1 /* 2 * Copyright (c) 2014 - 2015, The Linux Foundation. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above 10 * copyright notice, this list of conditions and the following 11 * disclaimer in the documentation and/or other materials provided 12 * with the distribution. 13 * * Neither the name of The Linux Foundation nor the names of its 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <utils/locker.h> 31 #include <utils/constants.h> 32 #include <utils/debug.h> 33 #include <core/buffer_sync_handler.h> 34 35 #include "core_impl.h" 36 37 #define __CLASS__ "CoreInterface" 38 39 #define GET_REVISION(version) (version >> 16) 40 #define GET_DATA_ALIGNMENT(version) ((version >> 8) & 0xFF) 41 #define GET_INSTRUCTION_SET(version) (version & 0xFF) 42 43 namespace sdm { 44 45 // Currently, we support only one client and one session for display core. So, create a global 46 // singleton core object. 47 struct CoreSingleton { 48 CoreSingleton() : core_impl(NULL) { } 49 50 CoreImpl *core_impl; 51 Locker locker; 52 } g_core; 53 54 // TODO(user): Have a single structure handle carries all the interface pointers. 55 DisplayError CoreInterface::CreateCore(DebugHandler *debug_handler, 56 BufferAllocator *buffer_allocator, 57 BufferSyncHandler *buffer_sync_handler, 58 CoreInterface **interface, uint32_t client_version) { 59 return CreateCore(debug_handler, buffer_allocator, buffer_sync_handler, NULL, 60 interface, client_version); 61 } 62 63 DisplayError CoreInterface::CreateCore(DebugHandler *debug_handler, 64 BufferAllocator *buffer_allocator, 65 BufferSyncHandler *buffer_sync_handler, 66 SocketHandler *socket_handler, 67 CoreInterface **interface, uint32_t client_version) { 68 SCOPE_LOCK(g_core.locker); 69 70 if (!debug_handler || !buffer_allocator || !buffer_sync_handler || !interface) { 71 return kErrorParameters; 72 } 73 74 // Check compatibility of client and core. 75 uint32_t lib_version = SDM_VERSION_TAG; 76 if (GET_REVISION(client_version) > GET_REVISION(lib_version)) { 77 return kErrorVersion; 78 } else if (GET_DATA_ALIGNMENT(client_version) != GET_DATA_ALIGNMENT(lib_version)) { 79 return kErrorDataAlignment; 80 } else if (GET_INSTRUCTION_SET(client_version) != GET_INSTRUCTION_SET(lib_version)) { 81 return kErrorInstructionSet; 82 } 83 84 CoreImpl *&core_impl = g_core.core_impl; 85 if (core_impl) { 86 return kErrorUndefined; 87 } 88 89 Debug::SetDebugHandler(debug_handler); 90 91 // Create appropriate CoreImpl object based on client version. 92 if (GET_REVISION(client_version) == CoreImpl::kRevision) { 93 core_impl = new CoreImpl(buffer_allocator, buffer_sync_handler, socket_handler); 94 } else { 95 return kErrorNotSupported; 96 } 97 98 if (!core_impl) { 99 return kErrorMemory; 100 } 101 102 DisplayError error = core_impl->Init(); 103 if (error != kErrorNone) { 104 delete core_impl; 105 core_impl = NULL; 106 return error; 107 } 108 109 *interface = core_impl; 110 DLOGI("Open interface handle = %p", *interface); 111 112 return kErrorNone; 113 } 114 115 DisplayError CoreInterface::DestroyCore() { 116 SCOPE_LOCK(g_core.locker); 117 118 DLOGI("Close handle"); 119 120 CoreImpl *&core_impl = g_core.core_impl; 121 if (!core_impl) { 122 return kErrorUndefined; 123 } 124 125 core_impl->Deinit(); 126 delete core_impl; 127 core_impl = NULL; 128 129 return kErrorNone; 130 } 131 132 } // namespace sdm 133 134