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