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3e79bfd6 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
8b881c07 BA |
2 | /* |
3 | * remote processor messaging bus internals | |
4 | * | |
5 | * Copyright (C) 2011 Texas Instruments, Inc. | |
6 | * Copyright (C) 2011 Google, Inc. | |
7 | * | |
8 | * Ohad Ben-Cohen <ohad@wizery.com> | |
9 | * Brian Swetland <swetland@google.com> | |
8b881c07 BA |
10 | */ |
11 | ||
12 | #ifndef __RPMSG_INTERNAL_H__ | |
13 | #define __RPMSG_INTERNAL_H__ | |
14 | ||
15 | #include <linux/rpmsg.h> | |
84d58132 | 16 | #include <linux/poll.h> |
8b881c07 BA |
17 | |
18 | #define to_rpmsg_device(d) container_of(d, struct rpmsg_device, dev) | |
19 | #define to_rpmsg_driver(d) container_of(d, struct rpmsg_driver, drv) | |
20 | ||
fade037e BA |
21 | /** |
22 | * struct rpmsg_device_ops - indirection table for the rpmsg_device operations | |
9753e12c AP |
23 | * @create_channel: create backend-specific channel, optional |
24 | * @release_channel: release backend-specific channel, optional | |
9ff166de | 25 | * @create_ept: create backend-specific endpoint, required |
fade037e BA |
26 | * @announce_create: announce presence of new channel, optional |
27 | * @announce_destroy: announce destruction of channel, optional | |
28 | * | |
29 | * Indirection table for the operations that a rpmsg backend should implement. | |
30 | * @announce_create and @announce_destroy are optional as the backend might | |
31 | * advertise new channels implicitly by creating the endpoints. | |
32 | */ | |
33 | struct rpmsg_device_ops { | |
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34 | struct rpmsg_device *(*create_channel)(struct rpmsg_device *rpdev, |
35 | struct rpmsg_channel_info *chinfo); | |
36 | int (*release_channel)(struct rpmsg_device *rpdev, | |
37 | struct rpmsg_channel_info *chinfo); | |
fade037e BA |
38 | struct rpmsg_endpoint *(*create_ept)(struct rpmsg_device *rpdev, |
39 | rpmsg_rx_cb_t cb, void *priv, | |
40 | struct rpmsg_channel_info chinfo); | |
41 | ||
42 | int (*announce_create)(struct rpmsg_device *ept); | |
43 | int (*announce_destroy)(struct rpmsg_device *ept); | |
44 | }; | |
45 | ||
46 | /** | |
47 | * struct rpmsg_endpoint_ops - indirection table for rpmsg_endpoint operations | |
9ff166de | 48 | * @destroy_ept: see @rpmsg_destroy_ept(), required |
fade037e BA |
49 | * @send: see @rpmsg_send(), required |
50 | * @sendto: see @rpmsg_sendto(), optional | |
51 | * @send_offchannel: see @rpmsg_send_offchannel(), optional | |
52 | * @trysend: see @rpmsg_trysend(), required | |
53 | * @trysendto: see @rpmsg_trysendto(), optional | |
54 | * @trysend_offchannel: see @rpmsg_trysend_offchannel(), optional | |
9ff166de | 55 | * @poll: see @rpmsg_poll(), optional |
fade037e BA |
56 | * |
57 | * Indirection table for the operations that a rpmsg backend should implement. | |
58 | * In addition to @destroy_ept, the backend must at least implement @send and | |
59 | * @trysend, while the variants sending data off-channel are optional. | |
60 | */ | |
61 | struct rpmsg_endpoint_ops { | |
62 | void (*destroy_ept)(struct rpmsg_endpoint *ept); | |
63 | ||
64 | int (*send)(struct rpmsg_endpoint *ept, void *data, int len); | |
65 | int (*sendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst); | |
66 | int (*send_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst, | |
67 | void *data, int len); | |
68 | ||
69 | int (*trysend)(struct rpmsg_endpoint *ept, void *data, int len); | |
70 | int (*trysendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst); | |
71 | int (*trysend_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst, | |
72 | void *data, int len); | |
afc9a42b | 73 | __poll_t (*poll)(struct rpmsg_endpoint *ept, struct file *filp, |
84d58132 | 74 | poll_table *wait); |
fade037e BA |
75 | }; |
76 | ||
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77 | struct device *rpmsg_find_device(struct device *parent, |
78 | struct rpmsg_channel_info *chinfo); | |
79 | ||
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80 | struct rpmsg_device *rpmsg_create_channel(struct rpmsg_device *rpdev, |
81 | struct rpmsg_channel_info *chinfo); | |
82 | int rpmsg_release_channel(struct rpmsg_device *rpdev, | |
83 | struct rpmsg_channel_info *chinfo); | |
c0cdc19f BA |
84 | /** |
85 | * rpmsg_chrdev_register_device() - register chrdev device based on rpdev | |
86 | * @rpdev: prepared rpdev to be used for creating endpoints | |
87 | * | |
88 | * This function wraps rpmsg_register_device() preparing the rpdev for use as | |
89 | * basis for the rpmsg chrdev. | |
90 | */ | |
91 | static inline int rpmsg_chrdev_register_device(struct rpmsg_device *rpdev) | |
92 | { | |
93 | strcpy(rpdev->id.name, "rpmsg_chrdev"); | |
94 | rpdev->driver_override = "rpmsg_chrdev"; | |
95 | ||
96 | return rpmsg_register_device(rpdev); | |
97 | } | |
98 | ||
8b881c07 | 99 | #endif |