| /* |
| ************************************************************************** |
| * Copyright (c) 2018-2020, 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_c2c_rx_stats.h" |
| #include "nss_c2c_rx_strings.h" |
| |
| /* |
| * Declare atomic notifier data structure for statistics. |
| */ |
| ATOMIC_NOTIFIER_HEAD(nss_c2c_rx_stats_notifier); |
| |
| /* |
| * Spinlock to protect C2C_RX statistics update/read |
| */ |
| DEFINE_SPINLOCK(nss_c2c_rx_stats_lock); |
| |
| /* |
| * nss_c2c_rx_stats |
| * c2c_rx statistics |
| */ |
| uint64_t nss_c2c_rx_stats[NSS_MAX_CORES][NSS_C2C_RX_STATS_MAX]; |
| |
| /* |
| * nss_c2c_rx_stats_read() |
| * Read C2C_RX statistics |
| */ |
| static ssize_t nss_c2c_rx_stats_read(struct file *fp, char __user *ubuf, size_t sz, loff_t *ppos) |
| { |
| int32_t i, core; |
| |
| /* |
| * 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_C2C_RX_STATS_MAX * NSS_MAX_CORES + 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 -ENOMEM; |
| } |
| |
| stats_shadow = kzalloc(NSS_C2C_RX_STATS_MAX * 8, GFP_KERNEL); |
| if (unlikely(stats_shadow == NULL)) { |
| nss_warning("Could not allocate memory for local shadow buffer"); |
| kfree(lbuf); |
| return -ENOMEM; |
| } |
| |
| /* |
| * C2C_RX statistics |
| */ |
| for (core = 0; core < NSS_MAX_CORES; core++) { |
| spin_lock_bh(&nss_c2c_rx_stats_lock); |
| for (i = 0; i < NSS_C2C_RX_STATS_MAX; i++) { |
| stats_shadow[i] = nss_c2c_rx_stats[core][i]; |
| } |
| spin_unlock_bh(&nss_c2c_rx_stats_lock); |
| size_wr += nss_stats_banner(lbuf, size_wr, size_al, "c2c_rx", core); |
| size_wr += nss_stats_print("c2c_rx", NULL, NSS_STATS_SINGLE_INSTANCE |
| , nss_c2c_rx_strings_stats |
| , stats_shadow |
| , NSS_C2C_RX_STATS_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_c2c_rx_stats_ops |
| */ |
| NSS_STATS_DECLARE_FILE_OPERATIONS(c2c_rx); |
| |
| /* |
| * nss_c2c_rx_stats_dentry_create() |
| * Create C2C_RX statistics debug entry. |
| */ |
| void nss_c2c_rx_stats_dentry_create(void) |
| { |
| nss_stats_create_dentry("c2c_rx", &nss_c2c_rx_stats_ops); |
| } |
| |
| /* |
| * nss_c2c_rx_stats_sync() |
| * Handle the syncing of NSS C2C_RX statistics. |
| */ |
| void nss_c2c_rx_stats_sync(struct nss_ctx_instance *nss_ctx, struct nss_c2c_rx_stats *ncrs) |
| { |
| int id = nss_ctx->id; |
| int j; |
| |
| spin_lock_bh(&nss_c2c_rx_stats_lock); |
| |
| /* |
| * Common node stats |
| */ |
| nss_c2c_rx_stats[id][NSS_STATS_NODE_RX_PKTS] += (ncrs->pbuf_simple + ncrs->pbuf_sg + ncrs->pbuf_returning); |
| nss_c2c_rx_stats[id][NSS_STATS_NODE_RX_BYTES] += ncrs->node_stats.rx_bytes; |
| nss_c2c_rx_stats[id][NSS_STATS_NODE_TX_PKTS] += ncrs->node_stats.tx_packets; |
| nss_c2c_rx_stats[id][NSS_STATS_NODE_TX_BYTES] += ncrs->node_stats.tx_bytes; |
| |
| for (j = 0; j < NSS_MAX_NUM_PRI; j++) { |
| nss_c2c_rx_stats[id][NSS_STATS_NODE_RX_QUEUE_0_DROPPED + j] += ncrs->node_stats.rx_dropped[j]; |
| } |
| |
| /* |
| * C2C_RX statistics |
| */ |
| nss_c2c_rx_stats[id][NSS_C2C_RX_STATS_PBUF_SIMPLE] += ncrs->pbuf_simple; |
| nss_c2c_rx_stats[id][NSS_C2C_RX_STATS_PBUF_SG] += ncrs->pbuf_sg; |
| nss_c2c_rx_stats[id][NSS_C2C_RX_STATS_PBUF_RETURNING] += ncrs->pbuf_returning; |
| nss_c2c_rx_stats[id][NSS_C2C_RX_STATS_INVAL_DEST] += ncrs->inval_dest; |
| |
| spin_unlock_bh(&nss_c2c_rx_stats_lock); |
| } |
| |
| /* |
| * nss_c2c_rx_stats_notify() |
| * Sends notifications to all the registered modules. |
| * |
| * Leverage NSS-FW statistics timing to update Netlink. |
| */ |
| void nss_c2c_rx_stats_notify(struct nss_ctx_instance *nss_ctx) |
| { |
| struct nss_c2c_rx_stats_notification c2c_rx_stats; |
| |
| c2c_rx_stats.core_id = nss_ctx->id; |
| memcpy(c2c_rx_stats.stats, nss_c2c_rx_stats[c2c_rx_stats.core_id], sizeof(c2c_rx_stats.stats)); |
| atomic_notifier_call_chain(&nss_c2c_rx_stats_notifier, NSS_STATS_EVENT_NOTIFY, (void *)&c2c_rx_stats); |
| } |
| |
| /* |
| * nss_c2c_rx_stats_register_notifier() |
| * Registers statistics notifier. |
| */ |
| int nss_c2c_rx_stats_register_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_register(&nss_c2c_rx_stats_notifier, nb); |
| } |
| EXPORT_SYMBOL(nss_c2c_rx_stats_register_notifier); |
| |
| /* |
| * nss_c2c_rx_stats_unregister_notifier() |
| * Deregisters statistics notifier. |
| */ |
| int nss_c2c_rx_stats_unregister_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_unregister(&nss_c2c_rx_stats_notifier, nb); |
| } |
| EXPORT_SYMBOL(nss_c2c_rx_stats_unregister_notifier); |