diff options
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_intr.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_intr.c | 1273 |
1 files changed, 0 insertions, 1273 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_intr.c b/drivers/infiniband/hw/ipath/ipath_intr.c deleted file mode 100644 index 01ba792791a0..000000000000 --- a/drivers/infiniband/hw/ipath/ipath_intr.c +++ /dev/null @@ -1,1273 +0,0 @@ -/* - * 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 <linux/pci.h> -#include <linux/delay.h> -#include <linux/sched.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); - if (piobcnt > 192) - sbuf[3] = ipath_read_kreg64( - dd, dd->ipath_kregs->kr_sendbuffererror + 3); - else - sbuf[3] = 0; - - if (sbuf[0] || sbuf[1] || (piobcnt > 128 && (sbuf[2] || sbuf[3]))) { - int i; - if (ipath_debug & (__IPATH_PKTDBG|__IPATH_DBG) && - time_after(dd->ipath_lastcancel, jiffies)) { - __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); - /* ignore armlaunch errs for a bit */ - dd->ipath_lastcancel = jiffies+3; - } -} - - -/* 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) - -/* - * this is similar to E_SUM_ERRS, but can't ignore armlaunch, don't ignore - * errors not related to freeze and cancelling buffers. Can't ignore - * armlaunch because could get more while still cleaning up, and need - * to cancel those as they happen. - */ -#define E_SPKT_ERRS_IGNORE \ - (INFINIPATH_E_SDROPPEDDATAPKT | INFINIPATH_E_SDROPPEDSMPPKT | \ - INFINIPATH_E_SMAXPKTLEN | INFINIPATH_E_SMINPKTLEN | \ - INFINIPATH_E_SPKTLEN) - -/* - * 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 = - ARRAY_SIZE(ipath_generic_hwerror_msgs); - - 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(struct ipath_devdata *dd, u64 ibcs) -{ - char *ret; - u32 state; - - state = ipath_ib_state(dd, ibcs); - if (state == dd->ib_init) - ret = "Init"; - else if (state == dd->ib_arm) - ret = "Arm"; - else if (state == dd->ib_active) - ret = "Active"; - else - ret = "Down"; - return ret; -} - -void signal_ib_event(struct ipath_devdata *dd, enum ib_event_type ev) -{ - struct ib_event event; - - event.device = &dd->verbs_dev->ibdev; - event.element.port_num = 1; - event.event = ev; - ib_dispatch_event(&event); -} - -static void handle_e_ibstatuschanged(struct ipath_devdata *dd, - ipath_err_t errs) -{ - u32 ltstate, lstate, ibstate, lastlstate; - u32 init = dd->ib_init; - u32 arm = dd->ib_arm; - u32 active = dd->ib_active; - const u64 ibcs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); - - lstate = ipath_ib_linkstate(dd, ibcs); /* linkstate */ - ibstate = ipath_ib_state(dd, ibcs); - /* linkstate at last interrupt */ - lastlstate = ipath_ib_linkstate(dd, dd->ipath_lastibcstat); - ltstate = ipath_ib_linktrstate(dd, ibcs); /* linktrainingtate */ - - /* - * Since going into a recovery state causes the link state to go - * down and since recovery is transitory, it is better if we "miss" - * ever seeing the link training state go into recovery (i.e., - * ignore this transition for link state special handling purposes) - * without even updating ipath_lastibcstat. - */ - if ((ltstate == INFINIPATH_IBCS_LT_STATE_RECOVERRETRAIN) || - (ltstate == INFINIPATH_IBCS_LT_STATE_RECOVERWAITRMT) || - (ltstate == INFINIPATH_IBCS_LT_STATE_RECOVERIDLE)) - goto done; - - /* - * if linkstate transitions into INIT from any of the various down - * states, or if it transitions from any of the up (INIT or better) - * states into