| /* |
| ************************************************************************** |
| * Copyright (c) 2017-2019, 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_tx_rx_common.h" |
| #include "nss_unaligned_stats.h" |
| |
| /* |
| * nss_unaligned_stats_read() |
| * Read unaligned stats |
| */ |
| static ssize_t nss_unaligned_stats_read(struct file *fp, char __user *ubuf, size_t sz, loff_t *ppos) |
| { |
| uint32_t max_output_lines = NSS_MAX_CORES * NSS_UNALIGNED_OPS_PER_MSG; |
| size_t size_al = NSS_STATS_MAX_STR_LENGTH * max_output_lines; |
| size_t size_wr = 0; |
| ssize_t bytes_read = 0; |
| struct nss_unaligned_stats *stats_shadow; |
| uint32_t i, j; |
| |
| char *lbuf = kzalloc(size_al, GFP_KERNEL); |
| if (unlikely(!lbuf)) { |
| nss_warning("Could not allocate memory for local statistics buffer"); |
| return 0; |
| } |
| |
| stats_shadow = kzalloc(NSS_MAX_CORES * sizeof(struct nss_unaligned_stats), GFP_KERNEL); |
| if (unlikely(!stats_shadow)) { |
| nss_warning("Could not allocate memory for local shadow buffer"); |
| kfree(lbuf); |
| return 0; |
| } |
| |
| spin_lock_bh(&nss_top_main.stats_lock); |
| for (i = 0; i < NSS_MAX_CORES; i++) { |
| stats_shadow[i] = nss_top_main.nss[i].unaligned_stats; |
| } |
| spin_unlock_bh(&nss_top_main.stats_lock); |
| |
| for (i = 0; i < NSS_MAX_CORES; i++) { |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, |
| "core: %u, total unaligned traps: %llu\n", |
| i, stats_shadow[i].trap_count); |
| for (j = 0; j < NSS_UNALIGNED_OPS_PER_MSG; j++) { |
| struct nss_unaligned_stats_op op = stats_shadow[i].ops[j]; |
| if (op.count == 0) { |
| break; |
| } |
| |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, |
| "op: %2x, ext: %2x, count:%10llu, min: %10u, avg: %10u, max: %10u\n", |
| op.opcode_primary, op.opcode_extension, op.count, op.ticks_min, |
| op.ticks_avg, op.ticks_max); |
| } |
| } |
| |
| bytes_read = simple_read_from_buffer(ubuf, sz, ppos, lbuf, strlen(lbuf)); |
| kfree(lbuf); |
| kfree(stats_shadow); |
| |
| return bytes_read; |
| } |
| |
| /* |
| * nss_unaligned_stats_ops |
| */ |
| NSS_STATS_DECLARE_FILE_OPERATIONS(unaligned) |
| |
| /* |
| * nss_unaligned_stats_dentry_create() |
| * Create unaligned statistics debug entry. |
| */ |
| void nss_unaligned_stats_dentry_create(void) |
| { |
| nss_stats_create_dentry("unaligned", &nss_unaligned_stats_ops); |
| } |