scsipi_ioctl.c revision 1.18
1 /* $NetBSD: scsipi_ioctl.c,v 1.18 1995/01/30 15:54:42 mycroft 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/malloc.h> 43 #include <sys/buf.h> 44 #include <sys/proc.h> 45 #include <sys/device.h> 46 47 #include <scsi/scsi_all.h> 48 #include <scsi/scsiconf.h> 49 #include <sys/scsiio.h> 50 51 struct scsi_ioctl { 52 LIST_ENTRY(scsi_ioctl) si_list; 53 struct buf si_bp; 54 struct uio si_uio; 55 struct iovec si_iov; 56 scsireq_t si_screq; 57 struct scsi_link *si_sc_link; 58 }; 59 60 LIST_HEAD(, scsi_ioctl) si_head; 61 62 struct scsi_ioctl * 63 si_get() 64 { 65 struct scsi_ioctl *si; 66 int s; 67 68 si = malloc(sizeof(struct scsi_ioctl), M_TEMP, M_WAITOK); 69 bzero(si, sizeof(struct scsi_ioctl)); 70 s = splbio(); 71 LIST_INSERT_HEAD(&si_head, si, si_list); 72 splx(s); 73 return (si); 74 } 75 76 void 77 si_free(si) 78 struct scsi_ioctl *si; 79 { 80 int s; 81 82 s = splbio(); 83 LIST_REMOVE(si, si_list); 84 splx(s); 85 free(si, M_TEMP); 86 } 87 88 struct scsi_ioctl * 89 si_find(bp) 90 struct buf *bp; 91 { 92 struct scsi_ioctl *si; 93 int s; 94 95 s = splbio(); 96 for (si = si_head.lh_first; si != 0; si = si->si_list.le_next) 97 if (bp == &si->si_bp) 98 break; 99 splx(s); 100 return (si); 101 } 102 103 /* 104 * We let the user interpret his own sense in the generic scsi world. 105 * This routine is called at interrupt time if the SCSI_USER bit was set 106 * in the flags passed to scsi_scsi_cmd(). No other completion processing 107 * takes place, even if we are running over another device driver. 108 * The lower level routines that call us here, will free the xs and restart 109 * the device's queue if such exists. 110 */ 111 void 112 scsi_user_done(xs) 113 struct scsi_xfer *xs; 114 { 115 struct buf *bp; 116 struct scsi_ioctl *si; 117 scsireq_t *screq; 118 struct scsi_link *sc_link; 119 120 bp = xs->bp; 121 if (!bp) { /* ALL user requests must have a buf */ 122 sc_print_addr(xs->sc_link); 123 printf("User command with no buf\n"); 124 return; 125 } 126 si = si_find(bp); 127 if (!si) { 128 sc_print_addr(xs->sc_link); 129 printf("User command with no ioctl\n"); 130 return; 131 } 132 screq = &si->si_screq; 133 sc_link = si->si_sc_link; 134 SC_DEBUG(xs->sc_link, SDEV_DB2, ("user-done\n")); 135 136 screq->retsts = 0; 137 screq->status = xs->status; 138 switch (xs->error) { 139 case XS_NOERROR: 140 SC_DEBUG(sc_link, SDEV_DB3, ("no error\n")); 141 screq->datalen_used = xs->datalen - xs->resid; /* probably rubbish */ 142 screq->retsts = SCCMD_OK; 143 break; 144 case XS_SENSE: 145 SC_DEBUG(sc_link, SDEV_DB3, ("have sense\n")); 146 screq->senselen_used = min(sizeof(xs->sense), SENSEBUFLEN); 147 bcopy(&xs->sense, screq->sense, screq->senselen); 148 screq->retsts = SCCMD_SENSE; 149 break; 150 case XS_DRIVER_STUFFUP: 151 sc_print_addr(sc_link); 152 printf("host adapter code inconsistency\n"); 153 screq->retsts = SCCMD_UNKNOWN; 154 break; 155 case XS_TIMEOUT: 156 SC_DEBUG(sc_link, SDEV_DB3, ("timeout\n")); 157 screq->retsts = SCCMD_TIMEOUT; 158 break; 159 case XS_BUSY: 160 SC_DEBUG(sc_link, SDEV_DB3, ("busy\n")); 161 screq->retsts = SCCMD_BUSY; 162 break; 163 default: 164 sc_print_addr(sc_link); 165 printf("unknown error category from host adapter code\n"); 166 screq->retsts = SCCMD_UNKNOWN; 167 break; 168 } 169 biodone(bp); /* we're waiting on it in scsi_strategy() */ 170 } 171 172 173 /* Pseudo strategy function 174 * Called by scsi_do_ioctl() via physio/physstrat if there is to 175 * be data transfered, and directly if there is no data transfer. 176 * 177 * Should I reorganize this so it returns to physio instead 178 * of sleeping in scsiio_scsi_cmd? Is there any advantage, other 179 * than avoiding the probable duplicate wakeup in iodone? [PD] 180 * 181 * No, seems ok to me... [JRE] 182 * (I don't see any duplicate wakeups) 183 * 184 * Can't be used with block devices or raw_read/raw_write directly 185 * from the cdevsw/bdevsw tables because they couldn't have added 186 * the screq structure. [JRE] 187 */ 188 void 189 scsistrategy(bp) 190 struct buf *bp; 191 { 192 struct scsi_ioctl *si; 193 scsireq_t *screq; 194 struct scsi_link *sc_link; 195 int error; 196 int flags = 0; 197 int s; 198 199 si = si_find(bp); 200 if (!si) { 201 printf("user_strat: No ioctl\n"); 202 error = EINVAL; 203 goto bad; 204 } 205 screq = &si->si_screq; 206 sc_link = si->si_sc_link; 207 SC_DEBUG(sc_link, SDEV_DB2, ("user_strategy\n")); 208 209 /* 210 * We're in trouble if physio tried to break up the transfer. 