netdev - [net-next PATCH 8/9] octeontx2-af: physical link state change

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Message-ID: <20221112043141.13291-9-hkelam@marvell.com>
Date:   Sat, 12 Nov 2022 10:01:40 +0530
From:   Hariprasad Kelam <hkelam@...vell.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <kuba@...nel.org>, <davem@...emloft.net>, <pabeni@...hat.com>,
        <edumazet@...gle.com>, <sgoutham@...vell.com>,
        <lcherian@...vell.com>, <gakula@...vell.com>, <jerinj@...vell.com>,
        <sbhatta@...vell.com>
Subject: [net-next PATCH 8/9] octeontx2-af: physical link state change

From: Vamsi Attunuru <vattunuru@...vell.com>

There are few scenarios where physical link change is required.
This patch adds mailbox support for the same such that PF and VF
netdevices can request for link change.

Signed-off-by: Vamsi Attunuru <vattunuru@...vell.com>
Signed-off-by: Hariprasad Kelam <hkelam@...vell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@...vell.com>
---
 .../net/ethernet/marvell/octeontx2/af/cgx.c   | 10 ++++++++
 .../net/ethernet/marvell/octeontx2/af/cgx.h   |  1 +
 .../net/ethernet/marvell/octeontx2/af/mbox.h  |  7 ++++++
 .../ethernet/marvell/octeontx2/af/rvu_cgx.c   | 24 +++++++++++++++++++
 4 files changed, 42 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
index 1383d1636cbe..33d1bd6734ea 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
@@ -1587,6 +1587,16 @@ static void cgx_lmac_linkup_work(struct work_struct *work)
 	}
 }
 
+int cgx_set_link_state(void *cgxd, int lmac_id, bool enable)
+{
+	struct cgx *cgx = cgxd;
+
+	if (!cgx)
+		return -ENODEV;
+
+	return cgx_fwi_link_change(cgx, lmac_id, enable);
+}
+
 int cgx_lmac_linkup_start(void *cgxd)
 {
 	struct cgx *cgx = cgxd;
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/cgx.h b/drivers/net/ethernet/marvell/octeontx2/af/cgx.h
index a34f45367d82..f62d033a511d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/cgx.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/cgx.h
@@ -163,6 +163,7 @@ int cgx_lmac_get_pause_frm(void *cgxd, int lmac_id,
 int cgx_lmac_set_pause_frm(void *cgxd, int lmac_id,
 			   u8 tx_pause, u8 rx_pause);
 void cgx_lmac_ptp_config(void *cgxd, int lmac_id, bool enable);
+int cgx_set_link_state(void *cgxd, int lmac_id, bool enable);
 u8 cgx_lmac_get_p2x(int cgx_id, int lmac_id);
 int cgx_set_fec(u64 fec, int cgx_id, int lmac_id);
 int cgx_get_fec_stats(void *cgxd, int lmac_id, struct cgx_fec_stats_rsp *rsp);
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
index 260c48ba2c98..fb895ace2b0d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
@@ -162,6 +162,8 @@ M(CGX_MAC_ADDR_DEL,	0x212, cgx_mac_addr_del, cgx_mac_addr_del_req,    \
 			       msg_rsp)		\
 M(CGX_MAC_MAX_ENTRIES_GET, 0x213, cgx_mac_max_entries_get, msg_req,    \
 				  cgx_max_dmac_entries_get_rsp)		\
+M(CGX_SET_LINK_STATE,	0x214, cgx_set_link_state,    \
+				cgx_set_link_state_msg, msg_rsp)	\
 M(CGX_FEC_STATS,	0x217, cgx_fec_stats, msg_req, cgx_fec_stats_rsp) \
 M(CGX_SET_LINK_MODE,	0x218, cgx_set_link_mode, cgx_set_link_mode_req,\
 			       cgx_set_link_mode_rsp)	\
@@ -713,6 +715,11 @@ struct npc_set_pkind {
 	u8 shift_dir; /* shift direction to get length of the header at var_len_off */
 };
 
+struct cgx_set_link_state_msg {
+	struct mbox_msghdr hdr;
+	u8 enable; /* '1' for link up, '0' for link down */
+};
+
 /* NPA mbox message formats */
 
 /* NPA mailbox error codes
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c
index b603fcb8673f..60c77db3ba6d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c
@@ -1137,6 +1137,30 @@ int rvu_mbox_handler_cgx_set_fec_param(struct rvu *rvu,
 	return 0;
 }
 
+int rvu_mbox_handler_cgx_set_link_state(struct rvu *rvu,
+					struct cgx_set_link_state_msg *req,
+					struct msg_rsp *rsp)
+{
+	u16 pcifunc = req->hdr.pcifunc;
+	u8 cgx_id, lmac_id;
+	int pf, err;
+
+	pf = rvu_get_pf(pcifunc);
+
+	if (!is_cgx_config_permitted(rvu, pcifunc))
+		return LMAC_AF_ERR_PERM_DENIED;
+
+	rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
+
+	err = cgx_set_link_state(rvu_cgx_pdata(cgx_id, rvu), lmac_id,
+				 !!req->enable);
+	if (err)
+		dev_warn(rvu->dev, "Cannot set link state to %s, err %d\n",
+			 (req->enable) ? "enable" : "disable", err);
+
+	return err;
+}
+
 int rvu_mbox_handler_cgx_get_aux_link_info(struct rvu *rvu, struct msg_req *req,
 					   struct cgx_fw_data *rsp)
 {
-- 
2.17.1