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Subject[PATCH net-next 2/4] net: microchip: vcap: Add vcap_mod_rule
Date
Add the function vcap_mod_rule which allows to update an existing rule
in the vcap. It is required for the rule to exist in the vcap to be able
to modify it.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
.../net/ethernet/microchip/vcap/vcap_api.c | 36 +++++++++++++++++++
.../ethernet/microchip/vcap/vcap_api_client.h | 2 ++
2 files changed, 38 insertions(+)

diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api.c b/drivers/net/ethernet/microchip/vcap/vcap_api.c
index 27128313f15f1..eae4e9fe0e147 100644
--- a/drivers/net/ethernet/microchip/vcap/vcap_api.c
+++ b/drivers/net/ethernet/microchip/vcap/vcap_api.c
@@ -1955,6 +1955,42 @@ struct vcap_rule *vcap_get_rule(struct vcap_control *vctrl, u32 id)
}
EXPORT_SYMBOL_GPL(vcap_get_rule);

+/* Update existing rule */
+int vcap_mod_rule(struct vcap_rule *rule)
+{
+ struct vcap_rule_internal *ri = to_intrule(rule);
+ struct vcap_counter ctr;
+ int err;
+
+ err = vcap_api_check(ri->vctrl);
+ if (err)
+ return err;
+
+ if (!vcap_lookup_rule(ri->vctrl, ri->data.id))
+ return -ENOENT;
+
+ mutex_lock(&ri->admin->lock);
+ /* Encode the bitstreams to the VCAP cache */
+ vcap_erase_cache(ri);
+ err = vcap_encode_rule(ri);
+ if (err)
+ goto out;
+
+ err = vcap_write_rule(ri);
+ if (err)
+ goto out;
+
+ memset(&ctr, 0, sizeof(ctr));
+ err = vcap_write_counter(ri, &ctr);
+ if (err)
+ goto out;
+
+out:
+ mutex_unlock(&ri->admin->lock);
+ return err;
+}
+EXPORT_SYMBOL_GPL(vcap_mod_rule);
+
/* Return the alignment offset for a new rule address */
static int vcap_valid_rule_move(struct vcap_rule_internal *el, int offset)
{
diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api_client.h b/drivers/net/ethernet/microchip/vcap/vcap_api_client.h
index a354dcd741e22..fdfc5d58813bb 100644
--- a/drivers/net/ethernet/microchip/vcap/vcap_api_client.h
+++ b/drivers/net/ethernet/microchip/vcap/vcap_api_client.h
@@ -172,6 +172,8 @@ int vcap_del_rule(struct vcap_control *vctrl, struct net_device *ndev, u32 id);
struct vcap_rule *vcap_copy_rule(struct vcap_rule *rule);
/* Get rule from a VCAP instance */
struct vcap_rule *vcap_get_rule(struct vcap_control *vctrl, u32 id);
+/* Update existing rule */
+int vcap_mod_rule(struct vcap_rule *rule);

/* Update the keyset for the rule */
int vcap_set_rule_set_keyset(struct vcap_rule *rule,
--
2.38.0
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