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igb: move all multicast addresses into multicast table array

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This patch moves all of the multicast addresses out of the free Receive
address registers and instead programs them all into the multicast table
array.  As a result the multicast filtering may not be as precise, but it
also greatly reduces the overhead for multicast addresses.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2009-07-23 18:08:54 +00:00 committed by David S. Miller
parent 009bc06e53
commit 28fc06f58b
6 changed files with 56 additions and 89 deletions
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59
drivers/net/igb/e1000_82575.c
View File

@ -797,65 +797,6 @@ static void igb_init_rx_addrs_82575(struct e1000_hw *hw, u16 rar_count)
hw->mac.ops.rar_set(hw, addr, i);
}
/**
* igb_update_mc_addr_list - Update Multicast addresses
* @hw: pointer to the HW structure
* @mc_addr_list: array of multicast addresses to program
* @mc_addr_count: number of multicast addresses to program
* @rar_used_count: the first RAR register free to program
* @rar_count: total number of supported Receive Address Registers
*
* Updates the Receive Address Registers and Multicast Table Array.
* The caller must have a packed mc_addr_list of multicast addresses.
* The parameter rar_count will usually be hw->mac.rar_entry_count
* unless there are workarounds that change this.
**/
void igb_update_mc_addr_list(struct e1000_hw *hw,
u8 *mc_addr_list, u32 mc_addr_count,
u32 rar_used_count, u32 rar_count)
{
u32 hash_value;
u32 i;
u8 addr[6] = {0,0,0,0,0,0};
/*
* This function is essentially the same as that of
* igb_update_mc_addr_list_generic. However it also takes care
* of the special case where the register offset of the
* second set of RARs begins elsewhere. This is implicitly taken care by
* function e1000_rar_set_generic.
*/
/*
* Load the first set of multicast addresses into the exact
* filters (RAR). If there are not enough to fill the RAR
* array, clear the filters.
*/
for (i = rar_used_count; i < rar_count; i++) {
if (mc_addr_count) {
igb_rar_set(hw, mc_addr_list, i);
mc_addr_count--;
mc_addr_list += ETH_ALEN;
} else {
igb_rar_set(hw, addr, i);
}
}
/* Clear the old settings from the MTA */
hw_dbg("Clearing MTA\n");
for (i = 0; i < hw->mac.mta_reg_count; i++) {
array_wr32(E1000_MTA, i, 0);
wrfl();
}
/* Load any remaining multicast addresses into the hash table. */
for (; mc_addr_count > 0; mc_addr_count--) {
hash_value = igb_hash_mc_addr(hw, mc_addr_list);
hw_dbg("Hash value = 0x%03X\n", hash_value);
igb_mta_set(hw, hash_value);
mc_addr_list += ETH_ALEN;
}
}
/**
* igb_shutdown_fiber_serdes_link_82575 - Remove link during power down
* @hw: pointer to the HW structure

1
drivers/net/igb/e1000_82575.h
View File

@ -28,7 +28,6 @@
#ifndef _E1000_82575_H_
#define _E1000_82575_H_
void igb_update_mc_addr_list(struct e1000_hw*, u8*, u32, u32, u32);
extern void igb_shutdown_fiber_serdes_link_82575(struct e1000_hw *hw);
extern void igb_rx_fifo_flush_82575(struct e1000_hw *hw);

4
drivers/net/igb/e1000_hw.h
View File

@ -338,6 +338,10 @@ struct e1000_mac_info {
u16 ifs_ratio;
u16 ifs_step_size;
u16 mta_reg_count;
/* Maximum size of the MTA register table in all supported adapters */
#define MAX_MTA_REG 128
u32 mta_shadow[MAX_MTA_REG];
u16 rar_entry_count;
u8 forced_speed_duplex;

35
drivers/net/igb/e1000_mac.c
View File

@ -260,6 +260,41 @@ void igb_mta_set(struct e1000_hw *hw, u32 hash_value)
wrfl();
}
/**
* igb_update_mc_addr_list - Update Multicast addresses
* @hw: pointer to the HW structure
* @mc_addr_list: array of multicast addresses to program
* @mc_addr_count: number of multicast addresses to program
*
* Updates entire Multicast Table Array.
* The caller must have a packed mc_addr_list of multicast addresses.
**/
void igb_update_mc_addr_list(struct e1000_hw *hw,
u8 *mc_addr_list, u32 mc_addr_count)
{
u32 hash_value, hash_bit, hash_reg;
int i;
/* clear mta_shadow */
memset(&hw->mac.mta_shadow, 0, sizeof(hw->mac.mta_shadow));
/* update mta_shadow from mc_addr_list */
for (i = 0; (u32) i < mc_addr_count; i++) {
hash_value = igb_hash_mc_addr(hw, mc_addr_list);
hash_reg = (hash_value >> 5) & (hw->mac.mta_reg_count - 1);
hash_bit = hash_value & 0x1F;
hw->mac.mta_shadow[hash_reg] |= (1 << hash_bit);
mc_addr_list += (ETH_ALEN);
}
/* replace the entire MTA table */
for (i = hw->mac.mta_reg_count - 1; i >= 0; i--)
array_wr32(E1000_MTA, i, hw->mac.mta_shadow[i]);
wrfl();
}
/**
* igb_hash_mc_addr - Generate a multicast hash value
* @hw: pointer to the HW structure

