1 /* 2 * SCSI Target Emulator 3 * 4 * Copyright (c) 2002 Nate Lawson. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification, immediately at the beginning of the file. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: src/share/examples/scsi_target/scsi_target.h,v 1.1.4.1 2003/02/18 22:07:10 njl Exp $ 29 * $DragonFly: src/share/examples/scsi_target/scsi_target.h,v 1.2 2003/06/17 04:36:57 dillon Exp $ 30 */ 31 32 #ifndef _SCSI_TARGET_H 33 #define _SCSI_TARGET_H 34 35 /* 36 * Maximum number of parallel commands to accept 37 * Set to 256 for Fibre Channel (SPI is 16) 38 */ 39 #define MAX_INITIATORS 16 40 #define SECTOR_SIZE 512 41 #define MAX_EVENTS (MAX_INITIATORS + 5) 42 /* kqueue for AIO, signals */ 43 44 /* Additional SCSI 3 defines for inquiry response */ 45 #define SID_Addr16 0x0100 46 47 TAILQ_HEAD(io_queue, ccb_hdr); 48 49 /* Offset into the private CCB area for storing our descriptor */ 50 #define targ_descr periph_priv.entries[1].ptr 51 52 /* Descriptor attached to each ATIO */ 53 struct atio_descr { 54 off_t base_off; /* Base offset for ATIO */ 55 size_t total_len; /* Total xfer len for this ATIO */ 56 size_t init_req; /* Transfer count requested to/from init */ 57 size_t init_ack; /* Data transferred ok to/from init */ 58 size_t targ_req; /* Transfer count requested to/from target */ 59 size_t targ_ack; /* Data transferred ok to/from target */ 60 int flags; /* Flags for CTIOs */ 61 u_int8_t *cdb; /* Pointer to received CDB */ 62 /* List of completed AIO/CTIOs */ 63 struct io_queue cmplt_io; 64 }; 65 66 typedef enum { 67 ATIO_WORK, 68 AIO_DONE, 69 CTIO_DONE 70 } io_ops; 71 72 /* Descriptor attached to each CTIO */ 73 struct ctio_descr { 74 void *buf; /* Backing store */ 75 off_t offset; /* Position in transfer (for file, */ 76 /* doesn't start at 0) */ 77 struct aiocb aiocb; /* AIO descriptor for this CTIO */ 78 struct ccb_accept_tio *atio; 79 /* ATIO we are satisfying */ 80 io_ops event; /* Event that queued this CTIO */ 81 }; 82 83 typedef enum { 84 UA_NONE = 0x00, 85 UA_POWER_ON = 0x01, 86 UA_BUS_RESET = 0x02, 87 UA_BDR = 0x04 88 } ua_types; 89 90 typedef enum { 91 CA_NONE = 0x00, 92 CA_UNIT_ATTN = 0x01, 93 CA_CMD_SENSE = 0x02 94 } ca_types; 95 96 struct initiator_state { 97 ua_types orig_ua; 98 ca_types orig_ca; 99 ua_types pending_ua; 100 ca_types pending_ca; 101 struct scsi_sense_data sense_data; 102 }; 103 104 /* Global functions */ 105 extern cam_status tcmd_init(u_int16_t req_inq_flags, 106 u_int16_t sim_inq_flags); 107 extern int tcmd_handle(struct ccb_accept_tio *atio, 108 struct ccb_scsiio *ctio, io_ops event); 109 extern void tcmd_sense(u_int init_id, struct ccb_scsiio *ctio, 110 u_int8_t flags, 111 u_int8_t asc, u_int8_t ascq); 112 extern void tcmd_ua(u_int init_id, ua_types new_ua); 113 extern int work_atio(struct ccb_accept_tio *atio); 114 extern void send_ccb(union ccb *ccb, int priority); 115 extern void free_ccb(union ccb *ccb); 116 static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); } 117 118 #endif /* _SCSI_TARGET_H */ 119