On 9/23/2020 10:04 PM, Kuppuswamy, Sathyanarayanan wrote: >> AFAIK, DLLSC is a requirement not optional. Why is this not supported by >> non-hotplug ports? > Its required for hotplug capable ports. Please check PCIe spec v5.0 sec > 6.7.3.3. > > The Data Link Layer State Changed event provides an indication that the > state of > the Data Link Layer Link Active bit in the Link Status Register has > changed. > Support for Data Link Layer State Changed events and software > notification of these > events are required for hot-plug capable Downstream Ports. I see. Can I assume that your system supports DPC? DPC is supposed to recover the link via dpc_reset_link().
