blob: e57d23746585f7abe1d7d52e0045fde2b2839852 [file] [log] [blame]
/*
* Copyright (C) 2017 Netronome Systems, Inc.
*
* This software is dual licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
* source tree or the BSD 2-Clause License provided below. You have the
* option to license this software under the complete terms of either license.
*
* The BSD 2-Clause License:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/etherdevice.h>
#include <linux/lockdep.h>
#include <linux/pci.h>
#include <linux/skbuff.h>
#include <linux/vmalloc.h>
#include <net/devlink.h>
#include <net/dst_metadata.h>
#include "main.h"
#include "../nfpcore/nfp_cpp.h"
#include "../nfpcore/nfp_nffw.h"
#include "../nfpcore/nfp_nsp.h"
#include "../nfp_app.h"
#include "../nfp_main.h"
#include "../nfp_net.h"
#include "../nfp_net_repr.h"
#include "../nfp_port.h"
#include "./cmsg.h"
#define NFP_FLOWER_ALLOWED_VER 0x0001000000010000UL
static const char *nfp_flower_extra_cap(struct nfp_app *app, struct nfp_net *nn)
{
return "FLOWER";
}
static enum devlink_eswitch_mode eswitch_mode_get(struct nfp_app *app)
{
return DEVLINK_ESWITCH_MODE_SWITCHDEV;
}
static enum nfp_repr_type
nfp_flower_repr_get_type_and_port(struct nfp_app *app, u32 port_id, u8 *port)
{
switch (FIELD_GET(NFP_FLOWER_CMSG_PORT_TYPE, port_id)) {
case NFP_FLOWER_CMSG_PORT_TYPE_PHYS_PORT:
*port = FIELD_GET(NFP_FLOWER_CMSG_PORT_PHYS_PORT_NUM,
port_id);
return NFP_REPR_TYPE_PHYS_PORT;
case NFP_FLOWER_CMSG_PORT_TYPE_PCIE_PORT:
*port = FIELD_GET(NFP_FLOWER_CMSG_PORT_VNIC, port_id);
if (FIELD_GET(NFP_FLOWER_CMSG_PORT_VNIC_TYPE, port_id) ==
NFP_FLOWER_CMSG_PORT_VNIC_TYPE_PF)
return NFP_REPR_TYPE_PF;
else
return NFP_REPR_TYPE_VF;
}
return __NFP_REPR_TYPE_MAX;
}
static struct net_device *
nfp_flower_repr_get(struct nfp_app *app, u32 port_id)
{
enum nfp_repr_type repr_type;
struct nfp_reprs *reprs;
u8 port = 0;
repr_type = nfp_flower_repr_get_type_and_port(app, port_id, &port);
if (repr_type > NFP_REPR_TYPE_MAX)
return NULL;
reprs = rcu_dereference(app->reprs[repr_type]);
if (!reprs)
return NULL;
if (port >= reprs->num_reprs)
return NULL;
return rcu_dereference(reprs->reprs[port]);
}
static int
nfp_flower_reprs_reify(struct nfp_app *app, enum nfp_repr_type type,
bool exists)
{
struct nfp_reprs *reprs;
int i, err, count = 0;
reprs = rcu_dereference_protected(app->reprs[type],
lockdep_is_held(&app->pf->lock));
if (!reprs)
return 0;
for (i = 0; i < reprs->num_reprs; i++) {
struct net_device *netdev;
netdev = nfp_repr_get_locked(app, reprs, i);
if (netdev) {
struct nfp_repr *repr = netdev_priv(netdev);
err = nfp_flower_cmsg_portreify(repr, exists);
if (err)
return err;
count++;
}
}
return count;
}
static int
nfp_flower_wait_repr_reify(struct nfp_app *app, atomic_t *replies, int tot_repl)
{
struct nfp_flower_priv *priv = app->priv;
int err;
if (!tot_repl)
return 0;
lockdep_assert_held(&app->pf->lock);
err = wait_event_interruptible_timeout(priv->reify_wait_queue,
atomic_read(replies) >= tot_repl,
msecs_to_jiffies(10));
if (err <= 0) {
nfp_warn(app->cpp, "Not all reprs responded to reify\n");
