2rpmb: mmc2:0001 IY2964 4.00 MiB, chardev (249:0)
>> gpio gpiochip0: Static allocation of GPIO base is deprecated, use
>> dynamic allocation.
>> gpio gpiochip1: Static allocation of GPIO base is deprecated, use
>> dynamic allocation.
>> random: crng init done
>> gpio gpiochip2: Static allocation of GPIO base is deprecated, use
>> dynamic allocation.
>> gpio gpiochip3: Static allocation of GPIO base is deprecated, use
>> dynamic allocation.
>> gpio gpiochip4: Static allocation of GPIO base is deprecated, use
>> dynamic allocation.
>> i2c i2c-0: using pinctrl states for GPIO recovery
>> i2c i2c-0: using generic GPIOs for recovery
>> gateworks-gsc 0-0020: Gateworks System Controller v66: fw 0xa691
>> pca953x 0-0023: supply vcc not found, using dummy regulator
>> pca953x 0-0023: using no auto increment
>> at24 0-0050: supply vcc not found, using dummy regulator
>> at24 0-0050: 256 byte 24c02 EEPROM, writable, 16 bytes/write
>> at24 0-0051: supply vcc not found, using dummy regulator
>> at24 0-0051: 256 byte 24c02 EEPROM, writable, 16 bytes/write
>> at24 0-0052: supply vcc not found, using dummy regulator
>> at24 0-0052: 256 byte 24c02 EEPROM, writable, 16 bytes/write
>> at24 0-0053: supply vcc not found, using dummy regulator
>> at24 0-0053: 256 byte 24c02 EEPROM, writable, 16 bytes/write
>> rtc-ds1672 0-0068: registered as rtc0
>> rtc-ds1672 0-0068: setting system clock to 2026-01-09T14:32:53 UTC
>> (1767969173)
>> i2c i2c-0: IMX I2C adapter registered
>> i2c i2c-1: using generic GPIOs for recovery
>> at24 1-0052: supply vcc not found, using dummy regulator
>> at24 1-0052: 4096 byte 24c32 EEPROM, writable, 32 bytes/write
>> i2c i2c-1: IMX I2C adapter registered
>> i2c i2c-2: IMX I2C adapter registered
>> imx6q-pcie 33800000.pcie: host bridge /soc@0/pcie@33800000 ranges:
>> imx6q-pcie 33800000.pcie: Parsing ranges property...
>> imx6q-pcie 33800000.pcie:       IO 0x001ff80000..0x001ff8ffff ->
>> 0x0000000000
>> imx6q-pcie 33800000.pcie:      MEM 0x0018000000..0x001fefffff ->
>> 0x0018000000
>> imx6q-pcie 33800000.pcie: config reg[1] 0x1ff00000 == cpu 0x1ff00000
>> ; no fixup was ever needed for this devicetree
>> imx-cpufreq-dt imx-cpufreq-dt: cpu speed grade 2 mkt segment 2
>> supported-hw 0x4 0x4
>> clk: Disabling unused clocks
>> PM: genpd: Disabling unused power domains
>> sdhci-esdhc-imx 30b50000.mmc: Got CD GPIO
>> check access for rdinit=/init failed: -2, ignoring
>> mmc1: SDHCI controller on 30b50000.mmc [30b50000.mmc] using ADMA
>> imx6q-pcie 33800000.pcie: Using 32 MSI vectors
>> imx6q-pcie 33800000.pcie: iATU: unroll T, 4 ob, 4 ib, align 64K, limit 4G
>> imx6q-pcie 33800000.pcie: PCIe Gen.2 x1 link up
>> imx6q-pcie 33800000.pcie: PCI host bridge to bus 0000:00
>> pci_bus 0000:00: root bus resource [bus 00-ff]
>> pci_bus 0000:00: root bus resource [io  0x0000-0xffff]
>> pci_bus 0000:00: root bus resource [mem 0x18000000-0x1fefffff]
>> pci_bus 0000:00: scanning bus
>> pci 0000:00:00.0: [16c3:abcd] type 01 class 0x060400 PCIe Root Port
>> pci 0000:00:00.0: BAR 0 [mem 0x00000000-0x000fffff]
>> pci 0000:00:00.0: ROM [mem 0x00000000-0x0000ffff pref]
>> pci 0000:00:00.0: PCI bridge to [bus 01-ff]
>> pci 0000:00:00.0:   bridge window [io  0x0000-0x0fff]
>> pci 0000:00:00.0:   bridge window [mem 0x00000000-0x000fffff]
>> pci 0000:00:00.0:   bridge window [mem 0x00000000-0x000fffff pref]
>> pci 0000:00:00.0: supports D1
>> pci 0000:00:00.0: PME# supported from D0 D1 D3hot D3cold
>> pci 0000:00:00.0: PME# disabled
>> pci 0000:00:00.0: vgaarb: pci_notify
>> pci_bus 0000:00: fixups for bus
>> pci 0000:00:00.0: scanning [bus 01-ff] behind bridge, pass 0
>> pci_bus 0000:01: scanning bus
>> pci 0000:01:00.0: [12d8:b404] type 01 class 0x060400 PCIe Switch
>> Upstream Port
>> pci 0000:01:00.0: PCI bridge to [bus 00]
>> pci 0000:01:00.0:   bridge window [io  0x0000-0x0fff]
>> pci 0000:01:00.0:   bridge window [mem 0x00000000-0x000fffff]
>> pci 0000:01:00.0:   bridge window [mem 0x00000000-0x000fffff 64bit pref]
>> pci 0000:01:00.0: supports D1 D2
>> pci 0000:01:00.0: PME# supported from D0 D1 D2 D3hot D3cold
>> pci 0000:01:00.0: PME# disabled
>> pci 0000:01:00.0: PTM enabled (root), unknown granularity
>> pci 0000:01:00.0: vgaarb: pci_notify
>> pci 0000:01:00.0: ASPM: default states L0s L1
>> pci_bus 0000:01: fixups for bus
>> pci 0000:01:00.0: scanning [bus 00-00] behind bridge, pass 0
>> pci 0000:01:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
>> pci 0000:01:00.0: scanning [bus 00-00] behind bridge, pass 1
>> pci_bus 0000:02: scanning bus
>> pci 0000:02:01.0: [12d8:b404] type 01 class 0x060400 PCIe Switch
>> Downstream Port
>> pci 0000:02:01.0: PCI bridge to [bus 00]
>> pci 0000:02:01.0:   bridge window [io  0x0000-0x0fff]
>> pci 0000:02:01.0:   bridge window [mem 0x00000000-0x000fffff]
>> pci 0000:02:01.0:   bridge window [mem 0x00000000-0x000fffff 64bit pref]
>> pci 0000:02:01.0: supports D1 D2
>> pci 0000:02:01.0: PME# supported from D0 D1 D2 D3hot D3cold
>> pci 0000:02:01.0: PME# disabled
>> pci 0000:02:01.0: vgaarb: pci_notify
>> pci 0000:02:02.0: [12d8:b404] type 01 class 0x060400 PCIe Switch
>> Downstream Port
>> pci 0000:02:02.0: PCI bridge to [bus 00]
>> pci 0000:02:02.0:   bridge window [io  0x0000-0x0fff]
>> pci 0000:02:02.0:   bridge window [mem 0x00000000-0x000fffff]
>> pci 0000:02:02.0:   bridge window [mem 0x00000000-0x000fffff 64bit pref]
>> pci 0000:02:02.0: supports D1 D2
>> pci 0000:02:02.0: PME# supported from D0 D1 D2 D3hot D3cold
>> pci 0000:02:02.0: PME# disabled
>> pci 0000:02:02.0: vgaarb: pci_notify
>> pci 0000:02:03.0: [12d8:b404] type 01 class 0x060400 PCIe Switch
>> Downstream Port
>> pci 0000:02:03.0: PCI bridge to [bus 00]
>> pci 0000:02:03.0:   bridge window [io  0x0000-0x0fff]
>> pci 0000:02:03.0:   bridge window [mem 0x00000000-0x000fffff]
>> pci 0000:02:03.0:   bridge window [mem 0x00000000-0x000fffff 64bit pref]
>> pci 0000:02:03.0: supports D1 D2
>> pci 0000:02:03.0: PME# supported from D0 D1 D2 D3hot D3cold
>> pci 0000:02:03.0: PME# disabled
>> pci 0000:02:03.0: vgaarb: pci_notify
>> pci_bus 0000:02: fixups for bus
>> pci 0000:02:01.0: scanning [bus 00-00] behind bridge, pass 0
>> pci 0000:02:01.0: bridge configuration invalid ([bus 00-00]), reconfiguring
>> pci 0000:02:02.0: scanning [bus 00-00] behind bridge, pass 0
>> pci 0000:02:02.0: bridge configuration invalid ([bus 00-00]), reconfiguring
>> pci 0000:02:03.0: scanning [bus 00-00] behind bridge, pass 0
>> pci 0000:02:03.0: bridge configuration invalid ([bus 00-00]), reconfiguring
>> pci 0000:02:01.0: scanning [bus 00-00] behind bridge, pass 1
>> pci_bus 0000:03: scanning bus
>> pci 0000:03:00.0: [168c:0030] type 00 class 0x028000 PCIe Endpoint
>> pci 0000:03:00.0: BAR 0 [mem 0x00000000-0x0001ffff 64bit]
>> pci 0000:03:00.0: ROM [mem 0x00000000-0x0000ffff pref]
>> pci 0000:03:00.0: supports D1
>> pci 0000:03:00.0: PME# supported from D0 D1 D3hot
>> pci 0000:03:00.0: PME# disabled
>> pci 0000:03:00.0: vgaarb: pci_notify
