2 * Data structures and definitions for SCSI Interface Modules (SIMs).
4 * SPDX-License-Identifier: BSD-2-Clause
6 * Copyright (c) 1997 Justin T. Gibbs.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions, and the following disclaimer,
14 * without modification, immediately at the beginning of the file.
15 * 2. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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31 #ifndef _CAM_CAM_SIM_H
32 #define _CAM_CAM_SIM_H 1
37 * The sim driver creates a sim for each controller. The sim device
38 * queue is separately created in order to allow resource sharing between
39 * sims. For instance, a driver may create one sim for each channel of
40 * a multi-channel controller and use the same queue for each channel.
41 * In this way, the queue resources are shared across all the channels
42 * of the multi-channel controller.
48 typedef void (*sim_action_func)(struct cam_sim *sim, union ccb *ccb);
49 typedef void (*sim_poll_func)(struct cam_sim *sim);
51 struct cam_devq * cam_simq_alloc(uint32_t max_sim_transactions);
52 void cam_simq_free(struct cam_devq *devq);
54 struct cam_sim * cam_sim_alloc(sim_action_func sim_action,
55 sim_poll_func sim_poll,
60 int max_dev_transactions,
61 int max_tagged_dev_transactions,
62 struct cam_devq *queue);
63 void cam_sim_free(struct cam_sim *sim, int free_devq);
64 void cam_sim_hold(struct cam_sim *sim);
65 void cam_sim_release(struct cam_sim *sim);
67 /* Optional sim attributes may be set with these. */
68 void cam_sim_set_path(struct cam_sim *sim, uint32_t path_id);
70 /* Generically useful offsets into the sim private area */
71 #define spriv_ptr0 sim_priv.entries[0].ptr
72 #define spriv_ptr1 sim_priv.entries[1].ptr
73 #define spriv_field0 sim_priv.entries[0].field
74 #define spriv_field1 sim_priv.entries[1].field
77 * The sim driver should not access anything directly from this
81 sim_action_func sim_action;
82 sim_poll_func sim_poll;
86 TAILQ_ENTRY(cam_sim) links;
87 uint32_t path_id;/* The Boot device may set this to 0? */
90 int max_tagged_dev_openings;
93 struct cam_devq *devq; /* Device Queue to use for this SIM */
94 int refcount; /* References to the SIM. */
97 static __inline uint32_t
98 cam_sim_path(const struct cam_sim *sim)
100 return (sim->path_id);
103 static __inline const char *
104 cam_sim_name(const struct cam_sim *sim)
106 return (sim->sim_name);
109 static __inline void *
110 cam_sim_softc(const struct cam_sim *sim)
115 static __inline uint32_t
116 cam_sim_unit(const struct cam_sim *sim)
118 return (sim->unit_number);
121 static __inline uint32_t
122 cam_sim_bus(const struct cam_sim *sim)
124 return (sim->bus_id);
128 cam_sim_pollable(const struct cam_sim *sim)
130 return (sim->sim_poll != NULL);
134 #endif /* _CAM_CAM_SIM_H */