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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * SN Platform GRU Driver4 *5 * PROC INTERFACES6 *7 * This file supports the /proc interfaces for the GRU driver8 *9 * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.10 */11 12#include <linux/proc_fs.h>13#include <linux/device.h>14#include <linux/seq_file.h>15#include <linux/uaccess.h>16#include "gru.h"17#include "grulib.h"18#include "grutables.h"19 20#define printstat(s, f) printstat_val(s, &gru_stats.f, #f)21 22static void printstat_val(struct seq_file *s, atomic_long_t *v, char *id)23{24 unsigned long val = atomic_long_read(v);25 26 seq_printf(s, "%16lu %s\n", val, id);27}28 29static int statistics_show(struct seq_file *s, void *p)30{31 printstat(s, vdata_alloc);32 printstat(s, vdata_free);33 printstat(s, gts_alloc);34 printstat(s, gts_free);35 printstat(s, gms_alloc);36 printstat(s, gms_free);37 printstat(s, gts_double_allocate);38 printstat(s, assign_context);39 printstat(s, assign_context_failed);40 printstat(s, free_context);41 printstat(s, load_user_context);42 printstat(s, load_kernel_context);43 printstat(s, lock_kernel_context);44 printstat(s, unlock_kernel_context);45 printstat(s, steal_user_context);46 printstat(s, steal_kernel_context);47 printstat(s, steal_context_failed);48 printstat(s, nopfn);49 printstat(s, asid_new);50 printstat(s, asid_next);51 printstat(s, asid_wrap);52 printstat(s, asid_reuse);53 printstat(s, intr);54 printstat(s, intr_cbr);55 printstat(s, intr_tfh);56 printstat(s, intr_spurious);57 printstat(s, intr_mm_lock_failed);58 printstat(s, call_os);59 printstat(s, call_os_wait_queue);60 printstat(s, user_flush_tlb);61 printstat(s, user_unload_context);62 printstat(s, user_exception);63 printstat(s, set_context_option);64 printstat(s, check_context_retarget_intr);65 printstat(s, check_context_unload);66 printstat(s, tlb_dropin);67 printstat(s, tlb_preload_page);68 printstat(s, tlb_dropin_fail_no_asid);69 printstat(s, tlb_dropin_fail_upm);70 printstat(s, tlb_dropin_fail_invalid);71 printstat(s, tlb_dropin_fail_range_active);72 printstat(s, tlb_dropin_fail_idle);73 printstat(s, tlb_dropin_fail_fmm);74 printstat(s, tlb_dropin_fail_no_exception);75 printstat(s, tfh_stale_on_fault);76 printstat(s, mmu_invalidate_range);77 printstat(s, mmu_invalidate_page);78 printstat(s, flush_tlb);79 printstat(s, flush_tlb_gru);80 printstat(s, flush_tlb_gru_tgh);81 printstat(s, flush_tlb_gru_zero_asid);82 printstat(s, copy_gpa);83 printstat(s, read_gpa);84 printstat(s, mesq_receive);85 printstat(s, mesq_receive_none);86 printstat(s, mesq_send);87 printstat(s, mesq_send_failed);88 printstat(s, mesq_noop);89 printstat(s, mesq_send_unexpected_error);90 printstat(s, mesq_send_lb_overflow);91 printstat(s, mesq_send_qlimit_reached);92 printstat(s, mesq_send_amo_nacked);93 printstat(s, mesq_send_put_nacked);94 printstat(s, mesq_qf_locked);95 printstat(s, mesq_qf_noop_not_full);96 printstat(s, mesq_qf_switch_head_failed);97 printstat(s, mesq_qf_unexpected_error);98 printstat(s, mesq_noop_unexpected_error);99 printstat(s, mesq_noop_lb_overflow);100 printstat(s, mesq_noop_qlimit_reached);101 printstat(s, mesq_noop_amo_nacked);102 printstat(s, mesq_noop_put_nacked);103 printstat(s, mesq_noop_page_overflow);104 return 0;105}106 107static ssize_t statistics_write(struct file *file, const char __user *userbuf,108 size_t count, loff_t *data)109{110 memset(&gru_stats, 0, sizeof(gru_stats));111 return count;112}113 114static int mcs_statistics_show(struct seq_file *s, void *p)115{116 int op;117 unsigned long total, count, max;118 static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt",119 "cch_interrupt_sync", "cch_deallocate", "tfh_write_only",120 "tfh_write_restart", "tgh_invalidate"};121 122 seq_puts(s, "#id count aver-clks max-clks\n");123 for (op = 0; op < mcsop_last; op++) {124 count = atomic_long_read(&mcs_op_statistics[op].count);125 total = atomic_long_read(&mcs_op_statistics[op].total);126 max = mcs_op_statistics[op].max;127 seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count,128 count ? total / count : 0, max);129 }130 return 0;131}132 133static ssize_t mcs_statistics_write(struct file *file,134 const char __user *userbuf, size_t count, loff_t *data)135{136 memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics));137 return count;138}139 140static int options_show(struct seq_file *s, void *p)141{142 