geom_flashmap.c

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    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_disk.h>
   41 #include <geom/geom_flashmap.h>
   42 #include <geom/geom_slice.h>
   43 
   44 #include <dev/nand/nand_dev.h>
   45 
   46 struct g_flashmap_slice {
   47         off_t           sl_start;
   48         off_t           sl_end;
   49         const char      *sl_name;
   50 
   51         STAILQ_ENTRY(g_flashmap_slice) sl_link;
   52 };
   53 
   54 STAILQ_HEAD(g_flashmap_head, g_flashmap_slice);
   55 
   56 static struct {
   57         const char      *type;
   58         flash_slicer_t  slicer;
   59 } g_flashmap_slicers[] = {
   60         { "NAND::device",       NULL },
   61         { "CFI::device",        NULL },
   62         { "SPI::device",        NULL },
   63         { "MMC::device",        NULL }
   64 };
   65 
   66 static g_ioctl_t g_flashmap_ioctl;
   67 static g_taste_t g_flashmap_taste;
   68 
   69 static int g_flashmap_load(device_t dev, struct g_provider *pp,
   70     flash_slicer_t slicer, struct g_flashmap_head *head);
   71 static int g_flashmap_modify(struct g_flashmap *gfp, struct g_geom *gp,
   72     const char *devname, int secsize, struct g_flashmap_head *slices);
   73 static void g_flashmap_print(struct g_flashmap_slice *slice);
   74 
   75 MALLOC_DECLARE(M_FLASHMAP);
   76 MALLOC_DEFINE(M_FLASHMAP, "geom_flashmap", "GEOM flash memory slicer class");
   77 
   78 static void
   79 g_flashmap_print(struct g_flashmap_slice *slice)
   80 {
   81 
   82         printf("%08jx-%08jx: %s (%juKB)\n", (uintmax_t)slice->sl_start,
   83             (uintmax_t)slice->sl_end, slice->sl_name,
   84             (uintmax_t)(slice->sl_end - slice->sl_start) / 1024);
   85 }
   86 
   87 static int
   88 g_flashmap_modify(struct g_flashmap *gfp, struct g_geom *gp,
   89     const char *devname, int secsize, struct g_flashmap_head *slices)
   90 {
   91         struct g_flashmap_slice *slice;
   92         int i, error;
   93 
   94         g_topology_assert();
   95 
   96         i = 0;
   97         STAILQ_FOREACH(slice, slices, sl_link) {
   98                 if (bootverbose) {
   99                         printf("%s: slice ", devname);
  100                         g_flashmap_print(slice);
  101                 }
  102 
  103                 error = g_slice_config(gp, i++, G_SLICE_CONFIG_CHECK,
  104                     slice->sl_start,
  105                     slice->sl_end - slice->sl_start + 1,
  106                     secsize, FLASH_SLICES_FMT, gp->name, slice->sl_name);
  107 
  108                 if (error)
  109                         return (error);
  110         }
  111 
  112         i = 0;
  113         STAILQ_FOREACH(slice, slices, sl_link) {
  114                 free(__DECONST(void *, gfp->labels[i]), M_FLASHMAP);
  115                 gfp->labels[i] = strdup(slice->sl_name, M_FLASHMAP);
  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         struct g_flashmap *gfp;
  156         flash_slicer_t slicer;
  157         device_t dev;
  158         int i, size;
  159 
  160         g_trace(G_T_TOPOLOGY, "flashmap_taste(%s,%s)", mp->name, pp->name);
  161         g_topology_assert();
  162 
  163         if (flags == G_TF_NORMAL &&
  164             strcmp(pp->geom->class->name, G_DISK_CLASS_NAME) != 0)
  165                 return (NULL);
  166 
  167         gp = g_slice_new(mp, FLASH_SLICES_MAX_NUM, pp, &cp, (void**)&gfp,
  168             sizeof(struct g_flashmap), NULL);
  169         if (gp == NULL)
  170                 return (NULL);
  171 
  172         STAILQ_INIT(&head);
  173 
  174         do {
  175                 slicer = NULL;
  176                 for (i = 0; i < nitems(g_flashmap_slicers); i++) {
  177                         size = sizeof(device_t);
  178                         if (g_io_getattr(g_flashmap_slicers[i].type, cp,
  179                             &size, &dev) == 0) {
  180                                 slicer = g_flashmap_slicers[i].slicer;
  181                                 break;
  182                         }
  183                 }
  184                 if (slicer == NULL)
  185                         break;
  186 
  187                 if (g_flashmap_load(dev, pp, slicer, &head) == 0)
  188                         break;
  189 
  190                 g_flashmap_modify(gfp, gp, cp->provider->name,
  191                     cp->provider->sectorsize, &head);
  192         } while (0);
  193 
  194         g_access(cp, -1, 0, 0);
  195 
  196         STAILQ_FOREACH_SAFE(slice, &head, sl_link, slice_temp)
  197                 free(slice, M_FLASHMAP);
  198 
  199         if (LIST_EMPTY(&gp->provider)) {
  200                 g_slice_spoiled(cp);
  201                 return (NULL);
  202         }
  203         return (gp);
  204 }
  205 
  206 static int
  207 g_flashmap_load(device_t dev, struct g_provider *pp, flash_slicer_t slicer,
  208     struct g_flashmap_head *head)
  209 {
  210         struct flash_slice *slices;
  211         struct g_flashmap_slice *slice;
  212         int i, nslices = 0;
  213 
  214         slices = malloc(sizeof(struct flash_slice) * FLASH_SLICES_MAX_NUM,
  215             M_FLASHMAP, M_WAITOK | M_ZERO);
  216         if (slicer(dev, pp->name, slices, &nslices) == 0) {
  217                 for (i = 0; i < nslices; i++) {
  218                         slice = malloc(sizeof(struct g_flashmap_slice),
  219                             M_FLASHMAP, M_WAITOK);
  220 
  221                         slice->sl_name = slices[i].label;
  222                         slice->sl_start = slices[i].base;
  223                         slice->sl_end = slices[i].base + slices[i].size - 1;
  224 
  225                         STAILQ_INSERT_TAIL(head, slice, sl_link);
  226                 }
  227         }
  228 
  229         free(slices, M_FLASHMAP);
  230         return (nslices);
  231 }
  232 
  233 void flash_register_slicer(flash_slicer_t slicer, u_int type, bool force)
  234 {
  235 
  236         g_topology_lock();
  237         if (g_flashmap_slicers[type].slicer == NULL || force == TRUE)
  238                 g_flashmap_slicers[type].slicer = slicer;
  239         g_topology_unlock();
  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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FreeBSD/Linux Kernel Cross Reference sys/geom/geom_flashmap.c

FreeBSD/Linux Kernel Cross Reference
sys/geom/geom_flashmap.c