net-next/hinic: Initialize hw interface

Initialize hw interface as part of the nic initialization for accessing hw.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/hinic.txt

@@ -0,0 +1,125 @@
+Linux Kernel Driver for Huawei Intelligent NIC(HiNIC) family
+============================================================
+
+Overview:
+=========
+HiNIC is a network interface card for the Data Center Area.
+
+The driver supports a range of link-speed devices (10GbE, 25GbE, 40GbE, etc.).
+The driver supports also a negotiated and extendable feature set.
+
+Some HiNIC devices support SR-IOV. This driver is used for Physical Function
+(PF).
+
+HiNIC devices support MSI-X interrupt vector for each Tx/Rx queue and
+adaptive interrupt moderation.
+
+HiNIC devices support also various offload features such as checksum offload,
+TCP Transmit Segmentation Offload(TSO), Receive-Side Scaling(RSS) and
+LRO(Large Receive Offload).
+
+
+Supported PCI vendor ID/device IDs:
+===================================
+
+19e5:1822 - HiNIC PF
+
+
+Driver Architecture and Source Code:
+====================================
+
+hinic_dev - Implement a Logical Network device that is independent from
+specific HW details about HW data structure formats.
+
+hinic_hwdev - Implement the HW details of the device and include the components
+for accessing the PCI NIC.
+
+hinic_hwdev contains the following components:
+===============================================
+
+HW Interface:
+=============
+
+The interface for accessing the pci device (DMA memory and PCI BARs).
+(hinic_hw_if.c, hinic_hw_if.h)
+
+Configuration Status Registers Area that describes the HW Registers on the
+configuration and status BAR0. (hinic_hw_csr.h)
+
+MGMT components:
+================
+
+Asynchronous Event Queues(AEQs) - The event queues for receiving messages from
+the MGMT modules on the cards. (hinic_hw_eqs.c, hinic_hw_eqs.h)
+
+Application Programmable Interface commands(API CMD) - Interface for sending
+MGMT commands to the card. (hinic_hw_api_cmd.c, hinic_hw_api_cmd.h)
+
+Management (MGMT) - the PF to MGMT channel that uses API CMD for sending MGMT
+commands to the card and receives notifications from the MGMT modules on the
+card by AEQs. Also set the addresses of the IO CMDQs in HW.
+(hinic_hw_mgmt.c, hinic_hw_mgmt.h)
+
+IO components:
+==============
+
+Completion Event Queues(CEQs) - The completion Event Queues that describe IO
+tasks that are finished. (hinic_hw_eqs.c, hinic_hw_eqs.h)
+
+Work Queues(WQ) - Contain the memory and operations for use by CMD queues and
+the Queue Pairs. The WQ is a Memory Block in a Page. The Block contains
+pointers to Memory Areas that are the Memory for the Work Queue Elements(WQEs).
+(hinic_hw_wq.c, hinic_hw_wq.h)
+
+Command Queues(CMDQ) - The queues for sending commands for IO management and is
+used to set the QPs addresses in HW. The commands completion events are
+accumulated on the CEQ that is configured to receive the CMDQ completion events.
+(hinic_hw_cmdq.c, hinic_hw_cmdq.h)
+
+Queue Pairs(QPs) - The HW Receive and Send queues for Receiving and Transmitting
+Data. (hinic_hw_qp.c, hinic_hw_qp.h, hinic_hw_qp_ctxt.h)
+
+IO - de/constructs all the IO components. (hinic_hw_io.c, hinic_hw_io.h)
+
+HW device:
+==========
+
+HW device - de/constructs the HW Interface, the MGMT components on the
+initialization of the driver and the IO components on the case of Interface
+UP/DOWN Events. (hinic_hw_dev.c, hinic_hw_dev.h)
+
+
+hinic_dev contains the following components:
+===============================================
+
+PCI ID table - Contains the supported PCI Vendor/Device IDs.
+(hinic_pci_tbl.h)
+
+Port Commands - Send commands to the HW device for port management
+(MAC, Vlan, MTU, ...). (hinic_port.c, hinic_port.h)
+
+Tx Queues - Logical Tx Queues that use the HW Send Queues for transmit.
+The Logical Tx queue is not dependent on the format of the HW Send Queue.
+(hinic_tx.c, hinic_tx.h)
+
+Rx Queues - Logical Rx Queues that use the HW Receive Queues for receive.
+The Logical Rx queue is not dependent on the format of the HW Receive Queue.
+(hinic_rx.c, hinic_rx.h)
+
+hinic_dev - de/constructs the Logical Tx and Rx Queues.
+(hinic_main.c, hinic_dev.h)
+
+
+Miscellaneous:
+=============
+
+Common functions that are used by HW and Logical Device.
+(hinic_common.c, hinic_common.h)
+
+
+Support
+=======
+
+If an issue is identified with the released source code on the supported kernel
+with a supported adapter, email the specific information related to the issue to
+aviad.krawczyk@huawei.com.

