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From:   Veerasenareddy Burru <vburru@marvell.com>
To:     <vburru@marvell.com>, <davem@davemloft.net>, <kuba@kernel.org>,
        <corbet@lwn.net>, <netdev@vger.kernel.org>,
        <linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>
CC:     Abhijit Ayarekar <aayarekar@marvell.com>,
        Satananda Burla <sburla@marvell.com>
Subject: [net-next PATCH v4 5/7] octeon_ep: add support for ndo ops
Date:   Sun, 20 Mar 2022 22:53:35 -0700
Message-ID: <20220321055337.4488-6-vburru@marvell.com>
In-Reply-To: <20220321055337.4488-1-vburru@marvell.com>
References: <20220321055337.4488-1-vburru@marvell.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

Add support for ndo ops to set MAC address, change MTU, get stats.
Add control path support to set MAC address, change MTU, get stats,
set speed, get and set link mode.

Signed-off-by: Veerasenareddy Burru <vburru@marvell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@marvell.com>
Signed-off-by: Satananda Burla <sburla@marvell.com>
---
V3 -> V4:
  - fix build errors observed with "make W=1 C=1", missed to fix in
    v3 patchset.
  - declare variables used to access BAR space with "__iomem" attribute
    and use memcpy_fromio() instead of memcpy() from copying from
    __iomem regions.

V2 -> V3: no change.

V1 -> V2:
  - Address review comments:
      - declare variables in reversed Christmas tree, in all functions.
      - Replace {0} with {} to zero initialize a structure.
      - use success oriented approach when returning on error; Replace
            err = foo(..);
            if (!err) {
              /* Scucess */
              ....
            }
            return err;

                  with

            err = foo(..);
            if (err)
              return err;
            /* Success */
            ....
  - fix build errors observed with clang and "make W=1 C=1".

 .../marvell/octeon_ep/octep_ctrl_mbox.h       |  2 +-
 .../marvell/octeon_ep/octep_ctrl_net.c        | 60 ++++++++++++++
 .../ethernet/marvell/octeon_ep/octep_main.c   | 78 +++++++++++++++++++
 3 files changed, 139 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_mbox.h b/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_mbox.h
index 30f497f0bc26..2dc5753cfec6 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_mbox.h
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_mbox.h
@@ -120,7 +120,7 @@ struct octep_ctrl_mbox {
 	/* size of bar memory */
 	u32 barmem_sz;
 	/* pointer to BAR memory */
-	void __iomem *barmem;
+	u8 __iomem *barmem;
 	/* user context for callback, can be null */
 	void *user_ctx;
 	/* callback handler for processing request, called from octep_ctrl_mbox_recv */
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 c3aca7b2775b..7c00c896ab98 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.c
@@ -87,6 +87,66 @@ int octep_get_mac_addr(struct octep_device *oct, u8 *addr)
 	return err;
 }
 
+int octep_set_mac_addr(struct octep_device *oct, u8 *addr)
+{
+	struct octep_ctrl_net_h2f_req req = {};
+	struct octep_ctrl_mbox_msg msg = {};
+
+	req.hdr.cmd = OCTEP_CTRL_NET_H2F_CMD_MAC;
+	req.mac.cmd = OCTEP_CTRL_NET_CMD_SET;
+	memcpy(&req.mac.addr, addr, ETH_ALEN);
+
+	msg.hdr.flags = OCTEP_CTRL_MBOX_MSG_HDR_FLAG_REQ;
+	msg.hdr.sizew = OCTEP_CTRL_NET_H2F_MAC_REQ_SZW;
+	msg.msg = &req;
+
+	return octep_ctrl_mbox_send(&oct->ctrl_mbox, &msg);
+}
+
+int octep_set_mtu(struct octep_device *oct, int mtu)
+{
+	struct octep_ctrl_net_h2f_req req = {};
+	struct octep_ctrl_mbox_msg msg = {};
+
+	req.hdr.cmd = OCTEP_CTRL_NET_H2F_CMD_MTU;
+	req.mtu.cmd = OCTEP_CTRL_NET_CMD_SET;
+	req.mtu.val = mtu;
+
+	msg.hdr.flags = OCTEP_CTRL_MBOX_MSG_HDR_FLAG_REQ;
+	msg.hdr.sizew = OCTEP_CTRL_NET_H2F_MTU_REQ_SZW;
+	msg.msg = &req;
+
+	return octep_ctrl_mbox_send(&oct->ctrl_mbox, &msg);
+}
+
+int octep_get_if_stats(struct octep_device *oct)
+{
+	void __iomem *iface_rx_stats;
+	void __iomem *iface_tx_stats;
+	struct octep_ctrl_net_h2f_req req = {};
+	struct octep_ctrl_mbox_msg msg = {};
+	int err;
+
+	req.hdr.cmd = OCTEP_CTRL_NET_H2F_CMD_GET_IF_STATS;
+	req.mac.cmd = OCTEP_CTRL_NET_CMD_GET;
+	req.get_stats.offset = oct->ctrl_mbox_ifstats_offset;
+
+	msg.hdr.flags = OCTEP_CTRL_MBOX_MSG_HDR_FLAG_REQ;
+	msg.hdr.sizew = OCTEP_CTRL_NET_H2F_GET_STATS_REQ_SZW;
+	msg.msg = &req;
+	err = octep_ctrl_mbox_send(&oct->ctrl_mbox, &msg);
+	if (err)
+		return err;
+
+	iface_rx_stats = oct->ctrl_mbox.barmem + oct->ctrl_mbox_ifstats_offset;
+	iface_tx_stats = oct->ctrl_mbox.barmem + oct->ctrl_mbox_ifstats_offset +
+			 sizeof(struct octep_iface_rx_stats);
+	memcpy_fromio(&oct->iface_rx_stats, iface_rx_stats, sizeof(struct octep_iface_rx_stats));
+	memcpy_fromio(&oct->iface_tx_stats, iface_tx_stats, sizeof(struct octep_iface_tx_stats));
+
+	return err;
+}
+
 int octep_get_link_info(struct octep_device *oct)
 {
 	struct octep_ctrl_net_h2f_req req = {};
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index fc142a5f500b..68123cc45067 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -152,6 +152,43 @@ static netdev_tx_t octep_start_xmit(struct sk_buff *skb,
 	return NETDEV_TX_OK;
 }
 
