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 options_show(struct seq_file *s, void *p)
 126 {
 127         seq_printf(s, "0x%lx\n", gru_options);
 128         return 0;
 129 }
 130
 131 static ssize_t options_write(struct file *file, const char __user *userbuf,
 132                              size_t count, loff_t *data)
 133 {
 134         unsigned long val;
 135         char buf[80];
 136
 137         if (copy_from_user
 138             (buf, userbuf, count < sizeof(buf) ? count : sizeof(buf)))
 139                 return -EFAULT;
 140         if (!strict_strtoul(buf, 10, &val))
 141                 gru_options = val;
 142
 143         return count;
 144 }
 145
 146 static int cch_seq_show(struct seq_file *file, void *data)
 147 {
 148         long gid = *(long *)data;
 149         int i;
 150         struct gru_state *gru = GID_TO_GRU(gid);
 151         struct gru_thread_state *ts;
 152         const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" };
 153
 154         if (gid == 0)
 155                 seq_printf(file, "#%5s%5s%6s%9s%6s%8s%8s\n", "gid", "bid",
 156                            "ctx#", "pid", "cbrs", "dsbytes", "mode");
 157         if (gru)
 158                 for (i = 0; i < GRU_NUM_CCH; i++) {
 159                         ts = gru->gs_gts[i];
 160                         if (!ts)
 161                                 continue;
 162                         seq_printf(file, " %5d%5d%6d%9d%6d%8d%8s\n",
 163                                    gru->gs_gid, gru->gs_blade_id, i,
 164                                    ts->ts_tgid_owner,
 165                                    ts->ts_cbr_au_count * GRU_CBR_AU_SIZE,
 166                                    ts->ts_cbr_au_count * GRU_DSR_AU_BYTES,
 167                                    mode[ts->ts_user_options &
 168                                         GRU_OPT_MISS_MASK]);
 169                 }
 170
 171         return 0;
 172 }
 173
 174 static int gru_seq_show(struct seq_file *file, void *data)
 175 {
 176         long gid = *(long *)data, ctxfree, cbrfree, dsrfree;
 177         struct gru_state *gru = GID_TO_GRU(gid);
 178
 179         if (gid == 0) {
 180                 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "gid", "nid",
 181                            "ctx", "cbr", "dsr", "ctx", "cbr", "dsr");
 182                 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "", "", "busy",
 183                            "busy", "busy", "free", "free", "free");
 184         }
 185         if (gru) {
 186                 ctxfree = GRU_NUM_CCH - gru->gs_active_contexts;
 187                 cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
 188                 dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
 189                 seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n",
 190                            gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree,
 191                            GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree,
 192                            ctxfree, cbrfree, dsrfree);
 193         }
 194
 195         return 0;
 196 }
 197
 198 static void seq_stop(struct seq_file *file, void *data)
 199 {
 200 }
 201
 202 static void *seq_start(struct seq_file *file, loff_t *gid)
 203 {
 204         if (*gid < GRU_MAX_GRUS)
 205                 return gid;
 206         return NULL;
 207 }
 208
 209 static void *seq_next(struct seq_file *file, void *data, loff_t *gid)
 210 {
 211         (*gid)++;
 212         if (*gid < GRU_MAX_GRUS)
 213                 return gid;
 214         return NULL;
 215 }
 216
 217 static const struct seq_operations cch_seq_ops = {
 218         .start  = seq_start,
 219         .next   = seq_next,
 220         .stop   = seq_stop,
 221         .show   = cch_seq_show
 222 };
 223
 224 static const struct seq_operations gru_seq_ops = {
 225         .start  = seq_start,
 226         .next   = seq_next,
 227         .stop   = seq_stop,
 228         .show   = gru_seq_show
 229 };
 230
 231 static int statistics_open(struct inode *inode, struct file *file)
 232 {
 233         return single_open(file, statistics_show, NULL);
 234 }
 235
 236 static int options_open(struct inode *inode, struct file *file)
 237 {
 238         return single_open(file, options_show, NULL);
 239 }
 240
 241 static int cch_open(struct inode *inode, struct file *file)
 242 {
 243         return seq_open(file, &cch_seq_ops);
 244 }
 245
 246 static int gru_open(struct inode *inode, struct file *file)
 247 {
 248         return seq_open(file, &gru_seq_ops);
 249 }
 250
 251 /* *INDENT-OFF* */
 252 static const struct file_operations statistics_fops = {
 253         .open           = statistics_open,
 254         .read           = seq_read,
 255         .write          = statistics_write,
 256         .llseek         = seq_lseek,
 257         .release        = single_release,
 258 };
 259
 260 static const struct file_operations options_fops = {
 261         .open           = options_open,
 262         .read           = seq_read,
 263         .write          = options_write,
 264         .llseek         = seq_lseek,
 265         .release        = single_release,
 266 };
 267
 268 static const struct file_operations cch_fops = {
 269         .open           = cch_open,
 270         .read           = seq_read,
 271         .llseek         = seq_lseek,
 272         .release        = seq_release,
 273 };
 274 static const struct file_operations gru_fops = {
 275         .open           = gru_open,
 276         .read           = seq_read,
 277         .llseek         = seq_lseek,
 278         .release        = seq_release,
 279 };
 280
 281 static struct proc_entry {
 282         char *name;
 283         int mode;
 284         const struct file_operations *fops;
 285         struct proc_dir_entry *entry;
 286 } proc_files[] = {
 287         {"statistics", 0644, &statistics_fops},
 288         {"debug_options", 0644, &options_fops},
 289         {"cch_status", 0444, &cch_fops},
 290         {"gru_status", 0444, &gru_fops},
 291         {NULL}
 292 };
 293 /* *INDENT-ON* */
 294
 295 static struct proc_dir_entry *proc_gru __read_mostly;
 296
 297 static int create_proc_file(struct proc_entry *p)
 298 {
 299         p->entry = create_proc_entry(p->name, p->mode, proc_gru);
 300         if (!p->entry)
 301                 return -1;
 302         p->entry->proc_fops = p->fops;
 303         return 0;
 304 }
 305
 306 static void delete_proc_files(void)
 307 {
 308         struct proc_entry *p;
 309
 310         if (proc_gru) {
 311                 for (p = proc_files; p->name; p++)
 312                         if (p->entry)
 313                                 remove_proc_entry(p->name, proc_gru);
 314                 remove_proc_entry("gru", NULL);
 315         }
 316 }
 317
 318 int gru_proc_init(void)
 319 {
 320         struct proc_entry *p;
 321
 322         proc_gru = proc_mkdir("sgi_uv/gru", NULL);
 323
 324         for (p = proc_files; p->name; p++)
 325                 if (create_proc_file(p))
 326                         goto err;
 327         return 0;
 328
 329 err:
 330         delete_proc_files();
 331         return -1;
 332 }
 333
 334 void gru_proc_exit(void)
 335 {
 336         delete_proc_files();
 337 }