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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _SPARC64_LDC_H #define _SPARC64_LDC_H #include <asm/hypervisor.h> extern int ldom_domaining_enabled; void ldom_set_var(const char *var, const char *value); void ldom_reboot(const char *boot_command); void ldom_power_off(void); /* The event handler will be evoked when link state changes * or data becomes available on the receive side. * * For non-RAW links, if the LDC_EVENT_RESET event arrives the * driver should reset all of it's internal state and reinvoke * ldc_connect() to try and bring the link up again. * * For RAW links, ldc_connect() is not used. Instead the driver * just waits for the LDC_EVENT_UP event. */ struct ldc_channel_config { void (*event)(void *arg, int event); u32 mtu; unsigned int rx_irq; unsigned int tx_irq; u8 mode; #define LDC_MODE_RAW 0x00 #define LDC_MODE_UNRELIABLE 0x01 #define LDC_MODE_RESERVED 0x02 #define LDC_MODE_STREAM 0x03 u8 debug; #define LDC_DEBUG_HS 0x01 #define LDC_DEBUG_STATE 0x02 #define LDC_DEBUG_RX 0x04 #define LDC_DEBUG_TX 0x08 #define LDC_DEBUG_DATA 0x10 }; #define LDC_EVENT_RESET 0x01 #define LDC_EVENT_UP 0x02 #define LDC_EVENT_DATA_READY 0x04 #define LDC_STATE_INVALID 0x00 #define LDC_STATE_INIT 0x01 #define LDC_STATE_BOUND 0x02 #define LDC_STATE_READY 0x03 #define LDC_STATE_CONNECTED 0x04 #define LDC_PACKET_SIZE 64 struct ldc_channel; /* Allocate state for a channel. */ struct ldc_channel *ldc_alloc(unsigned long id, const struct ldc_channel_config *cfgp, void *event_arg, const char *name); /* Shut down and free state for a channel. */ void ldc_free(struct ldc_channel *lp); /* Register TX and RX queues of the link with the hypervisor. */ int ldc_bind(struct ldc_channel *lp); void ldc_unbind(struct ldc_channel *lp); /* For non-RAW protocols we need to complete a handshake before * communication can proceed. ldc_connect() does that, if the * handshake completes successfully, an LDC_EVENT_UP event will * be sent up to the driver. */ int ldc_connect(struct ldc_channel *lp); int ldc_disconnect(struct ldc_channel *lp); int ldc_state(struct ldc_channel *lp); void ldc_set_state(struct ldc_channel *lp, u8 state); int ldc_mode(struct ldc_channel *lp); void __ldc_print(struct ldc_channel *lp, const char *caller); int ldc_rx_reset(struct ldc_channel *lp); #define ldc_print(chan) __ldc_print(chan, __func__) /* Read and write operations. Only valid when the link is up. */ int ldc_write(struct ldc_channel *lp, const void *buf, unsigned int size); int ldc_read(struct ldc_channel *lp, void *buf, unsigned int size); #define LDC_MAP_SHADOW 0x01 #define LDC_MAP_DIRECT 0x02 #define LDC_MAP_IO 0x04 #define LDC_MAP_R 0x08 #define LDC_MAP_W 0x10 #define LDC_MAP_X 0x20 #define LDC_MAP_RW (LDC_MAP_R | LDC_MAP_W) #define LDC_MAP_RWX (LDC_MAP_R | LDC_MAP_W | LDC_MAP_X) #define LDC_MAP_ALL 0x03f struct ldc_trans_cookie { u64 cookie_addr; u64 cookie_size; }; struct scatterlist; int ldc_map_sg(struct ldc_channel *lp, struct scatterlist *sg, int num_sg, struct ldc_trans_cookie *cookies, int ncookies, unsigned int map_perm); int ldc_map_single(struct ldc_channel *lp, void *buf, unsigned int len, struct ldc_trans_cookie *cookies, int ncookies, unsigned int map_perm); void ldc_unmap(struct ldc_channel *lp, struct ldc_trans_cookie *cookies, int ncookies); int ldc_copy(struct ldc_channel *lp, int copy_dir, void *buf, unsigned int len, unsigned long offset, struct ldc_trans_cookie *cookies, int ncookies); static inline int ldc_get_dring_entry(struct ldc_channel *lp, void *buf, unsigned int len, unsigned long offset, struct ldc_trans_cookie *cookies, int ncookies) { return ldc_copy(lp, LDC_COPY_IN, buf, len, offset, cookies, ncookies); } static inline int ldc_put_dring_entry(struct ldc_channel *lp, void *buf, unsigned int len, unsigned long offset, struct ldc_trans_cookie *cookies, int ncookies) { return ldc_copy(lp, LDC_COPY_OUT, buf, len, offset, cookies, ncookies); } void *ldc_alloc_exp_dring(struct ldc_channel *lp, unsigned int len, struct ldc_trans_cookie *cookies, int *ncookies, unsigned int map_perm); void ldc_free_exp_dring(struct ldc_channel *lp, void *buf, unsigned int len, struct ldc_trans_cookie *cookies, int ncookies); #endif /* _SPARC64_LDC_H */
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