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Date: Mon, 17 Oct 2016 15:54:04 -0400
From: Jarod Wilson <jarod@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Jarod Wilson <jarod@...hat.com>, netdev@...r.kernel.org,
Michael Chan <michael.chan@...adcom.com>,
Sony Chacko <sony.chacko@...gic.com>,
Ariel Elior <ariel.elior@...gic.com>,
Dept-HSGLinuxNICDev@...gic.com,
Siva Reddy Kallam <siva.kallam@...adcom.com>,
Prashant Sreedharan <prashant@...adcom.com>
Subject: [PATCH net-next 02/15] ethernet/broadcom: use core min/max MTU checking
tg3: min_mtu 60, max_mtu 9000/1500
bnxt: min_mtu 60, max_mtu 9000
bnx2x: min_mtu 46, max_mtu 9600
- Fix up ETH_OVREHEAD -> ETH_OVERHEAD while we're in here, remove
duplicated defines from bnx2x_link.c.
bnx2: min_mtu 46, max_mtu 9000
- Use more standard ETH_* defines while we're at it.
bcm63xx_enet: min_mtu 46, max_mtu 2028
- compute_hw_mtu was made largely pointless, and thus merged back into
bcm_enet_change_mtu.
b44: min_mtu 60, max_mtu 1500
CC: netdev@...r.kernel.org
CC: Michael Chan <michael.chan@...adcom.com>
CC: Sony Chacko <sony.chacko@...gic.com>
CC: Ariel Elior <ariel.elior@...gic.com>
CC: Dept-HSGLinuxNICDev@...gic.com
CC: Siva Reddy Kallam <siva.kallam@...adcom.com>
CC: Prashant Sreedharan <prashant@...adcom.com>
Signed-off-by: Jarod Wilson <jarod@...hat.com>
---
drivers/net/ethernet/broadcom/b44.c | 9 +++---
drivers/net/ethernet/broadcom/bcm63xx_enet.c | 35 ++++++++----------------
drivers/net/ethernet/broadcom/bnx2.c | 16 +++++------
drivers/net/ethernet/broadcom/bnx2.h | 6 ++--
drivers/net/ethernet/broadcom/bnx2x/bnx2x.h | 6 ++--
drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c | 8 +-----
drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c | 22 ++++++---------
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c | 7 +++--
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 7 +++--
drivers/net/ethernet/broadcom/tg3.c | 9 +++---
10 files changed, 51 insertions(+), 74 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/b44.c b/drivers/net/ethernet/broadcom/b44.c
index 17aa33c..1df3048 100644
--- a/drivers/net/ethernet/broadcom/b44.c
+++ b/drivers/net/ethernet/broadcom/b44.c
@@ -59,8 +59,8 @@
#define B44_TX_TIMEOUT (5 * HZ)
/* hardware minimum and maximum for a single frame's data payload */
-#define B44_MIN_MTU 60
-#define B44_MAX_MTU 1500
+#define B44_MIN_MTU ETH_ZLEN
+#define B44_MAX_MTU ETH_DATA_LEN
#define B44_RX_RING_SIZE 512
#define B44_DEF_RX_RING_PENDING 200
@@ -1064,9 +1064,6 @@ static int b44_change_mtu(struct net_device *dev, int new_mtu)
{
struct b44 *bp = netdev_priv(dev);
- if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
- return -EINVAL;
-
if (!netif_running(dev)) {
/* We'll just catch it later when the
* device is up'd.
