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Subject[v2 3/6] of: address: add support to parse PCI outbound-ranges
Date
From: "Lad, Prabhakar" <prabhakar.mahadev-lad.rj@bp.renesas.com>

this patch adds support to parse PCI outbound-ranges, the
outbound-regions are similar to pci ranges except it doesn't
have pci address, below is the format for bar-ranges:

outbound-ranges = <flags upper32_cpuaddr lower32_cpuaddr
upper32_size lower32_size>;

Signed-off-by: Lad, Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
drivers/of/address.c | 44 ++++++++++++++++++++++++++++++++++++++++----
include/linux/of_address.h | 21 +++++++++++++++++++++
2 files changed, 61 insertions(+), 4 deletions(-)

diff --git a/drivers/of/address.c b/drivers/of/address.c
index 978427a..ca4643c 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -233,9 +233,9 @@ int of_pci_address_to_resource(struct device_node *dev, int bar,
EXPORT_SYMBOL_GPL(of_pci_address_to_resource);

static int parser_init(struct of_pci_range_parser *parser,
- struct device_node *node, const char *name)
+ struct device_node *node, const char *name,
+ const int na, const int ns)
{
- const int na = 3, ns = 2;
int rlen;

parser->node = node;
@@ -254,17 +254,30 @@ static int parser_init(struct of_pci_range_parser *parser,
int of_pci_range_parser_init(struct of_pci_range_parser *parser,
struct device_node *node)
{
- return parser_init(parser, node, "ranges");
+ const int na = 3, ns = 2;
+
+ return parser_init(parser, node, "ranges", na, ns);
}
EXPORT_SYMBOL_GPL(of_pci_range_parser_init);

int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
struct device_node *node)
{
- return parser_init(parser, node, "dma-ranges");
+ const int na = 3, ns = 2;
+
+ return parser_init(parser, node, "dma-ranges", na, ns);
}
EXPORT_SYMBOL_GPL(of_pci_dma_range_parser_init);

+int of_pci_outbound_range_parser_init(struct of_pci_range_parser *parser,
+ struct device_node *node)
+{
+ const int na = 1, ns = 2;
+
+ return parser_init(parser, node, "outbound-ranges", na, ns);
+}
+EXPORT_SYMBOL_GPL(of_pci_outbound_range_parser_init);
+
struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
struct of_pci_range *range)
{
@@ -310,6 +323,29 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
}
EXPORT_SYMBOL_GPL(of_pci_range_parser_one);

+struct of_pci_outbound_range
+*of_pci_outbound_range_parser_one(struct of_pci_range_parser *parser,
+ struct of_pci_outbound_range *range)
+{
+ const int na = 1, ns = 2;
+
+ if (!range)
+ return NULL;
+
+ if (!parser->range || parser->range + parser->np > parser->end)
+ return NULL;
+
+ range->flags = be32_to_cpup(parser->range);
+ range->cpu_addr = of_translate_address(parser->node,
+ parser->range + na);
+ range->size = of_read_number(parser->range + parser->pna + na, ns);
+
+ parser->range += parser->np;
+
+ return range;
+}
+EXPORT_SYMBOL_GPL(of_pci_outbound_range_parser_one);
+
/*
* of_pci_range_to_resource - Create a resource from an of_pci_range
* @range: the PCI range that describes the resource
diff --git a/include/linux/of_address.h b/include/linux/of_address.h
index 30e40fb..93b3be3 100644
--- a/include/linux/of_address.h
+++ b/include/linux/of_address.h
@@ -22,9 +22,18 @@ struct of_pci_range {
u32 flags;
};

+struct of_pci_outbound_range {
+ u32 flags;
+ u64 cpu_addr;
+ u64 size;
+};
+
#define for_each_of_pci_range(parser, range) \
for (; of_pci_range_parser_one(parser, range);)

+#define for_each_of_pci_outbound_range(parser, range) \
+ for (; of_pci_outbound_range_parser_one(parser, range);)
+
/* Translate a DMA address from device space to CPU space */
extern u64 of_translate_dma_address(struct device_node *dev,
const __be32 *in_addr);
@@ -52,9 +61,14 @@ extern int of_pci_range_parser_init(struct of_pci_range_parser *parser,
struct device_node *node);
extern int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
struct device_node *node);
+extern int of_pci_outbound_range_parser_init(struct of_pci_range_parser *parser,
+ struct device_node *node);
extern struct of_pci_range *of_pci_range_parser_one(
struct of_pci_range_parser *parser,
struct of_pci_range *range);
+extern struct of_pci_outbound_range
+*of_pci_outbound_range_parser_one(struct of_pci_range_parser *parser,
+ struct of_pci_outbound_range *range);
extern int of_dma_get_range(struct device_node *np, u64 *dma_addr,
u64 *paddr, u64 *size);
extern bool of_dma_is_coherent(struct device_node *np);
@@ -97,6 +111,13 @@ static inline int of_pci_dma_range_parser_init(struct of_pci_range_parser *parse
return -ENOSYS;
}

+static inline int
+of_pci_outbound_range_parser_init(struct of_pci_range_parser *parser,
+ struct device_node *node)
+{
+ return -ENOSYS;
+}
+
static inline struct of_pci_range *of_pci_range_parser_one(
struct of_pci_range_parser *parser,
struct of_pci_range *range)
--
2.7.4
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