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         if (val)
  40                 seq_printf(s, "%16lu %s\n", val, id);
  41 }
  42
  43 static int statistics_show(struct seq_file *s, void *p)
  44 {
  45         printstat(s, vdata_alloc);
  46         printstat(s, vdata_free);
  47         printstat(s, gts_alloc);
  48         printstat(s, gts_free);
  49         printstat(s, vdata_double_alloc);
  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, break_cow);
  63         printstat(s, asid_new);
  64         printstat(s, asid_next);
  65         printstat(s, asid_wrap);
  66         printstat(s, asid_reuse);
  67         printstat(s, intr);
  68         printstat(s, intr_mm_lock_failed);
  69         printstat(s, call_os);
  70         printstat(s, call_os_offnode_reference);
  71         printstat(s, call_os_check_for_bug);
  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, migrate_check);
  78         printstat(s, migrated_retarget);
  79         printstat(s, migrated_unload);
  80         printstat(s, migrated_unload_delay);
  81         printstat(s, migrated_nopfn_retarget);
  82         printstat(s, migrated_nopfn_unload);
  83         printstat(s, tlb_dropin);
  84         printstat(s, tlb_dropin_fail_no_asid);
  85         printstat(s, tlb_dropin_fail_upm);
  86         printstat(s, tlb_dropin_fail_invalid);
  87         printstat(s, tlb_dropin_fail_range_active);
  88         printstat(s, tlb_dropin_fail_idle);
  89         printstat(s, tlb_dropin_fail_fmm);
  90         printstat(s, tlb_dropin_fail_no_exception);
  91         printstat(s, tlb_dropin_fail_no_exception_war);
  92         printstat(s, tfh_stale_on_fault);
  93         printstat(s, mmu_invalidate_range);
  94         printstat(s, mmu_invalidate_page);
  95         printstat(s, mmu_clear_flush_young);
  96         printstat(s, flush_tlb);
  97         printstat(s, flush_tlb_gru);
  98         printstat(s, flush_tlb_gru_tgh);
  99         printstat(s, flush_tlb_gru_zero_asid);
 100         printstat(s, copy_gpa);
 101         printstat(s, mesq_receive);
 102         printstat(s, mesq_receive_none);
 103         printstat(s, mesq_send);
 104         printstat(s, mesq_send_failed);
 105         printstat(s, mesq_noop);
 106         printstat(s, mesq_send_unexpected_error);
 107         printstat(s, mesq_send_lb_overflow);
 108         printstat(s, mesq_send_qlimit_reached);
 109         printstat(s, mesq_send_amo_nacked);
 110         printstat(s, mesq_send_put_nacked);
 111         printstat(s, mesq_qf_not_full);
 112         printstat(s, mesq_qf_locked);
 113         printstat(s, mesq_qf_noop_not_full);
 114         printstat(s, mesq_qf_switch_head_failed);
 115         printstat(s, mesq_qf_unexpected_error);
 116         printstat(s, mesq_noop_unexpected_error);
 117         printstat(s, mesq_noop_lb_overflow);
 118         printstat(s, mesq_noop_qlimit_reached);
 119         printstat(s, mesq_noop_amo_nacked);
 120         printstat(s, mesq_noop_put_nacked);
 121         return 0;
 122 }
 123
 124 static ssize_t statistics_write(struct file *file, const char __user *userbuf,
 125                                 size_t count, loff_t *data)
 126 {
 127         memset(&gru_stats, 0, sizeof(gru_stats));
 128         return count;
 129 }
 130
 131 static int mcs_statistics_show(struct seq_file *s, void *p)
 132 {
 133         int op;
 134         unsigned long total, count, max;
 135         static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt",
 136                 "cch_interrupt_sync", "cch_deallocate", "tgh_invalidate"};
 137
 138         for (op = 0; op < mcsop_last; op++) {
 139                 count = atomic_long_read(&mcs_op_statistics[op].count);
 140                 total = atomic_long_read(&mcs_op_statistics[op].total);
 141                 max = mcs_op_statistics[op].max;
 142                 seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count,
 143                            count ? total / count : 0, max);
 144         }
 145         return 0;
