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882214e2b1
* Add an interval tree implementation for ODP umems. Create an interval tree for each ucontext (including a count of the number of ODP MRs in this context, semaphore, etc.), and register ODP umems in the interval tree. * Add MMU notifiers handling functions, using the interval tree to notify only the relevant umems and underlying MRs. * Register to receive MMU notifier events from the MM subsystem upon ODP MR registration (and unregister accordingly). * Add a completion object to synchronize the destruction of ODP umems. * Add mechanism to abort page faults when there's a concurrent invalidation. The way we synchronize between concurrent invalidations and page faults is by keeping a counter of currently running invalidations, and a sequence number that is incremented whenever an invalidation is caught. The page fault code checks the counter and also verifies that the sequence number hasn't progressed before it updates the umem's page tables. This is similar to what the kvm module does. In order to prevent the case where we register a umem in the middle of an ongoing notifier, we also keep a per ucontext counter of the total number of active mmu notifiers. We only enable new umems when all the running notifiers complete. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Shachar Raindel <raindel@mellanox.com> Signed-off-by: Haggai Eran <haggaie@mellanox.com> Signed-off-by: Yuval Dagan <yuvalda@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
79 lines
2.5 KiB
Plaintext
79 lines
2.5 KiB
Plaintext
menuconfig INFINIBAND
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tristate "InfiniBand support"
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depends on PCI || BROKEN
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depends on HAS_IOMEM
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depends on NET
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depends on INET
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depends on m || IPV6 != m
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---help---
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Core support for InfiniBand (IB). Make sure to also select
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any protocols you wish to use as well as drivers for your
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InfiniBand hardware.
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if INFINIBAND
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config INFINIBAND_USER_MAD
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tristate "InfiniBand userspace MAD support"
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depends on INFINIBAND
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---help---
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Userspace InfiniBand Management Datagram (MAD) support. This
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is the kernel side of the userspace MAD support, which allows
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userspace processes to send and receive MADs. You will also
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need libibumad from <http://www.openfabrics.org/downloads/management/>.
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config INFINIBAND_USER_ACCESS
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tristate "InfiniBand userspace access (verbs and CM)"
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select ANON_INODES
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---help---
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Userspace InfiniBand access support. This enables the
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kernel side of userspace verbs and the userspace
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communication manager (CM). This allows userspace processes
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to set up connections and directly access InfiniBand
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hardware for fast-path operations. You will also need
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libibverbs, libibcm and a hardware driver library from
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<http://www.openfabrics.org/git/>.
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config INFINIBAND_USER_MEM
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bool
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depends on INFINIBAND_USER_ACCESS != n
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default y
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config INFINIBAND_ON_DEMAND_PAGING
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bool "InfiniBand on-demand paging support"
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depends on INFINIBAND_USER_MEM
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select MMU_NOTIFIER
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default y
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---help---
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On demand paging support for the InfiniBand subsystem.
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Together with driver support this allows registration of
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memory regions without pinning their pages, fetching the
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pages on demand instead.
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config INFINIBAND_ADDR_TRANS
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bool
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depends on INFINIBAND
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default y
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source "drivers/infiniband/hw/mthca/Kconfig"
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source "drivers/infiniband/hw/ipath/Kconfig"
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source "drivers/infiniband/hw/qib/Kconfig"
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source "drivers/infiniband/hw/ehca/Kconfig"
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source "drivers/infiniband/hw/amso1100/Kconfig"
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source "drivers/infiniband/hw/cxgb3/Kconfig"
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source "drivers/infiniband/hw/cxgb4/Kconfig"
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source "drivers/infiniband/hw/mlx4/Kconfig"
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source "drivers/infiniband/hw/mlx5/Kconfig"
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source "drivers/infiniband/hw/nes/Kconfig"
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source "drivers/infiniband/hw/ocrdma/Kconfig"
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source "drivers/infiniband/hw/usnic/Kconfig"
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source "drivers/infiniband/ulp/ipoib/Kconfig"
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source "drivers/infiniband/ulp/srp/Kconfig"
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source "drivers/infiniband/ulp/srpt/Kconfig"
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source "drivers/infiniband/ulp/iser/Kconfig"
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source "drivers/infiniband/ulp/isert/Kconfig"
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endif # INFINIBAND
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