r4019: Add support for userspace RDMA connection management abstraction (CMA).

- Adds common user/kernel data structures and copy routines in ib_uverbs and
  libibverbs.
- Update ib_ucm and libibcm to use common structures and copy routines.
- Add new kernel module, rdma_ucm, to support userspace CMA.
- Add userspace CMA library, librdmacm.
- Add userspace CMA test program.
- Update kernel CMA to support userspace CMA library.
	- Add support for users to transition QP states.
	- Add backlog parameter to rdma_listen API.

Signed-off-by: Sean Hefty <[email protected]>

Author: shefty

AUTHORS

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+Sean Hefty		<[email protected]>

COPYING

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+# $Id: Makefile.am 3373 2005-09-12 16:34:20Z roland $
+INCLUDES = -I$(srcdir)/include
+
+AM_CFLAGS = -g -Wall -D_GNU_SOURCE
+
+rdmacmlibdir = $(libdir)
+
+rdmacmlib_LTLIBRARIES = src/librdmacm.la
+
+src_rdmacm_la_CFLAGS = -g -Wall -D_GNU_SOURCE
+
+if HAVE_LD_VERSION_SCRIPT
+    rdmacm_version_script = -Wl,--version-script=$(srcdir)/src/librdmacm.map
+else
+    rdmacm_version_script =
+endif
+
+src_librdmacm_la_SOURCES = src/cma.c
+src_librdmacm_la_LDFLAGS = -avoid-version $(rdmacm_version_script)
+
+bin_PROGRAMS = examples/ucmatose
+examples_ucmatose_SOURCES = examples/cmatose.c
+examples_ucmatose_LDADD = $(top_builddir)/src/librdmacm.la
+
+librdmacmincludedir = $(includedir)/rdma
+
+librdmacminclude_HEADERS = include/rdma/rdma_cma_abi.h \
+			   include/rdma/rdma_cma.h
+
+EXTRA_DIST = include/rdma/rdma_cma_abi.h \
+	     include/rdma/rdma_cma.h \
+	     src/librdmacm.map \
+	     librdmacm.spec.in
+
+dist-hook: librdmacm.spec
+	cp librdmacm.spec $(distdir)

ChangeLog

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+This README is for userspace RDMA cm library.
+
+Building
+
+To make this directory, run:
+./autogen.sh && ./configure && make && make install
+
+Typically the autogen and configure steps only need be done the first
+time unless configure.in or Makefile.am changes.
+
+Libraries are installed by default at /usr/local/lib.
+
+Device files
+
+The userspace CMA uses a single device file regardless of the number
+of adapters or ports present.
+
+To create the appropriate character device file automatically with
+udev, a rule like
+
+    KERNEL="ucma", NAME="infiniband/%k", MODE="0666"
+
+can be used.  This will create the device node named
+
+    /dev/infiniband/ucma
+
+or you can create it manually
+
+  mknod /dev/infiniband/ucma c 231 255

INSTALL

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+#! /bin/sh
+
+set -x
+aclocal -I config
+libtoolize --force --copy
+autoheader
+automake --foreign --add-missing --copy
+autoconf

Makefile.am

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+dnl Process this file with autoconf to produce a configure script.
+
+AC_PREREQ(2.57)
+AC_INIT(librdmacm, 0.9.0, [email protected])
+AC_CONFIG_SRCDIR([src/cma.c])
+AC_CONFIG_AUX_DIR(config)
+AM_CONFIG_HEADER(config.h)
+AM_INIT_AUTOMAKE(librdmacm, 0.9.0)
+AC_DISABLE_STATIC
+AM_PROG_LIBTOOL
+
+AC_ARG_ENABLE(libcheck, [  --disable-libcheck      do not test for presence of ib libraries],
+[       if test x$enableval = xno ; then
+                disable_libcheck=yes
+        fi
+])
+
+dnl Checks for programs
+AC_PROG_CC
+
+dnl Checks for typedefs, structures, and compiler characteristics.
+AC_C_CONST
+AC_CHECK_SIZEOF(long)
+
+dnl Checks for libraries
+if test "$disable_libcheck" != "yes"
+then
+AC_CHECK_LIB(ibverbs, ibv_get_devices, [],
+    AC_MSG_ERROR([ibv_get_devices() not found.  librdmacm requires libibverbs.]))
+fi
+
+dnl Checks for header files.
+if test "$disable_libcheck" != "yes"
+then
+AC_CHECK_HEADER(infiniband/verbs.h, [],
+    AC_MSG_ERROR([<infiniband/verbs.h> not found.  Is libibverbs installed?]))
+fi
+AC_HEADER_STDC
+
+AC_CACHE_CHECK(whether ld accepts --version-script, ac_cv_version_script,
+    if test -n "`$LD --help < /dev/null 2>/dev/null | grep version-script`"; then
+        ac_cv_version_script=yes
+    else
+        ac_cv_version_script=no
+    fi)
+
+AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$ac_cv_version_script" = "yes")
+
+AC_CONFIG_FILES([Makefile librdmacm.spec])
+AC_OUTPUT