drivers/misc/sgi-gru/gruprocfs.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * SN Platform GRU Driver
   4  *
   5  *              PROC INTERFACES
   6  *
   7  * This file supports the /proc interfaces for the GRU driver
   8  *
   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
  22 static 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
  29 static 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
 107 static 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
 114 static 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
 133 static 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
 140 static 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
 147 static 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
 159 static 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
 187 static 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
 209 static void seq_stop(struct seq_file *file, void *data)
 210 {
 211 }
 212
 213 static 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
 220 static 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
 228 static const struct seq_operations cch_seq_ops = {
 229         .start  = seq_start,
 230         .next   = seq_next,
 231         .stop   = seq_stop,
 232         .show   = cch_seq_show
 233 };
 234
 235 static const struct seq_operations gru_seq_ops = {
 236         .start  = seq_start,
 237         .next   = seq_next,
 238         .stop   = seq_stop,
 239         .show   = gru_seq_show
 240 };
 241
 242 static int statistics_open(struct inode *inode, struct file *file)
 243 {
 244         return single_open(file, statistics_show, NULL);
 245 }
 246
 247 static int mcs_statistics_open(struct inode *inode, struct file *file)
 248 {
 249         return single_open(file, mcs_statistics_show, NULL);
 250 }
 251
 252 static int options_open(struct inode *inode, struct file *file)
 253 {
 254         return single_open(file, options_show, NULL);
 255 }
 256
 257 /* *INDENT-OFF* */
 258 static 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
 266 static 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
 274 static 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
 282 static struct proc_dir_entry *proc_gru __read_mostly;
 283
 284 int 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;
 300 err:
 301         remove_proc_subtree("sgi_uv/gru", NULL);
 302         return -1;
 303 }
 304
 305 void gru_proc_exit(void)
 306 {
 307         remove_proc_subtree("sgi_uv/gru", NULL);
 308 }