st_scsi.c revision 1.2.2.5
1 1.2.2.5 nathanw /* $NetBSD: st_scsi.c,v 1.2.2.5 2002/01/08 00:31:58 nathanw Exp $ */ 2 1.2.2.2 nathanw 3 1.2.2.2 nathanw /*- 4 1.2.2.2 nathanw * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 1.2.2.2 nathanw * All rights reserved. 6 1.2.2.2 nathanw * 7 1.2.2.2 nathanw * This code is derived from software contributed to The NetBSD Foundation 8 1.2.2.2 nathanw * by Charles M. Hannum. 9 1.2.2.2 nathanw * 10 1.2.2.2 nathanw * Redistribution and use in source and binary forms, with or without 11 1.2.2.2 nathanw * modification, are permitted provided that the following conditions 12 1.2.2.2 nathanw * are met: 13 1.2.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 14 1.2.2.2 nathanw * notice, this list of conditions and the following disclaimer. 15 1.2.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 17 1.2.2.2 nathanw * documentation and/or other materials provided with the distribution. 18 1.2.2.2 nathanw * 3. All advertising materials mentioning features or use of this software 19 1.2.2.2 nathanw * must display the following acknowledgement: 20 1.2.2.2 nathanw * This product includes software developed by the NetBSD 21 1.2.2.2 nathanw * Foundation, Inc. and its contributors. 22 1.2.2.2 nathanw * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.2.2.2 nathanw * contributors may be used to endorse or promote products derived 24 1.2.2.2 nathanw * from this software without specific prior written permission. 25 1.2.2.2 nathanw * 26 1.2.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.2.2.2 nathanw * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.2.2.2 nathanw * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.2.2.2 nathanw * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.2.2.2 nathanw * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.2.2.2 nathanw * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.2.2.2 nathanw * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.2.2.2 nathanw * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.2.2.2 nathanw * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.2.2.2 nathanw * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.2.2.2 nathanw * POSSIBILITY OF SUCH DAMAGE. 37 1.2.2.2 nathanw */ 38 1.2.2.2 nathanw 39 1.2.2.2 nathanw /* 40 1.2.2.2 nathanw * Originally written by Julian Elischer (julian (at) tfs.com) 41 1.2.2.2 nathanw * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 1.2.2.2 nathanw * 43 1.2.2.2 nathanw * TRW Financial Systems, in accordance with their agreement with Carnegie 44 1.2.2.2 nathanw * Mellon University, makes this software available to CMU to distribute 45 1.2.2.2 nathanw * or use in any manner that they see fit as long as this message is kept with 46 1.2.2.2 nathanw * the software. For this reason TFS also grants any other persons or 47 1.2.2.2 nathanw * organisations permission to use or modify this software. 