any of the down states (except link recovery), then - * call the chip-specific code to take appropriate actions. - */ - if (lstate >= INFINIPATH_IBCS_L_STATE_INIT && - lastlstate == INFINIPATH_IBCS_L_STATE_DOWN) { - /* transitioned to UP */ - if (dd->ipath_f_ib_updown(dd, 1, ibcs)) { - /* link came up, so we must no longer be disabled */ - dd->ipath_flags &= ~IPATH_IB_LINK_DISABLED; - ipath_cdbg(LINKVERB, "LinkUp handled, skipped\n"); - goto skip_ibchange; /* chip-code handled */ - } - } else if ((lastlstate >= INFINIPATH_IBCS_L_STATE_INIT || - (dd->ipath_flags & IPATH_IB_FORCE_NOTIFY)) && - ltstate <= INFINIPATH_IBCS_LT_STATE_CFGWAITRMT && - ltstate != INFINIPATH_IBCS_LT_STATE_LINKUP) { - int handled; - handled = dd->ipath_f_ib_updown(dd, 0, ibcs); - dd->ipath_flags &= ~IPATH_IB_FORCE_NOTIFY; - if (handled) { - ipath_cdbg(LINKVERB, "LinkDown handled, skipped\n"); - goto skip_ibchange; /* chip-code handled */ - } - } - - /* - * Significant enough to always print and get into logs, if it was - * unexpected. If it was a requested state change, we'll have - * already cleared the flags, so we won't print this warning - */ - if ((ibstate != arm && 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(dd, ibcs)); - } - - if (ltstate == INFINIPATH_IBCS_LT_STATE_POLLACTIVE || - ltstate == INFINIPATH_IBCS_LT_STATE_POLLQUIET) { - u32 lastlts; - lastlts = ipath_ib_linktrstate(dd, dd->ipath_lastibcstat); - /* - * Ignore cycling back and forth from Polling.Active to - * Polling.Quiet while waiting for the other end of the link - * to come up, except to try and decide if we are connected - * to a live IB device or not. We will cycle back and - * forth between them if no cable is plugged in, the other - * device is powered off or disabled, etc. - */ - if (lastlts == INFINIPATH_IBCS_LT_STATE_POLLACTIVE || - lastlts == INFINIPATH_IBCS_LT_STATE_POLLQUIET) { - if (!(dd->ipath_flags & IPATH_IB_AUTONEG_INPROG) && - (++dd->ipath_ibpollcnt == 40)) { - dd->ipath_flags |= IPATH_NOCABLE; - *dd->ipath_statusp |= - IPATH_STATUS_IB_NOCABLE; - ipath_cdbg(LINKVERB, "Set NOCABLE\n"); - } - ipath_cdbg(LINKVERB, "POLL change to %s (%x)\n", - ipath_ibcstatus_str[ltstate], ibstate); - goto skip_ibchange; - } - } - - dd->ipath_ibpollcnt = 0; /* not poll*, now */ - ipath_stats.sps_iblink++; - - if (ibstate != init && dd->ipath_lastlinkrecov && ipath_linkrecovery) { - u64 linkrecov; - linkrecov = ipath_snap_cntr(dd, - dd->ipath_cregs->cr_iblinkerrrecovcnt); - if (linkrecov != dd->ipath_lastlinkrecov) { - ipath_dbg("IB linkrecov up %Lx (%s %s) recov %Lu\n", - (unsigned long long) ibcs, - ib_linkstate(dd, ibcs), - ipath_ibcstatus_str[ltstate], - (unsigned long long) linkrecov); - /* and no more until active again */ - dd->ipath_lastlinkrecov = 0; - ipath_set_linkstate(dd, IPATH_IB_LINKDOWN); - goto skip_ibchange; - } - } - - if (ibstate == init || ibstate == arm || ibstate == active) { - *dd->ipath_statusp &= ~IPATH_STATUS_IB_NOCABLE; - if (ibstate == init || ibstate == arm) { - *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY; - if (dd->ipath_flags & IPATH_LINKACTIVE) - signal_ib_event(dd, IB_EVENT_PORT_ERR); - } - if (ibstate == arm) { - dd->ipath_flags |= IPATH_LINKARMED; - dd->ipath_flags &= ~(IPATH_LINKUNK | - IPATH_LINKINIT | IPATH_LINKDOWN | - IPATH_LINKACTIVE | IPATH_NOCABLE); - ipath_hol_down(dd); - } else if (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_LINKARMED | IPATH_LINKACTIVE | - IPATH_NOCABLE); - ipath_hol_down(dd); - } else { /* active */ - dd->ipath_lastlinkrecov = ipath_snap_cntr(dd, - dd->ipath_cregs->cr_iblinkerrrecovcnt); - *dd->ipath_statusp |= - IPATH_STATUS_IB_READY | IPATH_STATUS_IB_CONF; - dd->ipath_flags |= IPATH_LINKACTIVE; - dd->ipath_flags &= ~(IPATH_LINKUNK | IPATH_LINKINIT - | IPATH_LINKDOWN | IPATH_LINKARMED | - IPATH_NOCABLE); - if (dd->ipath_flags & IPATH_HAS_SEND_DMA) - ipath_restart_sdma(dd); - signal_ib_event(dd, IB_EVENT_PORT_ACTIVE); - /* LED active not handled in chip _f_updown */ - dd->ipath_f_setextled(dd, lstate, ltstate); - ipath_hol_up(dd); - } - - /* - * print after we've already done the work, so as not to - * delay the state changes and notifications, for debugging - */ - if (lstate == lastlstate) - ipath_cdbg(LINKVERB, "Unchanged from last: %s " - "(%x)\n", ib_linkstate(dd, ibcs), ibstate); - else - ipath_cdbg(VERBOSE, "Unit %u: link up to %s %s (%x)\n", - dd->ipath_unit, ib_linkstate(dd, ibcs), - ipath_ibcstatus_str[ltstate], ibstate); - } else { /* down */ - if (dd->ipath_flags & IPATH_LINKACTIVE) - signal_ib_event(dd, IB_EVENT_PORT_ERR); - 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 (lastlstate != INFINIPATH_IBCS_L_STATE_DOWN) - ipath_cdbg(VERBOSE, "Unit %u link state down " - "(state 0x%x), from %s\n", - dd->ipath_unit, lstate, - ib_linkstate(dd, dd->ipath_lastibcstat)); - else - ipath_cdbg(LINKVERB, "Unit %u link state changed " - "to %s (0x%x) from down (%x)\n", - dd->ipath_unit, - ipath_ibcstatus_str[ltstate], - ibstate, lastlstate); - } - -skip_ibchange: - dd->ipath_lastibcstat = ibcs; -done: - return; -} - -static void handle_supp_msgs(struct ipath_devdata *dd, - unsigned supp_msgs, char *msg, u32 msgsz) -{ - /* - * 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) { - int iserr; - ipath_err_t mask; - iserr = ipath_decode_err(dd, msg, msgsz, - dd->ipath_lasterror & - ~INFINIPATH_E_IBSTATUSCHANGED); - - mask = INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL | - INFINIPATH_E_PKTERRS | INFINIPATH_E_SDMADISABLED; - - /* if we're in debug, then don't mask SDMADISABLED msgs */ - if (ipath_debug & __IPATH_DBG) - mask &= ~INFINIPATH_E_SDMADISABLED; - - if (dd->ipath_lasterror & ~mask) - 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. - */ - if (iserr) - ipath_dbg("Suppressed %u messages for %s\n", - supp_msgs, msg); - else - ipath_cdbg(ERRPKT, - "Suppressed %u messages for %s\n", - supp_msgs, msg); - } - } -} - -static unsigned handle_frequent_errors(struct ipath_devdata *dd, - ipath_err_t errs, char *msg, - u32 msgsz, 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, msgsz); - supp_msgs = 0; - nmsgs = 0; - } - } - else if (!nmsgs++ || time_after(nc, nextmsg_time)) - nextmsg_time = nc + HZ / 2; - - return supp_msgs; -} - -static void handle_sdma_errors(struct ipath_devdata *dd, ipath_err_t errs) -{ - unsigned long flags; - int expected; - - if (ipath_debug & __IPATH_DBG) { - char msg[128]; - ipath_decode_err(dd, msg, sizeof msg, errs & - INFINIPATH_E_SDMAERRS); - ipath_dbg("errors %lx (%s)\n", (unsigned long)errs, msg); - } - if (ipath_debug & __IPATH_VERBDBG) { - unsigned long tl, hd, status, lengen; - tl = ipath_read_kreg64(dd, dd->ipath_kregs->kr_senddmatail); - hd = ipath_read_kreg64(dd, dd->ipath_kregs->kr_senddmahead); - status = ipath_read_kreg64(dd - , dd->ipath_kregs->kr_senddmastatus); - lengen = ipath_read_kreg64(dd, - dd->ipath_kregs->kr_senddmalengen); - ipath_cdbg(VERBOSE, "sdma