linux-kernel - [PATCH v3 15/27] thunderbolt: Expose get

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Message-Id: <20170602140524.23367-16-mika.westerberg@linux.intel.com>
Date:   Fri,  2 Jun 2017 17:05:12 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <yehezkel.bernat@...el.com>,
        Lukas Wunner <lukas@...ner.de>,
        Amir Levy <amir.jer.levy@...el.com>,
        Andy Lutomirski <luto@...nel.org>, Mario.Limonciello@...l.com,
        Jared.Dominguez@...l.com,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 15/27] thunderbolt: Expose get_route() to other files

We are going to use it when we change the connection manager to handle
events itself. Also rename it to follow naming convention used in
functions exposed in ctl.h.

Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
Reviewed-by: Yehezkel Bernat <yehezkel.bernat@...el.com>
Reviewed-by: Michael Jamet <michael.jamet@...el.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/thunderbolt/ctl.c | 19 +++++++------------
 drivers/thunderbolt/ctl.h |  4 ++++
 2 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/thunderbolt/ctl.c b/drivers/thunderbolt/ctl.c
index 24118c60b062..8352ee8662aa 100644
--- a/drivers/thunderbolt/ctl.c
+++ b/drivers/thunderbolt/ctl.c
@@ -54,11 +54,6 @@ struct tb_ctl {
 
 /* utility functions */
 
-static u64 get_route(struct tb_cfg_header header)
-{
-	return (u64) header.route_hi << 32 | header.route_lo;
-}
-
 static struct tb_cfg_header make_header(u64 route)
 {
 	struct tb_cfg_header header = {
@@ -66,7 +61,7 @@ static struct tb_cfg_header make_header(u64 route)
 		.route_lo = route,
 	};
 	/* check for overflow, route_hi is not 32 bits! */
-	WARN_ON(get_route(header) != route);
+	WARN_ON(tb_cfg_get_route(&header) != route);
 	return header;
 }
 
@@ -91,9 +86,9 @@ static int check_header(struct ctl_pkg *pkg, u32 len, enum tb_cfg_pkg_type type,
 	if (WARN(header->unknown != 1 << 9,
 			"header->unknown is %#x\n", header->unknown))
 		return -EIO;
-	if (WARN(route != get_route(*header),
+	if (WARN(route != tb_cfg_get_route(header),
 			"wrong route (expected %llx, got %llx)",
-			route, get_route(*header)))
+			route, tb_cfg_get_route(header)))
 		return -EIO;
 	return 0;
 }
@@ -126,10 +121,10 @@ static struct tb_cfg_result decode_error(struct ctl_pkg *response)
 {
 	struct cfg_error_pkg *pkg = response->buffer;
 	struct tb_cfg_result res = { 0 };
-	res.response_route = get_route(pkg->header);
+	res.response_route = tb_cfg_get_route(&pkg->header);
 	res.response_port = 0;
 	res.err = check_header(response, sizeof(*pkg), TB_CFG_PKG_ERROR,
-			       get_route(pkg->header));
+			       tb_cfg_get_route(&pkg->header));
 	if (res.err)
 		return res;
 
@@ -153,7 +148,7 @@ static struct tb_cfg_result parse_header(struct ctl_pkg *pkg, u32 len,
 		return decode_error(pkg);
 
 	res.response_port = 0; /* will be updated later for cfg_read/write */
-	res.response_route = get_route(*header);
+	res.response_route = tb_cfg_get_route(header);
 	res.err = check_header(pkg, len, type, route);
 	return res;
 }
@@ -294,7 +289,7 @@ static void tb_ctl_handle_plug_event(struct tb_ctl *ctl,
 				     struct ctl_pkg *response)
 {
 	struct cfg_event_pkg *pkg = response->buffer;
-	u64 route = get_route(pkg->header);
+	u64 route = tb_cfg_get_route(&pkg->header);
 
 	if (check_header(response, sizeof(*pkg), TB_CFG_PKG_EVENT, route)) {
 		tb_ctl_warn(ctl, "malformed TB_CFG_PKG_EVENT\n");
diff --git a/drivers/thunderbolt/ctl.h b/drivers/thunderbolt/ctl.h
index 610980e3232f..9812b1c86d4f 100644
--- a/drivers/thunderbolt/ctl.h
+++ b/drivers/thunderbolt/ctl.h
@@ -38,6 +38,10 @@ struct tb_cfg_result {
 	enum tb_cfg_error tb_error; /* valid if err == 1 */
 };
 
+static inline u64 tb_cfg_get_route(const struct tb_cfg_header *header)
+{
+	return (u64) header->route_hi << 32 | header->route_lo;
+}
 
 int tb_cfg_error(struct tb_ctl *ctl, u64 route, u32 port,
 		 enum tb_cfg_error error);
-- 
2.11.0