linux-kernel - [PATCH net-next 1/3] net: marvell: prestera: Add router LPM ABI

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Date:   Wed, 16 Feb 2022 03:05:55 +0200
From:   Yevhen Orlov <yevhen.orlov@...ision.eu>
To:     netdev@...r.kernel.org
Cc:     Volodymyr Mytnyk <volodymyr.mytnyk@...ision.eu>,
        Taras Chornyi <taras.chornyi@...ision.eu>,
        Mickey Rachamim <mickeyr@...vell.com>,
        Serhiy Pshyk <serhiy.pshyk@...ision.eu>,
        Yevhen Orlov <yevhen.orlov@...ision.eu>,
        Taras Chornyi <tchornyi@...vell.com>,
        Oleksandr Mazur <oleksandr.mazur@...ision.eu>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 1/3] net: marvell: prestera: Add router LPM ABI

Add functions to create/delete lpm entry in hw.
prestera_hw_lpm_add() take index of allocated virtual router.
Also it takes grp_id, which is index of allocated nexthop group.
ABI to create nexthop group will be added soon.

Co-developed-by: Taras Chornyi <tchornyi@...vell.com>
Signed-off-by: Taras Chornyi <tchornyi@...vell.com>
Co-developed-by: Oleksandr Mazur <oleksandr.mazur@...ision.eu>
Signed-off-by: Oleksandr Mazur <oleksandr.mazur@...ision.eu>
Signed-off-by: Yevhen Orlov <yevhen.orlov@...ision.eu>
---
 .../ethernet/marvell/prestera/prestera_hw.c   | 49 +++++++++++++++++++
 .../ethernet/marvell/prestera/prestera_hw.h   |  6 +++
 2 files changed, 55 insertions(+)

diff --git a/drivers/net/ethernet/marvell/prestera/prestera_hw.c b/drivers/net/ethernet/marvell/prestera/prestera_hw.c
index e6bfadc874c5..fca25b796cf7 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_hw.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_hw.c
@@ -55,6 +55,8 @@ enum prestera_cmd_type_t {
 
 	PRESTERA_CMD_TYPE_ROUTER_RIF_CREATE = 0x600,
 	PRESTERA_CMD_TYPE_ROUTER_RIF_DELETE = 0x601,
+	PRESTERA_CMD_TYPE_ROUTER_LPM_ADD = 0x610,
+	PRESTERA_CMD_TYPE_ROUTER_LPM_DELETE = 0x611,
 	PRESTERA_CMD_TYPE_ROUTER_VR_CREATE = 0x630,
 	PRESTERA_CMD_TYPE_ROUTER_VR_DELETE = 0x631,
 
@@ -499,6 +501,15 @@ struct prestera_msg_iface {
 	u8 __pad[3];
 };
 
+struct prestera_msg_ip_addr {
+	union {
+		__be32 ipv4;
+		__be32 ipv6[4];
+	} u;
+	u8 v; /* e.g. PRESTERA_IPV4 */
+	u8 __pad[3];
+};
+
 struct prestera_msg_rif_req {
 	struct prestera_msg_cmd cmd;
 	struct prestera_msg_iface iif;
@@ -515,6 +526,15 @@ struct prestera_msg_rif_resp {
 	u8 __pad[2];
 };
 
+struct prestera_msg_lpm_req {
+	struct prestera_msg_cmd cmd;
+	struct prestera_msg_ip_addr dst;
+	__le32 grp_id;
+	__le32 dst_len;
+	__le16 vr_id;
+	u8 __pad[2];
+};
+
 struct prestera_msg_vr_req {
 	struct prestera_msg_cmd cmd;
 	__le16 vr_id;
@@ -598,9 +618,11 @@ static void prestera_hw_build_tests(void)
 	BUILD_BUG_ON(sizeof(struct prestera_msg_counter_stats) != 16);
 	BUILD_BUG_ON(sizeof(struct prestera_msg_rif_req) != 36);
 	BUILD_BUG_ON(sizeof(struct prestera_msg_vr_req) != 8);
+	BUILD_BUG_ON(sizeof(struct prestera_msg_lpm_req) != 36);
 
 	/*  structure that are part of req/resp fw messages */
 	BUILD_BUG_ON(sizeof(struct prestera_msg_iface) != 16);
+	BUILD_BUG_ON(sizeof(struct prestera_msg_ip_addr) != 20);
 
 	/* check responses */
 	BUILD_BUG_ON(sizeof(struct prestera_msg_common_resp) != 8);
@@ -1891,6 +1913,33 @@ int prestera_hw_vr_delete(struct prestera_switch *sw, u16 vr_id)
 			    sizeof(req));
 }
 
+int prestera_hw_lpm_add(struct prestera_switch *sw, u16 vr_id,
+			__be32 dst, u32 dst_len, u32 grp_id)
+{
+	struct prestera_msg_lpm_req req = {
+		.dst_len = __cpu_to_le32(dst_len),
+		.vr_id = __cpu_to_le16(vr_id),
+		.grp_id = __cpu_to_le32(grp_id),
+		.dst.u.ipv4 = dst
+	};
+
+	return prestera_cmd(sw, PRESTERA_CMD_TYPE_ROUTER_LPM_ADD, &req.cmd,
+			    sizeof(req));
+}
+
+int prestera_hw_lpm_del(struct prestera_switch *sw, u16 vr_id,
+			__be32 dst, u32 dst_len)
+{
+	struct prestera_msg_lpm_req req = {
+		.dst_len = __cpu_to_le32(dst_len),
+		.vr_id = __cpu_to_le16(vr_id),
+		.dst.u.ipv4 = dst
+	};
+
+	return prestera_cmd(sw, PRESTERA_CMD_TYPE_ROUTER_LPM_DELETE, &req.cmd,
+			    sizeof(req));
+}
+
 int prestera_hw_rxtx_init(struct prestera_switch *sw,
 			  struct prestera_rxtx_params *params)
 {
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_hw.h b/drivers/net/ethernet/marvell/prestera/prestera_hw.h
index 3ff12bae5909..fd896a8838bb 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_hw.h
+++ b/drivers/net/ethernet/marvell/prestera/prestera_hw.h
@@ -249,6 +249,12 @@ int prestera_hw_rif_delete(struct prestera_switch *sw, u16 rif_id,
 int prestera_hw_vr_create(struct prestera_switch *sw, u16 *vr_id);
 int prestera_hw_vr_delete(struct prestera_switch *sw, u16 vr_id);
 
+/* LPM PI */
+int prestera_hw_lpm_add(struct prestera_switch *sw, u16 vr_id,
+			__be32 dst, u32 dst_len, u32 grp_id);
+int prestera_hw_lpm_del(struct prestera_switch *sw, u16 vr_id,
+			__be32 dst, u32 dst_len);
+
 /* Event handlers */
 int prestera_hw_event_handler_register(struct prestera_switch *sw,
 				       enum prestera_event_type type,
-- 
2.17.1