1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
|
/*
* Copyright (c) 2006 QLogic, Inc. All rights reserved.
* Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/pci.h>
#include "ipath_kernel.h"
struct infinipath_stats ipath_stats;
/**
* ipath_snap_cntr - snapshot a chip counter
* @dd: the infinipath device
* @creg: the counter to snapshot
*
* called from add_timer and user counter read calls, to deal with
* counters that wrap in "human time". The words sent and received, and
* the packets sent and received are all that we worry about. For now,
* at least, we don't worry about error counters, because if they wrap
* that quickly, we probably don't care. We may eventually just make this
* handle all the counters. word counters can wrap in about 20 seconds
* of full bandwidth traffic, packet counters in a few hours.
*/
u64 ipath_snap_cntr(struct ipath_devdata *dd, ipath_creg creg)
{
u32 val, reg64 = 0;
u64 val64;
unsigned long t0, t1;
u64 ret;
t0 = jiffies;
/* If fast increment counters are only 32 bits, snapshot them,
* and maintain them as 64bit values in the driver */
if (!(dd->ipath_flags & IPATH_32BITCOUNTERS) &&
(creg == dd->ipath_cregs->cr_wordsendcnt ||
creg == dd->ipath_cregs->cr_wordrcvcnt ||
creg == dd->ipath_cregs->cr_pktsendcnt ||
creg == dd->ipath_cregs->cr_pktrcvcnt)) {
val64 = ipath_read_creg(dd, creg);
val = val64 == ~0ULL ? ~0U : 0;
reg64 = 1;
} else /* val64 just to keep gcc quiet... */
val64 = val = ipath_read_creg32(dd, creg);
/*
* See if a second has passed. This is just a way to detect things
* that are quite broken. Normally this should take just a few
* cycles (the check is for long enough that we don't care if we get
* pre-empted.) An Opteron HT O read timeout is 4 seconds with
* normal NB values
*/
t1 = jiffies;
if (time_before(t0 + HZ, t1) && val == -1) {
ipath_dev_err(dd, "Error! Read counter 0x%x timed out\n",
creg);
ret = 0ULL;
goto bail;
}
if (reg64) {
ret = val64;
goto bail;
}
if (creg == dd->ipath_cregs->cr_wordsendcnt) {
if (val != dd->ipath_lastsword) {
dd->ipath_sword += val - dd->ipath_lastsword;
dd->ipath_lastsword = val;
}
val64 = dd->ipath_sword;
} else if (creg == dd->ipath_cregs->cr_wordrcvcnt) {
if (val != dd->ipath_lastrword) {
dd->ipath_rword += val - dd->ipath_lastrword;
dd->ipath_lastrword = val;
}
val64 = dd->ipath_rword;
} else if (creg == dd->ipath_cregs->cr_pktsendcnt) {
if (val != dd->ipath_lastspkts) {
dd->ipath_spkts += val - dd->ipath_lastspkts;
dd->ipath_lastspkts = val;
}
val64 = dd->ipath_spkts;
} else if (creg == dd->ipath_cregs->cr_pktrcvcnt) {
if (val != dd->ipath_lastrpkts) {
dd->ipath_rpkts += val - dd->ipath_lastrpkts;
dd->ipath_lastrpkts = val;
}
val64 = dd->ipath_rpkts;
} else
val64 = (u64) val;
ret = val64;
bail:
return ret;
}
/**
* ipath_qcheck - print delta of egrfull/hdrqfull errors for kernel ports
* @dd: the infinipath device
*
* print the delta of egrfull/hdrqfull errors for kernel ports no more than
* every 5 seconds. User processes are printed at close, but kernel doesn't
* close, so... Separate routine so may call from other places someday, and
* so function name when printed by _IPATH_INFO is meaningfull
*/
static void ipath_qcheck(struct ipath_devdata *dd)
{
static u64 last_tot_hdrqfull;
size_t blen = 0;
char buf[128];
*buf = 0;
if (dd->ipath_pd[0]->port_hdrqfull != dd->ipath_p0_hdrqfull) {
blen = snprintf(buf, sizeof buf, "port 0 hdrqfull %u",
dd->ipath_pd[0]->port_hdrqfull -
dd->ipath_p0_hdrqfull);
dd->ipath_p0_hdrqfull = dd->ipath_pd[0]->port_hdrqfull;
}
if (ipath_stats.sps_etidfull != dd->ipath_last_tidfull) {
blen += snprintf(buf + blen, sizeof buf - blen,
"%srcvegrfull %llu",
blen ? ", " : "",
(unsigned long long)
(ipath_stats.sps_etidfull -
dd->ipath_last_tidfull));
dd->ipath_last_tidfull = ipath_stats.sps_etidfull;
}
/*
* this is actually the number of hdrq full interrupts, not actual
* events, but at the moment that's mostly what I'm interested in.
* Actual count, etc. is in the counters, if needed. For production
* users this won't ordinarily be printed.
