FreeBSD/Linux Kernel Cross Reference
sys/cam/cam.h
1 /*-
2 * Data structures and definitions for the CAM system.
3 *
4 * Copyright (c) 1997 Justin T. Gibbs.
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: releng/6.2/sys/cam/cam.h 139743 2005-01-05 22:34:37Z imp $
29 */
30
31 #ifndef _CAM_CAM_H
32 #define _CAM_CAM_H 1
33
34 #ifdef _KERNEL
35 #include <opt_cam.h>
36 #endif
37
38 #include <sys/cdefs.h>
39
40 typedef u_int path_id_t;
41 typedef u_int target_id_t;
42 typedef u_int lun_id_t;
43
44 #define CAM_XPT_PATH_ID ((path_id_t)~0)
45 #define CAM_BUS_WILDCARD ((path_id_t)~0)
46 #define CAM_TARGET_WILDCARD ((target_id_t)~0)
47 #define CAM_LUN_WILDCARD ((lun_id_t)~0)
48
49 /*
50 * Maximum length for a CAM CDB.
51 */
52 #define CAM_MAX_CDBLEN 16
53
54 /*
55 * Definition of a CAM peripheral driver entry. Peripheral drivers instantiate
56 * one of these for each device they wish to communicate with and pass it into
57 * the xpt layer when they wish to schedule work on that device via the
58 * xpt_schedule API.
59 */
60 struct cam_periph;
61
62 /*
63 * Priority information for a CAM structure. The generation number is
64 * incremented everytime a new entry is entered into the queue giving round
65 * robin per priority level scheduling.
66 */
67 typedef struct {
68 u_int32_t priority;
69 #define CAM_PRIORITY_NONE (u_int32_t)-1
70 u_int32_t generation;
71 int index;
72 #define CAM_UNQUEUED_INDEX -1
73 #define CAM_ACTIVE_INDEX -2
74 #define CAM_DONEQ_INDEX -3
75 } cam_pinfo;
76
77 /*
78 * Macro to compare two generation numbers. It is used like this:
79 *
80 * if (GENERATIONCMP(a, >=, b))
81 * ...;
82 *
83 * GERERATIONCMP uses modular arithmetic to guard against wraps
84 * wraps in the generation number.
85 */
86 #define GENERATIONCMP(x, op, y) ((int32_t)((x) - (y)) op 0)
87
88 /* CAM flags XXX Move to cam_periph.h ??? */
89 typedef enum {
90 CAM_FLAG_NONE = 0x00,
91 CAM_EXPECT_INQ_CHANGE = 0x01,
92 CAM_RETRY_SELTO = 0x02 /* Retry Selection Timeouts */
93 } cam_flags;
94
95 /* CAM Status field values */
96 typedef enum {
97 CAM_REQ_INPROG, /* CCB request is in progress */
98 CAM_REQ_CMP, /* CCB request completed without error */
99 CAM_REQ_ABORTED, /* CCB request aborted by the host */
100 CAM_UA_ABORT, /* Unable to abort CCB request */
101 CAM_REQ_CMP_ERR, /* CCB request completed with an error */
102 CAM_BUSY, /* CAM subsystem is busy */
103 CAM_REQ_INVALID, /* CCB request was invalid */
104 CAM_PATH_INVALID, /* Supplied Path ID is invalid */
105 CAM_DEV_NOT_THERE, /* SCSI Device Not Installed/there */
106 CAM_UA_TERMIO, /* Unable to terminate I/O CCB request */
107 CAM_SEL_TIMEOUT, /* Target Selection Timeout */
108 CAM_CMD_TIMEOUT, /* Command timeout */
109 CAM_SCSI_STATUS_ERROR, /* SCSI error, look at error code in CCB */
110 CAM_MSG_REJECT_REC, /* Message Reject Received */
111 CAM_SCSI_BUS_RESET, /* SCSI Bus Reset Sent/Received */
112 CAM_UNCOR_PARITY, /* Uncorrectable parity error occurred */
113 CAM_AUTOSENSE_FAIL = 0x10,/* Autosense: request sense cmd fail */
114 CAM_NO_HBA, /* No HBA Detected error */
115 CAM_DATA_RUN_ERR, /* Data Overrun error */
116 CAM_UNEXP_BUSFREE, /* Unexpected Bus Free */
117 CAM_SEQUENCE_FAIL, /* Target Bus Phase Sequence Failure */
118 CAM_CCB_LEN_ERR, /* CCB length supplied is inadequate */
119 CAM_PROVIDE_FAIL, /* Unable to provide requested capability */
120 CAM_BDR_SENT, /* A SCSI BDR msg was sent to target */
121 CAM_REQ_TERMIO, /* CCB request terminated by the host */
122 CAM_UNREC_HBA_ERROR, /* Unrecoverable Host Bus Adapter Error */
123 CAM_REQ_TOO_BIG, /* The request was too large for this host */
124 CAM_REQUEUE_REQ, /*
125 * This request should be requeued to preserve
126 * transaction ordering. This typically occurs
127 * when the SIM recognizes an error that should
128 * freeze the queue and must place additional
129 * requests for the target at the sim level
130 * back into the XPT queue.
