ia64/linux-2.6.18-xen.hg

view lib/crc32defs.h @ 847:ad4d307bf9ce

net sfc: Update sfc and sfc_resource driver to latest release

...and update sfc_netfront, sfc_netback, sfc_netutil for any API changes

sfc_netback: Fix asymmetric use of SFC buffer table alloc and free
sfc_netback: Clean up if no SFC accel device found
sfc_netback: Gracefully handle case where page grant fails
sfc_netback: Disable net acceleration if the physical link goes down
sfc_netfront: Less verbose error messages, more verbose counters for
rx discard errors
sfc_netfront: Gracefully handle case where SFC netfront fails during
initialisation

Signed-off-by: Kieran Mansley <kmansley@solarflare.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Mar 31 11:59:10 2009 +0100 (2009-03-31)
parents 831230e53067
children
line source
1 /*
2 * There are multiple 16-bit CRC polynomials in common use, but this is
3 * *the* standard CRC-32 polynomial, first popularized by Ethernet.
4 * x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x^1+x^0
5 */
6 #define CRCPOLY_LE 0xedb88320
7 #define CRCPOLY_BE 0x04c11db7
9 /* How many bits at a time to use. Requires a table of 4<<CRC_xx_BITS bytes. */
10 /* For less performance-sensitive, use 4 */
11 #ifndef CRC_LE_BITS
12 # define CRC_LE_BITS 8
13 #endif
14 #ifndef CRC_BE_BITS
15 # define CRC_BE_BITS 8
16 #endif
18 /*
19 * Little-endian CRC computation. Used with serial bit streams sent
20 * lsbit-first. Be sure to use cpu_to_le32() to append the computed CRC.
21 */
22 #if CRC_LE_BITS > 8 || CRC_LE_BITS < 1 || CRC_LE_BITS & CRC_LE_BITS-1
23 # error CRC_LE_BITS must be a power of 2 between 1 and 8
24 #endif
26 /*
27 * Big-endian CRC computation. Used with serial bit streams sent
28 * msbit-first. Be sure to use cpu_to_be32() to append the computed CRC.
29 */
30 #if CRC_BE_BITS > 8 || CRC_BE_BITS < 1 || CRC_BE_BITS & CRC_BE_BITS-1
31 # error CRC_BE_BITS must be a power of 2 between 1 and 8
32 #endif