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_context);
  55         printstat(s, unload_context);
  56         printstat(s, steal_context);
  57         printstat(s, steal_context_failed);
  58         printstat(s, nopfn);
  59         printstat(s, break_cow);
  60         printstat(s, asid_new);
  61         printstat(s, asid_next);
  62         printstat(s, asid_wrap);
  63         printstat(s, asid_reuse);
  64         printstat(s, intr);
  65         printstat(s, intr_mm_lock_failed);
  66         printstat(s, call_os);
  67         printstat(s, call_os_offnode_reference);
  68         printstat(s, call_os_check_for_bug);
  69         printstat(s, call_os_wait_queue);
  70         printstat(s, user_flush_tlb);
  71         printstat(s, user_unload_context);
  72         printstat(s, user_exception);
  73         printstat(s, set_task_slice);
  74         printstat(s, migrate_check);
  75         printstat(s, migrated_retarget);
  76         printstat(s, migrated_unload);
  77         printstat(s, migrated_unload_delay);
  78         printstat(s, migrated_nopfn_retarget);
  79         printstat(s, migrated_nopfn_unload);
  80         printstat(s, tlb_dropin);
  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, mmu_invalidate_range);
  88         printstat(s, mmu_invalidate_page);
  89         printstat(s, mmu_clear_flush_young);
  90         printstat(s, flush_tlb);
  91         printstat(s, flush_tlb_gru);
  92         printstat(s, flush_tlb_gru_tgh);
  93         printstat(s, flush_tlb_gru_zero_asid);
  94         printstat(s, copy_gpa);
  95         printstat(s, mesq_receive);
  96         printstat(s, mesq_receive_none);
  97         printstat(s, mesq_send);
  98         printstat(s, mesq_send_failed);
  99         printstat(s, mesq_noop);
 100         printstat(s, mesq_send_unexpected_error);
 101         printstat(s, mesq_send_lb_overflow);
 102         printstat(s, mesq_send_qlimit_reached);
 103         printstat(s, mesq_send_amo_nacked);
 104         printstat(s, mesq_send_put_nacked);
 105         printstat(s, mesq_qf_not_full);
 106         printstat(s, mesq_qf_locked);
 107         printstat(s, mesq_qf_noop_not_full);
 108         printstat(s, mesq_qf_switch_head_failed);
 109         printstat(s, mesq_qf_unexpected_error);
 110         printstat(s, mesq_noop_unexpected_error);
 111         printstat(s, mesq_noop_lb_overflow);
 112         printstat(s, mesq_noop_qlimit_reached);
 113         printstat(s, mesq_noop_amo_nacked);
 114         printstat(s, mesq_noop_put_nacked);
 115         return 0;
 116 }
 117
 118 static ssize_t statistics_write(struct file *file, const char __user *userbuf,
 119                                 size_t count, loff_t *data)
 120 {
 121         memset(&gru_stats, 0, sizeof(gru_stats));
 122         return count;
 123 }
 124
 125 static int mcs_statistics_show(struct seq_file *s, void *p)
 126 {
 127         int op;
 128         unsigned long total, count, max;
 129         static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt",
 130                 "cch_interrupt_sync", "cch_deallocate", "tgh_invalidate"};
 131
 132         for (op = 0; op < mcsop_last; op++) {
 133                 count = atomic_long_read(&mcs_op_statistics[op].count);
 134                 total = atomic_long_read(&mcs_op_statistics[op].total);
 135                 max = mcs_op_statistics[op].max;
 136                 seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count,
 137                            count ? total / count : 0, max);
 138         }
 139         return 0;
 140 }
 141
 142 static ssize_t mcs_statistics_write(struct file *file,
 143                         const char __user *userbuf, size_t count, loff_t *data)
 144 {
 145         memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics));
 146         return count;
 147 }
 148
 149 static int options_show(struct seq_file *s, void *p)
 150 {
 151         seq_printf(s, "0x%lx\n", gru_options);
 152         return 0;
 153 }
 154
 155 static ssize_t options_write(struct file *file, const char __user *userbuf,
 156                              size_t count, loff_t *data)
 157 {
 158         unsigned long val;
 159         char buf[80];
 160
 161         if (copy_from_user
 162             (buf, userbuf, count < sizeof(buf) ? count : sizeof(buf)))
 163                 return -EFAULT;
 164         buf[count - 1] = '\0';
 165         if (!strict_strtoul(buf, 10, &val))
 166                 gru_options = val;
 167
 168         return count;
 169 }
 170
 171 static int cch_seq_show(struct seq_file *file, void *data)
 172 {
 173         long gid = *(long *)data;
 174         int i;
 175         struct gru_state *gru = GID_TO_GRU(gid);
 176         struct gru_thread_state *ts;
 177         const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" };
 178
 179         if (gid == 0)
 180                 seq_printf(file, "#%5s%5s%6s%9s%6s%8s%8s\n", "gid", "bid",
 181                            "ctx#", "pid", "cbrs", "dsbytes", "mode");
 182         if (gru)
 183                 for (i = 0; i < GRU_NUM_CCH; i++) {
 184                         ts = gru->gs_gts[i];
 185                         if (!ts)
 186                                 continue;
 187                         seq_printf(file, " %5d%5d%6d%9d%6d%8d%8s\n",
 188                                    gru->gs_gid, gru->gs_blade_id, i,
 189                                    ts->ts_tgid_owner,
 190                                    ts->ts_cbr_au_count * GRU_CBR_AU_SIZE,
 191                                    ts->ts_cbr_au_count * GRU_DSR_AU_BYTES,
 192                                    mode[ts->ts_user_options &
 193                                         GRU_OPT_MISS_MASK]);
 194                 }
 195
 196         return 0;
 197 }
 198
 199 static int gru_seq_show(struct seq_file *file, void *data)
