blackbird-op-linux/drivers/infiniband/core/uverbs_main.c, branch master

RDMA/uverbs: Add ioctl command to get a device context

2020-01-16T19:55:45+00:00

Allow future extensions of the get context command through the uverbs ioctl kabi. Unlike the uverbs version this does not return an async_fd as well, that has to be done with another command. Link: https://lore.kernel.org/r/1578506740-22188-5-git-send-email-yishaih@mellanox.com Signed-off-by: Yishai Hadas Signed-off-by: Jason Gunthorpe

RDMA/core: Add UVERBS_METHOD_ASYNC_EVENT_ALLOC

2020-01-16T19:55:45+00:00

Allow the async FD to be allocated separately from the context. This is necessary to introduce the ioctl to create a context, as an ioctl should only ever create a single uobject at a time. If multiple async FDs are created then the first one is used to deliver affiliated events from any ib_uevent_object, with all subsequent ones will receive only unaffiliated events. Link: https://lore.kernel.org/r/1578506740-22188-3-git-send-email-yishaih@mellanox.com Signed-off-by: Yishai Hadas Signed-off-by: Jason Gunthorpe

RDMA/core: Use READ_ONCE for ib_ufile.async_file

2020-01-13T20:20:16+00:00

The writer for async_file holds the ucontext_lock, while the readers are left unlocked. Most readers rely on an implicit locking, either by having a uobject (which cannot be created before a context) or by holding the ib_ufile kref. However ib_uverbs_free_hw_resources() has no implicit lock and has a possible race. Make this all clear and sane by using READ_ONCE consistently. Link: https://lore.kernel.org/r/1578504126-9400-15-git-send-email-yishaih@mellanox.com Signed-off-by: Yishai Hadas Signed-off-by: Jason Gunthorpe

RDMA/core: Make ib_uverbs_async_event_file into a uobject

2020-01-13T20:20:16+00:00

This makes async events aligned with completion events as both are full uobjects of FD type and use the same uobject lifecycle. A bunch of duplicate code is consolidated and the general flow between the two FDs is now very similar. Link: https://lore.kernel.org/r/1578504126-9400-14-git-send-email-yishaih@mellanox.com Signed-off-by: Yishai Hadas Signed-off-by: Jason Gunthorpe

RDMA/core: Simplify type usage for ib_uverbs_async_handler()

2020-01-13T20:20:16+00:00

This function works on an ib_uverbs_async_file. Accept that as a parameter instead of the struct ib_uverbs_file. Consoldiate all the callers working from an ib_uevent_object to a single function and locate the async_file directly from the struct ib_uobject instead of using context_ptr. Link: https://lore.kernel.org/r/1578504126-9400-11-git-send-email-yishaih@mellanox.com Signed-off-by: Yishai Hadas Signed-off-by: Jason Gunthorpe

RDMA/core: Do not erase the type of ib_wq.uobject

2020-01-13T20:20:16+00:00

This is a struct ib_uwq_object pointer, instead of using container_of() all over the place just store it with its actual type. Link: https://lore.kernel.org/r/1578504126-9400-10-git-send-email-yishaih@mellanox.com Signed-off-by: Yishai Hadas Signed-off-by: Jason Gunthorpe

RDMA/core: Do not erase the type of ib_srq.uobject

2020-01-13T20:20:15+00:00

This is a struct ib_usrq_object pointer, instead of using container_of() all over the place just store it with its actual type. Link: https://lore.kernel.org/r/1578504126-9400-9-git-send-email-yishaih@mellanox.com Signed-off-by: Yishai Hadas Signed-off-by: Jason Gunthorpe

RDMA/core: Do not erase the type of ib_qp.uobject

2020-01-13T20:20:15+00:00

This is a struct ib_uqp_object pointer, instead of using container_of() all over the place just store it with its actual type. Link: https://lore.kernel.org/r/1578504126-9400-8-git-send-email-yishaih@mellanox.com Signed-off-by: Yishai Hadas Signed-off-by: Jason Gunthorpe

RDMA/core: Do not erase the type of ib_cq.uobject

2020-01-13T20:20:15+00:00

This is a struct ib_ucq_object pointer, instead of using container_of() all over the place just store it with its actual type. Link: https://lore.kernel.org/r/1578504126-9400-7-git-send-email-yishaih@mellanox.com Signed-off-by: Yishai Hadas Signed-off-by: Jason Gunthorpe

RDMA/core: Make ib_ucq_object use ib_uevent_object

2020-01-13T20:20:15+00:00

Any uobject that sends events into the async_event_file should be using ib_uevent_object so it can use the standard uevent based helper functions. CQ pushes events into both the async_event and the comp_channel in an open coded way. Move the async events related stuff to ib_uevent_object. Link: https://lore.kernel.org/r/1578504126-9400-6-git-send-email-yishaih@mellanox.com Signed-off-by: Yishai Hadas Signed-off-by: Jason Gunthorpe