1/*-
2 * Common functions for SCSI Interface Modules (SIMs).
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

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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
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: head/sys/cam/cam_sim.c 168752 2007-04-15 08:49:19Z scottl $");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/malloc.h>
35#include <sys/kernel.h>
36#include <sys/lock.h>
37#include <sys/mutex.h>
38
39#include <cam/cam.h>
40#include <cam/cam_ccb.h>
41#include <cam/cam_sim.h>
42#include <cam/cam_queue.h>
43
44#define CAM_PATH_ANY (u_int32_t)-1
45

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55cam_simq_free(struct cam_devq *devq)
56{
57 cam_devq_free(devq);
58}
59
60struct cam_sim *
61cam_sim_alloc(sim_action_func sim_action, sim_poll_func sim_poll,
62 const char *sim_name, void *softc, u_int32_t unit,
63 struct mtx *mtx, int max_dev_transactions,
64 int max_tagged_dev_transactions, struct cam_devq *queue)
65{
66 struct cam_sim *sim;
67
68 if (mtx == NULL)
69 return (NULL);
70
71 sim = (struct cam_sim *)malloc(sizeof(struct cam_sim),
72 M_CAMSIM, M_NOWAIT);
73
74 if (sim == NULL)
75 return (NULL);
76
77 sim->sim_action = sim_action;
78 sim->sim_poll = sim_poll;
79 sim->sim_name = sim_name;
80 sim->softc = softc;
81 sim->path_id = CAM_PATH_ANY;
82 sim->unit_number = unit;
83 sim->bus_id = 0; /* set in xpt_bus_register */
84 sim->max_tagged_dev_openings = max_tagged_dev_transactions;
85 sim->max_dev_openings = max_dev_transactions;
86 sim->flags = 0;
87 sim->devq = queue;
88 sim->mtx = mtx;
89 if (mtx == &Giant) {
90 sim->flags |= 0;
91 callout_init(&sim->callout, 0);
92 } else {
93 sim->flags |= CAM_SIM_MPSAFE;
94 callout_init(&sim->callout, 1);
95 }
96
97 SLIST_INIT(&sim->ccb_freeq);
98
99 return (sim);
100}
101
102void
103cam_sim_free(struct cam_sim *sim, int free_devq)
104{
105 if (free_devq)
106 cam_simq_free(sim->devq);
107 free(sim, M_CAMSIM);
108}
109
110void
111cam_sim_set_path(struct cam_sim *sim, u_int32_t path_id)
112{
113 sim->path_id = path_id;
114}