| /* |
| ************************************************************************** |
| * Copyright (c) 2017, 2019-2020 The Linux Foundation. All rights reserved. |
| * Permission to use, copy, modify, and/or distribute this software for |
| * any purpose with or without fee is hereby granted, provided that the |
| * above copyright notice and this permission notice appear in all copies. |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
| * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| ************************************************************************** |
| */ |
| |
| #include "nss_core.h" |
| #include "nss_eth_rx_stats.h" |
| #include "nss_eth_rx_strings.h" |
| |
| /* |
| * Declare atomic notifier data structure for statistics. |
| */ |
| ATOMIC_NOTIFIER_HEAD(nss_eth_rx_stats_notifier); |
| |
| uint64_t nss_eth_rx_stats[NSS_ETH_RX_STATS_MAX]; /* ETH_RX statistics */ |
| uint64_t nss_eth_rx_exception_stats[NSS_ETH_RX_EXCEPTION_EVENT_MAX]; /* Unknown protocol exception events per interface */ |
| |
| /* |
| * nss_eth_rx_stats_read() |
| * Read ETH_RX stats. |
| */ |
| static ssize_t nss_eth_rx_stats_read(struct file *fp, char __user *ubuf, size_t sz, loff_t *ppos) |
| { |
| int32_t i; |
| |
| /* |
| * Max output lines = #stats * NSS_MAX_CORES + |
| * few blank lines for banner printing + Number of Extra outputlines for future reference to add new stats |
| */ |
| uint32_t max_output_lines = NSS_STATS_NODE_MAX + NSS_ETH_RX_STATS_MAX + NSS_ETH_RX_EXCEPTION_EVENT_MAX + NSS_STATS_EXTRA_OUTPUT_LINES; |
| size_t size_al = NSS_STATS_MAX_STR_LENGTH * max_output_lines; |
| size_t size_wr = 0; |
| ssize_t bytes_read = 0; |
| uint64_t *stats_shadow; |
| |
| char *lbuf = kzalloc(size_al, GFP_KERNEL); |
| if (unlikely(lbuf == NULL)) { |
| nss_warning("Could not allocate memory for local statistics buffer"); |
| return 0; |
| } |
| |
| /* |
| * Note: The assumption here is that we do not have more than 64 stats. |
| */ |
| stats_shadow = kzalloc(64 * 8, GFP_KERNEL); |
| if (unlikely(stats_shadow == NULL)) { |
| nss_warning("Could not allocate memory for local shadow buffer"); |
| kfree(lbuf); |
| return 0; |
| } |
| |
| size_wr += nss_stats_banner(lbuf, size_wr, size_al, "eth_rx", NSS_STATS_SINGLE_CORE); |
| |
| size_wr += nss_stats_fill_common_stats(NSS_ETH_RX_INTERFACE, NSS_STATS_SINGLE_INSTANCE, lbuf, size_wr, size_al, "eth_rx"); |
| |
| /* |
| * eth_rx node stats. |
| */ |
| spin_lock_bh(&nss_top_main.stats_lock); |
| for (i = 0; (i < NSS_ETH_RX_STATS_MAX); i++) { |
| stats_shadow[i] = nss_eth_rx_stats[i]; |
| } |
| |
| spin_unlock_bh(&nss_top_main.stats_lock); |
| |
| size_wr += nss_stats_print("eth_rx", "eth_rx node stats" |
| , NSS_STATS_SINGLE_INSTANCE |
| , nss_eth_rx_strings_stats |
| , stats_shadow |
| , NSS_ETH_RX_STATS_MAX |
| , lbuf, size_wr, size_al); |
| |
| /* |
| * Exception stats. |
| */ |
| spin_lock_bh(&nss_top_main.stats_lock); |
| for (i = 0; (i < NSS_ETH_RX_EXCEPTION_EVENT_MAX); i++) { |
| stats_shadow[i] = nss_eth_rx_exception_stats[i]; |
| } |
| |
| spin_unlock_bh(&nss_top_main.stats_lock); |
| |
| size_wr += nss_stats_print("eth_rx", "eth_rx exception stats" |
| , NSS_STATS_SINGLE_INSTANCE |
| , nss_eth_rx_strings_exception_stats |
| , stats_shadow |
