| 1 | /* $NetBSD: st_scsi.c,v 1.37 2015/08/24 23:13:15 pooka Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Charles M. Hannum. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /* |
| 33 | * Originally written by Julian Elischer (julian@tfs.com) |
| 34 | * for TRW Financial Systems for use under the MACH(2.5) operating system. |
| 35 | * |
| 36 | * TRW Financial Systems, in accordance with their agreement with Carnegie |
| 37 | * Mellon University, makes this software available to CMU to distribute |
| 38 | * or use in any manner that they see fit as long as this message is kept with |
| 39 | * the software. For this reason TFS also grants any other persons or |
| 40 | * organisations permission to use or modify this software. |
| 41 | * |
| 42 | * TFS supplies this software to be publicly redistributed |
| 43 | * on the understanding that TFS is not responsible for the correct |
| 44 | * functioning of this software in any circumstances. |
| 45 | * |
| 46 | * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 |
| 47 | * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 |
| 48 | * |
| 49 | * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov). |
| 50 | */ |
| 51 | |
| 52 | #include <sys/cdefs.h> |
| 53 | __KERNEL_RCSID(0, "$NetBSD: st_scsi.c,v 1.37 2015/08/24 23:13:15 pooka Exp $" ); |
| 54 | |
| 55 | #ifdef _KERNEL_OPT |
| 56 | #include "opt_scsi.h" |
| 57 | #endif |
| 58 | |
| 59 | #include <sys/param.h> |
| 60 | #include <sys/device.h> |
| 61 | #include <sys/buf.h> |
| 62 | #include <sys/bufq.h> |
| 63 | #include <sys/conf.h> |
| 64 | #include <sys/kernel.h> |
| 65 | #include <sys/systm.h> |
| 66 | |
| 67 | #include <dev/scsipi/scsi_all.h> |
| 68 | #include <dev/scsipi/scsi_tape.h> |
| 69 | #include <dev/scsipi/stvar.h> |
| 70 | |
| 71 | static int st_scsibus_match(device_t, cfdata_t, void *); |
| 72 | static void st_scsibus_attach(device_t, device_t, void *); |
| 73 | static int st_scsibus_ops(struct st_softc *, int, int); |
| 74 | static int st_scsibus_read_block_limits(struct st_softc *, int); |
| 75 | static int st_scsibus_mode_sense(struct st_softc *, int); |
| 76 | static int st_scsibus_cmprss(struct st_softc *, int, int); |
| 77 | |
| 78 | CFATTACH_DECL_NEW( |
| 79 | st_scsibus, |
| 80 | sizeof(struct st_softc), |
| 81 | st_scsibus_match, |
| 82 | st_scsibus_attach, |
| 83 | stdetach, |
| 84 | NULL |
| 85 | ); |
| 86 | |
| 87 | static const struct scsipi_inquiry_pattern st_scsibus_patterns[] = { |
| 88 | {T_SEQUENTIAL, T_REMOV, |
| 89 | "" , "" , "" }, |
| 90 | }; |
| 91 | |
| 92 | static int |
| 93 | st_scsibus_match(device_t parent, cfdata_t match, void *aux) |
| 94 | { |
| 95 | struct scsipibus_attach_args *sa = aux; |
| 96 | int priority; |
| 97 | |
| 98 | if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(sa->sa_periph)) != |
| 99 | SCSIPI_BUSTYPE_SCSI) |
| 100 | return 0; |
| 101 | |
| 102 | (void)scsipi_inqmatch(&sa->sa_inqbuf, |
| 103 | st_scsibus_patterns, |
| 104 | sizeof(st_scsibus_patterns)/sizeof(st_scsibus_patterns[0]), |
| 105 | sizeof(st_scsibus_patterns[0]), &priority); |
| 106 | return priority; |
| 107 | } |
| 108 | |
| 109 | static void |
| 110 | st_scsibus_attach(device_t parent, device_t self, void *aux) |
| 111 | { |
| 112 | struct st_softc *st = device_private(self); |
| 113 | |
| 114 | st->ops = st_scsibus_ops; |
| 115 | stattach(parent, self, aux); |
| 116 | } |
| 117 | |
| 118 | static int |
| 119 | st_scsibus_ops(struct st_softc *st, int op, int flags) |
| 120 | { |
| 121 | switch(op) { |
| 122 | case ST_OPS_RBL: |
| 123 | return st_scsibus_read_block_limits(st, flags); |
| 124 | case ST_OPS_MODESENSE: |
| 125 | return st_scsibus_mode_sense(st, flags); |
