2 * Copyright(c) 2015, 2016 Intel Corporation.
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
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48 #include <linux/pci.h>
49 #include <linux/delay.h>
50 #include <linux/bitmap.h>
57 * format_hwmsg - format a single hwerror message
59 * @msgl length of message buffer
60 * @hwmsg message to add to message buffer
62 static void format_hwmsg(char *msg, size_t msgl, const char *hwmsg)
64 strlcat(msg, "[", msgl);
65 strlcat(msg, hwmsg, msgl);
66 strlcat(msg, "]", msgl);
70 * hfi1_format_hwerrors - format hardware error messages for display
71 * @hwerrs hardware errors bit vector
72 * @hwerrmsgs hardware error descriptions
73 * @nhwerrmsgs number of hwerrmsgs
75 * @msgl message buffer length
77 void hfi1_format_hwerrors(u64 hwerrs, const struct hfi1_hwerror_msgs *hwerrmsgs,
78 size_t nhwerrmsgs, char *msg, size_t msgl)
82 for (i = 0; i < nhwerrmsgs; i++)
83 if (hwerrs & hwerrmsgs[i].mask)
84 format_hwmsg(msg, msgl, hwerrmsgs[i].msg);
87 static void signal_ib_event(struct hfi1_pportdata *ppd, enum ib_event_type ev)
89 struct ib_event event;
90 struct hfi1_devdata *dd = ppd->dd;
93 * Only call ib_dispatch_event() if the IB device has been
94 * registered. HFI1_INITED is set iff the driver has successfully
95 * registered with the IB core.
97 if (!(dd->flags & HFI1_INITTED))
99 event.device = &dd->verbs_dev.rdi.ibdev;
100 event.element.port_num = ppd->port;
102 ib_dispatch_event(&event);
106 * Handle a linkup or link down notification.
107 * This is called outside an interrupt.
109 void handle_linkup_change(struct hfi1_devdata *dd, u32 linkup)
111 struct hfi1_pportdata *ppd = &dd->pport[0];
112 enum ib_event_type ev;
114 if (!(ppd->linkup ^ !!linkup))
115 return; /* no change, nothing to do */
119 * Quick linkup and all link up on the simulator does not
120 * trigger or implement:
121 * - VerifyCap interrupt
123 * But rather moves directly to LinkUp.
125 * Do the work of the VerifyCap interrupt handler,
126 * handle_verify_cap(), but do not try moving the state to
127 * LinkUp as we are already there.
129 * NOTE: This uses this device's vAU, vCU, and vl15_init for
130 * the remote values. Both sides must be using the values.
132 if (quick_linkup || dd->icode == ICODE_FUNCTIONAL_SIMULATOR) {
133 set_up_vl15(dd, dd->vau, dd->vl15_init);
134 assign_remote_cm_au_table(dd, dd->vcu);
138 read_csr(dd, DC_DC8051_STS_REMOTE_GUID);
140 read_csr(dd, DC_DC8051_STS_REMOTE_NODE_TYPE) &
141 DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK;
142 ppd->neighbor_port_number =
143 read_csr(dd, DC_DC8051_STS_REMOTE_PORT_NO) &
144 DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK;
145 ppd->neighbor_fm_security =
146 read_csr(dd, DC_DC8051_STS_REMOTE_FM_SECURITY) &
147 DC_DC8051_STS_LOCAL_FM_SECURITY_DISABLED_MASK;
149 "Neighbor Guid %llx, Type %d, Port Num %d\n",
150 ppd->neighbor_guid, ppd->neighbor_type,
151 ppd->neighbor_port_number);
153 /* physical link went up */
155 ppd->offline_disabled_reason =
156 HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE);
158 /* link widths are not available until the link is fully up */
159 get_linkup_link_widths(ppd);
162 /* physical link went down */
165 /* clear HW details of the previous connection */
166 reset_link_credits(dd);
168 /* freeze after a link down to guarantee a clean egress */
169 start_freeze_handling(ppd, FREEZE_SELF | FREEZE_LINK_DOWN);
171 ev = IB_EVENT_PORT_ERR;
173 hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LINKDOWN_BIT);
175 /* if we are down, the neighbor is down */
176 ppd->neighbor_normal = 0;
178 /* notify IB of the link change */
179 signal_ib_event(ppd, ev);
184 * Handle receive or urgent interrupts for user contexts. This means a user
185 * process was waiting for a packet to arrive, and didn't want to poll.
187 void handle_user_interrupt(struct hfi1_ctxtdata *rcd)
189 struct hfi1_devdata *dd = rcd->dd;
192 spin_lock_irqsave(&dd->uctxt_lock, flags);
193 if (bitmap_empty(rcd->in_use_ctxts, HFI1_MAX_SHARED_CTXTS))
196 if (test_and_clear_bit(HFI1_CTXT_WAITING_RCV, &rcd->event_flags)) {
197 wake_up_interruptible(&rcd->wait);
198 hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_DIS, rcd->ctxt);
199 } else if (test_and_clear_bit(HFI1_CTXT_WAITING_URG,
200 &rcd->event_flags)) {
202 wake_up_interruptible(&rcd->wait);
205 spin_unlock_irqrestore(&dd->uctxt_lock, flags);