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    Subject[PATCH v6 03/21] IB/hns: Add initial main frame driver and get cfg info
    Date
    This patch mainly added the initial bare main driver. It
    could get the relative configure information of net node.

    Signed-off-by: Wei Hu <xavier.huwei@huawei.com>
    Signed-off-by: Nenglong Zhao <zhaonenglong@hisilicon.com>
    Signed-off-by: Lijun Ou <oulijun@huawei.com>
    ---
    drivers/infiniband/hw/hns/hns_roce_device.h | 49 ++++++++
    drivers/infiniband/hw/hns/hns_roce_main.c | 182 ++++++++++++++++++++++++++++
    2 files changed, 231 insertions(+)
    create mode 100644 drivers/infiniband/hw/hns/hns_roce_device.h
    create mode 100644 drivers/infiniband/hw/hns/hns_roce_main.c

    diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
    new file mode 100644
    index 0000000..b48f518
    --- /dev/null
    +++ b/drivers/infiniband/hw/hns/hns_roce_device.h
    @@ -0,0 +1,49 @@
    +/*
    + * Copyright (c) 2016 Hisilicon Limited.
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License as published by
    + * the Free Software Foundation; either version 2 of the License, or
    + * (at your option) any later version.
    + */
    +
    +#ifndef _HNS_ROCE_DEVICE_H
    +#define _HNS_ROCE_DEVICE_H
    +
    +#include <linux/platform_device.h>
    +#include <linux/radix-tree.h>
    +#include <linux/semaphore.h>
    +#include <rdma/ib_addr.h>
    +#include <rdma/ib_smi.h>
    +#include <rdma/ib_umem.h>
    +#include <rdma/ib_user_verbs.h>
    +#include <rdma/ib_verbs.h>
    +
    +#define DRV_NAME "hns_roce"
    +
    +#define HNS_ROCE_MAX_IRQ_NUM 34
    +#define HNS_ROCE_MAX_PORTS 6
    +
    +struct hns_roce_ib_iboe {
    + struct net_device *netdevs[HNS_ROCE_MAX_PORTS];
    + u8 phy_port[HNS_ROCE_MAX_PORTS];
    +};
    +
    +struct hns_roce_caps {
    + u8 num_ports;
    +};
    +
    +struct hns_roce_dev {
    + struct ib_device ib_dev;
    + struct platform_device *pdev;
    + struct hns_roce_ib_iboe iboe;
    +
    + int irq[HNS_ROCE_MAX_IRQ_NUM];
    + u8 __iomem *reg_base;
    + struct hns_roce_caps caps;
    +
    + int cmd_mod;
    + int loop_idc;
    +};
    +
    +#endif /* _HNS_ROCE_DEVICE_H */
    diff --git a/drivers/infiniband/hw/hns/hns_roce_main.c b/drivers/infiniband/hw/hns/hns_roce_main.c
    new file mode 100644
    index 0000000..1616148
    --- /dev/null
    +++ b/drivers/infiniband/hw/hns/hns_roce_main.c
    @@ -0,0 +1,182 @@
    +/*
    + * Copyright (c) 2016 Hisilicon Limited.
    + *
    + * Authors: Wei Hu <xavier.huwei@huawei.com>
    + * Authors: Nenglong Zhao <zhaonenglong@hisilicon.com>
    + * Authors: Lijun Ou <oulijun@huawei.com>
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License as published by
    + * the Free Software Foundation; either version 2 of the License, or
    + * (at your option) any later version.
