sparx5_pgid.c

 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 < spx5->data->consts->n_pgids; 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 <= sparx5_get_pgid(spx5, 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 = sparx5_get_pgid(spx5, PGID_MCAST_START);
26	     i < spx5->data->consts->n_pgids; i++) {
27		if (spx5->pgid_map[i] == SPX5_PGID_FREE) {
28			spx5->pgid_map[i] = SPX5_PGID_MULTICAST;
29			*idx = i;
30			return 0;
31		}
32	}
33
34	return -EBUSY;
35}
36
37int sparx5_pgid_free(struct sparx5 *spx5, u16 idx)
38{
39	if (idx <= sparx5_get_pgid(spx5, PGID_CPU) ||
40	    idx >= spx5->data->consts->n_pgids)
41		return -EINVAL;
42
43	if (spx5->pgid_map[idx] == SPX5_PGID_FREE)
44		return -EINVAL;
45
46	spx5->pgid_map[idx] = SPX5_PGID_FREE;
47	return 0;
48}
49
50int sparx5_get_pgid(struct sparx5 *sparx5, int pgid)
51{
52	return sparx5->data->consts->n_ports + pgid;
53}