1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * Greybus Host Device |
4 | * |
5 | * Copyright 2014-2015 Google Inc. |
6 | * Copyright 2014-2015 Linaro Ltd. |
7 | */ |
8 | |
9 | #ifndef __HD_H |
10 | #define __HD_H |
11 | |
12 | #include <linux/types.h> |
13 | #include <linux/device.h> |
14 | |
15 | struct gb_host_device; |
16 | struct gb_message; |
17 | |
18 | struct gb_hd_driver { |
19 | size_t hd_priv_size; |
20 | |
21 | int (*cport_allocate)(struct gb_host_device *hd, int cport_id, |
22 | unsigned long flags); |
23 | void (*cport_release)(struct gb_host_device *hd, u16 cport_id); |
24 | int (*cport_enable)(struct gb_host_device *hd, u16 cport_id, |
25 | unsigned long flags); |
26 | int (*cport_disable)(struct gb_host_device *hd, u16 cport_id); |
27 | int (*cport_connected)(struct gb_host_device *hd, u16 cport_id); |
28 | int (*cport_flush)(struct gb_host_device *hd, u16 cport_id); |
29 | int (*cport_shutdown)(struct gb_host_device *hd, u16 cport_id, |
30 | u8 phase, unsigned int timeout); |
31 | int (*cport_quiesce)(struct gb_host_device *hd, u16 cport_id, |
32 | size_t peer_space, unsigned int timeout); |
33 | int (*cport_clear)(struct gb_host_device *hd, u16 cport_id); |
34 | |
35 | int (*message_send)(struct gb_host_device *hd, u16 dest_cport_id, |
36 | struct gb_message *message, gfp_t gfp_mask); |
37 | void (*message_cancel)(struct gb_message *message); |
38 | int (*latency_tag_enable)(struct gb_host_device *hd, u16 cport_id); |
39 | int (*latency_tag_disable)(struct gb_host_device *hd, u16 cport_id); |
40 | int (*output)(struct gb_host_device *hd, void *req, u16 size, u8 cmd, |
41 | bool async); |
42 | }; |
43 | |
44 | struct gb_host_device { |
45 | struct device dev; |
46 | int bus_id; |
47 | const struct gb_hd_driver *driver; |
48 | |
49 | struct list_head modules; |
50 | struct list_head connections; |
51 | struct ida cport_id_map; |
52 | |
53 | /* Number of CPorts supported by the UniPro IP */ |
54 | size_t num_cports; |
55 | |
56 | /* Host device buffer constraints */ |
57 | size_t buffer_size_max; |
58 | |
59 | struct gb_svc *svc; |
60 | /* Private data for the host driver */ |
61 | unsigned long hd_priv[] __aligned(sizeof(s64)); |
62 | }; |
63 | #define to_gb_host_device(d) container_of(d, struct gb_host_device, dev) |
64 | |
65 | int gb_hd_cport_reserve(struct gb_host_device *hd, u16 cport_id); |
66 | void gb_hd_cport_release_reserved(struct gb_host_device *hd, u16 cport_id); |
67 | int gb_hd_cport_allocate(struct gb_host_device *hd, int cport_id, |
68 | unsigned long flags); |
69 | void gb_hd_cport_release(struct gb_host_device *hd, u16 cport_id); |
70 | |
71 | struct gb_host_device *gb_hd_create(struct gb_hd_driver *driver, |
72 | struct device *parent, |
73 | size_t buffer_size_max, |
74 | size_t num_cports); |
75 | int gb_hd_add(struct gb_host_device *hd); |
76 | void gb_hd_del(struct gb_host_device *hd); |
77 | void gb_hd_shutdown(struct gb_host_device *hd); |
78 | void gb_hd_put(struct gb_host_device *hd); |
79 | int gb_hd_output(struct gb_host_device *hd, void *req, u16 size, u8 cmd, |
80 | bool in_irq); |
81 | |
82 | int gb_hd_init(void); |
83 | void gb_hd_exit(void); |
84 | |
85 | #endif /* __HD_H */ |
86 | |