ld_sdmmc.c revision 1.30
1 /* $NetBSD: ld_sdmmc.c,v 1.30 2017/07/10 10:35:07 mlelstv Exp $ */ 2 3 /* 4 * Copyright (c) 2008 KIYOHARA Takashi 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 * 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: ld_sdmmc.c,v 1.30 2017/07/10 10:35:07 mlelstv Exp $"); 32 33 #ifdef _KERNEL_OPT 34 #include "opt_sdmmc.h" 35 #endif 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/device.h> 41 #include <sys/buf.h> 42 #include <sys/bufq.h> 43 #include <sys/bus.h> 44 #include <sys/endian.h> 45 #include <sys/dkio.h> 46 #include <sys/disk.h> 47 #include <sys/disklabel.h> 48 #include <sys/kthread.h> 49 #include <sys/syslog.h> 50 #include <sys/module.h> 51 #include <sys/pcq.h> 52 53 #include <dev/ldvar.h> 54 55 #include <dev/sdmmc/sdmmcvar.h> 56 57 #include "ioconf.h" 58 59 #ifdef LD_SDMMC_DEBUG 60 #define DPRINTF(s) printf s 61 #else 62 #define DPRINTF(s) /**/ 63 #endif 64 65 #define LD_SDMMC_IORETRIES 5 /* number of retries before giving up */ 66 #define RECOVERYTIME hz/2 /* time to wait before retrying a cmd */ 67 68 struct ld_sdmmc_softc; 69 70 struct ld_sdmmc_task { 71 struct sdmmc_task task; 72 73 struct ld_sdmmc_softc *task_sc; 74 struct buf *task_bp; 75 int task_retries; /* number of xfer retry */ 76 struct callout task_restart_ch; 77 }; 78 79 struct ld_sdmmc_softc { 80 struct ld_softc sc_ld; 81 int sc_hwunit; 82 83 struct sdmmc_function *sc_sf; 84 #define LD_SDMMC_MAXQUEUECNT 4 85 struct ld_sdmmc_task sc_task[LD_SDMMC_MAXQUEUECNT]; 86 pcq_t *sc_freeq; 87 }; 88 89 static int ld_sdmmc_match(device_t, cfdata_t, void *); 90 static void ld_sdmmc_attach(device_t, device_t, void *); 91 static int ld_sdmmc_detach(device_t, int); 92 93 static int ld_sdmmc_dump(struct ld_softc *, void *, int, int); 94 static int ld_sdmmc_start(struct ld_softc *, struct buf *); 95 static void ld_sdmmc_restart(void *); 96 static int ld_sdmmc_discard(struct ld_softc *, off_t, off_t); 97 98 static void ld_sdmmc_doattach(void *); 99 static void ld_sdmmc_dobio(void *); 100 101 CFATTACH_DECL_NEW(ld_sdmmc, sizeof(struct ld_sdmmc_softc), 102 ld_sdmmc_match, ld_sdmmc_attach, ld_sdmmc_detach, NULL); 103 104 105 /* ARGSUSED */ 106 static int 107 ld_sdmmc_match(device_t parent, cfdata_t match, void *aux) 108 { 109 struct sdmmc_softc *sdmsc = device_private(parent); 110 111 if (ISSET(sdmsc->sc_flags, SMF_MEM_MODE)) 112 return 1; 113 return 0; 114 } 115 116 /* ARGSUSED */ 117 static void 118 ld_sdmmc_attach(device_t parent, device_t self, void *aux) 119 { 120 struct ld_sdmmc_softc *sc = device_private(self); 121 struct sdmmc_attach_args *sa = aux; 122 struct ld_softc *ld = &sc->sc_ld; 123 struct ld_sdmmc_task *task; 124 struct lwp *lwp; 125 int i; 126 127 ld->sc_dv = self; 128 129 aprint_normal(": <0x%02x:0x%04x:%s:0x%02x:0x%08x:0x%03x>\n", 130 sa->sf->cid.mid, sa->sf->cid.oid, sa->sf->cid.pnm, 131 sa->sf->cid.rev, sa->sf->cid.psn, sa->sf->cid.mdt); 132 aprint_naive("\n"); 133 134 const int ntask = __arraycount(sc->sc_task); 135 sc->sc_freeq = pcq_create(ntask, KM_SLEEP); 136 for (i = 0; i < ntask; i++) { 137 task = &sc->sc_task[i]; 138 task->task_sc = sc; 139 callout_init(&task->task_restart_ch, CALLOUT_MPSAFE); 140 pcq_put(sc->sc_freeq, task); 141 } 142 143 sc->sc_hwunit = 0; /* always 0? */ 144 sc->sc_sf = sa->sf; 145 146 ld->sc_flags = LDF_ENABLED; 147 ld->sc_secperunit = sc->sc_sf->csd.capacity; 148 ld->sc_secsize = SDMMC_SECTOR_SIZE; 149 ld->sc_maxxfer = MAXPHYS; 150 ld->sc_maxqueuecnt = LD_SDMMC_MAXQUEUECNT; 151 ld->sc_dump = ld_sdmmc_dump; 152 ld->sc_start = ld_sdmmc_start; 153 ld->sc_discard = ld_sdmmc_discard; 154 155 /* 156 * Defer attachment of ld + disk subsystem to a thread. 157 * 158 * This is necessary because wedge autodiscover needs to 159 * open and call into the ld driver, which could deadlock 160 * when the sdmmc driver isn't ready in early bootstrap. 161 * 162 * Don't mark thread as MPSAFE to keep aprint output sane. 163 */ 164 config_pending_incr(self); 165 if (kthread_create(PRI_NONE, 0, NULL, 166 ld_sdmmc_doattach, sc, &lwp, "%sattach", device_xname(self))) { 167 aprint_error_dev(self, "couldn't create thread\n"); 168 } 169 } 170 171 static void 172 ld_sdmmc_doattach(void *arg) 173 { 174 struct ld_sdmmc_softc *sc = (struct ld_sdmmc_softc *)arg; 175 struct ld_softc *ld = &sc->sc_ld; 176 struct sdmmc_softc *ssc = device_private(device_parent(ld->sc_dv)); 177 178 ldattach(ld, BUFQ_DISK_DEFAULT_STRAT); 179 aprint_normal_dev(ld->sc_dv, "%d-bit width,", sc->sc_sf->width); 180 if (ssc->sc_transfer_mode != NULL) 181 aprint_normal(" %s,", ssc->sc_transfer_mode); 182 if ((ssc->sc_busclk / 1000) != 0) 183 aprint_normal(" %u.%03u MHz\n", 184 ssc->sc_busclk / 1000, ssc->sc_busclk % 1000); 185 else 186 aprint_normal(" %u KHz\n", ssc->sc_busclk % 1000); 187 config_pending_decr(ld->sc_dv); 188 kthread_exit(0); 189 } 190 191 static int 192 ld_sdmmc_detach(device_t dev, int flags) 193 { 194 struct ld_sdmmc_softc *sc = device_private(dev); 195 struct ld_softc *ld = &sc->sc_ld; 196 int rv, i; 197 198 if ((rv = ldbegindetach(ld, flags)) != 0) 199 return rv; 200 ldenddetach(ld); 201 202 for (i = 0; i < __arraycount(sc->sc_task); i++) 203 callout_destroy(&sc->sc_task[i].task_restart_ch); 204 205 pcq_destroy(sc->sc_freeq); 206 207 return 0; 208 } 209 210 static int 211 ld_sdmmc_start(struct ld_softc *ld, struct buf *bp) 212 { 213 struct ld_sdmmc_softc *sc = device_private(ld->sc_dv); 214 struct ld_sdmmc_task *task = pcq_get(sc->sc_freeq); 215 216 if (task == NULL) 217 return EAGAIN; 218 219 task->task_bp = bp; 220 task->task_retries = 0; 221 sdmmc_init_task(&task->task, ld_sdmmc_dobio, task); 222 223 sdmmc_add_task(sc->sc_sf->sc, &task->task); 224 225 return 0; 226 } 227 228 static void 229 ld_sdmmc_restart(void *arg) 230 { 231 struct ld_sdmmc_task *task = (struct ld_sdmmc_task *)arg; 232 struct ld_sdmmc_softc *sc = task->task_sc; 233 struct buf *bp = task->task_bp; 234 235 bp->b_resid = bp->b_bcount; 236 237 sdmmc_add_task(sc->sc_sf->sc, &task->task); 238 } 239 240 static void 241 ld_sdmmc_dobio(void *arg) 242 { 243 struct ld_sdmmc_task *task = (struct ld_sdmmc_task *)arg; 244 