IB/core: Increase number of char device minors

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There is a need to increase number of possible char devices to support
large number of SR-IOV instances. The current limit is in the range of
64-128 devices/ports. Increase it to support up to 1024.

The patch performs the following steps to refactor the code:
1. Removes the split bitmap for fixed and overflow dev numbers.
2. Pre-allocates the non-legacy major number range during driver
   initialization, choosen for simplicity.
3. Add new define (RDMA_MAX_PORTS) that is shared between all drivers.
   This is the maximum total number of ports on all struct ib_devices.
4. Set RDMA_MAX_PORTS to 1024.

Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

...

This commit is contained in:

Huy Nguyen 2018-01-08 12:15:38 +02:00 • committed by Jason Gunthorpe

parent 008b656f42

commit 8cf12d7780

4 changed files with 113 additions and 156 deletions

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3

drivers/infiniband/core/core_priv.h

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73

drivers/infiniband/core/ucm.c

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103

drivers/infiniband/core/user_mad.c

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90

drivers/infiniband/core/uverbs_main.c

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