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1 | /*****************************************************************************\ |
2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
3 | * Copyright (C) 2007 The Regents of the University of California. | |
4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
6 | * UCRL-CODE-235197 | |
7 | * | |
8 | * This file is part of the SPL, Solaris Porting Layer. | |
9 | * For details, see <http://github.com/behlendorf/spl/>. | |
10 | * | |
11 | * The SPL is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | * | |
16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT | |
17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | * for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. | |
23 | \*****************************************************************************/ | |
24 | ||
6adf99e7 | 25 | #ifndef _SPL_UIO_H |
26 | #define _SPL_UIO_H | |
27 | ||
73e540a0 | 28 | #include <linux/uio.h> |
29 | #include <asm/uaccess.h> | |
30 | #include <sys/types.h> | |
31 | ||
bb1bb2c4 BB |
32 | typedef struct iovec iovec_t; |
33 | ||
4b171585 | 34 | typedef enum uio_rw { |
35 | UIO_READ = 0, | |
36 | UIO_WRITE = 1, | |
37 | } uio_rw_t; | |
6adf99e7 | 38 | |
73e540a0 | 39 | typedef enum uio_seg { |
40 | UIO_USERSPACE = 0, | |
41 | UIO_SYSSPACE = 1, | |
bb1bb2c4 | 42 | UIO_USERISPACE= 2, |
73e540a0 | 43 | } uio_seg_t; |
44 | ||
45 | typedef struct uio { | |
bb1bb2c4 BB |
46 | struct iovec *uio_iov; |
47 | int uio_iovcnt; | |
48 | offset_t uio_loffset; | |
49 | uio_seg_t uio_segflg; | |
50 | uint16_t uio_fmode; | |
51 | uint16_t uio_extflg; | |
52 | offset_t uio_limit; | |
53 | ssize_t uio_resid; | |
73e540a0 | 54 | } uio_t; |
55 | ||
56 | typedef struct aio_req { | |
bb1bb2c4 | 57 | uio_t *aio_uio; |
73e540a0 | 58 | void *aio_private; |
59 | } aio_req_t; | |
60 | ||
bb1bb2c4 BB |
61 | typedef enum xuio_type { |
62 | UIOTYPE_ASYNCIO, | |
63 | UIOTYPE_ZEROCOPY, | |
64 | } xuio_type_t; | |
65 | ||
66 | ||
67 | #define UIOA_IOV_MAX 16 | |
68 | ||
69 | typedef struct uioa_page_s { | |
70 | int uioa_pfncnt; | |
71 | void **uioa_ppp; | |
72 | caddr_t uioa_base; | |
73 | size_t uioa_len; | |
74 | } uioa_page_t; | |
75 | ||
76 | typedef struct xuio { | |
77 | uio_t xu_uio; | |
78 | enum xuio_type xu_type; | |
79 | union { | |
80 | struct { | |
81 | uint32_t xu_a_state; | |
82 | ssize_t xu_a_mbytes; | |
83 | uioa_page_t *xu_a_lcur; | |
84 | void **xu_a_lppp; | |
85 | void *xu_a_hwst[4]; | |
86 | uioa_page_t xu_a_locked[UIOA_IOV_MAX]; | |
87 | } xu_aio; | |
88 | ||
89 | struct { | |
90 | int xu_zc_rw; | |
91 | void *xu_zc_priv; | |
92 | } xu_zc; | |
93 | } xu_ext; | |
94 | } xuio_t; | |
95 | ||
96 | #define XUIO_XUZC_PRIV(xuio) xuio->xu_ext.xu_zc.xu_zc_priv | |
97 | #define XUIO_XUZC_RW(xuio) xuio->xu_ext.xu_zc.xu_zc_rw | |
98 | ||
6adf99e7 | 99 | #endif /* SPL_UIO_H */ |