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// SPDX-License-Identifier: GPL-2.0
/* Marvell Octeon EP (EndPoint) Ethernet Driver
*
* Copyright (C) 2020 Marvell.
*
*/
#include <linux/string.h>
#include <linux/types.h>
#include <linux/etherdevice.h>
#include <linux/pci.h>
#include <linux/wait.h>
#include "octep_config.h"
#include "octep_main.h"
#include "octep_ctrl_net.h"
/* Control plane version */
#define OCTEP_CP_VERSION_CURRENT OCTEP_CP_VERSION(1, 0, 0)
static const u32 req_hdr_sz = sizeof(union octep_ctrl_net_req_hdr);
static const u32 mtu_sz = sizeof(struct octep_ctrl_net_h2f_req_cmd_mtu);
static const u32 mac_sz = sizeof(struct octep_ctrl_net_h2f_req_cmd_mac);
static const u32 state_sz = sizeof(struct octep_ctrl_net_h2f_req_cmd_state);
static const u32 link_info_sz = sizeof(struct octep_ctrl_net_link_info);
static atomic_t ctrl_net_msg_id;
/* Control plane version in which OCTEP_CTRL_NET_H2F_CMD was added */
static const u32 octep_ctrl_net_h2f_cmd_versions[OCTEP_CTRL_NET_H2F_CMD_MAX] = {
[OCTEP_CTRL_NET_H2F_CMD_INVALID ... OCTEP_CTRL_NET_H2F_CMD_DEV_REMOVE] =
OCTEP_CP_VERSION(1, 0, 0)
};
/* Control plane version in which OCTEP_CTRL_NET_F2H_CMD was added */
static const u32 octep_ctrl_net_f2h_cmd_versions[OCTEP_CTRL_NET_F2H_CMD_MAX] = {
[OCTEP_CTRL_NET_F2H_CMD_INVALID ... OCTEP_CTRL_NET_F2H_CMD_LINK_STATUS] =
OCTEP_CP_VERSION(1, 0, 0)
};
static void init_send_req(struct octep_ctrl_mbox_msg *msg, void *buf,
u16 sz, int vfid)
{
msg->hdr.s.flags = OCTEP_CTRL_MBOX_MSG_HDR_FLAG_REQ;
msg->hdr.s.msg_id = atomic_inc_return(&ctrl_net_msg_id) &
GENMASK(sizeof(msg->hdr.s.msg_id) * BITS_PER_BYTE, 0);
msg->hdr.s.sz = req_hdr_sz + sz;
msg->sg_num = 1;
msg->sg_list[0].msg = buf;
msg->sg_list[0].sz = msg->hdr.s.sz;
if (vfid != OCTEP_CTRL_NET_INVALID_VFID) {
msg->hdr.s.is_vf = 1;
msg->hdr.s.vf_idx = vfid;
}
}
static int octep_send_mbox_req(struct octep_device *oct,
struct octep_ctrl_net_wait_data *d,
bool wait_for_response)
{
int err, ret, cmd;
/* check if firmware is compatible for this request */
cmd = d->data.req.hdr.s.cmd;
if (octep_ctrl_net_h2f_cmd_versions[cmd] > oct->ctrl_mbox.max_fw_version ||
octep_ctrl_net_h2f_cmd_versions[cmd] < oct->ctrl_mbox.min_fw_version)
return -EOPNOTSUPP;
err = octep_ctrl_mbox_send(&oct->ctrl_mbox, &d->msg);
if (err < 0)
return err;
if (!wait_for_response)
return 0;
d->done = 0;
INIT_LIST_HEAD(&d->list);
list_add_tail(&d->list, &oct->ctrl_req_wait_list);
ret = wait_event_interruptible_timeout(oct->ctrl_req_wait_q,
(d->done != 0),
msecs_to_jiffies(500));
list_del(&d->list);
if (ret == 0 || ret == 1)
return -EAGAIN;
/**
* (ret == 0) cond = false && timeout, return 0
* (ret < 0) interrupted by signal, return 0
* (ret == 1) cond = true && timeout, return 1
* (ret >= 1) cond = true && !timeout, return 1
*/
if (d->data.resp.hdr.s.reply != OCTEP_CTRL_NET_REPLY_OK)
return -EAGAIN;
return 0;
}
int octep_ctrl_net_init(struct octep_device *oct)
{
struct octep_ctrl_mbox *ctrl_mbox;
struct pci_dev *pdev = oct->pdev;
int ret;
init_waitqueue_head(&oct->ctrl_req_wait_q);
INIT_LIST_HEAD(&oct->ctrl_req_wait_list);
/* Initialize control mbox */
ctrl_mbox = &oct->ctrl_mbox;
ctrl_mbox->version = OCTEP_CP_VERSION_CURRENT;
ctrl_mbox->barmem = CFG_GET_CTRL_MBOX_MEM_ADDR(oct->conf);
ret = octep_ctrl_mbox_init(ctrl_mbox);
if (ret) {
dev_err(&pdev->dev, "Failed to initialize control mbox\n");
return ret;
}
dev_info(&pdev->dev, "Control plane versions host: %llx, firmware: %x:%x\n",
ctrl_mbox->version, ctrl_mbox->min_fw_version,
ctrl_mbox->max_fw_version);
