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amd-xgbe: Fix to ensure dependent features are toggled with RX checksum offload

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commit f04dd30f1bef1ed2e74a4050af6e5e5e3869bac3 upstream.

According to the XGMAC specification, enabling features such as Layer 3
and Layer 4 Packet Filtering, Split Header and Virtualized Network support
automatically selects the IPC Full Checksum Offload Engine on the receive
side.

When RX checksum offload is disabled, these dependent features must also
be disabled to prevent abnormal behavior caused by mismatched feature
dependencies.

Ensure that toggling RX checksum offload (disabling or enabling) properly
disables or enables all dependent features, maintaining consistent and
expected behavior in the network device.

Cc: stable@vger.kernel.org
Fixes: 1a510ccf58 ("amd-xgbe: Add support for VXLAN offload capabilities")
Signed-off-by: Vishal Badole <Vishal.Badole@amd.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250424130248.428865-1-Vishal.Badole@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vishal Badole
2025-04-24 18:32:48 +05:30
committed by Greg Kroah-Hartman
parent 34b6fa1143
commit e51dd71266
4 changed files with 42 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/net/ethernet/amd/xgbe/xgbe-desc.c
View File

@@ -373,8 +373,13 @@ static int xgbe_map_rx_buffer(struct xgbe_prv_data *pdata,
}
/* Set up the header page info */
xgbe_set_buffer_data(&rdata->rx.hdr, &ring->rx_hdr_pa,
XGBE_SKB_ALLOC_SIZE);
if (pdata->netdev->features & NETIF_F_RXCSUM) {
xgbe_set_buffer_data(&rdata->rx.hdr, &ring->rx_hdr_pa,
XGBE_SKB_ALLOC_SIZE);
} else {
xgbe_set_buffer_data(&rdata->rx.hdr, &ring->rx_hdr_pa,
pdata->rx_buf_size);
}
/* Set up the buffer page info */
xgbe_set_buffer_data(&rdata->rx.buf, &ring->rx_buf_pa,

24
drivers/net/ethernet/amd/xgbe/xgbe-dev.c
View File

@@ -320,6 +320,18 @@ static void xgbe_config_sph_mode(struct xgbe_prv_data *pdata)
XGMAC_IOWRITE_BITS(pdata, MAC_RCR, HDSMS, XGBE_SPH_HDSMS_SIZE);
}
static void xgbe_disable_sph_mode(struct xgbe_prv_data *pdata)
{
unsigned int i;
for (i = 0; i < pdata->channel_count; i++) {
if (!pdata->channel[i]->rx_ring)
break;
XGMAC_DMA_IOWRITE_BITS(pdata->channel[i], DMA_CH_CR, SPH, 0);
}
}
static int xgbe_write_rss_reg(struct xgbe_prv_data *pdata, unsigned int type,
unsigned int index, unsigned int val)
{
@@ -3545,8 +3557,12 @@ static int xgbe_init(struct xgbe_prv_data *pdata)
xgbe_config_tx_coalesce(pdata);
xgbe_config_rx_buffer_size(pdata);
xgbe_config_tso_mode(pdata);
xgbe_config_sph_mode(pdata);
xgbe_config_rss(pdata);
if (pdata->netdev->features & NETIF_F_RXCSUM) {
xgbe_config_sph_mode(pdata);
xgbe_config_rss(pdata);
}
desc_if->wrapper_tx_desc_init(pdata);
desc_if->wrapper_rx_desc_init(pdata);
xgbe_enable_dma_interrupts(pdata);
@@ -3702,5 +3718,9 @@ void xgbe_init_function_ptrs_dev(struct xgbe_hw_if *hw_if)
hw_if->disable_vxlan = xgbe_disable_vxlan;
hw_if->set_vxlan_id = xgbe_set_vxlan_id;
/* For Split Header*/
hw_if->enable_sph = xgbe_config_sph_mode;
hw_if->disable_sph = xgbe_disable_sph_mode;
DBGPR("<--xgbe_init_function_ptrs\n");
}

11
drivers/net/ethernet/amd/xgbe/xgbe-drv.c
View File

@@ -2257,10 +2257,17 @@ static int xgbe_set_features(struct net_device *netdev,
if (ret)
return ret;
if ((features & NETIF_F_RXCSUM) && !rxcsum)
if ((features & NETIF_F_RXCSUM) && !rxcsum) {
hw_if->enable_sph(pdata);
hw_if->enable_vxlan(pdata);
hw_if->enable_rx_csum(pdata);
else if (!(features & NETIF_F_RXCSUM) && rxcsum)
schedule_work(&pdata->restart_work);
} else if (!(features & NETIF_F_RXCSUM) && rxcsum) {
hw_if->disable_sph(pdata);
hw_if->disable_vxlan(pdata);
hw_if->disable_rx_csum(pdata);
schedule_work(&pdata->restart_work);
}
if ((features & NETIF_F_HW_VLAN_CTAG_RX) && !rxvlan)
hw_if->enable_rx_vlan_stripping(pdata);

4
drivers/net/ethernet/amd/xgbe/xgbe.h
View File

@@ -865,6 +865,10 @@ struct xgbe_hw_if {
void (*enable_vxlan)(struct xgbe_prv_data *);
void (*disable_vxlan)(struct xgbe_prv_data *);
void (*set_vxlan_id)(struct xgbe_prv_data *);
/* For Split Header */
void (*enable_sph)(struct xgbe_prv_data *pdata);
void (*disable_sph)(struct xgbe_prv_data *pdata);
};
/* This structure represents implementation specific routines for an