diff options
Diffstat (limited to 'drivers/net')
32 files changed, 159 insertions, 210 deletions
diff --git a/drivers/net/ethernet/agere/et131x.c b/drivers/net/ethernet/agere/et131x.c index 906683851c7d..831bab352f8e 100644 --- a/drivers/net/ethernet/agere/et131x.c +++ b/drivers/net/ethernet/agere/et131x.c @@ -176,6 +176,8 @@ MODULE_DESCRIPTION("10/100/1000 Base-T Ethernet Driver for the ET1310 by Agere S #define NUM_FBRS 2 #define MAX_PACKETS_HANDLED 256 +#define ET131X_MIN_MTU 64 +#define ET131X_MAX_MTU 9216 #define ALCATEL_MULTICAST_PKT 0x01000000 #define ALCATEL_BROADCAST_PKT 0x02000000 @@ -3869,9 +3871,6 @@ static int et131x_change_mtu(struct net_device *netdev, int new_mtu) int result = 0; struct et131x_adapter *adapter = netdev_priv(netdev); - if (new_mtu < 64 || new_mtu > 9216) - return -EINVAL; - et131x_disable_txrx(netdev); netdev->mtu = new_mtu; @@ -3958,6 +3957,8 @@ static int et131x_pci_setup(struct pci_dev *pdev, netdev->watchdog_timeo = ET131X_TX_TIMEOUT; netdev->netdev_ops = &et131x_netdev_ops; + netdev->min_mtu = ET131X_MIN_MTU; + netdev->max_mtu = ET131X_MAX_MTU; SET_NETDEV_DEV(netdev, &pdev->dev); netdev->ethtool_ops = &et131x_ethtool_ops; diff --git a/drivers/net/ethernet/altera/altera_tse.h b/drivers/net/ethernet/altera/altera_tse.h index e0052003d16f..9b640c8fbc28 100644 --- a/drivers/net/ethernet/altera/altera_tse.h +++ b/drivers/net/ethernet/altera/altera_tse.h @@ -443,7 +443,6 @@ struct altera_tse_private { /* RX/TX MAC FIFO configs */ u32 tx_fifo_depth; u32 rx_fifo_depth; - u32 max_mtu; /* Hash filter settings */ u32 hash_filter; diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/ethernet/altera/altera_tse_main.c index bda31f308cc2..cc9787e33acf 100644 --- a/drivers/net/ethernet/altera/altera_tse_main.c +++ b/drivers/net/ethernet/altera/altera_tse_main.c @@ -994,20 +994,11 @@ static void tse_set_mac(struct altera_tse_private *priv, bool enable) */ static int tse_change_mtu(struct net_device *dev, int new_mtu) { - struct altera_tse_private *priv = netdev_priv(dev); - unsigned int max_mtu = priv->max_mtu; - unsigned int min_mtu = ETH_ZLEN + ETH_FCS_LEN; - if (netif_running(dev)) { netdev_err(dev, "must be stopped to change its MTU\n"); return -EBUSY; } - if ((new_mtu < min_mtu) || (new_mtu > max_mtu)) { - netdev_err(dev, "invalid MTU, max MTU is: %u\n", max_mtu); - return -EINVAL; - } - dev->mtu = new_mtu; netdev_update_features(dev); @@ -1446,15 +1437,16 @@ static int altera_tse_probe(struct platform_device *pdev) of_property_read_bool(pdev->dev.of_node, "altr,has-supplementary-unicast"); + priv->dev->min_mtu = ETH_ZLEN + ETH_FCS_LEN; /* Max MTU is 1500, ETH_DATA_LEN */ - priv->max_mtu = ETH_DATA_LEN; + priv->dev->max_mtu = ETH_DATA_LEN; /* Get the max mtu from the device tree. Note that the * "max-frame-size" parameter is actually max mtu. Definition * in the ePAPR v1.1 spec and usage differ, so go with usage. */ of_property_read_u32(pdev->dev.of_node, "max-frame-size", - &priv->max_mtu); + &priv->dev->max_mtu); /* The DMA buffer size already accounts for an alignment bias * to avoid unaligned access exceptions for the NIOS processor, diff --git a/drivers/net/ethernet/amd/amd8111e.c b/drivers/net/ethernet/amd/amd8111e.c index f92cc97151ec..84b4ffbd084a 100644 --- a/drivers/net/ethernet/amd/amd8111e.c +++ b/drivers/net/ethernet/amd/amd8111e.c @@ -1556,9 +1556,6 @@ static int amd8111e_change_mtu(struct net_device *dev, int new_mtu) struct amd8111e_priv *lp = netdev_priv(dev); int err; - if ((new_mtu < AMD8111E_MIN_MTU) || (new_mtu > AMD8111E_MAX_MTU)) - return -EINVAL; - if (!netif_running(dev)) { /* new_mtu will be used * when device starts netxt time @@ -1874,6 +1871,8 @@ static int amd8111e_probe_one(struct pci_dev *pdev, dev->ethtool_ops = &ops; dev->irq =pdev->irq; dev->watchdog_timeo = AMD8111E_TX_TIMEOUT; + dev->min_mtu = AMD8111E_MIN_MTU; + dev->max_mtu = AMD8111E_MAX_MTU; netif_napi_add(dev, &lp->napi, amd8111e_rx_poll, 32); #if AMD8111E_VLAN_TAG_USED diff --git a/drivers/net/ethernet/brocade/bna/bnad.c b/drivers/net/ethernet/brocade/bna/bnad.c index