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1 | /** @file\r |
2 | \r | |
3 | Internal type and macro definitions for the Virtio GPU hybrid driver.\r | |
4 | \r | |
5 | Copyright (C) 2016, Red Hat, Inc.\r | |
6 | \r | |
7 | This program and the accompanying materials are licensed and made available\r | |
8 | under the terms and conditions of the BSD License which accompanies this\r | |
9 | distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
13 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #ifndef _VIRTIO_GPU_DXE_H_\r | |
18 | #define _VIRTIO_GPU_DXE_H_\r | |
19 | \r | |
20 | #include <Library/DebugLib.h>\r | |
21 | #include <Library/UefiLib.h>\r | |
22 | #include <Protocol/VirtioDevice.h>\r | |
23 | \r | |
24 | //\r | |
25 | // Forward declaration of VGPU_GOP.\r | |
26 | //\r | |
27 | typedef struct VGPU_GOP_STRUCT VGPU_GOP;\r | |
28 | \r | |
29 | //\r | |
30 | // The abstraction that directly corresponds to a Virtio GPU device.\r | |
31 | //\r | |
32 | // This structure will be installed on the handle that has the VirtIo Device\r | |
33 | // Protocol interface, with GUID gEfiCallerIdGuid. A similar trick is employed\r | |
34 | // in TerminalDxe, and it is necessary so that we can look up VGPU_DEV just\r | |
35 | // from the VirtIo Device Protocol handle in the Component Name 2 Protocol\r | |
36 | // implementation.\r | |
37 | //\r | |
38 | typedef struct {\r | |
39 | //\r | |
40 | // VirtIo represents access to the Virtio GPU device. Never NULL.\r | |
41 | //\r | |
42 | VIRTIO_DEVICE_PROTOCOL *VirtIo;\r | |
43 | \r | |
44 | //\r | |
45 | // BusName carries a customized name for\r | |
46 | // EFI_COMPONENT_NAME2_PROTOCOL.GetControllerName(). It is expressed in table\r | |
47 | // form because it can theoretically support several languages. Never NULL.\r | |
48 | //\r | |
49 | EFI_UNICODE_STRING_TABLE *BusName;\r | |
50 | \r | |
c5f235bb LE |
51 | //\r |
52 | // VirtIo ring used for VirtIo communication.\r | |
53 | //\r | |
54 | VRING Ring;\r | |
55 | \r | |
56 | //\r | |
57 | // Event to be signaled at ExitBootServices().\r | |
58 | //\r | |
59 | EFI_EVENT ExitBoot;\r | |
60 | \r | |
a2a4fa66 LE |
61 | //\r |
62 | // The Child field references the GOP wrapper structure. If this pointer is\r | |
63 | // NULL, then the hybrid driver has bound (i.e., started) the\r | |
64 | // VIRTIO_DEVICE_PROTOCOL controller without producing the child GOP\r | |
65 | // controller (that is, after Start() was called with RemainingDevicePath\r | |
66 | // pointing to and End of Device Path node). Child can be created and\r | |
67 | // destroyed, even repeatedly, independently of VGPU_DEV.\r | |
68 | //\r | |
69 | // In practice, this field represents the single head (scanout) that we\r | |
70 | // support.\r | |
71 | //\r | |
72 | VGPU_GOP *Child;\r | |
73 | } VGPU_DEV;\r | |
74 | \r | |
75 | //\r | |
76 | // The Graphics Output Protocol wrapper structure.\r | |
77 | //\r | |
78 | #define VGPU_GOP_SIG SIGNATURE_64 ('V', 'G', 'P', 'U', '_', 'G', 'O', 'P')\r | |
79 | \r | |
80 | struct VGPU_GOP_STRUCT {\r | |
81 | UINT64 Signature;\r | |
82 | \r | |
83 | //\r | |
84 | // ParentBus points to the parent VGPU_DEV object. Never NULL.\r | |
85 | //\r | |
86 | VGPU_DEV *ParentBus;\r | |
87 | \r | |
88 | //\r | |
89 | // GopName carries a customized name for\r | |
