diff options
| author | Michael Chan <mchan@broadcom.com> | 2016-02-10 22:33:49 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-02-16 20:50:02 (GMT) |
| commit | 4419dbe6a0f031ddb2df4cd993805546a566d20e (patch) | |
| tree | bbc3acf688791399e3f9ac75d37b6ee8c8accaec /drivers/net/ethernet/broadcom/bnxt/bnxt.h | |
| parent | 1c49c421f3ec446f1e0eda6d965a6cb23214d7a1 (diff) | |
| download | linux-4419dbe6a0f031ddb2df4cd993805546a566d20e.tar.xz | |
bnxt_en: Fix implementation of tx push operation.
tx push is supported for small packets to reduce DMA latency. The
following bugs are fixed in this patch:
1. Fix the definition of the push BD which is different from the DMA BD.
2. The push buffer has to be zero padded to the next 64-bit word boundary
or tx checksum won't be correct.
3. Increase the tx push packet threshold to 164 bytes (192 bytes with the BD)
so that small tunneled packets are within the threshold.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnxt/bnxt.h')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index 8af3ca8..9b4866c 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -523,10 +523,16 @@ struct bnxt_ring_struct { struct tx_push_bd { __le32 doorbell; - struct tx_bd txbd1; + __le32 tx_bd_len_flags_type; + u32 tx_bd_opaque; struct tx_bd_ext txbd2; }; +struct tx_push_buffer { + struct tx_push_bd push_bd; + u32 data[25]; +}; + struct bnxt_tx_ring_info { struct bnxt_napi *bnapi; u16 tx_prod; @@ -538,8 +544,9 @@ struct bnxt_tx_ring_info { dma_addr_t tx_desc_mapping[MAX_TX_PAGES]; - struct tx_push_bd *tx_push; + struct tx_push_buffer *tx_push; dma_addr_t tx_push_mapping; + __le64 data_mapping; #define BNXT_DEV_STATE_CLOSING 0x1 u32 dev_state; |