litmus-rt.git - The LITMUS^RT kernel.

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Diffstat (limited to 'lib/string_helpers.c')

0 files changed, 0 insertions, 0 deletions

/* * 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" #include "ipath_verbs.h" #include "ipath_common.h" /* * Called when we might have an error that is specific to a particular * PIO buffer, and may need to cancel that buffer, so it can be re-used. */ void ipath_disarm_senderrbufs(struct ipath_devdata *dd) { u32 piobcnt; unsigned long sbuf[4]; /* * it's possible that sendbuffererror could have bits set; might * have already done this as a result of hardware error handling */ piobcnt = dd->ipath_piobcnt2k + dd->ipath_piobcnt4k; /* read these before writing errorclear */ sbuf[0] = ipath_read_kreg64( dd, dd->ipath_kregs->kr_sendbuffererror); sbuf[1] = ipath_read_kreg64( dd, dd->ipath_kregs->kr_sendbuffererror + 1); if (piobcnt > 128) { sbuf[2] = ipath_read_kreg64( dd, dd->ipath_kregs->kr_sendbuffererror + 2); sbuf[3] = ipath_read_kreg64( dd, dd->ipath_kregs->kr_sendbuffererror + 3); } if (sbuf[0] || sbuf[1] || (piobcnt > 128 && (sbuf[2] || sbuf[3]))) { int i; if (ipath_debug & (__IPATH_PKTDBG|__IPATH_DBG)) { __IPATH_DBG_WHICH(__IPATH_PKTDBG|__IPATH_DBG, "SendbufErrs %lx %lx", sbuf[0], sbuf[1]); if (ipath_debug & __IPATH_PKTDBG && piobcnt > 128) printk(" %lx %lx ", sbuf[2], sbuf[3]); printk("\n"); } for (i = 0; i < piobcnt; i++) if (test_bit(i, sbuf)) ipath_disarm_piobufs(dd, i, 1); dd->ipath_lastcancel = jiffies+3; /* no armlaunch for a bit */ } } /* These are all rcv-related errors which we want to count for stats */ #define E_SUM_PKTERRS \ (INFINIPATH_E_RHDRLEN | INFINIPATH_E_RBADTID | \ INFINIPATH_E_RBADVERSION | INFINIPATH_E_RHDR | \ INFINIPATH_E_RLONGPKTLEN | INFINIPATH_E_RSHORTPKTLEN | \ INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RMINPKTLEN | \ INFINIPATH_E_RFORMATERR | INFINIPATH_E_RUNSUPVL | \ INFINIPATH_E_RUNEXPCHAR | INFINIPATH_E_REBP) /* These are all send-related errors which we want to count for stats */ #define E_SUM_ERRS \ (INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM | \ INFINIPATH_E_SDROPPEDDATAPKT | INFINIPATH_E_SDROPPEDSMPPKT | \ INFINIPATH_E_SMAXPKTLEN | INFINIPATH_E_SUNSUPVL | \ INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SPKTLEN | \ INFINIPATH_E_INVALIDADDR) /* * these are errors that can occur when the link changes state while * a packet is being sent or received. This doesn't cover things * like EBP or VCRC that can be the result of a sending having the * link change state, so we receive a "known bad" packet. */ #define E_SUM_LINK_PKTERRS \ (INFINIPATH_E_SDROPPEDDATAPKT | INFINIPATH_E_SDROPPEDSMPPKT | \ INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SPKTLEN | \ INFINIPATH_E_RSHORTPKTLEN | INFINIPATH_E_RMINPKTLEN | \ INFINIPATH_E_RUNEXPCHAR) static u64 handle_e_sum_errs(struct ipath_devdata *dd, ipath_err_t errs) { u64 ignore_this_time = 0; ipath_disarm_senderrbufs(dd); if ((errs & E_SUM_LINK_PKTERRS) && !