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4f2494cf GP |
1 | /** @file\r |
2 | \r | |
462f95ec | 3 | Copyright (c) 2017-2021, Arm Limited. All rights reserved.<BR>\r |
4f2494cf | 4 | \r |
4059386c | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
4f2494cf | 6 | \r |
375f2d8e NM |
7 | @par Specification Reference:\r |
8 | - Arm System Control and Management Interface - Platform Design Document\r | |
9 | (https://developer.arm.com/documentation/den0056/)\r | |
4f2494cf GP |
10 | **/\r |
11 | \r | |
12 | #include <Base.h>\r | |
13 | #include <Library/DebugLib.h>\r | |
14 | #include <Library/MemoryAllocationLib.h>\r | |
15 | #include <Library/UefiBootServicesTableLib.h>\r | |
16 | #include <Protocol/ArmScmiBaseProtocol.h>\r | |
17 | #include <Protocol/ArmScmiClockProtocol.h>\r | |
18 | #include <Protocol/ArmScmiPerformanceProtocol.h>\r | |
19 | \r | |
20 | #include "ArmScmiBaseProtocolPrivate.h"\r | |
21 | #include "ArmScmiClockProtocolPrivate.h"\r | |
22 | #include "ArmScmiPerformanceProtocolPrivate.h"\r | |
23 | #include "ScmiDxe.h"\r | |
24 | #include "ScmiPrivate.h"\r | |
25 | \r | |
429309e0 MK |
26 | STATIC CONST SCMI_PROTOCOL_ENTRY Protocols[] = {\r |
27 | { ScmiProtocolIdBase, ScmiBaseProtocolInit },\r | |
462f95ec | 28 | { ScmiProtocolIdPerformance, ScmiPerformanceProtocolInit },\r |
429309e0 | 29 | { ScmiProtocolIdClock, ScmiClockProtocolInit }\r |
4f2494cf GP |
30 | };\r |
31 | \r | |
32 | /** ARM SCMI driver entry point function.\r | |
33 | \r | |
34 | This function installs the SCMI Base protocol and a list of other\r | |
35 | protocols is queried using the Base protocol. If protocol is supported,\r | |
36 | driver will call each protocol init function to install the protocol on\r | |
37 | the ImageHandle.\r | |
38 | \r | |
39 | @param[in] ImageHandle Handle to this EFI Image which will be used to\r | |
40 | install Base, Clock and Performance protocols.\r | |
41 | @param[in] SystemTable A pointer to boot time system table.\r | |
42 | \r | |
43 | @retval EFI_SUCCESS Driver initalized successfully.\r | |
44 | @retval EFI_UNSUPPORTED If SCMI base protocol version is not supported.\r | |
45 | @retval !(EFI_SUCCESS) Other errors.\r | |
46 | **/\r | |
47 | EFI_STATUS\r | |
48 | EFIAPI\r | |
49 | ArmScmiDxeEntryPoint (\r | |
429309e0 MK |
50 | IN EFI_HANDLE ImageHandle,\r |
51 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
4f2494cf GP |
52 | )\r |
53 | {\r | |
54 | EFI_STATUS Status;\r | |
55 | SCMI_BASE_PROTOCOL *BaseProtocol;\r | |
56 | UINT32 Version;\r | |
57 | UINT32 Index;\r | |
58 | UINT32 NumProtocols;\r | |
889cf68c | 59 | UINT32 ProtocolIndex;\r |
3b03b5e9 GP |
60 | UINT8 *SupportedList;\r |
61 | UINT32 SupportedListSize;\r | |
4f2494cf | 62 | \r |
4f2494cf | 63 | // Every SCMI implementation must implement the base protocol.\r |
462f95ec | 64 | ASSERT (Protocols[0].Id == ScmiProtocolIdBase);\r |
889cf68c GP |
65 | \r |
66 | Status = ScmiBaseProtocolInit (&ImageHandle);\r | |
4f2494cf GP |
67 | if (EFI_ERROR (Status)) {\r |
