From 1d3100cf148de1afb7b2282dbc5941fdc4722949 Mon Sep 17 00:00:00 2001 From: Sergey Senozhatsky Date: Mon, 2 Sep 2024 19:55:59 +0900 Subject: zram: add 842 compression backend support Add s/w 842 compression support. Link: https://lkml.kernel.org/r/20240902105656.1383858-12-senozhatsky@chromium.org Signed-off-by: Sergey Senozhatsky Cc: Minchan Kim Cc: Nick Terrell Signed-off-by: Andrew Morton --- drivers/block/zram/Kconfig | 11 +++++++ drivers/block/zram/Makefile | 1 + drivers/block/zram/backend_842.c | 68 ++++++++++++++++++++++++++++++++++++++++ drivers/block/zram/backend_842.h | 10 ++++++ drivers/block/zram/zcomp.c | 4 +++ 5 files changed, 94 insertions(+) create mode 100644 drivers/block/zram/backend_842.c create mode 100644 drivers/block/zram/backend_842.h (limited to 'drivers/block') diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig index 9dedd2edfb28..1e0e7e5910b8 100644 --- a/drivers/block/zram/Kconfig +++ b/drivers/block/zram/Kconfig @@ -44,6 +44,12 @@ config ZRAM_BACKEND_DEFLATE select ZLIB_DEFLATE select ZLIB_INFLATE +config ZRAM_BACKEND_842 + bool "842 compression support" + depends on ZRAM + select 842_COMPRESS + select 842_DECOMPRESS + choice prompt "Default zram compressor" default ZRAM_DEF_COMP_LZORLE @@ -73,6 +79,10 @@ config ZRAM_DEF_COMP_DEFLATE bool "deflate" depends on ZRAM_BACKEND_DEFLATE +config ZRAM_DEF_COMP_842 + bool "842" + depends on ZRAM_BACKEND_842 + endchoice config ZRAM_DEF_COMP @@ -83,6 +93,7 @@ config ZRAM_DEF_COMP default "lz4hc" if ZRAM_DEF_COMP_LZ4HC default "zstd" if ZRAM_DEF_COMP_ZSTD default "deflate" if ZRAM_DEF_COMP_DEFLATE + default "842" if ZRAM_DEF_COMP_842 default "unset-value" config ZRAM_WRITEBACK diff --git a/drivers/block/zram/Makefile b/drivers/block/zram/Makefile index 266430548437..0fdefd576691 100644 --- a/drivers/block/zram/Makefile +++ b/drivers/block/zram/Makefile @@ -7,5 +7,6 @@ zram-$(CONFIG_ZRAM_BACKEND_LZ4) += backend_lz4.o zram-$(CONFIG_ZRAM_BACKEND_LZ4HC) += backend_lz4hc.o zram-$(CONFIG_ZRAM_BACKEND_ZSTD) += backend_zstd.o zram-$(CONFIG_ZRAM_BACKEND_DEFLATE) += backend_deflate.o +zram-$(CONFIG_ZRAM_BACKEND_842) += backend_842.o obj-$(CONFIG_ZRAM) += zram.o diff --git a/drivers/block/zram/backend_842.c b/drivers/block/zram/backend_842.c new file mode 100644 index 000000000000..005f3fcb9024 --- /dev/null +++ b/drivers/block/zram/backend_842.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include +#include +#include +#include + +#include "backend_842.h" + +struct sw842_ctx { + void *mem; +}; + +static void destroy_842(void *ctx) +{ + struct sw842_ctx *zctx = ctx; + + kfree(zctx->mem); + kfree(zctx); +} + +static void *create_842(void) +{ + struct sw842_ctx *ctx; + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return NULL; + + ctx->mem = kmalloc(SW842_MEM_COMPRESS, GFP_KERNEL); + if (!ctx->mem) + goto error; + + return ctx; + +error: + destroy_842(ctx); + return NULL; +} + +static int compress_842(void *ctx, const unsigned char *src, size_t src_len, + unsigned char *dst, size_t *dst_len) +{ + struct sw842_ctx *zctx = ctx; + unsigned int dlen = *dst_len; + int ret; + + ret = sw842_compress(src, src_len, dst, &dlen, zctx->mem); + if (ret == 0) + *dst_len = dlen; + return ret; +} + +static int decompress_842(void *ctx, const unsigned char *src, size_t src_len, + unsigned char *dst, size_t dst_len) +{ + unsigned int dlen = dst_len; + + return sw842_decompress(src, src_len, dst, &dlen); +} + +const struct zcomp_ops backend_842 = { + .compress = compress_842, + .decompress = decompress_842, + .create_ctx = create_842, + .destroy_ctx = destroy_842, + .name = "842", +}; diff --git a/drivers/block/zram/backend_842.h b/drivers/block/zram/backend_842.h new file mode 100644 index 000000000000..4dc85c188799 --- /dev/null +++ b/drivers/block/zram/backend_842.h @@ -0,0 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#ifndef __BACKEND_842_H__ +#define __BACKEND_842_H__ + +#include "zcomp.h" + +extern const struct zcomp_ops backend_842; + +#endif /* __BACKEND_842_H__ */ diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c index d1396fe82b1d..94e1c9503267 100644 --- a/drivers/block/zram/zcomp.c +++ b/drivers/block/zram/zcomp.c @@ -18,6 +18,7 @@ #include "backend_lz4hc.h" #include "backend_zstd.h" #include "backend_deflate.h" +#include "backend_842.h" static const struct zcomp_ops *backends[] = { #if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZO) @@ -35,6 +36,9 @@ static const struct zcomp_ops *backends[] = { #endif #if IS_ENABLED(CONFIG_ZRAM_BACKEND_DEFLATE) &backend_deflate, +#endif +#if IS_ENABLED(CONFIG_ZRAM_BACKEND_842) + &backend_842, #endif NULL }; -- cgit v1.2.3