 146 }
 147
 148 static ssize_t mcs_statistics_write(struct file *file,
 149                         const char __user *userbuf, size_t count, loff_t *data)
 150 {
 151         memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics));
 152         return count;
 153 }
 154
 155 static int options_show(struct seq_file *s, void *p)
 156 {
 157         seq_printf(s, "0x%lx\n", gru_options);
 158         return 0;
 159 }
 160
 161 static ssize_t options_write(struct file *file, const char __user *userbuf,
 162                              size_t count, loff_t *data)
 163 {
 164         char buf[20];
 165
 166         if (count >= sizeof(buf))
 167                 return -EINVAL;
 168         if (copy_from_user(buf, userbuf, count))
 169                 return -EFAULT;
 170         buf[count] = '\0';
 171         if (strict_strtoul(buf, 0, &gru_options))
 172                 return -EINVAL;
 173
 174         return count;
 175 }
 176
 177 static int cch_seq_show(struct seq_file *file, void *data)
 178 {
 179         long gid = *(long *)data;
 180         int i;
 181         struct gru_state *gru = GID_TO_GRU(gid);
 182         struct gru_thread_state *ts;
 183         const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" };
 184
 185         if (gid == 0)
 186                 seq_printf(file, "#%5s%5s%6s%9s%6s%8s%8s\n", "gid", "bid",
 187                            "ctx#", "pid", "cbrs", "dsbytes", "mode");
 188         if (gru)
 189                 for (i = 0; i < GRU_NUM_CCH; i++) {
 190                         ts = gru->gs_gts[i];
 191                         if (!ts)
 192                                 continue;
 193                         seq_printf(file, " %5d%5d%6d%9d%6d%8d%8s\n",
 194                                    gru->gs_gid, gru->gs_blade_id, i,
 195                                    ts->ts_tgid_owner,
 196                                    ts->ts_cbr_au_count * GRU_CBR_AU_SIZE,
 197                                    ts->ts_cbr_au_count * GRU_DSR_AU_BYTES,
 198                                    mode[ts->ts_user_options &
 199                                         GRU_OPT_MISS_MASK]);
 200                 }
 201
 202         return 0;
 203 }
 204
 205 static int gru_seq_show(struct seq_file *file, void *data)
 206 {
 207         long gid = *(long *)data, ctxfree, cbrfree, dsrfree;
 208         struct gru_state *gru = GID_TO_GRU(gid);
 209
 210         if (gid == 0) {
 211                 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "gid", "nid",
 212                            "ctx", "cbr", "dsr", "ctx", "cbr", "dsr");
 213                 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "", "", "busy",
 214                            "busy", "busy", "free", "free", "free");
 215         }
 216         if (gru) {
 217                 ctxfree = GRU_NUM_CCH - gru->gs_active_contexts;
 218                 cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
 219                 dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
 220                 seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n",
 221                            gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree,
 222                            GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree,
 223                            ctxfree, cbrfree, dsrfree);
 224         }
 225
 226         return 0;
 227 }
 228
 229 static void seq_stop(struct seq_file *file, void *data)
 230 {
 231 }
 232
 233 static void *seq_start(struct seq_file *file, loff_t *gid)
 234 {
 235         if (*gid < gru_max_gids)
 236                 return gid;
 237         return NULL;
 238 }
 239
 240 static void *seq_next(struct seq_file *file, void *data, loff_t *gid)
 241 {
 242         (*gid)++;
 243         if (*gid < gru_max_gids)
 244                 return gid;
 245         return NULL;
 246 }
 247
 248 static const struct seq_operations cch_seq_ops = {
 249         .start  = seq_start,
 250         .next   = seq_next,
 251         .stop   = seq_stop,
