diff options
| author | Raju Rangoju <Raju.Rangoju@amd.com> | 2025-07-01 17:49:29 +0530 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-07-02 14:50:07 -0700 |
| commit | 9e2a7ad4ae909d1ec0e1b1bde4ff67a75962c41b (patch) | |
| tree | 274df8cb775464229902426d2818f7919794e485 | |
| parent | 7d2dabaa1796e54d442c02b4d108336730982baf (diff) | |
amd-xgbe: add support for giant packet size
AMD XGBE hardware supports giant Ethernet frames up to 16K bytes.
Add support for configuring and enabling giant packet handling
in the driver.
- Define new register fields and macros for giant packet support.
- Update the jumbo frame configuration logic to enable giant
packet mode when MTU exceeds the jumbo threshold.
Acked-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250701121929.319690-1-Raju.Rangoju@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/amd/xgbe/xgbe-common.h | 8 | ||||
| -rw-r--r-- | drivers/net/ethernet/amd/xgbe/xgbe-dev.c | 16 | ||||
| -rw-r--r-- | drivers/net/ethernet/amd/xgbe/xgbe-main.c | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/amd/xgbe/xgbe.h | 2 |
4 files changed, 24 insertions, 4 deletions
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-common.h b/drivers/net/ethernet/amd/xgbe/xgbe-common.h index e1296cbf4ff3..734f44660620 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-common.h +++ b/drivers/net/ethernet/amd/xgbe/xgbe-common.h @@ -364,6 +364,10 @@ #define MAC_RCR_CST_WIDTH 1 #define MAC_RCR_DCRCC_INDEX 3 #define MAC_RCR_DCRCC_WIDTH 1 +#define MAC_RCR_GPSLCE_INDEX 6 +#define MAC_RCR_GPSLCE_WIDTH 1 +#define MAC_RCR_WD_INDEX 7 +#define MAC_RCR_WD_WIDTH 1 #define MAC_RCR_HDSMS_INDEX 12 #define MAC_RCR_HDSMS_WIDTH 3 #define MAC_RCR_IPC_INDEX 9 @@ -374,6 +378,8 @@ #define MAC_RCR_LM_WIDTH 1 #define MAC_RCR_RE_INDEX 0 #define MAC_RCR_RE_WIDTH 1 +#define MAC_RCR_GPSL_INDEX 16 +#define MAC_RCR_GPSL_WIDTH 14 #define MAC_RFCR_PFCE_INDEX 8 #define MAC_RFCR_PFCE_WIDTH 1 #define MAC_RFCR_RFE_INDEX 0 @@ -412,6 +418,8 @@ #define MAC_TCR_VNE_WIDTH 1 #define MAC_TCR_VNM_INDEX 25 #define MAC_TCR_VNM_WIDTH 1 +#define MAC_TCR_JD_INDEX 16 +#define MAC_TCR_JD_WIDTH 1 #define MAC_TIR_TNID_INDEX 0 #define MAC_TIR_TNID_WIDTH 16 #define MAC_TSCR_AV8021ASMEN_INDEX 28 diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c index 466b5f6e5578..9e4e79bfe624 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c @@ -2850,9 +2850,19 @@ static void xgbe_config_jumbo_enable(struct xgbe_prv_data *pdata) { unsigned int val; - val = (pdata->netdev->mtu > XGMAC_STD_PACKET_MTU) ? 1 : 0; - - XGMAC_IOWRITE_BITS(pdata, MAC_RCR, JE, val); + if (pdata->netdev->mtu > XGMAC_JUMBO_PACKET_MTU) { + XGMAC_IOWRITE_BITS(pdata, MAC_RCR, GPSL, + XGMAC_GIANT_PACKET_MTU); + XGMAC_IOWRITE_BITS(pdata, MAC_RCR, WD, 1); + XGMAC_IOWRITE_BITS(pdata, MAC_TCR, JD, 1); + XGMAC_IOWRITE_BITS(pdata, MAC_RCR, GPSLCE, 1); + } else { + val = pdata->netdev->mtu > XGMAC_STD_PACKET_MTU ? 1 : 0; + XGMAC_IOWRITE_BITS(pdata, MAC_RCR, GPSLCE, 0); + XGMAC_IOWRITE_BITS(pdata, MAC_RCR, WD, 0); + XGMAC_IOWRITE_BITS(pdata, MAC_TCR, JD, 0); + XGMAC_IOWRITE_BITS(pdata, MAC_RCR, JE, val); + } } static void xgbe_config_mac_speed(struct xgbe_prv_data *pdata) diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-main.c b/drivers/net/ethernet/amd/xgbe/xgbe-main.c index 4ebdd123c435..d1f0419edb23 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-main.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-main.c @@ -275,7 +275,7 @@ int xgbe_config_netdev(struct xgbe_prv_data *pdata) netdev->priv_flags |= IFF_UNICAST_FLT; netdev->min_mtu = 0; - netdev->max_mtu = XGMAC_JUMBO_PACKET_MTU; + netdev->max_mtu = XGMAC_GIANT_PACKET_MTU - XGBE_ETH_FRAME_HDR; /* Use default watchdog timeout */ netdev->watchdog_timeo = 0; diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h index 6359bb87dc13..29b42e7ab6cf 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe.h +++ b/drivers/net/ethernet/amd/xgbe/xgbe.h @@ -80,11 +80,13 @@ #define XGBE_IRQ_MODE_EDGE 0 #define XGBE_IRQ_MODE_LEVEL 1 +#define XGBE_ETH_FRAME_HDR (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN) #define XGMAC_MIN_PACKET 60 #define XGMAC_STD_PACKET_MTU 1500 #define XGMAC_MAX_STD_PACKET 1518 #define XGMAC_JUMBO_PACKET_MTU 9000 #define XGMAC_MAX_JUMBO_PACKET 9018 +#define XGMAC_GIANT_PACKET_MTU 16368 #define XGMAC_ETH_PREAMBLE (12 + 8) /* Inter-frame gap + preamble */ #define XGMAC_PFC_DATA_LEN 46 |