48 1.2.2.2 nathanw * 49 1.2.2.2 nathanw * TFS supplies this software to be publicly redistributed 50 1.2.2.2 nathanw * on the understanding that TFS is not responsible for the correct 51 1.2.2.2 nathanw * functioning of this software in any circumstances. 52 1.2.2.2 nathanw * 53 1.2.2.2 nathanw * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992 54 1.2.2.2 nathanw * major changes by Julian Elischer (julian (at) jules.dialix.oz.au) May 1993 55 1.2.2.2 nathanw * 56 1.2.2.2 nathanw * A lot of rewhacking done by mjacob (mjacob (at) nas.nasa.gov). 57 1.2.2.2 nathanw */ 58 1.2.2.2 nathanw 59 1.2.2.4 nathanw #include <sys/cdefs.h> 60 1.2.2.5 nathanw __KERNEL_RCSID(0, "$NetBSD: st_scsi.c,v 1.2.2.5 2002/01/08 00:31:58 nathanw Exp $"); 61 1.2.2.4 nathanw 62 1.2.2.2 nathanw #include "opt_scsi.h" 63 1.2.2.2 nathanw #include "rnd.h" 64 1.2.2.2 nathanw 65 1.2.2.2 nathanw #include <sys/param.h> 66 1.2.2.2 nathanw #include <sys/device.h> 67 1.2.2.2 nathanw #include <sys/buf.h> 68 1.2.2.2 nathanw #include <sys/conf.h> 69 1.2.2.2 nathanw #include <sys/kernel.h> 70 1.2.2.2 nathanw #include <sys/systm.h> 71 1.2.2.2 nathanw 72 1.2.2.2 nathanw #include <dev/scsipi/stvar.h> 73 1.2.2.2 nathanw #include <dev/scsipi/scsi_tape.h> 74 1.2.2.2 nathanw #include <dev/scsipi/scsi_all.h> 75 1.2.2.2 nathanw 76 1.2.2.2 nathanw int st_scsibus_match __P((struct device *, struct cfdata *, void *)); 77 1.2.2.2 nathanw void st_scsibus_attach __P((struct device *, struct device *, void *)); 78 1.2.2.2 nathanw int st_scsibus_ops __P((struct st_softc *, int, int)); 79 1.2.2.2 nathanw int st_scsibus_read_block_limits __P((struct st_softc *, int)); 80 1.2.2.2 nathanw int st_scsibus_mode_sense __P((struct st_softc *, int)); 81 1.2.2.2 nathanw int st_scsibus_mode_select __P((struct st_softc *, int)); 82 1.2.2.2 nathanw int st_scsibus_cmprss __P((struct st_softc *, int, int)); 83 1.2.2.2 nathanw 84 1.2.2.2 nathanw struct cfattach st_scsibus_ca = { 85 1.2.2.5 nathanw sizeof(struct st_softc), st_scsibus_match, st_scsibus_attach, 86 1.2.2.5 nathanw stdetach, stactivate 87 1.2.2.2 nathanw }; 88 1.2.2.2 nathanw 89 1.2.2.2 nathanw const struct scsipi_inquiry_pattern st_scsibus_patterns[] = { 90 1.2.2.2 nathanw {T_SEQUENTIAL, T_REMOV, 91 1.2.2.2 nathanw "", "", ""}, 92 1.2.2.2 nathanw }; 93 1.2.2.2 nathanw 94 1.2.2.2 nathanw int 95 1.2.2.2 nathanw st_scsibus_match(parent, match, aux) 96 1.2.2.2 nathanw struct device *parent; 97 1.2.2.2 nathanw struct cfdata *match; 98 1.2.2.2 nathanw void *aux; 99 1.2.2.2 nathanw { 100 1.2.2.2 nathanw struct scsipibus_attach_args *sa = aux; 101 1.2.2.2 nathanw int priority; 102 1.2.2.2 nathanw 103 1.2.2.2 nathanw if (scsipi_periph_bustype(sa->sa_periph) != SCSIPI_BUSTYPE_SCSI) 104 1.2.2.2 nathanw return (0); 105 1.2.2.2 nathanw 106 1.2.2.2 nathanw (void)scsipi_inqmatch(&sa->sa_inqbuf, 107 1.2.2.2 nathanw (caddr_t)st_scsibus_patterns, 108 1.2.2.2 nathanw sizeof(st_scsibus_patterns)/sizeof(st_scsibus_patterns[0]), 109 1.2.2.2 nathanw sizeof(st_scsibus_patterns[0]), &priority); 110 1.2.2.2 nathanw return (priority); 111 1.2.2.2 nathanw } 112 1.2.2.2 nathanw 113 1.2.2.2 nathanw void 114 1.2.2.2 nathanw st_scsibus_attach(parent, self, aux) 115 1.2.2.2 nathanw struct device *parent, *self; 116 1.2.2.2 nathanw void *aux; 117 1.2.2.2 nathanw { 118 1.2.2.2 nathanw struct st_softc *st = (void *)self; 119 1.2.2.2 nathanw 120 1.2.2.2 nathanw st->ops = st_scsibus_ops; 121 1.2.2.2 nathanw stattach(parent, st, aux); 122 1.2.2.2 nathanw } 123 1.2.2.2 nathanw 124 1.2.2.2 nathanw int 125 1.2.2.2 nathanw st_scsibus_ops(st, op, flags) 126 1.2.2.2 nathanw struct st_softc *st; 127 1.2.2.2 nathanw int op; 128 1.2.2.2 nathanw int flags; 129 1.2.2.2 nathanw { 130 1.2.2.2 nathanw switch(op) { 131 1.2.2.2 nathanw case ST_OPS_RBL: 132 1.2.2.2 nathanw return st_scsibus_read_block_limits(st, flags); 133 1.2.2.2 nathanw case ST_OPS_MODESENSE: 134 1.2.2.2 nathanw return st_scsibus_mode_sense(st, flags); 135 1.2.2.2 nathanw case ST_OPS_MODESELECT: 136 1.2.2.2 nathanw return st_scsibus_mode_select(st, flags); 137 1.2.2.2 nathanw case ST_OPS_CMPRSS_ON: 138 1.2.2.2 nathanw case ST_OPS_CMPRSS_OFF: 139 1.2.2.2 nathanw return st_scsibus_cmprss(st, flags, 140 1.2.2.2 nathanw (op == ST_OPS_CMPRSS_ON) ? 1 : 0); 141 1.2.2.2 nathanw default: 142 1.2.2.2 nathanw panic("st_scsibus_ops: invalid op"); 143 1.2.2.2 nathanw return 0; /* XXX to appease gcc */ 144 1.2.2.2 nathanw } 145 1.2.2.2 nathanw /* NOTREACHED */ 146 1.2.2.2 nathanw } 147 1.2.2.2 nathanw 148 1.2.2.2 nathanw /* 149 1.2.2.2 nathanw * Ask the drive what it's min and max blk sizes are. 150 1.2.2.2 nathanw */ 151 1.2.2.2 nathanw int 152 1.2.2.2 nathanw st_scsibus_read_block_limits(st, flags) 153 1.2.2.2 nathanw struct st_softc *st; 154 1.2.2.2 nathanw int flags; 155 1.2.2.2 nathanw { 156 1.2.2.2 nathanw struct scsi_block_limits cmd; 157 1.2.2.2 nathanw struct scsi_block_limits_data block_limits; 158 1.2.2.2 nathanw struct scsipi_periph *periph = st->sc_periph; 159 1.2.2.2 nathanw int error; 160 1.2.2.2 nathanw 161 1.2.2.2 nathanw /* 162 1.2.2.2 nathanw * do a 'Read Block Limits' 163 1.2.2.2 nathanw */ 164 1.2.2.3 nathanw memset(&cmd, 0, sizeof(cmd)); 165 1.2.2.2 nathanw cmd.opcode = READ_BLOCK_LIMITS; 166 1.2.2.2 nathanw 167 1.2.2.2 nathanw /* 168 1.2.2.2 nathanw * do the command, update the global values 169 1.2.2.2 nathanw */ 170 1.2.2.2 nathanw error = scsipi_command(periph, (struct scsipi_generic *)&cmd, 171 1.2.2.2 nathanw