return -EIO;
}
return 0;
}
static int
nfp_flower_repr_netdev_open(struct nfp_app *app, struct nfp_repr *repr)
{
int err;
err = nfp_flower_cmsg_portmod(repr, true, repr->netdev->mtu, false);
if (err)
return err;
netif_tx_wake_all_queues(repr->netdev);
return 0;
}
static int
nfp_flower_repr_netdev_stop(struct nfp_app *app, struct nfp_repr *repr)
{
netif_tx_disable(repr->netdev);
return nfp_flower_cmsg_portmod(repr, false, repr->netdev->mtu, false);
}
static int
nfp_flower_repr_netdev_init(struct nfp_app *app, struct net_device *netdev)
{
return tc_setup_cb_egdev_register(netdev,
nfp_flower_setup_tc_egress_cb,
netdev_priv(netdev));
}
static void
nfp_flower_repr_netdev_clean(struct nfp_app *app, struct net_device *netdev)
{
struct nfp_repr *repr = netdev_priv(netdev);
kfree(repr->app_priv);
tc_setup_cb_egdev_unregister(netdev, nfp_flower_setup_tc_egress_cb,
netdev_priv(netdev));
}
static void
nfp_flower_repr_netdev_preclean(struct nfp_app *app, struct net_device *netdev)
{
struct nfp_repr *repr = netdev_priv(netdev);
struct nfp_flower_priv *priv = app->priv;
atomic_t *replies = &priv->reify_replies;
int err;
atomic_set(replies, 0);
err = nfp_flower_cmsg_portreify(repr, false);
if (err) {
nfp_warn(app->cpp, "Failed to notify firmware about repr destruction\n");
return;
}
nfp_flower_wait_repr_reify(app, replies, 1);
}
static void nfp_flower_sriov_disable(struct nfp_app *app)
{
struct nfp_flower_priv *priv = app->priv;
if (!priv->nn)
return;
nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_VF);
}
static int
nfp_flower_spawn_vnic_reprs(struct nfp_app *app,
enum nfp_flower_cmsg_port_vnic_type vnic_type,
enum nfp_repr_type repr_type, unsigned int cnt)
{
u8 nfp_pcie = nfp_cppcore_pcie_unit(app->pf->cpp);
struct nfp_flower_priv *priv = app->priv;
atomic_t *replies = &priv->reify_replies;
struct nfp_flower_repr_priv *repr_priv;
enum nfp_port_type port_type;
struct nfp_repr *nfp_repr;
struct nfp_reprs *reprs;
int i, err, reify_cnt;
const u8 queue = 0;
port_type = repr_type == NFP_REPR_TYPE_PF ? NFP_PORT_PF_PORT :
NFP_PORT_VF_PORT;
reprs = nfp_reprs_alloc(cnt);
if (!reprs)
return -ENOMEM;
for (i = 0; i < cnt; i++) {
struct net_device *repr;
struct nfp_port *port;
u32 port_id;
repr = nfp_repr_alloc(app);
if (!repr) {
err = -ENOMEM;
goto err_reprs_clean;
}
repr_priv = kzalloc(sizeof(*repr_priv), GFP_KERNEL);
if (!repr_priv) {
err = -ENOMEM;
goto err_reprs_clean;
}
nfp_repr = netdev_priv(repr);
nfp_repr->app_priv = repr_priv;
/* For now we only support 1 PF */
WARN_ON(repr_type == NFP_REPR_TYPE_PF && i);
port = nfp_port_alloc(app, port_type, repr);
if (IS_ERR(port)) {
err = PTR_ERR(port);
nfp_repr_free(repr);
goto err_reprs_clean;
}
if (repr_type == NFP_REPR_TYPE_PF) {
port->pf_id = i;
port->vnic = priv->nn->dp.ctrl_bar;
} else {
port->pf_id = 0;
port->vf_id = i;
port->vnic =
app->pf->vf_cfg_mem + i * NFP_NET_CFG_BAR_SZ;
}
eth_hw_addr_random(repr);
port_id = nfp_flower_cmsg_pcie_port(nfp_pcie, vnic_type,
i, queue);
err = nfp_repr_init(app, repr,
port_id, port, priv->nn->dp.netdev);
if (err) {
nfp_port_free(port);
nfp_repr_free(repr);
