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108ecf0d | 1 | /* |
87427da5 | 2 | * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved. |
108ecf0d BS |
3 | * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. |
4 | * | |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | */ | |
33 | ||
108ecf0d BS |
34 | #include "ipath_kernel.h" |
35 | ||
36 | struct infinipath_stats ipath_stats; | |
37 | ||
38 | /** | |
39 | * ipath_snap_cntr - snapshot a chip counter | |
40 | * @dd: the infinipath device | |
41 | * @creg: the counter to snapshot | |
42 | * | |
43 | * called from add_timer and user counter read calls, to deal with | |
44 | * counters that wrap in "human time". The words sent and received, and | |
45 | * the packets sent and received are all that we worry about. For now, | |
46 | * at least, we don't worry about error counters, because if they wrap | |
47 | * that quickly, we probably don't care. We may eventually just make this | |
48 | * handle all the counters. word counters can wrap in about 20 seconds | |
49 | * of full bandwidth traffic, packet counters in a few hours. | |
50 | */ | |
51 | ||
52 | u64 ipath_snap_cntr(struct ipath_devdata *dd, ipath_creg creg) | |
53 | { | |
54 | u32 val, reg64 = 0; | |
55 | u64 val64; | |
56 | unsigned long t0, t1; | |
57 | u64 ret; | |
58 | ||
59 | t0 = jiffies; | |
60 | /* If fast increment counters are only 32 bits, snapshot them, | |
61 | * and maintain them as 64bit values in the driver */ | |
62 | if (!(dd->ipath_flags & IPATH_32BITCOUNTERS) && | |
63 | (creg == dd->ipath_cregs->cr_wordsendcnt || | |
64 | creg == dd->ipath_cregs->cr_wordrcvcnt || | |
65 | creg == dd->ipath_cregs->cr_pktsendcnt || | |
66 | creg == dd->ipath_cregs->cr_pktrcvcnt)) { | |
67 | val64 = ipath_read_creg(dd, creg); | |
68 | val = val64 == ~0ULL ? ~0U : 0; | |
69 | reg64 = 1; | |
70 | } else /* val64 just to keep gcc quiet... */ | |
71 | val64 = val = ipath_read_creg32(dd, creg); | |
72 | /* | |
73 | * See if a second has passed. This is just a way to detect things | |
74 | * that are quite broken. Normally this should take just a few | |
75 | * cycles (the check is for long enough that we don't care if we get | |
76 | * pre-empted.) An Opteron HT O read timeout is 4 seconds with | |
77 | * normal NB values | |
78 | */ | |
79 | t1 = jiffies; | |
80 | if (time_before(t0 + HZ, t1) && val == -1) { | |
81 | ipath_dev_err(dd, "Error! Read counter 0x%x timed out\n", | |
82 | creg); | |
83 | ret = 0ULL; | |
84 | goto bail; | |
85 | } | |
86 | if (reg64) { | |
87 | ret = val64; | |
88 | goto bail; | |
89 | } | |
90 | ||
91 | if (creg == dd->ipath_cregs->cr_wordsendcnt) { | |
92 | if (val != dd->ipath_lastsword) { | |
93 | dd->ipath_sword += val - dd->ipath_lastsword; | |
94 | dd->ipath_lastsword = val; | |
95 | } | |
96 | val64 = dd->ipath_sword; | |
97 | } else if (creg == dd->ipath_cregs->cr_wordrcvcnt) { | |
98 | if (val != dd->ipath_lastrword) { | |
99 | dd->ipath_rword += val - dd->ipath_lastrword; | |
100 | dd->ipath_lastrword = val; | |
101 | } | |
102 | val64 = dd->ipath_rword; | |
103 | } else if (creg == dd->ipath_cregs->cr_pktsendcnt) { | |
104 | if (val != dd->ipath_lastspkts) { | |
