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|
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
// Copyright (c) 2020 Mellanox Technologies
#include "en/ptp.h"
#include "en/txrx.h"
#include "en/params.h"
#include "en/fs_tt_redirect.h"
#include <linux/list.h>
#include <linux/spinlock.h>
struct mlx5e_ptp_fs {
struct mlx5_flow_handle *l2_rule;
struct mlx5_flow_handle *udp_v4_rule;
struct mlx5_flow_handle *udp_v6_rule;
bool valid;
};
struct mlx5e_ptp_params {
struct mlx5e_params params;
struct mlx5e_sq_param txq_sq_param;
struct mlx5e_rq_param rq_param;
};
struct mlx5e_ptp_port_ts_cqe_tracker {
u8 metadata_id;
bool inuse : 1;
struct list_head entry;
};
struct mlx5e_ptp_port_ts_cqe_list {
struct mlx5e_ptp_port_ts_cqe_tracker *nodes;
struct list_head tracker_list_head;
/* Sync list operations in xmit and napi_poll contexts */
spinlock_t tracker_list_lock;
};
static inline void
mlx5e_ptp_port_ts_cqe_list_add(struct mlx5e_ptp_port_ts_cqe_list *list, u8 metadata)
{
struct mlx5e_ptp_port_ts_cqe_tracker *tracker = &list->nodes[metadata];
WARN_ON_ONCE(tracker->inuse);
tracker->inuse = true;
spin_lock(&list->tracker_list_lock);
list_add_tail(&tracker->entry, &list->tracker_list_head);
spin_unlock(&list->tracker_list_lock);
}
static void
mlx5e_ptp_port_ts_cqe_list_remove(struct mlx5e_ptp_port_ts_cqe_list *list, u8 metadata)
{
struct mlx5e_ptp_port_ts_cqe_tracker *tracker = &list->nodes[metadata];
WARN_ON_ONCE(!tracker->inuse);
tracker->inuse = false;
spin_lock(&list->tracker_list_lock);
list_del(&tracker->entry);
spin_unlock(&list->tracker_list_lock);
}
void mlx5e_ptpsq_track_metadata(struct mlx5e_ptpsq *ptpsq, u8 metadata)
{
mlx5e_ptp_port_ts_cqe_list_add(ptpsq->ts_cqe_pending_list, metadata);
}
struct mlx5e_skb_cb_hwtstamp {
ktime_t cqe_hwtstamp;
ktime_t port_hwtstamp;
};
void mlx5e_skb_cb_hwtstamp_init(struct sk_buff *skb)
{
memset(skb->cb, 0, sizeof(struct mlx5e_skb_cb_hwtstamp));
}
static struct mlx5e_skb_cb_hwtstamp *mlx5e_skb_cb_get_hwts(struct sk_buff *skb)
{
BUILD_BUG_ON(sizeof(struct mlx5e_skb_cb_hwtstamp) > sizeof(skb->cb));
return (struct mlx5e_skb_cb_hwtstamp *)skb->cb;
}
static void mlx5e_skb_cb_hwtstamp_tx(struct sk_buff *skb,
struct mlx5e_ptp_cq_stats *cq_stats)
{
struct skb_shared_hwtstamps hwts = {};
ktime_t diff;
diff = abs(mlx5e_skb_cb_get_hwts(skb)->port_hwtstamp -
mlx5e_skb_cb_get_hwts(skb)->cqe_hwtstamp);
/* Maximal allowed diff is 1 / 128 second */
if (diff > (NSEC_PER_SEC >> 7)) {
cq_stats->abort++;
cq_stats->abort_abs_diff_ns += diff;
return;
}
hwts.hwtstamp = mlx5e_skb_cb_get_hwts(skb)->port_hwtstamp;
skb_tstamp_tx(skb, &hwts);
}
void mlx5e_skb_cb_hwtstamp_handler(struct sk_buff *skb, int hwtstamp_type,
ktime_t hwtstamp,
struct mlx5e_ptp_cq_stats *cq_stats)
{
switch (hwtstamp_type) {
case (MLX5E_SKB_CB_CQE_HWTSTAMP):
mlx5e_skb_cb_get_hwts(skb)->cqe_hwtstamp = hwtstamp;
break;
case (MLX5E_SKB_CB_PORT_HWTSTAMP):
mlx5e_skb_cb_get_hwts(skb)->port_hwtstamp = hwtstamp;
break;
}
/* If both CQEs arrive, check and report the port tstamp, and clear skb cb as
* skb soon to be released.
