1 /* $NetBSD: scsi_base.c,v 1.81 2004/09/09 19:35:30 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: scsi_base.c,v 1.81 2004/09/09 19:35:30 bouyer Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/buf.h> 46 #include <sys/uio.h> 47 #include <sys/malloc.h> 48 #include <sys/errno.h> 49 #include <sys/device.h> 50 #include <sys/proc.h> 51 52 #include <dev/scsipi/scsipi_all.h> 53 #include <dev/scsipi/scsi_all.h> 54 #include <dev/scsipi/scsi_disk.h> 55 #include <dev/scsipi/scsiconf.h> 56 #include <dev/scsipi/scsipi_base.h> 57 58 /* 59 * Do a scsi operation, asking a device to run as SCSI-II if it can. 60 */ 61 int 62 scsi_change_def(struct scsipi_periph *periph, int flags) 63 { 64 struct scsi_changedef scsipi_cmd; 65 66 memset(&scsipi_cmd, 0, sizeof(scsipi_cmd)); 67 scsipi_cmd.opcode = SCSI_CHANGE_DEFINITION; 68 scsipi_cmd.how = SC_SCSI_2; 69 70 return (scsipi_command(periph, NULL, 71 (struct scsipi_generic *) &scsipi_cmd, sizeof(scsipi_cmd), 72 0, 0, SCSIPIRETRIES, 100000, NULL, flags)); 73 } 74 75 /* 76 * ask the scsi driver to perform a command for us. 77 * tell it where to read/write the data, and how 78 * long the data is supposed to be. If we have a buf 79 * to associate with the transfer, we need that too. 80 */ 81 int 82 scsi_scsipi_cmd(struct scsipi_periph *periph, struct scsipi_xfer *xs, 83 struct scsipi_generic *scsipi_cmd, int cmdlen, void *data, size_t datalen, 84 int retries, int timeout, struct buf *bp, int flags) 85 { 86 int error; 87 88 SC_DEBUG(periph, SCSIPI_DB2, ("scsi_scsipi_cmd\n")); 89 90 #ifdef DIAGNOSTIC 91 if (bp != NULL && (flags & XS_CTL_ASYNC) == 0) 92 panic("scsi_scsipi_cmd: buffer without async"); 93 #endif 94 95 if (xs == NULL) { 96 if ((xs = scsipi_make_xs(periph, scsipi_cmd, cmdlen, data, 97 datalen, retries, timeout, bp, flags)) == NULL) { 98 /* let the caller deal with this */ 99 return (ENOMEM); 100 } 101 } 102 103 /* 104 * Set the LUN in the CDB if we have an older device. We also 105 * set it for more modern SCSI-2 devices "just in case". 106 */ 107 if (periph->periph_version <= 2) 108 xs->cmd->bytes[0] |= 109 ((periph->periph_lun << SCSI_CMD_LUN_SHIFT) & 110 SCSI_CMD_LUN_MASK); 111 112 if ((error = scsipi_execute_xs(xs)) == EJUSTRETURN) 113 return (0); 114 return (error); 115 } 116 117 /* 118 * Utility routines often used in SCSI stuff 119 */ 120 121 /* 122 * Print out the periph's address info. 123 */ 124 void 125 scsi_print_addr(struct scsipi_periph *periph) 126 { 127 struct scsipi_channel *chan = periph->periph_channel; 128 struct scsipi_adapter *adapt = chan->chan_adapter; 129 130 printf("%s(%s:%d:%d:%d): ", periph->periph_dev != NULL ? 131 periph->periph_dev->dv_xname : "probe", 132 adapt->adapt_dev->dv_xname, 133 chan->chan_channel, periph->periph_target, 134 periph->periph_lun); 135 } 136 137 /* 138 * Kill off all pending xfers for a periph. 139 * 140 * Must be called at splbio(). 141 */ 142 void 143 scsi_kill_pending(struct scsipi_periph *periph) 144 { 145 } 146