1 /*-
2 * Copyright (c) 2012 Semihalf
3 * Copyright (c) 2009 Jakub Klama <jakub.klama@uj.edu.pl>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/malloc.h>
35 #include <sys/lock.h>
36 #include <sys/mutex.h>
37 #include <sys/proc.h>
38 #include <sys/slicer.h>
39
40 #include <geom/geom.h>
41 #include <geom/geom_slice.h>
42 #include <geom/geom_disk.h>
43
44 #include <dev/nand/nand_dev.h>
45
46 #define FLASHMAP_CLASS_NAME "Flashmap"
47
48 struct g_flashmap_slice {
49 off_t sl_start;
50 off_t sl_end;
51 const char *sl_name;
52
53 STAILQ_ENTRY(g_flashmap_slice) sl_link;
54 };
55
56 STAILQ_HEAD(g_flashmap_head, g_flashmap_slice);
57
58 static struct {
59 const char *type;
60 flash_slicer_t slicer;
61 } g_flashmap_slicers[] = {
62 { "NAND::device", NULL },
63 { "CFI::device", NULL },
64 { "SPI::device", NULL },
65 { "MMC::device", NULL }
66 };
67
68 static g_ioctl_t g_flashmap_ioctl;
69 static g_taste_t g_flashmap_taste;
70
71 static int g_flashmap_load(device_t dev, struct g_provider *pp,
72 flash_slicer_t slicer, struct g_flashmap_head *head);
73 static int g_flashmap_modify(struct g_geom *gp, const char *devname,
74 int secsize, struct g_flashmap_head *slices);
75 static void g_flashmap_print(struct g_flashmap_slice *slice);
76
77 MALLOC_DECLARE(M_FLASHMAP);
78 MALLOC_DEFINE(M_FLASHMAP, "geom_flashmap", "GEOM flash memory slicer class");
79
80 static void
81 g_flashmap_print(struct g_flashmap_slice *slice)
82 {
83
84 printf("%08jx-%08jx: %s (%juKB)\n", (uintmax_t)slice->sl_start,
85 (uintmax_t)slice->sl_end, slice->sl_name,
86 (uintmax_t)(slice->sl_end - slice->sl_start) / 1024);
87 }
88
89 static int
90 g_flashmap_modify(struct g_geom *gp, const char *devname, int secsize,
91 struct g_flashmap_head *slices)
92 {
93 struct g_flashmap_slice *slice;
94 int i, error;
95
96 g_topology_assert();
97
98 i = 0;
99 STAILQ_FOREACH(slice, slices, sl_link) {
100 if (bootverbose) {
101 printf("%s: slice ", devname);
102 g_flashmap_print(slice);
103 }
104
105 error = g_slice_config(gp, i++, G_SLICE_CONFIG_CHECK,
106 slice->sl_start,
107 slice->sl_end - slice->sl_start + 1,
108 secsize, FLASH_SLICES_FMT, gp->name, slice->sl_name);
109
110 if (error)
111 return (error);
112 }
113
114 i = 0;
115 STAILQ_FOREACH(slice, slices, sl_link) {
116 error = g_slice_config(gp, i++, G_SLICE_CONFIG_SET,
117 slice->sl_start,
118 slice->sl_end - slice->sl_start + 1,
119 secsize, "%ss.%s", gp->name, slice->sl_name);
120
121 if (error)
122 return (error);
123 }
124
125 return (0);
126 }
127
128 static int
129 g_flashmap_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag,
130 struct thread *td)
131 {
132 struct g_consumer *cp;
133 struct g_geom *gp;
134
135 if (cmd != NAND_IO_GET_CHIP_PARAM)
136 return (ENOIOCTL);
137
138 cp = LIST_FIRST(&pp->geom->consumer);
139 if (cp == NULL)
140 return (ENOIOCTL);
141 gp = cp->provider->geom;
142 if (gp->ioctl == NULL)
