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b8f03cb703
Immutable params never change once comp has been allocated and setup, so we don't need to store multiple copies of them in each per-CPU backend context. Move those to per-comp zcomp_params and pass it to backends callbacks for requests execution. Basically, this means parameters sharing between different contexts. Also introduce two new backends callbacks: setup_params() and release_params(). First, we need to validate params in a driver-specific way; second, driver may want to allocate its specific representation of the params which is needed to execute requests. Link: https://lkml.kernel.org/r/20240902105656.1383858-20-senozhatsky@chromium.org Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Nick Terrell <terrelln@fb.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/lzo.h>
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#include "backend_lzo.h"
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static void lzo_release_params(struct zcomp_params *params)
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{
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}
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static int lzo_setup_params(struct zcomp_params *params)
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{
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return 0;
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}
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static int lzo_create(struct zcomp_params *params, struct zcomp_ctx *ctx)
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{
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ctx->context = kzalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
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if (!ctx->context)
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return -ENOMEM;
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return 0;
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}
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static void lzo_destroy(struct zcomp_ctx *ctx)
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{
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kfree(ctx->context);
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}
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static int lzo_compress(struct zcomp_params *params, struct zcomp_ctx *ctx,
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struct zcomp_req *req)
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{
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int ret;
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ret = lzo1x_1_compress(req->src, req->src_len, req->dst,
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&req->dst_len, ctx->context);
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return ret == LZO_E_OK ? 0 : ret;
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}
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static int lzo_decompress(struct zcomp_params *params, struct zcomp_ctx *ctx,
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struct zcomp_req *req)
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{
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int ret;
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ret = lzo1x_decompress_safe(req->src, req->src_len,
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req->dst, &req->dst_len);
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return ret == LZO_E_OK ? 0 : ret;
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}
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const struct zcomp_ops backend_lzo = {
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.compress = lzo_compress,
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.decompress = lzo_decompress,
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.create_ctx = lzo_create,
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.destroy_ctx = lzo_destroy,
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.setup_params = lzo_setup_params,
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.release_params = lzo_release_params,
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.name = "lzo",
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};
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