| /* |
| ************************************************************************** |
| * Copyright (c) 2016-2017, 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_core.h" |
| #include "nss_gmac_stats.h" |
| |
| /* |
| * nss_gmac_stats_str |
| * GMAC stats strings. |
| */ |
| struct nss_stats_info nss_gmac_stats_str[NSS_GMAC_STATS_MAX] = { |
| {"ticks" , NSS_STATS_TYPE_SPECIAL}, |
| {"worst_ticks" , NSS_STATS_TYPE_SPECIAL}, |
| {"iterations" , NSS_STATS_TYPE_SPECIAL} |
| }; |
| |
| /* |
| * nss_gmac_stats_read() |
| * Read GMAC stats. |
| */ |
| ssize_t nss_gmac_stats_read(struct file *fp, char __user *ubuf, size_t sz, loff_t *ppos) |
| { |
| uint32_t i, id; |
| |
| /* |
| * max output lines = ((#stats + start tag + one blank) * #GMACs) Number of Extra outputlines for future |
| * reference to add new stats + start/end tag + 3 blank |
| */ |
| uint32_t max_output_lines = NSS_GMAC_STATS_MAX * NSS_MAX_PHYSICAL_INTERFACES + 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; |
| } |
| |
| stats_shadow = kzalloc(NSS_GMAC_STATS_MAX * 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, "gmac", NSS_STATS_SINGLE_CORE); |
| |
| for (id = 0; id < NSS_MAX_PHYSICAL_INTERFACES; id++) { |
| spin_lock_bh(&nss_top_main.stats_lock); |
| for (i = 0; (i < NSS_GMAC_STATS_MAX); i++) { |
| stats_shadow[i] = nss_top_main.stats_gmac[id][i]; |
| } |
| |
| spin_unlock_bh(&nss_top_main.stats_lock); |
| size_wr += nss_stats_print("gmac", "gmac stats", id |
| , nss_gmac_stats_str |
| , stats_shadow |
| , NSS_GMAC_STATS_MAX |
| , lbuf, size_wr, size_al); |
| } |
| |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, "\ngmac stats end\n\n"); |
| bytes_read = simple_read_from_buffer(ubuf, sz, ppos, lbuf, strlen(lbuf)); |
| kfree(lbuf); |
| kfree(stats_shadow); |
| |
| return bytes_read; |
| } |