On Tue, Dec 12, 2023 at 04:04:41PM +0530, Ashutosh Sharma wrote: > Removed one NVMe drive (pci address 0000:83:00.0), it got unbound > successfully from "vfio-pci" driver but saw below error in the syslog. > > can't change power state from D0 to D3hot (config space inaccessible) This is normal, the drive's config space is inaccessible after removal. > Then after 2:30 min approx, re-inserted the same drive to the same PCI > slot. But the drive was not detected. > > Dec 11 23:54:39 node-4 kernel: [183672.630191] pcieport 0000:80:03.2: > pciehp: Slot(14): Attention button pressed > Dec 11 23:54:39 node-4 kernel: [183672.630195] pcieport 0000:80:03.2: > pciehp: Slot(14) Powering on due to button press > Dec 11 23:54:44 node-4 kernel: [183677.671931] pcieport 0000:80:03.2: > pciehp: Slot(14): Card present > Dec 11 23:54:46 node-4 kernel: [183679.783922] pcieport 0000:80:03.2: > pciehp: Slot(14): No link The link doesn't come up, so the kernel gives up on the slot. I don't know what the reason is, could be a hardware issue or protocol incompatibility. This doesn't look like a kernel issue. > | +-03.0 Advanced Micro Devices, Inc. [AMD] > Starship/Matisse PCIe Dummy Host Bridge > | +-03.1-[82]----00.0 Samsung Electronics Co Ltd NVMe SSD > Controller PM9A1/PM9A3/980PRO > | +-03.2-[83]-- Adding Mario, Smita, Yazen from AMD to cc, maybe they have an idea what the issue is or how to get diagnostics on this Epyc platform. Start of thread: https://lore.kernel.org/linux-pci/CADOvten7jG7KjW6W1MRd7i8_E18L0xCCaCzmZOY_vvgJhdfOSw@xxxxxxxxxxxxxx/ > admin@node-4:/sys/bus/pci/slots/14$ sudo echo 1 > power > echo: write error: Operation not permitted This doesn't work, try "echo 1 | sudo tee power" instead. > lspci output of the pci port: > 80:03.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] > Starship/Matisse GPP Bridge (prog-if 00 [Normal decode]) [...] > LnkSta: Speed 16GT/s (ok), Width x4 (ok) > TrErr- Train- SlotClk+ DLActive+ BWMgmt+ ABWMgmt- This is from a "Link up" situation (DLActive+), it would be more interesting to get lspci output of the port in a "No link" situation. Thanks, Lukas
