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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
commitf4cdf7ca9a1fdcca413157df19753f388a5a224e (patch)
tree60a31895b2446cd7fa27514e8c2843534a0de0da /lib/crc/gen_crc64table.c
downloadlinux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz
linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ...
Diffstat (limited to 'lib/crc/gen_crc64table.c')
-rw-r--r--lib/crc/gen_crc64table.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/lib/crc/gen_crc64table.c b/lib/crc/gen_crc64table.c
new file mode 100644
index 000000000..f2be9f62b
--- /dev/null
+++ b/lib/crc/gen_crc64table.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * This host program runs at kernel build time and generates the lookup tables
+ * used by the generic CRC64 code.
+ *
+ * Copyright 2018 SUSE Linux.
+ * Author: Coly Li <colyli@suse.de>
+ */
+#include <inttypes.h>
+#include <stdio.h>
+
+#define CRC64_ECMA182_POLY 0x42F0E1EBA9EA3693ULL
+#define CRC64_NVME_POLY 0x9A6C9329AC4BC9B5ULL
+
+static uint64_t crc64_table[256] = {0};
+static uint64_t crc64_nvme_table[256] = {0};
+
+static void generate_reflected_crc64_table(uint64_t table[256], uint64_t poly)
+{
+ uint64_t i, j, c, crc;
+
+ for (i = 0; i < 256; i++) {
+ crc = 0ULL;
+ c = i;
+
+ for (j = 0; j < 8; j++) {
+ if ((crc ^ (c >> j)) & 1)
+ crc = (crc >> 1) ^ poly;
+ else
+ crc >>= 1;
+ }
+ table[i] = crc;
+ }
+}
+
+static void generate_crc64_table(uint64_t table[256], uint64_t poly)
+{
+ uint64_t i, j, c, crc;
+
+ for (i = 0; i < 256; i++) {
+ crc = 0;
+ c = i << 56;
+
+ for (j = 0; j < 8; j++) {
+ if ((crc ^ c) & 0x8000000000000000ULL)
+ crc = (crc << 1) ^ poly;
+ else
+ crc <<= 1;
+ c <<= 1;
+ }
+
+ table[i] = crc;
+ }
+}
+
+static void output_table(uint64_t table[256])
+{
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ printf("\t0x%016" PRIx64 "ULL", table[i]);
+ if (i & 0x1)
+ printf(",\n");
+ else
+ printf(", ");
+ }
+ printf("};\n");
+}
+
+static void print_crc64_tables(void)
+{
+ printf("/* this file is generated - do not edit */\n\n");
+ printf("#include <linux/types.h>\n");
+ printf("#include <linux/cache.h>\n\n");
+ printf("static const u64 ____cacheline_aligned crc64table[256] = {\n");
+ output_table(crc64_table);
+
+ printf("\nstatic const u64 ____cacheline_aligned crc64nvmetable[256] = {\n");
+ output_table(crc64_nvme_table);
+}
+
+int main(int argc, char *argv[])
+{
+ generate_crc64_table(crc64_table, CRC64_ECMA182_POLY);
+ generate_reflected_crc64_table(crc64_nvme_table, CRC64_NVME_POLY);
+ print_crc64_tables();
+ return 0;
+}