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From: Hemant Agrawal <hemant.agrawal@nxp.com>
To: dev@dpdk.org
Cc: ferruh.yigit@intel.com,
Akhil Goyal <akhil.goyal@nxp.com>
Date: Thu, 21 Jun 2018 15:13:58 +0530
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Subject: [dpdk-dev] [PATCH 04/10] bus/dpaa: implement new of API to get MAC
address
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From: Akhil Goyal <akhil.goyal@nxp.com>
Signed-off-by: Akhil Goyal <akhil.goyal@nxp.com>
---
drivers/bus/dpaa/base/fman/of.c | 39 +++++++++++++++++++++++++++++++
drivers/bus/dpaa/include/of.h | 2 ++
drivers/bus/dpaa/rte_bus_dpaa_version.map | 8 +++++++
3 files changed, 49 insertions(+)
diff --git a/drivers/bus/dpaa/base/fman/of.c b/drivers/bus/dpaa/base/fman/of.c
index eb55cb9..a7f3174 100644
--- a/drivers/bus/dpaa/base/fman/of.c
+++ b/drivers/bus/dpaa/base/fman/of.c
@@ -546,3 +546,42 @@ of_device_is_compatible(const struct device_node *dev_node,
return true;
return false;
}
+
+static const void *of_get_mac_addr(const struct device_node *np,
+ const char *name)
+{
+ return of_get_property(np, name, NULL);
+}
+
+/**
+ * Search the device tree for the best MAC address to use. 'mac-address' is
+ * checked first, because that is supposed to contain to "most recent" MAC
+ * address. If that isn't set, then 'local-mac-address' is checked next,
+ * because that is the default address. If that isn't set, then the obsolete
+ * 'address' is checked, just in case we're using an old device tree.
+ *
+ * Note that the 'address' property is supposed to contain a virtual address of
+ * the register set, but some DTS files have redefined that property to be the
+ * MAC address.
+ *
+ * All-zero MAC addresses are rejected, because those could be properties that
+ * exist in the device tree, but were not set by U-Boot. For example, the
+ * DTS could define 'mac-address' and 'local-mac-address', with zero MAC
+ * addresses. Some older U-Boots only initialized 'local-mac-address'. In
+ * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
+ * but is all zeros.
+ */
+const void *of_get_mac_address(const struct device_node *np)
+{
+ const void *addr;
+
+ addr = of_get_mac_addr(np, "mac-address");
+ if (addr)
+ return addr;
+
+ addr = of_get_mac_addr(np, "local-mac-address");
+ if (addr)
+ return addr;
+
+ return of_get_mac_addr(np, "address");
+}
diff --git a/drivers/bus/dpaa/include/of.h b/drivers/bus/dpaa/include/of.h
index 151be5a..7ea7608 100644
--- a/drivers/bus/dpaa/include/of.h
+++ b/drivers/bus/dpaa/include/of.h
@@ -109,6 +109,8 @@ const struct device_node *of_get_parent(const struct device_node *dev_node);
const struct device_node *of_get_next_child(const struct device_node *dev_node,
const struct device_node *prev);
+const void *of_get_mac_address(const struct device_node *np);
+
#define for_each_child_node(parent, child) \
for (child = of_get_next_child(parent, NULL); child != NULL; \
child = of_get_next_child(parent, child))
diff --git a/drivers/bus/dpaa/rte_bus_dpaa_version.map b/drivers/bus/dpaa/rte_bus_dpaa_version.map
index 8d90285..e00c911 100644
--- a/drivers/bus/dpaa/rte_bus_dpaa_version.map
+++ b/drivers/bus/dpaa/rte_bus_dpaa_version.map
@@ -92,3 +92,11 @@ DPDK_18.02 {
local: *;
} DPDK_17.11;
+
+DPDK_18.08 {
+ global:
+
+ of_get_mac_address;
+
+ local: *;
+} DPDK_18.02;
--
2.7.4