(dd->ipath_flags & IPATH_LINKACTIVE)) { /* * This can happen when SMA is trying to bring the link * up, but the IB link changes state at the "wrong" time. * The IB logic then complains that the packet isn't * valid. We don't want to confuse people, so we just * don't print them, except at debug */ ipath_dbg("Ignoring packet errors %llx, because link not " "ACTIVE\n", (unsigned long long) errs); ignore_this_time = errs & E_SUM_LINK_PKTERRS; } return ignore_this_time; } /* generic hw error messages... */ #define INFINIPATH_HWE_TXEMEMPARITYERR_MSG(a) \ { \ .mask = ( INFINIPATH_HWE_TXEMEMPARITYERR_##a << \ INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT ), \ .msg = "TXE " #a " Memory Parity" \ } #define INFINIPATH_HWE_RXEMEMPARITYERR_MSG(a) \ { \ .mask = ( INFINIPATH_HWE_RXEMEMPARITYERR_##a << \ INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT ), \ .msg = "RXE " #a " Memory Parity" \ } static const struct ipath_hwerror_msgs ipath_generic_hwerror_msgs[] = { INFINIPATH_HWE_MSG(IBCBUSFRSPCPARITYERR, "IPATH2IB Parity"), INFINIPATH_HWE_MSG(IBCBUSTOSPCPARITYERR, "IB2IPATH Parity"), INFINIPATH_HWE_TXEMEMPARITYERR_MSG(PIOBUF), INFINIPATH_HWE_TXEMEMPARITYERR_MSG(PIOPBC), INFINIPATH_HWE_TXEMEMPARITYERR_MSG(PIOLAUNCHFIFO), INFINIPATH_HWE_RXEMEMPARITYERR_MSG(RCVBUF), INFINIPATH_HWE_RXEMEMPARITYERR_MSG(LOOKUPQ), INFINIPATH_HWE_RXEMEMPARITYERR_MSG(EAGERTID), INFINIPATH_HWE_RXEMEMPARITYERR_MSG(EXPTID), INFINIPATH_HWE_RXEMEMPARITYERR_MSG(FLAGBUF), INFINIPATH_HWE_RXEMEMPARITYERR_MSG(DATAINFO), INFINIPATH_HWE_RXEMEMPARITYERR_MSG(HDRINFO), }; /** * ipath_format_hwmsg - format a single hwerror message * @msg message buffer * @msgl length of message buffer * @hwmsg message to add to message buffer */ static void ipath_format_hwmsg(char *msg, size_t msgl, const char *hwmsg) { strlcat(msg, "[", msgl); strlcat(msg, hwmsg, msgl); strlcat(msg, "]", msgl); } /** * ipath_format_hwerrors - format hardware error messages for display * @hwerrs hardware errors bit vector * @hwerrmsgs hardware error descriptions * @nhwerrmsgs number of hwerrmsgs * @msg message buffer * @msgl message buffer length */ void ipath_format_hwerrors(u64 hwerrs, const struct ipath_hwerror_msgs *hwerrmsgs, size_t nhwerrmsgs, char *msg, size_t msgl) { int i; const int glen = sizeof(ipath_generic_hwerror_msgs) / sizeof(ipath_generic_hwerror_msgs[0]); for (i=0; i<glen; i++) { if (hwerrs & ipath_generic_hwerror_msgs[i].mask) { ipath_format_hwmsg(msg, msgl, ipath_generic_hwerror_msgs[i].msg); } } for (i=0; i<nhwerrmsgs; i++) { if (hwerrs & hwerrmsgs[i].mask) { ipath_format_hwmsg(msg, msgl, hwerrmsgs[i].msg); } } } /* return the strings for the most common link states */ static char *ib_linkstate(u32 linkstate) { char *ret; switch (linkstate) { case IPATH_IBSTATE_INIT: ret = "Init"; break; case IPATH_IBSTATE_ARM: ret = "Arm"; break; case IPATH_IBSTATE_ACTIVE: ret = "Active"; break; default: ret = "Down"; } return ret; } static void handle_e_ibstatuschanged(struct ipath_devdata *dd, ipath_err_t errs, int noprint) { u64 val; u32 ltstate, lstate; /* * even if diags are enabled, we want to notice LINKINIT, etc. * We just don't want to change the LED state, or * dd->ipath_kregs->kr_ibcctrl */ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); lstate = val & IPATH_IBSTATE_MASK; /* * this is confusing enough when it happens that I want to always put it * on the console and in the logs. If it was a requested state change, * we'll have already cleared the flags, so we won't print this warning */ if ((lstate != IPATH_IBSTATE_ARM && lstate != IPATH_IBSTATE_ACTIVE) && (dd->ipath_flags & (IPATH_LINKARMED | IPATH_LINKACTIVE))) { dev_info(&dd->pcidev->dev, "Link state changed