From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Marciniszyn Subject: [PATCH v2 20/49] IB/hfi1: add interrupt hooks Date: Mon, 15 Jun 2015 09:27:46 -0400 Message-ID: <20150615132746.29741.65536.stgit@phlsvslse11.ph.intel.com> References: <20150615132434.29741.35258.stgit@phlsvslse11.ph.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20150615132434.29741.35258.stgit-K+u1se/DcYrLESAwzcoQNrvm/XP+8Wra@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org Signed-off-by: Andrew Friedley Signed-off-by: Arthur Kepner Signed-off-by: Brendan Cunningham Signed-off-by: Brian Welty Signed-off-by: Caz Yokoyama Signed-off-by: Dean Luick Signed-off-by: Dennis Dalessandro Signed-off-by: Easwar Hariharan Signed-off-by: Harish Chegondi Signed-off-by: Ira Weiny Signed-off-by: Jim Snow Signed-off-by: John Gregor Signed-off-by: Jubin John Signed-off-by: Kaike Wan Signed-off-by: Kevin Pine Signed-off-by: Kyle Liddell Signed-off-by: Mike Marciniszyn Signed-off-by: Mitko Haralanov Signed-off-by: Ravi Krishnaswamy Signed-off-by: Sadanand Warrier Signed-off-by: Sanath Kumar Signed-off-by: Sudeep Dutt Signed-off-by: Vlad Danushevsky --- drivers/infiniband/hw/hfi1/intr.c | 204 +++++++++++++++++++++++++++++++++++++ 1 file changed, 204 insertions(+) create mode 100644 drivers/infiniband/hw/hfi1/intr.c diff --git a/drivers/infiniband/hw/hfi1/intr.c b/drivers/infiniband/hw/hfi1/intr.c new file mode 100644 index 0000000..4780b89 --- /dev/null +++ b/drivers/infiniband/hw/hfi1/intr.c @@ -0,0 +1,204 @@ +/* + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2015 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * BSD LICENSE + * + * Copyright(c) 2015 Intel Corporation. + * + * 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. + * - Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include +#include + +#include "hfi.h" +#include "common.h" +#include "sdma.h" + +/** + * format_hwmsg - format a single hwerror message + * @msg message buffer + * @msgl length of message buffer + * @hwmsg message to add to message buffer + */ +static void format_hwmsg(char *msg, size_t msgl, const char *hwmsg) +{ + strlcat(msg, "[", msgl); + strlcat(msg, hwmsg, msgl); + strlcat(msg, "]", msgl); +} + +/** + * hfi1_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 hfi1_format_hwerrors(u64 hwerrs, const struct hfi1_hwerror_msgs *hwerrmsgs, + size_t nhwerrmsgs, char *msg, size_t msgl) +{ + int i; + + for (i = 0; i < nhwerrmsgs; i++) + if (hwerrs & hwerrmsgs[i].mask) + format_hwmsg(msg, msgl, hwerrmsgs[i].msg); +} + +static void signal_ib_event(struct hfi1_pportdata *ppd, enum ib_event_type ev) +{ + struct ib_event event; + struct hfi1_devdata *dd = ppd->dd; + + /* + * Only call ib_dispatch_event() if the IB device has been + * registered. HFI1_INITED is set iff the driver has successfully + * registered with the IB core. + */ + if (!(dd->flags & HFI1_INITTED)) + return; + event.device = &dd->verbs_dev.ibdev; + event.element.port_num = ppd->port; + event.event = ev; + ib_dispatch_event(&event); +} + +/* + * Handle a linkup or link down notification. + * This is called outside an interrupt. + */ +void handle_linkup_change(struct hfi1_devdata *dd, u32 linkup) +{ + struct hfi1_pportdata *ppd = &dd->pport[0]; + enum ib_event_type ev; + + if (!(ppd->linkup ^ !!linkup)) + return; /* no change, nothing to do */ + + if (linkup) { + /* + * Quick linkup and all link up on the simulator does not + * trigger or implement: + * - VerifyCap interrupt + * - VerifyCap frames + * But rather moves directly to LinkUp. + * + * Do the work of the VerifyCap interrupt handler, + * handle_verify_cap(), but do not try moving the state to + * LinkUp as we are already there. + * + * NOTE: This uses this device's vAU, vCU, and vl15_init for + * the remote values. Both sides must be using the values. + */ + if (quick_linkup + || dd->icode == ICODE_FUNCTIONAL_SIMULATOR) { + set_up_vl15(dd, dd->vau, dd->vl15_init); + assign_remote_cm_au_table(dd, dd->vcu); + ppd->neighbor_guid = + cpu_to_be64(read_csr(dd, + DC_DC8051_STS_REMOTE_GUID)); + ppd->neighbor_type = + read_csr(dd, DC_DC8051_STS_REMOTE_NODE_TYPE) & + DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK; + dd_dev_info(dd, + "Neighbor GUID: %llx Neighbor type %d\n", + be64_to_cpu(ppd->neighbor_guid), + ppd->neighbor_type); + } + + /* physical link went up */ + ppd->linkup = 1; + ppd->offline_disabled_reason = OPA_LINKDOWN_REASON_NONE; + + /* link widths are not available until the link is fully up */ + get_linkup_link_widths(ppd); + + } else { + /* physical link went down */ + ppd->linkup = 0; + + /* clear HW details of the previous connection */ + reset_link_credits(dd); + + /* freeze after a link down to guarantee a clean egress */ + start_freeze_handling(ppd, FREEZE_SELF|FREEZE_LINK_DOWN); + + ev = IB_EVENT_PORT_ERR; + + hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LINKDOWN_BIT); + + /* if we are down, the neighbor is down */ + ppd->neighbor_normal = 0; + + /* notify IB of the link change */ + signal_ib_event(ppd, ev); + } + + +} + +/* + * Handle receive or urgent interrupts for user contexts. This means a user + * process was waiting for a packet to arrive, and didn't want to poll. + */ +void handle_user_interrupt(struct hfi1_ctxtdata *rcd) +{ + struct hfi1_devdata *dd = rcd->dd; + unsigned long flags; + + spin_lock_irqsave(&dd->uctxt_lock, flags); + if (!rcd->cnt) + goto done; + + if (test_and_clear_bit(HFI1_CTXT_WAITING_RCV, &rcd->event_flags)) { + wake_up_interruptible(&rcd->wait); + hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_DIS, rcd->ctxt); + } else if (test_and_clear_bit(HFI1_CTXT_WAITING_URG, + &rcd->event_flags)) { + rcd->urgent++; + wake_up_interruptible(&rcd->wait); + } +done: + spin_unlock_irqrestore(&dd->uctxt_lock, flags); +} -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html