211 */ 212 if (bp->b_bcount != screq->datalen) { 213 sc_print_addr(sc_link); 214 printf("physio split the request.. cannot proceed\n"); 215 error = EIO; 216 goto bad; 217 } 218 219 if (screq->timeout == 0) { 220 error = EINVAL; 221 goto bad; 222 } 223 224 if (screq->cmdlen > sizeof(struct scsi_generic)) { 225 sc_print_addr(sc_link); 226 printf("cmdlen too big\n"); 227 error = EFAULT; 228 goto bad; 229 } 230 231 if (screq->flags & SCCMD_READ) 232 flags |= SCSI_DATA_IN; 233 if (screq->flags & SCCMD_WRITE) 234 flags |= SCSI_DATA_OUT; 235 if (screq->flags & SCCMD_TARGET) 236 flags |= SCSI_TARGET; 237 if (screq->flags & SCCMD_ESCAPE) 238 flags |= SCSI_ESCAPE; 239 240 error = scsi_scsi_cmd(sc_link, (struct scsi_generic *)screq->cmd, 241 screq->cmdlen, (u_char *)bp->b_data, screq->datalen, 242 0, /* user must do the retries *//* ignored */ 243 screq->timeout, bp, flags | SCSI_USER | SCSI_NOSLEEP); 244 245 /* because there is a bp, scsi_scsi_cmd will return immediatly */ 246 if (error) 247 goto bad; 248 249 SC_DEBUG(sc_link, SDEV_DB3, ("about to sleep\n")); 250 s = splbio(); 251 while ((bp->b_flags & B_DONE) == 0) 252 tsleep(bp, PRIBIO, "scistr", 0); 253 splx(s); 254 SC_DEBUG(sc_link, SDEV_DB3, ("back from sleep\n")); 255 256 return; 257 258 bad: 259 bp->b_flags |= B_ERROR; 260 bp->b_error = error; 261 biodone(bp); 262 } 263 264 /* 265 * Something (e.g. another driver) has called us 266 * with an sc_link for a target/lun/adapter, and a scsi 267 * specific ioctl to perform, better try. 268 * If user-level type command, we must still be running 269 * in the context of the calling process 270 */ 271 int 272 scsi_do_ioctl(sc_link, dev, cmd, addr, flag, p) 273 struct scsi_link *sc_link; 274 dev_t dev; 275 u_long cmd; 276 caddr_t addr; 277 int flag; 278 struct proc *p; 279 { 280 int error; 281 282 SC_DEBUG(sc_link, SDEV_DB2, ("scsi_do_ioctl(0x%lx)\n", cmd)); 283 284 switch(cmd) { 285 case SCIOCCOMMAND: { 286 scsireq_t *screq = (scsireq_t *)addr; 287 struct scsi_ioctl *si; 288 int len; 289 290 si = si_get(); 291 si->si_screq = *screq; 292 si->si_sc_link = sc_link; 293 len = screq->datalen; 294 if (len) { 295 si->si_iov.iov_base = screq->databuf; 296 si->si_iov.iov_len = len; 297 si->si_uio.uio_iov = &si->si_iov; 298 si->si_uio.uio_iovcnt = 1; 299 si->si_uio.uio_resid = len; 300 si->si_uio.uio_offset = 0; 301 si->si_uio.uio_segflg = UIO_USERSPACE; 302 si->si_uio.uio_rw = 303 (screq->flags & SCCMD_READ) ? UIO_READ : UIO_WRITE; 304 si->si_uio.uio_procp = p; 305 error = physio(scsistrategy, &si->si_bp, dev, 306 (screq->flags & SCCMD_READ) ? B_READ : B_WRITE, 307 sc_link->adapter->scsi_minphys, &si->si_uio); 308 } else { 309 /* if no data, no need to translate it.. */ 310 si->si_bp.b_flags = 0; 311 si->si_bp.b_data = 0; 312 si->si_bp.b_bcount = 0; 313 si->si_bp.b_dev = dev; 314 si->si_bp.b_proc = p; 315 scsistrategy(&si->si_bp); 316 error = si->si_bp.b_error; 317 } 318 *screq = si->si_screq; 319 si_free(si); 320 return error; 321 } 322 case SCIOCDEBUG: { 323 int level = *((int *)addr); 324 325 SC_DEBUG(sc_link, SDEV_DB3, ("debug set to %d\n", level)); 326 sc_link->flags &= ~SDEV_DBX; /* clear debug bits */ 327 if (level & 1) 328 sc_link->flags |= SDEV_DB1; 329 if (level & 2) 330 sc_link->flags |= SDEV_DB2; 331 if (level & 4) 332 sc_link->flags |= SDEV_DB3; 333 if (level & 8) 334 sc_link->flags |= SDEV_DB4; 335 return 0; 336 } 337 case SCIOCREPROBE: { 338 struct scsi_addr *sca = (struct scsi_addr *)addr; 339 340 return scsi_probe_busses(sca->scbus, sca->target, sca->lun); 341 } 342 case SCIOCRECONFIG: 343 case SCIOCDECONFIG: 344 return EINVAL; 345 case SCIOCIDENTIFY: { 346 struct scsi_addr *sca = (struct scsi_addr *)addr; 347 348 sca->scbus = sc_link->scsibus; 349 sca->target = sc_link->target; 350 sca->lun = sc_link->lun; 351 return 0; 352 } 353 default: 354 return ENOTTY; 355 } 356 357 #ifdef DIAGNOSTIC 358 panic("scsi_do_ioctl: impossible"); 359 #endif 360 } 361
Indexes created Mon Sep 22 21:09:42 GMT 2025