4 #include <asm/hypervisor.h>
6 extern int ldom_domaining_enabled;
7 extern void ldom_set_var(const char *var, const char *value);
8 extern void ldom_reboot(const char *boot_command);
10 /* The event handler will be evoked when link state changes
11 * or data becomes available on the receive side.
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.
17 * For RAW links, ldc_connect() is not used. Instead the driver
18 * just waits for the LDC_EVENT_UP event.
20 struct ldc_channel_config {
21 void (*event)(void *arg, int event);
27 #define LDC_MODE_RAW 0x00
28 #define LDC_MODE_UNRELIABLE 0x01
29 #define LDC_MODE_RESERVED 0x02
30 #define LDC_MODE_STREAM 0x03
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
40 #define LDC_EVENT_RESET 0x01
41 #define LDC_EVENT_UP 0x02
42 #define LDC_EVENT_DATA_READY 0x04
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
52 /* Allocate state for a channel. */
53 extern struct ldc_channel *ldc_alloc(unsigned long id,
54 const struct ldc_channel_config *cfgp,
57 /* Shut down and free state for a channel. */
58 extern void ldc_free(struct ldc_channel *lp);
60 /* Register TX and RX queues of the link with the hypervisor. */
61 extern int ldc_bind(struct ldc_channel *lp, const char *name);
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.
68 extern int ldc_connect(struct ldc_channel *lp);
69 extern int ldc_disconnect(struct ldc_channel *lp);
71 extern int ldc_state(struct ldc_channel *lp);
73 /* Read and write operations. Only valid when the link is up. */
74 extern int ldc_write(struct ldc_channel *lp, const void *buf,
76 extern int ldc_read(struct ldc_channel *lp, void *buf, unsigned int size);
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
88 struct ldc_trans_cookie {
94 extern 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);
99 extern 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);
104 extern void ldc_unmap(struct ldc_channel *lp, struct ldc_trans_cookie *cookies,
107 extern 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);
111 static 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,
117 return ldc_copy(lp, LDC_COPY_IN, buf, len, offset, cookies, ncookies);
120 static 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,
126 return ldc_copy(lp, LDC_COPY_OUT, buf, len, offset, cookies, ncookies);
129 extern 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);
133 extern void ldc_free_exp_dring(struct ldc_channel *lp, void *buf,
135 struct ldc_trans_cookie *cookies, int ncookies);
137 #endif /* _SPARC64_LDC_H */