f9df4b5ae90e..b200a783443e 100644 --- a/drivers/net/ethernet/brocade/bna/bnad.c +++ b/drivers/net/ethernet/brocade/bna/bnad.c @@ -3296,9 +3296,6 @@ bnad_change_mtu(struct net_device *netdev, int new_mtu) struct bnad *bnad = netdev_priv(netdev); u32 rx_count = 0, frame, new_frame; - if (new_mtu + ETH_HLEN < ETH_ZLEN || new_mtu > BNAD_JUMBO_MTU) - return -EINVAL; - mutex_lock(&bnad->conf_mutex); mtu = netdev->mtu; @@ -3465,6 +3462,10 @@ bnad_netdev_init(struct bnad *bnad, bool using_dac) netdev->mem_start = bnad->mmio_start; netdev->mem_end = bnad->mmio_start + bnad->mmio_len - 1; + /* MTU range: 46 - 9000 */ + netdev->min_mtu = ETH_ZLEN - ETH_HLEN; + netdev->max_mtu = BNAD_JUMBO_MTU; + netdev->netdev_ops = &bnad_netdev_ops; bnad_set_ethtool_ops(netdev); } diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c index 20e72044b765..e83781ad4477 100644 --- a/drivers/net/ethernet/cadence/macb.c +++ b/drivers/net/ethernet/cadence/macb.c @@ -56,7 +56,7 @@ #define MACB_MAX_TX_LEN ((unsigned int)((1 << MACB_TX_FRMLEN_SIZE) - 1)) #define GEM_MAX_TX_LEN ((unsigned int)((1 << GEM_TX_FRMLEN_SIZE) - 1)) -#define GEM_MTU_MIN_SIZE 68 +#define GEM_MTU_MIN_SIZE ETH_MIN_MTU #define MACB_WOL_HAS_MAGIC_PACKET (0x1 << 0) #define MACB_WOL_ENABLED (0x1 << 1) @@ -1986,19 +1986,9 @@ static int macb_close(struct net_device *dev) static int macb_change_mtu(struct net_device *dev, int new_mtu) { - struct macb *bp = netdev_priv(dev); - u32 max_mtu; - if (netif_running(dev)) return -EBUSY; - max_mtu = ETH_DATA_LEN; - if (bp->caps & MACB_CAPS_JUMBO) - max_mtu = gem_readl(bp, JML) - ETH_HLEN - ETH_FCS_LEN; - - if ((new_mtu > max_mtu) || (new_mtu < GEM_MTU_MIN_SIZE)) - return -EINVAL; - dev->mtu = new_mtu; return 0; @@ -3027,6 +3017,13 @@ static int macb_probe(struct platform_device *pdev) goto err_out_free_netdev; } + /* MTU range: 68 - 1500 or 10240 */ + dev->min_mtu = GEM_MTU_MIN_SIZE; + if (bp->caps & MACB_CAPS_JUMBO) + dev->max_mtu = gem_readl(bp, JML) - ETH_HLEN - ETH_FCS_LEN; + else + dev->max_mtu = ETH_DATA_LEN; + mac = of_get_mac_address(np); if (mac) ether_addr_copy(bp->dev->dev_addr, mac); diff --git a/drivers/net/ethernet/calxeda/xgmac.c b/drivers/net/ethernet/calxeda/xgmac.c index 63efa0dc45ba..6e723662ee69 100644 --- a/drivers/net/ethernet/calxeda/xgmac.c +++ b/drivers/net/ethernet/calxeda/xgmac.c @@ -394,7 +394,7 @@ struct xgmac_priv { }; /* XGMAC Configuration Settings */ -#define MAX_MTU 9000 +#define XGMAC_MAX_MTU 9000 #define PAUSE_TIME 0x400 #define DMA_RX_RING_SZ 256 @@ -1360,20 +1360,6 @@ out: */ static int xgmac_change_mtu(struct net_device *dev, int new_mtu) { - struct xgmac_priv *priv = netdev_priv(dev); - int old_mtu; - - if ((new_mtu < 46) || (new_mtu > MAX_MTU)) { - netdev_err(priv->dev, "invalid MTU, max MTU is: %d\n", MAX_MTU); - return -EINVAL; - } - - old_mtu = dev->mtu; - - /* return early if the buffer sizes will not change */ - if (old_mtu == new_mtu) - return 0; - /* Stop everything, get ready to change the MTU */ if (!netif_running(dev)) return 0; @@ -1804,6 +1790,10 @@ static int xgmac_probe(struct platform_device *pdev) ndev->features |= ndev->hw_features; ndev->priv_flags |= IFF_UNICAST_FLT; + /* MTU range: 46 - 9000 */ + ndev->min_mtu = ETH_ZLEN - ETH_HLEN; + ndev->max_mtu = XGMAC_MAX_MTU; + /* Get the MAC address */ xgmac_get_mac_addr(priv->base, ndev->dev_addr, 0); if (!is_valid_ether_addr(ndev->dev_addr)) diff --git a/drivers/net/ethernet/chelsio/cxgb/common.h b/drivers/net/ethernet/chelsio/cxgb/common.h index 53b1f9478383..6916c62f2487 100644 --- a/drivers/net/ethernet/chelsio/cxgb/common.h +++ b/drivers/net/ethernet/chelsio/cxgb/common.h @@ -85,6 +85,11 @@ struct t1_rx_mode { #define SPEED_INVALID 0xffff #define DUPLEX_INVALID 0xff +/* Max frame size PM3393 can handle. Includes Ethernet header and CRC. */ +#define PM3393_MAX_FRAME_SIZE 9600 + +#define VSC7326_MAX_MTU 9600 + enum { CHBT_BOARD_N110, CHBT_BOARD_N210, diff --git a/drivers/net/ethernet/chelsio/cxgb/cxgb2.c b/drivers/net/ethernet/chelsio/cxgb/cxgb2.c index f5f1b0b51ebd..81d1d0bc7553 100644 --- a/drivers/net/ethernet/chelsio/cxgb/cxgb2.c +++ b/drivers/net/ethernet/chelsio/cxgb/cxgb2.c @@ -825,8 +825,6 @@ static int t1_change_mtu(struct net_device *dev, int new_mtu) if (!mac->ops->set_mtu) return -EOPNOTSUPP; - if (new_mtu < 68) - return -EINVAL; if ((ret = mac->ops->set_mtu(mac, new_mtu))) return ret; dev->mtu = new_mtu; @@ -1101,6 +1099,22 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent) netif_napi_add(netdev, &adapter->napi, t1_poll, 64); netdev->ethtool_ops = &t1_ethtool_ops; + + switch (bi->board) { + case CHBT_BOARD_CHT110: + case CHBT_BOARD_N110: + case CHBT_BOARD_N210: + case CHBT_BOARD_CHT210: + netdev->max_mtu = PM3393_MAX_FRAME_SIZE - + (ETH_HLEN + ETH_FCS_LEN); + break; + case CHBT_BOARD_CHN204: + netdev->max_mtu = VSC7326_MAX_MTU; + break; + default: + netdev->max_mtu = ETH_DATA_LEN; + break; + } } if (t1_init_sw_modules(adapter, bi) < 0) { diff --git a/drivers/net/ethernet/chelsio/cxgb/pm3393.c b/drivers/net/ethernet/chelsio/cxgb/pm3393.c index eb462d7db427..c27908e66f5e 100644 --- a/drivers/net/ethernet/chelsio/cxgb/pm3393.c +++ b/drivers/net/ethernet/chelsio/cxgb/pm3393.c @@ -47,9 +47,6 @@ #define OFFSET(REG_ADDR) ((REG_ADDR) << 2) -/* Max frame size PM3393 can handle. Includes Ethernet header and CRC. */ -#define MAX_FRAME_SIZE 9600 - #define IPG 12 #define TXXG_CONF1_VAL ((IPG << SUNI1x10GEXP_BITOFF_TXXG_IPGT) | \ SUNI1x10GEXP_BITMSK_TXXG_32BIT_ALIGN | SUNI1x10GEXP_BITMSK_TXXG_CRCEN | \ @@ -331,10 +328,7 @@ static int pm3393_set_mtu(struct cmac *cmac, int mtu) { int enabled = cmac->instance->enabled; - /* MAX_FRAME_SIZE includes header + FCS, mtu doesn't */ - mtu += 14 + 4; - if (mtu > MAX_FRAME_SIZE) - return -EINVAL; + mtu += ETH_HLEN + ETH_FCS_LEN; /* Disable Rx/Tx MAC before configuring it. */ if (enabled) diff --git a/drivers/net/ethernet/chelsio/cxgb/vsc7326.c b/drivers/net/ethernet/chelsio/cxgb/vsc7326.c index 6f30b6f78553..bdc895bd2a46 100644 --- a/drivers/net/ethernet/chelsio/cxgb/vsc7326.c +++ b/drivers/net/ethernet/chelsio/cxgb/vsc7326.c @@ -11,8 +11,6 @@ /* 30 minutes for full statistics update */ #define MAJOR_UPDATE_TICKS (1800 / STATS_TICK_SECS) -#define MAX_MTU 9600 - /* The egress WM value 0x01a01fff should be used only when the * interface is down (MAC port disabled). This is a workaround * for disabling the T2/MAC flow-control. When the interface is @@ -452,9 +450,6 @@ static int mac_set_mtu(struct cmac *mac, int mtu) { int port = mac->instance->index; - if (mtu > MAX_MTU) - return -EINVAL; - /* max_len includes header and FCS */ vsc_write(mac->adapter, REG_MAX_LEN(port), mtu + 14 + 4); return 0; diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c index 48f82ab6c25b..f514faf8b709 100644 --- a/drivers/net/ethernet/cisco/enic/enic_main.c +++ b/drivers/net/ethernet/cisco/enic/enic_main.c @@ -1843,9 +1843,6 @@ static int enic_change_mtu(struct net_device *netdev, int new_mtu) struct enic *enic = netdev_priv(netdev); int running = netif_running(netdev); - if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU) - return -EINVAL; - if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) return -EOPNOTSUPP; @@ -2751,6 +2748,10 @@ static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) netdev->priv_flags |= IFF_UNICAST_FLT; + /* MTU range: 68 - 9000 */ + netdev->min_mtu = ENIC_MIN_MTU; + netdev->max_mtu = ENIC_MAX_MTU; + err = register_netdev(netdev); if (err) { dev_err(dev, "Cannot register net device, aborting\n"); diff --git a/drivers/net/ethernet/cisco/enic/enic_res.h b/drivers/net/ethernet/cisco/enic/enic_res.h index 69f60afd6577..81f98a8b60e9 100644 --- a/drivers/net/ethernet/cisco/enic/enic_res.h +++ b/drivers/net/ethernet/cisco/enic/enic_res.h @@ -30,7 +30,7 @@ #define ENIC_MIN_RQ_DESCS 64 #define ENIC_MAX_RQ_DESCS 4096 -#define ENIC_MIN_MTU 68 +#define ENIC_MIN_MTU ETH_MIN_MTU #define ENIC_MAX_MTU 9000 #define ENIC_MULTICAST_PERFECT_FILTERS 32 diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c index 4b4f5bc0e279..409210413f5d 100644 --- a/drivers/net/ethernet/freescale/gianfar.c +++ b/drivers/net/ethernet/freescale/gianfar.c @@ -1338,7 +1338,10 @@ static int