*/
if (!mlx5e_skb_cb_get_hwts(skb)->cqe_hwtstamp ||
!mlx5e_skb_cb_get_hwts(skb)->port_hwtstamp)
return;
mlx5e_skb_cb_hwtstamp_tx(skb, cq_stats);
memset(skb->cb, 0, sizeof(struct mlx5e_skb_cb_hwtstamp));
}
static struct sk_buff *
mlx5e_ptp_metadata_map_lookup(struct mlx5e_ptp_metadata_map *map, u16 metadata)
{
return map->data[metadata];
}
static struct sk_buff *
mlx5e_ptp_metadata_map_remove(struct mlx5e_ptp_metadata_map *map, u16 metadata)
{
struct sk_buff *skb;
skb = map->data[metadata];
map->data[metadata] = NULL;
return skb;
}
static void mlx5e_ptpsq_mark_ts_cqes_undelivered(struct mlx5e_ptpsq *ptpsq,
ktime_t port_tstamp)
{
struct mlx5e_ptp_port_ts_cqe_list *cqe_list = ptpsq->ts_cqe_pending_list;
ktime_t timeout = ns_to_ktime(MLX5E_PTP_TS_CQE_UNDELIVERED_TIMEOUT);
struct mlx5e_ptp_metadata_map *metadata_map = &ptpsq->metadata_map;
struct mlx5e_ptp_port_ts_cqe_tracker *pos, *n;
spin_lock(&cqe_list->tracker_list_lock);
list_for_each_entry_safe(pos, n, &cqe_list->tracker_list_head, entry) {
struct sk_buff *skb =
mlx5e_ptp_metadata_map_lookup(metadata_map, pos->metadata_id);
ktime_t dma_tstamp = mlx5e_skb_cb_get_hwts(skb)->cqe_hwtstamp;
if (!dma_tstamp ||
ktime_after(ktime_add(dma_tstamp, timeout), port_tstamp))
break;
metadata_map->undelivered_counter++;
WARN_ON_ONCE(!pos->inuse);
pos->inuse = false;
list_del(&pos->entry);
}
spin_unlock(&cqe_list->tracker_list_lock);
}
#define PTP_WQE_CTR2IDX(val) ((val) & ptpsq->ts_cqe_ctr_mask)
static void mlx5e_ptp_handle_ts_cqe(struct mlx5e_ptpsq *ptpsq,
struct mlx5_cqe64 *cqe,
int budget)
{
struct mlx5e_ptp_port_ts_cqe_list *pending_cqe_list = ptpsq->ts_cqe_pending_list;
u8 metadata_id = PTP_WQE_CTR2IDX(be16_to_cpu(cqe->wqe_counter));
bool is_err_cqe = !!MLX5E_RX_ERR_CQE(cqe);
struct mlx5e_txqsq *sq = &ptpsq->txqsq;
struct sk_buff *skb;
ktime_t hwtstamp;
if (likely(pending_cqe_list->nodes[metadata_id].inuse)) {
mlx5e_ptp_port_ts_cqe_list_remove(pending_cqe_list, metadata_id);
} else {
/* Reclaim space in the unlikely event CQE was delivered after
* marking it late.
*/
ptpsq->metadata_map.undelivered_counter--;
ptpsq->cq_stats->late_cqe++;
}
skb = mlx5e_ptp_metadata_map_remove(&ptpsq->metadata_map, metadata_id);
if (unlikely(is_err_cqe)) {
ptpsq->cq_stats->err_cqe++;
goto out;
}
hwtstamp = mlx5e_cqe_ts_to_ns(sq->ptp_cyc2time, sq->clock, get_cqe_ts(cqe));
mlx5e_skb_cb_hwtstamp_handler(skb, MLX5E_SKB_CB_PORT_HWTSTAMP,
hwtstamp, ptpsq->cq_stats);
ptpsq->cq_stats->cqe++;
mlx5e_ptpsq_mark_ts_cqes_undelivered(ptpsq, hwtstamp);
out:
napi_consume_skb(skb, budget);
mlx5e_ptp_metadata_fifo_push(&ptpsq->metadata_freelist, metadata_id);
}
static bool mlx5e_ptp_poll_ts_cq(struct mlx5e_cq *cq, int budget)
{
struct mlx5e_ptpsq *ptpsq = container_of(cq, struct mlx5e_ptpsq, ts_cq);
struct mlx5_cqwq *cqwq = &cq->wq;
struct mlx5_cqe64 *cqe;
int work_done = 0;
if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &ptpsq->txqsq.state)))
