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11 #ifndef __XEN_SND_FRONT_EVTCHNL_H
12 #define __XEN_SND_FRONT_EVTCHNL_H
13
14 #include <xen/interface/io/sndif.h>
15
16 struct xen_snd_front_info;
17
18 #ifndef GRANT_INVALID_REF
19
20
21
22
23
24 #define GRANT_INVALID_REF 0
25 #endif
26
27
28 #define VSND_WAIT_BACK_MS 3000
29
30 enum xen_snd_front_evtchnl_state {
31 EVTCHNL_STATE_DISCONNECTED,
32 EVTCHNL_STATE_CONNECTED,
33 };
34
35 enum xen_snd_front_evtchnl_type {
36 EVTCHNL_TYPE_REQ,
37 EVTCHNL_TYPE_EVT,
38 };
39
40 struct xen_snd_front_evtchnl {
41 struct xen_snd_front_info *front_info;
42 int gref;
43 int port;
44 int irq;
45 int index;
46
47 enum xen_snd_front_evtchnl_state state;
48 enum xen_snd_front_evtchnl_type type;
49
50 u16 evt_id;
51
52 u16 evt_next_id;
53
54 struct mutex ring_io_lock;
55 union {
56 struct {
57 struct xen_sndif_front_ring ring;
58 struct completion completion;
59
60 struct mutex req_io_lock;
61
62
63 int resp_status;
64 union {
65 struct xensnd_query_hw_param hw_param;
66 } resp;
67 } req;
68 struct {
69 struct xensnd_event_page *page;
70
71 struct snd_pcm_substream *substream;
72 } evt;
73 } u;
74 };
75
76 struct xen_snd_front_evtchnl_pair {
77 struct xen_snd_front_evtchnl req;
78 struct xen_snd_front_evtchnl evt;
79 };
80
81 int xen_snd_front_evtchnl_create_all(struct xen_snd_front_info *front_info,
82 int num_streams);
83
84 void xen_snd_front_evtchnl_free_all(struct xen_snd_front_info *front_info);
85
86 int xen_snd_front_evtchnl_publish_all(struct xen_snd_front_info *front_info);
87
88 void xen_snd_front_evtchnl_flush(struct xen_snd_front_evtchnl *evtchnl);
89
90 void xen_snd_front_evtchnl_pair_set_connected(struct xen_snd_front_evtchnl_pair *evt_pair,
91 bool is_connected);
92
93 void xen_snd_front_evtchnl_pair_clear(struct xen_snd_front_evtchnl_pair *evt_pair);
94
95 #endif