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1/* SPDX-License-Identifier: MIT */
2/*
3 * Copyright © 2024 Tomeu Vizoso
4 */
5#ifndef __DRM_UAPI_ROCKET_ACCEL_H__
6#define __DRM_UAPI_ROCKET_ACCEL_H__
7
8#include "drm.h"
9
10#if defined(__cplusplus)
11extern "C" {
12#endif
13
14#define DRM_ROCKET_CREATE_BO 0x00
15#define DRM_ROCKET_SUBMIT 0x01
16#define DRM_ROCKET_PREP_BO 0x02
17#define DRM_ROCKET_FINI_BO 0x03
18
19#define DRM_IOCTL_ROCKET_CREATE_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_ROCKET_CREATE_BO, struct drm_rocket_create_bo)
20#define DRM_IOCTL_ROCKET_SUBMIT DRM_IOW(DRM_COMMAND_BASE + DRM_ROCKET_SUBMIT, struct drm_rocket_submit)
21#define DRM_IOCTL_ROCKET_PREP_BO DRM_IOW(DRM_COMMAND_BASE + DRM_ROCKET_PREP_BO, struct drm_rocket_prep_bo)
22#define DRM_IOCTL_ROCKET_FINI_BO DRM_IOW(DRM_COMMAND_BASE + DRM_ROCKET_FINI_BO, struct drm_rocket_fini_bo)
23
24/**
25 * struct drm_rocket_create_bo - ioctl argument for creating Rocket BOs.
26 *
27 */
28struct drm_rocket_create_bo {
29 /**
30 * @size: Input: Size of the requested BO.
31 */
32 __u32 size;
33
34 /**
35 * @handle: Output: GEM handle for the BO.
36 */
37 __u32 handle;
38
39 /**
40 * @dma_address: Output: DMA address for the BO in the NPU address
41 * space. This address is private to the DRM fd and is valid for
42 * the lifetime of the GEM handle.
43 */
44 __u64 dma_address;
45
46 /**
47 * @offset: Output: Offset into the drm node to use for subsequent
48 * mmap call.
49 */
50 __u64 offset;
51};
52
53/**
54 * struct drm_rocket_prep_bo - ioctl argument for starting CPU ownership of the BO.
55 *
56 * Takes care of waiting for any NPU jobs that might still use the NPU and performs cache
57 * synchronization.
58 */
59struct drm_rocket_prep_bo {
60 /**
61 * @handle: Input: GEM handle of the buffer object.
62 */
63 __u32 handle;
64
65 /**
66 * @reserved: Reserved, must be zero.
67 */
68 __u32 reserved;
69
70 /**
71 * @timeout_ns: Input: Amount of time to wait for NPU jobs.
72 */
73 __s64 timeout_ns;
74};
75
76/**
77 * struct drm_rocket_fini_bo - ioctl argument for finishing CPU ownership of the BO.
78 *
79 * Synchronize caches for NPU access.
80 */
81struct drm_rocket_fini_bo {
82 /**
83 * @handle: Input: GEM handle of the buffer object.
84 */
85 __u32 handle;
86
87 /**
88 * @reserved: Reserved, must be zero.
89 */
90 __u32 reserved;
91};
92
93/**
94 * struct drm_rocket_task - A task to be run on the NPU
95 *
96 * A task is the smallest unit of work that can be run on the NPU.
97 */
98struct drm_rocket_task {
99 /**
100 * @regcmd: Input: DMA address to NPU mapping of register command buffer
101 */
102 __u32 regcmd;
103
104 /**
105 * @regcmd_count: Input: Number of commands in the register command
106 * buffer
107 */
108 __u32 regcmd_count;
109};
110
111/**
112 * struct drm_rocket_job - A job to be run on the NPU
113 *
114 * The kernel will schedule the execution of this job taking into account its
115 * dependencies with other jobs. All tasks in the same job will be executed
116 * sequentially on the same core, to benefit from memory residency in SRAM.
117 */
118struct drm_rocket_job {
119 /**
120 * @tasks: Input: Pointer to an array of struct drm_rocket_task.
121 */
122 __u64 tasks;
123
124 /**
125 * @in_bo_handles: Input: Pointer to a u32 array of the BOs that
126 * are read by the job.
127 */
128 __u64 in_bo_handles;
129
130 /**
131 * @out_bo_handles: Input: Pointer to a u32 array of the BOs that
132 * are written to by the job.
133 */
134 __u64 out_bo_handles;
135
136 /**
137 * @task_count: Input: Number of tasks passed in.
138 */
139 __u32 task_count;
140
141 /**
142 * @task_struct_size: Input: Size in bytes of the structs in the
143 * @tasks field.
144 */
145 __u32 task_struct_size;
146
147 /**
148 * @in_bo_handle_count: Input: Number of input BO handles passed in
149 * (size is that times 4).
150 */
151 __u32 in_bo_handle_count;
152
153 /**
154 * @out_bo_handle_count: Input: Number of output BO handles passed in
155 * (size is that times 4).
156 */
157 __u32 out_bo_handle_count;
158};
159
160/**
161 * struct drm_rocket_submit - ioctl argument for submitting commands to the NPU.
162 *
163 * The kernel will schedule the execution of these jobs in dependency order.
164 */
165struct drm_rocket_submit {
166 /**
167 * @jobs: Input: Pointer to an array of struct drm_rocket_job.
168 */
169 __u64 jobs;
170
171 /**
172 * @job_count: Input: Number of jobs passed in.
173 */
174 __u32 job_count;
175
176 /**
177 * @job_struct_size: Input: Size in bytes of the structs in the
178 * @jobs field.
179 */
180 __u32 job_struct_size;
181
182 /**
183 * @reserved: Reserved, must be zero.
184 */
185 __u64 reserved;
186};
187
188#if defined(__cplusplus)
189}
190#endif
191
192#endif /* __DRM_UAPI_ROCKET_ACCEL_H__ */