Function ntb_dev_intr_handler

dpdk/drivers/raw/ntb/ntb.c:142–251

}

static void
ntb_dev_intr_handler(void *param)
{
	struct rte_rawdev *dev = (struct rte_rawdev *)param;
	struct ntb_hw *hw = dev->dev_private;
	uint32_t val_h, val_l;
	uint64_t peer_mw_size;
	uint64_t db_bits = 0;
	uint8_t peer_mw_cnt;
	int i = 0;

	if (hw->ntb_ops->db_read == NULL ||
	    hw->ntb_ops->db_clear == NULL ||
	    hw->ntb_ops->peer_db_set == NULL) {
		NTB_LOG(ERR, "Doorbell is not supported.");
		return;
	}

	db_bits = (*hw->ntb_ops->db_read)(dev);
	if (!db_bits)
		NTB_LOG(ERR, "No doorbells");

	/* Doorbell 0 is for peer device ready. */
	if (db_bits & 1) {
		NTB_LOG(INFO, "DB0: Peer device is up.");
		/* Clear received doorbell. */
		(*hw->ntb_ops->db_clear)(dev, 1);

		/**
		 * Peer dev is already up. All mw settings are already done.
		 * Skip them.
		 */
		if (hw->peer_dev_up)
			return;

		if (hw->ntb_ops->spad_read == NULL) {
			NTB_LOG(ERR, "Scratchpad read is not supported.");
			return;
		}

		/* Check if mw setting on the peer is the same as local. */
		peer_mw_cnt = (*hw->ntb_ops->spad_read)(dev, SPAD_NUM_MWS, 0);
		if (peer_mw_cnt != hw->mw_cnt) {
			NTB_LOG(ERR, "Both mw cnt must be the same.");
			return;
		}

		for (i = 0; i < hw->mw_cnt; i++) {
			val_h = (*hw->ntb_ops->spad_read)
				(dev, SPAD_MW0_SZ_H + 2 * i, 0);
			val_l = (*hw->ntb_ops->spad_read)
				(dev, SPAD_MW0_SZ_L + 2 * i, 0);
			peer_mw_size = ((uint64_t)val_h << 32) | val_l;
			NTB_LOG(DEBUG, "Peer %u mw size: 0x%"PRIx64"", i,
					peer_mw_size);
			if (peer_mw_size != hw->mw_size[i]) {
				NTB_LOG(ERR, "Mw config must be the same.");
				return;