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Commit c7d204e8 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin Committed by Roland Dreier
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IB/mthca: Fix reserved MTTs calculation on mem-free HCAs 



The reserved_mtts field has different meaning in Tavor and Arbel, so
we are wasting mtt entries on memfree. Fix the Arbel case to match
Tavor semantics.

Signed-off-by: default avatarMichael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent b038ced7

drivers/infiniband/hw/mthca/mthca_cmd.c

+5 −1
Original line number Diff line number Diff line
@@ -1051,6 +1051,10 @@ int mthca_QUERY_DEV_LIM(struct mthca_dev *dev, 
	MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_EQ_OFFSET);

	dev_lim->max_eqs = 1 << (field & 0x7);

	MTHCA_GET(field, outbox, QUERY_DEV_LIM_RSVD_MTT_OFFSET);

	if (mthca_is_memfree(dev))

		dev_lim->reserved_mtts = ALIGN((1 << (field >> 4)) * sizeof(u64),

					       MTHCA_MTT_SEG_SIZE) / MTHCA_MTT_SEG_SIZE;

	else

		dev_lim->reserved_mtts = 1 << (field >> 4);

	MTHCA_GET(field, outbox, QUERY_DEV_LIM_MAX_MRW_SZ_OFFSET);

	dev_lim->max_mrw_sz = 1 << field;