1*1ae08745Sheppo /*
2*1ae08745Sheppo * CDDL HEADER START
3*1ae08745Sheppo *
4*1ae08745Sheppo * The contents of this file are subject to the terms of the
5*1ae08745Sheppo * Common Development and Distribution License (the "License").
6*1ae08745Sheppo * You may not use this file except in compliance with the License.
7*1ae08745Sheppo *
8*1ae08745Sheppo * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9*1ae08745Sheppo * or http://www.opensolaris.org/os/licensing.
10*1ae08745Sheppo * See the License for the specific language governing permissions
11*1ae08745Sheppo * and limitations under the License.
12*1ae08745Sheppo *
13*1ae08745Sheppo * When distributing Covered Code, include this CDDL HEADER in each
14*1ae08745Sheppo * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15*1ae08745Sheppo * If applicable, add the following below this CDDL HEADER, with the
16*1ae08745Sheppo * fields enclosed by brackets "[]" replaced with your own identifying
17*1ae08745Sheppo * information: Portions Copyright [yyyy] [name of copyright owner]
18*1ae08745Sheppo *
19*1ae08745Sheppo * CDDL HEADER END
20*1ae08745Sheppo */
21*1ae08745Sheppo
22*1ae08745Sheppo /*
23*1ae08745Sheppo * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
24*1ae08745Sheppo * Use is subject to license terms.
25*1ae08745Sheppo */
26*1ae08745Sheppo
27*1ae08745Sheppo #pragma ident "%Z%%M% %I% %E% SMI"
28*1ae08745Sheppo
29*1ae08745Sheppo /*
30*1ae08745Sheppo * This module provides debugging tools for the LDoms vDisk drivers
31*1ae08745Sheppo * (vds and vdc).
32*1ae08745Sheppo */
33*1ae08745Sheppo
34*1ae08745Sheppo #include <sys/mdb_modapi.h>
35*1ae08745Sheppo
36*1ae08745Sheppo #include <sys/vdsk_common.h>
37*1ae08745Sheppo
38*1ae08745Sheppo /*
39*1ae08745Sheppo */
40*1ae08745Sheppo int
vd_dring_entry_walk_init(mdb_walk_state_t * wsp)41*1ae08745Sheppo vd_dring_entry_walk_init(mdb_walk_state_t *wsp)
42*1ae08745Sheppo {
43*1ae08745Sheppo /* Must have a start addr. */
44*1ae08745Sheppo if (wsp->walk_addr == NULL) {
45*1ae08745Sheppo mdb_warn("Descriptor Ring base address required\n");
46*1ae08745Sheppo
47*1ae08745Sheppo return (WALK_ERR);
48*1ae08745Sheppo }
49*1ae08745Sheppo
50*1ae08745Sheppo return (WALK_NEXT);
51*1ae08745Sheppo }
52*1ae08745Sheppo
53*1ae08745Sheppo
54*1ae08745Sheppo /*
55*1ae08745Sheppo * Generic entry walker step routine.
56*1ae08745Sheppo */
57*1ae08745Sheppo int
vd_dring_entry_walk_step(mdb_walk_state_t * wsp)58*1ae08745Sheppo vd_dring_entry_walk_step(mdb_walk_state_t *wsp)
59*1ae08745Sheppo {
60*1ae08745Sheppo static int entry_count = 0;
61*1ae08745Sheppo int status;
62*1ae08745Sheppo vd_dring_entry_t dring_entry;
63*1ae08745Sheppo
64*1ae08745Sheppo if (mdb_vread(&dring_entry, VD_DRING_ENTRY_SZ,
65*1ae08745Sheppo (uintptr_t)wsp->walk_addr) == -1) {
66*1ae08745Sheppo mdb_warn("failed to read vd_dring_entry_t at %p",
67*1ae08745Sheppo wsp->walk_addr);
68*1ae08745Sheppo
69*1ae08745Sheppo return (WALK_ERR);
70*1ae08745Sheppo }
71*1ae08745Sheppo
72*1ae08745Sheppo status = wsp->walk_callback(wsp->walk_addr, &dring_entry,
73*1ae08745Sheppo wsp->walk_cbdata);
74*1ae08745Sheppo wsp->walk_addr = (uintptr_t)(wsp->walk_addr + VD_DRING_ENTRY_SZ);
75*1ae08745Sheppo
76*1ae08745Sheppo /* Check if we're at the last element */
77*1ae08745Sheppo if (++entry_count >= VD_DRING_LEN) {
78*1ae08745Sheppo /* reset counter for next call to this walker */
79*1ae08745Sheppo entry_count = 0;
80*1ae08745Sheppo
81*1ae08745Sheppo return (WALK_DONE);
82*1ae08745Sheppo }
83*1ae08745Sheppo
84*1ae08745Sheppo return (status);
85*1ae08745Sheppo }
86*1ae08745Sheppo
87*1ae08745Sheppo /*
88*1ae08745Sheppo * MDB module linkage information:
89*1ae08745Sheppo */
90*1ae08745Sheppo
91*1ae08745Sheppo static const mdb_walker_t walkers[] = {
92*1ae08745Sheppo { "vd_dring_entry", "walk vDisk public Descriptor Ring entries",
93*1ae08745Sheppo vd_dring_entry_walk_init, vd_dring_entry_walk_step, NULL, NULL },
94*1ae08745Sheppo { NULL }
95*1ae08745Sheppo };
96*1ae08745Sheppo
97*1ae08745Sheppo static const mdb_modinfo_t modinfo = {
98*1ae08745Sheppo MDB_API_VERSION, NULL, walkers
99*1ae08745Sheppo };
100*1ae08745Sheppo
101*1ae08745Sheppo const mdb_modinfo_t *
_mdb_init(void)102*1ae08745Sheppo _mdb_init(void)
103*1ae08745Sheppo {
104*1ae08745Sheppo return (&modinfo);
105*1ae08745Sheppo }
106