linux-stable.git/include/uapi/rdma, branch linux-4.18.y

IB/rxe: Revise the ib_wr_opcode enum

2018-11-13T19:12:39+00:00

commit 9a59739bd01f77db6fbe2955a4fce165f0f43568 upstream.

This enum has become part of the uABI, as both RXE and the
ib_uverbs_post_send() command expect userspace to supply values from this
enum. So it should be properly placed in include/uapi/rdma.

In userspace this enum is called 'enum ibv_wr_opcode' as part of
libibverbs.h. That enum defines different values for IB_WR_LOCAL_INV,
IB_WR_SEND_WITH_INV, and IB_WR_LSO. These were introduced (incorrectly, it
turns out) into libiberbs in 2015.

The kernel has changed its mind on the numbering for several of the IB_WC
values over the years, but has remained stable on IB_WR_LOCAL_INV and
below.

Based on this we can conclude that there is no real user space user of the
values beyond IB_WR_ATOMIC_FETCH_AND_ADD, as they have never worked via
rdma-core. This is confirmed by inspection, only rxe uses the kernel enum
and implements the latter operations. rxe has clearly never worked with
these attributes from userspace. Other drivers that support these opcodes
implement the functionality without calling out to the kernel.

To make IB_WR_SEND_WITH_INV and related work for RXE in userspace we
choose to renumber the IB_WR enum in the kernel to match the uABI that
userspace has bee using since before Soft RoCE was merged. This is an
overall simpler configuration for the whole software stack, and obviously
can't break anything existing.

Reported-by: Seth Howell 
Tested-by: Seth Howell 
Fixes: 8700e3e7c485 ("Soft RoCE driver")
Cc: 
Signed-off-by: Jason Gunthorpe 
Signed-off-by: Greg Kroah-Hartman

Merge tag 'verbs_flow_counters' of git://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git into for-next

2018-06-04T14:48:11+00:00

Pull verbs counters series from Leon Romanovsky:

====================
Verbs flow counters support

This series comes to allow user space applications to monitor real time
traffic activity and events of the verbs objects it manages, e.g.: ibv_qp,
ibv_wq, ibv_flow.

The API enables generic counters creation and define mapping to
association with a verbs object, the current mlx5 driver is using this API
for flow counters.

With this API, an application can monitor the entire life cycle of object
activity, defined here as a static counters attachment.  This API also
allows dynamic counters monitoring of measurement points for a partial
period in the verbs object life cycle.

In addition it presents the implementation of the generic counters
interface.

This will be achieved by extending flow creation by adding a new flow
count specification type which allows the user to associate a previously
created flow counters using the generic verbs counters interface to the
created flow, once associated the user could read statistics by using the
read function of the generic counters interface.

The API includes:
1. create and destroyed API of a new counters objects
2. read the counters values from HW

Note:
Attaching API to allow application to define the measurement points per
objects is a user space only API and this data is passed to kernel when
the counted object (e.g. flow) is created with the counters object.
===================

* tag 'verbs_flow_counters':
  IB/mlx5: Add counters read support
  IB/mlx5: Add flow counters read support
  IB/mlx5: Add flow counters binding support
  IB/mlx5: Add counters create and destroy support
  IB/uverbs: Add support for flow counters
  IB/core: Add support for flow counters
  IB/core: Support passing uhw for create_flow
  IB/uverbs: Add read counters support
  IB/core: Introduce counters read verb
  IB/uverbs: Add create/destroy counters support
  IB/core: Introduce counters object and its create/destroy
  IB/uverbs: Add an ib_uobject getter to ioctl() infrastructure
  net/mlx5: Export flow counter related API
  net/mlx5: Use flow counter pointer as input to the query function

IB/mlx5: Add flow counters binding support

2018-06-02T04:35:32+00:00

Associates a counters with a flow when IB_FLOW_SPEC_ACTION_COUNT is part
of the flow specifications.

The counters user space placements of location and description (index,
description) pairs are passed as private data of the counters flow
specification.

Reviewed-by: Yishai Hadas 
Signed-off-by: Raed Salem 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Jason Gunthorpe

IB/uverbs: Add support for flow counters

2018-06-02T04:33:56+00:00

The struct ib_uverbs_flow_spec_action_count associates a counters object
with the flow.

Post this association the flow counters can be read via the counters
object.

Reviewed-by: Yishai Hadas 
Signed-off-by: Raed Salem 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Jason Gunthorpe

IB/uverbs: Add read counters support

2018-06-02T04:33:55+00:00

This patch exposes the read counters verb to user space applications.  By
that verb the user can read the hardware counters which are associated
with the counters object.

The application needs to provide a sufficient memory to hold the
statistics.

Reviewed-by: Yishai Hadas 
Signed-off-by: Raed Salem 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Jason Gunthorpe

IB/uverbs: Add create/destroy counters support

2018-06-02T04:33:54+00:00

User space application which uses counters functionality, is expected to
allocate/release the counters resources by calling create/destroy verbs
and in turn get a unique handle that can be used to attach the counters to
its counted type.

Reviewed-by: Yishai Hadas 
Signed-off-by: Raed Salem 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Jason Gunthorpe

Merge branch 'mini_cqe' into git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma for-next

2018-05-29T21:23:18+00:00

Leon Romanovsky says:

====================
Introduce new internal to mlx5 CQE format - mini-CQE. It is a CQE in
compressed form that holds data needed to extra a single full CQE.

It is a stride index, byte count and packet checksum.
====================

* mini_cqe:
  IB/mlx5: Introduce a new mini-CQE format
  IB/mlx5: Refactor CQE compression response
  net/mlx5: Exposing a new mini-CQE format

Signed-off-by: Jason Gunthorpe

IB/mlx5: Introduce a new mini-CQE format

2018-05-29T21:18:38+00:00

The new mini-CQE format includes the stride index, byte count and
packet checksum.
Stride index is needed for striding WQ feature.
This patch exposes this capability and enables its setting
via mlx5 UHW data as part of query device and cq creation.

Reviewed-by: Yishai Hadas 
Reviewed-by: Guy Levi 
Signed-off-by: Yonatan Cohen 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Jason Gunthorpe

IB/mlx5: Expose MPLS related tunneling offloads

2018-05-17T03:32:55+00:00

This patch reports the device's capbilities to offload
encapsulated MPLS tunnel protocols to user-space:
- Capability to offload MPLS over GRE.
- Capability to offload MPLS over UDP.

Reviewed-by: Mark Bloch 
Signed-off-by: Ariel Levkovich 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Jason Gunthorpe

IB/uverbs: Expose MPLS flow spec to the user-kernel ABI header

2018-05-17T03:32:54+00:00

Add ib_uverbs_flow_spec_mpls to define a rule to match the MPLS
protocol.

The spec includes the generic specs header, type, size and reserved
fields while the filter itself is defined as ib_uverbs_flow_mpls_filter
and includes a single 32bit field named 'label' which consists of:
Bits 0:19  - The MPLS label.
Bits 20:22 - Traffic class field.
Bit  23    - Bottom of stack bit.
Bits 24:31 - Time to live (TTL) field.

Reviewed-by: Mark Bloch 
Signed-off-by: Ariel Levkovich 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Jason Gunthorpe