tl 0x%lx hd 0x%lx status 0x%lx " - "lengen 0x%lx\n", tl, hd, status, lengen); - } - - spin_lock_irqsave(&dd->ipath_sdma_lock, flags); - __set_bit(IPATH_SDMA_DISABLED, &dd->ipath_sdma_status); - expected = test_bit(IPATH_SDMA_ABORTING, &dd->ipath_sdma_status); - spin_unlock_irqrestore(&dd->ipath_sdma_lock, flags); - if (!expected) - ipath_cancel_sends(dd, 1); -} - -static void handle_sdma_intr(struct ipath_devdata *dd, u64 istat) -{ - unsigned long flags; - int expected; - - if ((istat & INFINIPATH_I_SDMAINT) && - !test_bit(IPATH_SDMA_SHUTDOWN, &dd->ipath_sdma_status)) - ipath_sdma_intr(dd); - - if (istat & INFINIPATH_I_SDMADISABLED) { - expected = test_bit(IPATH_SDMA_ABORTING, - &dd->ipath_sdma_status); - ipath_dbg("%s SDmaDisabled intr\n", - expected ? "expected" : "unexpected"); - spin_lock_irqsave(&dd->ipath_sdma_lock, flags); - __set_bit(IPATH_SDMA_DISABLED, &dd->ipath_sdma_status); - spin_unlock_irqrestore(&dd->ipath_sdma_lock, flags); - if (!expected) - ipath_cancel_sends(dd, 1); - if (!test_bit(IPATH_SDMA_SHUTDOWN, &dd->ipath_sdma_status)) - tasklet_hi_schedule(&dd->ipath_sdma_abort_task); - } -} - -static int handle_hdrq_full(struct ipath_devdata *dd) -{ - int chkerrpkts = 0; - u32 hd, tl; - u32 i; - - ipath_stats.sps_hdrqfull++; - for (i = 0; i < dd->ipath_cfgports; i++) { - struct ipath_portdata *pd = dd->ipath_pd[i]; - - if (i == 0) { - /* - * For kernel receive queues, we just want to know - * if there are packets in the queue that we can - * process. - */ - if (pd->port_head != ipath_get_hdrqtail(pd)) - chkerrpkts |= 1 << i; - continue; - } - - /* Skip if user context is not open */ - if (!pd || !pd->port_cnt) - continue; - - /* Don't report the same point multiple times. */ - if (dd->ipath_flags & IPATH_NODMA_RTAIL) - tl = ipath_read_ureg32(dd, ur_rcvhdrtail, i); - else - tl = ipath_get_rcvhdrtail(pd); - if (tl == pd->port_lastrcvhdrqtail) - continue; - - hd = ipath_read_ureg32(dd, ur_rcvhdrhead, i); - if (hd == (tl + 1) || (!hd && tl == dd->ipath_hdrqlast)) { - pd->port_lastrcvhdrqtail = tl; - pd->port_hdrqfull++; - /* flush hdrqfull so that poll() sees it */ - wmb(); - wake_up_interruptible(&pd->port_wait); - } - } - - return chkerrpkts; -} - -static int handle_errors(struct ipath_devdata *dd, ipath_err_t errs) -{ - char msg[128]; - u64 ignore_this_time = 0; - u64 iserr = 0; - int chkerrpkts = 0, noprint = 0; - unsigned supp_msgs; - int log_idx; - - /* - * don't report errors that are masked, either at init - * (not set in ipath_errormask), or temporarily (set in - * ipath_maskederrs) - */ - errs &= dd->ipath_errormask & ~dd->ipath_maskederrs; - - supp_msgs = handle_frequent_errors(dd, errs, msg, (u32)sizeof msg, - &noprint); - - /* 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); - } else { - u64 mask; - for (log_idx = 0; log_idx < IPATH_EEP_LOG_CNT; ++log_idx) { - mask = dd->ipath_eep_st_masks[log_idx].errs_to_log; - if (errs & mask) - ipath_inc_eeprom_err(dd, log_idx, 1); - } - } - - if (errs & INFINIPATH_E_SDMAERRS) - handle_sdma_errors(dd, errs); - - 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) { - int s_iserr; - /* - * 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; - - dd->ipath_errormask &= ~dd->ipath_maskederrs; - ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, - dd->ipath_errormask); - s_iserr = ipath_decode_err(dd, msg, sizeof msg, - dd->ipath_maskederrs); - - if (dd->ipath_maskederrs & - ~(INFINIPATH_E_RRCVEGRFULL | - INFINIPATH_E_RRCVHDRFULL | INFINIPATH_E_PKTERRS)) - ipath_dev_err(dd, "Temporarily disabling " - "error(s) %llx reporting; too frequent (%s)\n", - (unsigned long long) dd->ipath_maskederrs, - 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. - */ - if (s_iserr) - ipath_dbg("Temporarily disabling reporting " - "too frequent queue full errors (%s)\n", - msg); - else - ipath_cdbg(ERRPKT, - "Temporarily disabling reporting too" - " frequent packet 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); - } - - if (errs & INFINIPATH_E_SENDSPECIALTRIGGER) { - dd->ipath_spectriggerhit++; - ipath_dbg("%lu special trigger hits\n", - dd->ipath_spectriggerhit); - } - - /* likely due to cancel; so suppress message unless verbose */ - if ((errs & (INFINIPATH_E_SPKTLEN | INFINIPATH_E_SPIOARMLAUNCH)) && - time_after(dd->ipath_lastcancel, jiffies)) { - /* armlaunch takes precedence; it often causes both. */ - ipath_cdbg(VERBOSE, - "Suppressed %s error (%llx) after sendbuf cancel\n", - (errs & INFINIPATH_E_SPIOARMLAUNCH) ? - "armlaunch" : "sendpktlen", (unsigned long long)errs); - errs &= ~(INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SPKTLEN); - } - - if (!errs) - return 0; - - if (!noprint) { - ipath_err_t mask; - /* - * The ones we mask off are handled specially below - * or above. Also mask SDMADISABLED by default as it - * is too chatty. - */ - mask = INFINIPATH_E_IBSTATUSCHANGED | - INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL | - INFINIPATH_E_HARDWARE | INFINIPATH_E_SDMADISABLED; - - /* if we're in debug, then don't mask SDMADISABLED msgs */ - if (ipath_debug & __IPATH_DBG) - mask &= ~INFINIPATH_E_SDMADISABLED; - - ipath_decode_err(dd, msg, sizeof msg, errs & ~mask); - } 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; - } - iserr = errs & ~(E_SUM_PKTERRS | INFINIPATH_E_PKTERRS); - - - /* - * 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) - chkerrpkts |= handle_hdrq_full(dd); - if (errs & INFINIPATH_E_RRCVEGRFULL) { - struct ipath_portdata *pd = dd->ipath_pd[0]; - - /* - * 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 (pd->port_head != ipath_get_hdrqtail(pd)) - 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; - - ipath_dbg("Lost link, link now down (%s)\n", - ipath_ibcstatus_str[ipath_read_kreg64(dd, - dd->ipath_kregs->kr_ibcstatus) & 0xf]); - } - if (errs & INFINIPATH_E_IBSTATUSCHANGED) - handle_e_ibstatuschanged(dd, errs); - - 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) { - if (iserr) - 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; -} - -/* - * try to cleanup as much as possible for anything that might have gone - * wrong while in freeze mode, such as pio buffers being written by user - * processes (causing armlaunch), send errors due to going into freeze mode, - * etc., and try to avoid causing extra interrupts while doing so. - * Forcibly update the in-memory pioavail register copies after cleanup - * because the chip won't do it while in freeze mode (the register values - * themselves are kept correct). - * Make sure that we don't lose any important interrupts by using the chip - * feature that says that writing 0 to a bit in *clear that is set in - * *status will cause an interrupt to be generated again (if allowed by - * the *mask value). - */ -void ipath_clear_freeze(struct ipath_devdata *dd) -{ - /* disable error interrupts, to avoid confusion */ - ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, 0ULL); - - /* also