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Commit fd02e803 authored by Eli Cohen's avatar Eli Cohen Committed by Roland Dreier
Browse files

IB/mthca: Query SRQ srq_limit fixes 



Fix endianness handling of srq_limit: it is big-endian in the context
structure, so we need to swab it before returning it.

Also add support for srq_limit query for Tavor (non-MemFree) HCAs.

Signed-off-by: default avatarEli Cohen <eli@mellanox.co.il>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent bfef73fa

drivers/infiniband/hw/mthca/mthca_srq.c

+8 −4
Original line number Diff line number Diff line
@@ -49,7 +49,8 @@ struct mthca_tavor_srq_context { 
	__be32 state_pd;

	__be32 lkey;

	__be32 uar;

	__be32 wqe_cnt;

	__be16 limit_watermark;

	__be16 wqe_cnt;

	u32    reserved[2];

};
@@ -369,6 +370,7 @@ int mthca_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr) 
	struct mthca_srq *srq = to_msrq(ibsrq);

	struct mthca_mailbox *mailbox;

	struct mthca_arbel_srq_context *arbel_ctx;

	struct mthca_tavor_srq_context *tavor_ctx;

	u8 status;

	int err;
@@ -382,9 +384,11 @@ int mthca_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr) 


	if (mthca_is_memfree(dev)) {

		arbel_ctx = mailbox->buf;

		srq_attr->srq_limit = arbel_ctx->limit_watermark;

	} else

		srq_attr->srq_limit = 0;

		srq_attr->srq_limit = be16_to_cpu(arbel_ctx->limit_watermark);

	} else {

		tavor_ctx = mailbox->buf;

		srq_attr->srq_limit = be16_to_cpu(tavor_ctx->limit_watermark);

	}



	srq_attr->max_wr  = (mthca_is_memfree(dev)) ? srq->max - 1 : srq->max;

	srq_attr->max_sge = srq->max_gs;