>> pci 0000:03:00.0: ASPM: default states L0s L1
>> pci_bus 0000:03: fixups for bus
>> pci_bus 0000:03: bus scan returning with max=03
>> pci_bus 0000:03: busn_res: [bus 03-ff] end is updated to 03
>> pci 0000:02:02.0: scanning [bus 00-00] behind bridge, pass 1
>> pci_bus 0000:04: scanning bus
>> pci_bus 0000:04: fixups for bus
>> pci_bus 0000:04: bus scan returning with max=04
>> pci_bus 0000:04: busn_res: [bus 04-ff] end is updated to 04
>> pci 0000:02:03.0: scanning [bus 00-00] behind bridge, pass 1
>> pci_bus 0000:05: scanning bus
>> pci 0000:05:00.0: [1055:7430] type 00 class 0x020000 PCIe Endpoint
>> pci 0000:05:00.0: BAR 0 [mem 0x00000000-0x00001fff 64bit]
>> pci 0000:05:00.0: BAR 2 [mem 0x00000000-0x000000ff 64bit]
>> pci 0000:05:00.0: BAR 4 [mem 0x00000000-0x000000ff 64bit]
>> pci 0000:05:00.0: PME# supported from D0 D3hot
>> pci 0000:05:00.0: PME# disabled
>> pci 0000:05:00.0: vgaarb: pci_notify
>> pci 0000:05:00.0: ASPM: default states L0s L1
>> pci_bus 0000:05: fixups for bus
>> pci_bus 0000:05: bus scan returning with max=05
>> pci_bus 0000:05: busn_res: [bus 05-ff] end is updated to 05
>> pci_bus 0000:02: bus scan returning with max=05
>> pci_bus 0000:02: busn_res: [bus 02-ff] end is updated to 05
>> pci_bus 0000:01: bus scan returning with max=05
>> pci 0000:00:00.0: scanning [bus 01-ff] behind bridge, pass 1
>> pci_bus 0000:00: bus scan returning with max=ff
>> pci 0000:02:01.0: bridge window [mem 0x00100000-0x001fffff] to [bus 03]
>> requires relaxed alignment rules
>> pci 0000:02:01.0: bridge window [mem 0x00100000-0x001fffff] to [bus 03]
>> requires relaxed alignment rules
>> pci 0000:02:03.0: bridge window [mem 0x00100000-0x001fffff] to [bus 05]
>> requires relaxed alignment rules
>> pci 0000:00:00.0: BAR 0 [mem 0x18000000-0x180fffff]: assigned
>> pci 0000:00:00.0: bridge window [mem 0x18100000-0x182fffff]: assigned
>> pci 0000:00:00.0: ROM [mem 0x18300000-0x1830ffff pref]: assigned
>> pci 0000:01:00.0: bridge window [mem 0x18100000-0x182fffff]: assigned
>> pci 0000:02:01.0: bridge window [mem 0x18100000-0x181fffff]: assigned
>> pci 0000:02:03.0: bridge window [mem 0x18200000-0x182fffff]: assigned
>> pci 0000:03:00.0: BAR 0 [mem 0x18100000-0x1811ffff 64bit]: assigned
>> pci 0000:03:00.0: ROM [mem 0x18120000-0x1812ffff pref]: assigned
>> pci 0000:02:01.0: PCI bridge to [bus 03]
>> pci 0000:02:01.0:   bridge window [mem 0x18100000-0x181fffff]
>> pci 0000:02:02.0: PCI bridge to [bus 04]
>> pci 0000:05:00.0: BAR 0 [mem 0x18200000-0x18201fff 64bit]: assigned
>> pci 0000:05:00.0: BAR 2 [mem 0x18202000-0x182020ff 64bit]: assigned
>> pci 0000:05:00.0: BAR 4 [mem 0x18202100-0x182021ff 64bit]: assigned
>> pci 0000:02:03.0: PCI bridge to [bus 05]
>> pci 0000:02:03.0:   bridge window [mem 0x18200000-0x182fffff]
>> pci 0000:01:00.0: PCI bridge to [bus 02-05]
>> pci 0000:01:00.0:   bridge window [mem 0x18100000-0x182fffff]
>> pci 0000:00:00.0: PCI bridge to [bus 01-ff]
>> pci 0000:00:00.0:   bridge window [mem 0x18100000-0x182fffff]
>> pci_bus 0000:00: resource 4 [io  0x0000-0xffff]
>> pci_bus 0000:00: resource 5 [mem 0x18000000-0x1fefffff]
>> pci_bus 0000:01: resource 1 [mem 0x18100000-0x182fffff]
>> pci_bus 0000:02: resource 1 [mem 0x18100000-0x182fffff]
>> pci_bus 0000:03: resource 1 [mem 0x18100000-0x181fffff]
>> pci_bus 0000:05: resource 1 [mem 0x18200000-0x182fffff]
>> pci 0000:00:00.0: save config 0x00: 0xabcd16c3
>> pci 0000:00:00.0: save config 0x04: 0x00100107
>> pci 0000:00:00.0: save config 0x08: 0x06040001
>> pci 0000:00:00.0: save config 0x0c: 0x00010000
>> pci 0000:00:00.0: save config 0x10: 0x18000000
>> pci 0000:00:00.0: save config 0x14: 0x00000000
>> pci 0000:00:00.0: save config 0x18: 0x00ff0100
>> pci 0000:00:00.0: save config 0x1c: 0x000000f0
>> pci 0000:00:00.0: save config 0x20: 0x18201810
>> pci 0000:00:00.0: save config 0x24: 0x0000fff0
>> pci 0000:00:00.0: save config 0x28: 0x00000000
>> pci 0000:00:00.0: save config 0x2c: 0x00000000
>> pci 0000:00:00.0: save config 0x30: 0x00000000
>> pci 0000:00:00.0: save config 0x34: 0x00000040
>> pci 0000:00:00.0: save config 0x38: 0x00000000
>> pci 0000:00:00.0: save config 0x3c: 0x000201ff
>> pcieport 0000:00:00.0: vgaarb: pci_notify
>> pcieport 0000:00:00.0: assign IRQ: got 201
>> imx6q-pcie 33800000.pcie: msi#0 address_hi 0x0 address_lo 0x4007e000
>> pcieport 0000:00:00.0: PME: Signaling with IRQ 202
>> pcieport 0000:00:00.0: AER: enabled with IRQ 202
>> pcieport 0000:00:00.0: bwctrl: enabled with IRQ 202
>> pcieport 0000:00:00.0: save config 0x00: 0xabcd16c3
>> pcieport 0000:00:00.0: save config 0x04: 0x00100507
>> pcieport 0000:00:00.0: save config 0x08: 0x06040001
>> pcieport 0000:00:00.0: save config 0x0c: 0x00010000
>> pcieport 0000:00:00.0: save config 0x10: 0x18000000
>> pcieport 0000:00:00.0: save config 0x14: 0x00000000
>> pcieport 0000:00:00.0: save config 0x18: 0x00ff0100
>> pcieport 0000:00:00.0: save config 0x1c: 0x000000f0
>> pcieport 0000:00:00.0: save config 0x20: 0x18201810
>> pcieport 0000:00:00.0: save config 0x24: 0x0000fff0
>> pcieport 0000:00:00.0: save config 0x28: 0x00000000
>> pcieport 0000:00:00.0: save config 0x2c: 0x00000000
>> pcieport 0000:00:00.0: save config 0x30: 0x00000000
>> pcieport 0000:00:00.0: save config 0x34: 0x00000040
>> pcieport 0000:00:00.0: save config 0x38: 0x00000000
>> pcieport 0000:00:00.0: save config 0x3c: 0x000201c9
>> pcieport 0000:00:00.0: vgaarb: pci_notify
>> pci 0000:01:00.0: save config 0x00: 0xb40412d8
>> pci 0000:01:00.0: save config 0x04: 0x00100000
>> pci 0000:01:00.0: save config 0x08: 0x06040001
>> pci 0000:01:00.0: save config 0x0c: 0x00010000
>> pci 0000:01:00.0: save config 0x10: 0x00000000
>> pci 0000:01:00.0: save config 0x14: 0x00000000
>> pci 0000:01:00.0: save config 0x18: 0x00050201
>> pci 0000:01:00.0: save config 0x1c: 0x000001f1
>> pci 0000:01:00.0: save config 0x20: 0x18201810
>> pci 0000:01:00.0: save config 0x24: 0x0001fff1
>> pci 0000:01:00.0: save config 0x28: 0x00000000
>> pci 0000:01:00.0: save config 0x2c: 0x00000000
>> pci 0000:01:00.0: save config 0x30: 0x00000000
>> pci 0000:01:00.0: save config 0x34: 0x00000040
>> pci 0000:01:00.0: save config 0x38: 0x00000000
>> pci 0000:01:00.0: save config 0x3c: 0x00020000
>> pcieport 0000:01:00.0: vgaarb: pci_notify
>> pcieport 0000:01:00.0: assign IRQ: got 0
>> pcieport 0000:01:00.0: enabling device (0000 -> 0002)
>> pcieport 0000:01:00.0: save config 0x00: 0xb40412d8
>> pcieport 0000:01:00.0: save config 0x04: 0x00100002
>> pcieport 0000:01:00.0: save config 0x08: 0x06040001
>> pcieport 0000:01:00.0: save config 0x0c: 0x00010000
>> pcieport 0000:01:00.0: save config 0x10: 0x00000000
>> pcieport 0000:01:00.0: save config 0x14: 0x00000000
>> pcieport 0000:01:00.0: save config 0x18: 0x00050201
>> pcieport 0000:01:00.0: save config 0x1c: 0x000001f1
>> pcieport 0000:01:00.0: save config 0x20: 0x18201810
>> pcieport 0000:01:00.0: save config 0x24: 0x0001fff1
>> pcieport 0000:01:00.0: save config 0x28: 0x00000000
>> pcieport 0000:01:00.0: save config 0x2c: 0x00000000
