1/*-
2 * Copyright (c) 2017 Chelsio Communications, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/types.h>
28#include <sys/param.h>
29
30#include "common/common.h"
31#include "cudbg.h"
32#include "cudbg_lib_common.h"
33
34int get_scratch_buff(struct cudbg_buffer *pdbg_buff, u32 size,
35		     struct cudbg_buffer *pscratch_buff)
36{
37	u32 scratch_offset;
38	int rc = 0;
39
40	scratch_offset = pdbg_buff->size - size;
41
42	if (pdbg_buff->offset > (int)scratch_offset || pdbg_buff->size < size) {
43		rc = CUDBG_STATUS_NO_SCRATCH_MEM;
44		goto err;
45	} else {
46		pscratch_buff->data = (char *)pdbg_buff->data + scratch_offset;
47		pscratch_buff->offset = 0;
48		pscratch_buff->size = size;
49		pdbg_buff->size -= size;
50	}
51
52err:
53	return rc;
54}
55
56void release_scratch_buff(struct cudbg_buffer *pscratch_buff,
57			  struct cudbg_buffer *pdbg_buff)
58{
59	pdbg_buff->size += pscratch_buff->size;
60	/* Reset the used buffer to zero.
61	 * If we dont do this, then it will effect the ext entity logic.
62	 */
63	memset(pscratch_buff->data, 0, pscratch_buff->size);
64	pscratch_buff->data = NULL;
65	pscratch_buff->offset = 0;
66	pscratch_buff->size = 0;
67}
68
69static inline void init_cudbg_hdr(struct cudbg_init_hdr *hdr)
70{
71	hdr->major_ver = CUDBG_MAJOR_VERSION;
72	hdr->minor_ver = CUDBG_MINOR_VERSION;
73	hdr->build_ver = CUDBG_BUILD_VERSION;
74	hdr->init_struct_size = sizeof(struct cudbg_init);
75}
76
77void *
78cudbg_alloc_handle(void)
79{
80	struct cudbg_private *handle;
81
82	handle = malloc(sizeof(*handle), M_CXGBE, M_ZERO | M_WAITOK);
83	init_cudbg_hdr(&handle->dbg_init.header);
84
85	return (handle);
86}
87
88void
89cudbg_free_handle(void *handle)
90{
91
92	free(handle, M_CXGBE);
93}
94