@@ -2377,6 +2374,8 @@ static int b44_init_one(struct ssb_device *sdev,
dev->netdev_ops = &b44_netdev_ops;
netif_napi_add(dev, &bp->napi, b44_poll, 64);
dev->watchdog_timeo = B44_TX_TIMEOUT;
+ dev->min_mtu = B44_MIN_MTU;
+ dev->max_mtu = B44_MAX_MTU;
dev->irq = sdev->irq;
dev->ethtool_ops = &b44_ethtool_ops;
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index ae364c7..7e513ca 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -1622,20 +1622,19 @@ static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
}
/*
- * calculate actual hardware mtu
+ * adjust mtu, can't be called while device is running
*/
-static int compute_hw_mtu(struct bcm_enet_priv *priv, int mtu)
+static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
{
- int actual_mtu;
+ struct bcm_enet_priv *priv = netdev_priv(dev);
+ int actual_mtu = new_mtu;
- actual_mtu = mtu;
+ if (netif_running(dev))
+ return -EBUSY;
/* add ethernet header + vlan tag size */
actual_mtu += VLAN_ETH_HLEN;
- if (actual_mtu < 64 || actual_mtu > BCMENET_MAX_MTU)
- return -EINVAL;
-
/*
* setup maximum size before we get overflow mark in
* descriptor, note that this will not prevent reception of
@@ -1650,22 +1649,7 @@ static int compute_hw_mtu(struct bcm_enet_priv *priv, int mtu)
*/
priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
priv->dma_maxburst * 4);
- return 0;
-}
-/*
- * adjust mtu, can't be called while device is running
- */
-static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
-{
- int ret;
-
- if (netif_running(dev))
- return -EBUSY;
-
- ret = compute_hw_mtu(netdev_priv(dev), new_mtu);
- if (ret)
- return ret;
dev->mtu = new_mtu;
return 0;
}
@@ -1755,7 +1739,7 @@ static int bcm_enet_probe(struct platform_device *pdev)
priv->enet_is_sw = false;
priv->dma_maxburst = BCMENET_DMA_MAXBURST;
- ret = compute_hw_mtu(priv, dev->mtu);
+ ret = bcm_enet_change_mtu(dev, dev->mtu);
if (ret)
goto out;
@@ -1888,6 +1872,9 @@ static int bcm_enet_probe(struct platform_device *pdev)
netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
dev->ethtool_ops = &bcm_enet_ethtool_ops;
+ /* MTU range: 46 - 2028 */
+ dev->min_mtu = ETH_ZLEN - ETH_HLEN;
+ dev->max_mtu = BCMENET_MAX_MTU - VLAN_ETH_HLEN;
SET_NETDEV_DEV(dev, &pdev->dev);
ret = register_netdev(dev);
@@ -2742,7 +2729,7 @@ static int bcm_enetsw_probe(struct platform_device *pdev)
priv->dma_chan_width = pd->dma_chan_width;
}
- ret = compute_hw_mtu(priv, dev->mtu);
+ ret = bcm_enet_change_mtu(dev, dev->mtu);
if (ret)
goto out;
diff --git a/drivers/net/ethernet/broadcom/bnx2.c b/drivers/net/ethernet/broadcom/bnx2.c
index 27f11a5..2a5df3f 100644
--- a/drivers/net/ethernet/broadcom/bnx2.c
+++ b/drivers/net/ethernet/broadcom/bnx2.c
@@ -2298,7 +2298,7 @@ bnx2_init_5706s_phy(struct bnx2 *bp, int reset_phy)
if (BNX2_CHIP(bp) == BNX2_CHIP_5706)
BNX2_WR(bp, BNX2_MISC_GP_HW_CTL0, 0x300);
- if (bp->dev->mtu > 1500) {
+ if (bp->dev->mtu > ETH_DATA_LEN) {
u32 val;
/* Set extended packet length bit */
@@ -2352,7 +2352,7 @@ bnx2_init_copper_phy(struct bnx2 *bp, int reset_phy)
bnx2_write_phy(bp, MII_BNX2_DSP_RW_PORT, val);
}
- if (bp->dev->mtu > 1500) {
