net/mana: fix dependencies

The reason for not building is updated
to be consistent with other drivers.

The libibverbs was not detected through pkg-config.
The method dependency() needs to be used first.

The support in rdma-core and Linux is not released yet,
so the documentation is updated.

Fixes: 517ed6e2d5 ("net/mana: add basic driver with build environment")

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>

doc/guides/nics/mana.rst

@@ -29,7 +29,6 @@ and must be installed separately:
   It allows slow and privileged operations
   (context initialization, hardware resources allocations)
   to be managed by the kernel and fast operations to never leave user space.
-  The minimum required rdma-core version is v43.
 
   In most cases, rdma-core is shipped as a package with an OS distribution.
   User can also install the upstream version of the rdma-core from
@@ -40,7 +39,8 @@ and must be installed separately:
   Low-level user space driver library
   for Microsoft Azure Network Adapter devices,
   it is automatically loaded by libibverbs.
-  The minimum required version of rdma-core with libmana is v43.
+
+  The support of MANA is not merged in rdma-core 42.
 
 - **Kernel modules**
 
@@ -56,6 +56,8 @@ and must be installed separately:
   - mana_ib: InifiniBand device driver.
   - ib_uverbs: user space driver for verbs (entry point for libibverbs).
 
+  The support of MANA is planned in Linux 6.2.
+
 Driver compilation and testing
 ------------------------------
 

drivers/net/mana/meson.build

@@ -3,7 +3,7 @@
 
 if not is_linux or not dpdk_conf.has('RTE_ARCH_X86_64')
     build = false
-    reason = 'mana is supported on Linux X86_64'
+    reason = 'only supported on x86_64 Linux'
     subdir_done()
 endif
 
@@ -18,9 +18,12 @@ sources += files(
         'tx.c',
 )
 
-libnames = ['ibverbs', 'mana' ]
+libnames = ['ibverbs', 'mana']
 foreach libname:libnames
+    lib = dependency('lib' + libname, required:false)
+    if not lib.found()
         lib = cc.find_library(libname, required:false)
+    endif
     if lib.found()
         ext_deps += lib
     else