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
printstat_val(struct seq_file * s,atomic_long_t * v,char * id)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
statistics_show(struct seq_file * s,void * p)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
statistics_write(struct file * file,const char __user * userbuf,size_t count,loff_t * data)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
mcs_statistics_show(struct seq_file * s,void * p)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
mcs_statistics_write(struct file * file,const char __user * userbuf,size_t count,loff_t * data)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
options_show(struct seq_file * s,void * p)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
options_write(struct file * file,const char __user * userbuf,size_t count,loff_t * data)160 static ssize_t options_write(struct file *file, const char __user *userbuf,
161 size_t count, loff_t *data)
162 {
163 char buf[20];
164
165 if (count >= sizeof(buf))
166 return -EINVAL;
167 if (copy_from_user(buf, userbuf, count))
168 return -EFAULT;
169 buf[count] = '\0';
170 if (strict_strtoul(buf, 0, &gru_options))
171 return -EINVAL;
172
173 return count;
174 }
175
cch_seq_show(struct seq_file * file,void * data)176 static int cch_seq_show(struct seq_file *file, void *data)
177 {
178 long gid = *(long *)data;
179 int i;
180 struct gru_state *gru = GID_TO_GRU(gid);
181 struct gru_thread_state *ts;
182 const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" };
183
184 if (gid == 0)
185 seq_printf(file, "#%5s%5s%6s%7s%9s%6s%8s%8s\n", "gid", "bid",
186 "ctx#", "asid", "pid", "cbrs", "dsbytes", "mode");
187 if (gru)
188 for (i = 0; i < GRU_NUM_CCH; i++) {
189 ts = gru->gs_gts[i];
190 if (!ts)
191 continue;
192 seq_printf(file, " %5d%5d%6d%7d%9d%6d%8d%8s\n",
193 gru->gs_gid, gru->gs_blade_id, i,
194 is_kernel_context(ts) ? 0 : ts->ts_gms->ms_asids[gid].mt_asid,
195 is_kernel_context(ts) ? 0 : 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
gru_seq_show(struct seq_file * file,void * data)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
seq_stop(struct seq_file * file,void * data)229 static void seq_stop(struct seq_file *file, void *data)
230 {
231 }
232
seq_start(struct seq_file * file,loff_t * gid)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
seq_next(struct seq_file * file,void * data,loff_t * gid)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
statistics_open(struct inode * inode,struct file * file)262 static int statistics_open(struct inode *inode, struct file *file)
263 {
264 return single_open(file, statistics_show, NULL);
265 }
266
mcs_statistics_open(struct inode * inode,struct file * file)267 static int mcs_statistics_open(struct inode *inode, struct file *file)
268 {
269 return single_open(file, mcs_statistics_show, NULL);
270 }
271
options_open(struct inode * inode,struct file * file)272 static int options_open(struct inode *inode, struct file *file)
273 {
274 return single_open(file, options_show, NULL);
275 }
276
cch_open(struct inode * inode,struct file * file)277 static int cch_open(struct inode *inode, struct file *file)
278 {
279 return seq_open(file, &cch_seq_ops);
280 }
281
gru_open(struct inode * inode,struct file * file)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
create_proc_file(struct proc_entry * p)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
delete_proc_files(void)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", proc_gru->parent);
359 }
360 }
361
gru_proc_init(void)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
gru_proc_exit(void)378 void gru_proc_exit(void)
379 {
380 delete_proc_files();
381 }
382