sizeof(cmd), (u_char *)&block_limits, sizeof(block_limits), 172 1.2.2.2 nathanw ST_RETRIES, ST_CTL_TIME, NULL, 173 1.2.2.2 nathanw flags | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 174 1.2.2.2 nathanw if (error) 175 1.2.2.2 nathanw return (error); 176 1.2.2.2 nathanw 177 1.2.2.2 nathanw st->blkmin = _2btol(block_limits.min_length); 178 1.2.2.2 nathanw st->blkmax = _3btol(block_limits.max_length); 179 1.2.2.2 nathanw 180 1.2.2.2 nathanw SC_DEBUG(periph, SCSIPI_DB3, 181 1.2.2.2 nathanw ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); 182 1.2.2.2 nathanw return (0); 183 1.2.2.2 nathanw } 184 1.2.2.2 nathanw 185 1.2.2.2 nathanw /* 186 1.2.2.2 nathanw * Get the scsi driver to send a full inquiry to the 187 1.2.2.2 nathanw * device and use the results to fill out the global 188 1.2.2.2 nathanw * parameter structure. 189 1.2.2.2 nathanw * 190 1.2.2.2 nathanw * called from: 191 1.2.2.2 nathanw * attach 192 1.2.2.2 nathanw * open 193 1.2.2.2 nathanw * ioctl (to reset original blksize) 194 1.2.2.2 nathanw */ 195 1.2.2.2 nathanw int 196 1.2.2.2 nathanw st_scsibus_mode_sense(st, flags) 197 1.2.2.2 nathanw struct st_softc *st; 198 1.2.2.2 nathanw int flags; 199 1.2.2.2 nathanw { 200 1.2.2.2 nathanw u_int scsipi_sense_len; 201 1.2.2.2 nathanw int error; 202 1.2.2.2 nathanw struct scsipi_sense { 203 1.2.2.2 nathanw struct scsipi_mode_header header; 204 1.2.2.2 nathanw struct scsi_blk_desc blk_desc; 205 1.2.2.2 nathanw u_char sense_data[MAX_PAGE_0_SIZE]; 206 1.2.2.2 nathanw } scsipi_sense; 207 1.2.2.2 nathanw struct scsipi_periph *periph = st->sc_periph; 208 1.2.2.2 nathanw 209 1.2.2.2 nathanw scsipi_sense_len = 12 + st->page_0_size; 210 1.2.2.2 nathanw 211 1.2.2.2 nathanw /* 212 1.2.2.2 nathanw * Set up a mode sense 213 1.2.2.2 nathanw * We don't need the results. Just print them for our interest's sake, 214 1.2.2.2 nathanw * if asked, or if we need it as a template for the mode select store 215 1.2.2.2 nathanw * it away. 216 1.2.2.2 nathanw */ 217 1.2.2.2 nathanw error = scsipi_mode_sense(st->sc_periph, 0, SMS_PAGE_CTRL_CURRENT, 218 1.2.2.2 nathanw &scsipi_sense.header, scsipi_sense_len, flags | XS_CTL_DATA_ONSTACK, 219 1.2.2.2 nathanw ST_RETRIES, ST_CTL_TIME); 220 1.2.2.2 nathanw if (error) 221 1.2.2.2 nathanw return (error); 222 1.2.2.2 nathanw 223 1.2.2.2 nathanw st->numblks = _3btol(scsipi_sense.blk_desc.nblocks); 224 1.2.2.2 nathanw st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen); 225 1.2.2.2 nathanw st->media_density = scsipi_sense.blk_desc.density; 226 1.2.2.2 nathanw if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) 227 1.2.2.2 nathanw st->flags |= ST_READONLY; 228 1.2.2.2 nathanw else 229 1.2.2.2 nathanw st->flags &= ~ST_READONLY; 230 1.2.2.2 nathanw SC_DEBUG(periph, SCSIPI_DB3, 231 1.2.2.2 nathanw ("density