• Eli Cohen's avatar
    mlx4_core: resource tracking for HCA resources used by guests · c82e9aa0
    Eli Cohen authored
    The resource tracker is used to track usage of HCA resources by the different
    guests.
    
    Virtual functions (VFs) are attached to guest operating systems but
    resources are allocated from the same pool and are assigned to VFs. It is
    essential that hostile/buggy guests not be able to affect the operation of
    other VFs, possibly attached to other guest OSs since ConnectX firmware is not
    tolerant to misuse of resources.
    
    The resource tracker module associates each resource with a VF and maintains
    state information for the allocated object. It also defines allowed state
    transitions and enforces them.
    
    Relationships between resources are also referred to. For example, CQs are
    pointed to by QPs, so it is forbidden to destroy a CQ if a QP refers to it.
    
    ICM memory is always accessible through the primary function and hence it is
    allocated by the owner of the primary function.
    
    When a guest dies, an FLR is generated for all the VFs it owns and all the
    resources it used are freed.
    
    The tracked resource types are: QPs, CQs, SRQs, MPTs, MTTs, MACs, RES_EQs,
    and XRCDNs.
    Signed-off-by: default avatarEli Cohen <eli@mellanox.co.il>
    Signed-off-by: default avatarJack Morgenstein <jackm@dev.mellanox.co.il>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    c82e9aa0
Makefile 363 Bytes