[dpdk-dev] [PATCH 0/6] get status of Rx and Tx descriptors
Andrew Rybchenko
arybchenko at solarflare.com
Wed Mar 1 19:02:16 CET 2017
On 03/01/2017 08:19 PM, Olivier Matz wrote:
> This patchset introduces a new ethdev API:
> - rte_eth_rx_descriptor_status()
> - rte_eth_tx_descriptor_status()
May be corresponding features should be added to the NICs documentation?
> The Rx API is aims to replace rte_eth_rx_descriptor_done() which
> does almost the same, but does not differentiate the case of a
> descriptor used by the driver (not returned to the hw).
>
> The usage of these functions can be:
> - on Rx, anticipate that the cpu is not fast enough to process
> all incoming packets, and take dispositions to solve the
> problem (add more cpus, drop specific packets, ...)
> - on Tx, detect that the link is overloaded, and take dispositions
> to solve the problem (notify flow control, drop specific
> packets)
>
> The patchset updates ixgbe, i40e, e1000, mlx5.
> The other drivers that implement the descriptor_done() API are
> fm10k, sfc, virtio. They are not updated.
> If the new API is accepted, the descriptor_done() can be deprecated,
> and examples/l3fwd-power will be updated to.
>
>
> RFC->v1:
> - instead of optimizing an API that returns the number of used
> descriptors like rx_queue_count(), use a more simple API that
> returns the status of a descriptor, like rx_descriptor_done().
> - remove ethdev api rework (first 2 patches), they have been
> sent separately
>
>
> Olivier Matz (6):
> ethdev: add descriptor status API
> net/ixgbe: implement descriptor status API
> net/e1000: implement descriptor status API (igb)
> net/e1000: implement descriptor status API (em)
> net/mlx5: implement descriptor status API
> net/i40e: implement descriptor status API
>
> drivers/net/e1000/e1000_ethdev.h | 10 +++++
> drivers/net/e1000/em_ethdev.c | 2 +
> drivers/net/e1000/em_rxtx.c | 49 ++++++++++++++++++++++
> drivers/net/e1000/igb_ethdev.c | 2 +
> drivers/net/e1000/igb_rxtx.c | 46 +++++++++++++++++++++
> drivers/net/i40e/i40e_ethdev.c | 2 +
> drivers/net/i40e/i40e_ethdev_vf.c | 2 +
> drivers/net/i40e/i40e_rxtx.c | 56 +++++++++++++++++++++++++
> drivers/net/i40e/i40e_rxtx.h | 4 ++
> drivers/net/ixgbe/ixgbe_ethdev.c | 4 ++
> drivers/net/ixgbe/ixgbe_ethdev.h | 5 +++
> drivers/net/ixgbe/ixgbe_rxtx.c | 55 +++++++++++++++++++++++++
> drivers/net/mlx5/mlx5.c | 2 +
> drivers/net/mlx5/mlx5_rxtx.c | 83 +++++++++++++++++++++++++++++++++++++
> drivers/net/mlx5/mlx5_rxtx.h | 2 +
> lib/librte_ether/rte_ethdev.h | 86 +++++++++++++++++++++++++++++++++++++++
> 16 files changed, 410 insertions(+)
>
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