QDMA Features¶

QDMA DPDK Driver supports the following list of features

Hardware Features¶

SRIOV with 4 Physical Functions and 252 Virtual Functions
Memory Mapped (MM) and Stream (ST) interfaces per queue
2048 queues sets
- 2048 H2C (host-to-card) Descriptor rings
- 2048 C2H (card-to-host) Descriptor rings
- 2048 Completion rings
Mailbox communication between PF and VF driver
Interrupt support for Mailbox events
HW Error reporting
Zero byte transfers
Immediate data transfers
Descriptor bypass (8, 16, 32, 64 descriptor sizes) support
Descriptor Prefetching
Streaming C2H completion entry coalescing
Disabling overflow check in completion ring
Streaming H2C to C2H and C2H to H2C loopback support
Dynamic queue configuration
Completion ring descriptors of 8, 16, 32, 64 bytes sizes
ECC support

SRIOV with 4 Physical Functions (PF) and 240 Virtual Functions (VF)
Debug mode, with extra registers for debug purposes
Descriptor Engine can be configured in Internal Mode only
Supports 4096 queue sets for Physical Functions
- 4096 H2C (Host-to-Card) descriptor rings
- 4096 C2H (Card-to-Host) descriptor rings
- 4096 completion rings
Supports 256 queue sets for Virtual Functions
- 256 H2C (Host-to-Card) descriptor rings
- 256 C2H (Card-to-Host) descriptor rings
- 256 Completion Rings

For details on Hardware Features refer to QDMA_Product_Guide.

Support DPDK v22.11 LTS
Support DPDK v21.11 LTS
Support DPDK v20.11 LTS
Support driver binding to igb_uio and vfio-pci
Support device arguments (module parameters) for device level configuration
Allows only Privileged Physical Functions to program the contexts and configuration registers
Device and queue configuration through additional driver APIs
Interoperability between Linux driver (as PF/VF) and DPDK driver (as PF/VF)
SW versioning
Added support for detailed register dump
Added support for post processing HW error messages
Added support for Debug mode and Internal only mode