Adding CQ ioctl actions:
1. create_cq
2. destroy_cq
This requires adding the following:
1. A specification describing the method
a. Handler
b. Attributes specification
Each attribute is one of the following:
a. PTR_IN - input data
Note: This could be encoded inlined for
data < 64bit
b. PTR_OUT - response data
c. IDR - idr based object
d. FD - fd based object
Blobs attributes (clauses a and b) contain their type,
while objects specifications (clauses c and d)
contains the expected object type (for example, the
given id should be UVERBS_TYPE_PD) and the required
access (READ, WRITE, NEW or DESTROY). If a NEW is
required, the new object's id will be assigned to this
attribute. All attributes could get UA_FLAGS
attribute. Currently we support stating that an
attribute is mandatory or that the specification size
corresponds to a lower bound (and that this attribute
could be extended).
We currently add both default attributes and the two
generic UHW_IN and UHW_OUT driver specific attributes.
2. Handler
A handler gets a uverbs_attr_bundle. The handler developer uses
uverbs_attr_get to fetch an attribute of a given id.
Each of these attribute groups correspond to the specification
group defined in the action (clauses 1.b and 1.c respectively).
The indices of these arrays corresponds to the attribute ids
declared in the specifications (clause 2).
The handler is quite simple. It assumes the infrastructure fetched
all objects and locked, created or destroyed them as required by
the specification. Pointer (or blob) attributes were validated to
match their required sizes. After the handler finished, the
infrastructure commits or rollbacks the objects.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
In this phase, we don't want to change all the drivers to use
flexible driver's specific attributes. Therefore, we add two default
attributes: UHW_IN and UHW_OUT. These attributes are optional in some
methods and they encode the driver specific command data. We add
a function that extract this data and creates the legacy udata over
it.
Driver's data should start from UVERBS_UDATA_DRIVER_DATA_FLAG. This
turns on the first bit of the namespace, indicating this attribute
belongs to the driver's namespace.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Add a new ib_user_ioctl_verbs.h which exports all required ABI
enums and structs to the user-space.
Export the default types to user-space through this file.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
