C++ (Cpp) ntb_peer_port_count Examples

Example #1

File: ntb_pingpong.c Project: grate-driver/linux

static int pp_check_ntb(struct ntb_dev *ntb)
{
	u64 pmask;

	if (ntb_db_is_unsafe(ntb)) {
		dev_dbg(&ntb->dev, "Doorbell is unsafe\n");
		if (!unsafe)
			return -EINVAL;
	}

	if (ntb_spad_is_unsafe(ntb)) {
		dev_dbg(&ntb->dev, "Scratchpad is unsafe\n");
		if (!unsafe)
			return -EINVAL;
	}

	pmask = GENMASK_ULL(ntb_peer_port_count(ntb), 0);
	if ((ntb_db_valid_mask(ntb) & pmask) != pmask) {
		dev_err(&ntb->dev, "Unsupported DB configuration\n");
		return -EINVAL;
	}

	if (ntb_spad_count(ntb) < 1 && ntb_msg_count(ntb) < 1) {
		dev_err(&ntb->dev, "Scratchpads and messages unsupported\n");
		return -EINVAL;
	} else if (ntb_spad_count(ntb) < 1) {
		dev_dbg(&ntb->dev, "Scratchpads unsupported\n");
	} else if (ntb_msg_count(ntb) < 1) {
		dev_dbg(&ntb->dev, "Messages unsupported\n");
	}

	return 0;
}

Example #2

File: ntb_pingpong.c Project: grate-driver/linux

static void pp_init_flds(struct pp_ctx *pp)
{
	int pidx, lport, pcnt;

	/* Find global port index */
	lport = ntb_port_number(pp->ntb);
	pcnt = ntb_peer_port_count(pp->ntb);
	for (pidx = 0; pidx < pcnt; pidx++) {
		if (lport < ntb_peer_port_number(pp->ntb, pidx))
			break;
	}

	pp->in_db = BIT_ULL(lport);
	pp->pmask = GENMASK_ULL(pidx, 0) >> 1;
	pp->nmask = GENMASK_ULL(pcnt - 1, pidx);

	dev_dbg(&pp->ntb->dev, "Inbound db %#llx, prev %#llx, next %#llx\n",
		pp->in_db, pp->pmask, pp->nmask);
}

Example #3

File: ntb_tool.c Project: mdamt/linux

static int tool_probe(struct ntb_client *self, struct ntb_dev *ntb)
{
	struct tool_ctx *tc;
	int rc;
	int i;

	if (!ntb->ops->mw_set_trans) {
		dev_dbg(&ntb->dev, "need inbound MW based NTB API\n");
		rc = -EINVAL;
		goto err_tc;
	}

	if (ntb_spad_count(ntb) < 1) {
		dev_dbg(&ntb->dev, "no enough scratchpads\n");
		rc = -EINVAL;
		goto err_tc;
	}

	if (ntb_db_is_unsafe(ntb))
		dev_dbg(&ntb->dev, "doorbell is unsafe\n");

	if (ntb_spad_is_unsafe(ntb))
		dev_dbg(&ntb->dev, "scratchpad is unsafe\n");

	if (ntb_peer_port_count(ntb) != NTB_DEF_PEER_CNT)
		dev_warn(&ntb->dev, "multi-port NTB is unsupported\n");

	tc = kzalloc(sizeof(*tc), GFP_KERNEL);
	if (!tc) {
		rc = -ENOMEM;
		goto err_tc;
	}

	tc->ntb = ntb;
	init_waitqueue_head(&tc->link_wq);

	tc->mw_count = min(ntb_peer_mw_count(tc->ntb), MAX_MWS);
	for (i = 0; i < tc->mw_count; i++) {
		rc = tool_init_mw(tc, i);
		if (rc)
			goto err_ctx;
	}

	tool_setup_dbgfs(tc);

	rc = ntb_set_ctx(ntb, tc, &tool_ops);
	if (rc)
		goto err_ctx;

	ntb_link_enable(ntb, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);
	ntb_link_event(ntb);

	return 0;

err_ctx:
	tool_free_mws(tc);
	debugfs_remove_recursive(tc->dbgfs);
	kfree(tc);
err_tc:
	return rc;
}