blob: 9183b3e85d217dec1328065f4594ce5e5895491d [file] [log] [blame]
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2018 Netronome Systems, Inc. */
#include <linux/bitfield.h>
#include <linux/bitmap.h>
#include <linux/etherdevice.h>
#include <linux/lockdep.h>
#include <linux/netdevice.h>
#include <linux/rcupdate.h>
#include <linux/rtnetlink.h>
#include <linux/slab.h>
#include "../nfpcore/nfp.h"
#include "../nfpcore/nfp_cpp.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 "main.h"
static u32 nfp_abm_portid(enum nfp_repr_type rtype, unsigned int id)
{
return FIELD_PREP(NFP_ABM_PORTID_TYPE, rtype) |
FIELD_PREP(NFP_ABM_PORTID_ID, id);
}
static int
nfp_abm_setup_tc(struct nfp_app *app, struct net_device *netdev,
enum tc_setup_type type, void *type_data)
{
struct nfp_repr *repr = netdev_priv(netdev);
struct nfp_port *port;
port = nfp_port_from_netdev(netdev);
if (!port || port->type != NFP_PORT_PF_PORT)
return -EOPNOTSUPP;
switch (type) {
case TC_SETUP_ROOT_QDISC:
return nfp_abm_setup_root(netdev, repr->app_priv, type_data);
case TC_SETUP_QDISC_MQ:
return nfp_abm_setup_tc_mq(netdev, repr->app_priv, type_data);
case TC_SETUP_QDISC_RED:
return nfp_abm_setup_tc_red(netdev, repr->app_priv, type_data);
case TC_SETUP_QDISC_GRED:
return nfp_abm_setup_tc_gred(netdev, repr->app_priv, type_data);
case TC_SETUP_BLOCK:
return nfp_abm_setup_cls_block(netdev, repr, type_data);
default:
return -EOPNOTSUPP;
}
}
static struct net_device *
nfp_abm_repr_get(struct nfp_app *app, u32 port_id, bool *redir_egress)
{
enum nfp_repr_type rtype;
struct nfp_reprs *reprs;
u8 port;
rtype = FIELD_GET(NFP_ABM_PORTID_TYPE, port_id);
port = FIELD_GET(NFP_ABM_PORTID_ID, port_id);
reprs = rcu_dereference(app->reprs[rtype]);
if (!reprs)
return NULL;
if (port >= reprs->num_reprs)
return NULL;
return rcu_dereference(reprs->reprs[port]);
}
static int
nfp_abm_spawn_repr(struct nfp_app *app, struct nfp_abm_link *alink,
enum nfp_port_type ptype)
{
struct net_device *netdev;
enum nfp_repr_type rtype;
struct nfp_reprs *reprs;
struct nfp_repr *repr;
struct nfp_port *port;
unsigned int txqs;
int err;
if (ptype == NFP_PORT_PHYS_PORT) {
rtype = NFP_REPR_TYPE_PHYS_PORT;
txqs = 1;
} else {
rtype = NFP_REPR_TYPE_PF;
txqs = alink->vnic->max_rx_rings;
}
netdev = nfp_repr_alloc_mqs(app, txqs, 1);
if (!netdev)
return -ENOMEM;
repr = netdev_priv(netdev);
repr->app_priv = alink;
port = nfp_port_alloc(app, ptype, netdev);
if (IS_ERR(port)) {
err = PTR_ERR(port);
goto err_free_repr;
}
if (ptype == NFP_PORT_PHYS_PORT) {
port->eth_forced = true;
err = nfp_port_init_phy_port(app->pf, app, port, alink->id);
if (err)
goto err_free_port;
} else {
port->pf_id = alink->abm->pf_id;
port->pf_split = app->pf->max_data_vnics > 1;
port->pf_split_id = alink->id;
port->vnic = alink->vnic->dp.ctrl_bar;
}
SET_NETDEV_DEV(netdev, &alink->vnic->pdev->dev);
eth_hw_addr_random(netdev);
err = nfp_repr_init(app, netdev, nfp_abm_portid(rtype, alink->id),
port, alink->vnic->dp.netdev);
if (err)
goto err_free_port;
reprs = nfp_reprs_get_locked(app, rtype);
WARN(nfp_repr_get_locked(app, reprs, alink->id), "duplicate repr");
rtnl_lock();
rcu_assign_pointer(reprs->reprs[alink->id], netdev);
rtnl_unlock();
nfp_info(app->cpp, "%s Port %d Representor(%s) created\n",
