scsipi_ioctl.c revision 1.20
1 /* $NetBSD: scsipi_ioctl.c,v 1.20 1996/02/14 21:47:22 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Charles Hannum. 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 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Charles Hannum. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Contributed by HD Associates (hd (at) world.std.com). 34 * Copyright (c) 1992, 1993 HD Associates 35 * 36 * Berkeley style copyright. 37 */ 38 39 #include <sys/types.h> 40 #include <sys/errno.h> 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/malloc.h> 44 #include <sys/buf.h> 45 #include <sys/proc.h> 46 #include <sys/device.h> 47 48 #include <scsi/scsi_all.h> 49 #include <scsi/scsiconf.h> 50 #include <sys/scsiio.h> 51 52 struct scsi_ioctl { 53 LIST_ENTRY(scsi_ioctl) si_list; 54 struct buf si_bp; 55 struct uio si_uio; 56 struct iovec si_iov; 57 scsireq_t si_screq; 58 struct scsi_link *si_sc_link; 59 }; 60 61 LIST_HEAD(, scsi_ioctl) si_head; 62 63 struct scsi_ioctl *si_get __P((void)); 64 void si_free __P((struct scsi_ioctl *)); 65 struct scsi_ioctl *si_find __P((struct buf *)); 66 void scsistrategy __P((struct buf *)); 67 68 struct scsi_ioctl * 69 si_get() 70 { 71 struct scsi_ioctl *si; 72 int s; 73 74 si = malloc(sizeof(struct scsi_ioctl), M_TEMP, M_WAITOK); 75 bzero(si, sizeof(struct scsi_ioctl)); 76 s = splbio(); 77 LIST_INSERT_HEAD(&si_head, si, si_list); 78 splx(s); 79 return (si); 80 } 81 82 void 83 si_free(si) 84 struct scsi_ioctl *si; 85 { 86 int s; 87 88 s = splbio(); 89 LIST_REMOVE(si, si_list); 90 splx(s); 91 free(si, M_TEMP); 92 } 93 94 struct scsi_ioctl * 95 si_find(bp) 96 struct buf *bp; 97 { 98 struct scsi_ioctl *si; 99 int s; 100 101 s = splbio(); 102 for (si = si_head.lh_first; si != 0; si = si->si_list.le_next) 103 if (bp == &si->si_bp) 104 break; 105 splx(s); 106 return (si); 107 } 108 109 /* 110 * We let the user interpret his own sense in the generic scsi world. 111 * This routine is called at interrupt time if the SCSI_USER bit was set 112 * in the flags passed to scsi_scsi_cmd(). No other completion processing 113 * takes place, even if we are running over another device driver. 114 * The lower level routines that call us here, will free the xs and restart 115 * the device's queue if such exists. 116 */ 117 void 118 scsi_user_done(xs) 119 struct scsi_xfer *xs; 120 { 121 struct buf *bp; 122 struct scsi_ioctl *si; 123 scsireq_t *screq; 124 struct scsi_link *sc_link; 125 126 bp = xs->bp; 127 if (!bp) { /* ALL user requests must have a buf */ 128 sc_print_addr(xs->sc_link); 129 printf("User command with no buf\n"); 130 return; 131 } 132 si = si_find(bp); 133 if (!si) { 134 sc_print_addr(xs->sc_link); 135 printf("User command with no ioctl\n"); 136 return; 137 } 138 screq = &si->si_screq; 139 sc_link = si->si_sc_link; 140 SC_DEBUG(xs->sc_link, SDEV_DB2, ("user-done\n")); 141 142 screq->retsts = 0; 143 screq->status = xs->status; 144 switch (xs->error) { 145 case XS_NOERROR: 146 SC_DEBUG(sc_link, SDEV_DB3, ("no error\n")); 