from %s to %s\n", (dd->ipath_flags & IPATH_LINKARMED) ? "ARM" : "ACTIVE", ib_linkstate(lstate)); /* * Flush all queued sends when link went to DOWN or INIT, * to be sure that they don't block SMA and other MAD packets */ ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, INFINIPATH_S_ABORT); ipath_disarm_piobufs(dd, dd->ipath_lastport_piobuf, (unsigned)(dd->ipath_piobcnt2k + dd->ipath_piobcnt4k) - dd->ipath_lastport_piobuf); } else if (lstate == IPATH_IBSTATE_INIT || lstate == IPATH_IBSTATE_ARM || lstate == IPATH_IBSTATE_ACTIVE) { /* * only print at SMA if there is a change, debug if not * (sometimes we want to know that, usually not). */ if (lstate == ((unsigned) dd->ipath_lastibcstat & IPATH_IBSTATE_MASK)) { ipath_dbg("Status change intr but no change (%s)\n", ib_linkstate(lstate)); } else ipath_cdbg(VERBOSE, "Unit %u link state %s, last " "was %s\n", dd->ipath_unit, ib_linkstate(lstate), ib_linkstate((unsigned) dd->ipath_lastibcstat & IPATH_IBSTATE_MASK)); } else { lstate = dd->ipath_lastibcstat & IPATH_IBSTATE_MASK; if (lstate == IPATH_IBSTATE_INIT || lstate == IPATH_IBSTATE_ARM || lstate == IPATH_IBSTATE_ACTIVE) ipath_cdbg(VERBOSE, "Unit %u link state down" " (state 0x%x), from %s\n", dd->ipath_unit, (u32)val & IPATH_IBSTATE_MASK, ib_linkstate(lstate)); else ipath_cdbg(VERBOSE, "Unit %u link state changed " "to 0x%x from down (%x)\n", dd->ipath_unit, (u32) val, lstate); } ltstate = (val >> INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) & INFINIPATH_IBCS_LINKTRAININGSTATE_MASK; lstate = (val >> INFINIPATH_IBCS_LINKSTATE_SHIFT) & INFINIPATH_IBCS_LINKSTATE_MASK; if (ltstate == INFINIPATH_IBCS_LT_STATE_POLLACTIVE || ltstate == INFINIPATH_IBCS_LT_STATE_POLLQUIET) { u32 last_ltstate; /* * Ignore cycling back and forth from Polling.Active * to Polling.Quiet while waiting for the other end of * the link to come up. We will cycle back and forth * between them if no cable is plugged in, * the other device is powered off or disabled, etc. */ last_ltstate = (dd->ipath_lastibcstat >> INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) & INFINIPATH_IBCS_LINKTRAININGSTATE_MASK; if (last_ltstate == INFINIPATH_IBCS_LT_STATE_POLLACTIVE || last_ltstate == INFINIPATH_IBCS_LT_STATE_POLLQUIET) { if (dd->ipath_ibpollcnt > 40) { dd->ipath_flags |= IPATH_NOCABLE; *dd->ipath_statusp |= IPATH_STATUS_IB_NOCABLE; } else dd->ipath_ibpollcnt++; goto skip_ibchange; } } dd->ipath_ibpollcnt = 0; /* some state other than 2 or 3 */ ipath_stats.sps_iblink++; if (ltstate != INFINIPATH_IBCS_LT_STATE_LINKUP) { dd->ipath_flags |= IPATH_LINKDOWN; dd->ipath_flags &= ~(IPATH_LINKUNK | IPATH_LINKINIT | IPATH_LINKACTIVE | IPATH_LINKARMED); *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY; dd->ipath_lli_counter = 0; if (!noprint) { if (((dd->ipath_lastibcstat >> INFINIPATH_IBCS_LINKSTATE_SHIFT) & INFINIPATH_IBCS_LINKSTATE_MASK) == INFINIPATH_IBCS_L_STATE_ACTIVE) /* if from up to down be more vocal */ ipath_cdbg(VERBOSE, "Unit %u link now down (%s)\n", dd->ipath_unit, ipath_ibcstatus_str[ltstate]); else ipath_cdbg(VERBOSE, "Unit %u link is " "down (%s)\n", dd->ipath_unit, ipath_ibcstatus_str[ltstate]); } dd->ipath_f_setextled(dd, lstate, ltstate); } else if ((val & IPATH_IBSTATE_MASK) == IPATH_IBSTATE_ACTIVE) { dd->ipath_flags |= IPATH_LINKACTIVE; dd->ipath_flags &= ~(IPATH_LINKUNK | IPATH_LINKINIT | IPATH_LINKDOWN | IPATH_LINKARMED | IPATH_NOCABLE); *dd->ipath_statusp &= ~IPATH_STATUS_IB_NOCABLE; *dd->ipath_statusp |= IPATH_STATUS_IB_READY | IPATH_STATUS_IB_CONF; dd->ipath_f_setextled(dd, lstate, ltstate); } else if ((val & IPATH_IBSTATE_MASK) == IPATH_IBSTATE_INIT) { /* * set INIT and DOWN. Down is checked by most of the other * code, but INIT is useful to know in a few places. */ dd->ipath_flags |= IPATH_LINKINIT | IPATH_LINKDOWN; dd->ipath_flags &= ~(IPATH_LINKUNK | IPATH_LINKACTIVE | IPATH_LINKARMED | IPATH_NOCABLE); *dd->ipath_statusp &= ~(IPATH_STATUS_IB_NOCABLE | IPATH_STATUS_IB_READY); dd->ipath_f_setextled(dd, lstate, ltstate); } else if ((val & IPATH_IBSTATE_MASK) == IPATH_IBSTATE_ARM) { dd->ipath_flags |= IPATH_LINKARMED; dd->ipath_flags &= ~(IPATH_LINKUNK | IPATH_LINKDOWN | IPATH_LINKINIT | IPATH_LINKACTIVE | IPATH_NOCABLE); *dd->ipath_statusp &= ~(IPATH_STATUS_IB_NOCABLE | IPATH_STATUS_IB_READY); dd->ipath_f_setextled(dd, lstate, ltstate); } else { if (!noprint) ipath_dbg("IBstatuschange unit %u: %s (%x)\n", dd->ipath_unit, ipath_ibcstatus_str[ltstate], ltstate); } skip_ibchange: dd->ipath_lastibcstat = val; } static void handle_supp_msgs(struct ipath_devdata *dd, unsigned supp_msgs, char msg[512]) { /* * Print the message unless it's ibc status change only, which * happens so often we never want to count it. */ if (dd->ipath_lasterror & ~INFINIPATH_E_IBSTATUSCHANGED) { ipath_decode_err(msg, sizeof msg, dd->ipath_lasterror & ~INFINIPATH_E_IBSTATUSCHANGED); if (dd->ipath_lasterror & ~(INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL)) ipath_dev_err(dd, "Suppressed %u messages for " "fast-repeating errors (%s) (%llx)\n", supp_msgs, msg, (unsigned long long) dd->ipath_lasterror); 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("Suppressed %u messages for %s\n", supp_msgs, msg); } } } static unsigned handle_frequent_errors(struct ipath_devdata *dd, ipath_err_t errs, char msg[512], int *noprint) { unsigned long nc; static unsigned long nextmsg_time; static unsigned nmsgs, supp_msgs; /* * Throttle back "fast" messages to no more than 10 per 5 seconds. * This isn't perfect, but it's a reasonable heuristic. If we get * more than 10, give a 6x longer delay. */ nc = jiffies; if (nmsgs > 10) { if (time_before(nc, nextmsg_time)) { *noprint = 1; if (!supp_msgs++) nextmsg_time = nc + HZ * 3; } else if (supp_msgs) { handle_supp_msgs(dd, supp_msgs, msg); supp_msgs = 0; nmsgs = 0; } } else if (!nmsgs++ || time_after(nc, nextmsg_time)) nextmsg_time = nc + HZ / 2; return supp_msgs; } static int handle_errors(struct ipath_devdata *dd, ipath_err_t errs) { char msg[512]; u64 ignore_this_time = 0; int i; int chkerrpkts = 0, noprint = 0; unsigned supp_msgs; supp_msgs = handle_frequent_errors(dd, errs, msg, &noprint); /* * don't report errors that are masked (includes those always * ignored) */ errs &= ~dd->ipath_maskederrs; /* do these first, they are most important */ if (errs & INFINIPATH_E_HARDWARE) { /* reuse same msg buf */ dd->ipath_f_handle_hwerrors(dd, msg, sizeof msg); } if (!noprint && (errs & ~dd->ipath_e_bitsextant)) ipath_dev_err(dd, "error interrupt with unknown errors " "%llx set\n", (unsigned long long) (errs & ~dd->ipath_e_bitsextant)); if (errs & E_SUM_ERRS) ignore_this_time = handle_e_sum_errs(dd, errs); else if ((errs & E_SUM_LINK_PKTERRS) && !