netmap: refactor logging macros and pipes

Changelist:
    - Replace ND, D and RD macros with nm_prdis, nm_prinf, nm_prerr
      and nm_prlim, to avoid possible naming conflicts.
    - Add netmap_krings_mode_commit() helper function and use that
      to reduce code duplication.
    - Refactor pipes control code to export some functions that
      can be reused by the veth driver (on Linux) and epair(4).
    - Add check to reject API requests with version less than 11.
    - Small code refactoring for the null adapter.

MFC after:	1 week

1 files changed, 2 insertions, 25 deletions

diff --git a/sys/dev/netmap/netmap_generic.c b/sys/dev/netmap/netmap_generic.c
index dd90734b9458..e5a2499a595d 100644
--- a/sys/dev/netmap/netmap_generic.c
+++ b/sys/dev/netmap/netmap_generic.c
@@ -237,18 +237,7 @@ generic_netmap_unregister(struct netmap_adapter *na)
 		nm_os_catch_tx(gna, 0);
 	}
 
-	for_each_rx_kring_h(r, kring, na) {
-		if (nm_kring_pending_off(kring)) {
-			nm_prinf("Emulated adapter: ring '%s' deactivated", kring->name);
-			kring->nr_mode = NKR_NETMAP_OFF;
-		}
-	}
-	for_each_tx_kring_h(r, kring, na) {
-		if (nm_kring_pending_off(kring)) {
-			kring->nr_mode = NKR_NETMAP_OFF;
-			nm_prinf("Emulated adapter: ring '%s' deactivated", kring->name);
-		}
-	}
+	netmap_krings_mode_commit(na, /*onoff=*/0);
 
 	for_each_rx_kring(r, kring, na) {
 		/* Free the mbufs still pending in the RX queues,
@@ -371,19 +360,7 @@ generic_netmap_register(struct netmap_adapter *na, int enable)
 		}
 	}
 
-	for_each_rx_kring_h(r, kring, na) {
-		if (nm_kring_pending_on(kring)) {
-			nm_prinf("Emulated adapter: ring '%s' activated", kring->name);
-			kring->nr_mode = NKR_NETMAP_ON;
-		}
-
-	}
-	for_each_tx_kring_h(r, kring, na) {
-		if (nm_kring_pending_on(kring)) {
-			nm_prinf("Emulated adapter: ring '%s' activated", kring->name);
-			kring->nr_mode = NKR_NETMAP_ON;
-		}
-	}
+	netmap_krings_mode_commit(na, /*onoff=*/1);
 
 	for_each_tx_kring(r, kring, na) {
 		/* Initialize tx_pool and tx_event. */