oct->ctrl_mbox_ifstats_offset = ctrl_mbox->barmem_sz;
return 0;
}
int octep_ctrl_net_get_link_status(struct octep_device *oct, int vfid)
{
struct octep_ctrl_net_wait_data d = {};
struct octep_ctrl_net_h2f_req *req = &d.data.req;
int err;
init_send_req(&d.msg, (void *)req, state_sz, vfid);
req->hdr.s.cmd = OCTEP_CTRL_NET_H2F_CMD_LINK_STATUS;
req->link.cmd = OCTEP_CTRL_NET_CMD_GET;
err = octep_send_mbox_req(oct, &d, true);
if (err < 0)
return err;
return d.data.resp.link.state;
}
int octep_ctrl_net_set_link_status(struct octep_device *oct, int vfid, bool up,
bool wait_for_response)
{
struct octep_ctrl_net_wait_data d = {};
struct octep_ctrl_net_h2f_req *req = &d.data.req;
init_send_req(&d.msg, req, state_sz, vfid);
req->hdr.s.cmd = OCTEP_CTRL_NET_H2F_CMD_LINK_STATUS;
req->link.cmd = OCTEP_CTRL_NET_CMD_SET;
req->link.state = (up) ? OCTEP_CTRL_NET_STATE_UP :
OCTEP_CTRL_NET_STATE_DOWN;
return octep_send_mbox_req(oct, &d, wait_for_response);
}
int octep_ctrl_net_set_rx_state(struct octep_device *oct, int vfid, bool up,
bool wait_for_response)
{
struct octep_ctrl_net_wait_data d = {};
struct octep_ctrl_net_h2f_req *req = &d.data.req;
init_send_req(&d.msg, req, state_sz, vfid);
req->hdr.s.cmd = OCTEP_CTRL_NET_H2F_CMD_RX_STATE;
req->link.cmd = OCTEP_CTRL_NET_CMD_SET;
req->link.state = (up) ? OCTEP_CTRL_NET_STATE_UP :
OCTEP_CTRL_NET_STATE_DOWN;
return octep_send_mbox_req(oct, &d, wait_for_response);
}
int octep_ctrl_net_get_mac_addr(struct octep_device *oct, int vfid, u8 *addr)
{
struct octep_ctrl_net_wait_data d = {};
struct octep_ctrl_net_h2f_req *req = &d.data.req;
int err;
init_send_req(&d.msg, req, mac_sz, vfid);
req->hdr.s.cmd = OCTEP_CTRL_NET_H2F_CMD_MAC;
req->link.cmd = OCTEP_CTRL_NET_CMD_GET;
err = octep_send_mbox_req(oct, &d, true);
if (err < 0)
return err;
memcpy(addr, d.data.resp.mac.addr, ETH_ALEN);
return 0;
}
int octep_ctrl_net_set_mac_addr(struct octep_device *oct, int vfid, u8 *addr,
bool wait_for_response)
{
struct octep_ctrl_net_wait_data d = {};
struct octep_ctrl_net_h2f_req *req = &d.data.req;
init_send_req(&d.msg, req, mac_sz, vfid);
req->hdr.s.cmd = OCTEP_CTRL_NET_H2F_CMD_MAC;
req->mac.cmd = OCTEP_CTRL_NET_CMD_SET;
memcpy(&req->mac.addr, addr, ETH_ALEN);
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)
{
struct octep_ctrl_net_wait_data d = {};
struct octep_ctrl_net_h2f_req *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_SET;
req->mtu.val = mtu;
return octep_send_mbox_req(oct, &d, wait_for_response);
}
int octep_ctrl_net_get_if_stats(struct octep_device *oct, int vfid,
struct octep_iface_rx_stats *rx_stats,
struct octep_iface_tx_stats *tx_stats)
{
struct octep_ctrl_net_wait_data d = {};
struct octep_ctrl_net_h2f_req *req = &d.data.req;
struct octep_ctrl_net_h2f_resp *resp;
int err;
init_send_req(&d.msg, req, 0, vfid);
req->hdr.s.cmd = OCTEP_CTRL_NET_H2F_CMD_GET_IF_STATS;
err = octep_send_mbox_req(oct, &d, true);
if (err < 0)
return err;
resp = &d.data.resp;
memcpy(rx_stats, &resp->if_stats.rx_stats, sizeof(struct octep_iface_rx_stats));
memcpy(tx_stats, &resp->if_stats.tx_stats, sizeof(struct octep_iface_tx_stats));
return 0;
}
int octep_ctrl_net_get_link_info(struct octep_device *oct, int vfid,
struct octep_iface_link_info *link_info)
{
struct octep_ctrl_net_wait_data d = {};
struct octep_ctrl_net_h2f_req *req = &d.data.req;
struct octep_ctrl_net_h2f_resp *resp;
int err;
init_send_req(&d.msg, req, link_info_sz, vfid);
req->hdr.s.cmd = OCTEP_CTRL_NET_H2F_CMD_LINK_INFO;
req->link_info.cmd = OCTEP_CTRL_NET_CMD_GET;
