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 /*
  28  * Routines extracted from usr/src/uts/common/io/usb/usba/usba.c.
  29  */
  30
  31 #include <sys/mdb_modapi.h>
  32 #include <sys/usb/usba.h>
  33 #include <sys/usb/usba/usba_types.h>
  34 #include <sys/usb/usba/usba_impl.h>
  35 #include <sys/usb/usba/hcdi_impl.h>
  36 #include <sys/file.h>
  37 #include <sys/sunndi.h>
  38
  39
  40 /*
  41  * check whether this dip is the root hub.
  42  * dip_addr is address of the devinfo struct in the core image (not local space)
  43  */
  44 static int
  45 mdb_usba_is_root_hub(struct dev_info *dip)
  46 {
  47         uintptr_t       p = (uintptr_t)dip->devi_hw_prop_ptr;
  48
  49         while (p != (uintptr_t)NULL) {
  50                 ddi_prop_t prop;
  51                 char prop_name[128];
  52
  53                 if (mdb_vread(&prop, sizeof (prop), p) == -1) {
  54                         mdb_warn("failed to read property");
  55                         break;
  56                 }
  57                 if (mdb_readstr(prop_name, sizeof (prop_name),
  58                     (uintptr_t)prop.prop_name) == -1) {
  59                         mdb_warn("failed to read property name");
  60                 }
  61
  62                 if (strcmp(prop_name, "root-hub") == 0) {
  63
  64                         return (1);
  65                 }
  66
  67                 p = (uintptr_t)prop.prop_next;
  68         }
  69
  70         return (0);
  71 }
  72
  73
  74 /*
  75  * retrieve hcdi structure from the dip
  76  *
  77  * dip_addr is address of the devinfo struct in the core image (not local space)
  78  */
  79 uintptr_t
  80 mdb_usba_hcdi_get_hcdi(struct dev_info *dip)
  81 {
  82         return ((uintptr_t)dip->devi_driver_data);
  83 }
  84
  85
  86 /*
  87  * get usba_device pointer in the devi
  88  *
  89  * dip_addr is address of the devinfo struct in the core image (not local space)
  90  */
  91 uintptr_t
  92 mdb_usba_get_usba_device(uintptr_t dip_addr)
  93 {
  94         struct dev_info devinfo;
  95
  96         if (mdb_vread(&devinfo, sizeof (struct dev_info), dip_addr) == -1) {
  97                 mdb_warn("failed to read dev_info at %p", dip_addr);
  98
  99                 return ((uintptr_t)NULL);
 100         }
 101
 102         /*
 103          * we cannot use parent_data in the usb node because its
 104          * bus parent (eg. PCI nexus driver) uses this data
 105          *
 106          * we cannot use driver data in the other usb nodes since
 107          * usb drivers may need to use this
 108          */
 109         if (mdb_usba_is_root_hub(&devinfo)) {
 110                 usba_hcdi_t hcdi_struct;
 111                 uintptr_t hcdi_addr = mdb_usba_hcdi_get_hcdi(&devinfo);
 112
 113                 if (!hcdi_addr) {
 114
 115                         return ((uintptr_t)NULL);
 116                 }
 117
 118                 /* Read hcdi struct into local address space. */
 119                 if (mdb_vread(&hcdi_struct, sizeof (usba_hcdi_t),
 120                     hcdi_addr) == -1) {
 121                         mdb_warn("failed to read hcdi struct");
 122
 123                         return ((uintptr_t)NULL);
 124                 }
 125
 126                 return ((uintptr_t)hcdi_struct.hcdi_usba_device);
 127
 128         } else {
 129                 struct dev_info devinfo;
 130
 131                 if (mdb_vread(&devinfo, sizeof (struct dev_info),
 132                     dip_addr) == -1) {
 133                         mdb_warn("failed to read dev_info at %p", dip_addr);
 134
 135                         return ((uintptr_t)NULL);
 136                 }
 137
 138                 /* casts needed to keep lint happy */
 139                 return ((uintptr_t)devinfo.devi_parent_data);
 140         }
 141 }