ethdev: deprecate attach and detach functions

These functions are buggy from the very beginning and should not be used.
Generic EAL hotplug mechanisms should be used instead.

Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Acked-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>

app/test-pmd/Makefile

@@ -13,6 +13,7 @@ APP = testpmd
 CFLAGS += -DALLOW_EXPERIMENTAL_API
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
+CFLAGS += -Wno-deprecated-declarations
 
 #
 # all source are stored in SRCS-y

app/test-pmd/meson.build

@@ -4,6 +4,7 @@
 # override default name to drop the hyphen
 name = 'testpmd'
 allow_experimental_apis = true
+cflags += '-Wno-deprecated-declarations'
 sources = files('cmdline.c',
 	'cmdline_flow.c',
 	'cmdline_mtr.c',

doc/guides/rel_notes/deprecation.rst

@@ -62,6 +62,13 @@ Deprecation Notices
   Target release for removal of the legacy API will be defined once most
   PMDs have switched to rte_flow.
 
+* ethdev: In v18.11 ``rte_eth_dev_attach()`` and ``rte_eth_dev_detach()``
+  will be removed.
+  Hotplug functions ``rte_eal_hotplug_add()`` and ``rte_eal_hotplug_remove()``
+  should be used instread.
+  Function ``rte_eth_dev_get_port_by_name()`` may be used to find
+  identifier of the added port.
+
 * pdump: As we changed to use generic IPC, some changes in APIs and structure
   are expected in subsequent release.
 

lib/librte_ethdev/rte_ethdev.h

@@ -1431,6 +1431,7 @@ uint16_t __rte_experimental rte_eth_dev_count_total(void);
  * @return
  *  0 on success and port_id is filled, negative on error
  */
+__rte_deprecated
 int rte_eth_dev_attach(const char *devargs, uint16_t *port_id);
 
 /**
@@ -1446,6 +1447,7 @@ int rte_eth_dev_attach(const char *devargs, uint16_t *port_id);
  * @return
  *  0 on success and devname is filled, negative on error
  */
+__rte_deprecated
 int rte_eth_dev_detach(uint16_t port_id, char *devname);
 
 /**