return false;
cqe = mlx5_cqwq_get_cqe(cqwq);
if (!cqe)
return false;
do {
mlx5_cqwq_pop(cqwq);
mlx5e_ptp_handle_ts_cqe(ptpsq, cqe, budget);
} while ((++work_done < budget) && (cqe = mlx5_cqwq_get_cqe(cqwq)));
mlx5_cqwq_update_db_record(cqwq);
/* ensure cq space is freed before enabling more cqes */
wmb();
mlx5e_txqsq_wake(&ptpsq->txqsq);
return work_done == budget;
}
static int mlx5e_ptp_napi_poll(struct napi_struct *napi, int budget)
{
struct mlx5e_ptp *c = container_of(napi, struct mlx5e_ptp, napi);
struct mlx5e_ch_stats *ch_stats = c->stats;
struct mlx5e_rq *rq = &c->rq;
bool busy = false;
int work_done = 0;
int i;
rcu_read_lock();
ch_stats->poll++;
if (test_bit(MLX5E_PTP_STATE_TX, c->state)) {
for (i = 0; i < c->num_tc; i++) {
busy |= mlx5e_poll_tx_cq(&c->ptpsq[i].txqsq.cq, budget);
busy |= mlx5e_ptp_poll_ts_cq(&c->ptpsq[i].ts_cq, budget);
}
}
if (test_bit(MLX5E_PTP_STATE_RX, c->state) && likely(budget)) {
work_done = mlx5e_poll_rx_cq(&rq->cq, budget);
busy |= work_done == budget;
busy |= INDIRECT_CALL_2(rq->post_wqes,
mlx5e_post_rx_mpwqes,
mlx5e_post_rx_wqes,
rq);
}
if (busy) {
work_done = budget;
goto out;
}
if (unlikely(!napi_complete_done(napi, work_done)))
goto out;
ch_stats->arm++;
if (test_bit(MLX5E_PTP_STATE_TX, c->state)) {
for (i = 0; i < c->num_tc; i++) {
mlx5e_cq_arm(&c->ptpsq[i].txqsq.cq);
mlx5e_cq_arm(&c->ptpsq[i].ts_cq);
}
}
if (test_bit(MLX5E_PTP_STATE_RX, c->state))
mlx5e_cq_arm(&rq->cq);
out:
rcu_read_unlock();
return work_done;
}
static int mlx5e_ptp_alloc_txqsq(struct mlx5e_ptp *c, int txq_ix,
struct mlx5e_params *params,
struct mlx5e_sq_param *param,
struct mlx5e_txqsq *sq, int tc,
struct mlx5e_ptpsq *ptpsq)
{
void *sqc_wq = MLX5_ADDR_OF(sqc, param->sqc, wq);
struct mlx5_core_dev *mdev = c->mdev;
struct mlx5_wq_cyc *wq = &sq->wq;
int err;
int node;
sq->pdev = c->pdev;
sq->clock = &mdev->clock;
sq->mkey_be = c->mkey_be;
sq->netdev = c->netdev;
sq->priv = c->priv;
sq->mdev = mdev;
sq->ch_ix = MLX5E_PTP_CHANNEL_IX;
sq->txq_ix = txq_ix;
sq->uar_map = mdev->mlx5e_res.hw_objs.bfreg.map;
sq->min_inline_mode = params->tx_min_inline_mode;
sq->hw_mtu = MLX5E_SW2HW_MTU(params, params->sw_mtu);
sq->stats = &c->priv->ptp_stats.sq[tc];
sq->ptpsq = ptpsq;
INIT_WORK(&sq->recover_work, mlx5e_tx_err_cqe_work);
if (!MLX5_CAP_ETH(mdev, wqe_vlan_insert))
set_bit(MLX5E_SQ_STATE_VLAN_NEED_L2_INLINE, &sq->state);
sq->stop_room = param->stop_room;
sq->ptp_cyc2time = mlx5_sq_ts_translator(mdev);
node = dev_to_node(mlx5_core_dma_dev(mdev));
param->wq.db_numa_node = node;
err = mlx5_wq_cyc_create(mdev, ¶m->wq, sqc_wq, wq, &sq->wq_ctrl);
if (err)
return err;
wq->db = &wq->db[MLX5_SND_DBR];
err = mlx5e_alloc_txqsq_db(sq, node);
if (err)
goto err_sq_wq_destroy;
return 0;
err_sq_wq_destroy:
mlx5_wq_destroy(&sq->wq_ctrl);
return err;
}
static void mlx5e_ptp_destroy_sq(struct mlx5_core_dev *mdev, u32 sqn)
{
mlx5_core_destroy_sq(mdev, sqn);
}