code %d, %d-byte blocks, write-%s, ", 232 1.2.2.2 nathanw st->media_density, st->media_blksize, 233 1.2.2.2 nathanw st->flags & ST_READONLY ? "protected" : "enabled")); 234 1.2.2.2 nathanw SC_DEBUG(periph, SCSIPI_DB3, 235 1.2.2.2 nathanw ("%sbuffered\n", 236 1.2.2.2 nathanw scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un")); 237 1.2.2.2 nathanw if (st->page_0_size) 238 1.2.2.3 nathanw memcpy(st->sense_data, scsipi_sense.sense_data, 239 1.2.2.2 nathanw st->page_0_size); 240 1.2.2.2 nathanw periph->periph_flags |= PERIPH_MEDIA_LOADED; 241 1.2.2.2 nathanw return (0); 242 1.2.2.2 nathanw } 243 1.2.2.2 nathanw 244 1.2.2.2 nathanw /* 245 1.2.2.2 nathanw * Send a filled out parameter structure to the drive to 246 1.2.2.2 nathanw * set it into the desire modes etc. 247 1.2.2.2 nathanw */ 248 1.2.2.2 nathanw int 249 1.2.2.2 nathanw st_scsibus_mode_select(st, flags) 250 1.2.2.2 nathanw struct st_softc *st; 251 1.2.2.2 nathanw int flags; 252 1.2.2.2 nathanw { 253 1.2.2.2 nathanw u_int scsi_select_len; 254 1.2.2.2 nathanw struct scsi_select { 255 1.2.2.2 nathanw struct scsipi_mode_header header; 256 1.2.2.2 nathanw struct scsi_blk_desc blk_desc; 257 1.2.2.2 nathanw u_char sense_data[MAX_PAGE_0_SIZE]; 258 1.2.2.2 nathanw } scsi_select; 259 1.2.2.2 nathanw struct scsipi_periph *periph = st->sc_periph; 260 1.2.2.2 nathanw 261 1.2.2.2 nathanw scsi_select_len = 12 + st->page_0_size; 262 1.2.2.2 nathanw 263 1.2.2.2 nathanw /* 264 1.2.2.2 nathanw * This quirk deals with drives that have only one valid mode 265 1.2.2.2 nathanw * and think this gives them license to reject all mode selects, 266 1.2.2.2 nathanw * even if the selected mode is the one that is supported. 267 1.2.2.2 nathanw */ 268 1.2.2.2 nathanw if (st->quirks & ST_Q_UNIMODAL) { 269 1.2.2.2 nathanw SC_DEBUG(periph, SCSIPI_DB3, 270 1.2.2.2 nathanw ("not setting density 0x%x blksize 0x%x\n", 271 1.2.2.2 nathanw st->density, st->blksize)); 272 1.2.2.2 nathanw return (0); 273 1.2.2.2 nathanw } 274 1.2.2.2 nathanw 275 1.2.2.2 nathanw /* 276 1.2.2.2 nathanw * Set up for a mode select 277 1.2.2.2 nathanw */ 278 1.2.2.3 nathanw memset(&scsi_select, 0, scsi_select_len); 279 1.2.2.2 nathanw scsi_select.header.blk_desc_len = sizeof(struct scsi_blk_desc); 280 1.2.2.2 nathanw scsi_select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 281 1.2.2.2 nathanw scsi_select.blk_desc.density = st->density; 282 1.2.2.2 nathanw if (st->flags & ST_DONTBUFFER) 283 1.2.2.2 nathanw scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 284 1.2.2.2 nathanw else 285 1.2.2.2 nathanw scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 286 1.2.2.2 nathanw if (st->flags & ST_FIXEDBLOCKS) 287 1.2.2.2 nathanw _lto3b(st->blksize, scsi_select.blk_desc.blklen); 288 1.2.2.2 nathanw if (st->page_0_size) 289 