105 | dd->ipath_spkts += val - dd->ipath_lastspkts; | |
106 | dd->ipath_lastspkts = val; | |
107 | } | |
108 | val64 = dd->ipath_spkts; | |
109 | } else if (creg == dd->ipath_cregs->cr_pktrcvcnt) { | |
110 | if (val != dd->ipath_lastrpkts) { | |
111 | dd->ipath_rpkts += val - dd->ipath_lastrpkts; | |
112 | dd->ipath_lastrpkts = val; | |
113 | } | |
114 | val64 = dd->ipath_rpkts; | |
115 | } else | |
116 | val64 = (u64) val; | |
117 | ||
118 | ret = val64; | |
119 | ||
120 | bail: | |
121 | return ret; | |
122 | } | |
123 | ||
124 | /** | |
125 | * ipath_qcheck - print delta of egrfull/hdrqfull errors for kernel ports | |
126 | * @dd: the infinipath device | |
127 | * | |
128 | * print the delta of egrfull/hdrqfull errors for kernel ports no more than | |
129 | * every 5 seconds. User processes are printed at close, but kernel doesn't | |
130 | * close, so... Separate routine so may call from other places someday, and | |
131 | * so function name when printed by _IPATH_INFO is meaningfull | |
132 | */ | |
133 | static void ipath_qcheck(struct ipath_devdata *dd) | |
134 | { | |
135 | static u64 last_tot_hdrqfull; | |
c59a80ac | 136 | struct ipath_portdata *pd = dd->ipath_pd[0]; |
108ecf0d BS |
137 | size_t blen = 0; |
138 | char buf[128]; | |
9355fb6a | 139 | u32 hdrqtail; |
108ecf0d BS |
140 | |
141 | *buf = 0; | |
c59a80ac | 142 | if (pd->port_hdrqfull != dd->ipath_p0_hdrqfull) { |
108ecf0d | 143 | blen = snprintf(buf, sizeof buf, "port 0 hdrqfull %u", |
c59a80ac | 144 | pd->port_hdrqfull - |
108ecf0d | 145 | dd->ipath_p0_hdrqfull); |
c59a80ac | 146 | dd->ipath_p0_hdrqfull = pd->port_hdrqfull; |
108ecf0d BS |
147 | } |
148 | if (ipath_stats.sps_etidfull != dd->ipath_last_tidfull) { | |
149 | blen += snprintf(buf + blen, sizeof buf - blen, | |
150 | "%srcvegrfull %llu", | |
151 | blen ? ", " : "", | |
152 | (unsigned long long) | |
153 | (ipath_stats.sps_etidfull - | |
154 | dd->ipath_last_tidfull)); | |
155 | dd->ipath_last_tidfull = ipath_stats.sps_etidfull; | |
156 | } | |
157 | ||
158 | /* | |
159 | * this is actually the number of hdrq full interrupts, not actual | |
160 | * events, but at the moment that's mostly what I'm interested in. | |
161 | * Actual count, etc. is in the counters, if needed. For production | |
162 | * users this won't ordinarily be printed. | |
163 | */ | |
164 | ||
165 | if ((ipath_debug & (__IPATH_PKTDBG | __IPATH_DBG)) && | |
166 | ipath_stats.sps_hdrqfull != last_tot_hdrqfull) { | |
167 | blen += snprintf(buf + blen, sizeof buf - blen, | |
168 | "%shdrqfull %llu (all ports)", | |
169 | blen ? ", " : "", | |
170 | (unsigned long long) | |
171 | (ipath_stats.sps_hdrqfull - | |
172 | last_tot_hdrqfull)); | |
173 | last_tot_hdrqfull = ipath_stats.sps_hdrqfull; | |
174 | } | |
175 | if (blen) | |
176 | ipath_dbg("%s\n", buf); | |
177 | ||
9355fb6a RC |
178 | hdrqtail = ipath_get_hdrqtail(pd); |
179 | if (pd->port_head != hdrqtail) { | |
108ecf0d BS |
180 | if (dd->ipath_lastport0rcv_cnt == |
181 | ipath_stats.sps_port0pkts) { | |
182 | ipath_cdbg(PKT, "missing rcv interrupts? " | |
9355fb6a RC |
183 | "port0 hd=%x tl=%x; port0pkts %llx; write" |
184 | " hd (w/intr)\n", | |