+/**
+ * octep_get_stats64() - Get Octeon network device statistics.
+ *
+ * @netdev: kernel network device.
+ * @stats: pointer to stats structure to be filled in.
+ */
+static void octep_get_stats64(struct net_device *netdev,
+			      struct rtnl_link_stats64 *stats)
+{
+	u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
+	struct octep_device *oct = netdev_priv(netdev);
+	int q;
+
+	octep_get_if_stats(oct);
+	tx_packets = 0;
+	tx_bytes = 0;
+	rx_packets = 0;
+	rx_bytes = 0;
+	for (q = 0; q < oct->num_oqs; q++) {
+		struct octep_iq *iq = oct->iq[q];
+		struct octep_oq *oq = oct->oq[q];
+
+		tx_packets += iq->stats.instr_completed;
+		tx_bytes += iq->stats.bytes_sent;
+		rx_packets += oq->stats.packets;
+		rx_bytes += oq->stats.bytes;
+	}
+	stats->tx_packets = tx_packets;
+	stats->tx_bytes = tx_bytes;
+	stats->rx_packets = rx_packets;
+	stats->rx_bytes = rx_bytes;
+	stats->multicast = oct->iface_rx_stats.mcast_pkts;
+	stats->rx_errors = oct->iface_rx_stats.err_pkts;
+	stats->collisions = oct->iface_tx_stats.xscol;
+	stats->tx_fifo_errors = oct->iface_tx_stats.undflw;
+}
+
 /**
  * octep_tx_timeout_task - work queue task to Handle Tx queue timeout.
  *
@@ -190,11 +227,52 @@ static void octep_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 	queue_work(octep_wq, &oct->tx_timeout_task);
 }
 
+static int octep_set_mac(struct net_device *netdev, void *p)
+{
+	struct octep_device *oct = netdev_priv(netdev);
+	struct sockaddr *addr = (struct sockaddr *)p;
+	int err;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	err = octep_set_mac_addr(oct, addr->sa_data);
+	if (err)
+		return err;
+
+	memcpy(oct->mac_addr, addr->sa_data, ETH_ALEN);
+	eth_hw_addr_set(netdev, addr->sa_data);
+
+	return 0;
+}
+
+static int octep_change_mtu(struct net_device *netdev, int new_mtu)
+{
+	struct octep_device *oct = netdev_priv(netdev);
+	struct octep_iface_link_info *link_info;
+	int err = 0;
+
+	link_info = &oct->link_info;
+	if (link_info->mtu == new_mtu)
+		return 0;
+
+	err = octep_set_mtu(oct, new_mtu);
+	if (!err) {
+		oct->link_info.mtu = new_mtu;
+		netdev->mtu = new_mtu;
+	}
+
+	return err;
+}
+
 static const struct net_device_ops octep_netdev_ops = {
 	.ndo_open                = octep_open,
 	.ndo_stop                = octep_stop,
 	.ndo_start_xmit          = octep_start_xmit,
+	.ndo_get_stats64         = octep_get_stats64,
 	.ndo_tx_timeout          = octep_tx_timeout,
+	.ndo_set_mac_address     = octep_set_mac,
+	.ndo_change_mtu          = octep_change_mtu,
 };
 
 /**
-- 
2.17.1