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gerrit-public.fairphone.software / kernel / msm-5.4 / b3e13fbeb9ac1eb8e7b0791bf56e1775c692972b / . / include / asm-sparc64 / ldc.h
blob: a21996c6b15574818428891e68ef2f484a0116a7 [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;
David S. Millerb3e13fb2007-07-12 15:55:55 -0700[diff] [blame^]7extern void ldom_set_var(const char *var, const char *value);
8extern void ldom_reboot(const char *boot_command);
David S. Millere53e97c2007-07-09 22:22:44 -0700[diff] [blame]9
10/* The event handler will be evoked when link state changes
11 * or data becomes available on the receive side.
12 *
13 * For non-RAW links, if the LDC_EVENT_RESET event arrives the
14 * driver should reset all of it's internal state and reinvoke
15 * ldc_connect() to try and bring the link up again.
16 *
17 * For RAW links, ldc_connect() is not used. Instead the driver
18 * just waits for the LDC_EVENT_UP event.
19 */
20struct ldc_channel_config {
21 void (*event)(void *arg, int event);
22
23 u32 mtu;
24 unsigned int rx_irq;
25 unsigned int tx_irq;
26 u8 mode;
27#define LDC_MODE_RAW 0x00
28#define LDC_MODE_UNRELIABLE 0x01
29#define LDC_MODE_RESERVED 0x02
David S. Millercb481232007-07-11 18:14:41 -0700[diff] [blame]30#define LDC_MODE_STREAM 0x03
David S. Millere53e97c2007-07-09 22:22:44 -0700[diff] [blame]31
32 u8 debug;
33#define LDC_DEBUG_HS 0x01
34#define LDC_DEBUG_STATE 0x02
35#define LDC_DEBUG_RX 0x04
36#define LDC_DEBUG_TX 0x08
37#define LDC_DEBUG_DATA 0x10
38};
39
40#define LDC_EVENT_RESET 0x01
41#define LDC_EVENT_UP 0x02
42#define LDC_EVENT_DATA_READY 0x04
43
44#define LDC_STATE_INVALID 0x00
45#define LDC_STATE_INIT 0x01
46#define LDC_STATE_BOUND 0x02
47#define LDC_STATE_READY 0x03
48#define LDC_STATE_CONNECTED 0x04
49
50struct ldc_channel;
51
52/* Allocate state for a channel. */
53extern struct ldc_channel *ldc_alloc(unsigned long id,
54 const struct ldc_channel_config *cfgp,
55 void *event_arg);
56
57/* Shut down and free state for a channel. */
58extern void ldc_free(struct ldc_channel *lp);
59
60/* Register TX and RX queues of the link with the hypervisor. */
David S. Miller133f09a2007-07-11 23:22:55 -0700[diff] [blame]61extern int ldc_bind(struct ldc_channel *lp, const char *name);
David S. Millere53e97c2007-07-09 22:22:44 -0700[diff] [blame]62
63/* For non-RAW protocols we need to complete a handshake before
64 * communication can proceed. ldc_connect() does that, if the
65 * handshake completes successfully, an LDC_EVENT_UP event will
66 * be sent up to the driver.
67 */
68extern int ldc_connect(struct ldc_channel *lp);
69extern int ldc_disconnect(struct ldc_channel *lp);
70
71extern int ldc_state(struct ldc_channel *lp);
72
73/* Read and write operations. Only valid when the link is up. */
74extern int ldc_write(struct ldc_channel *lp, const void *buf,
75 unsigned int size);
76extern int ldc_read(struct ldc_channel *lp, void *buf, unsigned int size);
77
78#define LDC_MAP_SHADOW 0x01
79#define LDC_MAP_DIRECT 0x02
80#define LDC_MAP_IO 0x04
81#define LDC_MAP_R 0x08
82#define LDC_MAP_W 0x10
83#define LDC_MAP_X 0x20
84#define LDC_MAP_RW (LDC_MAP_R | LDC_MAP_W)
85#define LDC_MAP_RWX (LDC_MAP_R | LDC_MAP_W | LDC_MAP_X)
86#define LDC_MAP_ALL 0x03f
87
88struct ldc_trans_cookie {
89 u64 cookie_addr;
90 u64 cookie_size;
91};
92
93struct scatterlist;
94extern int ldc_map_sg(struct ldc_channel *lp,
95 struct scatterlist *sg, int num_sg,
96 struct ldc_trans_cookie *cookies, int ncookies,
97 unsigned int map_perm);
98
99extern int ldc_map_single(struct ldc_channel *lp,
100 void *buf, unsigned int len,
101 struct ldc_trans_cookie *cookies, int ncookies,
102 unsigned int map_perm);
103
104extern void ldc_unmap(struct ldc_channel *lp, struct ldc_trans_cookie *cookies,
105 int ncookies);
106
107extern int ldc_copy(struct ldc_channel *lp, int copy_dir,
108 void *buf, unsigned int len, unsigned long offset,
109 struct ldc_trans_cookie *cookies, int ncookies);
110
111static inline int ldc_get_dring_entry(struct ldc_channel *lp,
112 void *buf, unsigned int len,
113 unsigned long offset,
114 struct ldc_trans_cookie *cookies,
115 int ncookies)
116{
117 return ldc_copy(lp, LDC_COPY_IN, buf, len, offset, cookies, ncookies);
118}
119
120static inline int ldc_put_dring_entry(struct ldc_channel *lp,
121 void *buf, unsigned int len,
122 unsigned long offset,
123 struct ldc_trans_cookie *cookies,
124 int ncookies)
125{
126 return ldc_copy(lp, LDC_COPY_OUT, buf, len, offset, cookies, ncookies);
127}
128
129extern void *ldc_alloc_exp_dring(struct ldc_channel *lp, unsigned int len,
130 struct ldc_trans_cookie *cookies,
131 int *ncookies, unsigned int map_perm);
132
133extern void ldc_free_exp_dring(struct ldc_channel *lp, void *buf,
134 unsigned int len,
135 struct ldc_trans_cookie *cookies, int ncookies);
136
137#endif /* _SPARC64_LDC_H */