185 | pd->port_head, hdrqtail, | |
108ecf0d BS |
186 | (unsigned long long) |
187 | ipath_stats.sps_port0pkts); | |
9355fb6a RC |
188 | ipath_write_ureg(dd, ur_rcvhdrhead, hdrqtail | |
189 | dd->ipath_rhdrhead_intr_off, pd->port_port); | |
108ecf0d BS |
190 | } |
191 | dd->ipath_lastport0rcv_cnt = ipath_stats.sps_port0pkts; | |
192 | } | |
193 | } | |
194 | ||
78d1e02f DO |
195 | static void ipath_chk_errormask(struct ipath_devdata *dd) |
196 | { | |
197 | static u32 fixed; | |
198 | u32 ctrl; | |
199 | unsigned long errormask; | |
200 | unsigned long hwerrs; | |
201 | ||
202 | if (!dd->ipath_errormask || !(dd->ipath_flags & IPATH_INITTED)) | |
203 | return; | |
204 | ||
205 | errormask = ipath_read_kreg64(dd, dd->ipath_kregs->kr_errormask); | |
206 | ||
207 | if (errormask == dd->ipath_errormask) | |
208 | return; | |
209 | fixed++; | |
210 | ||
211 | hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus); | |
212 | ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control); | |
213 | ||
214 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, | |
215 | dd->ipath_errormask); | |
216 | ||
217 | if ((hwerrs & dd->ipath_hwerrmask) || | |
218 | (ctrl & INFINIPATH_C_FREEZEMODE)) { | |
219 | /* force re-interrupt of pending events, just in case */ | |
220 | ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, 0ULL); | |
221 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, 0ULL); | |
222 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, 0ULL); | |
223 | dev_info(&dd->pcidev->dev, | |
224 | "errormask fixed(%u) %lx -> %lx, ctrl %x hwerr %lx\n", | |
225 | fixed, errormask, (unsigned long)dd->ipath_errormask, | |
226 | ctrl, hwerrs); | |
227 | } else | |
228 | ipath_dbg("errormask fixed(%u) %lx -> %lx, no freeze\n", | |
229 | fixed, errormask, | |
230 | (unsigned long)dd->ipath_errormask); | |
231 | } | |
232 | ||
233 | ||
108ecf0d BS |
234 | /** |
235 | * ipath_get_faststats - get word counters from chip before they overflow | |
236 | * @opaque - contains a pointer to the infinipath device ipath_devdata | |
237 | * | |
238 | * called from add_timer | |
239 | */ | |
240 | void ipath_get_faststats(unsigned long opaque) | |
241 | { | |
242 | struct ipath_devdata *dd = (struct ipath_devdata *) opaque; | |
755807a2 | 243 | int i; |
108ecf0d | 244 | static unsigned cnt; |
aecd3b5a | 245 | unsigned long flags; |
192594d5 | 246 | u64 traffic_wds; |
108ecf0d BS |
247 | |
248 | /* | |
249 | * don't access the chip while running diags, or memory diags can | |
250 | * fail | |
251 | */ | |
27b044a8 | 252 | if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_INITTED) || |
108ecf0d BS |
253 | ipath_diag_inuse) |
254 | /* but re-arm the timer, for diags case; won't hurt other */ | |
255 | goto done; | |
256 | ||
aecd3b5a MA |
257 | /* |
258 | * We now try to maintain a "active timer", based on traffic | |
259 | * exceeding a threshold, so we need to check the word-counts | |
260 | * even if they are 64-bit. | |
261 | */ | |
192594d5 MA |
262 | traffic_wds = ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordsendcnt) + |
263 | ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordrcvcnt); | |