143 return (ENOIOCTL);
144
145 return (gp->ioctl(cp->provider, cmd, data, fflag, td));
146 }
147
148 static struct g_geom *
149 g_flashmap_taste(struct g_class *mp, struct g_provider *pp, int flags)
150 {
151 struct g_geom *gp;
152 struct g_consumer *cp;
153 struct g_flashmap_head head;
154 struct g_flashmap_slice *slice, *slice_temp;
155 flash_slicer_t slicer;
156 device_t dev;
157 int i, size;
158
159 g_trace(G_T_TOPOLOGY, "flashmap_taste(%s,%s)", mp->name, pp->name);
160 g_topology_assert();
161
162 if (flags == G_TF_NORMAL &&
163 strcmp(pp->geom->class->name, G_DISK_CLASS_NAME) != 0)
164 return (NULL);
165
166 gp = g_slice_new(mp, FLASH_SLICES_MAX_NUM, pp, &cp, NULL, 0, NULL);
167 if (gp == NULL)
168 return (NULL);
169
170 STAILQ_INIT(&head);
171
172 do {
173 slicer = NULL;
174 for (i = 0; i < nitems(g_flashmap_slicers); i++) {
175 size = sizeof(device_t);
176 if (g_io_getattr(g_flashmap_slicers[i].type, cp,
177 &size, &dev) == 0) {
178 slicer = g_flashmap_slicers[i].slicer;
179 break;
180 }
181 }
182 if (slicer == NULL)
183 break;
184
185 if (g_flashmap_load(dev, pp, slicer, &head) == 0)
186 break;
187
188 g_flashmap_modify(gp, cp->provider->name,
189 cp->provider->sectorsize, &head);
190 } while (0);
191
192 g_access(cp, -1, 0, 0);
193
194 STAILQ_FOREACH_SAFE(slice, &head, sl_link, slice_temp)
195 free(slice, M_FLASHMAP);
196
197 if (LIST_EMPTY(&gp->provider)) {
198 g_slice_spoiled(cp);
199 return (NULL);
200 }
201 return (gp);
202 }
203
204 static int
205 g_flashmap_load(device_t dev, struct g_provider *pp, flash_slicer_t slicer,
206 struct g_flashmap_head *head)
207 {
208 struct flash_slice *slices;
209 struct g_flashmap_slice *slice;
210 int i, nslices = 0;
211
212 slices = malloc(sizeof(struct flash_slice) * FLASH_SLICES_MAX_NUM,
213 M_FLASHMAP, M_WAITOK | M_ZERO);
214 if (slicer(dev, pp->name, slices, &nslices) == 0) {
215 for (i = 0; i < nslices; i++) {
216 slice = malloc(sizeof(struct g_flashmap_slice),
217 M_FLASHMAP, M_WAITOK);
218
219 slice->sl_name = slices[i].label;
220 slice->sl_start = slices[i].base;
221 slice->sl_end = slices[i].base + slices[i].size - 1;
222
223 STAILQ_INSERT_TAIL(head, slice, sl_link);
224 }
225 }
226
227 free(slices, M_FLASHMAP);
228 return (nslices);
229 }
230
231 void flash_register_slicer(flash_slicer_t slicer, u_int type, bool force)
232 {
233
234 DROP_GIANT();
235 g_topology_lock();
236 if (g_flashmap_slicers[type].slicer == NULL || force == TRUE)
237 g_flashmap_slicers[type].slicer = slicer;
238 g_topology_unlock();
239 PICKUP_GIANT();
240 }
241
242 static struct g_class g_flashmap_class = {
243 .name = FLASHMAP_CLASS_NAME,
244 .version = G_VERSION,
245 .taste = g_flashmap_taste,
246 .ioctl = g_flashmap_ioctl,
247 };
248
249 DECLARE_GEOM_CLASS(g_flashmap_class, g_flashmap);
250 MODULE_VERSION(g_flashmap, 0);
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