struct ld_sdmmc_softc *sc = task->task_sc; 245 struct buf *bp = task->task_bp; 246 int error; 247 248 /* 249 * I/O operation 250 */ 251 DPRINTF(("%s: I/O operation (dir=%s, blkno=0x%jx, bcnt=0x%x)\n", 252 device_xname(sc->sc_ld.sc_dv), bp->b_flags & B_READ ? "IN" : "OUT", 253 bp->b_rawblkno, bp->b_bcount)); 254 255 /* is everything done in terms of blocks? */ 256 if (bp->b_rawblkno >= sc->sc_sf->csd.capacity) { 257 /* trying to read or write past end of device */ 258 aprint_error_dev(sc->sc_ld.sc_dv, 259 "blkno 0x%" PRIu64 " exceeds capacity %d\n", 260 bp->b_rawblkno, sc->sc_sf->csd.capacity); 261 bp->b_error = EINVAL; 262 bp->b_resid = bp->b_bcount; 263 264 goto done; 265 } 266 267 if (bp->b_flags & B_READ) 268 error = sdmmc_mem_read_block(sc->sc_sf, bp->b_rawblkno, 269 bp->b_data, bp->b_bcount); 270 else 271 error = sdmmc_mem_write_block(sc->sc_sf, bp->b_rawblkno, 272 bp->b_data, bp->b_bcount); 273 if (error) { 274 if (task->task_retries < LD_SDMMC_IORETRIES) { 275 struct dk_softc *dksc = &sc->sc_ld.sc_dksc; 276 struct cfdriver *cd = device_cfdriver(dksc->sc_dev); 277 278 diskerr(bp, cd->cd_name, "error", LOG_PRINTF, 0, 279 dksc->sc_dkdev.dk_label); 280 printf(", retrying\n"); 281 task->task_retries++; 282 callout_reset(&task->task_restart_ch, RECOVERYTIME, 283 ld_sdmmc_restart, task); 284 return; 285 } 286 bp->b_error = error; 287 bp->b_resid = bp->b_bcount; 288 } else { 289 bp->b_resid = 0; 290 } 291 292 done: 293 pcq_put(sc->sc_freeq, task); 294 295 lddone(&sc->sc_ld, bp); 296 } 297 298 static int 299 ld_sdmmc_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 300 { 301 struct ld_sdmmc_softc *sc = device_private(ld->sc_dv); 302 303 return sdmmc_mem_write_block(sc->sc_sf, blkno, data, 304 blkcnt * ld->sc_secsize); 305 } 306 307 static int 308 ld_sdmmc_discard(struct ld_softc *ld, off_t pos, off_t len) 309 { 310 struct ld_sdmmc_softc *sc = device_private(ld->sc_dv); 311 312 return sdmmc_mem_discard(sc->sc_sf, pos, len); 313 } 314 315 MODULE(MODULE_CLASS_DRIVER, ld_sdmmc, "ld"); 316 317 #ifdef _MODULE 318 /* 319 * XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd" 320 * XXX it will be defined in the common-code module 321 */ 322 #undef CFDRIVER_DECL 323 #define CFDRIVER_DECL(name, class, attr) 324 #include "ioconf.c" 325 #endif 326 327 static int 328 ld_sdmmc_modcmd(modcmd_t cmd, void *opaque) 329 { 330 #ifdef _MODULE 331 /* 332 * We ignore the cfdriver_vec[] that ioconf provides, since 333 * the cfdrivers are attached already. 334 */ 335 static struct cfdriver * const no_cfdriver_vec[] = { NULL }; 336 #endif 337 int error = 0; 338 339 #ifdef _MODULE 340 switch (cmd) { 341 case MODULE_CMD_INIT: 342 error = config_init_component(no_cfdriver_vec, 343 cfattach_ioconf_ld_sdmmc, cfdata_ioconf_ld_sdmmc); 344 break; 345 case MODULE_CMD_FINI: 346 error = config_fini_component(no_cfdriver_vec, 347 cfattach_ioconf_ld_sdmmc, cfdata_ioconf_ld_sdmmc); 348 break; 349 default: 350 error = ENOTTY; 351 break; 352 } 353 #endif 354 355 return error; 356 } 357
Indexes created Sun Oct 19 02:09:48 GMT 2025