osfmk/atm/atm_internal.h

   1 /*
   2  * Copyright (c) 2012-2013 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _ATM_ATM_INTERNAL_H_
  30 #define _ATM_ATM_INTERNAL_H_
  31
  32 #include <stdint.h>
  33 #include <mach/mach_types.h>
  34 #include <atm/atm_types.h>
  35
  36 #ifdef  MACH_KERNEL_PRIVATE
  37
  38 #include <kern/thread.h>
  39 #include <kern/locks.h>
  40 #include <kern/queue.h>
  41 #include <ipc/ipc_voucher.h>
  42
  43 /* Flags for atm task descriptor */
  44 #define ATM_TASK_DEAD             0x1
  45
  46 /* Default value for Voucher Attribute Manager for ATM */
  47 #define VAM_DEFAULT_VALUE NULL
  48
  49 typedef mach_voucher_attr_value_handle_t atm_voucher_id_t;
  50
  51 struct atm_task_descriptor {
  52         decl_lck_mtx_data(,lock)             /* lock to protect reference count */
  53         mach_port_t     trace_buffer;            /* named memory entry registered by user */
  54         uint64_t        trace_buffer_size;   /* size of the trace_buffer registered */
  55         uint64_t        mailbox_array_size;      /* Mailbox array size in bytes. */
  56         void *          mailbox_kernel_addr; /* Kernel address where the mailbox is mapped. */
  57         uint32_t        reference_count:31,
  58                         flags:1;
  59 #if DEVELOPMENT || DEBUG
  60         task_t          task;           /* task pointer for debugging purposes */
  61         queue_chain_t   descriptor_elt; /* global chain of all descriptors */
  62 #endif
  63 };
  64
  65 typedef struct atm_task_descriptor *atm_task_descriptor_t;
  66 #define ATM_TASK_DESCRIPTOR_NULL NULL
  67
  68 struct atm_value {
  69         aid_t            aid;                   /* activity id */
  70         queue_head_t     listeners;             /* List of listeners who register for this activity */
  71         decl_lck_mtx_data( ,listener_lock)      /* Lock to protect listener list */
  72         queue_chain_t    vid_hash_elt;          /* Next hash element in the global hash table */
  73 #if DEVELOPMENT || DEBUG
  74         queue_chain_t    value_elt;             /* global chain of all values */
  75 #endif
  76         uint32_t         sync;                  /* Made ref count given to voucher sub system. */
  77         uint32_t         listener_count;        /* Number of Listerners listening on the value. */
  78         int32_t          reference_count;       /* use count on the atm value, 1 taken by the global hash table */
  79 };
  80
  81 typedef struct atm_value *atm_value_t;
  82 #define ATM_VALUE_NULL NULL
  83
  84 /* Flags for atm link objects */
  85 #define ATM_LINK_REMOVE             0x1
  86
  87 struct atm_link_object {
  88         atm_task_descriptor_t  descriptor;
  89         void *                 mailbox;              /* Offset in the mailbox registered by the user for an activity. */
  90         uint32_t                reference_count;     /* Refernece count for link object */
  91         uint8_t                flags;                /* Flags used mark for deletion from the listener list */
  92         queue_chain_t          listeners_element;    /* Head is atm_value->listeners. */
  93 };
  94
  95 typedef struct atm_link_object *atm_link_object_t;
  96
  97 #define atm_link_object_reference_internal(elem)        \
  98         (hw_atomic_add(&(elem)->reference_count, 1))
  99
 100 #define atm_link_object_release_internal(elem)  \
 101         (hw_atomic_sub(&(elem)->reference_count, 1))
 102
 103 struct atm_value_hash {
 104         queue_head_t    hash_list;
 105         decl_lck_mtx_data(, hash_list_lock)     /* lock to protect bucket list. */
 106 };
 107
 108 typedef struct atm_value_hash *atm_value_hash_t;
 109
 110 void atm_init(void);
 111 void atm_task_descriptor_destroy(atm_task_descriptor_t task_descriptor);
 112 kern_return_t atm_register_trace_memory(task_t  task, uint64_t trace_buffer_address, uint64_t buffer_size, uint64_t mailbox_array_size);
 113 kern_return_t atm_send_proc_inspect_notification(task_t task, int32_t traced_pid, uint64_t traced_uniqueid);
 114
 115 #endif /* MACH_KERNEL_PRIVATE */
 116
 117 #endif /* _ATM_ATM_INTERNAL_H_ */