linux/drivers/misc/sgi-gru/gruprocfs.c
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   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
  35static void printstat_val(struct seq_file *s, atomic_long_t *v, char *id)
  36{
  37        unsigned long val = atomic_long_read(v);
  38
  39        seq_printf(s, "%16lu %s\n", val, id);
  40}
  41
  42static int statistics_show(struct seq_file *s, void *p)
  43{
  44        printstat(s, vdata_alloc);
  45        printstat(s, vdata_free);
  46        printstat(s, gts_alloc);
  47        printstat(s, gts_free);
  48        printstat(s, gms_alloc);
  49        printstat(s, gms_free);
  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, asid_new);
  63        printstat(s, asid_next);
  64        printstat(s, asid_wrap);
  65        printstat(s, asid_reuse);
  66        printstat(s, intr);
  67        printstat(s, intr_cbr);
  68        printstat(s, intr_tfh);
  69        printstat(s, intr_spurious);
  70        printstat(s, intr_mm_lock_failed);
  71        printstat(s, call_os);
  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, check_context_retarget_intr);
  78        printstat(s, check_context_unload);
  79        printstat(s, tlb_dropin);
  80        printstat(s, tlb_preload_page);
  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, tlb_dropin_fail_no_exception);
  88        printstat(s, tfh_stale_on_fault);
  89        printstat(s, mmu_invalidate_range);
  90        printstat(s, mmu_invalidate_page);
  91        printstat(s, flush_tlb);
  92        printstat(s, flush_tlb_gru);
  93        printstat(s, flush_tlb_gru_tgh);
  94        printstat(s, flush_tlb_gru_zero_asid);
  95        printstat(s, copy_gpa);
  96        printstat(s, read_gpa);
  97        printstat(s, mesq_receive);
  98        printstat(s, mesq_receive_none);
  99        printstat(s, mesq_send);
 100        printstat(s, mesq_send_failed);
 101        printstat(s, mesq_noop);
 102        printstat(s, mesq_send_unexpected_error);
 103        printstat(s, mesq_send_lb_overflow);
 104        printstat(s, mesq_send_qlimit_reached);
 105        printstat(s, mesq_send_amo_nacked);
 106        printstat(s, mesq_send_put_nacked);
 107        printstat(s, mesq_qf_locked);
 108        printstat(s, mesq_qf_noop_not_full);
 109        printstat(s, mesq_qf_switch_head_failed);
 110        printstat(s, mesq_qf_unexpected_error);
 111        printstat(s, mesq_noop_unexpected_error);
 112        printstat(s, mesq_noop_lb_overflow);
 113        printstat(s, mesq_noop_qlimit_reached);
 114        printstat(s, mesq_noop_amo_nacked);
 115        printstat(s, mesq_noop_put_nacked);
 116        printstat(s, mesq_noop_page_overflow);
 117        return 0;
 118}
 119
 120static ssize_t statistics_write(struct file *file, const char __user *userbuf,
 121                                size_t count, loff_t *data)
 122{
 123        memset(&gru_stats, 0, sizeof(gru_stats));
 124        return count;
 125}
 126
 127static int mcs_statistics_show(struct seq_file *s, void *p)
 128{
 129        int op;
 130        unsigned long total, count, max;
 131        static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt",
 132                "cch_interrupt_sync", "cch_deallocate", "tfh_write_only",
 133                "tfh_write_restart", "tgh_invalidate"};
 134
 135        seq_printf(s, "%-20s%12s%12s%12s\n", "#id", "count", "aver-clks", "max-clks");
 136        for (op = 0; op < mcsop_last; op++) {
 137                count = atomic_long_read(&mcs_op_statistics[op].count);
 138                total = atomic_long_read(&mcs_op_statistics[op].total);
 139                max = mcs_op_statistics[op].max;
 140                seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count,
 141                           count ? total / count : 0, max);
 142        }
 143        return 0;
 144}
 145
 146static ssize_t mcs_statistics_write(struct file *file,
 147                        const char __user *userbuf, size_t count, loff_t *data)
 148{
 149        memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics));
 150        return count;
 151}
 152
 153static int options_show(struct seq_file *s, void *p)
 154{
 155        seq_printf(s, "#bitmask: 1=trace, 2=statistics\n");
 156        seq_printf(s, "0x%lx\n", gru_options);
 157        return 0;
 158}
 159
 160static ssize_t options_write(struct file *file, const char __user *userbuf,
 161                             size_t count, loff_t *data)
 162{
 163        char buf[20];
 164
 165        if (count >= sizeof(buf))
 166                return -EINVAL;
 167        if (copy_from_user(buf, userbuf, count))
 168                return -EFAULT;
 169        buf[count] = '\0';
 170        if (strict_strtoul(buf, 0, &gru_options))
 171                return -EINVAL;
 172
 173        return count;
 174}
 175
 176static int cch_seq_show(struct seq_file *file, void *data)
 177{
 178        long gid = *(long *)data;
 179        int i;
 180        struct gru_state *gru = GID_TO_GRU(gid);
 181        struct gru_thread_state *ts;
 182        const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" };
 183
 184        if (gid == 0)
 185                seq_printf(file, "#%5s%5s%6s%7s%9s%6s%8s%8s\n", "gid", "bid",
 186                           "ctx#", "asid", "pid", "cbrs", "dsbytes", "mode");
 187        if (gru)
 188                for (i = 0; i < GRU_NUM_CCH; i++) {
 189                        ts = gru->gs_gts[i];
 190                        if (!ts)
 191                                continue;
 192                        seq_printf(file, " %5d%5d%6d%7d%9d%6d%8d%8s\n",
 193                                   gru->gs_gid, gru->gs_blade_id, i,
 194                                   is_kernel_context(ts) ? 0 : ts->ts_gms->ms_asids[gid].mt_asid,
 195                                   is_kernel_context(ts) ? 0 : 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
 205static 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
 229static void seq_stop(struct seq_file *file, void *data)
 230{
 231}
 232
 233static 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
 240static 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
 248static 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
 255static 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
 262static int statistics_open(struct inode *inode, struct file *file)
 263{
 264        return single_open(file, statistics_show, NULL);
 265}
 266
 267static int mcs_statistics_open(struct inode *inode, struct file *file)
 268{
 269        return single_open(file, mcs_statistics_show, NULL);
 270}
 271
 272static int options_open(struct inode *inode, struct file *file)
 273{
 274        return single_open(file, options_show, NULL);
 275}
 276
 277static int cch_open(struct inode *inode, struct file *file)
 278{
 279        return seq_open(file, &cch_seq_ops);
 280}
 281
 282static int gru_open(struct inode *inode, struct file *file)
 283{
 284        return seq_open(file, &gru_seq_ops);
 285}
 286
 287/* *INDENT-OFF* */
 288static 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
 296static 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
 304static 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
 312static const struct file_operations cch_fops = {
 313        .open           = cch_open,
 314        .read           = seq_read,
 315        .llseek         = seq_lseek,
 316        .release        = seq_release,
 317};
 318static const struct file_operations gru_fops = {
 319        .open           = gru_open,
 320        .read           = seq_read,
 321        .llseek         = seq_lseek,
 322        .release        = seq_release,
 323};
 324
 325static struct proc_entry {
 326        char *name;
 327        umode_t 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
 340static struct proc_dir_entry *proc_gru __read_mostly;
 341
 342static 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
 350static 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                proc_remove(proc_gru);
 359        }
 360}
 361
 362int 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
 373err:
 374        delete_proc_files();
 375        return -1;
 376}
 377
 378void gru_proc_exit(void)
 379{
 380        delete_proc_files();
 381}
 382