147 screq->datalen_used = xs->datalen - xs->resid; /* probably rubbish */ 148 screq->retsts = SCCMD_OK; 149 break; 150 case XS_SENSE: 151 SC_DEBUG(sc_link, SDEV_DB3, ("have sense\n")); 152 screq->senselen_used = min(sizeof(xs->sense), SENSEBUFLEN); 153 bcopy(&xs->sense, screq->sense, screq->senselen); 154 screq->retsts = SCCMD_SENSE; 155 break; 156 case XS_DRIVER_STUFFUP: 157 sc_print_addr(sc_link); 158 printf("host adapter code inconsistency\n"); 159 screq->retsts = SCCMD_UNKNOWN; 160 break; 161 case XS_TIMEOUT: 162 SC_DEBUG(sc_link, SDEV_DB3, ("timeout\n")); 163 screq->retsts = SCCMD_TIMEOUT; 164 break; 165 case XS_BUSY: 166 SC_DEBUG(sc_link, SDEV_DB3, ("busy\n")); 167 screq->retsts = SCCMD_BUSY; 168 break; 169 default: 170 sc_print_addr(sc_link); 171 printf("unknown error category from host adapter code\n"); 172 screq->retsts = SCCMD_UNKNOWN; 173 break; 174 } 175 biodone(bp); /* we're waiting on it in scsi_strategy() */ 176 } 177 178 179 /* Pseudo strategy function 180 * Called by scsi_do_ioctl() via physio/physstrat if there is to 181 * be data transfered, and directly if there is no data transfer. 182 * 183 * Should I reorganize this so it returns to physio instead 184 * of sleeping in scsiio_scsi_cmd? Is there any advantage, other 185 * than avoiding the probable duplicate wakeup in iodone? [PD] 186 * 187 * No, seems ok to me... [JRE] 188 * (I don't see any duplicate wakeups) 189 * 190 * Can't be used with block devices or raw_read/raw_write directly 191 * from the cdevsw/bdevsw tables because they couldn't have added 192 * the screq structure. [JRE] 193 */ 194 void 195 scsistrategy(bp) 196 struct buf *bp; 197 { 198 struct scsi_ioctl *si; 199 scsireq_t *screq; 200 struct scsi_link *sc_link; 201 int error; 202 int flags = 0; 203 int s; 204 205 si = si_find(bp); 206 if (!si) { 207 printf("user_strat: No ioctl\n"); 208 error = EINVAL; 209 goto bad; 210 } 211 screq = &si->si_screq; 212 sc_link = si->si_sc_link; 213 SC_DEBUG(sc_link, SDEV_DB2, ("user_strategy\n")); 214 215 /* 216 * We're in trouble if physio tried to break up the transfer. 217 */ 218 if (bp->b_bcount != screq->datalen) { 219 sc_print_addr(sc_link); 220 printf("physio split the request.. cannot proceed\n"); 221 error = EIO; 222 goto bad; 223 } 224 225 if (screq->timeout == 0) { 226 error = EINVAL; 227 goto bad; 228 } 229 230 if (screq->cmdlen > sizeof(struct scsi_generic)) { 231 sc_print_addr(sc_link); 232 printf("cmdlen too big\n"); 233 error = EFAULT; 234 goto bad; 235 } 236 237 if (screq->flags & SCCMD_READ) 238 flags |= SCSI_DATA_IN; 239 if (screq->flags & SCCMD_WRITE) 240 flags |= SCSI_DATA_OUT; 241 if (screq->flags & SCCMD_TARGET) 242 flags |= SCSI_TARGET; 243 if (screq->flags & SCCMD_ESCAPE) 244 flags |= SCSI_ESCAPE; 245 246 error = scsi_scsi_cmd(sc_link, (struct scsi_generic *)screq->cmd, 247 screq->cmdlen, (u_char *)bp->b_data, screq->datalen, 248 0, /* user must do the retries *//* ignored */ 249 screq->timeout, bp, flags | SCSI_USER | SCSI_NOSLEEP); 250 251 /* because there is a