2 * Data structures and definitions for SCSI Interface Modules (SIMs).
4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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
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33 #ifndef _CAM_CAM_SIM_H
34 #define _CAM_CAM_SIM_H 1
39 * The sim driver creates a sim for each controller. The sim device
40 * queue is separately created in order to allow resource sharing between
41 * sims. For instance, a driver may create one sim for each channel of
42 * a multi-channel controller and use the same queue for each channel.
43 * In this way, the queue resources are shared across all the channels
44 * of the multi-channel controller.
50 typedef void (*sim_action_func)(struct cam_sim *sim, union ccb *ccb);
51 typedef void (*sim_poll_func)(struct cam_sim *sim);
53 struct cam_devq * cam_simq_alloc(u_int32_t max_sim_transactions);
54 void cam_simq_free(struct cam_devq *devq);
56 struct cam_sim * cam_sim_alloc(sim_action_func sim_action,
57 sim_poll_func sim_poll,
62 int max_dev_transactions,
63 int max_tagged_dev_transactions,
64 struct cam_devq *queue);
65 void cam_sim_free(struct cam_sim *sim, int free_devq);
66 void cam_sim_hold(struct cam_sim *sim);
67 void cam_sim_release(struct cam_sim *sim);
69 /* Optional sim attributes may be set with these. */
70 void cam_sim_set_path(struct cam_sim *sim, u_int32_t path_id);
74 /* Convenience routines for accessing sim attributes. */
75 static __inline u_int32_t cam_sim_path(struct cam_sim *sim);
76 static __inline const char * cam_sim_name(struct cam_sim *sim);
77 static __inline void * cam_sim_softc(struct cam_sim *sim);
78 static __inline u_int32_t cam_sim_unit(struct cam_sim *sim);
79 static __inline u_int32_t cam_sim_bus(struct cam_sim *sim);
83 /* Generically useful offsets into the sim private area */
84 #define spriv_ptr0 sim_priv.entries[0].ptr
85 #define spriv_ptr1 sim_priv.entries[1].ptr
86 #define spriv_field0 sim_priv.entries[0].field
87 #define spriv_field1 sim_priv.entries[1].field
90 * The sim driver should not access anything directly from this
94 sim_action_func sim_action;
95 sim_poll_func sim_poll;
99 TAILQ_HEAD(, ccb_hdr) sim_doneq;
100 TAILQ_ENTRY(cam_sim) links;
101 u_int32_t path_id;/* The Boot device may set this to 0? */
102 u_int32_t unit_number;
104 int max_tagged_dev_openings;
105 int max_dev_openings;
107 #define CAM_SIM_REL_TIMEOUT_PENDING 0x01
108 #define CAM_SIM_MPSAFE 0x02
109 struct callout callout;
110 struct cam_devq *devq; /* Device Queue to use for this SIM */
111 int refcount; /* References to the SIM. */
114 #define CAM_SIM_LOCK(sim) mtx_lock((sim)->mtx)
115 #define CAM_SIM_UNLOCK(sim) mtx_unlock((sim)->mtx)
117 static __inline u_int32_t
118 cam_sim_path(struct cam_sim *sim)
120 return (sim->path_id);
123 static __inline const char *
124 cam_sim_name(struct cam_sim *sim)
126 return (sim->sim_name);
129 static __inline void *
130 cam_sim_softc(struct cam_sim *sim)
135 static __inline u_int32_t
136 cam_sim_unit(struct cam_sim *sim)
138 return (sim->unit_number);
141 static __inline u_int32_t
142 cam_sim_bus(struct cam_sim *sim)
144 return (sim->bus_id);
148 #endif /* _CAM_CAM_SIM_H */