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Diffstat (limited to 'cpukit/include/machine/_kernel_uio.h')
| -rw-r--r-- | cpukit/include/machine/_kernel_uio.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/cpukit/include/machine/_kernel_uio.h b/cpukit/include/machine/_kernel_uio.h new file mode 100644 index 0000000000..c73fa6d299 --- /dev/null +++ b/cpukit/include/machine/_kernel_uio.h @@ -0,0 +1,87 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1982, 1986, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)uio.h 8.5 (Berkeley) 2/22/94 + * $FreeBSD: head/sys/sys/uio.h 331621 2018-03-27 15:20:03Z brooks $ + */ + +#if !defined(_SYS_UIO_H_) || !defined(_KERNEL) +#error "must be included via <sys/uio.h> in kernel space" +#endif + +struct uio { + struct iovec *uio_iov; /* scatter/gather list */ + int uio_iovcnt; /* length of scatter/gather list */ + off_t uio_offset; /* offset in target object */ + ssize_t uio_resid; /* remaining bytes to process */ + enum uio_seg uio_segflg; /* address space */ + enum uio_rw uio_rw; /* operation */ + struct thread *uio_td; /* owner */ +}; + +/* + * Limits + * + * N.B.: UIO_MAXIOV must be no less than IOV_MAX from <sys/syslimits.h> + * which in turn must be no less than _XOPEN_IOV_MAX from <limits.h>. If + * we ever make this tunable (probably pointless), then IOV_MAX should be + * removed from <sys/syslimits.h> and applications would be expected to use + * sysconf(3) to find out the correct value, or else assume the worst + * (_XOPEN_IOV_MAX). Perhaps UIO_MAXIOV should be simply defined as + * IOV_MAX. + */ +#define UIO_MAXIOV 1024 /* max 1K of iov's */ + +struct vm_object; +struct vm_page; +struct bus_dma_segment; + +struct uio *cloneuio(struct uio *uiop); +int copyinfrom(const void * __restrict src, void * __restrict dst, + size_t len, int seg); +int copyiniov(const struct iovec *iovp, u_int iovcnt, struct iovec **iov, + int error); +int copyinstrfrom(const void * __restrict src, void * __restrict dst, + size_t len, size_t * __restrict copied, int seg); +int copyinuio(const struct iovec *iovp, u_int iovcnt, struct uio **uiop); +int copyout_map(struct thread *td, vm_offset_t *addr, size_t sz); +int copyout_unmap(struct thread *td, vm_offset_t addr, size_t sz); +int physcopyin(void *src, vm_paddr_t dst, size_t len); +int physcopyout(vm_paddr_t src, void *dst, size_t len); +int physcopyin_vlist(struct bus_dma_segment *src, off_t offset, + vm_paddr_t dst, size_t len); +int physcopyout_vlist(vm_paddr_t src, struct bus_dma_segment *dst, + off_t offset, size_t len); +int uiomove(void *cp, int n, struct uio *uio); +int uiomove_frombuf(void *buf, int buflen, struct uio *uio); +int uiomove_fromphys(struct vm_page *ma[], vm_offset_t offset, int n, + struct uio *uio); +int uiomove_nofault(void *cp, int n, struct uio *uio); +int uiomove_object(struct vm_object *obj, off_t obj_size, struct uio *uio); |