1f48ad614SDennis Dalessandro /* 2f48ad614SDennis Dalessandro * Copyright(c) 2015, 2016 Intel Corporation. 3f48ad614SDennis Dalessandro * 4f48ad614SDennis Dalessandro * This file is provided under a dual BSD/GPLv2 license. When using or 5f48ad614SDennis Dalessandro * redistributing this file, you may do so under either license. 6f48ad614SDennis Dalessandro * 7f48ad614SDennis Dalessandro * GPL LICENSE SUMMARY 8f48ad614SDennis Dalessandro * 9f48ad614SDennis Dalessandro * This program is free software; you can redistribute it and/or modify 10f48ad614SDennis Dalessandro * it under the terms of version 2 of the GNU General Public License as 11f48ad614SDennis Dalessandro * published by the Free Software Foundation. 12f48ad614SDennis Dalessandro * 13f48ad614SDennis Dalessandro * This program is distributed in the hope that it will be useful, but 14f48ad614SDennis Dalessandro * WITHOUT ANY WARRANTY; without even the implied warranty of 15f48ad614SDennis Dalessandro * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16f48ad614SDennis Dalessandro * General Public License for more details. 17f48ad614SDennis Dalessandro * 18f48ad614SDennis Dalessandro * BSD LICENSE 19f48ad614SDennis Dalessandro * 20f48ad614SDennis Dalessandro * Redistribution and use in source and binary forms, with or without 21f48ad614SDennis Dalessandro * modification, are permitted provided that the following conditions 22f48ad614SDennis Dalessandro * are met: 23f48ad614SDennis Dalessandro * 24f48ad614SDennis Dalessandro * - Redistributions of source code must retain the above copyright 25f48ad614SDennis Dalessandro * notice, this list of conditions and the following disclaimer. 26f48ad614SDennis Dalessandro * - Redistributions in binary form must reproduce the above copyright 27f48ad614SDennis Dalessandro * notice, this list of conditions and the following disclaimer in 28f48ad614SDennis Dalessandro * the documentation and/or other materials provided with the 29f48ad614SDennis Dalessandro * distribution. 30f48ad614SDennis Dalessandro * - Neither the name of Intel Corporation nor the names of its 31f48ad614SDennis Dalessandro * contributors may be used to endorse or promote products derived 32f48ad614SDennis Dalessandro * from this software without specific prior written permission. 33f48ad614SDennis Dalessandro * 34f48ad614SDennis Dalessandro * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 35f48ad614SDennis Dalessandro * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 36f48ad614SDennis Dalessandro * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 37f48ad614SDennis Dalessandro * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 38f48ad614SDennis Dalessandro * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 39f48ad614SDennis Dalessandro * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 40f48ad614SDennis Dalessandro * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 41f48ad614SDennis Dalessandro * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 42f48ad614SDennis Dalessandro * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 43f48ad614SDennis Dalessandro * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 44f48ad614SDennis Dalessandro * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 45f48ad614SDennis Dalessandro * 46f48ad614SDennis Dalessandro */ 47f48ad614SDennis Dalessandro 48f48ad614SDennis Dalessandro #include <linux/pci.h> 49f48ad614SDennis Dalessandro #include <linux/delay.h> 50f48ad614SDennis Dalessandro 51f48ad614SDennis Dalessandro #include "hfi.h" 52f48ad614SDennis Dalessandro #include "common.h" 53f48ad614SDennis Dalessandro #include "sdma.h" 54f48ad614SDennis Dalessandro 55f48ad614SDennis Dalessandro /** 56f48ad614SDennis Dalessandro * format_hwmsg - format a single hwerror message 57f48ad614SDennis Dalessandro * @msg message buffer 58f48ad614SDennis Dalessandro * @msgl length of message buffer 59f48ad614SDennis Dalessandro * @hwmsg message to add to message buffer 60f48ad614SDennis Dalessandro */ 61f48ad614SDennis Dalessandro static void format_hwmsg(char *msg, size_t msgl, const char *hwmsg) 62f48ad614SDennis Dalessandro { 63f48ad614SDennis Dalessandro strlcat(msg, "[", msgl); 64f48ad614SDennis Dalessandro strlcat(msg, hwmsg, msgl); 65f48ad614SDennis Dalessandro strlcat(msg, "]", msgl); 66f48ad614SDennis Dalessandro } 67f48ad614SDennis Dalessandro 68f48ad614SDennis Dalessandro /** 69f48ad614SDennis Dalessandro * hfi1_format_hwerrors - format hardware error messages for display 70f48ad614SDennis Dalessandro * @hwerrs hardware errors bit vector 71f48ad614SDennis Dalessandro * @hwerrmsgs hardware error descriptions 72f48ad614SDennis Dalessandro * @nhwerrmsgs number of hwerrmsgs 73f48ad614SDennis Dalessandro * @msg message buffer 74f48ad614SDennis Dalessandro * @msgl message buffer length 75f48ad614SDennis Dalessandro */ 76f48ad614SDennis Dalessandro void hfi1_format_hwerrors(u64 hwerrs, const struct hfi1_hwerror_msgs *hwerrmsgs, 77f48ad614SDennis Dalessandro size_t nhwerrmsgs, char *msg, size_t msgl) 78f48ad614SDennis Dalessandro { 79f48ad614SDennis Dalessandro int i; 80f48ad614SDennis Dalessandro 81f48ad614SDennis Dalessandro for (i = 0; i < nhwerrmsgs; i++) 82f48ad614SDennis Dalessandro if (hwerrs & hwerrmsgs[i].mask) 83f48ad614SDennis Dalessandro format_hwmsg(msg, msgl, hwerrmsgs[i].msg); 84f48ad614SDennis Dalessandro } 85f48ad614SDennis Dalessandro 86f48ad614SDennis Dalessandro static void signal_ib_event(struct hfi1_pportdata *ppd, enum ib_event_type ev) 87f48ad614SDennis Dalessandro { 88f48ad614SDennis Dalessandro struct ib_event event; 89f48ad614SDennis Dalessandro struct hfi1_devdata *dd = ppd->dd; 90f48ad614SDennis Dalessandro 91f48ad614SDennis Dalessandro /* 92f48ad614SDennis Dalessandro * Only call ib_dispatch_event() if the IB device has been 93f48ad614SDennis Dalessandro * registered. HFI1_INITED is set iff the driver has successfully 94f48ad614SDennis Dalessandro * registered with the IB core. 95f48ad614SDennis Dalessandro */ 96f48ad614SDennis Dalessandro if (!(dd->flags & HFI1_INITTED)) 97f48ad614SDennis Dalessandro return; 98f48ad614SDennis Dalessandro event.device = &dd->verbs_dev.rdi.ibdev; 99f48ad614SDennis Dalessandro event.element.port_num = ppd->port; 100f48ad614SDennis Dalessandro event.event = ev; 101f48ad614SDennis Dalessandro ib_dispatch_event(&event); 102f48ad614SDennis Dalessandro } 103f48ad614SDennis Dalessandro 104f48ad614SDennis Dalessandro /* 105f48ad614SDennis Dalessandro * Handle a linkup or link down notification. 106f48ad614SDennis Dalessandro * This is called outside an interrupt. 107f48ad614SDennis Dalessandro */ 108f48ad614SDennis Dalessandro void handle_linkup_change(struct hfi1_devdata *dd, u32 linkup) 109f48ad614SDennis Dalessandro { 110f48ad614SDennis Dalessandro struct hfi1_pportdata *ppd = &dd->pport[0]; 111f48ad614SDennis Dalessandro enum ib_event_type ev; 112f48ad614SDennis Dalessandro 113f48ad614SDennis Dalessandro if (!(ppd->linkup ^ !!linkup)) 114f48ad614SDennis Dalessandro return; /* no change, nothing to do */ 115f48ad614SDennis Dalessandro 116f48ad614SDennis Dalessandro if (linkup) { 117f48ad614SDennis Dalessandro /* 118f48ad614SDennis Dalessandro * Quick linkup and all link up on the simulator does not 119f48ad614SDennis Dalessandro * trigger or implement: 120f48ad614SDennis Dalessandro * - VerifyCap interrupt 121f48ad614SDennis Dalessandro * - VerifyCap frames 122f48ad614SDennis Dalessandro * But rather moves directly to LinkUp. 123f48ad614SDennis Dalessandro * 124f48ad614SDennis Dalessandro * Do the work of the VerifyCap interrupt handler, 125f48ad614SDennis Dalessandro * handle_verify_cap(), but do not try moving the state to 126f48ad614SDennis Dalessandro * LinkUp as we are already there. 127f48ad614SDennis Dalessandro * 128f48ad614SDennis Dalessandro * NOTE: This uses this device's vAU, vCU, and vl15_init for 129f48ad614SDennis Dalessandro * the remote values. Both sides must be using the values. 