From: Bart Van Assche Date: Mon, 26 Sep 2016 16:09:42 +0000 (-0700) Subject: IB/core: Improve ib_map_mr_sg() documentation X-Git-Tag: v4.14-rc1~2318^2~6 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=52746129e02998fb45942aed359e77e63def4997;p=platform%2Fkernel%2Flinux-rpi.git IB/core: Improve ib_map_mr_sg() documentation Document that ib_map_mr_sg() is able to map physically discontiguous sg-lists as a single MR. Change IB_MR_TYPE_SG_GAPS_REG into IB_MR_TYPE_SG_GAPS. Signed-off-by: Bart Van Assche Cc: Sagi Grimberg Cc: Christoph Hellwig Reviewed-by: Christoph Hellwig Reviewed-by: Sagi Grimberg Signed-off-by: Doug Ledford --- diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index d4ef3b1..1c6b2a4 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -1811,13 +1811,13 @@ EXPORT_SYMBOL(ib_set_vf_guid); * * Constraints: * - The first sg element is allowed to have an offset. - * - Each sg element must be aligned to page_size (or physically - * contiguous to the previous element). In case an sg element has a - * non contiguous offset, the mapping prefix will not include it. + * - Each sg element must either be aligned to page_size or virtually + * contiguous to the previous element. In case an sg element has a + * non-contiguous offset, the mapping prefix will not include it. * - The last sg element is allowed to have length less than page_size. * - If sg_nents total byte length exceeds the mr max_num_sge * page_size * then only max_num_sg entries will be mapped. - * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS_REG, non of these + * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these * constraints holds and the page_size argument is ignored. * * Returns the number of sg elements that were mapped to the memory region.