1.. SPDX-License-Identifier: GPL-2.0 2 3============================================================ 4Linux Kernel Driver for Huawei Intelligent NIC(HiNIC) family 5============================================================ 6 7Overview: 8========= 9HiNIC is a network interface card for the Data Center Area. 10 11The driver supports a range of link-speed devices (10GbE, 25GbE, 40GbE, etc.). 12The driver supports also a negotiated and extendable feature set. 13 14Some HiNIC devices support SR-IOV. This driver is used for Physical Function 15(PF). 16 17HiNIC devices support MSI-X interrupt vector for each Tx/Rx queue and 18adaptive interrupt moderation. 19 20HiNIC devices support also various offload features such as checksum offload, 21TCP Transmit Segmentation Offload(TSO), Receive-Side Scaling(RSS) and 22LRO(Large Receive Offload). 23 24 25Supported PCI vendor ID/device IDs: 26=================================== 27 2819e5:1822 - HiNIC PF 29 30 31Driver Architecture and Source Code: 32==================================== 33 34hinic_dev - Implement a Logical Network device that is independent from 35specific HW details about HW data structure formats. 36 37hinic_hwdev - Implement the HW details of the device and include the components 38for accessing the PCI NIC. 39 40hinic_hwdev contains the following components: 41=============================================== 42 43HW Interface: 44============= 45 46The interface for accessing the pci device (DMA memory and PCI BARs). 47(hinic_hw_if.c, hinic_hw_if.h) 48 49Configuration Status Registers Area that describes the HW Registers on the 50configuration and status BAR0. (hinic_hw_csr.h) 51 52MGMT components: 53================ 54 55Asynchronous Event Queues(AEQs) - The event queues for receiving messages from 56the MGMT modules on the cards. (hinic_hw_eqs.c, hinic_hw_eqs.h) 57 58Application Programmable Interface commands(API CMD) - Interface for sending 59MGMT commands to the card. (hinic_hw_api_cmd.c, hinic_hw_api_cmd.h) 60 61Management (MGMT) - the PF to MGMT channel that uses API CMD for sending MGMT 62commands to the card and receives notifications from the MGMT modules on the 63card by AEQs. Also set the addresses of the IO CMDQs in HW. 64(hinic_hw_mgmt.c, hinic_hw_mgmt.h) 65 66IO components: 67============== 68 69Completion Event Queues(CEQs) - The completion Event Queues that describe IO 70tasks that are finished. (hinic_hw_eqs.c, hinic_hw_eqs.h) 71 72Work Queues(WQ) - Contain the memory and operations for use by CMD queues and 73the Queue Pairs. The WQ is a Memory Block in a Page. The Block contains 74pointers to Memory Areas that are the Memory for the Work Queue Elements(WQEs). 75(hinic_hw_wq.c, hinic_hw_wq.h) 76 77Command Queues(CMDQ) - The queues for sending commands for IO management and is 78used to set the QPs addresses in HW. The commands completion events are 79accumulated on the CEQ that is configured to receive the CMDQ completion events. 80(hinic_hw_cmdq.c, hinic_hw_cmdq.h) 81 82Queue Pairs(QPs) - The HW Receive and Send queues for Receiving and Transmitting 83Data. (hinic_hw_qp.c, hinic_hw_qp.h, hinic_hw_qp_ctxt.h) 84 85IO - de/constructs all the IO components. (hinic_hw_io.c, hinic_hw_io.h) 86 87HW device: 88========== 89 90HW device - de/constructs the HW Interface, the MGMT components on the 91initialization of the driver and the IO components on the case of Interface 92UP/DOWN Events. (hinic_hw_dev.c, hinic_hw_dev.h) 93 94 95hinic_dev contains the following components: 96=============================================== 97 98PCI ID table - Contains the supported PCI Vendor/Device IDs. 99(hinic_pci_tbl.h) 100 101Port Commands - Send commands to the HW device for port management 102(MAC, Vlan, MTU, ...). (hinic_port.c, hinic_port.h) 103 104Tx Queues - Logical Tx Queues that use the HW Send Queues for transmit. 105The Logical Tx queue is not dependent on the format of the HW Send Queue. 106(hinic_tx.c, hinic_tx.h) 107 108Rx Queues - Logical Rx Queues that use the HW Receive Queues for receive. 109The Logical Rx queue is not dependent on the format of the HW Receive Queue. 110(hinic_rx.c, hinic_rx.h) 111 112hinic_dev - de/constructs the Logical Tx and Rx Queues. 113(hinic_main.c, hinic_dev.h) 114 115 116Miscellaneous 117============= 118 119Common functions that are used by HW and Logical Device. 120(hinic_common.c, hinic_common.h) 121 122 123Support 124======= 125 126If an issue is identified with the released source code on the supported kernel 127with a supported adapter, email the specific information related to the issue to 128aviad.krawczyk@huawei.com. 129