dev/cxgbe/t4_sge.c

1884 	u_int available, dbdiff;	/* # of hardware descriptors */
1899 			available = eq->sidx - 1;
1901 			available = IDXDIFF(eq->cidx, eq->pidx, eq->sidx) - 1;
1905 		if (available < n)
1925 		if (available < eq->sidx / 4 &&
2281 	int ndesc, available;
2307 		available = eq->sidx - 1;
2309 		available = IDXDIFF(eq->cidx, eq->pidx, eq->sidx) - 1;
2310 	if (available < ndesc)
2425 	u_int available, dbdiff;	/* # of hardware descriptors */
2448 	/* How many hardware descriptors do we have readily available. */
2450 		available = eq->sidx - 1;
2452 		available = IDXDIFF(eq->cidx, eq->pidx, eq->sidx) - 1;
2461 		if (available < SGE_MAX_WR_NDESC) {
2462 			available += reclaim_tx_descs(txq, 64);
2463 			if (available < howmany(mbuf_len16(m0), EQ_ESIZE / 16))
2477 			    available);
2479 		    try_txpkts(m0, r->items[next_cidx], &txp, available) == 0) {
2494 				    available) != 0)
2503 			n = write_txpkts_wr(txq, wr, m0, &txp, available);
2510 			n = write_txpkt_wr(txq, (void *)wr, m0, available);
2512 		MPASS(n >= 1 && n <= available && n <= SGE_MAX_WR_NDESC);
2514 		available -= n;
2530 			available += reclaim_tx_descs(txq, 4 * dbdiff);
4091  * descriptors are available.
4097     struct fw_eth_tx_pkt_vm_wr *wr, struct mbuf *m0, u_int available)
4109 	MPASS(available > 0 && available < eq->sidx);
4118 	MPASS(ndesc <= available);
4270  * descriptors are available.
4276     struct mbuf *m0, u_int available)
4288 	MPASS(available > 0 && available < eq->sidx);
4296 	else if (pktlen <= imm_payload(2) && available >= 2) {
4304 	MPASS(ndesc <= available);
4396 try_txpkts(struct mbuf *m, struct mbuf *n, struct txpkts *txp, u_int available)
4415 	if (needed > SGE_MAX_WR_NDESC || needed > available)
4430 add_to_txpkts(struct mbuf *m, struct txpkts *txp, u_int available)
4449 	if (needed > SGE_MAX_WR_NDESC || needed > available)
4463  * descriptors are available.
4469     struct mbuf *m0, const struct txpkts *txp, u_int available)
4486 	MPASS(available > 0 && available < eq->sidx);
4489 	MPASS(ndesc <= available);
4857 	 * bufsize available if there's nothing big enough for max payload.