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_context_option); 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, tfh_stale_on_fault); 93 printstat(s, mmu_invalidate_range); 94 printstat(s, mmu_invalidate_page); 95 printstat(s, mmu_clear_flush_young); 96 printstat(s, flush_tlb); 97 printstat(s, flush_tlb_gru); 98 printstat(s, flush_tlb_gru_tgh); 99 printstat(s, flush_tlb_gru_zero_asid); 100 printstat(s, copy_gpa); 101 printstat(s, mesq_receive); 102 printstat(s, mesq_receive_none); 103 printstat(s, mesq_send); 104 printstat(s, mesq_send_failed); 105 printstat(s, mesq_noop); 106 printstat(s, mesq_send_unexpected_error); 107 printstat(s, mesq_send_lb_overflow); 108 printstat(s, mesq_send_qlimit_reached); 109 printstat(s, mesq_send_amo_nacked); 110 printstat(s, mesq_send_put_nacked); 111 printstat(s, mesq_qf_not_full); 112 printstat(s, mesq_qf_locked); 113 printstat(s, mesq_qf_noop_not_full); 114 printstat(s, mesq_qf_switch_head_failed); 115 printstat(s, mesq_qf_unexpected_error); 116 printstat(s, mesq_noop_unexpected_error); 117 printstat(s, mesq_noop_lb_overflow); 118 printstat(s, mesq_noop_qlimit_reached); 119 printstat(s, mesq_noop_amo_nacked); 120 printstat(s, mesq_noop_put_nacked); 121 return 0; 122 } 123 124 static ssize_t statistics_write(struct file *file, const char __user *userbuf, 125 size_t count, loff_t *data) 126 { 127 memset(&gru_stats, 0, sizeof(gru_stats)); 128 return count; 129 } 130 131 static int mcs_statistics_show(struct seq_file *s, void *p) 132 { 133 int op; 134 unsigned long total, count, max; 135 static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt", 136 "cch_interrupt_sync", "cch_deallocate", "tgh_invalidate"}; 137 138 for (op = 0; op < mcsop_last; op++) { 139 count = atomic_long_read(&mcs_op_statistics[op].count); 140 total = atomic_long_read(&mcs_op_statistics[op].total); 141 max = mcs_op_statistics[op].max; 142 seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count, 143 count ? total / count : 0, max); 144 } 145 return 0; 146 } 147 148 static ssize_t mcs_statistics_write(struct file *file, 149 const char __user *userbuf, size_t count, loff_t *data) 150 { 151 memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics)); 152 return count; 153 } 154 155 static int options_show(struct seq_file *s, void *p) 156 { 157 seq_printf(s, "0x%lx\n", gru_options); 158 return 0; 159 } 160 161 static ssize_t options_write(struct file *file, const char __user *userbuf, 162 size_t count, loff_t *data) 163 { 164 char buf[20]; 165 166 if (count >= sizeof(buf)) 167 return -EINVAL; 168 if (copy_from_user(buf, userbuf, count)) 169 return -EFAULT; 170 buf[count] = '\0'; 171 if (strict_strtoul(buf, 0, &gru_options)) 172 return -EINVAL; 173 174 return count; 175 } 176 177 static int cch_seq_show(struct seq_file *file, void *data) 178 { 179 long gid = *(long *)data; 180 int i; 181 struct gru_state *gru = GID_TO_GRU(gid); 182 struct gru_thread_state *ts; 183 const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" }; 184 185 if (gid == 0) 186 seq_printf(file, "#%5s%5s%6s%9s%6s%8s%8s\n", "gid", "bid", 187 "ctx#", "pid", "cbrs", "dsbytes", "mode"); 188 if (gru) 189 for (i = 0; i < GRU_NUM_CCH; i++) { 190 ts = gru->gs_gts[i]; 191 if (!ts) 192 continue; 193 seq_printf(file, " %5d%5d%6d%9d%6d%8d%8s\n", 194 gru->gs_gid, gru->gs_blade_id, i, 195 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 } 204 205 static 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 } 228 229 static void seq_stop(struct seq_file *file, void *data) 230 { 231 } 232 233 static void *seq_start(struct seq_file *file, loff_t *gid) 234 { 235 if (*gid < gru_max_gids) 236 return gid; 237 return NULL; 238 } 239 240 static 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 } 247 248 static 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 }; 254 255 static 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 }; 261 262 static int statistics_open(struct inode *inode, struct file *file) 263 { 264 return single_open(file, statistics_show, NULL); 265 } 266 267 static int mcs_statistics_open(struct inode *inode, struct file *file) 268 { 269 return single_open(file, mcs_statistics_show, NULL); 270 } 271 272 static int options_open(struct inode *inode, struct file *file) 273 { 274 return single_open(file, options_show, NULL); 275 } 276 277 static int cch_open(struct inode *inode, struct file *file) 278 { 279 return seq_open(file, &cch_seq_ops); 280 } 281 282 static int gru_open(struct inode *inode, struct file *file) 283 { 284 return seq_open(file, &gru_seq_ops); 285 } 286 287 /* *INDENT-OFF* */ 288 static 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 }; 295 296 static 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 }; 303 304 static 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 }; 311 312 static const struct file_operations cch_fops = { 313 .open = cch_open, 314 .read = seq_read, 315 .llseek = seq_lseek, 316 .release = seq_release, 317 }; 318 static const struct file_operations gru_fops = { 319 .open = gru_open, 320 .read = seq_read, 321 .llseek = seq_lseek, 322 .release = seq_release, 323 }; 324 325 static struct proc_entry { 326 char *name; 327 int 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* */ 339 340 static struct proc_dir_entry *proc_gru __read_mostly; 341 342 static 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 } 349 350 static 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 remove_proc_entry("gru", NULL); 359 } 360 } 361 362 int 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; 372 373 err: 374 delete_proc_files(); 375 return -1; 376 } 377 378 void gru_proc_exit(void) 379 { 380 delete_proc_files(); 381 } 382