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IB/hfi1: Remove multiple device cdev

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hfi1 current exports a cdev that can be used to target all of the hfi's
in the system. However there is a problem with this approach in
that the devices could be on different subnets. This is a problem that
user space can figure out and explicitly tell the driver on which device
to create a context.

Remove the multi-purpose cdev leaving a dedicated cdev for each port.
Also remove the striping capability that is dependent upon the user
choosing the multi-purpose cdev. It is now up to user space to determine
how to stripe contexts.

Reviewed-by: Dean Luick <dean.luick@intel.com>
Reviewed-by: Mitko Haralanov <mitko.haralanov@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Dennis Dalessandro
2016-05-19 05:25:50 -07:00
committed by Doug Ledford
parent f3225c3f11
commit 0eb626590d
2 changed files with 19 additions and 98 deletions
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19
include/uapi/rdma/hfi/hfi1_user.h
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@@ -75,7 +75,7 @@
* may not be implemented; the user code must deal with this if it
* cares, or it must abort after initialization reports the difference.
*/
#define HFI1_USER_SWMINOR 0
#define HFI1_USER_SWMINOR 1
/*
* Set of HW and driver capability/feature bits.
@@ -107,19 +107,6 @@
#define HFI1_RCVHDR_ENTSIZE_16 (1UL << 1)
#define HFI1_RCVDHR_ENTSIZE_32 (1UL << 2)
/*
* If the unit is specified via open, HFI choice is fixed. If port is
* specified, it's also fixed. Otherwise we try to spread contexts
* across ports and HFIs, using different algorithms. WITHIN is
* the old default, prior to this mechanism.
*/
#define HFI1_ALG_ACROSS 0 /* round robin contexts across HFIs, then
* ports; this is the default */
#define HFI1_ALG_WITHIN 1 /* use all contexts on an HFI (round robin
* active ports within), then next HFI */
#define HFI1_ALG_COUNT 2 /* number of algorithm choices */
/* User commands. */
#define HFI1_CMD_ASSIGN_CTXT 1 /* allocate HFI and context */
#define HFI1_CMD_CTXT_INFO 2 /* find out what resources we got */
@@ -199,9 +186,7 @@ struct hfi1_user_info {
* Should be set to HFI1_USER_SWVERSION.
*/
__u32 userversion;
__u16 pad;
/* HFI selection algorithm, if unit has not selected */
__u16 hfi1_alg;
__u32 pad;
/*
* If two or more processes wish to share a context, each process
* must set the subcontext_cnt and subcontext_id to the same