47 static inline unsigned mk_qpn(struct qib_qpn_table *qpt,  in mk_qpn()  argument
50 	return (map - qpt->map) * BITS_PER_PAGE + off;  in mk_qpn()
53 static inline unsigned find_next_offset(struct qib_qpn_table *qpt,  in find_next_offset()  argument
57 	if (qpt->mask) {  in find_next_offset()
59 		if (((off & qpt->mask) >> 1) >= n)  in find_next_offset()
60 			off = (off | qpt->mask) + 2;  in find_next_offset()
103 static void get_map_page(struct qib_qpn_table *qpt, struct qpn_map *map,  in get_map_page()  argument
112 	spin_lock(&qpt->lock);  in get_map_page()
117 	spin_unlock(&qpt->lock);  in get_map_page()
124 static int alloc_qpn(struct qib_devdata *dd, struct qib_qpn_table *qpt,  in alloc_qpn()  argument
136 		spin_lock(&qpt->lock);  in alloc_qpn()
137 		if (qpt->flags & n)  in alloc_qpn()
140 			qpt->flags |= n;  in alloc_qpn()
141 		spin_unlock(&qpt->lock);  in alloc_qpn()
145 	qpn = qpt->last + 2;  in alloc_qpn()
148 	if (qpt->mask && ((qpn & qpt->mask) >> 1) >= dd->n_krcv_queues)  in alloc_qpn()
149 		qpn = (qpn | qpt->mask) + 2;  in alloc_qpn()
151 	map = &qpt->map[qpn / BITS_PER_PAGE];  in alloc_qpn()
152 	max_scan = qpt->nmaps - !offset;  in alloc_qpn()
155 			get_map_page(qpt, map, gfp);  in alloc_qpn()
161 				qpt->last = qpn;  in alloc_qpn()
165 			offset = find_next_offset(qpt, map, offset,  in alloc_qpn()
167 			qpn = mk_qpn(qpt, map, offset);  in alloc_qpn()
183 			if (qpt->nmaps == QPNMAP_ENTRIES)  in alloc_qpn()
185 			map = &qpt->map[qpt->nmaps++];  in alloc_qpn()
187 		} else if (map < &qpt->map[qpt->nmaps]) {  in alloc_qpn()
191 			map = &qpt->map[0];  in alloc_qpn()
194 		qpn = mk_qpn(qpt, map, offset);  in alloc_qpn()
203 static void free_qpn(struct qib_qpn_table *qpt, u32 qpn)  in free_qpn()  argument
207 	map = qpt->map + qpn / BITS_PER_PAGE;  in free_qpn()
1255 void qib_init_qpn_table(struct qib_devdata *dd, struct qib_qpn_table *qpt)  in qib_init_qpn_table()  argument
1257 	spin_lock_init(&qpt->lock);  in qib_init_qpn_table()
1258 	qpt->last = 1;          /* start with QPN 2 */  in qib_init_qpn_table()
1259 	qpt->nmaps = 1;  in qib_init_qpn_table()
1260 	qpt->mask = dd->qpn_mask;  in qib_init_qpn_table()
1267 void qib_free_qpn_table(struct qib_qpn_table *qpt)  in qib_free_qpn_table()  argument
1271 	for (i = 0; i < ARRAY_SIZE(qpt->map); i++)  in qib_free_qpn_table()
1272 		if (qpt->map[i].page)  in qib_free_qpn_table()
1273 			free_page((unsigned long) qpt->map[i].page);  in qib_free_qpn_table()