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Jack Steiner1d09d732008-07-29 22:33:59 -07001/*
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
35static 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
43static 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);
Jack Steiner836ce672009-06-17 16:28:22 -070054 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);
Jack Steiner1d09d732008-07-29 22:33:59 -070060 printstat(s, steal_context_failed);
61 printstat(s, nopfn);
62 printstat(s, break_cow);
63 printstat(s, asid_new);
64 printstat(s, asid_next);
65 printstat(s, asid_wrap);
66 printstat(s, asid_reuse);
67 printstat(s, intr);
Jack Steiner43884602009-04-02 16:59:05 -070068 printstat(s, intr_mm_lock_failed);
Jack Steiner1d09d732008-07-29 22:33:59 -070069 printstat(s, call_os);
Jack Steiner43884602009-04-02 16:59:05 -070070 printstat(s, call_os_offnode_reference);
Jack Steiner1d09d732008-07-29 22:33:59 -070071 printstat(s, call_os_check_for_bug);
72 printstat(s, call_os_wait_queue);
73 printstat(s, user_flush_tlb);
74 printstat(s, user_unload_context);
75 printstat(s, user_exception);
Jack Steiner92b39382009-06-17 16:28:32 -070076 printstat(s, set_context_option);
Jack Steiner1d09d732008-07-29 22:33:59 -070077 printstat(s, migrate_check);
78 printstat(s, migrated_retarget);
79 printstat(s, migrated_unload);
80 printstat(s, migrated_unload_delay);
81 printstat(s, migrated_nopfn_retarget);
82 printstat(s, migrated_nopfn_unload);
83 printstat(s, tlb_dropin);
84 printstat(s, tlb_dropin_fail_no_asid);
85 printstat(s, tlb_dropin_fail_upm);
86 printstat(s, tlb_dropin_fail_invalid);
87 printstat(s, tlb_dropin_fail_range_active);
88 printstat(s, tlb_dropin_fail_idle);
89 printstat(s, tlb_dropin_fail_fmm);
Jack Steinercd1334f2009-06-17 16:28:19 -070090 printstat(s, tlb_dropin_fail_no_exception);
91 printstat(s, tlb_dropin_fail_no_exception_war);
Jack Steiner270952a2009-06-17 16:28:27 -070092 printstat(s, tfh_stale_on_fault);
Jack Steiner1d09d732008-07-29 22:33:59 -070093 printstat(s, mmu_invalidate_range);
94 printstat(s, mmu_invalidate_page);
95 printstat(s, mmu_clear_flush_young);
96 printstat(s, flush_tlb);
97 printstat(s, flush_tlb_gru);
98 printstat(s, flush_tlb_gru_tgh);
99 printstat(s, flush_tlb_gru_zero_asid);
100 printstat(s, copy_gpa);
101 printstat(s, mesq_receive);
102 printstat(s, mesq_receive_none);
103 printstat(s, mesq_send);
104 printstat(s, mesq_send_failed);
105 printstat(s, mesq_noop);
106 printstat(s, mesq_send_unexpected_error);
107 printstat(s, mesq_send_lb_overflow);
108 printstat(s, mesq_send_qlimit_reached);
109 printstat(s, mesq_send_amo_nacked);
110 printstat(s, mesq_send_put_nacked);
111 printstat(s, mesq_qf_not_full);
112 printstat(s, mesq_qf_locked);
113 printstat(s, mesq_qf_noop_not_full);
114 printstat(s, mesq_qf_switch_head_failed);
115 printstat(s, mesq_qf_unexpected_error);
116 printstat(s, mesq_noop_unexpected_error);
117 printstat(s, mesq_noop_lb_overflow);
118 printstat(s, mesq_noop_qlimit_reached);
119 printstat(s, mesq_noop_amo_nacked);
120 printstat(s, mesq_noop_put_nacked);
121 return 0;
122}
123
124static ssize_t statistics_write(struct file *file, const char __user *userbuf,
125 size_t count, loff_t *data)
126{
127 memset(&gru_stats, 0, sizeof(gru_stats));
128 return count;
129}
130
Jack Steinere56484d2009-04-02 16:59:06 -0700131static int mcs_statistics_show(struct seq_file *s, void *p)
132{
133 int op;
134 unsigned long total, count, max;
