drivers/misc/sgi-gru/gruprocfs.c

   1 /*
   2  * SN Platform GRU Driver
   3  *
   4  *              PROC INTERFACES
   5  *
   6  * This file supports the /proc interfaces for the GRU driver
   7  *
   8  *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23  */
  24
  25 #include <linux/proc_fs.h>
  26 #include <linux/device.h>
  27 #include <linux/seq_file.h>
  28 #include <linux/uaccess.h>
  29 #include "gru.h"
  30 #include "grulib.h"
  31 #include "grutables.h"
  32
  33 #define printstat(s, f)         printstat_val(s, &gru_stats.f, #f)
  34
  35 static void printstat_val(struct seq_file *s, atomic_long_t *v, char *id)
  36 {
  37         unsigned long val = atomic_long_read(v);
  38
  39         seq_printf(s, "%16lu %s\n", val, id);
  40 }
  41
  42 static int statistics_show(struct seq_file *s, void *p)
  43 {
  44         printstat(s, vdata_alloc);
  45         printstat(s, vdata_free);
  46         printstat(s, gts_alloc);
  47         printstat(s, gts_free);
  48         printstat(s, gms_alloc);
  49         printstat(s, gms_free);
  50         printstat(s, gts_double_allocate);
  51         printstat(s, assign_context);
  52         printstat(s, assign_context_failed);
  53         printstat(s, free_context);
  54         printstat(s, load_user_context);
  55         printstat(s, load_kernel_context);
  56         printstat(s, lock_kernel_context);
  57         printstat(s, unlock_kernel_context);
  58         printstat(s, steal_user_context);
  59         printstat(s, steal_kernel_context);
  60         printstat(s, steal_context_failed);
  61         printstat(s, nopfn);
  62         printstat(s, asid_new);
  63         printstat(s, asid_next);
  64         printstat(s, asid_wrap);
  65         printstat(s, asid_reuse);
  66         printstat(s, intr);
  67         printstat(s, intr_cbr);
  68         printstat(s, intr_tfh);
  69         printstat(s, intr_spurious);
  70         printstat(s, intr_mm_lock_failed);
  71         printstat(s, call_os);
  72         printstat(s, call_os_wait_queue);
  73         printstat(s, user_flush_tlb);
  74         printstat(s, user_unload_context);
  75         printstat(s, user_exception);
  76         printstat(s, set_context_option);
  77         printstat(s, check_context_retarget_intr);
  78         printstat(s, check_context_unload);
  79         printstat(s, tlb_dropin);
  80         printstat(s, tlb_preload_page);
  81         printstat(s, tlb_dropin_fail_no_asid);
  82         printstat(s, tlb_dropin_fail_upm);
  83         printstat(s, tlb_dropin_fail_invalid);
  84         printstat(s, tlb_dropin_fail_range_active);
  85         printstat(s, tlb_dropin_fail_idle);
  86         printstat(s, tlb_dropin_fail_fmm);
  87         printstat(s, tlb_dropin_fail_no_exception);
  88         printstat(s, tfh_stale_on_fault);
  89         printstat(s, mmu_invalidate_range);
  90         printstat(s, mmu_invalidate_page);
  91         printstat(s, flush_tlb);
  92         printstat(s, flush_tlb_gru);
  93         printstat(s, flush_tlb_gru_tgh);
  94         printstat(s, flush_tlb_gru_zero_asid);
  95         printstat(s, copy_gpa);
  96         printstat(s, read_gpa);
  97         printstat(s, mesq_receive);
  98         printstat(s, mesq_receive_none);
  99         printstat(s, mesq_send);
 100         printstat(s, mesq_send_failed);
 101         printstat(s, mesq_noop);
 102         printstat(s, mesq_send_unexpected_error);
 103         printstat(s, mesq_send_lb_overflow);
 104         printstat(s, mesq_send_qlimit_reached);
 105         printstat(s, mesq_send_amo_nacked);
 106         printstat(s, mesq_send_put_nacked);
 107         printstat(s, mesq_qf_locked);
 108         printstat(s, mesq_qf_noop_not_full);
 109         printstat(s, mesq_qf_switch_head_failed);
 110         printstat(s, mesq_qf_unexpected_error);
 111         printstat(s, mesq_noop_unexpected_error);
 112         printstat(s, mesq_noop_lb_overflow);
 113         printstat(s, mesq_noop_qlimit_reached);
 114         printstat(s, mesq_noop_amo_nacked);
 115         printstat(s, mesq_noop_put_nacked);
 116         printstat(s, mesq_noop_page_overflow);
 117         return 0;
 118 }
 119
 120 static ssize_t statistics_write(struct file *file, const char __user *userbuf,
 121                                 size_t count, loff_t *data)
 122 {
 123         memset(&gru_stats, 0, sizeof(gru_stats));
 124         return count;
 125 }
 126
 127 static int mcs_statistics_show(struct seq_file *s, void *p)
