xref: /onnv-gate/usr/src/uts/common/fs/sockfs/sodirect.h (revision 9491:2a8ac51063ac)
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22*9491SAnders.Persson@Sun.COM /*
23*9491SAnders.Persson@Sun.COM  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24*9491SAnders.Persson@Sun.COM  * Use is subject to license terms.
25*9491SAnders.Persson@Sun.COM  */
26*9491SAnders.Persson@Sun.COM 
27*9491SAnders.Persson@Sun.COM /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
28*9491SAnders.Persson@Sun.COM /*	  All Rights Reserved  	*/
29*9491SAnders.Persson@Sun.COM 
30*9491SAnders.Persson@Sun.COM /*
31*9491SAnders.Persson@Sun.COM  * University Copyright- Copyright (c) 1982, 1986, 1988
32*9491SAnders.Persson@Sun.COM  * The Regents of the University of California
33*9491SAnders.Persson@Sun.COM  * All Rights Reserved
34*9491SAnders.Persson@Sun.COM  *
35*9491SAnders.Persson@Sun.COM  * University Acknowledgment- Portions of this document are derived from
36*9491SAnders.Persson@Sun.COM  * software developed by the University of California, Berkeley, and its
37*9491SAnders.Persson@Sun.COM  * contributors.
38*9491SAnders.Persson@Sun.COM  */
39*9491SAnders.Persson@Sun.COM 
40*9491SAnders.Persson@Sun.COM #ifndef _SOCKFS_SODIRECT_H
41*9491SAnders.Persson@Sun.COM #define	_SOCKFS_SODIRECT_H
42*9491SAnders.Persson@Sun.COM 
43*9491SAnders.Persson@Sun.COM /*
44*9491SAnders.Persson@Sun.COM  * Sodirect; used to support asynchronous DMA hardware
45*9491SAnders.Persson@Sun.COM  * (e.g. Intel's I/OAT).
46*9491SAnders.Persson@Sun.COM  */
47*9491SAnders.Persson@Sun.COM 
48*9491SAnders.Persson@Sun.COM #ifdef	__cplusplus
49*9491SAnders.Persson@Sun.COM extern "C" {
50*9491SAnders.Persson@Sun.COM #endif
51*9491SAnders.Persson@Sun.COM 
52*9491SAnders.Persson@Sun.COM typedef struct sodirect_s {
53*9491SAnders.Persson@Sun.COM 	boolean_t	sod_enabled;	/* sodirect_t enabled */
54*9491SAnders.Persson@Sun.COM 	mblk_t		*sod_uioafh;	/* To be freed list head, or NULL */
55*9491SAnders.Persson@Sun.COM 	mblk_t		*sod_uioaft;	/* To be freed list tail */
56*9491SAnders.Persson@Sun.COM 	uioa_t		sod_uioa;	/* Pending uio_t for uioa_t use */
57*9491SAnders.Persson@Sun.COM } sodirect_t;
58*9491SAnders.Persson@Sun.COM 
59*9491SAnders.Persson@Sun.COM /*
60*9491SAnders.Persson@Sun.COM  * Usefull macros:
61*9491SAnders.Persson@Sun.COM  */
62*9491SAnders.Persson@Sun.COM #define	SOD_DISABLE(sodp) {		\
63*9491SAnders.Persson@Sun.COM 	(sodp)->sod_enabled = B_FALSE;	\
64*9491SAnders.Persson@Sun.COM }
65*9491SAnders.Persson@Sun.COM 
66*9491SAnders.Persson@Sun.COM #define	SOD_SOTOSODP(so) ((sonode_t *)so)->so_direct
67*9491SAnders.Persson@Sun.COM 
68*9491SAnders.Persson@Sun.COM #define	SOD_UIOAFINI(sodp) {						\
69*9491SAnders.Persson@Sun.COM 	if ((sodp)->sod_uioa.uioa_state & UIOA_ENABLED) {		\
70*9491SAnders.Persson@Sun.COM 		(sodp)->sod_uioa.uioa_state &= UIOA_CLR;		\
71*9491SAnders.Persson@Sun.COM 		(sodp)->sod_uioa.uioa_state |= UIOA_FINI;		\
72*9491SAnders.Persson@Sun.COM 	}								\
73*9491SAnders.Persson@Sun.COM }
74*9491SAnders.Persson@Sun.COM 
75*9491SAnders.Persson@Sun.COM struct sonode;
76*9491SAnders.Persson@Sun.COM struct sodirect_s;
77*9491SAnders.Persson@Sun.COM 
78*9491SAnders.Persson@Sun.COM extern uio_t	*sod_rcv_init(struct sonode *, int, struct uio **);
79*9491SAnders.Persson@Sun.COM extern int	sod_rcv_done(struct sonode *, struct uio *, struct uio *);
80*9491SAnders.Persson@Sun.COM 
81*9491SAnders.Persson@Sun.COM extern void	sod_uioa_mblk_init(struct sodirect_s *, mblk_t *, size_t);
82*9491SAnders.Persson@Sun.COM extern void	sod_uioa_so_init(struct sonode *, struct sodirect_s *,
83*9491SAnders.Persson@Sun.COM     struct uio *);
84*9491SAnders.Persson@Sun.COM extern ssize_t	sod_uioa_mblk(struct sonode *, mblk_t *);
85*9491SAnders.Persson@Sun.COM extern void	sod_uioa_mblk_done(struct sodirect_s *, mblk_t *);
86*9491SAnders.Persson@Sun.COM 
87*9491SAnders.Persson@Sun.COM extern int	sod_init(void);
88*9491SAnders.Persson@Sun.COM extern void	sod_sock_init(struct sonode *);
89*9491SAnders.Persson@Sun.COM extern void	sod_sock_fini(struct sonode *);
90*9491SAnders.Persson@Sun.COM 
91*9491SAnders.Persson@Sun.COM #ifdef	__cplusplus
92*9491SAnders.Persson@Sun.COM }
93*9491SAnders.Persson@Sun.COM #endif
94*9491SAnders.Persson@Sun.COM 
95*9491SAnders.Persson@Sun.COM #endif	/* _SOCKFS_SODIRECT_H */
96