*/
if ((ipath_debug & (__IPATH_PKTDBG | __IPATH_DBG)) &&
ipath_stats.sps_hdrqfull != last_tot_hdrqfull) {
blen += snprintf(buf + blen, sizeof buf - blen,
"%shdrqfull %llu (all ports)",
blen ? ", " : "",
(unsigned long long)
(ipath_stats.sps_hdrqfull -
last_tot_hdrqfull));
last_tot_hdrqfull = ipath_stats.sps_hdrqfull;
}
if (blen)
ipath_dbg("%s\n", buf);
if (dd->ipath_port0head != (u32)
le64_to_cpu(*dd->ipath_hdrqtailptr)) {
if (dd->ipath_lastport0rcv_cnt ==
ipath_stats.sps_port0pkts) {
ipath_cdbg(PKT, "missing rcv interrupts? "
"port0 hd=%llx tl=%x; port0pkts %llx\n",
(unsigned long long)
le64_to_cpu(*dd->ipath_hdrqtailptr),
dd->ipath_port0head,
(unsigned long long)
ipath_stats.sps_port0pkts);
ipath_kreceive(dd);
}
dd->ipath_lastport0rcv_cnt = ipath_stats.sps_port0pkts;
}
}
/**
* ipath_get_faststats - get word counters from chip before they overflow
* @opaque - contains a pointer to the infinipath device ipath_devdata
*
* called from add_timer
*/
void ipath_get_faststats(unsigned long opaque)
{
struct ipath_devdata *dd = (struct ipath_devdata *) opaque;
u32 val;
static unsigned cnt;
/*
* don't access the chip while running diags, or memory diags can
* fail
*/
if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT) ||
ipath_diag_inuse)
/* but re-arm the timer, for diags case; won't hurt other */
goto done;
if (dd->ipath_flags & IPATH_32BITCOUNTERS) {
ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordsendcnt);
ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordrcvcnt);
ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktsendcnt);
ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktrcvcnt);
}
ipath_qcheck(dd);
/*
* deal with repeat error suppression. Doesn't really matter if
* last error was almost a full interval ago, or just a few usecs
* ago; still won't get more than 2 per interval. We may want
* longer intervals for this eventually, could do with mod, counter
* or separate timer. Also see code in ipath_handle_errors() and
* ipath_handle_hwerrors().
*/
if (dd->ipath_lasterror)
dd->ipath_lasterror = 0;
if (dd->ipath_lasthwerror)
dd->ipath_lasthwerror = 0;
if ((dd->ipath_maskederrs & ~dd->ipath_ignorederrs)
&& time_after(jiffies, dd->ipath_unmasktime)) {
char ebuf[256];
ipath_decode_err(ebuf, sizeof ebuf,
(dd->ipath_maskederrs & ~dd->
ipath_ignorederrs));
if ((dd->ipath_maskederrs & ~dd->ipath_ignorederrs) &
~(INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL))
ipath_dev_err(dd, "Re-enabling masked errors "
"(%s)\n", ebuf);
else {
/*
* rcvegrfull and rcvhdrqfull are "normal", for some
* types of processes (mostly benchmarks) that send
* huge numbers of messages, while not processing
* them. So only complain about these at debug
* level.
*/
ipath_dbg("Disabling frequent queue full errors "
"(%s)\n", ebuf);
}
dd->ipath_maskederrs = dd->ipath_ignorederrs;
ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask,
~dd->ipath_maskederrs);
}
/* limit qfull messages to ~one per minute per port */
if ((++cnt & 0x10)) {
for (val = dd->ipath_cfgports - 1; ((int)val) >= 0;
val--) {
if (dd->ipath_lastegrheads[val] != -1)
dd->ipath_lastegrheads[val] = -1;
if (dd->ipath_lastrcvhdrqtails[val] != -1)
dd->ipath_lastrcvhdrqtails[val] = -1;
}
}
if (dd->ipath_nosma_bufs) {
dd->ipath_nosma_secs += 5;
if (dd->ipath_nosma_secs >= 30) {
ipath_cdbg(SMA, "No SMA bufs avail %u seconds; "
"cancelling pending sends\n",
dd->ipath_nosma_secs);
/*
* issue an abort as well, in case we have a packet
* stuck in launch fifo. This could corrupt an
* outgoing user packet in the worst case,
* but this is a pretty catastrophic, anyway.
*/
ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
INFINIPATH_S_ABORT);
ipath_disarm_piobufs(dd, dd->ipath_lastport_piobuf,
dd->ipath_piobcnt2k +
dd->ipath_piobcnt4k -
dd->ipath_lastport_piobuf);
/* start again, if necessary */
dd->ipath_nosma_secs = 0;
} else
ipath_cdbg(SMA, "No SMA bufs avail %u tries, "
"after %u seconds\n",
dd->ipath_nosma_bufs,
dd->ipath_nosma_secs);
}
done:
mod_timer(&dd->ipath_stats_timer, jiffies + HZ * 5);
}
|