(dd->ipath_flags & IPATH_LINKACTIVE)) { /* * This can happen when SMA is trying to bring the link * up, but the IB link changes state at the "wrong" time. * The IB logic then complains that the packet isn't * valid. We don't want to confuse people, so we just * don't print them, except at debug */ ipath_dbg("Ignoring packet errors %llx, because link not " "ACTIVE\n", (unsigned long long) errs); ignore_this_time = errs & E_SUM_LINK_PKTERRS; } if (supp_msgs == 250000) { /* * It's not entirely reasonable assuming that the errors set * in the last clear period are all responsible for the * problem, but the alternative is to assume it's the only * ones on this particular interrupt, which also isn't great */ dd->ipath_maskederrs |= dd->ipath_lasterror | errs; ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, ~dd->ipath_maskederrs); ipath_decode_err(msg, sizeof msg, (dd->ipath_maskederrs & ~dd-> ipath_ignorederrs)); if ((dd->ipath_maskederrs & ~dd->ipath_ignorederrs) & ~(INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL)) ipath_dev_err(dd, "Disabling error(s) %llx because " "occurring too frequently (%s)\n", (unsigned long long) (dd->ipath_maskederrs & ~dd->ipath_ignorederrs), msg); 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", msg); } /* * Re-enable the masked errors after around 3 minutes. in * ipath_get_faststats(). If we have a series of fast * repeating but different errors, the interval will keep * stretching out, but that's OK, as that's pretty * catastrophic. */ dd->ipath_unmasktime = jiffies + HZ * 180; } ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, errs); if (ignore_this_time) errs &= ~ignore_this_time; if (errs & ~dd->ipath_lasterror) { errs &= ~dd->ipath_lasterror; /* never suppress duplicate hwerrors or ibstatuschange */ dd->ipath_lasterror |= errs & ~(INFINIPATH_E_HARDWARE | INFINIPATH_E_IBSTATUSCHANGED); } /* likely due to cancel, so suppress */ if ((errs & (INFINIPATH_E_SPKTLEN | INFINIPATH_E_SPIOARMLAUNCH)) && dd->ipath_lastcancel > jiffies) { ipath_dbg("Suppressed armlaunch/spktlen after error send cancel\n"); errs &= ~(INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SPKTLEN); } if (!errs) return 0; if (!noprint) /* * the ones we mask off are handled specially below or above */ ipath_decode_err(msg, sizeof msg, errs & ~(INFINIPATH_E_IBSTATUSCHANGED | INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL | INFINIPATH_E_HARDWARE)); else /* so we don't need if (!noprint) at strlcat's below */ *msg = 0; if (errs & E_SUM_PKTERRS) { ipath_stats.sps_pkterrs++; chkerrpkts = 1; } if (errs & E_SUM_ERRS) ipath_stats.sps_errs++; if (errs & (INFINIPATH_E_RICRC | INFINIPATH_E_RVCRC)) { ipath_stats.sps_crcerrs++; chkerrpkts = 1; } /* * We don't want to print these two as they happen, or we can make * the situation even worse, because it takes so long to print * messages to serial consoles. Kernel ports get printed from * fast_stats, no more than every 5 seconds, user ports get printed * on close */ if (errs & INFINIPATH_E_RRCVHDRFULL) { int any; u32 hd, tl; ipath_stats.sps_hdrqfull++; for (any = i = 0; i < dd->ipath_cfgports; i++) { struct ipath_portdata *pd = dd->ipath_pd[i]; if (i == 0) { hd = dd->ipath_port0head; tl = (u32) le64_to_cpu( *dd->ipath_hdrqtailptr); } else if (pd && pd->port_cnt && pd->port_rcvhdrtail_kvaddr) { /* * don't report same point