Function ngbe_rcv_msg_from_vf

dpdk/drivers/net/ngbe/ngbe_pf.c:621–728

}

static int
ngbe_rcv_msg_from_vf(struct rte_eth_dev *eth_dev, uint16_t vf)
{
	uint16_t mbx_size = NGBE_P2VMBX_SIZE;
	uint16_t msg_size = NGBE_VF_MSG_SIZE_DEFAULT;
	uint32_t msgbuf[NGBE_P2VMBX_SIZE];
	int32_t retval;
	struct ngbe_hw *hw = ngbe_dev_hw(eth_dev);
	struct ngbe_vf_info *vfinfo = *NGBE_DEV_VFDATA(eth_dev);
	struct ngbe_mb_event_param ret_param;

	retval = ngbe_read_mbx(hw, msgbuf, mbx_size, vf);
	if (retval) {
		PMD_DRV_LOG(ERR, "Error mbx recv msg from VF %d", vf);
		return retval;
	}

	/* do nothing with the message already been processed */
	if (msgbuf[0] & (NGBE_VT_MSGTYPE_ACK | NGBE_VT_MSGTYPE_NACK))
		return retval;

	/* flush the ack before we write any messages back */
	ngbe_flush(hw);

	/**
	 * initialise structure to send to user application
	 * will return response from user in retval field
	 */
	ret_param.retval = NGBE_MB_EVENT_PROCEED;
	ret_param.vfid = vf;
	ret_param.msg_type = msgbuf[0] & 0xFFFF;
	ret_param.msg = (void *)msgbuf;

	/* perform VF reset */
	if (msgbuf[0] == NGBE_VF_RESET) {
		int ret = ngbe_vf_reset(eth_dev, vf, msgbuf);

		vfinfo[vf].clear_to_send = true;

		/* notify application about VF reset */
		rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_VF_MBOX,
					      &ret_param);
		return ret;
	}

	/**
	 * ask user application if we allowed to perform those functions
	 * if we get ret_param.retval == RTE_PMD_COMPAT_MB_EVENT_PROCEED
	 * then business as usual,
	 * if 0, do nothing and send ACK to VF
	 * if ret_param.retval > 1, do nothing and send NAK to VF
	 */
	rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_VF_MBOX,
				      &ret_param);

	retval = ret_param.retval;

	/* check & process VF to PF mailbox message */