Function txgbe_write_mbx_pf

dpdk/drivers/net/txgbe/base/txgbe_mbx.c:566–592

* txgbe_write_mbx_pf - Places a message in the mailbox * @hw: pointer to the HW structure * @msg: The message buffer * @size: Length of buffer * @vf_number: the VF index * * returns 0 if it successfully copied message into the buffer **/

 *  returns 0 if it successfully copied message into the buffer
 **/
s32 txgbe_write_mbx_pf(struct txgbe_hw *hw, u32 *msg, u16 size, u16 vf_number)
{
	s32 ret_val;
	u16 i;

	/* lock the mailbox to prevent pf/vf race condition */
	ret_val = txgbe_obtain_mbx_lock_pf(hw, vf_number);
	if (ret_val)
		goto out_no_write;

	/* flush msg and acks as we are overwriting the message buffer */
	txgbe_check_for_msg_pf(hw, vf_number);
	txgbe_check_for_ack_pf(hw, vf_number);

	/* copy the caller specified message to the mailbox memory buffer */
	for (i = 0; i < size; i++)
		wr32a(hw, TXGBE_MBMEM(vf_number), i, msg[i]);

	/* Interrupt VF to tell it a message has been sent and release buffer*/
	wr32(hw, TXGBE_MBCTL(vf_number), TXGBE_MBCTL_STS);

	/* update stats */
	hw->mbx.stats.msgs_tx++;

out_no_write:
	return ret_val;
}

/**
 *  txgbe_read_mbx_pf - Read a message from the mailbox