bp, scsi_scsi_cmd will return immediatly */ 252 if (error) 253 goto bad; 254 255 SC_DEBUG(sc_link, SDEV_DB3, ("about to sleep\n")); 256 s = splbio(); 257 while ((bp->b_flags & B_DONE) == 0) 258 tsleep(bp, PRIBIO, "scistr", 0); 259 splx(s); 260 SC_DEBUG(sc_link, SDEV_DB3, ("back from sleep\n")); 261 262 return; 263 264 bad: 265 bp->b_flags |= B_ERROR; 266 bp->b_error = error; 267 biodone(bp); 268 } 269 270 /* 271 * Something (e.g. another driver) has called us 272 * with an sc_link for a target/lun/adapter, and a scsi 273 * specific ioctl to perform, better try. 274 * If user-level type command, we must still be running 275 * in the context of the calling process 276 */ 277 int 278 scsi_do_ioctl(sc_link, dev, cmd, addr, flag, p) 279 struct scsi_link *sc_link; 280 dev_t dev; 281 u_long cmd; 282 caddr_t addr; 283 int flag; 284 struct proc *p; 285 { 286 int error; 287 288 SC_DEBUG(sc_link, SDEV_DB2, ("scsi_do_ioctl(0x%lx)\n", cmd)); 289 290 switch(cmd) { 291 case SCIOCCOMMAND: { 292 scsireq_t *screq = (scsireq_t *)addr; 293 struct scsi_ioctl *si; 294 int len; 295 296 si = si_get(); 297 si->si_screq = *screq; 298 si->si_sc_link = sc_link; 299 len = screq->datalen; 300 if (len) { 301 si->si_iov.iov_base = screq->databuf; 302 si->si_iov.iov_len = len; 303 si->si_uio.uio_iov = &si->si_iov; 304 si->si_uio.uio_iovcnt = 1; 305 si->si_uio.uio_resid = len; 306 si->si_uio.uio_offset = 0; 307 si->si_uio.uio_segflg = UIO_USERSPACE; 308 si->si_uio.uio_rw = 309 (screq->flags & SCCMD_READ) ? UIO_READ : UIO_WRITE; 310 si->si_uio.uio_procp = p; 311 error = physio(scsistrategy, &si->si_bp, dev, 312 (screq->flags & SCCMD_READ) ? B_READ : B_WRITE, 313 sc_link->adapter->scsi_minphys, &si->si_uio); 314 } else { 315 /* if no data, no need to translate it.. */ 316 si->si_bp.b_flags = 0; 317 si->si_bp.b_data = 0; 318 si->si_bp.b_bcount = 0; 319 si->si_bp.b_dev = dev; 320 si->si_bp.b_proc = p; 321 scsistrategy(&si->si_bp); 322 error = si->si_bp.b_error; 323 } 324 *screq = si->si_screq; 325 si_free(si); 326 return error; 327 } 328 case SCIOCDEBUG: { 329 int level = *((int *)addr); 330 331 SC_DEBUG(sc_link, SDEV_DB3, ("debug set to %d\n", level)); 332 sc_link->flags &= ~SDEV_DBX; /* clear debug bits */ 333 if (level & 1) 334 sc_link->flags |= SDEV_DB1; 335 if (level & 2) 336 sc_link->flags |= SDEV_DB2; 337 if (level & 4) 338 sc_link->flags |= SDEV_DB3; 339 if (level & 8) 340 sc_link->flags |= SDEV_DB4; 341 return 0; 342 } 343 case SCIOCREPROBE: { 344 struct scsi_addr *sca = (struct scsi_addr *)addr; 345 346 return scsi_probe_busses(sca->scbus, sca->target, sca->lun); 347 } 348 case SCIOCRECONFIG: 349 case SCIOCDECONFIG: 350 return EINVAL; 351 case SCIOCIDENTIFY: { 352 struct scsi_addr *sca = (struct scsi_addr *)addr; 353 354 sca->scbus = sc_link->scsibus; 355 sca->target = sc_link->target; 356 sca->lun = sc_link->lun; 357 return 0; 358 } 359 default: 360 return ENOTTY; 361 } 362 363 #ifdef DIAGNOSTIC 364 panic("scsi_do_ioctl: impossible"); 365 #endif 366 } 367
Indexes created Mon Sep 22 05:09:51 GMT 2025