BNX2_PORT_FEATURE
val = bnx2_shmem_rd(bp, BNX2_PORT_FEATURE);
bnx2_shmem_wr(bp, BNX2_PORT_FEATURE,
bnx2_shmem_wr(bp, BNX2_PORT_FEATURE, val);
reg = bnx2_shmem_rd(bp, BNX2_PORT_FEATURE);