1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * SN Platform GRU Driver 4 * 5 * PROC INTERFACES 6 * 7 * This file supports the /proc interfaces for the GRU driver 8 * 9 * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved. 10 */ 11 12 #include <linux/proc_fs.h> 13 #include <linux/device.h> 14 #include <linux/seq_file.h> 15 #include <linux/uaccess.h> 16 #include "gru.h" 17 #include "grulib.h" 18 #include "grutables.h" 19 20 #define printstat(s, f) printstat_val(s, &gru_stats.f, #f) 21 22 static void printstat_val(struct seq_file *s, atomic_long_t *v, char *id) 23 { 24 unsigned long val = atomic_long_read(v); 25 26 seq_printf(s, "%16lu %s\n", val, id); 27 } 28 29 static int statistics_show(struct seq_file *s, void *p) 30 { 31 printstat(s, vdata_alloc); 32 printstat(s, vdata_free); 33 printstat(s, gts_alloc); 34 printstat(s, gts_free); 35 printstat(s, gms_alloc); 36 printstat(s, gms_free); 37 printstat(s, gts_double_allocate); 38 printstat(s, assign_context); 39 printstat(s, assign_context_failed); 40 printstat(s, free_context); 41 printstat(s, load_user_context); 42 printstat(s, load_kernel_context); 43 printstat(s, lock_kernel_context); 44 printstat(s, unlock_kernel_context); 45 printstat(s, steal_user_context); 46 printstat(s, steal_kernel_context); 47 printstat(s, steal_context_failed); 48 printstat(s, nopfn); 49 printstat(s, asid_new); 50 printstat(s, asid_next); 51 printstat(s, asid_wrap); 52 printstat(s, asid_reuse); 53 printstat(s, intr); 54 printstat(s, intr_cbr); 55 printstat(s, intr_tfh); 56 printstat(s, intr_spurious); 57 printstat(s, intr_mm_lock_failed); 58 printstat(s, call_os); 59 printstat(s, call_os_wait_queue); 60 printstat(s, user_flush_tlb); 61 printstat(s, user_unload_context); 62 printstat(s, user_exception); 63 printstat(s, set_context_option); 64 printstat(s, check_context_retarget_intr); 65 printstat(s, check_context_unload); 66 printstat(s, tlb_dropin); 67 printstat(s, tlb_preload_page); 68 printstat(s, tlb_dropin_fail_no_asid); 69 printstat(s, tlb_dropin_fail_upm); 70 printstat(s, tlb_dropin_fail_invalid); 71 printstat(s, tlb_dropin_fail_range_active); 72 printstat(s, tlb_dropin_fail_idle); 73 printstat(s, tlb_dropin_fail_fmm); 74 printstat(s, tlb_dropin_fail_no_exception); 75 printstat(s, tfh_stale_on_fault); 76 printstat(s, mmu_invalidate_range); 77 printstat(s, mmu_invalidate_page); 78 printstat(s, flush_tlb); 79 printstat(s, flush_tlb_gru); 80 printstat(s, flush_tlb_gru_tgh); 81 printstat(s, flush_tlb_gru_zero_asid); 82 printstat(s, copy_gpa); 83 printstat(s, read_gpa); 84 printstat(s, mesq_receive); 85 printstat(s, mesq_receive_none); 86 printstat(s, mesq_send); 87 printstat(s, mesq_send_failed); 88 printstat(s, mesq_noop); 89 printstat(s, mesq_send_unexpected_error); 90 printstat(s, mesq_send_lb_overflow); 91 printstat(s, mesq_send_qlimit_reached); 92 printstat(s, mesq_send_amo_nacked); 93 printstat(s, mesq_send_put_nacked); 94 printstat(s, mesq_qf_locked); 95 printstat(s, mesq_qf_noop_not_full); 96 printstat(s, mesq_qf_switch_head_failed); 97 printstat(s, mesq_qf_unexpected_error); 98 printstat(s, mesq_noop_unexpected_error); 99 printstat(s, mesq_noop_lb_overflow); 100 printstat(s, mesq_noop_qlimit_reached); 101 printstat(s, mesq_noop_amo_nacked); 102 printstat(s, mesq_noop_put_nacked); 103 printstat(s, mesq_noop_page_overflow); 104 return 0; 105 } 106 107 static ssize_t statistics_write(struct file *file, const char __user *userbuf, 108 size_t count, loff_t *data) 109 { 110 memset(&gru_stats, 0, sizeof(gru_stats)); 111 return count; 112 } 113 114 static int mcs_statistics_show(struct seq_file *s, void *p) 115 { 116 int op; 117 unsigned long total, count, max; 118 static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt", 119 "cch_interrupt_sync", "cch_deallocate", "tfh_write_only", 120 "tfh_write_restart", "tgh_invalidate"}; 121 122 seq_printf(s, "%-20s%12s%12s%12s\n", "#id", "count", "aver-clks", "max-clks"); 123 for (op = 0; op < mcsop_last; op++) { 124 count = atomic_long_read(&mcs_op_statistics[op].count); 125 total = atomic_long_read(&mcs_op_statistics[op].total); 126 max = mcs_op_statistics[op].max; 127 seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count, 128 count ? total / count : 0, max); 129 } 130 return 0; 131 } 132 133 static ssize_t mcs_statistics_write(struct file *file, 134 const char __user *userbuf, size_t count, loff_t *data) 135 { 136 memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics)); 137 return count; 138 } 139 140 static int options_show(struct seq_file *s, void *p) 141 { 142 seq_printf(s, "#bitmask: 1=trace, 2=statistics\n"); 143 seq_printf(s, "0x%lx\n", gru_options); 