 128 {
 129         int op;
 130         unsigned long total, count, max;
 131         static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt",
 132                 "cch_interrupt_sync", "cch_deallocate", "tfh_write_only",
 133                 "tfh_write_restart", "tgh_invalidate"};
 134
 135         seq_printf(s, "%-20s%12s%12s%12s\n", "#id", "count", "aver-clks", "max-clks");
 136         for (op = 0; op < mcsop_last; op++) {
 137                 count = atomic_long_read(&mcs_op_statistics[op].count);
 138                 total = atomic_long_read(&mcs_op_statistics[op].total);
 139                 max = mcs_op_statistics[op].max;
 140                 seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count,
 141                            count ? total / count : 0, max);
 142         }
 143         return 0;
 144 }
 145
 146 static ssize_t mcs_statistics_write(struct file *file,
 147                         const char __user *userbuf, size_t count, loff_t *data)
 148 {
 149         memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics));
 150         return count;
 151 }
 152
 153 static int options_show(struct seq_file *s, void *p)
 154 {
 155         seq_printf(s, "#bitmask: 1=trace, 2=statistics\n");
 156         seq_printf(s, "0x%lx\n", gru_options);
 157         return 0;
 158 }
 159
 160 static ssize_t options_write(struct file *file, const char __user *userbuf,
 161                              size_t count, loff_t *data)
 162 {
 163         int ret;
 164
 165         ret = kstrtoul_from_user(userbuf, count, 0, &gru_options);
 166         if (ret)
 167                 return ret;
 168
 169         return count;
 170 }
 171
 172 static int cch_seq_show(struct seq_file *file, void *data)
 173 {
 174         long gid = *(long *)data;
 175         int i;
 176         struct gru_state *gru = GID_TO_GRU(gid);
 177         struct gru_thread_state *ts;
 178         const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" };
 179
 180         if (gid == 0)
 181                 seq_printf(file, "#%5s%5s%6s%7s%9s%6s%8s%8s\n", "gid", "bid",
 182                            "ctx#", "asid", "pid", "cbrs", "dsbytes", "mode");
 183         if (gru)
 184                 for (i = 0; i < GRU_NUM_CCH; i++) {
 185                         ts = gru->gs_gts[i];
 186                         if (!ts)
 187                                 continue;
 188                         seq_printf(file, " %5d%5d%6d%7d%9d%6d%8d%8s\n",
 189                                    gru->gs_gid, gru->gs_blade_id, i,
 190                                    is_kernel_context(ts) ? 0 : ts->ts_gms->ms_asids[gid].mt_asid,
 191                                    is_kernel_context(ts) ? 0 : ts->ts_tgid_owner,
 192                                    ts->ts_cbr_au_count * GRU_CBR_AU_SIZE,
 193                                    ts->ts_cbr_au_count * GRU_DSR_AU_BYTES,
 194                                    mode[ts->ts_user_options &
 195                                         GRU_OPT_MISS_MASK]);
 196                 }
 197
 198         return 0;
 199 }
 200
 201 static int gru_seq_show(struct seq_file *file, void *data)
 202 {
 203         long gid = *(long *)data, ctxfree, cbrfree, dsrfree;
 204         struct gru_state *gru = GID_TO_GRU(gid);
 205
 206         if (gid == 0) {
 207                 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "gid", "nid",
 208                            "ctx", "cbr", "dsr", "ctx", "cbr", "dsr");
 209                 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "", "", "busy",
 210                            "busy", "busy", "free", "free", "free");
 211         }
 212         if (gru) {
 213                 ctxfree = GRU_NUM_CCH - gru->gs_active_contexts;
 214                 cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
 215                 dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
 216                 seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n",
 217                            gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree,
 218                            GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree,
 219                            ctxfree, cbrfree, dsrfree);
 220         }
 221
 222         return 0;
 223 }
 224
 225 static void seq_stop(struct seq_file *file, void *data)
 226 {
 227 }
 228
 229 static void *seq_start(struct seq_file *file, loff_t *gid)
 230 {