 200 {
 201         long gid = *(long *)data, ctxfree, cbrfree, dsrfree;
 202         struct gru_state *gru = GID_TO_GRU(gid);
 203
 204         if (gid == 0) {
 205                 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "gid", "nid",
 206                            "ctx", "cbr", "dsr", "ctx", "cbr", "dsr");
 207                 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "", "", "busy",
 208                            "busy", "busy", "free", "free", "free");
 209         }
 210         if (gru) {
 211                 ctxfree = GRU_NUM_CCH - gru->gs_active_contexts;
 212                 cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
 213                 dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
 214                 seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n",
 215                            gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree,
 216                            GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree,
 217                            ctxfree, cbrfree, dsrfree);
 218         }
 219
 220         return 0;
 221 }
 222
 223 static void seq_stop(struct seq_file *file, void *data)
 224 {
 225 }
 226
 227 static void *seq_start(struct seq_file *file, loff_t *gid)
 228 {
 229         if (*gid < gru_max_gids)
 230                 return gid;
 231         return NULL;
 232 }
 233
 234 static void *seq_next(struct seq_file *file, void *data, loff_t *gid)
 235 {
 236         (*gid)++;
 237         if (*gid < gru_max_gids)
 238                 return gid;
 239         return NULL;
 240 }
 241
 242 static const struct seq_operations cch_seq_ops = {
 243         .start  = seq_start,
 244         .next   = seq_next,
 245         .stop   = seq_stop,
 246         .show   = cch_seq_show
 247 };
 248
 249 static const struct seq_operations gru_seq_ops = {
 250         .start  = seq_start,
 251         .next   = seq_next,
 252         .stop   = seq_stop,
 253         .show   = gru_seq_show
 254 };
 255
 256 static int statistics_open(struct inode *inode, struct file *file)
 257 {
 258         return single_open(file, statistics_show, NULL);
 259 }
 260
 261 static int mcs_statistics_open(struct inode *inode, struct file *file)
 262 {
 263         return single_open(file, mcs_statistics_show, NULL);
 264 }
 265
 266 static int options_open(struct inode *inode, struct file *file)
 267 {
 268         return single_open(file, options_show, NULL);
 269 }
 270
 271 static int cch_open(struct inode *inode, struct file *file)
 272 {
 273         return seq_open(file, &cch_seq_ops);
 274 }
 275
 276 static int gru_open(struct inode *inode, struct file *file)
 277 {
 278         return seq_open(file, &gru_seq_ops);
 279 }
 280
 281 /* *INDENT-OFF* */
 282 static const struct file_operations statistics_fops = {
 283         .open           = statistics_open,
 284         .read           = seq_read,
 285         .write          = statistics_write,
 286         .llseek         = seq_lseek,
 287         .release        = single_release,
 288 };
 289
 290 static const struct file_operations mcs_statistics_fops = {
 291         .open           = mcs_statistics_open,
 292         .read           = seq_read,
 293         .write          = mcs_statistics_write,
 294         .llseek         = seq_lseek,
 295         .release        = single_release,
 296 };
 297
 298 static const struct file_operations options_fops = {
 299         .open           = options_open,
 300         .read           = seq_read,
 301         .write          = options_write,
 302         .llseek         = seq_lseek,
 303         .release        = single_release,
 304 };
 305
 306 static const struct file_operations cch_fops = {
 307         .open           = cch_open,
 308         .read           = seq_read,
 309         .llseek         = seq_lseek,
 310         .release        = seq_release,
 311 };
 312 static const struct file_operations gru_fops = {
 313         .open           = gru_open,
 314         .read           = seq_read,
 315         .llseek         = seq_lseek,
 316         .release        = seq_release,
 317 };
 318
 319 static struct proc_entry {
 320         char *name;
 321         int mode;
 322         const struct file_operations *fops;
 323         struct proc_dir_entry *entry;
 324 } proc_files[] = {
 325         {"statistics", 0644, &statistics_fops},
 326         {"mcs_statistics", 0644, &mcs_statistics_fops},
 327         {"debug_options", 0644, &options_fops},
 328         {"cch_status", 0444, &cch_fops},
 329         {"gru_status", 0444, &gru_fops},
 330         {NULL}
 331 };
 332 /* *INDENT-ON* */
 333
 334 static struct proc_dir_entry *proc_gru __read_mostly;
 335
 336 static int create_proc_file(struct proc_entry *p)
 337 {
 338         p->entry = create_proc_entry(p->name, p->mode, proc_gru);
 339         if (!p->entry)
 340                 return -1;
 341         p->entry->proc_fops = p->fops;
 342         return 0;
 343 }
 344
 345 static void delete_proc_files(void)
 346 {
 347         struct proc_entry *p;
 348
 349         if (proc_gru) {
 350                 for (p = proc_files; p->name; p++)
 351                         if (p->entry)
 352                                 remove_proc_entry(p->name, proc_gru);
 353                 remove_proc_entry("gru", NULL);
 354         }
 355 }
 356
 357 int gru_proc_init(void)
 358 {
 359         struct proc_entry *p;
 360
 361         proc_gru = proc_mkdir("sgi_uv/gru", NULL);
 362
 363         for (p = proc_files; p->name; p++)
 364                 if (create_proc_file(p))
 365                         goto err;
 366         return 0;
 367
 368 err:
 369         delete_proc_files();
 370         return -1;
 371 }
 372
 373 void gru_proc_exit(void)
 374 {
 375         delete_proc_files();
 376 }