Commit b7bfcb4c authored by Michael Chan's avatar Michael Chan Committed by Jakub Kicinski
Browse files

bnxt_en: Set TSO max segs on devices with limits 



Firmware will now advertise a non-zero TSO max segments if the
device has a limit.  0 means no limit.  The latest 5760X chip
(early revs) has a limit of 2047 that cannot be exceeded.  If
exceeded, the chip will send out just a small number of segments.

Call netif_set_tso_max_segs() if the device has a limit.

Fixes: 2012a6ab ("bnxt_en: Add 5760X (P7) PCI IDs")
Reviewed-by: default avatarAjit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: default avatarSomnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: default avatarMichael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20240618215313.29631-3-michael.chan@broadcom.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 8ad04409

drivers/net/ethernet/broadcom/bnxt/bnxt.c

+3 −0
Original line number Diff line number Diff line
@@ -8996,6 +8996,7 @@ static int __bnxt_hwrm_func_qcaps(struct bnxt *bp) 
		memcpy(vf->mac_addr, resp->mac_address, ETH_ALEN);

#endif

	}

	bp->tso_max_segs = le16_to_cpu(resp->max_tso_segs);



hwrm_func_qcaps_exit:

	hwrm_req_drop(bp, req);
@@ -15363,6 +15364,8 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 
	dev->priv_flags |= IFF_UNICAST_FLT;



	netif_set_tso_max_size(dev, GSO_MAX_SIZE);

	if (bp->tso_max_segs)

		netif_set_tso_max_segs(dev, bp->tso_max_segs);



	dev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |

			    NETDEV_XDP_ACT_RX_SG;

drivers/net/ethernet/broadcom/bnxt/bnxt.h

+1 −0
Original line number Diff line number Diff line
@@ -2318,6 +2318,7 @@ struct bnxt { 
	u8			rss_hash_key_updated:1;



	u16			max_mtu;

	u16			tso_max_segs;

	u8			max_tc;

	u8			max_lltc;	/* lossless TCs */

	struct bnxt_queue_info	q_info[BNXT_MAX_QUEUE];