[deliverable/linux.git] / drivers / infiniband / hw / ipath / ipath_stats.c

/*
 * 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);
		}
		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;
		}
	}

done:
	mod_timer(&dd->ipath_stats_timer, jiffies + HZ * 5);
}
Commit	Line	Data
108ecf0d	1	/*
759d5768	2	* Copyright (c) 2006 QLogic, Inc. 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
	34	#include <linux/pci.h>
	35
	36	#include "ipath_kernel.h"
	37
	38	struct infinipath_stats ipath_stats;
	39
	40	/**
	41	* ipath_snap_cntr - snapshot a chip counter
	42	* @dd: the infinipath device
	43	* @creg: the counter to snapshot
	44	*
	45	* called from add_timer and user counter read calls, to deal with
	46	* counters that wrap in "human time". The words sent and received, and
	47	* the packets sent and received are all that we worry about. For now,
	48	* at least, we don't worry about error counters, because if they wrap
	49	* that quickly, we probably don't care. We may eventually just make this
	50	* handle all the counters. word counters can wrap in about 20 seconds
	51	* of full bandwidth traffic, packet counters in a few hours.
	52	*/
	53
	54	u64 ipath_snap_cntr(struct ipath_devdata *dd, ipath_creg creg)
	55	{
	56	u32 val, reg64 = 0;
	57	u64 val64;
	58	unsigned long t0, t1;
	59	u64 ret;
	60
	61	t0 = jiffies;
	62	/* If fast increment counters are only 32 bits, snapshot them,
	63	* and maintain them as 64bit values in the driver */
	64	if (!(dd->ipath_flags & IPATH_32BITCOUNTERS) &&
	65	(creg == dd->ipath_cregs->cr_wordsendcnt \|\|
	66	creg == dd->ipath_cregs->cr_wordrcvcnt \|\|
67	creg == dd->ipath_cregs->cr_pktsendcnt \|\|
68	creg == dd->ipath_cregs->cr_pktrcvcnt)) {
69	val64 = ipath_read_creg(dd, creg);
70	val = val64 == ~0ULL ? ~0U : 0;
71	reg64 = 1;
72	} else /* val64 just to keep gcc quiet... */
73	val64 = val = ipath_read_creg32(dd, creg);
74	/*
75	* See if a second has passed. This is just a way to detect things
76	* that are quite broken. Normally this should take just a few
77	* cycles (the check is for long enough that we don't care if we get
78	* pre-empted.) An Opteron HT O read timeout is 4 seconds with
79	* normal NB values
80	*/
81	t1 = jiffies;
82	if (time_before(t0 + HZ, t1) && val == -1) {
83	ipath_dev_err(dd, "Error! Read counter 0x%x timed out\n",
84	creg);
85	ret = 0ULL;
86	goto bail;
87	}
88	if (reg64) {
89	ret = val64;
90	goto bail;
91	}
92
93	if (creg == dd->ipath_cregs->cr_wordsendcnt) {
94	if (val != dd->ipath_lastsword) {
95	dd->ipath_sword += val - dd->ipath_lastsword;
96	dd->ipath_lastsword = val;
97	}
98	val64 = dd->ipath_sword;
99	} else if (creg == dd->ipath_cregs->cr_wordrcvcnt) {
100	if (val != dd->ipath_lastrword) {
101	dd->ipath_rword += val - dd->ipath_lastrword;
102	dd->ipath_lastrword = val;
103	}
104	val64 = dd->ipath_rword;
105	} else if (creg == dd->ipath_cregs->cr_pktsendcnt) {
106	if (val != dd->ipath_lastspkts) {
107	dd->ipath_spkts += val - dd->ipath_lastspkts;
108	dd->ipath_lastspkts = val;
109	}
110	val64 = dd->ipath_spkts;
111	} else if (creg == dd->ipath_cregs->cr_pktrcvcnt) {
112	if (val != dd->ipath_lastrpkts) {
113	dd->ipath_rpkts += val - dd->ipath_lastrpkts;
114	dd->ipath_lastrpkts = val;
115	}
116	val64 = dd->ipath_rpkts;
117	} else
118	val64 = (u64) val;
119
120	ret = val64;
121
122	bail:
123	return ret;
124	}
125
126	/**
127	* ipath_qcheck - print delta of egrfull/hdrqfull errors for kernel ports
128	* @dd: the infinipath device
129	*
130	* print the delta of egrfull/hdrqfull errors for kernel ports no more than
131	* every 5 seconds. User processes are printed at close, but kernel doesn't
132	* close, so... Separate routine so may call from other places someday, and
133	* so function name when printed by _IPATH_INFO is meaningfull
134	*/
135	static void ipath_qcheck(struct ipath_devdata *dd)
