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2 * This file is provided under the GPLv2 license.
6 * Copyright(c) 2015 Intel Deutschland GmbH
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * The full GNU General Public License is included in this distribution
18 * in the file called COPYING.
20 #ifndef __DEVCOREDUMP_H
21 #define __DEVCOREDUMP_H
23 #include <linux/device.h>
24 #include <linux/module.h>
25 #include <linux/vmalloc.h>
27 #include <linux/scatterlist.h>
28 #include <linux/slab.h>
31 * _devcd_free_sgtable - free all the memory of the given scatterlist table
32 * (i.e. both pages and scatterlist instances)
33 * NOTE: if two tables allocated and chained using the sg_chain function then
34 * this function should be called only once on the first table
35 * @table: pointer to sg_table to free
37 static inline void _devcd_free_sgtable(struct scatterlist
*table
)
41 struct scatterlist
*iter
;
42 struct scatterlist
*delete_iter
;
46 for_each_sg(table
, iter
, sg_nents(table
), i
) {
52 /* then free all chained tables */
54 delete_iter
= table
; /* always points on a head of a table */
55 while (!sg_is_last(iter
)) {
57 if (sg_is_chain(iter
)) {
58 iter
= sg_chain_ptr(iter
);
64 /* free the last table */
69 #ifdef CONFIG_DEV_COREDUMP
70 void dev_coredumpv(struct device
*dev
, void *data
, size_t datalen
,
73 void dev_coredumpm(struct device
*dev
, struct module
*owner
,
74 void *data
, size_t datalen
, gfp_t gfp
,
75 ssize_t (*read
)(char *buffer
, loff_t offset
, size_t count
,
76 void *data
, size_t datalen
),
77 void (*free
)(void *data
));
79 void dev_coredumpsg(struct device
*dev
, struct scatterlist
*table
,
80 size_t datalen
, gfp_t gfp
);
82 static inline void dev_coredumpv(struct device
*dev
, void *data
,
83 size_t datalen
, gfp_t gfp
)
89 dev_coredumpm(struct device
*dev
, struct module
*owner
,
90 void *data
, size_t datalen
, gfp_t gfp
,
91 ssize_t (*read
)(char *buffer
, loff_t offset
, size_t count
,
92 void *data
, size_t datalen
),
93 void (*free
)(void *data
))
98 static inline void dev_coredumpsg(struct device
*dev
, struct scatterlist
*table
,
99 size_t datalen
, gfp_t gfp
)
101 _devcd_free_sgtable(table
);
103 #endif /* CONFIG_DEV_COREDUMP */
105 #endif /* __DEVCOREDUMP_H */