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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <stdio.h> 30 #include <sys/types.h> 31 #include <sys/scsi/impl/uscsi.h> 32 #include <string.h> 33 #include <unistd.h> 34 #include <errno.h> 35 #include <libintl.h> 36 37 #include "transport.h" 38 #include "main.h" 39 #include "util.h" 40 #include "mmc.h" 41 42 char rqbuf[RQBUFLEN]; 43 uchar_t uscsi_status, rqstatus, rqresid; 44 static struct uscsi_cmd uscmd; 45 static char ucdb[16]; 46 static uint_t total_retries; 47 48 struct uscsi_cmd * 49 get_uscsi_cmd(void) 50 { 51 (void) memset(&uscmd, 0, sizeof (uscmd)); 52 (void) memset(ucdb, 0, 16); 53 uscmd.uscsi_cdb = ucdb; 54 return (&uscmd); 55 } 56 57 int 58 uscsi(int fd, struct uscsi_cmd *scmd) 59 { 60 int ret, global_rqsense; 61 int retries, max_retries; 62 63 /* set up for request sense extensions */ 64 if (!(scmd->uscsi_flags & USCSI_RQENABLE)) { 65 scmd->uscsi_flags |= USCSI_RQENABLE; 66 scmd->uscsi_rqlen = RQBUFLEN; 67 scmd->uscsi_rqbuf = rqbuf; 68 global_rqsense = 1; 69 } else { 70 global_rqsense = 0; 71 } 72 73 /* 74 * Some DVD drives may have a delay for writing or sync cache, and 75 * read media info (done after syncing cache). This can take a 76 * significant number of time. Such as the Pioneer A0X which will 77 * generate TOC after the cache is full in the middle of writing. 78 */ 79 80 if ((device_type != CD_RW) && ((scmd->uscsi_cdb[0] == WRITE_10_CMD) || 81 (scmd->uscsi_cdb[0] == READ_INFO_CMD) || (scmd->uscsi_cdb[0] == 82 SYNC_CACHE_CMD) || (scmd->uscsi_cdb[0] == CLOSE_TRACK_CMD))) { 83 84 max_retries = 500; 85 } else { 86 /* 87 * Pioneer A08/A09 retries approx 30 times. 88 */ 89 max_retries = 40; 90 } 91 92 /* 93 * The device may be busy or slow and fail with a not ready status. 94 * we'll allow a limited number of retries to give the drive time 95 * to recover. 96 */ 97 for (retries = 0; retries < max_retries; retries++) { 98 99 scmd->uscsi_status = 0; 100 101 if (global_rqsense) 102 (void) memset(rqbuf, 0, RQBUFLEN); 103 104 if (debug && verbose) { 105 int i; 106 107 (void) printf("cmd:["); 108 for (i = 0; i < scmd->uscsi_cdblen; i++) 109 (void) printf("0x%02x ", 110 (uchar_t)scmd->uscsi_cdb[i]); 111 (void) printf("]\n"); 112 } 113 114 /* 115 * We need to have root privledges in order to use 116 * uscsi commands on the device. 117 */ 118 119 raise_priv(); 120 ret = ioctl(fd, USCSICMD, scmd); 121 lower_priv(); 122 123 /* maintain consistency in case of sgen */ 124 if ((ret == 0) && (scmd->uscsi_status == 2)) { 125 ret = -1; 126 errno = EIO; 127 } 128 129 /* if error and extended request sense, retrieve errors */ 130 if (global_rqsense && (ret < 0) && (scmd->uscsi_status == 2)) { 131 /* 132 * The drive is not ready to recieve commands but 133 * may be in the process of becoming ready. 134 * sleep for a short time then retry command. 135 * SENSE/ASC = 2/4 : not ready 136 * ASCQ = 0 Not Reportable. 137 * ASCQ = 1 Becoming ready. 138 * ASCQ = 4 FORMAT in progress. 139 * ASCQ = 7 Operation in progress. 140 * ASCQ = 8 Long write in progress. 141 */ 142 if ((SENSE_KEY(rqbuf) == 2) && (ASC(rqbuf) == 4) && 143 ((ASCQ(rqbuf) == 0) || (ASCQ(rqbuf) == 1) || 144 (ASCQ(rqbuf) == 4)) || (ASCQ(rqbuf) == 7)) { 145 total_retries++; 146 (void) sleep(3); 147 continue; 148 } 149 150 /* 151 * we do not print this out under normal circumstances 152 * since we have BUFE enabled and do not want to alarm 153 * users with uneccessary messages. 154 */ 155 if (debug) { 156 if ((SENSE_KEY(rqbuf) == 5) && (ASC(rqbuf) == 157 0x21) && (ASCQ(rqbuf) == 2)) { 158 (void) printf(gettext( 159 "Buffer underrun occurred! trying to recover...\n")); 160 } 161 } 162 163 /* 164 * long write operation in progress, ms_delay is 165 * used for some fast drives with a short drive 166 * buffer. Such as Pioneer DVD-RW drives. They will 167 * begin to generate TOC when the buffer is initially 168 * full, then resume operation a few minutes later 169 * with the buffer emptying quickly. 170 */ 171 if ((SENSE_KEY(rqbuf) == 2) && (ASC(rqbuf) == 4) && 172 (ASCQ(rqbuf) == 8)) { 173 total_retries++; 174 if ((device_type != CD_RW) && 175 (scmd->uscsi_cdb[0] == CLOSE_TRACK_CMD)) 176 (void) sleep(3); 177 else 178 ms_delay(500); 179 continue; 180 } 181 /* 182 * Device is not ready to transmit or a device reset 183 * has occurred. wait for a short period of time then 184 * retry the command. 185 */ 186 if ((SENSE_KEY(rqbuf) == 6) && ((ASC(rqbuf) == 0x28) || 187 (ASC(rqbuf) == 0x29))) { 188 (void) sleep(3); 189 total_retries++; 190 continue; 191 } 192 /* 193 * Blank Sense, we don't know what the error is or if 194 * the command succeeded, Hope for the best. Some 195 * drives return blank sense periodically and will 196 * fail if this is removed. 197 */ 198 if ((SENSE_KEY(rqbuf) == 0) && (ASC(rqbuf) == 0) && 199 (ASCQ(rqbuf) == 0)) { 200 ret = 0; 201 break; 202 } 203 204 if (debug) { 205 (void) printf("cmd: 0x%02x ret:%i status:%02x " 206 " sense: %02x ASC: %02x ASCQ:%02x\n", 207 (uchar_t)scmd->uscsi_cdb[0], ret, 208 scmd->uscsi_status, 209 (uchar_t)SENSE_KEY(rqbuf), 210 (uchar_t)ASC(rqbuf), (uchar_t)ASCQ(rqbuf)); 211 } 212 } 213 214 /* no errors we'll return */ 215 break; 216 } 217 218 /* store the error status for later debug printing */ 219 if ((ret < 0) && (global_rqsense)) { 220 uscsi_status = scmd->uscsi_status; 221 rqstatus = scmd->uscsi_rqstatus; 222 rqresid = scmd->uscsi_rqresid; 223 224 } 225 226 if (debug && retries) { 227 (void) printf("total retries: %d\n", total_retries); 228 } 229 230 return (ret); 231 } 232