BMC/Intel-BMC/linux.git/include/rdma/rdma_vt.h, branch dev-4.6

IB/rdmavt: Remove unnecessary exported functions

2016-03-11T01:38:10+00:00

Remove exported functions which are no longer required as the functionality has moved into rdmavt. This also requires re-ordering some of the functions since their prototype no longer appears in a header file. Rather than add forward declarations it is just cleaner to re-order some of the functions. Reviewed-by: Jubin John Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford

IB/rdmavt: Remove signal_supported and comments

2016-03-11T01:38:10+00:00

Initially it was intended that rdmavt would support some signaling between the underlying driver and itself. However this turned out to be unnecessary for qib and hfi1. If we need to add something like this in later to support another driver we should do it then. As of now this essentially dead code so remove it. Reviewed-by: Ira Weiny Reviewed-by: Jubin John Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford

IB/rdmavt: Remove RVT_FLAGs

2016-03-11T01:38:10+00:00

While hfi1 and qib were still supporting bits and pieces of core verbs components there needed to be a way to convey if rdmavt should handle allocation and initialize of resources like the queue pair table. Now that all of this is moved into rdmavt there is no need for these flags. They are no longer used in the drivers. Reviewed-by: Ira Weiny Reviewed-by: Jubin John Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford

IB/qib,rdmavt: Move smi_ah to qib

2016-03-11T01:38:09+00:00

Rdmavt adopted an smi_ah from qib which is not needed by hfi1. Move this back to qib and get it out of the common library. Reviewed-by: Ira Weiny Reviewed-by: Jubin John Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford

IB/rdmavt: Add per verb driver callback checking

2016-03-11T01:38:09+00:00

For each verb validate that all requirements for driver callbacks are met. If a function is called without checking for a valid pointer, it is a required function. Also document what each callback function does. Reviewed-by: Mike Marciniszyn Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford

IB/rdmavt: Clean up comments and add more documentation

2016-03-11T01:38:08+00:00

Add, remove, and otherwise clean up existing comments that are leftover from the initial code postings of rdmavt. Many of the comments were added to provide an idea on the direction we were thinking of going. Now that the design is solidified make a pass over and clean everything up. Also add details where lacking. Ensure all non static functions have nano comments. Reviewed-by: Jubin John Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford

IB/qib, staging/rdma/hfi1: add s_hlock for use in post send

2016-03-11T01:38:07+00:00

This patch adds an additional lock to reduce contention on the s_lock. This lock is used in post_send() so that the post_send is not serialized with the send engine and other send related processing. To do this the s_next_psn is now maintained on post_send() while post_send() related fields are moved to a new cache line. There is an s_avail maintained for the post_send() to mitigate trading cache lines with the send engine. The lock is released/acquired around releasing the just built packet to the egress mechanism. Reviewed-by: Jubin John Reviewed-by: Dennis Dalessandro Signed-off-by: Dean Luick Signed-off-by: Harish Chegondi Signed-off-by: Mike Marciniszyn Signed-off-by: Ira Weiny Signed-off-by: Doug Ledford

IB/rdmavt, staging/rdma/hfi1: use qps to dynamically scale timeout value

2016-03-11T01:38:07+00:00

A busy_jiffies variable is maintained and updated when rc qps are created and deleted. busy_jiffies is a scaled value of the number of rc qps in the device. busy_jiffies is incremented every rc qp scaling interval. busy_jiffies is added to the rc timeout in add_retry_timer and mod_retry_timer. The rc qp scaling interval is selected based on extensive performance evaluation of targeted workloads. Reviewed-by: Dennis Dalessandro Reviewed-by: Mike Marciniszyn Signed-off-by: Vennila Megavannan Signed-off-by: Jubin John Signed-off-by: Doug Ledford

IB/rdmavt: Add support for query_port, modify_port and get_port_immutable

2016-03-11T01:37:32+00:00

rvt_query_port calls into the driver through a call back function query_port_state to populate the rest of ib_port_attr elements. rvt_modify_port calls into the driver if needed through a call back function shut_down_port() Signed-off-by: Harish Chegondi Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford

IB/rdmavt: Add query gid support.

2016-03-11T01:37:32+00:00

Addin query gid support. Rdmavt still relies on the driver to maintain the gid table. Rdmavt simply calls into the driver to retrive the guid for a particular port. Reviewed-by: Harish Chegondi Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford