FreeBSD/Linux Kernel Cross Reference
sys/cam/cam_sim.c
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
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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/5.3/sys/cam/cam_sim.c 116161 2003-06-10 17:50:20Z obrien $");
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/malloc.h>
35
36 #include <cam/cam.h>
37 #include <cam/cam_ccb.h>
38 #include <cam/cam_sim.h>
39 #include <cam/cam_queue.h>
40
41 #define CAM_PATH_ANY (u_int32_t)-1
42
43 struct cam_devq *
44 cam_simq_alloc(u_int32_t max_sim_transactions)
45 {
46 return (cam_devq_alloc(/*size*/0, max_sim_transactions));
47 }
48
49 void
50 cam_simq_free(struct cam_devq *devq)
51 {
52 cam_devq_free(devq);
53 }
54
55 struct cam_sim *
56 cam_sim_alloc(sim_action_func sim_action, sim_poll_func sim_poll,
57 const char *sim_name, void *softc, u_int32_t unit,
58 int max_dev_transactions,
59 int max_tagged_dev_transactions, struct cam_devq *queue)
60 {
61 struct cam_sim *sim;
62
63 /*
64 * If this is the xpt layer creating a sim, then it's OK
65 * to wait for an allocation.
66 *
67 * XXX Should we pass in a flag to indicate that wait is OK?
68 */
69 if (strcmp(sim_name, "xpt") == 0)
70 sim = (struct cam_sim *)malloc(sizeof(struct cam_sim),
71 M_DEVBUF, M_WAITOK);
72 else
73 sim = (struct cam_sim *)malloc(sizeof(struct cam_sim),
74 M_DEVBUF, M_NOWAIT);
75
76 if (sim != NULL) {
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 callout_handle_init(&sim->c_handle);
88 sim->devq = queue;
89 }
90
91 return (sim);
92 }
93
94 void
95 cam_sim_free(struct cam_sim *sim, int free_devq)
96 {
97 if (free_devq)
98 cam_simq_free(sim->devq);
99 free(sim, M_DEVBUF);
100 }
101
102 void
103 cam_sim_set_path(struct cam_sim *sim, u_int32_t path_id)
104 {
105 sim->path_id = path_id;
106 }
Cache object: 160849a0e4ab748dc713fea5dc52d8fe
|