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: stable/10/sys/geom/geom_flashmap.c 320168 2017-06-20 19:59:57Z marius $"); 30 31#include <sys/param.h> 32#include <sys/systm.h> 33#include <sys/kernel.h> 34#include <sys/malloc.h> 35#include <sys/lock.h> 36#include <sys/mutex.h> 37#include <sys/proc.h> 38#include <sys/slicer.h> 39 40#include <geom/geom.h> 41#include <geom/geom_slice.h> 42#include <geom/geom_disk.h> 43 44#include <dev/nand/nand_dev.h> 45 46#define FLASHMAP_CLASS_NAME "Flashmap" 47 48struct g_flashmap_slice { 49 off_t sl_start; 50 off_t sl_end; 51 const char *sl_name; 52 53 STAILQ_ENTRY(g_flashmap_slice) sl_link; 54}; 55 56STAILQ_HEAD(g_flashmap_head, g_flashmap_slice); 57 58static struct { 59 const char *type; 60 flash_slicer_t slicer; 61} g_flashmap_slicers[] = { 62 { "NAND::device", NULL }, 63 { "CFI::device", NULL }, 64 { "SPI::device", NULL }, 65 { "MMC::device", NULL } 66}; 67 68static g_ioctl_t g_flashmap_ioctl; 69static g_taste_t g_flashmap_taste; 70 71static int g_flashmap_load(device_t dev, struct g_provider *pp, 72 flash_slicer_t slicer, struct g_flashmap_head *head); 73static int g_flashmap_modify(struct g_geom *gp, const char *devname, 74 int secsize, struct g_flashmap_head *slices); 75static void g_flashmap_print(struct g_flashmap_slice *slice); 76 77MALLOC_DECLARE(M_FLASHMAP); 78MALLOC_DEFINE(M_FLASHMAP, "geom_flashmap", "GEOM flash memory slicer class"); 79 80static void 81g_flashmap_print(struct g_flashmap_slice *slice) 82{ 83 84 printf("%08jx-%08jx: %s (%juKB)\n", (uintmax_t)slice->sl_start, 85 (uintmax_t)slice->sl_end, slice->sl_name, 86 (uintmax_t)(slice->sl_end - slice->sl_start) / 1024); 87} 88 89static int 90g_flashmap_modify(struct g_geom *gp, const char *devname, int secsize, 91 struct g_flashmap_head *slices) 92{ 93 struct g_flashmap_slice *slice; 94 int i, error; 95 96 g_topology_assert(); 97 98 i = 0; 99 STAILQ_FOREACH(slice, slices, sl_link) { 100 if (bootverbose) { 101 printf("%s: slice ", devname); 102 g_flashmap_print(slice); 103 } 104 105 error = g_slice_config(gp, i++, G_SLICE_CONFIG_CHECK, 106 slice->sl_start, 107 slice->sl_end - slice->sl_start + 1, 108 secsize, FLASH_SLICES_FMT, gp->name, slice->sl_name); 109 110 if (error) 111 return (error); 112 } 113 114 i = 0; 115 STAILQ_FOREACH(slice, slices, sl_link) { 116 error = g_slice_config(gp, i++, G_SLICE_CONFIG_SET, 117 slice->sl_start, 118 slice->sl_end - slice->sl_start + 1, 119 secsize, "%ss.%s", gp->name, slice->sl_name); 120 121 if (error) 122 return (error); 123 } 124 125 return (0); 126} 127 128static int 129g_flashmap_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, 130 struct thread *td) 131{ 132 struct g_consumer *cp; 133 struct g_geom *gp; 134 135 if (cmd != NAND_IO_GET_CHIP_PARAM) 136 return (ENOIOCTL); 137 138 cp = LIST_FIRST(&pp->geom->consumer); 139 if (cp == NULL) 140 return (ENOIOCTL); 141 gp = cp->provider->geom; 142 if (gp->ioctl == NULL) 143 return (ENOIOCTL); 144 145 return (gp->ioctl(cp->provider, cmd, data, fflag, td)); 146} 147 148static struct g_geom * 149g_flashmap_taste(struct g_class *mp, struct g_provider *pp, int flags) 150{ 151 struct g_geom *gp; 152 struct g_consumer *cp; 153 struct g_flashmap_head head; 154 struct g_flashmap_slice *slice, *slice_temp; 155 flash_slicer_t slicer; 156 device_t dev; 157 int i, size; 158 159 g_trace(G_T_TOPOLOGY, "flashmap_taste(%s,%s)", mp->name, pp->name); 160 g_topology_assert(); 161 162 if (flags == G_TF_NORMAL && 163 strcmp(pp->geom->class->name, G_DISK_CLASS_NAME) != 0) 164 return (NULL); 165 166 gp = g_slice_new(mp, FLASH_SLICES_MAX_NUM, pp, &cp, NULL, 0, NULL); 167 if (gp == NULL) 168 return (NULL); 169 170 STAILQ_INIT(&head); 171 172 do { 173 slicer = NULL; 174 for (i = 0; i < nitems(g_flashmap_slicers); i++) { 175 size = sizeof(device_t); 176 if (g_io_getattr(g_flashmap_slicers[i].type, cp, 177 &size, &dev) == 0) { 178 slicer = g_flashmap_slicers[i].slicer; 179 break; 180 } 181 } 182 if (slicer == NULL) 183 break; 184 185 if (g_flashmap_load(dev, pp, slicer, &head) == 0) 186 break; 187 188 g_flashmap_modify(gp, cp->provider->name, 189 cp->provider->sectorsize, &head); 190 } while (0); 191 192 g_access(cp, -1, 0, 0); 193 194 STAILQ_FOREACH_SAFE(slice, &head, sl_link, slice_temp) 195 free(slice, M_FLASHMAP); 196 197 if (LIST_EMPTY(&gp->provider)) { 198 g_slice_spoiled(cp); 199 return (NULL); 200 } 201 return (gp); 202} 203 204static int 205g_flashmap_load(device_t dev, struct g_provider *pp, flash_slicer_t slicer, 206 struct g_flashmap_head *head) 207{ 208 struct flash_slice *slices; 209 struct g_flashmap_slice *slice; 210 int i, nslices = 0; 211 212 slices = malloc(sizeof(struct flash_slice) * FLASH_SLICES_MAX_NUM, 213 M_FLASHMAP, M_WAITOK | M_ZERO); 214 if (slicer(dev, pp->name, slices, &nslices) == 0) { 215 for (i = 0; i < nslices; i++) { 216 slice = malloc(sizeof(struct g_flashmap_slice), 217 M_FLASHMAP, M_WAITOK); 218 219 slice->sl_name = slices[i].label; 220 slice->sl_start = slices[i].base; 221 slice->sl_end = slices[i].base + slices[i].size - 1; 222 223 STAILQ_INSERT_TAIL(head, slice, sl_link); 224 } 225 } 226 227 free(slices, M_FLASHMAP); 228 return (nslices); 229} 230 231void flash_register_slicer(flash_slicer_t slicer, u_int type, bool force) 232{ 233 234 DROP_GIANT(); 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 PICKUP_GIANT(); 240} 241 242static struct g_class g_flashmap_class = { 243 .name = FLASHMAP_CLASS_NAME, 244 .version = G_VERSION, 245 .taste = g_flashmap_taste, 246 .ioctl = g_flashmap_ioctl, 247}; 248 249DECLARE_GEOM_CLASS(g_flashmap_class, g_flashmap); 250MODULE_VERSION(g_flashmap, 0); 251