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gerrit-public.fairphone.software / kernel / msm-5.4 / 133f09a169f3022be3de671b29658b7ecb375022 / . / include / asm-sparc64 / ldc.h
blob: 3c91f269f9dbeb9f4ee76c296322f0c34df72c29 [file] [log] [blame]
David S. Millere53e97c2007-07-09 22:22:44 -0700[diff] [blame]1#ifndef _SPARC64_LDC_H
2#define _SPARC64_LDC_H
3
4#include <asm/hypervisor.h>
5
6extern int ldom_domaining_enabled;
7
8/* The event handler will be evoked when link state changes
9 * or data becomes available on the receive side.
10 *
11 * For non-RAW links, if the LDC_EVENT_RESET event arrives the
12 * driver should reset all of it's internal state and reinvoke
13 * ldc_connect() to try and bring the link up again.
14 *
15 * For RAW links, ldc_connect() is not used. Instead the driver
16 * just waits for the LDC_EVENT_UP event.
17 */
18struct ldc_channel_config {
19 void (*event)(void *arg, int event);
20
21 u32 mtu;
22 unsigned int rx_irq;
23 unsigned int tx_irq;
24 u8 mode;
25#define LDC_MODE_RAW 0x00
26#define LDC_MODE_UNRELIABLE 0x01
27#define LDC_MODE_RESERVED 0x02
David S. Millercb481232007-07-11 18:14:41 -0700[diff] [blame]28#define LDC_MODE_STREAM 0x03
David S. Millere53e97c2007-07-09 22:22:44 -0700[diff] [blame]29
30 u8 debug;
31#define LDC_DEBUG_HS 0x01
32#define LDC_DEBUG_STATE 0x02
33#define LDC_DEBUG_RX 0x04
34#define LDC_DEBUG_TX 0x08
35#define LDC_DEBUG_DATA 0x10
36};
37
38#define LDC_EVENT_RESET 0x01
39#define LDC_EVENT_UP 0x02
40#define LDC_EVENT_DATA_READY 0x04
41
42#define LDC_STATE_INVALID 0x00
43#define LDC_STATE_INIT 0x01
44#define LDC_STATE_BOUND 0x02
45#define LDC_STATE_READY 0x03
46#define LDC_STATE_CONNECTED 0x04
47
48struct ldc_channel;
49
50/* Allocate state for a channel. */
51extern struct ldc_channel *ldc_alloc(unsigned long id,
52 const struct ldc_channel_config *cfgp,
53 void *event_arg);
54
55/* Shut down and free state for a channel. */
56extern void ldc_free(struct ldc_channel *lp);
57
58/* Register TX and RX queues of the link with the hypervisor. */
David S. Miller133f09a2007-07-11 23:22:55 -0700[diff] [blame^]59extern int ldc_bind(struct ldc_channel *lp, const char *name);
David S. Millere53e97c2007-07-09 22:22:44 -0700[diff] [blame]60
61/* For non-RAW protocols we need to complete a handshake before
62 * communication can proceed. ldc_connect() does that, if the
63 * handshake completes successfully, an LDC_EVENT_UP event will
64 * be sent up to the driver.
65 */
66extern int ldc_connect(struct ldc_channel *lp);
67extern int ldc_disconnect(struct ldc_channel *lp);
68
69extern int ldc_state(struct ldc_channel *lp);
70
71/* Read and write operations. Only valid when the link is up. */
72extern int ldc_write(struct ldc_channel *lp, const void *buf,
73 unsigned int size);
74extern int ldc_read(struct ldc_channel *lp, void *buf, unsigned int size);
75
76#define LDC_MAP_SHADOW 0x01
77#define LDC_MAP_DIRECT 0x02
78#define LDC_MAP_IO 0x04
79#define LDC_MAP_R 0x08
80#define LDC_MAP_W 0x10
81#define LDC_MAP_X 0x20
82#define LDC_MAP_RW (LDC_MAP_R | LDC_MAP_W)
83#define LDC_MAP_RWX (LDC_MAP_R | LDC_MAP_W | LDC_MAP_X)
84#define LDC_MAP_ALL 0x03f
85
86struct ldc_trans_cookie {
87 u64 cookie_addr;
88 u64 cookie_size;
89};
90
91struct scatterlist;
92extern int ldc_map_sg(struct ldc_channel *lp,
93 struct scatterlist *sg, int num_sg,
94 struct ldc_trans_cookie *cookies, int ncookies,
95 unsigned int map_perm);
96
97extern int ldc_map_single(struct ldc_channel *lp,
98 void *buf, unsigned int len,
99 struct ldc_trans_cookie *cookies, int ncookies,
100 unsigned int map_perm);
101
102extern void ldc_unmap(struct ldc_channel *lp, struct ldc_trans_cookie *cookies,
103 int ncookies);
104
105extern int ldc_copy(struct ldc_channel *lp, int copy_dir,
106 void *buf, unsigned int len, unsigned long offset,
107 struct ldc_trans_cookie *cookies, int ncookies);
108
109static inline int ldc_get_dring_entry(struct ldc_channel *lp,
110 void *buf, unsigned int len,
111 unsigned long offset,
112 struct ldc_trans_cookie *cookies,
113 int ncookies)
114{
115 return ldc_copy(lp, LDC_COPY_IN, buf, len, offset, cookies, ncookies);
116}
117
118static inline int ldc_put_dring_entry(struct ldc_channel *lp,
119 void *buf, unsigned int len,
120 unsigned long offset,
121 struct ldc_trans_cookie *cookies,
122 int ncookies)
123{
124 return ldc_copy(lp, LDC_COPY_OUT, buf, len, offset, cookies, ncookies);
125}
126
127extern void *ldc_alloc_exp_dring(struct ldc_channel *lp, unsigned int len,
128 struct ldc_trans_cookie *cookies,
129 int *ncookies, unsigned int map_perm);
130
131extern void ldc_free_exp_dring(struct ldc_channel *lp, void *buf,
132 unsigned int len,
133 struct ldc_trans_cookie *cookies, int ncookies);
134
135#endif /* _SPARC64_LDC_H */