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