diff options
| author | Steen Hegelund <steen.hegelund@microchip.com> | 2022-11-09 14:41:11 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-11-11 13:39:12 +0300 |
| commit | 7de1dcadfaf9ada0d205fd50e3b0bde0e11e625b (patch) | |
| tree | 84e311e171a32a890291a94aea95ad2fa411d7eb /drivers/net/ethernet/microchip/vcap/vcap_api.c | |
| parent | d6c2964db3fee8b4512eb9e430f2081364c2fb90 (diff) | |
| download | linux-7de1dcadfaf9ada0d205fd50e3b0bde0e11e625b.tar.xz | |
net: microchip: sparx5: Find VCAP lookup from chain id
Add a helper function that finds the lookup index in a VCAP instance from
the chain id.
Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/microchip/vcap/vcap_api.c')
| -rw-r--r-- | drivers/net/ethernet/microchip/vcap/vcap_api.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api.c b/drivers/net/ethernet/microchip/vcap/vcap_api.c index ace2582d8552..d5b62e43d83f 100644 --- a/drivers/net/ethernet/microchip/vcap/vcap_api.c +++ b/drivers/net/ethernet/microchip/vcap/vcap_api.c @@ -644,6 +644,23 @@ static int vcap_write_rule(struct vcap_rule_internal *ri) return 0; } +/* Convert a chain id to a VCAP lookup index */ +int vcap_chain_id_to_lookup(struct vcap_admin *admin, int cur_cid) +{ + int lookup_first = admin->vinst * admin->lookups_per_instance; + int lookup_last = lookup_first + admin->lookups_per_instance; + int cid_next = admin->first_cid + VCAP_CID_LOOKUP_SIZE; + int cid = admin->first_cid; + int lookup; + + for (lookup = lookup_first; lookup < lookup_last; ++lookup, + cid += VCAP_CID_LOOKUP_SIZE, cid_next += VCAP_CID_LOOKUP_SIZE) + if (cur_cid >= cid && cur_cid < cid_next) + return lookup; + return 0; +} +EXPORT_SYMBOL_GPL(vcap_chain_id_to_lookup); + /* Lookup a vcap instance using chain id */ struct vcap_admin *vcap_find_admin(struct vcap_control *vctrl, int cid) { |