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 seq_printf(s, "%16lu %s\n", val, id); 40 } 41 42 static 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 } 119 120 static 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 } 126 127 static 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 } 145 146 static 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 } 152 153 static 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 } 159 160 static ssize_t options_write(struct file *file, const char __user *userbuf, 161 size_t count, loff_t *data) 162 { 163 int ret; 164 165 ret = kstrtoul_from_user(userbuf, count, 0, &gru_options); 166 if (ret) 167 return ret; 168 169 return count; 170 } 171 172 static int cch_seq_show(struct seq_file *file, void *data) 173 { 174 long gid = *(long *)data; 175 int i; 176 struct gru_state *gru = GID_TO_GRU(gid); 177 struct gru_thread_state *ts; 178 const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" }; 179 180 if (gid == 0) 181 seq_printf(file, "#%5s%5s%6s%7s%9s%6s%8s%8s\n", "gid", "bid", 182 "ctx#", "asid", "pid", "cbrs", "dsbytes", "mode"); 183 if (gru) 184 for (i = 0; i < GRU_NUM_CCH; i++) { 185 ts = gru->gs_gts[i]; 186 if (!ts) 187 continue; 188 seq_printf(file, " %5d%5d%6d%7d%9d%6d%8d%8s\n", 189 gru->gs_gid, gru->gs_blade_id, i, 190 is_kernel_context(ts) ? 0 : ts->ts_gms->ms_asids[gid].mt_asid, 191 is_kernel_context(ts) ? 0 : ts->ts_tgid_owner, 192 ts->ts_cbr_au_count * GRU_CBR_AU_SIZE, 193 ts->ts_cbr_au_count * GRU_DSR_AU_BYTES, 194 mode[ts->ts_user_options & 195 GRU_OPT_MISS_MASK]); 196 } 197 198 return 0; 199 } 200 201 static int gru_seq_show(struct seq_file *file, void *data) 202 { 203 long gid = *(long *)data, ctxfree, cbrfree, dsrfree; 204 struct gru_state *gru = GID_TO_GRU(gid); 205 206 if (gid == 0) { 207 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "gid", "nid", 208 "ctx", "cbr", "dsr", "ctx", "cbr", "dsr"); 209 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "", "", "busy", 210 "busy", "busy", "free", "free", "free"); 211 } 212 if (gru) { 213 ctxfree = GRU_NUM_CCH - gru->gs_active_contexts; 214 cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE; 215 dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES; 216 seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n", 217 gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree, 218 GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree, 219 ctxfree, cbrfree, dsrfree); 220 } 221 222 return 0; 223 } 224 225 static void seq_stop(struct seq_file *file, void *data) 226 { 227 } 228 229 static void *seq_start(struct seq_file *file, loff_t *gid) 230 { 231 if (*gid < gru_max_gids) 232 return gid; 233 return NULL; 234 } 235 236 static void *seq_next(struct seq_file *file, void *data, loff_t *gid) 237 { 238 (*gid)++; 239 if (*gid < gru_max_gids) 240 return gid; 241 return NULL; 242 } 243 244 static const struct seq_operations cch_seq_ops = { 245 .start = seq_start, 246 .next = seq_next, 247 .stop = seq_stop, 248 .show = cch_seq_show 249 }; 250 251 static const struct seq_operations gru_seq_ops = { 252 .start = seq_start, 253 .next = seq_next, 254 .stop = seq_stop, 255 .show = gru_seq_show 256 }; 257 258 static int statistics_open(struct inode *inode, struct file *file) 259 { 260 return single_open(file, statistics_show, NULL); 261 } 262 263 static int mcs_statistics_open(struct inode *inode, struct file *file) 264 { 265 return single_open(file, mcs_statistics_show, NULL); 266 } 267 268 static int options_open(struct inode *inode, struct file *file) 269 { 270 return single_open(file, options_show, NULL); 271 } 272 273 static int cch_open(struct inode *inode, struct file *file) 274 { 275 return seq_open(file, &cch_seq_ops); 276 } 277 278 static int gru_open(struct inode *inode, struct file *file) 279 { 280 return seq_open(file, &gru_seq_ops); 281 } 282 283 /* *INDENT-OFF* */ 284 static const struct file_operations statistics_fops = { 285 .open = statistics_open, 286 .read = seq_read, 287 .write = statistics_write, 288 .llseek = seq_lseek, 289 .release = single_release, 290 }; 291 292 static const struct file_operations mcs_statistics_fops = { 293 .open = mcs_statistics_open, 294 .read = seq_read, 295 .write = mcs_statistics_write, 296 .llseek = seq_lseek, 297 .release = single_release, 298 }; 299 300 static const struct file_operations options_fops = { 301 .open = options_open, 302 .read = seq_read, 303 .write = options_write, 304 .llseek = seq_lseek, 305 .release = single_release, 306 }; 307 308 static const struct file_operations cch_fops = { 309 .open = cch_open, 310 .read = seq_read, 311 .llseek = seq_lseek, 312 .release = seq_release, 313 }; 314 static const struct file_operations gru_fops = { 315 .open = gru_open, 316 .read = seq_read, 317 .llseek = seq_lseek, 318 .release = seq_release, 319 }; 320 321 static struct proc_entry { 322 char *name; 323 umode_t mode; 324 const struct file_operations *fops; 325 struct proc_dir_entry *entry; 326 } proc_files[] = { 327 {"statistics", 0644, &statistics_fops}, 328 {"mcs_statistics", 0644, &mcs_statistics_fops}, 329 {"debug_options", 0644, &options_fops}, 330 {"cch_status", 0444, &cch_fops}, 331 {"gru_status", 0444, &gru_fops}, 332 {NULL} 333 }; 334 /* *INDENT-ON* */ 335 336 static struct proc_dir_entry *proc_gru __read_mostly; 337 338 static int create_proc_file(struct proc_entry *p) 339 { 340 p->entry = proc_create(p->name, p->mode, proc_gru, p->fops); 341 if (!p->entry) 342 return -1; 343 return 0; 344 } 345 346 static void delete_proc_files(void) 347 { 348 struct proc_entry *p; 349 350 if (proc_gru) { 351 for (p = proc_files; p->name; p++) 352 if (p->entry) 353 remove_proc_entry(p->name, proc_gru); 354 proc_remove(proc_gru); 355 } 356 } 357 358 int gru_proc_init(void) 359 { 360 struct proc_entry *p; 361 362 proc_gru = proc_mkdir("sgi_uv/gru", NULL); 363 364 for (p = proc_files; p->name; p++) 365 if (create_proc_file(p)) 366 goto err; 367 return 0; 368 369 err: 370 delete_proc_files(); 371 return -1; 372 } 373 374 void gru_proc_exit(void) 375 { 376 delete_proc_files(); 377 } 378