Function i40e_init_arq

dpdk/drivers/net/i40e/base/i40e_adminq.c:438–486

* i40e_init_arq - initialize ARQ * @hw: pointer to the hardware structure * * The main initialization routine for the Admin Receive (Event) Queue. * Prior to calling this function, drivers *MUST* set the following fields * in the hw->aq structure: * - hw->aq.num_asq_entries * - hw->aq.arq_buf_size * * Do *NOT* hold the lock when calling this as the memory allocation routines

 *  called are not going to be atomic context safe
 **/
enum i40e_status_code i40e_init_arq(struct i40e_hw *hw)
{
	enum i40e_status_code ret_code = I40E_SUCCESS;

	if (hw->aq.arq.count > 0) {
		/* queue already initialized */
		ret_code = I40E_ERR_NOT_READY;
		goto init_adminq_exit;
	}

	/* verify input for valid configuration */
	if ((hw->aq.num_arq_entries == 0) ||
	    (hw->aq.arq_buf_size == 0)) {
		ret_code = I40E_ERR_CONFIG;
		goto init_adminq_exit;
	}

	hw->aq.arq.next_to_use = 0;
	hw->aq.arq.next_to_clean = 0;

	/* allocate the ring memory */
	ret_code = i40e_alloc_adminq_arq_ring(hw);
	if (ret_code != I40E_SUCCESS)
		goto init_adminq_exit;

	/* allocate buffers in the rings */
	ret_code = i40e_alloc_arq_bufs(hw);
	if (ret_code != I40E_SUCCESS)
		goto init_adminq_free_rings;

	/* initialize base registers */
	ret_code = i40e_config_arq_regs(hw);
	if (ret_code != I40E_SUCCESS)
		goto init_config_regs;

	/* success! */
	hw->aq.arq.count = hw->aq.num_arq_entries;
	goto init_adminq_exit;

init_adminq_free_rings:
	i40e_free_adminq_arq(hw);
	return ret_code;

init_config_regs:
	i40e_free_arq_bufs(hw);

init_adminq_exit:
	return ret_code;
}

/**
 *  i40e_shutdown_asq - shutdown the ASQ