1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright 2009 Scott Long
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 * $FreeBSD$
29 */
30
31 #ifndef _CAM_CAM_XPT_INTERNAL_H
32 #define _CAM_CAM_XPT_INTERNAL_H 1
33
34 #include <sys/taskqueue.h>
35
36 /* Forward Declarations */
37 struct cam_eb;
38 struct cam_et;
39 struct cam_ed;
40
41 typedef struct cam_ed * (*xpt_alloc_device_func)(struct cam_eb *bus,
42 struct cam_et *target,
43 lun_id_t lun_id);
44 typedef void (*xpt_release_device_func)(struct cam_ed *device);
45 typedef void (*xpt_action_func)(union ccb *start_ccb);
46 typedef void (*xpt_dev_async_func)(u_int32_t async_code,
47 struct cam_eb *bus,
48 struct cam_et *target,
49 struct cam_ed *device,
50 void *async_arg);
51 typedef void (*xpt_announce_periph_func)(struct cam_periph *periph);
52 typedef void (*xpt_announce_periph_sbuf_func)(struct cam_periph *periph, struct sbuf *sbuf);
53
54 struct xpt_xport_ops {
55 xpt_alloc_device_func alloc_device;
56 xpt_release_device_func reldev;
57 xpt_action_func action;
58 xpt_dev_async_func async;
59 xpt_announce_periph_func announce;
60 xpt_announce_periph_sbuf_func announce_sbuf;
61 };
62
63 struct xpt_xport {
64 cam_xport xport;
65 const char *name;
66 struct xpt_xport_ops *ops;
67 };
68
69 SET_DECLARE(cam_xpt_xport_set, struct xpt_xport);
70 #define CAM_XPT_XPORT(data) \
71 DATA_SET(cam_xpt_xport_set, data)
72
73 typedef void (*xpt_proto_announce_func)(struct cam_ed *);
74 typedef void (*xpt_proto_announce_sbuf_func)(struct cam_ed *, struct sbuf *);
75 typedef void (*xpt_proto_debug_out_func)(union ccb *);
76
77 struct xpt_proto_ops {
78 xpt_proto_announce_func announce;
79 xpt_proto_announce_sbuf_func announce_sbuf;
80 xpt_proto_announce_func denounce;
81 xpt_proto_announce_sbuf_func denounce_sbuf;
82 xpt_proto_debug_out_func debug_out;
83 };
84
85 struct xpt_proto {
86 cam_proto proto;
87 const char *name;
88 struct xpt_proto_ops *ops;
89 };
90
91 SET_DECLARE(cam_xpt_proto_set, struct xpt_proto);
92 #define CAM_XPT_PROTO(data) \
93 DATA_SET(cam_xpt_proto_set, data)
94
95 /*
96 * The CAM EDT (Existing Device Table) contains the device information for
97 * all devices for all buses in the system. The table contains a
98 * cam_ed structure for each device on the bus.
99 */
100 struct cam_ed {
101 cam_pinfo devq_entry;
102 TAILQ_ENTRY(cam_ed) links;
103 struct cam_et *target;
104 struct cam_sim *sim;
105 lun_id_t lun_id;
106 struct cam_ccbq ccbq; /* Queue of pending ccbs */
107 struct async_list asyncs; /* Async callback info for this B/T/L */
108 struct periph_list periphs; /* All attached devices */
109 u_int generation; /* Generation number */
110 void *quirk; /* Oddities about this device */
111 u_int maxtags;
112 u_int mintags;
113 cam_proto protocol;
114 u_int protocol_version;
115 cam_xport transport;
116 u_int transport_version;
117 struct scsi_inquiry_data inq_data;
118 uint8_t *supported_vpds;
119 uint8_t supported_vpds_len;
120 uint32_t device_id_len;
121 uint8_t *device_id;
122 uint32_t ext_inq_len;
123 uint8_t *ext_inq;
124 uint8_t physpath_len;
125 uint8_t *physpath; /* physical path string form */
126 uint32_t rcap_len;
127 uint8_t *rcap_buf;
128 struct ata_params ident_data;
129 struct mmc_params mmc_ident_data;
130 u_int8_t inq_flags; /*
131 * Current settings for inquiry flags.
132 * This allows us to override settings
133 * like disconnection and tagged
134 * queuing for a device.
135 */
136 u_int8_t queue_flags; /* Queue flags from the control page */
137 u_int8_t serial_num_len;
138 u_int8_t *serial_num;
139 u_int32_t flags;
140 #define CAM_DEV_UNCONFIGURED 0x01
141 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02
142 #define CAM_DEV_REL_ON_COMPLETE 0x04
143 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08
144 #define CAM_DEV_TAG_AFTER_COUNT 0x20
145 #define CAM_DEV_INQUIRY_DATA_VALID 0x40
146 #define CAM_DEV_IN_DV 0x80
147 #define CAM_DEV_DV_HIT_BOTTOM 0x100
148 #define CAM_DEV_IDENTIFY_DATA_VALID 0x200
149 u_int32_t tag_delay_count;
150 #define CAM_TAG_DELAY_COUNT 5
151 u_int32_t tag_saved_openings;
152 u_int32_t refcount;
153 struct callout callout;
154 STAILQ_ENTRY(cam_ed) highpowerq_entry;
155 struct mtx device_mtx;
156 struct task device_destroy_task;
157 struct nvme_controller_data *nvme_cdata;
158 struct nvme_namespace_data *nvme_data;
159 };
160
161 /*
162 * Each target is represented by an ET (Existing Target). These
163 * entries are created when a target is successfully probed with an
164 * identify, and removed when a device fails to respond after a number
165 * of retries, or a bus rescan finds the device missing.
166 */
167 struct cam_et {
168 TAILQ_HEAD(, cam_ed) ed_entries;
169 TAILQ_ENTRY(cam_et) links;
170 struct cam_eb *bus;
171 target_id_t target_id;
172 u_int32_t refcount;
173 u_int generation;
174 struct timeval last_reset;
175 u_int rpl_size;
176 struct scsi_report_luns_data *luns;
177 struct mtx luns_mtx; /* Protection for luns field. */
178 };
179
180 /*
181 * Each bus is represented by an EB (Existing Bus). These entries
182 * are created by calls to xpt_bus_register and deleted by calls to
183 * xpt_bus_deregister.
184 */
185 struct cam_eb {
186 TAILQ_HEAD(, cam_et) et_entries;
187 TAILQ_ENTRY(cam_eb) links;
188 path_id_t path_id;
189 struct cam_sim *sim;
190 struct timeval last_reset;
191 u_int32_t flags;
192 #define CAM_EB_RUNQ_SCHEDULED 0x01
193 u_int32_t refcount;
194 u_int generation;
195 device_t parent_dev;
196 struct xpt_xport *xport;
197 struct mtx eb_mtx; /* Bus topology mutex. */
198 };
199
200 struct cam_path {
201 struct cam_periph *periph;
202 struct cam_eb *bus;
203 struct cam_et *target;
204 struct cam_ed *device;
205 };
206
207 struct cam_ed * xpt_alloc_device(struct cam_eb *bus,
208 struct cam_et *target,
209 lun_id_t lun_id);
210 void xpt_acquire_device(struct cam_ed *device);
211 void xpt_release_device(struct cam_ed *device);
212 u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
213 void xpt_start_tags(struct cam_path *path);
214 void xpt_stop_tags(struct cam_path *path);
215
216 MALLOC_DECLARE(M_CAMXPT);
217
218 #endif
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