papr-hvpipe.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2#ifndef _PAPR_HVPIPE_H
 3#define _PAPR_HVPIPE_H
 4
 5#define	HVPIPE_HMC_ID_MASK	0x02000000 /*02-HMC,00-reserved and HMC ID */
 6#define	HVPIPE_MAX_WRITE_BUFFER_SIZE	4048
 7/*
 8 * hvpipe specific RTAS return values
 9 */
10#define	RTAS_HVPIPE_CLOSED		-4
11
12#define	HVPIPE_HDR_LEN	sizeof(struct papr_hvpipe_hdr)
13
14enum hvpipe_migrate_action {
15	HVPIPE_SUSPEND,
16	HVPIPE_RESUME,
17};
18
19struct hvpipe_source_info {
20	struct list_head list;	/* list of sources */
21	u32 srcID;
22	u32 hvpipe_status;
23	wait_queue_head_t recv_wqh;	 /* wake up poll() waitq */
24	struct task_struct *tsk;
25};
26
27/*
28 * Source ID Format 0xCCRRQQQQ
29 * CC = indicating value is source type (ex: 0x02 for HMC)
30 * RR = 0x00 (reserved)
31 * QQQQ = 0x0000 – 0xFFFF indicating the source index indetifier
32 */
33struct hvpipe_event_buf {
34	__be32	srcID;		/* Source ID */
35	u8	event_type;	/* 0x01 for hvpipe message available */
36				/* from specified src ID */
37				/* 0x02 for loss of pipe connection */
38				/* with specified src ID */
39};
40
41void hvpipe_migration_handler(int action);
42#endif /* _PAPR_HVPIPE_H */