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: releng/11.2/sys/geom/geom_flashmap.c 318158 2017-05-10 21:42:12Z marius $");
   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);

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

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