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Signed-off-by: Sergey Senozhatsky --- 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 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..8ea7a230b890 --- /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, + unsigned char *dst, size_t *dst_len) +{ + struct sw842_ctx *zctx = ctx; + unsigned int dlen = *dst_len; + int ret; + + ret = sw842_compress(src, PAGE_SIZE, 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) +{ + unsigned int dlen = PAGE_SIZE; + + return sw842_decompress(src, src_len, dst, &dlen); +} + +struct zcomp_backend 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..c03a2396d7b2 --- /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 struct zcomp_backend backend_842; + +#endif /* __BACKEND_842_H__ */ diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c index 9fc5477a6259..2a38126f4da3 100644 --- a/drivers/block/zram/zcomp.c +++ b/drivers/block/zram/zcomp.c @@ -21,6 +21,7 @@ #include "backend_lz4hc.h" #include "backend_zstd.h" #include "backend_deflate.h" +#include "backend_842.h" static struct zcomp_backend *backends[] = { #if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZO) @@ -38,6 +39,9 @@ static struct zcomp_backend *backends[] = { #endif #if IS_ENABLED(CONFIG_ZRAM_BACKEND_DEFLATE) &backend_deflate, +#endif +#if IS_ENABLED(CONFIG_ZRAM_BACKEND_842) + &backend_842, #endif NULL };