>> pcieport 0000:01:00.0: save config 0x30: 0x00000000
>> pcieport 0000:01:00.0: save config 0x34: 0x00000040
>> pcieport 0000:01:00.0: save config 0x38: 0x00000000
>> pcieport 0000:01:00.0: save config 0x3c: 0x00020000
>> pcieport 0000:01:00.0: vgaarb: pci_notify
>> pci 0000:02:01.0: save config 0x00: 0xb40412d8
>> pci 0000:02:01.0: save config 0x04: 0x00100000
>> pci 0000:02:01.0: save config 0x08: 0x06040001
>> pci 0000:02:01.0: save config 0x0c: 0x00010000
>> pci 0000:02:01.0: save config 0x10: 0x00000000
>> pci 0000:02:01.0: save config 0x14: 0x00000000
>> pci 0000:02:01.0: save config 0x18: 0x00030302
>> pci 0000:02:01.0: save config 0x1c: 0x000001f1
>> pci 0000:02:01.0: save config 0x20: 0x18101810
>> pci 0000:02:01.0: save config 0x24: 0x0001fff1
>> pci 0000:02:01.0: save config 0x28: 0x00000000
>> pci 0000:02:01.0: save config 0x2c: 0x00000000
>> pci 0000:02:01.0: save config 0x30: 0x00000000
>> pci 0000:02:01.0: save config 0x34: 0x00000040
>> pci 0000:02:01.0: save config 0x38: 0x00000000
>> pci 0000:02:01.0: save config 0x3c: 0x00020000
>> pcieport 0000:02:01.0: vgaarb: pci_notify
>> pcieport 0000:02:01.0: assign IRQ: got 0
>> pcieport 0000:01:00.0: enabling bus mastering
>> pcieport 0000:02:01.0: enabling device (0000 -> 0002)
>> pcieport 0000:02:01.0: save config 0x00: 0xb40412d8
>> pcieport 0000:02:01.0: save config 0x04: 0x00100002
>> pcieport 0000:02:01.0: save config 0x08: 0x06040001
>> pcieport 0000:02:01.0: save config 0x0c: 0x00010000
>> pcieport 0000:02:01.0: save config 0x10: 0x00000000
>> pcieport 0000:02:01.0: save config 0x14: 0x00000000
>> pcieport 0000:02:01.0: save config 0x18: 0x00030302
>> pcieport 0000:02:01.0: save config 0x1c: 0x000001f1
>> pcieport 0000:02:01.0: save config 0x20: 0x18101810
>> pcieport 0000:02:01.0: save config 0x24: 0x0001fff1
>> pcieport 0000:02:01.0: save config 0x28: 0x00000000
>> pcieport 0000:02:01.0: save config 0x2c: 0x00000000
>> pcieport 0000:02:01.0: save config 0x30: 0x00000000
>> pcieport 0000:02:01.0: save config 0x34: 0x00000040
>> pcieport 0000:02:01.0: save config 0x38: 0x00000000
>> pcieport 0000:02:01.0: save config 0x3c: 0x00020000
>> pcieport 0000:02:01.0: vgaarb: pci_notify
>> pci 0000:02:02.0: save config 0x00: 0xb40412d8
>> pci 0000:02:02.0: save config 0x04: 0x00100000
>> pci 0000:02:02.0: save config 0x08: 0x06040001
>> pci 0000:02:02.0: save config 0x0c: 0x00010000
>> pci 0000:02:02.0: save config 0x10: 0x00000000
>> pci 0000:02:02.0: save config 0x14: 0x00000000
>> pci 0000:02:02.0: save config 0x18: 0x00040402
>> pci 0000:02:02.0: save config 0x1c: 0x000001f1
>> pci 0000:02:02.0: save config 0x20: 0x0000fff0
>> pci 0000:02:02.0: save config 0x24: 0x0001fff1
>> pci 0000:02:02.0: save config 0x28: 0x00000000
>> pci 0000:02:02.0: save config 0x2c: 0x00000000
>> pci 0000:02:02.0: save config 0x30: 0x00000000
>> pci 0000:02:02.0: save config 0x34: 0x00000040
>> pci 0000:02:02.0: save config 0x38: 0x00000000
>> pci 0000:02:02.0: save config 0x3c: 0x00020000
>> pcieport 0000:02:02.0: vgaarb: pci_notify
>> pcieport 0000:02:02.0: assign IRQ: got 0
>> pcieport 0000:02:02.0: enabling bus mastering
>> imx6q-pcie 33800000.pcie: msi#4 address_hi 0x0 address_lo 0x4007e000
>> imx6q-pcie 33800000.pcie: msi#5 address_hi 0x0 address_lo 0x4007e000
>> imx6q-pcie 33800000.pcie: msi#6 address_hi 0x0 address_lo 0x4007e000
>> imx6q-pcie 33800000.pcie: msi#7 address_hi 0x0 address_lo 0x4007e000
>> imx6q-pcie 33800000.pcie: msi#1 address_hi 0x0 address_lo 0x4007e000
>> pcieport 0000:02:02.0: bwctrl: enabled with IRQ 203
>> pcieport 0000:02:02.0: save config 0x00: 0xb40412d8
>> pcieport 0000:02:02.0: save config 0x04: 0x00100404
>> pcieport 0000:02:02.0: save config 0x08: 0x06040001
>> pcieport 0000:02:02.0: save config 0x0c: 0x00010000
>> pcieport 0000:02:02.0: save config 0x10: 0x00000000
>> pcieport 0000:02:02.0: save config 0x14: 0x00000000
>> pcieport 0000:02:02.0: save config 0x18: 0x00040402
>> pcieport 0000:02:02.0: save config 0x1c: 0x000001f1
>> pcieport 0000:02:02.0: save config 0x20: 0x0000fff0
>> pcieport 0000:02:02.0: save config 0x24: 0x0001fff1
>> pcieport 0000:02:02.0: save config 0x28: 0x00000000
>> pcieport 0000:02:02.0: save config 0x2c: 0x00000000
>> pcieport 0000:02:02.0: save config 0x30: 0x00000000
>> pcieport 0000:02:02.0: save config 0x34: 0x00000040
>> pcieport 0000:02:02.0: save config 0x38: 0x00000000
>> pcieport 0000:02:02.0: save config 0x3c: 0x00020000
>> pcieport 0000:02:02.0: vgaarb: pci_notify
>> pci 0000:02:03.0: save config 0x00: 0xb40412d8
>> pci 0000:02:03.0: save config 0x04: 0x00100000
>> pci 0000:02:03.0: save config 0x08: 0x06040001
>> pci 0000:02:03.0: save config 0x0c: 0x00010000
>> pci 0000:02:03.0: save config 0x10: 0x00000000
>> pci 0000:02:03.0: save config 0x14: 0x00000000
>> pci 0000:02:03.0: save config 0x18: 0x00050502
>> pci 0000:02:03.0: save config 0x1c: 0x000001f1
>> pci 0000:02:03.0: save config 0x20: 0x18201820
>> pci 0000:02:03.0: save config 0x24: 0x0001fff1
>> pci 0000:02:03.0: save config 0x28: 0x00000000
>> pci 0000:02:03.0: save config 0x2c: 0x00000000
>> pci 0000:02:03.0: save config 0x30: 0x00000000
>> pci 0000:02:03.0: save config 0x34: 0x00000040
>> pci 0000:02:03.0: save config 0x38: 0x00000000
>> pci 0000:02:03.0: save config 0x3c: 0x00020000
>> pcieport 0000:02:03.0: vgaarb: pci_notify
>> pcieport 0000:02:03.0: assign IRQ: got 0
>> pcieport 0000:02:03.0: enabling device (0000 -> 0002)
>> pcieport 0000:02:03.0: save config 0x00: 0xb40412d8
>> pcieport 0000:02:03.0: save config 0x04: 0x00100002
>> pcieport 0000:02:03.0: save config 0x08: 0x06040001
>> pcieport 0000:02:03.0: save config 0x0c: 0x00010000
>> pcieport 0000:02:03.0: save config 0x10: 0x00000000
>> pcieport 0000:02:03.0: save config 0x14: 0x00000000
>> pcieport 0000:02:03.0: save config 0x18: 0x00050502
>> pcieport 0000:02:03.0: save config 0x1c: 0x000001f1
>> pcieport 0000:02:03.0: save config 0x20: 0x18201820
>> pcieport 0000:02:03.0: save config 0x24: 0x0001fff1
>> pcieport 0000:02:03.0: save config 0x28: 0x00000000
>> pcieport 0000:02:03.0: save config 0x2c: 0x00000000
>> pcieport 0000:02:03.0: save config 0x30: 0x00000000
>> pcieport 0000:02:03.0: save config 0x34: 0x00000040
>> pcieport 0000:02:03.0: save config 0x38: 0x00000000
>> pcieport 0000:02:03.0: save config 0x3c: 0x00020000
>> pcieport 0000:02:03.0: vgaarb: pci_notify
>> pci 0000:03:00.0: save config 0x00: 0x0030168c
>> pci 0000:03:00.0: save config 0x04: 0x00100000
>> pci 0000:03:00.0: save config 0x08: 0x02800001
>> pci 0000:03:00.0: save config 0x0c: 0x00000000
>> pci 0000:03:00.0: save config 0x10: 0x18100004
>> pci 0000:03:00.0: save config 0x14: 0x00000000
>> pci 0000:03:00.0: save config 0x18: 0x00000000
>> pci 0000:03:00.0: save config 0x1c: 0x00000000
>> pci 0000:03:00.0: save config 0x20: 0x00000000
>> pci 0000:03:00.0: save config 0x24: 0x00000000
>> pci 0000:03:00.0: save config 0x28: 0x00000000
>> pci 0000:03:00.0: save config 0x2c: 0x3116168c
