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
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
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.
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
24 * - Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * - Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in
28 * the documentation and/or other materials provided with the
30 * - Neither the name of Intel Corporation nor the names of its
31 * contributors may be used to endorse or promote products derived
32 * from this software without specific prior written permission.
34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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_vau(dd
, dd
->vau
);
134 set_up_vl15(dd
, dd
->vl15_init
);
135 assign_remote_cm_au_table(dd
, dd
->vcu
);
139 read_csr(dd
, DC_DC8051_STS_REMOTE_GUID
);
141 read_csr(dd
, DC_DC8051_STS_REMOTE_NODE_TYPE
) &
142 DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK
;
143 ppd
->neighbor_port_number
=
144 read_csr(dd
, DC_DC8051_STS_REMOTE_PORT_NO
) &
145 DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK
;
146 ppd
->neighbor_fm_security
=
147 read_csr(dd
, DC_DC8051_STS_REMOTE_FM_SECURITY
) &
148 DC_DC8051_STS_LOCAL_FM_SECURITY_DISABLED_MASK
;
150 "Neighbor Guid %llx, Type %d, Port Num %d\n",
151 ppd
->neighbor_guid
, ppd
->neighbor_type
,
152 ppd
->neighbor_port_number
);
154 /* physical link went up */
156 ppd
->offline_disabled_reason
=
157 HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE
);
159 /* link widths are not available until the link is fully up */
160 get_linkup_link_widths(ppd
);
163 /* physical link went down */
166 /* clear HW details of the previous connection */
167 reset_link_credits(dd
);
169 /* freeze after a link down to guarantee a clean egress */
170 start_freeze_handling(ppd
, FREEZE_SELF
| FREEZE_LINK_DOWN
);
172 ev
= IB_EVENT_PORT_ERR
;
174 hfi1_set_uevent_bits(ppd
, _HFI1_EVENT_LINKDOWN_BIT
);
176 /* if we are down, the neighbor is down */
177 ppd
->neighbor_normal
= 0;
179 /* notify IB of the link change */
180 signal_ib_event(ppd
, ev
);
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.
188 void handle_user_interrupt(struct hfi1_ctxtdata
*rcd
)
190 struct hfi1_devdata
*dd
= rcd
->dd
;
193 spin_lock_irqsave(&dd
->uctxt_lock
, flags
);
194 if (bitmap_empty(rcd
->in_use_ctxts
, HFI1_MAX_SHARED_CTXTS
))
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
)) {
203 wake_up_interruptible(&rcd
->wait
);
206 spin_unlock_irqrestore(&dd
->uctxt_lock
, flags
);