aecd3b5a | 264 | spin_lock_irqsave(&dd->ipath_eep_st_lock, flags); |
192594d5 MA |
265 | traffic_wds -= dd->ipath_traffic_wds; |
266 | dd->ipath_traffic_wds += traffic_wds; | |
267 | if (traffic_wds >= IPATH_TRAFFIC_ACTIVE_THRESHOLD) | |
aecd3b5a | 268 | atomic_add(5, &dd->ipath_active_time); /* S/B #define */ |
aecd3b5a MA |
269 | spin_unlock_irqrestore(&dd->ipath_eep_st_lock, flags); |
270 | ||
108ecf0d | 271 | if (dd->ipath_flags & IPATH_32BITCOUNTERS) { |
108ecf0d BS |
272 | ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktsendcnt); |
273 | ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktrcvcnt); | |
274 | } | |
275 | ||
276 | ipath_qcheck(dd); | |
277 | ||
278 | /* | |
279 | * deal with repeat error suppression. Doesn't really matter if | |
280 | * last error was almost a full interval ago, or just a few usecs | |
281 | * ago; still won't get more than 2 per interval. We may want | |
282 | * longer intervals for this eventually, could do with mod, counter | |
283 | * or separate timer. Also see code in ipath_handle_errors() and | |
284 | * ipath_handle_hwerrors(). | |
285 | */ | |
286 | ||
287 | if (dd->ipath_lasterror) | |
288 | dd->ipath_lasterror = 0; | |
289 | if (dd->ipath_lasthwerror) | |
290 | dd->ipath_lasthwerror = 0; | |
78d1e02f | 291 | if (dd->ipath_maskederrs |
108ecf0d BS |
292 | && time_after(jiffies, dd->ipath_unmasktime)) { |
293 | char ebuf[256]; | |
8ec1077b BS |
294 | int iserr; |
295 | iserr = ipath_decode_err(ebuf, sizeof ebuf, | |
78d1e02f DO |
296 | dd->ipath_maskederrs); |
297 | if (dd->ipath_maskederrs & | |
2ba3f56e RC |
298 | ~(INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL | |
299 | INFINIPATH_E_PKTERRS)) | |
108ecf0d BS |
300 | ipath_dev_err(dd, "Re-enabling masked errors " |
301 | "(%s)\n", ebuf); | |
302 | else { | |
303 | /* | |
304 | * rcvegrfull and rcvhdrqfull are "normal", for some | |
305 | * types of processes (mostly benchmarks) that send | |
306 | * huge numbers of messages, while not processing | |
307 | * them. So only complain about these at debug | |
308 | * level. | |
309 | */ | |
8ec1077b | 310 | if (iserr) |
2ba3f56e RC |
311 | ipath_dbg( |
312 | "Re-enabling queue full errors (%s)\n", | |
313 | ebuf); | |
8ec1077b BS |
314 | else |
315 | ipath_cdbg(ERRPKT, "Re-enabling packet" | |
2ba3f56e | 316 | " problem interrupt (%s)\n", ebuf); |
108ecf0d | 317 | } |
78d1e02f DO |
318 | |
319 | /* re-enable masked errors */ | |
320 | dd->ipath_errormask |= dd->ipath_maskederrs; | |
108ecf0d | 321 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, |
2ba3f56e | 322 | dd->ipath_errormask); |
78d1e02f | 323 | dd->ipath_maskederrs = 0; |
108ecf0d BS |
324 | } |
325 | ||
326 | /* limit qfull messages to ~one per minute per port */ | |
327 | if ((++cnt & 0x10)) { | |
755807a2 DO |
328 | for (i = (int) dd->ipath_cfgports; --i >= 0; ) { |
329 | struct ipath_portdata *pd = dd->ipath_pd[i]; | |
330 | ||
331 | if (pd && pd->port_lastrcvhdrqtail != -1) | |
332 | pd->port_lastrcvhdrqtail = -1; | |
108ecf0d BS |
333 | } |
334 | } | |
335 | ||
78d1e02f | 336 | ipath_chk_errormask(dd); |
108ecf0d BS |
337 | done: |
338 | mod_timer(&dd->ipath_stats_timer, jiffies + HZ * 5); | |
339 | } |