/*
* Copyright (c) 2006, 2007, 2008 QLogic Corporation. 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 "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 if (creg == dd->ipath_cregs->cr_ibsymbolerrcnt) {
if (dd->ibdeltainprog)
val64 -= val64 - dd->ibsymsnap;
val64 -= dd->ibsymdelta;
} else if (creg == dd->ipath_cregs->cr_iblinkerrrecovcnt) {
if (dd->ibdeltainprog)
val64 -= val64 - dd->iblnkerrsnap;
val64 -= dd->iblnkerrdelta;
} 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;
struct ipath_portdata *pd = dd->ipath_pd[0];
size_t blen = 0;
char buf[128];
u32 hdrqtail;
*buf = 0;
if (pd->port_hdrqfull != dd->ipath_p0_hdrqfull) {
blen = snprintf(buf, sizeof buf, "port 0 hdrqfull %u",
pd->port_hdrqfull -
dd->ipath_p0_hdrqfull);
dd->ipath_p0_hdrqfull = pd->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);
hdrqtail = ipath_get_hdrqtail(pd);
if (pd->port_head != hdrqtail) {
if (dd->ipath_lastport0rcv_cnt ==
ipath_stats.sps_port0pkts) {
ipath_cdbg(PKT, "missing rcv interrupts? "
"port0 hd=%x tl=%x; port0pkts %llx; write"
" hd (w/intr)\n",
pd->port_head, hdrqtail,
(unsigned long long)
ipath_stats.sps_port0pkts);
ipath_write_ureg(dd, ur_rcvhdrhead, hdrqtail |
dd->ipath_rhdrhead_intr_off, pd->port_port);
}
dd->ipath_lastport0rcv_cnt = ipath_stats.sps_port0pkts;
}
}
static void ipath_chk_errormask(struct ipath_devdata *dd)
{
static u32 fixed;
u32 ctrl;
unsigned long errormask;
unsigned long hwerrs;
if (!dd->ipath_errormask || !(dd->ipath_flags & IPATH_INITTED))
return;
errormask = ipath_read_kreg64(dd, dd->ipath_kregs->kr_errormask);
if (errormask == dd->ipath_errormask)
return;
fixed++;
hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask,
dd->ipath_errormask);
if ((hwerrs & dd->ipath_hwerrmask) ||
(ctrl & INFINIPATH_C_FREEZEMODE)) {
/* force re-interrupt of pending events, just in case */
ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, 0ULL);
ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, 0ULL);
ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, 0ULL);
dev_info(&dd->pcidev->dev,
"errormask fixed(%u) %lx -> %lx, ctrl %x hwerr %lx\n",
fixed, errormask, (unsigned long)dd->ipath_errormask,
ctrl, hwerrs);
} else
ipath_dbg("errormask fixed(%u) %lx -> %lx, no freeze\n",
fixed, errormask,
(unsigned long)dd->ipath_errormask);
}
/**
* 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;
int i;
static unsigned cnt;
unsigned long flags;
u64 traffic_wds;
/*
* don't access the chip while running diags, or memory diags can
* fail
*/
if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_INITTED) ||
ipath_diag_inuse)
/* but re-arm the timer, for diags case; won't hurt other */
goto done;
/*
* We now try to maintain a "active timer", based on traffic
* exceeding a threshold, so we need to check the word-counts
* even if they are 64-bit.
*/
traffic_wds = ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordsendcnt) +
ipath_snap_cntr(dd, dd->ipath_cregs->cr_wordrcvcnt);
spin_lock_irqsave(&dd->ipath_eep_st_lock, flags);
traffic_wds -= dd->ipath_traffic_wds;
dd->ipath_traffic_wds += traffic_wds;
if (traffic_wds >= IPATH_TRAFFIC_ACTIVE_THRESHOLD)
atomic_add(5, &dd->ipath_active_time); /* S/B #define */
spin_unlock_irqrestore(&dd->ipath_eep_st_lock, flags);
if (dd->ipath_flags & IPATH_32BITCOUNTERS) {
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
&& time_after(jiffies, dd->ipath_unmasktime)) {
char ebuf[256];
int iserr;
iserr = ipath_decode_err(dd, ebuf, sizeof ebuf,
dd->ipath_maskederrs);
if (dd->ipath_maskederrs &
~(INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
INFINIPATH_E_PKTERRS))
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.
*/
if (iserr)
ipath_dbg(
"Re-enabling queue full errors (%s)\n",
ebuf);
else
ipath_cdbg(ERRPKT, "Re-enabling packet"
" problem interrupt (%s)\n", ebuf);
}
/* re-enable masked errors */
dd->ipath_errormask |= dd->ipath_maskederrs;
ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask,
dd->ipath_errormask);
dd->ipath_maskederrs = 0;
}
/* limit qfull messages to ~one per minute per port */
if ((++cnt & 0x10)) {
for (i = (int) dd->ipath_cfgports; --i >= 0; ) {
struct ipath_portdata *pd = dd->ipath_pd[i];
if (pd && pd->port_lastrcvhdrqtail != -1)
pd->port_lastrcvhdrqtail = -1;
}
}
ipath_chk_errormask(dd);
done:
mod_timer(&dd->ipath_stats_timer, jiffies + HZ * 5);
}