tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-or-later
2
3#include <linux/kernel.h>
4#include <linux/slab.h>
5#include <linux/sw842.h>
6#include <linux/vmalloc.h>
7
8#include "backend_842.h"
9
10static void release_params_842(struct zcomp_params *params)
11{
12}
13
14static int setup_params_842(struct zcomp_params *params)
15{
16 return 0;
17}
18
19static void destroy_842(struct zcomp_ctx *ctx)
20{
21 kfree(ctx->context);
22}
23
24static int create_842(struct zcomp_params *params, struct zcomp_ctx *ctx)
25{
26 ctx->context = kmalloc(SW842_MEM_COMPRESS, GFP_KERNEL);
27 if (!ctx->context)
28 return -ENOMEM;
29 return 0;
30}
31
32static int compress_842(struct zcomp_params *params, struct zcomp_ctx *ctx,
33 struct zcomp_req *req)
34{
35 unsigned int dlen = req->dst_len;
36 int ret;
37
38 ret = sw842_compress(req->src, req->src_len, req->dst, &dlen,
39 ctx->context);
40 if (ret == 0)
41 req->dst_len = dlen;
42 return ret;
43}
44
45static int decompress_842(struct zcomp_params *params, struct zcomp_ctx *ctx,
46 struct zcomp_req *req)
47{
48 unsigned int dlen = req->dst_len;
49
50 return sw842_decompress(req->src, req->src_len, req->dst, &dlen);
51}
52
53const struct zcomp_ops backend_842 = {
54 .compress = compress_842,
55 .decompress = decompress_842,
56 .create_ctx = create_842,
57 .destroy_ctx = destroy_842,
58 .setup_params = setup_params_842,
59 .release_params = release_params_842,
60 .name = "842",
61};