131 */
132 CAM_IDE = 0x33, /* Initiator Detected Error */
133 CAM_RESRC_UNAVAIL, /* Resource Unavailable */
134 CAM_UNACKED_EVENT, /* Unacknowledged Event by Host */
135 CAM_MESSAGE_RECV, /* Message Received in Host Target Mode */
136 CAM_INVALID_CDB, /* Invalid CDB received in Host Target Mode */
137 CAM_LUN_INVALID, /* Lun supplied is invalid */
138 CAM_TID_INVALID, /* Target ID supplied is invalid */
139 CAM_FUNC_NOTAVAIL, /* The requested function is not available */
140 CAM_NO_NEXUS, /* Nexus is not established */
141 CAM_IID_INVALID, /* The initiator ID is invalid */
142 CAM_CDB_RECVD, /* The SCSI CDB has been received */
143 CAM_LUN_ALRDY_ENA, /* The LUN is already enabled for target mode */
144 CAM_SCSI_BUSY, /* SCSI Bus Busy */
145
146 CAM_DEV_QFRZN = 0x40, /* The DEV queue is frozen w/this err */
147
148 /* Autosense data valid for target */
149 CAM_AUTOSNS_VALID = 0x80,
150 CAM_RELEASE_SIMQ = 0x100,/* SIM ready to take more commands */
151 CAM_SIM_QUEUED = 0x200,/* SIM has this command in it's queue */
152
153 CAM_STATUS_MASK = 0x3F, /* Mask bits for just the status # */
154
155 /* Target Specific Adjunct Status */
156 CAM_SENT_SENSE = 0x40000000 /* sent sense with status */
157 } cam_status;
158
159 typedef enum {
160 CAM_ESF_NONE = 0x00,
161 CAM_ESF_COMMAND = 0x01,
162 CAM_ESF_CAM_STATUS = 0x02,
163 CAM_ESF_PROTO_STATUS = 0x04,
164 CAM_ESF_ALL = 0xff
165 } cam_error_string_flags;
166
167 typedef enum {
168 CAM_EPF_NONE = 0x00,
169 CAM_EPF_MINIMAL = 0x01,
170 CAM_EPF_NORMAL = 0x02,
171 CAM_EPF_ALL = 0x03,
172 CAM_EPF_LEVEL_MASK = 0x0f
173 /* All bits above bit 3 are protocol-specific */
174 } cam_error_proto_flags;
175
176 typedef enum {
177 CAM_ESF_PRINT_NONE = 0x00,
178 CAM_ESF_PRINT_STATUS = 0x10,
179 CAM_ESF_PRINT_SENSE = 0x20
180 } cam_error_scsi_flags;
181
182 struct cam_status_entry
183 {
184 cam_status status_code;
185 const char *status_text;
186 };
187
188 extern const struct cam_status_entry cam_status_table[];
189 extern const int num_cam_status_entries;
190 union ccb;
191
192 #ifdef SYSCTL_DECL /* from sysctl.h */
193 SYSCTL_DECL(_kern_cam);
194 #endif
195
196 __BEGIN_DECLS
197 typedef int (cam_quirkmatch_t)(caddr_t, caddr_t);
198
199 caddr_t cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries,
200 int entry_size, cam_quirkmatch_t *comp_func);
201
202 void cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen);
203
204 int cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len);
205 const struct cam_status_entry*
206 cam_fetch_status_entry(cam_status status);
207 #ifdef _KERNEL
208 char * cam_error_string(union ccb *ccb, char *str, int str_len,
209 cam_error_string_flags flags,
210 cam_error_proto_flags proto_flags);
211 void cam_error_print(union ccb *ccb, cam_error_string_flags flags,
212 cam_error_proto_flags proto_flags);
213 #else /* _KERNEL */
214 struct cam_device;
215
216 char * cam_error_string(struct cam_device *device, union ccb *ccb, char *str,
217 int str_len, cam_error_string_flags flags,
218 cam_error_proto_flags proto_flags);
219 void cam_error_print(struct cam_device *device, union ccb *ccb,
220 cam_error_string_flags flags,
221 cam_error_proto_flags proto_flags, FILE *ofile);
222 #endif /* _KERNEL */
223 __END_DECLS
224
225 #ifdef _KERNEL
226 static __inline void cam_init_pinfo(cam_pinfo *pinfo);
227
228 static __inline void cam_init_pinfo(cam_pinfo *pinfo)
229 {
230 pinfo->priority = CAM_PRIORITY_NONE;
231 pinfo->index = CAM_UNQUEUED_INDEX;
232 }
233 #endif
234
235 #endif /* _CAM_CAM_H */
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