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/slicer.h> 38 39 #include <geom/geom.h> 40 #include <geom/geom_slice.h> 41 #include <geom/geom_disk.h> 42 43 #include <dev/nand/nand_dev.h> 44 45 #define FLASHMAP_CLASS_NAME "Flashmap" 46 47 struct g_flashmap_slice { 48 off_t sl_start; 49 off_t sl_end; 50 const char *sl_name; 51 52 STAILQ_ENTRY(g_flashmap_slice) sl_link; 53 }; 54 55 STAILQ_HEAD(g_flashmap_head, g_flashmap_slice); 56 57 static struct { 58 const char *type; 59 flash_slicer_t slicer; 60 } g_flashmap_slicers[] = { 61 { "NAND::device", NULL }, 62 { "CFI::device", NULL }, 63 { "SPI::device", NULL }, 64 { "MMC::device", NULL } 65 }; 66 67 static g_ioctl_t g_flashmap_ioctl; 68 static g_taste_t g_flashmap_taste; 69 70 static int g_flashmap_load(device_t dev, struct g_provider *pp, 71 flash_slicer_t slicer, struct g_flashmap_head *head); 72 static int g_flashmap_modify(struct g_geom *gp, const char *devname, 73 int secsize, struct g_flashmap_head *slices); 74 static void g_flashmap_print(struct g_flashmap_slice *slice); 75 76 MALLOC_DECLARE(M_FLASHMAP); 77 MALLOC_DEFINE(M_FLASHMAP, "geom_flashmap", "GEOM flash memory slicer class"); 78 79 static void 80 g_flashmap_print(struct g_flashmap_slice *slice) 81 { 82 83 printf("%08jx-%08jx: %s (%juKB)\n", (uintmax_t)slice->sl_start, 84 (uintmax_t)slice->sl_end, slice->sl_name, 85 (uintmax_t)(slice->sl_end - slice->sl_start) / 1024); 86 } 87 88 static int 89 g_flashmap_modify(struct g_geom *gp, const char *devname, int secsize, 90 struct g_flashmap_head *slices) 91 { 92 struct g_flashmap_slice *slice; 93 int i, error; 94 95 g_topology_assert(); 96 97 i = 0; 98 STAILQ_FOREACH(slice, slices, sl_link) { 99 if (bootverbose) { 100 printf("%s: slice ", devname); 101 g_flashmap_print(slice); 102 } 103 104 error = g_slice_config(gp, i++, G_SLICE_CONFIG_CHECK, 105 slice->sl_start, 106 slice->sl_end - slice->sl_start + 1, 107 secsize, FLASH_SLICES_FMT, gp->name, slice->sl_name); 108 109 if (error) 110 return (error); 111 } 112 113 i = 0; 114 STAILQ_FOREACH(slice, slices, sl_link) { 115 error = g_slice_config(gp, i++, G_SLICE_CONFIG_SET, 116 slice->sl_start, 117 slice->sl_end - slice->sl_start + 1, 118 secsize, "%ss.%s", gp->name, slice->sl_name); 119 120 if (error) 121 return (error); 122 } 123 124 return (0); 125 } 126 127 static int 128 g_flashmap_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, 129 struct thread *td) 130 { 131 struct g_consumer *cp; 132 struct g_geom *gp; 133 134 if (cmd != NAND_IO_GET_CHIP_PARAM) 135 return (ENOIOCTL); 136 137 cp = LIST_FIRST(&pp->geom->consumer); 138 if (cp == NULL) 139 return (ENOIOCTL); 140 gp = cp->provider->geom; 141 if (gp->ioctl == NULL) 142 return (ENOIOCTL); 143 144 return (gp->ioctl(cp->provider, cmd, data, fflag, td)); 145 } 146 147 static struct g_geom * 148 g_flashmap_taste(struct g_class *mp, struct g_provider *pp, int flags) 149 { 150 struct g_geom *gp; 151 struct g_consumer *cp; 152 struct g_flashmap_head head; 153 struct g_flashmap_slice *slice, *slice_temp; 154 flash_slicer_t slicer; 155 device_t dev; 156 int i, size; 157 158 g_trace(G_T_TOPOLOGY, "flashmap_taste(%s,%s)", mp->name, pp->name); 159 g_topology_assert(); 160 161 if (flags == G_TF_NORMAL && 162 strcmp(pp->geom->class->name, G_DISK_CLASS_NAME) != 0) 163 return (NULL); 164 165 gp = g_slice_new(mp, FLASH_SLICES_MAX_NUM, pp, &cp, NULL, 0, NULL); 166 if (gp == NULL) 167 return (NULL); 168 169 STAILQ_INIT(&head); 170 171 do { 172 slicer = NULL; 173 for (i = 0; i < nitems(g_flashmap_slicers); i++) { 174 size = sizeof(device_t); 175 if (g_io_getattr(g_flashmap_slicers[i].type, cp, 176 &size, &dev) == 0) { 177 slicer = g_flashmap_slicers[i].slicer; 178 break; 179 } 180 } 181 if (slicer == NULL) 182 break; 183 184 if (g_flashmap_load(dev, pp, slicer, &head) == 0) 185 break; 186 187 g_flashmap_modify(gp, cp->provider->name, 188 cp->provider->sectorsize, &head); 189 } while (0); 190 191 g_access(cp, -1, 0, 0); 192 193 STAILQ_FOREACH_SAFE(slice, &head, sl_link, slice_temp) 194 free(slice, M_FLASHMAP); 195 196 if (LIST_EMPTY(&gp->provider)) { 197 g_slice_spoiled(cp); 198 return (NULL); 199 } 200 return (gp); 201 } 202 203 static int 204 g_flashmap_load(device_t dev, struct g_provider *pp, flash_slicer_t slicer, 205 struct g_flashmap_head *head) 206 { 207 struct flash_slice *slices; 208 struct g_flashmap_slice *slice; 209 int i, nslices = 0; 210 211 slices = malloc(sizeof(struct flash_slice) * FLASH_SLICES_MAX_NUM, 212 M_FLASHMAP, M_WAITOK | M_ZERO); 213 if (slicer(dev, pp->name, slices, &nslices) == 0) { 214 for (i = 0; i < nslices; i++) { 215 slice = malloc(sizeof(struct g_flashmap_slice), 216 M_FLASHMAP, M_WAITOK); 217 218 slice->sl_name = slices[i].label; 219 slice->sl_start = slices[i].base; 220 slice->sl_end = slices[i].base + slices[i].size - 1; 221 222 STAILQ_INSERT_TAIL(head, slice, sl_link); 223 } 224 } 225 226 free(slices, M_FLASHMAP); 227 return (nslices); 228 } 229 230 void flash_register_slicer(flash_slicer_t slicer, u_int type, bool force) 231 { 232 233 g_topology_lock(); 234 if (g_flashmap_slicers[type].slicer == NULL || force == TRUE) 235 g_flashmap_slicers[type].slicer = slicer; 236 g_topology_unlock(); 237 } 238 239 static struct g_class g_flashmap_class = { 240 .name = FLASHMAP_CLASS_NAME, 241 .version = G_VERSION, 242 .taste = g_flashmap_taste, 243 .ioctl = g_flashmap_ioctl, 244 }; 245 246 DECLARE_GEOM_CLASS(g_flashmap_class, g_flashmap); 247 MODULE_VERSION(g_flashmap, 0); 248