Re: [PATCH 4/6] IB/core: Enhance ib_map_mr_sg()

[Bart Van Assche <bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>]

On 05/11/2016 12:54 AM, Leon Romanovsky wrote:
> On Tue, May 10, 2016 at 05:14:57PM -0700, Bart Van Assche wrote:
>> The SRP initiator allows to set max_sectors to a value that exceeds
>> the largest amount of data that can be mapped at once with an mlx4
>> HCA using fast registration and a page size of 4 KB. Hence modify
>> ib_map_mr_sg() such that it can map partial sg-elements. If an
>> sg-element has been mapped partially, let the caller know
>> which fraction has been mapped by adjusting *sg_offset.
>>
>> Signed-off-by: Bart Van Assche <bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
>> Cc: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
>> Cc: Sagi Grimberg <sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
>> Cc: Laurence Oberman <loberman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
>> ---
>> --- a/drivers/infiniband/hw/mlx5/mr.c
>> +++ b/drivers/infiniband/hw/mlx5/mr.c
>> @@ -1752,10 +1752,11 @@ static int
>>   mlx5_ib_sg_to_klms(struct mlx5_ib_mr *mr,
>>   		   struct scatterlist *sgl,
>>   		   unsigned short sg_nents,
>> -		   unsigned int sg_offset)
>> +		   unsigned int *sg_offset_p)
>>   {
>
> I wonder on which tree are you basing?
> In Linus (4.6-rc7) the function signature is different [1], the same
> goes for my tree and Doug's for-4.7 branch [2].

Hello Leon,

Sorry that I hadn't mentioned this explicitly in the cover letter of 
this patch series but this patch series is based on Christoph's generic 
RDMA READ/WRITE API work.

Bart.

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