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Staging: sxg: Add multicast support for Sahara SXG driver
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* Add multicast support for SXG driver for Alacritech's 10Gbe products.

Signed-off-by: LinSysSoft Sahara Team <saharaproj@linsyssoft.com>
Signed-off-by: Mithlesh Thukral <mithlesh@linsyssoft.com>
Cc: Michael Miles <mmiles@alacritech.com>
Cc: Christopher Harrer <charrer@alacritech.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Mithlesh Thukral authored and Greg Kroah-Hartman committed Apr 3, 2009
1 parent 96e7088 commit b040b07
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Showing 2 changed files with 52 additions and 79 deletions.
127 changes: 50 additions & 77 deletions drivers/staging/sxg/sxg.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -119,10 +119,8 @@ static void sxg_complete_slow_send(struct adapter_t *adapter, int irq_context);
static struct sk_buff *sxg_slow_receive(struct adapter_t *adapter,
struct sxg_event *Event);
static void sxg_process_rcv_error(struct adapter_t *adapter, u32 ErrorStatus);
/* See if we need sxg_mac_filter() in future. If not remove it
static bool sxg_mac_filter(struct adapter_t *adapter,
struct ether_header *EtherHdr, ushort length);
*/
static struct net_device_stats *sxg_get_stats(struct net_device * dev);
void sxg_free_resources(struct adapter_t *adapter);
void sxg_free_rcvblocks(struct adapter_t *adapter);
Expand Down Expand Up @@ -155,6 +153,7 @@ static int sxg_write_mdio_reg(struct adapter_t *adapter,
u32 DevAddr, u32 RegAddr, u32 Value);
static int sxg_read_mdio_reg(struct adapter_t *adapter,
u32 DevAddr, u32 RegAddr, u32 *pValue);
static void sxg_set_mcast_addr(struct adapter_t *adapter);

static unsigned int sxg_first_init = 1;
static char *sxg_banner =
Expand Down Expand Up @@ -1609,16 +1608,14 @@ static struct sk_buff *sxg_slow_receive(struct adapter_t *adapter,
#endif
/* Dumb-nic frame. See if it passes our mac filter and update stats */

/*
* ASK if (!sxg_mac_filter(adapter,
* SXG_RECEIVE_DATA_LOCATION(RcvDataBufferHdr),
* Event->Length)) {
* SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "RcvFiltr",
* Event, SXG_RECEIVE_DATA_LOCATION(RcvDataBufferHdr),
* Event->Length, 0);
* goto drop;
* }
*/
if (!sxg_mac_filter(adapter,
(struct ether_header *)(SXG_RECEIVE_DATA_LOCATION(RcvDataBufferHdr)),
Event->Length)) {
SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "RcvFiltr",
Event, SXG_RECEIVE_DATA_LOCATION(RcvDataBufferHdr),
Event->Length, 0);
goto drop;
}

Packet = RcvDataBufferHdr->SxgDumbRcvPacket;
SXG_ADJUST_RCV_PACKET(Packet, RcvDataBufferHdr, Event);
Expand Down Expand Up @@ -1728,7 +1725,6 @@ static void sxg_process_rcv_error(struct adapter_t *adapter, u32 ErrorStatus)
}
}

#if 0 /* Find out if this code will be needed in future */
/*
* sxg_mac_filter
*
Expand All @@ -1743,44 +1739,37 @@ static bool sxg_mac_filter(struct adapter_t *adapter,
struct ether_header *EtherHdr, ushort length)
{
bool EqualAddr;
struct net_device *dev = adapter->netdev;

