diff options
author | Arthur Kiyanovski <akiyano@amazon.com> | 2018-10-11 11:26:16 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2018-10-11 10:13:50 -0700 |
commit | 0e575f8542d1f4d74df30b5a9ba419c5373d01a1 (patch) | |
tree | 6834152b12513ee06cc06e3cf761b2dd4cec0d76 /drivers/net/ethernet/amazon/ena/ena_eth_com.c | |
parent | 7b68b8361452e710f383bef408174309c773e953 (diff) |
net: ena: minor performance improvement
Reduce fastpath overhead by making ena_com_tx_comp_req_id_get() inline.
Also move it to ena_eth_com.h file with its dependency function
ena_com_cq_inc_head().
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/amazon/ena/ena_eth_com.c')
-rw-r--r-- | drivers/net/ethernet/amazon/ena/ena_eth_com.c | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/drivers/net/ethernet/amazon/ena/ena_eth_com.c b/drivers/net/ethernet/amazon/ena/ena_eth_com.c index 1c682b76190f..2fa032bab0c3 100644 --- a/drivers/net/ethernet/amazon/ena/ena_eth_com.c +++ b/drivers/net/ethernet/amazon/ena/ena_eth_com.c @@ -59,15 +59,6 @@ static inline struct ena_eth_io_rx_cdesc_base *ena_com_get_next_rx_cdesc( return cdesc; } -static inline void ena_com_cq_inc_head(struct ena_com_io_cq *io_cq) -{ - io_cq->head++; - - /* Switch phase bit in case of wrap around */ - if (unlikely((io_cq->head & (io_cq->q_depth - 1)) == 0)) - io_cq->phase ^= 1; -} - static inline void *get_sq_desc(struct ena_com_io_sq *io_sq) { u16 tail_masked; @@ -477,40 +468,6 @@ int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq, return 0; } -int ena_com_tx_comp_req_id_get(struct ena_com_io_cq *io_cq, u16 *req_id) -{ - u8 expected_phase, cdesc_phase; - struct ena_eth_io_tx_cdesc *cdesc; - u16 masked_head; - - masked_head = io_cq->head & (io_cq->q_depth - 1); - expected_phase = io_cq->phase; - - cdesc = (struct ena_eth_io_tx_cdesc *) - ((uintptr_t)io_cq->cdesc_addr.virt_addr + - (masked_head * io_cq->cdesc_entry_size_in_bytes)); - - /* When the current completion descriptor phase isn't the same as the - * expected, it mean that the device still didn't update - * this completion. - */ - cdesc_phase = READ_ONCE(cdesc->flags) & ENA_ETH_IO_TX_CDESC_PHASE_MASK; - if (cdesc_phase != expected_phase) - return -EAGAIN; - - dma_rmb(); - if (unlikely(cdesc->req_id >= io_cq->q_depth)) { - pr_err("Invalid req id %d\n", cdesc->req_id); - return -EINVAL; - } - - ena_com_cq_inc_head(io_cq); - - *req_id = READ_ONCE(cdesc->req_id); - - return 0; -} - bool ena_com_cq_empty(struct ena_com_io_cq *io_cq) { struct ena_eth_io_rx_cdesc_base *cdesc; |