xref: /titanic_52/usr/src/uts/sun4/io/px/px_msiq.h (revision 4088bb40326b75ef60834a6c2a92e29e25474b68)
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
32 extern "C" {
33 #endif
34 
35 /*
36  * MSIQ data structure.
37  */
38 struct px_msiq {
39 	msiqid_t	msiq_id;	/* MSIQ ID */
40 	uint_t		msiq_state;	/* MSIQ alloc state */
41 	msiqhead_t	msiq_curr_head_idx; /* MSIQ current head */
42 	msiqhead_t	*msiq_base_p;	/* MSIQ base pointer */
43 };
44 
45 #define	MSIQ_STATE_FREE		0x1
46 #define	MSIQ_STATE_INUSE	0x2
47 
48 /*
49  * MSIQ soft state structure.
50  */
51 typedef struct px_msiq_state {
52 	/* Available MSIQs */
53 	uint_t		msiq_cnt;	/* # of MSIQs */
54 	uint_t		msiq_rec_cnt;	/* # of records per MSIQ */
55 	msiqid_t	msiq_1st_msiq_id; /* First MSIQ ID */
56 	devino_t	msiq_1st_devino; /* First devino */
57 
58 	/* MSIQs specific reserved for MSI/Xs */
59 	uint_t		msiq_msi_qcnt;	/* # of MSIQs for MSI/Xs */
60 	msiqid_t	msiq_1st_msi_qid; /* First MSIQ ID for MSI/Xs */
61 	msiqid_t	msiq_next_msi_qid; /* Next MSIQ index for MSI/Xs */
62 
63 	/* MSIQs specific reserved for PCIe messages */
64 	uint_t		msiq_msg_qcnt;	/* # of MSIQs for PCIe msgs */
65 	msiqid_t	msiq_1st_msg_qid; /* First MSIQ ID for PCIe msgs */
66 	msiqid_t	msiq_next_msg_qid; /* Next MSIQ index for PCIe msgs */
67 
68 	px_msiq_t	*msiq_p;	/* Pointer to MSIQs array */
69 	void		*msiq_buf_p; /* Pointer to MSIQs array */
70 	kmutex_t	msiq_mutex;	/* Mutex for MSIQ alloc/free */
71 } px_msiq_state_t;
72 
73 /*
74  * px_msi_eq_to_devino
75  */
76 typedef struct px_msi_eq_to_devino {
77 	int	msi_eq_no;
78 	int	no_msi_eqs;
79 	int	devino_no;
80 } px_msi_eq_to_devino_t;
81 
82 /*
83  * Default MSIQ Configurations
84  */
85 #define	PX_DEFAULT_MSIQ_CNT		36
86 #define	PX_DEFAULT_MSIQ_REC_CNT		128
87 #define	PX_DEFAULT_MSIQ_1ST_MSIQ_ID	0
88 #define	PX_DEFAULT_MSIQ_1ST_DEVINO	24
89 
90 extern	int	px_msiq_attach(px_t *px_p);
91 extern	void	px_msiq_detach(px_t *px_p);
92 extern	void	px_msiq_resume(px_t *px_p);
93 
94 extern	int	px_msiq_alloc(px_t *px_p, msiq_rec_type_t rec_type,
95 		    msiqid_t *msiq_id_p);
96 extern	int	px_msiq_free(px_t *px_p, msiqid_t msiq_id);
97 
98 extern  devino_t px_msiqid_to_devino(px_t *px_p, msiqid_t msiq_id);
99 extern  msiqid_t px_devino_to_msiqid(px_t *px_p, devino_t devino);
100 
101 #ifdef	__cplusplus
102 }
103 #endif
104 
105 #endif	/* _SYS_PX_MSIQ_H */
106