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/linux/Documentation/staging/
H A Dcrc32.rst2 Brief tutorial on CRC computation
5 A CRC is a long-division remainder. You add the CRC to the message,
6 and the whole thing (message+CRC) is a multiple of the given
7 CRC polynomial. To check the CRC, you can either check that the
8 CRC matches the recomputed value, *or* you can check that the
9 remainder computed on the message+CRC is 0. This latter approach
11 protocols put the end-of-frame flag after the CRC.
21 To produce a 32-bit CRC, th
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/linux/lib/crc/
H A DKconfig3 # Kconfig for the kernel's cyclic redundancy check (CRC) library code
32 The CRC-CCITT library functions. Select this if your module uses any
38 The CRC-ITU-T library functions. Select this if your module uses
44 The CRC-T10DIF library functions. Select this if your module uses
89 bool "Enable optimized CRC implementations" if EXPERT
94 architecture-optimized implementations of any CRC variants that are
95 enabled. CRC checksumming performance may get much slower.
101 tristate "KUnit tests for CRC functions" if !KUNIT_ALL_TESTS
110 Unit tests for the CRC library functions.
116 bool "Benchmark for the CRC function
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/linux/Documentation/driver-api/soundwire/
H A Dbra_cadence.rst19 (5) Padding shall be inserted as needed so that the Header CRC,
20 Header response, Footer CRC, Footer response are always in
36 + | | | pad | WR HDR CRC |
41 + 0 | 1 | | pad | WR Data CRC |
46 + 0 | 1 | | pad | RD HDR CRC |
64 + | | | pad | RD Data CRC |
H A Dbra.rst84 (1) A CRC on the 7-byte header. This CRC helps the Peripheral Device
88 (2) A CRC on the data block (header excluded). This CRC is
99 (2) Nak (CRC failure)
117 + C | HEADER CRC |
128 + | DATA CRC |
211 computation of CRC and handling of responses is handled in helpers and
/linux/lib/crc/x86/
H A Dcrc32c-3way.S49 ## ISCSI CRC 32 Implementation with crc32 and pclmulqdq Instruction
52 # regular CRC code that does not interleave the CRC instructions.
115 ## 3) CRC each of three lanes:
171 movq crc0_q, %xmm1 # CRC for block 1
174 movq crc1, %xmm2 # CRC for block 2
H A Dcrc-pclmul-template.S3 // Template to generate [V]PCLMULQDQ-based CRC functions for x86
88 // Load \vl bytes from the unaligned mem operand \src into \dst, and if the CRC
134 // unaligned mem operand if using VEX is allowed and the CRC is lsb-first so no
152 // byte-reflection table if the CRC is msb-first, and \tmp1 and \tmp2 are
183 // This macro generates the body of a CRC function with the following prototype:
187 // |crc| is the initial CRC, and crc_t is a data type wide enough to hold it.
190 // field of the constants struct that was generated for the chosen CRC variant.
192 // Moving onto the macro parameters, \n is the number of bits in the CRC, e.g.
193 // 32 for a CRC-32. Currently the supported values are 8, 16, 32, and 64. If
196 // \lsb_crc is 1 if the CRC processe
242 .set CRC, %edi global() define
244 .set CRC, %rdi global() define
254 .set CRC, %eax global() define
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/linux/drivers/soc/samsung/
H A DKconfig53 bool "S3C2410 PM Suspend Memory CRC"
66 int "S3C2410 PM Suspend CRC Chunksize (KiB)"
70 Set the chunksize in Kilobytes of the CRC for checking memory
72 the CRC data block will take more memory, but will identify any
/linux/drivers/net/ethernet/amd/
H A Dnmclan_cs.c1287 static void updateCRC(int *CRC, int bit) in updateCRC() argument
1294 }; /* CRC polynomial. poly[n] = coefficient of the x**n term of the in updateCRC()
1295 CRC generator polynomial. */ in updateCRC()
1299 /* shift CRC and control bit (CRC[32]) */ in updateCRC()
1301 CRC[j] = CRC[j-1]; in updateCRC()
1302 CRC[0] = 0; in updateCRC()
1304 /* If bit XOR(control bit) = 1, set CRC = CRC XO in updateCRC()
1321 int CRC[33]={1}; /* CRC register, 1 word/bit + extra control bit */ BuildLAF() local
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/linux/Documentation/translations/zh_CN/core-api/
H A Dkernel-api.rst134 *译注：CRC，Cyclic Redundancy Check，循环冗余校验*
/linux/Documentation/w1/slaves/
H A Dw1_ds28e04.rst20 Support is provided through the sysfs files "eeprom" and "pio". CRC checking
31 to the EEPROM of the DS28E04. If CRC checking mode is enabled only
H A Dw1_ds2438.rst43 Internally when this file is read, the additional CRC byte is also obtained
51 Internally when this file is read, the additional CRC byte is also obtained
/linux/Documentation/ABI/testing/
H A Dsysfs-driver-zynqmp-fpga12 BIT(0) 0: No CRC error
13 1: CRC error
H A Dsysfs-class-fpga-manager53 * reconfig CRC error - CRC error detected by
H A Dsysfs-devices-platform-kunpeng_hccs20 crc_err_cnt: (RO) total CRC err count for all ports on this
44 crc_err_cnt: (RO) total CRC err count for all ports on this
80 crc_err_cnt: (RO) CRC err count on this port.
