4 #include <asm/hypervisor.h>
6 extern int ldom_domaining_enabled;
8 /* The event handler will be evoked when link state changes
9 * or data becomes available on the receive side.
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.
15 * For RAW links, ldc_connect() is not used. Instead the driver
16 * just waits for the LDC_EVENT_UP event.
18 struct ldc_channel_config {
19 void (*event)(void *arg, int event);
25 #define LDC_MODE_RAW 0x00
26 #define LDC_MODE_UNRELIABLE 0x01
27 #define LDC_MODE_RESERVED 0x02
28 #define LDC_MODE_STREAM 0x03
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
38 #define LDC_EVENT_RESET 0x01
39 #define LDC_EVENT_UP 0x02
40 #define LDC_EVENT_DATA_READY 0x04
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
50 /* Allocate state for a channel. */
51 extern struct ldc_channel *ldc_alloc(unsigned long id,
52 const struct ldc_channel_config *cfgp,
55 /* Shut down and free state for a channel. */
56 extern void ldc_free(struct ldc_channel *lp);
58 /* Register TX and RX queues of the link with the hypervisor. */
59 extern int ldc_bind(struct ldc_channel *lp);
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.
66 extern int ldc_connect(struct ldc_channel *lp);
67 extern int ldc_disconnect(struct ldc_channel *lp);
69 extern int ldc_state(struct ldc_channel *lp);
71 /* Read and write operations. Only valid when the link is up. */
72 extern int ldc_write(struct ldc_channel *lp, const void *buf,
74 extern int ldc_read(struct ldc_channel *lp, void *buf, unsigned int size);
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
86 struct ldc_trans_cookie {
92 extern 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);
97 extern 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);
102 extern void ldc_unmap(struct ldc_channel *lp, struct ldc_trans_cookie *cookies,
105 extern 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);
109 static 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,
115 return ldc_copy(lp, LDC_COPY_IN, buf, len, offset, cookies, ncookies);
118 static 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,
124 return ldc_copy(lp, LDC_COPY_OUT, buf, len, offset, cookies, ncookies);
127 extern 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);
131 extern void ldc_free_exp_dring(struct ldc_channel *lp, void *buf,
133 struct ldc_trans_cookie *cookies, int ncookies);
135 #endif /* _SPARC64_LDC_H */