135 static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt",
136 "cch_interrupt_sync", "cch_deallocate", "tgh_invalidate"};
137
138 for (op = 0; op < mcsop_last; op++) {
139 count = atomic_long_read(&mcs_op_statistics[op].count);
140 total = atomic_long_read(&mcs_op_statistics[op].total);
141 max = mcs_op_statistics[op].max;
142 seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count,
143 count ? total / count : 0, max);
144 }
145 return 0;
146}
147
148static ssize_t mcs_statistics_write(struct file *file,
149 const char __user *userbuf, size_t count, loff_t *data)
150{
151 memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics));
152 return count;
153}
154
Jack Steiner1d09d732008-07-29 22:33:59 -0700155static int options_show(struct seq_file *s, void *p)
156{
Jack Steiner9ca8e40c12008-07-29 22:34:02 -0700157 seq_printf(s, "0x%lx\n", gru_options);
Jack Steiner1d09d732008-07-29 22:33:59 -0700158 return 0;
159}
160
161static ssize_t options_write(struct file *file, const char __user *userbuf,
162 size_t count, loff_t *data)
163{
164 unsigned long val;
165 char buf[80];
166
Jack Steinercd1334f2009-06-17 16:28:19 -0700167 if (strncpy_from_user(buf, userbuf, sizeof(buf) - 1) < 0)
Jack Steiner1d09d732008-07-29 22:33:59 -0700168 return -EFAULT;
Jack Steinere56484d2009-04-02 16:59:06 -0700169 buf[count - 1] = '\0';
Jack Steiner1d09d732008-07-29 22:33:59 -0700170 if (!strict_strtoul(buf, 10, &val))
Jack Steiner9ca8e40c12008-07-29 22:34:02 -0700171 gru_options = val;
Jack Steiner1d09d732008-07-29 22:33:59 -0700172
173 return count;
174}
175
176static 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%9s%6s%8s%8s\n", "gid", "bid",
186 "ctx#", "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%9d%6d%8d%8s\n",
193 gru->gs_gid, gru->gs_blade_id, i,
194 ts->ts_tgid_owner,
195 ts->ts_cbr_au_count * GRU_CBR_AU_SIZE,
196 ts->ts_cbr_au_count * GRU_DSR_AU_BYTES,
197 mode[ts->ts_user_options &
198 GRU_OPT_MISS_MASK]);
199 }
200
201 return 0;
202}
203
204static int gru_seq_show(struct seq_file *file, void *data)
205{
206 long gid = *(long *)data, ctxfree, cbrfree, dsrfree;
207 struct gru_state *gru = GID_TO_GRU(gid);
208
209 if (gid == 0) {
210 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "gid", "nid",
211 "ctx", "cbr", "dsr", "ctx", "cbr", "dsr");
212 seq_printf(file, "#%5s%5s%7s%6s%6s%8s%6s%6s\n", "", "", "busy",
213 "busy", "busy", "free", "free", "free");
214 }
215 if (gru) {
216 ctxfree = GRU_NUM_CCH - gru->gs_active_contexts;
217 cbrfree = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
218 dsrfree = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
219 seq_printf(file, " %5d%5d%7ld%6ld%6ld%8ld%6ld%6ld\n",
220 gru->gs_gid, gru->gs_blade_id, GRU_NUM_CCH - ctxfree,
221 GRU_NUM_CBE - cbrfree, GRU_NUM_DSR_BYTES - dsrfree,
222 ctxfree, cbrfree, dsrfree);
223 }
224
225 return 0;
226}
227
228static void seq_stop(struct seq_file *file, void *data)
229{
230}
231
232static void *seq_start(struct seq_file *file, loff_t *gid)
233{
Jack Steinere1c32192009-04-02 16:59:10 -0700234 if (*gid < gru_max_gids)
Jack Steiner1d09d732008-07-29 22:33:59 -0700235 return gid;
236 return NULL;
237}
238
239static void *seq_next(struct seq_file *file, void *data, loff_t *gid)
240{
241 (*gid)++;
Jack Steinere1c32192009-04-02 16:59:10 -0700242 if (*gid < gru_max_gids)
Jack Steiner1d09d732008-07-29 22:33:59 -0700243 return gid;
244 return NULL;
245}
246
247static const struct seq_operations cch_seq_ops = {
248 .start = seq_start,
249 .next = seq_next,