| , NSS_ETH_RX_EXCEPTION_EVENT_MAX |
| , lbuf, size_wr, size_al); |
| bytes_read = simple_read_from_buffer(ubuf, sz, ppos, lbuf, strlen(lbuf)); |
| kfree(lbuf); |
| kfree(stats_shadow); |
| |
| return bytes_read; |
| } |
| |
| /* |
| * nss_eth_rx_stats_ops. |
| */ |
| NSS_STATS_DECLARE_FILE_OPERATIONS(eth_rx); |
| |
| /* |
| * nss_eth_rx_stats_dentry_create() |
| * Create eth_rx statistics debug entry. |
| */ |
| void nss_eth_rx_stats_dentry_create(void) |
| { |
| nss_stats_create_dentry("eth_rx", &nss_eth_rx_stats_ops); |
| } |
| |
| /* |
| * nss_eth_rx_metadata_stats_sync() |
| * Handle the syncing of ETH_RX node statistics. |
| */ |
| void nss_eth_rx_metadata_stats_sync(struct nss_ctx_instance *nss_ctx, struct nss_eth_rx_node_sync *nens) |
| { |
| int32_t i; |
| struct nss_top_instance *nss_top = nss_ctx->nss_top; |
| |
| spin_lock_bh(&nss_top->stats_lock); |
| |
| nss_top->stats_node[NSS_ETH_RX_INTERFACE][NSS_STATS_NODE_RX_PKTS] += nens->node_stats.rx_packets; |
| nss_top->stats_node[NSS_ETH_RX_INTERFACE][NSS_STATS_NODE_RX_BYTES] += nens->node_stats.rx_bytes; |
| nss_top->stats_node[NSS_ETH_RX_INTERFACE][NSS_STATS_NODE_TX_PKTS] += nens->node_stats.tx_packets; |
| nss_top->stats_node[NSS_ETH_RX_INTERFACE][NSS_STATS_NODE_TX_BYTES] += nens->node_stats.tx_bytes; |
| |
| for (i = 0; i < NSS_MAX_NUM_PRI; i++) { |
| nss_top->stats_node[NSS_ETH_RX_INTERFACE][NSS_STATS_NODE_RX_QUEUE_0_DROPPED + i] += nens->node_stats.rx_dropped[i]; |
| } |
| |
| nss_eth_rx_stats[NSS_ETH_RX_STATS_TOTAL_TICKS] += nens->total_ticks; |
| nss_eth_rx_stats[NSS_ETH_RX_STATS_WORST_CASE_TICKS] += nens->worst_case_ticks; |
| nss_eth_rx_stats[NSS_ETH_RX_STATS_ITERATIONS] += nens->iterations; |
| |
| for (i = 0; i < NSS_ETH_RX_EXCEPTION_EVENT_MAX; i++) { |
| nss_eth_rx_exception_stats[i] += nens->exception_events[i]; |
| } |
| |
| spin_unlock_bh(&nss_top->stats_lock); |
| } |
| |
| /* |
| * nss_eth_rx_stats_notify() |
| * Sends notifications to the registered modules. |
| * |
| * Leverage NSS-FW statistics timing to update Netlink. |
| */ |
| void nss_eth_rx_stats_notify(struct nss_ctx_instance *nss_ctx) |
| { |
| struct nss_eth_rx_stats_notification eth_rx_stats; |
| |
| eth_rx_stats.core_id = nss_ctx->id; |
| memcpy(eth_rx_stats.cmn_node_stats, nss_top_main.stats_node[NSS_ETH_RX_INTERFACE], sizeof(eth_rx_stats.cmn_node_stats)); |
| memcpy(eth_rx_stats.special_stats, nss_eth_rx_stats, sizeof(eth_rx_stats.special_stats)); |
| memcpy(eth_rx_stats.exception_stats, nss_eth_rx_exception_stats, sizeof(eth_rx_stats.exception_stats)); |
| atomic_notifier_call_chain(&nss_eth_rx_stats_notifier, NSS_STATS_EVENT_NOTIFY, (void *)ð_rx_stats); |
| } |
| |
| /* |
| * nss_eth_rx_stats_register_notifier() |
| * Registers statistics notifier. |
| */ |
| int nss_eth_rx_stats_register_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_register(&nss_eth_rx_stats_notifier, nb); |
| } |
| EXPORT_SYMBOL(nss_eth_rx_stats_register_notifier); |
| |
| /* |
| * nss_eth_rx_stats_unregister_notifier() |
| * Deregisters statistics notifier. |
| */ |
| int nss_eth_rx_stats_unregister_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_unregister(&nss_eth_rx_stats_notifier, nb); |
| } |
| EXPORT_SYMBOL(nss_eth_rx_stats_unregister_notifier); |