src/sys/modules/ena, branch releng/12.2

MFC: ENA netmap support and bug fixes

2020-09-06T14:23:31Z

r363638 Fix ENA build when integrated into kernel r354242 Make valdiate_rx_req_id static inline because it uses other static r354225 Update ENA version to v2.1.0 r354224 Add support for ENA NETMAP partial initialization r354223 Add support for ENA NETMAP Tx r354222 Add support for ENA NETMAP Rx r354221 Introduce NETMAP support in ENA r354220 Split Rx/Tx from initialization code in ENA driver r354219 Fix ENA keep-alive timeout due to prolonged reset r354218 Add WC support for arm64 in the ENA driver Obtained from: Semihalf Sponsored by: Amazon, Inc.

MFC: Merge ENA v2.0.0 driver

2020-09-06T14:13:51Z

r348416 Update ENA version to v2.0.0 r348414 Fix ENA manual issues r348413 Improve ENA reset handling r348412 Fix NULL pointer dereference in ena_up() r348411 Unify new line characters in the ENA driver r348410 Fix Tx offloads for fragmented pkt headers in ENA r348409 Split ENA reset routine into restore and destroy stages r348408 Use bitfield for storing global ENA device states r348407 Fix error handling when ENA reset fails r348406 Fill bdf field of the host_info structure in ENA r348405 Add additional doorbells on ENA Tx path r348404 Limit maximum size of Rx refill threshold in ENA r348403 Add support for the LLQv2 and WC in ENA r348402 Lock optimization in ENA r348401 Add tuneable drbr ring size and hw queues depth for ENA r348400 Fix error in validate_tx_req_id() in ENA r348399 Change attach order to prevent crash upon failure in ENA r348398 Change order of ifp release on ENA detach r348397 Check for number of MSI-x upon partial allocation in ENA r348396 Set error value when allocation of IO irq fails in ENA r348395 Set vaddr and paddr as NULL when DMA alloc fails in ENA r348394 Fix DMA synchronization in the ENA driver Tx and Rx paths r348393 Check for missing MSI-x and Tx completions in ENA r348392 Fill number of CPUs field on ENA host_info structure r348391 Print ENA Tx error conditionally r348390 Trigger reset in ENA if there are too many Rx descriptors r348389 Remove RSS support in ENA r348388 Add notification AENQ handler for ENA r348387 Print information when ENA admin error occurs r348386 Do not specify active media type in ENA r348385 Adjust ENA driver to the new ena-com Obtained from: Semihalf Sponsored by: Amazon, Inc.

MFC r362530: teach ena driver about RSS kernel option

2020-07-30T13:55:05Z

Networking is broken if the driver configures its (virtual) hardware to use a hash algorithm (or a key) different from the one that the network stack (software RSS) uses. This can be seen with connections initiated from the host. The PCB will be placed into the hash table based on the hash value calculated by the software. The hardware-calculated hash value in reponse packets will be different, so the PCB won't be found. Tested with a kernel compiled with 'options RSS' on an instance with ena driver.

Add support for Amazon Elastic Network Adapter (ENA) NIC

2017-05-22T14:46:13Z

ENA is a networking interface designed to make good use of modern CPU features and system architectures. The ENA device exposes a lightweight management interface with a minimal set of memory mapped registers and extendable command set through an Admin Queue. The driver supports a range of ENA devices, is link-speed independent (i.e., the same driver is used for 10GbE, 25GbE, 40GbE, etc.), and has a negotiated and extendable feature set. Some ENA devices support SR-IOV. This driver is used for both the SR-IOV Physical Function (PF) and Virtual Function (VF) devices. ENA devices enable high speed and low overhead network traffic processing by providing multiple Tx/Rx queue pairs (the maximum number is advertised by the device via the Admin Queue), a dedicated MSI-X interrupt vector per Tx/Rx queue pair, and CPU cacheline optimized data placement. The ENA driver supports industry standard TCP/IP offload features such as checksum offload and TCP transmit segmentation offload (TSO). Receive-side scaling (RSS) is supported for multi-core scaling. The ENA driver and its corresponding devices implement health monitoring mechanisms such as watchdog, enabling the device and driver to recover in a manner transparent to the application, as well as debug logs. Some of the ENA devices support a working mode called Low-latency Queue (LLQ), which saves several more microseconds. This feature will be implemented for driver in future releases. Submitted by: Michal Krawczyk Jakub Palider Jan Medala Obtained from: Semihalf Sponsored by: Amazon.com Inc. Differential revision: https://reviews.freebsd.org/D10427