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 2004 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 max_retries = 20; 87 } 88 89 /* 90 * The device may be busy or slow and fail with a not ready status. 91 * we'll allow a limited number of retries to give the drive time 92 * to recover. 93 */ 94 for (retries = 0; retries < max_retries; retries++) { 95 96 scmd->uscsi_status = 0; 97 98 if (global_rqsense) 99 (void) memset(rqbuf, 0, RQBUFLEN); 100 101 if (debug && verbose) { 102 int i; 103 104 (void) printf("cmd:["); 105 for (i = 0; i < scmd->uscsi_cdblen; i++) 106 (void) printf("0x%02x ", 107 (uchar_t)scmd->uscsi_cdb[i]); 108 (void) printf("]\n"); 109 } 110 111 /* 112 * We need to have root privledges in order to use 113 * uscsi commands on the device. 114 */ 115 116 raise_priv(); 117 ret = ioctl(fd, USCSICMD, scmd); 118 lower_priv(); 119 120 /* maintain consistency in case of sgen */ 121 if ((ret == 0) && (scmd->uscsi_status == 2)) { 122 ret = -1; 123 errno = EIO; 124 } 125 126 /* if error and extended request sense, retrieve errors */ 127 if (global_rqsense && (ret < 0) && (scmd->uscsi_status == 2)) { 128 /* 129 * The drive is not ready to recieve commands but 130 * may be in the process of becoming ready. 131 * sleep for a short time then retry command. 132 * SENSE/ASC = 2/4 : not ready 133 * ASCQ = 0 Not Reportable. 134 * ASCQ = 1 Becoming ready. 135 * ASCQ = 4 FORMAT in progress. 136 * ASCQ = 7 Operation in progress. 137 * ASCQ = 8 Long write in progress. 138 */ 139 if ((SENSE_KEY(rqbuf) == 2) && (ASC(rqbuf) == 4) && 140 ((ASCQ(rqbuf) == 0) || (ASCQ(rqbuf) == 1) || 141 (ASCQ(rqbuf) == 4)) || (ASCQ(rqbuf) == 7)) { 142 total_retries++; 143 (void) sleep(3); 144 continue; 145 } 146 147 /* 148 * we do not print this out under normal circumstances 149 * since we have BUFE enabled and do not want to alarm 150 * users with uneccessary messages. 151 */ 152 if (debug) { 153 if ((SENSE_KEY(rqbuf) == 5) && (ASC(rqbuf) == 154 0x21) && (ASCQ(rqbuf) == 2)) { 155 (void) printf(gettext( 156 "Buffer underrun occurred! trying to recover...\n")); 157 } 158 } 159 160 /* 161 * long write operation in progress, ms_delay is 162 * used for some fast drives with a short drive 163 * buffer. Such as Pioneer DVD-RW drives. They will 164 * begin to generate TOC when the buffer is initially 165 * full, then resume operation a few minutes later 166 * with the buffer emptying quickly. 167 */ 168 if ((SENSE_KEY(rqbuf) == 2) && (ASC(rqbuf) == 4) && 169 (ASCQ(rqbuf) == 8)) { 170 total_retries++; 171 ms_delay(500); 172 continue; 173 } 174 /* 175 * Device is not ready to transmit or a device reset 176 * has occurred. wait for a short period of time then 177 * retry the command. 178 */ 179 if ((SENSE_KEY(rqbuf) == 6) && ((ASC(rqbuf) == 0x28) || 180 (ASC(rqbuf) == 0x29))) { 181 (void) sleep(3); 182 total_retries++; 183 continue; 184 } 185 /* 186 * Blank Sense, we don't know what the error is or if 187 * the command succeeded, Hope for the best. Some 188 * drives return blank sense periodically and will 189 * fail if this is removed. 190 */ 191 if ((SENSE_KEY(rqbuf) == 0) && (ASC(rqbuf) == 0) && 192 (ASCQ(rqbuf) == 0)) { 193 ret = 0; 194 break; 195 } 196 197 if (debug) { 198 (void) printf("cmd: 0x%02x ret:%i status:%02x " 199 " sense: %02x ASC: %02x ASCQ:%02x\n", 200 (uchar_t)scmd->uscsi_cdb[0], ret, 201 scmd->uscsi_status, 202 (uchar_t)SENSE_KEY(rqbuf), 203 (uchar_t)ASC(rqbuf), (uchar_t)ASCQ(rqbuf)); 204 } 205 } 206 207 /* no errors we'll return */ 208 break; 209 } 210 211 /* store the error status for later debug printing */ 212 if ((ret < 0) && (global_rqsense)) { 213 uscsi_status = scmd->uscsi_status; 214 rqstatus = scmd->uscsi_rqstatus; 215 rqresid = scmd->uscsi_rqresid; 216 217 } 218 219 if (debug && retries) { 220 (void) printf("total retries: %d\n", total_retries); 221 } 222 223 return (ret); 224 } 225