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ethernet/atheros: use core min/max MTU checking

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atl2: min_mtu 40, max_mtu 1504

- Remove a few redundant defines that already have equivalents in
  if_ether.h.

atl1: min_mtu 42, max_mtu 10218

atl1e: min_mtu 42, max_mtu 8170

atl1c: min_mtu 42, max_mtu 6122/1500

- GbE hardware gets a max_mtu of 6122, slower hardware gets 1500.

alx: min_mtu 34, max_mtu 9256

- Not so sure that minimum MTU number is really what was intended, but
  that's what the math actually makes it out to be, due to max_frame
  manipulations and comparison in alx_change_mtu, rather than just
  comparing new_mtu. (I think 68 was the intended min_mtu value).

CC: netdev@vger.kernel.org
CC: Jay Cliburn <jcliburn@gmail.com>
CC: Chris Snook <chris.snook@gmail.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jarod Wilson
2016-10-17 15:54:03 -04:00
committed by David S. Miller
parent 60d2d8dd9e
commit 67bef94280
7 changed files with 46 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/atheros/alx/hw.h
View File

@ -351,7 +351,6 @@ struct alx_rrd {
#define ALX_MAX_JUMBO_PKT_SIZE (9*1024)
#define ALX_MAX_TSO_PKT_SIZE (7*1024)
#define ALX_MAX_FRAME_SIZE ALX_MAX_JUMBO_PKT_SIZE
#define ALX_MIN_FRAME_SIZE (ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN)
#define ALX_MAX_RX_QUEUES 8
#define ALX_MAX_TX_QUEUES 4

10
drivers/net/ethernet/atheros/alx/main.c
View File

@ -892,6 +892,9 @@ static int alx_init_sw(struct alx_priv *alx)
hw->smb_timer = 400;
hw->mtu = alx->dev->mtu;
alx->rxbuf_size = ALX_MAX_FRAME_LEN(hw->mtu);
/* MTU range: 34 - 9256 */
alx->dev->min_mtu = 34;
alx->dev->max_mtu = ALX_MAX_FRAME_LEN(ALX_MAX_FRAME_SIZE);
alx->tx_ringsz = 256;
alx->rx_ringsz = 512;
hw->imt = 200;
@ -994,13 +997,6 @@ static int alx_change_mtu(struct net_device *netdev, int mtu)
struct alx_priv *alx = netdev_priv(netdev);
int max_frame = ALX_MAX_FRAME_LEN(mtu);
if ((max_frame < ALX_MIN_FRAME_SIZE) ||
(max_frame > ALX_MAX_FRAME_SIZE))
return -EINVAL;
if (netdev->mtu == mtu)
return 0;
netdev->mtu = mtu;
alx->hw.mtu = mtu;
alx->rxbuf_size = max(max_frame, ALX_DEF_RXBUF_SIZE);

39
drivers/net/ethernet/atheros/atl1c/atl1c_main.c
View File

@ -519,6 +519,26 @@ static int atl1c_set_features(struct net_device *netdev,
return 0;
}
static void atl1c_set_max_mtu(struct net_device *netdev)
{
struct atl1c_adapter *adapter = netdev_priv(netdev);
struct atl1c_hw *hw = &adapter->hw;
switch (hw->nic_type) {
/* These (GbE) devices support jumbo packets, max_mtu 6122 */
case athr_l1c:
case athr_l1d:
case athr_l1d_2:
netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
(ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
break;
/* The 10/100 devices don't support jumbo packets, max_mtu 1500 */
default:
netdev->max_mtu = ETH_DATA_LEN;
break;
}
}
/**
* atl1c_change_mtu - Change the Maximum Transfer Unit
* @netdev: network interface device structure
@ -529,22 +549,9 @@ static int atl1c_set_features(struct net_device *netdev,
static int atl1c_change_mtu(struct net_device *netdev, int new_mtu)
{
struct atl1c_adapter *adapter = netdev_priv(netdev);
struct atl1c_hw *hw = &adapter->hw;
int old_mtu = netdev->mtu;
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
/* Fast Ethernet controller doesn't support jumbo packet */
if (((hw->nic_type == athr_l2c ||
hw->nic_type == athr_l2c_b ||
hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) ||
max_frame < ETH_ZLEN + ETH_FCS_LEN ||
max_frame > MAX_JUMBO_FRAME_SIZE) {
if (netif_msg_link(adapter))
dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
return -EINVAL;
}
/* set MTU */
if (old_mtu != new_mtu && netif_running(netdev)) {
if (netif_running(netdev)) {
while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
msleep(1);
netdev->mtu = new_mtu;
@ -2511,6 +2518,7 @@ static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
netdev->netdev_ops = &atl1c_netdev_ops;
netdev->watchdog_timeo = AT_TX_WATCHDOG;
netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
atl1c_set_ethtool_ops(netdev);
/* TODO: add when ready */
@ -2613,6 +2621,9 @@ static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
dev_err(&pdev->dev, "net device private data init failed\n");
goto err_sw_init;
}
/* set max MTU */
atl1c_set_max_mtu(netdev);
atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE);
/* Init GPHY as early as possible due to power saving issue */