static int mlx5e_ptp_alloc_traffic_db(struct mlx5e_ptpsq *ptpsq, int numa)
{
struct mlx5e_ptp_metadata_fifo *metadata_freelist = &ptpsq->metadata_freelist;
struct mlx5e_ptp_metadata_map *metadata_map = &ptpsq->metadata_map;
struct mlx5e_ptp_port_ts_cqe_list *cqe_list;
int db_sz;
int md;
cqe_list = kvzalloc_node(sizeof(*ptpsq->ts_cqe_pending_list), GFP_KERNEL, numa);
if (!cqe_list)
return -ENOMEM;
ptpsq->ts_cqe_pending_list = cqe_list;
db_sz = min_t(u32, mlx5_wq_cyc_get_size(&ptpsq->txqsq.wq),
1 << MLX5_CAP_GEN_2(ptpsq->txqsq.mdev,
ts_cqe_metadata_size2wqe_counter));
ptpsq->ts_cqe_ctr_mask = db_sz - 1;
cqe_list->nodes = kvzalloc_node(array_size(db_sz, sizeof(*cqe_list->nodes)),
GFP_KERNEL, numa);
if (!cqe_list->nodes)
goto free_cqe_list;
INIT_LIST_HEAD(&cqe_list->tracker_list_head);
spin_lock_init(&cqe_list->tracker_list_lock);
metadata_freelist->data =
kvzalloc_node(array_size(db_sz, sizeof(*metadata_freelist->data)),
GFP_KERNEL, numa);
if (!metadata_freelist->data)
goto free_cqe_list_nodes;
metadata_freelist->mask = ptpsq->ts_cqe_ctr_mask;
for (md = 0; md < db_sz; ++md) {
cqe_list->nodes[md].metadata_id = md;
metadata_freelist->data[md] = md;
}
metadata_freelist->pc = db_sz;
metadata_map->data =
kvzalloc_node(array_size(db_sz, sizeof(*metadata_map->data)),
GFP_KERNEL, numa);
if (!metadata_map->data)
goto free_metadata_freelist;
metadata_map->capacity = db_sz;
return 0;
free_metadata_freelist:
kvfree(metadata_freelist->data);
free_cqe_list_nodes:
kvfree(cqe_list->nodes);
free_cqe_list:
kvfree(cqe_list);
return -ENOMEM;
}
static void mlx5e_ptp_drain_metadata_map(struct mlx5e_ptp_metadata_map *map)
{
int idx;
for (idx = 0; idx < map->capacity; ++idx) {
struct sk_buff *skb = map->data[idx];
dev_kfree_skb_any(skb);
}
}
static void mlx5e_ptp_free_traffic_db(struct mlx5e_ptpsq *ptpsq)
{
mlx5e_ptp_drain_metadata_map(&ptpsq->metadata_map);
kvfree(ptpsq->metadata_map.data);
kvfree(ptpsq->metadata_freelist.data);
kvfree(ptpsq->ts_cqe_pending_list->nodes);
kvfree(ptpsq->ts_cqe_pending_list);
}
static int mlx5e_ptp_open_txqsq(struct mlx5e_ptp *c, u32 tisn,
int txq_ix, struct mlx5e_ptp_params *cparams,
int tc, struct mlx5e_ptpsq *ptpsq)
{
struct mlx5e_sq_param *sqp = &cparams->txq_sq_param;
struct mlx5e_txqsq *txqsq = &ptpsq->txqsq;
struct mlx5e_create_sq_param csp = {};
int err;
err = mlx5e_ptp_alloc_txqsq(c, txq_ix, &cparams->params, sqp,
txqsq, tc, ptpsq);
if (err)
return err;
csp.tisn = tisn;
csp.tis_lst_sz = 1;
csp.cqn = txqsq->cq.mcq.cqn;
csp.wq_ctrl = &txqsq->wq_ctrl;
csp.min_inline_mode = txqsq->min_inline_mode;
csp.ts_cqe_to_dest_cqn = ptpsq->ts_cq.mcq.cqn;
err = mlx5e_create_sq_rdy(c->mdev, sqp, &csp, 0, &txqsq->sqn);
if (err)
goto err_free_txqsq;
err = mlx5e_ptp_alloc_traffic_db(ptpsq, dev_to_node(mlx5_core_dma_dev(c->mdev)));
if (err)
goto err_free_txqsq;
return 0;
err_free_txqsq:
mlx5e_free_txqsq(txqsq);
return err;
}
static void mlx5e_ptp_close_txqsq(struct mlx5e_ptpsq *ptpsq)
{
