px_msiq.h revision 2973:55b674bffad9 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#ifndef	_SYS_PX_MSIQ_H
27#define	_SYS_PX_MSIQ_H
28
29#pragma ident	"%Z%%M%	%I%	%E% SMI"
30
31#ifdef	__cplusplus
32extern "C" {
33#endif
34
35/*
36 * MSIQ data structure.
37 */
38struct px_msiq {
39	msiqid_t	msiq_id;	/* MSIQ ID */
40	ushort_t	msiq_state;	/* MSIQ alloc state */
41	ushort_t	msiq_refcnt;	/* # of MSIQ users */
42	msiqhead_t	*msiq_base_p;	/* MSIQ base pointer */
43
44	/* Fields accessed under interrupt context */
45	msiqhead_t	msiq_curr_head_index; /* MSIQ Curr head index */
46	msiqhead_t	msiq_new_head_index; /* MSIQ new head index */
47	ushort_t	msiq_recs2process; /* # of MSIQ records to process */
48};
49
50#define	MSIQ_STATE_FREE		0x1
51#define	MSIQ_STATE_INUSE	0x2
52
53/*
54 * MSIQ soft state structure.
55 */
56typedef struct px_msiq_state {
57	/* Available MSIQs */
58	uint_t		msiq_cnt;	/* # of MSIQs */
59	uint_t		msiq_rec_cnt;	/* # of records per MSIQ */
60	msiqid_t	msiq_1st_msiq_id; /* First MSIQ ID */
61	devino_t	msiq_1st_devino; /* First devino */
62
63	/* MSIQs specific reserved for MSI/Xs */
64	uint_t		msiq_msi_qcnt;	/* # of MSIQs for MSI/Xs */
65	msiqid_t	msiq_1st_msi_qid; /* First MSIQ ID for MSI/Xs */
66	msiqid_t	msiq_next_msi_qid; /* Next MSIQ index for MSI/Xs */
67
68	/* MSIQs specific reserved for PCIe messages */
69	uint_t		msiq_msg_qcnt;	/* # of MSIQs for PCIe msgs */
70	msiqid_t	msiq_1st_msg_qid; /* First MSIQ ID for PCIe msgs */
71	msiqid_t	msiq_next_msg_qid; /* Next MSIQ index for PCIe msgs */
72
73	px_msiq_t	*msiq_p;	/* Pointer to MSIQs array */
74	void		*msiq_buf_p; /* Pointer to MSIQs array */
75	kmutex_t	msiq_mutex;	/* Mutex for MSIQ alloc/free */
76} px_msiq_state_t;
77
78/*
79 * px_msi_eq_to_devino
80 */
81typedef struct px_msi_eq_to_devino {
82	int	msi_eq_no;
83	int	no_msi_eqs;
84	int	devino_no;
85} px_msi_eq_to_devino_t;
86
87/*
88 * Default MSIQ Configurations
89 */
90#define	PX_DEFAULT_MSIQ_CNT		36
91#define	PX_DEFAULT_MSIQ_REC_CNT		128
92#define	PX_DEFAULT_MSIQ_1ST_MSIQ_ID	0
93#define	PX_DEFAULT_MSIQ_1ST_DEVINO	24
94
95extern	int	px_msiq_attach(px_t *px_p);
96extern	void	px_msiq_detach(px_t *px_p);
97extern	void	px_msiq_resume(px_t *px_p);
98
99extern	int	px_msiq_alloc(px_t *px_p, msiq_rec_type_t rec_type,
100		    msiqid_t *msiq_id_p);
101extern	int	px_msiq_free(px_t *px_p, msiqid_t msiq_id);
102
103extern  devino_t px_msiqid_to_devino(px_t *px_p, msiqid_t msiq_id);
104extern  msiqid_t px_devino_to_msiqid(px_t *px_p, devino_t devino);
105
106#ifdef	__cplusplus
107}
108#endif
109
110#endif	/* _SYS_PX_MSIQ_H */
111