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); 111 112 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 } 120 121 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