[PATCH v4 2/8] dma-mapping: add {map,unmap}_resource to dma_map_ops

From: "Niklas Söderlund" <niklas.soderlund+renesas-1zkq55x86MTxsAP9Fp7wbw@public.gmane.org>
To: vinod.koul-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
	linux-renesas-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Cc: linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	"Niklas Söderlund"
	<niklas.soderlund+renesas-1zkq55x86MTxsAP9Fp7wbw@public.gmane.org>,
	geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org,
	arnd-r2nGTMty4D4@public.gmane.org,
	linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
	laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org,
	dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org
Subject: [PATCH v4 2/8] dma-mapping: add {map,unmap}_resource to dma_map_ops
Date: Tue, 16 Feb 2016 21:39:38 +0100	[thread overview]
Message-ID: <1455655184-14478-3-git-send-email-niklas.soderlund+renesas@ragnatech.se> (raw)
In-Reply-To: <1455655184-14478-1-git-send-email-niklas.soderlund+renesas-1zkq55x86MTxsAP9Fp7wbw@public.gmane.org>

Add methods to handle mapping of device resources from a physical
address. This is needed for example to be able to map MMIO FIFO
registers to a IOMMU.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 include/linux/dma-mapping.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 75857cd..e3aba4e 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -49,6 +49,12 @@ struct dma_map_ops {
 			 struct scatterlist *sg, int nents,
 			 enum dma_data_direction dir,
 			 struct dma_attrs *attrs);
+	dma_addr_t (*map_resource)(struct device *dev, phys_addr_t phys_addr,
+			       size_t size, enum dma_data_direction dir,
+			       struct dma_attrs *attrs);
+	void (*unmap_resource)(struct device *dev, dma_addr_t dma_handle,
+			   size_t size, enum dma_data_direction dir,
+			   struct dma_attrs *attrs);
 	void (*sync_single_for_cpu)(struct device *dev,
 				    dma_addr_t dma_handle, size_t size,
 				    enum dma_data_direction dir);
-- 
2.7.1

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