struct mlx5e_txqsq *sq = &ptpsq->txqsq;
struct mlx5_core_dev *mdev = sq->mdev;
mlx5e_ptp_free_traffic_db(ptpsq);
cancel_work_sync(&sq->recover_work);
mlx5e_ptp_destroy_sq(mdev, sq->sqn);
mlx5e_free_txqsq_descs(sq);
mlx5e_free_txqsq(sq);
}
static int mlx5e_ptp_open_txqsqs(struct mlx5e_ptp *c,
struct mlx5e_ptp_params *cparams)
{
struct mlx5e_params *params = &cparams->params;
u8 num_tc = mlx5e_get_dcb_num_tc(params);
int ix_base;
int err;
int tc;
ix_base = num_tc * params->num_channels;
for (tc = 0; tc < num_tc; tc++) {
int txq_ix = ix_base + tc;
err = mlx5e_ptp_open_txqsq(c, c->priv->tisn[c->lag_port][tc], txq_ix,
cparams, tc, &c->ptpsq[tc]);
if (err)
goto close_txqsq;
}
return 0;
close_txqsq:
for (--tc; tc >= 0; tc--)
mlx5e_ptp_close_txqsq(&c->ptpsq[tc]);
return err;
}
static void mlx5e_ptp_close_txqsqs(struct mlx5e_ptp *c)
{
int tc;
for (tc = 0; tc < c->num_tc; tc++)
mlx5e_ptp_close_txqsq(&c->ptpsq[tc]);
}
static int mlx5e_ptp_open_tx_cqs(struct mlx5e_ptp *c,
struct mlx5e_ptp_params *cparams)
{
struct mlx5e_params *params = &cparams->params;
struct mlx5e_create_cq_param ccp = {};
struct dim_cq_moder ptp_moder = {};
struct mlx5e_cq_param *cq_param;
u8 num_tc;
int err;
int tc;
num_tc = mlx5e_get_dcb_num_tc(params);
ccp.node = dev_to_node(mlx5_core_dma_dev(c->mdev));
ccp.ch_stats = c->stats;
ccp.napi = &c->napi;
ccp.ix = MLX5E_PTP_CHANNEL_IX;
cq_param = &cparams->txq_sq_param.cqp;
for (tc = 0; tc < num_tc; tc++) {
struct mlx5e_cq *cq = &c->ptpsq[tc].txqsq.cq;
err = mlx5e_open_cq(c->priv, ptp_moder, cq_param, &ccp, cq);
if (err)
goto out_err_txqsq_cq;
}
for (tc = 0; tc < num_tc; tc++) {
struct mlx5e_cq *cq = &c->ptpsq[tc].ts_cq;
struct mlx5e_ptpsq *ptpsq = &c->ptpsq[tc];
err = mlx5e_open_cq(c->priv, ptp_moder, cq_param, &ccp, cq);
if (err)
goto out_err_ts_cq;
ptpsq->cq_stats = &c->priv->ptp_stats.cq[tc];
}
return 0;
out_err_ts_cq:
for (--tc; tc >= 0; tc--)
mlx5e_close_cq(&c->ptpsq[tc].ts_cq);
tc = num_tc;
out_err_txqsq_cq:
for (--tc; tc >= 0; tc--)
mlx5e_close_cq(&c->ptpsq[tc].txqsq.cq);
return err;
}
static int mlx5e_ptp_open_rx_cq(struct mlx5e_ptp *c,
struct mlx5e_ptp_params *cparams)
{
struct mlx5e_create_cq_param ccp = {};
struct dim_cq_moder ptp_moder = {};
struct mlx5e_cq_param *cq_param;
struct mlx5e_cq *cq = &c->rq.cq;
ccp.node = dev_to_node(mlx5_core_dma_dev(c->mdev));
ccp.ch_stats = c->stats;
ccp.napi = &c->napi;
ccp.ix = MLX5E_PTP_CHANNEL_IX;
cq_param = &cparams->rq_param.cqp;
return mlx5e_open_cq(c->priv, ptp_moder, cq_param, &ccp, cq);
}
static void mlx5e_ptp_close_tx_cqs(struct mlx5e_ptp *c)
{
int tc;
for (tc = 0; tc < c->num_tc; tc++)
mlx5e_close_cq(&c->ptpsq[tc].ts_cq);
for (tc = 0; tc < c->num_tc; tc++)
mlx5e_close_cq(&c->ptpsq[tc].txqsq.cq);
}
static void mlx5e_ptp_build_sq_param(struct mlx5_core_dev *mdev,
struct mlx5e_params *params,
struct mlx5e_sq_param *param)
{
void *sqc = param->sqc;
void *wq;
mlx5e_build_sq_param_common(mdev, param);
wq = MLX5_ADDR_OF(sqc, sqc, wq);
