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Aviad Krawczykdavem330
Aviad Krawczyk
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net-next/hinic: Initialize hw interface
Initialize hw interface as part of the nic initialization for accessing hw. Signed-off-by: Aviad Krawczyk <[email protected]> Signed-off-by: Zhao Chen <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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‎Documentation/networking/hinic.txt

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Linux Kernel Driver for Huawei Intelligent NIC(HiNIC) family
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============================================================
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Overview:
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=========
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HiNIC is a network interface card for the Data Center Area.
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The driver supports a range of link-speed devices (10GbE, 25GbE, 40GbE, etc.).
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The driver supports also a negotiated and extendable feature set.
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Some HiNIC devices support SR-IOV. This driver is used for Physical Function
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(PF).
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HiNIC devices support MSI-X interrupt vector for each Tx/Rx queue and
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adaptive interrupt moderation.
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HiNIC devices support also various offload features such as checksum offload,
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TCP Transmit Segmentation Offload(TSO), Receive-Side Scaling(RSS) and
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LRO(Large Receive Offload).
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Supported PCI vendor ID/device IDs:
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===================================
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19e5:1822 - HiNIC PF
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Driver Architecture and Source Code:
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====================================
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hinic_dev - Implement a Logical Network device that is independent from
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specific HW details about HW data structure formats.
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hinic_hwdev - Implement the HW details of the device and include the components
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for accessing the PCI NIC.
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hinic_hwdev contains the following components:
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===============================================
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HW Interface:
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=============
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The interface for accessing the pci device (DMA memory and PCI BARs).
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(hinic_hw_if.c, hinic_hw_if.h)
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Configuration Status Registers Area that describes the HW Registers on the
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configuration and status BAR0. (hinic_hw_csr.h)
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MGMT components:
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================
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Asynchronous Event Queues(AEQs) - The event queues for receiving messages from
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the MGMT modules on the cards. (hinic_hw_eqs.c, hinic_hw_eqs.h)
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Application Programmable Interface commands(API CMD) - Interface for sending
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MGMT commands to the card. (hinic_hw_api_cmd.c, hinic_hw_api_cmd.h)
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Management (MGMT) - the PF to MGMT channel that uses API CMD for sending MGMT
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commands to the card and receives notifications from the MGMT modules on the
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card by AEQs. Also set the addresses of the IO CMDQs in HW.
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(hinic_hw_mgmt.c, hinic_hw_mgmt.h)
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IO components:
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==============
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Completion Event Queues(CEQs) - The completion Event Queues that describe IO
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tasks that are finished. (hinic_hw_eqs.c, hinic_hw_eqs.h)
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Work Queues(WQ) - Contain the memory and operations for use by CMD queues and
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the Queue Pairs. The WQ is a Memory Block in a Page. The Block contains
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pointers to Memory Areas that are the Memory for the Work Queue Elements(WQEs).
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(hinic_hw_wq.c, hinic_hw_wq.h)
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Command Queues(CMDQ) - The queues for sending commands for IO management and is
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used to set the QPs addresses in HW. The commands completion events are
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accumulated on the CEQ that is configured to receive the CMDQ completion events.
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(hinic_hw_cmdq.c, hinic_hw_cmdq.h)
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Queue Pairs(QPs) - The HW Receive and Send queues for Receiving and Transmitting
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Data. (hinic_hw_qp.c, hinic_hw_qp.h, hinic_hw_qp_ctxt.h)
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IO - de/constructs all the IO components. (hinic_hw_io.c, hinic_hw_io.h)
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HW device:
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==========
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HW device - de/constructs the HW Interface, the MGMT components on the
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initialization of the driver and the IO components on the case of Interface
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UP/DOWN Events. (hinic_hw_dev.c, hinic_hw_dev.h)
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hinic_dev contains the following components:
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===============================================
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PCI ID table - Contains the supported PCI Vendor/Device IDs.
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(hinic_pci_tbl.h)
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Port Commands - Send commands to the HW device for port management
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(MAC, Vlan, MTU, ...). (hinic_port.c, hinic_port.h)
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Tx Queues - Logical Tx Queues that use the HW Send Queues for transmit.
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The Logical Tx queue is not dependent on the format of the HW Send Queue.
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(hinic_tx.c, hinic_tx.h)
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Rx Queues - Logical Rx Queues that use the HW Receive Queues for receive.
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The Logical Rx queue is not dependent on the format of the HW Receive Queue.
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(hinic_rx.c, hinic_rx.h)
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hinic_dev - de/constructs the Logical Tx and Rx Queues.
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(hinic_main.c, hinic_dev.h)
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Miscellaneous:
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=============
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Common functions that are used by HW and Logical Device.
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(hinic_common.c, hinic_common.h)
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Support
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=======
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If an issue is identified with the released source code on the supported kernel
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with a supported adapter, email the specific information related to the issue to
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[email protected].