| 126 | case ST_OPS_MODESELECT: |
| 127 | return st_mode_select(st, flags); |
| 128 | case ST_OPS_CMPRSS_ON: |
| 129 | case ST_OPS_CMPRSS_OFF: |
| 130 | return st_scsibus_cmprss(st, flags, |
| 131 | (op == ST_OPS_CMPRSS_ON) ? 1 : 0); |
| 132 | default: |
| 133 | panic("st_scsibus_ops: invalid op" ); |
| 134 | return 0; /* XXX to appease gcc */ |
| 135 | } |
| 136 | /* NOTREACHED */ |
| 137 | } |
| 138 | |
| 139 | /* |
| 140 | * Ask the drive what its min and max blk sizes are. |
| 141 | */ |
| 142 | static int |
| 143 | st_scsibus_read_block_limits(struct st_softc *st, int flags) |
| 144 | { |
| 145 | struct scsi_block_limits cmd; |
| 146 | struct scsi_block_limits_data block_limits; |
| 147 | struct scsipi_periph *periph = st->sc_periph; |
| 148 | int error; |
| 149 | |
| 150 | /* do a 'Read Block Limits' */ |
| 151 | memset(&cmd, 0, sizeof(cmd)); |
| 152 | cmd.opcode = READ_BLOCK_LIMITS; |
| 153 | |
| 154 | /* do the command, update the global values */ |
| 155 | error = scsipi_command(periph, (void *)&cmd, sizeof(cmd), |
| 156 | (void *)&block_limits, sizeof(block_limits), |
| 157 | ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_IN); |
| 158 | if (error) |
| 159 | return error; |
| 160 | |
| 161 | st->blkmin = _2btol(block_limits.min_length); |
| 162 | st->blkmax = _3btol(block_limits.max_length); |
| 163 | |
| 164 | SC_DEBUG(periph, SCSIPI_DB3, |
| 165 | ("(%d <= blksize <= %d)\n" , st->blkmin, st->blkmax)); |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | /* |
| 170 | * Get the scsi driver to send a full inquiry to the |
| 171 | * device and use the results to fill out the global |
| 172 | * parameter structure. |
| 173 | * |
| 174 | * called from: |
| 175 | * attach |
| 176 | * open |
| 177 | * ioctl (to reset original blksize) |
| 178 | */ |
| 179 | static int |
| 180 | st_scsibus_mode_sense(struct st_softc *st, int flags) |
| 181 | { |
| 182 | u_int scsipi_sense_len; |
| 183 | int error; |
| 184 | struct scsipi_sense { |
| 185 | struct scsi_mode_parameter_header_6 ; |
| 186 | struct scsi_general_block_descriptor blk_desc; |
| 187 | u_char sense_data[MAX_PAGE_0_SIZE]; |
| 188 | } scsipi_sense; |
| 189 | struct scsipi_periph *periph = st->sc_periph; |
| 190 | |
| 191 | scsipi_sense_len = sizeof(scsipi_sense.header) + |
| 192 | sizeof(scsipi_sense.blk_desc) + |
| 193 | st->page_0_size; |
| 194 | |
| 195 | /* |
| 196 | * Set up a mode sense |
| 197 | * We don't need the results. Just print them for our interest's sake, |
| 198 | * if asked, or if we need it as a template for the mode select store |
| 199 | * it away. |
| 200 | */ |
| 201 | error = scsipi_mode_sense(st->sc_periph, 0, SMS_PCTRL_CURRENT, |
| 202 | &scsipi_sense.header, scsipi_sense_len, flags, |
| 203 | ST_RETRIES, ST_CTL_TIME); |
| 204 | if (error) |
| 205 | return error; |
| 206 | |
| 207 | st->numblks = _3btol(scsipi_sense.blk_desc.nblocks); |
| 208 | st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen); |
| 209 | st->media_density = scsipi_sense.blk_desc.density; |
| 210 | if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) |
| 211 | st->flags |= ST_READONLY; |
| 212 | else |
| 213 | st->flags &= ~ST_READONLY; |
| 214 | SC_DEBUG(periph, SCSIPI_DB3, |
| 215 | ("density code %d, %d-byte blocks, write-%s, " , |
| 216 | st->media_density, st->media_blksize, |
| 217 | st->flags & ST_READONLY ? "protected" : "enabled" )); |
| 218 | SC_DEBUG(periph, SCSIPI_DB3, |
| 219 | ("%sbuffered\n" , |
| 220 | scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un" )); |
| 221 | if (st->page_0_size) |
| 222 | memcpy(st->sense_data, scsipi_sense.sense_data, |
| 223 | st->page_0_size); |
| 224 | periph->periph_flags |= PERIPH_MEDIA_LOADED; |