144 return 0; 145 } 146 147 static ssize_t options_write(struct file *file, const char __user *userbuf, 148 size_t count, loff_t *data) 149 { 150 int ret; 151 152 ret = kstrtoul_from_user(userbuf, count, 0, &gru_options); 153 if (ret) 154 return ret; 155 156 return count; 157 } 158 159 static int cch_seq_show(struct seq_file *file, void *data) 160 { 161 long gid = *(long *)data; 162 int i; 163 struct gru_state *gru = GID_TO_GRU(gid); 164 struct gru_thread_state *ts; 165 const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" }; 166 167 if (gid == 0) 168 seq_printf(file, "#%5s%5s%6s%7s%9s%6s%8s%8s\n", "gid", "bid", 169 "ctx#", "asid", "pid", "cbrs", "dsbytes", "mode"); 170 if (gru) 171 for (i = 0; i < GRU_NUM_CCH; i++) { 172 ts = gru->gs_gts[i]; 173 if (!ts) 174 continue; 175 seq_printf(file, " %5d%5d%6d%7d%9d%6d%8d%8s\n", 176 gru->gs_gid, gru->gs_blade_id, i, 177 is_kernel_context(ts) ? 0 : ts->ts_gms->ms_asids[gid].mt_asid, 178 is_kernel_context(ts) ? 0 : ts->ts_tgid_owner, 179 ts->ts_cbr_au_count * GRU_CBR_AU_SIZE, 180 ts->ts_cbr_au_count * GRU_DSR_AU_BYTES, 181 mode[ts->ts_user_options & 182 GRU_OPT_MISS_MASK]); 183 } 184 185 return 0; 186 } 187 188 static int gru_seq_show(struct seq_file *file, void *data) 189 { 190 long gid = *(long *)data, ctxfree, cbrfree, dsrfree; 191 struct gru_state *gru = GID_TO_GRU(gid); 192 193 if (gid == 0) { 194 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "gid", "nid", 195 "ctx", "cbr", "dsr", "ctx", "cbr", "dsr"); 196 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "", "", "busy", 197 "busy", "busy", "free", "free", "free"); 198 } 199 if (gru) { 200 ctxfree = GRU_NUM_CCH - gru->gs_active_contexts; 201 cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE; 202 dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES; 203 seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n", 204 gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree, 205 GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree, 206 ctxfree, cbrfree, dsrfree); 207 } 208 209 return 0; 210 } 211 212 static void seq_stop(struct seq_file *file, void *data) 213 { 214 } 215 216 static void *seq_start(struct seq_file *file, loff_t *gid) 217 { 218 if (*gid < gru_max_gids) 219 return gid; 220 return NULL; 221 } 222 223 static void *seq_next(struct seq_file *file, void *data, loff_t *gid) 224 { 225 (*gid)++; 226 if (*gid < gru_max_gids) 227 return gid; 228 return NULL; 229 } 230 231 static const struct seq_operations cch_seq_ops = { 232 .start = seq_start, 233 .next = seq_next, 234 .stop = seq_stop, 235 .show = cch_seq_show 236 }; 237 238 static const struct seq_operations gru_seq_ops = { 239 .start = seq_start, 240 .next = seq_next, 241 .stop = seq_stop, 242 .show = gru_seq_show 243 }; 244 245 static int statistics_open(struct inode *inode, struct file *file) 246 { 247 return single_open(file, statistics_show, NULL); 248 } 249 250 static int mcs_statistics_open(struct inode *inode, struct file *file) 251 { 252 return single_open(file, mcs_statistics_show, NULL); 253 } 254 255 static int options_open(struct inode *inode, struct file *file) 256 { 257 return single_open(file, options_show, NULL); 258 } 259 260 /* *INDENT-OFF* */ 261 static const struct file_operations statistics_fops = { 262 .open = statistics_open, 263 .read = seq_read, 264 .write = statistics_write, 265 .llseek = seq_lseek, 266 .release = single_release, 267 }; 268 269 static const struct file_operations mcs_statistics_fops = { 270 .open = mcs_statistics_open, 271 .read = seq_read, 272 .write = mcs_statistics_write, 273 .llseek = seq_lseek, 274 .release = single_release, 275 }; 276 277 static const struct file_operations options_fops = { 278 .open = options_open, 279 .read = seq_read, 280 .write = options_write, 281 .llseek = seq_lseek, 282 .release = single_release, 283 }; 284 285 static struct proc_dir_entry *proc_gru __read_mostly; 286 287 int gru_proc_init(void) 288 { 289 proc_gru = proc_mkdir("sgi_uv/gru", NULL); 290 if (!proc_gru) 291 return -1; 292 if (!proc_create("statistics", 0644, proc_gru, &statistics_fops)) 293 goto err; 294 if (!proc_create("mcs_statistics", 0644, proc_gru, &mcs_statistics_fops)) 295 goto err; 296 if (!proc_create("debug_options", 0644, proc_gru, &options_fops)) 297 goto err; 298 if (!proc_create_seq("cch_status", 0444, proc_gru, &cch_seq_ops)) 299 goto err; 300 if (!proc_create_seq("gru_status", 0444, proc_gru, &gru_seq_ops)) 301 goto err; 302 return 0; 303 err: 304 remove_proc_subtree("sgi_uv/gru", NULL); 305 return -1; 306 } 307 308 void gru_proc_exit(void) 309 { 310 remove_proc_subtree("sgi_uv/gru", NULL); 311 } 312