ptype == NFP_PORT_PF_PORT ? "PCIe" : "Phys",
alink->id, netdev->name);
return 0;
err_free_port:
nfp_port_free(port);
err_free_repr:
nfp_repr_free(netdev);
return err;
}
static void
nfp_abm_kill_repr(struct nfp_app *app, struct nfp_abm_link *alink,
enum nfp_repr_type rtype)
{
struct net_device *netdev;
struct nfp_reprs *reprs;
reprs = nfp_reprs_get_locked(app, rtype);
netdev = nfp_repr_get_locked(app, reprs, alink->id);
if (!netdev)
return;
rtnl_lock();
rcu_assign_pointer(reprs->reprs[alink->id], NULL);
rtnl_unlock();
synchronize_rcu();
/* Cast to make sure nfp_repr_clean_and_free() takes a nfp_repr */
nfp_repr_clean_and_free((struct nfp_repr *)netdev_priv(netdev));
}
static void
nfp_abm_kill_reprs(struct nfp_abm *abm, struct nfp_abm_link *alink)
{
nfp_abm_kill_repr(abm->app, alink, NFP_REPR_TYPE_PF);
nfp_abm_kill_repr(abm->app, alink, NFP_REPR_TYPE_PHYS_PORT);
}
static void nfp_abm_kill_reprs_all(struct nfp_abm *abm)
{
struct nfp_pf *pf = abm->app->pf;
struct nfp_net *nn;
list_for_each_entry(nn, &pf->vnics, vnic_list)
nfp_abm_kill_reprs(abm, (struct nfp_abm_link *)nn->app_priv);
}
static enum devlink_eswitch_mode nfp_abm_eswitch_mode_get(struct nfp_app *app)
{
struct nfp_abm *abm = app->priv;
return abm->eswitch_mode;
}
static int nfp_abm_eswitch_set_legacy(struct nfp_abm *abm)
{
nfp_abm_kill_reprs_all(abm);
nfp_abm_ctrl_qm_disable(abm);
abm->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY;
return 0;
}
static void nfp_abm_eswitch_clean_up(struct nfp_abm *abm)
{
if (abm->eswitch_mode != DEVLINK_ESWITCH_MODE_LEGACY)
WARN_ON(nfp_abm_eswitch_set_legacy(abm));
}
static int nfp_abm_eswitch_set_switchdev(struct nfp_abm *abm)
{
struct nfp_app *app = abm->app;
struct nfp_pf *pf = app->pf;
struct nfp_net *nn;
int err;
if (!abm->red_support)
return -EOPNOTSUPP;
err = nfp_abm_ctrl_qm_enable(abm);
if (err)
return err;
list_for_each_entry(nn, &pf->vnics, vnic_list) {
struct nfp_abm_link *alink = nn->app_priv;
err = nfp_abm_spawn_repr(app, alink, NFP_PORT_PHYS_PORT);
if (err)
goto err_kill_all_reprs;
err = nfp_abm_spawn_repr(app, alink, NFP_PORT_PF_PORT);
if (err)
goto err_kill_all_reprs;
}
abm->eswitch_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
return 0;
err_kill_all_reprs:
nfp_abm_kill_reprs_all(abm);
nfp_abm_ctrl_qm_disable(abm);
return err;
}
static int nfp_abm_eswitch_mode_set(struct nfp_app *app, u16 mode)
{
struct nfp_abm *abm = app->priv;
if (abm->eswitch_mode == mode)
return 0;
switch (mode) {
case DEVLINK_ESWITCH_MODE_LEGACY:
return nfp_abm_eswitch_set_legacy(abm);
case DEVLINK_ESWITCH_MODE_SWITCHDEV:
return nfp_abm_eswitch_set_switchdev(abm);
default:
return -EINVAL;
}
}
static void
nfp_abm_vnic_set_mac(struct nfp_pf *pf, struct nfp_abm *abm, struct nfp_net *nn,
unsigned int id)
{
struct nfp_eth_table_port *eth_port = &pf->eth_tbl->ports[id];
u8 mac_addr[ETH_ALEN];
struct nfp_nsp *nsp;
char hwinfo[32];
int err;
if (id > pf->eth_tbl->count) {
nfp_warn(pf->cpp, "No entry for persistent MAC address\n");
eth_hw_addr_random(nn->dp.netdev);
return;
}
snprintf(hwinfo, sizeof(hwinfo), "eth%u.mac.pf%u",
eth_port->eth_index, abm->pf_id);
nsp = nfp_nsp_open(pf->cpp);
if (IS_ERR(nsp)) {
nfp_warn(pf->cpp, "Failed to access the NSP for persistent MAC address: %ld\n",
