calc_index
calc_index(offset, DSPSURF(display, PIPE_A), DSPSURF(display, PIPE_B), DSPSURF(display, PIPE_C))
calc_index(offset, SPRSURF(PIPE_A), SPRSURF(PIPE_B), SPRSURF(PIPE_C))
calc_index(offset, FDI_RX_CTL(PIPE_A), FDI_RX_CTL(PIPE_B), FDI_RX_CTL(PIPE_C))
calc_index(offset, FDI_TX_CTL(PIPE_A), FDI_TX_CTL(PIPE_B), FDI_TX_CTL(PIPE_C))
calc_index(offset, FDI_RX_IMR(PIPE_A), FDI_RX_IMR(PIPE_B), FDI_RX_IMR(PIPE_C))
calc_index(offset, DP_TP_CTL(PORT_A), DP_TP_CTL(PORT_B), DP_TP_CTL(PORT_E))
idx = calc_index(expires, 0, bucket_expiry);
idx = calc_index(expires, 1, bucket_expiry);
idx = calc_index(expires, 2, bucket_expiry);
idx = calc_index(expires, 3, bucket_expiry);
idx = calc_index(expires, 4, bucket_expiry);
idx = calc_index(expires, 5, bucket_expiry);
idx = calc_index(expires, 6, bucket_expiry);
idx = calc_index(expires, 7, bucket_expiry);
idx = calc_index(expires, LVL_DEPTH - 1, bucket_expiry);