chan.h

 1/* SPDX-License-Identifier: MIT
 2 *
 3 * Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
 4 */
 5#ifndef __NVIF_CHAN_H__
 6#define __NVIF_CHAN_H__
 7#include "push.h"
 8
 9struct nvif_chan {
10	const struct nvif_chan_func {
11		struct {
12			u32 (*read_get)(struct nvif_chan *);
13		} push;
14
15		struct {
16			u32 (*read_get)(struct nvif_chan *);
17			void (*push)(struct nvif_chan *, bool main, u64 addr, u32 size,
18				     bool no_prefetch);
19			void (*kick)(struct nvif_chan *);
20			int (*post)(struct nvif_chan *, u32 gpptr, u32 pbptr);
21			u32 post_size;
22		} gpfifo;
23
24		struct {
25			int (*release)(struct nvif_chan *, u64 addr, u32 data);
26		} sem;
27	} *func;
28
29	struct {
30		struct nvif_map map;
31	} userd;
32
33	struct {
34		struct nvif_map map;
35		u32 cur;
36		u32 max;
37		int free;
38	} gpfifo;
39
40	struct {
41		struct nvif_map map;
42		u64 addr;
43	} sema;
44
45	struct nvif_push push;
46
47	struct nvif_user *usermode;
48	u32 doorbell_token;
49};
50
51int nvif_chan_dma_wait(struct nvif_chan *, u32 push_nr);
52
53void nvif_chan_gpfifo_ctor(const struct nvif_chan_func *, void *userd, void *gpfifo, u32 gpfifo_size,
54			   void *push, u64 push_addr, u32 push_size, struct nvif_chan *);
55int nvif_chan_gpfifo_wait(struct nvif_chan *, u32 gpfifo_nr, u32 push_nr);
56void nvif_chan_gpfifo_push(struct nvif_chan *, u64 addr, u32 size, bool no_prefetch);
57int nvif_chan_gpfifo_post(struct nvif_chan *);
58
59void nvif_chan506f_gpfifo_push(struct nvif_chan *, bool main, u64 addr, u32 size, bool no_prefetch);
60void nvif_chan506f_gpfifo_kick(struct nvif_chan *);
61
62int nvif_chan906f_ctor_(const struct nvif_chan_func *, void *userd, void *gpfifo, u32 gpfifo_size,
63			void *push, u64 push_addr, u32 push_size, void *sema, u64 sema_addr,
64			struct nvif_chan *);
65u32 nvif_chan906f_read_get(struct nvif_chan *);
66u32 nvif_chan906f_gpfifo_read_get(struct nvif_chan *);
67int nvif_chan906f_gpfifo_post(struct nvif_chan *, u32 gpptr, u32 pbptr);
68
69int nvif_chan506f_ctor(struct nvif_chan *, void *userd, void *gpfifo, u32 gpfifo_size,
70		       void *push, u64 push_addr, u32 push_size);
71int nvif_chan906f_ctor(struct nvif_chan *, void *userd, void *gpfifo, u32 gpfifo_size,
72		       void *push, u64 push_addr, u32 push_size, void *sema, u64 sema_addr);
73int nvif_chanc36f_ctor(struct nvif_chan *, void *userd, void *gpfifo, u32 gpfifo_size,
74		       void *push, u64 push_addr, u32 push_size, void *sema, u64 sema_addr,
75		       struct nvif_user *usermode, u32 doorbell_token);
76#endif