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    net: hns: Add support of ACPI to HNS driver RoCE Reset function · d605916b
    Salil 提交于
    In the Hip06 SoC, the RoCE Engine is part of the Hisilicon Network
    Subsystem and is dependent upon DSAF module. Therefore, certain
    functions like RESET are exposed through the common registers of
    HNS DSAF module which are memory-mapped by the HNS driver and
    currently can only be accessed through DT/syscon interface.
    
    This patch adds the support of ACPI to the existing RoCE reset
    function in the HNS driver(please refer NOTE 2). Hisilicon RoCE
    driver (please refer NOTE 1) shall call this reset function during
    probe time to reset the RoCE Engine.
    
    The HNS Reset function indirectly ends up in calling the _DSM()
    function part of the DSDT ACPI Table. Actual reset functionality
    for ACPI is implemented within the ACPI DSDT Table which also has
    been enhanced to support this change.
    
    Support of ACPI in the HNS RoCE driver shall be pushed through a
    different accompanying below patch:
    "IB/hns: Add support of ACPI to the Hisilicon RoCE Driver"
    
    NOTE 1: HNS RoCE driver has already been accepted by its maintainer
    Doug Ledford<dledford@redhat.com>. Please refer below link:
    https://www.spinics.net/lists/linux-rdma/msg38850.html
    
    NOTE 2: RoCE reset function patch has been accepted and now is
    part of the net-next:
    https://www.mail-archive.com/netdev@vger.kernel.org/msg123867.htmlSigned-off-by: NSalil Mehta <salil.mehta@huawei.com>
    Reviewed-by: NYisen Zhuang <yisen.zhuang@huawei.com>
    Signed-off-by: NDoug Ledford <dledford@redhat.com>
    d605916b
hns_dsaf_main.c 84.3 KB