disable interrupts; errormask is sometimes overwriten */ - ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL); - - ipath_cancel_sends(dd, 1); - - /* clear the freeze, and be sure chip saw it */ - ipath_write_kreg(dd, dd->ipath_kregs->kr_control, - dd->ipath_control); - ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); - - /* force in-memory update now we are out of freeze */ - ipath_force_pio_avail_update(dd); - - /* - * force new interrupt if any hwerr, error or interrupt bits are - * still set, and clear "safe" send packet errors related to freeze - * and cancelling sends. Re-enable error interrupts before possible - * force of re-interrupt on pending interrupts. - */ - ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, 0ULL); - ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, - E_SPKT_ERRS_IGNORE); - ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, - dd->ipath_errormask); - ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, -1LL); - ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, 0ULL); -} - - -/* this is separate to allow for better optimization of ipath_intr() */ - -static noinline 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_ireg(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 noinline void ipath_bad_regread(struct ipath_devdata *dd) -{ - static int allbits; - - /* separate routine, for better optimization of ipath_intr() */ - - /* - * We print the message and disable interrupts, in hope of - * having a better chance of debugging the problem. - */ - ipath_dev_err(dd, - "Read of interrupt status failed (all bits set)\n"); - if (allbits++) { - /* disable all interrupts, something is very wrong */ - ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, 0ULL); - if (allbits == 2) { - ipath_dev_err(dd, "Still bad interrupt status, " - "unregistering interrupt\n"); - dd->ipath_f_free_irq(dd); - } else if (allbits > 2) { - if ((allbits % 10000) == 0) - printk("."); - } else - ipath_dev_err(dd, "Disabling interrupts, " - "multiple errors\n"); - } -} - -static void handle_layer_pioavail(struct ipath_devdata *dd) -{ - unsigned long flags; - int ret; - - ret = ipath_ib_piobufavail(dd->verbs_dev); - if (ret > 0) - goto set; - - return; -set: - spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); - dd->ipath_sendctrl |= INFINIPATH_S_PIOINTBUFAVAIL; - ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, - dd->ipath_sendctrl); - ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); - spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); -} - -/* - * Handle receive interrupts for user ports; this means a user - * process was waiting for a packet to arrive, and didn't want - * to poll - */ -static void handle_urcv(struct ipath_devdata *dd, u64 istat) -{ - u64 portr; - int i; - int rcvdint = 0; - - /* - * test_and_clear_bit(IPATH_PORT_WAITING_RCV) and - * test_and_clear_bit(IPATH_PORT_WAITING_URG) below - * would both like timely updates of the bits so that - * we don't pass them by unnecessarily. the rmb() - * here ensures that we see them promptly -- the - * corresponding wmb()'s are in ipath_poll_urgent() - * and ipath_poll_next()... - */ - rmb(); - portr = ((istat >> dd->ipath_i_rcvavail_shift) & - dd->ipath_i_rcvavail_mask) | - ((istat >> dd->ipath_i_rcvurg_shift) & - dd->ipath_i_rcvurg_mask); - for (i = 1; i < dd->ipath_cfgports; i++) { - struct ipath_portdata *pd = dd->ipath_pd[i]; - - if (portr & (1 << i) && pd && pd->port_cnt) { - if (test_and_clear_bit(IPATH_PORT_WAITING_RCV, - &pd->port_flag)) { - clear_bit(i + dd->ipath_r_intravail_shift, - &dd->ipath_rcvctrl); - wake_up_interruptible(&pd->port_wait); - rcvdint = 1; - } else if (test_and_clear_bit(IPATH_PORT_WAITING_URG, - &pd->port_flag)) { - pd->port_urgent++; - wake_up_interruptible(&pd->port_wait); - } - } - } - if (rcvdint) { - /* only want to take one interrupt, so turn off the rcv - * interrupt for all the ports that we set the rcv_waiting - * (but never for kernel port) - */ - ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, - dd->ipath_rcvctrl); - } -} - -irqreturn_t ipath_intr(int irq, void *data) -{ - struct ipath_devdata *dd = data; - u64 istat, chk0rcv = 0; - ipath_err_t estat = 0; - irqreturn_t ret; - static unsigned unexpected = 0; - u64 kportrbits; - - ipath_stats.sps_ints++; - - if (dd->ipath_int_counter != (u32) -1) - dd->ipath_int_counter++; - - if (!(dd->ipath_flags & IPATH_PRESENT)) { - /* - * This return value is not great, but we do not want the - * interrupt core code to remove our interrupt handler - * because we don't appear to be handling an interrupt - * during a chip reset. - */ - return IRQ_HANDLED; - } - - /* - * this needs to be flags&initted, not statusp, so we keep - * taking interrupts even after link goes down, etc. - * Also, we *must* clear the interrupt at some point, or we won't - * take it again, which can be real bad for errors, etc... - */ - - if (!(dd->ipath_flags & IPATH_INITTED)) { - ipath_bad_intr(dd, &unexpected); - ret = IRQ_NONE; - goto bail; - } - - istat = ipath_read_ireg(dd, dd->ipath_kregs->kr_intstatus); - - if (unlikely(!istat)) { - ipath_stats.sps_nullintr++; - ret = IRQ_NONE; /* not our interrupt, or already handled */ - goto bail; - } - if (unlikely(istat == -1)) { - ipath_bad_regread(dd); - /* don't know if it was our interrupt or not */ - ret = IRQ_NONE; - goto bail; - } - - if (unexpected) - unexpected = 0; - - if (unlikely(istat & ~dd->ipath_i_bitsextant)) - ipath_dev_err(dd, - "interrupt with unknown interrupts %Lx set\n", - (unsigned long long) - istat & ~dd->ipath_i_bitsextant); - else if (istat & ~INFINIPATH_I_ERROR) /* errors do own printing */ - ipath_cdbg(VERBOSE, "intr stat=0x%Lx\n", - (unsigned long long) istat); - - if (istat & INFINIPATH_I_ERROR) { - ipath_stats.sps_errints++; - estat = ipath_read_kreg64(dd, - dd->ipath_kregs->kr_errorstatus); - if (!estat) - dev_info(&dd->pcidev->dev, "error interrupt (%Lx), " - "but no error bits set!\n", - (unsigned long long) istat); - else if (estat == -1LL) - /* - * should we try clearing all, or hope next read - * works? - */ - ipath_dev_err(dd, "Read of error status failed " - "(all bits set); ignoring\n"); - else - chk0rcv |= handle_errors(dd, estat); - } - - if (istat & INFINIPATH_I_GPIO) { - /* - * GPIO interrupts fall in two broad classes: - * GPIO_2 indicates (on some HT4xx boards) that a packet - * has arrived for Port 0. Checking for this - * is controlled by flag IPATH_GPIO_INTR. - * GPIO_3..5 on IBA6120 Rev2 and IBA6110 Rev4 chips indicate - * errors that we need to count. Checking for this - * is controlled by flag IPATH_GPIO_ERRINTRS. - */ - u32 gpiostatus; - u32 to_clear = 0; - - gpiostatus = ipath_read_kreg32( - dd, dd->ipath_kregs->kr_gpio_status); - /* First the error-counter case. */ - if ((gpiostatus & IPATH_GPIO_ERRINTR_MASK) && - (dd->ipath_flags & IPATH_GPIO_ERRINTRS)) { - /* want to clear the bits