90 | // EFI_COMPONENT_NAME2_PROTOCOL.GetControllerName(). It is expressed in table\r | |
91 | // form because it can theoretically support several languages. Never NULL.\r | |
92 | //\r | |
93 | EFI_UNICODE_STRING_TABLE *GopName;\r | |
94 | \r | |
95 | //\r | |
96 | // GopHandle is the UEFI child handle that carries the device path ending\r | |
97 | // with the ACPI ADR node, and the Graphics Output Protocol. Never NULL.\r | |
98 | //\r | |
99 | EFI_HANDLE GopHandle;\r | |
100 | \r | |
101 | //\r | |
102 | // The GopDevicePath field is the device path installed on GopHandle,\r | |
103 | // ending with an ACPI ADR node. Never NULL.\r | |
104 | //\r | |
105 | EFI_DEVICE_PATH_PROTOCOL *GopDevicePath;\r | |
106 | \r | |
107 | //\r | |
108 | // The Gop field is installed on the child handle as Graphics Output Protocol\r | |
109 | // interface.\r | |
110 | //\r | |
111 | // For now it is just a placeholder.\r | |
112 | //\r | |
113 | UINT8 Gop;\r | |
114 | };\r | |
115 | \r | |
c5f235bb LE |
116 | //\r |
117 | // VirtIo GPU initialization, and commands (primitives) for the GPU device.\r | |
118 | //\r | |
119 | /**\r | |
120 | Configure the VirtIo GPU device that underlies VgpuDev.\r | |
121 | \r | |
122 | @param[in,out] VgpuDev The VGPU_DEV object to set up VirtIo messaging for.\r | |
123 | On input, the caller is responsible for having\r | |
124 | initialized VgpuDev->VirtIo. On output, VgpuDev->Ring\r | |
125 | has been initialized, and synchronous VirtIo GPU\r | |
126 | commands (primitives) can be submitted to the device.\r | |
127 | \r | |
128 | @retval EFI_SUCCESS VirtIo GPU configuration successful.\r | |
129 | \r | |
130 | @retval EFI_UNSUPPORTED The host-side configuration of the VirtIo GPU is not\r | |
131 | supported by this driver.\r | |
132 | \r | |
133 | @retval Error codes from underlying functions.\r | |
134 | **/\r | |
135 | EFI_STATUS\r | |
136 | VirtioGpuInit (\r | |
137 | IN OUT VGPU_DEV *VgpuDev\r | |
138 | );\r | |
139 | \r | |
140 | /**\r | |
141 | De-configure the VirtIo GPU device that underlies VgpuDev.\r | |
142 | \r | |
143 | @param[in,out] VgpuDev The VGPU_DEV object to tear down VirtIo messaging\r | |
144 | for. On input, the caller is responsible for having\r | |
145 | called VirtioGpuInit(). On output, VgpuDev->Ring has\r | |
146 | been uninitialized; VirtIo GPU commands (primitives)\r | |
147 | can no longer be submitted to the device.\r | |
148 | **/\r | |
149 | VOID\r | |
150 | VirtioGpuUninit (\r | |
151 | IN OUT VGPU_DEV *VgpuDev\r | |
152 | );\r | |
153 | \r | |
154 | /**\r | |
155 | EFI_EVENT_NOTIFY function for the VGPU_DEV.ExitBoot event. It resets the\r | |
156 | VirtIo device, causing it to release its resources and to forget its\r | |
157 | configuration.\r | |
158 | \r | |
159 | This function may only be called (that is, VGPU_DEV.ExitBoot may only be\r | |
160 | signaled) after VirtioGpuInit() returns and before VirtioGpuUninit() is\r | |
161 | called.\r | |
162 | \r | |
163 | @param[in] Event Event whose notification function is being invoked.\r | |
164 | \r | |
165 | @param[in] Context Pointer to the associated VGPU_DEV object.\r | |
166 | **/\r | |
167 | VOID\r | |
168 | EFIAPI\r | |
169 | VirtioGpuExitBoot (\r | |
170 | IN EFI_EVENT Event,\r | |
171 | IN VOID *Context\r | |
172 | );\r | |
173 | \r | |
a2a4fa66 | 174 | #endif // _VIRTIO_GPU_DXE_H_\r |