1.2.2.3 nathanw memcpy(scsi_select.sense_data, st->sense_data, st->page_0_size); 290 1.2.2.2 nathanw 291 1.2.2.2 nathanw /* 292 1.2.2.2 nathanw * do the command 293 1.2.2.2 nathanw */ 294 1.2.2.2 nathanw return scsipi_mode_select(periph, 0, &scsi_select.header, 295 1.2.2.2 nathanw scsi_select_len, flags | XS_CTL_DATA_ONSTACK, 296 1.2.2.2 nathanw ST_RETRIES, ST_CTL_TIME); 297 1.2.2.2 nathanw } 298 1.2.2.2 nathanw 299 1.2.2.2 nathanw int 300 1.2.2.2 nathanw st_scsibus_cmprss(st, flags, onoff) 301 1.2.2.2 nathanw struct st_softc *st; 302 1.2.2.2 nathanw int flags; 303 1.2.2.2 nathanw int onoff; 304 1.2.2.2 nathanw { 305 1.2.2.2 nathanw u_int scsi_dlen; 306 1.2.2.2 nathanw int byte2, page; 307 1.2.2.2 nathanw struct scsi_select { 308 1.2.2.2 nathanw struct scsipi_mode_header header; 309 1.2.2.2 nathanw struct scsi_blk_desc blk_desc; 310 1.2.2.2 nathanw u_char pdata[MAX(sizeof(struct scsi_tape_dev_conf_page), 311 1.2.2.2 nathanw sizeof(struct scsi_tape_dev_compression_page))]; 312 1.2.2.2 nathanw } scsi_pdata; 313 1.2.2.2 nathanw struct scsi_tape_dev_conf_page *ptr; 314 1.2.2.2 nathanw struct scsi_tape_dev_compression_page *cptr; 315 1.2.2.2 nathanw struct scsipi_periph *periph = st->sc_periph; 316 1.2.2.2 nathanw int error, ison; 317 1.2.2.2 nathanw 318 1.2.2.2 nathanw scsi_dlen = sizeof(scsi_pdata); 319 1.2.2.2 nathanw /* 320 1.2.2.2 nathanw * Do DATA COMPRESSION page first. 321 1.2.2.2 nathanw */ 322 1.2.2.2 nathanw page = SMS_PAGE_CTRL_CURRENT | 0xf; 323 1.2.2.2 nathanw byte2 = 0; 324 1.2.2.2 nathanw 325 1.2.2.2 nathanw /* 326 1.2.2.2 nathanw * Do the MODE SENSE command... 327 1.2.2.2 nathanw */ 328 1.2.2.2 nathanw again: 329 1.2.2.3 nathanw memset(&scsi_pdata, 0, scsi_dlen); 330 1.2.2.2 nathanw error = scsipi_mode_sense(periph, byte2, page, 331 1.2.2.2 nathanw &scsi_pdata.header, scsi_dlen, flags | XS_CTL_DATA_ONSTACK, 332 1.2.2.2 nathanw ST_RETRIES, ST_CTL_TIME); 333 1.2.2.2 nathanw 334 1.2.2.2 nathanw if (error) { 335 1.2.2.2 nathanw if (byte2 != SMS_DBD) { 336 1.2.2.2 nathanw byte2 = SMS_DBD; 337 1.2.2.2 nathanw goto again; 338 1.2.2.2 nathanw } 339 1.2.2.2 nathanw /* 340 1.2.2.2 nathanw * Try a different page? 341 1.2.2.2 nathanw */ 342 1.2.2.2 nathanw if (page == (SMS_PAGE_CTRL_CURRENT | 0xf)) { 343 1.2.2.2 nathanw page = SMS_PAGE_CTRL_CURRENT | 0x10; 344 1.2.2.2 nathanw byte2 = 0; 345 1.2.2.2 nathanw goto again; 346 1.2.2.2 nathanw } 347 1.2.2.2 nathanw return (error); 348 1.2.2.2 nathanw } 349 1.2.2.2 nathanw 350 1.2.2.2 nathanw if (scsi_pdata.header.blk_desc_len) 351 1.2.2.2 nathanw ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata; 352 1.2.2.2 nathanw else 353 1.2.2.2 nathanw ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc; 354 1.2.2.2 nathanw 355 1.2.2.2 nathanw if ((page & SMS_PAGE_CODE) == 0xf) { 356 1.2.2.2 