>> pci 0000:03:00.0: save config 0x30: 0x00000000
>> pci 0000:03:00.0: save config 0x34: 0x00000040
>> pci 0000:03:00.0: save config 0x38: 0x00000000
>> pci 0000:03:00.0: save config 0x3c: 0x000001ff
>> pci 0000:05:00.0: save config 0x00: 0x74301055
>> pci 0000:05:00.0: save config 0x04: 0x00100000
>> pci 0000:05:00.0: save config 0x08: 0x02000011
>> pci 0000:05:00.0: save config 0x0c: 0x00000000
>> pci 0000:05:00.0: save config 0x10: 0x18200004
>> pci 0000:05:00.0: save config 0x14: 0x00000000
>> pci 0000:05:00.0: save config 0x18: 0x18202004
>> pci 0000:05:00.0: save config 0x1c: 0x00000000
>> pci 0000:05:00.0: save config 0x20: 0x18202104
>> pci 0000:05:00.0: save config 0x24: 0x00000000
>> pci 0000:05:00.0: save config 0x28: 0x00000000
>> pci 0000:05:00.0: save config 0x2c: 0x74301055
>> pci 0000:05:00.0: save config 0x30: 0x00000000
>> pci 0000:05:00.0: save config 0x34: 0x00000040
>> pci 0000:05:00.0: save config 0x38: 0x00000000
>> pci 0000:05:00.0: save config 0x3c: 0x000001ff
>> VFS: Mounted root (squashfs filesystem) readonly on device 179:6.
>> devtmpfs: mounted
>> Freeing unused kernel memory: 896K
>> Run /sbin/wrap-init as init process
>>     with arguments:
>>       /sbin/wrap-init
>>     with environment:
>>       HOME=/
>>       TERM=linux
>>       rootrw=/dev/mmcblk2p8
>>       rootrwfstype=ext4
>>       persistmnt=/dev/mmcblk2p7
>>       persistmntfstype=ext4
>> pcieport 0000:02:02.0: save config 0x00: 0xb40412d8
>> pcieport 0000:02:02.0: save config 0x04: 0x00100404
>> pcieport 0000:02:02.0: save config 0x08: 0x06040001
>> pcieport 0000:02:02.0: save config 0x0c: 0x00010000
>> pcieport 0000:02:02.0: save config 0x10: 0x00000000
>> pcieport 0000:02:02.0: save config 0x14: 0x00000000
>> pcieport 0000:02:02.0: save config 0x18: 0x00040402
>> pcieport 0000:02:02.0: save config 0x1c: 0x000001f1
>> pcieport 0000:02:02.0: save config 0x20: 0x0000fff0
>> pcieport 0000:02:02.0: save config 0x24: 0x0001fff1
>> pcieport 0000:02:02.0: save config 0x28: 0x00000000
>> pcieport 0000:02:02.0: save config 0x2c: 0x00000000
>> pcieport 0000:02:02.0: save config 0x30: 0x00000000
>> pcieport 0000:02:02.0: save config 0x34: 0x00000040
>> pcieport 0000:02:02.0: save config 0x38: 0x00000000
>> pcieport 0000:02:02.0: save config 0x3c: 0x00020000
>> pcieport 0000:02:02.0: PME# enabled
>> imx-sdma 302c0000.dma-controller: loaded firmware 4.6
>> imx-sdma 302b0000.dma-controller: loaded firmware 4.6
>> imx-sdma 30bd0000.dma-controller: loaded firmware 4.6
>> usb_phy_generic usbphynop1: dummy supplies not allowed for exclusive
>> requests (id=vbus)
>> usb_phy_generic usbphynop2: dummy supplies not allowed for exclusive
>> requests (id=vbus)
>> usbcore: registered new interface driver usbfs
>> usbcore: registered new interface driver hub
>> usbcore: registered new device driver usb
>> cfg80211: Loading compiled-in X.509 certificates for regulatory database
>> Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
>> Loaded X.509 cert 'wens: 61c038651aabdcf94bd0ac7ff06c7248db18c600'
>> ci_hdrc ci_hdrc.1: EHCI Host Controller
>> ci_hdrc ci_hdrc.1: new USB bus registered, assigned bus number 1
>> ci_hdrc ci_hdrc.1: USB 2.0 started, EHCI 1.00
>> usb usb1: New USB device found, idVendor=1d6b, idProduct=0002,
>> bcdDevice= 6.19
>> usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
>> usb usb1: Product: EHCI Host Controller
>> usb usb1: Manufacturer: Linux 6.19.0-rc1 ehci_hcd
>> usb usb1: SerialNumber: ci_hdrc.1
>> hub 1-0:1.0: USB hub found
>> hub 1-0:1.0: 1 port detected
>> lan743x 0000:05:00.0: vgaarb: pci_notify
>> lan743x 0000:05:00.0: assign IRQ: got 201
>> pcieport 0000:02:03.0: enabling bus mastering
>> lan743x 0000:05:00.0: enabling device (0000 -> 0002)
>> lan743x 0000:05:00.0 (unnamed net_device) (uninitialized): PCI: Vendor
>> ID = 0x1055, Device ID = 0x7430
>> lan743x 0000:05:00.0: enabling bus mastering
>> lan743x 0000:05:00.0 (unnamed net_device) (uninitialized): ID_REV =
>> 0x74300011, FPGA_REV = 0.0
>> usb 1-1: new high-speed USB device number 2 using ci_hdrc
>> lan743x 0000:05:00.0 (unnamed net_device) (uninitialized): MAC address
>> set to 00:d0:12:23:fa:8b
>> lan743x 0000:05:00.0: vgaarb: pci_notify
>> usb 1-1: New USB device found, idVendor=0424, idProduct=2744, bcdDevice=
>> 2.21
>> usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
>> usb 1-1: Product: USB2744
>> usb 1-1: Manufacturer: Microchip Tech
>> hub 1-1:1.0: USB hub found
>> hub 1-1:1.0: 5 ports detected
>> usb 1-1.5: new high-speed USB device number 3 using ci_hdrc
>> usb 1-1.5: New USB device found, idVendor=0424, idProduct=2740,
>> bcdDevice= 2.00
>> usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
>> usb 1-1.5: Product: Hub Controller
>> usb 1-1.5: Manufacturer: Microchip Tech
>> Generic PHY 30be0000.ethernet-1:00: attached PHY driver
>> (mii_bus:phy_addr=30be0000.ethernet-1:00, irq=POLL)
>> fec 30be0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
>> Bluetooth: Core ver 2.22
>> NET: Registered PF_BLUETOOTH protocol family
>> Bluetooth: HCI device and connection manager initialized
>> Bluetooth: HCI socket layer initialized
>> Bluetooth: L2CAP socket layer initialized
>> Bluetooth: SCO socket layer initialized
>> Bluetooth: BNEP (Ethernet Emulation) ver 1.3
>> Bluetooth: BNEP filters: protocol multicast
>> Bluetooth: BNEP socket layer initialized
>> imx6q-pcie 33800000.pcie: msi#2 address_hi 0x0 address_lo 0x4007e000
>> imx6q-pcie 33800000.pcie: msi#3 address_hi 0x0 address_lo 0x4007e000
>> imx6q-pcie 33800000.pcie: msi#4 address_hi 0x0 address_lo 0x4007e000
>> imx6q-pcie 33800000.pcie: msi#5 address_hi 0x0 address_lo 0x4007e000
>> imx6q-pcie 33800000.pcie: msi#6 address_hi 0x0 address_lo 0x4007e000
>> imx6q-pcie 33800000.pcie: msi#7 address_hi 0x0 address_lo 0x4007e000
>> lan743x 0000:05:00.0 eth1: using MSIX interrupts, number of vectors = 6
>> lan743x 0000:05:00.0 eth1: PHY [pci-0000:05:00.0:01] driver [Generic
>> PHY] (irq=POLL)
>> lan743x 0000:05:00.0 eth1: configuring for phy/gmii link mode
>> lan743x 0000:05:00.0 eth1: Link is Up - 1Gbps/Full - flow control rx/tx
>> imx8m-blk-ctrl 38330000.blk-ctrl: sync_state() pending due to
>> 38310000.video-codec
>> imx8m-blk-ctrl 38330000.blk-ctrl: sync_state() pending due to
>> 38300000.video-codec
>> imx-pgc imx-pgc-domain.5: sync_state() pending due to 38008000.gpu
>> imx-pgc imx-pgc-domain.5: sync_state() pending due to 38000000.gpu
>> ath9k 0000:03:00.0: vgaarb: pci_notify
>> ath9k 0000:03:00.0: assign IRQ: got 201
>> pcieport 0000:02:01.0: enabling bus mastering
>> ath9k 0000:03:00.0: enabling device (0000 -> 0002)
>> ath9k 0000:03:00.0: enabling bus mastering
>> ath: EEPROM regdomain: 0x37
>> ath: EEPROM indicates we should expect a direct regpair map
>> ath: Country alpha2 being used: AL
>> ath: Regpair used: 0x37
>> ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
>> ieee80211 phy0: Atheros AR9300 Rev:3 mem=0x00000000ce8f30fa, irq=201
>> ath9k 0000:03:00.0: vgaarb: pci_notify
> 



