freebsd-dev/sys/geom/geom_flashmap.c

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/*-
* Copyright (c) 2012 Semihalf
* Copyright (c) 2009 Jakub Klama <jakub.klama@uj.edu.pl>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/endian.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/slicer.h>
#include <geom/geom.h>
#include <geom/geom_slice.h>
#include <geom/geom_disk.h>
#include <dev/nand/nand_dev.h>
#define FLASHMAP_CLASS_NAME "Flashmap"
struct g_flashmap_slice {
off_t sl_start;
off_t sl_end;
const char *sl_name;
STAILQ_ENTRY(g_flashmap_slice) sl_link;
};
STAILQ_HEAD(g_flashmap_head, g_flashmap_slice);
static void g_flashmap_print(struct g_flashmap_slice *);
static int g_flashmap_modify(struct g_geom *, const char *,
int, struct g_flashmap_head *);
static int g_flashmap_start(struct bio *);
static int g_flashmap_ioctl(struct g_provider *, u_long, void *,
int, struct thread *);
static void g_flashmap_dumpconf(struct sbuf *, const char *,
struct g_geom *, struct g_consumer *, struct g_provider *);
static struct g_geom *g_flashmap_taste(struct g_class *,
struct g_provider *, int);
static void g_flashmap_config(struct gctl_req *, struct g_class *,
const char *);
static int g_flashmap_load(device_t, struct g_flashmap_head *);
static int (*flash_fill_slices)(device_t, struct flash_slice *, int *) =
fdt_flash_fill_slices;
MALLOC_DECLARE(M_FLASHMAP);
MALLOC_DEFINE(M_FLASHMAP, "geom_flashmap", "GEOM flash memory slicer class");
static void
g_flashmap_print(struct g_flashmap_slice *slice)
{
printf("%08jx-%08jx: %s (%juKB)\n", (uintmax_t)slice->sl_start,
(uintmax_t)slice->sl_end, slice->sl_name,
(uintmax_t)(slice->sl_end - slice->sl_start) / 1024);
}
static int
g_flashmap_modify(struct g_geom *gp, const char *devname, int secsize,
struct g_flashmap_head *slices)
{
struct g_flashmap_slice *slice;
int i, error;
g_topology_assert();
i = 0;
STAILQ_FOREACH(slice, slices, sl_link) {
if (bootverbose) {
printf("%s: slice ", devname);
g_flashmap_print(slice);
}
error = g_slice_config(gp, i++, G_SLICE_CONFIG_CHECK,
slice->sl_start,
slice->sl_end - slice->sl_start + 1,
secsize, "%ss.%s", gp->name, slice->sl_name);
if (error)
return (error);
}
i = 0;
STAILQ_FOREACH(slice, slices, sl_link) {
error = g_slice_config(gp, i++, G_SLICE_CONFIG_SET,
slice->sl_start,
slice->sl_end - slice->sl_start + 1,
secsize, "%ss.%s", gp->name, slice->sl_name);
if (error)
return (error);
}
return (0);
}
static int
g_flashmap_start(struct bio *bp)
{
return (0);
}
static void
g_flashmap_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
struct g_consumer *cp __unused, struct g_provider *pp)
{
struct g_slicer *gsp;
gsp = gp->softc;
g_slice_dumpconf(sb, indent, gp, cp, pp);
}
static int
g_flashmap_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag,
struct thread *td)
{
struct g_consumer *cp;
struct g_geom *gp;
if (cmd != NAND_IO_GET_CHIP_PARAM)
return (ENOIOCTL);
cp = LIST_FIRST(&pp->geom->consumer);
if (cp == NULL)
return (ENOIOCTL);
gp = cp->provider->geom;
if (gp->ioctl == NULL)
return (ENOIOCTL);
return (gp->ioctl(cp->provider, cmd, data, fflag, td));
}
static struct g_geom *
g_flashmap_taste(struct g_class *mp, struct g_provider *pp, int flags)
{
struct g_geom *gp = NULL;
struct g_consumer *cp;
struct g_flashmap_head head;
struct g_flashmap_slice *slice, *slice_temp;
device_t dev;
int nslices, size;
g_trace(G_T_TOPOLOGY, "flashmap_taste(%s,%s)", mp->name, pp->name);
g_topology_assert();
if (flags == G_TF_NORMAL &&
strcmp(pp->geom->class->name, G_DISK_CLASS_NAME) != 0)
return (NULL);
gp = g_slice_new(mp, FLASH_SLICES_MAX_NUM, pp, &cp, NULL, 0,
g_flashmap_start);
if (gp == NULL)
return (NULL);
STAILQ_INIT(&head);
do {
size = sizeof(device_t);
if (g_io_getattr("NAND::device", cp, &size, &dev)) {
size = sizeof(device_t);
if (g_io_getattr("CFI::device", cp, &size, &dev)) {
size = sizeof(device_t);
if (g_io_getattr("SPI::device", cp, &size,
&dev))
break;
}
}
nslices = g_flashmap_load(dev, &head);
if (nslices == 0)
break;
g_flashmap_modify(gp, cp->provider->name,
cp->provider->sectorsize, &head);
} while (0);
g_access(cp, -1, 0, 0);
STAILQ_FOREACH_SAFE(slice, &head, sl_link, slice_temp) {
free(slice, M_FLASHMAP);
}
if (LIST_EMPTY(&gp->provider)) {
g_slice_spoiled(cp);
return (NULL);
}
return (gp);
}
static void
g_flashmap_config(struct gctl_req *req, struct g_class *mp, const char *verb)
{
gctl_error(req, "unknown config verb");
}
static int
g_flashmap_load(device_t dev, struct g_flashmap_head *head)
{
struct flash_slice *slices;
struct g_flashmap_slice *slice;
uint32_t i, buf_size;
int nslices = 0;
buf_size = sizeof(struct flash_slice) * FLASH_SLICES_MAX_NUM;
slices = malloc(buf_size, M_FLASHMAP, M_WAITOK | M_ZERO);
if (flash_fill_slices &&
flash_fill_slices(dev, slices, &nslices) == 0) {
for (i = 0; i < nslices; i++) {
slice = malloc(sizeof(struct g_flashmap_slice),
M_FLASHMAP, M_WAITOK);
slice->sl_name = slices[i].label;
slice->sl_start = slices[i].base;
slice->sl_end = slices[i].base + slices[i].size - 1;
STAILQ_INSERT_TAIL(head, slice, sl_link);
}
}
free(slices, M_FLASHMAP);
return (nslices);
}
void flash_register_slicer(int (*slicer)(device_t, struct flash_slice *, int *))
{
flash_fill_slices = slicer;
}
static struct g_class g_flashmap_class = {
.name = FLASHMAP_CLASS_NAME,
.version = G_VERSION,
.taste = g_flashmap_taste,
.dumpconf = g_flashmap_dumpconf,
.ioctl = g_flashmap_ioctl,
.ctlreq = g_flashmap_config,
};
DECLARE_GEOM_CLASS(g_flashmap_class, g_flashmap);