| 225 | return 0; |
| 226 | } |
| 227 | |
| 228 | static int |
| 229 | (struct st_softc *st, int flags, int onoff) |
| 230 | { |
| 231 | u_int scsi_dlen; |
| 232 | int byte2, page; |
| 233 | struct scsi_select { |
| 234 | struct scsi_mode_parameter_header_6 ; |
| 235 | struct scsi_general_block_descriptor blk_desc; |
| 236 | u_char pdata[MAX(sizeof(struct scsi_tape_dev_conf_page), |
| 237 | sizeof(struct scsi_tape_dev_compression_page))]; |
| 238 | } scsi_pdata; |
| 239 | struct scsi_tape_dev_conf_page *ptr; |
| 240 | struct scsi_tape_dev_compression_page *cptr; |
| 241 | struct scsipi_periph *periph = st->sc_periph; |
| 242 | int error, ison; |
| 243 | |
| 244 | scsi_dlen = sizeof(scsi_pdata); |
| 245 | /* Do DATA COMPRESSION page first. */ |
| 246 | page = SMS_PCTRL_CURRENT | 0xf; |
| 247 | byte2 = 0; |
| 248 | |
| 249 | /* Do the MODE SENSE command... */ |
| 250 | again: |
| 251 | memset(&scsi_pdata, 0, scsi_dlen); |
| 252 | error = scsipi_mode_sense(periph, byte2, page, |
| 253 | &scsi_pdata.header, scsi_dlen, flags, ST_RETRIES, ST_CTL_TIME); |
| 254 | |
| 255 | if (error) { |
| 256 | if (byte2 != SMS_DBD) { |
| 257 | byte2 = SMS_DBD; |
| 258 | goto again; |
| 259 | } |
| 260 | /* Try a different page? */ |
| 261 | if (page == (SMS_PCTRL_CURRENT | 0xf)) { |
| 262 | page = SMS_PCTRL_CURRENT | 0x10; |
| 263 | byte2 = 0; |
| 264 | goto again; |
| 265 | } |
| 266 | return error; |
| 267 | } |
| 268 | |
| 269 | if (scsi_pdata.header.blk_desc_len) |
| 270 | ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata; |
| 271 | else |
| 272 | ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc; |
| 273 | |
| 274 | if ((page & SMS_PAGE_MASK) == 0xf) { |
| 275 | cptr = (struct scsi_tape_dev_compression_page *) ptr; |
| 276 | ison = (cptr->dce_dcc & DCP_DCE) != 0; |
| 277 | if (onoff) |
| 278 | cptr->dce_dcc |= DCP_DCE; |
| 279 | else |
| 280 | cptr->dce_dcc &= ~DCP_DCE; |
| 281 | cptr->pagecode &= ~0x80; |
| 282 | } else { |
| 283 | ison = (ptr->sel_comp_alg != 0); |
| 284 | if (onoff) |
| 285 | ptr->sel_comp_alg = 1; |
| 286 | else |
| 287 | ptr->sel_comp_alg = 0; |
| 288 | ptr->pagecode &= ~0x80; |
| 289 | ptr->byte2 = 0; |
| 290 | ptr->active_partition = 0; |
| 291 | ptr->wb_full_ratio = 0; |
| 292 | ptr->rb_empty_ratio = 0; |
| 293 | ptr->byte8 &= ~0x30; |
| 294 | ptr->gap_size = 0; |
| 295 | ptr->byte10 &= ~0xe7; |
| 296 | ptr->ew_bufsize[0] = 0; |
| 297 | ptr->ew_bufsize[1] = 0; |
| 298 | ptr->ew_bufsize[2] = 0; |
| 299 | ptr->reserved = 0; |
| 300 | } |
| 301 | /* |
| 302 | * There might be a virtue in actually doing the MODE SELECTS, |
| 303 | * but let's not clog the bus over it. |
| 304 | */ |
| 305 | if (onoff == ison) |
| 306 | return 0; |
| 307 | |
| 308 | /* Set up for a mode select */ |
| 309 | scsi_pdata.header.data_length = 0; |
| 310 | scsi_pdata.header.medium_type = 0; |
| 311 | if ((st->flags & ST_DONTBUFFER) == 0) |
| 312 | scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON; |
| 313 | else |
| 314 | scsi_pdata.header.dev_spec = 0; |
| 315 | |
| 316 | if (scsi_pdata.header.blk_desc_len) { |
| 317 | scsi_pdata.blk_desc.density = 0; |
| 318 | scsi_pdata.blk_desc.nblocks[0] = 0; |
| 319 | scsi_pdata.blk_desc.nblocks[1] = 0; |
| 320 | scsi_pdata.blk_desc.nblocks[2] = 0; |
| 321 | } |
| 322 | |
| 323 | /* Do the command */ |
| 324 | error = scsipi_mode_select(periph, SMS_PF, &scsi_pdata.header, |
| 325 | scsi_dlen, flags, ST_RETRIES, ST_CTL_TIME); |
| 326 | |
| 327 | if (error && (page & SMS_PAGE_MASK) == 0xf) { |
| 328 | /* Try DEVICE CONFIGURATION page. */ |
| 329 | page = SMS_PCTRL_CURRENT | 0x10; |
| 330 | goto again; |
| 331 | } |
| 332 | return error; |
| 333 | } |
| 334 | |