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net: microchip: sparx5: Find VCAP lookup from chain id

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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>
This commit is contained in:
Steen Hegelund 2022-11-09 12:41:11 +01:00 committed by David S. Miller
parent d6c2964db3
commit 7de1dcadfa
2 changed files with 19 additions and 0 deletions
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17
drivers/net/ethernet/microchip/vcap/vcap_api.c
View File

@ -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)
{

2
drivers/net/ethernet/microchip/vcap/vcap_api_client.h
View File

@ -184,6 +184,8 @@ int vcap_rule_add_action_u32(struct vcap_rule *rule,
enum vcap_action_field action, u32 value);
/* VCAP lookup operations */
/* Convert a chain id to a VCAP lookup index */
int vcap_chain_id_to_lookup(struct vcap_admin *admin, int cur_cid);
/* Lookup a vcap instance using chain id */
struct vcap_admin *vcap_find_admin(struct vcap_control *vctrl, int cid);
/* Find information on a key field in a rule */