linux/drivers/infiniband/hw
Gary Leshner 7f90a5a069 IB/{rdmavt, hfi1}: Implement creation of accelerated UD QPs
Adds capability to create a qpn to be recognized as an accelerated
UD QP for ipoib.

This is accomplished by reserving 0x81 in byte[0] of the qpn as the
prefix for these qp types and reserving qpns between 0x810000 and
0x81ffff.

The hfi1 capability mask already contained a flag for the VNIC netdev.
This has been renamed and extended to include both VNIC and ipoib.

The rvt code to allocate qps now recognizes this flag and sets 0x81
into byte[0] of the qpn.

The code to allocate qpns is modified to reset the qpn numbering when it
is detected that a value is located in byte[0] for a UD QP and it is a
qpn being requested for net dev use. If it is a regular UD QP then it is
allowable to have bits set in byte[0] of the qpn and provide the
previously normal behavior.

The code to free the qpn now checks for the AIP prefix value of 0x81 and
removes it from the qpn before being freed so that the lower 16 bit
number can be reused.

This patch requires minor changes in the IB core and ipoib to facilitate
the creation of accelerated UP QPs.

Link: https://lore.kernel.org/r/20200511160607.173205.11757.stgit@awfm-01.aw.intel.com
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Gary Leshner <Gary.S.Leshner@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2020-05-21 11:23:54 -03:00
..
bnxt_re RDMA: Group create AH arguments in struct 2020-05-02 20:19:53 -03:00
cxgb4 Linux 5.6-rc4 2020-03-04 13:11:06 -04:00
efa RDMA/efa: Report host information to the device 2020-05-21 10:05:00 -03:00
hfi1 IB/{rdmavt, hfi1}: Implement creation of accelerated UD QPs 2020-05-21 11:23:54 -03:00
hns RDMA/hns: Reserve one sge in order to avoid local length error 2020-05-19 20:54:59 -03:00
i40iw i40iw: Report correct firmware version 2020-03-18 13:53:44 -03:00
mlx4 RDMA: Group create AH arguments in struct 2020-05-02 20:19:53 -03:00
mlx5 RDMA/mlx5: Add init2init as a modify command 2020-05-19 21:02:12 -03:00
mthca RDMA: Group create AH arguments in struct 2020-05-02 20:19:53 -03:00
ocrdma RDMA: Group create AH arguments in struct 2020-05-02 20:19:53 -03:00
qedr RDMA: Group create AH arguments in struct 2020-05-02 20:19:53 -03:00
qib IB/qib: Remove unused variable ret 2020-04-14 16:34:17 -03:00
usnic RDMA/providers: Fix return value when QP type isn't supported 2020-03-04 12:13:42 -04:00
vmw_pvrdma RDMA: Group create AH arguments in struct 2020-05-02 20:19:53 -03:00
Makefile RDMA/iw_cxgb3: Remove the iw_cxgb3 module from kernel 2019-10-04 15:08:59 -03:00