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 22static 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 29static 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 107static 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 114static 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_puts(s, "#id count aver-clks max-clks\n"); 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 133static 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 140static 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 147static 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 159static 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_puts(file, "# gid bid ctx# asid pid cbrs dsbytes mode\n"); 169 if (gru) 170 for (i = 0; i < GRU_NUM_CCH; i++) { 171 ts = gru->gs_gts[i]; 172 if (!ts) 173 continue; 174 seq_printf(file, " %5d%5d%6d%7d%9d%6d%8d%8s\n", 175 gru->gs_gid, gru->gs_blade_id, i, 176 is_kernel_context(ts) ? 0 : ts->ts_gms->ms_asids[gid].mt_asid, 177 is_kernel_context(ts) ? 0 : ts->ts_tgid_owner, 178 ts->ts_cbr_au_count * GRU_CBR_AU_SIZE, 179 ts->ts_cbr_au_count * GRU_DSR_AU_BYTES, 180 mode[ts->ts_user_options & 181 GRU_OPT_MISS_MASK]); 182 } 183 184 return 0; 185} 186 187static int gru_seq_show(struct seq_file *file, void *data) 188{ 189 long gid = *(long *)data, ctxfree, cbrfree, dsrfree; 190 struct gru_state *gru = GID_TO_GRU(gid); 191 192 if (gid == 0) { 193 seq_puts(file, "# gid nid ctx cbr dsr ctx cbr dsr\n"); 194 seq_puts(file, "# busy busy busy free free free\n"); 195 } 196 if (gru) { 197 ctxfree = GRU_NUM_CCH - gru->gs_active_contexts; 198 cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE; 199 dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES; 200 seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n", 201 gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree, 202 GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree, 203 ctxfree, cbrfree, dsrfree); 204 } 205 206 return 0; 207} 208 209static void seq_stop(struct seq_file *file, void *data) 210{ 211} 212 213static void *seq_start(struct seq_file *file, loff_t *gid) 214{ 215 if (*gid < gru_max_gids) 216 return gid; 217 return NULL; 218} 219 220static void *seq_next(struct seq_file *file, void *data, loff_t *gid) 221{ 222 (*gid)++; 223 if (*gid < gru_max_gids) 224 return gid; 225 return NULL; 226} 227 228static const struct seq_operations cch_seq_ops = { 229 .start = seq_start, 230 .next = seq_next, 231 .stop = seq_stop, 232 .show = cch_seq_show 233}; 234 235static const struct seq_operations gru_seq_ops = { 236 .start = seq_start, 237 .next = seq_next, 238 .stop = seq_stop, 239 .show = gru_seq_show 240}; 241 242static int statistics_open(struct inode *inode, struct file *file) 243{ 244 return single_open(file, statistics_show, NULL); 245} 246 247static int mcs_statistics_open(struct inode *inode, struct file *file) 248{ 249 return single_open(file, mcs_statistics_show, NULL); 250} 251 252static int options_open(struct inode *inode, struct file *file) 253{ 254 return single_open(file, options_show, NULL); 255} 256 257/* *INDENT-OFF* */ 258static const struct proc_ops statistics_proc_ops = { 259 .proc_open = statistics_open, 260 .proc_read = seq_read, 261 .proc_write = statistics_write, 262 .proc_lseek = seq_lseek, 263 .proc_release = single_release, 264}; 265 266static const struct proc_ops mcs_statistics_proc_ops = { 267 .proc_open = mcs_statistics_open, 268 .proc_read = seq_read, 269 .proc_write = mcs_statistics_write, 270 .proc_lseek = seq_lseek, 271 .proc_release = single_release, 272}; 273 274static const struct proc_ops options_proc_ops = { 275 .proc_open = options_open, 276 .proc_read = seq_read, 277 .proc_write = options_write, 278 .proc_lseek = seq_lseek, 279 .proc_release = single_release, 280}; 281 282static struct proc_dir_entry *proc_gru __read_mostly; 283 284int gru_proc_init(void) 285{ 286 proc_gru = proc_mkdir("sgi_uv/gru", NULL); 287 if (!proc_gru) 288 return -1; 289 if (!proc_create("statistics", 0644, proc_gru, &statistics_proc_ops)) 290 goto err; 291 if (!proc_create("mcs_statistics", 0644, proc_gru, &mcs_statistics_proc_ops)) 292 goto err; 293 if (!proc_create("debug_options", 0644, proc_gru, &options_proc_ops)) 294 goto err; 295 if (!proc_create_seq("cch_status", 0444, proc_gru, &cch_seq_ops)) 296 goto err; 297 if (!proc_create_seq("gru_status", 0444, proc_gru, &gru_seq_ops)) 298 goto err; 299 return 0; 300err: 301 remove_proc_subtree("sgi_uv/gru", NULL); 302 return -1; 303} 304 305void gru_proc_exit(void) 306{ 307 remove_proc_subtree("sgi_uv/gru", NULL); 308} 309