[PATCH 15/19] thunderbolt: Export symbols required by the Apple Silicon driver

[Sven Peter]

The driver for the ACIO host router complex on Apple Silicon SoCs can
be built as a module and needs tb_probe() and the domain functions to
register its NHI with the software connection manager as well as
tb_switch_find_vse_cap(), tb_cfg_write() and tb_port_unlock() to
configure the cable details for its co-processor and to unlock the
lane ports. Restrict these exports to the thunderbolt_apple module to
keep them internal to the Thunderbolt subsystem.

Signed-off-by: Sven Peter <sven at kernel.org>
---
 drivers/thunderbolt/cap.c    | 2 ++
 drivers/thunderbolt/ctl.c    | 2 ++
 drivers/thunderbolt/domain.c | 2 ++
 drivers/thunderbolt/switch.c | 1 +
 drivers/thunderbolt/tb.c     | 2 ++
 5 files changed, 9 insertions(+)

diff --git a/drivers/thunderbolt/cap.c b/drivers/thunderbolt/cap.c
index 4ab22d5291ac..e000a53e5e75 100644
--- a/drivers/thunderbolt/cap.c
+++ b/drivers/thunderbolt/cap.c
@@ -6,6 +6,7 @@
  * Copyright (C) 2018, Intel Corporation
  */
 
+#include <linux/export.h>
 #include <linux/slab.h>
 #include <linux/errno.h>
 
@@ -254,3 +255,4 @@ int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec)
 
 	return -ENOENT;
 }
+EXPORT_SYMBOL_FOR_MODULES(tb_switch_find_vse_cap, "thunderbolt_apple");
diff --git a/drivers/thunderbolt/ctl.c b/drivers/thunderbolt/ctl.c
index cd47b627f97b..b2a6b300e934 100644
--- a/drivers/thunderbolt/ctl.c
+++ b/drivers/thunderbolt/ctl.c
@@ -8,6 +8,7 @@
 
 #include <linux/crc32.h>
 #include <linux/delay.h>
+#include <linux/export.h>
 #include <linux/slab.h>
 #include <linux/pci.h>
 #include <linux/dmapool.h>
@@ -1159,6 +1160,7 @@ int tb_cfg_write(struct tb_ctl *ctl, const void *buffer, u64 route, u32 port,
 	}
 	return res.err;
 }
+EXPORT_SYMBOL_FOR_MODULES(tb_cfg_write, "thunderbolt_apple");
 
 /**
  * tb_cfg_get_upstream_port() - get upstream port number of switch at route
diff --git a/drivers/thunderbolt/domain.c b/drivers/thunderbolt/domain.c
index 12c88509a54f..477a64258b87 100644
--- a/drivers/thunderbolt/domain.c
+++ b/drivers/thunderbolt/domain.c
@@ -490,6 +490,7 @@ int tb_domain_add(struct tb *tb, bool reset)
 
 	return ret;
 }
+EXPORT_SYMBOL_FOR_MODULES(tb_domain_add, "thunderbolt_apple");
 
 /**
  * tb_domain_remove() - Removes and releases a domain
@@ -514,6 +515,7 @@ void tb_domain_remove(struct tb *tb)
 
 	device_unregister(&tb->dev);
 }
+EXPORT_SYMBOL_FOR_MODULES(tb_domain_remove, "thunderbolt_apple");
 
 /**
  * tb_domain_suspend_noirq() - Suspend a domain
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index ef267f40c103..db675e4f0bc2 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -627,6 +627,7 @@ int tb_port_unlock(struct tb_port *port)
 		return usb4_port_unlock(port);
 	return 0;
 }
+EXPORT_SYMBOL_FOR_MODULES(tb_port_unlock, "thunderbolt_apple");
 
 static int __tb_port_enable(struct tb_port *port, bool enable)
 {
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 7ab53a30fe30..6a1f49c473eb 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -6,6 +6,7 @@
  * Copyright (C) 2019, Intel Corporation
  */
 
+#include <linux/export.h>
 #include <linux/slab.h>
 #include <linux/errno.h>
 #include <linux/delay.h>
@@ -3442,3 +3443,4 @@ struct tb *tb_probe(struct tb_nhi *nhi)
 
 	return tb;
 }
+EXPORT_SYMBOL_FOR_MODULES(tb_probe, "thunderbolt_apple");

-- 
2.55.0