Mike Marciniszyn | 7724105 | 2015-07-30 15:17:43 -0400 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * This file is provided under a dual BSD/GPLv2 license. When using or |
| 4 | * redistributing this file, you may do so under either license. |
| 5 | * |
| 6 | * GPL LICENSE SUMMARY |
| 7 | * |
| 8 | * Copyright(c) 2015 Intel Corporation. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of version 2 of the GNU General Public License as |
| 12 | * published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * BSD LICENSE |
| 20 | * |
| 21 | * Copyright(c) 2015 Intel Corporation. |
| 22 | * |
| 23 | * Redistribution and use in source and binary forms, with or without |
| 24 | * modification, are permitted provided that the following conditions |
| 25 | * are met: |
| 26 | * |
| 27 | * - Redistributions of source code must retain the above copyright |
| 28 | * notice, this list of conditions and the following disclaimer. |
| 29 | * - Redistributions in binary form must reproduce the above copyright |
| 30 | * notice, this list of conditions and the following disclaimer in |
| 31 | * the documentation and/or other materials provided with the |
| 32 | * distribution. |
| 33 | * - Neither the name of Intel Corporation nor the names of its |
| 34 | * contributors may be used to endorse or promote products derived |
| 35 | * from this software without specific prior written permission. |
| 36 | * |
| 37 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 38 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 39 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 40 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 41 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 42 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 43 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 44 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 45 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 46 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 47 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 48 | * |
| 49 | */ |
| 50 | |
| 51 | #include <linux/pci.h> |
| 52 | #include <linux/delay.h> |
| 53 | |
| 54 | #include "hfi.h" |
| 55 | #include "common.h" |
| 56 | #include "sdma.h" |
| 57 | |
| 58 | /** |
| 59 | * format_hwmsg - format a single hwerror message |
| 60 | * @msg message buffer |
| 61 | * @msgl length of message buffer |
| 62 | * @hwmsg message to add to message buffer |
| 63 | */ |
| 64 | static void format_hwmsg(char *msg, size_t msgl, const char *hwmsg) |
| 65 | { |
| 66 | strlcat(msg, "[", msgl); |
| 67 | strlcat(msg, hwmsg, msgl); |
| 68 | strlcat(msg, "]", msgl); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * hfi1_format_hwerrors - format hardware error messages for display |
| 73 | * @hwerrs hardware errors bit vector |
| 74 | * @hwerrmsgs hardware error descriptions |
| 75 | * @nhwerrmsgs number of hwerrmsgs |
| 76 | * @msg message buffer |
| 77 | * @msgl message buffer length |
| 78 | */ |
| 79 | void hfi1_format_hwerrors(u64 hwerrs, const struct hfi1_hwerror_msgs *hwerrmsgs, |
| 80 | size_t nhwerrmsgs, char *msg, size_t msgl) |
| 81 | { |
| 82 | int i; |
| 83 | |
| 84 | for (i = 0; i < nhwerrmsgs; i++) |
| 85 | if (hwerrs & hwerrmsgs[i].mask) |
| 86 | format_hwmsg(msg, msgl, hwerrmsgs[i].msg); |
| 87 | } |
| 88 | |
| 89 | static void signal_ib_event(struct hfi1_pportdata *ppd, enum ib_event_type ev) |
| 90 | { |
| 91 | struct ib_event event; |
| 92 | struct hfi1_devdata *dd = ppd->dd; |
| 93 | |
| 94 | /* |
| 95 | * Only call ib_dispatch_event() if the IB device has been |
| 96 | * registered. HFI1_INITED is set iff the driver has successfully |
| 97 | * registered with the IB core. |
| 98 | */ |
| 99 | if (!(dd->flags & HFI1_INITTED)) |
| 100 | return; |
Dennis Dalessandro | ec3f2c1 | 2016-01-19 14:41:33 -0800 | [diff] [blame] | 101 | event.device = &dd->verbs_dev.rdi.ibdev; |