130f48ad614SDennis Dalessandro */ 131f48ad614SDennis Dalessandro if (quick_linkup || dd->icode == ICODE_FUNCTIONAL_SIMULATOR) { 132f48ad614SDennis Dalessandro set_up_vl15(dd, dd->vau, dd->vl15_init); 133f48ad614SDennis Dalessandro assign_remote_cm_au_table(dd, dd->vcu); 13498b9ee20SStuart Summers } 13598b9ee20SStuart Summers 136f48ad614SDennis Dalessandro ppd->neighbor_guid = 137f48ad614SDennis Dalessandro read_csr(dd, DC_DC8051_STS_REMOTE_GUID); 138f48ad614SDennis Dalessandro ppd->neighbor_type = 139f48ad614SDennis Dalessandro read_csr(dd, DC_DC8051_STS_REMOTE_NODE_TYPE) & 140f48ad614SDennis Dalessandro DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK; 141f48ad614SDennis Dalessandro ppd->neighbor_port_number = 142f48ad614SDennis Dalessandro read_csr(dd, DC_DC8051_STS_REMOTE_PORT_NO) & 143f48ad614SDennis Dalessandro DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK; 14498b9ee20SStuart Summers ppd->neighbor_fm_security = 14598b9ee20SStuart Summers read_csr(dd, DC_DC8051_STS_REMOTE_FM_SECURITY) & 14698b9ee20SStuart Summers DC_DC8051_STS_LOCAL_FM_SECURITY_DISABLED_MASK; 14798b9ee20SStuart Summers dd_dev_info(dd, 14898b9ee20SStuart Summers "Neighbor Guid %llx, Type %d, Port Num %d\n", 14998b9ee20SStuart Summers ppd->neighbor_guid, ppd->neighbor_type, 15098b9ee20SStuart Summers ppd->neighbor_port_number); 151f48ad614SDennis Dalessandro 152f48ad614SDennis Dalessandro /* physical link went up */ 153f48ad614SDennis Dalessandro ppd->linkup = 1; 154f48ad614SDennis Dalessandro ppd->offline_disabled_reason = 155f48ad614SDennis Dalessandro HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE); 156f48ad614SDennis Dalessandro 157f48ad614SDennis Dalessandro /* link widths are not available until the link is fully up */ 158f48ad614SDennis Dalessandro get_linkup_link_widths(ppd); 159f48ad614SDennis Dalessandro 160f48ad614SDennis Dalessandro } else { 161f48ad614SDennis Dalessandro /* physical link went down */ 162f48ad614SDennis Dalessandro ppd->linkup = 0; 163f48ad614SDennis Dalessandro 164f48ad614SDennis Dalessandro /* clear HW details of the previous connection */ 165f48ad614SDennis Dalessandro reset_link_credits(dd); 166f48ad614SDennis Dalessandro 167f48ad614SDennis Dalessandro /* freeze after a link down to guarantee a clean egress */ 168f48ad614SDennis Dalessandro start_freeze_handling(ppd, FREEZE_SELF | FREEZE_LINK_DOWN); 169f48ad614SDennis Dalessandro 170f48ad614SDennis Dalessandro ev = IB_EVENT_PORT_ERR; 171f48ad614SDennis Dalessandro 172f48ad614SDennis Dalessandro hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LINKDOWN_BIT); 173f48ad614SDennis Dalessandro 174f48ad614SDennis Dalessandro /* if we are down, the neighbor is down */ 175f48ad614SDennis Dalessandro ppd->neighbor_normal = 0; 176f48ad614SDennis Dalessandro 177f48ad614SDennis Dalessandro /* notify IB of the link change */ 178f48ad614SDennis Dalessandro signal_ib_event(ppd, ev); 179f48ad614SDennis Dalessandro } 180f48ad614SDennis Dalessandro } 181f48ad614SDennis Dalessandro 182f48ad614SDennis Dalessandro /* 183f48ad614SDennis Dalessandro * Handle receive or urgent interrupts for user contexts. This means a user 184f48ad614SDennis Dalessandro * process was waiting for a packet to arrive, and didn't want to poll. 185f48ad614SDennis Dalessandro */ 186f48ad614SDennis Dalessandro void handle_user_interrupt(struct hfi1_ctxtdata *rcd) 187f48ad614SDennis Dalessandro { 188f48ad614SDennis Dalessandro struct hfi1_devdata *dd = rcd->dd; 189f48ad614SDennis Dalessandro unsigned long flags; 190f48ad614SDennis Dalessandro 191f48ad614SDennis Dalessandro spin_lock_irqsave(&dd->uctxt_lock, flags); 192f48ad614SDennis Dalessandro if (!rcd->cnt) 193f48ad614SDennis Dalessandro goto done; 194f48ad614SDennis Dalessandro 195f48ad614SDennis Dalessandro if (test_and_clear_bit(HFI1_CTXT_WAITING_RCV, &rcd->event_flags)) { 196f48ad614SDennis Dalessandro wake_up_interruptible(&rcd->wait); 197f48ad614SDennis Dalessandro hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_DIS, rcd->ctxt); 198f48ad614SDennis Dalessandro } else if (test_and_clear_bit(HFI1_CTXT_WAITING_URG, 199f48ad614SDennis Dalessandro &rcd->event_flags)) { 200f48ad614SDennis Dalessandro rcd->urgent++; 201f48ad614SDennis Dalessandro wake_up_interruptible(&rcd->wait); 202f48ad614SDennis Dalessandro } 203f48ad614SDennis Dalessandro done: 204f48ad614SDennis Dalessandro spin_unlock_irqrestore(&dd->uctxt_lock, flags); 205f48ad614SDennis Dalessandro } 206