^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [REGRESSION] Re: imx8 PCI regression since "iommu: Get DT/ACPI parsing into the proper probe path"
  2026-01-16 16:52   ` [REGRESSION] " Nicolas Cavallari
@ 2026-01-16 17:10     ` Jason Gunthorpe
  2026-01-16 17:35       ` Robin Murphy
  2026-01-19 12:51       ` Nicolas Cavallari
  2026-01-16 17:24     ` Robin Murphy
  1 sibling, 2 replies; 8+ messages in thread
From: Jason Gunthorpe @ 2026-01-16 17:10 UTC (permalink / raw)
  To: Nicolas Cavallari
  Cc: iommu, linux-pci, linux-arm-kernel, linux-kernel, Bjorn Helgaas,
	Rob Herring (Arm), Robin Murphy, Lorenzo Pieralisi, Joerg Roedel,
	regressions

On Fri, Jan 16, 2026 at 05:52:36PM +0100, Nicolas Cavallari wrote:
> I debugged it further, it seems to be mostly a PCI issue since the system
> does not actually have an IOMMU.
> 
> When examining changes in the PCI configuration (lspci -vvvv), the main
> difference is that, with the patch, Access Control Services are enabled on
> the PCI switch.
> 
>         Capabilities: [220 v1] Access Control Services
>                 ACSCap: SrcValid+ TransBlk+ ReqRedir+ CmpltRedir+
> UpstreamFwd+ EgressCtrl+ DirectTrans+
> -               ACSCtl: SrcValid- TransBlk- ReqRedir- CmpltRedir-
> UpstreamFwd- EgressCtrl- DirectTrans-
> +               ACSCtl: SrcValid+ TransBlk- ReqRedir+ CmpltRedir+
> UpstreamFwd+ EgressCtrl- DirectTrans-
> 
> If I manually patch the config space in sysfs and re-disable ACS on the port
> connected to the LAN7430, I cannot reproduce the problem.  In fact,
> disabling only ReqRedir is enough to work around the issue.

