1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/types.h>
30 #include <sys/bus.h>
31 #include <sys/malloc.h>
32 #include <sys/sysctl.h>
33
34 #include <opencrypto/xform.h>
35
36 #include "ccp.h"
37 #include "ccp_lsb.h"
38
39 void
ccp_queue_decode_lsb_regions(struct ccp_softc * sc,uint64_t lsbmask,unsigned queue)40 ccp_queue_decode_lsb_regions(struct ccp_softc *sc, uint64_t lsbmask,
41 unsigned queue)
42 {
43 struct ccp_queue *qp;
44 unsigned i;
45
46 qp = &sc->queues[queue];
47
48 qp->lsb_mask = 0;
49
50 for (i = 0; i < MAX_LSB_REGIONS; i++) {
51 if (((1 << queue) & lsbmask) != 0)
52 qp->lsb_mask |= (1 << i);
53 lsbmask >>= MAX_HW_QUEUES;
54 }
55
56 /*
57 * Ignore region 0, which has special entries that cannot be used
58 * generally.
59 */
60 qp->lsb_mask &= ~(1 << 0);
61 }
62
63 /*
64 * Look for a private LSB for each queue. There are 7 general purpose LSBs
65 * total and 5 queues. PSP will reserve some of both. Firmware limits some
66 * queues' access to some LSBs; we hope it is fairly sane and just use a dumb
67 * greedy algorithm to assign LSBs to queues.
68 */
69 void
ccp_assign_lsb_regions(struct ccp_softc * sc,uint64_t lsbmask)70 ccp_assign_lsb_regions(struct ccp_softc *sc, uint64_t lsbmask)
71 {
72 unsigned q, i;
73
74 for (q = 0; q < nitems(sc->queues); q++) {
75 if (((1 << q) & sc->valid_queues) == 0)
76 continue;
77
78 sc->queues[q].private_lsb = -1;
79
80 /* Intentionally skip specialized 0th LSB */
81 for (i = 1; i < MAX_LSB_REGIONS; i++) {
82 if ((lsbmask &
83 (1ull << (q + (MAX_HW_QUEUES * i)))) != 0) {
84 sc->queues[q].private_lsb = i;
85 lsbmask &= ~(0x1Full << (MAX_HW_QUEUES * i));
86 break;
87 }
88 }
89
90 if (i == MAX_LSB_REGIONS) {
91 device_printf(sc->dev,
92 "Ignoring queue %u with no private LSB\n", q);
93 sc->valid_queues &= ~(1 << q);
94 }
95 }
96 }
97