‎drivers/net/ethernet/Kconfig

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source "drivers/net/ethernet/fujitsu/Kconfig"
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source "drivers/net/ethernet/hisilicon/Kconfig"
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source "drivers/net/ethernet/hp/Kconfig"
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source "drivers/net/ethernet/huawei/Kconfig"
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source "drivers/net/ethernet/ibm/Kconfig"
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source "drivers/net/ethernet/intel/Kconfig"
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source "drivers/net/ethernet/i825xx/Kconfig"

‎drivers/net/ethernet/Makefile

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obj-$(CONFIG_NET_VENDOR_FUJITSU) += fujitsu/
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obj-$(CONFIG_NET_VENDOR_HISILICON) += hisilicon/
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obj-$(CONFIG_NET_VENDOR_HP) += hp/
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obj-$(CONFIG_NET_VENDOR_HUAWEI) += huawei/
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obj-$(CONFIG_NET_VENDOR_IBM) += ibm/
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obj-$(CONFIG_NET_VENDOR_INTEL) += intel/
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obj-$(CONFIG_NET_VENDOR_I825XX) += i825xx/

‎drivers/net/ethernet/huawei/Kconfig

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#
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# Huawei driver configuration
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#
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config NET_VENDOR_HUAWEI
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bool "Huawei devices"
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default y
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---help---
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If you have a network (Ethernet) card belonging to this class, say Y.
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Note that the answer to this question doesn't directly affect the
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kernel: saying N will just cause the configurator to skip all
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the questions about Huawei cards. If you say Y, you will be asked
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for your specific card in the following questions.
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if NET_VENDOR_HUAWEI
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source "drivers/net/ethernet/huawei/hinic/Kconfig"
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endif # NET_VENDOR_HUAWEI

‎drivers/net/ethernet/huawei/Makefile

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#
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# Makefile for the Huawei device drivers.
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#
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obj-$(CONFIG_HINIC) += hinic/

‎drivers/net/ethernet/huawei/hinic/Kconfig

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#
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# Huawei driver configuration
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#
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config HINIC
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tristate "Huawei Intelligent PCIE Network Interface Card"
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depends on (PCI_MSI && X86)
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default m
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---help---
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This driver supports HiNIC PCIE Ethernet cards.
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To compile this driver as part of the kernel, choose Y here.
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If unsure, choose N.
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The default is compiled as module.

‎drivers/net/ethernet/huawei/hinic/Makefile

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obj-$(CONFIG_HINIC) += hinic.o
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hinic-y := hinic_main.o hinic_hw_dev.o hinic_hw_if.o

‎drivers/net/ethernet/huawei/hinic/hinic_dev.h

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/*
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* Huawei HiNIC PCI Express Linux driver
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* Copyright(c) 2017 Huawei Technologies Co., Ltd
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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*/
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#ifndef HINIC_DEV_H
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#define HINIC_DEV_H
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#include <linux/netdevice.h>
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#include <linux/types.h>
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#include "hinic_hw_dev.h"
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#define HINIC_DRV_NAME "hinic"
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struct hinic_dev {
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struct net_device *netdev;
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struct hinic_hwdev *hwdev;
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u32 msg_enable;
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};
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#endif

‎drivers/net/ethernet/huawei/hinic/hinic_hw_csr.h

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/*
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* Huawei HiNIC PCI Express Linux driver
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* Copyright(c) 2017 Huawei Technologies Co., Ltd
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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*/
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#ifndef HINIC_HW_CSR_H
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#define HINIC_HW_CSR_H
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/* HW interface registers */
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#define HINIC_CSR_FUNC_ATTR0_ADDR 0x0
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#define HINIC_CSR_FUNC_ATTR1_ADDR 0x4
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#define HINIC_DMA_ATTR_BASE 0xC80
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#define HINIC_ELECTION_BASE 0x4200
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#define HINIC_DMA_ATTR_STRIDE 0x4
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#define HINIC_CSR_DMA_ATTR_ADDR(idx) \
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(HINIC_DMA_ATTR_BASE + (idx) * HINIC_DMA_ATTR_STRIDE)
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#define HINIC_PPF_ELECTION_STRIDE 0x4
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#define HINIC_CSR_MAX_PORTS 4
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#define HINIC_CSR_PPF_ELECTION_ADDR(idx) \
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(HINIC_ELECTION_BASE + (idx) * HINIC_PPF_ELECTION_STRIDE)
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#endif

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