Merge tag 'dmaengine-4.2-rc1' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine updates from Vinod Koul:
 "This time we have support for few new devices, few new features and
  odd fixes spread thru the subsystem.

  New devices added:
   - support for CSRatlas7 dma controller
   - Allwinner H3(sun8i) controller
   - TI DMA crossbar driver on DRA7x
   - new pxa driver

  New features added:
   - memset support is bought back now that we have a user in xdmac controller
   - interleaved transfers support different source and destination strides
   - supporting DMA routers and configuration thru DT
   - support for reusing descriptors
   - xdmac memset and interleaved transfer support
   - hdmac support for interleaved transfers
   - omap-dma support for memcpy

  Others:
   - Constify platform_device_id
   - mv_xor fixes and improvements"

* tag 'dmaengine-4.2-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (46 commits)
  dmaengine: xgene: fix file permission
  dmaengine: fsl-edma: clear pending interrupts on initialization
  dmaengine: xdmac: Add memset support
  Documentation: dmaengine: document DMA_CTRL_ACK
  dmaengine: virt-dma: don't always free descriptor upon completion
  dmaengine: Revert "drivers/dma: remove unused support for MEMSET operations"
  dmaengine: hdmac: Implement interleaved transfers
  dmaengine: Move icg helpers to global header
  dmaengine: mv_xor: improve descriptors list handling and reduce locking
  dmaengine: mv_xor: Enlarge descriptor pool size
  dmaengine: mv_xor: add support for a38x command in descriptor mode
  dmaengine: mv_xor: Rename function for consistent naming
  dmaengine: mv_xor: bug fix for racing condition in descriptors cleanup
  dmaengine: pl330: fix wording in mcbufsz message
  dmaengine: sirf: add CSRatlas7 SoC support
  dmaengine: xgene-dma: Fix "incorrect type in assignement" warnings
  dmaengine: fix kernel-doc documentation
  dmaengine: pxa_dma: add support for legacy transition
  dmaengine: pxa_dma: add debug information
  dmaengine: pxa: add pxa dmaengine driver
  ...

4 files changed, 124 insertions, 34 deletions

diff --git a/include/linux/dma/pxa-dma.h b/include/linux/dma/pxa-dma.h
new file mode 100644
index 000000000000..3edc99294bf6
--- /dev/null
+++ b/include/linux/dma/pxa-dma.h
@@ -0,0 +1,27 @@
+#ifndef _PXA_DMA_H_
+#define _PXA_DMA_H_
+
+enum pxad_chan_prio {
+	PXAD_PRIO_HIGHEST = 0,
+	PXAD_PRIO_NORMAL,
+	PXAD_PRIO_LOW,
+	PXAD_PRIO_LOWEST,
+};
+
+struct pxad_param {
+	unsigned int drcmr;
+	enum pxad_chan_prio prio;
+};
+
+struct dma_chan;
+
+#ifdef CONFIG_PXA_DMA
+bool pxad_filter_fn(struct dma_chan *chan, void *param);
+#else
+static inline bool pxad_filter_fn(struct dma_chan *chan, void *param)
+{
+	return false;
+}
+#endif
+
+#endif /* _PXA_DMA_H_ */
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index ad419757241f..e2f5eb419976 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -65,6 +65,7 @@ enum dma_transaction_type {
 	DMA_PQ,
 	DMA_XOR_VAL,
 	DMA_PQ_VAL,
+	DMA_MEMSET,
 	DMA_INTERRUPT,
 	DMA_SG,
 	DMA_PRIVATE,
@@ -122,10 +123,18 @@ enum dma_transfer_direction {
  *	 chunk and before first src/dst address for next chunk.
  *	 Ignored for dst(assumed 0), if dst_inc is true and dst_sgl is false.
  *	 Ignored for src(assumed 0), if src_inc is true and src_sgl is false.
+ * @dst_icg: Number of bytes to jump after last dst address of this
+ *	 chunk and before the first dst address for next chunk.
+ *	 Ignored if dst_inc is true and dst_sgl is false.
+ * @src_icg: Number of bytes to jump after last src address of this
+ *	 chunk and before the first src address for next chunk.
+ *	 Ignored if src_inc is true and src_sgl is false.
  */
 struct data_chunk {
 	size_t size;
 	size_t icg;
+	size_t dst_icg;
+	size_t src_icg;
 };
 