+ if (bp->dev->mtu > ETH_DATA_LEN) {
/* Set extended packet length bit */
bnx2_write_phy(bp, 0x18, 0x7);
bnx2_read_phy(bp, 0x18, &val);
@@ -4985,12 +4985,12 @@ bnx2_init_chip(struct bnx2 *bp)
/* Program the MTU. Also include 4 bytes for CRC32. */
mtu = bp->dev->mtu;
val = mtu + ETH_HLEN + ETH_FCS_LEN;
- if (val > (MAX_ETHERNET_PACKET_SIZE + 4))
+ if (val > (MAX_ETHERNET_PACKET_SIZE + ETH_HLEN + 4))
val |= BNX2_EMAC_RX_MTU_SIZE_JUMBO_ENA;
BNX2_WR(bp, BNX2_EMAC_RX_MTU_SIZE, val);
- if (mtu < 1500)
- mtu = 1500;
+ if (mtu < ETH_DATA_LEN)
+ mtu = ETH_DATA_LEN;
bnx2_reg_wr_ind(bp, BNX2_RBUF_CONFIG, BNX2_RBUF_CONFIG_VAL(mtu));
bnx2_reg_wr_ind(bp, BNX2_RBUF_CONFIG2, BNX2_RBUF_CONFIG2_VAL(mtu));
@@ -7896,10 +7896,6 @@ bnx2_change_mtu(struct net_device *dev, int new_mtu)
{
struct bnx2 *bp = netdev_priv(dev);
- if (((new_mtu + ETH_HLEN) > MAX_ETHERNET_JUMBO_PACKET_SIZE) ||
- ((new_mtu + ETH_HLEN) < MIN_ETHERNET_PACKET_SIZE))
- return -EINVAL;
-
dev->mtu = new_mtu;
return bnx2_change_ring_size(bp, bp->rx_ring_size, bp->tx_ring_size,
false);
@@ -8589,6 +8585,8 @@ bnx2_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
dev->features |= dev->hw_features;
dev->priv_flags |= IFF_UNICAST_FLT;
+ dev->min_mtu = MIN_ETHERNET_PACKET_SIZE;
+ dev->max_mtu = MAX_ETHERNET_JUMBO_PACKET_SIZE;
if (!(bp->flags & BNX2_FLAG_CAN_KEEP_VLAN))
dev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
diff --git a/drivers/net/ethernet/broadcom/bnx2.h b/drivers/net/ethernet/broadcom/bnx2.h
index 380234d..a09ec47 100644
--- a/drivers/net/ethernet/broadcom/bnx2.h
+++ b/drivers/net/ethernet/broadcom/bnx2.h
@@ -6530,9 +6530,9 @@ struct l2_fhdr {
#define MII_BNX2_AER_AER_AN_MMD 0x3800
#define MII_BNX2_BLK_ADDR_COMBO_IEEEB0 0xffe0
-#define MIN_ETHERNET_PACKET_SIZE 60
-#define MAX_ETHERNET_PACKET_SIZE 1514
-#define MAX_ETHERNET_JUMBO_PACKET_SIZE 9014
+#define MIN_ETHERNET_PACKET_SIZE (ETH_ZLEN - ETH_HLEN)
+#define MAX_ETHERNET_PACKET_SIZE ETH_DATA_LEN
+#define MAX_ETHERNET_JUMBO_PACKET_SIZE 9000
#define BNX2_RX_COPY_THRESH 128
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
index 7dd7490..0a23034 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
@@ -1396,9 +1396,9 @@ struct bnx2x {
int tx_ring_size;
/* L2 header size + 2*VLANs (8 bytes) + LLC SNAP (8 bytes) */
-#define ETH_OVREHEAD (ETH_HLEN + 8 + 8)
-#define ETH_MIN_PACKET_SIZE 60
-#define ETH_MAX_PACKET_SIZE 1500
+#define ETH_OVERHEAD (ETH_HLEN + 8 + 8)
+#define ETH_MIN_PACKET_SIZE (ETH_ZLEN - ETH_HLEN)
+#define ETH_MAX_PACKET_SIZE ETH_DATA_LEN
#define ETH_MAX_JUMBO_PACKET_SIZE 9600
/* TCP with Timestamp Option (32) + IPv6 (40) */
#define ETH_MAX_TPA_HEADER_SIZE 72
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
index 0a9108c..ed42c10 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
@@ -2023,7 +2023,7 @@ static void bnx2x_set_rx_buf_size(struct bnx2x *bp)
mtu = bp->dev->mtu;
fp->rx_buf_size = BNX2X_FW_RX_ALIGN_START +
IP_HEADER_ALIGNMENT_PADDING +
- ETH_OVREHEAD +
+ ETH_OVERHEAD +
mtu +
BNX2X_FW_RX_ALIGN_END;
/* Note : rx_buf_size doesn't take into account NET_SKB_PAD */
