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
printstat_val(struct seq_file * s,atomic_long_t * v,char * id)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
statistics_show(struct seq_file * s,void * p)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
statistics_write(struct file * file,const char __user * userbuf,size_t count,loff_t * data)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
mcs_statistics_show(struct seq_file * s,void * p)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_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
mcs_statistics_write(struct file * file,const char __user * userbuf,size_t count,loff_t * data)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
options_show(struct seq_file * s,void * p)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
options_write(struct file * file,const char __user * userbuf,size_t count,loff_t * data)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
cch_seq_show(struct seq_file * file,void * data)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_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
gru_seq_show(struct seq_file * file,void * data)187 static 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
seq_stop(struct seq_file * file,void * data)209 static void seq_stop(struct seq_file *file, void *data)
210 {
211 }
212
seq_start(struct seq_file * file,loff_t * gid)213 static 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
seq_next(struct seq_file * file,void * data,loff_t * gid)220 static 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
228 static 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
235 static 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
statistics_open(struct inode * inode,struct file * file)242 static int statistics_open(struct inode *inode, struct file *file)
243 {
244 return single_open(file, statistics_show, NULL);
245 }
246
mcs_statistics_open(struct inode * inode,struct file * file)247 static int mcs_statistics_open(struct inode *inode, struct file *file)
248 {
249 return single_open(file, mcs_statistics_show, NULL);
250 }
251
options_open(struct inode * inode,struct file * file)252 static int options_open(struct inode *inode, struct file *file)
253 {
254 return single_open(file, options_show, NULL);
255 }
256
257 /* *INDENT-OFF* */
258 static 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
266 static 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
274 static 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
282 static struct proc_dir_entry *proc_gru __read_mostly;
283
gru_proc_init(void)284 int 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;
300 err:
301 remove_proc_subtree("sgi_uv/gru", NULL);
302 return -1;
303 }
304
gru_proc_exit(void)305 void gru_proc_exit(void)
306 {
307 remove_proc_subtree("sgi_uv/gru", NULL);
308 }
309