if (SXG_MULTICAST_PACKET(EtherHdr)) {
if (SXG_BROADCAST_PACKET(EtherHdr)) {
/* broadcast */
if (adapter->MacFilter & MAC_BCAST) {
adapter->Stats.DumbRcvBcastPkts++;
adapter->Stats.DumbRcvBcastBytes += length;
adapter->Stats.DumbRcvPkts++;
adapter->Stats.DumbRcvBytes += length;
return (TRUE);
}
} else {
/* multicast */
if (adapter->MacFilter & MAC_ALLMCAST) {
adapter->Stats.DumbRcvMcastPkts++;
adapter->Stats.DumbRcvMcastBytes += length;
adapter->Stats.DumbRcvPkts++;
adapter->Stats.DumbRcvBytes += length;
return (TRUE);
}
if (adapter->MacFilter & MAC_MCAST) {
struct sxg_multicast_address *MulticastAddrs =
adapter->MulticastAddrs;
while (MulticastAddrs) {
ETHER_EQ_ADDR(MulticastAddrs->Address,
struct dev_mc_list *mclist = dev->mc_list;
while (mclist) {
ETHER_EQ_ADDR(mclist->da_addr,
EtherHdr->ether_dhost,
EqualAddr);
if (EqualAddr) {
adapter->Stats.
DumbRcvMcastPkts++;
adapter->Stats.
DumbRcvMcastBytes += length;
adapter->Stats.DumbRcvPkts++;
adapter->Stats.DumbRcvBytes +=
length;
return (TRUE);
}
MulticastAddrs = MulticastAddrs->Next;
mclist = mclist->next;
}
}
}
Expand All @@ -1792,20 +1781,15 @@ static bool sxg_mac_filter(struct adapter_t *adapter,
*/
adapter->Stats.DumbRcvUcastPkts++;
adapter->Stats.DumbRcvUcastBytes += length;
adapter->Stats.DumbRcvPkts++;
adapter->Stats.DumbRcvBytes += length;
return (TRUE);
}
if (adapter->MacFilter & MAC_PROMISC) {
/* Whatever it is, keep it. */
adapter->Stats.DumbRcvPkts++;
adapter->Stats.DumbRcvBytes += length;
return (TRUE);
}
adapter->Stats.RcvDiscards++;
return (FALSE);
}
#endif

static int sxg_register_interrupt(struct adapter_t *adapter)
{
if (!adapter->intrregistered) {
Expand Down Expand Up @@ -1885,24 +1869,24 @@ static int sxg_if_init(struct adapter_t *adapter)
ASSERT(adapter->linkstate == LINK_DOWN);

adapter->devflags_prev = dev->flags;
adapter->macopts = MAC_DIRECTED;
adapter->MacFilter = MAC_DIRECTED;
if (dev->flags) {
DBG_ERROR("sxg: %s (%s) Set MAC options: ", __func__,
adapter->netdev->name);
if (dev->flags & IFF_BROADCAST) {
adapter->macopts |= MAC_BCAST;
adapter->MacFilter |= MAC_BCAST;
DBG_ERROR("BCAST ");
}
if (dev->flags & IFF_PROMISC) {
adapter->macopts |= MAC_PROMISC;
adapter->MacFilter |= MAC_PROMISC;
DBG_ERROR("PROMISC ");
}
if (dev->flags & IFF_ALLMULTI) {
adapter->macopts |= MAC_ALLMCAST;
adapter->MacFilter |= MAC_ALLMCAST;
DBG_ERROR("ALL_MCAST ");
}
if (dev->flags & IFF_MULTICAST) {
adapter->macopts |= MAC_MCAST;
adapter->MacFilter |= MAC_MCAST;
DBG_ERROR("MCAST ");
}
DBG_ERROR("\n");
Expand Down Expand Up @@ -3036,9 +3020,7 @@ static int sxg_read_mdio_reg(struct adapter_t *adapter,
* complemented), we must then transpose the value and return bits 30-23.
*/
static u32 sxg_crc_table[256];/* Table of CRC's for all possible byte values */
#if XXXTODO
static u32 sxg_crc_init; /* Is table initialized */
#endif

/* Contruct the CRC32 table */
static void sxg_mcast_init_crc32(void)
Expand All @@ -3063,7 +3045,6 @@ static void sxg_mcast_init_crc32(void)
}
}

#if XXXTODO
/*
* Return the MAC hast as described above.
*/
Expand Down Expand Up @@ -3091,13 +3072,12 @@ static unsigned char sxg_mcast_get_mac_hash(char *macaddr)

return (machash);
}
#endif

static void sxg_mcast_set_mask(struct adapter_t *adapter)
{
struct sxg_ucode_regs *sxg_regs = adapter->UcodeRegs;

DBG_ERROR("%s ENTER (%s) macopts[%x] mask[%llx]\n", __func__,
DBG_ERROR("%s ENTER (%s) MacFilter[%x] mask[%llx]\n", __FUNCTION__,
adapter->netdev->name, (unsigned int)adapter->MacFilter,
adapter->MulticastMask);

