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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef _PAPR_HVPIPE_H
#define _PAPR_HVPIPE_H
#define HVPIPE_HMC_ID_MASK 0x02000000 /*02-HMC,00-reserved and HMC ID */
#define HVPIPE_MAX_WRITE_BUFFER_SIZE 4048
/*
* hvpipe specific RTAS return values
*/
#define RTAS_HVPIPE_CLOSED -4
#define HVPIPE_HDR_LEN sizeof(struct papr_hvpipe_hdr)
enum hvpipe_migrate_action {
HVPIPE_SUSPEND,
HVPIPE_RESUME,
};
struct hvpipe_source_info {
struct list_head list; /* list of sources */
u32 srcID;
u32 hvpipe_status;
wait_queue_head_t recv_wqh; /* wake up poll() waitq */
struct task_struct *tsk;
};
/*
* Source ID Format 0xCCRRQQQQ
* CC = indicating value is source type (ex: 0x02 for HMC)
* RR = 0x00 (reserved)
* QQQQ = 0x0000 – 0xFFFF indicating the source index indetifier
*/
struct hvpipe_event_buf {
__be32 srcID; /* Source ID */
u8 event_type; /* 0x01 for hvpipe message available */
/* from specified src ID */
/* 0x02 for loss of pipe connection */
/* with specified src ID */
};
void hvpipe_migration_handler(int action);
#endif /* _PAPR_HVPIPE_H */
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