1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <stdio.h> 29 #include <sys/types.h> 30 #include <sys/scsi/impl/uscsi.h> 31 #include <string.h> 32 #include <unistd.h> 33 #include <errno.h> 34 #include <libintl.h> 35 36 #include "transport.h" 37 #include "main.h" 38 #include "util.h" 39 #include "mmc.h" 40 41 char rqbuf[RQBUFLEN]; 42 uchar_t uscsi_status, rqstatus, rqresid; 43 static struct uscsi_cmd uscmd; 44 static char ucdb[16]; 45 static uint_t total_retries; 46 47 struct uscsi_cmd * 48 get_uscsi_cmd(void) 49 { 50 (void) memset(&uscmd, 0, sizeof (uscmd)); 51 (void) memset(ucdb, 0, 16); 52 uscmd.uscsi_cdb = ucdb; 53 return (&uscmd); 54 } 55 56 int 57 uscsi(int fd, struct uscsi_cmd *scmd) 58 { 59 int ret, global_rqsense; 60 int retries, max_retries; 61 62 /* set up for request sense extensions */ 63 if (!(scmd->uscsi_flags & USCSI_RQENABLE)) { 64 scmd->uscsi_flags |= USCSI_RQENABLE; 65 scmd->uscsi_rqlen = RQBUFLEN; 66 scmd->uscsi_rqbuf = rqbuf; 67 global_rqsense = 1; 68 } else { 69 global_rqsense = 0; 70 } 71 72 /* 73 * Some DVD drives may have a delay for writing or sync cache, and 74 * read media info (done after syncing cache). This can take a 75 * significant number of time. Such as the Pioneer A0X which will 76 * generate TOC after the cache is full in the middle of writing. 77 */ 78 79 if ((device_type != CD_RW) && ((scmd->uscsi_cdb[0] == WRITE_10_CMD) || 80 (scmd->uscsi_cdb[0] == READ_INFO_CMD) || (scmd->uscsi_cdb[0] == 81 SYNC_CACHE_CMD) || (scmd->uscsi_cdb[0] == CLOSE_TRACK_CMD))) { 82 83 max_retries = 500; 84 } else { 85 /* 86 * Pioneer A08/A09 retries approx 30 times. 87 */ 88 max_retries = 40; 89 } 90 91 /* 92 * The device may be busy or slow and fail with a not ready status. 93 * we'll allow a limited number of retries to give the drive time 94 * to recover. 95 */ 96 for (retries = 0; retries < max_retries; retries++) { 97 98 scmd->uscsi_status = 0; 99 100 if (global_rqsense) 101 (void) memset(rqbuf, 0, RQBUFLEN); 102 103 if (debug && verbose) { 104 int i; 105 106 (void) printf("cmd:["); 107 for (i = 0; i < scmd->uscsi_cdblen; i++) 108 (void) printf("0x%02x ", 109 (uchar_t)scmd->uscsi_cdb[i]); 110 (void) printf("]\n"); 111 } 112 113 /* 114 * We need to have root privledges in order to use 115 * uscsi commands on the device. 116 */ 117 118 raise_priv(); 119 ret = ioctl(fd, USCSICMD, scmd); 120 lower_priv(); 121 122 /* maintain consistency in case of sgen */ 123 if ((ret == 0) && (scmd->uscsi_status == 2)) { 124 ret = -1; 125 errno = EIO; 126 } 127 128 /* if error and extended request sense, retrieve errors */ 129 if (global_rqsense && (ret < 0) && (scmd->uscsi_status == 2)) { 130 /* 131 * The drive is not ready to recieve commands but 132 * may be in the process of becoming ready. 133 * sleep for a short time then retry command. 134 * SENSE/ASC = 2/4 : not ready 135 * ASCQ = 0 Not Reportable. 136 * ASCQ = 1 Becoming ready. 