goto err_reprs_clean;
}
RCU_INIT_POINTER(reprs->reprs[i], repr);
nfp_info(app->cpp, "%s%d Representor(%s) created\n",
repr_type == NFP_REPR_TYPE_PF ? "PF" : "VF", i,
repr->name);
}
nfp_app_reprs_set(app, repr_type, reprs);
atomic_set(replies, 0);
reify_cnt = nfp_flower_reprs_reify(app, repr_type, true);
if (reify_cnt < 0) {
err = reify_cnt;
nfp_warn(app->cpp, "Failed to notify firmware about repr creation\n");
goto err_reprs_remove;
}
err = nfp_flower_wait_repr_reify(app, replies, reify_cnt);
if (err)
goto err_reprs_remove;
return 0;
err_reprs_remove:
reprs = nfp_app_reprs_set(app, repr_type, NULL);
err_reprs_clean:
nfp_reprs_clean_and_free(app, reprs);
return err;
}
static int nfp_flower_sriov_enable(struct nfp_app *app, int num_vfs)
{
struct nfp_flower_priv *priv = app->priv;
if (!priv->nn)
return 0;
return nfp_flower_spawn_vnic_reprs(app,
NFP_FLOWER_CMSG_PORT_VNIC_TYPE_VF,
NFP_REPR_TYPE_VF, num_vfs);
}
static int
nfp_flower_spawn_phy_reprs(struct nfp_app *app, struct nfp_flower_priv *priv)
{
struct nfp_eth_table *eth_tbl = app->pf->eth_tbl;
atomic_t *replies = &priv->reify_replies;
struct nfp_flower_repr_priv *repr_priv;
struct nfp_repr *nfp_repr;
struct sk_buff *ctrl_skb;
struct nfp_reprs *reprs;
int err, reify_cnt;
unsigned int i;
ctrl_skb = nfp_flower_cmsg_mac_repr_start(app, eth_tbl->count);
if (!ctrl_skb)
return -ENOMEM;
reprs = nfp_reprs_alloc(eth_tbl->max_index + 1);
if (!reprs) {
err = -ENOMEM;
goto err_free_ctrl_skb;
}
for (i = 0; i < eth_tbl->count; i++) {
unsigned int phys_port = eth_tbl->ports[i].index;
struct net_device *repr;
struct nfp_port *port;
u32 cmsg_port_id;
repr = nfp_repr_alloc(app);
if (!repr) {
err = -ENOMEM;
goto err_reprs_clean;
}
repr_priv = kzalloc(sizeof(*repr_priv), GFP_KERNEL);
if (!repr_priv) {
err = -ENOMEM;
goto err_reprs_clean;
}
nfp_repr = netdev_priv(repr);
nfp_repr->app_priv = repr_priv;
port = nfp_port_alloc(app, NFP_PORT_PHYS_PORT, repr);
if (IS_ERR(port)) {
err = PTR_ERR(port);
nfp_repr_free(repr);
goto err_reprs_clean;
}
err = nfp_port_init_phy_port(app->pf, app, port, i);
if (err) {
nfp_port_free(port);
nfp_repr_free(repr);
goto err_reprs_clean;
}
SET_NETDEV_DEV(repr, &priv->nn->pdev->dev);
nfp_net_get_mac_addr(app->pf, repr, port);
cmsg_port_id = nfp_flower_cmsg_phys_port(phys_port);
err = nfp_repr_init(app, repr,
cmsg_port_id, port, priv->nn->dp.netdev);
if (err) {
nfp_port_free(port);
nfp_repr_free(repr);
goto err_reprs_clean;
}
nfp_flower_cmsg_mac_repr_add(ctrl_skb, i,
eth_tbl->ports[i].nbi,
eth_tbl->ports[i].base,
phys_port);
RCU_INIT_POINTER(reprs->reprs[phys_port], repr);
nfp_info(app->cpp, "Phys Port %d Representor(%s) created\n",
phys_port, repr->name);
}
nfp_app_reprs_set(app, NFP_REPR_TYPE_PHYS_PORT, reprs);
/* The REIFY/MAC_REPR control messages should be sent after the MAC
* representors are registered using nfp_app_reprs_set(). This is
* because the firmware may respond with control messages for the
* MAC representors, f.e. to provide the driver with information
* about their state, and without registration the driver will drop
* any such messages.
