1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2020 Ruslan Bukin <br@bsdpad.com>
5 *
6 * This work was supported by Innovate UK project 105694, "Digital Security
7 * by Design (DSbD) Technology Platform Prototype".
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include "opt_platform.h"
32
33 #include <sys/param.h>
34 #include <sys/bitstring.h>
35 #include <sys/systm.h>
36 #include <sys/bus.h>
37 #include <sys/kernel.h>
38 #include <sys/tree.h>
39 #include <sys/taskqueue.h>
40 #include <sys/sysctl.h>
41 #include <vm/vm.h>
42 #include <vm/pmap.h>
43 #include <dev/pci/pcireg.h>
44 #include <dev/pci/pcivar.h>
45 #include <dev/iommu/iommu.h>
46
47 #include "smmuvar.h"
48
49 struct smmu_quirk_entry {
50 uint16_t vendor;
51 uint16_t device;
52 const char *name;
53 uint8_t event_id;
54 uintptr_t input_address;
55 };
56
57 /* List of events that are known and will be silenced. */
58 static const struct smmu_quirk_entry smmu_quirk_table[] = {
59 { 0x10ec, 0x8168, "RealTek 8168/8111", 0x10 /* F_TRANSLATION */, 0x0 },
60 { 0, 0, NULL, 0, 0 },
61 };
62
63 bool
smmu_quirks_check(device_t dev,u_int sid,uint8_t event_id,uintptr_t input_addr)64 smmu_quirks_check(device_t dev, u_int sid, uint8_t event_id,
65 uintptr_t input_addr)
66 {
67 const struct smmu_quirk_entry *q;
68 struct smmu_ctx *ctx;
69 int i;
70
71 ctx = smmu_ctx_lookup_by_sid(dev, sid);
72 if (!ctx)
73 return (false);
74
75 for (i = 0; smmu_quirk_table[i].vendor != 0; i++) {
76 q = &smmu_quirk_table[i];
77 if (ctx->vendor == q->vendor &&
78 ctx->device == q->device &&
79 input_addr == q->input_address &&
80 event_id == q->event_id)
81 return (true);
82 }
83
84 return (false);
85 }
86