1 /* $NetBSD: amdnb_misc.c,v 1.5 2021/08/07 16:19:07 thorpej Exp $ */
2 /*
3 * Copyright (c) 2012 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Christoph Egger.
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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 __KERNEL_RCSID(0, "$NetBSD: amdnb_misc.c,v 1.5 2021/08/07 16:19:07 thorpej Exp $");
33
34 #include <sys/param.h>
35 #include <sys/device.h>
36
37 #include <dev/pci/pcireg.h>
38 #include <dev/pci/pcivar.h>
39 #include <dev/pci/pcidevs.h>
40
41 static int amdnb_misc_match(device_t, cfdata_t match, void *);
42 static void amdnb_misc_attach(device_t, device_t, void *);
43 static int amdnb_misc_detach(device_t, int);
44 static int amdnb_misc_rescan(device_t, const char *, const int *);
45 static void amdnb_misc_childdet(device_t, device_t);
46
47 struct amdnb_misc_softc {
48 struct pci_attach_args sc_pa;
49 };
50
51 CFATTACH_DECL3_NEW(amdnb_misc, sizeof(struct amdnb_misc_softc),
52 amdnb_misc_match, amdnb_misc_attach, amdnb_misc_detach, NULL,
53 amdnb_misc_rescan, amdnb_misc_childdet, DVF_DETACH_SHUTDOWN);
54
55
56 static int
amdnb_misc_match(device_t parent,cfdata_t match,void * aux)57 amdnb_misc_match(device_t parent, cfdata_t match, void *aux)
58 {
59 struct pci_attach_args *pa = aux;
60
61 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_AMD)
62 return 0;
63
64 switch (PCI_PRODUCT(pa->pa_id)) {
65 case PCI_PRODUCT_AMD_AMD64_MISC:
66 case PCI_PRODUCT_AMD_AMD64_F10_MISC:
67 case PCI_PRODUCT_AMD_AMD64_F11_MISC:
68 case PCI_PRODUCT_AMD_F14_NB: /* Family 12h, too */
69 case PCI_PRODUCT_AMD_F15_MISC:
70 case PCI_PRODUCT_AMD_F16_NB:
71 case PCI_PRODUCT_AMD_F16_30_NB:
72 break;
73 default:
74 return 0;
75 }
76
77 return 2; /* supercede pchb(4) */
78 }
79
80 static int
amdnb_misc_search(device_t parent,cfdata_t cf,const int * locs,void * aux)81 amdnb_misc_search(device_t parent, cfdata_t cf, const int *locs, void *aux)
82 {
83 device_t dev;
84 deviter_t di;
85 bool attach;
86
87 if (!config_probe(parent, cf, aux))
88 return 0;
89
90 attach = true;
91
92 /* Figure out if found child 'cf' is already attached.
93 * No need to attach it twice.
94 */
95
96 /* XXX: I only want to iterate over the children of *this* device.
97 * Can we introduce a
98 * deviter_first_child(&di, parent, DEVITER_F_LEAVES_ONLY)
99 * or even better, can we introduce a query function that returns
100 * if a child is already attached?
101 */
102 for (dev = deviter_first(&di, DEVITER_F_LEAVES_FIRST); dev != NULL;
103 dev = deviter_next(&di))
104 {
105 if (device_parent(dev) != parent)
106 continue;
107 if (device_is_a(dev, cf->cf_name)) {
108 attach = false;
109 break;
110 }
111 }
112 deviter_release(&di);
113
114 if (!attach)
115 return 0;
116
117 config_attach(parent, cf, aux, NULL, CFARGS_NONE);
118
119 return 0;
120 }
121
122 static void
amdnb_misc_attach(device_t parent,device_t self,void * aux)123 amdnb_misc_attach(device_t parent, device_t self, void *aux)
124 {
125 struct amdnb_misc_softc *sc = device_private(self);
126 struct pci_attach_args *pa = aux;
127
128 sc->sc_pa = *pa;
129
130 aprint_naive("\n");
131 aprint_normal(": AMD NB Misc Configuration\n");
132
133 if (!pmf_device_register(self, NULL, NULL))
134 aprint_error_dev(self, "couldn't establish power handler\n");
135
136 config_search(self, &sc->sc_pa,
137 CFARGS(.search = amdnb_misc_search));
138
139 return;
140 }
141
142 static int
amdnb_misc_detach(device_t self,int flags)143 amdnb_misc_detach(device_t self, int flags)
144 {
145 int rv;
146
147 rv = config_detach_children(self, flags);
148 if (rv != 0)
149 return rv;
150
151 pmf_device_deregister(self);
152 return rv;
153 }
154
155 static int
amdnb_misc_rescan(device_t self,const char * ifattr,const int * locators)156 amdnb_misc_rescan(device_t self, const char *ifattr, const int *locators)
157 {
158 struct amdnb_misc_softc *sc = device_private(self);
159
160 config_search(self, &sc->sc_pa,
161 CFARGS(.search = amdnb_misc_search));
162
163 return 0;
164 }
165
166 static void
amdnb_misc_childdet(device_t self,device_t child)167 amdnb_misc_childdet(device_t self, device_t child)
168 {
169 return;
170 }
171