1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
4  */
5 
6 #ifndef __IRIS_BUFFER_H__
7 #define __IRIS_BUFFER_H__
8 
9 #include <media/videobuf2-v4l2.h>
10 
11 struct iris_inst;
12 
13 #define to_iris_buffer(ptr)	container_of(ptr, struct iris_buffer, vb2)
14 
15 /**
16  * enum iris_buffer_type
17  *
18  * @BUF_INPUT: input buffer to the iris hardware
19  * @BUF_OUTPUT: output buffer from the iris hardware
20  * @BUF_BIN: buffer to store intermediate bin data
21  * @BUF_ARP: buffer for auto register programming
22  * @BUF_COMV: buffer to store colocated motion vectors
23  * @BUF_NON_COMV: buffer to hold config data for HW
24  * @BUF_LINE: buffer to store decoding/encoding context data for HW
25  * @BUF_DPB: buffer to store display picture buffers for reference
26  * @BUF_PERSIST: buffer to store session context data
27  * @BUF_SCRATCH_1: buffer to store decoding/encoding context data for HW
28  * @BUF_TYPE_MAX: max buffer types
29  */
30 enum iris_buffer_type {
31 	BUF_INPUT = 1,
32 	BUF_OUTPUT,
33 	BUF_BIN,
34 	BUF_ARP,
35 	BUF_COMV,
36 	BUF_NON_COMV,
37 	BUF_LINE,
38 	BUF_DPB,
39 	BUF_PERSIST,
40 	BUF_SCRATCH_1,
41 	BUF_TYPE_MAX,
42 };
43 
44 /*
45  * enum iris_buffer_attributes
46  *
47  * BUF_ATTR_DEFERRED: buffer queued by client but not submitted to firmware.
48  * BUF_ATTR_PENDING_RELEASE: buffers requested to be released from firmware.
49  * BUF_ATTR_QUEUED: buffers submitted to firmware.
50  * BUF_ATTR_DEQUEUED: buffers received from firmware.
51  * BUF_ATTR_BUFFER_DONE: buffers sent back to vb2.
52  */
53 enum iris_buffer_attributes {
54 	BUF_ATTR_DEFERRED		= BIT(0),
55 	BUF_ATTR_PENDING_RELEASE	= BIT(1),
56 	BUF_ATTR_QUEUED			= BIT(2),
57 	BUF_ATTR_DEQUEUED		= BIT(3),
58 	BUF_ATTR_BUFFER_DONE		= BIT(4),
59 };
60 
61 /**
62  * struct iris_buffer
63  *
64  * @vb2: v4l2 vb2 buffer
65  * @list: list head for the iris_buffers structure
66  * @inst: iris instance structure
67  * @type: enum for type of iris buffer
68  * @index: identifier for the iris buffer
69  * @fd: file descriptor of the buffer
70  * @buffer_size: accessible buffer size in bytes starting from addr_offset
71  * @data_offset: accessible buffer offset from base address
72  * @data_size: data size in bytes
73  * @device_addr: device address of the buffer
74  * @kvaddr: kernel virtual address of the buffer
75  * @dma_attrs: dma attributes
76  * @flags: buffer flags. It is represented as bit masks.
77  * @timestamp: timestamp of the buffer in nano seconds (ns)
78  * @attr: enum for iris buffer attributes
79  */
80 struct iris_buffer {
81 	struct vb2_v4l2_buffer		vb2;
82 	struct list_head		list;
83 	struct iris_inst		*inst;
84 	enum iris_buffer_type		type;
85 	u32				index;
86 	int				fd;
87 	size_t				buffer_size;
88 	u32				data_offset;
89 	size_t				data_size;
90 	dma_addr_t			device_addr;
91 	void				*kvaddr;
92 	unsigned long			dma_attrs;
93 	u32				flags; /* V4L2_BUF_FLAG_* */
94 	u64				timestamp;
95 	enum iris_buffer_attributes	attr;
96 };
97 
98 struct iris_buffers {
99 	struct list_head	list;
100 	u32			min_count;
101 	u32			size;
102 };
103 
104 int iris_get_buffer_size(struct iris_inst *inst, enum iris_buffer_type buffer_type);
105 void iris_get_internal_buffers(struct iris_inst *inst, u32 plane);
106 int iris_create_internal_buffers(struct iris_inst *inst, u32 plane);
107 int iris_queue_internal_buffers(struct iris_inst *inst, u32 plane);
108 int iris_destroy_internal_buffer(struct iris_inst *inst, struct iris_buffer *buffer);
109 int iris_destroy_internal_buffers(struct iris_inst *inst, u32 plane);
110 int iris_alloc_and_queue_persist_bufs(struct iris_inst *inst);
111 int iris_alloc_and_queue_input_int_bufs(struct iris_inst *inst);
112 int iris_queue_buffer(struct iris_inst *inst, struct iris_buffer *buf);
113 int iris_queue_deferred_buffers(struct iris_inst *inst, enum iris_buffer_type buf_type);
114 int iris_vb2_buffer_done(struct iris_inst *inst, struct iris_buffer *buf);
115 void iris_vb2_queue_error(struct iris_inst *inst);
116 
117 #endif
118