1 .. SPDX-License-Identifier: GPL-2.0 2 3 ============================================================ 4 Linux Kernel Driver for Huawei Intelligent NIC(HiNIC) family 5 ============================================================ 6 7 Overview: 8 ========= 9 HiNIC is a network interface card for the Data Center Area. 10 11 The driver supports a range of link-speed devices (10GbE, 25GbE, 40GbE, etc.). 12 The driver supports also a negotiated and extendable feature set. 13 14 Some HiNIC devices support SR-IOV. This driver is used for Physical Function 15 (PF). 16 17 HiNIC devices support MSI-X interrupt vector for each Tx/Rx queue and 18 adaptive interrupt moderation. 19 20 HiNIC devices support also various offload features such as checksum offload, 21 TCP Transmit Segmentation Offload(TSO), Receive-Side Scaling(RSS) and 22 LRO(Large Receive Offload). 23 24 25 Supported PCI vendor ID/device IDs: 26 =================================== 27 28 19e5:1822 - HiNIC PF 29 30 31 Driver Architecture and Source Code: 32 ==================================== 33 34 hinic_dev - Implement a Logical Network device that is independent from 35 specific HW details about HW data structure formats. 36 37 hinic_hwdev - Implement the HW details of the device and include the components 38 for accessing the PCI NIC. 39 40 hinic_hwdev contains the following components: 41 =============================================== 42 43 HW Interface: 44 ============= 45 46 The interface for accessing the pci device (DMA memory and PCI BARs). 47 (hinic_hw_if.c, hinic_hw_if.h) 48 49 Configuration Status Registers Area that describes the HW Registers on the 50 configuration and status BAR0. (hinic_hw_csr.h) 51 52 MGMT components: 53 ================ 54 55 Asynchronous Event Queues(AEQs) - The event queues for receiving messages from 56 the MGMT modules on the cards. (hinic_hw_eqs.c, hinic_hw_eqs.h) 57 58 Application Programmable Interface commands(API CMD) - Interface for sending 59 MGMT commands to the card. (hinic_hw_api_cmd.c, hinic_hw_api_cmd.h) 60 61 Management (MGMT) - the PF to MGMT channel that uses API CMD for sending MGMT 62 commands to the card and receives notifications from the MGMT modules on the 63 card by AEQs. Also set the addresses of the IO CMDQs in HW. 64 (hinic_hw_mgmt.c, hinic_hw_mgmt.h) 65 66 IO components: 67 ============== 68 69 Completion Event Queues(CEQs) - The completion Event Queues that describe IO 70 tasks that are finished. (hinic_hw_eqs.c, hinic_hw_eqs.h) 71 72 Work Queues(WQ) - Contain the memory and operations for use by CMD queues and 73 the Queue Pairs. The WQ is a Memory Block in a Page. The Block contains 74 pointers to Memory Areas that are the Memory for the Work Queue Elements(WQEs). 75 (hinic_hw_wq.c, hinic_hw_wq.h) 76 77 Command Queues(CMDQ) - The queues for sending commands for IO management and is 78 used to set the QPs addresses in HW. The commands completion events are 79 accumulated on the CEQ that is configured to receive the CMDQ completion events. 80 (hinic_hw_cmdq.c, hinic_hw_cmdq.h) 81 82 Queue Pairs(QPs) - The HW Receive and Send queues for Receiving and Transmitting 83 Data. (hinic_hw_qp.c, hinic_hw_qp.h, hinic_hw_qp_ctxt.h) 84 85 IO - de/constructs all the IO components. (hinic_hw_io.c, hinic_hw_io.h) 86 87 HW device: 88 ========== 89 90 HW device - de/constructs the HW Interface, the MGMT components on the 91 initialization of the driver and the IO components on the case of Interface 92 UP/DOWN Events. (hinic_hw_dev.c, hinic_hw_dev.h) 93 94 95 hinic_dev contains the following components: 96 =============================================== 97 98 PCI ID table - Contains the supported PCI Vendor/Device IDs. 99 (hinic_pci_tbl.h) 100 101 Port Commands - Send commands to the HW device for port management 102 (MAC, Vlan, MTU, ...). (hinic_port.c, hinic_port.h) 103 104 Tx Queues - Logical Tx Queues that use the HW Send Queues for transmit. 105 The Logical Tx queue is not dependent on the format of the HW Send Queue. 106 (hinic_tx.c, hinic_tx.h) 107 108 Rx Queues - Logical Rx Queues that use the HW Receive Queues for receive. 109 The Logical Rx queue is not dependent on the format of the HW Receive Queue. 110 (hinic_rx.c, hinic_rx.h) 111 112 hinic_dev - de/constructs the Logical Tx and Rx Queues. 113 (hinic_main.c, hinic_dev.h) 114 115 116 Miscellaneous 117 ============= 118 119 Common functions that are used by HW and Logical Device. 120 (hinic_common.c, hinic_common.h) 121 122 123 Support 124 ======= 125 126 If an issue is identified with the released source code on the supported kernel 127 with a supported adapter, email the specific information related to the issue to 128 aviad.krawczyk@huawei.com.
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