cfe_resource.c revision 265999 
1/*-
2 * Copyright (c) 2007 Bruce M. Simpson.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27/*
28 * Driver to swallow up memory ranges reserved by CFE platform firmware.
29 * CFE on Sentry5 doesn't specify reserved ranges, so this is not useful
30 * at the present time.
31 * TODO: Don't attach this off nexus.
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: stable/10/sys/dev/cfe/cfe_resource.c 265999 2014-05-14 01:35:43Z ian $");
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/kernel.h>
40#include <sys/socket.h>
41
42#include <sys/module.h>
43#include <sys/bus.h>
44
45#include <machine/bus.h>
46#include <machine/resource.h>
47#include <sys/rman.h>
48
49#include <dev/cfe/cfe_api.h>
50#include <dev/cfe/cfe_error.h>
51
52#define MAX_CFE_RESERVATIONS 16
53
54struct cferes_softc {
55	int		 rnum;
56	int		 rid[MAX_CFE_RESERVATIONS];
57	struct resource	*res[MAX_CFE_RESERVATIONS];
58};
59
60static int
61cferes_probe(device_t dev)
62{
63
64	return (BUS_PROBE_NOWILDCARD);
65}
66
67static int
68cferes_attach(device_t dev)
69{
70
71	return (0);
72}
73
74static void
75cferes_identify(driver_t* driver, device_t parent)
76{
77	device_t		 child;
78	int			 i;
79	struct resource		*res;
80	int			 result;
81	int			 rid;
82	struct cferes_softc	*sc;
83	uint64_t		 addr, len, type;
84
85	child = BUS_ADD_CHILD(parent, 100, "cferes", -1);
86	device_set_driver(child, driver);
87	sc = device_get_softc(child);
88
89	sc->rnum = 0;
90	for (i = 0; i < ~0U; i++) {
91		result = cfe_enummem(i, CFE_FLG_FULL_ARENA, &addr, &len, &type);
92		if (result < 0)
93			break;
94		if (type != CFE_MI_RESERVED) {
95			if (bootverbose)
96			printf("%s: skipping non reserved range 0x%0jx(%jd)\n",
97			    device_getnameunit(child),
98			    (uintmax_t)addr, (uintmax_t)len);
99			continue;
100		}
101
102		bus_set_resource(child, SYS_RES_MEMORY, sc->rnum, addr, len);
103		rid = sc->rnum;
104		res = bus_alloc_resource_any(child, SYS_RES_MEMORY, &rid, 0);
105		if (res == NULL) {
106			bus_delete_resource(child, SYS_RES_MEMORY, sc->rnum);
107			continue;
108		}
109		sc->rid[sc->rnum] = rid;
110		sc->res[sc->rnum] = res;
111
112		sc->rnum++;
113		if (sc->rnum == MAX_CFE_RESERVATIONS)
114			break;
115	}
116
117	if (sc->rnum == 0) {
118		device_delete_child(parent, child);
119		return;
120	}
121
122	device_set_desc(child, "CFE reserved memory");
123}
124
125static int
126cferes_detach(device_t dev)
127{
128	int			i;
129	struct cferes_softc	*sc = device_get_softc(dev);
130
131	for (i = 0; i < sc->rnum; i++) {
132		bus_release_resource(dev, SYS_RES_MEMORY, sc->rid[i],
133		    sc->res[i]);
134	}
135
136	return (0);
137}
138
139static device_method_t cferes_methods[] = {
140	/* Device interface */
141	DEVMETHOD(device_identify,	cferes_identify),
142	DEVMETHOD(device_probe,		cferes_probe),
143	DEVMETHOD(device_attach,	cferes_attach),
144	DEVMETHOD(device_detach,	cferes_detach),
145	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
146	DEVMETHOD(device_suspend,	bus_generic_suspend),
147	DEVMETHOD(device_resume,	bus_generic_resume),
148	{ 0, 0 }
149};
150
151static driver_t cferes_driver = {
152	"cferes",
153	cferes_methods,
154	sizeof (struct cferes_softc)
155};
156
157static devclass_t cferes_devclass;
158
159DRIVER_MODULE(cfe, nexus, cferes_driver, cferes_devclass, 0, 0);
160