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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Chelsio Communications, Inc. All rights reserved. */
#include "cxgb4.h"
static int cxgb4_mps_ref_dec(struct adapter *adap, u16 idx)
{
struct mps_entries_ref *mps_entry, *tmp;
int ret = -EINVAL;
spin_lock(&adap->mps_ref_lock);
list_for_each_entry_safe(mps_entry, tmp, &adap->mps_ref, list) {
if (mps_entry->idx == idx) {
if (!refcount_dec_and_test(&mps_entry->refcnt)) {
spin_unlock(&adap->mps_ref_lock);
return -EBUSY;
}
list_del(&mps_entry->list);
kfree(mps_entry);
ret = 0;
break;
}
}
spin_unlock(&adap->mps_ref_lock);
return ret;
}
static int cxgb4_mps_ref_inc(struct adapter *adap, const u8 *mac_addr,
u16 idx, const u8 *mask)
{
u8 bitmask[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
struct mps_entries_ref *mps_entry;
int ret = 0;
spin_lock_bh(&adap->mps_ref_lock);
list_for_each_entry(mps_entry, &adap->mps_ref, list) {
if (mps_entry->idx == idx) {
refcount_inc(&mps_entry->refcnt);
goto unlock;
}
}
mps_entry = kzalloc(sizeof(*mps_entry), GFP_ATOMIC);
if (!mps_entry) {
ret = -ENOMEM;
goto unlock;
}
ether_addr_copy(mps_entry->mask, mask ? mask : bitmask);
ether_addr_copy(mps_entry->addr, mac_addr);
mps_entry->idx = idx;
refcount_set(&mps_entry->refcnt, 1);
list_add_tail(&mps_entry->list, &adap->mps_ref);
unlock:
spin_unlock_bh(&adap->mps_ref_lock);
return ret;
}
int cxgb4_free_encap_mac_filt(struct adapter *adap, unsigned int viid,
int idx, bool sleep_ok)
{
int ret = 0;
if (!cxgb4_mps_ref_dec(adap, idx))
ret = t4_free_encap_mac_filt(adap, viid, idx, sleep_ok);
return ret;
}
int cxgb4_alloc_encap_mac_filt(struct adapter *adap, unsigned int viid,
const u8 *addr, const u8 *mask,
unsigned int vni, unsigned int vni_mask,
u8 dip_hit, u8 lookup_type, bool sleep_ok)
{
int ret;
ret = t4_alloc_encap_mac_filt(adap, viid, addr, mask, vni, vni_mask,
dip_hit, lookup_type, sleep_ok);
if (ret < 0)
return ret;
if (cxgb4_mps_ref_inc(adap, addr, ret, mask)) {
ret = -ENOMEM;
t4_free_encap_mac_filt(adap, viid, ret, sleep_ok);
}
return ret;
}
int cxgb4_init_mps_ref_entries(struct adapter *adap)
{
spin_lock_init(&adap->mps_ref_lock);
INIT_LIST_HEAD(&adap->mps_ref);
return 0;
}
void cxgb4_free_mps_ref_entries(struct adapter *adap)
{
struct mps_entries_ref *mps_entry, *tmp;
if (!list_empty(&adap->mps_ref))
return;
spin_lock(&adap->mps_ref_lock);
list_for_each_entry_safe(mps_entry, tmp, &adap->mps_ref, list) {
list_del(&mps_entry->list);
kfree(mps_entry);
}
spin_unlock(&adap->mps_ref_lock);
}
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