Patent ID: 7315911
Filing Date: 2008-01-01
Classification: G06F

Abstract:
1. A method for a first redundant array of inexpensive disks (RAID) controller to transfer data to a second RAID controller over a PCI-Express link via a PCI-Express memory write request transaction layer packet (TLP) and to also communicate an interrupt request to a processor of the second RAID controller via the address field of the header of the TLP, the method comprising: receiving the memory write request TLP, by a PCI-Express controller of the second RAID controller, from the first RAID controller via the PCI-Express link; interpreting, by the PCI-Express controller, a predetermined address bit of the address field of the TLP header as an interrupt request flag rather than as an address bit; determining, by the PCI-Express controller, whether the interrupt request flag is a predetermined value; and interrupting the processor, by the PCI-Express controller, if the interrupt request flag is the predetermined value.