linux-kernel - [PATCH v3 08/13] of: Include a dev param in of_dma_get

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Message-Id: <20200603192058.35296-9-james.quinlan@broadcom.com>
Date:   Wed,  3 Jun 2020 15:20:40 -0400
From:   Jim Quinlan <james.quinlan@...adcom.com>
To:     linux-pci@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        bcm-kernel-feedback-list@...adcom.com, james.quinlan@...adcom.com
Cc:     Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v3 08/13] of: Include a dev param in of_dma_get_range()

Currently there is only one caller of of_dma_get_range().  A struct device
*dev param is needed For implementing multiple dma offsets.  This function
will still work if dev == NULL.

Signed-off-by: Jim Quinlan <james.quinlan@...adcom.com>
---
 drivers/of/address.c    | 4 +++-
 drivers/of/device.c     | 2 +-
 drivers/of/of_private.h | 8 ++++----
 drivers/of/unittest.c   | 2 +-
 4 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/of/address.c b/drivers/of/address.c
index 8eea3f6e29a4..96d8cfb14a60 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -920,6 +920,7 @@ EXPORT_SYMBOL(of_io_request_and_map);
 
 /**
  * of_dma_get_range - Get DMA range info
+ * @dev:	device pointer; only needed for a corner case.
  * @np:		device node to get DMA range info
  * @dma_addr:	pointer to store initial DMA address of DMA range
  * @paddr:	pointer to store initial CPU address of DMA range
@@ -935,7 +936,8 @@ EXPORT_SYMBOL(of_io_request_and_map);
  * It returns -ENODEV if "dma-ranges" property was not found
  * for this device in DT.
  */
-int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *size)
+int of_dma_get_range(struct device *dev, struct device_node *np, u64 *dma_addr,
+		     u64 *paddr, u64 *size)
 {
 	struct device_node *node = of_node_get(np);
 	const __be32 *ranges = NULL;
diff --git a/drivers/of/device.c b/drivers/of/device.c
index 27203bfd0b22..ef6a741f9f0b 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -95,7 +95,7 @@ int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma)
 	const struct iommu_ops *iommu;
 	u64 mask, end;
 
-	ret = of_dma_get_range(np, &dma_addr, &paddr, &size);
+	ret = of_dma_get_range(dev, np, &dma_addr, &paddr, &size);
 	if (ret < 0) {
 		/*
 		 * For legacy reasons, we have to assume some devices need
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h
index edc682249c00..7a83d3a81ab6 100644
--- a/drivers/of/of_private.h
+++ b/drivers/of/of_private.h
@@ -158,11 +158,11 @@ extern int of_bus_n_addr_cells(struct device_node *np);
 extern int of_bus_n_size_cells(struct device_node *np);
 
 #ifdef CONFIG_OF_ADDRESS
-extern int of_dma_get_range(struct device_node *np, u64 *dma_addr,
-			    u64 *paddr, u64 *size);
+extern int of_dma_get_range(struct device *dev, struct device_node *np,
+			    u64 *dma_addr, u64 *paddr, u64 *size);
 #else
-static inline int of_dma_get_range(struct device_node *np, u64 *dma_addr,
-				   u64 *paddr, u64 *size)
+static inline int of_dma_get_range(struct device *dev, struct device_node *np,
+				   u64 *dma_addr, u64 *paddr, u64 *size)
 {
 	return -ENODEV;
 }
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 398de04fd19c..57a22517c428 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -881,7 +881,7 @@ static void __init of_unittest_dma_ranges_one(const char *path,
 		return;
 	}
 
-	rc = of_dma_get_range(np, &dma_addr, &paddr, &size);
+	rc = of_dma_get_range(NULL, np, &dma_addr, &paddr, &size);
 
 	unittest(!rc, "of_dma_get_range failed on node %pOF rc=%i\n", np, rc);
 	if (!rc) {
-- 
2.17.1