 /**
@@ -222,6 +231,16 @@ struct dma_chan_percpu {
 };
 
 /**
+ * struct dma_router - DMA router structure
+ * @dev: pointer to the DMA router device
+ * @route_free: function to be called when the route can be disconnected
+ */
+struct dma_router {
+	struct device *dev;
+	void (*route_free)(struct device *dev, void *route_data);
+};
+
+/**
  * struct dma_chan - devices supply DMA channels, clients use them
  * @device: ptr to the dma device who supplies this channel, always !%NULL
  * @cookie: last cookie value returned to client
@@ -232,6 +251,8 @@ struct dma_chan_percpu {
  * @local: per-cpu pointer to a struct dma_chan_percpu
  * @client_count: how many clients are using this channel
  * @table_count: number of appearances in the mem-to-mem allocation table
+ * @router: pointer to the DMA router structure
+ * @route_data: channel specific data for the router
  * @private: private data for certain client-channel associations
  */
 struct dma_chan {
@@ -247,6 +268,11 @@ struct dma_chan {
 	struct dma_chan_percpu __percpu *local;
 	int client_count;
 	int table_count;
+
+	/* DMA router */
+	struct dma_router *router;
+	void *route_data;
+
 	void *private;
 };
 
@@ -570,6 +596,7 @@ struct dma_tx_state {
  * @copy_align: alignment shift for memcpy operations
  * @xor_align: alignment shift for xor operations
  * @pq_align: alignment shift for pq operations
+ * @fill_align: alignment shift for memset operations
  * @dev_id: unique device ID
  * @dev: struct device reference for dma mapping api
  * @src_addr_widths: bit mask of src addr widths the device supports
@@ -588,6 +615,7 @@ struct dma_tx_state {
  * @device_prep_dma_xor_val: prepares a xor validation operation
  * @device_prep_dma_pq: prepares a pq operation
  * @device_prep_dma_pq_val: prepares a pqzero_sum operation
+ * @device_prep_dma_memset: prepares a memset operation
  * @device_prep_dma_interrupt: prepares an end of chain interrupt operation
  * @device_prep_slave_sg: prepares a slave dma operation
  * @device_prep_dma_cyclic: prepare a cyclic dma operation suitable for audio.
@@ -620,6 +648,7 @@ struct dma_device {
 	u8 copy_align;
 	u8 xor_align;
 	u8 pq_align;
+	u8 fill_align;
 	#define DMA_HAS_PQ_CONTINUE (1 << 15)
 
 	int dev_id;
@@ -650,6 +679,9 @@ struct dma_device {
 		struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src,
 		unsigned int src_cnt, const unsigned char *scf, size_t len,
 		enum sum_check_flags *pqres, unsigned long flags);
+	struct dma_async_tx_descriptor *(*device_prep_dma_memset)(
+		struct dma_chan *chan, dma_addr_t dest, int value, size_t len,
+		unsigned long flags);
 	struct dma_async_tx_descriptor *(*device_prep_dma_interrupt)(
 		struct dma_chan *chan, unsigned long flags);
 	struct dma_async_tx_descriptor *(*device_prep_dma_sg)(
@@ -745,6 +777,17 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_interleaved_dma(
 	return chan->device->device_prep_interleaved_dma(chan, xt, flags);
 }
 
+static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_memset(
+		struct dma_chan *chan, dma_addr_t dest, int value, size_t len,
+		unsigned long flags)
+{
+	if (!chan || !chan->device)
+		return NULL;
+
+	return chan->device->device_prep_dma_memset(chan, dest, value,
+						    len, flags);
+}
+
 static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_sg(
 		struct dma_chan *chan,
 		struct scatterlist *dst_sg, unsigned int dst_nents,
@@ -820,6 +863,12 @@ static inline bool is_dma_pq_aligned(struct dma_device *dev, size_t off1,
 	return dmaengine_check_align(dev->pq_align, off1, off2, len);
 }
 
