1 /*-
2 * Copyright (c) 2013 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
6 * under sponsorship from the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/10.2/sys/x86/iommu/intel_quirks.c 257251 2013-10-28 13:33:29Z kib $");
32
33 #include <sys/param.h>
34 #include <sys/bus.h>
35 #include <sys/kernel.h>
36 #include <sys/lock.h>
37 #include <sys/malloc.h>
38 #include <sys/memdesc.h>
39 #include <sys/module.h>
40 #include <sys/rman.h>
41 #include <sys/rwlock.h>
42 #include <sys/smp.h>
43 #include <sys/taskqueue.h>
44 #include <sys/tree.h>
45 #include <machine/bus.h>
46 #include <contrib/dev/acpica/include/acpi.h>
47 #include <contrib/dev/acpica/include/accommon.h>
48 #include <dev/acpica/acpivar.h>
49 #include <vm/vm.h>
50 #include <vm/vm_extern.h>
51 #include <vm/vm_kern.h>
52 #include <vm/vm_object.h>
53 #include <vm/vm_page.h>
54 #include <vm/vm_pager.h>
55 #include <vm/vm_map.h>
56 #include <x86/include/busdma_impl.h>
57 #include <x86/iommu/intel_reg.h>
58 #include <x86/iommu/busdma_dmar.h>
59 #include <x86/iommu/intel_dmar.h>
60 #include <dev/pci/pcivar.h>
61
62 typedef void (*dmar_quirk_fun)(struct dmar_unit *);
63
64 struct intel_dmar_quirk_cpu {
65 u_int ext_family;
66 u_int ext_model;
67 u_int family_code;
68 u_int model;
69 u_int stepping;
70 dmar_quirk_fun quirk;
71 const char *descr;
72 };
73
74 struct intel_dmar_quirk_nb {
75 u_int dev_id;
76 u_int rev_no;
77 dmar_quirk_fun quirk;
78 const char *descr;
79 };
80
81 static void
82 dmar_match_quirks(struct dmar_unit *dmar,
83 const struct intel_dmar_quirk_nb *nb_quirks, int nb_quirks_len,
84 const struct intel_dmar_quirk_cpu *cpu_quirks, int cpu_quirks_len)
85 {
86 device_t nb;
87 const struct intel_dmar_quirk_nb *nb_quirk;
88 const struct intel_dmar_quirk_cpu *cpu_quirk;
89 u_int p[4];
90 u_int dev_id, rev_no;
91 u_int ext_family, ext_model, family_code, model, stepping;
92 int i;
93
94 if (nb_quirks != NULL) {
95 nb = pci_find_bsf(0, 0, 0);
96 if (nb != NULL) {
97 dev_id = pci_get_device(nb);
98 rev_no = pci_get_revid(nb);
99 for (i = 0; i < nb_quirks_len; i++) {
100 nb_quirk = &nb_quirks[i];
101 if (nb_quirk->dev_id == dev_id &&
102 nb_quirk->rev_no == rev_no) {
103 if (bootverbose) {
104 device_printf(dmar->dev,
105 "NB IOMMU quirk %s\n",
106 nb_quirk->descr);
107 }
108 nb_quirk->quirk(dmar);
109 }
110 }
111 } else {
112 device_printf(dmar->dev, "cannot find northbridge\n");
113 }
114 }
115 if (cpu_quirks != NULL) {
116 do_cpuid(1, p);
117 ext_family = (p[0] & CPUID_EXT_FAMILY) >> 20;
118 ext_model = (p[0] & CPUID_EXT_MODEL) >> 16;
119 family_code = (p[0] & CPUID_FAMILY) >> 8;
120 model = (p[0] & CPUID_MODEL) >> 4;
121 stepping = p[0] & CPUID_STEPPING;
122 for (i = 0; i < cpu_quirks_len; i++) {
123 cpu_quirk = &cpu_quirks[i];
124 if (cpu_quirk->ext_family == ext_family &&
125 cpu_quirk->ext_model == ext_model &&
126 cpu_quirk->family_code == family_code &&
127 cpu_quirk->model == model &&
128 (cpu_quirk->stepping == -1 ||
129 cpu_quirk->stepping == stepping)) {
130 if (bootverbose) {
131 device_printf(dmar->dev,
132 "CPU IOMMU quirk %s\n",
133 cpu_quirk->descr);
134 }
135 cpu_quirk->quirk(dmar);
136 }
137 }
138 }
139 }
140
141 static void
142 nb_5400_no_low_high_prot_mem(struct dmar_unit *unit)
143 {
144
145 unit->hw_cap &= ~(DMAR_CAP_PHMR | DMAR_CAP_PLMR);
146 }
147
148 static const struct intel_dmar_quirk_nb pre_use_nb[] = {
149 {
150 .dev_id = 0x4001, .rev_no = 0x20,
151 .quirk = nb_5400_no_low_high_prot_mem,
152 .descr = "5400 E23" /* no low/high protected memory */
153 },
154 {
155 .dev_id = 0x4003, .rev_no = 0x20,
156 .quirk = nb_5400_no_low_high_prot_mem,
157 .descr = "5400 E23" /* no low/high protected memory */
158 },
159 };
160
161 static void
162 cpu_e5_am9(struct dmar_unit *unit)
163 {
164
165 unit->hw_cap &= ~(0x3fULL << 48);
166 unit->hw_cap |= (9ULL << 48);
167 }
168
169 static const struct intel_dmar_quirk_cpu post_ident_cpu[] = {
170 {
171 .ext_family = 0, .ext_model = 2, .family_code = 6, .model = 13,
172 .stepping = 6, .quirk = cpu_e5_am9,
173 .descr = "E5 BT176" /* AM should be at most 9 */
174 },
175 };
176
177 void
178 dmar_quirks_pre_use(struct dmar_unit *dmar)
179 {
180
181 if (!dmar_barrier_enter(dmar, DMAR_BARRIER_USEQ))
182 return;
183 DMAR_LOCK(dmar);
184 dmar_match_quirks(dmar, pre_use_nb, nitems(pre_use_nb),
185 NULL, 0);
186 dmar_barrier_exit(dmar, DMAR_BARRIER_USEQ);
187 }
188
189 void
190 dmar_quirks_post_ident(struct dmar_unit *dmar)
191 {
192
193 dmar_match_quirks(dmar, NULL, 0, post_ident_cpu,
194 nitems(post_ident_cpu));
195 }
Cache object: 3e6c4ba3c9428678d8c3e171cfc9e30e
|