sys/geom/geom_flashmap.c

   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);