Expand All @@ -3107,7 +3087,7 @@ static void sxg_mcast_set_mask(struct adapter_t *adapter)
* promiscuous mode as well as ALLMCAST mode. It saves the
* Microcode from having keep state about the MAC configuration
*/
/* DBG_ERROR("sxg: %s macopts = MAC_ALLMCAST | MAC_PROMISC\n
/* DBG_ERROR("sxg: %s MacFilter = MAC_ALLMCAST | MAC_PROMISC\n \
* SLUT MODE!!!\n",__func__);
*/
WRITE_REG(sxg_regs->McastLow, 0xFFFFFFFF, FLUSH);
Expand Down Expand Up @@ -3135,39 +3115,6 @@ static void sxg_mcast_set_mask(struct adapter_t *adapter)
}
}

#if XXXTODO
/*
* Allocate a mcast_address structure to hold the multicast address.
* Link it in.
*/
static int sxg_mcast_add_list(struct adapter_t *adapter, char *address)
{
struct mcast_address *mcaddr, *mlist;
bool equaladdr;

/* Check to see if it already exists */
mlist = adapter->mcastaddrs;
while (mlist) {
ETHER_EQ_ADDR(mlist->address, address, equaladdr);
if (equaladdr) {
return (STATUS_SUCCESS);
}
mlist = mlist->next;
}

/* Doesn't already exist. Allocate a structure to hold it */
mcaddr = kmalloc(sizeof(struct mcast_address), GFP_ATOMIC);
if (mcaddr == NULL)
return 1;

memcpy(mcaddr->address, address, 6);

mcaddr->next = adapter->mcastaddrs;
adapter->mcastaddrs = mcaddr;

return (STATUS_SUCCESS);
}

static void sxg_mcast_set_bit(struct adapter_t *adapter, char *address)
{
unsigned char crcpoly;
Expand All @@ -3184,7 +3131,25 @@ static void sxg_mcast_set_bit(struct adapter_t *adapter, char *address)
/* OR in the new bit into our 64 bit mask. */
adapter->MulticastMask |= (u64) 1 << crcpoly;
}
#endif

/*
* Function takes MAC addresses from dev_mc_list and generates the Mask
*/

static void sxg_set_mcast_addr(struct adapter_t *adapter)
{
struct dev_mc_list *mclist;
struct net_device *dev = adapter->netdev;
int i;

if (adapter->MacFilter & (MAC_ALLMCAST | MAC_MCAST)) {
for (i = 0, mclist = dev->mc_list; i < dev->mc_count;
i++, mclist = mclist->next) {
sxg_mcast_set_bit(adapter,mclist->da_addr);
}
}
sxg_mcast_set_mask(adapter);
}

static void sxg_mcast_set_list(struct net_device *dev)
{
Expand All @@ -3194,8 +3159,16 @@ static void sxg_mcast_set_list(struct net_device *dev)
if (dev->flags & IFF_PROMISC) {
adapter->MacFilter |= MAC_PROMISC;
}

if (dev->flags & IFF_MULTICAST)
adapter->MacFilter |= MAC_MCAST;

if (dev->flags & IFF_ALLMULTI) {
adapter->MacFilter |= MAC_ALLMCAST;
}

//XXX handle other flags as well
sxg_mcast_set_mask(adapter);
sxg_set_mcast_addr(adapter);
}

#if XXXTODO
Expand Down
4 changes: 2 additions & 2 deletions drivers/staging/sxg/sxg_ethtool.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -99,9 +99,9 @@ static struct sxg_nic_stats sxg_nic_gstrings_stats[] = {
/* May be need in future */
/* {"dumb_rcv_broadcast_packets", SXG_NIC_STATS(Stats.DumbRcvBcastPkts)},
{"dumb_rcv_broadcast_bytes", SXG_NIC_STATS(Stats.DumbRcvBcastBytes)},
{"dumb_rcv_multicast_packets", SXG_NIC_STATS(Stats.DumbRcvMcastPkts)},
*/ {"dumb_rcv_multicast_packets", SXG_NIC_STATS(Stats.DumbRcvMcastPkts)},
{"dumb_rcv_multicast_bytes", SXG_NIC_STATS(Stats.DumbRcvMcastBytes)},
{"dumb_rcv_unicast_packets", SXG_NIC_STATS(Stats.DumbRcvUcastPkts)},
/* {"dumb_rcv_unicast_packets", SXG_NIC_STATS(Stats.DumbRcvUcastPkts)},
{"dumb_rcv_unicast_bytes", SXG_NIC_STATS(Stats.DumbRcvUcastBytes)},
*/
{"no_sgl_buffer", SXG_NIC_STATS(Stats.NoSglBuf)},
Expand Down

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