backend_842.c

 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};