10. BNX2X Poll Mode Driver - Documentation

Data Plane Development Kit 25.11.0

• Getting Started Guide for Linux
• Getting Started Guide for FreeBSD
• Getting Started Guide for Windows
• Sample Applications User Guides
• Programmer’s Guide
• HowTo Guides
• DPDK Tools User Guides
• Testpmd Application User Guide
• Network Interface Controller Drivers
  • 1. Overview of Networking Drivers
  • 2. Features Overview
  • 3. Compiling and testing a PMD for a NIC
  • 4. AF_PACKET Poll Mode Driver
  • 5. AF_XDP Poll Mode Driver
  • 6. ARK Poll Mode Driver
  • 7. Aquantia Atlantic DPDK Driver
  • 8. AVP Poll Mode Driver
  • 9. AXGBE Poll Mode Driver
  • 10. BNX2X Poll Mode Driver
    • 10.1. Supported Features
    • 10.2. Non-supported Features
    • 10.3. Co-existence considerations
    • 10.4. Supported QLogic NICs
    • 10.5. Prerequisites
    • 10.6. Pre-Installation Configuration
      • 10.6.1. Config Options
    • 10.7. Driver compilation and testing
    • 10.8. Jumbo: Limitation
    • 10.9. SR-IOV: Prerequisites and sample Application Notes
  • 11. BNXT Poll Mode Driver
  • 12. CNXK Poll Mode driver
  • 13. CPFL Poll Mode Driver
  • 14. CXGBE Poll Mode Driver
  • 15. DPAA Poll Mode Driver
  • 16. DPAA2 Poll Mode Driver
  • 17. Driver for VM Emulated Devices
  • 18. ENA Poll Mode Driver
  • 19. ENETC Poll Mode Driver
  • 20. ENETC4 Poll Mode Driver
  • 21. ENETFEC Poll Mode Driver
  • 22. ENIC Poll Mode Driver
  • 23. Fail-safe poll mode driver library
  • 24. FM10K Poll Mode Driver
  • 25. GVE poll mode driver
  • 26. HINIC Poll Mode Driver
  • 27. HINIC3 Poll Mode Driver
  • 28. HNS3 Poll Mode Driver
  • 29. I40E Poll Mode Driver
  • 30. ICE Poll Mode Driver
  • 31. IDPF Poll Mode Driver
  • 32. IGB Poll Mode Driver
  • 33. IGC Poll Mode Driver
  • 34. Intel Virtual Function Driver
  • 35. IONIC Driver
  • 36. IPN3KE Poll Mode Driver
  • 37. IXGBE Driver
  • 38. MANA poll mode driver library
  • 39. Memif Poll Mode Driver
  • 40. NVIDIA MLX4 Ethernet Driver
  • 41. NVIDIA MLX5 Ethernet Driver
  • 42. MVNETA Poll Mode Driver
  • 43. MVPP2 Poll Mode Driver
  • 44. NBL Poll Mode Driver
  • 45. Netvsc poll mode driver
  • 46. NFB poll mode driver library
  • 47. NFP poll mode driver library
  • 48. NGBE Poll Mode Driver
  • 49. NTNIC Poll Mode Driver
  • 50. NULL Poll Mode Driver
  • 51. OCTEON TX EP Poll Mode driver
  • 52. OCTEON TX Poll Mode driver
  • 53. Libpcap and Ring Based Poll Mode Drivers
  • 54. PFE Poll Mode Driver
  • 55. QEDE Poll Mode Driver
  • 56. R8169 Poll Mode Driver
  • 57. RNP Poll Mode driver
  • 58. Solarflare libefx-based Poll Mode Driver
  • 59. Soft NIC Poll Mode Driver
  • 60. TAP Poll Mode Driver
  • 61. ThunderX NICVF Poll Mode Driver
  • 62. TXGBE Poll Mode Driver
  • 63. VDEV_NETVSC driver
  • 64. Poll Mode Driver that wraps vhost library
  • 65. Poll Mode Driver for Emulated Virtio NIC
  • 66. Poll Mode Driver for Paravirtual VMXNET3 NIC
  • 67. XSC Poll Mode Driver
  • 68. ZXDH Poll Mode Driver
• Baseband Device Drivers
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• Machine Learning Device Driver
• DMA Device Drivers
• General-Purpose Graphics Processing Unit Drivers
• Event Device Drivers
• Rawdev Drivers
• Mempool Device Driver
• Platform Specific Guides
• Contributor’s Guidelines
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Data Plane Development Kit

• Network Interface Controller Drivers
• 10. BNX2X Poll Mode Driver
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10. BNX2X Poll Mode Driver

The BNX2X poll mode driver library (librte_net_bnx2x) implements support for QLogic 578xx 10/20 Gbps family of adapters as well as their virtual functions (VF) in SR-IOV context. It is supported on several standard Linux distros like RHEL and SLES. It is compile-tested under FreeBSD OS.

More information can be found at QLogic Corporation’s Official Website.

10.1. Supported Features

BNX2X PMD has support for:

• Base L2 features

• Unicast/multicast filtering

• Promiscuous mode

• Port hardware statistics

• SR-IOV VF

• Experimental 2.5Gbps support

10.2. Non-supported Features

The features not yet supported include:

• TSS (Transmit Side Scaling)

• RSS (Receive Side Scaling)

• LRO/TSO offload

• Checksum offload

• SR-IOV PF

• Rx TX scatter gather

10.3. Co-existence considerations

• QLogic 578xx CNAs support Ethernet, iSCSI and FCoE functionalities. These functionalities are supported using QLogic Linux kernel drivers bnx2x, cnic, bnx2i and bnx2fc. DPDK is supported on these adapters using bnx2x PMD.

