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| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2022-03-21 11:42:05 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-03-21 13:21:16 +0000 |
| commit | 0dcf7f500b0a56c0c58deeeac7692fe213aa08b1 (patch) | |
| tree | 8089529f9a694f7426ba626942261e4cc1f44e85 /drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c | |
| parent | 07cd69c96bff4edf5edcd17b5a821f63343bf9cc (diff) | |
| download | linux-0dcf7f500b0a56c0c58deeeac7692fe213aa08b1.tar.gz linux-0dcf7f500b0a56c0c58deeeac7692fe213aa08b1.tar.bz2 linux-0dcf7f500b0a56c0c58deeeac7692fe213aa08b1.zip | |
nfp: use TX ring pointer write back
Newer versions of the PCIe microcode support writing back the
position of the TX pointer back into host memory. This speeds
up TX completions, because we avoid a read from device memory
(replacing PCIe read with DMA coherent read).
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Fei Qin <fei.qin@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c index 791203d07ac7..d8b735ccf899 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c @@ -99,11 +99,14 @@ static int nfp_tx_q_show(struct seq_file *file, void *data) d_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); d_wr_p = nfp_qcp_wr_ptr_read(tx_ring->qcp_q); - seq_printf(file, "TX[%02d,%02d%s]: cnt=%u dma=%pad host=%p H_RD=%u H_WR=%u D_RD=%u D_WR=%u\n", + seq_printf(file, "TX[%02d,%02d%s]: cnt=%u dma=%pad host=%p H_RD=%u H_WR=%u D_RD=%u D_WR=%u", tx_ring->idx, tx_ring->qcidx, tx_ring == r_vec->tx_ring ? "" : "xdp", tx_ring->cnt, &tx_ring->dma, tx_ring->txds, tx_ring->rd_p, tx_ring->wr_p, d_rd_p, d_wr_p); + if (tx_ring->txrwb) + seq_printf(file, " TXRWB=%llu", *tx_ring->txrwb); + seq_putc(file, '\n'); nfp_net_debugfs_print_tx_descs(file, &nn->dp, r_vec, tx_ring, d_rd_p, d_wr_p); |