@@ -4855,12 +4855,6 @@ int bnx2x_change_mtu(struct net_device *dev, int new_mtu)
return -EAGAIN;
}
- if ((new_mtu > ETH_MAX_JUMBO_PACKET_SIZE) ||
- ((new_mtu + ETH_HLEN) < ETH_MIN_PACKET_SIZE)) {
- BNX2X_ERR("Can't support requested MTU size\n");
- return -EINVAL;
- }
-
/* This does not race with packet allocation
* because the actual alloc size is
* only updated as part of load
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c
index 1fb8010..05356ef 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c
@@ -34,12 +34,6 @@ typedef int (*read_sfp_module_eeprom_func_p)(struct bnx2x_phy *phy,
u8 dev_addr, u16 addr, u8 byte_cnt,
u8 *o_buf, u8);
/********************************************************/
-#define ETH_HLEN 14
-/* L2 header size + 2*VLANs (8 bytes) + LLC SNAP (8 bytes) */
-#define ETH_OVREHEAD (ETH_HLEN + 8 + 8)
-#define ETH_MIN_PACKET_SIZE 60
-#define ETH_MAX_PACKET_SIZE 1500
-#define ETH_MAX_JUMBO_PACKET_SIZE 9600
#define MDIO_ACCESS_TIMEOUT 1000
#define WC_LANE_MAX 4
#define I2C_SWITCH_WIDTH 2
@@ -1917,7 +1911,7 @@ static int bnx2x_emac_enable(struct link_params *params,
/* Enable emac for jumbo packets */
EMAC_WR(bp, EMAC_REG_EMAC_RX_MTU_SIZE,
(EMAC_RX_MTU_SIZE_JUMBO_ENA |
- (ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVREHEAD)));
+ (ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVERHEAD)));
/* Strip CRC */
REG_WR(bp, NIG_REG_NIG_INGRESS_EMAC0_NO_CRC + port*4, 0x1);
@@ -2314,19 +2308,19 @@ static int bnx2x_bmac1_enable(struct link_params *params,
REG_WR_DMAE(bp, bmac_addr + BIGMAC_REGISTER_BMAC_CONTROL, wb_data, 2);
/* Set rx mtu */
- wb_data[0] = ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVREHEAD;
+ wb_data[0] = ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVERHEAD;
wb_data[1] = 0;
REG_WR_DMAE(bp, bmac_addr + BIGMAC_REGISTER_RX_MAX_SIZE, wb_data, 2);
bnx2x_update_pfc_bmac1(params, vars);
/* Set tx mtu */
- wb_data[0] = ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVREHEAD;
+ wb_data[0] = ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVERHEAD;
wb_data[1] = 0;
REG_WR_DMAE(bp, bmac_addr + BIGMAC_REGISTER_TX_MAX_SIZE, wb_data, 2);
/* Set cnt max size */
- wb_data[0] = ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVREHEAD;
+ wb_data[0] = ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVERHEAD;
wb_data[1] = 0;
REG_WR_DMAE(bp, bmac_addr + BIGMAC_REGISTER_CNT_MAX_SIZE, wb_data, 2);
@@ -2384,18 +2378,18 @@ static int bnx2x_bmac2_enable(struct link_params *params,
udelay(30);
/* Set RX MTU */
- wb_data[0] = ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVREHEAD;
+ wb_data[0] = ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVERHEAD;
wb_data[1] = 0;
REG_WR_DMAE(bp, bmac_addr + BIGMAC2_REGISTER_RX_MAX_SIZE, wb_data, 2);
udelay(30);
/* Set TX MTU */
- wb_data[0] = ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVREHEAD;
+ wb_data[0] = ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVERHEAD;
wb_data[1] = 0;
REG_WR_DMAE(bp, bmac_addr + BIGMAC2_REGISTER_TX_MAX_SIZE, wb_data, 2);
udelay(30);
/* Set cnt max size */
- wb_data[0] = ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVREHEAD - 2;