MLX5_SET(wq, wq, log_wq_sz, params->log_sq_size);
param->stop_room = mlx5e_stop_room_for_max_wqe(mdev);
mlx5e_build_tx_cq_param(mdev, params, ¶m->cqp);
}
static void mlx5e_ptp_build_rq_param(struct mlx5_core_dev *mdev,
struct net_device *netdev,
u16 q_counter,
struct mlx5e_ptp_params *ptp_params)
{
struct mlx5e_rq_param *rq_params = &ptp_params->rq_param;
struct mlx5e_params *params = &ptp_params->params;
params->rq_wq_type = MLX5_WQ_TYPE_CYCLIC;
mlx5e_init_rq_type_params(mdev, params);
params->sw_mtu = netdev->max_mtu;
mlx5e_build_rq_param(mdev, params, NULL, q_counter, rq_params);
}
static void mlx5e_ptp_build_params(struct mlx5e_ptp *c,
struct mlx5e_ptp_params *cparams,
struct mlx5e_params *orig)
{
struct mlx5e_params *params = &cparams->params;
params->tx_min_inline_mode = orig->tx_min_inline_mode;
params->num_channels = orig->num_channels;
params->hard_mtu = orig->hard_mtu;
params->sw_mtu = orig->sw_mtu;
params->mqprio = orig->mqprio;
/* SQ */
if (test_bit(MLX5E_PTP_STATE_TX, c->state)) {
params->log_sq_size =
min(MLX5_CAP_GEN_2(c->mdev, ts_cqe_metadata_size2wqe_counter),
MLX5E_PTP_MAX_LOG_SQ_SIZE);
params->log_sq_size = min(params->log_sq_size, orig->log_sq_size);
mlx5e_ptp_build_sq_param(c->mdev, params, &cparams->txq_sq_param);
}
/* RQ */
if (test_bit(MLX5E_PTP_STATE_RX, c->state)) {
params->vlan_strip_disable = orig->vlan_strip_disable;
mlx5e_ptp_build_rq_param(c->mdev, c->netdev, c->priv->q_counter, cparams);
}
}
static int mlx5e_init_ptp_rq(struct mlx5e_ptp *c, struct mlx5e_params *params,
struct mlx5e_rq *rq)
{
struct mlx5_core_dev *mdev = c->mdev;
struct mlx5e_priv *priv = c->priv;
int err;
rq->wq_type = params->rq_wq_type;
rq->pdev = c->pdev;
rq->netdev = priv->netdev;
rq->priv = priv;
rq->clock = &mdev->clock;
rq->tstamp = &priv->tstamp;
rq->mdev = mdev;
rq->hw_mtu = MLX5E_SW2HW_MTU(params, params->sw_mtu);
rq->stats = &c->priv->ptp_stats.rq;
rq->ix = MLX5E_PTP_CHANNEL_IX;
rq->ptp_cyc2time = mlx5_rq_ts_translator(mdev);
err = mlx5e_rq_set_handlers(rq, params, false);
if (err)
return err;
return xdp_rxq_info_reg(&rq->xdp_rxq, rq->netdev, rq->ix, 0);
}
static int mlx5e_ptp_open_rq(struct mlx5e_ptp *c, struct mlx5e_params *params,
struct mlx5e_rq_param *rq_param)
{
int node = dev_to_node(c->mdev->device);
int err;
err = mlx5e_init_ptp_rq(c, params, &c->rq);
if (err)
return err;
return mlx5e_open_rq(params, rq_param, NULL, node, &c->rq);
}
static int mlx5e_ptp_open_queues(struct mlx5e_ptp *c,
struct mlx5e_ptp_params *cparams)
{
int err;
if (test_bit(MLX5E_PTP_STATE_TX, c->state)) {
err = mlx5e_ptp_open_tx_cqs(c, cparams);
if (err)
return err;
err = mlx5e_ptp_open_txqsqs(c, cparams);
if (err)
goto close_tx_cqs;
}
if (test_bit(MLX5E_PTP_STATE_RX, c->state)) {
err = mlx5e_ptp_open_rx_cq(c, cparams);
if (err)
goto close_txqsq;
err = mlx5e_ptp_open_rq(c, &cparams->params, &cparams->rq_param);
if (err)
goto close_rx_cq;
}
return 0;
close_rx_cq:
