/* Must be called only after all slaves have been released */
static void
tlb_deinitialize(struct bonding *bond)
{
struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
_lock_tx_hashtbl(bond);
if (bond_info->tx_hashtbl == NULL) {
_unlock_tx_hashtbl(bond);
return;
}
kfree(bond_info->tx_hashtbl);
bond_info->tx_hashtbl = NULL;
_unlock_tx_hashtbl(bond);
}
/* Caller must hold bond lock for read */
struct slave*
tlb_choose_channel(struct bonding *bond, u32 hash_index, u32 skb_len)
{
struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
struct tlb_client_info *hash_table = NULL;
struct slave *assigned_slave = NULL;
_lock_tx_hashtbl(bond);
hash_table = bond_info->tx_hashtbl;
if (hash_table == NULL) {
printk (KERN_ERR "%s: TLB hash table is NULL\n",
bond->device->name);
_unlock_tx_hashtbl(bond);
return NULL;
}
assigned_slave = hash_table[hash_index].tx_slave;
if (!assigned_slave) {
assigned_slave = tlb_get_least_loaded_slave(bond);
if (assigned_slave) {
struct tlb_slave_info *slave_info =
&(SLAVE_TLB_INFO(assigned_slave));
u32 next_index = slave_info->head;
hash_table[hash_index].tx_slave = assigned_slave;
hash_table[hash_index].next = next_index;
hash_table[hash_index].prev = TLB_NULL_INDEX;
if (next_index != TLB_NULL_INDEX) {
hash_table[next_index].prev = hash_index;
}
slave_info->head = hash_index;
slave_info->load +=
hash_table[hash_index].load_history;
}
}
if (assigned_slave) {
hash_table[hash_index].tx_bytes += skb_len;
}
_unlock_tx_hashtbl(bond);
return assigned_slave;
}
/* Must be called before starting the monitor timer */
static int tlb_initialize(struct bonding *bond)
{
struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
int size = TLB_HASH_TABLE_SIZE * sizeof(struct tlb_client_info);
struct tlb_client_info *new_hashtbl;
int i;
spin_lock_init(&(bond_info->tx_hashtbl_lock));
new_hashtbl = kzalloc(size, GFP_KERNEL);
if (!new_hashtbl) {
pr_err("%s: Error: Failed to allocate TLB hash table\n",
bond->dev->name);
return -1;
}
_lock_tx_hashtbl(bond);
bond_info->tx_hashtbl = new_hashtbl;
for (i = 0; i < TLB_HASH_TABLE_SIZE; i++) {
tlb_init_table_entry(&bond_info->tx_hashtbl[i], 1);
}
_unlock_tx_hashtbl(bond);
return 0;
}
/* Must be called before starting the monitor timer */
static int
tlb_initialize(struct bonding *bond)
{
struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
int i;
size_t size;
#if(TLB_HASH_TABLE_SIZE != 256)
/* Key to the hash table is byte wide. Check the size! */
#error Hash Table size is wrong.
#endif
spin_lock_init(&(bond_info->tx_hashtbl_lock));
_lock_tx_hashtbl(bond);
if (bond_info->tx_hashtbl != NULL) {
printk (KERN_ERR "%s: TLB hash table is not NULL\n",
bond->device->name);
_unlock_tx_hashtbl(bond);
return -1;
}
size = TLB_HASH_TABLE_SIZE * sizeof(struct tlb_client_info);
bond_info->tx_hashtbl = kmalloc(size, GFP_KERNEL);
if (bond_info->tx_hashtbl == NULL) {
printk (KERN_ERR "%s: Failed to allocate TLB hash table\n",
bond->device->name);
_unlock_tx_hashtbl(bond);
return -1;
}
memset(bond_info->tx_hashtbl, 0, size);
for (i=0; i<TLB_HASH_TABLE_SIZE; i++) {
tlb_init_table_entry(bond, i, 1);
}
_unlock_tx_hashtbl(bond);
return 0;
}
/* Caller must hold bond lock for read */
static inline void
tlb_clear_slave(struct bonding *bond, struct slave *slave, u8 save_load)
{
struct tlb_client_info *tx_hash_table = NULL;
u32 index, next_index;
/* clear slave from tx_hashtbl */
_lock_tx_hashtbl(bond);
tx_hash_table = BOND_ALB_INFO(bond).tx_hashtbl;
if (tx_hash_table) {
index = SLAVE_TLB_INFO(slave).head;
while (index != TLB_NULL_INDEX) {
next_index = tx_hash_table[index].next;
tlb_init_table_entry(bond, index, save_load);
index = next_index;
}
}
_unlock_tx_hashtbl(bond);
tlb_init_slave(slave);
}
/* Caller must hold bond lock for read */
static void tlb_clear_slave(struct bonding *bond, struct slave *slave, int save_load)
{
struct tlb_client_info *tx_hash_table;
u32 index;
_lock_tx_hashtbl(bond);
/* clear slave from tx_hashtbl */
tx_hash_table = BOND_ALB_INFO(bond).tx_hashtbl;
/* skip this if we've already freed the tx hash table */
if (tx_hash_table) {
index = SLAVE_TLB_INFO(slave).head;
while (index != TLB_NULL_INDEX) {
u32 next_index = tx_hash_table[index].next;
tlb_init_table_entry(&tx_hash_table[index], save_load);
index = next_index;
}
}
tlb_init_slave(slave);
_unlock_tx_hashtbl(bond);
}