+ wb_data[0] = ETH_MAX_JUMBO_PACKET_SIZE + ETH_OVERHEAD - 2;
wb_data[1] = 0;
REG_WR_DMAE(bp, bmac_addr + BIGMAC2_REGISTER_CNT_MAX_SIZE, wb_data, 2);
udelay(30);
@@ -2516,7 +2510,7 @@ static int bnx2x_pbf_update(struct link_params *params, u32 flow_ctrl,
} else {
u32 thresh = (ETH_MAX_JUMBO_PACKET_SIZE +
- ETH_OVREHEAD)/16;
+ ETH_OVERHEAD)/16;
REG_WR(bp, PBF_REG_P0_PAUSE_ENABLE + port*4, 0);
/* Update threshold */
REG_WR(bp, PBF_REG_P0_ARB_THRSH + port*4, thresh);
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index 20fe6a8..67b6180 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -12080,8 +12080,7 @@ static int bnx2x_get_hwinfo(struct bnx2x *bp)
mtu_size, mtu);
/* if valid: update device mtu */
- if (((mtu_size + ETH_HLEN) >=
- ETH_MIN_PACKET_SIZE) &&
+ if ((mtu_size >= ETH_MIN_PACKET_SIZE) &&
(mtu_size <=
ETH_MAX_JUMBO_PACKET_SIZE))
bp->dev->mtu = mtu_size;
@@ -13315,6 +13314,10 @@ static int bnx2x_init_dev(struct bnx2x *bp, struct pci_dev *pdev,
dev->dcbnl_ops = &bnx2x_dcbnl_ops;
#endif
+ /* MTU range, 46 - 9600 */
+ dev->min_mtu = ETH_MIN_PACKET_SIZE;
+ dev->max_mtu = ETH_MAX_JUMBO_PACKET_SIZE;
+
/* get_port_hwinfo() will set prtad and mmds properly */
bp->mdio.prtad = MDIO_PRTAD_NONE;
bp->mdio.mmds = 0;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index a9f9f37..a042da1 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6290,9 +6290,6 @@ static int bnxt_change_mtu(struct net_device *dev, int new_mtu)
{
struct bnxt *bp = netdev_priv(dev);
- if (new_mtu < 60 || new_mtu > 9500)
- return -EINVAL;
-
if (netif_running(dev))
bnxt_close_nic(bp, false, false);
@@ -6870,6 +6867,10 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
dev->features |= dev->hw_features | NETIF_F_HIGHDMA;
dev->priv_flags |= IFF_UNICAST_FLT;
+ /* MTU range: 60 - 9500 */
+ dev->min_mtu = ETH_ZLEN;
+ dev->max_mtu = 9500;
+
#ifdef CONFIG_BNXT_SRIOV
init_waitqueue_head(&bp->sriov_cfg_wait);
#endif
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index a927a73..185e9e0 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -124,7 +124,7 @@ static inline void _tg3_flag_clear(enum TG3_FLAGS flag, unsigned long *bits)
#define TG3_TX_TIMEOUT (5 * HZ)
/* hardware minimum and maximum for a single frame's data payload */
-#define TG3_MIN_MTU 60
+#define TG3_MIN_MTU ETH_ZLEN
#define TG3_MAX_MTU(tp) \
(tg3_flag(tp, JUMBO_CAPABLE) ? 9000 : 1500)
@@ -14199,9 +14199,6 @@ static int tg3_change_mtu(struct net_device *dev, int new_mtu)
int err;
bool reset_phy = false;
- if (new_mtu < TG3_MIN_MTU || new_mtu > TG3_MAX_MTU(tp))
- return -EINVAL;
-
if (!netif_running(dev)) {
/* We'll just catch it later when the
* device is up'd.
@@ -17799,6 +17796,10 @@ static int tg3_init_one(struct pci_dev *pdev,
dev->hw_features |= features;
dev->priv_flags |= IFF_UNICAST_FLT;
+ /* MTU range: 60 - 9000 or 1500, depending on hardware */
+ dev->min_mtu = TG3_MIN_MTU;
+ dev->max_mtu = TG3_MAX_MTU(tp);
+
if (tg3_chip_rev_id(tp) == CHIPREV_ID_5705_A1 &&
!tg3_flag(tp, TSO_CAPABLE) &&
!(tr32(TG3PCI_PCISTATE) & PCISTATE_BUS_SPEED_HIGH)) {
--
2.10.0
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