nathanw cptr = (struct scsi_tape_dev_compression_page *) ptr; 357 1.2.2.2 nathanw ison = (cptr->dce_dcc & DCP_DCE) != 0; 358 1.2.2.2 nathanw if (onoff) 359 1.2.2.2 nathanw cptr->dce_dcc |= DCP_DCE; 360 1.2.2.2 nathanw else 361 1.2.2.2 nathanw cptr->dce_dcc &= ~DCP_DCE; 362 1.2.2.2 nathanw cptr->pagecode &= ~0x80; 363 1.2.2.2 nathanw } else { 364 1.2.2.2 nathanw ison = (ptr->sel_comp_alg != 0); 365 1.2.2.2 nathanw if (onoff) 366 1.2.2.2 nathanw ptr->sel_comp_alg = 1; 367 1.2.2.2 nathanw else 368 1.2.2.2 nathanw ptr->sel_comp_alg = 0; 369 1.2.2.2 nathanw ptr->pagecode &= ~0x80; 370 1.2.2.2 nathanw ptr->byte2 = 0; 371 1.2.2.2 nathanw ptr->active_partition = 0; 372 1.2.2.2 nathanw ptr->wb_full_ratio = 0; 373 1.2.2.2 nathanw ptr->rb_empty_ratio = 0; 374 1.2.2.2 nathanw ptr->byte8 &= ~0x30; 375 1.2.2.2 nathanw ptr->gap_size = 0; 376 1.2.2.2 nathanw ptr->byte10 &= ~0xe7; 377 1.2.2.2 nathanw ptr->ew_bufsize[0] = 0; 378 1.2.2.2 nathanw ptr->ew_bufsize[1] = 0; 379 1.2.2.2 nathanw ptr->ew_bufsize[2] = 0; 380 1.2.2.2 nathanw ptr->reserved = 0; 381 1.2.2.2 nathanw } 382 1.2.2.2 nathanw /* 383 1.2.2.2 nathanw * There might be a virtue in actually doing the MODE SELECTS, 384 1.2.2.2 nathanw * but let's not clog the bus over it. 385 1.2.2.2 nathanw */ 386 1.2.2.2 nathanw if (onoff == ison) 387 1.2.2.2 nathanw return (0); 388 1.2.2.2 nathanw 389 1.2.2.2 nathanw /* 390 1.2.2.2 nathanw * Set up for a mode select 391 1.2.2.2 nathanw */ 392 1.2.2.2 nathanw 393 1.2.2.2 nathanw scsi_pdata.header.data_length = 0; 394 1.2.2.2 nathanw scsi_pdata.header.medium_type = 0; 395 1.2.2.2 nathanw if ((st->flags & ST_DONTBUFFER) == 0) 396 1.2.2.2 nathanw scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON; 397 1.2.2.2 nathanw else 398 1.2.2.2 nathanw scsi_pdata.header.dev_spec = 0; 399 1.2.2.2 nathanw 400 1.2.2.2 nathanw if (scsi_pdata.header.blk_desc_len) { 401 1.2.2.2 nathanw scsi_pdata.blk_desc.density = 0; 402 1.2.2.2 nathanw scsi_pdata.blk_desc.nblocks[0] = 0; 403 1.2.2.2 nathanw scsi_pdata.blk_desc.nblocks[1] = 0; 404 1.2.2.2 nathanw scsi_pdata.blk_desc.nblocks[2] = 0; 405 1.2.2.2 nathanw } 406 1.2.2.2 nathanw 407 1.2.2.2 nathanw /* 408 1.2.2.2 nathanw * Do the command 409 1.2.2.2 nathanw */ 410 1.2.2.2 nathanw error = scsipi_mode_select(periph, SMS_PF, &scsi_pdata.header, 411 1.2.2.2 nathanw scsi_dlen, flags | XS_CTL_DATA_ONSTACK, ST_RETRIES, ST_CTL_TIME); 412 1.2.2.2 nathanw 413 1.2.2.2 nathanw if (error && (page & SMS_PAGE_CODE) == 0xf) { 414 1.2.2.2 nathanw /* 415 1.2.2.2 nathanw * Try DEVICE CONFIGURATION page. 416 1.2.2.2 nathanw */ 417 1.2.2.2 nathanw page = SMS_PAGE_CTRL_CURRENT | 0x10; 418 1.2.2.2 nathanw goto again; 419 1.2.2.2 nathanw } 420 1.2.2.2 nathanw return (error); 421 1.2.2.2 nathanw } 422
Indexes created Fri Sep 26 20:09:58 GMT 2025