if (test_bit(MLX5E_PTP_STATE_RX, c->state))
mlx5e_close_cq(&c->rq.cq);
close_txqsq:
if (test_bit(MLX5E_PTP_STATE_TX, c->state))
mlx5e_ptp_close_txqsqs(c);
close_tx_cqs:
if (test_bit(MLX5E_PTP_STATE_TX, c->state))
mlx5e_ptp_close_tx_cqs(c);
return err;
}
static void mlx5e_ptp_close_queues(struct mlx5e_ptp *c)
{
if (test_bit(MLX5E_PTP_STATE_RX, c->state)) {
mlx5e_close_rq(&c->rq);
mlx5e_close_cq(&c->rq.cq);
}
if (test_bit(MLX5E_PTP_STATE_TX, c->state)) {
mlx5e_ptp_close_txqsqs(c);
mlx5e_ptp_close_tx_cqs(c);
}
}
static int mlx5e_ptp_set_state(struct mlx5e_ptp *c, struct mlx5e_params *params)
{
if (MLX5E_GET_PFLAG(params, MLX5E_PFLAG_TX_PORT_TS))
__set_bit(MLX5E_PTP_STATE_TX, c->state);
if (params->ptp_rx)
__set_bit(MLX5E_PTP_STATE_RX, c->state);
return bitmap_empty(c->state, MLX5E_PTP_STATE_NUM_STATES) ? -EINVAL : 0;
}
static void mlx5e_ptp_rx_unset_fs(struct mlx5e_flow_steering *fs)
{
struct mlx5e_ptp_fs *ptp_fs = mlx5e_fs_get_ptp(fs);
if (!ptp_fs->valid)
return;
mlx5e_fs_tt_redirect_del_rule(ptp_fs->l2_rule);
mlx5e_fs_tt_redirect_any_destroy(fs);
mlx5e_fs_tt_redirect_del_rule(ptp_fs->udp_v6_rule);
mlx5e_fs_tt_redirect_del_rule(ptp_fs->udp_v4_rule);
mlx5e_fs_tt_redirect_udp_destroy(fs);
ptp_fs->valid = false;
}
static int mlx5e_ptp_rx_set_fs(struct mlx5e_priv *priv)
{
u32 tirn = mlx5e_rx_res_get_tirn_ptp(priv->rx_res);
struct mlx5e_flow_steering *fs = priv->fs;
struct mlx5_flow_handle *rule;
struct mlx5e_ptp_fs *ptp_fs;
int err;
ptp_fs = mlx5e_fs_get_ptp(fs);
if (ptp_fs->valid)
return 0;
err = mlx5e_fs_tt_redirect_udp_create(fs);
if (err)
goto out_free;
rule = mlx5e_fs_tt_redirect_udp_add_rule(fs, MLX5_TT_IPV4_UDP,
tirn, PTP_EV_PORT);
if (IS_ERR(rule)) {
err = PTR_ERR(rule);
goto out_destroy_fs_udp;
}
ptp_fs->udp_v4_rule = rule;
rule = mlx5e_fs_tt_redirect_udp_add_rule(fs, MLX5_TT_IPV6_UDP,
tirn, PTP_EV_PORT);
if (IS_ERR(rule)) {
err = PTR_ERR(rule);
goto out_destroy_udp_v4_rule;
}
ptp_fs->udp_v6_rule = rule;
err = mlx5e_fs_tt_redirect_any_create(fs);
if (err)
goto out_destroy_udp_v6_rule;
rule = mlx5e_fs_tt_redirect_any_add_rule(fs, tirn, ETH_P_1588);
if (IS_ERR(rule)) {
err = PTR_ERR(rule);
goto out_destroy_fs_any;
}
ptp_fs->l2_rule = rule;
ptp_fs->valid = true;
return 0;
out_destroy_fs_any:
mlx5e_fs_tt_redirect_any_destroy(fs);
out_destroy_udp_v6_rule:
mlx5e_fs_tt_redirect_del_rule(ptp_fs->udp_v6_rule);
out_destroy_udp_v4_rule:
mlx5e_fs_tt_redirect_del_rule(ptp_fs->udp_v4_rule);
out_destroy_fs_udp:
mlx5e_fs_tt_redirect_udp_destroy(fs);
out_free:
return err;
}
int mlx5e_ptp_open(struct mlx5e_priv *priv, struct mlx5e_params *params,
u8 lag_port, struct mlx5e_ptp **cp)
{
struct net_device *netdev = priv->netdev;
struct mlx5_core_dev *mdev = priv->mdev;
struct mlx5e_ptp_params *cparams;
struct mlx5e_ptp *c;
int err;
c = kvzalloc_node(sizeof(*c), GFP_KERNEL, dev_to_node(mlx5_core_dma_dev(mdev)));
cparams = kvzalloc(sizeof(*cparams), GFP_KERNEL);
if (!c || !cparams) {
