netdev - [PATCH net-next v4 6/8] octeon_ep: support asynchronous notifications

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Date:   Wed, 22 Mar 2023 02:19:55 -0700
From:   Veerasenareddy Burru <vburru@...vell.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <aayarekar@...vell.com>, <sedara@...vell.com>, <sburla@...vell.com>
CC:     <linux-doc@...r.kernel.org>,
        Veerasenareddy Burru <vburru@...vell.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH net-next v4 6/8] octeon_ep: support asynchronous notifications

Add asynchronous notification support to the control mailbox.

Signed-off-by: Veerasenareddy Burru <vburru@...vell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@...vell.com>
---
v3 -> v4:
 * 0005-xxx.patch in v3 is 0006-xxx.patch in v4.
 * addressed review comments
   https://lore.kernel.org/all/Y+0J94sowllCe5Gs@boxer/
   - fixed rct violation.
   - process_mbox_notify() now returns void.

v2 -> v3:
 * no change

v1 -> v2:
 * no change

 .../marvell/octeon_ep/octep_ctrl_net.c        | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.c b/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.c
index cef4bc3b1ec0..465eef2824e3 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.c
@@ -271,6 +271,33 @@ static void process_mbox_resp(struct octep_device *oct,
 	}
 }
 
+static int process_mbox_notify(struct octep_device *oct,
+			       struct octep_ctrl_mbox_msg *msg)
+{
+	struct net_device *netdev = oct->netdev;
+	struct octep_ctrl_net_f2h_req *req;
+
+	req = (struct octep_ctrl_net_f2h_req *)msg->sg_list[0].msg;
+	switch (req->hdr.s.cmd) {
+	case OCTEP_CTRL_NET_F2H_CMD_LINK_STATUS:
+		if (netif_running(netdev)) {
+			if (req->link.state) {
+				dev_info(&oct->pdev->dev, "netif_carrier_on\n");
+				netif_carrier_on(netdev);
+			} else {
+				dev_info(&oct->pdev->dev, "netif_carrier_off\n");
+				netif_carrier_off(netdev);
+			}
+		}
+		break;
+	default:
+		pr_info("Unknown mbox req : %u\n", req->hdr.s.cmd);
+		break;
+	}
+
+	return 0;
+}
+
 void octep_ctrl_net_recv_fw_messages(struct octep_device *oct)
 {
 	static u16 msg_sz = sizeof(union octep_ctrl_net_max_data);
@@ -291,6 +318,8 @@ void octep_ctrl_net_recv_fw_messages(struct octep_device *oct)
 
 		if (msg.hdr.s.flags & OCTEP_CTRL_MBOX_MSG_HDR_FLAG_RESP)
 			process_mbox_resp(oct, &msg);
+		else if (msg.hdr.s.flags & OCTEP_CTRL_MBOX_MSG_HDR_FLAG_NOTIFY)
+			process_mbox_notify(oct, &msg);
 	}
 }
 
-- 
2.36.0