err = octep_send_mbox_req(oct, &d, true);
if (err < 0)
return err;
resp = &d.data.resp;
link_info->supported_modes = resp->link_info.supported_modes;
link_info->advertised_modes = resp->link_info.advertised_modes;
link_info->autoneg = resp->link_info.autoneg;
link_info->pause = resp->link_info.pause;
link_info->speed = resp->link_info.speed;
return 0;
}
int octep_ctrl_net_set_link_info(struct octep_device *oct, int vfid,
struct octep_iface_link_info *link_info,
bool wait_for_response)
{
struct octep_ctrl_net_wait_data d = {};
struct octep_ctrl_net_h2f_req *req = &d.data.req;
init_send_req(&d.msg, req, link_info_sz, vfid);
req->hdr.s.cmd = OCTEP_CTRL_NET_H2F_CMD_LINK_INFO;
req->link_info.cmd = OCTEP_CTRL_NET_CMD_SET;
req->link_info.info.advertised_modes = link_info->advertised_modes;
req->link_info.info.autoneg = link_info->autoneg;
req->link_info.info.pause = link_info->pause;
req->link_info.info.speed = link_info->speed;
return octep_send_mbox_req(oct, &d, wait_for_response);
}
static void process_mbox_resp(struct octep_device *oct,
struct octep_ctrl_mbox_msg *msg)
{
struct octep_ctrl_net_wait_data *pos, *n;
list_for_each_entry_safe(pos, n, &oct->ctrl_req_wait_list, list) {
if (pos->msg.hdr.s.msg_id == msg->hdr.s.msg_id) {
memcpy(&pos->data.resp,
msg->sg_list[0].msg,
msg->hdr.s.sz);
pos->done = 1;
wake_up_interruptible_all(&oct->ctrl_req_wait_q);
break;
}
}
}
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;
int cmd;
req = (struct octep_ctrl_net_f2h_req *)msg->sg_list[0].msg;
cmd = req->hdr.s.cmd;
/* check if we support this command */
if (octep_ctrl_net_f2h_cmd_versions[cmd] > OCTEP_CP_VERSION_CURRENT ||
octep_ctrl_net_f2h_cmd_versions[cmd] < OCTEP_CP_VERSION_CURRENT)
return -EOPNOTSUPP;
switch (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);
union octep_ctrl_net_max_data data = {};
struct octep_ctrl_mbox_msg msg = {};
int ret;
msg.hdr.s.sz = msg_sz;
msg.sg_num = 1;
msg.sg_list[0].sz = msg_sz;
msg.sg_list[0].msg = &data;
while (true) {
/* mbox will overwrite msg.hdr.s.sz so initialize it */
msg.hdr.s.sz = msg_sz;
ret = octep_ctrl_mbox_recv(&oct->ctrl_mbox, (struct octep_ctrl_mbox_msg *)&msg);
if (ret < 0)
break;
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);
}
}
int octep_ctrl_net_get_info(struct octep_device *oct, int vfid,
struct octep_fw_info *info)
{
struct octep_ctrl_net_wait_data d = {};
struct octep_ctrl_net_h2f_resp *resp;
struct octep_ctrl_net_h2f_req *req;
int err;
req = &d.data.req;
init_send_req(&d.msg, req, 0, vfid);
req->hdr.s.cmd = OCTEP_CTRL_NET_H2F_CMD_GET_INFO;
req->link_info.cmd = OCTEP_CTRL_NET_CMD_GET;
err = octep_send_mbox_req(oct, &d, true);
if (err < 0)
return err;
resp = &d.data.resp;
memcpy(info, &resp->info.fw_info, sizeof(struct octep_fw_info));
return 0;
}
int octep_ctrl_net_dev_remove(struct octep_device *oct, int vfid)
{
struct octep_ctrl_net_wait_data d = {};
struct octep_ctrl_net_h2f_req *req;
req = &d.data.req;
dev_dbg(&oct->pdev->dev, "Sending dev_unload msg to fw\n");
init_send_req(&d.msg, req, sizeof(int), vfid);
req->hdr.s.cmd = OCTEP_CTRL_NET_H2F_CMD_DEV_REMOVE;
return octep_send_mbox_req(oct, &d, false);
}
int octep_ctrl_net_uninit(struct octep_device *oct)
{
struct octep_ctrl_net_wait_data *pos, *n;
octep_ctrl_net_dev_remove(oct, OCTEP_CTRL_NET_INVALID_VFID);
list_for_each_entry_safe(pos, n, &oct->ctrl_req_wait_list, list)
pos->done = 1;
wake_up_interruptible_all(&oct->ctrl_req_wait_q);
octep_ctrl_mbox_uninit(&oct->ctrl_mbox);
return 0;
}
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