tree 0d612a1b3a09f03103eb33a012dbb3264137e170
parent 7b1fc2ea8a5fbf9487d83865456cff77d0249ea9
author Andiry Xu <andiry.xu@amd.com> 1304590442 +0800
committer Sarah Sharp <sarah.a.sharp@linux.intel.com> 1304958887 -0700

xHCI 1.0: Block Interrupts for Isoch transfer

Currently an isoc URB is divided into multiple TDs, and every TD will
trigger an interrupt when it's processed. However, software can schedule
multiple TDs at a time, and it only needs an interrupt every URB.

xHCI 1.0 introduces the Block Event Interrupt(BEI) flag which allows Normal
and Isoch Transfer TRBs to place an Event TRB on an Event Ring but not
assert an intrrupt to the host, and the interrupt rate is significantly
reduced and the system performance is improved.

Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>