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
release_params_842(struct zcomp_params * params)10 static void release_params_842(struct zcomp_params *params)
11 {
12 }
13
setup_params_842(struct zcomp_params * params)14 static int setup_params_842(struct zcomp_params *params)
15 {
16 return 0;
17 }
18
destroy_842(struct zcomp_ctx * ctx)19 static void destroy_842(struct zcomp_ctx *ctx)
20 {
21 kfree(ctx->context);
22 }
23
create_842(struct zcomp_params * params,struct zcomp_ctx * ctx)24 static 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
compress_842(struct zcomp_params * params,struct zcomp_ctx * ctx,struct zcomp_req * req)32 static 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
decompress_842(struct zcomp_params * params,struct zcomp_ctx * ctx,struct zcomp_req * req)45 static 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
53 const 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 };
62