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Jack Morgensteinrolandd
Jack Morgenstein
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mlx4: Add alias_guid mechanism
For IB ports, we paravirtualize the GUID at index 0 on slaves. The GUID at index 0 seen by a slave is the actual GUID occupying the GUID table at the slave-id index. The driver, by default, requests at startup time that subnet manager populate its entire guid table with GUIDs. These guids are then mapped (paravirtualized) to the slaves, and appear for each slave as its GUID at index 0. Until each slave has such a guid, its port status is DOWN. The guid table is cached to support special QP paravirtualization, and event propagation to slaves on guid change (we test to see if the guid really changed before propagating an event to the slave). To support this caching, add capability to __mlx4_ib_query_gid() to obtain the network view (i.e., physical view) gid at index X, not just the host (paravirtualized) view. Based on a patch from Erez Shitrit <erezsh@mellanox.com> Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Roland Dreier <roland@purestorage.com>
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‎drivers/infiniband/hw/mlx4/Makefile

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obj-$(CONFIG_MLX4_INFINIBAND) += mlx4_ib.o
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mlx4_ib-y := ah.o cq.o doorbell.o mad.o main.o mr.o qp.o srq.o mcg.o cm.o
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mlx4_ib-y := ah.o cq.o doorbell.o mad.o main.o mr.o qp.o srq.o mcg.o cm.o alias_GUID.o

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