+static inline bool is_dma_fill_aligned(struct dma_device *dev, size_t off1,
+				       size_t off2, size_t len)
+{
+	return dmaengine_check_align(dev->fill_align, off1, off2, len);
+}
+
 static inline void
 dma_set_maxpq(struct dma_device *dma, int maxpq, int has_pq_continue)
 {
@@ -874,6 +923,33 @@ static inline int dma_maxpq(struct dma_device *dma, enum dma_ctrl_flags flags)
 	BUG();
 }
 
+static inline size_t dmaengine_get_icg(bool inc, bool sgl, size_t icg,
+				      size_t dir_icg)
+{
+	if (inc) {
+		if (dir_icg)
+			return dir_icg;
+		else if (sgl)
+			return icg;
+	}
+
+	return 0;
+}
+
+static inline size_t dmaengine_get_dst_icg(struct dma_interleaved_template *xt,
+					   struct data_chunk *chunk)
+{
+	return dmaengine_get_icg(xt->dst_inc, xt->dst_sgl,
+				 chunk->icg, chunk->dst_icg);
+}
+
+static inline size_t dmaengine_get_src_icg(struct dma_interleaved_template *xt,
+					   struct data_chunk *chunk)
+{
+	return dmaengine_get_icg(xt->src_inc, xt->src_sgl,
+				 chunk->icg, chunk->src_icg);
+}
+
 /* --- public DMA engine API --- */
 
 #ifdef CONFIG_DMA_ENGINE
diff --git a/include/linux/of_dma.h b/include/linux/of_dma.h
index 56bc026c143f..98ba7525929e 100644
--- a/include/linux/of_dma.h
+++ b/include/linux/of_dma.h
@@ -23,6 +23,9 @@ struct of_dma {
 	struct device_node	*of_node;
 	struct dma_chan		*(*of_dma_xlate)
 				(struct of_phandle_args *, struct of_dma *);
+	void			*(*of_dma_route_allocate)
+				(struct of_phandle_args *, struct of_dma *);
+	struct dma_router	*dma_router;
 	void			*of_dma_data;
 };
 
@@ -37,12 +40,20 @@ extern int of_dma_controller_register(struct device_node *np,
 		(struct of_phandle_args *, struct of_dma *),
 		void *data);
 extern void of_dma_controller_free(struct device_node *np);
+
+extern int of_dma_router_register(struct device_node *np,
+		void *(*of_dma_route_allocate)
+		(struct of_phandle_args *, struct of_dma *),
+		struct dma_router *dma_router);
+#define of_dma_router_free of_dma_controller_free
+
 extern struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
 						     const char *name);
 extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
 		struct of_dma *ofdma);
 extern struct dma_chan *of_dma_xlate_by_chan_id(struct of_phandle_args *dma_spec,
 		struct of_dma *ofdma);
+
 #else
 static inline int of_dma_controller_register(struct device_node *np,
 		struct dma_chan *(*of_dma_xlate)
@@ -56,6 +67,16 @@ static inline void of_dma_controller_free(struct device_node *np)
 {
 }
 
+static inline int of_dma_router_register(struct device_node *np,
+		void *(*of_dma_route_allocate)
+		(struct of_phandle_args *, struct of_dma *),
+		struct dma_router *dma_router)
+{
+	return -ENODEV;
+}
+
+#define of_dma_router_free of_dma_controller_free
+
 static inline struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
 						     const char *name)
 {
diff --git a/include/linux/platform_data/dma-rcar-audmapp.h b/include/linux/platform_data/dma-rcar-audmapp.h
deleted file mode 100644
index 471fffebbeb4..000000000000
--- a/include/linux/platform_data/dma-rcar-audmapp.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * This is for Renesas R-Car Audio-DMAC-peri-peri.
- *
- * Copyright (C) 2014 Renesas Electronics Corporation
- * Copyright (C) 2014 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
- *
- * This file is based on the include/linux/sh_dma.h
- *
- * Header for the new SH dmaengine driver
- *
- * Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#ifndef SH_AUDMAPP_H
-#define SH_AUDMAPP_H
-
-#include <linux/dmaengine.h>
-
-struct audmapp_slave_config {
-	int		slave_id;
-	dma_addr_t	src;
-	dma_addr_t	dst;
-	u32		chcr;
-};
-
-struct audmapp_pdata {
-	struct audmapp_slave_config *slave;
-	int slave_num;
-};
-
-#endif /* SH_AUDMAPP_H */