H A Ddebugfs-dwc-pcie23 2) b16_crc_dllp - 16b CRC error injection of ACK/NAK DLLP
24 3) b16_crc_upd_fc - 16b CRC error injection of Update-FC DLLP
107 11) Margin CRC and Parity Error
/linux/Documentation/networking/device_drivers/ethernet/altera/
H A Daltera_tse.rst164 received. This count does not include any error packets such as CRC errors,
169 an integral number of bytes in length and do not pass the CRC test as the frame
174 integral number of bytes in length and do not pass the CRC test as the frame is
280 octets, and had either a bad CRC with an integral number of octets (CRC Error)
281 or a bad CRC with a non-integral number of octets (Alignment Error).
285 in length and had either a bad CRC with an integral number of octets (CRC
286 error) or a bad CRC with a non-integral number of octets (Alignment Error).
/linux/Documentation/driver-api/pldmfw/
H A Dfile-format.rst29 | Package Header CRC |
192 Package Header CRC
195 Following the component information is a short 4-byte CRC calculated over
/linux/Documentation/filesystems/xfs/
H A Dxfs-self-describing-metadata.rst87 hence a 32 bit CRC is more than sufficient to detect multi-bit errors in
176 whether CRC validating is necessary. If it is, the CRC32c is calculated and
184 modification made to the object, After this, we calculate the CRC and insert it
196 __be32 crc; /* CRC, not logged */
240 The code ensures that the CRC is only checked if the filesystem has CRCs enabled
241 by checking the superblock of the feature bit, and then if the CRC verifies OK
327 update the LSN field (when it was last modified) and calculate the CRC on the
333 Inodes and dquots are special snowflakes. They have per-object CRC and
336 verification and CRC calculations. The per-buffer verifiers simply perform basic
338 there are magic numbers in all the expected spots. All further CRC an
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/linux/Documentation/hwmon/
H A Dsht15.rst57 * If a CRC validation fails, a soft reset command is sent, which resets
65 set it to true to enable CRC validation of the readings (default to false).
/linux/drivers/char/xilinx_hwicap/
H A Dxilinx_hwicap.c118 .CRC = 0,
143 .CRC = 0,
168 .CRC = 0,
193 .CRC = 0,
/linux/drivers/net/wireless/marvell/libertas_tf/
H A Dif_usb.h76 __le32 CRC; member
/linux/Documentation/gpu/
H A Dvkms.rst114 - kms_plane: some test cases are failing due to timeout on capturing CRC;
168 - The writeback and CRC capture operations share the use of composer_enabled
189 CRC API Improvements
192 - Optimize CRC computation ``compute_crc()`` and plane blending ``blend()``
/linux/drivers/net/wireless/marvell/libertas/
H A Dif_usb.h86 __le32 CRC; member
/linux/lib/crc/arm/
H A Dcrc32-core.S2 * Accelerated CRC32(C) using ARM CRC, NEON and Crypto Extensions instructions
113 CRC .req r2
121 * CRC - initial crc32
139 vmov.32 dCONSTANTl[0], CRC
/linux/Documentation/kbuild/
H A Dmodules.rst392 as a simple ABI consistency check. A CRC value of the full prototype
394 CRC values contained in the kernel are compared with similar values in
407 corresponding CRC value is also stored.
411 <CRC> <Symbol> <Module> <Export Type> <Namespace>
418 For a kernel build without CONFIG_MODVERSIONS enabled, the CRC
424 2) It lists the CRC if CONFIG_MODVERSIONS is enabled.
437 CRC stored in the __versions section of the importing module. This

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