My guess would be your system has some kind of address alias going on?

Assuming you are not facing an errata, ACS generally changes the
routing of TLPs so if you have a DMA address that could go to two
different places then messing with ACS will give you different
behaviors.

In specific when you turn all those ACS settings you cannot do P2P
traffic anymore. If your system expects this for some reason then you
must use the kernel command line option to disable acs.

If you are just doing normal netdev stuff then it is doubtful that you
are doing P2P at all, so I might guess a bug in the microchip ethernet
driver doing a wild DMA? Stricter ACS settings cause it to AER and the
device cannot recover?

It will be hard to get the bottom of the defect without a PCI trace

I don't know why your bisection landed on bcb8 - the intention was
that pci_enable_acs() is always called, and I didn't notice an obvious
reason why that wouldn't happen prior to bcb8.. It is called directly
from pci_device_add() Maybe investigating that angle would be
informative..

> I also read up on AER and I'm surprised that I don't see anything in dmesg
> when the problem occurs, even through UERcvd+ start appearing on the root
> context and AdvNonFatalErr+ appears on the switch.

Though UE and AdvNonFatalErr sure are weird indications for an
addressing error.. Is there some kind of special embedded system thing
going on? Vendor messages over PCI perhaps?

Jason

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [REGRESSION] Re: imx8 PCI regression since "iommu: Get DT/ACPI parsing into the proper probe path"
  2026-01-16 16:52   ` [REGRESSION] " Nicolas Cavallari
  2026-01-16 17:10     ` Jason Gunthorpe
@ 2026-01-16 17:24     ` Robin Murphy
  2026-01-19 12:53       ` Nicolas Cavallari
  1 sibling, 1 reply; 8+ messages in thread
From: Robin Murphy @ 2026-01-16 17:24 UTC (permalink / raw)
  To: Nicolas Cavallari, iommu, linux-pci, linux-arm-kernel,
	linux-kernel
  Cc: Bjorn Helgaas, Rob Herring (Arm), Lorenzo Pieralisi,
	Jason Gunthorpe, Joerg Roedel, regressions

On 2026-01-16 4:52 pm, Nicolas Cavallari wrote:
> +cc regressions ML
> 
> Le 13/01/2026 à 10:17, Nicolas Cavallari a écrit :
>> +cc patch author & reviewers
>>
>> On 1/9/26 17:22, Nicolas Cavallari wrote:
>>> When upgrading from 6.12 to a 6.18 kernel, I noticed that a PCI
>>> Ethernet adapter (Microchip LAN7430) would hang under load and not
>>> recover.  When that happens, some of its registers indicate it is
>>> failing to do DMA reads, so cannot reclaim entries on its ring buffer.
>>>
>>> I bisected the problem into this commit:
>>>
>>> commit bcb81ac6ae3c2ef95b44e7b54c3c9522364a245c
>>> Author: Robin Murphy <robin.murphy@arm.com>
>>> Date:   Fri Feb 28 15:46:33 2025 +0000
>>>
>>>       iommu: Get DT/ACPI parsing into the proper probe path
>>>
>>> The problem still exists on 6.19-rc1, on pci/next (29a77b4897f1) and on
>>> iommu/master (360e85353769) trees.  Reverting the commit fixes the 
>>> issue.
> 
> The problem persists on 6.19-rc5
> 
>>> The system is a Gateworks GW7200, which is a i.MX 8 Mini connected to a
>>> Pericom
>>> PI7C9X2G404 4-port switch connected to the LAN7430 chip.
>>>
>>> -[0000:00]---00.0-[01-ff]----00.0-[02-05]--+-01.0-[03]----00.0
>>>                                              +-02.0-[04]--
>>>                                              \-03.0-[05]----00.0
>>>
>>> The problem only occurs when there is at least another PCI device in use
>>> on the
>>> switch.  It does not happen if the LAN7430 is the only PCI device, or if
>>> the
>>> other devices are not actively used.  For example i can reproduce it
>>> with an
>>> ath9k wireless network adapter when it is up and running, but not when
>>> it is
>>> down or its driver is not loaded.
>>>
>>> I suspect that other PCI devices have similar issues, but the LAN7430 is
>>> the
>>> easiest one to diagnose, as it hangs within seconds with an iperf3 --
>>> bidir -u
>>> -b 200M and its register map are public.
>>>
>>> I couldn't find an way to dump the PCI address translation mapping from
>>> userspace.
>>> I would be happy to provide more information or test patches.
> 
> I debugged it further, it seems to be mostly a PCI issue since the 
> system does not actually have an IOMMU.

