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/11.0/sys/geom/geom_flashmap.c 294616 2016-01-23 05:26:29Z adrian $");
   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 static int (*flash_fill_slices)(device_t, struct flash_slice *, int *) =
   74     fdt_flash_fill_slices;
   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, "%ss.%s", 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_start(struct bio *bp)
  129 {
  130 
  131         return (0);
  132 }
  133 
  134 static void
  135 g_flashmap_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
  136     struct g_consumer *cp __unused, struct g_provider *pp)
  137 {
  138         struct g_slicer *gsp;
  139 
  140         gsp = gp->softc;
  141         g_slice_dumpconf(sb, indent, gp, cp, pp);
  142 }
  143 
  144 static int
  145 g_flashmap_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag,
  146     struct thread *td)
  147 {
  148         struct g_consumer *cp;
  149         struct g_geom *gp;
  150 
  151         if (cmd != NAND_IO_GET_CHIP_PARAM)
  152                 return (ENOIOCTL);
  153 
  154         cp = LIST_FIRST(&pp->geom->consumer);
  155         if (cp == NULL)
  156                 return (ENOIOCTL);
  157         gp = cp->provider->geom;
  158         if (gp->ioctl == NULL)
  159                 return (ENOIOCTL);
  160 
  161         return (gp->ioctl(cp->provider, cmd, data, fflag, td));
  162 }
  163 
  164 
  165 static struct g_geom *
  166 g_flashmap_taste(struct g_class *mp, struct g_provider *pp, int flags)
  167 {
  168         struct g_geom *gp = NULL;
  169         struct g_consumer *cp;
  170         struct g_flashmap_head head;
  171         struct g_flashmap_slice *slice, *slice_temp;
  172         device_t dev;
  173         int nslices, size;
  174 
  175         g_trace(G_T_TOPOLOGY, "flashmap_taste(%s,%s)", mp->name, pp->name);
  176         g_topology_assert();
  177 
  178         if (flags == G_TF_NORMAL &&
  179             strcmp(pp->geom->class->name, G_DISK_CLASS_NAME) != 0)
  180                 return (NULL);
  181 
  182         gp = g_slice_new(mp, FLASH_SLICES_MAX_NUM, pp, &cp, NULL, 0,
  183             g_flashmap_start);
  184         if (gp == NULL)
  185                 return (NULL);
  186 
  187         STAILQ_INIT(&head);
  188 
  189         do {
  190                 size = sizeof(device_t);
  191                 if (g_io_getattr("NAND::device", cp, &size, &dev)) {
  192                         size = sizeof(device_t);
  193                         if (g_io_getattr("CFI::device", cp, &size, &dev)) {
  194                                 size = sizeof(device_t);
  195                                 if (g_io_getattr("SPI::device", cp, &size,
  196                                     &dev))
  197                                         break;
  198                         }
  199                 }
  200 
  201                 nslices = g_flashmap_load(dev, &head);
  202                 if (nslices == 0)
  203                         break;
  204 
  205                 g_flashmap_modify(gp, cp->provider->name,
  206                     cp->provider->sectorsize, &head);
  207         } while (0);
  208 
  209         g_access(cp, -1, 0, 0);
  210 
  211         STAILQ_FOREACH_SAFE(slice, &head, sl_link, slice_temp) {
  212                 free(slice, M_FLASHMAP);
  213         }
  214 
  215         if (LIST_EMPTY(&gp->provider)) {
  216                 g_slice_spoiled(cp);
  217                 return (NULL);
  218         }
  219         return (gp);
  220 }
  221 
  222 static void
  223 g_flashmap_config(struct gctl_req *req, struct g_class *mp, const char *verb)
  224 {
  225 
  226         gctl_error(req, "unknown config verb");
  227 }
  228 
  229 static int
  230 g_flashmap_load(device_t dev, struct g_flashmap_head *head)
  231 {
  232         struct flash_slice *slices;
  233         struct g_flashmap_slice *slice;
  234         uint32_t i, buf_size;
  235         int nslices = 0;
  236 
  237         buf_size = sizeof(struct flash_slice) * FLASH_SLICES_MAX_NUM;
  238         slices = malloc(buf_size, M_FLASHMAP, M_WAITOK | M_ZERO);
  239         if (flash_fill_slices &&
  240             flash_fill_slices(dev, slices, &nslices) == 0) {
  241                 for (i = 0; i < nslices; i++) {
  242                         slice = malloc(sizeof(struct g_flashmap_slice),
  243                             M_FLASHMAP, M_WAITOK);
  244 
  245                         slice->sl_name = slices[i].label;
  246                         slice->sl_start = slices[i].base;
  247                         slice->sl_end = slices[i].base + slices[i].size - 1;
  248 
  249                         STAILQ_INSERT_TAIL(head, slice, sl_link);
  250                 }
  251         }
  252 
  253         free(slices, M_FLASHMAP);
  254         return (nslices);
  255 }
  256 
  257 void flash_register_slicer(int (*slicer)(device_t, struct flash_slice *, int *))
  258 {
  259 
  260         flash_fill_slices = slicer;
  261 }
  262 
  263 static struct g_class g_flashmap_class = {
  264         .name = FLASHMAP_CLASS_NAME,
  265         .version = G_VERSION,
  266         .taste = g_flashmap_taste,
  267         .dumpconf = g_flashmap_dumpconf,
  268         .ioctl = g_flashmap_ioctl,
  269         .ctlreq = g_flashmap_config,
  270 };
  271 
  272 DECLARE_GEOM_CLASS(g_flashmap_class, g_flashmap);

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

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