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vmxnet3: add command to allow disabling of offloads

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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: Ronak Doshi <ronak.doshi@broadcom.com>
Acked-by: Guolin Yang <guolin.yang@broadcom.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240531193050.4132-4-ronak.doshi@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ronak Doshi 2024-05-31 12:30:48 -07:00 committed by Jakub Kicinski
parent 4c22fad702
commit 2e5010fd0c
3 changed files with 24 additions and 0 deletions
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4
drivers/net/vmxnet3/vmxnet3_defs.h
View File

@ -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_ */

19
drivers/net/vmxnet3/vmxnet3_drv.c
View File

@ -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;

1
drivers/net/vmxnet3/vmxnet3_int.h
View File

@ -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) \