{"id":809314,"url":"http://patchwork.ozlabs.org/api/1.0/patches/809314/?format=json","project":{"id":18,"url":"http://patchwork.ozlabs.org/api/1.0/projects/18/?format=json","name":"U-Boot","link_name":"uboot","list_id":"u-boot.lists.denx.de","list_email":"u-boot@lists.denx.de","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<20170903150031.18179-2-marek.behun@nic.cz>","date":"2017-09-03T15:00:23","name":"[U-Boot,1/9] lib: Add CRC32-C","commit_ref":"85d8bf57131a21424b50e50884372e813345f09a","pull_url":null,"state":"accepted","archived":false,"hash":"0e7d94f69b5dd6e1bffe983ab755922d4e616dc9","submitter":{"id":71605,"url":"http://patchwork.ozlabs.org/api/1.0/people/71605/?format=json","name":"Marek Behún","email":"marek.behun@nic.cz"},"delegate":{"id":3651,"url":"http://patchwork.ozlabs.org/api/1.0/users/3651/?format=json","username":"trini","first_name":"Tom","last_name":"Rini","email":"trini@ti.com"},"mbox":"http://patchwork.ozlabs.org/project/uboot/patch/20170903150031.18179-2-marek.behun@nic.cz/mbox/","series":[{"id":1246,"url":"http://patchwork.ozlabs.org/api/1.0/series/1246/?format=json","date":"2017-09-03T15:00:25","name":"Add single-device read-only BTRFS support","version":1,"mbox":"http://patchwork.ozlabs.org/series/1246/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/809314/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.denx.de\n\t(client-ip=81.169.180.215; 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charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" "},"content":"This is needed for BTRFS.\n\nSigned-off-by: Marek Behun \n\n create mode 100644 lib/crc32c.c","diff":"diff --git a/include/u-boot/crc.h b/include/u-boot/crc.h\nindex 6764d58bab..6d08f5df98 100644\n--- a/include/u-boot/crc.h\n+++ b/include/u-boot/crc.h\n@@ -28,4 +28,8 @@ uint32_t crc32_no_comp (uint32_t, const unsigned char *, uint);\n void crc32_wd_buf(const unsigned char *input, uint ilen,\n \t\t unsigned char *output, uint chunk_sz);\n \n+/* lib/crc32c.c */\n+void crc32c_init(uint32_t *, uint32_t);\n+uint32_t crc32c_cal(uint32_t, const char *, int, uint32_t *);\n+\n #endif /* _UBOOT_CRC_H */\ndiff --git a/lib/Kconfig b/lib/Kconfig\nindex fe337acaeb..29e55dbe1d 100644\n--- a/lib/Kconfig\n+++ b/lib/Kconfig\n@@ -146,6 +146,9 @@ config SHA_PROG_HW_ACCEL\n config MD5\n \tbool\n \n+config CRC32C\n+\tbool\n+\n endmenu\n \n menu \"Compression Support\"\ndiff --git a/lib/Makefile b/lib/Makefile\nindex 2eef1eb80e..a58ce0f815 100644\n--- a/lib/Makefile\n+++ b/lib/Makefile\n@@ -67,6 +67,7 @@ obj-y += display_options.o\n CFLAGS_display_options.o := $(if $(BUILD_TAG),-DBUILD_TAG='\"$(BUILD_TAG)\"')\n obj-$(CONFIG_BCH) += bch.o\n obj-y += crc32.o\n+obj-$(CONFIG_CRC32C) += crc32c.o\n obj-y += ctype.o\n obj-y += div64.o\n obj-y += hang.o\ndiff --git a/lib/crc32c.c b/lib/crc32c.c\nnew file mode 100644\nindex 0000000000..322c08ff5d\n--- /dev/null\n+++ b/lib/crc32c.c\n@@ -0,0 +1,38 @@\n+/*\n+ * Copied from Linux kernel crypto/crc32c.c\n+ * Copyright (c) 2004 Cisco Systems, Inc.\n+ * Copyright (c) 2008 Herbert Xu \n+ *\n+ * This program is free software; you can redistribute it and/or modify it\n+ * under the terms of the GNU General Public License as published by the Free\n+ * Software Foundation; either version 2 of the License, or (at your option)\n+ * any later version.\n+ * SPDX-License-Identifier:\tGPL-2.0+\n+ */\n+\n+#include \n+#include \n+\n+uint32_t crc32c_cal(uint32_t crc, const char *data, int length,\n+\t\t uint32_t *crc32c_table)\n+{\n+\twhile (length--)\n+\t\tcrc = crc32c_table[(u8)(crc ^ *data++)] ^ (crc >> 8);\n+\n+\treturn crc;\n+}\n+\n+void crc32c_init(uint32_t *crc32c_table, uint32_t pol)\n+{\n+\tint i, j;\n+\tuint32_t v;\n+\tconst uint32_t poly = pol; /* Bit-reflected CRC32C polynomial */\n+\n+\tfor (i = 0; i < 256; i++) {\n+\t\tv = i;\n+\t\tfor (j = 0; j < 8; j++)\n+\t\t\tv = (v >> 1) ^ ((v & 1) ? poly : 0);\n+\n+\t\tcrc32c_table[i] = v;\n+\t}\n+}\n","prefixes":["U-Boot","1/9"]}