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_task_slice);
  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, mmu_invalidate_range);
  93         printstat(s, mmu_invalidate_page);
  94         printstat(s, mmu_clear_flush_young);
  95         printstat(s, flush_tlb);
  96         printstat(s, flush_tlb_gru);
  97         printstat(s, flush_tlb_gru_tgh);
  98         printstat(s, flush_tlb_gru_zero_asid);
  99         printstat(s, copy_gpa);
 100         printstat(s, mesq_receive);
 101         printstat(s, mesq_receive_none);
 102         printstat(s, mesq_send);
 103         printstat(s, mesq_send_failed);
 104         printstat(s, mesq_noop);
 105         printstat(s, mesq_send_unexpected_error);
 106         printstat(s, mesq_send_lb_overflow);
 107         printstat(s, mesq_send_qlimit_reached);
 108         printstat(s, mesq_send_amo_nacked);
 109         printstat(s, mesq_send_put_nacked);
 110         printstat(s, mesq_qf_not_full);
 111         printstat(s, mesq_qf_locked);
 112         printstat(s, mesq_qf_noop_not_full);
 113         printstat(s, mesq_qf_switch_head_failed);
 114         printstat(s, mesq_qf_unexpected_error);
 115         printstat(s, mesq_noop_unexpected_error);
 116         printstat(s, mesq_noop_lb_overflow);
 117         printstat(s, mesq_noop_qlimit_reached);
 118         printstat(s, mesq_noop_amo_nacked);
 119         printstat(s, mesq_noop_put_nacked);
 120         return 0;
 121 }
 122
 123 static ssize_t statistics_write(struct file *file, const char __user *userbuf,
 124                                 size_t count, loff_t *data)
 125 {
 126         memset(&gru_stats, 0, sizeof(gru_stats));
 127         return count;
 128 }
 129
 130 static int mcs_statistics_show(struct seq_file *s, void *p)
 131 {
 132         int op;
 133         unsigned long total, count, max;
 134         static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt",
 135                 "cch_interrupt_sync", "cch_deallocate", "tgh_invalidate"};
 136
 137         for (op = 0; op < mcsop_last; op++) {
 138                 count = atomic_long_read(&mcs_op_statistics[op].count);
 139                 total = atomic_long_read(&mcs_op_statistics[op].total);
 140                 max = mcs_op_statistics[op].max;
 141                 seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count,
 142                            count ? total / count : 0, max);
 143         }
 144         return 0;
 145 }
 146
 147 static ssize_t mcs_statistics_write(struct file *file,
 148                         const char __user *userbuf, size_t count, loff_t *data)
 149 {
 150         memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics));
 151         return count;
 152 }
 153
 154 static int options_show(struct seq_file *s, void *p)
 155 {
 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         unsigned long val;
 164         char buf[80];
 165
 166         if (strncpy_from_user(buf, userbuf, sizeof(buf) - 1) < 0)
 167                 return -EFAULT;
 168         buf[count - 1] = '\0';
 169         if (!strict_strtoul(buf, 10, &val))
 170                 gru_options = val;
 171
 172         return count;
 173 }
 174
 175 static int cch_seq_show(struct seq_file *file, void *data)
 176 {
 177         long gid = *(long *)data;
 178         int i;
 179         struct gru_state *gru = GID_TO_GRU(gid);
 180         struct gru_thread_state *ts;
 181         const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" };
 182
 183         if (gid == 0)
 184                 seq_printf(file, "#%5s%5s%6s%9s%6s%8s%8s\n", "gid", "bid",
 185                            "ctx#", "pid", "cbrs", "dsbytes", "mode");
 186         if (gru)
 187                 for (i = 0; i < GRU_NUM_CCH; i++) {
 188                         ts = gru->gs_gts[i];
 189                         if (!ts)
 190                                 continue;
 191                         seq_printf(file, " %5d%5d%6d%9d%6d%8d%8s\n",
 192                                    gru->gs_gid, gru->gs_blade_id, i,
 193                                    ts->ts_tgid_owner,
 194                                    ts->ts_cbr_au_count * GRU_CBR_AU_SIZE,
 195                                    ts->ts_cbr_au_count * GRU_DSR_AU_BYTES,
 196                                    mode[ts->ts_user_options &
 197                                         GRU_OPT_MISS_MASK]);
 198                 }
 199
 200         return 0;
 201 }
 202
 203 static int gru_seq_show(struct seq_file *file, void *data)
 204 {
 205         long gid = *(long *)data, ctxfree, cbrfree, dsrfree;
 206         struct gru_state *gru = GID_TO_GRU(gid);
 207
 208         if (gid == 0) {
 209                 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "gid", "nid",
 210                            "ctx", "cbr", "dsr", "ctx", "cbr", "dsr");
 211                 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "", "", "busy",
 212                            "busy", "busy", "free", "free", "free");
 213         }
 214         if (gru) {
 215                 ctxfree = GRU_NUM_CCH - gru->gs_active_contexts;
 216                 cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