*/
atomic_set(replies, 0);
reify_cnt = nfp_flower_reprs_reify(app, NFP_REPR_TYPE_PHYS_PORT, true);
if (reify_cnt < 0) {
err = reify_cnt;
nfp_warn(app->cpp, "Failed to notify firmware about repr creation\n");
goto err_reprs_remove;
}
err = nfp_flower_wait_repr_reify(app, replies, reify_cnt);
if (err)
goto err_reprs_remove;
nfp_ctrl_tx(app->ctrl, ctrl_skb);
return 0;
err_reprs_remove:
reprs = nfp_app_reprs_set(app, NFP_REPR_TYPE_PHYS_PORT, NULL);
err_reprs_clean:
nfp_reprs_clean_and_free(app, reprs);
err_free_ctrl_skb:
kfree_skb(ctrl_skb);
return err;
}
static int nfp_flower_vnic_alloc(struct nfp_app *app, struct nfp_net *nn,
unsigned int id)
{
if (id > 0) {
nfp_warn(app->cpp, "FlowerNIC doesn't support more than one data vNIC\n");
goto err_invalid_port;
}
eth_hw_addr_random(nn->dp.netdev);
netif_keep_dst(nn->dp.netdev);
nn->vnic_no_name = true;
return 0;
err_invalid_port:
nn->port = nfp_port_alloc(app, NFP_PORT_INVALID, nn->dp.netdev);
return PTR_ERR_OR_ZERO(nn->port);
}
static void nfp_flower_vnic_clean(struct nfp_app *app, struct nfp_net *nn)
{
struct nfp_flower_priv *priv = app->priv;
if (app->pf->num_vfs)
nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_VF);
nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PF);
nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PHYS_PORT);
priv->nn = NULL;
}
static int nfp_flower_vnic_init(struct nfp_app *app, struct nfp_net *nn)
{
struct nfp_flower_priv *priv = app->priv;
int err;
priv->nn = nn;
err = nfp_flower_spawn_phy_reprs(app, app->priv);
if (err)
goto err_clear_nn;
err = nfp_flower_spawn_vnic_reprs(app,
NFP_FLOWER_CMSG_PORT_VNIC_TYPE_PF,
NFP_REPR_TYPE_PF, 1);
if (err)
goto err_destroy_reprs_phy;
if (app->pf->num_vfs) {
err = nfp_flower_spawn_vnic_reprs(app,
NFP_FLOWER_CMSG_PORT_VNIC_TYPE_VF,
NFP_REPR_TYPE_VF,
app->pf->num_vfs);
if (err)
goto err_destroy_reprs_pf;
}
return 0;
err_destroy_reprs_pf:
nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PF);
err_destroy_reprs_phy:
nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PHYS_PORT);
err_clear_nn:
priv->nn = NULL;
return err;
}
static int nfp_flower_init(struct nfp_app *app)
{
const struct nfp_pf *pf = app->pf;
struct nfp_flower_priv *app_priv;
u64 version, features;
int err;
if (!pf->eth_tbl) {
nfp_warn(app->cpp, "FlowerNIC requires eth table\n");
return -EINVAL;
}
if (!pf->mac_stats_bar) {
nfp_warn(app->cpp, "FlowerNIC requires mac_stats BAR\n");
return -EINVAL;
}
if (!pf->vf_cfg_bar) {
nfp_warn(app->cpp, "FlowerNIC requires vf_cfg BAR\n");
return -EINVAL;
}
version = nfp_rtsym_read_le(app->pf->rtbl, "hw_flower_version", &err);
if (err) {
nfp_warn(app->cpp, "FlowerNIC requires hw_flower_version memory symbol\n");
return err;
}
/* We need to ensure hardware has enough flower capabilities. */
if (version != NFP_FLOWER_ALLOWED_VER) {
nfp_warn(app->cpp, "FlowerNIC: unsupported firmware version\n");
return -EINVAL;
}
app_priv = vzalloc(sizeof(struct nfp_flower_priv));
if (!app_priv)
return -ENOMEM;
app->priv = app_priv;
app_priv->app = app;
skb_queue_head_init(&app_priv->cmsg_skbs_high);
skb_queue_head_init(&app_priv->cmsg_skbs_low);
INIT_WORK(&app_priv->cmsg_work, nfp_flower_cmsg_process_rx);
init_waitqueue_head(&app_priv->reify_wait_queue);
init_waitqueue_head(&app_priv->mtu_conf.wait_q);
spin_lock_init(&app_priv->mtu_conf.lock);
err = nfp_flower_metadata_init(app);
if (err)
goto err_free_app_priv;
/* Extract the extra features supported by the firmware. */
features = nfp_rtsym_read_le(app->pf->rtbl,
"_abi_flower_extra_features", &err);
if (err)
app_priv->flower_ext_feats = 0;
else
app_priv->flower_ext_feats = features;
/* Tell the firmware that the driver supports lag. */
err = nfp_rtsym_write_le(app->pf->rtbl,