we see asserted. */ - to_clear |= (gpiostatus & IPATH_GPIO_ERRINTR_MASK); - - /* - * Count appropriately, clear bits out of our copy, - * as they have been "handled". - */ - if (gpiostatus & (1 << IPATH_GPIO_RXUVL_BIT)) { - ipath_dbg("FlowCtl on UnsupVL\n"); - dd->ipath_rxfc_unsupvl_errs++; - } - if (gpiostatus & (1 << IPATH_GPIO_OVRUN_BIT)) { - ipath_dbg("Overrun Threshold exceeded\n"); - dd->ipath_overrun_thresh_errs++; - } - if (gpiostatus & (1 << IPATH_GPIO_LLI_BIT)) { - ipath_dbg("Local Link Integrity error\n"); - dd->ipath_lli_errs++; - } - gpiostatus &= ~IPATH_GPIO_ERRINTR_MASK; - } - /* Now the Port0 Receive case */ - if ((gpiostatus & (1 << IPATH_GPIO_PORT0_BIT)) && - (dd->ipath_flags & IPATH_GPIO_INTR)) { - /* - * GPIO status bit 2 is set, and we expected it. - * clear it and indicate in p0bits. - * This probably only happens if a Port0 pkt - * arrives at _just_ the wrong time, and we - * handle that by seting chk0rcv; - */ - to_clear |= (1 << IPATH_GPIO_PORT0_BIT); - gpiostatus &= ~(1 << IPATH_GPIO_PORT0_BIT); - chk0rcv = 1; - } - if (gpiostatus) { - /* - * Some unexpected bits remain. If they could have - * caused the interrupt, complain and clear. - * To avoid repetition of this condition, also clear - * the mask. It is almost certainly due to error. - */ - const u32 mask = (u32) dd->ipath_gpio_mask; - - if (mask & gpiostatus) { - ipath_dbg("Unexpected GPIO IRQ bits %x\n", - gpiostatus & mask); - to_clear |= (gpiostatus & mask); - dd->ipath_gpio_mask &= ~(gpiostatus & mask); - ipath_write_kreg(dd, - dd->ipath_kregs->kr_gpio_mask, - dd->ipath_gpio_mask); - } - } - if (to_clear) { - ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_clear, - (u64) to_clear); - } - } - - /* - * Clear the interrupt bits we found set, unless they are receive - * related, in which case we already cleared them above, and don't - * want to clear them again, because we might lose an interrupt. - * Clear it early, so we "know" know the chip will have seen this by - * the time we process the queue, and will re-interrupt if necessary. - * The processor itself won't take the interrupt again until we return. - */ - ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, istat); - - /* - * Handle kernel receive queues before checking for pio buffers - * available since receives can overflow; piobuf waiters can afford - * a few extra cycles, since they were waiting anyway, and user's - * waiting for receive are at the bottom. - */ - kportrbits = (1ULL << dd->ipath_i_rcvavail_shift) | - (1ULL << dd->ipath_i_rcvurg_shift); - if (chk0rcv || (istat & kportrbits)) { - istat &= ~kportrbits; - ipath_kreceive(dd->ipath_pd[0]); - } - - if (istat & ((dd->ipath_i_rcvavail_mask << dd->ipath_i_rcvavail_shift) | - (dd->ipath_i_rcvurg_mask << dd->ipath_i_rcvurg_shift))) - handle_urcv(dd, istat); - - if (istat & (INFINIPATH_I_SDMAINT | INFINIPATH_I_SDMADISABLED)) - handle_sdma_intr(dd, istat); - - if (istat & INFINIPATH_I_SPIOBUFAVAIL) { - unsigned long flags; - - spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); - dd->ipath_sendctrl &= ~INFINIPATH_S_PIOINTBUFAVAIL; - ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, - dd->ipath_sendctrl); - ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); - spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); - - /* always process; sdma verbs uses PIO for acks and VL15 */ - handle_layer_pioavail(dd); - } - - ret = IRQ_HANDLED; - -bail: - return ret; -} |