1 /**************************************************************************
2  *
3  * Copyright (C) 2014 Red Hat Inc.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be included
13  * in all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21  * OTHER DEALINGS IN THE SOFTWARE.
22  *
23  **************************************************************************/
24 #ifndef VREND_IOV_H
25 #define VREND_IOV_H
26 
27 #include <stdint.h>
28 #include <stdbool.h>
29 #include "config.h"
30 
31 #ifdef HAVE_SYS_UIO_H
32 #include <sys/uio.h>
33 #else
34 struct iovec {
35     void *iov_base;
36     size_t iov_len;
37 };
38 #endif
39 
40 struct vrend_transfer_info {
41    int level;
42    uint32_t stride;
43    uint32_t layer_stride;
44    unsigned int iovec_cnt;
45    const struct iovec *iovec;
46    uint64_t offset;
47    struct pipe_box *box;
48    bool synchronized;
49 };
50 
51 typedef void (*iov_cb)(void *cookie, unsigned int doff, void *src, int len);
52 
53 size_t vrend_get_iovec_size(const struct iovec *iov, int iovlen);
54 size_t vrend_read_from_iovec(const struct iovec *iov, int iov_cnt,
55                              size_t offset, char *buf, size_t bytes);
56 size_t vrend_write_to_iovec(const struct iovec *iov, int iov_cnt,
57                             size_t offset, const char *buf, size_t bytes);
58 
59 size_t vrend_read_from_iovec_cb(const struct iovec *iov, int iov_cnt,
60                           size_t offset, size_t bytes, iov_cb iocb, void *cookie);
61 
62 int vrend_copy_iovec(const struct iovec *src_iov, int src_iovlen, size_t src_offset,
63                      const struct iovec *dst_iov, int dst_iovlen, size_t dst_offset,
64                      size_t count, char *buf);
65 
66 #endif
67