"_abi_flower_balance_sync_enable", 1);
if (!err) {
app_priv->flower_ext_feats |= NFP_FL_FEATS_LAG;
nfp_flower_lag_init(&app_priv->nfp_lag);
} else if (err == -ENOENT) {
nfp_warn(app->cpp, "LAG not supported by FW.\n");
} else {
goto err_cleanup_metadata;
}
return 0;
err_cleanup_metadata:
nfp_flower_metadata_cleanup(app);
err_free_app_priv:
vfree(app->priv);
return err;
}
static void nfp_flower_clean(struct nfp_app *app)
{
struct nfp_flower_priv *app_priv = app->priv;
skb_queue_purge(&app_priv->cmsg_skbs_high);
skb_queue_purge(&app_priv->cmsg_skbs_low);
flush_work(&app_priv->cmsg_work);
if (app_priv->flower_ext_feats & NFP_FL_FEATS_LAG)
nfp_flower_lag_cleanup(&app_priv->nfp_lag);
nfp_flower_metadata_cleanup(app);
vfree(app->priv);
app->priv = NULL;
}
static bool nfp_flower_check_ack(struct nfp_flower_priv *app_priv)
{
bool ret;
spin_lock_bh(&app_priv->mtu_conf.lock);
ret = app_priv->mtu_conf.ack;
spin_unlock_bh(&app_priv->mtu_conf.lock);
return ret;
}
static int
nfp_flower_repr_change_mtu(struct nfp_app *app, struct net_device *netdev,
int new_mtu)
{
struct nfp_flower_priv *app_priv = app->priv;
struct nfp_repr *repr = netdev_priv(netdev);
int err, ack;
/* Only need to config FW for physical port MTU change. */
if (repr->port->type != NFP_PORT_PHYS_PORT)
return 0;
if (!(app_priv->flower_ext_feats & NFP_FL_NBI_MTU_SETTING)) {
nfp_err(app->cpp, "Physical port MTU setting not supported\n");
return -EINVAL;
}
spin_lock_bh(&app_priv->mtu_conf.lock);
app_priv->mtu_conf.ack = false;
app_priv->mtu_conf.requested_val = new_mtu;
app_priv->mtu_conf.portnum = repr->dst->u.port_info.port_id;
spin_unlock_bh(&app_priv->mtu_conf.lock);
err = nfp_flower_cmsg_portmod(repr, netif_carrier_ok(netdev), new_mtu,
true);
if (err) {
spin_lock_bh(&app_priv->mtu_conf.lock);
app_priv->mtu_conf.requested_val = 0;
spin_unlock_bh(&app_priv->mtu_conf.lock);
return err;
}
/* Wait for fw to ack the change. */
ack = wait_event_timeout(app_priv->mtu_conf.wait_q,
nfp_flower_check_ack(app_priv),
msecs_to_jiffies(10));
if (!ack) {
spin_lock_bh(&app_priv->mtu_conf.lock);
app_priv->mtu_conf.requested_val = 0;
spin_unlock_bh(&app_priv->mtu_conf.lock);
nfp_warn(app->cpp, "MTU change not verified with fw\n");
return -EIO;
}
return 0;
}
static int nfp_flower_start(struct nfp_app *app)
{
struct nfp_flower_priv *app_priv = app->priv;
int err;
if (app_priv->flower_ext_feats & NFP_FL_FEATS_LAG) {
err = nfp_flower_lag_reset(&app_priv->nfp_lag);
if (err)
return err;
err = register_netdevice_notifier(&app_priv->nfp_lag.lag_nb);
if (err)
return err;
}
return nfp_tunnel_config_start(app);
}
static void nfp_flower_stop(struct nfp_app *app)
{
struct nfp_flower_priv *app_priv = app->priv;
if (app_priv->flower_ext_feats & NFP_FL_FEATS_LAG)
unregister_netdevice_notifier(&app_priv->nfp_lag.lag_nb);
nfp_tunnel_config_stop(app);
}
const struct nfp_app_type app_flower = {
.id = NFP_APP_FLOWER_NIC,
.name = "flower",
.ctrl_cap_mask = ~0U,
.ctrl_has_meta = true,
.extra_cap = nfp_flower_extra_cap,
.init = nfp_flower_init,
.clean = nfp_flower_clean,
.repr_change_mtu = nfp_flower_repr_change_mtu,
.vnic_alloc = nfp_flower_vnic_alloc,
.vnic_init = nfp_flower_vnic_init,
.vnic_clean = nfp_flower_vnic_clean,
.repr_init = nfp_flower_repr_netdev_init,
.repr_preclean = nfp_flower_repr_netdev_preclean,
.repr_clean = nfp_flower_repr_netdev_clean,
.repr_open = nfp_flower_repr_netdev_open,
.repr_stop = nfp_flower_repr_netdev_stop,
.start = nfp_flower_start,
.stop = nfp_flower_stop,
.ctrl_msg_rx = nfp_flower_cmsg_rx,
.sriov_enable = nfp_flower_sriov_enable,
.sriov_disable = nfp_flower_sriov_disable,
.eswitch_mode_get = eswitch_mode_get,
.repr_get = nfp_flower_repr_get,
.setup_tc = nfp_flower_setup_tc,
};