Re: [PATCH for-next 1/2] RDMA/hns: Refactor hns uar mmap flow

[liweihang <liweihang@huawei.com>]

On 2021/6/2 19:16, Leon Romanovsky wrote:
> On Fri, May 28, 2021 at 05:19:04PM +0800, Weihang Li wrote:
>> From: Xi Wang <wangxi11@huawei.com>
>>
>> Classify the uar address by wrapping the uar type and start page as offset
>> for hns rdma io mmap.
>>
>> Signed-off-by: Xi Wang <wangxi11@huawei.com>
>> Signed-off-by: Weihang Li <liweihang@huawei.com>
>> ---
>>  drivers/infiniband/hw/hns/hns_roce_main.c | 27 ++++++++++++++++++++++++---
>>  include/uapi/rdma/hns-abi.h               |  4 ++++
>>  2 files changed, 28 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/infiniband/hw/hns/hns_roce_main.c b/drivers/infiniband/hw/hns/hns_roce_main.c
>> index 6c6e82b..00dbbf1 100644
>> --- a/drivers/infiniband/hw/hns/hns_roce_main.c
>> +++ b/drivers/infiniband/hw/hns/hns_roce_main.c
>> @@ -338,12 +338,23 @@ static void hns_roce_dealloc_ucontext(struct ib_ucontext *ibcontext)
>>  	hns_roce_uar_free(to_hr_dev(ibcontext->device), &context->uar);
>>  }
>>  
>> -static int hns_roce_mmap(struct ib_ucontext *context,
>> -			 struct vm_area_struct *vma)
>> +/* command value is offset[15:8] */
>> +static inline int hns_roce_mmap_get_command(unsigned long offset)
>> +{
>> +	return (offset >> 8) & 0xff;
>> +}
>> +
>> +/* index value is offset[63:16] | offset[7:0] */
>> +static inline unsigned long hns_roce_mmap_get_index(unsigned long offset)
>> +{
>> +	return ((offset >> 16) << 8) | (offset & 0xff);
>> +}
> 
> Let's follow the common practice and don't introduce inline functions in .c files.
> 
> Thanks
> 

Sure, thanks.

Weihang