geom_flashmap.c revision 251117
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: head/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 50struct 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 58STAILQ_HEAD(g_flashmap_head, g_flashmap_slice); 59 60static void g_flashmap_print(struct g_flashmap_slice *); 61static int g_flashmap_modify(struct g_geom *, const char *, 62 int, struct g_flashmap_head *); 63static int g_flashmap_start(struct bio *); 64static int g_flashmap_ioctl(struct g_provider *, u_long, void *, 65 int, struct thread *); 66static void g_flashmap_dumpconf(struct sbuf *, const char *, 67 struct g_geom *, struct g_consumer *, struct g_provider *); 68static struct g_geom *g_flashmap_taste(struct g_class *, 69 struct g_provider *, int); 70static void g_flashmap_config(struct gctl_req *, struct g_class *, 71 const char *); 72static int g_flashmap_load(device_t, struct g_flashmap_head *); 73 74MALLOC_DECLARE(M_FLASHMAP); 75MALLOC_DEFINE(M_FLASHMAP, "geom_flashmap", "GEOM flash memory slicer class"); 76 77static void 78g_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 86static int 87g_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 125static int 126g_flashmap_start(struct bio *bp) 127{ 128 129 return (0); 130} 131 132static void 133g_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 142static int 143g_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 163static struct g_geom * 164g_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 216static void 217g_flashmap_config(struct gctl_req *req, struct g_class *mp, const char *verb) 218{ 219 220 gctl_error(req, "unknown config verb"); 221} 222 223static int 224g_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 250static 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 259DECLARE_GEOM_CLASS(g_flashmap_class, g_flashmap); 260