Commit 2e5010fd authored by Ronak Doshi's avatar Ronak Doshi Committed by Jakub Kicinski
Browse files

vmxnet3: add command to allow disabling of offloads 



This patch adds a new command to disable certain offloads. This
allows user to specify, using VM configuration, if certain offloads
need to be disabled.

Signed-off-by: default avatarRonak Doshi <ronak.doshi@broadcom.com>
Acked-by: default avatarGuolin Yang <guolin.yang@broadcom.com>
Reviewed-by: default avatarSimon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240531193050.4132-4-ronak.doshi@broadcom.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 4c22fad7

drivers/net/vmxnet3/vmxnet3_defs.h

+4 −0
Original line number Diff line number Diff line
@@ -126,6 +126,7 @@ enum { 
	VMXNET3_CMD_GET_MAX_CAPABILITIES,

	VMXNET3_CMD_GET_DCR0_REG,

	VMXNET3_CMD_GET_TSRING_DESC_SIZE,

	VMXNET3_CMD_GET_DISABLED_OFFLOADS,

};



/*
@@ -912,4 +913,7 @@ struct Vmxnet3_DriverShared { 
/* when new capability is introduced, update VMXNET3_CAP_MAX */

#define VMXNET3_CAP_MAX                            VMXNET3_CAP_VERSION_7_MAX



#define VMXNET3_OFFLOAD_TSO         BIT(0)

#define VMXNET3_OFFLOAD_LRO         BIT(1)



#endif /* _VMXNET3_DEFS_H_ */

drivers/net/vmxnet3/vmxnet3_drv.c

+19 −0
Original line number Diff line number Diff line
@@ -3645,6 +3645,15 @@ static void 
vmxnet3_declare_features(struct vmxnet3_adapter *adapter)

{

	struct net_device *netdev = adapter->netdev;

	unsigned long flags;



	if (VMXNET3_VERSION_GE_9(adapter)) {

		spin_lock_irqsave(&adapter->cmd_lock, flags);

		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,

				       VMXNET3_CMD_GET_DISABLED_OFFLOADS);

		adapter->disabledOffloads = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);

		spin_unlock_irqrestore(&adapter->cmd_lock, flags);

	}



	netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |

		NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX |
@@ -3662,6 +3671,16 @@ vmxnet3_declare_features(struct vmxnet3_adapter *adapter) 
			NETIF_F_GSO_UDP_TUNNEL_CSUM;

	}



	if (adapter->disabledOffloads & VMXNET3_OFFLOAD_TSO) {

		netdev->hw_features &= ~(NETIF_F_TSO | NETIF_F_TSO6);

		netdev->hw_enc_features &= ~(NETIF_F_TSO | NETIF_F_TSO6);

	}



	if (adapter->disabledOffloads & VMXNET3_OFFLOAD_LRO) {

		netdev->hw_features &= ~(NETIF_F_LRO);

		netdev->hw_enc_features &= ~(NETIF_F_LRO);

	}



	if (VMXNET3_VERSION_GE_7(adapter)) {

		unsigned long flags;

drivers/net/vmxnet3/vmxnet3_int.h

+1 −0
Original line number Diff line number Diff line
@@ -454,6 +454,7 @@ struct vmxnet3_adapter { 
	/* Size of buffer in the ts ring */

	u16     tx_ts_desc_size;

	u16     rx_ts_desc_size;

	u32     disabledOffloads;

};



#define VMXNET3_WRITE_BAR0_REG(adapter, reg, val)  \