1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef _SYS_UIO_H_ 33 #define _SYS_UIO_H_ 34 35 #include <sys/cdefs.h> 36 #include <sys/_types.h> 37 #include <sys/_iovec.h> 38 #include <sys/_uio.h> 39 40 #ifndef _SSIZE_T_DECLARED 41 typedef __ssize_t ssize_t; 42 #define _SSIZE_T_DECLARED 43 #endif 44 45 #ifndef _OFF_T_DECLARED 46 typedef __off_t off_t; 47 #define _OFF_T_DECLARED 48 #endif 49 50 #ifdef _KERNEL 51 52 struct uio { 53 struct iovec *uio_iov; /* scatter/gather list */ 54 int uio_iovcnt; /* length of scatter/gather list */ 55 off_t uio_offset; /* offset in target object */ 56 ssize_t uio_resid; /* remaining bytes to process */ 57 enum uio_seg uio_segflg; /* address space */ 58 enum uio_rw uio_rw; /* operation */ 59 struct thread *uio_td; /* owner */ 60 }; 61 62 /* 63 * Limits 64 * 65 * N.B.: UIO_MAXIOV must be no less than IOV_MAX from <sys/syslimits.h> 66 * which in turn must be no less than _XOPEN_IOV_MAX from <limits.h>. If 67 * we ever make this tunable (probably pointless), then IOV_MAX should be 68 * removed from <sys/syslimits.h> and applications would be expected to use 69 * sysconf(3) to find out the correct value, or else assume the worst 70 * (_XOPEN_IOV_MAX). Perhaps UIO_MAXIOV should be simply defined as 71 * IOV_MAX. 72 */ 73 #define UIO_MAXIOV 1024 /* max 1K of iov's */ 74 75 struct vm_object; 76 struct vm_page; 77 struct bus_dma_segment; 78 79 struct uio *allocuio(u_int iovcnt); 80 void freeuio(struct uio *uio); 81 struct uio *cloneuio(struct uio *uiop); 82 int copyiniov(const struct iovec *iovp, u_int iovcnt, struct iovec **iov, 83 int error); 84 int copyinuio(const struct iovec *iovp, u_int iovcnt, struct uio **uiop); 85 int copyout_map(struct thread *td, vm_offset_t *addr, size_t sz); 86 int copyout_unmap(struct thread *td, vm_offset_t addr, size_t sz); 87 int physcopyin(void *src, vm_paddr_t dst, size_t len); 88 int physcopyout(vm_paddr_t src, void *dst, size_t len); 89 int physcopyin_vlist(struct bus_dma_segment *src, off_t offset, 90 vm_paddr_t dst, size_t len); 91 int physcopyout_vlist(vm_paddr_t src, struct bus_dma_segment *dst, 92 off_t offset, size_t len); 93 int uiomove(void *cp, int n, struct uio *uio); 94 int uiomove_frombuf(void *buf, int buflen, struct uio *uio); 95 int uiomove_fromphys(struct vm_page *ma[], vm_offset_t offset, int n, 96 struct uio *uio); 97 int uiomove_nofault(void *cp, int n, struct uio *uio); 98 int uiomove_object(struct vm_object *obj, off_t obj_size, struct uio *uio); 99 100 #else /* !_KERNEL */ 101 102 __BEGIN_DECLS 103 ssize_t readv(int, const struct iovec *, int); 104 ssize_t writev(int, const struct iovec *, int); 105 #if __BSD_VISIBLE 106 ssize_t preadv(int, const struct iovec *, int, off_t); 107 ssize_t pwritev(int, const struct iovec *, int, off_t); 108 #endif 109 __END_DECLS 110 111 #endif /* _KERNEL */ 112 113 #endif /* !_SYS_UIO_H_ */ 114