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Message-ID: <20231121191224.2489474-1-srasheed@marvell.com>
Date: Tue, 21 Nov 2023 11:12:23 -0800
From: Shinas Rasheed <srasheed@...vell.com>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <hgani@...vell.com>, <vimleshk@...vell.com>, <egallen@...hat.com>,
<mschmidt@...hat.com>, <pabeni@...hat.com>, <horms@...nel.org>,
<kuba@...nel.org>, <davem@...emloft.net>, <wizhao@...hat.com>,
<konguyen@...hat.com>, Shinas Rasheed <srasheed@...vell.com>,
"Veerasenareddy
Burru" <vburru@...vell.com>,
Sathesh Edara <sedara@...vell.com>,
Eric Dumazet
<edumazet@...gle.com>
Subject: [PATCH net-next v1] octeon_ep: get max rx packet length from firmware
Fill max rx packet length value from firmware.
Signed-off-by: Shinas Rasheed <srasheed@...vell.com>
---
.../marvell/octeon_ep/octep_ctrl_net.c | 18 ++++++++++++++++++
.../marvell/octeon_ep/octep_ctrl_net.h | 9 +++++++++
.../ethernet/marvell/octeon_ep/octep_main.c | 10 +++++++++-
3 files changed, 36 insertions(+), 1 deletion(-)
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 6dd3d03c1c0f..c9fcebb9bd9b 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.c
@@ -198,6 +198,24 @@ int octep_ctrl_net_set_mac_addr(struct octep_device *oct, int vfid, u8 *addr,
return octep_send_mbox_req(oct, &d, wait_for_response);
}
+int octep_ctrl_net_get_mtu(struct octep_device *oct, int vfid)
+{
+ struct octep_ctrl_net_wait_data d = {0};
+ struct octep_ctrl_net_h2f_req *req;
+ int err;
+
+ req = &d.data.req;
+ init_send_req(&d.msg, req, mtu_sz, vfid);
+ req->hdr.s.cmd = OCTEP_CTRL_NET_H2F_CMD_MTU;
+ req->mtu.cmd = OCTEP_CTRL_NET_CMD_GET;
+
+ err = octep_send_mbox_req(oct, &d, true);
+ if (err < 0)
+ return err;
+
+ return d.data.resp.mtu.val;
+}
+
int octep_ctrl_net_set_mtu(struct octep_device *oct, int vfid, int mtu,
bool wait_for_response)
{
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.h b/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.h
index 4bb97ad1f1c6..46ddaa5c64d1 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.h
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.h
@@ -282,6 +282,15 @@ int octep_ctrl_net_get_mac_addr(struct octep_device *oct, int vfid, u8 *addr);
int octep_ctrl_net_set_mac_addr(struct octep_device *oct, int vfid, u8 *addr,
bool wait_for_response);
+/** Get max MTU from firmware.
+ *
+ * @param oct: non-null pointer to struct octep_device.
+ * @param vfid: Index of virtual function.
+ *
+ * return value: mtu on success, -errno on failure.
+ */
+int octep_ctrl_net_get_mtu(struct octep_device *oct, int vfid);
+
/** Set mtu in firmware.
*
* @param oct: non-null pointer to struct octep_device.
diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index 3cee69b3ac38..f9c539178114 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -1276,6 +1276,7 @@ static int octep_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct octep_device *octep_dev = NULL;
struct net_device *netdev;
+ int max_rx_pktlen;
int err;
err = pci_enable_device(pdev);
@@ -1346,8 +1347,15 @@ static int octep_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
netdev->hw_features = NETIF_F_SG;
netdev->features |= netdev->hw_features;
+
+ max_rx_pktlen = octep_ctrl_net_get_mtu(octep_dev, OCTEP_CTRL_NET_INVALID_VFID);
+ if (max_rx_pktlen < 0) {
+ dev_err(&octep_dev->pdev->dev,
+ "Failed to get max receive packet size; err = %d\n", max_rx_pktlen);
+ goto register_dev_err;
+ }
netdev->min_mtu = OCTEP_MIN_MTU;
- netdev->max_mtu = OCTEP_MAX_MTU;
+ netdev->max_mtu = max_rx_pktlen - (ETH_HLEN + ETH_FCS_LEN);
netdev->mtu = OCTEP_DEFAULT_MTU;
err = octep_ctrl_net_get_mac_addr(octep_dev, OCTEP_CTRL_NET_INVALID_VFID,
--
2.25.1
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