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octeon_ep: get max rx packet length from firmware

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Max receive packet length can vary across SoCs, so
this needs to be queried from respective firmware and
filled by driver. A control net get mtu api should be
implemented to do the same.

Signed-off-by: Shinas Rasheed <srasheed@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shinas Rasheed 2023-11-22 10:34:35 -08:00 committed by David S. Miller
parent e40f4c4e50
commit 0a5f8534e3
4 changed files with 37 additions and 3 deletions
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2
drivers/net/ethernet/marvell/octeon_ep/octep_config.h
View file

@ -45,8 +45,6 @@
/* Minimum MTU supported by Octeon network interface */
#define OCTEP_MIN_MTU ETH_MIN_MTU
/* Maximum MTU supported by Octeon interface*/
#define OCTEP_MAX_MTU (10000 - (ETH_HLEN + ETH_FCS_LEN))
/* Default MTU */
#define OCTEP_DEFAULT_MTU 1500

18
drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.c
View file

@ -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 = {};
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)
{

10
drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.h
View file

@ -287,6 +287,16 @@ 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);
/**
* octep_ctrl_net_get_mtu() - Get max MTU from firmware.
*
* @oct: non-null pointer to struct octep_device.
* @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);
/**
* octep_ctrl_net_set_mtu() - Set mtu in firmware.
*

10
drivers/net/ethernet/marvell/octeon_ep/octep_main.c
View file

@ -1307,6 +1307,7 @@ 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);
@ -1377,8 +1378,15 @@ 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,