1 /*
2 * Copyright © 2023 Google, Inc.
3 * SPDX-License-Identifier: MIT
4 */
5
6 /* A simple helper layer for virtgpu drm native context, which also
7 * abstracted the differences between vtest (communicating via socket
8 * with vtest server) vs virtgpu (communicating via drm/virtio driver
9 * in the guest).
10 */
11
12 #ifndef __VDRM_H__
13 #define __VDRM_H__
14
15 #include <stdint.h>
16
17 #include "util/simple_mtx.h"
18
19 #define VIRGL_RENDERER_UNSTABLE_APIS 1
20 #include "virglrenderer_hw.h"
21
22 #ifdef __cplusplus
23 extern "C" {
24 #endif
25
26 struct vdrm_device;
27 struct vdrm_execbuf_params;
28
29 struct vdrm_device_funcs {
30 /* Note flush_locked and execbuf_locked are similar, and on top of virtgpu
31 * guest kernel driver are basically the same. But with vtest, only cmds
32 * that result in host kernel cmd submission can take and/or return fence
33 * and/or syncobj fd's.
34 */
35 int (*execbuf_locked)(struct vdrm_device *vdev, struct vdrm_execbuf_params *p,
36 void *command, unsigned size);
37 int (*flush_locked)(struct vdrm_device *vdev, uintptr_t *fencep);
38
39 void (*wait_fence)(struct vdrm_device *vdev, uintptr_t fence);
40
41 uint32_t (*dmabuf_to_handle)(struct vdrm_device *vdev, int fd);
42 uint32_t (*handle_to_res_id)(struct vdrm_device *vdev, uint32_t handle);
43
44 uint32_t (*bo_create)(struct vdrm_device *vdev, size_t size, uint32_t blob_flags,
45 uint64_t blob_id, struct vdrm_ccmd_req *req);
46 int (*bo_wait)(struct vdrm_device *vdev, uint32_t handle);
47 void *(*bo_map)(struct vdrm_device *vdev, uint32_t handle, size_t size);
48 int (*bo_export_dmabuf)(struct vdrm_device *vdev, uint32_t handle);
49 void (*bo_close)(struct vdrm_device *vdev, uint32_t handle);
50
51 void (*close)(struct vdrm_device *vdev);
52 };
53
54 struct vdrm_device {
55 const struct vdrm_device_funcs *funcs;
56
57 struct virgl_renderer_capset_drm caps;
58 struct vdrm_shmem *shmem;
59 uint8_t *rsp_mem;
60 uint32_t rsp_mem_len;
61 uint32_t next_rsp_off;
62 simple_mtx_t rsp_lock;
63 simple_mtx_t eb_lock;
64
65 uint32_t next_seqno;
66
67 /*
68 * Buffering for requests to host:
69 */
70 uint32_t reqbuf_len;
71 uint32_t reqbuf_cnt;
72 uint8_t reqbuf[0x4000];
73 };
74
75 struct vdrm_device *vdrm_device_connect(int fd, uint32_t context_type);
76 void vdrm_device_close(struct vdrm_device *vdev);
77
78 void * vdrm_alloc_rsp(struct vdrm_device *vdev, struct vdrm_ccmd_req *req, uint32_t sz);
79 int vdrm_send_req(struct vdrm_device *vdev, struct vdrm_ccmd_req *req, bool sync);
80 int vdrm_flush(struct vdrm_device *vdev);
81
82 struct vdrm_execbuf_params {
83 int ring_idx;
84
85 struct vdrm_ccmd_req *req; /* Note, must be host kernel cmd submit */
86
87 uint32_t *handles;
88 uint32_t num_handles;
89
90 struct drm_virtgpu_execbuffer_syncobj *in_syncobjs;
91 struct drm_virtgpu_execbuffer_syncobj *out_syncobjs;
92
93 bool has_in_fence_fd : 1;
94 bool needs_out_fence_fd : 1;
95
96 int fence_fd; /* in/out fence */
97
98 uint32_t num_in_syncobjs;
99 uint32_t num_out_syncobjs;
100 };
101
102 /**
103 * Note, must be a host cmd submission, which specified in/out fence/syncobj
104 * can be passed to. In the vtest case, we can't get fences/syncobjs for
105 * other host cmds.
106 */
107 int vdrm_execbuf(struct vdrm_device *vdev, struct vdrm_execbuf_params *p);
108
109 void vdrm_host_sync(struct vdrm_device *vdev, const struct vdrm_ccmd_req *req);
110
111 /**
112 * Import dmabuf fd returning a GEM handle
113 */
114 static inline uint32_t
vdrm_dmabuf_to_handle(struct vdrm_device * vdev,int fd)115 vdrm_dmabuf_to_handle(struct vdrm_device *vdev, int fd)
116 {
117 return vdev->funcs->dmabuf_to_handle(vdev, fd);
118 }
119
120 static inline uint32_t
vdrm_handle_to_res_id(struct vdrm_device * vdev,uint32_t handle)121 vdrm_handle_to_res_id(struct vdrm_device *vdev, uint32_t handle)
122 {
123 return vdev->funcs->handle_to_res_id(vdev, handle);
124 }
125
126 uint32_t vdrm_bo_create(struct vdrm_device *vdev, size_t size,
127 uint32_t blob_flags, uint64_t blob_id,
128 struct vdrm_ccmd_req *req);
129
130 static inline int
vdrm_bo_wait(struct vdrm_device * vdev,uint32_t handle)131 vdrm_bo_wait(struct vdrm_device *vdev, uint32_t handle)
132 {
133 return vdev->funcs->bo_wait(vdev, handle);
134 }
135
136 static inline void *
vdrm_bo_map(struct vdrm_device * vdev,uint32_t handle,size_t size)137 vdrm_bo_map(struct vdrm_device *vdev, uint32_t handle, size_t size)
138 {
139 return vdev->funcs->bo_map(vdev, handle, size);
140 }
141
142 static inline int
vdrm_bo_export_dmabuf(struct vdrm_device * vdev,uint32_t handle)143 vdrm_bo_export_dmabuf(struct vdrm_device *vdev, uint32_t handle)
144 {
145 return vdev->funcs->bo_export_dmabuf(vdev, handle);
146 }
147
148 static inline void
vdrm_bo_close(struct vdrm_device * vdev,uint32_t handle)149 vdrm_bo_close(struct vdrm_device *vdev, uint32_t handle)
150 {
151 vdev->funcs->bo_close(vdev, handle);
152 }
153
154 #ifdef __cplusplus
155 } /* end of extern "C" */
156 #endif
157
158 #endif /* __VDRM_H__ */
159