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bnxt_en: Check maximum supported MTU from firmware. 

Some NICs have a firmware enforced maximum MTU setting by management
firmware.  Set up netdev->max_mtu accordingly.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2017-10-26 11:51:25 -04:00 committed by David S. Miller
parent c1a7bdff17
commit 7eb9bb3a0c
2 changed files with 12 additions and 6 deletions
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17
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -2835,7 +2835,8 @@ int bnxt_set_rx_skb_mode(struct bnxt *bp, bool page_mode)
if (page_mode) {
if (bp->dev->mtu > BNXT_MAX_PAGE_MODE_MTU)
return -EOPNOTSUPP;
bp->dev->max_mtu = BNXT_MAX_PAGE_MODE_MTU;
bp->dev->max_mtu =
min_t(u16, bp->max_mtu, BNXT_MAX_PAGE_MODE_MTU);
bp->flags &= ~BNXT_FLAG_AGG_RINGS;
bp->flags |= BNXT_FLAG_NO_AGG_RINGS | BNXT_FLAG_RX_PAGE_MODE;
bp->dev->hw_features &= ~NETIF_F_LRO;
@ -2843,7 +2844,7 @@ int bnxt_set_rx_skb_mode(struct bnxt *bp, bool page_mode)
bp->rx_dir = DMA_BIDIRECTIONAL;
bp->rx_skb_func = bnxt_rx_page_skb;
} else {
bp->dev->max_mtu = BNXT_MAX_MTU;
bp->dev->max_mtu = bp->max_mtu;
bp->flags &= ~BNXT_FLAG_RX_PAGE_MODE;
bp->rx_dir = DMA_FROM_DEVICE;
bp->rx_skb_func = bnxt_rx_skb;
@ -4732,6 +4733,10 @@ static int bnxt_hwrm_func_qcfg(struct bnxt *bp)
else
bp->br_mode = BRIDGE_MODE_UNDEF;
bp->max_mtu = le16_to_cpu(resp->max_mtu_configured);
if (!bp->max_mtu)
bp->max_mtu = BNXT_MAX_MTU;
func_qcfg_exit:
mutex_unlock(&bp->hwrm_cmd_lock);
return rc;
@ -8095,10 +8100,6 @@ 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 = BNXT_MAX_MTU;
#ifdef CONFIG_BNXT_SRIOV
init_waitqueue_head(&bp->sriov_cfg_wait);
mutex_init(&bp->sriov_lock);
@ -8146,6 +8147,10 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
bnxt_ethtool_init(bp);
bnxt_dcb_init(bp);
/* MTU range: 60 - FW defined max */
dev->min_mtu = ETH_ZLEN;
dev->max_mtu = bp->max_mtu;
rc = bnxt_probe_phy(bp);
if (rc)
goto init_err_pci_clean;

1
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@ -1172,6 +1172,7 @@ struct bnxt {
int nr_vnics;
u32 rss_hash_cfg;
u16 max_mtu;
u8 max_tc;
u8 max_lltc; /* lossless TCs */
struct bnxt_queue_info q_info[BNXT_MAX_QUEUE];