1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
/*-
* Copyright (c) 2006 Kip Macy
* Copyright (c) 2001 Benno Rice
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/sun4v/sun4v/simdisk.c,v 1.2.8.1 2009/04/15 03:14:26 kensmith Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bio.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/linker.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <geom/geom.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/openfirm.h>
#include <machine/hv_api.h>
#define HVD_BLOCKSIZE 512
struct hvd_softc
{
struct bio_queue_head hvd_bio_queue;
struct mtx hvd_queue_mtx;
off_t hvd_mediasize;
unsigned hvd_sectorsize;
unsigned hvd_fwheads;
unsigned hvd_fwsectors;
struct proc *hvd_procp;
struct g_geom *hvd_gp;
struct g_provider *hvd_pp;
} hvd_softc;
static g_init_t g_hvd_init;
static g_start_t g_hvd_start;
static g_access_t g_hvd_access;
struct g_class g_hvd_class = {
.name = "HVD",
.version = G_VERSION,
.init = g_hvd_init,
.start = g_hvd_start,
.access = g_hvd_access,
};
DECLARE_GEOM_CLASS(g_hvd_class, g_hvd);
static int
hvd_startio(struct hvd_softc *sc, struct bio *bp)
{
u_int r;
int len, rlen, wlen;
uint64_t page_off;
r = H_EOK;
len = 0;
page_off = bp->bio_offset & PAGE_MASK;
switch (bp->bio_cmd) {
case BIO_READ:
if (bp->bio_length > (PAGE_SIZE - page_off)) {
len = rlen = (PAGE_SIZE - page_off);
r = hv_sim_read(bp->bio_offset, vtophys((char *)bp->bio_data), rlen);
}
for (; len < bp->bio_length && r == H_EOK; len += PAGE_SIZE) {
rlen = (bp->bio_length - len) > PAGE_SIZE ? PAGE_SIZE : bp->bio_length - len;
r = hv_sim_read(bp->bio_offset + len, vtophys((char *)bp->bio_data + len), rlen);
}
break;
case BIO_WRITE:
if (bp->bio_length > (PAGE_SIZE - page_off)) {
len = wlen = (PAGE_SIZE - page_off);
r = hv_sim_write(bp->bio_offset, vtophys((char *)bp->bio_data), wlen);
}
for (; len < bp->bio_length && r == H_EOK; len += PAGE_SIZE) {
wlen = (bp->bio_length - len) > PAGE_SIZE ? PAGE_SIZE : bp->bio_length - len;
r = hv_sim_write(bp->bio_offset + len, vtophys((char *)bp->bio_data + len), wlen);
}
break;
}
if (r != H_EOK)
panic("invalid I/O");
bp->bio_resid = 0;
return (0);
}
static void
hvd_kthread(void *arg)
{
struct hvd_softc *sc;
struct bio *bp;
int error;
sc = arg;
curthread->td_base_pri = PRIBIO;
for (;;) {
mtx_lock(&sc->hvd_queue_mtx);
bp = bioq_takefirst(&sc->hvd_bio_queue);
if (!bp) {
msleep(sc, &sc->hvd_queue_mtx, PRIBIO | PDROP,
"hvdwait", 0);
continue;
}
mtx_unlock(&sc->hvd_queue_mtx);
if (bp->bio_cmd == BIO_GETATTR) {
error = EOPNOTSUPP;
} else
error = hvd_startio(sc, bp);
if (error != -1) {
bp->bio_completed = bp->bio_length;
g_io_deliver(bp, error);
}
}
}
static void
g_hvd_init(struct g_class *mp __unused)
{
struct hvd_softc *sc;
struct g_geom *gp;
struct g_provider *pp;
int error;
printf("calling g_hvd_init\n");
sc = (struct hvd_softc *)malloc(sizeof *sc, M_DEVBUF,
M_WAITOK|M_ZERO);
bioq_init(&sc->hvd_bio_queue);
mtx_init(&sc->hvd_queue_mtx, "hvd bio queue", NULL, MTX_DEF);
sc->hvd_mediasize = (off_t)0x20000000;
sc->hvd_sectorsize = HVD_BLOCKSIZE;
sc->hvd_fwsectors = 0;
sc->hvd_fwheads = 0;
error = kthread_create(hvd_kthread, sc, &sc->hvd_procp, 0, 0,
"hvd0");
if (error != 0) {
free(sc, M_DEVBUF);
return;
}
gp = g_new_geomf(&g_hvd_class, "hvd0");
gp->softc = sc;
pp = g_new_providerf(gp, "hvd0");
pp->mediasize = sc->hvd_mediasize;
pp->sectorsize = sc->hvd_sectorsize;
sc->hvd_gp = gp;
sc->hvd_pp = pp;
g_error_provider(pp, 0);
}
static void
g_hvd_start(struct bio *bp)
{
struct hvd_softc *sc;
#if 0
printf("in hvd_start\n");
#endif
sc = bp->bio_to->geom->softc;
mtx_lock(&sc->hvd_queue_mtx);
bioq_disksort(&sc->hvd_bio_queue, bp);
mtx_unlock(&sc->hvd_queue_mtx);
wakeup(sc);
}
static int
g_hvd_access(struct g_provider *pp, int r, int w, int e)
{
if (pp->geom->softc == NULL)
return (ENXIO);
return (0);
}
static int
hvd_probe(device_t dev)
{
if (strcmp(ofw_bus_get_name(dev), "disk"))
return (ENXIO);
device_set_desc(dev, "sun4v virtual disk");
return (0);
}
static int
hvd_attach(device_t dev)
{
return (0);
}
static device_method_t hvd_methods[] = {
DEVMETHOD(device_probe, hvd_probe),
DEVMETHOD(device_attach, hvd_attach),
{0, 0}
};
static driver_t hvd_driver = {
"hvd",
hvd_methods,
0,
};
static devclass_t hvd_devclass;
DRIVER_MODULE(hvd, vnex, hvd_driver, hvd_devclass, 0, 0);
|
