mlx5: Allow opening a device with specified UCAPs #1571
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To commit: 4f12f6ab8580 ("docs: infiniband: document the UCAP API").
Signed-off-by: Yishai Hadas <[email protected]>
Add file descriptor array attribute when creating a user context. This change allows passing a file descriptor array when creating a user context, to enable device capabilities represented by this array. Change providers' code to support the new attribute. Signed-off-by: Chiara Meiohas <[email protected]> Signed-off-by: Yishai Hadas <[email protected]>
Add support for file descriptor array attribute in mlx5dv_open_device(). This allows passing file descriptors of UCAP character devices to create a ucontext with the associated capabilities. Signed-off-by: Chiara Meiohas <[email protected]> Signed-off-by: Yishai Hadas <[email protected]>
Add file descriptor array attributes when opening a device using mlx5dv_open_device(). Signed-off-by: Linoy Ganti <[email protected]> Signed-off-by: Edward Srouji <[email protected]>
Add a test where the client creates a context with an fd array, the server uses a regular context, and traffic is run. Signed-off-by: Linoy Ganti <[email protected]> Signed-off-by: Edward Srouji <[email protected]>
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This series allows opening a device with specified UCAPs.
This functionality provides fine-grained control over specific firmware features by representing each capability as a character device with root read-write access.
Root processes can grant users special privileges by allowing access to these character devices. User contexts created using a file descriptor of a UCAP will have specific UCAP privileges.
The series includes a man page update for mlx5dv_open_device() to describe the expected usage and a pyverbs test to demonstrate the usage.
The matching kernel part was sent already to rdma-next.