[PATCH] chelsio: use standard CRC routines
Replace driver crc calculation with existing library.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index ee391f2..9de0eed 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2360,6 +2360,7 @@
config CHELSIO_T1
tristate "Chelsio 10Gb Ethernet support"
depends on PCI
+ select CRC32
help
This driver supports Chelsio gigabit and 10-gigabit
Ethernet cards. More information about adapter features and
diff --git a/drivers/net/chelsio/pm3393.c b/drivers/net/chelsio/pm3393.c
index a1d15ee..63cabeb 100644
--- a/drivers/net/chelsio/pm3393.c
+++ b/drivers/net/chelsio/pm3393.c
@@ -43,6 +43,8 @@
#include "elmer0.h"
#include "suni1x10gexp_regs.h"
+#include <linux/crc32.h>
+
#define OFFSET(REG_ADDR) (REG_ADDR << 2)
/* Max frame size PM3393 can handle. Includes Ethernet header and CRC. */
@@ -345,33 +347,6 @@
return 0;
}
-static u32 calc_crc(u8 *b, int len)
-{
- int i;
- u32 crc = (u32)~0;
-
- /* calculate crc one bit at a time */
- while (len--) {
- crc ^= *b++;
- for (i = 0; i < 8; i++) {
- if (crc & 0x1)
- crc = (crc >> 1) ^ 0xedb88320;
- else
- crc = (crc >> 1);
- }
- }
-
- /* reverse bits */
- crc = ((crc >> 4) & 0x0f0f0f0f) | ((crc << 4) & 0xf0f0f0f0);
- crc = ((crc >> 2) & 0x33333333) | ((crc << 2) & 0xcccccccc);
- crc = ((crc >> 1) & 0x55555555) | ((crc << 1) & 0xaaaaaaaa);
- /* swap bytes */
- crc = (crc >> 16) | (crc << 16);
- crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
-
- return crc;
-}
-
static int pm3393_set_rx_mode(struct cmac *cmac, struct t1_rx_mode *rm)
{
int enabled = cmac->instance->enabled & MAC_DIRECTION_RX;
@@ -405,7 +380,7 @@
u16 mc_filter[4] = { 0, };
while ((addr = t1_get_next_mcaddr(rm))) {
- bit = (calc_crc(addr, ETH_ALEN) >> 23) & 0x3f; /* bit[23:28] */
+ bit = (ether_crc(ETH_ALEN, addr) >> 23) & 0x3f; /* bit[23:28] */
mc_filter[bit >> 4] |= 1 << (bit & 0xf);
}
pmwrite(cmac, SUNI1x10GEXP_REG_RXXG_MULTICAST_HASH_LOW, mc_filter[0]);