• When SR-IOV is not enabled on the adapter, QLogic Linux kernel drivers (bnx2x, cnic, bnx2i and bnx2fc) and bnx2x PMD can’t be attached to different PFs on a given QLogic 578xx adapter. A given adapter needs to be completely used by DPDK or Linux drivers. Before binding DPDK driver to one or more PFs on the adapter, please make sure to unbind Linux drivers from all PFs of the adapter. If there are multiple adapters on the system, one or more adapters can be used by DPDK driver completely and other adapters can be used by Linux drivers completely.

• When SR-IOV is enabled on the adapter, Linux kernel drivers (bnx2x, cnic, bnx2i and bnx2fc) can be bound to the PFs of a given adapter and either bnx2x PMD or Linux drivers bnx2x can be bound to the VFs of the adapter.

10.4. Supported QLogic NICs

• 578xx

10.5. Prerequisites

• Requires firmware version 7.13.11.0. It is included in most of the standard Linux distros. If it is not available visit linux-firmware git repository to get the required firmware.

• 2.5Gbps speed currently requires that the firmware’s NVM configuration number 7 / 35 (first port) and 36 (second port) are set to 0x70 for 1G/2.5G/10G support. This can be done for EFI or DOS using EDIAG tool from Broadcom.

10.6. Pre-Installation Configuration

10.6.1. Config Options

The following options can be enabled with Meson flags. Please note that enabling debugging options may affect system performance.

• RTE_LIBRTE_BNX2X_DEBUG_TX (default disabled)

  Toggle display of transmit fast path run-time messages.

• RTE_LIBRTE_BNX2X_DEBUG_RX (default disabled)

  Toggle display of receive fast path run-time messages.

• RTE_LIBRTE_BNX2X_DEBUG_PERIODIC (default disabled)

  Toggle display of register reads and writes.

10.7. Driver compilation and testing

Refer to the document compiling and testing a PMD for a NIC for details.

10.8. Jumbo: Limitation

Rx descriptor limit for number of segments per MTU is set to 1. PMD doesn’t support Jumbo Rx scatter gather. Some applications can adjust mbuf_size based on this param and max_pkt_len.

For others, PMD detects the condition where Rx packet length cannot be held by configured mbuf size and logs the message.

Example output:

[...] [bnx2x_recv_pkts:397(04:00.0:dpdk-port-0)] mbuf size 2048 is not enough to hold Rx packet length more than 2046

10.9. SR-IOV: Prerequisites and sample Application Notes

This section provides instructions to configure SR-IOV with Linux OS.

1. Verify SR-IOV and ARI capabilities are enabled on the adapter using lspci:

   lspci -s <slot> -vvv

   Example output:

   [...] Capabilities: [1b8 v1] Alternative Routing-ID Interpretation (ARI) [...] Capabilities: [1c0 v1] Single Root I/O Virtualization (SR-IOV) [...] Kernel driver in use: igb_uio

2. Load the kernel module:

   modprobe bnx2x

   Example output:

   systemd-udevd[4848]: renamed network interface eth0 to ens5f0 systemd-udevd[4848]: renamed network interface eth1 to ens5f1

3. Bring up the PF ports:

   ifconfig ens5f0 up ifconfig ens5f1 up

4. Create VF device(s):

   Echo the number of VFs to be created into “sriov_numvfs” sysfs entry of the parent PF.

   Example output:

   echo 2 > /sys/devices/pci0000:00/0000:00:03.0/0000:81:00.0/sriov_numvfs

5. Assign VF MAC address:

   Assign MAC address to the VF using iproute2 utility. The syntax is: ip link set <PF iface> vf <VF id> mac <macaddr>

   Example output:

   ip link set ens5f0 vf 0 mac 52:54:00:2f:9d:e8

6. PCI Passthrough:

   The VF devices may be passed through to the guest VM using virt-manager or virsh etc. bnx2x PMD should be used to bind the VF devices in the guest VM using the instructions outlined in the Application notes below.

7. Running testpmd: (Supply --log-level="pmd.net.bnx2x.driver",7 to view informational messages):

   Follow instructions available in the document compiling and testing a PMD for a NIC to run testpmd.

   Example output:

   [...] EAL: PCI device 0000:84:00.0 on NUMA socket 1 EAL: probe driver: 14e4:168e rte_bnx2x_pmd EAL: PCI memory mapped at 0x7f14f6fe5000 EAL: PCI memory mapped at 0x7f14f67e5000 EAL: PCI memory mapped at 0x7f15fbd9b000 EAL: PCI device 0000:84:00.1 on NUMA socket 1 EAL: probe driver: 14e4:168e rte_bnx2x_pmd EAL: PCI memory mapped at 0x7f14f5fe5000 EAL: PCI memory mapped at 0x7f14f57e5000 EAL: PCI memory mapped at 0x7f15fbd4f000 Interactive-mode selected Configuring Port 0 (socket 0) PMD: bnx2x_dev_tx_queue_setup(): fp[00] req_bd=512, thresh=512, usable_bd=1020, total_bd=1024, tx_pages=4 PMD: bnx2x_dev_rx_queue_setup(): fp[00] req_bd=128, thresh=0, usable_bd=510, total_bd=512, rx_pages=1, cq_pages=8 PMD: bnx2x_print_adapter_info(): [...] Checking link statuses... Port 0 Link Up - speed 10000 Mbps - full-duplex Port 1 Link Up - speed 10000 Mbps - full-duplex Done testpmd>