gfar_probe(struct platform_device *ofdev) /* Fill in the dev structure */ dev->watchdog_timeo = TX_TIMEOUT; + /* MTU range: 50 - 9586 */ dev->mtu = 1500; + dev->min_mtu = 50; + dev->max_mtu = GFAR_JUMBO_FRAME_SIZE - ETH_HLEN; dev->netdev_ops = &gfar_netdev_ops; dev->ethtool_ops = &gfar_ethtool_ops; @@ -2592,12 +2595,6 @@ static int gfar_set_mac_address(struct net_device *dev) static int gfar_change_mtu(struct net_device *dev, int new_mtu) { struct gfar_private *priv = netdev_priv(dev); - int frame_size = new_mtu + ETH_HLEN; - - if ((frame_size < 64) || (frame_size > GFAR_JUMBO_FRAME_SIZE)) { - netif_err(priv, drv, dev, "Invalid MTU setting\n"); - return -EINVAL; - } while (test_and_set_bit_lock(GFAR_RESETTING, &priv->state)) cpu_relax(); diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c index 22e141005cd9..d8e99416ab24 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c @@ -446,8 +446,7 @@ int hns_mac_set_mtu(struct hns_mac_cb *mac_cb, u32 new_mtu) if (mac_cb->mac_type == HNAE_PORT_DEBUG) max_frm = MAC_MAX_MTU_DBG; - if ((new_mtu < MAC_MIN_MTU) || (new_frm > max_frm) || - (new_frm > HNS_RCB_RING_MAX_BD_PER_PKT * buf_size)) + if (new_frm > HNS_RCB_RING_MAX_BD_PER_PKT * buf_size) return -EINVAL; if (!drv->config_max_frame_length) diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c index 059aaeda46b1..a7208673116c 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c @@ -22,6 +22,7 @@ #include "hnae.h" #include "hns_enet.h" +#include "hns_dsaf_mac.h" #define NIC_MAX_Q_PER_VF 16 #define HNS_NIC_TX_TIMEOUT (5 * HZ) @@ -1405,10 +1406,6 @@ static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu) struct hnae_handle *h = priv->ae_handle; int ret; - /* MTU < 68 is an error and causes problems on some kernels */ - if (new_mtu < 68) - return -EINVAL; - if (!h->dev->ops->set_mtu) return -ENOTSUPP; @@ -1953,14 +1950,20 @@ static int hns_nic_dev_probe(struct platform_device *pdev) NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM; ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; + /* MTU range: 68 - 9578 (v1) or 9706 (v2) */ + ndev->min_mtu = MAC_MIN_MTU; switch (priv->enet_ver) { case AE_VERSION_2: ndev->features |= NETIF_F_TSO | NETIF_F_TSO6; ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6; + ndev->max_mtu = MAC_MAX_MTU_V2 - + (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); break; default: + ndev->max_mtu = MAC_MAX_MTU - + (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); break; } diff --git a/drivers/net/ethernet/micrel/ksz884x.c b/drivers/net/ethernet/micrel/ksz884x.c index 280e761d3a97..97f6ef1fa7d0 100644 --- a/drivers/net/ethernet/micrel/ksz884x.c +++ b/drivers/net/ethernet/micrel/ksz884x.c @@ -5807,24 +5807,19 @@ static int netdev_change_mtu(struct net_device *dev, int new_mtu) if (hw->dev_count > 1) if (dev != hw_priv->dev) return 0; - if (new_mtu < 60) - return -EINVAL; - if (dev->mtu != new_mtu) { - hw_mtu = new_mtu + ETHERNET_HEADER_SIZE + 4; - if (hw_mtu > MAX_RX_BUF_SIZE) - return -EINVAL; - if (hw_mtu > REGULAR_RX_BUF_SIZE) { - hw->features |= RX_HUGE_FRAME; - hw_mtu = MAX_RX_BUF_SIZE; - } else { - hw->features &= ~RX_HUGE_FRAME; - hw_mtu = REGULAR_RX_BUF_SIZE; - } - hw_mtu = (hw_mtu + 3) & ~3; - hw_priv->mtu = hw_mtu; - dev->mtu = new_mtu; + hw_mtu = new_mtu + ETHERNET_HEADER_SIZE + 4; + if (hw_mtu > REGULAR_RX_BUF_SIZE) { + hw->features |= RX_HUGE_FRAME; + hw_mtu = MAX_RX_BUF_SIZE; + } else { + hw->features &= ~RX_HUGE_FRAME; + hw_mtu = REGULAR_RX_BUF_SIZE; } + hw_mtu = (hw_mtu + 3) & ~3; + hw_priv->mtu = hw_mtu; + dev->mtu = new_mtu; + return 0; } @@ -7099,6 +7094,12 @@ static int pcidev_init(struct pci_dev *pdev, const struct pci_device_id *id) dev->netdev_ops = &netdev_ops; dev->ethtool_ops = &netdev_ethtool_ops; + + /* MTU range: 60 - 1894 */ + dev->min_mtu = ETH_ZLEN; + dev->max_mtu = MAX_RX_BUF_SIZE - + (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); + if (register_netdev(dev)) goto pcidev_init_reg_err; port_set_power_saving(port, true); diff --git a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c index 6d1a956e3f77..5ae3f175cc23 