Indeed, I was figuring this had to be another case of a switch with 
wonky ACS - do Mani's patches adjusting ACS enablement make any difference?

https://lore.kernel.org/all/20260102-pci_acs-v3-1-72280b94d288@oss.qualcomm.com/

Although in this case I guess the issue is arguably more that we're 
requesting ACS at all, before we know that there's actually an IOMMU 
present to warrant it. Clearly the best option would be to figure out if 
the switch behaviour itself can be fixed somehow, but perhaps something 
like this might help paper over the issue for now (but I'd have to test 
it to make sure it doesn't break IOMMUs again...)

----->8-----
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 6b989a62def2..837cc0b5ace4 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -141,10 +141,12 @@ int of_iommu_configure(struct device *dev, struct 
device_node *master_np,
  			.np = master_np,
  		};

-		pci_request_acs();
  		err = pci_for_each_dma_alias(to_pci_dev(dev),
  					     of_pci_iommu_init, &info);
-		of_pci_check_device_ats(dev, master_np);
+		if (!err) {
+			pci_request_acs();
+			of_pci_check_device_ats(dev, master_np);
+		}
  	} else {
  		err = of_iommu_configure_device(master_np, dev, id);
  	}
-----8<-----

Thanks,
Robin.


^ permalink raw reply related	[flat|nested] 8+ messages in thread

* Re: [REGRESSION] Re: imx8 PCI regression since "iommu: Get DT/ACPI parsing into the proper probe path"
  2026-01-16 17:10     ` Jason Gunthorpe
@ 2026-01-16 17:35       ` Robin Murphy
  2026-01-19 12:51       ` Nicolas Cavallari
  1 sibling, 0 replies; 8+ messages in thread
From: Robin Murphy @ 2026-01-16 17:35 UTC (permalink / raw)
  To: Jason Gunthorpe, Nicolas Cavallari
  Cc: iommu, linux-pci, linux-arm-kernel, linux-kernel, Bjorn Helgaas,
	Rob Herring (Arm), Lorenzo Pieralisi, Joerg Roedel, regressions

On 2026-01-16 5:10 pm, Jason Gunthorpe wrote:
> On Fri, Jan 16, 2026 at 05:52:36PM +0100, Nicolas Cavallari wrote:
>> I debugged it further, it seems to be mostly a PCI issue since the system
>> does not actually have an IOMMU.
>>
>> When examining changes in the PCI configuration (lspci -vvvv), the main
>> difference is that, with the patch, Access Control Services are enabled on
>> the PCI switch.
>>
>>          Capabilities: [220 v1] Access Control Services
>>                  ACSCap: SrcValid+ TransBlk+ ReqRedir+ CmpltRedir+
>> UpstreamFwd+ EgressCtrl+ DirectTrans+
>> -               ACSCtl: SrcValid- TransBlk- ReqRedir- CmpltRedir-
>> UpstreamFwd- EgressCtrl- DirectTrans-
>> +               ACSCtl: SrcValid+ TransBlk- ReqRedir+ CmpltRedir+
>> UpstreamFwd+ EgressCtrl- DirectTrans-
>>
>> If I manually patch the config space in sysfs and re-disable ACS on the port
>> connected to the LAN7430, I cannot reproduce the problem.  In fact,
>> disabling only ReqRedir is enough to work around the issue.
> 
> My guess would be your system has some kind of address alias going on?
> 
> Assuming you are not facing an errata, ACS generally changes the
> routing of TLPs so if you have a DMA address that could go to two
> different places then messing with ACS will give you different
> behaviors.
> 
> In specific when you turn all those ACS settings you cannot do P2P
> traffic anymore. If your system expects this for some reason then you
> must use the kernel command line option to disable acs.
> 
> If you are just doing normal netdev stuff then it is doubtful that you
> are doing P2P at all, so I might guess a bug in the microchip ethernet
> driver doing a wild DMA? Stricter ACS settings cause it to AER and the
> device cannot recover?
> 
> It will be hard to get the bottom of the defect without a PCI trace
> 
> I don't know why your bisection landed on bcb8 - the intention was
> that pci_enable_acs() is always called, and I didn't notice an obvious
> reason why that wouldn't happen prior to bcb8.. It is called directly
> from pci_device_add() Maybe investigating that angle would be
> informative..

The difference is that bcb8 moves the pci_request_acs() call on OF 
systems back early enough to actually have an effect - that's spent the 
last 6 years being pretty much a no-op since 6bf6c24720d3 ("iommu/of: 
Request ACS from the PCI core when configuring IOMMU linkage")...

Thanks,
Robin.

>> I also read up on AER and I'm surprised that I don't see anything in dmesg
>> when the problem occurs, even through UERcvd+ start appearing on the root
>> context and AdvNonFatalErr+ appears on the switch.
> 
> Though UE and AdvNonFatalErr sure are weird indications for an
> addressing error.. Is there some kind of special embedded system thing
> going on? Vendor messages over PCI perhaps?
> 
> Jason



^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [REGRESSION] Re: imx8 PCI regression since "iommu: Get DT/ACPI parsing into the proper probe path"
  2026-01-16 17:10     ` Jason Gunthorpe
  2026-01-16 17:35       ` Robin Murphy
@ 2026-01-19 12:51       ` Nicolas Cavallari
  1 sibling, 0 replies; 8+ messages in thread
From: Nicolas Cavallari @ 2026-01-19 12:51 UTC (permalink / raw)
  To: Jason Gunthorpe
  Cc: iommu, linux-pci, linux-arm-kernel, linux-kernel, Bjorn Helgaas,
	Rob Herring (Arm), Robin Murphy, Lorenzo Pieralisi, Joerg Roedel,
	regressions

Le 16/01/2026 à 18:10, Jason Gunthorpe a écrit :
> On Fri, Jan 16, 2026 at 05:52:36PM +0100, Nicolas Cavallari wrote:
>> I debugged it further, it seems to be mostly a PCI issue since the system
>> does not actually have an IOMMU.
>>
>> When examining changes in the PCI configuration (lspci -vvvv), the main
>> difference is that, with the patch, Access Control Services are enabled on
>> the PCI switch.
>>
>>          Capabilities: [220 v1] Access Control Services
>>                  ACSCap: SrcValid+ TransBlk+ ReqRedir+ CmpltRedir+
>> UpstreamFwd+ EgressCtrl+ DirectTrans+
>> -               ACSCtl: SrcValid- TransBlk- ReqRedir- CmpltRedir-
>> UpstreamFwd- EgressCtrl- DirectTrans-
>> +               ACSCtl: SrcValid+ TransBlk- ReqRedir+ CmpltRedir+
>> UpstreamFwd+ EgressCtrl- DirectTrans-
>>
>> If I manually patch the config space in sysfs and re-disable ACS on the port
>> connected to the LAN7430, I cannot reproduce the problem.  In fact,
>> disabling only ReqRedir is enough to work around the issue.
> 
> My guess would be your system has some kind of address alias going on?
> 
> Assuming you are not facing an errata, ACS generally changes the
> routing of TLPs so if you have a DMA address that could go to two
> different places then messing with ACS will give you different
> behaviors.
> 
> In specific when you turn all those ACS settings you cannot do P2P
> traffic anymore. If your system expects this for some reason then you
> must use the kernel command line option to disable acs.
> 
> If you are just doing normal netdev stuff then it is doubtful that you
> are doing P2P at all, so I might guess a bug in the microchip ethernet
> driver doing a wild DMA? Stricter ACS settings cause it to AER and the
> device cannot recover?