PTR_ERR(nsp));
eth_hw_addr_random(nn->dp.netdev);
return;
}
if (!nfp_nsp_has_hwinfo_lookup(nsp)) {
nfp_warn(pf->cpp, "NSP doesn't support PF MAC generation\n");
eth_hw_addr_random(nn->dp.netdev);
return;
}
err = nfp_nsp_hwinfo_lookup(nsp, hwinfo, sizeof(hwinfo));
nfp_nsp_close(nsp);
if (err) {
nfp_warn(pf->cpp, "Reading persistent MAC address failed: %d\n",
err);
eth_hw_addr_random(nn->dp.netdev);
return;
}
if (sscanf(hwinfo, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
&mac_addr[0], &mac_addr[1], &mac_addr[2],
&mac_addr[3], &mac_addr[4], &mac_addr[5]) != 6) {
nfp_warn(pf->cpp, "Can't parse persistent MAC address (%s)\n",
hwinfo);
eth_hw_addr_random(nn->dp.netdev);
return;
}
ether_addr_copy(nn->dp.netdev->dev_addr, mac_addr);
ether_addr_copy(nn->dp.netdev->perm_addr, mac_addr);
}
static int
nfp_abm_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
{
struct nfp_eth_table_port *eth_port = &app->pf->eth_tbl->ports[id];
struct nfp_abm *abm = app->priv;
struct nfp_abm_link *alink;
int err;
alink = kzalloc(sizeof(*alink), GFP_KERNEL);
if (!alink)
return -ENOMEM;
nn->app_priv = alink;
alink->abm = abm;
alink->vnic = nn;
alink->id = id;
alink->total_queues = alink->vnic->max_rx_rings;
INIT_LIST_HEAD(&alink->dscp_map);
err = nfp_abm_ctrl_read_params(alink);
if (err)
goto err_free_alink;
alink->prio_map = kzalloc(abm->prio_map_len, GFP_KERNEL);
if (!alink->prio_map)
goto err_free_alink;
/* This is a multi-host app, make sure MAC/PHY is up, but don't
* make the MAC/PHY state follow the state of any of the ports.
*/
err = nfp_eth_set_configured(app->cpp, eth_port->index, true);
if (err < 0)
goto err_free_priomap;
netif_keep_dst(nn->dp.netdev);
nfp_abm_vnic_set_mac(app->pf, abm, nn, id);
INIT_RADIX_TREE(&alink->qdiscs, GFP_KERNEL);
return 0;
err_free_priomap:
kfree(alink->prio_map);
err_free_alink:
kfree(alink);
return err;
}
static void nfp_abm_vnic_free(struct nfp_app *app, struct nfp_net *nn)
{
struct nfp_abm_link *alink = nn->app_priv;
nfp_abm_kill_reprs(alink->abm, alink);
WARN(!radix_tree_empty(&alink->qdiscs), "left over qdiscs\n");
kfree(alink->prio_map);
kfree(alink);
}
static int nfp_abm_vnic_init(struct nfp_app *app, struct nfp_net *nn)
{
struct nfp_abm_link *alink = nn->app_priv;
if (nfp_abm_has_prio(alink->abm))
return nfp_abm_ctrl_prio_map_update(alink, alink->prio_map);
return 0;
}
static u64 *
nfp_abm_port_get_stats(struct nfp_app *app, struct nfp_port *port, u64 *data)
{
struct nfp_repr *repr = netdev_priv(port->netdev);
struct nfp_abm_link *alink;
unsigned int i;
if (port->type != NFP_PORT_PF_PORT)
return data;
alink = repr->app_priv;
for (i = 0; i < alink->vnic->dp.num_r_vecs; i++) {
*data++ = nfp_abm_ctrl_stat_non_sto(alink, i);
*data++ = nfp_abm_ctrl_stat_sto(alink, i);
}
return data;
}
static int
nfp_abm_port_get_stats_count(struct nfp_app *app, struct nfp_port *port)
{
struct nfp_repr *repr = netdev_priv(port->netdev);
struct nfp_abm_link *alink;
if (port->type != NFP_PORT_PF_PORT)
return 0;
alink = repr->app_priv;
return alink->vnic->dp.num_r_vecs * 2;
}
static u8 *
nfp_abm_port_get_stats_strings(struct nfp_app *app, struct nfp_port *port,
u8 *data)
{
struct nfp_repr *repr = netdev_priv(port->netdev);