Mike Marciniszyn | 7724105 | 2015-07-30 15:17:43 -0400 | [diff] [blame] | 102 | event.element.port_num = ppd->port; |
| 103 | event.event = ev; |
| 104 | ib_dispatch_event(&event); |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * Handle a linkup or link down notification. |
| 109 | * This is called outside an interrupt. |
| 110 | */ |
| 111 | void handle_linkup_change(struct hfi1_devdata *dd, u32 linkup) |
| 112 | { |
| 113 | struct hfi1_pportdata *ppd = &dd->pport[0]; |
| 114 | enum ib_event_type ev; |
| 115 | |
| 116 | if (!(ppd->linkup ^ !!linkup)) |
| 117 | return; /* no change, nothing to do */ |
| 118 | |
| 119 | if (linkup) { |
| 120 | /* |
| 121 | * Quick linkup and all link up on the simulator does not |
| 122 | * trigger or implement: |
| 123 | * - VerifyCap interrupt |
| 124 | * - VerifyCap frames |
| 125 | * But rather moves directly to LinkUp. |
| 126 | * |
| 127 | * Do the work of the VerifyCap interrupt handler, |
| 128 | * handle_verify_cap(), but do not try moving the state to |
| 129 | * LinkUp as we are already there. |
| 130 | * |
| 131 | * NOTE: This uses this device's vAU, vCU, and vl15_init for |
| 132 | * the remote values. Both sides must be using the values. |
| 133 | */ |
| 134 | if (quick_linkup |
| 135 | || dd->icode == ICODE_FUNCTIONAL_SIMULATOR) { |
| 136 | set_up_vl15(dd, dd->vau, dd->vl15_init); |
| 137 | assign_remote_cm_au_table(dd, dd->vcu); |
| 138 | ppd->neighbor_guid = |
| 139 | read_csr(dd, |
| 140 | DC_DC8051_STS_REMOTE_GUID); |
| 141 | ppd->neighbor_type = |
| 142 | read_csr(dd, DC_DC8051_STS_REMOTE_NODE_TYPE) & |
| 143 | DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK; |
| 144 | ppd->neighbor_port_number = |
| 145 | read_csr(dd, DC_DC8051_STS_REMOTE_PORT_NO) & |
| 146 | DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK; |
| 147 | dd_dev_info(dd, |
| 148 | "Neighbor GUID: %llx Neighbor type %d\n", |
| 149 | ppd->neighbor_guid, |
| 150 | ppd->neighbor_type); |
| 151 | } |
| 152 | |
| 153 | /* physical link went up */ |
| 154 | ppd->linkup = 1; |
| 155 | ppd->offline_disabled_reason = OPA_LINKDOWN_REASON_NONE; |
| 156 | |
| 157 | /* link widths are not available until the link is fully up */ |
| 158 | get_linkup_link_widths(ppd); |
| 159 | |
| 160 | } else { |
| 161 | /* physical link went down */ |
| 162 | ppd->linkup = 0; |
| 163 | |
| 164 | /* clear HW details of the previous connection */ |
| 165 | reset_link_credits(dd); |
| 166 | |
| 167 | /* freeze after a link down to guarantee a clean egress */ |
| 168 | start_freeze_handling(ppd, FREEZE_SELF|FREEZE_LINK_DOWN); |
| 169 | |
| 170 | ev = IB_EVENT_PORT_ERR; |
| 171 | |
| 172 | hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LINKDOWN_BIT); |
| 173 | |
| 174 | /* if we are down, the neighbor is down */ |
| 175 | ppd->neighbor_normal = 0; |
| 176 | |
| 177 | /* notify IB of the link change */ |
| 178 | signal_ib_event(ppd, ev); |
| 179 | } |
| 180 | |
| 181 | |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * Handle receive or urgent interrupts for user contexts. This means a user |
| 186 | * process was waiting for a packet to arrive, and didn't want to poll. |
| 187 | */ |
| 188 | void handle_user_interrupt(struct hfi1_ctxtdata *rcd) |
| 189 | { |
| 190 | struct hfi1_devdata *dd = rcd->dd; |
| 191 | unsigned long flags; |
| 192 | |
| 193 | spin_lock_irqsave(&dd->uctxt_lock, flags); |
| 194 | if (!rcd->cnt) |
| 195 | goto done; |
| 196 | |
| 197 | if (test_and_clear_bit(HFI1_CTXT_WAITING_RCV, &rcd->event_flags)) { |
| 198 | wake_up_interruptible(&rcd->wait); |
| 199 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_DIS, rcd->ctxt); |
| 200 | } else if (test_and_clear_bit(HFI1_CTXT_WAITING_URG, |
| 201 | &rcd->event_flags)) { |
| 202 | rcd->urgent++; |
| 203 | wake_up_interruptible(&rcd->wait); |
| 204 | } |
| 205 | done: |
| 206 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); |
| 207 | } |