mcp_irq_data
struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
struct mcp_irq_data *stats = ss->fw_stats;
struct mcp_irq_data *fw_stats;
cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
bus += offsetof(struct mcp_irq_data, send_done_count);