250 .stop = seq_stop,
251 .show = cch_seq_show
252};
253
254static const struct seq_operations gru_seq_ops = {
255 .start = seq_start,
256 .next = seq_next,
257 .stop = seq_stop,
258 .show = gru_seq_show
259};
260
261static int statistics_open(struct inode *inode, struct file *file)
262{
263 return single_open(file, statistics_show, NULL);
264}
265
Jack Steinere56484d2009-04-02 16:59:06 -0700266static int mcs_statistics_open(struct inode *inode, struct file *file)
267{
268 return single_open(file, mcs_statistics_show, NULL);
269}
270
Jack Steiner1d09d732008-07-29 22:33:59 -0700271static int options_open(struct inode *inode, struct file *file)
272{
273 return single_open(file, options_show, NULL);
274}
275
276static int cch_open(struct inode *inode, struct file *file)
277{
278 return seq_open(file, &cch_seq_ops);
279}
280
281static int gru_open(struct inode *inode, struct file *file)
282{
283 return seq_open(file, &gru_seq_ops);
284}
285
286/* *INDENT-OFF* */
287static const struct file_operations statistics_fops = {
288 .open = statistics_open,
289 .read = seq_read,
290 .write = statistics_write,
291 .llseek = seq_lseek,
292 .release = single_release,
293};
294
Jack Steinere56484d2009-04-02 16:59:06 -0700295static const struct file_operations mcs_statistics_fops = {
296 .open = mcs_statistics_open,
297 .read = seq_read,
298 .write = mcs_statistics_write,
299 .llseek = seq_lseek,
300 .release = single_release,
301};
302
Jack Steiner1d09d732008-07-29 22:33:59 -0700303static const struct file_operations options_fops = {
304 .open = options_open,
305 .read = seq_read,
306 .write = options_write,
307 .llseek = seq_lseek,
308 .release = single_release,
309};
310
311static const struct file_operations cch_fops = {
312 .open = cch_open,
313 .read = seq_read,
314 .llseek = seq_lseek,
315 .release = seq_release,
316};
317static const struct file_operations gru_fops = {
318 .open = gru_open,
319 .read = seq_read,
320 .llseek = seq_lseek,
321 .release = seq_release,
322};
323
324static struct proc_entry {
325 char *name;
326 int mode;
327 const struct file_operations *fops;
328 struct proc_dir_entry *entry;
329} proc_files[] = {
330 {"statistics", 0644, &statistics_fops},
Jack Steinere56484d2009-04-02 16:59:06 -0700331 {"mcs_statistics", 0644, &mcs_statistics_fops},
Jack Steiner1d09d732008-07-29 22:33:59 -0700332 {"debug_options", 0644, &options_fops},
333 {"cch_status", 0444, &cch_fops},
334 {"gru_status", 0444, &gru_fops},
335 {NULL}
336};
337/* *INDENT-ON* */
338
339static struct proc_dir_entry *proc_gru __read_mostly;
340
341static int create_proc_file(struct proc_entry *p)
342{
Alexey Dobriyanf8679af2009-09-23 15:57:33 -0700343 p->entry = proc_create(p->name, p->mode, proc_gru, p->fops);
Jack Steiner1d09d732008-07-29 22:33:59 -0700344 if (!p->entry)
345 return -1;
Jack Steiner1d09d732008-07-29 22:33:59 -0700346 return 0;
347}
348
349static void delete_proc_files(void)
350{
351 struct proc_entry *p;
352
353 if (proc_gru) {
354 for (p = proc_files; p->name; p++)
355 if (p->entry)
356 remove_proc_entry(p->name, proc_gru);
357 remove_proc_entry("gru", NULL);
358 }
359}
360
361int gru_proc_init(void)
362{
363 struct proc_entry *p;
364
Jack Steiner1d09d732008-07-29 22:33:59 -0700365 proc_gru = proc_mkdir("sgi_uv/gru", NULL);
366
367 for (p = proc_files; p->name; p++)
368 if (create_proc_file(p))
369 goto err;
370 return 0;
371
372err:
373 delete_proc_files();
374 return -1;
375}
376
377void gru_proc_exit(void)
378{
379 delete_proc_files();
380}