err = -ENOMEM;
goto err_free;
}
c->priv = priv;
c->mdev = priv->mdev;
c->tstamp = &priv->tstamp;
c->pdev = mlx5_core_dma_dev(priv->mdev);
c->netdev = priv->netdev;
c->mkey_be = cpu_to_be32(priv->mdev->mlx5e_res.hw_objs.mkey);
c->num_tc = mlx5e_get_dcb_num_tc(params);
c->stats = &priv->ptp_stats.ch;
c->lag_port = lag_port;
err = mlx5e_ptp_set_state(c, params);
if (err)
goto err_free;
netif_napi_add(netdev, &c->napi, mlx5e_ptp_napi_poll);
mlx5e_ptp_build_params(c, cparams, params);
err = mlx5e_ptp_open_queues(c, cparams);
if (unlikely(err))
goto err_napi_del;
if (test_bit(MLX5E_PTP_STATE_RX, c->state))
priv->rx_ptp_opened = true;
*cp = c;
kvfree(cparams);
return 0;
err_napi_del:
netif_napi_del(&c->napi);
err_free:
kvfree(cparams);
kvfree(c);
return err;
}
void mlx5e_ptp_close(struct mlx5e_ptp *c)
{
mlx5e_ptp_close_queues(c);
netif_napi_del(&c->napi);
kvfree(c);
}
void mlx5e_ptp_activate_channel(struct mlx5e_ptp *c)
{
int tc;
napi_enable(&c->napi);
if (test_bit(MLX5E_PTP_STATE_TX, c->state)) {
for (tc = 0; tc < c->num_tc; tc++)
mlx5e_activate_txqsq(&c->ptpsq[tc].txqsq);
}
if (test_bit(MLX5E_PTP_STATE_RX, c->state)) {
mlx5e_ptp_rx_set_fs(c->priv);
mlx5e_activate_rq(&c->rq);
}
mlx5e_trigger_napi_sched(&c->napi);
}
void mlx5e_ptp_deactivate_channel(struct mlx5e_ptp *c)
{
int tc;
if (test_bit(MLX5E_PTP_STATE_RX, c->state))
mlx5e_deactivate_rq(&c->rq);
if (test_bit(MLX5E_PTP_STATE_TX, c->state)) {
for (tc = 0; tc < c->num_tc; tc++)
mlx5e_deactivate_txqsq(&c->ptpsq[tc].txqsq);
}
napi_disable(&c->napi);
}
int mlx5e_ptp_get_rqn(struct mlx5e_ptp *c, u32 *rqn)
{
if (!c || !test_bit(MLX5E_PTP_STATE_RX, c->state))
return -EINVAL;
*rqn = c->rq.rqn;
return 0;
}
int mlx5e_ptp_alloc_rx_fs(struct mlx5e_flow_steering *fs,
const struct mlx5e_profile *profile)
{
struct mlx5e_ptp_fs *ptp_fs;
if (!mlx5e_profile_feature_cap(profile, PTP_RX))
return 0;
ptp_fs = kzalloc(sizeof(*ptp_fs), GFP_KERNEL);
if (!ptp_fs)
return -ENOMEM;
mlx5e_fs_set_ptp(fs, ptp_fs);
return 0;
}
void mlx5e_ptp_free_rx_fs(struct mlx5e_flow_steering *fs,
const struct mlx5e_profile *profile)
{
struct mlx5e_ptp_fs *ptp_fs = mlx5e_fs_get_ptp(fs);
if (!mlx5e_profile_feature_cap(profile, PTP_RX))
return;
mlx5e_ptp_rx_unset_fs(fs);
kfree(ptp_fs);
}
int mlx5e_ptp_rx_manage_fs(struct mlx5e_priv *priv, bool set)
{
struct mlx5e_ptp *c = priv->channels.ptp;
if (!mlx5e_profile_feature_cap(priv->profile, PTP_RX))
return 0;
if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
return 0;
if (set) {
if (!c || !test_bit(MLX5E_PTP_STATE_RX, c->state)) {
netdev_WARN_ONCE(priv->netdev, "Don't try to add PTP RX-FS rules");
return -EINVAL;
}
return mlx5e_ptp_rx_set_fs(priv);
}
/* set == false */
if (c && test_bit(MLX5E_PTP_STATE_RX, c->state)) {
netdev_WARN_ONCE(priv->netdev, "Don't try to remove PTP RX-FS rules");
return -EINVAL;
}
mlx5e_ptp_rx_unset_fs(priv->fs);
return 0;
}
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