diff options
| author | Chris Packham | 2018-11-26 21:00:28 +1300 |
|---|---|---|
| committer | Joe Hershberger | 2019-01-24 11:35:29 -0600 |
| commit | 1a4af5c562fdb9f5a884a53f136f2b2075ffd1d8 (patch) | |
| tree | 930fb7f2c560b83bfc5a78b5f10a2eb2143570c1 /drivers/net | |
| parent | e57c9fdb042741e4049661074c25e7b7ff8a68cc (diff) | |
net: move ether_crc to tsec driver
ether_crc was added to the core net code in commit 53a5c424bf86
("multicast tftp: RFC2090") so that other drivers could use it. However
the only current user of it is tsec.c so move it there.
Signed-off-by: Chris Packham <judge.packham@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/tsec.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c index 03a46da2f8a..9a4fab85e92 100644 --- a/drivers/net/tsec.c +++ b/drivers/net/tsec.c @@ -80,6 +80,31 @@ static void tsec_configure_serdes(struct tsec_private *priv) #ifdef CONFIG_MCAST_TFTP +/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c + * and this is the ethernet-crc method needed for TSEC -- and perhaps + * some other adapter -- hash tables + */ +#define CRCPOLY_LE 0xedb88320 +static u32 ether_crc(size_t len, unsigned char const *p) +{ + int i; + u32 crc; + + crc = ~0; + while (len--) { + crc ^= *p++; + for (i = 0; i < 8; i++) + crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); + } + /* an reverse the bits, cuz of way they arrive -- last-first */ + crc = (crc >> 16) | (crc << 16); + crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00); + crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0); + crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc); + crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa); + return crc; +} + /* CREDITS: linux gianfar driver, slightly adjusted... thanx. */ /* Set the appropriate hash bit for the given addr */ |