linux.git/include/rdma, branch v5.2-rc2

RDMA: Add EFA related definitions

2019-05-06T16:47:50+00:00

Add EFA driver ID to the IOCTL interface uapi. This patch also adds
unspecified node/transport type that will be used by EFA (usnic is left
unchanged as it's already part of our ABI).

Signed-off-by: Gal Pressman 
Reviewed-by: Shiraz Saleem 
Reviewed-by: Steve Wise 
Reviewed-by: Leon Romanovsky 
Signed-off-by: Jason Gunthorpe

RDMA/umem: Remove hugetlb flag

2019-05-06T16:08:11+00:00

The drivers i40iw and bnxt_re no longer dependent on the hugetlb flag. So
remove this flag from ib_umem structure.

Reviewed-by: Michael J. Ruhl 
Signed-off-by: Shiraz Saleem 
Signed-off-by: Jason Gunthorpe

RDMA/verbs: Add a DMA iterator to return aligned contiguous memory blocks

2019-05-06T16:08:11+00:00

This helper iterates over a DMA-mapped SGL and returns contiguous memory
blocks aligned to a HW supported page size.

Suggested-by: Jason Gunthorpe 
Signed-off-by: Shiraz Saleem 
Signed-off-by: Jason Gunthorpe

RDMA/umem: Add API to find best driver supported page size in an MR

2019-05-06T16:08:11+00:00

This helper iterates through the SG list to find the best page size to use
from a bitmap of HW supported page sizes. Drivers that support multiple
page sizes, but not mixed sizes in an MR can use this API.

Suggested-by: Jason Gunthorpe 
Signed-off-by: Shiraz Saleem 
Signed-off-by: Jason Gunthorpe

RDMA/core: Allow detaching gid attribute netdevice for RoCE

2019-05-03T14:10:03+00:00

When there is active traffic through a GID, a QP/AH holds reference to
this GID entry. RoCE GID entry holds reference to its attached
netdevice. Due to this when netdevice is deleted by admin user, its
refcount is not dropped.

Therefore, while deleting RoCE GID, wait for all GID attribute's netdev
users to finish accessing netdev in rcu context.  Once all users done
accessing it, release the netdev refcount.

Signed-off-by: Huy Nguyen 
Signed-off-by: Parav Pandit 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Jason Gunthorpe

RDMA/cma: Use rdma_read_gid_attr_ndev_rcu to access netdev

2019-05-03T14:10:03+00:00

To access the netdevice of the GID attribute, use an existing API
rdma_read_gid_attr_ndev_rcu().

This further reduces dependency on open access to netdevice of GID
attribute.

Signed-off-by: Parav Pandit 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Jason Gunthorpe

RDMA: Introduce and use GID attr helper to read RoCE L2 fields

2019-05-03T14:10:02+00:00

Instead of RoCE drivers figuring out vlan, smac fields while working on
QP/AH, provide a helper routine to read the L2 fields such as vlan_id and
source mac address.

This moves logic from mlx5 driver to core for wider usage for RoCE ports.

This is a preparation patch to allow detaching netdev in subsequent patch.

Signed-off-by: Parav Pandit 
Signed-off-by: Leon Romanovsky 
Signed-off-by: Jason Gunthorpe

RDMA: Get rid of iw_cm_verbs

2019-05-03T13:56:56+00:00

Integrate iw_cm_verbs data members into ib_device_ops and ib_device
structs, this is done to achieve the following:

1) Avoid memory related bugs durring error unwind
2) Make the code more cleaner
3) Reduce code duplication

Signed-off-by: Kamal Heib 
Signed-off-by: Jason Gunthorpe

RDMA/core: Introduce RDMA subsystem ibdev_* print functions

2019-05-01T16:29:28+00:00

Similarly to dev/netdev/etc printk helpers, add standard printk helpers
for the RDMA subsystem.

Example output:
efa 0000:00:06.0 efa_0: Hello World!
efa_0: Hello World! (no parent device set)
(NULL ib_device): Hello World! (ibdev is NULL)

Cc: Jason Baron 
Suggested-by: Jason Gunthorpe 
Suggested-by: Leon Romanovsky 
Signed-off-by: Gal Pressman 
Reviewed-by: Leon Romanovsky 
Reviewed-by: Shiraz Saleem 
Reviewed-by: Dennis Dalessandro 
Signed-off-by: Doug Ledford

Merge branch 'rdma_mmap' into rdma.git for-next

2019-04-24T19:20:34+00:00

Jason Gunthorpe says:

====================
Upon review it turns out there are some long standing problems in BAR
mapping area:
 * BAR pages intended for read-only can be switched to writable via mprotect.
 * Missing use of rdma_user_mmap_io for the mlx5 clock BAR page.
 * Disassociate causes SIGBUS when touching the pages.
 * CPU pages are being mapped through to the process via remap_pfn_range
   instead of the more appropriate vm_insert_page, causing weird behaviors
   during disassociation.

This series adds the missing VM_* flag manipulation, adds faulting a zero
page for disassociation and revises the CPU page mappings to use
vm_insert_page.
====================

For dependencies this branch is based on for-rc from
git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git

* branch 'rdma_mmap':
  RDMA: Remove rdma_user_mmap_page
  RDMA/mlx5: Use get_zeroed_page() for clock_info
  RDMA/ucontext: Fix regression with disassociate
  RDMA/mlx5: Use rdma_user_map_io for mapping BAR pages
  RDMA/mlx5: Do not allow the user to write to the clock page

Signed-off-by: Jason Gunthorpe