geom_flashmap.c

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    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: releng/12.0/sys/geom/geom_flashmap.c 326270 2017-11-27 15:17:37Z pfg $");
   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_slice.h>
   43 #include <geom/geom_disk.h>
   44 
   45 #include <dev/nand/nand_dev.h>
   46 
   47 #define FLASHMAP_CLASS_NAME "Flashmap"
   48 
   49 struct g_flashmap_slice {
   50         off_t           sl_start;
   51         off_t           sl_end;
   52         const char      *sl_name;
   53 
   54         STAILQ_ENTRY(g_flashmap_slice) sl_link;
   55 };
   56 
   57 STAILQ_HEAD(g_flashmap_head, g_flashmap_slice);
   58 
   59 static struct {
   60         const char      *type;
   61         flash_slicer_t  slicer;
   62 } g_flashmap_slicers[] = {
   63         { "NAND::device",       NULL },
   64         { "CFI::device",        NULL },
   65         { "SPI::device",        NULL },
   66         { "MMC::device",        NULL }
   67 };
   68 
   69 static g_ioctl_t g_flashmap_ioctl;
   70 static g_taste_t g_flashmap_taste;
   71 
   72 static int g_flashmap_load(device_t dev, struct g_provider *pp,
   73     flash_slicer_t slicer, struct g_flashmap_head *head);
   74 static int g_flashmap_modify(struct g_geom *gp, const char *devname,
   75     int secsize, struct g_flashmap_head *slices);
   76 static void g_flashmap_print(struct g_flashmap_slice *slice);
   77 
   78 MALLOC_DECLARE(M_FLASHMAP);
   79 MALLOC_DEFINE(M_FLASHMAP, "geom_flashmap", "GEOM flash memory slicer class");
   80 
   81 static void
   82 g_flashmap_print(struct g_flashmap_slice *slice)
   83 {
   84 
   85         printf("%08jx-%08jx: %s (%juKB)\n", (uintmax_t)slice->sl_start,
   86             (uintmax_t)slice->sl_end, slice->sl_name,
   87             (uintmax_t)(slice->sl_end - slice->sl_start) / 1024);
   88 }
   89 
   90 static int
   91 g_flashmap_modify(struct g_geom *gp, const char *devname, int secsize,
   92     struct g_flashmap_head *slices)
   93 {
   94         struct g_flashmap_slice *slice;
   95         int i, error;
   96 
   97         g_topology_assert();
   98 
   99         i = 0;
  100         STAILQ_FOREACH(slice, slices, sl_link) {
  101                 if (bootverbose) {
  102                         printf("%s: slice ", devname);
  103                         g_flashmap_print(slice);
  104                 }
  105 
  106                 error = g_slice_config(gp, i++, G_SLICE_CONFIG_CHECK,
  107                     slice->sl_start,
  108                     slice->sl_end - slice->sl_start + 1,
  109                     secsize, FLASH_SLICES_FMT, gp->name, slice->sl_name);
  110 
  111                 if (error)
  112                         return (error);
  113         }
  114 
  115         i = 0;
  116         STAILQ_FOREACH(slice, slices, sl_link) {
  117                 error = g_slice_config(gp, i++, G_SLICE_CONFIG_SET,
  118                     slice->sl_start,
  119                     slice->sl_end - slice->sl_start + 1,
  120                     secsize, "%ss.%s", gp->name, slice->sl_name);
  121 
  122                 if (error)
  123                         return (error);
  124         }
  125 
  126         return (0);
  127 }
  128 
  129 static int
  130 g_flashmap_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag,
  131     struct thread *td)
  132 {
  133         struct g_consumer *cp;
  134         struct g_geom *gp;
  135 
  136         if (cmd != NAND_IO_GET_CHIP_PARAM)
  137                 return (ENOIOCTL);
  138 
  139         cp = LIST_FIRST(&pp->geom->consumer);
  140         if (cp == NULL)
  141                 return (ENOIOCTL);
  142         gp = cp->provider->geom;
  143         if (gp->ioctl == NULL)
  144                 return (ENOIOCTL);
  145 
  146         return (gp->ioctl(cp->provider, cmd, data, fflag, td));
  147 }
  148 
  149 static struct g_geom *
  150 g_flashmap_taste(struct g_class *mp, struct g_provider *pp, int flags)
  151 {
  152         struct g_geom *gp;
  153         struct g_consumer *cp;
  154         struct g_flashmap_head head;
  155         struct g_flashmap_slice *slice, *slice_temp;
  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, NULL, 0, NULL);
  168         if (gp == NULL)
  169                 return (NULL);
  170 
  171         STAILQ_INIT(&head);
  172 
  173         do {
  174                 slicer = NULL;
  175                 for (i = 0; i < nitems(g_flashmap_slicers); i++) {
  176                         size = sizeof(device_t);
  177                         if (g_io_getattr(g_flashmap_slicers[i].type, cp,
  178                             &size, &dev) == 0) {
  179                                 slicer = g_flashmap_slicers[i].slicer;
  180                                 break;
  181                         }
  182                 }
  183                 if (slicer == NULL)
  184                         break;
  185 
  186                 if (g_flashmap_load(dev, pp, slicer, &head) == 0)
  187                         break;
  188 
  189                 g_flashmap_modify(gp, cp->provider->name,
  190                     cp->provider->sectorsize, &head);
  191         } while (0);
  192 
  193         g_access(cp, -1, 0, 0);
  194 
  195         STAILQ_FOREACH_SAFE(slice, &head, sl_link, slice_temp)
  196                 free(slice, M_FLASHMAP);
  197 
  198         if (LIST_EMPTY(&gp->provider)) {
  199                 g_slice_spoiled(cp);
  200                 return (NULL);
  201         }
  202         return (gp);
  203 }
  204 
  205 static int
  206 g_flashmap_load(device_t dev, struct g_provider *pp, flash_slicer_t slicer,
  207     struct g_flashmap_head *head)
  208 {
  209         struct flash_slice *slices;
  210         struct g_flashmap_slice *slice;
  211         int i, nslices = 0;
  212 
  213         slices = malloc(sizeof(struct flash_slice) * FLASH_SLICES_MAX_NUM,
  214             M_FLASHMAP, M_WAITOK | M_ZERO);
  215         if (slicer(dev, pp->name, slices, &nslices) == 0) {
  216                 for (i = 0; i < nslices; i++) {
  217                         slice = malloc(sizeof(struct g_flashmap_slice),
  218                             M_FLASHMAP, M_WAITOK);
  219 
  220                         slice->sl_name = slices[i].label;
  221                         slice->sl_start = slices[i].base;
  222                         slice->sl_end = slices[i].base + slices[i].size - 1;
  223 
  224                         STAILQ_INSERT_TAIL(head, slice, sl_link);
  225                 }
  226         }
  227 
  228         free(slices, M_FLASHMAP);
  229         return (nslices);
  230 }
  231 
  232 void flash_register_slicer(flash_slicer_t slicer, u_int type, bool force)
  233 {
  234 
  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 }
  240 
  241 static struct g_class g_flashmap_class = {
  242         .name = FLASHMAP_CLASS_NAME,
  243         .version = G_VERSION,
  244         .taste = g_flashmap_taste,
  245         .ioctl = g_flashmap_ioctl,
  246 };
  247 
  248 DECLARE_GEOM_CLASS(g_flashmap_class, g_flashmap);
  249 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