1// SPDX-License-Identifier: GPL-2.0+
2#include "sparx5_main.h"
3
4void sparx5_pgid_init(struct sparx5 *spx5)
5{
6	int i;
7
8	for (i = 0; i < PGID_TABLE_SIZE; i++)
9		spx5->pgid_map[i] = SPX5_PGID_FREE;
10
11	/* Reserved for unicast, flood control, broadcast, and CPU.
12	 * These cannot be freed.
13	 */
14	for (i = 0; i <= PGID_CPU; i++)
15		spx5->pgid_map[i] = SPX5_PGID_RESERVED;
16}
17
18int sparx5_pgid_alloc_mcast(struct sparx5 *spx5, u16 *idx)
19{
20	int i;
21
22	/* The multicast area starts at index 65, but the first 7
23	 * are reserved for flood masks and CPU. Start alloc after that.
24	 */
25	for (i = PGID_MCAST_START; i < PGID_TABLE_SIZE; i++) {
26		if (spx5->pgid_map[i] == SPX5_PGID_FREE) {
27			spx5->pgid_map[i] = SPX5_PGID_MULTICAST;
28			*idx = i;
29			return 0;
30		}
31	}
32
33	return -EBUSY;
34}
35
36int sparx5_pgid_free(struct sparx5 *spx5, u16 idx)
37{
38	if (idx <= PGID_CPU || idx >= PGID_TABLE_SIZE)
39		return -EINVAL;
40
41	if (spx5->pgid_map[idx] == SPX5_PGID_FREE)
42		return -EINVAL;
43
44	spx5->pgid_map[idx] = SPX5_PGID_FREE;
45	return 0;
46}
47