 231         if (*gid < gru_max_gids)
 232                 return gid;
 233         return NULL;
 234 }
 235
 236 static void *seq_next(struct seq_file *file, void *data, loff_t *gid)
 237 {
 238         (*gid)++;
 239         if (*gid < gru_max_gids)
 240                 return gid;
 241         return NULL;
 242 }
 243
 244 static const struct seq_operations cch_seq_ops = {
 245         .start  = seq_start,
 246         .next   = seq_next,
 247         .stop   = seq_stop,
 248         .show   = cch_seq_show
 249 };
 250
 251 static const struct seq_operations gru_seq_ops = {
 252         .start  = seq_start,
 253         .next   = seq_next,
 254         .stop   = seq_stop,
 255         .show   = gru_seq_show
 256 };
 257
 258 static int statistics_open(struct inode *inode, struct file *file)
 259 {
 260         return single_open(file, statistics_show, NULL);
 261 }
 262
 263 static int mcs_statistics_open(struct inode *inode, struct file *file)
 264 {
 265         return single_open(file, mcs_statistics_show, NULL);
 266 }
 267
 268 static int options_open(struct inode *inode, struct file *file)
 269 {
 270         return single_open(file, options_show, NULL);
 271 }
 272
 273 static int cch_open(struct inode *inode, struct file *file)
 274 {
 275         return seq_open(file, &cch_seq_ops);
 276 }
 277
 278 static int gru_open(struct inode *inode, struct file *file)
 279 {
 280         return seq_open(file, &gru_seq_ops);
 281 }
 282
 283 /* *INDENT-OFF* */
 284 static const struct file_operations statistics_fops = {
 285         .open           = statistics_open,
 286         .read           = seq_read,
 287         .write          = statistics_write,
 288         .llseek         = seq_lseek,
 289         .release        = single_release,
 290 };
 291
 292 static const struct file_operations mcs_statistics_fops = {
 293         .open           = mcs_statistics_open,
 294         .read           = seq_read,
 295         .write          = mcs_statistics_write,
 296         .llseek         = seq_lseek,
 297         .release        = single_release,
 298 };
 299
 300 static const struct file_operations options_fops = {
 301         .open           = options_open,
 302         .read           = seq_read,
 303         .write          = options_write,
 304         .llseek         = seq_lseek,
 305         .release        = single_release,
 306 };
 307
 308 static const struct file_operations cch_fops = {
 309         .open           = cch_open,
 310         .read           = seq_read,
 311         .llseek         = seq_lseek,
 312         .release        = seq_release,
 313 };
 314 static const struct file_operations gru_fops = {
 315         .open           = gru_open,
 316         .read           = seq_read,
 317         .llseek         = seq_lseek,
 318         .release        = seq_release,
 319 };
 320
 321 static struct proc_entry {
 322         char *name;
 323         umode_t mode;
 324         const struct file_operations *fops;
 325         struct proc_dir_entry *entry;
 326 } proc_files[] = {
 327         {"statistics", 0644, &statistics_fops},
 328         {"mcs_statistics", 0644, &mcs_statistics_fops},
 329         {"debug_options", 0644, &options_fops},
 330         {"cch_status", 0444, &cch_fops},
 331         {"gru_status", 0444, &gru_fops},
 332         {NULL}
 333 };
 334 /* *INDENT-ON* */
 335
 336 static struct proc_dir_entry *proc_gru __read_mostly;
 337
 338 static int create_proc_file(struct proc_entry *p)
 339 {
 340         p->entry = proc_create(p->name, p->mode, proc_gru, p->fops);
 341         if (!p->entry)
 342                 return -1;
 343         return 0;
 344 }
 345
 346 static void delete_proc_files(void)
 347 {
 348         struct proc_entry *p;
 349
 350         if (proc_gru) {
 351                 for (p = proc_files; p->name; p++)
 352                         if (p->entry)
 353                                 remove_proc_entry(p->name, proc_gru);
 354                 proc_remove(proc_gru);
 355         }
 356 }
 357
 358 int gru_proc_init(void)
 359 {
 360         struct proc_entry *p;
 361
 362         proc_gru = proc_mkdir("sgi_uv/gru", NULL);
 363
 364         for (p = proc_files; p->name; p++)
 365                 if (create_proc_file(p))
 366                         goto err;
 367         return 0;
 368
 369 err:
 370         delete_proc_files();
 371         return -1;
 372 }
 373
 374 void gru_proc_exit(void)
 375 {
 376         delete_proc_files();
 377 }