    + *
    + */
    +
    +#include <linux/cdev.h>
    +#include <linux/delay.h>
    +#include <linux/device.h>
    +#include <linux/dma-mapping.h>
    +#include <linux/ethtool.h>
    +#include <linux/etherdevice.h>
    +#include <linux/fs.h>
    +#include <linux/init.h>
    +#include <linux/interrupt.h>
    +#include <linux/kernel.h>
    +#include <linux/list.h>
    +#include <linux/module.h>
    +#include <linux/netdevice.h>
    +#include <linux/of.h>
    +#include <linux/of_address.h>
    +#include <linux/of_net.h>
    +#include <linux/of_platform.h>
    +#include <linux/platform_device.h>
    +#include <linux/slab.h>
    +#include <linux/netdevice.h>
    +#include <net/ipv6.h>
    +#include <net/addrconf.h>
    +#include <rdma/ib_addr.h>
    +#include <rdma/ib_smi.h>
    +#include <rdma/ib_umem.h>
    +#include <rdma/ib_user_verbs.h>
    +#include <rdma/ib_verbs.h>
    +#include "hns_roce_device.h"
    +
    +int hns_roce_get_cfg(struct hns_roce_dev *hr_dev)
    +{
    + int i;
    + u8 phy_port;
    + int port_cnt = 0;
    + struct device *dev = &hr_dev->pdev->dev;
    + struct device_node *np = dev->of_node;
    + struct device_node *net_node;
    + struct net_device *netdev = NULL;
    + struct platform_device *pdev = NULL;
    + struct resource *res;
    +
    + if (!of_device_is_compatible(np, "hisilicon,hns-roce-v1")) {
    + dev_err(dev, "device no compatible!\n");
    + return -EINVAL;
    + }
    +
    + res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
    + hr_dev->reg_base = devm_ioremap_resource(dev, res);
    + if (!hr_dev->reg_base) {
    + dev_err(dev, "devm_ioremap_resource failed!\n");
    + return -ENOMEM;
    + }
    +
    + for (i = 0; i < HNS_ROCE_MAX_PORTS; i++) {
    + net_node = of_parse_phandle(np, "eth-handle", i);
    + if (net_node) {
    + pdev = of_find_device_by_node(net_node);
    + netdev = platform_get_drvdata(pdev);
    + phy_port = (u8)i;
    + if (netdev) {
    + hr_dev->iboe.netdevs[port_cnt] = netdev;
    + hr_dev->iboe.phy_port[port_cnt] = phy_port;
    + } else {
    + return -ENODEV;
    + }
    + port_cnt++;
    + }
    + }
    +
    + hr_dev->caps.num_ports = port_cnt;
    +
    + /* Cmd issue mode: 0 is poll, 1 is event */
    + hr_dev->cmd_mod = 1;
    + hr_dev->loop_idc = 0;
    +
    + for (i = 0; i < HNS_ROCE_MAX_IRQ_NUM; i++) {
    + hr_dev->irq[i] = platform_get_irq(hr_dev->pdev, i);
    + if (hr_dev->irq[i] <= 0) {
    + dev_err(dev, "Get No.%d irq resource failed!\n", i);
    + return -EINVAL;
    + }
    + }
    +
    + return 0;
    +}
    +
    +/**
    +* hns_roce_probe - RoCE driver entrance
    +* @pdev: pointer to platform device
    +* Return : int
    +*
    +*/
    +static int hns_roce_probe(struct platform_device *pdev)
    +{
    + int ret;
    + struct hns_roce_dev *hr_dev;
    + struct device *dev = &pdev->dev;
    +
    + hr_dev = (struct hns_roce_dev *)ib_alloc_device(sizeof(*hr_dev));
    + if (!hr_dev) {
    + dev_err(dev, "Device struct alloc failed, aborting.\n");
    + return -ENOMEM;
    + }
    +
    + memset((u8 *)hr_dev + sizeof(struct ib_device), 0,
    + sizeof(struct hns_roce_dev) - sizeof(struct ib_device));
    +
    + hr_dev->pdev = pdev;
    + platform_set_drvdata(pdev, hr_dev);
    +
    + if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64ULL)))
    + dev_info(dev, "set mask to 64bit\n");
    + else if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32ULL)))
    + dev_info(dev, "set mask to 32bit\n");
    + else {
    + dev_err(dev, "No usable DMA addressing mode\n");
    + ret = -EIO;
    + goto error_failed_get_cfg;
    + }
    +
    + ret = hns_roce_get_cfg(hr_dev);
    + if (ret) {
    + dev_err(dev, "Get Configuration failed!\n");
    + goto error_failed_get_cfg;
    + }
    +
    +error_failed_get_cfg:
    + ib_dealloc_device(&hr_dev->ib_dev);
    +
    + return ret;
    +}
    +
    +/**
    +* hns_roce_remove - remove roce device
    +* @pdev: pointer to platform device
    +*/
    +static int hns_roce_remove(struct platform_device *pdev)
    +{
    + struct hns_roce_dev *hr_dev = platform_get_drvdata(pdev);
    +
    + ib_dealloc_device(&hr_dev->ib_dev);
    +
    + return 0;
    +}
    +
    +static const struct of_device_id hns_roce_of_match[] = {
    + { .compatible = "hisilicon,hns-roce-v1",},
    + {},
    +};
    +MODULE_DEVICE_TABLE(of, hns_roce_of_match);
    +
    +static struct platform_driver hns_roce_driver = {
    + .probe = hns_roce_probe,
    + .remove = hns_roce_remove,
    + .driver = {
    + .name = DRV_NAME,
    + .of_match_table = hns_roce_of_match,
    + },
    +};
    +
    +module_platform_driver(hns_roce_driver);
    +
    +MODULE_LICENSE("GPL v2");
    +MODULE_AUTHOR("Wei Hu <xavier.huwei@huawei.com>");
    +MODULE_AUTHOR("Nenglong Zhao <zhaonenglong@hisilicon.com>");
    +MODULE_AUTHOR("Lijun Ou <oulijun@huawei.com>");
    +MODULE_DESCRIPTION("HISILICON RoCE driver");
    +MODULE_ALIAS("platform:" DRV_NAME);
    --
    1.9.1
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      Last update: 2016-04-28 14:21    [W:4.300 / U:0.228 seconds]
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