From f8f92e9180b21f817a1738bdcdd9c5fd3abd5601 Mon Sep 17 00:00:00 2001
From: Conrad Meyer <cem@FreeBSD.org>
Date: Sat, 4 Jun 2016 03:54:30 +0000
Subject: [PATCH] ioat(4): Export the number of available channels

Sponsored by:	EMC / Isilon Storage Division
---
 sys/dev/ioat/ioat.c | 7 +++++++
 sys/dev/ioat/ioat.h | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/sys/dev/ioat/ioat.c b/sys/dev/ioat/ioat.c
index 3724fbe2f64..cd9e894a9dc 100644
--- a/sys/dev/ioat/ioat.c
+++ b/sys/dev/ioat/ioat.c
@@ -742,6 +742,13 @@ ioat_reset_hw_task(void *ctx, int pending __unused)
 /*
  * User API functions
  */
+unsigned
+ioat_get_nchannels(void)
+{
+
+	return (ioat_channel_index);
+}
+
 bus_dmaengine_t
 ioat_get_dmaengine(uint32_t index, int flags)
 {
diff --git a/sys/dev/ioat/ioat.h b/sys/dev/ioat/ioat.h
index 2e1012453bf..9a0c3e3bfb6 100644
--- a/sys/dev/ioat/ioat.h
+++ b/sys/dev/ioat/ioat.h
@@ -85,6 +85,8 @@ typedef void *bus_dmaengine_t;
 struct bus_dmadesc;
 typedef void (*bus_dmaengine_callback_t)(void *arg, int error);
 
+unsigned ioat_get_nchannels(void);
+
 /*
  * Called first to acquire a reference to the DMA channel
  *