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 } 337