diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c | 205 |
1 files changed, 122 insertions, 83 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c index 63b07edd9d81..ec2ff3d7f41c 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c @@ -29,7 +29,7 @@ struct mlxsw_sp_ptp_state { struct mlxsw_sp *mlxsw_sp; - struct rhashtable unmatched_ht; + struct rhltable unmatched_ht; spinlock_t unmatched_lock; /* protects the HT */ struct delayed_work ht_gc_dw; u32 gc_cycle; @@ -45,7 +45,7 @@ struct mlxsw_sp1_ptp_key { struct mlxsw_sp1_ptp_unmatched { struct mlxsw_sp1_ptp_key key; - struct rhash_head ht_node; + struct rhlist_head ht_node; struct rcu_head rcu; struct sk_buff *skb; u64 timestamp; @@ -359,7 +359,7 @@ static int mlxsw_sp_ptp_parse(struct sk_buff *skb, /* Returns NULL on successful insertion, a pointer on conflict, or an ERR_PTR on * error. */ -static struct mlxsw_sp1_ptp_unmatched * +static int mlxsw_sp1_ptp_unmatched_save(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp1_ptp_key key, struct sk_buff *skb, @@ -368,41 +368,51 @@ mlxsw_sp1_ptp_unmatched_save(struct mlxsw_sp *mlxsw_sp, int cycles = MLXSW_SP1_PTP_HT_GC_TIMEOUT / MLXSW_SP1_PTP_HT_GC_INTERVAL; struct mlxsw_sp_ptp_state *ptp_state = mlxsw_sp->ptp_state; struct mlxsw_sp1_ptp_unmatched *unmatched; - struct mlxsw_sp1_ptp_unmatched *conflict; + int err; unmatched = kzalloc(sizeof(*unmatched), GFP_ATOMIC); if (!unmatched) - return ERR_PTR(-ENOMEM); + return -ENOMEM; unmatched->key = key; unmatched->skb = skb; unmatched->timestamp = timestamp; unmatched->gc_cycle = mlxsw_sp->ptp_state->gc_cycle + cycles; - conflict = rhashtable_lookup_get_insert_fast(&ptp_state->unmatched_ht, - &unmatched->ht_node, - mlxsw_sp1_ptp_unmatched_ht_params); - if (conflict) + err = rhltable_insert(&ptp_state->unmatched_ht, &unmatched->ht_node, + mlxsw_sp1_ptp_unmatched_ht_params); + if (err) kfree(unmatched); - return conflict; + return err; } static struct mlxsw_sp1_ptp_unmatched * mlxsw_sp1_ptp_unmatched_lookup(struct mlxsw_sp *mlxsw_sp, - struct mlxsw_sp1_ptp_key key) + struct mlxsw_sp1_ptp_key key, int *p_length) { - return rhashtable_lookup(&mlxsw_sp->ptp_state->unmatched_ht, &key, - mlxsw_sp1_ptp_unmatched_ht_params); + struct mlxsw_sp1_ptp_unmatched *unmatched, *last = NULL; + struct rhlist_head *tmp, *list; + int length = 0; + + list = rhltable_lookup(&mlxsw_sp->ptp_state->unmatched_ht, &key, + mlxsw_sp1_ptp_unmatched_ht_params); + rhl_for_each_entry_rcu(unmatched, tmp, list, ht_node) { + last = unmatched; + length++; + } + + *p_length = length; + return last; } static int mlxsw_sp1_ptp_unmatched_remove(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp1_ptp_unmatched *unmatched) { - return rhashtable_remove_fast(&mlxsw_sp->ptp_state->unmatched_ht, - &unmatched->ht_node, - mlxsw_sp1_ptp_unmatched_ht_params); + return rhltable_remove(&mlxsw_sp->ptp_state->unmatched_ht, + &unmatched->ht_node, + mlxsw_sp1_ptp_unmatched_ht_params); } /* This function is called in the following scenarios: @@ -489,75 +499,38 @@ static void mlxsw_sp1_ptp_got_piece(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp1_ptp_key key, struct sk_buff *skb, u64 timestamp) { - struct mlxsw_sp1_ptp_unmatched *unmatched, *conflict; + struct mlxsw_sp1_ptp_unmatched *unmatched; + int length; int err; rcu_read_lock(); - unmatched = mlxsw_sp1_ptp_unmatched_lookup(mlxsw_sp, key); - spin_lock(&mlxsw_sp->ptp_state->unmatched_lock); - if (unmatched) { - /* There was an unmatched entry when we looked, but it may have - * been removed before we took the lock. - */ - err = mlxsw_sp1_ptp_unmatched_remove(mlxsw_sp, unmatched); - if (err) - unmatched = NULL; - } - - if (!unmatched) { - /* We have no unmatched entry, but one may have been added after - * we looked, but before we took the lock. - */ - unmatched = mlxsw_sp1_ptp_unmatched_save(mlxsw_sp, key, - skb, timestamp); - if (IS_ERR(unmatched)) { - if (skb) - mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb, - key.local_port, - key.ingress, NULL); - unmatched = NULL; - } else if (unmatched) { - /* Save just told us, under lock, that the entry is - * there, so this has to work. - */ - err = mlxsw_sp1_ptp_unmatched_remove(mlxsw_sp, - unmatched); - WARN_ON_ONCE(err); - } - } - - /* If unmatched is non-NULL here, it comes either from the lookup, or - * from the save attempt above. In either case the entry was removed - * from the hash table. If unmatched is NULL, a new unmatched entry was - * added to the hash table, and there was no conflict. - */ - + unmatched = mlxsw_sp1_ptp_unmatched_lookup(mlxsw_sp, key, &length); if (skb && unmatched && unmatched->timestamp) { unmatched->skb = skb; } else if (timestamp && unmatched && unmatched->skb) { unmatched->timestamp = timestamp; - } else if (unmatched) { - /* unmatched holds an older entry of the same type: either an - * skb if we are handling skb, or a timestamp if we are handling - * timestamp. We can't match that up, so save what we have. + } else { + /* Either there is no entry to match, or one that is there is + * incompatible. */ - conflict = mlxsw_sp1_ptp_unmatched_save(mlxsw_sp, key, - skb, timestamp); - if (IS_ERR(conflict)) { - if (skb) - mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb, - key.local_port, - key.ingress, NULL); - } else { - /* Above, we removed an object with this key from the - * hash table, under lock, so conflict can not be a - * valid pointer. - */ - WARN_ON_ONCE(conflict); - } + if (length < 100) + err = mlxsw_sp1_ptp_unmatched_save(mlxsw_sp, key, + skb, timestamp); + else + err = -E2BIG; + if (err && skb) + mlxsw_sp1_ptp_packet_finish(mlxsw_sp, skb, + key.local_port, + key.ingress, NULL); + unmatched = NULL; + } + + if (unmatched) { + err = mlxsw_sp1_ptp_unmatched_remove(mlxsw_sp, unmatched); + WARN_ON_ONCE(err); } spin_unlock(&mlxsw_sp->ptp_state->unmatched_lock); @@ -657,6 +630,8 @@ static void mlxsw_sp1_ptp_ht_gc_collect(struct mlxsw_sp_ptp_state *ptp_state, struct mlxsw_sp1_ptp_unmatched *unmatched) { + struct mlxsw_sp_ptp_port_dir_stats *stats; + struct mlxsw_sp_port *mlxsw_sp_port; int err; /* If an unmatched entry has an SKB, it has to be handed over to the @@ -669,15 +644,25 @@ mlxsw_sp1_ptp_ht_gc_collect(struct mlxsw_sp_ptp_state *ptp_state, local_bh_disable(); spin_lock(&ptp_state->unmatched_lock); - err = rhashtable_remove_fast(&ptp_state->unmatched_ht, - &unmatched->ht_node, - mlxsw_sp1_ptp_unmatched_ht_params); + err = rhltable_remove(&ptp_state->unmatched_ht, &unmatched->ht_node, + mlxsw_sp1_ptp_unmatched_ht_params); spin_unlock(&ptp_state->unmatched_lock); if (err) /* The packet was matched with timestamp during the walk. */ goto out; + mlxsw_sp_port = ptp_state->mlxsw_sp->ports[unmatched->key.local_port]; + if (mlxsw_sp_port) { + stats = unmatched->key.ingress ? + &mlxsw_sp_port->ptp.stats.rx_gcd : + &mlxsw_sp_port->ptp.stats.tx_gcd; + if (unmatched->skb) + stats->packets++; + else + stats->timestamps++; + } + /* mlxsw_sp1_ptp_unmatched_finish() invokes netif_receive_skb(). While * the comment at that function states that it can only be called in * soft IRQ context, this pattern of local_bh_disable() + @@ -702,7 +687,7 @@ static void mlxsw_sp1_ptp_ht_gc(struct work_struct *work) ptp_state = container_of(dwork, struct mlxsw_sp_ptp_state, ht_gc_dw); gc_cycle = ptp_state->gc_cycle++; - rhashtable_walk_enter(&ptp_state->unmatched_ht, &iter); + rhltable_walk_enter(&ptp_state->unmatched_ht, &iter); rhashtable_walk_start(&iter); while ((obj = rhashtable_walk_next(&iter))) { if (IS_ERR(obj)) @@ -855,8 +840,8 @@ struct mlxsw_sp_ptp_state *mlxsw_sp1_ptp_init(struct mlxsw_sp *mlxsw_sp) spin_lock_init(&ptp_state->unmatched_lock); - err = rhashtable_init(&ptp_state->unmatched_ht, - &mlxsw_sp1_ptp_unmatched_ht_params); + err = rhltable_init(&ptp_state->unmatched_ht, + &mlxsw_sp1_ptp_unmatched_ht_params); if (err) goto err_hashtable_init; @@ -891,7 +876,7 @@ err_fifo_clr: err_mtptpt1_set: mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0); err_mtptpt_set: - rhashtable_destroy(&ptp_state->unmatched_ht); + rhltable_destroy(&ptp_state->unmatched_ht); err_hashtable_init: kfree(ptp_state); return ERR_PTR(err); @@ -906,8 +891,8 @@ void mlxsw_sp1_ptp_fini(struct mlxsw_sp_ptp_state *ptp_state) mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, false); mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0); mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0); - rhashtable_free_and_destroy(&ptp_state->unmatched_ht, - &mlxsw_sp1_ptp_unmatched_free_fn, NULL); + rhltable_free_and_destroy(&ptp_state->unmatched_ht, + &mlxsw_sp1_ptp_unmatched_free_fn, NULL); kfree(ptp_state); } @@ -1126,3 +1111,57 @@ int mlxsw_sp1_ptp_get_ts_info(struct mlxsw_sp *mlxsw_sp, return 0; } + +struct mlxsw_sp_ptp_port_stat { + char str[ETH_GSTRING_LEN]; + ptrdiff_t offset; +}; + +#define MLXSW_SP_PTP_PORT_STAT(NAME, FIELD) \ + { \ + .str = NAME, \ + .offset = offsetof(struct mlxsw_sp_ptp_port_stats, \ + FIELD), \ + } + +static const struct mlxsw_sp_ptp_port_stat mlxsw_sp_ptp_port_stats[] = { + MLXSW_SP_PTP_PORT_STAT("ptp_rx_gcd_packets", rx_gcd.packets), + MLXSW_SP_PTP_PORT_STAT("ptp_rx_gcd_timestamps", rx_gcd.timestamps), + MLXSW_SP_PTP_PORT_STAT("ptp_tx_gcd_packets", tx_gcd.packets), + MLXSW_SP_PTP_PORT_STAT("ptp_tx_gcd_timestamps", tx_gcd.timestamps), +}; + +#undef MLXSW_SP_PTP_PORT_STAT + +#define MLXSW_SP_PTP_PORT_STATS_LEN \ + ARRAY_SIZE(mlxsw_sp_ptp_port_stats) + +int mlxsw_sp1_get_stats_count(void) +{ + return MLXSW_SP_PTP_PORT_STATS_LEN; +} + +void mlxsw_sp1_get_stats_strings(u8 **p) +{ + int i; + + for (i = 0; i < MLXSW_SP_PTP_PORT_STATS_LEN; i++) { + memcpy(*p, mlxsw_sp_ptp_port_stats[i].str, + ETH_GSTRING_LEN); + *p += ETH_GSTRING_LEN; + } +} + +void mlxsw_sp1_get_stats(struct mlxsw_sp_port *mlxsw_sp_port, + u64 *data, int data_index) +{ + void *stats = &mlxsw_sp_port->ptp.stats; + ptrdiff_t offset; + int i; + + data += data_index; + for (i = 0; i < MLXSW_SP_PTP_PORT_STATS_LEN; i++) { + offset = mlxsw_sp_ptp_port_stats[i].offset; + *data++ = *(u64 *)(stats + offset); + } +} |