drivers/net/ethernet/Kconfig

@@ -78,6 +78,7 @@ source "drivers/net/ethernet/freescale/Kconfig"
 source "drivers/net/ethernet/fujitsu/Kconfig"
 source "drivers/net/ethernet/hisilicon/Kconfig"
 source "drivers/net/ethernet/hp/Kconfig"
+source "drivers/net/ethernet/huawei/Kconfig"
 source "drivers/net/ethernet/ibm/Kconfig"
 source "drivers/net/ethernet/intel/Kconfig"
 source "drivers/net/ethernet/i825xx/Kconfig"

drivers/net/ethernet/Makefile

@@ -41,6 +41,7 @@ obj-$(CONFIG_NET_VENDOR_FREESCALE) += freescale/
 obj-$(CONFIG_NET_VENDOR_FUJITSU) += fujitsu/
 obj-$(CONFIG_NET_VENDOR_HISILICON) += hisilicon/
 obj-$(CONFIG_NET_VENDOR_HP) += hp/
+obj-$(CONFIG_NET_VENDOR_HUAWEI) += huawei/
 obj-$(CONFIG_NET_VENDOR_IBM) += ibm/
 obj-$(CONFIG_NET_VENDOR_INTEL) += intel/
 obj-$(CONFIG_NET_VENDOR_I825XX) += i825xx/

drivers/net/ethernet/huawei/Kconfig

@@ -0,0 +1,19 @@
+#
+# Huawei driver configuration
+#
+
+config NET_VENDOR_HUAWEI
+	bool "Huawei devices"
+	default y
+	---help---
+	  If you have a network (Ethernet) card belonging to this class, say Y.
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about Huawei cards. If you say Y, you will be asked
+	  for your specific card in the following questions.
+
+if NET_VENDOR_HUAWEI
+
+source "drivers/net/ethernet/huawei/hinic/Kconfig"
+
+endif # NET_VENDOR_HUAWEI

drivers/net/ethernet/huawei/Makefile

@@ -0,0 +1,5 @@
+#
+# Makefile for the Huawei device drivers.
+#
+
+obj-$(CONFIG_HINIC) += hinic/

drivers/net/ethernet/huawei/hinic/Kconfig

@@ -0,0 +1,13 @@
+#
+# Huawei driver configuration
+#
+
+config HINIC
+	tristate "Huawei Intelligent PCIE Network Interface Card"
+	depends on (PCI_MSI && X86)
+	default m
+	---help---
+	  This driver supports HiNIC PCIE Ethernet cards.
+	  To compile this driver as part of the kernel, choose Y here.
+	  If unsure, choose N.
+	  The default is compiled as module.

drivers/net/ethernet/huawei/hinic/Makefile

@@ -0,0 +1,3 @@
+obj-$(CONFIG_HINIC) += hinic.o
+
+hinic-y := hinic_main.o hinic_hw_dev.o hinic_hw_if.o

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

@@ -0,0 +1,33 @@
+/*
+ * Huawei HiNIC PCI Express Linux driver
+ * Copyright(c) 2017 Huawei Technologies Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ */
+
+#ifndef HINIC_DEV_H
+#define HINIC_DEV_H
+
+#include <linux/netdevice.h>
+#include <linux/types.h>
+
+#include "hinic_hw_dev.h"
+
+#define HINIC_DRV_NAME          "hinic"
+
+struct hinic_dev {
+	struct net_device               *netdev;
+	struct hinic_hwdev              *hwdev;
+
+	u32                             msg_enable;
+};
+
+#endif

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

@@ -0,0 +1,36 @@
+/*
+ * Huawei HiNIC PCI Express Linux driver
+ * Copyright(c) 2017 Huawei Technologies Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ */
+
+#ifndef HINIC_HW_CSR_H
+#define HINIC_HW_CSR_H
+
+/* HW interface registers */
+#define HINIC_CSR_FUNC_ATTR0_ADDR                       0x0
+#define HINIC_CSR_FUNC_ATTR1_ADDR                       0x4
+
+#define HINIC_DMA_ATTR_BASE                             0xC80
+#define HINIC_ELECTION_BASE                             0x4200
+
+#define HINIC_DMA_ATTR_STRIDE                           0x4
+#define HINIC_CSR_DMA_ATTR_ADDR(idx)                    \
+	(HINIC_DMA_ATTR_BASE + (idx) * HINIC_DMA_ATTR_STRIDE)
+
+#define HINIC_PPF_ELECTION_STRIDE                       0x4
+#define HINIC_CSR_MAX_PORTS                             4
+
+#define HINIC_CSR_PPF_ELECTION_ADDR(idx)                \
+	(HINIC_ELECTION_BASE +  (idx) * HINIC_PPF_ELECTION_STRIDE)
+
+#endif