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ath10k: add TCP/UDP Checksum offload support for QCA99x0
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The patch adds support to offload TCP/UDP checksum
calculations for QCA99x0.

Signed-off-by: Manikanta Pubbisetty <c_mpubbi@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
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Manikanta Pubbisetty authored and Kalle Valo committed Jul 24, 2015
1 parent 19be9e9 commit b963519
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Showing 2 changed files with 20 additions and 1 deletion.
17 changes: 16 additions & 1 deletion drivers/net/wireless/ath/ath10k/htt.h
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Original file line number Diff line number Diff line change
Expand Up @@ -97,10 +97,25 @@ struct htt_data_tx_desc_frag {
} __packed;

struct htt_msdu_ext_desc {
__le32 tso_flag[4];
__le32 tso_flag[3];
__le16 ip_identification;
u8 flags;
u8 reserved;
struct htt_data_tx_desc_frag frags[6];
};

#define HTT_MSDU_EXT_DESC_FLAG_IPV4_CSUM_ENABLE BIT(0)
#define HTT_MSDU_EXT_DESC_FLAG_UDP_IPV4_CSUM_ENABLE BIT(1)
#define HTT_MSDU_EXT_DESC_FLAG_UDP_IPV6_CSUM_ENABLE BIT(2)
#define HTT_MSDU_EXT_DESC_FLAG_TCP_IPV4_CSUM_ENABLE BIT(3)
#define HTT_MSDU_EXT_DESC_FLAG_TCP_IPV6_CSUM_ENABLE BIT(4)

#define HTT_MSDU_CHECKSUM_ENABLE (HTT_MSDU_EXT_DESC_FLAG_IPV4_CSUM_ENABLE \
| HTT_MSDU_EXT_DESC_FLAG_UDP_IPV4_CSUM_ENABLE \
| HTT_MSDU_EXT_DESC_FLAG_UDP_IPV6_CSUM_ENABLE \
| HTT_MSDU_EXT_DESC_FLAG_TCP_IPV4_CSUM_ENABLE \
| HTT_MSDU_EXT_DESC_FLAG_TCP_IPV6_CSUM_ENABLE)

enum htt_data_tx_desc_flags0 {
HTT_DATA_TX_DESC_FLAGS0_MAC_HDR_PRESENT = 1 << 0,
HTT_DATA_TX_DESC_FLAGS0_NO_AGGR = 1 << 1,
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4 changes: 4 additions & 0 deletions drivers/net/wireless/ath/ath10k/htt_tx.c
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Original file line number Diff line number Diff line change
Expand Up @@ -496,6 +496,7 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
u16 msdu_id, flags1 = 0;
dma_addr_t paddr = 0;
u32 frags_paddr = 0;
struct htt_msdu_ext_desc *ext_desc = NULL;

res = ath10k_htt_tx_inc_pending(htt);
if (res)
Expand Down Expand Up @@ -542,6 +543,7 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
if (ar->hw_params.continuous_frag_desc) {
frags = (struct htt_data_tx_desc_frag *)
&htt->frag_desc.vaddr[msdu_id].frags;
ext_desc = &htt->frag_desc.vaddr[msdu_id];
frags[0].tword_addr.paddr_lo =
__cpu_to_le32(skb_cb->paddr);
frags[0].tword_addr.paddr_hi = 0;
Expand Down Expand Up @@ -603,6 +605,8 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
if (msdu->ip_summed == CHECKSUM_PARTIAL) {
flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L3_OFFLOAD;
flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L4_OFFLOAD;
if (ar->hw_params.continuous_frag_desc)
ext_desc->flags |= HTT_MSDU_CHECKSUM_ENABLE;
}

/* Prevent firmware from sending up tx inspection requests. There's
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