100644 --- a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c +++ b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c @@ -3232,10 +3232,6 @@ static int myri10ge_change_mtu(struct net_device *dev, int new_mtu) struct myri10ge_priv *mgp = netdev_priv(dev); int error = 0; - if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) { - netdev_err(dev, "new mtu (%d) is not valid\n", new_mtu); - return -EINVAL; - } netdev_info(dev, "changing mtu from %d to %d\n", dev->mtu, new_mtu); if (mgp->running) { /* if we change the mtu on an active device, we must @@ -4086,13 +4082,19 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent) myri10ge_setup_dca(mgp); #endif pci_set_drvdata(pdev, mgp); - if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU) - myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN; - if ((myri10ge_initial_mtu + ETH_HLEN) < 68) - myri10ge_initial_mtu = 68; - netdev->netdev_ops = &myri10ge_netdev_ops; + /* MTU range: 68 - 9000 */ + netdev->min_mtu = ETH_MIN_MTU; + netdev->max_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN; + + if (myri10ge_initial_mtu > netdev->max_mtu) + myri10ge_initial_mtu = netdev->max_mtu; + if (myri10ge_initial_mtu < netdev->min_mtu) + myri10ge_initial_mtu = netdev->min_mtu; + netdev->mtu = myri10ge_initial_mtu; + + netdev->netdev_ops = &myri10ge_netdev_ops; netdev->hw_features = mgp->features | NETIF_F_RXCSUM; /* fake NETIF_F_HW_VLAN_CTAG_RX for good GRO performance */ diff --git a/drivers/net/ethernet/natsemi/natsemi.c b/drivers/net/ethernet/natsemi/natsemi.c index ed89029ff75b..22b0821c1da0 100644 --- a/drivers/net/ethernet/natsemi/natsemi.c +++ b/drivers/net/ethernet/natsemi/natsemi.c @@ -929,6 +929,10 @@ static int natsemi_probe1(struct pci_dev *pdev, const struct pci_device_id *ent) dev->ethtool_ops = ðtool_ops; + /* MTU range: 64 - 2024 */ + dev->min_mtu = ETH_ZLEN + ETH_FCS_LEN; + dev->max_mtu = NATSEMI_RX_LIMIT - NATSEMI_HEADERS; + if (mtu) dev->mtu = mtu; @@ -2526,9 +2530,6 @@ static void __set_rx_mode(struct net_device *dev) static int natsemi_change_mtu(struct net_device *dev, int new_mtu) { - if (new_mtu < 64 || new_mtu > NATSEMI_RX_LIMIT-NATSEMI_HEADERS) - return -EINVAL; - dev->mtu = new_mtu; /* synchronized against open : rtnl_lock() held by caller */ diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index aee3fd2b6538..d365760fa75b 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -2278,11 +2278,6 @@ static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) struct nfp_net_rx_ring *tmp_rings; int err; - if (new_mtu < 68 || new_mtu > nn->max_mtu) { - nn_err(nn, "New MTU (%d) is not valid\n", new_mtu); - return -EINVAL; - } - old_mtu = netdev->mtu; old_fl_bufsz = nn->fl_bufsz; new_fl_bufsz = NFP_NET_MAX_PREPEND + ETH_HLEN + VLAN_HLEN * 2 + new_mtu; @@ -2930,6 +2925,11 @@ int nfp_net_netdev_init(struct net_device *netdev) ether_setup(netdev); netdev->netdev_ops = &nfp_net_netdev_ops; netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); + + /* MTU range: 68 - hw-specific max */ + netdev->min_mtu = ETH_MIN_MTU; + netdev->max_mtu = nn->max_mtu; + netif_carrier_off(netdev); nfp_net_set_ethtool_ops(netdev); diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c index 9b0d7f463ff3..3913f07279d2 100644 --- a/drivers/net/ethernet/nvidia/forcedeth.c +++ b/drivers/net/ethernet/nvidia/forcedeth.c @@ -3008,17 +3008,12 @@ static int nv_change_mtu(struct net_device *dev, int new_mtu) struct fe_priv *np = netdev_priv(dev); int old_mtu; - if (new_mtu < 64 || new_mtu > np->pkt_limit) - return -EINVAL; - old_mtu = dev->mtu; dev->mtu = new_mtu; /* return early if the buffer sizes will not change */ if (old_mtu <= ETH_DATA_LEN && new_mtu <= ETH_DATA_LEN) return 0; - if (old_mtu == new_mtu) - return 0; /* synchronized against open : rtnl_lock() held by caller */ if (netif_running(dev)) { @@ -5719,6 +5714,10 @@ static int nv_probe(struct pci_dev *pci_dev, const struct pci_device_id *id) /* Add loopback capability to the device. */ dev->hw_features |= NETIF_F_LOOPBACK; + /* MTU range: 64 - 1500 or 9100 */ + dev->min_mtu = ETH_ZLEN + ETH_FCS_LEN; + dev->max_mtu = np->pkt_limit; + np->pause_flags = NV_PAUSEFRAME_RX_CAPABLE | NV_PAUSEFRAME_RX_REQ | NV_PAUSEFRAME_AUTONEG; if ((id->driver_data & DEV_HAS_PAUSEFRAME_TX_V1) || (id->driver_data & DEV_HAS_PAUSEFRAME_TX_V2) || diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c index 3cd87a41ac92..d461f419948e 100644 --- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c +++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c @@ -2260,16 +2260,10 @@ static int pch_gbe_set_mac(struct net_device *netdev, void *addr) static int pch_gbe_change_mtu(struct net_device *netdev, int new_mtu) { struct pch_gbe_adapter *adapter = netdev_priv(netdev); - int max_frame; + int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; unsigned long old_rx_buffer_len = adapter->rx_buffer_len; int err; - max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; - if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) || - (max_frame > PCH_GBE_MAX_JUMBO_FRAME_SIZE)) { - netdev_err(netdev, "Invalid MTU setting\n"); - return -EINVAL; - } if (max_frame <= PCH_GBE_FRAME_SIZE_2048) adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048; else if (max_frame <= PCH_GBE_FRAME_SIZE_4096) @@ -2633,6 +2627,11 @@ static int pch_gbe_probe(struct pci_dev *pdev, netdev->features = netdev->hw_features; pch_gbe_set_ethtool_ops(netdev); + /* MTU range: 46 - 10300 */ + netdev->min_mtu = ETH_ZLEN - ETH_HLEN; + netdev->max_mtu = PCH_GBE_MAX_JUMBO_FRAME_SIZE - + (ETH_HLEN + ETH_FCS_LEN); + pch_gbe_mac_load_mac_addr(&adapter->hw); pch_gbe_mac_reset_hw(&adapter->hw); diff --git a/drivers/net/ethernet/pasemi/pasemi_mac.c b/drivers/net/ethernet/pasemi/pasemi_mac.c index 2f4a837f0d6a..badfa1d562a4 100644 --- a/drivers/net/ethernet/pasemi/pasemi_mac.c +++ b/drivers/net/ethernet/pasemi/pasemi_mac.c @@ -53,7 +53,7 @@ * - Multiqueue RX/TX */ -#define PE_MIN_MTU 64 +#define PE_MIN_MTU (ETH_ZLEN + ETH_HLEN) #define PE_MAX_MTU 9000 #define PE_DEF_MTU ETH_DATA_LEN @@ -1611,9 +1611,6 @@ static int pasemi_mac_change_mtu(struct net_device *dev, int new_mtu) int running; int ret = 0; - if (new_mtu < PE_MIN_MTU || new_mtu > PE_MAX_MTU) - return -EINVAL; - running = netif_running(dev); if (running) { @@ -1635,7 +1632,7 @@ static int pasemi_mac_change_mtu(struct net_device *dev, int new_mtu) } /* Setup checksum channels if large MTU and none already allocated */ - if (new_mtu > 1500 && !mac->num_cs) { + if (new_mtu > PE_DEF_MTU && !mac->num_cs) { pasemi_mac_setup_csrings(mac); if (!mac->num_cs) { ret = -ENOMEM; @@ -1757,6 +1754,11 @@ pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent) dev->netdev_ops = &pasemi_netdev_ops; dev->mtu = PE_DEF_MTU; + + /* MTU range: 64 - 9000 */ + dev->min_mtu = PE_MIN_MTU; + dev->max_mtu = PE_MAX_MTU; + /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */ mac->bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128; diff --git a/drivers/net/ethernet/qualcomm/qca_framing.h b/drivers/net/ethernet/qualcomm/qca_framing.h index 5d965959c978..d5e795dcdf47 100644 --- a/drivers/net/ethernet/qualcomm/qca_framing.h +++ b/drivers/net/ethernet/qualcomm/qca_framing.h @@ -43,9 +43,9 @@ /* Frame length is invalid */ #define QCAFRM_INVFRAME (QCAFRM_ERR_BASE - 4) -/* Min/Max Ethernet MTU */ -#define QCAFRM_ETHMINMTU 46 -#define QCAFRM_ETHMAXMTU 1500 +/* Min/Max Ethernet MTU: 46/1500 */ +#define QCAFRM_ETHMINMTU (ETH_ZLEN - ETH_HLEN) +#define QCAFRM_ETHMAXMTU ETH_DATA_LEN /* Min/Max frame lengths */ #define QCAFRM_ETHMINLEN (QCAFRM_ETHMINMTU + ETH_HLEN) diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c index 6e2add979471..513e6c74e199 100644 --- a/drivers/net/ethernet/qualcomm/qca_spi.c +++ b/drivers/net/ethernet/qualcomm/qca_spi.c @@ -780,24 +780,12 @@ qcaspi_netdev_uninit(struct net_device *dev) dev_kfree_skb(qca->rx_skb); } -static int -qcaspi_netdev_change_mtu(struct net_device *dev, int new_mtu) -{ - if ((new_mtu < QCAFRM_ETHMINMTU) || (new_mtu > QCAFRM_ETHMAXMTU)) - return -EINVAL; - - dev->mtu = new_mtu; - - return 0; -} - static const struct net_device_ops qcaspi_netdev_ops = { .ndo_init = qcaspi_netdev_init, .ndo_uninit = qcaspi_netdev_uninit, .ndo_open = qcaspi_netdev_open, .ndo_stop = qcaspi_netdev_close, .ndo_start_xmit = qcaspi_netdev_xmit, - .ndo_change_mtu = qcaspi_netdev_change_mtu, .ndo_set_mac_address = eth_mac_addr, .ndo_tx_timeout = qcaspi_netdev_tx_timeout, .ndo_validate_addr = eth_validate_addr, @@ -814,6 +802,10 @@ qcaspi_netdev_setup(struct net_device *dev) dev->priv_flags &= ~IFF_TX_SKB_SHARING; dev->tx_queue_len = 100; + /* MTU range: 46 - 1500 */ + dev->min_mtu = QCAFRM_ETHMINMTU; + dev->max_mtu = QCAFRM_ETHMAXMTU; + qca = netdev_priv(dev); memset(qca, 0, sizeof(struct qcaspi)); diff --git a/drivers/net/ethernet/rocker/rocker_main.c b/drivers/net/ethernet/rocker/rocker_main.c index 5424fb341613..9b64f369076d 100644 --- a/drivers/net/ethernet/rocker/rocker_main.c +++ b/drivers/net/ethernet/rocker/rocker_main.c @@ -1953,12 +1953,6 @@ static int rocker_port_change_mtu(struct net_device *dev, int new_mtu) int running = netif_running(dev); int err; -#define ROCKER_PORT_MIN_MTU 68 -#define ROCKER_PORT_MAX_MTU 9000 - - if (new_mtu < ROCKER_PORT_MIN_MTU || new_mtu > ROCKER_PORT_MAX_MTU) - return -EINVAL; - if (running) rocker_port_stop(dev); @@ -2536,6 +2530,8 @@ static void rocker_port_dev_addr_init(struct rocker_port *rocker_port) } } +#define ROCKER_PORT_MIN_MTU ETH_MIN_MTU +#define ROCKER_PORT_MAX_MTU 9000 static int rocker_probe_port(struct rocker *rocker, unsigned int port_number) { const struct pci_dev *pdev = rocker->pdev; @@ -2570,6 +2566,10 @@ static int rocker_probe_port(struct rocker *rocker, unsigned int port_number) dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG; + /* MTU range: 68 - 9000 */ + dev->min_mtu = ROCKER_PORT_MIN_MTU; + dev->max_mtu = ROCKER_PORT_MAX_MTU; + err = rocker_world_port_pre_init(rocker_port); if (err) { dev_err(&pdev->dev, "port world pre-init failed\n"); diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c index ea44a2456ce1..5dbe40640da6 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c @@ -1820,19 +1820,6 @@ static int sxgbe_set_features(struct net_device *dev, */ static int sxgbe_change_mtu(struct net_device *dev, int new_mtu) { - /* RFC 791, page 25, "Every internet module must be able to forward - * a datagram of 68 octets without further fragmentation." - */ - if (new_mtu < MIN_MTU || (new_mtu > MAX_MTU)) { - netdev_err(dev, "invalid MTU, MTU should be in between %d and %d\n", - MIN_MTU, MAX_MTU); - return -EINVAL; - } - - /* Return if the buffer sizes will not change */ - if (dev->mtu == new_mtu) - return 0; - dev->mtu = new_mtu; if (!netif_running(dev)) @@ -2144,6 +2131,10 @@ struct sxgbe_priv_data *sxgbe_drv_probe(struct device *device, /* assign filtering support */ ndev->priv_flags |= IFF_UNICAST_FLT; + /* MTU range: 68 - 9000 */ + ndev->min_mtu = MIN_MTU; + ndev->max_mtu = MAX_MTU; + priv->msg_enable = netif_msg_init(debug, default_msg_level); /* Enable TCP segmentation offload for all DMA channels */ diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index da0b80a1917a..fa4a82f4656f 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -2715,27 +2715,11 @@ static void stmmac_set_rx_mode(struct net_device *dev) */ static int stmmac_change_mtu(struct net_device *dev, int new_mtu) { - struct stmmac_priv *priv = netdev_priv(dev); - int max_mtu; - if (netif_running(dev)) { pr_err("%s: must be stopped to change its MTU\n", dev->name); return -EBUSY; } - if ((priv->plat->enh_desc) || (priv->synopsys_id >= DWMAC_CORE_4_00)) - max_mtu = JUMBO_LEN; - else - max_mtu = SKB_MAX_HEAD(NET_SKB_PAD + NET_IP_ALIGN); - - if (priv->plat->maxmtu < max_mtu) - max_mtu = priv->plat->maxmtu; - - if ((new_mtu < 46) || (new_mtu > max_mtu)) { - pr_err("%s: invalid MTU, max MTU is: %d\n", dev->name, max_mtu); - return -EINVAL; - } - dev->mtu = new_mtu; netdev_update_features(dev); @@ -3317,6 +3301,15 @@ int stmmac_dvr_probe(struct device *device, #endif priv->msg_enable = netif_msg_init(debug, default_msg_level); + /* MTU range: 46 - hw-specific max */ + ndev->min_mtu = ETH_ZLEN - ETH_HLEN; + if ((priv->plat->enh_desc) || (priv->synopsys_id >= DWMAC_CORE_4_00)) + ndev->max_mtu = JUMBO_LEN; + else + ndev->max_mtu = SKB_MAX_HEAD(NET_SKB_PAD + NET_IP_ALIGN); + if (priv->plat->maxmtu < ndev->max_mtu) + ndev->max_mtu = priv->plat->maxmtu; + if (flow_ctrl) priv->flow_ctrl = FLOW_AUTO; /* RX/TX pause on */ diff --git a/drivers/net/ethernet/tehuti/tehuti.c b/drivers/net/ethernet/tehuti/tehuti.c index 7108c68f16d3..baa3e4a5731c 100644 --- a/drivers/net/ethernet/tehuti/tehuti.c +++ b/drivers/net/ethernet/tehuti/tehuti.c @@ -761,16 +761,6 @@ static int bdx_change_mtu(struct net_device *ndev, int new_mtu) { ENTER; - if (new_mtu == ndev->mtu) - RET(0); - - /* enforce minimum frame size */ - if (new_mtu < ETH_ZLEN) { - netdev_err(ndev, "mtu %d is less then minimal %d\n", - new_mtu, ETH_ZLEN); - RET(-EINVAL); - } - ndev->mtu = new_mtu; if (netif_running(ndev)) { bdx_close(ndev); @@ -2057,6 +2047,10 @@ bdx_probe(struct pci_dev *pdev, const struct pci_device_id *ent) #ifdef BDX_LLTX ndev->features |= NETIF_F_LLTX; #endif + /* MTU range: 60 - 16384 */ + ndev->min_mtu = ETH_ZLEN; + ndev->max_mtu = BDX_MAX_MTU; + spin_lock_init(&priv->tx_lock); /*bdx_hw_reset(priv); */ diff --git a/drivers/net/ethernet/tehuti/tehuti.h b/drivers/net/ethernet/tehuti/tehuti.h index 709ebd6e28b4..8e7b4c9abf21 100644 --- a/drivers/net/ethernet/tehuti/tehuti.h +++ b/drivers/net/ethernet/tehuti/tehuti.h @@ -74,6 +74,9 @@ * ifcontig eth1 txqueuelen 3000 - to change it at runtime */ #define BDX_NDEV_TXQ_LEN 3000 +/* Max MTU for Jumbo Frame mode, per tehutinetworks.net Features FAQ is 16k */ +#define BDX_MAX_MTU (16 * 1024) + #define FIFO_SIZE 4096 #define FIFO_EXTRA_SPACE 1024 diff --git a/drivers/net/ethernet/ti/netcp_core.c b/drivers/net/ethernet/ti/netcp_core.c index 32516661f180..11609d5467fc 100644 --- a/drivers/net/ethernet/ti/netcp_core.c +++ b/drivers/net/ethernet/ti/netcp_core.c @@ -1766,21 +1766,6 @@ out: return (ret == 0) ? 0 : err; } -static int netcp_ndo_change_mtu(struct net_device *ndev, int new_mtu) -{ - struct netcp_intf *netcp = netdev_priv(ndev); - - /* MTU < 68 is an error for IPv4 traffic */ - if ((new_mtu < 68) || - (new_mtu > (NETCP_MAX_FRAME_SIZE - ETH_HLEN - ETH_FCS_LEN))) { - dev_err(netcp->ndev_dev, "Invalid mtu size = %d\n", new_mtu); - return -EINVAL; - } - - ndev->mtu = new_mtu; - return 0; -} - static void netcp_ndo_tx_timeout(struct net_device *ndev) { struct netcp_intf *netcp = netdev_priv(ndev); @@ -1886,7 +1871,6 @@ static const struct net_device_ops netcp_netdev_ops = { .ndo_start_xmit = netcp_ndo_start_xmit, .ndo_set_rx_mode = netcp_set_rx_mode, .ndo_do_ioctl = netcp_ndo_ioctl, - .ndo_change_mtu = netcp_ndo_change_mtu, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, .ndo_vlan_rx_add_vid = netcp_rx_add_vid, @@ -1923,6 +1907,10 @@ static int netcp_create_interface(struct netcp_device *netcp_device, ndev->hw_features = ndev->features; ndev->vlan_features |= NETIF_F_SG; + /* MTU range: 68 - 9486 */ + ndev->min_mtu = ETH_MIN_MTU; + ndev->max_mtu = NETCP_MAX_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN); + netcp = netdev_priv(ndev); spin_lock_init(&netcp->lock); INIT_LIST_HEAD(&netcp->module_head); diff --git a/drivers/net/ethernet/via/via-velocity.c b/drivers/net/ethernet/via/via-velocity.c index 908e72e18ef7..4716e60e2ccb 100644 --- a/drivers/net/ethernet/via/via-velocity.c +++ b/drivers/net/ethernet/via/via-velocity.c @@ -2284,13 +2284,6 @@ static int velocity_change_mtu(struct net_device *dev, int new_mtu) struct velocity_info *vptr = netdev_priv(dev); int ret = 0; - if ((new_mtu < VELOCITY_MIN_MTU) || new_mtu > (VELOCITY_MAX_MTU)) { - VELOCITY_PRT(MSG_LEVEL_ERR, KERN_NOTICE "%s: Invalid MTU.\n", - vptr->netdev->name); - ret = -EINVAL; - goto out_0; - } - if (!netif_running(dev)) { dev->mtu = new_mtu; goto out_0; @@ -2864,6 +2857,10 @@ static int velocity_probe(struct device *dev, int irq, NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_IP_CSUM; + /* MTU range: 64 - 9000 */ + netdev->min_mtu = VELOCITY_MIN_MTU; + netdev->max_mtu = VELOCITY_MAX_MTU; + ret = register_netdev(netdev); if (ret < 0) goto err_iounmap; |