linux-kernel - [PATCH net-next v2 3/4] net: microchip: vcap: Add vcap_rule_get_key

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Message-ID: <20221202075621.1504908-4-horatiu.vultur@microchip.com>
Date:   Fri, 2 Dec 2022 08:56:20 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <Steen.Hegelund@...rochip.com>,
        <lars.povlsen@...rochip.com>, <daniel.machon@...rochip.com>,
        <richardcochran@...il.com>, <UNGLinuxDriver@...rochip.com>,
        <olteanv@...il.com>, Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next v2 3/4] net: microchip: vcap: Add vcap_rule_get_key_u32

Add the function vcap_rule_get_key_u32 which allows to get the value and
the mask of a key that exist on the rule. If the key doesn't exist,
it would return error.

Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 drivers/net/ethernet/microchip/vcap/vcap_api.c   | 16 ++++++++++++++++
 .../ethernet/microchip/vcap/vcap_api_client.h    |  4 ++++
 2 files changed, 20 insertions(+)

diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api.c b/drivers/net/ethernet/microchip/vcap/vcap_api.c
index eae4e9fe0e147..05e915ea858d6 100644
--- a/drivers/net/ethernet/microchip/vcap/vcap_api.c
+++ b/drivers/net/ethernet/microchip/vcap/vcap_api.c
@@ -2338,6 +2338,22 @@ int vcap_rule_add_key_u128(struct vcap_rule *rule, enum vcap_key_field key,
 }
 EXPORT_SYMBOL_GPL(vcap_rule_add_key_u128);
 
+int vcap_rule_get_key_u32(struct vcap_rule *rule, enum vcap_key_field key,
+			  u32 *value, u32 *mask)
+{
+	struct vcap_client_keyfield *ckf;
+
+	ckf = vcap_find_keyfield(rule, key);
+	if (!ckf)
+		return -ENOENT;
+
+	*value = ckf->data.u32.value;
+	*mask = ckf->data.u32.mask;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(vcap_rule_get_key_u32);
+
 /* Find a client action field in a rule */
 static struct vcap_client_actionfield *
 vcap_find_actionfield(struct vcap_rule *rule, enum vcap_action_field act)
diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api_client.h b/drivers/net/ethernet/microchip/vcap/vcap_api_client.h
index fdfc5d58813bb..0319866f9c94d 100644
--- a/drivers/net/ethernet/microchip/vcap/vcap_api_client.h
+++ b/drivers/net/ethernet/microchip/vcap/vcap_api_client.h
@@ -258,4 +258,8 @@ int vcap_rule_mod_action_u32(struct vcap_rule *rule,
 			     enum vcap_action_field action,
 			     u32 value);
 
+/* Get a 32 bit key field value and mask from the rule */
+int vcap_rule_get_key_u32(struct vcap_rule *rule, enum vcap_key_field key,
+			  u32 *value, u32 *mask);
+
 #endif /* __VCAP_API_CLIENT__ */
-- 
2.38.0