68 | ASSERT (FALSE);\r | |
69 | return Status;\r | |
70 | }\r | |
71 | \r | |
72 | Status = gBS->LocateProtocol (\r | |
73 | &gArmScmiBaseProtocolGuid,\r | |
74 | NULL,\r | |
429309e0 | 75 | (VOID **)&BaseProtocol\r |
4f2494cf GP |
76 | );\r |
77 | if (EFI_ERROR (Status)) {\r | |
78 | ASSERT (FALSE);\r | |
79 | return Status;\r | |
80 | }\r | |
81 | \r | |
82 | // Get SCMI Base protocol version.\r | |
83 | Status = BaseProtocol->GetVersion (BaseProtocol, &Version);\r | |
84 | if (EFI_ERROR (Status)) {\r | |
85 | ASSERT (FALSE);\r | |
86 | return Status;\r | |
87 | }\r | |
88 | \r | |
375f2d8e NM |
89 | // Accept any version between SCMI v1.0 and SCMI v2.0\r |
90 | if ((Version < BASE_PROTOCOL_VERSION_V1) ||\r | |
429309e0 MK |
91 | (Version > BASE_PROTOCOL_VERSION_V2))\r |
92 | {\r | |
4f2494cf GP |
93 | ASSERT (FALSE);\r |
94 | return EFI_UNSUPPORTED;\r | |
95 | }\r | |
96 | \r | |
97 | // Apart from Base protocol, SCMI may implement various other protocols,\r | |
98 | // query total protocols implemented by the SCP firmware.\r | |
99 | NumProtocols = 0;\r | |
429309e0 | 100 | Status = BaseProtocol->GetTotalProtocols (BaseProtocol, &NumProtocols);\r |
4f2494cf GP |
101 | if (EFI_ERROR (Status)) {\r |
102 | ASSERT (FALSE);\r | |
103 | return Status;\r | |
104 | }\r | |
105 | \r | |
106 | ASSERT (NumProtocols != 0);\r | |
107 | \r | |
3b03b5e9 GP |
108 | SupportedListSize = (NumProtocols * sizeof (*SupportedList));\r |
109 | \r | |
110 | Status = gBS->AllocatePool (\r | |
111 | EfiBootServicesData,\r | |
112 | SupportedListSize,\r | |
429309e0 | 113 | (VOID **)&SupportedList\r |
3b03b5e9 GP |
114 | );\r |
115 | if (EFI_ERROR (Status)) {\r | |
116 | ASSERT (FALSE);\r | |
117 | return Status;\r | |
118 | }\r | |
119 | \r | |
4f2494cf GP |
120 | // Get the list of protocols supported by SCP firmware on the platform.\r |
121 | Status = BaseProtocol->DiscoverListProtocols (\r | |
3b03b5e9 GP |
122 | BaseProtocol,\r |
123 | &SupportedListSize,\r | |
124 | SupportedList\r | |
125 | );\r | |
4f2494cf | 126 | if (EFI_ERROR (Status)) {\r |
3b03b5e9 | 127 | gBS->FreePool (SupportedList);\r |
4f2494cf GP |
128 | ASSERT (FALSE);\r |
129 | return Status;\r | |
130 | }\r | |
131 | \r | |
132 | // Install supported protocol on ImageHandle.\r | |
889cf68c | 133 | for (ProtocolIndex = 1; ProtocolIndex < ARRAY_SIZE (Protocols);\r |
429309e0 MK |
134 | ProtocolIndex++)\r |
135 | {\r | |
889cf68c GP |
136 | for (Index = 0; Index < NumProtocols; Index++) {\r |
137 | if (Protocols[ProtocolIndex].Id == SupportedList[Index]) {\r | |
138 | Status = Protocols[ProtocolIndex].InitFn (&ImageHandle);\r | |
139 | if (EFI_ERROR (Status)) {\r | |
140 | ASSERT_EFI_ERROR (Status);\r | |
141 | return Status;\r | |
142 | }\r | |
429309e0 | 143 | \r |
889cf68c | 144 | break;\r |
4f2494cf GP |
145 | }\r |
146 | }\r | |
147 | }\r | |
148 | \r | |
3b03b5e9 GP |
149 | gBS->FreePool (SupportedList);\r |
150 | \r | |
4f2494cf GP |
151 | return EFI_SUCCESS;\r |
152 | }\r |