From 9d2ffe5c62554f2795859bb661eb138759eee980 Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Mon, 25 Apr 2016 22:08:52 +0300
Subject: xtensa: enable HAVE_DMA_CONTIGUOUS

Enable HAVE_DMA_CONTIGUOUS, reserve contiguous memory at bootmem_init,
use dma_alloc_from_contiguous and dma_release_from_contiguous in
xtensa_dma_alloc/free.
This allows for big contiguous DMA buffer allocation from designated
area configured in the device tree.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
 arch/xtensa/mm/init.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'arch/xtensa/mm')

diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c
index 80e4cfb2471a..720fe4e8b497 100644
--- a/arch/xtensa/mm/init.c
+++ b/arch/xtensa/mm/init.c
@@ -26,6 +26,7 @@
 #include <linux/nodemask.h>
 #include <linux/mm.h>
 #include <linux/of_fdt.h>
+#include <linux/dma-contiguous.h>
 
 #include <asm/bootparam.h>
 #include <asm/page.h>
@@ -60,6 +61,7 @@ void __init bootmem_init(void)
 	max_low_pfn = min(max_pfn, MAX_LOW_PFN);
 
 	memblock_set_current_limit(PFN_PHYS(max_low_pfn));
+	dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
 
 	memblock_dump_all();
 }
-- 
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