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net: move compute_mcast_idx() to net.h 

Reduce duplicated codes.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2012-03-05 11:08:50 +08:00 committed by Michael S. Tsirkin
parent afe0a59535
commit 7fc8d918b9
6 changed files with 26 additions and 98 deletions
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25
hw/eepro100.c
View File

@ -322,33 +322,8 @@ static const uint16_t eepro100_mdi_mask[] = {
0xffff, 0xffff, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
};
#define POLYNOMIAL 0x04c11db6
static E100PCIDeviceInfo *eepro100_get_class(EEPRO100State *s);
/* From FreeBSD */
/* XXX: optimize */
static unsigned compute_mcast_idx(const uint8_t * ep)
{
uint32_t crc;
int carry, i, j;
uint8_t b;
crc = 0xffffffff;
for (i = 0; i < 6; i++) {
b = *ep++;
for (j = 0; j < 8; j++) {
carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
crc <<= 1;
b >>= 1;
if (carry) {
crc = ((crc ^ POLYNOMIAL) | carry);
}
}
}
return (crc & BITS(7, 2)) >> 2;
}
/* Read a 16 bit control/status (CSR) register. */
static uint16_t e100_read_reg2(EEPRO100State *s, E100RegisterOffset addr)
{

24
hw/ne2000.c
View File

@ -150,30 +150,6 @@ static void ne2000_update_irq(NE2000State *s)
qemu_set_irq(s->irq, (isr != 0));
}
#define POLYNOMIAL 0x04c11db6
/* From FreeBSD */
/* XXX: optimize */
static int compute_mcast_idx(const uint8_t *ep)
{
uint32_t crc;
int carry, i, j;
uint8_t b;
crc = 0xffffffff;
for (i = 0; i < 6; i++) {
b = *ep++;
for (j = 0; j < 8; j++) {
carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
crc <<= 1;
b >>= 1;
if (carry)
crc = ((crc ^ POLYNOMIAL) | carry);
}
}
return (crc >> 26);
}
static int ne2000_buffer_full(NE2000State *s)
{
int avail, index, boundary;

25
hw/opencores_eth.c
View File

@ -351,31 +351,6 @@ static int open_eth_can_receive(VLANClientState *nc)
(rx_desc(s)->len_flags & RXD_E);
}
#define POLYNOMIAL 0x04c11db6
/* From FreeBSD */
/* XXX: optimize */
static unsigned compute_mcast_idx(const uint8_t *ep)
{
uint32_t crc;
int carry, i, j;
uint8_t b;
crc = 0xffffffff;
for (i = 0; i < 6; i++) {
b = *ep++;
for (j = 0; j < 8; j++) {
carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
crc <<= 1;
b >>= 1;
if (carry) {
crc = ((crc ^ POLYNOMIAL) | carry);
}
}
}
return crc >> 26;
}
static ssize_t open_eth_receive(VLANClientState *nc,
const uint8_t *buf, size_t size)
{

24
hw/rtl8139.c
View File

@ -708,30 +708,6 @@ static void rtl8139_update_irq(RTL8139State *s)
qemu_set_irq(s->dev.irq[0], (isr != 0));
}
#define POLYNOMIAL 0x04c11db6
/* From FreeBSD */
/* XXX: optimize */
static int compute_mcast_idx(const uint8_t *ep)
{
uint32_t crc;
int carry, i, j;
uint8_t b;
crc = 0xffffffff;
for (i = 0; i < 6; i++) {
b = *ep++;
for (j = 0; j < 8; j++) {
carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
crc <<= 1;
b >>= 1;
if (carry)
crc = ((crc ^ POLYNOMIAL) | carry);
}
}
return (crc >> 26);
}
static int rtl8139_RxWrap(RTL8139State *s)
{
/* wrapping enabled; assume 1.5k more buffer space if size < 65536 */

23
net.c
View File

@ -1475,3 +1475,26 @@ int net_client_parse(QemuOptsList *opts_list, const char *optarg)
default_net = 0;
return 0;
}
/* From FreeBSD */
/* XXX: optimize */
unsigned compute_mcast_idx(const uint8_t *ep)
{
uint32_t crc;
int carry, i, j;
uint8_t b;
crc = 0xffffffff;
for (i = 0; i < 6; i++) {
b = *ep++;
for (j = 0; j < 8; j++) {
carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
crc <<= 1;
b >>= 1;
if (carry) {
crc = ((crc ^ POLYNOMIAL) | carry);
}
}
}
return crc >> 26;
}

3
net.h
View File

@ -182,6 +182,9 @@ void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd);
int net_handle_fd_param(Monitor *mon, const char *param);
#define POLYNOMIAL 0x04c11db6
unsigned compute_mcast_idx(const uint8_t *ep);
#define vmstate_offset_macaddr(_state, _field) \
vmstate_offset_array(_state, _field.a, uint8_t, \
sizeof(typeof_field(_state, _field)))