struct nfp_abm_link *alink;
unsigned int i;
if (port->type != NFP_PORT_PF_PORT)
return data;
alink = repr->app_priv;
for (i = 0; i < alink->vnic->dp.num_r_vecs; i++) {
data = nfp_pr_et(data, "q%u_no_wait", i);
data = nfp_pr_et(data, "q%u_delayed", i);
}
return data;
}
static int nfp_abm_fw_init_reset(struct nfp_abm *abm)
{
unsigned int i;
if (!abm->red_support)
return 0;
for (i = 0; i < abm->num_bands * NFP_NET_MAX_RX_RINGS; i++) {
__nfp_abm_ctrl_set_q_lvl(abm, i, NFP_ABM_LVL_INFINITY);
__nfp_abm_ctrl_set_q_act(abm, i, NFP_ABM_ACT_DROP);
}
return nfp_abm_ctrl_qm_disable(abm);
}
static int nfp_abm_init(struct nfp_app *app)
{
struct nfp_pf *pf = app->pf;
struct nfp_reprs *reprs;
struct nfp_abm *abm;
int err;
if (!pf->eth_tbl) {
nfp_err(pf->cpp, "ABM NIC requires ETH table\n");
return -EINVAL;
}
if (pf->max_data_vnics != pf->eth_tbl->count) {
nfp_err(pf->cpp, "ETH entries don't match vNICs (%d vs %d)\n",
pf->max_data_vnics, pf->eth_tbl->count);
return -EINVAL;
}
if (!pf->mac_stats_bar) {
nfp_warn(app->cpp, "ABM NIC requires mac_stats symbol\n");
return -EINVAL;
}
abm = kzalloc(sizeof(*abm), GFP_KERNEL);
if (!abm)
return -ENOMEM;
app->priv = abm;
abm->app = app;
err = nfp_abm_ctrl_find_addrs(abm);
if (err)
goto err_free_abm;
err = -ENOMEM;
abm->num_thresholds = array_size(abm->num_bands, NFP_NET_MAX_RX_RINGS);
abm->threshold_undef = bitmap_zalloc(abm->num_thresholds, GFP_KERNEL);
if (!abm->threshold_undef)
goto err_free_abm;
abm->thresholds = kvcalloc(abm->num_thresholds,
sizeof(*abm->thresholds), GFP_KERNEL);
if (!abm->thresholds)
goto err_free_thresh_umap;
abm->actions = kvcalloc(abm->num_thresholds, sizeof(*abm->actions),
GFP_KERNEL);
if (!abm->actions)
goto err_free_thresh;
/* We start in legacy mode, make sure advanced queuing is disabled */
err = nfp_abm_fw_init_reset(abm);
if (err)
goto err_free_act;
err = -ENOMEM;
reprs = nfp_reprs_alloc(pf->max_data_vnics);
if (!reprs)
goto err_free_act;
RCU_INIT_POINTER(app->reprs[NFP_REPR_TYPE_PHYS_PORT], reprs);
reprs = nfp_reprs_alloc(pf->max_data_vnics);
if (!reprs)
goto err_free_phys;
RCU_INIT_POINTER(app->reprs[NFP_REPR_TYPE_PF], reprs);
return 0;
err_free_phys:
nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PHYS_PORT);
err_free_act:
kvfree(abm->actions);
err_free_thresh:
kvfree(abm->thresholds);
err_free_thresh_umap:
bitmap_free(abm->threshold_undef);
err_free_abm:
kfree(abm);
app->priv = NULL;
return err;
}
static void nfp_abm_clean(struct nfp_app *app)
{
struct nfp_abm *abm = app->priv;
nfp_abm_eswitch_clean_up(abm);
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);
bitmap_free(abm->threshold_undef);
kvfree(abm->actions);
kvfree(abm->thresholds);
kfree(abm);
app->priv = NULL;
}
const struct nfp_app_type app_abm = {
.id = NFP_APP_ACTIVE_BUFFER_MGMT_NIC,
.name = "abm",
.init = nfp_abm_init,
.clean = nfp_abm_clean,
.vnic_alloc = nfp_abm_vnic_alloc,
.vnic_free = nfp_abm_vnic_free,
.vnic_init = nfp_abm_vnic_init,
.port_get_stats = nfp_abm_port_get_stats,
.port_get_stats_count = nfp_abm_port_get_stats_count,
.port_get_stats_strings = nfp_abm_port_get_stats_strings,
.setup_tc = nfp_abm_setup_tc,
.eswitch_mode_get = nfp_abm_eswitch_mode_get,
.eswitch_mode_set = nfp_abm_eswitch_mode_set,
.dev_get = nfp_abm_repr_get,
};