Hi,
I have tested the pcie endpoint successfully a few hours ago, but suddenly , it began to show 0xFFFFFFFF in root port system shared RAM.
Is there anything I missed?
(root port system is agx orin)
p@p-desktop:~$ sudo busybox devmem 0x2b28000000
0xFFFFFFFF
lspci -v
root@p-desktop:/home/p# lspci -v
0001:00:00.0 PCI bridge: NVIDIA Corporation Device 229e (rev a1) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 51
Bus: primary=00, secondary=01, subordinate=ff, sec-latency=0
I/O behind bridge: 00001000-00001fff [size=4K]
Memory behind bridge: 40000000-400fffff [size=1M]
Prefetchable memory behind bridge: [disabled]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Root Port (Slot-), MSI 00
Capabilities: [b0] MSI-X: Enable- Count=1 Masked-
Capabilities: [100] Advanced Error Reporting
Capabilities: [148] Secondary PCI Express
Capabilities: [158] Physical Layer 16.0 GT/s <?>
Capabilities: [17c] Lane Margining at the Receiver <?>
Capabilities: [190] L1 PM Substates
Capabilities: [1a0] Vendor Specific Information: ID=0002 Rev=4 Len=100 <?>
Capabilities: [2a0] Vendor Specific Information: ID=0001 Rev=1 Len=038 <?>
Capabilities: [2d8] Data Link Feature <?>
Capabilities: [2e4] Precision Time Measurement
Capabilities: [2f0] Vendor Specific Information: ID=0004 Rev=1 Len=054 <?>
Capabilities: [358] Vendor Specific Information: ID=0006 Rev=0 Len=018 <?>
Kernel driver in use: pcieport
0001:01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8822CE 802.11ac PCIe Wireless Network Adapter
Subsystem: AzureWave RTL8822CE 802.11ac PCIe Wireless Network Adapter
Flags: bus master, fast devsel, latency 0, IRQ 310
I/O ports at 1000 [size=256]
Memory at 20a8000000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [148] Device Serial Number 00-e0-4c-ff-fe-c8-22-01
Capabilities: [158] Latency Tolerance Reporting
Capabilities: [160] L1 PM Substates
Kernel driver in use: rtl88x2ce
Kernel modules: rtl8822ce
0005:00:00.0 PCI bridge: NVIDIA Corporation Device 229a (rev a1) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 55
Bus: primary=00, secondary=01, subordinate=ff, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: 40000000-400fffff [size=1M]
Prefetchable memory behind bridge: 0000002740000000-00000027400fffff [size=1M]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
Capabilities: [70] Express Root Port (Slot-), MSI 00
Capabilities: [b0] MSI-X: Enable- Count=8 Masked-
Capabilities: [100] Advanced Error Reporting
Capabilities: [148] Secondary PCI Express
Capabilities: [168] Physical Layer 16.0 GT/s <?>
Capabilities: [190] Lane Margining at the Receiver <?>
Capabilities: [1c0] L1 PM Substates
Capabilities: [1d0] Vendor Specific Information: ID=0002 Rev=4 Len=100 <?>
Capabilities: [2d0] Vendor Specific Information: ID=0001 Rev=1 Len=038 <?>
Capabilities: [308] Data Link Feature <?>
Capabilities: [314] Precision Time Measurement
Capabilities: [320] Vendor Specific Information: ID=0004 Rev=1 Len=054 <?>
Capabilities: [388] Vendor Specific Information: ID=0006 Rev=0 Len=018 <?>
Kernel driver in use: pcieport
0005:01:00.0 RAM memory: NVIDIA Corporation Device 0001
Flags: fast devsel, IRQ 255
Memory at 2b28000000 (32-bit, non-prefetchable) [disabled] [size=64K]
Memory at 2740000000 (64-bit, prefetchable) [disabled] [size=128K]
Memory at 2b28010000 (64-bit, non-prefetchable) [disabled] [size=4K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
Capabilities: [70] Express Endpoint, MSI 00
Capabilities: [b0] MSI-X: Enable- Count=8 Masked-
Capabilities: [100] Advanced Error Reporting
Capabilities: [148] Secondary PCI Express
Capabilities: [168] Physical Layer 16.0 GT/s <?>
Capabilities: [190] Lane Margining at the Receiver <?>
Capabilities: [1b8] Latency Tolerance Reporting
Capabilities: [1c0] L1 PM Substates
Capabilities: [1d0] Vendor Specific Information: ID=0002 Rev=4 Len=100 <?>
Capabilities: [2d0] Vendor Specific Information: ID=0001 Rev=1 Len=038 <?>
Capabilities: [308] Data Link Feature <?>
Capabilities: [314] Precision Time Measurement
Capabilities: [320] Vendor Specific Information: ID=0003 Rev=1 Len=054 <?>
Capabilities: [388] Vendor Specific Information: ID=0006 Rev=0 Len=018 <?>
root@p-desktop:/home/p#
any advice would be greatly appreciated
Thx
Yen