137 * ASCQ = 4 FORMAT in progress. 138 * ASCQ = 7 Operation in progress. 139 * ASCQ = 8 Long write in progress. 140 */ 141 if ((SENSE_KEY(rqbuf) == 2) && (ASC(rqbuf) == 4) && 142 ((ASCQ(rqbuf) == 0) || (ASCQ(rqbuf) == 1) || 143 (ASCQ(rqbuf) == 4)) || (ASCQ(rqbuf) == 7)) { 144 total_retries++; 145 (void) sleep(3); 146 continue; 147 } 148 149 /* 150 * we do not print this out under normal circumstances 151 * since we have BUFE enabled and do not want to alarm 152 * users with uneccessary messages. 153 */ 154 if (debug) { 155 if ((SENSE_KEY(rqbuf) == 5) && (ASC(rqbuf) == 156 0x21) && (ASCQ(rqbuf) == 2)) { 157 (void) printf(gettext( 158 "Buffer underrun occurred! trying to recover...\n")); 159 } 160 } 161 162 /* 163 * long write operation in progress, ms_delay is 164 * used for some fast drives with a short drive 165 * buffer. Such as Pioneer DVD-RW drives. They will 166 * begin to generate TOC when the buffer is initially 167 * full, then resume operation a few minutes later 168 * with the buffer emptying quickly. 169 */ 170 if ((SENSE_KEY(rqbuf) == 2) && (ASC(rqbuf) == 4) && 171 (ASCQ(rqbuf) == 8)) { 172 total_retries++; 173 if ((device_type != CD_RW) && 174 (scmd->uscsi_cdb[0] == CLOSE_TRACK_CMD)) 175 (void) sleep(3); 176 else 177 ms_delay(500); 178 continue; 179 } 180 /* 181 * Device is not ready to transmit or a device reset 182 * has occurred. wait for a short period of time then 183 * retry the command. 184 */ 185 if ((SENSE_KEY(rqbuf) == 6) && ((ASC(rqbuf) == 0x28) || 186 (ASC(rqbuf) == 0x29))) { 187 (void) sleep(3); 188 total_retries++; 189 continue; 190 } 191 192 if ((SENSE_KEY(rqbuf) == 5) && 193 (device_type == DVD_PLUS || 194 device_type == DVD_PLUS_W)) { 195 if (scmd->uscsi_cdb[0] == MODE_SELECT_10_CMD && 196 ASC(rqbuf) == 0x26) { 197 ret = 1; 198 break; 199 } 200 201 if (scmd->uscsi_cdb[0] == REZERO_UNIT_CMD && 202 ASC(rqbuf) == 0x20) { 203 ret = 1; 204 break; 205 } 206 207 } 208 /* 209 * Blank Sense, we don't know what the error is or if 210 * the command succeeded, Hope for the best. Some 211 * drives return blank sense periodically and will 212 * fail if this is removed. 213 */ 214 if ((SENSE_KEY(rqbuf) == 0) && (ASC(rqbuf) == 0) && 215 (ASCQ(rqbuf) == 0)) { 216 ret = 0; 217 break; 218 } 219 220 if (debug) { 221 (void) printf("cmd: 0x%02x ret:%i status:%02x " 222 " sense: %02x ASC: %02x ASCQ:%02x\n", 223 (uchar_t)scmd->uscsi_cdb[0], ret, 224 scmd->uscsi_status, 225 (uchar_t)SENSE_KEY(rqbuf), 226 (uchar_t)ASC(rqbuf), (uchar_t)ASCQ(rqbuf)); 227 } 228 } 229 230 /* no errors we'll return */ 231 break; 232 } 233 234 /* store the error status for later debug printing */ 235 if ((ret < 0) && (global_rqsense)) { 236 uscsi_status = scmd->uscsi_status; 237 rqstatus = scmd->uscsi_rqstatus; 238 rqresid = scmd->uscsi_rqresid; 239 240 } 241 242 if (debug && retries) { 243 (void) printf("total retries: %d\n", total_retries); 244 } 245 246 return (ret); 247 } 248