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Mon, 06 May 2024 00:59:04 -0700 (PDT) Received: from tigerii.tok.corp.google.com ([2401:fa00:8f:203:4e24:10c3:4b65:e126]) by smtp.gmail.com with ESMTPSA id h6-20020a170902f54600b001ec64b128dasm7633772plf.129.2024.05.06.00.59.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 May 2024 00:59:04 -0700 (PDT) From: Sergey Senozhatsky To: Andrew Morton , Minchan Kim Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, Sergey Senozhatsky Subject: [PATCHv2 08/17] zram: add 842 compression backend support Date: Mon, 6 May 2024 16:58:21 +0900 Message-ID: <20240506075834.302472-9-senozhatsky@chromium.org> X-Mailer: git-send-email 2.45.0.rc1.225.g2a3ae87e7f-goog In-Reply-To: <20240506075834.302472-1-senozhatsky@chromium.org> References: <20240506075834.302472-1-senozhatsky@chromium.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 =20 +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 =20 +config ZRAM_DEF_COMP_842 + bool "842" + depends on ZRAM_BACKEND_842 + endchoice =20 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" =20 config ZRAM_WRITEBACK diff --git a/drivers/block/zram/Makefile b/drivers/block/zram/Makefile index 91c07595d8b4..029827a6ddac 100644 --- a/drivers/block/zram/Makefile +++ b/drivers/block/zram/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_ZRAM_BACKEND_LZ4) +=3D backend_lz4.o obj-$(CONFIG_ZRAM_BACKEND_LZ4HC) +=3D backend_lz4hc.o obj-$(CONFIG_ZRAM_BACKEND_ZSTD) +=3D backend_zstd.o obj-$(CONFIG_ZRAM_BACKEND_DEFLATE) +=3D backend_deflate.o +obj-$(CONFIG_ZRAM_BACKEND_842) +=3D backend_842.o =20 zram-y :=3D zcomp.o zram_drv.o =20 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 =3D ctx; + + kfree(zctx->mem); + kfree(zctx); +} + +static void *create_842(void) +{ + struct sw842_ctx *ctx; + + ctx =3D kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return NULL; + + ctx->mem =3D 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 =3D ctx; + unsigned int dlen =3D *dst_len; + int ret; + + ret =3D sw842_compress(src, PAGE_SIZE, dst, &dlen, zctx->mem); + if (ret =3D=3D 0) + *dst_len =3D dlen; + return ret; +} + +static int decompress_842(void *ctx, const unsigned char *src, size_t src_= len, + unsigned char *dst) +{ + unsigned int dlen =3D PAGE_SIZE; + + return sw842_decompress(src, src_len, dst, &dlen); +} + +struct zcomp_backend backend_842 =3D { + .compress =3D compress_842, + .decompress =3D decompress_842, + .create_ctx =3D create_842, + .destroy_ctx =3D destroy_842, + .name =3D "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" =20 static struct zcomp_backend *backends[] =3D { #if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZO) @@ -38,6 +39,9 @@ static struct zcomp_backend *backends[] =3D { #endif #if IS_ENABLED(CONFIG_ZRAM_BACKEND_DEFLATE) &backend_deflate, +#endif +#if IS_ENABLED(CONFIG_ZRAM_BACKEND_842) + &backend_842, #endif NULL }; --=20 2.45.0.rc1.225.g2a3ae87e7f-goog