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cxgb4: Add MPS refcounting for alloc/free mac filters

Browse source 
This patch adds reference counting support for
alloc/free mac filters

Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Raju Rangoju 2019-06-24 23:05:35 +05:30 committed by David S. Miller
parent 2f0b9406f3
commit f9f329ad87
3 changed files with 87 additions and 3 deletions
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6
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
View file

@ -1915,6 +1915,12 @@ int cxgb4_change_mac(struct port_info *pi, unsigned int viid,
int *tcam_idx, const u8 *addr,
bool persistent, u8 *smt_idx);
int cxgb4_alloc_mac_filt(struct adapter *adap, unsigned int viid,
bool free, unsigned int naddr,
const u8 **addr, u16 *idx,
u64 *hash, bool sleep_ok);
int cxgb4_free_mac_filt(struct adapter *adap, unsigned int viid,
unsigned int naddr, const u8 **addr, bool sleep_ok);
int cxgb4_init_mps_ref_entries(struct adapter *adap);
void cxgb4_free_mps_ref_entries(struct adapter *adap);
int cxgb4_alloc_encap_mac_filt(struct adapter *adap, unsigned int viid,

12
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
View file

@ -366,13 +366,19 @@ static int cxgb4_mac_sync(struct net_device *netdev, const u8 *mac_addr)
int ret;
u64 mhash = 0;
u64 uhash = 0;
/* idx stores the index of allocated filters,
* its size should be modified based on the number of
* MAC addresses that we allocate filters for
*/
u16 idx[1] = {};
bool free = false;
bool ucast = is_unicast_ether_addr(mac_addr);
const u8 *maclist[1] = {mac_addr};
struct hash_mac_addr *new_entry;
ret = t4_alloc_mac_filt(adap, adap->mbox, pi->viid, free, 1, maclist,
NULL, ucast ? &uhash : &mhash, false);
ret = cxgb4_alloc_mac_filt(adap, pi->viid, free, 1, maclist,
idx, ucast ? &uhash : &mhash, false);
if (ret < 0)
goto out;
/* if hash != 0, then add the addr to hash addr list
@ -410,7 +416,7 @@ static int cxgb4_mac_unsync(struct net_device *netdev, const u8 *mac_addr)
}
}
ret = t4_free_mac_filt(adap, adap->mbox, pi->viid, 1, maclist, false);
ret = cxgb4_free_mac_filt(adap, pi->viid, 1, maclist, false);
return ret < 0 ? -EINVAL : 0;
}

72
drivers/net/ethernet/chelsio/cxgb4/cxgb4_mps.c
View file

@ -3,6 +3,31 @@
#include "cxgb4.h"
static int cxgb4_mps_ref_dec_by_mac(struct adapter *adap,
const u8 *addr, const u8 *mask)
{
u8 bitmask[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
struct mps_entries_ref *mps_entry, *tmp;
int ret = -EINVAL;
spin_lock_bh(&adap->mps_ref_lock);
list_for_each_entry_safe(mps_entry, tmp, &adap->mps_ref, list) {
if (ether_addr_equal(mps_entry->addr, addr) &&
ether_addr_equal(mps_entry->mask, mask ? mask : bitmask)) {
if (!refcount_dec_and_test(&mps_entry->refcnt)) {
spin_unlock_bh(&adap->mps_ref_lock);
return -EBUSY;
}
list_del(&mps_entry->list);
kfree(mps_entry);
ret = 0;
break;
}
}
spin_unlock_bh(&adap->mps_ref_lock);
return ret;
}
static int cxgb4_mps_ref_dec(struct adapter *adap, u16 idx)
{
struct mps_entries_ref *mps_entry, *tmp;
@ -54,6 +79,53 @@ static int cxgb4_mps_ref_inc(struct adapter *adap, const u8 *mac_addr,
return ret;
}
int cxgb4_free_mac_filt(struct adapter *adap, unsigned int viid,
unsigned int naddr, const u8 **addr, bool sleep_ok)
{
int ret, i;
for (i = 0; i < naddr; i++) {
if (!cxgb4_mps_ref_dec_by_mac(adap, addr[i], NULL)) {
ret = t4_free_mac_filt(adap, adap->mbox, viid,
1, &addr[i], sleep_ok);
if (ret < 0)
return ret;
}
}
/* return number of filters freed */
return naddr;
}
int cxgb4_alloc_mac_filt(struct adapter *adap, unsigned int viid,
bool free, unsigned int naddr, const u8 **addr,
u16 *idx, u64 *hash, bool sleep_ok)
{
int ret, i;
ret = t4_alloc_mac_filt(adap, adap->mbox, viid, free,
naddr, addr, idx, hash, sleep_ok);
if (ret < 0)
return ret;
for (i = 0; i < naddr; i++) {
if (idx[i] != 0xffff) {
if (cxgb4_mps_ref_inc(adap, addr[i], idx[i], NULL)) {
ret = -ENOMEM;
goto error;
}
}
}
goto out;
error:
cxgb4_free_mac_filt(adap, viid, naddr, addr, sleep_ok);
out:
/* Returns a negative error number or the number of filters allocated */
return ret;
}
int cxgb4_update_mac_filt(struct port_info *pi, unsigned int viid,
int *tcam_idx, const u8 *addr,
bool persistent, u8 *smt_idx)