 252         .show   = cch_seq_show
 253 };
 254
 255 static const struct seq_operations gru_seq_ops = {
 256         .start  = seq_start,
 257         .next   = seq_next,
 258         .stop   = seq_stop,
 259         .show   = gru_seq_show
 260 };
 261
 262 static int statistics_open(struct inode *inode, struct file *file)
 263 {
 264         return single_open(file, statistics_show, NULL);
 265 }
 266
 267 static int mcs_statistics_open(struct inode *inode, struct file *file)
 268 {
 269         return single_open(file, mcs_statistics_show, NULL);
 270 }
 271
 272 static int options_open(struct inode *inode, struct file *file)
 273 {
 274         return single_open(file, options_show, NULL);
 275 }
 276
 277 static int cch_open(struct inode *inode, struct file *file)
 278 {
 279         return seq_open(file, &cch_seq_ops);
 280 }
 281
 282 static int gru_open(struct inode *inode, struct file *file)
 283 {
 284         return seq_open(file, &gru_seq_ops);
 285 }
 286
 287 /* *INDENT-OFF* */
 288 static const struct file_operations statistics_fops = {
 289         .open           = statistics_open,
 290         .read           = seq_read,
 291         .write          = statistics_write,
 292         .llseek         = seq_lseek,
 293         .release        = single_release,
 294 };
 295
 296 static const struct file_operations mcs_statistics_fops = {
 297         .open           = mcs_statistics_open,
 298         .read           = seq_read,
 299         .write          = mcs_statistics_write,
 300         .llseek         = seq_lseek,
 301         .release        = single_release,
 302 };
 303
 304 static const struct file_operations options_fops = {
 305         .open           = options_open,
 306         .read           = seq_read,
 307         .write          = options_write,
 308         .llseek         = seq_lseek,
 309         .release        = single_release,
 310 };
 311
 312 static const struct file_operations cch_fops = {
 313         .open           = cch_open,
 314         .read           = seq_read,
 315         .llseek         = seq_lseek,
 316         .release        = seq_release,
 317 };
 318 static const struct file_operations gru_fops = {
 319         .open           = gru_open,
 320         .read           = seq_read,
 321         .llseek         = seq_lseek,
 322         .release        = seq_release,
 323 };
 324
 325 static struct proc_entry {
 326         char *name;
 327         int mode;
 328         const struct file_operations *fops;
 329         struct proc_dir_entry *entry;
 330 } proc_files[] = {
 331         {"statistics", 0644, &statistics_fops},
 332         {"mcs_statistics", 0644, &mcs_statistics_fops},
 333         {"debug_options", 0644, &options_fops},
 334         {"cch_status", 0444, &cch_fops},
 335         {"gru_status", 0444, &gru_fops},
 336         {NULL}
 337 };
 338 /* *INDENT-ON* */
 339
 340 static struct proc_dir_entry *proc_gru __read_mostly;
 341
 342 static int create_proc_file(struct proc_entry *p)
 343 {
 344         p->entry = proc_create(p->name, p->mode, proc_gru, p->fops);
 345         if (!p->entry)
 346                 return -1;
 347         return 0;
 348 }
 349
 350 static void delete_proc_files(void)
 351 {
 352         struct proc_entry *p;
 353
 354         if (proc_gru) {
 355                 for (p = proc_files; p->name; p++)
 356                         if (p->entry)
 357                                 remove_proc_entry(p->name, proc_gru);
 358                 remove_proc_entry("gru", NULL);
 359         }
 360 }
 361
 362 int gru_proc_init(void)
 363 {
 364         struct proc_entry *p;
 365
 366         proc_gru = proc_mkdir("sgi_uv/gru", NULL);
 367
 368         for (p = proc_files; p->name; p++)
 369                 if (create_proc_file(p))
 370                         goto err;
 371         return 0;
 372
 373 err:
 374         delete_proc_files();
 375         return -1;
 376 }
 377
 378 void gru_proc_exit(void)
 379 {
 380         delete_proc_files();
 381 }