linux/drivers/infiniband/core
Shani Michaeli 7083e42ee2 IB/core: Add "type 2" memory windows support
This patch enhances the IB core support for Memory Windows (MWs).

MWs allow an application to have better/flexible control over remote
access to memory.

Two types of MWs are supported, with the second type having two flavors:

    Type 1  - associated with PD only
    Type 2A - associated with QPN only
    Type 2B - associated with PD and QPN

Applications can allocate a MW once, and then repeatedly bind the MW
to different ranges in MRs that are associated to the same PD. Type 1
windows are bound through a verb, while type 2 windows are bound by
posting a work request.

The 32-bit memory key is composed of a 24-bit index and an 8-bit
key. The key is changed with each bind, thus allowing more control
over the peer's use of the memory key.

The changes introduced are the following:

* add memory window type enum and a corresponding parameter to ib_alloc_mw.
* type 2 memory window bind work request support.
* create a struct that contains the common part of the bind verb struct
  ibv_mw_bind and the bind work request into a single struct.
* add the ib_inc_rkey helper function to advance the tag part of an rkey.

Consumer interface details:

* new device capability flags IB_DEVICE_MEM_WINDOW_TYPE_2A and
  IB_DEVICE_MEM_WINDOW_TYPE_2B are added to indicate device support
  for these features.

  Devices can set either IB_DEVICE_MEM_WINDOW_TYPE_2A or
  IB_DEVICE_MEM_WINDOW_TYPE_2B if it supports type 2A or type 2B
  memory windows. It can set neither to indicate it doesn't support
  type 2 windows at all.

* modify existing provides and consumers code to the new param of
  ib_alloc_mw and the ib_mw_bind_info structure

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Shani Michaeli <shanim@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-02-21 11:51:45 -08:00
..
addr.c workqueue: use mod_delayed_work() instead of cancel + queue 2012-08-13 16:27:37 -07:00
agent.c IB/mad: Improve an error message so error code is included 2011-03-18 09:42:20 -07:00
agent.h RDMA: Remove subversion $Id tags 2008-07-14 23:48:44 -07:00
cache.c IB/core: Add ib_find_exact_cached_pkey() 2012-09-30 20:33:30 -07:00
cm_msgs.h IB/core: Move CM_xxx_ATTR_ID macros from cm_msgs.h to ib_cm.h 2012-07-08 18:05:06 -07:00
cm.c idr: rename MAX_LEVEL to MAX_IDR_LEVEL 2012-10-06 03:04:56 +09:00
cma.c RDMA/cm: Change return value from find_gid_port() 2012-11-29 12:16:29 -08:00
core_priv.h IB/core: Allow device-specific per-port sysfs files 2010-05-21 10:34:44 -07:00
device.c IB/core: Handle table with full and partial membership for the same P_Key 2012-09-30 20:33:29 -07:00
fmr_pool.c infiniband: add in export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:35 -04:00
iwcm.c RDMA/iwcm: Reject connect requests if cmid is not in LISTEN state 2012-03-07 15:14:53 -08:00
iwcm.h
mad_priv.h IB/mad: Allow tuning of QP0 and QP1 sizes 2009-09-07 08:28:48 -07:00
mad_rmpp.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mad_rmpp.h RDMA: Remove subversion $Id tags 2008-07-14 23:48:44 -07:00
mad.c workqueue: deprecate __cancel_delayed_work() 2012-08-21 13:18:24 -07:00
Makefile RDMA: Add netlink infrastructure 2011-05-20 11:46:11 -07:00
multicast.c infiniband: add in export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:35 -04:00
netlink.c infiniband: pass rdma_cm module to netlink_dump_start 2012-10-07 00:30:56 -04:00
packer.c infiniband: add in export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:35 -04:00
sa_query.c IB/sa: Add GuidInfoRecord query support 2012-07-08 18:05:06 -07:00
sa.h
smi.c IB/mad: Check hop count field in directed route MAD to avoid array overflow 2009-09-05 20:24:10 -07:00
smi.h IB/mad: Enable loopback of DR SMP responses from userspace 2008-01-25 14:15:25 -08:00
sysfs.c IB/core: Don't return EINVAL from sysfs rate attribute for invalid speeds 2012-04-02 10:57:31 -07:00
ucm.c IB/core: Remove unused variables in ucm/ucma 2012-09-30 20:31:46 -07:00
ucma.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
ud_header.c infiniband: add in export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:35 -04:00
umem.c IB/core: Fix mismatch between locked and pinned pages 2012-05-11 11:38:22 -07:00
user_mad.c switch device_get_devnode() and ->devnode() to umode_t * 2012-01-03 22:54:55 -05:00
uverbs_cmd.c switch simple cases of fget_light to fdget 2012-09-26 22:20:08 -04:00
uverbs_main.c switch simple cases of fget_light to fdget 2012-09-26 22:20:08 -04:00
uverbs_marshall.c infiniband: add in export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:35 -04:00
uverbs.h RDMA/uverbs: Export ib_open_qp() capability to user space 2011-10-13 09:50:56 -07:00
verbs.c IB/core: Add "type 2" memory windows support 2013-02-21 11:51:45 -08:00