1 #ifndef _SPARC64_LDC_H
2 #define _SPARC64_LDC_H
3
4 #include <asm/hypervisor.h>
5
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);
9 extern void ldom_power_off(void);
10
11 /* The event handler will be evoked when link state changes
12 * or data becomes available on the receive side.
13 *
14 * For non-RAW links, if the LDC_EVENT_RESET event arrives the
15 * driver should reset all of it's internal state and reinvoke
16 * ldc_connect() to try and bring the link up again.
17 *
18 * For RAW links, ldc_connect() is not used. Instead the driver
19 * just waits for the LDC_EVENT_UP event.
20 */
21 struct ldc_channel_config {
22 void (*event)(void *arg, int event);
23
24 u32 mtu;
25 unsigned int rx_irq;
26 unsigned int tx_irq;
27 u8 mode;
28 #define LDC_MODE_RAW 0x00
29 #define LDC_MODE_UNRELIABLE 0x01
30 #define LDC_MODE_RESERVED 0x02
31 #define LDC_MODE_STREAM 0x03
32
33 u8 debug;
34 #define LDC_DEBUG_HS 0x01
35 #define LDC_DEBUG_STATE 0x02
36 #define LDC_DEBUG_RX 0x04
37 #define LDC_DEBUG_TX 0x08
38 #define LDC_DEBUG_DATA 0x10
39 };
40
41 #define LDC_EVENT_RESET 0x01
42 #define LDC_EVENT_UP 0x02
43 #define LDC_EVENT_DATA_READY 0x04
44
45 #define LDC_STATE_INVALID 0x00
46 #define LDC_STATE_INIT 0x01
47 #define LDC_STATE_BOUND 0x02
48 #define LDC_STATE_READY 0x03
49 #define LDC_STATE_CONNECTED 0x04
50
51 struct ldc_channel;
52
53 /* Allocate state for a channel. */
54 extern struct ldc_channel *ldc_alloc(unsigned long id,
55 const struct ldc_channel_config *cfgp,
56 void *event_arg);
57
58 /* Shut down and free state for a channel. */
59 extern void ldc_free(struct ldc_channel *lp);
60
61 /* Register TX and RX queues of the link with the hypervisor. */
62 extern int ldc_bind(struct ldc_channel *lp, const char *name);
63
64 /* For non-RAW protocols we need to complete a handshake before
65 * communication can proceed. ldc_connect() does that, if the
66 * handshake completes successfully, an LDC_EVENT_UP event will
67 * be sent up to the driver.
68 */
69 extern int ldc_connect(struct ldc_channel *lp);
70 extern int ldc_disconnect(struct ldc_channel *lp);
71
72 extern int ldc_state(struct ldc_channel *lp);
73
74 /* Read and write operations. Only valid when the link is up. */
75 extern int ldc_write(struct ldc_channel *lp, const void *buf,
76 unsigned int size);
77 extern int ldc_read(struct ldc_channel *lp, void *buf, unsigned int size);
78
79 #define LDC_MAP_SHADOW 0x01
80 #define LDC_MAP_DIRECT 0x02
81 #define LDC_MAP_IO 0x04
82 #define LDC_MAP_R 0x08
83 #define LDC_MAP_W 0x10
84 #define LDC_MAP_X 0x20
85 #define LDC_MAP_RW (LDC_MAP_R | LDC_MAP_W)
86 #define LDC_MAP_RWX (LDC_MAP_R | LDC_MAP_W | LDC_MAP_X)
87 #define LDC_MAP_ALL 0x03f
88
89 struct ldc_trans_cookie {
90 u64 cookie_addr;
91 u64 cookie_size;
92 };
93
94 struct scatterlist;
95 extern int ldc_map_sg(struct ldc_channel *lp,
96 struct scatterlist *sg, int num_sg,
97 struct ldc_trans_cookie *cookies, int ncookies,
98 unsigned int map_perm);
99
100 extern int ldc_map_single(struct ldc_channel *lp,
101 void *buf, unsigned int len,
102 struct ldc_trans_cookie *cookies, int ncookies,
103 unsigned int map_perm);
104
105 extern void ldc_unmap(struct ldc_channel *lp, struct ldc_trans_cookie *cookies,
106 int ncookies);
107
108 extern int ldc_copy(struct ldc_channel *lp, int copy_dir,
109 void *buf, unsigned int len, unsigned long offset,
110 struct ldc_trans_cookie *cookies, int ncookies);
111
ldc_get_dring_entry(struct ldc_channel * lp,void * buf,unsigned int len,unsigned long offset,struct ldc_trans_cookie * cookies,int ncookies)112 static inline int ldc_get_dring_entry(struct ldc_channel *lp,
113 void *buf, unsigned int len,
114 unsigned long offset,
115 struct ldc_trans_cookie *cookies,
116 int ncookies)
117 {
118 return ldc_copy(lp, LDC_COPY_IN, buf, len, offset, cookies, ncookies);
119 }
120
ldc_put_dring_entry(struct ldc_channel * lp,void * buf,unsigned int len,unsigned long offset,struct ldc_trans_cookie * cookies,int ncookies)121 static inline int ldc_put_dring_entry(struct ldc_channel *lp,
122 void *buf, unsigned int len,
123 unsigned long offset,
124 struct ldc_trans_cookie *cookies,
125 int ncookies)
126 {
127 return ldc_copy(lp, LDC_COPY_OUT, buf, len, offset, cookies, ncookies);
128 }
129
130 extern void *ldc_alloc_exp_dring(struct ldc_channel *lp, unsigned int len,
131 struct ldc_trans_cookie *cookies,
132 int *ncookies, unsigned int map_perm);
133
134 extern void ldc_free_exp_dring(struct ldc_channel *lp, void *buf,
135 unsigned int len,
136 struct ldc_trans_cookie *cookies, int ncookies);
137
138 #endif /* _SPARC64_LDC_H */
139