12
drivers/net/ethernet/atheros/atl1e/atl1e_main.c
View File

@ -439,16 +439,10 @@ static int atl1e_set_features(struct net_device *netdev,
static int atl1e_change_mtu(struct net_device *netdev, int new_mtu)
{
struct atl1e_adapter *adapter = netdev_priv(netdev);
int old_mtu = netdev->mtu;
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
(max_frame > MAX_JUMBO_FRAME_SIZE)) {
netdev_warn(adapter->netdev, "invalid MTU setting\n");
return -EINVAL;
}
/* set MTU */
if (old_mtu != new_mtu && netif_running(netdev)) {
if (netif_running(netdev)) {
while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
msleep(1);
netdev->mtu = new_mtu;
@ -2272,6 +2266,10 @@ static int atl1e_init_netdev(struct net_device *netdev, struct pci_dev *pdev)
netdev->netdev_ops = &atl1e_netdev_ops;
netdev->watchdog_timeo = AT_TX_WATCHDOG;
/* MTU range: 42 - 8170 */
netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
(ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
atl1e_set_ethtool_ops(netdev);
netdev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO |

15
drivers/net/ethernet/atheros/atlx/atl1.c
View File

@ -2701,23 +2701,15 @@ static void atl1_reset_dev_task(struct work_struct *work)
static int atl1_change_mtu(struct net_device *netdev, int new_mtu)
{
struct atl1_adapter *adapter = netdev_priv(netdev);
int old_mtu = netdev->mtu;
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
(max_frame > MAX_JUMBO_FRAME_SIZE)) {
if (netif_msg_link(adapter))
dev_warn(&adapter->pdev->dev, "invalid MTU setting\n");
return -EINVAL;
}
adapter->hw.max_frame_size = max_frame;
adapter->hw.tx_jumbo_task_th = (max_frame + 7) >> 3;
adapter->rx_buffer_len = (max_frame + 7) & ~7;
adapter->hw.rx_jumbo_th = adapter->rx_buffer_len / 8;
netdev->mtu = new_mtu;
if ((old_mtu != new_mtu) && netif_running(netdev)) {
if (netif_running(netdev)) {
atl1_down(adapter);
atl1_up(adapter);
}
@ -3031,6 +3023,11 @@ static int atl1_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
/* is this valid? see atl1_setup_mac_ctrl() */
netdev->features |= NETIF_F_RXCSUM;
/* MTU range: 42 - 10218 */
netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
(ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
/*
* patch for some L1 of old version,
* the final version of L1 may not need these

16
drivers/net/ethernet/atheros/atlx/atl2.c
View File

@ -253,7 +253,7 @@ static int atl2_configure(struct atl2_adapter *adapter)
/* set MTU */
ATL2_WRITE_REG(hw, REG_MTU, adapter->netdev->mtu +
ENET_HEADER_SIZE + VLAN_SIZE + ETHERNET_FCS_SIZE);
ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
/* 1590 */
ATL2_WRITE_REG(hw, REG_TX_CUT_THRESH, 0x177);
@ -925,15 +925,11 @@ static int atl2_change_mtu(struct net_device *netdev, int new_mtu)
struct atl2_adapter *adapter = netdev_priv(netdev);
struct atl2_hw *hw = &adapter->hw;
if ((new_mtu < 40) || (new_mtu > (ETH_DATA_LEN + VLAN_SIZE)))
return -EINVAL;
/* set MTU */
if (hw->max_frame_size != new_mtu) {
netdev->mtu = new_mtu;
ATL2_WRITE_REG(hw, REG_MTU, new_mtu + ENET_HEADER_SIZE +
VLAN_SIZE + ETHERNET_FCS_SIZE);
}
netdev->mtu = new_mtu;
hw->max_frame_size = new_mtu;
ATL2_WRITE_REG(hw, REG_MTU, new_mtu + ETH_HLEN +
VLAN_HLEN + ETH_FCS_LEN);
return 0;
}
@ -1398,6 +1394,8 @@ static int atl2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
netdev->netdev_ops = &atl2_netdev_ops;
netdev->ethtool_ops = &atl2_ethtool_ops;
netdev->watchdog_timeo = 5 * HZ;
netdev->min_mtu = 40;
netdev->max_mtu = ETH_DATA_LEN + VLAN_HLEN;
strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
netdev->mem_start = mmio_start;

3
drivers/net/ethernet/atheros/atlx/atl2.h
View File

@ -228,12 +228,9 @@ static void atl2_force_ps(struct atl2_hw *hw);
#define AUTONEG_ADVERTISE_SPEED_DEFAULT 0x000F /* Everything */
/* The size (in bytes) of a ethernet packet */
#define ENET_HEADER_SIZE 14
#define MAXIMUM_ETHERNET_FRAME_SIZE 1518 /* with FCS */
#define MINIMUM_ETHERNET_FRAME_SIZE 64 /* with FCS */
#define ETHERNET_FCS_SIZE 4
#define MAX_JUMBO_FRAME_SIZE 0x2000
#define VLAN_SIZE 4
struct tx_pkt_header {
unsigned pkt_size:11;