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
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48 #include <linux/pci.h>
49 #include <linux/delay.h>
56 * format_hwmsg - format a single hwerror message
58 * @msgl length of message buffer
59 * @hwmsg message to add to message buffer
61 static void format_hwmsg(char *msg, size_t msgl, const char *hwmsg)
63 strlcat(msg, "[", msgl);
64 strlcat(msg, hwmsg, msgl);
65 strlcat(msg, "]", msgl);
69 * hfi1_format_hwerrors - format hardware error messages for display
70 * @hwerrs hardware errors bit vector
71 * @hwerrmsgs hardware error descriptions
72 * @nhwerrmsgs number of hwerrmsgs
74 * @msgl message buffer length
76 void hfi1_format_hwerrors(u64 hwerrs, const struct hfi1_hwerror_msgs *hwerrmsgs,
77 size_t nhwerrmsgs, char *msg, size_t msgl)
81 for (i = 0; i < nhwerrmsgs; i++)
82 if (hwerrs & hwerrmsgs[i].mask)
83 format_hwmsg(msg, msgl, hwerrmsgs[i].msg);
86 static void signal_ib_event(struct hfi1_pportdata *ppd, enum ib_event_type ev)
88 struct ib_event event;
89 struct hfi1_devdata *dd = ppd->dd;
92 * Only call ib_dispatch_event() if the IB device has been
93 * registered. HFI1_INITED is set iff the driver has successfully
94 * registered with the IB core.
96 if (!(dd->flags & HFI1_INITTED))
98 event.device = &dd->verbs_dev.rdi.ibdev;
99 event.element.port_num = ppd->port;
101 ib_dispatch_event(&event);
105 * Handle a linkup or link down notification.
106 * This is called outside an interrupt.
108 void handle_linkup_change(struct hfi1_devdata *dd, u32 linkup)
110 struct hfi1_pportdata *ppd = &dd->pport[0];
111 enum ib_event_type ev;
113 if (!(ppd->linkup ^ !!linkup))
114 return; /* no change, nothing to do */
118 * Quick linkup and all link up on the simulator does not
119 * trigger or implement:
120 * - VerifyCap interrupt
122 * But rather moves directly to LinkUp.
124 * Do the work of the VerifyCap interrupt handler,
125 * handle_verify_cap(), but do not try moving the state to
126 * LinkUp as we are already there.
128 * NOTE: This uses this device's vAU, vCU, and vl15_init for
129 * the remote values. Both sides must be using the values.
131 if (quick_linkup || dd->icode == ICODE_FUNCTIONAL_SIMULATOR) {
132 set_up_vl15(dd, dd->vau, dd->vl15_init);
133 assign_remote_cm_au_table(dd, dd->vcu);
135 read_csr(dd, DC_DC8051_STS_REMOTE_GUID);
137 read_csr(dd, DC_DC8051_STS_REMOTE_NODE_TYPE) &
138 DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK;
139 ppd->neighbor_port_number =
140 read_csr(dd, DC_DC8051_STS_REMOTE_PORT_NO) &
141 DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK;
142 dd_dev_info(dd, "Neighbor GUID: %llx Neighbor type %d\n",
147 /* physical link went up */
149 ppd->offline_disabled_reason =
150 HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE);
152 /* link widths are not available until the link is fully up */
153 get_linkup_link_widths(ppd);
156 /* physical link went down */
159 /* clear HW details of the previous connection */
160 reset_link_credits(dd);
162 /* freeze after a link down to guarantee a clean egress */
163 start_freeze_handling(ppd, FREEZE_SELF | FREEZE_LINK_DOWN);
165 ev = IB_EVENT_PORT_ERR;
167 hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LINKDOWN_BIT);
169 /* if we are down, the neighbor is down */
170 ppd->neighbor_normal = 0;
172 /* notify IB of the link change */
173 signal_ib_event(ppd, ev);
178 * Handle receive or urgent interrupts for user contexts. This means a user
179 * process was waiting for a packet to arrive, and didn't want to poll.
181 void handle_user_interrupt(struct hfi1_ctxtdata *rcd)
183 struct hfi1_devdata *dd = rcd->dd;
186 spin_lock_irqsave(&dd->uctxt_lock, flags);
190 if (test_and_clear_bit(HFI1_CTXT_WAITING_RCV, &rcd->event_flags)) {
191 wake_up_interruptible(&rcd->wait);
192 hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_DIS, rcd->ctxt);
193 } else if (test_and_clear_bit(HFI1_CTXT_WAITING_URG,
194 &rcd->event_flags)) {
196 wake_up_interruptible(&rcd->wait);
199 spin_unlock_irqrestore(&dd->uctxt_lock, flags);