2
drivers/net/igb/e1000_mac.h
View File

@ -51,6 +51,8 @@ s32 igb_get_speed_and_duplex_copper(struct e1000_hw *hw, u16 *speed,
u16 *duplex);
s32 igb_id_led_init(struct e1000_hw *hw);
s32 igb_led_off(struct e1000_hw *hw);
void igb_update_mc_addr_list(struct e1000_hw *hw,
u8 *mc_addr_list, u32 mc_addr_count);
s32 igb_setup_link(struct e1000_hw *hw);
s32 igb_validate_mdi_setting(struct e1000_hw *hw);
s32 igb_write_8bit_ctrl_reg(struct e1000_hw *hw, u32 reg,

44
drivers/net/igb/igb_main.c
View File

@ -127,7 +127,7 @@ static void igb_restore_vlan(struct igb_adapter *);
static void igb_ping_all_vfs(struct igb_adapter *);
static void igb_msg_task(struct igb_adapter *);
static int igb_rcv_msg_from_vf(struct igb_adapter *, u32);
static void igb_set_mc_list_pools(struct igb_adapter *, int, u16);
static inline void igb_set_rah_pool(struct e1000_hw *, int , int);
static void igb_vmm_control(struct igb_adapter *);
static int igb_set_vf_mac(struct igb_adapter *adapter, int, unsigned char *);
static void igb_restore_vf_multicasts(struct igb_adapter *adapter);
@ -2535,7 +2535,6 @@ static void igb_set_multi(struct net_device *netdev)
{
struct igb_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
struct e1000_mac_info *mac = &hw->mac;
struct dev_mc_list *mc_ptr;
u8 *mta_list = NULL;
u32 rctl;
@ -2558,13 +2557,18 @@ static void igb_set_multi(struct net_device *netdev)
}
wr32(E1000_RCTL, rctl);
if (netdev->mc_count) {
mta_list = kzalloc(netdev->mc_count * 6, GFP_ATOMIC);
if (!mta_list) {
dev_err(&adapter->pdev->dev,
"failed to allocate multicast filter list\n");
return;
}
if (!netdev->mc_count) {
/* nothing to program, so clear mc list */
igb_update_mc_addr_list(hw, NULL, 0);
igb_restore_vf_multicasts(adapter);
return;
}
mta_list = kzalloc(netdev->mc_count * 6, GFP_ATOMIC);
if (!mta_list) {
dev_err(&adapter->pdev->dev,
"failed to allocate multicast filter list\n");
return;
}
/* The shared function expects a packed array of only addresses. */
@ -2576,14 +2580,9 @@ static void igb_set_multi(struct net_device *netdev)
memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr, ETH_ALEN);
mc_ptr = mc_ptr->next;
}
igb_update_mc_addr_list(hw, mta_list, i,
adapter->vfs_allocated_count + 1,
mac->rar_entry_count);
igb_set_mc_list_pools(adapter, i, mac->rar_entry_count);
igb_restore_vf_multicasts(adapter);
igb_update_mc_addr_list(hw, mta_list, i);
kfree(mta_list);
igb_restore_vf_multicasts(adapter);
}
/* Need to wait a few seconds after link up to get diagnostic information from
@ -5468,19 +5467,6 @@ static void igb_io_resume(struct pci_dev *pdev)
igb_get_hw_control(adapter);
}
static void igb_set_mc_list_pools(struct igb_adapter *adapter,
int entry_count, u16 total_rar_filters)
{
struct e1000_hw *hw = &adapter->hw;
int i = adapter->vfs_allocated_count + 1;
if ((i + entry_count) < total_rar_filters)
total_rar_filters = i + entry_count;
for (; i < total_rar_filters; i++)
igb_set_rah_pool(hw, adapter->vfs_allocated_count, i);
}
static int igb_set_vf_mac(struct igb_adapter *adapter,
int vf, unsigned char *mac_addr)
{