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The PGID (Port Group ID) table holds port masks for different purposes. The first 72 are reserved for port destination masks, flood masks, and CPU forwarding. The rest are shared between multicast, link aggregation, and virtualization profiles. The GLAG area is reserved to not be used by anything else, since it is a subset of the MCAST area. The arbiter keeps track of which entries are in use. You can ask for a free ID or give back one you are done using. Signed-off-by: Casper Andersson <casper.casan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include "sparx5_main.h"
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void sparx5_pgid_init(struct sparx5 *spx5)
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{
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int i;
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for (i = 0; i < PGID_TABLE_SIZE; i++)
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spx5->pgid_map[i] = SPX5_PGID_FREE;
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/* Reserved for unicast, flood control, broadcast, and CPU.
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* These cannot be freed.
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*/
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for (i = 0; i <= PGID_CPU; i++)
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spx5->pgid_map[i] = SPX5_PGID_RESERVED;
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}
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int sparx5_pgid_alloc_glag(struct sparx5 *spx5, u16 *idx)
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{
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int i;
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for (i = PGID_GLAG_START; i <= PGID_GLAG_END; i++)
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if (spx5->pgid_map[i] == SPX5_PGID_FREE) {
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spx5->pgid_map[i] = SPX5_PGID_GLAG;
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*idx = i;
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return 0;
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}
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return -EBUSY;
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}
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int sparx5_pgid_alloc_mcast(struct sparx5 *spx5, u16 *idx)
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{
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int i;
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for (i = PGID_MCAST_START; i < PGID_TABLE_SIZE; i++) {
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if (i == PGID_GLAG_START)
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i = PGID_GLAG_END + 1;
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if (spx5->pgid_map[i] == SPX5_PGID_FREE) {
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spx5->pgid_map[i] = SPX5_PGID_MULTICAST;
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*idx = i;
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return 0;
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}
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}
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return -EBUSY;
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}
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int sparx5_pgid_free(struct sparx5 *spx5, u16 idx)
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{
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if (idx <= PGID_CPU || idx >= PGID_TABLE_SIZE)
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return -EINVAL;
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if (spx5->pgid_map[idx] == SPX5_PGID_FREE)
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return -EINVAL;
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spx5->pgid_map[idx] = SPX5_PGID_FREE;
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return 0;
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}
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