 217                 dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
 218                 seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n",
 219                            gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree,
 220                            GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree,
 221                            ctxfree, cbrfree, dsrfree);
 222         }
 223
 224         return 0;
 225 }
 226
 227 static void seq_stop(struct seq_file *file, void *data)
 228 {
 229 }
 230
 231 static void *seq_start(struct seq_file *file, loff_t *gid)
 232 {
 233         if (*gid < gru_max_gids)
 234                 return gid;
 235         return NULL;
 236 }
 237
 238 static void *seq_next(struct seq_file *file, void *data, loff_t *gid)
 239 {
 240         (*gid)++;
 241         if (*gid < gru_max_gids)
 242                 return gid;
 243         return NULL;
 244 }
 245
 246 static const struct seq_operations cch_seq_ops = {
 247         .start  = seq_start,
 248         .next   = seq_next,
 249         .stop   = seq_stop,
 250         .show   = cch_seq_show
 251 };
 252
 253 static const struct seq_operations gru_seq_ops = {
 254         .start  = seq_start,
 255         .next   = seq_next,
 256         .stop   = seq_stop,
 257         .show   = gru_seq_show
 258 };
 259
 260 static int statistics_open(struct inode *inode, struct file *file)
 261 {
 262         return single_open(file, statistics_show, NULL);
 263 }
 264
 265 static int mcs_statistics_open(struct inode *inode, struct file *file)
 266 {
 267         return single_open(file, mcs_statistics_show, NULL);
 268 }
 269
 270 static int options_open(struct inode *inode, struct file *file)
 271 {
 272         return single_open(file, options_show, NULL);
 273 }
 274
 275 static int cch_open(struct inode *inode, struct file *file)
 276 {
 277         return seq_open(file, &cch_seq_ops);
 278 }
 279
 280 static int gru_open(struct inode *inode, struct file *file)
 281 {
 282         return seq_open(file, &gru_seq_ops);
 283 }
 284
 285 /* *INDENT-OFF* */
 286 static const struct file_operations statistics_fops = {
 287         .open           = statistics_open,
 288         .read           = seq_read,
 289         .write          = statistics_write,
 290         .llseek         = seq_lseek,
 291         .release        = single_release,
 292 };
 293
 294 static const struct file_operations mcs_statistics_fops = {
 295         .open           = mcs_statistics_open,
 296         .read           = seq_read,
 297         .write          = mcs_statistics_write,
 298         .llseek         = seq_lseek,
 299         .release        = single_release,
 300 };
 301
 302 static const struct file_operations options_fops = {
 303         .open           = options_open,
 304         .read           = seq_read,
 305         .write          = options_write,
 306         .llseek         = seq_lseek,
 307         .release        = single_release,
 308 };
 309
 310 static const struct file_operations cch_fops = {
 311         .open           = cch_open,
 312         .read           = seq_read,
 313         .llseek         = seq_lseek,
 314         .release        = seq_release,
 315 };
 316 static const struct file_operations gru_fops = {
 317         .open           = gru_open,
 318         .read           = seq_read,
 319         .llseek         = seq_lseek,
 320         .release        = seq_release,
 321 };
 322
 323 static struct proc_entry {
 324         char *name;
 325         int mode;
 326         const struct file_operations *fops;
 327         struct proc_dir_entry *entry;
 328 } proc_files[] = {
 329         {"statistics", 0644, &statistics_fops},
 330         {"mcs_statistics", 0644, &mcs_statistics_fops},
 331         {"debug_options", 0644, &options_fops},
 332         {"cch_status", 0444, &cch_fops},
 333         {"gru_status", 0444, &gru_fops},
 334         {NULL}
 335 };
 336 /* *INDENT-ON* */
 337
 338 static struct proc_dir_entry *proc_gru __read_mostly;
 339
 340 static int create_proc_file(struct proc_entry *p)
 341 {
 342         p->entry = create_proc_entry(p->name, p->mode, proc_gru);
 343         if (!p->entry)
 344                 return -1;
 345         p->entry->proc_fops = p->fops;
 346         return 0;
 347 }
 348
 349 static void delete_proc_files(void)
 350 {
 351         struct proc_entry *p;
 352
 353         if (proc_gru) {
 354                 for (p = proc_files; p->name; p++)
 355                         if (p->entry)
 356                                 remove_proc_entry(p->name, proc_gru);
 357                 remove_proc_entry("gru", NULL);
 358         }
 359 }
 360
 361 int gru_proc_init(void)
 362 {
 363         struct proc_entry *p;
 364
 365         proc_gru = proc_mkdir("sgi_uv/gru", NULL);
 366
 367         for (p = proc_files; p->name; p++)
 368                 if (create_proc_file(p))
 369                         goto err;
 370         return 0;
 371
 372 err:
 373         delete_proc_files();
 374         return -1;
 375 }
 376
 377 void gru_proc_exit(void)
 378 {
 379         delete_proc_files();
 380 }