Merge tag 'dmaengine-4.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine updates from Vinod Koul:
 "This time we have aded a new capability for scatter-gathered memset
  using dmaengine APIs.  This is supported in xdmac & hdmac drivers

  We have added support for reusing descriptors for examples like video
  buffers etc.  Driver will follow

  The behaviour of descriptor ack has been clarified and documented

  New devices added are:
   - dma controller in sun[457]i SoCs
   - lpc18xx dmamux
   - ZTE ZX296702 dma controller
   - Analog Devices AXI-DMAC DMA controller
   - eDMA support for dma-crossbar
   - imx6sx support in imx-sdma driver
   - imx-sdma device to device support

  Other:
   - jz4780 fixes
   - ioatdma large refactor and cleanup for removal of ioat v1 and v2
     which is deprecated and fixes
   - ACPI support in X-Gene DMA engine driver
   - ipu irq fixes
   - mvxor fixes
   - minor fixes spread thru drivers"

[ The Kconfig and Makefile entries got re-sorted alphabetically, and I
  handled the conflict with the new Intel integrated IDMA driver by
  slightly mis-sorting it on purpose: "IDMA64" got sorted after "IMX" in
  order to keep the Intel entries together.  I think it might be a good
  idea to just rename the IDMA64 config entry to INTEL_IDMA64 to make
  the sorting be a true sort, not this mismash.

  Also, this merge disables the COMPILE_TEST for the sun4i DMA
  controller, because it does not compile cleanly at all.     - Linus ]

* tag 'dmaengine-4.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (89 commits)
  dmaengine: ioatdma: add Broadwell EP ioatdma PCI dev IDs
  dmaengine :ipu: change ipu_irq_handler() to remove compile warning
  dmaengine: ioatdma: Fix variable array length
  dmaengine: ioatdma: fix sparse "error" with prep lock
  dmaengine: hdmac: Add memset capabilities
  dmaengine: sort the sh Makefile
  dmaengine: sort the sh Kconfig
  dmaengine: sort the dw Kconfig
  dmaengine: sort the Kconfig
  dmaengine: sort the makefile
  drivers/dma: make mv_xor.c driver explicitly non-modular
  dmaengine: Add support for the Analog Devices AXI-DMAC DMA controller
  devicetree: Add bindings documentation for Analog Devices AXI-DMAC
  dmaengine: xgene-dma: Fix the lock to allow client for further submission of requests
  dmaengine: ioatdma: fix coccinelle warning
  dmaengine: ioatdma: fix zero day warning on incompatible pointer type
  dmaengine: tegra-apb: Simplify locking for device using global pause
  dmaengine: tegra-apb: Remove unnecessary return statements and variables
  dmaengine: tegra-apb: Avoid unnecessary channel base address calculation
  dmaengine: tegra-apb: Remove unused variables
  ...

1 files changed, 31 insertions, 10 deletions

diff --git a/drivers/dma/ti-dma-crossbar.c b/drivers/dma/ti-dma-crossbar.c
index 24f5ca2356bf..5cce8c9d0026 100644
--- a/drivers/dma/ti-dma-crossbar.c
+++ b/drivers/dma/ti-dma-crossbar.c
@@ -20,16 +20,19 @@
 #define TI_XBAR_OUTPUTS	127
 #define TI_XBAR_INPUTS	256
 
-static DEFINE_IDR(map_idr);
+#define TI_XBAR_EDMA_OFFSET	0
+#define TI_XBAR_SDMA_OFFSET	1
 
 struct ti_dma_xbar_data {
 	void __iomem *iomem;
 
 	struct dma_router dmarouter;
+	struct idr map_idr;
 
 	u16 safe_val; /* Value to rest the crossbar lines */
 	u32 xbar_requests; /* number of DMA requests connected to XBAR */
 	u32 dma_requests; /* number of DMA requests forwarded to DMA */
+	u32 dma_offset;
 };
 
 struct ti_dma_xbar_map {
@@ -51,7 +54,7 @@ static void ti_dma_xbar_free(struct device *dev, void *route_data)
 		map->xbar_in, map->xbar_out);
 
 	ti_dma_xbar_write(xbar->iomem, map->xbar_out, xbar->safe_val);
-	idr_remove(&map_idr, map->xbar_out);
+	idr_remove(&xbar->map_idr, map->xbar_out);
 	kfree(map);
 }
 
@@ -81,12 +84,11 @@ static void *ti_dma_xbar_route_allocate(struct of_phandle_args *dma_spec,
 		return ERR_PTR(-ENOMEM);
 	}
 
-	map->xbar_out = idr_alloc(&map_idr, NULL, 0, xbar->dma_requests,
+	map->xbar_out = idr_alloc(&xbar->map_idr, NULL, 0, xbar->dma_requests,
 				  GFP_KERNEL);
 	map->xbar_in = (u16)dma_spec->args[0];
 
-	/* The DMA request is 1 based in sDMA */
-	dma_spec->args[0] = map->xbar_out + 1;
+	dma_spec->args[0] = map->xbar_out + xbar->dma_offset;
 
 	dev_dbg(&pdev->dev, "Mapping XBAR%u to DMA%d\n",
 		map->xbar_in, map->xbar_out);
@@ -96,9 +98,22 @@ static void *ti_dma_xbar_route_allocate(struct of_phandle_args *dma_spec,
 	return map;
 }
 
+static const struct of_device_id ti_dma_master_match[] = {
+	{
+		.compatible = "ti,omap4430-sdma",
+		.data = (void *)TI_XBAR_SDMA_OFFSET,
+	},
+	{
+		.compatible = "ti,edma3",
+		.data = (void *)TI_XBAR_EDMA_OFFSET,
+	},
+	{},
+};
+
 static int ti_dma_xbar_probe(struct platform_device *pdev)
 {
 	struct device_node *node = pdev->dev.of_node;
+	const struct of_device_id *match;
 	struct device_node *dma_node;
 	struct ti_dma_xbar_data *xbar;
 	struct resource *res;
@@ -113,12 +128,20 @@ static int ti_dma_xbar_probe(struct platform_device *pdev)
 	if (!xbar)
 		return -ENOMEM;
 
+	idr_init(&xbar->map_idr);
+
 	dma_node = of_parse_phandle(node, "dma-masters", 0);
 	if (!dma_node) {
 		dev_err(&pdev->dev, "Can't get DMA master node\n");
 		return -ENODEV;
 	}
 
+	match = of_match_node(ti_dma_master_match, dma_node);
+	if (!match) {
+		dev_err(&pdev->dev, "DMA master is not supported\n");
+		return -EINVAL;
+	}
+
 	if (of_property_read_u32(dma_node, "dma-requests",
 				 &xbar->dma_requests)) {
 		dev_info(&pdev->dev,
@@ -139,17 +162,15 @@ static int ti_dma_xbar_probe(struct platform_device *pdev)
 		xbar->safe_val = (u16)safe_val;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENODEV;
-
 	iomem = devm_ioremap_resource(&pdev->dev, res);
-	if (!iomem)
-		return -ENOMEM;
+	if (IS_ERR(iomem))
+		return PTR_ERR(iomem);
 
 	xbar->iomem = iomem;
 
 	xbar->dmarouter.dev = &pdev->dev;
 	xbar->dmarouter.route_free = ti_dma_xbar_free;
+	xbar->dma_offset = (u32)match->data;
 
 	platform_set_drvdata(pdev, xbar);