amdnb_misc.c revision 1.4 
1/*	$NetBSD: amdnb_misc.c,v 1.4 2021/04/24 23:36:51 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 1.4 2021/04/24 23:36:51 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
41static int amdnb_misc_match(device_t, cfdata_t match, void *);
42static void amdnb_misc_attach(device_t, device_t, void *);
43static int amdnb_misc_detach(device_t, int);
44static int amdnb_misc_rescan(device_t, const char *, const int *);
45static void amdnb_misc_childdet(device_t, device_t);
46
47struct amdnb_misc_softc {
48	struct pci_attach_args sc_pa;
49};
50
51CFATTACH_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
56static int
57amdnb_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
80static int
81amdnb_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, CFARG_EOL);
118
119	return 0;
120}
121
122static void
123amdnb_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	    CFARG_SEARCH, amdnb_misc_search,
138	    CFARG_EOL);
139
140	return;
141}
142
143static int
144amdnb_misc_detach(device_t self, int flags)
145{
146	int rv;
147
148	rv = config_detach_children(self, flags);
149	if (rv != 0)
150		return rv;
151
152	pmf_device_deregister(self);
153	return rv;
154}
155
156static int
157amdnb_misc_rescan(device_t self, const char *ifattr, const int *locators)
158{
159	struct amdnb_misc_softc *sc = device_private(self);
160
161	config_search(self, &sc->sc_pa,
162	    CFARG_SEARCH, amdnb_misc_search,
163	    CFARG_EOL);
164
165	return 0;
166}
167
168static void
169amdnb_misc_childdet(device_t self, device_t child)
170{
171	return;
172}
173