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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright (c) 2014, Joyent, Inc. All rights reserved.
*/
#ifndef _SYS_FRAMEIO_H
#define _SYS_FRAMEIO_H
/*
* Frame I/O definitions
*/
#include <sys/types.h>
#ifdef _KERNEL
/* Kernel only headers */
#include <sys/stream.h>
#endif /* _KERNEL */
#ifdef __cplusplus
extern "C" {
#endif
/*
* An individual frame vector component. Collections of these are used to make
* ioctls.
*/
typedef struct framevec {
void *fv_buf; /* Buffer with data */
size_t fv_buflen; /* Size of the buffer */
size_t fv_actlen; /* Amount of buffer consumed, ignore on error */
} framevec_t;
/*
* The base unit used with frameio.
*/
typedef struct frameio {
uint_t fio_version; /* Should always be FRAMEIO_CURRENT_VERSION */
uint_t fio_nvpf; /* How many vectors make up one frame */
uint_t fio_nvecs; /* The total number of vectors */
framevec_t fio_vecs[]; /* C99 VLA */
} frameio_t;
#define FRAMEIO_VERSION_ONE 1
#define FRAMEIO_CURRENT_VERSION FRAMEIO_VERSION_ONE
#define FRAMEIO_NVECS_MAX 32
/*
* Definitions for kernel modules to include as helpers. These are consolidation
* private.
*/
#ifdef _KERNEL
/*
* 32-bit versions for 64-bit kernels
*/
typedef struct framevec32 {
caddr32_t fv_buf;
size32_t fv_buflen;
size32_t fv_actlen;
} framevec32_t;
typedef struct frameio32 {
uint_t fio_version;
uint_t fio_vecspframe;
uint_t fio_nvecs;
framevec32_t fio_vecs[];
} frameio32_t;
/*
* Describe the different ways that vectors should map to frames.
*/
typedef enum frameio_write_mblk_map {
MAP_BLK_FRAME
} frameio_write_mblk_map_t;
int frameio_init(void);
void frameio_fini(void);
frameio_t *frameio_alloc(int);
void frameio_free(frameio_t *);
int frameio_hdr_copyin(frameio_t *, int, const void *, uint_t);
int frameio_mblk_chain_read(frameio_t *, mblk_t **, int *, int);
int frameio_mblk_chain_write(frameio_t *, frameio_write_mblk_map_t, mblk_t *,
int *, int);
int frameio_hdr_copyout(frameio_t *, int, void *, uint_t);
size_t frameio_frame_length(frameio_t *, framevec_t *);
void frameio_mark_consumed(frameio_t *, int);
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_FRAMEIO_H */
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