kernel/include/rdma/rdma_vt.h, branch linux-5.2.y

IB/rdmavt: Fix ab/ba include issues

2019-04-24T14:31:49Z

The currently include file ordering for rdmavt headers has an ab/ba include issue the precludes using inlines from rdma_vt.h in rdmavt_qp.h. At the heart of the issue is that rdma_vt.h includes rdmavt_qp.h. Fix the ordering issue by adjusting rdma_vt.h to not require rdmavt_qp.h and move qp related inlines to rdmavt_qp.h. Additionally, promote rvt_mmap_info to rdma_vt.h since it is shared by rdmavt_cq.h and rdmavt_qp.h. Reviewed-by: Michael J. Ruhl Signed-off-by: Mike Marciniszyn Signed-off-by: Dennis Dalessandro Signed-off-by: Jason Gunthorpe

IB/{hw,sw}: Remove 'uobject->context' dependency in object creation APIs

2019-02-15T22:38:38Z

Now when we have the udata passed to all the ib_xxx object creation APIs and the additional macro 'rdma_udata_to_drv_context' to get the ib_ucontext from ib_udata stored in uverbs_attr_bundle, we can finally start to remove the dependency of the drivers in the ib_xxx->uobject->context. Signed-off-by: Shamir Rabinovitch Signed-off-by: Jason Gunthorpe

IB/hfi1: Increment the retry timeout value for TID RDMA READ request

2019-02-05T22:53:55Z

The RC retry timeout value is based on the estimated time for the response packet to come back. However, for TID RDMA READ request, due to the use of header suppression, the driver is normally not notified for each incoming response packet until the last TID RDMA READ response packet. Consequently, the retry timeout value should be extended to cover the transaction time for the entire length of a segment (default 256K) instead of that for a single packet. This patch addresses the issue by introducing new retry timer functions to account for multiple packets and wrapper functions for backward compatibility. Reviewed-by: Mike Marciniszyn Signed-off-by: Kaike Wan Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford

IB/hfi1, IB/rdmavt: Allow for extending of QP's s_ack_queue

2019-01-31T16:36:05Z

The OPFN protocol uses the COMPARE_SWAP request to exchange data between the requester and the responder and therefore needs to be stored in the QP's s_ack_queue when the request is received on the responder side. However, because the user does not know anything about the OPFN protocol, this extra entry in the queue cannot be advertised to the user. This patch adds an extra entry in a QP's s_ack_queue. Reviewed-by: Mike Marciniszyn Signed-off-by: Mitko Haralanov Signed-off-by: Kaike Wan Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford

RDMA: Rename port_callback to init_port

2019-01-14T20:05:14Z

Most provider routines are callback routines which ib core invokes. _callback suffix doesn't convey information about when such callback is invoked. Therefore, rename port_callback to init_port. Additionally, store the init_port function pointer in ib_device_ops, so that it can be accessed in subsequent patches when binding rdma device to net namespace. Signed-off-by: Parav Pandit Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe

IB/hfi1: Allow the driver to initialize QP priv struct

2018-12-07T02:59:47Z

This patch adds an interface to allow the driver to initialize the QP priv struct when the QP is created and after the qpn has been assigned. A field is added to the QP priv struct to reference the rcd and two new files are added to contain the function to initialize the rcd field so that more TID RDMA related code can be added here later. Signed-off-by: Mike Marciniszyn Signed-off-by: Kaike Wan Signed-off-by: Dennis Dalessandro Signed-off-by: Jason Gunthorpe

IB/{hfi1, qib, rdmavt}: Move send completion logic to rdmavt

2018-10-03T22:38:28Z

Moving send completion code into rdmavt in order to have shared logic between qib and hfi1 drivers. Reviewed-by: Mike Marciniszyn Reviewed-by: Brian Welty Signed-off-by: Venkata Sandeep Dhanalakota Signed-off-by: Harish Chegondi Signed-off-by: Dennis Dalessandro Signed-off-by: Jason Gunthorpe

IB/{hfi1, qib, rdmavt}: Move copy SGE logic into rdmavt

2018-10-03T22:38:28Z

This patch moves hfi1_copy_sge() into rdmavt for sharing with qib. This patch also moves all the wss_*() functions into rdmavt as several wss_*() functions are called from hfi1_copy_sge() When SGE copy mode is adaptive, cacheless copy may be done in some cases for performance reasons. In those cases, X86 cacheless copy function is called since the drivers that use rdmavt and may set SGE copy mode to adaptive are X86 only. For this reason, this patch adds "depends on X86_64" to rdmavt/Kconfig. Reviewed-by: Ashutosh Dixit Reviewed-by: Michael J. Ruhl Reviewed-by: Mike Marciniszyn Reviewed-by: Dennis Dalessandro Signed-off-by: Brian Welty Signed-off-by: Harish Chegondi Signed-off-by: Dennis Dalessandro Signed-off-by: Jason Gunthorpe

IB/hfi1: Prepare resource waits for dual leg

2018-10-01T01:21:12Z

Current implementation allows each qp to have only one send engine. As such, each qp has only one list to queue prebuilt packets when send engine resources are not available. To improve performance, it is desired to support multiple send engines for each qp. This patch creates the framework to support two send engines (two legs) for each qp for the TID RDMA protocol, which can be easily extended to support more send engines. It achieves the goal by creating a leg specific struct, iowait_work in the iowait struct, to hold the work_struct and the tx_list as well as a pointer to the parent iowait struct. The hfi1_pkt_state now has an additional field to record the current legs work structure and that is now passed to all egress waiters to determine the leg that needs to wait via a new iowait helper. The APIs are adjusted to use the new leg specific struct as required. Many new and modified helpers are added to support this change. Reviewed-by: Mitko Haralanov Signed-off-by: Mike Marciniszyn Signed-off-by: Kaike Wan Signed-off-by: Dennis Dalessandro Signed-off-by: Jason Gunthorpe

IB/rdmavt: Rename check_send_wqe as setup_wqe

2018-10-01T01:21:11Z

The driver-provided function check_send_wqe allows the hardware driver to check and set up the incoming send wqe before it is inserted into the swqe ring. This patch will rename it as setup_wqe to better reflect its usage. In addition, this function is only called when all setup is complete in rdmavt. Reviewed-by: Mike Marciniszyn Signed-off-by: Kaike Wan Signed-off-by: Dennis Dalessandro Signed-off-by: Jason Gunthorpe