usr/src/cmd/mdb/common/modules/usba/usba.c

   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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2000-2002 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  * Routines extracted from usr/src/uts/common/io/usb/usba/usba.c.
  31  */
  32
  33 #include <sys/mdb_modapi.h>
  34 #include <sys/usb/usba.h>
  35 #include <sys/usb/usba/usba_types.h>
  36 #include <sys/usb/usba/usba_impl.h>
  37 #include <sys/usb/usba/hcdi_impl.h>
  38 #include <sys/file.h>
  39 #include <sys/sunndi.h>
  40
  41
  42 /*
  43  * check whether this dip is the root hub.
  44  * dip_addr is address of the devinfo struct in the core image (not local space)
  45  */
  46 static int
  47 mdb_usba_is_root_hub(struct dev_info *dip)
  48 {
  49         uintptr_t       p = (uintptr_t)dip->devi_hw_prop_ptr;
  50
  51         while (p != NULL) {
  52                 ddi_prop_t prop;
  53                 char prop_name[128];
  54
  55                 if (mdb_vread(&prop, sizeof (prop), p) == -1) {
  56                         mdb_warn("failed to read property");
  57                         break;
  58                 }
  59                 if (mdb_readstr(prop_name, sizeof (prop_name),
  60                     (uintptr_t)prop.prop_name) == -1) {
  61                         mdb_warn("failed to read property name");
  62                 }
  63
  64                 if (strcmp(prop_name, "root-hub") == 0) {
  65
  66                         return (1);
  67                 }
  68
  69                 p = (uintptr_t)prop.prop_next;
  70         }
  71
  72         return (0);
  73 }
  74
  75
  76 /*
  77  * retrieve hcdi structure from the dip
  78  *
  79  * dip_addr is address of the devinfo struct in the core image (not local space)
  80  */
  81 uintptr_t
  82 mdb_usba_hcdi_get_hcdi(struct dev_info *dip)
  83 {
  84         return ((uintptr_t)dip->devi_driver_data);
  85 }
  86
  87
  88 /*
  89  * get usba_device pointer in the devi
  90  *
  91  * dip_addr is address of the devinfo struct in the core image (not local space)
  92  */
  93 uintptr_t
  94 mdb_usba_get_usba_device(uintptr_t dip_addr)
  95 {
  96         struct dev_info devinfo;
  97
  98         if (mdb_vread(&devinfo, sizeof (struct dev_info), dip_addr) == -1) {
  99                 mdb_warn("failed to read dev_info at %p", dip_addr);
 100
 101                 return (NULL);
 102         }
 103
 104         /*
 105          * we cannot use parent_data in the usb node because its
 106          * bus parent (eg. PCI nexus driver) uses this data
 107          *
 108          * we cannot use driver data in the other usb nodes since
 109          * usb drivers may need to use this
 110          */
 111         if (mdb_usba_is_root_hub(&devinfo)) {
 112                 usba_hcdi_t hcdi_struct;
 113                 uintptr_t hcdi_addr = mdb_usba_hcdi_get_hcdi(&devinfo);
 114
 115                 if (!hcdi_addr) {
 116
 117                         return (NULL);
 118                 }
 119
 120                 /* Read hcdi struct into local address space. */
 121                 if (mdb_vread(&hcdi_struct, sizeof (usba_hcdi_t),
 122                     hcdi_addr) == -1) {
 123                         mdb_warn("failed to read hcdi struct");
 124
 125                         return (NULL);
 126                 }
 127
 128                 return ((uintptr_t)hcdi_struct.hcdi_usba_device);
 129
 130         } else {
 131                 struct dev_info devinfo;
 132
 133                 if (mdb_vread(&devinfo, sizeof (struct dev_info),
 134                     dip_addr) == -1) {
 135                         mdb_warn("failed to read dev_info at %p", dip_addr);
 136
 137                         return (NULL);
 138                 }
 139
 140                 /* casts needed to keep lint happy */
 141                 return ((uintptr_t)devinfo.devi_parent_data);
 142         }
 143 }