seq_printf(s, "#bitmask: 1=trace, 2=statistics\n");143 seq_printf(s, "0x%lx\n", gru_options);144 return 0;145}146 147static ssize_t options_write(struct file *file, const char __user *userbuf,148 size_t count, loff_t *data)149{150 int ret;151 152 ret = kstrtoul_from_user(userbuf, count, 0, &gru_options);153 if (ret)154 return ret;155 156 return count;157}158 159static int cch_seq_show(struct seq_file *file, void *data)160{161 long gid = *(long *)data;162 int i;163 struct gru_state *gru = GID_TO_GRU(gid);164 struct gru_thread_state *ts;165 const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" };166 167 if (gid == 0)168 seq_puts(file, "# gid bid ctx# asid pid cbrs dsbytes mode\n");169 if (gru)170 for (i = 0; i < GRU_NUM_CCH; i++) {171 ts = gru->gs_gts[i];172 if (!ts)173 continue;174 seq_printf(file, " %5d%5d%6d%7d%9d%6d%8d%8s\n",175 gru->gs_gid, gru->gs_blade_id, i,176 is_kernel_context(ts) ? 0 : ts->ts_gms->ms_asids[gid].mt_asid,177 is_kernel_context(ts) ? 0 : ts->ts_tgid_owner,178 ts->ts_cbr_au_count * GRU_CBR_AU_SIZE,179 ts->ts_cbr_au_count * GRU_DSR_AU_BYTES,180 mode[ts->ts_user_options &181 GRU_OPT_MISS_MASK]);182 }183 184 return 0;185}186 187static int gru_seq_show(struct seq_file *file, void *data)188{189 long gid = *(long *)data, ctxfree, cbrfree, dsrfree;190 struct gru_state *gru = GID_TO_GRU(gid);191 192 if (gid == 0) {193 seq_puts(file, "# gid nid ctx cbr dsr ctx cbr dsr\n");194 seq_puts(file, "# busy busy busy free free free\n");195 }196 if (gru) {197 ctxfree = GRU_NUM_CCH - gru->gs_active_contexts;198 cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;199 dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;200 seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n",201 gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree,202 GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree,203 ctxfree, cbrfree, dsrfree);204 }205 206 return 0;207}208 209static void seq_stop(struct seq_file *file, void *data)210{211}212 213static void *seq_start(struct seq_file *file, loff_t *gid)214{215 if (*gid < gru_max_gids)216 return gid;217 return NULL;218}219 220static void *seq_next(struct seq_file *file, void *data, loff_t *gid)221{222 (*gid)++;223 if (*gid < gru_max_gids)224 return gid;225 return NULL;226}227 228static const struct seq_operations cch_seq_ops = {229 .start = seq_start,230 .next = seq_next,231 .stop = seq_stop,232 .show = cch_seq_show233};234 235static const struct seq_operations gru_seq_ops = {236 .start = seq_start,237 .next = seq_next,238 .stop = seq_stop,239 .show = gru_seq_show240};241 242static int statistics_open(struct inode *inode, struct file *file)243{244 return single_open(file, statistics_show, NULL);245}246 247static int mcs_statistics_open(struct inode *inode, struct file *file)248{249 return single_open(file, mcs_statistics_show, NULL);250}251 252static int options_open(struct inode *inode, struct file *file)253{254 return single_open(file, options_show, NULL);255}256 257/* *INDENT-OFF* */258static const struct proc_ops statistics_proc_ops = {259 .proc_open = statistics_open,260 .proc_read = seq_read,261 .proc_write = statistics_write,262 .proc_lseek = seq_lseek,263 .proc_release = single_release,264};265 266static const struct proc_ops mcs_statistics_proc_ops = {267 .proc_open = mcs_statistics_open,268 .proc_read = seq_read,269 .proc_write = mcs_statistics_write,270 .proc_lseek = seq_lseek,271 .proc_release = single_release,272};273 274static const struct proc_ops options_proc_ops = {275 .proc_open = options_open,276 .proc_read = seq_read,277 .proc_write = options_write,278 .proc_lseek = seq_lseek,279 .proc_release = single_release,280};281 282static struct proc_dir_entry *proc_gru __read_mostly;283 284int gru_proc_init(void)285{286 proc_gru = proc_mkdir("sgi_uv/gru", NULL);287 if (!proc_gru)288 return -1;289 if (!proc_create("statistics", 0644, proc_gru, &statistics_proc_ops))290 goto err;291 if (!proc_create("mcs_statistics", 0644, proc_gru, &mcs_statistics_proc_ops))292 goto err;293 if (!proc_create("debug_options", 0644, proc_gru, &options_proc_ops))294 goto err;295 if (!proc_create_seq("cch_status", 0444, proc_gru, &cch_seq_ops))296 goto err;297 if (!proc_create_seq("gru_status", 0444, proc_gru, &gru_seq_ops))298 goto err;299 return 0;300err:301 remove_proc_subtree("sgi_uv/gru", NULL);302 return -1;303}304 305void gru_proc_exit(void)306{307 remove_proc_subtree("sgi_uv/gru", NULL);308}309