0 Replies Latest reply on Feb 29, 2012 5:27 AM by gknittel

    82599 EICR bits




      I'm trying to understand the 82599 chip, and I'd have a question concerning interrupts.

      The data sheet (Revision: 2.74) marks bit 31 in EICR as "reserved", but the Linux driver

      source defines it as

      #define IXGBE_EICR_OTHER        0x80000000 /* Interrupt Cause Active */

      I saw in the interrupt service routine that sometimes this bit is set when an interrupt

      occurs, and sometimes it is reset. This applies to the same cause, for example

      link status change (LSC).

      Can somebody explain the meaning of this bit?