Function mc_send_command

dpdk/drivers/bus/fslmc/mc/mc_sys.c:55–93

}

int mc_send_command(struct fsl_mc_io *mc_io, struct mc_command *cmd)
{
	enum mc_cmd_status status;
	uint64_t response, start_time, total_time, time_to_wait;

	if (!mc_io || !mc_io->regs)
		return -EACCES;

	/* --- Call lock function here in case portal is shared --- */
	rte_spinlock_lock(&mc_portal_lock);

	mc_write_command(mc_io->regs, cmd);

	/* Wait for one second. rte_get_timer_hz() returns frequency of CPU */
	time_to_wait = rte_get_timer_hz();
	total_time = 0;
	start_time = rte_get_timer_cycles();

	/* Spin until status changes */
	do {
		response = ioread64(mc_io->regs);
		status = mc_cmd_read_status((struct mc_command *)&response);
		total_time = rte_get_timer_cycles() - start_time;
	} while (status == MC_CMD_STATUS_READY && total_time <= time_to_wait);

	if (status == MC_CMD_STATUS_READY) {
		rte_spinlock_unlock(&mc_portal_lock);

		return mc_status_to_error(MC_CMD_STATUS_TIMEOUT);
	}

	/* Read the response back into the command buffer */
	mc_read_response(mc_io->regs, cmd);

	/* --- Call unlock function here in case portal is shared --- */
	rte_spinlock_unlock(&mc_portal_lock);

	return mc_status_to_error(status);
}