1 /*-
2 * Copyright 2009 Scott Long
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions, and the following disclaimer,
10 * without modification, immediately at the beginning of the file.
11 * 2. The name of the author may not be used to endorse or promote products
12 * derived from this software without specific prior written permission.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
18 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/10.1/sys/cam/cam_xpt_internal.h 260387 2014-01-07 01:51:48Z scottl $
27 */
28
29 #ifndef _CAM_CAM_XPT_INTERNAL_H
30 #define _CAM_CAM_XPT_INTERNAL_H 1
31
32 #include <sys/taskqueue.h>
33
34 /* Forward Declarations */
35 struct cam_eb;
36 struct cam_et;
37 struct cam_ed;
38
39 typedef struct cam_ed * (*xpt_alloc_device_func)(struct cam_eb *bus,
40 struct cam_et *target,
41 lun_id_t lun_id);
42 typedef void (*xpt_release_device_func)(struct cam_ed *device);
43 typedef void (*xpt_action_func)(union ccb *start_ccb);
44 typedef void (*xpt_dev_async_func)(u_int32_t async_code,
45 struct cam_eb *bus,
46 struct cam_et *target,
47 struct cam_ed *device,
48 void *async_arg);
49 typedef void (*xpt_announce_periph_func)(struct cam_periph *periph);
50
51 struct xpt_xport {
52 xpt_alloc_device_func alloc_device;
53 xpt_release_device_func reldev;
54 xpt_action_func action;
55 xpt_dev_async_func async;
56 xpt_announce_periph_func announce;
57 };
58
59 /*
60 * The CAM EDT (Existing Device Table) contains the device information for
61 * all devices for all busses in the system. The table contains a
62 * cam_ed structure for each device on the bus.
63 */
64 struct cam_ed {
65 cam_pinfo devq_entry;
66 TAILQ_ENTRY(cam_ed) links;
67 struct cam_et *target;
68 struct cam_sim *sim;
69 lun_id_t lun_id;
70 struct cam_ccbq ccbq; /* Queue of pending ccbs */
71 struct async_list asyncs; /* Async callback info for this B/T/L */
72 struct periph_list periphs; /* All attached devices */
73 u_int generation; /* Generation number */
74 void *quirk; /* Oddities about this device */
75 u_int maxtags;
76 u_int mintags;
77 cam_proto protocol;
78 u_int protocol_version;
79 cam_xport transport;
80 u_int transport_version;
81 struct scsi_inquiry_data inq_data;
82 uint8_t *supported_vpds;
83 uint8_t supported_vpds_len;
84 uint32_t device_id_len;
85 uint8_t *device_id;
86 uint8_t physpath_len;
87 uint8_t *physpath; /* physical path string form */
88 uint32_t rcap_len;
89 uint8_t *rcap_buf;
90 struct ata_params ident_data;
91 u_int8_t inq_flags; /*
92 * Current settings for inquiry flags.
93 * This allows us to override settings
94 * like disconnection and tagged
95 * queuing for a device.
96 */
97 u_int8_t queue_flags; /* Queue flags from the control page */
98 u_int8_t serial_num_len;
99 u_int8_t *serial_num;
100 u_int32_t flags;
101 #define CAM_DEV_UNCONFIGURED 0x01
102 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02
103 #define CAM_DEV_REL_ON_COMPLETE 0x04
104 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08
105 #define CAM_DEV_TAG_AFTER_COUNT 0x20
106 #define CAM_DEV_INQUIRY_DATA_VALID 0x40
107 #define CAM_DEV_IN_DV 0x80
108 #define CAM_DEV_DV_HIT_BOTTOM 0x100
109 #define CAM_DEV_IDENTIFY_DATA_VALID 0x200
110 u_int32_t tag_delay_count;
111 #define CAM_TAG_DELAY_COUNT 5
112 u_int32_t tag_saved_openings;
113 u_int32_t refcount;
114 struct callout callout;
115 STAILQ_ENTRY(cam_ed) highpowerq_entry;
116 struct mtx device_mtx;
117 struct task device_destroy_task;
118 };
119
120 /*
121 * Each target is represented by an ET (Existing Target). These
122 * entries are created when a target is successfully probed with an
123 * identify, and removed when a device fails to respond after a number
124 * of retries, or a bus rescan finds the device missing.
125 */
126 struct cam_et {
127 TAILQ_HEAD(, cam_ed) ed_entries;
128 TAILQ_ENTRY(cam_et) links;
129 struct cam_eb *bus;
130 target_id_t target_id;
131 u_int32_t refcount;
132 u_int generation;
133 struct timeval last_reset;
134 u_int rpl_size;
135 struct scsi_report_luns_data *luns;
136 struct mtx luns_mtx; /* Protection for luns field. */
137 };
138
139 /*
140 * Each bus is represented by an EB (Existing Bus). These entries
141 * are created by calls to xpt_bus_register and deleted by calls to
142 * xpt_bus_deregister.
143 */
144 struct cam_eb {
145 TAILQ_HEAD(, cam_et) et_entries;
146 TAILQ_ENTRY(cam_eb) links;
147 path_id_t path_id;
148 struct cam_sim *sim;
149 struct timeval last_reset;
150 u_int32_t flags;
151 #define CAM_EB_RUNQ_SCHEDULED 0x01
152 u_int32_t refcount;
153 u_int generation;
154 device_t parent_dev;
155 struct xpt_xport *xport;
156 struct mtx eb_mtx; /* Bus topology mutex. */
157 };
158
159 struct cam_path {
160 struct cam_periph *periph;
161 struct cam_eb *bus;
162 struct cam_et *target;
163 struct cam_ed *device;
164 };
165
166 struct xpt_xport * scsi_get_xport(void);
167 struct xpt_xport * ata_get_xport(void);
168
169 struct cam_ed * xpt_alloc_device(struct cam_eb *bus,
170 struct cam_et *target,
171 lun_id_t lun_id);
172 void xpt_acquire_device(struct cam_ed *device);
173 void xpt_release_device(struct cam_ed *device);
174 u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
175 void xpt_start_tags(struct cam_path *path);
176 void xpt_stop_tags(struct cam_path *path);
177
178 MALLOC_DECLARE(M_CAMXPT);
179
180 #endif
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