The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/geom/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/10.0/sys/geom/geom_flashmap.c 251117 2013-05-30 01:19:02Z brooks $");
   30 
   31 #include <sys/param.h>
   32 #include <sys/endian.h>
   33 #include <sys/systm.h>
   34 #include <sys/kernel.h>
   35 #include <sys/fcntl.h>
   36 #include <sys/malloc.h>
   37 #include <sys/bio.h>
   38 #include <sys/bus.h>
   39 #include <sys/lock.h>
   40 #include <sys/mutex.h>
   41 #include <sys/slicer.h>
   42 
   43 #include <geom/geom.h>
   44 #include <geom/geom_slice.h>
   45 #include <geom/geom_disk.h>
   46 #include <dev/nand/nand_dev.h>
   47 
   48 #define FLASHMAP_CLASS_NAME "Flashmap"
   49 
   50 struct g_flashmap_slice {
   51         off_t           sl_start;
   52         off_t           sl_end;
   53         const char      *sl_name;
   54 
   55         STAILQ_ENTRY(g_flashmap_slice) sl_link;
   56 };
   57 
   58 STAILQ_HEAD(g_flashmap_head, g_flashmap_slice);
   59 
   60 static void g_flashmap_print(struct g_flashmap_slice *);
   61 static int g_flashmap_modify(struct g_geom *, const char *,
   62     int, struct g_flashmap_head *);
   63 static int g_flashmap_start(struct bio *);
   64 static int g_flashmap_ioctl(struct g_provider *, u_long, void *,
   65     int, struct thread *);
   66 static void g_flashmap_dumpconf(struct sbuf *, const char *,
   67     struct g_geom *, struct g_consumer *, struct g_provider *);
   68 static struct g_geom *g_flashmap_taste(struct g_class *,
   69     struct g_provider *, int);
   70 static void g_flashmap_config(struct gctl_req *, struct g_class *,
   71     const char *);
   72 static int g_flashmap_load(device_t, struct g_flashmap_head *);
   73 
   74 MALLOC_DECLARE(M_FLASHMAP);
   75 MALLOC_DEFINE(M_FLASHMAP, "geom_flashmap", "GEOM flash memory slicer class");
   76 
   77 static void
   78 g_flashmap_print(struct g_flashmap_slice *slice)
   79 {
   80 
   81         printf("%08jx-%08jx: %s (%juKB)\n", (uintmax_t)slice->sl_start,
   82             (uintmax_t)slice->sl_end, slice->sl_name,
   83             (uintmax_t)(slice->sl_end - slice->sl_start) / 1024);
   84 }
   85 
   86 static int
   87 g_flashmap_modify(struct g_geom *gp, const char *devname, int secsize,
   88     struct g_flashmap_head *slices)
   89 {
   90         struct g_flashmap_slice *slice;
   91         int i, error;
   92 
   93         g_topology_assert();
   94 
   95         i = 0;
   96         STAILQ_FOREACH(slice, slices, sl_link) {
   97                 if (bootverbose) {
   98                         printf("%s: slice ", devname);
   99                         g_flashmap_print(slice);
  100                 }
  101 
  102                 error = g_slice_config(gp, i++, G_SLICE_CONFIG_CHECK,
  103                     slice->sl_start,
  104                     slice->sl_end - slice->sl_start + 1,
  105                     secsize, "%ss.%s", gp->name, slice->sl_name);
  106 
  107                 if (error)
  108                         return (error);
  109         }
  110 
  111         i = 0;
  112         STAILQ_FOREACH(slice, slices, sl_link) {
  113                 error = g_slice_config(gp, i++, G_SLICE_CONFIG_SET,
  114                     slice->sl_start,
  115                     slice->sl_end - slice->sl_start + 1,
  116                     secsize, "%ss.%s", gp->name, slice->sl_name);
  117 
  118                 if (error)
  119                         return (error);
  120         }
  121 
  122         return (0);
  123 }
  124 
  125 static int
  126 g_flashmap_start(struct bio *bp)
  127 {
  128 
  129         return (0);
  130 }
  131 
  132 static void
  133 g_flashmap_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
  134     struct g_consumer *cp __unused, struct g_provider *pp)
  135 {
  136         struct g_slicer *gsp;
  137 
  138         gsp = gp->softc;
  139         g_slice_dumpconf(sb, indent, gp, cp, pp);
  140 }
  141 
  142 static int
  143 g_flashmap_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag,
  144     struct thread *td)
  145 {
  146         struct g_consumer *cp;
