kernel/drivers/net/ethernet/amazon/ena/ena_netdev.h, branch linux-6.18.y

net: ena: Add debugfs support to the ENA driver

2025-06-19T01:57:29Z

Adding the base directory of debugfs to the driver. In order for the folder to be unique per driver instantiation, the chosen name is the device name. This commit contains the initialization and the base folder. The creation of the base folder may fail, but is considered non-fatal. Signed-off-by: David Arinzon Link: https://patch.msgid.link/20250617110545.5659-8-darinzon@amazon.com Signed-off-by: Jakub Kicinski

net: ena: Add devlink port support

2025-06-19T01:57:28Z

Add the basic functionality to support devlink port for devlink model completeness purposes. Current support is for registration/un-registration. Signed-off-by: David Arinzon Link: https://patch.msgid.link/20250617110545.5659-5-darinzon@amazon.com Signed-off-by: Jakub Kicinski

net: ena: Add device reload capability through devlink

2025-06-19T01:57:28Z

Adding basic devlink capability support of reloading the driver. This capability is required to support driver init type devlink params (DEVLINK_PARAM_CMODE_DRIVERINIT). Such params require reloading of the driver (destroy/restore sequence). The reloading is done by the devlink framework using the hooks provided by the driver. Signed-off-by: David Arinzon Link: https://patch.msgid.link/20250617110545.5659-4-darinzon@amazon.com Signed-off-by: Jakub Kicinski

net: ena: Add PHC support in the ENA driver

2025-06-19T01:57:28Z

The ENA driver will be extended to support the new PHC feature using ptp_clock interface [1]. this will provide timestamp reference for user space to allow measuring time offset between the PHC and the system clock in order to achieve nanosecond accuracy. [1] - https://www.kernel.org/doc/html/latest/driver-api/ptp.html Signed-off-by: Amit Bernstein Signed-off-by: David Arinzon Link: https://patch.msgid.link/20250617110545.5659-2-darinzon@amazon.com Signed-off-by: Jakub Kicinski

net: ena: Add ENA Express metrics support

2024-09-13T01:01:17Z

ENA Express metrics, called `ena_srd` are exposed to customers via `ethtool`. The metrics allow customers to check the configuration (mode), tx/rx counters as well as resource utilization. The documentation is also updated to provide a general explanation about ENA Express as well as links for further information about metrics and configurations. Signed-off-by: Igor Chauskin Signed-off-by: David Arinzon Link: https://patch.msgid.link/20240909084704.13856-2-darinzon@amazon.com Signed-off-by: Jakub Kicinski

net: ena: Add a counter for driver's reset failures

2024-05-13T21:42:04Z

This patch adds a counter to the ena_adapter struct in order to keep track of reset failures. The counter is incremented every time either ena_restore_device() or ena_destroy_device() fail. Signed-off-by: Osama Abboud Signed-off-by: David Arinzon Reviewed-by: Simon Horman Link: https://lore.kernel.org/r/20240512134637.25299-2-darinzon@amazon.com Signed-off-by: Jakub Kicinski

net: ena: Use tx_ring instead of xdp_ring for XDP channel TX

2024-01-04T02:00:57Z

When an XDP program is loaded the existing channels in the driver split into two halves: - The first half of the channels contain RX and TX rings, these queues are used for receiving traffic and sending packets originating from kernel. - The second half of the channels contain only a TX ring. These queues are used for sending packets that were redirected using XDP_TX or XDP_REDIRECT. Referring to the queues in the second half of the channels as "xdp_ring" can be confusing and may give the impression that ENA has the capability to generate an additional special queue. This patch ensures that the xdp_ring field is exclusively used to describe the XDP TX queue that a specific RX queue needs to utilize when forwarding packets with XDP TX and XDP REDIRECT, preserving the integrity of the xdp_ring field in ena_ring. Signed-off-by: Shay Agroskin Signed-off-by: David Arinzon Link: https://lore.kernel.org/r/20240101190855.18739-6-darinzon@amazon.com Signed-off-by: Jakub Kicinski

net: ena: Introduce total_tx_size field in ena_tx_buffer struct

2024-01-04T02:00:57Z

To avoid de-referencing skb or xdp_frame when we poll for TX completion (where they might not be in the cache), save the total TX packet size in the ena_tx_buffer object representing the packet. Also the 'print_once' field's type was changed from u32 to u8 to allow adding the 'total_tx_size' without changing the total size of the struct. Signed-off-by: Shay Agroskin Signed-off-by: David Arinzon Link: https://lore.kernel.org/r/20240101190855.18739-5-darinzon@amazon.com Signed-off-by: Jakub Kicinski

net: ena: Put orthogonal fields in ena_tx_buffer in a union

2024-01-04T02:00:57Z

The skb and xdpf pointers cannot be set together in the driver (each TX descriptor can send either an SKB or an XDP frame), and so it makes more sense to put them both in a union. This decreases the overall size of the ena_tx_buffer struct which improves cache locality. Signed-off-by: Shay Agroskin Signed-off-by: David Arinzon Link: https://lore.kernel.org/r/20240101190855.18739-4-darinzon@amazon.com Signed-off-by: Jakub Kicinski

net: ena: Pass ena_adapter instead of net_device to ena_xmit_common()

2024-01-04T02:00:57Z

This change will enable the ability to use ena_xmit_common() in functions that don't have a net_device pointer. While it can be retrieved by dereferencing ena_adapter (adapter->netdev), there's no reason to do it in fast path code where this pointer is only needed for debug prints. Signed-off-by: Shay Agroskin Signed-off-by: David Arinzon Link: https://lore.kernel.org/r/20240101190855.18739-3-darinzon@amazon.com Signed-off-by: Jakub Kicinski