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authorFabien Dessenne <fabien.dessenne@st.com>2019-05-31 15:11:30 +0200
committerPatrick Delaunay <patrick.delaunay@st.com>2019-07-22 09:21:28 +0200
commit641067fb0c64dec8b6da962eb1d9fc49a6c7b499 (patch)
tree594af009ab9d03084047c09310018efe257cf926 /include/dm
parent0de815356474912ef5bef9a69f0327a5a93bb2c2 (diff)
dm: core: Introduce xxx_translate_dma_address()
Add the following functions to translate DMA address to CPU address: - dev_translate_dma_address() - ofnode_translate_dma_address() - of_translate_dma_address() - fdt_translate_dma_address() These functions work the same way as xxx_translate_address(), with the difference that the translation relies on the "dma-ranges" property instead of the "ranges" property. Add related test. Test report: => ut dm fdt_translation Test: dm_test_fdt_translation: test-fdt.c Test: dm_test_fdt_translation: test-fdt.c (flat tree) Failures: 0 Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Diffstat (limited to 'include/dm')
-rw-r--r--include/dm/of_addr.h18
-rw-r--r--include/dm/ofnode.h16
-rw-r--r--include/dm/read.h20
3 files changed, 52 insertions, 2 deletions
diff --git a/include/dm/of_addr.h b/include/dm/of_addr.h
index 12b1a99a80..3fa1ffce81 100644
--- a/include/dm/of_addr.h
+++ b/include/dm/of_addr.h
@@ -27,6 +27,24 @@
u64 of_translate_address(const struct device_node *no, const __be32 *in_addr);
/**
+ * of_translate_dma_address() - translate a device-tree DMA address to a CPU
+ * address
+ *
+ * Translate a DMA address from the device-tree into a CPU physical address,
+ * this walks up the tree and applies the various bus mappings on the way.
+ *
+ * Note: We consider that crossing any level with #size-cells == 0 to mean
+ * that translation is impossible (that is we are not dealing with a value
+ * that can be mapped to a cpu physical address). This is not really specified
+ * that way, but this is traditionally the way IBM at least do things
+ *
+ * @np: node to check
+ * @in_addr: pointer to input DMA address
+ * @return translated DMA address or OF_BAD_ADDR on error
+ */
+u64 of_translate_dma_address(const struct device_node *no, const __be32 *in_addr);
+
+/**
* of_get_address() - obtain an address from a node
*
* Extract an address from a node, returns the region size and the address
diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h
index 704f91589a..4f89db44c1 100644
--- a/include/dm/ofnode.h
+++ b/include/dm/ofnode.h
@@ -767,7 +767,7 @@ ofnode ofnode_by_prop_value(ofnode from, const char *propname,
node = ofnode_next_subnode(node))
/**
- * ofnode_translate_address() - Tranlate a device-tree address
+ * ofnode_translate_address() - Translate a device-tree address
*
* Translate an address from the device-tree into a CPU physical address. This
* function walks up the tree and applies the various bus mappings along the
@@ -781,6 +781,20 @@ ofnode ofnode_by_prop_value(ofnode from, const char *propname,
u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr);
/**
+ * ofnode_translate_dma_address() - Translate a device-tree DMA address
+ *
+ * Translate a DMA address from the device-tree into a CPU physical address.
+ * This function walks up the tree and applies the various bus mappings along
+ * the way.
+ *
+ * @ofnode: Device tree node giving the context in which to translate the
+ * DMA address
+ * @in_addr: pointer to the DMA address to translate
+ * @return the translated DMA address; OF_BAD_ADDR on error
+ */
+u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr);
+
+/**
* ofnode_device_is_compatible() - check if the node is compatible with compat
*
* This allows to check whether the node is comaptible with the compat.
diff --git a/include/dm/read.h b/include/dm/read.h
index 60b727cbd8..62d4be6038 100644
--- a/include/dm/read.h
+++ b/include/dm/read.h
@@ -499,7 +499,7 @@ int dev_read_resource_byname(struct udevice *dev, const char *name,
struct resource *res);
/**
- * dev_translate_address() - Tranlate a device-tree address
+ * dev_translate_address() - Translate a device-tree address
*
* Translate an address from the device-tree into a CPU physical address. This
* function walks up the tree and applies the various bus mappings along the
@@ -512,6 +512,19 @@ int dev_read_resource_byname(struct udevice *dev, const char *name,
u64 dev_translate_address(struct udevice *dev, const fdt32_t *in_addr);
/**
+ * dev_translate_dma_address() - Translate a device-tree DMA address
+ *
+ * Translate a DMA address from the device-tree into a CPU physical address.
+ * This function walks up the tree and applies the various bus mappings along
+ * the way.
+ *
+ * @dev: device giving the context in which to translate the DMA address
+ * @in_addr: pointer to the DMA address to translate
+ * @return the translated DMA address; OF_BAD_ADDR on error
+ */
+u64 dev_translate_dma_address(struct udevice *dev, const fdt32_t *in_addr);
+
+/**
* dev_read_alias_highest_id - Get highest alias id for the given stem
* @stem: Alias stem to be examined
*
@@ -751,6 +764,11 @@ static inline u64 dev_translate_address(struct udevice *dev, const fdt32_t *in_a
return ofnode_translate_address(dev_ofnode(dev), in_addr);
}
+static inline u64 dev_translate_dma_address(struct udevice *dev, const fdt32_t *in_addr)
+{
+ return ofnode_translate_dma_address(dev_ofnode(dev), in_addr);
+}
+
static inline int dev_read_alias_highest_id(const char *stem)
{
return fdtdec_get_alias_highest_id(gd->fdt_blob, stem);