  147         struct g_geom *gp;
  148 
  149         if (cmd != NAND_IO_GET_CHIP_PARAM)
  150                 return (ENOIOCTL);
  151 
  152         cp = LIST_FIRST(&pp->geom->consumer);
  153         if (cp == NULL)
  154                 return (ENOIOCTL);
  155         gp = cp->provider->geom;
  156         if (gp->ioctl == NULL)
  157                 return (ENOIOCTL);
  158 
  159         return (gp->ioctl(cp->provider, cmd, data, fflag, td));
  160 }
  161 
  162 
  163 static struct g_geom *
  164 g_flashmap_taste(struct g_class *mp, struct g_provider *pp, int flags)
  165 {
  166         struct g_geom *gp = NULL;
  167         struct g_consumer *cp;
  168         struct g_flashmap_head head;
  169         struct g_flashmap_slice *slice, *slice_temp;
  170         device_t dev;
  171         int nslices, size;
  172 
  173         g_trace(G_T_TOPOLOGY, "flashmap_taste(%s,%s)", mp->name, pp->name);
  174         g_topology_assert();
  175 
  176         if (flags == G_TF_NORMAL &&
  177             strcmp(pp->geom->class->name, G_DISK_CLASS_NAME) != 0)
  178                 return (NULL);
  179 
  180         gp = g_slice_new(mp, FLASH_SLICES_MAX_NUM, pp, &cp, NULL, 0,
  181             g_flashmap_start);
  182         if (gp == NULL)
  183                 return (NULL);
  184 
  185         STAILQ_INIT(&head);
  186 
  187         do {
  188                 size = sizeof(device_t);
  189                 if (g_io_getattr("NAND::device", cp, &size, &dev)) {
  190                         size = sizeof(device_t);
  191                         if (g_io_getattr("CFI::device", cp, &size, &dev))
  192                                 break;
  193                 }
  194 
  195                 nslices = g_flashmap_load(dev, &head);
  196                 if (nslices == 0)
  197                         break;
  198 
  199                 g_flashmap_modify(gp, cp->provider->name,
  200                     cp->provider->sectorsize, &head);
  201         } while (0);
  202 
  203         g_access(cp, -1, 0, 0);
  204 
  205         STAILQ_FOREACH_SAFE(slice, &head, sl_link, slice_temp) {
  206                 free(slice, M_FLASHMAP);
  207         }
  208 
  209         if (LIST_EMPTY(&gp->provider)) {
  210                 g_slice_spoiled(cp);
  211                 return (NULL);
  212         }
  213         return (gp);
  214 }
  215 
  216 static void
  217 g_flashmap_config(struct gctl_req *req, struct g_class *mp, const char *verb)
  218 {
  219 
  220         gctl_error(req, "unknown config verb");
  221 }
  222 
  223 static int
  224 g_flashmap_load(device_t dev, struct g_flashmap_head *head)
  225 {
  226         struct flash_slice *slices;
  227         struct g_flashmap_slice *slice;
  228         uint32_t i, buf_size;
  229         int nslices = 0;
  230 
  231         buf_size = sizeof(struct flash_slice) * FLASH_SLICES_MAX_NUM;
  232         slices = malloc(buf_size, M_FLASHMAP, M_WAITOK | M_ZERO);
  233         if (flash_fill_slices(dev, slices, &nslices) == 0) {
  234                 for (i = 0; i < nslices; i++) {
  235                         slice = malloc(sizeof(struct g_flashmap_slice),
  236                             M_FLASHMAP, M_WAITOK);
  237 
  238                         slice->sl_name = slices[i].label;
  239                         slice->sl_start = slices[i].base;
  240                         slice->sl_end = slices[i].base + slices[i].size - 1;
  241 
  242                         STAILQ_INSERT_TAIL(head, slice, sl_link);
  243                 }
  244         }
  245 
  246         free(slices, M_FLASHMAP);
  247         return (nslices);
  248 }
  249 
  250 static struct g_class g_flashmap_class = {
  251         .name = FLASHMAP_CLASS_NAME,
  252         .version = G_VERSION,
  253         .taste = g_flashmap_taste,
  254         .dumpconf = g_flashmap_dumpconf,
  255         .ioctl = g_flashmap_ioctl,
  256         .ctlreq = g_flashmap_config,
  257 };
  258 
  259 DECLARE_GEOM_CLASS(g_flashmap_class, g_flashmap);

Cache object: 2df6436e3b564824e1613aa3df628685


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