Wall time obtained from ktime_get_real_ns is susceptible to sudden jumps due to
user setting the time or due to NTP. Boot time is constantly increasing time
better suited for comparing two timestamps.
Signed-off-by: Abhilash Jindal <klock.android@gmail.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
As part of enabling single ported VFs over IB ports we need to handle
some of the flows for generting EQ events for VFs which don't come
into play under Eth ports.
This mainly includes port management events derived from changes of the
phyiscal port (lid change, client re-register, down/up, etc), VF pkey table
changes and VF guid changes initiated by the IB driver.
(1) make sure that events are generated only for VFs sitting on
the relevant physical port (under the ALL_SLAVES flow).
(2) before generating the event, convert from physical (one or two)
to VF port (always equals one).
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
Request GIDs from the SM on demand, i.e., when a VF actually needs them,
and release them when the GIDs are no longer in use.
In cloud environments, this is useful for GID migrations, in which a
GID is assigned to a VF on the destination HCA, while the VF on the
source HCA is shutdown (but the GID was not administratively released).
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Change the init flow to ask GUIDs only for active VFs. This is done for
both SM & HOST modes so that there is no need any more to maintain the
ownership record type.
In case SM mode is used, the initial value will be 0, ask the SM to assign,
for the HOST mode the initial value will be the HOST generated GUID.
This will enable out of the box experience for both probed and attached VFs.
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Set the admin alias GUID per the administrator's request via the sysfs
mechanism into the core layer.
The "get" request returns the current value. However, if the administrator
requests the SM to assign a new value by requesting 0, the SM assigned
GUID is returned.
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
If the SM rejects an alias GUID request the PF driver keeps trying to acquire
the specified GUID indefinitely, utilizing an exponential backoff scheme.
Retrying is managed per GUID entry. Each entry that wasn't applied holds its
next retry information. Retry requests to the SM consist of records of 8
consecutive GUIDS. Each record that contains GUIDs requiring retries holds its
next time-to-run based on the retry information of all its GUID entries. The
record having the lowest retry time will run first when that retry time
arrives.
Since the method (SET or DELETE) as sent to the SM applies to all the GUIDs in
the record, we must handle SET requests and DELETE requests in separate SM
messages (one for SETs and the other for DELETEs).
To avoid race conditions where a GUID entry request (set or delete) was
modified after the SM request was sent, we save the method and the requested
indices as part of the callback's context -- thus, only the requested indexes
are evaluated when the response is received.
When an GUID entry is approved we turn off its retry-required bit, this
prevents redundant SM retries from occurring on that record.
The port down event should be sent only when previously it was up. Likewise,
the port up event should be sent only if previously the port was down.
Synchronization was added around the flows that change entries and record state
to prevent race conditions.
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Maintain a persistent memory that should survive reset flow/PCI error.
This comes as a preparation for coming series to support above flows.
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The code which is dealing with SRIOV alias GUIDs in the mlx4 IB driver has some
logic which operated according to the maximal possible active functions (PF + VFs).
After the single port VFs code integration this resulted in a flow of false-positive
warnings going to the kernel log after the PF driver started the alias GUID work.
Fix it by referring to the actual number of functions.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Line 110 uses UL as a compiler cast for the 0x constant, but it's not
large enough to hold a 64-bit value on a 32-bit arch.
Signed-off-by: Doug Ledford <dledford@redhat.com>
[ Use "-1" instead of "FFFFFFFFFFFFFFFFULL". - Roland ]
Signed-off-by: Roland Dreier <roland@purestorage.com>
- mlx4 IB support for SR-IOV
- A couple of SRP initiator fixes
- Batch of nes hardware driver fixes
- Fix for long-standing use-after-free crash in IPoIB
- Other miscellaneous fixes
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
Pull infiniband updates from Roland Dreier:
"First batch of InfiniBand/RDMA changes for the 3.7 merge window:
- mlx4 IB support for SR-IOV
- A couple of SRP initiator fixes
- Batch of nes hardware driver fixes
- Fix for long-standing use-after-free crash in IPoIB
- Other miscellaneous fixes"
This merge also removes a new use of __cancel_delayed_work(), and
replaces it with the regular cancel_delayed_work() that is now irq-safe
thanks to the workqueue updates.
That said, I suspect the sequence in question should probably use
"mod_delayed_work()". I just did the minimal "don't use deprecated
functions" fixup, though.
* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (45 commits)
IB/qib: Fix local access validation for user MRs
mlx4_core: Disable SENSE_PORT for multifunction devices
mlx4_core: Clean up enabling of SENSE_PORT for older (ConnectX-1/-2) HCAs
mlx4_core: Stash PCI ID driver_data in mlx4_priv structure
IB/srp: Avoid having aborted requests hang
IB/srp: Fix use-after-free in srp_reset_req()
IB/qib: Add a qib driver version
RDMA/nes: Fix compilation error when nes_debug is enabled
RDMA/nes: Print hardware resource type
RDMA/nes: Fix for crash when TX checksum offload is off
RDMA/nes: Cosmetic changes
RDMA/nes: Fix for incorrect MSS when TSO is on
RDMA/nes: Fix incorrect resolving of the loopback MAC address
mlx4_core: Fix crash on uninitialized priv->cmd.slave_sem
mlx4_core: Trivial cleanups to driver log messages
mlx4_core: Trivial readability fix: "0X30" -> "0x30"
IB/mlx4: Create paravirt contexts for VFs when master IB driver initializes
mlx4: Modify proxy/tunnel QP mechanism so that guests do no calculations
mlx4: Paravirtualize Node Guids for slaves
mlx4: Activate SR-IOV mode for IB
...
This directory is added only for the master -- slaves do not have it.
The sysfs iov directory is used to manage and examine the port P_Key
and guid paravirtualization.
Under iov/ports, the administrator may examine the gid and P_Key tables
as they are present in the device (and as are seen in the "network
view" presented to the SM).
Under the iov/<pci slot number> directories, the admin may map the
index numbers in the physical tables (as under iov/ports) to the
paravirtualized index numbers that guests see.
For example, if the administrator, for port 1 on guest 2 maps physical
pkey index 10 to virtual index 1, then that guest, whenever it uses
its pkey index 1, will actually be using the real pkey index 10.
Based on 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>
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>
Abhilash Jindal