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 if (val)
40 seq_printf(s, "%16lu %s\n", val, id);
41 }
42
statistics_show(struct seq_file * s,void * p)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
statistics_write(struct file * file,const char __user * userbuf,size_t count,loff_t * data)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
options_show(struct seq_file * s,void * p)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
options_write(struct file * file,const char __user * userbuf,size_t count,loff_t * data)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
cch_seq_show(struct seq_file * file,void * data)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
gru_seq_show(struct seq_file * file,void * data)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
seq_stop(struct seq_file * file,void * data)196 static void seq_stop(struct seq_file *file, void *data)
197 {
198 }
199
seq_start(struct seq_file * file,loff_t * gid)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
seq_next(struct seq_file * file,void * data,loff_t * gid)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
statistics_open(struct inode * inode,struct file * file)229 static int statistics_open(struct inode *inode, struct file *file)
230 {
231 return single_open(file, statistics_show, NULL);
232 }
233
options_open(struct inode * inode,struct file * file)234 static int options_open(struct inode *inode, struct file *file)
235 {
236 return single_open(file, options_show, NULL);
237 }
238
cch_open(struct inode * inode,struct file * file)239 static int cch_open(struct inode *inode, struct file *file)
240 {
241 return seq_open(file, &cch_seq_ops);
242 }
243
gru_open(struct inode * inode,struct file * file)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
create_proc_file(struct proc_entry * p)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
delete_proc_files(void)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
gru_proc_init(void)316 int gru_proc_init(void)
317 {
318 struct proc_entry *p;
319
320 proc_gru = proc_mkdir("sgi_uv/gru", NULL);
321
322 for (p = proc_files; p->name; p++)
323 if (create_proc_file(p))
324 goto err;
325 return 0;
326
327 err:
328 delete_proc_files();
329 return -1;
330 }
331
gru_proc_exit(void)332 void gru_proc_exit(void)
333 {
334 delete_proc_files();
335 }
336