multiple times, * except kernel */ tl = *(u64 *) pd->port_rcvhdrtail_kvaddr; if (tl == dd->ipath_lastrcvhdrqtails[i]) continue; hd = ipath_read_ureg32(dd, ur_rcvhdrhead, i); } else continue; if (hd == (tl + 1) || (!hd && tl == dd->ipath_hdrqlast)) { if (i == 0) chkerrpkts = 1; dd->ipath_lastrcvhdrqtails[i] = tl; pd->port_hdrqfull++; } } } if (errs & INFINIPATH_E_RRCVEGRFULL) { /* * since this is of less importance and not likely to * happen without also getting hdrfull, only count * occurrences; don't check each port (or even the kernel * vs user) */ ipath_stats.sps_etidfull++; if (dd->ipath_port0head != (u32) le64_to_cpu(*dd->ipath_hdrqtailptr)) chkerrpkts = 1; } /* * do this before IBSTATUSCHANGED, in case both bits set in a single * interrupt; we want the STATUSCHANGE to "win", so we do our * internal copy of state machine correctly */ if (errs & INFINIPATH_E_RIBLOSTLINK) { /* * force through block below */ errs |= INFINIPATH_E_IBSTATUSCHANGED; ipath_stats.sps_iblink++; dd->ipath_flags |= IPATH_LINKDOWN; dd->ipath_flags &= ~(IPATH_LINKUNK | IPATH_LINKINIT | IPATH_LINKARMED | IPATH_LINKACTIVE); *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY; if (!noprint) { u64 st = ipath_read_kreg64( dd, dd->ipath_kregs->kr_ibcstatus); ipath_dbg("Lost link, link now down (%s)\n", ipath_ibcstatus_str[st & 0xf]); } } if (errs & INFINIPATH_E_IBSTATUSCHANGED) handle_e_ibstatuschanged(dd, errs, noprint); if (errs & INFINIPATH_E_RESET) { if (!noprint) ipath_dev_err(dd, "Got reset, requires re-init " "(unload and reload driver)\n"); dd->ipath_flags &= ~IPATH_INITTED; /* needs re-init */ /* mark as having had error */ *dd->ipath_statusp |= IPATH_STATUS_HWERROR; *dd->ipath_statusp &= ~IPATH_STATUS_IB_CONF; } if (!noprint && *msg) ipath_dev_err(dd, "%s error\n", msg); if (dd->ipath_state_wanted & dd->ipath_flags) { ipath_cdbg(VERBOSE, "driver wanted state %x, iflags now %x, " "waking\n", dd->ipath_state_wanted, dd->ipath_flags); wake_up_interruptible(&ipath_state_wait); } return chkerrpkts; } /* this is separate to allow for better optimization of ipath_intr() */ static void ipath_bad_intr(struct ipath_devdata *dd, u32 * unexpectp) { /* * sometimes happen during driver init and unload, don't want * to process any interrupts at that point */ /* this is just a bandaid, not a fix, if something goes badly * wrong */ if (++*unexpectp > 100) { if (++*unexpectp > 105) { /* * ok, we must be taking somebody else's interrupts, * due to a messed up mptable and/or PIRQ table, so * unregister the interrupt. We've seen this during * linuxbios development work, and it may happen in * the future again. */ if (dd->pcidev && dd->ipath_irq) { ipath_dev_err(dd, "Now %u unexpected " "interrupts, unregistering " "interrupt handler\n", *unexpectp); ipath_dbg("free_irq of irq %d\n", dd->ipath_irq); dd->ipath_f_free_irq(dd); } } if (ipath_read_kreg32(dd, dd->ipath_kregs->kr_intmask)) { ipath_dev_err(dd, "%u unexpected interrupts, " "disabling interrupts completely\n", *unexpectp); /* * disable all interrupts, something is very wrong */ ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL); } } else if (*unexpectp > 1) ipath_dbg("Interrupt when not ready, should not happen, " "ignoring\n"); } static void ipath_bad_regread(struct ipath_devdata *dd) { static int allbits;


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