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