136	{
137	static u64 last_tot_hdrqfull;
138	size_t blen = 0;
139	char buf[128];
140
141	*buf = 0;
142	if (dd->ipath_pd[0]->port_hdrqfull != dd->ipath_p0_hdrqfull) {
143	blen = snprintf(buf, sizeof buf, "port 0 hdrqfull %u",
144	dd->ipath_pd[0]->port_hdrqfull -
145	dd->ipath_p0_hdrqfull);
146	dd->ipath_p0_hdrqfull = dd->ipath_pd[0]->port_hdrqfull;
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
178	if (dd->ipath_port0head != (u32)
179	le64_to_cpu(*dd->ipath_hdrqtailptr)) {
180	if (dd->ipath_lastport0rcv_cnt ==
181	ipath_stats.sps_port0pkts) {
182	ipath_cdbg(PKT, "missing rcv interrupts? "
183	"port0 hd=%llx tl=%x; port0pkts %llx\n",
184	(unsigned long long)
185	le64_to_cpu(*dd->ipath_hdrqtailptr),
186	dd->ipath_port0head,
187	(unsigned long long)
188	ipath_stats.sps_port0pkts);
108ecf0d BS	189	}
	190	dd->ipath_lastport0rcv_cnt = ipath_stats.sps_port0pkts;
	191	}
	192	}
	193
	194	/**
	195	* ipath_get_faststats - get word counters from chip before they overflow
	196	* @opaque - contains a pointer to the infinipath device ipath_devdata
	197	*
	198	* called from add_timer
	199	*/
	200	void ipath_get_faststats(unsigned long opaque)
	201	{
	202	struct ipath_devdata dd = (struct ipath_devdata ) opaque;
	203	u32 val;
	204	static unsigned cnt;
	205
	206	/*
	207	* don't access the chip while running diags, or memory diags can
	208	* fail
	209	*/
	210	if (!dd->ipath_kregbase \|\| !(dd->ipath_flags & IPATH_PRESENT) \|\|
	211	ipath_diag_inuse)
	212	/* but re-arm the timer, for diags case; won't hurt other */
	213	goto done;
	214
	215	if (dd->ipath_flags & IPATH_32BITCOUNTERS) {
	216	ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordsendcnt);
	217	ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordrcvcnt);
	218	ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktsendcnt);
	219	ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktrcvcnt);
	220	}
	221
	222	ipath_qcheck(dd);
	223
	224	/*
	225	* deal with repeat error suppression. Doesn't really matter if
	226	* last error was almost a full interval ago, or just a few usecs
	227	* ago; still won't get more than 2 per interval. We may want
	228	* longer intervals for this eventually, could do with mod, counter
	229	* or separate timer. Also see code in ipath_handle_errors() and
	230	* ipath_handle_hwerrors().
	231	*/
	232
	233	if (dd->ipath_lasterror)
	234	dd->ipath_lasterror = 0;
	235	if (dd->ipath_lasthwerror)
	236	dd->ipath_lasthwerror = 0;
	237	if ((dd->ipath_maskederrs & ~dd->ipath_ignorederrs)
	238	&& time_after(jiffies, dd->ipath_unmasktime)) {
	239	char ebuf[256];
	240	ipath_decode_err(ebuf, sizeof ebuf,
	241	(dd->ipath_maskederrs & ~dd->
	242	ipath_ignorederrs));
	243	if ((dd->ipath_maskederrs & ~dd->ipath_ignorederrs) &
	244	~(INFINIPATH_E_RRCVEGRFULL \| INFINIPATH_E_RRCVHDRFULL))
	245	ipath_dev_err(dd, "Re-enabling masked errors "
	246	"(%s)\n", ebuf);
	247	else {
	248	/*
	249	* rcvegrfull and rcvhdrqfull are "normal", for some
	250	* types of processes (mostly benchmarks) that send
	251	* huge numbers of messages, while not processing
	252	* them. So only complain about these at debug
253	* level.
254	*/
255	ipath_dbg("Disabling frequent queue full errors "
256	"(%s)\n", ebuf);
257	}
258	dd->ipath_maskederrs = dd->ipath_ignorederrs;
259	ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask,
260	~dd->ipath_maskederrs);
261	}
262
263	/* limit qfull messages to ~one per minute per port */
264	if ((++cnt & 0x10)) {
265	for (val = dd->ipath_cfgports - 1; ((int)val) >= 0;
266	val--) {
267	if (dd->ipath_lastegrheads[val] != -1)
268	dd->ipath_lastegrheads[val] = -1;
269	if (dd->ipath_lastrcvhdrqtails[val] != -1)
270	dd->ipath_lastrcvhdrqtails[val] = -1;
271	}
272	}
273
108ecf0d BS	274	done:
	275	mod_timer(&dd->ipath_stats_timer, jiffies + HZ * 5);
	276	}