From 529f1f652e3c3c6db6ab5a6e3a35469ddfd9575d Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Sun, 24 Jan 2016 21:17:10 -0800 Subject: [PATCH] i40e/i40evf: Add exception handling for Tx checksum Add exception handling to the Tx checksum path so that we can handle cases of TSO where the frame is bad, or Tx checksum where we didn't recognize a protocol Drop I40E_TX_FLAGS_CSUM as it is unused, move the CHECKSUM_PARTIAL check into the function itself so that we can decrease indent. Signed-off-by: Alexander Duyck Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 34 +++++++++++------- drivers/net/ethernet/intel/i40e/i40e_txrx.h | 1 - drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 35 ++++++++++++------- drivers/net/ethernet/intel/i40evf/i40e_txrx.h | 1 - 4 files changed, 45 insertions(+), 26 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index 5b591b865fd5..6b08b0fa6dcf 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -2387,10 +2387,10 @@ static int i40e_tsyn(struct i40e_ring *tx_ring, struct sk_buff *skb, * @tx_ring: Tx descriptor ring * @cd_tunneling: ptr to context desc bits **/ -static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, - u32 *td_cmd, u32 *td_offset, - struct i40e_ring *tx_ring, - u32 *cd_tunneling) +static int i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, + u32 *td_cmd, u32 *td_offset, + struct i40e_ring *tx_ring, + u32 *cd_tunneling) { union { struct iphdr *v4; @@ -2407,6 +2407,9 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, __be16 frag_off; u8 l4_proto = 0; + if (skb->ip_summed != CHECKSUM_PARTIAL) + return 0; + ip.hdr = skb_network_header(skb); l4.hdr = skb_transport_header(skb); @@ -2449,7 +2452,11 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, *tx_flags |= I40E_TX_FLAGS_UDP_TUNNEL; break; default: - return; + if (*tx_flags & I40E_TX_FLAGS_TSO) + return -1; + + skb_checksum_help(skb); + return 0; } /* compute tunnel header size */ @@ -2513,11 +2520,16 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT; break; default: - break; + if (*tx_flags & I40E_TX_FLAGS_TSO) + return -1; + skb_checksum_help(skb); + return 0; } *td_cmd |= cmd; *td_offset |= offset; + + return 1; } /** @@ -2954,12 +2966,10 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb, td_cmd |= I40E_TX_DESC_CMD_ICRC; /* Always offload the checksum, since it's in the data descriptor */ - if (skb->ip_summed == CHECKSUM_PARTIAL) { - tx_flags |= I40E_TX_FLAGS_CSUM; - - i40e_tx_enable_csum(skb, &tx_flags, &td_cmd, &td_offset, - tx_ring, &cd_tunneling); - } + tso = i40e_tx_enable_csum(skb, &tx_flags, &td_cmd, &td_offset, + tx_ring, &cd_tunneling); + if (tso < 0) + goto out_drop; i40e_create_tx_ctx(tx_ring, cd_type_cmd_tso_mss, cd_tunneling, cd_l2tag2); diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h index fb065d4fe15c..fde5f42524fb 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h @@ -153,7 +153,6 @@ enum i40e_dyn_idx_t { #define DESC_NEEDED (MAX_SKB_FRAGS + 4) #define I40E_MIN_DESC_PENDING 4 -#define I40E_TX_FLAGS_CSUM BIT(0) #define I40E_TX_FLAGS_HW_VLAN BIT(1) #define I40E_TX_FLAGS_SW_VLAN BIT(2) #define I40E_TX_FLAGS_TSO BIT(3) diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c index 0ee13f6619c4..143c5703f54e 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c @@ -1602,12 +1602,13 @@ static int i40e_tso(struct i40e_ring *tx_ring, struct sk_buff *skb, * @tx_flags: pointer to Tx flags currently set * @td_cmd: Tx descriptor command bits to set * @td_offset: Tx descriptor header offsets to set + * @tx_ring: Tx descriptor ring * @cd_tunneling: ptr to context desc bits **/ -static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, - u32 *td_cmd, u32 *td_offset, - struct i40e_ring *tx_ring, - u32 *cd_tunneling) +static int i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, + u32 *td_cmd, u32 *td_offset, + struct i40e_ring *tx_ring, + u32 *cd_tunneling) { union { struct iphdr *v4; @@ -1624,6 +1625,9 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, __be16 frag_off; u8 l4_proto = 0; + if (skb->ip_summed != CHECKSUM_PARTIAL) + return 0; + ip.hdr = skb_network_header(skb); l4.hdr = skb_transport_header(skb); @@ -1666,7 +1670,11 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, *tx_flags |= I40E_TX_FLAGS_VXLAN_TUNNEL; break; default: - return; + if (*tx_flags & I40E_TX_FLAGS_TSO) + return -1; + + skb_checksum_help(skb); + return 0; } /* compute tunnel header size */ @@ -1730,11 +1738,16 @@ static void i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT; break; default: - break; + if (*tx_flags & I40E_TX_FLAGS_TSO) + return -1; + skb_checksum_help(skb); + return 0; } *td_cmd |= cmd; *td_offset |= offset; + + return 1; } /** @@ -2150,12 +2163,10 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb, td_cmd |= I40E_TX_DESC_CMD_ICRC; /* Always offload the checksum, since it's in the data descriptor */ - if (skb->ip_summed == CHECKSUM_PARTIAL) { - tx_flags |= I40E_TX_FLAGS_CSUM; - - i40e_tx_enable_csum(skb, &tx_flags, &td_cmd, &td_offset, - tx_ring, &cd_tunneling); - } + tso = i40e_tx_enable_csum(skb, &tx_flags, &td_cmd, &td_offset, + tx_ring, &cd_tunneling); + if (tso < 0) + goto out_drop; i40e_create_tx_ctx(tx_ring, cd_type_cmd_tso_mss, cd_tunneling, cd_l2tag2); diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.h b/drivers/net/ethernet/intel/i40evf/i40e_txrx.h index 043b9556834f..6ea8701cf066 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.h +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.h @@ -153,7 +153,6 @@ enum i40e_dyn_idx_t { #define DESC_NEEDED (MAX_SKB_FRAGS + 4) #define I40E_MIN_DESC_PENDING 4 -#define I40E_TX_FLAGS_CSUM BIT(0) #define I40E_TX_FLAGS_HW_VLAN BIT(1) #define I40E_TX_FLAGS_SW_VLAN BIT(2) #define I40E_TX_FLAGS_TSO BIT(3) -- 2.30.2