Yes, i'm just running network throughput tests (iperf3) on eth1 while wlan0 is 
idling, and those are the only two peripheral on the PCI bus. I don't think 
there are anything unusual going on (P2P or vendor commands).

Bit it turns out there is an errata for the Pericom PI7C9X2G404 switch that 
matches my problem, and there is already a workaround in the kernel, but it does 
not match my PCI ids:

   DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0x2404,
                            pci_fixup_pericom_acs_store_forward);
   DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0x2404,
                            pci_fixup_pericom_acs_store_forward);
   DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0x2304,
                            pci_fixup_pericom_acs_store_forward);
   DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0x2304,
                            pci_fixup_pericom_acs_store_forward);
   DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0x2303,
                            pci_fixup_pericom_acs_store_forward);
   DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0x2303,
                            pci_fixup_pericom_acs_store_forward);

While my device is 12d8:b404 and lspci still identifies it as PI7C9X2G404:

01:00.0 PCI bridge [0604]: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 
4-Port/4-Lane Packet Switch [12d8:b404] (rev 01) (prog-if 00 [Normal decode])

Adding this ID to the quirks.c list fixes the issue. I'll send a patch.


^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [REGRESSION] Re: imx8 PCI regression since "iommu: Get DT/ACPI parsing into the proper probe path"
  2026-01-16 17:24     ` Robin Murphy
@ 2026-01-19 12:53       ` Nicolas Cavallari
  0 siblings, 0 replies; 8+ messages in thread
From: Nicolas Cavallari @ 2026-01-19 12:53 UTC (permalink / raw)
  To: Robin Murphy, iommu, linux-pci, linux-arm-kernel, linux-kernel
  Cc: Bjorn Helgaas, Rob Herring (Arm), Lorenzo Pieralisi,
	Jason Gunthorpe, regressions

Le 16/01/2026 à 18:24, Robin Murphy a écrit :
> On 2026-01-16 4:52 pm, Nicolas Cavallari wrote:
>> +cc regressions ML
>>
>> Le 13/01/2026 à 10:17, Nicolas Cavallari a écrit :
>>> +cc patch author & reviewers
>>>
>>> On 1/9/26 17:22, Nicolas Cavallari wrote:
>>>> When upgrading from 6.12 to a 6.18 kernel, I noticed that a PCI
>>>> Ethernet adapter (Microchip LAN7430) would hang under load and not
>>>> recover.  When that happens, some of its registers indicate it is
>>>> failing to do DMA reads, so cannot reclaim entries on its ring buffer.
>>>>
>>>> I bisected the problem into this commit:
>>>>
>>>> commit bcb81ac6ae3c2ef95b44e7b54c3c9522364a245c
>>>> Author: Robin Murphy <robin.murphy@arm.com>
>>>> Date:   Fri Feb 28 15:46:33 2025 +0000
>>>>
>>>>        iommu: Get DT/ACPI parsing into the proper probe path
>>>>
>>>> The problem still exists on 6.19-rc1, on pci/next (29a77b4897f1) and on
>>>> iommu/master (360e85353769) trees.  Reverting the commit fixes the
>>>> issue.
>>
>> The problem persists on 6.19-rc5
>>
>>>> The system is a Gateworks GW7200, which is a i.MX 8 Mini connected to a
>>>> Pericom
>>>> PI7C9X2G404 4-port switch connected to the LAN7430 chip.
>>>>
>>>> -[0000:00]---00.0-[01-ff]----00.0-[02-05]--+-01.0-[03]----00.0
>>>>                                               +-02.0-[04]--
>>>>                                               \-03.0-[05]----00.0
>>>>
>>>> The problem only occurs when there is at least another PCI device in use
>>>> on the
>>>> switch.  It does not happen if the LAN7430 is the only PCI device, or if
>>>> the
>>>> other devices are not actively used.  For example i can reproduce it
>>>> with an
>>>> ath9k wireless network adapter when it is up and running, but not when
>>>> it is
>>>> down or its driver is not loaded.
>>>>
>>>> I suspect that other PCI devices have similar issues, but the LAN7430 is
>>>> the
>>>> easiest one to diagnose, as it hangs within seconds with an iperf3 --
>>>> bidir -u
>>>> -b 200M and its register map are public.
>>>>
>>>> I couldn't find an way to dump the PCI address translation mapping from
>>>> userspace.
>>>> I would be happy to provide more information or test patches.
>>
>> I debugged it further, it seems to be mostly a PCI issue since the
>> system does not actually have an IOMMU.
> 
> Indeed, I was figuring this had to be another case of a switch with
> wonky ACS - do Mani's patches adjusting ACS enablement make any difference?
> 
> https://lore.kernel.org/all/20260102-pci_acs-v3-1-72280b94d288@oss.qualcomm.com/

With this series, ACS is still enabled and eth1 is still failing under load.

> Although in this case I guess the issue is arguably more that we're
> requesting ACS at all, before we know that there's actually an IOMMU
> present to warrant it. Clearly the best option would be to figure out if
> the switch behaviour itself can be fixed somehow, but perhaps something
> like this might help paper over the issue for now (but I'd have to test
> it to make sure it doesn't break IOMMUs again...)
> 
> ----->8-----
> diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
> index 6b989a62def2..837cc0b5ace4 100644
> --- a/drivers/iommu/of_iommu.c
> +++ b/drivers/iommu/of_iommu.c
> @@ -141,10 +141,12 @@ int of_iommu_configure(struct device *dev, struct
> device_node *master_np,
>    			.np = master_np,
>    		};
> 
> -		pci_request_acs();
>    		err = pci_for_each_dma_alias(to_pci_dev(dev),
>    					     of_pci_iommu_init, &info);
> -		of_pci_check_device_ats(dev, master_np);
> +		if (!err) {
> +			pci_request_acs();
> +			of_pci_check_device_ats(dev, master_np);
> +		}
>    	} else {
>    		err = of_iommu_configure_device(master_np, dev, id);
>    	}
> -----8<-----

With this, ACS is indeed disabled and eth1 no longer fails under load, but I 
have also identified an errata on the PCIe switch that causes ACS to fail. I've 
sent another message in this thread.


^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2026-01-19 12:53 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-01-09 16:22 imx8 PCI regression since "iommu: Get DT/ACPI parsing into the proper probe path" Nicolas Cavallari
2026-01-13  9:17 ` Nicolas Cavallari
2026-01-16 16:52   ` [REGRESSION] " Nicolas Cavallari
2026-01-16 17:10     ` Jason Gunthorpe
2026-01-16 17:35       ` Robin Murphy
2026-01-19 12:51       ` Nicolas Cavallari
2026-01-16 17:24     ` Robin Murphy
2026-01-19 12:53       ` Nicolas Cavallari

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